1 ----------------------------------------
2 03 October 2018. Summary of changes for version 20181003:
5 2) iASL Compiler/Disassembler and Tools:
7 Fixed a regression introduced in version 20180927 that could cause the
8 compiler to fault, especially with NamePaths containing one or more
9 carats (^). Such as: ^^_SB_PCI0
11 Added a new remark for the Sleep() operator when the sleep time operand
12 is larger than one second. This is a very long time for the ASL/BIOS code
13 and may not be what was intended by the ASL writer.
15 ----------------------------------------
16 27 September 2018. Summary of changes for version 20180927:
19 1) ACPICA kernel-resident subsystem:
21 Updated the GPE support to clear the status of all ACPI events when
22 entering any/all sleep states in order to avoid premature wakeups. In
23 theory, this may cause some wakeup events to be missed, but the
24 likelihood of this is small. This change restores the original behavior
25 of the ACPICA code in order to fix a regression seen from the previous
26 "Stop unconditionally clearing ACPI IRQs during suspend/resume" change.
27 This regression could cause some systems to incorrectly wake immediately.
29 Updated the execution of the _REG methods during initialization and
30 namespace loading to bring the behavior into closer conformance to the
31 ACPI specification and other ACPI implementations:
33 From the ACPI specification 6.2A, section 6.5.4 "_REG (Region):
34 "Control methods must assume all operation regions are inaccessible
35 until the _REG(RegionSpace, 1) method is executed"
37 "The exceptions to this rule are:
38 1. OSPM must guarantee that the following operation regions are always
40 SystemIO operation regions.
41 SystemMemory operation regions when accessing memory returned by the
42 System Address Map reporting interfaces."
44 Since the state of both the SystemIO and SystemMemory address spaces are
45 defined by the specification to never change, this ACPICA change ensures
46 that now _REG is never called on them. This solves some problems seen in
47 the field and provides compatibility with other ACPI implementations. An
48 update to the upcoming new version of the ACPI specification will help
49 clarify this behavior.
51 Updated the implementation of support for the Generic Serial Bus. For the
52 "bidirectional" protocols, the internal implementation now automatically
53 creates a return data buffer of the maximum size (255). This handles the
54 worst-case for data that is returned from the serial bus handler, and
55 fixes some problems seen in the field. This new buffer is directly
56 returned to the ASL. As such, there is no true "bidirectional" buffer,
57 which matches the ACPI specification. This is the reason for the "double
58 store" seen in the example ASL code in the specification, shown below:
60 Word Process Call (AttribProcessCall):
61 OperationRegion(TOP1, GenericSerialBus, 0x00, 0x100)
62 Field(TOP1, BufferAcc, NoLock, Preserve)
64 FLD1, 8, // Virtual register at command value 1.
67 Name(BUFF, Buffer(20){}) // Create GenericSerialBus data buffer
69 CreateWordField(BUFF, 0x02, DATA) // DATA = Data (Word)
71 Store(0x5416, DATA) // Save 0x5416 into the data buffer
72 Store(Store(BUFF, FLD1), BUFF) // Invoke a write/read Process Call
74 // This is the "double store". The write to
75 // FLD1 returns a new buffer, which is stored
76 // back into BUFF with the second Store.
79 2) iASL Compiler/Disassembler and Tools:
81 iASL: Implemented detection of extraneous/redundant uses of the Offset()
82 operator within a Field Unit list. A remark is now issued for these. For
83 example, the first two of the Offset() operators below are extraneous.
84 Because both the compiler and the interpreter track the offsets
85 automatically, these Offsets simply refer to the current offset and are
86 unnecessary. Note, when optimization is enabled, the iASL compiler will
87 in fact remove the redundant Offset operators and will not emit any AML
90 OperationRegion (OPR1, SystemMemory, 0x100, 0x100)
93 Offset (0), // Never needed
95 Offset (4), // Redundant, offset is already 4 (bytes)
97 Offset (64), // OK use of Offset.
100 dsdt.asl 14: Offset (0),
101 Remark 2158 - ^ Unnecessary/redundant use of Offset
104 dsdt.asl 16: Offset (4),
105 Remark 2158 - ^ Unnecessary/redundant use of Offset
108 ----------------------------------------
109 10 August 2018. Summary of changes for version 20180810:
112 1) ACPICA kernel-resident subsystem:
114 Initial ACPI table loading: Attempt to continue loading ACPI tables
115 regardless of malformed AML. Since migrating table initialization to the
116 new module-level code support, the AML interpreter rejected tables upon
117 any ACPI error encountered during table load. This is a problem because
118 non-serious ACPI errors during table load do not necessarily mean that
119 the entire definition block (DSDT or SSDT) is invalid. This change
120 improves the table loading by ignoring some types of errors that can be
121 generated by incorrect AML. This can range from object type errors, scope
122 errors, and index errors.
124 Suspend/Resume support: Update to stop unconditionally clearing ACPI IRQs
125 during suspend/resume. The status of ACPI events is no longer cleared
126 when entering the ACPI S5 system state (power off) which caused some
127 systems to power up immediately after turning off power in certain
128 situations. This was a functional regression. It was fixed by clearing
129 the status of all ACPI events again when entering S5 (for system-wide
130 suspend or hibernation the clearing of the status of all events is not
131 desirable, as it might cause the kernel to miss wakeup events sometimes).
135 2) iASL Compiler/Disassembler and Tools:
137 AcpiExec: Enhanced the -fi option (Namespace initialization file). Field
138 elements listed in the initialization file were previously initialized
139 after the table load and before executing module-level code blocks.
140 Recent changes in the module-level code support means that the table load
141 becomes a large control method execution. If fields are used within
142 module-level code and we are executing with the -fi option, the
143 initialization values were used to initialize the namespace object(s)
144 only after the table was finished loading. This change Provides an early
145 initialization of objects specified in the initialization file so that
146 field unit values are populated during the table load (not after the
149 AcpiExec: Fixed a small memory leak regression that could result in
150 warnings during exit of the utility. These warnings were similar to
152 0002D690 Length 0x0006 nsnames-0502 [Not a Descriptor - too small]
153 0002CD70 Length 0x002C utcache-0453 [Operand] Integer RefCount 0x0001
155 ----------------------------------------
156 29 June 2018. Summary of changes for version 20180629:
159 1) iASL Compiler/Disassembler and Tools:
161 iASL: Fixed a regression related to the use of the ASL External
162 statement. Error checking for the use of the External() statement has
163 been relaxed. Previously, a restriction on the use of External meant that
164 the referenced named object was required to be defined in a different
165 table (an SSDT). Thus it would be an error to declare an object as an
166 external and then define the same named object in the same table. For
168 DefinitionBlock (...)
171 Device (DEV1){...} // This was an error
173 However, this behavior has caused regressions in some existing ASL code,
174 because there is code that depends on named objects and externals (with
175 the same name) being declared in the same table. This change will allow
176 the ASL code above to compile without errors or warnings.
178 iASL: Implemented ASL language extensions for four operators to make some
179 of their arguments optional instead of required:
180 1) Field (RegionName, AccessType, LockRule, UpdateRule)
181 2) BankField (RegionName, BankName, BankValue,
182 AccessType, LockRule, UpdateRule)
183 3) IndexField (IndexName, DataName,
184 AccessType, LockRule, UpdateRule)
185 For the Field operators above, the AccessType, LockRule, and UpdateRule
186 are now optional arguments. The default values are:
190 4) Mutex (MutexName, SyncLevel)
191 For this operator, the SyncLevel argument is now optional. This argument
192 is rarely used in any meaningful way by ASL code, and thus it makes sense
193 to make it optional. The default value is:
196 iASL: Attempted use of the ASL Unload() operator now results in the
198 "Unload is not supported by all operating systems"
199 This is in fact very true, and the Unload operator may be completely
200 deprecated in the near future.
202 AcpiExec: Fixed a regression for the -fi option (Namespace initialization
203 file. Recent changes in the ACPICA module-level code support altered the
204 table load/initialization sequence . This means that the table load has
205 become a large method execution of the table itself. If Operation Region
206 Fields are used within any module-level code and the -fi option was
207 specified, the initialization values were populated only after the table
208 had completely finished loading (and thus the module-level code had
209 already been executed). This change moves the initialization of objects
210 listed in the initialization file to before the table is executed as a
211 method. Field unit values are now initialized before the table execution
214 ----------------------------------------
215 31 May 2018. Summary of changes for version 20180531:
218 1) ACPICA kernel-resident Subsystem:
220 Implemented additional support to help ensure that a DSDT or SSDT is
221 fully loaded even if errors are incurred during the load. The majority of
222 the problems that are seen is the failure of individual AML operators
223 that occur during execution of any module-level code (MLC) existing in
224 the table. This support adds a mechanism to abort the current ASL
225 statement (AML opcode), emit an error message, and to simply move on to
226 the next opcode -- instead of aborting the entire table load. This is
227 different than the execution of a control method where the entire method
228 is aborted upon any error. The goal is to perform a very "best effort" to
229 load the ACPI tables. The most common MLC errors that have been seen in
230 the field are direct references to unresolved ASL/AML symbols (referenced
231 directly without the use of the CondRefOf operator to validate the
232 symbol). This new ACPICA behavior is now compatible with other ACPI
235 Interpreter: The Unload AML operator is no longer supported for the
236 reasons below. An AE_NOT_IMPLEMENTED exception is returned.
237 1) A correct implementation on at least some hosts may not be possible.
238 2) Other ACPI implementations do not correctly/fully support it.
239 3) It requires host device driver support which is not known to exist.
240 (To properly support namespace unload out from underneath.)
241 4) This AML operator has never been seen in the field.
243 Parser: Added a debug option to dump AML parse sub-trees as they are
244 being executed. Used with ACPI_DEBUG_PRINT, the enabling debug level is
247 Debugger: Reduced the verbosity for errors incurred during table load and
248 module-level code execution.
250 Completed an investigation into adding a namespace node "owner list"
251 instead of the current "owner ID" associated with namespace nodes. This
252 list would link together all nodes that are owned by an individual
253 control method. The purpose would be to enhance control method execution
254 by speeding up cleanup during method exit (all namespace nodes created by
255 a method are deleted upon method termination.) Currently, the entire
256 namespace must be searched for matching owner IDs if (and only if) the
257 method creates named objects outside of the local scope. However, by far
258 the most common case is that methods create objects locally, not outside
259 the method scope. There is already an ACPICA optimization in place that
260 only searches the entire namespace in the rare case of a method creating
261 objects elsewhere in the namespace. Therefore, it is felt that the
262 overhead of adding an additional pointer to each namespace node to
263 implement the owner list makes this feature unnecessary.
266 2) iASL Compiler/Disassembler and Tools:
268 iASL, Disassembler, and Template generator: Implemented support for
269 Revision D of the IORT table. Adds a new subtable that is used to specify
270 SMMUv3 PMCGs. rmurphy-arm.
272 Disassembler: Restored correct table header validation for the "special"
273 ACPI tables -- RSDP and FACS. These tables do not contain a standard ACPI
274 table header and must be special-cased. This was a regression that has
275 been present for apparently a long time.
277 AcpiExec: Reduced verbosity of the local exception handler implemented
278 within acpiexec. This handler is invoked by ACPICA upon any exceptions
279 generated during control method execution. A new option was added: -vh
280 restores the original verbosity level if desired.
282 AcpiExec: Changed the default base from decimal to hex for the -x option
283 (set debug level). This simplifies the use of this option and matches the
284 behavior of the corresponding iASL -x option.
286 AcpiExec: Restored a force-exit on multiple control-c (sigint)
287 interrupts. This allows program termination even if other issues cause
288 the control-c to fail.
290 ASL test suite (ASLTS): Added tests for the recently implemented package
291 element resolution mechanism that allows forward references to named
292 objects from individual package elements (this mechanism provides
293 compatibility with other ACPI implementations.)
296 ----------------------------------------
297 8 May 2018. Summary of changes for version 20180508:
300 1) ACPICA kernel-resident subsystem:
302 Completed the new (recently deployed) package resolution mechanism for
303 the Load and LoadTable ASL/AML operators. This fixes a regression that
304 was introduced in version 20180209 that could result in an
305 AE_AML_INTERNAL exception during the loading of a dynamic ACPI/AML table
306 (SSDT) that contains package objects.
309 2) iASL Compiler/Disassembler and Tools:
311 AcpiDump and AcpiXtract: Implemented support for ACPI tables larger than
312 1 MB. This change allows for table offsets within the acpidump file to be
313 up to 8 characters. These changes are backwards compatible with existing
317 ----------------------------------------
318 27 April 2018. Summary of changes for version 20180427:
321 1) ACPICA kernel-resident subsystem:
323 Debugger: Added support for Package objects in the "Test Objects"
324 command. This command walks the entire namespace and evaluates all named
325 data objects (Integers, Strings, Buffers, and now Packages).
327 Improved error messages for the namespace root node. Originally, the root
328 was referred to by the confusing string "\___". This has been replaced by
329 "Namespace Root" for clarification.
331 Fixed a potential infinite loop in the AcpiRsDumpByteList function. Colin
332 Ian King <colin.king@canonical.com>.
335 2) iASL Compiler/Disassembler and Tools:
337 iASL: Implemented support to detect and flag illegal forward references.
338 For compatibility with other ACPI implementations, these references are
339 now illegal at the root level of the DSDT or SSDTs. Forward references
340 have always been illegal within control methods. This change should not
341 affect existing ASL/AML code because of the fact that these references
342 have always been illegal in the other ACPI implementation.
344 iASL: Added error messages for the case where a table OEM ID and OEM
345 TABLE ID strings are longer than the ACPI-defined length. Previously,
346 these strings were simply silently truncated.
348 iASL: Enhanced the -tc option (which creates an AML hex file in C,
349 suitable for import into a firmware project):
350 1) Create a unique name for the table, to simplify use of multiple
352 2) Add a protection #ifdef in the file, similar to a .h header file.
353 With assistance from Sami Mujawar, sami.mujawar@arm.com and Evan Lloyd,
356 AcpiExec: Added a new option, -df, to disable the local fault handler.
357 This is useful during debugging, where it may be desired to drop into a
360 ----------------------------------------
361 13 March 2018. Summary of changes for version 20180313:
364 1) ACPICA kernel-resident subsystem:
366 Implemented various improvements to the GPE support:
368 1) Dispatch all active GPEs at initialization time so that no GPEs are
370 2) Enable runtime GPEs earlier. Some systems expect GPEs to be enabled
371 before devices are enumerated.
372 3) Don't unconditionally clear ACPI IRQs during suspend/resume, so that
374 4) Add parallel GPE handling to eliminate the possibility of dispatching
376 5) Dispatch any pending GPEs after enabling for the first time.
378 AcpiGetObjectInfo - removed support for the _STA method. This was causing
379 problems on some platforms.
381 Added a new _OSI string, "Windows 2017.2".
383 Cleaned up and simplified the module-level code support. These changes
384 are in preparation for the eventual removal of the legacy MLC support
385 (deferred execution), replaced by the new MLC architecture which executes
386 the MLC as a table is loaded (DSDT/SSDTs).
388 Changed a compile-time option to a runtime option. Changes the option to
389 ignore ACPI table load-time package resolution errors into a runtime
390 option. Used only for platforms that generate many AE_NOT_FOUND errors
391 during boot. AcpiGbl_IgnorePackageResolutionErrors.
393 Fixed the ACPI_ERROR_NAMESPACE macro. This change involves putting some
394 ACPI_ERROR_NAMESPACE parameters inside macros. By doing so, we avoid
395 compilation errors from unused variables (seen with some compilers).
398 2) iASL Compiler/Disassembler and Tools:
400 ASLTS: parallelized execution in order to achieve an (approximately) 2X
401 performance increase.
403 ASLTS: Updated to use the iASL __LINE__ and __METHOD__ macros. Improves
406 ----------------------------------------
407 09 February 2018. Summary of changes for version 20180209:
410 1) ACPICA kernel-resident subsystem:
412 Completed the final integration of the recent changes to Package Object
413 handling and the module-level AML code support. This allows forward
414 references from individual package elements when the package object is
415 declared from within module-level code blocks. Provides compatibility
416 with other ACPI implementations.
418 The new architecture for the AML module-level code has been completed and
419 is now the default for the ACPICA code. This new architecture executes
420 the module-level code in-line as the ACPI table is loaded/parsed instead
421 of the previous architecture which deferred this code until after the
422 table was fully loaded. This solves some ASL code ordering issues and
423 provides compatibility with other ACPI implementations. At this time,
424 there is an option to fallback to the earlier architecture, but this
425 support is deprecated and is planned to be completely removed later this
428 Added a compile-time option to ignore AE_NOT_FOUND exceptions during
429 resolution of named reference elements within Package objects. Although
430 this is potentially a serious problem, it can generate a lot of
431 noise/errors on platforms whose firmware carries around a bunch of unused
432 Package objects. To disable these errors, define
433 ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS in the OS-specific header. All
434 errors are always reported for ACPICA applications such as AcpiExec.
436 Fixed a regression related to the explicit type-conversion AML operators
437 (ToXXXX). The regression was introduced early in 2017 but was not seen
438 until recently because these operators are not fully supported by other
439 ACPI implementations and are thus rarely used by firmware developers. The
440 operators are defined by the ACPI specification to not implement the
441 "implicit result object conversion". The regression incorrectly
442 introduced this object conversion for the following explicit conversion
453 2) iASL Compiler/Disassembler and Tools:
455 iASL: Fixed a problem with the compiler constant folding feature as
456 related to the ToXXXX explicit conversion operators. These operators do
457 not support the "implicit result object conversion" by definition. Thus,
458 ASL expressions that use these operators cannot be folded to a simple
459 Store operator because Store implements the implicit conversion. This
460 change uses the CopyObject operator for the ToXXXX operator folding
461 instead. CopyObject is defined to not implement implicit result
462 conversions and is thus appropriate for folding the ToXXXX operators.
464 iASL: Changed the severity of an error condition to a simple warning for
465 the case where a symbol is declared both locally and as an external
466 symbol. This accommodates existing ASL code.
468 AcpiExec: The -ep option to enable the new architecture for module-level
469 code has been removed. It is replaced by the -dp option which instead has
470 the opposite effect: it disables the new architecture (the default) and
471 enables the legacy architecture. When the legacy code is removed in the
472 future, the -dp option will be removed also.
474 ----------------------------------------
475 05 January 2018. Summary of changes for version 20180105:
478 1) ACPICA kernel-resident subsystem:
480 Updated all copyrights to 2018. This affects all source code modules.
482 Fixed a possible build error caused by an unresolved reference to the
483 AcpiUtSafeStrncpy function.
485 Removed NULL pointer arithmetic in the various pointer manipulation
486 macros. All "(void *) NULL" constructs are converted to "(void *) 0".
487 This eliminates warnings/errors in newer C compilers. Jung-uk Kim.
489 Added support for A32 ABI compilation, which uses the ILP32 model. Anuj
493 2) iASL Compiler/Disassembler and Tools:
495 ASLTS: Updated all copyrights to 2018.
497 Tools: Updated all signon copyrights to 2018.
499 AcpiXtract: Fixed a regression related to ACPI table signatures where the
500 signature was truncated to 3 characters (instead of 4).
502 AcpiExec: Restore the original terminal mode after the use of the -v and
505 ASLTS: Deployed the iASL __METHOD__ macro across the test suite.
507 ----------------------------------------
508 14 December 2017. Summary of changes for version 20171214:
511 1) ACPICA kernel-resident subsystem:
513 Fixed a regression in the external (public) AcpiEvaluateObjectTyped
514 interface where the optional "pathname" argument had inadvertently become
515 a required argument returning an error if omitted (NULL pointer
518 Fixed two possible memory leaks related to the recently developed "late
519 resolution" of reference objects within ASL Package Object definitions.
521 Added two recently defined _OSI strings: "Windows 2016" and "Windows
522 2017". Mario Limonciello.
524 Implemented and deployed a safer version of the C library function
525 strncpy: AcpiUtSafeStrncpy. The intent is to at least prevent the
526 creation of unterminated strings as a possible result of a standard
529 Cleaned up and restructured the global variable file (acglobal.h). There
530 are many changes, but no functional changes.
533 2) iASL Compiler/Disassembler and Tools:
535 iASL Table Compiler: Fixed a problem with the DBG2 ACPI table where the
536 optional OemData field at the end of the table was incorrectly required
537 for proper compilation. It is now correctly an optional field.
539 ASLTS: The entire suite was converted from standard ASL to the ASL+
540 language, using the ASL-to-ASL+ converter which is integrated into the
541 iASL compiler. A binary compare of all output files has verified the
542 correctness of the conversion.
544 iASL: Fixed the source code build for platforms where "char" is unsigned.
545 This affected the iASL lexer only. Jung-uk Kim.
547 ----------------------------------------
548 10 November 2017. Summary of changes for version 20171110:
551 1) ACPICA kernel-resident subsystem:
553 This release implements full support for ACPI 6.2A:
554 NFIT - Added a new subtable, "Platform Capabilities Structure"
555 No other changes to ACPICA were required, since ACPI 6.2A is primarily an
556 errata release of the specification.
558 Other ACPI table changes:
559 IORT: Added the SMMUv3 Device ID mapping index. Hanjun Guo
560 PPTT: Added cache attribute flag definitions to actbl1.h. Jeremy
563 Utilities: Modified the string/integer conversion functions to use
564 internal 64-bit divide support instead of a native divide. On 32-bit
565 platforms, a 64-bit divide typically requires a library function which
566 may not be present in the build (kernel or otherwise).
568 Implemented a targeted error message for timeouts returned from the
569 Embedded Controller device driver. This is seen frequently enough to
570 special-case an AE_TIME returned from an EC operation region access:
571 "Timeout from EC hardware or EC device driver"
573 Changed the "ACPI Exception" message prefix to "ACPI Error" so that all
574 runtime error messages have the identical prefix.
577 2) iASL Compiler/Disassembler and Tools:
579 AcpiXtract: Fixed a problem with table header detection within the
580 acpidump file. Processing a table could be ended early if a 0x40 (@)
581 appears in the original binary table, resulting in the @ symbol appearing
582 in the decoded ASCII field at the end of the acpidump text line. The
583 symbol caused acpixtract to incorrectly think it had reached the end of
584 the current table and the beginning of a new table.
586 AcpiXtract: Added an option (-f) to ignore some errors during table
587 extraction. This initial implementation ignores non-ASCII and non-
588 printable characters found in the acpidump text file.
590 TestSuite(ASLTS)/AcpiExec: Fixed and restored the memory usage statistics
591 for ASLTS. This feature is used to track memory allocations from
592 different memory caches within the ACPICA code. At the end of an ASLTS
593 run, these memory statistics are recorded and stored in a log file.
595 Debugger (user-space version): Implemented a simple "Background" command.
596 Creates a new thread to execute a control method in the background, while
597 control returns to the debugger prompt to allow additional commands.
598 Syntax: Background <Namepath> [Arguments]
600 ----------------------------------------
601 29 September 2017. Summary of changes for version 20170929:
604 1) ACPICA kernel-resident subsystem:
606 Redesigned and implemented an improved ASL While() loop timeout
607 mechanism. This mechanism is used to prevent infinite loops in the kernel
608 AML interpreter caused by either non-responsive hardware or incorrect AML
609 code. The new implementation uses AcpiOsGetTimer instead of a simple
610 maximum loop count, and is thus more accurate and constant across
611 different machines. The default timeout is currently 30 seconds, but this
612 may be adjusted later.
614 Renamed the ACPI_AML_INFINITE_LOOP exception to AE_AML_LOOP_TIMEOUT to
615 better reflect the new implementation of the loop timeout mechanism.
617 Updated the AcpiGetTimerDuration interface to cleanup the 64-bit support
618 and to fix an off-by-one error. Jung-uk Kim.
620 Fixed an EFI build problem by updating the makefiles to for a new file
621 that was added, utstrsuppt.c
624 2) iASL Compiler/Disassembler and Tools:
626 Implemented full support for the PDTT, SDEV, and TPM2 ACPI tables. This
627 includes support in the table disassembler, compiler, and template
630 iASL: Added an exception for an illegal type of recursive method
631 invocation. If a method creates named objects, the first recursive call
632 will fail at runtime. This change adds an error detection at compile time
633 to catch the problem up front. Note: Marking such a method as
634 "serialized" will not help with this problem, because the same thread can
635 acquire the method mutex more than once. Example compiler and runtime
645 Error 6152 - ^ Illegal recursive call to method
646 that creates named objects (MTH1)
648 Previous runtime exception:
649 ACPI Error: [INT1] Namespace lookup failure,
650 AE_ALREADY_EXISTS (20170831/dswload2-465)
652 iASL: Updated support for External() opcodes to improve namespace
653 management and error detection. These changes are related to issues seen
654 with multiple-segment namespace pathnames within External declarations,
657 External(\_SB.PCI0.GFX0, DeviceObj)
658 External(\_SB.PCI0.GFX0.ALSI)
660 iASL: Implemented support for multi-line error/warning messages. This
661 enables more detailed and helpful error messages as below, from the
662 initial deployment for the duplicate names error:
664 DSDT.iiii 1692: Device(PEG2) {
665 Error 6074 - ^ Name already exists in scope
668 Original name creation/declaration below:
669 DSDT.iiii 93: External(\_SB.PCI0.PEG2, DeviceObj)
671 AcpiXtract: Added additional flexibility to support differing input hex
672 dump formats. Specifically, hex dumps that contain partial disassembly
673 and/or comments within the ACPI table data definition. There exist some
674 dump utilities seen in the field that create this type of hex dump (such
675 as Simics). For example:
677 DSDT @ 0xdfffd0c0 (10999 bytes)
685 Creator_id 1280593481
686 Creator_revision 537399345
687 0000: 44 53 44 54 f7 2a 00 00 01 f3 42 58 50 43 00 00
689 2af0: 5f 4c 30 46 00 a4 01
691 Test suite: Miscellaneous changes/fixes:
692 More cleanup and simplification of makefiles
693 Continue compilation of test cases after a compile failure
694 Do not perform binary compare unless both files actually exist
696 iASL: Performed some code/module restructuring. Moved all memory
697 allocation functions to new modules. Two new files, aslallocate.c and
700 ----------------------------------------
701 31 August 2017. Summary of changes for version 20170831:
704 1) ACPICA kernel-resident subsystem:
706 Implemented internal support for full 64-bit addresses that appear in all
707 Generic Address Structure (GAS) structures. Previously, only the lower 32
708 bits were used. Affects the use of GAS structures in the FADT and other
709 tables, as well as the GAS structures passed to the AcpiRead and
710 AcpiWrite public external interfaces that are used by drivers. Lv Zheng.
712 Added header support for the PDTT ACPI table (Processor Debug Trigger
713 Table). Full support in the iASL Data Table Compiler and disassembler is
717 2) iASL Compiler/Disassembler and Tools:
719 iASL/Disassembler: Fixed a problem with the PPTT ACPI table (Processor
720 Properties Topology Table) where a flag bit was specified in the wrong
721 bit position ("Line Size Valid", bit 6).
723 iASL: Implemented support for Octal integer constants as defined by the
724 ASL language grammar, per the ACPI specification. Any integer constant
725 that starts with a zero is an octal constant. For example,
726 Store (037777, Local0) /* Octal constant */
727 Store (0x3FFF, Local0) /* Hex equivalent */
728 Store (16383, Local0) /* Decimal equivalent */
730 iASL: Improved overflow detection for 64-bit string conversions during
731 compilation of integer constants. "Overflow" in this case means a string
732 that represents an integer that is too large to fit into a 64-bit value.
733 Any 64-bit constants within a 32-bit DSDT or SSDT are still truncated to
734 the low-order 32 bits with a warning, as previously implemented. Several
735 new exceptions are defined that indicate a 64-bit overflow, as well as
736 the base (radix) that was used during the attempted conversion. Examples:
737 Local0 = 0xAAAABBBBCCCCDDDDEEEEFFFF // AE_HEX_OVERFLOW
738 Local0 = 01111222233334444555566667777 // AE_OCTAL_OVERFLOW
739 Local0 = 11112222333344445555666677778888 // AE_DECIMAL_OVERFLOW
741 iASL: Added a warning for the case where a ResourceTemplate is declared
742 with no ResourceDescriptor entries (coded as "ResourceTemplate(){}"). In
743 this case, the resulting template is created with a single END_TAG
744 descriptor, which is essentially useless.
746 iASL: Expanded the -vw option (ignore specific warnings/remarks) to
747 include compilation error codes as well.
749 ----------------------------------------
750 28 July 2017. Summary of changes for version 20170728:
753 1) ACPICA kernel-resident subsystem:
755 Fixed a regression seen with small resource descriptors that could cause
756 an inadvertent AE_AML_NO_RESOURCE_END_TAG exception.
758 AML interpreter: Implemented a new feature that allows forward references
759 from individual named references within package objects that are
760 contained within blocks of "module-level code". This provides
761 compatibility with other ACPI implementations and supports existing
762 firmware that depends on this feature. Example:
765 If (ABCD) /* An If() at module-level */
767 Name (PKG1, Package()
769 INT1 /* Forward reference to object INT1
775 AML Interpreter: Fixed a problem with the Alias() operator where aliases
776 to some ASL objects were not handled properly. Objects affected are:
777 Mutex, Event, and OperationRegion.
779 AML Debugger: Enhanced to properly handle AML Alias objects. These
780 objects have one level of indirection which was not fully supported by
783 Table Manager: Added support to detect and ignore duplicate SSDTs within
784 the XSDT/RSDT. This error in the XSDT has been seen in the field.
786 EFI and EDK2 support:
787 Enabled /WX flag for MSVC builds
788 Added support for AcpiOsStall, AcpiOsSleep, and AcpiOsGetTimer
789 Added local support for 64-bit multiply and shift operations
790 Added support to compile acpidump.efi on Windows
791 Added OSL function stubs for interfaces not used under EFI
793 Added additional support for the _DMA predefined name. _DMA returns a
794 buffer containing a resource template. This change add support within the
795 resource manager (AcpiWalkResourceBuffer) to walk and parse this list of
796 resource descriptors. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
799 2) iASL Compiler/Disassembler and Tools:
801 iASL: Fixed a problem where the internal input line buffer(s) could
802 overflow if there are very long lines in the input ASL source code file.
803 Implemented buffer management that automatically increases the size of
804 the buffers as necessary.
806 iASL: Added an option (-vx) to "expect" particular remarks, warnings and
807 errors. If the specified exception is not raised during compilation, the
808 compiler emits an error. This is intended to support the ASL test suite,
809 but may be useful in other contexts.
811 iASL: Implemented a new predefined macro, __METHOD__, which returns a
812 string containing the name of the current control method that is being
815 iASL: Implemented debugger and table compiler support for the SDEI ACPI
816 table (Software Delegated Exception Interface). James Morse
817 <james.morse@arm.com>
819 Unix/Linux makefiles: Added an option to disable compile optimizations.
820 The disable occurs when the NOOPT flag is set to TRUE.
821 theracermaster@gmail.com
823 Acpidump: Added support for multiple DSDT and FACS tables. This can occur
824 when there are different tables for 32-bit versus 64-bit.
826 Enhanced error reporting for the ASL test suite (ASLTS) by removing
827 unnecessary/verbose text, and emit the actual line number where an error
828 has occurred. These changes are intended to improve the usefulness of the
831 ----------------------------------------
832 29 June 2017. Summary of changes for version 20170629:
835 1) ACPICA kernel-resident subsystem:
837 Tables: Implemented a deferred ACPI table verification. This is useful
838 for operating systems where the tables cannot be verified in the early
839 initialization stage due to early memory mapping limitations on some
840 architectures. Lv Zheng.
842 Tables: Removed the signature validation for dynamically loaded tables.
843 Provides compatibility with other ACPI implementations. Previously, only
844 SSDT tables were allowed, as per the ACPI specification. Now, any table
845 signature can be used via the Load() operator. Lv Zheng.
847 Tables: Fixed several mutex issues that could cause errors during table
848 acquisition. Lv Zheng.
850 Tables: Fixed a problem where an ACPI warning could be generated if a
851 null pointer was passed to the AcpiPutTable interface. Lv Zheng.
853 Tables: Added a mechanism to handle imbalances for the AcpiGetTable and
854 AcpiPutTable interfaces. This applies to the "late stage" table loading
855 when the use of AcpiPutTable is no longer required (since the system
856 memory manager is fully running and available). Lv Zheng.
858 Fixed/Reverted a regression during processing of resource descriptors
859 that contain only a single EndTag. Fixes an AE_AML_NO_RESOURCE_END_TAG
860 exception in this case.
862 Headers: IORT/SMMU support: Updated the SMMU models for Revision C of the
863 I/O Remapping specification. Robin Murphy <robin.murphy@arm.com>
865 Interpreter: Fixed a possible fault if an Alias operator with an invalid
866 or duplicate target is encountered during Alias creation in
867 AcpiExCreateAlias. Alex James <theracermaster@gmail.com>
869 Added an option to use designated initializers for function pointers.
870 Kees Cook <keescook@google.com>
873 2) iASL Compiler/Disassembler and Tools:
875 iASL: Allow compilation of External declarations with target pathnames
876 that refer to existing named objects within the table. Erik Schmauss.
878 iASL: Fixed a regression when compiling FieldUnits. Fixes an error if a
879 FieldUnit name also is declared via External in the same table. Erik
882 iASL: Allow existing scope names within pathnames used in External
883 statements. For example:
884 External (ABCD.EFGH) // ABCD exists, but EFGH is truly external
887 iASL: IORT ACPI table: Implemented changes required to decode the new
888 Proximity Domain for the SMMUv3 IORT. Disassembler and Data Table
889 compiler. Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
891 Disassembler: Don't abort disassembly on errors from External()
892 statements. Erik Schmauss.
894 Disassembler: fixed a possible fault when one of the Create*Field
895 operators references a Resource Template. ACPICA Bugzilla 1396.
897 iASL: In the source code, resolved some naming inconsistences across the
898 parsing support. Fixes confusion between "Parse Op" and "Parse Node".
899 Adds a new file, aslparseop.c
901 ----------------------------------------
902 31 May 2017. Summary of changes for version 20170531:
907 The ACPI specification version 6.2 has been released and is available at
908 http://uefi.org/specifications
910 This version of ACPICA fully supports the ACPI 6.2 specification. Changes
911 are summarized below.
913 New ACPI tables (Table Compiler/Disassembler/Templates):
914 HMAT (Heterogeneous Memory Attributes Table)
915 WSMT (Windows SMM Security Mitigation Table)
916 PPTT (Processor Properties Topology Table)
918 New subtables for existing ACPI tables:
919 HEST (New subtable, Arch-deferred machine check)
920 SRAT (New subtable, Arch-specific affinity structure)
921 PCCT (New subtables, Extended PCC subspaces (types 3 and 4))
923 Simple updates for existing ACPI tables:
924 BGRT (two new flag bits)
925 HEST (New bit defined for several subtables, GHES_ASSIST)
927 New Resource Descriptors and Resource macros (Compiler/Disassembler):
933 New type for hardware error notification (section 18.3.2.9)
935 New predefined names/methods (Compiler/Interpreter):
936 _HMA (Heterogeneous Memory Attributes)
937 _LSI (Label Storage Information)
938 _LSR (Label Storage Read)
939 _LSW (Label Storage Write)
941 ASL grammar/macro changes (Compiler):
942 For() ASL macro, implemented with the AML while operator
943 Extensions to Concatenate operator
944 Support for multiple definition blocks in same ASL file
945 Clarification for Buffer operator
946 Allow executable AML code underneath all scopes (Devices, etc.)
947 Clarification/change for the _OSI return value
948 ASL grammar update for reference operators
949 Allow a zero-length string for AML filename in DefinitionBlock
952 New device object notification value
953 Remove a notify value (0x0C) for graceful shutdown
954 New UUIDs for processor/cache properties and
955 physical package property
956 New _HID, ACPI0014 (Wireless Power Calibration Device)
959 1) ACPICA kernel-resident subsystem:
961 Added support to disable ACPI events on hardware-reduced platforms.
962 Eliminates error messages of the form "Could not enable fixed event". Lv
965 Fixed a problem using Device/Thermal objects with the ObjectType and
966 DerefOf ASL operators. This support had not been fully/properly
969 Fixed a problem where if a Buffer object containing a resource template
970 was longer than the actual resource template, an error was generated --
971 even though the AML is legal. This case has been seen in the field.
973 Fixed a problem with the header definition of the MADT PCAT_COMPAT flag.
974 The values for DUAL_PIC and MULTIPLE_APIC were reversed.
976 Added header file changes for the TPM2 ACPI table. Update to new version
977 of the TCG specification. Adds a new TPM2 subtable for ARM SMC.
979 Exported the external interfaces AcpiAcquireMutex and AcpiReleaseMutex.
980 These interfaces are intended to be used only in conjunction with the
981 predefined _DLM method (Device Lock Method). "This object appears in a
982 device scope when AML access to the device must be synchronized with the
985 Example Code and Data Size: These are the sizes for the OS-independent
986 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
987 debug version of the code includes the debug output trace mechanism and
988 has a much larger code and data size.
991 Non-Debug Version: 143.1K Code, 60.0K Data, 203.1K Total
992 Debug Version: 204.0K Code, 84.3K Data, 288.3K Total
994 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
995 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
998 2) iASL Compiler/Disassembler and Tools:
1000 iASL: Fixed a problem where an External() declaration could not refer to
1001 a Field Unit. Erik Schmauss.
1003 Disassembler: Improved support for the Switch/Case operators. This
1004 feature will disassemble AML code back to the original Switch operators
1005 when possible, instead of an If..Else sequence. David Box
1007 iASL and disassembler: Improved the handling of multiple extraneous
1008 parentheses for both ASL input and disassembled ASL output.
1010 Improved the behavior of the iASL compiler and disassembler to detect
1011 improper use of external declarations
1013 Disassembler: Now aborts immediately upon detection of an unknown AML
1014 opcode. The AML parser has no real way to recover from this, and can
1015 result in the creation of an ill-formed parse tree that causes errors
1016 later during the disassembly.
1018 All tools: Fixed a problem where the Unix application OSL did not handle
1019 control-c correctly. For example, a control-c could incorrectly wake the
1022 AcpiExec: Improved the Control-C handling and added a handler for
1023 segmentation faults (SIGSEGV). Supports both Windows and Unix-like
1026 Reduced the verbosity of the generic unix makefiles. Previously, each
1027 compilation displayed the full set of compiler options. This has been
1028 eliminated as the options are easily inspected within the makefiles. Each
1029 compilation now results in a single line of output.
1031 ----------------------------------------
1032 03 March 2017. Summary of changes for version 20170303:
1035 0) ACPICA licensing:
1037 The licensing information at the start of each source code module has
1038 been updated. In addition to the Intel license, the dual GPLv2/BSD
1039 license has been added for completeness. Now, a single version of the
1040 source code should be suitable for all ACPICA customers. This is the
1041 major change for this release since it affects all source code modules.
1044 1) ACPICA kernel-resident subsystem:
1046 Fixed two issues with the common asltypes.h header that could cause
1047 problems in some environments: (Kim Jung-uk)
1048 Removed typedef for YY_BUFFER_STATE ?
1049 Fixes an error with earlier versions of Flex.
1050 Removed use of FILE typedef (which is only defined in stdio.h)
1053 2) iASL Compiler/Disassembler and Tools:
1055 Disassembler: fixed a regression introduced in 20170224. A fix for a
1056 memory leak related to resource descriptor tags (names) could fault when
1057 the disassembler was generated with 64-bit compilers.
1059 The ASLTS test suite has been updated to implement a new testing
1060 architecture. During generation of the suite from ASL source, both the
1061 ASL and ASL+ compilers are now validated, as well as the disassembler
1062 itself (Erik Schmauss). The architecture executes as follows:
1064 For every ASL source module:
1065 Compile (legacy ASL compilation)
1066 Disassemble the resulting AML to ASL+ source code
1067 Compile the new ASL+ module
1068 Perform a binary compare on the legacy AML and the new ASL+ AML
1069 The ASLTS suite then executes normally using the AML binaries.
1071 ----------------------------------------
1072 24 February 2017. Summary of changes for version 20170224:
1075 1) ACPICA kernel-resident subsystem:
1077 Interpreter: Fixed two issues with the control method return value auto-
1078 repair feature, where an attempt to double-delete an internal object
1079 could result in an ACPICA warning (for _CID repair and others). No fault
1080 occurs, however, because the attempted deletion (actually a release to an
1081 internal cache) is detected and ignored via object poisoning.
1083 Debugger: Fixed an AML interpreter mutex issue during the single stepping
1084 of control methods. If certain debugger commands are executed during
1085 stepping, a mutex aquire/release error could occur. Lv Zheng.
1087 Fixed some issues generating ACPICA with the Intel C compiler by
1088 restoring the original behavior and compiler-specific include file in
1091 Example Code and Data Size: These are the sizes for the OS-independent
1092 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1093 debug version of the code includes the debug output trace mechanism and
1094 has a much larger code and data size.
1097 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
1098 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
1100 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1101 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1104 2) iASL Compiler/Disassembler and Tools:
1106 iASL/Disassembler: A preliminary version of a new ASL-to-ASL+ conversion
1107 tool has been designed, implemented, and included in this release. The
1108 key feature of this utility is that the original comments within the
1109 input ASL file are preserved during the conversion process, and included
1110 within the converted ASL+ file -- thus creating a transparent conversion
1111 of existing ASL files to ASL+ (ASL 2.0). Erik Schmauss.
1113 Usage: iasl -ca <ASL-filename> // Output is a .dsl file with
1116 iASL/Disassembler: Improved the detection and correct disassembly of
1117 Switch/Case operators. This feature detects sequences of if/elseif/else
1118 operators that originated from ASL Switch/Case/Default operators and
1119 emits the original operators. David Box.
1121 iASL: Improved the IORT ACPI table support in the following areas. Lv
1123 Clear MappingOffset if the MappingCount is zero.
1124 Fix the disassembly of the SMMU GSU interrupt offset.
1125 Update the template file for the IORT table.
1127 Disassembler: Enhanced the detection and disassembly of resource
1128 template/descriptor within a Buffer object. An EndTag descriptor is now
1129 required to have a zero second byte, since all known ASL compilers emit
1130 this. This helps eliminate incorrect decisions when a buffer is
1131 disassembled (false positives on resource templates).
1133 ----------------------------------------
1134 19 January 2017. Summary of changes for version 20170119:
1137 1) General ACPICA software:
1139 Entire source code base: Added the 2017 copyright to all source code
1140 legal/licensing module headers and utility/tool signons. This includes
1141 the standard Linux dual-license header. This affects virtually every file
1142 in the ACPICA core subsystem, iASL compiler, all ACPICA utilities, and
1143 the ACPICA test suite.
1146 2) iASL Compiler/Disassembler and Tools:
1148 iASL: Removed/fixed an inadvertent remark when a method argument
1149 containing a reference is used as a target operand within the method (and
1150 never used as a simple argument), as in the example below. Jeffrey Hugo.
1152 dsdt.asl 1507: Store(0x1, Arg0)
1153 Remark 2146 - ^ Method Argument is never used (Arg0)
1155 All tools: Removed the bit width of the compiler that generated the tool
1156 from the common signon for all user space tools. This proved to be
1157 confusing and unnecessary. This includes similar removal of HARDWARE_NAME
1158 from the generic makefiles (Thomas Petazzoni). Example below.
1161 ASL+ Optimizing Compiler version 20170119-32
1162 ASL+ Optimizing Compiler version 20170119-64
1165 ASL+ Optimizing Compiler version 20170119
1167 ----------------------------------------
1168 22 December 2016. Summary of changes for version 20161222:
1171 1) ACPICA kernel-resident subsystem:
1173 AML Debugger: Implemented a new mechanism to simplify and enhance
1174 debugger integration into all environments, including kernel debuggers
1175 and user-space utilities, as well as remote debug services. This
1176 mechanism essentially consists of new OSL interfaces to support debugger
1177 initialization/termination, as well as wait/notify interfaces to perform
1178 the debugger handshake with the host. Lv Zheng.
1181 AcpiOsInitializeDebugger (void)
1182 AcpiOsTerminateDebugger (void)
1183 AcpiOsWaitCommandReady (void)
1184 AcpiOsNotifyCommandComplete (void)
1186 New OS services layer:
1187 osgendbg.c -- Example implementation, and used for AcpiExec
1189 Update for Generic Address Space (GAS) support: Although the AccessWidth
1190 and/or BitOffset fields of the GAS are not often used, this change now
1191 fully supports these fields. This affects the internal support for FADT
1192 registers, registers in other ACPI data tables, and the AcpiRead and
1193 AcpiWrite public interfaces. Lv Zheng.
1195 Sleep support: In order to simplify integration of ACPI sleep for the
1196 various host operating systems, a new OSL interface has been introduced.
1197 AcpiOsEnterSleep allows the host to perform any required operations
1198 before the final write to the sleep control register(s) is performed by
1202 AcpiOsEnterSleep(SleepState, RegisterAValue, RegisterBValue)
1204 Called from these internal interfaces:
1208 EFI support: Added a very small EFI/ACPICA example application. Provides
1209 a simple demo for EFI integration, as well as assisting with resolution
1210 of issues related to customer ACPICA/EFI integration. Lv Zheng. See:
1212 source/tools/efihello/efihello.c
1214 Local C library: Implemented several new functions to enhance ACPICA
1215 portability, for environments where these clib functions are not
1216 available (such as EFI). Lv Zheng:
1223 Fixed a regression where occasionally a valid resource descriptor was
1224 incorrectly detected as invalid at runtime, and a
1225 AE_AML_NO_RESOURCE_END_TAG was returned.
1227 Fixed a problem with the recently implemented support that enables
1228 control method invocations as Target operands to many ASL operators.
1229 Warnings of this form: "Needed type [Reference], found [Processor]" were
1230 seen at runtime for some method invocations.
1232 Example Code and Data Size: These are the sizes for the OS-independent
1233 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1234 debug version of the code includes the debug output trace mechanism and
1235 has a much larger code and data size.
1238 Non-Debug Version: 141.5K Code, 58.5K Data, 200.0K Total
1239 Debug Version: 201.7K Code, 82.7K Data, 284.4K Total
1241 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1242 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
1245 2) iASL Compiler/Disassembler and Tools:
1247 Disassembler: Enhanced output by adding the capability to detect and
1248 disassemble ASL Switch/Case statements back to the original ASL source
1249 code instead of if/else blocks. David Box.
1251 AcpiHelp: Split a large file into separate files based upon
1252 functionality/purpose. New files are:
1256 ----------------------------------------
1257 17 November 2016. Summary of changes for version 20161117:
1260 1) ACPICA kernel-resident subsystem:
1262 Table Manager: Fixed a regression introduced in 20160729, "FADT support
1263 cleanup". This was an attempt to remove all references in the source to
1264 the FADT version 2, which never was a legal version number. It was
1265 skipped because it was an early version of 64-bit support that was
1266 eventually abandoned for the current 64-bit support.
1268 Interpreter: Fixed a problem where runtime implicit conversion was
1269 incorrectly disabled for the ASL operators below. This brings the
1270 behavior into compliance with the ACPI specification:
1278 Table Manager: Added a new public interface, AcpiPutTable, used to
1279 release and free an ACPI table returned by AcpiGetTable and related
1280 interfaces. Lv Zheng.
1282 Example Code and Data Size: These are the sizes for the OS-independent
1283 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1284 debug version of the code includes the debug output trace mechanism and
1285 has a much larger code and data size.
1288 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1289 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
1291 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1292 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
1295 2) iASL Compiler/Disassembler and Tools:
1297 Disassembler: Fixed a regression for disassembly of Resource Template.
1298 Detection of templates in the AML stream missed some types of templates.
1300 iASL: Fixed a problem where an Access Size error was returned for the PCC
1301 address space when the AccessSize of the GAS register is greater than a
1304 iASL: Implemented several grammar changes for the operators below. These
1305 changes are slated for the next version of the ACPI specification:
1306 RefOf - Disallow method invocation as an operand
1307 CondRefOf - Disallow method invocation as an operand
1308 DerefOf - Disallow operands that use the result from operators
1310 do not return a reference (Changed TermArg to
1313 iASL: Control method invocations are now allowed for Target operands, as
1314 per the ACPI specification. Removed error for using a control method
1315 invocation as a Target operand.
1317 Disassembler: Improved detection of Resource Templates, Unicode, and
1318 Strings within Buffer objects. These subtypes do not contain a specific
1319 opcode to indicate the originating ASL code, and they must be detected by
1320 other means within the disassembler.
1322 iASL: Implemented an optimization improvement for 32-bit ACPI tables
1323 (DSDT/SSDT). For the 32-bit case only, compute the optimum integer opcode
1324 only after 64-bit to 32-bit truncation. A truncation warning message is
1325 still emitted, however.
1327 AcpiXtract: Implemented handling for both types of line terminators (LF
1328 or CR/LF) so that it can accept AcpiDump output files from any system.
1331 AcpiBin: Added two new options for comparing AML files:
1332 -a: compare and display ALL mismatches
1333 -o: start compare at this offset into the second file
1335 ----------------------------------------
1336 30 September 2016. Summary of changes for version 20160930:
1339 1) ACPICA kernel-resident subsystem:
1341 Fixed a regression in the internal AcpiTbFindTable function where a non
1342 AE_OK exception could inadvertently be returned even if the function did
1343 not fail. This problem affects the following operators:
1347 Fixed a regression in the LoadTable operator where a load to any
1348 namespace location other than the root no longer worked properly.
1350 Increased the maximum loop count value that will result in the
1351 AE_AML_INFINITE_LOOP exception. This is a mechanism that is intended to
1352 prevent infinite loops within the AML interpreter and thus the host OS
1353 kernel. The value is increased from 0xFFFF to 0xFFFFF loops (65,535 to
1356 Moved the AcpiGbl_MaxLoopIterations configuration variable to the public
1357 acpixf.h file. This allows hosts to easily configure the maximum loop
1360 Removed an illegal character in the strtoul64.c file. This character
1361 caused errors with some C compilers.
1363 Example Code and Data Size: These are the sizes for the OS-independent
1364 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1365 debug version of the code includes the debug output trace mechanism and
1366 has a much larger code and data size.
1369 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1370 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
1372 Non-Debug Version: 140.0K Code, 58.1K Data, 198.1K Total
1373 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
1376 2) iASL Compiler/Disassembler and Tools:
1378 Disassembler: Fixed a problem with the conversion of Else{If{ blocks into
1379 the simpler ASL ElseIf keyword. During the conversion, a trailing If
1380 block could be lost and missing from the disassembled output.
1382 iASL: Fixed a missing parser rule for the ObjectType operator. For ASL+,
1383 the missing rule caused a parse error when using the Index operator as an
1384 operand to ObjectType. This construct now compiles properly. Example:
1385 ObjectType(PKG1[4]).
1387 iASL: Correctly handle unresolved symbols in the hardware map file (-lm
1388 option). Previously, unresolved symbols could cause a protection fault.
1389 Such symbols are now marked as unresolved in the map file.
1391 iASL: Implemented support to allow control method invocations as an
1392 operand to the ASL DeRefOf operator. Example:
1393 DeRefOf(MTH1(Local0))
1395 Disassembler: Improved support for the ToPLD ASL macro. Detection of a
1396 possible _PLD buffer now includes examination of both the normal buffer
1397 length (16 or 20) as well as the surrounding AML package length.
1399 Disassembler: Fixed a problem with the decoding of complex expressions
1400 within the Divide operator for ASL+. For the case where both the quotient
1401 and remainder targets are specified, the entire statement cannot be
1402 disassembled. Previously, the output incorrectly contained a mix of ASL-
1403 and ASL+ operators. This mixed statement causes a syntax error when
1405 Divide (Add (INT1, 6), 128, RSLT, QUOT) // was incorrectly
1407 Divide (INT1 + 6, 128, RSLT, QUOT)
1409 iASL/Tools: Added support to process AML and non-AML ACPI tables
1410 consistently. For the disassembler and AcpiExec, allow all types of ACPI
1411 tables (AML and data tables). For the iASL -e option, allow only AML
1414 ----------------------------------------
1415 31 August 2016. Summary of changes for version 20160831:
1418 1) ACPICA kernel-resident subsystem:
1420 Improve support for the so-called "module-level code", which is defined
1421 to be math, logical and control AML opcodes that appear outside of any
1422 control method. This change improves the support by adding more opcodes
1423 that can be executed in the manner. Some other issues have been solved,
1424 and the ASL grammar changes to support such code under all scope
1425 operators (Device, etc.) are complete. Lv Zheng.
1427 UEFI support: these OSL functions have been implemented. This is an
1428 additional step toward supporting the AcpiExec utility natively (with
1429 full hardware access) under UEFI. Marcelo Ferreira.
1430 AcpiOsReadPciConfiguration
1431 AcpiOsWritePciConfiguration
1433 Fixed a possible mutex error during control method auto-serialization. Lv
1436 Updated support for the Generic Address Structure by fully implementing
1437 all GAS fields when a 32-bit address is expanded to a 64-bit GAS. Lv
1440 Updated the return value for the internal _OSI method. Instead of
1441 0xFFFFFFFF, the "Ones" value is now returned, which is 0xFFFFFFFFFFFFFFFF
1442 for 64-bit ACPI tables. This fixes an incompatibility with other ACPI
1443 implementations, and will be reflected and clarified in the next version
1444 of the ACPI specification.
1446 Implemented two new table events that can be passed to an ACPICA table
1447 handler. These events are used to indicate a table installation or
1448 uninstallation. These events are used in addition to existed table load
1449 and unload events. Lv Zheng.
1451 Implemented a cleanup for all internal string-to-integer conversions.
1452 Consolidate multiple versions of this functionality and limit possible
1453 bases to either 10 or 16 to simplify the code. Adds a new file,
1456 Cleanup the inclusion order of the various compiler-specific headers.
1457 This simplifies build configuration management. The compiler-specific
1458 headers are now split out from the host-specific headers. Lv Zheng.
1460 Example Code and Data Size: These are the sizes for the OS-independent
1461 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1462 debug version of the code includes the debug output trace mechanism and
1463 has a much larger code and data size.
1466 Non-Debug Version: 140.1K Code, 58.1K Data, 198.1K Total
1467 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
1470 2) iASL Compiler/Disassembler and Tools:
1472 iASL/AcpiExec: Added a command line option to display the build date/time
1473 of the tool (-vd). This can be useful to verify that the correct version
1474 of the tools are being used.
1476 AML Debugger: Implemented a new subcommand ("execute predef") to execute
1477 all predefined control methods and names within the current namespace.
1478 This can be useful for debugging problems with ACPI tables and the ACPI
1481 ----------------------------------------
1482 29 July 2016. Summary of changes for version 20160729:
1485 1) ACPICA kernel-resident subsystem:
1487 Implemented basic UEFI support for the various ACPICA tools. This
1489 1) An OSL to implement the various AcpiOs* interfaces on UEFI.
1490 2) Support to obtain the ACPI tables on UEFI.
1491 3) Local implementation of required C library functions not available on
1493 4) A front-end (main) function for the tools for UEFI-related
1496 The initial deployment of this support is the AcpiDump utility executing
1497 as an UEFI application via EDK2 (EDKII, "UEFI Firmware Development Kit").
1498 Current environments supported are Linux/Unix. MSVC generation is not
1499 supported at this time. See the generate/efi/README file for build
1500 instructions. Lv Zheng.
1502 Future plans include porting the AcpiExec utility to execute natively on
1503 the platform with I/O and memory access. This will allow viewing/dump of
1504 the platform namespace and native execution of ACPI control methods that
1505 access the actual hardware. To fully implement this support, the OSL
1506 functions below must be implemented with UEFI interfaces. Any community
1507 help in the implementation of these functions would be appreciated:
1512 AcpiOsReadPciConfiguration
1513 AcpiOsWritePciConfiguration
1515 Restructured and standardized the C library configuration for ACPICA,
1516 resulting in the various configuration options below. This includes a
1517 global restructuring of the compiler-dependent and platform-dependent
1518 include files. These changes may affect the existing platform-dependent
1519 configuration files on some hosts. Lv Zheng.
1521 The current C library configuration options appear below. For any issues,
1522 it may be helpful to examine the existing compiler-dependent and
1523 platform-dependent files as examples. Lv Zheng.
1526 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1528 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
1529 2) Unix/Windows/BSD applications:
1530 ACPI_USE_STANDARD_HEADERS=y in order to use system-provided C
1532 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
1533 3) UEFI applications:
1534 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1536 ACPI_USE_SYSTEM_CLIBRARY=n in order to use ACPICA mini C library.
1537 4) UEFI applications (EDK2/StdLib):
1538 ACPI_USE_STANDARD_HEADERS=y in order to use EDK2 StdLib C library.
1539 ACPI_USE_SYSTEM_CLIBRARY=y in order to use EDK2 StdLib C library.
1542 AML interpreter: "module-level code" support. Allows for execution of so-
1543 called "executable" AML code (math/logical operations, etc.) outside of
1544 control methods not just at the module level (top level) but also within
1545 any scope declared outside of a control method - Scope{}, Device{},
1546 Processor{}, PowerResource{}, and ThermalZone{}. Lv Zheng.
1548 Simplified the configuration of the "maximum AML loops" global option by
1549 adding a global public variable, "AcpiGbl_MaxLoopIterations" which can be
1550 modified at runtime.
1553 Example Code and Data Size: These are the sizes for the OS-independent
1554 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1555 debug version of the code includes the debug output trace mechanism and
1556 has a much larger code and data size.
1559 Non-Debug Version: 139.1K Code, 22.9K Data, 162.0K Total
1560 Debug Version: 199.0K Code, 81.8K Data, 280.8K Total
1563 2) iASL Compiler/Disassembler and Tools:
1565 iASL: Add full support for the RASF ACPI table (RAS Features Table).
1566 Includes disassembler, data table compiler, and header support.
1568 iASL Expand "module-level code" support. Allows for
1569 compilation/disassembly of so-called "executable" AML code (math/logical
1570 operations, etc.) outside of control methods not just at the module level
1571 (top level) but also within any scope declared outside of a control
1572 method - Scope{}, Device{}, Processor{}, PowerResource{}, and
1575 AcpiDump: Added support for dumping all SSDTs on newer versions of
1576 Windows. These tables are now easily available -- SSDTs are not available
1577 through the registry on older versions.
1579 ----------------------------------------
1580 27 May 2016. Summary of changes for version 20160527:
1583 1) ACPICA kernel-resident subsystem:
1585 Temporarily reverted the new arbitrary bit length/alignment support in
1586 AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been
1587 a number of regressions with the new code that need to be fully resolved
1588 and tested before this support can be finally integrated into ACPICA.
1589 Apologies for any inconveniences these issues may have caused.
1591 The ACPI message macros are not configurable (ACPI_MSG_ERROR,
1592 ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR,
1593 and ACPI_MSG_BIOS_WARNING). Lv Zheng.
1595 Fixed a couple of GCC warnings associated with the use of the -Wcast-qual
1596 option. Adds a new return macro, return_STR. Junk-uk Kim.
1598 Example Code and Data Size: These are the sizes for the OS-independent
1599 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1600 debug version of the code includes the debug output trace mechanism and
1601 has a much larger code and data size.
1604 Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
1605 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1607 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1608 Debug Version: 200.9K Code, 82.2K Data, 283.1K Total
1610 ----------------------------------------
1611 22 April 2016. Summary of changes for version 20160422:
1613 1) ACPICA kernel-resident subsystem:
1615 Fixed a regression in the GAS (generic address structure) arbitrary bit
1616 support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior
1617 and incorrect return values. Lv Zheng. ACPICA BZ 1270.
1619 ACPI 6.0: Added support for new/renamed resource macros. One new argument
1620 was added to each of these macros, and the original name has been
1621 deprecated. The AML disassembler will always disassemble to the new
1622 names. Support for the new macros was added to iASL, disassembler,
1623 resource manager, and the acpihelp utility. ACPICA BZ 1274.
1625 I2cSerialBus -> I2cSerialBusV2
1626 SpiSerialBus -> SpiSerialBusV2
1627 UartSerialBus -> UartSerialBusV2
1629 ACPI 6.0: Added support for a new integer field that was appended to the
1630 package object returned by the _BIX method. This adds iASL compile-time
1631 and AML runtime error checking. ACPICA BZ 1273.
1633 ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm
1634 Subspace Type2" (Headers, Disassembler, and data table compiler).
1636 Example Code and Data Size: These are the sizes for the OS-independent
1637 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1638 debug version of the code includes the debug output trace mechanism and
1639 has a much larger code and data size.
1642 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1643 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1645 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
1646 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
1649 2) iASL Compiler/Disassembler and Tools:
1651 iASL: Implemented an ASL grammar extension to allow/enable executable
1652 "module-level code" to be created and executed under the various
1653 operators that create new scopes. This type of AML code is already
1654 supported in all known AML interpreters, and the grammar change will
1655 appear in the next version of the ACPI specification. Simplifies the
1656 conditional runtime creation of named objects under these object types:
1664 iASL: Implemented a new ASL extension, a "For" loop macro to add greater
1665 ease-of-use to the ASL language. The syntax is similar to the
1666 corresponding C operator, and is implemented with the existing AML While
1667 opcode -- thus requiring no changes to existing AML interpreters.
1669 For (Initialize, Predicate, Update) {TermList}
1674 Initializer // Nothing | TermArg => ComputationalData
1675 Predicate // Nothing | TermArg => ComputationalData
1676 Update // Nothing | TermArg => ComputationalData
1680 iASL: The _HID/_ADR detection and validation has been enhanced to search
1681 under conditionals in order to allow these objects to be conditionally
1684 iASL: Fixed several issues with the constant folding feature. The
1685 improvement allows better detection and resolution of statements that can
1686 be folded at compile time. ACPICA BZ 1266.
1688 iASL/Disassembler: Fixed a couple issues with the Else{If{}...}
1689 conversion to the ASL ElseIf operator where incorrect ASL code could be
1692 iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where
1693 sometimes an extra (and extraneous) set of parentheses were emitted for
1694 some combinations of operators. Although this did not cause any problems
1695 with recompilation of the disassembled code, it made the code more
1696 difficult to read. David Box. ACPICA BZ 1231.
1698 iASL: Changed to ignore the unreferenced detection for predefined names
1699 of resource descriptor elements, when the resource descriptor is
1700 created/defined within a control method.
1702 iASL: Disassembler: Fix a possible fault with externally declared Buffer
1705 ----------------------------------------
1706 18 March 2016. Summary of changes for version 20160318:
1708 1) ACPICA kernel-resident subsystem:
1710 Added support for arbitrary bit lengths and bit offsets for registers
1711 defined by the Generic Address Structure. Previously, only aligned bit
1712 lengths of 8/16/32/64 were supported. This was sufficient for many years,
1713 but recently some machines have been seen that require arbitrary bit-
1714 level support. ACPICA BZ 1240. Lv Zheng.
1716 Fixed an issue where the \_SB._INI method sometimes must be evaluated
1717 before any _REG methods are evaluated. Lv Zheng.
1719 Implemented several changes related to ACPI table support
1720 (Headers/Disassembler/TableCompiler):
1721 NFIT: For ACPI 6.1, updated to add some additional new fields and
1723 FADT: Updated a warning message and set compliance to ACPI 6.1 (Version
1725 DMAR: Added new constants per the 10/2014 DMAR spec.
1726 IORT: Added new subtable per the 10/2015 IORT spec.
1727 HEST: For ACPI 6.1, added new constants and new subtable.
1728 DBG2: Added new constants per the 12/2015 DBG2 spec.
1729 FPDT: Fixed several incorrect fields, add the FPDT boot record structure.
1731 ERST/EINJ: Updated disassembler with new "Execute Timings" actions.
1733 Updated header support for the DMAR table to match the current version of
1736 Added extensions to the ASL Concatenate operator to allow any ACPI object
1737 to be passed as an operand. Any object other than Integer/String/Buffer
1738 simply returns a string containing the object type. This extends the
1739 usefulness of the Printf macros. Previously, Concatenate would abort the
1740 control method if a non-data object was encountered.
1742 ACPICA source code: Deployed the C "const" keyword across the source code
1743 where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).
1745 Example Code and Data Size: These are the sizes for the OS-independent
1746 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1747 debug version of the code includes the debug output trace mechanism and
1748 has a much larger code and data size.
1751 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
1752 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
1754 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
1755 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
1758 2) iASL Compiler/Disassembler and Tools:
1760 iASL/Disassembler: Improved the heuristic used to determine the number of
1761 arguments for an externally defined control method (a method in another
1762 table). Although this is an improvement, there is no deterministic way to
1763 "guess" the number of method arguments. Only the ACPI 6.0 External opcode
1764 will completely solve this problem as it is deployed (automatically) in
1767 iASL/Disassembler: Fixed an ordering issue for emitted External() ASL
1768 statements that could cause errors when the disassembled file is
1769 compiled. ACPICA BZ 1243. David Box.
1771 iASL: Fixed a regression caused by the merger of the two versions of the
1772 local strtoul64. Because of a dependency on a global variable, strtoul64
1773 could return an error for integers greater than a 32-bit value. ACPICA BZ
1776 iASL: Fixed a regression where a fault could occur for an ASL Return
1777 statement if it invokes a control method that is not resolved. ACPICA BZ
1780 AcpiXtract: Improved input file validation: detection of binary files and
1781 non-acpidump text files.
1783 ----------------------------------------
1784 12 February 2016. Summary of changes for version 20160212:
1786 1) ACPICA kernel-resident subsystem:
1788 Implemented full support for the ACPI 6.1 specification (released in
1789 January). This version of the specification is available at:
1790 http://www.uefi.org/specifications
1792 Only a relatively small number of changes were required in ACPICA to
1793 support ACPI 6.1, in these areas:
1794 - New predefined names
1796 - A new subtable for HEST
1797 - A few other header changes for new values
1799 Ensure \_SB_._INI is executed before any _REG methods are executed. There
1800 appears to be existing BIOS code that relies on this behavior. Lv Zheng.
1802 Reverted a change made in version 20151218 which enabled method
1803 invocations to be targets of various ASL operators (SuperName and Target
1804 grammar elements). While the new behavior is supported by the ACPI
1805 specification, other AML interpreters do not support this behavior and
1806 never will. The ACPI specification will be updated for ACPI 6.2 to remove
1807 this support. Therefore, the change was reverted to the original ACPICA
1810 ACPICA now supports the GCC 6 compiler.
1812 Current Release: (Note: build changes increased sizes)
1813 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
1814 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
1816 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
1817 Debug Version: 200.4K Code, 81.9K Data, 282.3K Total
1820 2) iASL Compiler/Disassembler and Tools:
1822 Completed full support for the ACPI 6.0 External() AML opcode. The
1823 compiler emits an external AML opcode for each ASL External statement.
1824 This opcode is used by the disassembler to assist with the disassembly of
1825 external control methods by specifying the required number of arguments
1826 for the method. AML interpreters do not use this opcode. To ensure that
1827 interpreters do not even see the opcode, a block of one or more external
1828 opcodes is surrounded by an "If(0)" construct. As this feature becomes
1829 commonly deployed in BIOS code, the ability of disassemblers to correctly
1830 disassemble AML code will be greatly improved. David Box.
1832 iASL: Implemented support for an optional cross-reference output file.
1833 The -lx option will create a the cross-reference file with the suffix
1834 "xrf". Three different types of cross-reference are created in this file:
1835 - List of object references made from within each control method
1836 - Invocation (caller) list for each user-defined control method
1837 - List of references to each non-method object in the namespace
1839 iASL: Method invocations as ASL Target operands are now disallowed and
1840 flagged as errors in preparation for ACPI 6.2 (see the description of the
1843 ----------------------------------------
1844 8 January 2016. Summary of changes for version 20160108:
1846 1) ACPICA kernel-resident subsystem:
1848 Updated all ACPICA copyrights and signons to 2016: Added the 2016
1849 copyright to all source code module headers and utility/tool signons.
1850 This includes the standard Linux dual-license header. This affects
1851 virtually every file in the ACPICA core subsystem, iASL compiler, all
1852 ACPICA utilities, and the ACPICA test suite.
1854 Fixed a regression introduced in version 20151218 concerning the
1855 execution of so-called module-level ASL/AML code. Namespace objects
1856 created under a module-level If() construct were not properly/fully
1857 entered into the namespace and could cause an interpreter fault when
1860 Example Code and Data Size: These are the sizes for the OS-independent
1861 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1862 debug version of the code includes the debug output trace mechanism and
1863 has a much larger code and data size.
1866 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
1867 Debug Version: 200.4K Code, 81.9K Data, 282.4K Total
1869 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
1870 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
1873 2) iASL Compiler/Disassembler and Tools:
1875 Fixed a problem with the compilation of the GpioIo and GpioInt resource
1876 descriptors. The _PIN field name was incorrectly defined to be an array
1877 of 32-bit values, but the _PIN values are in fact 16 bits each. This
1878 would cause incorrect bit width warnings when using Word (16-bit) fields
1879 to access the descriptors.
1882 ----------------------------------------
1883 18 December 2015. Summary of changes for version 20151218:
1885 1) ACPICA kernel-resident subsystem:
1887 Implemented per-AML-table execution of "module-level code" as individual
1888 ACPI tables are loaded into the namespace during ACPICA initialization.
1889 In other words, any module-level code within an AML table is executed
1890 immediately after the table is loaded, instead of batched and executed
1891 after all of the tables have been loaded. This provides compatibility
1892 with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng,
1895 To fully support the feature above, the default operation region handlers
1896 for the SystemMemory, SystemIO, and PCI_Config address spaces are now
1897 installed before any ACPI tables are loaded. This enables module-level
1898 code to access these address spaces during the table load and module-
1899 level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David
1902 Implemented several changes to the internal _REG support in conjunction
1903 with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples
1904 utilities for the changes above. Although these tools were changed, host
1905 operating systems that simply use the default handlers for SystemMemory,
1906 SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.
1908 For example, in the code below, DEV1 is conditionally added to the
1909 namespace by the DSDT via module-level code that accesses an operation
1910 region. The SSDT references DEV1 via the Scope operator. DEV1 must be
1911 created immediately after the DSDT is loaded in order for the SSDT to
1912 successfully reference DEV1. Previously, this code would cause an
1913 AE_NOT_EXIST exception during the load of the SSDT. Now, this code is
1914 fully supported by ACPICA.
1916 DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
1918 OperationRegion (OPR1, SystemMemory, 0x400, 32)
1919 Field (OPR1, AnyAcc, NoLock, Preserve)
1930 DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
1932 External (\DEV1, DeviceObj)
1938 Fixed an AML interpreter problem where control method invocations were
1939 not handled correctly when the invocation was itself a SuperName argument
1940 to another ASL operator. In these cases, the method was not invoked.
1941 ACPICA BZ 1002. Affects the following ASL operators that have a SuperName
1946 Decrement, Increment
1949 Signal, Release, Reset
1952 Implemented automatic String-to-ObjectReference conversion support for
1953 packages returned by predefined names (such as _DEP). A common BIOS error
1954 is to add double quotes around an ObjectReference namepath, which turns
1955 the reference into an unexpected string object. This support detects the
1956 problem and corrects it before the package is returned to the caller that
1957 invoked the method. Lv Zheng.
1959 Implemented extensions to the Concatenate operator. Concatenate now
1960 accepts any type of object, it is not restricted to simply
1961 Integer/String/Buffer. For objects other than these 3 basic data types,
1962 the argument is treated as a string containing the name of the object
1963 type. This expands the utility of Concatenate and the Printf/Fprintf
1964 macros. ACPICA BZ 1222.
1966 Cleaned up the output of the ASL Debug object. The timer() value is now
1967 optional and no longer emitted by default. Also, the basic data types of
1968 Integer/String/Buffer are simply emitted as their values, without a data
1969 type string -- since the data type is obvious from the output. ACPICA BZ
1972 Example Code and Data Size: These are the sizes for the OS-independent
1973 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1974 debug version of the code includes the debug output trace mechanism and
1975 has a much larger code and data size.
1978 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
1979 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
1981 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
1982 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
1985 2) iASL Compiler/Disassembler and Tools:
1987 iASL: Fixed some issues with the ASL Include() operator. This operator
1988 was incorrectly defined in the iASL parser rules, causing a new scope to
1989 be opened for the code within the include file. This could lead to
1990 several issues, including allowing ASL code that is technically illegal
1991 and not supported by AML interpreters. Note, this does not affect the
1992 related #include preprocessor operator. ACPICA BZ 1212.
1994 iASL/Disassembler: Implemented support for the ASL ElseIf operator. This
1995 operator is essentially an ASL macro since there is no AML opcode
1996 associated with it. The code emitted by the iASL compiler for ElseIf is
1997 an Else opcode followed immediately by an If opcode. The disassembler
1998 will now emit an ElseIf if it finds an Else immediately followed by an
1999 If. This simplifies the decoded ASL, especially for deeply nested
2000 If..Else and large Switch constructs. Thus, the disassembled code more
2001 closely follows the original source ASL. ACPICA BZ 1211. Example:
2013 ElseIf (Arg0 == 0x02)
2018 AcpiExec: Added support for the new module level code behavior and the
2019 early region installation. This required a small change to the
2020 initialization, since AcpiExec must install its own operation region
2023 AcpiExec: Added support to make the debug object timer optional. Default
2024 is timer disabled. This cleans up the debug object output -- the timer
2025 data is rarely used.
2027 AcpiExec: Multiple ACPI tables are now loaded in the order that they
2028 appear on the command line. This can be important when there are
2029 interdependencies/references between the tables.
2031 iASL/Templates. Add support to generate template files with multiple
2032 SSDTs within a single output file. Also added ommand line support to
2033 specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ
2037 ----------------------------------------
2038 24 November 2015. Summary of changes for version 20151124:
2040 1) ACPICA kernel-resident subsystem:
2042 Fixed a possible regression for a previous update to FADT handling. The
2043 FADT no longer has a fixed table ID, causing some issues with code that
2044 was hardwired to a specific ID. Lv Zheng.
2046 Fixed a problem where the method auto-serialization could interfere with
2047 the current SyncLevel. This change makes the auto-serialization support
2048 transparent to the SyncLevel support and management.
2050 Removed support for the _SUB predefined name in AcpiGetObjectInfo. This
2051 interface is intended for early access to the namespace during the
2052 initial namespace device discovery walk. The _SUB method has been seen to
2053 access operation regions in some cases, causing errors because the
2054 operation regions are not fully initialized.
2056 AML Debugger: Fixed some issues with the terminate/quit/exit commands
2057 that can cause faults. Lv Zheng.
2059 AML Debugger: Add thread ID support so that single-step mode only applies
2060 to the AML Debugger thread. This prevents runtime errors within some
2063 Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx
2064 methods that are invoked by this interface are optional, removed warnings
2065 emitted for the case where one or more of these methods do not exist.
2066 ACPICA BZ 1208, original change by Prarit Bhargava.
2068 Made a major pass through the entire ACPICA source code base to
2069 standardize formatting that has diverged a bit over time. There are no
2070 functional changes, but this will of course cause quite a few code
2071 differences from the previous ACPICA release.
2073 Example Code and Data Size: These are the sizes for the OS-independent
2074 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2075 debug version of the code includes the debug output trace mechanism and
2076 has a much larger code and data size.
2079 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
2080 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
2082 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2083 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
2086 2) iASL Compiler/Disassembler and Tools:
2088 iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple
2089 definition blocks within a single ASL file and the resulting AML file.
2090 Support for this type of file was also added to the various tools that
2091 use binary AML files: acpiexec, acpixtract, and the AML disassembler. The
2092 example code below shows two definition blocks within the same file:
2094 DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template",
2098 DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
2102 iASL: Enhanced typechecking for the Name() operator. All expressions for
2103 the value of the named object must be reduced/folded to a single constant
2104 at compile time, as per the ACPI specification (the AML definition of
2107 iASL: Fixed some code indentation issues for the -ic and -ia options (C
2108 and assembly headers). Now all emitted code correctly begins in column 1.
2110 iASL: Added an error message for an attempt to open a Scope() on an
2111 object defined in an SSDT. The DSDT is always loaded into the namespace
2112 first, so any attempt to open a Scope on an SSDT object will fail at
2116 ----------------------------------------
2117 30 September 2015. Summary of changes for version 20150930:
2119 1) ACPICA kernel-resident subsystem:
2121 Debugger: Implemented several changes and bug fixes to assist support for
2122 the in-kernel version of the AML debugger. Lv Zheng.
2123 - Fix the "predefined" command for in-kernel debugger.
2124 - Do not enter debug command loop for the help and version commands.
2125 - Disallow "execute" command during execution/single-step of a method.
2127 Interpreter: Updated runtime typechecking for all operators that have
2128 target operands. The operand is resolved and validated that it is legal.
2129 For example, the target cannot be a non-data object such as a Device,
2130 Mutex, ThermalZone, etc., as per the ACPI specification.
2132 Debugger: Fixed the double-mutex user I/O handshake to work when local
2133 deadlock detection is enabled.
2135 Debugger: limited display of method locals and arguments (LocalX and
2136 ArgX) to only those that have actually been initialized. This prevents
2137 lines of extraneous output.
2139 Updated the definition of the NFIT table to correct the bit polarity of
2140 one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED
2142 Example Code and Data Size: These are the sizes for the OS-independent
2143 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2144 debug version of the code includes the debug output trace mechanism and
2145 has a much larger code and data size.
2148 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2149 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
2151 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
2152 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
2155 2) iASL Compiler/Disassembler and Tools:
2157 iASL: Improved the compile-time typechecking for operands of many of the
2160 -- Added an option to disable compiler operand/operator typechecking (-
2163 -- For the following operators, the TermArg operands are now validated
2164 when possible to be Integer data objects: BankField, OperationRegion,
2165 DataTableRegion, Buffer, and Package.
2167 -- Store (Source, Target): Both the source and target operands are
2168 resolved and checked that the operands are both legal. For example,
2169 neither operand can be a non-data object such as a Device, Mutex,
2170 ThermalZone, etc. Note, as per the ACPI specification, the CopyObject
2171 operator can be used to store an object to any type of target object.
2173 -- Store (Source, Target): If the source is a Package object, the target
2174 must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target
2175 is a Package, the source must also be a Package.
2177 -- Store (Source, Target): A warning is issued if the source and target
2178 resolve to the identical named object.
2180 -- Store (Source, <method invocation>): An error is generated for the
2181 target method invocation, as this construct is not supported by the AML
2184 -- For all ASL math and logic operators, the target operand must be a
2185 data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This
2186 includes the function return value also.
2188 -- External declarations are also included in the typechecking where
2189 possible. External objects defined using the UnknownObj keyword cannot be
2190 typechecked, however.
2192 iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index
2194 - Legacy code: Index(PKG1, 3)
2195 - New ASL+ code: PKG1[3]
2196 This completes the ACPI 6.0 ASL+ support as it was the only operator not
2199 iASL: Fixed the file suffix for the preprocessor output file (.i). Two
2200 spaces were inadvertently appended to the filename, causing file access
2201 and deletion problems on some systems.
2203 ASL Test Suite (ASLTS): Updated the master makefile to generate all
2204 possible compiler output files when building the test suite -- thus
2205 exercising these features of the compiler. These files are automatically
2206 deleted when the test suite exits.
2209 ----------------------------------------
2210 18 August 2015. Summary of changes for version 20150818:
2212 1) ACPICA kernel-resident subsystem:
2214 Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv
2215 Zheng. ACPICA BZ 1186.
2217 Completed development to ensure that the ACPICA Disassembler and Debugger
2218 are fully standalone components of ACPICA. Removed cross-component
2219 dependences. Lv Zheng.
2221 The max-number-of-AML-loops is now runtime configurable (previously was
2222 compile-time only). This is essentially a loop timeout to force-abort
2223 infinite AML loops. ACPCIA BZ 1192.
2225 Debugger: Cleanup output to dump ACPI names and namepaths without any
2226 trailing underscores. Lv Zheng. ACPICA BZ 1135.
2228 Removed unnecessary conditional compilations across the Debugger and
2229 Disassembler components where entire modules could be left uncompiled.
2231 The aapits test is deprecated and has been removed from the ACPICA git
2232 tree. The test has never been completed and has not been maintained, thus
2233 becoming rather useless. ACPICA BZ 1015, 794.
2235 A batch of small changes to close bugzilla and other reports:
2236 - Remove duplicate code for _PLD processing. ACPICA BZ 1176.
2237 - Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
2238 - iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
2239 - ACPI table support: general cleanup and simplification. Lv Zheng, Bob
2241 - ACPI table support: fix for a buffer read overrun in AcpiTbFindTable.
2243 - Enhance parameter validation for DataTableRegion and LoadTable ASL/AML
2245 - Debugger: Split debugger initialization/termination interfaces. Lv
2247 - AcpiExec: Emit OemTableId for SSDTs during the load phase for table
2249 - AcpiExec: Add debug message during _REG method phase during table
2251 - AcpiNames: Fix a regression where some output was missing and no longer
2253 - Debugger: General cleanup and simplification. Lv Zheng.
2254 - Disassembler: Cleanup use of several global option variables. Lv Zheng.
2256 Example Code and Data Size: These are the sizes for the OS-independent
2257 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2258 debug version of the code includes the debug output trace mechanism and
2259 has a much larger code and data size.
2262 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
2263 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
2265 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2266 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
2269 2) iASL Compiler/Disassembler and Tools:
2271 AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT
2272 were not handled properly and caused load errors. Now, properly invoke
2273 and use the ACPICA auto-reallocate mechanism for ACPI table data
2274 structures. ACPICA BZ 1188
2276 AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA
2279 AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For
2280 AcpiExec, this means that no control methods (like _REG/_INI/_STA) are
2281 executed during initialization. ACPICA BZ 1187, 1189.
2283 iASL/Disassembler: Implemented a prototype "listing" mode that emits AML
2284 that corresponds to each disassembled ASL statement, to simplify
2285 debugging. ACPICA BZ 1191.
2287 Debugger: Add option to the "objects" command to display a summary of the
2288 current namespace objects (Object type and count). This is displayed if
2289 the command is entered with no arguments.
2291 AcpiNames: Add -x option to specify debug level, similar to AcpiExec.
2294 ----------------------------------------
2295 17 July 2015. Summary of changes for version 20150717:
2297 1) ACPICA kernel-resident subsystem:
2299 Improved the partitioning between the Debugger and Disassembler
2300 components. This allows the Debugger to be used standalone within kernel
2301 code without the Disassembler (which is used for single stepping also).
2302 This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.
2304 Debugger: Implemented a new command to trace the execution of control
2305 methods (Trace). This is especially useful for the in-kernel version of
2306 the debugger when file I/O may not be available for method trace output.
2307 See the ACPICA reference for more information. Lv Zheng.
2309 Moved all C library prototypes (used for the local versions of these
2310 functions when requested) to a new header, acclib.h
2311 Cleaned up the use of non-ANSI C library functions. These functions are
2312 implemented locally in ACPICA. Moved all such functions to a common
2313 source file, utnonansi.c
2315 Debugger: Fixed a problem with the "!!" command (get last command
2316 executed) where the debugger could enter an infinite loop and eventually
2319 Removed the use of local macros that were used for some of the standard C
2320 library functions to automatically cast input parameters. This mostly
2321 affected the is* functions where the input parameter is defined to be an
2322 int. This required a few modifications to the main ACPICA source code to
2323 provide casting for these functions and eliminate possible compiler
2324 warnings for these parameters.
2326 Across the source code, added additional status/error checking to resolve
2327 issues discovered by static source code analysis tools such as Coverity.
2329 Example Code and Data Size: These are the sizes for the OS-independent
2330 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2331 debug version of the code includes the debug output trace mechanism and
2332 has a much larger code and data size.
2335 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2336 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
2338 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2339 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
2342 2) iASL Compiler/Disassembler and Tools:
2344 iASL: Fixed a regression where the device map file feature no longer
2345 worked properly when used in conjunction with the disassembler. It only
2346 worked properly with the compiler itself.
2348 iASL: Implemented a new warning for method LocalX variables that are set
2349 but never used (similar to a C compiler such as gcc). This also applies
2350 to ArgX variables that are not defined by the parent method, and are
2351 instead (legally) used as local variables.
2353 iASL/Preprocessor: Finished the pass-through of line numbers from the
2354 preprocessor to the compiler. This ensures that compiler errors/warnings
2355 have the correct original line numbers and filenames, regardless of any
2358 iASL/Preprocessor: Fixed a couple of issues with comment handling and the
2359 pass-through of comments to the preprocessor output file (which becomes
2360 the compiler input file). Also fixed a problem with // comments that
2361 appear after a math expression.
2363 iASL: Added support for the TCPA server table to the table compiler and
2364 template generator. (The client table was already previously supported)
2366 iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to
2367 identify the iASL compiler.
2369 Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined
2370 multiple times. The new names are ACPI_SIGN_NEGATIVE and
2373 AcpiHelp: Update to expand help messages for the iASL preprocessor
2377 ----------------------------------------
2378 19 June 2015. Summary of changes for version 20150619:
2380 Two regressions in version 20150616 have been addressed:
2382 Fixes some problems/issues with the C library macro removal (ACPI_STRLEN,
2383 etc.) This update changes ACPICA to only use the standard headers for
2384 functions, or the prototypes for the local versions of the C library
2385 functions. Across the source code, this required some additional casts
2386 for some Clib invocations for portability. Moved all local prototypes to
2387 a new file, acclib.h
2389 Fixes several problems with recent changes to the handling of the FACS
2390 table that could cause some systems not to boot.
2393 ----------------------------------------
2394 16 June 2015. Summary of changes for version 20150616:
2397 1) ACPICA kernel-resident subsystem:
2399 Across the entire ACPICA source code base, the various macros for the C
2400 library functions (such as ACPI_STRLEN, etc.) have been removed and
2401 replaced by the standard C library names (strlen, etc.) The original
2402 purpose for these macros is no longer applicable. This simplification
2403 reduces the number of macros used in the ACPICA source code
2404 significantly, improving readability and maintainability.
2406 Implemented support for a new ACPI table, the OSDT. This table, the
2407 "override" SDT, can be loaded directly by the host OS at boot time. It
2408 enables the replacement of existing namespace objects that were installed
2409 via the DSDT and/or SSDTs. The primary purpose for this is to replace
2410 buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated
2411 for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob
2414 Added support for systems with (improperly) two FACS tables -- a "32-bit"
2415 table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit
2416 X field). This change will support both automatically. There continues to
2417 be systems found with this issue. This support requires a change to the
2418 AcpiSetFirmwareWakingVector interface. Also, a public global variable has
2419 been added to allow the host to select which FACS is desired
2420 (AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more
2423 Added a new feature to allow for systems that do not contain an FACS.
2424 Although this is already supported on hardware-reduced platforms, the
2425 feature has been extended for all platforms. The reasoning is that we do
2426 not want to abort the entire ACPICA initialization just because the
2427 system is seriously buggy and has no FACS.
2429 Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were
2430 not correctly transcribed from the ACPI specification in ACPICA version
2433 Implemented support for the _CLS object in the AcpiGetObjectInfo external
2436 Updated the definitions of the TCPA and TPM2 ACPI tables to the more
2437 recent TCG ACPI Specification, December 14, 2014. Table disassembler and
2438 compiler also updated. Note: The TCPA "server" table is not supported by
2439 the disassembler/table-compiler at this time.
2441 ACPI 6.0: Added definitions for the new GIC version field in the MADT.
2443 Example Code and Data Size: These are the sizes for the OS-independent
2444 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2445 debug version of the code includes the debug output trace mechanism and
2446 has a much larger code and data size.
2449 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2450 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
2452 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
2453 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
2456 2) iASL Compiler/Disassembler and Tools:
2458 Disassembler: Fixed a problem with the new symbolic operator disassembler
2459 where incorrect ASL code could be emitted in some cases for the "non-
2460 commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and
2461 ShiftRight. The actual problem cases seem to be rather unusual in common
2462 ASL code, however. David Box.
2464 Modified the linux version of acpidump to obtain ACPI tables from not
2465 just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv
2468 iASL: Fixed a problem where the user preprocessor output file (.i)
2469 contained extra data that was not expected. The compiler was using this
2470 file as a temporary file and passed through #line directives in order to
2471 keep compiler error messages in sync with the input file and line number
2472 across multiple include files. The (.i) is no longer a temporary file as
2473 the compiler uses a new, different file for the original purpose.
2475 iASL: Fixed a problem where comments within the original ASL source code
2476 file were not passed through to the preprocessor output file, nor any
2479 iASL: Fixed some issues for the handling of the "#include" preprocessor
2480 directive and the similar (but not the same) "Include" ASL operator.
2482 iASL: Add support for the new OSDT in both the disassembler and compiler.
2484 iASL: Fixed a problem with the constant folding support where a Buffer
2485 object could be incorrectly generated (incorrectly formed) during a
2486 conversion to a Store() operator.
2488 AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new
2489 description text for the _REV predefined name. _REV now permanently
2490 returns 2, as per the ACPI 6.0 specification.
2492 Debugger: Enhanced the output of the Debug ASL object for references
2493 produced by the Index operator. For Buffers and strings, only output the
2494 actual byte pointed to by the index. For packages, only print the single
2495 package element decoded by the index. Previously, the entire
2496 buffer/string/package was emitted.
2498 iASL/Table-compiler: Fixed a regression where the "generic" data types
2499 were no longer recognized, causing errors.
2502 ----------------------------------------
2503 15 May 2015. Summary of changes for version 20150515:
2505 This release implements most of ACPI 6.0 as described below.
2507 1) ACPICA kernel-resident subsystem:
2509 Implemented runtime argument checking and return value checking for all
2510 new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI,
2511 _MTL, _PRR, _RDI, _RST, _TFP, _TSN.
2513 Example Code and Data Size: These are the sizes for the OS-independent
2514 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2515 debug version of the code includes the debug output trace mechanism and
2516 has a much larger code and data size.
2519 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
2520 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
2522 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
2523 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
2526 2) iASL Compiler/Disassembler and Tools:
2528 iASL compiler: Added compile-time support for all new ACPI 6.0 predefined
2529 names (argument count validation and return value typechecking.)
2531 iASL disassembler and table compiler: implemented support for all new
2532 ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV.
2534 iASL disassembler and table compiler: Added ACPI 6.0 changes to existing
2537 iASL preprocessor: Added a new directive to enable inclusion of binary
2538 blobs into ASL code. The new directive is #includebuffer. It takes a
2539 binary file as input and emits a named ascii buffer object into the ASL
2542 AcpiHelp: Added support for all new ACPI 6.0 predefined names.
2544 AcpiHelp: Added a new option, -d, to display all iASL preprocessor
2547 AcpiHelp: Added a new option, -t, to display all known/supported ACPI
2551 ----------------------------------------
2552 10 April 2015. Summary of changes for version 20150410:
2554 Reverted a change introduced in version 20150408 that caused
2555 a regression in the disassembler where incorrect operator
2556 symbols could be emitted.
2559 ----------------------------------------
2560 08 April 2015. Summary of changes for version 20150408:
2563 1) ACPICA kernel-resident subsystem:
2565 Permanently set the return value for the _REV predefined name. It now
2566 returns 2 (was 5). This matches other ACPI implementations. _REV will be
2567 deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2
2568 for ACPI 2.0 and later. It should never be used to differentiate or
2569 identify operating systems.
2571 Added the "Windows 2015" string to the _OSI support. ACPICA will now
2572 return TRUE to a query with this string.
2574 Fixed several issues with the local version of the printf function.
2576 Added the C99 compiler option (-std=c99) to the Unix makefiles.
2579 Non-Debug Version: 99.9K Code, 27.4K Data, 127.3K Total
2580 Debug Version: 195.2K Code, 80.7K Data, 275.9K Total
2582 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
2583 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
2586 2) iASL Compiler/Disassembler and Tools:
2588 iASL: Implemented an enhancement to the constant folding feature to
2589 transform the parse tree to a simple Store operation whenever possible:
2590 Add (2, 3, X) ==> is converted to: Store (5, X)
2591 X = 2 + 3 ==> is converted to: Store (5, X)
2593 Updated support for the SLIC table (Software Licensing Description Table)
2594 in both the Data Table compiler and the disassembler. The SLIC table
2595 support now conforms to "Microsoft Software Licensing Tables (SLIC and
2596 MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data
2597 following the ACPI header is now defined to be "Proprietary Data", and as
2598 such, can only be entered or displayed as a hex data block.
2600 Implemented full support for the MSDM table as described in the document
2601 above. Note: The format of MSDM is similar to SLIC. Any MSDM data
2602 following the ACPI header is defined to be "Proprietary Data", and can
2603 only be entered or displayed as a hex data block.
2605 Implemented the -Pn option for the iASL Table Compiler (was only
2606 implemented for the ASL compiler). This option disables the iASL
2609 Disassembler: For disassembly of Data Tables, added a comment field
2610 around the Ascii equivalent data that is emitted as part of the "Raw
2611 Table Data" block. This prevents the iASL Preprocessor from possible
2612 confusion if/when the table is compiled.
2614 Disassembler: Added an option (-df) to force the disassembler to assume
2615 that the table being disassembled contains valid AML. This feature is
2616 useful for disassembling AML files that contain ACPI signatures other
2617 than DSDT or SSDT (such as OEMx or other signatures).
2619 Changes for the EFI version of the tools:
2620 1) Fixed a build error/issue
2621 2) Fixed a cast warning
2623 iASL: Fixed a path issue with the __FILE__ operator by making the
2624 directory prefix optional within the internal SplitInputFilename
2627 Debugger: Removed some unused global variables.
2629 Tests: Updated the makefile for proper generation of the AAPITS suite.
2632 ----------------------------------------
2633 04 February 2015. Summary of changes for version 20150204:
2635 ACPICA kernel-resident subsystem:
2637 Updated all ACPICA copyrights and signons to 2014. Added the 2014
2638 copyright to all module headers and signons, including the standard Linux
2639 header. This affects virtually every file in the ACPICA core subsystem,
2640 iASL compiler, all ACPICA utilities, and the test suites.
2642 Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
2643 A raw gpe handling mechanism was created to allow better handling of GPE
2644 storms that aren't easily managed by the normal handler. The raw handler
2645 allows disabling/renabling of the the GPE so that interrupt storms can be
2646 avoided in cases where events cannot be timely serviced. In this
2647 scenario, handlers should use the AcpiSetGpe() API to disable/enable the
2648 GPE. This API will leave the reference counts undisturbed, thereby
2649 preventing unintentional clearing of the GPE when the intent in only to
2650 temporarily disable it. Raw handlers allow enabling and disabling of a
2651 GPE by removing GPE register locking. As such, raw handlers much provide
2652 their own locks while using GPE API's to protect access to GPE data
2656 Events: Always modify GPE registers under the GPE lock.
2657 Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
2658 values. Reported as bug by joe.liu@apple.com.
2660 Unix makefiles: Separate option to disable optimizations and
2661 _FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the
2662 NOOPT disable option and creates a separate flag (NOFORTIFY) for this
2663 purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined
2664 errors when building ACPICA. This allows disabling the option without
2665 also having to disable optimazations.
2669 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2670 Debug Version: 199.2K Code, 82.4K Data, 281.6K Total
2673 --------------------------------------
2674 07 November 2014. Summary of changes for version 20141107:
2676 This release is available at https://acpica.org/downloads
2678 This release introduces and implements language extensions to ASL that
2679 provide support for symbolic ("C-style") operators and expressions. These
2680 language extensions are known collectively as ASL+.
2683 1) iASL Compiler/Disassembler and Tools:
2685 Disassembler: Fixed a problem with disassembly of the UartSerialBus
2686 macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E.
2689 Disassembler: Fixed the Unicode macro support to add escape sequences.
2690 All non-printable ASCII values are emitted as escape sequences, as well
2691 as the standard escapes for quote and backslash. Ensures that the
2692 disassembled macro can be correctly recompiled.
2694 iASL: Added Printf/Fprintf macros for formatted output. These macros are
2695 translated to existing AML Concatenate and Store operations. Printf
2696 writes to the ASL Debug object. Fprintf allows the specification of an
2697 ASL name as the target. Only a single format specifier is required, %o,
2698 since the AML interpreter dynamically converts objects to the required
2701 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
2702 (Concatenate (Concatenate (Concatenate ("", Arg0),
2703 ": Unexpected value for "), Arg1), ", "), Arg2),
2704 " at line "), Arg3), Debug)
2706 (new) Printf ("%o: Unexpected value for %o, %o at line %o",
2707 Arg0, Arg1, Arg2, Arg3)
2709 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
2710 ("", Arg1), ": "), Arg0), " Successful"), STR1)
2712 (new) Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)
2714 iASL: Added debug options (-bp, -bt) to dynamically prune levels of the
2715 ASL parse tree before the AML code is generated. This allows blocks of
2716 ASL code to be removed in order to help locate and identify problem
2717 devices and/or code. David E. Box.
2719 AcpiExec: Added support (-fi) for an optional namespace object
2720 initialization file. This file specifies initial values for namespace
2721 objects as necessary for debugging and testing different ASL code paths
2722 that may be taken as a result of BIOS options.
2725 2) Overview of symbolic operator support for ASL (ASL+)
2726 -------------------------------------------------------
2728 As an extension to the ASL language, iASL implements support for symbolic
2729 (C-style) operators for math and logical expressions. This can greatly
2730 simplify ASL code as well as improve both readability and
2731 maintainability. These language extensions can exist concurrently with
2732 all legacy ASL code and expressions.
2734 The symbolic extensions are 100% compatible with existing AML
2735 interpreters, since no new AML opcodes are created. To implement the
2736 extensions, the iASL compiler transforms the symbolic expressions into
2737 the legacy ASL/AML equivalents at compile time.
2739 Full symbolic expressions are supported, along with the standard C
2740 precedence and associativity rules.
2742 Full disassembler support for the symbolic expressions is provided, and
2743 creates an automatic migration path for existing ASL code to ASL+ code
2744 via the disassembly process. By default, the disassembler now emits ASL+
2745 code with symbolic expressions. An option (-dl) is provided to force the
2746 disassembler to emit legacy ASL code if desired.
2748 Below is the complete list of the currently supported symbolic operators
2749 with examples. See the iASL User Guide for additional information.
2752 ASL+ Syntax Legacy ASL Equivalent
2753 ----------- ---------------------
2757 Z = X + Y Add (X, Y, Z)
2758 Z = X - Y Subtract (X, Y, Z)
2759 Z = X * Y Multiply (X, Y, Z)
2760 Z = X / Y Divide (X, Y, , Z)
2761 Z = X % Y Mod (X, Y, Z)
2762 Z = X << Y ShiftLeft (X, Y, Z)
2763 Z = X >> Y ShiftRight (X, Y, Z)
2764 Z = X & Y And (X, Y, Z)
2765 Z = X | Y Or (X, Y, Z)
2766 Z = X ^ Y Xor (X, Y, Z)
2771 // Logical operators
2773 (X == Y) LEqual (X, Y)
2774 (X != Y) LNotEqual (X, Y)
2775 (X < Y) LLess (X, Y)
2776 (X > Y) LGreater (X, Y)
2777 (X <= Y) LLessEqual (X, Y)
2778 (X >= Y) LGreaterEqual (X, Y)
2779 (X && Y) LAnd (X, Y)
2783 // Assignment and compound assignment operations
2786 X += Y Add (X, Y, X)
2787 X -= Y Subtract (X, Y, X)
2788 X *= Y Multiply (X, Y, X)
2789 X /= Y Divide (X, Y, , X)
2790 X %= Y Mod (X, Y, X)
2791 X <<= Y ShiftLeft (X, Y, X)
2792 X >>= Y ShiftRight (X, Y, X)
2793 X &= Y And (X, Y, X)
2795 X ^= Y Xor (X, Y, X)
2802 If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
2803 And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530,
2805 0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
2807 And (MEMB, 0xFFFFFFF0, SRMB)
2808 Store (MEMB, Local2)
2809 Store (PDBM, Local1)
2810 And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
2812 Or (PDBM, 0x02, PDBM)
2816 If (((R510 & 0x03FB) == 0x02E0) ||
2817 ((R520 & 0x03FB) == 0x02E0) ||
2818 ((R530 & 0x03FB) == 0x02E0) ||
2819 ((R540 & 0x03FB) == 0x02E0))
2821 SRMB = (MEMB & 0xFFFFFFF0)
2824 PDBM &= 0xFFFFFFFFFFFFFFF9
2830 Store (0x1234, Local1)
2831 Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
2832 Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
2833 Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
2834 Store (Index (PKG1, 0x03), Local6)
2835 Store (Add (Local3, Local2), Debug)
2836 Add (Local1, 0x0F, Local2)
2837 Add (Local1, Multiply (Local2, Local3), Local2)
2838 Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)
2842 Local3 = (((Local1 + TEST) + 0x20) * Local2)
2843 Local3 = (Local2 * ((Local1 + TEST) + 0x20))
2844 Local3 = (Local1 + (TEST + (0x20 * Local2)))
2845 Local6 = Index (PKG1, 0x03)
2846 Debug = (Local3 + Local2)
2847 Local2 = (Local1 + 0x0F)
2848 Local2 = (Local1 + (Local2 * Local3))
2849 Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))
2852 ----------------------------------------
2853 26 September 2014. Summary of changes for version 20140926:
2855 1) ACPICA kernel-resident subsystem:
2857 Updated the GPIO operation region handler interface (GeneralPurposeIo).
2858 In order to support GPIO Connection objects with multiple pins, along
2859 with the related Field objects, the following changes to the interface
2860 have been made: The Address is now defined to be the offset in bits of
2861 the field unit from the previous invocation of a Connection. It can be
2862 viewed as a "Pin Number Index" into the connection resource descriptor.
2863 The BitWidth is the exact bit width of the field. It is usually one bit,
2864 but not always. See the ACPICA reference guide (section 8.8.6.2.1) for
2865 additional information and examples.
2867 GPE support: During ACPICA/GPE initialization, ensure that all GPEs with
2868 corresponding _Lxx/_Exx methods are disabled (they may have been enabled
2869 by the firmware), so that they cannot fire until they are enabled via
2870 AcpiUpdateAllGpes. Rafael J. Wysocki.
2872 Added a new return flag for the Event/GPE status interfaces --
2873 AcpiGetEventStatus and AcpiGetGpeStatus. The new
2874 ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or
2875 GPE currently has a handler associated with it, and can thus actually
2876 affect the system. Lv Zheng.
2878 Example Code and Data Size: These are the sizes for the OS-independent
2879 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2880 debug version of the code includes the debug output trace mechanism and
2881 has a much larger code and data size.
2884 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
2885 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
2887 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
2888 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
2890 2) iASL Compiler/Disassembler and Tools:
2892 iASL: Fixed a memory allocation/free regression introduced in 20140828
2893 that could cause the compiler to crash. This was introduced inadvertently
2894 during the effort to eliminate compiler memory leaks. ACPICA BZ 1111,
2897 iASL: Removed two error messages that have been found to create false
2898 positives, until they can be fixed and fully validated (ACPICA BZ 1112):
2899 1) Illegal forward reference within a method
2900 2) Illegal reference across two methods
2902 iASL: Implemented a new option (-lm) to create a hardware mapping file
2903 that summarizes all GPIO, I2C, SPI, and UART connections. This option
2904 works for both the compiler and disassembler. See the iASL compiler user
2905 guide for additional information and examples (section 6.4.6).
2907 AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to
2908 version 2. This corrects the AE_BAD_HEADER exception seen on systems with
2909 a version 1 RSDP. Lv Zheng ACPICA BZ 1097.
2911 AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode
2912 unless STDIN is actually a terminal. Assists with batch-mode processing.
2915 Disassembler/AcpiHelp: Added another large group of recognized _HID
2919 ----------------------------------------
2920 28 August 2014. Summary of changes for version 20140828:
2922 1) ACPICA kernel-resident subsystem:
2924 Fixed a problem related to the internal use of the Timer() operator where
2925 a 64-bit divide could cause an attempted link to a double-precision math
2926 library. This divide is not actually necessary, so the code was
2927 restructured to eliminate it. Lv Zheng.
2929 ACPI 5.1: Added support for the runtime validation of the _DSD package
2930 (similar to the iASL support).
2932 ACPI 5.1/Headers: Added support for the GICC affinity subtable to the
2933 SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.
2935 Example Code and Data Size: These are the sizes for the OS-independent
2936 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2937 debug version of the code includes the debug output trace mechanism and
2938 has a much larger code and data size.
2941 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
2942 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
2944 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total1
2945 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
2947 2) iASL Compiler/Disassembler and Tools:
2949 AcpiExec: Fixed a problem on unix systems where the original terminal
2950 state was not always properly restored upon exit. Seen when using the -v
2951 option. ACPICA BZ 1104.
2953 iASL: Fixed a problem with the validation of the ranges/length within the
2954 Memory24 resource descriptor. There was a boundary condition when the
2955 range was equal to the (length -1) caused by the fact that these values
2956 are defined in 256-byte blocks, not bytes. ACPICA BZ 1098
2958 Disassembler: Fixed a problem with the GpioInt descriptor interrupt
2960 flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword
2962 now supported properly.
2964 ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported
2965 in the disassembler, data table compiler, and table template generator.
2967 iASL: Added a requirement for Device() objects that one of either a _HID
2968 or _ADR must exist within the scope of a Device, as per the ACPI
2969 specification. Remove a similar requirement that was incorrectly in place
2970 for the _DSD object.
2972 iASL: Added error detection for illegal named references within control
2973 methods that would cause runtime failures. Now trapped as errors are: 1)
2974 References to objects within a non-parent control method. 2) Forward
2975 references (within a method) -- for control methods, AML interpreters use
2976 a one-pass parse of control methods. ACPICA BZ 1008.
2978 iASL: Added error checking for dependencies related to the _PSx power
2979 methods. ACPICA BZ 1029.
2980 1) For _PS0, one of these must exist within the same scope: _PS1, _PS2,
2982 2) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same
2985 iASL and table compiler: Cleanup miscellaneous memory leaks by fully
2986 deploying the existing object and string caches and adding new caches for
2989 iASL: Split the huge parser source file into multiple subfiles to improve
2990 manageability. Generation now requires the M4 macro preprocessor, which
2991 is part of the Bison distribution on both unix and windows platforms.
2993 AcpiSrc: Fixed and removed all extraneous warnings generated during
2994 entire ACPICA source code scan and/or conversion.
2997 ----------------------------------------
2999 24 July 2014. Summary of changes for version 20140724:
3001 The ACPI 5.1 specification has been released and is available at:
3002 http://uefi.org/specs/access
3005 0) ACPI 5.1 support in ACPICA:
3007 ACPI 5.1 is fully supported in ACPICA as of this release.
3009 New predefined names. Support includes iASL and runtime ACPICA
3011 _CCA (Cache Coherency Attribute).
3012 _DSD (Device-Specific Data). David Box.
3014 Modifications to existing ACPI tables. Support includes headers, iASL
3015 Data Table compiler, disassembler, and the template generator.
3016 FADT - New fields and flags. Graeme Gregory.
3017 GTDT - One new subtable and new fields. Tomasz Nowicki.
3018 MADT - Two new subtables. Tomasz Nowicki.
3019 PCCT - One new subtable.
3022 New notification type for System Resource Affinity change events.
3025 1) ACPICA kernel-resident subsystem:
3027 Fixed a regression introduced in 20140627 where a fault can happen during
3028 the deletion of Alias AML namespace objects. The problem affected both
3029 the core ACPICA and the ACPICA tools including iASL and AcpiExec.
3031 Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a
3032 simple mechanism to enable wake GPEs that have no associated handler or
3033 control method. Rafael Wysocki.
3035 Updated the AcpiEnableGpe interface to disallow the enable if there is no
3036 handler or control method associated with the particular GPE. This will
3037 help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
3039 Updated GPE handling and dispatch by disabling the GPE before clearing
3040 the status bit for edge-triggered GPEs. Lv Zheng.
3042 Added Timer() support to the AML Debug object. The current timer value is
3043 now displayed with each invocation of (Store to) the debug object to
3044 enable simple generation of execution times for AML code (method
3045 execution for example.) ACPICA BZ 1093.
3047 Example Code and Data Size: These are the sizes for the OS-independent
3048 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3049 debug version of the code includes the debug output trace mechanism and
3050 has a much larger code and data size.
3053 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total
3054 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
3056 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
3057 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
3060 2) iASL Compiler/Disassembler and Tools:
3062 Fixed an issue with the recently added local printf implementation,
3063 concerning width/precision specifiers that could cause incorrect output.
3064 Lv Zheng. ACPICA BZ 1094.
3066 Disassembler: Added support to detect buffers that contain UUIDs and
3067 disassemble them to an invocation of the ToUUID operator. Also emit
3068 commented descriptions of known ACPI-related UUIDs.
3070 AcpiHelp: Added support to display known ACPI-related UUIDs. New option,
3071 -u. Adds three new files.
3073 iASL: Update table compiler and disassembler for DMAR table changes that
3074 were introduced in September 2013. With assistance by David Woodhouse.
3076 ----------------------------------------
3077 27 June 2014. Summary of changes for version 20140627:
3079 1) ACPICA kernel-resident subsystem:
3081 Formatted Output: Implemented local versions of standard formatted output
3082 utilities such as printf, etc. Over time, it has been discovered that
3083 there are in fact many portability issues with printf, and the addition
3084 of this feature will fix/prevent these issues once and for all. Some
3085 known issues are summarized below:
3087 1) Output of 64-bit values is not portable. For example, UINT64 is %ull
3088 for the Linux kernel and is %uI64 for some MSVC versions.
3089 2) Invoking printf consistently in a manner that is portable across both
3090 32-bit and 64-bit platforms is difficult at best in many situations.
3091 3) The output format for pointers varies from system to system (leading
3092 zeros especially), and leads to inconsistent output from ACPICA across
3094 4) Certain platform-specific printf formats may conflict with ACPICA use.
3095 5) If there is no local C library available, ACPICA now has local support
3098 -- To address these printf issues in a complete manner, ACPICA now
3099 directly implements a small subset of printf format specifiers, only
3100 those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
3102 Implemented support for ACPICA generation within the EFI environment.
3103 Initially, the AcpiDump utility is supported in the UEFI shell
3104 environment. Lv Zheng.
3106 Added a new external interface, AcpiLogError, to improve ACPICA
3107 portability. This allows the host to redirect error messages from the
3108 ACPICA utilities. Lv Zheng.
3110 Added and deployed new OSL file I/O interfaces to improve ACPICA
3118 There are C library implementations of these functions in the new file
3119 service_layers/oslibcfs.c -- however, the functions can be implemented by
3120 the local host in any way necessary. Lv Zheng.
3122 Implemented a mechanism to disable/enable ACPI table checksum validation
3123 at runtime. This can be useful when loading tables very early during OS
3124 initialization when it may not be possible to map the entire table in
3125 order to compute the checksum. Lv Zheng.
3127 Fixed a buffer allocation issue for the Generic Serial Bus support.
3128 Originally, a fixed buffer length was used. This change allows for
3129 variable-length buffers based upon the protocol indicated by the field
3130 access attributes. Reported by Lan Tianyu. Lv Zheng.
3132 Fixed a problem where an object detached from a namespace node was not
3133 properly terminated/cleared and could cause a circular list problem if
3134 reattached. ACPICA BZ 1063. David Box.
3136 Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
3138 Fixed a possible memory leak in an error return path within the function
3139 AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
3141 Example Code and Data Size: These are the sizes for the OS-independent
3142 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3143 debug version of the code includes the debug output trace mechanism and
3144 has a much larger code and data size.
3147 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
3148 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
3150 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
3151 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
3154 2) iASL Compiler/Disassembler and Tools:
3156 Disassembler: Add dump of ASCII equivalent text within a comment at the
3157 end of each line of the output for the Buffer() ASL operator.
3159 AcpiDump: Miscellaneous changes:
3160 Fixed repetitive table dump in -n mode.
3161 For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
3162 the ACPI 2.0 GUID fails.
3164 iASL: Fixed a problem where the compiler could fault if incorrectly given
3165 an acpidump output file as input. ACPICA BZ 1088. David Box.
3167 AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
3168 they are invoked without any arguments.
3170 Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
3171 1086. Colin Ian King.
3173 Disassembler: Cleaned up a block of code that extracts a parent Op
3174 object. Added a comment that explains that the parent is guaranteed to be
3175 valid in this case. ACPICA BZ 1069.
3178 ----------------------------------------
3179 24 April 2014. Summary of changes for version 20140424:
3181 1) ACPICA kernel-resident subsystem:
3183 Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
3184 Some of these tables are known to contain a trailing NULL entry. Lv
3187 Removed an extraneous error message for the case where there are a large
3188 number of system GPEs (> 124). This was the "32-bit FADT register is too
3189 long to convert to GAS struct" message, which is irrelevant for GPEs
3190 since the GPEx_BLK_LEN fields of the FADT are always used instead of the
3191 (limited capacity) GAS bit length. Also, several changes to ensure proper
3192 support for GPE numbers > 255, where some "GPE number" fields were 8-bits
3195 Implemented and deployed additional configuration support for the public
3196 ACPICA external interfaces. Entire classes of interfaces can now be
3197 easily modified or configured out, replaced by stubbed inline functions
3198 by default. Lv Zheng.
3200 Moved all public ACPICA runtime configuration globals to the public
3201 ACPICA external interface file for convenience. Also, removed some
3202 obsolete/unused globals. See the file acpixf.h. Lv Zheng.
3204 Documentation: Added a new section to the ACPICA reference describing the
3205 maximum number of GPEs that can be supported by the FADT-defined GPEs in
3206 block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
3209 Example Code and Data Size: These are the sizes for the OS-independent
3210 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3211 debug version of the code includes the debug output trace mechanism and
3212 has a much larger code and data size.
3215 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
3216 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
3218 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
3219 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
3222 2) iASL Compiler/Disassembler and Tools:
3224 iASL and disassembler: Add full support for the LPIT table (Low Power
3225 Idle Table). Includes support in the disassembler, data table compiler,
3226 and template generator.
3229 1) Add option to force the use of the RSDT (over the XSDT).
3230 2) Improve validation of the RSDP signature (use 8 chars instead of 4).
3232 iASL: Add check for predefined packages that are too large. For
3233 predefined names that contain subpackages, check if each subpackage is
3234 too large. (Check for too small already exists.)
3236 Debugger: Updated the GPE command (which simulates a GPE by executing the
3237 GPE code paths in ACPICA). The GPE device is now optional, and defaults
3238 to the GPE 0/1 FADT-defined blocks.
3240 Unix application OSL: Update line-editing support. Add additional error
3241 checking and take care not to reset terminal attributes on exit if they
3242 were never set. This should help guarantee that the terminal is always
3243 left in the previous state on program exit.
3246 ----------------------------------------
3247 25 March 2014. Summary of changes for version 20140325:
3249 1) ACPICA kernel-resident subsystem:
3251 Updated the auto-serialize feature for control methods. This feature
3252 automatically serializes all methods that create named objects in order
3253 to prevent runtime errors. The update adds support to ignore the
3254 currently executing AML SyncLevel when invoking such a method, in order
3255 to prevent disruption of any existing SyncLevel priorities that may exist
3256 in the AML code. Although the use of SyncLevels is relatively rare, this
3257 change fixes a regression where an AE_AML_MUTEX_ORDER exception can
3258 appear on some machines starting with the 20140214 release.
3260 Added a new external interface to allow the host to install ACPI tables
3261 very early, before the namespace is even created. AcpiInstallTable gives
3262 the host additional flexibility for ACPI table management. Tables can be
3263 installed directly by the host as if they had originally appeared in the
3264 XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
3265 (anything except the DSDT and FACS). Adds a new file, tbdata.c, along
3266 with additional internal restructuring and cleanup. See the ACPICA
3267 Reference for interface details. Lv Zheng.
3269 Added validation of the checksum for all incoming dynamically loaded
3270 tables (via external interfaces or via AML Load/LoadTable operators). Lv
3273 Updated the use of the AcpiOsWaitEventsComplete interface during Notify
3274 and GPE handler removal. Restructured calls to eliminate possible race
3275 conditions. Lv Zheng.
3277 Added a warning for the use/execution of the ASL/AML Unload (table)
3278 operator. This will help detect and identify machines that use this
3279 operator if and when it is ever used. This operator has never been seen
3280 in the field and the usage model and possible side-effects of the drastic
3281 runtime action of a full table removal are unknown.
3283 Reverted the use of #pragma push/pop which was introduced in the 20140214
3284 release. It appears that push and pop are not implemented by enough
3285 compilers to make the use of this feature feasible for ACPICA at this
3286 time. However, these operators may be deployed in a future ACPICA
3289 Added the missing EXPORT_SYMBOL macros for the install and remove SCI
3292 Source code generation:
3293 1) Disabled the use of the "strchr" macro for the gcc-specific
3294 generation. For some versions of gcc, this macro can periodically expose
3295 a compiler bug which in turn causes compile-time error(s).
3296 2) Added support for PPC64 compilation. Colin Ian King.
3298 Example Code and Data Size: These are the sizes for the OS-independent
3299 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3300 debug version of the code includes the debug output trace mechanism and
3301 has a much larger code and data size.
3304 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
3305 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
3307 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
3308 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
3311 2) iASL Compiler/Disassembler and Tools:
3313 Disassembler: Added several new features to improve the readability of
3314 the resulting ASL code. Extra information is emitted within comment
3315 fields in the ASL code:
3316 1) Known _HID/_CID values are decoded to descriptive text.
3317 2) Standard values for the Notify() operator are decoded to descriptive
3319 3) Target operands are expanded to full pathnames (in a comment) when
3322 Disassembler: Miscellaneous updates for extern() handling:
3323 1) Abort compiler if file specified by -fe option does not exist.
3324 2) Silence unnecessary warnings about argument count mismatches.
3325 3) Update warning messages concerning unresolved method externals.
3326 4) Emit "UnknownObj" keyword for externals whose type cannot be
3330 1) Added the -a option to display both the ASL syntax and the AML
3331 encoding for an input ASL operator. This effectively displays all known
3332 information about an ASL operator with one AcpiHelp invocation.
3333 2) Added substring match support (similar to a wildcard) for the -i
3334 (_HID/PNP IDs) option.
3336 iASL/Disassembler: Since this tool does not yet support execution on big-
3337 endian machines, added detection of endianness and an error message if
3338 execution is attempted on big-endian. Support for big-endian within iASL
3339 is a feature that is on the ACPICA to-be-done list.
3342 1) Remove option to extract binary files from an acpidump; this function
3343 is made obsolete by the AcpiXtract utility.
3344 2) General cleanup of open files and allocated buffers.
3347 ----------------------------------------
3348 14 February 2014. Summary of changes for version 20140214:
3350 1) ACPICA kernel-resident subsystem:
3352 Implemented a new mechanism to proactively prevent problems with ill-
3353 behaved reentrant control methods that create named ACPI objects. This
3354 behavior is illegal as per the ACPI specification, but is nonetheless
3355 frequently seen in the field. Previously, this could lead to an
3356 AE_ALREADY_EXISTS exception if the method was actually entered by more
3357 than one thread. This new mechanism detects such methods at table load
3358 time and marks them "serialized" to prevent reentrancy. A new global
3359 option, AcpiGbl_AutoSerializeMethods, has been added to disable this
3360 feature if desired. This mechanism and global option obsoletes and
3361 supersedes the previous AcpiGbl_SerializeAllMethods option.
3363 Added the "Windows 2013" string to the _OSI support. ACPICA will now
3364 respond TRUE to _OSI queries with this string. It is the stated policy of
3365 ACPICA to add new strings to the _OSI support as soon as possible after
3366 they are defined. See the full ACPICA _OSI policy which has been added to
3367 the utilities/utosi.c file.
3369 Hardened/updated the _PRT return value auto-repair code:
3370 1) Do not abort the repair on a single subpackage failure, continue to
3371 check all subpackages.
3372 2) Add check for the minimum subpackage length (4).
3373 3) Properly handle extraneous NULL package elements.
3375 Added support to avoid the possibility of infinite loops when traversing
3376 object linked lists. Never allow an infinite loop, even in the face of
3377 corrupted object lists.
3379 ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
3380 pack(pop) directives to ensure that the ACPICA headers are independent of
3381 compiler settings or other host headers.
3383 Example Code and Data Size: These are the sizes for the OS-independent
3384 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3385 debug version of the code includes the debug output trace mechanism and
3386 has a much larger code and data size.
3389 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
3390 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
3392 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
3393 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
3396 2) iASL Compiler/Disassembler and Tools:
3398 iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
3399 first reserved field was incorrectly forced to have a value of zero. This
3400 change correctly forces the field to have a value of one. ACPICA BZ 1081.
3402 Debugger: Added missing support for the "Extra" and "Data" subobjects
3403 when displaying object data.
3405 Debugger: Added support to display entire object linked lists when
3406 displaying object data.
3408 iASL: Removed the obsolete -g option to obtain ACPI tables from the
3409 Windows registry. This feature has been superseded by the acpidump
3413 ----------------------------------------
3414 14 January 2014. Summary of changes for version 20140114:
3416 1) ACPICA kernel-resident subsystem:
3418 Updated all ACPICA copyrights and signons to 2014. Added the 2014
3419 copyright to all module headers and signons, including the standard Linux
3420 header. This affects virtually every file in the ACPICA core subsystem,
3421 iASL compiler, all ACPICA utilities, and the test suites.
3423 Improved parameter validation for AcpiInstallGpeBlock. Added the
3425 1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
3426 2) There is not already a GPE block attached to the device.
3427 Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
3430 Correctly support "references" in the ACPI_OBJECT. This change fixes the
3431 support to allow references (namespace nodes) to be passed as arguments
3432 to control methods via the evaluate object interface. This is probably
3433 most useful for testing purposes, however.
3435 Improved support for 32/64 bit physical addresses in printf()-like
3436 output. This change improves the support for physical addresses in printf
3437 debug statements and other output on both 32-bit and 64-bit hosts. It
3438 consistently outputs the appropriate number of bytes for each host. The
3439 %p specifier is unsatisfactory since it does not emit uniform output on
3440 all hosts/clib implementations (on some, leading zeros are not supported,
3441 leading to difficult-to-read output).
3443 Example Code and Data Size: These are the sizes for the OS-independent
3444 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3445 debug version of the code includes the debug output trace mechanism and
3446 has a much larger code and data size.
3449 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
3450 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
3452 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
3453 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
3456 2) iASL Compiler/Disassembler and Tools:
3458 iASL: Fix a possible fault when using the Connection() operator. Fixes a
3459 problem if the parent Field definition for the Connection operator refers
3460 to an operation region that does not exist. ACPICA BZ 1064.
3462 AcpiExec: Load of local test tables is now optional. The utility has the
3463 capability to load some various tables to test features of ACPICA.
3464 However, there are enough of them that the output of the utility became
3465 confusing. With this change, only the required local tables are displayed
3466 (RSDP, XSDT, etc.) along with the actual tables loaded via the command
3467 line specification. This makes the default output simler and easier to
3468 understand. The -el command line option restores the original behavior
3469 for testing purposes.
3471 AcpiExec: Added support for overlapping operation regions. This change
3472 expands the simulation of operation regions by supporting regions that
3473 overlap within the given address space. Supports SystemMemory and
3474 SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
3476 AcpiExec: Added region handler support for PCI_Config and EC spaces. This
3477 allows AcpiExec to simulate these address spaces, similar to the current
3478 support for SystemMemory and SystemIO.
3480 Debugger: Added new command to read/write/compare all namespace objects.
3481 The command "test objects" will exercise the entire namespace by writing
3482 new values to each data object, and ensuring that the write was
3483 successful. The original value is then restored and verified.
3485 Debugger: Added the "test predefined" command. This change makes this
3486 test public and puts it under the new "test" command. The test executes
3487 each and every predefined name within the current namespace.
3490 ----------------------------------------
3491 18 December 2013. Summary of changes for version 20131218:
3493 Global note: The ACPI 5.0A specification was released this month. There
3494 are no changes needed for ACPICA since this release of ACPI is an
3495 errata/clarification release. The specification is available at
3499 1) ACPICA kernel-resident subsystem:
3501 Added validation of the XSDT root table if it is present. Some older
3502 platforms contain an XSDT that is ill-formed or otherwise invalid (such
3503 as containing some or all entries that are NULL pointers). This change
3504 adds a new function to validate the XSDT before actually using it. If the
3505 XSDT is found to be invalid, ACPICA will now automatically fall back to
3506 using the RSDT instead. Original implementation by Zhao Yakui. Ported to
3507 ACPICA and enhanced by Lv Zheng and Bob Moore.
3509 Added a runtime option to ignore the XSDT and force the use of the RSDT.
3510 This change adds a runtime option that will force ACPICA to use the RSDT
3511 instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
3512 requires that an XSDT be used instead of the RSDT, the XSDT has been
3513 found to be corrupt or ill-formed on some machines. Lv Zheng.
3515 Added a runtime option to favor 32-bit FADT register addresses over the
3516 64-bit addresses. This change adds an option to favor 32-bit FADT
3517 addresses when there is a conflict between the 32-bit and 64-bit versions
3518 of the same register. The default behavior is to use the 64-bit version
3519 in accordance with the ACPI specification. This can now be overridden via
3520 the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
3522 During the change above, the internal "Convert FADT" and "Verify FADT"
3523 functions have been merged to simplify the code, making it easier to
3524 understand and maintain. ACPICA BZ 933.
3526 Improve exception reporting and handling for GPE block installation.
3527 Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
3528 status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
3530 Added helper macros to extract bus/segment numbers from the HEST table.
3531 This change adds two macros to extract the encoded bus and segment
3532 numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
3533 Betty Dall <betty.dall@hp.com>
3535 Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
3536 by ACPICA. It is not a public macro, so it should have no effect on
3537 existing OSV code. Lv Zheng.
3539 Example Code and Data Size: These are the sizes for the OS-independent
3540 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3541 debug version of the code includes the debug output trace mechanism and
3542 has a much larger code and data size.
3545 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
3546 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
3548 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
3549 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
3552 2) iASL Compiler/Disassembler and Tools:
3554 Disassembler: Improved pathname support for emitted External()
3555 statements. This change adds full pathname support for external names
3556 that have been resolved internally by the inclusion of additional ACPI
3557 tables (via the iASL -e option). Without this change, the disassembler
3558 can emit multiple externals for the same object, or it become confused
3559 when the Scope() operator is used on an external object. Overall, greatly
3560 improves the ability to actually recompile the emitted ASL code when
3561 objects a referenced across multiple ACPI tables. Reported by Michael
3562 Tsirkin (mst@redhat.com).
3564 Tests/ASLTS: Updated functional control suite to execute with no errors.
3565 David Box. Fixed several errors related to the testing of the interpreter
3566 slack mode. Lv Zheng.
3568 iASL: Added support to detect names that are declared within a control
3569 method, but are unused (these are temporary names that are only valid
3570 during the time the method is executing). A remark is issued for these
3571 cases. ACPICA BZ 1022.
3573 iASL: Added full support for the DBG2 table. Adds full disassembler,
3574 table compiler, and template generator support for the DBG2 table (Debug
3577 iASL: Added full support for the PCCT table, update the table definition.
3578 Updates the PCCT table definition in the actbl3.h header and adds table
3579 compiler and template generator support.
3581 iASL: Added an option to emit only error messages (no warnings/remarks).
3582 The -ve option will enable only error messages, warnings and remarks are
3583 suppressed. This can simplify debugging when only the errors are
3584 important, such as when an ACPI table is disassembled and there are many
3585 warnings and remarks -- but only the actual errors are of real interest.
3587 Example ACPICA code (source/tools/examples): Updated the example code so
3588 that it builds to an actual working program, not just example code. Added
3589 ACPI tables and execution of an example control method in the DSDT. Added
3590 makefile support for Unix generation.
3593 ----------------------------------------
3594 15 November 2013. Summary of changes for version 20131115:
3596 This release is available at https://acpica.org/downloads
3599 1) ACPICA kernel-resident subsystem:
3601 Resource Manager: Fixed loop termination for the "get AML length"
3602 function. The loop previously had an error termination on a NULL resource
3603 pointer, which can never happen since the loop simply increments a valid
3604 resource pointer. This fix changes the loop to terminate with an error on
3605 an invalid end-of-buffer condition. The problem can be seen as an
3606 infinite loop by callers to AcpiSetCurrentResources with an invalid or
3607 corrupted resource descriptor, or a resource descriptor that is missing
3608 an END_TAG descriptor. Reported by Dan Carpenter
3609 <dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
3611 Table unload and ACPICA termination: Delete all attached data objects
3612 during namespace node deletion. This fix updates namespace node deletion
3613 to delete the entire list of attached objects (attached via
3614 AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
3615 1024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
3617 ACPICA termination: Added support to delete all objects attached to the
3618 root namespace node. This fix deletes any and all objects that have been
3619 attached to the root node via AcpiAttachData. Previously, none of these
3620 objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
3622 Debug output: Do not emit the function nesting level for the in-kernel
3623 build. The nesting level is really only useful during a single-thread
3624 execution. Therefore, only enable this output for the AcpiExec utility.
3625 Also, only emit the thread ID when executing under AcpiExec (Context
3626 switches are still always detected and a message is emitted). ACPICA BZ
3629 Example Code and Data Size: These are the sizes for the OS-independent
3630 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3631 debug version of the code includes the debug output trace mechanism and
3632 has a much larger code and data size.
3635 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
3636 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
3638 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
3639 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
3642 2) iASL Compiler/Disassembler and Tools:
3644 AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
3645 correct portable POSIX header for terminal control functions.
3647 Disassembler: Fixed control method invocation issues related to the use
3648 of the CondRefOf() operator. The problem is seen in the disassembly where
3649 control method invocations may not be disassembled properly if the
3650 control method name has been used previously as an argument to CondRefOf.
3651 The solution is to not attempt to emit an external declaration for the
3652 CondRefOf target (it is not necessary in the first place). This prevents
3653 disassembler object type confusion. ACPICA BZ 988.
3655 Unix Makefiles: Added an option to disable compiler optimizations and the
3656 _FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
3657 with optimizations (reportedly, gcc 4.4 for example). This change adds a
3658 command line option for make (NOOPT) that disables all compiler
3659 optimizations and the _FORTIFY_SOURCE compiler flag. The default
3660 optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
3661 1034. Lv Zheng, Bob Moore.
3663 Tests/ASLTS: Added options to specify individual test cases and modes.
3664 This allows testers running aslts.sh to optionally specify individual
3665 test modes and test cases. Also added an option to disable the forced
3666 generation of the ACPICA tools from source if desired. Lv Zheng.
3668 ----------------------------------------
3669 27 September 2013. Summary of changes for version 20130927:
3671 This release is available at https://acpica.org/downloads
3674 1) ACPICA kernel-resident subsystem:
3676 Fixed a problem with store operations to reference objects. This change
3677 fixes a problem where a Store operation to an ArgX object that contained
3679 reference to a field object did not complete the automatic dereference
3681 then write to the actual field object. Instead, the object type of the
3682 field object was inadvertently changed to match the type of the source
3683 operand. The new behavior will actually write to the field object (buffer
3684 field or field unit), thus matching the correct ACPI-defined behavior.
3686 Implemented support to allow the host to redefine individual OSL
3687 prototypes. This change enables the host to redefine OSL prototypes found
3688 in the acpiosxf.h file. This allows the host to implement OSL interfaces
3689 with a macro or inlined function. Further, it allows the host to add any
3690 additional required modifiers such as __iomem, __init, __exit, etc., as
3691 necessary on a per-interface basis. Enables maximum flexibility for the
3692 OSL interfaces. Lv Zheng.
3694 Hardcoded the access width for the FADT-defined reset register. The ACPI
3695 specification requires the reset register width to be 8 bits. ACPICA now
3696 hardcodes the width to 8 and ignores the FADT width value. This provides
3697 compatibility with other ACPI implementations that have allowed BIOS code
3698 with bad register width values to go unnoticed. Matthew Garett, Bob
3702 Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
3704 in the OSL header (acpiosxf). The change modifies the position of this
3705 macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
3706 build issues if the OSL defines the implementation of the interface to be
3707 an inline stub function. Lv Zheng.
3709 Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
3710 initialization interfaces. This change adds a new macro for the main init
3711 and terminate external interfaces in order to support hosts that require
3712 additional or different processing for these functions. Changed from
3713 ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
3716 Cleaned up the memory allocation macros for configurability. In the
3718 case, the ACPI_ALLOCATE and related macros now resolve directly to their
3719 respective AcpiOs* OSL interfaces. Two options:
3720 1) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
3721 default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
3722 2) For AcpiExec (and for debugging), the macros can optionally be
3724 to the local ACPICA interfaces that track each allocation (local tracking
3725 is used to immediately detect memory leaks).
3728 Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
3729 to predefine this macro to either TRUE or FALSE during the system build.
3731 Replaced __FUNCTION_ with __func__ in the gcc-specific header.
3733 Example Code and Data Size: These are the sizes for the OS-independent
3734 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3735 debug version of the code includes the debug output trace mechanism and
3736 has a much larger code and data size.
3739 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
3740 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
3742 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
3743 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
3746 2) iASL Compiler/Disassembler and Tools:
3748 iASL: Implemented wildcard support for the -e option. This simplifies use
3749 when there are many SSDTs that must be included to resolve external
3751 declarations. ACPICA BZ 1041. Example:
3752 iasl -e ssdt*.dat -d dsdt.dat
3754 AcpiExec: Add history/line-editing for Unix/Linux systems. This change
3755 adds a portable module that implements full history and limited line
3756 editing for Unix and Linux systems. It does not use readline() due to
3757 portability issues. Instead it uses the POSIX termio interface to put the
3758 terminal in raw input mode so that the various special keys can be
3760 (such as up/down-arrow for history support and left/right-arrow for line
3761 editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
3763 AcpiXtract: Add support to handle (ignore) "empty" lines containing only
3764 one or more spaces. This provides compatible with early or different
3765 versions of the AcpiDump utility. ACPICA BZ 1044.
3767 AcpiDump: Do not ignore tables that contain only an ACPI table header.
3768 Apparently, some BIOSs create SSDTs that contain an ACPI table header but
3769 no other data. This change adds support to dump these tables. Any tables
3770 shorter than the length of an ACPI table header remain in error (an error
3771 message is emitted). Reported by Yi Li.
3773 Debugger: Echo actual command along with the "unknown command" message.
3775 ----------------------------------------
3776 23 August 2013. Summary of changes for version 20130823:
3778 1) ACPICA kernel-resident subsystem:
3780 Implemented support for host-installed System Control Interrupt (SCI)
3781 handlers. Certain ACPI functionality requires the host to handle raw
3782 SCIs. For example, the "SCI Doorbell" that is defined for memory power
3783 state support requires the host device driver to handle SCIs to examine
3784 if the doorbell has been activated. Multiple SCI handlers can be
3785 installed to allow for future expansion. New external interfaces are
3786 AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
3787 details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
3789 Operation region support: Never locally free the handler "context"
3790 pointer. This change removes some dangerous code that attempts to free
3791 the handler context pointer in some (rare) circumstances. The owner of
3792 the handler owns this pointer and the ACPICA code should never touch it.
3793 Although not seen to be an issue in any kernel, it did show up as a
3794 problem (fault) under AcpiExec. Also, set the internal storage field for
3795 the context pointer to zero when the region is deactivated, simply for
3796 sanity. David Box. ACPICA BZ 1039.
3798 AcpiRead: On error, do not modify the return value target location. If an
3799 error happens in the middle of a split 32/32 64-bit I/O operation, do not
3800 modify the target of the return value pointer. Makes the code consistent
3801 with the rest of ACPICA. Bjorn Helgaas.
3803 Example Code and Data Size: These are the sizes for the OS-independent
3804 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3805 debug version of the code includes the debug output trace mechanism and
3806 has a much larger code and data size.
3809 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
3810 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
3812 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
3813 Debug Version: 185.4K Code, 77.1K Data, 262.5K Total
3816 2) iASL Compiler/Disassembler and Tools:
3818 AcpiDump: Implemented several new features and fixed some problems:
3819 1) Added support to dump the RSDP, RSDT, and XSDT tables.
3820 2) Added support for multiple table instances (SSDT, UEFI).
3821 3) Added option to dump "customized" (overridden) tables (-c).
3822 4) Fixed a problem where some table filenames were improperly
3824 5) Improved some error messages, removed some unnecessary messages.
3826 iASL: Implemented additional support for disassembly of ACPI tables that
3827 contain invocations of external control methods. The -fe<file> option
3828 allows the import of a file that specifies the external methods along
3829 with the required number of arguments for each -- allowing for the
3830 correct disassembly of the table. This is a workaround for a limitation
3831 of AML code where the disassembler often cannot determine the number of
3832 arguments required for an external control method and generates incorrect
3833 ASL code. See the iASL reference for details. ACPICA BZ 1030.
3835 Debugger: Implemented a new command (paths) that displays the full
3836 pathnames (namepaths) and object types of all objects in the namespace.
3837 This is an alternative to the namespace command.
3839 Debugger: Implemented a new command (sci) that invokes the SCI dispatch
3840 mechanism and any installed handlers.
3842 iASL: Fixed a possible segfault for "too many parent prefixes" condition.
3843 This can occur if there are too many parent prefixes in a namepath (for
3844 example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
3846 Application OSLs: Set the return value for the PCI read functions. These
3847 functions simply return AE_OK, but should set the return value to zero
3848 also. This change implements this. ACPICA BZ 1038.
3850 Debugger: Prevent possible command line buffer overflow. Increase the
3851 size of a couple of the debugger line buffers, and ensure that overflow
3852 cannot happen. ACPICA BZ 1037.
3854 iASL: Changed to abort immediately on serious errors during the parsing
3855 phase. Due to the nature of ASL, there is no point in attempting to
3856 compile these types of errors, and they typically end up causing a
3857 cascade of hundreds of errors which obscure the original problem.
3859 ----------------------------------------
3860 25 July 2013. Summary of changes for version 20130725:
3862 1) ACPICA kernel-resident subsystem:
3864 Fixed a problem with the DerefOf operator where references to FieldUnits
3865 and BufferFields incorrectly returned the parent object, not the actual
3866 value of the object. After this change, a dereference of a FieldUnit
3867 reference results in a read operation on the field to get the value, and
3868 likewise, the appropriate BufferField value is extracted from the target
3871 Fixed a problem where the _WAK method could cause a fault under these
3872 circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
3873 method returned no value. The problem is rarely seen because most kernels
3874 run ACPICA in slack mode.
3876 For the DerefOf operator, a fatal error now results if an attempt is made
3877 to dereference a reference (created by the Index operator) to a NULL
3878 package element. Provides compatibility with other ACPI implementations,
3879 and this behavior will be added to a future version of the ACPI
3882 The ACPI Power Management Timer (defined in the FADT) is now optional.
3883 This provides compatibility with other ACPI implementations and will
3884 appear in the next version of the ACPI specification. If there is no PM
3885 Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
3886 zero in the FADT indicates no PM timer.
3888 Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
3889 allows the host to globally enable/disable all vendor strings, all
3890 feature strings, or both. Intended to be primarily used for debugging
3891 purposes only. Lv Zheng.
3893 Expose the collected _OSI data to the host via a global variable. This
3894 data tracks the highest level vendor ID that has been invoked by the BIOS
3895 so that the host (and potentially ACPICA itself) can change behaviors
3896 based upon the age of the BIOS.
3898 Example Code and Data Size: These are the sizes for the OS-independent
3899 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3900 debug version of the code includes the debug output trace mechanism and
3901 has a much larger code and data size.
3904 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
3905 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
3907 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
3908 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
3911 2) iASL Compiler/Disassembler and Tools:
3913 iASL: Created the following enhancements for the -so option (create
3915 1)Add offsets for the last nameseg in each namepath for every supported
3917 2)Add support for Processor, Device, Thermal Zone, and Scope objects
3918 3)Add the actual AML opcode for the parent object of every supported
3920 4)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
3922 Disassembler: Emit all unresolved external symbols in a single block.
3923 These are external references to control methods that could not be
3924 resolved, and thus, the disassembler had to make a guess at the number of
3927 iASL: The argument to the -T option (create table template) is now
3928 optional. If not specified, the default table is a DSDT, typically the
3931 ----------------------------------------
3932 26 June 2013. Summary of changes for version 20130626:
3934 1) ACPICA kernel-resident subsystem:
3936 Fixed an issue with runtime repair of the _CST object. Null or invalid
3937 elements were not always removed properly. Lv Zheng.
3939 Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
3940 FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
3941 the maximum number of GPEs is 1016. Use of multiple GPE block devices
3942 makes the system-wide number of GPEs essentially unlimited.
3944 Example Code and Data Size: These are the sizes for the OS-independent
3945 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3946 debug version of the code includes the debug output trace mechanism and
3947 has a much larger code and data size.
3950 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
3951 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
3953 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
3954 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
3957 2) iASL Compiler/Disassembler and Tools:
3959 Portable AcpiDump: Implemented full support for the Linux and FreeBSD
3960 hosts. Now supports Linux, FreeBSD, and Windows.
3962 Disassembler: Added some missing types for the HEST and EINJ tables: "Set
3963 Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
3965 iASL/Preprocessor: Implemented full support for nested
3966 #if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
3968 Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
3969 max. The original purpose of this constraint was to limit the amount of
3970 debug output. However, the string function in question (UtPrintString) is
3971 now used for the disassembler also, where 256 bytes is insufficient.
3972 Reported by RehabMan@GitHub.
3974 iASL/DataTables: Fixed some problems and issues with compilation of DMAR
3975 tables. ACPICA BZ 999. Lv Zheng.
3977 iASL: Fixed a couple of error exit issues that could result in a "Could
3978 not delete <file>" message during ASL compilation.
3980 AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
3981 the actual signatures for these tables are "FACP" and "APIC",
3984 AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
3985 tables are allowed to have multiple instances.
3987 ----------------------------------------
3988 17 May 2013. Summary of changes for version 20130517:
3990 1) ACPICA kernel-resident subsystem:
3992 Fixed a regression introduced in version 20130328 for _INI methods. This
3993 change fixes a problem introduced in 20130328 where _INI methods are no
3994 longer executed properly because of a memory block that was not
3995 initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
3996 <tomasz.nowicki@linaro.org>.
3998 Fixed a possible problem with the new extended sleep registers in the
4000 5.0 FADT. Do not use these registers (even if populated) unless the HW-
4001 reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
4004 Implemented return value repair code for _CST predefined objects: Sort
4006 list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
4008 Implemented a debug-only option to disable loading of SSDTs from the
4009 RSDT/XSDT during ACPICA initialization. This can be useful for debugging
4010 ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
4011 acglobal.h - ACPICA BZ 1005. Lv Zheng.
4013 Fixed some issues in the ACPICA initialization and termination code:
4014 Tomasz Nowicki <tomasz.nowicki@linaro.org>
4015 1) Clear events initialized flag upon event component termination. ACPICA
4017 2) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
4018 3) Delete global lock pending lock during termination. ACPICA BZ 1012.
4019 4) Clear debug buffer global on termination to prevent possible multiple
4020 delete. ACPICA BZ 1010.
4022 Standardized all switch() blocks across the entire source base. After
4024 years, different formatting for switch() had crept in. This change makes
4025 the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
4027 Split some files to enhance ACPICA modularity and configurability:
4028 1) Split buffer dump routines into utilities/utbuffer.c
4029 2) Split internal error message routines into utilities/uterror.c
4030 3) Split table print utilities into tables/tbprint.c
4031 4) Split iASL command-line option processing into asloptions.c
4033 Makefile enhancements:
4034 1) Support for all new files above.
4035 2) Abort make on errors from any subcomponent. Chao Guan.
4036 3) Add build support for Apple Mac OS X. Liang Qi.
4038 Example Code and Data Size: These are the sizes for the OS-independent
4039 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4040 debug version of the code includes the debug output trace mechanism and
4041 has a much larger code and data size.
4044 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
4045 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
4047 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
4048 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
4051 2) iASL Compiler/Disassembler and Tools:
4053 New utility: Implemented an easily portable version of the acpidump
4054 utility to extract ACPI tables from the system (or a file) in an ASCII
4056 dump format. The top-level code implements the various command line
4057 options, file I/O, and table dump routines. To port to a new host, only
4058 three functions need to be implemented to get tables -- since this
4059 functionality is OS-dependent. See the tools/acpidump/apmain.c module and
4060 the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
4061 1) The Windows version obtains the ACPI tables from the Registry.
4062 2) The Linux version is under development.
4063 3) Other hosts - If an OS-dependent module is submitted, it will be
4064 distributed with ACPICA.
4066 iASL: Fixed a regression for -D preprocessor option (define symbol). A
4067 restructuring/change to the initialization sequence caused this option to
4068 no longer work properly.
4070 iASL: Implemented a mechanism to disable specific warnings and remarks.
4071 Adds a new command line option, "-vw <messageid> as well as "#pragma
4072 disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
4074 iASL: Fix for too-strict package object validation. The package object
4075 validation for return values from the predefined names is a bit too
4076 strict, it does not allow names references within the package (which will
4077 be resolved at runtime.) These types of references cannot be validated at
4078 compile time. This change ignores named references within package objects
4079 for names that return or define static packages.
4081 Debugger: Fixed the 80-character command line limitation for the History
4082 command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
4084 iASL: Added control method and package support for the -so option
4085 (generates AML offset table for BIOS support.)
4087 iASL: issue a remark if a non-serialized method creates named objects. If
4088 a thread blocks within the method for any reason, and another thread
4089 enters the method, the method will fail because an attempt will be made
4091 create the same (named) object twice. In this case, issue a remark that
4092 the method should be marked serialized. NOTE: may become a warning later.
4095 ----------------------------------------
4096 18 April 2013. Summary of changes for version 20130418:
4098 1) ACPICA kernel-resident subsystem:
4100 Fixed a possible buffer overrun during some rare but specific field unit
4101 read operations. This overrun can only happen if the DSDT version is 1 --
4102 meaning that all AML integers are 32 bits -- and the field length is
4103 between 33 and 55 bits long. During the read, an internal buffer object
4105 created for the field unit because the field is larger than an integer
4107 bits). However, in this case, the buffer will be incorrectly written
4108 beyond the end because the buffer length is less than the internal
4110 of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
4111 long, but a full 8 bytes will be written.
4113 Updated the Embedded Controller "orphan" _REG method support. This refers
4114 to _REG methods under the EC device that have no corresponding operation
4115 region. This is allowed by the ACPI specification. This update removes a
4116 dependency on the existence an ECDT table. It will execute an orphan _REG
4117 method as long as the operation region handler for the EC is installed at
4118 the EC device node and not the namespace root. Rui Zhang (original
4119 update), Bob Moore (update/integrate).
4121 Implemented run-time argument typechecking for all predefined ACPI names
4122 (_STA, _BIF, etc.) This change performs object typechecking on all
4123 incoming arguments for all predefined names executed via
4124 AcpiEvaluateObject. This ensures that ACPI-related device drivers are
4125 passing correct object types as well as the correct number of arguments
4126 (therefore identifying any issues immediately). Also, the ASL/namespace
4127 definition of the predefined name is checked against the ACPI
4128 specification for the proper argument count. Adds one new file,
4131 Changed an exception code for the ASL UnLoad() operator. Changed the
4132 exception code for the case where the input DdbHandle is invalid, from
4133 AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
4135 Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
4136 global makefile. The use of this flag causes compiler errors on earlier
4137 versions of GCC, so it has been removed for compatibility.
4139 Miscellaneous cleanup:
4140 1) Removed some unused/obsolete macros
4141 2) Fixed a possible memory leak in the _OSI support
4142 3) Removed an unused variable in the predefined name support
4143 4) Windows OSL: remove obsolete reference to a memory list field
4145 Example Code and Data Size: These are the sizes for the OS-independent
4146 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4147 debug version of the code includes the debug output trace mechanism and
4148 has a much larger code and data size.
4151 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
4152 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
4154 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
4155 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
4158 2) iASL Compiler/Disassembler and Tools:
4160 AcpiExec: Added installation of a handler for the SystemCMOS address
4161 space. This prevents control method abort if a method accesses this
4164 AcpiExec: Added support for multiple EC devices, and now install EC
4165 operation region handler(s) at the actual EC device instead of the
4166 namespace root. This reflects the typical behavior of host operating
4169 AcpiExec: Updated to ensure that all operation region handlers are
4170 installed before the _REG methods are executed. This prevents a _REG
4171 method from aborting if it accesses an address space has no handler.
4172 AcpiExec installs a handler for every possible address space.
4174 Debugger: Enhanced the "handlers" command to display non-root handlers.
4175 This change enhances the handlers command to display handlers associated
4176 with individual devices throughout the namespace, in addition to the
4177 currently supported display of handlers associated with the root
4181 ASL Test Suite: Several test suite errors have been identified and
4182 resolved, reducing the total error count during execution. Chao Guan.
4184 ----------------------------------------
4185 28 March 2013. Summary of changes for version 20130328:
4187 1) ACPICA kernel-resident subsystem:
4189 Fixed several possible race conditions with the internal object reference
4190 counting mechanism. Some of the external ACPICA interfaces update object
4191 reference counts without holding the interpreter or namespace lock. This
4192 change adds a spinlock to protect reference count updates on the internal
4193 ACPICA objects. Reported by and with assistance from Andriy Gapon
4196 FADT support: Removed an extraneous warning for very large GPE register
4197 sets. This change removes a size mismatch warning if the legacy length
4198 field for a GPE register set is larger than the 64-bit GAS structure can
4199 accommodate. GPE register sets can be larger than the 255-bit width
4200 limitation of the GAS structure. Linn Crosetto (linn@hp.com).
4202 _OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
4203 return from this interface. Handles a possible timeout case if
4204 ACPI_WAIT_FOREVER is modified by the host to be a value less than
4205 "forever". Jung-uk Kim.
4207 Predefined name support: Add allowed/required argument type information
4209 the master predefined info table. This change adds the infrastructure to
4210 enable typechecking on incoming arguments for all predefined
4211 methods/objects. It does not actually contain the code that will fully
4212 utilize this information, this is still under development. Also condenses
4213 some duplicate code for the predefined names into a new module,
4214 utilities/utpredef.c
4216 Example Code and Data Size: These are the sizes for the OS-independent
4217 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4218 debug version of the code includes the debug output trace mechanism and
4219 has a much larger code and data size.
4222 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
4223 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
4225 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
4226 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
4229 2) iASL Compiler/Disassembler and Tools:
4231 iASL: Implemented a new option to simplify the development of ACPI-
4233 BIOS code. Adds support for a new "offset table" output file. The -so
4234 option will create a C table containing the AML table offsets of various
4235 named objects in the namespace so that BIOS code can modify them easily
4237 boot time. This can simplify BIOS runtime code by eliminating expensive
4238 searches for "magic values", enhancing boot times and adding greater
4239 reliability. With assistance from Lee Hamel.
4241 iASL: Allow additional predefined names to return zero-length packages.
4242 Now, all predefined names that are defined by the ACPI specification to
4243 return a "variable-length package of packages" are allowed to return a
4244 zero length top-level package. This allows the BIOS to tell the host that
4245 the requested feature is not supported, and supports existing BIOS/ASL
4248 iASL: Changed the "result not used" warning to an error. This is the case
4249 where an ASL operator is effectively a NOOP because the result of the
4250 operation is not stored anywhere. For example:
4252 There is no target (missing 3rd argument), nor is the function return
4253 value used. This is potentially a very serious problem -- since the code
4254 was probably intended to do something, but for whatever reason, the value
4255 was not stored. Therefore, this issue has been upgraded from a warning to
4258 AcpiHelp: Added allowable/required argument types to the predefined names
4259 info display. This feature utilizes the recent update to the predefined
4260 names table (above).
4262 ----------------------------------------
4263 14 February 2013. Summary of changes for version 20130214:
4265 1) ACPICA Kernel-resident Subsystem:
4267 Fixed a possible regression on some hosts: Reinstated the safe return
4268 macros (return_ACPI_STATUS, etc.) that ensure that the argument is
4269 evaluated only once. Although these macros are not needed for the ACPICA
4270 code itself, they are often used by ACPI-related host device drivers
4272 the safe feature may be necessary.
4274 Fixed several issues related to the ACPI 5.0 reduced hardware support
4275 (SOC): Now ensure that if the platform declares itself as hardware-
4277 via the FADT, the following functions become NOOPs (and always return
4278 AE_OK) because ACPI is always enabled by definition on these machines:
4284 Dynamic Object Repair: Implemented additional runtime repairs for
4285 predefined name return values. Both of these repairs can simplify code in
4286 the related device drivers that invoke these methods:
4287 1) For the _STR and _MLS names, automatically repair/convert an ASCII
4288 string to a Unicode buffer.
4289 2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
4291 lone end tag descriptor in the following cases: A Return(0) was executed,
4292 a null buffer was returned, or no object at all was returned (non-slack
4293 mode only). Adds a new file, nsconvert.c
4294 ACPICA BZ 998. Bob Moore, Lv Zheng.
4296 Resource Manager: Added additional code to prevent possible infinite
4298 while traversing corrupted or ill-formed resource template buffers. Check
4299 for zero-length resource descriptors in all code that loops through
4300 resource templates (the length field is used to index through the
4301 template). This change also hardens the external AcpiWalkResources and
4302 AcpiWalkResourceBuffer interfaces.
4304 Local Cache Manager: Enhanced the main data structure to eliminate an
4305 unnecessary mechanism to access the next object in the list. Actually
4306 provides a small performance enhancement for hosts that use the local
4307 ACPICA cache manager. Jung-uk Kim.
4309 Example Code and Data Size: These are the sizes for the OS-independent
4310 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4311 debug version of the code includes the debug output trace mechanism and
4312 has a much larger code and data size.
4315 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
4316 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
4318 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
4319 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
4322 2) iASL Compiler/Disassembler and Tools:
4324 iASL/Disassembler: Fixed several issues with the definition of the ACPI
4325 5.0 RASF table (RAS Feature Table). This change incorporates late changes
4326 that were made to the ACPI 5.0 specification.
4328 iASL/Disassembler: Added full support for the following new ACPI tables:
4329 1) The MTMR table (MID Timer Table)
4330 2) The VRTC table (Virtual Real Time Clock Table).
4331 Includes header file, disassembler, table compiler, and template support
4334 iASL: Implemented compile-time validation of package objects returned by
4335 predefined names. This new feature validates static package objects
4336 returned by the various predefined names defined to return packages. Both
4337 object types and package lengths are validated, for both parent packages
4338 and sub-packages, if any. The code is similar in structure and behavior
4340 the runtime repair mechanism within the AML interpreter and uses the
4341 existing predefined name information table. Adds a new file, aslprepkg.c.
4344 iASL: Implemented auto-detection of binary ACPI tables for disassembly.
4345 This feature detects a binary file with a valid ACPI table header and
4346 invokes the disassembler automatically. Eliminates the need to
4347 specifically invoke the disassembler with the -d option. ACPICA BZ 862.
4349 iASL/Disassembler: Added several warnings for the case where there are
4350 unresolved control methods during the disassembly. This can potentially
4351 cause errors when the output file is compiled, because the disassembler
4352 assumes zero method arguments in these cases (it cannot determine the
4353 actual number of arguments without resolution/definition of the method).
4355 Debugger: Added support to display all resources with a single command.
4356 Invocation of the resources command with no arguments will now display
4358 resources within the current namespace.
4360 AcpiHelp: Added descriptive text for each ACPICA exception code displayed
4363 ----------------------------------------
4364 17 January 2013. Summary of changes for version 20130117:
4366 1) ACPICA Kernel-resident Subsystem:
4368 Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
4369 return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
4370 objects to return a package containing one integer, most BIOS code
4372 two integers and the previous code reflects that. However, we also need
4374 support BIOS code that actually implements to the ACPI spec, and this
4375 change reflects this.
4377 Fixed two issues with the ACPI_DEBUG_PRINT macros:
4378 1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
4379 C compilers that require this support.
4380 2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
4381 ACPI_DEBUG is already used by many of the various hosts.
4383 Updated all ACPICA copyrights and signons to 2013. Added the 2013
4384 copyright to all module headers and signons, including the standard Linux
4385 header. This affects virtually every file in the ACPICA core subsystem,
4386 iASL compiler, all ACPICA utilities, and the test suites.
4388 Example Code and Data Size: These are the sizes for the OS-independent
4389 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4390 debug version of the code includes the debug output trace mechanism and
4391 has a much larger code and data size.
4394 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
4395 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
4397 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
4398 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
4401 2) iASL Compiler/Disassembler and Tools:
4403 Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
4404 prevent a possible fault on some hosts. Some C libraries modify the arg
4405 pointer parameter to vfprintf making it difficult to call it twice in the
4406 AcpiOsVprintf function. Use a local buffer to workaround this issue. This
4407 does not affect the Windows OSL since the Win C library does not modify
4408 the arg pointer. Chao Guan, Bob Moore.
4410 iASL: Fixed a possible infinite loop when the maximum error count is
4411 reached. If an output file other than the .AML file is specified (such as
4412 a listing file), and the maximum number of errors is reached, do not
4413 attempt to flush data to the output file(s) as the compiler is aborting.
4414 This can cause an infinite loop as the max error count code essentially
4415 keeps calling itself.
4417 iASL/Disassembler: Added an option (-in) to ignore NOOP
4419 Implemented for both the compiler and the disassembler. Often, the NOOP
4420 opcode is used as padding for packages that are changed dynamically by
4422 BIOS. When disassembled and recompiled, these NOOPs will cause syntax
4423 errors. This option causes the disassembler to ignore all NOOP opcodes
4424 (0xA3), and it also causes the compiler to ignore all ASL source code
4428 Debugger: Enhanced the Sleep command to execute all sleep states. This
4429 change allows Sleep to be invoked with no arguments and causes the
4430 debugger to execute all of the sleep states, 0-5, automatically.
4432 ----------------------------------------
4433 20 December 2012. Summary of changes for version 20121220:
4435 1) ACPICA Kernel-resident Subsystem:
4437 Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
4438 alternate entry point for AcpiWalkResources and improves the usability of
4439 the resource manager by accepting as input a buffer containing the output
4440 of either a _CRS, _PRS, or _AEI method. The key functionality is that the
4441 input buffer is not deleted by this interface so that it can be used by
4442 the host later. See the ACPICA reference for details.
4444 Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
4445 (DSDT version < 2). The constant will be truncated and this warning
4446 reflects that behavior.
4448 Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
4449 ExtendedInterrupt, and GpioInt descriptors. This change adds support to
4450 both get and set the new wake bit in these descriptors, separately from
4451 the existing share bit. Reported by Aaron Lu.
4453 Interpreter: Fix Store() when an implicit conversion is not possible. For
4454 example, in the cases such as a store of a string to an existing package
4455 object, implement the store as a CopyObject(). This is a small departure
4456 from the ACPI specification which states that the control method should
4458 aborted in this case. However, the ASLTS suite depends on this behavior.
4460 Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
4461 macros: check if debug output is currently enabled as soon as possible to
4462 minimize performance impact if debug is in fact not enabled.
4464 Source code restructuring: Cleanup to improve modularity. The following
4465 new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
4466 psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
4467 Associated makefiles and project files have been updated.
4469 Changed an exception code for LoadTable operator. For the case where one
4470 of the input strings is too long, change the returned exception code from
4471 AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
4473 Fixed a possible memory leak in dispatcher error path. On error, delete
4474 the mutex object created during method mutex creation. Reported by
4475 tim.gardner@canonical.com.
4477 Example Code and Data Size: These are the sizes for the OS-independent
4478 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4479 debug version of the code includes the debug output trace mechanism and
4480 has a much larger code and data size.
4483 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
4484 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4486 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
4487 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
4490 2) iASL Compiler/Disassembler and Tools:
4492 iASL: Disallow a method call as argument to the ObjectType ASL operator.
4493 This change tracks an errata to the ACPI 5.0 document. The AML grammar
4494 will not allow the interpreter to differentiate between a method and a
4495 method invocation when these are used as an argument to the ObjectType
4496 operator. The ACPI specification change is to disallow a method
4498 (UserTerm) for the ObjectType operator.
4500 Finish support for the TPM2 and CSRT tables in the headers, table
4501 compiler, and disassembler.
4503 Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
4504 always expires immediately if the semaphore is not available. The
4506 code was using a relative-time timeout, but sem_timedwait requires the
4508 of an absolute time.
4510 iASL: Added a remark if the Timer() operator is used within a 32-bit
4511 table. This operator returns a 64-bit time value that will be truncated
4512 within a 32-bit table.
4514 iASL Source code restructuring: Cleanup to improve modularity. The
4515 following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
4516 aslmethod.c, and aslfileio.c. Associated makefiles and project files have
4520 ----------------------------------------
4521 14 November 2012. Summary of changes for version 20121114:
4523 1) ACPICA Kernel-resident Subsystem:
4525 Implemented a performance enhancement for ACPI/AML Package objects. This
4526 change greatly increases the performance of Package objects within the
4527 interpreter. It changes the processing of reference counts for packages
4529 optimizing for the most common case where the package sub-objects are
4530 either Integers, Strings, or Buffers. Increases the overall performance
4532 the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
4534 Chao Guan. ACPICA BZ 943.
4536 Implemented and deployed common macros to extract flag bits from resource
4537 descriptors. Improves readability and maintainability of the code. Fixes
4539 problem with the UART serial bus descriptor for the number of data bits
4540 flags (was incorrectly 2 bits, should be 3).
4542 Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
4543 of the macros and changed the SETx macros to the style of (destination,
4544 source). Also added ACPI_CASTx companion macros. Lv Zheng.
4546 Example Code and Data Size: These are the sizes for the OS-independent
4547 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4548 debug version of the code includes the debug output trace mechanism and
4549 has a much larger code and data size.
4552 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
4553 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4555 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
4556 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4559 2) iASL Compiler/Disassembler and Tools:
4561 Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
4562 adds the ShareAndWake and ExclusiveAndWake flags which were added to the
4563 Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
4565 Disassembler: Fixed a problem with external declaration generation. Fixes
4566 a problem where an incorrect pathname could be generated for an external
4567 declaration if the original reference to the object includes leading
4568 carats (^). ACPICA BZ 984.
4570 Debugger: Completed a major update for the Disassemble<method> command.
4571 This command was out-of-date and did not properly disassemble control
4572 methods that had any reasonable complexity. This fix brings the command
4574 to the same level as the rest of the disassembler. Adds one new file,
4575 dmdeferred.c, which is existing code that is now common with the main
4576 disassembler and the debugger disassemble command. ACPICA MZ 978.
4578 iASL: Moved the parser entry prototype to avoid a duplicate declaration.
4579 Newer versions of Bison emit this prototype, so moved the prototype out
4581 the iASL header to where it is actually used in order to avoid a
4585 iASL/Tools: Standardized use of the stream I/O functions:
4586 1) Ensure check for I/O error after every fopen/fread/fwrite
4587 2) Ensure proper order of size/count arguments for fread/fwrite
4588 3) Use test of (Actual != Requested) after all fwrite, and most fread
4589 4) Standardize I/O error messages
4590 Improves reliability and maintainability of the code. Bob Moore, Lv
4594 Disassembler: Prevent duplicate External() statements. During generation
4595 of external statements, detect similar pathnames that are actually
4596 duplicates such as these:
4599 Remove all leading '\' characters from pathnames during the external
4600 statement generation so that duplicates will be detected and tossed.
4603 Tools: Replace low-level I/O with stream I/O functions. Replace
4604 open/read/write/close with the stream I/O equivalents
4605 fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
4608 AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
4609 name header so that AcpiXtract recognizes the output file/table.
4611 iASL: Remove obsolete -2 option flag. Originally intended to force the
4612 compiler/disassembler into an ACPI 2.0 mode, this was never implemented
4613 and the entire concept is now obsolete.
4615 ----------------------------------------
4616 18 October 2012. Summary of changes for version 20121018:
4619 1) ACPICA Kernel-resident Subsystem:
4621 Updated support for the ACPI 5.0 MPST table. Fixes some problems
4622 introduced by late changes to the table as it was added to the ACPI 5.0
4623 specification. Includes header, disassembler, and data table compiler
4624 support as well as a new version of the MPST template.
4626 AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
4627 5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
4628 methods: _HID, _CID, and _UID.
4630 Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
4631 ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
4632 name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
4633 names for their various drivers. Affects the AcpiGetObjectInfo external
4634 interface, and other internal interfaces as well.
4636 Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
4637 This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
4638 on machines that support non-aligned transfers. Optimizes for this case
4639 rather than using a strncpy. With assistance from Zheng Lv.
4641 Resource Manager: Small fix for buffer size calculation. Fixed a one byte
4642 error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
4644 Added a new debug print message for AML mutex objects that are force-
4645 released. At control method termination, any currently acquired mutex
4646 objects are force-released. Adds a new debug-only message for each one
4649 Audited/updated all ACPICA return macros and the function debug depth
4650 counter: 1) Ensure that all functions that use the various TRACE macros
4651 also use the appropriate ACPICA return macros. 2) Ensure that all normal
4652 return statements surround the return expression (value) with parens to
4653 ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
4654 Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
4656 Global source code changes/maintenance: All extra lines at the start and
4657 end of each source file have been removed for consistency. Also, within
4658 comments, all new sentences start with a single space instead of a double
4659 space, again for consistency across the code base.
4661 Example Code and Data Size: These are the sizes for the OS-independent
4662 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4663 debug version of the code includes the debug output trace mechanism and
4664 has a much larger code and data size.
4667 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
4668 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
4670 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
4671 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4674 2) iASL Compiler/Disassembler and Tools:
4676 AcpiExec: Improved the algorithm used for memory leak/corruption
4677 detection. Added some intelligence to the code that maintains the global
4678 list of allocated memory. The list is now ordered by allocated memory
4679 address, significantly improving performance. When running AcpiExec on
4680 the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
4681 on the platform and/or the environment. Note, this performance
4682 enhancement affects the AcpiExec utility only, not the kernel-resident
4685 Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
4686 the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
4687 incorrect table offset reported for invalid opcodes. Report the original
4688 32-bit value for bad ACPI_NAMEs (as well as the repaired name.)
4690 Disassembler: Enhanced the -vt option to emit the binary table data in
4691 hex format to assist with debugging.
4693 Fixed a potential filename buffer overflow in osunixdir.c. Increased the
4694 size of file structure. Colin Ian King.
4696 ----------------------------------------
4697 13 September 2012. Summary of changes for version 20120913:
4700 1) ACPICA Kernel-resident Subsystem:
4702 ACPI 5.0: Added two new notify types for the Hardware Error Notification
4703 Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
4707 Table Manager: Merged/removed duplicate code in the root table resize
4708 functions. One function is external, the other is internal. Lv Zheng,
4712 Makefiles: Completely removed the obsolete "Linux" makefiles under
4713 acpica/generate/linux. These makefiles are obsolete and have been
4716 the generic unix makefiles under acpica/generate/unix.
4718 Makefiles: Ensure that binary files always copied properly. Minor rule
4720 to ensure that the final binary output files are always copied up to the
4721 appropriate binary directory (bin32 or bin64.)
4723 Example Code and Data Size: These are the sizes for the OS-independent
4724 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4726 version of the code includes the debug output trace mechanism and has a
4728 larger code and data size.
4731 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
4732 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
4734 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
4735 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
4738 2) iASL Compiler/Disassembler and Tools:
4740 Disassembler: Fixed a possible fault during the disassembly of resource
4741 descriptors when a second parse is required because of the invocation of
4742 external control methods within the table. With assistance from
4743 adq@lidskialf.net. ACPICA BZ 976.
4745 iASL: Fixed a namepath optimization problem. An error can occur if the
4747 node that contains the namepath to be optimized does not have a parent
4749 that is a named object. This change fixes the problem.
4751 iASL: Fixed a regression where the AML file is not deleted on errors. The
4753 output file should be deleted if there are any errors during the
4756 only exception is if the -f (force output) option is used. ACPICA BZ 974.
4758 iASL: Added a feature to automatically increase internal line buffer
4760 Via realloc(), automatically increase the internal line buffer sizes as
4761 necessary to support very long source code lines. The current version of
4763 preprocessor requires a buffer long enough to contain full source code
4765 This change increases the line buffer(s) if the input lines go beyond the
4766 current buffer size. This eliminates errors that occurred when a source
4768 line was longer than the buffer.
4770 iASL: Fixed a problem with constant folding in method declarations. The
4771 SyncLevel term is a ByteConstExpr, and incorrect code would be generated
4773 Type3 opcode was used.
4775 Debugger: Improved command help support. For incorrect argument count,
4777 full help for the command. For help command itself, allow an argument to
4780 Test Suites: Several bug fixes for the ASLTS suite reduces the number of
4781 errors during execution of the suite. Guan Chao.
4783 ----------------------------------------
4784 16 August 2012. Summary of changes for version 20120816:
4787 1) ACPICA Kernel-resident Subsystem:
4789 Removed all use of the deprecated _GTS and _BFS predefined methods. The
4791 (Going To Sleep) and _BFS (Back From Sleep) methods are essentially
4792 deprecated and will probably be removed from the ACPI specification.
4794 does not invoke them, and reportedly never will. The final nail in the
4796 is that the ACPI specification states that these methods must be run with
4797 interrupts off, which is not going to happen in a kernel interpreter.
4799 Linux has removed all use of the methods also. It was discovered that
4800 invoking these functions caused failures on some machines, probably
4802 they were never tested since Windows does not call them. Affects two
4804 interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
4807 Implemented support for complex bit-packed buffers returned from the _PLD
4808 (Physical Location of Device) predefined method. Adds a new external
4809 interface, AcpiDecodePldBuffer that parses the buffer into a more usable
4811 structure. Note: C Bitfields cannot be used for this type of predefined
4812 structure since the memory layout of individual bitfields is not defined
4814 the C language. In addition, there are endian concerns where a compiler
4816 change the bitfield ordering based on the machine type. The new ACPICA
4817 interface eliminates these issues, and should be called after _PLD is
4818 executed. ACPICA BZ 954.
4820 Implemented a change to allow a scope change to root (via "Scope (\)")
4822 execution of module-level ASL code (code that is executed at table load
4825 Added the Windows8/Server2012 string for the _OSI method. This change
4828 new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
4831 Added header support for the new ACPI tables DBG2 (Debug Port Table Type
4833 and CSRT (Core System Resource Table).
4835 Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
4836 names. This simplifies access to the buffers returned by these predefined
4837 names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
4839 GPE support: Removed an extraneous parameter from the various low-level
4840 internal GPE functions. Tang Feng.
4842 Removed the linux makefiles from the unix packages. The generate/linux
4843 makefiles are obsolete and have been removed from the unix tarball
4845 packages. The replacement makefiles are under generate/unix, and there is
4847 top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
4849 Updates for Unix makefiles:
4850 1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
4851 2) Update linker flags (move to end of command line) for AcpiExec
4855 Split ACPICA initialization functions to new file, utxfinit.c. Split from
4856 utxface.c to improve modularity and reduce file size.
4858 Example Code and Data Size: These are the sizes for the OS-independent
4859 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4860 debug version of the code includes the debug output trace mechanism and
4862 much larger code and data size.
4865 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
4866 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
4868 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
4869 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
4872 2) iASL Compiler/Disassembler and Tools:
4874 iASL: Fixed a problem with constant folding for fixed-length constant
4875 expressions. The constant-folding code was not being invoked for constant
4876 expressions that allow the use of type 3/4/5 opcodes to generate
4878 for expressions such as ByteConstExpr, WordConstExpr, etc. This could
4880 in the generation of invalid AML bytecode. ACPICA BZ 970.
4882 iASL: Fixed a generation issue on newer versions of Bison. Newer versions
4883 apparently automatically emit some of the necessary externals. This
4885 handles these versions in order to eliminate generation warnings.
4887 Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
4889 Disassembler: Add support to decode _PLD buffers. The decoded buffer
4891 within comments in the output file.
4893 Debugger: Fixed a regression with the "Threads" command where
4894 AE_BAD_PARAMETER was always returned.
4896 ----------------------------------------
4897 11 July 2012. Summary of changes for version 20120711:
4899 1) ACPICA Kernel-resident Subsystem:
4901 Fixed a possible fault in the return package object repair code. Fixes a
4902 problem that can occur when a lone package object is wrapped with an
4904 package object in order to force conformance to the ACPI specification.
4906 affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
4910 Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
4911 PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
4912 ARB_DIS bit must be implemented in the host-dependent C3 processor power
4914 support. Note, ARB_DIS is obsolete and only applies to older chipsets,
4916 Intel and other vendors. (for Intel: ICH4-M and earlier)
4918 This change removes the code to disable/enable bus master arbitration
4920 suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
4922 resume problems on some machines. The change has been in use for over
4926 Implemented two new external interfaces to support host-directed dynamic
4928 table load and unload. They are intended to simplify the host
4930 of hot-plug support:
4931 AcpiLoadTable: Load an SSDT from a buffer into the namespace.
4932 AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
4934 See the ACPICA reference for additional details. Adds one new file,
4935 components/tables/tbxfload.c
4937 Implemented and deployed two new interfaces for errors and warnings that
4939 known to be caused by BIOS/firmware issues:
4940 AcpiBiosError: Prints "ACPI Firmware Error" message.
4941 AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
4942 Deployed these new interfaces in the ACPICA Table Manager code for ACPI
4944 and FADT errors. Additional deployment to be completed as appropriate in
4946 future. The associated conditional macros are ACPI_BIOS_ERROR and
4947 ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
4952 Implicit notify support: ensure that no memory allocation occurs within a
4953 critical region. This fix moves a memory allocation outside of the time
4955 spinlock is held. Fixes issues on systems that do not allow this
4959 Split exception code utilities and tables into a new file,
4962 Example Code and Data Size: These are the sizes for the OS-independent
4963 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4965 version of the code includes the debug output trace mechanism and has a
4967 larger code and data size.
4970 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
4971 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
4973 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
4974 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
4977 2) iASL Compiler/Disassembler and Tools:
4979 iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
4983 Debugger: Enhanced the "tables" command to emit additional information
4985 the current set of ACPI tables, including the owner ID and flags decode.
4987 Debugger: Reimplemented the "unload" command to use the new
4988 AcpiUnloadParentTable external interface. This command was disable
4990 due to need for an unload interface.
4992 AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
4994 will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
4996 ----------------------------------------
4997 20 June 2012. Summary of changes for version 20120620:
5000 1) ACPICA Kernel-resident Subsystem:
5002 Implemented support to expand the "implicit notify" feature to allow
5004 devices to be notified by a single GPE. This feature automatically
5006 runtime device notification in the absence of a BIOS-provided GPE control
5007 method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
5009 provided by ACPICA for Windows compatibility, and is a workaround for
5012 code errors. See the description of the AcpiSetupGpeForWake interface in
5014 APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
5016 Changed some comments and internal function names to simplify and ensure
5017 correctness of the Linux code translation. No functional changes.
5019 Example Code and Data Size: These are the sizes for the OS-independent
5020 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5022 version of the code includes the debug output trace mechanism and has a
5024 larger code and data size.
5027 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
5028 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
5030 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
5031 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
5034 2) iASL Compiler/Disassembler and Tools:
5036 Disassembler: Added support to emit short, commented descriptions for the
5038 predefined names in order to improve the readability of the disassembled
5039 output. ACPICA BZ 959. Changes include:
5040 1) Emit descriptions for all standard predefined names (_INI, _STA,
5043 2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
5044 3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
5047 AcpiSrc: Fixed several long-standing Linux code translation issues.
5049 descriptions in function headers are now translated properly to lower
5052 underscores. ACPICA BZ 961. Also fixes translation problems such as
5058 local_fADT -> local_FADT
5059 execute_oSI -> execute_OSI
5061 iASL: Fixed a problem where null bytes were inadvertently emitted into
5065 iASL: Added the existing debug options to the standard help screen. There
5067 no longer two different help screens. ACPICA BZ 957.
5069 AcpiHelp: Fixed some typos in the various predefined name descriptions.
5071 expand some of the descriptions where appropriate.
5073 iASL: Fixed the -ot option (display compile times/statistics). Was not
5075 properly for standard output; only worked for the debug file case.
5077 ----------------------------------------
5078 18 May 2012. Summary of changes for version 20120518:
5081 1) ACPICA Core Subsystem:
5083 Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
5085 to block until asynchronous events such as notifies and GPEs have
5087 Within ACPICA, it is only called before a notify or GPE handler is
5088 removed/uninstalled. It also may be useful for the host OS within related
5089 drivers such as the Embedded Controller driver. See the ACPICA reference
5091 additional information. ACPICA BZ 868.
5093 ACPI Tables: Added a new error message for a possible overflow failure
5095 the conversion of FADT 32-bit legacy register addresses to internal
5098 bit GAS structure representation. The GAS has a one-byte "bit length"
5100 thus limiting the register length to 255 bits. ACPICA BZ 953.
5102 Example Code and Data Size: These are the sizes for the OS-independent
5103 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5105 version of the code includes the debug output trace mechanism and has a
5107 larger code and data size.
5110 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5111 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
5113 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
5114 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
5117 2) iASL Compiler/Disassembler and Tools:
5119 iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
5121 This keyword was added late in the ACPI 5.0 release cycle and was not
5122 implemented until now.
5124 Disassembler: Added support for Operation Region externals. Adds missing
5125 support for operation regions that are defined in another table, and
5126 referenced locally via a Field or BankField ASL operator. Now generates
5128 correct External statement.
5130 Disassembler: Several additional fixes for the External() statement
5132 related to some ASL operators. Also, order the External() statements
5133 alphabetically in the disassembler output. Fixes the External()
5136 the Create* field, Alias, and Scope operators:
5137 1) Create* buffer field operators - fix type mismatch warning on
5139 2) Alias - implement missing External support
5140 3) Scope - fix to make sure all necessary externals are emitted.
5142 iASL: Improved pathname support. For include files, merge the prefix
5144 with the file pathname and eliminate unnecessary components. Convert
5145 backslashes in all pathnames to forward slashes, for readability. Include
5147 pathname changes affect both #include and Include() type operators.
5149 iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
5151 of a valid line by inserting a newline and then returning the EOF during
5153 next call to GetNextLine. Prevents the line from being ignored due to EOF
5156 iASL: Implemented some changes to enhance the IDE support (-vi option.)
5158 and Warning messages are now correctly recognized for both the source
5160 browser and the global error and warning counts.
5162 ----------------------------------------
5163 20 April 2012. Summary of changes for version 20120420:
5166 1) ACPICA Core Subsystem:
5168 Implemented support for multiple notify handlers. This change adds
5171 allow multiple system and device notify handlers on Device, Thermal Zone,
5173 Processor objects. This can simplify the host OS notification
5175 Also re-worked and restructured the entire notify support code to
5177 handler installation, handler removal, notify event queuing, and notify
5178 dispatch to handler(s). Note: there can still only be two global notify
5179 handlers - one for system notifies and one for device notifies. There are
5181 changes to the existing handler install/remove interfaces. Lin Ming, Bob
5182 Moore, Rafael Wysocki.
5184 Fixed a regression in the package repair code where the object reference
5185 count was calculated incorrectly. Regression was introduced in the commit
5186 "Support to add Package wrappers".
5188 Fixed a couple possible memory leaks in the AML parser, in the error
5190 path. Jesper Juhl, Lin Ming.
5192 Example Code and Data Size: These are the sizes for the OS-independent
5193 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5194 debug version of the code includes the debug output trace mechanism and
5196 much larger code and data size.
5199 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5200 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5202 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5203 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
5206 2) iASL Compiler/Disassembler and Tools:
5208 iASL: Fixed a problem with the resource descriptor support where the
5210 of the StartDependentFn and StartDependentFnNoPrio descriptors were not
5211 included in cumulative descriptor offset, resulting in incorrect values
5213 resource tags within resource descriptors appearing after a
5215 descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
5217 iASL and Preprocessor: Implemented full support for the #line directive
5219 correctly track original source file line numbers through the .i
5221 output file - for error and warning messages.
5223 iASL: Expand the allowable byte constants for address space IDs.
5225 the allowable range was 0x80-0xFF (user-defined spaces), now the range is
5226 0x0A-0xFF to allow for custom and new IDs without changing the compiler.
5228 iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
5230 iASL: Add option to completely disable the preprocessor (-Pn).
5232 iASL: Now emit all error/warning messages to standard error (stderr) by
5233 default (instead of the previous stdout).
5235 ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
5237 for resource descriptor offset fix above. Update/cleanup error output
5238 routines. Enable and send iASL errors/warnings to an error logfile
5239 (error.txt). Send all other iASL output to a logfile (compiler.txt).
5241 several extraneous "unrecognized operator" messages.
5243 ----------------------------------------
5244 20 March 2012. Summary of changes for version 20120320:
5247 1) ACPICA Core Subsystem:
5249 Enhanced the sleep/wake interfaces to optionally execute the _GTS method
5250 (Going To Sleep) and the _BFS method (Back From Sleep). Windows
5252 does not execute these methods, and therefore these methods are often
5253 untested. It has been seen on some systems where the execution of these
5254 methods causes errors and also prevents the machine from entering S5. It
5256 therefore suggested that host operating systems do not execute these
5258 by default. In the future, perhaps these methods can be optionally
5260 based on the age of the system and/or what is the newest version of
5262 that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
5264 AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
5267 Fixed a problem where the length of the local/common FADT was set too
5269 The local FADT table length cannot be set to the common length until the
5270 original length has been examined. There is code that checks the table
5272 and sets various fields appropriately. This can affect older machines
5274 early FADT versions. For example, this can cause inadvertent writes to
5276 CST_CNT register. Julian Anastasov.
5278 Fixed a mapping issue related to a physical table override. Use the
5280 mapping mechanism for tables loaded via the physical override OSL
5282 This allows for early mapping before the virtual memory manager is
5284 Thomas Renninger, Bob Moore.
5286 Enhanced the automatic return-object repair code: Repair a common problem
5288 predefined methods that are defined to return a variable-length Package
5290 sub-objects. If there is only one sub-object, some BIOS ASL code
5292 simply returns the single object instead of a Package with one sub-
5294 This new support will repair this error by wrapping a Package object
5296 the original object, creating the correct and expected Package with one
5298 object. Names that can be repaired in this manner include: _ALR, _CSD,
5300 _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
5303 Changed the exception code returned for invalid ACPI paths passed as
5304 parameters to external interfaces such as AcpiEvaluateObject. Was
5305 AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
5307 Example Code and Data Size: These are the sizes for the OS-independent
5308 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5310 version of the code includes the debug output trace mechanism and has a
5312 larger code and data size.
5315 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
5316 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5318 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5319 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5322 2) iASL Compiler/Disassembler and Tools:
5324 iASL: Added the infrastructure and initial implementation of a integrated
5326 like preprocessor. This will simplify BIOS development process by
5328 the need for a separate preprocessing step during builds. On Windows, it
5330 eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
5331 features including full #define() macro support are still under
5333 These preprocessor directives are supported:
5346 In addition, these new command line options are supported:
5347 -D <symbol> Define symbol for preprocessor use
5348 -li Create preprocessed output file (*.i)
5349 -P Preprocess only and create preprocessor output file (*.i)
5351 Table Compiler: Fixed a problem where the equals operator within an
5353 did not work properly.
5355 Updated iASL to use the current versions of Bison/Flex. Updated the
5357 project file to invoke these tools from the standard location. ACPICA BZ
5360 Flex for Windows: V2.5.4
5361 Bison for Windows: V2.4.1
5363 ----------------------------------------
5364 15 February 2012. Summary of changes for version 20120215:
5367 1) ACPICA Core Subsystem:
5369 There have been some major changes to the sleep/wake support code, as
5370 described below (a - e).
5372 a) The AcpiLeaveSleepState has been split into two interfaces, similar to
5373 AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
5374 AcpiLeaveSleepStatePrep. This allows the host to perform actions between
5376 time the _BFS method is called and the _WAK method is called. NOTE: all
5378 must update their wake/resume code or else sleep/wake will not work
5382 b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
5384 method. Some machines require that the GPEs are enabled before the _WAK
5386 is executed. Thomas Renninger.
5388 c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
5390 Some BIOS code assumes that WAK_STS will be cleared on resume and use it
5392 determine whether the system is rebooting or resuming. Matthew Garrett.
5394 d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
5396 match the ACPI specification requirement. Rafael Wysocki.
5398 e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
5399 registers within the V5 FADT. This support adds two new files:
5400 hardware/hwesleep.c implements the support for the new registers. Moved
5402 sleep/wake external interfaces to hardware/hwxfsleep.c.
5405 Added a new OSL interface for ACPI table overrides,
5406 AcpiOsPhysicalTableOverride. This interface allows the host to override a
5407 table via a physical address, instead of the logical address required by
5408 AcpiOsTableOverride. This simplifies the host implementation. Initial
5409 implementation by Thomas Renninger. The ACPICA implementation creates a
5411 shared function for table overrides that attempts both a logical and a
5414 Expanded the OSL memory read/write interfaces to 64-bit data
5415 (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
5416 transfer support for GAS register structures passed to AcpiRead and
5419 Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
5421 build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
5423 See the ACPICA reference for details. ACPICA BZ 942. This option removes
5425 10% of the code and 5% of the static data, and the following hardware
5427 features become unavailable:
5428 PM Event and Control registers
5429 SCI interrupt (and handler)
5431 General Purpose Events (GPEs)
5434 FACS table (Waking vectors and Global Lock)
5436 Updated the unix tarball directory structure to match the ACPICA git
5438 tree. This ensures that the generic unix makefiles work properly (in
5439 generate/unix). Also updated the Linux makefiles to match. ACPICA BZ
5442 Updated the return value of the _REV predefined method to integer value 5
5444 reflect ACPI 5.0 support.
5446 Moved the external ACPI PM timer interface prototypes to the public
5448 file where they belong.
5450 Example Code and Data Size: These are the sizes for the OS-independent
5451 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5453 version of the code includes the debug output trace mechanism and has a
5455 larger code and data size.
5458 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
5459 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
5461 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
5462 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5465 2) iASL Compiler/Disassembler and Tools:
5467 Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
5468 descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
5469 incorrectly displayed.
5471 AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
5474 ----------------------------------------
5475 11 January 2012. Summary of changes for version 20120111:
5478 1) ACPICA Core Subsystem:
5480 Implemented a new mechanism to allow host device drivers to check for
5482 range conflicts with ACPI Operation Regions. Both SystemMemory and
5484 address spaces are supported. A new external interface,
5485 AcpiCheckAddressRange,
5486 allows drivers to check an address range against the ACPI namespace. See
5488 ACPICA reference for additional details. Adds one new file,
5489 utilities/utaddress.c. Lin Ming, Bob Moore.
5491 Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
5494 Status registers, update the ACPI 5.0 flags, and update internal data
5495 structures to handle an FADT larger than 256 bytes. The size of the ACPI
5499 Updated all ACPICA copyrights and signons to 2012. Added the 2012
5501 all module headers and signons, including the standard Linux header. This
5502 affects virtually every file in the ACPICA core subsystem, iASL compiler,
5504 all ACPICA utilities.
5506 Example Code and Data Size: These are the sizes for the OS-independent
5507 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5509 version of the code includes the debug output trace mechanism and has a
5511 larger code and data size.
5514 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
5515 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
5517 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
5518 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
5521 2) iASL Compiler/Disassembler and Tools:
5523 Disassembler: fixed a problem with the automatic resource tag generation
5524 support. Fixes a problem where the resource tags are inadvertently not
5525 constructed if the table being disassembled contains external references
5527 control methods. Moved the actual construction of the tags to after the
5529 namespace is constructed (after 2nd parse is invoked due to external
5531 method references.) ACPICA BZ 941.
5533 Table Compiler: Make all "generic" operators caseless. These are the
5535 like UINT8, String, etc. Making these caseless improves ease-of-use.
5539 ----------------------------------------
5540 23 November 2011. Summary of changes for version 20111123:
5542 0) ACPI 5.0 Support:
5544 This release contains full support for the ACPI 5.0 specification, as
5547 Reduced Hardware Support:
5548 -------------------------
5550 This support allows for ACPI systems without the usual ACPI hardware.
5552 support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
5554 not attempt to initialize or use any of the usual ACPI hardware. Note,
5556 this flag is set, all of the following ACPI hardware is assumed to be not
5557 present and is not initialized or accessed:
5559 General Purpose Events (GPEs)
5560 Fixed Events (PM1a/PM1b and PM Control)
5561 Power Management Timer and Console Buttons (power/sleep)
5562 Real-time Clock Alarm
5564 System Control Interrupt (SCI)
5565 The FACS is assumed to be non-existent
5570 All new tables and updates to existing tables are fully supported in the
5571 ACPICA headers (for use by device drivers), the disassembler, and the
5573 Data Table Compiler. ACPI 5.0 defines these new tables:
5575 BGRT /* Boot Graphics Resource Table */
5576 DRTM /* Dynamic Root of Trust for Measurement table */
5577 FPDT /* Firmware Performance Data Table */
5578 GTDT /* Generic Timer Description Table */
5579 MPST /* Memory Power State Table */
5580 PCCT /* Platform Communications Channel Table */
5581 PMTT /* Platform Memory Topology Table */
5582 RASF /* RAS Feature table */
5584 Operation Regions/SpaceIDs:
5585 ---------------------------
5587 All new operation regions are fully supported by the iASL compiler, the
5588 disassembler, and the ACPICA runtime code (for dispatch to region
5590 The new operation region Space IDs are:
5595 Resource Descriptors:
5596 ---------------------
5598 All new ASL resource descriptors are fully supported by the iASL
5601 ASL/AML disassembler, and the ACPICA runtime Resource Manager code
5603 all new predefined resource tags). New descriptors are:
5612 ASL/AML Operators, New and Modified:
5613 ------------------------------------
5615 One new operator is added, the Connection operator, which is used to
5617 a GeneralPurposeIo or GenericSerialBus resource descriptor with
5619 field objects within an operation region. Several new protocols are
5621 with the AccessAs operator. All are fully supported by the iASL compiler,
5622 disassembler, and runtime ACPICA AML interpreter:
5624 Connection // Declare Field Connection
5626 AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol
5627 AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes
5629 AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
5630 RawDataBuffer // Data type for Vendor Data
5633 Predefined ASL/AML Objects:
5634 ---------------------------
5636 All new predefined objects/control-methods are supported by the iASL
5638 and the ACPICA runtime validation/repair (arguments and return values.)
5640 predefined names include the following:
5642 Standard Predefined Names (Objects or Control Methods):
5643 _AEI, _CLS, _CPC, _CWS, _DEP,
5644 _DLM, _EVT, _GCP, _CRT, _GWS,
5645 _HRV, _PRE, _PSE, _SRT, _SUB.
5647 Resource Tags (Names used to access individual fields within resource
5649 _DBT, _DPL, _DRS, _END, _FLC,
5650 _IOR, _LIN, _MOD, _PAR, _PHA,
5651 _PIN, _PPI, _POL, _RXL, _SLV,
5652 _SPE, _STB, _TXL, _VEN.
5654 ACPICA External Interfaces:
5655 ---------------------------
5657 Several new interfaces have been defined for use by ACPI-related device
5658 drivers and other host OS services:
5660 AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
5662 acquire and release AML mutexes that are defined in the DSDT/SSDT tables
5663 provided by the BIOS. They are intended to be used in conjunction with
5665 ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
5666 mutual exclusion with the AML code/interpreter.
5668 AcpiGetEventResources: Returns the (formatted) resource descriptors as
5670 by the ACPI 5.0 _AEI object (ACPI Event Information). This object
5672 resource descriptors associated with hardware-reduced platform events,
5674 to the AcpiGetCurrentResources interface.
5676 Operation Region Handlers: For General Purpose IO and Generic Serial Bus
5677 operation regions, information about the Connection() object and any
5679 length information is passed to the region handler within the Context
5682 AcpiBufferToResource: This interface converts a raw AML buffer containing
5684 resource template or resource descriptor to the ACPI_RESOURCE internal
5686 suitable for use by device drivers. Can be used by an operation region
5688 to convert the Connection() buffer object into a ACPI_RESOURCE.
5690 Miscellaneous/Tools/TestSuites:
5691 -------------------------------
5693 Support for extended _HID names (Four alpha characters instead of three).
5694 Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
5695 Support for ACPI 5.0 features in the ASLTS test suite.
5696 Fully updated documentation (ACPICA and iASL reference documents.)
5698 ACPI Table Definition Language:
5699 -------------------------------
5701 Support for this language was implemented and released as a subsystem of
5703 iASL compiler in 2010. (See the iASL compiler User Guide.)
5706 Non-ACPI 5.0 changes for this release:
5707 --------------------------------------
5709 1) ACPICA Core Subsystem:
5711 Fix a problem with operation region declarations where a failure can
5714 the region name and an argument that evaluates to an object (such as the
5715 region address) are in different namespace scopes. Lin Ming, ACPICA BZ
5718 Do not abort an ACPI table load if an invalid space ID is found within.
5720 will be caught later if the offending method is executed. ACPICA BZ 925.
5722 Fixed an issue with the FFixedHW space ID where the ID was not always
5723 recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
5725 Fixed a problem with the 32-bit generation of the unix-specific OSL
5726 (osunixxf.c). Lin Ming, ACPICA BZ 936.
5728 Several changes made to enable generation with the GCC 4.6 compiler.
5732 New error messages: Unsupported I/O requests (not 8/16/32 bit), and
5734 field registers out-of-range.
5736 2) iASL Compiler/Disassembler and Tools:
5738 iASL: Implemented the __PATH__ operator, which returns the full pathname
5740 the current source file.
5742 AcpiHelp: Automatically display expanded keyword information for all ASL
5745 Debugger: Add "Template" command to disassemble/dump resource template
5748 Added a new master script to generate and execute the ASLTS test suite.
5749 Automatically handles 32- and 64-bit generation. See tests/aslts.sh
5751 iASL: Fix problem with listing generation during processing of the
5753 operator where AML listing was disabled until the entire Switch block was
5756 iASL: Improve support for semicolon statement terminators. Fix "invalid
5757 character" message for some cases when the semicolon is used. Semicolons
5759 now allowed after every <Term> grammar element. ACPICA BZ 927.
5761 iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
5764 Disassembler: Fix problem with disassembly of the DataTableRegion
5766 where an inadvertent "Unhandled deferred opcode" message could be
5769 3) Example Code and Data Size
5771 These are the sizes for the OS-independent acpica.lib produced by the
5772 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
5773 includes the debug output trace mechanism and has a much larger code and
5778 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
5779 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5781 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
5782 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
5784 ----------------------------------------
5785 22 September 2011. Summary of changes for version 20110922:
5789 Support for ACPI 5.0 in ACPICA has been underway for several months and
5791 be released at the same time that ACPI 5.0 is officially released.
5793 The ACPI 5.0 specification is on track for release in the next few
5796 1) ACPICA Core Subsystem:
5798 Fixed a problem where the maximum sleep time for the Sleep() operator was
5799 intended to be limited to two seconds, but was inadvertently limited to
5803 Linux and Unix makefiles: Added header file dependencies to ensure
5805 generation of ACPICA core code and utilities. Also simplified the
5807 considerably through the use of the vpath variable to specify search
5811 2) iASL Compiler/Disassembler and Tools:
5813 iASL: Implemented support to check the access length for all fields
5815 access named Resource Descriptor fields. For example, if a resource field
5817 defined to be two bits, a warning is issued if a CreateXxxxField() is
5819 with an incorrect bit length. This is implemented for all current
5821 descriptor names. ACPICA BZ 930.
5823 Disassembler: Fixed a byte ordering problem with the output of 24-bit and
5827 iASL: Fixed a couple of issues associated with variable-length package
5828 objects. 1) properly handle constants like One, Ones, Zero -- do not make
5830 VAR_PACKAGE when these are used as a package length. 2) Allow the
5832 opcode (in addition to PACKAGE) when validating object types for
5836 iASL: Emit statistics for all output files (instead of just the ASL input
5838 AML output). Includes listings, hex files, etc.
5840 iASL: Added -G option to the table compiler to allow the compilation of
5842 ACPI tables. The only part of a table that is required is the standard
5847 AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
5849 which also adds correct 64-bit support. Also, now all output filenames
5851 completely lower case.
5853 AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
5854 loading table files. A warning is issued for any such tables. The only
5855 exception is an FADT. This also fixes a possible fault when attempting to
5857 non-AML tables. ACPICA BZ 932.
5859 AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
5861 missing table terminator could cause a fault when using the -p option.
5863 AcpiSrc: Fixed a possible divide-by-zero fault when generating file
5866 3) Example Code and Data Size
5868 These are the sizes for the OS-independent acpica.lib produced by the
5869 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
5870 includes the debug output trace mechanism and has a much larger code and
5874 Previous Release (VC 9.0):
5875 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
5876 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5877 Current Release (VC 9.0):
5878 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
5879 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5882 ----------------------------------------
5883 23 June 2011. Summary of changes for version 20110623:
5885 1) ACPI CA Core Subsystem:
5887 Updated the predefined name repair mechanism to not attempt repair of a
5889 return object if a _PSS object is present. We can only sort the _TSS
5891 package if there is no _PSS within the same scope. This is because if
5894 present, the ACPI specification dictates that the _TSS Power Dissipation
5896 is to be ignored, and therefore some BIOSs leave garbage values in the
5898 Power field(s). In this case, it is best to just return the _TSS package
5900 is. Reported by, and fixed with assistance from Fenghua Yu.
5902 Added an option to globally disable the control method return value
5904 and repair. This runtime option can be used to disable return value
5907 this is causing a problem on a particular machine. Also added an option
5909 AcpiExec (-dr) to set this disable flag.
5911 All makefiles and project files: Major changes to improve generation of
5913 tools. ACPICA BZ 912:
5914 Reduce default optimization levels to improve compatibility
5915 For Linux, add strict-aliasing=0 for gcc 4
5916 Cleanup and simplify use of command line defines
5917 Cleanup multithread library support
5918 Improve usage messages
5920 Linux-specific header: update handling of THREAD_ID and pthread. For the
5922 bit case, improve casting to eliminate possible warnings, especially with
5926 Example Code and Data Size: These are the sizes for the OS-independent
5927 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5929 version of the code includes the debug output trace mechanism and has a
5931 larger code and data size.
5933 Previous Release (VC 9.0):
5934 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
5935 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5936 Current Release (VC 9.0):
5937 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
5938 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5940 2) iASL Compiler/Disassembler and Tools:
5942 With this release, a new utility named "acpihelp" has been added to the
5944 package. This utility summarizes the ACPI specification chapters for the
5946 and AML languages. It generates under Linux/Unix as well as Windows, and
5947 provides the following functionality:
5948 Find/display ASL operator(s) -- with description and syntax.
5949 Find/display ASL keyword(s) -- with exact spelling and descriptions.
5950 Find/display ACPI predefined name(s) -- with description, number
5951 of arguments, and the return value data type.
5952 Find/display AML opcode name(s) -- with opcode, arguments, and
5954 Decode/display AML opcode -- with opcode name, arguments, and
5957 Service Layers: Make multi-thread support configurable. Conditionally
5959 the multi-thread support so that threading libraries will not be linked
5962 necessary. The only tool that requires multi-thread support is AcpiExec.
5964 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
5966 Bison appear to want the interface to yyerror to be a const char * (or at
5967 least this is a problem when generating iASL on some systems.) ACPICA BZ
5971 Tools: Fix for systems where O_BINARY is not defined. Only used for
5973 versions of the tools.
5975 ----------------------------------------
5976 27 May 2011. Summary of changes for version 20110527:
5978 1) ACPI CA Core Subsystem:
5980 ASL Load() operator: Reinstate most restrictions on the incoming ACPI
5982 signature. Now, only allow SSDT, OEMx, and a null signature. History:
5983 1) Originally, we checked the table signature for "SSDT" or "PSDT".
5984 (PSDT is now obsolete.)
5985 2) We added support for OEMx tables, signature "OEM" plus a fourth
5986 "don't care" character.
5987 3) Valid tables were encountered with a null signature, so we just
5988 gave up on validating the signature, (05/2008).
5989 4) We encountered non-AML tables such as the MADT, which caused
5990 interpreter errors and kernel faults. So now, we once again allow
5991 only SSDT, OEMx, and now, also a null signature. (05/2011).
5993 Added the missing _TDL predefined name to the global name list in order
5995 enable validation. Affects both the core ACPICA code and the iASL
5998 Example Code and Data Size: These are the sizes for the OS-independent
5999 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6001 version of the code includes the debug output trace mechanism and has a
6003 larger code and data size.
6005 Previous Release (VC 9.0):
6006 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
6007 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
6008 Current Release (VC 9.0):
6009 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
6010 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6012 2) iASL Compiler/Disassembler and Tools:
6014 Debugger/AcpiExec: Implemented support for "complex" method arguments on
6016 debugger command line. This adds support beyond simple integers --
6018 Strings, Buffers, and Packages. Includes support for nested packages.
6019 Increased the default command line buffer size to accommodate these
6021 See the ACPICA reference for details and syntax. ACPICA BZ 917.
6023 Debugger/AcpiExec: Implemented support for "default" method arguments for
6025 Execute/Debug command. Now, the debugger will always invoke a control
6027 with the required number of arguments -- even if the command line
6029 none or insufficient arguments. It uses default integer values for any
6031 arguments. Also fixes a bug where only six method arguments maximum were
6032 supported instead of the required seven.
6034 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
6036 also return status in order to prevent buffer overruns. See the ACPICA
6037 reference for details and syntax. ACPICA BZ 921
6039 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
6040 makefiles to simplify support for the two different but similar parser
6041 generators, bison and yacc.
6043 Updated the generic unix makefile for gcc 4. The default gcc version is
6045 expected to be 4 or greater, since options specific to gcc 4 are used.
6047 ----------------------------------------
6048 13 April 2011. Summary of changes for version 20110413:
6050 1) ACPI CA Core Subsystem:
6052 Implemented support to execute a so-called "orphan" _REG method under the
6054 device. This change will force the execution of a _REG method underneath
6057 device even if there is no corresponding operation region of type
6058 EmbeddedControl. Fixes a problem seen on some machines and apparently is
6059 compatible with Windows behavior. ACPICA BZ 875.
6061 Added more predefined methods that are eligible for automatic NULL
6063 element removal. This change adds another group of predefined names to
6066 of names that can be repaired by having NULL package elements dynamically
6067 removed. This group are those methods that return a single variable-
6069 package containing simple data types such as integers, buffers, strings.
6071 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
6074 and _TZD. ACPICA BZ 914.
6076 Split and segregated all internal global lock functions to a new file,
6079 Updated internal address SpaceID for DataTable regions. Moved this
6082 id in preparation for ACPI 5.0 changes that will include some new space
6085 change should not affect user/host code.
6087 Example Code and Data Size: These are the sizes for the OS-independent
6089 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
6091 the code includes the debug output trace mechanism and has a much larger
6096 Previous Release (VC 9.0):
6097 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
6098 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
6099 Current Release (VC 9.0):
6100 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
6101 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
6103 2) iASL Compiler/Disassembler and Tools:
6105 iASL/DTC: Major update for new grammar features. Allow generic data types
6107 custom ACPI tables. Field names are now optional. Any line can be split
6109 multiple lines using the continuation char (\). Large buffers now use
6111 continuation character(s) and no colon on the continuation lines. See the
6113 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
6116 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
6118 Since the parser stuffs a "zero" as the return value for these statements
6121 the underlying AML grammar), they were seen as "return with value" by the
6123 semantic checking. They are now seen correctly as "null" return
6126 iASL: Check if a_REG declaration has a corresponding Operation Region.
6128 check for each _REG to ensure that there is in fact a corresponding
6130 region declaration in the same scope. If not, the _REG method is not very
6132 since it probably won't be executed. ACPICA BZ 915.
6134 iASL/DTC: Finish support for expression evaluation. Added a new
6137 that implements c-style operator precedence and parenthesization. ACPICA
6141 Disassembler/DTC: Remove support for () and <> style comments in data
6144 that DTC has full expression support, we don't want to have comment
6147 start with a parentheses or a less-than symbol. Now, only the standard /*
6150 comments are supported, as well as the bracket [] comments.
6152 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
6154 headers in the acpidump file. Update the header validation to support
6156 tables. Problem introduced in previous AcpiXtract version in the change
6158 support "wrong checksum" error messages emitted by acpidump utility.
6160 iASL: Add a * option to generate all template files (as a synonym for
6164 "iasl -T *" or "iasl -T ALL".
6166 iASL/DTC: Do not abort compiler on fatal errors. We do not want to
6168 abort the compiler on "fatal" errors, simply should abort the current
6170 This allows multiple compiles with a single (possibly wildcard) compiler
6173 ----------------------------------------
6174 16 March 2011. Summary of changes for version 20110316:
6176 1) ACPI CA Core Subsystem:
6178 Fixed a problem caused by a _PRW method appearing at the namespace root
6180 during the setup of wake GPEs. A fault could occur if a _PRW directly
6183 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
6185 Implemented support for "spurious" Global Lock interrupts. On some
6187 global lock interrupt can occur without the pending flag being set. Upon
6190 interrupt, we now ensure that a thread is actually waiting for the lock
6192 signaling GL availability. Rafael Wysocki, Bob Moore.
6194 Example Code and Data Size: These are the sizes for the OS-independent
6196 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
6198 the code includes the debug output trace mechanism and has a much larger
6203 Previous Release (VC 9.0):
6204 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6205 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6206 Current Release (VC 9.0):
6207 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
6208 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
6210 2) iASL Compiler/Disassembler and Tools:
6212 Implemented full support for the "SLIC" ACPI table. Includes support in
6214 header files, disassembler, table compiler, and template generator. Bob
6218 AcpiXtract: Correctly handle embedded comments and messages from
6220 Apparently some or all versions of acpidump will occasionally emit a
6223 "Wrong checksum", etc., into the dump file. This was causing problems for
6224 AcpiXtract. ACPICA BZ 905.
6226 iASL: Fix the Linux makefile by removing an inadvertent double file
6230 AcpiExec: Update installation of operation region handlers. Install one
6232 for a user-defined address space. This is used by the ASL test suite
6235 ----------------------------------------
6236 11 February 2011. Summary of changes for version 20110211:
6238 1) ACPI CA Core Subsystem:
6240 Added a mechanism to defer _REG methods for some early-installed
6242 Most user handlers should be installed before call to
6243 AcpiEnableSubsystem.
6244 However, Event handlers and region handlers should be installed after
6245 AcpiInitializeObjects. Override handlers for the "default" regions should
6247 installed early, however. This change executes all _REG methods for the
6248 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
6249 chicken/egg issues between them. ACPICA BZ 848.
6251 Implemented an optimization for GPE detection. This optimization will
6253 ignore GPE registers that contain no enabled GPEs -- there is no need to
6254 read the register since this information is available internally. This
6255 becomes more important on machines with a large GPE space. ACPICA
6257 884. Lin Ming. Suggestion from Joe Liu.
6259 Removed all use of the highly unreliable FADT revision field. The
6261 number in the FADT has been found to be completely unreliable and cannot
6263 trusted. Only the actual table length can be used to infer the version.
6265 change updates the ACPICA core and the disassembler so that both no
6267 even look at the FADT version and instead depend solely upon the FADT
6270 Fix an unresolved name issue for the no-debug and no-error-message source
6271 generation cases. The _AcpiModuleName was left undefined in these cases,
6273 it is actually needed as a parameter to some interfaces. Define
6274 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
6276 Split several large files (makefiles and project files updated)
6277 utglobal.c -> utdecode.c
6278 dbcomds.c -> dbmethod.c dbnames.c
6279 dsopcode.c -> dsargs.c dscontrol.c
6280 dsload.c -> dsload2.c
6281 aslanalyze.c -> aslbtypes.c aslwalks.c
6283 Example Code and Data Size: These are the sizes for the OS-independent
6284 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6285 debug version of the code includes the debug output trace mechanism and
6287 a much larger code and data size.
6289 Previous Release (VC 9.0):
6290 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6291 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6292 Current Release (VC 9.0):
6293 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6294 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6296 2) iASL Compiler/Disassembler and Tools:
6298 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
6299 These are useful C-style macros with the standard definitions. ACPICA
6302 iASL/DTC: Added support for integer expressions and labels. Support for
6304 expressions for all integer fields in all ACPI tables. Support for labels
6306 "generic" portions of tables such as UEFI. See the iASL reference manual.
6308 Debugger: Added a command to display the status of global handlers. The
6309 "handlers" command will display op region, fixed event, and miscellaneous
6310 global handlers. installation status -- and for op regions, whether
6312 or user-installed handler will be used.
6314 iASL: Warn if reserved method incorrectly returns a value. Many
6316 names are defined such that they do not return a value. If implemented as
6318 method, issue a warning if such a name explicitly returns a value. ACPICA
6321 iASL: Added detection of GPE method name conflicts. Detects a conflict
6323 there are two GPE methods of the form _Lxy and _Exy in the same scope.
6325 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
6327 iASL/DTC: Fixed a couple input scanner issues with comments and line
6328 numbers. Comment remover could get confused and miss a comment ending.
6330 a problem with line counter maintenance.
6332 iASL/DTC: Reduced the severity of some errors from fatal to error. There
6334 no need to abort on simple errors within a field definition.
6336 Debugger: Simplified the output of the help command. All help output now
6338 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
6340 ----------------------------------------
6341 12 January 2011. Summary of changes for version 20110112:
6343 1) ACPI CA Core Subsystem:
6345 Fixed a race condition between method execution and namespace walks that
6347 possibly cause a fault. The problem was apparently introduced in version
6348 20100528 as a result of a performance optimization that reduces the
6351 namespace walks upon method exit by using the delete_namespace_subtree
6352 function instead of the delete_namespace_by_owner function used
6354 Bug is a missing namespace lock in the delete_namespace_subtree function.
6355 dana.myers@oracle.com
6357 Fixed several issues and a possible fault with the automatic "serialized"
6358 method support. History: This support changes a method to "serialized" on
6360 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
6361 possibility that it cannot handle reentrancy. This fix repairs a couple
6363 issues seen in the field, especially on machines with many cores:
6365 1) Delete method children only upon the exit of the last thread,
6366 so as to not delete objects out from under other running threads
6367 (and possibly causing a fault.)
6368 2) Set the "serialized" bit for the method only upon the exit of the
6369 Last thread, so as to not cause deadlock when running threads
6371 3) Cleanup the use of the AML "MethodFlags" and internal method flags
6372 so that there is no longer any confusion between the two.
6374 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
6376 Debugger: Now lock the namespace for duration of a namespace dump.
6378 issues if the namespace is changing dynamically underneath the debugger.
6379 Especially affects temporary namespace nodes, since the debugger displays
6382 Updated the ordering of include files. The ACPICA headers should appear
6383 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
6385 any necessary compiler-specific defines, etc. Affects the ACPI-related
6389 Updated all ACPICA copyrights and signons to 2011. Added the 2011
6391 to all module headers and signons, including the Linux header. This
6393 virtually every file in the ACPICA core subsystem, iASL compiler, and all
6396 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
6397 project files for VC++ 6.0 are now obsolete. New project files can be
6399 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
6402 Example Code and Data Size: These are the sizes for the OS-independent
6403 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6404 debug version of the code includes the debug output trace mechanism and
6406 much larger code and data size.
6408 Previous Release (VC 6.0):
6409 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
6410 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
6411 Current Release (VC 9.0):
6412 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6413 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6415 2) iASL Compiler/Disassembler and Tools:
6417 iASL: Added generic data types to the Data Table compiler. Add "generic"
6419 types such as UINT32, String, Unicode, etc., to simplify the generation
6421 platform-defined tables such as UEFI. Lin Ming.
6423 iASL: Added listing support for the Data Table Compiler. Adds listing
6425 (-l) to display actual binary output for each line of input code.
6427 ----------------------------------------
6428 09 December 2010. Summary of changes for version 20101209:
6430 1) ACPI CA Core Subsystem:
6432 Completed the major overhaul of the GPE support code that was begun in
6434 2010. Major features include: removal of _PRW execution in ACPICA (host
6435 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
6436 changes to existing interfaces, simplification of GPE handler operation,
6438 a handful of new interfaces:
6444 One new file, evxfgpe.c to consolidate all external GPE interfaces.
6446 See the ACPICA Programmer Reference for full details and programming
6447 information. See the new section 4.4 "General Purpose Event (GPE)
6449 for a full overview, and section 8.7 "ACPI General Purpose Event
6451 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
6453 Bob Moore, Rafael Wysocki.
6455 Implemented a new GPE feature for Windows compatibility, the "Implicit
6457 GPE Notify". This feature will automatically issue a Notify(2) on a
6459 when a Wake GPE is received if there is no corresponding GPE method or
6460 handler. ACPICA BZ 870.
6462 Fixed a problem with the Scope() operator during table parse and load
6464 During load phase (table load or method execution), the scope operator
6466 not enter the target into the namespace. Instead, it should open a new
6468 at the target location. Linux BZ 19462, ACPICA BZ 882.
6470 Example Code and Data Size: These are the sizes for the OS-independent
6471 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6472 debug version of the code includes the debug output trace mechanism and
6474 much larger code and data size.
6477 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
6478 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
6480 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6481 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6483 2) iASL Compiler/Disassembler and Tools:
6485 iASL: Relax the alphanumeric restriction on _CID strings. These strings
6487 "bus-specific" per the ACPI specification, and therefore any characters
6489 acceptable. The only checks that can be performed are for a null string
6491 perhaps for a leading asterisk. ACPICA BZ 886.
6493 iASL: Fixed a problem where a syntax error that caused a premature EOF
6494 condition on the source file emitted a very confusing error message. The
6495 premature EOF is now detected correctly. ACPICA BZ 891.
6497 Disassembler: Decode the AccessSize within a Generic Address Structure
6499 access, word access, etc.) Note, this field does not allow arbitrary bit
6500 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
6502 New: AcpiNames utility - Example namespace dump utility. Shows an example
6504 ACPICA configuration for a minimal namespace dump utility. Uses table and
6505 namespace managers, but no AML interpreter. Does not add any
6507 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
6508 partition and configure ACPICA. ACPICA BZ 883.
6510 AML Debugger: Increased the debugger buffer size for method return
6512 Was 4K, increased to 16K. Also enhanced error messages for debugger
6514 execution, including the buffer overflow case.
6516 ----------------------------------------
6517 13 October 2010. Summary of changes for version 20101013:
6519 1) ACPI CA Core Subsystem:
6521 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
6523 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
6524 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
6526 Changed the type of the predefined namespace object _TZ from ThermalZone
6528 Device. This was found to be confusing to the host software that
6530 the various thermal zones, since _TZ is not really a ThermalZone.
6533 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
6536 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
6537 string is "Windows 2006 SP2".
6539 Eliminated duplicate code in AcpiUtExecute* functions. Now that the
6541 code automatically repairs _HID-related strings, this type of code is no
6542 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
6545 Example Code and Data Size: These are the sizes for the OS-independent
6546 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6547 debug version of the code includes the debug output trace mechanism and
6549 much larger code and data size.
6552 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6553 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6555 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6556 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6558 2) iASL Compiler/Disassembler and Tools:
6560 iASL: Implemented additional compile-time validation for _HID strings.
6562 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
6565 the string must be exactly seven or eight characters. For both _HID and
6567 strings, all characters must be alphanumeric. ACPICA BZ 874.
6569 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
6570 descriptors that are mostly or all zeros, with the expectation that they
6572 be filled in at runtime. iASL now allows this as long as there is a
6574 tag" (name) associated with the descriptor, which gives the ASL a handle
6575 needed to modify the descriptor. ACPICA BZ 873.
6577 Added single-thread support to the generic Unix application OSL.
6579 for iASL support, this change removes the use of semaphores in the
6581 threaded ACPICA tools/applications - increasing performance. The
6582 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
6583 option. ACPICA BZ 879.
6585 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
6587 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
6589 iASL: Moved all compiler messages to a new file, aslmessages.h.
6591 ----------------------------------------
6592 15 September 2010. Summary of changes for version 20100915:
6594 1) ACPI CA Core Subsystem:
6596 Removed the AcpiOsDerivePciId OSL interface. The various host
6598 of this function were not OS-dependent and are now obsolete and can be
6599 removed from all host OSLs. This function has been replaced by
6600 AcpiHwDerivePciId, which is now part of the ACPICA core code.
6601 AcpiHwDerivePciId has been implemented without recursion. Adds one new
6602 module, hwpci.c. ACPICA BZ 857.
6604 Implemented a dynamic repair for _HID and _CID strings. The following
6605 problems are now repaired at runtime: 1) Remove a leading asterisk in the
6606 string, and 2) the entire string is uppercased. Both repairs are in
6607 accordance with the ACPI specification and will simplify host driver
6611 The ACPI_THREAD_ID type is no longer configurable, internally it is now
6612 always UINT64. This simplifies the ACPICA code, especially any printf
6614 UINT64 is the only common data type for all thread_id types across all
6615 operating systems. It is now up to the host OSL to cast the native
6617 type to UINT64 before returning the value to ACPICA (via
6619 Lin Ming, Bob Moore.
6621 Added the ACPI_INLINE type to enhance the ACPICA configuration. The
6623 keyword is not standard across compilers, and this type allows inline to
6625 configured on a per-compiler basis. Lin Ming.
6627 Made the system global AcpiGbl_SystemAwakeAndRunning publically
6629 Added an extern for this boolean in acpixf.h. Some hosts utilize this
6631 during suspend/restore operations. ACPICA BZ 869.
6633 All code that implements error/warning messages with the "ACPI:" prefix
6635 been moved to a new module, utxferror.c.
6637 The UINT64_OVERLAY was moved to utmath.c, which is the only module where
6639 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
6641 Example Code and Data Size: These are the sizes for the OS-independent
6642 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6643 debug version of the code includes the debug output trace mechanism and
6645 much larger code and data size.
6648 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
6649 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
6651 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6652 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6654 2) iASL Compiler/Disassembler and Tools:
6656 iASL/Disassembler: Write ACPI errors to stderr instead of the output
6658 This keeps the output files free of random error messages that may
6660 from within the namespace/interpreter code. Used this opportunity to
6662 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
6663 866. Lin Ming, Bob Moore.
6665 Tools: update some printfs for ansi warnings on size_t. Handle width
6667 of size_t on 32-bit versus 64-bit generations. Lin Ming.
6669 ----------------------------------------
6670 06 August 2010. Summary of changes for version 20100806:
6672 1) ACPI CA Core Subsystem:
6674 Designed and implemented a new host interface to the _OSI support code.
6676 will allow the host to dynamically add or remove multiple _OSI strings,
6678 well as install an optional handler that is called for each _OSI
6680 Also added a new AML debugger command, 'osi' to display and modify the
6682 _OSI string table, and test support in the AcpiExec utility. See the
6684 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
6686 AcpiInstallInterface - Add an _OSI string.
6687 AcpiRemoveInterface - Delete an _OSI string.
6688 AcpiInstallInterfaceHandler - Install optional _OSI handler.
6690 AcpiOsValidateInterface - no longer used.
6692 source/components/utilities/utosi.c
6694 Re-introduced the support to enable multi-byte transfers for Embedded
6695 Controller (EC) operation regions. A reported problem was found to be a
6697 in the host OS, not in the multi-byte support. Previously, the maximum
6699 size passed to the EC operation region handler was a single byte. There
6701 often EC Fields larger than one byte that need to be transferred, and it
6703 useful for the EC driver to lock these as a single transaction. This
6705 enables single transfers larger than 8 bits. This effectively changes the
6706 access to the EC space from ByteAcc to AnyAcc, and will probably require
6707 changes to the host OS Embedded Controller driver to enable 16/32/64/256-
6709 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
6711 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
6712 prototype in acpiosxf.h had the output value pointer as a (void *).
6713 It should be a (UINT64 *). This may affect some host OSL code.
6715 Fixed a couple problems with the recently modified Linux makefiles for
6717 and AcpiExec. These new makefiles place the generated object files in the
6718 local directory so that there can be no collisions between the files that
6720 shared between them that are compiled with different options.
6722 Example Code and Data Size: These are the sizes for the OS-independent
6723 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6724 debug version of the code includes the debug output trace mechanism and
6726 much larger code and data size.
6729 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
6730 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
6732 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
6733 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
6735 2) iASL Compiler/Disassembler and Tools:
6737 iASL/Disassembler: Added a new option (-da, "disassemble all") to load
6739 namespace from and disassemble an entire group of AML files. Useful for
6740 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
6742 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
6744 iASL: Allow multiple invocations of -e option. This change allows
6746 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
6750 ----------------------------------------
6751 02 July 2010. Summary of changes for version 20100702:
6753 1) ACPI CA Core Subsystem:
6755 Implemented several updates to the recently added GPE reference count
6756 support. The model for "wake" GPEs is changing to give the host OS
6758 control of these GPEs. Eventually, the ACPICA core will not execute any
6760 methods, since the host already must execute them. Also, additional
6762 were made to help ensure that the reference counts are kept in proper
6763 synchronization with reality. Rafael J. Wysocki.
6765 1) Ensure that GPEs are not enabled twice during initialization.
6766 2) Ensure that GPE enable masks stay in sync with the reference count.
6767 3) Do not inadvertently enable GPEs when writing GPE registers.
6768 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
6769 interface. This interface will set or clear individual GPEs for wakeup.
6770 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These
6772 are now used for "runtime" GPEs only.
6774 Changed the behavior of the GPE install/remove handler interfaces. The
6777 no longer disabled during this process, as it was found to cause problems
6779 some machines. Rafael J. Wysocki.
6781 Reverted a change introduced in version 20100528 to enable Embedded
6782 Controller multi-byte transfers. This change was found to cause problems
6784 Index Fields and possibly Bank Fields. It will be reintroduced when these
6785 problems have been resolved.
6787 Fixed a problem with references to Alias objects within Package Objects.
6789 reference to an Alias within the definition of a Package was not always
6790 resolved properly. Aliases to objects like Processors, Thermal zones,
6792 were resolved to the actual object instead of a reference to the object
6795 should be. Package objects are only allowed to contain integer, string,
6796 buffer, package, and reference objects. Redhat bugzilla 608648.
6798 Example Code and Data Size: These are the sizes for the OS-independent
6799 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6800 debug version of the code includes the debug output trace mechanism and
6802 much larger code and data size.
6805 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
6806 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
6808 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
6809 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
6811 2) iASL Compiler/Disassembler and Tools:
6813 iASL: Implemented a new compiler subsystem to allow definition and
6814 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
6816 are called "ACPI Data Tables", and the new compiler is the "Data Table
6817 Compiler". This compiler is intended to simplify the existing error-prone
6818 process of creating these tables for the BIOS, as well as allowing the
6819 disassembly, modification, recompilation, and override of existing ACPI
6821 tables. See the iASL User Guide for detailed information.
6823 iASL: Implemented a new Template Generator option in support of the new
6825 Table Compiler. This option will create examples of all known ACPI tables
6826 that can be used as the basis for table development. See the iASL
6827 documentation and the -T option.
6829 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
6832 Updated the Linux makefiles for iASL and AcpiExec to place the generated
6833 object files in the local directory so that there can be no collisions
6834 between the shared files between them that are generated with different
6837 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
6839 the #define __APPLE__ to enable this support.
6841 ----------------------------------------
6842 28 May 2010. Summary of changes for version 20100528:
6844 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
6845 available at www.acpi.info. This is primarily an errata release.
6847 1) ACPI CA Core Subsystem:
6849 Undefined ACPI tables: We are looking for the definitions for the
6851 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
6853 Implemented support to enable multi-byte transfers for Embedded
6855 (EC) operation regions. Previously, the maximum data size passed to the
6857 operation region handler was a single byte. There are often EC Fields
6859 than one byte that need to be transferred, and it is useful for the EC
6861 to lock these as a single transaction. This change enables single
6863 larger than 8 bits. This effectively changes the access to the EC space
6865 ByteAcc to AnyAcc, and will probably require changes to the host OS
6867 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
6869 transfers. Alexey Starikovskiy, Lin Ming
6871 Implemented a performance enhancement for namespace search and access.
6873 change enhances the performance of namespace searches and walks by adding
6875 backpointer to the parent in each namespace node. On large namespaces,
6877 change can improve overall ACPI performance by up to 9X. Adding a pointer
6879 each namespace node increases the overall size of the internal namespace
6881 about 5%, since each namespace entry usually consists of both a namespace
6882 node and an ACPI operand object. However, this is the first growth of the
6883 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
6885 Implemented a performance optimization that reduces the number of
6887 walks. On control method exit, only walk the namespace if the method is
6889 to have created namespace objects outside of its local scope. Previously,
6891 entire namespace was traversed on each control method exit. This change
6893 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
6896 Added support to truncate I/O addresses to 16 bits for Windows
6898 Some ASL code has been seen in the field that inadvertently has bits set
6899 above bit 15. This feature is optional and is enabled if the BIOS
6901 any Windows OSI strings. It can also be enabled by the host OS. Matthew
6904 Added support to limit the maximum time for the ASL Sleep() operator. To
6905 prevent accidental deep sleeps, limit the maximum time that Sleep() will
6906 actually sleep. Configurable, the default maximum is two seconds. ACPICA
6909 Added run-time validation support for the _WDG and_WED Microsoft
6911 methods. These objects are defined by "Windows Instrumentation", and are
6913 part of the ACPI spec. ACPICA BZ 860.
6915 Expanded all statistic counters used during namespace and device
6916 initialization from 16 to 32 bits in order to support very large
6919 Replaced all instances of %d in printf format specifiers with %u since
6921 all integers in ACPICA are unsigned.
6923 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
6927 Example Code and Data Size: These are the sizes for the OS-independent
6928 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6929 debug version of the code includes the debug output trace mechanism and
6931 much larger code and data size.
6934 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
6935 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
6937 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
6938 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
6940 2) iASL Compiler/Disassembler and Tools:
6942 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
6943 methods. These objects are defined by "Windows Instrumentation", and are
6945 part of the ACPI spec. ACPICA BZ 860.
6947 AcpiExec: added option to disable the memory tracking mechanism. The -dt
6948 option will disable the tracking mechanism, which improves performance
6951 AcpiExec: Restructured the command line options into -d (disable) and -e
6954 ----------------------------------------
6955 28 April 2010. Summary of changes for version 20100428:
6957 1) ACPI CA Core Subsystem:
6959 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
6960 including FADT-based and GPE Block Devices, execute any _PRW methods in
6962 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
6963 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
6964 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
6965 Devices. Provides compatibility with other ACPI implementations. Two new
6966 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
6969 Fixed a regression introduced in version 20100331 within the table
6971 where initial table loading could fail. This was introduced in the fix
6973 AcpiReallocateRootTable. Also, renamed some of fields in the table
6975 data structures to clarify their meaning and use.
6977 Fixed a possible allocation overrun during internal object copy in
6978 AcpiUtCopySimpleObject. The original code did not correctly handle the
6980 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
6983 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
6984 possible access beyond end-of-allocation. Also, now fully validate
6986 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
6988 Example Code and Data Size: These are the sizes for the OS-independent
6989 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6990 debug version of the code includes the debug output trace mechanism and
6992 much larger code and data size.
6995 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
6996 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
6998 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
6999 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
7001 2) iASL Compiler/Disassembler and Tools:
7003 iASL: Implemented Min/Max/Len/Gran validation for address resource
7004 descriptors. This change implements validation for the address fields
7006 are common to all address-type resource descriptors. These checks are
7007 implemented: Checks for valid Min/Max, length within the Min/Max window,
7008 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
7010 table 6-40 in the ACPI 4.0a specification. Also split the large
7012 and aslrestype2.c files into five new files. ACPICA BZ 840.
7014 iASL: Added support for the _Wxx predefined names. This support was
7016 and these names were not recognized by the compiler as valid predefined
7017 names. ACPICA BZ 851.
7019 iASL: Added an error for all predefined names that are defined to return
7021 value and thus must be implemented as Control Methods. These include all
7023 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
7024 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
7026 iASL: Implemented the -ts option to emit hex AML data in ASL format, as
7028 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
7030 dynamically loaded via the Load() operator. Also cleaned up output for
7033 ta and -tc options. ACPICA BZ 853.
7035 Tests: Added a new file with examples of extended iASL error checking.
7036 Demonstrates the advanced error checking ability of the iASL compiler.
7037 Available at tests/misc/badcode.asl.
7039 ----------------------------------------
7040 31 March 2010. Summary of changes for version 20100331:
7042 1) ACPI CA Core Subsystem:
7044 Completed a major update for the GPE support in order to improve support
7046 shared GPEs and to simplify both host OS and ACPICA code. Added a
7048 count mechanism to support shared GPEs that require multiple device
7050 Several external interfaces have changed. One external interface has been
7051 removed. One new external interface was added. Most of the GPE external
7052 interfaces now use the GPE spinlock instead of the events mutex (and the
7053 Flags parameter for many GPE interfaces has been removed.) See the
7055 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
7057 Wysocki. ACPICA BZ 831.
7060 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
7066 Implemented write support for DataTable operation regions. These regions
7068 defined via the DataTableRegion() operator. Previously, only read support
7070 implemented. The ACPI specification allows DataTableRegions to be
7074 Implemented a new subsystem option to force a copy of the DSDT to local
7075 memory. Optionally copy the entire DSDT to local memory (instead of
7077 mapping it.) There are some (albeit very rare) BIOSs that corrupt or
7079 the original DSDT, creating the need for this option. Default is FALSE,
7083 Implemented detection of a corrupted or replaced DSDT. This change adds
7084 support to detect a DSDT that has been corrupted and/or replaced from
7086 the OS (by firmware). This is typically catastrophic for the system, but
7088 been seen on some machines. Once this problem has been detected, the DSDT
7089 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
7091 Fixed two problems with AcpiReallocateRootTable during the root table
7093 When copying the root table to the new allocation, the length used was
7094 incorrect. The new size was used instead of the current table size,
7096 too much data was copied. Also, the count of available slots for ACPI
7098 was not set correctly. Alexey Starikovskiy, Bob Moore.
7100 Example Code and Data Size: These are the sizes for the OS-independent
7101 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7102 debug version of the code includes the debug output trace mechanism and
7104 much larger code and data size.
7107 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
7108 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
7110 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
7111 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
7113 2) iASL Compiler/Disassembler and Tools:
7115 iASL: Implement limited typechecking for values returned from predefined
7116 control methods. The type of any returned static (unnamed) object is now
7117 validated. For example, Return(1). ACPICA BZ 786.
7119 iASL: Fixed a predefined name object verification regression. Fixes a
7121 introduced in version 20100304. An error is incorrectly generated if a
7122 predefined name is declared as a static named object with a value defined
7123 using the keywords "Zero", "One", or "Ones". Lin Ming.
7125 iASL: Added Windows 7 support for the -g option (get local ACPI tables)
7127 reducing the requested registry access rights. ACPICA BZ 842.
7129 Disassembler: fixed a possible fault when generating External()
7131 Introduced in commit ae7d6fd: Properly handle externals with parent-
7133 (carat). Fixes a string length allocation calculation. Lin Ming.
7135 ----------------------------------------
7136 04 March 2010. Summary of changes for version 20100304:
7138 1) ACPI CA Core Subsystem:
7140 Fixed a possible problem with the AML Mutex handling function
7141 AcpiExReleaseMutex where the function could fault under the very rare
7142 condition when the interpreter has blocked, the interpreter lock is
7144 the interpreter is then reentered via the same thread, and attempts to
7145 acquire an AML mutex that was previously acquired. FreeBSD report 140979.
7149 Implemented additional configuration support for the AML "Debug Object".
7150 Output from the debug object can now be enabled via a global variable,
7151 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
7153 This debug output is now available in the release version of ACPICA
7155 of just the debug version. Also, the entire debug output module can now
7157 configured out of the ACPICA build if desired. One new file added,
7158 executer/exdebug.c. Lin Ming, Bob Moore.
7160 Added header support for the ACPI MCHI table (Management Controller Host
7161 Interface Table). This table was added in ACPI 4.0, but the defining
7163 has only recently become available.
7165 Standardized output of integer values for ACPICA warnings/errors. Always
7167 0x prefix for hex output, always use %u for unsigned integer decimal
7169 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
7171 invocations.) These invocations were converted from the original
7172 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
7174 Example Code and Data Size: These are the sizes for the OS-independent
7175 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7176 debug version of the code includes the debug output trace mechanism and
7178 much larger code and data size.
7181 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
7182 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
7184 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
7185 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
7187 2) iASL Compiler/Disassembler and Tools:
7189 iASL: Implemented typechecking support for static (non-control method)
7190 predefined named objects that are declared with the Name() operator. For
7191 example, the type of this object is now validated to be of type Integer:
7192 Name(_BBN, 1). This change migrates the compiler to using the core
7194 name table instead of maintaining a local version. Added a new file,
7195 aslpredef.c. ACPICA BZ 832.
7197 Disassembler: Added support for the ACPI 4.0 MCHI table.
7199 ----------------------------------------
7200 21 January 2010. Summary of changes for version 20100121:
7202 1) ACPI CA Core Subsystem:
7204 Added the 2010 copyright to all module headers and signons. This affects
7205 virtually every file in the ACPICA core subsystem, the iASL compiler, the
7206 tools/utilities, and the test suites.
7208 Implemented a change to the AcpiGetDevices interface to eliminate
7210 invocations of the _STA method. In the case where a specific _HID is
7211 requested, do not run _STA until a _HID match is found. This eliminates
7212 potentially dozens of _STA calls during a search for a particular
7214 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
7216 Implemented an additional repair for predefined method return values.
7218 to repair unexpected NULL elements within returned Package objects.
7221 Integer of value zero, a NULL String, or a zero-length Buffer as
7223 ACPICA BZ 818. Lin Ming, Bob Moore.
7225 Removed the obsolete ACPI_INTEGER data type. This type was introduced as
7227 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
7229 64-bit AML integers). It is now obsolete and this change removes it from
7231 ACPICA code base, replaced by UINT64. The original typedef has been
7233 for now for compatibility with existing device driver code. ACPICA BZ
7236 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
7238 the parse tree object.
7240 Added additional warning options for the gcc-4 generation. Updated the
7242 accordingly. This includes some code restructuring to eliminate
7244 code, elimination of some gotos, elimination of unused return values,
7246 additional casting, and removal of redundant declarations.
7248 Example Code and Data Size: These are the sizes for the OS-independent
7249 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7250 debug version of the code includes the debug output trace mechanism and
7252 much larger code and data size.
7255 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
7256 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
7258 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
7259 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
7261 2) iASL Compiler/Disassembler and Tools:
7263 No functional changes for this release.
7265 ----------------------------------------
7266 14 December 2009. Summary of changes for version 20091214:
7268 1) ACPI CA Core Subsystem:
7270 Enhanced automatic data type conversions for predefined name repairs.
7272 change expands the automatic repairs/conversions for predefined name
7274 values to make Integers, Strings, and Buffers fully interchangeable.
7277 Buffer can be converted to a Package of Integers if necessary. The
7279 module was completely restructured. Lin Ming, Bob Moore.
7281 Implemented automatic removal of null package elements during predefined
7283 repairs. This change will automatically remove embedded and trailing NULL
7284 package elements from returned package objects that are defined to
7287 variable number of sub-packages. The driver is then presented with a
7289 with no null elements to deal with. ACPICA BZ 819.
7291 Implemented a repair for the predefined _FDE and _GTM names. The expected
7292 return value for both names is a Buffer of 5 DWORDs. This repair fixes
7294 possible problems (both seen in the field), where a package of integers
7296 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
7299 Implemented additional module-level code support. This change will
7301 execute module-level code that is not at the root of the namespace (under
7303 Device object, etc.). Now executes the code within the current scope
7305 of the root. ACPICA BZ 762. Lin Ming.
7307 Fixed possible mutex acquisition errors when running _REG methods. Fixes
7309 problem where mutex errors can occur when running a _REG method that is
7311 the same scope as a method-defined operation region or an operation
7313 under a module-level IF block. This type of code is rare, so the problem
7315 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
7317 Fixed a possible memory leak during module-level code execution. An
7319 could be leaked for each block of executed module-level code if the
7320 interpreter slack mode is enabled This change deletes any implicitly
7322 object from the module-level code block. Lin Ming.
7324 Removed messages for successful predefined repair(s). The repair
7326 was considered too wordy. Now, messages are only unconditionally emitted
7328 the return object cannot be repaired. Existing messages for successful
7329 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
7332 Example Code and Data Size: These are the sizes for the OS-independent
7333 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7334 debug version of the code includes the debug output trace mechanism and
7336 much larger code and data size.
7339 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
7340 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
7342 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
7343 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
7345 2) iASL Compiler/Disassembler and Tools:
7347 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
7349 were no longer automatically removed at the termination of the compile.
7351 acpiexec: Implemented the -f option to specify default region fill value.
7352 This option specifies the value used to initialize buffers that simulate
7353 operation regions. Default value is zero. Useful for debugging problems
7355 depend on a specific initial value for a region or field.
7357 ----------------------------------------
7358 12 November 2009. Summary of changes for version 20091112:
7360 1) ACPI CA Core Subsystem:
7362 Implemented a post-order callback to AcpiWalkNamespace. The existing
7363 interface only has a pre-order callback. This change adds an additional
7364 parameter for a post-order callback which will be more useful for bus
7366 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
7368 Modified the behavior of the operation region memory mapping cache for
7369 SystemMemory. Ensure that the memory mappings created for operation
7371 do not cross 4K page boundaries. Crossing a page boundary while mapping
7372 regions can cause kernel warnings on some hosts if the pages have
7374 attributes. Such regions are probably BIOS bugs, and this is the
7376 Linux BZ 14445. Lin Ming.
7378 Implemented an automatic repair for predefined methods that must return
7379 sorted lists. This change will repair (by sorting) packages returned by
7381 _PSS, and _TSS. Drivers can now assume that the packages are correctly
7383 and do not contain NULL package elements. Adds one new file,
7384 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
7386 Fixed a possible fault during predefined name validation if a return
7388 object contains NULL elements. Also adds a warning if a NULL element is
7389 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
7391 include repair or removal of all such NULL elements where possible.
7393 Implemented additional module-level executable AML code support. This
7395 will execute module-level code that is not at the root of the namespace
7396 (under a Device object, etc.) at table load time. Module-level executable
7398 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
7400 Implemented a new internal function to create Integer objects. This
7402 simplifies miscellaneous object creation code. ACPICA BZ 823.
7404 Reduced the severity of predefined repair messages, Warning to Info.
7406 the object was successfully repaired, a warning is too severe. Reduced to
7408 info message for now. These messages may eventually be changed to debug-
7412 Example Code and Data Size: These are the sizes for the OS-independent
7413 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7414 debug version of the code includes the debug output trace mechanism and
7416 much larger code and data size.
7419 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
7420 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
7422 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
7423 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
7425 2) iASL Compiler/Disassembler and Tools:
7427 iASL: Implemented Switch() with While(1) so that Break works correctly.
7429 change correctly implements the Switch operator with a surrounding
7431 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
7433 iASL: Added a message if a package initializer list is shorter than
7435 length. Adds a new remark for a Package() declaration if an initializer
7437 exists, but is shorter than the declared length of the package. Although
7438 technically legal, this is probably a coding error and it is seen in the
7439 field. ACPICA BZ 815. Lin Ming, Bob Moore.
7441 iASL: Fixed a problem where the compiler could fault after the maximum
7443 of errors was reached (200).
7445 acpixtract: Fixed a possible warning for pointer cast if the compiler
7447 level set very high.
7449 ----------------------------------------
7450 13 October 2009. Summary of changes for version 20091013:
7452 1) ACPI CA Core Subsystem:
7454 Fixed a problem where an Operation Region _REG method could be executed
7456 than once. If a custom address space handler is installed by the host
7458 the "initialize operation regions" phase of the ACPICA initialization,
7460 _REG methods for that address space could be executed twice. This change
7461 fixes the problem. ACPICA BZ 427. Lin Ming.
7463 Fixed a possible memory leak for the Scope() ASL operator. When the exact
7464 invocation of "Scope(\)" is executed (change scope to root), one internal
7465 operand object was leaked. Lin Ming.
7467 Implemented a run-time repair for the _MAT predefined method. If the _MAT
7468 return value is defined as a Field object in the AML, and the field
7469 size is less than or equal to the default width of an integer (32 or
7471 can incorrectly return an Integer instead of a Buffer. ACPICA now
7472 automatically repairs this problem. ACPICA BZ 810.
7474 Implemented a run-time repair for the _BIF and _BIX predefined methods.
7476 "OEM Information" field is often incorrectly returned as an Integer with
7477 value zero if the field is not supported by the platform. This is due to
7479 ambiguity in the ACPI specification. The field should always be a string.
7480 ACPICA now automatically repairs this problem by returning a NULL string
7481 within the returned Package. ACPICA BZ 807.
7483 Example Code and Data Size: These are the sizes for the OS-independent
7484 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7485 debug version of the code includes the debug output trace mechanism and
7487 much larger code and data size.
7490 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
7491 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
7493 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
7494 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
7496 2) iASL Compiler/Disassembler and Tools:
7498 Disassembler: Fixed a problem where references to external symbols that
7499 contained one or more parent-prefixes (carats) were not handled
7501 possibly causing a fault. ACPICA BZ 806. Lin Ming.
7503 Disassembler: Restructured the code so that all functions that handle
7504 external symbols are in a single module. One new file is added,
7507 AML Debugger: Added a max count argument for the Batch command (which
7508 executes multiple predefined methods within the namespace.)
7510 iASL: Updated the compiler documentation (User Reference.) Available at
7511 http://www.acpica.org/documentation/. ACPICA BZ 750.
7513 AcpiXtract: Updated for Lint and other formatting changes. Close all open
7516 ----------------------------------------
7517 03 September 2009. Summary of changes for version 20090903:
7519 1) ACPI CA Core Subsystem:
7521 For Windows Vista compatibility, added the automatic execution of an _INI
7522 method located at the namespace root (\_INI). This method is executed at
7523 table load time. This support is in addition to the automatic execution
7525 \_SB._INI. Lin Ming.
7527 Fixed a possible memory leak in the interpreter for AML package objects
7529 the package initializer list is longer than the defined size of the
7531 This apparently can only happen if the BIOS changes the package size on
7533 fly (seen in a _PSS object), as ASL compilers do not allow this. The
7534 interpreter will truncate the package to the defined size (and issue an
7536 message), but previously could leave the extra objects undeleted if they
7538 pre-created during the argument processing (such is the case if the
7540 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
7542 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
7543 This has been reported in the field. Previously, ACPICA would zero out
7545 buffer/string. Now, the operation is treated as a noop. Provides Windows
7546 compatibility. ACPICA BZ 803. Lin Ming.
7548 Removed an extraneous error message for ASL constructs of the form
7549 Store(LocalX,LocalX) when LocalX is uninitialized. These curious
7551 are seen in many BIOSs and are once again treated as NOOPs and no error
7553 emitted when they are encountered. ACPICA BZ 785.
7555 Fixed an extraneous warning message if a _DSM reserved method returns a
7556 Package object. _DSM can return any type of object, so validation on the
7557 return type cannot be performed. ACPICA BZ 802.
7559 Example Code and Data Size: These are the sizes for the OS-independent
7560 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7561 debug version of the code includes the debug output trace mechanism and
7563 much larger code and data size.
7566 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
7567 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
7569 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
7570 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
7572 2) iASL Compiler/Disassembler and Tools:
7574 iASL: Fixed a problem with the use of the Alias operator and Resource
7575 Templates. The correct alias is now constructed and no error is emitted.
7578 iASL: Implemented the -I option to specify additional search directories
7580 include files. Allows multiple additional search paths for include files.
7581 Directories are searched in the order specified on the command line
7583 the local directory is searched.) ACPICA BZ 800.
7585 iASL: Fixed a problem where the full pathname for include files was not
7586 emitted for warnings/errors. This caused the IDE support to not work
7587 properly. ACPICA BZ 765.
7589 iASL: Implemented the -@ option to specify a Windows-style response file
7590 containing additional command line options. ACPICA BZ 801.
7592 AcpiExec: Added support to load multiple AML files simultaneously (such
7595 DSDT and multiple SSDTs). Also added support for wildcards within the AML
7596 pathname. These features allow all machine tables to be easily loaded and
7597 debugged together. ACPICA BZ 804.
7599 Disassembler: Added missing support for disassembly of HEST table Error
7603 ----------------------------------------
7604 30 July 2009. Summary of changes for version 20090730:
7606 The ACPI 4.0 implementation for ACPICA is complete with this release.
7608 1) ACPI CA Core Subsystem:
7610 ACPI 4.0: Added header file support for all new and changed ACPI tables.
7611 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
7613 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
7615 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
7617 have been some ACPI 4.0 changes to other existing tables. Split the large
7618 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
7620 ACPI 4.0: Implemented predefined name validation for all new names. There
7622 31 new names in ACPI 4.0. The predefined validation module was split into
7624 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
7626 Implemented support for so-called "module-level executable code". This is
7627 executable AML code that exists outside of any control method and is
7629 to be executed at table load time. Although illegal since ACPI 2.0, this
7631 of code still exists and is apparently still being created. Blocks of
7633 code are now detected and executed as intended. Currently, the code
7635 must exist under either an If, Else, or While construct; these are the
7636 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
7638 Implemented an automatic dynamic repair for predefined names that return
7639 nested Package objects. This applies to predefined names that are defined
7641 return a variable-length Package of sub-packages. If the number of sub-
7642 packages is one, BIOS code is occasionally seen that creates a simple
7644 package with no sub-packages. This code attempts to fix the problem by
7645 wrapping a new package object around the existing package. These methods
7647 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
7651 Fixed a regression introduced in 20090625 for the AcpiGetDevices
7653 The _HID/_CID matching was broken and no longer matched IDs correctly.
7657 Fixed a problem with AcpiReset where the reset would silently fail if the
7658 register was one of the protected I/O ports. AcpiReset now bypasses the
7660 validation mechanism. This may eventually be driven into the
7664 Fixed a regression related to the recent update of the AcpiRead/Write
7665 interfaces. A sleep/suspend could fail if the optional PM2 Control
7667 does not exist during an attempt to write the Bus Master Arbitration bit.
7668 (However, some hosts already delete the code that writes this bit, and
7670 code may in fact be obsolete at this date.) ACPICA BZ 799.
7672 Fixed a problem where AcpiTerminate could fault if inadvertently called
7674 in succession. ACPICA BZ 795.
7676 Example Code and Data Size: These are the sizes for the OS-independent
7677 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7678 debug version of the code includes the debug output trace mechanism and
7680 much larger code and data size.
7683 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
7684 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
7686 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
7687 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
7689 2) iASL Compiler/Disassembler and Tools:
7691 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
7692 changes to existing tables. ACPICA BZ 775.
7694 ----------------------------------------
7695 25 June 2009. Summary of changes for version 20090625:
7697 The ACPI 4.0 Specification was released on June 16 and is available at
7698 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
7699 continue for the next few releases.
7701 1) ACPI CA Core Subsystem:
7703 ACPI 4.0: Implemented interpreter support for the IPMI operation region
7704 address space. Includes support for bi-directional data buffers and an
7706 address space handler (to be installed by an IPMI device driver.) ACPICA
7710 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
7712 support in both the header files and the disassembler.
7714 Completed a major update for the AcpiGetObjectInfo external interface.
7716 - Support for variable, unlimited length HID, UID, and CID strings.
7717 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
7719 - Call the _SxW power methods on behalf of a device object.
7720 - Determine if a device is a PCI root bridge.
7721 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
7722 These changes will require an update to all callers of this interface.
7724 the updated ACPICA Programmer Reference for details. One new source file
7726 been added - utilities/utids.c. ACPICA BZ 368, 780.
7728 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
7729 transfers. The Value parameter has been extended from 32 bits to 64 bits
7731 order to support new ACPI 4.0 tables. These changes will require an
7734 all callers of these interfaces. See the ACPICA Programmer Reference for
7735 details. ACPICA BZ 768.
7737 Fixed several problems with AcpiAttachData. The handler was not invoked
7739 the host node was deleted. The data sub-object was not automatically
7741 when the host node was deleted. The interface to the handler had an
7743 parameter, this was removed. ACPICA BZ 778.
7745 Enhanced the function that dumps ACPI table headers. All non-printable
7746 characters in the string fields are now replaced with '?' (Signature,
7748 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
7749 these fields are occasionally seen in the field. ACPICA BZ 788.
7751 Fixed a problem with predefined method repair code where the code that
7752 attempts to repair/convert an object of incorrect type is only executed
7754 the first time the predefined method is called. The mechanism that
7756 warnings on subsequent calls was interfering with the repair mechanism.
7759 Fixed a possible memory leak in the predefined validation/repair code
7762 buffer is automatically converted to an expected string object.
7764 Removed obsolete 16-bit files from the distribution and from the current
7766 tree head. ACPICA BZ 776.
7768 Example Code and Data Size: These are the sizes for the OS-independent
7769 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7770 debug version of the code includes the debug output trace mechanism and
7772 much larger code and data size.
7775 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
7776 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
7778 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
7779 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
7781 2) iASL Compiler/Disassembler and Tools:
7783 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
7784 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
7786 ACPI 4.0: iASL - implemented compile-time validation support for all new
7787 predefined names and control methods (31 total). ACPICA BZ 769.
7789 ----------------------------------------
7790 21 May 2009. Summary of changes for version 20090521:
7792 1) ACPI CA Core Subsystem:
7794 Disabled the preservation of the SCI enable bit in the PM1 control
7796 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
7799 a "preserved" bit - "OSPM always preserves this bit position", section
7800 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
7801 because the bit needs to be explicitly set by the OS as a workaround. No
7802 machines fail if the bit is not preserved. Therefore, ACPICA no longer
7803 attempts to preserve this bit.
7805 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
7806 incorrectly formed _PRT package could cause a fault. Added validation to
7807 ensure that each package element is actually a sub-package.
7809 Implemented a new interface to install or override a single control
7811 AcpiInstallMethod. This interface is useful when debugging in order to
7813 an existing method or to install a missing method without having to
7815 the entire ACPI table. See the ACPICA Programmer Reference for use and
7816 examples. Lin Ming, Bob Moore.
7818 Fixed several reference count issues with the DdbHandle object that is
7819 created from a Load or LoadTable operator. Prevent premature deletion of
7821 object. Also, mark the object as invalid once the table has been
7823 This is needed because the handle itself may not be deleted after the
7825 unload, depending on whether it has been stored in a named object by the
7828 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
7829 mutexes of the same sync level are acquired but then not released in
7831 opposite order, the internally maintained Current Sync Level becomes
7833 and can cause subsequent execution errors. ACPICA BZ 471.
7835 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
7836 specification has been changed to make the SyncLevel for mutex objects
7838 useful. When releasing a mutex, the SyncLevel of the mutex must now be
7840 same as the current sync level. This makes more sense than the previous
7842 (SyncLevel less than or equal). This change updates the code to match the
7845 Fixed a problem with the local version of the AcpiOsPurgeCache function.
7847 (local) cache must be locked during all cache object deletions. Andrew
7850 Updated the Load operator to use operation region interfaces. This
7852 direct memory mapping with region access calls. Now, all region accesses
7854 through the installed region handler as they should.
7856 Simplified and optimized the NsGetNextNode function. Reduced parameter
7858 and reduced code for this frequently used function.
7860 Example Code and Data Size: These are the sizes for the OS-independent
7861 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7862 debug version of the code includes the debug output trace mechanism and
7864 much larger code and data size.
7867 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
7868 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
7870 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
7871 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
7873 2) iASL Compiler/Disassembler and Tools:
7875 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
7877 with sub-table disassembly and handling invalid sub-tables. Attempt
7879 after an invalid sub-table ID.
7881 ----------------------------------------
7882 22 April 2009. Summary of changes for version 20090422:
7884 1) ACPI CA Core Subsystem:
7886 Fixed a compatibility issue with the recently released I/O port
7888 mechanism. For windows compatibility, 1) On a port protection violation,
7889 simply ignore the request and do not return an exception (allow the
7891 method to continue execution.) 2) If only part of the request overlaps a
7892 protected port, read/write the individual ports that are not protected.
7896 Enhanced the execution of the ASL/AML BreakPoint operator so that it
7898 breaks into the AML debugger if the debugger is present. This matches the
7899 ACPI-defined behavior.
7901 Fixed several possible warnings related to the use of the configurable
7902 ACPI_THREAD_ID. This type can now be configured as either an integer or a
7903 pointer with no warnings. Also fixes several warnings in printf-like
7904 statements for the 64-bit build when the type is configured as a pointer.
7907 Fixed a number of possible warnings when compiling with gcc 4+ (depending
7909 warning options.) Examples include printf formats, aliasing, unused
7911 missing prototypes, missing switch default statements, use of non-ANSI
7912 library functions, use of non-ANSI constructs. See generate/unix/Makefile
7914 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
7916 Example Code and Data Size: These are the sizes for the OS-independent
7917 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7918 debug version of the code includes the debug output trace mechanism and
7920 much larger code and data size.
7923 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
7924 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
7926 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
7927 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
7929 2) iASL Compiler/Disassembler and Tools:
7931 iASL: Fixed a generation warning from Bison 2.3 and fixed several
7936 iASL: Fixed a problem where the Unix/Linux versions of the compiler could
7938 correctly digest Windows/DOS formatted files (with CR/LF).
7940 iASL: Added a new option for "quiet mode" (-va) that produces only the
7941 compilation summary, not individual errors and warnings. Useful for large
7944 AcpiExec: Implemented a new option (-z) to enable a forced
7946 timeout that can be used to detect hang conditions during execution of
7948 code (includes both internal semaphores and AML-defined mutexes and
7951 Added new makefiles for the generation of acpica in a generic unix-like
7952 environment. These makefiles are intended to generate the acpica tools
7954 utilities from the original acpica git source tree structure.
7956 Test Suites: Updated and cleaned up the documentation files. Updated the
7957 copyrights to 2009, affecting all source files. Use the new version of
7959 with quiet mode. Increased the number of available semaphores in the
7961 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
7963 an alternate implementation of the semaphore timeout to allow aslts to
7964 execute fully on Cygwin.
7966 ----------------------------------------
7967 20 March 2009. Summary of changes for version 20090320:
7969 1) ACPI CA Core Subsystem:
7971 Fixed a possible race condition between AcpiWalkNamespace and dynamic
7973 unloads. Added a reader/writer locking mechanism to allow multiple
7975 namespace walks (readers), but block a dynamic table unload until it can
7977 exclusive write access to the namespace. This fixes a problem where a
7979 unload could (possibly catastrophically) delete the portion of the
7981 that is currently being examined by a walk. Adds a new file, utlock.c,
7983 implements the reader/writer lock mechanism. ACPICA BZ 749.
7985 Fixed a regression introduced in version 20090220 where a change to the
7987 handling could cause the ACPICA subsystem to access non-existent I/O
7990 Modified the handling of FADT register and table (FACS/DSDT) addresses.
7992 FADT can contain both 32-bit and 64-bit versions of these addresses.
7993 Previously, the 64-bit versions were favored, meaning that if both 32 and
7995 versions were valid, but not equal, the 64-bit version was used. This was
7996 found to cause some machines to fail. Now, in this case, the 32-bit
7998 is used instead. This now matches the Windows behavior.
8000 Implemented a new mechanism to protect certain I/O ports. Provides
8002 compatibility and protects the standard PC I/O ports from access via AML
8003 code. Adds a new file, hwvalid.c
8005 Fixed a possible extraneous warning message from the FADT support. The
8006 message warns of a 32/64 length mismatch between the legacy and GAS
8007 definitions for a register.
8009 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
8011 made obsolete by the port protection mechanism above. It was previously
8013 to validate the entire address range of an operation region, which could
8015 incorrect if the range included illegal ports, but fields within the
8016 operation region did not actually access those ports. Validation is now
8017 performed on a per-field basis instead of the entire region.
8019 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
8020 Ignored bits must be "preserved" according to the ACPI spec. Usually,
8022 means a read/modify/write when writing to the register. However, for
8024 registers, writing a one means clear the event. Writing a zero means
8026 the event (do not clear.) This behavior is clarified in the ACPI 4.0
8028 and the ACPICA code now simply always writes a zero to the ignored bit.
8030 Modified the handling of ignored bits for the PM1 A/B Control Registers.
8032 per the ACPI specification, for the control registers, preserve
8033 (read/modify/write) all bits that are defined as either reserved or
8036 Updated the handling of write-only bits in the PM1 A/B Control Registers.
8037 When reading the register, zero the write-only bits as per the ACPI spec.
8038 ACPICA BZ 443. Lin Ming.
8040 Removed "Linux" from the list of supported _OSI strings. Linux no longer
8041 wants to reply true to this request. The Windows strings are the only
8043 through the AML that are tested and known to work properly.
8046 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
8047 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
8049 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
8050 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
8052 2) iASL Compiler/Disassembler and Tools:
8054 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
8058 ----------------------------------------
8059 20 February 2009. Summary of changes for version 20090220:
8061 1) ACPI CA Core Subsystem:
8063 Optimized the ACPI register locking. Removed locking for reads from the
8065 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
8067 not required when reading the single-bit registers. The
8068 AcpiGetRegisterUnlocked function is no longer needed and has been
8070 This will improve performance for reads on these registers. ACPICA BZ
8073 Fixed the parameter validation for AcpiRead/Write. Now return
8074 AE_BAD_PARAMETER if the input register pointer is null, and
8077 the register has an address of zero. Previously, these cases simply
8079 AE_OK. For optional registers such as PM1B status/enable/control, the
8081 should check for a valid register address before calling. ACPICA BZ 748.
8083 Renamed the external ACPI bit register access functions. Renamed
8084 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
8085 functions. The new names are AcpiReadBitRegister and
8086 AcpiWriteBitRegister.
8087 Also, restructured the code for these functions by simplifying the code
8089 and condensing duplicate code to reduce code size.
8091 Added new functions to transparently handle the possibly split PM1 A/B
8092 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
8094 now handle the split registers for PM1 Status, Enable, and Control.
8099 Added a function to handle the PM1 control registers,
8100 AcpiHwWritePm1Control.
8101 This function writes both of the PM1 control registers (A/B). These
8103 are different than the PM1 A/B status and enable registers in that
8105 values can be written to the A/B registers. Most notably, the SLP_TYP
8107 can be different, as per the values returned from the _Sx predefined
8110 Removed an extra register write within AcpiHwClearAcpiStatus. This
8112 was writing an optional PM1B status register twice. The existing call to
8114 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
8116 register. ACPICA BZ 751.
8118 Split out the PM1 Status registers from the FADT. Added new globals for
8120 registers (A/B), similar to the way the PM1 Enable registers are handled.
8121 Instead of overloading the FADT Event Register blocks. This makes the
8123 clearer and less prone to error.
8125 Fixed the warning message for when the platform contains too many ACPI
8127 for the default size of the global root table data structure. The
8129 for the truncation value was incorrect.
8131 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
8132 obsolete macro, since it is now a simple reference to ->common.type.
8134 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
8136 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
8137 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
8138 simply SLEEP_TYPE. ACPICA BZ 754.
8140 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
8141 function is only needed on 64-bit host operating systems and is thus not
8142 included for 32-bit hosts.
8144 Debug output: print the input and result for invocations of the _OSI
8146 control method via the ACPI_LV_INFO debug level. Also, reduced some of
8148 verbosity of this debug level. Len Brown.
8150 Example Code and Data Size: These are the sizes for the OS-independent
8151 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8152 debug version of the code includes the debug output trace mechanism and
8154 much larger code and data size.
8157 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
8158 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
8160 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
8161 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
8163 2) iASL Compiler/Disassembler and Tools:
8165 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
8166 various legal performance profiles.
8168 ----------------------------------------
8169 23 January 2009. Summary of changes for version 20090123:
8171 1) ACPI CA Core Subsystem:
8173 Added the 2009 copyright to all module headers and signons. This affects
8174 virtually every file in the ACPICA core subsystem, the iASL compiler, and
8175 the tools/utilities.
8177 Implemented a change to allow the host to override any ACPI table,
8179 dynamically loaded tables. Previously, only the DSDT could be replaced by
8181 host. With this change, the AcpiOsTableOverride interface is called for
8183 table found in the RSDT/XSDT during ACPICA initialization, and also
8185 a table is dynamically loaded via the AML Load operator.
8187 Updated FADT flag definitions, especially the Boot Architecture flags.
8189 Debugger: For the Find command, automatically pad the input ACPI name
8191 underscores if the name is shorter than 4 characters. This enables a
8193 with the actual namespace entry which is itself padded with underscores.
8195 Example Code and Data Size: These are the sizes for the OS-independent
8196 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8197 debug version of the code includes the debug output trace mechanism and
8199 much larger code and data size.
8202 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
8203 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
8205 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
8206 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
8208 2) iASL Compiler/Disassembler and Tools:
8210 Fix build error under Bison-2.4.
8212 Dissasembler: Enhanced FADT support. Added decoding of the Boot
8214 flags. Now decode all flags, regardless of the FADT version. Flag output
8215 includes the FADT version which first defined each flag.
8217 The iASL -g option now dumps the RSDT to a file (in addition to the FADT
8219 DSDT). Windows only.
8221 ----------------------------------------
8222 04 December 2008. Summary of changes for version 20081204:
8224 1) ACPI CA Core Subsystem:
8226 The ACPICA Programmer Reference has been completely updated and revamped
8228 this release. This includes updates to the external interfaces, OSL
8229 interfaces, the overview sections, and the debugger reference.
8231 Several new ACPICA interfaces have been implemented and documented in the
8232 programmer reference:
8233 AcpiReset - Writes the reset value to the FADT-defined reset register.
8234 AcpiDisableAllGpes - Disable all available GPEs.
8235 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
8236 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
8237 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
8238 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
8239 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
8241 Most of the public ACPI hardware-related interfaces have been moved to a
8243 file, components/hardware/hwxface.c
8245 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
8246 register lengths within the FADT are now used, and the low level ACPI
8247 register access no longer hardcodes the ACPI register lengths. Given that
8248 there may be some risk in actually trusting the FADT register lengths, a
8250 time option was added to fall back to the default hardcoded lengths if
8252 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
8253 option is set to true for now, and a warning is issued if a suspicious
8255 register length is overridden with the default value.
8257 Fixed a reference count issue in NsRepairObject. This problem was
8259 in version 20081031 as part of a fix to repair Buffer objects within
8262 Added semaphore support to the Linux/Unix application OS-services layer
8263 (OSL). ACPICA BZ 448. Lin Ming.
8265 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
8267 be implemented in the OSL, or will binary semaphores be used instead.
8269 Example Code and Data Size: These are the sizes for the OS-independent
8270 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8271 debug version of the code includes the debug output trace mechanism and
8273 much larger code and data size.
8276 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
8277 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
8279 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
8280 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
8282 2) iASL Compiler/Disassembler and Tools:
8284 iASL: Completed the '-e' option to include additional ACPI tables in
8287 aid with disassembly and External statement generation. ACPICA BZ 742.
8291 iASL: Removed the "named object in while loop" error. The compiler cannot
8292 determine how many times a loop will execute. ACPICA BZ 730.
8294 Disassembler: Implemented support for FADT revision 2 (MS extension).
8298 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
8301 ----------------------------------------
8302 31 October 2008. Summary of changes for version 20081031:
8304 1) ACPI CA Core Subsystem:
8306 Restructured the ACPICA header files into public/private. acpi.h now
8308 only the "public" acpica headers. All other acpica headers are "private"
8310 should not be included by acpica users. One new file, accommon.h is used
8312 include the commonly used private headers for acpica code generation.
8314 plans include moving all private headers to a new subdirectory.
8316 Implemented an automatic Buffer->String return value conversion for
8317 predefined ACPI methods. For these methods (such as _BIF), added
8319 conversion for return objects that are required to be a String, but a
8321 was found instead. This can happen when reading string battery data from
8323 operation region, because it used to be difficult to convert the data
8325 buffer to string from within the ASL. Ensures that the host OS is
8327 with a valid null-terminated string. Linux BZ 11822.
8329 Updated the FACS waking vector interfaces. Split
8330 AcpiSetFirmwareWakingVector
8331 into two: one for the 32-bit vector, another for the 64-bit vector. This
8333 required because the host OS must setup the wake much differently for
8335 vector (real vs. protected mode, etc.) and the interface itself should
8338 deciding which vector to use. Also, eliminated the
8339 GetFirmwareWakingVector
8340 interface, as it served no purpose (only the firmware reads the vector,
8342 only writes the vector.) ACPICA BZ 731.
8344 Implemented a mechanism to escape infinite AML While() loops. Added a
8346 counter to force exit from AML While loops if the count becomes too
8348 This can occur in poorly written AML when the hardware does not respond
8349 within a while loop and the loop does not implement a timeout. The
8351 loop count is configurable. A new exception code is returned when a loop
8353 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
8355 Optimized the execution of AML While loops. Previously, a control state
8356 object was allocated and freed for each execution of the loop. The
8357 optimization is to simply reuse the control state for each iteration.
8359 speeds up the raw loop execution time by about 5%.
8361 Enhanced the implicit return mechanism. For Windows compatibility, return
8363 implicit integer of value zero for methods that contain no executable
8365 Such methods are seen in the field as stubs (presumably), and can cause
8366 drivers to fail if they expect a return value. Lin Ming.
8368 Allow multiple backslashes as root prefixes in namepaths. In a fully
8369 qualified namepath, allow multiple backslash prefixes. This can happen
8371 is seen in the field) because of the use of a double-backslash in strings
8372 (since backslash is the escape character) causing confusion. ACPICA BZ
8376 Emit a warning if two different FACS or DSDT tables are discovered in the
8377 FADT. Checks if there are two valid but different addresses for the FACS
8379 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
8381 Consolidated the method argument count validation code. Merged the code
8383 validates control method argument counts into the predefined validation
8384 module. Eliminates possible multiple warnings for incorrect argument
8387 Implemented ACPICA example code. Includes code for ACPICA initialization,
8388 handler installation, and calling a control method. Available at
8389 source/tools/examples.
8391 Added a global pointer for FACS table to simplify internal FACS access.
8393 the global pointer instead of using AcpiGetTableByIndex for each FACS
8395 This simplifies the code for the Global Lock and the Firmware Waking
8398 Example Code and Data Size: These are the sizes for the OS-independent
8399 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8400 debug version of the code includes the debug output trace mechanism and
8402 much larger code and data size.
8405 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
8406 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
8408 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
8409 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
8411 2) iASL Compiler/Disassembler and Tools:
8413 iASL: Improved disassembly of external method calls. Added the -e option
8415 allow the inclusion of additional ACPI tables to help with the
8418 method invocations and the generation of external declarations during the
8419 disassembly. Certain external method invocations cannot be disassembled
8420 properly without the actual declaration of the method. Use the -e option
8422 include the table where the external method(s) are actually declared.
8424 useful for disassembling SSDTs that make method calls back to the master
8425 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl
8427 -e dsdt.aml ssdt1.aml
8429 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
8430 problem where the use of an alias within a namepath would result in a not
8431 found error or cause the compiler to fault. Also now allows forward
8432 references from the Alias operator itself. ACPICA BZ 738.
8434 ----------------------------------------
8435 26 September 2008. Summary of changes for version 20080926:
8437 1) ACPI CA Core Subsystem:
8439 Designed and implemented a mechanism to validate predefined ACPI methods
8441 objects. This code validates the predefined ACPI objects (objects whose
8443 start with underscore) that appear in the namespace, at the time they are
8444 evaluated. The argument count and the type of the returned object are
8445 validated against the ACPI specification. The purpose of this validation
8447 to detect problems with the BIOS-implemented predefined ACPI objects
8449 the results are returned to the ACPI-related drivers. Future enhancements
8451 include actual repair of incorrect return objects where possible. Two new
8452 files are nspredef.c and acpredef.h.
8454 Fixed a fault in the AML parser if a memory allocation fails during the
8456 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
8458 Fixed an issue with implicit return compatibility. This change improves
8460 implicit return mechanism to be more compatible with the MS interpreter.
8462 Ming, ACPICA BZ 349.
8464 Implemented support for zero-length buffer-to-string conversions. Allow
8466 length strings during interpreter buffer-to-string conversions. For
8468 during the ToDecimalString and ToHexString operators, as well as implicit
8469 conversions. Fiodor Suietov, ACPICA BZ 585.
8471 Fixed two possible memory leaks in the error exit paths of
8472 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
8474 similar in that they use a stack of state objects in order to eliminate
8475 recursion. The stack must be fully unwound and deallocated if an error
8476 occurs. Lin Ming. ACPICA BZ 383.
8478 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
8480 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
8481 Moore ACPICA BZ 442.
8483 Removed the obsolete version number in module headers. Removed the
8484 "$Revision" number that appeared in each module header. This version
8486 was useful under SourceSafe and CVS, but has no meaning under git. It is
8488 only incorrect, it could also be misleading.
8490 Example Code and Data Size: These are the sizes for the OS-independent
8491 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8492 debug version of the code includes the debug output trace mechanism and
8494 much larger code and data size.
8497 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8498 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
8500 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
8501 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
8503 ----------------------------------------
8504 29 August 2008. Summary of changes for version 20080829:
8506 1) ACPI CA Core Subsystem:
8508 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
8509 Reference. Changes include the elimination of cheating on the Object
8511 for the DdbHandle subtype, addition of a reference class field to
8512 differentiate the various reference types (instead of an AML opcode), and
8514 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
8516 Reduce an error to a warning for an incorrect method argument count.
8517 Previously aborted with an error if too few arguments were passed to a
8518 control method via the external ACPICA interface. Now issue a warning
8520 and continue. Handles the case where the method inadvertently declares
8522 many arguments, but does not actually use the extra ones. Applies mainly
8524 the predefined methods. Lin Ming. Linux BZ 11032.
8526 Disallow the evaluation of named object types with no intrinsic value.
8528 AE_TYPE for objects that have no value and therefore evaluation is
8530 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
8532 these types were allowed, but an exception would be generated at some
8534 during the evaluation. Now, the error is generated up front.
8536 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
8537 (nsnames.c). Fixes a leak in the error exit path.
8539 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
8541 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
8543 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
8546 Removed obsolete and/or unused exception codes from the acexcep.h header.
8547 There is the possibility that certain device drivers may be affected if
8549 use any of these exceptions.
8551 The ACPICA documentation has been added to the public git source tree,
8553 acpica/documents. Included are the ACPICA programmer reference, the iASL
8554 compiler reference, and the changes.txt release logfile.
8556 Example Code and Data Size: These are the sizes for the OS-independent
8557 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8558 debug version of the code includes the debug output trace mechanism and
8560 much larger code and data size.
8563 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8564 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
8566 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8567 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
8569 2) iASL Compiler/Disassembler and Tools:
8571 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
8572 defines _SCP with 3 arguments. Previous versions defined it with only 1
8573 argument. iASL now allows both definitions.
8575 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
8577 length subtables when disassembling ACPI tables. Also fixed a couple of
8578 errors where a full 16-bit table type field was not extracted from the
8582 acpisrc: Improve comment counting mechanism for generating source code
8583 statistics. Count first and last lines of multi-line comments as
8585 not comment lines. Handle Linux legal header in addition to standard
8589 ----------------------------------------
8591 29 July 2008. Summary of changes for version 20080729:
8593 1) ACPI CA Core Subsystem:
8595 Fix a possible deadlock in the GPE dispatch. Remove call to
8596 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
8598 to acquire the GPE lock but can deadlock since the GPE lock is already
8600 at dispatch time. This code was introduced in version 20060831 as a
8602 to Linux BZ 6881 and has since been removed from Linux.
8604 Add a function to dereference returned reference objects. Examines the
8606 object from a call to AcpiEvaluateObject. Any Index or RefOf references
8608 automatically dereferenced in an attempt to return something useful
8610 reference types cannot be converted into an external ACPI_OBJECT.)
8612 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
8614 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
8615 subtables for the MADT and one new subtable for the SRAT. Includes
8616 disassembler and AcpiSrc support. Data from the Intel 64 Architecture
8618 Specification, June 2008.
8620 Additional error checking for pathname utilities. Add error check after
8622 calls to AcpiNsGetPathnameLength. Add status return from
8623 AcpiNsBuildExternalPath and check after all calls. Add parameter
8625 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
8627 Return status from the global init function AcpiUtGlobalInitialize. This
8629 used by both the kernel subsystem and the utilities such as iASL
8631 The function could possibly fail when the caches are initialized. Yang
8634 Add a function to decode reference object types to strings. Created for
8635 improved error messages.
8637 Improve object conversion error messages. Better error messages during
8639 conversion from internal to the external ACPI_OBJECT. Used for external
8641 to AcpiEvaluateObject.
8643 Example Code and Data Size: These are the sizes for the OS-independent
8644 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8645 debug version of the code includes the debug output trace mechanism and
8647 much larger code and data size.
8650 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
8651 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
8653 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8654 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
8656 2) iASL Compiler/Disassembler and Tools:
8658 Debugger: fix a possible hang when evaluating non-methods. Fixes a
8660 introduced in version 20080701. If the object being evaluated (via
8662 command) is not a method, the debugger can hang while trying to obtain
8664 existent parameters.
8666 iASL: relax error for using reserved "_T_x" identifiers. These names can
8667 appear in a disassembled ASL file if they were emitted by the original
8668 compiler. Instead of issuing an error or warning and forcing the user to
8669 manually change these names, issue a remark instead.
8671 iASL: error if named object created in while loop. Emit an error if any
8673 object is created within a While loop. If allowed, this code will
8676 run-time error on the second iteration of the loop when an attempt is
8679 create the same named object twice. ACPICA bugzilla 730.
8681 iASL: Support absolute pathnames for include files. Add support for
8683 pathnames within the Include operator. previously, only relative
8687 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
8689 The ACPI spec requires one interrupt minimum. BZ 423
8691 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
8692 Handles the case for the Interrupt Resource Descriptor where
8693 the ResourceSource argument is omitted but ResourceSourceIndex
8694 is present. Now leave room for the Index. BZ 426
8696 iASL: Prevent error message if CondRefOf target does not exist. Fixes
8698 where an error message is emitted if the target does not exist. BZ 516
8700 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
8701 (get ACPI tables on Windows). This was apparently broken in version
8704 AcpiXtract: Handle EOF while extracting data. Correctly handle the case
8706 the EOF happens immediately after the last table in the input file. Print
8707 completion message. Previously, no message was displayed in this case.
8709 ----------------------------------------
8710 01 July 2008. Summary of changes for version 20080701:
8712 0) Git source tree / acpica.org
8714 Fixed a problem where a git-clone from http would not transfer the entire
8717 1) ACPI CA Core Subsystem:
8719 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
8720 enable bit. Now performs a read-change-write of the enable register
8722 of simply writing out the cached enable mask. This will prevent
8724 enabling of GPEs if a rogue GPE is received during initialization (before
8726 handlers are installed.)
8728 Implemented a copy for dynamically loaded tables. Previously, dynamically
8729 loaded tables were simply mapped - but on some machines this memory is
8730 corrupted after suspend. Now copy the table to a local buffer. For the
8731 OpRegion case, added checksum verify. Use the table length from the table
8732 header, not the region length. For the Buffer case, use the table length
8733 also. Dennis Noordsij, Bob Moore. BZ 10734
8735 Fixed a problem where the same ACPI table could not be dynamically loaded
8737 unloaded more than once. Without this change, a table cannot be loaded
8739 once it has been loaded/unloaded one time. The current mechanism does not
8740 unregister a table upon an unload. During a load, if the same table is
8742 this no longer returns an exception. BZ 722
8744 Fixed a problem where the wrong descriptor length was calculated for the
8745 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
8747 are calculated as 12 bytes long, but the actual length in the internal
8748 descriptor is 16 because of the round-up to 8 on the 64-bit build.
8750 by Linn Crosetto. BZ 728
8752 Fixed a possible memory leak in the Unload operator. The DdbHandle
8754 by Load() did not have its reference count decremented during unload,
8756 to a memory leak. Lin Ming. BZ 727
8758 Fixed a possible memory leak when deleting thermal/processor objects. Any
8759 associated notify handlers (and objects) were not being deleted. Fiodor
8762 Fixed the ordering of the ASCII names in the global mutex table to match
8764 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
8766 Vegard Nossum. BZ 726
8768 Enhanced the AcpiGetObjectInfo interface to return the number of required
8769 arguments if the object is a control method. Added this call to the
8771 so the proper number of default arguments are passed to a method. This
8772 prevents a warning when executing methods from AcpiExec.
8774 Added a check for an invalid handle in AcpiGetObjectInfo. Return
8775 AE_BAD_PARAMETER if input handle is invalid. BZ 474
8777 Fixed an extraneous warning from exconfig.c on the 64-bit build.
8779 Example Code and Data Size: These are the sizes for the OS-independent
8780 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8781 debug version of the code includes the debug output trace mechanism and
8783 much larger code and data size.
8786 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
8787 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
8789 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
8790 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
8792 2) iASL Compiler/Disassembler and Tools:
8794 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
8795 resource descriptor names.
8797 iASL: Detect invalid ASCII characters in input (windows version). Removed
8799 "-CF" flag from the flex compile, enables correct detection of non-ASCII
8800 characters in the input. BZ 441
8802 iASL: Eliminate warning when result of LoadTable is not used. Eliminate
8804 "result of operation not used" warning when the DDB handle returned from
8805 LoadTable is not used. The warning is not needed. BZ 590
8807 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
8810 pass address of table to the AML. Added option to disable OpRegion
8812 to allow creation of an OpRegion with a real address that was passed to
8814 All of this allows testing of the Load and Unload operators from
8817 Debugger: update tables command for unloaded tables. Handle unloaded
8819 and use the standard table header output routine.
8821 ----------------------------------------
8822 09 June 2008. Summary of changes for version 20080609:
8824 1) ACPI CA Core Subsystem:
8826 Implemented a workaround for reversed _PRT entries. A significant number
8828 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
8829 change dynamically detects and repairs this problem. Provides
8831 with MS ACPI. BZ 6859
8833 Simplified the internal ACPI hardware interfaces to eliminate the locking
8834 flag parameter from Register Read/Write. Added a new external interface,
8835 AcpiGetRegisterUnlocked.
8837 Fixed a problem where the invocation of a GPE control method could hang.
8839 was a regression introduced in 20080514. The new method argument count
8840 validation mechanism can enter an infinite loop when a GPE method is
8841 dispatched. Problem fixed by removing the obsolete code that passed GPE
8843 information to the notify handler via the control method parameter
8846 Fixed a problem where the _SST execution status was incorrectly returned
8848 the caller of AcpiEnterSleepStatePrep. This was a regression introduced
8850 20080514. _SST is optional and a NOT_FOUND exception should never be
8853 Fixed a problem where a deleted object could be accessed from within the
8855 parser. This was a regression introduced in version 20080123 as a fix for
8857 Unload operator. Lin Ming. BZ 10669
8859 Cleaned up the debug operand dump mechanism. Eliminated unnecessary
8861 and eliminated the use of a negative index in a loop. Operands are now
8862 displayed in the correct order, not backwards. This also fixes a
8864 introduced in 20080514 on 64-bit systems where the elimination of
8865 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
8868 Fixed a possible memory leak in EvPciConfigRegionSetup where the error
8870 path did not delete a locally allocated structure.
8872 Updated definitions for the DMAR and SRAT tables to synchronize with the
8873 current specifications. Includes disassembler support.
8875 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
8876 loop termination value was used. Loop terminated on iteration early,
8878 one mutex. Linn Crosetto
8880 Example Code and Data Size: These are the sizes for the OS-independent
8881 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8882 debug version of the code includes the debug output trace mechanism and
8884 much larger code and data size.
8887 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
8888 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
8890 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
8891 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
8893 2) iASL Compiler/Disassembler and Tools:
8895 Disassembler: Implemented support for EisaId() within _CID objects. Now
8896 disassemble integer _CID objects back to EisaId invocations, including
8897 multiple integers within _CID packages. Includes single-step support for
8900 Disassembler: Added support for DMAR and SRAT table definition changes.
8902 ----------------------------------------
8903 14 May 2008. Summary of changes for version 20080514:
8905 1) ACPI CA Core Subsystem:
8907 Fixed a problem where GPEs were enabled too early during the ACPICA
8908 initialization. This could lead to "handler not installed" errors on some
8909 machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
8911 ensures that all operation regions and devices throughout the namespace
8913 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
8915 Implemented a change to the enter sleep code. Moved execution of the _GTS
8916 method to just before setting sleep enable bit. The execution was moved
8918 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
8919 immediately before the SLP_EN bit is set, as per the ACPI specification.
8922 Implemented a fix to disable unknown GPEs (2nd version). Now always
8924 the GPE, even if ACPICA thinks that that it is already disabled. It is
8925 possible that the AML or some other code has enabled the GPE unbeknownst
8929 Fixed a problem with the Field operator where zero-length fields would
8931 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
8933 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
8935 Implemented a fix for the Load operator, now load the table at the
8937 root. This reverts a change introduced in version 20071019. The table is
8939 loaded at the namespace root even though this goes against the ACPI
8940 specification. This provides compatibility with other ACPI
8942 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
8945 Fixed a problem where ACPICA would not Load() tables with unusual
8947 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
8948 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
8949 Therefore, signature validation is worthless. Apparently MS ACPI accepts
8951 signatures, ACPICA must be compatible. BZ 10454.
8953 Fixed a possible negative array index in AcpiUtValidateException. Added
8955 fields to the exception string arrays to eliminate a -1 subtraction on
8959 Updated the debug tracking macros to reduce overall code and data size.
8960 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
8961 instead of pointers to static strings. Jan Beulich and Bob Moore.
8963 Implemented argument count checking in control method invocation via
8964 AcpiEvaluateObject. Now emit an error if too few arguments, warning if
8966 many. This applies only to extern programmatic control method execution,
8968 method-to-method calls within the AML. Lin Ming.
8970 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
8972 longer needed, especially with the removal of 16-bit support. It was
8974 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
8977 32/64-bit platforms is required.
8979 Added the C const qualifier for appropriate string constants -- mostly
8980 MODULE_NAME and printf format strings. Jan Beulich.
8982 Example Code and Data Size: These are the sizes for the OS-independent
8983 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8984 debug version of the code includes the debug output trace mechanism and
8986 much larger code and data size.
8989 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
8990 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
8992 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
8993 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
8995 2) iASL Compiler/Disassembler and Tools:
8997 Implemented ACPI table revision ID validation in the disassembler. Zero
8999 always invalid. For DSDTs, the ID controls the interpreter integer width.
9001 means 32-bit and this is unusual. 2 or greater is 64-bit.
9003 ----------------------------------------
9004 21 March 2008. Summary of changes for version 20080321:
9006 1) ACPI CA Core Subsystem:
9008 Implemented an additional change to the GPE support in order to suppress
9009 spurious or stray GPEs. The AcpiEvDisableGpe function will now
9011 disable incoming GPEs that are neither enabled nor disabled -- meaning
9013 the GPE is unknown to the system. This should prevent future interrupt
9015 from that GPE. BZ 6217 (Zhang Rui)
9017 Fixed a problem where NULL package elements were not returned to the
9018 AcpiEvaluateObject interface correctly. The element was simply ignored
9019 instead of returning a NULL ACPI_OBJECT package element, potentially
9021 a buffer overflow and/or confusing the caller who expected a fixed number
9023 elements. BZ 10132 (Lin Ming, Bob Moore)
9025 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
9027 Qword), Field, BankField, and IndexField operators when invoked from
9029 an executing control method. In this case, these operators created
9031 nodes that were incorrectly left marked as permanent nodes instead of
9032 temporary nodes. This could cause a problem if there is race condition
9033 between an exiting control method and a running namespace walk. (Reported
9037 Fixed a problem where the CreateField and CreateXXXField operators would
9038 incorrectly allow duplicate names (the name of the field) with no
9042 Implemented several changes for Notify handling. Added support for new
9044 values (ACPI 2.0+) and improved the Notify debug output. Notify on
9045 PowerResource objects is no longer allowed, as per the ACPI
9047 (Bob Moore, Zhang Rui)
9049 All Reference Objects returned via the AcpiEvaluateObject interface are
9051 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
9053 NULL objects - either NULL package elements or unresolved named
9056 Fixed a problem where an extraneous debug message was produced for
9058 objects (when debugging enabled). The message "Package List length larger
9059 than NumElements count" is now produced in the correct case, and is now
9061 error message rather than a debug message. Added a debug message for the
9062 opposite case, where NumElements is larger than the Package List (the
9064 will be padded out with NULL elements as per the ACPI spec.)
9066 Implemented several improvements for the output of the ASL "Debug" object
9068 clarify and keep all data for a given object on one output line.
9070 Fixed two size calculation issues with the variable-length Start
9072 resource descriptor.
9074 Example Code and Data Size: These are the sizes for the OS-independent
9075 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9076 debug version of the code includes the debug output trace mechanism and
9078 a much larger code and data size.
9081 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
9082 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
9084 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
9085 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
9087 2) iASL Compiler/Disassembler and Tools:
9089 Fixed a problem with the use of the Switch operator where execution of
9091 containing method by multiple concurrent threads could cause an
9092 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
9093 actual Switch opcode, it must be simulated with local named temporary
9094 variables and if/else pairs. The solution chosen was to mark any method
9096 uses Switch as Serialized, thus preventing multiple thread entries. BZ
9099 ----------------------------------------
9100 13 February 2008. Summary of changes for version 20080213:
9102 1) ACPI CA Core Subsystem:
9104 Implemented another MS compatibility design change for GPE/Notify
9106 GPEs are now cleared/enabled asynchronously to allow all pending notifies
9108 complete first. It is expected that the OSL will queue the enable request
9109 behind all pending notify requests (may require changes to the local host
9111 in AcpiOsExecute). Alexey Starikovskiy.
9113 Fixed a problem where buffer and package objects passed as arguments to a
9114 control method via the external AcpiEvaluateObject interface could cause
9116 AE_AML_INTERNAL exception depending on the order and type of operators
9117 executed by the target control method.
9119 Fixed a problem where resource descriptor size optimization could cause a
9120 problem when a _CRS resource template is passed to a _SRS method. The
9122 resource template must use the same descriptors (with the same size) as
9123 returned from _CRS. This change affects the following resource
9125 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
9128 Fixed a problem where a CopyObject to RegionField, BankField, and
9130 objects did not perform an implicit conversion as it should. These types
9132 retain their initial type permanently as per the ACPI specification.
9134 a CopyObject to all other object types should not perform an implicit
9135 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
9137 Fixed a problem with the AcpiGetDevices interface where the mechanism to
9138 match device CIDs did not examine the entire list of available CIDs, but
9139 instead aborted on the first non-matching CID. Andrew Patterson.
9141 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
9143 inadvertently changed to return a 16-bit value instead of a 32-bit value,
9144 truncating the upper dword of a 64-bit value. This macro is only used to
9145 display debug output, so no incorrect calculations were made. Also,
9146 reimplemented the macro so that a 64-bit shift is not performed by
9147 inefficient compilers.
9149 Added missing va_end statements that should correspond with each va_start
9152 Example Code and Data Size: These are the sizes for the OS-independent
9153 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9154 debug version of the code includes the debug output trace mechanism and
9156 a much larger code and data size.
9159 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
9160 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
9162 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
9163 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
9165 2) iASL Compiler/Disassembler and Tools:
9167 Implemented full disassembler support for the following new ACPI tables:
9168 BERT, EINJ, and ERST. Implemented partial disassembler support for the
9169 complicated HEST table. These tables support the Windows Hardware Error
9170 Architecture (WHEA).
9172 ----------------------------------------
9173 23 January 2008. Summary of changes for version 20080123:
9175 1) ACPI CA Core Subsystem:
9177 Added the 2008 copyright to all module headers and signons. This affects
9178 virtually every file in the ACPICA core subsystem, the iASL compiler, and
9179 the tools/utilities.
9181 Fixed a problem with the SizeOf operator when used with Package and
9183 objects. These objects have deferred execution for some arguments, and
9185 execution is now completed before the SizeOf is executed. This problem
9187 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
9191 Implemented an enhancement to the interpreter "slack mode". In the
9194 an explicit return or an implicitly returned object from the last
9196 opcode, a control method will now implicitly return an integer of value 0
9198 Microsoft compatibility. (Lin Ming) BZ 392
9200 Fixed a problem with the Load operator where an exception was not
9203 the case where the table is already loaded. (Lin Ming) BZ 463
9205 Implemented support for the use of DDBHandles as an Indexed Reference, as
9207 the ACPI spec. (Lin Ming) BZ 486
9209 Implemented support for UserTerm (Method invocation) for the Unload
9211 as per the ACPI spec. (Lin Ming) BZ 580
9213 Fixed a problem with the LoadTable operator where the OemId and
9215 input strings could cause unexpected failures if they were shorter than
9217 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
9219 Implemented support for UserTerm (Method invocation) for the Unload
9221 as per the ACPI spec. (Lin Ming) BZ 580
9223 Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
9225 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
9227 Example Code and Data Size: These are the sizes for the OS-independent
9228 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9229 debug version of the code includes the debug output trace mechanism and
9231 a much larger code and data size.
9234 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
9235 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
9237 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
9238 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
9240 2) iASL Compiler/Disassembler and Tools:
9242 Implemented support in the disassembler for checksum validation on
9244 binary DSDTs and SSDTs. If incorrect, a message is displayed within the
9246 header dump at the start of the disassembly.
9248 Implemented additional debugging information in the namespace listing
9250 created during compilation. In addition to the namespace hierarchy, the
9252 pathname to each namespace object is displayed.
9254 Fixed a problem with the disassembler where invalid ACPI tables could
9256 faults or infinite loops.
9258 Fixed an unexpected parse error when using the optional "parameter types"
9259 list in a control method declaration. (Lin Ming) BZ 397
9261 Fixed a problem where two External declarations with the same name did
9263 cause an error (Lin Ming) BZ 509
9265 Implemented support for full TermArgs (adding Argx, Localx and method
9266 invocation) for the ParameterData parameter to the LoadTable operator.
9270 ----------------------------------------
9271 19 December 2007. Summary of changes for version 20071219:
9273 1) ACPI CA Core Subsystem:
9275 Implemented full support for deferred execution for the TermArg string
9276 arguments for DataTableRegion. This enables forward references and full
9277 operand resolution for the three string arguments. Similar to
9279 deferred argument execution.) Lin Ming. BZ 430
9281 Implemented full argument resolution support for the BankValue argument
9283 BankField. Previously, only constants were supported, now any TermArg may
9285 used. Lin Ming BZ 387, 393
9287 Fixed a problem with AcpiGetDevices where the search of a branch of the
9288 device tree could be terminated prematurely. In accordance with the ACPI
9289 specification, the search down the current branch is terminated if a
9291 is both not present and not functional (instead of just not present.)
9295 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
9297 the underlying AML code changed the GPE enable registers. Now, any
9299 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
9301 instead of simply ignored. Rui Zhang.
9303 Fixed a problem with Index Fields where the Index register was
9305 limited to a maximum of 32 bits. Now any size may be used.
9307 Fixed a couple memory leaks associated with "implicit return" objects
9309 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
9311 Example Code and Data Size: These are the sizes for the OS-independent
9312 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9313 debug version of the code includes the debug output trace mechanism and
9315 a much larger code and data size.
9318 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
9319 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
9321 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
9322 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
9324 ----------------------------------------
9325 14 November 2007. Summary of changes for version 20071114:
9327 1) ACPI CA Core Subsystem:
9329 Implemented event counters for each of the Fixed Events, the ACPI SCI
9330 (interrupt) itself, and control methods executed. Named
9331 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
9333 should be useful for debugging and statistics.
9335 Implemented a new external interface, AcpiGetStatistics, to retrieve the
9336 contents of the various event counters. Returns the current values for
9337 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
9338 AcpiMethodCount. The interface can be expanded in the future if new
9340 are added. Device drivers should use this interface rather than access
9344 Fixed a problem with the FromBCD and ToBCD operators. With some
9346 the ShortDivide function worked incorrectly, causing problems with the
9348 functions with large input values. A truncation from 64-bit to 32-bit
9349 inadvertently occurred. Internal BZ 435. Lin Ming
9351 Fixed a problem with Index references passed as method arguments.
9353 passed as arguments to control methods were dereferenced immediately
9355 control was passed to the called method). The references are now
9357 passed directly to the called method. BZ 5389. Lin Ming
9359 Fixed a problem with CopyObject used in conjunction with the Index
9361 The reference was incorrectly dereferenced before the copy. The reference
9363 now correctly copied. BZ 5391. Lin Ming
9365 Fixed a problem with Control Method references within Package objects.
9367 references are now correctly generated. This completes the package
9368 construction overhaul that began in version 20071019.
9370 Example Code and Data Size: These are the sizes for the OS-independent
9371 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9372 debug version of the code includes the debug output trace mechanism and
9374 a much larger code and data size.
9377 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
9378 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
9380 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
9381 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
9384 2) iASL Compiler/Disassembler and Tools:
9386 The AcpiExec utility now installs handlers for all of the predefined
9387 Operation Region types. New types supported are: PCI_Config, CMOS, and
9390 Fixed a problem with the 64-bit version of AcpiExec where the extended
9392 bit) address fields for the DSDT and FACS within the FADT were not being
9393 used, causing truncation of the upper 32-bits of these addresses. Lin
9397 ----------------------------------------
9398 19 October 2007. Summary of changes for version 20071019:
9400 1) ACPI CA Core Subsystem:
9402 Fixed a problem with the Alias operator when the target of the alias is a
9403 named ASL operator that opens a new scope -- Scope, Device,
9405 Processor, and ThermalZone. In these cases, any children of the original
9406 operator could not be accessed via the alias, potentially causing
9408 AE_NOT_FOUND exceptions. (BZ 9067)
9410 Fixed a problem with the Package operator where all named references were
9411 created as object references and left otherwise unresolved. According to
9413 ACPI specification, a Package can only contain Data Objects or references
9415 control methods. The implication is that named references to Data Objects
9416 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
9417 immediately upon package creation. This is the approach taken with this
9418 change. References to all other named objects (Methods, Devices, Scopes,
9419 etc.) are all now properly created as reference objects. (BZ 5328)
9421 Reverted a change to Notify handling that was introduced in version
9422 20070508. This version changed the Notify handling from asynchronous to
9423 fully synchronous (Device driver Notify handling with respect to the
9425 ASL operator). It was found that this change caused more problems than it
9426 solved and was removed by most users.
9428 Fixed a problem with the Increment and Decrement operators where the type
9430 the target object could be unexpectedly and incorrectly changed. (BZ 353)
9433 Fixed a problem with the Load and LoadTable operators where the table
9434 location within the namespace was ignored. Instead, the table was always
9435 loaded into the root or current scope. Lin Ming.
9437 Fixed a problem with the Load operator when loading a table from a buffer
9438 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
9440 Fixed a problem with the Debug object where a store of a DdbHandle
9442 object to the Debug object could cause a fault.
9444 Added a table checksum verification for the Load operator, in the case
9446 the load is from a buffer. (BZ 578).
9448 Implemented additional parameter validation for the LoadTable operator.
9450 length of the input strings SignatureString, OemIdString, and OemTableId
9452 now checked for maximum lengths. (BZ 582) Lin Ming.
9454 Example Code and Data Size: These are the sizes for the OS-independent
9455 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9456 debug version of the code includes the debug output trace mechanism and
9458 a much larger code and data size.
9461 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
9462 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
9464 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
9465 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
9468 2) iASL Compiler/Disassembler:
9470 Fixed a problem where if a single file was specified and the file did not
9471 exist, no error message was emitted. (Introduced with wildcard support in
9474 ----------------------------------------
9475 19 September 2007. Summary of changes for version 20070919:
9477 1) ACPI CA Core Subsystem:
9479 Designed and implemented new external interfaces to install and remove
9480 handlers for ACPI table-related events. Current events that are defined
9482 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
9483 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
9484 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
9486 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
9487 (acpi_serialized option on Linux) could cause some systems to hang during
9488 initialization. (Bob Moore) BZ 8171
9490 Fixed a problem where objects of certain types (Device, ThermalZone,
9491 Processor, PowerResource) can be not found if they are declared and
9492 referenced from within the same control method (Lin Ming) BZ 341
9494 Example Code and Data Size: These are the sizes for the OS-independent
9495 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9496 debug version of the code includes the debug output trace mechanism and
9498 a much larger code and data size.
9501 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
9502 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
9504 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
9505 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
9508 2) iASL Compiler/Disassembler:
9510 Implemented support to allow multiple files to be compiled/disassembled
9513 single invocation. This includes command line wildcard support for both
9515 Windows and Unix versions of the compiler. This feature simplifies the
9516 disassembly and compilation of multiple ACPI tables in a single
9519 ----------------------------------------
9520 08 May 2007. Summary of changes for version 20070508:
9522 1) ACPI CA Core Subsystem:
9524 Implemented a Microsoft compatibility design change for the handling of
9526 Notify AML operator. Previously, notify handlers were dispatched and
9527 executed completely asynchronously in a deferred thread. The new design
9528 still executes the notify handlers in a different thread, but the
9530 thread that executed the Notify() now waits at a synchronization point
9532 the notify handler to complete. Some machines depend on a synchronous
9534 operator in order to operate correctly.
9536 Implemented support to allow Package objects to be passed as method
9537 arguments to the external AcpiEvaluateObject interface. Previously, this
9538 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
9539 implemented since there were no reserved control methods that required it
9542 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
9544 contained invalid non-zero values in reserved fields could cause later
9545 failures because these fields have meaning in later revisions of the
9547 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
9549 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
9551 Fixed a problem where the Global Lock handle was not properly updated if
9553 thread that acquired the Global Lock via executing AML code then
9555 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
9559 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
9560 could be corrupted if the interrupt being removed was at the head of the
9561 list. Reported by Linn Crosetto.
9563 Example Code and Data Size: These are the sizes for the OS-independent
9564 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9565 debug version of the code includes the debug output trace mechanism and
9567 a much larger code and data size.
9570 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9571 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
9573 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
9574 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
9576 ----------------------------------------
9577 20 March 2007. Summary of changes for version 20070320:
9579 1) ACPI CA Core Subsystem:
9581 Implemented a change to the order of interpretation and evaluation of AML
9582 operand objects within the AML interpreter. The interpreter now evaluates
9583 operands in the order that they appear in the AML stream (and the
9584 corresponding ASL code), instead of in the reverse order (after the
9586 operand list has been parsed). The previous behavior caused several
9588 incompatibilities with the Microsoft AML interpreter as well as being
9589 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
9591 Implemented a change to the ACPI Global Lock support. All interfaces to
9593 global lock now allow the same thread to acquire the lock multiple times.
9594 This affects the AcpiAcquireGlobalLock external interface to the global
9596 as well as the internal use of the global lock to support AML fields -- a
9597 control method that is holding the global lock can now simultaneously
9599 AML fields that require global lock protection. Previously, in both
9601 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
9603 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
9604 Controller. There is no change to the behavior of the AML Acquire
9606 as this can already be used to acquire a mutex multiple times by the same
9607 thread. BZ 8066. With assistance from Alexey Starikovskiy.
9609 Fixed a problem where invalid objects could be referenced in the AML
9610 Interpreter after error conditions. During operand evaluation, ensure
9612 the internal "Return Object" field is cleared on error and only valid
9613 pointers are stored there. Caused occasional access to deleted objects
9615 resulted in "large reference count" warning messages. Valery Podrezov.
9617 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
9619 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
9622 Fixed an internal problem with the handling of result objects on the
9623 interpreter result stack. BZ 7872. Valery Podrezov.
9625 Removed obsolete code that handled the case where AML_NAME_OP is the
9627 of a reference (Reference.Opcode). This code was no longer necessary. BZ
9628 7874. Valery Podrezov.
9630 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
9633 remnant from the previously discontinued 16-bit support.
9635 Example Code and Data Size: These are the sizes for the OS-independent
9636 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9637 debug version of the code includes the debug output trace mechanism and
9639 a much larger code and data size.
9642 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9643 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9645 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9646 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
9648 ----------------------------------------
9649 26 January 2007. Summary of changes for version 20070126:
9651 1) ACPI CA Core Subsystem:
9653 Added the 2007 copyright to all module headers and signons. This affects
9654 virtually every file in the ACPICA core subsystem, the iASL compiler, and
9657 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
9658 during a table load. A bad pointer was passed in the case where the DSDT
9660 overridden, causing a fault in this case.
9662 Example Code and Data Size: These are the sizes for the OS-independent
9663 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9664 debug version of the code includes the debug output trace mechanism and
9666 a much larger code and data size.
9669 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9670 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9672 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9673 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9675 ----------------------------------------
9676 15 December 2006. Summary of changes for version 20061215:
9678 1) ACPI CA Core Subsystem:
9680 Support for 16-bit ACPICA has been completely removed since it is no
9682 necessary and it clutters the code. All 16-bit macros, types, and
9683 conditional compiles have been removed, cleaning up and simplifying the
9685 across the entire subsystem. DOS support is no longer needed since the
9686 bootable Linux firmware kit is now available.
9688 The handler for the Global Lock is now removed during AcpiTerminate to
9689 enable a clean subsystem restart, via the implementation of the
9690 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
9693 Implemented enhancements to the multithreading support within the
9695 to enable improved multithreading debugging and evaluation of the
9699 Debugger: Enhanced the Statistics/Memory command to emit the total
9701 memory used during the execution, as well as the maximum memory consumed
9703 each of the various object types. (Valery Podrezov)
9705 Example Code and Data Size: These are the sizes for the OS-independent
9706 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9707 debug version of the code includes the debug output trace mechanism and
9709 a much larger code and data size.
9712 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
9713 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
9715 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9716 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9719 2) iASL Compiler/Disassembler and Tools:
9721 AcpiExec: Implemented a new option (-m) to display full memory use
9722 statistics upon subsystem/program termination. (Valery Podrezov)
9724 ----------------------------------------
9725 09 November 2006. Summary of changes for version 20061109:
9727 1) ACPI CA Core Subsystem:
9729 Optimized the Load ASL operator in the case where the source operand is
9731 operation region. Simply map the operation region memory, instead of
9732 performing a bytewise read. (Region must be of type SystemMemory, see
9735 Fixed the Load ASL operator for the case where the source operand is a
9736 region field. A buffer object is also allowed as the source operand. BZ
9739 Fixed a problem where the Load ASL operator allowed the source operand to
9741 an operation region of any type. It is now restricted to regions of type
9742 SystemMemory, as per the ACPI specification. BZ 481
9744 Additional cleanup and optimizations for the new Table Manager code.
9746 AcpiEnable will now fail if all of the required ACPI tables are not
9748 (FADT, FACS, DSDT). BZ 477
9750 Added #pragma pack(8/4) to acobject.h to ensure that the structures in
9752 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
9753 manually optimized to be aligned and will not work if it is byte-packed.
9755 Example Code and Data Size: These are the sizes for the OS-independent
9756 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9757 debug version of the code includes the debug output trace mechanism and
9759 a much larger code and data size.
9762 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
9763 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
9765 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
9766 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
9769 2) iASL Compiler/Disassembler and Tools:
9771 Fixed a problem where the presence of the _OSI predefined control method
9772 within complex expressions could cause an internal compiler error.
9774 AcpiExec: Implemented full region support for multiple address spaces.
9775 SpaceId is now part of the REGION object. BZ 429
9777 ----------------------------------------
9778 11 October 2006. Summary of changes for version 20061011:
9780 1) ACPI CA Core Subsystem:
9782 Completed an AML interpreter performance enhancement for control method
9783 execution. Previously a 2-pass parse/execution, control methods are now
9784 completely parsed and executed in a single pass. This improves overall
9785 interpreter performance by ~25%, reduces code size, and reduces CPU stack
9786 use. (Valery Podrezov + interpreter changes in version 20051202 that
9787 eliminated namespace loading during the pass one parse.)
9789 Implemented _CID support for PCI Root Bridge detection. If the _HID does
9791 match the predefined PCI Root Bridge IDs, the _CID list (if present) is
9793 obtained and also checked for an ID match.
9795 Implemented additional support for the PCI _ADR execution: upsearch until
9797 device scope is found before executing _ADR. This allows PCI_Config
9798 operation regions to be declared locally within control methods
9802 Fixed a problem with a possible race condition between threads executing
9803 AcpiWalkNamespace and the AML interpreter. This condition was removed by
9804 modifying AcpiWalkNamespace to (by default) ignore all temporary
9806 entries created during any concurrent control method execution. An
9807 additional namespace race condition is known to exist between
9808 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
9811 Restructured the AML ParseLoop function, breaking it into several
9812 subfunctions in order to reduce CPU stack use and improve
9816 AcpiGetHandle: Fix for parameter validation to detect invalid
9818 of prefix handle and pathname. BZ 478
9820 Example Code and Data Size: These are the sizes for the OS-independent
9821 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9822 debug version of the code includes the debug output trace mechanism and
9824 a much larger code and data size.
9827 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
9828 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
9830 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
9831 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
9833 2) iASL Compiler/Disassembler and Tools:
9835 Ported the -g option (get local ACPI tables) to the new ACPICA Table
9837 to restore original behavior.
9839 ----------------------------------------
9840 27 September 2006. Summary of changes for version 20060927:
9842 1) ACPI CA Core Subsystem:
9844 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
9845 These functions now use a spinlock for mutual exclusion and the interrupt
9846 level indication flag is not needed.
9848 Fixed a problem with the Global Lock where the lock could appear to be
9849 obtained before it is actually obtained. The global lock semaphore was
9850 inadvertently created with one unit instead of zero units. (BZ 464)
9854 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
9856 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
9858 Example Code and Data Size: These are the sizes for the OS-independent
9859 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9860 debug version of the code includes the debug output trace mechanism and
9862 a much larger code and data size.
9865 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
9866 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
9868 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
9869 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
9872 2) iASL Compiler/Disassembler and Tools:
9874 Fixed a compilation problem with the pre-defined Resource Descriptor
9876 names where an "object does not exist" error could be incorrectly
9878 if the parent ResourceTemplate pathname places the template within a
9879 different namespace scope than the current scope. (BZ 7212)
9881 Fixed a problem where the compiler could hang after syntax errors
9883 in an ElseIf construct. (BZ 453)
9885 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
9886 operator. An incorrect output filename was produced when this parameter
9888 a null string (""). Now, the original input filename is used as the AML
9889 output filename, with an ".aml" extension.
9891 Implemented a generic batch command mode for the AcpiExec utility
9893 any AML debugger command) (Valery Podrezov).
9895 ----------------------------------------
9896 12 September 2006. Summary of changes for version 20060912:
9898 1) ACPI CA Core Subsystem:
9900 Enhanced the implementation of the "serialized mode" of the interpreter
9901 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
9902 specified, instead of creating a serialization semaphore per control
9904 the interpreter lock is simply no longer released before a blocking
9905 operation during control method execution. This effectively makes the AML
9906 Interpreter single-threaded. The overhead of a semaphore per-method is
9909 Fixed a regression where an error was no longer emitted if a control
9911 attempts to create 2 objects of the same name. This once again returns
9912 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
9914 will dynamically serialize the control method to possible prevent future
9917 Integrated a fix for a problem with PCI Express HID detection in the PCI
9918 Config Space setup procedure. (BZ 7145)
9920 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
9921 AcpiHwInitialize function - the FADT registers are now validated when the
9924 Added two new warnings during FADT verification - 1) if the FADT is
9926 than the largest known FADT version, and 2) if there is a mismatch
9929 32-bit block address and the 64-bit X counterpart (when both are non-
9932 Example Code and Data Size: These are the sizes for the OS-independent
9933 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9934 debug version of the code includes the debug output trace mechanism and
9936 a much larger code and data size.
9939 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
9940 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
9942 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
9943 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
9946 2) iASL Compiler/Disassembler and Tools:
9948 Fixed a problem with the implementation of the Switch() operator where
9950 temporary variable was declared too close to the actual Switch, instead
9952 at method level. This could cause a problem if the Switch() operator is
9953 within a while loop, causing an error on the second iteration. (BZ 460)
9955 Disassembler - fix for error emitted for unknown type for target of scope
9956 operator. Now, ignore it and continue.
9958 Disassembly of an FADT now verifies the input FADT and reports any errors
9959 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
9961 Disassembly of raw data buffers with byte initialization data now
9963 each output line with the current buffer offset.
9965 Disassembly of ASF! table now includes all variable-length data fields at
9966 the end of some of the subtables.
9968 The disassembler now emits a comment if a buffer appears to be a
9969 ResourceTemplate, but cannot be disassembled as such because the EndTag
9971 not appear at the very end of the buffer.
9973 AcpiExec - Added the "-t" command line option to enable the serialized
9975 of the AML interpreter.
9977 ----------------------------------------
9978 31 August 2006. Summary of changes for version 20060831:
9980 1) ACPI CA Core Subsystem:
9982 Miscellaneous fixes for the Table Manager:
9983 - Correctly initialize internal common FADT for all 64-bit "X" fields
9984 - Fixed a couple table mapping issues during table load
9985 - Fixed a couple alignment issues for IA64
9986 - Initialize input array to zero in AcpiInitializeTables
9987 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
9990 Change for GPE support: when a "wake" GPE is received, all wake GPEs are
9992 immediately disabled to prevent the waking GPE from firing again and to
9993 prevent other wake GPEs from interrupting the wake process.
9995 Added the AcpiGpeCount global that tracks the number of processed GPEs,
9997 be used for debugging systems with a large number of ACPI interrupts.
9999 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
10000 both the ACPICA headers and the disassembler.
10002 Example Code and Data Size: These are the sizes for the OS-independent
10003 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10004 debug version of the code includes the debug output trace mechanism and
10006 a much larger code and data size.
10009 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
10010 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
10012 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
10013 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
10016 2) iASL Compiler/Disassembler and Tools:
10018 Disassembler support for the DMAR ACPI table.
10020 ----------------------------------------
10021 23 August 2006. Summary of changes for version 20060823:
10023 1) ACPI CA Core Subsystem:
10025 The Table Manager component has been completely redesigned and
10026 reimplemented. The new design is much simpler, and reduces the overall
10028 and data size of the kernel-resident ACPICA by approximately 5%. Also, it
10030 now possible to obtain the ACPI tables very early during kernel
10031 initialization, even before dynamic memory management is initialized.
10032 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
10034 Obsolete ACPICA interfaces:
10036 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
10039 - AcpiLoadTable: Not needed.
10040 - AcpiUnloadTable: Not needed.
10042 New ACPICA interfaces:
10044 - AcpiInitializeTables: Must be called before the table manager can be
10046 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
10047 allocated memory after it becomes available.
10048 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
10052 Other ACPICA changes:
10054 - AcpiGetTableHeader returns the actual mapped table header, not a copy.
10056 AcpiOsUnmapMemory to free this mapping.
10057 - AcpiGetTable returns the actual mapped table. The mapping is managed
10058 internally and must not be deleted by the caller. Use of this interface
10059 causes no additional dynamic memory allocation.
10060 - AcpiFindRootPointer: Support for physical addressing has been
10062 it appeared to be unused.
10063 - The interface to AcpiOsMapMemory has changed to be consistent with the
10064 other allocation interfaces.
10065 - The interface to AcpiOsGetRootPointer has changed to eliminate
10068 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
10070 bit platforms. Was previously 64 bits on all platforms.
10071 - The interface to the ACPI Global Lock acquire/release macros have
10073 slightly since ACPICA no longer keeps a local copy of the FACS with a
10074 constructed pointer to the actual global lock.
10076 Porting to the new table manager:
10078 - AcpiInitializeTables: Must be called once, and can be called anytime
10079 during the OS initialization process. It allows the host to specify an
10081 of memory to be used to store the internal version of the RSDT/XSDT (root
10082 table). This allows the host to access ACPI tables before memory
10084 is initialized and running.
10085 - AcpiReallocateRootTable: Can be called after memory management is
10087 to copy the root table to a dynamically allocated array, freeing up the
10088 scratch memory specified in the call to AcpiInitializeTables.
10089 - AcpiSubsystemInitialize: This existing interface is independent of the
10090 Table Manager, and does not have to be called before the Table Manager
10092 be used, it only must be called before the rest of ACPICA can be used.
10093 - ACPI Tables: Some changes have been made to the names and structure of
10095 actbl.h and actbl1.h header files and may require changes to existing
10097 For example, bitfields have been completely removed because of their lack
10099 portability across C compilers.
10100 - Update interfaces to the Global Lock acquire/release macros if local
10101 versions are used. (see acwin.h)
10103 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
10105 New files: tbfind.c
10107 Example Code and Data Size: These are the sizes for the OS-independent
10108 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10109 debug version of the code includes the debug output trace mechanism and
10111 a much larger code and data size.
10114 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10115 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10117 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
10118 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
10121 2) iASL Compiler/Disassembler and Tools:
10123 No changes for this release.
10125 ----------------------------------------
10126 21 July 2006. Summary of changes for version 20060721:
10128 1) ACPI CA Core Subsystem:
10130 The full source code for the ASL test suite used to validate the iASL
10131 compiler and the ACPICA core subsystem is being released with the ACPICA
10132 source for the first time. The source is contained in a separate package
10134 consists of over 1100 files that exercise all ASL/AML operators. The
10136 should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
10140 Completed a new design and implementation for support of the ACPI Global
10141 Lock. On the OS side, the global lock is now treated as a standard AML
10142 mutex. Previously, multiple OS threads could "acquire" the global lock
10143 simultaneously. However, this could cause the BIOS to be starved out of
10145 lock - especially in cases such as the Embedded Controller driver where
10146 there is a tight coupling between the OS and the BIOS.
10148 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
10149 The Global Lock interrupt handler no longer queues the execution of a
10150 separate thread to signal the global lock semaphore. Instead, the
10152 is signaled directly from the interrupt handler.
10154 Implemented support within the AML interpreter for package objects that
10155 contain a larger AML length (package list length) than the package
10157 count. In this case, the length of the package is truncated to match the
10158 package element count. Some BIOS code apparently modifies the package
10160 on the fly, and this change supports this behavior. Provides
10162 with the MS AML interpreter. (With assistance from Fiodor Suietov)
10164 Implemented a temporary fix for the BankValue parameter of a Bank Field
10166 support all constant values, now including the Zero and One opcodes.
10167 Evaluation of this parameter must eventually be converted to a full
10169 evaluation. A not-implemented error is now returned (temporarily) for
10171 constant values for this parameter.
10173 Fixed problem reports (Fiodor Suietov) integrated:
10174 - Fix for premature object deletion after CopyObject on Operation Region
10178 Example Code and Data Size: These are the sizes for the OS-independent
10179 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10180 debug version of the code includes the debug output trace mechanism and
10182 a much larger code and data size.
10185 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
10186 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
10188 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10189 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10192 2) iASL Compiler/Disassembler and Tools:
10194 No changes for this release.
10196 ----------------------------------------
10197 07 July 2006. Summary of changes for version 20060707:
10199 1) ACPI CA Core Subsystem:
10201 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
10202 that do not allow the initialization of address pointers within packed
10203 structures - even though the hardware itself may support misaligned
10204 transfers. Some of the debug data structures are packed by default to
10207 Added an error message for the case where AcpiOsGetThreadId() returns
10209 A non-zero value is required by the core ACPICA code to ensure the proper
10210 operation of AML mutexes and recursive control methods.
10212 The DSDT is now the only ACPI table that determines whether the AML
10213 interpreter is in 32-bit or 64-bit mode. Not really a functional change,
10215 the hooks for per-table 32/64 switching have been removed from the code.
10217 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
10219 Fixed a possible leak of an OwnerID in the error path of
10220 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
10221 deletion to a single place in AcpiTbUninstallTable to correct possible
10223 when using the AcpiTbDeleteTablesByType interface (with assistance from
10226 Fixed a problem with Serialized control methods where the semaphore
10227 associated with the method could be over-signaled after multiple method
10230 Fixed two issues with the locking of the internal namespace data
10232 Both the Unload() operator and AcpiUnloadTable interface now lock the
10233 namespace during the namespace deletion associated with the table unload
10234 (with assistance from Linn Crosetto.)
10236 Fixed problem reports (Valery Podrezov) integrated:
10237 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
10239 Fixed problem reports (Fiodor Suietov) integrated:
10240 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
10241 - On Address Space handler deletion, needless deactivation call (BZ 374)
10242 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
10244 - Possible memory leak, Notify sub-objects of Processor, Power,
10247 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
10248 - Minimum Length of RSDT should be validated (BZ 379)
10249 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
10251 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
10255 Example Code and Data Size: These are the sizes for the OS-independent
10256 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10257 debug version of the code includes the debug output trace mechanism and
10259 a much larger code and data size.
10262 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
10263 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
10265 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10266 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10269 2) iASL Compiler/Disassembler and Tools:
10271 Fixed problem reports:
10272 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
10275 ----------------------------------------
10276 23 June 2006. Summary of changes for version 20060623:
10278 1) ACPI CA Core Subsystem:
10280 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
10281 allows the type to be customized to the host OS for improved efficiency
10282 (since a spinlock is usually a very small object.)
10284 Implemented support for "ignored" bits in the ACPI registers. According
10286 the ACPI specification, these bits should be preserved when writing the
10287 registers via a read/modify/write cycle. There are 3 bits preserved in
10289 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
10291 Implemented the initial deployment of new OSL mutex interfaces. Since
10293 host operating systems have separate mutex and semaphore objects, this
10294 feature was requested. The base code now uses mutexes (and the new mutex
10295 interfaces) wherever a binary semaphore was used previously. However, for
10296 the current release, the mutex interfaces are defined as macros to map
10298 to the existing semaphore interfaces. Therefore, no OSL changes are
10300 at this time. (See acpiosxf.h)
10302 Fixed several problems with the support for the control method SyncLevel
10303 parameter. The SyncLevel now works according to the ACPI specification
10305 in concert with the Mutex SyncLevel parameter, since the current
10307 is a property of the executing thread. Mutual exclusion for control
10309 is now implemented with a mutex instead of a semaphore.
10311 Fixed three instances of the use of the C shift operator in the bitfield
10312 support code (exfldio.c) to avoid the use of a shift value larger than
10314 target data width. The behavior of C compilers is undefined in this case
10316 can cause unpredictable results, and therefore the case must be detected
10318 avoided. (Fiodor Suietov)
10320 Added an info message whenever an SSDT or OEM table is loaded dynamically
10321 via the Load() or LoadTable() ASL operators. This should improve
10323 capability since it will show exactly what tables have been loaded
10325 the tables present in the RSDT/XSDT.)
10327 Example Code and Data Size: These are the sizes for the OS-independent
10328 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10329 debug version of the code includes the debug output trace mechanism and
10331 a much larger code and data size.
10334 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
10335 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
10337 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
10338 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
10341 2) iASL Compiler/Disassembler and Tools:
10343 No changes for this release.
10345 ----------------------------------------
10346 08 June 2006. Summary of changes for version 20060608:
10348 1) ACPI CA Core Subsystem:
10350 Converted the locking mutex used for the ACPI hardware to a spinlock.
10352 change should eliminate all problems caused by attempting to acquire a
10353 semaphore at interrupt level, and it means that all ACPICA external
10354 interfaces that directly access the ACPI hardware can be safely called
10356 interrupt level. OSL code that implements the semaphore interfaces should
10358 able to eliminate any workarounds for being called at interrupt level.
10360 Fixed a regression introduced in 20060526 where the ACPI device
10361 initialization could be prematurely aborted with an AE_NOT_FOUND if a
10363 did not have an optional _INI method.
10365 Fixed an IndexField issue where a write to the Data Register should be
10366 limited in size to the AccessSize (width) of the IndexField itself. (BZ
10370 Fixed problem reports (Valery Podrezov) integrated:
10371 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
10373 Fixed problem reports (Fiodor Suietov) integrated:
10374 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
10376 Removed four global mutexes that were obsolete and were no longer being
10379 Example Code and Data Size: These are the sizes for the OS-independent
10380 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10381 debug version of the code includes the debug output trace mechanism and
10383 a much larger code and data size.
10386 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
10387 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
10389 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
10390 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
10393 2) iASL Compiler/Disassembler and Tools:
10395 Fixed a fault when using -g option (get tables from registry) on Windows
10398 Fixed problem reports integrated:
10399 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
10400 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
10402 - Global table revision override (-r) is ignored (BZ 413)
10404 ----------------------------------------
10405 26 May 2006. Summary of changes for version 20060526:
10407 1) ACPI CA Core Subsystem:
10409 Restructured, flattened, and simplified the internal interfaces for
10410 namespace object evaluation - resulting in smaller code, less CPU stack
10412 and fewer interfaces. (With assistance from Mikhail Kouzmich)
10414 Fixed a problem with the CopyObject operator where the first parameter
10416 not typed correctly for the parser, interpreter, compiler, and
10418 Caused various errors and unexpected behavior.
10420 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
10421 produced incorrect results with some C compilers. Since the behavior of C
10422 compilers when the shift value is larger than the datatype width is
10423 apparently not well defined, the interpreter now detects this condition
10425 simply returns zero as expected in all such cases. (BZ 395)
10427 Fixed problem reports (Valery Podrezov) integrated:
10428 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
10429 - Allow interpreter to handle nested method declarations (BZ 5361)
10431 Fixed problem reports (Fiodor Suietov) integrated:
10432 - AcpiTerminate doesn't free debug memory allocation list objects (BZ
10434 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
10436 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
10437 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
10438 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
10439 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
10440 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
10441 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
10442 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
10444 - Status of the Global Initialization Handler call not used (BZ 366)
10445 - Incorrect object parameter to Global Initialization Handler (BZ 367)
10447 Example Code and Data Size: These are the sizes for the OS-independent
10448 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10449 debug version of the code includes the debug output trace mechanism and
10451 a much larger code and data size.
10454 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
10455 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
10457 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
10458 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
10461 2) iASL Compiler/Disassembler and Tools:
10463 Modified the parser to allow the names IO, DMA, and IRQ to be used as
10464 namespace identifiers with no collision with existing resource descriptor
10465 macro names. This provides compatibility with other ASL compilers and is
10466 most useful for disassembly/recompilation of existing tables without
10468 errors. (With assistance from Thomas Renninger)
10470 Disassembler: fixed an incorrect disassembly problem with the
10471 DataTableRegion and CopyObject operators. Fixed a possible fault during
10472 disassembly of some Alias operators.
10474 ----------------------------------------
10475 12 May 2006. Summary of changes for version 20060512:
10477 1) ACPI CA Core Subsystem:
10479 Replaced the AcpiOsQueueForExecution interface with a new interface named
10480 AcpiOsExecute. The major difference is that the new interface does not
10482 a Priority parameter, this appeared to be useless and has been replaced
10485 Type parameter. The Type tells the host what type of execution is being
10486 requested, such as global lock handler, notify handler, GPE handler, etc.
10487 This allows the host to queue and execute the request as appropriate for
10489 request type, possibly using different work queues and different
10491 for the various request types. This enables fixes for multithreading
10492 deadlock problems such as BZ #5534, and will require changes to all
10494 OS interface layers. (Alexey Starikovskiy and Bob Moore)
10496 Fixed a possible memory leak associated with the support for the so-
10498 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
10501 Fixed a problem with the Load() operator where a table load from an
10502 operation region could overwrite an internal table buffer by up to 7
10504 and cause alignment faults on IPF systems. (With assistance from Luming
10507 Example Code and Data Size: These are the sizes for the OS-independent
10508 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10509 debug version of the code includes the debug output trace mechanism and
10511 a much larger code and data size.
10514 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
10515 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
10517 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
10518 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
10522 2) iASL Compiler/Disassembler and Tools:
10524 Disassembler: Implemented support to cross reference the internal
10526 and automatically generate ASL External() statements for symbols not
10528 within the current table being disassembled. This will simplify the
10529 disassembly and recompilation of interdependent tables such as SSDTs
10531 these statements will no longer have to be added manually.
10533 Disassembler: Implemented experimental support to automatically detect
10534 invocations of external control methods and generate appropriate
10536 statements. This is problematic because the AML cannot be correctly
10538 until the number of arguments for each control method is known.
10540 standalone method invocations and invocations as the source operand of a
10541 Store() statement are supported.
10543 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
10544 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
10545 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
10546 more readable and likely closer to the original ASL source.
10548 ----------------------------------------
10549 21 April 2006. Summary of changes for version 20060421:
10551 1) ACPI CA Core Subsystem:
10553 Removed a device initialization optimization introduced in 20051216 where
10554 the _STA method was not run unless an _INI was also present for the same
10555 device. This optimization could cause problems because it could allow
10557 methods to be run within a not-present device subtree. (If a not-present
10558 device had no _INI, _STA would not be run, the not-present status would
10560 be discovered, and the children of the device would be incorrectly
10563 Implemented a new _STA optimization where namespace subtrees that do not
10564 contain _INI are identified and ignored during device initialization.
10565 Selectively running _STA can significantly improve boot time on large
10566 machines (with assistance from Len Brown.)
10568 Implemented support for the device initialization case where the returned
10569 _STA flags indicate a device not-present but functioning. In this case,
10571 is not run, but the device children are examined for presence, as per the
10572 ACPI specification.
10574 Implemented an additional change to the IndexField support in order to
10575 conform to MS behavior. The value written to the Index Register is not
10576 simply a byte offset, it is a byte offset in units of the access width of
10577 the parent Index Field. (Fiodor Suietov)
10579 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
10580 interface is called during the creation of all AML operation regions, and
10581 allows the host OS to exert control over what addresses it will allow the
10582 AML code to access. Operation Regions whose addresses are disallowed will
10583 cause a runtime exception when they are actually accessed (will not
10585 or abort table loading.) See oswinxf or osunixxf for an example
10588 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
10589 interface allows the host OS to match the various "optional"
10590 interface/behavior strings for the _OSI predefined control method as
10591 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
10592 for an example implementation.
10594 Restructured and corrected various problems in the exception handling
10596 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
10597 (with assistance from Takayoshi Kochi.)
10599 Modified the Linux source converter to ignore quoted string literals
10601 converting identifiers from mixed to lower case. This will correct
10603 with the disassembler and other areas where such strings must not be
10606 The ACPI_FUNCTION_* macros no longer require quotes around the function
10607 name. This allows the Linux source converter to convert the names, now
10609 the converter ignores quoted strings.
10611 Example Code and Data Size: These are the sizes for the OS-independent
10612 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10613 debug version of the code includes the debug output trace mechanism and
10615 a much larger code and data size.
10619 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
10620 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
10622 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
10623 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
10626 2) iASL Compiler/Disassembler and Tools:
10628 Implemented 3 new warnings for iASL, and implemented multiple warning
10632 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
10634 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
10635 check for the possible timeout, a warning is issued.
10637 2) Useless operators: If an ASL operator does not specify an optional
10639 operand and it also does not use the function return value from the
10640 operator, a warning is issued since the operator effectively does
10643 3) Unreferenced objects: If a namespace object is created, but never
10644 referenced, a warning is issued. This is a warning level 2 since there
10646 cases where this is ok, such as when a secondary table is loaded that
10648 the unreferenced objects. Even so, care is taken to only flag objects
10650 don't look like they will ever be used. For example, the reserved methods
10651 (starting with an underscore) are usually not referenced because it is
10652 expected that the OS will invoke them.
10654 ----------------------------------------
10655 31 March 2006. Summary of changes for version 20060331:
10657 1) ACPI CA Core Subsystem:
10659 Implemented header file support for the following additional ACPI tables:
10660 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
10662 all current and known ACPI tables are now defined in the ACPICA headers
10664 are available for use by device drivers and other software.
10666 Implemented support to allow tables that contain ACPI names with invalid
10667 characters to be loaded. Previously, this would cause the table load to
10668 fail, but since there are several known cases of such tables on existing
10669 machines, this change was made to enable ACPI support for them. Also,
10671 matches the behavior of the Microsoft ACPI implementation.
10673 Fixed a couple regressions introduced during the memory optimization in
10675 20060317 release. The namespace node definition required additional
10676 reorganization and an internal datatype that had been changed to 8-bit
10678 restored to 32-bit. (Valery Podrezov)
10680 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
10681 could be passed through to AcpiOsReleaseObject which is unexpected. Such
10682 null pointers are now trapped and ignored, matching the behavior of the
10683 previous implementation before the deployment of AcpiOsReleaseObject.
10684 (Valery Podrezov, Fiodor Suietov)
10686 Fixed a memory mapping leak during the deletion of a SystemMemory
10688 region where a cached memory mapping was not deleted. This became a
10689 noticeable problem for operation regions that are defined within
10691 used control methods. (Dana Meyers)
10693 Reorganized the ACPI table header files into two main files: one for the
10694 ACPI tables consumed by the ACPICA core, and another for the
10696 ACPI tables that are consumed by the drivers and other software. The
10698 FADT definitions were merged into one common section and three different
10699 tables (ACPI 1.0, 1.0+, and 2.0)
10701 Example Code and Data Size: These are the sizes for the OS-independent
10702 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10703 debug version of the code includes the debug output trace mechanism and
10705 a much larger code and data size.
10708 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
10709 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
10711 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
10712 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
10715 2) iASL Compiler/Disassembler and Tools:
10717 Disassembler: Implemented support to decode and format all non-AML ACPI
10718 tables (tables other than DSDTs and SSDTs.) This includes the new tables
10719 added to the ACPICA headers, therefore all current and known ACPI tables
10723 Disassembler: The change to allow ACPI names with invalid characters also
10724 enables the disassembly of such tables. Invalid characters within names
10726 changed to '*' to make the name printable; the iASL compiler will still
10727 generate an error for such names, however, since this is an invalid ACPI
10730 Implemented an option for AcpiXtract (-a) to extract all tables found in
10732 input file. The default invocation extracts only the DSDTs and SSDTs.
10734 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
10735 makefile for the AcpiXtract utility.
10737 ----------------------------------------
10738 17 March 2006. Summary of changes for version 20060317:
10740 1) ACPI CA Core Subsystem:
10742 Implemented the use of a cache object for all internal namespace nodes.
10743 Since there are about 1000 static nodes in a typical system, this will
10744 decrease memory use for cache implementations that minimize per-
10746 overhead (such as a slab allocator.)
10748 Removed the reference count mechanism for internal namespace nodes, since
10750 was deemed unnecessary. This reduces the size of each namespace node by
10751 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
10753 and 32 bytes for the 64-bit case.
10755 Optimized several internal data structures to reduce object size on 64-
10757 platforms by packing data within the 64-bit alignment. This includes the
10758 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
10759 instances corresponding to the namespace objects.
10761 Added two new strings for the predefined _OSI method: "Windows 2001.1
10763 and "Windows 2006".
10765 Split the allocation tracking mechanism out to a separate file, from
10766 utalloc.c to uttrack.c. This mechanism appears to be only useful for
10767 application-level code. Kernels may wish to not include uttrack.c in
10770 Removed all remnants of the obsolete ACPI_REPORT_* macros and the
10772 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
10775 Code and Data Size: These are the sizes for the acpica.lib produced by
10777 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
10779 driver or OSPM code. The debug version of the code includes the debug
10781 trace mechanism and has a much larger code and data size. Note that these
10782 values will vary depending on the efficiency of the compiler and the
10783 compiler options used during generation.
10786 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
10787 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
10789 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
10790 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
10793 2) iASL Compiler/Disassembler and Tools:
10795 Implemented an ANSI C version of the acpixtract utility. This version
10797 automatically extract the DSDT and all SSDTs from the input acpidump text
10798 file and dump the binary output to separate files. It can also display a
10799 summary of the input file including the headers for each table found and
10800 will extract any single ACPI table, with any signature. (See
10801 source/tools/acpixtract)
10803 ----------------------------------------
10804 10 March 2006. Summary of changes for version 20060310:
10806 1) ACPI CA Core Subsystem:
10808 Tagged all external interfaces to the subsystem with the new
10809 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
10811 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
10812 macro. The default definition is NULL.
10814 Added the ACPI_THREAD_ID type for the return value from
10816 This allows the host to define this as necessary to simplify kernel
10817 integration. The default definition is ACPI_NATIVE_UINT.
10819 Fixed two interpreter problems related to error processing, the deletion
10821 objects, and placing invalid pointers onto the internal operator result
10822 stack. BZ 6028, 6151 (Valery Podrezov)
10824 Increased the reference count threshold where a warning is emitted for
10826 reference counts in order to eliminate unnecessary warnings on systems
10828 large namespaces (especially 64-bit.) Increased the value from 0x400 to
10831 Due to universal disagreement as to the meaning of the 'c' in the
10833 function, the ACPI_MEM_CALLOCATE macro has been renamed to
10834 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
10835 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
10838 Code and Data Size: These are the sizes for the acpica.lib produced by
10840 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
10842 driver or OSPM code. The debug version of the code includes the debug
10844 trace mechanism and has a much larger code and data size. Note that these
10845 values will vary depending on the efficiency of the compiler and the
10846 compiler options used during generation.
10849 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
10850 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
10852 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
10853 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
10856 2) iASL Compiler/Disassembler:
10858 Disassembler: implemented support for symbolic resource descriptor
10859 references. If a CreateXxxxField operator references a fixed offset
10862 resource descriptor, a name is assigned to the descriptor and the offset
10864 translated to the appropriate resource tag and pathname. The addition of
10865 this support brings the disassembled code very close to the original ASL
10866 source code and helps eliminate run-time errors when the disassembled
10868 is modified (and recompiled) in such a way as to invalidate the original
10871 Implemented support for a Descriptor Name as the last parameter to the
10873 Register() macro. This parameter was inadvertently left out of the ACPI
10874 specification, and will be added for ACPI 3.0b.
10876 Fixed a problem where the use of the "_OSI" string (versus the full path
10877 "\_OSI") caused an internal compiler error. ("No back ptr to op")
10879 Fixed a problem with the error message that occurs when an invalid string
10881 used for a _HID object (such as one with an embedded asterisk:
10883 The correct message is now displayed.
10885 ----------------------------------------
10886 17 February 2006. Summary of changes for version 20060217:
10888 1) ACPI CA Core Subsystem:
10890 Implemented a change to the IndexField support to match the behavior of
10892 Microsoft AML interpreter. The value written to the Index register is now
10894 byte offset, no longer an index based upon the width of the Data
10896 This should fix IndexField problems seen on some machines where the Data
10897 register is not exactly one byte wide. The ACPI specification will be
10898 clarified on this point.
10900 Fixed a problem where several resource descriptor types could overrun the
10901 internal descriptor buffer due to size miscalculation: VendorShort,
10902 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
10903 affect all platforms.
10905 Fixed a problem where individual resource descriptors were misaligned
10907 the internal buffer, causing alignment faults on IA64 platforms.
10909 Code and Data Size: These are the sizes for the acpica.lib produced by
10911 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
10913 driver or OSPM code. The debug version of the code includes the debug
10915 trace mechanism and has a much larger code and data size. Note that these
10916 values will vary depending on the efficiency of the compiler and the
10917 compiler options used during generation.
10920 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
10921 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
10923 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
10924 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
10927 2) iASL Compiler/Disassembler:
10929 Implemented support for new reserved names: _WDG and _WED are Microsoft
10930 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
10931 defined method (Throttling Depth Limit.)
10933 Fixed a problem where a zero-length VendorShort or VendorLong resource
10934 descriptor was incorrectly emitted as a descriptor of length one.
10936 ----------------------------------------
10937 10 February 2006. Summary of changes for version 20060210:
10939 1) ACPI CA Core Subsystem:
10941 Removed a couple of extraneous ACPI_ERROR messages that appeared during
10942 normal execution. These became apparent after the conversion from
10945 Fixed a problem where the CreateField operator could hang if the BitIndex
10947 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
10949 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
10950 failed with an exception. This also fixes a couple of related RefOf and
10951 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
10953 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
10955 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
10959 Implemented a memory cleanup at the end of the execution of each
10961 of an AML While() loop, preventing the accumulation of outstanding
10963 (Valery Podrezov, BZ 5427)
10965 Eliminated a chunk of duplicate code in the object resolution code.
10969 Fixed several warnings during the 64-bit code generation.
10971 The AcpiSrc source code conversion tool now inserts one line of
10973 after an if() statement that is followed immediately by a comment,
10975 readability of the Linux code.
10977 Code and Data Size: The current and previous library sizes for the core
10978 subsystem are shown below. These are the code and data sizes for the
10979 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
10981 values do not include any ACPI driver or OSPM code. The debug version of
10983 code includes the debug output trace mechanism and has a much larger code
10984 and data size. Note that these values will vary depending on the
10986 of the compiler and the compiler options used during generation.
10989 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
10990 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
10992 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
10993 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
10996 2) iASL Compiler/Disassembler:
10998 Fixed a problem with the disassembly of a BankField operator with a
11000 expression for the BankValue parameter.
11002 ----------------------------------------
11003 27 January 2006. Summary of changes for version 20060127:
11005 1) ACPI CA Core Subsystem:
11007 Implemented support in the Resource Manager to allow unresolved
11009 references within resource package objects for the _PRT method. This
11011 is in addition to the previously implemented unresolved reference support
11012 within the AML parser. If the interpreter slack mode is enabled, these
11013 unresolved references will be passed through to the caller as a NULL
11017 Implemented and deployed new macros and functions for error and warning
11018 messages across the subsystem. These macros are simpler and generate less
11019 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
11020 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
11021 macros remain defined to allow ACPI drivers time to migrate to the new
11024 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
11026 Acquire/Release Lock OSL interfaces.
11028 Fixed a problem where Alias ASL operators are sometimes not correctly
11029 resolved, in both the interpreter and the iASL compiler.
11031 Fixed several problems with the implementation of the
11032 ConcatenateResTemplate
11033 ASL operator. As per the ACPI specification, zero length buffers are now
11034 treated as a single EndTag. One-length buffers always cause a fatal
11035 exception. Non-zero length buffers that do not end with a full 2-byte
11037 cause a fatal exception.
11039 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
11040 interface. (With assistance from Thomas Renninger)
11042 Code and Data Size: The current and previous library sizes for the core
11043 subsystem are shown below. These are the code and data sizes for the
11044 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11046 values do not include any ACPI driver or OSPM code. The debug version of
11048 code includes the debug output trace mechanism and has a much larger code
11049 and data size. Note that these values will vary depending on the
11051 of the compiler and the compiler options used during generation.
11054 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
11055 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
11057 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
11058 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
11061 2) iASL Compiler/Disassembler:
11063 Fixed an internal error that was generated for any forward references to
11067 ----------------------------------------
11068 13 January 2006. Summary of changes for version 20060113:
11070 1) ACPI CA Core Subsystem:
11072 Added 2006 copyright to all module headers and signons. This affects
11073 virtually every file in the ACPICA core subsystem, iASL compiler, and the
11076 Enhanced the ACPICA error reporting in order to simplify user migration
11078 the non-debug version of ACPICA. Replaced all instances of the
11079 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
11081 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
11082 respectively. This preserves all error and warning messages in the non-
11084 version of the ACPICA code (this has been referred to as the "debug lite"
11085 option.) Over 200 cases were converted to create a total of over 380
11086 error/warning messages across the ACPICA code. This increases the code
11088 data size of the default non-debug version of the code somewhat (about
11090 but all error/warning reporting may be disabled if desired (and code
11091 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
11092 configuration option. The size of the debug version of ACPICA remains
11096 Fixed a memory leak within the AML Debugger "Set" command. One object was
11097 not properly deleted for every successful invocation of the command.
11099 Code and Data Size: The current and previous library sizes for the core
11100 subsystem are shown below. These are the code and data sizes for the
11101 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11103 values do not include any ACPI driver or OSPM code. The debug version of
11105 code includes the debug output trace mechanism and has a much larger code
11106 and data size. Note that these values will vary depending on the
11108 of the compiler and the compiler options used during generation.
11111 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
11112 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
11114 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
11115 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
11118 2) iASL Compiler/Disassembler:
11120 The compiler now officially supports the ACPI 3.0a specification that was
11121 released on December 30, 2005. (Specification is available at
11124 ----------------------------------------
11125 16 December 2005. Summary of changes for version 20051216:
11127 1) ACPI CA Core Subsystem:
11129 Implemented optional support to allow unresolved names within ASL Package
11130 objects. A null object is inserted in the package when a named reference
11131 cannot be located in the current namespace. Enabled via the interpreter
11132 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
11134 that contain such code.
11136 Implemented an optimization to the initialization sequence that can
11138 boot time. During ACPI device initialization, the _STA method is now run
11140 and only if the _INI method exists. The _STA method is used to determine
11142 the device is present; An _INI can only be run if _STA returns present,
11144 it is a waste of time to run the _STA method if the _INI does not exist.
11145 (Prototype and assistance from Dong Wei)
11147 Implemented use of the C99 uintptr_t for the pointer casting macros if it
11149 available in the current compiler. Otherwise, the default (void *) cast
11153 Fixed some possible memory leaks found within the execution path of the
11154 Break, Continue, If, and CreateField operators. (Valery Podrezov)
11156 Fixed a problem introduced in the 20051202 release where an exception is
11157 generated during method execution if a control method attempts to declare
11160 Moved resource descriptor string constants that are used by both the AML
11161 disassembler and AML debugger to the common utilities directory so that
11162 these components are independent.
11164 Implemented support in the AcpiExec utility (-e switch) to globally
11166 exceptions during control method execution (method is not aborted.)
11168 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
11171 Code and Data Size: The current and previous library sizes for the core
11172 subsystem are shown below. These are the code and data sizes for the
11173 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11175 values do not include any ACPI driver or OSPM code. The debug version of
11177 code includes the debug output trace mechanism and has a much larger code
11178 and data size. Note that these values will vary depending on the
11180 of the compiler and the compiler options used during generation.
11183 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11184 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
11186 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
11187 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
11190 2) iASL Compiler/Disassembler:
11192 Fixed a problem where a CPU stack overflow fault could occur if a
11194 method call was made from within a Return statement.
11196 ----------------------------------------
11197 02 December 2005. Summary of changes for version 20051202:
11199 1) ACPI CA Core Subsystem:
11201 Modified the parsing of control methods to no longer create namespace
11202 objects during the first pass of the parse. Objects are now created only
11203 during the execute phase, at the moment the namespace creation operator
11205 encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
11207 should eliminate ALREADY_EXISTS exceptions seen on some machines where
11208 reentrant control methods are protected by an AML mutex. The mutex will
11210 correctly block multiple threads from attempting to create the same
11214 Increased the number of available Owner Ids for namespace object tracking
11215 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
11217 some machines with a large number of ACPI tables (either static or
11220 Fixed a problem with the AcpiExec utility where a fault could occur when
11222 -b switch (batch mode) is used.
11224 Enhanced the namespace dump routine to output the owner ID for each
11227 Code and Data Size: The current and previous library sizes for the core
11228 subsystem are shown below. These are the code and data sizes for the
11229 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11231 values do not include any ACPI driver or OSPM code. The debug version of
11233 code includes the debug output trace mechanism and has a much larger code
11234 and data size. Note that these values will vary depending on the
11236 of the compiler and the compiler options used during generation.
11239 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11240 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11242 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11243 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
11246 2) iASL Compiler/Disassembler:
11248 Fixed a parse error during compilation of certain Switch/Case constructs.
11250 simplify the parse, the grammar now allows for multiple Default
11252 and this error is now detected and flagged during the analysis phase.
11254 Disassembler: The disassembly now includes the contents of the original
11255 table header within a comment at the start of the file. This includes the
11256 name and version of the original ASL compiler.
11258 ----------------------------------------
11259 17 November 2005. Summary of changes for version 20051117:
11261 1) ACPI CA Core Subsystem:
11263 Fixed a problem in the AML parser where the method thread count could be
11264 decremented below zero if any errors occurred during the method parse
11266 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
11268 This also fixed a related regression with the mechanism that detects and
11269 corrects methods that cannot properly handle reentrancy (related to the
11270 deployment of the new OwnerId mechanism.)
11272 Eliminated the pre-parsing of control methods (to detect errors) during
11273 table load. Related to the problem above, this was causing unwind issues
11275 any errors occurred during the parse, and it seemed to be overkill. A
11277 load should not be aborted if there are problems with any single control
11278 method, thus rendering this feature rather pointless.
11280 Fixed a problem with the new table-driven resource manager where an
11282 buffer overflow could occur for small resource templates.
11284 Implemented a new external interface, AcpiGetVendorResource. This
11286 will find and return a vendor-defined resource descriptor within a _CRS
11288 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
11291 Removed the length limit (200) on string objects as per the upcoming ACPI
11292 3.0A specification. This affects the following areas of the interpreter:
11294 any implicit conversion of a Buffer to a String, 2) a String object
11296 of the ASL Concatentate operator, 3) the String object result of the ASL
11299 Fixed a problem in the Windows OS interface layer (OSL) where a
11301 on a semaphore object would incorrectly timeout. This allows the
11302 multithreading features of the AcpiExec utility to work properly under
11305 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
11306 the recently added file named "utresrc.c".
11308 Code and Data Size: The current and previous library sizes for the core
11309 subsystem are shown below. These are the code and data sizes for the
11310 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11312 values do not include any ACPI driver or OSPM code. The debug version of
11314 code includes the debug output trace mechanism and has a much larger code
11315 and data size. Note that these values will vary depending on the
11317 of the compiler and the compiler options used during generation.
11320 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
11321 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11323 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11324 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11327 2) iASL Compiler/Disassembler:
11329 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
11330 specification. For the iASL compiler, this means that string literals
11332 the source ASL can be of any length.
11334 Enhanced the listing output to dump the AML code for resource descriptors
11335 immediately after the ASL code for each descriptor, instead of in a block
11337 the end of the entire resource template.
11339 Enhanced the compiler debug output to dump the entire original parse tree
11340 constructed during the parse phase, before any transforms are applied to
11342 tree. The transformed tree is dumped also.
11344 ----------------------------------------
11345 02 November 2005. Summary of changes for version 20051102:
11347 1) ACPI CA Core Subsystem:
11349 Modified the subsystem initialization sequence to improve GPE support.
11351 GPE initialization has been split into two parts in order to defer
11353 of the _PRW methods (Power Resources for Wake) until after the hardware
11355 fully initialized and the SCI handler is installed. This allows the _PRW
11356 methods to access fields protected by the Global Lock. This will fix
11358 where a NO_GLOBAL_LOCK exception has been seen during initialization.
11360 Converted the ACPI internal object disassemble and display code within
11362 AML debugger to fully table-driven operation, reducing code size and
11363 increasing maintainability.
11365 Fixed a regression with the ConcatenateResTemplate() ASL operator
11367 in the 20051021 release.
11369 Implemented support for "local" internal ACPI object types within the
11370 debugger "Object" command and the AcpiWalkNamespace external interfaces.
11371 These local types include RegionFields, BankFields, IndexFields, Alias,
11375 Moved common AML resource handling code into a new file, "utresrc.c".
11377 code is shared by both the Resource Manager and the AML Debugger.
11379 Code and Data Size: The current and previous library sizes for the core
11380 subsystem are shown below. These are the code and data sizes for the
11381 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11383 values do not include any ACPI driver or OSPM code. The debug version of
11385 code includes the debug output trace mechanism and has a much larger code
11386 and data size. Note that these values will vary depending on the
11388 of the compiler and the compiler options used during generation.
11391 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
11392 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
11394 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
11395 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11398 2) iASL Compiler/Disassembler:
11400 Fixed a problem with very large initializer lists (more than 4000
11402 for both Buffer and Package objects where the parse stack could overflow.
11404 Enhanced the pre-compile source code scan for non-ASCII characters to
11406 characters within comment fields. The scan is now always performed and is
11408 longer optional, detecting invalid characters within a source file
11409 immediately rather than during the parse phase or later.
11411 Enhanced the ASL grammar definition to force early reductions on all
11413 style grammar elements so that the overall parse stack usage is greatly
11414 reduced. This should improve performance and reduce the possibility of
11418 Eliminated all reduce/reduce conflicts in the iASL parser generation.
11420 with the addition of a %expected statement, the compiler generates from
11421 source with no warnings.
11423 Fixed a possible segment fault in the disassembler if the input filename
11424 does not contain a "dot" extension (Thomas Renninger).
11426 ----------------------------------------
11427 21 October 2005. Summary of changes for version 20051021:
11429 1) ACPI CA Core Subsystem:
11431 Implemented support for the EM64T and other x86-64 processors. This
11432 essentially entails recognizing that these processors support non-aligned
11433 memory transfers. Previously, all 64-bit processors were assumed to lack
11434 hardware support for non-aligned transfers.
11436 Completed conversion of the Resource Manager to nearly full table-driven
11437 operation. Specifically, the resource conversion code (convert AML to
11438 internal format and the reverse) and the debug code to dump internal
11439 resource descriptors are fully table-driven, reducing code and data size
11441 improving maintainability.
11443 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
11445 on 64-bit processors instead of a fixed 32-bit word. (With assistance
11447 Alexey Starikovskiy)
11449 Implemented support within the resource conversion code for the Type-
11450 Specific byte within the various ACPI 3.0 *WordSpace macros.
11452 Fixed some issues within the resource conversion code for the type-
11454 flags for both Memory and I/O address resource descriptors. For Memory,
11455 implemented support for the MTP and TTP flags. For I/O, split the TRS and
11456 TTP flags into two separate fields.
11458 Code and Data Size: The current and previous library sizes for the core
11459 subsystem are shown below. These are the code and data sizes for the
11460 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11462 values do not include any ACPI driver or OSPM code. The debug version of
11464 code includes the debug output trace mechanism and has a much larger code
11465 and data size. Note that these values will vary depending on the
11467 of the compiler and the compiler options used during generation.
11470 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
11471 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
11473 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
11474 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
11478 2) iASL Compiler/Disassembler:
11480 Relaxed a compiler restriction that disallowed a ResourceIndex byte if
11482 corresponding ResourceSource string was not also present in a resource
11483 descriptor declaration. This restriction caused problems with existing
11484 AML/ASL code that includes the Index byte without the string. When such
11486 was disassembled, it could not be compiled without modification. Further,
11487 the modified code created a resource template with a different size than
11489 original, breaking code that used fixed offsets into the resource
11493 Removed a recent feature of the disassembler to ignore a lone
11495 byte. This byte is now emitted if present so that the exact AML can be
11496 reproduced when the disassembled code is recompiled.
11498 Improved comments and text alignment for the resource descriptor code
11499 emitted by the disassembler.
11501 Implemented disassembler support for the ACPI 3.0 AccessSize field within
11503 Register() resource descriptor.
11505 ----------------------------------------
11506 30 September 2005. Summary of changes for version 20050930:
11508 1) ACPI CA Core Subsystem:
11510 Completed a major overhaul of the Resource Manager code - specifically,
11511 optimizations in the area of the AML/internal resource conversion code.
11513 code has been optimized to simplify and eliminate duplicated code, CPU
11515 use has been decreased by optimizing function parameters and local
11516 variables, and naming conventions across the manager have been
11518 for clarity and ease of maintenance (this includes function, parameter,
11519 variable, and struct/typedef names.) The update may force changes in some
11520 driver code, depending on how resources are handled by the host OS.
11522 All Resource Manager dispatch and information tables have been moved to a
11523 single location for clarity and ease of maintenance. One new file was
11524 created, named "rsinfo.c".
11526 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
11527 guarantee that the argument is not evaluated twice, making them less
11529 to macro side-effects. However, since there exists the possibility of
11530 additional stack use if a particular compiler cannot optimize them (such
11532 in the debug generation case), the original macros are optionally
11534 Note that some invocations of the return_VALUE macro may now cause size
11535 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
11537 eliminate these. (From Randy Dunlap)
11539 Implemented a new mechanism to enable debug tracing for individual
11541 methods. A new external interface, AcpiDebugTrace, is provided to enable
11542 this mechanism. The intent is to allow the host OS to easily enable and
11543 disable tracing for problematic control methods. This interface can be
11544 easily exposed to a user or debugger interface if desired. See the file
11545 psxface.c for details.
11547 AcpiUtCallocate will now return a valid pointer if a length of zero is
11548 specified - a length of one is used and a warning is issued. This matches
11549 the behavior of AcpiUtAllocate.
11551 Code and Data Size: The current and previous library sizes for the core
11552 subsystem are shown below. These are the code and data sizes for the
11553 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11555 values do not include any ACPI driver or OSPM code. The debug version of
11557 code includes the debug output trace mechanism and has a much larger code
11558 and data size. Note that these values will vary depending on the
11560 of the compiler and the compiler options used during generation.
11563 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
11564 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
11566 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
11567 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
11570 2) iASL Compiler/Disassembler:
11572 A remark is issued if the effective compile-time length of a package or
11573 buffer is zero. Previously, this was a warning.
11575 ----------------------------------------
11576 16 September 2005. Summary of changes for version 20050916:
11578 1) ACPI CA Core Subsystem:
11580 Fixed a problem within the Resource Manager where support for the Generic
11581 Register descriptor was not fully implemented. This descriptor is now
11583 recognized, parsed, disassembled, and displayed.
11585 Completely restructured the Resource Manager code to utilize table-driven
11586 dispatch and lookup, eliminating many of the large switch() statements.
11588 reduces overall subsystem code size and code complexity. Affects the
11589 resource parsing and construction, disassembly, and debug dump output.
11591 Cleaned up and restructured the debug dump output for all resource
11592 descriptors. Improved readability of the output and reduced code size.
11594 Fixed a problem where changes to internal data structures caused the
11595 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
11597 Code and Data Size: The current and previous library sizes for the core
11598 subsystem are shown below. These are the code and data sizes for the
11599 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11601 values do not include any ACPI driver or OSPM code. The debug version of
11603 code includes the debug output trace mechanism and has a much larger code
11604 and data size. Note that these values will vary depending on the
11606 of the compiler and the compiler options used during generation.
11609 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
11610 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
11612 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
11613 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
11616 2) iASL Compiler/Disassembler:
11618 Updated the disassembler to automatically insert an EndDependentFn()
11620 into the ASL stream if this macro is missing in the original AML code,
11621 simplifying compilation of the resulting ASL module.
11623 Fixed a problem in the disassembler where a disassembled ResourceSource
11624 string (within a large resource descriptor) was not surrounded by quotes
11626 not followed by a comma, causing errors when the resulting ASL module was
11627 compiled. Also, escape sequences within a ResourceSource string are now
11628 handled correctly (especially "\\")
11630 ----------------------------------------
11631 02 September 2005. Summary of changes for version 20050902:
11633 1) ACPI CA Core Subsystem:
11635 Fixed a problem with the internal Owner ID allocation and deallocation
11636 mechanisms for control method execution and recursive method invocation.
11637 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
11638 messages seen on some systems. Recursive method invocation depth is
11639 currently limited to 255. (Alexey Starikovskiy)
11641 Completely eliminated all vestiges of support for the "module-level
11642 executable code" until this support is fully implemented and debugged.
11644 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
11645 some systems that invoke this support.
11647 Fixed a problem within the resource manager code where the transaction
11649 for a 64-bit address descriptor were handled incorrectly in the type-
11650 specific flag byte.
11652 Consolidated duplicate code within the address descriptor resource
11654 code, reducing overall subsystem code size.
11656 Fixed a fault when using the AML debugger "disassemble" command to
11657 disassemble individual control methods.
11659 Removed references to the "release_current" directory within the Unix
11662 Code and Data Size: The current and previous core subsystem library sizes
11663 are shown below. These are the code and data sizes for the acpica.lib
11664 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
11665 include any ACPI driver or OSPM code. The debug version of the code
11667 the debug output trace mechanism and has a much larger code and data
11669 Note that these values will vary depending on the efficiency of the
11671 and the compiler options used during generation.
11674 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11675 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
11677 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
11678 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
11681 2) iASL Compiler/Disassembler:
11683 Implemented an error check for illegal duplicate values in the interrupt
11685 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
11688 Implemented error checking for the Irq() and IrqNoFlags() macros to
11690 too many values in the interrupt list (16 max) and invalid values in the
11691 list (range 0 - 15)
11693 The maximum length string literal within an ASL file is now restricted to
11694 200 characters as per the ACPI specification.
11696 Fixed a fault when using the -ln option (generate namespace listing).
11698 Implemented an error check to determine if a DescriptorName within a
11699 resource descriptor has already been used within the current scope.
11701 ----------------------------------------
11702 15 August 2005. Summary of changes for version 20050815:
11704 1) ACPI CA Core Subsystem:
11706 Implemented a full bytewise compare to determine if a table load request
11708 attempting to load a duplicate table. The compare is performed if the
11710 signatures and table lengths match. This will allow different tables with
11711 the same OEM Table ID and revision to be loaded - probably against the
11713 specification, but discovered in the field nonetheless.
11715 Added the changes.txt logfile to each of the zipped release packages.
11717 Code and Data Size: Current and previous core subsystem library sizes are
11718 shown below. These are the code and data sizes for the acpica.lib
11720 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11721 any ACPI driver or OSPM code. The debug version of the code includes the
11722 debug output trace mechanism and has a much larger code and data size.
11724 that these values will vary depending on the efficiency of the compiler
11726 the compiler options used during generation.
11729 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11730 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
11732 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11733 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
11736 2) iASL Compiler/Disassembler:
11738 Fixed a problem where incorrect AML code could be generated for Package
11739 objects if optimization is disabled (via the -oa switch).
11741 Fixed a problem with where incorrect AML code is generated for variable-
11742 length packages when the package length is not specified and the number
11744 initializer values is greater than 255.
11747 ----------------------------------------
11748 29 July 2005. Summary of changes for version 20050729:
11750 1) ACPI CA Core Subsystem:
11752 Implemented support to ignore an attempt to install/load a particular
11754 table more than once. Apparently there exists BIOS code that repeatedly
11755 attempts to load the same SSDT upon certain events. With assistance from
11756 Venkatesh Pallipadi.
11758 Restructured the main interface to the AML parser in order to correctly
11759 handle all exceptional conditions. This will prevent leakage of the
11761 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
11763 machines. With assistance from Alexey Starikovskiy.
11765 Support for "module level code" has been disabled in this version due to
11767 number of issues that have appeared on various machines. The support can
11769 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
11770 compilation. When the issues are fully resolved, the code will be enabled
11774 Modified the internal functions for debug print support to define the
11775 FunctionName parameter as a (const char *) for compatibility with
11777 built-in macros such as __FUNCTION__, etc.
11779 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
11781 Implemented support to display an object count summary for the AML
11783 commands Object and Methods.
11785 Code and Data Size: Current and previous core subsystem library sizes are
11786 shown below. These are the code and data sizes for the acpica.lib
11788 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11789 any ACPI driver or OSPM code. The debug version of the code includes the
11790 debug output trace mechanism and has a much larger code and data size.
11792 that these values will vary depending on the efficiency of the compiler
11794 the compiler options used during generation.
11797 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
11798 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
11800 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11801 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
11804 2) iASL Compiler/Disassembler:
11806 Fixed a regression that appeared in the 20050708 version of the compiler
11807 where an error message was inadvertently emitted for invocations of the
11809 reserved control method.
11811 ----------------------------------------
11812 08 July 2005. Summary of changes for version 20050708:
11814 1) ACPI CA Core Subsystem:
11816 The use of the CPU stack in the debug version of the subsystem has been
11817 considerably reduced. Previously, a debug structure was declared in every
11818 function that used the debug macros. This structure has been removed in
11819 favor of declaring the individual elements as parameters to the debug
11820 functions. This reduces the cumulative stack use during nested execution
11822 ACPI function calls at the cost of a small increase in the code size of
11824 debug version of the subsystem. With assistance from Alexey Starikovskiy
11828 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
11829 headers to define a macro that will return the current function name at
11830 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
11832 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
11833 compiler-dependent header, the function name is saved on the CPU stack
11835 pointer per function.) This mechanism is used because apparently there
11836 exists no standard ANSI-C defined macro that that returns the function
11839 Redesigned and reimplemented the "Owner ID" mechanism used to track
11840 namespace objects created/deleted by ACPI tables and control method
11841 execution. A bitmap is now used to allocate and free the IDs, thus
11843 the wraparound problem present in the previous implementation. The size
11845 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
11848 Removed the UINT32_BIT and UINT16_BIT types that were used for the
11850 flag definitions within the headers for the predefined ACPI tables. These
11851 have been replaced by UINT8_BIT in order to increase the code portability
11853 the subsystem. If the use of UINT8 remains a problem, we may be forced to
11854 eliminate bitfields entirely because of a lack of portability.
11856 Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
11858 is a frequently used function and this improvement increases the
11860 of the entire subsystem (Alexey Starikovskiy).
11862 Fixed several possible memory leaks and the inverse - premature object
11863 deletion (Alexey Starikovskiy).
11865 Code and Data Size: Current and previous core subsystem library sizes are
11866 shown below. These are the code and data sizes for the acpica.lib
11868 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11869 any ACPI driver or OSPM code. The debug version of the code includes the
11870 debug output trace mechanism and has a much larger code and data size.
11872 that these values will vary depending on the efficiency of the compiler
11874 the compiler options used during generation.
11877 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
11878 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
11880 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
11881 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
11883 ----------------------------------------
11884 24 June 2005. Summary of changes for version 20050624:
11886 1) ACPI CA Core Subsystem:
11888 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
11889 the host-defined cache object. This allows the OSL implementation to
11891 and type this object in any manner desired, simplifying the OSL
11892 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
11893 Linux, and should be defined in the OS-specific header file for other
11894 operating systems as required.
11896 Changed the interface to AcpiOsAcquireObject to directly return the
11897 requested object as the function return (instead of ACPI_STATUS.) This
11898 change was made for performance reasons, since this is the purpose of the
11899 interface in the first place. AcpiOsAcquireObject is now similar to the
11900 AcpiOsAllocate interface.
11902 Implemented a new AML debugger command named Businfo. This command
11904 information about all devices that have an associate _PRT object. The
11906 _HID, _UID, and _CID are displayed for these devices.
11908 Modified the initialization sequence in AcpiInitializeSubsystem to call
11910 OSL interface AcpiOslInitialize first, before any local initialization.
11912 change was required because the global initialization now calls OSL
11915 Enhanced the Dump command to display the entire contents of Package
11917 (including all sub-objects and their values.)
11919 Restructured the code base to split some files because of size and/or
11920 because the code logically belonged in a separate file. New files are
11922 below. All makefiles and project files included in the ACPI CA release
11925 utilities/utcache.c /* Local cache interfaces */
11926 utilities/utmutex.c /* Local mutex support */
11927 utilities/utstate.c /* State object support */
11928 interpreter/parser/psloop.c /* Main AML parse loop */
11930 Code and Data Size: Current and previous core subsystem library sizes are
11931 shown below. These are the code and data sizes for the acpica.lib
11933 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11934 any ACPI driver or OSPM code. The debug version of the code includes the
11935 debug output trace mechanism and has a much larger code and data size.
11937 that these values will vary depending on the efficiency of the compiler
11939 the compiler options used during generation.
11942 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
11943 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
11945 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
11946 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
11949 2) iASL Compiler/Disassembler:
11951 Fixed a regression introduced in version 20050513 where the use of a
11953 object within a Case() statement caused a compile time exception. The
11954 original behavior has been restored (a Match() operator is emitted.)
11956 ----------------------------------------
11957 17 June 2005. Summary of changes for version 20050617:
11959 1) ACPI CA Core Subsystem:
11961 Moved the object cache operations into the OS interface layer (OSL) to
11963 the host OS to handle these operations if desired (for example, the Linux
11964 OSL will invoke the slab allocator). This support is optional; the
11966 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
11968 code in the ACPI CA core. The new OSL interfaces are shown below. See
11969 utalloc.c for an example implementation, and acpiosxf.h for the exact
11970 interface definitions. With assistance from Alexey Starikovskiy.
11974 AcpiOsAcquireObject
11975 AcpiOsReleaseObject
11977 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
11979 and restore a flags parameter. This fits better with many OS lock models.
11980 Note: the current execution state (interrupt handler or not) is no longer
11981 passed to these interfaces. If necessary, the OSL must determine this
11983 by itself, a simple and fast operation. With assistance from Alexey
11986 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
11987 present if the revision of the RSDP was 2 or greater. According to the
11989 specification, the XSDT is optional in all cases, and the table manager
11990 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
11991 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
11995 Fixed an interpreter problem with the Mid() operator in the case of an
11997 string where the resulting output string is of zero length. It now
11999 returns a valid, null terminated string object instead of a string object
12000 with a null pointer.
12002 Fixed a problem with the control method argument handling to allow a
12004 to an Arg object that already contains an object of type Device. The
12006 object is now correctly overwritten. Previously, an error was returned.
12009 Enhanced the debugger Find command to emit object values in addition to
12011 found object pathnames. The output format is the same as the dump
12015 Enhanced the debugger Set command. It now has the ability to set the
12017 of any Named integer object in the namespace (Previously, only method
12019 and args could be set.)
12021 Code and Data Size: Current and previous core subsystem library sizes are
12022 shown below. These are the code and data sizes for the acpica.lib
12024 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12025 any ACPI driver or OSPM code. The debug version of the code includes the
12026 debug output trace mechanism and has a much larger code and data size.
12028 that these values will vary depending on the efficiency of the compiler
12030 the compiler options used during generation.
12033 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
12034 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
12036 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
12037 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
12040 2) iASL Compiler/Disassembler:
12042 Fixed a regression in the disassembler where if/else/while constructs
12044 output incorrectly. This problem was introduced in the previous release
12045 (20050526). This problem also affected the single-step disassembly in the
12048 Fixed a problem where compiling the reserved _OSI method would randomly
12050 rarely) produce compile errors.
12052 Enhanced the disassembler to emit compilable code in the face of
12054 AML resource descriptors. If the optional ResourceSourceIndex is present,
12055 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
12056 disassembly. Otherwise, the resulting code cannot be compiled without
12059 ----------------------------------------
12060 26 May 2005. Summary of changes for version 20050526:
12062 1) ACPI CA Core Subsystem:
12064 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
12065 the module level (not within a control method.) These opcodes are
12067 exactly once at the time the table is loaded. This type of code was legal
12069 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
12071 order to provide backwards compatibility with earlier BIOS
12073 This eliminates the "Encountered executable code at module level" warning
12074 that was previously generated upon detection of such code.
12076 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
12077 inadvertently be generated during the lookup of namespace objects in the
12078 second pass parse of ACPI tables and control methods. It appears that
12080 problem could occur during the resolution of forward references to
12084 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
12085 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
12086 allows the deadlock detection debug code to be compiled out in the normal
12087 case, improving mutex performance (and overall subsystem performance)
12090 Implemented a handful of miscellaneous fixes for possible memory leaks on
12091 error conditions and error handling control paths. These fixes were
12092 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
12094 Added a check for a null RSDT pointer in AcpiGetFirmwareTable
12096 to prevent a fault in this error case.
12098 Code and Data Size: Current and previous core subsystem library sizes are
12099 shown below. These are the code and data sizes for the acpica.lib
12101 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12102 any ACPI driver or OSPM code. The debug version of the code includes the
12103 debug output trace mechanism and has a much larger code and data size.
12105 that these values will vary depending on the efficiency of the compiler
12107 the compiler options used during generation.
12110 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12111 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12113 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
12114 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
12117 2) iASL Compiler/Disassembler:
12119 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
12120 the module level (not within a control method.) These operators will be
12121 executed once at the time the table is loaded. This type of code was
12123 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
12124 compiler in order to provide backwards compatibility with earlier BIOS
12128 The ACPI integer width (specified via the table revision ID or the -r
12129 override, 32 or 64 bits) is now used internally during compile-time
12131 folding to ensure that constants are truncated to 32 bits if necessary.
12132 Previously, the revision ID value was only emitted in the AML table
12135 An error message is now generated for the Mutex and Method operators if
12137 SyncLevel parameter is outside the legal range of 0 through 15.
12139 Fixed a problem with the Method operator ParameterTypes list handling
12141 3.0). Previously, more than 2 types or 2 arguments generated a syntax
12143 The actual underlying implementation of method argument typechecking is
12144 still under development, however.
12146 ----------------------------------------
12147 13 May 2005. Summary of changes for version 20050513:
12149 1) ACPI CA Core Subsystem:
12151 Implemented support for PCI Express root bridges -- added support for
12153 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
12155 The interpreter now automatically truncates incoming 64-bit constants to
12157 bits if currently executing out of a 32-bit ACPI table (Revision < 2).
12159 also affects the iASL compiler constant folding. (Note: as per below, the
12160 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
12162 Fixed a problem where string and buffer objects with "static" pointers
12163 (pointers to initialization data within an ACPI table) were not handled
12164 consistently. The internal object copy operation now always copies the
12166 to a newly allocated buffer, regardless of whether the source object is
12169 Fixed a problem with the FromBCD operator where an implicit result
12170 conversion was improperly performed while storing the result to the
12172 operand. Since this is an "explicit conversion" operator, the implicit
12173 conversion should never be performed on the output.
12175 Fixed a problem with the CopyObject operator where a copy to an existing
12176 named object did not always completely overwrite the existing object
12178 at name. Specifically, a buffer-to-buffer copy did not delete the
12182 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
12184 structs for consistency.
12186 Code and Data Size: Current and previous core subsystem library sizes are
12187 shown below. These are the code and data sizes for the acpica.lib
12189 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12190 any ACPI driver or OSPM code. The debug version of the code includes the
12191 debug output trace mechanism and has a much larger code and data size.
12193 that these values will vary depending on the efficiency of the compiler
12195 the compiler options used during generation.
12198 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12199 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12200 Current Release: (Same sizes)
12201 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12202 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12205 2) iASL Compiler/Disassembler:
12207 The compiler now emits a warning if an attempt is made to generate a 64-
12209 integer constant from within a 32-bit ACPI table (Revision < 2). The
12211 is truncated to 32 bits.
12213 Fixed a problem with large package objects: if the static length of the
12214 package is greater than 255, the "variable length package" opcode is
12215 emitted. Previously, this caused an error. This requires an update to the
12216 ACPI spec, since it currently (incorrectly) states that packages larger
12218 255 elements are not allowed.
12220 The disassembler now correctly handles variable length packages and
12222 larger than 255 elements.
12224 ----------------------------------------
12225 08 April 2005. Summary of changes for version 20050408:
12227 1) ACPI CA Core Subsystem:
12229 Fixed three cases in the interpreter where an "index" argument to an ASL
12230 function was still (internally) 32 bits instead of the required 64 bits.
12231 This was the Index argument to the Index, Mid, and Match operators.
12233 The "strupr" function is now permanently local (AcpiUtStrupr), since this
12235 not a POSIX-defined function and not present in most kernel-level C
12236 libraries. All references to the C library strupr function have been
12240 Completed the deployment of static functions/prototypes. All prototypes
12242 the static attribute have been moved from the headers to the owning C
12245 Implemented an extract option (-e) for the AcpiBin utility (AML binary
12246 utility). This option allows the utility to extract individual ACPI
12248 from the output of AcpiDmp. It provides the same functionality of the
12249 acpixtract.pl perl script without the worry of setting the correct perl
12250 options. AcpiBin runs on Windows and has not yet been generated/validated
12252 the Linux/Unix environment (but should be soon).
12254 Updated and fixed the table dump option for AcpiBin (-d). This option
12255 converts a single ACPI table to a hex/ascii file, similar to the output
12259 Code and Data Size: Current and previous core subsystem library sizes are
12260 shown below. These are the code and data sizes for the acpica.lib
12262 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12263 any ACPI driver or OSPM code. The debug version of the code includes the
12264 debug output trace mechanism and has a much larger code and data size.
12266 that these values will vary depending on the efficiency of the compiler
12268 the compiler options used during generation.
12271 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
12272 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
12274 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12275 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12278 2) iASL Compiler/Disassembler:
12280 Disassembler fix: Added a check to ensure that the table length found in
12282 ACPI table header within the input file is not longer than the actual
12284 file size. This indicates some kind of file or table corruption.
12286 ----------------------------------------
12287 29 March 2005. Summary of changes for version 20050329:
12289 1) ACPI CA Core Subsystem:
12291 An error is now generated if an attempt is made to create a Buffer Field
12293 length zero (A CreateField with a length operand of zero.)
12295 The interpreter now issues a warning whenever executable code at the
12297 level is detected during ACPI table load. This will give some idea of the
12298 prevalence of this type of code.
12300 Implemented support for references to named objects (other than control
12301 methods) within package objects.
12303 Enhanced package object output for the debug object. Package objects are
12305 completely dumped, showing all elements.
12307 Enhanced miscellaneous object output for the debug object. Any object can
12308 now be written to the debug object (for example, a device object can be
12309 written, and the type of the object will be displayed.)
12311 The "static" qualifier has been added to all local functions across both
12313 core subsystem and the iASL compiler.
12315 The number of "long" lines (> 80 chars) within the source has been
12316 significantly reduced, by about 1/3.
12318 Cleaned up all header files to ensure that all CA/iASL functions are
12319 prototyped (even static functions) and the formatting is consistent.
12321 Two new header files have been added, acopcode.h and acnames.h.
12323 Removed several obsolete functions that were no longer used.
12325 Code and Data Size: Current and previous core subsystem library sizes are
12326 shown below. These are the code and data sizes for the acpica.lib
12328 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12329 any ACPI driver or OSPM code. The debug version of the code includes the
12330 debug output trace mechanism and has a much larger code and data size.
12332 that these values will vary depending on the efficiency of the compiler
12334 the compiler options used during generation.
12337 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12338 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
12340 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
12341 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
12345 2) iASL Compiler/Disassembler:
12347 Fixed a problem with the resource descriptor generation/support. For the
12348 ResourceSourceIndex and the ResourceSource fields, both must be present,
12350 both must be not present - can't have one without the other.
12352 The compiler now returns non-zero from the main procedure if any errors
12354 occurred during the compilation.
12357 ----------------------------------------
12358 09 March 2005. Summary of changes for version 20050309:
12360 1) ACPI CA Core Subsystem:
12362 The string-to-buffer implicit conversion code has been modified again
12364 a change to the ACPI specification. In order to match the behavior of
12366 other major ACPI implementation, the target buffer is no longer truncated
12368 the source string is smaller than an existing target buffer. This change
12369 requires an update to the ACPI spec, and should eliminate the recent
12370 AE_AML_BUFFER_LIMIT issues.
12372 The "implicit return" support was rewritten to a new algorithm that
12374 the general case. Rather than attempt to determine when a method is about
12376 exit, the result of every ASL operator is saved momentarily until the
12378 next ASL operator is executed. Therefore, no matter how the method exits,
12379 there will always be a saved implicit return value. This feature is only
12380 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
12382 AE_AML_NO_RETURN_VALUE errors when enabled.
12384 Implemented implicit conversion support for the predicate (operand) of
12386 If, Else, and While operators. String and Buffer arguments are
12388 converted to Integers.
12390 Changed the string-to-integer conversion behavior to match the new ACPI
12391 errata: "If no integer object exists, a new integer is created. The ASCII
12392 string is interpreted as a hexadecimal constant. Each string character is
12393 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
12394 with the first character as the most significant digit, and ending with
12396 first non-hexadecimal character or end-of-string." This means that the
12398 non-hex character terminates the conversion and this is the code that was
12401 Fixed a problem where the ObjectType operator would fail (fault) when
12403 on an Index of a Package which pointed to a null package element. The
12404 operator now properly returns zero (Uninitialized) in this case.
12406 Fixed a problem where the While operator used excessive memory by not
12407 properly popping the result stack during execution. There was no memory
12409 after execution, however. (Code provided by Valery Podrezov.)
12411 Fixed a problem where references to control methods within Package
12413 caused the method to be invoked, instead of producing a reference object
12414 pointing to the method.
12416 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
12418 improve performance and reduce code size. (Code provided by Alexey
12421 Code and Data Size: Current and previous core subsystem library sizes are
12422 shown below. These are the code and data sizes for the acpica.lib
12424 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12425 any ACPI driver or OSPM code. The debug version of the code includes the
12426 debug output trace mechanism and has a much larger code and data size.
12428 that these values will vary depending on the efficiency of the compiler
12430 the compiler options used during generation.
12433 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12434 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
12436 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12437 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
12440 2) iASL Compiler/Disassembler:
12442 Fixed a problem with the Return operator with no arguments. Since the AML
12443 grammar for the byte encoding requires an operand for the Return opcode,
12445 compiler now emits a Return(Zero) for this case. An ACPI specification
12446 update has been written for this case.
12448 For tables other than the DSDT, namepath optimization is automatically
12449 disabled. This is because SSDTs can be loaded anywhere in the namespace,
12451 compiler has no knowledge of where, and thus cannot optimize namepaths.
12453 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
12454 inadvertently omitted from the ACPI specification, and will require an
12455 update to the spec.
12457 The source file scan for ASCII characters is now optional (-a). This
12459 was made because some vendors place non-ascii characters within comments.
12460 However, the scan is simply a brute-force byte compare to ensure all
12461 characters in the file are in the range 0x00 to 0x7F.
12463 Fixed a problem with the CondRefOf operator where the compiler was
12464 inappropriately checking for the existence of the target. Since the point
12466 the operator is to check for the existence of the target at run-time, the
12467 compiler no longer checks for the target existence.
12469 Fixed a problem where errors generated from the internal AML interpreter
12470 during constant folding were not handled properly, causing a fault.
12472 Fixed a problem with overly aggressive range checking for the Stall
12473 operator. The valid range (max 255) is now only checked if the operand is
12475 type Integer. All other operand types cannot be statically checked.
12477 Fixed a problem where control method references within the RefOf,
12479 and ObjectType operators were not treated properly. They are now treated
12481 actual references, not method invocations.
12483 Fixed and enhanced the "list namespace" option (-ln). This option was
12485 a number of releases ago.
12487 Improved error handling for the Field, IndexField, and BankField
12489 The compiler now cleanly reports and recovers from errors in the field
12490 component (FieldUnit) list.
12492 Fixed a disassembler problem where the optional ResourceDescriptor fields
12493 TRS and TTP were not always handled correctly.
12495 Disassembler - Comments in output now use "//" instead of "/*"
12497 ----------------------------------------
12498 28 February 2005. Summary of changes for version 20050228:
12500 1) ACPI CA Core Subsystem:
12502 Fixed a problem where the result of an Index() operator (an object
12503 reference) must increment the reference count on the target object for
12505 life of the object reference.
12507 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
12508 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
12510 resource descriptors.
12512 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
12513 Space Descriptor" string, indicating interpreter support for the
12517 Implemented header support for the new ACPI 3.0 FADT flag bits.
12519 Implemented header support for the new ACPI 3.0 PCI Express bits for the
12521 status/enable registers.
12523 Updated header support for the MADT processor local Apic struct and MADT
12524 platform interrupt source struct for new ACPI 3.0 fields.
12526 Implemented header support for the SRAT and SLIT ACPI tables.
12528 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
12532 Code and Data Size: Current and previous core subsystem library sizes are
12533 shown below. These are the code and data sizes for the acpica.lib
12535 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12536 any ACPI driver or OSPM code. The debug version of the code includes the
12537 debug output trace mechanism and has a much larger code and data size.
12539 that these values will vary depending on the efficiency of the compiler
12541 the compiler options used during generation.
12544 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
12545 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
12547 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12548 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
12551 2) iASL Compiler/Disassembler:
12553 Fixed a problem with the internal 64-bit String-to-integer conversion
12555 strings less than two characters long.
12557 Fixed a problem with constant folding where the result of the Index()
12558 operator can not be considered a constant. This means that Index() cannot
12560 a type3 opcode and this will require an update to the ACPI specification.
12562 Disassembler: Implemented support for the TTP, MTP, and TRS resource
12563 descriptor fields. These fields were inadvertently ignored and not output
12565 the disassembly of the resource descriptor.
12568 ----------------------------------------
12569 11 February 2005. Summary of changes for version 20050211:
12571 1) ACPI CA Core Subsystem:
12573 Implemented ACPI 3.0 support for implicit conversion within the Match()
12574 operator. MatchObjects can now be of type integer, buffer, or string
12576 of just type integer. Package elements are implicitly converted to the
12578 of the MatchObject. This change aligns the behavior of Match() with the
12579 behavior of the other logical operators (LLess(), etc.) It also requires
12581 errata change to the ACPI specification as this support was intended for
12582 ACPI 3.0, but was inadvertently omitted.
12584 Fixed a problem with the internal implicit "to buffer" conversion.
12586 that are converted to buffers will cause buffer truncation if the string
12588 smaller than the target buffer. Integers that are converted to buffers
12590 not cause buffer truncation, only zero extension (both as per the ACPI
12591 spec.) The problem was introduced when code was added to truncate the
12592 buffer, but this should not be performed in all cases, only the string
12595 Fixed a problem with the Buffer and Package operators where the
12597 would get confused if two such operators were used as operands to an ASL
12598 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
12599 stack was not being popped after the execution of these operators,
12601 in an AE_NO_RETURN_VALUE exception.
12603 Fixed a problem with constructs of the form Store(Index(...),...). The
12604 reference object returned from Index was inadvertently resolved to an
12606 value. This problem was introduced in version 20050114 when the behavior
12608 Store() was modified to restrict the object types that can be used as the
12609 source operand (to match the ACPI specification.)
12611 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
12613 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
12615 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
12617 Code and Data Size: Current and previous core subsystem library sizes are
12618 shown below. These are the code and data sizes for the acpica.lib
12620 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12621 any ACPI driver or OSPM code. The debug version of the code includes the
12622 debug output trace mechanism and has a much larger code and data size.
12624 that these values will vary depending on the efficiency of the compiler
12626 the compiler options used during generation.
12629 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
12630 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
12632 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
12633 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
12636 2) iASL Compiler/Disassembler:
12638 Fixed a code generation problem in the constant folding optimization code
12639 where incorrect code was generated if a constant was reduced to a buffer
12640 object (i.e., a reduced type 5 opcode.)
12642 Fixed a typechecking problem for the ToBuffer operator. Caused by an
12643 incorrect return type in the internal opcode information table.
12645 ----------------------------------------
12646 25 January 2005. Summary of changes for version 20050125:
12648 1) ACPI CA Core Subsystem:
12650 Fixed a recently introduced problem with the Global Lock where the
12651 underlying semaphore was not created. This problem was introduced in
12652 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
12653 Acquire() operation on _GL.
12655 The local object cache is now optional, and is disabled by default. Both
12656 AcpiExec and the iASL compiler enable the cache because they run in user
12657 mode and this enhances their performance. #define
12658 ACPI_ENABLE_OBJECT_CACHE
12659 to enable the local cache.
12661 Fixed an issue in the internal function AcpiUtEvaluateObject concerning
12663 optional "implicit return" support where an error was returned if no
12665 object was expected, but one was implicitly returned. AE_OK is now
12667 in this case and the implicitly returned object is deleted.
12668 AcpiUtEvaluateObject is only occasionally used, and only to execute
12670 methods such as _STA and _INI where the return type is known up front.
12672 Fixed a few issues with the internal convert-to-integer code. It now
12674 an error if an attempt is made to convert a null string, a string of only
12675 blanks/tabs, or a zero-length buffer. This affects both implicit
12677 and explicit conversion via the ToInteger() operator.
12679 The internal debug code in AcpiUtAcquireMutex has been commented out. It
12681 not needed for normal operation and should increase the performance of
12683 entire subsystem. The code remains in case it is needed for debug
12687 The AcpiExec source and makefile are included in the Unix/Linux package
12691 Code and Data Size: Current and previous core subsystem library sizes are
12692 shown below. These are the code and data sizes for the acpica.lib
12694 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12695 any ACPI driver or OSPM code. The debug version of the code includes the
12696 debug output trace mechanism and has a much larger code and data size.
12698 that these values will vary depending on the efficiency of the compiler
12700 the compiler options used during generation.
12703 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
12704 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
12706 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
12707 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
12709 2) iASL Compiler/Disassembler:
12711 Switch/Case support: A warning is now issued if the type of the Switch
12713 cannot be determined at compile time. For example, Switch(Arg0) will
12714 generate the warning, and the type is assumed to be an integer. As per
12716 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
12720 Switch/Case support: Implemented support for buffer and string objects as
12721 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
12722 buffers and strings.
12724 Switch/Case support: The emitted code for the LEqual() comparisons now
12726 the switch value as the first operand, not the second. The case value is
12728 the second operand, and this allows the case value to be implicitly
12729 converted to the type of the switch value, not the other way around.
12731 Switch/Case support: Temporary variables are now emitted immediately
12733 the control method, not at the global level. This means that there are
12735 36 temps available per-method, not 36 temps per-module as was the case
12737 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
12739 ----------------------------------------
12740 14 January 2005. Summary of changes for version 20050114:
12742 Added 2005 copyright to all module headers. This affects every module in
12743 the core subsystem, iASL compiler, and the utilities.
12745 1) ACPI CA Core Subsystem:
12747 Fixed an issue with the String-to-Buffer conversion code where the string
12748 null terminator was not included in the buffer after conversion, but
12750 is existing ASL that assumes the string null terminator is included. This
12752 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
12753 introduced in the previous version when the code was updated to correctly
12754 set the converted buffer size as per the ACPI specification. The ACPI
12756 is ambiguous and will be updated to specify that the null terminator must
12758 included in the converted buffer. This also affects the ToBuffer() ASL
12761 Fixed a problem with the Mid() ASL/AML operator where it did not work
12762 correctly on Buffer objects. Newly created sub-buffers were not being
12767 Fixed a problem in AcpiTbFindTable where incorrect string compares were
12768 performed on the OemId and OemTableId table header fields. These fields
12770 not null terminated, so strncmp is now used instead of strcmp.
12772 Implemented a restriction on the Store() ASL/AML operator to align the
12773 behavior with the ACPI specification. Previously, any object could be
12775 as the source operand. Now, the only objects that may be used are
12777 Buffers, Strings, Packages, Object References, and DDB Handles. If
12778 necessary, the original behavior can be restored by enabling the
12779 EnableInterpreterSlack flag.
12781 Enhanced the optional "implicit return" support to allow an implicit
12783 value from methods that are invoked externally via the AcpiEvaluateObject
12784 interface. This enables implicit returns from the _STA and _INI methods,
12787 Changed the Revision() ASL/AML operator to return the current version of
12789 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
12791 the supported ACPI version (This is the function of the _REV method).
12793 Updated the _REV predefined method to return the currently supported
12797 Implemented batch mode option for the AcpiExec utility (-b).
12799 Code and Data Size: Current and previous core subsystem library sizes are
12800 shown below. These are the code and data sizes for the acpica.lib
12802 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12803 any ACPI driver or OSPM code. The debug version of the code includes the
12804 debug output trace mechanism and has a much larger code and data size.
12806 that these values will vary depending on the efficiency of the compiler
12808 the compiler options used during generation.
12811 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12812 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
12814 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
12815 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
12817 ----------------------------------------
12818 10 December 2004. Summary of changes for version 20041210:
12820 ACPI 3.0 support is nearing completion in both the iASL compiler and the
12821 ACPI CA core subsystem.
12823 1) ACPI CA Core Subsystem:
12825 Fixed a problem in the ToDecimalString operator where the resulting
12827 length was incorrectly calculated. The length is now calculated exactly,
12828 eliminating incorrect AE_STRING_LIMIT exceptions.
12830 Fixed a problem in the ToHexString operator to allow a maximum 200
12832 string to be produced.
12834 Fixed a problem in the internal string-to-buffer and buffer-to-buffer
12836 routine where the length of the resulting buffer was not truncated to the
12837 new size (if the target buffer already existed).
12839 Code and Data Size: Current and previous core subsystem library sizes are
12840 shown below. These are the code and data sizes for the acpica.lib
12842 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12843 any ACPI driver or OSPM code. The debug version of the code includes the
12844 debug output trace mechanism and has a much larger code and data size.
12846 that these values will vary depending on the efficiency of the compiler
12848 the compiler options used during generation.
12851 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12852 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
12854 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12855 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
12858 2) iASL Compiler/Disassembler:
12860 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
12861 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
12862 Includes support in the disassembler.
12864 Implemented support for the new (ACPI 3.0) parameter to the Register
12868 Fixed a problem where the _HE resource name for the Interrupt macro was
12869 referencing bit 0 instead of bit 1.
12871 Implemented check for maximum 255 interrupts in the Interrupt macro.
12873 Fixed a problem with the predefined resource descriptor names where
12874 incorrect AML code was generated if the offset within the resource buffer
12875 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
12876 but did not update the surrounding package lengths.
12878 Changes to the Dma macro: All channels within the channel list must be
12880 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
12881 optional (default is BusMaster).
12883 Implemented check for maximum 7 data bytes for the VendorShort macro.
12885 The ReadWrite parameter is now optional for the Memory32 and similar
12888 ----------------------------------------
12889 03 December 2004. Summary of changes for version 20041203:
12891 1) ACPI CA Core Subsystem:
12893 The low-level field insertion/extraction code (exfldio) has been
12895 rewritten to eliminate unnecessary complexity, bugs, and boundary
12898 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
12900 operators where the input operand could be inadvertently deleted if no
12901 conversion was necessary (e.g., if the input to ToInteger was an Integer
12904 Fixed a problem with the ToDecimalString and ToHexString where an
12906 exception code was returned if the resulting string would be > 200 chars.
12907 AE_STRING_LIMIT is now returned.
12909 Fixed a problem with the Concatenate operator where AE_OK was always
12910 returned, even if the operation failed.
12912 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
12913 semaphores to be allocated.
12915 Code and Data Size: Current and previous core subsystem library sizes are
12916 shown below. These are the code and data sizes for the acpica.lib
12918 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12919 any ACPI driver or OSPM code. The debug version of the code includes the
12920 debug output trace mechanism and has a much larger code and data size.
12922 that these values will vary depending on the efficiency of the compiler
12924 the compiler options used during generation.
12927 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
12928 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
12930 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12931 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
12934 2) iASL Compiler/Disassembler:
12936 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
12937 recently introduced in 20041119.
12939 Fixed a problem with the ToUUID macro where the upper nybble of each
12941 byte was inadvertently set to zero.
12943 ----------------------------------------
12944 19 November 2004. Summary of changes for version 20041119:
12946 1) ACPI CA Core Subsystem:
12948 Fixed a problem in the internal ConvertToInteger routine where new
12950 were not truncated to 32 bits for 32-bit ACPI tables. This routine
12952 buffers and strings to integers.
12954 Implemented support to store a value to an Index() on a String object.
12956 is an ACPI 2.0 feature that had not yet been implemented.
12958 Implemented new behavior for storing objects to individual package
12960 (via the Index() operator). The previous behavior was to invoke the
12962 conversion rules if an object was already present at the index. The new
12963 behavior is to simply delete any existing object and directly store the
12965 object. Although the ACPI specification seems unclear on this subject,
12967 ACPI implementations behave in this manner. (This is the root of the
12968 AE_BAD_HEX_CONSTANT issue.)
12970 Modified the RSDP memory scan mechanism to support the extended checksum
12972 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
12973 RSDP signature is found with a valid checksum.
12975 Code and Data Size: Current and previous core subsystem library sizes are
12976 shown below. These are the code and data sizes for the acpica.lib
12978 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12979 any ACPI driver or OSPM code. The debug version of the code includes the
12980 debug output trace mechanism and has a much larger code and data size.
12982 that these values will vary depending on the efficiency of the compiler
12984 the compiler options used during generation.
12987 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
12988 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
12990 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
12991 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
12994 2) iASL Compiler/Disassembler:
12996 Fixed a missing semicolon in the aslcompiler.y file.
12998 ----------------------------------------
12999 05 November 2004. Summary of changes for version 20041105:
13001 1) ACPI CA Core Subsystem:
13003 Implemented support for FADT revision 2. This was an interim table
13005 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
13007 Implemented optional support to allow uninitialized LocalX and ArgX
13008 variables in a control method. The variables are initialized to an
13010 object with a value of zero. This support is enabled by setting the
13011 AcpiGbl_EnableInterpreterSlack flag to TRUE.
13013 Implemented support for Integer objects for the SizeOf operator. Either
13015 or 8 is returned, depending on the current integer size (32-bit or 64-
13017 depending on the parent table revision).
13019 Fixed a problem in the implementation of the SizeOf and ObjectType
13021 where the operand was resolved to a value too early, causing incorrect
13022 return values for some objects.
13024 Fixed some possible memory leaks during exceptional conditions.
13026 Code and Data Size: Current and previous core subsystem library sizes are
13027 shown below. These are the code and data sizes for the acpica.lib
13029 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13030 any ACPI driver or OSPM code. The debug version of the code includes the
13031 debug output trace mechanism and has a much larger code and data size.
13033 that these values will vary depending on the efficiency of the compiler
13035 the compiler options used during generation.
13038 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13039 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
13041 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13042 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13045 2) iASL Compiler/Disassembler:
13047 Implemented support for all ACPI 3.0 reserved names and methods.
13049 Implemented all ACPI 3.0 grammar elements in the front-end, including
13050 support for semicolons.
13052 Implemented the ACPI 3.0 Function() and ToUUID() macros
13054 Fixed a problem in the disassembler where a Scope() operator would not be
13055 emitted properly if the target of the scope was in another table.
13057 ----------------------------------------
13058 15 October 2004. Summary of changes for version 20041015:
13060 Note: ACPI CA is currently undergoing an in-depth and complete formal
13061 evaluation to test/verify the following areas. Other suggestions are
13062 welcome. This will result in an increase in the frequency of releases and
13063 the number of bug fixes in the next few months.
13064 - Functional tests for all ASL/AML operators
13065 - All implicit/explicit type conversions
13066 - Bit fields and operation regions
13067 - 64-bit math support and 32-bit-only "truncated" math support
13068 - Exceptional conditions, both compiler and interpreter
13069 - Dynamic object deletion and memory leaks
13070 - ACPI 3.0 support when implemented
13071 - External interfaces to the ACPI subsystem
13074 1) ACPI CA Core Subsystem:
13076 Fixed two alignment issues on 64-bit platforms - within debug statements
13078 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
13080 field within the non-aligned ACPI generic address structure.
13082 Fixed a problem in the Increment and Decrement operators where incorrect
13083 operand resolution could result in the inadvertent modification of the
13084 original integer when the integer is passed into another method as an
13085 argument and the arg is then incremented/decremented.
13087 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
13089 BCD number were truncated during conversion.
13091 Fixed a problem in the ToDecimal operator where the length of the
13093 string could be set incorrectly too long if the input operand was a
13097 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
13099 within a buffer would prematurely terminate a compare between buffer
13102 Added a check for string overflow (>200 characters as per the ACPI
13103 specification) during the Concatenate operator with two string operands.
13105 Code and Data Size: Current and previous core subsystem library sizes are
13106 shown below. These are the code and data sizes for the acpica.lib
13108 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13109 any ACPI driver or OSPM code. The debug version of the code includes the
13110 debug output trace mechanism and has a much larger code and data size.
13112 that these values will vary depending on the efficiency of the compiler
13114 the compiler options used during generation.
13117 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13118 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
13120 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13121 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
13125 2) iASL Compiler/Disassembler:
13127 Allow the use of the ObjectType operator on uninitialized Locals and Args
13128 (returns 0 as per the ACPI specification).
13130 Fixed a problem where the compiler would fault if there was a syntax
13132 in the FieldName of all of the various CreateXXXField operators.
13134 Disallow the use of lower case letters within the EISAID macro, as per
13136 ACPI specification. All EISAID strings must be of the form "UUUNNNN"
13138 U is an uppercase letter and N is a hex digit.
13141 ----------------------------------------
13142 06 October 2004. Summary of changes for version 20041006:
13144 1) ACPI CA Core Subsystem:
13146 Implemented support for the ACPI 3.0 Timer operator. This ASL function
13147 implements a 64-bit timer with 100 nanosecond granularity.
13149 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
13150 implement the ACPI 3.0 Timer operator. This allows the host OS to
13152 the timer with the best clock available. Also, it keeps the core
13154 out of the clock handling business, since the host OS (usually) performs
13157 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
13158 functions use a 64-bit address which is part of the packed ACPI Generic
13159 Address Structure. Since the structure is non-aligned, the alignment
13161 are now used to extract the address to a local variable before use.
13163 Fixed a problem where the ToInteger operator assumed all input strings
13165 hexadecimal. The operator now handles both decimal strings and hex
13167 (prefixed with "0x").
13169 Fixed a problem where the string length in the string object created as a
13170 result of the internal ConvertToString procedure could be incorrect. This
13171 potentially affected all implicit conversions and also the
13173 and ToHexString operators.
13175 Fixed two problems in the ToString operator. If the length parameter was
13176 zero, an incorrect string object was created and the value of the input
13177 length parameter was inadvertently changed from zero to Ones.
13179 Fixed a problem where the optional ResourceSource string in the
13181 resource macro was ignored.
13183 Simplified the interfaces to the internal division functions, reducing
13185 size and complexity.
13187 Code and Data Size: Current and previous core subsystem library sizes are
13188 shown below. These are the code and data sizes for the acpica.lib
13190 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13191 any ACPI driver or OSPM code. The debug version of the code includes the
13192 debug output trace mechanism and has a much larger code and data size.
13194 that these values will vary depending on the efficiency of the compiler
13196 the compiler options used during generation.
13199 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
13200 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
13202 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13203 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
13206 2) iASL Compiler/Disassembler:
13208 Implemented support for the ACPI 3.0 Timer operator.
13210 Fixed a problem where the Default() operator was inadvertently ignored in
13212 Switch/Case block. This was a problem in the translation of the Switch
13213 statement to If...Else pairs.
13215 Added support to allow a standalone Return operator, with no parentheses
13219 Fixed a problem with code generation for the ElseIf operator where the
13220 translated Else...If parse tree was improperly constructed leading to the
13223 ----------------------------------------
13224 22 September 2004. Summary of changes for version 20040922:
13226 1) ACPI CA Core Subsystem:
13228 Fixed a problem with the implementation of the LNot() operator where
13230 was not returned for the TRUE case. Changed the code to return Ones
13232 of (!Arg) which was usually 1. This change affects iASL constant folding
13234 this operator also.
13236 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was
13238 initialized properly -- Now zero the entire buffer in this case where the
13239 buffer already exists.
13241 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
13242 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
13243 related code considerably. This will require changes/updates to all OS
13244 interface layers (OSLs.)
13246 Implemented a new external interface, AcpiInstallExceptionHandler, to
13248 a system exception handler to be installed. This handler is invoked upon
13250 run-time exception that occurs during control method execution.
13252 Added support for the DSDT in AcpiTbFindTable. This allows the
13253 DataTableRegion() operator to access the local copy of the DSDT.
13255 Code and Data Size: Current and previous core subsystem library sizes are
13256 shown below. These are the code and data sizes for the acpica.lib
13258 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13259 any ACPI driver or OSPM code. The debug version of the code includes the
13260 debug output trace mechanism and has a much larger code and data size.
13262 that these values will vary depending on the efficiency of the compiler
13264 the compiler options used during generation.
13267 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
13268 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
13270 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
13271 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
13274 2) iASL Compiler/Disassembler:
13276 Fixed a problem with constant folding and the LNot operator. LNot was
13277 returning 1 in the TRUE case, not Ones as per the ACPI specification.
13279 could result in the generation of an incorrect folded/reduced constant.
13281 End-Of-File is now allowed within a "//"-style comment. A parse error no
13282 longer occurs if such a comment is at the very end of the input ASL
13286 Implemented the "-r" option to override the Revision in the table header.
13287 The initial use of this option will be to simplify the evaluation of the
13289 interpreter by allowing a single ASL source module to be compiled for
13291 32-bit or 64-bit integers.
13294 ----------------------------------------
13295 27 August 2004. Summary of changes for version 20040827:
13297 1) ACPI CA Core Subsystem:
13299 - Implemented support for implicit object conversion in the non-numeric
13300 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual,
13302 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
13303 the second operand is implicitly converted on the fly to match the type
13305 the first operand. For example:
13307 LEqual (Source1, Source2)
13309 Source1 and Source2 must each evaluate to an integer, a string, or a
13311 The data type of Source1 dictates the required type of Source2. Source2
13313 implicitly converted if necessary to match the type of Source1.
13315 - Updated and corrected the behavior of the string conversion support.
13317 rules concerning conversion of buffers to strings (according to the ACPI
13318 specification) are as follows:
13320 ToDecimalString - explicit byte-wise conversion of buffer to string of
13321 decimal values (0-255) separated by commas. ToHexString - explicit byte-
13323 conversion of buffer to string of hex values (0-FF) separated by commas.
13324 ToString - explicit byte-wise conversion of buffer to string. Byte-by-
13326 copy with no transform except NULL terminated. Any other implicit buffer-
13328 string conversion - byte-wise conversion of buffer to string of hex
13330 (0-FF) separated by spaces.
13332 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
13334 - Fixed a problem in AcpiNsGetPathnameLength where the returned length
13336 one byte too short in the case of a node in the root scope. This could
13337 cause a fault during debug output.
13339 - Code and Data Size: Current and previous core subsystem library sizes
13341 shown below. These are the code and data sizes for the acpica.lib
13343 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13344 any ACPI driver or OSPM code. The debug version of the code includes the
13345 debug output trace mechanism and has a much larger code and data size.
13347 that these values will vary depending on the efficiency of the compiler
13349 the compiler options used during generation.
13352 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
13353 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
13355 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
13356 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
13359 2) iASL Compiler/Disassembler:
13361 - Fixed a Linux generation error.
13364 ----------------------------------------
13365 16 August 2004. Summary of changes for version 20040816:
13367 1) ACPI CA Core Subsystem:
13369 Designed and implemented support within the AML interpreter for the so-
13370 called "implicit return". This support returns the result of the last
13372 operation within a control method, in the absence of an explicit Return()
13373 operator. A few machines depend on this behavior, even though it is not
13374 explicitly supported by the ASL language. It is optional support that
13376 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
13378 Removed support for the PCI_Config address space from the internal low
13380 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
13381 support was not used internally, and would not work correctly anyway
13383 the PCI bus number and segment number were not supported. There are
13384 separate interfaces for PCI configuration space access because of the
13388 Code and Data Size: Current and previous core subsystem library sizes are
13389 shown below. These are the code and data sizes for the acpica.lib
13391 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13392 any ACPI driver or OSPM code. The debug version of the code includes the
13393 debug output trace mechanism and has a much larger code and data size.
13395 that these values will vary depending on the efficiency of the compiler
13397 the compiler options used during generation.
13400 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13401 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
13403 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
13404 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
13407 2) iASL Compiler/Disassembler:
13409 Fixed a problem where constants in ASL expressions at the root level (not
13410 within a control method) could be inadvertently truncated during code
13411 generation. This problem was introduced in the 20040715 release.
13414 ----------------------------------------
13415 15 July 2004. Summary of changes for version 20040715:
13417 1) ACPI CA Core Subsystem:
13419 Restructured the internal HW GPE interfaces to pass/track the current
13421 of interrupts (enabled/disabled) in order to avoid possible deadlock and
13422 increase flexibility of the interfaces.
13424 Implemented a "lexicographical compare" for String and Buffer objects
13426 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual -
13428 as per further clarification to the ACPI specification. Behavior is
13430 to C library "strcmp".
13432 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
13433 external function. In the 32-bit non-debug case, the stack use has been
13434 reduced from 168 bytes to 32 bytes.
13436 Deployed a new run-time configuration flag,
13437 AcpiGbl_EnableInterpreterSlack,
13438 whose purpose is to allow the AML interpreter to forgive certain bad AML
13439 constructs. Default setting is FALSE.
13441 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field
13443 support code. If enabled, it allows field access to go beyond the end of
13445 region definition if the field is within the region length rounded up to
13447 next access width boundary (a common coding error.)
13449 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
13450 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also,
13452 symbols are lowercased by the latest version of the AcpiSrc tool.
13454 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
13455 rename "Register" to simply "Reg" to prevent certain compilers from
13458 Code and Data Size: Current and previous core subsystem library sizes are
13459 shown below. These are the code and data sizes for the acpica.lib
13461 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13462 any ACPI driver or OSPM code. The debug version of the code includes the
13463 debug output trace mechanism and has a much larger code and data size.
13465 that these values will vary depending on the efficiency of the compiler
13467 the compiler options used during generation.
13470 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13471 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
13473 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13474 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
13477 2) iASL Compiler/Disassembler:
13479 Implemented full support for Package objects within the Case() operator.
13480 Note: The Break() operator is currently not supported within Case blocks
13481 (TermLists) as there is some question about backward compatibility with
13486 Fixed a problem where complex terms were not supported properly within
13490 Eliminated extraneous warning for compiler-emitted reserved names of the
13491 form "_T_x". (Used in Switch/Case operators.)
13493 Eliminated optimization messages for "_T_x" objects and small constants
13494 within the DefinitionBlock operator.
13497 ----------------------------------------
13498 15 June 2004. Summary of changes for version 20040615:
13500 1) ACPI CA Core Subsystem:
13502 Implemented support for Buffer and String objects (as per ACPI 2.0) for
13504 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
13507 All directory names in the entire source package are lower case, as they
13508 were in earlier releases.
13510 Implemented "Disassemble" command in the AML debugger that will
13512 a single control method.
13514 Code and Data Size: Current and previous core subsystem library sizes are
13515 shown below. These are the code and data sizes for the acpica.lib
13517 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13518 any ACPI driver or OSPM code. The debug version of the code includes the
13519 debug output trace mechanism and has a much larger code and data size.
13521 that these values will vary depending on the efficiency of the compiler
13523 the compiler options used during generation.
13526 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
13527 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
13530 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13531 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
13534 2) iASL Compiler/Disassembler:
13536 Implemented support for Buffer and String objects (as per ACPI 2.0) for
13538 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
13541 All directory names in the entire source package are lower case, as they
13542 were in earlier releases.
13544 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
13547 Fixed an issue with the Windows version of the compiler where later
13549 of Windows place the FADT in the registry under the name "FADT" and not
13550 "FACP" as earlier versions did. This applies when using the -g or -
13551 d<nofilename> options. The compiler now looks for both strings as
13554 Fixed a problem with compiler namepath optimization where a namepath
13556 the Scope() operator could not be optimized if the namepath was a subpath
13558 the current scope path.
13560 ----------------------------------------
13561 27 May 2004. Summary of changes for version 20040527:
13563 1) ACPI CA Core Subsystem:
13565 Completed a new design and implementation for EBDA (Extended BIOS Data
13567 support in the RSDP scan code. The original code improperly scanned for
13569 EBDA by simply scanning from memory location 0 to 0x400. The correct
13571 is to first obtain the EBDA pointer from within the BIOS data area, then
13572 scan 1K of memory starting at the EBDA pointer. There appear to be few
13574 any machines that place the RSDP in the EBDA, however.
13576 Integrated a fix for a possible fault during evaluation of BufferField
13577 arguments. Obsolete code that was causing the problem was removed.
13579 Found and fixed a problem in the Field Support Code where data could be
13580 corrupted on a bit field read that starts on an aligned boundary but does
13581 not end on an aligned boundary. Merged the read/write "datum length"
13582 calculation code into a common procedure.
13584 Rolled in a couple of changes to the FreeBSD-specific header.
13587 Code and Data Size: Current and previous core subsystem library sizes are
13588 shown below. These are the code and data sizes for the acpica.lib
13590 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13591 any ACPI driver or OSPM code. The debug version of the code includes the
13592 debug output trace mechanism and has a much larger code and data size.
13594 that these values will vary depending on the efficiency of the compiler
13596 the compiler options used during generation.
13599 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13600 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
13602 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
13603 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
13606 2) iASL Compiler/Disassembler:
13608 Fixed a generation warning produced by some overly-verbose compilers for
13612 ----------------------------------------
13613 14 May 2004. Summary of changes for version 20040514:
13615 1) ACPI CA Core Subsystem:
13617 Fixed a problem where hardware GPE enable bits sometimes not set properly
13618 during and after GPE method execution. Result of 04/27 changes.
13620 Removed extra "clear all GPEs" when sleeping/waking.
13622 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
13623 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above
13625 the new AcpiEv* calls as appropriate.
13627 ACPI_OS_NAME was removed from the OS-specific headers. The default name
13629 now "Microsoft Windows NT" for maximum compatibility. However this can
13631 changed by modifying the acconfig.h file.
13633 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
13634 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
13636 Run _INI methods on ThermalZone objects. This is against the ACPI
13637 specification, but there is apparently ASL code in the field that has
13639 _INI methods, and apparently "other" AML interpreters execute them.
13641 Performed a full 16/32/64 bit lint that resulted in some small changes.
13643 Added a sleep simulation command to the AML debugger to test sleep code.
13645 Code and Data Size: Current and previous core subsystem library sizes are
13646 shown below. These are the code and data sizes for the acpica.lib
13648 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13649 any ACPI driver or OSPM code. The debug version of the code includes the
13650 debug output trace mechanism and has a much larger code and data size.
13652 that these values will vary depending on the efficiency of the compiler
13654 the compiler options used during generation.
13657 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13658 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
13660 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13661 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
13663 ----------------------------------------
13664 27 April 2004. Summary of changes for version 20040427:
13666 1) ACPI CA Core Subsystem:
13668 Completed a major overhaul of the GPE handling within ACPI CA. There are
13669 now three types of GPEs: wake-only, runtime-only, and combination
13671 The only GPEs allowed to be combination wake/run are for button-style
13672 devices such as a control-method power button, control-method sleep
13674 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are
13676 referenced by any _PRW methods are marked for "runtime" and hardware
13677 enabled. Any GPE that is referenced by a _PRW method is marked for
13679 (and disabled at runtime). However, at sleep time, only those GPEs that
13680 have been specifically enabled for wake via the AcpiEnableGpe interface
13682 actually be hardware enabled.
13684 A new external interface has been added, AcpiSetGpeType(), that is meant
13686 be used by device drivers to force a GPE to a particular type. It will
13688 especially useful for the drivers for the button devices mentioned above.
13690 Completed restructuring of the ACPI CA initialization sequence so that
13691 default operation region handlers are installed before GPEs are
13693 and the _PRW methods are executed. This will prevent errors when the
13695 methods attempt to access system memory or I/O space.
13697 GPE enable/disable no longer reads the GPE enable register. We now keep
13699 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
13700 thus no longer depend on the hardware to maintain these bits.
13702 Always clear the wake status and fixed/GPE status bits before sleep, even
13705 Improved the AML debugger output for displaying the GPE blocks and their
13708 Added new strings for the _OSI method, of the form "Windows 2001 SPx"
13712 Fixed a problem where the physical address was incorrectly calculated
13714 the Load() operator was used to directly load from an Operation Region
13716 loading from a Field object.) Also added check for minimum table length
13720 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
13723 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
13724 consistency with the other fields returned.
13726 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
13727 structure for each GPE in the system, so the size of this structure is
13730 CPU stack requirement reduction: Cleaned up the method execution and
13732 evaluation paths so that now a parameter structure is passed, instead of
13733 copying the various method parameters over and over again.
13735 In evregion.c: Correctly exit and reenter the interpreter region if and
13736 only if dispatching an operation region request to a user-installed
13738 Do not exit/reenter when dispatching to a default handler (e.g., default
13739 system memory or I/O handlers)
13742 Notes for updating drivers for the new GPE support. The following
13744 must be made to ACPI-related device drivers that are attached to one or
13746 GPEs: (This information will be added to the ACPI CA Programmer
13749 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you
13751 explicitly call AcpiEnableGpe.
13752 2) There is a new interface called AcpiSetGpeType. This should be called
13753 before enabling the GPE. Also, this interface will automatically disable
13754 the GPE if it is currently enabled.
13755 3) AcpiEnableGpe no longer supports a GPE type flag.
13757 Specific drivers that must be changed:
13759 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
13760 AeGpeHandler, NULL);
13761 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
13762 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
13764 2) Button Drivers (Power, Lid, Sleep):
13765 Run _PRW method under parent device
13766 If _PRW exists: /* This is a control-method button */
13767 Extract GPE number and possibly GpeDevice
13768 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
13769 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
13771 For all other devices that have _PRWs, we automatically set the GPE type
13773 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled.
13775 must be done on a selective basis, usually requiring some kind of user
13777 to allow the user to pick the wake devices.
13780 Code and Data Size: Current and previous core subsystem library sizes are
13781 shown below. These are the code and data sizes for the acpica.lib
13783 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13784 any ACPI driver or OSPM code. The debug version of the code includes the
13785 debug output trace mechanism and has a much larger code and data size.
13787 that these values will vary depending on the efficiency of the compiler
13789 the compiler options used during generation.
13792 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
13793 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
13796 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13797 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
13801 ----------------------------------------
13802 02 April 2004. Summary of changes for version 20040402:
13804 1) ACPI CA Core Subsystem:
13806 Fixed an interpreter problem where an indirect store through an ArgX
13807 parameter was incorrectly applying the "implicit conversion rules" during
13808 the store. From the ACPI specification: "If the target is a method local
13810 argument (LocalX or ArgX), no conversion is performed and the result is
13811 stored directly to the target". The new behavior is to disable implicit
13812 conversion during ALL stores to an ArgX.
13814 Changed the behavior of the _PRW method scan to ignore any and all errors
13815 returned by a given _PRW. This prevents the scan from aborting from the
13816 failure of any single _PRW.
13818 Moved the runtime configuration parameters from the global init procedure
13820 static variables in acglobal.h. This will allow the host to override the
13821 default values easily.
13823 Code and Data Size: Current and previous core subsystem library sizes are
13824 shown below. These are the code and data sizes for the acpica.lib
13826 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13827 any ACPI driver or OSPM code. The debug version of the code includes the
13828 debug output trace mechanism and has a much larger code and data size.
13830 that these values will vary depending on the efficiency of the compiler
13832 the compiler options used during generation.
13835 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
13836 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
13838 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
13839 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
13842 2) iASL Compiler/Disassembler:
13844 iASL now fully disassembles SSDTs. However, External() statements are
13846 generated automatically for unresolved symbols at this time. This is a
13847 planned feature for future implementation.
13849 Fixed a scoping problem in the disassembler that occurs when the type of
13851 target of a Scope() operator is overridden. This problem caused an
13852 incorrectly nested internal namespace to be constructed.
13854 Any warnings or errors that are emitted during disassembly are now
13856 out automatically so that the resulting file can be recompiled without
13860 ----------------------------------------
13861 26 March 2004. Summary of changes for version 20040326:
13863 1) ACPI CA Core Subsystem:
13865 Implemented support for "wake" GPEs via interaction between GPEs and the
13866 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
13867 identified as a WAKE GPE and by default will no longer be enabled at
13868 runtime. Previously, we were blindly enabling all GPEs with a
13870 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.
13872 believe this has been the cause of thousands of "spurious" GPEs on some
13875 This new GPE behavior is can be reverted to the original behavior (enable
13876 ALL GPEs at runtime) via a runtime flag.
13878 Fixed a problem where aliased control methods could not access objects
13879 properly. The proper scope within the namespace was not initialized
13880 (transferred to the target of the aliased method) before executing the
13883 Fixed a potential race condition on internal object deletion on the
13885 object in AcpiEvaluateObject.
13887 Integrated a fix for resource descriptors where both _MEM and _MTP were
13888 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
13889 wide, 0x0F instead of 0x03.)
13891 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName,
13894 fault in some cases.
13896 Updated Notify() values for debug statements in evmisc.c
13898 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
13900 Code and Data Size: Current and previous core subsystem library sizes are
13901 shown below. These are the code and data sizes for the acpica.lib
13903 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13904 any ACPI driver or OSPM code. The debug version of the code includes the
13905 debug output trace mechanism and has a much larger code and data size.
13907 that these values will vary depending on the efficiency of the compiler
13909 the compiler options used during generation.
13913 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
13914 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
13916 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
13917 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
13919 ----------------------------------------
13920 11 March 2004. Summary of changes for version 20040311:
13922 1) ACPI CA Core Subsystem:
13924 Fixed a problem where errors occurring during the parse phase of control
13925 method execution did not abort cleanly. For example, objects created and
13926 installed in the namespace were not deleted. This caused all subsequent
13927 invocations of the method to return the AE_ALREADY_EXISTS exception.
13929 Implemented a mechanism to force a control method to "Serialized"
13931 if the method attempts to create namespace objects. (The root of the
13932 AE_ALREADY_EXISTS problem.)
13934 Implemented support for the predefined _OSI "internal" control method.
13935 Initial supported strings are "Linux", "Windows 2000", "Windows 2001",
13937 "Windows 2001.1", and can be easily upgraded for new strings as
13939 This feature will allow "other" operating systems to execute the fully
13940 tested, "Windows" code path through the ASL code
13942 Global Lock Support: Now allows multiple acquires and releases with any
13943 internal thread. Removed concept of "owning thread" for this special
13946 Fixed two functions that were inappropriately declaring large objects on
13948 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage
13950 method execution considerably.
13952 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
13953 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
13955 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
13956 defined on the machine.
13958 Implemented two runtime options: One to force all control method
13960 to "Serialized" to mimic Windows behavior, another to disable _OSI
13962 if it causes problems on a given machine.
13964 Code and Data Size: Current and previous core subsystem library sizes are
13965 shown below. These are the code and data sizes for the acpica.lib
13967 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13968 any ACPI driver or OSPM code. The debug version of the code includes the
13969 debug output trace mechanism and has a much larger code and data size.
13971 that these values will vary depending on the efficiency of the compiler
13973 the compiler options used during generation.
13976 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
13977 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
13979 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
13980 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
13982 2) iASL Compiler/Disassembler:
13984 Fixed an array size problem for FreeBSD that would cause the compiler to
13987 ----------------------------------------
13988 20 February 2004. Summary of changes for version 20040220:
13991 1) ACPI CA Core Subsystem:
13993 Implemented execution of _SxD methods for Device objects in the
13994 GetObjectInfo interface.
13996 Fixed calls to _SST method to pass the correct arguments.
13998 Added a call to _SST on wake to restore to "working" state.
14000 Check for End-Of-Buffer failure case in the WalkResources interface.
14002 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
14003 structures to the beginning of the file.
14005 After wake, clear GPE status register(s) before enabling GPEs.
14007 After wake, clear/enable power button. (Perhaps we should clear/enable
14009 fixed events upon wake.)
14011 Fixed a couple of possible memory leaks in the Namespace manager.
14013 Integrated latest acnetbsd.h file.
14015 ----------------------------------------
14016 11 February 2004. Summary of changes for version 20040211:
14019 1) ACPI CA Core Subsystem:
14021 Completed investigation and implementation of the call-by-reference
14022 mechanism for control method arguments.
14024 Fixed a problem where a store of an object into an indexed package could
14025 fail if the store occurs within a different method than the method that
14026 created the package.
14028 Fixed a problem where the ToDecimal operator could return incorrect
14031 Fixed a problem where the CopyObject operator could fail on some of the
14033 obscure objects (e.g., Reference objects.)
14035 Improved the output of the Debug object to display buffer, package, and
14038 Fixed a problem where constructs of the form "RefOf (ArgX)" did not
14040 the expected result.
14042 Added permanent ACPI_REPORT_ERROR macros for all instances of the
14043 ACPI_AML_INTERNAL exception.
14045 Integrated latest version of acfreebsd.h
14047 ----------------------------------------
14048 16 January 2004. Summary of changes for version 20040116:
14050 The purpose of this release is primarily to update the copyright years in
14051 each module, thus causing a huge number of diffs. There are a few small
14052 functional changes, however.
14054 1) ACPI CA Core Subsystem:
14056 Improved error messages when there is a problem finding one or more of
14058 required base ACPI tables
14060 Reintroduced the definition of APIC_HEADER in actbl.h
14062 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
14064 Removed extraneous reference to NewObj in dsmthdat.c
14068 Fixed a problem introduced in December that disabled the correct
14070 of Resource Templates
14073 ----------------------------------------
14074 03 December 2003. Summary of changes for version 20031203:
14076 1) ACPI CA Core Subsystem:
14078 Changed the initialization of Operation Regions during subsystem
14079 init to perform two entire walks of the ACPI namespace; The first
14080 to initialize the regions themselves, the second to execute the
14081 _REG methods. This fixed some interdependencies across _REG
14082 methods found on some machines.
14084 Fixed a problem where a Store(Local0, Local1) could simply update
14085 the object reference count, and not create a new copy of the
14086 object if the Local1 is uninitialized.
14088 Implemented support for the _SST reserved method during sleep
14091 Implemented support to clear the SLP_TYP and SLP_EN bits when
14092 waking up, this is apparently required by some machines.
14094 When sleeping, clear the wake status only if SleepState is not S5.
14096 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
14097 pointer arithmetic advanced a string pointer too far.
14099 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
14100 could be returned if the requested table has not been loaded.
14102 Within the support for IRQ resources, restructured the handling of
14103 the active and edge/level bits.
14105 Fixed a few problems in AcpiPsxExecute() where memory could be
14106 leaked under certain error conditions.
14108 Improved error messages for the cases where the ACPI mode could
14111 Code and Data Size: Current and previous core subsystem library
14112 sizes are shown below. These are the code and data sizes for the
14113 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14114 these values do not include any ACPI driver or OSPM code. The
14115 debug version of the code includes the debug output trace
14116 mechanism and has a much larger code and data size. Note that
14117 these values will vary depending on the efficiency of the compiler
14118 and the compiler options used during generation.
14120 Previous Release (20031029):
14121 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
14122 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
14124 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
14125 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
14127 2) iASL Compiler/Disassembler:
14129 Implemented a fix for the iASL disassembler where a bad index was
14130 generated. This was most noticeable on 64-bit platforms
14133 ----------------------------------------
14134 29 October 2003. Summary of changes for version 20031029:
14136 1) ACPI CA Core Subsystem:
14139 Fixed a problem where a level-triggered GPE with an associated
14140 _Lxx control method was incorrectly cleared twice.
14142 Fixed a problem with the Field support code where an access can
14143 occur beyond the end-of-region if the field is non-aligned but
14144 extends to the very end of the parent region (resulted in an
14145 AE_AML_REGION_LIMIT exception.)
14147 Fixed a problem with ACPI Fixed Events where an RT Clock handler
14148 would not get invoked on an RTC event. The RTC event bitmasks for
14149 the PM1 registers were not being initialized properly.
14151 Implemented support for executing _STA and _INI methods for
14152 Processor objects. Although this is currently not part of the
14153 ACPI specification, there is existing ASL code that depends on the
14154 init-time execution of these methods.
14156 Implemented and deployed a GetDescriptorName function to decode
14157 the various types of internal descriptors. Guards against null
14158 descriptors during debug output also.
14160 Implemented and deployed a GetNodeName function to extract the 4-
14161 character namespace node name. This function simplifies the debug
14162 and error output, as well as guarding against null pointers during
14165 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
14166 simplify the debug and error output of 64-bit integers. This
14167 macro replaces the HIDWORD and LODWORD macros for dumping these
14170 Updated the implementation of the Stall() operator to only call
14171 AcpiOsStall(), and also return an error if the operand is larger
14172 than 255. This preserves the required behavior of not
14173 relinquishing the processor, as would happen if AcpiOsSleep() was
14174 called for "long stalls".
14176 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
14177 initialized are now treated as NOOPs.
14179 Cleaned up a handful of warnings during 64-bit generation.
14181 Fixed a reported error where and incorrect GPE number was passed
14182 to the GPE dispatch handler. This value is only used for error
14183 output, however. Used this opportunity to clean up and streamline
14184 the GPE dispatch code.
14186 Code and Data Size: Current and previous core subsystem library
14187 sizes are shown below. These are the code and data sizes for the
14188 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14189 these values do not include any ACPI driver or OSPM code. The
14191 debug version of the code includes the debug output trace
14192 mechanism and has a much larger code and data size. Note that
14193 these values will vary depending on the efficiency of the compiler
14194 and the compiler options used during generation.
14196 Previous Release (20031002):
14197 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
14198 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
14200 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
14201 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
14204 2) iASL Compiler/Disassembler:
14206 Updated the iASL compiler to return an error if the operand to the
14207 Stall() operator is larger than 255.
14210 ----------------------------------------
14211 02 October 2003. Summary of changes for version 20031002:
14214 1) ACPI CA Core Subsystem:
14216 Fixed a problem with Index Fields where the index was not
14217 incremented for fields that require multiple writes to the
14218 index/data registers (Fields that are wider than the data
14221 Fixed a problem with all Field objects where a write could go
14222 beyond the end-of-field if the field was larger than the access
14223 granularity and therefore required multiple writes to complete the
14224 request. An extra write beyond the end of the field could happen
14227 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
14228 would incorrectly be returned if the width of the Data Register
14229 was larger than the specified field access width.
14231 Completed fixes for LoadTable() and Unload() and verified their
14232 operation. Implemented full support for the "DdbHandle" object
14233 throughout the ACPI CA subsystem.
14235 Implemented full support for the MADT and ECDT tables in the ACPI
14236 CA header files. Even though these tables are not directly
14237 consumed by ACPI CA, the header definitions are useful for ACPI
14240 Integrated resource descriptor fixes posted to the Linux ACPI
14241 list. This included checks for minimum descriptor length, and
14242 support for trailing NULL strings within descriptors that have
14243 optional string elements.
14245 Code and Data Size: Current and previous core subsystem library
14246 sizes are shown below. These are the code and data sizes for the
14247 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14248 these values do not include any ACPI driver or OSPM code. The
14249 debug version of the code includes the debug output trace
14250 mechanism and has a much larger code and data size. Note that
14251 these values will vary depending on the efficiency of the compiler
14252 and the compiler options used during generation.
14254 Previous Release (20030918):
14255 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
14256 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
14258 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
14259 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
14264 Implemented detection of non-ASCII characters within the input
14265 source ASL file. This catches attempts to compile binary (AML)
14266 files early in the compile, with an informative error message.
14268 Fixed a problem where the disassembler would fault if the output
14269 filename could not be generated or if the output file could not be
14272 ----------------------------------------
14273 18 September 2003. Summary of changes for version 20030918:
14276 1) ACPI CA Core Subsystem:
14278 Found and fixed a longstanding problem with the late execution of
14279 the various deferred AML opcodes (such as Operation Regions,
14280 Buffer Fields, Buffers, and Packages). If the name string
14281 specified for the name of the new object placed the object in a
14282 scope other than the current scope, the initialization/execution
14283 of the opcode failed. The solution to this problem was to
14284 implement a mechanism where the late execution of such opcodes
14285 does not attempt to lookup/create the name a second time in an
14286 incorrect scope. This fixes the "region size computed
14287 incorrectly" problem.
14289 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
14290 Global Lock AE_BAD_PARAMETER error.
14292 Fixed several 64-bit issues with prototypes, casting and data
14295 Removed duplicate prototype from acdisasm.h
14297 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
14299 Code and Data Size: Current and previous core subsystem library
14300 sizes are shown below. These are the code and data sizes for the
14301 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14302 these values do not include any ACPI driver or OSPM code. The
14303 debug version of the code includes the debug output trace
14304 mechanism and has a much larger code and data size. Note that
14305 these values will vary depending on the efficiency of the compiler
14306 and the compiler options used during generation.
14310 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
14311 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
14313 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
14314 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
14319 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
14320 correct sleep time in seconds.
14322 ----------------------------------------
14323 14 July 2003. Summary of changes for version 20030619:
14325 1) ACPI CA Core Subsystem:
14327 Parse SSDTs in order discovered, as opposed to reverse order
14330 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
14337 Dynamically allocate SDT list (suggested by Andi Kleen)
14339 proc function return value cleanups (Andi Kleen)
14341 Correctly handle NMI watchdog during long stalls (Andrew Morton)
14343 Make it so acpismp=force works (reported by Andrew Morton)
14346 ----------------------------------------
14347 19 June 2003. Summary of changes for version 20030619:
14349 1) ACPI CA Core Subsystem:
14351 Fix To/FromBCD, eliminating the need for an arch-specific #define.
14353 Do not acquire a semaphore in the S5 shutdown path.
14355 Fix ex_digits_needed for 0. (Takayoshi Kochi)
14357 Fix sleep/stall code reversal. (Andi Kleen)
14359 Revert a change having to do with control method calling
14364 acpiphp update (Takayoshi Kochi)
14366 Export acpi_disabled for sonypi (Stelian Pop)
14368 Mention acpismp=force in config help
14370 Re-add acpitable.c and acpismp=force. This improves backwards
14372 compatibility and also cleans up the code to a significant degree.
14374 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
14376 ----------------------------------------
14377 22 May 2003. Summary of changes for version 20030522:
14379 1) ACPI CA Core Subsystem:
14381 Found and fixed a reported problem where an AE_NOT_FOUND error
14382 occurred occasionally during _BST evaluation. This turned out to
14383 be an Owner ID allocation issue where a called method did not get
14384 a new ID assigned to it. Eventually, (after 64k calls), the Owner
14385 ID UINT16 would wraparound so that the ID would be the same as the
14386 caller's and the called method would delete the caller's
14389 Implemented extended error reporting for control methods that are
14390 aborted due to a run-time exception. Output includes the exact
14391 AML instruction that caused the method abort, a dump of the method
14392 locals and arguments at the time of the abort, and a trace of all
14393 nested control method calls.
14395 Modified the interpreter to allow the creation of buffers of zero
14396 length from the AML code. Implemented new code to ensure that no
14397 attempt is made to actually allocate a memory buffer (of length
14398 zero) - instead, a simple buffer object with a NULL buffer pointer
14399 and length zero is created. A warning is no longer issued when
14400 the AML attempts to create a zero-length buffer.
14402 Implemented a workaround for the "leading asterisk issue" in
14403 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
14404 asterisk is automatically removed if present in any HID, UID, or
14405 CID strings. The iASL compiler will still flag this asterisk as
14408 Implemented full support for _CID methods that return a package of
14409 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
14410 now additionally returns a device _CID list if present. This
14411 required a change to the external interface in order to pass an
14412 ACPI_BUFFER object as a parameter since the _CID list is of
14415 Fixed a problem with the new AE_SAME_HANDLER exception where
14416 handler initialization code did not know about this exception.
14418 Code and Data Size: Current and previous core subsystem library
14419 sizes are shown below. These are the code and data sizes for the
14420 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14421 these values do not include any ACPI driver or OSPM code. The
14422 debug version of the code includes the debug output trace
14423 mechanism and has a much larger code and data size. Note that
14424 these values will vary depending on the efficiency of the compiler
14425 and the compiler options used during generation.
14427 Previous Release (20030509):
14428 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
14429 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
14431 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
14432 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
14437 Fixed a bug in which we would reinitialize the ACPI interrupt
14438 after it was already working, thus disabling all ACPI and the IRQs
14439 for any other device sharing the interrupt. (Thanks to Stian
14442 Toshiba driver update (John Belmonte)
14444 Return only 0 or 1 for our interrupt handler status (Andrew
14450 Fixed a reported problem where multiple (nested) ElseIf()
14451 statements were not handled correctly by the compiler, resulting
14452 in incorrect warnings and incorrect AML code. This was a problem
14453 in both the ASL parser and the code generator.
14458 Added changes to existing interfaces, new exception codes, and new
14459 text concerning reference count object management versus garbage
14462 ----------------------------------------
14463 09 May 2003. Summary of changes for version 20030509.
14466 1) ACPI CA Core Subsystem:
14468 Changed the subsystem initialization sequence to hold off
14469 installation of address space handlers until the hardware has been
14470 initialized and the system has entered ACPI mode. This is because
14471 the installation of space handlers can cause _REG methods to be
14472 run. Previously, the _REG methods could potentially be run before
14473 ACPI mode was enabled.
14475 Fixed some memory leak issues related to address space handler and
14476 notify handler installation. There were some problems with the
14477 reference count mechanism caused by the fact that the handler
14478 objects are shared across several namespace objects.
14480 Fixed a reported problem where reference counts within the
14481 namespace were not properly updated when named objects created by
14482 method execution were deleted.
14484 Fixed a reported problem where multiple SSDTs caused a deletion
14485 issue during subsystem termination. Restructured the table data
14486 structures to simplify the linked lists and the related code.
14488 Fixed a problem where the table ID associated with secondary
14489 tables (SSDTs) was not being propagated into the namespace objects
14490 created by those tables. This would only present a problem for
14491 tables that are unloaded at run-time, however.
14493 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
14494 type as the length parameter (instead of UINT32).
14496 Solved a long-standing problem where an ALREADY_EXISTS error
14497 appears on various systems. This problem could happen when there
14498 are multiple PCI_Config operation regions under a single PCI root
14499 bus. This doesn't happen very frequently, but there are some
14500 systems that do this in the ASL.
14502 Fixed a reported problem where the internal DeleteNode function
14503 was incorrectly handling the case where a namespace node was the
14504 first in the parent's child list, and had additional peers (not
14505 the only child, but first in the list of children.)
14507 Code and Data Size: Current core subsystem library sizes are shown
14508 below. These are the code and data sizes for the acpica.lib
14509 produced by the Microsoft Visual C++ 6.0 compiler, and these
14510 values do not include any ACPI driver or OSPM code. The debug
14511 version of the code includes the debug output trace mechanism and
14512 has a much larger code and data size. Note that these values will
14513 vary depending on the efficiency of the compiler and the compiler
14514 options used during generation.
14517 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
14518 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
14520 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
14521 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
14526 Allow ":" in OS override string (Ducrot Bruno)
14528 Kobject fix (Greg KH)
14531 3 iASL Compiler/Disassembler:
14533 Fixed a problem in the generation of the C source code files (AML
14534 is emitted in C source statements for BIOS inclusion) where the
14535 Ascii dump that appears within a C comment at the end of each line
14536 could cause a compile time error if the AML sequence happens to
14537 have an open comment or close comment sequence embedded.
14540 ----------------------------------------
14541 24 April 2003. Summary of changes for version 20030424.
14544 1) ACPI CA Core Subsystem:
14546 Support for big-endian systems has been implemented. Most of the
14547 support has been invisibly added behind big-endian versions of the
14548 ACPI_MOVE_* macros.
14550 Fixed a problem in AcpiHwDisableGpeBlock() and
14551 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
14552 low level hardware write routine. The offset parameter was
14553 actually eliminated from the low level read/write routines because
14554 they had become obsolete.
14556 Fixed a problem where a handler object was deleted twice during
14557 the removal of a fixed event handler.
14562 A fix for SMP systems with link devices was contributed by
14566 (2.5) Return whether we handled the interrupt in our IRQ handler.
14567 (Linux ISRs no longer return void, so we can propagate the handler
14568 return value from the ACPI CA core back to the OS.)
14574 The ACPI CA Programmer Reference has been updated to reflect new
14575 interfaces and changes to existing interfaces.
14577 ----------------------------------------
14578 28 March 2003. Summary of changes for version 20030328.
14580 1) ACPI CA Core Subsystem:
14582 The GPE Block Device support has been completed. New interfaces
14583 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
14584 interfaces (enable, disable, clear, getstatus) have been split
14585 into separate interfaces for Fixed Events and General Purpose
14586 Events (GPEs) in order to support GPE Block Devices properly.
14588 Fixed a problem where the error message "Failed to acquire
14589 semaphore" would appear during operations on the embedded
14592 Code and Data Size: Current core subsystem library sizes are shown
14593 below. These are the code and data sizes for the acpica.lib
14594 produced by the Microsoft Visual C++ 6.0 compiler, and these
14595 values do not include any ACPI driver or OSPM code. The debug
14596 version of the code includes the debug output trace mechanism and
14597 has a much larger code and data size. Note that these values will
14598 vary depending on the efficiency of the compiler and the compiler
14599 options used during generation.
14602 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
14603 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
14605 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
14606 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
14609 ----------------------------------------
14610 28 February 2003. Summary of changes for version 20030228.
14613 1) ACPI CA Core Subsystem:
14615 The GPE handling and dispatch code has been completely overhauled
14616 in preparation for support of GPE Block Devices (ID ACPI0006).
14617 This affects internal data structures and code only; there should
14618 be no differences visible externally. One new file has been
14621 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
14622 fields that are used to determine the GPE block lengths. The
14623 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
14624 structures are ignored. This is per the ACPI specification but it
14625 isn't very clear. The full 256 Block 0/1 GPEs are now supported
14626 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
14628 In the SCI interrupt handler, removed the read of the PM1_CONTROL
14629 register to look at the SCI_EN bit. On some machines, this read
14630 causes an SMI event and greatly slows down SCI events. (This may
14631 in fact be the cause of slow battery status response on some
14634 Fixed a problem where a store of a NULL string to a package object
14635 could cause the premature deletion of the object. This was seen
14636 during execution of the battery _BIF method on some systems,
14637 resulting in no battery data being returned.
14639 Added AcpiWalkResources interface to simplify parsing of resource
14642 Code and Data Size: Current core subsystem library sizes are shown
14643 below. These are the code and data sizes for the acpica.lib
14644 produced by the Microsoft Visual C++ 6.0 compiler, and these
14645 values do not include any ACPI driver or OSPM code. The debug
14646 version of the code includes the debug output trace mechanism and
14647 has a much larger code and data size. Note that these values will
14648 vary depending on the efficiency of the compiler and the compiler
14649 options used during generation.
14652 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
14653 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
14655 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
14656 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
14661 S3 fixes (Ole Rohne)
14663 Update ACPI PHP driver with to use new acpi_walk_resource API
14666 Add S4BIOS support (Pavel Machek)
14668 Map in entire table before performing checksum (John Stultz)
14670 Expand the mem= cmdline to allow the specification of reserved and
14671 ACPI DATA blocks (Pavel Machek)
14673 Never use ACPI on VISWS
14675 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
14677 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
14678 causing us to think that some systems support C2 when they really
14681 Do not count processor objects for non-present CPUs (Thanks to
14687 Fixed a problem where ASL include files could not be found and
14690 Added support for the _PDC reserved name.
14693 ----------------------------------------
14694 22 January 2003. Summary of changes for version 20030122.
14697 1) ACPI CA Core Subsystem:
14699 Added a check for constructs of the form: Store (Local0, Local0)
14700 where Local0 is not initialized. Apparently, some BIOS
14701 programmers believe that this is a NOOP. Since this store doesn't
14702 do anything anyway, the new prototype behavior will ignore this
14703 error. This is a case where we can relax the strict checking in
14704 the interpreter in the name of compatibility.
14709 The AcpiSrc Source Conversion Utility has been released with the
14710 Linux package for the first time. This is the utility that is
14711 used to convert the ACPI CA base source code to the Linux version.
14713 (Both) Handle P_BLK lengths shorter than 6 more gracefully
14715 (Both) Move more headers to include/acpi, and delete an unused
14718 (Both) Move drivers/acpi/include directory to include/acpi
14720 (Both) Boot functions don't use cmdline, so don't pass it around
14722 (Both) Remove include of unused header (Adrian Bunk)
14724 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
14726 former now also includes the latter, acpiphp.h only needs the one,
14729 (2.5) Make it possible to select method of bios restoring after S3
14730 resume. [=> no more ugly ifdefs] (Pavel Machek)
14732 (2.5) Make proc write interfaces work (Pavel Machek)
14734 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
14736 (2.5) Break out ACPI Perf code into its own module, under cpufreq
14737 (Dominik Brodowski)
14739 (2.4) S4BIOS support (Ducrot Bruno)
14741 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
14747 Added support to disassemble SSDT and PSDTs.
14749 Implemented support to obtain SSDTs from the Windows registry if
14753 ----------------------------------------
14754 09 January 2003. Summary of changes for version 20030109.
14756 1) ACPI CA Core Subsystem:
14758 Changed the behavior of the internal Buffer-to-String conversion
14759 function. The current ACPI specification states that the contents
14760 of the buffer are "converted to a string of two-character
14761 hexadecimal numbers, each separated by a space". Unfortunately,
14762 this definition is not backwards compatible with existing ACPI 1.0
14763 implementations (although the behavior was not defined in the ACPI
14764 1.0 specification). The new behavior simply copies data from the
14765 buffer to the string until a null character is found or the end of
14766 the buffer is reached. The new String object is always null
14767 terminated. This problem was seen during the generation of _BIF
14768 battery data where incorrect strings were returned for battery
14769 type, etc. This will also require an errata to the ACPI
14772 Renamed all instances of NATIVE_UINT and NATIVE_INT to
14773 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
14775 Copyright in all module headers (both Linux and non-Linux) has be
14778 Code and Data Size: Current core subsystem library sizes are shown
14779 below. These are the code and data sizes for the acpica.lib
14780 produced by the Microsoft Visual C++ 6.0 compiler, and these
14781 values do not include any ACPI driver or OSPM code. The debug
14782 version of the code includes the debug output trace mechanism and
14783 has a much larger code and data size. Note that these values will
14784 vary depending on the efficiency of the compiler and the compiler
14785 options used during generation.
14788 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
14789 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
14791 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
14792 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
14797 Fixed an oops on module insertion/removal (Matthew Tippett)
14799 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
14801 (2.5) Replace pr_debug (Randy Dunlap)
14803 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
14805 (Both) Eliminate spawning of thread from timer callback, in favor
14808 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
14810 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
14812 (Both) Add missing statics to button.c (Pavel Machek)
14814 Several changes have been made to the source code translation
14815 utility that generates the Linux Code in order to make the code
14818 All typedefs on structs and unions have been removed in keeping
14819 with the Linux coding style.
14821 Removed the non-Linux SourceSafe module revision number from each
14824 Completed major overhaul of symbols to be lowercased for linux.
14825 Doubled the number of symbols that are lowercased.
14827 Fixed a problem where identifiers within procedure headers and
14828 within quotes were not fully lower cased (they were left with a
14831 Some C macros whose only purpose is to allow the generation of 16-
14832 bit code are now completely removed in the Linux code, increasing
14833 readability and maintainability.
14835 ----------------------------------------
14837 12 December 2002. Summary of changes for version 20021212.
14840 1) ACPI CA Core Subsystem:
14842 Fixed a problem where the creation of a zero-length AML Buffer
14843 would cause a fault.
14845 Fixed a problem where a Buffer object that pointed to a static AML
14846 buffer (in an ACPI table) could inadvertently be deleted, causing
14849 Fixed a problem where a user buffer (passed in to the external
14850 ACPI CA interfaces) could be overwritten if the buffer was too
14851 small to complete the operation, causing memory corruption.
14853 Fixed a problem in the Buffer-to-String conversion code where a
14854 string of length one was always returned, regardless of the size
14855 of the input Buffer object.
14857 Removed the NATIVE_CHAR data type across the entire source due to
14858 lack of need and lack of consistent use.
14860 Code and Data Size: Current core subsystem library sizes are shown
14861 below. These are the code and data sizes for the acpica.lib
14862 produced by the Microsoft Visual C++ 6.0 compiler, and these
14863 values do not include any ACPI driver or OSPM code. The debug
14864 version of the code includes the debug output trace mechanism and
14865 has a much larger code and data size. Note that these values will
14866 vary depending on the efficiency of the compiler and the compiler
14867 options used during generation.
14870 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
14871 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
14873 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
14874 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
14877 ----------------------------------------
14878 05 December 2002. Summary of changes for version 20021205.
14880 1) ACPI CA Core Subsystem:
14882 Fixed a problem where a store to a String or Buffer object could
14883 cause corruption of the DSDT if the object type being stored was
14884 the same as the target object type and the length of the object
14885 being stored was equal to or smaller than the original (existing)
14886 target object. This was seen to cause corruption of battery _BIF
14887 buffers if the _BIF method modified the buffer on the fly.
14889 Fixed a problem where an internal error was generated if a control
14890 method invocation was used in an OperationRegion, Buffer, or
14891 Package declaration. This was caused by the deferred parsing of
14892 the control method and thus the deferred creation of the internal
14893 method object. The solution to this problem was to create the
14894 internal method object at the moment the method is encountered in
14895 the first pass - so that subsequent references to the method will
14896 able to obtain the required parameter count and thus properly
14897 parse the method invocation. This problem presented itself as an
14898 AE_AML_INTERNAL during the pass 1 parse phase during table load.
14900 Fixed a problem where the internal String object copy routine did
14901 not always allocate sufficient memory for the target String object
14902 and caused memory corruption. This problem was seen to cause
14903 "Allocation already present in list!" errors as memory allocation
14906 Implemented a new function for the evaluation of namespace objects
14907 that allows the specification of the allowable return object
14908 types. This simplifies a lot of code that checks for a return
14909 object of one or more specific objects returned from the
14910 evaluation (such as _STA, etc.) This may become and external
14911 function if it would be useful to ACPI-related drivers.
14913 Completed another round of prefixing #defines with "ACPI_" for
14916 Completed additional code restructuring to allow more modular
14917 linking for iASL compiler and AcpiExec. Several files were split
14918 creating new files. New files: nsparse.c dsinit.c evgpe.c
14920 Implemented an abort mechanism to terminate an executing control
14921 method via the AML debugger. This feature is useful for debugging
14922 control methods that depend (wait) for specific hardware
14925 Code and Data Size: Current core subsystem library sizes are shown
14926 below. These are the code and data sizes for the acpica.lib
14927 produced by the Microsoft Visual C++ 6.0 compiler, and these
14928 values do not include any ACPI driver or OSPM code. The debug
14929 version of the code includes the debug output trace mechanism and
14930 has a much larger code and data size. Note that these values will
14931 vary depending on the efficiency of the compiler and the compiler
14932 options used during generation.
14935 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
14936 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
14938 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
14939 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
14942 2) iASL Compiler/Disassembler
14944 Fixed a compiler code generation problem for "Interrupt" Resource
14945 Descriptors. If specified in the ASL, the optional "Resource
14946 Source Index" and "Resource Source" fields were not inserted into
14947 the correct location within the AML resource descriptor, creating
14948 an invalid descriptor.
14950 Fixed a disassembler problem for "Interrupt" resource descriptors.
14951 The optional "Resource Source Index" and "Resource Source" fields
14955 ----------------------------------------
14956 22 November 2002. Summary of changes for version 20021122.
14959 1) ACPI CA Core Subsystem:
14961 Fixed a reported problem where an object stored to a Method Local
14962 or Arg was not copied to a new object during the store - the
14963 object pointer was simply copied to the Local/Arg. This caused
14964 all subsequent operations on the Local/Arg to also affect the
14965 original source of the store operation.
14967 Fixed a problem where a store operation to a Method Local or Arg
14968 was not completed properly if the Local/Arg contained a reference
14969 (from RefOf) to a named field. The general-purpose store-to-
14970 namespace-node code is now used so that this case is handled
14973 Fixed a problem where the internal object copy routine would cause
14974 a protection fault if the object being copied was a Package and
14975 contained either 1) a NULL package element or 2) a nested sub-
14978 Fixed a problem with the GPE initialization that resulted from an
14979 ambiguity in the ACPI specification. One section of the
14980 specification states that both the address and length of the GPE
14981 block must be zero if the block is not supported. Another section
14982 implies that only the address need be zero if the block is not
14983 supported. The code has been changed so that both the address and
14984 the length must be non-zero to indicate a valid GPE block (i.e.,
14985 if either the address or the length is zero, the GPE block is
14988 Code and Data Size: Current core subsystem library sizes are shown
14989 below. These are the code and data sizes for the acpica.lib
14990 produced by the Microsoft Visual C++ 6.0 compiler, and these
14991 values do not include any ACPI driver or OSPM code. The debug
14992 version of the code includes the debug output trace mechanism and
14993 has a much larger code and data size. Note that these values will
14994 vary depending on the efficiency of the compiler and the compiler
14995 options used during generation.
14998 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
14999 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
15001 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15002 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
15007 Cleaned up EC driver. Exported an external EC read/write
15008 interface. By going through this, other drivers (most notably
15009 sonypi) will be able to serialize access to the EC.
15012 3) iASL Compiler/Disassembler
15014 Implemented support to optionally generate include files for both
15015 ASM and C (the -i switch). This simplifies BIOS development by
15016 automatically creating include files that contain external
15017 declarations for the symbols that are created within the
15019 (optionally generated) ASM and C AML source files.
15022 ----------------------------------------
15023 15 November 2002. Summary of changes for version 20021115.
15025 1) ACPI CA Core Subsystem:
15027 Fixed a memory leak problem where an error during resolution of
15029 method arguments during a method invocation from another method
15030 failed to cleanup properly by deleting all successfully resolved
15033 Fixed a problem where the target of the Index() operator was not
15034 correctly constructed if the source object was a package. This
15035 problem has not been detected because the use of a target operand
15036 with Index() is very rare.
15038 Fixed a problem with the Index() operator where an attempt was
15039 made to delete the operand objects twice.
15041 Fixed a problem where an attempt was made to delete an operand
15042 twice during execution of the CondRefOf() operator if the target
15045 Implemented the first of perhaps several internal create object
15046 functions that create and initialize a specific object type. This
15047 consolidates duplicated code wherever the object is created, thus
15048 shrinking the size of the subsystem.
15050 Implemented improved debug/error messages for errors that occur
15051 during nested method invocations. All executing method pathnames
15052 are displayed (with the error) as the call stack is unwound - thus
15055 Fixed a problem introduced in the 10/02 release that caused
15056 premature deletion of a buffer object if a buffer was used as an
15057 ASL operand where an integer operand is required (Thus causing an
15058 implicit object conversion from Buffer to Integer.) The change in
15059 the 10/02 release was attempting to fix a memory leak (albeit
15062 Code and Data Size: Current core subsystem library sizes are shown
15063 below. These are the code and data sizes for the acpica.lib
15064 produced by the Microsoft Visual C++ 6.0 compiler, and these
15065 values do not include any ACPI driver or OSPM code. The debug
15066 version of the code includes the debug output trace mechanism and
15067 has a much larger code and data size. Note that these values will
15068 vary depending on the efficiency of the compiler and the compiler
15069 options used during generation.
15072 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
15073 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
15075 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
15076 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
15081 Changed the implementation of the ACPI semaphores to use down()
15082 instead of down_interruptable(). It is important that the
15083 execution of ACPI control methods not be interrupted by signals.
15084 Methods must run to completion, or the system may be left in an
15085 unknown/unstable state.
15087 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
15091 3) iASL Compiler/Disassembler
15094 Changed the default location of output files. All output files
15095 are now placed in the current directory by default instead of in
15096 the directory of the source file. This change may affect some
15097 existing makefiles, but it brings the behavior of the compiler in
15098 line with other similar tools. The location of the output files
15099 can be overridden with the -p command line switch.
15102 ----------------------------------------
15103 11 November 2002. Summary of changes for version 20021111.
15106 0) ACPI Specification 2.0B is released and is now available at:
15107 http://www.acpi.info/index.html
15110 1) ACPI CA Core Subsystem:
15112 Implemented support for the ACPI 2.0 SMBus Operation Regions.
15113 This includes the early detection and handoff of the request to
15114 the SMBus region handler (avoiding all of the complex field
15115 support code), and support for the bidirectional return packet
15116 from an SMBus write operation. This paves the way for the
15117 development of SMBus drivers in each host operating system.
15119 Fixed a problem where the semaphore WAIT_FOREVER constant was
15120 defined as 32 bits, but must be 16 bits according to the ACPI
15121 specification. This had the side effect of causing ASL
15122 Mutex/Event timeouts even though the ASL code requested a wait
15123 forever. Changed all internal references to the ACPI timeout
15124 parameter to 16 bits to prevent future problems. Changed the name
15125 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
15127 Code and Data Size: Current core subsystem library sizes are shown
15128 below. These are the code and data sizes for the acpica.lib
15129 produced by the Microsoft Visual C++ 6.0 compiler, and these
15130 values do not include any ACPI driver or OSPM code. The debug
15131 version of the code includes the debug output trace mechanism and
15132 has a much larger code and data size. Note that these values will
15133 vary depending on the efficiency of the compiler and the compiler
15134 options used during generation.
15137 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15138 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
15140 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
15141 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
15146 Module loading/unloading fixes (John Cagle)
15149 3) iASL Compiler/Disassembler
15151 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
15153 Implemented support for the disassembly of all SMBus protocol
15154 keywords (SMBQuick, SMBWord, etc.)
15156 ----------------------------------------
15157 01 November 2002. Summary of changes for version 20021101.
15160 1) ACPI CA Core Subsystem:
15162 Fixed a problem where platforms that have a GPE1 block but no GPE0
15163 block were not handled correctly. This resulted in a "GPE
15164 overlap" error message. GPE0 is no longer required.
15166 Removed code added in the previous release that inserted nodes
15167 into the namespace in alphabetical order. This caused some side-
15168 effects on various machines. The root cause of the problem is
15169 still under investigation since in theory, the internal ordering
15170 of the namespace nodes should not matter.
15173 Enhanced error reporting for the case where a named object is not
15174 found during control method execution. The full ACPI namepath
15175 (name reference) of the object that was not found is displayed in
15178 Note: as a result of the overhaul of the namespace object types in
15179 the previous release, the namespace nodes for the predefined
15180 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
15181 instead of ACPI_TYPE_ANY. This simplifies the namespace
15182 management code but may affect code that walks the namespace tree
15183 looking for specific object types.
15185 Code and Data Size: Current core subsystem library sizes are shown
15186 below. These are the code and data sizes for the acpica.lib
15187 produced by the Microsoft Visual C++ 6.0 compiler, and these
15188 values do not include any ACPI driver or OSPM code. The debug
15189 version of the code includes the debug output trace mechanism and
15190 has a much larger code and data size. Note that these values will
15191 vary depending on the efficiency of the compiler and the compiler
15192 options used during generation.
15195 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
15196 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
15198 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15199 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
15204 Fixed a problem introduced in the previous release where the
15205 Processor and Thermal objects were not recognized and installed in
15206 /proc. This was related to the scope type change described above.
15209 3) iASL Compiler/Disassembler
15211 Implemented the -g option to get all of the required ACPI tables
15212 from the registry and save them to files (Windows version of the
15213 compiler only.) The required tables are the FADT, FACS, and DSDT.
15215 Added ACPI table checksum validation during table disassembly in
15216 order to catch corrupted tables.
15219 ----------------------------------------
15220 22 October 2002. Summary of changes for version 20021022.
15222 1) ACPI CA Core Subsystem:
15224 Implemented a restriction on the Scope operator that the target
15225 must already exist in the namespace at the time the operator is
15226 encountered (during table load or method execution). In other
15227 words, forward references are not allowed and Scope() cannot
15228 create a new object. This changes the previous behavior where the
15229 interpreter would create the name if not found. This new behavior
15230 correctly enables the search-to-root algorithm during namespace
15231 lookup of the target name. Because of this upsearch, this fixes
15232 the known Compaq _SB_.OKEC problem and makes both the AML
15233 interpreter and iASL compiler compatible with other ACPI
15236 Completed a major overhaul of the internal ACPI object types for
15237 the ACPI Namespace and the associated operand objects. Many of
15238 these types had become obsolete with the introduction of the two-
15239 pass namespace load. This cleanup simplifies the code and makes
15240 the entire namespace load mechanism much clearer and easier to
15243 Improved debug output for tracking scope opening/closing to help
15244 diagnose scoping issues. The old scope name as well as the new
15245 scope name are displayed. Also improved error messages for
15246 problems with ASL Mutex objects and error messages for GPE
15249 Cleaned up the namespace dump code, removed obsolete code.
15251 All string output (for all namespace/object dumps) now uses the
15252 common ACPI string output procedure which handles escapes properly
15253 and does not emit non-printable characters.
15255 Fixed some issues with constants in the 64-bit version of the
15256 local C library (utclib.c)
15261 EC Driver: No longer attempts to acquire the Global Lock at
15265 3) iASL Compiler/Disassembler
15267 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
15268 2 opcodes outside of a control method. This means that the
15269 "executable" operators (versus the "namespace" operators) cannot
15270 be used at the table level; they can only be used within a control
15273 Implemented the restriction on the Scope() operator where the
15274 target must already exist in the namespace at the time the
15275 operator is encountered (during ASL compilation). In other words,
15276 forward references are not allowed and Scope() cannot create a new
15277 object. This makes the iASL compiler compatible with other ACPI
15278 implementations and makes the Scope() implementation adhere to the
15279 ACPI specification.
15281 Fixed a problem where namepath optimization for the Alias operator
15282 was optimizing the wrong path (of the two namepaths.) This caused
15283 a "Missing alias link" error message.
15285 Fixed a problem where an "unknown reserved name" warning could be
15286 incorrectly generated for names like "_SB" when the trailing
15287 underscore is not used in the original ASL.
15289 Fixed a problem where the reserved name check did not handle
15290 NamePaths with multiple NameSegs correctly. The first nameseg of
15291 the NamePath was examined instead of the last NameSeg.
15294 ----------------------------------------
15296 02 October 2002. Summary of changes for this release.
15299 1) ACPI CA Core Subsystem version 20021002:
15301 Fixed a problem where a store/copy of a string to an existing
15302 string did not always set the string length properly in the String
15305 Fixed a reported problem with the ToString operator where the
15306 behavior was identical to the ToHexString operator instead of just
15307 simply converting a raw buffer to a string data type.
15309 Fixed a problem where CopyObject and the other "explicit"
15310 conversion operators were not updating the internal namespace node
15311 type as part of the store operation.
15313 Fixed a memory leak during implicit source operand conversion
15314 where the original object was not deleted if it was converted to a
15315 new object of a different type.
15317 Enhanced error messages for all problems associated with namespace
15318 lookups. Common procedure generates and prints the lookup name as
15319 well as the formatted status.
15321 Completed implementation of a new design for the Alias support
15322 within the namespace. The existing design did not handle the case
15323 where a new object was assigned to one of the two names due to the
15324 use of an explicit conversion operator, resulting in the two names
15325 pointing to two different objects. The new design simply points
15326 the Alias name to the original name node - not to the object.
15327 This results in a level of indirection that must be handled in the
15328 name resolution mechanism.
15330 Code and Data Size: Current core subsystem library sizes are shown
15331 below. These are the code and data sizes for the acpica.lib
15332 produced by the Microsoft Visual C++ 6.0 compiler, and these
15333 values do not include any ACPI driver or OSPM code. The debug
15334 version of the code includes the debug output trace mechanism and
15335 has a larger code and data size. Note that these values will vary
15336 depending on the efficiency of the compiler and the compiler
15337 options used during generation.
15340 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
15341 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
15343 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
15344 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
15349 Initialize thermal driver's timer before it is used. (Knut
15352 Allow handling negative celsius values. (Kochi Takayoshi)
15354 Fix thermal management and make trip points. R/W (Pavel Machek)
15356 Fix /proc/acpi/sleep. (P. Christeas)
15358 IA64 fixes. (David Mosberger)
15360 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
15362 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
15366 3) iASL Compiler/Disassembler
15368 Clarified some warning/error messages.
15371 ----------------------------------------
15372 18 September 2002. Summary of changes for this release.
15375 1) ACPI CA Core Subsystem version 20020918:
15377 Fixed a reported problem with reference chaining (via the Index()
15378 and RefOf() operators) in the ObjectType() and SizeOf() operators.
15379 The definition of these operators includes the dereferencing of
15380 all chained references to return information on the base object.
15382 Fixed a problem with stores to indexed package elements - the
15383 existing code would not complete the store if an "implicit
15384 conversion" was not performed. In other words, if the existing
15385 object (package element) was to be replaced completely, the code
15386 didn't handle this case.
15388 Relaxed typechecking on the ASL "Scope" operator to allow the
15389 target name to refer to an object of type Integer, String, or
15390 Buffer, in addition to the scoping object types (Device,
15391 predefined Scopes, Processor, PowerResource, and ThermalZone.)
15392 This allows existing AML code that has workarounds for a bug in
15393 Windows to function properly. A warning is issued, however. This
15394 affects both the AML interpreter and the iASL compiler. Below is
15395 an example of this type of ASL code:
15401 Fixed some reported problems with 64-bit integer support in the
15402 local implementation of C library functions (clib.c)
15407 Use ACPI fix map region instead of IOAPIC region, since it is
15408 undefined in non-SMP.
15410 Ensure that the SCI has the proper polarity and trigger, even on
15411 systems that do not have an interrupt override entry in the MADT.
15413 2.5 big driver reorganization (Pat Mochel)
15415 Use early table mapping code from acpitable.c (Andi Kleen)
15417 New blacklist entries (Andi Kleen)
15419 Blacklist improvements. Split blacklist code out into a separate
15420 file. Move checking the blacklist to very early. Previously, we
15421 would use ACPI tables, and then halfway through init, check the
15422 blacklist -- too late. Now, it's early enough to completely fall-
15426 3) iASL Compiler/Disassembler version 20020918:
15428 Fixed a problem where the typechecking code didn't know that an
15429 alias could point to a method. In other words, aliases were not
15430 being dereferenced during typechecking.
15433 ----------------------------------------
15434 29 August 2002. Summary of changes for this release.
15436 1) ACPI CA Core Subsystem Version 20020829:
15438 If the target of a Scope() operator already exists, it must be an
15439 object type that actually opens a scope -- such as a Device,
15440 Method, Scope, etc. This is a fatal runtime error. Similar error
15441 check has been added to the iASL compiler also.
15443 Tightened up the namespace load to disallow multiple names in the
15444 same scope. This previously was allowed if both objects were of
15445 the same type. (i.e., a lookup was the same as entering a new
15451 Ensure that the ACPI interrupt has the proper trigger and
15454 local_irq_disable is extraneous. (Matthew Wilcox)
15456 Make "acpi=off" actually do what it says, and not use the ACPI
15457 interpreter *or* the tables.
15459 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
15463 3) iASL Compiler/Disassembler Version 20020829:
15465 Implemented namepath optimization for name declarations. For
15466 example, a declaration like "Method (\_SB_.ABCD)" would get
15467 optimized to "Method (ABCD)" if the declaration is within the
15468 \_SB_ scope. This optimization is in addition to the named
15469 reference path optimization first released in the previous
15470 version. This would seem to complete all possible optimizations
15471 for namepaths within the ASL/AML.
15473 If the target of a Scope() operator already exists, it must be an
15474 object type that actually opens a scope -- such as a Device,
15475 Method, Scope, etc.
15477 Implemented a check and warning for unreachable code in the same
15478 block below a Return() statement.
15480 Fixed a problem where the listing file was not generated if the
15481 compiler aborted if the maximum error count was exceeded (200).
15483 Fixed a problem where the typechecking of method return values was
15484 broken. This includes the check for a return value when the
15485 method is invoked as a TermArg (a return value is expected.)
15487 Fixed a reported problem where EOF conditions during a quoted
15488 string or comment caused a fault.
15491 ----------------------------------------
15492 15 August 2002. Summary of changes for this release.
15494 1) ACPI CA Core Subsystem Version 20020815:
15496 Fixed a reported problem where a Store to a method argument that
15497 contains a reference did not perform the indirect store correctly.
15498 This problem was created during the conversion to the new
15499 reference object model - the indirect store to a method argument
15500 code was not updated to reflect the new model.
15502 Reworked the ACPI mode change code to better conform to ACPI 2.0,
15503 handle corner cases, and improve code legibility (Kochi Takayoshi)
15505 Fixed a problem with the pathname parsing for the carat (^)
15506 prefix. The heavy use of the carat operator by the new namepath
15507 optimization in the iASL compiler uncovered a problem with the AML
15508 interpreter handling of this prefix. In the case where one or
15509 more carats precede a single nameseg, the nameseg was treated as
15510 standalone and the search rule (to root) was inadvertently
15511 applied. This could cause both the iASL compiler and the
15512 interpreter to find the wrong object or to miss the error that
15513 should occur if the object does not exist at that exact pathname.
15515 Found and fixed the problem where the HP Pavilion DSDT would not
15516 load. This was a relatively minor tweak to the table loading code
15517 (a problem caused by the unexpected encounter with a method
15518 invocation not within a control method), but it does not solve the
15519 overall issue of the execution of AML code at the table level.
15520 This investigation is still ongoing.
15522 Code and Data Size: Current core subsystem library sizes are shown
15523 below. These are the code and data sizes for the acpica.lib
15524 produced by the Microsoft Visual C++ 6.0 compiler, and these
15525 values do not include any ACPI driver or OSPM code. The debug
15526 version of the code includes the debug output trace mechanism and
15527 has a larger code and data size. Note that these values will vary
15528 depending on the efficiency of the compiler and the compiler
15529 options used during generation.
15532 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
15533 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
15535 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
15536 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
15541 Remove redundant slab.h include (Brad Hards)
15543 Fix several bugs in thermal.c (Herbert Nachtnebel)
15545 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
15547 Change acpi_system_suspend to use updated irq functions (Pavel
15550 Export acpi_get_firmware_table (Matthew Wilcox)
15552 Use proper root proc entry for ACPI (Kochi Takayoshi)
15554 Fix early-boot table parsing (Bjorn Helgaas)
15557 3) iASL Compiler/Disassembler
15559 Reworked the compiler options to make them more consistent and to
15560 use two-letter options where appropriate. We were running out of
15561 sensible letters. This may break some makefiles, so check the
15562 current options list by invoking the compiler with no parameters.
15564 Completed the design and implementation of the ASL namepath
15565 optimization option for the compiler. This option optimizes all
15566 references to named objects to the shortest possible path. The
15567 first attempt tries to utilize a single nameseg (4 characters) and
15568 the "search-to-root" algorithm used by the interpreter. If that
15569 cannot be used (because either the name is not in the search path
15570 or there is a conflict with another object with the same name),
15571 the pathname is optimized using the carat prefix (usually a
15572 shorter string than specifying the entire path from the root.)
15574 Implemented support to obtain the DSDT from the Windows registry
15575 (when the disassembly option is specified with no input file).
15576 Added this code as the implementation for AcpiOsTableOverride in
15577 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
15578 utility) to scan memory for the DSDT to the AcpiOsTableOverride
15579 function in the DOS OSL to make the disassembler truly OS
15582 Implemented a new option to disassemble and compile in one step.
15583 When used without an input filename, this option will grab the
15584 DSDT from the local machine, disassemble it, and compile it in one
15587 Added a warning message for invalid escapes (a backslash followed
15588 by any character other than the allowable escapes). This catches
15589 the quoted string error "\_SB_" (which should be "\\_SB_" ).
15591 Also, there are numerous instances in the ACPI specification where
15594 Added a compiler option to disable all optimizations. This is
15595 basically the "compatibility mode" because by using this option,
15596 the AML code will come out exactly the same as other ASL
15599 Added error messages for incorrectly ordered dependent resource
15600 functions. This includes: missing EndDependentFn macro at end of
15601 dependent resource list, nested dependent function macros (both
15602 start and end), and missing StartDependentFn macro. These are
15603 common errors that should be caught at compile time.
15605 Implemented _OSI support for the disassembler and compiler. _OSI
15606 must be included in the namespace for proper disassembly (because
15607 the disassembler must know the number of arguments.)
15609 Added an "optimization" message type that is optional (off by
15610 default). This message is used for all optimizations - including
15611 constant folding, integer optimization, and namepath optimization.
15613 ----------------------------------------
15614 25 July 2002. Summary of changes for this release.
15617 1) ACPI CA Core Subsystem Version 20020725:
15619 The AML Disassembler has been enhanced to produce compilable ASL
15620 code and has been integrated into the iASL compiler (see below) as
15621 well as the single-step disassembly for the AML debugger and the
15622 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
15623 resource templates and macros are fully supported. The
15624 disassembler has been tested on over 30 different AML files,
15625 producing identical AML when the resulting disassembled ASL file
15626 is recompiled with the same ASL compiler.
15628 Modified the Resource Manager to allow zero interrupts and zero
15629 dma channels during the GetCurrentResources call. This was
15630 causing problems on some platforms.
15632 Added the AcpiOsRedirectOutput interface to the OSL to simplify
15633 output redirection for the AcpiOsPrintf and AcpiOsVprintf
15636 Code and Data Size: Current core subsystem library sizes are shown
15637 below. These are the code and data sizes for the acpica.lib
15638 produced by the Microsoft Visual C++ 6.0 compiler, and these
15639 values do not include any ACPI driver or OSPM code. The debug
15640 version of the code includes the debug output trace mechanism and
15641 has a larger code and data size. Note that these values will vary
15642 depending on the efficiency of the compiler and the compiler
15643 options used during generation.
15646 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
15647 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
15649 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
15650 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
15655 Fixed a panic in the EC driver (Dominik Brodowski)
15657 Implemented checksum of the R/XSDT itself during Linux table scan
15663 The AML disassembler is integrated into the compiler. The "-d"
15664 option invokes the disassembler to completely disassemble an
15665 input AML file, producing as output a text ASL file with the
15666 extension ".dsl" (to avoid name collisions with existing .asl
15667 source files.) A future enhancement will allow the disassembler
15668 to obtain the BIOS DSDT from the registry under Windows.
15670 Fixed a problem with the VendorShort and VendorLong resource
15671 descriptors where an invalid AML sequence was created.
15673 Implemented a fix for BufferData term in the ASL parser. It was
15674 inadvertently defined twice, allowing invalid syntax to pass and
15675 causing reduction conflicts.
15677 Fixed a problem where the Ones opcode could get converted to a
15678 value of zero if "Ones" was used where a byte, word or dword value
15679 was expected. The 64-bit value is now truncated to the correct
15680 size with the correct value.
15684 ----------------------------------------
15685 02 July 2002. Summary of changes for this release.
15688 1) ACPI CA Core Subsystem Version 20020702:
15690 The Table Manager code has been restructured to add several new
15691 features. Tables that are not required by the core subsystem
15692 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
15693 validated in any way and are returned from AcpiGetFirmwareTable if
15694 requested. The AcpiOsTableOverride interface is now called for
15695 each table that is loaded by the subsystem in order to allow the
15696 host to override any table it chooses. Previously, only the DSDT
15697 could be overridden. Added one new files, tbrsdt.c and
15700 Fixed a problem with the conversion of internal package objects to
15701 external objects (when a package is returned from a control
15702 method.) The return buffer length was set to zero instead of the
15703 proper length of the package object.
15705 Fixed a reported problem with the use of the RefOf and DeRefOf
15706 operators when passing reference arguments to control methods. A
15707 new type of Reference object is used internally for references
15708 produced by the RefOf operator.
15710 Added additional error messages in the Resource Manager to explain
15711 AE_BAD_DATA errors when they occur during resource parsing.
15713 Split the AcpiEnableSubsystem into two primitives to enable a
15714 finer granularity initialization sequence. These two calls should
15715 be called in this order: AcpiEnableSubsystem (flags),
15716 AcpiInitializeObjects (flags). The flags parameter remains the
15722 Updated the ACPI utilities module to understand the new style of
15723 fully resolved package objects that are now returned from the core
15724 subsystem. This eliminates errors of the form:
15726 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
15727 acpi_utils-0430 [145] acpi_evaluate_reference:
15728 Invalid element in package (not a device reference)
15730 The method evaluation utility uses the new buffer allocation
15731 scheme instead of calling AcpiEvaluate Object twice.
15733 Added support for ECDT. This allows the use of the Embedded
15735 Controller before the namespace has been fully initialized, which
15736 is necessary for ACPI 2.0 support, and for some laptops to
15737 initialize properly. (Laptops using ECDT are still rare, so only
15738 limited testing was performed of the added functionality.)
15740 Fixed memory leaks in the EC driver.
15742 Eliminated a brittle code structure in acpi_bus_init().
15744 Eliminated the acpi_evaluate() helper function in utils.c. It is
15745 no longer needed since acpi_evaluate_object can optionally
15746 allocate memory for the return object.
15748 Implemented fix for keyboard hang when getting battery readings on
15749 some systems (Stephen White)
15751 PCI IRQ routing update (Dominik Brodowski)
15753 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
15756 ----------------------------------------
15757 11 June 2002. Summary of changes for this release.
15760 1) ACPI CA Core Subsystem Version 20020611:
15762 Fixed a reported problem where constants such as Zero and One
15763 appearing within _PRT packages were not handled correctly within
15764 the resource manager code. Originally reported against the ASL
15765 compiler because the code generator now optimizes integers to
15766 their minimal AML representation (i.e. AML constants if possible.)
15767 The _PRT code now handles all AML constant opcodes correctly
15768 (Zero, One, Ones, Revision).
15770 Fixed a problem with the Concatenate operator in the AML
15771 interpreter where a buffer result object was incorrectly marked as
15772 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
15774 All package sub-objects are now fully resolved before they are
15775 returned from the external ACPI interfaces. This means that name
15776 strings are resolved to object handles, and constant operators
15777 (Zero, One, Ones, Revision) are resolved to Integers.
15779 Implemented immediate resolution of the AML Constant opcodes
15780 (Zero, One, Ones, Revision) to Integer objects upon detection
15781 within the AML stream. This has simplified and reduced the
15782 generated code size of the subsystem by eliminating about 10
15783 switch statements for these constants (which previously were
15784 contained in Reference objects.) The complicating issues are that
15785 the Zero opcode is used as a "placeholder" for unspecified
15786 optional target operands and stores to constants are defined to be
15789 Code and Data Size: Current core subsystem library sizes are shown
15790 below. These are the code and data sizes for the acpica.lib
15791 produced by the Microsoft Visual C++ 6.0 compiler, and these
15792 values do not include any ACPI driver or OSPM code. The debug
15793 version of the code includes the debug output trace mechanism and
15794 has a larger code and data size. Note that these values will vary
15795 depending on the efficiency of the compiler and the compiler
15796 options used during generation.
15799 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
15800 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
15802 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
15803 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
15809 Added preliminary support for obtaining _TRA data for PCI root
15810 bridges (Bjorn Helgaas).
15813 3) iASL Compiler Version X2046:
15815 Fixed a problem where the "_DDN" reserved name was defined to be a
15816 control method with one argument. There are no arguments, and
15817 _DDN does not have to be a control method.
15819 Fixed a problem with the Linux version of the compiler where the
15820 source lines printed with error messages were the wrong lines.
15821 This turned out to be the "LF versus CR/LF" difference between
15822 Windows and Unix. This appears to be the longstanding issue
15823 concerning listing output and error messages.
15825 Fixed a problem with the Linux version of compiler where opcode
15826 names within error messages were wrong. This was caused by a
15827 slight difference in the output of the Flex tool on Linux versus
15830 Fixed a problem with the Linux compiler where the hex output files
15831 contained some garbage data caused by an internal buffer overrun.
15834 ----------------------------------------
15835 17 May 2002. Summary of changes for this release.
15838 1) ACPI CA Core Subsystem Version 20020517:
15840 Implemented a workaround to an BIOS bug discovered on the HP
15841 OmniBook where the FADT revision number and the table size are
15842 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
15843 behavior is to fallback to using only the ACPI 1.0 fields of the
15844 FADT if the table is too small to be a ACPI 2.0 table as claimed
15845 by the revision number. Although this is a BIOS bug, this is a
15846 case where the workaround is simple enough and with no side
15847 effects, so it seemed prudent to add it. A warning message is
15850 Implemented minimum size checks for the fixed-length ACPI tables -
15851 - the FADT and FACS, as well as consistency checks between the
15852 revision number and the table size.
15854 Fixed a reported problem in the table override support where the
15855 new table pointer was incorrectly treated as a physical address
15856 instead of a logical address.
15858 Eliminated the use of the AE_AML_ERROR exception and replaced it
15859 with more descriptive codes.
15861 Fixed a problem where an exception would occur if an ASL Field was
15862 defined with no named Field Units underneath it (used by some
15865 Code and Data Size: Current core subsystem library sizes are shown
15866 below. These are the code and data sizes for the acpica.lib
15867 produced by the Microsoft Visual C++ 6.0 compiler, and these
15868 values do not include any ACPI driver or OSPM code. The debug
15869 version of the code includes the debug output trace mechanism and
15870 has a larger code and data size. Note that these values will vary
15871 depending on the efficiency of the compiler and the compiler
15872 options used during generation.
15875 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
15876 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
15878 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
15879 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
15885 Much work done on ACPI init (MADT and PCI IRQ routing support).
15886 (Paul D. and Dominik Brodowski)
15888 Fix PCI IRQ-related panic on boot (Sam Revitch)
15890 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
15892 Fix "MHz" typo (Dominik Brodowski)
15894 Fix RTC year 2000 issue (Dominik Brodowski)
15896 Preclude multiple button proc entries (Eric Brunet)
15898 Moved arch-specific code out of include/platform/aclinux.h
15900 3) iASL Compiler Version X2044:
15902 Implemented error checking for the string used in the EISAID macro
15903 (Usually used in the definition of the _HID object.) The code now
15904 strictly enforces the PnP format - exactly 7 characters, 3
15905 uppercase letters and 4 hex digits.
15907 If a raw string is used in the definition of the _HID object
15908 (instead of the EISAID macro), the string must contain all
15909 alphanumeric characters (e.g., "*PNP0011" is not allowed because
15912 Implemented checking for invalid use of ACPI reserved names for
15913 most of the name creation operators (Name, Device, Event, Mutex,
15914 OperationRegion, PowerResource, Processor, and ThermalZone.)
15915 Previously, this check was only performed for control methods.
15917 Implemented an additional check on the Name operator to emit an
15918 error if a reserved name that must be implemented in ASL as a
15919 control method is used. We know that a reserved name must be a
15920 method if it is defined with input arguments.
15922 The warning emitted when a namespace object reference is not found
15923 during the cross reference phase has been changed into an error.
15924 The "External" directive should be used for names defined in other
15928 4) Tools and Utilities
15930 The 16-bit tools (adump16 and aexec16) have been regenerated and
15933 Fixed a problem with the output of both acpidump and adump16 where
15934 the indentation of closing parentheses and brackets was not
15936 aligned properly with the parent block.
15939 ----------------------------------------
15940 03 May 2002. Summary of changes for this release.
15943 1) ACPI CA Core Subsystem Version 20020503:
15945 Added support a new OSL interface that allows the host operating
15947 system software to override the DSDT found in the firmware -
15948 AcpiOsTableOverride. With this interface, the OSL can examine the
15949 version of the firmware DSDT and replace it with a different one
15952 Added new external interfaces for accessing ACPI registers from
15953 device drivers and other system software - AcpiGetRegister and
15954 AcpiSetRegister. This was simply an externalization of the
15955 existing AcpiHwBitRegister interfaces.
15957 Fixed a regression introduced in the previous build where the
15958 ASL/AML CreateField operator always returned an error,
15959 "destination must be a NS Node".
15961 Extended the maximum time (before failure) to successfully enable
15962 ACPI mode to 3 seconds.
15964 Code and Data Size: Current core subsystem library sizes are shown
15965 below. These are the code and data sizes for the acpica.lib
15966 produced by the Microsoft Visual C++ 6.0 compiler, and these
15967 values do not include any ACPI driver or OSPM code. The debug
15968 version of the code includes the debug output trace mechanism and
15969 has a larger code and data size. Note that these values will vary
15970 depending on the efficiency of the compiler and the compiler
15971 options used during generation.
15974 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
15975 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
15977 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
15978 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
15983 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
15984 free. While 3 out of 4 of our in-house systems work fine, the last
15985 one still hangs when testing the LAPIC timer.
15987 Renamed many files in 2.5 kernel release to omit "acpi_" from the
15990 Added warning on boot for Presario 711FR.
15992 Sleep improvements (Pavel Machek)
15994 ACPI can now be built without CONFIG_PCI enabled.
15996 IA64: Fixed memory map functions (JI Lee)
15999 3) iASL Compiler Version X2043:
16001 Added support to allow the compiler to be integrated into the MS
16002 VC++ development environment for one-button compilation of single
16003 files or entire projects -- with error-to-source-line mapping.
16005 Implemented support for compile-time constant folding for the
16006 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
16007 specification. This allows the ASL writer to use expressions
16008 instead of Integer/Buffer/String constants in terms that must
16009 evaluate to constants at compile time and will also simplify the
16010 emitted AML in any such sub-expressions that can be folded
16011 (evaluated at compile-time.) This increases the size of the
16012 compiler significantly because a portion of the ACPI CA AML
16013 interpreter is included within the compiler in order to pre-
16014 evaluate constant expressions.
16017 Fixed a problem with the "Unicode" ASL macro that caused the
16018 compiler to fault. (This macro is used in conjunction with the
16019 _STR reserved name.)
16021 Implemented an AML opcode optimization to use the Zero, One, and
16022 Ones opcodes where possible to further reduce the size of integer
16023 constants and thus reduce the overall size of the generated AML
16026 Implemented error checking for new reserved terms for ACPI version
16029 Implemented the -qr option to display the current list of ACPI
16030 reserved names known to the compiler.
16032 Implemented the -qc option to display the current list of ASL
16033 operators that are allowed within constant expressions and can
16034 therefore be folded at compile time if the operands are constants.
16039 Updated the Programmer's Reference for new interfaces, data types,
16040 and memory allocation model options.
16042 Updated the iASL Compiler User Reference to apply new format and
16043 add information about new features and options.
16045 ----------------------------------------
16046 19 April 2002. Summary of changes for this release.
16048 1) ACPI CA Core Subsystem Version 20020419:
16050 The source code base for the Core Subsystem has been completely
16051 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
16052 versions. The Lint option files used are included in the
16053 /acpi/generate/lint directory.
16055 Implemented enhanced status/error checking across the entire
16056 Hardware manager subsystem. Any hardware errors (reported from
16057 the OSL) are now bubbled up and will abort a running control
16061 Fixed a problem where the per-ACPI-table integer width (32 or 64)
16062 was stored only with control method nodes, causing a fault when
16063 non-control method code was executed during table loading. The
16064 solution implemented uses a global variable to indicate table
16065 width across the entire ACPI subsystem. Therefore, ACPI CA does
16066 not support mixed integer widths across different ACPI tables
16069 Fixed a problem where NULL extended fields (X fields) in an ACPI
16070 2.0 ACPI FADT caused the table load to fail. Although the
16071 existing ACPI specification is a bit fuzzy on this topic, the new
16072 behavior is to fall back on a ACPI 1.0 field if the corresponding
16073 ACPI 2.0 X field is zero (even though the table revision indicates
16074 a full ACPI 2.0 table.) The ACPI specification will be updated to
16075 clarify this issue.
16077 Fixed a problem with the SystemMemory operation region handler
16078 where memory was always accessed byte-wise even if the AML-
16079 specified access width was larger than a byte. This caused
16080 problems on systems with memory-mapped I/O. Memory is now
16081 accessed with the width specified. On systems that do not support
16082 non-aligned transfers, a check is made to guarantee proper address
16083 alignment before proceeding in order to avoid an AML-caused
16084 alignment fault within the kernel.
16087 Fixed a problem with the ExtendedIrq resource where only one byte
16088 of the 4-byte Irq field was extracted.
16090 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
16091 function was out of date and required a rewrite.
16093 Code and Data Size: Current core subsystem library sizes are shown
16094 below. These are the code and data sizes for the acpica.lib
16095 produced by the Microsoft Visual C++ 6.0 compiler, and these
16096 values do not include any ACPI driver or OSPM code. The debug
16097 version of the code includes the debug output trace mechanism and
16098 has a larger code and data size. Note that these values will vary
16099 depending on the efficiency of the compiler and the compiler
16100 options used during generation.
16103 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
16104 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
16106 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
16107 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
16112 PCI IRQ routing fixes (Dominik Brodowski)
16115 3) iASL Compiler Version X2042:
16117 Implemented an additional compile-time error check for a field
16118 unit whose size + minimum access width would cause a run-time
16119 access beyond the end-of-region. Previously, only the field size
16120 itself was checked.
16122 The Core subsystem and iASL compiler now share a common parse
16123 object in preparation for compile-time evaluation of the type
16124 3/4/5 ASL operators.
16127 ----------------------------------------
16128 Summary of changes for this release: 03_29_02
16130 1) ACPI CA Core Subsystem Version 20020329:
16132 Implemented support for late evaluation of TermArg operands to
16133 Buffer and Package objects. This allows complex expressions to be
16134 used in the declarations of these object types.
16136 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
16137 1.0, if the field was larger than 32 bits, it was returned as a
16138 buffer - otherwise it was returned as an integer. In ACPI 2.0,
16139 the field is returned as a buffer only if the field is larger than
16140 64 bits. The TableRevision is now considered when making this
16141 conversion to avoid incompatibility with existing ASL code.
16143 Implemented logical addressing for AcpiOsGetRootPointer. This
16144 allows an RSDP with either a logical or physical address. With
16145 this support, the host OS can now override all ACPI tables with
16146 one logical RSDP. Includes implementation of "typed" pointer
16147 support to allow a common data type for both physical and logical
16148 pointers internally. This required a change to the
16149 AcpiOsGetRootPointer interface.
16151 Implemented the use of ACPI 2.0 Generic Address Structures for all
16152 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
16153 mapped I/O for these ACPI features.
16155 Initialization now ignores not only non-required tables (All
16156 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
16157 not validate the table headers of unrecognized tables.
16159 Fixed a problem where a notify handler could only be
16160 installed/removed on an object of type Device. All "notify"
16162 objects are now supported -- Devices, Processor, Power, and
16165 Removed most verbosity from the ACPI_DB_INFO debug level. Only
16166 critical information is returned when this debug level is enabled.
16168 Code and Data Size: Current core subsystem library sizes are shown
16169 below. These are the code and data sizes for the acpica.lib
16170 produced by the Microsoft Visual C++ 6.0 compiler, and these
16171 values do not include any ACPI driver or OSPM code. The debug
16172 version of the code includes the debug output trace mechanism and
16173 has a larger code and data size. Note that these values will vary
16174 depending on the efficiency of the compiler and the compiler
16175 options used during generation.
16178 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
16179 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
16181 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
16182 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
16187 The processor driver (acpi_processor.c) now fully supports ACPI
16188 2.0-based processor performance control (e.g. Intel(R)
16189 SpeedStep(TM) technology) Note that older laptops that only have
16190 the Intel "applet" interface are not supported through this. The
16191 'limit' and 'performance' interface (/proc) are fully functional.
16192 [Note that basic policy for controlling performance state
16193 transitions will be included in the next version of ospmd.] The
16194 idle handler was modified to more aggressively use C2, and PIIX4
16195 errata handling underwent a complete overhaul (big thanks to
16196 Dominik Brodowski).
16198 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
16199 based devices in the ACPI namespace are now dynamically bound
16200 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
16201 This allows, among other things, ACPI to resolve bus numbers for
16202 subordinate PCI bridges.
16204 Enhanced PCI IRQ routing to get the proper bus number for _PRT
16205 entries defined underneath PCI bridges.
16207 Added IBM 600E to bad bios list due to invalid _ADR value for
16208 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
16210 In the process of adding full MADT support (e.g. IOAPIC) for IA32
16211 (acpi.c, mpparse.c) -- stay tuned.
16213 Added back visual differentiation between fixed-feature and
16214 control-method buttons in dmesg. Buttons are also subtyped (e.g.
16215 button/power/PWRF) to simplify button identification.
16217 We no longer use -Wno-unused when compiling debug. Please ignore
16218 any "_THIS_MODULE defined but not used" messages.
16220 Can now shut down the system using "magic sysrq" key.
16223 3) iASL Compiler version 2041:
16225 Fixed a problem where conversion errors for hex/octal/decimal
16226 constants were not reported.
16228 Implemented a fix for the General Register template Address field.
16229 This field was 8 bits when it should be 64.
16231 Fixed a problem where errors/warnings were no longer being emitted
16232 within the listing output file.
16234 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
16235 exactly 4 characters, alphanumeric only.
16240 ----------------------------------------
16241 Summary of changes for this release: 03_08_02
16244 1) ACPI CA Core Subsystem Version 20020308:
16246 Fixed a problem with AML Fields where the use of the "AccessAny"
16247 keyword could cause an interpreter error due to attempting to read
16248 or write beyond the end of the parent Operation Region.
16250 Fixed a problem in the SystemMemory Operation Region handler where
16251 an attempt was made to map memory beyond the end of the region.
16252 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
16253 errors on some Linux systems.
16255 Fixed a problem where the interpreter/namespace "search to root"
16256 algorithm was not functioning for some object types. Relaxed the
16257 internal restriction on the search to allow upsearches for all
16258 external object types as well as most internal types.
16263 We now use safe_halt() macro versus individual calls to sti | hlt.
16265 Writing to the processor limit interface should now work. "echo 1"
16266 will increase the limit, 2 will decrease, and 0 will reset to the
16273 Fixed segfault on Linux version.
16276 ----------------------------------------
16277 Summary of changes for this release: 02_25_02
16279 1) ACPI CA Core Subsystem:
16282 Fixed a problem where the GPE bit masks were not initialized
16283 properly, causing erratic GPE behavior.
16285 Implemented limited support for multiple calling conventions. The
16286 code can be generated with either the VPL (variable parameter
16287 list, or "C") convention, or the FPL (fixed parameter list, or
16288 "Pascal") convention. The core subsystem is about 3.4% smaller
16289 when generated with FPL.
16294 Re-add some /proc/acpi/event functionality that was lost during
16297 Resolved issue with /proc events for fixed-feature buttons showing
16298 up as the system device.
16300 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
16302 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
16304 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
16306 Fixed limit interface & usage to fix bugs with passive cooling
16309 Restructured PRT support.
16312 ----------------------------------------
16313 Summary of changes for this label: 02_14_02
16316 1) ACPI CA Core Subsystem:
16318 Implemented support in AcpiLoadTable to allow loading of FACS and
16321 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
16322 been removed. All 64-bit platforms should be migrated to the ACPI
16323 2.0 tables. The actbl71.h header has been removed from the source
16326 All C macros defined within the subsystem have been prefixed with
16327 "ACPI_" to avoid collision with other system include files.
16329 Removed the return value for the two AcpiOsPrint interfaces, since
16330 it is never used and causes lint warnings for ignoring the return
16333 Added error checking to all internal mutex acquire and release
16334 calls. Although a failure from one of these interfaces is
16335 probably a fatal system error, these checks will cause the
16336 immediate abort of the currently executing method or interface.
16338 Fixed a problem where the AcpiSetCurrentResources interface could
16339 fault. This was a side effect of the deployment of the new memory
16342 Fixed a couple of problems with the Global Lock support introduced
16343 in the last major build. The "common" (1.0/2.0) internal FACS was
16344 being overwritten with the FACS signature and clobbering the
16345 Global Lock pointer. Also, the actual firmware FACS was being
16346 unmapped after construction of the "common" FACS, preventing
16347 access to the actual Global Lock field within it. The "common"
16348 internal FACS is no longer installed as an actual ACPI table; it
16349 is used simply as a global.
16351 Code and Data Size: Current core subsystem library sizes are shown
16352 below. These are the code and data sizes for the acpica.lib
16353 produced by the Microsoft Visual C++ 6.0 compiler, and these
16354 values do not include any ACPI driver or OSPM code. The debug
16355 version of the code includes the debug output trace mechanism and
16356 has a larger code and data size. Note that these values will vary
16357 depending on the efficiency of the compiler and the compiler
16358 options used during generation.
16360 Previous Release (02_07_01)
16361 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
16362 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
16364 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
16365 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
16370 Updated Linux-specific code for core macro and OSL interface
16371 changes described above.
16373 Improved /proc/acpi/event. It now can be opened only once and has
16374 proper poll functionality.
16376 Fixed and restructured power management (acpi_bus).
16378 Only create /proc "view by type" when devices of that class exist.
16380 Fixed "charging/discharging" bug (and others) in acpi_battery.
16382 Improved thermal zone code.
16385 3) ASL Compiler, version X2039:
16388 Implemented the new compiler restriction on ASL String hex/octal
16389 escapes to non-null, ASCII values. An error results if an invalid
16390 value is used. (This will require an ACPI 2.0 specification
16393 AML object labels that are output to the optional C and ASM source
16394 are now prefixed with both the ACPI table signature and table ID
16395 to help guarantee uniqueness within a large BIOS project.
16398 ----------------------------------------
16399 Summary of changes for this label: 02_01_02
16401 1) ACPI CA Core Subsystem:
16403 ACPI 2.0 support is complete in the entire Core Subsystem and the
16404 ASL compiler. All new ACPI 2.0 operators are implemented and all
16405 other changes for ACPI 2.0 support are complete. With
16406 simultaneous code and data optimizations throughout the subsystem,
16407 ACPI 2.0 support has been implemented with almost no additional
16408 cost in terms of code and data size.
16410 Implemented a new mechanism for allocation of return buffers. If
16411 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
16412 be allocated on behalf of the caller. Consolidated all return
16413 buffer validation and allocation to a common procedure. Return
16414 buffers will be allocated via the primary OSL allocation interface
16415 since it appears that a separate pool is not needed by most users.
16416 If a separate pool is required for these buffers, the caller can
16417 still use the original mechanism and pre-allocate the buffer(s).
16419 Implemented support for string operands within the DerefOf
16422 Restructured the Hardware and Event managers to be table driven,
16423 simplifying the source code and reducing the amount of generated
16426 Split the common read/write low-level ACPI register bitfield
16427 procedure into a separate read and write, simplifying the code
16430 Obsoleted the AcpiOsCallocate OSL interface. This interface was
16431 used only a handful of times and didn't have enough critical mass
16432 for a separate interface. Replaced with a common calloc procedure
16435 Fixed a reported problem with the GPE number mapping mechanism
16436 that allows GPE1 numbers to be non-contiguous with GPE0.
16437 Reorganized the GPE information and shrunk a large array that was
16438 originally large enough to hold info for all possible GPEs (256)
16439 to simply large enough to hold all GPEs up to the largest GPE
16440 number on the machine.
16442 Fixed a reported problem with resource structure alignment on 64-
16445 Changed the AcpiEnableEvent and AcpiDisableEvent external
16446 interfaces to not require any flags for the common case of
16447 enabling/disabling a GPE.
16449 Implemented support to allow a "Notify" on a Processor object.
16451 Most TBDs in comments within the source code have been resolved
16455 Fixed a problem in the interpreter where a standalone parent
16456 prefix (^) was not handled correctly in the interpreter and
16459 Removed obsolete and unnecessary GPE save/restore code.
16461 Implemented Field support in the ASL Load operator. This allows a
16462 table to be loaded from a named field, in addition to loading a
16463 table directly from an Operation Region.
16465 Implemented timeout and handle support in the external Global Lock
16468 Fixed a problem in the AcpiDump utility where pathnames were no
16469 longer being generated correctly during the dump of named objects.
16471 Modified the AML debugger to give a full display of if/while
16472 predicates instead of just one AML opcode at a time. (The
16473 predicate can have several nested ASL statements.) The old method
16474 was confusing during single stepping.
16476 Code and Data Size: Current core subsystem library sizes are shown
16477 below. These are the code and data sizes for the acpica.lib
16478 produced by the Microsoft Visual C++ 6.0 compiler, and these
16479 values do not include any ACPI driver or OSPM code. The debug
16480 version of the code includes the debug output trace mechanism and
16481 has a larger code and data size. Note that these values will vary
16482 depending on the efficiency of the compiler and the compiler
16483 options used during generation.
16485 Previous Release (12_18_01)
16486 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
16487 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
16489 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
16490 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
16494 Implemented fix for PIIX reverse throttling errata (Processor
16497 Added new Limit interface (Processor and Thermal drivers)
16499 New thermal policy (Thermal driver)
16501 Many updates to /proc
16503 Battery "low" event support (Battery driver)
16505 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
16507 IA32 - IA64 initialization unification, no longer experimental
16509 Menuconfig options redesigned
16511 3) ASL Compiler, version X2037:
16513 Implemented several new output features to simplify integration of
16514 AML code into firmware: 1) Output the AML in C source code with
16515 labels for each named ASL object. The original ASL source code
16516 is interleaved as C comments. 2) Output the AML in ASM source code
16517 with labels and interleaved ASL source. 3) Output the AML in
16518 raw hex table form, in either C or ASM.
16520 Implemented support for optional string parameters to the
16521 LoadTable operator.
16523 Completed support for embedded escape sequences within string
16524 literals. The compiler now supports all single character escapes
16525 as well as the Octal and Hex escapes. Note: the insertion of a
16526 null byte into a string literal (via the hex/octal escape) causes
16527 the string to be immediately terminated. A warning is issued.
16529 Fixed a problem where incorrect AML was generated for the case
16530 where an ASL namepath consists of a single parent prefix (
16532 ) with no trailing name segments.
16534 The compiler has been successfully generated with a 64-bit C
16540 ----------------------------------------
16541 Summary of changes for this label: 12_18_01
16545 Enhanced blacklist with reason and severity fields. Any table's
16546 signature may now be used to identify a blacklisted system.
16548 Call _PIC control method to inform the firmware which interrupt
16549 model the OS is using. Turn on any disabled link devices.
16551 Cleaned up busmgr /proc error handling (Andreas Dilger)
16553 2) ACPI CA Core Subsystem:
16555 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
16558 Completed implementation of the ACPI 2.0 "Continue",
16559 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
16560 operators. All new ACPI 2.0 operators are now implemented in both
16561 the ASL compiler and the AML interpreter. The only remaining ACPI
16562 2.0 task is support for the String data type in the DerefOf
16563 operator. Fixed a problem with AcquireMutex where the status code
16564 was lost if the caller had to actually wait for the mutex.
16566 Increased the maximum ASL Field size from 64K bits to 4G bits.
16568 Completed implementation of the external Global Lock interfaces --
16569 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
16570 Handler parameters were added.
16572 Completed another pass at removing warnings and issues when
16573 compiling with 64-bit compilers. The code now compiles cleanly
16574 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
16575 add and subtract (diff) macros have changed considerably.
16578 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
16579 64-bit platforms, 32-bits on all others. This type is used
16580 wherever memory allocation and/or the C sizeof() operator is used,
16581 and affects the OSL memory allocation interfaces AcpiOsAllocate
16582 and AcpiOsCallocate.
16584 Implemented sticky user breakpoints in the AML debugger.
16586 Code and Data Size: Current core subsystem library sizes are shown
16587 below. These are the code and data sizes for the acpica.lib
16588 produced by the Microsoft Visual C++ 6.0 compiler, and these
16589 values do not include any ACPI driver or OSPM code. The debug
16590 version of the code includes the debug output trace mechanism and
16591 has a larger code and data size. Note that these values will vary
16592 depending on the efficiency of the compiler and the compiler
16593 options used during generation.
16595 Previous Release (12_05_01)
16596 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
16597 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
16599 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
16600 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
16602 3) ASL Compiler, version X2034:
16604 Now checks for (and generates an error if detected) the use of a
16605 Break or Continue statement without an enclosing While statement.
16608 Successfully generated the compiler with the Intel 64-bit C
16611 ----------------------------------------
16612 Summary of changes for this label: 12_05_01
16614 1) ACPI CA Core Subsystem:
16616 The ACPI 2.0 CopyObject operator is fully implemented. This
16617 operator creates a new copy of an object (and is also used to
16618 bypass the "implicit conversion" mechanism of the Store operator.)
16620 The ACPI 2.0 semantics for the SizeOf operator are fully
16621 implemented. The change is that performing a SizeOf on a
16622 reference object causes an automatic dereference of the object to
16623 tha actual value before the size is evaluated. This behavior was
16624 undefined in ACPI 1.0.
16626 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
16627 have been implemented. The interrupt polarity and mode are now
16630 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
16631 appearing in Package objects were not properly converted to
16632 integers when the internal Package was converted to an external
16633 object (via the AcpiEvaluateObject interface.)
16635 Fixed a problem with the namespace object deletion mechanism for
16636 objects created by control methods. There were two parts to this
16637 problem: 1) Objects created during the initialization phase method
16638 parse were not being deleted, and 2) The object owner ID mechanism
16639 to track objects was broken.
16641 Fixed a problem where the use of the ASL Scope operator within a
16642 control method would result in an invalid opcode exception.
16644 Fixed a problem introduced in the previous label where the buffer
16645 length required for the _PRT structure was not being returned
16648 Code and Data Size: Current core subsystem library sizes are shown
16649 below. These are the code and data sizes for the acpica.lib
16650 produced by the Microsoft Visual C++ 6.0 compiler, and these
16651 values do not include any ACPI driver or OSPM code. The debug
16652 version of the code includes the debug output trace mechanism and
16653 has a larger code and data size. Note that these values will vary
16654 depending on the efficiency of the compiler and the compiler
16655 options used during generation.
16657 Previous Release (11_20_01)
16658 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
16659 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
16662 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
16663 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
16667 Updated all files to apply cleanly against 2.4.16.
16669 Added basic PCI Interrupt Routing Table (PRT) support for IA32
16670 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
16671 version supports both static and dyanmic PRT entries, but dynamic
16672 entries are treated as if they were static (not yet
16673 reconfigurable). Architecture- specific code to use this data is
16674 absent on IA32 but should be available shortly.
16676 Changed the initialization sequence to start the ACPI interpreter
16677 (acpi_init) prior to initialization of the PCI driver (pci_init)
16678 in init/main.c. This ordering is required to support PRT and
16679 facilitate other (future) enhancement. A side effect is that the
16680 ACPI bus driver and certain device drivers can no longer be loaded
16683 Modified the 'make menuconfig' options to allow PCI Interrupt
16684 Routing support to be included without the ACPI Bus and other
16687 3) ASL Compiler, version X2033:
16689 Fixed some issues with the use of the new CopyObject and
16690 DataTableRegion operators. Both are fully functional.
16692 ----------------------------------------
16693 Summary of changes for this label: 11_20_01
16695 20 November 2001. Summary of changes for this release.
16697 1) ACPI CA Core Subsystem:
16699 Updated Index support to match ACPI 2.0 semantics. Storing a
16700 Integer, String, or Buffer to an Index of a Buffer will store only
16701 the least-significant byte of the source to the Indexed buffer
16702 byte. Multiple writes are not performed.
16704 Fixed a problem where the access type used in an AccessAs ASL
16705 operator was not recorded correctly into the field object.
16707 Fixed a problem where ASL Event objects were created in a
16708 signalled state. Events are now created in an unsignalled state.
16710 The internal object cache is now purged after table loading and
16711 initialization to reduce the use of dynamic kernel memory -- on
16712 the assumption that object use is greatest during the parse phase
16713 of the entire table (versus the run-time use of individual control
16716 ACPI 2.0 variable-length packages are now fully operational.
16718 Code and Data Size: Code and Data optimizations have permitted new
16719 feature development with an actual reduction in the library size.
16720 Current core subsystem library sizes are shown below. These are
16721 the code and data sizes for the acpica.lib produced by the
16722 Microsoft Visual C++ 6.0 compiler, and these values do not include
16723 any ACPI driver or OSPM code. The debug version of the code
16724 includes the debug output trace mechanism and has a larger code
16725 and data size. Note that these values will vary depending on the
16726 efficiency of the compiler and the compiler options used during
16729 Previous Release (11_09_01):
16730 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
16731 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
16734 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
16735 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
16739 Enhanced the ACPI boot-time initialization code to allow the use
16740 of Local APIC tables for processor enumeration on IA-32, and to
16741 pave the way for a fully MPS-free boot (on SMP systems) in the
16742 near future. This functionality replaces
16743 arch/i386/kernel/acpitables.c, which was introduced in an earlier
16744 2.4.15-preX release. To enable this feature you must add
16745 "acpi_boot=on" to the kernel command line -- see the help entry
16746 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
16749 Restructured the configuration options to allow boot-time table
16750 parsing support without inclusion of the ACPI Interpreter (and
16753 NOTE: This release does not include fixes for the reported events,
16754 power-down, and thermal passive cooling issues (coming soon).
16758 Added additional typechecking for Fields within restricted access
16759 Operation Regions. All fields within EC and CMOS regions must be
16760 declared with ByteAcc. All fields withing SMBus regions must be
16761 declared with the BufferAcc access type.
16763 Fixed a problem where the listing file output of control methods
16764 no longer interleaved the actual AML code with the ASL source
16770 ----------------------------------------
16771 Summary of changes for this label: 11_09_01
16773 1) ACPI CA Core Subsystem:
16775 Implemented ACPI 2.0-defined support for writes to fields with a
16776 Buffer, String, or Integer source operand that is smaller than the
16777 target field. In these cases, the source operand is zero-extended
16778 to fill the target field.
16780 Fixed a problem where a Field starting bit offset (within the
16781 parent operation region) was calculated incorrectly if the
16783 alignment of the field differed from the access width. This
16784 affected CreateWordField, CreateDwordField, CreateQwordField, and
16785 possibly other fields that use the "AccessAny" keyword.
16787 Fixed a problem introduced in the 11_02_01 release where indirect
16788 stores through method arguments did not operate correctly.
16792 Implemented boot-time ACPI table parsing support
16793 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
16794 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
16795 legacy BIOS interfaces (e.g. MPS) for the configuration of system
16796 processors, memory, and interrupts during setup_arch(). Note that
16797 this patch does not include the required architecture-specific
16798 changes required to apply this information -- subsequent patches
16799 will be posted for both IA32 and IA64 to achieve this.
16801 Added low-level sleep support for IA32 platforms, courtesy of Pat
16802 Mochel. This allows IA32 systems to transition to/from various
16803 sleeping states (e.g. S1, S3), although the lack of a centralized
16804 driver model and power-manageable drivers will prevent its
16805 (successful) use on most systems.
16807 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
16808 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
16809 tables" option, etc.
16811 Increased the default timeout for the EC driver from 1ms to 10ms
16812 (1000 cycles of 10us) to try to address AE_TIME errors during EC
16815 ----------------------------------------
16816 Summary of changes for this label: 11_02_01
16818 1) ACPI CA Core Subsystem:
16820 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
16821 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
16824 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
16825 changes to support ACPI 2.0 Qword field access. Read/Write
16826 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
16827 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
16828 the value parameter for the address space handler interface is now
16829 an ACPI_INTEGER. OSL implementations of these interfaces must now
16830 handle the case where the Width parameter is 64.
16832 Index Fields: Fixed a problem where unaligned bit assembly and
16833 disassembly for IndexFields was not supported correctly.
16835 Index and Bank Fields: Nested Index and Bank Fields are now
16836 supported. During field access, a check is performed to ensure
16837 that the value written to an Index or Bank register is not out of
16838 the range of the register. The Index (or Bank) register is
16839 written before each access to the field data. Future support will
16840 include allowing individual IndexFields to be wider than the
16841 DataRegister width.
16843 Fields: Fixed a problem where the AML interpreter was incorrectly
16844 attempting to write beyond the end of a Field/OpRegion. This was
16845 a boundary case that occurred when a DWORD field was written to a
16846 BYTE access OpRegion, forcing multiple writes and causing the
16847 interpreter to write one datum too many.
16849 Fields: Fixed a problem with Field/OpRegion access where the
16850 starting bit address of a field was incorrectly calculated if the
16851 current access type was wider than a byte (WordAcc, DwordAcc, or
16854 Fields: Fixed a problem where forward references to individual
16855 FieldUnits (individual Field names within a Field definition) were
16856 not resolved during the AML table load.
16858 Fields: Fixed a problem where forward references from a Field
16859 definition to the parent Operation Region definition were not
16860 resolved during the AML table load.
16862 Fields: Duplicate FieldUnit names within a scope are now detected
16863 during AML table load.
16865 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
16866 returned an incorrect name for the root node.
16868 Code and Data Size: Code and Data optimizations have permitted new
16869 feature development with an actual reduction in the library size.
16870 Current core subsystem library sizes are shown below. These are
16871 the code and data sizes for the acpica.lib produced by the
16872 Microsoft Visual C++ 6.0 compiler, and these values do not include
16873 any ACPI driver or OSPM code. The debug version of the code
16874 includes the debug output trace mechanism and has a larger code
16875 and data size. Note that these values will vary depending on the
16876 efficiency of the compiler and the compiler options used during
16879 Previous Release (10_18_01):
16880 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
16881 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
16884 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
16885 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
16889 Improved /proc processor output (Pavel Machek) Re-added
16890 MODULE_LICENSE("GPL") to all modules.
16892 3) ASL Compiler version X2030:
16894 Duplicate FieldUnit names within a scope are now detected and
16899 Programmer Reference updated to reflect OSL and address space
16900 handler interface changes described above.
16902 ----------------------------------------
16903 Summary of changes for this label: 10_18_01
16905 ACPI CA Core Subsystem:
16907 Fixed a problem with the internal object reference count mechanism
16908 that occasionally caused premature object deletion. This resolves
16909 all of the outstanding problem reports where an object is deleted
16910 in the middle of an interpreter evaluation. Although this problem
16911 only showed up in rather obscure cases, the solution to the
16912 problem involved an adjustment of all reference counts involving
16913 objects attached to namespace nodes.
16915 Fixed a problem with Field support in the interpreter where
16916 writing to an aligned field whose length is an exact multiple (2
16917 or greater) of the field access granularity would cause an attempt
16918 to write beyond the end of the field.
16920 The top level AML opcode execution functions within the
16921 interpreter have been renamed with a more meaningful and
16922 consistent naming convention. The modules exmonad.c and
16923 exdyadic.c were eliminated. New modules are exoparg1.c,
16924 exoparg2.c, exoparg3.c, and exoparg6.c.
16926 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
16928 Fixed a problem where the AML debugger was causing some internal
16929 objects to not be deleted during subsystem termination.
16931 Fixed a problem with the external AcpiEvaluateObject interface
16932 where the subsystem would fault if the named object to be
16933 evaluated refered to a constant such as Zero, Ones, etc.
16935 Fixed a problem with IndexFields and BankFields where the
16936 subsystem would fault if the index, data, or bank registers were
16937 not defined in the same scope as the field itself.
16939 Added printf format string checking for compilers that support
16940 this feature. Corrected more than 50 instances of issues with
16941 format specifiers within invocations of ACPI_DEBUG_PRINT
16942 throughout the core subsystem code.
16944 The ASL "Revision" operator now returns the ACPI support level
16945 implemented in the core - the value "2" since the ACPI 2.0 support
16946 is more than 50% implemented.
16948 Enhanced the output of the AML debugger "dump namespace" command
16949 to output in a more human-readable form.
16951 Current core subsystem library code sizes are shown below. These
16953 are the code and data sizes for the acpica.lib produced by the
16954 Microsoft Visual C++ 6.0 compiler, and these values do not include
16955 any ACPI driver or OSPM code. The debug version of the code
16956 includes the full debug trace mechanism -- leading to a much
16958 larger code and data size. Note that these values will vary
16959 depending on the efficiency of the compiler and the compiler
16960 options used during generation.
16962 Previous Label (09_20_01):
16963 Non-Debug Version: 65K Code, 5K Data, 70K Total
16964 Debug Version: 138K Code, 58K Data, 196K Total
16968 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
16969 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
16973 Implemented a "Bad BIOS Blacklist" to track machines that have
16974 known ASL/AML problems.
16976 Enhanced the /proc interface for the thermal zone driver and added
16977 support for _HOT (the critical suspend trip point). The 'info'
16978 file now includes threshold/policy information, and allows setting
16979 of _SCP (cooling preference) and _TZP (polling frequency) values
16980 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
16981 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
16982 preference to the passive/quiet mode (if supported by the ASL).
16984 Implemented a workaround for a gcc bug that resuted in an OOPs
16985 when loading the control method battery driver.
16987 ----------------------------------------
16988 Summary of changes for this label: 09_20_01
16990 ACPI CA Core Subsystem:
16992 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
16993 modified to allow individual GPE levels to be flagged as wake-
16994 enabled (i.e., these GPEs are to remain enabled when the platform
16997 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
16998 support wake-enabled GPEs. This means that upon entering the
16999 sleep state, all GPEs that are not wake-enabled are disabled.
17000 When leaving the sleep state, these GPEs are reenabled.
17002 A local double-precision divide/modulo module has been added to
17003 enhance portability to OS kernels where a 64-bit math library is
17004 not available. The new module is "utmath.c".
17006 Several optimizations have been made to reduce the use of CPU
17007 stack. Originally over 2K, the maximum stack usage is now below
17008 2K at 1860 bytes (1.82k)
17010 Fixed a problem with the AcpiGetFirmwareTable interface where the
17011 root table pointer was not mapped into a logical address properly.
17013 Fixed a problem where a NULL pointer was being dereferenced in the
17014 interpreter code for the ASL Notify operator.
17016 Fixed a problem where the use of the ASL Revision operator
17017 returned an error. This operator now returns the current version
17018 of the ACPI CA core subsystem.
17020 Fixed a problem where objects passed as control method parameters
17021 to AcpiEvaluateObject were always deleted at method termination.
17022 However, these objects may end up being stored into the namespace
17023 by the called method. The object reference count mechanism was
17024 applied to these objects instead of a force delete.
17026 Fixed a problem where static strings or buffers (contained in the
17027 AML code) that are declared as package elements within the ASL
17028 code could cause a fault because the interpreter would attempt to
17029 delete them. These objects are now marked with the "static
17030 object" flag to prevent any attempt to delete them.
17032 Implemented an interpreter optimization to use operands directly
17033 from the state object instead of extracting the operands to local
17034 variables. This reduces stack use and code size, and improves
17037 The module exxface.c was eliminated as it was an unnecessary extra
17040 Current core subsystem library code sizes are shown below. These
17041 are the code and data sizes for the acpica.lib produced by the
17042 Microsoft Visual C++ 6.0 compiler, and these values do not include
17043 any ACPI driver or OSPM code. The debug version of the code
17044 includes the full debug trace mechanism -- leading to a much
17045 larger code and data size. Note that these values will vary
17046 depending on the efficiency of the compiler and the compiler
17047 options used during generation.
17049 Non-Debug Version: 65K Code, 5K Data, 70K Total
17050 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
17051 Total (Previously 195K)
17055 Support for ACPI 2.0 64-bit integers has been added. All ACPI
17056 Integer objects are now 64 bits wide
17058 All Acpi data types and structures are now in lower case. Only
17059 Acpi macros are upper case for differentiation.
17063 Changes to the external interfaces as described above.
17065 ----------------------------------------
17066 Summary of changes for this label: 08_31_01
17068 ACPI CA Core Subsystem:
17070 A bug with interpreter implementation of the ASL Divide operator
17071 was found and fixed. The implicit function return value (not the
17072 explicit store operands) was returning the remainder instead of
17073 the quotient. This was a longstanding bug and it fixes several
17074 known outstanding issues on various platforms.
17076 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
17077 been further optimized for size. There are 700 invocations of the
17078 DEBUG_PRINT macro alone, so each optimization reduces the size of
17079 the debug version of the subsystem significantly.
17081 A stack trace mechanism has been implemented. The maximum stack
17082 usage is about 2K on 32-bit platforms. The debugger command "stat
17083 stack" will display the current maximum stack usage.
17085 All public symbols and global variables within the subsystem are
17086 now prefixed with the string "Acpi". This keeps all of the
17087 symbols grouped together in a kernel map, and avoids conflicts
17088 with other kernel subsystems.
17090 Most of the internal fixed lookup tables have been moved into the
17091 code segment via the const operator.
17093 Several enhancements have been made to the interpreter to both
17094 reduce the code size and improve performance.
17096 Current core subsystem library code sizes are shown below. These
17097 are the code and data sizes for the acpica.lib produced by the
17098 Microsoft Visual C++ 6.0 compiler, and these values do not include
17099 any ACPI driver or OSPM code. The debug version of the code
17100 includes the full debug trace mechanism which contains over 700
17101 invocations of the DEBUG_PRINT macro, 500 function entry macro
17102 invocations, and over 900 function exit macro invocations --
17103 leading to a much larger code and data size. Note that these
17104 values will vary depending on the efficiency of the compiler and
17105 the compiler options used during generation.
17107 Non-Debug Version: 64K Code, 5K Data, 69K Total
17108 Debug Version: 137K Code, 58K Data, 195K Total
17112 Implemented wbinvd() macro, pending a kernel-wide definition.
17114 Fixed /proc/acpi/event to handle poll() and short reads.
17116 ASL Compiler, version X2026:
17118 Fixed a problem introduced in the previous label where the AML
17120 code emitted for package objects produced packages with zero
17123 ----------------------------------------
17124 Summary of changes for this label: 08_16_01
17126 ACPI CA Core Subsystem:
17128 The following ACPI 2.0 ASL operators have been implemented in the
17129 AML interpreter (These are already supported by the Intel ASL
17130 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
17131 ToBuffer. Support for 64-bit AML constants is implemented in the
17132 AML parser, debugger, and disassembler.
17134 The internal memory tracking mechanism (leak detection code) has
17135 been upgraded to reduce the memory overhead (a separate tracking
17136 block is no longer allocated for each memory allocation), and now
17137 supports all of the internal object caches.
17139 The data structures and code for the internal object caches have
17140 been coelesced and optimized so that there is a single cache and
17141 memory list data structure and a single group of functions that
17142 implement generic cache management. This has reduced the code
17143 size in both the debug and release versions of the subsystem.
17145 The DEBUG_PRINT macro(s) have been optimized for size and replaced
17146 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
17147 different, because it generates a single call to an internal
17148 function. This results in a savings of about 90 bytes per
17149 invocation, resulting in an overall code and data savings of about
17150 16% in the debug version of the subsystem.
17154 Fixed C3 disk corruption problems and re-enabled C3 on supporting
17157 Integrated low-level sleep code by Patrick Mochel.
17159 Further tweaked source code Linuxization.
17165 Support for ACPI 2.0 variable length packages is fixed/completed.
17167 Fixed a problem where the optional length parameter for the ACPI
17168 2.0 ToString operator.
17170 Fixed multiple extraneous error messages when a syntax error is
17171 detected within the declaration line of a control method.
17173 ----------------------------------------
17174 Summary of changes for this label: 07_17_01
17176 ACPI CA Core Subsystem:
17178 Added a new interface named AcpiGetFirmwareTable to obtain any
17179 ACPI table via the ACPI signature. The interface can be called at
17180 any time during kernel initialization, even before the kernel
17181 virtual memory manager is initialized and paging is enabled. This
17182 allows kernel subsystems to obtain ACPI tables very early, even
17183 before the ACPI CA subsystem is initialized.
17185 Fixed a problem where Fields defined with the AnyAcc attribute
17186 could be resolved to the incorrect address under the following
17187 conditions: 1) the field width is larger than 8 bits and 2) the
17188 parent operation region is not defined on a DWORD boundary.
17190 Fixed a problem where the interpreter is not being locked during
17191 namespace initialization (during execution of the _INI control
17192 methods), causing an error when an attempt is made to release it
17195 ACPI 2.0 support in the AML Interpreter has begun and will be
17196 ongoing throughout the rest of this year. In this label, The Mod
17197 operator is implemented.
17199 Added a new data type to contain full PCI addresses named
17200 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
17201 and Function values.
17205 Enhanced the Linux version of the source code to change most
17206 capitalized ACPI type names to lowercase. For example, all
17207 instances of ACPI_STATUS are changed to acpi_status. This will
17208 result in a large diff, but the change is strictly cosmetic and
17209 aligns the CA code closer to the Linux coding standard.
17213 The interfaces to the PCI configuration space have been changed to
17214 add the PCI Segment number and to split the single 32-bit combined
17215 DeviceFunction field into two 16-bit fields. This was
17216 accomplished by moving the four values that define an address in
17217 PCI configuration space (segment, bus, device, and function) to
17218 the new ACPI_PCI_ID structure.
17220 The changes to the PCI configuration space interfaces led to a
17221 reexamination of the complete set of address space access
17222 interfaces for PCI, I/O, and Memory. The previously existing 18
17223 interfaces have proven difficult to maintain (any small change
17224 must be propagated across at least 6 interfaces) and do not easily
17225 allow for future expansion to 64 bits if necessary. Also, on some
17226 systems, it would not be appropriate to demultiplex the access
17227 width (8, 16, 32,or 64) before calling the OSL if the
17228 corresponding native OS interfaces contain a similar access width
17229 parameter. For these reasons, the 18 address space interfaces
17230 have been replaced by these 6 new ones:
17232 AcpiOsReadPciConfiguration
17233 AcpiOsWritePciConfiguration
17239 Added a new interface named AcpiOsGetRootPointer to allow the OSL
17240 to perform the platform and/or OS-specific actions necessary to
17241 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
17242 interface will simply call down to the CA core to perform the low-
17243 memory search for the table. On IA-64, the RSDP is obtained from
17244 EFI. Migrating this interface to the OSL allows the CA core to
17246 remain OS and platform independent.
17248 Added a new interface named AcpiOsSignal to provide a generic
17249 "function code and pointer" interface for various miscellaneous
17250 signals and notifications that must be made to the host OS. The
17251 first such signals are intended to support the ASL Fatal and
17252 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
17253 interface has been obsoleted.
17255 The definition of the AcpiFormatException interface has been
17256 changed to simplify its use. The caller no longer must supply a
17257 buffer to the call; A pointer to a const string is now returned
17258 directly. This allows the call to be easily used in printf
17259 statements, etc. since the caller does not have to manage a local
17263 ASL Compiler, Version X2025:
17265 The ACPI 2.0 Switch/Case/Default operators have been implemented
17266 and are fully functional. They will work with all ACPI 1.0
17267 interpreters, since the operators are simply translated to If/Else
17270 The ACPI 2.0 ElseIf operator is implemented and will also work
17271 with 1.0 interpreters, for the same reason.
17273 Implemented support for ACPI 2.0 variable-length packages. These
17274 packages have a separate opcode, and their size is determined by
17275 the interpreter at run-time.
17277 Documentation The ACPI CA Programmer Reference has been updated to
17278 reflect the new interfaces and changes to existing interfaces.
17280 ------------------------------------------
17281 Summary of changes for this label: 06_15_01
17283 ACPI CA Core Subsystem:
17285 Fixed a problem where a DWORD-accessed field within a Buffer
17286 object would get its byte address inadvertently rounded down to
17287 the nearest DWORD. Buffers are always Byte-accessible.
17289 ASL Compiler, version X2024:
17291 Fixed a problem where the Switch() operator would either fault or
17292 hang the compiler. Note however, that the AML code for this ACPI
17293 2.0 operator is not yet implemented.
17295 Compiler uses the new AcpiOsGetTimer interface to obtain compile
17298 Implementation of the CreateField operator automatically converts
17299 a reference to a named field within a resource descriptor from a
17300 byte offset to a bit offset if required.
17302 Added some missing named fields from the resource descriptor
17303 support. These are the names that are automatically created by the
17304 compiler to reference fields within a descriptor. They are only
17305 valid at compile time and are not passed through to the AML
17308 Resource descriptor named fields are now typed as Integers and
17309 subject to compile-time typechecking when used in expressions.
17311 ------------------------------------------
17312 Summary of changes for this label: 05_18_01
17314 ACPI CA Core Subsystem:
17316 Fixed a couple of problems in the Field support code where bits
17317 from adjacent fields could be returned along with the proper field
17318 bits. Restructured the field support code to improve performance,
17319 readability and maintainability.
17321 New DEBUG_PRINTP macro automatically inserts the procedure name
17322 into the output, saving hundreds of copies of procedure name
17323 strings within the source, shrinking the memory footprint of the
17324 debug version of the core subsystem.
17326 Source Code Structure:
17328 The source code directory tree was restructured to reflect the
17329 current organization of the component architecture. Some files
17330 and directories have been moved and/or renamed.
17334 Fixed leaking kacpidpc processes.
17336 Fixed queueing event data even when /proc/acpi/event is not
17339 ASL Compiler, version X2020:
17341 Memory allocation performance enhancement - over 24X compile time
17342 improvement on large ASL files. Parse nodes and namestring
17343 buffers are now allocated from a large internal compiler buffer.
17345 The temporary .SRC file is deleted unless the "-s" option is
17348 The "-d" debug output option now sends all output to the .DBG file
17349 instead of the console.
17351 "External" second parameter is now optional
17353 "ElseIf" syntax now properly allows the predicate
17355 Last operand to "Load" now recognized as a Target operand
17357 Debug object can now be used anywhere as a normal object.
17359 ResourceTemplate now returns an object of type BUFFER
17361 EISAID now returns an object of type INTEGER
17363 "Index" now works with a STRING operand
17365 "LoadTable" now accepts optional parameters
17367 "ToString" length parameter is now optional
17369 "Interrupt (ResourceType," parse error fixed.
17371 "Register" with a user-defined region space parse error fixed
17373 Escaped backslash at the end of a string ("\\") scan/parse error
17376 "Revision" is now an object of type INTEGER.
17380 ------------------------------------------
17381 Summary of changes for this label: 05_02_01
17385 /proc/acpi/event now blocks properly.
17387 Removed /proc/sys/acpi. You can still dump your DSDT from
17390 ACPI CA Core Subsystem:
17392 Fixed a problem introduced in the previous label where some of the
17393 "small" resource descriptor types were not recognized.
17395 Improved error messages for the case where an ASL Field is outside
17396 the range of the parent operation region.
17398 ASL Compiler, version X2018:
17401 Added error detection for ASL Fields that extend beyond the length
17402 of the parent operation region (only if the length of the region
17403 is known at compile time.) This includes fields that have a
17404 minimum access width that is smaller than the parent region, and
17405 individual field units that are partially or entirely beyond the
17406 extent of the parent.
17410 ------------------------------------------
17411 Summary of changes for this label: 04_27_01
17413 ACPI CA Core Subsystem:
17415 Fixed a problem where the namespace mutex could be released at the
17416 wrong time during execution of AcpiRemoveAddressSpaceHandler.
17418 Added optional thread ID output for debug traces, to simplify
17419 debugging of multiple threads. Added context switch notification
17420 when the debug code realizes that a different thread is now
17421 executing ACPI code.
17423 Some additional external data types have been prefixed with the
17424 string "ACPI_" for consistency. This may effect existing code.
17425 The data types affected are the external callback typedefs - e.g.,
17427 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
17431 Fixed an issue with the OSL semaphore implementation where a
17432 thread was waking up with an error from receiving a SIGCHLD
17435 Linux version of ACPI CA now uses the system C library for string
17436 manipulation routines instead of a local implementation.
17438 Cleaned up comments and removed TBDs.
17440 ASL Compiler, version X2017:
17442 Enhanced error detection and reporting for all file I/O
17447 Programmer Reference updated to version 1.06.
17451 ------------------------------------------
17452 Summary of changes for this label: 04_13_01
17454 ACPI CA Core Subsystem:
17456 Restructured support for BufferFields and RegionFields.
17457 BankFields support is now fully operational. All known 32-bit
17458 limitations on field sizes have been removed. Both BufferFields
17459 and (Operation) RegionFields are now supported by the same field
17462 Resource support now supports QWORD address and IO resources. The
17463 16/32/64 bit address structures and the Extended IRQ structure
17464 have been changed to properly handle Source Resource strings.
17466 A ThreadId of -1 is now used to indicate a "mutex not acquired"
17467 condition internally and must never be returned by AcpiOsThreadId.
17468 This reserved value was changed from 0 since Unix systems allow a
17473 Driver code reorganized to enhance portability
17475 Added a kernel configuration option to control ACPI_DEBUG
17477 Fixed the EC driver to honor _GLK.
17479 ASL Compiler, version X2016:
17481 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
17482 address space was set to 0, not 0x7f as it should be.
17484 ------------------------------------------
17485 Summary of changes for this label: 03_13_01
17487 ACPI CA Core Subsystem:
17489 During ACPI initialization, the _SB_._INI method is now run if
17492 Notify handler fix - notifies are deferred until the parent method
17493 completes execution. This fixes the "mutex already acquired"
17494 issue seen occasionally.
17496 Part of the "implicit conversion" rules in ACPI 2.0 have been
17497 found to cause compatibility problems with existing ASL/AML. The
17498 convert "result-to-target-type" implementation has been removed
17499 for stores to method Args and Locals. Source operand conversion
17500 is still fully implemented. Possible changes to ACPI 2.0
17501 specification pending.
17503 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
17506 Fix for compiler warnings for 64-bit compiles.
17510 /proc output aligned for easier parsing.
17512 Release-version compile problem fixed.
17514 New kernel configuration options documented in Configure.help.
17516 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
17521 Power resource driver integrated with bus manager.
17523 Fixed kernel fault during active cooling for thermal zones.
17527 The source code tree has been restructured.
17531 ------------------------------------------
17532 Summary of changes for this label: 03_02_01
17534 Linux OS Services Layer (OSL):
17536 Major revision of all Linux-specific code.
17538 Modularized all ACPI-specific drivers.
17540 Added new thermal zone and power resource drivers.
17542 Revamped /proc interface (new functionality is under /proc/acpi).
17544 New kernel configuration options.
17546 Linux known issues:
17548 New kernel configuration options not documented in Configure.help
17552 Module dependencies not currently implemented. If used, they
17553 should be loaded in this order: busmgr, power, ec, system,
17554 processor, battery, ac_adapter, button, thermal.
17556 Modules will not load if CONFIG_MODVERSION is set.
17558 IBM 600E - entering S5 may reboot instead of shutting down.
17560 IBM 600E - Sleep button may generate "Invalid <NULL> context"
17563 Some systems may fail with "execution mutex already acquired"
17566 ACPI CA Core Subsystem:
17568 Added a new OSL Interface, AcpiOsGetThreadId. This was required
17569 for the deadlock detection code. Defined to return a non-zero, 32-
17570 bit thread ID for the currently executing thread. May be a non-
17571 zero constant integer on single-thread systems.
17573 Implemented deadlock detection for internal subsystem mutexes. We
17574 may add conditional compilation for this code (debug only) later.
17576 ASL/AML Mutex object semantics are now fully supported. This
17577 includes multiple acquires/releases by owner and support for the
17579 Mutex SyncLevel parameter.
17581 A new "Force Release" mechanism automatically frees all ASL
17582 Mutexes that have been acquired but not released when a thread
17583 exits the interpreter. This forces conformance to the ACPI spec
17584 ("All mutexes must be released when an invocation exits") and
17585 prevents deadlocked ASL threads. This mechanism can be expanded
17586 (later) to monitor other resource acquisitions if OEM ASL code
17587 continues to misbehave (which it will).
17589 Several new ACPI exception codes have been added for the Mutex
17592 Recursive method calls are now allowed and supported (the ACPI
17593 spec does in fact allow recursive method calls.) The number of
17594 recursive calls is subject to the restrictions imposed by the
17595 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
17598 Implemented support for the SyncLevel parameter for control
17599 methods (ACPI 2.0 feature)
17601 Fixed a deadlock problem when multiple threads attempted to use
17604 Fixed a problem where the string length of a String package
17605 element was not always set in a package returned from
17606 AcpiEvaluateObject.
17608 Fixed a problem where the length of a String package element was
17609 not always included in the length of the overall package returned
17610 from AcpiEvaluateObject.
17612 Added external interfaces (Acpi*) to the ACPI debug memory
17613 manager. This manager keeps a list of all outstanding
17614 allocations, and can therefore detect memory leaks and attempts to
17615 free memory blocks more than once. Useful for code such as the
17616 power manager, etc. May not be appropriate for device drivers.
17617 Performance with the debug code enabled is slow.
17619 The ACPI Global Lock is now an optional hardware element.
17621 ASL Compiler Version X2015:
17623 Integrated changes to allow the compiler to be generated on
17624 multiple platforms.
17626 Linux makefile added to generate the compiler on Linux
17630 All platform-specific headers have been moved to their own
17631 subdirectory, Include/Platform.
17633 New source file added, Interpreter/ammutex.c
17635 New header file, Include/acstruct.h
17639 The programmer reference has been updated for the following new
17640 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
17642 ------------------------------------------
17643 Summary of changes for this label: 02_08_01
17645 Core ACPI CA Subsystem: Fixed a problem where an error was
17646 incorrectly returned if the return resource buffer was larger than
17647 the actual data (in the resource interfaces).
17649 References to named objects within packages are resolved to the
17651 full pathname string before packages are returned directly (via
17652 the AcpiEvaluateObject interface) or indirectly via the resource
17655 Linux OS Services Layer (OSL):
17657 Improved /proc battery interface.
17660 Added C-state debugging output and other miscellaneous fixes.
17662 ASL Compiler Version X2014:
17664 All defined method arguments can now be used as local variables,
17665 including the ones that are not actually passed in as parameters.
17666 The compiler tracks initialization of the arguments and issues an
17667 exception if they are used without prior assignment (just like
17670 The -o option now specifies a filename prefix that is used for all
17671 output files, including the AML output file. Otherwise, the
17672 default behavior is as follows: 1) the AML goes to the file
17673 specified in the DSDT. 2) all other output files use the input
17674 source filename as the base.
17676 ------------------------------------------
17677 Summary of changes for this label: 01_25_01
17679 Core ACPI CA Subsystem: Restructured the implementation of object
17680 store support within the interpreter. This includes support for
17681 the Store operator as well as any ASL operators that include a
17684 Partially implemented support for Implicit Result-to-Target
17685 conversion. This is when a result object is converted on the fly
17686 to the type of an existing target object. Completion of this
17687 support is pending further analysis of the ACPI specification
17688 concerning this matter.
17690 CPU-specific code has been removed from the subsystem (hardware
17693 New Power Management Timer functions added
17695 Linux OS Services Layer (OSL): Moved system state transition code
17696 to the core, fixed it, and modified Linux OSL accordingly.
17698 Fixed C2 and C3 latency calculations.
17701 We no longer use the compilation date for the version message on
17702 initialization, but retrieve the version from AcpiGetSystemInfo().
17704 Incorporated for fix Sony VAIO machines.
17706 Documentation: The Programmer Reference has been updated and
17710 ASL Compiler: Version X2013: Fixed a problem where the line
17711 numbering and error reporting could get out of sync in the
17712 presence of multiple include files.
17714 ------------------------------------------
17715 Summary of changes for this label: 01_15_01
17717 Core ACPI CA Subsystem:
17719 Implemented support for type conversions in the execution of the
17720 ASL Concatenate operator (The second operand is converted to
17721 match the type of the first operand before concatenation.)
17723 Support for implicit source operand conversion is partially
17724 implemented. The ASL source operand types Integer, Buffer, and
17725 String are freely interchangeable for most ASL operators and are
17726 converted by the interpreter on the fly as required. Implicit
17727 Target operand conversion (where the result is converted to the
17728 target type before storing) is not yet implemented.
17730 Support for 32-bit and 64-bit BCD integers is implemented.
17732 Problem fixed where a field read on an aligned field could cause a
17733 read past the end of the field.
17735 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
17736 does not return a value, but the caller expects one. (The ASL
17737 compiler flags this as a warning.)
17742 1. Static typechecking of all operands is implemented. This
17743 prevents the use of invalid objects (such as using a Package where
17744 an Integer is required) at compile time instead of at interpreter
17746 2. The ASL source line is printed with ALL errors and warnings.
17747 3. Bug fix for source EOF without final linefeed.
17748 4. Debug option is split into a parse trace and a namespace trace.
17749 5. Namespace output option (-n) includes initial values for
17750 integers and strings.
17751 6. Parse-only option added for quick syntax checking.
17752 7. Compiler checks for duplicate ACPI name declarations
17755 1. Relaxed typechecking to allow interchangeability between
17756 strings, integers, and buffers. These types are now converted by
17757 the interpreter at runtime.
17758 2. Compiler reports time taken by each internal subsystem in the
17762 ------------------------------------------
17763 Summary of changes for this label: 12_14_00
17767 This is the first official release of the compiler. Since the
17768 compiler requires elements of the Core Subsystem, this label
17769 synchronizes everything.
17771 ------------------------------------------
17772 Summary of changes for this label: 12_08_00
17775 Fixed a problem where named references within the ASL definition
17776 of both OperationRegions and CreateXXXFields did not work
17777 properly. The symptom was an AE_AML_OPERAND_TYPE during
17778 initialization of the region/field. This is similar (but not
17779 related internally) to the problem that was fixed in the last
17782 Implemented both 32-bit and 64-bit support for the BCD ASL
17783 functions ToBCD and FromBCD.
17785 Updated all legal headers to include "2000" in the copyright
17788 ------------------------------------------
17789 Summary of changes for this label: 12_01_00
17791 Fixed a problem where method invocations within the ASL definition
17792 of both OperationRegions and CreateXXXFields did not work
17793 properly. The symptom was an AE_AML_OPERAND_TYPE during
17794 initialization of the region/field:
17796 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
17797 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
17800 Fixed a problem where operators with more than one nested
17801 subexpression would fail. The symptoms were varied, by mostly
17802 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
17803 problem that has gone unnoticed until now.
17805 Subtract (Add (1,2), Multiply (3,4))
17807 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
17808 previous build (The prefix part of a relative path was handled
17811 Fixed a problem where Operation Region initialization failed if
17812 the operation region name was a "namepath" instead of a simple
17813 "nameseg". Symptom was an AE_NO_OPERAND error.
17815 Fixed a problem where an assignment to a local variable via the
17816 indirect RefOf mechanism only worked for the first such
17817 assignment. Subsequent assignments were ignored.
17819 ------------------------------------------
17820 Summary of changes for this label: 11_15_00
17822 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
17823 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
17824 the AML interpreter does NOT have support for the new 2.0 ASL
17825 grammar terms at this time.
17827 All ACPI hardware access is via the GAS structures in the ACPI 2.0
17830 All physical memory addresses across all platforms are now 64 bits
17831 wide. Logical address width remains dependent on the platform
17834 AcpiOsMapMemory interface changed to a 64-bit physical address.
17836 The AML interpreter integer size is now 64 bits, as per the ACPI
17839 For backwards compatibility with ACPI 1.0, ACPI tables with a
17840 revision number less than 2 use 32-bit integers only.
17842 Fixed a problem where the evaluation of OpRegion operands did not
17843 always resolve them to numbers properly.
17845 ------------------------------------------
17846 Summary of changes for this label: 10_20_00
17848 Fix for CBN_._STA issue. This fix will allow correct access to
17849 CBN_ OpRegions when the _STA returns 0x8.
17851 Support to convert ACPI constants (Ones, Zeros, One) to actual
17852 values before a package object is returned
17854 Fix for method call as predicate to if/while construct causing
17855 incorrect if/while behavior
17857 Fix for Else block package lengths sometimes calculated wrong (if
17860 Fix for Processor object length field, was always zero
17862 Table load abort if FACP sanity check fails
17864 Fix for problem with Scope(name) if name already exists
17866 Warning emitted if a named object referenced cannot be found
17867 (resolved) during method execution.
17873 ------------------------------------------
17874 Summary of changes for this label: 9_29_00
17876 New table initialization interfaces: AcpiInitializeSubsystem no
17877 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
17878 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
17879 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
17882 Note: These interface changes require changes to all existing OSDs
17884 The PCI_Config default address space handler is always installed
17885 at the root namespace object.
17887 -------------------------------------------
17888 Summary of changes for this label: 09_15_00
17890 The new initialization architecture is implemented. New
17891 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
17892 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
17894 (Namespace is automatically loaded when a table is loaded)
17896 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
17897 52 bytes to 32 bytes. There is usually one of these for every
17898 namespace object, so the memory savings is significant.
17900 Implemented just-in-time evaluation of the CreateField operators.
17902 Bug fixes for IA-64 support have been integrated.
17904 Additional code review comments have been implemented
17906 The so-called "third pass parse" has been replaced by a final walk
17907 through the namespace to initialize all operation regions (address
17908 spaces) and fields that have not yet been initialized during the
17909 execution of the various _INI and REG methods.
17911 New file - namespace/nsinit.c
17913 -------------------------------------------
17914 Summary of changes for this label: 09_01_00
17916 Namespace manager data structures have been reworked to change the
17917 primary object from a table to a single object. This has
17918 resulted in dynamic memory savings of 3X within the namespace and
17919 2X overall in the ACPI CA subsystem.
17921 Fixed problem where the call to AcpiEvFindPciRootBuses was
17922 inadvertently left commented out.
17924 Reduced the warning count when generating the source with the GCC
17927 Revision numbers added to each module header showing the
17928 SourceSafe version of the file. Please refer to this version
17929 number when giving us feedback or comments on individual modules.
17931 The main object types within the subsystem have been renamed to
17932 clarify their purpose:
17934 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
17935 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
17936 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
17938 NOTE: no changes to the initialization sequence are included in
17941 -------------------------------------------
17942 Summary of changes for this label: 08_23_00
17944 Fixed problem where TerminateControlMethod was being called
17945 multiple times per method
17947 Fixed debugger problem where single stepping caused a semaphore to
17950 Improved performance through additional parse object caching -
17951 added ACPI_EXTENDED_OP type
17953 -------------------------------------------
17954 Summary of changes for this label: 08_10_00
17956 Parser/Interpreter integration: Eliminated the creation of
17957 complete parse trees for ACPI tables and control methods.
17958 Instead, parse subtrees are created and then deleted as soon as
17959 they are processed (Either entered into the namespace or executed
17960 by the interpreter). This reduces the use of dynamic kernel
17961 memory significantly. (about 10X)
17963 Exception codes broken into classes and renumbered. Be sure to
17964 recompile all code that includes acexcep.h. Hopefully we won't
17965 have to renumber the codes again now that they are split into
17966 classes (environment, programmer, AML code, ACPI table, and
17969 Fixed some additional alignment issues in the Resource Manager
17972 Implemented semaphore tracking in the AcpiExec utility, and fixed
17973 several places where mutexes/semaphores were being unlocked
17974 without a corresponding lock operation. There are no known
17975 semaphore or mutex "leaks" at this time.
17977 Fixed the case where an ASL Return operator is used to return an
17980 -------------------------------------------
17981 Summary of changes for this label: 07_28_00
17983 Fixed a problem with the way addresses were calculated in
17984 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
17985 manifested itself when a Field was created with WordAccess or
17986 DwordAccess, but the field unit defined within the Field was less
17988 than a Word or Dword.
17990 Fixed a problem in AmlDumpOperands() module's loop to pull
17991 operands off of the operand stack to display information. The
17992 problem manifested itself as a TLB error on 64-bit systems when
17993 accessing an operand stack with two or more operands.
17995 Fixed a problem with the PCI configuration space handlers where
17996 context was getting confused between accesses. This required a
17997 change to the generic address space handler and address space
17998 setup definitions. Handlers now get both a global handler context
17999 (this is the one passed in by the user when executing
18000 AcpiInstallAddressSpaceHandler() and a specific region context
18001 that is unique to each region (For example, the _ADR, _SEG and
18002 _BBN values associated with a specific region). The generic
18003 function definitions have changed to the following:
18005 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
18006 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
18007 *HandlerContext, // This used to be void *Context void
18008 *RegionContext); // This is an additional parameter
18010 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
18011 RegionHandle, UINT32 Function, void *HandlerContext, void
18012 **RegionContext); // This used to be **ReturnContext
18014 -------------------------------------------
18015 Summary of changes for this label: 07_21_00
18017 Major file consolidation and rename. All files within the
18018 interpreter have been renamed as well as most header files. This
18019 was done to prevent collisions with existing files in the host
18020 OSs -- filenames such as "config.h" and "global.h" seem to be
18021 quite common. The VC project files have been updated. All
18022 makefiles will require modification.
18024 The parser/interpreter integration continues in Phase 5 with the
18025 implementation of a complete 2-pass parse (the AML is parsed
18026 twice) for each table; This avoids the construction of a huge
18027 parse tree and therefore reduces the amount of dynamic memory
18028 required by the subsystem. Greater use of the parse object cache
18029 means that performance is unaffected.
18031 Many comments from the two code reviews have been rolled in.
18033 The 64-bit alignment support is complete.
18035 -------------------------------------------
18036 Summary of changes for this label: 06_30_00
18038 With a nod and a tip of the hat to the technology of yesteryear,
18039 we've added support in the source code for 80 column output
18040 devices. The code is now mostly constrained to 80 columns or
18041 less to support environments and editors that 1) cannot display
18042 or print more than 80 characters on a single line, and 2) cannot
18043 disable line wrapping.
18045 A major restructuring of the namespace data structure has been
18046 completed. The result is 1) cleaner and more
18047 understandable/maintainable code, and 2) a significant reduction
18048 in the dynamic memory requirement for each named ACPI object
18051 -------------------------------------------
18052 Summary of changes for this label: 06_23_00
18054 Linux support has been added. In order to obtain approval to get
18055 the ACPI CA subsystem into the Linux kernel, we've had to make
18056 quite a few changes to the base subsystem that will affect all
18057 users (all the changes are generic and OS- independent). The
18058 effects of these global changes have been somewhat far reaching.
18059 Files have been merged and/or renamed and interfaces have been
18060 renamed. The major changes are described below.
18062 Osd* interfaces renamed to AcpiOs* to eliminate namespace
18063 pollution/confusion within our target kernels. All OSD
18064 interfaces must be modified to match the new naming convention.
18066 Files merged across the subsystem. A number of the smaller source
18067 and header files have been merged to reduce the file count and
18068 increase the density of the existing files. There are too many
18069 to list here. In general, makefiles that call out individual
18070 files will require rebuilding.
18072 Interpreter files renamed. All interpreter files now have the
18073 prefix am* instead of ie* and is*.
18075 Header files renamed: The acapi.h file is now acpixf.h. The
18076 acpiosd.h file is now acpiosxf.h. We are removing references to
18077 the acronym "API" since it is somewhat windowsy. The new name is
18078 "external interface" or xface or xf in the filenames.j
18081 All manifest constants have been forced to upper case (some were
18082 mixed case.) Also, the string "ACPI_" has been prepended to many
18083 (not all) of the constants, typedefs, and structs.
18085 The globals "DebugLevel" and "DebugLayer" have been renamed
18086 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
18088 All other globals within the subsystem are now prefixed with
18089 "AcpiGbl_" Internal procedures within the subsystem are now
18090 prefixed with "Acpi" (with only a few exceptions). The original
18091 two-letter abbreviation for the subcomponent remains after "Acpi"
18092 - for example, CmCallocate became AcpiCmCallocate.
18094 Added a source code translation/conversion utility. Used to
18095 generate the Linux source code, it can be modified to generate
18096 other types of source as well. Can also be used to cleanup
18097 existing source by removing extraneous spaces and blank lines.
18098 Found in tools/acpisrc/*
18100 OsdUnMapMemory was renamed to OsdUnmapMemory and then
18101 AcpiOsUnmapMemory. (UnMap became Unmap).
18103 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
18104 When set to one, this indicates that the caller wants to use the
18106 semaphore as a mutex, not a counting semaphore. ACPI CA uses
18107 both types. However, implementers of this call may want to use
18108 different OS primitives depending on the type of semaphore
18109 requested. For example, some operating systems provide separate
18111 "mutex" and "semaphore" interfaces - where the mutex interface is
18112 much faster because it doesn't have all the overhead of a full
18113 semaphore implementation.
18115 Fixed a deadlock problem where a method that accesses the PCI
18116 address space can block forever if it is the first access to the
18119 -------------------------------------------
18120 Summary of changes for this label: 06_02_00
18122 Support for environments that cannot handle unaligned data
18123 accesses (e.g. firmware and OS environments devoid of alignment
18124 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
18125 been added (via configurable macros) in these three areas: -
18126 Transfer of data from the raw AML byte stream is done via byte
18127 moves instead of word/dword/qword moves. - External objects are
18128 aligned within the user buffer, including package elements (sub-
18129 objects). - Conversion of name strings to UINT32 Acpi Names is now
18132 The Store operator was modified to mimic Microsoft's
18133 implementation when storing to a Buffer Field.
18135 Added a check of the BM_STS bit before entering C3.
18137 The methods subdirectory has been obsoleted and removed. A new
18138 file, cmeval.c subsumes the functionality.
18140 A 16-bit (DOS) version of AcpiExec has been developed. The
18141 makefile is under the acpiexec directory.