1 ----------------------------------------
4 13 November 2020. Summary of changes for version 20201113:
6 This release is available at https://acpica.org/downloads
9 1) ACPICA kernel-resident subsystem:
11 Interpreter: fixed a memory leak by using use existing buffer in _HID
12 repair. There was a memory leak that occurred when a _CID object is
13 defined as a package containing string objects. When _CID is checked for
14 any possible repairs, it calls a helper function to repair _HID (because
15 _CID basically contains multiple _HID entries). The _HID repair function
16 assumes that string objects are standalone objects that are not contained
17 inside of any packages. The _HID repair function replaced the string
18 object with a brand new object and attempted to delete the old object by
19 decrementing the reference count of the old object. Strings inside of
20 packages have a reference count of 2 so the _HID repair function leaves
21 this object in a dangling state and causes a memory leak. Instead of
22 allocating a brand new object and removing the old object, use the
23 existing object when repairing the _HID object.
25 Added function trace macros to improve namespace debugging. The namespace
26 repair mechanism does not have function tracing macros. Add several trace
27 macros to improve debuggability.
29 Handle "orphan" _REG methods for GPIO OpRegions. Before this change
30 AcpiEvExecuteRegMethods() had special handling to handle "orphan" (no
31 matching OpRegion declared) _REG methods for EC nodes. On Intel Cherry
32 Trail devices there are 2 possible ACPI OpRegions for accessing GPIOs.
33 The standard GeneralPurposeIo OpRegion and the Cherry Trail - specific
34 UserDefined 0x9X OpRegions. Having 2 different types of OpRegions leads
35 to potential issues with checks for OpRegion availability, or in other
36 words checks if _REG has been called for the OpRegion which the ACPI code
37 wants to use. Except for the "orphan" EC handling, ACPICA core does not
38 call _REG on an ACPI node which does not define an OpRegion matching the
39 type being registered; and the reference design DSDT, from which most
40 Cherry Trail DSDTs are derived, does not define GeneralPurposeIo, nor
41 UserDefined(0x93) OpRegions for the GPO2 (UID 3) device, because no pins
42 were assigned ACPI controlled functions in the reference design. Together
43 this leads to the perfect storm, at least on the Cherry Trail based
44 Medion Akayo E1239T. This design does use a GPO2 pin from its ACPI code
45 and has added the Cherry Trail specific UserDefined(0x93) opregion to its
46 GPO2 ACPI node to access this pin. But it uses a "has _REG been called"
47 availability check for the standard GeneralPurposeIo OpRegion. This
48 clearly is a bug in the DSDT, but this does work under Windows. This
49 issue leads to the intel vbtn driver reporting the device always being in
50 tablet-mode at boot, even if it is in laptop mode. Which in turn causes
51 userspace to ignore touchpad events. So in other words, this issue causes
52 the touchpad to not work at boot. This change fixes this by extending the
53 "orphan" _REG method handling to also apply to GPIO address-space
57 2) iASL Compiler/Disassembler and ACPICA tools:
59 iASL: Added more info to namespace dump file (-ln option). In a separate
60 section of the dump file (after the main namespace dump), emit the full
61 pathname for each namespace node, its type, and the ASL filename and line
62 number where it is declared.
64 AcpiHelp: Added an option to display/decode iASL exceptions. Option is: -
65 x [Hex Value] where "Hex Value" is the iASL exception code. If Hex Value
66 is omitted, all iASL exceptions are displayed.
68 iASL: Use StringLiteral instead of StringData for some ASL macros. The
69 use of the stringData rule allows for some "string" oriented opcodes
70 (Such as ToString, ToHexString, etc.) None of which make sense with the
71 macros in question. This change modifies the StringData part of the rule
72 for these macros to a simple string literal - thus disallowing the use
73 of ToString, ToHexString, etc.
74 The following ASL operators (macros) are affected:
80 Note: The MS compiler requires the use of string literals for these
83 iASL: Added a remark for an unknown UUID: ASL_MSG_UUID_NOT_FOUND. Search
84 the list of "known" UUIDs for the input to the ToUUID macro.
86 Added 5 new UUIDs to the known UUID table. All related to NVDIMM and the
90 ----------------------------------------
92 25 September 2020. Summary of changes for version 20200925:
94 This release is available at https://acpica.org/downloads
97 1) ACPICA kernel-resident subsystem:
99 Preserve memory opregion mappings. The ACPICA's strategy with respect to
100 the handling of memory mappings associated with memory operation regions
101 is to avoid mapping the entire region at once which may be problematic at
102 least in principle (for example, it may lead to conflicts with
103 overlapping mappings having different attributes created by drivers). It
104 may also be wasteful, because memory opregions on some systems take up
105 vastchunks of address space while the fields in those regions actually
106 accessed by AML are sparsely distributed.
108 For this reason, a one-page "window" is mapped for a given opregion on
109 the first memory access through it and if that "window" does not cover an
110 address range accessed through that opregion subsequently, it is unmapped
111 and a new "window" is mapped to replace it. Next, if the new "window" is
112 not sufficient to access memory through the opregion in question in the
113 future, it will be replaced with yet another "window" and so on. That
114 may lead to a suboptimal sequence of memory mapping and unmapping
115 operations, for example if two fields in one opregion separated from each
116 other by a sufficiently wide chunk of unused address space are accessed
117 in an alternating pattern.
119 Added support for 64 bit risc-v compilation. Useful for acpica tools and
120 incorporating ACPICA into the Firmware Test Suite. Colin Ian King
121 <colin.king@canonical.com>.
123 Added support for SMBus predefined names (from SMBus Control Method
124 Interface Specification, Version 1.0, December 10, 1999. New predefined
132 AML Disassembler: Added a new command, "All <NameSeg>". This command will
133 evaluate all objects in the current namespace whose NameString contains
134 the input NameSeg as the last element of the NameString. Useful for
138 2) iASL Compiler/Disassembler and ACPICA tools:
140 iASL: fixed a crash that occurred when predefined objects return packages
141 with lengths that exceed the initializer list.
143 iASL: added more detail to external resolution error message when
144 compiling multiple definition blocks.
146 iASL: added a remark for an attempt to create a nameseg or namestring
147 containing lower-case letters. This should prevent declaring multiple
148 namesegs or namestrings in an attempt to refer to different objects (with
149 different cases), but actually refer to the same object(s).
151 iASL: improve alias analysis by saving object type. If the alias is a
152 method type, the parameter count is also recorded.
154 AcpiExec: Increase the default loop timeout value. Was 1 second, is now
155 10 seconds. Prevents unnecessary timeouts when executing control methods
156 from the command line.
158 AcpiHelp/disassembler: Added a bunch of "known" UUIDs to the internal
161 Generic Buttons Device
163 Control Method Battery
164 Device Graphs for _DSD method
165 Hierarchical Data Extension
166 ....ARM CoreSight Graph
168 ----------------------------------------
171 17 July 2020. Summary of changes for version 20200717:
173 This release is available at https://acpica.org/downloads
176 1) ACPICA kernel-resident subsystem:
178 Do not increment OperationRegion reference counts for field units. Recent
179 server firmware has revealed that this reference count can overflow on
180 large servers that declare many field units (thousands) under the same
181 OperationRegion. This occurs because each field unit declaration will add
182 a reference count to the source OperationRegion. This release solves the
183 reference count overflow for OperationRegion objects by preventing
184 fieldUnits from incrementing their parent OperationRegion's reference
187 Replaced one-element arrays with flexible-arrays, which were introduced
190 Restored the readme file containing the directions for generation of
191 ACPICA from source on MSVC 2017. Updated the file for MSVC 2017. File is
192 located at: generate/msvc2017/readme.txt
194 2) iASL Compiler/Disassembler and ACPICA tools:
196 iASL: Fixed a regression found in version 20200214. Prevent iASL from
197 emitting an extra byte of garbage data when control methods declared a
198 single parameter type without using braces. This extra byte is known to
199 cause a blue screen on the Windows AML interpreter.
201 iASL: Made a change to allow external declarations to specify the type of
202 a named object even when some name segments are not defined.
203 This change allows the following ASL code to compile (When DEV0 is not
204 defined or not defined yet):
206 External (\_SB.DEV0.OBJ1, IntObj)
207 External (\_SB.DEV0, DeviceObj)
209 iASL: Fixed a problem where method names in "Alias ()" statement could be
210 misinterpreted. They are now interpreted correctly as method invocations.
212 iASL: capture a method parameter count (Within the Method info segment,
213 as well as the argument node) when using parameter type lists.
215 ----------------------------------------
218 28 May 2020. Summary of changes for version 20200528:
221 1) ACPICA kernel-resident subsystem:
223 Removed old/obsolete Visual Studio files which were used to build the
224 Windows versions of the ACPICA tools. Since we have moved to Visual
225 Studio 2017, we are no longer supporting Visual Studio 2006 and 2009
226 project files. The new subdirectory and solution file are located at:
228 acpica/generate/msvc2017/AcpiComponents.sln
231 2) iASL Compiler/Disassembler and ACPICA tools:
233 iASL: added support for a new OperationRegion Address Space (subtype):
234 PlatformRtMechanism. Support for this new keyword is being released for
235 early prototyping. It will appear in the next release of the ACPI
238 iASL: do not optimize the NameString parameter of the CondRefOf operator.
239 In the previous iASL compiler release, the NameString parameter of the
240 CondRefOf was optimized. There is evidence that some implementations of
241 the AML interpreter do not perform the recursive search-to-parent search
242 during the execution of the CondRefOf operator. Therefore, the CondRefOf
243 operator behaves differently when the NameString parameter is a single
244 name segment (a NameSeg) as opposed to a full NamePath (starting at the
245 root scope) or a NameString containing parent prefixes.
247 iASL: Prevent an inadvertent remark message. This change prevents a
248 remark if within a control method the following exist:
249 1) An Operation Region is defined, and
250 2) A Field operator is defined that refers to the region.
251 This happens because at the top level, the Field operator does not
252 actually create a new named object, it simply references the operation
255 Removed support for the acpinames utility. The acpinames was a simple
256 utility used to populate and display the ACPI namespace without executing
257 any AML code. However, ACPICA now supports executable opcodes outside of
258 control methods. This means that executable AML opcodes such as If and
259 Store opcodes need to be executed during table load. Therefore, acpinames
260 would need to be updated to match the same behavior as the acpiexec
261 utility and since acpiexec can already dump the entire namespace (via the
262 'namespace' command), we no longer have the need to maintain acpinames.
264 In order to dump the contents of the ACPI namespace using acpiexec,
265 execute the following command from the command line:
267 acpiexec -b "n" [aml files]
269 ----------------------------------------
272 30 April 2020. Summary of changes for version 20200430:
274 1) ACPICA kernel-resident subsystem:
276 Cleaned up the coding style of a couple of global variables
277 (AcpiGbl_NextCmdNum and AcpiProtocolLengths) caught by static analyzers.
278 AcpiProtocolLengths was made static, and the definition of
279 AcpiGbl_NextCmdNum was moved to acglobal.h.
282 2) iASL Compiler/Disassembler and ACPICA tools:
284 iASL DataTable Compiler: Fixed a segfault on errors that aren't directly
285 associated with a field.
287 Disassembler: has been made more resilient so that it will continue to
288 parse AML even if the AML generates ACPI namespace errors. This enables
289 iASL to disassemble some AML that may have been compiled using older
290 versions of iASL that no longer compile with newer versions of iASL.
292 iASL: Fixed the required parameters for _NIH and _NIG. Previously, there
293 was a mixup where _NIG required one parameter and _NIH required zero
294 parameters. This change swaps these parameter requirements. Now it is
295 required that _NIH must be called with one parameter and _NIG requires
298 iASL: Allow use of undefined externals as long as they are protected by
299 an if (CondRefOf (...)) block when compiling multiple definition blocks.
301 iASL: Fixed the type override behavior of named objects that are declared
302 as External. External declarations will no longer override the type of
303 the actual definition if it already exists.
305 AcpiNames: Added setargv.obj to the MSVC 2017 link sequence to enable
306 command line wildcard support on Windows. Note: the AcpiNames utility is
307 essentially redundant with the AcpiExec utility (using the "namespace"
308 command) and is therefore deprecated. It will be removed in future
311 Disassembler: ignore AE_ALREADY_EXISTS status when parsing create*
312 operators. The disassembler is intended to emit existing ASL code as-is.
313 Therefore, error messages emitted during disassembly should be ignored or
314 handled in a way such that the disassembler can continue to parse the
315 AML. This change ignores AE_ALREADY_EXISTS errors during the deferred Op
316 parsing for create operators in order to complete parsing ASL termlists.
318 iASL DataTable Compiler: IVRS table: fix potentially uninitialized
319 variable warning. Some compilers catch potential uninitialized variables.
320 This is done by examining branches of if/else statements. This change
321 replaces an "else if" with an "else" to fix the uninitialized variable
325 ----------------------------------------
326 26 March 2020. Summary of changes for version 20200326:
329 1) ACPICA kernel-resident subsystem:
331 Performed a code clean-up to prevent build errors on early versions of
334 Added the NHLT table signature. iASL data table compiler/disassembler
335 support for this table is coming soon.
338 2) iASL Compiler/Disassembler and ACPICA tools:
340 AcpiExec: Fixed several problems with the namespace initialization file
341 (-fi<filename> option). Includes fixes to prevent AE_ALREADY_EXISTS
342 errors, several seg faults, and enhancements to line parsing within the
343 init file. In addition, each object found in the init file and it's new
344 value is displayed, as well as any such entries that do not have a
345 corresponding name in the namespace. For reference, the syntax for the
346 various supported data types are presented below:
347 PCHG 0x777788889999BBBB // Integer
348 \DEV1.STR1 "XYZ" // String
349 BUF1 (88 99 AA) // Buffer
350 PKG1 [0x1111 0x2222] // Package
351 \BF1 0x7980 // BufferField
352 RCRV 0x0123456789ABCDEF // Field Unit
354 iASL: Added a custom iASL macro __EXPECT__(iASL-Error-Code). This macro
355 can be used anywhere in a given ASL file to configure iASL to expect an
356 iASL compiler error code on the line where this macro was placed. If the
357 error code does not exist, an error is generated. This is intended to be
358 used for ACPICA's ASL test suite, but can be used by ASL developers as
361 iASL: table compiler: Implemented IVRS IVHD type 11h parsing. The AMD
362 IVRS table parsing supported only IVHD type 10h structures. Parsing an
363 IVHD type 11h caused the iasl to report unknown subtable type. Add
364 necessary structure definition for IVHD type 11h and apply correct
365 parsing method based on subtable type. Micha? ?ygowski.
367 iASL: table compiler: Fixed IVRS table IVHD type 10h reserved field name
368 According to AMD IOMMU Specification Revision 3.05 the reserved field
369 should be IOMMU Feature Reporting. Change the name of the field to the
370 correct one. Micha? ?ygowski.
372 acpiexec: removed redeclaration of AcpiGbl_DbOpt_NoRegionSupport. Patch
373 based on suggestions by David Seifert and Benjamin Berg.
375 iASL: table compiler: removed an unused variable (DtCompilerParserResult)
376 causing linking errors. Patch based on suggestions by David Seifert and
379 iASL: table compiler: make LexBuffer static to avoid linking errors in
380 newer compilers. Patch based on suggestions by David Seifert and Benjamin
383 iASL: fixed type matching between External and Named objects. External
384 object types can only be expressed with ACPI object type values that are
385 defined in the ACPI spec. However, iASL uses ACPI object type values that
386 are local to ACPICA in addition to the values defined in the ACPI spec.
387 This change implements type matching to map some object type values
388 specific to ACPICA to ones that are defined in the ACPI spec.
390 iASL: Dropped the type mismatch compiler error that can arise from
391 External declarations to a warning. This warning can occur when there is
392 a type difference between the external declaration and the actual object
393 declaration (when compiling multiple files/modules simultaneously).
395 iASL: removed an incorrect error message regarding externals. This change
396 removes an incorrect error that is emitted when a duplicate external
397 declaration does not contain a type that opens a scope. This is incorrect
398 because the duplicate external with conflicting types are already caught
399 by iASL and it doesn't make any sense to enforce what this conflicting
402 AcpiXtract: fix AX_IS_TABLE_BLOCK_HEADER macro. This macro needs to be
403 surrounded by parens. Otherwise, a logical statement that applies a
404 logical not operator to this macro could result in a computation that
405 applies the operator to the left side of the logical and but not the
406 right. Reported-by: John Levon <john.levon@joyent.com>
408 Fixed a problem with the local version of sprint(): On 32-bit, the
409 provided sprintf() is non-functional: with a size of ACPI_UINT32_MAX,
410 String + Size will wrap, meaning End < Start, and
411 AcpiUtBoundStringOutput() will never output anything as a result. The
412 symptom seen of this was acpixtract failing to output anything -- with a
413 custom build that included utprint.c. Signed-off-by: John Levon
414 <john.levon@joyent.com>
416 iASL: Changed the "PlatformCommChannel" ASL keyword to "PCC", as per the
420 ----------------------------------------
421 14 February 2020. Summary of changes for version 20200214:
424 1) ACPICA kernel-resident subsystem:
426 Enable sleep button on ACPI legacy wake: Hibernation (S4) is triggered
427 in a guest when it receives a sleep trigger from the hypervisor. When the
428 guest resumes from this power state, it does not see the SleepEnabled
429 bit. In other words, the sleepHibernation (S4) is triggered in a guest
430 when it receives a sleep trigger from the hypervisor. When the guest
431 resumes from this power state, it does not see the SleepEnabled bit. In
432 other words, the sleep button is not enabled on waking from an S4 state.
433 This causes subsequent invocation of sleep state to fail since the
434 guest.button is not enabled on waking from an S4 state. This causes
435 subsequent invocation of sleep state to fail in the guest. Fix this
436 problem by enabling the sleep button in ACPI legacy wake. From Anchal
437 Agarwal <anchalag@amazon.com>.
439 Implemented a new external interface, AcpiAnyGpeStatusSet (). To be used
440 for checking the status bits of all enabled GPEs in one go. It is needed
441 to distinguish spurious SCIs from genuine ones when deciding whether or
442 not to wake up the system from suspend-to-idle.
444 Generic Makefiles: replace HOST name with ACPI_HOST: Some machines may be
445 using HOST in their environment to represent the host name for their
446 machines. Avoid this problem by renaming this variable from HOST to
449 MSVC 2017 project files: Enable multiprocessor generation to improve
452 Added a macro to get the byte width of a Generic Address structure. New
453 ACPI_ACCESS_BYTE_WIDTH is in addition to the existing
454 ACPI_ACCESS_BIT_WIDTH. From Mika Westerberg.
457 2) iASL Compiler/Disassembler and ACPICA tools:
459 iASL: Implemented full support for the (optional, rarely used) ReturnType
460 and ParameterTypesList for the Method, Function, and External operators.
461 For Method declarations, the number of individual ParameterTypes must
462 match the declaration of the number of arguments (NumArgs). This also
463 Fixes a problem with the External operator where extra/extraneous bytes
464 were emitted in the AML code if the optional ReturnType/ParameterTypes
465 were specified for a MethodObj declaration.
467 1) Method NumArgs count does not match length of ParameterTypes list
469 iASL: Implemented detection of type mismatches between External
470 declarations and named object declarations. Also, detect type mismatches
471 between multiple External declarations of the same Name.
473 1) Type mismatch between external declaration and actual object
475 2) Type mismatch between multiple external declarations detected
477 iASL: Implemented new error messages for External operators that specify
478 a ReturnType and/or ParameterTypesList for any object type other than
479 control methods (MethodObj).
481 1) Return type is only allowed for Externals declared as MethodObj
482 2) Parameter type is only allowed for Externals declared as MethodObj
484 iASL: Implemented two new remark/warning messages for ASL code that
485 creates named objects from within a control method. This is very
486 inefficient since the named object must be created and deleted each time
487 the method is executed.
489 1) Creation of named objects within a method is highly inefficient, use
490 globals or method local variables instead (remark)
491 2) Static OperationRegion should be declared outside control method
494 iASL: Improved illegal forward reference detection by adding support to
495 detect forward-reference method invocations.
497 iASL: Detect and issue an error message for NameStrings that contain too
498 many individual NameSegs (>255). This is an AML limitation that is
499 defined in the ACPI specification.
501 1) NameString contains too many NameSegs (>255)
503 acpidump: windows: use GetSystemFirmwareTable API for all tables except
504 SSDT. By using this API, acpidump is able to get all tables in the XSDT
506 iASL: Removed unused parser file and updated msvc2017 project files.
507 Removed the obsolete AslCompiler.y from the repository.
509 iASL: msvc2017: Fixed macros in the file dependency list to prevent
510 unnecessary rebuilds. Replace %(Directory) with %(RelativeDir).
512 Disassembler: Prevent spilling error messages to the output file. All
513 errors are directed to the console instead. These error messages
514 prevented re-compilation of the resulting disassembled ASL output file
518 ----------------------------------------
519 10 January 2020. Summary of changes for version 20200110:
522 1) ACPICA kernel-resident subsystem:
524 Updated all copyrights to 2020. This affects all ACPICA source code
528 2) iASL Compiler/Disassembler and ACPICA tools:
530 ASL test suite (ASLTS): Updated all copyrights to 2020.
532 Tools and utilities: Updated all signon copyrights to 2020.
534 iASL: fix forward reference analysis for field declarations. Fixes
535 forward reference analysis for field declarations by searching the
536 parent scope for the named object when the object is not present in
539 iASL: Improved the error output for ALREADY_EXISTS errors. Now, the
540 full pathname of the name that already exists is printed.
542 iASL: Enhance duplicate Case() detection for buffers. Add check for
543 buffers with no initializer list (these buffers will be filled with
547 ----------------------------------------
548 13 December 2019. Summary of changes for version 20191213:
551 1) ACPICA kernel-resident subsystem:
553 Return a Buffer object for all fields created via the CreateField
554 operator. Previously, an Integer would be returned if the size of
555 the field was less than or equal to the current size of an Integer.
556 Although this goes against the ACPI specification, it provides
557 compatibility with other ACPI implementations. Also updated the
558 ASLTS test suite to reflect this new behavior.
560 2) iASL Compiler/Disassembler and ACPICA tools:
562 iASL: Implemented detection of (and throw an error for) duplicate
563 values for Case statements within a single Switch statement. Duplicate
564 Integers, Strings, and Buffers are supported.
566 iASL: Fix error logging issue during multiple file compilation --
567 Switch to the correct input file during error node creation.
569 iASL: For duplicate named object creation, now emit an error instead
570 of a warning - since this will cause a runtime error.
572 AcpiSrc: Add unix line-ending support for non-Windows builds.
574 iASL: Add an error condition for an attempt to create a NameString
575 with > 255 NameSegs (the max allowable via the AML definition).
578 ----------------------------------------
579 18 October 2019. Summary of changes for version 20191018:
582 1) ACPICA kernel-resident subsystem:
584 Debugger: added a new command: ?Fields [address space ID]?. This command
585 dumps the contents of all field units that are defined within the
586 namespace with a particular address space ID.
588 Modified the external interface AcpiLoadTable() to return a table index.
589 This table index can be used for unloading a table for debugging.
592 ACPI_TABLE_HEADER *Table,
595 Implemented a new external interface: AcpiUnloadTable() This new function
596 takes a table index as an argument and unloads the table. Useful for
602 Ported the AcpiNames utility to use the new table initialization
603 sequence. The utility was broken before this change. Also, it was
604 required to include most of the AML interpreter into the utility in order
605 to process table initialization (module-level code execution.)
607 Update for results from running Clang V8.0.1. This fixes all "dead
608 assignment" warnings. There are still several "Dereference of NULL
609 pointer" warnings, but these have been found to be false positive
613 2) iASL Compiler/Disassembler and ACPICA tools:
615 iASL: numerous table compiler changes to ensure that the usage of
616 yacc/bison syntax is POSIX-compliant.
618 iASL/disassembler: several simple bug fixes in the data table
621 Acpiexec: expanded the initialization file (the -fi option) to initialize
622 strings, buffers, packages, and field units.
625 ----------------------------------------
626 16 August 2019. Summary of changes for version 20190816:
628 This release is available at https://acpica.org/downloads
631 1) ACPICA kernel-resident subsystem:
633 Modified the OwnerId mechanism to allow for more Owner Ids. The previous
634 limit was 256 Ids, now it is 4096 Ids. This prevents OWNER_ID_LIMIT
635 exceptions on machines with a large number of initialization threads,
636 many CPU cores and nested initialization control methods.
638 Introduced acpi_dispatch_gpe() as a wrapper around AcpiEvDetectGpe() for
639 checking if the given GPE (as represented by a GPE device handle and a
640 GPE number) is currently active and dispatching it (if that's the case)
641 outside of interrupt context.
643 Table load: exit the interpreter before initializing objects within the
644 new table This prevents re-acquiring the interpreter lock when loading
647 Added the "Windows 2019" string to the _OSI support (version 1903). Jung-
650 Macros: removed pointer math on a null pointer. Causes warnings on some
651 compilers and/or tools. Changed ACPI_TO_POINTER to use ACPI_CAST_PTR
652 instead of using arithmetic.
654 Fully deployed the ACPI_PRINTF_LIKE macro. This macro was not being used
655 across all "printf-like" internal functions. Also, cleanup all calls to
656 such functions (both in 32-bit mode and 64-bit mode) now that they are
657 analyzed by the gcc compiler via ACPI_PRINTF_LIKE.
660 2) iASL Compiler/Disassembler and ACPICA tools:
662 iASL: implemented a new data table compiler flex/bison front-end. This
663 change is internal and is not intended to result in changes to the
664 compiled code. This new compiler front-end can be invoked using the -tp
665 option for now, until the old mechanism is removed.
667 ASLTS: Implemented a new data table compiler test suite. This test suite
668 generates all table templates and compile/disassemble/re-compile/binary-
671 iASL: return -1 if AML files were not generated due to compiler errors
673 iASL: added a warning on use of the now-legacy ASL Processor () keyword.
675 iASL: added an error on _UID object declaration that returns a String
676 within a Processor () declaration. A _UID for a processor must be an
679 iASL: added a null terminator to name strings that consist only of
680 multiple parent prefixes (^)
682 iASL: added support to compile both ASL and data table files in a single
685 Updated the tool generation project files that were recently migrated to
686 MSVC 2017 to eliminate all new warnings. The new project files appear in
687 the directory \acpica\generate\msvc2017. This change effectively
688 deprecates the older project files in \acpica\generate\msvc9.
691 ----------------------------------------
692 03 July 2019. Summary of changes for version 20190703:
695 1) ACPICA kernel-resident subsystem:
697 Remove legacy module-level support code. There were still some remnants
698 of the legacy module-level code executions. Since we no longer support
699 this option, this is essentially dead code and has been removed from the
702 iASL: ensure that _WAK, _PTS, _TTS, and _Sx are declared only at the root
703 scope. If these named objects are declared outside the root scope, they
704 will not be invoked by any host Operating System.
706 Clear status of GPEs on first direct enable. ACPI GPEs (other than the EC
707 one) can be enabled in two situations. First, the GPEs with existing _Lxx
708 and _Exx methods are enabled implicitly by ACPICA during system
709 initialization. Second, the GPEs without these methods (like GPEs listed
710 by _PRW objects for wakeup devices) need to be enabled directly by the
711 code that is going to use them (e.g. ACPI power management or device
714 In the former case, if the status of a given GPE is set to start with,
715 its handler method (either _Lxx or _Exx) needs to be invoked to take care
716 of the events (possibly) signaled before the GPE was enabled. In the
717 latter case, however, the first caller of AcpiEnableGpe() for a given GPE
718 should not be expected to care about any events that might be signaled
719 through it earlier. In that case, it is better to clear the status of
720 the GPE before enabling it, to prevent stale events from triggering
721 unwanted actions (like spurious system resume, for example).
723 For this reason, modify AcpiEvAddGpeReference() to take an additional
724 boolean argument indicating whether or not the GPE status needs to be
725 cleared when its reference counter changes from zero to one and make
726 AcpiEnableGpe() pass TRUE to it through that new argument.
729 2) iASL Compiler/Disassembler and ACPICA tools:
731 The tool generation process has been migrated to MSVC 2017, and all
732 project files have been upgraded. The new project files appear in the
733 directory \acpica\generate\msvc2017. This change effectively deprecates
734 the older project files in \acpica\generate\msvc9.
736 iASL: ensure that _WAK, _PTS, _TTS, and _Sx are declared only at the root
737 scope. If these named objects are declared outside the root scope, they
738 will not be invoked by any host Operating System
740 ----------------------------------------
741 09 May 2019. Summary of changes for version 20190509:
744 1) ACPICA kernel-resident subsystem:
746 Revert commit 6c43e1a ("ACPICA: Clear status of GPEs before enabling
747 them") that causes problems with Thunderbolt controllers to occur if a
748 dock device is connected at init time (the xhci_hcd and thunderbolt
749 modules crash which prevents peripherals connected through them from
750 working). Commit 6c43e1a effectively causes commit ecc1165b8b74 ("ACPICA:
751 Dispatch active GPEs at init time") to get undone, so the problem
752 addressed by commit ecc1165b8b74 appears again as a result of it.
755 2) iASL Compiler/Disassembler and ACPICA tools:
757 Reverted iASL: Additional forward reference detection. This change
758 reverts forward reference detection for field declarations. The feature
759 unintentionally emitted AML bytecode with incorrect package lengths for
760 some ASL code related to Fields and OperationRegions. This malformed AML
761 can cause systems to crash
762 during boot. The malformed AML bytecode is emitted in iASL version
763 20190329 and 20190405.
765 iASL: improve forward reference detection. This change improves forward
766 reference detection for named objects inside of scopes. If a parse object
767 has the OP_NOT_FOUND_DURING_LOAD set, it means that Op is a reference to
768 a named object that is declared later in the AML bytecode. This is
769 allowed if the reference is inside of a method and the declaration is
770 outside of a method like so:
781 However, if the declaration and reference are both in the same method or
782 outside any methods, this is a forward reference and should be marked as
783 an error because it would result in runtime errors.
787 Name (BUFF, Buffer (NUM0) {}) // Forward reference
793 Name (NUM1, 0x1) // Forward reference
798 iASL: Implemented additional buffer overflow analysis for BufferField
799 declarations. Check if a buffer index argument to a create buffer field
800 operation is beyond the end of the target buffer.
802 This affects these AML operators:
805 AML_CREATE_BIT_FIELD_OP
806 AML_CREATE_BYTE_FIELD_OP
807 AML_CREATE_WORD_FIELD_OP
808 AML_CREATE_DWORD_FIELD_OP
809 AML_CREATE_QWORD_FIELD_OP
811 There are three conditions that must be satisfied in order to allow this
812 validation at compile time:
814 1) The length of the target buffer must be an integer constant
815 2) The index specified in the create* must be an integer constant
816 3) For CreateField, the bit length argument must be non-zero.
819 Name (BUF1, Buffer() {1,2})
820 CreateField (BUF1, 7, 9, CF03) // 3: ERR
822 dsdt.asl 14: CreateField (BUF1, 7, 9, CF03) // 3: ERR
823 Error 6165 - ^ Buffer index beyond end of
827 ----------------------------------------
828 05 April 2019. Summary of changes for version 20190405:
831 1) ACPICA kernel-resident subsystem:
833 Event Manager: History: Commit 18996f2db918 ("ACPICA: Events: Stop
834 unconditionally clearing ACPI IRQs during suspend/resume") was added
835 earlier to stop clearing of event status bits unconditionally on suspend
836 and resume paths. Though this change fixed an issue on suspend path, it
837 introduced regressions on several resume paths. In the case of S0ix,
838 events are enabled as part of device suspend path. If status bits for the
839 events are set when they are enabled, it could result in premature wake
840 from S0ix. If status is cleared for any event that is being enabled so
841 that any stale events are cleared out. In case of S0ix, events are
842 enabled as part of device suspend path. If status bits for the events are
843 set when they are enabled, it could result in premature wake from S0ix.
845 This change ensures that status is cleared for any event that is being
846 enabled so that any stale events are cleared out.
849 2) iASL Compiler/Disassembler and ACPICA tools:
851 iASL: Implemented an enhanced multiple file compilation that combines
852 named objects from all input files to a single namespace. With this
853 feature, any unresolved external declarations as well as duplicate named
854 object declarations can be detected during compilation rather than
855 generating errors much later at runtime. The following commands are
856 examples that utilize this feature:
857 iasl dsdt.asl ssdt.asl
858 iasl dsdt.asl ssdt1.asl ssdt2.asl
859 iasl dsdt.asl ssdt*.asl
861 ----------------------------------------
862 29 March 2019. Summary of changes for version 20190329:
865 1) ACPICA kernel-resident subsystem:
867 Namespace support: Remove the address nodes from global list after method
868 termination. The global address list contains pointers to namespace nodes
869 that represent Operation Regions. This change properly removes Operation
870 Region namespace nodes that are declared dynamically during method
873 Linux: Use a different debug default than ACPICA. There was a divergence
874 between Linux and the ACPICA codebases. In order to resolve this
875 divergence, Linux now declares its own debug default in aclinux.h
877 Renamed some internal macros to improve code understanding and
878 maintenance. The macros below all operate on single 4-character ACPI
879 NameSegs, not generic strings (old -> new):
880 ACPI_NAME_SIZE -> ACPI_NAMESEG_SIZE
881 ACPI_COMPARE_NAME -> ACPI_COMPARE_NAMESEG
882 ACPI_MOVE_NAME -> ACPI_COPY_NAMESEG
884 Fix for missing comma in array declaration for the AcpiGbl_GenericNotify
887 Test suite: Update makefiles, add PCC operation region support
890 2) iASL Compiler/Disassembler and Tools:
892 iASL: Implemented additional illegal forward reference detection. Now
893 detect and emit an error upon detection of a forward reference from a
894 Field to an Operation Region. This will fail at runtime if allowed to
897 AcpiExec: Add an address list check for dynamic Operation Regions. This
898 feature performs a sanity test for each node the global address list.
899 This is done in order to ensure that all dynamic operation regions are
900 properly removed from the global address list and no dangling pointers
903 Disassembler: Improved generation of resource pathnames. This change
904 improves the code that generates resource descriptor and resource tag
905 pathnames. The original code used a bunch of str* C library functions
906 that caused warnings on some compilers.
908 iASL: Removed some uses of strncpy and replaced with memmove. The strncpy
909 function can overwrite buffers if the calling code is not very careful.
910 In the case of generating a module/table header, use of memmove is a
911 better implementation.
914 3) Status of new features that have not been completed at this time:
916 iASL: Implementing an enhanced multiple file compilation into a single
917 namespace feature (Status): This feature will be released soon, and
918 allows multiple ASL files to be compiled into the same single namespace.
919 By doing so, any unresolved external declarations as well as duplicate
920 named object declarations can be detected during compilation (rather than
921 later during runtime). The following commands are examples that utilize
923 iasl dsdt.asl ssdt.asl
924 iasl dsdt.asl ssdt1.asl ssdt2.asl
925 iasl dsdt.asl ssdt*.asl
927 ASL tutorial status: Feedback is being gathered internally and the
928 current plan is to publish this tutorial on the ACPICA website after a
929 final review by a tech writer.
931 ----------------------------------------
932 15 February 2019. Summary of changes for version 20190215:
935 0) Support for ACPI specification version 6.3:
937 Add PCC operation region support for the AML interpreter. This adds PCC
938 operation region support in the AML interpreter and a default handler for
939 acpiexec. The change also renames the PCC region address space keyword to
942 Support for new predefined methods _NBS, _NCH, _NIC, _NIH, and _NIG.
943 These methods provide OSPM with health information and device boot
946 PDTT: Add TriggerOrder to the PCC Identifier structure. The field value
947 defines if the trigger needs to be invoked by OSPM before or at the end
948 of kernel crash dump processing/handling operation.
950 SRAT: Add Generic Affinity Structure subtable. This subtable in the SRAT
951 is used for describing devices such as heterogeneous processors,
952 accelerators, GPUs, and IO devices with integrated compute or DMA
955 MADT: Add support for statistical profiling in GICC. Statistical
956 profiling extension (SPE) is an architecture-specific feature for ARM.
958 MADT: Add online capable flag. If this bit is set, system hardware
959 supports enabling this processor during OS runtime.
961 New Error Disconnect Recover Notification value. There are a number of
962 scenarios where system Firmware in collaboration with hardware may
963 disconnect one or more devices from the rest of the system for purposes
964 of error containment. Firmware can use this new notification value to
965 alert OSPM of such a removal.
967 PPTT: New additional fields in Processor Structure Flags. These flags
968 provide more information about processor topology.
970 NFIT/Disassembler: Change a field name from "Address Range" to "Region
973 HMAT updates: make several existing fields to be reserved as well as
974 rename subtable 0 to "memory proximity domain attributes".
976 GTDT: Add support for new GTDT Revision 3. This revision adds information
979 iASL: Update the HMAT example template for new fields.
981 iASL: Add support for the new revision of the GTDT (Rev 3).
984 1) ACPICA kernel-resident subsystem:
986 AML Parser: fix the main AML parse loop to correctly skip erroneous
987 extended opcodes. AML opcodes come in two lengths: 1-byte opcodes and 2-
988 byte extended opcodes. If an error occurs during an AML table load, the
989 AML parser will continue loading the table by skipping the offending
990 opcode. This implements a "load table at any cost" philosophy.
993 2) iASL Compiler/Disassembler and Tools:
995 iASL: Add checks for illegal object references, such as a reference
996 outside of method to an object within a method. Such an object is only
999 iASL: Emit error for creation of a zero-length operation region. Such a
1000 region is rather pointless. If encountered, a runtime error is also
1001 implemented in the interpreter.
1003 Debugger: Fix a possible fault with the "test objects" command.
1005 iASL: Makefile: support parent directory filenames containing embedded
1008 iASL: Update the TPM2 template to revision 4.
1010 iASL: Add the ability to report specific warnings or remarks as errors.
1012 Disassembler: Disassemble OEMx tables as actual AML byte code.
1013 Previously, these tables were treated as "unknown table".
1015 iASL: Add definition and disassembly for TPM2 revision 3.
1017 iASL: Add support for TPM2 rev 3 compilation.
1020 ----------------------------------------
1021 08 January 2019. Summary of changes for version 20190108:
1024 1) ACPICA kernel-resident subsystem:
1026 Updated all copyrights to 2019. This affects all source code modules.
1029 2) iASL Compiler/Disassembler and Tools:
1031 ASL test suite (ASLTS): Updated all copyrights to 2019.
1033 Tools: Updated all signon copyrights to 2019.
1035 AcpiExec: Added a new option to dump extra information concerning any
1036 memory leaks detected by the internal object/cache tracking mechanism. -
1039 iASL: Updated the table template for the TPM2 table to the newest version
1040 of the table (Revision 4)
1043 ----------------------------------------
1044 13 December 2018. Summary of changes for version 20181213:
1047 1) ACPICA Kernel-resident Subsystem:
1049 Fixed some buffer length issues with the GenericSerialBus, related to two
1050 of the bidirectional protocols: AttribRawProcessBytes and AttribRawBytes,
1051 which are rarely seen in the field. For these, the LEN field of the ASL
1052 buffer is now ignored. Hans de Goede
1054 Implemented a new object evaluation trace mechanism for control methods
1055 and data objects. This includes nested control methods. It is
1056 particularly useful for examining the ACPI execution during system
1057 initialization since the output is relatively terse. The flag below
1058 enables the output of the trace via the ACPI_DEBUG_PRINT_RAW interface:
1059 #define ACPI_LV_EVALUATION 0x00080000
1062 Enter evaluation : _SB.PCI0._INI (Method)
1063 Exit evaluation : _SB.PCI0._INI
1064 Enter evaluation : _OSI (Method)
1065 Exit evaluation : _OSI
1066 Enter evaluation : _SB.PCI0.TEST (Method)
1067 Nested method call : _SB.PCI0.NST1
1068 Exit nested method : _SB.PCI0.NST1
1069 Exit evaluation : _SB.PCI0.TEST
1071 Added two recently-defined _OSI strings. See
1072 https://docs.microsoft.com/en-us/windows-hardware/drivers/acpi/winacpi-
1077 Update for buffer-to-string conversions via the ToHexString ASL operator.
1078 A "0x" is now prepended to each of the hex values in the output string.
1079 This provides compatibility with other ACPI implementations. The ACPI
1080 specification is somewhat vague on this issue.
1081 Example output string after conversion:
1082 "0x01,0x02,0x03,0x04,0x05,0x06"
1084 Return a run-time error for TermArg expressions within individual package
1085 elements. Although this is technically supported by the ASL grammar,
1086 other ACPI implementations do not support this either. Also, this fixes a
1087 fault if this type of construct is ever encountered (it never has been).
1090 2) iASL Compiler/Disassembler and Tools:
1092 iASL: Implemented a new compile option (-ww) that will promote individual
1093 warnings and remarks to errors. This is intended to enhance the firmware
1096 AcpiExec: Implemented a new command-line option (-eo) to support the new
1097 object evaluation trace mechanism described above.
1099 Disassembler: Added support to disassemble OEMx tables as AML/ASL tables
1100 instead of a "unknown table" message.
1102 AcpiHelp: Improved support for the "special" predefined names such as
1103 _Lxx, _Exx, _EJx, _T_x, etc. For these, any legal hex value can now be
1104 used for "xx" and "x".
1106 ----------------------------------------
1107 31 October 2018. Summary of changes for version 20181031:
1110 An Operation Region regression was fixed by properly adding address
1111 ranges to a global list during initialization. This allows OS to
1112 accurately check for overlapping regions between native devices (such as
1113 PCI) and Operation regions as well as checking for region conflicts
1114 between two Operation Regions.
1116 Added support for the 2-byte extended opcodes in the code/feature that
1117 attempts to continue parsing during the table load phase. Skip parsing
1118 Device declarations (and other extended opcodes) when an error occurs
1119 during parsing. Previously, only single-byte opcodes were supported.
1121 Cleanup: Simplified the module-level code support by eliminating a
1122 useless global variable (AcpiGbl_GroupModuleLeveCode).
1125 2) iASL Compiler/Disassembler and Tools:
1127 iASL/Preprocessor: Fixed a regression where an incorrect use of ACPI_FREE
1128 could cause a fault in the preprocessor. This was an inadvertent side-
1129 effect from moving more allocations/frees to the local cache/memory
1132 iASL: Enhanced error detection by validating that all NameSeg elements
1133 within a NamePatch actually exist. The previous behavior was spotty at
1134 best, and such errors could be improperly ignored at compiler time (never
1135 at runtime, however. There are two new error messages, as shown in the
1138 dsdt.asl 33: CreateByteField (TTTT.BXXX, 1, CBF1)
1139 Error 6161 - ^ One or more objects within
1140 the Pathname do not exist (TTTT.BXXX)
1142 dsdt.asl 34: CreateByteField (BUF1, UUUU.INT1, BBBB.CBF1)
1143 Error 6160 - One or more prefix Scopes do not exist ^
1146 iASL: Disassembler/table-compiler: Added support for the static data
1147 table TPM2 revision 3 (an older version of TPM2). The support has been
1148 added for the compiler and the disassembler.
1150 Fixed compilation of DOS format data table file on Unix/Linux systems.
1151 iASL now properly detects line continuations (\) for DOS format data
1152 table definition language files on when executing on Unix/Linux.
1154 ----------------------------------------
1155 03 October 2018. Summary of changes for version 20181003:
1158 2) iASL Compiler/Disassembler and Tools:
1160 Fixed a regression introduced in version 20180927 that could cause the
1161 compiler to fault, especially with NamePaths containing one or more
1162 carats (^). Such as: ^^_SB_PCI0
1164 Added a new remark for the Sleep() operator when the sleep time operand
1165 is larger than one second. This is a very long time for the ASL/BIOS code
1166 and may not be what was intended by the ASL writer.
1168 ----------------------------------------
1169 27 September 2018. Summary of changes for version 20180927:
1172 1) ACPICA kernel-resident subsystem:
1174 Updated the GPE support to clear the status of all ACPI events when
1175 entering any/all sleep states in order to avoid premature wakeups. In
1176 theory, this may cause some wakeup events to be missed, but the
1177 likelihood of this is small. This change restores the original behavior
1178 of the ACPICA code in order to fix a regression seen from the previous
1179 "Stop unconditionally clearing ACPI IRQs during suspend/resume" change.
1180 This regression could cause some systems to incorrectly wake immediately.
1182 Updated the execution of the _REG methods during initialization and
1183 namespace loading to bring the behavior into closer conformance to the
1184 ACPI specification and other ACPI implementations:
1186 From the ACPI specification 6.2A, section 6.5.4 "_REG (Region):
1187 "Control methods must assume all operation regions are inaccessible
1188 until the _REG(RegionSpace, 1) method is executed"
1190 "The exceptions to this rule are:
1191 1. OSPM must guarantee that the following operation regions are always
1193 SystemIO operation regions.
1194 SystemMemory operation regions when accessing memory returned by the
1195 System Address Map reporting interfaces."
1197 Since the state of both the SystemIO and SystemMemory address spaces are
1198 defined by the specification to never change, this ACPICA change ensures
1199 that now _REG is never called on them. This solves some problems seen in
1200 the field and provides compatibility with other ACPI implementations. An
1201 update to the upcoming new version of the ACPI specification will help
1202 clarify this behavior.
1204 Updated the implementation of support for the Generic Serial Bus. For the
1205 "bidirectional" protocols, the internal implementation now automatically
1206 creates a return data buffer of the maximum size (255). This handles the
1207 worst-case for data that is returned from the serial bus handler, and
1208 fixes some problems seen in the field. This new buffer is directly
1209 returned to the ASL. As such, there is no true "bidirectional" buffer,
1210 which matches the ACPI specification. This is the reason for the "double
1211 store" seen in the example ASL code in the specification, shown below:
1213 Word Process Call (AttribProcessCall):
1214 OperationRegion(TOP1, GenericSerialBus, 0x00, 0x100)
1215 Field(TOP1, BufferAcc, NoLock, Preserve)
1217 FLD1, 8, // Virtual register at command value 1.
1220 Name(BUFF, Buffer(20){}) // Create GenericSerialBus data buffer
1222 CreateWordField(BUFF, 0x02, DATA) // DATA = Data (Word)
1224 Store(0x5416, DATA) // Save 0x5416 into the data buffer
1225 Store(Store(BUFF, FLD1), BUFF) // Invoke a write/read Process Call
1227 // This is the "double store". The write to
1228 // FLD1 returns a new buffer, which is stored
1229 // back into BUFF with the second Store.
1232 2) iASL Compiler/Disassembler and Tools:
1234 iASL: Implemented detection of extraneous/redundant uses of the Offset()
1235 operator within a Field Unit list. A remark is now issued for these. For
1236 example, the first two of the Offset() operators below are extraneous.
1237 Because both the compiler and the interpreter track the offsets
1238 automatically, these Offsets simply refer to the current offset and are
1239 unnecessary. Note, when optimization is enabled, the iASL compiler will
1240 in fact remove the redundant Offset operators and will not emit any AML
1243 OperationRegion (OPR1, SystemMemory, 0x100, 0x100)
1246 Offset (0), // Never needed
1248 Offset (4), // Redundant, offset is already 4 (bytes)
1250 Offset (64), // OK use of Offset.
1253 dsdt.asl 14: Offset (0),
1254 Remark 2158 - ^ Unnecessary/redundant use of Offset
1257 dsdt.asl 16: Offset (4),
1258 Remark 2158 - ^ Unnecessary/redundant use of Offset
1261 ----------------------------------------
1262 10 August 2018. Summary of changes for version 20180810:
1265 1) ACPICA kernel-resident subsystem:
1267 Initial ACPI table loading: Attempt to continue loading ACPI tables
1268 regardless of malformed AML. Since migrating table initialization to the
1269 new module-level code support, the AML interpreter rejected tables upon
1270 any ACPI error encountered during table load. This is a problem because
1271 non-serious ACPI errors during table load do not necessarily mean that
1272 the entire definition block (DSDT or SSDT) is invalid. This change
1273 improves the table loading by ignoring some types of errors that can be
1274 generated by incorrect AML. This can range from object type errors, scope
1275 errors, and index errors.
1277 Suspend/Resume support: Update to stop unconditionally clearing ACPI IRQs
1278 during suspend/resume. The status of ACPI events is no longer cleared
1279 when entering the ACPI S5 system state (power off) which caused some
1280 systems to power up immediately after turning off power in certain
1281 situations. This was a functional regression. It was fixed by clearing
1282 the status of all ACPI events again when entering S5 (for system-wide
1283 suspend or hibernation the clearing of the status of all events is not
1284 desirable, as it might cause the kernel to miss wakeup events sometimes).
1288 2) iASL Compiler/Disassembler and Tools:
1290 AcpiExec: Enhanced the -fi option (Namespace initialization file). Field
1291 elements listed in the initialization file were previously initialized
1292 after the table load and before executing module-level code blocks.
1293 Recent changes in the module-level code support means that the table load
1294 becomes a large control method execution. If fields are used within
1295 module-level code and we are executing with the -fi option, the
1296 initialization values were used to initialize the namespace object(s)
1297 only after the table was finished loading. This change Provides an early
1298 initialization of objects specified in the initialization file so that
1299 field unit values are populated during the table load (not after the
1302 AcpiExec: Fixed a small memory leak regression that could result in
1303 warnings during exit of the utility. These warnings were similar to
1305 0002D690 Length 0x0006 nsnames-0502 [Not a Descriptor - too small]
1306 0002CD70 Length 0x002C utcache-0453 [Operand] Integer RefCount 0x0001
1308 ----------------------------------------
1309 29 June 2018. Summary of changes for version 20180629:
1312 1) iASL Compiler/Disassembler and Tools:
1314 iASL: Fixed a regression related to the use of the ASL External
1315 statement. Error checking for the use of the External() statement has
1316 been relaxed. Previously, a restriction on the use of External meant that
1317 the referenced named object was required to be defined in a different
1318 table (an SSDT). Thus it would be an error to declare an object as an
1319 external and then define the same named object in the same table. For
1321 DefinitionBlock (...)
1324 Device (DEV1){...} // This was an error
1326 However, this behavior has caused regressions in some existing ASL code,
1327 because there is code that depends on named objects and externals (with
1328 the same name) being declared in the same table. This change will allow
1329 the ASL code above to compile without errors or warnings.
1331 iASL: Implemented ASL language extensions for four operators to make some
1332 of their arguments optional instead of required:
1333 1) Field (RegionName, AccessType, LockRule, UpdateRule)
1334 2) BankField (RegionName, BankName, BankValue,
1335 AccessType, LockRule, UpdateRule)
1336 3) IndexField (IndexName, DataName,
1337 AccessType, LockRule, UpdateRule)
1338 For the Field operators above, the AccessType, LockRule, and UpdateRule
1339 are now optional arguments. The default values are:
1342 UpdateRule: Preserve
1343 4) Mutex (MutexName, SyncLevel)
1344 For this operator, the SyncLevel argument is now optional. This argument
1345 is rarely used in any meaningful way by ASL code, and thus it makes sense
1346 to make it optional. The default value is:
1349 iASL: Attempted use of the ASL Unload() operator now results in the
1351 "Unload is not supported by all operating systems"
1352 This is in fact very true, and the Unload operator may be completely
1353 deprecated in the near future.
1355 AcpiExec: Fixed a regression for the -fi option (Namespace initialization
1356 file. Recent changes in the ACPICA module-level code support altered the
1357 table load/initialization sequence . This means that the table load has
1358 become a large method execution of the table itself. If Operation Region
1359 Fields are used within any module-level code and the -fi option was
1360 specified, the initialization values were populated only after the table
1361 had completely finished loading (and thus the module-level code had
1362 already been executed). This change moves the initialization of objects
1363 listed in the initialization file to before the table is executed as a
1364 method. Field unit values are now initialized before the table execution
1367 ----------------------------------------
1368 31 May 2018. Summary of changes for version 20180531:
1371 1) ACPICA kernel-resident Subsystem:
1373 Implemented additional support to help ensure that a DSDT or SSDT is
1374 fully loaded even if errors are incurred during the load. The majority of
1375 the problems that are seen is the failure of individual AML operators
1376 that occur during execution of any module-level code (MLC) existing in
1377 the table. This support adds a mechanism to abort the current ASL
1378 statement (AML opcode), emit an error message, and to simply move on to
1379 the next opcode -- instead of aborting the entire table load. This is
1380 different than the execution of a control method where the entire method
1381 is aborted upon any error. The goal is to perform a very "best effort" to
1382 load the ACPI tables. The most common MLC errors that have been seen in
1383 the field are direct references to unresolved ASL/AML symbols (referenced
1384 directly without the use of the CondRefOf operator to validate the
1385 symbol). This new ACPICA behavior is now compatible with other ACPI
1388 Interpreter: The Unload AML operator is no longer supported for the
1389 reasons below. An AE_NOT_IMPLEMENTED exception is returned.
1390 1) A correct implementation on at least some hosts may not be possible.
1391 2) Other ACPI implementations do not correctly/fully support it.
1392 3) It requires host device driver support which is not known to exist.
1393 (To properly support namespace unload out from underneath.)
1394 4) This AML operator has never been seen in the field.
1396 Parser: Added a debug option to dump AML parse sub-trees as they are
1397 being executed. Used with ACPI_DEBUG_PRINT, the enabling debug level is
1398 ACPI_DB_PARSE_TREES.
1400 Debugger: Reduced the verbosity for errors incurred during table load and
1401 module-level code execution.
1403 Completed an investigation into adding a namespace node "owner list"
1404 instead of the current "owner ID" associated with namespace nodes. This
1405 list would link together all nodes that are owned by an individual
1406 control method. The purpose would be to enhance control method execution
1407 by speeding up cleanup during method exit (all namespace nodes created by
1408 a method are deleted upon method termination.) Currently, the entire
1409 namespace must be searched for matching owner IDs if (and only if) the
1410 method creates named objects outside of the local scope. However, by far
1411 the most common case is that methods create objects locally, not outside
1412 the method scope. There is already an ACPICA optimization in place that
1413 only searches the entire namespace in the rare case of a method creating
1414 objects elsewhere in the namespace. Therefore, it is felt that the
1415 overhead of adding an additional pointer to each namespace node to
1416 implement the owner list makes this feature unnecessary.
1419 2) iASL Compiler/Disassembler and Tools:
1421 iASL, Disassembler, and Template generator: Implemented support for
1422 Revision D of the IORT table. Adds a new subtable that is used to specify
1423 SMMUv3 PMCGs. rmurphy-arm.
1425 Disassembler: Restored correct table header validation for the "special"
1426 ACPI tables -- RSDP and FACS. These tables do not contain a standard ACPI
1427 table header and must be special-cased. This was a regression that has
1428 been present for apparently a long time.
1430 AcpiExec: Reduced verbosity of the local exception handler implemented
1431 within acpiexec. This handler is invoked by ACPICA upon any exceptions
1432 generated during control method execution. A new option was added: -vh
1433 restores the original verbosity level if desired.
1435 AcpiExec: Changed the default base from decimal to hex for the -x option
1436 (set debug level). This simplifies the use of this option and matches the
1437 behavior of the corresponding iASL -x option.
1439 AcpiExec: Restored a force-exit on multiple control-c (sigint)
1440 interrupts. This allows program termination even if other issues cause
1441 the control-c to fail.
1443 ASL test suite (ASLTS): Added tests for the recently implemented package
1444 element resolution mechanism that allows forward references to named
1445 objects from individual package elements (this mechanism provides
1446 compatibility with other ACPI implementations.)
1449 ----------------------------------------
1450 8 May 2018. Summary of changes for version 20180508:
1453 1) ACPICA kernel-resident subsystem:
1455 Completed the new (recently deployed) package resolution mechanism for
1456 the Load and LoadTable ASL/AML operators. This fixes a regression that
1457 was introduced in version 20180209 that could result in an
1458 AE_AML_INTERNAL exception during the loading of a dynamic ACPI/AML table
1459 (SSDT) that contains package objects.
1462 2) iASL Compiler/Disassembler and Tools:
1464 AcpiDump and AcpiXtract: Implemented support for ACPI tables larger than
1465 1 MB. This change allows for table offsets within the acpidump file to be
1466 up to 8 characters. These changes are backwards compatible with existing
1470 ----------------------------------------
1471 27 April 2018. Summary of changes for version 20180427:
1474 1) ACPICA kernel-resident subsystem:
1476 Debugger: Added support for Package objects in the "Test Objects"
1477 command. This command walks the entire namespace and evaluates all named
1478 data objects (Integers, Strings, Buffers, and now Packages).
1480 Improved error messages for the namespace root node. Originally, the root
1481 was referred to by the confusing string "\___". This has been replaced by
1482 "Namespace Root" for clarification.
1484 Fixed a potential infinite loop in the AcpiRsDumpByteList function. Colin
1485 Ian King <colin.king@canonical.com>.
1488 2) iASL Compiler/Disassembler and Tools:
1490 iASL: Implemented support to detect and flag illegal forward references.
1491 For compatibility with other ACPI implementations, these references are
1492 now illegal at the root level of the DSDT or SSDTs. Forward references
1493 have always been illegal within control methods. This change should not
1494 affect existing ASL/AML code because of the fact that these references
1495 have always been illegal in the other ACPI implementation.
1497 iASL: Added error messages for the case where a table OEM ID and OEM
1498 TABLE ID strings are longer than the ACPI-defined length. Previously,
1499 these strings were simply silently truncated.
1501 iASL: Enhanced the -tc option (which creates an AML hex file in C,
1502 suitable for import into a firmware project):
1503 1) Create a unique name for the table, to simplify use of multiple
1505 2) Add a protection #ifdef in the file, similar to a .h header file.
1506 With assistance from Sami Mujawar, sami.mujawar@arm.com and Evan Lloyd,
1509 AcpiExec: Added a new option, -df, to disable the local fault handler.
1510 This is useful during debugging, where it may be desired to drop into a
1511 debugger on a fault.
1513 ----------------------------------------
1514 13 March 2018. Summary of changes for version 20180313:
1517 1) ACPICA kernel-resident subsystem:
1519 Implemented various improvements to the GPE support:
1521 1) Dispatch all active GPEs at initialization time so that no GPEs are
1523 2) Enable runtime GPEs earlier. Some systems expect GPEs to be enabled
1524 before devices are enumerated.
1525 3) Don't unconditionally clear ACPI IRQs during suspend/resume, so that
1527 4) Add parallel GPE handling to eliminate the possibility of dispatching
1529 5) Dispatch any pending GPEs after enabling for the first time.
1531 AcpiGetObjectInfo - removed support for the _STA method. This was causing
1532 problems on some platforms.
1534 Added a new _OSI string, "Windows 2017.2".
1536 Cleaned up and simplified the module-level code support. These changes
1537 are in preparation for the eventual removal of the legacy MLC support
1538 (deferred execution), replaced by the new MLC architecture which executes
1539 the MLC as a table is loaded (DSDT/SSDTs).
1541 Changed a compile-time option to a runtime option. Changes the option to
1542 ignore ACPI table load-time package resolution errors into a runtime
1543 option. Used only for platforms that generate many AE_NOT_FOUND errors
1544 during boot. AcpiGbl_IgnorePackageResolutionErrors.
1546 Fixed the ACPI_ERROR_NAMESPACE macro. This change involves putting some
1547 ACPI_ERROR_NAMESPACE parameters inside macros. By doing so, we avoid
1548 compilation errors from unused variables (seen with some compilers).
1551 2) iASL Compiler/Disassembler and Tools:
1553 ASLTS: parallelized execution in order to achieve an (approximately) 2X
1554 performance increase.
1556 ASLTS: Updated to use the iASL __LINE__ and __METHOD__ macros. Improves
1559 ----------------------------------------
1560 09 February 2018. Summary of changes for version 20180209:
1563 1) ACPICA kernel-resident subsystem:
1565 Completed the final integration of the recent changes to Package Object
1566 handling and the module-level AML code support. This allows forward
1567 references from individual package elements when the package object is
1568 declared from within module-level code blocks. Provides compatibility
1569 with other ACPI implementations.
1571 The new architecture for the AML module-level code has been completed and
1572 is now the default for the ACPICA code. This new architecture executes
1573 the module-level code in-line as the ACPI table is loaded/parsed instead
1574 of the previous architecture which deferred this code until after the
1575 table was fully loaded. This solves some ASL code ordering issues and
1576 provides compatibility with other ACPI implementations. At this time,
1577 there is an option to fallback to the earlier architecture, but this
1578 support is deprecated and is planned to be completely removed later this
1581 Added a compile-time option to ignore AE_NOT_FOUND exceptions during
1582 resolution of named reference elements within Package objects. Although
1583 this is potentially a serious problem, it can generate a lot of
1584 noise/errors on platforms whose firmware carries around a bunch of unused
1585 Package objects. To disable these errors, define
1586 ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS in the OS-specific header. All
1587 errors are always reported for ACPICA applications such as AcpiExec.
1589 Fixed a regression related to the explicit type-conversion AML operators
1590 (ToXXXX). The regression was introduced early in 2017 but was not seen
1591 until recently because these operators are not fully supported by other
1592 ACPI implementations and are thus rarely used by firmware developers. The
1593 operators are defined by the ACPI specification to not implement the
1594 "implicit result object conversion". The regression incorrectly
1595 introduced this object conversion for the following explicit conversion
1606 2) iASL Compiler/Disassembler and Tools:
1608 iASL: Fixed a problem with the compiler constant folding feature as
1609 related to the ToXXXX explicit conversion operators. These operators do
1610 not support the "implicit result object conversion" by definition. Thus,
1611 ASL expressions that use these operators cannot be folded to a simple
1612 Store operator because Store implements the implicit conversion. This
1613 change uses the CopyObject operator for the ToXXXX operator folding
1614 instead. CopyObject is defined to not implement implicit result
1615 conversions and is thus appropriate for folding the ToXXXX operators.
1617 iASL: Changed the severity of an error condition to a simple warning for
1618 the case where a symbol is declared both locally and as an external
1619 symbol. This accommodates existing ASL code.
1621 AcpiExec: The -ep option to enable the new architecture for module-level
1622 code has been removed. It is replaced by the -dp option which instead has
1623 the opposite effect: it disables the new architecture (the default) and
1624 enables the legacy architecture. When the legacy code is removed in the
1625 future, the -dp option will be removed also.
1627 ----------------------------------------
1628 05 January 2018. Summary of changes for version 20180105:
1631 1) ACPICA kernel-resident subsystem:
1633 Updated all copyrights to 2018. This affects all source code modules.
1635 Fixed a possible build error caused by an unresolved reference to the
1636 AcpiUtSafeStrncpy function.
1638 Removed NULL pointer arithmetic in the various pointer manipulation
1639 macros. All "(void *) NULL" constructs are converted to "(void *) 0".
1640 This eliminates warnings/errors in newer C compilers. Jung-uk Kim.
1642 Added support for A32 ABI compilation, which uses the ILP32 model. Anuj
1646 2) iASL Compiler/Disassembler and Tools:
1648 ASLTS: Updated all copyrights to 2018.
1650 Tools: Updated all signon copyrights to 2018.
1652 AcpiXtract: Fixed a regression related to ACPI table signatures where the
1653 signature was truncated to 3 characters (instead of 4).
1655 AcpiExec: Restore the original terminal mode after the use of the -v and
1658 ASLTS: Deployed the iASL __METHOD__ macro across the test suite.
1660 ----------------------------------------
1661 14 December 2017. Summary of changes for version 20171214:
1664 1) ACPICA kernel-resident subsystem:
1666 Fixed a regression in the external (public) AcpiEvaluateObjectTyped
1667 interface where the optional "pathname" argument had inadvertently become
1668 a required argument returning an error if omitted (NULL pointer
1671 Fixed two possible memory leaks related to the recently developed "late
1672 resolution" of reference objects within ASL Package Object definitions.
1674 Added two recently defined _OSI strings: "Windows 2016" and "Windows
1675 2017". Mario Limonciello.
1677 Implemented and deployed a safer version of the C library function
1678 strncpy: AcpiUtSafeStrncpy. The intent is to at least prevent the
1679 creation of unterminated strings as a possible result of a standard
1682 Cleaned up and restructured the global variable file (acglobal.h). There
1683 are many changes, but no functional changes.
1686 2) iASL Compiler/Disassembler and Tools:
1688 iASL Table Compiler: Fixed a problem with the DBG2 ACPI table where the
1689 optional OemData field at the end of the table was incorrectly required
1690 for proper compilation. It is now correctly an optional field.
1692 ASLTS: The entire suite was converted from standard ASL to the ASL+
1693 language, using the ASL-to-ASL+ converter which is integrated into the
1694 iASL compiler. A binary compare of all output files has verified the
1695 correctness of the conversion.
1697 iASL: Fixed the source code build for platforms where "char" is unsigned.
1698 This affected the iASL lexer only. Jung-uk Kim.
1700 ----------------------------------------
1701 10 November 2017. Summary of changes for version 20171110:
1704 1) ACPICA kernel-resident subsystem:
1706 This release implements full support for ACPI 6.2A:
1707 NFIT - Added a new subtable, "Platform Capabilities Structure"
1708 No other changes to ACPICA were required, since ACPI 6.2A is primarily an
1709 errata release of the specification.
1711 Other ACPI table changes:
1712 IORT: Added the SMMUv3 Device ID mapping index. Hanjun Guo
1713 PPTT: Added cache attribute flag definitions to actbl1.h. Jeremy
1716 Utilities: Modified the string/integer conversion functions to use
1717 internal 64-bit divide support instead of a native divide. On 32-bit
1718 platforms, a 64-bit divide typically requires a library function which
1719 may not be present in the build (kernel or otherwise).
1721 Implemented a targeted error message for timeouts returned from the
1722 Embedded Controller device driver. This is seen frequently enough to
1723 special-case an AE_TIME returned from an EC operation region access:
1724 "Timeout from EC hardware or EC device driver"
1726 Changed the "ACPI Exception" message prefix to "ACPI Error" so that all
1727 runtime error messages have the identical prefix.
1730 2) iASL Compiler/Disassembler and Tools:
1732 AcpiXtract: Fixed a problem with table header detection within the
1733 acpidump file. Processing a table could be ended early if a 0x40 (@)
1734 appears in the original binary table, resulting in the @ symbol appearing
1735 in the decoded ASCII field at the end of the acpidump text line. The
1736 symbol caused acpixtract to incorrectly think it had reached the end of
1737 the current table and the beginning of a new table.
1739 AcpiXtract: Added an option (-f) to ignore some errors during table
1740 extraction. This initial implementation ignores non-ASCII and non-
1741 printable characters found in the acpidump text file.
1743 TestSuite(ASLTS)/AcpiExec: Fixed and restored the memory usage statistics
1744 for ASLTS. This feature is used to track memory allocations from
1745 different memory caches within the ACPICA code. At the end of an ASLTS
1746 run, these memory statistics are recorded and stored in a log file.
1748 Debugger (user-space version): Implemented a simple "Background" command.
1749 Creates a new thread to execute a control method in the background, while
1750 control returns to the debugger prompt to allow additional commands.
1751 Syntax: Background <Namepath> [Arguments]
1753 ----------------------------------------
1754 29 September 2017. Summary of changes for version 20170929:
1757 1) ACPICA kernel-resident subsystem:
1759 Redesigned and implemented an improved ASL While() loop timeout
1760 mechanism. This mechanism is used to prevent infinite loops in the kernel
1761 AML interpreter caused by either non-responsive hardware or incorrect AML
1762 code. The new implementation uses AcpiOsGetTimer instead of a simple
1763 maximum loop count, and is thus more accurate and constant across
1764 different machines. The default timeout is currently 30 seconds, but this
1765 may be adjusted later.
1767 Renamed the ACPI_AML_INFINITE_LOOP exception to AE_AML_LOOP_TIMEOUT to
1768 better reflect the new implementation of the loop timeout mechanism.
1770 Updated the AcpiGetTimerDuration interface to cleanup the 64-bit support
1771 and to fix an off-by-one error. Jung-uk Kim.
1773 Fixed an EFI build problem by updating the makefiles to for a new file
1774 that was added, utstrsuppt.c
1777 2) iASL Compiler/Disassembler and Tools:
1779 Implemented full support for the PDTT, SDEV, and TPM2 ACPI tables. This
1780 includes support in the table disassembler, compiler, and template
1783 iASL: Added an exception for an illegal type of recursive method
1784 invocation. If a method creates named objects, the first recursive call
1785 will fail at runtime. This change adds an error detection at compile time
1786 to catch the problem up front. Note: Marking such a method as
1787 "serialized" will not help with this problem, because the same thread can
1788 acquire the method mutex more than once. Example compiler and runtime
1797 dsdt.asl 22: MTH1 ()
1798 Error 6152 - ^ Illegal recursive call to method
1799 that creates named objects (MTH1)
1801 Previous runtime exception:
1802 ACPI Error: [INT1] Namespace lookup failure,
1803 AE_ALREADY_EXISTS (20170831/dswload2-465)
1805 iASL: Updated support for External() opcodes to improve namespace
1806 management and error detection. These changes are related to issues seen
1807 with multiple-segment namespace pathnames within External declarations,
1810 External(\_SB.PCI0.GFX0, DeviceObj)
1811 External(\_SB.PCI0.GFX0.ALSI)
1813 iASL: Implemented support for multi-line error/warning messages. This
1814 enables more detailed and helpful error messages as below, from the
1815 initial deployment for the duplicate names error:
1817 DSDT.iiii 1692: Device(PEG2) {
1818 Error 6074 - ^ Name already exists in scope
1821 Original name creation/declaration below:
1822 DSDT.iiii 93: External(\_SB.PCI0.PEG2, DeviceObj)
1824 AcpiXtract: Added additional flexibility to support differing input hex
1825 dump formats. Specifically, hex dumps that contain partial disassembly
1826 and/or comments within the ACPI table data definition. There exist some
1827 dump utilities seen in the field that create this type of hex dump (such
1828 as Simics). For example:
1830 DSDT @ 0xdfffd0c0 (10999 bytes)
1838 Creator_id 1280593481
1839 Creator_revision 537399345
1840 0000: 44 53 44 54 f7 2a 00 00 01 f3 42 58 50 43 00 00
1842 2af0: 5f 4c 30 46 00 a4 01
1844 Test suite: Miscellaneous changes/fixes:
1845 More cleanup and simplification of makefiles
1846 Continue compilation of test cases after a compile failure
1847 Do not perform binary compare unless both files actually exist
1849 iASL: Performed some code/module restructuring. Moved all memory
1850 allocation functions to new modules. Two new files, aslallocate.c and
1853 ----------------------------------------
1854 31 August 2017. Summary of changes for version 20170831:
1857 1) ACPICA kernel-resident subsystem:
1859 Implemented internal support for full 64-bit addresses that appear in all
1860 Generic Address Structure (GAS) structures. Previously, only the lower 32
1861 bits were used. Affects the use of GAS structures in the FADT and other
1862 tables, as well as the GAS structures passed to the AcpiRead and
1863 AcpiWrite public external interfaces that are used by drivers. Lv Zheng.
1865 Added header support for the PDTT ACPI table (Processor Debug Trigger
1866 Table). Full support in the iASL Data Table Compiler and disassembler is
1870 2) iASL Compiler/Disassembler and Tools:
1872 iASL/Disassembler: Fixed a problem with the PPTT ACPI table (Processor
1873 Properties Topology Table) where a flag bit was specified in the wrong
1874 bit position ("Line Size Valid", bit 6).
1876 iASL: Implemented support for Octal integer constants as defined by the
1877 ASL language grammar, per the ACPI specification. Any integer constant
1878 that starts with a zero is an octal constant. For example,
1879 Store (037777, Local0) /* Octal constant */
1880 Store (0x3FFF, Local0) /* Hex equivalent */
1881 Store (16383, Local0) /* Decimal equivalent */
1883 iASL: Improved overflow detection for 64-bit string conversions during
1884 compilation of integer constants. "Overflow" in this case means a string
1885 that represents an integer that is too large to fit into a 64-bit value.
1886 Any 64-bit constants within a 32-bit DSDT or SSDT are still truncated to
1887 the low-order 32 bits with a warning, as previously implemented. Several
1888 new exceptions are defined that indicate a 64-bit overflow, as well as
1889 the base (radix) that was used during the attempted conversion. Examples:
1890 Local0 = 0xAAAABBBBCCCCDDDDEEEEFFFF // AE_HEX_OVERFLOW
1891 Local0 = 01111222233334444555566667777 // AE_OCTAL_OVERFLOW
1892 Local0 = 11112222333344445555666677778888 // AE_DECIMAL_OVERFLOW
1894 iASL: Added a warning for the case where a ResourceTemplate is declared
1895 with no ResourceDescriptor entries (coded as "ResourceTemplate(){}"). In
1896 this case, the resulting template is created with a single END_TAG
1897 descriptor, which is essentially useless.
1899 iASL: Expanded the -vw option (ignore specific warnings/remarks) to
1900 include compilation error codes as well.
1902 ----------------------------------------
1903 28 July 2017. Summary of changes for version 20170728:
1906 1) ACPICA kernel-resident subsystem:
1908 Fixed a regression seen with small resource descriptors that could cause
1909 an inadvertent AE_AML_NO_RESOURCE_END_TAG exception.
1911 AML interpreter: Implemented a new feature that allows forward references
1912 from individual named references within package objects that are
1913 contained within blocks of "module-level code". This provides
1914 compatibility with other ACPI implementations and supports existing
1915 firmware that depends on this feature. Example:
1918 If (ABCD) /* An If() at module-level */
1920 Name (PKG1, Package()
1922 INT1 /* Forward reference to object INT1
1928 AML Interpreter: Fixed a problem with the Alias() operator where aliases
1929 to some ASL objects were not handled properly. Objects affected are:
1930 Mutex, Event, and OperationRegion.
1932 AML Debugger: Enhanced to properly handle AML Alias objects. These
1933 objects have one level of indirection which was not fully supported by
1936 Table Manager: Added support to detect and ignore duplicate SSDTs within
1937 the XSDT/RSDT. This error in the XSDT has been seen in the field.
1939 EFI and EDK2 support:
1940 Enabled /WX flag for MSVC builds
1941 Added support for AcpiOsStall, AcpiOsSleep, and AcpiOsGetTimer
1942 Added local support for 64-bit multiply and shift operations
1943 Added support to compile acpidump.efi on Windows
1944 Added OSL function stubs for interfaces not used under EFI
1946 Added additional support for the _DMA predefined name. _DMA returns a
1947 buffer containing a resource template. This change add support within the
1948 resource manager (AcpiWalkResourceBuffer) to walk and parse this list of
1949 resource descriptors. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
1952 2) iASL Compiler/Disassembler and Tools:
1954 iASL: Fixed a problem where the internal input line buffer(s) could
1955 overflow if there are very long lines in the input ASL source code file.
1956 Implemented buffer management that automatically increases the size of
1957 the buffers as necessary.
1959 iASL: Added an option (-vx) to "expect" particular remarks, warnings and
1960 errors. If the specified exception is not raised during compilation, the
1961 compiler emits an error. This is intended to support the ASL test suite,
1962 but may be useful in other contexts.
1964 iASL: Implemented a new predefined macro, __METHOD__, which returns a
1965 string containing the name of the current control method that is being
1968 iASL: Implemented debugger and table compiler support for the SDEI ACPI
1969 table (Software Delegated Exception Interface). James Morse
1970 <james.morse@arm.com>
1972 Unix/Linux makefiles: Added an option to disable compile optimizations.
1973 The disable occurs when the NOOPT flag is set to TRUE.
1974 theracermaster@gmail.com
1976 Acpidump: Added support for multiple DSDT and FACS tables. This can occur
1977 when there are different tables for 32-bit versus 64-bit.
1979 Enhanced error reporting for the ASL test suite (ASLTS) by removing
1980 unnecessary/verbose text, and emit the actual line number where an error
1981 has occurred. These changes are intended to improve the usefulness of the
1984 ----------------------------------------
1985 29 June 2017. Summary of changes for version 20170629:
1988 1) ACPICA kernel-resident subsystem:
1990 Tables: Implemented a deferred ACPI table verification. This is useful
1991 for operating systems where the tables cannot be verified in the early
1992 initialization stage due to early memory mapping limitations on some
1993 architectures. Lv Zheng.
1995 Tables: Removed the signature validation for dynamically loaded tables.
1996 Provides compatibility with other ACPI implementations. Previously, only
1997 SSDT tables were allowed, as per the ACPI specification. Now, any table
1998 signature can be used via the Load() operator. Lv Zheng.
2000 Tables: Fixed several mutex issues that could cause errors during table
2001 acquisition. Lv Zheng.
2003 Tables: Fixed a problem where an ACPI warning could be generated if a
2004 null pointer was passed to the AcpiPutTable interface. Lv Zheng.
2006 Tables: Added a mechanism to handle imbalances for the AcpiGetTable and
2007 AcpiPutTable interfaces. This applies to the "late stage" table loading
2008 when the use of AcpiPutTable is no longer required (since the system
2009 memory manager is fully running and available). Lv Zheng.
2011 Fixed/Reverted a regression during processing of resource descriptors
2012 that contain only a single EndTag. Fixes an AE_AML_NO_RESOURCE_END_TAG
2013 exception in this case.
2015 Headers: IORT/SMMU support: Updated the SMMU models for Revision C of the
2016 I/O Remapping specification. Robin Murphy <robin.murphy@arm.com>
2018 Interpreter: Fixed a possible fault if an Alias operator with an invalid
2019 or duplicate target is encountered during Alias creation in
2020 AcpiExCreateAlias. Alex James <theracermaster@gmail.com>
2022 Added an option to use designated initializers for function pointers.
2023 Kees Cook <keescook@google.com>
2026 2) iASL Compiler/Disassembler and Tools:
2028 iASL: Allow compilation of External declarations with target pathnames
2029 that refer to existing named objects within the table. Erik Schmauss.
2031 iASL: Fixed a regression when compiling FieldUnits. Fixes an error if a
2032 FieldUnit name also is declared via External in the same table. Erik
2035 iASL: Allow existing scope names within pathnames used in External
2036 statements. For example:
2037 External (ABCD.EFGH) // ABCD exists, but EFGH is truly external
2040 iASL: IORT ACPI table: Implemented changes required to decode the new
2041 Proximity Domain for the SMMUv3 IORT. Disassembler and Data Table
2042 compiler. Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
2044 Disassembler: Don't abort disassembly on errors from External()
2045 statements. Erik Schmauss.
2047 Disassembler: fixed a possible fault when one of the Create*Field
2048 operators references a Resource Template. ACPICA Bugzilla 1396.
2050 iASL: In the source code, resolved some naming inconsistences across the
2051 parsing support. Fixes confusion between "Parse Op" and "Parse Node".
2052 Adds a new file, aslparseop.c
2054 ----------------------------------------
2055 31 May 2017. Summary of changes for version 20170531:
2058 0) ACPI 6.2 support:
2060 The ACPI specification version 6.2 has been released and is available at
2061 http://uefi.org/specifications
2063 This version of ACPICA fully supports the ACPI 6.2 specification. Changes
2064 are summarized below.
2066 New ACPI tables (Table Compiler/Disassembler/Templates):
2067 HMAT (Heterogeneous Memory Attributes Table)
2068 WSMT (Windows SMM Security Mitigation Table)
2069 PPTT (Processor Properties Topology Table)
2071 New subtables for existing ACPI tables:
2072 HEST (New subtable, Arch-deferred machine check)
2073 SRAT (New subtable, Arch-specific affinity structure)
2074 PCCT (New subtables, Extended PCC subspaces (types 3 and 4))
2076 Simple updates for existing ACPI tables:
2077 BGRT (two new flag bits)
2078 HEST (New bit defined for several subtables, GHES_ASSIST)
2080 New Resource Descriptors and Resource macros (Compiler/Disassembler):
2086 New type for hardware error notification (section 18.3.2.9)
2088 New predefined names/methods (Compiler/Interpreter):
2089 _HMA (Heterogeneous Memory Attributes)
2090 _LSI (Label Storage Information)
2091 _LSR (Label Storage Read)
2092 _LSW (Label Storage Write)
2094 ASL grammar/macro changes (Compiler):
2095 For() ASL macro, implemented with the AML while operator
2096 Extensions to Concatenate operator
2097 Support for multiple definition blocks in same ASL file
2098 Clarification for Buffer operator
2099 Allow executable AML code underneath all scopes (Devices, etc.)
2100 Clarification/change for the _OSI return value
2101 ASL grammar update for reference operators
2102 Allow a zero-length string for AML filename in DefinitionBlock
2105 New device object notification value
2106 Remove a notify value (0x0C) for graceful shutdown
2107 New UUIDs for processor/cache properties and
2108 physical package property
2109 New _HID, ACPI0014 (Wireless Power Calibration Device)
2112 1) ACPICA kernel-resident subsystem:
2114 Added support to disable ACPI events on hardware-reduced platforms.
2115 Eliminates error messages of the form "Could not enable fixed event". Lv
2118 Fixed a problem using Device/Thermal objects with the ObjectType and
2119 DerefOf ASL operators. This support had not been fully/properly
2122 Fixed a problem where if a Buffer object containing a resource template
2123 was longer than the actual resource template, an error was generated --
2124 even though the AML is legal. This case has been seen in the field.
2126 Fixed a problem with the header definition of the MADT PCAT_COMPAT flag.
2127 The values for DUAL_PIC and MULTIPLE_APIC were reversed.
2129 Added header file changes for the TPM2 ACPI table. Update to new version
2130 of the TCG specification. Adds a new TPM2 subtable for ARM SMC.
2132 Exported the external interfaces AcpiAcquireMutex and AcpiReleaseMutex.
2133 These interfaces are intended to be used only in conjunction with the
2134 predefined _DLM method (Device Lock Method). "This object appears in a
2135 device scope when AML access to the device must be synchronized with the
2138 Example Code and Data Size: These are the sizes for the OS-independent
2139 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2140 debug version of the code includes the debug output trace mechanism and
2141 has a much larger code and data size.
2144 Non-Debug Version: 143.1K Code, 60.0K Data, 203.1K Total
2145 Debug Version: 204.0K Code, 84.3K Data, 288.3K Total
2147 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
2148 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
2151 2) iASL Compiler/Disassembler and Tools:
2153 iASL: Fixed a problem where an External() declaration could not refer to
2154 a Field Unit. Erik Schmauss.
2156 Disassembler: Improved support for the Switch/Case operators. This
2157 feature will disassemble AML code back to the original Switch operators
2158 when possible, instead of an If..Else sequence. David Box
2160 iASL and disassembler: Improved the handling of multiple extraneous
2161 parentheses for both ASL input and disassembled ASL output.
2163 Improved the behavior of the iASL compiler and disassembler to detect
2164 improper use of external declarations
2166 Disassembler: Now aborts immediately upon detection of an unknown AML
2167 opcode. The AML parser has no real way to recover from this, and can
2168 result in the creation of an ill-formed parse tree that causes errors
2169 later during the disassembly.
2171 All tools: Fixed a problem where the Unix application OSL did not handle
2172 control-c correctly. For example, a control-c could incorrectly wake the
2175 AcpiExec: Improved the Control-C handling and added a handler for
2176 segmentation faults (SIGSEGV). Supports both Windows and Unix-like
2179 Reduced the verbosity of the generic unix makefiles. Previously, each
2180 compilation displayed the full set of compiler options. This has been
2181 eliminated as the options are easily inspected within the makefiles. Each
2182 compilation now results in a single line of output.
2184 ----------------------------------------
2185 03 March 2017. Summary of changes for version 20170303:
2188 0) ACPICA licensing:
2190 The licensing information at the start of each source code module has
2191 been updated. In addition to the Intel license, the dual GPLv2/BSD
2192 license has been added for completeness. Now, a single version of the
2193 source code should be suitable for all ACPICA customers. This is the
2194 major change for this release since it affects all source code modules.
2197 1) ACPICA kernel-resident subsystem:
2199 Fixed two issues with the common asltypes.h header that could cause
2200 problems in some environments: (Kim Jung-uk)
2201 Removed typedef for YY_BUFFER_STATE ?
2202 Fixes an error with earlier versions of Flex.
2203 Removed use of FILE typedef (which is only defined in stdio.h)
2206 2) iASL Compiler/Disassembler and Tools:
2208 Disassembler: fixed a regression introduced in 20170224. A fix for a
2209 memory leak related to resource descriptor tags (names) could fault when
2210 the disassembler was generated with 64-bit compilers.
2212 The ASLTS test suite has been updated to implement a new testing
2213 architecture. During generation of the suite from ASL source, both the
2214 ASL and ASL+ compilers are now validated, as well as the disassembler
2215 itself (Erik Schmauss). The architecture executes as follows:
2217 For every ASL source module:
2218 Compile (legacy ASL compilation)
2219 Disassemble the resulting AML to ASL+ source code
2220 Compile the new ASL+ module
2221 Perform a binary compare on the legacy AML and the new ASL+ AML
2222 The ASLTS suite then executes normally using the AML binaries.
2224 ----------------------------------------
2225 24 February 2017. Summary of changes for version 20170224:
2228 1) ACPICA kernel-resident subsystem:
2230 Interpreter: Fixed two issues with the control method return value auto-
2231 repair feature, where an attempt to double-delete an internal object
2232 could result in an ACPICA warning (for _CID repair and others). No fault
2233 occurs, however, because the attempted deletion (actually a release to an
2234 internal cache) is detected and ignored via object poisoning.
2236 Debugger: Fixed an AML interpreter mutex issue during the single stepping
2237 of control methods. If certain debugger commands are executed during
2238 stepping, a mutex acquire/release error could occur. Lv Zheng.
2240 Fixed some issues generating ACPICA with the Intel C compiler by
2241 restoring the original behavior and compiler-specific include file in
2244 Example Code and Data Size: These are the sizes for the OS-independent
2245 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2246 debug version of the code includes the debug output trace mechanism and
2247 has a much larger code and data size.
2250 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
2251 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
2253 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
2254 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
2257 2) iASL Compiler/Disassembler and Tools:
2259 iASL/Disassembler: A preliminary version of a new ASL-to-ASL+ conversion
2260 tool has been designed, implemented, and included in this release. The
2261 key feature of this utility is that the original comments within the
2262 input ASL file are preserved during the conversion process, and included
2263 within the converted ASL+ file -- thus creating a transparent conversion
2264 of existing ASL files to ASL+ (ASL 2.0). Erik Schmauss.
2266 Usage: iasl -ca <ASL-filename> // Output is a .dsl file with
2269 iASL/Disassembler: Improved the detection and correct disassembly of
2270 Switch/Case operators. This feature detects sequences of if/elseif/else
2271 operators that originated from ASL Switch/Case/Default operators and
2272 emits the original operators. David Box.
2274 iASL: Improved the IORT ACPI table support in the following areas. Lv
2276 Clear MappingOffset if the MappingCount is zero.
2277 Fix the disassembly of the SMMU GSU interrupt offset.
2278 Update the template file for the IORT table.
2280 Disassembler: Enhanced the detection and disassembly of resource
2281 template/descriptor within a Buffer object. An EndTag descriptor is now
2282 required to have a zero second byte, since all known ASL compilers emit
2283 this. This helps eliminate incorrect decisions when a buffer is
2284 disassembled (false positives on resource templates).
2286 ----------------------------------------
2287 19 January 2017. Summary of changes for version 20170119:
2290 1) General ACPICA software:
2292 Entire source code base: Added the 2017 copyright to all source code
2293 legal/licensing module headers and utility/tool signons. This includes
2294 the standard Linux dual-license header. This affects virtually every file
2295 in the ACPICA core subsystem, iASL compiler, all ACPICA utilities, and
2296 the ACPICA test suite.
2299 2) iASL Compiler/Disassembler and Tools:
2301 iASL: Removed/fixed an inadvertent remark when a method argument
2302 containing a reference is used as a target operand within the method (and
2303 never used as a simple argument), as in the example below. Jeffrey Hugo.
2305 dsdt.asl 1507: Store(0x1, Arg0)
2306 Remark 2146 - ^ Method Argument is never used (Arg0)
2308 All tools: Removed the bit width of the compiler that generated the tool
2309 from the common signon for all user space tools. This proved to be
2310 confusing and unnecessary. This includes similar removal of HARDWARE_NAME
2311 from the generic makefiles (Thomas Petazzoni). Example below.
2314 ASL+ Optimizing Compiler version 20170119-32
2315 ASL+ Optimizing Compiler version 20170119-64
2318 ASL+ Optimizing Compiler version 20170119
2320 ----------------------------------------
2321 22 December 2016. Summary of changes for version 20161222:
2324 1) ACPICA kernel-resident subsystem:
2326 AML Debugger: Implemented a new mechanism to simplify and enhance
2327 debugger integration into all environments, including kernel debuggers
2328 and user-space utilities, as well as remote debug services. This
2329 mechanism essentially consists of new OSL interfaces to support debugger
2330 initialization/termination, as well as wait/notify interfaces to perform
2331 the debugger handshake with the host. Lv Zheng.
2334 AcpiOsInitializeDebugger (void)
2335 AcpiOsTerminateDebugger (void)
2336 AcpiOsWaitCommandReady (void)
2337 AcpiOsNotifyCommandComplete (void)
2339 New OS services layer:
2340 osgendbg.c -- Example implementation, and used for AcpiExec
2342 Update for Generic Address Space (GAS) support: Although the AccessWidth
2343 and/or BitOffset fields of the GAS are not often used, this change now
2344 fully supports these fields. This affects the internal support for FADT
2345 registers, registers in other ACPI data tables, and the AcpiRead and
2346 AcpiWrite public interfaces. Lv Zheng.
2348 Sleep support: In order to simplify integration of ACPI sleep for the
2349 various host operating systems, a new OSL interface has been introduced.
2350 AcpiOsEnterSleep allows the host to perform any required operations
2351 before the final write to the sleep control register(s) is performed by
2355 AcpiOsEnterSleep(SleepState, RegisterAValue, RegisterBValue)
2357 Called from these internal interfaces:
2361 EFI support: Added a very small EFI/ACPICA example application. Provides
2362 a simple demo for EFI integration, as well as assisting with resolution
2363 of issues related to customer ACPICA/EFI integration. Lv Zheng. See:
2365 source/tools/efihello/efihello.c
2367 Local C library: Implemented several new functions to enhance ACPICA
2368 portability, for environments where these clib functions are not
2369 available (such as EFI). Lv Zheng:
2376 Fixed a regression where occasionally a valid resource descriptor was
2377 incorrectly detected as invalid at runtime, and a
2378 AE_AML_NO_RESOURCE_END_TAG was returned.
2380 Fixed a problem with the recently implemented support that enables
2381 control method invocations as Target operands to many ASL operators.
2382 Warnings of this form: "Needed type [Reference], found [Processor]" were
2383 seen at runtime for some method invocations.
2385 Example Code and Data Size: These are the sizes for the OS-independent
2386 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2387 debug version of the code includes the debug output trace mechanism and
2388 has a much larger code and data size.
2391 Non-Debug Version: 141.5K Code, 58.5K Data, 200.0K Total
2392 Debug Version: 201.7K Code, 82.7K Data, 284.4K Total
2394 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
2395 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
2398 2) iASL Compiler/Disassembler and Tools:
2400 Disassembler: Enhanced output by adding the capability to detect and
2401 disassemble ASL Switch/Case statements back to the original ASL source
2402 code instead of if/else blocks. David Box.
2404 AcpiHelp: Split a large file into separate files based upon
2405 functionality/purpose. New files are:
2409 ----------------------------------------
2410 17 November 2016. Summary of changes for version 20161117:
2413 1) ACPICA kernel-resident subsystem:
2415 Table Manager: Fixed a regression introduced in 20160729, "FADT support
2416 cleanup". This was an attempt to remove all references in the source to
2417 the FADT version 2, which never was a legal version number. It was
2418 skipped because it was an early version of 64-bit support that was
2419 eventually abandoned for the current 64-bit support.
2421 Interpreter: Fixed a problem where runtime implicit conversion was
2422 incorrectly disabled for the ASL operators below. This brings the
2423 behavior into compliance with the ACPI specification:
2431 Table Manager: Added a new public interface, AcpiPutTable, used to
2432 release and free an ACPI table returned by AcpiGetTable and related
2433 interfaces. Lv Zheng.
2435 Example Code and Data Size: These are the sizes for the OS-independent
2436 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2437 debug version of the code includes the debug output trace mechanism and
2438 has a much larger code and data size.
2441 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
2442 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
2444 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
2445 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
2448 2) iASL Compiler/Disassembler and Tools:
2450 Disassembler: Fixed a regression for disassembly of Resource Template.
2451 Detection of templates in the AML stream missed some types of templates.
2453 iASL: Fixed a problem where an Access Size error was returned for the PCC
2454 address space when the AccessSize of the GAS register is greater than a
2457 iASL: Implemented several grammar changes for the operators below. These
2458 changes are slated for the next version of the ACPI specification:
2459 RefOf - Disallow method invocation as an operand
2460 CondRefOf - Disallow method invocation as an operand
2461 DerefOf - Disallow operands that use the result from operators
2463 do not return a reference (Changed TermArg to
2466 iASL: Control method invocations are now allowed for Target operands, as
2467 per the ACPI specification. Removed error for using a control method
2468 invocation as a Target operand.
2470 Disassembler: Improved detection of Resource Templates, Unicode, and
2471 Strings within Buffer objects. These subtypes do not contain a specific
2472 opcode to indicate the originating ASL code, and they must be detected by
2473 other means within the disassembler.
2475 iASL: Implemented an optimization improvement for 32-bit ACPI tables
2476 (DSDT/SSDT). For the 32-bit case only, compute the optimum integer opcode
2477 only after 64-bit to 32-bit truncation. A truncation warning message is
2478 still emitted, however.
2480 AcpiXtract: Implemented handling for both types of line terminators (LF
2481 or CR/LF) so that it can accept AcpiDump output files from any system.
2484 AcpiBin: Added two new options for comparing AML files:
2485 -a: compare and display ALL mismatches
2486 -o: start compare at this offset into the second file
2488 ----------------------------------------
2489 30 September 2016. Summary of changes for version 20160930:
2492 1) ACPICA kernel-resident subsystem:
2494 Fixed a regression in the internal AcpiTbFindTable function where a non
2495 AE_OK exception could inadvertently be returned even if the function did
2496 not fail. This problem affects the following operators:
2500 Fixed a regression in the LoadTable operator where a load to any
2501 namespace location other than the root no longer worked properly.
2503 Increased the maximum loop count value that will result in the
2504 AE_AML_INFINITE_LOOP exception. This is a mechanism that is intended to
2505 prevent infinite loops within the AML interpreter and thus the host OS
2506 kernel. The value is increased from 0xFFFF to 0xFFFFF loops (65,535 to
2509 Moved the AcpiGbl_MaxLoopIterations configuration variable to the public
2510 acpixf.h file. This allows hosts to easily configure the maximum loop
2513 Removed an illegal character in the strtoul64.c file. This character
2514 caused errors with some C compilers.
2516 Example Code and Data Size: These are the sizes for the OS-independent
2517 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2518 debug version of the code includes the debug output trace mechanism and
2519 has a much larger code and data size.
2522 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
2523 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
2525 Non-Debug Version: 140.0K Code, 58.1K Data, 198.1K Total
2526 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
2529 2) iASL Compiler/Disassembler and Tools:
2531 Disassembler: Fixed a problem with the conversion of Else{If{ blocks into
2532 the simpler ASL ElseIf keyword. During the conversion, a trailing If
2533 block could be lost and missing from the disassembled output.
2535 iASL: Fixed a missing parser rule for the ObjectType operator. For ASL+,
2536 the missing rule caused a parse error when using the Index operator as an
2537 operand to ObjectType. This construct now compiles properly. Example:
2538 ObjectType(PKG1[4]).
2540 iASL: Correctly handle unresolved symbols in the hardware map file (-lm
2541 option). Previously, unresolved symbols could cause a protection fault.
2542 Such symbols are now marked as unresolved in the map file.
2544 iASL: Implemented support to allow control method invocations as an
2545 operand to the ASL DeRefOf operator. Example:
2546 DeRefOf(MTH1(Local0))
2548 Disassembler: Improved support for the ToPLD ASL macro. Detection of a
2549 possible _PLD buffer now includes examination of both the normal buffer
2550 length (16 or 20) as well as the surrounding AML package length.
2552 Disassembler: Fixed a problem with the decoding of complex expressions
2553 within the Divide operator for ASL+. For the case where both the quotient
2554 and remainder targets are specified, the entire statement cannot be
2555 disassembled. Previously, the output incorrectly contained a mix of ASL-
2556 and ASL+ operators. This mixed statement causes a syntax error when
2558 Divide (Add (INT1, 6), 128, RSLT, QUOT) // was incorrectly
2560 Divide (INT1 + 6, 128, RSLT, QUOT)
2562 iASL/Tools: Added support to process AML and non-AML ACPI tables
2563 consistently. For the disassembler and AcpiExec, allow all types of ACPI
2564 tables (AML and data tables). For the iASL -e option, allow only AML
2567 ----------------------------------------
2568 31 August 2016. Summary of changes for version 20160831:
2571 1) ACPICA kernel-resident subsystem:
2573 Improve support for the so-called "module-level code", which is defined
2574 to be math, logical and control AML opcodes that appear outside of any
2575 control method. This change improves the support by adding more opcodes
2576 that can be executed in the manner. Some other issues have been solved,
2577 and the ASL grammar changes to support such code under all scope
2578 operators (Device, etc.) are complete. Lv Zheng.
2580 UEFI support: these OSL functions have been implemented. This is an
2581 additional step toward supporting the AcpiExec utility natively (with
2582 full hardware access) under UEFI. Marcelo Ferreira.
2583 AcpiOsReadPciConfiguration
2584 AcpiOsWritePciConfiguration
2586 Fixed a possible mutex error during control method auto-serialization. Lv
2589 Updated support for the Generic Address Structure by fully implementing
2590 all GAS fields when a 32-bit address is expanded to a 64-bit GAS. Lv
2593 Updated the return value for the internal _OSI method. Instead of
2594 0xFFFFFFFF, the "Ones" value is now returned, which is 0xFFFFFFFFFFFFFFFF
2595 for 64-bit ACPI tables. This fixes an incompatibility with other ACPI
2596 implementations, and will be reflected and clarified in the next version
2597 of the ACPI specification.
2599 Implemented two new table events that can be passed to an ACPICA table
2600 handler. These events are used to indicate a table installation or
2601 uninstallation. These events are used in addition to existed table load
2602 and unload events. Lv Zheng.
2604 Implemented a cleanup for all internal string-to-integer conversions.
2605 Consolidate multiple versions of this functionality and limit possible
2606 bases to either 10 or 16 to simplify the code. Adds a new file,
2609 Cleanup the inclusion order of the various compiler-specific headers.
2610 This simplifies build configuration management. The compiler-specific
2611 headers are now split out from the host-specific headers. Lv Zheng.
2613 Example Code and Data Size: These are the sizes for the OS-independent
2614 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2615 debug version of the code includes the debug output trace mechanism and
2616 has a much larger code and data size.
2619 Non-Debug Version: 140.1K Code, 58.1K Data, 198.1K Total
2620 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
2623 2) iASL Compiler/Disassembler and Tools:
2625 iASL/AcpiExec: Added a command line option to display the build date/time
2626 of the tool (-vd). This can be useful to verify that the correct version
2627 of the tools are being used.
2629 AML Debugger: Implemented a new subcommand ("execute predef") to execute
2630 all predefined control methods and names within the current namespace.
2631 This can be useful for debugging problems with ACPI tables and the ACPI
2634 ----------------------------------------
2635 29 July 2016. Summary of changes for version 20160729:
2638 1) ACPICA kernel-resident subsystem:
2640 Implemented basic UEFI support for the various ACPICA tools. This
2642 1) An OSL to implement the various AcpiOs* interfaces on UEFI.
2643 2) Support to obtain the ACPI tables on UEFI.
2644 3) Local implementation of required C library functions not available on
2646 4) A front-end (main) function for the tools for UEFI-related
2649 The initial deployment of this support is the AcpiDump utility executing
2650 as an UEFI application via EDK2 (EDKII, "UEFI Firmware Development Kit").
2651 Current environments supported are Linux/Unix. MSVC generation is not
2652 supported at this time. See the generate/efi/README file for build
2653 instructions. Lv Zheng.
2655 Future plans include porting the AcpiExec utility to execute natively on
2656 the platform with I/O and memory access. This will allow viewing/dump of
2657 the platform namespace and native execution of ACPI control methods that
2658 access the actual hardware. To fully implement this support, the OSL
2659 functions below must be implemented with UEFI interfaces. Any community
2660 help in the implementation of these functions would be appreciated:
2665 AcpiOsReadPciConfiguration
2666 AcpiOsWritePciConfiguration
2668 Restructured and standardized the C library configuration for ACPICA,
2669 resulting in the various configuration options below. This includes a
2670 global restructuring of the compiler-dependent and platform-dependent
2671 include files. These changes may affect the existing platform-dependent
2672 configuration files on some hosts. Lv Zheng.
2674 The current C library configuration options appear below. For any issues,
2675 it may be helpful to examine the existing compiler-dependent and
2676 platform-dependent files as examples. Lv Zheng.
2679 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
2681 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
2682 2) Unix/Windows/BSD applications:
2683 ACPI_USE_STANDARD_HEADERS=y in order to use system-provided C
2685 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
2686 3) UEFI applications:
2687 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
2689 ACPI_USE_SYSTEM_CLIBRARY=n in order to use ACPICA mini C library.
2690 4) UEFI applications (EDK2/StdLib):
2691 ACPI_USE_STANDARD_HEADERS=y in order to use EDK2 StdLib C library.
2692 ACPI_USE_SYSTEM_CLIBRARY=y in order to use EDK2 StdLib C library.
2695 AML interpreter: "module-level code" support. Allows for execution of so-
2696 called "executable" AML code (math/logical operations, etc.) outside of
2697 control methods not just at the module level (top level) but also within
2698 any scope declared outside of a control method - Scope{}, Device{},
2699 Processor{}, PowerResource{}, and ThermalZone{}. Lv Zheng.
2701 Simplified the configuration of the "maximum AML loops" global option by
2702 adding a global public variable, "AcpiGbl_MaxLoopIterations" which can be
2703 modified at runtime.
2706 Example Code and Data Size: These are the sizes for the OS-independent
2707 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2708 debug version of the code includes the debug output trace mechanism and
2709 has a much larger code and data size.
2712 Non-Debug Version: 139.1K Code, 22.9K Data, 162.0K Total
2713 Debug Version: 199.0K Code, 81.8K Data, 280.8K Total
2716 2) iASL Compiler/Disassembler and Tools:
2718 iASL: Add full support for the RASF ACPI table (RAS Features Table).
2719 Includes disassembler, data table compiler, and header support.
2721 iASL Expand "module-level code" support. Allows for
2722 compilation/disassembly of so-called "executable" AML code (math/logical
2723 operations, etc.) outside of control methods not just at the module level
2724 (top level) but also within any scope declared outside of a control
2725 method - Scope{}, Device{}, Processor{}, PowerResource{}, and
2728 AcpiDump: Added support for dumping all SSDTs on newer versions of
2729 Windows. These tables are now easily available -- SSDTs are not available
2730 through the registry on older versions.
2732 ----------------------------------------
2733 27 May 2016. Summary of changes for version 20160527:
2736 1) ACPICA kernel-resident subsystem:
2738 Temporarily reverted the new arbitrary bit length/alignment support in
2739 AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been
2740 a number of regressions with the new code that need to be fully resolved
2741 and tested before this support can be finally integrated into ACPICA.
2742 Apologies for any inconveniences these issues may have caused.
2744 The ACPI message macros are not configurable (ACPI_MSG_ERROR,
2745 ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR,
2746 and ACPI_MSG_BIOS_WARNING). Lv Zheng.
2748 Fixed a couple of GCC warnings associated with the use of the -Wcast-qual
2749 option. Adds a new return macro, return_STR. Junk-uk Kim.
2751 Example Code and Data Size: These are the sizes for the OS-independent
2752 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2753 debug version of the code includes the debug output trace mechanism and
2754 has a much larger code and data size.
2757 Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
2758 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
2760 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
2761 Debug Version: 200.9K Code, 82.2K Data, 283.1K Total
2763 ----------------------------------------
2764 22 April 2016. Summary of changes for version 20160422:
2766 1) ACPICA kernel-resident subsystem:
2768 Fixed a regression in the GAS (generic address structure) arbitrary bit
2769 support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior
2770 and incorrect return values. Lv Zheng. ACPICA BZ 1270.
2772 ACPI 6.0: Added support for new/renamed resource macros. One new argument
2773 was added to each of these macros, and the original name has been
2774 deprecated. The AML disassembler will always disassemble to the new
2775 names. Support for the new macros was added to iASL, disassembler,
2776 resource manager, and the acpihelp utility. ACPICA BZ 1274.
2778 I2cSerialBus -> I2cSerialBusV2
2779 SpiSerialBus -> SpiSerialBusV2
2780 UartSerialBus -> UartSerialBusV2
2782 ACPI 6.0: Added support for a new integer field that was appended to the
2783 package object returned by the _BIX method. This adds iASL compile-time
2784 and AML runtime error checking. ACPICA BZ 1273.
2786 ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm
2787 Subspace Type2" (Headers, Disassembler, and data table compiler).
2789 Example Code and Data Size: These are the sizes for the OS-independent
2790 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2791 debug version of the code includes the debug output trace mechanism and
2792 has a much larger code and data size.
2795 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
2796 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
2798 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
2799 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
2802 2) iASL Compiler/Disassembler and Tools:
2804 iASL: Implemented an ASL grammar extension to allow/enable executable
2805 "module-level code" to be created and executed under the various
2806 operators that create new scopes. This type of AML code is already
2807 supported in all known AML interpreters, and the grammar change will
2808 appear in the next version of the ACPI specification. Simplifies the
2809 conditional runtime creation of named objects under these object types:
2817 iASL: Implemented a new ASL extension, a "For" loop macro to add greater
2818 ease-of-use to the ASL language. The syntax is similar to the
2819 corresponding C operator, and is implemented with the existing AML While
2820 opcode -- thus requiring no changes to existing AML interpreters.
2822 For (Initialize, Predicate, Update) {TermList}
2827 Initializer // Nothing | TermArg => ComputationalData
2828 Predicate // Nothing | TermArg => ComputationalData
2829 Update // Nothing | TermArg => ComputationalData
2833 iASL: The _HID/_ADR detection and validation has been enhanced to search
2834 under conditionals in order to allow these objects to be conditionally
2837 iASL: Fixed several issues with the constant folding feature. The
2838 improvement allows better detection and resolution of statements that can
2839 be folded at compile time. ACPICA BZ 1266.
2841 iASL/Disassembler: Fixed a couple issues with the Else{If{}...}
2842 conversion to the ASL ElseIf operator where incorrect ASL code could be
2845 iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where
2846 sometimes an extra (and extraneous) set of parentheses were emitted for
2847 some combinations of operators. Although this did not cause any problems
2848 with recompilation of the disassembled code, it made the code more
2849 difficult to read. David Box. ACPICA BZ 1231.
2851 iASL: Changed to ignore the unreferenced detection for predefined names
2852 of resource descriptor elements, when the resource descriptor is
2853 created/defined within a control method.
2855 iASL: Disassembler: Fix a possible fault with externally declared Buffer
2858 ----------------------------------------
2859 18 March 2016. Summary of changes for version 20160318:
2861 1) ACPICA kernel-resident subsystem:
2863 Added support for arbitrary bit lengths and bit offsets for registers
2864 defined by the Generic Address Structure. Previously, only aligned bit
2865 lengths of 8/16/32/64 were supported. This was sufficient for many years,
2866 but recently some machines have been seen that require arbitrary bit-
2867 level support. ACPICA BZ 1240. Lv Zheng.
2869 Fixed an issue where the \_SB._INI method sometimes must be evaluated
2870 before any _REG methods are evaluated. Lv Zheng.
2872 Implemented several changes related to ACPI table support
2873 (Headers/Disassembler/TableCompiler):
2874 NFIT: For ACPI 6.1, updated to add some additional new fields and
2876 FADT: Updated a warning message and set compliance to ACPI 6.1 (Version
2878 DMAR: Added new constants per the 10/2014 DMAR spec.
2879 IORT: Added new subtable per the 10/2015 IORT spec.
2880 HEST: For ACPI 6.1, added new constants and new subtable.
2881 DBG2: Added new constants per the 12/2015 DBG2 spec.
2882 FPDT: Fixed several incorrect fields, add the FPDT boot record structure.
2884 ERST/EINJ: Updated disassembler with new "Execute Timings" actions.
2886 Updated header support for the DMAR table to match the current version of
2889 Added extensions to the ASL Concatenate operator to allow any ACPI object
2890 to be passed as an operand. Any object other than Integer/String/Buffer
2891 simply returns a string containing the object type. This extends the
2892 usefulness of the Printf macros. Previously, Concatenate would abort the
2893 control method if a non-data object was encountered.
2895 ACPICA source code: Deployed the C "const" keyword across the source code
2896 where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).
2898 Example Code and Data Size: These are the sizes for the OS-independent
2899 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2900 debug version of the code includes the debug output trace mechanism and
2901 has a much larger code and data size.
2904 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
2905 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
2907 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
2908 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
2911 2) iASL Compiler/Disassembler and Tools:
2913 iASL/Disassembler: Improved the heuristic used to determine the number of
2914 arguments for an externally defined control method (a method in another
2915 table). Although this is an improvement, there is no deterministic way to
2916 "guess" the number of method arguments. Only the ACPI 6.0 External opcode
2917 will completely solve this problem as it is deployed (automatically) in
2920 iASL/Disassembler: Fixed an ordering issue for emitted External() ASL
2921 statements that could cause errors when the disassembled file is
2922 compiled. ACPICA BZ 1243. David Box.
2924 iASL: Fixed a regression caused by the merger of the two versions of the
2925 local strtoul64. Because of a dependency on a global variable, strtoul64
2926 could return an error for integers greater than a 32-bit value. ACPICA BZ
2929 iASL: Fixed a regression where a fault could occur for an ASL Return
2930 statement if it invokes a control method that is not resolved. ACPICA BZ
2933 AcpiXtract: Improved input file validation: detection of binary files and
2934 non-acpidump text files.
2936 ----------------------------------------
2937 12 February 2016. Summary of changes for version 20160212:
2939 1) ACPICA kernel-resident subsystem:
2941 Implemented full support for the ACPI 6.1 specification (released in
2942 January). This version of the specification is available at:
2943 http://www.uefi.org/specifications
2945 Only a relatively small number of changes were required in ACPICA to
2946 support ACPI 6.1, in these areas:
2947 - New predefined names
2949 - A new subtable for HEST
2950 - A few other header changes for new values
2952 Ensure \_SB_._INI is executed before any _REG methods are executed. There
2953 appears to be existing BIOS code that relies on this behavior. Lv Zheng.
2955 Reverted a change made in version 20151218 which enabled method
2956 invocations to be targets of various ASL operators (SuperName and Target
2957 grammar elements). While the new behavior is supported by the ACPI
2958 specification, other AML interpreters do not support this behavior and
2959 never will. The ACPI specification will be updated for ACPI 6.2 to remove
2960 this support. Therefore, the change was reverted to the original ACPICA
2963 ACPICA now supports the GCC 6 compiler.
2965 Current Release: (Note: build changes increased sizes)
2966 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
2967 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
2969 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
2970 Debug Version: 200.4K Code, 81.9K Data, 282.3K Total
2973 2) iASL Compiler/Disassembler and Tools:
2975 Completed full support for the ACPI 6.0 External() AML opcode. The
2976 compiler emits an external AML opcode for each ASL External statement.
2977 This opcode is used by the disassembler to assist with the disassembly of
2978 external control methods by specifying the required number of arguments
2979 for the method. AML interpreters do not use this opcode. To ensure that
2980 interpreters do not even see the opcode, a block of one or more external
2981 opcodes is surrounded by an "If(0)" construct. As this feature becomes
2982 commonly deployed in BIOS code, the ability of disassemblers to correctly
2983 disassemble AML code will be greatly improved. David Box.
2985 iASL: Implemented support for an optional cross-reference output file.
2986 The -lx option will create a the cross-reference file with the suffix
2987 "xrf". Three different types of cross-reference are created in this file:
2988 - List of object references made from within each control method
2989 - Invocation (caller) list for each user-defined control method
2990 - List of references to each non-method object in the namespace
2992 iASL: Method invocations as ASL Target operands are now disallowed and
2993 flagged as errors in preparation for ACPI 6.2 (see the description of the
2996 ----------------------------------------
2997 8 January 2016. Summary of changes for version 20160108:
2999 1) ACPICA kernel-resident subsystem:
3001 Updated all ACPICA copyrights and signons to 2016: Added the 2016
3002 copyright to all source code module headers and utility/tool signons.
3003 This includes the standard Linux dual-license header. This affects
3004 virtually every file in the ACPICA core subsystem, iASL compiler, all
3005 ACPICA utilities, and the ACPICA test suite.
3007 Fixed a regression introduced in version 20151218 concerning the
3008 execution of so-called module-level ASL/AML code. Namespace objects
3009 created under a module-level If() construct were not properly/fully
3010 entered into the namespace and could cause an interpreter fault when
3013 Example Code and Data Size: These are the sizes for the OS-independent
3014 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3015 debug version of the code includes the debug output trace mechanism and
3016 has a much larger code and data size.
3019 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
3020 Debug Version: 200.4K Code, 81.9K Data, 282.4K Total
3022 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
3023 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
3026 2) iASL Compiler/Disassembler and Tools:
3028 Fixed a problem with the compilation of the GpioIo and GpioInt resource
3029 descriptors. The _PIN field name was incorrectly defined to be an array
3030 of 32-bit values, but the _PIN values are in fact 16 bits each. This
3031 would cause incorrect bit width warnings when using Word (16-bit) fields
3032 to access the descriptors.
3035 ----------------------------------------
3036 18 December 2015. Summary of changes for version 20151218:
3038 1) ACPICA kernel-resident subsystem:
3040 Implemented per-AML-table execution of "module-level code" as individual
3041 ACPI tables are loaded into the namespace during ACPICA initialization.
3042 In other words, any module-level code within an AML table is executed
3043 immediately after the table is loaded, instead of batched and executed
3044 after all of the tables have been loaded. This provides compatibility
3045 with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng,
3048 To fully support the feature above, the default operation region handlers
3049 for the SystemMemory, SystemIO, and PCI_Config address spaces are now
3050 installed before any ACPI tables are loaded. This enables module-level
3051 code to access these address spaces during the table load and module-
3052 level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David
3055 Implemented several changes to the internal _REG support in conjunction
3056 with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples
3057 utilities for the changes above. Although these tools were changed, host
3058 operating systems that simply use the default handlers for SystemMemory,
3059 SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.
3061 For example, in the code below, DEV1 is conditionally added to the
3062 namespace by the DSDT via module-level code that accesses an operation
3063 region. The SSDT references DEV1 via the Scope operator. DEV1 must be
3064 created immediately after the DSDT is loaded in order for the SSDT to
3065 successfully reference DEV1. Previously, this code would cause an
3066 AE_NOT_EXIST exception during the load of the SSDT. Now, this code is
3067 fully supported by ACPICA.
3069 DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
3071 OperationRegion (OPR1, SystemMemory, 0x400, 32)
3072 Field (OPR1, AnyAcc, NoLock, Preserve)
3083 DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
3085 External (\DEV1, DeviceObj)
3091 Fixed an AML interpreter problem where control method invocations were
3092 not handled correctly when the invocation was itself a SuperName argument
3093 to another ASL operator. In these cases, the method was not invoked.
3094 ACPICA BZ 1002. Affects the following ASL operators that have a SuperName
3099 Decrement, Increment
3102 Signal, Release, Reset
3105 Implemented automatic String-to-ObjectReference conversion support for
3106 packages returned by predefined names (such as _DEP). A common BIOS error
3107 is to add double quotes around an ObjectReference namepath, which turns
3108 the reference into an unexpected string object. This support detects the
3109 problem and corrects it before the package is returned to the caller that
3110 invoked the method. Lv Zheng.
3112 Implemented extensions to the Concatenate operator. Concatenate now
3113 accepts any type of object, it is not restricted to simply
3114 Integer/String/Buffer. For objects other than these 3 basic data types,
3115 the argument is treated as a string containing the name of the object
3116 type. This expands the utility of Concatenate and the Printf/Fprintf
3117 macros. ACPICA BZ 1222.
3119 Cleaned up the output of the ASL Debug object. The timer() value is now
3120 optional and no longer emitted by default. Also, the basic data types of
3121 Integer/String/Buffer are simply emitted as their values, without a data
3122 type string -- since the data type is obvious from the output. ACPICA BZ
3125 Example Code and Data Size: These are the sizes for the OS-independent
3126 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3127 debug version of the code includes the debug output trace mechanism and
3128 has a much larger code and data size.
3131 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
3132 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
3134 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
3135 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
3138 2) iASL Compiler/Disassembler and Tools:
3140 iASL: Fixed some issues with the ASL Include() operator. This operator
3141 was incorrectly defined in the iASL parser rules, causing a new scope to
3142 be opened for the code within the include file. This could lead to
3143 several issues, including allowing ASL code that is technically illegal
3144 and not supported by AML interpreters. Note, this does not affect the
3145 related #include preprocessor operator. ACPICA BZ 1212.
3147 iASL/Disassembler: Implemented support for the ASL ElseIf operator. This
3148 operator is essentially an ASL macro since there is no AML opcode
3149 associated with it. The code emitted by the iASL compiler for ElseIf is
3150 an Else opcode followed immediately by an If opcode. The disassembler
3151 will now emit an ElseIf if it finds an Else immediately followed by an
3152 If. This simplifies the decoded ASL, especially for deeply nested
3153 If..Else and large Switch constructs. Thus, the disassembled code more
3154 closely follows the original source ASL. ACPICA BZ 1211. Example:
3166 ElseIf (Arg0 == 0x02)
3171 AcpiExec: Added support for the new module level code behavior and the
3172 early region installation. This required a small change to the
3173 initialization, since AcpiExec must install its own operation region
3176 AcpiExec: Added support to make the debug object timer optional. Default
3177 is timer disabled. This cleans up the debug object output -- the timer
3178 data is rarely used.
3180 AcpiExec: Multiple ACPI tables are now loaded in the order that they
3181 appear on the command line. This can be important when there are
3182 interdependencies/references between the tables.
3184 iASL/Templates. Add support to generate template files with multiple
3185 SSDTs within a single output file. Also added ommand line support to
3186 specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ
3190 ----------------------------------------
3191 24 November 2015. Summary of changes for version 20151124:
3193 1) ACPICA kernel-resident subsystem:
3195 Fixed a possible regression for a previous update to FADT handling. The
3196 FADT no longer has a fixed table ID, causing some issues with code that
3197 was hardwired to a specific ID. Lv Zheng.
3199 Fixed a problem where the method auto-serialization could interfere with
3200 the current SyncLevel. This change makes the auto-serialization support
3201 transparent to the SyncLevel support and management.
3203 Removed support for the _SUB predefined name in AcpiGetObjectInfo. This
3204 interface is intended for early access to the namespace during the
3205 initial namespace device discovery walk. The _SUB method has been seen to
3206 access operation regions in some cases, causing errors because the
3207 operation regions are not fully initialized.
3209 AML Debugger: Fixed some issues with the terminate/quit/exit commands
3210 that can cause faults. Lv Zheng.
3212 AML Debugger: Add thread ID support so that single-step mode only applies
3213 to the AML Debugger thread. This prevents runtime errors within some
3216 Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx
3217 methods that are invoked by this interface are optional, removed warnings
3218 emitted for the case where one or more of these methods do not exist.
3219 ACPICA BZ 1208, original change by Prarit Bhargava.
3221 Made a major pass through the entire ACPICA source code base to
3222 standardize formatting that has diverged a bit over time. There are no
3223 functional changes, but this will of course cause quite a few code
3224 differences from the previous ACPICA release.
3226 Example Code and Data Size: These are the sizes for the OS-independent
3227 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3228 debug version of the code includes the debug output trace mechanism and
3229 has a much larger code and data size.
3232 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
3233 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
3235 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
3236 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
3239 2) iASL Compiler/Disassembler and Tools:
3241 iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple
3242 definition blocks within a single ASL file and the resulting AML file.
3243 Support for this type of file was also added to the various tools that
3244 use binary AML files: acpiexec, acpixtract, and the AML disassembler. The
3245 example code below shows two definition blocks within the same file:
3247 DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template",
3251 DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
3255 iASL: Enhanced typechecking for the Name() operator. All expressions for
3256 the value of the named object must be reduced/folded to a single constant
3257 at compile time, as per the ACPI specification (the AML definition of
3260 iASL: Fixed some code indentation issues for the -ic and -ia options (C
3261 and assembly headers). Now all emitted code correctly begins in column 1.
3263 iASL: Added an error message for an attempt to open a Scope() on an
3264 object defined in an SSDT. The DSDT is always loaded into the namespace
3265 first, so any attempt to open a Scope on an SSDT object will fail at
3269 ----------------------------------------
3270 30 September 2015. Summary of changes for version 20150930:
3272 1) ACPICA kernel-resident subsystem:
3274 Debugger: Implemented several changes and bug fixes to assist support for
3275 the in-kernel version of the AML debugger. Lv Zheng.
3276 - Fix the "predefined" command for in-kernel debugger.
3277 - Do not enter debug command loop for the help and version commands.
3278 - Disallow "execute" command during execution/single-step of a method.
3280 Interpreter: Updated runtime typechecking for all operators that have
3281 target operands. The operand is resolved and validated that it is legal.
3282 For example, the target cannot be a non-data object such as a Device,
3283 Mutex, ThermalZone, etc., as per the ACPI specification.
3285 Debugger: Fixed the double-mutex user I/O handshake to work when local
3286 deadlock detection is enabled.
3288 Debugger: limited display of method locals and arguments (LocalX and
3289 ArgX) to only those that have actually been initialized. This prevents
3290 lines of extraneous output.
3292 Updated the definition of the NFIT table to correct the bit polarity of
3293 one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED
3295 Example Code and Data Size: These are the sizes for the OS-independent
3296 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3297 debug version of the code includes the debug output trace mechanism and
3298 has a much larger code and data size.
3301 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
3302 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
3304 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
3305 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
3308 2) iASL Compiler/Disassembler and Tools:
3310 iASL: Improved the compile-time typechecking for operands of many of the
3313 -- Added an option to disable compiler operand/operator typechecking (-
3316 -- For the following operators, the TermArg operands are now validated
3317 when possible to be Integer data objects: BankField, OperationRegion,
3318 DataTableRegion, Buffer, and Package.
3320 -- Store (Source, Target): Both the source and target operands are
3321 resolved and checked that the operands are both legal. For example,
3322 neither operand can be a non-data object such as a Device, Mutex,
3323 ThermalZone, etc. Note, as per the ACPI specification, the CopyObject
3324 operator can be used to store an object to any type of target object.
3326 -- Store (Source, Target): If the source is a Package object, the target
3327 must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target
3328 is a Package, the source must also be a Package.
3330 -- Store (Source, Target): A warning is issued if the source and target
3331 resolve to the identical named object.
3333 -- Store (Source, <method invocation>): An error is generated for the
3334 target method invocation, as this construct is not supported by the AML
3337 -- For all ASL math and logic operators, the target operand must be a
3338 data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This
3339 includes the function return value also.
3341 -- External declarations are also included in the typechecking where
3342 possible. External objects defined using the UnknownObj keyword cannot be
3343 typechecked, however.
3345 iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index
3347 - Legacy code: Index(PKG1, 3)
3348 - New ASL+ code: PKG1[3]
3349 This completes the ACPI 6.0 ASL+ support as it was the only operator not
3352 iASL: Fixed the file suffix for the preprocessor output file (.i). Two
3353 spaces were inadvertently appended to the filename, causing file access
3354 and deletion problems on some systems.
3356 ASL Test Suite (ASLTS): Updated the master makefile to generate all
3357 possible compiler output files when building the test suite -- thus
3358 exercising these features of the compiler. These files are automatically
3359 deleted when the test suite exits.
3362 ----------------------------------------
3363 18 August 2015. Summary of changes for version 20150818:
3365 1) ACPICA kernel-resident subsystem:
3367 Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv
3368 Zheng. ACPICA BZ 1186.
3370 Completed development to ensure that the ACPICA Disassembler and Debugger
3371 are fully standalone components of ACPICA. Removed cross-component
3372 dependences. Lv Zheng.
3374 The max-number-of-AML-loops is now runtime configurable (previously was
3375 compile-time only). This is essentially a loop timeout to force-abort
3376 infinite AML loops. ACPCIA BZ 1192.
3378 Debugger: Cleanup output to dump ACPI names and namepaths without any
3379 trailing underscores. Lv Zheng. ACPICA BZ 1135.
3381 Removed unnecessary conditional compilations across the Debugger and
3382 Disassembler components where entire modules could be left uncompiled.
3384 The aapits test is deprecated and has been removed from the ACPICA git
3385 tree. The test has never been completed and has not been maintained, thus
3386 becoming rather useless. ACPICA BZ 1015, 794.
3388 A batch of small changes to close bugzilla and other reports:
3389 - Remove duplicate code for _PLD processing. ACPICA BZ 1176.
3390 - Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
3391 - iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
3392 - ACPI table support: general cleanup and simplification. Lv Zheng, Bob
3394 - ACPI table support: fix for a buffer read overrun in AcpiTbFindTable.
3396 - Enhance parameter validation for DataTableRegion and LoadTable ASL/AML
3398 - Debugger: Split debugger initialization/termination interfaces. Lv
3400 - AcpiExec: Emit OemTableId for SSDTs during the load phase for table
3402 - AcpiExec: Add debug message during _REG method phase during table
3404 - AcpiNames: Fix a regression where some output was missing and no longer
3406 - Debugger: General cleanup and simplification. Lv Zheng.
3407 - Disassembler: Cleanup use of several global option variables. Lv Zheng.
3409 Example Code and Data Size: These are the sizes for the OS-independent
3410 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3411 debug version of the code includes the debug output trace mechanism and
3412 has a much larger code and data size.
3415 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
3416 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
3418 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
3419 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
3422 2) iASL Compiler/Disassembler and Tools:
3424 AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT
3425 were not handled properly and caused load errors. Now, properly invoke
3426 and use the ACPICA auto-reallocate mechanism for ACPI table data
3427 structures. ACPICA BZ 1188
3429 AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA
3432 AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For
3433 AcpiExec, this means that no control methods (like _REG/_INI/_STA) are
3434 executed during initialization. ACPICA BZ 1187, 1189.
3436 iASL/Disassembler: Implemented a prototype "listing" mode that emits AML
3437 that corresponds to each disassembled ASL statement, to simplify
3438 debugging. ACPICA BZ 1191.
3440 Debugger: Add option to the "objects" command to display a summary of the
3441 current namespace objects (Object type and count). This is displayed if
3442 the command is entered with no arguments.
3444 AcpiNames: Add -x option to specify debug level, similar to AcpiExec.
3447 ----------------------------------------
3448 17 July 2015. Summary of changes for version 20150717:
3450 1) ACPICA kernel-resident subsystem:
3452 Improved the partitioning between the Debugger and Disassembler
3453 components. This allows the Debugger to be used standalone within kernel
3454 code without the Disassembler (which is used for single stepping also).
3455 This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.
3457 Debugger: Implemented a new command to trace the execution of control
3458 methods (Trace). This is especially useful for the in-kernel version of
3459 the debugger when file I/O may not be available for method trace output.
3460 See the ACPICA reference for more information. Lv Zheng.
3462 Moved all C library prototypes (used for the local versions of these
3463 functions when requested) to a new header, acclib.h
3464 Cleaned up the use of non-ANSI C library functions. These functions are
3465 implemented locally in ACPICA. Moved all such functions to a common
3466 source file, utnonansi.c
3468 Debugger: Fixed a problem with the "!!" command (get last command
3469 executed) where the debugger could enter an infinite loop and eventually
3472 Removed the use of local macros that were used for some of the standard C
3473 library functions to automatically cast input parameters. This mostly
3474 affected the is* functions where the input parameter is defined to be an
3475 int. This required a few modifications to the main ACPICA source code to
3476 provide casting for these functions and eliminate possible compiler
3477 warnings for these parameters.
3479 Across the source code, added additional status/error checking to resolve
3480 issues discovered by static source code analysis tools such as Coverity.
3482 Example Code and Data Size: These are the sizes for the OS-independent
3483 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3484 debug version of the code includes the debug output trace mechanism and
3485 has a much larger code and data size.
3488 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
3489 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
3491 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
3492 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
3495 2) iASL Compiler/Disassembler and Tools:
3497 iASL: Fixed a regression where the device map file feature no longer
3498 worked properly when used in conjunction with the disassembler. It only
3499 worked properly with the compiler itself.
3501 iASL: Implemented a new warning for method LocalX variables that are set
3502 but never used (similar to a C compiler such as gcc). This also applies
3503 to ArgX variables that are not defined by the parent method, and are
3504 instead (legally) used as local variables.
3506 iASL/Preprocessor: Finished the pass-through of line numbers from the
3507 preprocessor to the compiler. This ensures that compiler errors/warnings
3508 have the correct original line numbers and filenames, regardless of any
3511 iASL/Preprocessor: Fixed a couple of issues with comment handling and the
3512 pass-through of comments to the preprocessor output file (which becomes
3513 the compiler input file). Also fixed a problem with // comments that
3514 appear after a math expression.
3516 iASL: Added support for the TCPA server table to the table compiler and
3517 template generator. (The client table was already previously supported)
3519 iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to
3520 identify the iASL compiler.
3522 Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined
3523 multiple times. The new names are ACPI_SIGN_NEGATIVE and
3526 AcpiHelp: Update to expand help messages for the iASL preprocessor
3530 ----------------------------------------
3531 19 June 2015. Summary of changes for version 20150619:
3533 Two regressions in version 20150616 have been addressed:
3535 Fixes some problems/issues with the C library macro removal (ACPI_STRLEN,
3536 etc.) This update changes ACPICA to only use the standard headers for
3537 functions, or the prototypes for the local versions of the C library
3538 functions. Across the source code, this required some additional casts
3539 for some Clib invocations for portability. Moved all local prototypes to
3540 a new file, acclib.h
3542 Fixes several problems with recent changes to the handling of the FACS
3543 table that could cause some systems not to boot.
3546 ----------------------------------------
3547 16 June 2015. Summary of changes for version 20150616:
3550 1) ACPICA kernel-resident subsystem:
3552 Across the entire ACPICA source code base, the various macros for the C
3553 library functions (such as ACPI_STRLEN, etc.) have been removed and
3554 replaced by the standard C library names (strlen, etc.) The original
3555 purpose for these macros is no longer applicable. This simplification
3556 reduces the number of macros used in the ACPICA source code
3557 significantly, improving readability and maintainability.
3559 Implemented support for a new ACPI table, the OSDT. This table, the
3560 "override" SDT, can be loaded directly by the host OS at boot time. It
3561 enables the replacement of existing namespace objects that were installed
3562 via the DSDT and/or SSDTs. The primary purpose for this is to replace
3563 buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated
3564 for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob
3567 Added support for systems with (improperly) two FACS tables -- a "32-bit"
3568 table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit
3569 X field). This change will support both automatically. There continues to
3570 be systems found with this issue. This support requires a change to the
3571 AcpiSetFirmwareWakingVector interface. Also, a public global variable has
3572 been added to allow the host to select which FACS is desired
3573 (AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more
3576 Added a new feature to allow for systems that do not contain an FACS.
3577 Although this is already supported on hardware-reduced platforms, the
3578 feature has been extended for all platforms. The reasoning is that we do
3579 not want to abort the entire ACPICA initialization just because the
3580 system is seriously buggy and has no FACS.
3582 Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were
3583 not correctly transcribed from the ACPI specification in ACPICA version
3586 Implemented support for the _CLS object in the AcpiGetObjectInfo external
3589 Updated the definitions of the TCPA and TPM2 ACPI tables to the more
3590 recent TCG ACPI Specification, December 14, 2014. Table disassembler and
3591 compiler also updated. Note: The TCPA "server" table is not supported by
3592 the disassembler/table-compiler at this time.
3594 ACPI 6.0: Added definitions for the new GIC version field in the MADT.
3596 Example Code and Data Size: These are the sizes for the OS-independent
3597 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3598 debug version of the code includes the debug output trace mechanism and
3599 has a much larger code and data size.
3602 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
3603 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
3605 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
3606 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
3609 2) iASL Compiler/Disassembler and Tools:
3611 Disassembler: Fixed a problem with the new symbolic operator disassembler
3612 where incorrect ASL code could be emitted in some cases for the "non-
3613 commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and
3614 ShiftRight. The actual problem cases seem to be rather unusual in common
3615 ASL code, however. David Box.
3617 Modified the linux version of acpidump to obtain ACPI tables from not
3618 just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv
3621 iASL: Fixed a problem where the user preprocessor output file (.i)
3622 contained extra data that was not expected. The compiler was using this
3623 file as a temporary file and passed through #line directives in order to
3624 keep compiler error messages in sync with the input file and line number
3625 across multiple include files. The (.i) is no longer a temporary file as
3626 the compiler uses a new, different file for the original purpose.
3628 iASL: Fixed a problem where comments within the original ASL source code
3629 file were not passed through to the preprocessor output file, nor any
3632 iASL: Fixed some issues for the handling of the "#include" preprocessor
3633 directive and the similar (but not the same) "Include" ASL operator.
3635 iASL: Add support for the new OSDT in both the disassembler and compiler.
3637 iASL: Fixed a problem with the constant folding support where a Buffer
3638 object could be incorrectly generated (incorrectly formed) during a
3639 conversion to a Store() operator.
3641 AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new
3642 description text for the _REV predefined name. _REV now permanently
3643 returns 2, as per the ACPI 6.0 specification.
3645 Debugger: Enhanced the output of the Debug ASL object for references
3646 produced by the Index operator. For Buffers and strings, only output the
3647 actual byte pointed to by the index. For packages, only print the single
3648 package element decoded by the index. Previously, the entire
3649 buffer/string/package was emitted.
3651 iASL/Table-compiler: Fixed a regression where the "generic" data types
3652 were no longer recognized, causing errors.
3655 ----------------------------------------
3656 15 May 2015. Summary of changes for version 20150515:
3658 This release implements most of ACPI 6.0 as described below.
3660 1) ACPICA kernel-resident subsystem:
3662 Implemented runtime argument checking and return value checking for all
3663 new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI,
3664 _MTL, _PRR, _RDI, _RST, _TFP, _TSN.
3666 Example Code and Data Size: These are the sizes for the OS-independent
3667 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3668 debug version of the code includes the debug output trace mechanism and
3669 has a much larger code and data size.
3672 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
3673 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
3675 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
3676 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
3679 2) iASL Compiler/Disassembler and Tools:
3681 iASL compiler: Added compile-time support for all new ACPI 6.0 predefined
3682 names (argument count validation and return value typechecking.)
3684 iASL disassembler and table compiler: implemented support for all new
3685 ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV.
3687 iASL disassembler and table compiler: Added ACPI 6.0 changes to existing
3690 iASL preprocessor: Added a new directive to enable inclusion of binary
3691 blobs into ASL code. The new directive is #includebuffer. It takes a
3692 binary file as input and emits a named ascii buffer object into the ASL
3695 AcpiHelp: Added support for all new ACPI 6.0 predefined names.
3697 AcpiHelp: Added a new option, -d, to display all iASL preprocessor
3700 AcpiHelp: Added a new option, -t, to display all known/supported ACPI
3704 ----------------------------------------
3705 10 April 2015. Summary of changes for version 20150410:
3707 Reverted a change introduced in version 20150408 that caused
3708 a regression in the disassembler where incorrect operator
3709 symbols could be emitted.
3712 ----------------------------------------
3713 08 April 2015. Summary of changes for version 20150408:
3716 1) ACPICA kernel-resident subsystem:
3718 Permanently set the return value for the _REV predefined name. It now
3719 returns 2 (was 5). This matches other ACPI implementations. _REV will be
3720 deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2
3721 for ACPI 2.0 and later. It should never be used to differentiate or
3722 identify operating systems.
3724 Added the "Windows 2015" string to the _OSI support. ACPICA will now
3725 return TRUE to a query with this string.
3727 Fixed several issues with the local version of the printf function.
3729 Added the C99 compiler option (-std=c99) to the Unix makefiles.
3732 Non-Debug Version: 99.9K Code, 27.4K Data, 127.3K Total
3733 Debug Version: 195.2K Code, 80.7K Data, 275.9K Total
3735 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
3736 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
3739 2) iASL Compiler/Disassembler and Tools:
3741 iASL: Implemented an enhancement to the constant folding feature to
3742 transform the parse tree to a simple Store operation whenever possible:
3743 Add (2, 3, X) ==> is converted to: Store (5, X)
3744 X = 2 + 3 ==> is converted to: Store (5, X)
3746 Updated support for the SLIC table (Software Licensing Description Table)
3747 in both the Data Table compiler and the disassembler. The SLIC table
3748 support now conforms to "Microsoft Software Licensing Tables (SLIC and
3749 MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data
3750 following the ACPI header is now defined to be "Proprietary Data", and as
3751 such, can only be entered or displayed as a hex data block.
3753 Implemented full support for the MSDM table as described in the document
3754 above. Note: The format of MSDM is similar to SLIC. Any MSDM data
3755 following the ACPI header is defined to be "Proprietary Data", and can
3756 only be entered or displayed as a hex data block.
3758 Implemented the -Pn option for the iASL Table Compiler (was only
3759 implemented for the ASL compiler). This option disables the iASL
3762 Disassembler: For disassembly of Data Tables, added a comment field
3763 around the Ascii equivalent data that is emitted as part of the "Raw
3764 Table Data" block. This prevents the iASL Preprocessor from possible
3765 confusion if/when the table is compiled.
3767 Disassembler: Added an option (-df) to force the disassembler to assume
3768 that the table being disassembled contains valid AML. This feature is
3769 useful for disassembling AML files that contain ACPI signatures other
3770 than DSDT or SSDT (such as OEMx or other signatures).
3772 Changes for the EFI version of the tools:
3773 1) Fixed a build error/issue
3774 2) Fixed a cast warning
3776 iASL: Fixed a path issue with the __FILE__ operator by making the
3777 directory prefix optional within the internal SplitInputFilename
3780 Debugger: Removed some unused global variables.
3782 Tests: Updated the makefile for proper generation of the AAPITS suite.
3785 ----------------------------------------
3786 04 February 2015. Summary of changes for version 20150204:
3788 ACPICA kernel-resident subsystem:
3790 Updated all ACPICA copyrights and signons to 2014. Added the 2014
3791 copyright to all module headers and signons, including the standard Linux
3792 header. This affects virtually every file in the ACPICA core subsystem,
3793 iASL compiler, all ACPICA utilities, and the test suites.
3795 Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
3796 A raw gpe handling mechanism was created to allow better handling of GPE
3797 storms that aren't easily managed by the normal handler. The raw handler
3798 allows disabling/renabling of the GPE so that interrupt storms can be
3799 avoided in cases where events cannot be timely serviced. In this
3800 scenario, handlers should use the AcpiSetGpe() API to disable/enable the
3801 GPE. This API will leave the reference counts undisturbed, thereby
3802 preventing unintentional clearing of the GPE when the intent in only to
3803 temporarily disable it. Raw handlers allow enabling and disabling of a
3804 GPE by removing GPE register locking. As such, raw handlers much provide
3805 their own locks while using GPE API's to protect access to GPE data
3809 Events: Always modify GPE registers under the GPE lock.
3810 Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
3811 values. Reported as bug by joe.liu@apple.com.
3813 Unix makefiles: Separate option to disable optimizations and
3814 _FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the
3815 NOOPT disable option and creates a separate flag (NOFORTIFY) for this
3816 purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined
3817 errors when building ACPICA. This allows disabling the option without
3818 also having to disable optimazations.
3822 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
3823 Debug Version: 199.2K Code, 82.4K Data, 281.6K Total
3826 --------------------------------------
3827 07 November 2014. Summary of changes for version 20141107:
3829 This release is available at https://acpica.org/downloads
3831 This release introduces and implements language extensions to ASL that
3832 provide support for symbolic ("C-style") operators and expressions. These
3833 language extensions are known collectively as ASL+.
3836 1) iASL Compiler/Disassembler and Tools:
3838 Disassembler: Fixed a problem with disassembly of the UartSerialBus
3839 macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E.
3842 Disassembler: Fixed the Unicode macro support to add escape sequences.
3843 All non-printable ASCII values are emitted as escape sequences, as well
3844 as the standard escapes for quote and backslash. Ensures that the
3845 disassembled macro can be correctly recompiled.
3847 iASL: Added Printf/Fprintf macros for formatted output. These macros are
3848 translated to existing AML Concatenate and Store operations. Printf
3849 writes to the ASL Debug object. Fprintf allows the specification of an
3850 ASL name as the target. Only a single format specifier is required, %o,
3851 since the AML interpreter dynamically converts objects to the required
3854 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
3855 (Concatenate (Concatenate (Concatenate ("", Arg0),
3856 ": Unexpected value for "), Arg1), ", "), Arg2),
3857 " at line "), Arg3), Debug)
3859 (new) Printf ("%o: Unexpected value for %o, %o at line %o",
3860 Arg0, Arg1, Arg2, Arg3)
3862 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
3863 ("", Arg1), ": "), Arg0), " Successful"), STR1)
3865 (new) Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)
3867 iASL: Added debug options (-bp, -bt) to dynamically prune levels of the
3868 ASL parse tree before the AML code is generated. This allows blocks of
3869 ASL code to be removed in order to help locate and identify problem
3870 devices and/or code. David E. Box.
3872 AcpiExec: Added support (-fi) for an optional namespace object
3873 initialization file. This file specifies initial values for namespace
3874 objects as necessary for debugging and testing different ASL code paths
3875 that may be taken as a result of BIOS options.
3878 2) Overview of symbolic operator support for ASL (ASL+)
3879 -------------------------------------------------------
3881 As an extension to the ASL language, iASL implements support for symbolic
3882 (C-style) operators for math and logical expressions. This can greatly
3883 simplify ASL code as well as improve both readability and
3884 maintainability. These language extensions can exist concurrently with
3885 all legacy ASL code and expressions.
3887 The symbolic extensions are 100% compatible with existing AML
3888 interpreters, since no new AML opcodes are created. To implement the
3889 extensions, the iASL compiler transforms the symbolic expressions into
3890 the legacy ASL/AML equivalents at compile time.
3892 Full symbolic expressions are supported, along with the standard C
3893 precedence and associativity rules.
3895 Full disassembler support for the symbolic expressions is provided, and
3896 creates an automatic migration path for existing ASL code to ASL+ code
3897 via the disassembly process. By default, the disassembler now emits ASL+
3898 code with symbolic expressions. An option (-dl) is provided to force the
3899 disassembler to emit legacy ASL code if desired.
3901 Below is the complete list of the currently supported symbolic operators
3902 with examples. See the iASL User Guide for additional information.
3905 ASL+ Syntax Legacy ASL Equivalent
3906 ----------- ---------------------
3910 Z = X + Y Add (X, Y, Z)
3911 Z = X - Y Subtract (X, Y, Z)
3912 Z = X * Y Multiply (X, Y, Z)
3913 Z = X / Y Divide (X, Y, , Z)
3914 Z = X % Y Mod (X, Y, Z)
3915 Z = X << Y ShiftLeft (X, Y, Z)
3916 Z = X >> Y ShiftRight (X, Y, Z)
3917 Z = X & Y And (X, Y, Z)
3918 Z = X | Y Or (X, Y, Z)
3919 Z = X ^ Y Xor (X, Y, Z)
3924 // Logical operators
3926 (X == Y) LEqual (X, Y)
3927 (X != Y) LNotEqual (X, Y)
3928 (X < Y) LLess (X, Y)
3929 (X > Y) LGreater (X, Y)
3930 (X <= Y) LLessEqual (X, Y)
3931 (X >= Y) LGreaterEqual (X, Y)
3932 (X && Y) LAnd (X, Y)
3936 // Assignment and compound assignment operations
3939 X += Y Add (X, Y, X)
3940 X -= Y Subtract (X, Y, X)
3941 X *= Y Multiply (X, Y, X)
3942 X /= Y Divide (X, Y, , X)
3943 X %= Y Mod (X, Y, X)
3944 X <<= Y ShiftLeft (X, Y, X)
3945 X >>= Y ShiftRight (X, Y, X)
3946 X &= Y And (X, Y, X)
3948 X ^= Y Xor (X, Y, X)
3955 If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
3956 And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530,
3958 0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
3960 And (MEMB, 0xFFFFFFF0, SRMB)
3961 Store (MEMB, Local2)
3962 Store (PDBM, Local1)
3963 And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
3965 Or (PDBM, 0x02, PDBM)
3969 If (((R510 & 0x03FB) == 0x02E0) ||
3970 ((R520 & 0x03FB) == 0x02E0) ||
3971 ((R530 & 0x03FB) == 0x02E0) ||
3972 ((R540 & 0x03FB) == 0x02E0))
3974 SRMB = (MEMB & 0xFFFFFFF0)
3977 PDBM &= 0xFFFFFFFFFFFFFFF9
3983 Store (0x1234, Local1)
3984 Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
3985 Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
3986 Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
3987 Store (Index (PKG1, 0x03), Local6)
3988 Store (Add (Local3, Local2), Debug)
3989 Add (Local1, 0x0F, Local2)
3990 Add (Local1, Multiply (Local2, Local3), Local2)
3991 Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)
3995 Local3 = (((Local1 + TEST) + 0x20) * Local2)
3996 Local3 = (Local2 * ((Local1 + TEST) + 0x20))
3997 Local3 = (Local1 + (TEST + (0x20 * Local2)))
3998 Local6 = Index (PKG1, 0x03)
3999 Debug = (Local3 + Local2)
4000 Local2 = (Local1 + 0x0F)
4001 Local2 = (Local1 + (Local2 * Local3))
4002 Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))
4005 ----------------------------------------
4006 26 September 2014. Summary of changes for version 20140926:
4008 1) ACPICA kernel-resident subsystem:
4010 Updated the GPIO operation region handler interface (GeneralPurposeIo).
4011 In order to support GPIO Connection objects with multiple pins, along
4012 with the related Field objects, the following changes to the interface
4013 have been made: The Address is now defined to be the offset in bits of
4014 the field unit from the previous invocation of a Connection. It can be
4015 viewed as a "Pin Number Index" into the connection resource descriptor.
4016 The BitWidth is the exact bit width of the field. It is usually one bit,
4017 but not always. See the ACPICA reference guide (section 8.8.6.2.1) for
4018 additional information and examples.
4020 GPE support: During ACPICA/GPE initialization, ensure that all GPEs with
4021 corresponding _Lxx/_Exx methods are disabled (they may have been enabled
4022 by the firmware), so that they cannot fire until they are enabled via
4023 AcpiUpdateAllGpes. Rafael J. Wysocki.
4025 Added a new return flag for the Event/GPE status interfaces --
4026 AcpiGetEventStatus and AcpiGetGpeStatus. The new
4027 ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or
4028 GPE currently has a handler associated with it, and can thus actually
4029 affect the system. Lv Zheng.
4031 Example Code and Data Size: These are the sizes for the OS-independent
4032 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4033 debug version of the code includes the debug output trace mechanism and
4034 has a much larger code and data size.
4037 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
4038 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
4040 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
4041 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
4043 2) iASL Compiler/Disassembler and Tools:
4045 iASL: Fixed a memory allocation/free regression introduced in 20140828
4046 that could cause the compiler to crash. This was introduced inadvertently
4047 during the effort to eliminate compiler memory leaks. ACPICA BZ 1111,
4050 iASL: Removed two error messages that have been found to create false
4051 positives, until they can be fixed and fully validated (ACPICA BZ 1112):
4052 1) Illegal forward reference within a method
4053 2) Illegal reference across two methods
4055 iASL: Implemented a new option (-lm) to create a hardware mapping file
4056 that summarizes all GPIO, I2C, SPI, and UART connections. This option
4057 works for both the compiler and disassembler. See the iASL compiler user
4058 guide for additional information and examples (section 6.4.6).
4060 AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to
4061 version 2. This corrects the AE_BAD_HEADER exception seen on systems with
4062 a version 1 RSDP. Lv Zheng ACPICA BZ 1097.
4064 AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode
4065 unless STDIN is actually a terminal. Assists with batch-mode processing.
4068 Disassembler/AcpiHelp: Added another large group of recognized _HID
4072 ----------------------------------------
4073 28 August 2014. Summary of changes for version 20140828:
4075 1) ACPICA kernel-resident subsystem:
4077 Fixed a problem related to the internal use of the Timer() operator where
4078 a 64-bit divide could cause an attempted link to a double-precision math
4079 library. This divide is not actually necessary, so the code was
4080 restructured to eliminate it. Lv Zheng.
4082 ACPI 5.1: Added support for the runtime validation of the _DSD package
4083 (similar to the iASL support).
4085 ACPI 5.1/Headers: Added support for the GICC affinity subtable to the
4086 SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.
4088 Example Code and Data Size: These are the sizes for the OS-independent
4089 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4090 debug version of the code includes the debug output trace mechanism and
4091 has a much larger code and data size.
4094 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
4095 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
4097 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total1
4098 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
4100 2) iASL Compiler/Disassembler and Tools:
4102 AcpiExec: Fixed a problem on unix systems where the original terminal
4103 state was not always properly restored upon exit. Seen when using the -v
4104 option. ACPICA BZ 1104.
4106 iASL: Fixed a problem with the validation of the ranges/length within the
4107 Memory24 resource descriptor. There was a boundary condition when the
4108 range was equal to the (length -1) caused by the fact that these values
4109 are defined in 256-byte blocks, not bytes. ACPICA BZ 1098
4111 Disassembler: Fixed a problem with the GpioInt descriptor interrupt
4113 flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword
4115 now supported properly.
4117 ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported
4118 in the disassembler, data table compiler, and table template generator.
4120 iASL: Added a requirement for Device() objects that one of either a _HID
4121 or _ADR must exist within the scope of a Device, as per the ACPI
4122 specification. Remove a similar requirement that was incorrectly in place
4123 for the _DSD object.
4125 iASL: Added error detection for illegal named references within control
4126 methods that would cause runtime failures. Now trapped as errors are: 1)
4127 References to objects within a non-parent control method. 2) Forward
4128 references (within a method) -- for control methods, AML interpreters use
4129 a one-pass parse of control methods. ACPICA BZ 1008.
4131 iASL: Added error checking for dependencies related to the _PSx power
4132 methods. ACPICA BZ 1029.
4133 1) For _PS0, one of these must exist within the same scope: _PS1, _PS2,
4135 2) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same
4138 iASL and table compiler: Cleanup miscellaneous memory leaks by fully
4139 deploying the existing object and string caches and adding new caches for
4142 iASL: Split the huge parser source file into multiple subfiles to improve
4143 manageability. Generation now requires the M4 macro preprocessor, which
4144 is part of the Bison distribution on both unix and windows platforms.
4146 AcpiSrc: Fixed and removed all extraneous warnings generated during
4147 entire ACPICA source code scan and/or conversion.
4150 ----------------------------------------
4152 24 July 2014. Summary of changes for version 20140724:
4154 The ACPI 5.1 specification has been released and is available at:
4155 http://uefi.org/specs/access
4158 0) ACPI 5.1 support in ACPICA:
4160 ACPI 5.1 is fully supported in ACPICA as of this release.
4162 New predefined names. Support includes iASL and runtime ACPICA
4164 _CCA (Cache Coherency Attribute).
4165 _DSD (Device-Specific Data). David Box.
4167 Modifications to existing ACPI tables. Support includes headers, iASL
4168 Data Table compiler, disassembler, and the template generator.
4169 FADT - New fields and flags. Graeme Gregory.
4170 GTDT - One new subtable and new fields. Tomasz Nowicki.
4171 MADT - Two new subtables. Tomasz Nowicki.
4172 PCCT - One new subtable.
4175 New notification type for System Resource Affinity change events.
4178 1) ACPICA kernel-resident subsystem:
4180 Fixed a regression introduced in 20140627 where a fault can happen during
4181 the deletion of Alias AML namespace objects. The problem affected both
4182 the core ACPICA and the ACPICA tools including iASL and AcpiExec.
4184 Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a
4185 simple mechanism to enable wake GPEs that have no associated handler or
4186 control method. Rafael Wysocki.
4188 Updated the AcpiEnableGpe interface to disallow the enable if there is no
4189 handler or control method associated with the particular GPE. This will
4190 help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
4192 Updated GPE handling and dispatch by disabling the GPE before clearing
4193 the status bit for edge-triggered GPEs. Lv Zheng.
4195 Added Timer() support to the AML Debug object. The current timer value is
4196 now displayed with each invocation of (Store to) the debug object to
4197 enable simple generation of execution times for AML code (method
4198 execution for example.) ACPICA BZ 1093.
4200 Example Code and Data Size: These are the sizes for the OS-independent
4201 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4202 debug version of the code includes the debug output trace mechanism and
4203 has a much larger code and data size.
4206 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total
4207 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
4209 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
4210 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
4213 2) iASL Compiler/Disassembler and Tools:
4215 Fixed an issue with the recently added local printf implementation,
4216 concerning width/precision specifiers that could cause incorrect output.
4217 Lv Zheng. ACPICA BZ 1094.
4219 Disassembler: Added support to detect buffers that contain UUIDs and
4220 disassemble them to an invocation of the ToUUID operator. Also emit
4221 commented descriptions of known ACPI-related UUIDs.
4223 AcpiHelp: Added support to display known ACPI-related UUIDs. New option,
4224 -u. Adds three new files.
4226 iASL: Update table compiler and disassembler for DMAR table changes that
4227 were introduced in September 2013. With assistance by David Woodhouse.
4229 ----------------------------------------
4230 27 June 2014. Summary of changes for version 20140627:
4232 1) ACPICA kernel-resident subsystem:
4234 Formatted Output: Implemented local versions of standard formatted output
4235 utilities such as printf, etc. Over time, it has been discovered that
4236 there are in fact many portability issues with printf, and the addition
4237 of this feature will fix/prevent these issues once and for all. Some
4238 known issues are summarized below:
4240 1) Output of 64-bit values is not portable. For example, UINT64 is %ull
4241 for the Linux kernel and is %uI64 for some MSVC versions.
4242 2) Invoking printf consistently in a manner that is portable across both
4243 32-bit and 64-bit platforms is difficult at best in many situations.
4244 3) The output format for pointers varies from system to system (leading
4245 zeros especially), and leads to inconsistent output from ACPICA across
4247 4) Certain platform-specific printf formats may conflict with ACPICA use.
4248 5) If there is no local C library available, ACPICA now has local support
4251 -- To address these printf issues in a complete manner, ACPICA now
4252 directly implements a small subset of printf format specifiers, only
4253 those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
4255 Implemented support for ACPICA generation within the EFI environment.
4256 Initially, the AcpiDump utility is supported in the UEFI shell
4257 environment. Lv Zheng.
4259 Added a new external interface, AcpiLogError, to improve ACPICA
4260 portability. This allows the host to redirect error messages from the
4261 ACPICA utilities. Lv Zheng.
4263 Added and deployed new OSL file I/O interfaces to improve ACPICA
4271 There are C library implementations of these functions in the new file
4272 service_layers/oslibcfs.c -- however, the functions can be implemented by
4273 the local host in any way necessary. Lv Zheng.
4275 Implemented a mechanism to disable/enable ACPI table checksum validation
4276 at runtime. This can be useful when loading tables very early during OS
4277 initialization when it may not be possible to map the entire table in
4278 order to compute the checksum. Lv Zheng.
4280 Fixed a buffer allocation issue for the Generic Serial Bus support.
4281 Originally, a fixed buffer length was used. This change allows for
4282 variable-length buffers based upon the protocol indicated by the field
4283 access attributes. Reported by Lan Tianyu. Lv Zheng.
4285 Fixed a problem where an object detached from a namespace node was not
4286 properly terminated/cleared and could cause a circular list problem if
4287 reattached. ACPICA BZ 1063. David Box.
4289 Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
4291 Fixed a possible memory leak in an error return path within the function
4292 AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
4294 Example Code and Data Size: These are the sizes for the OS-independent
4295 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4296 debug version of the code includes the debug output trace mechanism and
4297 has a much larger code and data size.
4300 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
4301 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
4303 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
4304 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
4307 2) iASL Compiler/Disassembler and Tools:
4309 Disassembler: Add dump of ASCII equivalent text within a comment at the
4310 end of each line of the output for the Buffer() ASL operator.
4312 AcpiDump: Miscellaneous changes:
4313 Fixed repetitive table dump in -n mode.
4314 For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
4315 the ACPI 2.0 GUID fails.
4317 iASL: Fixed a problem where the compiler could fault if incorrectly given
4318 an acpidump output file as input. ACPICA BZ 1088. David Box.
4320 AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
4321 they are invoked without any arguments.
4323 Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
4324 1086. Colin Ian King.
4326 Disassembler: Cleaned up a block of code that extracts a parent Op
4327 object. Added a comment that explains that the parent is guaranteed to be
4328 valid in this case. ACPICA BZ 1069.
4331 ----------------------------------------
4332 24 April 2014. Summary of changes for version 20140424:
4334 1) ACPICA kernel-resident subsystem:
4336 Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
4337 Some of these tables are known to contain a trailing NULL entry. Lv
4340 Removed an extraneous error message for the case where there are a large
4341 number of system GPEs (> 124). This was the "32-bit FADT register is too
4342 long to convert to GAS struct" message, which is irrelevant for GPEs
4343 since the GPEx_BLK_LEN fields of the FADT are always used instead of the
4344 (limited capacity) GAS bit length. Also, several changes to ensure proper
4345 support for GPE numbers > 255, where some "GPE number" fields were 8-bits
4348 Implemented and deployed additional configuration support for the public
4349 ACPICA external interfaces. Entire classes of interfaces can now be
4350 easily modified or configured out, replaced by stubbed inline functions
4351 by default. Lv Zheng.
4353 Moved all public ACPICA runtime configuration globals to the public
4354 ACPICA external interface file for convenience. Also, removed some
4355 obsolete/unused globals. See the file acpixf.h. Lv Zheng.
4357 Documentation: Added a new section to the ACPICA reference describing the
4358 maximum number of GPEs that can be supported by the FADT-defined GPEs in
4359 block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
4362 Example Code and Data Size: These are the sizes for the OS-independent
4363 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4364 debug version of the code includes the debug output trace mechanism and
4365 has a much larger code and data size.
4368 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
4369 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
4371 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
4372 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
4375 2) iASL Compiler/Disassembler and Tools:
4377 iASL and disassembler: Add full support for the LPIT table (Low Power
4378 Idle Table). Includes support in the disassembler, data table compiler,
4379 and template generator.
4382 1) Add option to force the use of the RSDT (over the XSDT).
4383 2) Improve validation of the RSDP signature (use 8 chars instead of 4).
4385 iASL: Add check for predefined packages that are too large. For
4386 predefined names that contain subpackages, check if each subpackage is
4387 too large. (Check for too small already exists.)
4389 Debugger: Updated the GPE command (which simulates a GPE by executing the
4390 GPE code paths in ACPICA). The GPE device is now optional, and defaults
4391 to the GPE 0/1 FADT-defined blocks.
4393 Unix application OSL: Update line-editing support. Add additional error
4394 checking and take care not to reset terminal attributes on exit if they
4395 were never set. This should help guarantee that the terminal is always
4396 left in the previous state on program exit.
4399 ----------------------------------------
4400 25 March 2014. Summary of changes for version 20140325:
4402 1) ACPICA kernel-resident subsystem:
4404 Updated the auto-serialize feature for control methods. This feature
4405 automatically serializes all methods that create named objects in order
4406 to prevent runtime errors. The update adds support to ignore the
4407 currently executing AML SyncLevel when invoking such a method, in order
4408 to prevent disruption of any existing SyncLevel priorities that may exist
4409 in the AML code. Although the use of SyncLevels is relatively rare, this
4410 change fixes a regression where an AE_AML_MUTEX_ORDER exception can
4411 appear on some machines starting with the 20140214 release.
4413 Added a new external interface to allow the host to install ACPI tables
4414 very early, before the namespace is even created. AcpiInstallTable gives
4415 the host additional flexibility for ACPI table management. Tables can be
4416 installed directly by the host as if they had originally appeared in the
4417 XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
4418 (anything except the DSDT and FACS). Adds a new file, tbdata.c, along
4419 with additional internal restructuring and cleanup. See the ACPICA
4420 Reference for interface details. Lv Zheng.
4422 Added validation of the checksum for all incoming dynamically loaded
4423 tables (via external interfaces or via AML Load/LoadTable operators). Lv
4426 Updated the use of the AcpiOsWaitEventsComplete interface during Notify
4427 and GPE handler removal. Restructured calls to eliminate possible race
4428 conditions. Lv Zheng.
4430 Added a warning for the use/execution of the ASL/AML Unload (table)
4431 operator. This will help detect and identify machines that use this
4432 operator if and when it is ever used. This operator has never been seen
4433 in the field and the usage model and possible side-effects of the drastic
4434 runtime action of a full table removal are unknown.
4436 Reverted the use of #pragma push/pop which was introduced in the 20140214
4437 release. It appears that push and pop are not implemented by enough
4438 compilers to make the use of this feature feasible for ACPICA at this
4439 time. However, these operators may be deployed in a future ACPICA
4442 Added the missing EXPORT_SYMBOL macros for the install and remove SCI
4445 Source code generation:
4446 1) Disabled the use of the "strchr" macro for the gcc-specific
4447 generation. For some versions of gcc, this macro can periodically expose
4448 a compiler bug which in turn causes compile-time error(s).
4449 2) Added support for PPC64 compilation. Colin Ian King.
4451 Example Code and Data Size: These are the sizes for the OS-independent
4452 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4453 debug version of the code includes the debug output trace mechanism and
4454 has a much larger code and data size.
4457 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
4458 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
4460 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
4461 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
4464 2) iASL Compiler/Disassembler and Tools:
4466 Disassembler: Added several new features to improve the readability of
4467 the resulting ASL code. Extra information is emitted within comment
4468 fields in the ASL code:
4469 1) Known _HID/_CID values are decoded to descriptive text.
4470 2) Standard values for the Notify() operator are decoded to descriptive
4472 3) Target operands are expanded to full pathnames (in a comment) when
4475 Disassembler: Miscellaneous updates for extern() handling:
4476 1) Abort compiler if file specified by -fe option does not exist.
4477 2) Silence unnecessary warnings about argument count mismatches.
4478 3) Update warning messages concerning unresolved method externals.
4479 4) Emit "UnknownObj" keyword for externals whose type cannot be
4483 1) Added the -a option to display both the ASL syntax and the AML
4484 encoding for an input ASL operator. This effectively displays all known
4485 information about an ASL operator with one AcpiHelp invocation.
4486 2) Added substring match support (similar to a wildcard) for the -i
4487 (_HID/PNP IDs) option.
4489 iASL/Disassembler: Since this tool does not yet support execution on big-
4490 endian machines, added detection of endianness and an error message if
4491 execution is attempted on big-endian. Support for big-endian within iASL
4492 is a feature that is on the ACPICA to-be-done list.
4495 1) Remove option to extract binary files from an acpidump; this function
4496 is made obsolete by the AcpiXtract utility.
4497 2) General cleanup of open files and allocated buffers.
4500 ----------------------------------------
4501 14 February 2014. Summary of changes for version 20140214:
4503 1) ACPICA kernel-resident subsystem:
4505 Implemented a new mechanism to proactively prevent problems with ill-
4506 behaved reentrant control methods that create named ACPI objects. This
4507 behavior is illegal as per the ACPI specification, but is nonetheless
4508 frequently seen in the field. Previously, this could lead to an
4509 AE_ALREADY_EXISTS exception if the method was actually entered by more
4510 than one thread. This new mechanism detects such methods at table load
4511 time and marks them "serialized" to prevent reentrancy. A new global
4512 option, AcpiGbl_AutoSerializeMethods, has been added to disable this
4513 feature if desired. This mechanism and global option obsoletes and
4514 supersedes the previous AcpiGbl_SerializeAllMethods option.
4516 Added the "Windows 2013" string to the _OSI support. ACPICA will now
4517 respond TRUE to _OSI queries with this string. It is the stated policy of
4518 ACPICA to add new strings to the _OSI support as soon as possible after
4519 they are defined. See the full ACPICA _OSI policy which has been added to
4520 the utilities/utosi.c file.
4522 Hardened/updated the _PRT return value auto-repair code:
4523 1) Do not abort the repair on a single subpackage failure, continue to
4524 check all subpackages.
4525 2) Add check for the minimum subpackage length (4).
4526 3) Properly handle extraneous NULL package elements.
4528 Added support to avoid the possibility of infinite loops when traversing
4529 object linked lists. Never allow an infinite loop, even in the face of
4530 corrupted object lists.
4532 ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
4533 pack(pop) directives to ensure that the ACPICA headers are independent of
4534 compiler settings or other host headers.
4536 Example Code and Data Size: These are the sizes for the OS-independent
4537 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4538 debug version of the code includes the debug output trace mechanism and
4539 has a much larger code and data size.
4542 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
4543 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
4545 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
4546 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
4549 2) iASL Compiler/Disassembler and Tools:
4551 iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
4552 first reserved field was incorrectly forced to have a value of zero. This
4553 change correctly forces the field to have a value of one. ACPICA BZ 1081.
4555 Debugger: Added missing support for the "Extra" and "Data" subobjects
4556 when displaying object data.
4558 Debugger: Added support to display entire object linked lists when
4559 displaying object data.
4561 iASL: Removed the obsolete -g option to obtain ACPI tables from the
4562 Windows registry. This feature has been superseded by the acpidump
4566 ----------------------------------------
4567 14 January 2014. Summary of changes for version 20140114:
4569 1) ACPICA kernel-resident subsystem:
4571 Updated all ACPICA copyrights and signons to 2014. Added the 2014
4572 copyright to all module headers and signons, including the standard Linux
4573 header. This affects virtually every file in the ACPICA core subsystem,
4574 iASL compiler, all ACPICA utilities, and the test suites.
4576 Improved parameter validation for AcpiInstallGpeBlock. Added the
4578 1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
4579 2) There is not already a GPE block attached to the device.
4580 Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
4583 Correctly support "references" in the ACPI_OBJECT. This change fixes the
4584 support to allow references (namespace nodes) to be passed as arguments
4585 to control methods via the evaluate object interface. This is probably
4586 most useful for testing purposes, however.
4588 Improved support for 32/64 bit physical addresses in printf()-like
4589 output. This change improves the support for physical addresses in printf
4590 debug statements and other output on both 32-bit and 64-bit hosts. It
4591 consistently outputs the appropriate number of bytes for each host. The
4592 %p specifier is unsatisfactory since it does not emit uniform output on
4593 all hosts/clib implementations (on some, leading zeros are not supported,
4594 leading to difficult-to-read output).
4596 Example Code and Data Size: These are the sizes for the OS-independent
4597 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4598 debug version of the code includes the debug output trace mechanism and
4599 has a much larger code and data size.
4602 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
4603 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
4605 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
4606 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
4609 2) iASL Compiler/Disassembler and Tools:
4611 iASL: Fix a possible fault when using the Connection() operator. Fixes a
4612 problem if the parent Field definition for the Connection operator refers
4613 to an operation region that does not exist. ACPICA BZ 1064.
4615 AcpiExec: Load of local test tables is now optional. The utility has the
4616 capability to load some various tables to test features of ACPICA.
4617 However, there are enough of them that the output of the utility became
4618 confusing. With this change, only the required local tables are displayed
4619 (RSDP, XSDT, etc.) along with the actual tables loaded via the command
4620 line specification. This makes the default output simler and easier to
4621 understand. The -el command line option restores the original behavior
4622 for testing purposes.
4624 AcpiExec: Added support for overlapping operation regions. This change
4625 expands the simulation of operation regions by supporting regions that
4626 overlap within the given address space. Supports SystemMemory and
4627 SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
4629 AcpiExec: Added region handler support for PCI_Config and EC spaces. This
4630 allows AcpiExec to simulate these address spaces, similar to the current
4631 support for SystemMemory and SystemIO.
4633 Debugger: Added new command to read/write/compare all namespace objects.
4634 The command "test objects" will exercise the entire namespace by writing
4635 new values to each data object, and ensuring that the write was
4636 successful. The original value is then restored and verified.
4638 Debugger: Added the "test predefined" command. This change makes this
4639 test public and puts it under the new "test" command. The test executes
4640 each and every predefined name within the current namespace.
4643 ----------------------------------------
4644 18 December 2013. Summary of changes for version 20131218:
4646 Global note: The ACPI 5.0A specification was released this month. There
4647 are no changes needed for ACPICA since this release of ACPI is an
4648 errata/clarification release. The specification is available at
4652 1) ACPICA kernel-resident subsystem:
4654 Added validation of the XSDT root table if it is present. Some older
4655 platforms contain an XSDT that is ill-formed or otherwise invalid (such
4656 as containing some or all entries that are NULL pointers). This change
4657 adds a new function to validate the XSDT before actually using it. If the
4658 XSDT is found to be invalid, ACPICA will now automatically fall back to
4659 using the RSDT instead. Original implementation by Zhao Yakui. Ported to
4660 ACPICA and enhanced by Lv Zheng and Bob Moore.
4662 Added a runtime option to ignore the XSDT and force the use of the RSDT.
4663 This change adds a runtime option that will force ACPICA to use the RSDT
4664 instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
4665 requires that an XSDT be used instead of the RSDT, the XSDT has been
4666 found to be corrupt or ill-formed on some machines. Lv Zheng.
4668 Added a runtime option to favor 32-bit FADT register addresses over the
4669 64-bit addresses. This change adds an option to favor 32-bit FADT
4670 addresses when there is a conflict between the 32-bit and 64-bit versions
4671 of the same register. The default behavior is to use the 64-bit version
4672 in accordance with the ACPI specification. This can now be overridden via
4673 the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
4675 During the change above, the internal "Convert FADT" and "Verify FADT"
4676 functions have been merged to simplify the code, making it easier to
4677 understand and maintain. ACPICA BZ 933.
4679 Improve exception reporting and handling for GPE block installation.
4680 Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
4681 status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
4683 Added helper macros to extract bus/segment numbers from the HEST table.
4684 This change adds two macros to extract the encoded bus and segment
4685 numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
4686 Betty Dall <betty.dall@hp.com>
4688 Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
4689 by ACPICA. It is not a public macro, so it should have no effect on
4690 existing OSV code. Lv Zheng.
4692 Example Code and Data Size: These are the sizes for the OS-independent
4693 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4694 debug version of the code includes the debug output trace mechanism and
4695 has a much larger code and data size.
4698 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
4699 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
4701 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
4702 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
4705 2) iASL Compiler/Disassembler and Tools:
4707 Disassembler: Improved pathname support for emitted External()
4708 statements. This change adds full pathname support for external names
4709 that have been resolved internally by the inclusion of additional ACPI
4710 tables (via the iASL -e option). Without this change, the disassembler
4711 can emit multiple externals for the same object, or it become confused
4712 when the Scope() operator is used on an external object. Overall, greatly
4713 improves the ability to actually recompile the emitted ASL code when
4714 objects a referenced across multiple ACPI tables. Reported by Michael
4715 Tsirkin (mst@redhat.com).
4717 Tests/ASLTS: Updated functional control suite to execute with no errors.
4718 David Box. Fixed several errors related to the testing of the interpreter
4719 slack mode. Lv Zheng.
4721 iASL: Added support to detect names that are declared within a control
4722 method, but are unused (these are temporary names that are only valid
4723 during the time the method is executing). A remark is issued for these
4724 cases. ACPICA BZ 1022.
4726 iASL: Added full support for the DBG2 table. Adds full disassembler,
4727 table compiler, and template generator support for the DBG2 table (Debug
4730 iASL: Added full support for the PCCT table, update the table definition.
4731 Updates the PCCT table definition in the actbl3.h header and adds table
4732 compiler and template generator support.
4734 iASL: Added an option to emit only error messages (no warnings/remarks).
4735 The -ve option will enable only error messages, warnings and remarks are
4736 suppressed. This can simplify debugging when only the errors are
4737 important, such as when an ACPI table is disassembled and there are many
4738 warnings and remarks -- but only the actual errors are of real interest.
4740 Example ACPICA code (source/tools/examples): Updated the example code so
4741 that it builds to an actual working program, not just example code. Added
4742 ACPI tables and execution of an example control method in the DSDT. Added
4743 makefile support for Unix generation.
4746 ----------------------------------------
4747 15 November 2013. Summary of changes for version 20131115:
4749 This release is available at https://acpica.org/downloads
4752 1) ACPICA kernel-resident subsystem:
4754 Resource Manager: Fixed loop termination for the "get AML length"
4755 function. The loop previously had an error termination on a NULL resource
4756 pointer, which can never happen since the loop simply increments a valid
4757 resource pointer. This fix changes the loop to terminate with an error on
4758 an invalid end-of-buffer condition. The problem can be seen as an
4759 infinite loop by callers to AcpiSetCurrentResources with an invalid or
4760 corrupted resource descriptor, or a resource descriptor that is missing
4761 an END_TAG descriptor. Reported by Dan Carpenter
4762 <dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
4764 Table unload and ACPICA termination: Delete all attached data objects
4765 during namespace node deletion. This fix updates namespace node deletion
4766 to delete the entire list of attached objects (attached via
4767 AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
4768 1024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
4770 ACPICA termination: Added support to delete all objects attached to the
4771 root namespace node. This fix deletes any and all objects that have been
4772 attached to the root node via AcpiAttachData. Previously, none of these
4773 objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
4775 Debug output: Do not emit the function nesting level for the in-kernel
4776 build. The nesting level is really only useful during a single-thread
4777 execution. Therefore, only enable this output for the AcpiExec utility.
4778 Also, only emit the thread ID when executing under AcpiExec (Context
4779 switches are still always detected and a message is emitted). ACPICA BZ
4782 Example Code and Data Size: These are the sizes for the OS-independent
4783 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4784 debug version of the code includes the debug output trace mechanism and
4785 has a much larger code and data size.
4788 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
4789 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
4791 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
4792 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
4795 2) iASL Compiler/Disassembler and Tools:
4797 AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
4798 correct portable POSIX header for terminal control functions.
4800 Disassembler: Fixed control method invocation issues related to the use
4801 of the CondRefOf() operator. The problem is seen in the disassembly where
4802 control method invocations may not be disassembled properly if the
4803 control method name has been used previously as an argument to CondRefOf.
4804 The solution is to not attempt to emit an external declaration for the
4805 CondRefOf target (it is not necessary in the first place). This prevents
4806 disassembler object type confusion. ACPICA BZ 988.
4808 Unix Makefiles: Added an option to disable compiler optimizations and the
4809 _FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
4810 with optimizations (reportedly, gcc 4.4 for example). This change adds a
4811 command line option for make (NOOPT) that disables all compiler
4812 optimizations and the _FORTIFY_SOURCE compiler flag. The default
4813 optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
4814 1034. Lv Zheng, Bob Moore.
4816 Tests/ASLTS: Added options to specify individual test cases and modes.
4817 This allows testers running aslts.sh to optionally specify individual
4818 test modes and test cases. Also added an option to disable the forced
4819 generation of the ACPICA tools from source if desired. Lv Zheng.
4821 ----------------------------------------
4822 27 September 2013. Summary of changes for version 20130927:
4824 This release is available at https://acpica.org/downloads
4827 1) ACPICA kernel-resident subsystem:
4829 Fixed a problem with store operations to reference objects. This change
4830 fixes a problem where a Store operation to an ArgX object that contained
4832 reference to a field object did not complete the automatic dereference
4834 then write to the actual field object. Instead, the object type of the
4835 field object was inadvertently changed to match the type of the source
4836 operand. The new behavior will actually write to the field object (buffer
4837 field or field unit), thus matching the correct ACPI-defined behavior.
4839 Implemented support to allow the host to redefine individual OSL
4840 prototypes. This change enables the host to redefine OSL prototypes found
4841 in the acpiosxf.h file. This allows the host to implement OSL interfaces
4842 with a macro or inlined function. Further, it allows the host to add any
4843 additional required modifiers such as __iomem, __init, __exit, etc., as
4844 necessary on a per-interface basis. Enables maximum flexibility for the
4845 OSL interfaces. Lv Zheng.
4847 Hardcoded the access width for the FADT-defined reset register. The ACPI
4848 specification requires the reset register width to be 8 bits. ACPICA now
4849 hardcodes the width to 8 and ignores the FADT width value. This provides
4850 compatibility with other ACPI implementations that have allowed BIOS code
4851 with bad register width values to go unnoticed. Matthew Garett, Bob
4855 Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
4857 in the OSL header (acpiosxf). The change modifies the position of this
4858 macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
4859 build issues if the OSL defines the implementation of the interface to be
4860 an inline stub function. Lv Zheng.
4862 Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
4863 initialization interfaces. This change adds a new macro for the main init
4864 and terminate external interfaces in order to support hosts that require
4865 additional or different processing for these functions. Changed from
4866 ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
4869 Cleaned up the memory allocation macros for configurability. In the
4871 case, the ACPI_ALLOCATE and related macros now resolve directly to their
4872 respective AcpiOs* OSL interfaces. Two options:
4873 1) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
4874 default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
4875 2) For AcpiExec (and for debugging), the macros can optionally be
4877 to the local ACPICA interfaces that track each allocation (local tracking
4878 is used to immediately detect memory leaks).
4881 Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
4882 to predefine this macro to either TRUE or FALSE during the system build.
4884 Replaced __FUNCTION_ with __func__ in the gcc-specific header.
4886 Example Code and Data Size: These are the sizes for the OS-independent
4887 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4888 debug version of the code includes the debug output trace mechanism and
4889 has a much larger code and data size.
4892 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
4893 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
4895 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
4896 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4899 2) iASL Compiler/Disassembler and Tools:
4901 iASL: Implemented wildcard support for the -e option. This simplifies use
4902 when there are many SSDTs that must be included to resolve external
4904 declarations. ACPICA BZ 1041. Example:
4905 iasl -e ssdt*.dat -d dsdt.dat
4907 AcpiExec: Add history/line-editing for Unix/Linux systems. This change
4908 adds a portable module that implements full history and limited line
4909 editing for Unix and Linux systems. It does not use readline() due to
4910 portability issues. Instead it uses the POSIX termio interface to put the
4911 terminal in raw input mode so that the various special keys can be
4913 (such as up/down-arrow for history support and left/right-arrow for line
4914 editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
4916 AcpiXtract: Add support to handle (ignore) "empty" lines containing only
4917 one or more spaces. This provides compatible with early or different
4918 versions of the AcpiDump utility. ACPICA BZ 1044.
4920 AcpiDump: Do not ignore tables that contain only an ACPI table header.
4921 Apparently, some BIOSs create SSDTs that contain an ACPI table header but
4922 no other data. This change adds support to dump these tables. Any tables
4923 shorter than the length of an ACPI table header remain in error (an error
4924 message is emitted). Reported by Yi Li.
4926 Debugger: Echo actual command along with the "unknown command" message.
4928 ----------------------------------------
4929 23 August 2013. Summary of changes for version 20130823:
4931 1) ACPICA kernel-resident subsystem:
4933 Implemented support for host-installed System Control Interrupt (SCI)
4934 handlers. Certain ACPI functionality requires the host to handle raw
4935 SCIs. For example, the "SCI Doorbell" that is defined for memory power
4936 state support requires the host device driver to handle SCIs to examine
4937 if the doorbell has been activated. Multiple SCI handlers can be
4938 installed to allow for future expansion. New external interfaces are
4939 AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
4940 details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
4942 Operation region support: Never locally free the handler "context"
4943 pointer. This change removes some dangerous code that attempts to free
4944 the handler context pointer in some (rare) circumstances. The owner of
4945 the handler owns this pointer and the ACPICA code should never touch it.
4946 Although not seen to be an issue in any kernel, it did show up as a
4947 problem (fault) under AcpiExec. Also, set the internal storage field for
4948 the context pointer to zero when the region is deactivated, simply for
4949 sanity. David Box. ACPICA BZ 1039.
4951 AcpiRead: On error, do not modify the return value target location. If an
4952 error happens in the middle of a split 32/32 64-bit I/O operation, do not
4953 modify the target of the return value pointer. Makes the code consistent
4954 with the rest of ACPICA. Bjorn Helgaas.
4956 Example Code and Data Size: These are the sizes for the OS-independent
4957 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4958 debug version of the code includes the debug output trace mechanism and
4959 has a much larger code and data size.
4962 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
4963 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4965 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
4966 Debug Version: 185.4K Code, 77.1K Data, 262.5K Total
4969 2) iASL Compiler/Disassembler and Tools:
4971 AcpiDump: Implemented several new features and fixed some problems:
4972 1) Added support to dump the RSDP, RSDT, and XSDT tables.
4973 2) Added support for multiple table instances (SSDT, UEFI).
4974 3) Added option to dump "customized" (overridden) tables (-c).
4975 4) Fixed a problem where some table filenames were improperly
4977 5) Improved some error messages, removed some unnecessary messages.
4979 iASL: Implemented additional support for disassembly of ACPI tables that
4980 contain invocations of external control methods. The -fe<file> option
4981 allows the import of a file that specifies the external methods along
4982 with the required number of arguments for each -- allowing for the
4983 correct disassembly of the table. This is a workaround for a limitation
4984 of AML code where the disassembler often cannot determine the number of
4985 arguments required for an external control method and generates incorrect
4986 ASL code. See the iASL reference for details. ACPICA BZ 1030.
4988 Debugger: Implemented a new command (paths) that displays the full
4989 pathnames (namepaths) and object types of all objects in the namespace.
4990 This is an alternative to the namespace command.
4992 Debugger: Implemented a new command (sci) that invokes the SCI dispatch
4993 mechanism and any installed handlers.
4995 iASL: Fixed a possible segfault for "too many parent prefixes" condition.
4996 This can occur if there are too many parent prefixes in a namepath (for
4997 example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
4999 Application OSLs: Set the return value for the PCI read functions. These
5000 functions simply return AE_OK, but should set the return value to zero
5001 also. This change implements this. ACPICA BZ 1038.
5003 Debugger: Prevent possible command line buffer overflow. Increase the
5004 size of a couple of the debugger line buffers, and ensure that overflow
5005 cannot happen. ACPICA BZ 1037.
5007 iASL: Changed to abort immediately on serious errors during the parsing
5008 phase. Due to the nature of ASL, there is no point in attempting to
5009 compile these types of errors, and they typically end up causing a
5010 cascade of hundreds of errors which obscure the original problem.
5012 ----------------------------------------
5013 25 July 2013. Summary of changes for version 20130725:
5015 1) ACPICA kernel-resident subsystem:
5017 Fixed a problem with the DerefOf operator where references to FieldUnits
5018 and BufferFields incorrectly returned the parent object, not the actual
5019 value of the object. After this change, a dereference of a FieldUnit
5020 reference results in a read operation on the field to get the value, and
5021 likewise, the appropriate BufferField value is extracted from the target
5024 Fixed a problem where the _WAK method could cause a fault under these
5025 circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
5026 method returned no value. The problem is rarely seen because most kernels
5027 run ACPICA in slack mode.
5029 For the DerefOf operator, a fatal error now results if an attempt is made
5030 to dereference a reference (created by the Index operator) to a NULL
5031 package element. Provides compatibility with other ACPI implementations,
5032 and this behavior will be added to a future version of the ACPI
5035 The ACPI Power Management Timer (defined in the FADT) is now optional.
5036 This provides compatibility with other ACPI implementations and will
5037 appear in the next version of the ACPI specification. If there is no PM
5038 Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
5039 zero in the FADT indicates no PM timer.
5041 Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
5042 allows the host to globally enable/disable all vendor strings, all
5043 feature strings, or both. Intended to be primarily used for debugging
5044 purposes only. Lv Zheng.
5046 Expose the collected _OSI data to the host via a global variable. This
5047 data tracks the highest level vendor ID that has been invoked by the BIOS
5048 so that the host (and potentially ACPICA itself) can change behaviors
5049 based upon the age of the BIOS.
5051 Example Code and Data Size: These are the sizes for the OS-independent
5052 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5053 debug version of the code includes the debug output trace mechanism and
5054 has a much larger code and data size.
5057 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
5058 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
5060 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
5061 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
5064 2) iASL Compiler/Disassembler and Tools:
5066 iASL: Created the following enhancements for the -so option (create
5068 1)Add offsets for the last nameseg in each namepath for every supported
5070 2)Add support for Processor, Device, Thermal Zone, and Scope objects
5071 3)Add the actual AML opcode for the parent object of every supported
5073 4)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
5075 Disassembler: Emit all unresolved external symbols in a single block.
5076 These are external references to control methods that could not be
5077 resolved, and thus, the disassembler had to make a guess at the number of
5080 iASL: The argument to the -T option (create table template) is now
5081 optional. If not specified, the default table is a DSDT, typically the
5084 ----------------------------------------
5085 26 June 2013. Summary of changes for version 20130626:
5087 1) ACPICA kernel-resident subsystem:
5089 Fixed an issue with runtime repair of the _CST object. Null or invalid
5090 elements were not always removed properly. Lv Zheng.
5092 Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
5093 FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
5094 the maximum number of GPEs is 1016. Use of multiple GPE block devices
5095 makes the system-wide number of GPEs essentially unlimited.
5097 Example Code and Data Size: These are the sizes for the OS-independent
5098 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5099 debug version of the code includes the debug output trace mechanism and
5100 has a much larger code and data size.
5103 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
5104 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
5106 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
5107 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
5110 2) iASL Compiler/Disassembler and Tools:
5112 Portable AcpiDump: Implemented full support for the Linux and FreeBSD
5113 hosts. Now supports Linux, FreeBSD, and Windows.
5115 Disassembler: Added some missing types for the HEST and EINJ tables: "Set
5116 Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
5118 iASL/Preprocessor: Implemented full support for nested
5119 #if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
5121 Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
5122 max. The original purpose of this constraint was to limit the amount of
5123 debug output. However, the string function in question (UtPrintString) is
5124 now used for the disassembler also, where 256 bytes is insufficient.
5125 Reported by RehabMan@GitHub.
5127 iASL/DataTables: Fixed some problems and issues with compilation of DMAR
5128 tables. ACPICA BZ 999. Lv Zheng.
5130 iASL: Fixed a couple of error exit issues that could result in a "Could
5131 not delete <file>" message during ASL compilation.
5133 AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
5134 the actual signatures for these tables are "FACP" and "APIC",
5137 AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
5138 tables are allowed to have multiple instances.
5140 ----------------------------------------
5141 17 May 2013. Summary of changes for version 20130517:
5143 1) ACPICA kernel-resident subsystem:
5145 Fixed a regression introduced in version 20130328 for _INI methods. This
5146 change fixes a problem introduced in 20130328 where _INI methods are no
5147 longer executed properly because of a memory block that was not
5148 initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
5149 <tomasz.nowicki@linaro.org>.
5151 Fixed a possible problem with the new extended sleep registers in the
5153 5.0 FADT. Do not use these registers (even if populated) unless the HW-
5154 reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
5157 Implemented return value repair code for _CST predefined objects: Sort
5159 list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
5161 Implemented a debug-only option to disable loading of SSDTs from the
5162 RSDT/XSDT during ACPICA initialization. This can be useful for debugging
5163 ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
5164 acglobal.h - ACPICA BZ 1005. Lv Zheng.
5166 Fixed some issues in the ACPICA initialization and termination code:
5167 Tomasz Nowicki <tomasz.nowicki@linaro.org>
5168 1) Clear events initialized flag upon event component termination. ACPICA
5170 2) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
5171 3) Delete global lock pending lock during termination. ACPICA BZ 1012.
5172 4) Clear debug buffer global on termination to prevent possible multiple
5173 delete. ACPICA BZ 1010.
5175 Standardized all switch() blocks across the entire source base. After
5177 years, different formatting for switch() had crept in. This change makes
5178 the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
5180 Split some files to enhance ACPICA modularity and configurability:
5181 1) Split buffer dump routines into utilities/utbuffer.c
5182 2) Split internal error message routines into utilities/uterror.c
5183 3) Split table print utilities into tables/tbprint.c
5184 4) Split iASL command-line option processing into asloptions.c
5186 Makefile enhancements:
5187 1) Support for all new files above.
5188 2) Abort make on errors from any subcomponent. Chao Guan.
5189 3) Add build support for Apple Mac OS X. Liang Qi.
5191 Example Code and Data Size: These are the sizes for the OS-independent
5192 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5193 debug version of the code includes the debug output trace mechanism and
5194 has a much larger code and data size.
5197 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
5198 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
5200 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
5201 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
5204 2) iASL Compiler/Disassembler and Tools:
5206 New utility: Implemented an easily portable version of the acpidump
5207 utility to extract ACPI tables from the system (or a file) in an ASCII
5209 dump format. The top-level code implements the various command line
5210 options, file I/O, and table dump routines. To port to a new host, only
5211 three functions need to be implemented to get tables -- since this
5212 functionality is OS-dependent. See the tools/acpidump/apmain.c module and
5213 the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
5214 1) The Windows version obtains the ACPI tables from the Registry.
5215 2) The Linux version is under development.
5216 3) Other hosts - If an OS-dependent module is submitted, it will be
5217 distributed with ACPICA.
5219 iASL: Fixed a regression for -D preprocessor option (define symbol). A
5220 restructuring/change to the initialization sequence caused this option to
5221 no longer work properly.
5223 iASL: Implemented a mechanism to disable specific warnings and remarks.
5224 Adds a new command line option, "-vw <messageid> as well as "#pragma
5225 disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
5227 iASL: Fix for too-strict package object validation. The package object
5228 validation for return values from the predefined names is a bit too
5229 strict, it does not allow names references within the package (which will
5230 be resolved at runtime.) These types of references cannot be validated at
5231 compile time. This change ignores named references within package objects
5232 for names that return or define static packages.
5234 Debugger: Fixed the 80-character command line limitation for the History
5235 command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
5237 iASL: Added control method and package support for the -so option
5238 (generates AML offset table for BIOS support.)
5240 iASL: issue a remark if a non-serialized method creates named objects. If
5241 a thread blocks within the method for any reason, and another thread
5242 enters the method, the method will fail because an attempt will be made
5244 create the same (named) object twice. In this case, issue a remark that
5245 the method should be marked serialized. NOTE: may become a warning later.
5248 ----------------------------------------
5249 18 April 2013. Summary of changes for version 20130418:
5251 1) ACPICA kernel-resident subsystem:
5253 Fixed a possible buffer overrun during some rare but specific field unit
5254 read operations. This overrun can only happen if the DSDT version is 1 --
5255 meaning that all AML integers are 32 bits -- and the field length is
5256 between 33 and 55 bits long. During the read, an internal buffer object
5258 created for the field unit because the field is larger than an integer
5260 bits). However, in this case, the buffer will be incorrectly written
5261 beyond the end because the buffer length is less than the internal
5263 of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
5264 long, but a full 8 bytes will be written.
5266 Updated the Embedded Controller "orphan" _REG method support. This refers
5267 to _REG methods under the EC device that have no corresponding operation
5268 region. This is allowed by the ACPI specification. This update removes a
5269 dependency on the existence an ECDT table. It will execute an orphan _REG
5270 method as long as the operation region handler for the EC is installed at
5271 the EC device node and not the namespace root. Rui Zhang (original
5272 update), Bob Moore (update/integrate).
5274 Implemented run-time argument typechecking for all predefined ACPI names
5275 (_STA, _BIF, etc.) This change performs object typechecking on all
5276 incoming arguments for all predefined names executed via
5277 AcpiEvaluateObject. This ensures that ACPI-related device drivers are
5278 passing correct object types as well as the correct number of arguments
5279 (therefore identifying any issues immediately). Also, the ASL/namespace
5280 definition of the predefined name is checked against the ACPI
5281 specification for the proper argument count. Adds one new file,
5284 Changed an exception code for the ASL UnLoad() operator. Changed the
5285 exception code for the case where the input DdbHandle is invalid, from
5286 AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
5288 Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
5289 global makefile. The use of this flag causes compiler errors on earlier
5290 versions of GCC, so it has been removed for compatibility.
5292 Miscellaneous cleanup:
5293 1) Removed some unused/obsolete macros
5294 2) Fixed a possible memory leak in the _OSI support
5295 3) Removed an unused variable in the predefined name support
5296 4) Windows OSL: remove obsolete reference to a memory list field
5298 Example Code and Data Size: These are the sizes for the OS-independent
5299 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5300 debug version of the code includes the debug output trace mechanism and
5301 has a much larger code and data size.
5304 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
5305 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
5307 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
5308 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
5311 2) iASL Compiler/Disassembler and Tools:
5313 AcpiExec: Added installation of a handler for the SystemCMOS address
5314 space. This prevents control method abort if a method accesses this
5317 AcpiExec: Added support for multiple EC devices, and now install EC
5318 operation region handler(s) at the actual EC device instead of the
5319 namespace root. This reflects the typical behavior of host operating
5322 AcpiExec: Updated to ensure that all operation region handlers are
5323 installed before the _REG methods are executed. This prevents a _REG
5324 method from aborting if it accesses an address space has no handler.
5325 AcpiExec installs a handler for every possible address space.
5327 Debugger: Enhanced the "handlers" command to display non-root handlers.
5328 This change enhances the handlers command to display handlers associated
5329 with individual devices throughout the namespace, in addition to the
5330 currently supported display of handlers associated with the root
5334 ASL Test Suite: Several test suite errors have been identified and
5335 resolved, reducing the total error count during execution. Chao Guan.
5337 ----------------------------------------
5338 28 March 2013. Summary of changes for version 20130328:
5340 1) ACPICA kernel-resident subsystem:
5342 Fixed several possible race conditions with the internal object reference
5343 counting mechanism. Some of the external ACPICA interfaces update object
5344 reference counts without holding the interpreter or namespace lock. This
5345 change adds a spinlock to protect reference count updates on the internal
5346 ACPICA objects. Reported by and with assistance from Andriy Gapon
5349 FADT support: Removed an extraneous warning for very large GPE register
5350 sets. This change removes a size mismatch warning if the legacy length
5351 field for a GPE register set is larger than the 64-bit GAS structure can
5352 accommodate. GPE register sets can be larger than the 255-bit width
5353 limitation of the GAS structure. Linn Crosetto (linn@hp.com).
5355 _OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
5356 return from this interface. Handles a possible timeout case if
5357 ACPI_WAIT_FOREVER is modified by the host to be a value less than
5358 "forever". Jung-uk Kim.
5360 Predefined name support: Add allowed/required argument type information
5362 the master predefined info table. This change adds the infrastructure to
5363 enable typechecking on incoming arguments for all predefined
5364 methods/objects. It does not actually contain the code that will fully
5365 utilize this information, this is still under development. Also condenses
5366 some duplicate code for the predefined names into a new module,
5367 utilities/utpredef.c
5369 Example Code and Data Size: These are the sizes for the OS-independent
5370 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5371 debug version of the code includes the debug output trace mechanism and
5372 has a much larger code and data size.
5375 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
5376 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
5378 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
5379 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
5382 2) iASL Compiler/Disassembler and Tools:
5384 iASL: Implemented a new option to simplify the development of ACPI-
5386 BIOS code. Adds support for a new "offset table" output file. The -so
5387 option will create a C table containing the AML table offsets of various
5388 named objects in the namespace so that BIOS code can modify them easily
5390 boot time. This can simplify BIOS runtime code by eliminating expensive
5391 searches for "magic values", enhancing boot times and adding greater
5392 reliability. With assistance from Lee Hamel.
5394 iASL: Allow additional predefined names to return zero-length packages.
5395 Now, all predefined names that are defined by the ACPI specification to
5396 return a "variable-length package of packages" are allowed to return a
5397 zero length top-level package. This allows the BIOS to tell the host that
5398 the requested feature is not supported, and supports existing BIOS/ASL
5401 iASL: Changed the "result not used" warning to an error. This is the case
5402 where an ASL operator is effectively a NOOP because the result of the
5403 operation is not stored anywhere. For example:
5405 There is no target (missing 3rd argument), nor is the function return
5406 value used. This is potentially a very serious problem -- since the code
5407 was probably intended to do something, but for whatever reason, the value
5408 was not stored. Therefore, this issue has been upgraded from a warning to
5411 AcpiHelp: Added allowable/required argument types to the predefined names
5412 info display. This feature utilizes the recent update to the predefined
5413 names table (above).
5415 ----------------------------------------
5416 14 February 2013. Summary of changes for version 20130214:
5418 1) ACPICA Kernel-resident Subsystem:
5420 Fixed a possible regression on some hosts: Reinstated the safe return
5421 macros (return_ACPI_STATUS, etc.) that ensure that the argument is
5422 evaluated only once. Although these macros are not needed for the ACPICA
5423 code itself, they are often used by ACPI-related host device drivers
5425 the safe feature may be necessary.
5427 Fixed several issues related to the ACPI 5.0 reduced hardware support
5428 (SOC): Now ensure that if the platform declares itself as hardware-
5430 via the FADT, the following functions become NOOPs (and always return
5431 AE_OK) because ACPI is always enabled by definition on these machines:
5437 Dynamic Object Repair: Implemented additional runtime repairs for
5438 predefined name return values. Both of these repairs can simplify code in
5439 the related device drivers that invoke these methods:
5440 1) For the _STR and _MLS names, automatically repair/convert an ASCII
5441 string to a Unicode buffer.
5442 2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
5444 lone end tag descriptor in the following cases: A Return(0) was executed,
5445 a null buffer was returned, or no object at all was returned (non-slack
5446 mode only). Adds a new file, nsconvert.c
5447 ACPICA BZ 998. Bob Moore, Lv Zheng.
5449 Resource Manager: Added additional code to prevent possible infinite
5451 while traversing corrupted or ill-formed resource template buffers. Check
5452 for zero-length resource descriptors in all code that loops through
5453 resource templates (the length field is used to index through the
5454 template). This change also hardens the external AcpiWalkResources and
5455 AcpiWalkResourceBuffer interfaces.
5457 Local Cache Manager: Enhanced the main data structure to eliminate an
5458 unnecessary mechanism to access the next object in the list. Actually
5459 provides a small performance enhancement for hosts that use the local
5460 ACPICA cache manager. Jung-uk Kim.
5462 Example Code and Data Size: These are the sizes for the OS-independent
5463 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5464 debug version of the code includes the debug output trace mechanism and
5465 has a much larger code and data size.
5468 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
5469 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
5471 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
5472 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
5475 2) iASL Compiler/Disassembler and Tools:
5477 iASL/Disassembler: Fixed several issues with the definition of the ACPI
5478 5.0 RASF table (RAS Feature Table). This change incorporates late changes
5479 that were made to the ACPI 5.0 specification.
5481 iASL/Disassembler: Added full support for the following new ACPI tables:
5482 1) The MTMR table (MID Timer Table)
5483 2) The VRTC table (Virtual Real Time Clock Table).
5484 Includes header file, disassembler, table compiler, and template support
5487 iASL: Implemented compile-time validation of package objects returned by
5488 predefined names. This new feature validates static package objects
5489 returned by the various predefined names defined to return packages. Both
5490 object types and package lengths are validated, for both parent packages
5491 and sub-packages, if any. The code is similar in structure and behavior
5493 the runtime repair mechanism within the AML interpreter and uses the
5494 existing predefined name information table. Adds a new file, aslprepkg.c.
5497 iASL: Implemented auto-detection of binary ACPI tables for disassembly.
5498 This feature detects a binary file with a valid ACPI table header and
5499 invokes the disassembler automatically. Eliminates the need to
5500 specifically invoke the disassembler with the -d option. ACPICA BZ 862.
5502 iASL/Disassembler: Added several warnings for the case where there are
5503 unresolved control methods during the disassembly. This can potentially
5504 cause errors when the output file is compiled, because the disassembler
5505 assumes zero method arguments in these cases (it cannot determine the
5506 actual number of arguments without resolution/definition of the method).
5508 Debugger: Added support to display all resources with a single command.
5509 Invocation of the resources command with no arguments will now display
5511 resources within the current namespace.
5513 AcpiHelp: Added descriptive text for each ACPICA exception code displayed
5516 ----------------------------------------
5517 17 January 2013. Summary of changes for version 20130117:
5519 1) ACPICA Kernel-resident Subsystem:
5521 Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
5522 return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
5523 objects to return a package containing one integer, most BIOS code
5525 two integers and the previous code reflects that. However, we also need
5527 support BIOS code that actually implements to the ACPI spec, and this
5528 change reflects this.
5530 Fixed two issues with the ACPI_DEBUG_PRINT macros:
5531 1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
5532 C compilers that require this support.
5533 2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
5534 ACPI_DEBUG is already used by many of the various hosts.
5536 Updated all ACPICA copyrights and signons to 2013. Added the 2013
5537 copyright to all module headers and signons, including the standard Linux
5538 header. This affects virtually every file in the ACPICA core subsystem,
5539 iASL compiler, all ACPICA utilities, and the test suites.
5541 Example Code and Data Size: These are the sizes for the OS-independent
5542 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5543 debug version of the code includes the debug output trace mechanism and
5544 has a much larger code and data size.
5547 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
5548 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
5550 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
5551 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
5554 2) iASL Compiler/Disassembler and Tools:
5556 Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
5557 prevent a possible fault on some hosts. Some C libraries modify the arg
5558 pointer parameter to vfprintf making it difficult to call it twice in the
5559 AcpiOsVprintf function. Use a local buffer to workaround this issue. This
5560 does not affect the Windows OSL since the Win C library does not modify
5561 the arg pointer. Chao Guan, Bob Moore.
5563 iASL: Fixed a possible infinite loop when the maximum error count is
5564 reached. If an output file other than the .AML file is specified (such as
5565 a listing file), and the maximum number of errors is reached, do not
5566 attempt to flush data to the output file(s) as the compiler is aborting.
5567 This can cause an infinite loop as the max error count code essentially
5568 keeps calling itself.
5570 iASL/Disassembler: Added an option (-in) to ignore NOOP
5572 Implemented for both the compiler and the disassembler. Often, the NOOP
5573 opcode is used as padding for packages that are changed dynamically by
5575 BIOS. When disassembled and recompiled, these NOOPs will cause syntax
5576 errors. This option causes the disassembler to ignore all NOOP opcodes
5577 (0xA3), and it also causes the compiler to ignore all ASL source code
5581 Debugger: Enhanced the Sleep command to execute all sleep states. This
5582 change allows Sleep to be invoked with no arguments and causes the
5583 debugger to execute all of the sleep states, 0-5, automatically.
5585 ----------------------------------------
5586 20 December 2012. Summary of changes for version 20121220:
5588 1) ACPICA Kernel-resident Subsystem:
5590 Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
5591 alternate entry point for AcpiWalkResources and improves the usability of
5592 the resource manager by accepting as input a buffer containing the output
5593 of either a _CRS, _PRS, or _AEI method. The key functionality is that the
5594 input buffer is not deleted by this interface so that it can be used by
5595 the host later. See the ACPICA reference for details.
5597 Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
5598 (DSDT version < 2). The constant will be truncated and this warning
5599 reflects that behavior.
5601 Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
5602 ExtendedInterrupt, and GpioInt descriptors. This change adds support to
5603 both get and set the new wake bit in these descriptors, separately from
5604 the existing share bit. Reported by Aaron Lu.
5606 Interpreter: Fix Store() when an implicit conversion is not possible. For
5607 example, in the cases such as a store of a string to an existing package
5608 object, implement the store as a CopyObject(). This is a small departure
5609 from the ACPI specification which states that the control method should
5611 aborted in this case. However, the ASLTS suite depends on this behavior.
5613 Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
5614 macros: check if debug output is currently enabled as soon as possible to
5615 minimize performance impact if debug is in fact not enabled.
5617 Source code restructuring: Cleanup to improve modularity. The following
5618 new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
5619 psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
5620 Associated makefiles and project files have been updated.
5622 Changed an exception code for LoadTable operator. For the case where one
5623 of the input strings is too long, change the returned exception code from
5624 AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
5626 Fixed a possible memory leak in dispatcher error path. On error, delete
5627 the mutex object created during method mutex creation. Reported by
5628 tim.gardner@canonical.com.
5630 Example Code and Data Size: These are the sizes for the OS-independent
5631 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5632 debug version of the code includes the debug output trace mechanism and
5633 has a much larger code and data size.
5636 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
5637 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
5639 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
5640 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
5643 2) iASL Compiler/Disassembler and Tools:
5645 iASL: Disallow a method call as argument to the ObjectType ASL operator.
5646 This change tracks an errata to the ACPI 5.0 document. The AML grammar
5647 will not allow the interpreter to differentiate between a method and a
5648 method invocation when these are used as an argument to the ObjectType
5649 operator. The ACPI specification change is to disallow a method
5651 (UserTerm) for the ObjectType operator.
5653 Finish support for the TPM2 and CSRT tables in the headers, table
5654 compiler, and disassembler.
5656 Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
5657 always expires immediately if the semaphore is not available. The
5659 code was using a relative-time timeout, but sem_timedwait requires the
5661 of an absolute time.
5663 iASL: Added a remark if the Timer() operator is used within a 32-bit
5664 table. This operator returns a 64-bit time value that will be truncated
5665 within a 32-bit table.
5667 iASL Source code restructuring: Cleanup to improve modularity. The
5668 following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
5669 aslmethod.c, and aslfileio.c. Associated makefiles and project files have
5673 ----------------------------------------
5674 14 November 2012. Summary of changes for version 20121114:
5676 1) ACPICA Kernel-resident Subsystem:
5678 Implemented a performance enhancement for ACPI/AML Package objects. This
5679 change greatly increases the performance of Package objects within the
5680 interpreter. It changes the processing of reference counts for packages
5682 optimizing for the most common case where the package sub-objects are
5683 either Integers, Strings, or Buffers. Increases the overall performance
5685 the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
5687 Chao Guan. ACPICA BZ 943.
5689 Implemented and deployed common macros to extract flag bits from resource
5690 descriptors. Improves readability and maintainability of the code. Fixes
5692 problem with the UART serial bus descriptor for the number of data bits
5693 flags (was incorrectly 2 bits, should be 3).
5695 Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
5696 of the macros and changed the SETx macros to the style of (destination,
5697 source). Also added ACPI_CASTx companion macros. Lv Zheng.
5699 Example Code and Data Size: These are the sizes for the OS-independent
5700 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5701 debug version of the code includes the debug output trace mechanism and
5702 has a much larger code and data size.
5705 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
5706 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
5708 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
5709 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
5712 2) iASL Compiler/Disassembler and Tools:
5714 Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
5715 adds the ShareAndWake and ExclusiveAndWake flags which were added to the
5716 Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
5718 Disassembler: Fixed a problem with external declaration generation. Fixes
5719 a problem where an incorrect pathname could be generated for an external
5720 declaration if the original reference to the object includes leading
5721 carats (^). ACPICA BZ 984.
5723 Debugger: Completed a major update for the Disassemble<method> command.
5724 This command was out-of-date and did not properly disassemble control
5725 methods that had any reasonable complexity. This fix brings the command
5727 to the same level as the rest of the disassembler. Adds one new file,
5728 dmdeferred.c, which is existing code that is now common with the main
5729 disassembler and the debugger disassemble command. ACPICA MZ 978.
5731 iASL: Moved the parser entry prototype to avoid a duplicate declaration.
5732 Newer versions of Bison emit this prototype, so moved the prototype out
5734 the iASL header to where it is actually used in order to avoid a
5738 iASL/Tools: Standardized use of the stream I/O functions:
5739 1) Ensure check for I/O error after every fopen/fread/fwrite
5740 2) Ensure proper order of size/count arguments for fread/fwrite
5741 3) Use test of (Actual != Requested) after all fwrite, and most fread
5742 4) Standardize I/O error messages
5743 Improves reliability and maintainability of the code. Bob Moore, Lv
5747 Disassembler: Prevent duplicate External() statements. During generation
5748 of external statements, detect similar pathnames that are actually
5749 duplicates such as these:
5752 Remove all leading '\' characters from pathnames during the external
5753 statement generation so that duplicates will be detected and tossed.
5756 Tools: Replace low-level I/O with stream I/O functions. Replace
5757 open/read/write/close with the stream I/O equivalents
5758 fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
5761 AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
5762 name header so that AcpiXtract recognizes the output file/table.
5764 iASL: Remove obsolete -2 option flag. Originally intended to force the
5765 compiler/disassembler into an ACPI 2.0 mode, this was never implemented
5766 and the entire concept is now obsolete.
5768 ----------------------------------------
5769 18 October 2012. Summary of changes for version 20121018:
5772 1) ACPICA Kernel-resident Subsystem:
5774 Updated support for the ACPI 5.0 MPST table. Fixes some problems
5775 introduced by late changes to the table as it was added to the ACPI 5.0
5776 specification. Includes header, disassembler, and data table compiler
5777 support as well as a new version of the MPST template.
5779 AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
5780 5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
5781 methods: _HID, _CID, and _UID.
5783 Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
5784 ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
5785 name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
5786 names for their various drivers. Affects the AcpiGetObjectInfo external
5787 interface, and other internal interfaces as well.
5789 Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
5790 This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
5791 on machines that support non-aligned transfers. Optimizes for this case
5792 rather than using a strncpy. With assistance from Zheng Lv.
5794 Resource Manager: Small fix for buffer size calculation. Fixed a one byte
5795 error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
5797 Added a new debug print message for AML mutex objects that are force-
5798 released. At control method termination, any currently acquired mutex
5799 objects are force-released. Adds a new debug-only message for each one
5802 Audited/updated all ACPICA return macros and the function debug depth
5803 counter: 1) Ensure that all functions that use the various TRACE macros
5804 also use the appropriate ACPICA return macros. 2) Ensure that all normal
5805 return statements surround the return expression (value) with parens to
5806 ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
5807 Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
5809 Global source code changes/maintenance: All extra lines at the start and
5810 end of each source file have been removed for consistency. Also, within
5811 comments, all new sentences start with a single space instead of a double
5812 space, again for consistency across the code base.
5814 Example Code and Data Size: These are the sizes for the OS-independent
5815 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5816 debug version of the code includes the debug output trace mechanism and
5817 has a much larger code and data size.
5820 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
5821 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
5823 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
5824 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
5827 2) iASL Compiler/Disassembler and Tools:
5829 AcpiExec: Improved the algorithm used for memory leak/corruption
5830 detection. Added some intelligence to the code that maintains the global
5831 list of allocated memory. The list is now ordered by allocated memory
5832 address, significantly improving performance. When running AcpiExec on
5833 the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
5834 on the platform and/or the environment. Note, this performance
5835 enhancement affects the AcpiExec utility only, not the kernel-resident
5838 Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
5839 the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
5840 incorrect table offset reported for invalid opcodes. Report the original
5841 32-bit value for bad ACPI_NAMEs (as well as the repaired name.)
5843 Disassembler: Enhanced the -vt option to emit the binary table data in
5844 hex format to assist with debugging.
5846 Fixed a potential filename buffer overflow in osunixdir.c. Increased the
5847 size of file structure. Colin Ian King.
5849 ----------------------------------------
5850 13 September 2012. Summary of changes for version 20120913:
5853 1) ACPICA Kernel-resident Subsystem:
5855 ACPI 5.0: Added two new notify types for the Hardware Error Notification
5856 Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
5860 Table Manager: Merged/removed duplicate code in the root table resize
5861 functions. One function is external, the other is internal. Lv Zheng,
5865 Makefiles: Completely removed the obsolete "Linux" makefiles under
5866 acpica/generate/linux. These makefiles are obsolete and have been
5869 the generic unix makefiles under acpica/generate/unix.
5871 Makefiles: Ensure that binary files always copied properly. Minor rule
5873 to ensure that the final binary output files are always copied up to the
5874 appropriate binary directory (bin32 or bin64.)
5876 Example Code and Data Size: These are the sizes for the OS-independent
5877 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5879 version of the code includes the debug output trace mechanism and has a
5881 larger code and data size.
5884 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
5885 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
5887 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
5888 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
5891 2) iASL Compiler/Disassembler and Tools:
5893 Disassembler: Fixed a possible fault during the disassembly of resource
5894 descriptors when a second parse is required because of the invocation of
5895 external control methods within the table. With assistance from
5896 adq@lidskialf.net. ACPICA BZ 976.
5898 iASL: Fixed a namepath optimization problem. An error can occur if the
5900 node that contains the namepath to be optimized does not have a parent
5902 that is a named object. This change fixes the problem.
5904 iASL: Fixed a regression where the AML file is not deleted on errors. The
5906 output file should be deleted if there are any errors during the
5909 only exception is if the -f (force output) option is used. ACPICA BZ 974.
5911 iASL: Added a feature to automatically increase internal line buffer
5913 Via realloc(), automatically increase the internal line buffer sizes as
5914 necessary to support very long source code lines. The current version of
5916 preprocessor requires a buffer long enough to contain full source code
5918 This change increases the line buffer(s) if the input lines go beyond the
5919 current buffer size. This eliminates errors that occurred when a source
5921 line was longer than the buffer.
5923 iASL: Fixed a problem with constant folding in method declarations. The
5924 SyncLevel term is a ByteConstExpr, and incorrect code would be generated
5926 Type3 opcode was used.
5928 Debugger: Improved command help support. For incorrect argument count,
5930 full help for the command. For help command itself, allow an argument to
5933 Test Suites: Several bug fixes for the ASLTS suite reduces the number of
5934 errors during execution of the suite. Guan Chao.
5936 ----------------------------------------
5937 16 August 2012. Summary of changes for version 20120816:
5940 1) ACPICA Kernel-resident Subsystem:
5942 Removed all use of the deprecated _GTS and _BFS predefined methods. The
5944 (Going To Sleep) and _BFS (Back From Sleep) methods are essentially
5945 deprecated and will probably be removed from the ACPI specification.
5947 does not invoke them, and reportedly never will. The final nail in the
5949 is that the ACPI specification states that these methods must be run with
5950 interrupts off, which is not going to happen in a kernel interpreter.
5952 Linux has removed all use of the methods also. It was discovered that
5953 invoking these functions caused failures on some machines, probably
5955 they were never tested since Windows does not call them. Affects two
5957 interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
5960 Implemented support for complex bit-packed buffers returned from the _PLD
5961 (Physical Location of Device) predefined method. Adds a new external
5962 interface, AcpiDecodePldBuffer that parses the buffer into a more usable
5964 structure. Note: C Bitfields cannot be used for this type of predefined
5965 structure since the memory layout of individual bitfields is not defined
5967 the C language. In addition, there are endian concerns where a compiler
5969 change the bitfield ordering based on the machine type. The new ACPICA
5970 interface eliminates these issues, and should be called after _PLD is
5971 executed. ACPICA BZ 954.
5973 Implemented a change to allow a scope change to root (via "Scope (\)")
5975 execution of module-level ASL code (code that is executed at table load
5978 Added the Windows8/Server2012 string for the _OSI method. This change
5981 new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
5984 Added header support for the new ACPI tables DBG2 (Debug Port Table Type
5986 and CSRT (Core System Resource Table).
5988 Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
5989 names. This simplifies access to the buffers returned by these predefined
5990 names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
5992 GPE support: Removed an extraneous parameter from the various low-level
5993 internal GPE functions. Tang Feng.
5995 Removed the linux makefiles from the unix packages. The generate/linux
5996 makefiles are obsolete and have been removed from the unix tarball
5998 packages. The replacement makefiles are under generate/unix, and there is
6000 top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
6002 Updates for Unix makefiles:
6003 1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
6004 2) Update linker flags (move to end of command line) for AcpiExec
6008 Split ACPICA initialization functions to new file, utxfinit.c. Split from
6009 utxface.c to improve modularity and reduce file size.
6011 Example Code and Data Size: These are the sizes for the OS-independent
6012 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6013 debug version of the code includes the debug output trace mechanism and
6015 much larger code and data size.
6018 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
6019 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
6021 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
6022 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
6025 2) iASL Compiler/Disassembler and Tools:
6027 iASL: Fixed a problem with constant folding for fixed-length constant
6028 expressions. The constant-folding code was not being invoked for constant
6029 expressions that allow the use of type 3/4/5 opcodes to generate
6031 for expressions such as ByteConstExpr, WordConstExpr, etc. This could
6033 in the generation of invalid AML bytecode. ACPICA BZ 970.
6035 iASL: Fixed a generation issue on newer versions of Bison. Newer versions
6036 apparently automatically emit some of the necessary externals. This
6038 handles these versions in order to eliminate generation warnings.
6040 Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
6042 Disassembler: Add support to decode _PLD buffers. The decoded buffer
6044 within comments in the output file.
6046 Debugger: Fixed a regression with the "Threads" command where
6047 AE_BAD_PARAMETER was always returned.
6049 ----------------------------------------
6050 11 July 2012. Summary of changes for version 20120711:
6052 1) ACPICA Kernel-resident Subsystem:
6054 Fixed a possible fault in the return package object repair code. Fixes a
6055 problem that can occur when a lone package object is wrapped with an
6057 package object in order to force conformance to the ACPI specification.
6059 affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
6063 Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
6064 PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
6065 ARB_DIS bit must be implemented in the host-dependent C3 processor power
6067 support. Note, ARB_DIS is obsolete and only applies to older chipsets,
6069 Intel and other vendors. (for Intel: ICH4-M and earlier)
6071 This change removes the code to disable/enable bus master arbitration
6073 suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
6075 resume problems on some machines. The change has been in use for over
6079 Implemented two new external interfaces to support host-directed dynamic
6081 table load and unload. They are intended to simplify the host
6083 of hot-plug support:
6084 AcpiLoadTable: Load an SSDT from a buffer into the namespace.
6085 AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
6087 See the ACPICA reference for additional details. Adds one new file,
6088 components/tables/tbxfload.c
6090 Implemented and deployed two new interfaces for errors and warnings that
6092 known to be caused by BIOS/firmware issues:
6093 AcpiBiosError: Prints "ACPI Firmware Error" message.
6094 AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
6095 Deployed these new interfaces in the ACPICA Table Manager code for ACPI
6097 and FADT errors. Additional deployment to be completed as appropriate in
6099 future. The associated conditional macros are ACPI_BIOS_ERROR and
6100 ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
6105 Implicit notify support: ensure that no memory allocation occurs within a
6106 critical region. This fix moves a memory allocation outside of the time
6108 spinlock is held. Fixes issues on systems that do not allow this
6112 Split exception code utilities and tables into a new file,
6115 Example Code and Data Size: These are the sizes for the OS-independent
6116 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6118 version of the code includes the debug output trace mechanism and has a
6120 larger code and data size.
6123 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
6124 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
6126 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
6127 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
6130 2) iASL Compiler/Disassembler and Tools:
6132 iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
6136 Debugger: Enhanced the "tables" command to emit additional information
6138 the current set of ACPI tables, including the owner ID and flags decode.
6140 Debugger: Reimplemented the "unload" command to use the new
6141 AcpiUnloadParentTable external interface. This command was disable
6143 due to need for an unload interface.
6145 AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
6147 will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
6149 ----------------------------------------
6150 20 June 2012. Summary of changes for version 20120620:
6153 1) ACPICA Kernel-resident Subsystem:
6155 Implemented support to expand the "implicit notify" feature to allow
6157 devices to be notified by a single GPE. This feature automatically
6159 runtime device notification in the absence of a BIOS-provided GPE control
6160 method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
6162 provided by ACPICA for Windows compatibility, and is a workaround for
6165 code errors. See the description of the AcpiSetupGpeForWake interface in
6167 APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
6169 Changed some comments and internal function names to simplify and ensure
6170 correctness of the Linux code translation. No functional changes.
6172 Example Code and Data Size: These are the sizes for the OS-independent
6173 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6175 version of the code includes the debug output trace mechanism and has a
6177 larger code and data size.
6180 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
6181 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
6183 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
6184 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
6187 2) iASL Compiler/Disassembler and Tools:
6189 Disassembler: Added support to emit short, commented descriptions for the
6191 predefined names in order to improve the readability of the disassembled
6192 output. ACPICA BZ 959. Changes include:
6193 1) Emit descriptions for all standard predefined names (_INI, _STA,
6196 2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
6197 3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
6200 AcpiSrc: Fixed several long-standing Linux code translation issues.
6202 descriptions in function headers are now translated properly to lower
6205 underscores. ACPICA BZ 961. Also fixes translation problems such as
6211 local_fADT -> local_FADT
6212 execute_oSI -> execute_OSI
6214 iASL: Fixed a problem where null bytes were inadvertently emitted into
6218 iASL: Added the existing debug options to the standard help screen. There
6220 no longer two different help screens. ACPICA BZ 957.
6222 AcpiHelp: Fixed some typos in the various predefined name descriptions.
6224 expand some of the descriptions where appropriate.
6226 iASL: Fixed the -ot option (display compile times/statistics). Was not
6228 properly for standard output; only worked for the debug file case.
6230 ----------------------------------------
6231 18 May 2012. Summary of changes for version 20120518:
6234 1) ACPICA Core Subsystem:
6236 Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
6238 to block until asynchronous events such as notifies and GPEs have
6240 Within ACPICA, it is only called before a notify or GPE handler is
6241 removed/uninstalled. It also may be useful for the host OS within related
6242 drivers such as the Embedded Controller driver. See the ACPICA reference
6244 additional information. ACPICA BZ 868.
6246 ACPI Tables: Added a new error message for a possible overflow failure
6248 the conversion of FADT 32-bit legacy register addresses to internal
6251 bit GAS structure representation. The GAS has a one-byte "bit length"
6253 thus limiting the register length to 255 bits. ACPICA BZ 953.
6255 Example Code and Data Size: These are the sizes for the OS-independent
6256 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6258 version of the code includes the debug output trace mechanism and has a
6260 larger code and data size.
6263 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
6264 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
6266 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
6267 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
6270 2) iASL Compiler/Disassembler and Tools:
6272 iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
6274 This keyword was added late in the ACPI 5.0 release cycle and was not
6275 implemented until now.
6277 Disassembler: Added support for Operation Region externals. Adds missing
6278 support for operation regions that are defined in another table, and
6279 referenced locally via a Field or BankField ASL operator. Now generates
6281 correct External statement.
6283 Disassembler: Several additional fixes for the External() statement
6285 related to some ASL operators. Also, order the External() statements
6286 alphabetically in the disassembler output. Fixes the External()
6289 the Create* field, Alias, and Scope operators:
6290 1) Create* buffer field operators - fix type mismatch warning on
6292 2) Alias - implement missing External support
6293 3) Scope - fix to make sure all necessary externals are emitted.
6295 iASL: Improved pathname support. For include files, merge the prefix
6297 with the file pathname and eliminate unnecessary components. Convert
6298 backslashes in all pathnames to forward slashes, for readability. Include
6300 pathname changes affect both #include and Include() type operators.
6302 iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
6304 of a valid line by inserting a newline and then returning the EOF during
6306 next call to GetNextLine. Prevents the line from being ignored due to EOF
6309 iASL: Implemented some changes to enhance the IDE support (-vi option.)
6311 and Warning messages are now correctly recognized for both the source
6313 browser and the global error and warning counts.
6315 ----------------------------------------
6316 20 April 2012. Summary of changes for version 20120420:
6319 1) ACPICA Core Subsystem:
6321 Implemented support for multiple notify handlers. This change adds
6324 allow multiple system and device notify handlers on Device, Thermal Zone,
6326 Processor objects. This can simplify the host OS notification
6328 Also re-worked and restructured the entire notify support code to
6330 handler installation, handler removal, notify event queuing, and notify
6331 dispatch to handler(s). Note: there can still only be two global notify
6332 handlers - one for system notifies and one for device notifies. There are
6334 changes to the existing handler install/remove interfaces. Lin Ming, Bob
6335 Moore, Rafael Wysocki.
6337 Fixed a regression in the package repair code where the object reference
6338 count was calculated incorrectly. Regression was introduced in the commit
6339 "Support to add Package wrappers".
6341 Fixed a couple possible memory leaks in the AML parser, in the error
6343 path. Jesper Juhl, Lin Ming.
6345 Example Code and Data Size: These are the sizes for the OS-independent
6346 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6347 debug version of the code includes the debug output trace mechanism and
6349 much larger code and data size.
6352 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
6353 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
6355 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
6356 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
6359 2) iASL Compiler/Disassembler and Tools:
6361 iASL: Fixed a problem with the resource descriptor support where the
6363 of the StartDependentFn and StartDependentFnNoPrio descriptors were not
6364 included in cumulative descriptor offset, resulting in incorrect values
6366 resource tags within resource descriptors appearing after a
6368 descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
6370 iASL and Preprocessor: Implemented full support for the #line directive
6372 correctly track original source file line numbers through the .i
6374 output file - for error and warning messages.
6376 iASL: Expand the allowable byte constants for address space IDs.
6378 the allowable range was 0x80-0xFF (user-defined spaces), now the range is
6379 0x0A-0xFF to allow for custom and new IDs without changing the compiler.
6381 iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
6383 iASL: Add option to completely disable the preprocessor (-Pn).
6385 iASL: Now emit all error/warning messages to standard error (stderr) by
6386 default (instead of the previous stdout).
6388 ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
6390 for resource descriptor offset fix above. Update/cleanup error output
6391 routines. Enable and send iASL errors/warnings to an error logfile
6392 (error.txt). Send all other iASL output to a logfile (compiler.txt).
6394 several extraneous "unrecognized operator" messages.
6396 ----------------------------------------
6397 20 March 2012. Summary of changes for version 20120320:
6400 1) ACPICA Core Subsystem:
6402 Enhanced the sleep/wake interfaces to optionally execute the _GTS method
6403 (Going To Sleep) and the _BFS method (Back From Sleep). Windows
6405 does not execute these methods, and therefore these methods are often
6406 untested. It has been seen on some systems where the execution of these
6407 methods causes errors and also prevents the machine from entering S5. It
6409 therefore suggested that host operating systems do not execute these
6411 by default. In the future, perhaps these methods can be optionally
6413 based on the age of the system and/or what is the newest version of
6415 that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
6417 AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
6420 Fixed a problem where the length of the local/common FADT was set too
6422 The local FADT table length cannot be set to the common length until the
6423 original length has been examined. There is code that checks the table
6425 and sets various fields appropriately. This can affect older machines
6427 early FADT versions. For example, this can cause inadvertent writes to
6429 CST_CNT register. Julian Anastasov.
6431 Fixed a mapping issue related to a physical table override. Use the
6433 mapping mechanism for tables loaded via the physical override OSL
6435 This allows for early mapping before the virtual memory manager is
6437 Thomas Renninger, Bob Moore.
6439 Enhanced the automatic return-object repair code: Repair a common problem
6441 predefined methods that are defined to return a variable-length Package
6443 sub-objects. If there is only one sub-object, some BIOS ASL code
6445 simply returns the single object instead of a Package with one sub-
6447 This new support will repair this error by wrapping a Package object
6449 the original object, creating the correct and expected Package with one
6451 object. Names that can be repaired in this manner include: _ALR, _CSD,
6453 _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
6456 Changed the exception code returned for invalid ACPI paths passed as
6457 parameters to external interfaces such as AcpiEvaluateObject. Was
6458 AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
6460 Example Code and Data Size: These are the sizes for the OS-independent
6461 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6463 version of the code includes the debug output trace mechanism and has a
6465 larger code and data size.
6468 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
6469 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
6471 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
6472 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
6475 2) iASL Compiler/Disassembler and Tools:
6477 iASL: Added the infrastructure and initial implementation of a integrated
6479 like preprocessor. This will simplify BIOS development process by
6481 the need for a separate preprocessing step during builds. On Windows, it
6483 eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
6484 features including full #define() macro support are still under
6486 These preprocessor directives are supported:
6499 In addition, these new command line options are supported:
6500 -D <symbol> Define symbol for preprocessor use
6501 -li Create preprocessed output file (*.i)
6502 -P Preprocess only and create preprocessor output file (*.i)
6504 Table Compiler: Fixed a problem where the equals operator within an
6506 did not work properly.
6508 Updated iASL to use the current versions of Bison/Flex. Updated the
6510 project file to invoke these tools from the standard location. ACPICA BZ
6513 Flex for Windows: V2.5.4
6514 Bison for Windows: V2.4.1
6516 ----------------------------------------
6517 15 February 2012. Summary of changes for version 20120215:
6520 1) ACPICA Core Subsystem:
6522 There have been some major changes to the sleep/wake support code, as
6523 described below (a - e).
6525 a) The AcpiLeaveSleepState has been split into two interfaces, similar to
6526 AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
6527 AcpiLeaveSleepStatePrep. This allows the host to perform actions between
6529 time the _BFS method is called and the _WAK method is called. NOTE: all
6531 must update their wake/resume code or else sleep/wake will not work
6535 b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
6537 method. Some machines require that the GPEs are enabled before the _WAK
6539 is executed. Thomas Renninger.
6541 c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
6543 Some BIOS code assumes that WAK_STS will be cleared on resume and use it
6545 determine whether the system is rebooting or resuming. Matthew Garrett.
6547 d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
6549 match the ACPI specification requirement. Rafael Wysocki.
6551 e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
6552 registers within the V5 FADT. This support adds two new files:
6553 hardware/hwesleep.c implements the support for the new registers. Moved
6555 sleep/wake external interfaces to hardware/hwxfsleep.c.
6558 Added a new OSL interface for ACPI table overrides,
6559 AcpiOsPhysicalTableOverride. This interface allows the host to override a
6560 table via a physical address, instead of the logical address required by
6561 AcpiOsTableOverride. This simplifies the host implementation. Initial
6562 implementation by Thomas Renninger. The ACPICA implementation creates a
6564 shared function for table overrides that attempts both a logical and a
6567 Expanded the OSL memory read/write interfaces to 64-bit data
6568 (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
6569 transfer support for GAS register structures passed to AcpiRead and
6572 Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
6574 build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
6576 See the ACPICA reference for details. ACPICA BZ 942. This option removes
6578 10% of the code and 5% of the static data, and the following hardware
6580 features become unavailable:
6581 PM Event and Control registers
6582 SCI interrupt (and handler)
6584 General Purpose Events (GPEs)
6587 FACS table (Waking vectors and Global Lock)
6589 Updated the unix tarball directory structure to match the ACPICA git
6591 tree. This ensures that the generic unix makefiles work properly (in
6592 generate/unix). Also updated the Linux makefiles to match. ACPICA BZ
6595 Updated the return value of the _REV predefined method to integer value 5
6597 reflect ACPI 5.0 support.
6599 Moved the external ACPI PM timer interface prototypes to the public
6601 file where they belong.
6603 Example Code and Data Size: These are the sizes for the OS-independent
6604 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6606 version of the code includes the debug output trace mechanism and has a
6608 larger code and data size.
6611 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
6612 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
6614 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
6615 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
6618 2) iASL Compiler/Disassembler and Tools:
6620 Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
6621 descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
6622 incorrectly displayed.
6624 AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
6627 ----------------------------------------
6628 11 January 2012. Summary of changes for version 20120111:
6631 1) ACPICA Core Subsystem:
6633 Implemented a new mechanism to allow host device drivers to check for
6635 range conflicts with ACPI Operation Regions. Both SystemMemory and
6637 address spaces are supported. A new external interface,
6638 AcpiCheckAddressRange,
6639 allows drivers to check an address range against the ACPI namespace. See
6641 ACPICA reference for additional details. Adds one new file,
6642 utilities/utaddress.c. Lin Ming, Bob Moore.
6644 Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
6647 Status registers, update the ACPI 5.0 flags, and update internal data
6648 structures to handle an FADT larger than 256 bytes. The size of the ACPI
6652 Updated all ACPICA copyrights and signons to 2012. Added the 2012
6654 all module headers and signons, including the standard Linux header. This
6655 affects virtually every file in the ACPICA core subsystem, iASL compiler,
6657 all ACPICA utilities.
6659 Example Code and Data Size: These are the sizes for the OS-independent
6660 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6662 version of the code includes the debug output trace mechanism and has a
6664 larger code and data size.
6667 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
6668 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
6670 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
6671 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
6674 2) iASL Compiler/Disassembler and Tools:
6676 Disassembler: fixed a problem with the automatic resource tag generation
6677 support. Fixes a problem where the resource tags are inadvertently not
6678 constructed if the table being disassembled contains external references
6680 control methods. Moved the actual construction of the tags to after the
6682 namespace is constructed (after 2nd parse is invoked due to external
6684 method references.) ACPICA BZ 941.
6686 Table Compiler: Make all "generic" operators caseless. These are the
6688 like UINT8, String, etc. Making these caseless improves ease-of-use.
6692 ----------------------------------------
6693 23 November 2011. Summary of changes for version 20111123:
6695 0) ACPI 5.0 Support:
6697 This release contains full support for the ACPI 5.0 specification, as
6700 Reduced Hardware Support:
6701 -------------------------
6703 This support allows for ACPI systems without the usual ACPI hardware.
6705 support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
6707 not attempt to initialize or use any of the usual ACPI hardware. Note,
6709 this flag is set, all of the following ACPI hardware is assumed to be not
6710 present and is not initialized or accessed:
6712 General Purpose Events (GPEs)
6713 Fixed Events (PM1a/PM1b and PM Control)
6714 Power Management Timer and Console Buttons (power/sleep)
6715 Real-time Clock Alarm
6717 System Control Interrupt (SCI)
6718 The FACS is assumed to be non-existent
6723 All new tables and updates to existing tables are fully supported in the
6724 ACPICA headers (for use by device drivers), the disassembler, and the
6726 Data Table Compiler. ACPI 5.0 defines these new tables:
6728 BGRT /* Boot Graphics Resource Table */
6729 DRTM /* Dynamic Root of Trust for Measurement table */
6730 FPDT /* Firmware Performance Data Table */
6731 GTDT /* Generic Timer Description Table */
6732 MPST /* Memory Power State Table */
6733 PCCT /* Platform Communications Channel Table */
6734 PMTT /* Platform Memory Topology Table */
6735 RASF /* RAS Feature table */
6737 Operation Regions/SpaceIDs:
6738 ---------------------------
6740 All new operation regions are fully supported by the iASL compiler, the
6741 disassembler, and the ACPICA runtime code (for dispatch to region
6743 The new operation region Space IDs are:
6748 Resource Descriptors:
6749 ---------------------
6751 All new ASL resource descriptors are fully supported by the iASL
6754 ASL/AML disassembler, and the ACPICA runtime Resource Manager code
6756 all new predefined resource tags). New descriptors are:
6765 ASL/AML Operators, New and Modified:
6766 ------------------------------------
6768 One new operator is added, the Connection operator, which is used to
6770 a GeneralPurposeIo or GenericSerialBus resource descriptor with
6772 field objects within an operation region. Several new protocols are
6774 with the AccessAs operator. All are fully supported by the iASL compiler,
6775 disassembler, and runtime ACPICA AML interpreter:
6777 Connection // Declare Field Connection
6779 AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol
6780 AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes
6782 AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
6783 RawDataBuffer // Data type for Vendor Data
6786 Predefined ASL/AML Objects:
6787 ---------------------------
6789 All new predefined objects/control-methods are supported by the iASL
6791 and the ACPICA runtime validation/repair (arguments and return values.)
6793 predefined names include the following:
6795 Standard Predefined Names (Objects or Control Methods):
6796 _AEI, _CLS, _CPC, _CWS, _DEP,
6797 _DLM, _EVT, _GCP, _CRT, _GWS,
6798 _HRV, _PRE, _PSE, _SRT, _SUB.
6800 Resource Tags (Names used to access individual fields within resource
6802 _DBT, _DPL, _DRS, _END, _FLC,
6803 _IOR, _LIN, _MOD, _PAR, _PHA,
6804 _PIN, _PPI, _POL, _RXL, _SLV,
6805 _SPE, _STB, _TXL, _VEN.
6807 ACPICA External Interfaces:
6808 ---------------------------
6810 Several new interfaces have been defined for use by ACPI-related device
6811 drivers and other host OS services:
6813 AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
6815 acquire and release AML mutexes that are defined in the DSDT/SSDT tables
6816 provided by the BIOS. They are intended to be used in conjunction with
6818 ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
6819 mutual exclusion with the AML code/interpreter.
6821 AcpiGetEventResources: Returns the (formatted) resource descriptors as
6823 by the ACPI 5.0 _AEI object (ACPI Event Information). This object
6825 resource descriptors associated with hardware-reduced platform events,
6827 to the AcpiGetCurrentResources interface.
6829 Operation Region Handlers: For General Purpose IO and Generic Serial Bus
6830 operation regions, information about the Connection() object and any
6832 length information is passed to the region handler within the Context
6835 AcpiBufferToResource: This interface converts a raw AML buffer containing
6837 resource template or resource descriptor to the ACPI_RESOURCE internal
6839 suitable for use by device drivers. Can be used by an operation region
6841 to convert the Connection() buffer object into a ACPI_RESOURCE.
6843 Miscellaneous/Tools/TestSuites:
6844 -------------------------------
6846 Support for extended _HID names (Four alpha characters instead of three).
6847 Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
6848 Support for ACPI 5.0 features in the ASLTS test suite.
6849 Fully updated documentation (ACPICA and iASL reference documents.)
6851 ACPI Table Definition Language:
6852 -------------------------------
6854 Support for this language was implemented and released as a subsystem of
6856 iASL compiler in 2010. (See the iASL compiler User Guide.)
6859 Non-ACPI 5.0 changes for this release:
6860 --------------------------------------
6862 1) ACPICA Core Subsystem:
6864 Fix a problem with operation region declarations where a failure can
6867 the region name and an argument that evaluates to an object (such as the
6868 region address) are in different namespace scopes. Lin Ming, ACPICA BZ
6871 Do not abort an ACPI table load if an invalid space ID is found within.
6873 will be caught later if the offending method is executed. ACPICA BZ 925.
6875 Fixed an issue with the FFixedHW space ID where the ID was not always
6876 recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
6878 Fixed a problem with the 32-bit generation of the unix-specific OSL
6879 (osunixxf.c). Lin Ming, ACPICA BZ 936.
6881 Several changes made to enable generation with the GCC 4.6 compiler.
6885 New error messages: Unsupported I/O requests (not 8/16/32 bit), and
6887 field registers out-of-range.
6889 2) iASL Compiler/Disassembler and Tools:
6891 iASL: Implemented the __PATH__ operator, which returns the full pathname
6893 the current source file.
6895 AcpiHelp: Automatically display expanded keyword information for all ASL
6898 Debugger: Add "Template" command to disassemble/dump resource template
6901 Added a new master script to generate and execute the ASLTS test suite.
6902 Automatically handles 32- and 64-bit generation. See tests/aslts.sh
6904 iASL: Fix problem with listing generation during processing of the
6906 operator where AML listing was disabled until the entire Switch block was
6909 iASL: Improve support for semicolon statement terminators. Fix "invalid
6910 character" message for some cases when the semicolon is used. Semicolons
6912 now allowed after every <Term> grammar element. ACPICA BZ 927.
6914 iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
6917 Disassembler: Fix problem with disassembly of the DataTableRegion
6919 where an inadvertent "Unhandled deferred opcode" message could be
6922 3) Example Code and Data Size
6924 These are the sizes for the OS-independent acpica.lib produced by the
6925 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
6926 includes the debug output trace mechanism and has a much larger code and
6931 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6932 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6934 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
6935 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
6937 ----------------------------------------
6938 22 September 2011. Summary of changes for version 20110922:
6942 Support for ACPI 5.0 in ACPICA has been underway for several months and
6944 be released at the same time that ACPI 5.0 is officially released.
6946 The ACPI 5.0 specification is on track for release in the next few
6949 1) ACPICA Core Subsystem:
6951 Fixed a problem where the maximum sleep time for the Sleep() operator was
6952 intended to be limited to two seconds, but was inadvertently limited to
6956 Linux and Unix makefiles: Added header file dependencies to ensure
6958 generation of ACPICA core code and utilities. Also simplified the
6960 considerably through the use of the vpath variable to specify search
6964 2) iASL Compiler/Disassembler and Tools:
6966 iASL: Implemented support to check the access length for all fields
6968 access named Resource Descriptor fields. For example, if a resource field
6970 defined to be two bits, a warning is issued if a CreateXxxxField() is
6972 with an incorrect bit length. This is implemented for all current
6974 descriptor names. ACPICA BZ 930.
6976 Disassembler: Fixed a byte ordering problem with the output of 24-bit and
6980 iASL: Fixed a couple of issues associated with variable-length package
6981 objects. 1) properly handle constants like One, Ones, Zero -- do not make
6983 VAR_PACKAGE when these are used as a package length. 2) Allow the
6985 opcode (in addition to PACKAGE) when validating object types for
6989 iASL: Emit statistics for all output files (instead of just the ASL input
6991 AML output). Includes listings, hex files, etc.
6993 iASL: Added -G option to the table compiler to allow the compilation of
6995 ACPI tables. The only part of a table that is required is the standard
7000 AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
7002 which also adds correct 64-bit support. Also, now all output filenames
7004 completely lower case.
7006 AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
7007 loading table files. A warning is issued for any such tables. The only
7008 exception is an FADT. This also fixes a possible fault when attempting to
7010 non-AML tables. ACPICA BZ 932.
7012 AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
7014 missing table terminator could cause a fault when using the -p option.
7016 AcpiSrc: Fixed a possible divide-by-zero fault when generating file
7019 3) Example Code and Data Size
7021 These are the sizes for the OS-independent acpica.lib produced by the
7022 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
7023 includes the debug output trace mechanism and has a much larger code and
7027 Previous Release (VC 9.0):
7028 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
7029 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
7030 Current Release (VC 9.0):
7031 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
7032 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
7035 ----------------------------------------
7036 23 June 2011. Summary of changes for version 20110623:
7038 1) ACPI CA Core Subsystem:
7040 Updated the predefined name repair mechanism to not attempt repair of a
7042 return object if a _PSS object is present. We can only sort the _TSS
7044 package if there is no _PSS within the same scope. This is because if
7047 present, the ACPI specification dictates that the _TSS Power Dissipation
7049 is to be ignored, and therefore some BIOSs leave garbage values in the
7051 Power field(s). In this case, it is best to just return the _TSS package
7053 is. Reported by, and fixed with assistance from Fenghua Yu.
7055 Added an option to globally disable the control method return value
7057 and repair. This runtime option can be used to disable return value
7060 this is causing a problem on a particular machine. Also added an option
7062 AcpiExec (-dr) to set this disable flag.
7064 All makefiles and project files: Major changes to improve generation of
7066 tools. ACPICA BZ 912:
7067 Reduce default optimization levels to improve compatibility
7068 For Linux, add strict-aliasing=0 for gcc 4
7069 Cleanup and simplify use of command line defines
7070 Cleanup multithread library support
7071 Improve usage messages
7073 Linux-specific header: update handling of THREAD_ID and pthread. For the
7075 bit case, improve casting to eliminate possible warnings, especially with
7079 Example Code and Data Size: These are the sizes for the OS-independent
7080 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
7082 version of the code includes the debug output trace mechanism and has a
7084 larger code and data size.
7086 Previous Release (VC 9.0):
7087 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
7088 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
7089 Current Release (VC 9.0):
7090 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
7091 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
7093 2) iASL Compiler/Disassembler and Tools:
7095 With this release, a new utility named "acpihelp" has been added to the
7097 package. This utility summarizes the ACPI specification chapters for the
7099 and AML languages. It generates under Linux/Unix as well as Windows, and
7100 provides the following functionality:
7101 Find/display ASL operator(s) -- with description and syntax.
7102 Find/display ASL keyword(s) -- with exact spelling and descriptions.
7103 Find/display ACPI predefined name(s) -- with description, number
7104 of arguments, and the return value data type.
7105 Find/display AML opcode name(s) -- with opcode, arguments, and
7107 Decode/display AML opcode -- with opcode name, arguments, and
7110 Service Layers: Make multi-thread support configurable. Conditionally
7112 the multi-thread support so that threading libraries will not be linked
7115 necessary. The only tool that requires multi-thread support is AcpiExec.
7117 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
7119 Bison appear to want the interface to yyerror to be a const char * (or at
7120 least this is a problem when generating iASL on some systems.) ACPICA BZ
7124 Tools: Fix for systems where O_BINARY is not defined. Only used for
7126 versions of the tools.
7128 ----------------------------------------
7129 27 May 2011. Summary of changes for version 20110527:
7131 1) ACPI CA Core Subsystem:
7133 ASL Load() operator: Reinstate most restrictions on the incoming ACPI
7135 signature. Now, only allow SSDT, OEMx, and a null signature. History:
7136 1) Originally, we checked the table signature for "SSDT" or "PSDT".
7137 (PSDT is now obsolete.)
7138 2) We added support for OEMx tables, signature "OEM" plus a fourth
7139 "don't care" character.
7140 3) Valid tables were encountered with a null signature, so we just
7141 gave up on validating the signature, (05/2008).
7142 4) We encountered non-AML tables such as the MADT, which caused
7143 interpreter errors and kernel faults. So now, we once again allow
7144 only SSDT, OEMx, and now, also a null signature. (05/2011).
7146 Added the missing _TDL predefined name to the global name list in order
7148 enable validation. Affects both the core ACPICA code and the iASL
7151 Example Code and Data Size: These are the sizes for the OS-independent
7152 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
7154 version of the code includes the debug output trace mechanism and has a
7156 larger code and data size.
7158 Previous Release (VC 9.0):
7159 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
7160 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
7161 Current Release (VC 9.0):
7162 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
7163 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
7165 2) iASL Compiler/Disassembler and Tools:
7167 Debugger/AcpiExec: Implemented support for "complex" method arguments on
7169 debugger command line. This adds support beyond simple integers --
7171 Strings, Buffers, and Packages. Includes support for nested packages.
7172 Increased the default command line buffer size to accommodate these
7174 See the ACPICA reference for details and syntax. ACPICA BZ 917.
7176 Debugger/AcpiExec: Implemented support for "default" method arguments for
7178 Execute/Debug command. Now, the debugger will always invoke a control
7180 with the required number of arguments -- even if the command line
7182 none or insufficient arguments. It uses default integer values for any
7184 arguments. Also fixes a bug where only six method arguments maximum were
7185 supported instead of the required seven.
7187 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
7189 also return status in order to prevent buffer overruns. See the ACPICA
7190 reference for details and syntax. ACPICA BZ 921
7192 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
7193 makefiles to simplify support for the two different but similar parser
7194 generators, bison and yacc.
7196 Updated the generic unix makefile for gcc 4. The default gcc version is
7198 expected to be 4 or greater, since options specific to gcc 4 are used.
7200 ----------------------------------------
7201 13 April 2011. Summary of changes for version 20110413:
7203 1) ACPI CA Core Subsystem:
7205 Implemented support to execute a so-called "orphan" _REG method under the
7207 device. This change will force the execution of a _REG method underneath
7210 device even if there is no corresponding operation region of type
7211 EmbeddedControl. Fixes a problem seen on some machines and apparently is
7212 compatible with Windows behavior. ACPICA BZ 875.
7214 Added more predefined methods that are eligible for automatic NULL
7216 element removal. This change adds another group of predefined names to
7219 of names that can be repaired by having NULL package elements dynamically
7220 removed. This group are those methods that return a single variable-
7222 package containing simple data types such as integers, buffers, strings.
7224 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
7227 and _TZD. ACPICA BZ 914.
7229 Split and segregated all internal global lock functions to a new file,
7232 Updated internal address SpaceID for DataTable regions. Moved this
7235 id in preparation for ACPI 5.0 changes that will include some new space
7238 change should not affect user/host code.
7240 Example Code and Data Size: These are the sizes for the OS-independent
7242 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
7244 the code includes the debug output trace mechanism and has a much larger
7249 Previous Release (VC 9.0):
7250 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
7251 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
7252 Current Release (VC 9.0):
7253 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
7254 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
7256 2) iASL Compiler/Disassembler and Tools:
7258 iASL/DTC: Major update for new grammar features. Allow generic data types
7260 custom ACPI tables. Field names are now optional. Any line can be split
7262 multiple lines using the continuation char (\). Large buffers now use
7264 continuation character(s) and no colon on the continuation lines. See the
7266 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
7269 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
7271 Since the parser stuffs a "zero" as the return value for these statements
7274 the underlying AML grammar), they were seen as "return with value" by the
7276 semantic checking. They are now seen correctly as "null" return
7279 iASL: Check if a_REG declaration has a corresponding Operation Region.
7281 check for each _REG to ensure that there is in fact a corresponding
7283 region declaration in the same scope. If not, the _REG method is not very
7285 since it probably won't be executed. ACPICA BZ 915.
7287 iASL/DTC: Finish support for expression evaluation. Added a new
7290 that implements c-style operator precedence and parenthesization. ACPICA
7294 Disassembler/DTC: Remove support for () and <> style comments in data
7297 that DTC has full expression support, we don't want to have comment
7300 start with a parentheses or a less-than symbol. Now, only the standard /*
7303 comments are supported, as well as the bracket [] comments.
7305 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
7307 headers in the acpidump file. Update the header validation to support
7309 tables. Problem introduced in previous AcpiXtract version in the change
7311 support "wrong checksum" error messages emitted by acpidump utility.
7313 iASL: Add a * option to generate all template files (as a synonym for
7317 "iasl -T *" or "iasl -T ALL".
7319 iASL/DTC: Do not abort compiler on fatal errors. We do not want to
7321 abort the compiler on "fatal" errors, simply should abort the current
7323 This allows multiple compiles with a single (possibly wildcard) compiler
7326 ----------------------------------------
7327 16 March 2011. Summary of changes for version 20110316:
7329 1) ACPI CA Core Subsystem:
7331 Fixed a problem caused by a _PRW method appearing at the namespace root
7333 during the setup of wake GPEs. A fault could occur if a _PRW directly
7336 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
7338 Implemented support for "spurious" Global Lock interrupts. On some
7340 global lock interrupt can occur without the pending flag being set. Upon
7343 interrupt, we now ensure that a thread is actually waiting for the lock
7345 signaling GL availability. Rafael Wysocki, Bob Moore.
7347 Example Code and Data Size: These are the sizes for the OS-independent
7349 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
7351 the code includes the debug output trace mechanism and has a much larger
7356 Previous Release (VC 9.0):
7357 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
7358 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
7359 Current Release (VC 9.0):
7360 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
7361 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
7363 2) iASL Compiler/Disassembler and Tools:
7365 Implemented full support for the "SLIC" ACPI table. Includes support in
7367 header files, disassembler, table compiler, and template generator. Bob
7371 AcpiXtract: Correctly handle embedded comments and messages from
7373 Apparently some or all versions of acpidump will occasionally emit a
7376 "Wrong checksum", etc., into the dump file. This was causing problems for
7377 AcpiXtract. ACPICA BZ 905.
7379 iASL: Fix the Linux makefile by removing an inadvertent double file
7383 AcpiExec: Update installation of operation region handlers. Install one
7385 for a user-defined address space. This is used by the ASL test suite
7388 ----------------------------------------
7389 11 February 2011. Summary of changes for version 20110211:
7391 1) ACPI CA Core Subsystem:
7393 Added a mechanism to defer _REG methods for some early-installed
7395 Most user handlers should be installed before call to
7396 AcpiEnableSubsystem.
7397 However, Event handlers and region handlers should be installed after
7398 AcpiInitializeObjects. Override handlers for the "default" regions should
7400 installed early, however. This change executes all _REG methods for the
7401 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
7402 chicken/egg issues between them. ACPICA BZ 848.
7404 Implemented an optimization for GPE detection. This optimization will
7406 ignore GPE registers that contain no enabled GPEs -- there is no need to
7407 read the register since this information is available internally. This
7408 becomes more important on machines with a large GPE space. ACPICA
7410 884. Lin Ming. Suggestion from Joe Liu.
7412 Removed all use of the highly unreliable FADT revision field. The
7414 number in the FADT has been found to be completely unreliable and cannot
7416 trusted. Only the actual table length can be used to infer the version.
7418 change updates the ACPICA core and the disassembler so that both no
7420 even look at the FADT version and instead depend solely upon the FADT
7423 Fix an unresolved name issue for the no-debug and no-error-message source
7424 generation cases. The _AcpiModuleName was left undefined in these cases,
7426 it is actually needed as a parameter to some interfaces. Define
7427 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
7429 Split several large files (makefiles and project files updated)
7430 utglobal.c -> utdecode.c
7431 dbcomds.c -> dbmethod.c dbnames.c
7432 dsopcode.c -> dsargs.c dscontrol.c
7433 dsload.c -> dsload2.c
7434 aslanalyze.c -> aslbtypes.c aslwalks.c
7436 Example Code and Data Size: These are the sizes for the OS-independent
7437 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
7438 debug version of the code includes the debug output trace mechanism and
7440 a much larger code and data size.
7442 Previous Release (VC 9.0):
7443 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
7444 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
7445 Current Release (VC 9.0):
7446 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
7447 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
7449 2) iASL Compiler/Disassembler and Tools:
7451 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
7452 These are useful C-style macros with the standard definitions. ACPICA
7455 iASL/DTC: Added support for integer expressions and labels. Support for
7457 expressions for all integer fields in all ACPI tables. Support for labels
7459 "generic" portions of tables such as UEFI. See the iASL reference manual.
7461 Debugger: Added a command to display the status of global handlers. The
7462 "handlers" command will display op region, fixed event, and miscellaneous
7463 global handlers. installation status -- and for op regions, whether
7465 or user-installed handler will be used.
7467 iASL: Warn if reserved method incorrectly returns a value. Many
7469 names are defined such that they do not return a value. If implemented as
7471 method, issue a warning if such a name explicitly returns a value. ACPICA
7474 iASL: Added detection of GPE method name conflicts. Detects a conflict
7476 there are two GPE methods of the form _Lxy and _Exy in the same scope.
7478 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
7480 iASL/DTC: Fixed a couple input scanner issues with comments and line
7481 numbers. Comment remover could get confused and miss a comment ending.
7483 a problem with line counter maintenance.
7485 iASL/DTC: Reduced the severity of some errors from fatal to error. There
7487 no need to abort on simple errors within a field definition.
7489 Debugger: Simplified the output of the help command. All help output now
7491 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
7493 ----------------------------------------
7494 12 January 2011. Summary of changes for version 20110112:
7496 1) ACPI CA Core Subsystem:
7498 Fixed a race condition between method execution and namespace walks that
7500 possibly cause a fault. The problem was apparently introduced in version
7501 20100528 as a result of a performance optimization that reduces the
7504 namespace walks upon method exit by using the delete_namespace_subtree
7505 function instead of the delete_namespace_by_owner function used
7507 Bug is a missing namespace lock in the delete_namespace_subtree function.
7508 dana.myers@oracle.com
7510 Fixed several issues and a possible fault with the automatic "serialized"
7511 method support. History: This support changes a method to "serialized" on
7513 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
7514 possibility that it cannot handle reentrancy. This fix repairs a couple
7516 issues seen in the field, especially on machines with many cores:
7518 1) Delete method children only upon the exit of the last thread,
7519 so as to not delete objects out from under other running threads
7520 (and possibly causing a fault.)
7521 2) Set the "serialized" bit for the method only upon the exit of the
7522 Last thread, so as to not cause deadlock when running threads
7524 3) Cleanup the use of the AML "MethodFlags" and internal method flags
7525 so that there is no longer any confusion between the two.
7527 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
7529 Debugger: Now lock the namespace for duration of a namespace dump.
7531 issues if the namespace is changing dynamically underneath the debugger.
7532 Especially affects temporary namespace nodes, since the debugger displays
7535 Updated the ordering of include files. The ACPICA headers should appear
7536 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
7538 any necessary compiler-specific defines, etc. Affects the ACPI-related
7542 Updated all ACPICA copyrights and signons to 2011. Added the 2011
7544 to all module headers and signons, including the Linux header. This
7546 virtually every file in the ACPICA core subsystem, iASL compiler, and all
7549 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
7550 project files for VC++ 6.0 are now obsolete. New project files can be
7552 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
7555 Example Code and Data Size: These are the sizes for the OS-independent
7556 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
7557 debug version of the code includes the debug output trace mechanism and
7559 much larger code and data size.
7561 Previous Release (VC 6.0):
7562 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
7563 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
7564 Current Release (VC 9.0):
7565 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
7566 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
7568 2) iASL Compiler/Disassembler and Tools:
7570 iASL: Added generic data types to the Data Table compiler. Add "generic"
7572 types such as UINT32, String, Unicode, etc., to simplify the generation
7574 platform-defined tables such as UEFI. Lin Ming.
7576 iASL: Added listing support for the Data Table Compiler. Adds listing
7578 (-l) to display actual binary output for each line of input code.
7580 ----------------------------------------
7581 09 December 2010. Summary of changes for version 20101209:
7583 1) ACPI CA Core Subsystem:
7585 Completed the major overhaul of the GPE support code that was begun in
7587 2010. Major features include: removal of _PRW execution in ACPICA (host
7588 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
7589 changes to existing interfaces, simplification of GPE handler operation,
7591 a handful of new interfaces:
7597 One new file, evxfgpe.c to consolidate all external GPE interfaces.
7599 See the ACPICA Programmer Reference for full details and programming
7600 information. See the new section 4.4 "General Purpose Event (GPE)
7602 for a full overview, and section 8.7 "ACPI General Purpose Event
7604 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
7606 Bob Moore, Rafael Wysocki.
7608 Implemented a new GPE feature for Windows compatibility, the "Implicit
7610 GPE Notify". This feature will automatically issue a Notify(2) on a
7612 when a Wake GPE is received if there is no corresponding GPE method or
7613 handler. ACPICA BZ 870.
7615 Fixed a problem with the Scope() operator during table parse and load
7617 During load phase (table load or method execution), the scope operator
7619 not enter the target into the namespace. Instead, it should open a new
7621 at the target location. Linux BZ 19462, ACPICA BZ 882.
7623 Example Code and Data Size: These are the sizes for the OS-independent
7624 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7625 debug version of the code includes the debug output trace mechanism and
7627 much larger code and data size.
7630 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
7631 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
7633 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
7634 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
7636 2) iASL Compiler/Disassembler and Tools:
7638 iASL: Relax the alphanumeric restriction on _CID strings. These strings
7640 "bus-specific" per the ACPI specification, and therefore any characters
7642 acceptable. The only checks that can be performed are for a null string
7644 perhaps for a leading asterisk. ACPICA BZ 886.
7646 iASL: Fixed a problem where a syntax error that caused a premature EOF
7647 condition on the source file emitted a very confusing error message. The
7648 premature EOF is now detected correctly. ACPICA BZ 891.
7650 Disassembler: Decode the AccessSize within a Generic Address Structure
7652 access, word access, etc.) Note, this field does not allow arbitrary bit
7653 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
7655 New: AcpiNames utility - Example namespace dump utility. Shows an example
7657 ACPICA configuration for a minimal namespace dump utility. Uses table and
7658 namespace managers, but no AML interpreter. Does not add any
7660 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
7661 partition and configure ACPICA. ACPICA BZ 883.
7663 AML Debugger: Increased the debugger buffer size for method return
7665 Was 4K, increased to 16K. Also enhanced error messages for debugger
7667 execution, including the buffer overflow case.
7669 ----------------------------------------
7670 13 October 2010. Summary of changes for version 20101013:
7672 1) ACPI CA Core Subsystem:
7674 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
7676 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
7677 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
7679 Changed the type of the predefined namespace object _TZ from ThermalZone
7681 Device. This was found to be confusing to the host software that
7683 the various thermal zones, since _TZ is not really a ThermalZone.
7686 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
7689 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
7690 string is "Windows 2006 SP2".
7692 Eliminated duplicate code in AcpiUtExecute* functions. Now that the
7694 code automatically repairs _HID-related strings, this type of code is no
7695 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
7698 Example Code and Data Size: These are the sizes for the OS-independent
7699 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7700 debug version of the code includes the debug output trace mechanism and
7702 much larger code and data size.
7705 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
7706 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
7708 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
7709 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
7711 2) iASL Compiler/Disassembler and Tools:
7713 iASL: Implemented additional compile-time validation for _HID strings.
7715 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
7718 the string must be exactly seven or eight characters. For both _HID and
7720 strings, all characters must be alphanumeric. ACPICA BZ 874.
7722 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
7723 descriptors that are mostly or all zeros, with the expectation that they
7725 be filled in at runtime. iASL now allows this as long as there is a
7727 tag" (name) associated with the descriptor, which gives the ASL a handle
7728 needed to modify the descriptor. ACPICA BZ 873.
7730 Added single-thread support to the generic Unix application OSL.
7732 for iASL support, this change removes the use of semaphores in the
7734 threaded ACPICA tools/applications - increasing performance. The
7735 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
7736 option. ACPICA BZ 879.
7738 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
7740 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
7742 iASL: Moved all compiler messages to a new file, aslmessages.h.
7744 ----------------------------------------
7745 15 September 2010. Summary of changes for version 20100915:
7747 1) ACPI CA Core Subsystem:
7749 Removed the AcpiOsDerivePciId OSL interface. The various host
7751 of this function were not OS-dependent and are now obsolete and can be
7752 removed from all host OSLs. This function has been replaced by
7753 AcpiHwDerivePciId, which is now part of the ACPICA core code.
7754 AcpiHwDerivePciId has been implemented without recursion. Adds one new
7755 module, hwpci.c. ACPICA BZ 857.
7757 Implemented a dynamic repair for _HID and _CID strings. The following
7758 problems are now repaired at runtime: 1) Remove a leading asterisk in the
7759 string, and 2) the entire string is uppercased. Both repairs are in
7760 accordance with the ACPI specification and will simplify host driver
7764 The ACPI_THREAD_ID type is no longer configurable, internally it is now
7765 always UINT64. This simplifies the ACPICA code, especially any printf
7767 UINT64 is the only common data type for all thread_id types across all
7768 operating systems. It is now up to the host OSL to cast the native
7770 type to UINT64 before returning the value to ACPICA (via
7772 Lin Ming, Bob Moore.
7774 Added the ACPI_INLINE type to enhance the ACPICA configuration. The
7776 keyword is not standard across compilers, and this type allows inline to
7778 configured on a per-compiler basis. Lin Ming.
7780 Made the system global AcpiGbl_SystemAwakeAndRunning publicly
7782 Added an extern for this boolean in acpixf.h. Some hosts utilize this
7784 during suspend/restore operations. ACPICA BZ 869.
7786 All code that implements error/warning messages with the "ACPI:" prefix
7788 been moved to a new module, utxferror.c.
7790 The UINT64_OVERLAY was moved to utmath.c, which is the only module where
7792 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
7794 Example Code and Data Size: These are the sizes for the OS-independent
7795 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7796 debug version of the code includes the debug output trace mechanism and
7798 much larger code and data size.
7801 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
7802 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
7804 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
7805 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
7807 2) iASL Compiler/Disassembler and Tools:
7809 iASL/Disassembler: Write ACPI errors to stderr instead of the output
7811 This keeps the output files free of random error messages that may
7813 from within the namespace/interpreter code. Used this opportunity to
7815 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
7816 866. Lin Ming, Bob Moore.
7818 Tools: update some printfs for ansi warnings on size_t. Handle width
7820 of size_t on 32-bit versus 64-bit generations. Lin Ming.
7822 ----------------------------------------
7823 06 August 2010. Summary of changes for version 20100806:
7825 1) ACPI CA Core Subsystem:
7827 Designed and implemented a new host interface to the _OSI support code.
7829 will allow the host to dynamically add or remove multiple _OSI strings,
7831 well as install an optional handler that is called for each _OSI
7833 Also added a new AML debugger command, 'osi' to display and modify the
7835 _OSI string table, and test support in the AcpiExec utility. See the
7837 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
7839 AcpiInstallInterface - Add an _OSI string.
7840 AcpiRemoveInterface - Delete an _OSI string.
7841 AcpiInstallInterfaceHandler - Install optional _OSI handler.
7843 AcpiOsValidateInterface - no longer used.
7845 source/components/utilities/utosi.c
7847 Re-introduced the support to enable multi-byte transfers for Embedded
7848 Controller (EC) operation regions. A reported problem was found to be a
7850 in the host OS, not in the multi-byte support. Previously, the maximum
7852 size passed to the EC operation region handler was a single byte. There
7854 often EC Fields larger than one byte that need to be transferred, and it
7856 useful for the EC driver to lock these as a single transaction. This
7858 enables single transfers larger than 8 bits. This effectively changes the
7859 access to the EC space from ByteAcc to AnyAcc, and will probably require
7860 changes to the host OS Embedded Controller driver to enable 16/32/64/256-
7862 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
7864 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
7865 prototype in acpiosxf.h had the output value pointer as a (void *).
7866 It should be a (UINT64 *). This may affect some host OSL code.
7868 Fixed a couple problems with the recently modified Linux makefiles for
7870 and AcpiExec. These new makefiles place the generated object files in the
7871 local directory so that there can be no collisions between the files that
7873 shared between them that are compiled with different options.
7875 Example Code and Data Size: These are the sizes for the OS-independent
7876 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7877 debug version of the code includes the debug output trace mechanism and
7879 much larger code and data size.
7882 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7883 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
7885 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
7886 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
7888 2) iASL Compiler/Disassembler and Tools:
7890 iASL/Disassembler: Added a new option (-da, "disassemble all") to load
7892 namespace from and disassemble an entire group of AML files. Useful for
7893 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
7895 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
7897 iASL: Allow multiple invocations of -e option. This change allows
7899 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
7903 ----------------------------------------
7904 02 July 2010. Summary of changes for version 20100702:
7906 1) ACPI CA Core Subsystem:
7908 Implemented several updates to the recently added GPE reference count
7909 support. The model for "wake" GPEs is changing to give the host OS
7911 control of these GPEs. Eventually, the ACPICA core will not execute any
7913 methods, since the host already must execute them. Also, additional
7915 were made to help ensure that the reference counts are kept in proper
7916 synchronization with reality. Rafael J. Wysocki.
7918 1) Ensure that GPEs are not enabled twice during initialization.
7919 2) Ensure that GPE enable masks stay in sync with the reference count.
7920 3) Do not inadvertently enable GPEs when writing GPE registers.
7921 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
7922 interface. This interface will set or clear individual GPEs for wakeup.
7923 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These
7925 are now used for "runtime" GPEs only.
7927 Changed the behavior of the GPE install/remove handler interfaces. The
7930 no longer disabled during this process, as it was found to cause problems
7932 some machines. Rafael J. Wysocki.
7934 Reverted a change introduced in version 20100528 to enable Embedded
7935 Controller multi-byte transfers. This change was found to cause problems
7937 Index Fields and possibly Bank Fields. It will be reintroduced when these
7938 problems have been resolved.
7940 Fixed a problem with references to Alias objects within Package Objects.
7942 reference to an Alias within the definition of a Package was not always
7943 resolved properly. Aliases to objects like Processors, Thermal zones,
7945 were resolved to the actual object instead of a reference to the object
7948 should be. Package objects are only allowed to contain integer, string,
7949 buffer, package, and reference objects. Redhat bugzilla 608648.
7951 Example Code and Data Size: These are the sizes for the OS-independent
7952 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7953 debug version of the code includes the debug output trace mechanism and
7955 much larger code and data size.
7958 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7959 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
7961 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7962 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
7964 2) iASL Compiler/Disassembler and Tools:
7966 iASL: Implemented a new compiler subsystem to allow definition and
7967 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
7969 are called "ACPI Data Tables", and the new compiler is the "Data Table
7970 Compiler". This compiler is intended to simplify the existing error-prone
7971 process of creating these tables for the BIOS, as well as allowing the
7972 disassembly, modification, recompilation, and override of existing ACPI
7974 tables. See the iASL User Guide for detailed information.
7976 iASL: Implemented a new Template Generator option in support of the new
7978 Table Compiler. This option will create examples of all known ACPI tables
7979 that can be used as the basis for table development. See the iASL
7980 documentation and the -T option.
7982 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
7985 Updated the Linux makefiles for iASL and AcpiExec to place the generated
7986 object files in the local directory so that there can be no collisions
7987 between the shared files between them that are generated with different
7990 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
7992 the #define __APPLE__ to enable this support.
7994 ----------------------------------------
7995 28 May 2010. Summary of changes for version 20100528:
7997 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
7998 available at www.acpi.info. This is primarily an errata release.
8000 1) ACPI CA Core Subsystem:
8002 Undefined ACPI tables: We are looking for the definitions for the
8004 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
8006 Implemented support to enable multi-byte transfers for Embedded
8008 (EC) operation regions. Previously, the maximum data size passed to the
8010 operation region handler was a single byte. There are often EC Fields
8012 than one byte that need to be transferred, and it is useful for the EC
8014 to lock these as a single transaction. This change enables single
8016 larger than 8 bits. This effectively changes the access to the EC space
8018 ByteAcc to AnyAcc, and will probably require changes to the host OS
8020 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
8022 transfers. Alexey Starikovskiy, Lin Ming
8024 Implemented a performance enhancement for namespace search and access.
8026 change enhances the performance of namespace searches and walks by adding
8028 backpointer to the parent in each namespace node. On large namespaces,
8030 change can improve overall ACPI performance by up to 9X. Adding a pointer
8032 each namespace node increases the overall size of the internal namespace
8034 about 5%, since each namespace entry usually consists of both a namespace
8035 node and an ACPI operand object. However, this is the first growth of the
8036 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
8038 Implemented a performance optimization that reduces the number of
8040 walks. On control method exit, only walk the namespace if the method is
8042 to have created namespace objects outside of its local scope. Previously,
8044 entire namespace was traversed on each control method exit. This change
8046 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
8049 Added support to truncate I/O addresses to 16 bits for Windows
8051 Some ASL code has been seen in the field that inadvertently has bits set
8052 above bit 15. This feature is optional and is enabled if the BIOS
8054 any Windows OSI strings. It can also be enabled by the host OS. Matthew
8057 Added support to limit the maximum time for the ASL Sleep() operator. To
8058 prevent accidental deep sleeps, limit the maximum time that Sleep() will
8059 actually sleep. Configurable, the default maximum is two seconds. ACPICA
8062 Added run-time validation support for the _WDG and_WED Microsoft
8064 methods. These objects are defined by "Windows Instrumentation", and are
8066 part of the ACPI spec. ACPICA BZ 860.
8068 Expanded all statistic counters used during namespace and device
8069 initialization from 16 to 32 bits in order to support very large
8072 Replaced all instances of %d in printf format specifiers with %u since
8074 all integers in ACPICA are unsigned.
8076 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
8080 Example Code and Data Size: These are the sizes for the OS-independent
8081 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8082 debug version of the code includes the debug output trace mechanism and
8084 much larger code and data size.
8087 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
8088 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
8090 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
8091 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
8093 2) iASL Compiler/Disassembler and Tools:
8095 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
8096 methods. These objects are defined by "Windows Instrumentation", and are
8098 part of the ACPI spec. ACPICA BZ 860.
8100 AcpiExec: added option to disable the memory tracking mechanism. The -dt
8101 option will disable the tracking mechanism, which improves performance
8104 AcpiExec: Restructured the command line options into -d (disable) and -e
8107 ----------------------------------------
8108 28 April 2010. Summary of changes for version 20100428:
8110 1) ACPI CA Core Subsystem:
8112 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
8113 including FADT-based and GPE Block Devices, execute any _PRW methods in
8115 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
8116 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
8117 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
8118 Devices. Provides compatibility with other ACPI implementations. Two new
8119 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
8122 Fixed a regression introduced in version 20100331 within the table
8124 where initial table loading could fail. This was introduced in the fix
8126 AcpiReallocateRootTable. Also, renamed some of fields in the table
8128 data structures to clarify their meaning and use.
8130 Fixed a possible allocation overrun during internal object copy in
8131 AcpiUtCopySimpleObject. The original code did not correctly handle the
8133 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
8136 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
8137 possible access beyond end-of-allocation. Also, now fully validate
8139 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
8141 Example Code and Data Size: These are the sizes for the OS-independent
8142 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8143 debug version of the code includes the debug output trace mechanism and
8145 much larger code and data size.
8148 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
8149 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
8151 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
8152 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
8154 2) iASL Compiler/Disassembler and Tools:
8156 iASL: Implemented Min/Max/Len/Gran validation for address resource
8157 descriptors. This change implements validation for the address fields
8159 are common to all address-type resource descriptors. These checks are
8160 implemented: Checks for valid Min/Max, length within the Min/Max window,
8161 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
8163 table 6-40 in the ACPI 4.0a specification. Also split the large
8165 and aslrestype2.c files into five new files. ACPICA BZ 840.
8167 iASL: Added support for the _Wxx predefined names. This support was
8169 and these names were not recognized by the compiler as valid predefined
8170 names. ACPICA BZ 851.
8172 iASL: Added an error for all predefined names that are defined to return
8174 value and thus must be implemented as Control Methods. These include all
8176 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
8177 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
8179 iASL: Implemented the -ts option to emit hex AML data in ASL format, as
8181 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
8183 dynamically loaded via the Load() operator. Also cleaned up output for
8186 ta and -tc options. ACPICA BZ 853.
8188 Tests: Added a new file with examples of extended iASL error checking.
8189 Demonstrates the advanced error checking ability of the iASL compiler.
8190 Available at tests/misc/badcode.asl.
8192 ----------------------------------------
8193 31 March 2010. Summary of changes for version 20100331:
8195 1) ACPI CA Core Subsystem:
8197 Completed a major update for the GPE support in order to improve support
8199 shared GPEs and to simplify both host OS and ACPICA code. Added a
8201 count mechanism to support shared GPEs that require multiple device
8203 Several external interfaces have changed. One external interface has been
8204 removed. One new external interface was added. Most of the GPE external
8205 interfaces now use the GPE spinlock instead of the events mutex (and the
8206 Flags parameter for many GPE interfaces has been removed.) See the
8208 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
8210 Wysocki. ACPICA BZ 831.
8213 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
8219 Implemented write support for DataTable operation regions. These regions
8221 defined via the DataTableRegion() operator. Previously, only read support
8223 implemented. The ACPI specification allows DataTableRegions to be
8227 Implemented a new subsystem option to force a copy of the DSDT to local
8228 memory. Optionally copy the entire DSDT to local memory (instead of
8230 mapping it.) There are some (albeit very rare) BIOSs that corrupt or
8232 the original DSDT, creating the need for this option. Default is FALSE,
8236 Implemented detection of a corrupted or replaced DSDT. This change adds
8237 support to detect a DSDT that has been corrupted and/or replaced from
8239 the OS (by firmware). This is typically catastrophic for the system, but
8241 been seen on some machines. Once this problem has been detected, the DSDT
8242 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
8244 Fixed two problems with AcpiReallocateRootTable during the root table
8246 When copying the root table to the new allocation, the length used was
8247 incorrect. The new size was used instead of the current table size,
8249 too much data was copied. Also, the count of available slots for ACPI
8251 was not set correctly. Alexey Starikovskiy, Bob Moore.
8253 Example Code and Data Size: These are the sizes for the OS-independent
8254 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8255 debug version of the code includes the debug output trace mechanism and
8257 much larger code and data size.
8260 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
8261 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
8263 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
8264 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
8266 2) iASL Compiler/Disassembler and Tools:
8268 iASL: Implement limited typechecking for values returned from predefined
8269 control methods. The type of any returned static (unnamed) object is now
8270 validated. For example, Return(1). ACPICA BZ 786.
8272 iASL: Fixed a predefined name object verification regression. Fixes a
8274 introduced in version 20100304. An error is incorrectly generated if a
8275 predefined name is declared as a static named object with a value defined
8276 using the keywords "Zero", "One", or "Ones". Lin Ming.
8278 iASL: Added Windows 7 support for the -g option (get local ACPI tables)
8280 reducing the requested registry access rights. ACPICA BZ 842.
8282 Disassembler: fixed a possible fault when generating External()
8284 Introduced in commit ae7d6fd: Properly handle externals with parent-
8286 (carat). Fixes a string length allocation calculation. Lin Ming.
8288 ----------------------------------------
8289 04 March 2010. Summary of changes for version 20100304:
8291 1) ACPI CA Core Subsystem:
8293 Fixed a possible problem with the AML Mutex handling function
8294 AcpiExReleaseMutex where the function could fault under the very rare
8295 condition when the interpreter has blocked, the interpreter lock is
8297 the interpreter is then reentered via the same thread, and attempts to
8298 acquire an AML mutex that was previously acquired. FreeBSD report 140979.
8302 Implemented additional configuration support for the AML "Debug Object".
8303 Output from the debug object can now be enabled via a global variable,
8304 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
8306 This debug output is now available in the release version of ACPICA
8308 of just the debug version. Also, the entire debug output module can now
8310 configured out of the ACPICA build if desired. One new file added,
8311 executer/exdebug.c. Lin Ming, Bob Moore.
8313 Added header support for the ACPI MCHI table (Management Controller Host
8314 Interface Table). This table was added in ACPI 4.0, but the defining
8316 has only recently become available.
8318 Standardized output of integer values for ACPICA warnings/errors. Always
8320 0x prefix for hex output, always use %u for unsigned integer decimal
8322 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
8324 invocations.) These invocations were converted from the original
8325 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
8327 Example Code and Data Size: These are the sizes for the OS-independent
8328 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8329 debug version of the code includes the debug output trace mechanism and
8331 much larger code and data size.
8334 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
8335 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
8337 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
8338 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
8340 2) iASL Compiler/Disassembler and Tools:
8342 iASL: Implemented typechecking support for static (non-control method)
8343 predefined named objects that are declared with the Name() operator. For
8344 example, the type of this object is now validated to be of type Integer:
8345 Name(_BBN, 1). This change migrates the compiler to using the core
8347 name table instead of maintaining a local version. Added a new file,
8348 aslpredef.c. ACPICA BZ 832.
8350 Disassembler: Added support for the ACPI 4.0 MCHI table.
8352 ----------------------------------------
8353 21 January 2010. Summary of changes for version 20100121:
8355 1) ACPI CA Core Subsystem:
8357 Added the 2010 copyright to all module headers and signons. This affects
8358 virtually every file in the ACPICA core subsystem, the iASL compiler, the
8359 tools/utilities, and the test suites.
8361 Implemented a change to the AcpiGetDevices interface to eliminate
8363 invocations of the _STA method. In the case where a specific _HID is
8364 requested, do not run _STA until a _HID match is found. This eliminates
8365 potentially dozens of _STA calls during a search for a particular
8367 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
8369 Implemented an additional repair for predefined method return values.
8371 to repair unexpected NULL elements within returned Package objects.
8374 Integer of value zero, a NULL String, or a zero-length Buffer as
8376 ACPICA BZ 818. Lin Ming, Bob Moore.
8378 Removed the obsolete ACPI_INTEGER data type. This type was introduced as
8380 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
8382 64-bit AML integers). It is now obsolete and this change removes it from
8384 ACPICA code base, replaced by UINT64. The original typedef has been
8386 for now for compatibility with existing device driver code. ACPICA BZ
8389 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
8391 the parse tree object.
8393 Added additional warning options for the gcc-4 generation. Updated the
8395 accordingly. This includes some code restructuring to eliminate
8397 code, elimination of some gotos, elimination of unused return values,
8399 additional casting, and removal of redundant declarations.
8401 Example Code and Data Size: These are the sizes for the OS-independent
8402 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8403 debug version of the code includes the debug output trace mechanism and
8405 much larger code and data size.
8408 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
8409 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
8411 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
8412 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
8414 2) iASL Compiler/Disassembler and Tools:
8416 No functional changes for this release.
8418 ----------------------------------------
8419 14 December 2009. Summary of changes for version 20091214:
8421 1) ACPI CA Core Subsystem:
8423 Enhanced automatic data type conversions for predefined name repairs.
8425 change expands the automatic repairs/conversions for predefined name
8427 values to make Integers, Strings, and Buffers fully interchangeable.
8430 Buffer can be converted to a Package of Integers if necessary. The
8432 module was completely restructured. Lin Ming, Bob Moore.
8434 Implemented automatic removal of null package elements during predefined
8436 repairs. This change will automatically remove embedded and trailing NULL
8437 package elements from returned package objects that are defined to
8440 variable number of sub-packages. The driver is then presented with a
8442 with no null elements to deal with. ACPICA BZ 819.
8444 Implemented a repair for the predefined _FDE and _GTM names. The expected
8445 return value for both names is a Buffer of 5 DWORDs. This repair fixes
8447 possible problems (both seen in the field), where a package of integers
8449 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
8452 Implemented additional module-level code support. This change will
8454 execute module-level code that is not at the root of the namespace (under
8456 Device object, etc.). Now executes the code within the current scope
8458 of the root. ACPICA BZ 762. Lin Ming.
8460 Fixed possible mutex acquisition errors when running _REG methods. Fixes
8462 problem where mutex errors can occur when running a _REG method that is
8464 the same scope as a method-defined operation region or an operation
8466 under a module-level IF block. This type of code is rare, so the problem
8468 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
8470 Fixed a possible memory leak during module-level code execution. An
8472 could be leaked for each block of executed module-level code if the
8473 interpreter slack mode is enabled This change deletes any implicitly
8475 object from the module-level code block. Lin Ming.
8477 Removed messages for successful predefined repair(s). The repair
8479 was considered too wordy. Now, messages are only unconditionally emitted
8481 the return object cannot be repaired. Existing messages for successful
8482 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
8485 Example Code and Data Size: These are the sizes for the OS-independent
8486 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8487 debug version of the code includes the debug output trace mechanism and
8489 much larger code and data size.
8492 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
8493 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
8495 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
8496 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
8498 2) iASL Compiler/Disassembler and Tools:
8500 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
8502 were no longer automatically removed at the termination of the compile.
8504 acpiexec: Implemented the -f option to specify default region fill value.
8505 This option specifies the value used to initialize buffers that simulate
8506 operation regions. Default value is zero. Useful for debugging problems
8508 depend on a specific initial value for a region or field.
8510 ----------------------------------------
8511 12 November 2009. Summary of changes for version 20091112:
8513 1) ACPI CA Core Subsystem:
8515 Implemented a post-order callback to AcpiWalkNamespace. The existing
8516 interface only has a pre-order callback. This change adds an additional
8517 parameter for a post-order callback which will be more useful for bus
8519 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
8521 Modified the behavior of the operation region memory mapping cache for
8522 SystemMemory. Ensure that the memory mappings created for operation
8524 do not cross 4K page boundaries. Crossing a page boundary while mapping
8525 regions can cause kernel warnings on some hosts if the pages have
8527 attributes. Such regions are probably BIOS bugs, and this is the
8529 Linux BZ 14445. Lin Ming.
8531 Implemented an automatic repair for predefined methods that must return
8532 sorted lists. This change will repair (by sorting) packages returned by
8534 _PSS, and _TSS. Drivers can now assume that the packages are correctly
8536 and do not contain NULL package elements. Adds one new file,
8537 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
8539 Fixed a possible fault during predefined name validation if a return
8541 object contains NULL elements. Also adds a warning if a NULL element is
8542 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
8544 include repair or removal of all such NULL elements where possible.
8546 Implemented additional module-level executable AML code support. This
8548 will execute module-level code that is not at the root of the namespace
8549 (under a Device object, etc.) at table load time. Module-level executable
8551 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
8553 Implemented a new internal function to create Integer objects. This
8555 simplifies miscellaneous object creation code. ACPICA BZ 823.
8557 Reduced the severity of predefined repair messages, Warning to Info.
8559 the object was successfully repaired, a warning is too severe. Reduced to
8561 info message for now. These messages may eventually be changed to debug-
8565 Example Code and Data Size: These are the sizes for the OS-independent
8566 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8567 debug version of the code includes the debug output trace mechanism and
8569 much larger code and data size.
8572 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
8573 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
8575 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
8576 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
8578 2) iASL Compiler/Disassembler and Tools:
8580 iASL: Implemented Switch() with While(1) so that Break works correctly.
8582 change correctly implements the Switch operator with a surrounding
8584 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
8586 iASL: Added a message if a package initializer list is shorter than
8588 length. Adds a new remark for a Package() declaration if an initializer
8590 exists, but is shorter than the declared length of the package. Although
8591 technically legal, this is probably a coding error and it is seen in the
8592 field. ACPICA BZ 815. Lin Ming, Bob Moore.
8594 iASL: Fixed a problem where the compiler could fault after the maximum
8596 of errors was reached (200).
8598 acpixtract: Fixed a possible warning for pointer cast if the compiler
8600 level set very high.
8602 ----------------------------------------
8603 13 October 2009. Summary of changes for version 20091013:
8605 1) ACPI CA Core Subsystem:
8607 Fixed a problem where an Operation Region _REG method could be executed
8609 than once. If a custom address space handler is installed by the host
8611 the "initialize operation regions" phase of the ACPICA initialization,
8613 _REG methods for that address space could be executed twice. This change
8614 fixes the problem. ACPICA BZ 427. Lin Ming.
8616 Fixed a possible memory leak for the Scope() ASL operator. When the exact
8617 invocation of "Scope(\)" is executed (change scope to root), one internal
8618 operand object was leaked. Lin Ming.
8620 Implemented a run-time repair for the _MAT predefined method. If the _MAT
8621 return value is defined as a Field object in the AML, and the field
8622 size is less than or equal to the default width of an integer (32 or
8624 can incorrectly return an Integer instead of a Buffer. ACPICA now
8625 automatically repairs this problem. ACPICA BZ 810.
8627 Implemented a run-time repair for the _BIF and _BIX predefined methods.
8629 "OEM Information" field is often incorrectly returned as an Integer with
8630 value zero if the field is not supported by the platform. This is due to
8632 ambiguity in the ACPI specification. The field should always be a string.
8633 ACPICA now automatically repairs this problem by returning a NULL string
8634 within the returned Package. ACPICA BZ 807.
8636 Example Code and Data Size: These are the sizes for the OS-independent
8637 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8638 debug version of the code includes the debug output trace mechanism and
8640 much larger code and data size.
8643 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
8644 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
8646 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
8647 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
8649 2) iASL Compiler/Disassembler and Tools:
8651 Disassembler: Fixed a problem where references to external symbols that
8652 contained one or more parent-prefixes (carats) were not handled
8654 possibly causing a fault. ACPICA BZ 806. Lin Ming.
8656 Disassembler: Restructured the code so that all functions that handle
8657 external symbols are in a single module. One new file is added,
8660 AML Debugger: Added a max count argument for the Batch command (which
8661 executes multiple predefined methods within the namespace.)
8663 iASL: Updated the compiler documentation (User Reference.) Available at
8664 http://www.acpica.org/documentation/. ACPICA BZ 750.
8666 AcpiXtract: Updated for Lint and other formatting changes. Close all open
8669 ----------------------------------------
8670 03 September 2009. Summary of changes for version 20090903:
8672 1) ACPI CA Core Subsystem:
8674 For Windows Vista compatibility, added the automatic execution of an _INI
8675 method located at the namespace root (\_INI). This method is executed at
8676 table load time. This support is in addition to the automatic execution
8678 \_SB._INI. Lin Ming.
8680 Fixed a possible memory leak in the interpreter for AML package objects
8682 the package initializer list is longer than the defined size of the
8684 This apparently can only happen if the BIOS changes the package size on
8686 fly (seen in a _PSS object), as ASL compilers do not allow this. The
8687 interpreter will truncate the package to the defined size (and issue an
8689 message), but previously could leave the extra objects undeleted if they
8691 pre-created during the argument processing (such is the case if the
8693 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
8695 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
8696 This has been reported in the field. Previously, ACPICA would zero out
8698 buffer/string. Now, the operation is treated as a noop. Provides Windows
8699 compatibility. ACPICA BZ 803. Lin Ming.
8701 Removed an extraneous error message for ASL constructs of the form
8702 Store(LocalX,LocalX) when LocalX is uninitialized. These curious
8704 are seen in many BIOSs and are once again treated as NOOPs and no error
8706 emitted when they are encountered. ACPICA BZ 785.
8708 Fixed an extraneous warning message if a _DSM reserved method returns a
8709 Package object. _DSM can return any type of object, so validation on the
8710 return type cannot be performed. ACPICA BZ 802.
8712 Example Code and Data Size: These are the sizes for the OS-independent
8713 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8714 debug version of the code includes the debug output trace mechanism and
8716 much larger code and data size.
8719 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
8720 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
8722 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
8723 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
8725 2) iASL Compiler/Disassembler and Tools:
8727 iASL: Fixed a problem with the use of the Alias operator and Resource
8728 Templates. The correct alias is now constructed and no error is emitted.
8731 iASL: Implemented the -I option to specify additional search directories
8733 include files. Allows multiple additional search paths for include files.
8734 Directories are searched in the order specified on the command line
8736 the local directory is searched.) ACPICA BZ 800.
8738 iASL: Fixed a problem where the full pathname for include files was not
8739 emitted for warnings/errors. This caused the IDE support to not work
8740 properly. ACPICA BZ 765.
8742 iASL: Implemented the -@ option to specify a Windows-style response file
8743 containing additional command line options. ACPICA BZ 801.
8745 AcpiExec: Added support to load multiple AML files simultaneously (such
8748 DSDT and multiple SSDTs). Also added support for wildcards within the AML
8749 pathname. These features allow all machine tables to be easily loaded and
8750 debugged together. ACPICA BZ 804.
8752 Disassembler: Added missing support for disassembly of HEST table Error
8756 ----------------------------------------
8757 30 July 2009. Summary of changes for version 20090730:
8759 The ACPI 4.0 implementation for ACPICA is complete with this release.
8761 1) ACPI CA Core Subsystem:
8763 ACPI 4.0: Added header file support for all new and changed ACPI tables.
8764 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
8766 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
8768 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
8770 have been some ACPI 4.0 changes to other existing tables. Split the large
8771 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
8773 ACPI 4.0: Implemented predefined name validation for all new names. There
8775 31 new names in ACPI 4.0. The predefined validation module was split into
8777 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
8779 Implemented support for so-called "module-level executable code". This is
8780 executable AML code that exists outside of any control method and is
8782 to be executed at table load time. Although illegal since ACPI 2.0, this
8784 of code still exists and is apparently still being created. Blocks of
8786 code are now detected and executed as intended. Currently, the code
8788 must exist under either an If, Else, or While construct; these are the
8789 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
8791 Implemented an automatic dynamic repair for predefined names that return
8792 nested Package objects. This applies to predefined names that are defined
8794 return a variable-length Package of sub-packages. If the number of sub-
8795 packages is one, BIOS code is occasionally seen that creates a simple
8797 package with no sub-packages. This code attempts to fix the problem by
8798 wrapping a new package object around the existing package. These methods
8800 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
8804 Fixed a regression introduced in 20090625 for the AcpiGetDevices
8806 The _HID/_CID matching was broken and no longer matched IDs correctly.
8810 Fixed a problem with AcpiReset where the reset would silently fail if the
8811 register was one of the protected I/O ports. AcpiReset now bypasses the
8813 validation mechanism. This may eventually be driven into the
8817 Fixed a regression related to the recent update of the AcpiRead/Write
8818 interfaces. A sleep/suspend could fail if the optional PM2 Control
8820 does not exist during an attempt to write the Bus Master Arbitration bit.
8821 (However, some hosts already delete the code that writes this bit, and
8823 code may in fact be obsolete at this date.) ACPICA BZ 799.
8825 Fixed a problem where AcpiTerminate could fault if inadvertently called
8827 in succession. ACPICA BZ 795.
8829 Example Code and Data Size: These are the sizes for the OS-independent
8830 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8831 debug version of the code includes the debug output trace mechanism and
8833 much larger code and data size.
8836 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
8837 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
8839 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
8840 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
8842 2) iASL Compiler/Disassembler and Tools:
8844 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
8845 changes to existing tables. ACPICA BZ 775.
8847 ----------------------------------------
8848 25 June 2009. Summary of changes for version 20090625:
8850 The ACPI 4.0 Specification was released on June 16 and is available at
8851 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
8852 continue for the next few releases.
8854 1) ACPI CA Core Subsystem:
8856 ACPI 4.0: Implemented interpreter support for the IPMI operation region
8857 address space. Includes support for bi-directional data buffers and an
8859 address space handler (to be installed by an IPMI device driver.) ACPICA
8863 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
8865 support in both the header files and the disassembler.
8867 Completed a major update for the AcpiGetObjectInfo external interface.
8869 - Support for variable, unlimited length HID, UID, and CID strings.
8870 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
8872 - Call the _SxW power methods on behalf of a device object.
8873 - Determine if a device is a PCI root bridge.
8874 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
8875 These changes will require an update to all callers of this interface.
8877 the updated ACPICA Programmer Reference for details. One new source file
8879 been added - utilities/utids.c. ACPICA BZ 368, 780.
8881 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
8882 transfers. The Value parameter has been extended from 32 bits to 64 bits
8884 order to support new ACPI 4.0 tables. These changes will require an
8887 all callers of these interfaces. See the ACPICA Programmer Reference for
8888 details. ACPICA BZ 768.
8890 Fixed several problems with AcpiAttachData. The handler was not invoked
8892 the host node was deleted. The data sub-object was not automatically
8894 when the host node was deleted. The interface to the handler had an
8896 parameter, this was removed. ACPICA BZ 778.
8898 Enhanced the function that dumps ACPI table headers. All non-printable
8899 characters in the string fields are now replaced with '?' (Signature,
8901 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
8902 these fields are occasionally seen in the field. ACPICA BZ 788.
8904 Fixed a problem with predefined method repair code where the code that
8905 attempts to repair/convert an object of incorrect type is only executed
8907 the first time the predefined method is called. The mechanism that
8909 warnings on subsequent calls was interfering with the repair mechanism.
8912 Fixed a possible memory leak in the predefined validation/repair code
8915 buffer is automatically converted to an expected string object.
8917 Removed obsolete 16-bit files from the distribution and from the current
8919 tree head. ACPICA BZ 776.
8921 Example Code and Data Size: These are the sizes for the OS-independent
8922 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8923 debug version of the code includes the debug output trace mechanism and
8925 much larger code and data size.
8928 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
8929 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
8931 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
8932 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
8934 2) iASL Compiler/Disassembler and Tools:
8936 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
8937 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
8939 ACPI 4.0: iASL - implemented compile-time validation support for all new
8940 predefined names and control methods (31 total). ACPICA BZ 769.
8942 ----------------------------------------
8943 21 May 2009. Summary of changes for version 20090521:
8945 1) ACPI CA Core Subsystem:
8947 Disabled the preservation of the SCI enable bit in the PM1 control
8949 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
8952 a "preserved" bit - "OSPM always preserves this bit position", section
8953 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
8954 because the bit needs to be explicitly set by the OS as a workaround. No
8955 machines fail if the bit is not preserved. Therefore, ACPICA no longer
8956 attempts to preserve this bit.
8958 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
8959 incorrectly formed _PRT package could cause a fault. Added validation to
8960 ensure that each package element is actually a sub-package.
8962 Implemented a new interface to install or override a single control
8964 AcpiInstallMethod. This interface is useful when debugging in order to
8966 an existing method or to install a missing method without having to
8968 the entire ACPI table. See the ACPICA Programmer Reference for use and
8969 examples. Lin Ming, Bob Moore.
8971 Fixed several reference count issues with the DdbHandle object that is
8972 created from a Load or LoadTable operator. Prevent premature deletion of
8974 object. Also, mark the object as invalid once the table has been
8976 This is needed because the handle itself may not be deleted after the
8978 unload, depending on whether it has been stored in a named object by the
8981 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
8982 mutexes of the same sync level are acquired but then not released in
8984 opposite order, the internally maintained Current Sync Level becomes
8986 and can cause subsequent execution errors. ACPICA BZ 471.
8988 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
8989 specification has been changed to make the SyncLevel for mutex objects
8991 useful. When releasing a mutex, the SyncLevel of the mutex must now be
8993 same as the current sync level. This makes more sense than the previous
8995 (SyncLevel less than or equal). This change updates the code to match the
8998 Fixed a problem with the local version of the AcpiOsPurgeCache function.
9000 (local) cache must be locked during all cache object deletions. Andrew
9003 Updated the Load operator to use operation region interfaces. This
9005 direct memory mapping with region access calls. Now, all region accesses
9007 through the installed region handler as they should.
9009 Simplified and optimized the NsGetNextNode function. Reduced parameter
9011 and reduced code for this frequently used function.
9013 Example Code and Data Size: These are the sizes for the OS-independent
9014 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9015 debug version of the code includes the debug output trace mechanism and
9017 much larger code and data size.
9020 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
9021 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
9023 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
9024 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
9026 2) iASL Compiler/Disassembler and Tools:
9028 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
9030 with sub-table disassembly and handling invalid sub-tables. Attempt
9032 after an invalid sub-table ID.
9034 ----------------------------------------
9035 22 April 2009. Summary of changes for version 20090422:
9037 1) ACPI CA Core Subsystem:
9039 Fixed a compatibility issue with the recently released I/O port
9041 mechanism. For windows compatibility, 1) On a port protection violation,
9042 simply ignore the request and do not return an exception (allow the
9044 method to continue execution.) 2) If only part of the request overlaps a
9045 protected port, read/write the individual ports that are not protected.
9049 Enhanced the execution of the ASL/AML BreakPoint operator so that it
9051 breaks into the AML debugger if the debugger is present. This matches the
9052 ACPI-defined behavior.
9054 Fixed several possible warnings related to the use of the configurable
9055 ACPI_THREAD_ID. This type can now be configured as either an integer or a
9056 pointer with no warnings. Also fixes several warnings in printf-like
9057 statements for the 64-bit build when the type is configured as a pointer.
9060 Fixed a number of possible warnings when compiling with gcc 4+ (depending
9062 warning options.) Examples include printf formats, aliasing, unused
9064 missing prototypes, missing switch default statements, use of non-ANSI
9065 library functions, use of non-ANSI constructs. See generate/unix/Makefile
9067 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
9069 Example Code and Data Size: These are the sizes for the OS-independent
9070 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9071 debug version of the code includes the debug output trace mechanism and
9073 much larger code and data size.
9076 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
9077 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
9079 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
9080 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
9082 2) iASL Compiler/Disassembler and Tools:
9084 iASL: Fixed a generation warning from Bison 2.3 and fixed several
9089 iASL: Fixed a problem where the Unix/Linux versions of the compiler could
9091 correctly digest Windows/DOS formatted files (with CR/LF).
9093 iASL: Added a new option for "quiet mode" (-va) that produces only the
9094 compilation summary, not individual errors and warnings. Useful for large
9097 AcpiExec: Implemented a new option (-z) to enable a forced
9099 timeout that can be used to detect hang conditions during execution of
9101 code (includes both internal semaphores and AML-defined mutexes and
9104 Added new makefiles for the generation of acpica in a generic unix-like
9105 environment. These makefiles are intended to generate the acpica tools
9107 utilities from the original acpica git source tree structure.
9109 Test Suites: Updated and cleaned up the documentation files. Updated the
9110 copyrights to 2009, affecting all source files. Use the new version of
9112 with quiet mode. Increased the number of available semaphores in the
9114 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
9116 an alternate implementation of the semaphore timeout to allow aslts to
9117 execute fully on Cygwin.
9119 ----------------------------------------
9120 20 March 2009. Summary of changes for version 20090320:
9122 1) ACPI CA Core Subsystem:
9124 Fixed a possible race condition between AcpiWalkNamespace and dynamic
9126 unloads. Added a reader/writer locking mechanism to allow multiple
9128 namespace walks (readers), but block a dynamic table unload until it can
9130 exclusive write access to the namespace. This fixes a problem where a
9132 unload could (possibly catastrophically) delete the portion of the
9134 that is currently being examined by a walk. Adds a new file, utlock.c,
9136 implements the reader/writer lock mechanism. ACPICA BZ 749.
9138 Fixed a regression introduced in version 20090220 where a change to the
9140 handling could cause the ACPICA subsystem to access non-existent I/O
9143 Modified the handling of FADT register and table (FACS/DSDT) addresses.
9145 FADT can contain both 32-bit and 64-bit versions of these addresses.
9146 Previously, the 64-bit versions were favored, meaning that if both 32 and
9148 versions were valid, but not equal, the 64-bit version was used. This was
9149 found to cause some machines to fail. Now, in this case, the 32-bit
9151 is used instead. This now matches the Windows behavior.
9153 Implemented a new mechanism to protect certain I/O ports. Provides
9155 compatibility and protects the standard PC I/O ports from access via AML
9156 code. Adds a new file, hwvalid.c
9158 Fixed a possible extraneous warning message from the FADT support. The
9159 message warns of a 32/64 length mismatch between the legacy and GAS
9160 definitions for a register.
9162 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
9164 made obsolete by the port protection mechanism above. It was previously
9166 to validate the entire address range of an operation region, which could
9168 incorrect if the range included illegal ports, but fields within the
9169 operation region did not actually access those ports. Validation is now
9170 performed on a per-field basis instead of the entire region.
9172 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
9173 Ignored bits must be "preserved" according to the ACPI spec. Usually,
9175 means a read/modify/write when writing to the register. However, for
9177 registers, writing a one means clear the event. Writing a zero means
9179 the event (do not clear.) This behavior is clarified in the ACPI 4.0
9181 and the ACPICA code now simply always writes a zero to the ignored bit.
9183 Modified the handling of ignored bits for the PM1 A/B Control Registers.
9185 per the ACPI specification, for the control registers, preserve
9186 (read/modify/write) all bits that are defined as either reserved or
9189 Updated the handling of write-only bits in the PM1 A/B Control Registers.
9190 When reading the register, zero the write-only bits as per the ACPI spec.
9191 ACPICA BZ 443. Lin Ming.
9193 Removed "Linux" from the list of supported _OSI strings. Linux no longer
9194 wants to reply true to this request. The Windows strings are the only
9196 through the AML that are tested and known to work properly.
9199 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
9200 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
9202 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
9203 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
9205 2) iASL Compiler/Disassembler and Tools:
9207 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
9211 ----------------------------------------
9212 20 February 2009. Summary of changes for version 20090220:
9214 1) ACPI CA Core Subsystem:
9216 Optimized the ACPI register locking. Removed locking for reads from the
9218 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
9220 not required when reading the single-bit registers. The
9221 AcpiGetRegisterUnlocked function is no longer needed and has been
9223 This will improve performance for reads on these registers. ACPICA BZ
9226 Fixed the parameter validation for AcpiRead/Write. Now return
9227 AE_BAD_PARAMETER if the input register pointer is null, and
9230 the register has an address of zero. Previously, these cases simply
9232 AE_OK. For optional registers such as PM1B status/enable/control, the
9234 should check for a valid register address before calling. ACPICA BZ 748.
9236 Renamed the external ACPI bit register access functions. Renamed
9237 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
9238 functions. The new names are AcpiReadBitRegister and
9239 AcpiWriteBitRegister.
9240 Also, restructured the code for these functions by simplifying the code
9242 and condensing duplicate code to reduce code size.
9244 Added new functions to transparently handle the possibly split PM1 A/B
9245 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
9247 now handle the split registers for PM1 Status, Enable, and Control.
9252 Added a function to handle the PM1 control registers,
9253 AcpiHwWritePm1Control.
9254 This function writes both of the PM1 control registers (A/B). These
9256 are different than the PM1 A/B status and enable registers in that
9258 values can be written to the A/B registers. Most notably, the SLP_TYP
9260 can be different, as per the values returned from the _Sx predefined
9263 Removed an extra register write within AcpiHwClearAcpiStatus. This
9265 was writing an optional PM1B status register twice. The existing call to
9267 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
9269 register. ACPICA BZ 751.
9271 Split out the PM1 Status registers from the FADT. Added new globals for
9273 registers (A/B), similar to the way the PM1 Enable registers are handled.
9274 Instead of overloading the FADT Event Register blocks. This makes the
9276 clearer and less prone to error.
9278 Fixed the warning message for when the platform contains too many ACPI
9280 for the default size of the global root table data structure. The
9282 for the truncation value was incorrect.
9284 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
9285 obsolete macro, since it is now a simple reference to ->common.type.
9287 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
9289 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
9290 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
9291 simply SLEEP_TYPE. ACPICA BZ 754.
9293 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
9294 function is only needed on 64-bit host operating systems and is thus not
9295 included for 32-bit hosts.
9297 Debug output: print the input and result for invocations of the _OSI
9299 control method via the ACPI_LV_INFO debug level. Also, reduced some of
9301 verbosity of this debug level. Len Brown.
9303 Example Code and Data Size: These are the sizes for the OS-independent
9304 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9305 debug version of the code includes the debug output trace mechanism and
9307 much larger code and data size.
9310 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
9311 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
9313 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
9314 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
9316 2) iASL Compiler/Disassembler and Tools:
9318 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
9319 various legal performance profiles.
9321 ----------------------------------------
9322 23 January 2009. Summary of changes for version 20090123:
9324 1) ACPI CA Core Subsystem:
9326 Added the 2009 copyright to all module headers and signons. This affects
9327 virtually every file in the ACPICA core subsystem, the iASL compiler, and
9328 the tools/utilities.
9330 Implemented a change to allow the host to override any ACPI table,
9332 dynamically loaded tables. Previously, only the DSDT could be replaced by
9334 host. With this change, the AcpiOsTableOverride interface is called for
9336 table found in the RSDT/XSDT during ACPICA initialization, and also
9338 a table is dynamically loaded via the AML Load operator.
9340 Updated FADT flag definitions, especially the Boot Architecture flags.
9342 Debugger: For the Find command, automatically pad the input ACPI name
9344 underscores if the name is shorter than 4 characters. This enables a
9346 with the actual namespace entry which is itself padded with underscores.
9348 Example Code and Data Size: These are the sizes for the OS-independent
9349 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9350 debug version of the code includes the debug output trace mechanism and
9352 much larger code and data size.
9355 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
9356 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
9358 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
9359 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
9361 2) iASL Compiler/Disassembler and Tools:
9363 Fix build error under Bison-2.4.
9365 Disassembler: Enhanced FADT support. Added decoding of the Boot
9367 flags. Now decode all flags, regardless of the FADT version. Flag output
9368 includes the FADT version which first defined each flag.
9370 The iASL -g option now dumps the RSDT to a file (in addition to the FADT
9372 DSDT). Windows only.
9374 ----------------------------------------
9375 04 December 2008. Summary of changes for version 20081204:
9377 1) ACPI CA Core Subsystem:
9379 The ACPICA Programmer Reference has been completely updated and revamped
9381 this release. This includes updates to the external interfaces, OSL
9382 interfaces, the overview sections, and the debugger reference.
9384 Several new ACPICA interfaces have been implemented and documented in the
9385 programmer reference:
9386 AcpiReset - Writes the reset value to the FADT-defined reset register.
9387 AcpiDisableAllGpes - Disable all available GPEs.
9388 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
9389 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
9390 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
9391 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
9392 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
9394 Most of the public ACPI hardware-related interfaces have been moved to a
9396 file, components/hardware/hwxface.c
9398 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
9399 register lengths within the FADT are now used, and the low level ACPI
9400 register access no longer hardcodes the ACPI register lengths. Given that
9401 there may be some risk in actually trusting the FADT register lengths, a
9403 time option was added to fall back to the default hardcoded lengths if
9405 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
9406 option is set to true for now, and a warning is issued if a suspicious
9408 register length is overridden with the default value.
9410 Fixed a reference count issue in NsRepairObject. This problem was
9412 in version 20081031 as part of a fix to repair Buffer objects within
9415 Added semaphore support to the Linux/Unix application OS-services layer
9416 (OSL). ACPICA BZ 448. Lin Ming.
9418 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
9420 be implemented in the OSL, or will binary semaphores be used instead.
9422 Example Code and Data Size: These are the sizes for the OS-independent
9423 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9424 debug version of the code includes the debug output trace mechanism and
9426 much larger code and data size.
9429 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
9430 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
9432 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
9433 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
9435 2) iASL Compiler/Disassembler and Tools:
9437 iASL: Completed the '-e' option to include additional ACPI tables in
9440 aid with disassembly and External statement generation. ACPICA BZ 742.
9444 iASL: Removed the "named object in while loop" error. The compiler cannot
9445 determine how many times a loop will execute. ACPICA BZ 730.
9447 Disassembler: Implemented support for FADT revision 2 (MS extension).
9451 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
9454 ----------------------------------------
9455 31 October 2008. Summary of changes for version 20081031:
9457 1) ACPI CA Core Subsystem:
9459 Restructured the ACPICA header files into public/private. acpi.h now
9461 only the "public" acpica headers. All other acpica headers are "private"
9463 should not be included by acpica users. One new file, accommon.h is used
9465 include the commonly used private headers for acpica code generation.
9467 plans include moving all private headers to a new subdirectory.
9469 Implemented an automatic Buffer->String return value conversion for
9470 predefined ACPI methods. For these methods (such as _BIF), added
9472 conversion for return objects that are required to be a String, but a
9474 was found instead. This can happen when reading string battery data from
9476 operation region, because it used to be difficult to convert the data
9478 buffer to string from within the ASL. Ensures that the host OS is
9480 with a valid null-terminated string. Linux BZ 11822.
9482 Updated the FACS waking vector interfaces. Split
9483 AcpiSetFirmwareWakingVector
9484 into two: one for the 32-bit vector, another for the 64-bit vector. This
9486 required because the host OS must setup the wake much differently for
9488 vector (real vs. protected mode, etc.) and the interface itself should
9491 deciding which vector to use. Also, eliminated the
9492 GetFirmwareWakingVector
9493 interface, as it served no purpose (only the firmware reads the vector,
9495 only writes the vector.) ACPICA BZ 731.
9497 Implemented a mechanism to escape infinite AML While() loops. Added a
9499 counter to force exit from AML While loops if the count becomes too
9501 This can occur in poorly written AML when the hardware does not respond
9502 within a while loop and the loop does not implement a timeout. The
9504 loop count is configurable. A new exception code is returned when a loop
9506 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
9508 Optimized the execution of AML While loops. Previously, a control state
9509 object was allocated and freed for each execution of the loop. The
9510 optimization is to simply reuse the control state for each iteration.
9512 speeds up the raw loop execution time by about 5%.
9514 Enhanced the implicit return mechanism. For Windows compatibility, return
9516 implicit integer of value zero for methods that contain no executable
9518 Such methods are seen in the field as stubs (presumably), and can cause
9519 drivers to fail if they expect a return value. Lin Ming.
9521 Allow multiple backslashes as root prefixes in namepaths. In a fully
9522 qualified namepath, allow multiple backslash prefixes. This can happen
9524 is seen in the field) because of the use of a double-backslash in strings
9525 (since backslash is the escape character) causing confusion. ACPICA BZ
9529 Emit a warning if two different FACS or DSDT tables are discovered in the
9530 FADT. Checks if there are two valid but different addresses for the FACS
9532 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
9534 Consolidated the method argument count validation code. Merged the code
9536 validates control method argument counts into the predefined validation
9537 module. Eliminates possible multiple warnings for incorrect argument
9540 Implemented ACPICA example code. Includes code for ACPICA initialization,
9541 handler installation, and calling a control method. Available at
9542 source/tools/examples.
9544 Added a global pointer for FACS table to simplify internal FACS access.
9546 the global pointer instead of using AcpiGetTableByIndex for each FACS
9548 This simplifies the code for the Global Lock and the Firmware Waking
9551 Example Code and Data Size: These are the sizes for the OS-independent
9552 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9553 debug version of the code includes the debug output trace mechanism and
9555 much larger code and data size.
9558 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
9559 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
9561 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
9562 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
9564 2) iASL Compiler/Disassembler and Tools:
9566 iASL: Improved disassembly of external method calls. Added the -e option
9568 allow the inclusion of additional ACPI tables to help with the
9571 method invocations and the generation of external declarations during the
9572 disassembly. Certain external method invocations cannot be disassembled
9573 properly without the actual declaration of the method. Use the -e option
9575 include the table where the external method(s) are actually declared.
9577 useful for disassembling SSDTs that make method calls back to the master
9578 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl
9580 -e dsdt.aml ssdt1.aml
9582 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
9583 problem where the use of an alias within a namepath would result in a not
9584 found error or cause the compiler to fault. Also now allows forward
9585 references from the Alias operator itself. ACPICA BZ 738.
9587 ----------------------------------------
9588 26 September 2008. Summary of changes for version 20080926:
9590 1) ACPI CA Core Subsystem:
9592 Designed and implemented a mechanism to validate predefined ACPI methods
9594 objects. This code validates the predefined ACPI objects (objects whose
9596 start with underscore) that appear in the namespace, at the time they are
9597 evaluated. The argument count and the type of the returned object are
9598 validated against the ACPI specification. The purpose of this validation
9600 to detect problems with the BIOS-implemented predefined ACPI objects
9602 the results are returned to the ACPI-related drivers. Future enhancements
9604 include actual repair of incorrect return objects where possible. Two new
9605 files are nspredef.c and acpredef.h.
9607 Fixed a fault in the AML parser if a memory allocation fails during the
9609 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
9611 Fixed an issue with implicit return compatibility. This change improves
9613 implicit return mechanism to be more compatible with the MS interpreter.
9615 Ming, ACPICA BZ 349.
9617 Implemented support for zero-length buffer-to-string conversions. Allow
9619 length strings during interpreter buffer-to-string conversions. For
9621 during the ToDecimalString and ToHexString operators, as well as implicit
9622 conversions. Fiodor Suietov, ACPICA BZ 585.
9624 Fixed two possible memory leaks in the error exit paths of
9625 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
9627 similar in that they use a stack of state objects in order to eliminate
9628 recursion. The stack must be fully unwound and deallocated if an error
9629 occurs. Lin Ming. ACPICA BZ 383.
9631 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
9633 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
9634 Moore ACPICA BZ 442.
9636 Removed the obsolete version number in module headers. Removed the
9637 "$Revision" number that appeared in each module header. This version
9639 was useful under SourceSafe and CVS, but has no meaning under git. It is
9641 only incorrect, it could also be misleading.
9643 Example Code and Data Size: These are the sizes for the OS-independent
9644 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9645 debug version of the code includes the debug output trace mechanism and
9647 much larger code and data size.
9650 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
9651 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
9653 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
9654 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
9656 ----------------------------------------
9657 29 August 2008. Summary of changes for version 20080829:
9659 1) ACPI CA Core Subsystem:
9661 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
9662 Reference. Changes include the elimination of cheating on the Object
9664 for the DdbHandle subtype, addition of a reference class field to
9665 differentiate the various reference types (instead of an AML opcode), and
9667 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
9669 Reduce an error to a warning for an incorrect method argument count.
9670 Previously aborted with an error if too few arguments were passed to a
9671 control method via the external ACPICA interface. Now issue a warning
9673 and continue. Handles the case where the method inadvertently declares
9675 many arguments, but does not actually use the extra ones. Applies mainly
9677 the predefined methods. Lin Ming. Linux BZ 11032.
9679 Disallow the evaluation of named object types with no intrinsic value.
9681 AE_TYPE for objects that have no value and therefore evaluation is
9683 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
9685 these types were allowed, but an exception would be generated at some
9687 during the evaluation. Now, the error is generated up front.
9689 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
9690 (nsnames.c). Fixes a leak in the error exit path.
9692 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
9694 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
9696 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
9699 Removed obsolete and/or unused exception codes from the acexcep.h header.
9700 There is the possibility that certain device drivers may be affected if
9702 use any of these exceptions.
9704 The ACPICA documentation has been added to the public git source tree,
9706 acpica/documents. Included are the ACPICA programmer reference, the iASL
9707 compiler reference, and the changes.txt release logfile.
9709 Example Code and Data Size: These are the sizes for the OS-independent
9710 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9711 debug version of the code includes the debug output trace mechanism and
9713 much larger code and data size.
9716 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
9717 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
9719 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
9720 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
9722 2) iASL Compiler/Disassembler and Tools:
9724 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
9725 defines _SCP with 3 arguments. Previous versions defined it with only 1
9726 argument. iASL now allows both definitions.
9728 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
9730 length subtables when disassembling ACPI tables. Also fixed a couple of
9731 errors where a full 16-bit table type field was not extracted from the
9735 acpisrc: Improve comment counting mechanism for generating source code
9736 statistics. Count first and last lines of multi-line comments as
9738 not comment lines. Handle Linux legal header in addition to standard
9742 ----------------------------------------
9744 29 July 2008. Summary of changes for version 20080729:
9746 1) ACPI CA Core Subsystem:
9748 Fix a possible deadlock in the GPE dispatch. Remove call to
9749 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
9751 to acquire the GPE lock but can deadlock since the GPE lock is already
9753 at dispatch time. This code was introduced in version 20060831 as a
9755 to Linux BZ 6881 and has since been removed from Linux.
9757 Add a function to dereference returned reference objects. Examines the
9759 object from a call to AcpiEvaluateObject. Any Index or RefOf references
9761 automatically dereferenced in an attempt to return something useful
9763 reference types cannot be converted into an external ACPI_OBJECT.)
9765 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
9767 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
9768 subtables for the MADT and one new subtable for the SRAT. Includes
9769 disassembler and AcpiSrc support. Data from the Intel 64 Architecture
9771 Specification, June 2008.
9773 Additional error checking for pathname utilities. Add error check after
9775 calls to AcpiNsGetPathnameLength. Add status return from
9776 AcpiNsBuildExternalPath and check after all calls. Add parameter
9778 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
9780 Return status from the global init function AcpiUtGlobalInitialize. This
9782 used by both the kernel subsystem and the utilities such as iASL
9784 The function could possibly fail when the caches are initialized. Yang
9787 Add a function to decode reference object types to strings. Created for
9788 improved error messages.
9790 Improve object conversion error messages. Better error messages during
9792 conversion from internal to the external ACPI_OBJECT. Used for external
9794 to AcpiEvaluateObject.
9796 Example Code and Data Size: These are the sizes for the OS-independent
9797 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9798 debug version of the code includes the debug output trace mechanism and
9800 much larger code and data size.
9803 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
9804 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
9806 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
9807 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
9809 2) iASL Compiler/Disassembler and Tools:
9811 Debugger: fix a possible hang when evaluating non-methods. Fixes a
9813 introduced in version 20080701. If the object being evaluated (via
9815 command) is not a method, the debugger can hang while trying to obtain
9817 existent parameters.
9819 iASL: relax error for using reserved "_T_x" identifiers. These names can
9820 appear in a disassembled ASL file if they were emitted by the original
9821 compiler. Instead of issuing an error or warning and forcing the user to
9822 manually change these names, issue a remark instead.
9824 iASL: error if named object created in while loop. Emit an error if any
9826 object is created within a While loop. If allowed, this code will
9829 run-time error on the second iteration of the loop when an attempt is
9832 create the same named object twice. ACPICA bugzilla 730.
9834 iASL: Support absolute pathnames for include files. Add support for
9836 pathnames within the Include operator. previously, only relative
9840 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
9842 The ACPI spec requires one interrupt minimum. BZ 423
9844 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
9845 Handles the case for the Interrupt Resource Descriptor where
9846 the ResourceSource argument is omitted but ResourceSourceIndex
9847 is present. Now leave room for the Index. BZ 426
9849 iASL: Prevent error message if CondRefOf target does not exist. Fixes
9851 where an error message is emitted if the target does not exist. BZ 516
9853 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
9854 (get ACPI tables on Windows). This was apparently broken in version
9857 AcpiXtract: Handle EOF while extracting data. Correctly handle the case
9859 the EOF happens immediately after the last table in the input file. Print
9860 completion message. Previously, no message was displayed in this case.
9862 ----------------------------------------
9863 01 July 2008. Summary of changes for version 20080701:
9865 0) Git source tree / acpica.org
9867 Fixed a problem where a git-clone from http would not transfer the entire
9870 1) ACPI CA Core Subsystem:
9872 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
9873 enable bit. Now performs a read-change-write of the enable register
9875 of simply writing out the cached enable mask. This will prevent
9877 enabling of GPEs if a rogue GPE is received during initialization (before
9879 handlers are installed.)
9881 Implemented a copy for dynamically loaded tables. Previously, dynamically
9882 loaded tables were simply mapped - but on some machines this memory is
9883 corrupted after suspend. Now copy the table to a local buffer. For the
9884 OpRegion case, added checksum verify. Use the table length from the table
9885 header, not the region length. For the Buffer case, use the table length
9886 also. Dennis Noordsij, Bob Moore. BZ 10734
9888 Fixed a problem where the same ACPI table could not be dynamically loaded
9890 unloaded more than once. Without this change, a table cannot be loaded
9892 once it has been loaded/unloaded one time. The current mechanism does not
9893 unregister a table upon an unload. During a load, if the same table is
9895 this no longer returns an exception. BZ 722
9897 Fixed a problem where the wrong descriptor length was calculated for the
9898 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
9900 are calculated as 12 bytes long, but the actual length in the internal
9901 descriptor is 16 because of the round-up to 8 on the 64-bit build.
9903 by Linn Crosetto. BZ 728
9905 Fixed a possible memory leak in the Unload operator. The DdbHandle
9907 by Load() did not have its reference count decremented during unload,
9909 to a memory leak. Lin Ming. BZ 727
9911 Fixed a possible memory leak when deleting thermal/processor objects. Any
9912 associated notify handlers (and objects) were not being deleted. Fiodor
9915 Fixed the ordering of the ASCII names in the global mutex table to match
9917 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
9919 Vegard Nossum. BZ 726
9921 Enhanced the AcpiGetObjectInfo interface to return the number of required
9922 arguments if the object is a control method. Added this call to the
9924 so the proper number of default arguments are passed to a method. This
9925 prevents a warning when executing methods from AcpiExec.
9927 Added a check for an invalid handle in AcpiGetObjectInfo. Return
9928 AE_BAD_PARAMETER if input handle is invalid. BZ 474
9930 Fixed an extraneous warning from exconfig.c on the 64-bit build.
9932 Example Code and Data Size: These are the sizes for the OS-independent
9933 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9934 debug version of the code includes the debug output trace mechanism and
9936 much larger code and data size.
9939 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
9940 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
9942 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
9943 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
9945 2) iASL Compiler/Disassembler and Tools:
9947 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
9948 resource descriptor names.
9950 iASL: Detect invalid ASCII characters in input (windows version). Removed
9952 "-CF" flag from the flex compile, enables correct detection of non-ASCII
9953 characters in the input. BZ 441
9955 iASL: Eliminate warning when result of LoadTable is not used. Eliminate
9957 "result of operation not used" warning when the DDB handle returned from
9958 LoadTable is not used. The warning is not needed. BZ 590
9960 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
9963 pass address of table to the AML. Added option to disable OpRegion
9965 to allow creation of an OpRegion with a real address that was passed to
9967 All of this allows testing of the Load and Unload operators from
9970 Debugger: update tables command for unloaded tables. Handle unloaded
9972 and use the standard table header output routine.
9974 ----------------------------------------
9975 09 June 2008. Summary of changes for version 20080609:
9977 1) ACPI CA Core Subsystem:
9979 Implemented a workaround for reversed _PRT entries. A significant number
9981 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
9982 change dynamically detects and repairs this problem. Provides
9984 with MS ACPI. BZ 6859
9986 Simplified the internal ACPI hardware interfaces to eliminate the locking
9987 flag parameter from Register Read/Write. Added a new external interface,
9988 AcpiGetRegisterUnlocked.
9990 Fixed a problem where the invocation of a GPE control method could hang.
9992 was a regression introduced in 20080514. The new method argument count
9993 validation mechanism can enter an infinite loop when a GPE method is
9994 dispatched. Problem fixed by removing the obsolete code that passed GPE
9996 information to the notify handler via the control method parameter
9999 Fixed a problem where the _SST execution status was incorrectly returned
10001 the caller of AcpiEnterSleepStatePrep. This was a regression introduced
10003 20080514. _SST is optional and a NOT_FOUND exception should never be
10006 Fixed a problem where a deleted object could be accessed from within the
10008 parser. This was a regression introduced in version 20080123 as a fix for
10010 Unload operator. Lin Ming. BZ 10669
10012 Cleaned up the debug operand dump mechanism. Eliminated unnecessary
10014 and eliminated the use of a negative index in a loop. Operands are now
10015 displayed in the correct order, not backwards. This also fixes a
10017 introduced in 20080514 on 64-bit systems where the elimination of
10018 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
10021 Fixed a possible memory leak in EvPciConfigRegionSetup where the error
10023 path did not delete a locally allocated structure.
10025 Updated definitions for the DMAR and SRAT tables to synchronize with the
10026 current specifications. Includes disassembler support.
10028 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
10029 loop termination value was used. Loop terminated on iteration early,
10031 one mutex. Linn Crosetto
10033 Example Code and Data Size: These are the sizes for the OS-independent
10034 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10035 debug version of the code includes the debug output trace mechanism and
10037 much larger code and data size.
10040 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
10041 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
10043 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
10044 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
10046 2) iASL Compiler/Disassembler and Tools:
10048 Disassembler: Implemented support for EisaId() within _CID objects. Now
10049 disassemble integer _CID objects back to EisaId invocations, including
10050 multiple integers within _CID packages. Includes single-step support for
10053 Disassembler: Added support for DMAR and SRAT table definition changes.
10055 ----------------------------------------
10056 14 May 2008. Summary of changes for version 20080514:
10058 1) ACPI CA Core Subsystem:
10060 Fixed a problem where GPEs were enabled too early during the ACPICA
10061 initialization. This could lead to "handler not installed" errors on some
10062 machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
10064 ensures that all operation regions and devices throughout the namespace
10066 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
10068 Implemented a change to the enter sleep code. Moved execution of the _GTS
10069 method to just before setting sleep enable bit. The execution was moved
10071 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
10072 immediately before the SLP_EN bit is set, as per the ACPI specification.
10073 Luming Yu, BZ 1653.
10075 Implemented a fix to disable unknown GPEs (2nd version). Now always
10077 the GPE, even if ACPICA thinks that that it is already disabled. It is
10078 possible that the AML or some other code has enabled the GPE unbeknownst
10082 Fixed a problem with the Field operator where zero-length fields would
10084 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
10086 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
10088 Implemented a fix for the Load operator, now load the table at the
10090 root. This reverts a change introduced in version 20071019. The table is
10092 loaded at the namespace root even though this goes against the ACPI
10093 specification. This provides compatibility with other ACPI
10095 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
10098 Fixed a problem where ACPICA would not Load() tables with unusual
10100 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
10101 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
10102 Therefore, signature validation is worthless. Apparently MS ACPI accepts
10104 signatures, ACPICA must be compatible. BZ 10454.
10106 Fixed a possible negative array index in AcpiUtValidateException. Added
10108 fields to the exception string arrays to eliminate a -1 subtraction on
10112 Updated the debug tracking macros to reduce overall code and data size.
10113 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
10114 instead of pointers to static strings. Jan Beulich and Bob Moore.
10116 Implemented argument count checking in control method invocation via
10117 AcpiEvaluateObject. Now emit an error if too few arguments, warning if
10119 many. This applies only to extern programmatic control method execution,
10121 method-to-method calls within the AML. Lin Ming.
10123 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
10125 longer needed, especially with the removal of 16-bit support. It was
10127 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
10130 32/64-bit platforms is required.
10132 Added the C const qualifier for appropriate string constants -- mostly
10133 MODULE_NAME and printf format strings. Jan Beulich.
10135 Example Code and Data Size: These are the sizes for the OS-independent
10136 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10137 debug version of the code includes the debug output trace mechanism and
10139 much larger code and data size.
10142 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
10143 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
10145 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
10146 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
10148 2) iASL Compiler/Disassembler and Tools:
10150 Implemented ACPI table revision ID validation in the disassembler. Zero
10152 always invalid. For DSDTs, the ID controls the interpreter integer width.
10154 means 32-bit and this is unusual. 2 or greater is 64-bit.
10156 ----------------------------------------
10157 21 March 2008. Summary of changes for version 20080321:
10159 1) ACPI CA Core Subsystem:
10161 Implemented an additional change to the GPE support in order to suppress
10162 spurious or stray GPEs. The AcpiEvDisableGpe function will now
10164 disable incoming GPEs that are neither enabled nor disabled -- meaning
10166 the GPE is unknown to the system. This should prevent future interrupt
10168 from that GPE. BZ 6217 (Zhang Rui)
10170 Fixed a problem where NULL package elements were not returned to the
10171 AcpiEvaluateObject interface correctly. The element was simply ignored
10172 instead of returning a NULL ACPI_OBJECT package element, potentially
10174 a buffer overflow and/or confusing the caller who expected a fixed number
10176 elements. BZ 10132 (Lin Ming, Bob Moore)
10178 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
10180 Qword), Field, BankField, and IndexField operators when invoked from
10182 an executing control method. In this case, these operators created
10184 nodes that were incorrectly left marked as permanent nodes instead of
10185 temporary nodes. This could cause a problem if there is race condition
10186 between an exiting control method and a running namespace walk. (Reported
10190 Fixed a problem where the CreateField and CreateXXXField operators would
10191 incorrectly allow duplicate names (the name of the field) with no
10195 Implemented several changes for Notify handling. Added support for new
10197 values (ACPI 2.0+) and improved the Notify debug output. Notify on
10198 PowerResource objects is no longer allowed, as per the ACPI
10200 (Bob Moore, Zhang Rui)
10202 All Reference Objects returned via the AcpiEvaluateObject interface are
10204 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
10206 NULL objects - either NULL package elements or unresolved named
10209 Fixed a problem where an extraneous debug message was produced for
10211 objects (when debugging enabled). The message "Package List length larger
10212 than NumElements count" is now produced in the correct case, and is now
10214 error message rather than a debug message. Added a debug message for the
10215 opposite case, where NumElements is larger than the Package List (the
10217 will be padded out with NULL elements as per the ACPI spec.)
10219 Implemented several improvements for the output of the ASL "Debug" object
10221 clarify and keep all data for a given object on one output line.
10223 Fixed two size calculation issues with the variable-length Start
10225 resource descriptor.
10227 Example Code and Data Size: These are the sizes for the OS-independent
10228 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10229 debug version of the code includes the debug output trace mechanism and
10231 a much larger code and data size.
10234 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
10235 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
10237 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
10238 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
10240 2) iASL Compiler/Disassembler and Tools:
10242 Fixed a problem with the use of the Switch operator where execution of
10244 containing method by multiple concurrent threads could cause an
10245 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
10246 actual Switch opcode, it must be simulated with local named temporary
10247 variables and if/else pairs. The solution chosen was to mark any method
10249 uses Switch as Serialized, thus preventing multiple thread entries. BZ
10252 ----------------------------------------
10253 13 February 2008. Summary of changes for version 20080213:
10255 1) ACPI CA Core Subsystem:
10257 Implemented another MS compatibility design change for GPE/Notify
10259 GPEs are now cleared/enabled asynchronously to allow all pending notifies
10261 complete first. It is expected that the OSL will queue the enable request
10262 behind all pending notify requests (may require changes to the local host
10264 in AcpiOsExecute). Alexey Starikovskiy.
10266 Fixed a problem where buffer and package objects passed as arguments to a
10267 control method via the external AcpiEvaluateObject interface could cause
10269 AE_AML_INTERNAL exception depending on the order and type of operators
10270 executed by the target control method.
10272 Fixed a problem where resource descriptor size optimization could cause a
10273 problem when a _CRS resource template is passed to a _SRS method. The
10275 resource template must use the same descriptors (with the same size) as
10276 returned from _CRS. This change affects the following resource
10278 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
10281 Fixed a problem where a CopyObject to RegionField, BankField, and
10283 objects did not perform an implicit conversion as it should. These types
10285 retain their initial type permanently as per the ACPI specification.
10287 a CopyObject to all other object types should not perform an implicit
10288 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
10290 Fixed a problem with the AcpiGetDevices interface where the mechanism to
10291 match device CIDs did not examine the entire list of available CIDs, but
10292 instead aborted on the first non-matching CID. Andrew Patterson.
10294 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
10296 inadvertently changed to return a 16-bit value instead of a 32-bit value,
10297 truncating the upper dword of a 64-bit value. This macro is only used to
10298 display debug output, so no incorrect calculations were made. Also,
10299 reimplemented the macro so that a 64-bit shift is not performed by
10300 inefficient compilers.
10302 Added missing va_end statements that should correspond with each va_start
10305 Example Code and Data Size: These are the sizes for the OS-independent
10306 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10307 debug version of the code includes the debug output trace mechanism and
10309 a much larger code and data size.
10312 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
10313 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
10315 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
10316 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
10318 2) iASL Compiler/Disassembler and Tools:
10320 Implemented full disassembler support for the following new ACPI tables:
10321 BERT, EINJ, and ERST. Implemented partial disassembler support for the
10322 complicated HEST table. These tables support the Windows Hardware Error
10323 Architecture (WHEA).
10325 ----------------------------------------
10326 23 January 2008. Summary of changes for version 20080123:
10328 1) ACPI CA Core Subsystem:
10330 Added the 2008 copyright to all module headers and signons. This affects
10331 virtually every file in the ACPICA core subsystem, the iASL compiler, and
10332 the tools/utilities.
10334 Fixed a problem with the SizeOf operator when used with Package and
10336 objects. These objects have deferred execution for some arguments, and
10338 execution is now completed before the SizeOf is executed. This problem
10340 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
10344 Implemented an enhancement to the interpreter "slack mode". In the
10347 an explicit return or an implicitly returned object from the last
10349 opcode, a control method will now implicitly return an integer of value 0
10351 Microsoft compatibility. (Lin Ming) BZ 392
10353 Fixed a problem with the Load operator where an exception was not
10356 the case where the table is already loaded. (Lin Ming) BZ 463
10358 Implemented support for the use of DDBHandles as an Indexed Reference, as
10360 the ACPI spec. (Lin Ming) BZ 486
10362 Implemented support for UserTerm (Method invocation) for the Unload
10364 as per the ACPI spec. (Lin Ming) BZ 580
10366 Fixed a problem with the LoadTable operator where the OemId and
10368 input strings could cause unexpected failures if they were shorter than
10370 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
10372 Implemented support for UserTerm (Method invocation) for the Unload
10374 as per the ACPI spec. (Lin Ming) BZ 580
10376 Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
10378 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
10380 Example Code and Data Size: These are the sizes for the OS-independent
10381 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10382 debug version of the code includes the debug output trace mechanism and
10384 a much larger code and data size.
10387 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
10388 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
10390 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
10391 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
10393 2) iASL Compiler/Disassembler and Tools:
10395 Implemented support in the disassembler for checksum validation on
10397 binary DSDTs and SSDTs. If incorrect, a message is displayed within the
10399 header dump at the start of the disassembly.
10401 Implemented additional debugging information in the namespace listing
10403 created during compilation. In addition to the namespace hierarchy, the
10405 pathname to each namespace object is displayed.
10407 Fixed a problem with the disassembler where invalid ACPI tables could
10409 faults or infinite loops.
10411 Fixed an unexpected parse error when using the optional "parameter types"
10412 list in a control method declaration. (Lin Ming) BZ 397
10414 Fixed a problem where two External declarations with the same name did
10416 cause an error (Lin Ming) BZ 509
10418 Implemented support for full TermArgs (adding Argx, Localx and method
10419 invocation) for the ParameterData parameter to the LoadTable operator.
10423 ----------------------------------------
10424 19 December 2007. Summary of changes for version 20071219:
10426 1) ACPI CA Core Subsystem:
10428 Implemented full support for deferred execution for the TermArg string
10429 arguments for DataTableRegion. This enables forward references and full
10430 operand resolution for the three string arguments. Similar to
10432 deferred argument execution.) Lin Ming. BZ 430
10434 Implemented full argument resolution support for the BankValue argument
10436 BankField. Previously, only constants were supported, now any TermArg may
10438 used. Lin Ming BZ 387, 393
10440 Fixed a problem with AcpiGetDevices where the search of a branch of the
10441 device tree could be terminated prematurely. In accordance with the ACPI
10442 specification, the search down the current branch is terminated if a
10444 is both not present and not functional (instead of just not present.)
10448 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
10450 the underlying AML code changed the GPE enable registers. Now, any
10452 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
10454 instead of simply ignored. Rui Zhang.
10456 Fixed a problem with Index Fields where the Index register was
10458 limited to a maximum of 32 bits. Now any size may be used.
10460 Fixed a couple memory leaks associated with "implicit return" objects
10462 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
10464 Example Code and Data Size: These are the sizes for the OS-independent
10465 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10466 debug version of the code includes the debug output trace mechanism and
10468 a much larger code and data size.
10471 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
10472 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
10474 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
10475 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
10477 ----------------------------------------
10478 14 November 2007. Summary of changes for version 20071114:
10480 1) ACPI CA Core Subsystem:
10482 Implemented event counters for each of the Fixed Events, the ACPI SCI
10483 (interrupt) itself, and control methods executed. Named
10484 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
10486 should be useful for debugging and statistics.
10488 Implemented a new external interface, AcpiGetStatistics, to retrieve the
10489 contents of the various event counters. Returns the current values for
10490 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
10491 AcpiMethodCount. The interface can be expanded in the future if new
10493 are added. Device drivers should use this interface rather than access
10497 Fixed a problem with the FromBCD and ToBCD operators. With some
10499 the ShortDivide function worked incorrectly, causing problems with the
10501 functions with large input values. A truncation from 64-bit to 32-bit
10502 inadvertently occurred. Internal BZ 435. Lin Ming
10504 Fixed a problem with Index references passed as method arguments.
10506 passed as arguments to control methods were dereferenced immediately
10508 control was passed to the called method). The references are now
10510 passed directly to the called method. BZ 5389. Lin Ming
10512 Fixed a problem with CopyObject used in conjunction with the Index
10514 The reference was incorrectly dereferenced before the copy. The reference
10516 now correctly copied. BZ 5391. Lin Ming
10518 Fixed a problem with Control Method references within Package objects.
10520 references are now correctly generated. This completes the package
10521 construction overhaul that began in version 20071019.
10523 Example Code and Data Size: These are the sizes for the OS-independent
10524 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10525 debug version of the code includes the debug output trace mechanism and
10527 a much larger code and data size.
10530 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
10531 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
10533 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
10534 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
10537 2) iASL Compiler/Disassembler and Tools:
10539 The AcpiExec utility now installs handlers for all of the predefined
10540 Operation Region types. New types supported are: PCI_Config, CMOS, and
10543 Fixed a problem with the 64-bit version of AcpiExec where the extended
10545 bit) address fields for the DSDT and FACS within the FADT were not being
10546 used, causing truncation of the upper 32-bits of these addresses. Lin
10550 ----------------------------------------
10551 19 October 2007. Summary of changes for version 20071019:
10553 1) ACPI CA Core Subsystem:
10555 Fixed a problem with the Alias operator when the target of the alias is a
10556 named ASL operator that opens a new scope -- Scope, Device,
10558 Processor, and ThermalZone. In these cases, any children of the original
10559 operator could not be accessed via the alias, potentially causing
10561 AE_NOT_FOUND exceptions. (BZ 9067)
10563 Fixed a problem with the Package operator where all named references were
10564 created as object references and left otherwise unresolved. According to
10566 ACPI specification, a Package can only contain Data Objects or references
10568 control methods. The implication is that named references to Data Objects
10569 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
10570 immediately upon package creation. This is the approach taken with this
10571 change. References to all other named objects (Methods, Devices, Scopes,
10572 etc.) are all now properly created as reference objects. (BZ 5328)
10574 Reverted a change to Notify handling that was introduced in version
10575 20070508. This version changed the Notify handling from asynchronous to
10576 fully synchronous (Device driver Notify handling with respect to the
10578 ASL operator). It was found that this change caused more problems than it
10579 solved and was removed by most users.
10581 Fixed a problem with the Increment and Decrement operators where the type
10583 the target object could be unexpectedly and incorrectly changed. (BZ 353)
10586 Fixed a problem with the Load and LoadTable operators where the table
10587 location within the namespace was ignored. Instead, the table was always
10588 loaded into the root or current scope. Lin Ming.
10590 Fixed a problem with the Load operator when loading a table from a buffer
10591 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
10593 Fixed a problem with the Debug object where a store of a DdbHandle
10595 object to the Debug object could cause a fault.
10597 Added a table checksum verification for the Load operator, in the case
10599 the load is from a buffer. (BZ 578).
10601 Implemented additional parameter validation for the LoadTable operator.
10603 length of the input strings SignatureString, OemIdString, and OemTableId
10605 now checked for maximum lengths. (BZ 582) Lin Ming.
10607 Example Code and Data Size: These are the sizes for the OS-independent
10608 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10609 debug version of the code includes the debug output trace mechanism and
10611 a much larger code and data size.
10614 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
10615 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
10617 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
10618 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
10621 2) iASL Compiler/Disassembler:
10623 Fixed a problem where if a single file was specified and the file did not
10624 exist, no error message was emitted. (Introduced with wildcard support in
10627 ----------------------------------------
10628 19 September 2007. Summary of changes for version 20070919:
10630 1) ACPI CA Core Subsystem:
10632 Designed and implemented new external interfaces to install and remove
10633 handlers for ACPI table-related events. Current events that are defined
10635 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
10636 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
10637 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
10639 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
10640 (acpi_serialized option on Linux) could cause some systems to hang during
10641 initialization. (Bob Moore) BZ 8171
10643 Fixed a problem where objects of certain types (Device, ThermalZone,
10644 Processor, PowerResource) can be not found if they are declared and
10645 referenced from within the same control method (Lin Ming) BZ 341
10647 Example Code and Data Size: These are the sizes for the OS-independent
10648 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10649 debug version of the code includes the debug output trace mechanism and
10651 a much larger code and data size.
10654 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
10655 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
10657 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
10658 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
10661 2) iASL Compiler/Disassembler:
10663 Implemented support to allow multiple files to be compiled/disassembled
10666 single invocation. This includes command line wildcard support for both
10668 Windows and Unix versions of the compiler. This feature simplifies the
10669 disassembly and compilation of multiple ACPI tables in a single
10672 ----------------------------------------
10673 08 May 2007. Summary of changes for version 20070508:
10675 1) ACPI CA Core Subsystem:
10677 Implemented a Microsoft compatibility design change for the handling of
10679 Notify AML operator. Previously, notify handlers were dispatched and
10680 executed completely asynchronously in a deferred thread. The new design
10681 still executes the notify handlers in a different thread, but the
10683 thread that executed the Notify() now waits at a synchronization point
10685 the notify handler to complete. Some machines depend on a synchronous
10687 operator in order to operate correctly.
10689 Implemented support to allow Package objects to be passed as method
10690 arguments to the external AcpiEvaluateObject interface. Previously, this
10691 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
10692 implemented since there were no reserved control methods that required it
10695 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
10697 contained invalid non-zero values in reserved fields could cause later
10698 failures because these fields have meaning in later revisions of the
10700 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
10702 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
10704 Fixed a problem where the Global Lock handle was not properly updated if
10706 thread that acquired the Global Lock via executing AML code then
10708 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
10712 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
10713 could be corrupted if the interrupt being removed was at the head of the
10714 list. Reported by Linn Crosetto.
10716 Example Code and Data Size: These are the sizes for the OS-independent
10717 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10718 debug version of the code includes the debug output trace mechanism and
10720 a much larger code and data size.
10723 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10724 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
10726 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
10727 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
10729 ----------------------------------------
10730 20 March 2007. Summary of changes for version 20070320:
10732 1) ACPI CA Core Subsystem:
10734 Implemented a change to the order of interpretation and evaluation of AML
10735 operand objects within the AML interpreter. The interpreter now evaluates
10736 operands in the order that they appear in the AML stream (and the
10737 corresponding ASL code), instead of in the reverse order (after the
10739 operand list has been parsed). The previous behavior caused several
10741 incompatibilities with the Microsoft AML interpreter as well as being
10742 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
10744 Implemented a change to the ACPI Global Lock support. All interfaces to
10746 global lock now allow the same thread to acquire the lock multiple times.
10747 This affects the AcpiAcquireGlobalLock external interface to the global
10749 as well as the internal use of the global lock to support AML fields -- a
10750 control method that is holding the global lock can now simultaneously
10752 AML fields that require global lock protection. Previously, in both
10754 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
10756 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
10757 Controller. There is no change to the behavior of the AML Acquire
10759 as this can already be used to acquire a mutex multiple times by the same
10760 thread. BZ 8066. With assistance from Alexey Starikovskiy.
10762 Fixed a problem where invalid objects could be referenced in the AML
10763 Interpreter after error conditions. During operand evaluation, ensure
10765 the internal "Return Object" field is cleared on error and only valid
10766 pointers are stored there. Caused occasional access to deleted objects
10768 resulted in "large reference count" warning messages. Valery Podrezov.
10770 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
10772 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
10775 Fixed an internal problem with the handling of result objects on the
10776 interpreter result stack. BZ 7872. Valery Podrezov.
10778 Removed obsolete code that handled the case where AML_NAME_OP is the
10780 of a reference (Reference.Opcode). This code was no longer necessary. BZ
10781 7874. Valery Podrezov.
10783 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
10786 remnant from the previously discontinued 16-bit support.
10788 Example Code and Data Size: These are the sizes for the OS-independent
10789 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10790 debug version of the code includes the debug output trace mechanism and
10792 a much larger code and data size.
10795 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10796 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10798 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10799 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
10801 ----------------------------------------
10802 26 January 2007. Summary of changes for version 20070126:
10804 1) ACPI CA Core Subsystem:
10806 Added the 2007 copyright to all module headers and signons. This affects
10807 virtually every file in the ACPICA core subsystem, the iASL compiler, and
10810 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
10811 during a table load. A bad pointer was passed in the case where the DSDT
10813 overridden, causing a fault in this case.
10815 Example Code and Data Size: These are the sizes for the OS-independent
10816 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10817 debug version of the code includes the debug output trace mechanism and
10819 a much larger code and data size.
10822 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10823 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10825 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10826 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10828 ----------------------------------------
10829 15 December 2006. Summary of changes for version 20061215:
10831 1) ACPI CA Core Subsystem:
10833 Support for 16-bit ACPICA has been completely removed since it is no
10835 necessary and it clutters the code. All 16-bit macros, types, and
10836 conditional compiles have been removed, cleaning up and simplifying the
10838 across the entire subsystem. DOS support is no longer needed since the
10839 bootable Linux firmware kit is now available.
10841 The handler for the Global Lock is now removed during AcpiTerminate to
10842 enable a clean subsystem restart, via the implementation of the
10843 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
10846 Implemented enhancements to the multithreading support within the
10848 to enable improved multithreading debugging and evaluation of the
10852 Debugger: Enhanced the Statistics/Memory command to emit the total
10854 memory used during the execution, as well as the maximum memory consumed
10856 each of the various object types. (Valery Podrezov)
10858 Example Code and Data Size: These are the sizes for the OS-independent
10859 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10860 debug version of the code includes the debug output trace mechanism and
10862 a much larger code and data size.
10865 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
10866 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
10868 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10869 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10872 2) iASL Compiler/Disassembler and Tools:
10874 AcpiExec: Implemented a new option (-m) to display full memory use
10875 statistics upon subsystem/program termination. (Valery Podrezov)
10877 ----------------------------------------
10878 09 November 2006. Summary of changes for version 20061109:
10880 1) ACPI CA Core Subsystem:
10882 Optimized the Load ASL operator in the case where the source operand is
10884 operation region. Simply map the operation region memory, instead of
10885 performing a bytewise read. (Region must be of type SystemMemory, see
10888 Fixed the Load ASL operator for the case where the source operand is a
10889 region field. A buffer object is also allowed as the source operand. BZ
10892 Fixed a problem where the Load ASL operator allowed the source operand to
10894 an operation region of any type. It is now restricted to regions of type
10895 SystemMemory, as per the ACPI specification. BZ 481
10897 Additional cleanup and optimizations for the new Table Manager code.
10899 AcpiEnable will now fail if all of the required ACPI tables are not
10901 (FADT, FACS, DSDT). BZ 477
10903 Added #pragma pack(8/4) to acobject.h to ensure that the structures in
10905 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
10906 manually optimized to be aligned and will not work if it is byte-packed.
10908 Example Code and Data Size: These are the sizes for the OS-independent
10909 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10910 debug version of the code includes the debug output trace mechanism and
10912 a much larger code and data size.
10915 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
10916 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
10918 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
10919 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
10922 2) iASL Compiler/Disassembler and Tools:
10924 Fixed a problem where the presence of the _OSI predefined control method
10925 within complex expressions could cause an internal compiler error.
10927 AcpiExec: Implemented full region support for multiple address spaces.
10928 SpaceId is now part of the REGION object. BZ 429
10930 ----------------------------------------
10931 11 October 2006. Summary of changes for version 20061011:
10933 1) ACPI CA Core Subsystem:
10935 Completed an AML interpreter performance enhancement for control method
10936 execution. Previously a 2-pass parse/execution, control methods are now
10937 completely parsed and executed in a single pass. This improves overall
10938 interpreter performance by ~25%, reduces code size, and reduces CPU stack
10939 use. (Valery Podrezov + interpreter changes in version 20051202 that
10940 eliminated namespace loading during the pass one parse.)
10942 Implemented _CID support for PCI Root Bridge detection. If the _HID does
10944 match the predefined PCI Root Bridge IDs, the _CID list (if present) is
10946 obtained and also checked for an ID match.
10948 Implemented additional support for the PCI _ADR execution: upsearch until
10950 device scope is found before executing _ADR. This allows PCI_Config
10951 operation regions to be declared locally within control methods
10953 PCI device objects.
10955 Fixed a problem with a possible race condition between threads executing
10956 AcpiWalkNamespace and the AML interpreter. This condition was removed by
10957 modifying AcpiWalkNamespace to (by default) ignore all temporary
10959 entries created during any concurrent control method execution. An
10960 additional namespace race condition is known to exist between
10961 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
10964 Restructured the AML ParseLoop function, breaking it into several
10965 subfunctions in order to reduce CPU stack use and improve
10969 AcpiGetHandle: Fix for parameter validation to detect invalid
10971 of prefix handle and pathname. BZ 478
10973 Example Code and Data Size: These are the sizes for the OS-independent
10974 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10975 debug version of the code includes the debug output trace mechanism and
10977 a much larger code and data size.
10980 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10981 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
10983 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
10984 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
10986 2) iASL Compiler/Disassembler and Tools:
10988 Ported the -g option (get local ACPI tables) to the new ACPICA Table
10990 to restore original behavior.
10992 ----------------------------------------
10993 27 September 2006. Summary of changes for version 20060927:
10995 1) ACPI CA Core Subsystem:
10997 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
10998 These functions now use a spinlock for mutual exclusion and the interrupt
10999 level indication flag is not needed.
11001 Fixed a problem with the Global Lock where the lock could appear to be
11002 obtained before it is actually obtained. The global lock semaphore was
11003 inadvertently created with one unit instead of zero units. (BZ 464)
11007 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
11009 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
11011 Example Code and Data Size: These are the sizes for the OS-independent
11012 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11013 debug version of the code includes the debug output trace mechanism and
11015 a much larger code and data size.
11018 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
11019 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
11021 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
11022 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
11025 2) iASL Compiler/Disassembler and Tools:
11027 Fixed a compilation problem with the pre-defined Resource Descriptor
11029 names where an "object does not exist" error could be incorrectly
11031 if the parent ResourceTemplate pathname places the template within a
11032 different namespace scope than the current scope. (BZ 7212)
11034 Fixed a problem where the compiler could hang after syntax errors
11036 in an ElseIf construct. (BZ 453)
11038 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
11039 operator. An incorrect output filename was produced when this parameter
11041 a null string (""). Now, the original input filename is used as the AML
11042 output filename, with an ".aml" extension.
11044 Implemented a generic batch command mode for the AcpiExec utility
11046 any AML debugger command) (Valery Podrezov).
11048 ----------------------------------------
11049 12 September 2006. Summary of changes for version 20060912:
11051 1) ACPI CA Core Subsystem:
11053 Enhanced the implementation of the "serialized mode" of the interpreter
11054 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
11055 specified, instead of creating a serialization semaphore per control
11057 the interpreter lock is simply no longer released before a blocking
11058 operation during control method execution. This effectively makes the AML
11059 Interpreter single-threaded. The overhead of a semaphore per-method is
11062 Fixed a regression where an error was no longer emitted if a control
11064 attempts to create 2 objects of the same name. This once again returns
11065 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
11067 will dynamically serialize the control method to possible prevent future
11070 Integrated a fix for a problem with PCI Express HID detection in the PCI
11071 Config Space setup procedure. (BZ 7145)
11073 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
11074 AcpiHwInitialize function - the FADT registers are now validated when the
11077 Added two new warnings during FADT verification - 1) if the FADT is
11079 than the largest known FADT version, and 2) if there is a mismatch
11082 32-bit block address and the 64-bit X counterpart (when both are non-
11085 Example Code and Data Size: These are the sizes for the OS-independent
11086 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11087 debug version of the code includes the debug output trace mechanism and
11089 a much larger code and data size.
11092 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
11093 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
11095 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
11096 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
11099 2) iASL Compiler/Disassembler and Tools:
11101 Fixed a problem with the implementation of the Switch() operator where
11103 temporary variable was declared too close to the actual Switch, instead
11105 at method level. This could cause a problem if the Switch() operator is
11106 within a while loop, causing an error on the second iteration. (BZ 460)
11108 Disassembler - fix for error emitted for unknown type for target of scope
11109 operator. Now, ignore it and continue.
11111 Disassembly of an FADT now verifies the input FADT and reports any errors
11112 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
11114 Disassembly of raw data buffers with byte initialization data now
11116 each output line with the current buffer offset.
11118 Disassembly of ASF! table now includes all variable-length data fields at
11119 the end of some of the subtables.
11121 The disassembler now emits a comment if a buffer appears to be a
11122 ResourceTemplate, but cannot be disassembled as such because the EndTag
11124 not appear at the very end of the buffer.
11126 AcpiExec - Added the "-t" command line option to enable the serialized
11128 of the AML interpreter.
11130 ----------------------------------------
11131 31 August 2006. Summary of changes for version 20060831:
11133 1) ACPI CA Core Subsystem:
11135 Miscellaneous fixes for the Table Manager:
11136 - Correctly initialize internal common FADT for all 64-bit "X" fields
11137 - Fixed a couple table mapping issues during table load
11138 - Fixed a couple alignment issues for IA64
11139 - Initialize input array to zero in AcpiInitializeTables
11140 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
11141 AcpiGetTableByIndex
11143 Change for GPE support: when a "wake" GPE is received, all wake GPEs are
11145 immediately disabled to prevent the waking GPE from firing again and to
11146 prevent other wake GPEs from interrupting the wake process.
11148 Added the AcpiGpeCount global that tracks the number of processed GPEs,
11150 be used for debugging systems with a large number of ACPI interrupts.
11152 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
11153 both the ACPICA headers and the disassembler.
11155 Example Code and Data Size: These are the sizes for the OS-independent
11156 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11157 debug version of the code includes the debug output trace mechanism and
11159 a much larger code and data size.
11162 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
11163 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
11165 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
11166 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
11169 2) iASL Compiler/Disassembler and Tools:
11171 Disassembler support for the DMAR ACPI table.
11173 ----------------------------------------
11174 23 August 2006. Summary of changes for version 20060823:
11176 1) ACPI CA Core Subsystem:
11178 The Table Manager component has been completely redesigned and
11179 reimplemented. The new design is much simpler, and reduces the overall
11181 and data size of the kernel-resident ACPICA by approximately 5%. Also, it
11183 now possible to obtain the ACPI tables very early during kernel
11184 initialization, even before dynamic memory management is initialized.
11185 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
11187 Obsolete ACPICA interfaces:
11189 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
11192 - AcpiLoadTable: Not needed.
11193 - AcpiUnloadTable: Not needed.
11195 New ACPICA interfaces:
11197 - AcpiInitializeTables: Must be called before the table manager can be
11199 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
11200 allocated memory after it becomes available.
11201 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
11205 Other ACPICA changes:
11207 - AcpiGetTableHeader returns the actual mapped table header, not a copy.
11209 AcpiOsUnmapMemory to free this mapping.
11210 - AcpiGetTable returns the actual mapped table. The mapping is managed
11211 internally and must not be deleted by the caller. Use of this interface
11212 causes no additional dynamic memory allocation.
11213 - AcpiFindRootPointer: Support for physical addressing has been
11215 it appeared to be unused.
11216 - The interface to AcpiOsMapMemory has changed to be consistent with the
11217 other allocation interfaces.
11218 - The interface to AcpiOsGetRootPointer has changed to eliminate
11221 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
11223 bit platforms. Was previously 64 bits on all platforms.
11224 - The interface to the ACPI Global Lock acquire/release macros have
11226 slightly since ACPICA no longer keeps a local copy of the FACS with a
11227 constructed pointer to the actual global lock.
11229 Porting to the new table manager:
11231 - AcpiInitializeTables: Must be called once, and can be called anytime
11232 during the OS initialization process. It allows the host to specify an
11234 of memory to be used to store the internal version of the RSDT/XSDT (root
11235 table). This allows the host to access ACPI tables before memory
11237 is initialized and running.
11238 - AcpiReallocateRootTable: Can be called after memory management is
11240 to copy the root table to a dynamically allocated array, freeing up the
11241 scratch memory specified in the call to AcpiInitializeTables.
11242 - AcpiSubsystemInitialize: This existing interface is independent of the
11243 Table Manager, and does not have to be called before the Table Manager
11245 be used, it only must be called before the rest of ACPICA can be used.
11246 - ACPI Tables: Some changes have been made to the names and structure of
11248 actbl.h and actbl1.h header files and may require changes to existing
11250 For example, bitfields have been completely removed because of their lack
11252 portability across C compilers.
11253 - Update interfaces to the Global Lock acquire/release macros if local
11254 versions are used. (see acwin.h)
11256 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
11258 New files: tbfind.c
11260 Example Code and Data Size: These are the sizes for the OS-independent
11261 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11262 debug version of the code includes the debug output trace mechanism and
11264 a much larger code and data size.
11267 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
11268 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
11270 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
11271 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
11274 2) iASL Compiler/Disassembler and Tools:
11276 No changes for this release.
11278 ----------------------------------------
11279 21 July 2006. Summary of changes for version 20060721:
11281 1) ACPI CA Core Subsystem:
11283 The full source code for the ASL test suite used to validate the iASL
11284 compiler and the ACPICA core subsystem is being released with the ACPICA
11285 source for the first time. The source is contained in a separate package
11287 consists of over 1100 files that exercise all ASL/AML operators. The
11289 should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
11293 Completed a new design and implementation for support of the ACPI Global
11294 Lock. On the OS side, the global lock is now treated as a standard AML
11295 mutex. Previously, multiple OS threads could "acquire" the global lock
11296 simultaneously. However, this could cause the BIOS to be starved out of
11298 lock - especially in cases such as the Embedded Controller driver where
11299 there is a tight coupling between the OS and the BIOS.
11301 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
11302 The Global Lock interrupt handler no longer queues the execution of a
11303 separate thread to signal the global lock semaphore. Instead, the
11305 is signaled directly from the interrupt handler.
11307 Implemented support within the AML interpreter for package objects that
11308 contain a larger AML length (package list length) than the package
11310 count. In this case, the length of the package is truncated to match the
11311 package element count. Some BIOS code apparently modifies the package
11313 on the fly, and this change supports this behavior. Provides
11315 with the MS AML interpreter. (With assistance from Fiodor Suietov)
11317 Implemented a temporary fix for the BankValue parameter of a Bank Field
11319 support all constant values, now including the Zero and One opcodes.
11320 Evaluation of this parameter must eventually be converted to a full
11322 evaluation. A not-implemented error is now returned (temporarily) for
11324 constant values for this parameter.
11326 Fixed problem reports (Fiodor Suietov) integrated:
11327 - Fix for premature object deletion after CopyObject on Operation Region
11331 Example Code and Data Size: These are the sizes for the OS-independent
11332 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11333 debug version of the code includes the debug output trace mechanism and
11335 a much larger code and data size.
11338 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
11339 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
11341 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
11342 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
11345 2) iASL Compiler/Disassembler and Tools:
11347 No changes for this release.
11349 ----------------------------------------
11350 07 July 2006. Summary of changes for version 20060707:
11352 1) ACPI CA Core Subsystem:
11354 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
11355 that do not allow the initialization of address pointers within packed
11356 structures - even though the hardware itself may support misaligned
11357 transfers. Some of the debug data structures are packed by default to
11360 Added an error message for the case where AcpiOsGetThreadId() returns
11362 A non-zero value is required by the core ACPICA code to ensure the proper
11363 operation of AML mutexes and recursive control methods.
11365 The DSDT is now the only ACPI table that determines whether the AML
11366 interpreter is in 32-bit or 64-bit mode. Not really a functional change,
11368 the hooks for per-table 32/64 switching have been removed from the code.
11370 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
11372 Fixed a possible leak of an OwnerID in the error path of
11373 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
11374 deletion to a single place in AcpiTbUninstallTable to correct possible
11376 when using the AcpiTbDeleteTablesByType interface (with assistance from
11379 Fixed a problem with Serialized control methods where the semaphore
11380 associated with the method could be over-signaled after multiple method
11383 Fixed two issues with the locking of the internal namespace data
11385 Both the Unload() operator and AcpiUnloadTable interface now lock the
11386 namespace during the namespace deletion associated with the table unload
11387 (with assistance from Linn Crosetto.)
11389 Fixed problem reports (Valery Podrezov) integrated:
11390 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
11392 Fixed problem reports (Fiodor Suietov) integrated:
11393 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
11394 - On Address Space handler deletion, needless deactivation call (BZ 374)
11395 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
11397 - Possible memory leak, Notify sub-objects of Processor, Power,
11400 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
11401 - Minimum Length of RSDT should be validated (BZ 379)
11402 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
11404 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
11408 Example Code and Data Size: These are the sizes for the OS-independent
11409 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11410 debug version of the code includes the debug output trace mechanism and
11412 a much larger code and data size.
11415 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
11416 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
11418 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
11419 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
11422 2) iASL Compiler/Disassembler and Tools:
11424 Fixed problem reports:
11425 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
11428 ----------------------------------------
11429 23 June 2006. Summary of changes for version 20060623:
11431 1) ACPI CA Core Subsystem:
11433 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
11434 allows the type to be customized to the host OS for improved efficiency
11435 (since a spinlock is usually a very small object.)
11437 Implemented support for "ignored" bits in the ACPI registers. According
11439 the ACPI specification, these bits should be preserved when writing the
11440 registers via a read/modify/write cycle. There are 3 bits preserved in
11442 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
11444 Implemented the initial deployment of new OSL mutex interfaces. Since
11446 host operating systems have separate mutex and semaphore objects, this
11447 feature was requested. The base code now uses mutexes (and the new mutex
11448 interfaces) wherever a binary semaphore was used previously. However, for
11449 the current release, the mutex interfaces are defined as macros to map
11451 to the existing semaphore interfaces. Therefore, no OSL changes are
11453 at this time. (See acpiosxf.h)
11455 Fixed several problems with the support for the control method SyncLevel
11456 parameter. The SyncLevel now works according to the ACPI specification
11458 in concert with the Mutex SyncLevel parameter, since the current
11460 is a property of the executing thread. Mutual exclusion for control
11462 is now implemented with a mutex instead of a semaphore.
11464 Fixed three instances of the use of the C shift operator in the bitfield
11465 support code (exfldio.c) to avoid the use of a shift value larger than
11467 target data width. The behavior of C compilers is undefined in this case
11469 can cause unpredictable results, and therefore the case must be detected
11471 avoided. (Fiodor Suietov)
11473 Added an info message whenever an SSDT or OEM table is loaded dynamically
11474 via the Load() or LoadTable() ASL operators. This should improve
11476 capability since it will show exactly what tables have been loaded
11478 the tables present in the RSDT/XSDT.)
11480 Example Code and Data Size: These are the sizes for the OS-independent
11481 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11482 debug version of the code includes the debug output trace mechanism and
11484 a much larger code and data size.
11487 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
11488 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
11490 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
11491 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
11494 2) iASL Compiler/Disassembler and Tools:
11496 No changes for this release.
11498 ----------------------------------------
11499 08 June 2006. Summary of changes for version 20060608:
11501 1) ACPI CA Core Subsystem:
11503 Converted the locking mutex used for the ACPI hardware to a spinlock.
11505 change should eliminate all problems caused by attempting to acquire a
11506 semaphore at interrupt level, and it means that all ACPICA external
11507 interfaces that directly access the ACPI hardware can be safely called
11509 interrupt level. OSL code that implements the semaphore interfaces should
11511 able to eliminate any workarounds for being called at interrupt level.
11513 Fixed a regression introduced in 20060526 where the ACPI device
11514 initialization could be prematurely aborted with an AE_NOT_FOUND if a
11516 did not have an optional _INI method.
11518 Fixed an IndexField issue where a write to the Data Register should be
11519 limited in size to the AccessSize (width) of the IndexField itself. (BZ
11523 Fixed problem reports (Valery Podrezov) integrated:
11524 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
11526 Fixed problem reports (Fiodor Suietov) integrated:
11527 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
11529 Removed four global mutexes that were obsolete and were no longer being
11532 Example Code and Data Size: These are the sizes for the OS-independent
11533 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11534 debug version of the code includes the debug output trace mechanism and
11536 a much larger code and data size.
11539 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
11540 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
11542 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
11543 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
11546 2) iASL Compiler/Disassembler and Tools:
11548 Fixed a fault when using -g option (get tables from registry) on Windows
11551 Fixed problem reports integrated:
11552 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
11553 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
11555 - Global table revision override (-r) is ignored (BZ 413)
11557 ----------------------------------------
11558 26 May 2006. Summary of changes for version 20060526:
11560 1) ACPI CA Core Subsystem:
11562 Restructured, flattened, and simplified the internal interfaces for
11563 namespace object evaluation - resulting in smaller code, less CPU stack
11565 and fewer interfaces. (With assistance from Mikhail Kouzmich)
11567 Fixed a problem with the CopyObject operator where the first parameter
11569 not typed correctly for the parser, interpreter, compiler, and
11571 Caused various errors and unexpected behavior.
11573 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
11574 produced incorrect results with some C compilers. Since the behavior of C
11575 compilers when the shift value is larger than the datatype width is
11576 apparently not well defined, the interpreter now detects this condition
11578 simply returns zero as expected in all such cases. (BZ 395)
11580 Fixed problem reports (Valery Podrezov) integrated:
11581 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
11582 - Allow interpreter to handle nested method declarations (BZ 5361)
11584 Fixed problem reports (Fiodor Suietov) integrated:
11585 - AcpiTerminate doesn't free debug memory allocation list objects (BZ
11587 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
11589 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
11590 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
11591 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
11592 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
11593 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
11594 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
11595 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
11597 - Status of the Global Initialization Handler call not used (BZ 366)
11598 - Incorrect object parameter to Global Initialization Handler (BZ 367)
11600 Example Code and Data Size: These are the sizes for the OS-independent
11601 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11602 debug version of the code includes the debug output trace mechanism and
11604 a much larger code and data size.
11607 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
11608 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
11610 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
11611 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
11614 2) iASL Compiler/Disassembler and Tools:
11616 Modified the parser to allow the names IO, DMA, and IRQ to be used as
11617 namespace identifiers with no collision with existing resource descriptor
11618 macro names. This provides compatibility with other ASL compilers and is
11619 most useful for disassembly/recompilation of existing tables without
11621 errors. (With assistance from Thomas Renninger)
11623 Disassembler: fixed an incorrect disassembly problem with the
11624 DataTableRegion and CopyObject operators. Fixed a possible fault during
11625 disassembly of some Alias operators.
11627 ----------------------------------------
11628 12 May 2006. Summary of changes for version 20060512:
11630 1) ACPI CA Core Subsystem:
11632 Replaced the AcpiOsQueueForExecution interface with a new interface named
11633 AcpiOsExecute. The major difference is that the new interface does not
11635 a Priority parameter, this appeared to be useless and has been replaced
11638 Type parameter. The Type tells the host what type of execution is being
11639 requested, such as global lock handler, notify handler, GPE handler, etc.
11640 This allows the host to queue and execute the request as appropriate for
11642 request type, possibly using different work queues and different
11644 for the various request types. This enables fixes for multithreading
11645 deadlock problems such as BZ #5534, and will require changes to all
11647 OS interface layers. (Alexey Starikovskiy and Bob Moore)
11649 Fixed a possible memory leak associated with the support for the so-
11651 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
11654 Fixed a problem with the Load() operator where a table load from an
11655 operation region could overwrite an internal table buffer by up to 7
11657 and cause alignment faults on IPF systems. (With assistance from Luming
11660 Example Code and Data Size: These are the sizes for the OS-independent
11661 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11662 debug version of the code includes the debug output trace mechanism and
11664 a much larger code and data size.
11667 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
11668 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
11670 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
11671 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
11675 2) iASL Compiler/Disassembler and Tools:
11677 Disassembler: Implemented support to cross reference the internal
11679 and automatically generate ASL External() statements for symbols not
11681 within the current table being disassembled. This will simplify the
11682 disassembly and recompilation of interdependent tables such as SSDTs
11684 these statements will no longer have to be added manually.
11686 Disassembler: Implemented experimental support to automatically detect
11687 invocations of external control methods and generate appropriate
11689 statements. This is problematic because the AML cannot be correctly
11691 until the number of arguments for each control method is known.
11693 standalone method invocations and invocations as the source operand of a
11694 Store() statement are supported.
11696 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
11697 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
11698 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
11699 more readable and likely closer to the original ASL source.
11701 ----------------------------------------
11702 21 April 2006. Summary of changes for version 20060421:
11704 1) ACPI CA Core Subsystem:
11706 Removed a device initialization optimization introduced in 20051216 where
11707 the _STA method was not run unless an _INI was also present for the same
11708 device. This optimization could cause problems because it could allow
11710 methods to be run within a not-present device subtree. (If a not-present
11711 device had no _INI, _STA would not be run, the not-present status would
11713 be discovered, and the children of the device would be incorrectly
11716 Implemented a new _STA optimization where namespace subtrees that do not
11717 contain _INI are identified and ignored during device initialization.
11718 Selectively running _STA can significantly improve boot time on large
11719 machines (with assistance from Len Brown.)
11721 Implemented support for the device initialization case where the returned
11722 _STA flags indicate a device not-present but functioning. In this case,
11724 is not run, but the device children are examined for presence, as per the
11725 ACPI specification.
11727 Implemented an additional change to the IndexField support in order to
11728 conform to MS behavior. The value written to the Index Register is not
11729 simply a byte offset, it is a byte offset in units of the access width of
11730 the parent Index Field. (Fiodor Suietov)
11732 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
11733 interface is called during the creation of all AML operation regions, and
11734 allows the host OS to exert control over what addresses it will allow the
11735 AML code to access. Operation Regions whose addresses are disallowed will
11736 cause a runtime exception when they are actually accessed (will not
11738 or abort table loading.) See oswinxf or osunixxf for an example
11741 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
11742 interface allows the host OS to match the various "optional"
11743 interface/behavior strings for the _OSI predefined control method as
11744 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
11745 for an example implementation.
11747 Restructured and corrected various problems in the exception handling
11749 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
11750 (with assistance from Takayoshi Kochi.)
11752 Modified the Linux source converter to ignore quoted string literals
11754 converting identifiers from mixed to lower case. This will correct
11756 with the disassembler and other areas where such strings must not be
11759 The ACPI_FUNCTION_* macros no longer require quotes around the function
11760 name. This allows the Linux source converter to convert the names, now
11762 the converter ignores quoted strings.
11764 Example Code and Data Size: These are the sizes for the OS-independent
11765 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11766 debug version of the code includes the debug output trace mechanism and
11768 a much larger code and data size.
11772 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
11773 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
11775 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
11776 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
11779 2) iASL Compiler/Disassembler and Tools:
11781 Implemented 3 new warnings for iASL, and implemented multiple warning
11785 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
11787 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
11788 check for the possible timeout, a warning is issued.
11790 2) Useless operators: If an ASL operator does not specify an optional
11792 operand and it also does not use the function return value from the
11793 operator, a warning is issued since the operator effectively does
11796 3) Unreferenced objects: If a namespace object is created, but never
11797 referenced, a warning is issued. This is a warning level 2 since there
11799 cases where this is ok, such as when a secondary table is loaded that
11801 the unreferenced objects. Even so, care is taken to only flag objects
11803 don't look like they will ever be used. For example, the reserved methods
11804 (starting with an underscore) are usually not referenced because it is
11805 expected that the OS will invoke them.
11807 ----------------------------------------
11808 31 March 2006. Summary of changes for version 20060331:
11810 1) ACPI CA Core Subsystem:
11812 Implemented header file support for the following additional ACPI tables:
11813 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
11815 all current and known ACPI tables are now defined in the ACPICA headers
11817 are available for use by device drivers and other software.
11819 Implemented support to allow tables that contain ACPI names with invalid
11820 characters to be loaded. Previously, this would cause the table load to
11821 fail, but since there are several known cases of such tables on existing
11822 machines, this change was made to enable ACPI support for them. Also,
11824 matches the behavior of the Microsoft ACPI implementation.
11826 Fixed a couple regressions introduced during the memory optimization in
11828 20060317 release. The namespace node definition required additional
11829 reorganization and an internal datatype that had been changed to 8-bit
11831 restored to 32-bit. (Valery Podrezov)
11833 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
11834 could be passed through to AcpiOsReleaseObject which is unexpected. Such
11835 null pointers are now trapped and ignored, matching the behavior of the
11836 previous implementation before the deployment of AcpiOsReleaseObject.
11837 (Valery Podrezov, Fiodor Suietov)
11839 Fixed a memory mapping leak during the deletion of a SystemMemory
11841 region where a cached memory mapping was not deleted. This became a
11842 noticeable problem for operation regions that are defined within
11844 used control methods. (Dana Meyers)
11846 Reorganized the ACPI table header files into two main files: one for the
11847 ACPI tables consumed by the ACPICA core, and another for the
11849 ACPI tables that are consumed by the drivers and other software. The
11851 FADT definitions were merged into one common section and three different
11852 tables (ACPI 1.0, 1.0+, and 2.0)
11854 Example Code and Data Size: These are the sizes for the OS-independent
11855 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11856 debug version of the code includes the debug output trace mechanism and
11858 a much larger code and data size.
11861 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
11862 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
11864 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
11865 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
11868 2) iASL Compiler/Disassembler and Tools:
11870 Disassembler: Implemented support to decode and format all non-AML ACPI
11871 tables (tables other than DSDTs and SSDTs.) This includes the new tables
11872 added to the ACPICA headers, therefore all current and known ACPI tables
11876 Disassembler: The change to allow ACPI names with invalid characters also
11877 enables the disassembly of such tables. Invalid characters within names
11879 changed to '*' to make the name printable; the iASL compiler will still
11880 generate an error for such names, however, since this is an invalid ACPI
11883 Implemented an option for AcpiXtract (-a) to extract all tables found in
11885 input file. The default invocation extracts only the DSDTs and SSDTs.
11887 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
11888 makefile for the AcpiXtract utility.
11890 ----------------------------------------
11891 17 March 2006. Summary of changes for version 20060317:
11893 1) ACPI CA Core Subsystem:
11895 Implemented the use of a cache object for all internal namespace nodes.
11896 Since there are about 1000 static nodes in a typical system, this will
11897 decrease memory use for cache implementations that minimize per-
11899 overhead (such as a slab allocator.)
11901 Removed the reference count mechanism for internal namespace nodes, since
11903 was deemed unnecessary. This reduces the size of each namespace node by
11904 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
11906 and 32 bytes for the 64-bit case.
11908 Optimized several internal data structures to reduce object size on 64-
11910 platforms by packing data within the 64-bit alignment. This includes the
11911 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
11912 instances corresponding to the namespace objects.
11914 Added two new strings for the predefined _OSI method: "Windows 2001.1
11916 and "Windows 2006".
11918 Split the allocation tracking mechanism out to a separate file, from
11919 utalloc.c to uttrack.c. This mechanism appears to be only useful for
11920 application-level code. Kernels may wish to not include uttrack.c in
11923 Removed all remnants of the obsolete ACPI_REPORT_* macros and the
11925 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
11928 Code and Data Size: These are the sizes for the acpica.lib produced by
11930 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11932 driver or OSPM code. The debug version of the code includes the debug
11934 trace mechanism and has a much larger code and data size. Note that these
11935 values will vary depending on the efficiency of the compiler and the
11936 compiler options used during generation.
11939 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11940 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
11942 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
11943 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
11946 2) iASL Compiler/Disassembler and Tools:
11948 Implemented an ANSI C version of the acpixtract utility. This version
11950 automatically extract the DSDT and all SSDTs from the input acpidump text
11951 file and dump the binary output to separate files. It can also display a
11952 summary of the input file including the headers for each table found and
11953 will extract any single ACPI table, with any signature. (See
11954 source/tools/acpixtract)
11956 ----------------------------------------
11957 10 March 2006. Summary of changes for version 20060310:
11959 1) ACPI CA Core Subsystem:
11961 Tagged all external interfaces to the subsystem with the new
11962 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
11964 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
11965 macro. The default definition is NULL.
11967 Added the ACPI_THREAD_ID type for the return value from
11969 This allows the host to define this as necessary to simplify kernel
11970 integration. The default definition is ACPI_NATIVE_UINT.
11972 Fixed two interpreter problems related to error processing, the deletion
11974 objects, and placing invalid pointers onto the internal operator result
11975 stack. BZ 6028, 6151 (Valery Podrezov)
11977 Increased the reference count threshold where a warning is emitted for
11979 reference counts in order to eliminate unnecessary warnings on systems
11981 large namespaces (especially 64-bit.) Increased the value from 0x400 to
11984 Due to universal disagreement as to the meaning of the 'c' in the
11986 function, the ACPI_MEM_CALLOCATE macro has been renamed to
11987 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
11988 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
11991 Code and Data Size: These are the sizes for the acpica.lib produced by
11993 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11995 driver or OSPM code. The debug version of the code includes the debug
11997 trace mechanism and has a much larger code and data size. Note that these
11998 values will vary depending on the efficiency of the compiler and the
11999 compiler options used during generation.
12002 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
12003 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
12005 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
12006 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
12009 2) iASL Compiler/Disassembler:
12011 Disassembler: implemented support for symbolic resource descriptor
12012 references. If a CreateXxxxField operator references a fixed offset
12015 resource descriptor, a name is assigned to the descriptor and the offset
12017 translated to the appropriate resource tag and pathname. The addition of
12018 this support brings the disassembled code very close to the original ASL
12019 source code and helps eliminate run-time errors when the disassembled
12021 is modified (and recompiled) in such a way as to invalidate the original
12024 Implemented support for a Descriptor Name as the last parameter to the
12026 Register() macro. This parameter was inadvertently left out of the ACPI
12027 specification, and will be added for ACPI 3.0b.
12029 Fixed a problem where the use of the "_OSI" string (versus the full path
12030 "\_OSI") caused an internal compiler error. ("No back ptr to op")
12032 Fixed a problem with the error message that occurs when an invalid string
12034 used for a _HID object (such as one with an embedded asterisk:
12036 The correct message is now displayed.
12038 ----------------------------------------
12039 17 February 2006. Summary of changes for version 20060217:
12041 1) ACPI CA Core Subsystem:
12043 Implemented a change to the IndexField support to match the behavior of
12045 Microsoft AML interpreter. The value written to the Index register is now
12047 byte offset, no longer an index based upon the width of the Data
12049 This should fix IndexField problems seen on some machines where the Data
12050 register is not exactly one byte wide. The ACPI specification will be
12051 clarified on this point.
12053 Fixed a problem where several resource descriptor types could overrun the
12054 internal descriptor buffer due to size miscalculation: VendorShort,
12055 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
12056 affect all platforms.
12058 Fixed a problem where individual resource descriptors were misaligned
12060 the internal buffer, causing alignment faults on IA64 platforms.
12062 Code and Data Size: These are the sizes for the acpica.lib produced by
12064 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
12066 driver or OSPM code. The debug version of the code includes the debug
12068 trace mechanism and has a much larger code and data size. Note that these
12069 values will vary depending on the efficiency of the compiler and the
12070 compiler options used during generation.
12073 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
12074 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
12076 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
12077 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
12080 2) iASL Compiler/Disassembler:
12082 Implemented support for new reserved names: _WDG and _WED are Microsoft
12083 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
12084 defined method (Throttling Depth Limit.)
12086 Fixed a problem where a zero-length VendorShort or VendorLong resource
12087 descriptor was incorrectly emitted as a descriptor of length one.
12089 ----------------------------------------
12090 10 February 2006. Summary of changes for version 20060210:
12092 1) ACPI CA Core Subsystem:
12094 Removed a couple of extraneous ACPI_ERROR messages that appeared during
12095 normal execution. These became apparent after the conversion from
12098 Fixed a problem where the CreateField operator could hang if the BitIndex
12100 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
12102 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
12103 failed with an exception. This also fixes a couple of related RefOf and
12104 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
12106 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
12108 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
12112 Implemented a memory cleanup at the end of the execution of each
12114 of an AML While() loop, preventing the accumulation of outstanding
12116 (Valery Podrezov, BZ 5427)
12118 Eliminated a chunk of duplicate code in the object resolution code.
12122 Fixed several warnings during the 64-bit code generation.
12124 The AcpiSrc source code conversion tool now inserts one line of
12126 after an if() statement that is followed immediately by a comment,
12128 readability of the Linux code.
12130 Code and Data Size: The current and previous library sizes for the core
12131 subsystem are shown below. These are the code and data sizes for the
12132 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12134 values do not include any ACPI driver or OSPM code. The debug version of
12136 code includes the debug output trace mechanism and has a much larger code
12137 and data size. Note that these values will vary depending on the
12139 of the compiler and the compiler options used during generation.
12142 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
12143 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
12145 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
12146 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
12149 2) iASL Compiler/Disassembler:
12151 Fixed a problem with the disassembly of a BankField operator with a
12153 expression for the BankValue parameter.
12155 ----------------------------------------
12156 27 January 2006. Summary of changes for version 20060127:
12158 1) ACPI CA Core Subsystem:
12160 Implemented support in the Resource Manager to allow unresolved
12162 references within resource package objects for the _PRT method. This
12164 is in addition to the previously implemented unresolved reference support
12165 within the AML parser. If the interpreter slack mode is enabled, these
12166 unresolved references will be passed through to the caller as a NULL
12170 Implemented and deployed new macros and functions for error and warning
12171 messages across the subsystem. These macros are simpler and generate less
12172 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
12173 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
12174 macros remain defined to allow ACPI drivers time to migrate to the new
12177 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
12179 Acquire/Release Lock OSL interfaces.
12181 Fixed a problem where Alias ASL operators are sometimes not correctly
12182 resolved, in both the interpreter and the iASL compiler.
12184 Fixed several problems with the implementation of the
12185 ConcatenateResTemplate
12186 ASL operator. As per the ACPI specification, zero length buffers are now
12187 treated as a single EndTag. One-length buffers always cause a fatal
12188 exception. Non-zero length buffers that do not end with a full 2-byte
12190 cause a fatal exception.
12192 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
12193 interface. (With assistance from Thomas Renninger)
12195 Code and Data Size: The current and previous library sizes for the core
12196 subsystem are shown below. These are the code and data sizes for the
12197 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12199 values do not include any ACPI driver or OSPM code. The debug version of
12201 code includes the debug output trace mechanism and has a much larger code
12202 and data size. Note that these values will vary depending on the
12204 of the compiler and the compiler options used during generation.
12207 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
12208 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
12210 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
12211 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
12214 2) iASL Compiler/Disassembler:
12216 Fixed an internal error that was generated for any forward references to
12220 ----------------------------------------
12221 13 January 2006. Summary of changes for version 20060113:
12223 1) ACPI CA Core Subsystem:
12225 Added 2006 copyright to all module headers and signons. This affects
12226 virtually every file in the ACPICA core subsystem, iASL compiler, and the
12229 Enhanced the ACPICA error reporting in order to simplify user migration
12231 the non-debug version of ACPICA. Replaced all instances of the
12232 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
12234 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
12235 respectively. This preserves all error and warning messages in the non-
12237 version of the ACPICA code (this has been referred to as the "debug lite"
12238 option.) Over 200 cases were converted to create a total of over 380
12239 error/warning messages across the ACPICA code. This increases the code
12241 data size of the default non-debug version of the code somewhat (about
12243 but all error/warning reporting may be disabled if desired (and code
12244 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
12245 configuration option. The size of the debug version of ACPICA remains
12249 Fixed a memory leak within the AML Debugger "Set" command. One object was
12250 not properly deleted for every successful invocation of the command.
12252 Code and Data Size: The current and previous library sizes for the core
12253 subsystem are shown below. These are the code and data sizes for the
12254 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12256 values do not include any ACPI driver or OSPM code. The debug version of
12258 code includes the debug output trace mechanism and has a much larger code
12259 and data size. Note that these values will vary depending on the
12261 of the compiler and the compiler options used during generation.
12264 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
12265 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
12267 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
12268 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
12271 2) iASL Compiler/Disassembler:
12273 The compiler now officially supports the ACPI 3.0a specification that was
12274 released on December 30, 2005. (Specification is available at
12277 ----------------------------------------
12278 16 December 2005. Summary of changes for version 20051216:
12280 1) ACPI CA Core Subsystem:
12282 Implemented optional support to allow unresolved names within ASL Package
12283 objects. A null object is inserted in the package when a named reference
12284 cannot be located in the current namespace. Enabled via the interpreter
12285 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
12287 that contain such code.
12289 Implemented an optimization to the initialization sequence that can
12291 boot time. During ACPI device initialization, the _STA method is now run
12293 and only if the _INI method exists. The _STA method is used to determine
12295 the device is present; An _INI can only be run if _STA returns present,
12297 it is a waste of time to run the _STA method if the _INI does not exist.
12298 (Prototype and assistance from Dong Wei)
12300 Implemented use of the C99 uintptr_t for the pointer casting macros if it
12302 available in the current compiler. Otherwise, the default (void *) cast
12306 Fixed some possible memory leaks found within the execution path of the
12307 Break, Continue, If, and CreateField operators. (Valery Podrezov)
12309 Fixed a problem introduced in the 20051202 release where an exception is
12310 generated during method execution if a control method attempts to declare
12313 Moved resource descriptor string constants that are used by both the AML
12314 disassembler and AML debugger to the common utilities directory so that
12315 these components are independent.
12317 Implemented support in the AcpiExec utility (-e switch) to globally
12319 exceptions during control method execution (method is not aborted.)
12321 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
12324 Code and Data Size: The current and previous library sizes for the core
12325 subsystem are shown below. These are the code and data sizes for the
12326 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12328 values do not include any ACPI driver or OSPM code. The debug version of
12330 code includes the debug output trace mechanism and has a much larger code
12331 and data size. Note that these values will vary depending on the
12333 of the compiler and the compiler options used during generation.
12336 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
12337 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
12339 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
12340 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
12343 2) iASL Compiler/Disassembler:
12345 Fixed a problem where a CPU stack overflow fault could occur if a
12347 method call was made from within a Return statement.
12349 ----------------------------------------
12350 02 December 2005. Summary of changes for version 20051202:
12352 1) ACPI CA Core Subsystem:
12354 Modified the parsing of control methods to no longer create namespace
12355 objects during the first pass of the parse. Objects are now created only
12356 during the execute phase, at the moment the namespace creation operator
12358 encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
12360 should eliminate ALREADY_EXISTS exceptions seen on some machines where
12361 reentrant control methods are protected by an AML mutex. The mutex will
12363 correctly block multiple threads from attempting to create the same
12367 Increased the number of available Owner Ids for namespace object tracking
12368 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
12370 some machines with a large number of ACPI tables (either static or
12373 Fixed a problem with the AcpiExec utility where a fault could occur when
12375 -b switch (batch mode) is used.
12377 Enhanced the namespace dump routine to output the owner ID for each
12380 Code and Data Size: The current and previous library sizes for the core
12381 subsystem are shown below. These are the code and data sizes for the
12382 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12384 values do not include any ACPI driver or OSPM code. The debug version of
12386 code includes the debug output trace mechanism and has a much larger code
12387 and data size. Note that these values will vary depending on the
12389 of the compiler and the compiler options used during generation.
12392 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
12393 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
12395 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
12396 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
12399 2) iASL Compiler/Disassembler:
12401 Fixed a parse error during compilation of certain Switch/Case constructs.
12403 simplify the parse, the grammar now allows for multiple Default
12405 and this error is now detected and flagged during the analysis phase.
12407 Disassembler: The disassembly now includes the contents of the original
12408 table header within a comment at the start of the file. This includes the
12409 name and version of the original ASL compiler.
12411 ----------------------------------------
12412 17 November 2005. Summary of changes for version 20051117:
12414 1) ACPI CA Core Subsystem:
12416 Fixed a problem in the AML parser where the method thread count could be
12417 decremented below zero if any errors occurred during the method parse
12419 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
12421 This also fixed a related regression with the mechanism that detects and
12422 corrects methods that cannot properly handle reentrancy (related to the
12423 deployment of the new OwnerId mechanism.)
12425 Eliminated the pre-parsing of control methods (to detect errors) during
12426 table load. Related to the problem above, this was causing unwind issues
12428 any errors occurred during the parse, and it seemed to be overkill. A
12430 load should not be aborted if there are problems with any single control
12431 method, thus rendering this feature rather pointless.
12433 Fixed a problem with the new table-driven resource manager where an
12435 buffer overflow could occur for small resource templates.
12437 Implemented a new external interface, AcpiGetVendorResource. This
12439 will find and return a vendor-defined resource descriptor within a _CRS
12441 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
12444 Removed the length limit (200) on string objects as per the upcoming ACPI
12445 3.0A specification. This affects the following areas of the interpreter:
12447 any implicit conversion of a Buffer to a String, 2) a String object
12449 of the ASL Concatenate operator, 3) the String object result of the ASL
12452 Fixed a problem in the Windows OS interface layer (OSL) where a
12454 on a semaphore object would incorrectly timeout. This allows the
12455 multithreading features of the AcpiExec utility to work properly under
12458 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
12459 the recently added file named "utresrc.c".
12461 Code and Data Size: The current and previous library sizes for the core
12462 subsystem are shown below. These are the code and data sizes for the
12463 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12465 values do not include any ACPI driver or OSPM code. The debug version of
12467 code includes the debug output trace mechanism and has a much larger code
12468 and data size. Note that these values will vary depending on the
12470 of the compiler and the compiler options used during generation.
12473 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
12474 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
12476 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
12477 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
12480 2) iASL Compiler/Disassembler:
12482 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
12483 specification. For the iASL compiler, this means that string literals
12485 the source ASL can be of any length.
12487 Enhanced the listing output to dump the AML code for resource descriptors
12488 immediately after the ASL code for each descriptor, instead of in a block
12490 the end of the entire resource template.
12492 Enhanced the compiler debug output to dump the entire original parse tree
12493 constructed during the parse phase, before any transforms are applied to
12495 tree. The transformed tree is dumped also.
12497 ----------------------------------------
12498 02 November 2005. Summary of changes for version 20051102:
12500 1) ACPI CA Core Subsystem:
12502 Modified the subsystem initialization sequence to improve GPE support.
12504 GPE initialization has been split into two parts in order to defer
12506 of the _PRW methods (Power Resources for Wake) until after the hardware
12508 fully initialized and the SCI handler is installed. This allows the _PRW
12509 methods to access fields protected by the Global Lock. This will fix
12511 where a NO_GLOBAL_LOCK exception has been seen during initialization.
12513 Converted the ACPI internal object disassemble and display code within
12515 AML debugger to fully table-driven operation, reducing code size and
12516 increasing maintainability.
12518 Fixed a regression with the ConcatenateResTemplate() ASL operator
12520 in the 20051021 release.
12522 Implemented support for "local" internal ACPI object types within the
12523 debugger "Object" command and the AcpiWalkNamespace external interfaces.
12524 These local types include RegionFields, BankFields, IndexFields, Alias,
12528 Moved common AML resource handling code into a new file, "utresrc.c".
12530 code is shared by both the Resource Manager and the AML Debugger.
12532 Code and Data Size: The current and previous library sizes for the core
12533 subsystem are shown below. These are the code and data sizes for the
12534 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12536 values do not include any ACPI driver or OSPM code. The debug version of
12538 code includes the debug output trace mechanism and has a much larger code
12539 and data size. Note that these values will vary depending on the
12541 of the compiler and the compiler options used during generation.
12544 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
12545 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
12547 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
12548 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
12551 2) iASL Compiler/Disassembler:
12553 Fixed a problem with very large initializer lists (more than 4000
12555 for both Buffer and Package objects where the parse stack could overflow.
12557 Enhanced the pre-compile source code scan for non-ASCII characters to
12559 characters within comment fields. The scan is now always performed and is
12561 longer optional, detecting invalid characters within a source file
12562 immediately rather than during the parse phase or later.
12564 Enhanced the ASL grammar definition to force early reductions on all
12566 style grammar elements so that the overall parse stack usage is greatly
12567 reduced. This should improve performance and reduce the possibility of
12571 Eliminated all reduce/reduce conflicts in the iASL parser generation.
12573 with the addition of a %expected statement, the compiler generates from
12574 source with no warnings.
12576 Fixed a possible segment fault in the disassembler if the input filename
12577 does not contain a "dot" extension (Thomas Renninger).
12579 ----------------------------------------
12580 21 October 2005. Summary of changes for version 20051021:
12582 1) ACPI CA Core Subsystem:
12584 Implemented support for the EM64T and other x86-64 processors. This
12585 essentially entails recognizing that these processors support non-aligned
12586 memory transfers. Previously, all 64-bit processors were assumed to lack
12587 hardware support for non-aligned transfers.
12589 Completed conversion of the Resource Manager to nearly full table-driven
12590 operation. Specifically, the resource conversion code (convert AML to
12591 internal format and the reverse) and the debug code to dump internal
12592 resource descriptors are fully table-driven, reducing code and data size
12594 improving maintainability.
12596 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
12598 on 64-bit processors instead of a fixed 32-bit word. (With assistance
12600 Alexey Starikovskiy)
12602 Implemented support within the resource conversion code for the Type-
12603 Specific byte within the various ACPI 3.0 *WordSpace macros.
12605 Fixed some issues within the resource conversion code for the type-
12607 flags for both Memory and I/O address resource descriptors. For Memory,
12608 implemented support for the MTP and TTP flags. For I/O, split the TRS and
12609 TTP flags into two separate fields.
12611 Code and Data Size: The current and previous library sizes for the core
12612 subsystem are shown below. These are the code and data sizes for the
12613 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12615 values do not include any ACPI driver or OSPM code. The debug version of
12617 code includes the debug output trace mechanism and has a much larger code
12618 and data size. Note that these values will vary depending on the
12620 of the compiler and the compiler options used during generation.
12623 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
12624 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
12626 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
12627 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
12631 2) iASL Compiler/Disassembler:
12633 Relaxed a compiler restriction that disallowed a ResourceIndex byte if
12635 corresponding ResourceSource string was not also present in a resource
12636 descriptor declaration. This restriction caused problems with existing
12637 AML/ASL code that includes the Index byte without the string. When such
12639 was disassembled, it could not be compiled without modification. Further,
12640 the modified code created a resource template with a different size than
12642 original, breaking code that used fixed offsets into the resource
12646 Removed a recent feature of the disassembler to ignore a lone
12648 byte. This byte is now emitted if present so that the exact AML can be
12649 reproduced when the disassembled code is recompiled.
12651 Improved comments and text alignment for the resource descriptor code
12652 emitted by the disassembler.
12654 Implemented disassembler support for the ACPI 3.0 AccessSize field within
12656 Register() resource descriptor.
12658 ----------------------------------------
12659 30 September 2005. Summary of changes for version 20050930:
12661 1) ACPI CA Core Subsystem:
12663 Completed a major overhaul of the Resource Manager code - specifically,
12664 optimizations in the area of the AML/internal resource conversion code.
12666 code has been optimized to simplify and eliminate duplicated code, CPU
12668 use has been decreased by optimizing function parameters and local
12669 variables, and naming conventions across the manager have been
12671 for clarity and ease of maintenance (this includes function, parameter,
12672 variable, and struct/typedef names.) The update may force changes in some
12673 driver code, depending on how resources are handled by the host OS.
12675 All Resource Manager dispatch and information tables have been moved to a
12676 single location for clarity and ease of maintenance. One new file was
12677 created, named "rsinfo.c".
12679 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
12680 guarantee that the argument is not evaluated twice, making them less
12682 to macro side-effects. However, since there exists the possibility of
12683 additional stack use if a particular compiler cannot optimize them (such
12685 in the debug generation case), the original macros are optionally
12687 Note that some invocations of the return_VALUE macro may now cause size
12688 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
12690 eliminate these. (From Randy Dunlap)
12692 Implemented a new mechanism to enable debug tracing for individual
12694 methods. A new external interface, AcpiDebugTrace, is provided to enable
12695 this mechanism. The intent is to allow the host OS to easily enable and
12696 disable tracing for problematic control methods. This interface can be
12697 easily exposed to a user or debugger interface if desired. See the file
12698 psxface.c for details.
12700 AcpiUtCallocate will now return a valid pointer if a length of zero is
12701 specified - a length of one is used and a warning is issued. This matches
12702 the behavior of AcpiUtAllocate.
12704 Code and Data Size: The current and previous library sizes for the core
12705 subsystem are shown below. These are the code and data sizes for the
12706 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12708 values do not include any ACPI driver or OSPM code. The debug version of
12710 code includes the debug output trace mechanism and has a much larger code
12711 and data size. Note that these values will vary depending on the
12713 of the compiler and the compiler options used during generation.
12716 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
12717 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
12719 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
12720 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
12723 2) iASL Compiler/Disassembler:
12725 A remark is issued if the effective compile-time length of a package or
12726 buffer is zero. Previously, this was a warning.
12728 ----------------------------------------
12729 16 September 2005. Summary of changes for version 20050916:
12731 1) ACPI CA Core Subsystem:
12733 Fixed a problem within the Resource Manager where support for the Generic
12734 Register descriptor was not fully implemented. This descriptor is now
12736 recognized, parsed, disassembled, and displayed.
12738 Completely restructured the Resource Manager code to utilize table-driven
12739 dispatch and lookup, eliminating many of the large switch() statements.
12741 reduces overall subsystem code size and code complexity. Affects the
12742 resource parsing and construction, disassembly, and debug dump output.
12744 Cleaned up and restructured the debug dump output for all resource
12745 descriptors. Improved readability of the output and reduced code size.
12747 Fixed a problem where changes to internal data structures caused the
12748 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
12750 Code and Data Size: The current and previous library sizes for the core
12751 subsystem are shown below. These are the code and data sizes for the
12752 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12754 values do not include any ACPI driver or OSPM code. The debug version of
12756 code includes the debug output trace mechanism and has a much larger code
12757 and data size. Note that these values will vary depending on the
12759 of the compiler and the compiler options used during generation.
12762 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
12763 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
12765 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
12766 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
12769 2) iASL Compiler/Disassembler:
12771 Updated the disassembler to automatically insert an EndDependentFn()
12773 into the ASL stream if this macro is missing in the original AML code,
12774 simplifying compilation of the resulting ASL module.
12776 Fixed a problem in the disassembler where a disassembled ResourceSource
12777 string (within a large resource descriptor) was not surrounded by quotes
12779 not followed by a comma, causing errors when the resulting ASL module was
12780 compiled. Also, escape sequences within a ResourceSource string are now
12781 handled correctly (especially "\\")
12783 ----------------------------------------
12784 02 September 2005. Summary of changes for version 20050902:
12786 1) ACPI CA Core Subsystem:
12788 Fixed a problem with the internal Owner ID allocation and deallocation
12789 mechanisms for control method execution and recursive method invocation.
12790 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
12791 messages seen on some systems. Recursive method invocation depth is
12792 currently limited to 255. (Alexey Starikovskiy)
12794 Completely eliminated all vestiges of support for the "module-level
12795 executable code" until this support is fully implemented and debugged.
12797 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
12798 some systems that invoke this support.
12800 Fixed a problem within the resource manager code where the transaction
12802 for a 64-bit address descriptor were handled incorrectly in the type-
12803 specific flag byte.
12805 Consolidated duplicate code within the address descriptor resource
12807 code, reducing overall subsystem code size.
12809 Fixed a fault when using the AML debugger "disassemble" command to
12810 disassemble individual control methods.
12812 Removed references to the "release_current" directory within the Unix
12815 Code and Data Size: The current and previous core subsystem library sizes
12816 are shown below. These are the code and data sizes for the acpica.lib
12817 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
12818 include any ACPI driver or OSPM code. The debug version of the code
12820 the debug output trace mechanism and has a much larger code and data
12822 Note that these values will vary depending on the efficiency of the
12824 and the compiler options used during generation.
12827 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12828 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
12830 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
12831 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
12834 2) iASL Compiler/Disassembler:
12836 Implemented an error check for illegal duplicate values in the interrupt
12838 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
12841 Implemented error checking for the Irq() and IrqNoFlags() macros to
12843 too many values in the interrupt list (16 max) and invalid values in the
12844 list (range 0 - 15)
12846 The maximum length string literal within an ASL file is now restricted to
12847 200 characters as per the ACPI specification.
12849 Fixed a fault when using the -ln option (generate namespace listing).
12851 Implemented an error check to determine if a DescriptorName within a
12852 resource descriptor has already been used within the current scope.
12854 ----------------------------------------
12855 15 August 2005. Summary of changes for version 20050815:
12857 1) ACPI CA Core Subsystem:
12859 Implemented a full bytewise compare to determine if a table load request
12861 attempting to load a duplicate table. The compare is performed if the
12863 signatures and table lengths match. This will allow different tables with
12864 the same OEM Table ID and revision to be loaded - probably against the
12866 specification, but discovered in the field nonetheless.
12868 Added the changes.txt logfile to each of the zipped release packages.
12870 Code and Data Size: Current and previous core subsystem library sizes are
12871 shown below. These are the code and data sizes for the acpica.lib
12873 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12874 any ACPI driver or OSPM code. The debug version of the code includes the
12875 debug output trace mechanism and has a much larger code and data size.
12877 that these values will vary depending on the efficiency of the compiler
12879 the compiler options used during generation.
12882 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12883 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
12885 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12886 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
12889 2) iASL Compiler/Disassembler:
12891 Fixed a problem where incorrect AML code could be generated for Package
12892 objects if optimization is disabled (via the -oa switch).
12894 Fixed a problem with where incorrect AML code is generated for variable-
12895 length packages when the package length is not specified and the number
12897 initializer values is greater than 255.
12900 ----------------------------------------
12901 29 July 2005. Summary of changes for version 20050729:
12903 1) ACPI CA Core Subsystem:
12905 Implemented support to ignore an attempt to install/load a particular
12907 table more than once. Apparently there exists BIOS code that repeatedly
12908 attempts to load the same SSDT upon certain events. With assistance from
12909 Venkatesh Pallipadi.
12911 Restructured the main interface to the AML parser in order to correctly
12912 handle all exceptional conditions. This will prevent leakage of the
12914 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
12916 machines. With assistance from Alexey Starikovskiy.
12918 Support for "module level code" has been disabled in this version due to
12920 number of issues that have appeared on various machines. The support can
12922 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
12923 compilation. When the issues are fully resolved, the code will be enabled
12927 Modified the internal functions for debug print support to define the
12928 FunctionName parameter as a (const char *) for compatibility with
12930 built-in macros such as __FUNCTION__, etc.
12932 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
12934 Implemented support to display an object count summary for the AML
12936 commands Object and Methods.
12938 Code and Data Size: Current and previous core subsystem library sizes are
12939 shown below. These are the code and data sizes for the acpica.lib
12941 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12942 any ACPI driver or OSPM code. The debug version of the code includes the
12943 debug output trace mechanism and has a much larger code and data size.
12945 that these values will vary depending on the efficiency of the compiler
12947 the compiler options used during generation.
12950 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
12951 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
12953 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12954 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
12957 2) iASL Compiler/Disassembler:
12959 Fixed a regression that appeared in the 20050708 version of the compiler
12960 where an error message was inadvertently emitted for invocations of the
12962 reserved control method.
12964 ----------------------------------------
12965 08 July 2005. Summary of changes for version 20050708:
12967 1) ACPI CA Core Subsystem:
12969 The use of the CPU stack in the debug version of the subsystem has been
12970 considerably reduced. Previously, a debug structure was declared in every
12971 function that used the debug macros. This structure has been removed in
12972 favor of declaring the individual elements as parameters to the debug
12973 functions. This reduces the cumulative stack use during nested execution
12975 ACPI function calls at the cost of a small increase in the code size of
12977 debug version of the subsystem. With assistance from Alexey Starikovskiy
12981 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
12982 headers to define a macro that will return the current function name at
12983 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
12985 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
12986 compiler-dependent header, the function name is saved on the CPU stack
12988 pointer per function.) This mechanism is used because apparently there
12989 exists no standard ANSI-C defined macro that that returns the function
12992 Redesigned and reimplemented the "Owner ID" mechanism used to track
12993 namespace objects created/deleted by ACPI tables and control method
12994 execution. A bitmap is now used to allocate and free the IDs, thus
12996 the wraparound problem present in the previous implementation. The size
12998 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
13001 Removed the UINT32_BIT and UINT16_BIT types that were used for the
13003 flag definitions within the headers for the predefined ACPI tables. These
13004 have been replaced by UINT8_BIT in order to increase the code portability
13006 the subsystem. If the use of UINT8 remains a problem, we may be forced to
13007 eliminate bitfields entirely because of a lack of portability.
13009 Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
13011 is a frequently used function and this improvement increases the
13013 of the entire subsystem (Alexey Starikovskiy).
13015 Fixed several possible memory leaks and the inverse - premature object
13016 deletion (Alexey Starikovskiy).
13018 Code and Data Size: Current and previous core subsystem library sizes are
13019 shown below. These are the code and data sizes for the acpica.lib
13021 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13022 any ACPI driver or OSPM code. The debug version of the code includes the
13023 debug output trace mechanism and has a much larger code and data size.
13025 that these values will vary depending on the efficiency of the compiler
13027 the compiler options used during generation.
13030 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
13031 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
13033 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
13034 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
13036 ----------------------------------------
13037 24 June 2005. Summary of changes for version 20050624:
13039 1) ACPI CA Core Subsystem:
13041 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
13042 the host-defined cache object. This allows the OSL implementation to
13044 and type this object in any manner desired, simplifying the OSL
13045 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
13046 Linux, and should be defined in the OS-specific header file for other
13047 operating systems as required.
13049 Changed the interface to AcpiOsAcquireObject to directly return the
13050 requested object as the function return (instead of ACPI_STATUS.) This
13051 change was made for performance reasons, since this is the purpose of the
13052 interface in the first place. AcpiOsAcquireObject is now similar to the
13053 AcpiOsAllocate interface.
13055 Implemented a new AML debugger command named Businfo. This command
13057 information about all devices that have an associate _PRT object. The
13059 _HID, _UID, and _CID are displayed for these devices.
13061 Modified the initialization sequence in AcpiInitializeSubsystem to call
13063 OSL interface AcpiOslInitialize first, before any local initialization.
13065 change was required because the global initialization now calls OSL
13068 Enhanced the Dump command to display the entire contents of Package
13070 (including all sub-objects and their values.)
13072 Restructured the code base to split some files because of size and/or
13073 because the code logically belonged in a separate file. New files are
13075 below. All makefiles and project files included in the ACPI CA release
13078 utilities/utcache.c /* Local cache interfaces */
13079 utilities/utmutex.c /* Local mutex support */
13080 utilities/utstate.c /* State object support */
13081 interpreter/parser/psloop.c /* Main AML parse loop */
13083 Code and Data Size: Current and previous core subsystem library sizes are
13084 shown below. These are the code and data sizes for the acpica.lib
13086 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13087 any ACPI driver or OSPM code. The debug version of the code includes the
13088 debug output trace mechanism and has a much larger code and data size.
13090 that these values will vary depending on the efficiency of the compiler
13092 the compiler options used during generation.
13095 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
13096 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
13098 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
13099 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
13102 2) iASL Compiler/Disassembler:
13104 Fixed a regression introduced in version 20050513 where the use of a
13106 object within a Case() statement caused a compile time exception. The
13107 original behavior has been restored (a Match() operator is emitted.)
13109 ----------------------------------------
13110 17 June 2005. Summary of changes for version 20050617:
13112 1) ACPI CA Core Subsystem:
13114 Moved the object cache operations into the OS interface layer (OSL) to
13116 the host OS to handle these operations if desired (for example, the Linux
13117 OSL will invoke the slab allocator). This support is optional; the
13119 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
13121 code in the ACPI CA core. The new OSL interfaces are shown below. See
13122 utalloc.c for an example implementation, and acpiosxf.h for the exact
13123 interface definitions. With assistance from Alexey Starikovskiy.
13127 AcpiOsAcquireObject
13128 AcpiOsReleaseObject
13130 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
13132 and restore a flags parameter. This fits better with many OS lock models.
13133 Note: the current execution state (interrupt handler or not) is no longer
13134 passed to these interfaces. If necessary, the OSL must determine this
13136 by itself, a simple and fast operation. With assistance from Alexey
13139 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
13140 present if the revision of the RSDP was 2 or greater. According to the
13142 specification, the XSDT is optional in all cases, and the table manager
13143 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
13144 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
13148 Fixed an interpreter problem with the Mid() operator in the case of an
13150 string where the resulting output string is of zero length. It now
13152 returns a valid, null terminated string object instead of a string object
13153 with a null pointer.
13155 Fixed a problem with the control method argument handling to allow a
13157 to an Arg object that already contains an object of type Device. The
13159 object is now correctly overwritten. Previously, an error was returned.
13162 Enhanced the debugger Find command to emit object values in addition to
13164 found object pathnames. The output format is the same as the dump
13168 Enhanced the debugger Set command. It now has the ability to set the
13170 of any Named integer object in the namespace (Previously, only method
13172 and args could be set.)
13174 Code and Data Size: Current and previous core subsystem library sizes are
13175 shown below. These are the code and data sizes for the acpica.lib
13177 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13178 any ACPI driver or OSPM code. The debug version of the code includes the
13179 debug output trace mechanism and has a much larger code and data size.
13181 that these values will vary depending on the efficiency of the compiler
13183 the compiler options used during generation.
13186 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
13187 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
13189 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
13190 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
13193 2) iASL Compiler/Disassembler:
13195 Fixed a regression in the disassembler where if/else/while constructs
13197 output incorrectly. This problem was introduced in the previous release
13198 (20050526). This problem also affected the single-step disassembly in the
13201 Fixed a problem where compiling the reserved _OSI method would randomly
13203 rarely) produce compile errors.
13205 Enhanced the disassembler to emit compilable code in the face of
13207 AML resource descriptors. If the optional ResourceSourceIndex is present,
13208 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
13209 disassembly. Otherwise, the resulting code cannot be compiled without
13212 ----------------------------------------
13213 26 May 2005. Summary of changes for version 20050526:
13215 1) ACPI CA Core Subsystem:
13217 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
13218 the module level (not within a control method.) These opcodes are
13220 exactly once at the time the table is loaded. This type of code was legal
13222 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
13224 order to provide backwards compatibility with earlier BIOS
13226 This eliminates the "Encountered executable code at module level" warning
13227 that was previously generated upon detection of such code.
13229 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
13230 inadvertently be generated during the lookup of namespace objects in the
13231 second pass parse of ACPI tables and control methods. It appears that
13233 problem could occur during the resolution of forward references to
13237 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
13238 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
13239 allows the deadlock detection debug code to be compiled out in the normal
13240 case, improving mutex performance (and overall subsystem performance)
13243 Implemented a handful of miscellaneous fixes for possible memory leaks on
13244 error conditions and error handling control paths. These fixes were
13245 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
13247 Added a check for a null RSDT pointer in AcpiGetFirmwareTable
13249 to prevent a fault in this error case.
13251 Code and Data Size: Current and previous core subsystem library sizes are
13252 shown below. These are the code and data sizes for the acpica.lib
13254 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13255 any ACPI driver or OSPM code. The debug version of the code includes the
13256 debug output trace mechanism and has a much larger code and data size.
13258 that these values will vary depending on the efficiency of the compiler
13260 the compiler options used during generation.
13263 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
13264 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
13266 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
13267 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
13270 2) iASL Compiler/Disassembler:
13272 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
13273 the module level (not within a control method.) These operators will be
13274 executed once at the time the table is loaded. This type of code was
13276 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
13277 compiler in order to provide backwards compatibility with earlier BIOS
13281 The ACPI integer width (specified via the table revision ID or the -r
13282 override, 32 or 64 bits) is now used internally during compile-time
13284 folding to ensure that constants are truncated to 32 bits if necessary.
13285 Previously, the revision ID value was only emitted in the AML table
13288 An error message is now generated for the Mutex and Method operators if
13290 SyncLevel parameter is outside the legal range of 0 through 15.
13292 Fixed a problem with the Method operator ParameterTypes list handling
13294 3.0). Previously, more than 2 types or 2 arguments generated a syntax
13296 The actual underlying implementation of method argument typechecking is
13297 still under development, however.
13299 ----------------------------------------
13300 13 May 2005. Summary of changes for version 20050513:
13302 1) ACPI CA Core Subsystem:
13304 Implemented support for PCI Express root bridges -- added support for
13306 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
13308 The interpreter now automatically truncates incoming 64-bit constants to
13310 bits if currently executing out of a 32-bit ACPI table (Revision < 2).
13312 also affects the iASL compiler constant folding. (Note: as per below, the
13313 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
13315 Fixed a problem where string and buffer objects with "static" pointers
13316 (pointers to initialization data within an ACPI table) were not handled
13317 consistently. The internal object copy operation now always copies the
13319 to a newly allocated buffer, regardless of whether the source object is
13322 Fixed a problem with the FromBCD operator where an implicit result
13323 conversion was improperly performed while storing the result to the
13325 operand. Since this is an "explicit conversion" operator, the implicit
13326 conversion should never be performed on the output.
13328 Fixed a problem with the CopyObject operator where a copy to an existing
13329 named object did not always completely overwrite the existing object
13331 at name. Specifically, a buffer-to-buffer copy did not delete the
13335 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
13337 structs for consistency.
13339 Code and Data Size: Current and previous core subsystem library sizes are
13340 shown below. These are the code and data sizes for the acpica.lib
13342 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13343 any ACPI driver or OSPM code. The debug version of the code includes the
13344 debug output trace mechanism and has a much larger code and data size.
13346 that these values will vary depending on the efficiency of the compiler
13348 the compiler options used during generation.
13351 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
13352 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
13353 Current Release: (Same sizes)
13354 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
13355 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
13358 2) iASL Compiler/Disassembler:
13360 The compiler now emits a warning if an attempt is made to generate a 64-
13362 integer constant from within a 32-bit ACPI table (Revision < 2). The
13364 is truncated to 32 bits.
13366 Fixed a problem with large package objects: if the static length of the
13367 package is greater than 255, the "variable length package" opcode is
13368 emitted. Previously, this caused an error. This requires an update to the
13369 ACPI spec, since it currently (incorrectly) states that packages larger
13371 255 elements are not allowed.
13373 The disassembler now correctly handles variable length packages and
13375 larger than 255 elements.
13377 ----------------------------------------
13378 08 April 2005. Summary of changes for version 20050408:
13380 1) ACPI CA Core Subsystem:
13382 Fixed three cases in the interpreter where an "index" argument to an ASL
13383 function was still (internally) 32 bits instead of the required 64 bits.
13384 This was the Index argument to the Index, Mid, and Match operators.
13386 The "strupr" function is now permanently local (AcpiUtStrupr), since this
13388 not a POSIX-defined function and not present in most kernel-level C
13389 libraries. All references to the C library strupr function have been
13393 Completed the deployment of static functions/prototypes. All prototypes
13395 the static attribute have been moved from the headers to the owning C
13398 Implemented an extract option (-e) for the AcpiBin utility (AML binary
13399 utility). This option allows the utility to extract individual ACPI
13401 from the output of AcpiDmp. It provides the same functionality of the
13402 acpixtract.pl perl script without the worry of setting the correct perl
13403 options. AcpiBin runs on Windows and has not yet been generated/validated
13405 the Linux/Unix environment (but should be soon).
13407 Updated and fixed the table dump option for AcpiBin (-d). This option
13408 converts a single ACPI table to a hex/ascii file, similar to the output
13412 Code and Data Size: Current and previous core subsystem library sizes are
13413 shown below. These are the code and data sizes for the acpica.lib
13415 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13416 any ACPI driver or OSPM code. The debug version of the code includes the
13417 debug output trace mechanism and has a much larger code and data size.
13419 that these values will vary depending on the efficiency of the compiler
13421 the compiler options used during generation.
13424 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
13425 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
13427 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
13428 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
13431 2) iASL Compiler/Disassembler:
13433 Disassembler fix: Added a check to ensure that the table length found in
13435 ACPI table header within the input file is not longer than the actual
13437 file size. This indicates some kind of file or table corruption.
13439 ----------------------------------------
13440 29 March 2005. Summary of changes for version 20050329:
13442 1) ACPI CA Core Subsystem:
13444 An error is now generated if an attempt is made to create a Buffer Field
13446 length zero (A CreateField with a length operand of zero.)
13448 The interpreter now issues a warning whenever executable code at the
13450 level is detected during ACPI table load. This will give some idea of the
13451 prevalence of this type of code.
13453 Implemented support for references to named objects (other than control
13454 methods) within package objects.
13456 Enhanced package object output for the debug object. Package objects are
13458 completely dumped, showing all elements.
13460 Enhanced miscellaneous object output for the debug object. Any object can
13461 now be written to the debug object (for example, a device object can be
13462 written, and the type of the object will be displayed.)
13464 The "static" qualifier has been added to all local functions across both
13466 core subsystem and the iASL compiler.
13468 The number of "long" lines (> 80 chars) within the source has been
13469 significantly reduced, by about 1/3.
13471 Cleaned up all header files to ensure that all CA/iASL functions are
13472 prototyped (even static functions) and the formatting is consistent.
13474 Two new header files have been added, acopcode.h and acnames.h.
13476 Removed several obsolete functions that were no longer used.
13478 Code and Data Size: Current and previous core subsystem library sizes are
13479 shown below. These are the code and data sizes for the acpica.lib
13481 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13482 any ACPI driver or OSPM code. The debug version of the code includes the
13483 debug output trace mechanism and has a much larger code and data size.
13485 that these values will vary depending on the efficiency of the compiler
13487 the compiler options used during generation.
13490 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13491 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
13493 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
13494 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
13498 2) iASL Compiler/Disassembler:
13500 Fixed a problem with the resource descriptor generation/support. For the
13501 ResourceSourceIndex and the ResourceSource fields, both must be present,
13503 both must be not present - can't have one without the other.
13505 The compiler now returns non-zero from the main procedure if any errors
13507 occurred during the compilation.
13510 ----------------------------------------
13511 09 March 2005. Summary of changes for version 20050309:
13513 1) ACPI CA Core Subsystem:
13515 The string-to-buffer implicit conversion code has been modified again
13517 a change to the ACPI specification. In order to match the behavior of
13519 other major ACPI implementation, the target buffer is no longer truncated
13521 the source string is smaller than an existing target buffer. This change
13522 requires an update to the ACPI spec, and should eliminate the recent
13523 AE_AML_BUFFER_LIMIT issues.
13525 The "implicit return" support was rewritten to a new algorithm that
13527 the general case. Rather than attempt to determine when a method is about
13529 exit, the result of every ASL operator is saved momentarily until the
13531 next ASL operator is executed. Therefore, no matter how the method exits,
13532 there will always be a saved implicit return value. This feature is only
13533 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
13535 AE_AML_NO_RETURN_VALUE errors when enabled.
13537 Implemented implicit conversion support for the predicate (operand) of
13539 If, Else, and While operators. String and Buffer arguments are
13541 converted to Integers.
13543 Changed the string-to-integer conversion behavior to match the new ACPI
13544 errata: "If no integer object exists, a new integer is created. The ASCII
13545 string is interpreted as a hexadecimal constant. Each string character is
13546 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
13547 with the first character as the most significant digit, and ending with
13549 first non-hexadecimal character or end-of-string." This means that the
13551 non-hex character terminates the conversion and this is the code that was
13554 Fixed a problem where the ObjectType operator would fail (fault) when
13556 on an Index of a Package which pointed to a null package element. The
13557 operator now properly returns zero (Uninitialized) in this case.
13559 Fixed a problem where the While operator used excessive memory by not
13560 properly popping the result stack during execution. There was no memory
13562 after execution, however. (Code provided by Valery Podrezov.)
13564 Fixed a problem where references to control methods within Package
13566 caused the method to be invoked, instead of producing a reference object
13567 pointing to the method.
13569 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
13571 improve performance and reduce code size. (Code provided by Alexey
13574 Code and Data Size: Current and previous core subsystem library sizes are
13575 shown below. These are the code and data sizes for the acpica.lib
13577 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13578 any ACPI driver or OSPM code. The debug version of the code includes the
13579 debug output trace mechanism and has a much larger code and data size.
13581 that these values will vary depending on the efficiency of the compiler
13583 the compiler options used during generation.
13586 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13587 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
13589 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13590 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
13593 2) iASL Compiler/Disassembler:
13595 Fixed a problem with the Return operator with no arguments. Since the AML
13596 grammar for the byte encoding requires an operand for the Return opcode,
13598 compiler now emits a Return(Zero) for this case. An ACPI specification
13599 update has been written for this case.
13601 For tables other than the DSDT, namepath optimization is automatically
13602 disabled. This is because SSDTs can be loaded anywhere in the namespace,
13604 compiler has no knowledge of where, and thus cannot optimize namepaths.
13606 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
13607 inadvertently omitted from the ACPI specification, and will require an
13608 update to the spec.
13610 The source file scan for ASCII characters is now optional (-a). This
13612 was made because some vendors place non-ascii characters within comments.
13613 However, the scan is simply a brute-force byte compare to ensure all
13614 characters in the file are in the range 0x00 to 0x7F.
13616 Fixed a problem with the CondRefOf operator where the compiler was
13617 inappropriately checking for the existence of the target. Since the point
13619 the operator is to check for the existence of the target at run-time, the
13620 compiler no longer checks for the target existence.
13622 Fixed a problem where errors generated from the internal AML interpreter
13623 during constant folding were not handled properly, causing a fault.
13625 Fixed a problem with overly aggressive range checking for the Stall
13626 operator. The valid range (max 255) is now only checked if the operand is
13628 type Integer. All other operand types cannot be statically checked.
13630 Fixed a problem where control method references within the RefOf,
13632 and ObjectType operators were not treated properly. They are now treated
13634 actual references, not method invocations.
13636 Fixed and enhanced the "list namespace" option (-ln). This option was
13638 a number of releases ago.
13640 Improved error handling for the Field, IndexField, and BankField
13642 The compiler now cleanly reports and recovers from errors in the field
13643 component (FieldUnit) list.
13645 Fixed a disassembler problem where the optional ResourceDescriptor fields
13646 TRS and TTP were not always handled correctly.
13648 Disassembler - Comments in output now use "//" instead of "/*"
13650 ----------------------------------------
13651 28 February 2005. Summary of changes for version 20050228:
13653 1) ACPI CA Core Subsystem:
13655 Fixed a problem where the result of an Index() operator (an object
13656 reference) must increment the reference count on the target object for
13658 life of the object reference.
13660 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
13661 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
13663 resource descriptors.
13665 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
13666 Space Descriptor" string, indicating interpreter support for the
13670 Implemented header support for the new ACPI 3.0 FADT flag bits.
13672 Implemented header support for the new ACPI 3.0 PCI Express bits for the
13674 status/enable registers.
13676 Updated header support for the MADT processor local Apic struct and MADT
13677 platform interrupt source struct for new ACPI 3.0 fields.
13679 Implemented header support for the SRAT and SLIT ACPI tables.
13681 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
13685 Code and Data Size: Current and previous core subsystem library sizes are
13686 shown below. These are the code and data sizes for the acpica.lib
13688 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13689 any ACPI driver or OSPM code. The debug version of the code includes the
13690 debug output trace mechanism and has a much larger code and data size.
13692 that these values will vary depending on the efficiency of the compiler
13694 the compiler options used during generation.
13697 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
13698 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
13700 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13701 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
13704 2) iASL Compiler/Disassembler:
13706 Fixed a problem with the internal 64-bit String-to-integer conversion
13708 strings less than two characters long.
13710 Fixed a problem with constant folding where the result of the Index()
13711 operator can not be considered a constant. This means that Index() cannot
13713 a type3 opcode and this will require an update to the ACPI specification.
13715 Disassembler: Implemented support for the TTP, MTP, and TRS resource
13716 descriptor fields. These fields were inadvertently ignored and not output
13718 the disassembly of the resource descriptor.
13721 ----------------------------------------
13722 11 February 2005. Summary of changes for version 20050211:
13724 1) ACPI CA Core Subsystem:
13726 Implemented ACPI 3.0 support for implicit conversion within the Match()
13727 operator. MatchObjects can now be of type integer, buffer, or string
13729 of just type integer. Package elements are implicitly converted to the
13731 of the MatchObject. This change aligns the behavior of Match() with the
13732 behavior of the other logical operators (LLess(), etc.) It also requires
13734 errata change to the ACPI specification as this support was intended for
13735 ACPI 3.0, but was inadvertently omitted.
13737 Fixed a problem with the internal implicit "to buffer" conversion.
13739 that are converted to buffers will cause buffer truncation if the string
13741 smaller than the target buffer. Integers that are converted to buffers
13743 not cause buffer truncation, only zero extension (both as per the ACPI
13744 spec.) The problem was introduced when code was added to truncate the
13745 buffer, but this should not be performed in all cases, only the string
13748 Fixed a problem with the Buffer and Package operators where the
13750 would get confused if two such operators were used as operands to an ASL
13751 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
13752 stack was not being popped after the execution of these operators,
13754 in an AE_NO_RETURN_VALUE exception.
13756 Fixed a problem with constructs of the form Store(Index(...),...). The
13757 reference object returned from Index was inadvertently resolved to an
13759 value. This problem was introduced in version 20050114 when the behavior
13761 Store() was modified to restrict the object types that can be used as the
13762 source operand (to match the ACPI specification.)
13764 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
13766 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
13768 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
13770 Code and Data Size: Current and previous core subsystem library sizes are
13771 shown below. These are the code and data sizes for the acpica.lib
13773 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13774 any ACPI driver or OSPM code. The debug version of the code includes the
13775 debug output trace mechanism and has a much larger code and data size.
13777 that these values will vary depending on the efficiency of the compiler
13779 the compiler options used during generation.
13782 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
13783 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
13785 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
13786 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
13789 2) iASL Compiler/Disassembler:
13791 Fixed a code generation problem in the constant folding optimization code
13792 where incorrect code was generated if a constant was reduced to a buffer
13793 object (i.e., a reduced type 5 opcode.)
13795 Fixed a typechecking problem for the ToBuffer operator. Caused by an
13796 incorrect return type in the internal opcode information table.
13798 ----------------------------------------
13799 25 January 2005. Summary of changes for version 20050125:
13801 1) ACPI CA Core Subsystem:
13803 Fixed a recently introduced problem with the Global Lock where the
13804 underlying semaphore was not created. This problem was introduced in
13805 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
13806 Acquire() operation on _GL.
13808 The local object cache is now optional, and is disabled by default. Both
13809 AcpiExec and the iASL compiler enable the cache because they run in user
13810 mode and this enhances their performance. #define
13811 ACPI_ENABLE_OBJECT_CACHE
13812 to enable the local cache.
13814 Fixed an issue in the internal function AcpiUtEvaluateObject concerning
13816 optional "implicit return" support where an error was returned if no
13818 object was expected, but one was implicitly returned. AE_OK is now
13820 in this case and the implicitly returned object is deleted.
13821 AcpiUtEvaluateObject is only occasionally used, and only to execute
13823 methods such as _STA and _INI where the return type is known up front.
13825 Fixed a few issues with the internal convert-to-integer code. It now
13827 an error if an attempt is made to convert a null string, a string of only
13828 blanks/tabs, or a zero-length buffer. This affects both implicit
13830 and explicit conversion via the ToInteger() operator.
13832 The internal debug code in AcpiUtAcquireMutex has been commented out. It
13834 not needed for normal operation and should increase the performance of
13836 entire subsystem. The code remains in case it is needed for debug
13840 The AcpiExec source and makefile are included in the Unix/Linux package
13844 Code and Data Size: Current and previous core subsystem library sizes are
13845 shown below. These are the code and data sizes for the acpica.lib
13847 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13848 any ACPI driver or OSPM code. The debug version of the code includes the
13849 debug output trace mechanism and has a much larger code and data size.
13851 that these values will vary depending on the efficiency of the compiler
13853 the compiler options used during generation.
13856 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
13857 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
13859 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
13860 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
13862 2) iASL Compiler/Disassembler:
13864 Switch/Case support: A warning is now issued if the type of the Switch
13866 cannot be determined at compile time. For example, Switch(Arg0) will
13867 generate the warning, and the type is assumed to be an integer. As per
13869 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
13873 Switch/Case support: Implemented support for buffer and string objects as
13874 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
13875 buffers and strings.
13877 Switch/Case support: The emitted code for the LEqual() comparisons now
13879 the switch value as the first operand, not the second. The case value is
13881 the second operand, and this allows the case value to be implicitly
13882 converted to the type of the switch value, not the other way around.
13884 Switch/Case support: Temporary variables are now emitted immediately
13886 the control method, not at the global level. This means that there are
13888 36 temps available per-method, not 36 temps per-module as was the case
13890 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
13892 ----------------------------------------
13893 14 January 2005. Summary of changes for version 20050114:
13895 Added 2005 copyright to all module headers. This affects every module in
13896 the core subsystem, iASL compiler, and the utilities.
13898 1) ACPI CA Core Subsystem:
13900 Fixed an issue with the String-to-Buffer conversion code where the string
13901 null terminator was not included in the buffer after conversion, but
13903 is existing ASL that assumes the string null terminator is included. This
13905 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
13906 introduced in the previous version when the code was updated to correctly
13907 set the converted buffer size as per the ACPI specification. The ACPI
13909 is ambiguous and will be updated to specify that the null terminator must
13911 included in the converted buffer. This also affects the ToBuffer() ASL
13914 Fixed a problem with the Mid() ASL/AML operator where it did not work
13915 correctly on Buffer objects. Newly created sub-buffers were not being
13920 Fixed a problem in AcpiTbFindTable where incorrect string compares were
13921 performed on the OemId and OemTableId table header fields. These fields
13923 not null terminated, so strncmp is now used instead of strcmp.
13925 Implemented a restriction on the Store() ASL/AML operator to align the
13926 behavior with the ACPI specification. Previously, any object could be
13928 as the source operand. Now, the only objects that may be used are
13930 Buffers, Strings, Packages, Object References, and DDB Handles. If
13931 necessary, the original behavior can be restored by enabling the
13932 EnableInterpreterSlack flag.
13934 Enhanced the optional "implicit return" support to allow an implicit
13936 value from methods that are invoked externally via the AcpiEvaluateObject
13937 interface. This enables implicit returns from the _STA and _INI methods,
13940 Changed the Revision() ASL/AML operator to return the current version of
13942 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
13944 the supported ACPI version (This is the function of the _REV method).
13946 Updated the _REV predefined method to return the currently supported
13950 Implemented batch mode option for the AcpiExec utility (-b).
13952 Code and Data Size: Current and previous core subsystem library sizes are
13953 shown below. These are the code and data sizes for the acpica.lib
13955 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13956 any ACPI driver or OSPM code. The debug version of the code includes the
13957 debug output trace mechanism and has a much larger code and data size.
13959 that these values will vary depending on the efficiency of the compiler
13961 the compiler options used during generation.
13964 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13965 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
13967 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
13968 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
13970 ----------------------------------------
13971 10 December 2004. Summary of changes for version 20041210:
13973 ACPI 3.0 support is nearing completion in both the iASL compiler and the
13974 ACPI CA core subsystem.
13976 1) ACPI CA Core Subsystem:
13978 Fixed a problem in the ToDecimalString operator where the resulting
13980 length was incorrectly calculated. The length is now calculated exactly,
13981 eliminating incorrect AE_STRING_LIMIT exceptions.
13983 Fixed a problem in the ToHexString operator to allow a maximum 200
13985 string to be produced.
13987 Fixed a problem in the internal string-to-buffer and buffer-to-buffer
13989 routine where the length of the resulting buffer was not truncated to the
13990 new size (if the target buffer already existed).
13992 Code and Data Size: Current and previous core subsystem library sizes are
13993 shown below. These are the code and data sizes for the acpica.lib
13995 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13996 any ACPI driver or OSPM code. The debug version of the code includes the
13997 debug output trace mechanism and has a much larger code and data size.
13999 that these values will vary depending on the efficiency of the compiler
14001 the compiler options used during generation.
14004 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
14005 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
14007 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
14008 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
14011 2) iASL Compiler/Disassembler:
14013 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
14014 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
14015 Includes support in the disassembler.
14017 Implemented support for the new (ACPI 3.0) parameter to the Register
14021 Fixed a problem where the _HE resource name for the Interrupt macro was
14022 referencing bit 0 instead of bit 1.
14024 Implemented check for maximum 255 interrupts in the Interrupt macro.
14026 Fixed a problem with the predefined resource descriptor names where
14027 incorrect AML code was generated if the offset within the resource buffer
14028 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
14029 but did not update the surrounding package lengths.
14031 Changes to the Dma macro: All channels within the channel list must be
14033 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
14034 optional (default is BusMaster).
14036 Implemented check for maximum 7 data bytes for the VendorShort macro.
14038 The ReadWrite parameter is now optional for the Memory32 and similar
14041 ----------------------------------------
14042 03 December 2004. Summary of changes for version 20041203:
14044 1) ACPI CA Core Subsystem:
14046 The low-level field insertion/extraction code (exfldio) has been
14048 rewritten to eliminate unnecessary complexity, bugs, and boundary
14051 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
14053 operators where the input operand could be inadvertently deleted if no
14054 conversion was necessary (e.g., if the input to ToInteger was an Integer
14057 Fixed a problem with the ToDecimalString and ToHexString where an
14059 exception code was returned if the resulting string would be > 200 chars.
14060 AE_STRING_LIMIT is now returned.
14062 Fixed a problem with the Concatenate operator where AE_OK was always
14063 returned, even if the operation failed.
14065 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
14066 semaphores to be allocated.
14068 Code and Data Size: Current and previous core subsystem library sizes are
14069 shown below. These are the code and data sizes for the acpica.lib
14071 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14072 any ACPI driver or OSPM code. The debug version of the code includes the
14073 debug output trace mechanism and has a much larger code and data size.
14075 that these values will vary depending on the efficiency of the compiler
14077 the compiler options used during generation.
14080 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
14081 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
14083 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
14084 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
14087 2) iASL Compiler/Disassembler:
14089 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
14090 recently introduced in 20041119.
14092 Fixed a problem with the ToUUID macro where the upper nybble of each
14094 byte was inadvertently set to zero.
14096 ----------------------------------------
14097 19 November 2004. Summary of changes for version 20041119:
14099 1) ACPI CA Core Subsystem:
14101 Fixed a problem in the internal ConvertToInteger routine where new
14103 were not truncated to 32 bits for 32-bit ACPI tables. This routine
14105 buffers and strings to integers.
14107 Implemented support to store a value to an Index() on a String object.
14109 is an ACPI 2.0 feature that had not yet been implemented.
14111 Implemented new behavior for storing objects to individual package
14113 (via the Index() operator). The previous behavior was to invoke the
14115 conversion rules if an object was already present at the index. The new
14116 behavior is to simply delete any existing object and directly store the
14118 object. Although the ACPI specification seems unclear on this subject,
14120 ACPI implementations behave in this manner. (This is the root of the
14121 AE_BAD_HEX_CONSTANT issue.)
14123 Modified the RSDP memory scan mechanism to support the extended checksum
14125 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
14126 RSDP signature is found with a valid checksum.
14128 Code and Data Size: Current and previous core subsystem library sizes are
14129 shown below. These are the code and data sizes for the acpica.lib
14131 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14132 any ACPI driver or OSPM code. The debug version of the code includes the
14133 debug output trace mechanism and has a much larger code and data size.
14135 that these values will vary depending on the efficiency of the compiler
14137 the compiler options used during generation.
14140 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
14141 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
14143 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
14144 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
14147 2) iASL Compiler/Disassembler:
14149 Fixed a missing semicolon in the aslcompiler.y file.
14151 ----------------------------------------
14152 05 November 2004. Summary of changes for version 20041105:
14154 1) ACPI CA Core Subsystem:
14156 Implemented support for FADT revision 2. This was an interim table
14158 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
14160 Implemented optional support to allow uninitialized LocalX and ArgX
14161 variables in a control method. The variables are initialized to an
14163 object with a value of zero. This support is enabled by setting the
14164 AcpiGbl_EnableInterpreterSlack flag to TRUE.
14166 Implemented support for Integer objects for the SizeOf operator. Either
14168 or 8 is returned, depending on the current integer size (32-bit or 64-
14170 depending on the parent table revision).
14172 Fixed a problem in the implementation of the SizeOf and ObjectType
14174 where the operand was resolved to a value too early, causing incorrect
14175 return values for some objects.
14177 Fixed some possible memory leaks during exceptional conditions.
14179 Code and Data Size: Current and previous core subsystem library sizes are
14180 shown below. These are the code and data sizes for the acpica.lib
14182 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14183 any ACPI driver or OSPM code. The debug version of the code includes the
14184 debug output trace mechanism and has a much larger code and data size.
14186 that these values will vary depending on the efficiency of the compiler
14188 the compiler options used during generation.
14191 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
14192 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
14194 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
14195 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
14198 2) iASL Compiler/Disassembler:
14200 Implemented support for all ACPI 3.0 reserved names and methods.
14202 Implemented all ACPI 3.0 grammar elements in the front-end, including
14203 support for semicolons.
14205 Implemented the ACPI 3.0 Function() and ToUUID() macros
14207 Fixed a problem in the disassembler where a Scope() operator would not be
14208 emitted properly if the target of the scope was in another table.
14210 ----------------------------------------
14211 15 October 2004. Summary of changes for version 20041015:
14213 Note: ACPI CA is currently undergoing an in-depth and complete formal
14214 evaluation to test/verify the following areas. Other suggestions are
14215 welcome. This will result in an increase in the frequency of releases and
14216 the number of bug fixes in the next few months.
14217 - Functional tests for all ASL/AML operators
14218 - All implicit/explicit type conversions
14219 - Bit fields and operation regions
14220 - 64-bit math support and 32-bit-only "truncated" math support
14221 - Exceptional conditions, both compiler and interpreter
14222 - Dynamic object deletion and memory leaks
14223 - ACPI 3.0 support when implemented
14224 - External interfaces to the ACPI subsystem
14227 1) ACPI CA Core Subsystem:
14229 Fixed two alignment issues on 64-bit platforms - within debug statements
14231 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
14233 field within the non-aligned ACPI generic address structure.
14235 Fixed a problem in the Increment and Decrement operators where incorrect
14236 operand resolution could result in the inadvertent modification of the
14237 original integer when the integer is passed into another method as an
14238 argument and the arg is then incremented/decremented.
14240 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
14242 BCD number were truncated during conversion.
14244 Fixed a problem in the ToDecimal operator where the length of the
14246 string could be set incorrectly too long if the input operand was a
14250 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
14252 within a buffer would prematurely terminate a compare between buffer
14255 Added a check for string overflow (>200 characters as per the ACPI
14256 specification) during the Concatenate operator with two string operands.
14258 Code and Data Size: Current and previous core subsystem library sizes are
14259 shown below. These are the code and data sizes for the acpica.lib
14261 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14262 any ACPI driver or OSPM code. The debug version of the code includes the
14263 debug output trace mechanism and has a much larger code and data size.
14265 that these values will vary depending on the efficiency of the compiler
14267 the compiler options used during generation.
14270 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
14271 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
14273 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
14274 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
14278 2) iASL Compiler/Disassembler:
14280 Allow the use of the ObjectType operator on uninitialized Locals and Args
14281 (returns 0 as per the ACPI specification).
14283 Fixed a problem where the compiler would fault if there was a syntax
14285 in the FieldName of all of the various CreateXXXField operators.
14287 Disallow the use of lower case letters within the EISAID macro, as per
14289 ACPI specification. All EISAID strings must be of the form "UUUNNNN"
14291 U is an uppercase letter and N is a hex digit.
14294 ----------------------------------------
14295 06 October 2004. Summary of changes for version 20041006:
14297 1) ACPI CA Core Subsystem:
14299 Implemented support for the ACPI 3.0 Timer operator. This ASL function
14300 implements a 64-bit timer with 100 nanosecond granularity.
14302 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
14303 implement the ACPI 3.0 Timer operator. This allows the host OS to
14305 the timer with the best clock available. Also, it keeps the core
14307 out of the clock handling business, since the host OS (usually) performs
14310 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
14311 functions use a 64-bit address which is part of the packed ACPI Generic
14312 Address Structure. Since the structure is non-aligned, the alignment
14314 are now used to extract the address to a local variable before use.
14316 Fixed a problem where the ToInteger operator assumed all input strings
14318 hexadecimal. The operator now handles both decimal strings and hex
14320 (prefixed with "0x").
14322 Fixed a problem where the string length in the string object created as a
14323 result of the internal ConvertToString procedure could be incorrect. This
14324 potentially affected all implicit conversions and also the
14326 and ToHexString operators.
14328 Fixed two problems in the ToString operator. If the length parameter was
14329 zero, an incorrect string object was created and the value of the input
14330 length parameter was inadvertently changed from zero to Ones.
14332 Fixed a problem where the optional ResourceSource string in the
14334 resource macro was ignored.
14336 Simplified the interfaces to the internal division functions, reducing
14338 size and complexity.
14340 Code and Data Size: Current and previous core subsystem library sizes are
14341 shown below. These are the code and data sizes for the acpica.lib
14343 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14344 any ACPI driver or OSPM code. The debug version of the code includes the
14345 debug output trace mechanism and has a much larger code and data size.
14347 that these values will vary depending on the efficiency of the compiler
14349 the compiler options used during generation.
14352 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
14353 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
14355 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
14356 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
14359 2) iASL Compiler/Disassembler:
14361 Implemented support for the ACPI 3.0 Timer operator.
14363 Fixed a problem where the Default() operator was inadvertently ignored in
14365 Switch/Case block. This was a problem in the translation of the Switch
14366 statement to If...Else pairs.
14368 Added support to allow a standalone Return operator, with no parentheses
14372 Fixed a problem with code generation for the ElseIf operator where the
14373 translated Else...If parse tree was improperly constructed leading to the
14376 ----------------------------------------
14377 22 September 2004. Summary of changes for version 20040922:
14379 1) ACPI CA Core Subsystem:
14381 Fixed a problem with the implementation of the LNot() operator where
14383 was not returned for the TRUE case. Changed the code to return Ones
14385 of (!Arg) which was usually 1. This change affects iASL constant folding
14387 this operator also.
14389 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was
14391 initialized properly -- Now zero the entire buffer in this case where the
14392 buffer already exists.
14394 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
14395 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
14396 related code considerably. This will require changes/updates to all OS
14397 interface layers (OSLs.)
14399 Implemented a new external interface, AcpiInstallExceptionHandler, to
14401 a system exception handler to be installed. This handler is invoked upon
14403 run-time exception that occurs during control method execution.
14405 Added support for the DSDT in AcpiTbFindTable. This allows the
14406 DataTableRegion() operator to access the local copy of the DSDT.
14408 Code and Data Size: Current and previous core subsystem library sizes are
14409 shown below. These are the code and data sizes for the acpica.lib
14411 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14412 any ACPI driver or OSPM code. The debug version of the code includes the
14413 debug output trace mechanism and has a much larger code and data size.
14415 that these values will vary depending on the efficiency of the compiler
14417 the compiler options used during generation.
14420 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
14421 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
14423 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
14424 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
14427 2) iASL Compiler/Disassembler:
14429 Fixed a problem with constant folding and the LNot operator. LNot was
14430 returning 1 in the TRUE case, not Ones as per the ACPI specification.
14432 could result in the generation of an incorrect folded/reduced constant.
14434 End-Of-File is now allowed within a "//"-style comment. A parse error no
14435 longer occurs if such a comment is at the very end of the input ASL
14439 Implemented the "-r" option to override the Revision in the table header.
14440 The initial use of this option will be to simplify the evaluation of the
14442 interpreter by allowing a single ASL source module to be compiled for
14444 32-bit or 64-bit integers.
14447 ----------------------------------------
14448 27 August 2004. Summary of changes for version 20040827:
14450 1) ACPI CA Core Subsystem:
14452 - Implemented support for implicit object conversion in the non-numeric
14453 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual,
14455 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
14456 the second operand is implicitly converted on the fly to match the type
14458 the first operand. For example:
14460 LEqual (Source1, Source2)
14462 Source1 and Source2 must each evaluate to an integer, a string, or a
14464 The data type of Source1 dictates the required type of Source2. Source2
14466 implicitly converted if necessary to match the type of Source1.
14468 - Updated and corrected the behavior of the string conversion support.
14470 rules concerning conversion of buffers to strings (according to the ACPI
14471 specification) are as follows:
14473 ToDecimalString - explicit byte-wise conversion of buffer to string of
14474 decimal values (0-255) separated by commas. ToHexString - explicit byte-
14476 conversion of buffer to string of hex values (0-FF) separated by commas.
14477 ToString - explicit byte-wise conversion of buffer to string. Byte-by-
14479 copy with no transform except NULL terminated. Any other implicit buffer-
14481 string conversion - byte-wise conversion of buffer to string of hex
14483 (0-FF) separated by spaces.
14485 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
14487 - Fixed a problem in AcpiNsGetPathnameLength where the returned length
14489 one byte too short in the case of a node in the root scope. This could
14490 cause a fault during debug output.
14492 - Code and Data Size: Current and previous core subsystem library sizes
14494 shown below. These are the code and data sizes for the acpica.lib
14496 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14497 any ACPI driver or OSPM code. The debug version of the code includes the
14498 debug output trace mechanism and has a much larger code and data size.
14500 that these values will vary depending on the efficiency of the compiler
14502 the compiler options used during generation.
14505 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
14506 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
14508 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
14509 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
14512 2) iASL Compiler/Disassembler:
14514 - Fixed a Linux generation error.
14517 ----------------------------------------
14518 16 August 2004. Summary of changes for version 20040816:
14520 1) ACPI CA Core Subsystem:
14522 Designed and implemented support within the AML interpreter for the so-
14523 called "implicit return". This support returns the result of the last
14525 operation within a control method, in the absence of an explicit Return()
14526 operator. A few machines depend on this behavior, even though it is not
14527 explicitly supported by the ASL language. It is optional support that
14529 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
14531 Removed support for the PCI_Config address space from the internal low
14533 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
14534 support was not used internally, and would not work correctly anyway
14536 the PCI bus number and segment number were not supported. There are
14537 separate interfaces for PCI configuration space access because of the
14541 Code and Data Size: Current and previous core subsystem library sizes are
14542 shown below. These are the code and data sizes for the acpica.lib
14544 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14545 any ACPI driver or OSPM code. The debug version of the code includes the
14546 debug output trace mechanism and has a much larger code and data size.
14548 that these values will vary depending on the efficiency of the compiler
14550 the compiler options used during generation.
14553 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
14554 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
14556 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
14557 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
14560 2) iASL Compiler/Disassembler:
14562 Fixed a problem where constants in ASL expressions at the root level (not
14563 within a control method) could be inadvertently truncated during code
14564 generation. This problem was introduced in the 20040715 release.
14567 ----------------------------------------
14568 15 July 2004. Summary of changes for version 20040715:
14570 1) ACPI CA Core Subsystem:
14572 Restructured the internal HW GPE interfaces to pass/track the current
14574 of interrupts (enabled/disabled) in order to avoid possible deadlock and
14575 increase flexibility of the interfaces.
14577 Implemented a "lexicographical compare" for String and Buffer objects
14579 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual -
14581 as per further clarification to the ACPI specification. Behavior is
14583 to C library "strcmp".
14585 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
14586 external function. In the 32-bit non-debug case, the stack use has been
14587 reduced from 168 bytes to 32 bytes.
14589 Deployed a new run-time configuration flag,
14590 AcpiGbl_EnableInterpreterSlack,
14591 whose purpose is to allow the AML interpreter to forgive certain bad AML
14592 constructs. Default setting is FALSE.
14594 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field
14596 support code. If enabled, it allows field access to go beyond the end of
14598 region definition if the field is within the region length rounded up to
14600 next access width boundary (a common coding error.)
14602 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
14603 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also,
14605 symbols are lowercase by the latest version of the AcpiSrc tool.
14607 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
14608 rename "Register" to simply "Reg" to prevent certain compilers from
14611 Code and Data Size: Current and previous core subsystem library sizes are
14612 shown below. These are the code and data sizes for the acpica.lib
14614 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14615 any ACPI driver or OSPM code. The debug version of the code includes the
14616 debug output trace mechanism and has a much larger code and data size.
14618 that these values will vary depending on the efficiency of the compiler
14620 the compiler options used during generation.
14623 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
14624 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
14626 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
14627 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
14630 2) iASL Compiler/Disassembler:
14632 Implemented full support for Package objects within the Case() operator.
14633 Note: The Break() operator is currently not supported within Case blocks
14634 (TermLists) as there is some question about backward compatibility with
14639 Fixed a problem where complex terms were not supported properly within
14643 Eliminated extraneous warning for compiler-emitted reserved names of the
14644 form "_T_x". (Used in Switch/Case operators.)
14646 Eliminated optimization messages for "_T_x" objects and small constants
14647 within the DefinitionBlock operator.
14650 ----------------------------------------
14651 15 June 2004. Summary of changes for version 20040615:
14653 1) ACPI CA Core Subsystem:
14655 Implemented support for Buffer and String objects (as per ACPI 2.0) for
14657 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
14660 All directory names in the entire source package are lower case, as they
14661 were in earlier releases.
14663 Implemented "Disassemble" command in the AML debugger that will
14665 a single control method.
14667 Code and Data Size: Current and previous core subsystem library sizes are
14668 shown below. These are the code and data sizes for the acpica.lib
14670 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14671 any ACPI driver or OSPM code. The debug version of the code includes the
14672 debug output trace mechanism and has a much larger code and data size.
14674 that these values will vary depending on the efficiency of the compiler
14676 the compiler options used during generation.
14679 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
14680 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
14683 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
14684 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
14687 2) iASL Compiler/Disassembler:
14689 Implemented support for Buffer and String objects (as per ACPI 2.0) for
14691 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
14694 All directory names in the entire source package are lower case, as they
14695 were in earlier releases.
14697 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
14700 Fixed an issue with the Windows version of the compiler where later
14702 of Windows place the FADT in the registry under the name "FADT" and not
14703 "FACP" as earlier versions did. This applies when using the -g or -
14704 d<nofilename> options. The compiler now looks for both strings as
14707 Fixed a problem with compiler namepath optimization where a namepath
14709 the Scope() operator could not be optimized if the namepath was a subpath
14711 the current scope path.
14713 ----------------------------------------
14714 27 May 2004. Summary of changes for version 20040527:
14716 1) ACPI CA Core Subsystem:
14718 Completed a new design and implementation for EBDA (Extended BIOS Data
14720 support in the RSDP scan code. The original code improperly scanned for
14722 EBDA by simply scanning from memory location 0 to 0x400. The correct
14724 is to first obtain the EBDA pointer from within the BIOS data area, then
14725 scan 1K of memory starting at the EBDA pointer. There appear to be few
14727 any machines that place the RSDP in the EBDA, however.
14729 Integrated a fix for a possible fault during evaluation of BufferField
14730 arguments. Obsolete code that was causing the problem was removed.
14732 Found and fixed a problem in the Field Support Code where data could be
14733 corrupted on a bit field read that starts on an aligned boundary but does
14734 not end on an aligned boundary. Merged the read/write "datum length"
14735 calculation code into a common procedure.
14737 Rolled in a couple of changes to the FreeBSD-specific header.
14740 Code and Data Size: Current and previous core subsystem library sizes are
14741 shown below. These are the code and data sizes for the acpica.lib
14743 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14744 any ACPI driver or OSPM code. The debug version of the code includes the
14745 debug output trace mechanism and has a much larger code and data size.
14747 that these values will vary depending on the efficiency of the compiler
14749 the compiler options used during generation.
14752 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14753 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
14755 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
14756 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
14759 2) iASL Compiler/Disassembler:
14761 Fixed a generation warning produced by some overly-verbose compilers for
14765 ----------------------------------------
14766 14 May 2004. Summary of changes for version 20040514:
14768 1) ACPI CA Core Subsystem:
14770 Fixed a problem where hardware GPE enable bits sometimes not set properly
14771 during and after GPE method execution. Result of 04/27 changes.
14773 Removed extra "clear all GPEs" when sleeping/waking.
14775 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
14776 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above
14778 the new AcpiEv* calls as appropriate.
14780 ACPI_OS_NAME was removed from the OS-specific headers. The default name
14782 now "Microsoft Windows NT" for maximum compatibility. However this can
14784 changed by modifying the acconfig.h file.
14786 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
14787 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
14789 Run _INI methods on ThermalZone objects. This is against the ACPI
14790 specification, but there is apparently ASL code in the field that has
14792 _INI methods, and apparently "other" AML interpreters execute them.
14794 Performed a full 16/32/64 bit lint that resulted in some small changes.
14796 Added a sleep simulation command to the AML debugger to test sleep code.
14798 Code and Data Size: Current and previous core subsystem library sizes are
14799 shown below. These are the code and data sizes for the acpica.lib
14801 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14802 any ACPI driver or OSPM code. The debug version of the code includes the
14803 debug output trace mechanism and has a much larger code and data size.
14805 that these values will vary depending on the efficiency of the compiler
14807 the compiler options used during generation.
14810 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14811 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
14813 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14814 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
14816 ----------------------------------------
14817 27 April 2004. Summary of changes for version 20040427:
14819 1) ACPI CA Core Subsystem:
14821 Completed a major overhaul of the GPE handling within ACPI CA. There are
14822 now three types of GPEs: wake-only, runtime-only, and combination
14824 The only GPEs allowed to be combination wake/run are for button-style
14825 devices such as a control-method power button, control-method sleep
14827 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are
14829 referenced by any _PRW methods are marked for "runtime" and hardware
14830 enabled. Any GPE that is referenced by a _PRW method is marked for
14832 (and disabled at runtime). However, at sleep time, only those GPEs that
14833 have been specifically enabled for wake via the AcpiEnableGpe interface
14835 actually be hardware enabled.
14837 A new external interface has been added, AcpiSetGpeType(), that is meant
14839 be used by device drivers to force a GPE to a particular type. It will
14841 especially useful for the drivers for the button devices mentioned above.
14843 Completed restructuring of the ACPI CA initialization sequence so that
14844 default operation region handlers are installed before GPEs are
14846 and the _PRW methods are executed. This will prevent errors when the
14848 methods attempt to access system memory or I/O space.
14850 GPE enable/disable no longer reads the GPE enable register. We now keep
14852 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
14853 thus no longer depend on the hardware to maintain these bits.
14855 Always clear the wake status and fixed/GPE status bits before sleep, even
14858 Improved the AML debugger output for displaying the GPE blocks and their
14861 Added new strings for the _OSI method, of the form "Windows 2001 SPx"
14865 Fixed a problem where the physical address was incorrectly calculated
14867 the Load() operator was used to directly load from an Operation Region
14869 loading from a Field object.) Also added check for minimum table length
14873 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
14876 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
14877 consistency with the other fields returned.
14879 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
14880 structure for each GPE in the system, so the size of this structure is
14883 CPU stack requirement reduction: Cleaned up the method execution and
14885 evaluation paths so that now a parameter structure is passed, instead of
14886 copying the various method parameters over and over again.
14888 In evregion.c: Correctly exit and reenter the interpreter region if and
14889 only if dispatching an operation region request to a user-installed
14891 Do not exit/reenter when dispatching to a default handler (e.g., default
14892 system memory or I/O handlers)
14895 Notes for updating drivers for the new GPE support. The following
14897 must be made to ACPI-related device drivers that are attached to one or
14899 GPEs: (This information will be added to the ACPI CA Programmer
14902 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you
14904 explicitly call AcpiEnableGpe.
14905 2) There is a new interface called AcpiSetGpeType. This should be called
14906 before enabling the GPE. Also, this interface will automatically disable
14907 the GPE if it is currently enabled.
14908 3) AcpiEnableGpe no longer supports a GPE type flag.
14910 Specific drivers that must be changed:
14912 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
14913 AeGpeHandler, NULL);
14914 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
14915 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
14917 2) Button Drivers (Power, Lid, Sleep):
14918 Run _PRW method under parent device
14919 If _PRW exists: /* This is a control-method button */
14920 Extract GPE number and possibly GpeDevice
14921 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
14922 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
14924 For all other devices that have _PRWs, we automatically set the GPE type
14926 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled.
14928 must be done on a selective basis, usually requiring some kind of user
14930 to allow the user to pick the wake devices.
14933 Code and Data Size: Current and previous core subsystem library sizes are
14934 shown below. These are the code and data sizes for the acpica.lib
14936 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14937 any ACPI driver or OSPM code. The debug version of the code includes the
14938 debug output trace mechanism and has a much larger code and data size.
14940 that these values will vary depending on the efficiency of the compiler
14942 the compiler options used during generation.
14945 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
14946 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
14949 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14950 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
14954 ----------------------------------------
14955 02 April 2004. Summary of changes for version 20040402:
14957 1) ACPI CA Core Subsystem:
14959 Fixed an interpreter problem where an indirect store through an ArgX
14960 parameter was incorrectly applying the "implicit conversion rules" during
14961 the store. From the ACPI specification: "If the target is a method local
14963 argument (LocalX or ArgX), no conversion is performed and the result is
14964 stored directly to the target". The new behavior is to disable implicit
14965 conversion during ALL stores to an ArgX.
14967 Changed the behavior of the _PRW method scan to ignore any and all errors
14968 returned by a given _PRW. This prevents the scan from aborting from the
14969 failure of any single _PRW.
14971 Moved the runtime configuration parameters from the global init procedure
14973 static variables in acglobal.h. This will allow the host to override the
14974 default values easily.
14976 Code and Data Size: Current and previous core subsystem library sizes are
14977 shown below. These are the code and data sizes for the acpica.lib
14979 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14980 any ACPI driver or OSPM code. The debug version of the code includes the
14981 debug output trace mechanism and has a much larger code and data size.
14983 that these values will vary depending on the efficiency of the compiler
14985 the compiler options used during generation.
14988 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
14989 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
14991 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
14992 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
14995 2) iASL Compiler/Disassembler:
14997 iASL now fully disassembles SSDTs. However, External() statements are
14999 generated automatically for unresolved symbols at this time. This is a
15000 planned feature for future implementation.
15002 Fixed a scoping problem in the disassembler that occurs when the type of
15004 target of a Scope() operator is overridden. This problem caused an
15005 incorrectly nested internal namespace to be constructed.
15007 Any warnings or errors that are emitted during disassembly are now
15009 out automatically so that the resulting file can be recompiled without
15013 ----------------------------------------
15014 26 March 2004. Summary of changes for version 20040326:
15016 1) ACPI CA Core Subsystem:
15018 Implemented support for "wake" GPEs via interaction between GPEs and the
15019 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
15020 identified as a WAKE GPE and by default will no longer be enabled at
15021 runtime. Previously, we were blindly enabling all GPEs with a
15023 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.
15025 believe this has been the cause of thousands of "spurious" GPEs on some
15028 This new GPE behavior is can be reverted to the original behavior (enable
15029 ALL GPEs at runtime) via a runtime flag.
15031 Fixed a problem where aliased control methods could not access objects
15032 properly. The proper scope within the namespace was not initialized
15033 (transferred to the target of the aliased method) before executing the
15036 Fixed a potential race condition on internal object deletion on the
15038 object in AcpiEvaluateObject.
15040 Integrated a fix for resource descriptors where both _MEM and _MTP were
15041 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
15042 wide, 0x0F instead of 0x03.)
15044 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName,
15047 fault in some cases.
15049 Updated Notify() values for debug statements in evmisc.c
15051 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
15053 Code and Data Size: Current and previous core subsystem library sizes are
15054 shown below. These are the code and data sizes for the acpica.lib
15056 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
15057 any ACPI driver or OSPM code. The debug version of the code includes the
15058 debug output trace mechanism and has a much larger code and data size.
15060 that these values will vary depending on the efficiency of the compiler
15062 the compiler options used during generation.
15066 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
15067 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
15069 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
15070 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
15072 ----------------------------------------
15073 11 March 2004. Summary of changes for version 20040311:
15075 1) ACPI CA Core Subsystem:
15077 Fixed a problem where errors occurring during the parse phase of control
15078 method execution did not abort cleanly. For example, objects created and
15079 installed in the namespace were not deleted. This caused all subsequent
15080 invocations of the method to return the AE_ALREADY_EXISTS exception.
15082 Implemented a mechanism to force a control method to "Serialized"
15084 if the method attempts to create namespace objects. (The root of the
15085 AE_ALREADY_EXISTS problem.)
15087 Implemented support for the predefined _OSI "internal" control method.
15088 Initial supported strings are "Linux", "Windows 2000", "Windows 2001",
15090 "Windows 2001.1", and can be easily upgraded for new strings as
15092 This feature will allow "other" operating systems to execute the fully
15093 tested, "Windows" code path through the ASL code
15095 Global Lock Support: Now allows multiple acquires and releases with any
15096 internal thread. Removed concept of "owning thread" for this special
15099 Fixed two functions that were inappropriately declaring large objects on
15101 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage
15103 method execution considerably.
15105 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
15106 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
15108 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
15109 defined on the machine.
15111 Implemented two runtime options: One to force all control method
15113 to "Serialized" to mimic Windows behavior, another to disable _OSI
15115 if it causes problems on a given machine.
15117 Code and Data Size: Current and previous core subsystem library sizes are
15118 shown below. These are the code and data sizes for the acpica.lib
15120 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
15121 any ACPI driver or OSPM code. The debug version of the code includes the
15122 debug output trace mechanism and has a much larger code and data size.
15124 that these values will vary depending on the efficiency of the compiler
15126 the compiler options used during generation.
15129 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
15130 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
15132 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
15133 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
15135 2) iASL Compiler/Disassembler:
15137 Fixed an array size problem for FreeBSD that would cause the compiler to
15140 ----------------------------------------
15141 20 February 2004. Summary of changes for version 20040220:
15144 1) ACPI CA Core Subsystem:
15146 Implemented execution of _SxD methods for Device objects in the
15147 GetObjectInfo interface.
15149 Fixed calls to _SST method to pass the correct arguments.
15151 Added a call to _SST on wake to restore to "working" state.
15153 Check for End-Of-Buffer failure case in the WalkResources interface.
15155 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
15156 structures to the beginning of the file.
15158 After wake, clear GPE status register(s) before enabling GPEs.
15160 After wake, clear/enable power button. (Perhaps we should clear/enable
15162 fixed events upon wake.)
15164 Fixed a couple of possible memory leaks in the Namespace manager.
15166 Integrated latest acnetbsd.h file.
15168 ----------------------------------------
15169 11 February 2004. Summary of changes for version 20040211:
15172 1) ACPI CA Core Subsystem:
15174 Completed investigation and implementation of the call-by-reference
15175 mechanism for control method arguments.
15177 Fixed a problem where a store of an object into an indexed package could
15178 fail if the store occurs within a different method than the method that
15179 created the package.
15181 Fixed a problem where the ToDecimal operator could return incorrect
15184 Fixed a problem where the CopyObject operator could fail on some of the
15186 obscure objects (e.g., Reference objects.)
15188 Improved the output of the Debug object to display buffer, package, and
15191 Fixed a problem where constructs of the form "RefOf (ArgX)" did not
15193 the expected result.
15195 Added permanent ACPI_REPORT_ERROR macros for all instances of the
15196 ACPI_AML_INTERNAL exception.
15198 Integrated latest version of acfreebsd.h
15200 ----------------------------------------
15201 16 January 2004. Summary of changes for version 20040116:
15203 The purpose of this release is primarily to update the copyright years in
15204 each module, thus causing a huge number of diffs. There are a few small
15205 functional changes, however.
15207 1) ACPI CA Core Subsystem:
15209 Improved error messages when there is a problem finding one or more of
15211 required base ACPI tables
15213 Reintroduced the definition of APIC_HEADER in actbl.h
15215 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
15217 Removed extraneous reference to NewObj in dsmthdat.c
15221 Fixed a problem introduced in December that disabled the correct
15223 of Resource Templates
15226 ----------------------------------------
15227 03 December 2003. Summary of changes for version 20031203:
15229 1) ACPI CA Core Subsystem:
15231 Changed the initialization of Operation Regions during subsystem
15232 init to perform two entire walks of the ACPI namespace; The first
15233 to initialize the regions themselves, the second to execute the
15234 _REG methods. This fixed some interdependencies across _REG
15235 methods found on some machines.
15237 Fixed a problem where a Store(Local0, Local1) could simply update
15238 the object reference count, and not create a new copy of the
15239 object if the Local1 is uninitialized.
15241 Implemented support for the _SST reserved method during sleep
15244 Implemented support to clear the SLP_TYP and SLP_EN bits when
15245 waking up, this is apparently required by some machines.
15247 When sleeping, clear the wake status only if SleepState is not S5.
15249 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
15250 pointer arithmetic advanced a string pointer too far.
15252 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
15253 could be returned if the requested table has not been loaded.
15255 Within the support for IRQ resources, restructured the handling of
15256 the active and edge/level bits.
15258 Fixed a few problems in AcpiPsxExecute() where memory could be
15259 leaked under certain error conditions.
15261 Improved error messages for the cases where the ACPI mode could
15264 Code and Data Size: Current and previous core subsystem library
15265 sizes are shown below. These are the code and data sizes for the
15266 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
15267 these values do not include any ACPI driver or OSPM code. The
15268 debug version of the code includes the debug output trace
15269 mechanism and has a much larger code and data size. Note that
15270 these values will vary depending on the efficiency of the compiler
15271 and the compiler options used during generation.
15273 Previous Release (20031029):
15274 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
15275 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
15277 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
15278 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
15280 2) iASL Compiler/Disassembler:
15282 Implemented a fix for the iASL disassembler where a bad index was
15283 generated. This was most noticeable on 64-bit platforms
15286 ----------------------------------------
15287 29 October 2003. Summary of changes for version 20031029:
15289 1) ACPI CA Core Subsystem:
15292 Fixed a problem where a level-triggered GPE with an associated
15293 _Lxx control method was incorrectly cleared twice.
15295 Fixed a problem with the Field support code where an access can
15296 occur beyond the end-of-region if the field is non-aligned but
15297 extends to the very end of the parent region (resulted in an
15298 AE_AML_REGION_LIMIT exception.)
15300 Fixed a problem with ACPI Fixed Events where an RT Clock handler
15301 would not get invoked on an RTC event. The RTC event bitmasks for
15302 the PM1 registers were not being initialized properly.
15304 Implemented support for executing _STA and _INI methods for
15305 Processor objects. Although this is currently not part of the
15306 ACPI specification, there is existing ASL code that depends on the
15307 init-time execution of these methods.
15309 Implemented and deployed a GetDescriptorName function to decode
15310 the various types of internal descriptors. Guards against null
15311 descriptors during debug output also.
15313 Implemented and deployed a GetNodeName function to extract the 4-
15314 character namespace node name. This function simplifies the debug
15315 and error output, as well as guarding against null pointers during
15318 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
15319 simplify the debug and error output of 64-bit integers. This
15320 macro replaces the HIDWORD and LODWORD macros for dumping these
15323 Updated the implementation of the Stall() operator to only call
15324 AcpiOsStall(), and also return an error if the operand is larger
15325 than 255. This preserves the required behavior of not
15326 relinquishing the processor, as would happen if AcpiOsSleep() was
15327 called for "long stalls".
15329 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
15330 initialized are now treated as NOOPs.
15332 Cleaned up a handful of warnings during 64-bit generation.
15334 Fixed a reported error where and incorrect GPE number was passed
15335 to the GPE dispatch handler. This value is only used for error
15336 output, however. Used this opportunity to clean up and streamline
15337 the GPE dispatch code.
15339 Code and Data Size: Current and previous core subsystem library
15340 sizes are shown below. These are the code and data sizes for the
15341 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
15342 these values do not include any ACPI driver or OSPM code. The
15344 debug version of the code includes the debug output trace
15345 mechanism and has a much larger code and data size. Note that
15346 these values will vary depending on the efficiency of the compiler
15347 and the compiler options used during generation.
15349 Previous Release (20031002):
15350 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
15351 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
15353 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
15354 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
15357 2) iASL Compiler/Disassembler:
15359 Updated the iASL compiler to return an error if the operand to the
15360 Stall() operator is larger than 255.
15363 ----------------------------------------
15364 02 October 2003. Summary of changes for version 20031002:
15367 1) ACPI CA Core Subsystem:
15369 Fixed a problem with Index Fields where the index was not
15370 incremented for fields that require multiple writes to the
15371 index/data registers (Fields that are wider than the data
15374 Fixed a problem with all Field objects where a write could go
15375 beyond the end-of-field if the field was larger than the access
15376 granularity and therefore required multiple writes to complete the
15377 request. An extra write beyond the end of the field could happen
15380 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
15381 would incorrectly be returned if the width of the Data Register
15382 was larger than the specified field access width.
15384 Completed fixes for LoadTable() and Unload() and verified their
15385 operation. Implemented full support for the "DdbHandle" object
15386 throughout the ACPI CA subsystem.
15388 Implemented full support for the MADT and ECDT tables in the ACPI
15389 CA header files. Even though these tables are not directly
15390 consumed by ACPI CA, the header definitions are useful for ACPI
15393 Integrated resource descriptor fixes posted to the Linux ACPI
15394 list. This included checks for minimum descriptor length, and
15395 support for trailing NULL strings within descriptors that have
15396 optional string elements.
15398 Code and Data Size: Current and previous core subsystem library
15399 sizes are shown below. These are the code and data sizes for the
15400 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
15401 these values do not include any ACPI driver or OSPM code. The
15402 debug version of the code includes the debug output trace
15403 mechanism and has a much larger code and data size. Note that
15404 these values will vary depending on the efficiency of the compiler
15405 and the compiler options used during generation.
15407 Previous Release (20030918):
15408 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
15409 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
15411 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
15412 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
15417 Implemented detection of non-ASCII characters within the input
15418 source ASL file. This catches attempts to compile binary (AML)
15419 files early in the compile, with an informative error message.
15421 Fixed a problem where the disassembler would fault if the output
15422 filename could not be generated or if the output file could not be
15425 ----------------------------------------
15426 18 September 2003. Summary of changes for version 20030918:
15429 1) ACPI CA Core Subsystem:
15431 Found and fixed a longstanding problem with the late execution of
15432 the various deferred AML opcodes (such as Operation Regions,
15433 Buffer Fields, Buffers, and Packages). If the name string
15434 specified for the name of the new object placed the object in a
15435 scope other than the current scope, the initialization/execution
15436 of the opcode failed. The solution to this problem was to
15437 implement a mechanism where the late execution of such opcodes
15438 does not attempt to lookup/create the name a second time in an
15439 incorrect scope. This fixes the "region size computed
15440 incorrectly" problem.
15442 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
15443 Global Lock AE_BAD_PARAMETER error.
15445 Fixed several 64-bit issues with prototypes, casting and data
15448 Removed duplicate prototype from acdisasm.h
15450 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
15452 Code and Data Size: Current and previous core subsystem library
15453 sizes are shown below. These are the code and data sizes for the
15454 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
15455 these values do not include any ACPI driver or OSPM code. The
15456 debug version of the code includes the debug output trace
15457 mechanism and has a much larger code and data size. Note that
15458 these values will vary depending on the efficiency of the compiler
15459 and the compiler options used during generation.
15463 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
15464 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
15466 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
15467 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
15472 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
15473 correct sleep time in seconds.
15475 ----------------------------------------
15476 14 July 2003. Summary of changes for version 20030619:
15478 1) ACPI CA Core Subsystem:
15480 Parse SSDTs in order discovered, as opposed to reverse order
15483 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
15490 Dynamically allocate SDT list (suggested by Andi Kleen)
15492 proc function return value cleanups (Andi Kleen)
15494 Correctly handle NMI watchdog during long stalls (Andrew Morton)
15496 Make it so acpismp=force works (reported by Andrew Morton)
15499 ----------------------------------------
15500 19 June 2003. Summary of changes for version 20030619:
15502 1) ACPI CA Core Subsystem:
15504 Fix To/FromBCD, eliminating the need for an arch-specific #define.
15506 Do not acquire a semaphore in the S5 shutdown path.
15508 Fix ex_digits_needed for 0. (Takayoshi Kochi)
15510 Fix sleep/stall code reversal. (Andi Kleen)
15512 Revert a change having to do with control method calling
15517 acpiphp update (Takayoshi Kochi)
15519 Export acpi_disabled for sonypi (Stelian Pop)
15521 Mention acpismp=force in config help
15523 Re-add acpitable.c and acpismp=force. This improves backwards
15525 compatibility and also cleans up the code to a significant degree.
15527 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
15529 ----------------------------------------
15530 22 May 2003. Summary of changes for version 20030522:
15532 1) ACPI CA Core Subsystem:
15534 Found and fixed a reported problem where an AE_NOT_FOUND error
15535 occurred occasionally during _BST evaluation. This turned out to
15536 be an Owner ID allocation issue where a called method did not get
15537 a new ID assigned to it. Eventually, (after 64k calls), the Owner
15538 ID UINT16 would wraparound so that the ID would be the same as the
15539 caller's and the called method would delete the caller's
15542 Implemented extended error reporting for control methods that are
15543 aborted due to a run-time exception. Output includes the exact
15544 AML instruction that caused the method abort, a dump of the method
15545 locals and arguments at the time of the abort, and a trace of all
15546 nested control method calls.
15548 Modified the interpreter to allow the creation of buffers of zero
15549 length from the AML code. Implemented new code to ensure that no
15550 attempt is made to actually allocate a memory buffer (of length
15551 zero) - instead, a simple buffer object with a NULL buffer pointer
15552 and length zero is created. A warning is no longer issued when
15553 the AML attempts to create a zero-length buffer.
15555 Implemented a workaround for the "leading asterisk issue" in
15556 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
15557 asterisk is automatically removed if present in any HID, UID, or
15558 CID strings. The iASL compiler will still flag this asterisk as
15561 Implemented full support for _CID methods that return a package of
15562 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
15563 now additionally returns a device _CID list if present. This
15564 required a change to the external interface in order to pass an
15565 ACPI_BUFFER object as a parameter since the _CID list is of
15568 Fixed a problem with the new AE_SAME_HANDLER exception where
15569 handler initialization code did not know about this exception.
15571 Code and Data Size: Current and previous core subsystem library
15572 sizes are shown below. These are the code and data sizes for the
15573 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
15574 these values do not include any ACPI driver or OSPM code. The
15575 debug version of the code includes the debug output trace
15576 mechanism and has a much larger code and data size. Note that
15577 these values will vary depending on the efficiency of the compiler
15578 and the compiler options used during generation.
15580 Previous Release (20030509):
15581 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
15582 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
15584 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
15585 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
15590 Fixed a bug in which we would reinitialize the ACPI interrupt
15591 after it was already working, thus disabling all ACPI and the IRQs
15592 for any other device sharing the interrupt. (Thanks to Stian
15595 Toshiba driver update (John Belmonte)
15597 Return only 0 or 1 for our interrupt handler status (Andrew
15603 Fixed a reported problem where multiple (nested) ElseIf()
15604 statements were not handled correctly by the compiler, resulting
15605 in incorrect warnings and incorrect AML code. This was a problem
15606 in both the ASL parser and the code generator.
15611 Added changes to existing interfaces, new exception codes, and new
15612 text concerning reference count object management versus garbage
15615 ----------------------------------------
15616 09 May 2003. Summary of changes for version 20030509.
15619 1) ACPI CA Core Subsystem:
15621 Changed the subsystem initialization sequence to hold off
15622 installation of address space handlers until the hardware has been
15623 initialized and the system has entered ACPI mode. This is because
15624 the installation of space handlers can cause _REG methods to be
15625 run. Previously, the _REG methods could potentially be run before
15626 ACPI mode was enabled.
15628 Fixed some memory leak issues related to address space handler and
15629 notify handler installation. There were some problems with the
15630 reference count mechanism caused by the fact that the handler
15631 objects are shared across several namespace objects.
15633 Fixed a reported problem where reference counts within the
15634 namespace were not properly updated when named objects created by
15635 method execution were deleted.
15637 Fixed a reported problem where multiple SSDTs caused a deletion
15638 issue during subsystem termination. Restructured the table data
15639 structures to simplify the linked lists and the related code.
15641 Fixed a problem where the table ID associated with secondary
15642 tables (SSDTs) was not being propagated into the namespace objects
15643 created by those tables. This would only present a problem for
15644 tables that are unloaded at run-time, however.
15646 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
15647 type as the length parameter (instead of UINT32).
15649 Solved a long-standing problem where an ALREADY_EXISTS error
15650 appears on various systems. This problem could happen when there
15651 are multiple PCI_Config operation regions under a single PCI root
15652 bus. This doesn't happen very frequently, but there are some
15653 systems that do this in the ASL.
15655 Fixed a reported problem where the internal DeleteNode function
15656 was incorrectly handling the case where a namespace node was the
15657 first in the parent's child list, and had additional peers (not
15658 the only child, but first in the list of children.)
15660 Code and Data Size: Current core subsystem library sizes are shown
15661 below. These are the code and data sizes for the acpica.lib
15662 produced by the Microsoft Visual C++ 6.0 compiler, and these
15663 values do not include any ACPI driver or OSPM code. The debug
15664 version of the code includes the debug output trace mechanism and
15665 has a much larger code and data size. Note that these values will
15666 vary depending on the efficiency of the compiler and the compiler
15667 options used during generation.
15670 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
15671 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
15673 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
15674 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
15679 Allow ":" in OS override string (Ducrot Bruno)
15681 Kobject fix (Greg KH)
15684 3 iASL Compiler/Disassembler:
15686 Fixed a problem in the generation of the C source code files (AML
15687 is emitted in C source statements for BIOS inclusion) where the
15688 Ascii dump that appears within a C comment at the end of each line
15689 could cause a compile time error if the AML sequence happens to
15690 have an open comment or close comment sequence embedded.
15693 ----------------------------------------
15694 24 April 2003. Summary of changes for version 20030424.
15697 1) ACPI CA Core Subsystem:
15699 Support for big-endian systems has been implemented. Most of the
15700 support has been invisibly added behind big-endian versions of the
15701 ACPI_MOVE_* macros.
15703 Fixed a problem in AcpiHwDisableGpeBlock() and
15704 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
15705 low level hardware write routine. The offset parameter was
15706 actually eliminated from the low level read/write routines because
15707 they had become obsolete.
15709 Fixed a problem where a handler object was deleted twice during
15710 the removal of a fixed event handler.
15715 A fix for SMP systems with link devices was contributed by
15719 (2.5) Return whether we handled the interrupt in our IRQ handler.
15720 (Linux ISRs no longer return void, so we can propagate the handler
15721 return value from the ACPI CA core back to the OS.)
15727 The ACPI CA Programmer Reference has been updated to reflect new
15728 interfaces and changes to existing interfaces.
15730 ----------------------------------------
15731 28 March 2003. Summary of changes for version 20030328.
15733 1) ACPI CA Core Subsystem:
15735 The GPE Block Device support has been completed. New interfaces
15736 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
15737 interfaces (enable, disable, clear, getstatus) have been split
15738 into separate interfaces for Fixed Events and General Purpose
15739 Events (GPEs) in order to support GPE Block Devices properly.
15741 Fixed a problem where the error message "Failed to acquire
15742 semaphore" would appear during operations on the embedded
15745 Code and Data Size: Current core subsystem library sizes are shown
15746 below. These are the code and data sizes for the acpica.lib
15747 produced by the Microsoft Visual C++ 6.0 compiler, and these
15748 values do not include any ACPI driver or OSPM code. The debug
15749 version of the code includes the debug output trace mechanism and
15750 has a much larger code and data size. Note that these values will
15751 vary depending on the efficiency of the compiler and the compiler
15752 options used during generation.
15755 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
15756 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
15758 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
15759 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
15762 ----------------------------------------
15763 28 February 2003. Summary of changes for version 20030228.
15766 1) ACPI CA Core Subsystem:
15768 The GPE handling and dispatch code has been completely overhauled
15769 in preparation for support of GPE Block Devices (ID ACPI0006).
15770 This affects internal data structures and code only; there should
15771 be no differences visible externally. One new file has been
15774 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
15775 fields that are used to determine the GPE block lengths. The
15776 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
15777 structures are ignored. This is per the ACPI specification but it
15778 isn't very clear. The full 256 Block 0/1 GPEs are now supported
15779 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
15781 In the SCI interrupt handler, removed the read of the PM1_CONTROL
15782 register to look at the SCI_EN bit. On some machines, this read
15783 causes an SMI event and greatly slows down SCI events. (This may
15784 in fact be the cause of slow battery status response on some
15787 Fixed a problem where a store of a NULL string to a package object
15788 could cause the premature deletion of the object. This was seen
15789 during execution of the battery _BIF method on some systems,
15790 resulting in no battery data being returned.
15792 Added AcpiWalkResources interface to simplify parsing of resource
15795 Code and Data Size: Current core subsystem library sizes are shown
15796 below. These are the code and data sizes for the acpica.lib
15797 produced by the Microsoft Visual C++ 6.0 compiler, and these
15798 values do not include any ACPI driver or OSPM code. The debug
15799 version of the code includes the debug output trace mechanism and
15800 has a much larger code and data size. Note that these values will
15801 vary depending on the efficiency of the compiler and the compiler
15802 options used during generation.
15805 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15806 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15808 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
15809 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
15814 S3 fixes (Ole Rohne)
15816 Update ACPI PHP driver with to use new acpi_walk_resource API
15819 Add S4BIOS support (Pavel Machek)
15821 Map in entire table before performing checksum (John Stultz)
15823 Expand the mem= cmdline to allow the specification of reserved and
15824 ACPI DATA blocks (Pavel Machek)
15826 Never use ACPI on VISWS
15828 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
15830 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
15831 causing us to think that some systems support C2 when they really
15834 Do not count processor objects for non-present CPUs (Thanks to
15840 Fixed a problem where ASL include files could not be found and
15843 Added support for the _PDC reserved name.
15846 ----------------------------------------
15847 22 January 2003. Summary of changes for version 20030122.
15850 1) ACPI CA Core Subsystem:
15852 Added a check for constructs of the form: Store (Local0, Local0)
15853 where Local0 is not initialized. Apparently, some BIOS
15854 programmers believe that this is a NOOP. Since this store doesn't
15855 do anything anyway, the new prototype behavior will ignore this
15856 error. This is a case where we can relax the strict checking in
15857 the interpreter in the name of compatibility.
15862 The AcpiSrc Source Conversion Utility has been released with the
15863 Linux package for the first time. This is the utility that is
15864 used to convert the ACPI CA base source code to the Linux version.
15866 (Both) Handle P_BLK lengths shorter than 6 more gracefully
15868 (Both) Move more headers to include/acpi, and delete an unused
15871 (Both) Move drivers/acpi/include directory to include/acpi
15873 (Both) Boot functions don't use cmdline, so don't pass it around
15875 (Both) Remove include of unused header (Adrian Bunk)
15877 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
15879 former now also includes the latter, acpiphp.h only needs the one,
15882 (2.5) Make it possible to select method of bios restoring after S3
15883 resume. [=> no more ugly ifdefs] (Pavel Machek)
15885 (2.5) Make proc write interfaces work (Pavel Machek)
15887 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
15889 (2.5) Break out ACPI Perf code into its own module, under cpufreq
15890 (Dominik Brodowski)
15892 (2.4) S4BIOS support (Ducrot Bruno)
15894 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
15900 Added support to disassemble SSDT and PSDTs.
15902 Implemented support to obtain SSDTs from the Windows registry if
15906 ----------------------------------------
15907 09 January 2003. Summary of changes for version 20030109.
15909 1) ACPI CA Core Subsystem:
15911 Changed the behavior of the internal Buffer-to-String conversion
15912 function. The current ACPI specification states that the contents
15913 of the buffer are "converted to a string of two-character
15914 hexadecimal numbers, each separated by a space". Unfortunately,
15915 this definition is not backwards compatible with existing ACPI 1.0
15916 implementations (although the behavior was not defined in the ACPI
15917 1.0 specification). The new behavior simply copies data from the
15918 buffer to the string until a null character is found or the end of
15919 the buffer is reached. The new String object is always null
15920 terminated. This problem was seen during the generation of _BIF
15921 battery data where incorrect strings were returned for battery
15922 type, etc. This will also require an errata to the ACPI
15925 Renamed all instances of NATIVE_UINT and NATIVE_INT to
15926 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
15928 Copyright in all module headers (both Linux and non-Linux) has be
15931 Code and Data Size: Current core subsystem library sizes are shown
15932 below. These are the code and data sizes for the acpica.lib
15933 produced by the Microsoft Visual C++ 6.0 compiler, and these
15934 values do not include any ACPI driver or OSPM code. The debug
15935 version of the code includes the debug output trace mechanism and
15936 has a much larger code and data size. Note that these values will
15937 vary depending on the efficiency of the compiler and the compiler
15938 options used during generation.
15941 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15942 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15944 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15945 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15950 Fixed an oops on module insertion/removal (Matthew Tippett)
15952 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
15954 (2.5) Replace pr_debug (Randy Dunlap)
15956 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
15958 (Both) Eliminate spawning of thread from timer callback, in favor
15961 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
15963 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
15965 (Both) Add missing statics to button.c (Pavel Machek)
15967 Several changes have been made to the source code translation
15968 utility that generates the Linux Code in order to make the code
15971 All typedefs on structs and unions have been removed in keeping
15972 with the Linux coding style.
15974 Removed the non-Linux SourceSafe module revision number from each
15977 Completed major overhaul of symbols to be lowercase for linux.
15978 Doubled the number of symbols that are lowercase.
15980 Fixed a problem where identifiers within procedure headers and
15981 within quotes were not fully lower cased (they were left with a
15984 Some C macros whose only purpose is to allow the generation of 16-
15985 bit code are now completely removed in the Linux code, increasing
15986 readability and maintainability.
15988 ----------------------------------------
15990 12 December 2002. Summary of changes for version 20021212.
15993 1) ACPI CA Core Subsystem:
15995 Fixed a problem where the creation of a zero-length AML Buffer
15996 would cause a fault.
15998 Fixed a problem where a Buffer object that pointed to a static AML
15999 buffer (in an ACPI table) could inadvertently be deleted, causing
16002 Fixed a problem where a user buffer (passed in to the external
16003 ACPI CA interfaces) could be overwritten if the buffer was too
16004 small to complete the operation, causing memory corruption.
16006 Fixed a problem in the Buffer-to-String conversion code where a
16007 string of length one was always returned, regardless of the size
16008 of the input Buffer object.
16010 Removed the NATIVE_CHAR data type across the entire source due to
16011 lack of need and lack of consistent use.
16013 Code and Data Size: Current core subsystem library sizes are shown
16014 below. These are the code and data sizes for the acpica.lib
16015 produced by the Microsoft Visual C++ 6.0 compiler, and these
16016 values do not include any ACPI driver or OSPM code. The debug
16017 version of the code includes the debug output trace mechanism and
16018 has a much larger code and data size. Note that these values will
16019 vary depending on the efficiency of the compiler and the compiler
16020 options used during generation.
16023 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
16024 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
16026 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
16027 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
16030 ----------------------------------------
16031 05 December 2002. Summary of changes for version 20021205.
16033 1) ACPI CA Core Subsystem:
16035 Fixed a problem where a store to a String or Buffer object could
16036 cause corruption of the DSDT if the object type being stored was
16037 the same as the target object type and the length of the object
16038 being stored was equal to or smaller than the original (existing)
16039 target object. This was seen to cause corruption of battery _BIF
16040 buffers if the _BIF method modified the buffer on the fly.
16042 Fixed a problem where an internal error was generated if a control
16043 method invocation was used in an OperationRegion, Buffer, or
16044 Package declaration. This was caused by the deferred parsing of
16045 the control method and thus the deferred creation of the internal
16046 method object. The solution to this problem was to create the
16047 internal method object at the moment the method is encountered in
16048 the first pass - so that subsequent references to the method will
16049 able to obtain the required parameter count and thus properly
16050 parse the method invocation. This problem presented itself as an
16051 AE_AML_INTERNAL during the pass 1 parse phase during table load.
16053 Fixed a problem where the internal String object copy routine did
16054 not always allocate sufficient memory for the target String object
16055 and caused memory corruption. This problem was seen to cause
16056 "Allocation already present in list!" errors as memory allocation
16059 Implemented a new function for the evaluation of namespace objects
16060 that allows the specification of the allowable return object
16061 types. This simplifies a lot of code that checks for a return
16062 object of one or more specific objects returned from the
16063 evaluation (such as _STA, etc.) This may become and external
16064 function if it would be useful to ACPI-related drivers.
16066 Completed another round of prefixing #defines with "ACPI_" for
16069 Completed additional code restructuring to allow more modular
16070 linking for iASL compiler and AcpiExec. Several files were split
16071 creating new files. New files: nsparse.c dsinit.c evgpe.c
16073 Implemented an abort mechanism to terminate an executing control
16074 method via the AML debugger. This feature is useful for debugging
16075 control methods that depend (wait) for specific hardware
16078 Code and Data Size: Current core subsystem library sizes are shown
16079 below. These are the code and data sizes for the acpica.lib
16080 produced by the Microsoft Visual C++ 6.0 compiler, and these
16081 values do not include any ACPI driver or OSPM code. The debug
16082 version of the code includes the debug output trace mechanism and
16083 has a much larger code and data size. Note that these values will
16084 vary depending on the efficiency of the compiler and the compiler
16085 options used during generation.
16088 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
16089 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
16091 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
16092 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
16095 2) iASL Compiler/Disassembler
16097 Fixed a compiler code generation problem for "Interrupt" Resource
16098 Descriptors. If specified in the ASL, the optional "Resource
16099 Source Index" and "Resource Source" fields were not inserted into
16100 the correct location within the AML resource descriptor, creating
16101 an invalid descriptor.
16103 Fixed a disassembler problem for "Interrupt" resource descriptors.
16104 The optional "Resource Source Index" and "Resource Source" fields
16108 ----------------------------------------
16109 22 November 2002. Summary of changes for version 20021122.
16112 1) ACPI CA Core Subsystem:
16114 Fixed a reported problem where an object stored to a Method Local
16115 or Arg was not copied to a new object during the store - the
16116 object pointer was simply copied to the Local/Arg. This caused
16117 all subsequent operations on the Local/Arg to also affect the
16118 original source of the store operation.
16120 Fixed a problem where a store operation to a Method Local or Arg
16121 was not completed properly if the Local/Arg contained a reference
16122 (from RefOf) to a named field. The general-purpose store-to-
16123 namespace-node code is now used so that this case is handled
16126 Fixed a problem where the internal object copy routine would cause
16127 a protection fault if the object being copied was a Package and
16128 contained either 1) a NULL package element or 2) a nested sub-
16131 Fixed a problem with the GPE initialization that resulted from an
16132 ambiguity in the ACPI specification. One section of the
16133 specification states that both the address and length of the GPE
16134 block must be zero if the block is not supported. Another section
16135 implies that only the address need be zero if the block is not
16136 supported. The code has been changed so that both the address and
16137 the length must be non-zero to indicate a valid GPE block (i.e.,
16138 if either the address or the length is zero, the GPE block is
16141 Code and Data Size: Current core subsystem library sizes are shown
16142 below. These are the code and data sizes for the acpica.lib
16143 produced by the Microsoft Visual C++ 6.0 compiler, and these
16144 values do not include any ACPI driver or OSPM code. The debug
16145 version of the code includes the debug output trace mechanism and
16146 has a much larger code and data size. Note that these values will
16147 vary depending on the efficiency of the compiler and the compiler
16148 options used during generation.
16151 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
16152 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
16154 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
16155 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
16160 Cleaned up EC driver. Exported an external EC read/write
16161 interface. By going through this, other drivers (most notably
16162 sonypi) will be able to serialize access to the EC.
16165 3) iASL Compiler/Disassembler
16167 Implemented support to optionally generate include files for both
16168 ASM and C (the -i switch). This simplifies BIOS development by
16169 automatically creating include files that contain external
16170 declarations for the symbols that are created within the
16172 (optionally generated) ASM and C AML source files.
16175 ----------------------------------------
16176 15 November 2002. Summary of changes for version 20021115.
16178 1) ACPI CA Core Subsystem:
16180 Fixed a memory leak problem where an error during resolution of
16182 method arguments during a method invocation from another method
16183 failed to cleanup properly by deleting all successfully resolved
16186 Fixed a problem where the target of the Index() operator was not
16187 correctly constructed if the source object was a package. This
16188 problem has not been detected because the use of a target operand
16189 with Index() is very rare.
16191 Fixed a problem with the Index() operator where an attempt was
16192 made to delete the operand objects twice.
16194 Fixed a problem where an attempt was made to delete an operand
16195 twice during execution of the CondRefOf() operator if the target
16198 Implemented the first of perhaps several internal create object
16199 functions that create and initialize a specific object type. This
16200 consolidates duplicated code wherever the object is created, thus
16201 shrinking the size of the subsystem.
16203 Implemented improved debug/error messages for errors that occur
16204 during nested method invocations. All executing method pathnames
16205 are displayed (with the error) as the call stack is unwound - thus
16208 Fixed a problem introduced in the 10/02 release that caused
16209 premature deletion of a buffer object if a buffer was used as an
16210 ASL operand where an integer operand is required (Thus causing an
16211 implicit object conversion from Buffer to Integer.) The change in
16212 the 10/02 release was attempting to fix a memory leak (albeit
16215 Code and Data Size: Current core subsystem library sizes are shown
16216 below. These are the code and data sizes for the acpica.lib
16217 produced by the Microsoft Visual C++ 6.0 compiler, and these
16218 values do not include any ACPI driver or OSPM code. The debug
16219 version of the code includes the debug output trace mechanism and
16220 has a much larger code and data size. Note that these values will
16221 vary depending on the efficiency of the compiler and the compiler
16222 options used during generation.
16225 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
16226 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
16228 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
16229 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
16234 Changed the implementation of the ACPI semaphores to use down()
16235 instead of down_interruptable(). It is important that the
16236 execution of ACPI control methods not be interrupted by signals.
16237 Methods must run to completion, or the system may be left in an
16238 unknown/unstable state.
16240 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
16244 3) iASL Compiler/Disassembler
16247 Changed the default location of output files. All output files
16248 are now placed in the current directory by default instead of in
16249 the directory of the source file. This change may affect some
16250 existing makefiles, but it brings the behavior of the compiler in
16251 line with other similar tools. The location of the output files
16252 can be overridden with the -p command line switch.
16255 ----------------------------------------
16256 11 November 2002. Summary of changes for version 20021111.
16259 0) ACPI Specification 2.0B is released and is now available at:
16260 http://www.acpi.info/index.html
16263 1) ACPI CA Core Subsystem:
16265 Implemented support for the ACPI 2.0 SMBus Operation Regions.
16266 This includes the early detection and handoff of the request to
16267 the SMBus region handler (avoiding all of the complex field
16268 support code), and support for the bidirectional return packet
16269 from an SMBus write operation. This paves the way for the
16270 development of SMBus drivers in each host operating system.
16272 Fixed a problem where the semaphore WAIT_FOREVER constant was
16273 defined as 32 bits, but must be 16 bits according to the ACPI
16274 specification. This had the side effect of causing ASL
16275 Mutex/Event timeouts even though the ASL code requested a wait
16276 forever. Changed all internal references to the ACPI timeout
16277 parameter to 16 bits to prevent future problems. Changed the name
16278 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
16280 Code and Data Size: Current core subsystem library sizes are shown
16281 below. These are the code and data sizes for the acpica.lib
16282 produced by the Microsoft Visual C++ 6.0 compiler, and these
16283 values do not include any ACPI driver or OSPM code. The debug
16284 version of the code includes the debug output trace mechanism and
16285 has a much larger code and data size. Note that these values will
16286 vary depending on the efficiency of the compiler and the compiler
16287 options used during generation.
16290 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
16291 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
16293 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
16294 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
16299 Module loading/unloading fixes (John Cagle)
16302 3) iASL Compiler/Disassembler
16304 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
16306 Implemented support for the disassembly of all SMBus protocol
16307 keywords (SMBQuick, SMBWord, etc.)
16309 ----------------------------------------
16310 01 November 2002. Summary of changes for version 20021101.
16313 1) ACPI CA Core Subsystem:
16315 Fixed a problem where platforms that have a GPE1 block but no GPE0
16316 block were not handled correctly. This resulted in a "GPE
16317 overlap" error message. GPE0 is no longer required.
16319 Removed code added in the previous release that inserted nodes
16320 into the namespace in alphabetical order. This caused some side-
16321 effects on various machines. The root cause of the problem is
16322 still under investigation since in theory, the internal ordering
16323 of the namespace nodes should not matter.
16326 Enhanced error reporting for the case where a named object is not
16327 found during control method execution. The full ACPI namepath
16328 (name reference) of the object that was not found is displayed in
16331 Note: as a result of the overhaul of the namespace object types in
16332 the previous release, the namespace nodes for the predefined
16333 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
16334 instead of ACPI_TYPE_ANY. This simplifies the namespace
16335 management code but may affect code that walks the namespace tree
16336 looking for specific object types.
16338 Code and Data Size: Current core subsystem library sizes are shown
16339 below. These are the code and data sizes for the acpica.lib
16340 produced by the Microsoft Visual C++ 6.0 compiler, and these
16341 values do not include any ACPI driver or OSPM code. The debug
16342 version of the code includes the debug output trace mechanism and
16343 has a much larger code and data size. Note that these values will
16344 vary depending on the efficiency of the compiler and the compiler
16345 options used during generation.
16348 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
16349 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
16351 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
16352 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
16357 Fixed a problem introduced in the previous release where the
16358 Processor and Thermal objects were not recognized and installed in
16359 /proc. This was related to the scope type change described above.
16362 3) iASL Compiler/Disassembler
16364 Implemented the -g option to get all of the required ACPI tables
16365 from the registry and save them to files (Windows version of the
16366 compiler only.) The required tables are the FADT, FACS, and DSDT.
16368 Added ACPI table checksum validation during table disassembly in
16369 order to catch corrupted tables.
16372 ----------------------------------------
16373 22 October 2002. Summary of changes for version 20021022.
16375 1) ACPI CA Core Subsystem:
16377 Implemented a restriction on the Scope operator that the target
16378 must already exist in the namespace at the time the operator is
16379 encountered (during table load or method execution). In other
16380 words, forward references are not allowed and Scope() cannot
16381 create a new object. This changes the previous behavior where the
16382 interpreter would create the name if not found. This new behavior
16383 correctly enables the search-to-root algorithm during namespace
16384 lookup of the target name. Because of this upsearch, this fixes
16385 the known Compaq _SB_.OKEC problem and makes both the AML
16386 interpreter and iASL compiler compatible with other ACPI
16389 Completed a major overhaul of the internal ACPI object types for
16390 the ACPI Namespace and the associated operand objects. Many of
16391 these types had become obsolete with the introduction of the two-
16392 pass namespace load. This cleanup simplifies the code and makes
16393 the entire namespace load mechanism much clearer and easier to
16396 Improved debug output for tracking scope opening/closing to help
16397 diagnose scoping issues. The old scope name as well as the new
16398 scope name are displayed. Also improved error messages for
16399 problems with ASL Mutex objects and error messages for GPE
16402 Cleaned up the namespace dump code, removed obsolete code.
16404 All string output (for all namespace/object dumps) now uses the
16405 common ACPI string output procedure which handles escapes properly
16406 and does not emit non-printable characters.
16408 Fixed some issues with constants in the 64-bit version of the
16409 local C library (utclib.c)
16414 EC Driver: No longer attempts to acquire the Global Lock at
16418 3) iASL Compiler/Disassembler
16420 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
16421 2 opcodes outside of a control method. This means that the
16422 "executable" operators (versus the "namespace" operators) cannot
16423 be used at the table level; they can only be used within a control
16426 Implemented the restriction on the Scope() operator where the
16427 target must already exist in the namespace at the time the
16428 operator is encountered (during ASL compilation). In other words,
16429 forward references are not allowed and Scope() cannot create a new
16430 object. This makes the iASL compiler compatible with other ACPI
16431 implementations and makes the Scope() implementation adhere to the
16432 ACPI specification.
16434 Fixed a problem where namepath optimization for the Alias operator
16435 was optimizing the wrong path (of the two namepaths.) This caused
16436 a "Missing alias link" error message.
16438 Fixed a problem where an "unknown reserved name" warning could be
16439 incorrectly generated for names like "_SB" when the trailing
16440 underscore is not used in the original ASL.
16442 Fixed a problem where the reserved name check did not handle
16443 NamePaths with multiple NameSegs correctly. The first nameseg of
16444 the NamePath was examined instead of the last NameSeg.
16447 ----------------------------------------
16449 02 October 2002. Summary of changes for this release.
16452 1) ACPI CA Core Subsystem version 20021002:
16454 Fixed a problem where a store/copy of a string to an existing
16455 string did not always set the string length properly in the String
16458 Fixed a reported problem with the ToString operator where the
16459 behavior was identical to the ToHexString operator instead of just
16460 simply converting a raw buffer to a string data type.
16462 Fixed a problem where CopyObject and the other "explicit"
16463 conversion operators were not updating the internal namespace node
16464 type as part of the store operation.
16466 Fixed a memory leak during implicit source operand conversion
16467 where the original object was not deleted if it was converted to a
16468 new object of a different type.
16470 Enhanced error messages for all problems associated with namespace
16471 lookups. Common procedure generates and prints the lookup name as
16472 well as the formatted status.
16474 Completed implementation of a new design for the Alias support
16475 within the namespace. The existing design did not handle the case
16476 where a new object was assigned to one of the two names due to the
16477 use of an explicit conversion operator, resulting in the two names
16478 pointing to two different objects. The new design simply points
16479 the Alias name to the original name node - not to the object.
16480 This results in a level of indirection that must be handled in the
16481 name resolution mechanism.
16483 Code and Data Size: Current core subsystem library sizes are shown
16484 below. These are the code and data sizes for the acpica.lib
16485 produced by the Microsoft Visual C++ 6.0 compiler, and these
16486 values do not include any ACPI driver or OSPM code. The debug
16487 version of the code includes the debug output trace mechanism and
16488 has a larger code and data size. Note that these values will vary
16489 depending on the efficiency of the compiler and the compiler
16490 options used during generation.
16493 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
16494 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
16496 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
16497 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
16502 Initialize thermal driver's timer before it is used. (Knut
16505 Allow handling negative celsius values. (Kochi Takayoshi)
16507 Fix thermal management and make trip points. R/W (Pavel Machek)
16509 Fix /proc/acpi/sleep. (P. Christeas)
16511 IA64 fixes. (David Mosberger)
16513 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
16515 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
16519 3) iASL Compiler/Disassembler
16521 Clarified some warning/error messages.
16524 ----------------------------------------
16525 18 September 2002. Summary of changes for this release.
16528 1) ACPI CA Core Subsystem version 20020918:
16530 Fixed a reported problem with reference chaining (via the Index()
16531 and RefOf() operators) in the ObjectType() and SizeOf() operators.
16532 The definition of these operators includes the dereferencing of
16533 all chained references to return information on the base object.
16535 Fixed a problem with stores to indexed package elements - the
16536 existing code would not complete the store if an "implicit
16537 conversion" was not performed. In other words, if the existing
16538 object (package element) was to be replaced completely, the code
16539 didn't handle this case.
16541 Relaxed typechecking on the ASL "Scope" operator to allow the
16542 target name to refer to an object of type Integer, String, or
16543 Buffer, in addition to the scoping object types (Device,
16544 predefined Scopes, Processor, PowerResource, and ThermalZone.)
16545 This allows existing AML code that has workarounds for a bug in
16546 Windows to function properly. A warning is issued, however. This
16547 affects both the AML interpreter and the iASL compiler. Below is
16548 an example of this type of ASL code:
16554 Fixed some reported problems with 64-bit integer support in the
16555 local implementation of C library functions (clib.c)
16560 Use ACPI fix map region instead of IOAPIC region, since it is
16561 undefined in non-SMP.
16563 Ensure that the SCI has the proper polarity and trigger, even on
16564 systems that do not have an interrupt override entry in the MADT.
16566 2.5 big driver reorganization (Pat Mochel)
16568 Use early table mapping code from acpitable.c (Andi Kleen)
16570 New blacklist entries (Andi Kleen)
16572 Blacklist improvements. Split blacklist code out into a separate
16573 file. Move checking the blacklist to very early. Previously, we
16574 would use ACPI tables, and then halfway through init, check the
16575 blacklist -- too late. Now, it's early enough to completely fall-
16579 3) iASL Compiler/Disassembler version 20020918:
16581 Fixed a problem where the typechecking code didn't know that an
16582 alias could point to a method. In other words, aliases were not
16583 being dereferenced during typechecking.
16586 ----------------------------------------
16587 29 August 2002. Summary of changes for this release.
16589 1) ACPI CA Core Subsystem Version 20020829:
16591 If the target of a Scope() operator already exists, it must be an
16592 object type that actually opens a scope -- such as a Device,
16593 Method, Scope, etc. This is a fatal runtime error. Similar error
16594 check has been added to the iASL compiler also.
16596 Tightened up the namespace load to disallow multiple names in the
16597 same scope. This previously was allowed if both objects were of
16598 the same type. (i.e., a lookup was the same as entering a new
16604 Ensure that the ACPI interrupt has the proper trigger and
16607 local_irq_disable is extraneous. (Matthew Wilcox)
16609 Make "acpi=off" actually do what it says, and not use the ACPI
16610 interpreter *or* the tables.
16612 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
16616 3) iASL Compiler/Disassembler Version 20020829:
16618 Implemented namepath optimization for name declarations. For
16619 example, a declaration like "Method (\_SB_.ABCD)" would get
16620 optimized to "Method (ABCD)" if the declaration is within the
16621 \_SB_ scope. This optimization is in addition to the named
16622 reference path optimization first released in the previous
16623 version. This would seem to complete all possible optimizations
16624 for namepaths within the ASL/AML.
16626 If the target of a Scope() operator already exists, it must be an
16627 object type that actually opens a scope -- such as a Device,
16628 Method, Scope, etc.
16630 Implemented a check and warning for unreachable code in the same
16631 block below a Return() statement.
16633 Fixed a problem where the listing file was not generated if the
16634 compiler aborted if the maximum error count was exceeded (200).
16636 Fixed a problem where the typechecking of method return values was
16637 broken. This includes the check for a return value when the
16638 method is invoked as a TermArg (a return value is expected.)
16640 Fixed a reported problem where EOF conditions during a quoted
16641 string or comment caused a fault.
16644 ----------------------------------------
16645 15 August 2002. Summary of changes for this release.
16647 1) ACPI CA Core Subsystem Version 20020815:
16649 Fixed a reported problem where a Store to a method argument that
16650 contains a reference did not perform the indirect store correctly.
16651 This problem was created during the conversion to the new
16652 reference object model - the indirect store to a method argument
16653 code was not updated to reflect the new model.
16655 Reworked the ACPI mode change code to better conform to ACPI 2.0,
16656 handle corner cases, and improve code legibility (Kochi Takayoshi)
16658 Fixed a problem with the pathname parsing for the carat (^)
16659 prefix. The heavy use of the carat operator by the new namepath
16660 optimization in the iASL compiler uncovered a problem with the AML
16661 interpreter handling of this prefix. In the case where one or
16662 more carats precede a single nameseg, the nameseg was treated as
16663 standalone and the search rule (to root) was inadvertently
16664 applied. This could cause both the iASL compiler and the
16665 interpreter to find the wrong object or to miss the error that
16666 should occur if the object does not exist at that exact pathname.
16668 Found and fixed the problem where the HP Pavilion DSDT would not
16669 load. This was a relatively minor tweak to the table loading code
16670 (a problem caused by the unexpected encounter with a method
16671 invocation not within a control method), but it does not solve the
16672 overall issue of the execution of AML code at the table level.
16673 This investigation is still ongoing.
16675 Code and Data Size: Current core subsystem library sizes are shown
16676 below. These are the code and data sizes for the acpica.lib
16677 produced by the Microsoft Visual C++ 6.0 compiler, and these
16678 values do not include any ACPI driver or OSPM code. The debug
16679 version of the code includes the debug output trace mechanism and
16680 has a larger code and data size. Note that these values will vary
16681 depending on the efficiency of the compiler and the compiler
16682 options used during generation.
16685 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
16686 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
16688 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
16689 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
16694 Remove redundant slab.h include (Brad Hards)
16696 Fix several bugs in thermal.c (Herbert Nachtnebel)
16698 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
16700 Change acpi_system_suspend to use updated irq functions (Pavel
16703 Export acpi_get_firmware_table (Matthew Wilcox)
16705 Use proper root proc entry for ACPI (Kochi Takayoshi)
16707 Fix early-boot table parsing (Bjorn Helgaas)
16710 3) iASL Compiler/Disassembler
16712 Reworked the compiler options to make them more consistent and to
16713 use two-letter options where appropriate. We were running out of
16714 sensible letters. This may break some makefiles, so check the
16715 current options list by invoking the compiler with no parameters.
16717 Completed the design and implementation of the ASL namepath
16718 optimization option for the compiler. This option optimizes all
16719 references to named objects to the shortest possible path. The
16720 first attempt tries to utilize a single nameseg (4 characters) and
16721 the "search-to-root" algorithm used by the interpreter. If that
16722 cannot be used (because either the name is not in the search path
16723 or there is a conflict with another object with the same name),
16724 the pathname is optimized using the carat prefix (usually a
16725 shorter string than specifying the entire path from the root.)
16727 Implemented support to obtain the DSDT from the Windows registry
16728 (when the disassembly option is specified with no input file).
16729 Added this code as the implementation for AcpiOsTableOverride in
16730 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
16731 utility) to scan memory for the DSDT to the AcpiOsTableOverride
16732 function in the DOS OSL to make the disassembler truly OS
16735 Implemented a new option to disassemble and compile in one step.
16736 When used without an input filename, this option will grab the
16737 DSDT from the local machine, disassemble it, and compile it in one
16740 Added a warning message for invalid escapes (a backslash followed
16741 by any character other than the allowable escapes). This catches
16742 the quoted string error "\_SB_" (which should be "\\_SB_" ).
16744 Also, there are numerous instances in the ACPI specification where
16747 Added a compiler option to disable all optimizations. This is
16748 basically the "compatibility mode" because by using this option,
16749 the AML code will come out exactly the same as other ASL
16752 Added error messages for incorrectly ordered dependent resource
16753 functions. This includes: missing EndDependentFn macro at end of
16754 dependent resource list, nested dependent function macros (both
16755 start and end), and missing StartDependentFn macro. These are
16756 common errors that should be caught at compile time.
16758 Implemented _OSI support for the disassembler and compiler. _OSI
16759 must be included in the namespace for proper disassembly (because
16760 the disassembler must know the number of arguments.)
16762 Added an "optimization" message type that is optional (off by
16763 default). This message is used for all optimizations - including
16764 constant folding, integer optimization, and namepath optimization.
16766 ----------------------------------------
16767 25 July 2002. Summary of changes for this release.
16770 1) ACPI CA Core Subsystem Version 20020725:
16772 The AML Disassembler has been enhanced to produce compilable ASL
16773 code and has been integrated into the iASL compiler (see below) as
16774 well as the single-step disassembly for the AML debugger and the
16775 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
16776 resource templates and macros are fully supported. The
16777 disassembler has been tested on over 30 different AML files,
16778 producing identical AML when the resulting disassembled ASL file
16779 is recompiled with the same ASL compiler.
16781 Modified the Resource Manager to allow zero interrupts and zero
16782 dma channels during the GetCurrentResources call. This was
16783 causing problems on some platforms.
16785 Added the AcpiOsRedirectOutput interface to the OSL to simplify
16786 output redirection for the AcpiOsPrintf and AcpiOsVprintf
16789 Code and Data Size: Current core subsystem library sizes are shown
16790 below. These are the code and data sizes for the acpica.lib
16791 produced by the Microsoft Visual C++ 6.0 compiler, and these
16792 values do not include any ACPI driver or OSPM code. The debug
16793 version of the code includes the debug output trace mechanism and
16794 has a larger code and data size. Note that these values will vary
16795 depending on the efficiency of the compiler and the compiler
16796 options used during generation.
16799 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
16800 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
16802 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
16803 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
16808 Fixed a panic in the EC driver (Dominik Brodowski)
16810 Implemented checksum of the R/XSDT itself during Linux table scan
16816 The AML disassembler is integrated into the compiler. The "-d"
16817 option invokes the disassembler to completely disassemble an
16818 input AML file, producing as output a text ASL file with the
16819 extension ".dsl" (to avoid name collisions with existing .asl
16820 source files.) A future enhancement will allow the disassembler
16821 to obtain the BIOS DSDT from the registry under Windows.
16823 Fixed a problem with the VendorShort and VendorLong resource
16824 descriptors where an invalid AML sequence was created.
16826 Implemented a fix for BufferData term in the ASL parser. It was
16827 inadvertently defined twice, allowing invalid syntax to pass and
16828 causing reduction conflicts.
16830 Fixed a problem where the Ones opcode could get converted to a
16831 value of zero if "Ones" was used where a byte, word or dword value
16832 was expected. The 64-bit value is now truncated to the correct
16833 size with the correct value.
16837 ----------------------------------------
16838 02 July 2002. Summary of changes for this release.
16841 1) ACPI CA Core Subsystem Version 20020702:
16843 The Table Manager code has been restructured to add several new
16844 features. Tables that are not required by the core subsystem
16845 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
16846 validated in any way and are returned from AcpiGetFirmwareTable if
16847 requested. The AcpiOsTableOverride interface is now called for
16848 each table that is loaded by the subsystem in order to allow the
16849 host to override any table it chooses. Previously, only the DSDT
16850 could be overridden. Added one new files, tbrsdt.c and
16853 Fixed a problem with the conversion of internal package objects to
16854 external objects (when a package is returned from a control
16855 method.) The return buffer length was set to zero instead of the
16856 proper length of the package object.
16858 Fixed a reported problem with the use of the RefOf and DeRefOf
16859 operators when passing reference arguments to control methods. A
16860 new type of Reference object is used internally for references
16861 produced by the RefOf operator.
16863 Added additional error messages in the Resource Manager to explain
16864 AE_BAD_DATA errors when they occur during resource parsing.
16866 Split the AcpiEnableSubsystem into two primitives to enable a
16867 finer granularity initialization sequence. These two calls should
16868 be called in this order: AcpiEnableSubsystem (flags),
16869 AcpiInitializeObjects (flags). The flags parameter remains the
16875 Updated the ACPI utilities module to understand the new style of
16876 fully resolved package objects that are now returned from the core
16877 subsystem. This eliminates errors of the form:
16879 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
16880 acpi_utils-0430 [145] acpi_evaluate_reference:
16881 Invalid element in package (not a device reference)
16883 The method evaluation utility uses the new buffer allocation
16884 scheme instead of calling AcpiEvaluate Object twice.
16886 Added support for ECDT. This allows the use of the Embedded
16888 Controller before the namespace has been fully initialized, which
16889 is necessary for ACPI 2.0 support, and for some laptops to
16890 initialize properly. (Laptops using ECDT are still rare, so only
16891 limited testing was performed of the added functionality.)
16893 Fixed memory leaks in the EC driver.
16895 Eliminated a brittle code structure in acpi_bus_init().
16897 Eliminated the acpi_evaluate() helper function in utils.c. It is
16898 no longer needed since acpi_evaluate_object can optionally
16899 allocate memory for the return object.
16901 Implemented fix for keyboard hang when getting battery readings on
16902 some systems (Stephen White)
16904 PCI IRQ routing update (Dominik Brodowski)
16906 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
16909 ----------------------------------------
16910 11 June 2002. Summary of changes for this release.
16913 1) ACPI CA Core Subsystem Version 20020611:
16915 Fixed a reported problem where constants such as Zero and One
16916 appearing within _PRT packages were not handled correctly within
16917 the resource manager code. Originally reported against the ASL
16918 compiler because the code generator now optimizes integers to
16919 their minimal AML representation (i.e. AML constants if possible.)
16920 The _PRT code now handles all AML constant opcodes correctly
16921 (Zero, One, Ones, Revision).
16923 Fixed a problem with the Concatenate operator in the AML
16924 interpreter where a buffer result object was incorrectly marked as
16925 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
16927 All package sub-objects are now fully resolved before they are
16928 returned from the external ACPI interfaces. This means that name
16929 strings are resolved to object handles, and constant operators
16930 (Zero, One, Ones, Revision) are resolved to Integers.
16932 Implemented immediate resolution of the AML Constant opcodes
16933 (Zero, One, Ones, Revision) to Integer objects upon detection
16934 within the AML stream. This has simplified and reduced the
16935 generated code size of the subsystem by eliminating about 10
16936 switch statements for these constants (which previously were
16937 contained in Reference objects.) The complicating issues are that
16938 the Zero opcode is used as a "placeholder" for unspecified
16939 optional target operands and stores to constants are defined to be
16942 Code and Data Size: Current core subsystem library sizes are shown
16943 below. These are the code and data sizes for the acpica.lib
16944 produced by the Microsoft Visual C++ 6.0 compiler, and these
16945 values do not include any ACPI driver or OSPM code. The debug
16946 version of the code includes the debug output trace mechanism and
16947 has a larger code and data size. Note that these values will vary
16948 depending on the efficiency of the compiler and the compiler
16949 options used during generation.
16952 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
16953 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
16955 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
16956 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
16962 Added preliminary support for obtaining _TRA data for PCI root
16963 bridges (Bjorn Helgaas).
16966 3) iASL Compiler Version X2046:
16968 Fixed a problem where the "_DDN" reserved name was defined to be a
16969 control method with one argument. There are no arguments, and
16970 _DDN does not have to be a control method.
16972 Fixed a problem with the Linux version of the compiler where the
16973 source lines printed with error messages were the wrong lines.
16974 This turned out to be the "LF versus CR/LF" difference between
16975 Windows and Unix. This appears to be the longstanding issue
16976 concerning listing output and error messages.
16978 Fixed a problem with the Linux version of compiler where opcode
16979 names within error messages were wrong. This was caused by a
16980 slight difference in the output of the Flex tool on Linux versus
16983 Fixed a problem with the Linux compiler where the hex output files
16984 contained some garbage data caused by an internal buffer overrun.
16987 ----------------------------------------
16988 17 May 2002. Summary of changes for this release.
16991 1) ACPI CA Core Subsystem Version 20020517:
16993 Implemented a workaround to an BIOS bug discovered on the HP
16994 OmniBook where the FADT revision number and the table size are
16995 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
16996 behavior is to fallback to using only the ACPI 1.0 fields of the
16997 FADT if the table is too small to be a ACPI 2.0 table as claimed
16998 by the revision number. Although this is a BIOS bug, this is a
16999 case where the workaround is simple enough and with no side
17000 effects, so it seemed prudent to add it. A warning message is
17003 Implemented minimum size checks for the fixed-length ACPI tables -
17004 - the FADT and FACS, as well as consistency checks between the
17005 revision number and the table size.
17007 Fixed a reported problem in the table override support where the
17008 new table pointer was incorrectly treated as a physical address
17009 instead of a logical address.
17011 Eliminated the use of the AE_AML_ERROR exception and replaced it
17012 with more descriptive codes.
17014 Fixed a problem where an exception would occur if an ASL Field was
17015 defined with no named Field Units underneath it (used by some
17018 Code and Data Size: Current core subsystem library sizes are shown
17019 below. These are the code and data sizes for the acpica.lib
17020 produced by the Microsoft Visual C++ 6.0 compiler, and these
17021 values do not include any ACPI driver or OSPM code. The debug
17022 version of the code includes the debug output trace mechanism and
17023 has a larger code and data size. Note that these values will vary
17024 depending on the efficiency of the compiler and the compiler
17025 options used during generation.
17028 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
17029 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
17031 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
17032 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
17038 Much work done on ACPI init (MADT and PCI IRQ routing support).
17039 (Paul D. and Dominik Brodowski)
17041 Fix PCI IRQ-related panic on boot (Sam Revitch)
17043 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
17045 Fix "MHz" typo (Dominik Brodowski)
17047 Fix RTC year 2000 issue (Dominik Brodowski)
17049 Preclude multiple button proc entries (Eric Brunet)
17051 Moved arch-specific code out of include/platform/aclinux.h
17053 3) iASL Compiler Version X2044:
17055 Implemented error checking for the string used in the EISAID macro
17056 (Usually used in the definition of the _HID object.) The code now
17057 strictly enforces the PnP format - exactly 7 characters, 3
17058 uppercase letters and 4 hex digits.
17060 If a raw string is used in the definition of the _HID object
17061 (instead of the EISAID macro), the string must contain all
17062 alphanumeric characters (e.g., "*PNP0011" is not allowed because
17065 Implemented checking for invalid use of ACPI reserved names for
17066 most of the name creation operators (Name, Device, Event, Mutex,
17067 OperationRegion, PowerResource, Processor, and ThermalZone.)
17068 Previously, this check was only performed for control methods.
17070 Implemented an additional check on the Name operator to emit an
17071 error if a reserved name that must be implemented in ASL as a
17072 control method is used. We know that a reserved name must be a
17073 method if it is defined with input arguments.
17075 The warning emitted when a namespace object reference is not found
17076 during the cross reference phase has been changed into an error.
17077 The "External" directive should be used for names defined in other
17081 4) Tools and Utilities
17083 The 16-bit tools (adump16 and aexec16) have been regenerated and
17086 Fixed a problem with the output of both acpidump and adump16 where
17087 the indentation of closing parentheses and brackets was not
17089 aligned properly with the parent block.
17092 ----------------------------------------
17093 03 May 2002. Summary of changes for this release.
17096 1) ACPI CA Core Subsystem Version 20020503:
17098 Added support a new OSL interface that allows the host operating
17100 system software to override the DSDT found in the firmware -
17101 AcpiOsTableOverride. With this interface, the OSL can examine the
17102 version of the firmware DSDT and replace it with a different one
17105 Added new external interfaces for accessing ACPI registers from
17106 device drivers and other system software - AcpiGetRegister and
17107 AcpiSetRegister. This was simply an externalization of the
17108 existing AcpiHwBitRegister interfaces.
17110 Fixed a regression introduced in the previous build where the
17111 ASL/AML CreateField operator always returned an error,
17112 "destination must be a NS Node".
17114 Extended the maximum time (before failure) to successfully enable
17115 ACPI mode to 3 seconds.
17117 Code and Data Size: Current core subsystem library sizes are shown
17118 below. These are the code and data sizes for the acpica.lib
17119 produced by the Microsoft Visual C++ 6.0 compiler, and these
17120 values do not include any ACPI driver or OSPM code. The debug
17121 version of the code includes the debug output trace mechanism and
17122 has a larger code and data size. Note that these values will vary
17123 depending on the efficiency of the compiler and the compiler
17124 options used during generation.
17127 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
17128 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
17130 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
17131 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
17136 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
17137 free. While 3 out of 4 of our in-house systems work fine, the last
17138 one still hangs when testing the LAPIC timer.
17140 Renamed many files in 2.5 kernel release to omit "acpi_" from the
17143 Added warning on boot for Presario 711FR.
17145 Sleep improvements (Pavel Machek)
17147 ACPI can now be built without CONFIG_PCI enabled.
17149 IA64: Fixed memory map functions (JI Lee)
17152 3) iASL Compiler Version X2043:
17154 Added support to allow the compiler to be integrated into the MS
17155 VC++ development environment for one-button compilation of single
17156 files or entire projects -- with error-to-source-line mapping.
17158 Implemented support for compile-time constant folding for the
17159 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
17160 specification. This allows the ASL writer to use expressions
17161 instead of Integer/Buffer/String constants in terms that must
17162 evaluate to constants at compile time and will also simplify the
17163 emitted AML in any such sub-expressions that can be folded
17164 (evaluated at compile-time.) This increases the size of the
17165 compiler significantly because a portion of the ACPI CA AML
17166 interpreter is included within the compiler in order to pre-
17167 evaluate constant expressions.
17170 Fixed a problem with the "Unicode" ASL macro that caused the
17171 compiler to fault. (This macro is used in conjunction with the
17172 _STR reserved name.)
17174 Implemented an AML opcode optimization to use the Zero, One, and
17175 Ones opcodes where possible to further reduce the size of integer
17176 constants and thus reduce the overall size of the generated AML
17179 Implemented error checking for new reserved terms for ACPI version
17182 Implemented the -qr option to display the current list of ACPI
17183 reserved names known to the compiler.
17185 Implemented the -qc option to display the current list of ASL
17186 operators that are allowed within constant expressions and can
17187 therefore be folded at compile time if the operands are constants.
17192 Updated the Programmer's Reference for new interfaces, data types,
17193 and memory allocation model options.
17195 Updated the iASL Compiler User Reference to apply new format and
17196 add information about new features and options.
17198 ----------------------------------------
17199 19 April 2002. Summary of changes for this release.
17201 1) ACPI CA Core Subsystem Version 20020419:
17203 The source code base for the Core Subsystem has been completely
17204 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
17205 versions. The Lint option files used are included in the
17206 /acpi/generate/lint directory.
17208 Implemented enhanced status/error checking across the entire
17209 Hardware manager subsystem. Any hardware errors (reported from
17210 the OSL) are now bubbled up and will abort a running control
17214 Fixed a problem where the per-ACPI-table integer width (32 or 64)
17215 was stored only with control method nodes, causing a fault when
17216 non-control method code was executed during table loading. The
17217 solution implemented uses a global variable to indicate table
17218 width across the entire ACPI subsystem. Therefore, ACPI CA does
17219 not support mixed integer widths across different ACPI tables
17222 Fixed a problem where NULL extended fields (X fields) in an ACPI
17223 2.0 ACPI FADT caused the table load to fail. Although the
17224 existing ACPI specification is a bit fuzzy on this topic, the new
17225 behavior is to fall back on a ACPI 1.0 field if the corresponding
17226 ACPI 2.0 X field is zero (even though the table revision indicates
17227 a full ACPI 2.0 table.) The ACPI specification will be updated to
17228 clarify this issue.
17230 Fixed a problem with the SystemMemory operation region handler
17231 where memory was always accessed byte-wise even if the AML-
17232 specified access width was larger than a byte. This caused
17233 problems on systems with memory-mapped I/O. Memory is now
17234 accessed with the width specified. On systems that do not support
17235 non-aligned transfers, a check is made to guarantee proper address
17236 alignment before proceeding in order to avoid an AML-caused
17237 alignment fault within the kernel.
17240 Fixed a problem with the ExtendedIrq resource where only one byte
17241 of the 4-byte Irq field was extracted.
17243 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
17244 function was out of date and required a rewrite.
17246 Code and Data Size: Current core subsystem library sizes are shown
17247 below. These are the code and data sizes for the acpica.lib
17248 produced by the Microsoft Visual C++ 6.0 compiler, and these
17249 values do not include any ACPI driver or OSPM code. The debug
17250 version of the code includes the debug output trace mechanism and
17251 has a larger code and data size. Note that these values will vary
17252 depending on the efficiency of the compiler and the compiler
17253 options used during generation.
17256 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
17257 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
17259 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
17260 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
17265 PCI IRQ routing fixes (Dominik Brodowski)
17268 3) iASL Compiler Version X2042:
17270 Implemented an additional compile-time error check for a field
17271 unit whose size + minimum access width would cause a run-time
17272 access beyond the end-of-region. Previously, only the field size
17273 itself was checked.
17275 The Core subsystem and iASL compiler now share a common parse
17276 object in preparation for compile-time evaluation of the type
17277 3/4/5 ASL operators.
17280 ----------------------------------------
17281 Summary of changes for this release: 03_29_02
17283 1) ACPI CA Core Subsystem Version 20020329:
17285 Implemented support for late evaluation of TermArg operands to
17286 Buffer and Package objects. This allows complex expressions to be
17287 used in the declarations of these object types.
17289 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
17290 1.0, if the field was larger than 32 bits, it was returned as a
17291 buffer - otherwise it was returned as an integer. In ACPI 2.0,
17292 the field is returned as a buffer only if the field is larger than
17293 64 bits. The TableRevision is now considered when making this
17294 conversion to avoid incompatibility with existing ASL code.
17296 Implemented logical addressing for AcpiOsGetRootPointer. This
17297 allows an RSDP with either a logical or physical address. With
17298 this support, the host OS can now override all ACPI tables with
17299 one logical RSDP. Includes implementation of "typed" pointer
17300 support to allow a common data type for both physical and logical
17301 pointers internally. This required a change to the
17302 AcpiOsGetRootPointer interface.
17304 Implemented the use of ACPI 2.0 Generic Address Structures for all
17305 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
17306 mapped I/O for these ACPI features.
17308 Initialization now ignores not only non-required tables (All
17309 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
17310 not validate the table headers of unrecognized tables.
17312 Fixed a problem where a notify handler could only be
17313 installed/removed on an object of type Device. All "notify"
17315 objects are now supported -- Devices, Processor, Power, and
17318 Removed most verbosity from the ACPI_DB_INFO debug level. Only
17319 critical information is returned when this debug level is enabled.
17321 Code and Data Size: Current core subsystem library sizes are shown
17322 below. These are the code and data sizes for the acpica.lib
17323 produced by the Microsoft Visual C++ 6.0 compiler, and these
17324 values do not include any ACPI driver or OSPM code. The debug
17325 version of the code includes the debug output trace mechanism and
17326 has a larger code and data size. Note that these values will vary
17327 depending on the efficiency of the compiler and the compiler
17328 options used during generation.
17331 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
17332 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
17334 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
17335 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
17340 The processor driver (acpi_processor.c) now fully supports ACPI
17341 2.0-based processor performance control (e.g. Intel(R)
17342 SpeedStep(TM) technology) Note that older laptops that only have
17343 the Intel "applet" interface are not supported through this. The
17344 'limit' and 'performance' interface (/proc) are fully functional.
17345 [Note that basic policy for controlling performance state
17346 transitions will be included in the next version of ospmd.] The
17347 idle handler was modified to more aggressively use C2, and PIIX4
17348 errata handling underwent a complete overhaul (big thanks to
17349 Dominik Brodowski).
17351 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
17352 based devices in the ACPI namespace are now dynamically bound
17353 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
17354 This allows, among other things, ACPI to resolve bus numbers for
17355 subordinate PCI bridges.
17357 Enhanced PCI IRQ routing to get the proper bus number for _PRT
17358 entries defined underneath PCI bridges.
17360 Added IBM 600E to bad bios list due to invalid _ADR value for
17361 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
17363 In the process of adding full MADT support (e.g. IOAPIC) for IA32
17364 (acpi.c, mpparse.c) -- stay tuned.
17366 Added back visual differentiation between fixed-feature and
17367 control-method buttons in dmesg. Buttons are also subtyped (e.g.
17368 button/power/PWRF) to simplify button identification.
17370 We no longer use -Wno-unused when compiling debug. Please ignore
17371 any "_THIS_MODULE defined but not used" messages.
17373 Can now shut down the system using "magic sysrq" key.
17376 3) iASL Compiler version 2041:
17378 Fixed a problem where conversion errors for hex/octal/decimal
17379 constants were not reported.
17381 Implemented a fix for the General Register template Address field.
17382 This field was 8 bits when it should be 64.
17384 Fixed a problem where errors/warnings were no longer being emitted
17385 within the listing output file.
17387 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
17388 exactly 4 characters, alphanumeric only.
17393 ----------------------------------------
17394 Summary of changes for this release: 03_08_02
17397 1) ACPI CA Core Subsystem Version 20020308:
17399 Fixed a problem with AML Fields where the use of the "AccessAny"
17400 keyword could cause an interpreter error due to attempting to read
17401 or write beyond the end of the parent Operation Region.
17403 Fixed a problem in the SystemMemory Operation Region handler where
17404 an attempt was made to map memory beyond the end of the region.
17405 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
17406 errors on some Linux systems.
17408 Fixed a problem where the interpreter/namespace "search to root"
17409 algorithm was not functioning for some object types. Relaxed the
17410 internal restriction on the search to allow upsearches for all
17411 external object types as well as most internal types.
17416 We now use safe_halt() macro versus individual calls to sti | hlt.
17418 Writing to the processor limit interface should now work. "echo 1"
17419 will increase the limit, 2 will decrease, and 0 will reset to the
17426 Fixed segfault on Linux version.
17429 ----------------------------------------
17430 Summary of changes for this release: 02_25_02
17432 1) ACPI CA Core Subsystem:
17435 Fixed a problem where the GPE bit masks were not initialized
17436 properly, causing erratic GPE behavior.
17438 Implemented limited support for multiple calling conventions. The
17439 code can be generated with either the VPL (variable parameter
17440 list, or "C") convention, or the FPL (fixed parameter list, or
17441 "Pascal") convention. The core subsystem is about 3.4% smaller
17442 when generated with FPL.
17447 Re-add some /proc/acpi/event functionality that was lost during
17450 Resolved issue with /proc events for fixed-feature buttons showing
17451 up as the system device.
17453 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
17455 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
17457 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
17459 Fixed limit interface & usage to fix bugs with passive cooling
17462 Restructured PRT support.
17465 ----------------------------------------
17466 Summary of changes for this label: 02_14_02
17469 1) ACPI CA Core Subsystem:
17471 Implemented support in AcpiLoadTable to allow loading of FACS and
17474 Support for the now-obsolete interim 0.71 64-bit ACPI tables has
17475 been removed. All 64-bit platforms should be migrated to the ACPI
17476 2.0 tables. The actbl71.h header has been removed from the source
17479 All C macros defined within the subsystem have been prefixed with
17480 "ACPI_" to avoid collision with other system include files.
17482 Removed the return value for the two AcpiOsPrint interfaces, since
17483 it is never used and causes lint warnings for ignoring the return
17486 Added error checking to all internal mutex acquire and release
17487 calls. Although a failure from one of these interfaces is
17488 probably a fatal system error, these checks will cause the
17489 immediate abort of the currently executing method or interface.
17491 Fixed a problem where the AcpiSetCurrentResources interface could
17492 fault. This was a side effect of the deployment of the new memory
17495 Fixed a couple of problems with the Global Lock support introduced
17496 in the last major build. The "common" (1.0/2.0) internal FACS was
17497 being overwritten with the FACS signature and clobbering the
17498 Global Lock pointer. Also, the actual firmware FACS was being
17499 unmapped after construction of the "common" FACS, preventing
17500 access to the actual Global Lock field within it. The "common"
17501 internal FACS is no longer installed as an actual ACPI table; it
17502 is used simply as a global.
17504 Code and Data Size: Current core subsystem library sizes are shown
17505 below. These are the code and data sizes for the acpica.lib
17506 produced by the Microsoft Visual C++ 6.0 compiler, and these
17507 values do not include any ACPI driver or OSPM code. The debug
17508 version of the code includes the debug output trace mechanism and
17509 has a larger code and data size. Note that these values will vary
17510 depending on the efficiency of the compiler and the compiler
17511 options used during generation.
17513 Previous Release (02_07_01)
17514 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
17515 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
17517 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
17518 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
17523 Updated Linux-specific code for core macro and OSL interface
17524 changes described above.
17526 Improved /proc/acpi/event. It now can be opened only once and has
17527 proper poll functionality.
17529 Fixed and restructured power management (acpi_bus).
17531 Only create /proc "view by type" when devices of that class exist.
17533 Fixed "charging/discharging" bug (and others) in acpi_battery.
17535 Improved thermal zone code.
17538 3) ASL Compiler, version X2039:
17541 Implemented the new compiler restriction on ASL String hex/octal
17542 escapes to non-null, ASCII values. An error results if an invalid
17543 value is used. (This will require an ACPI 2.0 specification
17546 AML object labels that are output to the optional C and ASM source
17547 are now prefixed with both the ACPI table signature and table ID
17548 to help guarantee uniqueness within a large BIOS project.
17551 ----------------------------------------
17552 Summary of changes for this label: 02_01_02
17554 1) ACPI CA Core Subsystem:
17556 ACPI 2.0 support is complete in the entire Core Subsystem and the
17557 ASL compiler. All new ACPI 2.0 operators are implemented and all
17558 other changes for ACPI 2.0 support are complete. With
17559 simultaneous code and data optimizations throughout the subsystem,
17560 ACPI 2.0 support has been implemented with almost no additional
17561 cost in terms of code and data size.
17563 Implemented a new mechanism for allocation of return buffers. If
17564 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
17565 be allocated on behalf of the caller. Consolidated all return
17566 buffer validation and allocation to a common procedure. Return
17567 buffers will be allocated via the primary OSL allocation interface
17568 since it appears that a separate pool is not needed by most users.
17569 If a separate pool is required for these buffers, the caller can
17570 still use the original mechanism and pre-allocate the buffer(s).
17572 Implemented support for string operands within the DerefOf
17575 Restructured the Hardware and Event managers to be table driven,
17576 simplifying the source code and reducing the amount of generated
17579 Split the common read/write low-level ACPI register bitfield
17580 procedure into a separate read and write, simplifying the code
17583 Obsoleted the AcpiOsCallocate OSL interface. This interface was
17584 used only a handful of times and didn't have enough critical mass
17585 for a separate interface. Replaced with a common calloc procedure
17588 Fixed a reported problem with the GPE number mapping mechanism
17589 that allows GPE1 numbers to be non-contiguous with GPE0.
17590 Reorganized the GPE information and shrunk a large array that was
17591 originally large enough to hold info for all possible GPEs (256)
17592 to simply large enough to hold all GPEs up to the largest GPE
17593 number on the machine.
17595 Fixed a reported problem with resource structure alignment on 64-
17598 Changed the AcpiEnableEvent and AcpiDisableEvent external
17599 interfaces to not require any flags for the common case of
17600 enabling/disabling a GPE.
17602 Implemented support to allow a "Notify" on a Processor object.
17604 Most TBDs in comments within the source code have been resolved
17608 Fixed a problem in the interpreter where a standalone parent
17609 prefix (^) was not handled correctly in the interpreter and
17612 Removed obsolete and unnecessary GPE save/restore code.
17614 Implemented Field support in the ASL Load operator. This allows a
17615 table to be loaded from a named field, in addition to loading a
17616 table directly from an Operation Region.
17618 Implemented timeout and handle support in the external Global Lock
17621 Fixed a problem in the AcpiDump utility where pathnames were no
17622 longer being generated correctly during the dump of named objects.
17624 Modified the AML debugger to give a full display of if/while
17625 predicates instead of just one AML opcode at a time. (The
17626 predicate can have several nested ASL statements.) The old method
17627 was confusing during single stepping.
17629 Code and Data Size: Current core subsystem library sizes are shown
17630 below. These are the code and data sizes for the acpica.lib
17631 produced by the Microsoft Visual C++ 6.0 compiler, and these
17632 values do not include any ACPI driver or OSPM code. The debug
17633 version of the code includes the debug output trace mechanism and
17634 has a larger code and data size. Note that these values will vary
17635 depending on the efficiency of the compiler and the compiler
17636 options used during generation.
17638 Previous Release (12_18_01)
17639 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
17640 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
17642 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
17643 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
17647 Implemented fix for PIIX reverse throttling errata (Processor
17650 Added new Limit interface (Processor and Thermal drivers)
17652 New thermal policy (Thermal driver)
17654 Many updates to /proc
17656 Battery "low" event support (Battery driver)
17658 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
17660 IA32 - IA64 initialization unification, no longer experimental
17662 Menuconfig options redesigned
17664 3) ASL Compiler, version X2037:
17666 Implemented several new output features to simplify integration of
17667 AML code into firmware: 1) Output the AML in C source code with
17668 labels for each named ASL object. The original ASL source code
17669 is interleaved as C comments. 2) Output the AML in ASM source code
17670 with labels and interleaved ASL source. 3) Output the AML in
17671 raw hex table form, in either C or ASM.
17673 Implemented support for optional string parameters to the
17674 LoadTable operator.
17676 Completed support for embedded escape sequences within string
17677 literals. The compiler now supports all single character escapes
17678 as well as the Octal and Hex escapes. Note: the insertion of a
17679 null byte into a string literal (via the hex/octal escape) causes
17680 the string to be immediately terminated. A warning is issued.
17682 Fixed a problem where incorrect AML was generated for the case
17683 where an ASL namepath consists of a single parent prefix (
17685 ) with no trailing name segments.
17687 The compiler has been successfully generated with a 64-bit C
17693 ----------------------------------------
17694 Summary of changes for this label: 12_18_01
17698 Enhanced blacklist with reason and severity fields. Any table's
17699 signature may now be used to identify a blacklisted system.
17701 Call _PIC control method to inform the firmware which interrupt
17702 model the OS is using. Turn on any disabled link devices.
17704 Cleaned up busmgr /proc error handling (Andreas Dilger)
17706 2) ACPI CA Core Subsystem:
17708 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
17711 Completed implementation of the ACPI 2.0 "Continue",
17712 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
17713 operators. All new ACPI 2.0 operators are now implemented in both
17714 the ASL compiler and the AML interpreter. The only remaining ACPI
17715 2.0 task is support for the String data type in the DerefOf
17716 operator. Fixed a problem with AcquireMutex where the status code
17717 was lost if the caller had to actually wait for the mutex.
17719 Increased the maximum ASL Field size from 64K bits to 4G bits.
17721 Completed implementation of the external Global Lock interfaces --
17722 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
17723 Handler parameters were added.
17725 Completed another pass at removing warnings and issues when
17726 compiling with 64-bit compilers. The code now compiles cleanly
17727 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
17728 add and subtract (diff) macros have changed considerably.
17731 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
17732 64-bit platforms, 32-bits on all others. This type is used
17733 wherever memory allocation and/or the C sizeof() operator is used,
17734 and affects the OSL memory allocation interfaces AcpiOsAllocate
17735 and AcpiOsCallocate.
17737 Implemented sticky user breakpoints in the AML debugger.
17739 Code and Data Size: Current core subsystem library sizes are shown
17740 below. These are the code and data sizes for the acpica.lib
17741 produced by the Microsoft Visual C++ 6.0 compiler, and these
17742 values do not include any ACPI driver or OSPM code. The debug
17743 version of the code includes the debug output trace mechanism and
17744 has a larger code and data size. Note that these values will vary
17745 depending on the efficiency of the compiler and the compiler
17746 options used during generation.
17748 Previous Release (12_05_01)
17749 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
17750 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
17752 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
17753 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
17755 3) ASL Compiler, version X2034:
17757 Now checks for (and generates an error if detected) the use of a
17758 Break or Continue statement without an enclosing While statement.
17761 Successfully generated the compiler with the Intel 64-bit C
17764 ----------------------------------------
17765 Summary of changes for this label: 12_05_01
17767 1) ACPI CA Core Subsystem:
17769 The ACPI 2.0 CopyObject operator is fully implemented. This
17770 operator creates a new copy of an object (and is also used to
17771 bypass the "implicit conversion" mechanism of the Store operator.)
17773 The ACPI 2.0 semantics for the SizeOf operator are fully
17774 implemented. The change is that performing a SizeOf on a
17775 reference object causes an automatic dereference of the object to
17776 the actual value before the size is evaluated. This behavior was
17777 undefined in ACPI 1.0.
17779 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
17780 have been implemented. The interrupt polarity and mode are now
17783 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
17784 appearing in Package objects were not properly converted to
17785 integers when the internal Package was converted to an external
17786 object (via the AcpiEvaluateObject interface.)
17788 Fixed a problem with the namespace object deletion mechanism for
17789 objects created by control methods. There were two parts to this
17790 problem: 1) Objects created during the initialization phase method
17791 parse were not being deleted, and 2) The object owner ID mechanism
17792 to track objects was broken.
17794 Fixed a problem where the use of the ASL Scope operator within a
17795 control method would result in an invalid opcode exception.
17797 Fixed a problem introduced in the previous label where the buffer
17798 length required for the _PRT structure was not being returned
17801 Code and Data Size: Current core subsystem library sizes are shown
17802 below. These are the code and data sizes for the acpica.lib
17803 produced by the Microsoft Visual C++ 6.0 compiler, and these
17804 values do not include any ACPI driver or OSPM code. The debug
17805 version of the code includes the debug output trace mechanism and
17806 has a larger code and data size. Note that these values will vary
17807 depending on the efficiency of the compiler and the compiler
17808 options used during generation.
17810 Previous Release (11_20_01)
17811 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
17812 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
17815 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
17816 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
17820 Updated all files to apply cleanly against 2.4.16.
17822 Added basic PCI Interrupt Routing Table (PRT) support for IA32
17823 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
17824 version supports both static and dynamic PRT entries, but dynamic
17825 entries are treated as if they were static (not yet
17826 reconfigurable). Architecture- specific code to use this data is
17827 absent on IA32 but should be available shortly.
17829 Changed the initialization sequence to start the ACPI interpreter
17830 (acpi_init) prior to initialization of the PCI driver (pci_init)
17831 in init/main.c. This ordering is required to support PRT and
17832 facilitate other (future) enhancement. A side effect is that the
17833 ACPI bus driver and certain device drivers can no longer be loaded
17836 Modified the 'make menuconfig' options to allow PCI Interrupt
17837 Routing support to be included without the ACPI Bus and other
17840 3) ASL Compiler, version X2033:
17842 Fixed some issues with the use of the new CopyObject and
17843 DataTableRegion operators. Both are fully functional.
17845 ----------------------------------------
17846 Summary of changes for this label: 11_20_01
17848 20 November 2001. Summary of changes for this release.
17850 1) ACPI CA Core Subsystem:
17852 Updated Index support to match ACPI 2.0 semantics. Storing a
17853 Integer, String, or Buffer to an Index of a Buffer will store only
17854 the least-significant byte of the source to the Indexed buffer
17855 byte. Multiple writes are not performed.
17857 Fixed a problem where the access type used in an AccessAs ASL
17858 operator was not recorded correctly into the field object.
17860 Fixed a problem where ASL Event objects were created in a
17861 signalled state. Events are now created in an unsignalled state.
17863 The internal object cache is now purged after table loading and
17864 initialization to reduce the use of dynamic kernel memory -- on
17865 the assumption that object use is greatest during the parse phase
17866 of the entire table (versus the run-time use of individual control
17869 ACPI 2.0 variable-length packages are now fully operational.
17871 Code and Data Size: Code and Data optimizations have permitted new
17872 feature development with an actual reduction in the library size.
17873 Current core subsystem library sizes are shown below. These are
17874 the code and data sizes for the acpica.lib produced by the
17875 Microsoft Visual C++ 6.0 compiler, and these values do not include
17876 any ACPI driver or OSPM code. The debug version of the code
17877 includes the debug output trace mechanism and has a larger code
17878 and data size. Note that these values will vary depending on the
17879 efficiency of the compiler and the compiler options used during
17882 Previous Release (11_09_01):
17883 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
17884 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
17887 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
17888 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
17892 Enhanced the ACPI boot-time initialization code to allow the use
17893 of Local APIC tables for processor enumeration on IA-32, and to
17894 pave the way for a fully MPS-free boot (on SMP systems) in the
17895 near future. This functionality replaces
17896 arch/i386/kernel/acpitables.c, which was introduced in an earlier
17897 2.4.15-preX release. To enable this feature you must add
17898 "acpi_boot=on" to the kernel command line -- see the help entry
17899 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
17902 Restructured the configuration options to allow boot-time table
17903 parsing support without inclusion of the ACPI Interpreter (and
17906 NOTE: This release does not include fixes for the reported events,
17907 power-down, and thermal passive cooling issues (coming soon).
17911 Added additional typechecking for Fields within restricted access
17912 Operation Regions. All fields within EC and CMOS regions must be
17913 declared with ByteAcc. All fields within SMBus regions must be
17914 declared with the BufferAcc access type.
17916 Fixed a problem where the listing file output of control methods
17917 no longer interleaved the actual AML code with the ASL source
17923 ----------------------------------------
17924 Summary of changes for this label: 11_09_01
17926 1) ACPI CA Core Subsystem:
17928 Implemented ACPI 2.0-defined support for writes to fields with a
17929 Buffer, String, or Integer source operand that is smaller than the
17930 target field. In these cases, the source operand is zero-extended
17931 to fill the target field.
17933 Fixed a problem where a Field starting bit offset (within the
17934 parent operation region) was calculated incorrectly if the
17936 alignment of the field differed from the access width. This
17937 affected CreateWordField, CreateDwordField, CreateQwordField, and
17938 possibly other fields that use the "AccessAny" keyword.
17940 Fixed a problem introduced in the 11_02_01 release where indirect
17941 stores through method arguments did not operate correctly.
17945 Implemented boot-time ACPI table parsing support
17946 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
17947 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
17948 legacy BIOS interfaces (e.g. MPS) for the configuration of system
17949 processors, memory, and interrupts during setup_arch(). Note that
17950 this patch does not include the required architecture-specific
17951 changes required to apply this information -- subsequent patches
17952 will be posted for both IA32 and IA64 to achieve this.
17954 Added low-level sleep support for IA32 platforms, courtesy of Pat
17955 Mochel. This allows IA32 systems to transition to/from various
17956 sleeping states (e.g. S1, S3), although the lack of a centralized
17957 driver model and power-manageable drivers will prevent its
17958 (successful) use on most systems.
17960 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
17961 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
17962 tables" option, etc.
17964 Increased the default timeout for the EC driver from 1ms to 10ms
17965 (1000 cycles of 10us) to try to address AE_TIME errors during EC
17968 ----------------------------------------
17969 Summary of changes for this label: 11_02_01
17971 1) ACPI CA Core Subsystem:
17973 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
17974 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
17977 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
17978 changes to support ACPI 2.0 Qword field access. Read/Write
17979 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
17980 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
17981 the value parameter for the address space handler interface is now
17982 an ACPI_INTEGER. OSL implementations of these interfaces must now
17983 handle the case where the Width parameter is 64.
17985 Index Fields: Fixed a problem where unaligned bit assembly and
17986 disassembly for IndexFields was not supported correctly.
17988 Index and Bank Fields: Nested Index and Bank Fields are now
17989 supported. During field access, a check is performed to ensure
17990 that the value written to an Index or Bank register is not out of
17991 the range of the register. The Index (or Bank) register is
17992 written before each access to the field data. Future support will
17993 include allowing individual IndexFields to be wider than the
17994 DataRegister width.
17996 Fields: Fixed a problem where the AML interpreter was incorrectly
17997 attempting to write beyond the end of a Field/OpRegion. This was
17998 a boundary case that occurred when a DWORD field was written to a
17999 BYTE access OpRegion, forcing multiple writes and causing the
18000 interpreter to write one datum too many.
18002 Fields: Fixed a problem with Field/OpRegion access where the
18003 starting bit address of a field was incorrectly calculated if the
18004 current access type was wider than a byte (WordAcc, DwordAcc, or
18007 Fields: Fixed a problem where forward references to individual
18008 FieldUnits (individual Field names within a Field definition) were
18009 not resolved during the AML table load.
18011 Fields: Fixed a problem where forward references from a Field
18012 definition to the parent Operation Region definition were not
18013 resolved during the AML table load.
18015 Fields: Duplicate FieldUnit names within a scope are now detected
18016 during AML table load.
18018 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
18019 returned an incorrect name for the root node.
18021 Code and Data Size: Code and Data optimizations have permitted new
18022 feature development with an actual reduction in the library size.
18023 Current core subsystem library sizes are shown below. These are
18024 the code and data sizes for the acpica.lib produced by the
18025 Microsoft Visual C++ 6.0 compiler, and these values do not include
18026 any ACPI driver or OSPM code. The debug version of the code
18027 includes the debug output trace mechanism and has a larger code
18028 and data size. Note that these values will vary depending on the
18029 efficiency of the compiler and the compiler options used during
18032 Previous Release (10_18_01):
18033 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
18034 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
18037 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
18038 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
18042 Improved /proc processor output (Pavel Machek) Re-added
18043 MODULE_LICENSE("GPL") to all modules.
18045 3) ASL Compiler version X2030:
18047 Duplicate FieldUnit names within a scope are now detected and
18052 Programmer Reference updated to reflect OSL and address space
18053 handler interface changes described above.
18055 ----------------------------------------
18056 Summary of changes for this label: 10_18_01
18058 ACPI CA Core Subsystem:
18060 Fixed a problem with the internal object reference count mechanism
18061 that occasionally caused premature object deletion. This resolves
18062 all of the outstanding problem reports where an object is deleted
18063 in the middle of an interpreter evaluation. Although this problem
18064 only showed up in rather obscure cases, the solution to the
18065 problem involved an adjustment of all reference counts involving
18066 objects attached to namespace nodes.
18068 Fixed a problem with Field support in the interpreter where
18069 writing to an aligned field whose length is an exact multiple (2
18070 or greater) of the field access granularity would cause an attempt
18071 to write beyond the end of the field.
18073 The top level AML opcode execution functions within the
18074 interpreter have been renamed with a more meaningful and
18075 consistent naming convention. The modules exmonad.c and
18076 exdyadic.c were eliminated. New modules are exoparg1.c,
18077 exoparg2.c, exoparg3.c, and exoparg6.c.
18079 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
18081 Fixed a problem where the AML debugger was causing some internal
18082 objects to not be deleted during subsystem termination.
18084 Fixed a problem with the external AcpiEvaluateObject interface
18085 where the subsystem would fault if the named object to be
18086 evaluated referred to a constant such as Zero, Ones, etc.
18088 Fixed a problem with IndexFields and BankFields where the
18089 subsystem would fault if the index, data, or bank registers were
18090 not defined in the same scope as the field itself.
18092 Added printf format string checking for compilers that support
18093 this feature. Corrected more than 50 instances of issues with
18094 format specifiers within invocations of ACPI_DEBUG_PRINT
18095 throughout the core subsystem code.
18097 The ASL "Revision" operator now returns the ACPI support level
18098 implemented in the core - the value "2" since the ACPI 2.0 support
18099 is more than 50% implemented.
18101 Enhanced the output of the AML debugger "dump namespace" command
18102 to output in a more human-readable form.
18104 Current core subsystem library code sizes are shown below. These
18106 are the code and data sizes for the acpica.lib produced by the
18107 Microsoft Visual C++ 6.0 compiler, and these values do not include
18108 any ACPI driver or OSPM code. The debug version of the code
18109 includes the full debug trace mechanism -- leading to a much
18111 larger code and data size. Note that these values will vary
18112 depending on the efficiency of the compiler and the compiler
18113 options used during generation.
18115 Previous Label (09_20_01):
18116 Non-Debug Version: 65K Code, 5K Data, 70K Total
18117 Debug Version: 138K Code, 58K Data, 196K Total
18121 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
18122 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
18126 Implemented a "Bad BIOS Blacklist" to track machines that have
18127 known ASL/AML problems.
18129 Enhanced the /proc interface for the thermal zone driver and added
18130 support for _HOT (the critical suspend trip point). The 'info'
18131 file now includes threshold/policy information, and allows setting
18132 of _SCP (cooling preference) and _TZP (polling frequency) values
18133 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
18134 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
18135 preference to the passive/quiet mode (if supported by the ASL).
18137 Implemented a workaround for a gcc bug that resuted in an OOPs
18138 when loading the control method battery driver.
18140 ----------------------------------------
18141 Summary of changes for this label: 09_20_01
18143 ACPI CA Core Subsystem:
18145 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
18146 modified to allow individual GPE levels to be flagged as wake-
18147 enabled (i.e., these GPEs are to remain enabled when the platform
18150 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
18151 support wake-enabled GPEs. This means that upon entering the
18152 sleep state, all GPEs that are not wake-enabled are disabled.
18153 When leaving the sleep state, these GPEs are re-enabled.
18155 A local double-precision divide/modulo module has been added to
18156 enhance portability to OS kernels where a 64-bit math library is
18157 not available. The new module is "utmath.c".
18159 Several optimizations have been made to reduce the use of CPU
18160 stack. Originally over 2K, the maximum stack usage is now below
18161 2K at 1860 bytes (1.82k)
18163 Fixed a problem with the AcpiGetFirmwareTable interface where the
18164 root table pointer was not mapped into a logical address properly.
18166 Fixed a problem where a NULL pointer was being dereferenced in the
18167 interpreter code for the ASL Notify operator.
18169 Fixed a problem where the use of the ASL Revision operator
18170 returned an error. This operator now returns the current version
18171 of the ACPI CA core subsystem.
18173 Fixed a problem where objects passed as control method parameters
18174 to AcpiEvaluateObject were always deleted at method termination.
18175 However, these objects may end up being stored into the namespace
18176 by the called method. The object reference count mechanism was
18177 applied to these objects instead of a force delete.
18179 Fixed a problem where static strings or buffers (contained in the
18180 AML code) that are declared as package elements within the ASL
18181 code could cause a fault because the interpreter would attempt to
18182 delete them. These objects are now marked with the "static
18183 object" flag to prevent any attempt to delete them.
18185 Implemented an interpreter optimization to use operands directly
18186 from the state object instead of extracting the operands to local
18187 variables. This reduces stack use and code size, and improves
18190 The module exxface.c was eliminated as it was an unnecessary extra
18193 Current core subsystem library code sizes are shown below. These
18194 are the code and data sizes for the acpica.lib produced by the
18195 Microsoft Visual C++ 6.0 compiler, and these values do not include
18196 any ACPI driver or OSPM code. The debug version of the code
18197 includes the full debug trace mechanism -- leading to a much
18198 larger code and data size. Note that these values will vary
18199 depending on the efficiency of the compiler and the compiler
18200 options used during generation.
18202 Non-Debug Version: 65K Code, 5K Data, 70K Total
18203 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
18204 Total (Previously 195K)
18208 Support for ACPI 2.0 64-bit integers has been added. All ACPI
18209 Integer objects are now 64 bits wide
18211 All Acpi data types and structures are now in lower case. Only
18212 Acpi macros are upper case for differentiation.
18216 Changes to the external interfaces as described above.
18218 ----------------------------------------
18219 Summary of changes for this label: 08_31_01
18221 ACPI CA Core Subsystem:
18223 A bug with interpreter implementation of the ASL Divide operator
18224 was found and fixed. The implicit function return value (not the
18225 explicit store operands) was returning the remainder instead of
18226 the quotient. This was a longstanding bug and it fixes several
18227 known outstanding issues on various platforms.
18229 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
18230 been further optimized for size. There are 700 invocations of the
18231 DEBUG_PRINT macro alone, so each optimization reduces the size of
18232 the debug version of the subsystem significantly.
18234 A stack trace mechanism has been implemented. The maximum stack
18235 usage is about 2K on 32-bit platforms. The debugger command "stat
18236 stack" will display the current maximum stack usage.
18238 All public symbols and global variables within the subsystem are
18239 now prefixed with the string "Acpi". This keeps all of the
18240 symbols grouped together in a kernel map, and avoids conflicts
18241 with other kernel subsystems.
18243 Most of the internal fixed lookup tables have been moved into the
18244 code segment via the const operator.
18246 Several enhancements have been made to the interpreter to both
18247 reduce the code size and improve performance.
18249 Current core subsystem library code sizes are shown below. These
18250 are the code and data sizes for the acpica.lib produced by the
18251 Microsoft Visual C++ 6.0 compiler, and these values do not include
18252 any ACPI driver or OSPM code. The debug version of the code
18253 includes the full debug trace mechanism which contains over 700
18254 invocations of the DEBUG_PRINT macro, 500 function entry macro
18255 invocations, and over 900 function exit macro invocations --
18256 leading to a much larger code and data size. Note that these
18257 values will vary depending on the efficiency of the compiler and
18258 the compiler options used during generation.
18260 Non-Debug Version: 64K Code, 5K Data, 69K Total
18261 Debug Version: 137K Code, 58K Data, 195K Total
18265 Implemented wbinvd() macro, pending a kernel-wide definition.
18267 Fixed /proc/acpi/event to handle poll() and short reads.
18269 ASL Compiler, version X2026:
18271 Fixed a problem introduced in the previous label where the AML
18273 code emitted for package objects produced packages with zero
18276 ----------------------------------------
18277 Summary of changes for this label: 08_16_01
18279 ACPI CA Core Subsystem:
18281 The following ACPI 2.0 ASL operators have been implemented in the
18282 AML interpreter (These are already supported by the Intel ASL
18283 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
18284 ToBuffer. Support for 64-bit AML constants is implemented in the
18285 AML parser, debugger, and disassembler.
18287 The internal memory tracking mechanism (leak detection code) has
18288 been upgraded to reduce the memory overhead (a separate tracking
18289 block is no longer allocated for each memory allocation), and now
18290 supports all of the internal object caches.
18292 The data structures and code for the internal object caches have
18293 been coelesced and optimized so that there is a single cache and
18294 memory list data structure and a single group of functions that
18295 implement generic cache management. This has reduced the code
18296 size in both the debug and release versions of the subsystem.
18298 The DEBUG_PRINT macro(s) have been optimized for size and replaced
18299 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
18300 different, because it generates a single call to an internal
18301 function. This results in a savings of about 90 bytes per
18302 invocation, resulting in an overall code and data savings of about
18303 16% in the debug version of the subsystem.
18307 Fixed C3 disk corruption problems and re-enabled C3 on supporting
18310 Integrated low-level sleep code by Patrick Mochel.
18312 Further tweaked source code Linuxization.
18318 Support for ACPI 2.0 variable length packages is fixed/completed.
18320 Fixed a problem where the optional length parameter for the ACPI
18321 2.0 ToString operator.
18323 Fixed multiple extraneous error messages when a syntax error is
18324 detected within the declaration line of a control method.
18326 ----------------------------------------
18327 Summary of changes for this label: 07_17_01
18329 ACPI CA Core Subsystem:
18331 Added a new interface named AcpiGetFirmwareTable to obtain any
18332 ACPI table via the ACPI signature. The interface can be called at
18333 any time during kernel initialization, even before the kernel
18334 virtual memory manager is initialized and paging is enabled. This
18335 allows kernel subsystems to obtain ACPI tables very early, even
18336 before the ACPI CA subsystem is initialized.
18338 Fixed a problem where Fields defined with the AnyAcc attribute
18339 could be resolved to the incorrect address under the following
18340 conditions: 1) the field width is larger than 8 bits and 2) the
18341 parent operation region is not defined on a DWORD boundary.
18343 Fixed a problem where the interpreter is not being locked during
18344 namespace initialization (during execution of the _INI control
18345 methods), causing an error when an attempt is made to release it
18348 ACPI 2.0 support in the AML Interpreter has begun and will be
18349 ongoing throughout the rest of this year. In this label, The Mod
18350 operator is implemented.
18352 Added a new data type to contain full PCI addresses named
18353 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
18354 and Function values.
18358 Enhanced the Linux version of the source code to change most
18359 capitalized ACPI type names to lowercase. For example, all
18360 instances of ACPI_STATUS are changed to acpi_status. This will
18361 result in a large diff, but the change is strictly cosmetic and
18362 aligns the CA code closer to the Linux coding standard.
18366 The interfaces to the PCI configuration space have been changed to
18367 add the PCI Segment number and to split the single 32-bit combined
18368 DeviceFunction field into two 16-bit fields. This was
18369 accomplished by moving the four values that define an address in
18370 PCI configuration space (segment, bus, device, and function) to
18371 the new ACPI_PCI_ID structure.
18373 The changes to the PCI configuration space interfaces led to a
18374 reexamination of the complete set of address space access
18375 interfaces for PCI, I/O, and Memory. The previously existing 18
18376 interfaces have proven difficult to maintain (any small change
18377 must be propagated across at least 6 interfaces) and do not easily
18378 allow for future expansion to 64 bits if necessary. Also, on some
18379 systems, it would not be appropriate to demultiplex the access
18380 width (8, 16, 32,or 64) before calling the OSL if the
18381 corresponding native OS interfaces contain a similar access width
18382 parameter. For these reasons, the 18 address space interfaces
18383 have been replaced by these 6 new ones:
18385 AcpiOsReadPciConfiguration
18386 AcpiOsWritePciConfiguration
18392 Added a new interface named AcpiOsGetRootPointer to allow the OSL
18393 to perform the platform and/or OS-specific actions necessary to
18394 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
18395 interface will simply call down to the CA core to perform the low-
18396 memory search for the table. On IA-64, the RSDP is obtained from
18397 EFI. Migrating this interface to the OSL allows the CA core to
18399 remain OS and platform independent.
18401 Added a new interface named AcpiOsSignal to provide a generic
18402 "function code and pointer" interface for various miscellaneous
18403 signals and notifications that must be made to the host OS. The
18404 first such signals are intended to support the ASL Fatal and
18405 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
18406 interface has been obsoleted.
18408 The definition of the AcpiFormatException interface has been
18409 changed to simplify its use. The caller no longer must supply a
18410 buffer to the call; A pointer to a const string is now returned
18411 directly. This allows the call to be easily used in printf
18412 statements, etc. since the caller does not have to manage a local
18416 ASL Compiler, Version X2025:
18418 The ACPI 2.0 Switch/Case/Default operators have been implemented
18419 and are fully functional. They will work with all ACPI 1.0
18420 interpreters, since the operators are simply translated to If/Else
18423 The ACPI 2.0 ElseIf operator is implemented and will also work
18424 with 1.0 interpreters, for the same reason.
18426 Implemented support for ACPI 2.0 variable-length packages. These
18427 packages have a separate opcode, and their size is determined by
18428 the interpreter at run-time.
18430 Documentation The ACPI CA Programmer Reference has been updated to
18431 reflect the new interfaces and changes to existing interfaces.
18433 ------------------------------------------
18434 Summary of changes for this label: 06_15_01
18436 ACPI CA Core Subsystem:
18438 Fixed a problem where a DWORD-accessed field within a Buffer
18439 object would get its byte address inadvertently rounded down to
18440 the nearest DWORD. Buffers are always Byte-accessible.
18442 ASL Compiler, version X2024:
18444 Fixed a problem where the Switch() operator would either fault or
18445 hang the compiler. Note however, that the AML code for this ACPI
18446 2.0 operator is not yet implemented.
18448 Compiler uses the new AcpiOsGetTimer interface to obtain compile
18451 Implementation of the CreateField operator automatically converts
18452 a reference to a named field within a resource descriptor from a
18453 byte offset to a bit offset if required.
18455 Added some missing named fields from the resource descriptor
18456 support. These are the names that are automatically created by the
18457 compiler to reference fields within a descriptor. They are only
18458 valid at compile time and are not passed through to the AML
18461 Resource descriptor named fields are now typed as Integers and
18462 subject to compile-time typechecking when used in expressions.
18464 ------------------------------------------
18465 Summary of changes for this label: 05_18_01
18467 ACPI CA Core Subsystem:
18469 Fixed a couple of problems in the Field support code where bits
18470 from adjacent fields could be returned along with the proper field
18471 bits. Restructured the field support code to improve performance,
18472 readability and maintainability.
18474 New DEBUG_PRINTP macro automatically inserts the procedure name
18475 into the output, saving hundreds of copies of procedure name
18476 strings within the source, shrinking the memory footprint of the
18477 debug version of the core subsystem.
18479 Source Code Structure:
18481 The source code directory tree was restructured to reflect the
18482 current organization of the component architecture. Some files
18483 and directories have been moved and/or renamed.
18487 Fixed leaking kacpidpc processes.
18489 Fixed queueing event data even when /proc/acpi/event is not
18492 ASL Compiler, version X2020:
18494 Memory allocation performance enhancement - over 24X compile time
18495 improvement on large ASL files. Parse nodes and namestring
18496 buffers are now allocated from a large internal compiler buffer.
18498 The temporary .SRC file is deleted unless the "-s" option is
18501 The "-d" debug output option now sends all output to the .DBG file
18502 instead of the console.
18504 "External" second parameter is now optional
18506 "ElseIf" syntax now properly allows the predicate
18508 Last operand to "Load" now recognized as a Target operand
18510 Debug object can now be used anywhere as a normal object.
18512 ResourceTemplate now returns an object of type BUFFER
18514 EISAID now returns an object of type INTEGER
18516 "Index" now works with a STRING operand
18518 "LoadTable" now accepts optional parameters
18520 "ToString" length parameter is now optional
18522 "Interrupt (ResourceType," parse error fixed.
18524 "Register" with a user-defined region space parse error fixed
18526 Escaped backslash at the end of a string ("\\") scan/parse error
18529 "Revision" is now an object of type INTEGER.
18533 ------------------------------------------
18534 Summary of changes for this label: 05_02_01
18538 /proc/acpi/event now blocks properly.
18540 Removed /proc/sys/acpi. You can still dump your DSDT from
18543 ACPI CA Core Subsystem:
18545 Fixed a problem introduced in the previous label where some of the
18546 "small" resource descriptor types were not recognized.
18548 Improved error messages for the case where an ASL Field is outside
18549 the range of the parent operation region.
18551 ASL Compiler, version X2018:
18554 Added error detection for ASL Fields that extend beyond the length
18555 of the parent operation region (only if the length of the region
18556 is known at compile time.) This includes fields that have a
18557 minimum access width that is smaller than the parent region, and
18558 individual field units that are partially or entirely beyond the
18559 extent of the parent.
18563 ------------------------------------------
18564 Summary of changes for this label: 04_27_01
18566 ACPI CA Core Subsystem:
18568 Fixed a problem where the namespace mutex could be released at the
18569 wrong time during execution of AcpiRemoveAddressSpaceHandler.
18571 Added optional thread ID output for debug traces, to simplify
18572 debugging of multiple threads. Added context switch notification
18573 when the debug code realizes that a different thread is now
18574 executing ACPI code.
18576 Some additional external data types have been prefixed with the
18577 string "ACPI_" for consistency. This may effect existing code.
18578 The data types affected are the external callback typedefs - e.g.,
18580 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
18584 Fixed an issue with the OSL semaphore implementation where a
18585 thread was waking up with an error from receiving a SIGCHLD
18588 Linux version of ACPI CA now uses the system C library for string
18589 manipulation routines instead of a local implementation.
18591 Cleaned up comments and removed TBDs.
18593 ASL Compiler, version X2017:
18595 Enhanced error detection and reporting for all file I/O
18600 Programmer Reference updated to version 1.06.
18604 ------------------------------------------
18605 Summary of changes for this label: 04_13_01
18607 ACPI CA Core Subsystem:
18609 Restructured support for BufferFields and RegionFields.
18610 BankFields support is now fully operational. All known 32-bit
18611 limitations on field sizes have been removed. Both BufferFields
18612 and (Operation) RegionFields are now supported by the same field
18615 Resource support now supports QWORD address and IO resources. The
18616 16/32/64 bit address structures and the Extended IRQ structure
18617 have been changed to properly handle Source Resource strings.
18619 A ThreadId of -1 is now used to indicate a "mutex not acquired"
18620 condition internally and must never be returned by AcpiOsThreadId.
18621 This reserved value was changed from 0 since Unix systems allow a
18626 Driver code reorganized to enhance portability
18628 Added a kernel configuration option to control ACPI_DEBUG
18630 Fixed the EC driver to honor _GLK.
18632 ASL Compiler, version X2016:
18634 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
18635 address space was set to 0, not 0x7f as it should be.
18637 ------------------------------------------
18638 Summary of changes for this label: 03_13_01
18640 ACPI CA Core Subsystem:
18642 During ACPI initialization, the _SB_._INI method is now run if
18645 Notify handler fix - notifies are deferred until the parent method
18646 completes execution. This fixes the "mutex already acquired"
18647 issue seen occasionally.
18649 Part of the "implicit conversion" rules in ACPI 2.0 have been
18650 found to cause compatibility problems with existing ASL/AML. The
18651 convert "result-to-target-type" implementation has been removed
18652 for stores to method Args and Locals. Source operand conversion
18653 is still fully implemented. Possible changes to ACPI 2.0
18654 specification pending.
18656 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
18659 Fix for compiler warnings for 64-bit compiles.
18663 /proc output aligned for easier parsing.
18665 Release-version compile problem fixed.
18667 New kernel configuration options documented in Configure.help.
18669 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
18674 Power resource driver integrated with bus manager.
18676 Fixed kernel fault during active cooling for thermal zones.
18680 The source code tree has been restructured.
18684 ------------------------------------------
18685 Summary of changes for this label: 03_02_01
18687 Linux OS Services Layer (OSL):
18689 Major revision of all Linux-specific code.
18691 Modularized all ACPI-specific drivers.
18693 Added new thermal zone and power resource drivers.
18695 Revamped /proc interface (new functionality is under /proc/acpi).
18697 New kernel configuration options.
18699 Linux known issues:
18701 New kernel configuration options not documented in Configure.help
18705 Module dependencies not currently implemented. If used, they
18706 should be loaded in this order: busmgr, power, ec, system,
18707 processor, battery, ac_adapter, button, thermal.
18709 Modules will not load if CONFIG_MODVERSION is set.
18711 IBM 600E - entering S5 may reboot instead of shutting down.
18713 IBM 600E - Sleep button may generate "Invalid <NULL> context"
18716 Some systems may fail with "execution mutex already acquired"
18719 ACPI CA Core Subsystem:
18721 Added a new OSL Interface, AcpiOsGetThreadId. This was required
18722 for the deadlock detection code. Defined to return a non-zero, 32-
18723 bit thread ID for the currently executing thread. May be a non-
18724 zero constant integer on single-thread systems.
18726 Implemented deadlock detection for internal subsystem mutexes. We
18727 may add conditional compilation for this code (debug only) later.
18729 ASL/AML Mutex object semantics are now fully supported. This
18730 includes multiple acquires/releases by owner and support for the
18732 Mutex SyncLevel parameter.
18734 A new "Force Release" mechanism automatically frees all ASL
18735 Mutexes that have been acquired but not released when a thread
18736 exits the interpreter. This forces conformance to the ACPI spec
18737 ("All mutexes must be released when an invocation exits") and
18738 prevents deadlocked ASL threads. This mechanism can be expanded
18739 (later) to monitor other resource acquisitions if OEM ASL code
18740 continues to misbehave (which it will).
18742 Several new ACPI exception codes have been added for the Mutex
18745 Recursive method calls are now allowed and supported (the ACPI
18746 spec does in fact allow recursive method calls.) The number of
18747 recursive calls is subject to the restrictions imposed by the
18748 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
18751 Implemented support for the SyncLevel parameter for control
18752 methods (ACPI 2.0 feature)
18754 Fixed a deadlock problem when multiple threads attempted to use
18757 Fixed a problem where the string length of a String package
18758 element was not always set in a package returned from
18759 AcpiEvaluateObject.
18761 Fixed a problem where the length of a String package element was
18762 not always included in the length of the overall package returned
18763 from AcpiEvaluateObject.
18765 Added external interfaces (Acpi*) to the ACPI debug memory
18766 manager. This manager keeps a list of all outstanding
18767 allocations, and can therefore detect memory leaks and attempts to
18768 free memory blocks more than once. Useful for code such as the
18769 power manager, etc. May not be appropriate for device drivers.
18770 Performance with the debug code enabled is slow.
18772 The ACPI Global Lock is now an optional hardware element.
18774 ASL Compiler Version X2015:
18776 Integrated changes to allow the compiler to be generated on
18777 multiple platforms.
18779 Linux makefile added to generate the compiler on Linux
18783 All platform-specific headers have been moved to their own
18784 subdirectory, Include/Platform.
18786 New source file added, Interpreter/ammutex.c
18788 New header file, Include/acstruct.h
18792 The programmer reference has been updated for the following new
18793 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
18795 ------------------------------------------
18796 Summary of changes for this label: 02_08_01
18798 Core ACPI CA Subsystem: Fixed a problem where an error was
18799 incorrectly returned if the return resource buffer was larger than
18800 the actual data (in the resource interfaces).
18802 References to named objects within packages are resolved to the
18804 full pathname string before packages are returned directly (via
18805 the AcpiEvaluateObject interface) or indirectly via the resource
18808 Linux OS Services Layer (OSL):
18810 Improved /proc battery interface.
18813 Added C-state debugging output and other miscellaneous fixes.
18815 ASL Compiler Version X2014:
18817 All defined method arguments can now be used as local variables,
18818 including the ones that are not actually passed in as parameters.
18819 The compiler tracks initialization of the arguments and issues an
18820 exception if they are used without prior assignment (just like
18823 The -o option now specifies a filename prefix that is used for all
18824 output files, including the AML output file. Otherwise, the
18825 default behavior is as follows: 1) the AML goes to the file
18826 specified in the DSDT. 2) all other output files use the input
18827 source filename as the base.
18829 ------------------------------------------
18830 Summary of changes for this label: 01_25_01
18832 Core ACPI CA Subsystem: Restructured the implementation of object
18833 store support within the interpreter. This includes support for
18834 the Store operator as well as any ASL operators that include a
18837 Partially implemented support for Implicit Result-to-Target
18838 conversion. This is when a result object is converted on the fly
18839 to the type of an existing target object. Completion of this
18840 support is pending further analysis of the ACPI specification
18841 concerning this matter.
18843 CPU-specific code has been removed from the subsystem (hardware
18846 New Power Management Timer functions added
18848 Linux OS Services Layer (OSL): Moved system state transition code
18849 to the core, fixed it, and modified Linux OSL accordingly.
18851 Fixed C2 and C3 latency calculations.
18854 We no longer use the compilation date for the version message on
18855 initialization, but retrieve the version from AcpiGetSystemInfo().
18857 Incorporated for fix Sony VAIO machines.
18859 Documentation: The Programmer Reference has been updated and
18863 ASL Compiler: Version X2013: Fixed a problem where the line
18864 numbering and error reporting could get out of sync in the
18865 presence of multiple include files.
18867 ------------------------------------------
18868 Summary of changes for this label: 01_15_01
18870 Core ACPI CA Subsystem:
18872 Implemented support for type conversions in the execution of the
18873 ASL Concatenate operator (The second operand is converted to
18874 match the type of the first operand before concatenation.)
18876 Support for implicit source operand conversion is partially
18877 implemented. The ASL source operand types Integer, Buffer, and
18878 String are freely interchangeable for most ASL operators and are
18879 converted by the interpreter on the fly as required. Implicit
18880 Target operand conversion (where the result is converted to the
18881 target type before storing) is not yet implemented.
18883 Support for 32-bit and 64-bit BCD integers is implemented.
18885 Problem fixed where a field read on an aligned field could cause a
18886 read past the end of the field.
18888 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
18889 does not return a value, but the caller expects one. (The ASL
18890 compiler flags this as a warning.)
18895 1. Static typechecking of all operands is implemented. This
18896 prevents the use of invalid objects (such as using a Package where
18897 an Integer is required) at compile time instead of at interpreter
18899 2. The ASL source line is printed with ALL errors and warnings.
18900 3. Bug fix for source EOF without final linefeed.
18901 4. Debug option is split into a parse trace and a namespace trace.
18902 5. Namespace output option (-n) includes initial values for
18903 integers and strings.
18904 6. Parse-only option added for quick syntax checking.
18905 7. Compiler checks for duplicate ACPI name declarations
18908 1. Relaxed typechecking to allow interchangeability between
18909 strings, integers, and buffers. These types are now converted by
18910 the interpreter at runtime.
18911 2. Compiler reports time taken by each internal subsystem in the
18915 ------------------------------------------
18916 Summary of changes for this label: 12_14_00
18920 This is the first official release of the compiler. Since the
18921 compiler requires elements of the Core Subsystem, this label
18922 synchronizes everything.
18924 ------------------------------------------
18925 Summary of changes for this label: 12_08_00
18928 Fixed a problem where named references within the ASL definition
18929 of both OperationRegions and CreateXXXFields did not work
18930 properly. The symptom was an AE_AML_OPERAND_TYPE during
18931 initialization of the region/field. This is similar (but not
18932 related internally) to the problem that was fixed in the last
18935 Implemented both 32-bit and 64-bit support for the BCD ASL
18936 functions ToBCD and FromBCD.
18938 Updated all legal headers to include "2000" in the copyright
18941 ------------------------------------------
18942 Summary of changes for this label: 12_01_00
18944 Fixed a problem where method invocations within the ASL definition
18945 of both OperationRegions and CreateXXXFields did not work
18946 properly. The symptom was an AE_AML_OPERAND_TYPE during
18947 initialization of the region/field:
18949 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
18950 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
18953 Fixed a problem where operators with more than one nested
18954 subexpression would fail. The symptoms were varied, by mostly
18955 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
18956 problem that has gone unnoticed until now.
18958 Subtract (Add (1,2), Multiply (3,4))
18960 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
18961 previous build (The prefix part of a relative path was handled
18964 Fixed a problem where Operation Region initialization failed if
18965 the operation region name was a "namepath" instead of a simple
18966 "nameseg". Symptom was an AE_NO_OPERAND error.
18968 Fixed a problem where an assignment to a local variable via the
18969 indirect RefOf mechanism only worked for the first such
18970 assignment. Subsequent assignments were ignored.
18972 ------------------------------------------
18973 Summary of changes for this label: 11_15_00
18975 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
18976 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
18977 the AML interpreter does NOT have support for the new 2.0 ASL
18978 grammar terms at this time.
18980 All ACPI hardware access is via the GAS structures in the ACPI 2.0
18983 All physical memory addresses across all platforms are now 64 bits
18984 wide. Logical address width remains dependent on the platform
18987 AcpiOsMapMemory interface changed to a 64-bit physical address.
18989 The AML interpreter integer size is now 64 bits, as per the ACPI
18992 For backwards compatibility with ACPI 1.0, ACPI tables with a
18993 revision number less than 2 use 32-bit integers only.
18995 Fixed a problem where the evaluation of OpRegion operands did not
18996 always resolve them to numbers properly.
18998 ------------------------------------------
18999 Summary of changes for this label: 10_20_00
19001 Fix for CBN_._STA issue. This fix will allow correct access to
19002 CBN_ OpRegions when the _STA returns 0x8.
19004 Support to convert ACPI constants (Ones, Zeros, One) to actual
19005 values before a package object is returned
19007 Fix for method call as predicate to if/while construct causing
19008 incorrect if/while behavior
19010 Fix for Else block package lengths sometimes calculated wrong (if
19013 Fix for Processor object length field, was always zero
19015 Table load abort if FACP sanity check fails
19017 Fix for problem with Scope(name) if name already exists
19019 Warning emitted if a named object referenced cannot be found
19020 (resolved) during method execution.
19026 ------------------------------------------
19027 Summary of changes for this label: 9_29_00
19029 New table initialization interfaces: AcpiInitializeSubsystem no
19030 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
19031 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
19032 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
19035 Note: These interface changes require changes to all existing OSDs
19037 The PCI_Config default address space handler is always installed
19038 at the root namespace object.
19040 -------------------------------------------
19041 Summary of changes for this label: 09_15_00
19043 The new initialization architecture is implemented. New
19044 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
19045 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
19047 (Namespace is automatically loaded when a table is loaded)
19049 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
19050 52 bytes to 32 bytes. There is usually one of these for every
19051 namespace object, so the memory savings is significant.
19053 Implemented just-in-time evaluation of the CreateField operators.
19055 Bug fixes for IA-64 support have been integrated.
19057 Additional code review comments have been implemented
19059 The so-called "third pass parse" has been replaced by a final walk
19060 through the namespace to initialize all operation regions (address
19061 spaces) and fields that have not yet been initialized during the
19062 execution of the various _INI and REG methods.
19064 New file - namespace/nsinit.c
19066 -------------------------------------------
19067 Summary of changes for this label: 09_01_00
19069 Namespace manager data structures have been reworked to change the
19070 primary object from a table to a single object. This has
19071 resulted in dynamic memory savings of 3X within the namespace and
19072 2X overall in the ACPI CA subsystem.
19074 Fixed problem where the call to AcpiEvFindPciRootBuses was
19075 inadvertently left commented out.
19077 Reduced the warning count when generating the source with the GCC
19080 Revision numbers added to each module header showing the
19081 SourceSafe version of the file. Please refer to this version
19082 number when giving us feedback or comments on individual modules.
19084 The main object types within the subsystem have been renamed to
19085 clarify their purpose:
19087 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
19088 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
19089 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
19091 NOTE: no changes to the initialization sequence are included in
19094 -------------------------------------------
19095 Summary of changes for this label: 08_23_00
19097 Fixed problem where TerminateControlMethod was being called
19098 multiple times per method
19100 Fixed debugger problem where single stepping caused a semaphore to
19103 Improved performance through additional parse object caching -
19104 added ACPI_EXTENDED_OP type
19106 -------------------------------------------
19107 Summary of changes for this label: 08_10_00
19109 Parser/Interpreter integration: Eliminated the creation of
19110 complete parse trees for ACPI tables and control methods.
19111 Instead, parse subtrees are created and then deleted as soon as
19112 they are processed (Either entered into the namespace or executed
19113 by the interpreter). This reduces the use of dynamic kernel
19114 memory significantly. (about 10X)
19116 Exception codes broken into classes and renumbered. Be sure to
19117 recompile all code that includes acexcep.h. Hopefully we won't
19118 have to renumber the codes again now that they are split into
19119 classes (environment, programmer, AML code, ACPI table, and
19122 Fixed some additional alignment issues in the Resource Manager
19125 Implemented semaphore tracking in the AcpiExec utility, and fixed
19126 several places where mutexes/semaphores were being unlocked
19127 without a corresponding lock operation. There are no known
19128 semaphore or mutex "leaks" at this time.
19130 Fixed the case where an ASL Return operator is used to return an
19133 -------------------------------------------
19134 Summary of changes for this label: 07_28_00
19136 Fixed a problem with the way addresses were calculated in
19137 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
19138 manifested itself when a Field was created with WordAccess or
19139 DwordAccess, but the field unit defined within the Field was less
19141 than a Word or Dword.
19143 Fixed a problem in AmlDumpOperands() module's loop to pull
19144 operands off of the operand stack to display information. The
19145 problem manifested itself as a TLB error on 64-bit systems when
19146 accessing an operand stack with two or more operands.
19148 Fixed a problem with the PCI configuration space handlers where
19149 context was getting confused between accesses. This required a
19150 change to the generic address space handler and address space
19151 setup definitions. Handlers now get both a global handler context
19152 (this is the one passed in by the user when executing
19153 AcpiInstallAddressSpaceHandler() and a specific region context
19154 that is unique to each region (For example, the _ADR, _SEG and
19155 _BBN values associated with a specific region). The generic
19156 function definitions have changed to the following:
19158 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
19159 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
19160 *HandlerContext, // This used to be void *Context void
19161 *RegionContext); // This is an additional parameter
19163 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
19164 RegionHandle, UINT32 Function, void *HandlerContext, void
19165 **RegionContext); // This used to be **ReturnContext
19167 -------------------------------------------
19168 Summary of changes for this label: 07_21_00
19170 Major file consolidation and rename. All files within the
19171 interpreter have been renamed as well as most header files. This
19172 was done to prevent collisions with existing files in the host
19173 OSs -- filenames such as "config.h" and "global.h" seem to be
19174 quite common. The VC project files have been updated. All
19175 makefiles will require modification.
19177 The parser/interpreter integration continues in Phase 5 with the
19178 implementation of a complete 2-pass parse (the AML is parsed
19179 twice) for each table; This avoids the construction of a huge
19180 parse tree and therefore reduces the amount of dynamic memory
19181 required by the subsystem. Greater use of the parse object cache
19182 means that performance is unaffected.
19184 Many comments from the two code reviews have been rolled in.
19186 The 64-bit alignment support is complete.
19188 -------------------------------------------
19189 Summary of changes for this label: 06_30_00
19191 With a nod and a tip of the hat to the technology of yesteryear,
19192 we've added support in the source code for 80 column output
19193 devices. The code is now mostly constrained to 80 columns or
19194 less to support environments and editors that 1) cannot display
19195 or print more than 80 characters on a single line, and 2) cannot
19196 disable line wrapping.
19198 A major restructuring of the namespace data structure has been
19199 completed. The result is 1) cleaner and more
19200 understandable/maintainable code, and 2) a significant reduction
19201 in the dynamic memory requirement for each named ACPI object
19204 -------------------------------------------
19205 Summary of changes for this label: 06_23_00
19207 Linux support has been added. In order to obtain approval to get
19208 the ACPI CA subsystem into the Linux kernel, we've had to make
19209 quite a few changes to the base subsystem that will affect all
19210 users (all the changes are generic and OS- independent). The
19211 effects of these global changes have been somewhat far reaching.
19212 Files have been merged and/or renamed and interfaces have been
19213 renamed. The major changes are described below.
19215 Osd* interfaces renamed to AcpiOs* to eliminate namespace
19216 pollution/confusion within our target kernels. All OSD
19217 interfaces must be modified to match the new naming convention.
19219 Files merged across the subsystem. A number of the smaller source
19220 and header files have been merged to reduce the file count and
19221 increase the density of the existing files. There are too many
19222 to list here. In general, makefiles that call out individual
19223 files will require rebuilding.
19225 Interpreter files renamed. All interpreter files now have the
19226 prefix am* instead of ie* and is*.
19228 Header files renamed: The acapi.h file is now acpixf.h. The
19229 acpiosd.h file is now acpiosxf.h. We are removing references to
19230 the acronym "API" since it is somewhat windowsy. The new name is
19231 "external interface" or xface or xf in the filenames.j
19234 All manifest constants have been forced to upper case (some were
19235 mixed case.) Also, the string "ACPI_" has been prepended to many
19236 (not all) of the constants, typedefs, and structs.
19238 The globals "DebugLevel" and "DebugLayer" have been renamed
19239 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
19241 All other globals within the subsystem are now prefixed with
19242 "AcpiGbl_" Internal procedures within the subsystem are now
19243 prefixed with "Acpi" (with only a few exceptions). The original
19244 two-letter abbreviation for the subcomponent remains after "Acpi"
19245 - for example, CmCallocate became AcpiCmCallocate.
19247 Added a source code translation/conversion utility. Used to
19248 generate the Linux source code, it can be modified to generate
19249 other types of source as well. Can also be used to cleanup
19250 existing source by removing extraneous spaces and blank lines.
19251 Found in tools/acpisrc/*
19253 OsdUnMapMemory was renamed to OsdUnmapMemory and then
19254 AcpiOsUnmapMemory. (UnMap became Unmap).
19256 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
19257 When set to one, this indicates that the caller wants to use the
19259 semaphore as a mutex, not a counting semaphore. ACPI CA uses
19260 both types. However, implementers of this call may want to use
19261 different OS primitives depending on the type of semaphore
19262 requested. For example, some operating systems provide separate
19264 "mutex" and "semaphore" interfaces - where the mutex interface is
19265 much faster because it doesn't have all the overhead of a full
19266 semaphore implementation.
19268 Fixed a deadlock problem where a method that accesses the PCI
19269 address space can block forever if it is the first access to the
19272 -------------------------------------------
19273 Summary of changes for this label: 06_02_00
19275 Support for environments that cannot handle unaligned data
19276 accesses (e.g. firmware and OS environments devoid of alignment
19277 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
19278 been added (via configurable macros) in these three areas: -
19279 Transfer of data from the raw AML byte stream is done via byte
19280 moves instead of word/dword/qword moves. - External objects are
19281 aligned within the user buffer, including package elements (sub-
19282 objects). - Conversion of name strings to UINT32 Acpi Names is now
19285 The Store operator was modified to mimic Microsoft's
19286 implementation when storing to a Buffer Field.
19288 Added a check of the BM_STS bit before entering C3.
19290 The methods subdirectory has been obsoleted and removed. A new
19291 file, cmeval.c subsumes the functionality.
19293 A 16-bit (DOS) version of AcpiExec has been developed. The
19294 makefile is under the acpiexec directory.