1 ----------------------------------------
4 25 September 2020. Summary of changes for version 20200925:
6 This release is available at https://acpica.org/downloads
9 1) ACPICA kernel-resident subsystem:
11 Preserve memory opregion mappings. The ACPICA's strategy with respect to
12 the handling of memory mappings associated with memory operation regions
13 is to avoid mapping the entire region at once which may be problematic at
14 least in principle (for example, it may lead to conflicts with
15 overlapping mappings having different attributes created by drivers). It
16 may also be wasteful, because memory opregions on some systems take up
17 vastchunks of address space while the fields in those regions actually
18 accessed by AML are sparsely distributed.
20 For this reason, a one-page "window" is mapped for a given opregion on
21 the first memory access through it and if that "window" does not cover an
22 address range accessed through that opregion subsequently, it is unmapped
23 and a new "window" is mapped to replace it. Next, if the new "window" is
24 not sufficient to access memory through the opregion in question in the
25 future, it will be replaced with yet another "window" and so on. That
26 may lead to a suboptimal sequence of memory mapping and unmapping
27 operations, for example if two fields in one opregion separated from each
28 other by a sufficiently wide chunk of unused address space are accessed
29 in an alternating pattern.
31 Added support for 64 bit risc-v compilation. Useful for acpica tools and
32 incorporating ACPICA into the Firmware Test Suite. Colin Ian King
33 <colin.king@canonical.com>.
35 Added support for SMBus predefined names (from SMBus Control Method
36 Interface Specification, Version 1.0, December 10, 1999. New predefined
44 AML Disassembler: Added a new command, "All <NameSeg". This command will
45 evaluate all objects in the current namespace whose NameString contains
46 the input NameSeg as the last element of the NameString. Useful for
50 2) iASL Compiler/Disassembler and ACPICA tools:
52 iASL: fixed a crash that occurred when predefined objects return packages
53 with lengths that exceed the initializer list.
55 iASL: added more detail to external resolution error message when
56 compiling multiple definition blocks.
58 iASL: improve alias analysis by saving object type. If the alias is a
59 method type, the parameter count is also recorded.
61 AcpiExec: Increase the default loop timeout value. Was 1 second, is now
62 10 seconds. Prevents unnecessary timeouts when executing control methods
63 from the command line.
65 AcpiHelp/disassembler: Added a bunch of "known" UUIDs to the internal
68 Generic Buttons Device
70 Control Method Battery
71 Device Graphs for _DSD method
72 Hierarchical Data Extension
73 ....ARM CoreSight Graph
75 ----------------------------------------
78 17 July 2020. Summary of changes for version 20200717:
80 This release is available at https://acpica.org/downloads
83 1) ACPICA kernel-resident subsystem:
85 Do not increment OperationRegion reference counts for field units. Recent
86 server firmware has revealed that this reference count can overflow on
87 large servers that declare many field units (thousands) under the same
88 OperationRegion. This occurs because each field unit declaration will add
89 a reference count to the source OperationRegion. This release solves the
90 reference count overflow for OperationRegion objects by preventing
91 fieldUnits from incrementing their parent OperationRegion's reference
94 Replaced one-element arrays with flexible-arrays, which were introduced
97 Restored the readme file containing the directions for generation of
98 ACPICA from source on MSVC 2017. Updated the file for MSVC 2017. File is
99 located at: generate/msvc2017/readme.txt
101 2) iASL Compiler/Disassembler and ACPICA tools:
103 iASL: Fixed a regression found in version 20200214. Prevent iASL from
104 emitting an extra byte of garbage data when control methods declared a
105 single parameter type without using braces. This extra byte is known to
106 cause a blue screen on the Windows AML interpreter.
108 iASL: Made a change to allow external declarations to specify the type of
109 a named object even when some name segments are not defined.
110 This change allows the following ASL code to compile (When DEV0 is not
111 defined or not defined yet):
113 External (\_SB.DEV0.OBJ1, IntObj)
114 External (\_SB.DEV0, DeviceObj)
116 iASL: Fixed a problem where method names in "Alias ()" statement could be
117 misinterpreted. They are now interpreted correctly as method invocations.
119 iASL: capture a method parameter count (Within the Method info segment,
120 as well as the argument node) when using parameter type lists.
122 ----------------------------------------
125 28 May 2020. Summary of changes for version 20200528:
128 1) ACPICA kernel-resident subsystem:
130 Removed old/obsolete Visual Studio files which were used to build the
131 Windows versions of the ACPICA tools. Since we have moved to Visual
132 Studio 2017, we are no longer supporting Visual Studio 2006 and 2009
133 project files. The new subdirectory and solution file are located at:
135 acpica/generate/msvc2017/AcpiComponents.sln
138 2) iASL Compiler/Disassembler and ACPICA tools:
140 iASL: added support for a new OperationRegion Address Space (subtype):
141 PlatformRtMechanism. Support for this new keyword is being released for
142 early prototyping. It will appear in the next release of the ACPI
145 iASL: do not optimize the NameString parameter of the CondRefOf operator.
146 In the previous iASL compiler release, the NameString parameter of the
147 CondRefOf was optimized. There is evidence that some implementations of
148 the AML interpreter do not perform the recursive search-to-parent search
149 during the execution of the CondRefOf operator. Therefore, the CondRefOf
150 operator behaves differently when the NameString parameter is a single
151 name segment (a NameSeg) as opposed to a full NamePath (starting at the
152 root scope) or a NameString containing parent prefixes.
154 iASL: Prevent an inadvertent remark message. This change prevents a
155 remark if within a control method the following exist:
156 1) An Operation Region is defined, and
157 2) A Field operator is defined that refers to the region.
158 This happens because at the top level, the Field operator does not
159 actually create a new named object, it simply references the operation
162 Removed support for the acpinames utility. The acpinames was a simple
163 utility used to populate and display the ACPI namespace without executing
164 any AML code. However, ACPICA now supports executable opcodes outside of
165 control methods. This means that executable AML opcodes such as If and
166 Store opcodes need to be executed during table load. Therefore, acpinames
167 would need to be updated to match the same behavior as the acpiexec
168 utility and since acpiexec can already dump the entire namespace (via the
169 'namespace' command), we no longer have the need to maintain acpinames.
171 In order to dump the contents of the ACPI namespace using acpiexec,
172 execute the following command from the command line:
174 acpiexec -b "n" [aml files]
176 ----------------------------------------
179 30 April 2020. Summary of changes for version 20200430:
181 1) ACPICA kernel-resident subsystem:
183 Cleaned up the coding style of a couple of global variables
184 (AcpiGbl_NextCmdNum and AcpiProtocolLengths) caught by static analyzers.
185 AcpiProtocolLengths was made static, and the definition of
186 AcpiGbl_NextCmdNum was moved to acglobal.h.
189 2) iASL Compiler/Disassembler and ACPICA tools:
191 iASL DataTable Compiler: Fixed a segfault on errors that aren't directly
192 associated with a field.
194 Disassembler: has been made more resilient so that it will continue to
195 parse AML even if the AML generates ACPI namespace errors. This enables
196 iASL to disassemble some AML that may have been compiled using older
197 versions of iASL that no longer compile with newer versions of iASL.
199 iASL: Fixed the required parameters for _NIH and _NIG. Previously, there
200 was a mixup where _NIG required one parameter and _NIH required zero
201 parameters. This change swaps these parameter requirements. Now it is
202 required that _NIH must be called with one parameter and _NIG requires
205 iASL: Allow use of undefined externals as long as they are protected by
206 an if (CondRefOf (...)) block when compiling multiple definition blocks.
208 iASL: Fixed the type override behavior of named objects that are declared
209 as External. External declarations will no longer override the type of
210 the actual definition if it already exists.
212 AcpiNames: Added setargv.obj to the MSVC 2017 link sequence to enable
213 command line wildcard support on Windows. Note: the AcpiNames utility is
214 essentially redundant with the AcpiExec utility (using the "namespace"
215 command) and is therefore deprecated. It will be removed in future
218 Disassembler: ignore AE_ALREADY_EXISTS status when parsing create*
219 operators. The disassembler is intended to emit existing ASL code as-is.
220 Therefore, error messages emitted during disassembly should be ignored or
221 handled in a way such that the disassembler can continue to parse the
222 AML. This change ignores AE_ALREADY_EXISTS errors during the deferred Op
223 parsing for create operators in order to complete parsing ASL termlists.
225 iASL DataTable Compiler: IVRS table: fix potentially uninitialized
226 variable warning. Some compilers catch potential uninitialized variables.
227 This is done by examining branches of if/else statements. This change
228 replaces an "else if" with an "else" to fix the uninitialized variable
232 ----------------------------------------
233 26 March 2020. Summary of changes for version 20200326:
236 1) ACPICA kernel-resident subsystem:
238 Performed a code clean-up to prevent build errors on early versions of
241 Added the NHLT table signature. iASL data table compiler/disassembler
242 support for this table is coming soon.
245 2) iASL Compiler/Disassembler and ACPICA tools:
247 AcpiExec: Fixed several problems with the namespace initialization file
248 (-fi<filename> option). Includes fixes to prevent AE_ALREADY_EXISTS
249 errors, several seg faults, and enhancements to line parsing within the
250 init file. In addition, each object found in the init file and it's new
251 value is displayed, as well as any such entries that do not have a
252 corresponding name in the namespace. For reference, the syntax for the
253 various supported data types are presented below:
254 PCHG 0x777788889999BBBB // Integer
255 \DEV1.STR1 "XYZ" // String
256 BUF1 (88 99 AA) // Buffer
257 PKG1 [0x1111 0x2222] // Package
258 \BF1 0x7980 // BufferField
259 RCRV 0x0123456789ABCDEF // Field Unit
261 iASL: Added a custom iASL macro __EXPECT__(iASL-Error-Code). This macro
262 can be used anywhere in a given ASL file to configure iASL to expect an
263 iASL compiler error code on the line where this macro was placed. If the
264 error code does not exist, an error is generated. This is intended to be
265 used for ACPICA's ASL test suite, but can be used by ASL developers as
268 iASL: table compiler: Implemented IVRS IVHD type 11h parsing. The AMD
269 IVRS table parsing supported only IVHD type 10h structures. Parsing an
270 IVHD type 11h caused the iasl to report unknown subtable type. Add
271 necessary structure definition for IVHD type 11h and apply correct
272 parsing method based on subtable type. Micha? ?ygowski.
274 iASL: table compiler: Fixed IVRS table IVHD type 10h reserved field name
275 According to AMD IOMMU Specification Revision 3.05 the reserved field
276 should be IOMMU Feature Reporting. Change the name of the field to the
277 correct one. Micha? ?ygowski.
279 acpiexec: removed redeclaration of AcpiGbl_DbOpt_NoRegionSupport. Patch
280 based on suggestions by David Seifert and Benjamin Berg.
282 iASL: table compiler: removed an unused variable (DtCompilerParserResult)
283 causing linking errors. Patch based on suggestions by David Seifert and
286 iASL: table compiler: make LexBuffer static to avoid linking errors in
287 newer compilers. Patch based on suggestions by David Seifert and Benjamin
290 iASL: fixed type matching between External and Named objects. External
291 object types can only be expressed with ACPI object type values that are
292 defined in the ACPI spec. However, iASL uses ACPI object type values that
293 are local to ACPICA in addition to the values defined in the ACPI spec.
294 This change implements type matching to map some object type values
295 specific to ACPICA to ones that are defined in the ACPI spec.
297 iASL: Dropped the type mismatch compiler error that can arise from
298 External declarations to a warning. This warning can occur when there is
299 a type difference between the external declaration and the actual object
300 declaration (when compiling multiple files/modules simultaneously).
302 iASL: removed an incorrect error message regarding externals. This change
303 removes an incorrect error that is emitted when a duplicate external
304 declaration does not contain a type that opens a scope. This is incorrect
305 because the duplicate external with conflicting types are already caught
306 by iASL and it doesn't make any sense to enforce what this conflicting
309 AcpiXtract: fix AX_IS_TABLE_BLOCK_HEADER macro. This macro needs to be
310 surrounded by parens. Otherwise, a logical statement that applies a
311 logical not operator to this macro could result in a computation that
312 applies the operator to the left side of the logical and but not the
313 right. Reported-by: John Levon <john.levon@joyent.com>
315 Fixed a problem with the local version of sprint(): On 32-bit, the
316 provided sprintf() is non-functional: with a size of ACPI_UINT32_MAX,
317 String + Size will wrap, meaning End < Start, and
318 AcpiUtBoundStringOutput() will never output anything as a result. The
319 symptom seen of this was acpixtract failing to output anything -- with a
320 custom build that included utprint.c. Signed-off-by: John Levon
321 <john.levon@joyent.com>
323 iASL: Changed the "PlatformCommChannel" ASL keyword to "PCC", as per the
327 ----------------------------------------
328 14 February 2020. Summary of changes for version 20200214:
331 1) ACPICA kernel-resident subsystem:
333 Enable sleep button on ACPI legacy wake: Hibernation (S4) is triggered
334 in a guest when it receives a sleep trigger from the hypervisor. When the
335 guest resumes from this power state, it does not see the SleepEnabled
336 bit. In other words, the sleepHibernation (S4) is triggered in a guest
337 when it receives a sleep trigger from the hypervisor. When the guest
338 resumes from this power state, it does not see the SleepEnabled bit. In
339 other words, the sleep button is not enabled on waking from an S4 state.
340 This causes subsequent invocation of sleep state to fail since the
341 guest.button is not enabled on waking from an S4 state. This causes
342 subsequent invocation of sleep state to fail in the guest. Fix this
343 problem by enabling the sleep button in ACPI legacy wake. From Anchal
344 Agarwal <anchalag@amazon.com>.
346 Implemented a new external interface, AcpiAnyGpeStatusSet (). To be used
347 for checking the status bits of all enabled GPEs in one go. It is needed
348 to distinguish spurious SCIs from genuine ones when deciding whether or
349 not to wake up the system from suspend-to-idle.
351 Generic Makefiles: replace HOST name with ACPI_HOST: Some machines may be
352 using HOST in their environment to represent the host name for their
353 machines. Avoid this problem by renaming this variable from HOST to
356 MSVC 2017 project files: Enable multiprocessor generation to improve
359 Added a macro to get the byte width of a Generic Address structure. New
360 ACPI_ACCESS_BYTE_WIDTH is in addition to the existing
361 ACPI_ACCESS_BIT_WIDTH. From Mika Westerberg.
364 2) iASL Compiler/Disassembler and ACPICA tools:
366 iASL: Implemented full support for the (optional, rarely used) ReturnType
367 and ParameterTypesList for the Method, Function, and External operators.
368 For Method declarations, the number of individual ParameterTypes must
369 match the declaration of the number of arguments (NumArgs). This also
370 Fixes a problem with the External operator where extra/extraneous bytes
371 were emitted in the AML code if the optional ReturnType/ParameterTypes
372 were specified for a MethodObj declaration.
374 1) Method NumArgs count does not match length of ParameterTypes list
376 iASL: Implemented detection of type mismatches between External
377 declarations and named object declarations. Also, detect type mismatches
378 between multiple External declarations of the same Name.
380 1) Type mismatch between external declaration and actual object
382 2) Type mismatch between multiple external declarations detected
384 iASL: Implemented new error messages for External operators that specify
385 a ReturnType and/or ParameterTypesList for any object type other than
386 control methods (MethodObj).
388 1) Return type is only allowed for Externals declared as MethodObj
389 2) Parameter type is only allowed for Externals declared as MethodObj
391 iASL: Implemented two new remark/warning messages for ASL code that
392 creates named objects from within a control method. This is very
393 inefficient since the named object must be created and deleted each time
394 the method is executed.
396 1) Creation of named objects within a method is highly inefficient, use
397 globals or method local variables instead (remark)
398 2) Static OperationRegion should be declared outside control method
401 iASL: Improved illegal forward reference detection by adding support to
402 detect forward-reference method invocations.
404 iASL: Detect and issue an error message for NameStrings that contain too
405 many individual NameSegs (>255). This is an AML limitation that is
406 defined in the ACPI specification.
408 1) NameString contains too many NameSegs (>255)
410 acpidump: windows: use GetSystemFirmwareTable API for all tables except
411 SSDT. By using this API, acpidump is able to get all tables in the XSDT
413 iASL: Removed unused parser file and updated msvc2017 project files.
414 Removed the obsolete AslCompiler.y from the repository.
416 iASL: msvc2017: Fixed macros in the file dependency list to prevent
417 unnecessary rebuilds. Replace %(Directory) with %(RelativeDir).
419 Disassembler: Prevent spilling error messages to the output file. All
420 errors are directed to the console instead. These error messages
421 prevented re-compilation of the resulting disassembled ASL output file
425 ----------------------------------------
426 10 January 2020. Summary of changes for version 20200110:
429 1) ACPICA kernel-resident subsystem:
431 Updated all copyrights to 2020. This affects all ACPICA source code
435 2) iASL Compiler/Disassembler and ACPICA tools:
437 ASL test suite (ASLTS): Updated all copyrights to 2020.
439 Tools and utilities: Updated all signon copyrights to 2020.
441 iASL: fix forward reference analysis for field declarations. Fixes
442 forward reference analysis for field declarations by searching the
443 parent scope for the named object when the object is not present in
446 iASL: Improved the error output for ALREADY_EXISTS errors. Now, the
447 full pathname of the name that already exists is printed.
449 iASL: Enhance duplicate Case() detection for buffers. Add check for
450 buffers with no initializer list (these buffers will be filled with
454 ----------------------------------------
455 13 December 2019. Summary of changes for version 20191213:
458 1) ACPICA kernel-resident subsystem:
460 Return a Buffer object for all fields created via the CreateField
461 operator. Previously, an Integer would be returned if the size of
462 the field was less than or equal to the current size of an Integer.
463 Although this goes against the ACPI specification, it provides
464 compatibility with other ACPI implementations. Also updated the
465 ASLTS test suite to reflect this new behavior.
467 2) iASL Compiler/Disassembler and ACPICA tools:
469 iASL: Implemented detection of (and throw an error for) duplicate
470 values for Case statements within a single Switch statement. Duplicate
471 Integers, Strings, and Buffers are supported.
473 iASL: Fix error logging issue during multiple file compilation --
474 Switch to the correct input file during error node creation.
476 iASL: For duplicate named object creation, now emit an error instead
477 of a warning - since this will cause a runtime error.
479 AcpiSrc: Add unix line-ending support for non-Windows builds.
481 iASL: Add an error condition for an attempt to create a NameString
482 with > 255 NameSegs (the max allowable via the AML definition).
485 ----------------------------------------
486 18 October 2019. Summary of changes for version 20191018:
489 1) ACPICA kernel-resident subsystem:
491 Debugger: added a new command: ?Fields [address space ID]?. This command
492 dumps the contents of all field units that are defined within the
493 namespace with a particular address space ID.
495 Modified the external interface AcpiLoadTable() to return a table index.
496 This table index can be used for unloading a table for debugging.
499 ACPI_TABLE_HEADER *Table,
502 Implemented a new external interface: AcpiUnloadTable() This new function
503 takes a table index as an argument and unloads the table. Useful for
509 Ported the AcpiNames utility to use the new table initialization
510 sequence. The utility was broken before this change. Also, it was
511 required to include most of the AML interpreter into the utility in order
512 to process table initialization (module-level code execution.)
514 Update for results from running Clang V8.0.1. This fixes all "dead
515 assignment" warnings. There are still several "Dereference of NULL
516 pointer" warnings, but these have been found to be false positive
520 2) iASL Compiler/Disassembler and ACPICA tools:
522 iASL: numerous table compiler changes to ensure that the usage of
523 yacc/bison syntax is POSIX-compliant.
525 iASL/disassembler: several simple bug fixes in the data table
528 Acpiexec: expanded the initialization file (the -fi option) to initialize
529 strings, buffers, packages, and field units.
532 ----------------------------------------
533 16 August 2019. Summary of changes for version 20190816:
535 This release is available at https://acpica.org/downloads
538 1) ACPICA kernel-resident subsystem:
540 Modified the OwnerId mechanism to allow for more Owner Ids. The previous
541 limit was 256 Ids, now it is 4096 Ids. This prevents OWNER_ID_LIMIT
542 exceptions on machines with a large number of initialization threads,
543 many CPU cores and nested initialization control methods.
545 Introduced acpi_dispatch_gpe() as a wrapper around AcpiEvDetectGpe() for
546 checking if the given GPE (as represented by a GPE device handle and a
547 GPE number) is currently active and dispatching it (if that's the case)
548 outside of interrupt context.
550 Table load: exit the interpreter before initializing objects within the
551 new table This prevents re-acquiring the interpreter lock when loading
554 Added the "Windows 2019" string to the _OSI support (version 1903). Jung-
557 Macros: removed pointer math on a null pointer. Causes warnings on some
558 compilers and/or tools. Changed ACPI_TO_POINTER to use ACPI_CAST_PTR
559 instead of using arithmetic.
561 Fully deployed the ACPI_PRINTF_LIKE macro. This macro was not being used
562 across all "printf-like" internal functions. Also, cleanup all calls to
563 such functions (both in 32-bit mode and 64-bit mode) now that they are
564 analyzed by the gcc compiler via ACPI_PRINTF_LIKE.
567 2) iASL Compiler/Disassembler and ACPICA tools:
569 iASL: implemented a new data table compiler flex/bison front-end. This
570 change is internal and is not intended to result in changes to the
571 compiled code. This new compiler front-end can be invoked using the -tp
572 option for now, until the old mechanism is removed.
574 ASLTS: Implemented a new data table compiler test suite. This test suite
575 generates all table templates and compile/disassemble/re-compile/binary-
578 iASL: return -1 if AML files were not generated due to compiler errors
580 iASL: added a warning on use of the now-legacy ASL Processor () keyword.
582 iASL: added an error on _UID object declaration that returns a String
583 within a Processor () declaration. A _UID for a processor must be an
586 iASL: added a null terminator to name strings that consist only of
587 multiple parent prefixes (^)
589 iASL: added support to compile both ASL and data table files in a single
592 Updated the tool generation project files that were recently migrated to
593 MSVC 2017 to eliminate all new warnings. The new project files appear in
594 the directory \acpica\generate\msvc2017. This change effectively
595 deprecates the older project files in \acpica\generate\msvc9.
598 ----------------------------------------
599 03 July 2019. Summary of changes for version 20190703:
602 1) ACPICA kernel-resident subsystem:
604 Remove legacy module-level support code. There were still some remnants
605 of the legacy module-level code executions. Since we no longer support
606 this option, this is essentially dead code and has been removed from the
609 iASL: ensure that _WAK, _PTS, _TTS, and _Sx are declared only at the root
610 scope. If these named objects are declared outside the root scope, they
611 will not be invoked by any host Operating System.
613 Clear status of GPEs on first direct enable. ACPI GPEs (other than the EC
614 one) can be enabled in two situations. First, the GPEs with existing _Lxx
615 and _Exx methods are enabled implicitly by ACPICA during system
616 initialization. Second, the GPEs without these methods (like GPEs listed
617 by _PRW objects for wakeup devices) need to be enabled directly by the
618 code that is going to use them (e.g. ACPI power management or device
621 In the former case, if the status of a given GPE is set to start with,
622 its handler method (either _Lxx or _Exx) needs to be invoked to take care
623 of the events (possibly) signaled before the GPE was enabled. In the
624 latter case, however, the first caller of AcpiEnableGpe() for a given GPE
625 should not be expected to care about any events that might be signaled
626 through it earlier. In that case, it is better to clear the status of
627 the GPE before enabling it, to prevent stale events from triggering
628 unwanted actions (like spurious system resume, for example).
630 For this reason, modify AcpiEvAddGpeReference() to take an additional
631 boolean argument indicating whether or not the GPE status needs to be
632 cleared when its reference counter changes from zero to one and make
633 AcpiEnableGpe() pass TRUE to it through that new argument.
636 2) iASL Compiler/Disassembler and ACPICA tools:
638 The tool generation process has been migrated to MSVC 2017, and all
639 project files have been upgraded. The new project files appear in the
640 directory \acpica\generate\msvc2017. This change effectively deprecates
641 the older project files in \acpica\generate\msvc9.
643 iASL: ensure that _WAK, _PTS, _TTS, and _Sx are declared only at the root
644 scope. If these named objects are declared outside the root scope, they
645 will not be invoked by any host Operating System
647 ----------------------------------------
648 09 May 2019. Summary of changes for version 20190509:
651 1) ACPICA kernel-resident subsystem:
653 Revert commit 6c43e1a ("ACPICA: Clear status of GPEs before enabling
654 them") that causes problems with Thunderbolt controllers to occur if a
655 dock device is connected at init time (the xhci_hcd and thunderbolt
656 modules crash which prevents peripherals connected through them from
657 working). Commit 6c43e1a effectively causes commit ecc1165b8b74 ("ACPICA:
658 Dispatch active GPEs at init time") to get undone, so the problem
659 addressed by commit ecc1165b8b74 appears again as a result of it.
662 2) iASL Compiler/Disassembler and ACPICA tools:
664 Reverted iASL: Additional forward reference detection. This change
665 reverts forward reference detection for field declarations. The feature
666 unintentionally emitted AML bytecode with incorrect package lengths for
667 some ASL code related to Fields and OperationRegions. This malformed AML
668 can cause systems to crash
669 during boot. The malformed AML bytecode is emitted in iASL version
670 20190329 and 20190405.
672 iASL: improve forward reference detection. This change improves forward
673 reference detection for named objects inside of scopes. If a parse object
674 has the OP_NOT_FOUND_DURING_LOAD set, it means that Op is a reference to
675 a named object that is declared later in the AML bytecode. This is
676 allowed if the reference is inside of a method and the declaration is
677 outside of a method like so:
688 However, if the declaration and reference are both in the same method or
689 outside any methods, this is a forward reference and should be marked as
690 an error because it would result in runtime errors.
694 Name (BUFF, Buffer (NUM0) {}) // Forward reference
700 Name (NUM1, 0x1) // Forward reference
705 iASL: Implemented additional buffer overflow analysis for BufferField
706 declarations. Check if a buffer index argument to a create buffer field
707 operation is beyond the end of the target buffer.
709 This affects these AML operators:
712 AML_CREATE_BIT_FIELD_OP
713 AML_CREATE_BYTE_FIELD_OP
714 AML_CREATE_WORD_FIELD_OP
715 AML_CREATE_DWORD_FIELD_OP
716 AML_CREATE_QWORD_FIELD_OP
718 There are three conditions that must be satisfied in order to allow this
719 validation at compile time:
721 1) The length of the target buffer must be an integer constant
722 2) The index specified in the create* must be an integer constant
723 3) For CreateField, the bit length argument must be non-zero.
726 Name (BUF1, Buffer() {1,2})
727 CreateField (BUF1, 7, 9, CF03) // 3: ERR
729 dsdt.asl 14: CreateField (BUF1, 7, 9, CF03) // 3: ERR
730 Error 6165 - ^ Buffer index beyond end of
734 ----------------------------------------
735 05 April 2019. Summary of changes for version 20190405:
738 1) ACPICA kernel-resident subsystem:
740 Event Manager: History: Commit 18996f2db918 ("ACPICA: Events: Stop
741 unconditionally clearing ACPI IRQs during suspend/resume") was added
742 earlier to stop clearing of event status bits unconditionally on suspend
743 and resume paths. Though this change fixed an issue on suspend path, it
744 introduced regressions on several resume paths. In the case of S0ix,
745 events are enabled as part of device suspend path. If status bits for the
746 events are set when they are enabled, it could result in premature wake
747 from S0ix. If status is cleared for any event that is being enabled so
748 that any stale events are cleared out. In case of S0ix, events are
749 enabled as part of device suspend path. If status bits for the events are
750 set when they are enabled, it could result in premature wake from S0ix.
752 This change ensures that status is cleared for any event that is being
753 enabled so that any stale events are cleared out.
756 2) iASL Compiler/Disassembler and ACPICA tools:
758 iASL: Implemented an enhanced multiple file compilation that combines
759 named objects from all input files to a single namespace. With this
760 feature, any unresolved external declarations as well as duplicate named
761 object declarations can be detected during compilation rather than
762 generating errors much later at runtime. The following commands are
763 examples that utilize this feature:
764 iasl dsdt.asl ssdt.asl
765 iasl dsdt.asl ssdt1.asl ssdt2.asl
766 iasl dsdt.asl ssdt*.asl
768 ----------------------------------------
769 29 March 2019. Summary of changes for version 20190329:
772 1) ACPICA kernel-resident subsystem:
774 Namespace support: Remove the address nodes from global list after method
775 termination. The global address list contains pointers to namespace nodes
776 that represent Operation Regions. This change properly removes Operation
777 Region namespace nodes that are declared dynamically during method
780 Linux: Use a different debug default than ACPICA. There was a divergence
781 between Linux and the ACPICA codebases. In order to resolve this
782 divergence, Linux now declares its own debug default in aclinux.h
784 Renamed some internal macros to improve code understanding and
785 maintenance. The macros below all operate on single 4-character ACPI
786 NameSegs, not generic strings (old -> new):
787 ACPI_NAME_SIZE -> ACPI_NAMESEG_SIZE
788 ACPI_COMPARE_NAME -> ACPI_COMPARE_NAMESEG
789 ACPI_MOVE_NAME -> ACPI_COPY_NAMESEG
791 Fix for missing comma in array declaration for the AcpiGbl_GenericNotify
794 Test suite: Update makefiles, add PCC operation region support
797 2) iASL Compiler/Disassembler and Tools:
799 iASL: Implemented additional illegal forward reference detection. Now
800 detect and emit an error upon detection of a forward reference from a
801 Field to an Operation Region. This will fail at runtime if allowed to
804 AcpiExec: Add an address list check for dynamic Operation Regions. This
805 feature performs a sanity test for each node the global address list.
806 This is done in order to ensure that all dynamic operation regions are
807 properly removed from the global address list and no dangling pointers
810 Disassembler: Improved generation of resource pathnames. This change
811 improves the code that generates resource descriptor and resource tag
812 pathnames. The original code used a bunch of str* C library functions
813 that caused warnings on some compilers.
815 iASL: Removed some uses of strncpy and replaced with memmove. The strncpy
816 function can overwrite buffers if the calling code is not very careful.
817 In the case of generating a module/table header, use of memmove is a
818 better implementation.
821 3) Status of new features that have not been completed at this time:
823 iASL: Implementing an enhanced multiple file compilation into a single
824 namespace feature (Status): This feature will be released soon, and
825 allows multiple ASL files to be compiled into the same single namespace.
826 By doing so, any unresolved external declarations as well as duplicate
827 named object declarations can be detected during compilation (rather than
828 later during runtime). The following commands are examples that utilize
830 iasl dsdt.asl ssdt.asl
831 iasl dsdt.asl ssdt1.asl ssdt2.asl
832 iasl dsdt.asl ssdt*.asl
834 ASL tutorial status: Feedback is being gathered internally and the
835 current plan is to publish this tutorial on the ACPICA website after a
836 final review by a tech writer.
838 ----------------------------------------
839 15 February 2019. Summary of changes for version 20190215:
842 0) Support for ACPI specification version 6.3:
844 Add PCC operation region support for the AML interpreter. This adds PCC
845 operation region support in the AML interpreter and a default handler for
846 acpiexec. The change also renames the PCC region address space keyword to
849 Support for new predefined methods _NBS, _NCH, _NIC, _NIH, and _NIG.
850 These methods provide OSPM with health information and device boot
853 PDTT: Add TriggerOrder to the PCC Identifier structure. The field value
854 defines if the trigger needs to be invoked by OSPM before or at the end
855 of kernel crash dump processing/handling operation.
857 SRAT: Add Generic Affinity Structure subtable. This subtable in the SRAT
858 is used for describing devices such as heterogeneous processors,
859 accelerators, GPUs, and IO devices with integrated compute or DMA
862 MADT: Add support for statistical profiling in GICC. Statistical
863 profiling extension (SPE) is an architecture-specific feature for ARM.
865 MADT: Add online capable flag. If this bit is set, system hardware
866 supports enabling this processor during OS runtime.
868 New Error Disconnect Recover Notification value. There are a number of
869 scenarios where system Firmware in collaboration with hardware may
870 disconnect one or more devices from the rest of the system for purposes
871 of error containment. Firmware can use this new notification value to
872 alert OSPM of such a removal.
874 PPTT: New additional fields in Processor Structure Flags. These flags
875 provide more information about processor topology.
877 NFIT/Disassembler: Change a field name from "Address Range" to "Region
880 HMAT updates: make several existing fields to be reserved as well as
881 rename subtable 0 to "memory proximity domain attributes".
883 GTDT: Add support for new GTDT Revision 3. This revision adds information
886 iASL: Update the HMAT example template for new fields.
888 iASL: Add support for the new revision of the GTDT (Rev 3).
891 1) ACPICA kernel-resident subsystem:
893 AML Parser: fix the main AML parse loop to correctly skip erroneous
894 extended opcodes. AML opcodes come in two lengths: 1-byte opcodes and 2-
895 byte extended opcodes. If an error occurs during an AML table load, the
896 AML parser will continue loading the table by skipping the offending
897 opcode. This implements a "load table at any cost" philosophy.
900 2) iASL Compiler/Disassembler and Tools:
902 iASL: Add checks for illegal object references, such as a reference
903 outside of method to an object within a method. Such an object is only
906 iASL: Emit error for creation of a zero-length operation region. Such a
907 region is rather pointless. If encountered, a runtime error is also
908 implemented in the interpreter.
910 Debugger: Fix a possible fault with the "test objects" command.
912 iASL: Makefile: support parent directory filenames containing embedded
915 iASL: Update the TPM2 template to revision 4.
917 iASL: Add the ability to report specific warnings or remarks as errors.
919 Disassembler: Disassemble OEMx tables as actual AML byte code.
920 Previously, these tables were treated as "unknown table".
922 iASL: Add definition and disassembly for TPM2 revision 3.
924 iASL: Add support for TPM2 rev 3 compilation.
927 ----------------------------------------
928 08 January 2019. Summary of changes for version 20190108:
931 1) ACPICA kernel-resident subsystem:
933 Updated all copyrights to 2019. This affects all source code modules.
936 2) iASL Compiler/Disassembler and Tools:
938 ASL test suite (ASLTS): Updated all copyrights to 2019.
940 Tools: Updated all signon copyrights to 2019.
942 AcpiExec: Added a new option to dump extra information concerning any
943 memory leaks detected by the internal object/cache tracking mechanism. -
946 iASL: Updated the table template for the TPM2 table to the newest version
947 of the table (Revision 4)
950 ----------------------------------------
951 13 December 2018. Summary of changes for version 20181213:
954 1) ACPICA Kernel-resident Subsystem:
956 Fixed some buffer length issues with the GenericSerialBus, related to two
957 of the bidirectional protocols: AttribRawProcessBytes and AttribRawBytes,
958 which are rarely seen in the field. For these, the LEN field of the ASL
959 buffer is now ignored. Hans de Goede
961 Implemented a new object evaluation trace mechanism for control methods
962 and data objects. This includes nested control methods. It is
963 particularly useful for examining the ACPI execution during system
964 initialization since the output is relatively terse. The flag below
965 enables the output of the trace via the ACPI_DEBUG_PRINT_RAW interface:
966 #define ACPI_LV_EVALUATION 0x00080000
969 Enter evaluation : _SB.PCI0._INI (Method)
970 Exit evaluation : _SB.PCI0._INI
971 Enter evaluation : _OSI (Method)
972 Exit evaluation : _OSI
973 Enter evaluation : _SB.PCI0.TEST (Method)
974 Nested method call : _SB.PCI0.NST1
975 Exit nested method : _SB.PCI0.NST1
976 Exit evaluation : _SB.PCI0.TEST
978 Added two recently-defined _OSI strings. See
979 https://docs.microsoft.com/en-us/windows-hardware/drivers/acpi/winacpi-
984 Update for buffer-to-string conversions via the ToHexString ASL operator.
985 A "0x" is now prepended to each of the hex values in the output string.
986 This provides compatibility with other ACPI implementations. The ACPI
987 specification is somewhat vague on this issue.
988 Example output string after conversion:
989 "0x01,0x02,0x03,0x04,0x05,0x06"
991 Return a run-time error for TermArg expressions within individual package
992 elements. Although this is technically supported by the ASL grammar,
993 other ACPI implementations do not support this either. Also, this fixes a
994 fault if this type of construct is ever encountered (it never has been).
997 2) iASL Compiler/Disassembler and Tools:
999 iASL: Implemented a new compile option (-ww) that will promote individual
1000 warnings and remarks to errors. This is intended to enhance the firmware
1003 AcpiExec: Implemented a new command-line option (-eo) to support the new
1004 object evaluation trace mechanism described above.
1006 Disassembler: Added support to disassemble OEMx tables as AML/ASL tables
1007 instead of a "unknown table" message.
1009 AcpiHelp: Improved support for the "special" predefined names such as
1010 _Lxx, _Exx, _EJx, _T_x, etc. For these, any legal hex value can now be
1011 used for "xx" and "x".
1013 ----------------------------------------
1014 31 October 2018. Summary of changes for version 20181031:
1017 An Operation Region regression was fixed by properly adding address
1018 ranges to a global list during initialization. This allows OS to
1019 accurately check for overlapping regions between native devices (such as
1020 PCI) and Operation regions as well as checking for region conflicts
1021 between two Operation Regions.
1023 Added support for the 2-byte extended opcodes in the code/feature that
1024 attempts to continue parsing during the table load phase. Skip parsing
1025 Device declarations (and other extended opcodes) when an error occurs
1026 during parsing. Previously, only single-byte opcodes were supported.
1028 Cleanup: Simplified the module-level code support by eliminating a
1029 useless global variable (AcpiGbl_GroupModuleLeveCode).
1032 2) iASL Compiler/Disassembler and Tools:
1034 iASL/Preprocessor: Fixed a regression where an incorrect use of ACPI_FREE
1035 could cause a fault in the preprocessor. This was an inadvertent side-
1036 effect from moving more allocations/frees to the local cache/memory
1039 iASL: Enhanced error detection by validating that all NameSeg elements
1040 within a NamePatch actually exist. The previous behavior was spotty at
1041 best, and such errors could be improperly ignored at compiler time (never
1042 at runtime, however. There are two new error messages, as shown in the
1045 dsdt.asl 33: CreateByteField (TTTT.BXXX, 1, CBF1)
1046 Error 6161 - ^ One or more objects within
1047 the Pathname do not exist (TTTT.BXXX)
1049 dsdt.asl 34: CreateByteField (BUF1, UUUU.INT1, BBBB.CBF1)
1050 Error 6160 - One or more prefix Scopes do not exist ^
1053 iASL: Disassembler/table-compiler: Added support for the static data
1054 table TPM2 revision 3 (an older version of TPM2). The support has been
1055 added for the compiler and the disassembler.
1057 Fixed compilation of DOS format data table file on Unix/Linux systems.
1058 iASL now properly detects line continuations (\) for DOS format data
1059 table definition language files on when executing on Unix/Linux.
1061 ----------------------------------------
1062 03 October 2018. Summary of changes for version 20181003:
1065 2) iASL Compiler/Disassembler and Tools:
1067 Fixed a regression introduced in version 20180927 that could cause the
1068 compiler to fault, especially with NamePaths containing one or more
1069 carats (^). Such as: ^^_SB_PCI0
1071 Added a new remark for the Sleep() operator when the sleep time operand
1072 is larger than one second. This is a very long time for the ASL/BIOS code
1073 and may not be what was intended by the ASL writer.
1075 ----------------------------------------
1076 27 September 2018. Summary of changes for version 20180927:
1079 1) ACPICA kernel-resident subsystem:
1081 Updated the GPE support to clear the status of all ACPI events when
1082 entering any/all sleep states in order to avoid premature wakeups. In
1083 theory, this may cause some wakeup events to be missed, but the
1084 likelihood of this is small. This change restores the original behavior
1085 of the ACPICA code in order to fix a regression seen from the previous
1086 "Stop unconditionally clearing ACPI IRQs during suspend/resume" change.
1087 This regression could cause some systems to incorrectly wake immediately.
1089 Updated the execution of the _REG methods during initialization and
1090 namespace loading to bring the behavior into closer conformance to the
1091 ACPI specification and other ACPI implementations:
1093 From the ACPI specification 6.2A, section 6.5.4 "_REG (Region):
1094 "Control methods must assume all operation regions are inaccessible
1095 until the _REG(RegionSpace, 1) method is executed"
1097 "The exceptions to this rule are:
1098 1. OSPM must guarantee that the following operation regions are always
1100 SystemIO operation regions.
1101 SystemMemory operation regions when accessing memory returned by the
1102 System Address Map reporting interfaces."
1104 Since the state of both the SystemIO and SystemMemory address spaces are
1105 defined by the specification to never change, this ACPICA change ensures
1106 that now _REG is never called on them. This solves some problems seen in
1107 the field and provides compatibility with other ACPI implementations. An
1108 update to the upcoming new version of the ACPI specification will help
1109 clarify this behavior.
1111 Updated the implementation of support for the Generic Serial Bus. For the
1112 "bidirectional" protocols, the internal implementation now automatically
1113 creates a return data buffer of the maximum size (255). This handles the
1114 worst-case for data that is returned from the serial bus handler, and
1115 fixes some problems seen in the field. This new buffer is directly
1116 returned to the ASL. As such, there is no true "bidirectional" buffer,
1117 which matches the ACPI specification. This is the reason for the "double
1118 store" seen in the example ASL code in the specification, shown below:
1120 Word Process Call (AttribProcessCall):
1121 OperationRegion(TOP1, GenericSerialBus, 0x00, 0x100)
1122 Field(TOP1, BufferAcc, NoLock, Preserve)
1124 FLD1, 8, // Virtual register at command value 1.
1127 Name(BUFF, Buffer(20){}) // Create GenericSerialBus data buffer
1129 CreateWordField(BUFF, 0x02, DATA) // DATA = Data (Word)
1131 Store(0x5416, DATA) // Save 0x5416 into the data buffer
1132 Store(Store(BUFF, FLD1), BUFF) // Invoke a write/read Process Call
1134 // This is the "double store". The write to
1135 // FLD1 returns a new buffer, which is stored
1136 // back into BUFF with the second Store.
1139 2) iASL Compiler/Disassembler and Tools:
1141 iASL: Implemented detection of extraneous/redundant uses of the Offset()
1142 operator within a Field Unit list. A remark is now issued for these. For
1143 example, the first two of the Offset() operators below are extraneous.
1144 Because both the compiler and the interpreter track the offsets
1145 automatically, these Offsets simply refer to the current offset and are
1146 unnecessary. Note, when optimization is enabled, the iASL compiler will
1147 in fact remove the redundant Offset operators and will not emit any AML
1150 OperationRegion (OPR1, SystemMemory, 0x100, 0x100)
1153 Offset (0), // Never needed
1155 Offset (4), // Redundant, offset is already 4 (bytes)
1157 Offset (64), // OK use of Offset.
1160 dsdt.asl 14: Offset (0),
1161 Remark 2158 - ^ Unnecessary/redundant use of Offset
1164 dsdt.asl 16: Offset (4),
1165 Remark 2158 - ^ Unnecessary/redundant use of Offset
1168 ----------------------------------------
1169 10 August 2018. Summary of changes for version 20180810:
1172 1) ACPICA kernel-resident subsystem:
1174 Initial ACPI table loading: Attempt to continue loading ACPI tables
1175 regardless of malformed AML. Since migrating table initialization to the
1176 new module-level code support, the AML interpreter rejected tables upon
1177 any ACPI error encountered during table load. This is a problem because
1178 non-serious ACPI errors during table load do not necessarily mean that
1179 the entire definition block (DSDT or SSDT) is invalid. This change
1180 improves the table loading by ignoring some types of errors that can be
1181 generated by incorrect AML. This can range from object type errors, scope
1182 errors, and index errors.
1184 Suspend/Resume support: Update to stop unconditionally clearing ACPI IRQs
1185 during suspend/resume. The status of ACPI events is no longer cleared
1186 when entering the ACPI S5 system state (power off) which caused some
1187 systems to power up immediately after turning off power in certain
1188 situations. This was a functional regression. It was fixed by clearing
1189 the status of all ACPI events again when entering S5 (for system-wide
1190 suspend or hibernation the clearing of the status of all events is not
1191 desirable, as it might cause the kernel to miss wakeup events sometimes).
1195 2) iASL Compiler/Disassembler and Tools:
1197 AcpiExec: Enhanced the -fi option (Namespace initialization file). Field
1198 elements listed in the initialization file were previously initialized
1199 after the table load and before executing module-level code blocks.
1200 Recent changes in the module-level code support means that the table load
1201 becomes a large control method execution. If fields are used within
1202 module-level code and we are executing with the -fi option, the
1203 initialization values were used to initialize the namespace object(s)
1204 only after the table was finished loading. This change Provides an early
1205 initialization of objects specified in the initialization file so that
1206 field unit values are populated during the table load (not after the
1209 AcpiExec: Fixed a small memory leak regression that could result in
1210 warnings during exit of the utility. These warnings were similar to
1212 0002D690 Length 0x0006 nsnames-0502 [Not a Descriptor - too small]
1213 0002CD70 Length 0x002C utcache-0453 [Operand] Integer RefCount 0x0001
1215 ----------------------------------------
1216 29 June 2018. Summary of changes for version 20180629:
1219 1) iASL Compiler/Disassembler and Tools:
1221 iASL: Fixed a regression related to the use of the ASL External
1222 statement. Error checking for the use of the External() statement has
1223 been relaxed. Previously, a restriction on the use of External meant that
1224 the referenced named object was required to be defined in a different
1225 table (an SSDT). Thus it would be an error to declare an object as an
1226 external and then define the same named object in the same table. For
1228 DefinitionBlock (...)
1231 Device (DEV1){...} // This was an error
1233 However, this behavior has caused regressions in some existing ASL code,
1234 because there is code that depends on named objects and externals (with
1235 the same name) being declared in the same table. This change will allow
1236 the ASL code above to compile without errors or warnings.
1238 iASL: Implemented ASL language extensions for four operators to make some
1239 of their arguments optional instead of required:
1240 1) Field (RegionName, AccessType, LockRule, UpdateRule)
1241 2) BankField (RegionName, BankName, BankValue,
1242 AccessType, LockRule, UpdateRule)
1243 3) IndexField (IndexName, DataName,
1244 AccessType, LockRule, UpdateRule)
1245 For the Field operators above, the AccessType, LockRule, and UpdateRule
1246 are now optional arguments. The default values are:
1249 UpdateRule: Preserve
1250 4) Mutex (MutexName, SyncLevel)
1251 For this operator, the SyncLevel argument is now optional. This argument
1252 is rarely used in any meaningful way by ASL code, and thus it makes sense
1253 to make it optional. The default value is:
1256 iASL: Attempted use of the ASL Unload() operator now results in the
1258 "Unload is not supported by all operating systems"
1259 This is in fact very true, and the Unload operator may be completely
1260 deprecated in the near future.
1262 AcpiExec: Fixed a regression for the -fi option (Namespace initialization
1263 file. Recent changes in the ACPICA module-level code support altered the
1264 table load/initialization sequence . This means that the table load has
1265 become a large method execution of the table itself. If Operation Region
1266 Fields are used within any module-level code and the -fi option was
1267 specified, the initialization values were populated only after the table
1268 had completely finished loading (and thus the module-level code had
1269 already been executed). This change moves the initialization of objects
1270 listed in the initialization file to before the table is executed as a
1271 method. Field unit values are now initialized before the table execution
1274 ----------------------------------------
1275 31 May 2018. Summary of changes for version 20180531:
1278 1) ACPICA kernel-resident Subsystem:
1280 Implemented additional support to help ensure that a DSDT or SSDT is
1281 fully loaded even if errors are incurred during the load. The majority of
1282 the problems that are seen is the failure of individual AML operators
1283 that occur during execution of any module-level code (MLC) existing in
1284 the table. This support adds a mechanism to abort the current ASL
1285 statement (AML opcode), emit an error message, and to simply move on to
1286 the next opcode -- instead of aborting the entire table load. This is
1287 different than the execution of a control method where the entire method
1288 is aborted upon any error. The goal is to perform a very "best effort" to
1289 load the ACPI tables. The most common MLC errors that have been seen in
1290 the field are direct references to unresolved ASL/AML symbols (referenced
1291 directly without the use of the CondRefOf operator to validate the
1292 symbol). This new ACPICA behavior is now compatible with other ACPI
1295 Interpreter: The Unload AML operator is no longer supported for the
1296 reasons below. An AE_NOT_IMPLEMENTED exception is returned.
1297 1) A correct implementation on at least some hosts may not be possible.
1298 2) Other ACPI implementations do not correctly/fully support it.
1299 3) It requires host device driver support which is not known to exist.
1300 (To properly support namespace unload out from underneath.)
1301 4) This AML operator has never been seen in the field.
1303 Parser: Added a debug option to dump AML parse sub-trees as they are
1304 being executed. Used with ACPI_DEBUG_PRINT, the enabling debug level is
1305 ACPI_DB_PARSE_TREES.
1307 Debugger: Reduced the verbosity for errors incurred during table load and
1308 module-level code execution.
1310 Completed an investigation into adding a namespace node "owner list"
1311 instead of the current "owner ID" associated with namespace nodes. This
1312 list would link together all nodes that are owned by an individual
1313 control method. The purpose would be to enhance control method execution
1314 by speeding up cleanup during method exit (all namespace nodes created by
1315 a method are deleted upon method termination.) Currently, the entire
1316 namespace must be searched for matching owner IDs if (and only if) the
1317 method creates named objects outside of the local scope. However, by far
1318 the most common case is that methods create objects locally, not outside
1319 the method scope. There is already an ACPICA optimization in place that
1320 only searches the entire namespace in the rare case of a method creating
1321 objects elsewhere in the namespace. Therefore, it is felt that the
1322 overhead of adding an additional pointer to each namespace node to
1323 implement the owner list makes this feature unnecessary.
1326 2) iASL Compiler/Disassembler and Tools:
1328 iASL, Disassembler, and Template generator: Implemented support for
1329 Revision D of the IORT table. Adds a new subtable that is used to specify
1330 SMMUv3 PMCGs. rmurphy-arm.
1332 Disassembler: Restored correct table header validation for the "special"
1333 ACPI tables -- RSDP and FACS. These tables do not contain a standard ACPI
1334 table header and must be special-cased. This was a regression that has
1335 been present for apparently a long time.
1337 AcpiExec: Reduced verbosity of the local exception handler implemented
1338 within acpiexec. This handler is invoked by ACPICA upon any exceptions
1339 generated during control method execution. A new option was added: -vh
1340 restores the original verbosity level if desired.
1342 AcpiExec: Changed the default base from decimal to hex for the -x option
1343 (set debug level). This simplifies the use of this option and matches the
1344 behavior of the corresponding iASL -x option.
1346 AcpiExec: Restored a force-exit on multiple control-c (sigint)
1347 interrupts. This allows program termination even if other issues cause
1348 the control-c to fail.
1350 ASL test suite (ASLTS): Added tests for the recently implemented package
1351 element resolution mechanism that allows forward references to named
1352 objects from individual package elements (this mechanism provides
1353 compatibility with other ACPI implementations.)
1356 ----------------------------------------
1357 8 May 2018. Summary of changes for version 20180508:
1360 1) ACPICA kernel-resident subsystem:
1362 Completed the new (recently deployed) package resolution mechanism for
1363 the Load and LoadTable ASL/AML operators. This fixes a regression that
1364 was introduced in version 20180209 that could result in an
1365 AE_AML_INTERNAL exception during the loading of a dynamic ACPI/AML table
1366 (SSDT) that contains package objects.
1369 2) iASL Compiler/Disassembler and Tools:
1371 AcpiDump and AcpiXtract: Implemented support for ACPI tables larger than
1372 1 MB. This change allows for table offsets within the acpidump file to be
1373 up to 8 characters. These changes are backwards compatible with existing
1377 ----------------------------------------
1378 27 April 2018. Summary of changes for version 20180427:
1381 1) ACPICA kernel-resident subsystem:
1383 Debugger: Added support for Package objects in the "Test Objects"
1384 command. This command walks the entire namespace and evaluates all named
1385 data objects (Integers, Strings, Buffers, and now Packages).
1387 Improved error messages for the namespace root node. Originally, the root
1388 was referred to by the confusing string "\___". This has been replaced by
1389 "Namespace Root" for clarification.
1391 Fixed a potential infinite loop in the AcpiRsDumpByteList function. Colin
1392 Ian King <colin.king@canonical.com>.
1395 2) iASL Compiler/Disassembler and Tools:
1397 iASL: Implemented support to detect and flag illegal forward references.
1398 For compatibility with other ACPI implementations, these references are
1399 now illegal at the root level of the DSDT or SSDTs. Forward references
1400 have always been illegal within control methods. This change should not
1401 affect existing ASL/AML code because of the fact that these references
1402 have always been illegal in the other ACPI implementation.
1404 iASL: Added error messages for the case where a table OEM ID and OEM
1405 TABLE ID strings are longer than the ACPI-defined length. Previously,
1406 these strings were simply silently truncated.
1408 iASL: Enhanced the -tc option (which creates an AML hex file in C,
1409 suitable for import into a firmware project):
1410 1) Create a unique name for the table, to simplify use of multiple
1412 2) Add a protection #ifdef in the file, similar to a .h header file.
1413 With assistance from Sami Mujawar, sami.mujawar@arm.com and Evan Lloyd,
1416 AcpiExec: Added a new option, -df, to disable the local fault handler.
1417 This is useful during debugging, where it may be desired to drop into a
1418 debugger on a fault.
1420 ----------------------------------------
1421 13 March 2018. Summary of changes for version 20180313:
1424 1) ACPICA kernel-resident subsystem:
1426 Implemented various improvements to the GPE support:
1428 1) Dispatch all active GPEs at initialization time so that no GPEs are
1430 2) Enable runtime GPEs earlier. Some systems expect GPEs to be enabled
1431 before devices are enumerated.
1432 3) Don't unconditionally clear ACPI IRQs during suspend/resume, so that
1434 4) Add parallel GPE handling to eliminate the possibility of dispatching
1436 5) Dispatch any pending GPEs after enabling for the first time.
1438 AcpiGetObjectInfo - removed support for the _STA method. This was causing
1439 problems on some platforms.
1441 Added a new _OSI string, "Windows 2017.2".
1443 Cleaned up and simplified the module-level code support. These changes
1444 are in preparation for the eventual removal of the legacy MLC support
1445 (deferred execution), replaced by the new MLC architecture which executes
1446 the MLC as a table is loaded (DSDT/SSDTs).
1448 Changed a compile-time option to a runtime option. Changes the option to
1449 ignore ACPI table load-time package resolution errors into a runtime
1450 option. Used only for platforms that generate many AE_NOT_FOUND errors
1451 during boot. AcpiGbl_IgnorePackageResolutionErrors.
1453 Fixed the ACPI_ERROR_NAMESPACE macro. This change involves putting some
1454 ACPI_ERROR_NAMESPACE parameters inside macros. By doing so, we avoid
1455 compilation errors from unused variables (seen with some compilers).
1458 2) iASL Compiler/Disassembler and Tools:
1460 ASLTS: parallelized execution in order to achieve an (approximately) 2X
1461 performance increase.
1463 ASLTS: Updated to use the iASL __LINE__ and __METHOD__ macros. Improves
1466 ----------------------------------------
1467 09 February 2018. Summary of changes for version 20180209:
1470 1) ACPICA kernel-resident subsystem:
1472 Completed the final integration of the recent changes to Package Object
1473 handling and the module-level AML code support. This allows forward
1474 references from individual package elements when the package object is
1475 declared from within module-level code blocks. Provides compatibility
1476 with other ACPI implementations.
1478 The new architecture for the AML module-level code has been completed and
1479 is now the default for the ACPICA code. This new architecture executes
1480 the module-level code in-line as the ACPI table is loaded/parsed instead
1481 of the previous architecture which deferred this code until after the
1482 table was fully loaded. This solves some ASL code ordering issues and
1483 provides compatibility with other ACPI implementations. At this time,
1484 there is an option to fallback to the earlier architecture, but this
1485 support is deprecated and is planned to be completely removed later this
1488 Added a compile-time option to ignore AE_NOT_FOUND exceptions during
1489 resolution of named reference elements within Package objects. Although
1490 this is potentially a serious problem, it can generate a lot of
1491 noise/errors on platforms whose firmware carries around a bunch of unused
1492 Package objects. To disable these errors, define
1493 ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS in the OS-specific header. All
1494 errors are always reported for ACPICA applications such as AcpiExec.
1496 Fixed a regression related to the explicit type-conversion AML operators
1497 (ToXXXX). The regression was introduced early in 2017 but was not seen
1498 until recently because these operators are not fully supported by other
1499 ACPI implementations and are thus rarely used by firmware developers. The
1500 operators are defined by the ACPI specification to not implement the
1501 "implicit result object conversion". The regression incorrectly
1502 introduced this object conversion for the following explicit conversion
1513 2) iASL Compiler/Disassembler and Tools:
1515 iASL: Fixed a problem with the compiler constant folding feature as
1516 related to the ToXXXX explicit conversion operators. These operators do
1517 not support the "implicit result object conversion" by definition. Thus,
1518 ASL expressions that use these operators cannot be folded to a simple
1519 Store operator because Store implements the implicit conversion. This
1520 change uses the CopyObject operator for the ToXXXX operator folding
1521 instead. CopyObject is defined to not implement implicit result
1522 conversions and is thus appropriate for folding the ToXXXX operators.
1524 iASL: Changed the severity of an error condition to a simple warning for
1525 the case where a symbol is declared both locally and as an external
1526 symbol. This accommodates existing ASL code.
1528 AcpiExec: The -ep option to enable the new architecture for module-level
1529 code has been removed. It is replaced by the -dp option which instead has
1530 the opposite effect: it disables the new architecture (the default) and
1531 enables the legacy architecture. When the legacy code is removed in the
1532 future, the -dp option will be removed also.
1534 ----------------------------------------
1535 05 January 2018. Summary of changes for version 20180105:
1538 1) ACPICA kernel-resident subsystem:
1540 Updated all copyrights to 2018. This affects all source code modules.
1542 Fixed a possible build error caused by an unresolved reference to the
1543 AcpiUtSafeStrncpy function.
1545 Removed NULL pointer arithmetic in the various pointer manipulation
1546 macros. All "(void *) NULL" constructs are converted to "(void *) 0".
1547 This eliminates warnings/errors in newer C compilers. Jung-uk Kim.
1549 Added support for A32 ABI compilation, which uses the ILP32 model. Anuj
1553 2) iASL Compiler/Disassembler and Tools:
1555 ASLTS: Updated all copyrights to 2018.
1557 Tools: Updated all signon copyrights to 2018.
1559 AcpiXtract: Fixed a regression related to ACPI table signatures where the
1560 signature was truncated to 3 characters (instead of 4).
1562 AcpiExec: Restore the original terminal mode after the use of the -v and
1565 ASLTS: Deployed the iASL __METHOD__ macro across the test suite.
1567 ----------------------------------------
1568 14 December 2017. Summary of changes for version 20171214:
1571 1) ACPICA kernel-resident subsystem:
1573 Fixed a regression in the external (public) AcpiEvaluateObjectTyped
1574 interface where the optional "pathname" argument had inadvertently become
1575 a required argument returning an error if omitted (NULL pointer
1578 Fixed two possible memory leaks related to the recently developed "late
1579 resolution" of reference objects within ASL Package Object definitions.
1581 Added two recently defined _OSI strings: "Windows 2016" and "Windows
1582 2017". Mario Limonciello.
1584 Implemented and deployed a safer version of the C library function
1585 strncpy: AcpiUtSafeStrncpy. The intent is to at least prevent the
1586 creation of unterminated strings as a possible result of a standard
1589 Cleaned up and restructured the global variable file (acglobal.h). There
1590 are many changes, but no functional changes.
1593 2) iASL Compiler/Disassembler and Tools:
1595 iASL Table Compiler: Fixed a problem with the DBG2 ACPI table where the
1596 optional OemData field at the end of the table was incorrectly required
1597 for proper compilation. It is now correctly an optional field.
1599 ASLTS: The entire suite was converted from standard ASL to the ASL+
1600 language, using the ASL-to-ASL+ converter which is integrated into the
1601 iASL compiler. A binary compare of all output files has verified the
1602 correctness of the conversion.
1604 iASL: Fixed the source code build for platforms where "char" is unsigned.
1605 This affected the iASL lexer only. Jung-uk Kim.
1607 ----------------------------------------
1608 10 November 2017. Summary of changes for version 20171110:
1611 1) ACPICA kernel-resident subsystem:
1613 This release implements full support for ACPI 6.2A:
1614 NFIT - Added a new subtable, "Platform Capabilities Structure"
1615 No other changes to ACPICA were required, since ACPI 6.2A is primarily an
1616 errata release of the specification.
1618 Other ACPI table changes:
1619 IORT: Added the SMMUv3 Device ID mapping index. Hanjun Guo
1620 PPTT: Added cache attribute flag definitions to actbl1.h. Jeremy
1623 Utilities: Modified the string/integer conversion functions to use
1624 internal 64-bit divide support instead of a native divide. On 32-bit
1625 platforms, a 64-bit divide typically requires a library function which
1626 may not be present in the build (kernel or otherwise).
1628 Implemented a targeted error message for timeouts returned from the
1629 Embedded Controller device driver. This is seen frequently enough to
1630 special-case an AE_TIME returned from an EC operation region access:
1631 "Timeout from EC hardware or EC device driver"
1633 Changed the "ACPI Exception" message prefix to "ACPI Error" so that all
1634 runtime error messages have the identical prefix.
1637 2) iASL Compiler/Disassembler and Tools:
1639 AcpiXtract: Fixed a problem with table header detection within the
1640 acpidump file. Processing a table could be ended early if a 0x40 (@)
1641 appears in the original binary table, resulting in the @ symbol appearing
1642 in the decoded ASCII field at the end of the acpidump text line. The
1643 symbol caused acpixtract to incorrectly think it had reached the end of
1644 the current table and the beginning of a new table.
1646 AcpiXtract: Added an option (-f) to ignore some errors during table
1647 extraction. This initial implementation ignores non-ASCII and non-
1648 printable characters found in the acpidump text file.
1650 TestSuite(ASLTS)/AcpiExec: Fixed and restored the memory usage statistics
1651 for ASLTS. This feature is used to track memory allocations from
1652 different memory caches within the ACPICA code. At the end of an ASLTS
1653 run, these memory statistics are recorded and stored in a log file.
1655 Debugger (user-space version): Implemented a simple "Background" command.
1656 Creates a new thread to execute a control method in the background, while
1657 control returns to the debugger prompt to allow additional commands.
1658 Syntax: Background <Namepath> [Arguments]
1660 ----------------------------------------
1661 29 September 2017. Summary of changes for version 20170929:
1664 1) ACPICA kernel-resident subsystem:
1666 Redesigned and implemented an improved ASL While() loop timeout
1667 mechanism. This mechanism is used to prevent infinite loops in the kernel
1668 AML interpreter caused by either non-responsive hardware or incorrect AML
1669 code. The new implementation uses AcpiOsGetTimer instead of a simple
1670 maximum loop count, and is thus more accurate and constant across
1671 different machines. The default timeout is currently 30 seconds, but this
1672 may be adjusted later.
1674 Renamed the ACPI_AML_INFINITE_LOOP exception to AE_AML_LOOP_TIMEOUT to
1675 better reflect the new implementation of the loop timeout mechanism.
1677 Updated the AcpiGetTimerDuration interface to cleanup the 64-bit support
1678 and to fix an off-by-one error. Jung-uk Kim.
1680 Fixed an EFI build problem by updating the makefiles to for a new file
1681 that was added, utstrsuppt.c
1684 2) iASL Compiler/Disassembler and Tools:
1686 Implemented full support for the PDTT, SDEV, and TPM2 ACPI tables. This
1687 includes support in the table disassembler, compiler, and template
1690 iASL: Added an exception for an illegal type of recursive method
1691 invocation. If a method creates named objects, the first recursive call
1692 will fail at runtime. This change adds an error detection at compile time
1693 to catch the problem up front. Note: Marking such a method as
1694 "serialized" will not help with this problem, because the same thread can
1695 acquire the method mutex more than once. Example compiler and runtime
1704 dsdt.asl 22: MTH1 ()
1705 Error 6152 - ^ Illegal recursive call to method
1706 that creates named objects (MTH1)
1708 Previous runtime exception:
1709 ACPI Error: [INT1] Namespace lookup failure,
1710 AE_ALREADY_EXISTS (20170831/dswload2-465)
1712 iASL: Updated support for External() opcodes to improve namespace
1713 management and error detection. These changes are related to issues seen
1714 with multiple-segment namespace pathnames within External declarations,
1717 External(\_SB.PCI0.GFX0, DeviceObj)
1718 External(\_SB.PCI0.GFX0.ALSI)
1720 iASL: Implemented support for multi-line error/warning messages. This
1721 enables more detailed and helpful error messages as below, from the
1722 initial deployment for the duplicate names error:
1724 DSDT.iiii 1692: Device(PEG2) {
1725 Error 6074 - ^ Name already exists in scope
1728 Original name creation/declaration below:
1729 DSDT.iiii 93: External(\_SB.PCI0.PEG2, DeviceObj)
1731 AcpiXtract: Added additional flexibility to support differing input hex
1732 dump formats. Specifically, hex dumps that contain partial disassembly
1733 and/or comments within the ACPI table data definition. There exist some
1734 dump utilities seen in the field that create this type of hex dump (such
1735 as Simics). For example:
1737 DSDT @ 0xdfffd0c0 (10999 bytes)
1745 Creator_id 1280593481
1746 Creator_revision 537399345
1747 0000: 44 53 44 54 f7 2a 00 00 01 f3 42 58 50 43 00 00
1749 2af0: 5f 4c 30 46 00 a4 01
1751 Test suite: Miscellaneous changes/fixes:
1752 More cleanup and simplification of makefiles
1753 Continue compilation of test cases after a compile failure
1754 Do not perform binary compare unless both files actually exist
1756 iASL: Performed some code/module restructuring. Moved all memory
1757 allocation functions to new modules. Two new files, aslallocate.c and
1760 ----------------------------------------
1761 31 August 2017. Summary of changes for version 20170831:
1764 1) ACPICA kernel-resident subsystem:
1766 Implemented internal support for full 64-bit addresses that appear in all
1767 Generic Address Structure (GAS) structures. Previously, only the lower 32
1768 bits were used. Affects the use of GAS structures in the FADT and other
1769 tables, as well as the GAS structures passed to the AcpiRead and
1770 AcpiWrite public external interfaces that are used by drivers. Lv Zheng.
1772 Added header support for the PDTT ACPI table (Processor Debug Trigger
1773 Table). Full support in the iASL Data Table Compiler and disassembler is
1777 2) iASL Compiler/Disassembler and Tools:
1779 iASL/Disassembler: Fixed a problem with the PPTT ACPI table (Processor
1780 Properties Topology Table) where a flag bit was specified in the wrong
1781 bit position ("Line Size Valid", bit 6).
1783 iASL: Implemented support for Octal integer constants as defined by the
1784 ASL language grammar, per the ACPI specification. Any integer constant
1785 that starts with a zero is an octal constant. For example,
1786 Store (037777, Local0) /* Octal constant */
1787 Store (0x3FFF, Local0) /* Hex equivalent */
1788 Store (16383, Local0) /* Decimal equivalent */
1790 iASL: Improved overflow detection for 64-bit string conversions during
1791 compilation of integer constants. "Overflow" in this case means a string
1792 that represents an integer that is too large to fit into a 64-bit value.
1793 Any 64-bit constants within a 32-bit DSDT or SSDT are still truncated to
1794 the low-order 32 bits with a warning, as previously implemented. Several
1795 new exceptions are defined that indicate a 64-bit overflow, as well as
1796 the base (radix) that was used during the attempted conversion. Examples:
1797 Local0 = 0xAAAABBBBCCCCDDDDEEEEFFFF // AE_HEX_OVERFLOW
1798 Local0 = 01111222233334444555566667777 // AE_OCTAL_OVERFLOW
1799 Local0 = 11112222333344445555666677778888 // AE_DECIMAL_OVERFLOW
1801 iASL: Added a warning for the case where a ResourceTemplate is declared
1802 with no ResourceDescriptor entries (coded as "ResourceTemplate(){}"). In
1803 this case, the resulting template is created with a single END_TAG
1804 descriptor, which is essentially useless.
1806 iASL: Expanded the -vw option (ignore specific warnings/remarks) to
1807 include compilation error codes as well.
1809 ----------------------------------------
1810 28 July 2017. Summary of changes for version 20170728:
1813 1) ACPICA kernel-resident subsystem:
1815 Fixed a regression seen with small resource descriptors that could cause
1816 an inadvertent AE_AML_NO_RESOURCE_END_TAG exception.
1818 AML interpreter: Implemented a new feature that allows forward references
1819 from individual named references within package objects that are
1820 contained within blocks of "module-level code". This provides
1821 compatibility with other ACPI implementations and supports existing
1822 firmware that depends on this feature. Example:
1825 If (ABCD) /* An If() at module-level */
1827 Name (PKG1, Package()
1829 INT1 /* Forward reference to object INT1
1835 AML Interpreter: Fixed a problem with the Alias() operator where aliases
1836 to some ASL objects were not handled properly. Objects affected are:
1837 Mutex, Event, and OperationRegion.
1839 AML Debugger: Enhanced to properly handle AML Alias objects. These
1840 objects have one level of indirection which was not fully supported by
1843 Table Manager: Added support to detect and ignore duplicate SSDTs within
1844 the XSDT/RSDT. This error in the XSDT has been seen in the field.
1846 EFI and EDK2 support:
1847 Enabled /WX flag for MSVC builds
1848 Added support for AcpiOsStall, AcpiOsSleep, and AcpiOsGetTimer
1849 Added local support for 64-bit multiply and shift operations
1850 Added support to compile acpidump.efi on Windows
1851 Added OSL function stubs for interfaces not used under EFI
1853 Added additional support for the _DMA predefined name. _DMA returns a
1854 buffer containing a resource template. This change add support within the
1855 resource manager (AcpiWalkResourceBuffer) to walk and parse this list of
1856 resource descriptors. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
1859 2) iASL Compiler/Disassembler and Tools:
1861 iASL: Fixed a problem where the internal input line buffer(s) could
1862 overflow if there are very long lines in the input ASL source code file.
1863 Implemented buffer management that automatically increases the size of
1864 the buffers as necessary.
1866 iASL: Added an option (-vx) to "expect" particular remarks, warnings and
1867 errors. If the specified exception is not raised during compilation, the
1868 compiler emits an error. This is intended to support the ASL test suite,
1869 but may be useful in other contexts.
1871 iASL: Implemented a new predefined macro, __METHOD__, which returns a
1872 string containing the name of the current control method that is being
1875 iASL: Implemented debugger and table compiler support for the SDEI ACPI
1876 table (Software Delegated Exception Interface). James Morse
1877 <james.morse@arm.com>
1879 Unix/Linux makefiles: Added an option to disable compile optimizations.
1880 The disable occurs when the NOOPT flag is set to TRUE.
1881 theracermaster@gmail.com
1883 Acpidump: Added support for multiple DSDT and FACS tables. This can occur
1884 when there are different tables for 32-bit versus 64-bit.
1886 Enhanced error reporting for the ASL test suite (ASLTS) by removing
1887 unnecessary/verbose text, and emit the actual line number where an error
1888 has occurred. These changes are intended to improve the usefulness of the
1891 ----------------------------------------
1892 29 June 2017. Summary of changes for version 20170629:
1895 1) ACPICA kernel-resident subsystem:
1897 Tables: Implemented a deferred ACPI table verification. This is useful
1898 for operating systems where the tables cannot be verified in the early
1899 initialization stage due to early memory mapping limitations on some
1900 architectures. Lv Zheng.
1902 Tables: Removed the signature validation for dynamically loaded tables.
1903 Provides compatibility with other ACPI implementations. Previously, only
1904 SSDT tables were allowed, as per the ACPI specification. Now, any table
1905 signature can be used via the Load() operator. Lv Zheng.
1907 Tables: Fixed several mutex issues that could cause errors during table
1908 acquisition. Lv Zheng.
1910 Tables: Fixed a problem where an ACPI warning could be generated if a
1911 null pointer was passed to the AcpiPutTable interface. Lv Zheng.
1913 Tables: Added a mechanism to handle imbalances for the AcpiGetTable and
1914 AcpiPutTable interfaces. This applies to the "late stage" table loading
1915 when the use of AcpiPutTable is no longer required (since the system
1916 memory manager is fully running and available). Lv Zheng.
1918 Fixed/Reverted a regression during processing of resource descriptors
1919 that contain only a single EndTag. Fixes an AE_AML_NO_RESOURCE_END_TAG
1920 exception in this case.
1922 Headers: IORT/SMMU support: Updated the SMMU models for Revision C of the
1923 I/O Remapping specification. Robin Murphy <robin.murphy@arm.com>
1925 Interpreter: Fixed a possible fault if an Alias operator with an invalid
1926 or duplicate target is encountered during Alias creation in
1927 AcpiExCreateAlias. Alex James <theracermaster@gmail.com>
1929 Added an option to use designated initializers for function pointers.
1930 Kees Cook <keescook@google.com>
1933 2) iASL Compiler/Disassembler and Tools:
1935 iASL: Allow compilation of External declarations with target pathnames
1936 that refer to existing named objects within the table. Erik Schmauss.
1938 iASL: Fixed a regression when compiling FieldUnits. Fixes an error if a
1939 FieldUnit name also is declared via External in the same table. Erik
1942 iASL: Allow existing scope names within pathnames used in External
1943 statements. For example:
1944 External (ABCD.EFGH) // ABCD exists, but EFGH is truly external
1947 iASL: IORT ACPI table: Implemented changes required to decode the new
1948 Proximity Domain for the SMMUv3 IORT. Disassembler and Data Table
1949 compiler. Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
1951 Disassembler: Don't abort disassembly on errors from External()
1952 statements. Erik Schmauss.
1954 Disassembler: fixed a possible fault when one of the Create*Field
1955 operators references a Resource Template. ACPICA Bugzilla 1396.
1957 iASL: In the source code, resolved some naming inconsistences across the
1958 parsing support. Fixes confusion between "Parse Op" and "Parse Node".
1959 Adds a new file, aslparseop.c
1961 ----------------------------------------
1962 31 May 2017. Summary of changes for version 20170531:
1965 0) ACPI 6.2 support:
1967 The ACPI specification version 6.2 has been released and is available at
1968 http://uefi.org/specifications
1970 This version of ACPICA fully supports the ACPI 6.2 specification. Changes
1971 are summarized below.
1973 New ACPI tables (Table Compiler/Disassembler/Templates):
1974 HMAT (Heterogeneous Memory Attributes Table)
1975 WSMT (Windows SMM Security Mitigation Table)
1976 PPTT (Processor Properties Topology Table)
1978 New subtables for existing ACPI tables:
1979 HEST (New subtable, Arch-deferred machine check)
1980 SRAT (New subtable, Arch-specific affinity structure)
1981 PCCT (New subtables, Extended PCC subspaces (types 3 and 4))
1983 Simple updates for existing ACPI tables:
1984 BGRT (two new flag bits)
1985 HEST (New bit defined for several subtables, GHES_ASSIST)
1987 New Resource Descriptors and Resource macros (Compiler/Disassembler):
1993 New type for hardware error notification (section 18.3.2.9)
1995 New predefined names/methods (Compiler/Interpreter):
1996 _HMA (Heterogeneous Memory Attributes)
1997 _LSI (Label Storage Information)
1998 _LSR (Label Storage Read)
1999 _LSW (Label Storage Write)
2001 ASL grammar/macro changes (Compiler):
2002 For() ASL macro, implemented with the AML while operator
2003 Extensions to Concatenate operator
2004 Support for multiple definition blocks in same ASL file
2005 Clarification for Buffer operator
2006 Allow executable AML code underneath all scopes (Devices, etc.)
2007 Clarification/change for the _OSI return value
2008 ASL grammar update for reference operators
2009 Allow a zero-length string for AML filename in DefinitionBlock
2012 New device object notification value
2013 Remove a notify value (0x0C) for graceful shutdown
2014 New UUIDs for processor/cache properties and
2015 physical package property
2016 New _HID, ACPI0014 (Wireless Power Calibration Device)
2019 1) ACPICA kernel-resident subsystem:
2021 Added support to disable ACPI events on hardware-reduced platforms.
2022 Eliminates error messages of the form "Could not enable fixed event". Lv
2025 Fixed a problem using Device/Thermal objects with the ObjectType and
2026 DerefOf ASL operators. This support had not been fully/properly
2029 Fixed a problem where if a Buffer object containing a resource template
2030 was longer than the actual resource template, an error was generated --
2031 even though the AML is legal. This case has been seen in the field.
2033 Fixed a problem with the header definition of the MADT PCAT_COMPAT flag.
2034 The values for DUAL_PIC and MULTIPLE_APIC were reversed.
2036 Added header file changes for the TPM2 ACPI table. Update to new version
2037 of the TCG specification. Adds a new TPM2 subtable for ARM SMC.
2039 Exported the external interfaces AcpiAcquireMutex and AcpiReleaseMutex.
2040 These interfaces are intended to be used only in conjunction with the
2041 predefined _DLM method (Device Lock Method). "This object appears in a
2042 device scope when AML access to the device must be synchronized with the
2045 Example Code and Data Size: These are the sizes for the OS-independent
2046 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2047 debug version of the code includes the debug output trace mechanism and
2048 has a much larger code and data size.
2051 Non-Debug Version: 143.1K Code, 60.0K Data, 203.1K Total
2052 Debug Version: 204.0K Code, 84.3K Data, 288.3K Total
2054 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
2055 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
2058 2) iASL Compiler/Disassembler and Tools:
2060 iASL: Fixed a problem where an External() declaration could not refer to
2061 a Field Unit. Erik Schmauss.
2063 Disassembler: Improved support for the Switch/Case operators. This
2064 feature will disassemble AML code back to the original Switch operators
2065 when possible, instead of an If..Else sequence. David Box
2067 iASL and disassembler: Improved the handling of multiple extraneous
2068 parentheses for both ASL input and disassembled ASL output.
2070 Improved the behavior of the iASL compiler and disassembler to detect
2071 improper use of external declarations
2073 Disassembler: Now aborts immediately upon detection of an unknown AML
2074 opcode. The AML parser has no real way to recover from this, and can
2075 result in the creation of an ill-formed parse tree that causes errors
2076 later during the disassembly.
2078 All tools: Fixed a problem where the Unix application OSL did not handle
2079 control-c correctly. For example, a control-c could incorrectly wake the
2082 AcpiExec: Improved the Control-C handling and added a handler for
2083 segmentation faults (SIGSEGV). Supports both Windows and Unix-like
2086 Reduced the verbosity of the generic unix makefiles. Previously, each
2087 compilation displayed the full set of compiler options. This has been
2088 eliminated as the options are easily inspected within the makefiles. Each
2089 compilation now results in a single line of output.
2091 ----------------------------------------
2092 03 March 2017. Summary of changes for version 20170303:
2095 0) ACPICA licensing:
2097 The licensing information at the start of each source code module has
2098 been updated. In addition to the Intel license, the dual GPLv2/BSD
2099 license has been added for completeness. Now, a single version of the
2100 source code should be suitable for all ACPICA customers. This is the
2101 major change for this release since it affects all source code modules.
2104 1) ACPICA kernel-resident subsystem:
2106 Fixed two issues with the common asltypes.h header that could cause
2107 problems in some environments: (Kim Jung-uk)
2108 Removed typedef for YY_BUFFER_STATE ?
2109 Fixes an error with earlier versions of Flex.
2110 Removed use of FILE typedef (which is only defined in stdio.h)
2113 2) iASL Compiler/Disassembler and Tools:
2115 Disassembler: fixed a regression introduced in 20170224. A fix for a
2116 memory leak related to resource descriptor tags (names) could fault when
2117 the disassembler was generated with 64-bit compilers.
2119 The ASLTS test suite has been updated to implement a new testing
2120 architecture. During generation of the suite from ASL source, both the
2121 ASL and ASL+ compilers are now validated, as well as the disassembler
2122 itself (Erik Schmauss). The architecture executes as follows:
2124 For every ASL source module:
2125 Compile (legacy ASL compilation)
2126 Disassemble the resulting AML to ASL+ source code
2127 Compile the new ASL+ module
2128 Perform a binary compare on the legacy AML and the new ASL+ AML
2129 The ASLTS suite then executes normally using the AML binaries.
2131 ----------------------------------------
2132 24 February 2017. Summary of changes for version 20170224:
2135 1) ACPICA kernel-resident subsystem:
2137 Interpreter: Fixed two issues with the control method return value auto-
2138 repair feature, where an attempt to double-delete an internal object
2139 could result in an ACPICA warning (for _CID repair and others). No fault
2140 occurs, however, because the attempted deletion (actually a release to an
2141 internal cache) is detected and ignored via object poisoning.
2143 Debugger: Fixed an AML interpreter mutex issue during the single stepping
2144 of control methods. If certain debugger commands are executed during
2145 stepping, a mutex acquire/release error could occur. Lv Zheng.
2147 Fixed some issues generating ACPICA with the Intel C compiler by
2148 restoring the original behavior and compiler-specific include file in
2151 Example Code and Data Size: These are the sizes for the OS-independent
2152 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2153 debug version of the code includes the debug output trace mechanism and
2154 has a much larger code and data size.
2157 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
2158 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
2160 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
2161 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
2164 2) iASL Compiler/Disassembler and Tools:
2166 iASL/Disassembler: A preliminary version of a new ASL-to-ASL+ conversion
2167 tool has been designed, implemented, and included in this release. The
2168 key feature of this utility is that the original comments within the
2169 input ASL file are preserved during the conversion process, and included
2170 within the converted ASL+ file -- thus creating a transparent conversion
2171 of existing ASL files to ASL+ (ASL 2.0). Erik Schmauss.
2173 Usage: iasl -ca <ASL-filename> // Output is a .dsl file with
2176 iASL/Disassembler: Improved the detection and correct disassembly of
2177 Switch/Case operators. This feature detects sequences of if/elseif/else
2178 operators that originated from ASL Switch/Case/Default operators and
2179 emits the original operators. David Box.
2181 iASL: Improved the IORT ACPI table support in the following areas. Lv
2183 Clear MappingOffset if the MappingCount is zero.
2184 Fix the disassembly of the SMMU GSU interrupt offset.
2185 Update the template file for the IORT table.
2187 Disassembler: Enhanced the detection and disassembly of resource
2188 template/descriptor within a Buffer object. An EndTag descriptor is now
2189 required to have a zero second byte, since all known ASL compilers emit
2190 this. This helps eliminate incorrect decisions when a buffer is
2191 disassembled (false positives on resource templates).
2193 ----------------------------------------
2194 19 January 2017. Summary of changes for version 20170119:
2197 1) General ACPICA software:
2199 Entire source code base: Added the 2017 copyright to all source code
2200 legal/licensing module headers and utility/tool signons. This includes
2201 the standard Linux dual-license header. This affects virtually every file
2202 in the ACPICA core subsystem, iASL compiler, all ACPICA utilities, and
2203 the ACPICA test suite.
2206 2) iASL Compiler/Disassembler and Tools:
2208 iASL: Removed/fixed an inadvertent remark when a method argument
2209 containing a reference is used as a target operand within the method (and
2210 never used as a simple argument), as in the example below. Jeffrey Hugo.
2212 dsdt.asl 1507: Store(0x1, Arg0)
2213 Remark 2146 - ^ Method Argument is never used (Arg0)
2215 All tools: Removed the bit width of the compiler that generated the tool
2216 from the common signon for all user space tools. This proved to be
2217 confusing and unnecessary. This includes similar removal of HARDWARE_NAME
2218 from the generic makefiles (Thomas Petazzoni). Example below.
2221 ASL+ Optimizing Compiler version 20170119-32
2222 ASL+ Optimizing Compiler version 20170119-64
2225 ASL+ Optimizing Compiler version 20170119
2227 ----------------------------------------
2228 22 December 2016. Summary of changes for version 20161222:
2231 1) ACPICA kernel-resident subsystem:
2233 AML Debugger: Implemented a new mechanism to simplify and enhance
2234 debugger integration into all environments, including kernel debuggers
2235 and user-space utilities, as well as remote debug services. This
2236 mechanism essentially consists of new OSL interfaces to support debugger
2237 initialization/termination, as well as wait/notify interfaces to perform
2238 the debugger handshake with the host. Lv Zheng.
2241 AcpiOsInitializeDebugger (void)
2242 AcpiOsTerminateDebugger (void)
2243 AcpiOsWaitCommandReady (void)
2244 AcpiOsNotifyCommandComplete (void)
2246 New OS services layer:
2247 osgendbg.c -- Example implementation, and used for AcpiExec
2249 Update for Generic Address Space (GAS) support: Although the AccessWidth
2250 and/or BitOffset fields of the GAS are not often used, this change now
2251 fully supports these fields. This affects the internal support for FADT
2252 registers, registers in other ACPI data tables, and the AcpiRead and
2253 AcpiWrite public interfaces. Lv Zheng.
2255 Sleep support: In order to simplify integration of ACPI sleep for the
2256 various host operating systems, a new OSL interface has been introduced.
2257 AcpiOsEnterSleep allows the host to perform any required operations
2258 before the final write to the sleep control register(s) is performed by
2262 AcpiOsEnterSleep(SleepState, RegisterAValue, RegisterBValue)
2264 Called from these internal interfaces:
2268 EFI support: Added a very small EFI/ACPICA example application. Provides
2269 a simple demo for EFI integration, as well as assisting with resolution
2270 of issues related to customer ACPICA/EFI integration. Lv Zheng. See:
2272 source/tools/efihello/efihello.c
2274 Local C library: Implemented several new functions to enhance ACPICA
2275 portability, for environments where these clib functions are not
2276 available (such as EFI). Lv Zheng:
2283 Fixed a regression where occasionally a valid resource descriptor was
2284 incorrectly detected as invalid at runtime, and a
2285 AE_AML_NO_RESOURCE_END_TAG was returned.
2287 Fixed a problem with the recently implemented support that enables
2288 control method invocations as Target operands to many ASL operators.
2289 Warnings of this form: "Needed type [Reference], found [Processor]" were
2290 seen at runtime for some method invocations.
2292 Example Code and Data Size: These are the sizes for the OS-independent
2293 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2294 debug version of the code includes the debug output trace mechanism and
2295 has a much larger code and data size.
2298 Non-Debug Version: 141.5K Code, 58.5K Data, 200.0K Total
2299 Debug Version: 201.7K Code, 82.7K Data, 284.4K Total
2301 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
2302 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
2305 2) iASL Compiler/Disassembler and Tools:
2307 Disassembler: Enhanced output by adding the capability to detect and
2308 disassemble ASL Switch/Case statements back to the original ASL source
2309 code instead of if/else blocks. David Box.
2311 AcpiHelp: Split a large file into separate files based upon
2312 functionality/purpose. New files are:
2316 ----------------------------------------
2317 17 November 2016. Summary of changes for version 20161117:
2320 1) ACPICA kernel-resident subsystem:
2322 Table Manager: Fixed a regression introduced in 20160729, "FADT support
2323 cleanup". This was an attempt to remove all references in the source to
2324 the FADT version 2, which never was a legal version number. It was
2325 skipped because it was an early version of 64-bit support that was
2326 eventually abandoned for the current 64-bit support.
2328 Interpreter: Fixed a problem where runtime implicit conversion was
2329 incorrectly disabled for the ASL operators below. This brings the
2330 behavior into compliance with the ACPI specification:
2338 Table Manager: Added a new public interface, AcpiPutTable, used to
2339 release and free an ACPI table returned by AcpiGetTable and related
2340 interfaces. Lv Zheng.
2342 Example Code and Data Size: These are the sizes for the OS-independent
2343 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2344 debug version of the code includes the debug output trace mechanism and
2345 has a much larger code and data size.
2348 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
2349 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
2351 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
2352 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
2355 2) iASL Compiler/Disassembler and Tools:
2357 Disassembler: Fixed a regression for disassembly of Resource Template.
2358 Detection of templates in the AML stream missed some types of templates.
2360 iASL: Fixed a problem where an Access Size error was returned for the PCC
2361 address space when the AccessSize of the GAS register is greater than a
2364 iASL: Implemented several grammar changes for the operators below. These
2365 changes are slated for the next version of the ACPI specification:
2366 RefOf - Disallow method invocation as an operand
2367 CondRefOf - Disallow method invocation as an operand
2368 DerefOf - Disallow operands that use the result from operators
2370 do not return a reference (Changed TermArg to
2373 iASL: Control method invocations are now allowed for Target operands, as
2374 per the ACPI specification. Removed error for using a control method
2375 invocation as a Target operand.
2377 Disassembler: Improved detection of Resource Templates, Unicode, and
2378 Strings within Buffer objects. These subtypes do not contain a specific
2379 opcode to indicate the originating ASL code, and they must be detected by
2380 other means within the disassembler.
2382 iASL: Implemented an optimization improvement for 32-bit ACPI tables
2383 (DSDT/SSDT). For the 32-bit case only, compute the optimum integer opcode
2384 only after 64-bit to 32-bit truncation. A truncation warning message is
2385 still emitted, however.
2387 AcpiXtract: Implemented handling for both types of line terminators (LF
2388 or CR/LF) so that it can accept AcpiDump output files from any system.
2391 AcpiBin: Added two new options for comparing AML files:
2392 -a: compare and display ALL mismatches
2393 -o: start compare at this offset into the second file
2395 ----------------------------------------
2396 30 September 2016. Summary of changes for version 20160930:
2399 1) ACPICA kernel-resident subsystem:
2401 Fixed a regression in the internal AcpiTbFindTable function where a non
2402 AE_OK exception could inadvertently be returned even if the function did
2403 not fail. This problem affects the following operators:
2407 Fixed a regression in the LoadTable operator where a load to any
2408 namespace location other than the root no longer worked properly.
2410 Increased the maximum loop count value that will result in the
2411 AE_AML_INFINITE_LOOP exception. This is a mechanism that is intended to
2412 prevent infinite loops within the AML interpreter and thus the host OS
2413 kernel. The value is increased from 0xFFFF to 0xFFFFF loops (65,535 to
2416 Moved the AcpiGbl_MaxLoopIterations configuration variable to the public
2417 acpixf.h file. This allows hosts to easily configure the maximum loop
2420 Removed an illegal character in the strtoul64.c file. This character
2421 caused errors with some C compilers.
2423 Example Code and Data Size: These are the sizes for the OS-independent
2424 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2425 debug version of the code includes the debug output trace mechanism and
2426 has a much larger code and data size.
2429 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
2430 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
2432 Non-Debug Version: 140.0K Code, 58.1K Data, 198.1K Total
2433 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
2436 2) iASL Compiler/Disassembler and Tools:
2438 Disassembler: Fixed a problem with the conversion of Else{If{ blocks into
2439 the simpler ASL ElseIf keyword. During the conversion, a trailing If
2440 block could be lost and missing from the disassembled output.
2442 iASL: Fixed a missing parser rule for the ObjectType operator. For ASL+,
2443 the missing rule caused a parse error when using the Index operator as an
2444 operand to ObjectType. This construct now compiles properly. Example:
2445 ObjectType(PKG1[4]).
2447 iASL: Correctly handle unresolved symbols in the hardware map file (-lm
2448 option). Previously, unresolved symbols could cause a protection fault.
2449 Such symbols are now marked as unresolved in the map file.
2451 iASL: Implemented support to allow control method invocations as an
2452 operand to the ASL DeRefOf operator. Example:
2453 DeRefOf(MTH1(Local0))
2455 Disassembler: Improved support for the ToPLD ASL macro. Detection of a
2456 possible _PLD buffer now includes examination of both the normal buffer
2457 length (16 or 20) as well as the surrounding AML package length.
2459 Disassembler: Fixed a problem with the decoding of complex expressions
2460 within the Divide operator for ASL+. For the case where both the quotient
2461 and remainder targets are specified, the entire statement cannot be
2462 disassembled. Previously, the output incorrectly contained a mix of ASL-
2463 and ASL+ operators. This mixed statement causes a syntax error when
2465 Divide (Add (INT1, 6), 128, RSLT, QUOT) // was incorrectly
2467 Divide (INT1 + 6, 128, RSLT, QUOT)
2469 iASL/Tools: Added support to process AML and non-AML ACPI tables
2470 consistently. For the disassembler and AcpiExec, allow all types of ACPI
2471 tables (AML and data tables). For the iASL -e option, allow only AML
2474 ----------------------------------------
2475 31 August 2016. Summary of changes for version 20160831:
2478 1) ACPICA kernel-resident subsystem:
2480 Improve support for the so-called "module-level code", which is defined
2481 to be math, logical and control AML opcodes that appear outside of any
2482 control method. This change improves the support by adding more opcodes
2483 that can be executed in the manner. Some other issues have been solved,
2484 and the ASL grammar changes to support such code under all scope
2485 operators (Device, etc.) are complete. Lv Zheng.
2487 UEFI support: these OSL functions have been implemented. This is an
2488 additional step toward supporting the AcpiExec utility natively (with
2489 full hardware access) under UEFI. Marcelo Ferreira.
2490 AcpiOsReadPciConfiguration
2491 AcpiOsWritePciConfiguration
2493 Fixed a possible mutex error during control method auto-serialization. Lv
2496 Updated support for the Generic Address Structure by fully implementing
2497 all GAS fields when a 32-bit address is expanded to a 64-bit GAS. Lv
2500 Updated the return value for the internal _OSI method. Instead of
2501 0xFFFFFFFF, the "Ones" value is now returned, which is 0xFFFFFFFFFFFFFFFF
2502 for 64-bit ACPI tables. This fixes an incompatibility with other ACPI
2503 implementations, and will be reflected and clarified in the next version
2504 of the ACPI specification.
2506 Implemented two new table events that can be passed to an ACPICA table
2507 handler. These events are used to indicate a table installation or
2508 uninstallation. These events are used in addition to existed table load
2509 and unload events. Lv Zheng.
2511 Implemented a cleanup for all internal string-to-integer conversions.
2512 Consolidate multiple versions of this functionality and limit possible
2513 bases to either 10 or 16 to simplify the code. Adds a new file,
2516 Cleanup the inclusion order of the various compiler-specific headers.
2517 This simplifies build configuration management. The compiler-specific
2518 headers are now split out from the host-specific headers. Lv Zheng.
2520 Example Code and Data Size: These are the sizes for the OS-independent
2521 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2522 debug version of the code includes the debug output trace mechanism and
2523 has a much larger code and data size.
2526 Non-Debug Version: 140.1K Code, 58.1K Data, 198.1K Total
2527 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
2530 2) iASL Compiler/Disassembler and Tools:
2532 iASL/AcpiExec: Added a command line option to display the build date/time
2533 of the tool (-vd). This can be useful to verify that the correct version
2534 of the tools are being used.
2536 AML Debugger: Implemented a new subcommand ("execute predef") to execute
2537 all predefined control methods and names within the current namespace.
2538 This can be useful for debugging problems with ACPI tables and the ACPI
2541 ----------------------------------------
2542 29 July 2016. Summary of changes for version 20160729:
2545 1) ACPICA kernel-resident subsystem:
2547 Implemented basic UEFI support for the various ACPICA tools. This
2549 1) An OSL to implement the various AcpiOs* interfaces on UEFI.
2550 2) Support to obtain the ACPI tables on UEFI.
2551 3) Local implementation of required C library functions not available on
2553 4) A front-end (main) function for the tools for UEFI-related
2556 The initial deployment of this support is the AcpiDump utility executing
2557 as an UEFI application via EDK2 (EDKII, "UEFI Firmware Development Kit").
2558 Current environments supported are Linux/Unix. MSVC generation is not
2559 supported at this time. See the generate/efi/README file for build
2560 instructions. Lv Zheng.
2562 Future plans include porting the AcpiExec utility to execute natively on
2563 the platform with I/O and memory access. This will allow viewing/dump of
2564 the platform namespace and native execution of ACPI control methods that
2565 access the actual hardware. To fully implement this support, the OSL
2566 functions below must be implemented with UEFI interfaces. Any community
2567 help in the implementation of these functions would be appreciated:
2572 AcpiOsReadPciConfiguration
2573 AcpiOsWritePciConfiguration
2575 Restructured and standardized the C library configuration for ACPICA,
2576 resulting in the various configuration options below. This includes a
2577 global restructuring of the compiler-dependent and platform-dependent
2578 include files. These changes may affect the existing platform-dependent
2579 configuration files on some hosts. Lv Zheng.
2581 The current C library configuration options appear below. For any issues,
2582 it may be helpful to examine the existing compiler-dependent and
2583 platform-dependent files as examples. Lv Zheng.
2586 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
2588 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
2589 2) Unix/Windows/BSD applications:
2590 ACPI_USE_STANDARD_HEADERS=y in order to use system-provided C
2592 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
2593 3) UEFI applications:
2594 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
2596 ACPI_USE_SYSTEM_CLIBRARY=n in order to use ACPICA mini C library.
2597 4) UEFI applications (EDK2/StdLib):
2598 ACPI_USE_STANDARD_HEADERS=y in order to use EDK2 StdLib C library.
2599 ACPI_USE_SYSTEM_CLIBRARY=y in order to use EDK2 StdLib C library.
2602 AML interpreter: "module-level code" support. Allows for execution of so-
2603 called "executable" AML code (math/logical operations, etc.) outside of
2604 control methods not just at the module level (top level) but also within
2605 any scope declared outside of a control method - Scope{}, Device{},
2606 Processor{}, PowerResource{}, and ThermalZone{}. Lv Zheng.
2608 Simplified the configuration of the "maximum AML loops" global option by
2609 adding a global public variable, "AcpiGbl_MaxLoopIterations" which can be
2610 modified at runtime.
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: 139.1K Code, 22.9K Data, 162.0K Total
2620 Debug Version: 199.0K Code, 81.8K Data, 280.8K Total
2623 2) iASL Compiler/Disassembler and Tools:
2625 iASL: Add full support for the RASF ACPI table (RAS Features Table).
2626 Includes disassembler, data table compiler, and header support.
2628 iASL Expand "module-level code" support. Allows for
2629 compilation/disassembly of so-called "executable" AML code (math/logical
2630 operations, etc.) outside of control methods not just at the module level
2631 (top level) but also within any scope declared outside of a control
2632 method - Scope{}, Device{}, Processor{}, PowerResource{}, and
2635 AcpiDump: Added support for dumping all SSDTs on newer versions of
2636 Windows. These tables are now easily available -- SSDTs are not available
2637 through the registry on older versions.
2639 ----------------------------------------
2640 27 May 2016. Summary of changes for version 20160527:
2643 1) ACPICA kernel-resident subsystem:
2645 Temporarily reverted the new arbitrary bit length/alignment support in
2646 AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been
2647 a number of regressions with the new code that need to be fully resolved
2648 and tested before this support can be finally integrated into ACPICA.
2649 Apologies for any inconveniences these issues may have caused.
2651 The ACPI message macros are not configurable (ACPI_MSG_ERROR,
2652 ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR,
2653 and ACPI_MSG_BIOS_WARNING). Lv Zheng.
2655 Fixed a couple of GCC warnings associated with the use of the -Wcast-qual
2656 option. Adds a new return macro, return_STR. Junk-uk Kim.
2658 Example Code and Data Size: These are the sizes for the OS-independent
2659 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2660 debug version of the code includes the debug output trace mechanism and
2661 has a much larger code and data size.
2664 Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
2665 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
2667 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
2668 Debug Version: 200.9K Code, 82.2K Data, 283.1K Total
2670 ----------------------------------------
2671 22 April 2016. Summary of changes for version 20160422:
2673 1) ACPICA kernel-resident subsystem:
2675 Fixed a regression in the GAS (generic address structure) arbitrary bit
2676 support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior
2677 and incorrect return values. Lv Zheng. ACPICA BZ 1270.
2679 ACPI 6.0: Added support for new/renamed resource macros. One new argument
2680 was added to each of these macros, and the original name has been
2681 deprecated. The AML disassembler will always disassemble to the new
2682 names. Support for the new macros was added to iASL, disassembler,
2683 resource manager, and the acpihelp utility. ACPICA BZ 1274.
2685 I2cSerialBus -> I2cSerialBusV2
2686 SpiSerialBus -> SpiSerialBusV2
2687 UartSerialBus -> UartSerialBusV2
2689 ACPI 6.0: Added support for a new integer field that was appended to the
2690 package object returned by the _BIX method. This adds iASL compile-time
2691 and AML runtime error checking. ACPICA BZ 1273.
2693 ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm
2694 Subspace Type2" (Headers, Disassembler, and data table compiler).
2696 Example Code and Data Size: These are the sizes for the OS-independent
2697 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2698 debug version of the code includes the debug output trace mechanism and
2699 has a much larger code and data size.
2702 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
2703 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
2705 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
2706 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
2709 2) iASL Compiler/Disassembler and Tools:
2711 iASL: Implemented an ASL grammar extension to allow/enable executable
2712 "module-level code" to be created and executed under the various
2713 operators that create new scopes. This type of AML code is already
2714 supported in all known AML interpreters, and the grammar change will
2715 appear in the next version of the ACPI specification. Simplifies the
2716 conditional runtime creation of named objects under these object types:
2724 iASL: Implemented a new ASL extension, a "For" loop macro to add greater
2725 ease-of-use to the ASL language. The syntax is similar to the
2726 corresponding C operator, and is implemented with the existing AML While
2727 opcode -- thus requiring no changes to existing AML interpreters.
2729 For (Initialize, Predicate, Update) {TermList}
2734 Initializer // Nothing | TermArg => ComputationalData
2735 Predicate // Nothing | TermArg => ComputationalData
2736 Update // Nothing | TermArg => ComputationalData
2740 iASL: The _HID/_ADR detection and validation has been enhanced to search
2741 under conditionals in order to allow these objects to be conditionally
2744 iASL: Fixed several issues with the constant folding feature. The
2745 improvement allows better detection and resolution of statements that can
2746 be folded at compile time. ACPICA BZ 1266.
2748 iASL/Disassembler: Fixed a couple issues with the Else{If{}...}
2749 conversion to the ASL ElseIf operator where incorrect ASL code could be
2752 iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where
2753 sometimes an extra (and extraneous) set of parentheses were emitted for
2754 some combinations of operators. Although this did not cause any problems
2755 with recompilation of the disassembled code, it made the code more
2756 difficult to read. David Box. ACPICA BZ 1231.
2758 iASL: Changed to ignore the unreferenced detection for predefined names
2759 of resource descriptor elements, when the resource descriptor is
2760 created/defined within a control method.
2762 iASL: Disassembler: Fix a possible fault with externally declared Buffer
2765 ----------------------------------------
2766 18 March 2016. Summary of changes for version 20160318:
2768 1) ACPICA kernel-resident subsystem:
2770 Added support for arbitrary bit lengths and bit offsets for registers
2771 defined by the Generic Address Structure. Previously, only aligned bit
2772 lengths of 8/16/32/64 were supported. This was sufficient for many years,
2773 but recently some machines have been seen that require arbitrary bit-
2774 level support. ACPICA BZ 1240. Lv Zheng.
2776 Fixed an issue where the \_SB._INI method sometimes must be evaluated
2777 before any _REG methods are evaluated. Lv Zheng.
2779 Implemented several changes related to ACPI table support
2780 (Headers/Disassembler/TableCompiler):
2781 NFIT: For ACPI 6.1, updated to add some additional new fields and
2783 FADT: Updated a warning message and set compliance to ACPI 6.1 (Version
2785 DMAR: Added new constants per the 10/2014 DMAR spec.
2786 IORT: Added new subtable per the 10/2015 IORT spec.
2787 HEST: For ACPI 6.1, added new constants and new subtable.
2788 DBG2: Added new constants per the 12/2015 DBG2 spec.
2789 FPDT: Fixed several incorrect fields, add the FPDT boot record structure.
2791 ERST/EINJ: Updated disassembler with new "Execute Timings" actions.
2793 Updated header support for the DMAR table to match the current version of
2796 Added extensions to the ASL Concatenate operator to allow any ACPI object
2797 to be passed as an operand. Any object other than Integer/String/Buffer
2798 simply returns a string containing the object type. This extends the
2799 usefulness of the Printf macros. Previously, Concatenate would abort the
2800 control method if a non-data object was encountered.
2802 ACPICA source code: Deployed the C "const" keyword across the source code
2803 where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).
2805 Example Code and Data Size: These are the sizes for the OS-independent
2806 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2807 debug version of the code includes the debug output trace mechanism and
2808 has a much larger code and data size.
2811 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
2812 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
2814 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
2815 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
2818 2) iASL Compiler/Disassembler and Tools:
2820 iASL/Disassembler: Improved the heuristic used to determine the number of
2821 arguments for an externally defined control method (a method in another
2822 table). Although this is an improvement, there is no deterministic way to
2823 "guess" the number of method arguments. Only the ACPI 6.0 External opcode
2824 will completely solve this problem as it is deployed (automatically) in
2827 iASL/Disassembler: Fixed an ordering issue for emitted External() ASL
2828 statements that could cause errors when the disassembled file is
2829 compiled. ACPICA BZ 1243. David Box.
2831 iASL: Fixed a regression caused by the merger of the two versions of the
2832 local strtoul64. Because of a dependency on a global variable, strtoul64
2833 could return an error for integers greater than a 32-bit value. ACPICA BZ
2836 iASL: Fixed a regression where a fault could occur for an ASL Return
2837 statement if it invokes a control method that is not resolved. ACPICA BZ
2840 AcpiXtract: Improved input file validation: detection of binary files and
2841 non-acpidump text files.
2843 ----------------------------------------
2844 12 February 2016. Summary of changes for version 20160212:
2846 1) ACPICA kernel-resident subsystem:
2848 Implemented full support for the ACPI 6.1 specification (released in
2849 January). This version of the specification is available at:
2850 http://www.uefi.org/specifications
2852 Only a relatively small number of changes were required in ACPICA to
2853 support ACPI 6.1, in these areas:
2854 - New predefined names
2856 - A new subtable for HEST
2857 - A few other header changes for new values
2859 Ensure \_SB_._INI is executed before any _REG methods are executed. There
2860 appears to be existing BIOS code that relies on this behavior. Lv Zheng.
2862 Reverted a change made in version 20151218 which enabled method
2863 invocations to be targets of various ASL operators (SuperName and Target
2864 grammar elements). While the new behavior is supported by the ACPI
2865 specification, other AML interpreters do not support this behavior and
2866 never will. The ACPI specification will be updated for ACPI 6.2 to remove
2867 this support. Therefore, the change was reverted to the original ACPICA
2870 ACPICA now supports the GCC 6 compiler.
2872 Current Release: (Note: build changes increased sizes)
2873 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
2874 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
2876 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
2877 Debug Version: 200.4K Code, 81.9K Data, 282.3K Total
2880 2) iASL Compiler/Disassembler and Tools:
2882 Completed full support for the ACPI 6.0 External() AML opcode. The
2883 compiler emits an external AML opcode for each ASL External statement.
2884 This opcode is used by the disassembler to assist with the disassembly of
2885 external control methods by specifying the required number of arguments
2886 for the method. AML interpreters do not use this opcode. To ensure that
2887 interpreters do not even see the opcode, a block of one or more external
2888 opcodes is surrounded by an "If(0)" construct. As this feature becomes
2889 commonly deployed in BIOS code, the ability of disassemblers to correctly
2890 disassemble AML code will be greatly improved. David Box.
2892 iASL: Implemented support for an optional cross-reference output file.
2893 The -lx option will create a the cross-reference file with the suffix
2894 "xrf". Three different types of cross-reference are created in this file:
2895 - List of object references made from within each control method
2896 - Invocation (caller) list for each user-defined control method
2897 - List of references to each non-method object in the namespace
2899 iASL: Method invocations as ASL Target operands are now disallowed and
2900 flagged as errors in preparation for ACPI 6.2 (see the description of the
2903 ----------------------------------------
2904 8 January 2016. Summary of changes for version 20160108:
2906 1) ACPICA kernel-resident subsystem:
2908 Updated all ACPICA copyrights and signons to 2016: Added the 2016
2909 copyright to all source code module headers and utility/tool signons.
2910 This includes the standard Linux dual-license header. This affects
2911 virtually every file in the ACPICA core subsystem, iASL compiler, all
2912 ACPICA utilities, and the ACPICA test suite.
2914 Fixed a regression introduced in version 20151218 concerning the
2915 execution of so-called module-level ASL/AML code. Namespace objects
2916 created under a module-level If() construct were not properly/fully
2917 entered into the namespace and could cause an interpreter fault when
2920 Example Code and Data Size: These are the sizes for the OS-independent
2921 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2922 debug version of the code includes the debug output trace mechanism and
2923 has a much larger code and data size.
2926 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
2927 Debug Version: 200.4K Code, 81.9K Data, 282.4K Total
2929 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
2930 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
2933 2) iASL Compiler/Disassembler and Tools:
2935 Fixed a problem with the compilation of the GpioIo and GpioInt resource
2936 descriptors. The _PIN field name was incorrectly defined to be an array
2937 of 32-bit values, but the _PIN values are in fact 16 bits each. This
2938 would cause incorrect bit width warnings when using Word (16-bit) fields
2939 to access the descriptors.
2942 ----------------------------------------
2943 18 December 2015. Summary of changes for version 20151218:
2945 1) ACPICA kernel-resident subsystem:
2947 Implemented per-AML-table execution of "module-level code" as individual
2948 ACPI tables are loaded into the namespace during ACPICA initialization.
2949 In other words, any module-level code within an AML table is executed
2950 immediately after the table is loaded, instead of batched and executed
2951 after all of the tables have been loaded. This provides compatibility
2952 with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng,
2955 To fully support the feature above, the default operation region handlers
2956 for the SystemMemory, SystemIO, and PCI_Config address spaces are now
2957 installed before any ACPI tables are loaded. This enables module-level
2958 code to access these address spaces during the table load and module-
2959 level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David
2962 Implemented several changes to the internal _REG support in conjunction
2963 with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples
2964 utilities for the changes above. Although these tools were changed, host
2965 operating systems that simply use the default handlers for SystemMemory,
2966 SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.
2968 For example, in the code below, DEV1 is conditionally added to the
2969 namespace by the DSDT via module-level code that accesses an operation
2970 region. The SSDT references DEV1 via the Scope operator. DEV1 must be
2971 created immediately after the DSDT is loaded in order for the SSDT to
2972 successfully reference DEV1. Previously, this code would cause an
2973 AE_NOT_EXIST exception during the load of the SSDT. Now, this code is
2974 fully supported by ACPICA.
2976 DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
2978 OperationRegion (OPR1, SystemMemory, 0x400, 32)
2979 Field (OPR1, AnyAcc, NoLock, Preserve)
2990 DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
2992 External (\DEV1, DeviceObj)
2998 Fixed an AML interpreter problem where control method invocations were
2999 not handled correctly when the invocation was itself a SuperName argument
3000 to another ASL operator. In these cases, the method was not invoked.
3001 ACPICA BZ 1002. Affects the following ASL operators that have a SuperName
3006 Decrement, Increment
3009 Signal, Release, Reset
3012 Implemented automatic String-to-ObjectReference conversion support for
3013 packages returned by predefined names (such as _DEP). A common BIOS error
3014 is to add double quotes around an ObjectReference namepath, which turns
3015 the reference into an unexpected string object. This support detects the
3016 problem and corrects it before the package is returned to the caller that
3017 invoked the method. Lv Zheng.
3019 Implemented extensions to the Concatenate operator. Concatenate now
3020 accepts any type of object, it is not restricted to simply
3021 Integer/String/Buffer. For objects other than these 3 basic data types,
3022 the argument is treated as a string containing the name of the object
3023 type. This expands the utility of Concatenate and the Printf/Fprintf
3024 macros. ACPICA BZ 1222.
3026 Cleaned up the output of the ASL Debug object. The timer() value is now
3027 optional and no longer emitted by default. Also, the basic data types of
3028 Integer/String/Buffer are simply emitted as their values, without a data
3029 type string -- since the data type is obvious from the output. ACPICA BZ
3032 Example Code and Data Size: These are the sizes for the OS-independent
3033 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3034 debug version of the code includes the debug output trace mechanism and
3035 has a much larger code and data size.
3038 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
3039 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
3041 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
3042 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
3045 2) iASL Compiler/Disassembler and Tools:
3047 iASL: Fixed some issues with the ASL Include() operator. This operator
3048 was incorrectly defined in the iASL parser rules, causing a new scope to
3049 be opened for the code within the include file. This could lead to
3050 several issues, including allowing ASL code that is technically illegal
3051 and not supported by AML interpreters. Note, this does not affect the
3052 related #include preprocessor operator. ACPICA BZ 1212.
3054 iASL/Disassembler: Implemented support for the ASL ElseIf operator. This
3055 operator is essentially an ASL macro since there is no AML opcode
3056 associated with it. The code emitted by the iASL compiler for ElseIf is
3057 an Else opcode followed immediately by an If opcode. The disassembler
3058 will now emit an ElseIf if it finds an Else immediately followed by an
3059 If. This simplifies the decoded ASL, especially for deeply nested
3060 If..Else and large Switch constructs. Thus, the disassembled code more
3061 closely follows the original source ASL. ACPICA BZ 1211. Example:
3073 ElseIf (Arg0 == 0x02)
3078 AcpiExec: Added support for the new module level code behavior and the
3079 early region installation. This required a small change to the
3080 initialization, since AcpiExec must install its own operation region
3083 AcpiExec: Added support to make the debug object timer optional. Default
3084 is timer disabled. This cleans up the debug object output -- the timer
3085 data is rarely used.
3087 AcpiExec: Multiple ACPI tables are now loaded in the order that they
3088 appear on the command line. This can be important when there are
3089 interdependencies/references between the tables.
3091 iASL/Templates. Add support to generate template files with multiple
3092 SSDTs within a single output file. Also added ommand line support to
3093 specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ
3097 ----------------------------------------
3098 24 November 2015. Summary of changes for version 20151124:
3100 1) ACPICA kernel-resident subsystem:
3102 Fixed a possible regression for a previous update to FADT handling. The
3103 FADT no longer has a fixed table ID, causing some issues with code that
3104 was hardwired to a specific ID. Lv Zheng.
3106 Fixed a problem where the method auto-serialization could interfere with
3107 the current SyncLevel. This change makes the auto-serialization support
3108 transparent to the SyncLevel support and management.
3110 Removed support for the _SUB predefined name in AcpiGetObjectInfo. This
3111 interface is intended for early access to the namespace during the
3112 initial namespace device discovery walk. The _SUB method has been seen to
3113 access operation regions in some cases, causing errors because the
3114 operation regions are not fully initialized.
3116 AML Debugger: Fixed some issues with the terminate/quit/exit commands
3117 that can cause faults. Lv Zheng.
3119 AML Debugger: Add thread ID support so that single-step mode only applies
3120 to the AML Debugger thread. This prevents runtime errors within some
3123 Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx
3124 methods that are invoked by this interface are optional, removed warnings
3125 emitted for the case where one or more of these methods do not exist.
3126 ACPICA BZ 1208, original change by Prarit Bhargava.
3128 Made a major pass through the entire ACPICA source code base to
3129 standardize formatting that has diverged a bit over time. There are no
3130 functional changes, but this will of course cause quite a few code
3131 differences from the previous ACPICA release.
3133 Example Code and Data Size: These are the sizes for the OS-independent
3134 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3135 debug version of the code includes the debug output trace mechanism and
3136 has a much larger code and data size.
3139 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
3140 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
3142 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
3143 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
3146 2) iASL Compiler/Disassembler and Tools:
3148 iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple
3149 definition blocks within a single ASL file and the resulting AML file.
3150 Support for this type of file was also added to the various tools that
3151 use binary AML files: acpiexec, acpixtract, and the AML disassembler. The
3152 example code below shows two definition blocks within the same file:
3154 DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template",
3158 DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
3162 iASL: Enhanced typechecking for the Name() operator. All expressions for
3163 the value of the named object must be reduced/folded to a single constant
3164 at compile time, as per the ACPI specification (the AML definition of
3167 iASL: Fixed some code indentation issues for the -ic and -ia options (C
3168 and assembly headers). Now all emitted code correctly begins in column 1.
3170 iASL: Added an error message for an attempt to open a Scope() on an
3171 object defined in an SSDT. The DSDT is always loaded into the namespace
3172 first, so any attempt to open a Scope on an SSDT object will fail at
3176 ----------------------------------------
3177 30 September 2015. Summary of changes for version 20150930:
3179 1) ACPICA kernel-resident subsystem:
3181 Debugger: Implemented several changes and bug fixes to assist support for
3182 the in-kernel version of the AML debugger. Lv Zheng.
3183 - Fix the "predefined" command for in-kernel debugger.
3184 - Do not enter debug command loop for the help and version commands.
3185 - Disallow "execute" command during execution/single-step of a method.
3187 Interpreter: Updated runtime typechecking for all operators that have
3188 target operands. The operand is resolved and validated that it is legal.
3189 For example, the target cannot be a non-data object such as a Device,
3190 Mutex, ThermalZone, etc., as per the ACPI specification.
3192 Debugger: Fixed the double-mutex user I/O handshake to work when local
3193 deadlock detection is enabled.
3195 Debugger: limited display of method locals and arguments (LocalX and
3196 ArgX) to only those that have actually been initialized. This prevents
3197 lines of extraneous output.
3199 Updated the definition of the NFIT table to correct the bit polarity of
3200 one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED
3202 Example Code and Data Size: These are the sizes for the OS-independent
3203 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3204 debug version of the code includes the debug output trace mechanism and
3205 has a much larger code and data size.
3208 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
3209 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
3211 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
3212 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
3215 2) iASL Compiler/Disassembler and Tools:
3217 iASL: Improved the compile-time typechecking for operands of many of the
3220 -- Added an option to disable compiler operand/operator typechecking (-
3223 -- For the following operators, the TermArg operands are now validated
3224 when possible to be Integer data objects: BankField, OperationRegion,
3225 DataTableRegion, Buffer, and Package.
3227 -- Store (Source, Target): Both the source and target operands are
3228 resolved and checked that the operands are both legal. For example,
3229 neither operand can be a non-data object such as a Device, Mutex,
3230 ThermalZone, etc. Note, as per the ACPI specification, the CopyObject
3231 operator can be used to store an object to any type of target object.
3233 -- Store (Source, Target): If the source is a Package object, the target
3234 must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target
3235 is a Package, the source must also be a Package.
3237 -- Store (Source, Target): A warning is issued if the source and target
3238 resolve to the identical named object.
3240 -- Store (Source, <method invocation>): An error is generated for the
3241 target method invocation, as this construct is not supported by the AML
3244 -- For all ASL math and logic operators, the target operand must be a
3245 data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This
3246 includes the function return value also.
3248 -- External declarations are also included in the typechecking where
3249 possible. External objects defined using the UnknownObj keyword cannot be
3250 typechecked, however.
3252 iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index
3254 - Legacy code: Index(PKG1, 3)
3255 - New ASL+ code: PKG1[3]
3256 This completes the ACPI 6.0 ASL+ support as it was the only operator not
3259 iASL: Fixed the file suffix for the preprocessor output file (.i). Two
3260 spaces were inadvertently appended to the filename, causing file access
3261 and deletion problems on some systems.
3263 ASL Test Suite (ASLTS): Updated the master makefile to generate all
3264 possible compiler output files when building the test suite -- thus
3265 exercising these features of the compiler. These files are automatically
3266 deleted when the test suite exits.
3269 ----------------------------------------
3270 18 August 2015. Summary of changes for version 20150818:
3272 1) ACPICA kernel-resident subsystem:
3274 Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv
3275 Zheng. ACPICA BZ 1186.
3277 Completed development to ensure that the ACPICA Disassembler and Debugger
3278 are fully standalone components of ACPICA. Removed cross-component
3279 dependences. Lv Zheng.
3281 The max-number-of-AML-loops is now runtime configurable (previously was
3282 compile-time only). This is essentially a loop timeout to force-abort
3283 infinite AML loops. ACPCIA BZ 1192.
3285 Debugger: Cleanup output to dump ACPI names and namepaths without any
3286 trailing underscores. Lv Zheng. ACPICA BZ 1135.
3288 Removed unnecessary conditional compilations across the Debugger and
3289 Disassembler components where entire modules could be left uncompiled.
3291 The aapits test is deprecated and has been removed from the ACPICA git
3292 tree. The test has never been completed and has not been maintained, thus
3293 becoming rather useless. ACPICA BZ 1015, 794.
3295 A batch of small changes to close bugzilla and other reports:
3296 - Remove duplicate code for _PLD processing. ACPICA BZ 1176.
3297 - Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
3298 - iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
3299 - ACPI table support: general cleanup and simplification. Lv Zheng, Bob
3301 - ACPI table support: fix for a buffer read overrun in AcpiTbFindTable.
3303 - Enhance parameter validation for DataTableRegion and LoadTable ASL/AML
3305 - Debugger: Split debugger initialization/termination interfaces. Lv
3307 - AcpiExec: Emit OemTableId for SSDTs during the load phase for table
3309 - AcpiExec: Add debug message during _REG method phase during table
3311 - AcpiNames: Fix a regression where some output was missing and no longer
3313 - Debugger: General cleanup and simplification. Lv Zheng.
3314 - Disassembler: Cleanup use of several global option variables. Lv Zheng.
3316 Example Code and Data Size: These are the sizes for the OS-independent
3317 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3318 debug version of the code includes the debug output trace mechanism and
3319 has a much larger code and data size.
3322 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
3323 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
3325 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
3326 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
3329 2) iASL Compiler/Disassembler and Tools:
3331 AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT
3332 were not handled properly and caused load errors. Now, properly invoke
3333 and use the ACPICA auto-reallocate mechanism for ACPI table data
3334 structures. ACPICA BZ 1188
3336 AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA
3339 AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For
3340 AcpiExec, this means that no control methods (like _REG/_INI/_STA) are
3341 executed during initialization. ACPICA BZ 1187, 1189.
3343 iASL/Disassembler: Implemented a prototype "listing" mode that emits AML
3344 that corresponds to each disassembled ASL statement, to simplify
3345 debugging. ACPICA BZ 1191.
3347 Debugger: Add option to the "objects" command to display a summary of the
3348 current namespace objects (Object type and count). This is displayed if
3349 the command is entered with no arguments.
3351 AcpiNames: Add -x option to specify debug level, similar to AcpiExec.
3354 ----------------------------------------
3355 17 July 2015. Summary of changes for version 20150717:
3357 1) ACPICA kernel-resident subsystem:
3359 Improved the partitioning between the Debugger and Disassembler
3360 components. This allows the Debugger to be used standalone within kernel
3361 code without the Disassembler (which is used for single stepping also).
3362 This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.
3364 Debugger: Implemented a new command to trace the execution of control
3365 methods (Trace). This is especially useful for the in-kernel version of
3366 the debugger when file I/O may not be available for method trace output.
3367 See the ACPICA reference for more information. Lv Zheng.
3369 Moved all C library prototypes (used for the local versions of these
3370 functions when requested) to a new header, acclib.h
3371 Cleaned up the use of non-ANSI C library functions. These functions are
3372 implemented locally in ACPICA. Moved all such functions to a common
3373 source file, utnonansi.c
3375 Debugger: Fixed a problem with the "!!" command (get last command
3376 executed) where the debugger could enter an infinite loop and eventually
3379 Removed the use of local macros that were used for some of the standard C
3380 library functions to automatically cast input parameters. This mostly
3381 affected the is* functions where the input parameter is defined to be an
3382 int. This required a few modifications to the main ACPICA source code to
3383 provide casting for these functions and eliminate possible compiler
3384 warnings for these parameters.
3386 Across the source code, added additional status/error checking to resolve
3387 issues discovered by static source code analysis tools such as Coverity.
3389 Example Code and Data Size: These are the sizes for the OS-independent
3390 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3391 debug version of the code includes the debug output trace mechanism and
3392 has a much larger code and data size.
3395 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
3396 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
3398 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
3399 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
3402 2) iASL Compiler/Disassembler and Tools:
3404 iASL: Fixed a regression where the device map file feature no longer
3405 worked properly when used in conjunction with the disassembler. It only
3406 worked properly with the compiler itself.
3408 iASL: Implemented a new warning for method LocalX variables that are set
3409 but never used (similar to a C compiler such as gcc). This also applies
3410 to ArgX variables that are not defined by the parent method, and are
3411 instead (legally) used as local variables.
3413 iASL/Preprocessor: Finished the pass-through of line numbers from the
3414 preprocessor to the compiler. This ensures that compiler errors/warnings
3415 have the correct original line numbers and filenames, regardless of any
3418 iASL/Preprocessor: Fixed a couple of issues with comment handling and the
3419 pass-through of comments to the preprocessor output file (which becomes
3420 the compiler input file). Also fixed a problem with // comments that
3421 appear after a math expression.
3423 iASL: Added support for the TCPA server table to the table compiler and
3424 template generator. (The client table was already previously supported)
3426 iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to
3427 identify the iASL compiler.
3429 Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined
3430 multiple times. The new names are ACPI_SIGN_NEGATIVE and
3433 AcpiHelp: Update to expand help messages for the iASL preprocessor
3437 ----------------------------------------
3438 19 June 2015. Summary of changes for version 20150619:
3440 Two regressions in version 20150616 have been addressed:
3442 Fixes some problems/issues with the C library macro removal (ACPI_STRLEN,
3443 etc.) This update changes ACPICA to only use the standard headers for
3444 functions, or the prototypes for the local versions of the C library
3445 functions. Across the source code, this required some additional casts
3446 for some Clib invocations for portability. Moved all local prototypes to
3447 a new file, acclib.h
3449 Fixes several problems with recent changes to the handling of the FACS
3450 table that could cause some systems not to boot.
3453 ----------------------------------------
3454 16 June 2015. Summary of changes for version 20150616:
3457 1) ACPICA kernel-resident subsystem:
3459 Across the entire ACPICA source code base, the various macros for the C
3460 library functions (such as ACPI_STRLEN, etc.) have been removed and
3461 replaced by the standard C library names (strlen, etc.) The original
3462 purpose for these macros is no longer applicable. This simplification
3463 reduces the number of macros used in the ACPICA source code
3464 significantly, improving readability and maintainability.
3466 Implemented support for a new ACPI table, the OSDT. This table, the
3467 "override" SDT, can be loaded directly by the host OS at boot time. It
3468 enables the replacement of existing namespace objects that were installed
3469 via the DSDT and/or SSDTs. The primary purpose for this is to replace
3470 buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated
3471 for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob
3474 Added support for systems with (improperly) two FACS tables -- a "32-bit"
3475 table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit
3476 X field). This change will support both automatically. There continues to
3477 be systems found with this issue. This support requires a change to the
3478 AcpiSetFirmwareWakingVector interface. Also, a public global variable has
3479 been added to allow the host to select which FACS is desired
3480 (AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more
3483 Added a new feature to allow for systems that do not contain an FACS.
3484 Although this is already supported on hardware-reduced platforms, the
3485 feature has been extended for all platforms. The reasoning is that we do
3486 not want to abort the entire ACPICA initialization just because the
3487 system is seriously buggy and has no FACS.
3489 Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were
3490 not correctly transcribed from the ACPI specification in ACPICA version
3493 Implemented support for the _CLS object in the AcpiGetObjectInfo external
3496 Updated the definitions of the TCPA and TPM2 ACPI tables to the more
3497 recent TCG ACPI Specification, December 14, 2014. Table disassembler and
3498 compiler also updated. Note: The TCPA "server" table is not supported by
3499 the disassembler/table-compiler at this time.
3501 ACPI 6.0: Added definitions for the new GIC version field in the MADT.
3503 Example Code and Data Size: These are the sizes for the OS-independent
3504 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3505 debug version of the code includes the debug output trace mechanism and
3506 has a much larger code and data size.
3509 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
3510 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
3512 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
3513 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
3516 2) iASL Compiler/Disassembler and Tools:
3518 Disassembler: Fixed a problem with the new symbolic operator disassembler
3519 where incorrect ASL code could be emitted in some cases for the "non-
3520 commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and
3521 ShiftRight. The actual problem cases seem to be rather unusual in common
3522 ASL code, however. David Box.
3524 Modified the linux version of acpidump to obtain ACPI tables from not
3525 just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv
3528 iASL: Fixed a problem where the user preprocessor output file (.i)
3529 contained extra data that was not expected. The compiler was using this
3530 file as a temporary file and passed through #line directives in order to
3531 keep compiler error messages in sync with the input file and line number
3532 across multiple include files. The (.i) is no longer a temporary file as
3533 the compiler uses a new, different file for the original purpose.
3535 iASL: Fixed a problem where comments within the original ASL source code
3536 file were not passed through to the preprocessor output file, nor any
3539 iASL: Fixed some issues for the handling of the "#include" preprocessor
3540 directive and the similar (but not the same) "Include" ASL operator.
3542 iASL: Add support for the new OSDT in both the disassembler and compiler.
3544 iASL: Fixed a problem with the constant folding support where a Buffer
3545 object could be incorrectly generated (incorrectly formed) during a
3546 conversion to a Store() operator.
3548 AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new
3549 description text for the _REV predefined name. _REV now permanently
3550 returns 2, as per the ACPI 6.0 specification.
3552 Debugger: Enhanced the output of the Debug ASL object for references
3553 produced by the Index operator. For Buffers and strings, only output the
3554 actual byte pointed to by the index. For packages, only print the single
3555 package element decoded by the index. Previously, the entire
3556 buffer/string/package was emitted.
3558 iASL/Table-compiler: Fixed a regression where the "generic" data types
3559 were no longer recognized, causing errors.
3562 ----------------------------------------
3563 15 May 2015. Summary of changes for version 20150515:
3565 This release implements most of ACPI 6.0 as described below.
3567 1) ACPICA kernel-resident subsystem:
3569 Implemented runtime argument checking and return value checking for all
3570 new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI,
3571 _MTL, _PRR, _RDI, _RST, _TFP, _TSN.
3573 Example Code and Data Size: These are the sizes for the OS-independent
3574 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3575 debug version of the code includes the debug output trace mechanism and
3576 has a much larger code and data size.
3579 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
3580 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
3582 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
3583 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
3586 2) iASL Compiler/Disassembler and Tools:
3588 iASL compiler: Added compile-time support for all new ACPI 6.0 predefined
3589 names (argument count validation and return value typechecking.)
3591 iASL disassembler and table compiler: implemented support for all new
3592 ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV.
3594 iASL disassembler and table compiler: Added ACPI 6.0 changes to existing
3597 iASL preprocessor: Added a new directive to enable inclusion of binary
3598 blobs into ASL code. The new directive is #includebuffer. It takes a
3599 binary file as input and emits a named ascii buffer object into the ASL
3602 AcpiHelp: Added support for all new ACPI 6.0 predefined names.
3604 AcpiHelp: Added a new option, -d, to display all iASL preprocessor
3607 AcpiHelp: Added a new option, -t, to display all known/supported ACPI
3611 ----------------------------------------
3612 10 April 2015. Summary of changes for version 20150410:
3614 Reverted a change introduced in version 20150408 that caused
3615 a regression in the disassembler where incorrect operator
3616 symbols could be emitted.
3619 ----------------------------------------
3620 08 April 2015. Summary of changes for version 20150408:
3623 1) ACPICA kernel-resident subsystem:
3625 Permanently set the return value for the _REV predefined name. It now
3626 returns 2 (was 5). This matches other ACPI implementations. _REV will be
3627 deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2
3628 for ACPI 2.0 and later. It should never be used to differentiate or
3629 identify operating systems.
3631 Added the "Windows 2015" string to the _OSI support. ACPICA will now
3632 return TRUE to a query with this string.
3634 Fixed several issues with the local version of the printf function.
3636 Added the C99 compiler option (-std=c99) to the Unix makefiles.
3639 Non-Debug Version: 99.9K Code, 27.4K Data, 127.3K Total
3640 Debug Version: 195.2K Code, 80.7K Data, 275.9K Total
3642 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
3643 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
3646 2) iASL Compiler/Disassembler and Tools:
3648 iASL: Implemented an enhancement to the constant folding feature to
3649 transform the parse tree to a simple Store operation whenever possible:
3650 Add (2, 3, X) ==> is converted to: Store (5, X)
3651 X = 2 + 3 ==> is converted to: Store (5, X)
3653 Updated support for the SLIC table (Software Licensing Description Table)
3654 in both the Data Table compiler and the disassembler. The SLIC table
3655 support now conforms to "Microsoft Software Licensing Tables (SLIC and
3656 MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data
3657 following the ACPI header is now defined to be "Proprietary Data", and as
3658 such, can only be entered or displayed as a hex data block.
3660 Implemented full support for the MSDM table as described in the document
3661 above. Note: The format of MSDM is similar to SLIC. Any MSDM data
3662 following the ACPI header is defined to be "Proprietary Data", and can
3663 only be entered or displayed as a hex data block.
3665 Implemented the -Pn option for the iASL Table Compiler (was only
3666 implemented for the ASL compiler). This option disables the iASL
3669 Disassembler: For disassembly of Data Tables, added a comment field
3670 around the Ascii equivalent data that is emitted as part of the "Raw
3671 Table Data" block. This prevents the iASL Preprocessor from possible
3672 confusion if/when the table is compiled.
3674 Disassembler: Added an option (-df) to force the disassembler to assume
3675 that the table being disassembled contains valid AML. This feature is
3676 useful for disassembling AML files that contain ACPI signatures other
3677 than DSDT or SSDT (such as OEMx or other signatures).
3679 Changes for the EFI version of the tools:
3680 1) Fixed a build error/issue
3681 2) Fixed a cast warning
3683 iASL: Fixed a path issue with the __FILE__ operator by making the
3684 directory prefix optional within the internal SplitInputFilename
3687 Debugger: Removed some unused global variables.
3689 Tests: Updated the makefile for proper generation of the AAPITS suite.
3692 ----------------------------------------
3693 04 February 2015. Summary of changes for version 20150204:
3695 ACPICA kernel-resident subsystem:
3697 Updated all ACPICA copyrights and signons to 2014. Added the 2014
3698 copyright to all module headers and signons, including the standard Linux
3699 header. This affects virtually every file in the ACPICA core subsystem,
3700 iASL compiler, all ACPICA utilities, and the test suites.
3702 Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
3703 A raw gpe handling mechanism was created to allow better handling of GPE
3704 storms that aren't easily managed by the normal handler. The raw handler
3705 allows disabling/renabling of the the GPE so that interrupt storms can be
3706 avoided in cases where events cannot be timely serviced. In this
3707 scenario, handlers should use the AcpiSetGpe() API to disable/enable the
3708 GPE. This API will leave the reference counts undisturbed, thereby
3709 preventing unintentional clearing of the GPE when the intent in only to
3710 temporarily disable it. Raw handlers allow enabling and disabling of a
3711 GPE by removing GPE register locking. As such, raw handlers much provide
3712 their own locks while using GPE API's to protect access to GPE data
3716 Events: Always modify GPE registers under the GPE lock.
3717 Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
3718 values. Reported as bug by joe.liu@apple.com.
3720 Unix makefiles: Separate option to disable optimizations and
3721 _FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the
3722 NOOPT disable option and creates a separate flag (NOFORTIFY) for this
3723 purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined
3724 errors when building ACPICA. This allows disabling the option without
3725 also having to disable optimazations.
3729 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
3730 Debug Version: 199.2K Code, 82.4K Data, 281.6K Total
3733 --------------------------------------
3734 07 November 2014. Summary of changes for version 20141107:
3736 This release is available at https://acpica.org/downloads
3738 This release introduces and implements language extensions to ASL that
3739 provide support for symbolic ("C-style") operators and expressions. These
3740 language extensions are known collectively as ASL+.
3743 1) iASL Compiler/Disassembler and Tools:
3745 Disassembler: Fixed a problem with disassembly of the UartSerialBus
3746 macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E.
3749 Disassembler: Fixed the Unicode macro support to add escape sequences.
3750 All non-printable ASCII values are emitted as escape sequences, as well
3751 as the standard escapes for quote and backslash. Ensures that the
3752 disassembled macro can be correctly recompiled.
3754 iASL: Added Printf/Fprintf macros for formatted output. These macros are
3755 translated to existing AML Concatenate and Store operations. Printf
3756 writes to the ASL Debug object. Fprintf allows the specification of an
3757 ASL name as the target. Only a single format specifier is required, %o,
3758 since the AML interpreter dynamically converts objects to the required
3761 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
3762 (Concatenate (Concatenate (Concatenate ("", Arg0),
3763 ": Unexpected value for "), Arg1), ", "), Arg2),
3764 " at line "), Arg3), Debug)
3766 (new) Printf ("%o: Unexpected value for %o, %o at line %o",
3767 Arg0, Arg1, Arg2, Arg3)
3769 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
3770 ("", Arg1), ": "), Arg0), " Successful"), STR1)
3772 (new) Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)
3774 iASL: Added debug options (-bp, -bt) to dynamically prune levels of the
3775 ASL parse tree before the AML code is generated. This allows blocks of
3776 ASL code to be removed in order to help locate and identify problem
3777 devices and/or code. David E. Box.
3779 AcpiExec: Added support (-fi) for an optional namespace object
3780 initialization file. This file specifies initial values for namespace
3781 objects as necessary for debugging and testing different ASL code paths
3782 that may be taken as a result of BIOS options.
3785 2) Overview of symbolic operator support for ASL (ASL+)
3786 -------------------------------------------------------
3788 As an extension to the ASL language, iASL implements support for symbolic
3789 (C-style) operators for math and logical expressions. This can greatly
3790 simplify ASL code as well as improve both readability and
3791 maintainability. These language extensions can exist concurrently with
3792 all legacy ASL code and expressions.
3794 The symbolic extensions are 100% compatible with existing AML
3795 interpreters, since no new AML opcodes are created. To implement the
3796 extensions, the iASL compiler transforms the symbolic expressions into
3797 the legacy ASL/AML equivalents at compile time.
3799 Full symbolic expressions are supported, along with the standard C
3800 precedence and associativity rules.
3802 Full disassembler support for the symbolic expressions is provided, and
3803 creates an automatic migration path for existing ASL code to ASL+ code
3804 via the disassembly process. By default, the disassembler now emits ASL+
3805 code with symbolic expressions. An option (-dl) is provided to force the
3806 disassembler to emit legacy ASL code if desired.
3808 Below is the complete list of the currently supported symbolic operators
3809 with examples. See the iASL User Guide for additional information.
3812 ASL+ Syntax Legacy ASL Equivalent
3813 ----------- ---------------------
3817 Z = X + Y Add (X, Y, Z)
3818 Z = X - Y Subtract (X, Y, Z)
3819 Z = X * Y Multiply (X, Y, Z)
3820 Z = X / Y Divide (X, Y, , Z)
3821 Z = X % Y Mod (X, Y, Z)
3822 Z = X << Y ShiftLeft (X, Y, Z)
3823 Z = X >> Y ShiftRight (X, Y, Z)
3824 Z = X & Y And (X, Y, Z)
3825 Z = X | Y Or (X, Y, Z)
3826 Z = X ^ Y Xor (X, Y, Z)
3831 // Logical operators
3833 (X == Y) LEqual (X, Y)
3834 (X != Y) LNotEqual (X, Y)
3835 (X < Y) LLess (X, Y)
3836 (X > Y) LGreater (X, Y)
3837 (X <= Y) LLessEqual (X, Y)
3838 (X >= Y) LGreaterEqual (X, Y)
3839 (X && Y) LAnd (X, Y)
3843 // Assignment and compound assignment operations
3846 X += Y Add (X, Y, X)
3847 X -= Y Subtract (X, Y, X)
3848 X *= Y Multiply (X, Y, X)
3849 X /= Y Divide (X, Y, , X)
3850 X %= Y Mod (X, Y, X)
3851 X <<= Y ShiftLeft (X, Y, X)
3852 X >>= Y ShiftRight (X, Y, X)
3853 X &= Y And (X, Y, X)
3855 X ^= Y Xor (X, Y, X)
3862 If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
3863 And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530,
3865 0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
3867 And (MEMB, 0xFFFFFFF0, SRMB)
3868 Store (MEMB, Local2)
3869 Store (PDBM, Local1)
3870 And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
3872 Or (PDBM, 0x02, PDBM)
3876 If (((R510 & 0x03FB) == 0x02E0) ||
3877 ((R520 & 0x03FB) == 0x02E0) ||
3878 ((R530 & 0x03FB) == 0x02E0) ||
3879 ((R540 & 0x03FB) == 0x02E0))
3881 SRMB = (MEMB & 0xFFFFFFF0)
3884 PDBM &= 0xFFFFFFFFFFFFFFF9
3890 Store (0x1234, Local1)
3891 Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
3892 Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
3893 Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
3894 Store (Index (PKG1, 0x03), Local6)
3895 Store (Add (Local3, Local2), Debug)
3896 Add (Local1, 0x0F, Local2)
3897 Add (Local1, Multiply (Local2, Local3), Local2)
3898 Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)
3902 Local3 = (((Local1 + TEST) + 0x20) * Local2)
3903 Local3 = (Local2 * ((Local1 + TEST) + 0x20))
3904 Local3 = (Local1 + (TEST + (0x20 * Local2)))
3905 Local6 = Index (PKG1, 0x03)
3906 Debug = (Local3 + Local2)
3907 Local2 = (Local1 + 0x0F)
3908 Local2 = (Local1 + (Local2 * Local3))
3909 Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))
3912 ----------------------------------------
3913 26 September 2014. Summary of changes for version 20140926:
3915 1) ACPICA kernel-resident subsystem:
3917 Updated the GPIO operation region handler interface (GeneralPurposeIo).
3918 In order to support GPIO Connection objects with multiple pins, along
3919 with the related Field objects, the following changes to the interface
3920 have been made: The Address is now defined to be the offset in bits of
3921 the field unit from the previous invocation of a Connection. It can be
3922 viewed as a "Pin Number Index" into the connection resource descriptor.
3923 The BitWidth is the exact bit width of the field. It is usually one bit,
3924 but not always. See the ACPICA reference guide (section 8.8.6.2.1) for
3925 additional information and examples.
3927 GPE support: During ACPICA/GPE initialization, ensure that all GPEs with
3928 corresponding _Lxx/_Exx methods are disabled (they may have been enabled
3929 by the firmware), so that they cannot fire until they are enabled via
3930 AcpiUpdateAllGpes. Rafael J. Wysocki.
3932 Added a new return flag for the Event/GPE status interfaces --
3933 AcpiGetEventStatus and AcpiGetGpeStatus. The new
3934 ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or
3935 GPE currently has a handler associated with it, and can thus actually
3936 affect the system. Lv Zheng.
3938 Example Code and Data Size: These are the sizes for the OS-independent
3939 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3940 debug version of the code includes the debug output trace mechanism and
3941 has a much larger code and data size.
3944 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
3945 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
3947 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
3948 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
3950 2) iASL Compiler/Disassembler and Tools:
3952 iASL: Fixed a memory allocation/free regression introduced in 20140828
3953 that could cause the compiler to crash. This was introduced inadvertently
3954 during the effort to eliminate compiler memory leaks. ACPICA BZ 1111,
3957 iASL: Removed two error messages that have been found to create false
3958 positives, until they can be fixed and fully validated (ACPICA BZ 1112):
3959 1) Illegal forward reference within a method
3960 2) Illegal reference across two methods
3962 iASL: Implemented a new option (-lm) to create a hardware mapping file
3963 that summarizes all GPIO, I2C, SPI, and UART connections. This option
3964 works for both the compiler and disassembler. See the iASL compiler user
3965 guide for additional information and examples (section 6.4.6).
3967 AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to
3968 version 2. This corrects the AE_BAD_HEADER exception seen on systems with
3969 a version 1 RSDP. Lv Zheng ACPICA BZ 1097.
3971 AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode
3972 unless STDIN is actually a terminal. Assists with batch-mode processing.
3975 Disassembler/AcpiHelp: Added another large group of recognized _HID
3979 ----------------------------------------
3980 28 August 2014. Summary of changes for version 20140828:
3982 1) ACPICA kernel-resident subsystem:
3984 Fixed a problem related to the internal use of the Timer() operator where
3985 a 64-bit divide could cause an attempted link to a double-precision math
3986 library. This divide is not actually necessary, so the code was
3987 restructured to eliminate it. Lv Zheng.
3989 ACPI 5.1: Added support for the runtime validation of the _DSD package
3990 (similar to the iASL support).
3992 ACPI 5.1/Headers: Added support for the GICC affinity subtable to the
3993 SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.
3995 Example Code and Data Size: These are the sizes for the OS-independent
3996 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3997 debug version of the code includes the debug output trace mechanism and
3998 has a much larger code and data size.
4001 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
4002 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
4004 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total1
4005 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
4007 2) iASL Compiler/Disassembler and Tools:
4009 AcpiExec: Fixed a problem on unix systems where the original terminal
4010 state was not always properly restored upon exit. Seen when using the -v
4011 option. ACPICA BZ 1104.
4013 iASL: Fixed a problem with the validation of the ranges/length within the
4014 Memory24 resource descriptor. There was a boundary condition when the
4015 range was equal to the (length -1) caused by the fact that these values
4016 are defined in 256-byte blocks, not bytes. ACPICA BZ 1098
4018 Disassembler: Fixed a problem with the GpioInt descriptor interrupt
4020 flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword
4022 now supported properly.
4024 ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported
4025 in the disassembler, data table compiler, and table template generator.
4027 iASL: Added a requirement for Device() objects that one of either a _HID
4028 or _ADR must exist within the scope of a Device, as per the ACPI
4029 specification. Remove a similar requirement that was incorrectly in place
4030 for the _DSD object.
4032 iASL: Added error detection for illegal named references within control
4033 methods that would cause runtime failures. Now trapped as errors are: 1)
4034 References to objects within a non-parent control method. 2) Forward
4035 references (within a method) -- for control methods, AML interpreters use
4036 a one-pass parse of control methods. ACPICA BZ 1008.
4038 iASL: Added error checking for dependencies related to the _PSx power
4039 methods. ACPICA BZ 1029.
4040 1) For _PS0, one of these must exist within the same scope: _PS1, _PS2,
4042 2) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same
4045 iASL and table compiler: Cleanup miscellaneous memory leaks by fully
4046 deploying the existing object and string caches and adding new caches for
4049 iASL: Split the huge parser source file into multiple subfiles to improve
4050 manageability. Generation now requires the M4 macro preprocessor, which
4051 is part of the Bison distribution on both unix and windows platforms.
4053 AcpiSrc: Fixed and removed all extraneous warnings generated during
4054 entire ACPICA source code scan and/or conversion.
4057 ----------------------------------------
4059 24 July 2014. Summary of changes for version 20140724:
4061 The ACPI 5.1 specification has been released and is available at:
4062 http://uefi.org/specs/access
4065 0) ACPI 5.1 support in ACPICA:
4067 ACPI 5.1 is fully supported in ACPICA as of this release.
4069 New predefined names. Support includes iASL and runtime ACPICA
4071 _CCA (Cache Coherency Attribute).
4072 _DSD (Device-Specific Data). David Box.
4074 Modifications to existing ACPI tables. Support includes headers, iASL
4075 Data Table compiler, disassembler, and the template generator.
4076 FADT - New fields and flags. Graeme Gregory.
4077 GTDT - One new subtable and new fields. Tomasz Nowicki.
4078 MADT - Two new subtables. Tomasz Nowicki.
4079 PCCT - One new subtable.
4082 New notification type for System Resource Affinity change events.
4085 1) ACPICA kernel-resident subsystem:
4087 Fixed a regression introduced in 20140627 where a fault can happen during
4088 the deletion of Alias AML namespace objects. The problem affected both
4089 the core ACPICA and the ACPICA tools including iASL and AcpiExec.
4091 Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a
4092 simple mechanism to enable wake GPEs that have no associated handler or
4093 control method. Rafael Wysocki.
4095 Updated the AcpiEnableGpe interface to disallow the enable if there is no
4096 handler or control method associated with the particular GPE. This will
4097 help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
4099 Updated GPE handling and dispatch by disabling the GPE before clearing
4100 the status bit for edge-triggered GPEs. Lv Zheng.
4102 Added Timer() support to the AML Debug object. The current timer value is
4103 now displayed with each invocation of (Store to) the debug object to
4104 enable simple generation of execution times for AML code (method
4105 execution for example.) ACPICA BZ 1093.
4107 Example Code and Data Size: These are the sizes for the OS-independent
4108 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4109 debug version of the code includes the debug output trace mechanism and
4110 has a much larger code and data size.
4113 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total
4114 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
4116 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
4117 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
4120 2) iASL Compiler/Disassembler and Tools:
4122 Fixed an issue with the recently added local printf implementation,
4123 concerning width/precision specifiers that could cause incorrect output.
4124 Lv Zheng. ACPICA BZ 1094.
4126 Disassembler: Added support to detect buffers that contain UUIDs and
4127 disassemble them to an invocation of the ToUUID operator. Also emit
4128 commented descriptions of known ACPI-related UUIDs.
4130 AcpiHelp: Added support to display known ACPI-related UUIDs. New option,
4131 -u. Adds three new files.
4133 iASL: Update table compiler and disassembler for DMAR table changes that
4134 were introduced in September 2013. With assistance by David Woodhouse.
4136 ----------------------------------------
4137 27 June 2014. Summary of changes for version 20140627:
4139 1) ACPICA kernel-resident subsystem:
4141 Formatted Output: Implemented local versions of standard formatted output
4142 utilities such as printf, etc. Over time, it has been discovered that
4143 there are in fact many portability issues with printf, and the addition
4144 of this feature will fix/prevent these issues once and for all. Some
4145 known issues are summarized below:
4147 1) Output of 64-bit values is not portable. For example, UINT64 is %ull
4148 for the Linux kernel and is %uI64 for some MSVC versions.
4149 2) Invoking printf consistently in a manner that is portable across both
4150 32-bit and 64-bit platforms is difficult at best in many situations.
4151 3) The output format for pointers varies from system to system (leading
4152 zeros especially), and leads to inconsistent output from ACPICA across
4154 4) Certain platform-specific printf formats may conflict with ACPICA use.
4155 5) If there is no local C library available, ACPICA now has local support
4158 -- To address these printf issues in a complete manner, ACPICA now
4159 directly implements a small subset of printf format specifiers, only
4160 those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
4162 Implemented support for ACPICA generation within the EFI environment.
4163 Initially, the AcpiDump utility is supported in the UEFI shell
4164 environment. Lv Zheng.
4166 Added a new external interface, AcpiLogError, to improve ACPICA
4167 portability. This allows the host to redirect error messages from the
4168 ACPICA utilities. Lv Zheng.
4170 Added and deployed new OSL file I/O interfaces to improve ACPICA
4178 There are C library implementations of these functions in the new file
4179 service_layers/oslibcfs.c -- however, the functions can be implemented by
4180 the local host in any way necessary. Lv Zheng.
4182 Implemented a mechanism to disable/enable ACPI table checksum validation
4183 at runtime. This can be useful when loading tables very early during OS
4184 initialization when it may not be possible to map the entire table in
4185 order to compute the checksum. Lv Zheng.
4187 Fixed a buffer allocation issue for the Generic Serial Bus support.
4188 Originally, a fixed buffer length was used. This change allows for
4189 variable-length buffers based upon the protocol indicated by the field
4190 access attributes. Reported by Lan Tianyu. Lv Zheng.
4192 Fixed a problem where an object detached from a namespace node was not
4193 properly terminated/cleared and could cause a circular list problem if
4194 reattached. ACPICA BZ 1063. David Box.
4196 Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
4198 Fixed a possible memory leak in an error return path within the function
4199 AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
4201 Example Code and Data Size: These are the sizes for the OS-independent
4202 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4203 debug version of the code includes the debug output trace mechanism and
4204 has a much larger code and data size.
4207 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
4208 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
4210 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
4211 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
4214 2) iASL Compiler/Disassembler and Tools:
4216 Disassembler: Add dump of ASCII equivalent text within a comment at the
4217 end of each line of the output for the Buffer() ASL operator.
4219 AcpiDump: Miscellaneous changes:
4220 Fixed repetitive table dump in -n mode.
4221 For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
4222 the ACPI 2.0 GUID fails.
4224 iASL: Fixed a problem where the compiler could fault if incorrectly given
4225 an acpidump output file as input. ACPICA BZ 1088. David Box.
4227 AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
4228 they are invoked without any arguments.
4230 Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
4231 1086. Colin Ian King.
4233 Disassembler: Cleaned up a block of code that extracts a parent Op
4234 object. Added a comment that explains that the parent is guaranteed to be
4235 valid in this case. ACPICA BZ 1069.
4238 ----------------------------------------
4239 24 April 2014. Summary of changes for version 20140424:
4241 1) ACPICA kernel-resident subsystem:
4243 Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
4244 Some of these tables are known to contain a trailing NULL entry. Lv
4247 Removed an extraneous error message for the case where there are a large
4248 number of system GPEs (> 124). This was the "32-bit FADT register is too
4249 long to convert to GAS struct" message, which is irrelevant for GPEs
4250 since the GPEx_BLK_LEN fields of the FADT are always used instead of the
4251 (limited capacity) GAS bit length. Also, several changes to ensure proper
4252 support for GPE numbers > 255, where some "GPE number" fields were 8-bits
4255 Implemented and deployed additional configuration support for the public
4256 ACPICA external interfaces. Entire classes of interfaces can now be
4257 easily modified or configured out, replaced by stubbed inline functions
4258 by default. Lv Zheng.
4260 Moved all public ACPICA runtime configuration globals to the public
4261 ACPICA external interface file for convenience. Also, removed some
4262 obsolete/unused globals. See the file acpixf.h. Lv Zheng.
4264 Documentation: Added a new section to the ACPICA reference describing the
4265 maximum number of GPEs that can be supported by the FADT-defined GPEs in
4266 block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
4269 Example Code and Data Size: These are the sizes for the OS-independent
4270 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4271 debug version of the code includes the debug output trace mechanism and
4272 has a much larger code and data size.
4275 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
4276 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
4278 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
4279 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
4282 2) iASL Compiler/Disassembler and Tools:
4284 iASL and disassembler: Add full support for the LPIT table (Low Power
4285 Idle Table). Includes support in the disassembler, data table compiler,
4286 and template generator.
4289 1) Add option to force the use of the RSDT (over the XSDT).
4290 2) Improve validation of the RSDP signature (use 8 chars instead of 4).
4292 iASL: Add check for predefined packages that are too large. For
4293 predefined names that contain subpackages, check if each subpackage is
4294 too large. (Check for too small already exists.)
4296 Debugger: Updated the GPE command (which simulates a GPE by executing the
4297 GPE code paths in ACPICA). The GPE device is now optional, and defaults
4298 to the GPE 0/1 FADT-defined blocks.
4300 Unix application OSL: Update line-editing support. Add additional error
4301 checking and take care not to reset terminal attributes on exit if they
4302 were never set. This should help guarantee that the terminal is always
4303 left in the previous state on program exit.
4306 ----------------------------------------
4307 25 March 2014. Summary of changes for version 20140325:
4309 1) ACPICA kernel-resident subsystem:
4311 Updated the auto-serialize feature for control methods. This feature
4312 automatically serializes all methods that create named objects in order
4313 to prevent runtime errors. The update adds support to ignore the
4314 currently executing AML SyncLevel when invoking such a method, in order
4315 to prevent disruption of any existing SyncLevel priorities that may exist
4316 in the AML code. Although the use of SyncLevels is relatively rare, this
4317 change fixes a regression where an AE_AML_MUTEX_ORDER exception can
4318 appear on some machines starting with the 20140214 release.
4320 Added a new external interface to allow the host to install ACPI tables
4321 very early, before the namespace is even created. AcpiInstallTable gives
4322 the host additional flexibility for ACPI table management. Tables can be
4323 installed directly by the host as if they had originally appeared in the
4324 XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
4325 (anything except the DSDT and FACS). Adds a new file, tbdata.c, along
4326 with additional internal restructuring and cleanup. See the ACPICA
4327 Reference for interface details. Lv Zheng.
4329 Added validation of the checksum for all incoming dynamically loaded
4330 tables (via external interfaces or via AML Load/LoadTable operators). Lv
4333 Updated the use of the AcpiOsWaitEventsComplete interface during Notify
4334 and GPE handler removal. Restructured calls to eliminate possible race
4335 conditions. Lv Zheng.
4337 Added a warning for the use/execution of the ASL/AML Unload (table)
4338 operator. This will help detect and identify machines that use this
4339 operator if and when it is ever used. This operator has never been seen
4340 in the field and the usage model and possible side-effects of the drastic
4341 runtime action of a full table removal are unknown.
4343 Reverted the use of #pragma push/pop which was introduced in the 20140214
4344 release. It appears that push and pop are not implemented by enough
4345 compilers to make the use of this feature feasible for ACPICA at this
4346 time. However, these operators may be deployed in a future ACPICA
4349 Added the missing EXPORT_SYMBOL macros for the install and remove SCI
4352 Source code generation:
4353 1) Disabled the use of the "strchr" macro for the gcc-specific
4354 generation. For some versions of gcc, this macro can periodically expose
4355 a compiler bug which in turn causes compile-time error(s).
4356 2) Added support for PPC64 compilation. Colin Ian King.
4358 Example Code and Data Size: These are the sizes for the OS-independent
4359 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4360 debug version of the code includes the debug output trace mechanism and
4361 has a much larger code and data size.
4364 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
4365 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
4367 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
4368 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
4371 2) iASL Compiler/Disassembler and Tools:
4373 Disassembler: Added several new features to improve the readability of
4374 the resulting ASL code. Extra information is emitted within comment
4375 fields in the ASL code:
4376 1) Known _HID/_CID values are decoded to descriptive text.
4377 2) Standard values for the Notify() operator are decoded to descriptive
4379 3) Target operands are expanded to full pathnames (in a comment) when
4382 Disassembler: Miscellaneous updates for extern() handling:
4383 1) Abort compiler if file specified by -fe option does not exist.
4384 2) Silence unnecessary warnings about argument count mismatches.
4385 3) Update warning messages concerning unresolved method externals.
4386 4) Emit "UnknownObj" keyword for externals whose type cannot be
4390 1) Added the -a option to display both the ASL syntax and the AML
4391 encoding for an input ASL operator. This effectively displays all known
4392 information about an ASL operator with one AcpiHelp invocation.
4393 2) Added substring match support (similar to a wildcard) for the -i
4394 (_HID/PNP IDs) option.
4396 iASL/Disassembler: Since this tool does not yet support execution on big-
4397 endian machines, added detection of endianness and an error message if
4398 execution is attempted on big-endian. Support for big-endian within iASL
4399 is a feature that is on the ACPICA to-be-done list.
4402 1) Remove option to extract binary files from an acpidump; this function
4403 is made obsolete by the AcpiXtract utility.
4404 2) General cleanup of open files and allocated buffers.
4407 ----------------------------------------
4408 14 February 2014. Summary of changes for version 20140214:
4410 1) ACPICA kernel-resident subsystem:
4412 Implemented a new mechanism to proactively prevent problems with ill-
4413 behaved reentrant control methods that create named ACPI objects. This
4414 behavior is illegal as per the ACPI specification, but is nonetheless
4415 frequently seen in the field. Previously, this could lead to an
4416 AE_ALREADY_EXISTS exception if the method was actually entered by more
4417 than one thread. This new mechanism detects such methods at table load
4418 time and marks them "serialized" to prevent reentrancy. A new global
4419 option, AcpiGbl_AutoSerializeMethods, has been added to disable this
4420 feature if desired. This mechanism and global option obsoletes and
4421 supersedes the previous AcpiGbl_SerializeAllMethods option.
4423 Added the "Windows 2013" string to the _OSI support. ACPICA will now
4424 respond TRUE to _OSI queries with this string. It is the stated policy of
4425 ACPICA to add new strings to the _OSI support as soon as possible after
4426 they are defined. See the full ACPICA _OSI policy which has been added to
4427 the utilities/utosi.c file.
4429 Hardened/updated the _PRT return value auto-repair code:
4430 1) Do not abort the repair on a single subpackage failure, continue to
4431 check all subpackages.
4432 2) Add check for the minimum subpackage length (4).
4433 3) Properly handle extraneous NULL package elements.
4435 Added support to avoid the possibility of infinite loops when traversing
4436 object linked lists. Never allow an infinite loop, even in the face of
4437 corrupted object lists.
4439 ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
4440 pack(pop) directives to ensure that the ACPICA headers are independent of
4441 compiler settings or other host headers.
4443 Example Code and Data Size: These are the sizes for the OS-independent
4444 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4445 debug version of the code includes the debug output trace mechanism and
4446 has a much larger code and data size.
4449 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
4450 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
4452 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
4453 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
4456 2) iASL Compiler/Disassembler and Tools:
4458 iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
4459 first reserved field was incorrectly forced to have a value of zero. This
4460 change correctly forces the field to have a value of one. ACPICA BZ 1081.
4462 Debugger: Added missing support for the "Extra" and "Data" subobjects
4463 when displaying object data.
4465 Debugger: Added support to display entire object linked lists when
4466 displaying object data.
4468 iASL: Removed the obsolete -g option to obtain ACPI tables from the
4469 Windows registry. This feature has been superseded by the acpidump
4473 ----------------------------------------
4474 14 January 2014. Summary of changes for version 20140114:
4476 1) ACPICA kernel-resident subsystem:
4478 Updated all ACPICA copyrights and signons to 2014. Added the 2014
4479 copyright to all module headers and signons, including the standard Linux
4480 header. This affects virtually every file in the ACPICA core subsystem,
4481 iASL compiler, all ACPICA utilities, and the test suites.
4483 Improved parameter validation for AcpiInstallGpeBlock. Added the
4485 1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
4486 2) There is not already a GPE block attached to the device.
4487 Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
4490 Correctly support "references" in the ACPI_OBJECT. This change fixes the
4491 support to allow references (namespace nodes) to be passed as arguments
4492 to control methods via the evaluate object interface. This is probably
4493 most useful for testing purposes, however.
4495 Improved support for 32/64 bit physical addresses in printf()-like
4496 output. This change improves the support for physical addresses in printf
4497 debug statements and other output on both 32-bit and 64-bit hosts. It
4498 consistently outputs the appropriate number of bytes for each host. The
4499 %p specifier is unsatisfactory since it does not emit uniform output on
4500 all hosts/clib implementations (on some, leading zeros are not supported,
4501 leading to difficult-to-read output).
4503 Example Code and Data Size: These are the sizes for the OS-independent
4504 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4505 debug version of the code includes the debug output trace mechanism and
4506 has a much larger code and data size.
4509 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
4510 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
4512 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
4513 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
4516 2) iASL Compiler/Disassembler and Tools:
4518 iASL: Fix a possible fault when using the Connection() operator. Fixes a
4519 problem if the parent Field definition for the Connection operator refers
4520 to an operation region that does not exist. ACPICA BZ 1064.
4522 AcpiExec: Load of local test tables is now optional. The utility has the
4523 capability to load some various tables to test features of ACPICA.
4524 However, there are enough of them that the output of the utility became
4525 confusing. With this change, only the required local tables are displayed
4526 (RSDP, XSDT, etc.) along with the actual tables loaded via the command
4527 line specification. This makes the default output simler and easier to
4528 understand. The -el command line option restores the original behavior
4529 for testing purposes.
4531 AcpiExec: Added support for overlapping operation regions. This change
4532 expands the simulation of operation regions by supporting regions that
4533 overlap within the given address space. Supports SystemMemory and
4534 SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
4536 AcpiExec: Added region handler support for PCI_Config and EC spaces. This
4537 allows AcpiExec to simulate these address spaces, similar to the current
4538 support for SystemMemory and SystemIO.
4540 Debugger: Added new command to read/write/compare all namespace objects.
4541 The command "test objects" will exercise the entire namespace by writing
4542 new values to each data object, and ensuring that the write was
4543 successful. The original value is then restored and verified.
4545 Debugger: Added the "test predefined" command. This change makes this
4546 test public and puts it under the new "test" command. The test executes
4547 each and every predefined name within the current namespace.
4550 ----------------------------------------
4551 18 December 2013. Summary of changes for version 20131218:
4553 Global note: The ACPI 5.0A specification was released this month. There
4554 are no changes needed for ACPICA since this release of ACPI is an
4555 errata/clarification release. The specification is available at
4559 1) ACPICA kernel-resident subsystem:
4561 Added validation of the XSDT root table if it is present. Some older
4562 platforms contain an XSDT that is ill-formed or otherwise invalid (such
4563 as containing some or all entries that are NULL pointers). This change
4564 adds a new function to validate the XSDT before actually using it. If the
4565 XSDT is found to be invalid, ACPICA will now automatically fall back to
4566 using the RSDT instead. Original implementation by Zhao Yakui. Ported to
4567 ACPICA and enhanced by Lv Zheng and Bob Moore.
4569 Added a runtime option to ignore the XSDT and force the use of the RSDT.
4570 This change adds a runtime option that will force ACPICA to use the RSDT
4571 instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
4572 requires that an XSDT be used instead of the RSDT, the XSDT has been
4573 found to be corrupt or ill-formed on some machines. Lv Zheng.
4575 Added a runtime option to favor 32-bit FADT register addresses over the
4576 64-bit addresses. This change adds an option to favor 32-bit FADT
4577 addresses when there is a conflict between the 32-bit and 64-bit versions
4578 of the same register. The default behavior is to use the 64-bit version
4579 in accordance with the ACPI specification. This can now be overridden via
4580 the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
4582 During the change above, the internal "Convert FADT" and "Verify FADT"
4583 functions have been merged to simplify the code, making it easier to
4584 understand and maintain. ACPICA BZ 933.
4586 Improve exception reporting and handling for GPE block installation.
4587 Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
4588 status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
4590 Added helper macros to extract bus/segment numbers from the HEST table.
4591 This change adds two macros to extract the encoded bus and segment
4592 numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
4593 Betty Dall <betty.dall@hp.com>
4595 Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
4596 by ACPICA. It is not a public macro, so it should have no effect on
4597 existing OSV code. Lv Zheng.
4599 Example Code and Data Size: These are the sizes for the OS-independent
4600 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4601 debug version of the code includes the debug output trace mechanism and
4602 has a much larger code and data size.
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
4608 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
4609 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
4612 2) iASL Compiler/Disassembler and Tools:
4614 Disassembler: Improved pathname support for emitted External()
4615 statements. This change adds full pathname support for external names
4616 that have been resolved internally by the inclusion of additional ACPI
4617 tables (via the iASL -e option). Without this change, the disassembler
4618 can emit multiple externals for the same object, or it become confused
4619 when the Scope() operator is used on an external object. Overall, greatly
4620 improves the ability to actually recompile the emitted ASL code when
4621 objects a referenced across multiple ACPI tables. Reported by Michael
4622 Tsirkin (mst@redhat.com).
4624 Tests/ASLTS: Updated functional control suite to execute with no errors.
4625 David Box. Fixed several errors related to the testing of the interpreter
4626 slack mode. Lv Zheng.
4628 iASL: Added support to detect names that are declared within a control
4629 method, but are unused (these are temporary names that are only valid
4630 during the time the method is executing). A remark is issued for these
4631 cases. ACPICA BZ 1022.
4633 iASL: Added full support for the DBG2 table. Adds full disassembler,
4634 table compiler, and template generator support for the DBG2 table (Debug
4637 iASL: Added full support for the PCCT table, update the table definition.
4638 Updates the PCCT table definition in the actbl3.h header and adds table
4639 compiler and template generator support.
4641 iASL: Added an option to emit only error messages (no warnings/remarks).
4642 The -ve option will enable only error messages, warnings and remarks are
4643 suppressed. This can simplify debugging when only the errors are
4644 important, such as when an ACPI table is disassembled and there are many
4645 warnings and remarks -- but only the actual errors are of real interest.
4647 Example ACPICA code (source/tools/examples): Updated the example code so
4648 that it builds to an actual working program, not just example code. Added
4649 ACPI tables and execution of an example control method in the DSDT. Added
4650 makefile support for Unix generation.
4653 ----------------------------------------
4654 15 November 2013. Summary of changes for version 20131115:
4656 This release is available at https://acpica.org/downloads
4659 1) ACPICA kernel-resident subsystem:
4661 Resource Manager: Fixed loop termination for the "get AML length"
4662 function. The loop previously had an error termination on a NULL resource
4663 pointer, which can never happen since the loop simply increments a valid
4664 resource pointer. This fix changes the loop to terminate with an error on
4665 an invalid end-of-buffer condition. The problem can be seen as an
4666 infinite loop by callers to AcpiSetCurrentResources with an invalid or
4667 corrupted resource descriptor, or a resource descriptor that is missing
4668 an END_TAG descriptor. Reported by Dan Carpenter
4669 <dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
4671 Table unload and ACPICA termination: Delete all attached data objects
4672 during namespace node deletion. This fix updates namespace node deletion
4673 to delete the entire list of attached objects (attached via
4674 AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
4675 1024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
4677 ACPICA termination: Added support to delete all objects attached to the
4678 root namespace node. This fix deletes any and all objects that have been
4679 attached to the root node via AcpiAttachData. Previously, none of these
4680 objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
4682 Debug output: Do not emit the function nesting level for the in-kernel
4683 build. The nesting level is really only useful during a single-thread
4684 execution. Therefore, only enable this output for the AcpiExec utility.
4685 Also, only emit the thread ID when executing under AcpiExec (Context
4686 switches are still always detected and a message is emitted). ACPICA BZ
4689 Example Code and Data Size: These are the sizes for the OS-independent
4690 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4691 debug version of the code includes the debug output trace mechanism and
4692 has a much larger code and data size.
4695 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
4696 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
4698 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
4699 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
4702 2) iASL Compiler/Disassembler and Tools:
4704 AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
4705 correct portable POSIX header for terminal control functions.
4707 Disassembler: Fixed control method invocation issues related to the use
4708 of the CondRefOf() operator. The problem is seen in the disassembly where
4709 control method invocations may not be disassembled properly if the
4710 control method name has been used previously as an argument to CondRefOf.
4711 The solution is to not attempt to emit an external declaration for the
4712 CondRefOf target (it is not necessary in the first place). This prevents
4713 disassembler object type confusion. ACPICA BZ 988.
4715 Unix Makefiles: Added an option to disable compiler optimizations and the
4716 _FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
4717 with optimizations (reportedly, gcc 4.4 for example). This change adds a
4718 command line option for make (NOOPT) that disables all compiler
4719 optimizations and the _FORTIFY_SOURCE compiler flag. The default
4720 optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
4721 1034. Lv Zheng, Bob Moore.
4723 Tests/ASLTS: Added options to specify individual test cases and modes.
4724 This allows testers running aslts.sh to optionally specify individual
4725 test modes and test cases. Also added an option to disable the forced
4726 generation of the ACPICA tools from source if desired. Lv Zheng.
4728 ----------------------------------------
4729 27 September 2013. Summary of changes for version 20130927:
4731 This release is available at https://acpica.org/downloads
4734 1) ACPICA kernel-resident subsystem:
4736 Fixed a problem with store operations to reference objects. This change
4737 fixes a problem where a Store operation to an ArgX object that contained
4739 reference to a field object did not complete the automatic dereference
4741 then write to the actual field object. Instead, the object type of the
4742 field object was inadvertently changed to match the type of the source
4743 operand. The new behavior will actually write to the field object (buffer
4744 field or field unit), thus matching the correct ACPI-defined behavior.
4746 Implemented support to allow the host to redefine individual OSL
4747 prototypes. This change enables the host to redefine OSL prototypes found
4748 in the acpiosxf.h file. This allows the host to implement OSL interfaces
4749 with a macro or inlined function. Further, it allows the host to add any
4750 additional required modifiers such as __iomem, __init, __exit, etc., as
4751 necessary on a per-interface basis. Enables maximum flexibility for the
4752 OSL interfaces. Lv Zheng.
4754 Hardcoded the access width for the FADT-defined reset register. The ACPI
4755 specification requires the reset register width to be 8 bits. ACPICA now
4756 hardcodes the width to 8 and ignores the FADT width value. This provides
4757 compatibility with other ACPI implementations that have allowed BIOS code
4758 with bad register width values to go unnoticed. Matthew Garett, Bob
4762 Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
4764 in the OSL header (acpiosxf). The change modifies the position of this
4765 macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
4766 build issues if the OSL defines the implementation of the interface to be
4767 an inline stub function. Lv Zheng.
4769 Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
4770 initialization interfaces. This change adds a new macro for the main init
4771 and terminate external interfaces in order to support hosts that require
4772 additional or different processing for these functions. Changed from
4773 ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
4776 Cleaned up the memory allocation macros for configurability. In the
4778 case, the ACPI_ALLOCATE and related macros now resolve directly to their
4779 respective AcpiOs* OSL interfaces. Two options:
4780 1) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
4781 default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
4782 2) For AcpiExec (and for debugging), the macros can optionally be
4784 to the local ACPICA interfaces that track each allocation (local tracking
4785 is used to immediately detect memory leaks).
4788 Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
4789 to predefine this macro to either TRUE or FALSE during the system build.
4791 Replaced __FUNCTION_ with __func__ in the gcc-specific header.
4793 Example Code and Data Size: These are the sizes for the OS-independent
4794 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4795 debug version of the code includes the debug output trace mechanism and
4796 has a much larger code and data size.
4799 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
4800 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
4802 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
4803 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4806 2) iASL Compiler/Disassembler and Tools:
4808 iASL: Implemented wildcard support for the -e option. This simplifies use
4809 when there are many SSDTs that must be included to resolve external
4811 declarations. ACPICA BZ 1041. Example:
4812 iasl -e ssdt*.dat -d dsdt.dat
4814 AcpiExec: Add history/line-editing for Unix/Linux systems. This change
4815 adds a portable module that implements full history and limited line
4816 editing for Unix and Linux systems. It does not use readline() due to
4817 portability issues. Instead it uses the POSIX termio interface to put the
4818 terminal in raw input mode so that the various special keys can be
4820 (such as up/down-arrow for history support and left/right-arrow for line
4821 editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
4823 AcpiXtract: Add support to handle (ignore) "empty" lines containing only
4824 one or more spaces. This provides compatible with early or different
4825 versions of the AcpiDump utility. ACPICA BZ 1044.
4827 AcpiDump: Do not ignore tables that contain only an ACPI table header.
4828 Apparently, some BIOSs create SSDTs that contain an ACPI table header but
4829 no other data. This change adds support to dump these tables. Any tables
4830 shorter than the length of an ACPI table header remain in error (an error
4831 message is emitted). Reported by Yi Li.
4833 Debugger: Echo actual command along with the "unknown command" message.
4835 ----------------------------------------
4836 23 August 2013. Summary of changes for version 20130823:
4838 1) ACPICA kernel-resident subsystem:
4840 Implemented support for host-installed System Control Interrupt (SCI)
4841 handlers. Certain ACPI functionality requires the host to handle raw
4842 SCIs. For example, the "SCI Doorbell" that is defined for memory power
4843 state support requires the host device driver to handle SCIs to examine
4844 if the doorbell has been activated. Multiple SCI handlers can be
4845 installed to allow for future expansion. New external interfaces are
4846 AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
4847 details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
4849 Operation region support: Never locally free the handler "context"
4850 pointer. This change removes some dangerous code that attempts to free
4851 the handler context pointer in some (rare) circumstances. The owner of
4852 the handler owns this pointer and the ACPICA code should never touch it.
4853 Although not seen to be an issue in any kernel, it did show up as a
4854 problem (fault) under AcpiExec. Also, set the internal storage field for
4855 the context pointer to zero when the region is deactivated, simply for
4856 sanity. David Box. ACPICA BZ 1039.
4858 AcpiRead: On error, do not modify the return value target location. If an
4859 error happens in the middle of a split 32/32 64-bit I/O operation, do not
4860 modify the target of the return value pointer. Makes the code consistent
4861 with the rest of ACPICA. Bjorn Helgaas.
4863 Example Code and Data Size: These are the sizes for the OS-independent
4864 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4865 debug version of the code includes the debug output trace mechanism and
4866 has a much larger code and data size.
4869 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
4870 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4872 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
4873 Debug Version: 185.4K Code, 77.1K Data, 262.5K Total
4876 2) iASL Compiler/Disassembler and Tools:
4878 AcpiDump: Implemented several new features and fixed some problems:
4879 1) Added support to dump the RSDP, RSDT, and XSDT tables.
4880 2) Added support for multiple table instances (SSDT, UEFI).
4881 3) Added option to dump "customized" (overridden) tables (-c).
4882 4) Fixed a problem where some table filenames were improperly
4884 5) Improved some error messages, removed some unnecessary messages.
4886 iASL: Implemented additional support for disassembly of ACPI tables that
4887 contain invocations of external control methods. The -fe<file> option
4888 allows the import of a file that specifies the external methods along
4889 with the required number of arguments for each -- allowing for the
4890 correct disassembly of the table. This is a workaround for a limitation
4891 of AML code where the disassembler often cannot determine the number of
4892 arguments required for an external control method and generates incorrect
4893 ASL code. See the iASL reference for details. ACPICA BZ 1030.
4895 Debugger: Implemented a new command (paths) that displays the full
4896 pathnames (namepaths) and object types of all objects in the namespace.
4897 This is an alternative to the namespace command.
4899 Debugger: Implemented a new command (sci) that invokes the SCI dispatch
4900 mechanism and any installed handlers.
4902 iASL: Fixed a possible segfault for "too many parent prefixes" condition.
4903 This can occur if there are too many parent prefixes in a namepath (for
4904 example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
4906 Application OSLs: Set the return value for the PCI read functions. These
4907 functions simply return AE_OK, but should set the return value to zero
4908 also. This change implements this. ACPICA BZ 1038.
4910 Debugger: Prevent possible command line buffer overflow. Increase the
4911 size of a couple of the debugger line buffers, and ensure that overflow
4912 cannot happen. ACPICA BZ 1037.
4914 iASL: Changed to abort immediately on serious errors during the parsing
4915 phase. Due to the nature of ASL, there is no point in attempting to
4916 compile these types of errors, and they typically end up causing a
4917 cascade of hundreds of errors which obscure the original problem.
4919 ----------------------------------------
4920 25 July 2013. Summary of changes for version 20130725:
4922 1) ACPICA kernel-resident subsystem:
4924 Fixed a problem with the DerefOf operator where references to FieldUnits
4925 and BufferFields incorrectly returned the parent object, not the actual
4926 value of the object. After this change, a dereference of a FieldUnit
4927 reference results in a read operation on the field to get the value, and
4928 likewise, the appropriate BufferField value is extracted from the target
4931 Fixed a problem where the _WAK method could cause a fault under these
4932 circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
4933 method returned no value. The problem is rarely seen because most kernels
4934 run ACPICA in slack mode.
4936 For the DerefOf operator, a fatal error now results if an attempt is made
4937 to dereference a reference (created by the Index operator) to a NULL
4938 package element. Provides compatibility with other ACPI implementations,
4939 and this behavior will be added to a future version of the ACPI
4942 The ACPI Power Management Timer (defined in the FADT) is now optional.
4943 This provides compatibility with other ACPI implementations and will
4944 appear in the next version of the ACPI specification. If there is no PM
4945 Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
4946 zero in the FADT indicates no PM timer.
4948 Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
4949 allows the host to globally enable/disable all vendor strings, all
4950 feature strings, or both. Intended to be primarily used for debugging
4951 purposes only. Lv Zheng.
4953 Expose the collected _OSI data to the host via a global variable. This
4954 data tracks the highest level vendor ID that has been invoked by the BIOS
4955 so that the host (and potentially ACPICA itself) can change behaviors
4956 based upon the age of the BIOS.
4958 Example Code and Data Size: These are the sizes for the OS-independent
4959 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4960 debug version of the code includes the debug output trace mechanism and
4961 has a much larger code and data size.
4964 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
4965 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4967 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
4968 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
4971 2) iASL Compiler/Disassembler and Tools:
4973 iASL: Created the following enhancements for the -so option (create
4975 1)Add offsets for the last nameseg in each namepath for every supported
4977 2)Add support for Processor, Device, Thermal Zone, and Scope objects
4978 3)Add the actual AML opcode for the parent object of every supported
4980 4)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
4982 Disassembler: Emit all unresolved external symbols in a single block.
4983 These are external references to control methods that could not be
4984 resolved, and thus, the disassembler had to make a guess at the number of
4987 iASL: The argument to the -T option (create table template) is now
4988 optional. If not specified, the default table is a DSDT, typically the
4991 ----------------------------------------
4992 26 June 2013. Summary of changes for version 20130626:
4994 1) ACPICA kernel-resident subsystem:
4996 Fixed an issue with runtime repair of the _CST object. Null or invalid
4997 elements were not always removed properly. Lv Zheng.
4999 Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
5000 FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
5001 the maximum number of GPEs is 1016. Use of multiple GPE block devices
5002 makes the system-wide number of GPEs essentially unlimited.
5004 Example Code and Data Size: These are the sizes for the OS-independent
5005 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5006 debug version of the code includes the debug output trace mechanism and
5007 has a much larger code and data size.
5010 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
5011 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
5013 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
5014 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
5017 2) iASL Compiler/Disassembler and Tools:
5019 Portable AcpiDump: Implemented full support for the Linux and FreeBSD
5020 hosts. Now supports Linux, FreeBSD, and Windows.
5022 Disassembler: Added some missing types for the HEST and EINJ tables: "Set
5023 Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
5025 iASL/Preprocessor: Implemented full support for nested
5026 #if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
5028 Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
5029 max. The original purpose of this constraint was to limit the amount of
5030 debug output. However, the string function in question (UtPrintString) is
5031 now used for the disassembler also, where 256 bytes is insufficient.
5032 Reported by RehabMan@GitHub.
5034 iASL/DataTables: Fixed some problems and issues with compilation of DMAR
5035 tables. ACPICA BZ 999. Lv Zheng.
5037 iASL: Fixed a couple of error exit issues that could result in a "Could
5038 not delete <file>" message during ASL compilation.
5040 AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
5041 the actual signatures for these tables are "FACP" and "APIC",
5044 AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
5045 tables are allowed to have multiple instances.
5047 ----------------------------------------
5048 17 May 2013. Summary of changes for version 20130517:
5050 1) ACPICA kernel-resident subsystem:
5052 Fixed a regression introduced in version 20130328 for _INI methods. This
5053 change fixes a problem introduced in 20130328 where _INI methods are no
5054 longer executed properly because of a memory block that was not
5055 initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
5056 <tomasz.nowicki@linaro.org>.
5058 Fixed a possible problem with the new extended sleep registers in the
5060 5.0 FADT. Do not use these registers (even if populated) unless the HW-
5061 reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
5064 Implemented return value repair code for _CST predefined objects: Sort
5066 list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
5068 Implemented a debug-only option to disable loading of SSDTs from the
5069 RSDT/XSDT during ACPICA initialization. This can be useful for debugging
5070 ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
5071 acglobal.h - ACPICA BZ 1005. Lv Zheng.
5073 Fixed some issues in the ACPICA initialization and termination code:
5074 Tomasz Nowicki <tomasz.nowicki@linaro.org>
5075 1) Clear events initialized flag upon event component termination. ACPICA
5077 2) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
5078 3) Delete global lock pending lock during termination. ACPICA BZ 1012.
5079 4) Clear debug buffer global on termination to prevent possible multiple
5080 delete. ACPICA BZ 1010.
5082 Standardized all switch() blocks across the entire source base. After
5084 years, different formatting for switch() had crept in. This change makes
5085 the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
5087 Split some files to enhance ACPICA modularity and configurability:
5088 1) Split buffer dump routines into utilities/utbuffer.c
5089 2) Split internal error message routines into utilities/uterror.c
5090 3) Split table print utilities into tables/tbprint.c
5091 4) Split iASL command-line option processing into asloptions.c
5093 Makefile enhancements:
5094 1) Support for all new files above.
5095 2) Abort make on errors from any subcomponent. Chao Guan.
5096 3) Add build support for Apple Mac OS X. Liang Qi.
5098 Example Code and Data Size: These are the sizes for the OS-independent
5099 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5100 debug version of the code includes the debug output trace mechanism and
5101 has a much larger code and data size.
5104 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
5105 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
5107 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
5108 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
5111 2) iASL Compiler/Disassembler and Tools:
5113 New utility: Implemented an easily portable version of the acpidump
5114 utility to extract ACPI tables from the system (or a file) in an ASCII
5116 dump format. The top-level code implements the various command line
5117 options, file I/O, and table dump routines. To port to a new host, only
5118 three functions need to be implemented to get tables -- since this
5119 functionality is OS-dependent. See the tools/acpidump/apmain.c module and
5120 the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
5121 1) The Windows version obtains the ACPI tables from the Registry.
5122 2) The Linux version is under development.
5123 3) Other hosts - If an OS-dependent module is submitted, it will be
5124 distributed with ACPICA.
5126 iASL: Fixed a regression for -D preprocessor option (define symbol). A
5127 restructuring/change to the initialization sequence caused this option to
5128 no longer work properly.
5130 iASL: Implemented a mechanism to disable specific warnings and remarks.
5131 Adds a new command line option, "-vw <messageid> as well as "#pragma
5132 disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
5134 iASL: Fix for too-strict package object validation. The package object
5135 validation for return values from the predefined names is a bit too
5136 strict, it does not allow names references within the package (which will
5137 be resolved at runtime.) These types of references cannot be validated at
5138 compile time. This change ignores named references within package objects
5139 for names that return or define static packages.
5141 Debugger: Fixed the 80-character command line limitation for the History
5142 command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
5144 iASL: Added control method and package support for the -so option
5145 (generates AML offset table for BIOS support.)
5147 iASL: issue a remark if a non-serialized method creates named objects. If
5148 a thread blocks within the method for any reason, and another thread
5149 enters the method, the method will fail because an attempt will be made
5151 create the same (named) object twice. In this case, issue a remark that
5152 the method should be marked serialized. NOTE: may become a warning later.
5155 ----------------------------------------
5156 18 April 2013. Summary of changes for version 20130418:
5158 1) ACPICA kernel-resident subsystem:
5160 Fixed a possible buffer overrun during some rare but specific field unit
5161 read operations. This overrun can only happen if the DSDT version is 1 --
5162 meaning that all AML integers are 32 bits -- and the field length is
5163 between 33 and 55 bits long. During the read, an internal buffer object
5165 created for the field unit because the field is larger than an integer
5167 bits). However, in this case, the buffer will be incorrectly written
5168 beyond the end because the buffer length is less than the internal
5170 of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
5171 long, but a full 8 bytes will be written.
5173 Updated the Embedded Controller "orphan" _REG method support. This refers
5174 to _REG methods under the EC device that have no corresponding operation
5175 region. This is allowed by the ACPI specification. This update removes a
5176 dependency on the existence an ECDT table. It will execute an orphan _REG
5177 method as long as the operation region handler for the EC is installed at
5178 the EC device node and not the namespace root. Rui Zhang (original
5179 update), Bob Moore (update/integrate).
5181 Implemented run-time argument typechecking for all predefined ACPI names
5182 (_STA, _BIF, etc.) This change performs object typechecking on all
5183 incoming arguments for all predefined names executed via
5184 AcpiEvaluateObject. This ensures that ACPI-related device drivers are
5185 passing correct object types as well as the correct number of arguments
5186 (therefore identifying any issues immediately). Also, the ASL/namespace
5187 definition of the predefined name is checked against the ACPI
5188 specification for the proper argument count. Adds one new file,
5191 Changed an exception code for the ASL UnLoad() operator. Changed the
5192 exception code for the case where the input DdbHandle is invalid, from
5193 AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
5195 Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
5196 global makefile. The use of this flag causes compiler errors on earlier
5197 versions of GCC, so it has been removed for compatibility.
5199 Miscellaneous cleanup:
5200 1) Removed some unused/obsolete macros
5201 2) Fixed a possible memory leak in the _OSI support
5202 3) Removed an unused variable in the predefined name support
5203 4) Windows OSL: remove obsolete reference to a memory list field
5205 Example Code and Data Size: These are the sizes for the OS-independent
5206 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5207 debug version of the code includes the debug output trace mechanism and
5208 has a much larger code and data size.
5211 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
5212 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
5214 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
5215 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
5218 2) iASL Compiler/Disassembler and Tools:
5220 AcpiExec: Added installation of a handler for the SystemCMOS address
5221 space. This prevents control method abort if a method accesses this
5224 AcpiExec: Added support for multiple EC devices, and now install EC
5225 operation region handler(s) at the actual EC device instead of the
5226 namespace root. This reflects the typical behavior of host operating
5229 AcpiExec: Updated to ensure that all operation region handlers are
5230 installed before the _REG methods are executed. This prevents a _REG
5231 method from aborting if it accesses an address space has no handler.
5232 AcpiExec installs a handler for every possible address space.
5234 Debugger: Enhanced the "handlers" command to display non-root handlers.
5235 This change enhances the handlers command to display handlers associated
5236 with individual devices throughout the namespace, in addition to the
5237 currently supported display of handlers associated with the root
5241 ASL Test Suite: Several test suite errors have been identified and
5242 resolved, reducing the total error count during execution. Chao Guan.
5244 ----------------------------------------
5245 28 March 2013. Summary of changes for version 20130328:
5247 1) ACPICA kernel-resident subsystem:
5249 Fixed several possible race conditions with the internal object reference
5250 counting mechanism. Some of the external ACPICA interfaces update object
5251 reference counts without holding the interpreter or namespace lock. This
5252 change adds a spinlock to protect reference count updates on the internal
5253 ACPICA objects. Reported by and with assistance from Andriy Gapon
5256 FADT support: Removed an extraneous warning for very large GPE register
5257 sets. This change removes a size mismatch warning if the legacy length
5258 field for a GPE register set is larger than the 64-bit GAS structure can
5259 accommodate. GPE register sets can be larger than the 255-bit width
5260 limitation of the GAS structure. Linn Crosetto (linn@hp.com).
5262 _OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
5263 return from this interface. Handles a possible timeout case if
5264 ACPI_WAIT_FOREVER is modified by the host to be a value less than
5265 "forever". Jung-uk Kim.
5267 Predefined name support: Add allowed/required argument type information
5269 the master predefined info table. This change adds the infrastructure to
5270 enable typechecking on incoming arguments for all predefined
5271 methods/objects. It does not actually contain the code that will fully
5272 utilize this information, this is still under development. Also condenses
5273 some duplicate code for the predefined names into a new module,
5274 utilities/utpredef.c
5276 Example Code and Data Size: These are the sizes for the OS-independent
5277 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5278 debug version of the code includes the debug output trace mechanism and
5279 has a much larger code and data size.
5282 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
5283 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
5285 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
5286 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
5289 2) iASL Compiler/Disassembler and Tools:
5291 iASL: Implemented a new option to simplify the development of ACPI-
5293 BIOS code. Adds support for a new "offset table" output file. The -so
5294 option will create a C table containing the AML table offsets of various
5295 named objects in the namespace so that BIOS code can modify them easily
5297 boot time. This can simplify BIOS runtime code by eliminating expensive
5298 searches for "magic values", enhancing boot times and adding greater
5299 reliability. With assistance from Lee Hamel.
5301 iASL: Allow additional predefined names to return zero-length packages.
5302 Now, all predefined names that are defined by the ACPI specification to
5303 return a "variable-length package of packages" are allowed to return a
5304 zero length top-level package. This allows the BIOS to tell the host that
5305 the requested feature is not supported, and supports existing BIOS/ASL
5308 iASL: Changed the "result not used" warning to an error. This is the case
5309 where an ASL operator is effectively a NOOP because the result of the
5310 operation is not stored anywhere. For example:
5312 There is no target (missing 3rd argument), nor is the function return
5313 value used. This is potentially a very serious problem -- since the code
5314 was probably intended to do something, but for whatever reason, the value
5315 was not stored. Therefore, this issue has been upgraded from a warning to
5318 AcpiHelp: Added allowable/required argument types to the predefined names
5319 info display. This feature utilizes the recent update to the predefined
5320 names table (above).
5322 ----------------------------------------
5323 14 February 2013. Summary of changes for version 20130214:
5325 1) ACPICA Kernel-resident Subsystem:
5327 Fixed a possible regression on some hosts: Reinstated the safe return
5328 macros (return_ACPI_STATUS, etc.) that ensure that the argument is
5329 evaluated only once. Although these macros are not needed for the ACPICA
5330 code itself, they are often used by ACPI-related host device drivers
5332 the safe feature may be necessary.
5334 Fixed several issues related to the ACPI 5.0 reduced hardware support
5335 (SOC): Now ensure that if the platform declares itself as hardware-
5337 via the FADT, the following functions become NOOPs (and always return
5338 AE_OK) because ACPI is always enabled by definition on these machines:
5344 Dynamic Object Repair: Implemented additional runtime repairs for
5345 predefined name return values. Both of these repairs can simplify code in
5346 the related device drivers that invoke these methods:
5347 1) For the _STR and _MLS names, automatically repair/convert an ASCII
5348 string to a Unicode buffer.
5349 2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
5351 lone end tag descriptor in the following cases: A Return(0) was executed,
5352 a null buffer was returned, or no object at all was returned (non-slack
5353 mode only). Adds a new file, nsconvert.c
5354 ACPICA BZ 998. Bob Moore, Lv Zheng.
5356 Resource Manager: Added additional code to prevent possible infinite
5358 while traversing corrupted or ill-formed resource template buffers. Check
5359 for zero-length resource descriptors in all code that loops through
5360 resource templates (the length field is used to index through the
5361 template). This change also hardens the external AcpiWalkResources and
5362 AcpiWalkResourceBuffer interfaces.
5364 Local Cache Manager: Enhanced the main data structure to eliminate an
5365 unnecessary mechanism to access the next object in the list. Actually
5366 provides a small performance enhancement for hosts that use the local
5367 ACPICA cache manager. Jung-uk Kim.
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: 94.5K Code, 25.4K Data, 119.9K Total
5376 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
5378 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
5379 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
5382 2) iASL Compiler/Disassembler and Tools:
5384 iASL/Disassembler: Fixed several issues with the definition of the ACPI
5385 5.0 RASF table (RAS Feature Table). This change incorporates late changes
5386 that were made to the ACPI 5.0 specification.
5388 iASL/Disassembler: Added full support for the following new ACPI tables:
5389 1) The MTMR table (MID Timer Table)
5390 2) The VRTC table (Virtual Real Time Clock Table).
5391 Includes header file, disassembler, table compiler, and template support
5394 iASL: Implemented compile-time validation of package objects returned by
5395 predefined names. This new feature validates static package objects
5396 returned by the various predefined names defined to return packages. Both
5397 object types and package lengths are validated, for both parent packages
5398 and sub-packages, if any. The code is similar in structure and behavior
5400 the runtime repair mechanism within the AML interpreter and uses the
5401 existing predefined name information table. Adds a new file, aslprepkg.c.
5404 iASL: Implemented auto-detection of binary ACPI tables for disassembly.
5405 This feature detects a binary file with a valid ACPI table header and
5406 invokes the disassembler automatically. Eliminates the need to
5407 specifically invoke the disassembler with the -d option. ACPICA BZ 862.
5409 iASL/Disassembler: Added several warnings for the case where there are
5410 unresolved control methods during the disassembly. This can potentially
5411 cause errors when the output file is compiled, because the disassembler
5412 assumes zero method arguments in these cases (it cannot determine the
5413 actual number of arguments without resolution/definition of the method).
5415 Debugger: Added support to display all resources with a single command.
5416 Invocation of the resources command with no arguments will now display
5418 resources within the current namespace.
5420 AcpiHelp: Added descriptive text for each ACPICA exception code displayed
5423 ----------------------------------------
5424 17 January 2013. Summary of changes for version 20130117:
5426 1) ACPICA Kernel-resident Subsystem:
5428 Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
5429 return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
5430 objects to return a package containing one integer, most BIOS code
5432 two integers and the previous code reflects that. However, we also need
5434 support BIOS code that actually implements to the ACPI spec, and this
5435 change reflects this.
5437 Fixed two issues with the ACPI_DEBUG_PRINT macros:
5438 1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
5439 C compilers that require this support.
5440 2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
5441 ACPI_DEBUG is already used by many of the various hosts.
5443 Updated all ACPICA copyrights and signons to 2013. Added the 2013
5444 copyright to all module headers and signons, including the standard Linux
5445 header. This affects virtually every file in the ACPICA core subsystem,
5446 iASL compiler, all ACPICA utilities, and the test suites.
5448 Example Code and Data Size: These are the sizes for the OS-independent
5449 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5450 debug version of the code includes the debug output trace mechanism and
5451 has a much larger code and data size.
5454 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
5455 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
5457 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
5458 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
5461 2) iASL Compiler/Disassembler and Tools:
5463 Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
5464 prevent a possible fault on some hosts. Some C libraries modify the arg
5465 pointer parameter to vfprintf making it difficult to call it twice in the
5466 AcpiOsVprintf function. Use a local buffer to workaround this issue. This
5467 does not affect the Windows OSL since the Win C library does not modify
5468 the arg pointer. Chao Guan, Bob Moore.
5470 iASL: Fixed a possible infinite loop when the maximum error count is
5471 reached. If an output file other than the .AML file is specified (such as
5472 a listing file), and the maximum number of errors is reached, do not
5473 attempt to flush data to the output file(s) as the compiler is aborting.
5474 This can cause an infinite loop as the max error count code essentially
5475 keeps calling itself.
5477 iASL/Disassembler: Added an option (-in) to ignore NOOP
5479 Implemented for both the compiler and the disassembler. Often, the NOOP
5480 opcode is used as padding for packages that are changed dynamically by
5482 BIOS. When disassembled and recompiled, these NOOPs will cause syntax
5483 errors. This option causes the disassembler to ignore all NOOP opcodes
5484 (0xA3), and it also causes the compiler to ignore all ASL source code
5488 Debugger: Enhanced the Sleep command to execute all sleep states. This
5489 change allows Sleep to be invoked with no arguments and causes the
5490 debugger to execute all of the sleep states, 0-5, automatically.
5492 ----------------------------------------
5493 20 December 2012. Summary of changes for version 20121220:
5495 1) ACPICA Kernel-resident Subsystem:
5497 Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
5498 alternate entry point for AcpiWalkResources and improves the usability of
5499 the resource manager by accepting as input a buffer containing the output
5500 of either a _CRS, _PRS, or _AEI method. The key functionality is that the
5501 input buffer is not deleted by this interface so that it can be used by
5502 the host later. See the ACPICA reference for details.
5504 Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
5505 (DSDT version < 2). The constant will be truncated and this warning
5506 reflects that behavior.
5508 Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
5509 ExtendedInterrupt, and GpioInt descriptors. This change adds support to
5510 both get and set the new wake bit in these descriptors, separately from
5511 the existing share bit. Reported by Aaron Lu.
5513 Interpreter: Fix Store() when an implicit conversion is not possible. For
5514 example, in the cases such as a store of a string to an existing package
5515 object, implement the store as a CopyObject(). This is a small departure
5516 from the ACPI specification which states that the control method should
5518 aborted in this case. However, the ASLTS suite depends on this behavior.
5520 Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
5521 macros: check if debug output is currently enabled as soon as possible to
5522 minimize performance impact if debug is in fact not enabled.
5524 Source code restructuring: Cleanup to improve modularity. The following
5525 new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
5526 psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
5527 Associated makefiles and project files have been updated.
5529 Changed an exception code for LoadTable operator. For the case where one
5530 of the input strings is too long, change the returned exception code from
5531 AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
5533 Fixed a possible memory leak in dispatcher error path. On error, delete
5534 the mutex object created during method mutex creation. Reported by
5535 tim.gardner@canonical.com.
5537 Example Code and Data Size: These are the sizes for the OS-independent
5538 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5539 debug version of the code includes the debug output trace mechanism and
5540 has a much larger code and data size.
5543 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
5544 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
5546 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
5547 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
5550 2) iASL Compiler/Disassembler and Tools:
5552 iASL: Disallow a method call as argument to the ObjectType ASL operator.
5553 This change tracks an errata to the ACPI 5.0 document. The AML grammar
5554 will not allow the interpreter to differentiate between a method and a
5555 method invocation when these are used as an argument to the ObjectType
5556 operator. The ACPI specification change is to disallow a method
5558 (UserTerm) for the ObjectType operator.
5560 Finish support for the TPM2 and CSRT tables in the headers, table
5561 compiler, and disassembler.
5563 Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
5564 always expires immediately if the semaphore is not available. The
5566 code was using a relative-time timeout, but sem_timedwait requires the
5568 of an absolute time.
5570 iASL: Added a remark if the Timer() operator is used within a 32-bit
5571 table. This operator returns a 64-bit time value that will be truncated
5572 within a 32-bit table.
5574 iASL Source code restructuring: Cleanup to improve modularity. The
5575 following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
5576 aslmethod.c, and aslfileio.c. Associated makefiles and project files have
5580 ----------------------------------------
5581 14 November 2012. Summary of changes for version 20121114:
5583 1) ACPICA Kernel-resident Subsystem:
5585 Implemented a performance enhancement for ACPI/AML Package objects. This
5586 change greatly increases the performance of Package objects within the
5587 interpreter. It changes the processing of reference counts for packages
5589 optimizing for the most common case where the package sub-objects are
5590 either Integers, Strings, or Buffers. Increases the overall performance
5592 the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
5594 Chao Guan. ACPICA BZ 943.
5596 Implemented and deployed common macros to extract flag bits from resource
5597 descriptors. Improves readability and maintainability of the code. Fixes
5599 problem with the UART serial bus descriptor for the number of data bits
5600 flags (was incorrectly 2 bits, should be 3).
5602 Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
5603 of the macros and changed the SETx macros to the style of (destination,
5604 source). Also added ACPI_CASTx companion macros. Lv Zheng.
5606 Example Code and Data Size: These are the sizes for the OS-independent
5607 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5608 debug version of the code includes the debug output trace mechanism and
5609 has a much larger code and data size.
5612 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
5613 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
5615 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
5616 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
5619 2) iASL Compiler/Disassembler and Tools:
5621 Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
5622 adds the ShareAndWake and ExclusiveAndWake flags which were added to the
5623 Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
5625 Disassembler: Fixed a problem with external declaration generation. Fixes
5626 a problem where an incorrect pathname could be generated for an external
5627 declaration if the original reference to the object includes leading
5628 carats (^). ACPICA BZ 984.
5630 Debugger: Completed a major update for the Disassemble<method> command.
5631 This command was out-of-date and did not properly disassemble control
5632 methods that had any reasonable complexity. This fix brings the command
5634 to the same level as the rest of the disassembler. Adds one new file,
5635 dmdeferred.c, which is existing code that is now common with the main
5636 disassembler and the debugger disassemble command. ACPICA MZ 978.
5638 iASL: Moved the parser entry prototype to avoid a duplicate declaration.
5639 Newer versions of Bison emit this prototype, so moved the prototype out
5641 the iASL header to where it is actually used in order to avoid a
5645 iASL/Tools: Standardized use of the stream I/O functions:
5646 1) Ensure check for I/O error after every fopen/fread/fwrite
5647 2) Ensure proper order of size/count arguments for fread/fwrite
5648 3) Use test of (Actual != Requested) after all fwrite, and most fread
5649 4) Standardize I/O error messages
5650 Improves reliability and maintainability of the code. Bob Moore, Lv
5654 Disassembler: Prevent duplicate External() statements. During generation
5655 of external statements, detect similar pathnames that are actually
5656 duplicates such as these:
5659 Remove all leading '\' characters from pathnames during the external
5660 statement generation so that duplicates will be detected and tossed.
5663 Tools: Replace low-level I/O with stream I/O functions. Replace
5664 open/read/write/close with the stream I/O equivalents
5665 fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
5668 AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
5669 name header so that AcpiXtract recognizes the output file/table.
5671 iASL: Remove obsolete -2 option flag. Originally intended to force the
5672 compiler/disassembler into an ACPI 2.0 mode, this was never implemented
5673 and the entire concept is now obsolete.
5675 ----------------------------------------
5676 18 October 2012. Summary of changes for version 20121018:
5679 1) ACPICA Kernel-resident Subsystem:
5681 Updated support for the ACPI 5.0 MPST table. Fixes some problems
5682 introduced by late changes to the table as it was added to the ACPI 5.0
5683 specification. Includes header, disassembler, and data table compiler
5684 support as well as a new version of the MPST template.
5686 AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
5687 5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
5688 methods: _HID, _CID, and _UID.
5690 Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
5691 ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
5692 name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
5693 names for their various drivers. Affects the AcpiGetObjectInfo external
5694 interface, and other internal interfaces as well.
5696 Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
5697 This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
5698 on machines that support non-aligned transfers. Optimizes for this case
5699 rather than using a strncpy. With assistance from Zheng Lv.
5701 Resource Manager: Small fix for buffer size calculation. Fixed a one byte
5702 error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
5704 Added a new debug print message for AML mutex objects that are force-
5705 released. At control method termination, any currently acquired mutex
5706 objects are force-released. Adds a new debug-only message for each one
5709 Audited/updated all ACPICA return macros and the function debug depth
5710 counter: 1) Ensure that all functions that use the various TRACE macros
5711 also use the appropriate ACPICA return macros. 2) Ensure that all normal
5712 return statements surround the return expression (value) with parens to
5713 ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
5714 Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
5716 Global source code changes/maintenance: All extra lines at the start and
5717 end of each source file have been removed for consistency. Also, within
5718 comments, all new sentences start with a single space instead of a double
5719 space, again for consistency across the code base.
5721 Example Code and Data Size: These are the sizes for the OS-independent
5722 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5723 debug version of the code includes the debug output trace mechanism and
5724 has a much larger code and data size.
5727 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
5728 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
5730 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
5731 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
5734 2) iASL Compiler/Disassembler and Tools:
5736 AcpiExec: Improved the algorithm used for memory leak/corruption
5737 detection. Added some intelligence to the code that maintains the global
5738 list of allocated memory. The list is now ordered by allocated memory
5739 address, significantly improving performance. When running AcpiExec on
5740 the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
5741 on the platform and/or the environment. Note, this performance
5742 enhancement affects the AcpiExec utility only, not the kernel-resident
5745 Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
5746 the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
5747 incorrect table offset reported for invalid opcodes. Report the original
5748 32-bit value for bad ACPI_NAMEs (as well as the repaired name.)
5750 Disassembler: Enhanced the -vt option to emit the binary table data in
5751 hex format to assist with debugging.
5753 Fixed a potential filename buffer overflow in osunixdir.c. Increased the
5754 size of file structure. Colin Ian King.
5756 ----------------------------------------
5757 13 September 2012. Summary of changes for version 20120913:
5760 1) ACPICA Kernel-resident Subsystem:
5762 ACPI 5.0: Added two new notify types for the Hardware Error Notification
5763 Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
5767 Table Manager: Merged/removed duplicate code in the root table resize
5768 functions. One function is external, the other is internal. Lv Zheng,
5772 Makefiles: Completely removed the obsolete "Linux" makefiles under
5773 acpica/generate/linux. These makefiles are obsolete and have been
5776 the generic unix makefiles under acpica/generate/unix.
5778 Makefiles: Ensure that binary files always copied properly. Minor rule
5780 to ensure that the final binary output files are always copied up to the
5781 appropriate binary directory (bin32 or bin64.)
5783 Example Code and Data Size: These are the sizes for the OS-independent
5784 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5786 version of the code includes the debug output trace mechanism and has a
5788 larger code and data size.
5791 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
5792 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
5794 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
5795 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
5798 2) iASL Compiler/Disassembler and Tools:
5800 Disassembler: Fixed a possible fault during the disassembly of resource
5801 descriptors when a second parse is required because of the invocation of
5802 external control methods within the table. With assistance from
5803 adq@lidskialf.net. ACPICA BZ 976.
5805 iASL: Fixed a namepath optimization problem. An error can occur if the
5807 node that contains the namepath to be optimized does not have a parent
5809 that is a named object. This change fixes the problem.
5811 iASL: Fixed a regression where the AML file is not deleted on errors. The
5813 output file should be deleted if there are any errors during the
5816 only exception is if the -f (force output) option is used. ACPICA BZ 974.
5818 iASL: Added a feature to automatically increase internal line buffer
5820 Via realloc(), automatically increase the internal line buffer sizes as
5821 necessary to support very long source code lines. The current version of
5823 preprocessor requires a buffer long enough to contain full source code
5825 This change increases the line buffer(s) if the input lines go beyond the
5826 current buffer size. This eliminates errors that occurred when a source
5828 line was longer than the buffer.
5830 iASL: Fixed a problem with constant folding in method declarations. The
5831 SyncLevel term is a ByteConstExpr, and incorrect code would be generated
5833 Type3 opcode was used.
5835 Debugger: Improved command help support. For incorrect argument count,
5837 full help for the command. For help command itself, allow an argument to
5840 Test Suites: Several bug fixes for the ASLTS suite reduces the number of
5841 errors during execution of the suite. Guan Chao.
5843 ----------------------------------------
5844 16 August 2012. Summary of changes for version 20120816:
5847 1) ACPICA Kernel-resident Subsystem:
5849 Removed all use of the deprecated _GTS and _BFS predefined methods. The
5851 (Going To Sleep) and _BFS (Back From Sleep) methods are essentially
5852 deprecated and will probably be removed from the ACPI specification.
5854 does not invoke them, and reportedly never will. The final nail in the
5856 is that the ACPI specification states that these methods must be run with
5857 interrupts off, which is not going to happen in a kernel interpreter.
5859 Linux has removed all use of the methods also. It was discovered that
5860 invoking these functions caused failures on some machines, probably
5862 they were never tested since Windows does not call them. Affects two
5864 interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
5867 Implemented support for complex bit-packed buffers returned from the _PLD
5868 (Physical Location of Device) predefined method. Adds a new external
5869 interface, AcpiDecodePldBuffer that parses the buffer into a more usable
5871 structure. Note: C Bitfields cannot be used for this type of predefined
5872 structure since the memory layout of individual bitfields is not defined
5874 the C language. In addition, there are endian concerns where a compiler
5876 change the bitfield ordering based on the machine type. The new ACPICA
5877 interface eliminates these issues, and should be called after _PLD is
5878 executed. ACPICA BZ 954.
5880 Implemented a change to allow a scope change to root (via "Scope (\)")
5882 execution of module-level ASL code (code that is executed at table load
5885 Added the Windows8/Server2012 string for the _OSI method. This change
5888 new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
5891 Added header support for the new ACPI tables DBG2 (Debug Port Table Type
5893 and CSRT (Core System Resource Table).
5895 Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
5896 names. This simplifies access to the buffers returned by these predefined
5897 names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
5899 GPE support: Removed an extraneous parameter from the various low-level
5900 internal GPE functions. Tang Feng.
5902 Removed the linux makefiles from the unix packages. The generate/linux
5903 makefiles are obsolete and have been removed from the unix tarball
5905 packages. The replacement makefiles are under generate/unix, and there is
5907 top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
5909 Updates for Unix makefiles:
5910 1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
5911 2) Update linker flags (move to end of command line) for AcpiExec
5915 Split ACPICA initialization functions to new file, utxfinit.c. Split from
5916 utxface.c to improve modularity and reduce file size.
5918 Example Code and Data Size: These are the sizes for the OS-independent
5919 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5920 debug version of the code includes the debug output trace mechanism and
5922 much larger code and data size.
5925 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
5926 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
5928 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
5929 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
5932 2) iASL Compiler/Disassembler and Tools:
5934 iASL: Fixed a problem with constant folding for fixed-length constant
5935 expressions. The constant-folding code was not being invoked for constant
5936 expressions that allow the use of type 3/4/5 opcodes to generate
5938 for expressions such as ByteConstExpr, WordConstExpr, etc. This could
5940 in the generation of invalid AML bytecode. ACPICA BZ 970.
5942 iASL: Fixed a generation issue on newer versions of Bison. Newer versions
5943 apparently automatically emit some of the necessary externals. This
5945 handles these versions in order to eliminate generation warnings.
5947 Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
5949 Disassembler: Add support to decode _PLD buffers. The decoded buffer
5951 within comments in the output file.
5953 Debugger: Fixed a regression with the "Threads" command where
5954 AE_BAD_PARAMETER was always returned.
5956 ----------------------------------------
5957 11 July 2012. Summary of changes for version 20120711:
5959 1) ACPICA Kernel-resident Subsystem:
5961 Fixed a possible fault in the return package object repair code. Fixes a
5962 problem that can occur when a lone package object is wrapped with an
5964 package object in order to force conformance to the ACPI specification.
5966 affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
5970 Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
5971 PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
5972 ARB_DIS bit must be implemented in the host-dependent C3 processor power
5974 support. Note, ARB_DIS is obsolete and only applies to older chipsets,
5976 Intel and other vendors. (for Intel: ICH4-M and earlier)
5978 This change removes the code to disable/enable bus master arbitration
5980 suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
5982 resume problems on some machines. The change has been in use for over
5986 Implemented two new external interfaces to support host-directed dynamic
5988 table load and unload. They are intended to simplify the host
5990 of hot-plug support:
5991 AcpiLoadTable: Load an SSDT from a buffer into the namespace.
5992 AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
5994 See the ACPICA reference for additional details. Adds one new file,
5995 components/tables/tbxfload.c
5997 Implemented and deployed two new interfaces for errors and warnings that
5999 known to be caused by BIOS/firmware issues:
6000 AcpiBiosError: Prints "ACPI Firmware Error" message.
6001 AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
6002 Deployed these new interfaces in the ACPICA Table Manager code for ACPI
6004 and FADT errors. Additional deployment to be completed as appropriate in
6006 future. The associated conditional macros are ACPI_BIOS_ERROR and
6007 ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
6012 Implicit notify support: ensure that no memory allocation occurs within a
6013 critical region. This fix moves a memory allocation outside of the time
6015 spinlock is held. Fixes issues on systems that do not allow this
6019 Split exception code utilities and tables into a new file,
6022 Example Code and Data Size: These are the sizes for the OS-independent
6023 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6025 version of the code includes the debug output trace mechanism and has a
6027 larger code and data size.
6030 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
6031 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
6033 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
6034 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
6037 2) iASL Compiler/Disassembler and Tools:
6039 iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
6043 Debugger: Enhanced the "tables" command to emit additional information
6045 the current set of ACPI tables, including the owner ID and flags decode.
6047 Debugger: Reimplemented the "unload" command to use the new
6048 AcpiUnloadParentTable external interface. This command was disable
6050 due to need for an unload interface.
6052 AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
6054 will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
6056 ----------------------------------------
6057 20 June 2012. Summary of changes for version 20120620:
6060 1) ACPICA Kernel-resident Subsystem:
6062 Implemented support to expand the "implicit notify" feature to allow
6064 devices to be notified by a single GPE. This feature automatically
6066 runtime device notification in the absence of a BIOS-provided GPE control
6067 method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
6069 provided by ACPICA for Windows compatibility, and is a workaround for
6072 code errors. See the description of the AcpiSetupGpeForWake interface in
6074 APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
6076 Changed some comments and internal function names to simplify and ensure
6077 correctness of the Linux code translation. No functional changes.
6079 Example Code and Data Size: These are the sizes for the OS-independent
6080 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6082 version of the code includes the debug output trace mechanism and has a
6084 larger code and data size.
6087 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
6088 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
6090 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
6091 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
6094 2) iASL Compiler/Disassembler and Tools:
6096 Disassembler: Added support to emit short, commented descriptions for the
6098 predefined names in order to improve the readability of the disassembled
6099 output. ACPICA BZ 959. Changes include:
6100 1) Emit descriptions for all standard predefined names (_INI, _STA,
6103 2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
6104 3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
6107 AcpiSrc: Fixed several long-standing Linux code translation issues.
6109 descriptions in function headers are now translated properly to lower
6112 underscores. ACPICA BZ 961. Also fixes translation problems such as
6118 local_fADT -> local_FADT
6119 execute_oSI -> execute_OSI
6121 iASL: Fixed a problem where null bytes were inadvertently emitted into
6125 iASL: Added the existing debug options to the standard help screen. There
6127 no longer two different help screens. ACPICA BZ 957.
6129 AcpiHelp: Fixed some typos in the various predefined name descriptions.
6131 expand some of the descriptions where appropriate.
6133 iASL: Fixed the -ot option (display compile times/statistics). Was not
6135 properly for standard output; only worked for the debug file case.
6137 ----------------------------------------
6138 18 May 2012. Summary of changes for version 20120518:
6141 1) ACPICA Core Subsystem:
6143 Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
6145 to block until asynchronous events such as notifies and GPEs have
6147 Within ACPICA, it is only called before a notify or GPE handler is
6148 removed/uninstalled. It also may be useful for the host OS within related
6149 drivers such as the Embedded Controller driver. See the ACPICA reference
6151 additional information. ACPICA BZ 868.
6153 ACPI Tables: Added a new error message for a possible overflow failure
6155 the conversion of FADT 32-bit legacy register addresses to internal
6158 bit GAS structure representation. The GAS has a one-byte "bit length"
6160 thus limiting the register length to 255 bits. ACPICA BZ 953.
6162 Example Code and Data Size: These are the sizes for the OS-independent
6163 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6165 version of the code includes the debug output trace mechanism and has a
6167 larger code and data size.
6170 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
6171 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
6173 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
6174 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
6177 2) iASL Compiler/Disassembler and Tools:
6179 iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
6181 This keyword was added late in the ACPI 5.0 release cycle and was not
6182 implemented until now.
6184 Disassembler: Added support for Operation Region externals. Adds missing
6185 support for operation regions that are defined in another table, and
6186 referenced locally via a Field or BankField ASL operator. Now generates
6188 correct External statement.
6190 Disassembler: Several additional fixes for the External() statement
6192 related to some ASL operators. Also, order the External() statements
6193 alphabetically in the disassembler output. Fixes the External()
6196 the Create* field, Alias, and Scope operators:
6197 1) Create* buffer field operators - fix type mismatch warning on
6199 2) Alias - implement missing External support
6200 3) Scope - fix to make sure all necessary externals are emitted.
6202 iASL: Improved pathname support. For include files, merge the prefix
6204 with the file pathname and eliminate unnecessary components. Convert
6205 backslashes in all pathnames to forward slashes, for readability. Include
6207 pathname changes affect both #include and Include() type operators.
6209 iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
6211 of a valid line by inserting a newline and then returning the EOF during
6213 next call to GetNextLine. Prevents the line from being ignored due to EOF
6216 iASL: Implemented some changes to enhance the IDE support (-vi option.)
6218 and Warning messages are now correctly recognized for both the source
6220 browser and the global error and warning counts.
6222 ----------------------------------------
6223 20 April 2012. Summary of changes for version 20120420:
6226 1) ACPICA Core Subsystem:
6228 Implemented support for multiple notify handlers. This change adds
6231 allow multiple system and device notify handlers on Device, Thermal Zone,
6233 Processor objects. This can simplify the host OS notification
6235 Also re-worked and restructured the entire notify support code to
6237 handler installation, handler removal, notify event queuing, and notify
6238 dispatch to handler(s). Note: there can still only be two global notify
6239 handlers - one for system notifies and one for device notifies. There are
6241 changes to the existing handler install/remove interfaces. Lin Ming, Bob
6242 Moore, Rafael Wysocki.
6244 Fixed a regression in the package repair code where the object reference
6245 count was calculated incorrectly. Regression was introduced in the commit
6246 "Support to add Package wrappers".
6248 Fixed a couple possible memory leaks in the AML parser, in the error
6250 path. Jesper Juhl, Lin Ming.
6252 Example Code and Data Size: These are the sizes for the OS-independent
6253 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6254 debug version of the code includes the debug output trace mechanism and
6256 much larger code and data size.
6259 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
6260 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
6262 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
6263 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
6266 2) iASL Compiler/Disassembler and Tools:
6268 iASL: Fixed a problem with the resource descriptor support where the
6270 of the StartDependentFn and StartDependentFnNoPrio descriptors were not
6271 included in cumulative descriptor offset, resulting in incorrect values
6273 resource tags within resource descriptors appearing after a
6275 descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
6277 iASL and Preprocessor: Implemented full support for the #line directive
6279 correctly track original source file line numbers through the .i
6281 output file - for error and warning messages.
6283 iASL: Expand the allowable byte constants for address space IDs.
6285 the allowable range was 0x80-0xFF (user-defined spaces), now the range is
6286 0x0A-0xFF to allow for custom and new IDs without changing the compiler.
6288 iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
6290 iASL: Add option to completely disable the preprocessor (-Pn).
6292 iASL: Now emit all error/warning messages to standard error (stderr) by
6293 default (instead of the previous stdout).
6295 ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
6297 for resource descriptor offset fix above. Update/cleanup error output
6298 routines. Enable and send iASL errors/warnings to an error logfile
6299 (error.txt). Send all other iASL output to a logfile (compiler.txt).
6301 several extraneous "unrecognized operator" messages.
6303 ----------------------------------------
6304 20 March 2012. Summary of changes for version 20120320:
6307 1) ACPICA Core Subsystem:
6309 Enhanced the sleep/wake interfaces to optionally execute the _GTS method
6310 (Going To Sleep) and the _BFS method (Back From Sleep). Windows
6312 does not execute these methods, and therefore these methods are often
6313 untested. It has been seen on some systems where the execution of these
6314 methods causes errors and also prevents the machine from entering S5. It
6316 therefore suggested that host operating systems do not execute these
6318 by default. In the future, perhaps these methods can be optionally
6320 based on the age of the system and/or what is the newest version of
6322 that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
6324 AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
6327 Fixed a problem where the length of the local/common FADT was set too
6329 The local FADT table length cannot be set to the common length until the
6330 original length has been examined. There is code that checks the table
6332 and sets various fields appropriately. This can affect older machines
6334 early FADT versions. For example, this can cause inadvertent writes to
6336 CST_CNT register. Julian Anastasov.
6338 Fixed a mapping issue related to a physical table override. Use the
6340 mapping mechanism for tables loaded via the physical override OSL
6342 This allows for early mapping before the virtual memory manager is
6344 Thomas Renninger, Bob Moore.
6346 Enhanced the automatic return-object repair code: Repair a common problem
6348 predefined methods that are defined to return a variable-length Package
6350 sub-objects. If there is only one sub-object, some BIOS ASL code
6352 simply returns the single object instead of a Package with one sub-
6354 This new support will repair this error by wrapping a Package object
6356 the original object, creating the correct and expected Package with one
6358 object. Names that can be repaired in this manner include: _ALR, _CSD,
6360 _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
6363 Changed the exception code returned for invalid ACPI paths passed as
6364 parameters to external interfaces such as AcpiEvaluateObject. Was
6365 AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
6367 Example Code and Data Size: These are the sizes for the OS-independent
6368 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6370 version of the code includes the debug output trace mechanism and has a
6372 larger code and data size.
6375 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
6376 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
6378 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
6379 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
6382 2) iASL Compiler/Disassembler and Tools:
6384 iASL: Added the infrastructure and initial implementation of a integrated
6386 like preprocessor. This will simplify BIOS development process by
6388 the need for a separate preprocessing step during builds. On Windows, it
6390 eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
6391 features including full #define() macro support are still under
6393 These preprocessor directives are supported:
6406 In addition, these new command line options are supported:
6407 -D <symbol> Define symbol for preprocessor use
6408 -li Create preprocessed output file (*.i)
6409 -P Preprocess only and create preprocessor output file (*.i)
6411 Table Compiler: Fixed a problem where the equals operator within an
6413 did not work properly.
6415 Updated iASL to use the current versions of Bison/Flex. Updated the
6417 project file to invoke these tools from the standard location. ACPICA BZ
6420 Flex for Windows: V2.5.4
6421 Bison for Windows: V2.4.1
6423 ----------------------------------------
6424 15 February 2012. Summary of changes for version 20120215:
6427 1) ACPICA Core Subsystem:
6429 There have been some major changes to the sleep/wake support code, as
6430 described below (a - e).
6432 a) The AcpiLeaveSleepState has been split into two interfaces, similar to
6433 AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
6434 AcpiLeaveSleepStatePrep. This allows the host to perform actions between
6436 time the _BFS method is called and the _WAK method is called. NOTE: all
6438 must update their wake/resume code or else sleep/wake will not work
6442 b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
6444 method. Some machines require that the GPEs are enabled before the _WAK
6446 is executed. Thomas Renninger.
6448 c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
6450 Some BIOS code assumes that WAK_STS will be cleared on resume and use it
6452 determine whether the system is rebooting or resuming. Matthew Garrett.
6454 d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
6456 match the ACPI specification requirement. Rafael Wysocki.
6458 e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
6459 registers within the V5 FADT. This support adds two new files:
6460 hardware/hwesleep.c implements the support for the new registers. Moved
6462 sleep/wake external interfaces to hardware/hwxfsleep.c.
6465 Added a new OSL interface for ACPI table overrides,
6466 AcpiOsPhysicalTableOverride. This interface allows the host to override a
6467 table via a physical address, instead of the logical address required by
6468 AcpiOsTableOverride. This simplifies the host implementation. Initial
6469 implementation by Thomas Renninger. The ACPICA implementation creates a
6471 shared function for table overrides that attempts both a logical and a
6474 Expanded the OSL memory read/write interfaces to 64-bit data
6475 (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
6476 transfer support for GAS register structures passed to AcpiRead and
6479 Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
6481 build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
6483 See the ACPICA reference for details. ACPICA BZ 942. This option removes
6485 10% of the code and 5% of the static data, and the following hardware
6487 features become unavailable:
6488 PM Event and Control registers
6489 SCI interrupt (and handler)
6491 General Purpose Events (GPEs)
6494 FACS table (Waking vectors and Global Lock)
6496 Updated the unix tarball directory structure to match the ACPICA git
6498 tree. This ensures that the generic unix makefiles work properly (in
6499 generate/unix). Also updated the Linux makefiles to match. ACPICA BZ
6502 Updated the return value of the _REV predefined method to integer value 5
6504 reflect ACPI 5.0 support.
6506 Moved the external ACPI PM timer interface prototypes to the public
6508 file where they belong.
6510 Example Code and Data Size: These are the sizes for the OS-independent
6511 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6513 version of the code includes the debug output trace mechanism and has a
6515 larger code and data size.
6518 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
6519 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
6521 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
6522 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
6525 2) iASL Compiler/Disassembler and Tools:
6527 Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
6528 descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
6529 incorrectly displayed.
6531 AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
6534 ----------------------------------------
6535 11 January 2012. Summary of changes for version 20120111:
6538 1) ACPICA Core Subsystem:
6540 Implemented a new mechanism to allow host device drivers to check for
6542 range conflicts with ACPI Operation Regions. Both SystemMemory and
6544 address spaces are supported. A new external interface,
6545 AcpiCheckAddressRange,
6546 allows drivers to check an address range against the ACPI namespace. See
6548 ACPICA reference for additional details. Adds one new file,
6549 utilities/utaddress.c. Lin Ming, Bob Moore.
6551 Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
6554 Status registers, update the ACPI 5.0 flags, and update internal data
6555 structures to handle an FADT larger than 256 bytes. The size of the ACPI
6559 Updated all ACPICA copyrights and signons to 2012. Added the 2012
6561 all module headers and signons, including the standard Linux header. This
6562 affects virtually every file in the ACPICA core subsystem, iASL compiler,
6564 all ACPICA utilities.
6566 Example Code and Data Size: These are the sizes for the OS-independent
6567 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6569 version of the code includes the debug output trace mechanism and has a
6571 larger code and data size.
6574 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
6575 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
6577 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
6578 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
6581 2) iASL Compiler/Disassembler and Tools:
6583 Disassembler: fixed a problem with the automatic resource tag generation
6584 support. Fixes a problem where the resource tags are inadvertently not
6585 constructed if the table being disassembled contains external references
6587 control methods. Moved the actual construction of the tags to after the
6589 namespace is constructed (after 2nd parse is invoked due to external
6591 method references.) ACPICA BZ 941.
6593 Table Compiler: Make all "generic" operators caseless. These are the
6595 like UINT8, String, etc. Making these caseless improves ease-of-use.
6599 ----------------------------------------
6600 23 November 2011. Summary of changes for version 20111123:
6602 0) ACPI 5.0 Support:
6604 This release contains full support for the ACPI 5.0 specification, as
6607 Reduced Hardware Support:
6608 -------------------------
6610 This support allows for ACPI systems without the usual ACPI hardware.
6612 support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
6614 not attempt to initialize or use any of the usual ACPI hardware. Note,
6616 this flag is set, all of the following ACPI hardware is assumed to be not
6617 present and is not initialized or accessed:
6619 General Purpose Events (GPEs)
6620 Fixed Events (PM1a/PM1b and PM Control)
6621 Power Management Timer and Console Buttons (power/sleep)
6622 Real-time Clock Alarm
6624 System Control Interrupt (SCI)
6625 The FACS is assumed to be non-existent
6630 All new tables and updates to existing tables are fully supported in the
6631 ACPICA headers (for use by device drivers), the disassembler, and the
6633 Data Table Compiler. ACPI 5.0 defines these new tables:
6635 BGRT /* Boot Graphics Resource Table */
6636 DRTM /* Dynamic Root of Trust for Measurement table */
6637 FPDT /* Firmware Performance Data Table */
6638 GTDT /* Generic Timer Description Table */
6639 MPST /* Memory Power State Table */
6640 PCCT /* Platform Communications Channel Table */
6641 PMTT /* Platform Memory Topology Table */
6642 RASF /* RAS Feature table */
6644 Operation Regions/SpaceIDs:
6645 ---------------------------
6647 All new operation regions are fully supported by the iASL compiler, the
6648 disassembler, and the ACPICA runtime code (for dispatch to region
6650 The new operation region Space IDs are:
6655 Resource Descriptors:
6656 ---------------------
6658 All new ASL resource descriptors are fully supported by the iASL
6661 ASL/AML disassembler, and the ACPICA runtime Resource Manager code
6663 all new predefined resource tags). New descriptors are:
6672 ASL/AML Operators, New and Modified:
6673 ------------------------------------
6675 One new operator is added, the Connection operator, which is used to
6677 a GeneralPurposeIo or GenericSerialBus resource descriptor with
6679 field objects within an operation region. Several new protocols are
6681 with the AccessAs operator. All are fully supported by the iASL compiler,
6682 disassembler, and runtime ACPICA AML interpreter:
6684 Connection // Declare Field Connection
6686 AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol
6687 AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes
6689 AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
6690 RawDataBuffer // Data type for Vendor Data
6693 Predefined ASL/AML Objects:
6694 ---------------------------
6696 All new predefined objects/control-methods are supported by the iASL
6698 and the ACPICA runtime validation/repair (arguments and return values.)
6700 predefined names include the following:
6702 Standard Predefined Names (Objects or Control Methods):
6703 _AEI, _CLS, _CPC, _CWS, _DEP,
6704 _DLM, _EVT, _GCP, _CRT, _GWS,
6705 _HRV, _PRE, _PSE, _SRT, _SUB.
6707 Resource Tags (Names used to access individual fields within resource
6709 _DBT, _DPL, _DRS, _END, _FLC,
6710 _IOR, _LIN, _MOD, _PAR, _PHA,
6711 _PIN, _PPI, _POL, _RXL, _SLV,
6712 _SPE, _STB, _TXL, _VEN.
6714 ACPICA External Interfaces:
6715 ---------------------------
6717 Several new interfaces have been defined for use by ACPI-related device
6718 drivers and other host OS services:
6720 AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
6722 acquire and release AML mutexes that are defined in the DSDT/SSDT tables
6723 provided by the BIOS. They are intended to be used in conjunction with
6725 ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
6726 mutual exclusion with the AML code/interpreter.
6728 AcpiGetEventResources: Returns the (formatted) resource descriptors as
6730 by the ACPI 5.0 _AEI object (ACPI Event Information). This object
6732 resource descriptors associated with hardware-reduced platform events,
6734 to the AcpiGetCurrentResources interface.
6736 Operation Region Handlers: For General Purpose IO and Generic Serial Bus
6737 operation regions, information about the Connection() object and any
6739 length information is passed to the region handler within the Context
6742 AcpiBufferToResource: This interface converts a raw AML buffer containing
6744 resource template or resource descriptor to the ACPI_RESOURCE internal
6746 suitable for use by device drivers. Can be used by an operation region
6748 to convert the Connection() buffer object into a ACPI_RESOURCE.
6750 Miscellaneous/Tools/TestSuites:
6751 -------------------------------
6753 Support for extended _HID names (Four alpha characters instead of three).
6754 Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
6755 Support for ACPI 5.0 features in the ASLTS test suite.
6756 Fully updated documentation (ACPICA and iASL reference documents.)
6758 ACPI Table Definition Language:
6759 -------------------------------
6761 Support for this language was implemented and released as a subsystem of
6763 iASL compiler in 2010. (See the iASL compiler User Guide.)
6766 Non-ACPI 5.0 changes for this release:
6767 --------------------------------------
6769 1) ACPICA Core Subsystem:
6771 Fix a problem with operation region declarations where a failure can
6774 the region name and an argument that evaluates to an object (such as the
6775 region address) are in different namespace scopes. Lin Ming, ACPICA BZ
6778 Do not abort an ACPI table load if an invalid space ID is found within.
6780 will be caught later if the offending method is executed. ACPICA BZ 925.
6782 Fixed an issue with the FFixedHW space ID where the ID was not always
6783 recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
6785 Fixed a problem with the 32-bit generation of the unix-specific OSL
6786 (osunixxf.c). Lin Ming, ACPICA BZ 936.
6788 Several changes made to enable generation with the GCC 4.6 compiler.
6792 New error messages: Unsupported I/O requests (not 8/16/32 bit), and
6794 field registers out-of-range.
6796 2) iASL Compiler/Disassembler and Tools:
6798 iASL: Implemented the __PATH__ operator, which returns the full pathname
6800 the current source file.
6802 AcpiHelp: Automatically display expanded keyword information for all ASL
6805 Debugger: Add "Template" command to disassemble/dump resource template
6808 Added a new master script to generate and execute the ASLTS test suite.
6809 Automatically handles 32- and 64-bit generation. See tests/aslts.sh
6811 iASL: Fix problem with listing generation during processing of the
6813 operator where AML listing was disabled until the entire Switch block was
6816 iASL: Improve support for semicolon statement terminators. Fix "invalid
6817 character" message for some cases when the semicolon is used. Semicolons
6819 now allowed after every <Term> grammar element. ACPICA BZ 927.
6821 iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
6824 Disassembler: Fix problem with disassembly of the DataTableRegion
6826 where an inadvertent "Unhandled deferred opcode" message could be
6829 3) Example Code and Data Size
6831 These are the sizes for the OS-independent acpica.lib produced by the
6832 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
6833 includes the debug output trace mechanism and has a much larger code and
6838 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6839 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6841 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
6842 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
6844 ----------------------------------------
6845 22 September 2011. Summary of changes for version 20110922:
6849 Support for ACPI 5.0 in ACPICA has been underway for several months and
6851 be released at the same time that ACPI 5.0 is officially released.
6853 The ACPI 5.0 specification is on track for release in the next few
6856 1) ACPICA Core Subsystem:
6858 Fixed a problem where the maximum sleep time for the Sleep() operator was
6859 intended to be limited to two seconds, but was inadvertently limited to
6863 Linux and Unix makefiles: Added header file dependencies to ensure
6865 generation of ACPICA core code and utilities. Also simplified the
6867 considerably through the use of the vpath variable to specify search
6871 2) iASL Compiler/Disassembler and Tools:
6873 iASL: Implemented support to check the access length for all fields
6875 access named Resource Descriptor fields. For example, if a resource field
6877 defined to be two bits, a warning is issued if a CreateXxxxField() is
6879 with an incorrect bit length. This is implemented for all current
6881 descriptor names. ACPICA BZ 930.
6883 Disassembler: Fixed a byte ordering problem with the output of 24-bit and
6887 iASL: Fixed a couple of issues associated with variable-length package
6888 objects. 1) properly handle constants like One, Ones, Zero -- do not make
6890 VAR_PACKAGE when these are used as a package length. 2) Allow the
6892 opcode (in addition to PACKAGE) when validating object types for
6896 iASL: Emit statistics for all output files (instead of just the ASL input
6898 AML output). Includes listings, hex files, etc.
6900 iASL: Added -G option to the table compiler to allow the compilation of
6902 ACPI tables. The only part of a table that is required is the standard
6907 AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
6909 which also adds correct 64-bit support. Also, now all output filenames
6911 completely lower case.
6913 AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
6914 loading table files. A warning is issued for any such tables. The only
6915 exception is an FADT. This also fixes a possible fault when attempting to
6917 non-AML tables. ACPICA BZ 932.
6919 AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
6921 missing table terminator could cause a fault when using the -p option.
6923 AcpiSrc: Fixed a possible divide-by-zero fault when generating file
6926 3) Example Code and Data Size
6928 These are the sizes for the OS-independent acpica.lib produced by the
6929 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
6930 includes the debug output trace mechanism and has a much larger code and
6934 Previous Release (VC 9.0):
6935 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6936 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6937 Current Release (VC 9.0):
6938 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6939 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6942 ----------------------------------------
6943 23 June 2011. Summary of changes for version 20110623:
6945 1) ACPI CA Core Subsystem:
6947 Updated the predefined name repair mechanism to not attempt repair of a
6949 return object if a _PSS object is present. We can only sort the _TSS
6951 package if there is no _PSS within the same scope. This is because if
6954 present, the ACPI specification dictates that the _TSS Power Dissipation
6956 is to be ignored, and therefore some BIOSs leave garbage values in the
6958 Power field(s). In this case, it is best to just return the _TSS package
6960 is. Reported by, and fixed with assistance from Fenghua Yu.
6962 Added an option to globally disable the control method return value
6964 and repair. This runtime option can be used to disable return value
6967 this is causing a problem on a particular machine. Also added an option
6969 AcpiExec (-dr) to set this disable flag.
6971 All makefiles and project files: Major changes to improve generation of
6973 tools. ACPICA BZ 912:
6974 Reduce default optimization levels to improve compatibility
6975 For Linux, add strict-aliasing=0 for gcc 4
6976 Cleanup and simplify use of command line defines
6977 Cleanup multithread library support
6978 Improve usage messages
6980 Linux-specific header: update handling of THREAD_ID and pthread. For the
6982 bit case, improve casting to eliminate possible warnings, especially with
6986 Example Code and Data Size: These are the sizes for the OS-independent
6987 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6989 version of the code includes the debug output trace mechanism and has a
6991 larger code and data size.
6993 Previous Release (VC 9.0):
6994 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
6995 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6996 Current Release (VC 9.0):
6997 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6998 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
7000 2) iASL Compiler/Disassembler and Tools:
7002 With this release, a new utility named "acpihelp" has been added to the
7004 package. This utility summarizes the ACPI specification chapters for the
7006 and AML languages. It generates under Linux/Unix as well as Windows, and
7007 provides the following functionality:
7008 Find/display ASL operator(s) -- with description and syntax.
7009 Find/display ASL keyword(s) -- with exact spelling and descriptions.
7010 Find/display ACPI predefined name(s) -- with description, number
7011 of arguments, and the return value data type.
7012 Find/display AML opcode name(s) -- with opcode, arguments, and
7014 Decode/display AML opcode -- with opcode name, arguments, and
7017 Service Layers: Make multi-thread support configurable. Conditionally
7019 the multi-thread support so that threading libraries will not be linked
7022 necessary. The only tool that requires multi-thread support is AcpiExec.
7024 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
7026 Bison appear to want the interface to yyerror to be a const char * (or at
7027 least this is a problem when generating iASL on some systems.) ACPICA BZ
7031 Tools: Fix for systems where O_BINARY is not defined. Only used for
7033 versions of the tools.
7035 ----------------------------------------
7036 27 May 2011. Summary of changes for version 20110527:
7038 1) ACPI CA Core Subsystem:
7040 ASL Load() operator: Reinstate most restrictions on the incoming ACPI
7042 signature. Now, only allow SSDT, OEMx, and a null signature. History:
7043 1) Originally, we checked the table signature for "SSDT" or "PSDT".
7044 (PSDT is now obsolete.)
7045 2) We added support for OEMx tables, signature "OEM" plus a fourth
7046 "don't care" character.
7047 3) Valid tables were encountered with a null signature, so we just
7048 gave up on validating the signature, (05/2008).
7049 4) We encountered non-AML tables such as the MADT, which caused
7050 interpreter errors and kernel faults. So now, we once again allow
7051 only SSDT, OEMx, and now, also a null signature. (05/2011).
7053 Added the missing _TDL predefined name to the global name list in order
7055 enable validation. Affects both the core ACPICA code and the iASL
7058 Example Code and Data Size: These are the sizes for the OS-independent
7059 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
7061 version of the code includes the debug output trace mechanism and has a
7063 larger code and data size.
7065 Previous Release (VC 9.0):
7066 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
7067 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
7068 Current Release (VC 9.0):
7069 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
7070 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
7072 2) iASL Compiler/Disassembler and Tools:
7074 Debugger/AcpiExec: Implemented support for "complex" method arguments on
7076 debugger command line. This adds support beyond simple integers --
7078 Strings, Buffers, and Packages. Includes support for nested packages.
7079 Increased the default command line buffer size to accommodate these
7081 See the ACPICA reference for details and syntax. ACPICA BZ 917.
7083 Debugger/AcpiExec: Implemented support for "default" method arguments for
7085 Execute/Debug command. Now, the debugger will always invoke a control
7087 with the required number of arguments -- even if the command line
7089 none or insufficient arguments. It uses default integer values for any
7091 arguments. Also fixes a bug where only six method arguments maximum were
7092 supported instead of the required seven.
7094 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
7096 also return status in order to prevent buffer overruns. See the ACPICA
7097 reference for details and syntax. ACPICA BZ 921
7099 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
7100 makefiles to simplify support for the two different but similar parser
7101 generators, bison and yacc.
7103 Updated the generic unix makefile for gcc 4. The default gcc version is
7105 expected to be 4 or greater, since options specific to gcc 4 are used.
7107 ----------------------------------------
7108 13 April 2011. Summary of changes for version 20110413:
7110 1) ACPI CA Core Subsystem:
7112 Implemented support to execute a so-called "orphan" _REG method under the
7114 device. This change will force the execution of a _REG method underneath
7117 device even if there is no corresponding operation region of type
7118 EmbeddedControl. Fixes a problem seen on some machines and apparently is
7119 compatible with Windows behavior. ACPICA BZ 875.
7121 Added more predefined methods that are eligible for automatic NULL
7123 element removal. This change adds another group of predefined names to
7126 of names that can be repaired by having NULL package elements dynamically
7127 removed. This group are those methods that return a single variable-
7129 package containing simple data types such as integers, buffers, strings.
7131 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
7134 and _TZD. ACPICA BZ 914.
7136 Split and segregated all internal global lock functions to a new file,
7139 Updated internal address SpaceID for DataTable regions. Moved this
7142 id in preparation for ACPI 5.0 changes that will include some new space
7145 change should not affect user/host code.
7147 Example Code and Data Size: These are the sizes for the OS-independent
7149 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
7151 the code includes the debug output trace mechanism and has a much larger
7156 Previous Release (VC 9.0):
7157 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
7158 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
7159 Current Release (VC 9.0):
7160 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
7161 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
7163 2) iASL Compiler/Disassembler and Tools:
7165 iASL/DTC: Major update for new grammar features. Allow generic data types
7167 custom ACPI tables. Field names are now optional. Any line can be split
7169 multiple lines using the continuation char (\). Large buffers now use
7171 continuation character(s) and no colon on the continuation lines. See the
7173 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
7176 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
7178 Since the parser stuffs a "zero" as the return value for these statements
7181 the underlying AML grammar), they were seen as "return with value" by the
7183 semantic checking. They are now seen correctly as "null" return
7186 iASL: Check if a_REG declaration has a corresponding Operation Region.
7188 check for each _REG to ensure that there is in fact a corresponding
7190 region declaration in the same scope. If not, the _REG method is not very
7192 since it probably won't be executed. ACPICA BZ 915.
7194 iASL/DTC: Finish support for expression evaluation. Added a new
7197 that implements c-style operator precedence and parenthesization. ACPICA
7201 Disassembler/DTC: Remove support for () and <> style comments in data
7204 that DTC has full expression support, we don't want to have comment
7207 start with a parentheses or a less-than symbol. Now, only the standard /*
7210 comments are supported, as well as the bracket [] comments.
7212 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
7214 headers in the acpidump file. Update the header validation to support
7216 tables. Problem introduced in previous AcpiXtract version in the change
7218 support "wrong checksum" error messages emitted by acpidump utility.
7220 iASL: Add a * option to generate all template files (as a synonym for
7224 "iasl -T *" or "iasl -T ALL".
7226 iASL/DTC: Do not abort compiler on fatal errors. We do not want to
7228 abort the compiler on "fatal" errors, simply should abort the current
7230 This allows multiple compiles with a single (possibly wildcard) compiler
7233 ----------------------------------------
7234 16 March 2011. Summary of changes for version 20110316:
7236 1) ACPI CA Core Subsystem:
7238 Fixed a problem caused by a _PRW method appearing at the namespace root
7240 during the setup of wake GPEs. A fault could occur if a _PRW directly
7243 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
7245 Implemented support for "spurious" Global Lock interrupts. On some
7247 global lock interrupt can occur without the pending flag being set. Upon
7250 interrupt, we now ensure that a thread is actually waiting for the lock
7252 signaling GL availability. Rafael Wysocki, Bob Moore.
7254 Example Code and Data Size: These are the sizes for the OS-independent
7256 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
7258 the code includes the debug output trace mechanism and has a much larger
7263 Previous Release (VC 9.0):
7264 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
7265 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
7266 Current Release (VC 9.0):
7267 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
7268 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
7270 2) iASL Compiler/Disassembler and Tools:
7272 Implemented full support for the "SLIC" ACPI table. Includes support in
7274 header files, disassembler, table compiler, and template generator. Bob
7278 AcpiXtract: Correctly handle embedded comments and messages from
7280 Apparently some or all versions of acpidump will occasionally emit a
7283 "Wrong checksum", etc., into the dump file. This was causing problems for
7284 AcpiXtract. ACPICA BZ 905.
7286 iASL: Fix the Linux makefile by removing an inadvertent double file
7290 AcpiExec: Update installation of operation region handlers. Install one
7292 for a user-defined address space. This is used by the ASL test suite
7295 ----------------------------------------
7296 11 February 2011. Summary of changes for version 20110211:
7298 1) ACPI CA Core Subsystem:
7300 Added a mechanism to defer _REG methods for some early-installed
7302 Most user handlers should be installed before call to
7303 AcpiEnableSubsystem.
7304 However, Event handlers and region handlers should be installed after
7305 AcpiInitializeObjects. Override handlers for the "default" regions should
7307 installed early, however. This change executes all _REG methods for the
7308 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
7309 chicken/egg issues between them. ACPICA BZ 848.
7311 Implemented an optimization for GPE detection. This optimization will
7313 ignore GPE registers that contain no enabled GPEs -- there is no need to
7314 read the register since this information is available internally. This
7315 becomes more important on machines with a large GPE space. ACPICA
7317 884. Lin Ming. Suggestion from Joe Liu.
7319 Removed all use of the highly unreliable FADT revision field. The
7321 number in the FADT has been found to be completely unreliable and cannot
7323 trusted. Only the actual table length can be used to infer the version.
7325 change updates the ACPICA core and the disassembler so that both no
7327 even look at the FADT version and instead depend solely upon the FADT
7330 Fix an unresolved name issue for the no-debug and no-error-message source
7331 generation cases. The _AcpiModuleName was left undefined in these cases,
7333 it is actually needed as a parameter to some interfaces. Define
7334 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
7336 Split several large files (makefiles and project files updated)
7337 utglobal.c -> utdecode.c
7338 dbcomds.c -> dbmethod.c dbnames.c
7339 dsopcode.c -> dsargs.c dscontrol.c
7340 dsload.c -> dsload2.c
7341 aslanalyze.c -> aslbtypes.c aslwalks.c
7343 Example Code and Data Size: These are the sizes for the OS-independent
7344 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
7345 debug version of the code includes the debug output trace mechanism and
7347 a much larger code and data size.
7349 Previous Release (VC 9.0):
7350 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
7351 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
7352 Current Release (VC 9.0):
7353 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
7354 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
7356 2) iASL Compiler/Disassembler and Tools:
7358 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
7359 These are useful C-style macros with the standard definitions. ACPICA
7362 iASL/DTC: Added support for integer expressions and labels. Support for
7364 expressions for all integer fields in all ACPI tables. Support for labels
7366 "generic" portions of tables such as UEFI. See the iASL reference manual.
7368 Debugger: Added a command to display the status of global handlers. The
7369 "handlers" command will display op region, fixed event, and miscellaneous
7370 global handlers. installation status -- and for op regions, whether
7372 or user-installed handler will be used.
7374 iASL: Warn if reserved method incorrectly returns a value. Many
7376 names are defined such that they do not return a value. If implemented as
7378 method, issue a warning if such a name explicitly returns a value. ACPICA
7381 iASL: Added detection of GPE method name conflicts. Detects a conflict
7383 there are two GPE methods of the form _Lxy and _Exy in the same scope.
7385 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
7387 iASL/DTC: Fixed a couple input scanner issues with comments and line
7388 numbers. Comment remover could get confused and miss a comment ending.
7390 a problem with line counter maintenance.
7392 iASL/DTC: Reduced the severity of some errors from fatal to error. There
7394 no need to abort on simple errors within a field definition.
7396 Debugger: Simplified the output of the help command. All help output now
7398 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
7400 ----------------------------------------
7401 12 January 2011. Summary of changes for version 20110112:
7403 1) ACPI CA Core Subsystem:
7405 Fixed a race condition between method execution and namespace walks that
7407 possibly cause a fault. The problem was apparently introduced in version
7408 20100528 as a result of a performance optimization that reduces the
7411 namespace walks upon method exit by using the delete_namespace_subtree
7412 function instead of the delete_namespace_by_owner function used
7414 Bug is a missing namespace lock in the delete_namespace_subtree function.
7415 dana.myers@oracle.com
7417 Fixed several issues and a possible fault with the automatic "serialized"
7418 method support. History: This support changes a method to "serialized" on
7420 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
7421 possibility that it cannot handle reentrancy. This fix repairs a couple
7423 issues seen in the field, especially on machines with many cores:
7425 1) Delete method children only upon the exit of the last thread,
7426 so as to not delete objects out from under other running threads
7427 (and possibly causing a fault.)
7428 2) Set the "serialized" bit for the method only upon the exit of the
7429 Last thread, so as to not cause deadlock when running threads
7431 3) Cleanup the use of the AML "MethodFlags" and internal method flags
7432 so that there is no longer any confusion between the two.
7434 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
7436 Debugger: Now lock the namespace for duration of a namespace dump.
7438 issues if the namespace is changing dynamically underneath the debugger.
7439 Especially affects temporary namespace nodes, since the debugger displays
7442 Updated the ordering of include files. The ACPICA headers should appear
7443 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
7445 any necessary compiler-specific defines, etc. Affects the ACPI-related
7449 Updated all ACPICA copyrights and signons to 2011. Added the 2011
7451 to all module headers and signons, including the Linux header. This
7453 virtually every file in the ACPICA core subsystem, iASL compiler, and all
7456 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
7457 project files for VC++ 6.0 are now obsolete. New project files can be
7459 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
7462 Example Code and Data Size: These are the sizes for the OS-independent
7463 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
7464 debug version of the code includes the debug output trace mechanism and
7466 much larger code and data size.
7468 Previous Release (VC 6.0):
7469 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
7470 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
7471 Current Release (VC 9.0):
7472 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
7473 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
7475 2) iASL Compiler/Disassembler and Tools:
7477 iASL: Added generic data types to the Data Table compiler. Add "generic"
7479 types such as UINT32, String, Unicode, etc., to simplify the generation
7481 platform-defined tables such as UEFI. Lin Ming.
7483 iASL: Added listing support for the Data Table Compiler. Adds listing
7485 (-l) to display actual binary output for each line of input code.
7487 ----------------------------------------
7488 09 December 2010. Summary of changes for version 20101209:
7490 1) ACPI CA Core Subsystem:
7492 Completed the major overhaul of the GPE support code that was begun in
7494 2010. Major features include: removal of _PRW execution in ACPICA (host
7495 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
7496 changes to existing interfaces, simplification of GPE handler operation,
7498 a handful of new interfaces:
7504 One new file, evxfgpe.c to consolidate all external GPE interfaces.
7506 See the ACPICA Programmer Reference for full details and programming
7507 information. See the new section 4.4 "General Purpose Event (GPE)
7509 for a full overview, and section 8.7 "ACPI General Purpose Event
7511 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
7513 Bob Moore, Rafael Wysocki.
7515 Implemented a new GPE feature for Windows compatibility, the "Implicit
7517 GPE Notify". This feature will automatically issue a Notify(2) on a
7519 when a Wake GPE is received if there is no corresponding GPE method or
7520 handler. ACPICA BZ 870.
7522 Fixed a problem with the Scope() operator during table parse and load
7524 During load phase (table load or method execution), the scope operator
7526 not enter the target into the namespace. Instead, it should open a new
7528 at the target location. Linux BZ 19462, ACPICA BZ 882.
7530 Example Code and Data Size: These are the sizes for the OS-independent
7531 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7532 debug version of the code includes the debug output trace mechanism and
7534 much larger code and data size.
7537 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
7538 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
7540 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
7541 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
7543 2) iASL Compiler/Disassembler and Tools:
7545 iASL: Relax the alphanumeric restriction on _CID strings. These strings
7547 "bus-specific" per the ACPI specification, and therefore any characters
7549 acceptable. The only checks that can be performed are for a null string
7551 perhaps for a leading asterisk. ACPICA BZ 886.
7553 iASL: Fixed a problem where a syntax error that caused a premature EOF
7554 condition on the source file emitted a very confusing error message. The
7555 premature EOF is now detected correctly. ACPICA BZ 891.
7557 Disassembler: Decode the AccessSize within a Generic Address Structure
7559 access, word access, etc.) Note, this field does not allow arbitrary bit
7560 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
7562 New: AcpiNames utility - Example namespace dump utility. Shows an example
7564 ACPICA configuration for a minimal namespace dump utility. Uses table and
7565 namespace managers, but no AML interpreter. Does not add any
7567 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
7568 partition and configure ACPICA. ACPICA BZ 883.
7570 AML Debugger: Increased the debugger buffer size for method return
7572 Was 4K, increased to 16K. Also enhanced error messages for debugger
7574 execution, including the buffer overflow case.
7576 ----------------------------------------
7577 13 October 2010. Summary of changes for version 20101013:
7579 1) ACPI CA Core Subsystem:
7581 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
7583 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
7584 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
7586 Changed the type of the predefined namespace object _TZ from ThermalZone
7588 Device. This was found to be confusing to the host software that
7590 the various thermal zones, since _TZ is not really a ThermalZone.
7593 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
7596 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
7597 string is "Windows 2006 SP2".
7599 Eliminated duplicate code in AcpiUtExecute* functions. Now that the
7601 code automatically repairs _HID-related strings, this type of code is no
7602 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
7605 Example Code and Data Size: These are the sizes for the OS-independent
7606 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7607 debug version of the code includes the debug output trace mechanism and
7609 much larger code and data size.
7612 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
7613 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
7615 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
7616 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
7618 2) iASL Compiler/Disassembler and Tools:
7620 iASL: Implemented additional compile-time validation for _HID strings.
7622 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
7625 the string must be exactly seven or eight characters. For both _HID and
7627 strings, all characters must be alphanumeric. ACPICA BZ 874.
7629 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
7630 descriptors that are mostly or all zeros, with the expectation that they
7632 be filled in at runtime. iASL now allows this as long as there is a
7634 tag" (name) associated with the descriptor, which gives the ASL a handle
7635 needed to modify the descriptor. ACPICA BZ 873.
7637 Added single-thread support to the generic Unix application OSL.
7639 for iASL support, this change removes the use of semaphores in the
7641 threaded ACPICA tools/applications - increasing performance. The
7642 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
7643 option. ACPICA BZ 879.
7645 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
7647 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
7649 iASL: Moved all compiler messages to a new file, aslmessages.h.
7651 ----------------------------------------
7652 15 September 2010. Summary of changes for version 20100915:
7654 1) ACPI CA Core Subsystem:
7656 Removed the AcpiOsDerivePciId OSL interface. The various host
7658 of this function were not OS-dependent and are now obsolete and can be
7659 removed from all host OSLs. This function has been replaced by
7660 AcpiHwDerivePciId, which is now part of the ACPICA core code.
7661 AcpiHwDerivePciId has been implemented without recursion. Adds one new
7662 module, hwpci.c. ACPICA BZ 857.
7664 Implemented a dynamic repair for _HID and _CID strings. The following
7665 problems are now repaired at runtime: 1) Remove a leading asterisk in the
7666 string, and 2) the entire string is uppercased. Both repairs are in
7667 accordance with the ACPI specification and will simplify host driver
7671 The ACPI_THREAD_ID type is no longer configurable, internally it is now
7672 always UINT64. This simplifies the ACPICA code, especially any printf
7674 UINT64 is the only common data type for all thread_id types across all
7675 operating systems. It is now up to the host OSL to cast the native
7677 type to UINT64 before returning the value to ACPICA (via
7679 Lin Ming, Bob Moore.
7681 Added the ACPI_INLINE type to enhance the ACPICA configuration. The
7683 keyword is not standard across compilers, and this type allows inline to
7685 configured on a per-compiler basis. Lin Ming.
7687 Made the system global AcpiGbl_SystemAwakeAndRunning publicly
7689 Added an extern for this boolean in acpixf.h. Some hosts utilize this
7691 during suspend/restore operations. ACPICA BZ 869.
7693 All code that implements error/warning messages with the "ACPI:" prefix
7695 been moved to a new module, utxferror.c.
7697 The UINT64_OVERLAY was moved to utmath.c, which is the only module where
7699 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
7701 Example Code and Data Size: These are the sizes for the OS-independent
7702 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7703 debug version of the code includes the debug output trace mechanism and
7705 much larger code and data size.
7708 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
7709 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
7711 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
7712 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
7714 2) iASL Compiler/Disassembler and Tools:
7716 iASL/Disassembler: Write ACPI errors to stderr instead of the output
7718 This keeps the output files free of random error messages that may
7720 from within the namespace/interpreter code. Used this opportunity to
7722 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
7723 866. Lin Ming, Bob Moore.
7725 Tools: update some printfs for ansi warnings on size_t. Handle width
7727 of size_t on 32-bit versus 64-bit generations. Lin Ming.
7729 ----------------------------------------
7730 06 August 2010. Summary of changes for version 20100806:
7732 1) ACPI CA Core Subsystem:
7734 Designed and implemented a new host interface to the _OSI support code.
7736 will allow the host to dynamically add or remove multiple _OSI strings,
7738 well as install an optional handler that is called for each _OSI
7740 Also added a new AML debugger command, 'osi' to display and modify the
7742 _OSI string table, and test support in the AcpiExec utility. See the
7744 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
7746 AcpiInstallInterface - Add an _OSI string.
7747 AcpiRemoveInterface - Delete an _OSI string.
7748 AcpiInstallInterfaceHandler - Install optional _OSI handler.
7750 AcpiOsValidateInterface - no longer used.
7752 source/components/utilities/utosi.c
7754 Re-introduced the support to enable multi-byte transfers for Embedded
7755 Controller (EC) operation regions. A reported problem was found to be a
7757 in the host OS, not in the multi-byte support. Previously, the maximum
7759 size passed to the EC operation region handler was a single byte. There
7761 often EC Fields larger than one byte that need to be transferred, and it
7763 useful for the EC driver to lock these as a single transaction. This
7765 enables single transfers larger than 8 bits. This effectively changes the
7766 access to the EC space from ByteAcc to AnyAcc, and will probably require
7767 changes to the host OS Embedded Controller driver to enable 16/32/64/256-
7769 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
7771 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
7772 prototype in acpiosxf.h had the output value pointer as a (void *).
7773 It should be a (UINT64 *). This may affect some host OSL code.
7775 Fixed a couple problems with the recently modified Linux makefiles for
7777 and AcpiExec. These new makefiles place the generated object files in the
7778 local directory so that there can be no collisions between the files that
7780 shared between them that are compiled with different options.
7782 Example Code and Data Size: These are the sizes for the OS-independent
7783 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7784 debug version of the code includes the debug output trace mechanism and
7786 much larger code and data size.
7789 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7790 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
7792 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
7793 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
7795 2) iASL Compiler/Disassembler and Tools:
7797 iASL/Disassembler: Added a new option (-da, "disassemble all") to load
7799 namespace from and disassemble an entire group of AML files. Useful for
7800 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
7802 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
7804 iASL: Allow multiple invocations of -e option. This change allows
7806 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
7810 ----------------------------------------
7811 02 July 2010. Summary of changes for version 20100702:
7813 1) ACPI CA Core Subsystem:
7815 Implemented several updates to the recently added GPE reference count
7816 support. The model for "wake" GPEs is changing to give the host OS
7818 control of these GPEs. Eventually, the ACPICA core will not execute any
7820 methods, since the host already must execute them. Also, additional
7822 were made to help ensure that the reference counts are kept in proper
7823 synchronization with reality. Rafael J. Wysocki.
7825 1) Ensure that GPEs are not enabled twice during initialization.
7826 2) Ensure that GPE enable masks stay in sync with the reference count.
7827 3) Do not inadvertently enable GPEs when writing GPE registers.
7828 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
7829 interface. This interface will set or clear individual GPEs for wakeup.
7830 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These
7832 are now used for "runtime" GPEs only.
7834 Changed the behavior of the GPE install/remove handler interfaces. The
7837 no longer disabled during this process, as it was found to cause problems
7839 some machines. Rafael J. Wysocki.
7841 Reverted a change introduced in version 20100528 to enable Embedded
7842 Controller multi-byte transfers. This change was found to cause problems
7844 Index Fields and possibly Bank Fields. It will be reintroduced when these
7845 problems have been resolved.
7847 Fixed a problem with references to Alias objects within Package Objects.
7849 reference to an Alias within the definition of a Package was not always
7850 resolved properly. Aliases to objects like Processors, Thermal zones,
7852 were resolved to the actual object instead of a reference to the object
7855 should be. Package objects are only allowed to contain integer, string,
7856 buffer, package, and reference objects. Redhat bugzilla 608648.
7858 Example Code and Data Size: These are the sizes for the OS-independent
7859 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7860 debug version of the code includes the debug output trace mechanism and
7862 much larger code and data size.
7865 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7866 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
7868 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7869 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
7871 2) iASL Compiler/Disassembler and Tools:
7873 iASL: Implemented a new compiler subsystem to allow definition and
7874 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
7876 are called "ACPI Data Tables", and the new compiler is the "Data Table
7877 Compiler". This compiler is intended to simplify the existing error-prone
7878 process of creating these tables for the BIOS, as well as allowing the
7879 disassembly, modification, recompilation, and override of existing ACPI
7881 tables. See the iASL User Guide for detailed information.
7883 iASL: Implemented a new Template Generator option in support of the new
7885 Table Compiler. This option will create examples of all known ACPI tables
7886 that can be used as the basis for table development. See the iASL
7887 documentation and the -T option.
7889 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
7892 Updated the Linux makefiles for iASL and AcpiExec to place the generated
7893 object files in the local directory so that there can be no collisions
7894 between the shared files between them that are generated with different
7897 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
7899 the #define __APPLE__ to enable this support.
7901 ----------------------------------------
7902 28 May 2010. Summary of changes for version 20100528:
7904 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
7905 available at www.acpi.info. This is primarily an errata release.
7907 1) ACPI CA Core Subsystem:
7909 Undefined ACPI tables: We are looking for the definitions for the
7911 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
7913 Implemented support to enable multi-byte transfers for Embedded
7915 (EC) operation regions. Previously, the maximum data size passed to the
7917 operation region handler was a single byte. There are often EC Fields
7919 than one byte that need to be transferred, and it is useful for the EC
7921 to lock these as a single transaction. This change enables single
7923 larger than 8 bits. This effectively changes the access to the EC space
7925 ByteAcc to AnyAcc, and will probably require changes to the host OS
7927 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
7929 transfers. Alexey Starikovskiy, Lin Ming
7931 Implemented a performance enhancement for namespace search and access.
7933 change enhances the performance of namespace searches and walks by adding
7935 backpointer to the parent in each namespace node. On large namespaces,
7937 change can improve overall ACPI performance by up to 9X. Adding a pointer
7939 each namespace node increases the overall size of the internal namespace
7941 about 5%, since each namespace entry usually consists of both a namespace
7942 node and an ACPI operand object. However, this is the first growth of the
7943 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
7945 Implemented a performance optimization that reduces the number of
7947 walks. On control method exit, only walk the namespace if the method is
7949 to have created namespace objects outside of its local scope. Previously,
7951 entire namespace was traversed on each control method exit. This change
7953 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
7956 Added support to truncate I/O addresses to 16 bits for Windows
7958 Some ASL code has been seen in the field that inadvertently has bits set
7959 above bit 15. This feature is optional and is enabled if the BIOS
7961 any Windows OSI strings. It can also be enabled by the host OS. Matthew
7964 Added support to limit the maximum time for the ASL Sleep() operator. To
7965 prevent accidental deep sleeps, limit the maximum time that Sleep() will
7966 actually sleep. Configurable, the default maximum is two seconds. ACPICA
7969 Added run-time validation support for the _WDG and_WED Microsoft
7971 methods. These objects are defined by "Windows Instrumentation", and are
7973 part of the ACPI spec. ACPICA BZ 860.
7975 Expanded all statistic counters used during namespace and device
7976 initialization from 16 to 32 bits in order to support very large
7979 Replaced all instances of %d in printf format specifiers with %u since
7981 all integers in ACPICA are unsigned.
7983 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
7987 Example Code and Data Size: These are the sizes for the OS-independent
7988 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7989 debug version of the code includes the debug output trace mechanism and
7991 much larger code and data size.
7994 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
7995 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
7997 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7998 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
8000 2) iASL Compiler/Disassembler and Tools:
8002 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
8003 methods. These objects are defined by "Windows Instrumentation", and are
8005 part of the ACPI spec. ACPICA BZ 860.
8007 AcpiExec: added option to disable the memory tracking mechanism. The -dt
8008 option will disable the tracking mechanism, which improves performance
8011 AcpiExec: Restructured the command line options into -d (disable) and -e
8014 ----------------------------------------
8015 28 April 2010. Summary of changes for version 20100428:
8017 1) ACPI CA Core Subsystem:
8019 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
8020 including FADT-based and GPE Block Devices, execute any _PRW methods in
8022 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
8023 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
8024 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
8025 Devices. Provides compatibility with other ACPI implementations. Two new
8026 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
8029 Fixed a regression introduced in version 20100331 within the table
8031 where initial table loading could fail. This was introduced in the fix
8033 AcpiReallocateRootTable. Also, renamed some of fields in the table
8035 data structures to clarify their meaning and use.
8037 Fixed a possible allocation overrun during internal object copy in
8038 AcpiUtCopySimpleObject. The original code did not correctly handle the
8040 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
8043 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
8044 possible access beyond end-of-allocation. Also, now fully validate
8046 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
8048 Example Code and Data Size: These are the sizes for the OS-independent
8049 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8050 debug version of the code includes the debug output trace mechanism and
8052 much larger code and data size.
8055 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
8056 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
8058 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
8059 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
8061 2) iASL Compiler/Disassembler and Tools:
8063 iASL: Implemented Min/Max/Len/Gran validation for address resource
8064 descriptors. This change implements validation for the address fields
8066 are common to all address-type resource descriptors. These checks are
8067 implemented: Checks for valid Min/Max, length within the Min/Max window,
8068 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
8070 table 6-40 in the ACPI 4.0a specification. Also split the large
8072 and aslrestype2.c files into five new files. ACPICA BZ 840.
8074 iASL: Added support for the _Wxx predefined names. This support was
8076 and these names were not recognized by the compiler as valid predefined
8077 names. ACPICA BZ 851.
8079 iASL: Added an error for all predefined names that are defined to return
8081 value and thus must be implemented as Control Methods. These include all
8083 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
8084 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
8086 iASL: Implemented the -ts option to emit hex AML data in ASL format, as
8088 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
8090 dynamically loaded via the Load() operator. Also cleaned up output for
8093 ta and -tc options. ACPICA BZ 853.
8095 Tests: Added a new file with examples of extended iASL error checking.
8096 Demonstrates the advanced error checking ability of the iASL compiler.
8097 Available at tests/misc/badcode.asl.
8099 ----------------------------------------
8100 31 March 2010. Summary of changes for version 20100331:
8102 1) ACPI CA Core Subsystem:
8104 Completed a major update for the GPE support in order to improve support
8106 shared GPEs and to simplify both host OS and ACPICA code. Added a
8108 count mechanism to support shared GPEs that require multiple device
8110 Several external interfaces have changed. One external interface has been
8111 removed. One new external interface was added. Most of the GPE external
8112 interfaces now use the GPE spinlock instead of the events mutex (and the
8113 Flags parameter for many GPE interfaces has been removed.) See the
8115 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
8117 Wysocki. ACPICA BZ 831.
8120 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
8126 Implemented write support for DataTable operation regions. These regions
8128 defined via the DataTableRegion() operator. Previously, only read support
8130 implemented. The ACPI specification allows DataTableRegions to be
8134 Implemented a new subsystem option to force a copy of the DSDT to local
8135 memory. Optionally copy the entire DSDT to local memory (instead of
8137 mapping it.) There are some (albeit very rare) BIOSs that corrupt or
8139 the original DSDT, creating the need for this option. Default is FALSE,
8143 Implemented detection of a corrupted or replaced DSDT. This change adds
8144 support to detect a DSDT that has been corrupted and/or replaced from
8146 the OS (by firmware). This is typically catastrophic for the system, but
8148 been seen on some machines. Once this problem has been detected, the DSDT
8149 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
8151 Fixed two problems with AcpiReallocateRootTable during the root table
8153 When copying the root table to the new allocation, the length used was
8154 incorrect. The new size was used instead of the current table size,
8156 too much data was copied. Also, the count of available slots for ACPI
8158 was not set correctly. Alexey Starikovskiy, Bob Moore.
8160 Example Code and Data Size: These are the sizes for the OS-independent
8161 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8162 debug version of the code includes the debug output trace mechanism and
8164 much larger code and data size.
8167 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
8168 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
8170 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
8171 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
8173 2) iASL Compiler/Disassembler and Tools:
8175 iASL: Implement limited typechecking for values returned from predefined
8176 control methods. The type of any returned static (unnamed) object is now
8177 validated. For example, Return(1). ACPICA BZ 786.
8179 iASL: Fixed a predefined name object verification regression. Fixes a
8181 introduced in version 20100304. An error is incorrectly generated if a
8182 predefined name is declared as a static named object with a value defined
8183 using the keywords "Zero", "One", or "Ones". Lin Ming.
8185 iASL: Added Windows 7 support for the -g option (get local ACPI tables)
8187 reducing the requested registry access rights. ACPICA BZ 842.
8189 Disassembler: fixed a possible fault when generating External()
8191 Introduced in commit ae7d6fd: Properly handle externals with parent-
8193 (carat). Fixes a string length allocation calculation. Lin Ming.
8195 ----------------------------------------
8196 04 March 2010. Summary of changes for version 20100304:
8198 1) ACPI CA Core Subsystem:
8200 Fixed a possible problem with the AML Mutex handling function
8201 AcpiExReleaseMutex where the function could fault under the very rare
8202 condition when the interpreter has blocked, the interpreter lock is
8204 the interpreter is then reentered via the same thread, and attempts to
8205 acquire an AML mutex that was previously acquired. FreeBSD report 140979.
8209 Implemented additional configuration support for the AML "Debug Object".
8210 Output from the debug object can now be enabled via a global variable,
8211 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
8213 This debug output is now available in the release version of ACPICA
8215 of just the debug version. Also, the entire debug output module can now
8217 configured out of the ACPICA build if desired. One new file added,
8218 executer/exdebug.c. Lin Ming, Bob Moore.
8220 Added header support for the ACPI MCHI table (Management Controller Host
8221 Interface Table). This table was added in ACPI 4.0, but the defining
8223 has only recently become available.
8225 Standardized output of integer values for ACPICA warnings/errors. Always
8227 0x prefix for hex output, always use %u for unsigned integer decimal
8229 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
8231 invocations.) These invocations were converted from the original
8232 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
8234 Example Code and Data Size: These are the sizes for the OS-independent
8235 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8236 debug version of the code includes the debug output trace mechanism and
8238 much larger code and data size.
8241 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
8242 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
8244 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
8245 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
8247 2) iASL Compiler/Disassembler and Tools:
8249 iASL: Implemented typechecking support for static (non-control method)
8250 predefined named objects that are declared with the Name() operator. For
8251 example, the type of this object is now validated to be of type Integer:
8252 Name(_BBN, 1). This change migrates the compiler to using the core
8254 name table instead of maintaining a local version. Added a new file,
8255 aslpredef.c. ACPICA BZ 832.
8257 Disassembler: Added support for the ACPI 4.0 MCHI table.
8259 ----------------------------------------
8260 21 January 2010. Summary of changes for version 20100121:
8262 1) ACPI CA Core Subsystem:
8264 Added the 2010 copyright to all module headers and signons. This affects
8265 virtually every file in the ACPICA core subsystem, the iASL compiler, the
8266 tools/utilities, and the test suites.
8268 Implemented a change to the AcpiGetDevices interface to eliminate
8270 invocations of the _STA method. In the case where a specific _HID is
8271 requested, do not run _STA until a _HID match is found. This eliminates
8272 potentially dozens of _STA calls during a search for a particular
8274 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
8276 Implemented an additional repair for predefined method return values.
8278 to repair unexpected NULL elements within returned Package objects.
8281 Integer of value zero, a NULL String, or a zero-length Buffer as
8283 ACPICA BZ 818. Lin Ming, Bob Moore.
8285 Removed the obsolete ACPI_INTEGER data type. This type was introduced as
8287 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
8289 64-bit AML integers). It is now obsolete and this change removes it from
8291 ACPICA code base, replaced by UINT64. The original typedef has been
8293 for now for compatibility with existing device driver code. ACPICA BZ
8296 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
8298 the parse tree object.
8300 Added additional warning options for the gcc-4 generation. Updated the
8302 accordingly. This includes some code restructuring to eliminate
8304 code, elimination of some gotos, elimination of unused return values,
8306 additional casting, and removal of redundant declarations.
8308 Example Code and Data Size: These are the sizes for the OS-independent
8309 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8310 debug version of the code includes the debug output trace mechanism and
8312 much larger code and data size.
8315 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
8316 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
8318 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
8319 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
8321 2) iASL Compiler/Disassembler and Tools:
8323 No functional changes for this release.
8325 ----------------------------------------
8326 14 December 2009. Summary of changes for version 20091214:
8328 1) ACPI CA Core Subsystem:
8330 Enhanced automatic data type conversions for predefined name repairs.
8332 change expands the automatic repairs/conversions for predefined name
8334 values to make Integers, Strings, and Buffers fully interchangeable.
8337 Buffer can be converted to a Package of Integers if necessary. The
8339 module was completely restructured. Lin Ming, Bob Moore.
8341 Implemented automatic removal of null package elements during predefined
8343 repairs. This change will automatically remove embedded and trailing NULL
8344 package elements from returned package objects that are defined to
8347 variable number of sub-packages. The driver is then presented with a
8349 with no null elements to deal with. ACPICA BZ 819.
8351 Implemented a repair for the predefined _FDE and _GTM names. The expected
8352 return value for both names is a Buffer of 5 DWORDs. This repair fixes
8354 possible problems (both seen in the field), where a package of integers
8356 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
8359 Implemented additional module-level code support. This change will
8361 execute module-level code that is not at the root of the namespace (under
8363 Device object, etc.). Now executes the code within the current scope
8365 of the root. ACPICA BZ 762. Lin Ming.
8367 Fixed possible mutex acquisition errors when running _REG methods. Fixes
8369 problem where mutex errors can occur when running a _REG method that is
8371 the same scope as a method-defined operation region or an operation
8373 under a module-level IF block. This type of code is rare, so the problem
8375 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
8377 Fixed a possible memory leak during module-level code execution. An
8379 could be leaked for each block of executed module-level code if the
8380 interpreter slack mode is enabled This change deletes any implicitly
8382 object from the module-level code block. Lin Ming.
8384 Removed messages for successful predefined repair(s). The repair
8386 was considered too wordy. Now, messages are only unconditionally emitted
8388 the return object cannot be repaired. Existing messages for successful
8389 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
8392 Example Code and Data Size: These are the sizes for the OS-independent
8393 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8394 debug version of the code includes the debug output trace mechanism and
8396 much larger code and data size.
8399 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
8400 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
8402 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
8403 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
8405 2) iASL Compiler/Disassembler and Tools:
8407 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
8409 were no longer automatically removed at the termination of the compile.
8411 acpiexec: Implemented the -f option to specify default region fill value.
8412 This option specifies the value used to initialize buffers that simulate
8413 operation regions. Default value is zero. Useful for debugging problems
8415 depend on a specific initial value for a region or field.
8417 ----------------------------------------
8418 12 November 2009. Summary of changes for version 20091112:
8420 1) ACPI CA Core Subsystem:
8422 Implemented a post-order callback to AcpiWalkNamespace. The existing
8423 interface only has a pre-order callback. This change adds an additional
8424 parameter for a post-order callback which will be more useful for bus
8426 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
8428 Modified the behavior of the operation region memory mapping cache for
8429 SystemMemory. Ensure that the memory mappings created for operation
8431 do not cross 4K page boundaries. Crossing a page boundary while mapping
8432 regions can cause kernel warnings on some hosts if the pages have
8434 attributes. Such regions are probably BIOS bugs, and this is the
8436 Linux BZ 14445. Lin Ming.
8438 Implemented an automatic repair for predefined methods that must return
8439 sorted lists. This change will repair (by sorting) packages returned by
8441 _PSS, and _TSS. Drivers can now assume that the packages are correctly
8443 and do not contain NULL package elements. Adds one new file,
8444 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
8446 Fixed a possible fault during predefined name validation if a return
8448 object contains NULL elements. Also adds a warning if a NULL element is
8449 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
8451 include repair or removal of all such NULL elements where possible.
8453 Implemented additional module-level executable AML code support. This
8455 will execute module-level code that is not at the root of the namespace
8456 (under a Device object, etc.) at table load time. Module-level executable
8458 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
8460 Implemented a new internal function to create Integer objects. This
8462 simplifies miscellaneous object creation code. ACPICA BZ 823.
8464 Reduced the severity of predefined repair messages, Warning to Info.
8466 the object was successfully repaired, a warning is too severe. Reduced to
8468 info message for now. These messages may eventually be changed to debug-
8472 Example Code and Data Size: These are the sizes for the OS-independent
8473 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8474 debug version of the code includes the debug output trace mechanism and
8476 much larger code and data size.
8479 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
8480 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
8482 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
8483 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
8485 2) iASL Compiler/Disassembler and Tools:
8487 iASL: Implemented Switch() with While(1) so that Break works correctly.
8489 change correctly implements the Switch operator with a surrounding
8491 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
8493 iASL: Added a message if a package initializer list is shorter than
8495 length. Adds a new remark for a Package() declaration if an initializer
8497 exists, but is shorter than the declared length of the package. Although
8498 technically legal, this is probably a coding error and it is seen in the
8499 field. ACPICA BZ 815. Lin Ming, Bob Moore.
8501 iASL: Fixed a problem where the compiler could fault after the maximum
8503 of errors was reached (200).
8505 acpixtract: Fixed a possible warning for pointer cast if the compiler
8507 level set very high.
8509 ----------------------------------------
8510 13 October 2009. Summary of changes for version 20091013:
8512 1) ACPI CA Core Subsystem:
8514 Fixed a problem where an Operation Region _REG method could be executed
8516 than once. If a custom address space handler is installed by the host
8518 the "initialize operation regions" phase of the ACPICA initialization,
8520 _REG methods for that address space could be executed twice. This change
8521 fixes the problem. ACPICA BZ 427. Lin Ming.
8523 Fixed a possible memory leak for the Scope() ASL operator. When the exact
8524 invocation of "Scope(\)" is executed (change scope to root), one internal
8525 operand object was leaked. Lin Ming.
8527 Implemented a run-time repair for the _MAT predefined method. If the _MAT
8528 return value is defined as a Field object in the AML, and the field
8529 size is less than or equal to the default width of an integer (32 or
8531 can incorrectly return an Integer instead of a Buffer. ACPICA now
8532 automatically repairs this problem. ACPICA BZ 810.
8534 Implemented a run-time repair for the _BIF and _BIX predefined methods.
8536 "OEM Information" field is often incorrectly returned as an Integer with
8537 value zero if the field is not supported by the platform. This is due to
8539 ambiguity in the ACPI specification. The field should always be a string.
8540 ACPICA now automatically repairs this problem by returning a NULL string
8541 within the returned Package. ACPICA BZ 807.
8543 Example Code and Data Size: These are the sizes for the OS-independent
8544 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8545 debug version of the code includes the debug output trace mechanism and
8547 much larger code and data size.
8550 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
8551 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
8553 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
8554 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
8556 2) iASL Compiler/Disassembler and Tools:
8558 Disassembler: Fixed a problem where references to external symbols that
8559 contained one or more parent-prefixes (carats) were not handled
8561 possibly causing a fault. ACPICA BZ 806. Lin Ming.
8563 Disassembler: Restructured the code so that all functions that handle
8564 external symbols are in a single module. One new file is added,
8567 AML Debugger: Added a max count argument for the Batch command (which
8568 executes multiple predefined methods within the namespace.)
8570 iASL: Updated the compiler documentation (User Reference.) Available at
8571 http://www.acpica.org/documentation/. ACPICA BZ 750.
8573 AcpiXtract: Updated for Lint and other formatting changes. Close all open
8576 ----------------------------------------
8577 03 September 2009. Summary of changes for version 20090903:
8579 1) ACPI CA Core Subsystem:
8581 For Windows Vista compatibility, added the automatic execution of an _INI
8582 method located at the namespace root (\_INI). This method is executed at
8583 table load time. This support is in addition to the automatic execution
8585 \_SB._INI. Lin Ming.
8587 Fixed a possible memory leak in the interpreter for AML package objects
8589 the package initializer list is longer than the defined size of the
8591 This apparently can only happen if the BIOS changes the package size on
8593 fly (seen in a _PSS object), as ASL compilers do not allow this. The
8594 interpreter will truncate the package to the defined size (and issue an
8596 message), but previously could leave the extra objects undeleted if they
8598 pre-created during the argument processing (such is the case if the
8600 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
8602 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
8603 This has been reported in the field. Previously, ACPICA would zero out
8605 buffer/string. Now, the operation is treated as a noop. Provides Windows
8606 compatibility. ACPICA BZ 803. Lin Ming.
8608 Removed an extraneous error message for ASL constructs of the form
8609 Store(LocalX,LocalX) when LocalX is uninitialized. These curious
8611 are seen in many BIOSs and are once again treated as NOOPs and no error
8613 emitted when they are encountered. ACPICA BZ 785.
8615 Fixed an extraneous warning message if a _DSM reserved method returns a
8616 Package object. _DSM can return any type of object, so validation on the
8617 return type cannot be performed. ACPICA BZ 802.
8619 Example Code and Data Size: These are the sizes for the OS-independent
8620 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8621 debug version of the code includes the debug output trace mechanism and
8623 much larger code and data size.
8626 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
8627 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
8629 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
8630 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
8632 2) iASL Compiler/Disassembler and Tools:
8634 iASL: Fixed a problem with the use of the Alias operator and Resource
8635 Templates. The correct alias is now constructed and no error is emitted.
8638 iASL: Implemented the -I option to specify additional search directories
8640 include files. Allows multiple additional search paths for include files.
8641 Directories are searched in the order specified on the command line
8643 the local directory is searched.) ACPICA BZ 800.
8645 iASL: Fixed a problem where the full pathname for include files was not
8646 emitted for warnings/errors. This caused the IDE support to not work
8647 properly. ACPICA BZ 765.
8649 iASL: Implemented the -@ option to specify a Windows-style response file
8650 containing additional command line options. ACPICA BZ 801.
8652 AcpiExec: Added support to load multiple AML files simultaneously (such
8655 DSDT and multiple SSDTs). Also added support for wildcards within the AML
8656 pathname. These features allow all machine tables to be easily loaded and
8657 debugged together. ACPICA BZ 804.
8659 Disassembler: Added missing support for disassembly of HEST table Error
8663 ----------------------------------------
8664 30 July 2009. Summary of changes for version 20090730:
8666 The ACPI 4.0 implementation for ACPICA is complete with this release.
8668 1) ACPI CA Core Subsystem:
8670 ACPI 4.0: Added header file support for all new and changed ACPI tables.
8671 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
8673 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
8675 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
8677 have been some ACPI 4.0 changes to other existing tables. Split the large
8678 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
8680 ACPI 4.0: Implemented predefined name validation for all new names. There
8682 31 new names in ACPI 4.0. The predefined validation module was split into
8684 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
8686 Implemented support for so-called "module-level executable code". This is
8687 executable AML code that exists outside of any control method and is
8689 to be executed at table load time. Although illegal since ACPI 2.0, this
8691 of code still exists and is apparently still being created. Blocks of
8693 code are now detected and executed as intended. Currently, the code
8695 must exist under either an If, Else, or While construct; these are the
8696 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
8698 Implemented an automatic dynamic repair for predefined names that return
8699 nested Package objects. This applies to predefined names that are defined
8701 return a variable-length Package of sub-packages. If the number of sub-
8702 packages is one, BIOS code is occasionally seen that creates a simple
8704 package with no sub-packages. This code attempts to fix the problem by
8705 wrapping a new package object around the existing package. These methods
8707 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
8711 Fixed a regression introduced in 20090625 for the AcpiGetDevices
8713 The _HID/_CID matching was broken and no longer matched IDs correctly.
8717 Fixed a problem with AcpiReset where the reset would silently fail if the
8718 register was one of the protected I/O ports. AcpiReset now bypasses the
8720 validation mechanism. This may eventually be driven into the
8724 Fixed a regression related to the recent update of the AcpiRead/Write
8725 interfaces. A sleep/suspend could fail if the optional PM2 Control
8727 does not exist during an attempt to write the Bus Master Arbitration bit.
8728 (However, some hosts already delete the code that writes this bit, and
8730 code may in fact be obsolete at this date.) ACPICA BZ 799.
8732 Fixed a problem where AcpiTerminate could fault if inadvertently called
8734 in succession. ACPICA BZ 795.
8736 Example Code and Data Size: These are the sizes for the OS-independent
8737 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8738 debug version of the code includes the debug output trace mechanism and
8740 much larger code and data size.
8743 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
8744 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
8746 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
8747 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
8749 2) iASL Compiler/Disassembler and Tools:
8751 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
8752 changes to existing tables. ACPICA BZ 775.
8754 ----------------------------------------
8755 25 June 2009. Summary of changes for version 20090625:
8757 The ACPI 4.0 Specification was released on June 16 and is available at
8758 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
8759 continue for the next few releases.
8761 1) ACPI CA Core Subsystem:
8763 ACPI 4.0: Implemented interpreter support for the IPMI operation region
8764 address space. Includes support for bi-directional data buffers and an
8766 address space handler (to be installed by an IPMI device driver.) ACPICA
8770 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
8772 support in both the header files and the disassembler.
8774 Completed a major update for the AcpiGetObjectInfo external interface.
8776 - Support for variable, unlimited length HID, UID, and CID strings.
8777 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
8779 - Call the _SxW power methods on behalf of a device object.
8780 - Determine if a device is a PCI root bridge.
8781 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
8782 These changes will require an update to all callers of this interface.
8784 the updated ACPICA Programmer Reference for details. One new source file
8786 been added - utilities/utids.c. ACPICA BZ 368, 780.
8788 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
8789 transfers. The Value parameter has been extended from 32 bits to 64 bits
8791 order to support new ACPI 4.0 tables. These changes will require an
8794 all callers of these interfaces. See the ACPICA Programmer Reference for
8795 details. ACPICA BZ 768.
8797 Fixed several problems with AcpiAttachData. The handler was not invoked
8799 the host node was deleted. The data sub-object was not automatically
8801 when the host node was deleted. The interface to the handler had an
8803 parameter, this was removed. ACPICA BZ 778.
8805 Enhanced the function that dumps ACPI table headers. All non-printable
8806 characters in the string fields are now replaced with '?' (Signature,
8808 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
8809 these fields are occasionally seen in the field. ACPICA BZ 788.
8811 Fixed a problem with predefined method repair code where the code that
8812 attempts to repair/convert an object of incorrect type is only executed
8814 the first time the predefined method is called. The mechanism that
8816 warnings on subsequent calls was interfering with the repair mechanism.
8819 Fixed a possible memory leak in the predefined validation/repair code
8822 buffer is automatically converted to an expected string object.
8824 Removed obsolete 16-bit files from the distribution and from the current
8826 tree head. ACPICA BZ 776.
8828 Example Code and Data Size: These are the sizes for the OS-independent
8829 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8830 debug version of the code includes the debug output trace mechanism and
8832 much larger code and data size.
8835 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
8836 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
8838 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
8839 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
8841 2) iASL Compiler/Disassembler and Tools:
8843 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
8844 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
8846 ACPI 4.0: iASL - implemented compile-time validation support for all new
8847 predefined names and control methods (31 total). ACPICA BZ 769.
8849 ----------------------------------------
8850 21 May 2009. Summary of changes for version 20090521:
8852 1) ACPI CA Core Subsystem:
8854 Disabled the preservation of the SCI enable bit in the PM1 control
8856 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
8859 a "preserved" bit - "OSPM always preserves this bit position", section
8860 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
8861 because the bit needs to be explicitly set by the OS as a workaround. No
8862 machines fail if the bit is not preserved. Therefore, ACPICA no longer
8863 attempts to preserve this bit.
8865 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
8866 incorrectly formed _PRT package could cause a fault. Added validation to
8867 ensure that each package element is actually a sub-package.
8869 Implemented a new interface to install or override a single control
8871 AcpiInstallMethod. This interface is useful when debugging in order to
8873 an existing method or to install a missing method without having to
8875 the entire ACPI table. See the ACPICA Programmer Reference for use and
8876 examples. Lin Ming, Bob Moore.
8878 Fixed several reference count issues with the DdbHandle object that is
8879 created from a Load or LoadTable operator. Prevent premature deletion of
8881 object. Also, mark the object as invalid once the table has been
8883 This is needed because the handle itself may not be deleted after the
8885 unload, depending on whether it has been stored in a named object by the
8888 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
8889 mutexes of the same sync level are acquired but then not released in
8891 opposite order, the internally maintained Current Sync Level becomes
8893 and can cause subsequent execution errors. ACPICA BZ 471.
8895 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
8896 specification has been changed to make the SyncLevel for mutex objects
8898 useful. When releasing a mutex, the SyncLevel of the mutex must now be
8900 same as the current sync level. This makes more sense than the previous
8902 (SyncLevel less than or equal). This change updates the code to match the
8905 Fixed a problem with the local version of the AcpiOsPurgeCache function.
8907 (local) cache must be locked during all cache object deletions. Andrew
8910 Updated the Load operator to use operation region interfaces. This
8912 direct memory mapping with region access calls. Now, all region accesses
8914 through the installed region handler as they should.
8916 Simplified and optimized the NsGetNextNode function. Reduced parameter
8918 and reduced code for this frequently used function.
8920 Example Code and Data Size: These are the sizes for the OS-independent
8921 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8922 debug version of the code includes the debug output trace mechanism and
8924 much larger code and data size.
8927 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
8928 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
8930 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
8931 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
8933 2) iASL Compiler/Disassembler and Tools:
8935 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
8937 with sub-table disassembly and handling invalid sub-tables. Attempt
8939 after an invalid sub-table ID.
8941 ----------------------------------------
8942 22 April 2009. Summary of changes for version 20090422:
8944 1) ACPI CA Core Subsystem:
8946 Fixed a compatibility issue with the recently released I/O port
8948 mechanism. For windows compatibility, 1) On a port protection violation,
8949 simply ignore the request and do not return an exception (allow the
8951 method to continue execution.) 2) If only part of the request overlaps a
8952 protected port, read/write the individual ports that are not protected.
8956 Enhanced the execution of the ASL/AML BreakPoint operator so that it
8958 breaks into the AML debugger if the debugger is present. This matches the
8959 ACPI-defined behavior.
8961 Fixed several possible warnings related to the use of the configurable
8962 ACPI_THREAD_ID. This type can now be configured as either an integer or a
8963 pointer with no warnings. Also fixes several warnings in printf-like
8964 statements for the 64-bit build when the type is configured as a pointer.
8967 Fixed a number of possible warnings when compiling with gcc 4+ (depending
8969 warning options.) Examples include printf formats, aliasing, unused
8971 missing prototypes, missing switch default statements, use of non-ANSI
8972 library functions, use of non-ANSI constructs. See generate/unix/Makefile
8974 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
8976 Example Code and Data Size: These are the sizes for the OS-independent
8977 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8978 debug version of the code includes the debug output trace mechanism and
8980 much larger code and data size.
8983 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
8984 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
8986 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
8987 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
8989 2) iASL Compiler/Disassembler and Tools:
8991 iASL: Fixed a generation warning from Bison 2.3 and fixed several
8996 iASL: Fixed a problem where the Unix/Linux versions of the compiler could
8998 correctly digest Windows/DOS formatted files (with CR/LF).
9000 iASL: Added a new option for "quiet mode" (-va) that produces only the
9001 compilation summary, not individual errors and warnings. Useful for large
9004 AcpiExec: Implemented a new option (-z) to enable a forced
9006 timeout that can be used to detect hang conditions during execution of
9008 code (includes both internal semaphores and AML-defined mutexes and
9011 Added new makefiles for the generation of acpica in a generic unix-like
9012 environment. These makefiles are intended to generate the acpica tools
9014 utilities from the original acpica git source tree structure.
9016 Test Suites: Updated and cleaned up the documentation files. Updated the
9017 copyrights to 2009, affecting all source files. Use the new version of
9019 with quiet mode. Increased the number of available semaphores in the
9021 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
9023 an alternate implementation of the semaphore timeout to allow aslts to
9024 execute fully on Cygwin.
9026 ----------------------------------------
9027 20 March 2009. Summary of changes for version 20090320:
9029 1) ACPI CA Core Subsystem:
9031 Fixed a possible race condition between AcpiWalkNamespace and dynamic
9033 unloads. Added a reader/writer locking mechanism to allow multiple
9035 namespace walks (readers), but block a dynamic table unload until it can
9037 exclusive write access to the namespace. This fixes a problem where a
9039 unload could (possibly catastrophically) delete the portion of the
9041 that is currently being examined by a walk. Adds a new file, utlock.c,
9043 implements the reader/writer lock mechanism. ACPICA BZ 749.
9045 Fixed a regression introduced in version 20090220 where a change to the
9047 handling could cause the ACPICA subsystem to access non-existent I/O
9050 Modified the handling of FADT register and table (FACS/DSDT) addresses.
9052 FADT can contain both 32-bit and 64-bit versions of these addresses.
9053 Previously, the 64-bit versions were favored, meaning that if both 32 and
9055 versions were valid, but not equal, the 64-bit version was used. This was
9056 found to cause some machines to fail. Now, in this case, the 32-bit
9058 is used instead. This now matches the Windows behavior.
9060 Implemented a new mechanism to protect certain I/O ports. Provides
9062 compatibility and protects the standard PC I/O ports from access via AML
9063 code. Adds a new file, hwvalid.c
9065 Fixed a possible extraneous warning message from the FADT support. The
9066 message warns of a 32/64 length mismatch between the legacy and GAS
9067 definitions for a register.
9069 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
9071 made obsolete by the port protection mechanism above. It was previously
9073 to validate the entire address range of an operation region, which could
9075 incorrect if the range included illegal ports, but fields within the
9076 operation region did not actually access those ports. Validation is now
9077 performed on a per-field basis instead of the entire region.
9079 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
9080 Ignored bits must be "preserved" according to the ACPI spec. Usually,
9082 means a read/modify/write when writing to the register. However, for
9084 registers, writing a one means clear the event. Writing a zero means
9086 the event (do not clear.) This behavior is clarified in the ACPI 4.0
9088 and the ACPICA code now simply always writes a zero to the ignored bit.
9090 Modified the handling of ignored bits for the PM1 A/B Control Registers.
9092 per the ACPI specification, for the control registers, preserve
9093 (read/modify/write) all bits that are defined as either reserved or
9096 Updated the handling of write-only bits in the PM1 A/B Control Registers.
9097 When reading the register, zero the write-only bits as per the ACPI spec.
9098 ACPICA BZ 443. Lin Ming.
9100 Removed "Linux" from the list of supported _OSI strings. Linux no longer
9101 wants to reply true to this request. The Windows strings are the only
9103 through the AML that are tested and known to work properly.
9106 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
9107 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
9109 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
9110 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
9112 2) iASL Compiler/Disassembler and Tools:
9114 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
9118 ----------------------------------------
9119 20 February 2009. Summary of changes for version 20090220:
9121 1) ACPI CA Core Subsystem:
9123 Optimized the ACPI register locking. Removed locking for reads from the
9125 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
9127 not required when reading the single-bit registers. The
9128 AcpiGetRegisterUnlocked function is no longer needed and has been
9130 This will improve performance for reads on these registers. ACPICA BZ
9133 Fixed the parameter validation for AcpiRead/Write. Now return
9134 AE_BAD_PARAMETER if the input register pointer is null, and
9137 the register has an address of zero. Previously, these cases simply
9139 AE_OK. For optional registers such as PM1B status/enable/control, the
9141 should check for a valid register address before calling. ACPICA BZ 748.
9143 Renamed the external ACPI bit register access functions. Renamed
9144 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
9145 functions. The new names are AcpiReadBitRegister and
9146 AcpiWriteBitRegister.
9147 Also, restructured the code for these functions by simplifying the code
9149 and condensing duplicate code to reduce code size.
9151 Added new functions to transparently handle the possibly split PM1 A/B
9152 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
9154 now handle the split registers for PM1 Status, Enable, and Control.
9159 Added a function to handle the PM1 control registers,
9160 AcpiHwWritePm1Control.
9161 This function writes both of the PM1 control registers (A/B). These
9163 are different than the PM1 A/B status and enable registers in that
9165 values can be written to the A/B registers. Most notably, the SLP_TYP
9167 can be different, as per the values returned from the _Sx predefined
9170 Removed an extra register write within AcpiHwClearAcpiStatus. This
9172 was writing an optional PM1B status register twice. The existing call to
9174 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
9176 register. ACPICA BZ 751.
9178 Split out the PM1 Status registers from the FADT. Added new globals for
9180 registers (A/B), similar to the way the PM1 Enable registers are handled.
9181 Instead of overloading the FADT Event Register blocks. This makes the
9183 clearer and less prone to error.
9185 Fixed the warning message for when the platform contains too many ACPI
9187 for the default size of the global root table data structure. The
9189 for the truncation value was incorrect.
9191 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
9192 obsolete macro, since it is now a simple reference to ->common.type.
9194 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
9196 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
9197 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
9198 simply SLEEP_TYPE. ACPICA BZ 754.
9200 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
9201 function is only needed on 64-bit host operating systems and is thus not
9202 included for 32-bit hosts.
9204 Debug output: print the input and result for invocations of the _OSI
9206 control method via the ACPI_LV_INFO debug level. Also, reduced some of
9208 verbosity of this debug level. Len Brown.
9210 Example Code and Data Size: These are the sizes for the OS-independent
9211 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9212 debug version of the code includes the debug output trace mechanism and
9214 much larger code and data size.
9217 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
9218 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
9220 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
9221 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
9223 2) iASL Compiler/Disassembler and Tools:
9225 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
9226 various legal performance profiles.
9228 ----------------------------------------
9229 23 January 2009. Summary of changes for version 20090123:
9231 1) ACPI CA Core Subsystem:
9233 Added the 2009 copyright to all module headers and signons. This affects
9234 virtually every file in the ACPICA core subsystem, the iASL compiler, and
9235 the tools/utilities.
9237 Implemented a change to allow the host to override any ACPI table,
9239 dynamically loaded tables. Previously, only the DSDT could be replaced by
9241 host. With this change, the AcpiOsTableOverride interface is called for
9243 table found in the RSDT/XSDT during ACPICA initialization, and also
9245 a table is dynamically loaded via the AML Load operator.
9247 Updated FADT flag definitions, especially the Boot Architecture flags.
9249 Debugger: For the Find command, automatically pad the input ACPI name
9251 underscores if the name is shorter than 4 characters. This enables a
9253 with the actual namespace entry which is itself padded with underscores.
9255 Example Code and Data Size: These are the sizes for the OS-independent
9256 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9257 debug version of the code includes the debug output trace mechanism and
9259 much larger code and data size.
9262 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
9263 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
9265 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
9266 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
9268 2) iASL Compiler/Disassembler and Tools:
9270 Fix build error under Bison-2.4.
9272 Disassembler: Enhanced FADT support. Added decoding of the Boot
9274 flags. Now decode all flags, regardless of the FADT version. Flag output
9275 includes the FADT version which first defined each flag.
9277 The iASL -g option now dumps the RSDT to a file (in addition to the FADT
9279 DSDT). Windows only.
9281 ----------------------------------------
9282 04 December 2008. Summary of changes for version 20081204:
9284 1) ACPI CA Core Subsystem:
9286 The ACPICA Programmer Reference has been completely updated and revamped
9288 this release. This includes updates to the external interfaces, OSL
9289 interfaces, the overview sections, and the debugger reference.
9291 Several new ACPICA interfaces have been implemented and documented in the
9292 programmer reference:
9293 AcpiReset - Writes the reset value to the FADT-defined reset register.
9294 AcpiDisableAllGpes - Disable all available GPEs.
9295 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
9296 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
9297 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
9298 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
9299 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
9301 Most of the public ACPI hardware-related interfaces have been moved to a
9303 file, components/hardware/hwxface.c
9305 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
9306 register lengths within the FADT are now used, and the low level ACPI
9307 register access no longer hardcodes the ACPI register lengths. Given that
9308 there may be some risk in actually trusting the FADT register lengths, a
9310 time option was added to fall back to the default hardcoded lengths if
9312 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
9313 option is set to true for now, and a warning is issued if a suspicious
9315 register length is overridden with the default value.
9317 Fixed a reference count issue in NsRepairObject. This problem was
9319 in version 20081031 as part of a fix to repair Buffer objects within
9322 Added semaphore support to the Linux/Unix application OS-services layer
9323 (OSL). ACPICA BZ 448. Lin Ming.
9325 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
9327 be implemented in the OSL, or will binary semaphores be used instead.
9329 Example Code and Data Size: These are the sizes for the OS-independent
9330 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9331 debug version of the code includes the debug output trace mechanism and
9333 much larger code and data size.
9336 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
9337 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
9339 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
9340 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
9342 2) iASL Compiler/Disassembler and Tools:
9344 iASL: Completed the '-e' option to include additional ACPI tables in
9347 aid with disassembly and External statement generation. ACPICA BZ 742.
9351 iASL: Removed the "named object in while loop" error. The compiler cannot
9352 determine how many times a loop will execute. ACPICA BZ 730.
9354 Disassembler: Implemented support for FADT revision 2 (MS extension).
9358 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
9361 ----------------------------------------
9362 31 October 2008. Summary of changes for version 20081031:
9364 1) ACPI CA Core Subsystem:
9366 Restructured the ACPICA header files into public/private. acpi.h now
9368 only the "public" acpica headers. All other acpica headers are "private"
9370 should not be included by acpica users. One new file, accommon.h is used
9372 include the commonly used private headers for acpica code generation.
9374 plans include moving all private headers to a new subdirectory.
9376 Implemented an automatic Buffer->String return value conversion for
9377 predefined ACPI methods. For these methods (such as _BIF), added
9379 conversion for return objects that are required to be a String, but a
9381 was found instead. This can happen when reading string battery data from
9383 operation region, because it used to be difficult to convert the data
9385 buffer to string from within the ASL. Ensures that the host OS is
9387 with a valid null-terminated string. Linux BZ 11822.
9389 Updated the FACS waking vector interfaces. Split
9390 AcpiSetFirmwareWakingVector
9391 into two: one for the 32-bit vector, another for the 64-bit vector. This
9393 required because the host OS must setup the wake much differently for
9395 vector (real vs. protected mode, etc.) and the interface itself should
9398 deciding which vector to use. Also, eliminated the
9399 GetFirmwareWakingVector
9400 interface, as it served no purpose (only the firmware reads the vector,
9402 only writes the vector.) ACPICA BZ 731.
9404 Implemented a mechanism to escape infinite AML While() loops. Added a
9406 counter to force exit from AML While loops if the count becomes too
9408 This can occur in poorly written AML when the hardware does not respond
9409 within a while loop and the loop does not implement a timeout. The
9411 loop count is configurable. A new exception code is returned when a loop
9413 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
9415 Optimized the execution of AML While loops. Previously, a control state
9416 object was allocated and freed for each execution of the loop. The
9417 optimization is to simply reuse the control state for each iteration.
9419 speeds up the raw loop execution time by about 5%.
9421 Enhanced the implicit return mechanism. For Windows compatibility, return
9423 implicit integer of value zero for methods that contain no executable
9425 Such methods are seen in the field as stubs (presumably), and can cause
9426 drivers to fail if they expect a return value. Lin Ming.
9428 Allow multiple backslashes as root prefixes in namepaths. In a fully
9429 qualified namepath, allow multiple backslash prefixes. This can happen
9431 is seen in the field) because of the use of a double-backslash in strings
9432 (since backslash is the escape character) causing confusion. ACPICA BZ
9436 Emit a warning if two different FACS or DSDT tables are discovered in the
9437 FADT. Checks if there are two valid but different addresses for the FACS
9439 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
9441 Consolidated the method argument count validation code. Merged the code
9443 validates control method argument counts into the predefined validation
9444 module. Eliminates possible multiple warnings for incorrect argument
9447 Implemented ACPICA example code. Includes code for ACPICA initialization,
9448 handler installation, and calling a control method. Available at
9449 source/tools/examples.
9451 Added a global pointer for FACS table to simplify internal FACS access.
9453 the global pointer instead of using AcpiGetTableByIndex for each FACS
9455 This simplifies the code for the Global Lock and the Firmware Waking
9458 Example Code and Data Size: These are the sizes for the OS-independent
9459 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9460 debug version of the code includes the debug output trace mechanism and
9462 much larger code and data size.
9465 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
9466 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
9468 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
9469 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
9471 2) iASL Compiler/Disassembler and Tools:
9473 iASL: Improved disassembly of external method calls. Added the -e option
9475 allow the inclusion of additional ACPI tables to help with the
9478 method invocations and the generation of external declarations during the
9479 disassembly. Certain external method invocations cannot be disassembled
9480 properly without the actual declaration of the method. Use the -e option
9482 include the table where the external method(s) are actually declared.
9484 useful for disassembling SSDTs that make method calls back to the master
9485 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl
9487 -e dsdt.aml ssdt1.aml
9489 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
9490 problem where the use of an alias within a namepath would result in a not
9491 found error or cause the compiler to fault. Also now allows forward
9492 references from the Alias operator itself. ACPICA BZ 738.
9494 ----------------------------------------
9495 26 September 2008. Summary of changes for version 20080926:
9497 1) ACPI CA Core Subsystem:
9499 Designed and implemented a mechanism to validate predefined ACPI methods
9501 objects. This code validates the predefined ACPI objects (objects whose
9503 start with underscore) that appear in the namespace, at the time they are
9504 evaluated. The argument count and the type of the returned object are
9505 validated against the ACPI specification. The purpose of this validation
9507 to detect problems with the BIOS-implemented predefined ACPI objects
9509 the results are returned to the ACPI-related drivers. Future enhancements
9511 include actual repair of incorrect return objects where possible. Two new
9512 files are nspredef.c and acpredef.h.
9514 Fixed a fault in the AML parser if a memory allocation fails during the
9516 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
9518 Fixed an issue with implicit return compatibility. This change improves
9520 implicit return mechanism to be more compatible with the MS interpreter.
9522 Ming, ACPICA BZ 349.
9524 Implemented support for zero-length buffer-to-string conversions. Allow
9526 length strings during interpreter buffer-to-string conversions. For
9528 during the ToDecimalString and ToHexString operators, as well as implicit
9529 conversions. Fiodor Suietov, ACPICA BZ 585.
9531 Fixed two possible memory leaks in the error exit paths of
9532 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
9534 similar in that they use a stack of state objects in order to eliminate
9535 recursion. The stack must be fully unwound and deallocated if an error
9536 occurs. Lin Ming. ACPICA BZ 383.
9538 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
9540 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
9541 Moore ACPICA BZ 442.
9543 Removed the obsolete version number in module headers. Removed the
9544 "$Revision" number that appeared in each module header. This version
9546 was useful under SourceSafe and CVS, but has no meaning under git. It is
9548 only incorrect, it could also be misleading.
9550 Example Code and Data Size: These are the sizes for the OS-independent
9551 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9552 debug version of the code includes the debug output trace mechanism and
9554 much larger code and data size.
9557 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
9558 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
9560 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
9561 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
9563 ----------------------------------------
9564 29 August 2008. Summary of changes for version 20080829:
9566 1) ACPI CA Core Subsystem:
9568 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
9569 Reference. Changes include the elimination of cheating on the Object
9571 for the DdbHandle subtype, addition of a reference class field to
9572 differentiate the various reference types (instead of an AML opcode), and
9574 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
9576 Reduce an error to a warning for an incorrect method argument count.
9577 Previously aborted with an error if too few arguments were passed to a
9578 control method via the external ACPICA interface. Now issue a warning
9580 and continue. Handles the case where the method inadvertently declares
9582 many arguments, but does not actually use the extra ones. Applies mainly
9584 the predefined methods. Lin Ming. Linux BZ 11032.
9586 Disallow the evaluation of named object types with no intrinsic value.
9588 AE_TYPE for objects that have no value and therefore evaluation is
9590 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
9592 these types were allowed, but an exception would be generated at some
9594 during the evaluation. Now, the error is generated up front.
9596 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
9597 (nsnames.c). Fixes a leak in the error exit path.
9599 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
9601 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
9603 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
9606 Removed obsolete and/or unused exception codes from the acexcep.h header.
9607 There is the possibility that certain device drivers may be affected if
9609 use any of these exceptions.
9611 The ACPICA documentation has been added to the public git source tree,
9613 acpica/documents. Included are the ACPICA programmer reference, the iASL
9614 compiler reference, and the changes.txt release logfile.
9616 Example Code and Data Size: These are the sizes for the OS-independent
9617 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9618 debug version of the code includes the debug output trace mechanism and
9620 much larger code and data size.
9623 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
9624 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
9626 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
9627 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
9629 2) iASL Compiler/Disassembler and Tools:
9631 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
9632 defines _SCP with 3 arguments. Previous versions defined it with only 1
9633 argument. iASL now allows both definitions.
9635 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
9637 length subtables when disassembling ACPI tables. Also fixed a couple of
9638 errors where a full 16-bit table type field was not extracted from the
9642 acpisrc: Improve comment counting mechanism for generating source code
9643 statistics. Count first and last lines of multi-line comments as
9645 not comment lines. Handle Linux legal header in addition to standard
9649 ----------------------------------------
9651 29 July 2008. Summary of changes for version 20080729:
9653 1) ACPI CA Core Subsystem:
9655 Fix a possible deadlock in the GPE dispatch. Remove call to
9656 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
9658 to acquire the GPE lock but can deadlock since the GPE lock is already
9660 at dispatch time. This code was introduced in version 20060831 as a
9662 to Linux BZ 6881 and has since been removed from Linux.
9664 Add a function to dereference returned reference objects. Examines the
9666 object from a call to AcpiEvaluateObject. Any Index or RefOf references
9668 automatically dereferenced in an attempt to return something useful
9670 reference types cannot be converted into an external ACPI_OBJECT.)
9672 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
9674 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
9675 subtables for the MADT and one new subtable for the SRAT. Includes
9676 disassembler and AcpiSrc support. Data from the Intel 64 Architecture
9678 Specification, June 2008.
9680 Additional error checking for pathname utilities. Add error check after
9682 calls to AcpiNsGetPathnameLength. Add status return from
9683 AcpiNsBuildExternalPath and check after all calls. Add parameter
9685 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
9687 Return status from the global init function AcpiUtGlobalInitialize. This
9689 used by both the kernel subsystem and the utilities such as iASL
9691 The function could possibly fail when the caches are initialized. Yang
9694 Add a function to decode reference object types to strings. Created for
9695 improved error messages.
9697 Improve object conversion error messages. Better error messages during
9699 conversion from internal to the external ACPI_OBJECT. Used for external
9701 to AcpiEvaluateObject.
9703 Example Code and Data Size: These are the sizes for the OS-independent
9704 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9705 debug version of the code includes the debug output trace mechanism and
9707 much larger code and data size.
9710 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
9711 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
9713 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
9714 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
9716 2) iASL Compiler/Disassembler and Tools:
9718 Debugger: fix a possible hang when evaluating non-methods. Fixes a
9720 introduced in version 20080701. If the object being evaluated (via
9722 command) is not a method, the debugger can hang while trying to obtain
9724 existent parameters.
9726 iASL: relax error for using reserved "_T_x" identifiers. These names can
9727 appear in a disassembled ASL file if they were emitted by the original
9728 compiler. Instead of issuing an error or warning and forcing the user to
9729 manually change these names, issue a remark instead.
9731 iASL: error if named object created in while loop. Emit an error if any
9733 object is created within a While loop. If allowed, this code will
9736 run-time error on the second iteration of the loop when an attempt is
9739 create the same named object twice. ACPICA bugzilla 730.
9741 iASL: Support absolute pathnames for include files. Add support for
9743 pathnames within the Include operator. previously, only relative
9747 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
9749 The ACPI spec requires one interrupt minimum. BZ 423
9751 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
9752 Handles the case for the Interrupt Resource Descriptor where
9753 the ResourceSource argument is omitted but ResourceSourceIndex
9754 is present. Now leave room for the Index. BZ 426
9756 iASL: Prevent error message if CondRefOf target does not exist. Fixes
9758 where an error message is emitted if the target does not exist. BZ 516
9760 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
9761 (get ACPI tables on Windows). This was apparently broken in version
9764 AcpiXtract: Handle EOF while extracting data. Correctly handle the case
9766 the EOF happens immediately after the last table in the input file. Print
9767 completion message. Previously, no message was displayed in this case.
9769 ----------------------------------------
9770 01 July 2008. Summary of changes for version 20080701:
9772 0) Git source tree / acpica.org
9774 Fixed a problem where a git-clone from http would not transfer the entire
9777 1) ACPI CA Core Subsystem:
9779 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
9780 enable bit. Now performs a read-change-write of the enable register
9782 of simply writing out the cached enable mask. This will prevent
9784 enabling of GPEs if a rogue GPE is received during initialization (before
9786 handlers are installed.)
9788 Implemented a copy for dynamically loaded tables. Previously, dynamically
9789 loaded tables were simply mapped - but on some machines this memory is
9790 corrupted after suspend. Now copy the table to a local buffer. For the
9791 OpRegion case, added checksum verify. Use the table length from the table
9792 header, not the region length. For the Buffer case, use the table length
9793 also. Dennis Noordsij, Bob Moore. BZ 10734
9795 Fixed a problem where the same ACPI table could not be dynamically loaded
9797 unloaded more than once. Without this change, a table cannot be loaded
9799 once it has been loaded/unloaded one time. The current mechanism does not
9800 unregister a table upon an unload. During a load, if the same table is
9802 this no longer returns an exception. BZ 722
9804 Fixed a problem where the wrong descriptor length was calculated for the
9805 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
9807 are calculated as 12 bytes long, but the actual length in the internal
9808 descriptor is 16 because of the round-up to 8 on the 64-bit build.
9810 by Linn Crosetto. BZ 728
9812 Fixed a possible memory leak in the Unload operator. The DdbHandle
9814 by Load() did not have its reference count decremented during unload,
9816 to a memory leak. Lin Ming. BZ 727
9818 Fixed a possible memory leak when deleting thermal/processor objects. Any
9819 associated notify handlers (and objects) were not being deleted. Fiodor
9822 Fixed the ordering of the ASCII names in the global mutex table to match
9824 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
9826 Vegard Nossum. BZ 726
9828 Enhanced the AcpiGetObjectInfo interface to return the number of required
9829 arguments if the object is a control method. Added this call to the
9831 so the proper number of default arguments are passed to a method. This
9832 prevents a warning when executing methods from AcpiExec.
9834 Added a check for an invalid handle in AcpiGetObjectInfo. Return
9835 AE_BAD_PARAMETER if input handle is invalid. BZ 474
9837 Fixed an extraneous warning from exconfig.c on the 64-bit build.
9839 Example Code and Data Size: These are the sizes for the OS-independent
9840 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9841 debug version of the code includes the debug output trace mechanism and
9843 much larger code and data size.
9846 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
9847 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
9849 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
9850 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
9852 2) iASL Compiler/Disassembler and Tools:
9854 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
9855 resource descriptor names.
9857 iASL: Detect invalid ASCII characters in input (windows version). Removed
9859 "-CF" flag from the flex compile, enables correct detection of non-ASCII
9860 characters in the input. BZ 441
9862 iASL: Eliminate warning when result of LoadTable is not used. Eliminate
9864 "result of operation not used" warning when the DDB handle returned from
9865 LoadTable is not used. The warning is not needed. BZ 590
9867 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
9870 pass address of table to the AML. Added option to disable OpRegion
9872 to allow creation of an OpRegion with a real address that was passed to
9874 All of this allows testing of the Load and Unload operators from
9877 Debugger: update tables command for unloaded tables. Handle unloaded
9879 and use the standard table header output routine.
9881 ----------------------------------------
9882 09 June 2008. Summary of changes for version 20080609:
9884 1) ACPI CA Core Subsystem:
9886 Implemented a workaround for reversed _PRT entries. A significant number
9888 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
9889 change dynamically detects and repairs this problem. Provides
9891 with MS ACPI. BZ 6859
9893 Simplified the internal ACPI hardware interfaces to eliminate the locking
9894 flag parameter from Register Read/Write. Added a new external interface,
9895 AcpiGetRegisterUnlocked.
9897 Fixed a problem where the invocation of a GPE control method could hang.
9899 was a regression introduced in 20080514. The new method argument count
9900 validation mechanism can enter an infinite loop when a GPE method is
9901 dispatched. Problem fixed by removing the obsolete code that passed GPE
9903 information to the notify handler via the control method parameter
9906 Fixed a problem where the _SST execution status was incorrectly returned
9908 the caller of AcpiEnterSleepStatePrep. This was a regression introduced
9910 20080514. _SST is optional and a NOT_FOUND exception should never be
9913 Fixed a problem where a deleted object could be accessed from within the
9915 parser. This was a regression introduced in version 20080123 as a fix for
9917 Unload operator. Lin Ming. BZ 10669
9919 Cleaned up the debug operand dump mechanism. Eliminated unnecessary
9921 and eliminated the use of a negative index in a loop. Operands are now
9922 displayed in the correct order, not backwards. This also fixes a
9924 introduced in 20080514 on 64-bit systems where the elimination of
9925 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
9928 Fixed a possible memory leak in EvPciConfigRegionSetup where the error
9930 path did not delete a locally allocated structure.
9932 Updated definitions for the DMAR and SRAT tables to synchronize with the
9933 current specifications. Includes disassembler support.
9935 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
9936 loop termination value was used. Loop terminated on iteration early,
9938 one mutex. Linn Crosetto
9940 Example Code and Data Size: These are the sizes for the OS-independent
9941 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9942 debug version of the code includes the debug output trace mechanism and
9944 much larger code and data size.
9947 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
9948 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
9950 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
9951 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
9953 2) iASL Compiler/Disassembler and Tools:
9955 Disassembler: Implemented support for EisaId() within _CID objects. Now
9956 disassemble integer _CID objects back to EisaId invocations, including
9957 multiple integers within _CID packages. Includes single-step support for
9960 Disassembler: Added support for DMAR and SRAT table definition changes.
9962 ----------------------------------------
9963 14 May 2008. Summary of changes for version 20080514:
9965 1) ACPI CA Core Subsystem:
9967 Fixed a problem where GPEs were enabled too early during the ACPICA
9968 initialization. This could lead to "handler not installed" errors on some
9969 machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
9971 ensures that all operation regions and devices throughout the namespace
9973 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
9975 Implemented a change to the enter sleep code. Moved execution of the _GTS
9976 method to just before setting sleep enable bit. The execution was moved
9978 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
9979 immediately before the SLP_EN bit is set, as per the ACPI specification.
9982 Implemented a fix to disable unknown GPEs (2nd version). Now always
9984 the GPE, even if ACPICA thinks that that it is already disabled. It is
9985 possible that the AML or some other code has enabled the GPE unbeknownst
9989 Fixed a problem with the Field operator where zero-length fields would
9991 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
9993 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
9995 Implemented a fix for the Load operator, now load the table at the
9997 root. This reverts a change introduced in version 20071019. The table is
9999 loaded at the namespace root even though this goes against the ACPI
10000 specification. This provides compatibility with other ACPI
10002 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
10005 Fixed a problem where ACPICA would not Load() tables with unusual
10007 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
10008 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
10009 Therefore, signature validation is worthless. Apparently MS ACPI accepts
10011 signatures, ACPICA must be compatible. BZ 10454.
10013 Fixed a possible negative array index in AcpiUtValidateException. Added
10015 fields to the exception string arrays to eliminate a -1 subtraction on
10019 Updated the debug tracking macros to reduce overall code and data size.
10020 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
10021 instead of pointers to static strings. Jan Beulich and Bob Moore.
10023 Implemented argument count checking in control method invocation via
10024 AcpiEvaluateObject. Now emit an error if too few arguments, warning if
10026 many. This applies only to extern programmatic control method execution,
10028 method-to-method calls within the AML. Lin Ming.
10030 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
10032 longer needed, especially with the removal of 16-bit support. It was
10034 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
10037 32/64-bit platforms is required.
10039 Added the C const qualifier for appropriate string constants -- mostly
10040 MODULE_NAME and printf format strings. Jan Beulich.
10042 Example Code and Data Size: These are the sizes for the OS-independent
10043 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10044 debug version of the code includes the debug output trace mechanism and
10046 much larger code and data size.
10049 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
10050 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
10052 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
10053 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
10055 2) iASL Compiler/Disassembler and Tools:
10057 Implemented ACPI table revision ID validation in the disassembler. Zero
10059 always invalid. For DSDTs, the ID controls the interpreter integer width.
10061 means 32-bit and this is unusual. 2 or greater is 64-bit.
10063 ----------------------------------------
10064 21 March 2008. Summary of changes for version 20080321:
10066 1) ACPI CA Core Subsystem:
10068 Implemented an additional change to the GPE support in order to suppress
10069 spurious or stray GPEs. The AcpiEvDisableGpe function will now
10071 disable incoming GPEs that are neither enabled nor disabled -- meaning
10073 the GPE is unknown to the system. This should prevent future interrupt
10075 from that GPE. BZ 6217 (Zhang Rui)
10077 Fixed a problem where NULL package elements were not returned to the
10078 AcpiEvaluateObject interface correctly. The element was simply ignored
10079 instead of returning a NULL ACPI_OBJECT package element, potentially
10081 a buffer overflow and/or confusing the caller who expected a fixed number
10083 elements. BZ 10132 (Lin Ming, Bob Moore)
10085 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
10087 Qword), Field, BankField, and IndexField operators when invoked from
10089 an executing control method. In this case, these operators created
10091 nodes that were incorrectly left marked as permanent nodes instead of
10092 temporary nodes. This could cause a problem if there is race condition
10093 between an exiting control method and a running namespace walk. (Reported
10097 Fixed a problem where the CreateField and CreateXXXField operators would
10098 incorrectly allow duplicate names (the name of the field) with no
10102 Implemented several changes for Notify handling. Added support for new
10104 values (ACPI 2.0+) and improved the Notify debug output. Notify on
10105 PowerResource objects is no longer allowed, as per the ACPI
10107 (Bob Moore, Zhang Rui)
10109 All Reference Objects returned via the AcpiEvaluateObject interface are
10111 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
10113 NULL objects - either NULL package elements or unresolved named
10116 Fixed a problem where an extraneous debug message was produced for
10118 objects (when debugging enabled). The message "Package List length larger
10119 than NumElements count" is now produced in the correct case, and is now
10121 error message rather than a debug message. Added a debug message for the
10122 opposite case, where NumElements is larger than the Package List (the
10124 will be padded out with NULL elements as per the ACPI spec.)
10126 Implemented several improvements for the output of the ASL "Debug" object
10128 clarify and keep all data for a given object on one output line.
10130 Fixed two size calculation issues with the variable-length Start
10132 resource descriptor.
10134 Example Code and Data Size: These are the sizes for the OS-independent
10135 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10136 debug version of the code includes the debug output trace mechanism and
10138 a much larger code and data size.
10141 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
10142 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
10144 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
10145 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
10147 2) iASL Compiler/Disassembler and Tools:
10149 Fixed a problem with the use of the Switch operator where execution of
10151 containing method by multiple concurrent threads could cause an
10152 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
10153 actual Switch opcode, it must be simulated with local named temporary
10154 variables and if/else pairs. The solution chosen was to mark any method
10156 uses Switch as Serialized, thus preventing multiple thread entries. BZ
10159 ----------------------------------------
10160 13 February 2008. Summary of changes for version 20080213:
10162 1) ACPI CA Core Subsystem:
10164 Implemented another MS compatibility design change for GPE/Notify
10166 GPEs are now cleared/enabled asynchronously to allow all pending notifies
10168 complete first. It is expected that the OSL will queue the enable request
10169 behind all pending notify requests (may require changes to the local host
10171 in AcpiOsExecute). Alexey Starikovskiy.
10173 Fixed a problem where buffer and package objects passed as arguments to a
10174 control method via the external AcpiEvaluateObject interface could cause
10176 AE_AML_INTERNAL exception depending on the order and type of operators
10177 executed by the target control method.
10179 Fixed a problem where resource descriptor size optimization could cause a
10180 problem when a _CRS resource template is passed to a _SRS method. The
10182 resource template must use the same descriptors (with the same size) as
10183 returned from _CRS. This change affects the following resource
10185 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
10188 Fixed a problem where a CopyObject to RegionField, BankField, and
10190 objects did not perform an implicit conversion as it should. These types
10192 retain their initial type permanently as per the ACPI specification.
10194 a CopyObject to all other object types should not perform an implicit
10195 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
10197 Fixed a problem with the AcpiGetDevices interface where the mechanism to
10198 match device CIDs did not examine the entire list of available CIDs, but
10199 instead aborted on the first non-matching CID. Andrew Patterson.
10201 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
10203 inadvertently changed to return a 16-bit value instead of a 32-bit value,
10204 truncating the upper dword of a 64-bit value. This macro is only used to
10205 display debug output, so no incorrect calculations were made. Also,
10206 reimplemented the macro so that a 64-bit shift is not performed by
10207 inefficient compilers.
10209 Added missing va_end statements that should correspond with each va_start
10212 Example Code and Data Size: These are the sizes for the OS-independent
10213 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10214 debug version of the code includes the debug output trace mechanism and
10216 a much larger code and data size.
10219 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
10220 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
10222 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
10223 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
10225 2) iASL Compiler/Disassembler and Tools:
10227 Implemented full disassembler support for the following new ACPI tables:
10228 BERT, EINJ, and ERST. Implemented partial disassembler support for the
10229 complicated HEST table. These tables support the Windows Hardware Error
10230 Architecture (WHEA).
10232 ----------------------------------------
10233 23 January 2008. Summary of changes for version 20080123:
10235 1) ACPI CA Core Subsystem:
10237 Added the 2008 copyright to all module headers and signons. This affects
10238 virtually every file in the ACPICA core subsystem, the iASL compiler, and
10239 the tools/utilities.
10241 Fixed a problem with the SizeOf operator when used with Package and
10243 objects. These objects have deferred execution for some arguments, and
10245 execution is now completed before the SizeOf is executed. This problem
10247 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
10251 Implemented an enhancement to the interpreter "slack mode". In the
10254 an explicit return or an implicitly returned object from the last
10256 opcode, a control method will now implicitly return an integer of value 0
10258 Microsoft compatibility. (Lin Ming) BZ 392
10260 Fixed a problem with the Load operator where an exception was not
10263 the case where the table is already loaded. (Lin Ming) BZ 463
10265 Implemented support for the use of DDBHandles as an Indexed Reference, as
10267 the ACPI spec. (Lin Ming) BZ 486
10269 Implemented support for UserTerm (Method invocation) for the Unload
10271 as per the ACPI spec. (Lin Ming) BZ 580
10273 Fixed a problem with the LoadTable operator where the OemId and
10275 input strings could cause unexpected failures if they were shorter than
10277 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
10279 Implemented support for UserTerm (Method invocation) for the Unload
10281 as per the ACPI spec. (Lin Ming) BZ 580
10283 Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
10285 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
10287 Example Code and Data Size: These are the sizes for the OS-independent
10288 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10289 debug version of the code includes the debug output trace mechanism and
10291 a much larger code and data size.
10294 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
10295 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
10297 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
10298 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
10300 2) iASL Compiler/Disassembler and Tools:
10302 Implemented support in the disassembler for checksum validation on
10304 binary DSDTs and SSDTs. If incorrect, a message is displayed within the
10306 header dump at the start of the disassembly.
10308 Implemented additional debugging information in the namespace listing
10310 created during compilation. In addition to the namespace hierarchy, the
10312 pathname to each namespace object is displayed.
10314 Fixed a problem with the disassembler where invalid ACPI tables could
10316 faults or infinite loops.
10318 Fixed an unexpected parse error when using the optional "parameter types"
10319 list in a control method declaration. (Lin Ming) BZ 397
10321 Fixed a problem where two External declarations with the same name did
10323 cause an error (Lin Ming) BZ 509
10325 Implemented support for full TermArgs (adding Argx, Localx and method
10326 invocation) for the ParameterData parameter to the LoadTable operator.
10330 ----------------------------------------
10331 19 December 2007. Summary of changes for version 20071219:
10333 1) ACPI CA Core Subsystem:
10335 Implemented full support for deferred execution for the TermArg string
10336 arguments for DataTableRegion. This enables forward references and full
10337 operand resolution for the three string arguments. Similar to
10339 deferred argument execution.) Lin Ming. BZ 430
10341 Implemented full argument resolution support for the BankValue argument
10343 BankField. Previously, only constants were supported, now any TermArg may
10345 used. Lin Ming BZ 387, 393
10347 Fixed a problem with AcpiGetDevices where the search of a branch of the
10348 device tree could be terminated prematurely. In accordance with the ACPI
10349 specification, the search down the current branch is terminated if a
10351 is both not present and not functional (instead of just not present.)
10355 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
10357 the underlying AML code changed the GPE enable registers. Now, any
10359 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
10361 instead of simply ignored. Rui Zhang.
10363 Fixed a problem with Index Fields where the Index register was
10365 limited to a maximum of 32 bits. Now any size may be used.
10367 Fixed a couple memory leaks associated with "implicit return" objects
10369 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
10371 Example Code and Data Size: These are the sizes for the OS-independent
10372 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10373 debug version of the code includes the debug output trace mechanism and
10375 a much larger code and data size.
10378 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
10379 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
10381 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
10382 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
10384 ----------------------------------------
10385 14 November 2007. Summary of changes for version 20071114:
10387 1) ACPI CA Core Subsystem:
10389 Implemented event counters for each of the Fixed Events, the ACPI SCI
10390 (interrupt) itself, and control methods executed. Named
10391 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
10393 should be useful for debugging and statistics.
10395 Implemented a new external interface, AcpiGetStatistics, to retrieve the
10396 contents of the various event counters. Returns the current values for
10397 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
10398 AcpiMethodCount. The interface can be expanded in the future if new
10400 are added. Device drivers should use this interface rather than access
10404 Fixed a problem with the FromBCD and ToBCD operators. With some
10406 the ShortDivide function worked incorrectly, causing problems with the
10408 functions with large input values. A truncation from 64-bit to 32-bit
10409 inadvertently occurred. Internal BZ 435. Lin Ming
10411 Fixed a problem with Index references passed as method arguments.
10413 passed as arguments to control methods were dereferenced immediately
10415 control was passed to the called method). The references are now
10417 passed directly to the called method. BZ 5389. Lin Ming
10419 Fixed a problem with CopyObject used in conjunction with the Index
10421 The reference was incorrectly dereferenced before the copy. The reference
10423 now correctly copied. BZ 5391. Lin Ming
10425 Fixed a problem with Control Method references within Package objects.
10427 references are now correctly generated. This completes the package
10428 construction overhaul that began in version 20071019.
10430 Example Code and Data Size: These are the sizes for the OS-independent
10431 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10432 debug version of the code includes the debug output trace mechanism and
10434 a much larger code and data size.
10437 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
10438 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
10440 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
10441 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
10444 2) iASL Compiler/Disassembler and Tools:
10446 The AcpiExec utility now installs handlers for all of the predefined
10447 Operation Region types. New types supported are: PCI_Config, CMOS, and
10450 Fixed a problem with the 64-bit version of AcpiExec where the extended
10452 bit) address fields for the DSDT and FACS within the FADT were not being
10453 used, causing truncation of the upper 32-bits of these addresses. Lin
10457 ----------------------------------------
10458 19 October 2007. Summary of changes for version 20071019:
10460 1) ACPI CA Core Subsystem:
10462 Fixed a problem with the Alias operator when the target of the alias is a
10463 named ASL operator that opens a new scope -- Scope, Device,
10465 Processor, and ThermalZone. In these cases, any children of the original
10466 operator could not be accessed via the alias, potentially causing
10468 AE_NOT_FOUND exceptions. (BZ 9067)
10470 Fixed a problem with the Package operator where all named references were
10471 created as object references and left otherwise unresolved. According to
10473 ACPI specification, a Package can only contain Data Objects or references
10475 control methods. The implication is that named references to Data Objects
10476 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
10477 immediately upon package creation. This is the approach taken with this
10478 change. References to all other named objects (Methods, Devices, Scopes,
10479 etc.) are all now properly created as reference objects. (BZ 5328)
10481 Reverted a change to Notify handling that was introduced in version
10482 20070508. This version changed the Notify handling from asynchronous to
10483 fully synchronous (Device driver Notify handling with respect to the
10485 ASL operator). It was found that this change caused more problems than it
10486 solved and was removed by most users.
10488 Fixed a problem with the Increment and Decrement operators where the type
10490 the target object could be unexpectedly and incorrectly changed. (BZ 353)
10493 Fixed a problem with the Load and LoadTable operators where the table
10494 location within the namespace was ignored. Instead, the table was always
10495 loaded into the root or current scope. Lin Ming.
10497 Fixed a problem with the Load operator when loading a table from a buffer
10498 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
10500 Fixed a problem with the Debug object where a store of a DdbHandle
10502 object to the Debug object could cause a fault.
10504 Added a table checksum verification for the Load operator, in the case
10506 the load is from a buffer. (BZ 578).
10508 Implemented additional parameter validation for the LoadTable operator.
10510 length of the input strings SignatureString, OemIdString, and OemTableId
10512 now checked for maximum lengths. (BZ 582) Lin Ming.
10514 Example Code and Data Size: These are the sizes for the OS-independent
10515 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10516 debug version of the code includes the debug output trace mechanism and
10518 a much larger code and data size.
10521 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
10522 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
10524 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
10525 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
10528 2) iASL Compiler/Disassembler:
10530 Fixed a problem where if a single file was specified and the file did not
10531 exist, no error message was emitted. (Introduced with wildcard support in
10534 ----------------------------------------
10535 19 September 2007. Summary of changes for version 20070919:
10537 1) ACPI CA Core Subsystem:
10539 Designed and implemented new external interfaces to install and remove
10540 handlers for ACPI table-related events. Current events that are defined
10542 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
10543 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
10544 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
10546 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
10547 (acpi_serialized option on Linux) could cause some systems to hang during
10548 initialization. (Bob Moore) BZ 8171
10550 Fixed a problem where objects of certain types (Device, ThermalZone,
10551 Processor, PowerResource) can be not found if they are declared and
10552 referenced from within the same control method (Lin Ming) BZ 341
10554 Example Code and Data Size: These are the sizes for the OS-independent
10555 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10556 debug version of the code includes the debug output trace mechanism and
10558 a much larger code and data size.
10561 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
10562 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
10564 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
10565 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
10568 2) iASL Compiler/Disassembler:
10570 Implemented support to allow multiple files to be compiled/disassembled
10573 single invocation. This includes command line wildcard support for both
10575 Windows and Unix versions of the compiler. This feature simplifies the
10576 disassembly and compilation of multiple ACPI tables in a single
10579 ----------------------------------------
10580 08 May 2007. Summary of changes for version 20070508:
10582 1) ACPI CA Core Subsystem:
10584 Implemented a Microsoft compatibility design change for the handling of
10586 Notify AML operator. Previously, notify handlers were dispatched and
10587 executed completely asynchronously in a deferred thread. The new design
10588 still executes the notify handlers in a different thread, but the
10590 thread that executed the Notify() now waits at a synchronization point
10592 the notify handler to complete. Some machines depend on a synchronous
10594 operator in order to operate correctly.
10596 Implemented support to allow Package objects to be passed as method
10597 arguments to the external AcpiEvaluateObject interface. Previously, this
10598 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
10599 implemented since there were no reserved control methods that required it
10602 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
10604 contained invalid non-zero values in reserved fields could cause later
10605 failures because these fields have meaning in later revisions of the
10607 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
10609 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
10611 Fixed a problem where the Global Lock handle was not properly updated if
10613 thread that acquired the Global Lock via executing AML code then
10615 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
10619 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
10620 could be corrupted if the interrupt being removed was at the head of the
10621 list. Reported by Linn Crosetto.
10623 Example Code and Data Size: These are the sizes for the OS-independent
10624 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10625 debug version of the code includes the debug output trace mechanism and
10627 a much larger code and data size.
10630 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10631 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
10633 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
10634 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
10636 ----------------------------------------
10637 20 March 2007. Summary of changes for version 20070320:
10639 1) ACPI CA Core Subsystem:
10641 Implemented a change to the order of interpretation and evaluation of AML
10642 operand objects within the AML interpreter. The interpreter now evaluates
10643 operands in the order that they appear in the AML stream (and the
10644 corresponding ASL code), instead of in the reverse order (after the
10646 operand list has been parsed). The previous behavior caused several
10648 incompatibilities with the Microsoft AML interpreter as well as being
10649 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
10651 Implemented a change to the ACPI Global Lock support. All interfaces to
10653 global lock now allow the same thread to acquire the lock multiple times.
10654 This affects the AcpiAcquireGlobalLock external interface to the global
10656 as well as the internal use of the global lock to support AML fields -- a
10657 control method that is holding the global lock can now simultaneously
10659 AML fields that require global lock protection. Previously, in both
10661 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
10663 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
10664 Controller. There is no change to the behavior of the AML Acquire
10666 as this can already be used to acquire a mutex multiple times by the same
10667 thread. BZ 8066. With assistance from Alexey Starikovskiy.
10669 Fixed a problem where invalid objects could be referenced in the AML
10670 Interpreter after error conditions. During operand evaluation, ensure
10672 the internal "Return Object" field is cleared on error and only valid
10673 pointers are stored there. Caused occasional access to deleted objects
10675 resulted in "large reference count" warning messages. Valery Podrezov.
10677 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
10679 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
10682 Fixed an internal problem with the handling of result objects on the
10683 interpreter result stack. BZ 7872. Valery Podrezov.
10685 Removed obsolete code that handled the case where AML_NAME_OP is the
10687 of a reference (Reference.Opcode). This code was no longer necessary. BZ
10688 7874. Valery Podrezov.
10690 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
10693 remnant from the previously discontinued 16-bit support.
10695 Example Code and Data Size: These are the sizes for the OS-independent
10696 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10697 debug version of the code includes the debug output trace mechanism and
10699 a much larger code and data size.
10702 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10703 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10705 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10706 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
10708 ----------------------------------------
10709 26 January 2007. Summary of changes for version 20070126:
10711 1) ACPI CA Core Subsystem:
10713 Added the 2007 copyright to all module headers and signons. This affects
10714 virtually every file in the ACPICA core subsystem, the iASL compiler, and
10717 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
10718 during a table load. A bad pointer was passed in the case where the DSDT
10720 overridden, causing a fault in this case.
10722 Example Code and Data Size: These are the sizes for the OS-independent
10723 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10724 debug version of the code includes the debug output trace mechanism and
10726 a much larger code and data size.
10729 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10730 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10732 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10733 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10735 ----------------------------------------
10736 15 December 2006. Summary of changes for version 20061215:
10738 1) ACPI CA Core Subsystem:
10740 Support for 16-bit ACPICA has been completely removed since it is no
10742 necessary and it clutters the code. All 16-bit macros, types, and
10743 conditional compiles have been removed, cleaning up and simplifying the
10745 across the entire subsystem. DOS support is no longer needed since the
10746 bootable Linux firmware kit is now available.
10748 The handler for the Global Lock is now removed during AcpiTerminate to
10749 enable a clean subsystem restart, via the implementation of the
10750 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
10753 Implemented enhancements to the multithreading support within the
10755 to enable improved multithreading debugging and evaluation of the
10759 Debugger: Enhanced the Statistics/Memory command to emit the total
10761 memory used during the execution, as well as the maximum memory consumed
10763 each of the various object types. (Valery Podrezov)
10765 Example Code and Data Size: These are the sizes for the OS-independent
10766 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10767 debug version of the code includes the debug output trace mechanism and
10769 a much larger code and data size.
10772 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
10773 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
10775 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
10776 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
10779 2) iASL Compiler/Disassembler and Tools:
10781 AcpiExec: Implemented a new option (-m) to display full memory use
10782 statistics upon subsystem/program termination. (Valery Podrezov)
10784 ----------------------------------------
10785 09 November 2006. Summary of changes for version 20061109:
10787 1) ACPI CA Core Subsystem:
10789 Optimized the Load ASL operator in the case where the source operand is
10791 operation region. Simply map the operation region memory, instead of
10792 performing a bytewise read. (Region must be of type SystemMemory, see
10795 Fixed the Load ASL operator for the case where the source operand is a
10796 region field. A buffer object is also allowed as the source operand. BZ
10799 Fixed a problem where the Load ASL operator allowed the source operand to
10801 an operation region of any type. It is now restricted to regions of type
10802 SystemMemory, as per the ACPI specification. BZ 481
10804 Additional cleanup and optimizations for the new Table Manager code.
10806 AcpiEnable will now fail if all of the required ACPI tables are not
10808 (FADT, FACS, DSDT). BZ 477
10810 Added #pragma pack(8/4) to acobject.h to ensure that the structures in
10812 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
10813 manually optimized to be aligned and will not work if it is byte-packed.
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: 78.1K Code, 17.1K Data, 95.2K Total
10823 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
10825 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
10826 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
10829 2) iASL Compiler/Disassembler and Tools:
10831 Fixed a problem where the presence of the _OSI predefined control method
10832 within complex expressions could cause an internal compiler error.
10834 AcpiExec: Implemented full region support for multiple address spaces.
10835 SpaceId is now part of the REGION object. BZ 429
10837 ----------------------------------------
10838 11 October 2006. Summary of changes for version 20061011:
10840 1) ACPI CA Core Subsystem:
10842 Completed an AML interpreter performance enhancement for control method
10843 execution. Previously a 2-pass parse/execution, control methods are now
10844 completely parsed and executed in a single pass. This improves overall
10845 interpreter performance by ~25%, reduces code size, and reduces CPU stack
10846 use. (Valery Podrezov + interpreter changes in version 20051202 that
10847 eliminated namespace loading during the pass one parse.)
10849 Implemented _CID support for PCI Root Bridge detection. If the _HID does
10851 match the predefined PCI Root Bridge IDs, the _CID list (if present) is
10853 obtained and also checked for an ID match.
10855 Implemented additional support for the PCI _ADR execution: upsearch until
10857 device scope is found before executing _ADR. This allows PCI_Config
10858 operation regions to be declared locally within control methods
10860 PCI device objects.
10862 Fixed a problem with a possible race condition between threads executing
10863 AcpiWalkNamespace and the AML interpreter. This condition was removed by
10864 modifying AcpiWalkNamespace to (by default) ignore all temporary
10866 entries created during any concurrent control method execution. An
10867 additional namespace race condition is known to exist between
10868 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
10871 Restructured the AML ParseLoop function, breaking it into several
10872 subfunctions in order to reduce CPU stack use and improve
10876 AcpiGetHandle: Fix for parameter validation to detect invalid
10878 of prefix handle and pathname. BZ 478
10880 Example Code and Data Size: These are the sizes for the OS-independent
10881 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10882 debug version of the code includes the debug output trace mechanism and
10884 a much larger code and data size.
10887 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10888 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
10890 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
10891 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
10893 2) iASL Compiler/Disassembler and Tools:
10895 Ported the -g option (get local ACPI tables) to the new ACPICA Table
10897 to restore original behavior.
10899 ----------------------------------------
10900 27 September 2006. Summary of changes for version 20060927:
10902 1) ACPI CA Core Subsystem:
10904 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
10905 These functions now use a spinlock for mutual exclusion and the interrupt
10906 level indication flag is not needed.
10908 Fixed a problem with the Global Lock where the lock could appear to be
10909 obtained before it is actually obtained. The global lock semaphore was
10910 inadvertently created with one unit instead of zero units. (BZ 464)
10914 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
10916 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
10918 Example Code and Data Size: These are the sizes for the OS-independent
10919 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10920 debug version of the code includes the debug output trace mechanism and
10922 a much larger code and data size.
10925 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10926 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
10928 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10929 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
10932 2) iASL Compiler/Disassembler and Tools:
10934 Fixed a compilation problem with the pre-defined Resource Descriptor
10936 names where an "object does not exist" error could be incorrectly
10938 if the parent ResourceTemplate pathname places the template within a
10939 different namespace scope than the current scope. (BZ 7212)
10941 Fixed a problem where the compiler could hang after syntax errors
10943 in an ElseIf construct. (BZ 453)
10945 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
10946 operator. An incorrect output filename was produced when this parameter
10948 a null string (""). Now, the original input filename is used as the AML
10949 output filename, with an ".aml" extension.
10951 Implemented a generic batch command mode for the AcpiExec utility
10953 any AML debugger command) (Valery Podrezov).
10955 ----------------------------------------
10956 12 September 2006. Summary of changes for version 20060912:
10958 1) ACPI CA Core Subsystem:
10960 Enhanced the implementation of the "serialized mode" of the interpreter
10961 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
10962 specified, instead of creating a serialization semaphore per control
10964 the interpreter lock is simply no longer released before a blocking
10965 operation during control method execution. This effectively makes the AML
10966 Interpreter single-threaded. The overhead of a semaphore per-method is
10969 Fixed a regression where an error was no longer emitted if a control
10971 attempts to create 2 objects of the same name. This once again returns
10972 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
10974 will dynamically serialize the control method to possible prevent future
10977 Integrated a fix for a problem with PCI Express HID detection in the PCI
10978 Config Space setup procedure. (BZ 7145)
10980 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
10981 AcpiHwInitialize function - the FADT registers are now validated when the
10984 Added two new warnings during FADT verification - 1) if the FADT is
10986 than the largest known FADT version, and 2) if there is a mismatch
10989 32-bit block address and the 64-bit X counterpart (when both are non-
10992 Example Code and Data Size: These are the sizes for the OS-independent
10993 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10994 debug version of the code includes the debug output trace mechanism and
10996 a much larger code and data size.
10999 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
11000 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
11002 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
11003 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
11006 2) iASL Compiler/Disassembler and Tools:
11008 Fixed a problem with the implementation of the Switch() operator where
11010 temporary variable was declared too close to the actual Switch, instead
11012 at method level. This could cause a problem if the Switch() operator is
11013 within a while loop, causing an error on the second iteration. (BZ 460)
11015 Disassembler - fix for error emitted for unknown type for target of scope
11016 operator. Now, ignore it and continue.
11018 Disassembly of an FADT now verifies the input FADT and reports any errors
11019 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
11021 Disassembly of raw data buffers with byte initialization data now
11023 each output line with the current buffer offset.
11025 Disassembly of ASF! table now includes all variable-length data fields at
11026 the end of some of the subtables.
11028 The disassembler now emits a comment if a buffer appears to be a
11029 ResourceTemplate, but cannot be disassembled as such because the EndTag
11031 not appear at the very end of the buffer.
11033 AcpiExec - Added the "-t" command line option to enable the serialized
11035 of the AML interpreter.
11037 ----------------------------------------
11038 31 August 2006. Summary of changes for version 20060831:
11040 1) ACPI CA Core Subsystem:
11042 Miscellaneous fixes for the Table Manager:
11043 - Correctly initialize internal common FADT for all 64-bit "X" fields
11044 - Fixed a couple table mapping issues during table load
11045 - Fixed a couple alignment issues for IA64
11046 - Initialize input array to zero in AcpiInitializeTables
11047 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
11048 AcpiGetTableByIndex
11050 Change for GPE support: when a "wake" GPE is received, all wake GPEs are
11052 immediately disabled to prevent the waking GPE from firing again and to
11053 prevent other wake GPEs from interrupting the wake process.
11055 Added the AcpiGpeCount global that tracks the number of processed GPEs,
11057 be used for debugging systems with a large number of ACPI interrupts.
11059 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
11060 both the ACPICA headers and the disassembler.
11062 Example Code and Data Size: These are the sizes for the OS-independent
11063 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11064 debug version of the code includes the debug output trace mechanism and
11066 a much larger code and data size.
11069 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
11070 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
11072 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
11073 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
11076 2) iASL Compiler/Disassembler and Tools:
11078 Disassembler support for the DMAR ACPI table.
11080 ----------------------------------------
11081 23 August 2006. Summary of changes for version 20060823:
11083 1) ACPI CA Core Subsystem:
11085 The Table Manager component has been completely redesigned and
11086 reimplemented. The new design is much simpler, and reduces the overall
11088 and data size of the kernel-resident ACPICA by approximately 5%. Also, it
11090 now possible to obtain the ACPI tables very early during kernel
11091 initialization, even before dynamic memory management is initialized.
11092 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
11094 Obsolete ACPICA interfaces:
11096 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
11099 - AcpiLoadTable: Not needed.
11100 - AcpiUnloadTable: Not needed.
11102 New ACPICA interfaces:
11104 - AcpiInitializeTables: Must be called before the table manager can be
11106 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
11107 allocated memory after it becomes available.
11108 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
11112 Other ACPICA changes:
11114 - AcpiGetTableHeader returns the actual mapped table header, not a copy.
11116 AcpiOsUnmapMemory to free this mapping.
11117 - AcpiGetTable returns the actual mapped table. The mapping is managed
11118 internally and must not be deleted by the caller. Use of this interface
11119 causes no additional dynamic memory allocation.
11120 - AcpiFindRootPointer: Support for physical addressing has been
11122 it appeared to be unused.
11123 - The interface to AcpiOsMapMemory has changed to be consistent with the
11124 other allocation interfaces.
11125 - The interface to AcpiOsGetRootPointer has changed to eliminate
11128 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
11130 bit platforms. Was previously 64 bits on all platforms.
11131 - The interface to the ACPI Global Lock acquire/release macros have
11133 slightly since ACPICA no longer keeps a local copy of the FACS with a
11134 constructed pointer to the actual global lock.
11136 Porting to the new table manager:
11138 - AcpiInitializeTables: Must be called once, and can be called anytime
11139 during the OS initialization process. It allows the host to specify an
11141 of memory to be used to store the internal version of the RSDT/XSDT (root
11142 table). This allows the host to access ACPI tables before memory
11144 is initialized and running.
11145 - AcpiReallocateRootTable: Can be called after memory management is
11147 to copy the root table to a dynamically allocated array, freeing up the
11148 scratch memory specified in the call to AcpiInitializeTables.
11149 - AcpiSubsystemInitialize: This existing interface is independent of the
11150 Table Manager, and does not have to be called before the Table Manager
11152 be used, it only must be called before the rest of ACPICA can be used.
11153 - ACPI Tables: Some changes have been made to the names and structure of
11155 actbl.h and actbl1.h header files and may require changes to existing
11157 For example, bitfields have been completely removed because of their lack
11159 portability across C compilers.
11160 - Update interfaces to the Global Lock acquire/release macros if local
11161 versions are used. (see acwin.h)
11163 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
11165 New files: tbfind.c
11167 Example Code and Data Size: These are the sizes for the OS-independent
11168 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11169 debug version of the code includes the debug output trace mechanism and
11171 a much larger code and data size.
11174 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
11175 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
11177 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
11178 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
11181 2) iASL Compiler/Disassembler and Tools:
11183 No changes for this release.
11185 ----------------------------------------
11186 21 July 2006. Summary of changes for version 20060721:
11188 1) ACPI CA Core Subsystem:
11190 The full source code for the ASL test suite used to validate the iASL
11191 compiler and the ACPICA core subsystem is being released with the ACPICA
11192 source for the first time. The source is contained in a separate package
11194 consists of over 1100 files that exercise all ASL/AML operators. The
11196 should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
11200 Completed a new design and implementation for support of the ACPI Global
11201 Lock. On the OS side, the global lock is now treated as a standard AML
11202 mutex. Previously, multiple OS threads could "acquire" the global lock
11203 simultaneously. However, this could cause the BIOS to be starved out of
11205 lock - especially in cases such as the Embedded Controller driver where
11206 there is a tight coupling between the OS and the BIOS.
11208 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
11209 The Global Lock interrupt handler no longer queues the execution of a
11210 separate thread to signal the global lock semaphore. Instead, the
11212 is signaled directly from the interrupt handler.
11214 Implemented support within the AML interpreter for package objects that
11215 contain a larger AML length (package list length) than the package
11217 count. In this case, the length of the package is truncated to match the
11218 package element count. Some BIOS code apparently modifies the package
11220 on the fly, and this change supports this behavior. Provides
11222 with the MS AML interpreter. (With assistance from Fiodor Suietov)
11224 Implemented a temporary fix for the BankValue parameter of a Bank Field
11226 support all constant values, now including the Zero and One opcodes.
11227 Evaluation of this parameter must eventually be converted to a full
11229 evaluation. A not-implemented error is now returned (temporarily) for
11231 constant values for this parameter.
11233 Fixed problem reports (Fiodor Suietov) integrated:
11234 - Fix for premature object deletion after CopyObject on Operation Region
11238 Example Code and Data Size: These are the sizes for the OS-independent
11239 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11240 debug version of the code includes the debug output trace mechanism and
11242 a much larger code and data size.
11245 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
11246 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
11248 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
11249 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
11252 2) iASL Compiler/Disassembler and Tools:
11254 No changes for this release.
11256 ----------------------------------------
11257 07 July 2006. Summary of changes for version 20060707:
11259 1) ACPI CA Core Subsystem:
11261 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
11262 that do not allow the initialization of address pointers within packed
11263 structures - even though the hardware itself may support misaligned
11264 transfers. Some of the debug data structures are packed by default to
11267 Added an error message for the case where AcpiOsGetThreadId() returns
11269 A non-zero value is required by the core ACPICA code to ensure the proper
11270 operation of AML mutexes and recursive control methods.
11272 The DSDT is now the only ACPI table that determines whether the AML
11273 interpreter is in 32-bit or 64-bit mode. Not really a functional change,
11275 the hooks for per-table 32/64 switching have been removed from the code.
11277 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
11279 Fixed a possible leak of an OwnerID in the error path of
11280 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
11281 deletion to a single place in AcpiTbUninstallTable to correct possible
11283 when using the AcpiTbDeleteTablesByType interface (with assistance from
11286 Fixed a problem with Serialized control methods where the semaphore
11287 associated with the method could be over-signaled after multiple method
11290 Fixed two issues with the locking of the internal namespace data
11292 Both the Unload() operator and AcpiUnloadTable interface now lock the
11293 namespace during the namespace deletion associated with the table unload
11294 (with assistance from Linn Crosetto.)
11296 Fixed problem reports (Valery Podrezov) integrated:
11297 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
11299 Fixed problem reports (Fiodor Suietov) integrated:
11300 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
11301 - On Address Space handler deletion, needless deactivation call (BZ 374)
11302 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
11304 - Possible memory leak, Notify sub-objects of Processor, Power,
11307 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
11308 - Minimum Length of RSDT should be validated (BZ 379)
11309 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
11311 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
11315 Example Code and Data Size: These are the sizes for the OS-independent
11316 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11317 debug version of the code includes the debug output trace mechanism and
11319 a much larger code and data size.
11322 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
11323 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
11325 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
11326 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
11329 2) iASL Compiler/Disassembler and Tools:
11331 Fixed problem reports:
11332 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
11335 ----------------------------------------
11336 23 June 2006. Summary of changes for version 20060623:
11338 1) ACPI CA Core Subsystem:
11340 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
11341 allows the type to be customized to the host OS for improved efficiency
11342 (since a spinlock is usually a very small object.)
11344 Implemented support for "ignored" bits in the ACPI registers. According
11346 the ACPI specification, these bits should be preserved when writing the
11347 registers via a read/modify/write cycle. There are 3 bits preserved in
11349 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
11351 Implemented the initial deployment of new OSL mutex interfaces. Since
11353 host operating systems have separate mutex and semaphore objects, this
11354 feature was requested. The base code now uses mutexes (and the new mutex
11355 interfaces) wherever a binary semaphore was used previously. However, for
11356 the current release, the mutex interfaces are defined as macros to map
11358 to the existing semaphore interfaces. Therefore, no OSL changes are
11360 at this time. (See acpiosxf.h)
11362 Fixed several problems with the support for the control method SyncLevel
11363 parameter. The SyncLevel now works according to the ACPI specification
11365 in concert with the Mutex SyncLevel parameter, since the current
11367 is a property of the executing thread. Mutual exclusion for control
11369 is now implemented with a mutex instead of a semaphore.
11371 Fixed three instances of the use of the C shift operator in the bitfield
11372 support code (exfldio.c) to avoid the use of a shift value larger than
11374 target data width. The behavior of C compilers is undefined in this case
11376 can cause unpredictable results, and therefore the case must be detected
11378 avoided. (Fiodor Suietov)
11380 Added an info message whenever an SSDT or OEM table is loaded dynamically
11381 via the Load() or LoadTable() ASL operators. This should improve
11383 capability since it will show exactly what tables have been loaded
11385 the tables present in the RSDT/XSDT.)
11387 Example Code and Data Size: These are the sizes for the OS-independent
11388 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11389 debug version of the code includes the debug output trace mechanism and
11391 a much larger code and data size.
11394 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
11395 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
11397 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
11398 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
11401 2) iASL Compiler/Disassembler and Tools:
11403 No changes for this release.
11405 ----------------------------------------
11406 08 June 2006. Summary of changes for version 20060608:
11408 1) ACPI CA Core Subsystem:
11410 Converted the locking mutex used for the ACPI hardware to a spinlock.
11412 change should eliminate all problems caused by attempting to acquire a
11413 semaphore at interrupt level, and it means that all ACPICA external
11414 interfaces that directly access the ACPI hardware can be safely called
11416 interrupt level. OSL code that implements the semaphore interfaces should
11418 able to eliminate any workarounds for being called at interrupt level.
11420 Fixed a regression introduced in 20060526 where the ACPI device
11421 initialization could be prematurely aborted with an AE_NOT_FOUND if a
11423 did not have an optional _INI method.
11425 Fixed an IndexField issue where a write to the Data Register should be
11426 limited in size to the AccessSize (width) of the IndexField itself. (BZ
11430 Fixed problem reports (Valery Podrezov) integrated:
11431 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
11433 Fixed problem reports (Fiodor Suietov) integrated:
11434 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
11436 Removed four global mutexes that were obsolete and were no longer being
11439 Example Code and Data Size: These are the sizes for the OS-independent
11440 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11441 debug version of the code includes the debug output trace mechanism and
11443 a much larger code and data size.
11446 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
11447 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
11449 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
11450 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
11453 2) iASL Compiler/Disassembler and Tools:
11455 Fixed a fault when using -g option (get tables from registry) on Windows
11458 Fixed problem reports integrated:
11459 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
11460 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
11462 - Global table revision override (-r) is ignored (BZ 413)
11464 ----------------------------------------
11465 26 May 2006. Summary of changes for version 20060526:
11467 1) ACPI CA Core Subsystem:
11469 Restructured, flattened, and simplified the internal interfaces for
11470 namespace object evaluation - resulting in smaller code, less CPU stack
11472 and fewer interfaces. (With assistance from Mikhail Kouzmich)
11474 Fixed a problem with the CopyObject operator where the first parameter
11476 not typed correctly for the parser, interpreter, compiler, and
11478 Caused various errors and unexpected behavior.
11480 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
11481 produced incorrect results with some C compilers. Since the behavior of C
11482 compilers when the shift value is larger than the datatype width is
11483 apparently not well defined, the interpreter now detects this condition
11485 simply returns zero as expected in all such cases. (BZ 395)
11487 Fixed problem reports (Valery Podrezov) integrated:
11488 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
11489 - Allow interpreter to handle nested method declarations (BZ 5361)
11491 Fixed problem reports (Fiodor Suietov) integrated:
11492 - AcpiTerminate doesn't free debug memory allocation list objects (BZ
11494 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
11496 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
11497 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
11498 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
11499 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
11500 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
11501 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
11502 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
11504 - Status of the Global Initialization Handler call not used (BZ 366)
11505 - Incorrect object parameter to Global Initialization Handler (BZ 367)
11507 Example Code and Data Size: These are the sizes for the OS-independent
11508 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11509 debug version of the code includes the debug output trace mechanism and
11511 a much larger code and data size.
11514 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
11515 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
11517 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
11518 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
11521 2) iASL Compiler/Disassembler and Tools:
11523 Modified the parser to allow the names IO, DMA, and IRQ to be used as
11524 namespace identifiers with no collision with existing resource descriptor
11525 macro names. This provides compatibility with other ASL compilers and is
11526 most useful for disassembly/recompilation of existing tables without
11528 errors. (With assistance from Thomas Renninger)
11530 Disassembler: fixed an incorrect disassembly problem with the
11531 DataTableRegion and CopyObject operators. Fixed a possible fault during
11532 disassembly of some Alias operators.
11534 ----------------------------------------
11535 12 May 2006. Summary of changes for version 20060512:
11537 1) ACPI CA Core Subsystem:
11539 Replaced the AcpiOsQueueForExecution interface with a new interface named
11540 AcpiOsExecute. The major difference is that the new interface does not
11542 a Priority parameter, this appeared to be useless and has been replaced
11545 Type parameter. The Type tells the host what type of execution is being
11546 requested, such as global lock handler, notify handler, GPE handler, etc.
11547 This allows the host to queue and execute the request as appropriate for
11549 request type, possibly using different work queues and different
11551 for the various request types. This enables fixes for multithreading
11552 deadlock problems such as BZ #5534, and will require changes to all
11554 OS interface layers. (Alexey Starikovskiy and Bob Moore)
11556 Fixed a possible memory leak associated with the support for the so-
11558 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
11561 Fixed a problem with the Load() operator where a table load from an
11562 operation region could overwrite an internal table buffer by up to 7
11564 and cause alignment faults on IPF systems. (With assistance from Luming
11567 Example Code and Data Size: These are the sizes for the OS-independent
11568 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11569 debug version of the code includes the debug output trace mechanism and
11571 a much larger code and data size.
11574 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
11575 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
11577 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
11578 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
11582 2) iASL Compiler/Disassembler and Tools:
11584 Disassembler: Implemented support to cross reference the internal
11586 and automatically generate ASL External() statements for symbols not
11588 within the current table being disassembled. This will simplify the
11589 disassembly and recompilation of interdependent tables such as SSDTs
11591 these statements will no longer have to be added manually.
11593 Disassembler: Implemented experimental support to automatically detect
11594 invocations of external control methods and generate appropriate
11596 statements. This is problematic because the AML cannot be correctly
11598 until the number of arguments for each control method is known.
11600 standalone method invocations and invocations as the source operand of a
11601 Store() statement are supported.
11603 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
11604 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
11605 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
11606 more readable and likely closer to the original ASL source.
11608 ----------------------------------------
11609 21 April 2006. Summary of changes for version 20060421:
11611 1) ACPI CA Core Subsystem:
11613 Removed a device initialization optimization introduced in 20051216 where
11614 the _STA method was not run unless an _INI was also present for the same
11615 device. This optimization could cause problems because it could allow
11617 methods to be run within a not-present device subtree. (If a not-present
11618 device had no _INI, _STA would not be run, the not-present status would
11620 be discovered, and the children of the device would be incorrectly
11623 Implemented a new _STA optimization where namespace subtrees that do not
11624 contain _INI are identified and ignored during device initialization.
11625 Selectively running _STA can significantly improve boot time on large
11626 machines (with assistance from Len Brown.)
11628 Implemented support for the device initialization case where the returned
11629 _STA flags indicate a device not-present but functioning. In this case,
11631 is not run, but the device children are examined for presence, as per the
11632 ACPI specification.
11634 Implemented an additional change to the IndexField support in order to
11635 conform to MS behavior. The value written to the Index Register is not
11636 simply a byte offset, it is a byte offset in units of the access width of
11637 the parent Index Field. (Fiodor Suietov)
11639 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
11640 interface is called during the creation of all AML operation regions, and
11641 allows the host OS to exert control over what addresses it will allow the
11642 AML code to access. Operation Regions whose addresses are disallowed will
11643 cause a runtime exception when they are actually accessed (will not
11645 or abort table loading.) See oswinxf or osunixxf for an example
11648 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
11649 interface allows the host OS to match the various "optional"
11650 interface/behavior strings for the _OSI predefined control method as
11651 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
11652 for an example implementation.
11654 Restructured and corrected various problems in the exception handling
11656 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
11657 (with assistance from Takayoshi Kochi.)
11659 Modified the Linux source converter to ignore quoted string literals
11661 converting identifiers from mixed to lower case. This will correct
11663 with the disassembler and other areas where such strings must not be
11666 The ACPI_FUNCTION_* macros no longer require quotes around the function
11667 name. This allows the Linux source converter to convert the names, now
11669 the converter ignores quoted strings.
11671 Example Code and Data Size: These are the sizes for the OS-independent
11672 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11673 debug version of the code includes the debug output trace mechanism and
11675 a much larger code and data size.
11679 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
11680 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
11682 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
11683 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
11686 2) iASL Compiler/Disassembler and Tools:
11688 Implemented 3 new warnings for iASL, and implemented multiple warning
11692 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
11694 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
11695 check for the possible timeout, a warning is issued.
11697 2) Useless operators: If an ASL operator does not specify an optional
11699 operand and it also does not use the function return value from the
11700 operator, a warning is issued since the operator effectively does
11703 3) Unreferenced objects: If a namespace object is created, but never
11704 referenced, a warning is issued. This is a warning level 2 since there
11706 cases where this is ok, such as when a secondary table is loaded that
11708 the unreferenced objects. Even so, care is taken to only flag objects
11710 don't look like they will ever be used. For example, the reserved methods
11711 (starting with an underscore) are usually not referenced because it is
11712 expected that the OS will invoke them.
11714 ----------------------------------------
11715 31 March 2006. Summary of changes for version 20060331:
11717 1) ACPI CA Core Subsystem:
11719 Implemented header file support for the following additional ACPI tables:
11720 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
11722 all current and known ACPI tables are now defined in the ACPICA headers
11724 are available for use by device drivers and other software.
11726 Implemented support to allow tables that contain ACPI names with invalid
11727 characters to be loaded. Previously, this would cause the table load to
11728 fail, but since there are several known cases of such tables on existing
11729 machines, this change was made to enable ACPI support for them. Also,
11731 matches the behavior of the Microsoft ACPI implementation.
11733 Fixed a couple regressions introduced during the memory optimization in
11735 20060317 release. The namespace node definition required additional
11736 reorganization and an internal datatype that had been changed to 8-bit
11738 restored to 32-bit. (Valery Podrezov)
11740 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
11741 could be passed through to AcpiOsReleaseObject which is unexpected. Such
11742 null pointers are now trapped and ignored, matching the behavior of the
11743 previous implementation before the deployment of AcpiOsReleaseObject.
11744 (Valery Podrezov, Fiodor Suietov)
11746 Fixed a memory mapping leak during the deletion of a SystemMemory
11748 region where a cached memory mapping was not deleted. This became a
11749 noticeable problem for operation regions that are defined within
11751 used control methods. (Dana Meyers)
11753 Reorganized the ACPI table header files into two main files: one for the
11754 ACPI tables consumed by the ACPICA core, and another for the
11756 ACPI tables that are consumed by the drivers and other software. The
11758 FADT definitions were merged into one common section and three different
11759 tables (ACPI 1.0, 1.0+, and 2.0)
11761 Example Code and Data Size: These are the sizes for the OS-independent
11762 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
11763 debug version of the code includes the debug output trace mechanism and
11765 a much larger code and data size.
11768 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
11769 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
11771 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
11772 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
11775 2) iASL Compiler/Disassembler and Tools:
11777 Disassembler: Implemented support to decode and format all non-AML ACPI
11778 tables (tables other than DSDTs and SSDTs.) This includes the new tables
11779 added to the ACPICA headers, therefore all current and known ACPI tables
11783 Disassembler: The change to allow ACPI names with invalid characters also
11784 enables the disassembly of such tables. Invalid characters within names
11786 changed to '*' to make the name printable; the iASL compiler will still
11787 generate an error for such names, however, since this is an invalid ACPI
11790 Implemented an option for AcpiXtract (-a) to extract all tables found in
11792 input file. The default invocation extracts only the DSDTs and SSDTs.
11794 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
11795 makefile for the AcpiXtract utility.
11797 ----------------------------------------
11798 17 March 2006. Summary of changes for version 20060317:
11800 1) ACPI CA Core Subsystem:
11802 Implemented the use of a cache object for all internal namespace nodes.
11803 Since there are about 1000 static nodes in a typical system, this will
11804 decrease memory use for cache implementations that minimize per-
11806 overhead (such as a slab allocator.)
11808 Removed the reference count mechanism for internal namespace nodes, since
11810 was deemed unnecessary. This reduces the size of each namespace node by
11811 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
11813 and 32 bytes for the 64-bit case.
11815 Optimized several internal data structures to reduce object size on 64-
11817 platforms by packing data within the 64-bit alignment. This includes the
11818 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
11819 instances corresponding to the namespace objects.
11821 Added two new strings for the predefined _OSI method: "Windows 2001.1
11823 and "Windows 2006".
11825 Split the allocation tracking mechanism out to a separate file, from
11826 utalloc.c to uttrack.c. This mechanism appears to be only useful for
11827 application-level code. Kernels may wish to not include uttrack.c in
11830 Removed all remnants of the obsolete ACPI_REPORT_* macros and the
11832 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
11835 Code and Data Size: These are the sizes for the acpica.lib produced by
11837 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11839 driver or OSPM code. The debug version of the code includes the debug
11841 trace mechanism and has a much larger code and data size. Note that these
11842 values will vary depending on the efficiency of the compiler and the
11843 compiler options used during generation.
11846 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11847 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
11849 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
11850 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
11853 2) iASL Compiler/Disassembler and Tools:
11855 Implemented an ANSI C version of the acpixtract utility. This version
11857 automatically extract the DSDT and all SSDTs from the input acpidump text
11858 file and dump the binary output to separate files. It can also display a
11859 summary of the input file including the headers for each table found and
11860 will extract any single ACPI table, with any signature. (See
11861 source/tools/acpixtract)
11863 ----------------------------------------
11864 10 March 2006. Summary of changes for version 20060310:
11866 1) ACPI CA Core Subsystem:
11868 Tagged all external interfaces to the subsystem with the new
11869 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
11871 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
11872 macro. The default definition is NULL.
11874 Added the ACPI_THREAD_ID type for the return value from
11876 This allows the host to define this as necessary to simplify kernel
11877 integration. The default definition is ACPI_NATIVE_UINT.
11879 Fixed two interpreter problems related to error processing, the deletion
11881 objects, and placing invalid pointers onto the internal operator result
11882 stack. BZ 6028, 6151 (Valery Podrezov)
11884 Increased the reference count threshold where a warning is emitted for
11886 reference counts in order to eliminate unnecessary warnings on systems
11888 large namespaces (especially 64-bit.) Increased the value from 0x400 to
11891 Due to universal disagreement as to the meaning of the 'c' in the
11893 function, the ACPI_MEM_CALLOCATE macro has been renamed to
11894 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
11895 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
11898 Code and Data Size: These are the sizes for the acpica.lib produced by
11900 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11902 driver or OSPM code. The debug version of the code includes the debug
11904 trace mechanism and has a much larger code and data size. Note that these
11905 values will vary depending on the efficiency of the compiler and the
11906 compiler options used during generation.
11909 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
11910 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
11912 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11913 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
11916 2) iASL Compiler/Disassembler:
11918 Disassembler: implemented support for symbolic resource descriptor
11919 references. If a CreateXxxxField operator references a fixed offset
11922 resource descriptor, a name is assigned to the descriptor and the offset
11924 translated to the appropriate resource tag and pathname. The addition of
11925 this support brings the disassembled code very close to the original ASL
11926 source code and helps eliminate run-time errors when the disassembled
11928 is modified (and recompiled) in such a way as to invalidate the original
11931 Implemented support for a Descriptor Name as the last parameter to the
11933 Register() macro. This parameter was inadvertently left out of the ACPI
11934 specification, and will be added for ACPI 3.0b.
11936 Fixed a problem where the use of the "_OSI" string (versus the full path
11937 "\_OSI") caused an internal compiler error. ("No back ptr to op")
11939 Fixed a problem with the error message that occurs when an invalid string
11941 used for a _HID object (such as one with an embedded asterisk:
11943 The correct message is now displayed.
11945 ----------------------------------------
11946 17 February 2006. Summary of changes for version 20060217:
11948 1) ACPI CA Core Subsystem:
11950 Implemented a change to the IndexField support to match the behavior of
11952 Microsoft AML interpreter. The value written to the Index register is now
11954 byte offset, no longer an index based upon the width of the Data
11956 This should fix IndexField problems seen on some machines where the Data
11957 register is not exactly one byte wide. The ACPI specification will be
11958 clarified on this point.
11960 Fixed a problem where several resource descriptor types could overrun the
11961 internal descriptor buffer due to size miscalculation: VendorShort,
11962 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
11963 affect all platforms.
11965 Fixed a problem where individual resource descriptors were misaligned
11967 the internal buffer, causing alignment faults on IA64 platforms.
11969 Code and Data Size: These are the sizes for the acpica.lib produced by
11971 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11973 driver or OSPM code. The debug version of the code includes the debug
11975 trace mechanism and has a much larger code and data size. Note that these
11976 values will vary depending on the efficiency of the compiler and the
11977 compiler options used during generation.
11980 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11981 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
11983 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
11984 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
11987 2) iASL Compiler/Disassembler:
11989 Implemented support for new reserved names: _WDG and _WED are Microsoft
11990 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
11991 defined method (Throttling Depth Limit.)
11993 Fixed a problem where a zero-length VendorShort or VendorLong resource
11994 descriptor was incorrectly emitted as a descriptor of length one.
11996 ----------------------------------------
11997 10 February 2006. Summary of changes for version 20060210:
11999 1) ACPI CA Core Subsystem:
12001 Removed a couple of extraneous ACPI_ERROR messages that appeared during
12002 normal execution. These became apparent after the conversion from
12005 Fixed a problem where the CreateField operator could hang if the BitIndex
12007 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
12009 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
12010 failed with an exception. This also fixes a couple of related RefOf and
12011 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
12013 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
12015 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
12019 Implemented a memory cleanup at the end of the execution of each
12021 of an AML While() loop, preventing the accumulation of outstanding
12023 (Valery Podrezov, BZ 5427)
12025 Eliminated a chunk of duplicate code in the object resolution code.
12029 Fixed several warnings during the 64-bit code generation.
12031 The AcpiSrc source code conversion tool now inserts one line of
12033 after an if() statement that is followed immediately by a comment,
12035 readability of the Linux code.
12037 Code and Data Size: The current and previous library sizes for the core
12038 subsystem are shown below. These are the code and data sizes for the
12039 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12041 values do not include any ACPI driver or OSPM code. The debug version of
12043 code includes the debug output trace mechanism and has a much larger code
12044 and data size. Note that these values will vary depending on the
12046 of the compiler and the compiler options used during generation.
12049 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
12050 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
12052 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
12053 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
12056 2) iASL Compiler/Disassembler:
12058 Fixed a problem with the disassembly of a BankField operator with a
12060 expression for the BankValue parameter.
12062 ----------------------------------------
12063 27 January 2006. Summary of changes for version 20060127:
12065 1) ACPI CA Core Subsystem:
12067 Implemented support in the Resource Manager to allow unresolved
12069 references within resource package objects for the _PRT method. This
12071 is in addition to the previously implemented unresolved reference support
12072 within the AML parser. If the interpreter slack mode is enabled, these
12073 unresolved references will be passed through to the caller as a NULL
12077 Implemented and deployed new macros and functions for error and warning
12078 messages across the subsystem. These macros are simpler and generate less
12079 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
12080 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
12081 macros remain defined to allow ACPI drivers time to migrate to the new
12084 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
12086 Acquire/Release Lock OSL interfaces.
12088 Fixed a problem where Alias ASL operators are sometimes not correctly
12089 resolved, in both the interpreter and the iASL compiler.
12091 Fixed several problems with the implementation of the
12092 ConcatenateResTemplate
12093 ASL operator. As per the ACPI specification, zero length buffers are now
12094 treated as a single EndTag. One-length buffers always cause a fatal
12095 exception. Non-zero length buffers that do not end with a full 2-byte
12097 cause a fatal exception.
12099 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
12100 interface. (With assistance from Thomas Renninger)
12102 Code and Data Size: The current and previous library sizes for the core
12103 subsystem are shown below. These are the code and data sizes for the
12104 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12106 values do not include any ACPI driver or OSPM code. The debug version of
12108 code includes the debug output trace mechanism and has a much larger code
12109 and data size. Note that these values will vary depending on the
12111 of the compiler and the compiler options used during generation.
12114 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
12115 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
12117 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
12118 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
12121 2) iASL Compiler/Disassembler:
12123 Fixed an internal error that was generated for any forward references to
12127 ----------------------------------------
12128 13 January 2006. Summary of changes for version 20060113:
12130 1) ACPI CA Core Subsystem:
12132 Added 2006 copyright to all module headers and signons. This affects
12133 virtually every file in the ACPICA core subsystem, iASL compiler, and the
12136 Enhanced the ACPICA error reporting in order to simplify user migration
12138 the non-debug version of ACPICA. Replaced all instances of the
12139 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
12141 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
12142 respectively. This preserves all error and warning messages in the non-
12144 version of the ACPICA code (this has been referred to as the "debug lite"
12145 option.) Over 200 cases were converted to create a total of over 380
12146 error/warning messages across the ACPICA code. This increases the code
12148 data size of the default non-debug version of the code somewhat (about
12150 but all error/warning reporting may be disabled if desired (and code
12151 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
12152 configuration option. The size of the debug version of ACPICA remains
12156 Fixed a memory leak within the AML Debugger "Set" command. One object was
12157 not properly deleted for every successful invocation of the command.
12159 Code and Data Size: The current and previous library sizes for the core
12160 subsystem are shown below. These are the code and data sizes for the
12161 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12163 values do not include any ACPI driver or OSPM code. The debug version of
12165 code includes the debug output trace mechanism and has a much larger code
12166 and data size. Note that these values will vary depending on the
12168 of the compiler and the compiler options used during generation.
12171 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
12172 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
12174 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
12175 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
12178 2) iASL Compiler/Disassembler:
12180 The compiler now officially supports the ACPI 3.0a specification that was
12181 released on December 30, 2005. (Specification is available at
12184 ----------------------------------------
12185 16 December 2005. Summary of changes for version 20051216:
12187 1) ACPI CA Core Subsystem:
12189 Implemented optional support to allow unresolved names within ASL Package
12190 objects. A null object is inserted in the package when a named reference
12191 cannot be located in the current namespace. Enabled via the interpreter
12192 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
12194 that contain such code.
12196 Implemented an optimization to the initialization sequence that can
12198 boot time. During ACPI device initialization, the _STA method is now run
12200 and only if the _INI method exists. The _STA method is used to determine
12202 the device is present; An _INI can only be run if _STA returns present,
12204 it is a waste of time to run the _STA method if the _INI does not exist.
12205 (Prototype and assistance from Dong Wei)
12207 Implemented use of the C99 uintptr_t for the pointer casting macros if it
12209 available in the current compiler. Otherwise, the default (void *) cast
12213 Fixed some possible memory leaks found within the execution path of the
12214 Break, Continue, If, and CreateField operators. (Valery Podrezov)
12216 Fixed a problem introduced in the 20051202 release where an exception is
12217 generated during method execution if a control method attempts to declare
12220 Moved resource descriptor string constants that are used by both the AML
12221 disassembler and AML debugger to the common utilities directory so that
12222 these components are independent.
12224 Implemented support in the AcpiExec utility (-e switch) to globally
12226 exceptions during control method execution (method is not aborted.)
12228 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
12231 Code and Data Size: The current and previous library sizes for the core
12232 subsystem are shown below. These are the code and data sizes for the
12233 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12235 values do not include any ACPI driver or OSPM code. The debug version of
12237 code includes the debug output trace mechanism and has a much larger code
12238 and data size. Note that these values will vary depending on the
12240 of the compiler and the compiler options used during generation.
12243 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
12244 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
12246 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
12247 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
12250 2) iASL Compiler/Disassembler:
12252 Fixed a problem where a CPU stack overflow fault could occur if a
12254 method call was made from within a Return statement.
12256 ----------------------------------------
12257 02 December 2005. Summary of changes for version 20051202:
12259 1) ACPI CA Core Subsystem:
12261 Modified the parsing of control methods to no longer create namespace
12262 objects during the first pass of the parse. Objects are now created only
12263 during the execute phase, at the moment the namespace creation operator
12265 encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
12267 should eliminate ALREADY_EXISTS exceptions seen on some machines where
12268 reentrant control methods are protected by an AML mutex. The mutex will
12270 correctly block multiple threads from attempting to create the same
12274 Increased the number of available Owner Ids for namespace object tracking
12275 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
12277 some machines with a large number of ACPI tables (either static or
12280 Fixed a problem with the AcpiExec utility where a fault could occur when
12282 -b switch (batch mode) is used.
12284 Enhanced the namespace dump routine to output the owner ID for each
12287 Code and Data Size: The current and previous library sizes for the core
12288 subsystem are shown below. These are the code and data sizes for the
12289 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12291 values do not include any ACPI driver or OSPM code. The debug version of
12293 code includes the debug output trace mechanism and has a much larger code
12294 and data size. Note that these values will vary depending on the
12296 of the compiler and the compiler options used during generation.
12299 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
12300 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
12302 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
12303 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
12306 2) iASL Compiler/Disassembler:
12308 Fixed a parse error during compilation of certain Switch/Case constructs.
12310 simplify the parse, the grammar now allows for multiple Default
12312 and this error is now detected and flagged during the analysis phase.
12314 Disassembler: The disassembly now includes the contents of the original
12315 table header within a comment at the start of the file. This includes the
12316 name and version of the original ASL compiler.
12318 ----------------------------------------
12319 17 November 2005. Summary of changes for version 20051117:
12321 1) ACPI CA Core Subsystem:
12323 Fixed a problem in the AML parser where the method thread count could be
12324 decremented below zero if any errors occurred during the method parse
12326 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
12328 This also fixed a related regression with the mechanism that detects and
12329 corrects methods that cannot properly handle reentrancy (related to the
12330 deployment of the new OwnerId mechanism.)
12332 Eliminated the pre-parsing of control methods (to detect errors) during
12333 table load. Related to the problem above, this was causing unwind issues
12335 any errors occurred during the parse, and it seemed to be overkill. A
12337 load should not be aborted if there are problems with any single control
12338 method, thus rendering this feature rather pointless.
12340 Fixed a problem with the new table-driven resource manager where an
12342 buffer overflow could occur for small resource templates.
12344 Implemented a new external interface, AcpiGetVendorResource. This
12346 will find and return a vendor-defined resource descriptor within a _CRS
12348 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
12351 Removed the length limit (200) on string objects as per the upcoming ACPI
12352 3.0A specification. This affects the following areas of the interpreter:
12354 any implicit conversion of a Buffer to a String, 2) a String object
12356 of the ASL Concatenate operator, 3) the String object result of the ASL
12359 Fixed a problem in the Windows OS interface layer (OSL) where a
12361 on a semaphore object would incorrectly timeout. This allows the
12362 multithreading features of the AcpiExec utility to work properly under
12365 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
12366 the recently added file named "utresrc.c".
12368 Code and Data Size: The current and previous library sizes for the core
12369 subsystem are shown below. These are the code and data sizes for the
12370 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12372 values do not include any ACPI driver or OSPM code. The debug version of
12374 code includes the debug output trace mechanism and has a much larger code
12375 and data size. Note that these values will vary depending on the
12377 of the compiler and the compiler options used during generation.
12380 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
12381 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
12383 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
12384 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
12387 2) iASL Compiler/Disassembler:
12389 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
12390 specification. For the iASL compiler, this means that string literals
12392 the source ASL can be of any length.
12394 Enhanced the listing output to dump the AML code for resource descriptors
12395 immediately after the ASL code for each descriptor, instead of in a block
12397 the end of the entire resource template.
12399 Enhanced the compiler debug output to dump the entire original parse tree
12400 constructed during the parse phase, before any transforms are applied to
12402 tree. The transformed tree is dumped also.
12404 ----------------------------------------
12405 02 November 2005. Summary of changes for version 20051102:
12407 1) ACPI CA Core Subsystem:
12409 Modified the subsystem initialization sequence to improve GPE support.
12411 GPE initialization has been split into two parts in order to defer
12413 of the _PRW methods (Power Resources for Wake) until after the hardware
12415 fully initialized and the SCI handler is installed. This allows the _PRW
12416 methods to access fields protected by the Global Lock. This will fix
12418 where a NO_GLOBAL_LOCK exception has been seen during initialization.
12420 Converted the ACPI internal object disassemble and display code within
12422 AML debugger to fully table-driven operation, reducing code size and
12423 increasing maintainability.
12425 Fixed a regression with the ConcatenateResTemplate() ASL operator
12427 in the 20051021 release.
12429 Implemented support for "local" internal ACPI object types within the
12430 debugger "Object" command and the AcpiWalkNamespace external interfaces.
12431 These local types include RegionFields, BankFields, IndexFields, Alias,
12435 Moved common AML resource handling code into a new file, "utresrc.c".
12437 code is shared by both the Resource Manager and the AML Debugger.
12439 Code and Data Size: The current and previous library sizes for the core
12440 subsystem are shown below. These are the code and data sizes for the
12441 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12443 values do not include any ACPI driver or OSPM code. The debug version of
12445 code includes the debug output trace mechanism and has a much larger code
12446 and data size. Note that these values will vary depending on the
12448 of the compiler and the compiler options used during generation.
12451 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
12452 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
12454 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
12455 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
12458 2) iASL Compiler/Disassembler:
12460 Fixed a problem with very large initializer lists (more than 4000
12462 for both Buffer and Package objects where the parse stack could overflow.
12464 Enhanced the pre-compile source code scan for non-ASCII characters to
12466 characters within comment fields. The scan is now always performed and is
12468 longer optional, detecting invalid characters within a source file
12469 immediately rather than during the parse phase or later.
12471 Enhanced the ASL grammar definition to force early reductions on all
12473 style grammar elements so that the overall parse stack usage is greatly
12474 reduced. This should improve performance and reduce the possibility of
12478 Eliminated all reduce/reduce conflicts in the iASL parser generation.
12480 with the addition of a %expected statement, the compiler generates from
12481 source with no warnings.
12483 Fixed a possible segment fault in the disassembler if the input filename
12484 does not contain a "dot" extension (Thomas Renninger).
12486 ----------------------------------------
12487 21 October 2005. Summary of changes for version 20051021:
12489 1) ACPI CA Core Subsystem:
12491 Implemented support for the EM64T and other x86-64 processors. This
12492 essentially entails recognizing that these processors support non-aligned
12493 memory transfers. Previously, all 64-bit processors were assumed to lack
12494 hardware support for non-aligned transfers.
12496 Completed conversion of the Resource Manager to nearly full table-driven
12497 operation. Specifically, the resource conversion code (convert AML to
12498 internal format and the reverse) and the debug code to dump internal
12499 resource descriptors are fully table-driven, reducing code and data size
12501 improving maintainability.
12503 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
12505 on 64-bit processors instead of a fixed 32-bit word. (With assistance
12507 Alexey Starikovskiy)
12509 Implemented support within the resource conversion code for the Type-
12510 Specific byte within the various ACPI 3.0 *WordSpace macros.
12512 Fixed some issues within the resource conversion code for the type-
12514 flags for both Memory and I/O address resource descriptors. For Memory,
12515 implemented support for the MTP and TTP flags. For I/O, split the TRS and
12516 TTP flags into two separate fields.
12518 Code and Data Size: The current and previous library sizes for the core
12519 subsystem are shown below. These are the code and data sizes for the
12520 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12522 values do not include any ACPI driver or OSPM code. The debug version of
12524 code includes the debug output trace mechanism and has a much larger code
12525 and data size. Note that these values will vary depending on the
12527 of the compiler and the compiler options used during generation.
12530 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
12531 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
12533 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
12534 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
12538 2) iASL Compiler/Disassembler:
12540 Relaxed a compiler restriction that disallowed a ResourceIndex byte if
12542 corresponding ResourceSource string was not also present in a resource
12543 descriptor declaration. This restriction caused problems with existing
12544 AML/ASL code that includes the Index byte without the string. When such
12546 was disassembled, it could not be compiled without modification. Further,
12547 the modified code created a resource template with a different size than
12549 original, breaking code that used fixed offsets into the resource
12553 Removed a recent feature of the disassembler to ignore a lone
12555 byte. This byte is now emitted if present so that the exact AML can be
12556 reproduced when the disassembled code is recompiled.
12558 Improved comments and text alignment for the resource descriptor code
12559 emitted by the disassembler.
12561 Implemented disassembler support for the ACPI 3.0 AccessSize field within
12563 Register() resource descriptor.
12565 ----------------------------------------
12566 30 September 2005. Summary of changes for version 20050930:
12568 1) ACPI CA Core Subsystem:
12570 Completed a major overhaul of the Resource Manager code - specifically,
12571 optimizations in the area of the AML/internal resource conversion code.
12573 code has been optimized to simplify and eliminate duplicated code, CPU
12575 use has been decreased by optimizing function parameters and local
12576 variables, and naming conventions across the manager have been
12578 for clarity and ease of maintenance (this includes function, parameter,
12579 variable, and struct/typedef names.) The update may force changes in some
12580 driver code, depending on how resources are handled by the host OS.
12582 All Resource Manager dispatch and information tables have been moved to a
12583 single location for clarity and ease of maintenance. One new file was
12584 created, named "rsinfo.c".
12586 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
12587 guarantee that the argument is not evaluated twice, making them less
12589 to macro side-effects. However, since there exists the possibility of
12590 additional stack use if a particular compiler cannot optimize them (such
12592 in the debug generation case), the original macros are optionally
12594 Note that some invocations of the return_VALUE macro may now cause size
12595 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
12597 eliminate these. (From Randy Dunlap)
12599 Implemented a new mechanism to enable debug tracing for individual
12601 methods. A new external interface, AcpiDebugTrace, is provided to enable
12602 this mechanism. The intent is to allow the host OS to easily enable and
12603 disable tracing for problematic control methods. This interface can be
12604 easily exposed to a user or debugger interface if desired. See the file
12605 psxface.c for details.
12607 AcpiUtCallocate will now return a valid pointer if a length of zero is
12608 specified - a length of one is used and a warning is issued. This matches
12609 the behavior of AcpiUtAllocate.
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: 77.5K Code, 12.0K Data, 89.5K Total
12624 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
12626 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
12627 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
12630 2) iASL Compiler/Disassembler:
12632 A remark is issued if the effective compile-time length of a package or
12633 buffer is zero. Previously, this was a warning.
12635 ----------------------------------------
12636 16 September 2005. Summary of changes for version 20050916:
12638 1) ACPI CA Core Subsystem:
12640 Fixed a problem within the Resource Manager where support for the Generic
12641 Register descriptor was not fully implemented. This descriptor is now
12643 recognized, parsed, disassembled, and displayed.
12645 Completely restructured the Resource Manager code to utilize table-driven
12646 dispatch and lookup, eliminating many of the large switch() statements.
12648 reduces overall subsystem code size and code complexity. Affects the
12649 resource parsing and construction, disassembly, and debug dump output.
12651 Cleaned up and restructured the debug dump output for all resource
12652 descriptors. Improved readability of the output and reduced code size.
12654 Fixed a problem where changes to internal data structures caused the
12655 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
12657 Code and Data Size: The current and previous library sizes for the core
12658 subsystem are shown below. These are the code and data sizes for the
12659 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
12661 values do not include any ACPI driver or OSPM code. The debug version of
12663 code includes the debug output trace mechanism and has a much larger code
12664 and data size. Note that these values will vary depending on the
12666 of the compiler and the compiler options used during generation.
12669 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
12670 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
12672 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
12673 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
12676 2) iASL Compiler/Disassembler:
12678 Updated the disassembler to automatically insert an EndDependentFn()
12680 into the ASL stream if this macro is missing in the original AML code,
12681 simplifying compilation of the resulting ASL module.
12683 Fixed a problem in the disassembler where a disassembled ResourceSource
12684 string (within a large resource descriptor) was not surrounded by quotes
12686 not followed by a comma, causing errors when the resulting ASL module was
12687 compiled. Also, escape sequences within a ResourceSource string are now
12688 handled correctly (especially "\\")
12690 ----------------------------------------
12691 02 September 2005. Summary of changes for version 20050902:
12693 1) ACPI CA Core Subsystem:
12695 Fixed a problem with the internal Owner ID allocation and deallocation
12696 mechanisms for control method execution and recursive method invocation.
12697 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
12698 messages seen on some systems. Recursive method invocation depth is
12699 currently limited to 255. (Alexey Starikovskiy)
12701 Completely eliminated all vestiges of support for the "module-level
12702 executable code" until this support is fully implemented and debugged.
12704 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
12705 some systems that invoke this support.
12707 Fixed a problem within the resource manager code where the transaction
12709 for a 64-bit address descriptor were handled incorrectly in the type-
12710 specific flag byte.
12712 Consolidated duplicate code within the address descriptor resource
12714 code, reducing overall subsystem code size.
12716 Fixed a fault when using the AML debugger "disassemble" command to
12717 disassemble individual control methods.
12719 Removed references to the "release_current" directory within the Unix
12722 Code and Data Size: The current and previous core subsystem library sizes
12723 are shown below. These are the code and data sizes for the acpica.lib
12724 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
12725 include any ACPI driver or OSPM code. The debug version of the code
12727 the debug output trace mechanism and has a much larger code and data
12729 Note that these values will vary depending on the efficiency of the
12731 and the compiler options used during generation.
12734 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12735 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
12737 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
12738 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
12741 2) iASL Compiler/Disassembler:
12743 Implemented an error check for illegal duplicate values in the interrupt
12745 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
12748 Implemented error checking for the Irq() and IrqNoFlags() macros to
12750 too many values in the interrupt list (16 max) and invalid values in the
12751 list (range 0 - 15)
12753 The maximum length string literal within an ASL file is now restricted to
12754 200 characters as per the ACPI specification.
12756 Fixed a fault when using the -ln option (generate namespace listing).
12758 Implemented an error check to determine if a DescriptorName within a
12759 resource descriptor has already been used within the current scope.
12761 ----------------------------------------
12762 15 August 2005. Summary of changes for version 20050815:
12764 1) ACPI CA Core Subsystem:
12766 Implemented a full bytewise compare to determine if a table load request
12768 attempting to load a duplicate table. The compare is performed if the
12770 signatures and table lengths match. This will allow different tables with
12771 the same OEM Table ID and revision to be loaded - probably against the
12773 specification, but discovered in the field nonetheless.
12775 Added the changes.txt logfile to each of the zipped release packages.
12777 Code and Data Size: Current and previous core subsystem library sizes are
12778 shown below. These are the code and data sizes for the acpica.lib
12780 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12781 any ACPI driver or OSPM code. The debug version of the code includes the
12782 debug output trace mechanism and has a much larger code and data size.
12784 that these values will vary depending on the efficiency of the compiler
12786 the compiler options used during generation.
12789 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12790 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
12792 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12793 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
12796 2) iASL Compiler/Disassembler:
12798 Fixed a problem where incorrect AML code could be generated for Package
12799 objects if optimization is disabled (via the -oa switch).
12801 Fixed a problem with where incorrect AML code is generated for variable-
12802 length packages when the package length is not specified and the number
12804 initializer values is greater than 255.
12807 ----------------------------------------
12808 29 July 2005. Summary of changes for version 20050729:
12810 1) ACPI CA Core Subsystem:
12812 Implemented support to ignore an attempt to install/load a particular
12814 table more than once. Apparently there exists BIOS code that repeatedly
12815 attempts to load the same SSDT upon certain events. With assistance from
12816 Venkatesh Pallipadi.
12818 Restructured the main interface to the AML parser in order to correctly
12819 handle all exceptional conditions. This will prevent leakage of the
12821 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
12823 machines. With assistance from Alexey Starikovskiy.
12825 Support for "module level code" has been disabled in this version due to
12827 number of issues that have appeared on various machines. The support can
12829 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
12830 compilation. When the issues are fully resolved, the code will be enabled
12834 Modified the internal functions for debug print support to define the
12835 FunctionName parameter as a (const char *) for compatibility with
12837 built-in macros such as __FUNCTION__, etc.
12839 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
12841 Implemented support to display an object count summary for the AML
12843 commands Object and Methods.
12845 Code and Data Size: Current and previous core subsystem library sizes are
12846 shown below. These are the code and data sizes for the acpica.lib
12848 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12849 any ACPI driver or OSPM code. The debug version of the code includes the
12850 debug output trace mechanism and has a much larger code and data size.
12852 that these values will vary depending on the efficiency of the compiler
12854 the compiler options used during generation.
12857 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
12858 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
12860 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
12861 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
12864 2) iASL Compiler/Disassembler:
12866 Fixed a regression that appeared in the 20050708 version of the compiler
12867 where an error message was inadvertently emitted for invocations of the
12869 reserved control method.
12871 ----------------------------------------
12872 08 July 2005. Summary of changes for version 20050708:
12874 1) ACPI CA Core Subsystem:
12876 The use of the CPU stack in the debug version of the subsystem has been
12877 considerably reduced. Previously, a debug structure was declared in every
12878 function that used the debug macros. This structure has been removed in
12879 favor of declaring the individual elements as parameters to the debug
12880 functions. This reduces the cumulative stack use during nested execution
12882 ACPI function calls at the cost of a small increase in the code size of
12884 debug version of the subsystem. With assistance from Alexey Starikovskiy
12888 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
12889 headers to define a macro that will return the current function name at
12890 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
12892 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
12893 compiler-dependent header, the function name is saved on the CPU stack
12895 pointer per function.) This mechanism is used because apparently there
12896 exists no standard ANSI-C defined macro that that returns the function
12899 Redesigned and reimplemented the "Owner ID" mechanism used to track
12900 namespace objects created/deleted by ACPI tables and control method
12901 execution. A bitmap is now used to allocate and free the IDs, thus
12903 the wraparound problem present in the previous implementation. The size
12905 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
12908 Removed the UINT32_BIT and UINT16_BIT types that were used for the
12910 flag definitions within the headers for the predefined ACPI tables. These
12911 have been replaced by UINT8_BIT in order to increase the code portability
12913 the subsystem. If the use of UINT8 remains a problem, we may be forced to
12914 eliminate bitfields entirely because of a lack of portability.
12916 Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
12918 is a frequently used function and this improvement increases the
12920 of the entire subsystem (Alexey Starikovskiy).
12922 Fixed several possible memory leaks and the inverse - premature object
12923 deletion (Alexey Starikovskiy).
12925 Code and Data Size: Current and previous core subsystem library sizes are
12926 shown below. These are the code and data sizes for the acpica.lib
12928 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12929 any ACPI driver or OSPM code. The debug version of the code includes the
12930 debug output trace mechanism and has a much larger code and data size.
12932 that these values will vary depending on the efficiency of the compiler
12934 the compiler options used during generation.
12937 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
12938 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
12940 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
12941 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
12943 ----------------------------------------
12944 24 June 2005. Summary of changes for version 20050624:
12946 1) ACPI CA Core Subsystem:
12948 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
12949 the host-defined cache object. This allows the OSL implementation to
12951 and type this object in any manner desired, simplifying the OSL
12952 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
12953 Linux, and should be defined in the OS-specific header file for other
12954 operating systems as required.
12956 Changed the interface to AcpiOsAcquireObject to directly return the
12957 requested object as the function return (instead of ACPI_STATUS.) This
12958 change was made for performance reasons, since this is the purpose of the
12959 interface in the first place. AcpiOsAcquireObject is now similar to the
12960 AcpiOsAllocate interface.
12962 Implemented a new AML debugger command named Businfo. This command
12964 information about all devices that have an associate _PRT object. The
12966 _HID, _UID, and _CID are displayed for these devices.
12968 Modified the initialization sequence in AcpiInitializeSubsystem to call
12970 OSL interface AcpiOslInitialize first, before any local initialization.
12972 change was required because the global initialization now calls OSL
12975 Enhanced the Dump command to display the entire contents of Package
12977 (including all sub-objects and their values.)
12979 Restructured the code base to split some files because of size and/or
12980 because the code logically belonged in a separate file. New files are
12982 below. All makefiles and project files included in the ACPI CA release
12985 utilities/utcache.c /* Local cache interfaces */
12986 utilities/utmutex.c /* Local mutex support */
12987 utilities/utstate.c /* State object support */
12988 interpreter/parser/psloop.c /* Main AML parse loop */
12990 Code and Data Size: Current and previous core subsystem library sizes are
12991 shown below. These are the code and data sizes for the acpica.lib
12993 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12994 any ACPI driver or OSPM code. The debug version of the code includes the
12995 debug output trace mechanism and has a much larger code and data size.
12997 that these values will vary depending on the efficiency of the compiler
12999 the compiler options used during generation.
13002 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
13003 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
13005 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
13006 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
13009 2) iASL Compiler/Disassembler:
13011 Fixed a regression introduced in version 20050513 where the use of a
13013 object within a Case() statement caused a compile time exception. The
13014 original behavior has been restored (a Match() operator is emitted.)
13016 ----------------------------------------
13017 17 June 2005. Summary of changes for version 20050617:
13019 1) ACPI CA Core Subsystem:
13021 Moved the object cache operations into the OS interface layer (OSL) to
13023 the host OS to handle these operations if desired (for example, the Linux
13024 OSL will invoke the slab allocator). This support is optional; the
13026 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
13028 code in the ACPI CA core. The new OSL interfaces are shown below. See
13029 utalloc.c for an example implementation, and acpiosxf.h for the exact
13030 interface definitions. With assistance from Alexey Starikovskiy.
13034 AcpiOsAcquireObject
13035 AcpiOsReleaseObject
13037 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
13039 and restore a flags parameter. This fits better with many OS lock models.
13040 Note: the current execution state (interrupt handler or not) is no longer
13041 passed to these interfaces. If necessary, the OSL must determine this
13043 by itself, a simple and fast operation. With assistance from Alexey
13046 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
13047 present if the revision of the RSDP was 2 or greater. According to the
13049 specification, the XSDT is optional in all cases, and the table manager
13050 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
13051 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
13055 Fixed an interpreter problem with the Mid() operator in the case of an
13057 string where the resulting output string is of zero length. It now
13059 returns a valid, null terminated string object instead of a string object
13060 with a null pointer.
13062 Fixed a problem with the control method argument handling to allow a
13064 to an Arg object that already contains an object of type Device. The
13066 object is now correctly overwritten. Previously, an error was returned.
13069 Enhanced the debugger Find command to emit object values in addition to
13071 found object pathnames. The output format is the same as the dump
13075 Enhanced the debugger Set command. It now has the ability to set the
13077 of any Named integer object in the namespace (Previously, only method
13079 and args could be set.)
13081 Code and Data Size: Current and previous core subsystem library sizes are
13082 shown below. These are the code and data sizes for the acpica.lib
13084 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13085 any ACPI driver or OSPM code. The debug version of the code includes the
13086 debug output trace mechanism and has a much larger code and data size.
13088 that these values will vary depending on the efficiency of the compiler
13090 the compiler options used during generation.
13093 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
13094 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
13096 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
13097 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
13100 2) iASL Compiler/Disassembler:
13102 Fixed a regression in the disassembler where if/else/while constructs
13104 output incorrectly. This problem was introduced in the previous release
13105 (20050526). This problem also affected the single-step disassembly in the
13108 Fixed a problem where compiling the reserved _OSI method would randomly
13110 rarely) produce compile errors.
13112 Enhanced the disassembler to emit compilable code in the face of
13114 AML resource descriptors. If the optional ResourceSourceIndex is present,
13115 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
13116 disassembly. Otherwise, the resulting code cannot be compiled without
13119 ----------------------------------------
13120 26 May 2005. Summary of changes for version 20050526:
13122 1) ACPI CA Core Subsystem:
13124 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
13125 the module level (not within a control method.) These opcodes are
13127 exactly once at the time the table is loaded. This type of code was legal
13129 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
13131 order to provide backwards compatibility with earlier BIOS
13133 This eliminates the "Encountered executable code at module level" warning
13134 that was previously generated upon detection of such code.
13136 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
13137 inadvertently be generated during the lookup of namespace objects in the
13138 second pass parse of ACPI tables and control methods. It appears that
13140 problem could occur during the resolution of forward references to
13144 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
13145 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
13146 allows the deadlock detection debug code to be compiled out in the normal
13147 case, improving mutex performance (and overall subsystem performance)
13150 Implemented a handful of miscellaneous fixes for possible memory leaks on
13151 error conditions and error handling control paths. These fixes were
13152 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
13154 Added a check for a null RSDT pointer in AcpiGetFirmwareTable
13156 to prevent a fault in this error case.
13158 Code and Data Size: Current and previous core subsystem library sizes are
13159 shown below. These are the code and data sizes for the acpica.lib
13161 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13162 any ACPI driver or OSPM code. The debug version of the code includes the
13163 debug output trace mechanism and has a much larger code and data size.
13165 that these values will vary depending on the efficiency of the compiler
13167 the compiler options used during generation.
13170 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
13171 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
13173 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
13174 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
13177 2) iASL Compiler/Disassembler:
13179 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
13180 the module level (not within a control method.) These operators will be
13181 executed once at the time the table is loaded. This type of code was
13183 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
13184 compiler in order to provide backwards compatibility with earlier BIOS
13188 The ACPI integer width (specified via the table revision ID or the -r
13189 override, 32 or 64 bits) is now used internally during compile-time
13191 folding to ensure that constants are truncated to 32 bits if necessary.
13192 Previously, the revision ID value was only emitted in the AML table
13195 An error message is now generated for the Mutex and Method operators if
13197 SyncLevel parameter is outside the legal range of 0 through 15.
13199 Fixed a problem with the Method operator ParameterTypes list handling
13201 3.0). Previously, more than 2 types or 2 arguments generated a syntax
13203 The actual underlying implementation of method argument typechecking is
13204 still under development, however.
13206 ----------------------------------------
13207 13 May 2005. Summary of changes for version 20050513:
13209 1) ACPI CA Core Subsystem:
13211 Implemented support for PCI Express root bridges -- added support for
13213 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
13215 The interpreter now automatically truncates incoming 64-bit constants to
13217 bits if currently executing out of a 32-bit ACPI table (Revision < 2).
13219 also affects the iASL compiler constant folding. (Note: as per below, the
13220 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
13222 Fixed a problem where string and buffer objects with "static" pointers
13223 (pointers to initialization data within an ACPI table) were not handled
13224 consistently. The internal object copy operation now always copies the
13226 to a newly allocated buffer, regardless of whether the source object is
13229 Fixed a problem with the FromBCD operator where an implicit result
13230 conversion was improperly performed while storing the result to the
13232 operand. Since this is an "explicit conversion" operator, the implicit
13233 conversion should never be performed on the output.
13235 Fixed a problem with the CopyObject operator where a copy to an existing
13236 named object did not always completely overwrite the existing object
13238 at name. Specifically, a buffer-to-buffer copy did not delete the
13242 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
13244 structs for consistency.
13246 Code and Data Size: Current and previous core subsystem library sizes are
13247 shown below. These are the code and data sizes for the acpica.lib
13249 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13250 any ACPI driver or OSPM code. The debug version of the code includes the
13251 debug output trace mechanism and has a much larger code and data size.
13253 that these values will vary depending on the efficiency of the compiler
13255 the compiler options used during generation.
13258 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
13259 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
13260 Current Release: (Same sizes)
13261 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
13262 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
13265 2) iASL Compiler/Disassembler:
13267 The compiler now emits a warning if an attempt is made to generate a 64-
13269 integer constant from within a 32-bit ACPI table (Revision < 2). The
13271 is truncated to 32 bits.
13273 Fixed a problem with large package objects: if the static length of the
13274 package is greater than 255, the "variable length package" opcode is
13275 emitted. Previously, this caused an error. This requires an update to the
13276 ACPI spec, since it currently (incorrectly) states that packages larger
13278 255 elements are not allowed.
13280 The disassembler now correctly handles variable length packages and
13282 larger than 255 elements.
13284 ----------------------------------------
13285 08 April 2005. Summary of changes for version 20050408:
13287 1) ACPI CA Core Subsystem:
13289 Fixed three cases in the interpreter where an "index" argument to an ASL
13290 function was still (internally) 32 bits instead of the required 64 bits.
13291 This was the Index argument to the Index, Mid, and Match operators.
13293 The "strupr" function is now permanently local (AcpiUtStrupr), since this
13295 not a POSIX-defined function and not present in most kernel-level C
13296 libraries. All references to the C library strupr function have been
13300 Completed the deployment of static functions/prototypes. All prototypes
13302 the static attribute have been moved from the headers to the owning C
13305 Implemented an extract option (-e) for the AcpiBin utility (AML binary
13306 utility). This option allows the utility to extract individual ACPI
13308 from the output of AcpiDmp. It provides the same functionality of the
13309 acpixtract.pl perl script without the worry of setting the correct perl
13310 options. AcpiBin runs on Windows and has not yet been generated/validated
13312 the Linux/Unix environment (but should be soon).
13314 Updated and fixed the table dump option for AcpiBin (-d). This option
13315 converts a single ACPI table to a hex/ascii file, similar to the output
13319 Code and Data Size: Current and previous core subsystem library sizes are
13320 shown below. These are the code and data sizes for the acpica.lib
13322 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13323 any ACPI driver or OSPM code. The debug version of the code includes the
13324 debug output trace mechanism and has a much larger code and data size.
13326 that these values will vary depending on the efficiency of the compiler
13328 the compiler options used during generation.
13331 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
13332 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
13334 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
13335 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
13338 2) iASL Compiler/Disassembler:
13340 Disassembler fix: Added a check to ensure that the table length found in
13342 ACPI table header within the input file is not longer than the actual
13344 file size. This indicates some kind of file or table corruption.
13346 ----------------------------------------
13347 29 March 2005. Summary of changes for version 20050329:
13349 1) ACPI CA Core Subsystem:
13351 An error is now generated if an attempt is made to create a Buffer Field
13353 length zero (A CreateField with a length operand of zero.)
13355 The interpreter now issues a warning whenever executable code at the
13357 level is detected during ACPI table load. This will give some idea of the
13358 prevalence of this type of code.
13360 Implemented support for references to named objects (other than control
13361 methods) within package objects.
13363 Enhanced package object output for the debug object. Package objects are
13365 completely dumped, showing all elements.
13367 Enhanced miscellaneous object output for the debug object. Any object can
13368 now be written to the debug object (for example, a device object can be
13369 written, and the type of the object will be displayed.)
13371 The "static" qualifier has been added to all local functions across both
13373 core subsystem and the iASL compiler.
13375 The number of "long" lines (> 80 chars) within the source has been
13376 significantly reduced, by about 1/3.
13378 Cleaned up all header files to ensure that all CA/iASL functions are
13379 prototyped (even static functions) and the formatting is consistent.
13381 Two new header files have been added, acopcode.h and acnames.h.
13383 Removed several obsolete functions that were no longer used.
13385 Code and Data Size: Current and previous core subsystem library sizes are
13386 shown below. These are the code and data sizes for the acpica.lib
13388 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13389 any ACPI driver or OSPM code. The debug version of the code includes the
13390 debug output trace mechanism and has a much larger code and data size.
13392 that these values will vary depending on the efficiency of the compiler
13394 the compiler options used during generation.
13397 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13398 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
13400 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
13401 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
13405 2) iASL Compiler/Disassembler:
13407 Fixed a problem with the resource descriptor generation/support. For the
13408 ResourceSourceIndex and the ResourceSource fields, both must be present,
13410 both must be not present - can't have one without the other.
13412 The compiler now returns non-zero from the main procedure if any errors
13414 occurred during the compilation.
13417 ----------------------------------------
13418 09 March 2005. Summary of changes for version 20050309:
13420 1) ACPI CA Core Subsystem:
13422 The string-to-buffer implicit conversion code has been modified again
13424 a change to the ACPI specification. In order to match the behavior of
13426 other major ACPI implementation, the target buffer is no longer truncated
13428 the source string is smaller than an existing target buffer. This change
13429 requires an update to the ACPI spec, and should eliminate the recent
13430 AE_AML_BUFFER_LIMIT issues.
13432 The "implicit return" support was rewritten to a new algorithm that
13434 the general case. Rather than attempt to determine when a method is about
13436 exit, the result of every ASL operator is saved momentarily until the
13438 next ASL operator is executed. Therefore, no matter how the method exits,
13439 there will always be a saved implicit return value. This feature is only
13440 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
13442 AE_AML_NO_RETURN_VALUE errors when enabled.
13444 Implemented implicit conversion support for the predicate (operand) of
13446 If, Else, and While operators. String and Buffer arguments are
13448 converted to Integers.
13450 Changed the string-to-integer conversion behavior to match the new ACPI
13451 errata: "If no integer object exists, a new integer is created. The ASCII
13452 string is interpreted as a hexadecimal constant. Each string character is
13453 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
13454 with the first character as the most significant digit, and ending with
13456 first non-hexadecimal character or end-of-string." This means that the
13458 non-hex character terminates the conversion and this is the code that was
13461 Fixed a problem where the ObjectType operator would fail (fault) when
13463 on an Index of a Package which pointed to a null package element. The
13464 operator now properly returns zero (Uninitialized) in this case.
13466 Fixed a problem where the While operator used excessive memory by not
13467 properly popping the result stack during execution. There was no memory
13469 after execution, however. (Code provided by Valery Podrezov.)
13471 Fixed a problem where references to control methods within Package
13473 caused the method to be invoked, instead of producing a reference object
13474 pointing to the method.
13476 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
13478 improve performance and reduce code size. (Code provided by Alexey
13481 Code and Data Size: Current and previous core subsystem library sizes are
13482 shown below. These are the code and data sizes for the acpica.lib
13484 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13485 any ACPI driver or OSPM code. The debug version of the code includes the
13486 debug output trace mechanism and has a much larger code and data size.
13488 that these values will vary depending on the efficiency of the compiler
13490 the compiler options used during generation.
13493 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13494 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
13496 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13497 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
13500 2) iASL Compiler/Disassembler:
13502 Fixed a problem with the Return operator with no arguments. Since the AML
13503 grammar for the byte encoding requires an operand for the Return opcode,
13505 compiler now emits a Return(Zero) for this case. An ACPI specification
13506 update has been written for this case.
13508 For tables other than the DSDT, namepath optimization is automatically
13509 disabled. This is because SSDTs can be loaded anywhere in the namespace,
13511 compiler has no knowledge of where, and thus cannot optimize namepaths.
13513 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
13514 inadvertently omitted from the ACPI specification, and will require an
13515 update to the spec.
13517 The source file scan for ASCII characters is now optional (-a). This
13519 was made because some vendors place non-ascii characters within comments.
13520 However, the scan is simply a brute-force byte compare to ensure all
13521 characters in the file are in the range 0x00 to 0x7F.
13523 Fixed a problem with the CondRefOf operator where the compiler was
13524 inappropriately checking for the existence of the target. Since the point
13526 the operator is to check for the existence of the target at run-time, the
13527 compiler no longer checks for the target existence.
13529 Fixed a problem where errors generated from the internal AML interpreter
13530 during constant folding were not handled properly, causing a fault.
13532 Fixed a problem with overly aggressive range checking for the Stall
13533 operator. The valid range (max 255) is now only checked if the operand is
13535 type Integer. All other operand types cannot be statically checked.
13537 Fixed a problem where control method references within the RefOf,
13539 and ObjectType operators were not treated properly. They are now treated
13541 actual references, not method invocations.
13543 Fixed and enhanced the "list namespace" option (-ln). This option was
13545 a number of releases ago.
13547 Improved error handling for the Field, IndexField, and BankField
13549 The compiler now cleanly reports and recovers from errors in the field
13550 component (FieldUnit) list.
13552 Fixed a disassembler problem where the optional ResourceDescriptor fields
13553 TRS and TTP were not always handled correctly.
13555 Disassembler - Comments in output now use "//" instead of "/*"
13557 ----------------------------------------
13558 28 February 2005. Summary of changes for version 20050228:
13560 1) ACPI CA Core Subsystem:
13562 Fixed a problem where the result of an Index() operator (an object
13563 reference) must increment the reference count on the target object for
13565 life of the object reference.
13567 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
13568 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
13570 resource descriptors.
13572 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
13573 Space Descriptor" string, indicating interpreter support for the
13577 Implemented header support for the new ACPI 3.0 FADT flag bits.
13579 Implemented header support for the new ACPI 3.0 PCI Express bits for the
13581 status/enable registers.
13583 Updated header support for the MADT processor local Apic struct and MADT
13584 platform interrupt source struct for new ACPI 3.0 fields.
13586 Implemented header support for the SRAT and SLIT ACPI tables.
13588 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
13592 Code and Data Size: Current and previous core subsystem library sizes are
13593 shown below. These are the code and data sizes for the acpica.lib
13595 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13596 any ACPI driver or OSPM code. The debug version of the code includes the
13597 debug output trace mechanism and has a much larger code and data size.
13599 that these values will vary depending on the efficiency of the compiler
13601 the compiler options used during generation.
13604 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
13605 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
13607 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13608 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
13611 2) iASL Compiler/Disassembler:
13613 Fixed a problem with the internal 64-bit String-to-integer conversion
13615 strings less than two characters long.
13617 Fixed a problem with constant folding where the result of the Index()
13618 operator can not be considered a constant. This means that Index() cannot
13620 a type3 opcode and this will require an update to the ACPI specification.
13622 Disassembler: Implemented support for the TTP, MTP, and TRS resource
13623 descriptor fields. These fields were inadvertently ignored and not output
13625 the disassembly of the resource descriptor.
13628 ----------------------------------------
13629 11 February 2005. Summary of changes for version 20050211:
13631 1) ACPI CA Core Subsystem:
13633 Implemented ACPI 3.0 support for implicit conversion within the Match()
13634 operator. MatchObjects can now be of type integer, buffer, or string
13636 of just type integer. Package elements are implicitly converted to the
13638 of the MatchObject. This change aligns the behavior of Match() with the
13639 behavior of the other logical operators (LLess(), etc.) It also requires
13641 errata change to the ACPI specification as this support was intended for
13642 ACPI 3.0, but was inadvertently omitted.
13644 Fixed a problem with the internal implicit "to buffer" conversion.
13646 that are converted to buffers will cause buffer truncation if the string
13648 smaller than the target buffer. Integers that are converted to buffers
13650 not cause buffer truncation, only zero extension (both as per the ACPI
13651 spec.) The problem was introduced when code was added to truncate the
13652 buffer, but this should not be performed in all cases, only the string
13655 Fixed a problem with the Buffer and Package operators where the
13657 would get confused if two such operators were used as operands to an ASL
13658 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
13659 stack was not being popped after the execution of these operators,
13661 in an AE_NO_RETURN_VALUE exception.
13663 Fixed a problem with constructs of the form Store(Index(...),...). The
13664 reference object returned from Index was inadvertently resolved to an
13666 value. This problem was introduced in version 20050114 when the behavior
13668 Store() was modified to restrict the object types that can be used as the
13669 source operand (to match the ACPI specification.)
13671 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
13673 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
13675 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
13677 Code and Data Size: Current and previous core subsystem library sizes are
13678 shown below. These are the code and data sizes for the acpica.lib
13680 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13681 any ACPI driver or OSPM code. The debug version of the code includes the
13682 debug output trace mechanism and has a much larger code and data size.
13684 that these values will vary depending on the efficiency of the compiler
13686 the compiler options used during generation.
13689 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
13690 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
13692 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
13693 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
13696 2) iASL Compiler/Disassembler:
13698 Fixed a code generation problem in the constant folding optimization code
13699 where incorrect code was generated if a constant was reduced to a buffer
13700 object (i.e., a reduced type 5 opcode.)
13702 Fixed a typechecking problem for the ToBuffer operator. Caused by an
13703 incorrect return type in the internal opcode information table.
13705 ----------------------------------------
13706 25 January 2005. Summary of changes for version 20050125:
13708 1) ACPI CA Core Subsystem:
13710 Fixed a recently introduced problem with the Global Lock where the
13711 underlying semaphore was not created. This problem was introduced in
13712 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
13713 Acquire() operation on _GL.
13715 The local object cache is now optional, and is disabled by default. Both
13716 AcpiExec and the iASL compiler enable the cache because they run in user
13717 mode and this enhances their performance. #define
13718 ACPI_ENABLE_OBJECT_CACHE
13719 to enable the local cache.
13721 Fixed an issue in the internal function AcpiUtEvaluateObject concerning
13723 optional "implicit return" support where an error was returned if no
13725 object was expected, but one was implicitly returned. AE_OK is now
13727 in this case and the implicitly returned object is deleted.
13728 AcpiUtEvaluateObject is only occasionally used, and only to execute
13730 methods such as _STA and _INI where the return type is known up front.
13732 Fixed a few issues with the internal convert-to-integer code. It now
13734 an error if an attempt is made to convert a null string, a string of only
13735 blanks/tabs, or a zero-length buffer. This affects both implicit
13737 and explicit conversion via the ToInteger() operator.
13739 The internal debug code in AcpiUtAcquireMutex has been commented out. It
13741 not needed for normal operation and should increase the performance of
13743 entire subsystem. The code remains in case it is needed for debug
13747 The AcpiExec source and makefile are included in the Unix/Linux package
13751 Code and Data Size: Current and previous core subsystem library sizes are
13752 shown below. These are the code and data sizes for the acpica.lib
13754 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13755 any ACPI driver or OSPM code. The debug version of the code includes the
13756 debug output trace mechanism and has a much larger code and data size.
13758 that these values will vary depending on the efficiency of the compiler
13760 the compiler options used during generation.
13763 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
13764 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
13766 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
13767 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
13769 2) iASL Compiler/Disassembler:
13771 Switch/Case support: A warning is now issued if the type of the Switch
13773 cannot be determined at compile time. For example, Switch(Arg0) will
13774 generate the warning, and the type is assumed to be an integer. As per
13776 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
13780 Switch/Case support: Implemented support for buffer and string objects as
13781 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
13782 buffers and strings.
13784 Switch/Case support: The emitted code for the LEqual() comparisons now
13786 the switch value as the first operand, not the second. The case value is
13788 the second operand, and this allows the case value to be implicitly
13789 converted to the type of the switch value, not the other way around.
13791 Switch/Case support: Temporary variables are now emitted immediately
13793 the control method, not at the global level. This means that there are
13795 36 temps available per-method, not 36 temps per-module as was the case
13797 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
13799 ----------------------------------------
13800 14 January 2005. Summary of changes for version 20050114:
13802 Added 2005 copyright to all module headers. This affects every module in
13803 the core subsystem, iASL compiler, and the utilities.
13805 1) ACPI CA Core Subsystem:
13807 Fixed an issue with the String-to-Buffer conversion code where the string
13808 null terminator was not included in the buffer after conversion, but
13810 is existing ASL that assumes the string null terminator is included. This
13812 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
13813 introduced in the previous version when the code was updated to correctly
13814 set the converted buffer size as per the ACPI specification. The ACPI
13816 is ambiguous and will be updated to specify that the null terminator must
13818 included in the converted buffer. This also affects the ToBuffer() ASL
13821 Fixed a problem with the Mid() ASL/AML operator where it did not work
13822 correctly on Buffer objects. Newly created sub-buffers were not being
13827 Fixed a problem in AcpiTbFindTable where incorrect string compares were
13828 performed on the OemId and OemTableId table header fields. These fields
13830 not null terminated, so strncmp is now used instead of strcmp.
13832 Implemented a restriction on the Store() ASL/AML operator to align the
13833 behavior with the ACPI specification. Previously, any object could be
13835 as the source operand. Now, the only objects that may be used are
13837 Buffers, Strings, Packages, Object References, and DDB Handles. If
13838 necessary, the original behavior can be restored by enabling the
13839 EnableInterpreterSlack flag.
13841 Enhanced the optional "implicit return" support to allow an implicit
13843 value from methods that are invoked externally via the AcpiEvaluateObject
13844 interface. This enables implicit returns from the _STA and _INI methods,
13847 Changed the Revision() ASL/AML operator to return the current version of
13849 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
13851 the supported ACPI version (This is the function of the _REV method).
13853 Updated the _REV predefined method to return the currently supported
13857 Implemented batch mode option for the AcpiExec utility (-b).
13859 Code and Data Size: Current and previous core subsystem library sizes are
13860 shown below. These are the code and data sizes for the acpica.lib
13862 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13863 any ACPI driver or OSPM code. The debug version of the code includes the
13864 debug output trace mechanism and has a much larger code and data size.
13866 that these values will vary depending on the efficiency of the compiler
13868 the compiler options used during generation.
13871 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13872 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
13874 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
13875 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
13877 ----------------------------------------
13878 10 December 2004. Summary of changes for version 20041210:
13880 ACPI 3.0 support is nearing completion in both the iASL compiler and the
13881 ACPI CA core subsystem.
13883 1) ACPI CA Core Subsystem:
13885 Fixed a problem in the ToDecimalString operator where the resulting
13887 length was incorrectly calculated. The length is now calculated exactly,
13888 eliminating incorrect AE_STRING_LIMIT exceptions.
13890 Fixed a problem in the ToHexString operator to allow a maximum 200
13892 string to be produced.
13894 Fixed a problem in the internal string-to-buffer and buffer-to-buffer
13896 routine where the length of the resulting buffer was not truncated to the
13897 new size (if the target buffer already existed).
13899 Code and Data Size: Current and previous core subsystem library sizes are
13900 shown below. These are the code and data sizes for the acpica.lib
13902 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13903 any ACPI driver or OSPM code. The debug version of the code includes the
13904 debug output trace mechanism and has a much larger code and data size.
13906 that these values will vary depending on the efficiency of the compiler
13908 the compiler options used during generation.
13911 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13912 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
13914 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13915 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
13918 2) iASL Compiler/Disassembler:
13920 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
13921 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
13922 Includes support in the disassembler.
13924 Implemented support for the new (ACPI 3.0) parameter to the Register
13928 Fixed a problem where the _HE resource name for the Interrupt macro was
13929 referencing bit 0 instead of bit 1.
13931 Implemented check for maximum 255 interrupts in the Interrupt macro.
13933 Fixed a problem with the predefined resource descriptor names where
13934 incorrect AML code was generated if the offset within the resource buffer
13935 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
13936 but did not update the surrounding package lengths.
13938 Changes to the Dma macro: All channels within the channel list must be
13940 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
13941 optional (default is BusMaster).
13943 Implemented check for maximum 7 data bytes for the VendorShort macro.
13945 The ReadWrite parameter is now optional for the Memory32 and similar
13948 ----------------------------------------
13949 03 December 2004. Summary of changes for version 20041203:
13951 1) ACPI CA Core Subsystem:
13953 The low-level field insertion/extraction code (exfldio) has been
13955 rewritten to eliminate unnecessary complexity, bugs, and boundary
13958 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
13960 operators where the input operand could be inadvertently deleted if no
13961 conversion was necessary (e.g., if the input to ToInteger was an Integer
13964 Fixed a problem with the ToDecimalString and ToHexString where an
13966 exception code was returned if the resulting string would be > 200 chars.
13967 AE_STRING_LIMIT is now returned.
13969 Fixed a problem with the Concatenate operator where AE_OK was always
13970 returned, even if the operation failed.
13972 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
13973 semaphores to be allocated.
13975 Code and Data Size: Current and previous core subsystem library sizes are
13976 shown below. These are the code and data sizes for the acpica.lib
13978 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13979 any ACPI driver or OSPM code. The debug version of the code includes the
13980 debug output trace mechanism and has a much larger code and data size.
13982 that these values will vary depending on the efficiency of the compiler
13984 the compiler options used during generation.
13987 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13988 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13990 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13991 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
13994 2) iASL Compiler/Disassembler:
13996 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
13997 recently introduced in 20041119.
13999 Fixed a problem with the ToUUID macro where the upper nybble of each
14001 byte was inadvertently set to zero.
14003 ----------------------------------------
14004 19 November 2004. Summary of changes for version 20041119:
14006 1) ACPI CA Core Subsystem:
14008 Fixed a problem in the internal ConvertToInteger routine where new
14010 were not truncated to 32 bits for 32-bit ACPI tables. This routine
14012 buffers and strings to integers.
14014 Implemented support to store a value to an Index() on a String object.
14016 is an ACPI 2.0 feature that had not yet been implemented.
14018 Implemented new behavior for storing objects to individual package
14020 (via the Index() operator). The previous behavior was to invoke the
14022 conversion rules if an object was already present at the index. The new
14023 behavior is to simply delete any existing object and directly store the
14025 object. Although the ACPI specification seems unclear on this subject,
14027 ACPI implementations behave in this manner. (This is the root of the
14028 AE_BAD_HEX_CONSTANT issue.)
14030 Modified the RSDP memory scan mechanism to support the extended checksum
14032 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
14033 RSDP signature is found with a valid checksum.
14035 Code and Data Size: Current and previous core subsystem library sizes are
14036 shown below. These are the code and data sizes for the acpica.lib
14038 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14039 any ACPI driver or OSPM code. The debug version of the code includes the
14040 debug output trace mechanism and has a much larger code and data size.
14042 that these values will vary depending on the efficiency of the compiler
14044 the compiler options used during generation.
14047 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
14048 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
14050 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
14051 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
14054 2) iASL Compiler/Disassembler:
14056 Fixed a missing semicolon in the aslcompiler.y file.
14058 ----------------------------------------
14059 05 November 2004. Summary of changes for version 20041105:
14061 1) ACPI CA Core Subsystem:
14063 Implemented support for FADT revision 2. This was an interim table
14065 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
14067 Implemented optional support to allow uninitialized LocalX and ArgX
14068 variables in a control method. The variables are initialized to an
14070 object with a value of zero. This support is enabled by setting the
14071 AcpiGbl_EnableInterpreterSlack flag to TRUE.
14073 Implemented support for Integer objects for the SizeOf operator. Either
14075 or 8 is returned, depending on the current integer size (32-bit or 64-
14077 depending on the parent table revision).
14079 Fixed a problem in the implementation of the SizeOf and ObjectType
14081 where the operand was resolved to a value too early, causing incorrect
14082 return values for some objects.
14084 Fixed some possible memory leaks during exceptional conditions.
14086 Code and Data Size: Current and previous core subsystem library sizes are
14087 shown below. These are the code and data sizes for the acpica.lib
14089 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14090 any ACPI driver or OSPM code. The debug version of the code includes the
14091 debug output trace mechanism and has a much larger code and data size.
14093 that these values will vary depending on the efficiency of the compiler
14095 the compiler options used during generation.
14098 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
14099 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
14101 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
14102 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
14105 2) iASL Compiler/Disassembler:
14107 Implemented support for all ACPI 3.0 reserved names and methods.
14109 Implemented all ACPI 3.0 grammar elements in the front-end, including
14110 support for semicolons.
14112 Implemented the ACPI 3.0 Function() and ToUUID() macros
14114 Fixed a problem in the disassembler where a Scope() operator would not be
14115 emitted properly if the target of the scope was in another table.
14117 ----------------------------------------
14118 15 October 2004. Summary of changes for version 20041015:
14120 Note: ACPI CA is currently undergoing an in-depth and complete formal
14121 evaluation to test/verify the following areas. Other suggestions are
14122 welcome. This will result in an increase in the frequency of releases and
14123 the number of bug fixes in the next few months.
14124 - Functional tests for all ASL/AML operators
14125 - All implicit/explicit type conversions
14126 - Bit fields and operation regions
14127 - 64-bit math support and 32-bit-only "truncated" math support
14128 - Exceptional conditions, both compiler and interpreter
14129 - Dynamic object deletion and memory leaks
14130 - ACPI 3.0 support when implemented
14131 - External interfaces to the ACPI subsystem
14134 1) ACPI CA Core Subsystem:
14136 Fixed two alignment issues on 64-bit platforms - within debug statements
14138 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
14140 field within the non-aligned ACPI generic address structure.
14142 Fixed a problem in the Increment and Decrement operators where incorrect
14143 operand resolution could result in the inadvertent modification of the
14144 original integer when the integer is passed into another method as an
14145 argument and the arg is then incremented/decremented.
14147 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
14149 BCD number were truncated during conversion.
14151 Fixed a problem in the ToDecimal operator where the length of the
14153 string could be set incorrectly too long if the input operand was a
14157 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
14159 within a buffer would prematurely terminate a compare between buffer
14162 Added a check for string overflow (>200 characters as per the ACPI
14163 specification) during the Concatenate operator with two string operands.
14165 Code and Data Size: Current and previous core subsystem library sizes are
14166 shown below. These are the code and data sizes for the acpica.lib
14168 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14169 any ACPI driver or OSPM code. The debug version of the code includes the
14170 debug output trace mechanism and has a much larger code and data size.
14172 that these values will vary depending on the efficiency of the compiler
14174 the compiler options used during generation.
14177 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
14178 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
14180 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
14181 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
14185 2) iASL Compiler/Disassembler:
14187 Allow the use of the ObjectType operator on uninitialized Locals and Args
14188 (returns 0 as per the ACPI specification).
14190 Fixed a problem where the compiler would fault if there was a syntax
14192 in the FieldName of all of the various CreateXXXField operators.
14194 Disallow the use of lower case letters within the EISAID macro, as per
14196 ACPI specification. All EISAID strings must be of the form "UUUNNNN"
14198 U is an uppercase letter and N is a hex digit.
14201 ----------------------------------------
14202 06 October 2004. Summary of changes for version 20041006:
14204 1) ACPI CA Core Subsystem:
14206 Implemented support for the ACPI 3.0 Timer operator. This ASL function
14207 implements a 64-bit timer with 100 nanosecond granularity.
14209 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
14210 implement the ACPI 3.0 Timer operator. This allows the host OS to
14212 the timer with the best clock available. Also, it keeps the core
14214 out of the clock handling business, since the host OS (usually) performs
14217 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
14218 functions use a 64-bit address which is part of the packed ACPI Generic
14219 Address Structure. Since the structure is non-aligned, the alignment
14221 are now used to extract the address to a local variable before use.
14223 Fixed a problem where the ToInteger operator assumed all input strings
14225 hexadecimal. The operator now handles both decimal strings and hex
14227 (prefixed with "0x").
14229 Fixed a problem where the string length in the string object created as a
14230 result of the internal ConvertToString procedure could be incorrect. This
14231 potentially affected all implicit conversions and also the
14233 and ToHexString operators.
14235 Fixed two problems in the ToString operator. If the length parameter was
14236 zero, an incorrect string object was created and the value of the input
14237 length parameter was inadvertently changed from zero to Ones.
14239 Fixed a problem where the optional ResourceSource string in the
14241 resource macro was ignored.
14243 Simplified the interfaces to the internal division functions, reducing
14245 size and complexity.
14247 Code and Data Size: Current and previous core subsystem library sizes are
14248 shown below. These are the code and data sizes for the acpica.lib
14250 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14251 any ACPI driver or OSPM code. The debug version of the code includes the
14252 debug output trace mechanism and has a much larger code and data size.
14254 that these values will vary depending on the efficiency of the compiler
14256 the compiler options used during generation.
14259 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
14260 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
14262 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
14263 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
14266 2) iASL Compiler/Disassembler:
14268 Implemented support for the ACPI 3.0 Timer operator.
14270 Fixed a problem where the Default() operator was inadvertently ignored in
14272 Switch/Case block. This was a problem in the translation of the Switch
14273 statement to If...Else pairs.
14275 Added support to allow a standalone Return operator, with no parentheses
14279 Fixed a problem with code generation for the ElseIf operator where the
14280 translated Else...If parse tree was improperly constructed leading to the
14283 ----------------------------------------
14284 22 September 2004. Summary of changes for version 20040922:
14286 1) ACPI CA Core Subsystem:
14288 Fixed a problem with the implementation of the LNot() operator where
14290 was not returned for the TRUE case. Changed the code to return Ones
14292 of (!Arg) which was usually 1. This change affects iASL constant folding
14294 this operator also.
14296 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was
14298 initialized properly -- Now zero the entire buffer in this case where the
14299 buffer already exists.
14301 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
14302 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
14303 related code considerably. This will require changes/updates to all OS
14304 interface layers (OSLs.)
14306 Implemented a new external interface, AcpiInstallExceptionHandler, to
14308 a system exception handler to be installed. This handler is invoked upon
14310 run-time exception that occurs during control method execution.
14312 Added support for the DSDT in AcpiTbFindTable. This allows the
14313 DataTableRegion() operator to access the local copy of the DSDT.
14315 Code and Data Size: Current and previous core subsystem library sizes are
14316 shown below. These are the code and data sizes for the acpica.lib
14318 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14319 any ACPI driver or OSPM code. The debug version of the code includes the
14320 debug output trace mechanism and has a much larger code and data size.
14322 that these values will vary depending on the efficiency of the compiler
14324 the compiler options used during generation.
14327 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
14328 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
14330 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
14331 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
14334 2) iASL Compiler/Disassembler:
14336 Fixed a problem with constant folding and the LNot operator. LNot was
14337 returning 1 in the TRUE case, not Ones as per the ACPI specification.
14339 could result in the generation of an incorrect folded/reduced constant.
14341 End-Of-File is now allowed within a "//"-style comment. A parse error no
14342 longer occurs if such a comment is at the very end of the input ASL
14346 Implemented the "-r" option to override the Revision in the table header.
14347 The initial use of this option will be to simplify the evaluation of the
14349 interpreter by allowing a single ASL source module to be compiled for
14351 32-bit or 64-bit integers.
14354 ----------------------------------------
14355 27 August 2004. Summary of changes for version 20040827:
14357 1) ACPI CA Core Subsystem:
14359 - Implemented support for implicit object conversion in the non-numeric
14360 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual,
14362 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
14363 the second operand is implicitly converted on the fly to match the type
14365 the first operand. For example:
14367 LEqual (Source1, Source2)
14369 Source1 and Source2 must each evaluate to an integer, a string, or a
14371 The data type of Source1 dictates the required type of Source2. Source2
14373 implicitly converted if necessary to match the type of Source1.
14375 - Updated and corrected the behavior of the string conversion support.
14377 rules concerning conversion of buffers to strings (according to the ACPI
14378 specification) are as follows:
14380 ToDecimalString - explicit byte-wise conversion of buffer to string of
14381 decimal values (0-255) separated by commas. ToHexString - explicit byte-
14383 conversion of buffer to string of hex values (0-FF) separated by commas.
14384 ToString - explicit byte-wise conversion of buffer to string. Byte-by-
14386 copy with no transform except NULL terminated. Any other implicit buffer-
14388 string conversion - byte-wise conversion of buffer to string of hex
14390 (0-FF) separated by spaces.
14392 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
14394 - Fixed a problem in AcpiNsGetPathnameLength where the returned length
14396 one byte too short in the case of a node in the root scope. This could
14397 cause a fault during debug output.
14399 - Code and Data Size: Current and previous core subsystem library sizes
14401 shown below. These are the code and data sizes for the acpica.lib
14403 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14404 any ACPI driver or OSPM code. The debug version of the code includes the
14405 debug output trace mechanism and has a much larger code and data size.
14407 that these values will vary depending on the efficiency of the compiler
14409 the compiler options used during generation.
14412 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
14413 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
14415 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
14416 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
14419 2) iASL Compiler/Disassembler:
14421 - Fixed a Linux generation error.
14424 ----------------------------------------
14425 16 August 2004. Summary of changes for version 20040816:
14427 1) ACPI CA Core Subsystem:
14429 Designed and implemented support within the AML interpreter for the so-
14430 called "implicit return". This support returns the result of the last
14432 operation within a control method, in the absence of an explicit Return()
14433 operator. A few machines depend on this behavior, even though it is not
14434 explicitly supported by the ASL language. It is optional support that
14436 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
14438 Removed support for the PCI_Config address space from the internal low
14440 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
14441 support was not used internally, and would not work correctly anyway
14443 the PCI bus number and segment number were not supported. There are
14444 separate interfaces for PCI configuration space access because of the
14448 Code and Data Size: Current and previous core subsystem library sizes are
14449 shown below. These are the code and data sizes for the acpica.lib
14451 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14452 any ACPI driver or OSPM code. The debug version of the code includes the
14453 debug output trace mechanism and has a much larger code and data size.
14455 that these values will vary depending on the efficiency of the compiler
14457 the compiler options used during generation.
14460 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
14461 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
14463 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
14464 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
14467 2) iASL Compiler/Disassembler:
14469 Fixed a problem where constants in ASL expressions at the root level (not
14470 within a control method) could be inadvertently truncated during code
14471 generation. This problem was introduced in the 20040715 release.
14474 ----------------------------------------
14475 15 July 2004. Summary of changes for version 20040715:
14477 1) ACPI CA Core Subsystem:
14479 Restructured the internal HW GPE interfaces to pass/track the current
14481 of interrupts (enabled/disabled) in order to avoid possible deadlock and
14482 increase flexibility of the interfaces.
14484 Implemented a "lexicographical compare" for String and Buffer objects
14486 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual -
14488 as per further clarification to the ACPI specification. Behavior is
14490 to C library "strcmp".
14492 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
14493 external function. In the 32-bit non-debug case, the stack use has been
14494 reduced from 168 bytes to 32 bytes.
14496 Deployed a new run-time configuration flag,
14497 AcpiGbl_EnableInterpreterSlack,
14498 whose purpose is to allow the AML interpreter to forgive certain bad AML
14499 constructs. Default setting is FALSE.
14501 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field
14503 support code. If enabled, it allows field access to go beyond the end of
14505 region definition if the field is within the region length rounded up to
14507 next access width boundary (a common coding error.)
14509 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
14510 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also,
14512 symbols are lowercase by the latest version of the AcpiSrc tool.
14514 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
14515 rename "Register" to simply "Reg" to prevent certain compilers from
14518 Code and Data Size: Current and previous core subsystem library sizes are
14519 shown below. These are the code and data sizes for the acpica.lib
14521 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14522 any ACPI driver or OSPM code. The debug version of the code includes the
14523 debug output trace mechanism and has a much larger code and data size.
14525 that these values will vary depending on the efficiency of the compiler
14527 the compiler options used during generation.
14530 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
14531 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
14533 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
14534 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
14537 2) iASL Compiler/Disassembler:
14539 Implemented full support for Package objects within the Case() operator.
14540 Note: The Break() operator is currently not supported within Case blocks
14541 (TermLists) as there is some question about backward compatibility with
14546 Fixed a problem where complex terms were not supported properly within
14550 Eliminated extraneous warning for compiler-emitted reserved names of the
14551 form "_T_x". (Used in Switch/Case operators.)
14553 Eliminated optimization messages for "_T_x" objects and small constants
14554 within the DefinitionBlock operator.
14557 ----------------------------------------
14558 15 June 2004. Summary of changes for version 20040615:
14560 1) ACPI CA Core Subsystem:
14562 Implemented support for Buffer and String objects (as per ACPI 2.0) for
14564 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
14567 All directory names in the entire source package are lower case, as they
14568 were in earlier releases.
14570 Implemented "Disassemble" command in the AML debugger that will
14572 a single control method.
14574 Code and Data Size: Current and previous core subsystem library sizes are
14575 shown below. These are the code and data sizes for the acpica.lib
14577 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14578 any ACPI driver or OSPM code. The debug version of the code includes the
14579 debug output trace mechanism and has a much larger code and data size.
14581 that these values will vary depending on the efficiency of the compiler
14583 the compiler options used during generation.
14586 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
14587 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
14590 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
14591 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
14594 2) iASL Compiler/Disassembler:
14596 Implemented support for Buffer and String objects (as per ACPI 2.0) for
14598 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
14601 All directory names in the entire source package are lower case, as they
14602 were in earlier releases.
14604 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
14607 Fixed an issue with the Windows version of the compiler where later
14609 of Windows place the FADT in the registry under the name "FADT" and not
14610 "FACP" as earlier versions did. This applies when using the -g or -
14611 d<nofilename> options. The compiler now looks for both strings as
14614 Fixed a problem with compiler namepath optimization where a namepath
14616 the Scope() operator could not be optimized if the namepath was a subpath
14618 the current scope path.
14620 ----------------------------------------
14621 27 May 2004. Summary of changes for version 20040527:
14623 1) ACPI CA Core Subsystem:
14625 Completed a new design and implementation for EBDA (Extended BIOS Data
14627 support in the RSDP scan code. The original code improperly scanned for
14629 EBDA by simply scanning from memory location 0 to 0x400. The correct
14631 is to first obtain the EBDA pointer from within the BIOS data area, then
14632 scan 1K of memory starting at the EBDA pointer. There appear to be few
14634 any machines that place the RSDP in the EBDA, however.
14636 Integrated a fix for a possible fault during evaluation of BufferField
14637 arguments. Obsolete code that was causing the problem was removed.
14639 Found and fixed a problem in the Field Support Code where data could be
14640 corrupted on a bit field read that starts on an aligned boundary but does
14641 not end on an aligned boundary. Merged the read/write "datum length"
14642 calculation code into a common procedure.
14644 Rolled in a couple of changes to the FreeBSD-specific header.
14647 Code and Data Size: Current and previous core subsystem library sizes are
14648 shown below. These are the code and data sizes for the acpica.lib
14650 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14651 any ACPI driver or OSPM code. The debug version of the code includes the
14652 debug output trace mechanism and has a much larger code and data size.
14654 that these values will vary depending on the efficiency of the compiler
14656 the compiler options used during generation.
14659 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14660 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
14662 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
14663 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
14666 2) iASL Compiler/Disassembler:
14668 Fixed a generation warning produced by some overly-verbose compilers for
14672 ----------------------------------------
14673 14 May 2004. Summary of changes for version 20040514:
14675 1) ACPI CA Core Subsystem:
14677 Fixed a problem where hardware GPE enable bits sometimes not set properly
14678 during and after GPE method execution. Result of 04/27 changes.
14680 Removed extra "clear all GPEs" when sleeping/waking.
14682 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
14683 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above
14685 the new AcpiEv* calls as appropriate.
14687 ACPI_OS_NAME was removed from the OS-specific headers. The default name
14689 now "Microsoft Windows NT" for maximum compatibility. However this can
14691 changed by modifying the acconfig.h file.
14693 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
14694 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
14696 Run _INI methods on ThermalZone objects. This is against the ACPI
14697 specification, but there is apparently ASL code in the field that has
14699 _INI methods, and apparently "other" AML interpreters execute them.
14701 Performed a full 16/32/64 bit lint that resulted in some small changes.
14703 Added a sleep simulation command to the AML debugger to test sleep code.
14705 Code and Data Size: Current and previous core subsystem library sizes are
14706 shown below. These are the code and data sizes for the acpica.lib
14708 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14709 any ACPI driver or OSPM code. The debug version of the code includes the
14710 debug output trace mechanism and has a much larger code and data size.
14712 that these values will vary depending on the efficiency of the compiler
14714 the compiler options used during generation.
14717 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14718 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
14720 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14721 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
14723 ----------------------------------------
14724 27 April 2004. Summary of changes for version 20040427:
14726 1) ACPI CA Core Subsystem:
14728 Completed a major overhaul of the GPE handling within ACPI CA. There are
14729 now three types of GPEs: wake-only, runtime-only, and combination
14731 The only GPEs allowed to be combination wake/run are for button-style
14732 devices such as a control-method power button, control-method sleep
14734 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are
14736 referenced by any _PRW methods are marked for "runtime" and hardware
14737 enabled. Any GPE that is referenced by a _PRW method is marked for
14739 (and disabled at runtime). However, at sleep time, only those GPEs that
14740 have been specifically enabled for wake via the AcpiEnableGpe interface
14742 actually be hardware enabled.
14744 A new external interface has been added, AcpiSetGpeType(), that is meant
14746 be used by device drivers to force a GPE to a particular type. It will
14748 especially useful for the drivers for the button devices mentioned above.
14750 Completed restructuring of the ACPI CA initialization sequence so that
14751 default operation region handlers are installed before GPEs are
14753 and the _PRW methods are executed. This will prevent errors when the
14755 methods attempt to access system memory or I/O space.
14757 GPE enable/disable no longer reads the GPE enable register. We now keep
14759 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
14760 thus no longer depend on the hardware to maintain these bits.
14762 Always clear the wake status and fixed/GPE status bits before sleep, even
14765 Improved the AML debugger output for displaying the GPE blocks and their
14768 Added new strings for the _OSI method, of the form "Windows 2001 SPx"
14772 Fixed a problem where the physical address was incorrectly calculated
14774 the Load() operator was used to directly load from an Operation Region
14776 loading from a Field object.) Also added check for minimum table length
14780 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
14783 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
14784 consistency with the other fields returned.
14786 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
14787 structure for each GPE in the system, so the size of this structure is
14790 CPU stack requirement reduction: Cleaned up the method execution and
14792 evaluation paths so that now a parameter structure is passed, instead of
14793 copying the various method parameters over and over again.
14795 In evregion.c: Correctly exit and reenter the interpreter region if and
14796 only if dispatching an operation region request to a user-installed
14798 Do not exit/reenter when dispatching to a default handler (e.g., default
14799 system memory or I/O handlers)
14802 Notes for updating drivers for the new GPE support. The following
14804 must be made to ACPI-related device drivers that are attached to one or
14806 GPEs: (This information will be added to the ACPI CA Programmer
14809 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you
14811 explicitly call AcpiEnableGpe.
14812 2) There is a new interface called AcpiSetGpeType. This should be called
14813 before enabling the GPE. Also, this interface will automatically disable
14814 the GPE if it is currently enabled.
14815 3) AcpiEnableGpe no longer supports a GPE type flag.
14817 Specific drivers that must be changed:
14819 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
14820 AeGpeHandler, NULL);
14821 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
14822 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
14824 2) Button Drivers (Power, Lid, Sleep):
14825 Run _PRW method under parent device
14826 If _PRW exists: /* This is a control-method button */
14827 Extract GPE number and possibly GpeDevice
14828 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
14829 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
14831 For all other devices that have _PRWs, we automatically set the GPE type
14833 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled.
14835 must be done on a selective basis, usually requiring some kind of user
14837 to allow the user to pick the wake devices.
14840 Code and Data Size: Current and previous core subsystem library sizes are
14841 shown below. These are the code and data sizes for the acpica.lib
14843 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14844 any ACPI driver or OSPM code. The debug version of the code includes the
14845 debug output trace mechanism and has a much larger code and data size.
14847 that these values will vary depending on the efficiency of the compiler
14849 the compiler options used during generation.
14852 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
14853 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
14856 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
14857 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
14861 ----------------------------------------
14862 02 April 2004. Summary of changes for version 20040402:
14864 1) ACPI CA Core Subsystem:
14866 Fixed an interpreter problem where an indirect store through an ArgX
14867 parameter was incorrectly applying the "implicit conversion rules" during
14868 the store. From the ACPI specification: "If the target is a method local
14870 argument (LocalX or ArgX), no conversion is performed and the result is
14871 stored directly to the target". The new behavior is to disable implicit
14872 conversion during ALL stores to an ArgX.
14874 Changed the behavior of the _PRW method scan to ignore any and all errors
14875 returned by a given _PRW. This prevents the scan from aborting from the
14876 failure of any single _PRW.
14878 Moved the runtime configuration parameters from the global init procedure
14880 static variables in acglobal.h. This will allow the host to override the
14881 default values easily.
14883 Code and Data Size: Current and previous core subsystem library sizes are
14884 shown below. These are the code and data sizes for the acpica.lib
14886 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14887 any ACPI driver or OSPM code. The debug version of the code includes the
14888 debug output trace mechanism and has a much larger code and data size.
14890 that these values will vary depending on the efficiency of the compiler
14892 the compiler options used during generation.
14895 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
14896 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
14898 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
14899 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
14902 2) iASL Compiler/Disassembler:
14904 iASL now fully disassembles SSDTs. However, External() statements are
14906 generated automatically for unresolved symbols at this time. This is a
14907 planned feature for future implementation.
14909 Fixed a scoping problem in the disassembler that occurs when the type of
14911 target of a Scope() operator is overridden. This problem caused an
14912 incorrectly nested internal namespace to be constructed.
14914 Any warnings or errors that are emitted during disassembly are now
14916 out automatically so that the resulting file can be recompiled without
14920 ----------------------------------------
14921 26 March 2004. Summary of changes for version 20040326:
14923 1) ACPI CA Core Subsystem:
14925 Implemented support for "wake" GPEs via interaction between GPEs and the
14926 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
14927 identified as a WAKE GPE and by default will no longer be enabled at
14928 runtime. Previously, we were blindly enabling all GPEs with a
14930 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.
14932 believe this has been the cause of thousands of "spurious" GPEs on some
14935 This new GPE behavior is can be reverted to the original behavior (enable
14936 ALL GPEs at runtime) via a runtime flag.
14938 Fixed a problem where aliased control methods could not access objects
14939 properly. The proper scope within the namespace was not initialized
14940 (transferred to the target of the aliased method) before executing the
14943 Fixed a potential race condition on internal object deletion on the
14945 object in AcpiEvaluateObject.
14947 Integrated a fix for resource descriptors where both _MEM and _MTP were
14948 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
14949 wide, 0x0F instead of 0x03.)
14951 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName,
14954 fault in some cases.
14956 Updated Notify() values for debug statements in evmisc.c
14958 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
14960 Code and Data Size: Current and previous core subsystem library sizes are
14961 shown below. These are the code and data sizes for the acpica.lib
14963 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14964 any ACPI driver or OSPM code. The debug version of the code includes the
14965 debug output trace mechanism and has a much larger code and data size.
14967 that these values will vary depending on the efficiency of the compiler
14969 the compiler options used during generation.
14973 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
14974 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
14976 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
14977 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
14979 ----------------------------------------
14980 11 March 2004. Summary of changes for version 20040311:
14982 1) ACPI CA Core Subsystem:
14984 Fixed a problem where errors occurring during the parse phase of control
14985 method execution did not abort cleanly. For example, objects created and
14986 installed in the namespace were not deleted. This caused all subsequent
14987 invocations of the method to return the AE_ALREADY_EXISTS exception.
14989 Implemented a mechanism to force a control method to "Serialized"
14991 if the method attempts to create namespace objects. (The root of the
14992 AE_ALREADY_EXISTS problem.)
14994 Implemented support for the predefined _OSI "internal" control method.
14995 Initial supported strings are "Linux", "Windows 2000", "Windows 2001",
14997 "Windows 2001.1", and can be easily upgraded for new strings as
14999 This feature will allow "other" operating systems to execute the fully
15000 tested, "Windows" code path through the ASL code
15002 Global Lock Support: Now allows multiple acquires and releases with any
15003 internal thread. Removed concept of "owning thread" for this special
15006 Fixed two functions that were inappropriately declaring large objects on
15008 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage
15010 method execution considerably.
15012 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
15013 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
15015 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
15016 defined on the machine.
15018 Implemented two runtime options: One to force all control method
15020 to "Serialized" to mimic Windows behavior, another to disable _OSI
15022 if it causes problems on a given machine.
15024 Code and Data Size: Current and previous core subsystem library sizes are
15025 shown below. These are the code and data sizes for the acpica.lib
15027 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
15028 any ACPI driver or OSPM code. The debug version of the code includes the
15029 debug output trace mechanism and has a much larger code and data size.
15031 that these values will vary depending on the efficiency of the compiler
15033 the compiler options used during generation.
15036 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
15037 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
15039 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
15040 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
15042 2) iASL Compiler/Disassembler:
15044 Fixed an array size problem for FreeBSD that would cause the compiler to
15047 ----------------------------------------
15048 20 February 2004. Summary of changes for version 20040220:
15051 1) ACPI CA Core Subsystem:
15053 Implemented execution of _SxD methods for Device objects in the
15054 GetObjectInfo interface.
15056 Fixed calls to _SST method to pass the correct arguments.
15058 Added a call to _SST on wake to restore to "working" state.
15060 Check for End-Of-Buffer failure case in the WalkResources interface.
15062 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
15063 structures to the beginning of the file.
15065 After wake, clear GPE status register(s) before enabling GPEs.
15067 After wake, clear/enable power button. (Perhaps we should clear/enable
15069 fixed events upon wake.)
15071 Fixed a couple of possible memory leaks in the Namespace manager.
15073 Integrated latest acnetbsd.h file.
15075 ----------------------------------------
15076 11 February 2004. Summary of changes for version 20040211:
15079 1) ACPI CA Core Subsystem:
15081 Completed investigation and implementation of the call-by-reference
15082 mechanism for control method arguments.
15084 Fixed a problem where a store of an object into an indexed package could
15085 fail if the store occurs within a different method than the method that
15086 created the package.
15088 Fixed a problem where the ToDecimal operator could return incorrect
15091 Fixed a problem where the CopyObject operator could fail on some of the
15093 obscure objects (e.g., Reference objects.)
15095 Improved the output of the Debug object to display buffer, package, and
15098 Fixed a problem where constructs of the form "RefOf (ArgX)" did not
15100 the expected result.
15102 Added permanent ACPI_REPORT_ERROR macros for all instances of the
15103 ACPI_AML_INTERNAL exception.
15105 Integrated latest version of acfreebsd.h
15107 ----------------------------------------
15108 16 January 2004. Summary of changes for version 20040116:
15110 The purpose of this release is primarily to update the copyright years in
15111 each module, thus causing a huge number of diffs. There are a few small
15112 functional changes, however.
15114 1) ACPI CA Core Subsystem:
15116 Improved error messages when there is a problem finding one or more of
15118 required base ACPI tables
15120 Reintroduced the definition of APIC_HEADER in actbl.h
15122 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
15124 Removed extraneous reference to NewObj in dsmthdat.c
15128 Fixed a problem introduced in December that disabled the correct
15130 of Resource Templates
15133 ----------------------------------------
15134 03 December 2003. Summary of changes for version 20031203:
15136 1) ACPI CA Core Subsystem:
15138 Changed the initialization of Operation Regions during subsystem
15139 init to perform two entire walks of the ACPI namespace; The first
15140 to initialize the regions themselves, the second to execute the
15141 _REG methods. This fixed some interdependencies across _REG
15142 methods found on some machines.
15144 Fixed a problem where a Store(Local0, Local1) could simply update
15145 the object reference count, and not create a new copy of the
15146 object if the Local1 is uninitialized.
15148 Implemented support for the _SST reserved method during sleep
15151 Implemented support to clear the SLP_TYP and SLP_EN bits when
15152 waking up, this is apparently required by some machines.
15154 When sleeping, clear the wake status only if SleepState is not S5.
15156 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
15157 pointer arithmetic advanced a string pointer too far.
15159 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
15160 could be returned if the requested table has not been loaded.
15162 Within the support for IRQ resources, restructured the handling of
15163 the active and edge/level bits.
15165 Fixed a few problems in AcpiPsxExecute() where memory could be
15166 leaked under certain error conditions.
15168 Improved error messages for the cases where the ACPI mode could
15171 Code and Data Size: Current and previous core subsystem library
15172 sizes are shown below. These are the code and data sizes for the
15173 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
15174 these values do not include any ACPI driver or OSPM code. The
15175 debug version of the code includes the debug output trace
15176 mechanism and has a much larger code and data size. Note that
15177 these values will vary depending on the efficiency of the compiler
15178 and the compiler options used during generation.
15180 Previous Release (20031029):
15181 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
15182 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
15184 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
15185 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
15187 2) iASL Compiler/Disassembler:
15189 Implemented a fix for the iASL disassembler where a bad index was
15190 generated. This was most noticeable on 64-bit platforms
15193 ----------------------------------------
15194 29 October 2003. Summary of changes for version 20031029:
15196 1) ACPI CA Core Subsystem:
15199 Fixed a problem where a level-triggered GPE with an associated
15200 _Lxx control method was incorrectly cleared twice.
15202 Fixed a problem with the Field support code where an access can
15203 occur beyond the end-of-region if the field is non-aligned but
15204 extends to the very end of the parent region (resulted in an
15205 AE_AML_REGION_LIMIT exception.)
15207 Fixed a problem with ACPI Fixed Events where an RT Clock handler
15208 would not get invoked on an RTC event. The RTC event bitmasks for
15209 the PM1 registers were not being initialized properly.
15211 Implemented support for executing _STA and _INI methods for
15212 Processor objects. Although this is currently not part of the
15213 ACPI specification, there is existing ASL code that depends on the
15214 init-time execution of these methods.
15216 Implemented and deployed a GetDescriptorName function to decode
15217 the various types of internal descriptors. Guards against null
15218 descriptors during debug output also.
15220 Implemented and deployed a GetNodeName function to extract the 4-
15221 character namespace node name. This function simplifies the debug
15222 and error output, as well as guarding against null pointers during
15225 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
15226 simplify the debug and error output of 64-bit integers. This
15227 macro replaces the HIDWORD and LODWORD macros for dumping these
15230 Updated the implementation of the Stall() operator to only call
15231 AcpiOsStall(), and also return an error if the operand is larger
15232 than 255. This preserves the required behavior of not
15233 relinquishing the processor, as would happen if AcpiOsSleep() was
15234 called for "long stalls".
15236 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
15237 initialized are now treated as NOOPs.
15239 Cleaned up a handful of warnings during 64-bit generation.
15241 Fixed a reported error where and incorrect GPE number was passed
15242 to the GPE dispatch handler. This value is only used for error
15243 output, however. Used this opportunity to clean up and streamline
15244 the GPE dispatch code.
15246 Code and Data Size: Current and previous core subsystem library
15247 sizes are shown below. These are the code and data sizes for the
15248 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
15249 these values do not include any ACPI driver or OSPM code. The
15251 debug version of the code includes the debug output trace
15252 mechanism and has a much larger code and data size. Note that
15253 these values will vary depending on the efficiency of the compiler
15254 and the compiler options used during generation.
15256 Previous Release (20031002):
15257 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
15258 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
15260 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
15261 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
15264 2) iASL Compiler/Disassembler:
15266 Updated the iASL compiler to return an error if the operand to the
15267 Stall() operator is larger than 255.
15270 ----------------------------------------
15271 02 October 2003. Summary of changes for version 20031002:
15274 1) ACPI CA Core Subsystem:
15276 Fixed a problem with Index Fields where the index was not
15277 incremented for fields that require multiple writes to the
15278 index/data registers (Fields that are wider than the data
15281 Fixed a problem with all Field objects where a write could go
15282 beyond the end-of-field if the field was larger than the access
15283 granularity and therefore required multiple writes to complete the
15284 request. An extra write beyond the end of the field could happen
15287 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
15288 would incorrectly be returned if the width of the Data Register
15289 was larger than the specified field access width.
15291 Completed fixes for LoadTable() and Unload() and verified their
15292 operation. Implemented full support for the "DdbHandle" object
15293 throughout the ACPI CA subsystem.
15295 Implemented full support for the MADT and ECDT tables in the ACPI
15296 CA header files. Even though these tables are not directly
15297 consumed by ACPI CA, the header definitions are useful for ACPI
15300 Integrated resource descriptor fixes posted to the Linux ACPI
15301 list. This included checks for minimum descriptor length, and
15302 support for trailing NULL strings within descriptors that have
15303 optional string elements.
15305 Code and Data Size: Current and previous core subsystem library
15306 sizes are shown below. These are the code and data sizes for the
15307 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
15308 these values do not include any ACPI driver or OSPM code. The
15309 debug version of the code includes the debug output trace
15310 mechanism and has a much larger code and data size. Note that
15311 these values will vary depending on the efficiency of the compiler
15312 and the compiler options used during generation.
15314 Previous Release (20030918):
15315 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
15316 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
15318 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
15319 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
15324 Implemented detection of non-ASCII characters within the input
15325 source ASL file. This catches attempts to compile binary (AML)
15326 files early in the compile, with an informative error message.
15328 Fixed a problem where the disassembler would fault if the output
15329 filename could not be generated or if the output file could not be
15332 ----------------------------------------
15333 18 September 2003. Summary of changes for version 20030918:
15336 1) ACPI CA Core Subsystem:
15338 Found and fixed a longstanding problem with the late execution of
15339 the various deferred AML opcodes (such as Operation Regions,
15340 Buffer Fields, Buffers, and Packages). If the name string
15341 specified for the name of the new object placed the object in a
15342 scope other than the current scope, the initialization/execution
15343 of the opcode failed. The solution to this problem was to
15344 implement a mechanism where the late execution of such opcodes
15345 does not attempt to lookup/create the name a second time in an
15346 incorrect scope. This fixes the "region size computed
15347 incorrectly" problem.
15349 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
15350 Global Lock AE_BAD_PARAMETER error.
15352 Fixed several 64-bit issues with prototypes, casting and data
15355 Removed duplicate prototype from acdisasm.h
15357 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
15359 Code and Data Size: Current and previous core subsystem library
15360 sizes are shown below. These are the code and data sizes for the
15361 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
15362 these values do not include any ACPI driver or OSPM code. The
15363 debug version of the code includes the debug output trace
15364 mechanism and has a much larger code and data size. Note that
15365 these values will vary depending on the efficiency of the compiler
15366 and the compiler options used during generation.
15370 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
15371 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
15373 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
15374 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
15379 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
15380 correct sleep time in seconds.
15382 ----------------------------------------
15383 14 July 2003. Summary of changes for version 20030619:
15385 1) ACPI CA Core Subsystem:
15387 Parse SSDTs in order discovered, as opposed to reverse order
15390 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
15397 Dynamically allocate SDT list (suggested by Andi Kleen)
15399 proc function return value cleanups (Andi Kleen)
15401 Correctly handle NMI watchdog during long stalls (Andrew Morton)
15403 Make it so acpismp=force works (reported by Andrew Morton)
15406 ----------------------------------------
15407 19 June 2003. Summary of changes for version 20030619:
15409 1) ACPI CA Core Subsystem:
15411 Fix To/FromBCD, eliminating the need for an arch-specific #define.
15413 Do not acquire a semaphore in the S5 shutdown path.
15415 Fix ex_digits_needed for 0. (Takayoshi Kochi)
15417 Fix sleep/stall code reversal. (Andi Kleen)
15419 Revert a change having to do with control method calling
15424 acpiphp update (Takayoshi Kochi)
15426 Export acpi_disabled for sonypi (Stelian Pop)
15428 Mention acpismp=force in config help
15430 Re-add acpitable.c and acpismp=force. This improves backwards
15432 compatibility and also cleans up the code to a significant degree.
15434 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
15436 ----------------------------------------
15437 22 May 2003. Summary of changes for version 20030522:
15439 1) ACPI CA Core Subsystem:
15441 Found and fixed a reported problem where an AE_NOT_FOUND error
15442 occurred occasionally during _BST evaluation. This turned out to
15443 be an Owner ID allocation issue where a called method did not get
15444 a new ID assigned to it. Eventually, (after 64k calls), the Owner
15445 ID UINT16 would wraparound so that the ID would be the same as the
15446 caller's and the called method would delete the caller's
15449 Implemented extended error reporting for control methods that are
15450 aborted due to a run-time exception. Output includes the exact
15451 AML instruction that caused the method abort, a dump of the method
15452 locals and arguments at the time of the abort, and a trace of all
15453 nested control method calls.
15455 Modified the interpreter to allow the creation of buffers of zero
15456 length from the AML code. Implemented new code to ensure that no
15457 attempt is made to actually allocate a memory buffer (of length
15458 zero) - instead, a simple buffer object with a NULL buffer pointer
15459 and length zero is created. A warning is no longer issued when
15460 the AML attempts to create a zero-length buffer.
15462 Implemented a workaround for the "leading asterisk issue" in
15463 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
15464 asterisk is automatically removed if present in any HID, UID, or
15465 CID strings. The iASL compiler will still flag this asterisk as
15468 Implemented full support for _CID methods that return a package of
15469 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
15470 now additionally returns a device _CID list if present. This
15471 required a change to the external interface in order to pass an
15472 ACPI_BUFFER object as a parameter since the _CID list is of
15475 Fixed a problem with the new AE_SAME_HANDLER exception where
15476 handler initialization code did not know about this exception.
15478 Code and Data Size: Current and previous core subsystem library
15479 sizes are shown below. These are the code and data sizes for the
15480 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
15481 these values do not include any ACPI driver or OSPM code. The
15482 debug version of the code includes the debug output trace
15483 mechanism and has a much larger code and data size. Note that
15484 these values will vary depending on the efficiency of the compiler
15485 and the compiler options used during generation.
15487 Previous Release (20030509):
15488 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
15489 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
15491 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
15492 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
15497 Fixed a bug in which we would reinitialize the ACPI interrupt
15498 after it was already working, thus disabling all ACPI and the IRQs
15499 for any other device sharing the interrupt. (Thanks to Stian
15502 Toshiba driver update (John Belmonte)
15504 Return only 0 or 1 for our interrupt handler status (Andrew
15510 Fixed a reported problem where multiple (nested) ElseIf()
15511 statements were not handled correctly by the compiler, resulting
15512 in incorrect warnings and incorrect AML code. This was a problem
15513 in both the ASL parser and the code generator.
15518 Added changes to existing interfaces, new exception codes, and new
15519 text concerning reference count object management versus garbage
15522 ----------------------------------------
15523 09 May 2003. Summary of changes for version 20030509.
15526 1) ACPI CA Core Subsystem:
15528 Changed the subsystem initialization sequence to hold off
15529 installation of address space handlers until the hardware has been
15530 initialized and the system has entered ACPI mode. This is because
15531 the installation of space handlers can cause _REG methods to be
15532 run. Previously, the _REG methods could potentially be run before
15533 ACPI mode was enabled.
15535 Fixed some memory leak issues related to address space handler and
15536 notify handler installation. There were some problems with the
15537 reference count mechanism caused by the fact that the handler
15538 objects are shared across several namespace objects.
15540 Fixed a reported problem where reference counts within the
15541 namespace were not properly updated when named objects created by
15542 method execution were deleted.
15544 Fixed a reported problem where multiple SSDTs caused a deletion
15545 issue during subsystem termination. Restructured the table data
15546 structures to simplify the linked lists and the related code.
15548 Fixed a problem where the table ID associated with secondary
15549 tables (SSDTs) was not being propagated into the namespace objects
15550 created by those tables. This would only present a problem for
15551 tables that are unloaded at run-time, however.
15553 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
15554 type as the length parameter (instead of UINT32).
15556 Solved a long-standing problem where an ALREADY_EXISTS error
15557 appears on various systems. This problem could happen when there
15558 are multiple PCI_Config operation regions under a single PCI root
15559 bus. This doesn't happen very frequently, but there are some
15560 systems that do this in the ASL.
15562 Fixed a reported problem where the internal DeleteNode function
15563 was incorrectly handling the case where a namespace node was the
15564 first in the parent's child list, and had additional peers (not
15565 the only child, but first in the list of children.)
15567 Code and Data Size: Current core subsystem library sizes are shown
15568 below. These are the code and data sizes for the acpica.lib
15569 produced by the Microsoft Visual C++ 6.0 compiler, and these
15570 values do not include any ACPI driver or OSPM code. The debug
15571 version of the code includes the debug output trace mechanism and
15572 has a much larger code and data size. Note that these values will
15573 vary depending on the efficiency of the compiler and the compiler
15574 options used during generation.
15577 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
15578 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
15580 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
15581 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
15586 Allow ":" in OS override string (Ducrot Bruno)
15588 Kobject fix (Greg KH)
15591 3 iASL Compiler/Disassembler:
15593 Fixed a problem in the generation of the C source code files (AML
15594 is emitted in C source statements for BIOS inclusion) where the
15595 Ascii dump that appears within a C comment at the end of each line
15596 could cause a compile time error if the AML sequence happens to
15597 have an open comment or close comment sequence embedded.
15600 ----------------------------------------
15601 24 April 2003. Summary of changes for version 20030424.
15604 1) ACPI CA Core Subsystem:
15606 Support for big-endian systems has been implemented. Most of the
15607 support has been invisibly added behind big-endian versions of the
15608 ACPI_MOVE_* macros.
15610 Fixed a problem in AcpiHwDisableGpeBlock() and
15611 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
15612 low level hardware write routine. The offset parameter was
15613 actually eliminated from the low level read/write routines because
15614 they had become obsolete.
15616 Fixed a problem where a handler object was deleted twice during
15617 the removal of a fixed event handler.
15622 A fix for SMP systems with link devices was contributed by
15626 (2.5) Return whether we handled the interrupt in our IRQ handler.
15627 (Linux ISRs no longer return void, so we can propagate the handler
15628 return value from the ACPI CA core back to the OS.)
15634 The ACPI CA Programmer Reference has been updated to reflect new
15635 interfaces and changes to existing interfaces.
15637 ----------------------------------------
15638 28 March 2003. Summary of changes for version 20030328.
15640 1) ACPI CA Core Subsystem:
15642 The GPE Block Device support has been completed. New interfaces
15643 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
15644 interfaces (enable, disable, clear, getstatus) have been split
15645 into separate interfaces for Fixed Events and General Purpose
15646 Events (GPEs) in order to support GPE Block Devices properly.
15648 Fixed a problem where the error message "Failed to acquire
15649 semaphore" would appear during operations on the embedded
15652 Code and Data Size: Current core subsystem library sizes are shown
15653 below. These are the code and data sizes for the acpica.lib
15654 produced by the Microsoft Visual C++ 6.0 compiler, and these
15655 values do not include any ACPI driver or OSPM code. The debug
15656 version of the code includes the debug output trace mechanism and
15657 has a much larger code and data size. Note that these values will
15658 vary depending on the efficiency of the compiler and the compiler
15659 options used during generation.
15662 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
15663 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
15665 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
15666 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
15669 ----------------------------------------
15670 28 February 2003. Summary of changes for version 20030228.
15673 1) ACPI CA Core Subsystem:
15675 The GPE handling and dispatch code has been completely overhauled
15676 in preparation for support of GPE Block Devices (ID ACPI0006).
15677 This affects internal data structures and code only; there should
15678 be no differences visible externally. One new file has been
15681 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
15682 fields that are used to determine the GPE block lengths. The
15683 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
15684 structures are ignored. This is per the ACPI specification but it
15685 isn't very clear. The full 256 Block 0/1 GPEs are now supported
15686 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
15688 In the SCI interrupt handler, removed the read of the PM1_CONTROL
15689 register to look at the SCI_EN bit. On some machines, this read
15690 causes an SMI event and greatly slows down SCI events. (This may
15691 in fact be the cause of slow battery status response on some
15694 Fixed a problem where a store of a NULL string to a package object
15695 could cause the premature deletion of the object. This was seen
15696 during execution of the battery _BIF method on some systems,
15697 resulting in no battery data being returned.
15699 Added AcpiWalkResources interface to simplify parsing of resource
15702 Code and Data Size: Current core subsystem library sizes are shown
15703 below. These are the code and data sizes for the acpica.lib
15704 produced by the Microsoft Visual C++ 6.0 compiler, and these
15705 values do not include any ACPI driver or OSPM code. The debug
15706 version of the code includes the debug output trace mechanism and
15707 has a much larger code and data size. Note that these values will
15708 vary depending on the efficiency of the compiler and the compiler
15709 options used during generation.
15712 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15713 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15715 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
15716 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
15721 S3 fixes (Ole Rohne)
15723 Update ACPI PHP driver with to use new acpi_walk_resource API
15726 Add S4BIOS support (Pavel Machek)
15728 Map in entire table before performing checksum (John Stultz)
15730 Expand the mem= cmdline to allow the specification of reserved and
15731 ACPI DATA blocks (Pavel Machek)
15733 Never use ACPI on VISWS
15735 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
15737 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
15738 causing us to think that some systems support C2 when they really
15741 Do not count processor objects for non-present CPUs (Thanks to
15747 Fixed a problem where ASL include files could not be found and
15750 Added support for the _PDC reserved name.
15753 ----------------------------------------
15754 22 January 2003. Summary of changes for version 20030122.
15757 1) ACPI CA Core Subsystem:
15759 Added a check for constructs of the form: Store (Local0, Local0)
15760 where Local0 is not initialized. Apparently, some BIOS
15761 programmers believe that this is a NOOP. Since this store doesn't
15762 do anything anyway, the new prototype behavior will ignore this
15763 error. This is a case where we can relax the strict checking in
15764 the interpreter in the name of compatibility.
15769 The AcpiSrc Source Conversion Utility has been released with the
15770 Linux package for the first time. This is the utility that is
15771 used to convert the ACPI CA base source code to the Linux version.
15773 (Both) Handle P_BLK lengths shorter than 6 more gracefully
15775 (Both) Move more headers to include/acpi, and delete an unused
15778 (Both) Move drivers/acpi/include directory to include/acpi
15780 (Both) Boot functions don't use cmdline, so don't pass it around
15782 (Both) Remove include of unused header (Adrian Bunk)
15784 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
15786 former now also includes the latter, acpiphp.h only needs the one,
15789 (2.5) Make it possible to select method of bios restoring after S3
15790 resume. [=> no more ugly ifdefs] (Pavel Machek)
15792 (2.5) Make proc write interfaces work (Pavel Machek)
15794 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
15796 (2.5) Break out ACPI Perf code into its own module, under cpufreq
15797 (Dominik Brodowski)
15799 (2.4) S4BIOS support (Ducrot Bruno)
15801 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
15807 Added support to disassemble SSDT and PSDTs.
15809 Implemented support to obtain SSDTs from the Windows registry if
15813 ----------------------------------------
15814 09 January 2003. Summary of changes for version 20030109.
15816 1) ACPI CA Core Subsystem:
15818 Changed the behavior of the internal Buffer-to-String conversion
15819 function. The current ACPI specification states that the contents
15820 of the buffer are "converted to a string of two-character
15821 hexadecimal numbers, each separated by a space". Unfortunately,
15822 this definition is not backwards compatible with existing ACPI 1.0
15823 implementations (although the behavior was not defined in the ACPI
15824 1.0 specification). The new behavior simply copies data from the
15825 buffer to the string until a null character is found or the end of
15826 the buffer is reached. The new String object is always null
15827 terminated. This problem was seen during the generation of _BIF
15828 battery data where incorrect strings were returned for battery
15829 type, etc. This will also require an errata to the ACPI
15832 Renamed all instances of NATIVE_UINT and NATIVE_INT to
15833 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
15835 Copyright in all module headers (both Linux and non-Linux) has be
15838 Code and Data Size: Current core subsystem library sizes are shown
15839 below. These are the code and data sizes for the acpica.lib
15840 produced by the Microsoft Visual C++ 6.0 compiler, and these
15841 values do not include any ACPI driver or OSPM code. The debug
15842 version of the code includes the debug output trace mechanism and
15843 has a much larger code and data size. Note that these values will
15844 vary depending on the efficiency of the compiler and the compiler
15845 options used during generation.
15848 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15849 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15851 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15852 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15857 Fixed an oops on module insertion/removal (Matthew Tippett)
15859 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
15861 (2.5) Replace pr_debug (Randy Dunlap)
15863 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
15865 (Both) Eliminate spawning of thread from timer callback, in favor
15868 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
15870 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
15872 (Both) Add missing statics to button.c (Pavel Machek)
15874 Several changes have been made to the source code translation
15875 utility that generates the Linux Code in order to make the code
15878 All typedefs on structs and unions have been removed in keeping
15879 with the Linux coding style.
15881 Removed the non-Linux SourceSafe module revision number from each
15884 Completed major overhaul of symbols to be lowercase for linux.
15885 Doubled the number of symbols that are lowercase.
15887 Fixed a problem where identifiers within procedure headers and
15888 within quotes were not fully lower cased (they were left with a
15891 Some C macros whose only purpose is to allow the generation of 16-
15892 bit code are now completely removed in the Linux code, increasing
15893 readability and maintainability.
15895 ----------------------------------------
15897 12 December 2002. Summary of changes for version 20021212.
15900 1) ACPI CA Core Subsystem:
15902 Fixed a problem where the creation of a zero-length AML Buffer
15903 would cause a fault.
15905 Fixed a problem where a Buffer object that pointed to a static AML
15906 buffer (in an ACPI table) could inadvertently be deleted, causing
15909 Fixed a problem where a user buffer (passed in to the external
15910 ACPI CA interfaces) could be overwritten if the buffer was too
15911 small to complete the operation, causing memory corruption.
15913 Fixed a problem in the Buffer-to-String conversion code where a
15914 string of length one was always returned, regardless of the size
15915 of the input Buffer object.
15917 Removed the NATIVE_CHAR data type across the entire source due to
15918 lack of need and lack of consistent use.
15920 Code and Data Size: Current core subsystem library sizes are shown
15921 below. These are the code and data sizes for the acpica.lib
15922 produced by the Microsoft Visual C++ 6.0 compiler, and these
15923 values do not include any ACPI driver or OSPM code. The debug
15924 version of the code includes the debug output trace mechanism and
15925 has a much larger code and data size. Note that these values will
15926 vary depending on the efficiency of the compiler and the compiler
15927 options used during generation.
15930 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
15931 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
15933 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15934 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15937 ----------------------------------------
15938 05 December 2002. Summary of changes for version 20021205.
15940 1) ACPI CA Core Subsystem:
15942 Fixed a problem where a store to a String or Buffer object could
15943 cause corruption of the DSDT if the object type being stored was
15944 the same as the target object type and the length of the object
15945 being stored was equal to or smaller than the original (existing)
15946 target object. This was seen to cause corruption of battery _BIF
15947 buffers if the _BIF method modified the buffer on the fly.
15949 Fixed a problem where an internal error was generated if a control
15950 method invocation was used in an OperationRegion, Buffer, or
15951 Package declaration. This was caused by the deferred parsing of
15952 the control method and thus the deferred creation of the internal
15953 method object. The solution to this problem was to create the
15954 internal method object at the moment the method is encountered in
15955 the first pass - so that subsequent references to the method will
15956 able to obtain the required parameter count and thus properly
15957 parse the method invocation. This problem presented itself as an
15958 AE_AML_INTERNAL during the pass 1 parse phase during table load.
15960 Fixed a problem where the internal String object copy routine did
15961 not always allocate sufficient memory for the target String object
15962 and caused memory corruption. This problem was seen to cause
15963 "Allocation already present in list!" errors as memory allocation
15966 Implemented a new function for the evaluation of namespace objects
15967 that allows the specification of the allowable return object
15968 types. This simplifies a lot of code that checks for a return
15969 object of one or more specific objects returned from the
15970 evaluation (such as _STA, etc.) This may become and external
15971 function if it would be useful to ACPI-related drivers.
15973 Completed another round of prefixing #defines with "ACPI_" for
15976 Completed additional code restructuring to allow more modular
15977 linking for iASL compiler and AcpiExec. Several files were split
15978 creating new files. New files: nsparse.c dsinit.c evgpe.c
15980 Implemented an abort mechanism to terminate an executing control
15981 method via the AML debugger. This feature is useful for debugging
15982 control methods that depend (wait) for specific hardware
15985 Code and Data Size: Current core subsystem library sizes are shown
15986 below. These are the code and data sizes for the acpica.lib
15987 produced by the Microsoft Visual C++ 6.0 compiler, and these
15988 values do not include any ACPI driver or OSPM code. The debug
15989 version of the code includes the debug output trace mechanism and
15990 has a much larger code and data size. Note that these values will
15991 vary depending on the efficiency of the compiler and the compiler
15992 options used during generation.
15995 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15996 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
15998 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
15999 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
16002 2) iASL Compiler/Disassembler
16004 Fixed a compiler code generation problem for "Interrupt" Resource
16005 Descriptors. If specified in the ASL, the optional "Resource
16006 Source Index" and "Resource Source" fields were not inserted into
16007 the correct location within the AML resource descriptor, creating
16008 an invalid descriptor.
16010 Fixed a disassembler problem for "Interrupt" resource descriptors.
16011 The optional "Resource Source Index" and "Resource Source" fields
16015 ----------------------------------------
16016 22 November 2002. Summary of changes for version 20021122.
16019 1) ACPI CA Core Subsystem:
16021 Fixed a reported problem where an object stored to a Method Local
16022 or Arg was not copied to a new object during the store - the
16023 object pointer was simply copied to the Local/Arg. This caused
16024 all subsequent operations on the Local/Arg to also affect the
16025 original source of the store operation.
16027 Fixed a problem where a store operation to a Method Local or Arg
16028 was not completed properly if the Local/Arg contained a reference
16029 (from RefOf) to a named field. The general-purpose store-to-
16030 namespace-node code is now used so that this case is handled
16033 Fixed a problem where the internal object copy routine would cause
16034 a protection fault if the object being copied was a Package and
16035 contained either 1) a NULL package element or 2) a nested sub-
16038 Fixed a problem with the GPE initialization that resulted from an
16039 ambiguity in the ACPI specification. One section of the
16040 specification states that both the address and length of the GPE
16041 block must be zero if the block is not supported. Another section
16042 implies that only the address need be zero if the block is not
16043 supported. The code has been changed so that both the address and
16044 the length must be non-zero to indicate a valid GPE block (i.e.,
16045 if either the address or the length is zero, the GPE block is
16048 Code and Data Size: Current core subsystem library sizes are shown
16049 below. These are the code and data sizes for the acpica.lib
16050 produced by the Microsoft Visual C++ 6.0 compiler, and these
16051 values do not include any ACPI driver or OSPM code. The debug
16052 version of the code includes the debug output trace mechanism and
16053 has a much larger code and data size. Note that these values will
16054 vary depending on the efficiency of the compiler and the compiler
16055 options used during generation.
16058 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
16059 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
16061 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
16062 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
16067 Cleaned up EC driver. Exported an external EC read/write
16068 interface. By going through this, other drivers (most notably
16069 sonypi) will be able to serialize access to the EC.
16072 3) iASL Compiler/Disassembler
16074 Implemented support to optionally generate include files for both
16075 ASM and C (the -i switch). This simplifies BIOS development by
16076 automatically creating include files that contain external
16077 declarations for the symbols that are created within the
16079 (optionally generated) ASM and C AML source files.
16082 ----------------------------------------
16083 15 November 2002. Summary of changes for version 20021115.
16085 1) ACPI CA Core Subsystem:
16087 Fixed a memory leak problem where an error during resolution of
16089 method arguments during a method invocation from another method
16090 failed to cleanup properly by deleting all successfully resolved
16093 Fixed a problem where the target of the Index() operator was not
16094 correctly constructed if the source object was a package. This
16095 problem has not been detected because the use of a target operand
16096 with Index() is very rare.
16098 Fixed a problem with the Index() operator where an attempt was
16099 made to delete the operand objects twice.
16101 Fixed a problem where an attempt was made to delete an operand
16102 twice during execution of the CondRefOf() operator if the target
16105 Implemented the first of perhaps several internal create object
16106 functions that create and initialize a specific object type. This
16107 consolidates duplicated code wherever the object is created, thus
16108 shrinking the size of the subsystem.
16110 Implemented improved debug/error messages for errors that occur
16111 during nested method invocations. All executing method pathnames
16112 are displayed (with the error) as the call stack is unwound - thus
16115 Fixed a problem introduced in the 10/02 release that caused
16116 premature deletion of a buffer object if a buffer was used as an
16117 ASL operand where an integer operand is required (Thus causing an
16118 implicit object conversion from Buffer to Integer.) The change in
16119 the 10/02 release was attempting to fix a memory leak (albeit
16122 Code and Data Size: Current core subsystem library sizes are shown
16123 below. These are the code and data sizes for the acpica.lib
16124 produced by the Microsoft Visual C++ 6.0 compiler, and these
16125 values do not include any ACPI driver or OSPM code. The debug
16126 version of the code includes the debug output trace mechanism and
16127 has a much larger code and data size. Note that these values will
16128 vary depending on the efficiency of the compiler and the compiler
16129 options used during generation.
16132 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
16133 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
16135 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
16136 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
16141 Changed the implementation of the ACPI semaphores to use down()
16142 instead of down_interruptable(). It is important that the
16143 execution of ACPI control methods not be interrupted by signals.
16144 Methods must run to completion, or the system may be left in an
16145 unknown/unstable state.
16147 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
16151 3) iASL Compiler/Disassembler
16154 Changed the default location of output files. All output files
16155 are now placed in the current directory by default instead of in
16156 the directory of the source file. This change may affect some
16157 existing makefiles, but it brings the behavior of the compiler in
16158 line with other similar tools. The location of the output files
16159 can be overridden with the -p command line switch.
16162 ----------------------------------------
16163 11 November 2002. Summary of changes for version 20021111.
16166 0) ACPI Specification 2.0B is released and is now available at:
16167 http://www.acpi.info/index.html
16170 1) ACPI CA Core Subsystem:
16172 Implemented support for the ACPI 2.0 SMBus Operation Regions.
16173 This includes the early detection and handoff of the request to
16174 the SMBus region handler (avoiding all of the complex field
16175 support code), and support for the bidirectional return packet
16176 from an SMBus write operation. This paves the way for the
16177 development of SMBus drivers in each host operating system.
16179 Fixed a problem where the semaphore WAIT_FOREVER constant was
16180 defined as 32 bits, but must be 16 bits according to the ACPI
16181 specification. This had the side effect of causing ASL
16182 Mutex/Event timeouts even though the ASL code requested a wait
16183 forever. Changed all internal references to the ACPI timeout
16184 parameter to 16 bits to prevent future problems. Changed the name
16185 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
16187 Code and Data Size: Current core subsystem library sizes are shown
16188 below. These are the code and data sizes for the acpica.lib
16189 produced by the Microsoft Visual C++ 6.0 compiler, and these
16190 values do not include any ACPI driver or OSPM code. The debug
16191 version of the code includes the debug output trace mechanism and
16192 has a much larger code and data size. Note that these values will
16193 vary depending on the efficiency of the compiler and the compiler
16194 options used during generation.
16197 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
16198 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
16200 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
16201 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
16206 Module loading/unloading fixes (John Cagle)
16209 3) iASL Compiler/Disassembler
16211 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
16213 Implemented support for the disassembly of all SMBus protocol
16214 keywords (SMBQuick, SMBWord, etc.)
16216 ----------------------------------------
16217 01 November 2002. Summary of changes for version 20021101.
16220 1) ACPI CA Core Subsystem:
16222 Fixed a problem where platforms that have a GPE1 block but no GPE0
16223 block were not handled correctly. This resulted in a "GPE
16224 overlap" error message. GPE0 is no longer required.
16226 Removed code added in the previous release that inserted nodes
16227 into the namespace in alphabetical order. This caused some side-
16228 effects on various machines. The root cause of the problem is
16229 still under investigation since in theory, the internal ordering
16230 of the namespace nodes should not matter.
16233 Enhanced error reporting for the case where a named object is not
16234 found during control method execution. The full ACPI namepath
16235 (name reference) of the object that was not found is displayed in
16238 Note: as a result of the overhaul of the namespace object types in
16239 the previous release, the namespace nodes for the predefined
16240 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
16241 instead of ACPI_TYPE_ANY. This simplifies the namespace
16242 management code but may affect code that walks the namespace tree
16243 looking for specific object types.
16245 Code and Data Size: Current core subsystem library sizes are shown
16246 below. These are the code and data sizes for the acpica.lib
16247 produced by the Microsoft Visual C++ 6.0 compiler, and these
16248 values do not include any ACPI driver or OSPM code. The debug
16249 version of the code includes the debug output trace mechanism and
16250 has a much larger code and data size. Note that these values will
16251 vary depending on the efficiency of the compiler and the compiler
16252 options used during generation.
16255 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
16256 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
16258 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
16259 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
16264 Fixed a problem introduced in the previous release where the
16265 Processor and Thermal objects were not recognized and installed in
16266 /proc. This was related to the scope type change described above.
16269 3) iASL Compiler/Disassembler
16271 Implemented the -g option to get all of the required ACPI tables
16272 from the registry and save them to files (Windows version of the
16273 compiler only.) The required tables are the FADT, FACS, and DSDT.
16275 Added ACPI table checksum validation during table disassembly in
16276 order to catch corrupted tables.
16279 ----------------------------------------
16280 22 October 2002. Summary of changes for version 20021022.
16282 1) ACPI CA Core Subsystem:
16284 Implemented a restriction on the Scope operator that the target
16285 must already exist in the namespace at the time the operator is
16286 encountered (during table load or method execution). In other
16287 words, forward references are not allowed and Scope() cannot
16288 create a new object. This changes the previous behavior where the
16289 interpreter would create the name if not found. This new behavior
16290 correctly enables the search-to-root algorithm during namespace
16291 lookup of the target name. Because of this upsearch, this fixes
16292 the known Compaq _SB_.OKEC problem and makes both the AML
16293 interpreter and iASL compiler compatible with other ACPI
16296 Completed a major overhaul of the internal ACPI object types for
16297 the ACPI Namespace and the associated operand objects. Many of
16298 these types had become obsolete with the introduction of the two-
16299 pass namespace load. This cleanup simplifies the code and makes
16300 the entire namespace load mechanism much clearer and easier to
16303 Improved debug output for tracking scope opening/closing to help
16304 diagnose scoping issues. The old scope name as well as the new
16305 scope name are displayed. Also improved error messages for
16306 problems with ASL Mutex objects and error messages for GPE
16309 Cleaned up the namespace dump code, removed obsolete code.
16311 All string output (for all namespace/object dumps) now uses the
16312 common ACPI string output procedure which handles escapes properly
16313 and does not emit non-printable characters.
16315 Fixed some issues with constants in the 64-bit version of the
16316 local C library (utclib.c)
16321 EC Driver: No longer attempts to acquire the Global Lock at
16325 3) iASL Compiler/Disassembler
16327 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
16328 2 opcodes outside of a control method. This means that the
16329 "executable" operators (versus the "namespace" operators) cannot
16330 be used at the table level; they can only be used within a control
16333 Implemented the restriction on the Scope() operator where the
16334 target must already exist in the namespace at the time the
16335 operator is encountered (during ASL compilation). In other words,
16336 forward references are not allowed and Scope() cannot create a new
16337 object. This makes the iASL compiler compatible with other ACPI
16338 implementations and makes the Scope() implementation adhere to the
16339 ACPI specification.
16341 Fixed a problem where namepath optimization for the Alias operator
16342 was optimizing the wrong path (of the two namepaths.) This caused
16343 a "Missing alias link" error message.
16345 Fixed a problem where an "unknown reserved name" warning could be
16346 incorrectly generated for names like "_SB" when the trailing
16347 underscore is not used in the original ASL.
16349 Fixed a problem where the reserved name check did not handle
16350 NamePaths with multiple NameSegs correctly. The first nameseg of
16351 the NamePath was examined instead of the last NameSeg.
16354 ----------------------------------------
16356 02 October 2002. Summary of changes for this release.
16359 1) ACPI CA Core Subsystem version 20021002:
16361 Fixed a problem where a store/copy of a string to an existing
16362 string did not always set the string length properly in the String
16365 Fixed a reported problem with the ToString operator where the
16366 behavior was identical to the ToHexString operator instead of just
16367 simply converting a raw buffer to a string data type.
16369 Fixed a problem where CopyObject and the other "explicit"
16370 conversion operators were not updating the internal namespace node
16371 type as part of the store operation.
16373 Fixed a memory leak during implicit source operand conversion
16374 where the original object was not deleted if it was converted to a
16375 new object of a different type.
16377 Enhanced error messages for all problems associated with namespace
16378 lookups. Common procedure generates and prints the lookup name as
16379 well as the formatted status.
16381 Completed implementation of a new design for the Alias support
16382 within the namespace. The existing design did not handle the case
16383 where a new object was assigned to one of the two names due to the
16384 use of an explicit conversion operator, resulting in the two names
16385 pointing to two different objects. The new design simply points
16386 the Alias name to the original name node - not to the object.
16387 This results in a level of indirection that must be handled in the
16388 name resolution mechanism.
16390 Code and Data Size: Current core subsystem library sizes are shown
16391 below. These are the code and data sizes for the acpica.lib
16392 produced by the Microsoft Visual C++ 6.0 compiler, and these
16393 values do not include any ACPI driver or OSPM code. The debug
16394 version of the code includes the debug output trace mechanism and
16395 has a larger code and data size. Note that these values will vary
16396 depending on the efficiency of the compiler and the compiler
16397 options used during generation.
16400 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
16401 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
16403 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
16404 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
16409 Initialize thermal driver's timer before it is used. (Knut
16412 Allow handling negative celsius values. (Kochi Takayoshi)
16414 Fix thermal management and make trip points. R/W (Pavel Machek)
16416 Fix /proc/acpi/sleep. (P. Christeas)
16418 IA64 fixes. (David Mosberger)
16420 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
16422 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
16426 3) iASL Compiler/Disassembler
16428 Clarified some warning/error messages.
16431 ----------------------------------------
16432 18 September 2002. Summary of changes for this release.
16435 1) ACPI CA Core Subsystem version 20020918:
16437 Fixed a reported problem with reference chaining (via the Index()
16438 and RefOf() operators) in the ObjectType() and SizeOf() operators.
16439 The definition of these operators includes the dereferencing of
16440 all chained references to return information on the base object.
16442 Fixed a problem with stores to indexed package elements - the
16443 existing code would not complete the store if an "implicit
16444 conversion" was not performed. In other words, if the existing
16445 object (package element) was to be replaced completely, the code
16446 didn't handle this case.
16448 Relaxed typechecking on the ASL "Scope" operator to allow the
16449 target name to refer to an object of type Integer, String, or
16450 Buffer, in addition to the scoping object types (Device,
16451 predefined Scopes, Processor, PowerResource, and ThermalZone.)
16452 This allows existing AML code that has workarounds for a bug in
16453 Windows to function properly. A warning is issued, however. This
16454 affects both the AML interpreter and the iASL compiler. Below is
16455 an example of this type of ASL code:
16461 Fixed some reported problems with 64-bit integer support in the
16462 local implementation of C library functions (clib.c)
16467 Use ACPI fix map region instead of IOAPIC region, since it is
16468 undefined in non-SMP.
16470 Ensure that the SCI has the proper polarity and trigger, even on
16471 systems that do not have an interrupt override entry in the MADT.
16473 2.5 big driver reorganization (Pat Mochel)
16475 Use early table mapping code from acpitable.c (Andi Kleen)
16477 New blacklist entries (Andi Kleen)
16479 Blacklist improvements. Split blacklist code out into a separate
16480 file. Move checking the blacklist to very early. Previously, we
16481 would use ACPI tables, and then halfway through init, check the
16482 blacklist -- too late. Now, it's early enough to completely fall-
16486 3) iASL Compiler/Disassembler version 20020918:
16488 Fixed a problem where the typechecking code didn't know that an
16489 alias could point to a method. In other words, aliases were not
16490 being dereferenced during typechecking.
16493 ----------------------------------------
16494 29 August 2002. Summary of changes for this release.
16496 1) ACPI CA Core Subsystem Version 20020829:
16498 If the target of a Scope() operator already exists, it must be an
16499 object type that actually opens a scope -- such as a Device,
16500 Method, Scope, etc. This is a fatal runtime error. Similar error
16501 check has been added to the iASL compiler also.
16503 Tightened up the namespace load to disallow multiple names in the
16504 same scope. This previously was allowed if both objects were of
16505 the same type. (i.e., a lookup was the same as entering a new
16511 Ensure that the ACPI interrupt has the proper trigger and
16514 local_irq_disable is extraneous. (Matthew Wilcox)
16516 Make "acpi=off" actually do what it says, and not use the ACPI
16517 interpreter *or* the tables.
16519 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
16523 3) iASL Compiler/Disassembler Version 20020829:
16525 Implemented namepath optimization for name declarations. For
16526 example, a declaration like "Method (\_SB_.ABCD)" would get
16527 optimized to "Method (ABCD)" if the declaration is within the
16528 \_SB_ scope. This optimization is in addition to the named
16529 reference path optimization first released in the previous
16530 version. This would seem to complete all possible optimizations
16531 for namepaths within the ASL/AML.
16533 If the target of a Scope() operator already exists, it must be an
16534 object type that actually opens a scope -- such as a Device,
16535 Method, Scope, etc.
16537 Implemented a check and warning for unreachable code in the same
16538 block below a Return() statement.
16540 Fixed a problem where the listing file was not generated if the
16541 compiler aborted if the maximum error count was exceeded (200).
16543 Fixed a problem where the typechecking of method return values was
16544 broken. This includes the check for a return value when the
16545 method is invoked as a TermArg (a return value is expected.)
16547 Fixed a reported problem where EOF conditions during a quoted
16548 string or comment caused a fault.
16551 ----------------------------------------
16552 15 August 2002. Summary of changes for this release.
16554 1) ACPI CA Core Subsystem Version 20020815:
16556 Fixed a reported problem where a Store to a method argument that
16557 contains a reference did not perform the indirect store correctly.
16558 This problem was created during the conversion to the new
16559 reference object model - the indirect store to a method argument
16560 code was not updated to reflect the new model.
16562 Reworked the ACPI mode change code to better conform to ACPI 2.0,
16563 handle corner cases, and improve code legibility (Kochi Takayoshi)
16565 Fixed a problem with the pathname parsing for the carat (^)
16566 prefix. The heavy use of the carat operator by the new namepath
16567 optimization in the iASL compiler uncovered a problem with the AML
16568 interpreter handling of this prefix. In the case where one or
16569 more carats precede a single nameseg, the nameseg was treated as
16570 standalone and the search rule (to root) was inadvertently
16571 applied. This could cause both the iASL compiler and the
16572 interpreter to find the wrong object or to miss the error that
16573 should occur if the object does not exist at that exact pathname.
16575 Found and fixed the problem where the HP Pavilion DSDT would not
16576 load. This was a relatively minor tweak to the table loading code
16577 (a problem caused by the unexpected encounter with a method
16578 invocation not within a control method), but it does not solve the
16579 overall issue of the execution of AML code at the table level.
16580 This investigation is still ongoing.
16582 Code and Data Size: Current core subsystem library sizes are shown
16583 below. These are the code and data sizes for the acpica.lib
16584 produced by the Microsoft Visual C++ 6.0 compiler, and these
16585 values do not include any ACPI driver or OSPM code. The debug
16586 version of the code includes the debug output trace mechanism and
16587 has a larger code and data size. Note that these values will vary
16588 depending on the efficiency of the compiler and the compiler
16589 options used during generation.
16592 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
16593 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
16595 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
16596 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
16601 Remove redundant slab.h include (Brad Hards)
16603 Fix several bugs in thermal.c (Herbert Nachtnebel)
16605 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
16607 Change acpi_system_suspend to use updated irq functions (Pavel
16610 Export acpi_get_firmware_table (Matthew Wilcox)
16612 Use proper root proc entry for ACPI (Kochi Takayoshi)
16614 Fix early-boot table parsing (Bjorn Helgaas)
16617 3) iASL Compiler/Disassembler
16619 Reworked the compiler options to make them more consistent and to
16620 use two-letter options where appropriate. We were running out of
16621 sensible letters. This may break some makefiles, so check the
16622 current options list by invoking the compiler with no parameters.
16624 Completed the design and implementation of the ASL namepath
16625 optimization option for the compiler. This option optimizes all
16626 references to named objects to the shortest possible path. The
16627 first attempt tries to utilize a single nameseg (4 characters) and
16628 the "search-to-root" algorithm used by the interpreter. If that
16629 cannot be used (because either the name is not in the search path
16630 or there is a conflict with another object with the same name),
16631 the pathname is optimized using the carat prefix (usually a
16632 shorter string than specifying the entire path from the root.)
16634 Implemented support to obtain the DSDT from the Windows registry
16635 (when the disassembly option is specified with no input file).
16636 Added this code as the implementation for AcpiOsTableOverride in
16637 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
16638 utility) to scan memory for the DSDT to the AcpiOsTableOverride
16639 function in the DOS OSL to make the disassembler truly OS
16642 Implemented a new option to disassemble and compile in one step.
16643 When used without an input filename, this option will grab the
16644 DSDT from the local machine, disassemble it, and compile it in one
16647 Added a warning message for invalid escapes (a backslash followed
16648 by any character other than the allowable escapes). This catches
16649 the quoted string error "\_SB_" (which should be "\\_SB_" ).
16651 Also, there are numerous instances in the ACPI specification where
16654 Added a compiler option to disable all optimizations. This is
16655 basically the "compatibility mode" because by using this option,
16656 the AML code will come out exactly the same as other ASL
16659 Added error messages for incorrectly ordered dependent resource
16660 functions. This includes: missing EndDependentFn macro at end of
16661 dependent resource list, nested dependent function macros (both
16662 start and end), and missing StartDependentFn macro. These are
16663 common errors that should be caught at compile time.
16665 Implemented _OSI support for the disassembler and compiler. _OSI
16666 must be included in the namespace for proper disassembly (because
16667 the disassembler must know the number of arguments.)
16669 Added an "optimization" message type that is optional (off by
16670 default). This message is used for all optimizations - including
16671 constant folding, integer optimization, and namepath optimization.
16673 ----------------------------------------
16674 25 July 2002. Summary of changes for this release.
16677 1) ACPI CA Core Subsystem Version 20020725:
16679 The AML Disassembler has been enhanced to produce compilable ASL
16680 code and has been integrated into the iASL compiler (see below) as
16681 well as the single-step disassembly for the AML debugger and the
16682 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
16683 resource templates and macros are fully supported. The
16684 disassembler has been tested on over 30 different AML files,
16685 producing identical AML when the resulting disassembled ASL file
16686 is recompiled with the same ASL compiler.
16688 Modified the Resource Manager to allow zero interrupts and zero
16689 dma channels during the GetCurrentResources call. This was
16690 causing problems on some platforms.
16692 Added the AcpiOsRedirectOutput interface to the OSL to simplify
16693 output redirection for the AcpiOsPrintf and AcpiOsVprintf
16696 Code and Data Size: Current core subsystem library sizes are shown
16697 below. These are the code and data sizes for the acpica.lib
16698 produced by the Microsoft Visual C++ 6.0 compiler, and these
16699 values do not include any ACPI driver or OSPM code. The debug
16700 version of the code includes the debug output trace mechanism and
16701 has a larger code and data size. Note that these values will vary
16702 depending on the efficiency of the compiler and the compiler
16703 options used during generation.
16706 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
16707 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
16709 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
16710 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
16715 Fixed a panic in the EC driver (Dominik Brodowski)
16717 Implemented checksum of the R/XSDT itself during Linux table scan
16723 The AML disassembler is integrated into the compiler. The "-d"
16724 option invokes the disassembler to completely disassemble an
16725 input AML file, producing as output a text ASL file with the
16726 extension ".dsl" (to avoid name collisions with existing .asl
16727 source files.) A future enhancement will allow the disassembler
16728 to obtain the BIOS DSDT from the registry under Windows.
16730 Fixed a problem with the VendorShort and VendorLong resource
16731 descriptors where an invalid AML sequence was created.
16733 Implemented a fix for BufferData term in the ASL parser. It was
16734 inadvertently defined twice, allowing invalid syntax to pass and
16735 causing reduction conflicts.
16737 Fixed a problem where the Ones opcode could get converted to a
16738 value of zero if "Ones" was used where a byte, word or dword value
16739 was expected. The 64-bit value is now truncated to the correct
16740 size with the correct value.
16744 ----------------------------------------
16745 02 July 2002. Summary of changes for this release.
16748 1) ACPI CA Core Subsystem Version 20020702:
16750 The Table Manager code has been restructured to add several new
16751 features. Tables that are not required by the core subsystem
16752 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
16753 validated in any way and are returned from AcpiGetFirmwareTable if
16754 requested. The AcpiOsTableOverride interface is now called for
16755 each table that is loaded by the subsystem in order to allow the
16756 host to override any table it chooses. Previously, only the DSDT
16757 could be overridden. Added one new files, tbrsdt.c and
16760 Fixed a problem with the conversion of internal package objects to
16761 external objects (when a package is returned from a control
16762 method.) The return buffer length was set to zero instead of the
16763 proper length of the package object.
16765 Fixed a reported problem with the use of the RefOf and DeRefOf
16766 operators when passing reference arguments to control methods. A
16767 new type of Reference object is used internally for references
16768 produced by the RefOf operator.
16770 Added additional error messages in the Resource Manager to explain
16771 AE_BAD_DATA errors when they occur during resource parsing.
16773 Split the AcpiEnableSubsystem into two primitives to enable a
16774 finer granularity initialization sequence. These two calls should
16775 be called in this order: AcpiEnableSubsystem (flags),
16776 AcpiInitializeObjects (flags). The flags parameter remains the
16782 Updated the ACPI utilities module to understand the new style of
16783 fully resolved package objects that are now returned from the core
16784 subsystem. This eliminates errors of the form:
16786 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
16787 acpi_utils-0430 [145] acpi_evaluate_reference:
16788 Invalid element in package (not a device reference)
16790 The method evaluation utility uses the new buffer allocation
16791 scheme instead of calling AcpiEvaluate Object twice.
16793 Added support for ECDT. This allows the use of the Embedded
16795 Controller before the namespace has been fully initialized, which
16796 is necessary for ACPI 2.0 support, and for some laptops to
16797 initialize properly. (Laptops using ECDT are still rare, so only
16798 limited testing was performed of the added functionality.)
16800 Fixed memory leaks in the EC driver.
16802 Eliminated a brittle code structure in acpi_bus_init().
16804 Eliminated the acpi_evaluate() helper function in utils.c. It is
16805 no longer needed since acpi_evaluate_object can optionally
16806 allocate memory for the return object.
16808 Implemented fix for keyboard hang when getting battery readings on
16809 some systems (Stephen White)
16811 PCI IRQ routing update (Dominik Brodowski)
16813 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
16816 ----------------------------------------
16817 11 June 2002. Summary of changes for this release.
16820 1) ACPI CA Core Subsystem Version 20020611:
16822 Fixed a reported problem where constants such as Zero and One
16823 appearing within _PRT packages were not handled correctly within
16824 the resource manager code. Originally reported against the ASL
16825 compiler because the code generator now optimizes integers to
16826 their minimal AML representation (i.e. AML constants if possible.)
16827 The _PRT code now handles all AML constant opcodes correctly
16828 (Zero, One, Ones, Revision).
16830 Fixed a problem with the Concatenate operator in the AML
16831 interpreter where a buffer result object was incorrectly marked as
16832 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
16834 All package sub-objects are now fully resolved before they are
16835 returned from the external ACPI interfaces. This means that name
16836 strings are resolved to object handles, and constant operators
16837 (Zero, One, Ones, Revision) are resolved to Integers.
16839 Implemented immediate resolution of the AML Constant opcodes
16840 (Zero, One, Ones, Revision) to Integer objects upon detection
16841 within the AML stream. This has simplified and reduced the
16842 generated code size of the subsystem by eliminating about 10
16843 switch statements for these constants (which previously were
16844 contained in Reference objects.) The complicating issues are that
16845 the Zero opcode is used as a "placeholder" for unspecified
16846 optional target operands and stores to constants are defined to be
16849 Code and Data Size: Current core subsystem library sizes are shown
16850 below. These are the code and data sizes for the acpica.lib
16851 produced by the Microsoft Visual C++ 6.0 compiler, and these
16852 values do not include any ACPI driver or OSPM code. The debug
16853 version of the code includes the debug output trace mechanism and
16854 has a larger code and data size. Note that these values will vary
16855 depending on the efficiency of the compiler and the compiler
16856 options used during generation.
16859 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
16860 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
16862 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
16863 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
16869 Added preliminary support for obtaining _TRA data for PCI root
16870 bridges (Bjorn Helgaas).
16873 3) iASL Compiler Version X2046:
16875 Fixed a problem where the "_DDN" reserved name was defined to be a
16876 control method with one argument. There are no arguments, and
16877 _DDN does not have to be a control method.
16879 Fixed a problem with the Linux version of the compiler where the
16880 source lines printed with error messages were the wrong lines.
16881 This turned out to be the "LF versus CR/LF" difference between
16882 Windows and Unix. This appears to be the longstanding issue
16883 concerning listing output and error messages.
16885 Fixed a problem with the Linux version of compiler where opcode
16886 names within error messages were wrong. This was caused by a
16887 slight difference in the output of the Flex tool on Linux versus
16890 Fixed a problem with the Linux compiler where the hex output files
16891 contained some garbage data caused by an internal buffer overrun.
16894 ----------------------------------------
16895 17 May 2002. Summary of changes for this release.
16898 1) ACPI CA Core Subsystem Version 20020517:
16900 Implemented a workaround to an BIOS bug discovered on the HP
16901 OmniBook where the FADT revision number and the table size are
16902 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
16903 behavior is to fallback to using only the ACPI 1.0 fields of the
16904 FADT if the table is too small to be a ACPI 2.0 table as claimed
16905 by the revision number. Although this is a BIOS bug, this is a
16906 case where the workaround is simple enough and with no side
16907 effects, so it seemed prudent to add it. A warning message is
16910 Implemented minimum size checks for the fixed-length ACPI tables -
16911 - the FADT and FACS, as well as consistency checks between the
16912 revision number and the table size.
16914 Fixed a reported problem in the table override support where the
16915 new table pointer was incorrectly treated as a physical address
16916 instead of a logical address.
16918 Eliminated the use of the AE_AML_ERROR exception and replaced it
16919 with more descriptive codes.
16921 Fixed a problem where an exception would occur if an ASL Field was
16922 defined with no named Field Units underneath it (used by some
16925 Code and Data Size: Current core subsystem library sizes are shown
16926 below. These are the code and data sizes for the acpica.lib
16927 produced by the Microsoft Visual C++ 6.0 compiler, and these
16928 values do not include any ACPI driver or OSPM code. The debug
16929 version of the code includes the debug output trace mechanism and
16930 has a larger code and data size. Note that these values will vary
16931 depending on the efficiency of the compiler and the compiler
16932 options used during generation.
16935 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
16936 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
16938 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
16939 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
16945 Much work done on ACPI init (MADT and PCI IRQ routing support).
16946 (Paul D. and Dominik Brodowski)
16948 Fix PCI IRQ-related panic on boot (Sam Revitch)
16950 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
16952 Fix "MHz" typo (Dominik Brodowski)
16954 Fix RTC year 2000 issue (Dominik Brodowski)
16956 Preclude multiple button proc entries (Eric Brunet)
16958 Moved arch-specific code out of include/platform/aclinux.h
16960 3) iASL Compiler Version X2044:
16962 Implemented error checking for the string used in the EISAID macro
16963 (Usually used in the definition of the _HID object.) The code now
16964 strictly enforces the PnP format - exactly 7 characters, 3
16965 uppercase letters and 4 hex digits.
16967 If a raw string is used in the definition of the _HID object
16968 (instead of the EISAID macro), the string must contain all
16969 alphanumeric characters (e.g., "*PNP0011" is not allowed because
16972 Implemented checking for invalid use of ACPI reserved names for
16973 most of the name creation operators (Name, Device, Event, Mutex,
16974 OperationRegion, PowerResource, Processor, and ThermalZone.)
16975 Previously, this check was only performed for control methods.
16977 Implemented an additional check on the Name operator to emit an
16978 error if a reserved name that must be implemented in ASL as a
16979 control method is used. We know that a reserved name must be a
16980 method if it is defined with input arguments.
16982 The warning emitted when a namespace object reference is not found
16983 during the cross reference phase has been changed into an error.
16984 The "External" directive should be used for names defined in other
16988 4) Tools and Utilities
16990 The 16-bit tools (adump16 and aexec16) have been regenerated and
16993 Fixed a problem with the output of both acpidump and adump16 where
16994 the indentation of closing parentheses and brackets was not
16996 aligned properly with the parent block.
16999 ----------------------------------------
17000 03 May 2002. Summary of changes for this release.
17003 1) ACPI CA Core Subsystem Version 20020503:
17005 Added support a new OSL interface that allows the host operating
17007 system software to override the DSDT found in the firmware -
17008 AcpiOsTableOverride. With this interface, the OSL can examine the
17009 version of the firmware DSDT and replace it with a different one
17012 Added new external interfaces for accessing ACPI registers from
17013 device drivers and other system software - AcpiGetRegister and
17014 AcpiSetRegister. This was simply an externalization of the
17015 existing AcpiHwBitRegister interfaces.
17017 Fixed a regression introduced in the previous build where the
17018 ASL/AML CreateField operator always returned an error,
17019 "destination must be a NS Node".
17021 Extended the maximum time (before failure) to successfully enable
17022 ACPI mode to 3 seconds.
17024 Code and Data Size: Current core subsystem library sizes are shown
17025 below. These are the code and data sizes for the acpica.lib
17026 produced by the Microsoft Visual C++ 6.0 compiler, and these
17027 values do not include any ACPI driver or OSPM code. The debug
17028 version of the code includes the debug output trace mechanism and
17029 has a larger code and data size. Note that these values will vary
17030 depending on the efficiency of the compiler and the compiler
17031 options used during generation.
17034 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
17035 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
17037 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
17038 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
17043 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
17044 free. While 3 out of 4 of our in-house systems work fine, the last
17045 one still hangs when testing the LAPIC timer.
17047 Renamed many files in 2.5 kernel release to omit "acpi_" from the
17050 Added warning on boot for Presario 711FR.
17052 Sleep improvements (Pavel Machek)
17054 ACPI can now be built without CONFIG_PCI enabled.
17056 IA64: Fixed memory map functions (JI Lee)
17059 3) iASL Compiler Version X2043:
17061 Added support to allow the compiler to be integrated into the MS
17062 VC++ development environment for one-button compilation of single
17063 files or entire projects -- with error-to-source-line mapping.
17065 Implemented support for compile-time constant folding for the
17066 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
17067 specification. This allows the ASL writer to use expressions
17068 instead of Integer/Buffer/String constants in terms that must
17069 evaluate to constants at compile time and will also simplify the
17070 emitted AML in any such sub-expressions that can be folded
17071 (evaluated at compile-time.) This increases the size of the
17072 compiler significantly because a portion of the ACPI CA AML
17073 interpreter is included within the compiler in order to pre-
17074 evaluate constant expressions.
17077 Fixed a problem with the "Unicode" ASL macro that caused the
17078 compiler to fault. (This macro is used in conjunction with the
17079 _STR reserved name.)
17081 Implemented an AML opcode optimization to use the Zero, One, and
17082 Ones opcodes where possible to further reduce the size of integer
17083 constants and thus reduce the overall size of the generated AML
17086 Implemented error checking for new reserved terms for ACPI version
17089 Implemented the -qr option to display the current list of ACPI
17090 reserved names known to the compiler.
17092 Implemented the -qc option to display the current list of ASL
17093 operators that are allowed within constant expressions and can
17094 therefore be folded at compile time if the operands are constants.
17099 Updated the Programmer's Reference for new interfaces, data types,
17100 and memory allocation model options.
17102 Updated the iASL Compiler User Reference to apply new format and
17103 add information about new features and options.
17105 ----------------------------------------
17106 19 April 2002. Summary of changes for this release.
17108 1) ACPI CA Core Subsystem Version 20020419:
17110 The source code base for the Core Subsystem has been completely
17111 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
17112 versions. The Lint option files used are included in the
17113 /acpi/generate/lint directory.
17115 Implemented enhanced status/error checking across the entire
17116 Hardware manager subsystem. Any hardware errors (reported from
17117 the OSL) are now bubbled up and will abort a running control
17121 Fixed a problem where the per-ACPI-table integer width (32 or 64)
17122 was stored only with control method nodes, causing a fault when
17123 non-control method code was executed during table loading. The
17124 solution implemented uses a global variable to indicate table
17125 width across the entire ACPI subsystem. Therefore, ACPI CA does
17126 not support mixed integer widths across different ACPI tables
17129 Fixed a problem where NULL extended fields (X fields) in an ACPI
17130 2.0 ACPI FADT caused the table load to fail. Although the
17131 existing ACPI specification is a bit fuzzy on this topic, the new
17132 behavior is to fall back on a ACPI 1.0 field if the corresponding
17133 ACPI 2.0 X field is zero (even though the table revision indicates
17134 a full ACPI 2.0 table.) The ACPI specification will be updated to
17135 clarify this issue.
17137 Fixed a problem with the SystemMemory operation region handler
17138 where memory was always accessed byte-wise even if the AML-
17139 specified access width was larger than a byte. This caused
17140 problems on systems with memory-mapped I/O. Memory is now
17141 accessed with the width specified. On systems that do not support
17142 non-aligned transfers, a check is made to guarantee proper address
17143 alignment before proceeding in order to avoid an AML-caused
17144 alignment fault within the kernel.
17147 Fixed a problem with the ExtendedIrq resource where only one byte
17148 of the 4-byte Irq field was extracted.
17150 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
17151 function was out of date and required a rewrite.
17153 Code and Data Size: Current core subsystem library sizes are shown
17154 below. These are the code and data sizes for the acpica.lib
17155 produced by the Microsoft Visual C++ 6.0 compiler, and these
17156 values do not include any ACPI driver or OSPM code. The debug
17157 version of the code includes the debug output trace mechanism and
17158 has a larger code and data size. Note that these values will vary
17159 depending on the efficiency of the compiler and the compiler
17160 options used during generation.
17163 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
17164 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
17166 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
17167 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
17172 PCI IRQ routing fixes (Dominik Brodowski)
17175 3) iASL Compiler Version X2042:
17177 Implemented an additional compile-time error check for a field
17178 unit whose size + minimum access width would cause a run-time
17179 access beyond the end-of-region. Previously, only the field size
17180 itself was checked.
17182 The Core subsystem and iASL compiler now share a common parse
17183 object in preparation for compile-time evaluation of the type
17184 3/4/5 ASL operators.
17187 ----------------------------------------
17188 Summary of changes for this release: 03_29_02
17190 1) ACPI CA Core Subsystem Version 20020329:
17192 Implemented support for late evaluation of TermArg operands to
17193 Buffer and Package objects. This allows complex expressions to be
17194 used in the declarations of these object types.
17196 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
17197 1.0, if the field was larger than 32 bits, it was returned as a
17198 buffer - otherwise it was returned as an integer. In ACPI 2.0,
17199 the field is returned as a buffer only if the field is larger than
17200 64 bits. The TableRevision is now considered when making this
17201 conversion to avoid incompatibility with existing ASL code.
17203 Implemented logical addressing for AcpiOsGetRootPointer. This
17204 allows an RSDP with either a logical or physical address. With
17205 this support, the host OS can now override all ACPI tables with
17206 one logical RSDP. Includes implementation of "typed" pointer
17207 support to allow a common data type for both physical and logical
17208 pointers internally. This required a change to the
17209 AcpiOsGetRootPointer interface.
17211 Implemented the use of ACPI 2.0 Generic Address Structures for all
17212 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
17213 mapped I/O for these ACPI features.
17215 Initialization now ignores not only non-required tables (All
17216 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
17217 not validate the table headers of unrecognized tables.
17219 Fixed a problem where a notify handler could only be
17220 installed/removed on an object of type Device. All "notify"
17222 objects are now supported -- Devices, Processor, Power, and
17225 Removed most verbosity from the ACPI_DB_INFO debug level. Only
17226 critical information is returned when this debug level is enabled.
17228 Code and Data Size: Current core subsystem library sizes are shown
17229 below. These are the code and data sizes for the acpica.lib
17230 produced by the Microsoft Visual C++ 6.0 compiler, and these
17231 values do not include any ACPI driver or OSPM code. The debug
17232 version of the code includes the debug output trace mechanism and
17233 has a larger code and data size. Note that these values will vary
17234 depending on the efficiency of the compiler and the compiler
17235 options used during generation.
17238 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
17239 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
17241 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
17242 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
17247 The processor driver (acpi_processor.c) now fully supports ACPI
17248 2.0-based processor performance control (e.g. Intel(R)
17249 SpeedStep(TM) technology) Note that older laptops that only have
17250 the Intel "applet" interface are not supported through this. The
17251 'limit' and 'performance' interface (/proc) are fully functional.
17252 [Note that basic policy for controlling performance state
17253 transitions will be included in the next version of ospmd.] The
17254 idle handler was modified to more aggressively use C2, and PIIX4
17255 errata handling underwent a complete overhaul (big thanks to
17256 Dominik Brodowski).
17258 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
17259 based devices in the ACPI namespace are now dynamically bound
17260 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
17261 This allows, among other things, ACPI to resolve bus numbers for
17262 subordinate PCI bridges.
17264 Enhanced PCI IRQ routing to get the proper bus number for _PRT
17265 entries defined underneath PCI bridges.
17267 Added IBM 600E to bad bios list due to invalid _ADR value for
17268 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
17270 In the process of adding full MADT support (e.g. IOAPIC) for IA32
17271 (acpi.c, mpparse.c) -- stay tuned.
17273 Added back visual differentiation between fixed-feature and
17274 control-method buttons in dmesg. Buttons are also subtyped (e.g.
17275 button/power/PWRF) to simplify button identification.
17277 We no longer use -Wno-unused when compiling debug. Please ignore
17278 any "_THIS_MODULE defined but not used" messages.
17280 Can now shut down the system using "magic sysrq" key.
17283 3) iASL Compiler version 2041:
17285 Fixed a problem where conversion errors for hex/octal/decimal
17286 constants were not reported.
17288 Implemented a fix for the General Register template Address field.
17289 This field was 8 bits when it should be 64.
17291 Fixed a problem where errors/warnings were no longer being emitted
17292 within the listing output file.
17294 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
17295 exactly 4 characters, alphanumeric only.
17300 ----------------------------------------
17301 Summary of changes for this release: 03_08_02
17304 1) ACPI CA Core Subsystem Version 20020308:
17306 Fixed a problem with AML Fields where the use of the "AccessAny"
17307 keyword could cause an interpreter error due to attempting to read
17308 or write beyond the end of the parent Operation Region.
17310 Fixed a problem in the SystemMemory Operation Region handler where
17311 an attempt was made to map memory beyond the end of the region.
17312 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
17313 errors on some Linux systems.
17315 Fixed a problem where the interpreter/namespace "search to root"
17316 algorithm was not functioning for some object types. Relaxed the
17317 internal restriction on the search to allow upsearches for all
17318 external object types as well as most internal types.
17323 We now use safe_halt() macro versus individual calls to sti | hlt.
17325 Writing to the processor limit interface should now work. "echo 1"
17326 will increase the limit, 2 will decrease, and 0 will reset to the
17333 Fixed segfault on Linux version.
17336 ----------------------------------------
17337 Summary of changes for this release: 02_25_02
17339 1) ACPI CA Core Subsystem:
17342 Fixed a problem where the GPE bit masks were not initialized
17343 properly, causing erratic GPE behavior.
17345 Implemented limited support for multiple calling conventions. The
17346 code can be generated with either the VPL (variable parameter
17347 list, or "C") convention, or the FPL (fixed parameter list, or
17348 "Pascal") convention. The core subsystem is about 3.4% smaller
17349 when generated with FPL.
17354 Re-add some /proc/acpi/event functionality that was lost during
17357 Resolved issue with /proc events for fixed-feature buttons showing
17358 up as the system device.
17360 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
17362 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
17364 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
17366 Fixed limit interface & usage to fix bugs with passive cooling
17369 Restructured PRT support.
17372 ----------------------------------------
17373 Summary of changes for this label: 02_14_02
17376 1) ACPI CA Core Subsystem:
17378 Implemented support in AcpiLoadTable to allow loading of FACS and
17381 Support for the now-obsolete interim 0.71 64-bit ACPI tables has
17382 been removed. All 64-bit platforms should be migrated to the ACPI
17383 2.0 tables. The actbl71.h header has been removed from the source
17386 All C macros defined within the subsystem have been prefixed with
17387 "ACPI_" to avoid collision with other system include files.
17389 Removed the return value for the two AcpiOsPrint interfaces, since
17390 it is never used and causes lint warnings for ignoring the return
17393 Added error checking to all internal mutex acquire and release
17394 calls. Although a failure from one of these interfaces is
17395 probably a fatal system error, these checks will cause the
17396 immediate abort of the currently executing method or interface.
17398 Fixed a problem where the AcpiSetCurrentResources interface could
17399 fault. This was a side effect of the deployment of the new memory
17402 Fixed a couple of problems with the Global Lock support introduced
17403 in the last major build. The "common" (1.0/2.0) internal FACS was
17404 being overwritten with the FACS signature and clobbering the
17405 Global Lock pointer. Also, the actual firmware FACS was being
17406 unmapped after construction of the "common" FACS, preventing
17407 access to the actual Global Lock field within it. The "common"
17408 internal FACS is no longer installed as an actual ACPI table; it
17409 is used simply as a global.
17411 Code and Data Size: Current core subsystem library sizes are shown
17412 below. These are the code and data sizes for the acpica.lib
17413 produced by the Microsoft Visual C++ 6.0 compiler, and these
17414 values do not include any ACPI driver or OSPM code. The debug
17415 version of the code includes the debug output trace mechanism and
17416 has a larger code and data size. Note that these values will vary
17417 depending on the efficiency of the compiler and the compiler
17418 options used during generation.
17420 Previous Release (02_07_01)
17421 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
17422 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
17424 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
17425 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
17430 Updated Linux-specific code for core macro and OSL interface
17431 changes described above.
17433 Improved /proc/acpi/event. It now can be opened only once and has
17434 proper poll functionality.
17436 Fixed and restructured power management (acpi_bus).
17438 Only create /proc "view by type" when devices of that class exist.
17440 Fixed "charging/discharging" bug (and others) in acpi_battery.
17442 Improved thermal zone code.
17445 3) ASL Compiler, version X2039:
17448 Implemented the new compiler restriction on ASL String hex/octal
17449 escapes to non-null, ASCII values. An error results if an invalid
17450 value is used. (This will require an ACPI 2.0 specification
17453 AML object labels that are output to the optional C and ASM source
17454 are now prefixed with both the ACPI table signature and table ID
17455 to help guarantee uniqueness within a large BIOS project.
17458 ----------------------------------------
17459 Summary of changes for this label: 02_01_02
17461 1) ACPI CA Core Subsystem:
17463 ACPI 2.0 support is complete in the entire Core Subsystem and the
17464 ASL compiler. All new ACPI 2.0 operators are implemented and all
17465 other changes for ACPI 2.0 support are complete. With
17466 simultaneous code and data optimizations throughout the subsystem,
17467 ACPI 2.0 support has been implemented with almost no additional
17468 cost in terms of code and data size.
17470 Implemented a new mechanism for allocation of return buffers. If
17471 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
17472 be allocated on behalf of the caller. Consolidated all return
17473 buffer validation and allocation to a common procedure. Return
17474 buffers will be allocated via the primary OSL allocation interface
17475 since it appears that a separate pool is not needed by most users.
17476 If a separate pool is required for these buffers, the caller can
17477 still use the original mechanism and pre-allocate the buffer(s).
17479 Implemented support for string operands within the DerefOf
17482 Restructured the Hardware and Event managers to be table driven,
17483 simplifying the source code and reducing the amount of generated
17486 Split the common read/write low-level ACPI register bitfield
17487 procedure into a separate read and write, simplifying the code
17490 Obsoleted the AcpiOsCallocate OSL interface. This interface was
17491 used only a handful of times and didn't have enough critical mass
17492 for a separate interface. Replaced with a common calloc procedure
17495 Fixed a reported problem with the GPE number mapping mechanism
17496 that allows GPE1 numbers to be non-contiguous with GPE0.
17497 Reorganized the GPE information and shrunk a large array that was
17498 originally large enough to hold info for all possible GPEs (256)
17499 to simply large enough to hold all GPEs up to the largest GPE
17500 number on the machine.
17502 Fixed a reported problem with resource structure alignment on 64-
17505 Changed the AcpiEnableEvent and AcpiDisableEvent external
17506 interfaces to not require any flags for the common case of
17507 enabling/disabling a GPE.
17509 Implemented support to allow a "Notify" on a Processor object.
17511 Most TBDs in comments within the source code have been resolved
17515 Fixed a problem in the interpreter where a standalone parent
17516 prefix (^) was not handled correctly in the interpreter and
17519 Removed obsolete and unnecessary GPE save/restore code.
17521 Implemented Field support in the ASL Load operator. This allows a
17522 table to be loaded from a named field, in addition to loading a
17523 table directly from an Operation Region.
17525 Implemented timeout and handle support in the external Global Lock
17528 Fixed a problem in the AcpiDump utility where pathnames were no
17529 longer being generated correctly during the dump of named objects.
17531 Modified the AML debugger to give a full display of if/while
17532 predicates instead of just one AML opcode at a time. (The
17533 predicate can have several nested ASL statements.) The old method
17534 was confusing during single stepping.
17536 Code and Data Size: Current core subsystem library sizes are shown
17537 below. These are the code and data sizes for the acpica.lib
17538 produced by the Microsoft Visual C++ 6.0 compiler, and these
17539 values do not include any ACPI driver or OSPM code. The debug
17540 version of the code includes the debug output trace mechanism and
17541 has a larger code and data size. Note that these values will vary
17542 depending on the efficiency of the compiler and the compiler
17543 options used during generation.
17545 Previous Release (12_18_01)
17546 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
17547 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
17549 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
17550 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
17554 Implemented fix for PIIX reverse throttling errata (Processor
17557 Added new Limit interface (Processor and Thermal drivers)
17559 New thermal policy (Thermal driver)
17561 Many updates to /proc
17563 Battery "low" event support (Battery driver)
17565 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
17567 IA32 - IA64 initialization unification, no longer experimental
17569 Menuconfig options redesigned
17571 3) ASL Compiler, version X2037:
17573 Implemented several new output features to simplify integration of
17574 AML code into firmware: 1) Output the AML in C source code with
17575 labels for each named ASL object. The original ASL source code
17576 is interleaved as C comments. 2) Output the AML in ASM source code
17577 with labels and interleaved ASL source. 3) Output the AML in
17578 raw hex table form, in either C or ASM.
17580 Implemented support for optional string parameters to the
17581 LoadTable operator.
17583 Completed support for embedded escape sequences within string
17584 literals. The compiler now supports all single character escapes
17585 as well as the Octal and Hex escapes. Note: the insertion of a
17586 null byte into a string literal (via the hex/octal escape) causes
17587 the string to be immediately terminated. A warning is issued.
17589 Fixed a problem where incorrect AML was generated for the case
17590 where an ASL namepath consists of a single parent prefix (
17592 ) with no trailing name segments.
17594 The compiler has been successfully generated with a 64-bit C
17600 ----------------------------------------
17601 Summary of changes for this label: 12_18_01
17605 Enhanced blacklist with reason and severity fields. Any table's
17606 signature may now be used to identify a blacklisted system.
17608 Call _PIC control method to inform the firmware which interrupt
17609 model the OS is using. Turn on any disabled link devices.
17611 Cleaned up busmgr /proc error handling (Andreas Dilger)
17613 2) ACPI CA Core Subsystem:
17615 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
17618 Completed implementation of the ACPI 2.0 "Continue",
17619 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
17620 operators. All new ACPI 2.0 operators are now implemented in both
17621 the ASL compiler and the AML interpreter. The only remaining ACPI
17622 2.0 task is support for the String data type in the DerefOf
17623 operator. Fixed a problem with AcquireMutex where the status code
17624 was lost if the caller had to actually wait for the mutex.
17626 Increased the maximum ASL Field size from 64K bits to 4G bits.
17628 Completed implementation of the external Global Lock interfaces --
17629 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
17630 Handler parameters were added.
17632 Completed another pass at removing warnings and issues when
17633 compiling with 64-bit compilers. The code now compiles cleanly
17634 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
17635 add and subtract (diff) macros have changed considerably.
17638 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
17639 64-bit platforms, 32-bits on all others. This type is used
17640 wherever memory allocation and/or the C sizeof() operator is used,
17641 and affects the OSL memory allocation interfaces AcpiOsAllocate
17642 and AcpiOsCallocate.
17644 Implemented sticky user breakpoints in the AML debugger.
17646 Code and Data Size: Current core subsystem library sizes are shown
17647 below. These are the code and data sizes for the acpica.lib
17648 produced by the Microsoft Visual C++ 6.0 compiler, and these
17649 values do not include any ACPI driver or OSPM code. The debug
17650 version of the code includes the debug output trace mechanism and
17651 has a larger code and data size. Note that these values will vary
17652 depending on the efficiency of the compiler and the compiler
17653 options used during generation.
17655 Previous Release (12_05_01)
17656 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
17657 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
17659 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
17660 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
17662 3) ASL Compiler, version X2034:
17664 Now checks for (and generates an error if detected) the use of a
17665 Break or Continue statement without an enclosing While statement.
17668 Successfully generated the compiler with the Intel 64-bit C
17671 ----------------------------------------
17672 Summary of changes for this label: 12_05_01
17674 1) ACPI CA Core Subsystem:
17676 The ACPI 2.0 CopyObject operator is fully implemented. This
17677 operator creates a new copy of an object (and is also used to
17678 bypass the "implicit conversion" mechanism of the Store operator.)
17680 The ACPI 2.0 semantics for the SizeOf operator are fully
17681 implemented. The change is that performing a SizeOf on a
17682 reference object causes an automatic dereference of the object to
17683 the actual value before the size is evaluated. This behavior was
17684 undefined in ACPI 1.0.
17686 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
17687 have been implemented. The interrupt polarity and mode are now
17690 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
17691 appearing in Package objects were not properly converted to
17692 integers when the internal Package was converted to an external
17693 object (via the AcpiEvaluateObject interface.)
17695 Fixed a problem with the namespace object deletion mechanism for
17696 objects created by control methods. There were two parts to this
17697 problem: 1) Objects created during the initialization phase method
17698 parse were not being deleted, and 2) The object owner ID mechanism
17699 to track objects was broken.
17701 Fixed a problem where the use of the ASL Scope operator within a
17702 control method would result in an invalid opcode exception.
17704 Fixed a problem introduced in the previous label where the buffer
17705 length required for the _PRT structure was not being returned
17708 Code and Data Size: Current core subsystem library sizes are shown
17709 below. These are the code and data sizes for the acpica.lib
17710 produced by the Microsoft Visual C++ 6.0 compiler, and these
17711 values do not include any ACPI driver or OSPM code. The debug
17712 version of the code includes the debug output trace mechanism and
17713 has a larger code and data size. Note that these values will vary
17714 depending on the efficiency of the compiler and the compiler
17715 options used during generation.
17717 Previous Release (11_20_01)
17718 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
17719 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
17722 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
17723 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
17727 Updated all files to apply cleanly against 2.4.16.
17729 Added basic PCI Interrupt Routing Table (PRT) support for IA32
17730 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
17731 version supports both static and dynamic PRT entries, but dynamic
17732 entries are treated as if they were static (not yet
17733 reconfigurable). Architecture- specific code to use this data is
17734 absent on IA32 but should be available shortly.
17736 Changed the initialization sequence to start the ACPI interpreter
17737 (acpi_init) prior to initialization of the PCI driver (pci_init)
17738 in init/main.c. This ordering is required to support PRT and
17739 facilitate other (future) enhancement. A side effect is that the
17740 ACPI bus driver and certain device drivers can no longer be loaded
17743 Modified the 'make menuconfig' options to allow PCI Interrupt
17744 Routing support to be included without the ACPI Bus and other
17747 3) ASL Compiler, version X2033:
17749 Fixed some issues with the use of the new CopyObject and
17750 DataTableRegion operators. Both are fully functional.
17752 ----------------------------------------
17753 Summary of changes for this label: 11_20_01
17755 20 November 2001. Summary of changes for this release.
17757 1) ACPI CA Core Subsystem:
17759 Updated Index support to match ACPI 2.0 semantics. Storing a
17760 Integer, String, or Buffer to an Index of a Buffer will store only
17761 the least-significant byte of the source to the Indexed buffer
17762 byte. Multiple writes are not performed.
17764 Fixed a problem where the access type used in an AccessAs ASL
17765 operator was not recorded correctly into the field object.
17767 Fixed a problem where ASL Event objects were created in a
17768 signalled state. Events are now created in an unsignalled state.
17770 The internal object cache is now purged after table loading and
17771 initialization to reduce the use of dynamic kernel memory -- on
17772 the assumption that object use is greatest during the parse phase
17773 of the entire table (versus the run-time use of individual control
17776 ACPI 2.0 variable-length packages are now fully operational.
17778 Code and Data Size: Code and Data optimizations have permitted new
17779 feature development with an actual reduction in the library size.
17780 Current core subsystem library sizes are shown below. These are
17781 the code and data sizes for the acpica.lib produced by the
17782 Microsoft Visual C++ 6.0 compiler, and these values do not include
17783 any ACPI driver or OSPM code. The debug version of the code
17784 includes the debug output trace mechanism and has a larger code
17785 and data size. Note that these values will vary depending on the
17786 efficiency of the compiler and the compiler options used during
17789 Previous Release (11_09_01):
17790 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
17791 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
17794 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
17795 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
17799 Enhanced the ACPI boot-time initialization code to allow the use
17800 of Local APIC tables for processor enumeration on IA-32, and to
17801 pave the way for a fully MPS-free boot (on SMP systems) in the
17802 near future. This functionality replaces
17803 arch/i386/kernel/acpitables.c, which was introduced in an earlier
17804 2.4.15-preX release. To enable this feature you must add
17805 "acpi_boot=on" to the kernel command line -- see the help entry
17806 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
17809 Restructured the configuration options to allow boot-time table
17810 parsing support without inclusion of the ACPI Interpreter (and
17813 NOTE: This release does not include fixes for the reported events,
17814 power-down, and thermal passive cooling issues (coming soon).
17818 Added additional typechecking for Fields within restricted access
17819 Operation Regions. All fields within EC and CMOS regions must be
17820 declared with ByteAcc. All fields within SMBus regions must be
17821 declared with the BufferAcc access type.
17823 Fixed a problem where the listing file output of control methods
17824 no longer interleaved the actual AML code with the ASL source
17830 ----------------------------------------
17831 Summary of changes for this label: 11_09_01
17833 1) ACPI CA Core Subsystem:
17835 Implemented ACPI 2.0-defined support for writes to fields with a
17836 Buffer, String, or Integer source operand that is smaller than the
17837 target field. In these cases, the source operand is zero-extended
17838 to fill the target field.
17840 Fixed a problem where a Field starting bit offset (within the
17841 parent operation region) was calculated incorrectly if the
17843 alignment of the field differed from the access width. This
17844 affected CreateWordField, CreateDwordField, CreateQwordField, and
17845 possibly other fields that use the "AccessAny" keyword.
17847 Fixed a problem introduced in the 11_02_01 release where indirect
17848 stores through method arguments did not operate correctly.
17852 Implemented boot-time ACPI table parsing support
17853 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
17854 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
17855 legacy BIOS interfaces (e.g. MPS) for the configuration of system
17856 processors, memory, and interrupts during setup_arch(). Note that
17857 this patch does not include the required architecture-specific
17858 changes required to apply this information -- subsequent patches
17859 will be posted for both IA32 and IA64 to achieve this.
17861 Added low-level sleep support for IA32 platforms, courtesy of Pat
17862 Mochel. This allows IA32 systems to transition to/from various
17863 sleeping states (e.g. S1, S3), although the lack of a centralized
17864 driver model and power-manageable drivers will prevent its
17865 (successful) use on most systems.
17867 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
17868 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
17869 tables" option, etc.
17871 Increased the default timeout for the EC driver from 1ms to 10ms
17872 (1000 cycles of 10us) to try to address AE_TIME errors during EC
17875 ----------------------------------------
17876 Summary of changes for this label: 11_02_01
17878 1) ACPI CA Core Subsystem:
17880 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
17881 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
17884 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
17885 changes to support ACPI 2.0 Qword field access. Read/Write
17886 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
17887 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
17888 the value parameter for the address space handler interface is now
17889 an ACPI_INTEGER. OSL implementations of these interfaces must now
17890 handle the case where the Width parameter is 64.
17892 Index Fields: Fixed a problem where unaligned bit assembly and
17893 disassembly for IndexFields was not supported correctly.
17895 Index and Bank Fields: Nested Index and Bank Fields are now
17896 supported. During field access, a check is performed to ensure
17897 that the value written to an Index or Bank register is not out of
17898 the range of the register. The Index (or Bank) register is
17899 written before each access to the field data. Future support will
17900 include allowing individual IndexFields to be wider than the
17901 DataRegister width.
17903 Fields: Fixed a problem where the AML interpreter was incorrectly
17904 attempting to write beyond the end of a Field/OpRegion. This was
17905 a boundary case that occurred when a DWORD field was written to a
17906 BYTE access OpRegion, forcing multiple writes and causing the
17907 interpreter to write one datum too many.
17909 Fields: Fixed a problem with Field/OpRegion access where the
17910 starting bit address of a field was incorrectly calculated if the
17911 current access type was wider than a byte (WordAcc, DwordAcc, or
17914 Fields: Fixed a problem where forward references to individual
17915 FieldUnits (individual Field names within a Field definition) were
17916 not resolved during the AML table load.
17918 Fields: Fixed a problem where forward references from a Field
17919 definition to the parent Operation Region definition were not
17920 resolved during the AML table load.
17922 Fields: Duplicate FieldUnit names within a scope are now detected
17923 during AML table load.
17925 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
17926 returned an incorrect name for the root node.
17928 Code and Data Size: Code and Data optimizations have permitted new
17929 feature development with an actual reduction in the library size.
17930 Current core subsystem library sizes are shown below. These are
17931 the code and data sizes for the acpica.lib produced by the
17932 Microsoft Visual C++ 6.0 compiler, and these values do not include
17933 any ACPI driver or OSPM code. The debug version of the code
17934 includes the debug output trace mechanism and has a larger code
17935 and data size. Note that these values will vary depending on the
17936 efficiency of the compiler and the compiler options used during
17939 Previous Release (10_18_01):
17940 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
17941 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
17944 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
17945 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
17949 Improved /proc processor output (Pavel Machek) Re-added
17950 MODULE_LICENSE("GPL") to all modules.
17952 3) ASL Compiler version X2030:
17954 Duplicate FieldUnit names within a scope are now detected and
17959 Programmer Reference updated to reflect OSL and address space
17960 handler interface changes described above.
17962 ----------------------------------------
17963 Summary of changes for this label: 10_18_01
17965 ACPI CA Core Subsystem:
17967 Fixed a problem with the internal object reference count mechanism
17968 that occasionally caused premature object deletion. This resolves
17969 all of the outstanding problem reports where an object is deleted
17970 in the middle of an interpreter evaluation. Although this problem
17971 only showed up in rather obscure cases, the solution to the
17972 problem involved an adjustment of all reference counts involving
17973 objects attached to namespace nodes.
17975 Fixed a problem with Field support in the interpreter where
17976 writing to an aligned field whose length is an exact multiple (2
17977 or greater) of the field access granularity would cause an attempt
17978 to write beyond the end of the field.
17980 The top level AML opcode execution functions within the
17981 interpreter have been renamed with a more meaningful and
17982 consistent naming convention. The modules exmonad.c and
17983 exdyadic.c were eliminated. New modules are exoparg1.c,
17984 exoparg2.c, exoparg3.c, and exoparg6.c.
17986 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
17988 Fixed a problem where the AML debugger was causing some internal
17989 objects to not be deleted during subsystem termination.
17991 Fixed a problem with the external AcpiEvaluateObject interface
17992 where the subsystem would fault if the named object to be
17993 evaluated referred to a constant such as Zero, Ones, etc.
17995 Fixed a problem with IndexFields and BankFields where the
17996 subsystem would fault if the index, data, or bank registers were
17997 not defined in the same scope as the field itself.
17999 Added printf format string checking for compilers that support
18000 this feature. Corrected more than 50 instances of issues with
18001 format specifiers within invocations of ACPI_DEBUG_PRINT
18002 throughout the core subsystem code.
18004 The ASL "Revision" operator now returns the ACPI support level
18005 implemented in the core - the value "2" since the ACPI 2.0 support
18006 is more than 50% implemented.
18008 Enhanced the output of the AML debugger "dump namespace" command
18009 to output in a more human-readable form.
18011 Current core subsystem library code sizes are shown below. These
18013 are the code and data sizes for the acpica.lib produced by the
18014 Microsoft Visual C++ 6.0 compiler, and these values do not include
18015 any ACPI driver or OSPM code. The debug version of the code
18016 includes the full debug trace mechanism -- leading to a much
18018 larger code and data size. Note that these values will vary
18019 depending on the efficiency of the compiler and the compiler
18020 options used during generation.
18022 Previous Label (09_20_01):
18023 Non-Debug Version: 65K Code, 5K Data, 70K Total
18024 Debug Version: 138K Code, 58K Data, 196K Total
18028 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
18029 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
18033 Implemented a "Bad BIOS Blacklist" to track machines that have
18034 known ASL/AML problems.
18036 Enhanced the /proc interface for the thermal zone driver and added
18037 support for _HOT (the critical suspend trip point). The 'info'
18038 file now includes threshold/policy information, and allows setting
18039 of _SCP (cooling preference) and _TZP (polling frequency) values
18040 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
18041 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
18042 preference to the passive/quiet mode (if supported by the ASL).
18044 Implemented a workaround for a gcc bug that resuted in an OOPs
18045 when loading the control method battery driver.
18047 ----------------------------------------
18048 Summary of changes for this label: 09_20_01
18050 ACPI CA Core Subsystem:
18052 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
18053 modified to allow individual GPE levels to be flagged as wake-
18054 enabled (i.e., these GPEs are to remain enabled when the platform
18057 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
18058 support wake-enabled GPEs. This means that upon entering the
18059 sleep state, all GPEs that are not wake-enabled are disabled.
18060 When leaving the sleep state, these GPEs are re-enabled.
18062 A local double-precision divide/modulo module has been added to
18063 enhance portability to OS kernels where a 64-bit math library is
18064 not available. The new module is "utmath.c".
18066 Several optimizations have been made to reduce the use of CPU
18067 stack. Originally over 2K, the maximum stack usage is now below
18068 2K at 1860 bytes (1.82k)
18070 Fixed a problem with the AcpiGetFirmwareTable interface where the
18071 root table pointer was not mapped into a logical address properly.
18073 Fixed a problem where a NULL pointer was being dereferenced in the
18074 interpreter code for the ASL Notify operator.
18076 Fixed a problem where the use of the ASL Revision operator
18077 returned an error. This operator now returns the current version
18078 of the ACPI CA core subsystem.
18080 Fixed a problem where objects passed as control method parameters
18081 to AcpiEvaluateObject were always deleted at method termination.
18082 However, these objects may end up being stored into the namespace
18083 by the called method. The object reference count mechanism was
18084 applied to these objects instead of a force delete.
18086 Fixed a problem where static strings or buffers (contained in the
18087 AML code) that are declared as package elements within the ASL
18088 code could cause a fault because the interpreter would attempt to
18089 delete them. These objects are now marked with the "static
18090 object" flag to prevent any attempt to delete them.
18092 Implemented an interpreter optimization to use operands directly
18093 from the state object instead of extracting the operands to local
18094 variables. This reduces stack use and code size, and improves
18097 The module exxface.c was eliminated as it was an unnecessary extra
18100 Current core subsystem library code sizes are shown below. These
18101 are the code and data sizes for the acpica.lib produced by the
18102 Microsoft Visual C++ 6.0 compiler, and these values do not include
18103 any ACPI driver or OSPM code. The debug version of the code
18104 includes the full debug trace mechanism -- leading to a much
18105 larger code and data size. Note that these values will vary
18106 depending on the efficiency of the compiler and the compiler
18107 options used during generation.
18109 Non-Debug Version: 65K Code, 5K Data, 70K Total
18110 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
18111 Total (Previously 195K)
18115 Support for ACPI 2.0 64-bit integers has been added. All ACPI
18116 Integer objects are now 64 bits wide
18118 All Acpi data types and structures are now in lower case. Only
18119 Acpi macros are upper case for differentiation.
18123 Changes to the external interfaces as described above.
18125 ----------------------------------------
18126 Summary of changes for this label: 08_31_01
18128 ACPI CA Core Subsystem:
18130 A bug with interpreter implementation of the ASL Divide operator
18131 was found and fixed. The implicit function return value (not the
18132 explicit store operands) was returning the remainder instead of
18133 the quotient. This was a longstanding bug and it fixes several
18134 known outstanding issues on various platforms.
18136 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
18137 been further optimized for size. There are 700 invocations of the
18138 DEBUG_PRINT macro alone, so each optimization reduces the size of
18139 the debug version of the subsystem significantly.
18141 A stack trace mechanism has been implemented. The maximum stack
18142 usage is about 2K on 32-bit platforms. The debugger command "stat
18143 stack" will display the current maximum stack usage.
18145 All public symbols and global variables within the subsystem are
18146 now prefixed with the string "Acpi". This keeps all of the
18147 symbols grouped together in a kernel map, and avoids conflicts
18148 with other kernel subsystems.
18150 Most of the internal fixed lookup tables have been moved into the
18151 code segment via the const operator.
18153 Several enhancements have been made to the interpreter to both
18154 reduce the code size and improve performance.
18156 Current core subsystem library code sizes are shown below. These
18157 are the code and data sizes for the acpica.lib produced by the
18158 Microsoft Visual C++ 6.0 compiler, and these values do not include
18159 any ACPI driver or OSPM code. The debug version of the code
18160 includes the full debug trace mechanism which contains over 700
18161 invocations of the DEBUG_PRINT macro, 500 function entry macro
18162 invocations, and over 900 function exit macro invocations --
18163 leading to a much larger code and data size. Note that these
18164 values will vary depending on the efficiency of the compiler and
18165 the compiler options used during generation.
18167 Non-Debug Version: 64K Code, 5K Data, 69K Total
18168 Debug Version: 137K Code, 58K Data, 195K Total
18172 Implemented wbinvd() macro, pending a kernel-wide definition.
18174 Fixed /proc/acpi/event to handle poll() and short reads.
18176 ASL Compiler, version X2026:
18178 Fixed a problem introduced in the previous label where the AML
18180 code emitted for package objects produced packages with zero
18183 ----------------------------------------
18184 Summary of changes for this label: 08_16_01
18186 ACPI CA Core Subsystem:
18188 The following ACPI 2.0 ASL operators have been implemented in the
18189 AML interpreter (These are already supported by the Intel ASL
18190 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
18191 ToBuffer. Support for 64-bit AML constants is implemented in the
18192 AML parser, debugger, and disassembler.
18194 The internal memory tracking mechanism (leak detection code) has
18195 been upgraded to reduce the memory overhead (a separate tracking
18196 block is no longer allocated for each memory allocation), and now
18197 supports all of the internal object caches.
18199 The data structures and code for the internal object caches have
18200 been coelesced and optimized so that there is a single cache and
18201 memory list data structure and a single group of functions that
18202 implement generic cache management. This has reduced the code
18203 size in both the debug and release versions of the subsystem.
18205 The DEBUG_PRINT macro(s) have been optimized for size and replaced
18206 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
18207 different, because it generates a single call to an internal
18208 function. This results in a savings of about 90 bytes per
18209 invocation, resulting in an overall code and data savings of about
18210 16% in the debug version of the subsystem.
18214 Fixed C3 disk corruption problems and re-enabled C3 on supporting
18217 Integrated low-level sleep code by Patrick Mochel.
18219 Further tweaked source code Linuxization.
18225 Support for ACPI 2.0 variable length packages is fixed/completed.
18227 Fixed a problem where the optional length parameter for the ACPI
18228 2.0 ToString operator.
18230 Fixed multiple extraneous error messages when a syntax error is
18231 detected within the declaration line of a control method.
18233 ----------------------------------------
18234 Summary of changes for this label: 07_17_01
18236 ACPI CA Core Subsystem:
18238 Added a new interface named AcpiGetFirmwareTable to obtain any
18239 ACPI table via the ACPI signature. The interface can be called at
18240 any time during kernel initialization, even before the kernel
18241 virtual memory manager is initialized and paging is enabled. This
18242 allows kernel subsystems to obtain ACPI tables very early, even
18243 before the ACPI CA subsystem is initialized.
18245 Fixed a problem where Fields defined with the AnyAcc attribute
18246 could be resolved to the incorrect address under the following
18247 conditions: 1) the field width is larger than 8 bits and 2) the
18248 parent operation region is not defined on a DWORD boundary.
18250 Fixed a problem where the interpreter is not being locked during
18251 namespace initialization (during execution of the _INI control
18252 methods), causing an error when an attempt is made to release it
18255 ACPI 2.0 support in the AML Interpreter has begun and will be
18256 ongoing throughout the rest of this year. In this label, The Mod
18257 operator is implemented.
18259 Added a new data type to contain full PCI addresses named
18260 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
18261 and Function values.
18265 Enhanced the Linux version of the source code to change most
18266 capitalized ACPI type names to lowercase. For example, all
18267 instances of ACPI_STATUS are changed to acpi_status. This will
18268 result in a large diff, but the change is strictly cosmetic and
18269 aligns the CA code closer to the Linux coding standard.
18273 The interfaces to the PCI configuration space have been changed to
18274 add the PCI Segment number and to split the single 32-bit combined
18275 DeviceFunction field into two 16-bit fields. This was
18276 accomplished by moving the four values that define an address in
18277 PCI configuration space (segment, bus, device, and function) to
18278 the new ACPI_PCI_ID structure.
18280 The changes to the PCI configuration space interfaces led to a
18281 reexamination of the complete set of address space access
18282 interfaces for PCI, I/O, and Memory. The previously existing 18
18283 interfaces have proven difficult to maintain (any small change
18284 must be propagated across at least 6 interfaces) and do not easily
18285 allow for future expansion to 64 bits if necessary. Also, on some
18286 systems, it would not be appropriate to demultiplex the access
18287 width (8, 16, 32,or 64) before calling the OSL if the
18288 corresponding native OS interfaces contain a similar access width
18289 parameter. For these reasons, the 18 address space interfaces
18290 have been replaced by these 6 new ones:
18292 AcpiOsReadPciConfiguration
18293 AcpiOsWritePciConfiguration
18299 Added a new interface named AcpiOsGetRootPointer to allow the OSL
18300 to perform the platform and/or OS-specific actions necessary to
18301 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
18302 interface will simply call down to the CA core to perform the low-
18303 memory search for the table. On IA-64, the RSDP is obtained from
18304 EFI. Migrating this interface to the OSL allows the CA core to
18306 remain OS and platform independent.
18308 Added a new interface named AcpiOsSignal to provide a generic
18309 "function code and pointer" interface for various miscellaneous
18310 signals and notifications that must be made to the host OS. The
18311 first such signals are intended to support the ASL Fatal and
18312 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
18313 interface has been obsoleted.
18315 The definition of the AcpiFormatException interface has been
18316 changed to simplify its use. The caller no longer must supply a
18317 buffer to the call; A pointer to a const string is now returned
18318 directly. This allows the call to be easily used in printf
18319 statements, etc. since the caller does not have to manage a local
18323 ASL Compiler, Version X2025:
18325 The ACPI 2.0 Switch/Case/Default operators have been implemented
18326 and are fully functional. They will work with all ACPI 1.0
18327 interpreters, since the operators are simply translated to If/Else
18330 The ACPI 2.0 ElseIf operator is implemented and will also work
18331 with 1.0 interpreters, for the same reason.
18333 Implemented support for ACPI 2.0 variable-length packages. These
18334 packages have a separate opcode, and their size is determined by
18335 the interpreter at run-time.
18337 Documentation The ACPI CA Programmer Reference has been updated to
18338 reflect the new interfaces and changes to existing interfaces.
18340 ------------------------------------------
18341 Summary of changes for this label: 06_15_01
18343 ACPI CA Core Subsystem:
18345 Fixed a problem where a DWORD-accessed field within a Buffer
18346 object would get its byte address inadvertently rounded down to
18347 the nearest DWORD. Buffers are always Byte-accessible.
18349 ASL Compiler, version X2024:
18351 Fixed a problem where the Switch() operator would either fault or
18352 hang the compiler. Note however, that the AML code for this ACPI
18353 2.0 operator is not yet implemented.
18355 Compiler uses the new AcpiOsGetTimer interface to obtain compile
18358 Implementation of the CreateField operator automatically converts
18359 a reference to a named field within a resource descriptor from a
18360 byte offset to a bit offset if required.
18362 Added some missing named fields from the resource descriptor
18363 support. These are the names that are automatically created by the
18364 compiler to reference fields within a descriptor. They are only
18365 valid at compile time and are not passed through to the AML
18368 Resource descriptor named fields are now typed as Integers and
18369 subject to compile-time typechecking when used in expressions.
18371 ------------------------------------------
18372 Summary of changes for this label: 05_18_01
18374 ACPI CA Core Subsystem:
18376 Fixed a couple of problems in the Field support code where bits
18377 from adjacent fields could be returned along with the proper field
18378 bits. Restructured the field support code to improve performance,
18379 readability and maintainability.
18381 New DEBUG_PRINTP macro automatically inserts the procedure name
18382 into the output, saving hundreds of copies of procedure name
18383 strings within the source, shrinking the memory footprint of the
18384 debug version of the core subsystem.
18386 Source Code Structure:
18388 The source code directory tree was restructured to reflect the
18389 current organization of the component architecture. Some files
18390 and directories have been moved and/or renamed.
18394 Fixed leaking kacpidpc processes.
18396 Fixed queueing event data even when /proc/acpi/event is not
18399 ASL Compiler, version X2020:
18401 Memory allocation performance enhancement - over 24X compile time
18402 improvement on large ASL files. Parse nodes and namestring
18403 buffers are now allocated from a large internal compiler buffer.
18405 The temporary .SRC file is deleted unless the "-s" option is
18408 The "-d" debug output option now sends all output to the .DBG file
18409 instead of the console.
18411 "External" second parameter is now optional
18413 "ElseIf" syntax now properly allows the predicate
18415 Last operand to "Load" now recognized as a Target operand
18417 Debug object can now be used anywhere as a normal object.
18419 ResourceTemplate now returns an object of type BUFFER
18421 EISAID now returns an object of type INTEGER
18423 "Index" now works with a STRING operand
18425 "LoadTable" now accepts optional parameters
18427 "ToString" length parameter is now optional
18429 "Interrupt (ResourceType," parse error fixed.
18431 "Register" with a user-defined region space parse error fixed
18433 Escaped backslash at the end of a string ("\\") scan/parse error
18436 "Revision" is now an object of type INTEGER.
18440 ------------------------------------------
18441 Summary of changes for this label: 05_02_01
18445 /proc/acpi/event now blocks properly.
18447 Removed /proc/sys/acpi. You can still dump your DSDT from
18450 ACPI CA Core Subsystem:
18452 Fixed a problem introduced in the previous label where some of the
18453 "small" resource descriptor types were not recognized.
18455 Improved error messages for the case where an ASL Field is outside
18456 the range of the parent operation region.
18458 ASL Compiler, version X2018:
18461 Added error detection for ASL Fields that extend beyond the length
18462 of the parent operation region (only if the length of the region
18463 is known at compile time.) This includes fields that have a
18464 minimum access width that is smaller than the parent region, and
18465 individual field units that are partially or entirely beyond the
18466 extent of the parent.
18470 ------------------------------------------
18471 Summary of changes for this label: 04_27_01
18473 ACPI CA Core Subsystem:
18475 Fixed a problem where the namespace mutex could be released at the
18476 wrong time during execution of AcpiRemoveAddressSpaceHandler.
18478 Added optional thread ID output for debug traces, to simplify
18479 debugging of multiple threads. Added context switch notification
18480 when the debug code realizes that a different thread is now
18481 executing ACPI code.
18483 Some additional external data types have been prefixed with the
18484 string "ACPI_" for consistency. This may effect existing code.
18485 The data types affected are the external callback typedefs - e.g.,
18487 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
18491 Fixed an issue with the OSL semaphore implementation where a
18492 thread was waking up with an error from receiving a SIGCHLD
18495 Linux version of ACPI CA now uses the system C library for string
18496 manipulation routines instead of a local implementation.
18498 Cleaned up comments and removed TBDs.
18500 ASL Compiler, version X2017:
18502 Enhanced error detection and reporting for all file I/O
18507 Programmer Reference updated to version 1.06.
18511 ------------------------------------------
18512 Summary of changes for this label: 04_13_01
18514 ACPI CA Core Subsystem:
18516 Restructured support for BufferFields and RegionFields.
18517 BankFields support is now fully operational. All known 32-bit
18518 limitations on field sizes have been removed. Both BufferFields
18519 and (Operation) RegionFields are now supported by the same field
18522 Resource support now supports QWORD address and IO resources. The
18523 16/32/64 bit address structures and the Extended IRQ structure
18524 have been changed to properly handle Source Resource strings.
18526 A ThreadId of -1 is now used to indicate a "mutex not acquired"
18527 condition internally and must never be returned by AcpiOsThreadId.
18528 This reserved value was changed from 0 since Unix systems allow a
18533 Driver code reorganized to enhance portability
18535 Added a kernel configuration option to control ACPI_DEBUG
18537 Fixed the EC driver to honor _GLK.
18539 ASL Compiler, version X2016:
18541 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
18542 address space was set to 0, not 0x7f as it should be.
18544 ------------------------------------------
18545 Summary of changes for this label: 03_13_01
18547 ACPI CA Core Subsystem:
18549 During ACPI initialization, the _SB_._INI method is now run if
18552 Notify handler fix - notifies are deferred until the parent method
18553 completes execution. This fixes the "mutex already acquired"
18554 issue seen occasionally.
18556 Part of the "implicit conversion" rules in ACPI 2.0 have been
18557 found to cause compatibility problems with existing ASL/AML. The
18558 convert "result-to-target-type" implementation has been removed
18559 for stores to method Args and Locals. Source operand conversion
18560 is still fully implemented. Possible changes to ACPI 2.0
18561 specification pending.
18563 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
18566 Fix for compiler warnings for 64-bit compiles.
18570 /proc output aligned for easier parsing.
18572 Release-version compile problem fixed.
18574 New kernel configuration options documented in Configure.help.
18576 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
18581 Power resource driver integrated with bus manager.
18583 Fixed kernel fault during active cooling for thermal zones.
18587 The source code tree has been restructured.
18591 ------------------------------------------
18592 Summary of changes for this label: 03_02_01
18594 Linux OS Services Layer (OSL):
18596 Major revision of all Linux-specific code.
18598 Modularized all ACPI-specific drivers.
18600 Added new thermal zone and power resource drivers.
18602 Revamped /proc interface (new functionality is under /proc/acpi).
18604 New kernel configuration options.
18606 Linux known issues:
18608 New kernel configuration options not documented in Configure.help
18612 Module dependencies not currently implemented. If used, they
18613 should be loaded in this order: busmgr, power, ec, system,
18614 processor, battery, ac_adapter, button, thermal.
18616 Modules will not load if CONFIG_MODVERSION is set.
18618 IBM 600E - entering S5 may reboot instead of shutting down.
18620 IBM 600E - Sleep button may generate "Invalid <NULL> context"
18623 Some systems may fail with "execution mutex already acquired"
18626 ACPI CA Core Subsystem:
18628 Added a new OSL Interface, AcpiOsGetThreadId. This was required
18629 for the deadlock detection code. Defined to return a non-zero, 32-
18630 bit thread ID for the currently executing thread. May be a non-
18631 zero constant integer on single-thread systems.
18633 Implemented deadlock detection for internal subsystem mutexes. We
18634 may add conditional compilation for this code (debug only) later.
18636 ASL/AML Mutex object semantics are now fully supported. This
18637 includes multiple acquires/releases by owner and support for the
18639 Mutex SyncLevel parameter.
18641 A new "Force Release" mechanism automatically frees all ASL
18642 Mutexes that have been acquired but not released when a thread
18643 exits the interpreter. This forces conformance to the ACPI spec
18644 ("All mutexes must be released when an invocation exits") and
18645 prevents deadlocked ASL threads. This mechanism can be expanded
18646 (later) to monitor other resource acquisitions if OEM ASL code
18647 continues to misbehave (which it will).
18649 Several new ACPI exception codes have been added for the Mutex
18652 Recursive method calls are now allowed and supported (the ACPI
18653 spec does in fact allow recursive method calls.) The number of
18654 recursive calls is subject to the restrictions imposed by the
18655 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
18658 Implemented support for the SyncLevel parameter for control
18659 methods (ACPI 2.0 feature)
18661 Fixed a deadlock problem when multiple threads attempted to use
18664 Fixed a problem where the string length of a String package
18665 element was not always set in a package returned from
18666 AcpiEvaluateObject.
18668 Fixed a problem where the length of a String package element was
18669 not always included in the length of the overall package returned
18670 from AcpiEvaluateObject.
18672 Added external interfaces (Acpi*) to the ACPI debug memory
18673 manager. This manager keeps a list of all outstanding
18674 allocations, and can therefore detect memory leaks and attempts to
18675 free memory blocks more than once. Useful for code such as the
18676 power manager, etc. May not be appropriate for device drivers.
18677 Performance with the debug code enabled is slow.
18679 The ACPI Global Lock is now an optional hardware element.
18681 ASL Compiler Version X2015:
18683 Integrated changes to allow the compiler to be generated on
18684 multiple platforms.
18686 Linux makefile added to generate the compiler on Linux
18690 All platform-specific headers have been moved to their own
18691 subdirectory, Include/Platform.
18693 New source file added, Interpreter/ammutex.c
18695 New header file, Include/acstruct.h
18699 The programmer reference has been updated for the following new
18700 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
18702 ------------------------------------------
18703 Summary of changes for this label: 02_08_01
18705 Core ACPI CA Subsystem: Fixed a problem where an error was
18706 incorrectly returned if the return resource buffer was larger than
18707 the actual data (in the resource interfaces).
18709 References to named objects within packages are resolved to the
18711 full pathname string before packages are returned directly (via
18712 the AcpiEvaluateObject interface) or indirectly via the resource
18715 Linux OS Services Layer (OSL):
18717 Improved /proc battery interface.
18720 Added C-state debugging output and other miscellaneous fixes.
18722 ASL Compiler Version X2014:
18724 All defined method arguments can now be used as local variables,
18725 including the ones that are not actually passed in as parameters.
18726 The compiler tracks initialization of the arguments and issues an
18727 exception if they are used without prior assignment (just like
18730 The -o option now specifies a filename prefix that is used for all
18731 output files, including the AML output file. Otherwise, the
18732 default behavior is as follows: 1) the AML goes to the file
18733 specified in the DSDT. 2) all other output files use the input
18734 source filename as the base.
18736 ------------------------------------------
18737 Summary of changes for this label: 01_25_01
18739 Core ACPI CA Subsystem: Restructured the implementation of object
18740 store support within the interpreter. This includes support for
18741 the Store operator as well as any ASL operators that include a
18744 Partially implemented support for Implicit Result-to-Target
18745 conversion. This is when a result object is converted on the fly
18746 to the type of an existing target object. Completion of this
18747 support is pending further analysis of the ACPI specification
18748 concerning this matter.
18750 CPU-specific code has been removed from the subsystem (hardware
18753 New Power Management Timer functions added
18755 Linux OS Services Layer (OSL): Moved system state transition code
18756 to the core, fixed it, and modified Linux OSL accordingly.
18758 Fixed C2 and C3 latency calculations.
18761 We no longer use the compilation date for the version message on
18762 initialization, but retrieve the version from AcpiGetSystemInfo().
18764 Incorporated for fix Sony VAIO machines.
18766 Documentation: The Programmer Reference has been updated and
18770 ASL Compiler: Version X2013: Fixed a problem where the line
18771 numbering and error reporting could get out of sync in the
18772 presence of multiple include files.
18774 ------------------------------------------
18775 Summary of changes for this label: 01_15_01
18777 Core ACPI CA Subsystem:
18779 Implemented support for type conversions in the execution of the
18780 ASL Concatenate operator (The second operand is converted to
18781 match the type of the first operand before concatenation.)
18783 Support for implicit source operand conversion is partially
18784 implemented. The ASL source operand types Integer, Buffer, and
18785 String are freely interchangeable for most ASL operators and are
18786 converted by the interpreter on the fly as required. Implicit
18787 Target operand conversion (where the result is converted to the
18788 target type before storing) is not yet implemented.
18790 Support for 32-bit and 64-bit BCD integers is implemented.
18792 Problem fixed where a field read on an aligned field could cause a
18793 read past the end of the field.
18795 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
18796 does not return a value, but the caller expects one. (The ASL
18797 compiler flags this as a warning.)
18802 1. Static typechecking of all operands is implemented. This
18803 prevents the use of invalid objects (such as using a Package where
18804 an Integer is required) at compile time instead of at interpreter
18806 2. The ASL source line is printed with ALL errors and warnings.
18807 3. Bug fix for source EOF without final linefeed.
18808 4. Debug option is split into a parse trace and a namespace trace.
18809 5. Namespace output option (-n) includes initial values for
18810 integers and strings.
18811 6. Parse-only option added for quick syntax checking.
18812 7. Compiler checks for duplicate ACPI name declarations
18815 1. Relaxed typechecking to allow interchangeability between
18816 strings, integers, and buffers. These types are now converted by
18817 the interpreter at runtime.
18818 2. Compiler reports time taken by each internal subsystem in the
18822 ------------------------------------------
18823 Summary of changes for this label: 12_14_00
18827 This is the first official release of the compiler. Since the
18828 compiler requires elements of the Core Subsystem, this label
18829 synchronizes everything.
18831 ------------------------------------------
18832 Summary of changes for this label: 12_08_00
18835 Fixed a problem where named references within the ASL definition
18836 of both OperationRegions and CreateXXXFields did not work
18837 properly. The symptom was an AE_AML_OPERAND_TYPE during
18838 initialization of the region/field. This is similar (but not
18839 related internally) to the problem that was fixed in the last
18842 Implemented both 32-bit and 64-bit support for the BCD ASL
18843 functions ToBCD and FromBCD.
18845 Updated all legal headers to include "2000" in the copyright
18848 ------------------------------------------
18849 Summary of changes for this label: 12_01_00
18851 Fixed a problem where method invocations within the ASL definition
18852 of both OperationRegions and CreateXXXFields did not work
18853 properly. The symptom was an AE_AML_OPERAND_TYPE during
18854 initialization of the region/field:
18856 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
18857 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
18860 Fixed a problem where operators with more than one nested
18861 subexpression would fail. The symptoms were varied, by mostly
18862 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
18863 problem that has gone unnoticed until now.
18865 Subtract (Add (1,2), Multiply (3,4))
18867 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
18868 previous build (The prefix part of a relative path was handled
18871 Fixed a problem where Operation Region initialization failed if
18872 the operation region name was a "namepath" instead of a simple
18873 "nameseg". Symptom was an AE_NO_OPERAND error.
18875 Fixed a problem where an assignment to a local variable via the
18876 indirect RefOf mechanism only worked for the first such
18877 assignment. Subsequent assignments were ignored.
18879 ------------------------------------------
18880 Summary of changes for this label: 11_15_00
18882 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
18883 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
18884 the AML interpreter does NOT have support for the new 2.0 ASL
18885 grammar terms at this time.
18887 All ACPI hardware access is via the GAS structures in the ACPI 2.0
18890 All physical memory addresses across all platforms are now 64 bits
18891 wide. Logical address width remains dependent on the platform
18894 AcpiOsMapMemory interface changed to a 64-bit physical address.
18896 The AML interpreter integer size is now 64 bits, as per the ACPI
18899 For backwards compatibility with ACPI 1.0, ACPI tables with a
18900 revision number less than 2 use 32-bit integers only.
18902 Fixed a problem where the evaluation of OpRegion operands did not
18903 always resolve them to numbers properly.
18905 ------------------------------------------
18906 Summary of changes for this label: 10_20_00
18908 Fix for CBN_._STA issue. This fix will allow correct access to
18909 CBN_ OpRegions when the _STA returns 0x8.
18911 Support to convert ACPI constants (Ones, Zeros, One) to actual
18912 values before a package object is returned
18914 Fix for method call as predicate to if/while construct causing
18915 incorrect if/while behavior
18917 Fix for Else block package lengths sometimes calculated wrong (if
18920 Fix for Processor object length field, was always zero
18922 Table load abort if FACP sanity check fails
18924 Fix for problem with Scope(name) if name already exists
18926 Warning emitted if a named object referenced cannot be found
18927 (resolved) during method execution.
18933 ------------------------------------------
18934 Summary of changes for this label: 9_29_00
18936 New table initialization interfaces: AcpiInitializeSubsystem no
18937 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
18938 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
18939 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
18942 Note: These interface changes require changes to all existing OSDs
18944 The PCI_Config default address space handler is always installed
18945 at the root namespace object.
18947 -------------------------------------------
18948 Summary of changes for this label: 09_15_00
18950 The new initialization architecture is implemented. New
18951 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
18952 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
18954 (Namespace is automatically loaded when a table is loaded)
18956 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
18957 52 bytes to 32 bytes. There is usually one of these for every
18958 namespace object, so the memory savings is significant.
18960 Implemented just-in-time evaluation of the CreateField operators.
18962 Bug fixes for IA-64 support have been integrated.
18964 Additional code review comments have been implemented
18966 The so-called "third pass parse" has been replaced by a final walk
18967 through the namespace to initialize all operation regions (address
18968 spaces) and fields that have not yet been initialized during the
18969 execution of the various _INI and REG methods.
18971 New file - namespace/nsinit.c
18973 -------------------------------------------
18974 Summary of changes for this label: 09_01_00
18976 Namespace manager data structures have been reworked to change the
18977 primary object from a table to a single object. This has
18978 resulted in dynamic memory savings of 3X within the namespace and
18979 2X overall in the ACPI CA subsystem.
18981 Fixed problem where the call to AcpiEvFindPciRootBuses was
18982 inadvertently left commented out.
18984 Reduced the warning count when generating the source with the GCC
18987 Revision numbers added to each module header showing the
18988 SourceSafe version of the file. Please refer to this version
18989 number when giving us feedback or comments on individual modules.
18991 The main object types within the subsystem have been renamed to
18992 clarify their purpose:
18994 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
18995 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
18996 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
18998 NOTE: no changes to the initialization sequence are included in
19001 -------------------------------------------
19002 Summary of changes for this label: 08_23_00
19004 Fixed problem where TerminateControlMethod was being called
19005 multiple times per method
19007 Fixed debugger problem where single stepping caused a semaphore to
19010 Improved performance through additional parse object caching -
19011 added ACPI_EXTENDED_OP type
19013 -------------------------------------------
19014 Summary of changes for this label: 08_10_00
19016 Parser/Interpreter integration: Eliminated the creation of
19017 complete parse trees for ACPI tables and control methods.
19018 Instead, parse subtrees are created and then deleted as soon as
19019 they are processed (Either entered into the namespace or executed
19020 by the interpreter). This reduces the use of dynamic kernel
19021 memory significantly. (about 10X)
19023 Exception codes broken into classes and renumbered. Be sure to
19024 recompile all code that includes acexcep.h. Hopefully we won't
19025 have to renumber the codes again now that they are split into
19026 classes (environment, programmer, AML code, ACPI table, and
19029 Fixed some additional alignment issues in the Resource Manager
19032 Implemented semaphore tracking in the AcpiExec utility, and fixed
19033 several places where mutexes/semaphores were being unlocked
19034 without a corresponding lock operation. There are no known
19035 semaphore or mutex "leaks" at this time.
19037 Fixed the case where an ASL Return operator is used to return an
19040 -------------------------------------------
19041 Summary of changes for this label: 07_28_00
19043 Fixed a problem with the way addresses were calculated in
19044 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
19045 manifested itself when a Field was created with WordAccess or
19046 DwordAccess, but the field unit defined within the Field was less
19048 than a Word or Dword.
19050 Fixed a problem in AmlDumpOperands() module's loop to pull
19051 operands off of the operand stack to display information. The
19052 problem manifested itself as a TLB error on 64-bit systems when
19053 accessing an operand stack with two or more operands.
19055 Fixed a problem with the PCI configuration space handlers where
19056 context was getting confused between accesses. This required a
19057 change to the generic address space handler and address space
19058 setup definitions. Handlers now get both a global handler context
19059 (this is the one passed in by the user when executing
19060 AcpiInstallAddressSpaceHandler() and a specific region context
19061 that is unique to each region (For example, the _ADR, _SEG and
19062 _BBN values associated with a specific region). The generic
19063 function definitions have changed to the following:
19065 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
19066 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
19067 *HandlerContext, // This used to be void *Context void
19068 *RegionContext); // This is an additional parameter
19070 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
19071 RegionHandle, UINT32 Function, void *HandlerContext, void
19072 **RegionContext); // This used to be **ReturnContext
19074 -------------------------------------------
19075 Summary of changes for this label: 07_21_00
19077 Major file consolidation and rename. All files within the
19078 interpreter have been renamed as well as most header files. This
19079 was done to prevent collisions with existing files in the host
19080 OSs -- filenames such as "config.h" and "global.h" seem to be
19081 quite common. The VC project files have been updated. All
19082 makefiles will require modification.
19084 The parser/interpreter integration continues in Phase 5 with the
19085 implementation of a complete 2-pass parse (the AML is parsed
19086 twice) for each table; This avoids the construction of a huge
19087 parse tree and therefore reduces the amount of dynamic memory
19088 required by the subsystem. Greater use of the parse object cache
19089 means that performance is unaffected.
19091 Many comments from the two code reviews have been rolled in.
19093 The 64-bit alignment support is complete.
19095 -------------------------------------------
19096 Summary of changes for this label: 06_30_00
19098 With a nod and a tip of the hat to the technology of yesteryear,
19099 we've added support in the source code for 80 column output
19100 devices. The code is now mostly constrained to 80 columns or
19101 less to support environments and editors that 1) cannot display
19102 or print more than 80 characters on a single line, and 2) cannot
19103 disable line wrapping.
19105 A major restructuring of the namespace data structure has been
19106 completed. The result is 1) cleaner and more
19107 understandable/maintainable code, and 2) a significant reduction
19108 in the dynamic memory requirement for each named ACPI object
19111 -------------------------------------------
19112 Summary of changes for this label: 06_23_00
19114 Linux support has been added. In order to obtain approval to get
19115 the ACPI CA subsystem into the Linux kernel, we've had to make
19116 quite a few changes to the base subsystem that will affect all
19117 users (all the changes are generic and OS- independent). The
19118 effects of these global changes have been somewhat far reaching.
19119 Files have been merged and/or renamed and interfaces have been
19120 renamed. The major changes are described below.
19122 Osd* interfaces renamed to AcpiOs* to eliminate namespace
19123 pollution/confusion within our target kernels. All OSD
19124 interfaces must be modified to match the new naming convention.
19126 Files merged across the subsystem. A number of the smaller source
19127 and header files have been merged to reduce the file count and
19128 increase the density of the existing files. There are too many
19129 to list here. In general, makefiles that call out individual
19130 files will require rebuilding.
19132 Interpreter files renamed. All interpreter files now have the
19133 prefix am* instead of ie* and is*.
19135 Header files renamed: The acapi.h file is now acpixf.h. The
19136 acpiosd.h file is now acpiosxf.h. We are removing references to
19137 the acronym "API" since it is somewhat windowsy. The new name is
19138 "external interface" or xface or xf in the filenames.j
19141 All manifest constants have been forced to upper case (some were
19142 mixed case.) Also, the string "ACPI_" has been prepended to many
19143 (not all) of the constants, typedefs, and structs.
19145 The globals "DebugLevel" and "DebugLayer" have been renamed
19146 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
19148 All other globals within the subsystem are now prefixed with
19149 "AcpiGbl_" Internal procedures within the subsystem are now
19150 prefixed with "Acpi" (with only a few exceptions). The original
19151 two-letter abbreviation for the subcomponent remains after "Acpi"
19152 - for example, CmCallocate became AcpiCmCallocate.
19154 Added a source code translation/conversion utility. Used to
19155 generate the Linux source code, it can be modified to generate
19156 other types of source as well. Can also be used to cleanup
19157 existing source by removing extraneous spaces and blank lines.
19158 Found in tools/acpisrc/*
19160 OsdUnMapMemory was renamed to OsdUnmapMemory and then
19161 AcpiOsUnmapMemory. (UnMap became Unmap).
19163 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
19164 When set to one, this indicates that the caller wants to use the
19166 semaphore as a mutex, not a counting semaphore. ACPI CA uses
19167 both types. However, implementers of this call may want to use
19168 different OS primitives depending on the type of semaphore
19169 requested. For example, some operating systems provide separate
19171 "mutex" and "semaphore" interfaces - where the mutex interface is
19172 much faster because it doesn't have all the overhead of a full
19173 semaphore implementation.
19175 Fixed a deadlock problem where a method that accesses the PCI
19176 address space can block forever if it is the first access to the
19179 -------------------------------------------
19180 Summary of changes for this label: 06_02_00
19182 Support for environments that cannot handle unaligned data
19183 accesses (e.g. firmware and OS environments devoid of alignment
19184 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
19185 been added (via configurable macros) in these three areas: -
19186 Transfer of data from the raw AML byte stream is done via byte
19187 moves instead of word/dword/qword moves. - External objects are
19188 aligned within the user buffer, including package elements (sub-
19189 objects). - Conversion of name strings to UINT32 Acpi Names is now
19192 The Store operator was modified to mimic Microsoft's
19193 implementation when storing to a Buffer Field.
19195 Added a check of the BM_STS bit before entering C3.
19197 The methods subdirectory has been obsoleted and removed. A new
19198 file, cmeval.c subsumes the functionality.
19200 A 16-bit (DOS) version of AcpiExec has been developed. The
19201 makefile is under the acpiexec directory.