1 ----------------------------------------
2 08 January 2019. Summary of changes for version 20190108:
4 This release is available at https://acpica.org/downloads
7 1) ACPICA kernel-resident subsystem:
9 Updated all copyrights to 2019. This affects all source code modules.
12 2) iASL Compiler/Disassembler and Tools:
14 ASL test suite (ASLTS): Updated all copyrights to 2019.
16 Tools: Updated all signon copyrights to 2019.
18 AcpiExec: Added a new option to dump extra information concerning any
19 memory leaks detected by the internal object/cache tracking mechanism. -
22 iASL: Updated the table template for the TPM2 table to the newest version
23 of the table (Revision 4)
26 ----------------------------------------
27 13 December 2018. Summary of changes for version 20181213:
30 1) ACPICA Kernel-resident Subsystem:
32 Fixed some buffer length issues with the GenericSerialBus, related to two
33 of the bidirectional protocols: AttribRawProcessBytes and AttribRawBytes,
34 which are rarely seen in the field. For these, the LEN field of the ASL
35 buffer is now ignored. Hans de Goede
37 Implemented a new object evaluation trace mechanism for control methods
38 and data objects. This includes nested control methods. It is
39 particularly useful for examining the ACPI execution during system
40 initialization since the output is relatively terse. The flag below
41 enables the output of the trace via the ACPI_DEBUG_PRINT_RAW interface:
42 #define ACPI_LV_EVALUATION 0x00080000
45 Enter evaluation : _SB.PCI0._INI (Method)
46 Exit evaluation : _SB.PCI0._INI
47 Enter evaluation : _OSI (Method)
48 Exit evaluation : _OSI
49 Enter evaluation : _SB.PCI0.TEST (Method)
50 Nested method call : _SB.PCI0.NST1
51 Exit nested method : _SB.PCI0.NST1
52 Exit evaluation : _SB.PCI0.TEST
54 Added two recently-defined _OSI strings. See
55 https://docs.microsoft.com/en-us/windows-hardware/drivers/acpi/winacpi-
60 Update for buffer-to-string conversions via the ToHexString ASL operator.
61 A "0x" is now prepended to each of the hex values in the output string.
62 This provides compatibility with other ACPI implementations. The ACPI
63 specification is somewhat vague on this issue.
64 Example output string after conversion:
65 "0x01,0x02,0x03,0x04,0x05,0x06"
67 Return a run-time error for TermArg expressions within individual package
68 elements. Although this is technically supported by the ASL grammar,
69 other ACPI implementations do not support this either. Also, this fixes a
70 fault if this type of construct is ever encountered (it never has been).
73 2) iASL Compiler/Disassembler and Tools:
75 iASL: Implemented a new compile option (-ww) that will promote individual
76 warnings and remarks to errors. This is intended to enhance the firmware
79 AcpiExec: Implemented a new command-line option (-eo) to support the new
80 object evaluation trace mechanism described above.
82 Disassembler: Added support to disassemble OEMx tables as AML/ASL tables
83 instead of a "unknown table" message.
85 AcpiHelp: Improved support for the "special" predefined names such as
86 _Lxx, _Exx, _EJx, _T_x, etc. For these, any legal hex value can now be
87 used for "xx" and "x".
89 ----------------------------------------
90 31 October 2018. Summary of changes for version 20181031:
93 An Operation Region regression was fixed by properly adding address
94 ranges to a global list during initialization. This allows OS to
95 accurately check for overlapping regions between native devices (such as
96 PCI) and Operation regions as well as checking for region conflicts
97 between two Operation Regions.
99 Added support for the 2-byte extended opcodes in the code/feature that
100 attempts to continue parsing during the table load phase. Skip parsing
101 Device declarations (and other extended opcodes) when an error occurs
102 during parsing. Previously, only single-byte opcodes were supported.
104 Cleanup: Simplified the module-level code support by eliminating a
105 useless global variable (AcpiGbl_GroupModuleLeveCode).
108 2) iASL Compiler/Disassembler and Tools:
110 iASL/Preprocessor: Fixed a regression where an incorrect use of ACPI_FREE
111 could cause a fault in the preprocessor. This was an inadvertent side-
112 effect from moving more allocations/frees to the local cache/memory
115 iASL: Enhanced error detection by validating that all NameSeg elements
116 within a NamePatch actually exist. The previous behavior was spotty at
117 best, and such errors could be improperly ignored at compiler time (never
118 at runtime, however. There are two new error messages, as shown in the
121 dsdt.asl 33: CreateByteField (TTTT.BXXX, 1, CBF1)
122 Error 6161 - ^ One or more objects within
123 the Pathname do not exist (TTTT.BXXX)
125 dsdt.asl 34: CreateByteField (BUF1, UUUU.INT1, BBBB.CBF1)
126 Error 6160 - One or more prefix Scopes do not exist ^
129 iASL: Disassembler/table-compiler: Added support for the static data
130 table TPM2 revision 3 (an older version of TPM2). The support has been
131 added for the compiler and the disassembler.
133 Fixed compilation of DOS format data table file on Unix/Linux systems.
134 iASL now properly detects line continuations (\) for DOS format data
135 table definition language files on when executing on Unix/Linux.
137 ----------------------------------------
138 03 October 2018. Summary of changes for version 20181003:
141 2) iASL Compiler/Disassembler and Tools:
143 Fixed a regression introduced in version 20180927 that could cause the
144 compiler to fault, especially with NamePaths containing one or more
145 carats (^). Such as: ^^_SB_PCI0
147 Added a new remark for the Sleep() operator when the sleep time operand
148 is larger than one second. This is a very long time for the ASL/BIOS code
149 and may not be what was intended by the ASL writer.
151 ----------------------------------------
152 27 September 2018. Summary of changes for version 20180927:
155 1) ACPICA kernel-resident subsystem:
157 Updated the GPE support to clear the status of all ACPI events when
158 entering any/all sleep states in order to avoid premature wakeups. In
159 theory, this may cause some wakeup events to be missed, but the
160 likelihood of this is small. This change restores the original behavior
161 of the ACPICA code in order to fix a regression seen from the previous
162 "Stop unconditionally clearing ACPI IRQs during suspend/resume" change.
163 This regression could cause some systems to incorrectly wake immediately.
165 Updated the execution of the _REG methods during initialization and
166 namespace loading to bring the behavior into closer conformance to the
167 ACPI specification and other ACPI implementations:
169 From the ACPI specification 6.2A, section 6.5.4 "_REG (Region):
170 "Control methods must assume all operation regions are inaccessible
171 until the _REG(RegionSpace, 1) method is executed"
173 "The exceptions to this rule are:
174 1. OSPM must guarantee that the following operation regions are always
176 SystemIO operation regions.
177 SystemMemory operation regions when accessing memory returned by the
178 System Address Map reporting interfaces."
180 Since the state of both the SystemIO and SystemMemory address spaces are
181 defined by the specification to never change, this ACPICA change ensures
182 that now _REG is never called on them. This solves some problems seen in
183 the field and provides compatibility with other ACPI implementations. An
184 update to the upcoming new version of the ACPI specification will help
185 clarify this behavior.
187 Updated the implementation of support for the Generic Serial Bus. For the
188 "bidirectional" protocols, the internal implementation now automatically
189 creates a return data buffer of the maximum size (255). This handles the
190 worst-case for data that is returned from the serial bus handler, and
191 fixes some problems seen in the field. This new buffer is directly
192 returned to the ASL. As such, there is no true "bidirectional" buffer,
193 which matches the ACPI specification. This is the reason for the "double
194 store" seen in the example ASL code in the specification, shown below:
196 Word Process Call (AttribProcessCall):
197 OperationRegion(TOP1, GenericSerialBus, 0x00, 0x100)
198 Field(TOP1, BufferAcc, NoLock, Preserve)
200 FLD1, 8, // Virtual register at command value 1.
203 Name(BUFF, Buffer(20){}) // Create GenericSerialBus data buffer
205 CreateWordField(BUFF, 0x02, DATA) // DATA = Data (Word)
207 Store(0x5416, DATA) // Save 0x5416 into the data buffer
208 Store(Store(BUFF, FLD1), BUFF) // Invoke a write/read Process Call
210 // This is the "double store". The write to
211 // FLD1 returns a new buffer, which is stored
212 // back into BUFF with the second Store.
215 2) iASL Compiler/Disassembler and Tools:
217 iASL: Implemented detection of extraneous/redundant uses of the Offset()
218 operator within a Field Unit list. A remark is now issued for these. For
219 example, the first two of the Offset() operators below are extraneous.
220 Because both the compiler and the interpreter track the offsets
221 automatically, these Offsets simply refer to the current offset and are
222 unnecessary. Note, when optimization is enabled, the iASL compiler will
223 in fact remove the redundant Offset operators and will not emit any AML
226 OperationRegion (OPR1, SystemMemory, 0x100, 0x100)
229 Offset (0), // Never needed
231 Offset (4), // Redundant, offset is already 4 (bytes)
233 Offset (64), // OK use of Offset.
236 dsdt.asl 14: Offset (0),
237 Remark 2158 - ^ Unnecessary/redundant use of Offset
240 dsdt.asl 16: Offset (4),
241 Remark 2158 - ^ Unnecessary/redundant use of Offset
244 ----------------------------------------
245 10 August 2018. Summary of changes for version 20180810:
248 1) ACPICA kernel-resident subsystem:
250 Initial ACPI table loading: Attempt to continue loading ACPI tables
251 regardless of malformed AML. Since migrating table initialization to the
252 new module-level code support, the AML interpreter rejected tables upon
253 any ACPI error encountered during table load. This is a problem because
254 non-serious ACPI errors during table load do not necessarily mean that
255 the entire definition block (DSDT or SSDT) is invalid. This change
256 improves the table loading by ignoring some types of errors that can be
257 generated by incorrect AML. This can range from object type errors, scope
258 errors, and index errors.
260 Suspend/Resume support: Update to stop unconditionally clearing ACPI IRQs
261 during suspend/resume. The status of ACPI events is no longer cleared
262 when entering the ACPI S5 system state (power off) which caused some
263 systems to power up immediately after turning off power in certain
264 situations. This was a functional regression. It was fixed by clearing
265 the status of all ACPI events again when entering S5 (for system-wide
266 suspend or hibernation the clearing of the status of all events is not
267 desirable, as it might cause the kernel to miss wakeup events sometimes).
271 2) iASL Compiler/Disassembler and Tools:
273 AcpiExec: Enhanced the -fi option (Namespace initialization file). Field
274 elements listed in the initialization file were previously initialized
275 after the table load and before executing module-level code blocks.
276 Recent changes in the module-level code support means that the table load
277 becomes a large control method execution. If fields are used within
278 module-level code and we are executing with the -fi option, the
279 initialization values were used to initialize the namespace object(s)
280 only after the table was finished loading. This change Provides an early
281 initialization of objects specified in the initialization file so that
282 field unit values are populated during the table load (not after the
285 AcpiExec: Fixed a small memory leak regression that could result in
286 warnings during exit of the utility. These warnings were similar to
288 0002D690 Length 0x0006 nsnames-0502 [Not a Descriptor - too small]
289 0002CD70 Length 0x002C utcache-0453 [Operand] Integer RefCount 0x0001
291 ----------------------------------------
292 29 June 2018. Summary of changes for version 20180629:
295 1) iASL Compiler/Disassembler and Tools:
297 iASL: Fixed a regression related to the use of the ASL External
298 statement. Error checking for the use of the External() statement has
299 been relaxed. Previously, a restriction on the use of External meant that
300 the referenced named object was required to be defined in a different
301 table (an SSDT). Thus it would be an error to declare an object as an
302 external and then define the same named object in the same table. For
304 DefinitionBlock (...)
307 Device (DEV1){...} // This was an error
309 However, this behavior has caused regressions in some existing ASL code,
310 because there is code that depends on named objects and externals (with
311 the same name) being declared in the same table. This change will allow
312 the ASL code above to compile without errors or warnings.
314 iASL: Implemented ASL language extensions for four operators to make some
315 of their arguments optional instead of required:
316 1) Field (RegionName, AccessType, LockRule, UpdateRule)
317 2) BankField (RegionName, BankName, BankValue,
318 AccessType, LockRule, UpdateRule)
319 3) IndexField (IndexName, DataName,
320 AccessType, LockRule, UpdateRule)
321 For the Field operators above, the AccessType, LockRule, and UpdateRule
322 are now optional arguments. The default values are:
326 4) Mutex (MutexName, SyncLevel)
327 For this operator, the SyncLevel argument is now optional. This argument
328 is rarely used in any meaningful way by ASL code, and thus it makes sense
329 to make it optional. The default value is:
332 iASL: Attempted use of the ASL Unload() operator now results in the
334 "Unload is not supported by all operating systems"
335 This is in fact very true, and the Unload operator may be completely
336 deprecated in the near future.
338 AcpiExec: Fixed a regression for the -fi option (Namespace initialization
339 file. Recent changes in the ACPICA module-level code support altered the
340 table load/initialization sequence . This means that the table load has
341 become a large method execution of the table itself. If Operation Region
342 Fields are used within any module-level code and the -fi option was
343 specified, the initialization values were populated only after the table
344 had completely finished loading (and thus the module-level code had
345 already been executed). This change moves the initialization of objects
346 listed in the initialization file to before the table is executed as a
347 method. Field unit values are now initialized before the table execution
350 ----------------------------------------
351 31 May 2018. Summary of changes for version 20180531:
354 1) ACPICA kernel-resident Subsystem:
356 Implemented additional support to help ensure that a DSDT or SSDT is
357 fully loaded even if errors are incurred during the load. The majority of
358 the problems that are seen is the failure of individual AML operators
359 that occur during execution of any module-level code (MLC) existing in
360 the table. This support adds a mechanism to abort the current ASL
361 statement (AML opcode), emit an error message, and to simply move on to
362 the next opcode -- instead of aborting the entire table load. This is
363 different than the execution of a control method where the entire method
364 is aborted upon any error. The goal is to perform a very "best effort" to
365 load the ACPI tables. The most common MLC errors that have been seen in
366 the field are direct references to unresolved ASL/AML symbols (referenced
367 directly without the use of the CondRefOf operator to validate the
368 symbol). This new ACPICA behavior is now compatible with other ACPI
371 Interpreter: The Unload AML operator is no longer supported for the
372 reasons below. An AE_NOT_IMPLEMENTED exception is returned.
373 1) A correct implementation on at least some hosts may not be possible.
374 2) Other ACPI implementations do not correctly/fully support it.
375 3) It requires host device driver support which is not known to exist.
376 (To properly support namespace unload out from underneath.)
377 4) This AML operator has never been seen in the field.
379 Parser: Added a debug option to dump AML parse sub-trees as they are
380 being executed. Used with ACPI_DEBUG_PRINT, the enabling debug level is
383 Debugger: Reduced the verbosity for errors incurred during table load and
384 module-level code execution.
386 Completed an investigation into adding a namespace node "owner list"
387 instead of the current "owner ID" associated with namespace nodes. This
388 list would link together all nodes that are owned by an individual
389 control method. The purpose would be to enhance control method execution
390 by speeding up cleanup during method exit (all namespace nodes created by
391 a method are deleted upon method termination.) Currently, the entire
392 namespace must be searched for matching owner IDs if (and only if) the
393 method creates named objects outside of the local scope. However, by far
394 the most common case is that methods create objects locally, not outside
395 the method scope. There is already an ACPICA optimization in place that
396 only searches the entire namespace in the rare case of a method creating
397 objects elsewhere in the namespace. Therefore, it is felt that the
398 overhead of adding an additional pointer to each namespace node to
399 implement the owner list makes this feature unnecessary.
402 2) iASL Compiler/Disassembler and Tools:
404 iASL, Disassembler, and Template generator: Implemented support for
405 Revision D of the IORT table. Adds a new subtable that is used to specify
406 SMMUv3 PMCGs. rmurphy-arm.
408 Disassembler: Restored correct table header validation for the "special"
409 ACPI tables -- RSDP and FACS. These tables do not contain a standard ACPI
410 table header and must be special-cased. This was a regression that has
411 been present for apparently a long time.
413 AcpiExec: Reduced verbosity of the local exception handler implemented
414 within acpiexec. This handler is invoked by ACPICA upon any exceptions
415 generated during control method execution. A new option was added: -vh
416 restores the original verbosity level if desired.
418 AcpiExec: Changed the default base from decimal to hex for the -x option
419 (set debug level). This simplifies the use of this option and matches the
420 behavior of the corresponding iASL -x option.
422 AcpiExec: Restored a force-exit on multiple control-c (sigint)
423 interrupts. This allows program termination even if other issues cause
424 the control-c to fail.
426 ASL test suite (ASLTS): Added tests for the recently implemented package
427 element resolution mechanism that allows forward references to named
428 objects from individual package elements (this mechanism provides
429 compatibility with other ACPI implementations.)
432 ----------------------------------------
433 8 May 2018. Summary of changes for version 20180508:
436 1) ACPICA kernel-resident subsystem:
438 Completed the new (recently deployed) package resolution mechanism for
439 the Load and LoadTable ASL/AML operators. This fixes a regression that
440 was introduced in version 20180209 that could result in an
441 AE_AML_INTERNAL exception during the loading of a dynamic ACPI/AML table
442 (SSDT) that contains package objects.
445 2) iASL Compiler/Disassembler and Tools:
447 AcpiDump and AcpiXtract: Implemented support for ACPI tables larger than
448 1 MB. This change allows for table offsets within the acpidump file to be
449 up to 8 characters. These changes are backwards compatible with existing
453 ----------------------------------------
454 27 April 2018. Summary of changes for version 20180427:
457 1) ACPICA kernel-resident subsystem:
459 Debugger: Added support for Package objects in the "Test Objects"
460 command. This command walks the entire namespace and evaluates all named
461 data objects (Integers, Strings, Buffers, and now Packages).
463 Improved error messages for the namespace root node. Originally, the root
464 was referred to by the confusing string "\___". This has been replaced by
465 "Namespace Root" for clarification.
467 Fixed a potential infinite loop in the AcpiRsDumpByteList function. Colin
468 Ian King <colin.king@canonical.com>.
471 2) iASL Compiler/Disassembler and Tools:
473 iASL: Implemented support to detect and flag illegal forward references.
474 For compatibility with other ACPI implementations, these references are
475 now illegal at the root level of the DSDT or SSDTs. Forward references
476 have always been illegal within control methods. This change should not
477 affect existing ASL/AML code because of the fact that these references
478 have always been illegal in the other ACPI implementation.
480 iASL: Added error messages for the case where a table OEM ID and OEM
481 TABLE ID strings are longer than the ACPI-defined length. Previously,
482 these strings were simply silently truncated.
484 iASL: Enhanced the -tc option (which creates an AML hex file in C,
485 suitable for import into a firmware project):
486 1) Create a unique name for the table, to simplify use of multiple
488 2) Add a protection #ifdef in the file, similar to a .h header file.
489 With assistance from Sami Mujawar, sami.mujawar@arm.com and Evan Lloyd,
492 AcpiExec: Added a new option, -df, to disable the local fault handler.
493 This is useful during debugging, where it may be desired to drop into a
496 ----------------------------------------
497 13 March 2018. Summary of changes for version 20180313:
500 1) ACPICA kernel-resident subsystem:
502 Implemented various improvements to the GPE support:
504 1) Dispatch all active GPEs at initialization time so that no GPEs are
506 2) Enable runtime GPEs earlier. Some systems expect GPEs to be enabled
507 before devices are enumerated.
508 3) Don't unconditionally clear ACPI IRQs during suspend/resume, so that
510 4) Add parallel GPE handling to eliminate the possibility of dispatching
512 5) Dispatch any pending GPEs after enabling for the first time.
514 AcpiGetObjectInfo - removed support for the _STA method. This was causing
515 problems on some platforms.
517 Added a new _OSI string, "Windows 2017.2".
519 Cleaned up and simplified the module-level code support. These changes
520 are in preparation for the eventual removal of the legacy MLC support
521 (deferred execution), replaced by the new MLC architecture which executes
522 the MLC as a table is loaded (DSDT/SSDTs).
524 Changed a compile-time option to a runtime option. Changes the option to
525 ignore ACPI table load-time package resolution errors into a runtime
526 option. Used only for platforms that generate many AE_NOT_FOUND errors
527 during boot. AcpiGbl_IgnorePackageResolutionErrors.
529 Fixed the ACPI_ERROR_NAMESPACE macro. This change involves putting some
530 ACPI_ERROR_NAMESPACE parameters inside macros. By doing so, we avoid
531 compilation errors from unused variables (seen with some compilers).
534 2) iASL Compiler/Disassembler and Tools:
536 ASLTS: parallelized execution in order to achieve an (approximately) 2X
537 performance increase.
539 ASLTS: Updated to use the iASL __LINE__ and __METHOD__ macros. Improves
542 ----------------------------------------
543 09 February 2018. Summary of changes for version 20180209:
546 1) ACPICA kernel-resident subsystem:
548 Completed the final integration of the recent changes to Package Object
549 handling and the module-level AML code support. This allows forward
550 references from individual package elements when the package object is
551 declared from within module-level code blocks. Provides compatibility
552 with other ACPI implementations.
554 The new architecture for the AML module-level code has been completed and
555 is now the default for the ACPICA code. This new architecture executes
556 the module-level code in-line as the ACPI table is loaded/parsed instead
557 of the previous architecture which deferred this code until after the
558 table was fully loaded. This solves some ASL code ordering issues and
559 provides compatibility with other ACPI implementations. At this time,
560 there is an option to fallback to the earlier architecture, but this
561 support is deprecated and is planned to be completely removed later this
564 Added a compile-time option to ignore AE_NOT_FOUND exceptions during
565 resolution of named reference elements within Package objects. Although
566 this is potentially a serious problem, it can generate a lot of
567 noise/errors on platforms whose firmware carries around a bunch of unused
568 Package objects. To disable these errors, define
569 ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS in the OS-specific header. All
570 errors are always reported for ACPICA applications such as AcpiExec.
572 Fixed a regression related to the explicit type-conversion AML operators
573 (ToXXXX). The regression was introduced early in 2017 but was not seen
574 until recently because these operators are not fully supported by other
575 ACPI implementations and are thus rarely used by firmware developers. The
576 operators are defined by the ACPI specification to not implement the
577 "implicit result object conversion". The regression incorrectly
578 introduced this object conversion for the following explicit conversion
589 2) iASL Compiler/Disassembler and Tools:
591 iASL: Fixed a problem with the compiler constant folding feature as
592 related to the ToXXXX explicit conversion operators. These operators do
593 not support the "implicit result object conversion" by definition. Thus,
594 ASL expressions that use these operators cannot be folded to a simple
595 Store operator because Store implements the implicit conversion. This
596 change uses the CopyObject operator for the ToXXXX operator folding
597 instead. CopyObject is defined to not implement implicit result
598 conversions and is thus appropriate for folding the ToXXXX operators.
600 iASL: Changed the severity of an error condition to a simple warning for
601 the case where a symbol is declared both locally and as an external
602 symbol. This accommodates existing ASL code.
604 AcpiExec: The -ep option to enable the new architecture for module-level
605 code has been removed. It is replaced by the -dp option which instead has
606 the opposite effect: it disables the new architecture (the default) and
607 enables the legacy architecture. When the legacy code is removed in the
608 future, the -dp option will be removed also.
610 ----------------------------------------
611 05 January 2018. Summary of changes for version 20180105:
614 1) ACPICA kernel-resident subsystem:
616 Updated all copyrights to 2018. This affects all source code modules.
618 Fixed a possible build error caused by an unresolved reference to the
619 AcpiUtSafeStrncpy function.
621 Removed NULL pointer arithmetic in the various pointer manipulation
622 macros. All "(void *) NULL" constructs are converted to "(void *) 0".
623 This eliminates warnings/errors in newer C compilers. Jung-uk Kim.
625 Added support for A32 ABI compilation, which uses the ILP32 model. Anuj
629 2) iASL Compiler/Disassembler and Tools:
631 ASLTS: Updated all copyrights to 2018.
633 Tools: Updated all signon copyrights to 2018.
635 AcpiXtract: Fixed a regression related to ACPI table signatures where the
636 signature was truncated to 3 characters (instead of 4).
638 AcpiExec: Restore the original terminal mode after the use of the -v and
641 ASLTS: Deployed the iASL __METHOD__ macro across the test suite.
643 ----------------------------------------
644 14 December 2017. Summary of changes for version 20171214:
647 1) ACPICA kernel-resident subsystem:
649 Fixed a regression in the external (public) AcpiEvaluateObjectTyped
650 interface where the optional "pathname" argument had inadvertently become
651 a required argument returning an error if omitted (NULL pointer
654 Fixed two possible memory leaks related to the recently developed "late
655 resolution" of reference objects within ASL Package Object definitions.
657 Added two recently defined _OSI strings: "Windows 2016" and "Windows
658 2017". Mario Limonciello.
660 Implemented and deployed a safer version of the C library function
661 strncpy: AcpiUtSafeStrncpy. The intent is to at least prevent the
662 creation of unterminated strings as a possible result of a standard
665 Cleaned up and restructured the global variable file (acglobal.h). There
666 are many changes, but no functional changes.
669 2) iASL Compiler/Disassembler and Tools:
671 iASL Table Compiler: Fixed a problem with the DBG2 ACPI table where the
672 optional OemData field at the end of the table was incorrectly required
673 for proper compilation. It is now correctly an optional field.
675 ASLTS: The entire suite was converted from standard ASL to the ASL+
676 language, using the ASL-to-ASL+ converter which is integrated into the
677 iASL compiler. A binary compare of all output files has verified the
678 correctness of the conversion.
680 iASL: Fixed the source code build for platforms where "char" is unsigned.
681 This affected the iASL lexer only. Jung-uk Kim.
683 ----------------------------------------
684 10 November 2017. Summary of changes for version 20171110:
687 1) ACPICA kernel-resident subsystem:
689 This release implements full support for ACPI 6.2A:
690 NFIT - Added a new subtable, "Platform Capabilities Structure"
691 No other changes to ACPICA were required, since ACPI 6.2A is primarily an
692 errata release of the specification.
694 Other ACPI table changes:
695 IORT: Added the SMMUv3 Device ID mapping index. Hanjun Guo
696 PPTT: Added cache attribute flag definitions to actbl1.h. Jeremy
699 Utilities: Modified the string/integer conversion functions to use
700 internal 64-bit divide support instead of a native divide. On 32-bit
701 platforms, a 64-bit divide typically requires a library function which
702 may not be present in the build (kernel or otherwise).
704 Implemented a targeted error message for timeouts returned from the
705 Embedded Controller device driver. This is seen frequently enough to
706 special-case an AE_TIME returned from an EC operation region access:
707 "Timeout from EC hardware or EC device driver"
709 Changed the "ACPI Exception" message prefix to "ACPI Error" so that all
710 runtime error messages have the identical prefix.
713 2) iASL Compiler/Disassembler and Tools:
715 AcpiXtract: Fixed a problem with table header detection within the
716 acpidump file. Processing a table could be ended early if a 0x40 (@)
717 appears in the original binary table, resulting in the @ symbol appearing
718 in the decoded ASCII field at the end of the acpidump text line. The
719 symbol caused acpixtract to incorrectly think it had reached the end of
720 the current table and the beginning of a new table.
722 AcpiXtract: Added an option (-f) to ignore some errors during table
723 extraction. This initial implementation ignores non-ASCII and non-
724 printable characters found in the acpidump text file.
726 TestSuite(ASLTS)/AcpiExec: Fixed and restored the memory usage statistics
727 for ASLTS. This feature is used to track memory allocations from
728 different memory caches within the ACPICA code. At the end of an ASLTS
729 run, these memory statistics are recorded and stored in a log file.
731 Debugger (user-space version): Implemented a simple "Background" command.
732 Creates a new thread to execute a control method in the background, while
733 control returns to the debugger prompt to allow additional commands.
734 Syntax: Background <Namepath> [Arguments]
736 ----------------------------------------
737 29 September 2017. Summary of changes for version 20170929:
740 1) ACPICA kernel-resident subsystem:
742 Redesigned and implemented an improved ASL While() loop timeout
743 mechanism. This mechanism is used to prevent infinite loops in the kernel
744 AML interpreter caused by either non-responsive hardware or incorrect AML
745 code. The new implementation uses AcpiOsGetTimer instead of a simple
746 maximum loop count, and is thus more accurate and constant across
747 different machines. The default timeout is currently 30 seconds, but this
748 may be adjusted later.
750 Renamed the ACPI_AML_INFINITE_LOOP exception to AE_AML_LOOP_TIMEOUT to
751 better reflect the new implementation of the loop timeout mechanism.
753 Updated the AcpiGetTimerDuration interface to cleanup the 64-bit support
754 and to fix an off-by-one error. Jung-uk Kim.
756 Fixed an EFI build problem by updating the makefiles to for a new file
757 that was added, utstrsuppt.c
760 2) iASL Compiler/Disassembler and Tools:
762 Implemented full support for the PDTT, SDEV, and TPM2 ACPI tables. This
763 includes support in the table disassembler, compiler, and template
766 iASL: Added an exception for an illegal type of recursive method
767 invocation. If a method creates named objects, the first recursive call
768 will fail at runtime. This change adds an error detection at compile time
769 to catch the problem up front. Note: Marking such a method as
770 "serialized" will not help with this problem, because the same thread can
771 acquire the method mutex more than once. Example compiler and runtime
781 Error 6152 - ^ Illegal recursive call to method
782 that creates named objects (MTH1)
784 Previous runtime exception:
785 ACPI Error: [INT1] Namespace lookup failure,
786 AE_ALREADY_EXISTS (20170831/dswload2-465)
788 iASL: Updated support for External() opcodes to improve namespace
789 management and error detection. These changes are related to issues seen
790 with multiple-segment namespace pathnames within External declarations,
793 External(\_SB.PCI0.GFX0, DeviceObj)
794 External(\_SB.PCI0.GFX0.ALSI)
796 iASL: Implemented support for multi-line error/warning messages. This
797 enables more detailed and helpful error messages as below, from the
798 initial deployment for the duplicate names error:
800 DSDT.iiii 1692: Device(PEG2) {
801 Error 6074 - ^ Name already exists in scope
804 Original name creation/declaration below:
805 DSDT.iiii 93: External(\_SB.PCI0.PEG2, DeviceObj)
807 AcpiXtract: Added additional flexibility to support differing input hex
808 dump formats. Specifically, hex dumps that contain partial disassembly
809 and/or comments within the ACPI table data definition. There exist some
810 dump utilities seen in the field that create this type of hex dump (such
811 as Simics). For example:
813 DSDT @ 0xdfffd0c0 (10999 bytes)
821 Creator_id 1280593481
822 Creator_revision 537399345
823 0000: 44 53 44 54 f7 2a 00 00 01 f3 42 58 50 43 00 00
825 2af0: 5f 4c 30 46 00 a4 01
827 Test suite: Miscellaneous changes/fixes:
828 More cleanup and simplification of makefiles
829 Continue compilation of test cases after a compile failure
830 Do not perform binary compare unless both files actually exist
832 iASL: Performed some code/module restructuring. Moved all memory
833 allocation functions to new modules. Two new files, aslallocate.c and
836 ----------------------------------------
837 31 August 2017. Summary of changes for version 20170831:
840 1) ACPICA kernel-resident subsystem:
842 Implemented internal support for full 64-bit addresses that appear in all
843 Generic Address Structure (GAS) structures. Previously, only the lower 32
844 bits were used. Affects the use of GAS structures in the FADT and other
845 tables, as well as the GAS structures passed to the AcpiRead and
846 AcpiWrite public external interfaces that are used by drivers. Lv Zheng.
848 Added header support for the PDTT ACPI table (Processor Debug Trigger
849 Table). Full support in the iASL Data Table Compiler and disassembler is
853 2) iASL Compiler/Disassembler and Tools:
855 iASL/Disassembler: Fixed a problem with the PPTT ACPI table (Processor
856 Properties Topology Table) where a flag bit was specified in the wrong
857 bit position ("Line Size Valid", bit 6).
859 iASL: Implemented support for Octal integer constants as defined by the
860 ASL language grammar, per the ACPI specification. Any integer constant
861 that starts with a zero is an octal constant. For example,
862 Store (037777, Local0) /* Octal constant */
863 Store (0x3FFF, Local0) /* Hex equivalent */
864 Store (16383, Local0) /* Decimal equivalent */
866 iASL: Improved overflow detection for 64-bit string conversions during
867 compilation of integer constants. "Overflow" in this case means a string
868 that represents an integer that is too large to fit into a 64-bit value.
869 Any 64-bit constants within a 32-bit DSDT or SSDT are still truncated to
870 the low-order 32 bits with a warning, as previously implemented. Several
871 new exceptions are defined that indicate a 64-bit overflow, as well as
872 the base (radix) that was used during the attempted conversion. Examples:
873 Local0 = 0xAAAABBBBCCCCDDDDEEEEFFFF // AE_HEX_OVERFLOW
874 Local0 = 01111222233334444555566667777 // AE_OCTAL_OVERFLOW
875 Local0 = 11112222333344445555666677778888 // AE_DECIMAL_OVERFLOW
877 iASL: Added a warning for the case where a ResourceTemplate is declared
878 with no ResourceDescriptor entries (coded as "ResourceTemplate(){}"). In
879 this case, the resulting template is created with a single END_TAG
880 descriptor, which is essentially useless.
882 iASL: Expanded the -vw option (ignore specific warnings/remarks) to
883 include compilation error codes as well.
885 ----------------------------------------
886 28 July 2017. Summary of changes for version 20170728:
889 1) ACPICA kernel-resident subsystem:
891 Fixed a regression seen with small resource descriptors that could cause
892 an inadvertent AE_AML_NO_RESOURCE_END_TAG exception.
894 AML interpreter: Implemented a new feature that allows forward references
895 from individual named references within package objects that are
896 contained within blocks of "module-level code". This provides
897 compatibility with other ACPI implementations and supports existing
898 firmware that depends on this feature. Example:
901 If (ABCD) /* An If() at module-level */
903 Name (PKG1, Package()
905 INT1 /* Forward reference to object INT1
911 AML Interpreter: Fixed a problem with the Alias() operator where aliases
912 to some ASL objects were not handled properly. Objects affected are:
913 Mutex, Event, and OperationRegion.
915 AML Debugger: Enhanced to properly handle AML Alias objects. These
916 objects have one level of indirection which was not fully supported by
919 Table Manager: Added support to detect and ignore duplicate SSDTs within
920 the XSDT/RSDT. This error in the XSDT has been seen in the field.
922 EFI and EDK2 support:
923 Enabled /WX flag for MSVC builds
924 Added support for AcpiOsStall, AcpiOsSleep, and AcpiOsGetTimer
925 Added local support for 64-bit multiply and shift operations
926 Added support to compile acpidump.efi on Windows
927 Added OSL function stubs for interfaces not used under EFI
929 Added additional support for the _DMA predefined name. _DMA returns a
930 buffer containing a resource template. This change add support within the
931 resource manager (AcpiWalkResourceBuffer) to walk and parse this list of
932 resource descriptors. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
935 2) iASL Compiler/Disassembler and Tools:
937 iASL: Fixed a problem where the internal input line buffer(s) could
938 overflow if there are very long lines in the input ASL source code file.
939 Implemented buffer management that automatically increases the size of
940 the buffers as necessary.
942 iASL: Added an option (-vx) to "expect" particular remarks, warnings and
943 errors. If the specified exception is not raised during compilation, the
944 compiler emits an error. This is intended to support the ASL test suite,
945 but may be useful in other contexts.
947 iASL: Implemented a new predefined macro, __METHOD__, which returns a
948 string containing the name of the current control method that is being
951 iASL: Implemented debugger and table compiler support for the SDEI ACPI
952 table (Software Delegated Exception Interface). James Morse
953 <james.morse@arm.com>
955 Unix/Linux makefiles: Added an option to disable compile optimizations.
956 The disable occurs when the NOOPT flag is set to TRUE.
957 theracermaster@gmail.com
959 Acpidump: Added support for multiple DSDT and FACS tables. This can occur
960 when there are different tables for 32-bit versus 64-bit.
962 Enhanced error reporting for the ASL test suite (ASLTS) by removing
963 unnecessary/verbose text, and emit the actual line number where an error
964 has occurred. These changes are intended to improve the usefulness of the
967 ----------------------------------------
968 29 June 2017. Summary of changes for version 20170629:
971 1) ACPICA kernel-resident subsystem:
973 Tables: Implemented a deferred ACPI table verification. This is useful
974 for operating systems where the tables cannot be verified in the early
975 initialization stage due to early memory mapping limitations on some
976 architectures. Lv Zheng.
978 Tables: Removed the signature validation for dynamically loaded tables.
979 Provides compatibility with other ACPI implementations. Previously, only
980 SSDT tables were allowed, as per the ACPI specification. Now, any table
981 signature can be used via the Load() operator. Lv Zheng.
983 Tables: Fixed several mutex issues that could cause errors during table
984 acquisition. Lv Zheng.
986 Tables: Fixed a problem where an ACPI warning could be generated if a
987 null pointer was passed to the AcpiPutTable interface. Lv Zheng.
989 Tables: Added a mechanism to handle imbalances for the AcpiGetTable and
990 AcpiPutTable interfaces. This applies to the "late stage" table loading
991 when the use of AcpiPutTable is no longer required (since the system
992 memory manager is fully running and available). Lv Zheng.
994 Fixed/Reverted a regression during processing of resource descriptors
995 that contain only a single EndTag. Fixes an AE_AML_NO_RESOURCE_END_TAG
996 exception in this case.
998 Headers: IORT/SMMU support: Updated the SMMU models for Revision C of the
999 I/O Remapping specification. Robin Murphy <robin.murphy@arm.com>
1001 Interpreter: Fixed a possible fault if an Alias operator with an invalid
1002 or duplicate target is encountered during Alias creation in
1003 AcpiExCreateAlias. Alex James <theracermaster@gmail.com>
1005 Added an option to use designated initializers for function pointers.
1006 Kees Cook <keescook@google.com>
1009 2) iASL Compiler/Disassembler and Tools:
1011 iASL: Allow compilation of External declarations with target pathnames
1012 that refer to existing named objects within the table. Erik Schmauss.
1014 iASL: Fixed a regression when compiling FieldUnits. Fixes an error if a
1015 FieldUnit name also is declared via External in the same table. Erik
1018 iASL: Allow existing scope names within pathnames used in External
1019 statements. For example:
1020 External (ABCD.EFGH) // ABCD exists, but EFGH is truly external
1023 iASL: IORT ACPI table: Implemented changes required to decode the new
1024 Proximity Domain for the SMMUv3 IORT. Disassembler and Data Table
1025 compiler. Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
1027 Disassembler: Don't abort disassembly on errors from External()
1028 statements. Erik Schmauss.
1030 Disassembler: fixed a possible fault when one of the Create*Field
1031 operators references a Resource Template. ACPICA Bugzilla 1396.
1033 iASL: In the source code, resolved some naming inconsistences across the
1034 parsing support. Fixes confusion between "Parse Op" and "Parse Node".
1035 Adds a new file, aslparseop.c
1037 ----------------------------------------
1038 31 May 2017. Summary of changes for version 20170531:
1041 0) ACPI 6.2 support:
1043 The ACPI specification version 6.2 has been released and is available at
1044 http://uefi.org/specifications
1046 This version of ACPICA fully supports the ACPI 6.2 specification. Changes
1047 are summarized below.
1049 New ACPI tables (Table Compiler/Disassembler/Templates):
1050 HMAT (Heterogeneous Memory Attributes Table)
1051 WSMT (Windows SMM Security Mitigation Table)
1052 PPTT (Processor Properties Topology Table)
1054 New subtables for existing ACPI tables:
1055 HEST (New subtable, Arch-deferred machine check)
1056 SRAT (New subtable, Arch-specific affinity structure)
1057 PCCT (New subtables, Extended PCC subspaces (types 3 and 4))
1059 Simple updates for existing ACPI tables:
1060 BGRT (two new flag bits)
1061 HEST (New bit defined for several subtables, GHES_ASSIST)
1063 New Resource Descriptors and Resource macros (Compiler/Disassembler):
1069 New type for hardware error notification (section 18.3.2.9)
1071 New predefined names/methods (Compiler/Interpreter):
1072 _HMA (Heterogeneous Memory Attributes)
1073 _LSI (Label Storage Information)
1074 _LSR (Label Storage Read)
1075 _LSW (Label Storage Write)
1077 ASL grammar/macro changes (Compiler):
1078 For() ASL macro, implemented with the AML while operator
1079 Extensions to Concatenate operator
1080 Support for multiple definition blocks in same ASL file
1081 Clarification for Buffer operator
1082 Allow executable AML code underneath all scopes (Devices, etc.)
1083 Clarification/change for the _OSI return value
1084 ASL grammar update for reference operators
1085 Allow a zero-length string for AML filename in DefinitionBlock
1088 New device object notification value
1089 Remove a notify value (0x0C) for graceful shutdown
1090 New UUIDs for processor/cache properties and
1091 physical package property
1092 New _HID, ACPI0014 (Wireless Power Calibration Device)
1095 1) ACPICA kernel-resident subsystem:
1097 Added support to disable ACPI events on hardware-reduced platforms.
1098 Eliminates error messages of the form "Could not enable fixed event". Lv
1101 Fixed a problem using Device/Thermal objects with the ObjectType and
1102 DerefOf ASL operators. This support had not been fully/properly
1105 Fixed a problem where if a Buffer object containing a resource template
1106 was longer than the actual resource template, an error was generated --
1107 even though the AML is legal. This case has been seen in the field.
1109 Fixed a problem with the header definition of the MADT PCAT_COMPAT flag.
1110 The values for DUAL_PIC and MULTIPLE_APIC were reversed.
1112 Added header file changes for the TPM2 ACPI table. Update to new version
1113 of the TCG specification. Adds a new TPM2 subtable for ARM SMC.
1115 Exported the external interfaces AcpiAcquireMutex and AcpiReleaseMutex.
1116 These interfaces are intended to be used only in conjunction with the
1117 predefined _DLM method (Device Lock Method). "This object appears in a
1118 device scope when AML access to the device must be synchronized with the
1121 Example Code and Data Size: These are the sizes for the OS-independent
1122 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1123 debug version of the code includes the debug output trace mechanism and
1124 has a much larger code and data size.
1127 Non-Debug Version: 143.1K Code, 60.0K Data, 203.1K Total
1128 Debug Version: 204.0K Code, 84.3K Data, 288.3K Total
1130 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
1131 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
1134 2) iASL Compiler/Disassembler and Tools:
1136 iASL: Fixed a problem where an External() declaration could not refer to
1137 a Field Unit. Erik Schmauss.
1139 Disassembler: Improved support for the Switch/Case operators. This
1140 feature will disassemble AML code back to the original Switch operators
1141 when possible, instead of an If..Else sequence. David Box
1143 iASL and disassembler: Improved the handling of multiple extraneous
1144 parentheses for both ASL input and disassembled ASL output.
1146 Improved the behavior of the iASL compiler and disassembler to detect
1147 improper use of external declarations
1149 Disassembler: Now aborts immediately upon detection of an unknown AML
1150 opcode. The AML parser has no real way to recover from this, and can
1151 result in the creation of an ill-formed parse tree that causes errors
1152 later during the disassembly.
1154 All tools: Fixed a problem where the Unix application OSL did not handle
1155 control-c correctly. For example, a control-c could incorrectly wake the
1158 AcpiExec: Improved the Control-C handling and added a handler for
1159 segmentation faults (SIGSEGV). Supports both Windows and Unix-like
1162 Reduced the verbosity of the generic unix makefiles. Previously, each
1163 compilation displayed the full set of compiler options. This has been
1164 eliminated as the options are easily inspected within the makefiles. Each
1165 compilation now results in a single line of output.
1167 ----------------------------------------
1168 03 March 2017. Summary of changes for version 20170303:
1171 0) ACPICA licensing:
1173 The licensing information at the start of each source code module has
1174 been updated. In addition to the Intel license, the dual GPLv2/BSD
1175 license has been added for completeness. Now, a single version of the
1176 source code should be suitable for all ACPICA customers. This is the
1177 major change for this release since it affects all source code modules.
1180 1) ACPICA kernel-resident subsystem:
1182 Fixed two issues with the common asltypes.h header that could cause
1183 problems in some environments: (Kim Jung-uk)
1184 Removed typedef for YY_BUFFER_STATE ?
1185 Fixes an error with earlier versions of Flex.
1186 Removed use of FILE typedef (which is only defined in stdio.h)
1189 2) iASL Compiler/Disassembler and Tools:
1191 Disassembler: fixed a regression introduced in 20170224. A fix for a
1192 memory leak related to resource descriptor tags (names) could fault when
1193 the disassembler was generated with 64-bit compilers.
1195 The ASLTS test suite has been updated to implement a new testing
1196 architecture. During generation of the suite from ASL source, both the
1197 ASL and ASL+ compilers are now validated, as well as the disassembler
1198 itself (Erik Schmauss). The architecture executes as follows:
1200 For every ASL source module:
1201 Compile (legacy ASL compilation)
1202 Disassemble the resulting AML to ASL+ source code
1203 Compile the new ASL+ module
1204 Perform a binary compare on the legacy AML and the new ASL+ AML
1205 The ASLTS suite then executes normally using the AML binaries.
1207 ----------------------------------------
1208 24 February 2017. Summary of changes for version 20170224:
1211 1) ACPICA kernel-resident subsystem:
1213 Interpreter: Fixed two issues with the control method return value auto-
1214 repair feature, where an attempt to double-delete an internal object
1215 could result in an ACPICA warning (for _CID repair and others). No fault
1216 occurs, however, because the attempted deletion (actually a release to an
1217 internal cache) is detected and ignored via object poisoning.
1219 Debugger: Fixed an AML interpreter mutex issue during the single stepping
1220 of control methods. If certain debugger commands are executed during
1221 stepping, a mutex aquire/release error could occur. Lv Zheng.
1223 Fixed some issues generating ACPICA with the Intel C compiler by
1224 restoring the original behavior and compiler-specific include file in
1227 Example Code and Data Size: These are the sizes for the OS-independent
1228 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1229 debug version of the code includes the debug output trace mechanism and
1230 has a much larger code and data size.
1233 Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
1234 Debug Version: 207.5K Code, 82.7K Data, 290.2K Total
1236 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1237 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1240 2) iASL Compiler/Disassembler and Tools:
1242 iASL/Disassembler: A preliminary version of a new ASL-to-ASL+ conversion
1243 tool has been designed, implemented, and included in this release. The
1244 key feature of this utility is that the original comments within the
1245 input ASL file are preserved during the conversion process, and included
1246 within the converted ASL+ file -- thus creating a transparent conversion
1247 of existing ASL files to ASL+ (ASL 2.0). Erik Schmauss.
1249 Usage: iasl -ca <ASL-filename> // Output is a .dsl file with
1252 iASL/Disassembler: Improved the detection and correct disassembly of
1253 Switch/Case operators. This feature detects sequences of if/elseif/else
1254 operators that originated from ASL Switch/Case/Default operators and
1255 emits the original operators. David Box.
1257 iASL: Improved the IORT ACPI table support in the following areas. Lv
1259 Clear MappingOffset if the MappingCount is zero.
1260 Fix the disassembly of the SMMU GSU interrupt offset.
1261 Update the template file for the IORT table.
1263 Disassembler: Enhanced the detection and disassembly of resource
1264 template/descriptor within a Buffer object. An EndTag descriptor is now
1265 required to have a zero second byte, since all known ASL compilers emit
1266 this. This helps eliminate incorrect decisions when a buffer is
1267 disassembled (false positives on resource templates).
1269 ----------------------------------------
1270 19 January 2017. Summary of changes for version 20170119:
1273 1) General ACPICA software:
1275 Entire source code base: Added the 2017 copyright to all source code
1276 legal/licensing module headers and utility/tool signons. This includes
1277 the standard Linux dual-license header. This affects virtually every file
1278 in the ACPICA core subsystem, iASL compiler, all ACPICA utilities, and
1279 the ACPICA test suite.
1282 2) iASL Compiler/Disassembler and Tools:
1284 iASL: Removed/fixed an inadvertent remark when a method argument
1285 containing a reference is used as a target operand within the method (and
1286 never used as a simple argument), as in the example below. Jeffrey Hugo.
1288 dsdt.asl 1507: Store(0x1, Arg0)
1289 Remark 2146 - ^ Method Argument is never used (Arg0)
1291 All tools: Removed the bit width of the compiler that generated the tool
1292 from the common signon for all user space tools. This proved to be
1293 confusing and unnecessary. This includes similar removal of HARDWARE_NAME
1294 from the generic makefiles (Thomas Petazzoni). Example below.
1297 ASL+ Optimizing Compiler version 20170119-32
1298 ASL+ Optimizing Compiler version 20170119-64
1301 ASL+ Optimizing Compiler version 20170119
1303 ----------------------------------------
1304 22 December 2016. Summary of changes for version 20161222:
1307 1) ACPICA kernel-resident subsystem:
1309 AML Debugger: Implemented a new mechanism to simplify and enhance
1310 debugger integration into all environments, including kernel debuggers
1311 and user-space utilities, as well as remote debug services. This
1312 mechanism essentially consists of new OSL interfaces to support debugger
1313 initialization/termination, as well as wait/notify interfaces to perform
1314 the debugger handshake with the host. Lv Zheng.
1317 AcpiOsInitializeDebugger (void)
1318 AcpiOsTerminateDebugger (void)
1319 AcpiOsWaitCommandReady (void)
1320 AcpiOsNotifyCommandComplete (void)
1322 New OS services layer:
1323 osgendbg.c -- Example implementation, and used for AcpiExec
1325 Update for Generic Address Space (GAS) support: Although the AccessWidth
1326 and/or BitOffset fields of the GAS are not often used, this change now
1327 fully supports these fields. This affects the internal support for FADT
1328 registers, registers in other ACPI data tables, and the AcpiRead and
1329 AcpiWrite public interfaces. Lv Zheng.
1331 Sleep support: In order to simplify integration of ACPI sleep for the
1332 various host operating systems, a new OSL interface has been introduced.
1333 AcpiOsEnterSleep allows the host to perform any required operations
1334 before the final write to the sleep control register(s) is performed by
1338 AcpiOsEnterSleep(SleepState, RegisterAValue, RegisterBValue)
1340 Called from these internal interfaces:
1344 EFI support: Added a very small EFI/ACPICA example application. Provides
1345 a simple demo for EFI integration, as well as assisting with resolution
1346 of issues related to customer ACPICA/EFI integration. Lv Zheng. See:
1348 source/tools/efihello/efihello.c
1350 Local C library: Implemented several new functions to enhance ACPICA
1351 portability, for environments where these clib functions are not
1352 available (such as EFI). Lv Zheng:
1359 Fixed a regression where occasionally a valid resource descriptor was
1360 incorrectly detected as invalid at runtime, and a
1361 AE_AML_NO_RESOURCE_END_TAG was returned.
1363 Fixed a problem with the recently implemented support that enables
1364 control method invocations as Target operands to many ASL operators.
1365 Warnings of this form: "Needed type [Reference], found [Processor]" were
1366 seen at runtime for some method invocations.
1368 Example Code and Data Size: These are the sizes for the OS-independent
1369 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1370 debug version of the code includes the debug output trace mechanism and
1371 has a much larger code and data size.
1374 Non-Debug Version: 141.5K Code, 58.5K Data, 200.0K Total
1375 Debug Version: 201.7K Code, 82.7K Data, 284.4K Total
1377 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1378 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
1381 2) iASL Compiler/Disassembler and Tools:
1383 Disassembler: Enhanced output by adding the capability to detect and
1384 disassemble ASL Switch/Case statements back to the original ASL source
1385 code instead of if/else blocks. David Box.
1387 AcpiHelp: Split a large file into separate files based upon
1388 functionality/purpose. New files are:
1392 ----------------------------------------
1393 17 November 2016. Summary of changes for version 20161117:
1396 1) ACPICA kernel-resident subsystem:
1398 Table Manager: Fixed a regression introduced in 20160729, "FADT support
1399 cleanup". This was an attempt to remove all references in the source to
1400 the FADT version 2, which never was a legal version number. It was
1401 skipped because it was an early version of 64-bit support that was
1402 eventually abandoned for the current 64-bit support.
1404 Interpreter: Fixed a problem where runtime implicit conversion was
1405 incorrectly disabled for the ASL operators below. This brings the
1406 behavior into compliance with the ACPI specification:
1414 Table Manager: Added a new public interface, AcpiPutTable, used to
1415 release and free an ACPI table returned by AcpiGetTable and related
1416 interfaces. Lv Zheng.
1418 Example Code and Data Size: These are the sizes for the OS-independent
1419 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1420 debug version of the code includes the debug output trace mechanism and
1421 has a much larger code and data size.
1424 Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1425 Debug Version: 201.3K Code, 82.7K Data, 284.0K Total
1427 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1428 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
1431 2) iASL Compiler/Disassembler and Tools:
1433 Disassembler: Fixed a regression for disassembly of Resource Template.
1434 Detection of templates in the AML stream missed some types of templates.
1436 iASL: Fixed a problem where an Access Size error was returned for the PCC
1437 address space when the AccessSize of the GAS register is greater than a
1440 iASL: Implemented several grammar changes for the operators below. These
1441 changes are slated for the next version of the ACPI specification:
1442 RefOf - Disallow method invocation as an operand
1443 CondRefOf - Disallow method invocation as an operand
1444 DerefOf - Disallow operands that use the result from operators
1446 do not return a reference (Changed TermArg to
1449 iASL: Control method invocations are now allowed for Target operands, as
1450 per the ACPI specification. Removed error for using a control method
1451 invocation as a Target operand.
1453 Disassembler: Improved detection of Resource Templates, Unicode, and
1454 Strings within Buffer objects. These subtypes do not contain a specific
1455 opcode to indicate the originating ASL code, and they must be detected by
1456 other means within the disassembler.
1458 iASL: Implemented an optimization improvement for 32-bit ACPI tables
1459 (DSDT/SSDT). For the 32-bit case only, compute the optimum integer opcode
1460 only after 64-bit to 32-bit truncation. A truncation warning message is
1461 still emitted, however.
1463 AcpiXtract: Implemented handling for both types of line terminators (LF
1464 or CR/LF) so that it can accept AcpiDump output files from any system.
1467 AcpiBin: Added two new options for comparing AML files:
1468 -a: compare and display ALL mismatches
1469 -o: start compare at this offset into the second file
1471 ----------------------------------------
1472 30 September 2016. Summary of changes for version 20160930:
1475 1) ACPICA kernel-resident subsystem:
1477 Fixed a regression in the internal AcpiTbFindTable function where a non
1478 AE_OK exception could inadvertently be returned even if the function did
1479 not fail. This problem affects the following operators:
1483 Fixed a regression in the LoadTable operator where a load to any
1484 namespace location other than the root no longer worked properly.
1486 Increased the maximum loop count value that will result in the
1487 AE_AML_INFINITE_LOOP exception. This is a mechanism that is intended to
1488 prevent infinite loops within the AML interpreter and thus the host OS
1489 kernel. The value is increased from 0xFFFF to 0xFFFFF loops (65,535 to
1492 Moved the AcpiGbl_MaxLoopIterations configuration variable to the public
1493 acpixf.h file. This allows hosts to easily configure the maximum loop
1496 Removed an illegal character in the strtoul64.c file. This character
1497 caused errors with some C compilers.
1499 Example Code and Data Size: These are the sizes for the OS-independent
1500 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1501 debug version of the code includes the debug output trace mechanism and
1502 has a much larger code and data size.
1505 Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1506 Debug Version: 200.7K Code, 82.1K Data, 282.8K Total
1508 Non-Debug Version: 140.0K Code, 58.1K Data, 198.1K Total
1509 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
1512 2) iASL Compiler/Disassembler and Tools:
1514 Disassembler: Fixed a problem with the conversion of Else{If{ blocks into
1515 the simpler ASL ElseIf keyword. During the conversion, a trailing If
1516 block could be lost and missing from the disassembled output.
1518 iASL: Fixed a missing parser rule for the ObjectType operator. For ASL+,
1519 the missing rule caused a parse error when using the Index operator as an
1520 operand to ObjectType. This construct now compiles properly. Example:
1521 ObjectType(PKG1[4]).
1523 iASL: Correctly handle unresolved symbols in the hardware map file (-lm
1524 option). Previously, unresolved symbols could cause a protection fault.
1525 Such symbols are now marked as unresolved in the map file.
1527 iASL: Implemented support to allow control method invocations as an
1528 operand to the ASL DeRefOf operator. Example:
1529 DeRefOf(MTH1(Local0))
1531 Disassembler: Improved support for the ToPLD ASL macro. Detection of a
1532 possible _PLD buffer now includes examination of both the normal buffer
1533 length (16 or 20) as well as the surrounding AML package length.
1535 Disassembler: Fixed a problem with the decoding of complex expressions
1536 within the Divide operator for ASL+. For the case where both the quotient
1537 and remainder targets are specified, the entire statement cannot be
1538 disassembled. Previously, the output incorrectly contained a mix of ASL-
1539 and ASL+ operators. This mixed statement causes a syntax error when
1541 Divide (Add (INT1, 6), 128, RSLT, QUOT) // was incorrectly
1543 Divide (INT1 + 6, 128, RSLT, QUOT)
1545 iASL/Tools: Added support to process AML and non-AML ACPI tables
1546 consistently. For the disassembler and AcpiExec, allow all types of ACPI
1547 tables (AML and data tables). For the iASL -e option, allow only AML
1550 ----------------------------------------
1551 31 August 2016. Summary of changes for version 20160831:
1554 1) ACPICA kernel-resident subsystem:
1556 Improve support for the so-called "module-level code", which is defined
1557 to be math, logical and control AML opcodes that appear outside of any
1558 control method. This change improves the support by adding more opcodes
1559 that can be executed in the manner. Some other issues have been solved,
1560 and the ASL grammar changes to support such code under all scope
1561 operators (Device, etc.) are complete. Lv Zheng.
1563 UEFI support: these OSL functions have been implemented. This is an
1564 additional step toward supporting the AcpiExec utility natively (with
1565 full hardware access) under UEFI. Marcelo Ferreira.
1566 AcpiOsReadPciConfiguration
1567 AcpiOsWritePciConfiguration
1569 Fixed a possible mutex error during control method auto-serialization. Lv
1572 Updated support for the Generic Address Structure by fully implementing
1573 all GAS fields when a 32-bit address is expanded to a 64-bit GAS. Lv
1576 Updated the return value for the internal _OSI method. Instead of
1577 0xFFFFFFFF, the "Ones" value is now returned, which is 0xFFFFFFFFFFFFFFFF
1578 for 64-bit ACPI tables. This fixes an incompatibility with other ACPI
1579 implementations, and will be reflected and clarified in the next version
1580 of the ACPI specification.
1582 Implemented two new table events that can be passed to an ACPICA table
1583 handler. These events are used to indicate a table installation or
1584 uninstallation. These events are used in addition to existed table load
1585 and unload events. Lv Zheng.
1587 Implemented a cleanup for all internal string-to-integer conversions.
1588 Consolidate multiple versions of this functionality and limit possible
1589 bases to either 10 or 16 to simplify the code. Adds a new file,
1592 Cleanup the inclusion order of the various compiler-specific headers.
1593 This simplifies build configuration management. The compiler-specific
1594 headers are now split out from the host-specific headers. Lv Zheng.
1596 Example Code and Data Size: These are the sizes for the OS-independent
1597 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1598 debug version of the code includes the debug output trace mechanism and
1599 has a much larger code and data size.
1602 Non-Debug Version: 140.1K Code, 58.1K Data, 198.1K Total
1603 Debug Version: 200.3K Code, 82.1K Data, 282.4K Total
1606 2) iASL Compiler/Disassembler and Tools:
1608 iASL/AcpiExec: Added a command line option to display the build date/time
1609 of the tool (-vd). This can be useful to verify that the correct version
1610 of the tools are being used.
1612 AML Debugger: Implemented a new subcommand ("execute predef") to execute
1613 all predefined control methods and names within the current namespace.
1614 This can be useful for debugging problems with ACPI tables and the ACPI
1617 ----------------------------------------
1618 29 July 2016. Summary of changes for version 20160729:
1621 1) ACPICA kernel-resident subsystem:
1623 Implemented basic UEFI support for the various ACPICA tools. This
1625 1) An OSL to implement the various AcpiOs* interfaces on UEFI.
1626 2) Support to obtain the ACPI tables on UEFI.
1627 3) Local implementation of required C library functions not available on
1629 4) A front-end (main) function for the tools for UEFI-related
1632 The initial deployment of this support is the AcpiDump utility executing
1633 as an UEFI application via EDK2 (EDKII, "UEFI Firmware Development Kit").
1634 Current environments supported are Linux/Unix. MSVC generation is not
1635 supported at this time. See the generate/efi/README file for build
1636 instructions. Lv Zheng.
1638 Future plans include porting the AcpiExec utility to execute natively on
1639 the platform with I/O and memory access. This will allow viewing/dump of
1640 the platform namespace and native execution of ACPI control methods that
1641 access the actual hardware. To fully implement this support, the OSL
1642 functions below must be implemented with UEFI interfaces. Any community
1643 help in the implementation of these functions would be appreciated:
1648 AcpiOsReadPciConfiguration
1649 AcpiOsWritePciConfiguration
1651 Restructured and standardized the C library configuration for ACPICA,
1652 resulting in the various configuration options below. This includes a
1653 global restructuring of the compiler-dependent and platform-dependent
1654 include files. These changes may affect the existing platform-dependent
1655 configuration files on some hosts. Lv Zheng.
1657 The current C library configuration options appear below. For any issues,
1658 it may be helpful to examine the existing compiler-dependent and
1659 platform-dependent files as examples. Lv Zheng.
1662 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1664 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
1665 2) Unix/Windows/BSD applications:
1666 ACPI_USE_STANDARD_HEADERS=y in order to use system-provided C
1668 ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
1669 3) UEFI applications:
1670 ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1672 ACPI_USE_SYSTEM_CLIBRARY=n in order to use ACPICA mini C library.
1673 4) UEFI applications (EDK2/StdLib):
1674 ACPI_USE_STANDARD_HEADERS=y in order to use EDK2 StdLib C library.
1675 ACPI_USE_SYSTEM_CLIBRARY=y in order to use EDK2 StdLib C library.
1678 AML interpreter: "module-level code" support. Allows for execution of so-
1679 called "executable" AML code (math/logical operations, etc.) outside of
1680 control methods not just at the module level (top level) but also within
1681 any scope declared outside of a control method - Scope{}, Device{},
1682 Processor{}, PowerResource{}, and ThermalZone{}. Lv Zheng.
1684 Simplified the configuration of the "maximum AML loops" global option by
1685 adding a global public variable, "AcpiGbl_MaxLoopIterations" which can be
1686 modified at runtime.
1689 Example Code and Data Size: These are the sizes for the OS-independent
1690 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1691 debug version of the code includes the debug output trace mechanism and
1692 has a much larger code and data size.
1695 Non-Debug Version: 139.1K Code, 22.9K Data, 162.0K Total
1696 Debug Version: 199.0K Code, 81.8K Data, 280.8K Total
1699 2) iASL Compiler/Disassembler and Tools:
1701 iASL: Add full support for the RASF ACPI table (RAS Features Table).
1702 Includes disassembler, data table compiler, and header support.
1704 iASL Expand "module-level code" support. Allows for
1705 compilation/disassembly of so-called "executable" AML code (math/logical
1706 operations, etc.) outside of control methods not just at the module level
1707 (top level) but also within any scope declared outside of a control
1708 method - Scope{}, Device{}, Processor{}, PowerResource{}, and
1711 AcpiDump: Added support for dumping all SSDTs on newer versions of
1712 Windows. These tables are now easily available -- SSDTs are not available
1713 through the registry on older versions.
1715 ----------------------------------------
1716 27 May 2016. Summary of changes for version 20160527:
1719 1) ACPICA kernel-resident subsystem:
1721 Temporarily reverted the new arbitrary bit length/alignment support in
1722 AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been
1723 a number of regressions with the new code that need to be fully resolved
1724 and tested before this support can be finally integrated into ACPICA.
1725 Apologies for any inconveniences these issues may have caused.
1727 The ACPI message macros are not configurable (ACPI_MSG_ERROR,
1728 ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR,
1729 and ACPI_MSG_BIOS_WARNING). Lv Zheng.
1731 Fixed a couple of GCC warnings associated with the use of the -Wcast-qual
1732 option. Adds a new return macro, return_STR. Junk-uk Kim.
1734 Example Code and Data Size: These are the sizes for the OS-independent
1735 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1736 debug version of the code includes the debug output trace mechanism and
1737 has a much larger code and data size.
1740 Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
1741 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1743 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1744 Debug Version: 200.9K Code, 82.2K Data, 283.1K Total
1746 ----------------------------------------
1747 22 April 2016. Summary of changes for version 20160422:
1749 1) ACPICA kernel-resident subsystem:
1751 Fixed a regression in the GAS (generic address structure) arbitrary bit
1752 support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior
1753 and incorrect return values. Lv Zheng. ACPICA BZ 1270.
1755 ACPI 6.0: Added support for new/renamed resource macros. One new argument
1756 was added to each of these macros, and the original name has been
1757 deprecated. The AML disassembler will always disassemble to the new
1758 names. Support for the new macros was added to iASL, disassembler,
1759 resource manager, and the acpihelp utility. ACPICA BZ 1274.
1761 I2cSerialBus -> I2cSerialBusV2
1762 SpiSerialBus -> SpiSerialBusV2
1763 UartSerialBus -> UartSerialBusV2
1765 ACPI 6.0: Added support for a new integer field that was appended to the
1766 package object returned by the _BIX method. This adds iASL compile-time
1767 and AML runtime error checking. ACPICA BZ 1273.
1769 ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm
1770 Subspace Type2" (Headers, Disassembler, and data table compiler).
1772 Example Code and Data Size: These are the sizes for the OS-independent
1773 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1774 debug version of the code includes the debug output trace mechanism and
1775 has a much larger code and data size.
1778 Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1779 Debug Version: 201.5K Code, 82.2K Data, 283.7K Total
1781 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
1782 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
1785 2) iASL Compiler/Disassembler and Tools:
1787 iASL: Implemented an ASL grammar extension to allow/enable executable
1788 "module-level code" to be created and executed under the various
1789 operators that create new scopes. This type of AML code is already
1790 supported in all known AML interpreters, and the grammar change will
1791 appear in the next version of the ACPI specification. Simplifies the
1792 conditional runtime creation of named objects under these object types:
1800 iASL: Implemented a new ASL extension, a "For" loop macro to add greater
1801 ease-of-use to the ASL language. The syntax is similar to the
1802 corresponding C operator, and is implemented with the existing AML While
1803 opcode -- thus requiring no changes to existing AML interpreters.
1805 For (Initialize, Predicate, Update) {TermList}
1810 Initializer // Nothing | TermArg => ComputationalData
1811 Predicate // Nothing | TermArg => ComputationalData
1812 Update // Nothing | TermArg => ComputationalData
1816 iASL: The _HID/_ADR detection and validation has been enhanced to search
1817 under conditionals in order to allow these objects to be conditionally
1820 iASL: Fixed several issues with the constant folding feature. The
1821 improvement allows better detection and resolution of statements that can
1822 be folded at compile time. ACPICA BZ 1266.
1824 iASL/Disassembler: Fixed a couple issues with the Else{If{}...}
1825 conversion to the ASL ElseIf operator where incorrect ASL code could be
1828 iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where
1829 sometimes an extra (and extraneous) set of parentheses were emitted for
1830 some combinations of operators. Although this did not cause any problems
1831 with recompilation of the disassembled code, it made the code more
1832 difficult to read. David Box. ACPICA BZ 1231.
1834 iASL: Changed to ignore the unreferenced detection for predefined names
1835 of resource descriptor elements, when the resource descriptor is
1836 created/defined within a control method.
1838 iASL: Disassembler: Fix a possible fault with externally declared Buffer
1841 ----------------------------------------
1842 18 March 2016. Summary of changes for version 20160318:
1844 1) ACPICA kernel-resident subsystem:
1846 Added support for arbitrary bit lengths and bit offsets for registers
1847 defined by the Generic Address Structure. Previously, only aligned bit
1848 lengths of 8/16/32/64 were supported. This was sufficient for many years,
1849 but recently some machines have been seen that require arbitrary bit-
1850 level support. ACPICA BZ 1240. Lv Zheng.
1852 Fixed an issue where the \_SB._INI method sometimes must be evaluated
1853 before any _REG methods are evaluated. Lv Zheng.
1855 Implemented several changes related to ACPI table support
1856 (Headers/Disassembler/TableCompiler):
1857 NFIT: For ACPI 6.1, updated to add some additional new fields and
1859 FADT: Updated a warning message and set compliance to ACPI 6.1 (Version
1861 DMAR: Added new constants per the 10/2014 DMAR spec.
1862 IORT: Added new subtable per the 10/2015 IORT spec.
1863 HEST: For ACPI 6.1, added new constants and new subtable.
1864 DBG2: Added new constants per the 12/2015 DBG2 spec.
1865 FPDT: Fixed several incorrect fields, add the FPDT boot record structure.
1867 ERST/EINJ: Updated disassembler with new "Execute Timings" actions.
1869 Updated header support for the DMAR table to match the current version of
1872 Added extensions to the ASL Concatenate operator to allow any ACPI object
1873 to be passed as an operand. Any object other than Integer/String/Buffer
1874 simply returns a string containing the object type. This extends the
1875 usefulness of the Printf macros. Previously, Concatenate would abort the
1876 control method if a non-data object was encountered.
1878 ACPICA source code: Deployed the C "const" keyword across the source code
1879 where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).
1881 Example Code and Data Size: These are the sizes for the OS-independent
1882 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1883 debug version of the code includes the debug output trace mechanism and
1884 has a much larger code and data size.
1887 Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
1888 Debug Version: 201.0K Code, 82.0K Data, 283.0K Total
1890 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
1891 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
1894 2) iASL Compiler/Disassembler and Tools:
1896 iASL/Disassembler: Improved the heuristic used to determine the number of
1897 arguments for an externally defined control method (a method in another
1898 table). Although this is an improvement, there is no deterministic way to
1899 "guess" the number of method arguments. Only the ACPI 6.0 External opcode
1900 will completely solve this problem as it is deployed (automatically) in
1903 iASL/Disassembler: Fixed an ordering issue for emitted External() ASL
1904 statements that could cause errors when the disassembled file is
1905 compiled. ACPICA BZ 1243. David Box.
1907 iASL: Fixed a regression caused by the merger of the two versions of the
1908 local strtoul64. Because of a dependency on a global variable, strtoul64
1909 could return an error for integers greater than a 32-bit value. ACPICA BZ
1912 iASL: Fixed a regression where a fault could occur for an ASL Return
1913 statement if it invokes a control method that is not resolved. ACPICA BZ
1916 AcpiXtract: Improved input file validation: detection of binary files and
1917 non-acpidump text files.
1919 ----------------------------------------
1920 12 February 2016. Summary of changes for version 20160212:
1922 1) ACPICA kernel-resident subsystem:
1924 Implemented full support for the ACPI 6.1 specification (released in
1925 January). This version of the specification is available at:
1926 http://www.uefi.org/specifications
1928 Only a relatively small number of changes were required in ACPICA to
1929 support ACPI 6.1, in these areas:
1930 - New predefined names
1932 - A new subtable for HEST
1933 - A few other header changes for new values
1935 Ensure \_SB_._INI is executed before any _REG methods are executed. There
1936 appears to be existing BIOS code that relies on this behavior. Lv Zheng.
1938 Reverted a change made in version 20151218 which enabled method
1939 invocations to be targets of various ASL operators (SuperName and Target
1940 grammar elements). While the new behavior is supported by the ACPI
1941 specification, other AML interpreters do not support this behavior and
1942 never will. The ACPI specification will be updated for ACPI 6.2 to remove
1943 this support. Therefore, the change was reverted to the original ACPICA
1946 ACPICA now supports the GCC 6 compiler.
1948 Current Release: (Note: build changes increased sizes)
1949 Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
1950 Debug Version: 200.4K Code, 82.0K Data, 282.4K Total
1952 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
1953 Debug Version: 200.4K Code, 81.9K Data, 282.3K Total
1956 2) iASL Compiler/Disassembler and Tools:
1958 Completed full support for the ACPI 6.0 External() AML opcode. The
1959 compiler emits an external AML opcode for each ASL External statement.
1960 This opcode is used by the disassembler to assist with the disassembly of
1961 external control methods by specifying the required number of arguments
1962 for the method. AML interpreters do not use this opcode. To ensure that
1963 interpreters do not even see the opcode, a block of one or more external
1964 opcodes is surrounded by an "If(0)" construct. As this feature becomes
1965 commonly deployed in BIOS code, the ability of disassemblers to correctly
1966 disassemble AML code will be greatly improved. David Box.
1968 iASL: Implemented support for an optional cross-reference output file.
1969 The -lx option will create a the cross-reference file with the suffix
1970 "xrf". Three different types of cross-reference are created in this file:
1971 - List of object references made from within each control method
1972 - Invocation (caller) list for each user-defined control method
1973 - List of references to each non-method object in the namespace
1975 iASL: Method invocations as ASL Target operands are now disallowed and
1976 flagged as errors in preparation for ACPI 6.2 (see the description of the
1979 ----------------------------------------
1980 8 January 2016. Summary of changes for version 20160108:
1982 1) ACPICA kernel-resident subsystem:
1984 Updated all ACPICA copyrights and signons to 2016: Added the 2016
1985 copyright to all source code module headers and utility/tool signons.
1986 This includes the standard Linux dual-license header. This affects
1987 virtually every file in the ACPICA core subsystem, iASL compiler, all
1988 ACPICA utilities, and the ACPICA test suite.
1990 Fixed a regression introduced in version 20151218 concerning the
1991 execution of so-called module-level ASL/AML code. Namespace objects
1992 created under a module-level If() construct were not properly/fully
1993 entered into the namespace and could cause an interpreter fault when
1996 Example Code and Data Size: These are the sizes for the OS-independent
1997 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1998 debug version of the code includes the debug output trace mechanism and
1999 has a much larger code and data size.
2002 Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
2003 Debug Version: 200.4K Code, 81.9K Data, 282.4K Total
2005 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
2006 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
2009 2) iASL Compiler/Disassembler and Tools:
2011 Fixed a problem with the compilation of the GpioIo and GpioInt resource
2012 descriptors. The _PIN field name was incorrectly defined to be an array
2013 of 32-bit values, but the _PIN values are in fact 16 bits each. This
2014 would cause incorrect bit width warnings when using Word (16-bit) fields
2015 to access the descriptors.
2018 ----------------------------------------
2019 18 December 2015. Summary of changes for version 20151218:
2021 1) ACPICA kernel-resident subsystem:
2023 Implemented per-AML-table execution of "module-level code" as individual
2024 ACPI tables are loaded into the namespace during ACPICA initialization.
2025 In other words, any module-level code within an AML table is executed
2026 immediately after the table is loaded, instead of batched and executed
2027 after all of the tables have been loaded. This provides compatibility
2028 with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng,
2031 To fully support the feature above, the default operation region handlers
2032 for the SystemMemory, SystemIO, and PCI_Config address spaces are now
2033 installed before any ACPI tables are loaded. This enables module-level
2034 code to access these address spaces during the table load and module-
2035 level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David
2038 Implemented several changes to the internal _REG support in conjunction
2039 with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples
2040 utilities for the changes above. Although these tools were changed, host
2041 operating systems that simply use the default handlers for SystemMemory,
2042 SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.
2044 For example, in the code below, DEV1 is conditionally added to the
2045 namespace by the DSDT via module-level code that accesses an operation
2046 region. The SSDT references DEV1 via the Scope operator. DEV1 must be
2047 created immediately after the DSDT is loaded in order for the SSDT to
2048 successfully reference DEV1. Previously, this code would cause an
2049 AE_NOT_EXIST exception during the load of the SSDT. Now, this code is
2050 fully supported by ACPICA.
2052 DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
2054 OperationRegion (OPR1, SystemMemory, 0x400, 32)
2055 Field (OPR1, AnyAcc, NoLock, Preserve)
2066 DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
2068 External (\DEV1, DeviceObj)
2074 Fixed an AML interpreter problem where control method invocations were
2075 not handled correctly when the invocation was itself a SuperName argument
2076 to another ASL operator. In these cases, the method was not invoked.
2077 ACPICA BZ 1002. Affects the following ASL operators that have a SuperName
2082 Decrement, Increment
2085 Signal, Release, Reset
2088 Implemented automatic String-to-ObjectReference conversion support for
2089 packages returned by predefined names (such as _DEP). A common BIOS error
2090 is to add double quotes around an ObjectReference namepath, which turns
2091 the reference into an unexpected string object. This support detects the
2092 problem and corrects it before the package is returned to the caller that
2093 invoked the method. Lv Zheng.
2095 Implemented extensions to the Concatenate operator. Concatenate now
2096 accepts any type of object, it is not restricted to simply
2097 Integer/String/Buffer. For objects other than these 3 basic data types,
2098 the argument is treated as a string containing the name of the object
2099 type. This expands the utility of Concatenate and the Printf/Fprintf
2100 macros. ACPICA BZ 1222.
2102 Cleaned up the output of the ASL Debug object. The timer() value is now
2103 optional and no longer emitted by default. Also, the basic data types of
2104 Integer/String/Buffer are simply emitted as their values, without a data
2105 type string -- since the data type is obvious from the output. ACPICA BZ
2108 Example Code and Data Size: These are the sizes for the OS-independent
2109 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2110 debug version of the code includes the debug output trace mechanism and
2111 has a much larger code and data size.
2114 Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
2115 Debug Version: 200.3K Code, 81.9K Data, 282.3K Total
2117 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
2118 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
2121 2) iASL Compiler/Disassembler and Tools:
2123 iASL: Fixed some issues with the ASL Include() operator. This operator
2124 was incorrectly defined in the iASL parser rules, causing a new scope to
2125 be opened for the code within the include file. This could lead to
2126 several issues, including allowing ASL code that is technically illegal
2127 and not supported by AML interpreters. Note, this does not affect the
2128 related #include preprocessor operator. ACPICA BZ 1212.
2130 iASL/Disassembler: Implemented support for the ASL ElseIf operator. This
2131 operator is essentially an ASL macro since there is no AML opcode
2132 associated with it. The code emitted by the iASL compiler for ElseIf is
2133 an Else opcode followed immediately by an If opcode. The disassembler
2134 will now emit an ElseIf if it finds an Else immediately followed by an
2135 If. This simplifies the decoded ASL, especially for deeply nested
2136 If..Else and large Switch constructs. Thus, the disassembled code more
2137 closely follows the original source ASL. ACPICA BZ 1211. Example:
2149 ElseIf (Arg0 == 0x02)
2154 AcpiExec: Added support for the new module level code behavior and the
2155 early region installation. This required a small change to the
2156 initialization, since AcpiExec must install its own operation region
2159 AcpiExec: Added support to make the debug object timer optional. Default
2160 is timer disabled. This cleans up the debug object output -- the timer
2161 data is rarely used.
2163 AcpiExec: Multiple ACPI tables are now loaded in the order that they
2164 appear on the command line. This can be important when there are
2165 interdependencies/references between the tables.
2167 iASL/Templates. Add support to generate template files with multiple
2168 SSDTs within a single output file. Also added ommand line support to
2169 specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ
2173 ----------------------------------------
2174 24 November 2015. Summary of changes for version 20151124:
2176 1) ACPICA kernel-resident subsystem:
2178 Fixed a possible regression for a previous update to FADT handling. The
2179 FADT no longer has a fixed table ID, causing some issues with code that
2180 was hardwired to a specific ID. Lv Zheng.
2182 Fixed a problem where the method auto-serialization could interfere with
2183 the current SyncLevel. This change makes the auto-serialization support
2184 transparent to the SyncLevel support and management.
2186 Removed support for the _SUB predefined name in AcpiGetObjectInfo. This
2187 interface is intended for early access to the namespace during the
2188 initial namespace device discovery walk. The _SUB method has been seen to
2189 access operation regions in some cases, causing errors because the
2190 operation regions are not fully initialized.
2192 AML Debugger: Fixed some issues with the terminate/quit/exit commands
2193 that can cause faults. Lv Zheng.
2195 AML Debugger: Add thread ID support so that single-step mode only applies
2196 to the AML Debugger thread. This prevents runtime errors within some
2199 Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx
2200 methods that are invoked by this interface are optional, removed warnings
2201 emitted for the case where one or more of these methods do not exist.
2202 ACPICA BZ 1208, original change by Prarit Bhargava.
2204 Made a major pass through the entire ACPICA source code base to
2205 standardize formatting that has diverged a bit over time. There are no
2206 functional changes, but this will of course cause quite a few code
2207 differences from the previous ACPICA release.
2209 Example Code and Data Size: These are the sizes for the OS-independent
2210 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2211 debug version of the code includes the debug output trace mechanism and
2212 has a much larger code and data size.
2215 Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
2216 Debug Version: 199.6K Code, 81.8K Data, 281.4K Total
2218 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2219 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
2222 2) iASL Compiler/Disassembler and Tools:
2224 iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple
2225 definition blocks within a single ASL file and the resulting AML file.
2226 Support for this type of file was also added to the various tools that
2227 use binary AML files: acpiexec, acpixtract, and the AML disassembler. The
2228 example code below shows two definition blocks within the same file:
2230 DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template",
2234 DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
2238 iASL: Enhanced typechecking for the Name() operator. All expressions for
2239 the value of the named object must be reduced/folded to a single constant
2240 at compile time, as per the ACPI specification (the AML definition of
2243 iASL: Fixed some code indentation issues for the -ic and -ia options (C
2244 and assembly headers). Now all emitted code correctly begins in column 1.
2246 iASL: Added an error message for an attempt to open a Scope() on an
2247 object defined in an SSDT. The DSDT is always loaded into the namespace
2248 first, so any attempt to open a Scope on an SSDT object will fail at
2252 ----------------------------------------
2253 30 September 2015. Summary of changes for version 20150930:
2255 1) ACPICA kernel-resident subsystem:
2257 Debugger: Implemented several changes and bug fixes to assist support for
2258 the in-kernel version of the AML debugger. Lv Zheng.
2259 - Fix the "predefined" command for in-kernel debugger.
2260 - Do not enter debug command loop for the help and version commands.
2261 - Disallow "execute" command during execution/single-step of a method.
2263 Interpreter: Updated runtime typechecking for all operators that have
2264 target operands. The operand is resolved and validated that it is legal.
2265 For example, the target cannot be a non-data object such as a Device,
2266 Mutex, ThermalZone, etc., as per the ACPI specification.
2268 Debugger: Fixed the double-mutex user I/O handshake to work when local
2269 deadlock detection is enabled.
2271 Debugger: limited display of method locals and arguments (LocalX and
2272 ArgX) to only those that have actually been initialized. This prevents
2273 lines of extraneous output.
2275 Updated the definition of the NFIT table to correct the bit polarity of
2276 one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED
2278 Example Code and Data Size: These are the sizes for the OS-independent
2279 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2280 debug version of the code includes the debug output trace mechanism and
2281 has a much larger code and data size.
2284 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2285 Debug Version: 199.3K Code, 81.4K Data, 280.7K Total
2287 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
2288 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
2291 2) iASL Compiler/Disassembler and Tools:
2293 iASL: Improved the compile-time typechecking for operands of many of the
2296 -- Added an option to disable compiler operand/operator typechecking (-
2299 -- For the following operators, the TermArg operands are now validated
2300 when possible to be Integer data objects: BankField, OperationRegion,
2301 DataTableRegion, Buffer, and Package.
2303 -- Store (Source, Target): Both the source and target operands are
2304 resolved and checked that the operands are both legal. For example,
2305 neither operand can be a non-data object such as a Device, Mutex,
2306 ThermalZone, etc. Note, as per the ACPI specification, the CopyObject
2307 operator can be used to store an object to any type of target object.
2309 -- Store (Source, Target): If the source is a Package object, the target
2310 must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target
2311 is a Package, the source must also be a Package.
2313 -- Store (Source, Target): A warning is issued if the source and target
2314 resolve to the identical named object.
2316 -- Store (Source, <method invocation>): An error is generated for the
2317 target method invocation, as this construct is not supported by the AML
2320 -- For all ASL math and logic operators, the target operand must be a
2321 data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This
2322 includes the function return value also.
2324 -- External declarations are also included in the typechecking where
2325 possible. External objects defined using the UnknownObj keyword cannot be
2326 typechecked, however.
2328 iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index
2330 - Legacy code: Index(PKG1, 3)
2331 - New ASL+ code: PKG1[3]
2332 This completes the ACPI 6.0 ASL+ support as it was the only operator not
2335 iASL: Fixed the file suffix for the preprocessor output file (.i). Two
2336 spaces were inadvertently appended to the filename, causing file access
2337 and deletion problems on some systems.
2339 ASL Test Suite (ASLTS): Updated the master makefile to generate all
2340 possible compiler output files when building the test suite -- thus
2341 exercising these features of the compiler. These files are automatically
2342 deleted when the test suite exits.
2345 ----------------------------------------
2346 18 August 2015. Summary of changes for version 20150818:
2348 1) ACPICA kernel-resident subsystem:
2350 Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv
2351 Zheng. ACPICA BZ 1186.
2353 Completed development to ensure that the ACPICA Disassembler and Debugger
2354 are fully standalone components of ACPICA. Removed cross-component
2355 dependences. Lv Zheng.
2357 The max-number-of-AML-loops is now runtime configurable (previously was
2358 compile-time only). This is essentially a loop timeout to force-abort
2359 infinite AML loops. ACPCIA BZ 1192.
2361 Debugger: Cleanup output to dump ACPI names and namepaths without any
2362 trailing underscores. Lv Zheng. ACPICA BZ 1135.
2364 Removed unnecessary conditional compilations across the Debugger and
2365 Disassembler components where entire modules could be left uncompiled.
2367 The aapits test is deprecated and has been removed from the ACPICA git
2368 tree. The test has never been completed and has not been maintained, thus
2369 becoming rather useless. ACPICA BZ 1015, 794.
2371 A batch of small changes to close bugzilla and other reports:
2372 - Remove duplicate code for _PLD processing. ACPICA BZ 1176.
2373 - Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
2374 - iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
2375 - ACPI table support: general cleanup and simplification. Lv Zheng, Bob
2377 - ACPI table support: fix for a buffer read overrun in AcpiTbFindTable.
2379 - Enhance parameter validation for DataTableRegion and LoadTable ASL/AML
2381 - Debugger: Split debugger initialization/termination interfaces. Lv
2383 - AcpiExec: Emit OemTableId for SSDTs during the load phase for table
2385 - AcpiExec: Add debug message during _REG method phase during table
2387 - AcpiNames: Fix a regression where some output was missing and no longer
2389 - Debugger: General cleanup and simplification. Lv Zheng.
2390 - Disassembler: Cleanup use of several global option variables. Lv Zheng.
2392 Example Code and Data Size: These are the sizes for the OS-independent
2393 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2394 debug version of the code includes the debug output trace mechanism and
2395 has a much larger code and data size.
2398 Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
2399 Debug Version: 198.6K Code, 80.9K Data, 279.5K Total
2401 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2402 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
2405 2) iASL Compiler/Disassembler and Tools:
2407 AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT
2408 were not handled properly and caused load errors. Now, properly invoke
2409 and use the ACPICA auto-reallocate mechanism for ACPI table data
2410 structures. ACPICA BZ 1188
2412 AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA
2415 AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For
2416 AcpiExec, this means that no control methods (like _REG/_INI/_STA) are
2417 executed during initialization. ACPICA BZ 1187, 1189.
2419 iASL/Disassembler: Implemented a prototype "listing" mode that emits AML
2420 that corresponds to each disassembled ASL statement, to simplify
2421 debugging. ACPICA BZ 1191.
2423 Debugger: Add option to the "objects" command to display a summary of the
2424 current namespace objects (Object type and count). This is displayed if
2425 the command is entered with no arguments.
2427 AcpiNames: Add -x option to specify debug level, similar to AcpiExec.
2430 ----------------------------------------
2431 17 July 2015. Summary of changes for version 20150717:
2433 1) ACPICA kernel-resident subsystem:
2435 Improved the partitioning between the Debugger and Disassembler
2436 components. This allows the Debugger to be used standalone within kernel
2437 code without the Disassembler (which is used for single stepping also).
2438 This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.
2440 Debugger: Implemented a new command to trace the execution of control
2441 methods (Trace). This is especially useful for the in-kernel version of
2442 the debugger when file I/O may not be available for method trace output.
2443 See the ACPICA reference for more information. Lv Zheng.
2445 Moved all C library prototypes (used for the local versions of these
2446 functions when requested) to a new header, acclib.h
2447 Cleaned up the use of non-ANSI C library functions. These functions are
2448 implemented locally in ACPICA. Moved all such functions to a common
2449 source file, utnonansi.c
2451 Debugger: Fixed a problem with the "!!" command (get last command
2452 executed) where the debugger could enter an infinite loop and eventually
2455 Removed the use of local macros that were used for some of the standard C
2456 library functions to automatically cast input parameters. This mostly
2457 affected the is* functions where the input parameter is defined to be an
2458 int. This required a few modifications to the main ACPICA source code to
2459 provide casting for these functions and eliminate possible compiler
2460 warnings for these parameters.
2462 Across the source code, added additional status/error checking to resolve
2463 issues discovered by static source code analysis tools such as Coverity.
2465 Example Code and Data Size: These are the sizes for the OS-independent
2466 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2467 debug version of the code includes the debug output trace mechanism and
2468 has a much larger code and data size.
2471 Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2472 Debug Version: 197.8K Code, 81.5K Data, 279.3K Total
2474 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2475 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
2478 2) iASL Compiler/Disassembler and Tools:
2480 iASL: Fixed a regression where the device map file feature no longer
2481 worked properly when used in conjunction with the disassembler. It only
2482 worked properly with the compiler itself.
2484 iASL: Implemented a new warning for method LocalX variables that are set
2485 but never used (similar to a C compiler such as gcc). This also applies
2486 to ArgX variables that are not defined by the parent method, and are
2487 instead (legally) used as local variables.
2489 iASL/Preprocessor: Finished the pass-through of line numbers from the
2490 preprocessor to the compiler. This ensures that compiler errors/warnings
2491 have the correct original line numbers and filenames, regardless of any
2494 iASL/Preprocessor: Fixed a couple of issues with comment handling and the
2495 pass-through of comments to the preprocessor output file (which becomes
2496 the compiler input file). Also fixed a problem with // comments that
2497 appear after a math expression.
2499 iASL: Added support for the TCPA server table to the table compiler and
2500 template generator. (The client table was already previously supported)
2502 iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to
2503 identify the iASL compiler.
2505 Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined
2506 multiple times. The new names are ACPI_SIGN_NEGATIVE and
2509 AcpiHelp: Update to expand help messages for the iASL preprocessor
2513 ----------------------------------------
2514 19 June 2015. Summary of changes for version 20150619:
2516 Two regressions in version 20150616 have been addressed:
2518 Fixes some problems/issues with the C library macro removal (ACPI_STRLEN,
2519 etc.) This update changes ACPICA to only use the standard headers for
2520 functions, or the prototypes for the local versions of the C library
2521 functions. Across the source code, this required some additional casts
2522 for some Clib invocations for portability. Moved all local prototypes to
2523 a new file, acclib.h
2525 Fixes several problems with recent changes to the handling of the FACS
2526 table that could cause some systems not to boot.
2529 ----------------------------------------
2530 16 June 2015. Summary of changes for version 20150616:
2533 1) ACPICA kernel-resident subsystem:
2535 Across the entire ACPICA source code base, the various macros for the C
2536 library functions (such as ACPI_STRLEN, etc.) have been removed and
2537 replaced by the standard C library names (strlen, etc.) The original
2538 purpose for these macros is no longer applicable. This simplification
2539 reduces the number of macros used in the ACPICA source code
2540 significantly, improving readability and maintainability.
2542 Implemented support for a new ACPI table, the OSDT. This table, the
2543 "override" SDT, can be loaded directly by the host OS at boot time. It
2544 enables the replacement of existing namespace objects that were installed
2545 via the DSDT and/or SSDTs. The primary purpose for this is to replace
2546 buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated
2547 for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob
2550 Added support for systems with (improperly) two FACS tables -- a "32-bit"
2551 table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit
2552 X field). This change will support both automatically. There continues to
2553 be systems found with this issue. This support requires a change to the
2554 AcpiSetFirmwareWakingVector interface. Also, a public global variable has
2555 been added to allow the host to select which FACS is desired
2556 (AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more
2559 Added a new feature to allow for systems that do not contain an FACS.
2560 Although this is already supported on hardware-reduced platforms, the
2561 feature has been extended for all platforms. The reasoning is that we do
2562 not want to abort the entire ACPICA initialization just because the
2563 system is seriously buggy and has no FACS.
2565 Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were
2566 not correctly transcribed from the ACPI specification in ACPICA version
2569 Implemented support for the _CLS object in the AcpiGetObjectInfo external
2572 Updated the definitions of the TCPA and TPM2 ACPI tables to the more
2573 recent TCG ACPI Specification, December 14, 2014. Table disassembler and
2574 compiler also updated. Note: The TCPA "server" table is not supported by
2575 the disassembler/table-compiler at this time.
2577 ACPI 6.0: Added definitions for the new GIC version field in the MADT.
2579 Example Code and Data Size: These are the sizes for the OS-independent
2580 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2581 debug version of the code includes the debug output trace mechanism and
2582 has a much larger code and data size.
2585 Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2586 Debug Version: 196.2K Code, 81.0K Data, 277.2K Total
2588 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
2589 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
2592 2) iASL Compiler/Disassembler and Tools:
2594 Disassembler: Fixed a problem with the new symbolic operator disassembler
2595 where incorrect ASL code could be emitted in some cases for the "non-
2596 commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and
2597 ShiftRight. The actual problem cases seem to be rather unusual in common
2598 ASL code, however. David Box.
2600 Modified the linux version of acpidump to obtain ACPI tables from not
2601 just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv
2604 iASL: Fixed a problem where the user preprocessor output file (.i)
2605 contained extra data that was not expected. The compiler was using this
2606 file as a temporary file and passed through #line directives in order to
2607 keep compiler error messages in sync with the input file and line number
2608 across multiple include files. The (.i) is no longer a temporary file as
2609 the compiler uses a new, different file for the original purpose.
2611 iASL: Fixed a problem where comments within the original ASL source code
2612 file were not passed through to the preprocessor output file, nor any
2615 iASL: Fixed some issues for the handling of the "#include" preprocessor
2616 directive and the similar (but not the same) "Include" ASL operator.
2618 iASL: Add support for the new OSDT in both the disassembler and compiler.
2620 iASL: Fixed a problem with the constant folding support where a Buffer
2621 object could be incorrectly generated (incorrectly formed) during a
2622 conversion to a Store() operator.
2624 AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new
2625 description text for the _REV predefined name. _REV now permanently
2626 returns 2, as per the ACPI 6.0 specification.
2628 Debugger: Enhanced the output of the Debug ASL object for references
2629 produced by the Index operator. For Buffers and strings, only output the
2630 actual byte pointed to by the index. For packages, only print the single
2631 package element decoded by the index. Previously, the entire
2632 buffer/string/package was emitted.
2634 iASL/Table-compiler: Fixed a regression where the "generic" data types
2635 were no longer recognized, causing errors.
2638 ----------------------------------------
2639 15 May 2015. Summary of changes for version 20150515:
2641 This release implements most of ACPI 6.0 as described below.
2643 1) ACPICA kernel-resident subsystem:
2645 Implemented runtime argument checking and return value checking for all
2646 new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI,
2647 _MTL, _PRR, _RDI, _RST, _TFP, _TSN.
2649 Example Code and Data Size: These are the sizes for the OS-independent
2650 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2651 debug version of the code includes the debug output trace mechanism and
2652 has a much larger code and data size.
2655 Non-Debug Version: 99.9K Code, 27.5K Data, 127.4K Total
2656 Debug Version: 195.2K Code, 80.8K Data, 276.0K Total
2658 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
2659 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
2662 2) iASL Compiler/Disassembler and Tools:
2664 iASL compiler: Added compile-time support for all new ACPI 6.0 predefined
2665 names (argument count validation and return value typechecking.)
2667 iASL disassembler and table compiler: implemented support for all new
2668 ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV.
2670 iASL disassembler and table compiler: Added ACPI 6.0 changes to existing
2673 iASL preprocessor: Added a new directive to enable inclusion of binary
2674 blobs into ASL code. The new directive is #includebuffer. It takes a
2675 binary file as input and emits a named ascii buffer object into the ASL
2678 AcpiHelp: Added support for all new ACPI 6.0 predefined names.
2680 AcpiHelp: Added a new option, -d, to display all iASL preprocessor
2683 AcpiHelp: Added a new option, -t, to display all known/supported ACPI
2687 ----------------------------------------
2688 10 April 2015. Summary of changes for version 20150410:
2690 Reverted a change introduced in version 20150408 that caused
2691 a regression in the disassembler where incorrect operator
2692 symbols could be emitted.
2695 ----------------------------------------
2696 08 April 2015. Summary of changes for version 20150408:
2699 1) ACPICA kernel-resident subsystem:
2701 Permanently set the return value for the _REV predefined name. It now
2702 returns 2 (was 5). This matches other ACPI implementations. _REV will be
2703 deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2
2704 for ACPI 2.0 and later. It should never be used to differentiate or
2705 identify operating systems.
2707 Added the "Windows 2015" string to the _OSI support. ACPICA will now
2708 return TRUE to a query with this string.
2710 Fixed several issues with the local version of the printf function.
2712 Added the C99 compiler option (-std=c99) to the Unix makefiles.
2715 Non-Debug Version: 99.9K Code, 27.4K Data, 127.3K Total
2716 Debug Version: 195.2K Code, 80.7K Data, 275.9K Total
2718 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
2719 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
2722 2) iASL Compiler/Disassembler and Tools:
2724 iASL: Implemented an enhancement to the constant folding feature to
2725 transform the parse tree to a simple Store operation whenever possible:
2726 Add (2, 3, X) ==> is converted to: Store (5, X)
2727 X = 2 + 3 ==> is converted to: Store (5, X)
2729 Updated support for the SLIC table (Software Licensing Description Table)
2730 in both the Data Table compiler and the disassembler. The SLIC table
2731 support now conforms to "Microsoft Software Licensing Tables (SLIC and
2732 MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data
2733 following the ACPI header is now defined to be "Proprietary Data", and as
2734 such, can only be entered or displayed as a hex data block.
2736 Implemented full support for the MSDM table as described in the document
2737 above. Note: The format of MSDM is similar to SLIC. Any MSDM data
2738 following the ACPI header is defined to be "Proprietary Data", and can
2739 only be entered or displayed as a hex data block.
2741 Implemented the -Pn option for the iASL Table Compiler (was only
2742 implemented for the ASL compiler). This option disables the iASL
2745 Disassembler: For disassembly of Data Tables, added a comment field
2746 around the Ascii equivalent data that is emitted as part of the "Raw
2747 Table Data" block. This prevents the iASL Preprocessor from possible
2748 confusion if/when the table is compiled.
2750 Disassembler: Added an option (-df) to force the disassembler to assume
2751 that the table being disassembled contains valid AML. This feature is
2752 useful for disassembling AML files that contain ACPI signatures other
2753 than DSDT or SSDT (such as OEMx or other signatures).
2755 Changes for the EFI version of the tools:
2756 1) Fixed a build error/issue
2757 2) Fixed a cast warning
2759 iASL: Fixed a path issue with the __FILE__ operator by making the
2760 directory prefix optional within the internal SplitInputFilename
2763 Debugger: Removed some unused global variables.
2765 Tests: Updated the makefile for proper generation of the AAPITS suite.
2768 ----------------------------------------
2769 04 February 2015. Summary of changes for version 20150204:
2771 ACPICA kernel-resident subsystem:
2773 Updated all ACPICA copyrights and signons to 2014. Added the 2014
2774 copyright to all module headers and signons, including the standard Linux
2775 header. This affects virtually every file in the ACPICA core subsystem,
2776 iASL compiler, all ACPICA utilities, and the test suites.
2778 Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
2779 A raw gpe handling mechanism was created to allow better handling of GPE
2780 storms that aren't easily managed by the normal handler. The raw handler
2781 allows disabling/renabling of the the GPE so that interrupt storms can be
2782 avoided in cases where events cannot be timely serviced. In this
2783 scenario, handlers should use the AcpiSetGpe() API to disable/enable the
2784 GPE. This API will leave the reference counts undisturbed, thereby
2785 preventing unintentional clearing of the GPE when the intent in only to
2786 temporarily disable it. Raw handlers allow enabling and disabling of a
2787 GPE by removing GPE register locking. As such, raw handlers much provide
2788 their own locks while using GPE API's to protect access to GPE data
2792 Events: Always modify GPE registers under the GPE lock.
2793 Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
2794 values. Reported as bug by joe.liu@apple.com.
2796 Unix makefiles: Separate option to disable optimizations and
2797 _FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the
2798 NOOPT disable option and creates a separate flag (NOFORTIFY) for this
2799 purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined
2800 errors when building ACPICA. This allows disabling the option without
2801 also having to disable optimazations.
2805 Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2806 Debug Version: 199.2K Code, 82.4K Data, 281.6K Total
2809 --------------------------------------
2810 07 November 2014. Summary of changes for version 20141107:
2812 This release is available at https://acpica.org/downloads
2814 This release introduces and implements language extensions to ASL that
2815 provide support for symbolic ("C-style") operators and expressions. These
2816 language extensions are known collectively as ASL+.
2819 1) iASL Compiler/Disassembler and Tools:
2821 Disassembler: Fixed a problem with disassembly of the UartSerialBus
2822 macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E.
2825 Disassembler: Fixed the Unicode macro support to add escape sequences.
2826 All non-printable ASCII values are emitted as escape sequences, as well
2827 as the standard escapes for quote and backslash. Ensures that the
2828 disassembled macro can be correctly recompiled.
2830 iASL: Added Printf/Fprintf macros for formatted output. These macros are
2831 translated to existing AML Concatenate and Store operations. Printf
2832 writes to the ASL Debug object. Fprintf allows the specification of an
2833 ASL name as the target. Only a single format specifier is required, %o,
2834 since the AML interpreter dynamically converts objects to the required
2837 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
2838 (Concatenate (Concatenate (Concatenate ("", Arg0),
2839 ": Unexpected value for "), Arg1), ", "), Arg2),
2840 " at line "), Arg3), Debug)
2842 (new) Printf ("%o: Unexpected value for %o, %o at line %o",
2843 Arg0, Arg1, Arg2, Arg3)
2845 (old) Store (Concatenate (Concatenate (Concatenate (Concatenate
2846 ("", Arg1), ": "), Arg0), " Successful"), STR1)
2848 (new) Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)
2850 iASL: Added debug options (-bp, -bt) to dynamically prune levels of the
2851 ASL parse tree before the AML code is generated. This allows blocks of
2852 ASL code to be removed in order to help locate and identify problem
2853 devices and/or code. David E. Box.
2855 AcpiExec: Added support (-fi) for an optional namespace object
2856 initialization file. This file specifies initial values for namespace
2857 objects as necessary for debugging and testing different ASL code paths
2858 that may be taken as a result of BIOS options.
2861 2) Overview of symbolic operator support for ASL (ASL+)
2862 -------------------------------------------------------
2864 As an extension to the ASL language, iASL implements support for symbolic
2865 (C-style) operators for math and logical expressions. This can greatly
2866 simplify ASL code as well as improve both readability and
2867 maintainability. These language extensions can exist concurrently with
2868 all legacy ASL code and expressions.
2870 The symbolic extensions are 100% compatible with existing AML
2871 interpreters, since no new AML opcodes are created. To implement the
2872 extensions, the iASL compiler transforms the symbolic expressions into
2873 the legacy ASL/AML equivalents at compile time.
2875 Full symbolic expressions are supported, along with the standard C
2876 precedence and associativity rules.
2878 Full disassembler support for the symbolic expressions is provided, and
2879 creates an automatic migration path for existing ASL code to ASL+ code
2880 via the disassembly process. By default, the disassembler now emits ASL+
2881 code with symbolic expressions. An option (-dl) is provided to force the
2882 disassembler to emit legacy ASL code if desired.
2884 Below is the complete list of the currently supported symbolic operators
2885 with examples. See the iASL User Guide for additional information.
2888 ASL+ Syntax Legacy ASL Equivalent
2889 ----------- ---------------------
2893 Z = X + Y Add (X, Y, Z)
2894 Z = X - Y Subtract (X, Y, Z)
2895 Z = X * Y Multiply (X, Y, Z)
2896 Z = X / Y Divide (X, Y, , Z)
2897 Z = X % Y Mod (X, Y, Z)
2898 Z = X << Y ShiftLeft (X, Y, Z)
2899 Z = X >> Y ShiftRight (X, Y, Z)
2900 Z = X & Y And (X, Y, Z)
2901 Z = X | Y Or (X, Y, Z)
2902 Z = X ^ Y Xor (X, Y, Z)
2907 // Logical operators
2909 (X == Y) LEqual (X, Y)
2910 (X != Y) LNotEqual (X, Y)
2911 (X < Y) LLess (X, Y)
2912 (X > Y) LGreater (X, Y)
2913 (X <= Y) LLessEqual (X, Y)
2914 (X >= Y) LGreaterEqual (X, Y)
2915 (X && Y) LAnd (X, Y)
2919 // Assignment and compound assignment operations
2922 X += Y Add (X, Y, X)
2923 X -= Y Subtract (X, Y, X)
2924 X *= Y Multiply (X, Y, X)
2925 X /= Y Divide (X, Y, , X)
2926 X %= Y Mod (X, Y, X)
2927 X <<= Y ShiftLeft (X, Y, X)
2928 X >>= Y ShiftRight (X, Y, X)
2929 X &= Y And (X, Y, X)
2931 X ^= Y Xor (X, Y, X)
2938 If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
2939 And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530,
2941 0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
2943 And (MEMB, 0xFFFFFFF0, SRMB)
2944 Store (MEMB, Local2)
2945 Store (PDBM, Local1)
2946 And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
2948 Or (PDBM, 0x02, PDBM)
2952 If (((R510 & 0x03FB) == 0x02E0) ||
2953 ((R520 & 0x03FB) == 0x02E0) ||
2954 ((R530 & 0x03FB) == 0x02E0) ||
2955 ((R540 & 0x03FB) == 0x02E0))
2957 SRMB = (MEMB & 0xFFFFFFF0)
2960 PDBM &= 0xFFFFFFFFFFFFFFF9
2966 Store (0x1234, Local1)
2967 Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
2968 Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
2969 Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
2970 Store (Index (PKG1, 0x03), Local6)
2971 Store (Add (Local3, Local2), Debug)
2972 Add (Local1, 0x0F, Local2)
2973 Add (Local1, Multiply (Local2, Local3), Local2)
2974 Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)
2978 Local3 = (((Local1 + TEST) + 0x20) * Local2)
2979 Local3 = (Local2 * ((Local1 + TEST) + 0x20))
2980 Local3 = (Local1 + (TEST + (0x20 * Local2)))
2981 Local6 = Index (PKG1, 0x03)
2982 Debug = (Local3 + Local2)
2983 Local2 = (Local1 + 0x0F)
2984 Local2 = (Local1 + (Local2 * Local3))
2985 Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))
2988 ----------------------------------------
2989 26 September 2014. Summary of changes for version 20140926:
2991 1) ACPICA kernel-resident subsystem:
2993 Updated the GPIO operation region handler interface (GeneralPurposeIo).
2994 In order to support GPIO Connection objects with multiple pins, along
2995 with the related Field objects, the following changes to the interface
2996 have been made: The Address is now defined to be the offset in bits of
2997 the field unit from the previous invocation of a Connection. It can be
2998 viewed as a "Pin Number Index" into the connection resource descriptor.
2999 The BitWidth is the exact bit width of the field. It is usually one bit,
3000 but not always. See the ACPICA reference guide (section 8.8.6.2.1) for
3001 additional information and examples.
3003 GPE support: During ACPICA/GPE initialization, ensure that all GPEs with
3004 corresponding _Lxx/_Exx methods are disabled (they may have been enabled
3005 by the firmware), so that they cannot fire until they are enabled via
3006 AcpiUpdateAllGpes. Rafael J. Wysocki.
3008 Added a new return flag for the Event/GPE status interfaces --
3009 AcpiGetEventStatus and AcpiGetGpeStatus. The new
3010 ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or
3011 GPE currently has a handler associated with it, and can thus actually
3012 affect the system. Lv Zheng.
3014 Example Code and Data Size: These are the sizes for the OS-independent
3015 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3016 debug version of the code includes the debug output trace mechanism and
3017 has a much larger code and data size.
3020 Non-Debug Version: 99.1K Code, 27.3K Data, 126.4K Total
3021 Debug Version: 192.8K Code, 79.9K Data, 272.7K Total
3023 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
3024 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
3026 2) iASL Compiler/Disassembler and Tools:
3028 iASL: Fixed a memory allocation/free regression introduced in 20140828
3029 that could cause the compiler to crash. This was introduced inadvertently
3030 during the effort to eliminate compiler memory leaks. ACPICA BZ 1111,
3033 iASL: Removed two error messages that have been found to create false
3034 positives, until they can be fixed and fully validated (ACPICA BZ 1112):
3035 1) Illegal forward reference within a method
3036 2) Illegal reference across two methods
3038 iASL: Implemented a new option (-lm) to create a hardware mapping file
3039 that summarizes all GPIO, I2C, SPI, and UART connections. This option
3040 works for both the compiler and disassembler. See the iASL compiler user
3041 guide for additional information and examples (section 6.4.6).
3043 AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to
3044 version 2. This corrects the AE_BAD_HEADER exception seen on systems with
3045 a version 1 RSDP. Lv Zheng ACPICA BZ 1097.
3047 AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode
3048 unless STDIN is actually a terminal. Assists with batch-mode processing.
3051 Disassembler/AcpiHelp: Added another large group of recognized _HID
3055 ----------------------------------------
3056 28 August 2014. Summary of changes for version 20140828:
3058 1) ACPICA kernel-resident subsystem:
3060 Fixed a problem related to the internal use of the Timer() operator where
3061 a 64-bit divide could cause an attempted link to a double-precision math
3062 library. This divide is not actually necessary, so the code was
3063 restructured to eliminate it. Lv Zheng.
3065 ACPI 5.1: Added support for the runtime validation of the _DSD package
3066 (similar to the iASL support).
3068 ACPI 5.1/Headers: Added support for the GICC affinity subtable to the
3069 SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.
3071 Example Code and Data Size: These are the sizes for the OS-independent
3072 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3073 debug version of the code includes the debug output trace mechanism and
3074 has a much larger code and data size.
3077 Non-Debug Version: 98.8K Code, 27.3K Data, 126.1K Total
3078 Debug Version: 192.1K Code, 79.8K Data, 271.9K Total
3080 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total1
3081 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
3083 2) iASL Compiler/Disassembler and Tools:
3085 AcpiExec: Fixed a problem on unix systems where the original terminal
3086 state was not always properly restored upon exit. Seen when using the -v
3087 option. ACPICA BZ 1104.
3089 iASL: Fixed a problem with the validation of the ranges/length within the
3090 Memory24 resource descriptor. There was a boundary condition when the
3091 range was equal to the (length -1) caused by the fact that these values
3092 are defined in 256-byte blocks, not bytes. ACPICA BZ 1098
3094 Disassembler: Fixed a problem with the GpioInt descriptor interrupt
3096 flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword
3098 now supported properly.
3100 ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported
3101 in the disassembler, data table compiler, and table template generator.
3103 iASL: Added a requirement for Device() objects that one of either a _HID
3104 or _ADR must exist within the scope of a Device, as per the ACPI
3105 specification. Remove a similar requirement that was incorrectly in place
3106 for the _DSD object.
3108 iASL: Added error detection for illegal named references within control
3109 methods that would cause runtime failures. Now trapped as errors are: 1)
3110 References to objects within a non-parent control method. 2) Forward
3111 references (within a method) -- for control methods, AML interpreters use
3112 a one-pass parse of control methods. ACPICA BZ 1008.
3114 iASL: Added error checking for dependencies related to the _PSx power
3115 methods. ACPICA BZ 1029.
3116 1) For _PS0, one of these must exist within the same scope: _PS1, _PS2,
3118 2) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same
3121 iASL and table compiler: Cleanup miscellaneous memory leaks by fully
3122 deploying the existing object and string caches and adding new caches for
3125 iASL: Split the huge parser source file into multiple subfiles to improve
3126 manageability. Generation now requires the M4 macro preprocessor, which
3127 is part of the Bison distribution on both unix and windows platforms.
3129 AcpiSrc: Fixed and removed all extraneous warnings generated during
3130 entire ACPICA source code scan and/or conversion.
3133 ----------------------------------------
3135 24 July 2014. Summary of changes for version 20140724:
3137 The ACPI 5.1 specification has been released and is available at:
3138 http://uefi.org/specs/access
3141 0) ACPI 5.1 support in ACPICA:
3143 ACPI 5.1 is fully supported in ACPICA as of this release.
3145 New predefined names. Support includes iASL and runtime ACPICA
3147 _CCA (Cache Coherency Attribute).
3148 _DSD (Device-Specific Data). David Box.
3150 Modifications to existing ACPI tables. Support includes headers, iASL
3151 Data Table compiler, disassembler, and the template generator.
3152 FADT - New fields and flags. Graeme Gregory.
3153 GTDT - One new subtable and new fields. Tomasz Nowicki.
3154 MADT - Two new subtables. Tomasz Nowicki.
3155 PCCT - One new subtable.
3158 New notification type for System Resource Affinity change events.
3161 1) ACPICA kernel-resident subsystem:
3163 Fixed a regression introduced in 20140627 where a fault can happen during
3164 the deletion of Alias AML namespace objects. The problem affected both
3165 the core ACPICA and the ACPICA tools including iASL and AcpiExec.
3167 Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a
3168 simple mechanism to enable wake GPEs that have no associated handler or
3169 control method. Rafael Wysocki.
3171 Updated the AcpiEnableGpe interface to disallow the enable if there is no
3172 handler or control method associated with the particular GPE. This will
3173 help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
3175 Updated GPE handling and dispatch by disabling the GPE before clearing
3176 the status bit for edge-triggered GPEs. Lv Zheng.
3178 Added Timer() support to the AML Debug object. The current timer value is
3179 now displayed with each invocation of (Store to) the debug object to
3180 enable simple generation of execution times for AML code (method
3181 execution for example.) ACPICA BZ 1093.
3183 Example Code and Data Size: These are the sizes for the OS-independent
3184 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3185 debug version of the code includes the debug output trace mechanism and
3186 has a much larger code and data size.
3189 Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total
3190 Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
3192 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
3193 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
3196 2) iASL Compiler/Disassembler and Tools:
3198 Fixed an issue with the recently added local printf implementation,
3199 concerning width/precision specifiers that could cause incorrect output.
3200 Lv Zheng. ACPICA BZ 1094.
3202 Disassembler: Added support to detect buffers that contain UUIDs and
3203 disassemble them to an invocation of the ToUUID operator. Also emit
3204 commented descriptions of known ACPI-related UUIDs.
3206 AcpiHelp: Added support to display known ACPI-related UUIDs. New option,
3207 -u. Adds three new files.
3209 iASL: Update table compiler and disassembler for DMAR table changes that
3210 were introduced in September 2013. With assistance by David Woodhouse.
3212 ----------------------------------------
3213 27 June 2014. Summary of changes for version 20140627:
3215 1) ACPICA kernel-resident subsystem:
3217 Formatted Output: Implemented local versions of standard formatted output
3218 utilities such as printf, etc. Over time, it has been discovered that
3219 there are in fact many portability issues with printf, and the addition
3220 of this feature will fix/prevent these issues once and for all. Some
3221 known issues are summarized below:
3223 1) Output of 64-bit values is not portable. For example, UINT64 is %ull
3224 for the Linux kernel and is %uI64 for some MSVC versions.
3225 2) Invoking printf consistently in a manner that is portable across both
3226 32-bit and 64-bit platforms is difficult at best in many situations.
3227 3) The output format for pointers varies from system to system (leading
3228 zeros especially), and leads to inconsistent output from ACPICA across
3230 4) Certain platform-specific printf formats may conflict with ACPICA use.
3231 5) If there is no local C library available, ACPICA now has local support
3234 -- To address these printf issues in a complete manner, ACPICA now
3235 directly implements a small subset of printf format specifiers, only
3236 those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
3238 Implemented support for ACPICA generation within the EFI environment.
3239 Initially, the AcpiDump utility is supported in the UEFI shell
3240 environment. Lv Zheng.
3242 Added a new external interface, AcpiLogError, to improve ACPICA
3243 portability. This allows the host to redirect error messages from the
3244 ACPICA utilities. Lv Zheng.
3246 Added and deployed new OSL file I/O interfaces to improve ACPICA
3254 There are C library implementations of these functions in the new file
3255 service_layers/oslibcfs.c -- however, the functions can be implemented by
3256 the local host in any way necessary. Lv Zheng.
3258 Implemented a mechanism to disable/enable ACPI table checksum validation
3259 at runtime. This can be useful when loading tables very early during OS
3260 initialization when it may not be possible to map the entire table in
3261 order to compute the checksum. Lv Zheng.
3263 Fixed a buffer allocation issue for the Generic Serial Bus support.
3264 Originally, a fixed buffer length was used. This change allows for
3265 variable-length buffers based upon the protocol indicated by the field
3266 access attributes. Reported by Lan Tianyu. Lv Zheng.
3268 Fixed a problem where an object detached from a namespace node was not
3269 properly terminated/cleared and could cause a circular list problem if
3270 reattached. ACPICA BZ 1063. David Box.
3272 Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
3274 Fixed a possible memory leak in an error return path within the function
3275 AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
3277 Example Code and Data Size: These are the sizes for the OS-independent
3278 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3279 debug version of the code includes the debug output trace mechanism and
3280 has a much larger code and data size.
3283 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
3284 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
3286 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
3287 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
3290 2) iASL Compiler/Disassembler and Tools:
3292 Disassembler: Add dump of ASCII equivalent text within a comment at the
3293 end of each line of the output for the Buffer() ASL operator.
3295 AcpiDump: Miscellaneous changes:
3296 Fixed repetitive table dump in -n mode.
3297 For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
3298 the ACPI 2.0 GUID fails.
3300 iASL: Fixed a problem where the compiler could fault if incorrectly given
3301 an acpidump output file as input. ACPICA BZ 1088. David Box.
3303 AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
3304 they are invoked without any arguments.
3306 Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
3307 1086. Colin Ian King.
3309 Disassembler: Cleaned up a block of code that extracts a parent Op
3310 object. Added a comment that explains that the parent is guaranteed to be
3311 valid in this case. ACPICA BZ 1069.
3314 ----------------------------------------
3315 24 April 2014. Summary of changes for version 20140424:
3317 1) ACPICA kernel-resident subsystem:
3319 Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
3320 Some of these tables are known to contain a trailing NULL entry. Lv
3323 Removed an extraneous error message for the case where there are a large
3324 number of system GPEs (> 124). This was the "32-bit FADT register is too
3325 long to convert to GAS struct" message, which is irrelevant for GPEs
3326 since the GPEx_BLK_LEN fields of the FADT are always used instead of the
3327 (limited capacity) GAS bit length. Also, several changes to ensure proper
3328 support for GPE numbers > 255, where some "GPE number" fields were 8-bits
3331 Implemented and deployed additional configuration support for the public
3332 ACPICA external interfaces. Entire classes of interfaces can now be
3333 easily modified or configured out, replaced by stubbed inline functions
3334 by default. Lv Zheng.
3336 Moved all public ACPICA runtime configuration globals to the public
3337 ACPICA external interface file for convenience. Also, removed some
3338 obsolete/unused globals. See the file acpixf.h. Lv Zheng.
3340 Documentation: Added a new section to the ACPICA reference describing the
3341 maximum number of GPEs that can be supported by the FADT-defined GPEs in
3342 block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
3345 Example Code and Data Size: These are the sizes for the OS-independent
3346 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3347 debug version of the code includes the debug output trace mechanism and
3348 has a much larger code and data size.
3351 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
3352 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
3354 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
3355 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
3358 2) iASL Compiler/Disassembler and Tools:
3360 iASL and disassembler: Add full support for the LPIT table (Low Power
3361 Idle Table). Includes support in the disassembler, data table compiler,
3362 and template generator.
3365 1) Add option to force the use of the RSDT (over the XSDT).
3366 2) Improve validation of the RSDP signature (use 8 chars instead of 4).
3368 iASL: Add check for predefined packages that are too large. For
3369 predefined names that contain subpackages, check if each subpackage is
3370 too large. (Check for too small already exists.)
3372 Debugger: Updated the GPE command (which simulates a GPE by executing the
3373 GPE code paths in ACPICA). The GPE device is now optional, and defaults
3374 to the GPE 0/1 FADT-defined blocks.
3376 Unix application OSL: Update line-editing support. Add additional error
3377 checking and take care not to reset terminal attributes on exit if they
3378 were never set. This should help guarantee that the terminal is always
3379 left in the previous state on program exit.
3382 ----------------------------------------
3383 25 March 2014. Summary of changes for version 20140325:
3385 1) ACPICA kernel-resident subsystem:
3387 Updated the auto-serialize feature for control methods. This feature
3388 automatically serializes all methods that create named objects in order
3389 to prevent runtime errors. The update adds support to ignore the
3390 currently executing AML SyncLevel when invoking such a method, in order
3391 to prevent disruption of any existing SyncLevel priorities that may exist
3392 in the AML code. Although the use of SyncLevels is relatively rare, this
3393 change fixes a regression where an AE_AML_MUTEX_ORDER exception can
3394 appear on some machines starting with the 20140214 release.
3396 Added a new external interface to allow the host to install ACPI tables
3397 very early, before the namespace is even created. AcpiInstallTable gives
3398 the host additional flexibility for ACPI table management. Tables can be
3399 installed directly by the host as if they had originally appeared in the
3400 XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
3401 (anything except the DSDT and FACS). Adds a new file, tbdata.c, along
3402 with additional internal restructuring and cleanup. See the ACPICA
3403 Reference for interface details. Lv Zheng.
3405 Added validation of the checksum for all incoming dynamically loaded
3406 tables (via external interfaces or via AML Load/LoadTable operators). Lv
3409 Updated the use of the AcpiOsWaitEventsComplete interface during Notify
3410 and GPE handler removal. Restructured calls to eliminate possible race
3411 conditions. Lv Zheng.
3413 Added a warning for the use/execution of the ASL/AML Unload (table)
3414 operator. This will help detect and identify machines that use this
3415 operator if and when it is ever used. This operator has never been seen
3416 in the field and the usage model and possible side-effects of the drastic
3417 runtime action of a full table removal are unknown.
3419 Reverted the use of #pragma push/pop which was introduced in the 20140214
3420 release. It appears that push and pop are not implemented by enough
3421 compilers to make the use of this feature feasible for ACPICA at this
3422 time. However, these operators may be deployed in a future ACPICA
3425 Added the missing EXPORT_SYMBOL macros for the install and remove SCI
3428 Source code generation:
3429 1) Disabled the use of the "strchr" macro for the gcc-specific
3430 generation. For some versions of gcc, this macro can periodically expose
3431 a compiler bug which in turn causes compile-time error(s).
3432 2) Added support for PPC64 compilation. Colin Ian King.
3434 Example Code and Data Size: These are the sizes for the OS-independent
3435 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3436 debug version of the code includes the debug output trace mechanism and
3437 has a much larger code and data size.
3440 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
3441 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
3443 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
3444 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
3447 2) iASL Compiler/Disassembler and Tools:
3449 Disassembler: Added several new features to improve the readability of
3450 the resulting ASL code. Extra information is emitted within comment
3451 fields in the ASL code:
3452 1) Known _HID/_CID values are decoded to descriptive text.
3453 2) Standard values for the Notify() operator are decoded to descriptive
3455 3) Target operands are expanded to full pathnames (in a comment) when
3458 Disassembler: Miscellaneous updates for extern() handling:
3459 1) Abort compiler if file specified by -fe option does not exist.
3460 2) Silence unnecessary warnings about argument count mismatches.
3461 3) Update warning messages concerning unresolved method externals.
3462 4) Emit "UnknownObj" keyword for externals whose type cannot be
3466 1) Added the -a option to display both the ASL syntax and the AML
3467 encoding for an input ASL operator. This effectively displays all known
3468 information about an ASL operator with one AcpiHelp invocation.
3469 2) Added substring match support (similar to a wildcard) for the -i
3470 (_HID/PNP IDs) option.
3472 iASL/Disassembler: Since this tool does not yet support execution on big-
3473 endian machines, added detection of endianness and an error message if
3474 execution is attempted on big-endian. Support for big-endian within iASL
3475 is a feature that is on the ACPICA to-be-done list.
3478 1) Remove option to extract binary files from an acpidump; this function
3479 is made obsolete by the AcpiXtract utility.
3480 2) General cleanup of open files and allocated buffers.
3483 ----------------------------------------
3484 14 February 2014. Summary of changes for version 20140214:
3486 1) ACPICA kernel-resident subsystem:
3488 Implemented a new mechanism to proactively prevent problems with ill-
3489 behaved reentrant control methods that create named ACPI objects. This
3490 behavior is illegal as per the ACPI specification, but is nonetheless
3491 frequently seen in the field. Previously, this could lead to an
3492 AE_ALREADY_EXISTS exception if the method was actually entered by more
3493 than one thread. This new mechanism detects such methods at table load
3494 time and marks them "serialized" to prevent reentrancy. A new global
3495 option, AcpiGbl_AutoSerializeMethods, has been added to disable this
3496 feature if desired. This mechanism and global option obsoletes and
3497 supersedes the previous AcpiGbl_SerializeAllMethods option.
3499 Added the "Windows 2013" string to the _OSI support. ACPICA will now
3500 respond TRUE to _OSI queries with this string. It is the stated policy of
3501 ACPICA to add new strings to the _OSI support as soon as possible after
3502 they are defined. See the full ACPICA _OSI policy which has been added to
3503 the utilities/utosi.c file.
3505 Hardened/updated the _PRT return value auto-repair code:
3506 1) Do not abort the repair on a single subpackage failure, continue to
3507 check all subpackages.
3508 2) Add check for the minimum subpackage length (4).
3509 3) Properly handle extraneous NULL package elements.
3511 Added support to avoid the possibility of infinite loops when traversing
3512 object linked lists. Never allow an infinite loop, even in the face of
3513 corrupted object lists.
3515 ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
3516 pack(pop) directives to ensure that the ACPICA headers are independent of
3517 compiler settings or other host headers.
3519 Example Code and Data Size: These are the sizes for the OS-independent
3520 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3521 debug version of the code includes the debug output trace mechanism and
3522 has a much larger code and data size.
3525 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
3526 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
3528 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
3529 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
3532 2) iASL Compiler/Disassembler and Tools:
3534 iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
3535 first reserved field was incorrectly forced to have a value of zero. This
3536 change correctly forces the field to have a value of one. ACPICA BZ 1081.
3538 Debugger: Added missing support for the "Extra" and "Data" subobjects
3539 when displaying object data.
3541 Debugger: Added support to display entire object linked lists when
3542 displaying object data.
3544 iASL: Removed the obsolete -g option to obtain ACPI tables from the
3545 Windows registry. This feature has been superseded by the acpidump
3549 ----------------------------------------
3550 14 January 2014. Summary of changes for version 20140114:
3552 1) ACPICA kernel-resident subsystem:
3554 Updated all ACPICA copyrights and signons to 2014. Added the 2014
3555 copyright to all module headers and signons, including the standard Linux
3556 header. This affects virtually every file in the ACPICA core subsystem,
3557 iASL compiler, all ACPICA utilities, and the test suites.
3559 Improved parameter validation for AcpiInstallGpeBlock. Added the
3561 1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
3562 2) There is not already a GPE block attached to the device.
3563 Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
3566 Correctly support "references" in the ACPI_OBJECT. This change fixes the
3567 support to allow references (namespace nodes) to be passed as arguments
3568 to control methods via the evaluate object interface. This is probably
3569 most useful for testing purposes, however.
3571 Improved support for 32/64 bit physical addresses in printf()-like
3572 output. This change improves the support for physical addresses in printf
3573 debug statements and other output on both 32-bit and 64-bit hosts. It
3574 consistently outputs the appropriate number of bytes for each host. The
3575 %p specifier is unsatisfactory since it does not emit uniform output on
3576 all hosts/clib implementations (on some, leading zeros are not supported,
3577 leading to difficult-to-read output).
3579 Example Code and Data Size: These are the sizes for the OS-independent
3580 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3581 debug version of the code includes the debug output trace mechanism and
3582 has a much larger code and data size.
3585 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
3586 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
3588 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
3589 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
3592 2) iASL Compiler/Disassembler and Tools:
3594 iASL: Fix a possible fault when using the Connection() operator. Fixes a
3595 problem if the parent Field definition for the Connection operator refers
3596 to an operation region that does not exist. ACPICA BZ 1064.
3598 AcpiExec: Load of local test tables is now optional. The utility has the
3599 capability to load some various tables to test features of ACPICA.
3600 However, there are enough of them that the output of the utility became
3601 confusing. With this change, only the required local tables are displayed
3602 (RSDP, XSDT, etc.) along with the actual tables loaded via the command
3603 line specification. This makes the default output simler and easier to
3604 understand. The -el command line option restores the original behavior
3605 for testing purposes.
3607 AcpiExec: Added support for overlapping operation regions. This change
3608 expands the simulation of operation regions by supporting regions that
3609 overlap within the given address space. Supports SystemMemory and
3610 SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
3612 AcpiExec: Added region handler support for PCI_Config and EC spaces. This
3613 allows AcpiExec to simulate these address spaces, similar to the current
3614 support for SystemMemory and SystemIO.
3616 Debugger: Added new command to read/write/compare all namespace objects.
3617 The command "test objects" will exercise the entire namespace by writing
3618 new values to each data object, and ensuring that the write was
3619 successful. The original value is then restored and verified.
3621 Debugger: Added the "test predefined" command. This change makes this
3622 test public and puts it under the new "test" command. The test executes
3623 each and every predefined name within the current namespace.
3626 ----------------------------------------
3627 18 December 2013. Summary of changes for version 20131218:
3629 Global note: The ACPI 5.0A specification was released this month. There
3630 are no changes needed for ACPICA since this release of ACPI is an
3631 errata/clarification release. The specification is available at
3635 1) ACPICA kernel-resident subsystem:
3637 Added validation of the XSDT root table if it is present. Some older
3638 platforms contain an XSDT that is ill-formed or otherwise invalid (such
3639 as containing some or all entries that are NULL pointers). This change
3640 adds a new function to validate the XSDT before actually using it. If the
3641 XSDT is found to be invalid, ACPICA will now automatically fall back to
3642 using the RSDT instead. Original implementation by Zhao Yakui. Ported to
3643 ACPICA and enhanced by Lv Zheng and Bob Moore.
3645 Added a runtime option to ignore the XSDT and force the use of the RSDT.
3646 This change adds a runtime option that will force ACPICA to use the RSDT
3647 instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
3648 requires that an XSDT be used instead of the RSDT, the XSDT has been
3649 found to be corrupt or ill-formed on some machines. Lv Zheng.
3651 Added a runtime option to favor 32-bit FADT register addresses over the
3652 64-bit addresses. This change adds an option to favor 32-bit FADT
3653 addresses when there is a conflict between the 32-bit and 64-bit versions
3654 of the same register. The default behavior is to use the 64-bit version
3655 in accordance with the ACPI specification. This can now be overridden via
3656 the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
3658 During the change above, the internal "Convert FADT" and "Verify FADT"
3659 functions have been merged to simplify the code, making it easier to
3660 understand and maintain. ACPICA BZ 933.
3662 Improve exception reporting and handling for GPE block installation.
3663 Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
3664 status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
3666 Added helper macros to extract bus/segment numbers from the HEST table.
3667 This change adds two macros to extract the encoded bus and segment
3668 numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
3669 Betty Dall <betty.dall@hp.com>
3671 Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
3672 by ACPICA. It is not a public macro, so it should have no effect on
3673 existing OSV code. Lv Zheng.
3675 Example Code and Data Size: These are the sizes for the OS-independent
3676 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3677 debug version of the code includes the debug output trace mechanism and
3678 has a much larger code and data size.
3681 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
3682 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
3684 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
3685 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
3688 2) iASL Compiler/Disassembler and Tools:
3690 Disassembler: Improved pathname support for emitted External()
3691 statements. This change adds full pathname support for external names
3692 that have been resolved internally by the inclusion of additional ACPI
3693 tables (via the iASL -e option). Without this change, the disassembler
3694 can emit multiple externals for the same object, or it become confused
3695 when the Scope() operator is used on an external object. Overall, greatly
3696 improves the ability to actually recompile the emitted ASL code when
3697 objects a referenced across multiple ACPI tables. Reported by Michael
3698 Tsirkin (mst@redhat.com).
3700 Tests/ASLTS: Updated functional control suite to execute with no errors.
3701 David Box. Fixed several errors related to the testing of the interpreter
3702 slack mode. Lv Zheng.
3704 iASL: Added support to detect names that are declared within a control
3705 method, but are unused (these are temporary names that are only valid
3706 during the time the method is executing). A remark is issued for these
3707 cases. ACPICA BZ 1022.
3709 iASL: Added full support for the DBG2 table. Adds full disassembler,
3710 table compiler, and template generator support for the DBG2 table (Debug
3713 iASL: Added full support for the PCCT table, update the table definition.
3714 Updates the PCCT table definition in the actbl3.h header and adds table
3715 compiler and template generator support.
3717 iASL: Added an option to emit only error messages (no warnings/remarks).
3718 The -ve option will enable only error messages, warnings and remarks are
3719 suppressed. This can simplify debugging when only the errors are
3720 important, such as when an ACPI table is disassembled and there are many
3721 warnings and remarks -- but only the actual errors are of real interest.
3723 Example ACPICA code (source/tools/examples): Updated the example code so
3724 that it builds to an actual working program, not just example code. Added
3725 ACPI tables and execution of an example control method in the DSDT. Added
3726 makefile support for Unix generation.
3729 ----------------------------------------
3730 15 November 2013. Summary of changes for version 20131115:
3732 This release is available at https://acpica.org/downloads
3735 1) ACPICA kernel-resident subsystem:
3737 Resource Manager: Fixed loop termination for the "get AML length"
3738 function. The loop previously had an error termination on a NULL resource
3739 pointer, which can never happen since the loop simply increments a valid
3740 resource pointer. This fix changes the loop to terminate with an error on
3741 an invalid end-of-buffer condition. The problem can be seen as an
3742 infinite loop by callers to AcpiSetCurrentResources with an invalid or
3743 corrupted resource descriptor, or a resource descriptor that is missing
3744 an END_TAG descriptor. Reported by Dan Carpenter
3745 <dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
3747 Table unload and ACPICA termination: Delete all attached data objects
3748 during namespace node deletion. This fix updates namespace node deletion
3749 to delete the entire list of attached objects (attached via
3750 AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
3751 1024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
3753 ACPICA termination: Added support to delete all objects attached to the
3754 root namespace node. This fix deletes any and all objects that have been
3755 attached to the root node via AcpiAttachData. Previously, none of these
3756 objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
3758 Debug output: Do not emit the function nesting level for the in-kernel
3759 build. The nesting level is really only useful during a single-thread
3760 execution. Therefore, only enable this output for the AcpiExec utility.
3761 Also, only emit the thread ID when executing under AcpiExec (Context
3762 switches are still always detected and a message is emitted). ACPICA BZ
3765 Example Code and Data Size: These are the sizes for the OS-independent
3766 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3767 debug version of the code includes the debug output trace mechanism and
3768 has a much larger code and data size.
3771 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
3772 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
3774 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
3775 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
3778 2) iASL Compiler/Disassembler and Tools:
3780 AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
3781 correct portable POSIX header for terminal control functions.
3783 Disassembler: Fixed control method invocation issues related to the use
3784 of the CondRefOf() operator. The problem is seen in the disassembly where
3785 control method invocations may not be disassembled properly if the
3786 control method name has been used previously as an argument to CondRefOf.
3787 The solution is to not attempt to emit an external declaration for the
3788 CondRefOf target (it is not necessary in the first place). This prevents
3789 disassembler object type confusion. ACPICA BZ 988.
3791 Unix Makefiles: Added an option to disable compiler optimizations and the
3792 _FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
3793 with optimizations (reportedly, gcc 4.4 for example). This change adds a
3794 command line option for make (NOOPT) that disables all compiler
3795 optimizations and the _FORTIFY_SOURCE compiler flag. The default
3796 optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
3797 1034. Lv Zheng, Bob Moore.
3799 Tests/ASLTS: Added options to specify individual test cases and modes.
3800 This allows testers running aslts.sh to optionally specify individual
3801 test modes and test cases. Also added an option to disable the forced
3802 generation of the ACPICA tools from source if desired. Lv Zheng.
3804 ----------------------------------------
3805 27 September 2013. Summary of changes for version 20130927:
3807 This release is available at https://acpica.org/downloads
3810 1) ACPICA kernel-resident subsystem:
3812 Fixed a problem with store operations to reference objects. This change
3813 fixes a problem where a Store operation to an ArgX object that contained
3815 reference to a field object did not complete the automatic dereference
3817 then write to the actual field object. Instead, the object type of the
3818 field object was inadvertently changed to match the type of the source
3819 operand. The new behavior will actually write to the field object (buffer
3820 field or field unit), thus matching the correct ACPI-defined behavior.
3822 Implemented support to allow the host to redefine individual OSL
3823 prototypes. This change enables the host to redefine OSL prototypes found
3824 in the acpiosxf.h file. This allows the host to implement OSL interfaces
3825 with a macro or inlined function. Further, it allows the host to add any
3826 additional required modifiers such as __iomem, __init, __exit, etc., as
3827 necessary on a per-interface basis. Enables maximum flexibility for the
3828 OSL interfaces. Lv Zheng.
3830 Hardcoded the access width for the FADT-defined reset register. The ACPI
3831 specification requires the reset register width to be 8 bits. ACPICA now
3832 hardcodes the width to 8 and ignores the FADT width value. This provides
3833 compatibility with other ACPI implementations that have allowed BIOS code
3834 with bad register width values to go unnoticed. Matthew Garett, Bob
3838 Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
3840 in the OSL header (acpiosxf). The change modifies the position of this
3841 macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
3842 build issues if the OSL defines the implementation of the interface to be
3843 an inline stub function. Lv Zheng.
3845 Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
3846 initialization interfaces. This change adds a new macro for the main init
3847 and terminate external interfaces in order to support hosts that require
3848 additional or different processing for these functions. Changed from
3849 ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
3852 Cleaned up the memory allocation macros for configurability. In the
3854 case, the ACPI_ALLOCATE and related macros now resolve directly to their
3855 respective AcpiOs* OSL interfaces. Two options:
3856 1) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
3857 default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
3858 2) For AcpiExec (and for debugging), the macros can optionally be
3860 to the local ACPICA interfaces that track each allocation (local tracking
3861 is used to immediately detect memory leaks).
3864 Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
3865 to predefine this macro to either TRUE or FALSE during the system build.
3867 Replaced __FUNCTION_ with __func__ in the gcc-specific header.
3869 Example Code and Data Size: These are the sizes for the OS-independent
3870 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3871 debug version of the code includes the debug output trace mechanism and
3872 has a much larger code and data size.
3875 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
3876 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
3878 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
3879 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
3882 2) iASL Compiler/Disassembler and Tools:
3884 iASL: Implemented wildcard support for the -e option. This simplifies use
3885 when there are many SSDTs that must be included to resolve external
3887 declarations. ACPICA BZ 1041. Example:
3888 iasl -e ssdt*.dat -d dsdt.dat
3890 AcpiExec: Add history/line-editing for Unix/Linux systems. This change
3891 adds a portable module that implements full history and limited line
3892 editing for Unix and Linux systems. It does not use readline() due to
3893 portability issues. Instead it uses the POSIX termio interface to put the
3894 terminal in raw input mode so that the various special keys can be
3896 (such as up/down-arrow for history support and left/right-arrow for line
3897 editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
3899 AcpiXtract: Add support to handle (ignore) "empty" lines containing only
3900 one or more spaces. This provides compatible with early or different
3901 versions of the AcpiDump utility. ACPICA BZ 1044.
3903 AcpiDump: Do not ignore tables that contain only an ACPI table header.
3904 Apparently, some BIOSs create SSDTs that contain an ACPI table header but
3905 no other data. This change adds support to dump these tables. Any tables
3906 shorter than the length of an ACPI table header remain in error (an error
3907 message is emitted). Reported by Yi Li.
3909 Debugger: Echo actual command along with the "unknown command" message.
3911 ----------------------------------------
3912 23 August 2013. Summary of changes for version 20130823:
3914 1) ACPICA kernel-resident subsystem:
3916 Implemented support for host-installed System Control Interrupt (SCI)
3917 handlers. Certain ACPI functionality requires the host to handle raw
3918 SCIs. For example, the "SCI Doorbell" that is defined for memory power
3919 state support requires the host device driver to handle SCIs to examine
3920 if the doorbell has been activated. Multiple SCI handlers can be
3921 installed to allow for future expansion. New external interfaces are
3922 AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
3923 details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
3925 Operation region support: Never locally free the handler "context"
3926 pointer. This change removes some dangerous code that attempts to free
3927 the handler context pointer in some (rare) circumstances. The owner of
3928 the handler owns this pointer and the ACPICA code should never touch it.
3929 Although not seen to be an issue in any kernel, it did show up as a
3930 problem (fault) under AcpiExec. Also, set the internal storage field for
3931 the context pointer to zero when the region is deactivated, simply for
3932 sanity. David Box. ACPICA BZ 1039.
3934 AcpiRead: On error, do not modify the return value target location. If an
3935 error happens in the middle of a split 32/32 64-bit I/O operation, do not
3936 modify the target of the return value pointer. Makes the code consistent
3937 with the rest of ACPICA. Bjorn Helgaas.
3939 Example Code and Data Size: These are the sizes for the OS-independent
3940 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3941 debug version of the code includes the debug output trace mechanism and
3942 has a much larger code and data size.
3945 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
3946 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
3948 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
3949 Debug Version: 185.4K Code, 77.1K Data, 262.5K Total
3952 2) iASL Compiler/Disassembler and Tools:
3954 AcpiDump: Implemented several new features and fixed some problems:
3955 1) Added support to dump the RSDP, RSDT, and XSDT tables.
3956 2) Added support for multiple table instances (SSDT, UEFI).
3957 3) Added option to dump "customized" (overridden) tables (-c).
3958 4) Fixed a problem where some table filenames were improperly
3960 5) Improved some error messages, removed some unnecessary messages.
3962 iASL: Implemented additional support for disassembly of ACPI tables that
3963 contain invocations of external control methods. The -fe<file> option
3964 allows the import of a file that specifies the external methods along
3965 with the required number of arguments for each -- allowing for the
3966 correct disassembly of the table. This is a workaround for a limitation
3967 of AML code where the disassembler often cannot determine the number of
3968 arguments required for an external control method and generates incorrect
3969 ASL code. See the iASL reference for details. ACPICA BZ 1030.
3971 Debugger: Implemented a new command (paths) that displays the full
3972 pathnames (namepaths) and object types of all objects in the namespace.
3973 This is an alternative to the namespace command.
3975 Debugger: Implemented a new command (sci) that invokes the SCI dispatch
3976 mechanism and any installed handlers.
3978 iASL: Fixed a possible segfault for "too many parent prefixes" condition.
3979 This can occur if there are too many parent prefixes in a namepath (for
3980 example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
3982 Application OSLs: Set the return value for the PCI read functions. These
3983 functions simply return AE_OK, but should set the return value to zero
3984 also. This change implements this. ACPICA BZ 1038.
3986 Debugger: Prevent possible command line buffer overflow. Increase the
3987 size of a couple of the debugger line buffers, and ensure that overflow
3988 cannot happen. ACPICA BZ 1037.
3990 iASL: Changed to abort immediately on serious errors during the parsing
3991 phase. Due to the nature of ASL, there is no point in attempting to
3992 compile these types of errors, and they typically end up causing a
3993 cascade of hundreds of errors which obscure the original problem.
3995 ----------------------------------------
3996 25 July 2013. Summary of changes for version 20130725:
3998 1) ACPICA kernel-resident subsystem:
4000 Fixed a problem with the DerefOf operator where references to FieldUnits
4001 and BufferFields incorrectly returned the parent object, not the actual
4002 value of the object. After this change, a dereference of a FieldUnit
4003 reference results in a read operation on the field to get the value, and
4004 likewise, the appropriate BufferField value is extracted from the target
4007 Fixed a problem where the _WAK method could cause a fault under these
4008 circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
4009 method returned no value. The problem is rarely seen because most kernels
4010 run ACPICA in slack mode.
4012 For the DerefOf operator, a fatal error now results if an attempt is made
4013 to dereference a reference (created by the Index operator) to a NULL
4014 package element. Provides compatibility with other ACPI implementations,
4015 and this behavior will be added to a future version of the ACPI
4018 The ACPI Power Management Timer (defined in the FADT) is now optional.
4019 This provides compatibility with other ACPI implementations and will
4020 appear in the next version of the ACPI specification. If there is no PM
4021 Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
4022 zero in the FADT indicates no PM timer.
4024 Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
4025 allows the host to globally enable/disable all vendor strings, all
4026 feature strings, or both. Intended to be primarily used for debugging
4027 purposes only. Lv Zheng.
4029 Expose the collected _OSI data to the host via a global variable. This
4030 data tracks the highest level vendor ID that has been invoked by the BIOS
4031 so that the host (and potentially ACPICA itself) can change behaviors
4032 based upon the age of the BIOS.
4034 Example Code and Data Size: These are the sizes for the OS-independent
4035 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4036 debug version of the code includes the debug output trace mechanism and
4037 has a much larger code and data size.
4040 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
4041 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
4043 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
4044 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
4047 2) iASL Compiler/Disassembler and Tools:
4049 iASL: Created the following enhancements for the -so option (create
4051 1)Add offsets for the last nameseg in each namepath for every supported
4053 2)Add support for Processor, Device, Thermal Zone, and Scope objects
4054 3)Add the actual AML opcode for the parent object of every supported
4056 4)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
4058 Disassembler: Emit all unresolved external symbols in a single block.
4059 These are external references to control methods that could not be
4060 resolved, and thus, the disassembler had to make a guess at the number of
4063 iASL: The argument to the -T option (create table template) is now
4064 optional. If not specified, the default table is a DSDT, typically the
4067 ----------------------------------------
4068 26 June 2013. Summary of changes for version 20130626:
4070 1) ACPICA kernel-resident subsystem:
4072 Fixed an issue with runtime repair of the _CST object. Null or invalid
4073 elements were not always removed properly. Lv Zheng.
4075 Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
4076 FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
4077 the maximum number of GPEs is 1016. Use of multiple GPE block devices
4078 makes the system-wide number of GPEs essentially unlimited.
4080 Example Code and Data Size: These are the sizes for the OS-independent
4081 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4082 debug version of the code includes the debug output trace mechanism and
4083 has a much larger code and data size.
4086 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
4087 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
4089 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
4090 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
4093 2) iASL Compiler/Disassembler and Tools:
4095 Portable AcpiDump: Implemented full support for the Linux and FreeBSD
4096 hosts. Now supports Linux, FreeBSD, and Windows.
4098 Disassembler: Added some missing types for the HEST and EINJ tables: "Set
4099 Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
4101 iASL/Preprocessor: Implemented full support for nested
4102 #if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
4104 Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
4105 max. The original purpose of this constraint was to limit the amount of
4106 debug output. However, the string function in question (UtPrintString) is
4107 now used for the disassembler also, where 256 bytes is insufficient.
4108 Reported by RehabMan@GitHub.
4110 iASL/DataTables: Fixed some problems and issues with compilation of DMAR
4111 tables. ACPICA BZ 999. Lv Zheng.
4113 iASL: Fixed a couple of error exit issues that could result in a "Could
4114 not delete <file>" message during ASL compilation.
4116 AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
4117 the actual signatures for these tables are "FACP" and "APIC",
4120 AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
4121 tables are allowed to have multiple instances.
4123 ----------------------------------------
4124 17 May 2013. Summary of changes for version 20130517:
4126 1) ACPICA kernel-resident subsystem:
4128 Fixed a regression introduced in version 20130328 for _INI methods. This
4129 change fixes a problem introduced in 20130328 where _INI methods are no
4130 longer executed properly because of a memory block that was not
4131 initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
4132 <tomasz.nowicki@linaro.org>.
4134 Fixed a possible problem with the new extended sleep registers in the
4136 5.0 FADT. Do not use these registers (even if populated) unless the HW-
4137 reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
4140 Implemented return value repair code for _CST predefined objects: Sort
4142 list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
4144 Implemented a debug-only option to disable loading of SSDTs from the
4145 RSDT/XSDT during ACPICA initialization. This can be useful for debugging
4146 ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
4147 acglobal.h - ACPICA BZ 1005. Lv Zheng.
4149 Fixed some issues in the ACPICA initialization and termination code:
4150 Tomasz Nowicki <tomasz.nowicki@linaro.org>
4151 1) Clear events initialized flag upon event component termination. ACPICA
4153 2) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
4154 3) Delete global lock pending lock during termination. ACPICA BZ 1012.
4155 4) Clear debug buffer global on termination to prevent possible multiple
4156 delete. ACPICA BZ 1010.
4158 Standardized all switch() blocks across the entire source base. After
4160 years, different formatting for switch() had crept in. This change makes
4161 the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
4163 Split some files to enhance ACPICA modularity and configurability:
4164 1) Split buffer dump routines into utilities/utbuffer.c
4165 2) Split internal error message routines into utilities/uterror.c
4166 3) Split table print utilities into tables/tbprint.c
4167 4) Split iASL command-line option processing into asloptions.c
4169 Makefile enhancements:
4170 1) Support for all new files above.
4171 2) Abort make on errors from any subcomponent. Chao Guan.
4172 3) Add build support for Apple Mac OS X. Liang Qi.
4174 Example Code and Data Size: These are the sizes for the OS-independent
4175 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4176 debug version of the code includes the debug output trace mechanism and
4177 has a much larger code and data size.
4180 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
4181 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
4183 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
4184 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
4187 2) iASL Compiler/Disassembler and Tools:
4189 New utility: Implemented an easily portable version of the acpidump
4190 utility to extract ACPI tables from the system (or a file) in an ASCII
4192 dump format. The top-level code implements the various command line
4193 options, file I/O, and table dump routines. To port to a new host, only
4194 three functions need to be implemented to get tables -- since this
4195 functionality is OS-dependent. See the tools/acpidump/apmain.c module and
4196 the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
4197 1) The Windows version obtains the ACPI tables from the Registry.
4198 2) The Linux version is under development.
4199 3) Other hosts - If an OS-dependent module is submitted, it will be
4200 distributed with ACPICA.
4202 iASL: Fixed a regression for -D preprocessor option (define symbol). A
4203 restructuring/change to the initialization sequence caused this option to
4204 no longer work properly.
4206 iASL: Implemented a mechanism to disable specific warnings and remarks.
4207 Adds a new command line option, "-vw <messageid> as well as "#pragma
4208 disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
4210 iASL: Fix for too-strict package object validation. The package object
4211 validation for return values from the predefined names is a bit too
4212 strict, it does not allow names references within the package (which will
4213 be resolved at runtime.) These types of references cannot be validated at
4214 compile time. This change ignores named references within package objects
4215 for names that return or define static packages.
4217 Debugger: Fixed the 80-character command line limitation for the History
4218 command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
4220 iASL: Added control method and package support for the -so option
4221 (generates AML offset table for BIOS support.)
4223 iASL: issue a remark if a non-serialized method creates named objects. If
4224 a thread blocks within the method for any reason, and another thread
4225 enters the method, the method will fail because an attempt will be made
4227 create the same (named) object twice. In this case, issue a remark that
4228 the method should be marked serialized. NOTE: may become a warning later.
4231 ----------------------------------------
4232 18 April 2013. Summary of changes for version 20130418:
4234 1) ACPICA kernel-resident subsystem:
4236 Fixed a possible buffer overrun during some rare but specific field unit
4237 read operations. This overrun can only happen if the DSDT version is 1 --
4238 meaning that all AML integers are 32 bits -- and the field length is
4239 between 33 and 55 bits long. During the read, an internal buffer object
4241 created for the field unit because the field is larger than an integer
4243 bits). However, in this case, the buffer will be incorrectly written
4244 beyond the end because the buffer length is less than the internal
4246 of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
4247 long, but a full 8 bytes will be written.
4249 Updated the Embedded Controller "orphan" _REG method support. This refers
4250 to _REG methods under the EC device that have no corresponding operation
4251 region. This is allowed by the ACPI specification. This update removes a
4252 dependency on the existence an ECDT table. It will execute an orphan _REG
4253 method as long as the operation region handler for the EC is installed at
4254 the EC device node and not the namespace root. Rui Zhang (original
4255 update), Bob Moore (update/integrate).
4257 Implemented run-time argument typechecking for all predefined ACPI names
4258 (_STA, _BIF, etc.) This change performs object typechecking on all
4259 incoming arguments for all predefined names executed via
4260 AcpiEvaluateObject. This ensures that ACPI-related device drivers are
4261 passing correct object types as well as the correct number of arguments
4262 (therefore identifying any issues immediately). Also, the ASL/namespace
4263 definition of the predefined name is checked against the ACPI
4264 specification for the proper argument count. Adds one new file,
4267 Changed an exception code for the ASL UnLoad() operator. Changed the
4268 exception code for the case where the input DdbHandle is invalid, from
4269 AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
4271 Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
4272 global makefile. The use of this flag causes compiler errors on earlier
4273 versions of GCC, so it has been removed for compatibility.
4275 Miscellaneous cleanup:
4276 1) Removed some unused/obsolete macros
4277 2) Fixed a possible memory leak in the _OSI support
4278 3) Removed an unused variable in the predefined name support
4279 4) Windows OSL: remove obsolete reference to a memory list field
4281 Example Code and Data Size: These are the sizes for the OS-independent
4282 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4283 debug version of the code includes the debug output trace mechanism and
4284 has a much larger code and data size.
4287 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
4288 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
4290 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
4291 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
4294 2) iASL Compiler/Disassembler and Tools:
4296 AcpiExec: Added installation of a handler for the SystemCMOS address
4297 space. This prevents control method abort if a method accesses this
4300 AcpiExec: Added support for multiple EC devices, and now install EC
4301 operation region handler(s) at the actual EC device instead of the
4302 namespace root. This reflects the typical behavior of host operating
4305 AcpiExec: Updated to ensure that all operation region handlers are
4306 installed before the _REG methods are executed. This prevents a _REG
4307 method from aborting if it accesses an address space has no handler.
4308 AcpiExec installs a handler for every possible address space.
4310 Debugger: Enhanced the "handlers" command to display non-root handlers.
4311 This change enhances the handlers command to display handlers associated
4312 with individual devices throughout the namespace, in addition to the
4313 currently supported display of handlers associated with the root
4317 ASL Test Suite: Several test suite errors have been identified and
4318 resolved, reducing the total error count during execution. Chao Guan.
4320 ----------------------------------------
4321 28 March 2013. Summary of changes for version 20130328:
4323 1) ACPICA kernel-resident subsystem:
4325 Fixed several possible race conditions with the internal object reference
4326 counting mechanism. Some of the external ACPICA interfaces update object
4327 reference counts without holding the interpreter or namespace lock. This
4328 change adds a spinlock to protect reference count updates on the internal
4329 ACPICA objects. Reported by and with assistance from Andriy Gapon
4332 FADT support: Removed an extraneous warning for very large GPE register
4333 sets. This change removes a size mismatch warning if the legacy length
4334 field for a GPE register set is larger than the 64-bit GAS structure can
4335 accommodate. GPE register sets can be larger than the 255-bit width
4336 limitation of the GAS structure. Linn Crosetto (linn@hp.com).
4338 _OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
4339 return from this interface. Handles a possible timeout case if
4340 ACPI_WAIT_FOREVER is modified by the host to be a value less than
4341 "forever". Jung-uk Kim.
4343 Predefined name support: Add allowed/required argument type information
4345 the master predefined info table. This change adds the infrastructure to
4346 enable typechecking on incoming arguments for all predefined
4347 methods/objects. It does not actually contain the code that will fully
4348 utilize this information, this is still under development. Also condenses
4349 some duplicate code for the predefined names into a new module,
4350 utilities/utpredef.c
4352 Example Code and Data Size: These are the sizes for the OS-independent
4353 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4354 debug version of the code includes the debug output trace mechanism and
4355 has a much larger code and data size.
4358 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
4359 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
4361 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
4362 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
4365 2) iASL Compiler/Disassembler and Tools:
4367 iASL: Implemented a new option to simplify the development of ACPI-
4369 BIOS code. Adds support for a new "offset table" output file. The -so
4370 option will create a C table containing the AML table offsets of various
4371 named objects in the namespace so that BIOS code can modify them easily
4373 boot time. This can simplify BIOS runtime code by eliminating expensive
4374 searches for "magic values", enhancing boot times and adding greater
4375 reliability. With assistance from Lee Hamel.
4377 iASL: Allow additional predefined names to return zero-length packages.
4378 Now, all predefined names that are defined by the ACPI specification to
4379 return a "variable-length package of packages" are allowed to return a
4380 zero length top-level package. This allows the BIOS to tell the host that
4381 the requested feature is not supported, and supports existing BIOS/ASL
4384 iASL: Changed the "result not used" warning to an error. This is the case
4385 where an ASL operator is effectively a NOOP because the result of the
4386 operation is not stored anywhere. For example:
4388 There is no target (missing 3rd argument), nor is the function return
4389 value used. This is potentially a very serious problem -- since the code
4390 was probably intended to do something, but for whatever reason, the value
4391 was not stored. Therefore, this issue has been upgraded from a warning to
4394 AcpiHelp: Added allowable/required argument types to the predefined names
4395 info display. This feature utilizes the recent update to the predefined
4396 names table (above).
4398 ----------------------------------------
4399 14 February 2013. Summary of changes for version 20130214:
4401 1) ACPICA Kernel-resident Subsystem:
4403 Fixed a possible regression on some hosts: Reinstated the safe return
4404 macros (return_ACPI_STATUS, etc.) that ensure that the argument is
4405 evaluated only once. Although these macros are not needed for the ACPICA
4406 code itself, they are often used by ACPI-related host device drivers
4408 the safe feature may be necessary.
4410 Fixed several issues related to the ACPI 5.0 reduced hardware support
4411 (SOC): Now ensure that if the platform declares itself as hardware-
4413 via the FADT, the following functions become NOOPs (and always return
4414 AE_OK) because ACPI is always enabled by definition on these machines:
4420 Dynamic Object Repair: Implemented additional runtime repairs for
4421 predefined name return values. Both of these repairs can simplify code in
4422 the related device drivers that invoke these methods:
4423 1) For the _STR and _MLS names, automatically repair/convert an ASCII
4424 string to a Unicode buffer.
4425 2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
4427 lone end tag descriptor in the following cases: A Return(0) was executed,
4428 a null buffer was returned, or no object at all was returned (non-slack
4429 mode only). Adds a new file, nsconvert.c
4430 ACPICA BZ 998. Bob Moore, Lv Zheng.
4432 Resource Manager: Added additional code to prevent possible infinite
4434 while traversing corrupted or ill-formed resource template buffers. Check
4435 for zero-length resource descriptors in all code that loops through
4436 resource templates (the length field is used to index through the
4437 template). This change also hardens the external AcpiWalkResources and
4438 AcpiWalkResourceBuffer interfaces.
4440 Local Cache Manager: Enhanced the main data structure to eliminate an
4441 unnecessary mechanism to access the next object in the list. Actually
4442 provides a small performance enhancement for hosts that use the local
4443 ACPICA cache manager. Jung-uk Kim.
4445 Example Code and Data Size: These are the sizes for the OS-independent
4446 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4447 debug version of the code includes the debug output trace mechanism and
4448 has a much larger code and data size.
4451 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
4452 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
4454 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
4455 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
4458 2) iASL Compiler/Disassembler and Tools:
4460 iASL/Disassembler: Fixed several issues with the definition of the ACPI
4461 5.0 RASF table (RAS Feature Table). This change incorporates late changes
4462 that were made to the ACPI 5.0 specification.
4464 iASL/Disassembler: Added full support for the following new ACPI tables:
4465 1) The MTMR table (MID Timer Table)
4466 2) The VRTC table (Virtual Real Time Clock Table).
4467 Includes header file, disassembler, table compiler, and template support
4470 iASL: Implemented compile-time validation of package objects returned by
4471 predefined names. This new feature validates static package objects
4472 returned by the various predefined names defined to return packages. Both
4473 object types and package lengths are validated, for both parent packages
4474 and sub-packages, if any. The code is similar in structure and behavior
4476 the runtime repair mechanism within the AML interpreter and uses the
4477 existing predefined name information table. Adds a new file, aslprepkg.c.
4480 iASL: Implemented auto-detection of binary ACPI tables for disassembly.
4481 This feature detects a binary file with a valid ACPI table header and
4482 invokes the disassembler automatically. Eliminates the need to
4483 specifically invoke the disassembler with the -d option. ACPICA BZ 862.
4485 iASL/Disassembler: Added several warnings for the case where there are
4486 unresolved control methods during the disassembly. This can potentially
4487 cause errors when the output file is compiled, because the disassembler
4488 assumes zero method arguments in these cases (it cannot determine the
4489 actual number of arguments without resolution/definition of the method).
4491 Debugger: Added support to display all resources with a single command.
4492 Invocation of the resources command with no arguments will now display
4494 resources within the current namespace.
4496 AcpiHelp: Added descriptive text for each ACPICA exception code displayed
4499 ----------------------------------------
4500 17 January 2013. Summary of changes for version 20130117:
4502 1) ACPICA Kernel-resident Subsystem:
4504 Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
4505 return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
4506 objects to return a package containing one integer, most BIOS code
4508 two integers and the previous code reflects that. However, we also need
4510 support BIOS code that actually implements to the ACPI spec, and this
4511 change reflects this.
4513 Fixed two issues with the ACPI_DEBUG_PRINT macros:
4514 1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
4515 C compilers that require this support.
4516 2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
4517 ACPI_DEBUG is already used by many of the various hosts.
4519 Updated all ACPICA copyrights and signons to 2013. Added the 2013
4520 copyright to all module headers and signons, including the standard Linux
4521 header. This affects virtually every file in the ACPICA core subsystem,
4522 iASL compiler, all ACPICA utilities, and the test suites.
4524 Example Code and Data Size: These are the sizes for the OS-independent
4525 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4526 debug version of the code includes the debug output trace mechanism and
4527 has a much larger code and data size.
4530 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
4531 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
4533 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
4534 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
4537 2) iASL Compiler/Disassembler and Tools:
4539 Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
4540 prevent a possible fault on some hosts. Some C libraries modify the arg
4541 pointer parameter to vfprintf making it difficult to call it twice in the
4542 AcpiOsVprintf function. Use a local buffer to workaround this issue. This
4543 does not affect the Windows OSL since the Win C library does not modify
4544 the arg pointer. Chao Guan, Bob Moore.
4546 iASL: Fixed a possible infinite loop when the maximum error count is
4547 reached. If an output file other than the .AML file is specified (such as
4548 a listing file), and the maximum number of errors is reached, do not
4549 attempt to flush data to the output file(s) as the compiler is aborting.
4550 This can cause an infinite loop as the max error count code essentially
4551 keeps calling itself.
4553 iASL/Disassembler: Added an option (-in) to ignore NOOP
4555 Implemented for both the compiler and the disassembler. Often, the NOOP
4556 opcode is used as padding for packages that are changed dynamically by
4558 BIOS. When disassembled and recompiled, these NOOPs will cause syntax
4559 errors. This option causes the disassembler to ignore all NOOP opcodes
4560 (0xA3), and it also causes the compiler to ignore all ASL source code
4564 Debugger: Enhanced the Sleep command to execute all sleep states. This
4565 change allows Sleep to be invoked with no arguments and causes the
4566 debugger to execute all of the sleep states, 0-5, automatically.
4568 ----------------------------------------
4569 20 December 2012. Summary of changes for version 20121220:
4571 1) ACPICA Kernel-resident Subsystem:
4573 Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
4574 alternate entry point for AcpiWalkResources and improves the usability of
4575 the resource manager by accepting as input a buffer containing the output
4576 of either a _CRS, _PRS, or _AEI method. The key functionality is that the
4577 input buffer is not deleted by this interface so that it can be used by
4578 the host later. See the ACPICA reference for details.
4580 Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
4581 (DSDT version < 2). The constant will be truncated and this warning
4582 reflects that behavior.
4584 Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
4585 ExtendedInterrupt, and GpioInt descriptors. This change adds support to
4586 both get and set the new wake bit in these descriptors, separately from
4587 the existing share bit. Reported by Aaron Lu.
4589 Interpreter: Fix Store() when an implicit conversion is not possible. For
4590 example, in the cases such as a store of a string to an existing package
4591 object, implement the store as a CopyObject(). This is a small departure
4592 from the ACPI specification which states that the control method should
4594 aborted in this case. However, the ASLTS suite depends on this behavior.
4596 Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
4597 macros: check if debug output is currently enabled as soon as possible to
4598 minimize performance impact if debug is in fact not enabled.
4600 Source code restructuring: Cleanup to improve modularity. The following
4601 new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
4602 psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
4603 Associated makefiles and project files have been updated.
4605 Changed an exception code for LoadTable operator. For the case where one
4606 of the input strings is too long, change the returned exception code from
4607 AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
4609 Fixed a possible memory leak in dispatcher error path. On error, delete
4610 the mutex object created during method mutex creation. Reported by
4611 tim.gardner@canonical.com.
4613 Example Code and Data Size: These are the sizes for the OS-independent
4614 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4615 debug version of the code includes the debug output trace mechanism and
4616 has a much larger code and data size.
4619 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
4620 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4622 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
4623 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
4626 2) iASL Compiler/Disassembler and Tools:
4628 iASL: Disallow a method call as argument to the ObjectType ASL operator.
4629 This change tracks an errata to the ACPI 5.0 document. The AML grammar
4630 will not allow the interpreter to differentiate between a method and a
4631 method invocation when these are used as an argument to the ObjectType
4632 operator. The ACPI specification change is to disallow a method
4634 (UserTerm) for the ObjectType operator.
4636 Finish support for the TPM2 and CSRT tables in the headers, table
4637 compiler, and disassembler.
4639 Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
4640 always expires immediately if the semaphore is not available. The
4642 code was using a relative-time timeout, but sem_timedwait requires the
4644 of an absolute time.
4646 iASL: Added a remark if the Timer() operator is used within a 32-bit
4647 table. This operator returns a 64-bit time value that will be truncated
4648 within a 32-bit table.
4650 iASL Source code restructuring: Cleanup to improve modularity. The
4651 following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
4652 aslmethod.c, and aslfileio.c. Associated makefiles and project files have
4656 ----------------------------------------
4657 14 November 2012. Summary of changes for version 20121114:
4659 1) ACPICA Kernel-resident Subsystem:
4661 Implemented a performance enhancement for ACPI/AML Package objects. This
4662 change greatly increases the performance of Package objects within the
4663 interpreter. It changes the processing of reference counts for packages
4665 optimizing for the most common case where the package sub-objects are
4666 either Integers, Strings, or Buffers. Increases the overall performance
4668 the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
4670 Chao Guan. ACPICA BZ 943.
4672 Implemented and deployed common macros to extract flag bits from resource
4673 descriptors. Improves readability and maintainability of the code. Fixes
4675 problem with the UART serial bus descriptor for the number of data bits
4676 flags (was incorrectly 2 bits, should be 3).
4678 Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
4679 of the macros and changed the SETx macros to the style of (destination,
4680 source). Also added ACPI_CASTx companion macros. Lv Zheng.
4682 Example Code and Data Size: These are the sizes for the OS-independent
4683 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4684 debug version of the code includes the debug output trace mechanism and
4685 has a much larger code and data size.
4688 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
4689 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4691 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
4692 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4695 2) iASL Compiler/Disassembler and Tools:
4697 Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
4698 adds the ShareAndWake and ExclusiveAndWake flags which were added to the
4699 Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
4701 Disassembler: Fixed a problem with external declaration generation. Fixes
4702 a problem where an incorrect pathname could be generated for an external
4703 declaration if the original reference to the object includes leading
4704 carats (^). ACPICA BZ 984.
4706 Debugger: Completed a major update for the Disassemble<method> command.
4707 This command was out-of-date and did not properly disassemble control
4708 methods that had any reasonable complexity. This fix brings the command
4710 to the same level as the rest of the disassembler. Adds one new file,
4711 dmdeferred.c, which is existing code that is now common with the main
4712 disassembler and the debugger disassemble command. ACPICA MZ 978.
4714 iASL: Moved the parser entry prototype to avoid a duplicate declaration.
4715 Newer versions of Bison emit this prototype, so moved the prototype out
4717 the iASL header to where it is actually used in order to avoid a
4721 iASL/Tools: Standardized use of the stream I/O functions:
4722 1) Ensure check for I/O error after every fopen/fread/fwrite
4723 2) Ensure proper order of size/count arguments for fread/fwrite
4724 3) Use test of (Actual != Requested) after all fwrite, and most fread
4725 4) Standardize I/O error messages
4726 Improves reliability and maintainability of the code. Bob Moore, Lv
4730 Disassembler: Prevent duplicate External() statements. During generation
4731 of external statements, detect similar pathnames that are actually
4732 duplicates such as these:
4735 Remove all leading '\' characters from pathnames during the external
4736 statement generation so that duplicates will be detected and tossed.
4739 Tools: Replace low-level I/O with stream I/O functions. Replace
4740 open/read/write/close with the stream I/O equivalents
4741 fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
4744 AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
4745 name header so that AcpiXtract recognizes the output file/table.
4747 iASL: Remove obsolete -2 option flag. Originally intended to force the
4748 compiler/disassembler into an ACPI 2.0 mode, this was never implemented
4749 and the entire concept is now obsolete.
4751 ----------------------------------------
4752 18 October 2012. Summary of changes for version 20121018:
4755 1) ACPICA Kernel-resident Subsystem:
4757 Updated support for the ACPI 5.0 MPST table. Fixes some problems
4758 introduced by late changes to the table as it was added to the ACPI 5.0
4759 specification. Includes header, disassembler, and data table compiler
4760 support as well as a new version of the MPST template.
4762 AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
4763 5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
4764 methods: _HID, _CID, and _UID.
4766 Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
4767 ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
4768 name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
4769 names for their various drivers. Affects the AcpiGetObjectInfo external
4770 interface, and other internal interfaces as well.
4772 Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
4773 This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
4774 on machines that support non-aligned transfers. Optimizes for this case
4775 rather than using a strncpy. With assistance from Zheng Lv.
4777 Resource Manager: Small fix for buffer size calculation. Fixed a one byte
4778 error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
4780 Added a new debug print message for AML mutex objects that are force-
4781 released. At control method termination, any currently acquired mutex
4782 objects are force-released. Adds a new debug-only message for each one
4785 Audited/updated all ACPICA return macros and the function debug depth
4786 counter: 1) Ensure that all functions that use the various TRACE macros
4787 also use the appropriate ACPICA return macros. 2) Ensure that all normal
4788 return statements surround the return expression (value) with parens to
4789 ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
4790 Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
4792 Global source code changes/maintenance: All extra lines at the start and
4793 end of each source file have been removed for consistency. Also, within
4794 comments, all new sentences start with a single space instead of a double
4795 space, again for consistency across the code base.
4797 Example Code and Data Size: These are the sizes for the OS-independent
4798 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4799 debug version of the code includes the debug output trace mechanism and
4800 has a much larger code and data size.
4803 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
4804 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
4806 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
4807 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
4810 2) iASL Compiler/Disassembler and Tools:
4812 AcpiExec: Improved the algorithm used for memory leak/corruption
4813 detection. Added some intelligence to the code that maintains the global
4814 list of allocated memory. The list is now ordered by allocated memory
4815 address, significantly improving performance. When running AcpiExec on
4816 the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
4817 on the platform and/or the environment. Note, this performance
4818 enhancement affects the AcpiExec utility only, not the kernel-resident
4821 Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
4822 the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
4823 incorrect table offset reported for invalid opcodes. Report the original
4824 32-bit value for bad ACPI_NAMEs (as well as the repaired name.)
4826 Disassembler: Enhanced the -vt option to emit the binary table data in
4827 hex format to assist with debugging.
4829 Fixed a potential filename buffer overflow in osunixdir.c. Increased the
4830 size of file structure. Colin Ian King.
4832 ----------------------------------------
4833 13 September 2012. Summary of changes for version 20120913:
4836 1) ACPICA Kernel-resident Subsystem:
4838 ACPI 5.0: Added two new notify types for the Hardware Error Notification
4839 Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
4843 Table Manager: Merged/removed duplicate code in the root table resize
4844 functions. One function is external, the other is internal. Lv Zheng,
4848 Makefiles: Completely removed the obsolete "Linux" makefiles under
4849 acpica/generate/linux. These makefiles are obsolete and have been
4852 the generic unix makefiles under acpica/generate/unix.
4854 Makefiles: Ensure that binary files always copied properly. Minor rule
4856 to ensure that the final binary output files are always copied up to the
4857 appropriate binary directory (bin32 or bin64.)
4859 Example Code and Data Size: These are the sizes for the OS-independent
4860 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4862 version of the code includes the debug output trace mechanism and has a
4864 larger code and data size.
4867 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
4868 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
4870 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
4871 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
4874 2) iASL Compiler/Disassembler and Tools:
4876 Disassembler: Fixed a possible fault during the disassembly of resource
4877 descriptors when a second parse is required because of the invocation of
4878 external control methods within the table. With assistance from
4879 adq@lidskialf.net. ACPICA BZ 976.
4881 iASL: Fixed a namepath optimization problem. An error can occur if the
4883 node that contains the namepath to be optimized does not have a parent
4885 that is a named object. This change fixes the problem.
4887 iASL: Fixed a regression where the AML file is not deleted on errors. The
4889 output file should be deleted if there are any errors during the
4892 only exception is if the -f (force output) option is used. ACPICA BZ 974.
4894 iASL: Added a feature to automatically increase internal line buffer
4896 Via realloc(), automatically increase the internal line buffer sizes as
4897 necessary to support very long source code lines. The current version of
4899 preprocessor requires a buffer long enough to contain full source code
4901 This change increases the line buffer(s) if the input lines go beyond the
4902 current buffer size. This eliminates errors that occurred when a source
4904 line was longer than the buffer.
4906 iASL: Fixed a problem with constant folding in method declarations. The
4907 SyncLevel term is a ByteConstExpr, and incorrect code would be generated
4909 Type3 opcode was used.
4911 Debugger: Improved command help support. For incorrect argument count,
4913 full help for the command. For help command itself, allow an argument to
4916 Test Suites: Several bug fixes for the ASLTS suite reduces the number of
4917 errors during execution of the suite. Guan Chao.
4919 ----------------------------------------
4920 16 August 2012. Summary of changes for version 20120816:
4923 1) ACPICA Kernel-resident Subsystem:
4925 Removed all use of the deprecated _GTS and _BFS predefined methods. The
4927 (Going To Sleep) and _BFS (Back From Sleep) methods are essentially
4928 deprecated and will probably be removed from the ACPI specification.
4930 does not invoke them, and reportedly never will. The final nail in the
4932 is that the ACPI specification states that these methods must be run with
4933 interrupts off, which is not going to happen in a kernel interpreter.
4935 Linux has removed all use of the methods also. It was discovered that
4936 invoking these functions caused failures on some machines, probably
4938 they were never tested since Windows does not call them. Affects two
4940 interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
4943 Implemented support for complex bit-packed buffers returned from the _PLD
4944 (Physical Location of Device) predefined method. Adds a new external
4945 interface, AcpiDecodePldBuffer that parses the buffer into a more usable
4947 structure. Note: C Bitfields cannot be used for this type of predefined
4948 structure since the memory layout of individual bitfields is not defined
4950 the C language. In addition, there are endian concerns where a compiler
4952 change the bitfield ordering based on the machine type. The new ACPICA
4953 interface eliminates these issues, and should be called after _PLD is
4954 executed. ACPICA BZ 954.
4956 Implemented a change to allow a scope change to root (via "Scope (\)")
4958 execution of module-level ASL code (code that is executed at table load
4961 Added the Windows8/Server2012 string for the _OSI method. This change
4964 new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
4967 Added header support for the new ACPI tables DBG2 (Debug Port Table Type
4969 and CSRT (Core System Resource Table).
4971 Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
4972 names. This simplifies access to the buffers returned by these predefined
4973 names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
4975 GPE support: Removed an extraneous parameter from the various low-level
4976 internal GPE functions. Tang Feng.
4978 Removed the linux makefiles from the unix packages. The generate/linux
4979 makefiles are obsolete and have been removed from the unix tarball
4981 packages. The replacement makefiles are under generate/unix, and there is
4983 top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
4985 Updates for Unix makefiles:
4986 1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
4987 2) Update linker flags (move to end of command line) for AcpiExec
4991 Split ACPICA initialization functions to new file, utxfinit.c. Split from
4992 utxface.c to improve modularity and reduce file size.
4994 Example Code and Data Size: These are the sizes for the OS-independent
4995 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4996 debug version of the code includes the debug output trace mechanism and
4998 much larger code and data size.
5001 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
5002 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
5004 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
5005 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
5008 2) iASL Compiler/Disassembler and Tools:
5010 iASL: Fixed a problem with constant folding for fixed-length constant
5011 expressions. The constant-folding code was not being invoked for constant
5012 expressions that allow the use of type 3/4/5 opcodes to generate
5014 for expressions such as ByteConstExpr, WordConstExpr, etc. This could
5016 in the generation of invalid AML bytecode. ACPICA BZ 970.
5018 iASL: Fixed a generation issue on newer versions of Bison. Newer versions
5019 apparently automatically emit some of the necessary externals. This
5021 handles these versions in order to eliminate generation warnings.
5023 Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
5025 Disassembler: Add support to decode _PLD buffers. The decoded buffer
5027 within comments in the output file.
5029 Debugger: Fixed a regression with the "Threads" command where
5030 AE_BAD_PARAMETER was always returned.
5032 ----------------------------------------
5033 11 July 2012. Summary of changes for version 20120711:
5035 1) ACPICA Kernel-resident Subsystem:
5037 Fixed a possible fault in the return package object repair code. Fixes a
5038 problem that can occur when a lone package object is wrapped with an
5040 package object in order to force conformance to the ACPI specification.
5042 affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
5046 Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
5047 PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
5048 ARB_DIS bit must be implemented in the host-dependent C3 processor power
5050 support. Note, ARB_DIS is obsolete and only applies to older chipsets,
5052 Intel and other vendors. (for Intel: ICH4-M and earlier)
5054 This change removes the code to disable/enable bus master arbitration
5056 suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
5058 resume problems on some machines. The change has been in use for over
5062 Implemented two new external interfaces to support host-directed dynamic
5064 table load and unload. They are intended to simplify the host
5066 of hot-plug support:
5067 AcpiLoadTable: Load an SSDT from a buffer into the namespace.
5068 AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
5070 See the ACPICA reference for additional details. Adds one new file,
5071 components/tables/tbxfload.c
5073 Implemented and deployed two new interfaces for errors and warnings that
5075 known to be caused by BIOS/firmware issues:
5076 AcpiBiosError: Prints "ACPI Firmware Error" message.
5077 AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
5078 Deployed these new interfaces in the ACPICA Table Manager code for ACPI
5080 and FADT errors. Additional deployment to be completed as appropriate in
5082 future. The associated conditional macros are ACPI_BIOS_ERROR and
5083 ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
5088 Implicit notify support: ensure that no memory allocation occurs within a
5089 critical region. This fix moves a memory allocation outside of the time
5091 spinlock is held. Fixes issues on systems that do not allow this
5095 Split exception code utilities and tables into a new file,
5098 Example Code and Data Size: These are the sizes for the OS-independent
5099 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5101 version of the code includes the debug output trace mechanism and has a
5103 larger code and data size.
5106 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
5107 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
5109 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
5110 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
5113 2) iASL Compiler/Disassembler and Tools:
5115 iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
5119 Debugger: Enhanced the "tables" command to emit additional information
5121 the current set of ACPI tables, including the owner ID and flags decode.
5123 Debugger: Reimplemented the "unload" command to use the new
5124 AcpiUnloadParentTable external interface. This command was disable
5126 due to need for an unload interface.
5128 AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
5130 will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
5132 ----------------------------------------
5133 20 June 2012. Summary of changes for version 20120620:
5136 1) ACPICA Kernel-resident Subsystem:
5138 Implemented support to expand the "implicit notify" feature to allow
5140 devices to be notified by a single GPE. This feature automatically
5142 runtime device notification in the absence of a BIOS-provided GPE control
5143 method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
5145 provided by ACPICA for Windows compatibility, and is a workaround for
5148 code errors. See the description of the AcpiSetupGpeForWake interface in
5150 APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
5152 Changed some comments and internal function names to simplify and ensure
5153 correctness of the Linux code translation. No functional changes.
5155 Example Code and Data Size: These are the sizes for the OS-independent
5156 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5158 version of the code includes the debug output trace mechanism and has a
5160 larger code and data size.
5163 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
5164 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
5166 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
5167 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
5170 2) iASL Compiler/Disassembler and Tools:
5172 Disassembler: Added support to emit short, commented descriptions for the
5174 predefined names in order to improve the readability of the disassembled
5175 output. ACPICA BZ 959. Changes include:
5176 1) Emit descriptions for all standard predefined names (_INI, _STA,
5179 2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
5180 3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
5183 AcpiSrc: Fixed several long-standing Linux code translation issues.
5185 descriptions in function headers are now translated properly to lower
5188 underscores. ACPICA BZ 961. Also fixes translation problems such as
5194 local_fADT -> local_FADT
5195 execute_oSI -> execute_OSI
5197 iASL: Fixed a problem where null bytes were inadvertently emitted into
5201 iASL: Added the existing debug options to the standard help screen. There
5203 no longer two different help screens. ACPICA BZ 957.
5205 AcpiHelp: Fixed some typos in the various predefined name descriptions.
5207 expand some of the descriptions where appropriate.
5209 iASL: Fixed the -ot option (display compile times/statistics). Was not
5211 properly for standard output; only worked for the debug file case.
5213 ----------------------------------------
5214 18 May 2012. Summary of changes for version 20120518:
5217 1) ACPICA Core Subsystem:
5219 Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
5221 to block until asynchronous events such as notifies and GPEs have
5223 Within ACPICA, it is only called before a notify or GPE handler is
5224 removed/uninstalled. It also may be useful for the host OS within related
5225 drivers such as the Embedded Controller driver. See the ACPICA reference
5227 additional information. ACPICA BZ 868.
5229 ACPI Tables: Added a new error message for a possible overflow failure
5231 the conversion of FADT 32-bit legacy register addresses to internal
5234 bit GAS structure representation. The GAS has a one-byte "bit length"
5236 thus limiting the register length to 255 bits. ACPICA BZ 953.
5238 Example Code and Data Size: These are the sizes for the OS-independent
5239 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5241 version of the code includes the debug output trace mechanism and has a
5243 larger code and data size.
5246 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5247 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
5249 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
5250 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
5253 2) iASL Compiler/Disassembler and Tools:
5255 iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
5257 This keyword was added late in the ACPI 5.0 release cycle and was not
5258 implemented until now.
5260 Disassembler: Added support for Operation Region externals. Adds missing
5261 support for operation regions that are defined in another table, and
5262 referenced locally via a Field or BankField ASL operator. Now generates
5264 correct External statement.
5266 Disassembler: Several additional fixes for the External() statement
5268 related to some ASL operators. Also, order the External() statements
5269 alphabetically in the disassembler output. Fixes the External()
5272 the Create* field, Alias, and Scope operators:
5273 1) Create* buffer field operators - fix type mismatch warning on
5275 2) Alias - implement missing External support
5276 3) Scope - fix to make sure all necessary externals are emitted.
5278 iASL: Improved pathname support. For include files, merge the prefix
5280 with the file pathname and eliminate unnecessary components. Convert
5281 backslashes in all pathnames to forward slashes, for readability. Include
5283 pathname changes affect both #include and Include() type operators.
5285 iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
5287 of a valid line by inserting a newline and then returning the EOF during
5289 next call to GetNextLine. Prevents the line from being ignored due to EOF
5292 iASL: Implemented some changes to enhance the IDE support (-vi option.)
5294 and Warning messages are now correctly recognized for both the source
5296 browser and the global error and warning counts.
5298 ----------------------------------------
5299 20 April 2012. Summary of changes for version 20120420:
5302 1) ACPICA Core Subsystem:
5304 Implemented support for multiple notify handlers. This change adds
5307 allow multiple system and device notify handlers on Device, Thermal Zone,
5309 Processor objects. This can simplify the host OS notification
5311 Also re-worked and restructured the entire notify support code to
5313 handler installation, handler removal, notify event queuing, and notify
5314 dispatch to handler(s). Note: there can still only be two global notify
5315 handlers - one for system notifies and one for device notifies. There are
5317 changes to the existing handler install/remove interfaces. Lin Ming, Bob
5318 Moore, Rafael Wysocki.
5320 Fixed a regression in the package repair code where the object reference
5321 count was calculated incorrectly. Regression was introduced in the commit
5322 "Support to add Package wrappers".
5324 Fixed a couple possible memory leaks in the AML parser, in the error
5326 path. Jesper Juhl, Lin Ming.
5328 Example Code and Data Size: These are the sizes for the OS-independent
5329 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5330 debug version of the code includes the debug output trace mechanism and
5332 much larger code and data size.
5335 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5336 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5338 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5339 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
5342 2) iASL Compiler/Disassembler and Tools:
5344 iASL: Fixed a problem with the resource descriptor support where the
5346 of the StartDependentFn and StartDependentFnNoPrio descriptors were not
5347 included in cumulative descriptor offset, resulting in incorrect values
5349 resource tags within resource descriptors appearing after a
5351 descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
5353 iASL and Preprocessor: Implemented full support for the #line directive
5355 correctly track original source file line numbers through the .i
5357 output file - for error and warning messages.
5359 iASL: Expand the allowable byte constants for address space IDs.
5361 the allowable range was 0x80-0xFF (user-defined spaces), now the range is
5362 0x0A-0xFF to allow for custom and new IDs without changing the compiler.
5364 iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
5366 iASL: Add option to completely disable the preprocessor (-Pn).
5368 iASL: Now emit all error/warning messages to standard error (stderr) by
5369 default (instead of the previous stdout).
5371 ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
5373 for resource descriptor offset fix above. Update/cleanup error output
5374 routines. Enable and send iASL errors/warnings to an error logfile
5375 (error.txt). Send all other iASL output to a logfile (compiler.txt).
5377 several extraneous "unrecognized operator" messages.
5379 ----------------------------------------
5380 20 March 2012. Summary of changes for version 20120320:
5383 1) ACPICA Core Subsystem:
5385 Enhanced the sleep/wake interfaces to optionally execute the _GTS method
5386 (Going To Sleep) and the _BFS method (Back From Sleep). Windows
5388 does not execute these methods, and therefore these methods are often
5389 untested. It has been seen on some systems where the execution of these
5390 methods causes errors and also prevents the machine from entering S5. It
5392 therefore suggested that host operating systems do not execute these
5394 by default. In the future, perhaps these methods can be optionally
5396 based on the age of the system and/or what is the newest version of
5398 that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
5400 AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
5403 Fixed a problem where the length of the local/common FADT was set too
5405 The local FADT table length cannot be set to the common length until the
5406 original length has been examined. There is code that checks the table
5408 and sets various fields appropriately. This can affect older machines
5410 early FADT versions. For example, this can cause inadvertent writes to
5412 CST_CNT register. Julian Anastasov.
5414 Fixed a mapping issue related to a physical table override. Use the
5416 mapping mechanism for tables loaded via the physical override OSL
5418 This allows for early mapping before the virtual memory manager is
5420 Thomas Renninger, Bob Moore.
5422 Enhanced the automatic return-object repair code: Repair a common problem
5424 predefined methods that are defined to return a variable-length Package
5426 sub-objects. If there is only one sub-object, some BIOS ASL code
5428 simply returns the single object instead of a Package with one sub-
5430 This new support will repair this error by wrapping a Package object
5432 the original object, creating the correct and expected Package with one
5434 object. Names that can be repaired in this manner include: _ALR, _CSD,
5436 _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
5439 Changed the exception code returned for invalid ACPI paths passed as
5440 parameters to external interfaces such as AcpiEvaluateObject. Was
5441 AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
5443 Example Code and Data Size: These are the sizes for the OS-independent
5444 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5446 version of the code includes the debug output trace mechanism and has a
5448 larger code and data size.
5451 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
5452 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5454 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
5455 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5458 2) iASL Compiler/Disassembler and Tools:
5460 iASL: Added the infrastructure and initial implementation of a integrated
5462 like preprocessor. This will simplify BIOS development process by
5464 the need for a separate preprocessing step during builds. On Windows, it
5466 eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
5467 features including full #define() macro support are still under
5469 These preprocessor directives are supported:
5482 In addition, these new command line options are supported:
5483 -D <symbol> Define symbol for preprocessor use
5484 -li Create preprocessed output file (*.i)
5485 -P Preprocess only and create preprocessor output file (*.i)
5487 Table Compiler: Fixed a problem where the equals operator within an
5489 did not work properly.
5491 Updated iASL to use the current versions of Bison/Flex. Updated the
5493 project file to invoke these tools from the standard location. ACPICA BZ
5496 Flex for Windows: V2.5.4
5497 Bison for Windows: V2.4.1
5499 ----------------------------------------
5500 15 February 2012. Summary of changes for version 20120215:
5503 1) ACPICA Core Subsystem:
5505 There have been some major changes to the sleep/wake support code, as
5506 described below (a - e).
5508 a) The AcpiLeaveSleepState has been split into two interfaces, similar to
5509 AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
5510 AcpiLeaveSleepStatePrep. This allows the host to perform actions between
5512 time the _BFS method is called and the _WAK method is called. NOTE: all
5514 must update their wake/resume code or else sleep/wake will not work
5518 b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
5520 method. Some machines require that the GPEs are enabled before the _WAK
5522 is executed. Thomas Renninger.
5524 c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
5526 Some BIOS code assumes that WAK_STS will be cleared on resume and use it
5528 determine whether the system is rebooting or resuming. Matthew Garrett.
5530 d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
5532 match the ACPI specification requirement. Rafael Wysocki.
5534 e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
5535 registers within the V5 FADT. This support adds two new files:
5536 hardware/hwesleep.c implements the support for the new registers. Moved
5538 sleep/wake external interfaces to hardware/hwxfsleep.c.
5541 Added a new OSL interface for ACPI table overrides,
5542 AcpiOsPhysicalTableOverride. This interface allows the host to override a
5543 table via a physical address, instead of the logical address required by
5544 AcpiOsTableOverride. This simplifies the host implementation. Initial
5545 implementation by Thomas Renninger. The ACPICA implementation creates a
5547 shared function for table overrides that attempts both a logical and a
5550 Expanded the OSL memory read/write interfaces to 64-bit data
5551 (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
5552 transfer support for GAS register structures passed to AcpiRead and
5555 Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
5557 build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
5559 See the ACPICA reference for details. ACPICA BZ 942. This option removes
5561 10% of the code and 5% of the static data, and the following hardware
5563 features become unavailable:
5564 PM Event and Control registers
5565 SCI interrupt (and handler)
5567 General Purpose Events (GPEs)
5570 FACS table (Waking vectors and Global Lock)
5572 Updated the unix tarball directory structure to match the ACPICA git
5574 tree. This ensures that the generic unix makefiles work properly (in
5575 generate/unix). Also updated the Linux makefiles to match. ACPICA BZ
5578 Updated the return value of the _REV predefined method to integer value 5
5580 reflect ACPI 5.0 support.
5582 Moved the external ACPI PM timer interface prototypes to the public
5584 file where they belong.
5586 Example Code and Data Size: These are the sizes for the OS-independent
5587 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5589 version of the code includes the debug output trace mechanism and has a
5591 larger code and data size.
5594 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
5595 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
5597 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
5598 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
5601 2) iASL Compiler/Disassembler and Tools:
5603 Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
5604 descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
5605 incorrectly displayed.
5607 AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
5610 ----------------------------------------
5611 11 January 2012. Summary of changes for version 20120111:
5614 1) ACPICA Core Subsystem:
5616 Implemented a new mechanism to allow host device drivers to check for
5618 range conflicts with ACPI Operation Regions. Both SystemMemory and
5620 address spaces are supported. A new external interface,
5621 AcpiCheckAddressRange,
5622 allows drivers to check an address range against the ACPI namespace. See
5624 ACPICA reference for additional details. Adds one new file,
5625 utilities/utaddress.c. Lin Ming, Bob Moore.
5627 Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
5630 Status registers, update the ACPI 5.0 flags, and update internal data
5631 structures to handle an FADT larger than 256 bytes. The size of the ACPI
5635 Updated all ACPICA copyrights and signons to 2012. Added the 2012
5637 all module headers and signons, including the standard Linux header. This
5638 affects virtually every file in the ACPICA core subsystem, iASL compiler,
5640 all ACPICA utilities.
5642 Example Code and Data Size: These are the sizes for the OS-independent
5643 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5645 version of the code includes the debug output trace mechanism and has a
5647 larger code and data size.
5650 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
5651 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
5653 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
5654 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
5657 2) iASL Compiler/Disassembler and Tools:
5659 Disassembler: fixed a problem with the automatic resource tag generation
5660 support. Fixes a problem where the resource tags are inadvertently not
5661 constructed if the table being disassembled contains external references
5663 control methods. Moved the actual construction of the tags to after the
5665 namespace is constructed (after 2nd parse is invoked due to external
5667 method references.) ACPICA BZ 941.
5669 Table Compiler: Make all "generic" operators caseless. These are the
5671 like UINT8, String, etc. Making these caseless improves ease-of-use.
5675 ----------------------------------------
5676 23 November 2011. Summary of changes for version 20111123:
5678 0) ACPI 5.0 Support:
5680 This release contains full support for the ACPI 5.0 specification, as
5683 Reduced Hardware Support:
5684 -------------------------
5686 This support allows for ACPI systems without the usual ACPI hardware.
5688 support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
5690 not attempt to initialize or use any of the usual ACPI hardware. Note,
5692 this flag is set, all of the following ACPI hardware is assumed to be not
5693 present and is not initialized or accessed:
5695 General Purpose Events (GPEs)
5696 Fixed Events (PM1a/PM1b and PM Control)
5697 Power Management Timer and Console Buttons (power/sleep)
5698 Real-time Clock Alarm
5700 System Control Interrupt (SCI)
5701 The FACS is assumed to be non-existent
5706 All new tables and updates to existing tables are fully supported in the
5707 ACPICA headers (for use by device drivers), the disassembler, and the
5709 Data Table Compiler. ACPI 5.0 defines these new tables:
5711 BGRT /* Boot Graphics Resource Table */
5712 DRTM /* Dynamic Root of Trust for Measurement table */
5713 FPDT /* Firmware Performance Data Table */
5714 GTDT /* Generic Timer Description Table */
5715 MPST /* Memory Power State Table */
5716 PCCT /* Platform Communications Channel Table */
5717 PMTT /* Platform Memory Topology Table */
5718 RASF /* RAS Feature table */
5720 Operation Regions/SpaceIDs:
5721 ---------------------------
5723 All new operation regions are fully supported by the iASL compiler, the
5724 disassembler, and the ACPICA runtime code (for dispatch to region
5726 The new operation region Space IDs are:
5731 Resource Descriptors:
5732 ---------------------
5734 All new ASL resource descriptors are fully supported by the iASL
5737 ASL/AML disassembler, and the ACPICA runtime Resource Manager code
5739 all new predefined resource tags). New descriptors are:
5748 ASL/AML Operators, New and Modified:
5749 ------------------------------------
5751 One new operator is added, the Connection operator, which is used to
5753 a GeneralPurposeIo or GenericSerialBus resource descriptor with
5755 field objects within an operation region. Several new protocols are
5757 with the AccessAs operator. All are fully supported by the iASL compiler,
5758 disassembler, and runtime ACPICA AML interpreter:
5760 Connection // Declare Field Connection
5762 AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol
5763 AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes
5765 AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
5766 RawDataBuffer // Data type for Vendor Data
5769 Predefined ASL/AML Objects:
5770 ---------------------------
5772 All new predefined objects/control-methods are supported by the iASL
5774 and the ACPICA runtime validation/repair (arguments and return values.)
5776 predefined names include the following:
5778 Standard Predefined Names (Objects or Control Methods):
5779 _AEI, _CLS, _CPC, _CWS, _DEP,
5780 _DLM, _EVT, _GCP, _CRT, _GWS,
5781 _HRV, _PRE, _PSE, _SRT, _SUB.
5783 Resource Tags (Names used to access individual fields within resource
5785 _DBT, _DPL, _DRS, _END, _FLC,
5786 _IOR, _LIN, _MOD, _PAR, _PHA,
5787 _PIN, _PPI, _POL, _RXL, _SLV,
5788 _SPE, _STB, _TXL, _VEN.
5790 ACPICA External Interfaces:
5791 ---------------------------
5793 Several new interfaces have been defined for use by ACPI-related device
5794 drivers and other host OS services:
5796 AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
5798 acquire and release AML mutexes that are defined in the DSDT/SSDT tables
5799 provided by the BIOS. They are intended to be used in conjunction with
5801 ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
5802 mutual exclusion with the AML code/interpreter.
5804 AcpiGetEventResources: Returns the (formatted) resource descriptors as
5806 by the ACPI 5.0 _AEI object (ACPI Event Information). This object
5808 resource descriptors associated with hardware-reduced platform events,
5810 to the AcpiGetCurrentResources interface.
5812 Operation Region Handlers: For General Purpose IO and Generic Serial Bus
5813 operation regions, information about the Connection() object and any
5815 length information is passed to the region handler within the Context
5818 AcpiBufferToResource: This interface converts a raw AML buffer containing
5820 resource template or resource descriptor to the ACPI_RESOURCE internal
5822 suitable for use by device drivers. Can be used by an operation region
5824 to convert the Connection() buffer object into a ACPI_RESOURCE.
5826 Miscellaneous/Tools/TestSuites:
5827 -------------------------------
5829 Support for extended _HID names (Four alpha characters instead of three).
5830 Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
5831 Support for ACPI 5.0 features in the ASLTS test suite.
5832 Fully updated documentation (ACPICA and iASL reference documents.)
5834 ACPI Table Definition Language:
5835 -------------------------------
5837 Support for this language was implemented and released as a subsystem of
5839 iASL compiler in 2010. (See the iASL compiler User Guide.)
5842 Non-ACPI 5.0 changes for this release:
5843 --------------------------------------
5845 1) ACPICA Core Subsystem:
5847 Fix a problem with operation region declarations where a failure can
5850 the region name and an argument that evaluates to an object (such as the
5851 region address) are in different namespace scopes. Lin Ming, ACPICA BZ
5854 Do not abort an ACPI table load if an invalid space ID is found within.
5856 will be caught later if the offending method is executed. ACPICA BZ 925.
5858 Fixed an issue with the FFixedHW space ID where the ID was not always
5859 recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
5861 Fixed a problem with the 32-bit generation of the unix-specific OSL
5862 (osunixxf.c). Lin Ming, ACPICA BZ 936.
5864 Several changes made to enable generation with the GCC 4.6 compiler.
5868 New error messages: Unsupported I/O requests (not 8/16/32 bit), and
5870 field registers out-of-range.
5872 2) iASL Compiler/Disassembler and Tools:
5874 iASL: Implemented the __PATH__ operator, which returns the full pathname
5876 the current source file.
5878 AcpiHelp: Automatically display expanded keyword information for all ASL
5881 Debugger: Add "Template" command to disassemble/dump resource template
5884 Added a new master script to generate and execute the ASLTS test suite.
5885 Automatically handles 32- and 64-bit generation. See tests/aslts.sh
5887 iASL: Fix problem with listing generation during processing of the
5889 operator where AML listing was disabled until the entire Switch block was
5892 iASL: Improve support for semicolon statement terminators. Fix "invalid
5893 character" message for some cases when the semicolon is used. Semicolons
5895 now allowed after every <Term> grammar element. ACPICA BZ 927.
5897 iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
5900 Disassembler: Fix problem with disassembly of the DataTableRegion
5902 where an inadvertent "Unhandled deferred opcode" message could be
5905 3) Example Code and Data Size
5907 These are the sizes for the OS-independent acpica.lib produced by the
5908 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
5909 includes the debug output trace mechanism and has a much larger code and
5914 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
5915 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
5917 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
5918 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
5920 ----------------------------------------
5921 22 September 2011. Summary of changes for version 20110922:
5925 Support for ACPI 5.0 in ACPICA has been underway for several months and
5927 be released at the same time that ACPI 5.0 is officially released.
5929 The ACPI 5.0 specification is on track for release in the next few
5932 1) ACPICA Core Subsystem:
5934 Fixed a problem where the maximum sleep time for the Sleep() operator was
5935 intended to be limited to two seconds, but was inadvertently limited to
5939 Linux and Unix makefiles: Added header file dependencies to ensure
5941 generation of ACPICA core code and utilities. Also simplified the
5943 considerably through the use of the vpath variable to specify search
5947 2) iASL Compiler/Disassembler and Tools:
5949 iASL: Implemented support to check the access length for all fields
5951 access named Resource Descriptor fields. For example, if a resource field
5953 defined to be two bits, a warning is issued if a CreateXxxxField() is
5955 with an incorrect bit length. This is implemented for all current
5957 descriptor names. ACPICA BZ 930.
5959 Disassembler: Fixed a byte ordering problem with the output of 24-bit and
5963 iASL: Fixed a couple of issues associated with variable-length package
5964 objects. 1) properly handle constants like One, Ones, Zero -- do not make
5966 VAR_PACKAGE when these are used as a package length. 2) Allow the
5968 opcode (in addition to PACKAGE) when validating object types for
5972 iASL: Emit statistics for all output files (instead of just the ASL input
5974 AML output). Includes listings, hex files, etc.
5976 iASL: Added -G option to the table compiler to allow the compilation of
5978 ACPI tables. The only part of a table that is required is the standard
5983 AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
5985 which also adds correct 64-bit support. Also, now all output filenames
5987 completely lower case.
5989 AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
5990 loading table files. A warning is issued for any such tables. The only
5991 exception is an FADT. This also fixes a possible fault when attempting to
5993 non-AML tables. ACPICA BZ 932.
5995 AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
5997 missing table terminator could cause a fault when using the -p option.
5999 AcpiSrc: Fixed a possible divide-by-zero fault when generating file
6002 3) Example Code and Data Size
6004 These are the sizes for the OS-independent acpica.lib produced by the
6005 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
6006 includes the debug output trace mechanism and has a much larger code and
6010 Previous Release (VC 9.0):
6011 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6012 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6013 Current Release (VC 9.0):
6014 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6015 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6018 ----------------------------------------
6019 23 June 2011. Summary of changes for version 20110623:
6021 1) ACPI CA Core Subsystem:
6023 Updated the predefined name repair mechanism to not attempt repair of a
6025 return object if a _PSS object is present. We can only sort the _TSS
6027 package if there is no _PSS within the same scope. This is because if
6030 present, the ACPI specification dictates that the _TSS Power Dissipation
6032 is to be ignored, and therefore some BIOSs leave garbage values in the
6034 Power field(s). In this case, it is best to just return the _TSS package
6036 is. Reported by, and fixed with assistance from Fenghua Yu.
6038 Added an option to globally disable the control method return value
6040 and repair. This runtime option can be used to disable return value
6043 this is causing a problem on a particular machine. Also added an option
6045 AcpiExec (-dr) to set this disable flag.
6047 All makefiles and project files: Major changes to improve generation of
6049 tools. ACPICA BZ 912:
6050 Reduce default optimization levels to improve compatibility
6051 For Linux, add strict-aliasing=0 for gcc 4
6052 Cleanup and simplify use of command line defines
6053 Cleanup multithread library support
6054 Improve usage messages
6056 Linux-specific header: update handling of THREAD_ID and pthread. For the
6058 bit case, improve casting to eliminate possible warnings, especially with
6062 Example Code and Data Size: These are the sizes for the OS-independent
6063 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6065 version of the code includes the debug output trace mechanism and has a
6067 larger code and data size.
6069 Previous Release (VC 9.0):
6070 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
6071 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6072 Current Release (VC 9.0):
6073 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
6074 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6076 2) iASL Compiler/Disassembler and Tools:
6078 With this release, a new utility named "acpihelp" has been added to the
6080 package. This utility summarizes the ACPI specification chapters for the
6082 and AML languages. It generates under Linux/Unix as well as Windows, and
6083 provides the following functionality:
6084 Find/display ASL operator(s) -- with description and syntax.
6085 Find/display ASL keyword(s) -- with exact spelling and descriptions.
6086 Find/display ACPI predefined name(s) -- with description, number
6087 of arguments, and the return value data type.
6088 Find/display AML opcode name(s) -- with opcode, arguments, and
6090 Decode/display AML opcode -- with opcode name, arguments, and
6093 Service Layers: Make multi-thread support configurable. Conditionally
6095 the multi-thread support so that threading libraries will not be linked
6098 necessary. The only tool that requires multi-thread support is AcpiExec.
6100 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
6102 Bison appear to want the interface to yyerror to be a const char * (or at
6103 least this is a problem when generating iASL on some systems.) ACPICA BZ
6107 Tools: Fix for systems where O_BINARY is not defined. Only used for
6109 versions of the tools.
6111 ----------------------------------------
6112 27 May 2011. Summary of changes for version 20110527:
6114 1) ACPI CA Core Subsystem:
6116 ASL Load() operator: Reinstate most restrictions on the incoming ACPI
6118 signature. Now, only allow SSDT, OEMx, and a null signature. History:
6119 1) Originally, we checked the table signature for "SSDT" or "PSDT".
6120 (PSDT is now obsolete.)
6121 2) We added support for OEMx tables, signature "OEM" plus a fourth
6122 "don't care" character.
6123 3) Valid tables were encountered with a null signature, so we just
6124 gave up on validating the signature, (05/2008).
6125 4) We encountered non-AML tables such as the MADT, which caused
6126 interpreter errors and kernel faults. So now, we once again allow
6127 only SSDT, OEMx, and now, also a null signature. (05/2011).
6129 Added the missing _TDL predefined name to the global name list in order
6131 enable validation. Affects both the core ACPICA code and the iASL
6134 Example Code and Data Size: These are the sizes for the OS-independent
6135 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6137 version of the code includes the debug output trace mechanism and has a
6139 larger code and data size.
6141 Previous Release (VC 9.0):
6142 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
6143 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
6144 Current Release (VC 9.0):
6145 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
6146 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
6148 2) iASL Compiler/Disassembler and Tools:
6150 Debugger/AcpiExec: Implemented support for "complex" method arguments on
6152 debugger command line. This adds support beyond simple integers --
6154 Strings, Buffers, and Packages. Includes support for nested packages.
6155 Increased the default command line buffer size to accommodate these
6157 See the ACPICA reference for details and syntax. ACPICA BZ 917.
6159 Debugger/AcpiExec: Implemented support for "default" method arguments for
6161 Execute/Debug command. Now, the debugger will always invoke a control
6163 with the required number of arguments -- even if the command line
6165 none or insufficient arguments. It uses default integer values for any
6167 arguments. Also fixes a bug where only six method arguments maximum were
6168 supported instead of the required seven.
6170 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
6172 also return status in order to prevent buffer overruns. See the ACPICA
6173 reference for details and syntax. ACPICA BZ 921
6175 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
6176 makefiles to simplify support for the two different but similar parser
6177 generators, bison and yacc.
6179 Updated the generic unix makefile for gcc 4. The default gcc version is
6181 expected to be 4 or greater, since options specific to gcc 4 are used.
6183 ----------------------------------------
6184 13 April 2011. Summary of changes for version 20110413:
6186 1) ACPI CA Core Subsystem:
6188 Implemented support to execute a so-called "orphan" _REG method under the
6190 device. This change will force the execution of a _REG method underneath
6193 device even if there is no corresponding operation region of type
6194 EmbeddedControl. Fixes a problem seen on some machines and apparently is
6195 compatible with Windows behavior. ACPICA BZ 875.
6197 Added more predefined methods that are eligible for automatic NULL
6199 element removal. This change adds another group of predefined names to
6202 of names that can be repaired by having NULL package elements dynamically
6203 removed. This group are those methods that return a single variable-
6205 package containing simple data types such as integers, buffers, strings.
6207 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
6210 and _TZD. ACPICA BZ 914.
6212 Split and segregated all internal global lock functions to a new file,
6215 Updated internal address SpaceID for DataTable regions. Moved this
6218 id in preparation for ACPI 5.0 changes that will include some new space
6221 change should not affect user/host code.
6223 Example Code and Data Size: These are the sizes for the OS-independent
6225 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
6227 the code includes the debug output trace mechanism and has a much larger
6232 Previous Release (VC 9.0):
6233 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
6234 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
6235 Current Release (VC 9.0):
6236 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
6237 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
6239 2) iASL Compiler/Disassembler and Tools:
6241 iASL/DTC: Major update for new grammar features. Allow generic data types
6243 custom ACPI tables. Field names are now optional. Any line can be split
6245 multiple lines using the continuation char (\). Large buffers now use
6247 continuation character(s) and no colon on the continuation lines. See the
6249 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
6252 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
6254 Since the parser stuffs a "zero" as the return value for these statements
6257 the underlying AML grammar), they were seen as "return with value" by the
6259 semantic checking. They are now seen correctly as "null" return
6262 iASL: Check if a_REG declaration has a corresponding Operation Region.
6264 check for each _REG to ensure that there is in fact a corresponding
6266 region declaration in the same scope. If not, the _REG method is not very
6268 since it probably won't be executed. ACPICA BZ 915.
6270 iASL/DTC: Finish support for expression evaluation. Added a new
6273 that implements c-style operator precedence and parenthesization. ACPICA
6277 Disassembler/DTC: Remove support for () and <> style comments in data
6280 that DTC has full expression support, we don't want to have comment
6283 start with a parentheses or a less-than symbol. Now, only the standard /*
6286 comments are supported, as well as the bracket [] comments.
6288 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
6290 headers in the acpidump file. Update the header validation to support
6292 tables. Problem introduced in previous AcpiXtract version in the change
6294 support "wrong checksum" error messages emitted by acpidump utility.
6296 iASL: Add a * option to generate all template files (as a synonym for
6300 "iasl -T *" or "iasl -T ALL".
6302 iASL/DTC: Do not abort compiler on fatal errors. We do not want to
6304 abort the compiler on "fatal" errors, simply should abort the current
6306 This allows multiple compiles with a single (possibly wildcard) compiler
6309 ----------------------------------------
6310 16 March 2011. Summary of changes for version 20110316:
6312 1) ACPI CA Core Subsystem:
6314 Fixed a problem caused by a _PRW method appearing at the namespace root
6316 during the setup of wake GPEs. A fault could occur if a _PRW directly
6319 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
6321 Implemented support for "spurious" Global Lock interrupts. On some
6323 global lock interrupt can occur without the pending flag being set. Upon
6326 interrupt, we now ensure that a thread is actually waiting for the lock
6328 signaling GL availability. Rafael Wysocki, Bob Moore.
6330 Example Code and Data Size: These are the sizes for the OS-independent
6332 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
6334 the code includes the debug output trace mechanism and has a much larger
6339 Previous Release (VC 9.0):
6340 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6341 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6342 Current Release (VC 9.0):
6343 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
6344 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
6346 2) iASL Compiler/Disassembler and Tools:
6348 Implemented full support for the "SLIC" ACPI table. Includes support in
6350 header files, disassembler, table compiler, and template generator. Bob
6354 AcpiXtract: Correctly handle embedded comments and messages from
6356 Apparently some or all versions of acpidump will occasionally emit a
6359 "Wrong checksum", etc., into the dump file. This was causing problems for
6360 AcpiXtract. ACPICA BZ 905.
6362 iASL: Fix the Linux makefile by removing an inadvertent double file
6366 AcpiExec: Update installation of operation region handlers. Install one
6368 for a user-defined address space. This is used by the ASL test suite
6371 ----------------------------------------
6372 11 February 2011. Summary of changes for version 20110211:
6374 1) ACPI CA Core Subsystem:
6376 Added a mechanism to defer _REG methods for some early-installed
6378 Most user handlers should be installed before call to
6379 AcpiEnableSubsystem.
6380 However, Event handlers and region handlers should be installed after
6381 AcpiInitializeObjects. Override handlers for the "default" regions should
6383 installed early, however. This change executes all _REG methods for the
6384 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
6385 chicken/egg issues between them. ACPICA BZ 848.
6387 Implemented an optimization for GPE detection. This optimization will
6389 ignore GPE registers that contain no enabled GPEs -- there is no need to
6390 read the register since this information is available internally. This
6391 becomes more important on machines with a large GPE space. ACPICA
6393 884. Lin Ming. Suggestion from Joe Liu.
6395 Removed all use of the highly unreliable FADT revision field. The
6397 number in the FADT has been found to be completely unreliable and cannot
6399 trusted. Only the actual table length can be used to infer the version.
6401 change updates the ACPICA core and the disassembler so that both no
6403 even look at the FADT version and instead depend solely upon the FADT
6406 Fix an unresolved name issue for the no-debug and no-error-message source
6407 generation cases. The _AcpiModuleName was left undefined in these cases,
6409 it is actually needed as a parameter to some interfaces. Define
6410 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
6412 Split several large files (makefiles and project files updated)
6413 utglobal.c -> utdecode.c
6414 dbcomds.c -> dbmethod.c dbnames.c
6415 dsopcode.c -> dsargs.c dscontrol.c
6416 dsload.c -> dsload2.c
6417 aslanalyze.c -> aslbtypes.c aslwalks.c
6419 Example Code and Data Size: These are the sizes for the OS-independent
6420 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6421 debug version of the code includes the debug output trace mechanism and
6423 a much larger code and data size.
6425 Previous Release (VC 9.0):
6426 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6427 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6428 Current Release (VC 9.0):
6429 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6430 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6432 2) iASL Compiler/Disassembler and Tools:
6434 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
6435 These are useful C-style macros with the standard definitions. ACPICA
6438 iASL/DTC: Added support for integer expressions and labels. Support for
6440 expressions for all integer fields in all ACPI tables. Support for labels
6442 "generic" portions of tables such as UEFI. See the iASL reference manual.
6444 Debugger: Added a command to display the status of global handlers. The
6445 "handlers" command will display op region, fixed event, and miscellaneous
6446 global handlers. installation status -- and for op regions, whether
6448 or user-installed handler will be used.
6450 iASL: Warn if reserved method incorrectly returns a value. Many
6452 names are defined such that they do not return a value. If implemented as
6454 method, issue a warning if such a name explicitly returns a value. ACPICA
6457 iASL: Added detection of GPE method name conflicts. Detects a conflict
6459 there are two GPE methods of the form _Lxy and _Exy in the same scope.
6461 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
6463 iASL/DTC: Fixed a couple input scanner issues with comments and line
6464 numbers. Comment remover could get confused and miss a comment ending.
6466 a problem with line counter maintenance.
6468 iASL/DTC: Reduced the severity of some errors from fatal to error. There
6470 no need to abort on simple errors within a field definition.
6472 Debugger: Simplified the output of the help command. All help output now
6474 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
6476 ----------------------------------------
6477 12 January 2011. Summary of changes for version 20110112:
6479 1) ACPI CA Core Subsystem:
6481 Fixed a race condition between method execution and namespace walks that
6483 possibly cause a fault. The problem was apparently introduced in version
6484 20100528 as a result of a performance optimization that reduces the
6487 namespace walks upon method exit by using the delete_namespace_subtree
6488 function instead of the delete_namespace_by_owner function used
6490 Bug is a missing namespace lock in the delete_namespace_subtree function.
6491 dana.myers@oracle.com
6493 Fixed several issues and a possible fault with the automatic "serialized"
6494 method support. History: This support changes a method to "serialized" on
6496 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
6497 possibility that it cannot handle reentrancy. This fix repairs a couple
6499 issues seen in the field, especially on machines with many cores:
6501 1) Delete method children only upon the exit of the last thread,
6502 so as to not delete objects out from under other running threads
6503 (and possibly causing a fault.)
6504 2) Set the "serialized" bit for the method only upon the exit of the
6505 Last thread, so as to not cause deadlock when running threads
6507 3) Cleanup the use of the AML "MethodFlags" and internal method flags
6508 so that there is no longer any confusion between the two.
6510 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
6512 Debugger: Now lock the namespace for duration of a namespace dump.
6514 issues if the namespace is changing dynamically underneath the debugger.
6515 Especially affects temporary namespace nodes, since the debugger displays
6518 Updated the ordering of include files. The ACPICA headers should appear
6519 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
6521 any necessary compiler-specific defines, etc. Affects the ACPI-related
6525 Updated all ACPICA copyrights and signons to 2011. Added the 2011
6527 to all module headers and signons, including the Linux header. This
6529 virtually every file in the ACPICA core subsystem, iASL compiler, and all
6532 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
6533 project files for VC++ 6.0 are now obsolete. New project files can be
6535 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
6538 Example Code and Data Size: These are the sizes for the OS-independent
6539 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6540 debug version of the code includes the debug output trace mechanism and
6542 much larger code and data size.
6544 Previous Release (VC 6.0):
6545 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
6546 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
6547 Current Release (VC 9.0):
6548 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
6549 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
6551 2) iASL Compiler/Disassembler and Tools:
6553 iASL: Added generic data types to the Data Table compiler. Add "generic"
6555 types such as UINT32, String, Unicode, etc., to simplify the generation
6557 platform-defined tables such as UEFI. Lin Ming.
6559 iASL: Added listing support for the Data Table Compiler. Adds listing
6561 (-l) to display actual binary output for each line of input code.
6563 ----------------------------------------
6564 09 December 2010. Summary of changes for version 20101209:
6566 1) ACPI CA Core Subsystem:
6568 Completed the major overhaul of the GPE support code that was begun in
6570 2010. Major features include: removal of _PRW execution in ACPICA (host
6571 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
6572 changes to existing interfaces, simplification of GPE handler operation,
6574 a handful of new interfaces:
6580 One new file, evxfgpe.c to consolidate all external GPE interfaces.
6582 See the ACPICA Programmer Reference for full details and programming
6583 information. See the new section 4.4 "General Purpose Event (GPE)
6585 for a full overview, and section 8.7 "ACPI General Purpose Event
6587 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
6589 Bob Moore, Rafael Wysocki.
6591 Implemented a new GPE feature for Windows compatibility, the "Implicit
6593 GPE Notify". This feature will automatically issue a Notify(2) on a
6595 when a Wake GPE is received if there is no corresponding GPE method or
6596 handler. ACPICA BZ 870.
6598 Fixed a problem with the Scope() operator during table parse and load
6600 During load phase (table load or method execution), the scope operator
6602 not enter the target into the namespace. Instead, it should open a new
6604 at the target location. Linux BZ 19462, ACPICA BZ 882.
6606 Example Code and Data Size: These are the sizes for the OS-independent
6607 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6608 debug version of the code includes the debug output trace mechanism and
6610 much larger code and data size.
6613 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
6614 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
6616 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6617 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6619 2) iASL Compiler/Disassembler and Tools:
6621 iASL: Relax the alphanumeric restriction on _CID strings. These strings
6623 "bus-specific" per the ACPI specification, and therefore any characters
6625 acceptable. The only checks that can be performed are for a null string
6627 perhaps for a leading asterisk. ACPICA BZ 886.
6629 iASL: Fixed a problem where a syntax error that caused a premature EOF
6630 condition on the source file emitted a very confusing error message. The
6631 premature EOF is now detected correctly. ACPICA BZ 891.
6633 Disassembler: Decode the AccessSize within a Generic Address Structure
6635 access, word access, etc.) Note, this field does not allow arbitrary bit
6636 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
6638 New: AcpiNames utility - Example namespace dump utility. Shows an example
6640 ACPICA configuration for a minimal namespace dump utility. Uses table and
6641 namespace managers, but no AML interpreter. Does not add any
6643 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
6644 partition and configure ACPICA. ACPICA BZ 883.
6646 AML Debugger: Increased the debugger buffer size for method return
6648 Was 4K, increased to 16K. Also enhanced error messages for debugger
6650 execution, including the buffer overflow case.
6652 ----------------------------------------
6653 13 October 2010. Summary of changes for version 20101013:
6655 1) ACPI CA Core Subsystem:
6657 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
6659 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
6660 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
6662 Changed the type of the predefined namespace object _TZ from ThermalZone
6664 Device. This was found to be confusing to the host software that
6666 the various thermal zones, since _TZ is not really a ThermalZone.
6669 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
6672 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
6673 string is "Windows 2006 SP2".
6675 Eliminated duplicate code in AcpiUtExecute* functions. Now that the
6677 code automatically repairs _HID-related strings, this type of code is no
6678 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
6681 Example Code and Data Size: These are the sizes for the OS-independent
6682 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6683 debug version of the code includes the debug output trace mechanism and
6685 much larger code and data size.
6688 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6689 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6691 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6692 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6694 2) iASL Compiler/Disassembler and Tools:
6696 iASL: Implemented additional compile-time validation for _HID strings.
6698 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
6701 the string must be exactly seven or eight characters. For both _HID and
6703 strings, all characters must be alphanumeric. ACPICA BZ 874.
6705 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
6706 descriptors that are mostly or all zeros, with the expectation that they
6708 be filled in at runtime. iASL now allows this as long as there is a
6710 tag" (name) associated with the descriptor, which gives the ASL a handle
6711 needed to modify the descriptor. ACPICA BZ 873.
6713 Added single-thread support to the generic Unix application OSL.
6715 for iASL support, this change removes the use of semaphores in the
6717 threaded ACPICA tools/applications - increasing performance. The
6718 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
6719 option. ACPICA BZ 879.
6721 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
6723 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
6725 iASL: Moved all compiler messages to a new file, aslmessages.h.
6727 ----------------------------------------
6728 15 September 2010. Summary of changes for version 20100915:
6730 1) ACPI CA Core Subsystem:
6732 Removed the AcpiOsDerivePciId OSL interface. The various host
6734 of this function were not OS-dependent and are now obsolete and can be
6735 removed from all host OSLs. This function has been replaced by
6736 AcpiHwDerivePciId, which is now part of the ACPICA core code.
6737 AcpiHwDerivePciId has been implemented without recursion. Adds one new
6738 module, hwpci.c. ACPICA BZ 857.
6740 Implemented a dynamic repair for _HID and _CID strings. The following
6741 problems are now repaired at runtime: 1) Remove a leading asterisk in the
6742 string, and 2) the entire string is uppercased. Both repairs are in
6743 accordance with the ACPI specification and will simplify host driver
6747 The ACPI_THREAD_ID type is no longer configurable, internally it is now
6748 always UINT64. This simplifies the ACPICA code, especially any printf
6750 UINT64 is the only common data type for all thread_id types across all
6751 operating systems. It is now up to the host OSL to cast the native
6753 type to UINT64 before returning the value to ACPICA (via
6755 Lin Ming, Bob Moore.
6757 Added the ACPI_INLINE type to enhance the ACPICA configuration. The
6759 keyword is not standard across compilers, and this type allows inline to
6761 configured on a per-compiler basis. Lin Ming.
6763 Made the system global AcpiGbl_SystemAwakeAndRunning publically
6765 Added an extern for this boolean in acpixf.h. Some hosts utilize this
6767 during suspend/restore operations. ACPICA BZ 869.
6769 All code that implements error/warning messages with the "ACPI:" prefix
6771 been moved to a new module, utxferror.c.
6773 The UINT64_OVERLAY was moved to utmath.c, which is the only module where
6775 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
6777 Example Code and Data Size: These are the sizes for the OS-independent
6778 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6779 debug version of the code includes the debug output trace mechanism and
6781 much larger code and data size.
6784 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
6785 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
6787 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
6788 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
6790 2) iASL Compiler/Disassembler and Tools:
6792 iASL/Disassembler: Write ACPI errors to stderr instead of the output
6794 This keeps the output files free of random error messages that may
6796 from within the namespace/interpreter code. Used this opportunity to
6798 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
6799 866. Lin Ming, Bob Moore.
6801 Tools: update some printfs for ansi warnings on size_t. Handle width
6803 of size_t on 32-bit versus 64-bit generations. Lin Ming.
6805 ----------------------------------------
6806 06 August 2010. Summary of changes for version 20100806:
6808 1) ACPI CA Core Subsystem:
6810 Designed and implemented a new host interface to the _OSI support code.
6812 will allow the host to dynamically add or remove multiple _OSI strings,
6814 well as install an optional handler that is called for each _OSI
6816 Also added a new AML debugger command, 'osi' to display and modify the
6818 _OSI string table, and test support in the AcpiExec utility. See the
6820 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
6822 AcpiInstallInterface - Add an _OSI string.
6823 AcpiRemoveInterface - Delete an _OSI string.
6824 AcpiInstallInterfaceHandler - Install optional _OSI handler.
6826 AcpiOsValidateInterface - no longer used.
6828 source/components/utilities/utosi.c
6830 Re-introduced the support to enable multi-byte transfers for Embedded
6831 Controller (EC) operation regions. A reported problem was found to be a
6833 in the host OS, not in the multi-byte support. Previously, the maximum
6835 size passed to the EC operation region handler was a single byte. There
6837 often EC Fields larger than one byte that need to be transferred, and it
6839 useful for the EC driver to lock these as a single transaction. This
6841 enables single transfers larger than 8 bits. This effectively changes the
6842 access to the EC space from ByteAcc to AnyAcc, and will probably require
6843 changes to the host OS Embedded Controller driver to enable 16/32/64/256-
6845 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
6847 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
6848 prototype in acpiosxf.h had the output value pointer as a (void *).
6849 It should be a (UINT64 *). This may affect some host OSL code.
6851 Fixed a couple problems with the recently modified Linux makefiles for
6853 and AcpiExec. These new makefiles place the generated object files in the
6854 local directory so that there can be no collisions between the files that
6856 shared between them that are compiled with different options.
6858 Example Code and Data Size: These are the sizes for the OS-independent
6859 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6860 debug version of the code includes the debug output trace mechanism and
6862 much larger code and data size.
6865 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
6866 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
6868 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
6869 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
6871 2) iASL Compiler/Disassembler and Tools:
6873 iASL/Disassembler: Added a new option (-da, "disassemble all") to load
6875 namespace from and disassemble an entire group of AML files. Useful for
6876 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
6878 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
6880 iASL: Allow multiple invocations of -e option. This change allows
6882 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
6886 ----------------------------------------
6887 02 July 2010. Summary of changes for version 20100702:
6889 1) ACPI CA Core Subsystem:
6891 Implemented several updates to the recently added GPE reference count
6892 support. The model for "wake" GPEs is changing to give the host OS
6894 control of these GPEs. Eventually, the ACPICA core will not execute any
6896 methods, since the host already must execute them. Also, additional
6898 were made to help ensure that the reference counts are kept in proper
6899 synchronization with reality. Rafael J. Wysocki.
6901 1) Ensure that GPEs are not enabled twice during initialization.
6902 2) Ensure that GPE enable masks stay in sync with the reference count.
6903 3) Do not inadvertently enable GPEs when writing GPE registers.
6904 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
6905 interface. This interface will set or clear individual GPEs for wakeup.
6906 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These
6908 are now used for "runtime" GPEs only.
6910 Changed the behavior of the GPE install/remove handler interfaces. The
6913 no longer disabled during this process, as it was found to cause problems
6915 some machines. Rafael J. Wysocki.
6917 Reverted a change introduced in version 20100528 to enable Embedded
6918 Controller multi-byte transfers. This change was found to cause problems
6920 Index Fields and possibly Bank Fields. It will be reintroduced when these
6921 problems have been resolved.
6923 Fixed a problem with references to Alias objects within Package Objects.
6925 reference to an Alias within the definition of a Package was not always
6926 resolved properly. Aliases to objects like Processors, Thermal zones,
6928 were resolved to the actual object instead of a reference to the object
6931 should be. Package objects are only allowed to contain integer, string,
6932 buffer, package, and reference objects. Redhat bugzilla 608648.
6934 Example Code and Data Size: These are the sizes for the OS-independent
6935 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6936 debug version of the code includes the debug output trace mechanism and
6938 much larger code and data size.
6941 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
6942 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
6944 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
6945 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
6947 2) iASL Compiler/Disassembler and Tools:
6949 iASL: Implemented a new compiler subsystem to allow definition and
6950 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
6952 are called "ACPI Data Tables", and the new compiler is the "Data Table
6953 Compiler". This compiler is intended to simplify the existing error-prone
6954 process of creating these tables for the BIOS, as well as allowing the
6955 disassembly, modification, recompilation, and override of existing ACPI
6957 tables. See the iASL User Guide for detailed information.
6959 iASL: Implemented a new Template Generator option in support of the new
6961 Table Compiler. This option will create examples of all known ACPI tables
6962 that can be used as the basis for table development. See the iASL
6963 documentation and the -T option.
6965 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
6968 Updated the Linux makefiles for iASL and AcpiExec to place the generated
6969 object files in the local directory so that there can be no collisions
6970 between the shared files between them that are generated with different
6973 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
6975 the #define __APPLE__ to enable this support.
6977 ----------------------------------------
6978 28 May 2010. Summary of changes for version 20100528:
6980 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
6981 available at www.acpi.info. This is primarily an errata release.
6983 1) ACPI CA Core Subsystem:
6985 Undefined ACPI tables: We are looking for the definitions for the
6987 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
6989 Implemented support to enable multi-byte transfers for Embedded
6991 (EC) operation regions. Previously, the maximum data size passed to the
6993 operation region handler was a single byte. There are often EC Fields
6995 than one byte that need to be transferred, and it is useful for the EC
6997 to lock these as a single transaction. This change enables single
6999 larger than 8 bits. This effectively changes the access to the EC space
7001 ByteAcc to AnyAcc, and will probably require changes to the host OS
7003 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
7005 transfers. Alexey Starikovskiy, Lin Ming
7007 Implemented a performance enhancement for namespace search and access.
7009 change enhances the performance of namespace searches and walks by adding
7011 backpointer to the parent in each namespace node. On large namespaces,
7013 change can improve overall ACPI performance by up to 9X. Adding a pointer
7015 each namespace node increases the overall size of the internal namespace
7017 about 5%, since each namespace entry usually consists of both a namespace
7018 node and an ACPI operand object. However, this is the first growth of the
7019 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
7021 Implemented a performance optimization that reduces the number of
7023 walks. On control method exit, only walk the namespace if the method is
7025 to have created namespace objects outside of its local scope. Previously,
7027 entire namespace was traversed on each control method exit. This change
7029 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
7032 Added support to truncate I/O addresses to 16 bits for Windows
7034 Some ASL code has been seen in the field that inadvertently has bits set
7035 above bit 15. This feature is optional and is enabled if the BIOS
7037 any Windows OSI strings. It can also be enabled by the host OS. Matthew
7040 Added support to limit the maximum time for the ASL Sleep() operator. To
7041 prevent accidental deep sleeps, limit the maximum time that Sleep() will
7042 actually sleep. Configurable, the default maximum is two seconds. ACPICA
7045 Added run-time validation support for the _WDG and_WED Microsoft
7047 methods. These objects are defined by "Windows Instrumentation", and are
7049 part of the ACPI spec. ACPICA BZ 860.
7051 Expanded all statistic counters used during namespace and device
7052 initialization from 16 to 32 bits in order to support very large
7055 Replaced all instances of %d in printf format specifiers with %u since
7057 all integers in ACPICA are unsigned.
7059 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
7063 Example Code and Data Size: These are the sizes for the OS-independent
7064 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7065 debug version of the code includes the debug output trace mechanism and
7067 much larger code and data size.
7070 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
7071 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
7073 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
7074 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
7076 2) iASL Compiler/Disassembler and Tools:
7078 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
7079 methods. These objects are defined by "Windows Instrumentation", and are
7081 part of the ACPI spec. ACPICA BZ 860.
7083 AcpiExec: added option to disable the memory tracking mechanism. The -dt
7084 option will disable the tracking mechanism, which improves performance
7087 AcpiExec: Restructured the command line options into -d (disable) and -e
7090 ----------------------------------------
7091 28 April 2010. Summary of changes for version 20100428:
7093 1) ACPI CA Core Subsystem:
7095 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
7096 including FADT-based and GPE Block Devices, execute any _PRW methods in
7098 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
7099 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
7100 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
7101 Devices. Provides compatibility with other ACPI implementations. Two new
7102 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
7105 Fixed a regression introduced in version 20100331 within the table
7107 where initial table loading could fail. This was introduced in the fix
7109 AcpiReallocateRootTable. Also, renamed some of fields in the table
7111 data structures to clarify their meaning and use.
7113 Fixed a possible allocation overrun during internal object copy in
7114 AcpiUtCopySimpleObject. The original code did not correctly handle the
7116 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
7119 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
7120 possible access beyond end-of-allocation. Also, now fully validate
7122 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
7124 Example Code and Data Size: These are the sizes for the OS-independent
7125 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7126 debug version of the code includes the debug output trace mechanism and
7128 much larger code and data size.
7131 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
7132 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
7134 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
7135 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
7137 2) iASL Compiler/Disassembler and Tools:
7139 iASL: Implemented Min/Max/Len/Gran validation for address resource
7140 descriptors. This change implements validation for the address fields
7142 are common to all address-type resource descriptors. These checks are
7143 implemented: Checks for valid Min/Max, length within the Min/Max window,
7144 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
7146 table 6-40 in the ACPI 4.0a specification. Also split the large
7148 and aslrestype2.c files into five new files. ACPICA BZ 840.
7150 iASL: Added support for the _Wxx predefined names. This support was
7152 and these names were not recognized by the compiler as valid predefined
7153 names. ACPICA BZ 851.
7155 iASL: Added an error for all predefined names that are defined to return
7157 value and thus must be implemented as Control Methods. These include all
7159 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
7160 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
7162 iASL: Implemented the -ts option to emit hex AML data in ASL format, as
7164 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
7166 dynamically loaded via the Load() operator. Also cleaned up output for
7169 ta and -tc options. ACPICA BZ 853.
7171 Tests: Added a new file with examples of extended iASL error checking.
7172 Demonstrates the advanced error checking ability of the iASL compiler.
7173 Available at tests/misc/badcode.asl.
7175 ----------------------------------------
7176 31 March 2010. Summary of changes for version 20100331:
7178 1) ACPI CA Core Subsystem:
7180 Completed a major update for the GPE support in order to improve support
7182 shared GPEs and to simplify both host OS and ACPICA code. Added a
7184 count mechanism to support shared GPEs that require multiple device
7186 Several external interfaces have changed. One external interface has been
7187 removed. One new external interface was added. Most of the GPE external
7188 interfaces now use the GPE spinlock instead of the events mutex (and the
7189 Flags parameter for many GPE interfaces has been removed.) See the
7191 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
7193 Wysocki. ACPICA BZ 831.
7196 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
7202 Implemented write support for DataTable operation regions. These regions
7204 defined via the DataTableRegion() operator. Previously, only read support
7206 implemented. The ACPI specification allows DataTableRegions to be
7210 Implemented a new subsystem option to force a copy of the DSDT to local
7211 memory. Optionally copy the entire DSDT to local memory (instead of
7213 mapping it.) There are some (albeit very rare) BIOSs that corrupt or
7215 the original DSDT, creating the need for this option. Default is FALSE,
7219 Implemented detection of a corrupted or replaced DSDT. This change adds
7220 support to detect a DSDT that has been corrupted and/or replaced from
7222 the OS (by firmware). This is typically catastrophic for the system, but
7224 been seen on some machines. Once this problem has been detected, the DSDT
7225 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
7227 Fixed two problems with AcpiReallocateRootTable during the root table
7229 When copying the root table to the new allocation, the length used was
7230 incorrect. The new size was used instead of the current table size,
7232 too much data was copied. Also, the count of available slots for ACPI
7234 was not set correctly. Alexey Starikovskiy, Bob Moore.
7236 Example Code and Data Size: These are the sizes for the OS-independent
7237 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7238 debug version of the code includes the debug output trace mechanism and
7240 much larger code and data size.
7243 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
7244 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
7246 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
7247 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
7249 2) iASL Compiler/Disassembler and Tools:
7251 iASL: Implement limited typechecking for values returned from predefined
7252 control methods. The type of any returned static (unnamed) object is now
7253 validated. For example, Return(1). ACPICA BZ 786.
7255 iASL: Fixed a predefined name object verification regression. Fixes a
7257 introduced in version 20100304. An error is incorrectly generated if a
7258 predefined name is declared as a static named object with a value defined
7259 using the keywords "Zero", "One", or "Ones". Lin Ming.
7261 iASL: Added Windows 7 support for the -g option (get local ACPI tables)
7263 reducing the requested registry access rights. ACPICA BZ 842.
7265 Disassembler: fixed a possible fault when generating External()
7267 Introduced in commit ae7d6fd: Properly handle externals with parent-
7269 (carat). Fixes a string length allocation calculation. Lin Ming.
7271 ----------------------------------------
7272 04 March 2010. Summary of changes for version 20100304:
7274 1) ACPI CA Core Subsystem:
7276 Fixed a possible problem with the AML Mutex handling function
7277 AcpiExReleaseMutex where the function could fault under the very rare
7278 condition when the interpreter has blocked, the interpreter lock is
7280 the interpreter is then reentered via the same thread, and attempts to
7281 acquire an AML mutex that was previously acquired. FreeBSD report 140979.
7285 Implemented additional configuration support for the AML "Debug Object".
7286 Output from the debug object can now be enabled via a global variable,
7287 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
7289 This debug output is now available in the release version of ACPICA
7291 of just the debug version. Also, the entire debug output module can now
7293 configured out of the ACPICA build if desired. One new file added,
7294 executer/exdebug.c. Lin Ming, Bob Moore.
7296 Added header support for the ACPI MCHI table (Management Controller Host
7297 Interface Table). This table was added in ACPI 4.0, but the defining
7299 has only recently become available.
7301 Standardized output of integer values for ACPICA warnings/errors. Always
7303 0x prefix for hex output, always use %u for unsigned integer decimal
7305 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
7307 invocations.) These invocations were converted from the original
7308 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
7310 Example Code and Data Size: These are the sizes for the OS-independent
7311 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7312 debug version of the code includes the debug output trace mechanism and
7314 much larger code and data size.
7317 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
7318 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
7320 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
7321 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
7323 2) iASL Compiler/Disassembler and Tools:
7325 iASL: Implemented typechecking support for static (non-control method)
7326 predefined named objects that are declared with the Name() operator. For
7327 example, the type of this object is now validated to be of type Integer:
7328 Name(_BBN, 1). This change migrates the compiler to using the core
7330 name table instead of maintaining a local version. Added a new file,
7331 aslpredef.c. ACPICA BZ 832.
7333 Disassembler: Added support for the ACPI 4.0 MCHI table.
7335 ----------------------------------------
7336 21 January 2010. Summary of changes for version 20100121:
7338 1) ACPI CA Core Subsystem:
7340 Added the 2010 copyright to all module headers and signons. This affects
7341 virtually every file in the ACPICA core subsystem, the iASL compiler, the
7342 tools/utilities, and the test suites.
7344 Implemented a change to the AcpiGetDevices interface to eliminate
7346 invocations of the _STA method. In the case where a specific _HID is
7347 requested, do not run _STA until a _HID match is found. This eliminates
7348 potentially dozens of _STA calls during a search for a particular
7350 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
7352 Implemented an additional repair for predefined method return values.
7354 to repair unexpected NULL elements within returned Package objects.
7357 Integer of value zero, a NULL String, or a zero-length Buffer as
7359 ACPICA BZ 818. Lin Ming, Bob Moore.
7361 Removed the obsolete ACPI_INTEGER data type. This type was introduced as
7363 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
7365 64-bit AML integers). It is now obsolete and this change removes it from
7367 ACPICA code base, replaced by UINT64. The original typedef has been
7369 for now for compatibility with existing device driver code. ACPICA BZ
7372 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
7374 the parse tree object.
7376 Added additional warning options for the gcc-4 generation. Updated the
7378 accordingly. This includes some code restructuring to eliminate
7380 code, elimination of some gotos, elimination of unused return values,
7382 additional casting, and removal of redundant declarations.
7384 Example Code and Data Size: These are the sizes for the OS-independent
7385 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7386 debug version of the code includes the debug output trace mechanism and
7388 much larger code and data size.
7391 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
7392 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
7394 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
7395 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
7397 2) iASL Compiler/Disassembler and Tools:
7399 No functional changes for this release.
7401 ----------------------------------------
7402 14 December 2009. Summary of changes for version 20091214:
7404 1) ACPI CA Core Subsystem:
7406 Enhanced automatic data type conversions for predefined name repairs.
7408 change expands the automatic repairs/conversions for predefined name
7410 values to make Integers, Strings, and Buffers fully interchangeable.
7413 Buffer can be converted to a Package of Integers if necessary. The
7415 module was completely restructured. Lin Ming, Bob Moore.
7417 Implemented automatic removal of null package elements during predefined
7419 repairs. This change will automatically remove embedded and trailing NULL
7420 package elements from returned package objects that are defined to
7423 variable number of sub-packages. The driver is then presented with a
7425 with no null elements to deal with. ACPICA BZ 819.
7427 Implemented a repair for the predefined _FDE and _GTM names. The expected
7428 return value for both names is a Buffer of 5 DWORDs. This repair fixes
7430 possible problems (both seen in the field), where a package of integers
7432 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
7435 Implemented additional module-level code support. This change will
7437 execute module-level code that is not at the root of the namespace (under
7439 Device object, etc.). Now executes the code within the current scope
7441 of the root. ACPICA BZ 762. Lin Ming.
7443 Fixed possible mutex acquisition errors when running _REG methods. Fixes
7445 problem where mutex errors can occur when running a _REG method that is
7447 the same scope as a method-defined operation region or an operation
7449 under a module-level IF block. This type of code is rare, so the problem
7451 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
7453 Fixed a possible memory leak during module-level code execution. An
7455 could be leaked for each block of executed module-level code if the
7456 interpreter slack mode is enabled This change deletes any implicitly
7458 object from the module-level code block. Lin Ming.
7460 Removed messages for successful predefined repair(s). The repair
7462 was considered too wordy. Now, messages are only unconditionally emitted
7464 the return object cannot be repaired. Existing messages for successful
7465 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
7468 Example Code and Data Size: These are the sizes for the OS-independent
7469 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7470 debug version of the code includes the debug output trace mechanism and
7472 much larger code and data size.
7475 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
7476 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
7478 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
7479 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
7481 2) iASL Compiler/Disassembler and Tools:
7483 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
7485 were no longer automatically removed at the termination of the compile.
7487 acpiexec: Implemented the -f option to specify default region fill value.
7488 This option specifies the value used to initialize buffers that simulate
7489 operation regions. Default value is zero. Useful for debugging problems
7491 depend on a specific initial value for a region or field.
7493 ----------------------------------------
7494 12 November 2009. Summary of changes for version 20091112:
7496 1) ACPI CA Core Subsystem:
7498 Implemented a post-order callback to AcpiWalkNamespace. The existing
7499 interface only has a pre-order callback. This change adds an additional
7500 parameter for a post-order callback which will be more useful for bus
7502 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
7504 Modified the behavior of the operation region memory mapping cache for
7505 SystemMemory. Ensure that the memory mappings created for operation
7507 do not cross 4K page boundaries. Crossing a page boundary while mapping
7508 regions can cause kernel warnings on some hosts if the pages have
7510 attributes. Such regions are probably BIOS bugs, and this is the
7512 Linux BZ 14445. Lin Ming.
7514 Implemented an automatic repair for predefined methods that must return
7515 sorted lists. This change will repair (by sorting) packages returned by
7517 _PSS, and _TSS. Drivers can now assume that the packages are correctly
7519 and do not contain NULL package elements. Adds one new file,
7520 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
7522 Fixed a possible fault during predefined name validation if a return
7524 object contains NULL elements. Also adds a warning if a NULL element is
7525 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
7527 include repair or removal of all such NULL elements where possible.
7529 Implemented additional module-level executable AML code support. This
7531 will execute module-level code that is not at the root of the namespace
7532 (under a Device object, etc.) at table load time. Module-level executable
7534 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
7536 Implemented a new internal function to create Integer objects. This
7538 simplifies miscellaneous object creation code. ACPICA BZ 823.
7540 Reduced the severity of predefined repair messages, Warning to Info.
7542 the object was successfully repaired, a warning is too severe. Reduced to
7544 info message for now. These messages may eventually be changed to debug-
7548 Example Code and Data Size: These are the sizes for the OS-independent
7549 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7550 debug version of the code includes the debug output trace mechanism and
7552 much larger code and data size.
7555 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
7556 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
7558 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
7559 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
7561 2) iASL Compiler/Disassembler and Tools:
7563 iASL: Implemented Switch() with While(1) so that Break works correctly.
7565 change correctly implements the Switch operator with a surrounding
7567 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
7569 iASL: Added a message if a package initializer list is shorter than
7571 length. Adds a new remark for a Package() declaration if an initializer
7573 exists, but is shorter than the declared length of the package. Although
7574 technically legal, this is probably a coding error and it is seen in the
7575 field. ACPICA BZ 815. Lin Ming, Bob Moore.
7577 iASL: Fixed a problem where the compiler could fault after the maximum
7579 of errors was reached (200).
7581 acpixtract: Fixed a possible warning for pointer cast if the compiler
7583 level set very high.
7585 ----------------------------------------
7586 13 October 2009. Summary of changes for version 20091013:
7588 1) ACPI CA Core Subsystem:
7590 Fixed a problem where an Operation Region _REG method could be executed
7592 than once. If a custom address space handler is installed by the host
7594 the "initialize operation regions" phase of the ACPICA initialization,
7596 _REG methods for that address space could be executed twice. This change
7597 fixes the problem. ACPICA BZ 427. Lin Ming.
7599 Fixed a possible memory leak for the Scope() ASL operator. When the exact
7600 invocation of "Scope(\)" is executed (change scope to root), one internal
7601 operand object was leaked. Lin Ming.
7603 Implemented a run-time repair for the _MAT predefined method. If the _MAT
7604 return value is defined as a Field object in the AML, and the field
7605 size is less than or equal to the default width of an integer (32 or
7607 can incorrectly return an Integer instead of a Buffer. ACPICA now
7608 automatically repairs this problem. ACPICA BZ 810.
7610 Implemented a run-time repair for the _BIF and _BIX predefined methods.
7612 "OEM Information" field is often incorrectly returned as an Integer with
7613 value zero if the field is not supported by the platform. This is due to
7615 ambiguity in the ACPI specification. The field should always be a string.
7616 ACPICA now automatically repairs this problem by returning a NULL string
7617 within the returned Package. ACPICA BZ 807.
7619 Example Code and Data Size: These are the sizes for the OS-independent
7620 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7621 debug version of the code includes the debug output trace mechanism and
7623 much larger code and data size.
7626 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
7627 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
7629 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
7630 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
7632 2) iASL Compiler/Disassembler and Tools:
7634 Disassembler: Fixed a problem where references to external symbols that
7635 contained one or more parent-prefixes (carats) were not handled
7637 possibly causing a fault. ACPICA BZ 806. Lin Ming.
7639 Disassembler: Restructured the code so that all functions that handle
7640 external symbols are in a single module. One new file is added,
7643 AML Debugger: Added a max count argument for the Batch command (which
7644 executes multiple predefined methods within the namespace.)
7646 iASL: Updated the compiler documentation (User Reference.) Available at
7647 http://www.acpica.org/documentation/. ACPICA BZ 750.
7649 AcpiXtract: Updated for Lint and other formatting changes. Close all open
7652 ----------------------------------------
7653 03 September 2009. Summary of changes for version 20090903:
7655 1) ACPI CA Core Subsystem:
7657 For Windows Vista compatibility, added the automatic execution of an _INI
7658 method located at the namespace root (\_INI). This method is executed at
7659 table load time. This support is in addition to the automatic execution
7661 \_SB._INI. Lin Ming.
7663 Fixed a possible memory leak in the interpreter for AML package objects
7665 the package initializer list is longer than the defined size of the
7667 This apparently can only happen if the BIOS changes the package size on
7669 fly (seen in a _PSS object), as ASL compilers do not allow this. The
7670 interpreter will truncate the package to the defined size (and issue an
7672 message), but previously could leave the extra objects undeleted if they
7674 pre-created during the argument processing (such is the case if the
7676 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
7678 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
7679 This has been reported in the field. Previously, ACPICA would zero out
7681 buffer/string. Now, the operation is treated as a noop. Provides Windows
7682 compatibility. ACPICA BZ 803. Lin Ming.
7684 Removed an extraneous error message for ASL constructs of the form
7685 Store(LocalX,LocalX) when LocalX is uninitialized. These curious
7687 are seen in many BIOSs and are once again treated as NOOPs and no error
7689 emitted when they are encountered. ACPICA BZ 785.
7691 Fixed an extraneous warning message if a _DSM reserved method returns a
7692 Package object. _DSM can return any type of object, so validation on the
7693 return type cannot be performed. ACPICA BZ 802.
7695 Example Code and Data Size: These are the sizes for the OS-independent
7696 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7697 debug version of the code includes the debug output trace mechanism and
7699 much larger code and data size.
7702 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
7703 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
7705 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
7706 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
7708 2) iASL Compiler/Disassembler and Tools:
7710 iASL: Fixed a problem with the use of the Alias operator and Resource
7711 Templates. The correct alias is now constructed and no error is emitted.
7714 iASL: Implemented the -I option to specify additional search directories
7716 include files. Allows multiple additional search paths for include files.
7717 Directories are searched in the order specified on the command line
7719 the local directory is searched.) ACPICA BZ 800.
7721 iASL: Fixed a problem where the full pathname for include files was not
7722 emitted for warnings/errors. This caused the IDE support to not work
7723 properly. ACPICA BZ 765.
7725 iASL: Implemented the -@ option to specify a Windows-style response file
7726 containing additional command line options. ACPICA BZ 801.
7728 AcpiExec: Added support to load multiple AML files simultaneously (such
7731 DSDT and multiple SSDTs). Also added support for wildcards within the AML
7732 pathname. These features allow all machine tables to be easily loaded and
7733 debugged together. ACPICA BZ 804.
7735 Disassembler: Added missing support for disassembly of HEST table Error
7739 ----------------------------------------
7740 30 July 2009. Summary of changes for version 20090730:
7742 The ACPI 4.0 implementation for ACPICA is complete with this release.
7744 1) ACPI CA Core Subsystem:
7746 ACPI 4.0: Added header file support for all new and changed ACPI tables.
7747 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
7749 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
7751 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
7753 have been some ACPI 4.0 changes to other existing tables. Split the large
7754 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
7756 ACPI 4.0: Implemented predefined name validation for all new names. There
7758 31 new names in ACPI 4.0. The predefined validation module was split into
7760 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
7762 Implemented support for so-called "module-level executable code". This is
7763 executable AML code that exists outside of any control method and is
7765 to be executed at table load time. Although illegal since ACPI 2.0, this
7767 of code still exists and is apparently still being created. Blocks of
7769 code are now detected and executed as intended. Currently, the code
7771 must exist under either an If, Else, or While construct; these are the
7772 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
7774 Implemented an automatic dynamic repair for predefined names that return
7775 nested Package objects. This applies to predefined names that are defined
7777 return a variable-length Package of sub-packages. If the number of sub-
7778 packages is one, BIOS code is occasionally seen that creates a simple
7780 package with no sub-packages. This code attempts to fix the problem by
7781 wrapping a new package object around the existing package. These methods
7783 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
7787 Fixed a regression introduced in 20090625 for the AcpiGetDevices
7789 The _HID/_CID matching was broken and no longer matched IDs correctly.
7793 Fixed a problem with AcpiReset where the reset would silently fail if the
7794 register was one of the protected I/O ports. AcpiReset now bypasses the
7796 validation mechanism. This may eventually be driven into the
7800 Fixed a regression related to the recent update of the AcpiRead/Write
7801 interfaces. A sleep/suspend could fail if the optional PM2 Control
7803 does not exist during an attempt to write the Bus Master Arbitration bit.
7804 (However, some hosts already delete the code that writes this bit, and
7806 code may in fact be obsolete at this date.) ACPICA BZ 799.
7808 Fixed a problem where AcpiTerminate could fault if inadvertently called
7810 in succession. ACPICA BZ 795.
7812 Example Code and Data Size: These are the sizes for the OS-independent
7813 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7814 debug version of the code includes the debug output trace mechanism and
7816 much larger code and data size.
7819 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
7820 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
7822 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
7823 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
7825 2) iASL Compiler/Disassembler and Tools:
7827 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
7828 changes to existing tables. ACPICA BZ 775.
7830 ----------------------------------------
7831 25 June 2009. Summary of changes for version 20090625:
7833 The ACPI 4.0 Specification was released on June 16 and is available at
7834 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
7835 continue for the next few releases.
7837 1) ACPI CA Core Subsystem:
7839 ACPI 4.0: Implemented interpreter support for the IPMI operation region
7840 address space. Includes support for bi-directional data buffers and an
7842 address space handler (to be installed by an IPMI device driver.) ACPICA
7846 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
7848 support in both the header files and the disassembler.
7850 Completed a major update for the AcpiGetObjectInfo external interface.
7852 - Support for variable, unlimited length HID, UID, and CID strings.
7853 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
7855 - Call the _SxW power methods on behalf of a device object.
7856 - Determine if a device is a PCI root bridge.
7857 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
7858 These changes will require an update to all callers of this interface.
7860 the updated ACPICA Programmer Reference for details. One new source file
7862 been added - utilities/utids.c. ACPICA BZ 368, 780.
7864 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
7865 transfers. The Value parameter has been extended from 32 bits to 64 bits
7867 order to support new ACPI 4.0 tables. These changes will require an
7870 all callers of these interfaces. See the ACPICA Programmer Reference for
7871 details. ACPICA BZ 768.
7873 Fixed several problems with AcpiAttachData. The handler was not invoked
7875 the host node was deleted. The data sub-object was not automatically
7877 when the host node was deleted. The interface to the handler had an
7879 parameter, this was removed. ACPICA BZ 778.
7881 Enhanced the function that dumps ACPI table headers. All non-printable
7882 characters in the string fields are now replaced with '?' (Signature,
7884 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
7885 these fields are occasionally seen in the field. ACPICA BZ 788.
7887 Fixed a problem with predefined method repair code where the code that
7888 attempts to repair/convert an object of incorrect type is only executed
7890 the first time the predefined method is called. The mechanism that
7892 warnings on subsequent calls was interfering with the repair mechanism.
7895 Fixed a possible memory leak in the predefined validation/repair code
7898 buffer is automatically converted to an expected string object.
7900 Removed obsolete 16-bit files from the distribution and from the current
7902 tree head. ACPICA BZ 776.
7904 Example Code and Data Size: These are the sizes for the OS-independent
7905 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7906 debug version of the code includes the debug output trace mechanism and
7908 much larger code and data size.
7911 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
7912 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
7914 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
7915 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
7917 2) iASL Compiler/Disassembler and Tools:
7919 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
7920 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
7922 ACPI 4.0: iASL - implemented compile-time validation support for all new
7923 predefined names and control methods (31 total). ACPICA BZ 769.
7925 ----------------------------------------
7926 21 May 2009. Summary of changes for version 20090521:
7928 1) ACPI CA Core Subsystem:
7930 Disabled the preservation of the SCI enable bit in the PM1 control
7932 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
7935 a "preserved" bit - "OSPM always preserves this bit position", section
7936 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
7937 because the bit needs to be explicitly set by the OS as a workaround. No
7938 machines fail if the bit is not preserved. Therefore, ACPICA no longer
7939 attempts to preserve this bit.
7941 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
7942 incorrectly formed _PRT package could cause a fault. Added validation to
7943 ensure that each package element is actually a sub-package.
7945 Implemented a new interface to install or override a single control
7947 AcpiInstallMethod. This interface is useful when debugging in order to
7949 an existing method or to install a missing method without having to
7951 the entire ACPI table. See the ACPICA Programmer Reference for use and
7952 examples. Lin Ming, Bob Moore.
7954 Fixed several reference count issues with the DdbHandle object that is
7955 created from a Load or LoadTable operator. Prevent premature deletion of
7957 object. Also, mark the object as invalid once the table has been
7959 This is needed because the handle itself may not be deleted after the
7961 unload, depending on whether it has been stored in a named object by the
7964 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
7965 mutexes of the same sync level are acquired but then not released in
7967 opposite order, the internally maintained Current Sync Level becomes
7969 and can cause subsequent execution errors. ACPICA BZ 471.
7971 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
7972 specification has been changed to make the SyncLevel for mutex objects
7974 useful. When releasing a mutex, the SyncLevel of the mutex must now be
7976 same as the current sync level. This makes more sense than the previous
7978 (SyncLevel less than or equal). This change updates the code to match the
7981 Fixed a problem with the local version of the AcpiOsPurgeCache function.
7983 (local) cache must be locked during all cache object deletions. Andrew
7986 Updated the Load operator to use operation region interfaces. This
7988 direct memory mapping with region access calls. Now, all region accesses
7990 through the installed region handler as they should.
7992 Simplified and optimized the NsGetNextNode function. Reduced parameter
7994 and reduced code for this frequently used function.
7996 Example Code and Data Size: These are the sizes for the OS-independent
7997 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7998 debug version of the code includes the debug output trace mechanism and
8000 much larger code and data size.
8003 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
8004 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
8006 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
8007 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
8009 2) iASL Compiler/Disassembler and Tools:
8011 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
8013 with sub-table disassembly and handling invalid sub-tables. Attempt
8015 after an invalid sub-table ID.
8017 ----------------------------------------
8018 22 April 2009. Summary of changes for version 20090422:
8020 1) ACPI CA Core Subsystem:
8022 Fixed a compatibility issue with the recently released I/O port
8024 mechanism. For windows compatibility, 1) On a port protection violation,
8025 simply ignore the request and do not return an exception (allow the
8027 method to continue execution.) 2) If only part of the request overlaps a
8028 protected port, read/write the individual ports that are not protected.
8032 Enhanced the execution of the ASL/AML BreakPoint operator so that it
8034 breaks into the AML debugger if the debugger is present. This matches the
8035 ACPI-defined behavior.
8037 Fixed several possible warnings related to the use of the configurable
8038 ACPI_THREAD_ID. This type can now be configured as either an integer or a
8039 pointer with no warnings. Also fixes several warnings in printf-like
8040 statements for the 64-bit build when the type is configured as a pointer.
8043 Fixed a number of possible warnings when compiling with gcc 4+ (depending
8045 warning options.) Examples include printf formats, aliasing, unused
8047 missing prototypes, missing switch default statements, use of non-ANSI
8048 library functions, use of non-ANSI constructs. See generate/unix/Makefile
8050 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
8052 Example Code and Data Size: These are the sizes for the OS-independent
8053 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8054 debug version of the code includes the debug output trace mechanism and
8056 much larger code and data size.
8059 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
8060 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
8062 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
8063 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
8065 2) iASL Compiler/Disassembler and Tools:
8067 iASL: Fixed a generation warning from Bison 2.3 and fixed several
8072 iASL: Fixed a problem where the Unix/Linux versions of the compiler could
8074 correctly digest Windows/DOS formatted files (with CR/LF).
8076 iASL: Added a new option for "quiet mode" (-va) that produces only the
8077 compilation summary, not individual errors and warnings. Useful for large
8080 AcpiExec: Implemented a new option (-z) to enable a forced
8082 timeout that can be used to detect hang conditions during execution of
8084 code (includes both internal semaphores and AML-defined mutexes and
8087 Added new makefiles for the generation of acpica in a generic unix-like
8088 environment. These makefiles are intended to generate the acpica tools
8090 utilities from the original acpica git source tree structure.
8092 Test Suites: Updated and cleaned up the documentation files. Updated the
8093 copyrights to 2009, affecting all source files. Use the new version of
8095 with quiet mode. Increased the number of available semaphores in the
8097 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
8099 an alternate implementation of the semaphore timeout to allow aslts to
8100 execute fully on Cygwin.
8102 ----------------------------------------
8103 20 March 2009. Summary of changes for version 20090320:
8105 1) ACPI CA Core Subsystem:
8107 Fixed a possible race condition between AcpiWalkNamespace and dynamic
8109 unloads. Added a reader/writer locking mechanism to allow multiple
8111 namespace walks (readers), but block a dynamic table unload until it can
8113 exclusive write access to the namespace. This fixes a problem where a
8115 unload could (possibly catastrophically) delete the portion of the
8117 that is currently being examined by a walk. Adds a new file, utlock.c,
8119 implements the reader/writer lock mechanism. ACPICA BZ 749.
8121 Fixed a regression introduced in version 20090220 where a change to the
8123 handling could cause the ACPICA subsystem to access non-existent I/O
8126 Modified the handling of FADT register and table (FACS/DSDT) addresses.
8128 FADT can contain both 32-bit and 64-bit versions of these addresses.
8129 Previously, the 64-bit versions were favored, meaning that if both 32 and
8131 versions were valid, but not equal, the 64-bit version was used. This was
8132 found to cause some machines to fail. Now, in this case, the 32-bit
8134 is used instead. This now matches the Windows behavior.
8136 Implemented a new mechanism to protect certain I/O ports. Provides
8138 compatibility and protects the standard PC I/O ports from access via AML
8139 code. Adds a new file, hwvalid.c
8141 Fixed a possible extraneous warning message from the FADT support. The
8142 message warns of a 32/64 length mismatch between the legacy and GAS
8143 definitions for a register.
8145 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
8147 made obsolete by the port protection mechanism above. It was previously
8149 to validate the entire address range of an operation region, which could
8151 incorrect if the range included illegal ports, but fields within the
8152 operation region did not actually access those ports. Validation is now
8153 performed on a per-field basis instead of the entire region.
8155 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
8156 Ignored bits must be "preserved" according to the ACPI spec. Usually,
8158 means a read/modify/write when writing to the register. However, for
8160 registers, writing a one means clear the event. Writing a zero means
8162 the event (do not clear.) This behavior is clarified in the ACPI 4.0
8164 and the ACPICA code now simply always writes a zero to the ignored bit.
8166 Modified the handling of ignored bits for the PM1 A/B Control Registers.
8168 per the ACPI specification, for the control registers, preserve
8169 (read/modify/write) all bits that are defined as either reserved or
8172 Updated the handling of write-only bits in the PM1 A/B Control Registers.
8173 When reading the register, zero the write-only bits as per the ACPI spec.
8174 ACPICA BZ 443. Lin Ming.
8176 Removed "Linux" from the list of supported _OSI strings. Linux no longer
8177 wants to reply true to this request. The Windows strings are the only
8179 through the AML that are tested and known to work properly.
8182 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
8183 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
8185 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
8186 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
8188 2) iASL Compiler/Disassembler and Tools:
8190 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
8194 ----------------------------------------
8195 20 February 2009. Summary of changes for version 20090220:
8197 1) ACPI CA Core Subsystem:
8199 Optimized the ACPI register locking. Removed locking for reads from the
8201 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
8203 not required when reading the single-bit registers. The
8204 AcpiGetRegisterUnlocked function is no longer needed and has been
8206 This will improve performance for reads on these registers. ACPICA BZ
8209 Fixed the parameter validation for AcpiRead/Write. Now return
8210 AE_BAD_PARAMETER if the input register pointer is null, and
8213 the register has an address of zero. Previously, these cases simply
8215 AE_OK. For optional registers such as PM1B status/enable/control, the
8217 should check for a valid register address before calling. ACPICA BZ 748.
8219 Renamed the external ACPI bit register access functions. Renamed
8220 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
8221 functions. The new names are AcpiReadBitRegister and
8222 AcpiWriteBitRegister.
8223 Also, restructured the code for these functions by simplifying the code
8225 and condensing duplicate code to reduce code size.
8227 Added new functions to transparently handle the possibly split PM1 A/B
8228 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
8230 now handle the split registers for PM1 Status, Enable, and Control.
8235 Added a function to handle the PM1 control registers,
8236 AcpiHwWritePm1Control.
8237 This function writes both of the PM1 control registers (A/B). These
8239 are different than the PM1 A/B status and enable registers in that
8241 values can be written to the A/B registers. Most notably, the SLP_TYP
8243 can be different, as per the values returned from the _Sx predefined
8246 Removed an extra register write within AcpiHwClearAcpiStatus. This
8248 was writing an optional PM1B status register twice. The existing call to
8250 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
8252 register. ACPICA BZ 751.
8254 Split out the PM1 Status registers from the FADT. Added new globals for
8256 registers (A/B), similar to the way the PM1 Enable registers are handled.
8257 Instead of overloading the FADT Event Register blocks. This makes the
8259 clearer and less prone to error.
8261 Fixed the warning message for when the platform contains too many ACPI
8263 for the default size of the global root table data structure. The
8265 for the truncation value was incorrect.
8267 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
8268 obsolete macro, since it is now a simple reference to ->common.type.
8270 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
8272 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
8273 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
8274 simply SLEEP_TYPE. ACPICA BZ 754.
8276 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
8277 function is only needed on 64-bit host operating systems and is thus not
8278 included for 32-bit hosts.
8280 Debug output: print the input and result for invocations of the _OSI
8282 control method via the ACPI_LV_INFO debug level. Also, reduced some of
8284 verbosity of this debug level. Len Brown.
8286 Example Code and Data Size: These are the sizes for the OS-independent
8287 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8288 debug version of the code includes the debug output trace mechanism and
8290 much larger code and data size.
8293 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
8294 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
8296 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
8297 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
8299 2) iASL Compiler/Disassembler and Tools:
8301 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
8302 various legal performance profiles.
8304 ----------------------------------------
8305 23 January 2009. Summary of changes for version 20090123:
8307 1) ACPI CA Core Subsystem:
8309 Added the 2009 copyright to all module headers and signons. This affects
8310 virtually every file in the ACPICA core subsystem, the iASL compiler, and
8311 the tools/utilities.
8313 Implemented a change to allow the host to override any ACPI table,
8315 dynamically loaded tables. Previously, only the DSDT could be replaced by
8317 host. With this change, the AcpiOsTableOverride interface is called for
8319 table found in the RSDT/XSDT during ACPICA initialization, and also
8321 a table is dynamically loaded via the AML Load operator.
8323 Updated FADT flag definitions, especially the Boot Architecture flags.
8325 Debugger: For the Find command, automatically pad the input ACPI name
8327 underscores if the name is shorter than 4 characters. This enables a
8329 with the actual namespace entry which is itself padded with underscores.
8331 Example Code and Data Size: These are the sizes for the OS-independent
8332 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8333 debug version of the code includes the debug output trace mechanism and
8335 much larger code and data size.
8338 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
8339 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
8341 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
8342 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
8344 2) iASL Compiler/Disassembler and Tools:
8346 Fix build error under Bison-2.4.
8348 Dissasembler: Enhanced FADT support. Added decoding of the Boot
8350 flags. Now decode all flags, regardless of the FADT version. Flag output
8351 includes the FADT version which first defined each flag.
8353 The iASL -g option now dumps the RSDT to a file (in addition to the FADT
8355 DSDT). Windows only.
8357 ----------------------------------------
8358 04 December 2008. Summary of changes for version 20081204:
8360 1) ACPI CA Core Subsystem:
8362 The ACPICA Programmer Reference has been completely updated and revamped
8364 this release. This includes updates to the external interfaces, OSL
8365 interfaces, the overview sections, and the debugger reference.
8367 Several new ACPICA interfaces have been implemented and documented in the
8368 programmer reference:
8369 AcpiReset - Writes the reset value to the FADT-defined reset register.
8370 AcpiDisableAllGpes - Disable all available GPEs.
8371 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
8372 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
8373 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
8374 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
8375 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
8377 Most of the public ACPI hardware-related interfaces have been moved to a
8379 file, components/hardware/hwxface.c
8381 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
8382 register lengths within the FADT are now used, and the low level ACPI
8383 register access no longer hardcodes the ACPI register lengths. Given that
8384 there may be some risk in actually trusting the FADT register lengths, a
8386 time option was added to fall back to the default hardcoded lengths if
8388 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
8389 option is set to true for now, and a warning is issued if a suspicious
8391 register length is overridden with the default value.
8393 Fixed a reference count issue in NsRepairObject. This problem was
8395 in version 20081031 as part of a fix to repair Buffer objects within
8398 Added semaphore support to the Linux/Unix application OS-services layer
8399 (OSL). ACPICA BZ 448. Lin Ming.
8401 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
8403 be implemented in the OSL, or will binary semaphores be used instead.
8405 Example Code and Data Size: These are the sizes for the OS-independent
8406 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8407 debug version of the code includes the debug output trace mechanism and
8409 much larger code and data size.
8412 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
8413 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
8415 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
8416 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
8418 2) iASL Compiler/Disassembler and Tools:
8420 iASL: Completed the '-e' option to include additional ACPI tables in
8423 aid with disassembly and External statement generation. ACPICA BZ 742.
8427 iASL: Removed the "named object in while loop" error. The compiler cannot
8428 determine how many times a loop will execute. ACPICA BZ 730.
8430 Disassembler: Implemented support for FADT revision 2 (MS extension).
8434 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
8437 ----------------------------------------
8438 31 October 2008. Summary of changes for version 20081031:
8440 1) ACPI CA Core Subsystem:
8442 Restructured the ACPICA header files into public/private. acpi.h now
8444 only the "public" acpica headers. All other acpica headers are "private"
8446 should not be included by acpica users. One new file, accommon.h is used
8448 include the commonly used private headers for acpica code generation.
8450 plans include moving all private headers to a new subdirectory.
8452 Implemented an automatic Buffer->String return value conversion for
8453 predefined ACPI methods. For these methods (such as _BIF), added
8455 conversion for return objects that are required to be a String, but a
8457 was found instead. This can happen when reading string battery data from
8459 operation region, because it used to be difficult to convert the data
8461 buffer to string from within the ASL. Ensures that the host OS is
8463 with a valid null-terminated string. Linux BZ 11822.
8465 Updated the FACS waking vector interfaces. Split
8466 AcpiSetFirmwareWakingVector
8467 into two: one for the 32-bit vector, another for the 64-bit vector. This
8469 required because the host OS must setup the wake much differently for
8471 vector (real vs. protected mode, etc.) and the interface itself should
8474 deciding which vector to use. Also, eliminated the
8475 GetFirmwareWakingVector
8476 interface, as it served no purpose (only the firmware reads the vector,
8478 only writes the vector.) ACPICA BZ 731.
8480 Implemented a mechanism to escape infinite AML While() loops. Added a
8482 counter to force exit from AML While loops if the count becomes too
8484 This can occur in poorly written AML when the hardware does not respond
8485 within a while loop and the loop does not implement a timeout. The
8487 loop count is configurable. A new exception code is returned when a loop
8489 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
8491 Optimized the execution of AML While loops. Previously, a control state
8492 object was allocated and freed for each execution of the loop. The
8493 optimization is to simply reuse the control state for each iteration.
8495 speeds up the raw loop execution time by about 5%.
8497 Enhanced the implicit return mechanism. For Windows compatibility, return
8499 implicit integer of value zero for methods that contain no executable
8501 Such methods are seen in the field as stubs (presumably), and can cause
8502 drivers to fail if they expect a return value. Lin Ming.
8504 Allow multiple backslashes as root prefixes in namepaths. In a fully
8505 qualified namepath, allow multiple backslash prefixes. This can happen
8507 is seen in the field) because of the use of a double-backslash in strings
8508 (since backslash is the escape character) causing confusion. ACPICA BZ
8512 Emit a warning if two different FACS or DSDT tables are discovered in the
8513 FADT. Checks if there are two valid but different addresses for the FACS
8515 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
8517 Consolidated the method argument count validation code. Merged the code
8519 validates control method argument counts into the predefined validation
8520 module. Eliminates possible multiple warnings for incorrect argument
8523 Implemented ACPICA example code. Includes code for ACPICA initialization,
8524 handler installation, and calling a control method. Available at
8525 source/tools/examples.
8527 Added a global pointer for FACS table to simplify internal FACS access.
8529 the global pointer instead of using AcpiGetTableByIndex for each FACS
8531 This simplifies the code for the Global Lock and the Firmware Waking
8534 Example Code and Data Size: These are the sizes for the OS-independent
8535 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8536 debug version of the code includes the debug output trace mechanism and
8538 much larger code and data size.
8541 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
8542 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
8544 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
8545 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
8547 2) iASL Compiler/Disassembler and Tools:
8549 iASL: Improved disassembly of external method calls. Added the -e option
8551 allow the inclusion of additional ACPI tables to help with the
8554 method invocations and the generation of external declarations during the
8555 disassembly. Certain external method invocations cannot be disassembled
8556 properly without the actual declaration of the method. Use the -e option
8558 include the table where the external method(s) are actually declared.
8560 useful for disassembling SSDTs that make method calls back to the master
8561 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl
8563 -e dsdt.aml ssdt1.aml
8565 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
8566 problem where the use of an alias within a namepath would result in a not
8567 found error or cause the compiler to fault. Also now allows forward
8568 references from the Alias operator itself. ACPICA BZ 738.
8570 ----------------------------------------
8571 26 September 2008. Summary of changes for version 20080926:
8573 1) ACPI CA Core Subsystem:
8575 Designed and implemented a mechanism to validate predefined ACPI methods
8577 objects. This code validates the predefined ACPI objects (objects whose
8579 start with underscore) that appear in the namespace, at the time they are
8580 evaluated. The argument count and the type of the returned object are
8581 validated against the ACPI specification. The purpose of this validation
8583 to detect problems with the BIOS-implemented predefined ACPI objects
8585 the results are returned to the ACPI-related drivers. Future enhancements
8587 include actual repair of incorrect return objects where possible. Two new
8588 files are nspredef.c and acpredef.h.
8590 Fixed a fault in the AML parser if a memory allocation fails during the
8592 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
8594 Fixed an issue with implicit return compatibility. This change improves
8596 implicit return mechanism to be more compatible with the MS interpreter.
8598 Ming, ACPICA BZ 349.
8600 Implemented support for zero-length buffer-to-string conversions. Allow
8602 length strings during interpreter buffer-to-string conversions. For
8604 during the ToDecimalString and ToHexString operators, as well as implicit
8605 conversions. Fiodor Suietov, ACPICA BZ 585.
8607 Fixed two possible memory leaks in the error exit paths of
8608 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
8610 similar in that they use a stack of state objects in order to eliminate
8611 recursion. The stack must be fully unwound and deallocated if an error
8612 occurs. Lin Ming. ACPICA BZ 383.
8614 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
8616 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
8617 Moore ACPICA BZ 442.
8619 Removed the obsolete version number in module headers. Removed the
8620 "$Revision" number that appeared in each module header. This version
8622 was useful under SourceSafe and CVS, but has no meaning under git. It is
8624 only incorrect, it could also be misleading.
8626 Example Code and Data Size: These are the sizes for the OS-independent
8627 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8628 debug version of the code includes the debug output trace mechanism and
8630 much larger code and data size.
8633 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8634 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
8636 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
8637 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
8639 ----------------------------------------
8640 29 August 2008. Summary of changes for version 20080829:
8642 1) ACPI CA Core Subsystem:
8644 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
8645 Reference. Changes include the elimination of cheating on the Object
8647 for the DdbHandle subtype, addition of a reference class field to
8648 differentiate the various reference types (instead of an AML opcode), and
8650 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
8652 Reduce an error to a warning for an incorrect method argument count.
8653 Previously aborted with an error if too few arguments were passed to a
8654 control method via the external ACPICA interface. Now issue a warning
8656 and continue. Handles the case where the method inadvertently declares
8658 many arguments, but does not actually use the extra ones. Applies mainly
8660 the predefined methods. Lin Ming. Linux BZ 11032.
8662 Disallow the evaluation of named object types with no intrinsic value.
8664 AE_TYPE for objects that have no value and therefore evaluation is
8666 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
8668 these types were allowed, but an exception would be generated at some
8670 during the evaluation. Now, the error is generated up front.
8672 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
8673 (nsnames.c). Fixes a leak in the error exit path.
8675 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
8677 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
8679 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
8682 Removed obsolete and/or unused exception codes from the acexcep.h header.
8683 There is the possibility that certain device drivers may be affected if
8685 use any of these exceptions.
8687 The ACPICA documentation has been added to the public git source tree,
8689 acpica/documents. Included are the ACPICA programmer reference, the iASL
8690 compiler reference, and the changes.txt release logfile.
8692 Example Code and Data Size: These are the sizes for the OS-independent
8693 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8694 debug version of the code includes the debug output trace mechanism and
8696 much larger code and data size.
8699 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8700 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
8702 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8703 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
8705 2) iASL Compiler/Disassembler and Tools:
8707 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
8708 defines _SCP with 3 arguments. Previous versions defined it with only 1
8709 argument. iASL now allows both definitions.
8711 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
8713 length subtables when disassembling ACPI tables. Also fixed a couple of
8714 errors where a full 16-bit table type field was not extracted from the
8718 acpisrc: Improve comment counting mechanism for generating source code
8719 statistics. Count first and last lines of multi-line comments as
8721 not comment lines. Handle Linux legal header in addition to standard
8725 ----------------------------------------
8727 29 July 2008. Summary of changes for version 20080729:
8729 1) ACPI CA Core Subsystem:
8731 Fix a possible deadlock in the GPE dispatch. Remove call to
8732 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
8734 to acquire the GPE lock but can deadlock since the GPE lock is already
8736 at dispatch time. This code was introduced in version 20060831 as a
8738 to Linux BZ 6881 and has since been removed from Linux.
8740 Add a function to dereference returned reference objects. Examines the
8742 object from a call to AcpiEvaluateObject. Any Index or RefOf references
8744 automatically dereferenced in an attempt to return something useful
8746 reference types cannot be converted into an external ACPI_OBJECT.)
8748 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
8750 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
8751 subtables for the MADT and one new subtable for the SRAT. Includes
8752 disassembler and AcpiSrc support. Data from the Intel 64 Architecture
8754 Specification, June 2008.
8756 Additional error checking for pathname utilities. Add error check after
8758 calls to AcpiNsGetPathnameLength. Add status return from
8759 AcpiNsBuildExternalPath and check after all calls. Add parameter
8761 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
8763 Return status from the global init function AcpiUtGlobalInitialize. This
8765 used by both the kernel subsystem and the utilities such as iASL
8767 The function could possibly fail when the caches are initialized. Yang
8770 Add a function to decode reference object types to strings. Created for
8771 improved error messages.
8773 Improve object conversion error messages. Better error messages during
8775 conversion from internal to the external ACPI_OBJECT. Used for external
8777 to AcpiEvaluateObject.
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: 79.6K Code, 16.2K Data, 95.8K Total
8787 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
8789 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
8790 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
8792 2) iASL Compiler/Disassembler and Tools:
8794 Debugger: fix a possible hang when evaluating non-methods. Fixes a
8796 introduced in version 20080701. If the object being evaluated (via
8798 command) is not a method, the debugger can hang while trying to obtain
8800 existent parameters.
8802 iASL: relax error for using reserved "_T_x" identifiers. These names can
8803 appear in a disassembled ASL file if they were emitted by the original
8804 compiler. Instead of issuing an error or warning and forcing the user to
8805 manually change these names, issue a remark instead.
8807 iASL: error if named object created in while loop. Emit an error if any
8809 object is created within a While loop. If allowed, this code will
8812 run-time error on the second iteration of the loop when an attempt is
8815 create the same named object twice. ACPICA bugzilla 730.
8817 iASL: Support absolute pathnames for include files. Add support for
8819 pathnames within the Include operator. previously, only relative
8823 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
8825 The ACPI spec requires one interrupt minimum. BZ 423
8827 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
8828 Handles the case for the Interrupt Resource Descriptor where
8829 the ResourceSource argument is omitted but ResourceSourceIndex
8830 is present. Now leave room for the Index. BZ 426
8832 iASL: Prevent error message if CondRefOf target does not exist. Fixes
8834 where an error message is emitted if the target does not exist. BZ 516
8836 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
8837 (get ACPI tables on Windows). This was apparently broken in version
8840 AcpiXtract: Handle EOF while extracting data. Correctly handle the case
8842 the EOF happens immediately after the last table in the input file. Print
8843 completion message. Previously, no message was displayed in this case.
8845 ----------------------------------------
8846 01 July 2008. Summary of changes for version 20080701:
8848 0) Git source tree / acpica.org
8850 Fixed a problem where a git-clone from http would not transfer the entire
8853 1) ACPI CA Core Subsystem:
8855 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
8856 enable bit. Now performs a read-change-write of the enable register
8858 of simply writing out the cached enable mask. This will prevent
8860 enabling of GPEs if a rogue GPE is received during initialization (before
8862 handlers are installed.)
8864 Implemented a copy for dynamically loaded tables. Previously, dynamically
8865 loaded tables were simply mapped - but on some machines this memory is
8866 corrupted after suspend. Now copy the table to a local buffer. For the
8867 OpRegion case, added checksum verify. Use the table length from the table
8868 header, not the region length. For the Buffer case, use the table length
8869 also. Dennis Noordsij, Bob Moore. BZ 10734
8871 Fixed a problem where the same ACPI table could not be dynamically loaded
8873 unloaded more than once. Without this change, a table cannot be loaded
8875 once it has been loaded/unloaded one time. The current mechanism does not
8876 unregister a table upon an unload. During a load, if the same table is
8878 this no longer returns an exception. BZ 722
8880 Fixed a problem where the wrong descriptor length was calculated for the
8881 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
8883 are calculated as 12 bytes long, but the actual length in the internal
8884 descriptor is 16 because of the round-up to 8 on the 64-bit build.
8886 by Linn Crosetto. BZ 728
8888 Fixed a possible memory leak in the Unload operator. The DdbHandle
8890 by Load() did not have its reference count decremented during unload,
8892 to a memory leak. Lin Ming. BZ 727
8894 Fixed a possible memory leak when deleting thermal/processor objects. Any
8895 associated notify handlers (and objects) were not being deleted. Fiodor
8898 Fixed the ordering of the ASCII names in the global mutex table to match
8900 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
8902 Vegard Nossum. BZ 726
8904 Enhanced the AcpiGetObjectInfo interface to return the number of required
8905 arguments if the object is a control method. Added this call to the
8907 so the proper number of default arguments are passed to a method. This
8908 prevents a warning when executing methods from AcpiExec.
8910 Added a check for an invalid handle in AcpiGetObjectInfo. Return
8911 AE_BAD_PARAMETER if input handle is invalid. BZ 474
8913 Fixed an extraneous warning from exconfig.c on the 64-bit build.
8915 Example Code and Data Size: These are the sizes for the OS-independent
8916 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8917 debug version of the code includes the debug output trace mechanism and
8919 much larger code and data size.
8922 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
8923 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
8925 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
8926 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
8928 2) iASL Compiler/Disassembler and Tools:
8930 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
8931 resource descriptor names.
8933 iASL: Detect invalid ASCII characters in input (windows version). Removed
8935 "-CF" flag from the flex compile, enables correct detection of non-ASCII
8936 characters in the input. BZ 441
8938 iASL: Eliminate warning when result of LoadTable is not used. Eliminate
8940 "result of operation not used" warning when the DDB handle returned from
8941 LoadTable is not used. The warning is not needed. BZ 590
8943 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
8946 pass address of table to the AML. Added option to disable OpRegion
8948 to allow creation of an OpRegion with a real address that was passed to
8950 All of this allows testing of the Load and Unload operators from
8953 Debugger: update tables command for unloaded tables. Handle unloaded
8955 and use the standard table header output routine.
8957 ----------------------------------------
8958 09 June 2008. Summary of changes for version 20080609:
8960 1) ACPI CA Core Subsystem:
8962 Implemented a workaround for reversed _PRT entries. A significant number
8964 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
8965 change dynamically detects and repairs this problem. Provides
8967 with MS ACPI. BZ 6859
8969 Simplified the internal ACPI hardware interfaces to eliminate the locking
8970 flag parameter from Register Read/Write. Added a new external interface,
8971 AcpiGetRegisterUnlocked.
8973 Fixed a problem where the invocation of a GPE control method could hang.
8975 was a regression introduced in 20080514. The new method argument count
8976 validation mechanism can enter an infinite loop when a GPE method is
8977 dispatched. Problem fixed by removing the obsolete code that passed GPE
8979 information to the notify handler via the control method parameter
8982 Fixed a problem where the _SST execution status was incorrectly returned
8984 the caller of AcpiEnterSleepStatePrep. This was a regression introduced
8986 20080514. _SST is optional and a NOT_FOUND exception should never be
8989 Fixed a problem where a deleted object could be accessed from within the
8991 parser. This was a regression introduced in version 20080123 as a fix for
8993 Unload operator. Lin Ming. BZ 10669
8995 Cleaned up the debug operand dump mechanism. Eliminated unnecessary
8997 and eliminated the use of a negative index in a loop. Operands are now
8998 displayed in the correct order, not backwards. This also fixes a
9000 introduced in 20080514 on 64-bit systems where the elimination of
9001 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
9004 Fixed a possible memory leak in EvPciConfigRegionSetup where the error
9006 path did not delete a locally allocated structure.
9008 Updated definitions for the DMAR and SRAT tables to synchronize with the
9009 current specifications. Includes disassembler support.
9011 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
9012 loop termination value was used. Loop terminated on iteration early,
9014 one mutex. Linn Crosetto
9016 Example Code and Data Size: These are the sizes for the OS-independent
9017 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9018 debug version of the code includes the debug output trace mechanism and
9020 much larger code and data size.
9023 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
9024 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
9026 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
9027 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
9029 2) iASL Compiler/Disassembler and Tools:
9031 Disassembler: Implemented support for EisaId() within _CID objects. Now
9032 disassemble integer _CID objects back to EisaId invocations, including
9033 multiple integers within _CID packages. Includes single-step support for
9036 Disassembler: Added support for DMAR and SRAT table definition changes.
9038 ----------------------------------------
9039 14 May 2008. Summary of changes for version 20080514:
9041 1) ACPI CA Core Subsystem:
9043 Fixed a problem where GPEs were enabled too early during the ACPICA
9044 initialization. This could lead to "handler not installed" errors on some
9045 machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
9047 ensures that all operation regions and devices throughout the namespace
9049 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
9051 Implemented a change to the enter sleep code. Moved execution of the _GTS
9052 method to just before setting sleep enable bit. The execution was moved
9054 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
9055 immediately before the SLP_EN bit is set, as per the ACPI specification.
9058 Implemented a fix to disable unknown GPEs (2nd version). Now always
9060 the GPE, even if ACPICA thinks that that it is already disabled. It is
9061 possible that the AML or some other code has enabled the GPE unbeknownst
9065 Fixed a problem with the Field operator where zero-length fields would
9067 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
9069 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
9071 Implemented a fix for the Load operator, now load the table at the
9073 root. This reverts a change introduced in version 20071019. The table is
9075 loaded at the namespace root even though this goes against the ACPI
9076 specification. This provides compatibility with other ACPI
9078 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
9081 Fixed a problem where ACPICA would not Load() tables with unusual
9083 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
9084 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
9085 Therefore, signature validation is worthless. Apparently MS ACPI accepts
9087 signatures, ACPICA must be compatible. BZ 10454.
9089 Fixed a possible negative array index in AcpiUtValidateException. Added
9091 fields to the exception string arrays to eliminate a -1 subtraction on
9095 Updated the debug tracking macros to reduce overall code and data size.
9096 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
9097 instead of pointers to static strings. Jan Beulich and Bob Moore.
9099 Implemented argument count checking in control method invocation via
9100 AcpiEvaluateObject. Now emit an error if too few arguments, warning if
9102 many. This applies only to extern programmatic control method execution,
9104 method-to-method calls within the AML. Lin Ming.
9106 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
9108 longer needed, especially with the removal of 16-bit support. It was
9110 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
9113 32/64-bit platforms is required.
9115 Added the C const qualifier for appropriate string constants -- mostly
9116 MODULE_NAME and printf format strings. Jan Beulich.
9118 Example Code and Data Size: These are the sizes for the OS-independent
9119 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9120 debug version of the code includes the debug output trace mechanism and
9122 much larger code and data size.
9125 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
9126 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
9128 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
9129 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
9131 2) iASL Compiler/Disassembler and Tools:
9133 Implemented ACPI table revision ID validation in the disassembler. Zero
9135 always invalid. For DSDTs, the ID controls the interpreter integer width.
9137 means 32-bit and this is unusual. 2 or greater is 64-bit.
9139 ----------------------------------------
9140 21 March 2008. Summary of changes for version 20080321:
9142 1) ACPI CA Core Subsystem:
9144 Implemented an additional change to the GPE support in order to suppress
9145 spurious or stray GPEs. The AcpiEvDisableGpe function will now
9147 disable incoming GPEs that are neither enabled nor disabled -- meaning
9149 the GPE is unknown to the system. This should prevent future interrupt
9151 from that GPE. BZ 6217 (Zhang Rui)
9153 Fixed a problem where NULL package elements were not returned to the
9154 AcpiEvaluateObject interface correctly. The element was simply ignored
9155 instead of returning a NULL ACPI_OBJECT package element, potentially
9157 a buffer overflow and/or confusing the caller who expected a fixed number
9159 elements. BZ 10132 (Lin Ming, Bob Moore)
9161 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
9163 Qword), Field, BankField, and IndexField operators when invoked from
9165 an executing control method. In this case, these operators created
9167 nodes that were incorrectly left marked as permanent nodes instead of
9168 temporary nodes. This could cause a problem if there is race condition
9169 between an exiting control method and a running namespace walk. (Reported
9173 Fixed a problem where the CreateField and CreateXXXField operators would
9174 incorrectly allow duplicate names (the name of the field) with no
9178 Implemented several changes for Notify handling. Added support for new
9180 values (ACPI 2.0+) and improved the Notify debug output. Notify on
9181 PowerResource objects is no longer allowed, as per the ACPI
9183 (Bob Moore, Zhang Rui)
9185 All Reference Objects returned via the AcpiEvaluateObject interface are
9187 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
9189 NULL objects - either NULL package elements or unresolved named
9192 Fixed a problem where an extraneous debug message was produced for
9194 objects (when debugging enabled). The message "Package List length larger
9195 than NumElements count" is now produced in the correct case, and is now
9197 error message rather than a debug message. Added a debug message for the
9198 opposite case, where NumElements is larger than the Package List (the
9200 will be padded out with NULL elements as per the ACPI spec.)
9202 Implemented several improvements for the output of the ASL "Debug" object
9204 clarify and keep all data for a given object on one output line.
9206 Fixed two size calculation issues with the variable-length Start
9208 resource descriptor.
9210 Example Code and Data Size: These are the sizes for the OS-independent
9211 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9212 debug version of the code includes the debug output trace mechanism and
9214 a much larger code and data size.
9217 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
9218 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
9220 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
9221 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
9223 2) iASL Compiler/Disassembler and Tools:
9225 Fixed a problem with the use of the Switch operator where execution of
9227 containing method by multiple concurrent threads could cause an
9228 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
9229 actual Switch opcode, it must be simulated with local named temporary
9230 variables and if/else pairs. The solution chosen was to mark any method
9232 uses Switch as Serialized, thus preventing multiple thread entries. BZ
9235 ----------------------------------------
9236 13 February 2008. Summary of changes for version 20080213:
9238 1) ACPI CA Core Subsystem:
9240 Implemented another MS compatibility design change for GPE/Notify
9242 GPEs are now cleared/enabled asynchronously to allow all pending notifies
9244 complete first. It is expected that the OSL will queue the enable request
9245 behind all pending notify requests (may require changes to the local host
9247 in AcpiOsExecute). Alexey Starikovskiy.
9249 Fixed a problem where buffer and package objects passed as arguments to a
9250 control method via the external AcpiEvaluateObject interface could cause
9252 AE_AML_INTERNAL exception depending on the order and type of operators
9253 executed by the target control method.
9255 Fixed a problem where resource descriptor size optimization could cause a
9256 problem when a _CRS resource template is passed to a _SRS method. The
9258 resource template must use the same descriptors (with the same size) as
9259 returned from _CRS. This change affects the following resource
9261 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
9264 Fixed a problem where a CopyObject to RegionField, BankField, and
9266 objects did not perform an implicit conversion as it should. These types
9268 retain their initial type permanently as per the ACPI specification.
9270 a CopyObject to all other object types should not perform an implicit
9271 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
9273 Fixed a problem with the AcpiGetDevices interface where the mechanism to
9274 match device CIDs did not examine the entire list of available CIDs, but
9275 instead aborted on the first non-matching CID. Andrew Patterson.
9277 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
9279 inadvertently changed to return a 16-bit value instead of a 32-bit value,
9280 truncating the upper dword of a 64-bit value. This macro is only used to
9281 display debug output, so no incorrect calculations were made. Also,
9282 reimplemented the macro so that a 64-bit shift is not performed by
9283 inefficient compilers.
9285 Added missing va_end statements that should correspond with each va_start
9288 Example Code and Data Size: These are the sizes for the OS-independent
9289 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9290 debug version of the code includes the debug output trace mechanism and
9292 a much larger code and data size.
9295 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
9296 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
9298 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
9299 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
9301 2) iASL Compiler/Disassembler and Tools:
9303 Implemented full disassembler support for the following new ACPI tables:
9304 BERT, EINJ, and ERST. Implemented partial disassembler support for the
9305 complicated HEST table. These tables support the Windows Hardware Error
9306 Architecture (WHEA).
9308 ----------------------------------------
9309 23 January 2008. Summary of changes for version 20080123:
9311 1) ACPI CA Core Subsystem:
9313 Added the 2008 copyright to all module headers and signons. This affects
9314 virtually every file in the ACPICA core subsystem, the iASL compiler, and
9315 the tools/utilities.
9317 Fixed a problem with the SizeOf operator when used with Package and
9319 objects. These objects have deferred execution for some arguments, and
9321 execution is now completed before the SizeOf is executed. This problem
9323 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
9327 Implemented an enhancement to the interpreter "slack mode". In the
9330 an explicit return or an implicitly returned object from the last
9332 opcode, a control method will now implicitly return an integer of value 0
9334 Microsoft compatibility. (Lin Ming) BZ 392
9336 Fixed a problem with the Load operator where an exception was not
9339 the case where the table is already loaded. (Lin Ming) BZ 463
9341 Implemented support for the use of DDBHandles as an Indexed Reference, as
9343 the ACPI spec. (Lin Ming) BZ 486
9345 Implemented support for UserTerm (Method invocation) for the Unload
9347 as per the ACPI spec. (Lin Ming) BZ 580
9349 Fixed a problem with the LoadTable operator where the OemId and
9351 input strings could cause unexpected failures if they were shorter than
9353 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
9355 Implemented support for UserTerm (Method invocation) for the Unload
9357 as per the ACPI spec. (Lin Ming) BZ 580
9359 Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
9361 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
9363 Example Code and Data Size: These are the sizes for the OS-independent
9364 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9365 debug version of the code includes the debug output trace mechanism and
9367 a much larger code and data size.
9370 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
9371 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
9373 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
9374 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
9376 2) iASL Compiler/Disassembler and Tools:
9378 Implemented support in the disassembler for checksum validation on
9380 binary DSDTs and SSDTs. If incorrect, a message is displayed within the
9382 header dump at the start of the disassembly.
9384 Implemented additional debugging information in the namespace listing
9386 created during compilation. In addition to the namespace hierarchy, the
9388 pathname to each namespace object is displayed.
9390 Fixed a problem with the disassembler where invalid ACPI tables could
9392 faults or infinite loops.
9394 Fixed an unexpected parse error when using the optional "parameter types"
9395 list in a control method declaration. (Lin Ming) BZ 397
9397 Fixed a problem where two External declarations with the same name did
9399 cause an error (Lin Ming) BZ 509
9401 Implemented support for full TermArgs (adding Argx, Localx and method
9402 invocation) for the ParameterData parameter to the LoadTable operator.
9406 ----------------------------------------
9407 19 December 2007. Summary of changes for version 20071219:
9409 1) ACPI CA Core Subsystem:
9411 Implemented full support for deferred execution for the TermArg string
9412 arguments for DataTableRegion. This enables forward references and full
9413 operand resolution for the three string arguments. Similar to
9415 deferred argument execution.) Lin Ming. BZ 430
9417 Implemented full argument resolution support for the BankValue argument
9419 BankField. Previously, only constants were supported, now any TermArg may
9421 used. Lin Ming BZ 387, 393
9423 Fixed a problem with AcpiGetDevices where the search of a branch of the
9424 device tree could be terminated prematurely. In accordance with the ACPI
9425 specification, the search down the current branch is terminated if a
9427 is both not present and not functional (instead of just not present.)
9431 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
9433 the underlying AML code changed the GPE enable registers. Now, any
9435 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
9437 instead of simply ignored. Rui Zhang.
9439 Fixed a problem with Index Fields where the Index register was
9441 limited to a maximum of 32 bits. Now any size may be used.
9443 Fixed a couple memory leaks associated with "implicit return" objects
9445 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
9447 Example Code and Data Size: These are the sizes for the OS-independent
9448 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9449 debug version of the code includes the debug output trace mechanism and
9451 a much larger code and data size.
9454 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
9455 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
9457 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
9458 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
9460 ----------------------------------------
9461 14 November 2007. Summary of changes for version 20071114:
9463 1) ACPI CA Core Subsystem:
9465 Implemented event counters for each of the Fixed Events, the ACPI SCI
9466 (interrupt) itself, and control methods executed. Named
9467 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
9469 should be useful for debugging and statistics.
9471 Implemented a new external interface, AcpiGetStatistics, to retrieve the
9472 contents of the various event counters. Returns the current values for
9473 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
9474 AcpiMethodCount. The interface can be expanded in the future if new
9476 are added. Device drivers should use this interface rather than access
9480 Fixed a problem with the FromBCD and ToBCD operators. With some
9482 the ShortDivide function worked incorrectly, causing problems with the
9484 functions with large input values. A truncation from 64-bit to 32-bit
9485 inadvertently occurred. Internal BZ 435. Lin Ming
9487 Fixed a problem with Index references passed as method arguments.
9489 passed as arguments to control methods were dereferenced immediately
9491 control was passed to the called method). The references are now
9493 passed directly to the called method. BZ 5389. Lin Ming
9495 Fixed a problem with CopyObject used in conjunction with the Index
9497 The reference was incorrectly dereferenced before the copy. The reference
9499 now correctly copied. BZ 5391. Lin Ming
9501 Fixed a problem with Control Method references within Package objects.
9503 references are now correctly generated. This completes the package
9504 construction overhaul that began in version 20071019.
9506 Example Code and Data Size: These are the sizes for the OS-independent
9507 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9508 debug version of the code includes the debug output trace mechanism and
9510 a much larger code and data size.
9513 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
9514 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
9516 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
9517 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
9520 2) iASL Compiler/Disassembler and Tools:
9522 The AcpiExec utility now installs handlers for all of the predefined
9523 Operation Region types. New types supported are: PCI_Config, CMOS, and
9526 Fixed a problem with the 64-bit version of AcpiExec where the extended
9528 bit) address fields for the DSDT and FACS within the FADT were not being
9529 used, causing truncation of the upper 32-bits of these addresses. Lin
9533 ----------------------------------------
9534 19 October 2007. Summary of changes for version 20071019:
9536 1) ACPI CA Core Subsystem:
9538 Fixed a problem with the Alias operator when the target of the alias is a
9539 named ASL operator that opens a new scope -- Scope, Device,
9541 Processor, and ThermalZone. In these cases, any children of the original
9542 operator could not be accessed via the alias, potentially causing
9544 AE_NOT_FOUND exceptions. (BZ 9067)
9546 Fixed a problem with the Package operator where all named references were
9547 created as object references and left otherwise unresolved. According to
9549 ACPI specification, a Package can only contain Data Objects or references
9551 control methods. The implication is that named references to Data Objects
9552 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
9553 immediately upon package creation. This is the approach taken with this
9554 change. References to all other named objects (Methods, Devices, Scopes,
9555 etc.) are all now properly created as reference objects. (BZ 5328)
9557 Reverted a change to Notify handling that was introduced in version
9558 20070508. This version changed the Notify handling from asynchronous to
9559 fully synchronous (Device driver Notify handling with respect to the
9561 ASL operator). It was found that this change caused more problems than it
9562 solved and was removed by most users.
9564 Fixed a problem with the Increment and Decrement operators where the type
9566 the target object could be unexpectedly and incorrectly changed. (BZ 353)
9569 Fixed a problem with the Load and LoadTable operators where the table
9570 location within the namespace was ignored. Instead, the table was always
9571 loaded into the root or current scope. Lin Ming.
9573 Fixed a problem with the Load operator when loading a table from a buffer
9574 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
9576 Fixed a problem with the Debug object where a store of a DdbHandle
9578 object to the Debug object could cause a fault.
9580 Added a table checksum verification for the Load operator, in the case
9582 the load is from a buffer. (BZ 578).
9584 Implemented additional parameter validation for the LoadTable operator.
9586 length of the input strings SignatureString, OemIdString, and OemTableId
9588 now checked for maximum lengths. (BZ 582) Lin Ming.
9590 Example Code and Data Size: These are the sizes for the OS-independent
9591 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9592 debug version of the code includes the debug output trace mechanism and
9594 a much larger code and data size.
9597 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
9598 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
9600 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
9601 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
9604 2) iASL Compiler/Disassembler:
9606 Fixed a problem where if a single file was specified and the file did not
9607 exist, no error message was emitted. (Introduced with wildcard support in
9610 ----------------------------------------
9611 19 September 2007. Summary of changes for version 20070919:
9613 1) ACPI CA Core Subsystem:
9615 Designed and implemented new external interfaces to install and remove
9616 handlers for ACPI table-related events. Current events that are defined
9618 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
9619 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
9620 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
9622 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
9623 (acpi_serialized option on Linux) could cause some systems to hang during
9624 initialization. (Bob Moore) BZ 8171
9626 Fixed a problem where objects of certain types (Device, ThermalZone,
9627 Processor, PowerResource) can be not found if they are declared and
9628 referenced from within the same control method (Lin Ming) BZ 341
9630 Example Code and Data Size: These are the sizes for the OS-independent
9631 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9632 debug version of the code includes the debug output trace mechanism and
9634 a much larger code and data size.
9637 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
9638 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
9640 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
9641 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
9644 2) iASL Compiler/Disassembler:
9646 Implemented support to allow multiple files to be compiled/disassembled
9649 single invocation. This includes command line wildcard support for both
9651 Windows and Unix versions of the compiler. This feature simplifies the
9652 disassembly and compilation of multiple ACPI tables in a single
9655 ----------------------------------------
9656 08 May 2007. Summary of changes for version 20070508:
9658 1) ACPI CA Core Subsystem:
9660 Implemented a Microsoft compatibility design change for the handling of
9662 Notify AML operator. Previously, notify handlers were dispatched and
9663 executed completely asynchronously in a deferred thread. The new design
9664 still executes the notify handlers in a different thread, but the
9666 thread that executed the Notify() now waits at a synchronization point
9668 the notify handler to complete. Some machines depend on a synchronous
9670 operator in order to operate correctly.
9672 Implemented support to allow Package objects to be passed as method
9673 arguments to the external AcpiEvaluateObject interface. Previously, this
9674 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
9675 implemented since there were no reserved control methods that required it
9678 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
9680 contained invalid non-zero values in reserved fields could cause later
9681 failures because these fields have meaning in later revisions of the
9683 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
9685 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
9687 Fixed a problem where the Global Lock handle was not properly updated if
9689 thread that acquired the Global Lock via executing AML code then
9691 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
9695 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
9696 could be corrupted if the interrupt being removed was at the head of the
9697 list. Reported by Linn Crosetto.
9699 Example Code and Data Size: These are the sizes for the OS-independent
9700 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9701 debug version of the code includes the debug output trace mechanism and
9703 a much larger code and data size.
9706 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9707 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
9709 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
9710 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
9712 ----------------------------------------
9713 20 March 2007. Summary of changes for version 20070320:
9715 1) ACPI CA Core Subsystem:
9717 Implemented a change to the order of interpretation and evaluation of AML
9718 operand objects within the AML interpreter. The interpreter now evaluates
9719 operands in the order that they appear in the AML stream (and the
9720 corresponding ASL code), instead of in the reverse order (after the
9722 operand list has been parsed). The previous behavior caused several
9724 incompatibilities with the Microsoft AML interpreter as well as being
9725 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
9727 Implemented a change to the ACPI Global Lock support. All interfaces to
9729 global lock now allow the same thread to acquire the lock multiple times.
9730 This affects the AcpiAcquireGlobalLock external interface to the global
9732 as well as the internal use of the global lock to support AML fields -- a
9733 control method that is holding the global lock can now simultaneously
9735 AML fields that require global lock protection. Previously, in both
9737 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
9739 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
9740 Controller. There is no change to the behavior of the AML Acquire
9742 as this can already be used to acquire a mutex multiple times by the same
9743 thread. BZ 8066. With assistance from Alexey Starikovskiy.
9745 Fixed a problem where invalid objects could be referenced in the AML
9746 Interpreter after error conditions. During operand evaluation, ensure
9748 the internal "Return Object" field is cleared on error and only valid
9749 pointers are stored there. Caused occasional access to deleted objects
9751 resulted in "large reference count" warning messages. Valery Podrezov.
9753 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
9755 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
9758 Fixed an internal problem with the handling of result objects on the
9759 interpreter result stack. BZ 7872. Valery Podrezov.
9761 Removed obsolete code that handled the case where AML_NAME_OP is the
9763 of a reference (Reference.Opcode). This code was no longer necessary. BZ
9764 7874. Valery Podrezov.
9766 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
9769 remnant from the previously discontinued 16-bit support.
9771 Example Code and Data Size: These are the sizes for the OS-independent
9772 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9773 debug version of the code includes the debug output trace mechanism and
9775 a much larger code and data size.
9778 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9779 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9781 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9782 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
9784 ----------------------------------------
9785 26 January 2007. Summary of changes for version 20070126:
9787 1) ACPI CA Core Subsystem:
9789 Added the 2007 copyright to all module headers and signons. This affects
9790 virtually every file in the ACPICA core subsystem, the iASL compiler, and
9793 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
9794 during a table load. A bad pointer was passed in the case where the DSDT
9796 overridden, causing a fault in this case.
9798 Example Code and Data Size: These are the sizes for the OS-independent
9799 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9800 debug version of the code includes the debug output trace mechanism and
9802 a much larger code and data size.
9805 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9806 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9808 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9809 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9811 ----------------------------------------
9812 15 December 2006. Summary of changes for version 20061215:
9814 1) ACPI CA Core Subsystem:
9816 Support for 16-bit ACPICA has been completely removed since it is no
9818 necessary and it clutters the code. All 16-bit macros, types, and
9819 conditional compiles have been removed, cleaning up and simplifying the
9821 across the entire subsystem. DOS support is no longer needed since the
9822 bootable Linux firmware kit is now available.
9824 The handler for the Global Lock is now removed during AcpiTerminate to
9825 enable a clean subsystem restart, via the implementation of the
9826 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
9829 Implemented enhancements to the multithreading support within the
9831 to enable improved multithreading debugging and evaluation of the
9835 Debugger: Enhanced the Statistics/Memory command to emit the total
9837 memory used during the execution, as well as the maximum memory consumed
9839 each of the various object types. (Valery Podrezov)
9841 Example Code and Data Size: These are the sizes for the OS-independent
9842 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9843 debug version of the code includes the debug output trace mechanism and
9845 a much larger code and data size.
9848 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
9849 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
9851 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
9852 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
9855 2) iASL Compiler/Disassembler and Tools:
9857 AcpiExec: Implemented a new option (-m) to display full memory use
9858 statistics upon subsystem/program termination. (Valery Podrezov)
9860 ----------------------------------------
9861 09 November 2006. Summary of changes for version 20061109:
9863 1) ACPI CA Core Subsystem:
9865 Optimized the Load ASL operator in the case where the source operand is
9867 operation region. Simply map the operation region memory, instead of
9868 performing a bytewise read. (Region must be of type SystemMemory, see
9871 Fixed the Load ASL operator for the case where the source operand is a
9872 region field. A buffer object is also allowed as the source operand. BZ
9875 Fixed a problem where the Load ASL operator allowed the source operand to
9877 an operation region of any type. It is now restricted to regions of type
9878 SystemMemory, as per the ACPI specification. BZ 481
9880 Additional cleanup and optimizations for the new Table Manager code.
9882 AcpiEnable will now fail if all of the required ACPI tables are not
9884 (FADT, FACS, DSDT). BZ 477
9886 Added #pragma pack(8/4) to acobject.h to ensure that the structures in
9888 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
9889 manually optimized to be aligned and will not work if it is byte-packed.
9891 Example Code and Data Size: These are the sizes for the OS-independent
9892 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9893 debug version of the code includes the debug output trace mechanism and
9895 a much larger code and data size.
9898 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
9899 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
9901 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
9902 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
9905 2) iASL Compiler/Disassembler and Tools:
9907 Fixed a problem where the presence of the _OSI predefined control method
9908 within complex expressions could cause an internal compiler error.
9910 AcpiExec: Implemented full region support for multiple address spaces.
9911 SpaceId is now part of the REGION object. BZ 429
9913 ----------------------------------------
9914 11 October 2006. Summary of changes for version 20061011:
9916 1) ACPI CA Core Subsystem:
9918 Completed an AML interpreter performance enhancement for control method
9919 execution. Previously a 2-pass parse/execution, control methods are now
9920 completely parsed and executed in a single pass. This improves overall
9921 interpreter performance by ~25%, reduces code size, and reduces CPU stack
9922 use. (Valery Podrezov + interpreter changes in version 20051202 that
9923 eliminated namespace loading during the pass one parse.)
9925 Implemented _CID support for PCI Root Bridge detection. If the _HID does
9927 match the predefined PCI Root Bridge IDs, the _CID list (if present) is
9929 obtained and also checked for an ID match.
9931 Implemented additional support for the PCI _ADR execution: upsearch until
9933 device scope is found before executing _ADR. This allows PCI_Config
9934 operation regions to be declared locally within control methods
9938 Fixed a problem with a possible race condition between threads executing
9939 AcpiWalkNamespace and the AML interpreter. This condition was removed by
9940 modifying AcpiWalkNamespace to (by default) ignore all temporary
9942 entries created during any concurrent control method execution. An
9943 additional namespace race condition is known to exist between
9944 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
9947 Restructured the AML ParseLoop function, breaking it into several
9948 subfunctions in order to reduce CPU stack use and improve
9952 AcpiGetHandle: Fix for parameter validation to detect invalid
9954 of prefix handle and pathname. BZ 478
9956 Example Code and Data Size: These are the sizes for the OS-independent
9957 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9958 debug version of the code includes the debug output trace mechanism and
9960 a much larger code and data size.
9963 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
9964 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
9966 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
9967 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
9969 2) iASL Compiler/Disassembler and Tools:
9971 Ported the -g option (get local ACPI tables) to the new ACPICA Table
9973 to restore original behavior.
9975 ----------------------------------------
9976 27 September 2006. Summary of changes for version 20060927:
9978 1) ACPI CA Core Subsystem:
9980 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
9981 These functions now use a spinlock for mutual exclusion and the interrupt
9982 level indication flag is not needed.
9984 Fixed a problem with the Global Lock where the lock could appear to be
9985 obtained before it is actually obtained. The global lock semaphore was
9986 inadvertently created with one unit instead of zero units. (BZ 464)
9990 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
9992 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
9994 Example Code and Data Size: These are the sizes for the OS-independent
9995 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9996 debug version of the code includes the debug output trace mechanism and
9998 a much larger code and data size.
10001 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10002 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
10004 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10005 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
10008 2) iASL Compiler/Disassembler and Tools:
10010 Fixed a compilation problem with the pre-defined Resource Descriptor
10012 names where an "object does not exist" error could be incorrectly
10014 if the parent ResourceTemplate pathname places the template within a
10015 different namespace scope than the current scope. (BZ 7212)
10017 Fixed a problem where the compiler could hang after syntax errors
10019 in an ElseIf construct. (BZ 453)
10021 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
10022 operator. An incorrect output filename was produced when this parameter
10024 a null string (""). Now, the original input filename is used as the AML
10025 output filename, with an ".aml" extension.
10027 Implemented a generic batch command mode for the AcpiExec utility
10029 any AML debugger command) (Valery Podrezov).
10031 ----------------------------------------
10032 12 September 2006. Summary of changes for version 20060912:
10034 1) ACPI CA Core Subsystem:
10036 Enhanced the implementation of the "serialized mode" of the interpreter
10037 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
10038 specified, instead of creating a serialization semaphore per control
10040 the interpreter lock is simply no longer released before a blocking
10041 operation during control method execution. This effectively makes the AML
10042 Interpreter single-threaded. The overhead of a semaphore per-method is
10045 Fixed a regression where an error was no longer emitted if a control
10047 attempts to create 2 objects of the same name. This once again returns
10048 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
10050 will dynamically serialize the control method to possible prevent future
10053 Integrated a fix for a problem with PCI Express HID detection in the PCI
10054 Config Space setup procedure. (BZ 7145)
10056 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
10057 AcpiHwInitialize function - the FADT registers are now validated when the
10060 Added two new warnings during FADT verification - 1) if the FADT is
10062 than the largest known FADT version, and 2) if there is a mismatch
10065 32-bit block address and the 64-bit X counterpart (when both are non-
10068 Example Code and Data Size: These are the sizes for the OS-independent
10069 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10070 debug version of the code includes the debug output trace mechanism and
10072 a much larger code and data size.
10075 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
10076 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
10078 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
10079 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
10082 2) iASL Compiler/Disassembler and Tools:
10084 Fixed a problem with the implementation of the Switch() operator where
10086 temporary variable was declared too close to the actual Switch, instead
10088 at method level. This could cause a problem if the Switch() operator is
10089 within a while loop, causing an error on the second iteration. (BZ 460)
10091 Disassembler - fix for error emitted for unknown type for target of scope
10092 operator. Now, ignore it and continue.
10094 Disassembly of an FADT now verifies the input FADT and reports any errors
10095 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
10097 Disassembly of raw data buffers with byte initialization data now
10099 each output line with the current buffer offset.
10101 Disassembly of ASF! table now includes all variable-length data fields at
10102 the end of some of the subtables.
10104 The disassembler now emits a comment if a buffer appears to be a
10105 ResourceTemplate, but cannot be disassembled as such because the EndTag
10107 not appear at the very end of the buffer.
10109 AcpiExec - Added the "-t" command line option to enable the serialized
10111 of the AML interpreter.
10113 ----------------------------------------
10114 31 August 2006. Summary of changes for version 20060831:
10116 1) ACPI CA Core Subsystem:
10118 Miscellaneous fixes for the Table Manager:
10119 - Correctly initialize internal common FADT for all 64-bit "X" fields
10120 - Fixed a couple table mapping issues during table load
10121 - Fixed a couple alignment issues for IA64
10122 - Initialize input array to zero in AcpiInitializeTables
10123 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
10124 AcpiGetTableByIndex
10126 Change for GPE support: when a "wake" GPE is received, all wake GPEs are
10128 immediately disabled to prevent the waking GPE from firing again and to
10129 prevent other wake GPEs from interrupting the wake process.
10131 Added the AcpiGpeCount global that tracks the number of processed GPEs,
10133 be used for debugging systems with a large number of ACPI interrupts.
10135 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
10136 both the ACPICA headers and the disassembler.
10138 Example Code and Data Size: These are the sizes for the OS-independent
10139 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10140 debug version of the code includes the debug output trace mechanism and
10142 a much larger code and data size.
10145 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
10146 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
10148 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
10149 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
10152 2) iASL Compiler/Disassembler and Tools:
10154 Disassembler support for the DMAR ACPI table.
10156 ----------------------------------------
10157 23 August 2006. Summary of changes for version 20060823:
10159 1) ACPI CA Core Subsystem:
10161 The Table Manager component has been completely redesigned and
10162 reimplemented. The new design is much simpler, and reduces the overall
10164 and data size of the kernel-resident ACPICA by approximately 5%. Also, it
10166 now possible to obtain the ACPI tables very early during kernel
10167 initialization, even before dynamic memory management is initialized.
10168 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
10170 Obsolete ACPICA interfaces:
10172 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
10175 - AcpiLoadTable: Not needed.
10176 - AcpiUnloadTable: Not needed.
10178 New ACPICA interfaces:
10180 - AcpiInitializeTables: Must be called before the table manager can be
10182 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
10183 allocated memory after it becomes available.
10184 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
10188 Other ACPICA changes:
10190 - AcpiGetTableHeader returns the actual mapped table header, not a copy.
10192 AcpiOsUnmapMemory to free this mapping.
10193 - AcpiGetTable returns the actual mapped table. The mapping is managed
10194 internally and must not be deleted by the caller. Use of this interface
10195 causes no additional dynamic memory allocation.
10196 - AcpiFindRootPointer: Support for physical addressing has been
10198 it appeared to be unused.
10199 - The interface to AcpiOsMapMemory has changed to be consistent with the
10200 other allocation interfaces.
10201 - The interface to AcpiOsGetRootPointer has changed to eliminate
10204 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
10206 bit platforms. Was previously 64 bits on all platforms.
10207 - The interface to the ACPI Global Lock acquire/release macros have
10209 slightly since ACPICA no longer keeps a local copy of the FACS with a
10210 constructed pointer to the actual global lock.
10212 Porting to the new table manager:
10214 - AcpiInitializeTables: Must be called once, and can be called anytime
10215 during the OS initialization process. It allows the host to specify an
10217 of memory to be used to store the internal version of the RSDT/XSDT (root
10218 table). This allows the host to access ACPI tables before memory
10220 is initialized and running.
10221 - AcpiReallocateRootTable: Can be called after memory management is
10223 to copy the root table to a dynamically allocated array, freeing up the
10224 scratch memory specified in the call to AcpiInitializeTables.
10225 - AcpiSubsystemInitialize: This existing interface is independent of the
10226 Table Manager, and does not have to be called before the Table Manager
10228 be used, it only must be called before the rest of ACPICA can be used.
10229 - ACPI Tables: Some changes have been made to the names and structure of
10231 actbl.h and actbl1.h header files and may require changes to existing
10233 For example, bitfields have been completely removed because of their lack
10235 portability across C compilers.
10236 - Update interfaces to the Global Lock acquire/release macros if local
10237 versions are used. (see acwin.h)
10239 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
10241 New files: tbfind.c
10243 Example Code and Data Size: These are the sizes for the OS-independent
10244 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10245 debug version of the code includes the debug output trace mechanism and
10247 a much larger code and data size.
10250 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10251 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10253 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
10254 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
10257 2) iASL Compiler/Disassembler and Tools:
10259 No changes for this release.
10261 ----------------------------------------
10262 21 July 2006. Summary of changes for version 20060721:
10264 1) ACPI CA Core Subsystem:
10266 The full source code for the ASL test suite used to validate the iASL
10267 compiler and the ACPICA core subsystem is being released with the ACPICA
10268 source for the first time. The source is contained in a separate package
10270 consists of over 1100 files that exercise all ASL/AML operators. The
10272 should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
10276 Completed a new design and implementation for support of the ACPI Global
10277 Lock. On the OS side, the global lock is now treated as a standard AML
10278 mutex. Previously, multiple OS threads could "acquire" the global lock
10279 simultaneously. However, this could cause the BIOS to be starved out of
10281 lock - especially in cases such as the Embedded Controller driver where
10282 there is a tight coupling between the OS and the BIOS.
10284 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
10285 The Global Lock interrupt handler no longer queues the execution of a
10286 separate thread to signal the global lock semaphore. Instead, the
10288 is signaled directly from the interrupt handler.
10290 Implemented support within the AML interpreter for package objects that
10291 contain a larger AML length (package list length) than the package
10293 count. In this case, the length of the package is truncated to match the
10294 package element count. Some BIOS code apparently modifies the package
10296 on the fly, and this change supports this behavior. Provides
10298 with the MS AML interpreter. (With assistance from Fiodor Suietov)
10300 Implemented a temporary fix for the BankValue parameter of a Bank Field
10302 support all constant values, now including the Zero and One opcodes.
10303 Evaluation of this parameter must eventually be converted to a full
10305 evaluation. A not-implemented error is now returned (temporarily) for
10307 constant values for this parameter.
10309 Fixed problem reports (Fiodor Suietov) integrated:
10310 - Fix for premature object deletion after CopyObject on Operation Region
10314 Example Code and Data Size: These are the sizes for the OS-independent
10315 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10316 debug version of the code includes the debug output trace mechanism and
10318 a much larger code and data size.
10321 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
10322 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
10324 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10325 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10328 2) iASL Compiler/Disassembler and Tools:
10330 No changes for this release.
10332 ----------------------------------------
10333 07 July 2006. Summary of changes for version 20060707:
10335 1) ACPI CA Core Subsystem:
10337 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
10338 that do not allow the initialization of address pointers within packed
10339 structures - even though the hardware itself may support misaligned
10340 transfers. Some of the debug data structures are packed by default to
10343 Added an error message for the case where AcpiOsGetThreadId() returns
10345 A non-zero value is required by the core ACPICA code to ensure the proper
10346 operation of AML mutexes and recursive control methods.
10348 The DSDT is now the only ACPI table that determines whether the AML
10349 interpreter is in 32-bit or 64-bit mode. Not really a functional change,
10351 the hooks for per-table 32/64 switching have been removed from the code.
10353 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
10355 Fixed a possible leak of an OwnerID in the error path of
10356 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
10357 deletion to a single place in AcpiTbUninstallTable to correct possible
10359 when using the AcpiTbDeleteTablesByType interface (with assistance from
10362 Fixed a problem with Serialized control methods where the semaphore
10363 associated with the method could be over-signaled after multiple method
10366 Fixed two issues with the locking of the internal namespace data
10368 Both the Unload() operator and AcpiUnloadTable interface now lock the
10369 namespace during the namespace deletion associated with the table unload
10370 (with assistance from Linn Crosetto.)
10372 Fixed problem reports (Valery Podrezov) integrated:
10373 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
10375 Fixed problem reports (Fiodor Suietov) integrated:
10376 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
10377 - On Address Space handler deletion, needless deactivation call (BZ 374)
10378 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
10380 - Possible memory leak, Notify sub-objects of Processor, Power,
10383 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
10384 - Minimum Length of RSDT should be validated (BZ 379)
10385 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
10387 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
10391 Example Code and Data Size: These are the sizes for the OS-independent
10392 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10393 debug version of the code includes the debug output trace mechanism and
10395 a much larger code and data size.
10398 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
10399 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
10401 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
10402 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
10405 2) iASL Compiler/Disassembler and Tools:
10407 Fixed problem reports:
10408 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
10411 ----------------------------------------
10412 23 June 2006. Summary of changes for version 20060623:
10414 1) ACPI CA Core Subsystem:
10416 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
10417 allows the type to be customized to the host OS for improved efficiency
10418 (since a spinlock is usually a very small object.)
10420 Implemented support for "ignored" bits in the ACPI registers. According
10422 the ACPI specification, these bits should be preserved when writing the
10423 registers via a read/modify/write cycle. There are 3 bits preserved in
10425 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
10427 Implemented the initial deployment of new OSL mutex interfaces. Since
10429 host operating systems have separate mutex and semaphore objects, this
10430 feature was requested. The base code now uses mutexes (and the new mutex
10431 interfaces) wherever a binary semaphore was used previously. However, for
10432 the current release, the mutex interfaces are defined as macros to map
10434 to the existing semaphore interfaces. Therefore, no OSL changes are
10436 at this time. (See acpiosxf.h)
10438 Fixed several problems with the support for the control method SyncLevel
10439 parameter. The SyncLevel now works according to the ACPI specification
10441 in concert with the Mutex SyncLevel parameter, since the current
10443 is a property of the executing thread. Mutual exclusion for control
10445 is now implemented with a mutex instead of a semaphore.
10447 Fixed three instances of the use of the C shift operator in the bitfield
10448 support code (exfldio.c) to avoid the use of a shift value larger than
10450 target data width. The behavior of C compilers is undefined in this case
10452 can cause unpredictable results, and therefore the case must be detected
10454 avoided. (Fiodor Suietov)
10456 Added an info message whenever an SSDT or OEM table is loaded dynamically
10457 via the Load() or LoadTable() ASL operators. This should improve
10459 capability since it will show exactly what tables have been loaded
10461 the tables present in the RSDT/XSDT.)
10463 Example Code and Data Size: These are the sizes for the OS-independent
10464 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10465 debug version of the code includes the debug output trace mechanism and
10467 a much larger code and data size.
10470 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
10471 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
10473 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
10474 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
10477 2) iASL Compiler/Disassembler and Tools:
10479 No changes for this release.
10481 ----------------------------------------
10482 08 June 2006. Summary of changes for version 20060608:
10484 1) ACPI CA Core Subsystem:
10486 Converted the locking mutex used for the ACPI hardware to a spinlock.
10488 change should eliminate all problems caused by attempting to acquire a
10489 semaphore at interrupt level, and it means that all ACPICA external
10490 interfaces that directly access the ACPI hardware can be safely called
10492 interrupt level. OSL code that implements the semaphore interfaces should
10494 able to eliminate any workarounds for being called at interrupt level.
10496 Fixed a regression introduced in 20060526 where the ACPI device
10497 initialization could be prematurely aborted with an AE_NOT_FOUND if a
10499 did not have an optional _INI method.
10501 Fixed an IndexField issue where a write to the Data Register should be
10502 limited in size to the AccessSize (width) of the IndexField itself. (BZ
10506 Fixed problem reports (Valery Podrezov) integrated:
10507 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
10509 Fixed problem reports (Fiodor Suietov) integrated:
10510 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
10512 Removed four global mutexes that were obsolete and were no longer being
10515 Example Code and Data Size: These are the sizes for the OS-independent
10516 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10517 debug version of the code includes the debug output trace mechanism and
10519 a much larger code and data size.
10522 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
10523 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
10525 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
10526 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
10529 2) iASL Compiler/Disassembler and Tools:
10531 Fixed a fault when using -g option (get tables from registry) on Windows
10534 Fixed problem reports integrated:
10535 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
10536 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
10538 - Global table revision override (-r) is ignored (BZ 413)
10540 ----------------------------------------
10541 26 May 2006. Summary of changes for version 20060526:
10543 1) ACPI CA Core Subsystem:
10545 Restructured, flattened, and simplified the internal interfaces for
10546 namespace object evaluation - resulting in smaller code, less CPU stack
10548 and fewer interfaces. (With assistance from Mikhail Kouzmich)
10550 Fixed a problem with the CopyObject operator where the first parameter
10552 not typed correctly for the parser, interpreter, compiler, and
10554 Caused various errors and unexpected behavior.
10556 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
10557 produced incorrect results with some C compilers. Since the behavior of C
10558 compilers when the shift value is larger than the datatype width is
10559 apparently not well defined, the interpreter now detects this condition
10561 simply returns zero as expected in all such cases. (BZ 395)
10563 Fixed problem reports (Valery Podrezov) integrated:
10564 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
10565 - Allow interpreter to handle nested method declarations (BZ 5361)
10567 Fixed problem reports (Fiodor Suietov) integrated:
10568 - AcpiTerminate doesn't free debug memory allocation list objects (BZ
10570 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
10572 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
10573 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
10574 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
10575 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
10576 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
10577 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
10578 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
10580 - Status of the Global Initialization Handler call not used (BZ 366)
10581 - Incorrect object parameter to Global Initialization Handler (BZ 367)
10583 Example Code and Data Size: These are the sizes for the OS-independent
10584 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10585 debug version of the code includes the debug output trace mechanism and
10587 a much larger code and data size.
10590 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
10591 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
10593 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
10594 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
10597 2) iASL Compiler/Disassembler and Tools:
10599 Modified the parser to allow the names IO, DMA, and IRQ to be used as
10600 namespace identifiers with no collision with existing resource descriptor
10601 macro names. This provides compatibility with other ASL compilers and is
10602 most useful for disassembly/recompilation of existing tables without
10604 errors. (With assistance from Thomas Renninger)
10606 Disassembler: fixed an incorrect disassembly problem with the
10607 DataTableRegion and CopyObject operators. Fixed a possible fault during
10608 disassembly of some Alias operators.
10610 ----------------------------------------
10611 12 May 2006. Summary of changes for version 20060512:
10613 1) ACPI CA Core Subsystem:
10615 Replaced the AcpiOsQueueForExecution interface with a new interface named
10616 AcpiOsExecute. The major difference is that the new interface does not
10618 a Priority parameter, this appeared to be useless and has been replaced
10621 Type parameter. The Type tells the host what type of execution is being
10622 requested, such as global lock handler, notify handler, GPE handler, etc.
10623 This allows the host to queue and execute the request as appropriate for
10625 request type, possibly using different work queues and different
10627 for the various request types. This enables fixes for multithreading
10628 deadlock problems such as BZ #5534, and will require changes to all
10630 OS interface layers. (Alexey Starikovskiy and Bob Moore)
10632 Fixed a possible memory leak associated with the support for the so-
10634 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
10637 Fixed a problem with the Load() operator where a table load from an
10638 operation region could overwrite an internal table buffer by up to 7
10640 and cause alignment faults on IPF systems. (With assistance from Luming
10643 Example Code and Data Size: These are the sizes for the OS-independent
10644 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10645 debug version of the code includes the debug output trace mechanism and
10647 a much larger code and data size.
10650 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
10651 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
10653 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
10654 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
10658 2) iASL Compiler/Disassembler and Tools:
10660 Disassembler: Implemented support to cross reference the internal
10662 and automatically generate ASL External() statements for symbols not
10664 within the current table being disassembled. This will simplify the
10665 disassembly and recompilation of interdependent tables such as SSDTs
10667 these statements will no longer have to be added manually.
10669 Disassembler: Implemented experimental support to automatically detect
10670 invocations of external control methods and generate appropriate
10672 statements. This is problematic because the AML cannot be correctly
10674 until the number of arguments for each control method is known.
10676 standalone method invocations and invocations as the source operand of a
10677 Store() statement are supported.
10679 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
10680 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
10681 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
10682 more readable and likely closer to the original ASL source.
10684 ----------------------------------------
10685 21 April 2006. Summary of changes for version 20060421:
10687 1) ACPI CA Core Subsystem:
10689 Removed a device initialization optimization introduced in 20051216 where
10690 the _STA method was not run unless an _INI was also present for the same
10691 device. This optimization could cause problems because it could allow
10693 methods to be run within a not-present device subtree. (If a not-present
10694 device had no _INI, _STA would not be run, the not-present status would
10696 be discovered, and the children of the device would be incorrectly
10699 Implemented a new _STA optimization where namespace subtrees that do not
10700 contain _INI are identified and ignored during device initialization.
10701 Selectively running _STA can significantly improve boot time on large
10702 machines (with assistance from Len Brown.)
10704 Implemented support for the device initialization case where the returned
10705 _STA flags indicate a device not-present but functioning. In this case,
10707 is not run, but the device children are examined for presence, as per the
10708 ACPI specification.
10710 Implemented an additional change to the IndexField support in order to
10711 conform to MS behavior. The value written to the Index Register is not
10712 simply a byte offset, it is a byte offset in units of the access width of
10713 the parent Index Field. (Fiodor Suietov)
10715 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
10716 interface is called during the creation of all AML operation regions, and
10717 allows the host OS to exert control over what addresses it will allow the
10718 AML code to access. Operation Regions whose addresses are disallowed will
10719 cause a runtime exception when they are actually accessed (will not
10721 or abort table loading.) See oswinxf or osunixxf for an example
10724 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
10725 interface allows the host OS to match the various "optional"
10726 interface/behavior strings for the _OSI predefined control method as
10727 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
10728 for an example implementation.
10730 Restructured and corrected various problems in the exception handling
10732 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
10733 (with assistance from Takayoshi Kochi.)
10735 Modified the Linux source converter to ignore quoted string literals
10737 converting identifiers from mixed to lower case. This will correct
10739 with the disassembler and other areas where such strings must not be
10742 The ACPI_FUNCTION_* macros no longer require quotes around the function
10743 name. This allows the Linux source converter to convert the names, now
10745 the converter ignores quoted strings.
10747 Example Code and Data Size: These are the sizes for the OS-independent
10748 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10749 debug version of the code includes the debug output trace mechanism and
10751 a much larger code and data size.
10755 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
10756 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
10758 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
10759 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
10762 2) iASL Compiler/Disassembler and Tools:
10764 Implemented 3 new warnings for iASL, and implemented multiple warning
10768 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
10770 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
10771 check for the possible timeout, a warning is issued.
10773 2) Useless operators: If an ASL operator does not specify an optional
10775 operand and it also does not use the function return value from the
10776 operator, a warning is issued since the operator effectively does
10779 3) Unreferenced objects: If a namespace object is created, but never
10780 referenced, a warning is issued. This is a warning level 2 since there
10782 cases where this is ok, such as when a secondary table is loaded that
10784 the unreferenced objects. Even so, care is taken to only flag objects
10786 don't look like they will ever be used. For example, the reserved methods
10787 (starting with an underscore) are usually not referenced because it is
10788 expected that the OS will invoke them.
10790 ----------------------------------------
10791 31 March 2006. Summary of changes for version 20060331:
10793 1) ACPI CA Core Subsystem:
10795 Implemented header file support for the following additional ACPI tables:
10796 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
10798 all current and known ACPI tables are now defined in the ACPICA headers
10800 are available for use by device drivers and other software.
10802 Implemented support to allow tables that contain ACPI names with invalid
10803 characters to be loaded. Previously, this would cause the table load to
10804 fail, but since there are several known cases of such tables on existing
10805 machines, this change was made to enable ACPI support for them. Also,
10807 matches the behavior of the Microsoft ACPI implementation.
10809 Fixed a couple regressions introduced during the memory optimization in
10811 20060317 release. The namespace node definition required additional
10812 reorganization and an internal datatype that had been changed to 8-bit
10814 restored to 32-bit. (Valery Podrezov)
10816 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
10817 could be passed through to AcpiOsReleaseObject which is unexpected. Such
10818 null pointers are now trapped and ignored, matching the behavior of the
10819 previous implementation before the deployment of AcpiOsReleaseObject.
10820 (Valery Podrezov, Fiodor Suietov)
10822 Fixed a memory mapping leak during the deletion of a SystemMemory
10824 region where a cached memory mapping was not deleted. This became a
10825 noticeable problem for operation regions that are defined within
10827 used control methods. (Dana Meyers)
10829 Reorganized the ACPI table header files into two main files: one for the
10830 ACPI tables consumed by the ACPICA core, and another for the
10832 ACPI tables that are consumed by the drivers and other software. The
10834 FADT definitions were merged into one common section and three different
10835 tables (ACPI 1.0, 1.0+, and 2.0)
10837 Example Code and Data Size: These are the sizes for the OS-independent
10838 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10839 debug version of the code includes the debug output trace mechanism and
10841 a much larger code and data size.
10844 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
10845 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
10847 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
10848 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
10851 2) iASL Compiler/Disassembler and Tools:
10853 Disassembler: Implemented support to decode and format all non-AML ACPI
10854 tables (tables other than DSDTs and SSDTs.) This includes the new tables
10855 added to the ACPICA headers, therefore all current and known ACPI tables
10859 Disassembler: The change to allow ACPI names with invalid characters also
10860 enables the disassembly of such tables. Invalid characters within names
10862 changed to '*' to make the name printable; the iASL compiler will still
10863 generate an error for such names, however, since this is an invalid ACPI
10866 Implemented an option for AcpiXtract (-a) to extract all tables found in
10868 input file. The default invocation extracts only the DSDTs and SSDTs.
10870 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
10871 makefile for the AcpiXtract utility.
10873 ----------------------------------------
10874 17 March 2006. Summary of changes for version 20060317:
10876 1) ACPI CA Core Subsystem:
10878 Implemented the use of a cache object for all internal namespace nodes.
10879 Since there are about 1000 static nodes in a typical system, this will
10880 decrease memory use for cache implementations that minimize per-
10882 overhead (such as a slab allocator.)
10884 Removed the reference count mechanism for internal namespace nodes, since
10886 was deemed unnecessary. This reduces the size of each namespace node by
10887 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
10889 and 32 bytes for the 64-bit case.
10891 Optimized several internal data structures to reduce object size on 64-
10893 platforms by packing data within the 64-bit alignment. This includes the
10894 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
10895 instances corresponding to the namespace objects.
10897 Added two new strings for the predefined _OSI method: "Windows 2001.1
10899 and "Windows 2006".
10901 Split the allocation tracking mechanism out to a separate file, from
10902 utalloc.c to uttrack.c. This mechanism appears to be only useful for
10903 application-level code. Kernels may wish to not include uttrack.c in
10906 Removed all remnants of the obsolete ACPI_REPORT_* macros and the
10908 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
10911 Code and Data Size: These are the sizes for the acpica.lib produced by
10913 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
10915 driver or OSPM code. The debug version of the code includes the debug
10917 trace mechanism and has a much larger code and data size. Note that these
10918 values will vary depending on the efficiency of the compiler and the
10919 compiler options used during generation.
10922 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
10923 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
10925 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
10926 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
10929 2) iASL Compiler/Disassembler and Tools:
10931 Implemented an ANSI C version of the acpixtract utility. This version
10933 automatically extract the DSDT and all SSDTs from the input acpidump text
10934 file and dump the binary output to separate files. It can also display a
10935 summary of the input file including the headers for each table found and
10936 will extract any single ACPI table, with any signature. (See
10937 source/tools/acpixtract)
10939 ----------------------------------------
10940 10 March 2006. Summary of changes for version 20060310:
10942 1) ACPI CA Core Subsystem:
10944 Tagged all external interfaces to the subsystem with the new
10945 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
10947 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
10948 macro. The default definition is NULL.
10950 Added the ACPI_THREAD_ID type for the return value from
10952 This allows the host to define this as necessary to simplify kernel
10953 integration. The default definition is ACPI_NATIVE_UINT.
10955 Fixed two interpreter problems related to error processing, the deletion
10957 objects, and placing invalid pointers onto the internal operator result
10958 stack. BZ 6028, 6151 (Valery Podrezov)
10960 Increased the reference count threshold where a warning is emitted for
10962 reference counts in order to eliminate unnecessary warnings on systems
10964 large namespaces (especially 64-bit.) Increased the value from 0x400 to
10967 Due to universal disagreement as to the meaning of the 'c' in the
10969 function, the ACPI_MEM_CALLOCATE macro has been renamed to
10970 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
10971 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
10974 Code and Data Size: These are the sizes for the acpica.lib produced by
10976 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
10978 driver or OSPM code. The debug version of the code includes the debug
10980 trace mechanism and has a much larger code and data size. Note that these
10981 values will vary depending on the efficiency of the compiler and the
10982 compiler options used during generation.
10985 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
10986 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
10988 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
10989 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
10992 2) iASL Compiler/Disassembler:
10994 Disassembler: implemented support for symbolic resource descriptor
10995 references. If a CreateXxxxField operator references a fixed offset
10998 resource descriptor, a name is assigned to the descriptor and the offset
11000 translated to the appropriate resource tag and pathname. The addition of
11001 this support brings the disassembled code very close to the original ASL
11002 source code and helps eliminate run-time errors when the disassembled
11004 is modified (and recompiled) in such a way as to invalidate the original
11007 Implemented support for a Descriptor Name as the last parameter to the
11009 Register() macro. This parameter was inadvertently left out of the ACPI
11010 specification, and will be added for ACPI 3.0b.
11012 Fixed a problem where the use of the "_OSI" string (versus the full path
11013 "\_OSI") caused an internal compiler error. ("No back ptr to op")
11015 Fixed a problem with the error message that occurs when an invalid string
11017 used for a _HID object (such as one with an embedded asterisk:
11019 The correct message is now displayed.
11021 ----------------------------------------
11022 17 February 2006. Summary of changes for version 20060217:
11024 1) ACPI CA Core Subsystem:
11026 Implemented a change to the IndexField support to match the behavior of
11028 Microsoft AML interpreter. The value written to the Index register is now
11030 byte offset, no longer an index based upon the width of the Data
11032 This should fix IndexField problems seen on some machines where the Data
11033 register is not exactly one byte wide. The ACPI specification will be
11034 clarified on this point.
11036 Fixed a problem where several resource descriptor types could overrun the
11037 internal descriptor buffer due to size miscalculation: VendorShort,
11038 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
11039 affect all platforms.
11041 Fixed a problem where individual resource descriptors were misaligned
11043 the internal buffer, causing alignment faults on IA64 platforms.
11045 Code and Data Size: These are the sizes for the acpica.lib produced by
11047 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11049 driver or OSPM code. The debug version of the code includes the debug
11051 trace mechanism and has a much larger code and data size. Note that these
11052 values will vary depending on the efficiency of the compiler and the
11053 compiler options used during generation.
11056 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11057 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
11059 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
11060 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
11063 2) iASL Compiler/Disassembler:
11065 Implemented support for new reserved names: _WDG and _WED are Microsoft
11066 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
11067 defined method (Throttling Depth Limit.)
11069 Fixed a problem where a zero-length VendorShort or VendorLong resource
11070 descriptor was incorrectly emitted as a descriptor of length one.
11072 ----------------------------------------
11073 10 February 2006. Summary of changes for version 20060210:
11075 1) ACPI CA Core Subsystem:
11077 Removed a couple of extraneous ACPI_ERROR messages that appeared during
11078 normal execution. These became apparent after the conversion from
11081 Fixed a problem where the CreateField operator could hang if the BitIndex
11083 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
11085 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
11086 failed with an exception. This also fixes a couple of related RefOf and
11087 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
11089 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
11091 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
11095 Implemented a memory cleanup at the end of the execution of each
11097 of an AML While() loop, preventing the accumulation of outstanding
11099 (Valery Podrezov, BZ 5427)
11101 Eliminated a chunk of duplicate code in the object resolution code.
11105 Fixed several warnings during the 64-bit code generation.
11107 The AcpiSrc source code conversion tool now inserts one line of
11109 after an if() statement that is followed immediately by a comment,
11111 readability of the Linux code.
11113 Code and Data Size: The current and previous library sizes for the core
11114 subsystem are shown below. These are the code and data sizes for the
11115 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11117 values do not include any ACPI driver or OSPM code. The debug version of
11119 code includes the debug output trace mechanism and has a much larger code
11120 and data size. Note that these values will vary depending on the
11122 of the compiler and the compiler options used during generation.
11125 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
11126 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
11128 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
11129 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
11132 2) iASL Compiler/Disassembler:
11134 Fixed a problem with the disassembly of a BankField operator with a
11136 expression for the BankValue parameter.
11138 ----------------------------------------
11139 27 January 2006. Summary of changes for version 20060127:
11141 1) ACPI CA Core Subsystem:
11143 Implemented support in the Resource Manager to allow unresolved
11145 references within resource package objects for the _PRT method. This
11147 is in addition to the previously implemented unresolved reference support
11148 within the AML parser. If the interpreter slack mode is enabled, these
11149 unresolved references will be passed through to the caller as a NULL
11153 Implemented and deployed new macros and functions for error and warning
11154 messages across the subsystem. These macros are simpler and generate less
11155 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
11156 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
11157 macros remain defined to allow ACPI drivers time to migrate to the new
11160 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
11162 Acquire/Release Lock OSL interfaces.
11164 Fixed a problem where Alias ASL operators are sometimes not correctly
11165 resolved, in both the interpreter and the iASL compiler.
11167 Fixed several problems with the implementation of the
11168 ConcatenateResTemplate
11169 ASL operator. As per the ACPI specification, zero length buffers are now
11170 treated as a single EndTag. One-length buffers always cause a fatal
11171 exception. Non-zero length buffers that do not end with a full 2-byte
11173 cause a fatal exception.
11175 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
11176 interface. (With assistance from Thomas Renninger)
11178 Code and Data Size: The current and previous library sizes for the core
11179 subsystem are shown below. These are the code and data sizes for the
11180 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11182 values do not include any ACPI driver or OSPM code. The debug version of
11184 code includes the debug output trace mechanism and has a much larger code
11185 and data size. Note that these values will vary depending on the
11187 of the compiler and the compiler options used during generation.
11190 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
11191 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
11193 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
11194 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
11197 2) iASL Compiler/Disassembler:
11199 Fixed an internal error that was generated for any forward references to
11203 ----------------------------------------
11204 13 January 2006. Summary of changes for version 20060113:
11206 1) ACPI CA Core Subsystem:
11208 Added 2006 copyright to all module headers and signons. This affects
11209 virtually every file in the ACPICA core subsystem, iASL compiler, and the
11212 Enhanced the ACPICA error reporting in order to simplify user migration
11214 the non-debug version of ACPICA. Replaced all instances of the
11215 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
11217 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
11218 respectively. This preserves all error and warning messages in the non-
11220 version of the ACPICA code (this has been referred to as the "debug lite"
11221 option.) Over 200 cases were converted to create a total of over 380
11222 error/warning messages across the ACPICA code. This increases the code
11224 data size of the default non-debug version of the code somewhat (about
11226 but all error/warning reporting may be disabled if desired (and code
11227 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
11228 configuration option. The size of the debug version of ACPICA remains
11232 Fixed a memory leak within the AML Debugger "Set" command. One object was
11233 not properly deleted for every successful invocation of the command.
11235 Code and Data Size: The current and previous library sizes for the core
11236 subsystem are shown below. These are the code and data sizes for the
11237 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11239 values do not include any ACPI driver or OSPM code. The debug version of
11241 code includes the debug output trace mechanism and has a much larger code
11242 and data size. Note that these values will vary depending on the
11244 of the compiler and the compiler options used during generation.
11247 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
11248 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
11250 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
11251 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
11254 2) iASL Compiler/Disassembler:
11256 The compiler now officially supports the ACPI 3.0a specification that was
11257 released on December 30, 2005. (Specification is available at
11260 ----------------------------------------
11261 16 December 2005. Summary of changes for version 20051216:
11263 1) ACPI CA Core Subsystem:
11265 Implemented optional support to allow unresolved names within ASL Package
11266 objects. A null object is inserted in the package when a named reference
11267 cannot be located in the current namespace. Enabled via the interpreter
11268 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
11270 that contain such code.
11272 Implemented an optimization to the initialization sequence that can
11274 boot time. During ACPI device initialization, the _STA method is now run
11276 and only if the _INI method exists. The _STA method is used to determine
11278 the device is present; An _INI can only be run if _STA returns present,
11280 it is a waste of time to run the _STA method if the _INI does not exist.
11281 (Prototype and assistance from Dong Wei)
11283 Implemented use of the C99 uintptr_t for the pointer casting macros if it
11285 available in the current compiler. Otherwise, the default (void *) cast
11289 Fixed some possible memory leaks found within the execution path of the
11290 Break, Continue, If, and CreateField operators. (Valery Podrezov)
11292 Fixed a problem introduced in the 20051202 release where an exception is
11293 generated during method execution if a control method attempts to declare
11296 Moved resource descriptor string constants that are used by both the AML
11297 disassembler and AML debugger to the common utilities directory so that
11298 these components are independent.
11300 Implemented support in the AcpiExec utility (-e switch) to globally
11302 exceptions during control method execution (method is not aborted.)
11304 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
11307 Code and Data Size: The current and previous library sizes for the core
11308 subsystem are shown below. These are the code and data sizes for the
11309 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11311 values do not include any ACPI driver or OSPM code. The debug version of
11313 code includes the debug output trace mechanism and has a much larger code
11314 and data size. Note that these values will vary depending on the
11316 of the compiler and the compiler options used during generation.
11319 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11320 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
11322 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
11323 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
11326 2) iASL Compiler/Disassembler:
11328 Fixed a problem where a CPU stack overflow fault could occur if a
11330 method call was made from within a Return statement.
11332 ----------------------------------------
11333 02 December 2005. Summary of changes for version 20051202:
11335 1) ACPI CA Core Subsystem:
11337 Modified the parsing of control methods to no longer create namespace
11338 objects during the first pass of the parse. Objects are now created only
11339 during the execute phase, at the moment the namespace creation operator
11341 encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
11343 should eliminate ALREADY_EXISTS exceptions seen on some machines where
11344 reentrant control methods are protected by an AML mutex. The mutex will
11346 correctly block multiple threads from attempting to create the same
11350 Increased the number of available Owner Ids for namespace object tracking
11351 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
11353 some machines with a large number of ACPI tables (either static or
11356 Fixed a problem with the AcpiExec utility where a fault could occur when
11358 -b switch (batch mode) is used.
11360 Enhanced the namespace dump routine to output the owner ID for each
11363 Code and Data Size: The current and previous library sizes for the core
11364 subsystem are shown below. These are the code and data sizes for the
11365 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11367 values do not include any ACPI driver or OSPM code. The debug version of
11369 code includes the debug output trace mechanism and has a much larger code
11370 and data size. Note that these values will vary depending on the
11372 of the compiler and the compiler options used during generation.
11375 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11376 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11378 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11379 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
11382 2) iASL Compiler/Disassembler:
11384 Fixed a parse error during compilation of certain Switch/Case constructs.
11386 simplify the parse, the grammar now allows for multiple Default
11388 and this error is now detected and flagged during the analysis phase.
11390 Disassembler: The disassembly now includes the contents of the original
11391 table header within a comment at the start of the file. This includes the
11392 name and version of the original ASL compiler.
11394 ----------------------------------------
11395 17 November 2005. Summary of changes for version 20051117:
11397 1) ACPI CA Core Subsystem:
11399 Fixed a problem in the AML parser where the method thread count could be
11400 decremented below zero if any errors occurred during the method parse
11402 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
11404 This also fixed a related regression with the mechanism that detects and
11405 corrects methods that cannot properly handle reentrancy (related to the
11406 deployment of the new OwnerId mechanism.)
11408 Eliminated the pre-parsing of control methods (to detect errors) during
11409 table load. Related to the problem above, this was causing unwind issues
11411 any errors occurred during the parse, and it seemed to be overkill. A
11413 load should not be aborted if there are problems with any single control
11414 method, thus rendering this feature rather pointless.
11416 Fixed a problem with the new table-driven resource manager where an
11418 buffer overflow could occur for small resource templates.
11420 Implemented a new external interface, AcpiGetVendorResource. This
11422 will find and return a vendor-defined resource descriptor within a _CRS
11424 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
11427 Removed the length limit (200) on string objects as per the upcoming ACPI
11428 3.0A specification. This affects the following areas of the interpreter:
11430 any implicit conversion of a Buffer to a String, 2) a String object
11432 of the ASL Concatentate operator, 3) the String object result of the ASL
11435 Fixed a problem in the Windows OS interface layer (OSL) where a
11437 on a semaphore object would incorrectly timeout. This allows the
11438 multithreading features of the AcpiExec utility to work properly under
11441 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
11442 the recently added file named "utresrc.c".
11444 Code and Data Size: The current and previous library sizes for the core
11445 subsystem are shown below. These are the code and data sizes for the
11446 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11448 values do not include any ACPI driver or OSPM code. The debug version of
11450 code includes the debug output trace mechanism and has a much larger code
11451 and data size. Note that these values will vary depending on the
11453 of the compiler and the compiler options used during generation.
11456 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
11457 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11459 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
11460 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11463 2) iASL Compiler/Disassembler:
11465 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
11466 specification. For the iASL compiler, this means that string literals
11468 the source ASL can be of any length.
11470 Enhanced the listing output to dump the AML code for resource descriptors
11471 immediately after the ASL code for each descriptor, instead of in a block
11473 the end of the entire resource template.
11475 Enhanced the compiler debug output to dump the entire original parse tree
11476 constructed during the parse phase, before any transforms are applied to
11478 tree. The transformed tree is dumped also.
11480 ----------------------------------------
11481 02 November 2005. Summary of changes for version 20051102:
11483 1) ACPI CA Core Subsystem:
11485 Modified the subsystem initialization sequence to improve GPE support.
11487 GPE initialization has been split into two parts in order to defer
11489 of the _PRW methods (Power Resources for Wake) until after the hardware
11491 fully initialized and the SCI handler is installed. This allows the _PRW
11492 methods to access fields protected by the Global Lock. This will fix
11494 where a NO_GLOBAL_LOCK exception has been seen during initialization.
11496 Converted the ACPI internal object disassemble and display code within
11498 AML debugger to fully table-driven operation, reducing code size and
11499 increasing maintainability.
11501 Fixed a regression with the ConcatenateResTemplate() ASL operator
11503 in the 20051021 release.
11505 Implemented support for "local" internal ACPI object types within the
11506 debugger "Object" command and the AcpiWalkNamespace external interfaces.
11507 These local types include RegionFields, BankFields, IndexFields, Alias,
11511 Moved common AML resource handling code into a new file, "utresrc.c".
11513 code is shared by both the Resource Manager and the AML Debugger.
11515 Code and Data Size: The current and previous library sizes for the core
11516 subsystem are shown below. These are the code and data sizes for the
11517 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11519 values do not include any ACPI driver or OSPM code. The debug version of
11521 code includes the debug output trace mechanism and has a much larger code
11522 and data size. Note that these values will vary depending on the
11524 of the compiler and the compiler options used during generation.
11527 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
11528 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
11530 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
11531 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
11534 2) iASL Compiler/Disassembler:
11536 Fixed a problem with very large initializer lists (more than 4000
11538 for both Buffer and Package objects where the parse stack could overflow.
11540 Enhanced the pre-compile source code scan for non-ASCII characters to
11542 characters within comment fields. The scan is now always performed and is
11544 longer optional, detecting invalid characters within a source file
11545 immediately rather than during the parse phase or later.
11547 Enhanced the ASL grammar definition to force early reductions on all
11549 style grammar elements so that the overall parse stack usage is greatly
11550 reduced. This should improve performance and reduce the possibility of
11554 Eliminated all reduce/reduce conflicts in the iASL parser generation.
11556 with the addition of a %expected statement, the compiler generates from
11557 source with no warnings.
11559 Fixed a possible segment fault in the disassembler if the input filename
11560 does not contain a "dot" extension (Thomas Renninger).
11562 ----------------------------------------
11563 21 October 2005. Summary of changes for version 20051021:
11565 1) ACPI CA Core Subsystem:
11567 Implemented support for the EM64T and other x86-64 processors. This
11568 essentially entails recognizing that these processors support non-aligned
11569 memory transfers. Previously, all 64-bit processors were assumed to lack
11570 hardware support for non-aligned transfers.
11572 Completed conversion of the Resource Manager to nearly full table-driven
11573 operation. Specifically, the resource conversion code (convert AML to
11574 internal format and the reverse) and the debug code to dump internal
11575 resource descriptors are fully table-driven, reducing code and data size
11577 improving maintainability.
11579 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
11581 on 64-bit processors instead of a fixed 32-bit word. (With assistance
11583 Alexey Starikovskiy)
11585 Implemented support within the resource conversion code for the Type-
11586 Specific byte within the various ACPI 3.0 *WordSpace macros.
11588 Fixed some issues within the resource conversion code for the type-
11590 flags for both Memory and I/O address resource descriptors. For Memory,
11591 implemented support for the MTP and TTP flags. For I/O, split the TRS and
11592 TTP flags into two separate fields.
11594 Code and Data Size: The current and previous library sizes for the core
11595 subsystem are shown below. These are the code and data sizes for the
11596 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11598 values do not include any ACPI driver or OSPM code. The debug version of
11600 code includes the debug output trace mechanism and has a much larger code
11601 and data size. Note that these values will vary depending on the
11603 of the compiler and the compiler options used during generation.
11606 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
11607 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
11609 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
11610 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
11614 2) iASL Compiler/Disassembler:
11616 Relaxed a compiler restriction that disallowed a ResourceIndex byte if
11618 corresponding ResourceSource string was not also present in a resource
11619 descriptor declaration. This restriction caused problems with existing
11620 AML/ASL code that includes the Index byte without the string. When such
11622 was disassembled, it could not be compiled without modification. Further,
11623 the modified code created a resource template with a different size than
11625 original, breaking code that used fixed offsets into the resource
11629 Removed a recent feature of the disassembler to ignore a lone
11631 byte. This byte is now emitted if present so that the exact AML can be
11632 reproduced when the disassembled code is recompiled.
11634 Improved comments and text alignment for the resource descriptor code
11635 emitted by the disassembler.
11637 Implemented disassembler support for the ACPI 3.0 AccessSize field within
11639 Register() resource descriptor.
11641 ----------------------------------------
11642 30 September 2005. Summary of changes for version 20050930:
11644 1) ACPI CA Core Subsystem:
11646 Completed a major overhaul of the Resource Manager code - specifically,
11647 optimizations in the area of the AML/internal resource conversion code.
11649 code has been optimized to simplify and eliminate duplicated code, CPU
11651 use has been decreased by optimizing function parameters and local
11652 variables, and naming conventions across the manager have been
11654 for clarity and ease of maintenance (this includes function, parameter,
11655 variable, and struct/typedef names.) The update may force changes in some
11656 driver code, depending on how resources are handled by the host OS.
11658 All Resource Manager dispatch and information tables have been moved to a
11659 single location for clarity and ease of maintenance. One new file was
11660 created, named "rsinfo.c".
11662 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
11663 guarantee that the argument is not evaluated twice, making them less
11665 to macro side-effects. However, since there exists the possibility of
11666 additional stack use if a particular compiler cannot optimize them (such
11668 in the debug generation case), the original macros are optionally
11670 Note that some invocations of the return_VALUE macro may now cause size
11671 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
11673 eliminate these. (From Randy Dunlap)
11675 Implemented a new mechanism to enable debug tracing for individual
11677 methods. A new external interface, AcpiDebugTrace, is provided to enable
11678 this mechanism. The intent is to allow the host OS to easily enable and
11679 disable tracing for problematic control methods. This interface can be
11680 easily exposed to a user or debugger interface if desired. See the file
11681 psxface.c for details.
11683 AcpiUtCallocate will now return a valid pointer if a length of zero is
11684 specified - a length of one is used and a warning is issued. This matches
11685 the behavior of AcpiUtAllocate.
11687 Code and Data Size: The current and previous library sizes for the core
11688 subsystem are shown below. These are the code and data sizes for the
11689 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11691 values do not include any ACPI driver or OSPM code. The debug version of
11693 code includes the debug output trace mechanism and has a much larger code
11694 and data size. Note that these values will vary depending on the
11696 of the compiler and the compiler options used during generation.
11699 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
11700 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
11702 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
11703 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
11706 2) iASL Compiler/Disassembler:
11708 A remark is issued if the effective compile-time length of a package or
11709 buffer is zero. Previously, this was a warning.
11711 ----------------------------------------
11712 16 September 2005. Summary of changes for version 20050916:
11714 1) ACPI CA Core Subsystem:
11716 Fixed a problem within the Resource Manager where support for the Generic
11717 Register descriptor was not fully implemented. This descriptor is now
11719 recognized, parsed, disassembled, and displayed.
11721 Completely restructured the Resource Manager code to utilize table-driven
11722 dispatch and lookup, eliminating many of the large switch() statements.
11724 reduces overall subsystem code size and code complexity. Affects the
11725 resource parsing and construction, disassembly, and debug dump output.
11727 Cleaned up and restructured the debug dump output for all resource
11728 descriptors. Improved readability of the output and reduced code size.
11730 Fixed a problem where changes to internal data structures caused the
11731 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
11733 Code and Data Size: The current and previous library sizes for the core
11734 subsystem are shown below. These are the code and data sizes for the
11735 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11737 values do not include any ACPI driver or OSPM code. The debug version of
11739 code includes the debug output trace mechanism and has a much larger code
11740 and data size. Note that these values will vary depending on the
11742 of the compiler and the compiler options used during generation.
11745 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
11746 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
11748 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
11749 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
11752 2) iASL Compiler/Disassembler:
11754 Updated the disassembler to automatically insert an EndDependentFn()
11756 into the ASL stream if this macro is missing in the original AML code,
11757 simplifying compilation of the resulting ASL module.
11759 Fixed a problem in the disassembler where a disassembled ResourceSource
11760 string (within a large resource descriptor) was not surrounded by quotes
11762 not followed by a comma, causing errors when the resulting ASL module was
11763 compiled. Also, escape sequences within a ResourceSource string are now
11764 handled correctly (especially "\\")
11766 ----------------------------------------
11767 02 September 2005. Summary of changes for version 20050902:
11769 1) ACPI CA Core Subsystem:
11771 Fixed a problem with the internal Owner ID allocation and deallocation
11772 mechanisms for control method execution and recursive method invocation.
11773 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
11774 messages seen on some systems. Recursive method invocation depth is
11775 currently limited to 255. (Alexey Starikovskiy)
11777 Completely eliminated all vestiges of support for the "module-level
11778 executable code" until this support is fully implemented and debugged.
11780 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
11781 some systems that invoke this support.
11783 Fixed a problem within the resource manager code where the transaction
11785 for a 64-bit address descriptor were handled incorrectly in the type-
11786 specific flag byte.
11788 Consolidated duplicate code within the address descriptor resource
11790 code, reducing overall subsystem code size.
11792 Fixed a fault when using the AML debugger "disassemble" command to
11793 disassemble individual control methods.
11795 Removed references to the "release_current" directory within the Unix
11798 Code and Data Size: The current and previous core subsystem library sizes
11799 are shown below. These are the code and data sizes for the acpica.lib
11800 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
11801 include any ACPI driver or OSPM code. The debug version of the code
11803 the debug output trace mechanism and has a much larger code and data
11805 Note that these values will vary depending on the efficiency of the
11807 and the compiler options used during generation.
11810 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11811 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
11813 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
11814 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
11817 2) iASL Compiler/Disassembler:
11819 Implemented an error check for illegal duplicate values in the interrupt
11821 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
11824 Implemented error checking for the Irq() and IrqNoFlags() macros to
11826 too many values in the interrupt list (16 max) and invalid values in the
11827 list (range 0 - 15)
11829 The maximum length string literal within an ASL file is now restricted to
11830 200 characters as per the ACPI specification.
11832 Fixed a fault when using the -ln option (generate namespace listing).
11834 Implemented an error check to determine if a DescriptorName within a
11835 resource descriptor has already been used within the current scope.
11837 ----------------------------------------
11838 15 August 2005. Summary of changes for version 20050815:
11840 1) ACPI CA Core Subsystem:
11842 Implemented a full bytewise compare to determine if a table load request
11844 attempting to load a duplicate table. The compare is performed if the
11846 signatures and table lengths match. This will allow different tables with
11847 the same OEM Table ID and revision to be loaded - probably against the
11849 specification, but discovered in the field nonetheless.
11851 Added the changes.txt logfile to each of the zipped release packages.
11853 Code and Data Size: Current and previous core subsystem library sizes are
11854 shown below. These are the code and data sizes for the acpica.lib
11856 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11857 any ACPI driver or OSPM code. The debug version of the code includes the
11858 debug output trace mechanism and has a much larger code and data size.
11860 that these values will vary depending on the efficiency of the compiler
11862 the compiler options used during generation.
11865 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11866 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
11868 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11869 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
11872 2) iASL Compiler/Disassembler:
11874 Fixed a problem where incorrect AML code could be generated for Package
11875 objects if optimization is disabled (via the -oa switch).
11877 Fixed a problem with where incorrect AML code is generated for variable-
11878 length packages when the package length is not specified and the number
11880 initializer values is greater than 255.
11883 ----------------------------------------
11884 29 July 2005. Summary of changes for version 20050729:
11886 1) ACPI CA Core Subsystem:
11888 Implemented support to ignore an attempt to install/load a particular
11890 table more than once. Apparently there exists BIOS code that repeatedly
11891 attempts to load the same SSDT upon certain events. With assistance from
11892 Venkatesh Pallipadi.
11894 Restructured the main interface to the AML parser in order to correctly
11895 handle all exceptional conditions. This will prevent leakage of the
11897 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
11899 machines. With assistance from Alexey Starikovskiy.
11901 Support for "module level code" has been disabled in this version due to
11903 number of issues that have appeared on various machines. The support can
11905 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
11906 compilation. When the issues are fully resolved, the code will be enabled
11910 Modified the internal functions for debug print support to define the
11911 FunctionName parameter as a (const char *) for compatibility with
11913 built-in macros such as __FUNCTION__, etc.
11915 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
11917 Implemented support to display an object count summary for the AML
11919 commands Object and Methods.
11921 Code and Data Size: Current and previous core subsystem library sizes are
11922 shown below. These are the code and data sizes for the acpica.lib
11924 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11925 any ACPI driver or OSPM code. The debug version of the code includes the
11926 debug output trace mechanism and has a much larger code and data size.
11928 that these values will vary depending on the efficiency of the compiler
11930 the compiler options used during generation.
11933 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
11934 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
11936 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
11937 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
11940 2) iASL Compiler/Disassembler:
11942 Fixed a regression that appeared in the 20050708 version of the compiler
11943 where an error message was inadvertently emitted for invocations of the
11945 reserved control method.
11947 ----------------------------------------
11948 08 July 2005. Summary of changes for version 20050708:
11950 1) ACPI CA Core Subsystem:
11952 The use of the CPU stack in the debug version of the subsystem has been
11953 considerably reduced. Previously, a debug structure was declared in every
11954 function that used the debug macros. This structure has been removed in
11955 favor of declaring the individual elements as parameters to the debug
11956 functions. This reduces the cumulative stack use during nested execution
11958 ACPI function calls at the cost of a small increase in the code size of
11960 debug version of the subsystem. With assistance from Alexey Starikovskiy
11964 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
11965 headers to define a macro that will return the current function name at
11966 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
11968 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
11969 compiler-dependent header, the function name is saved on the CPU stack
11971 pointer per function.) This mechanism is used because apparently there
11972 exists no standard ANSI-C defined macro that that returns the function
11975 Redesigned and reimplemented the "Owner ID" mechanism used to track
11976 namespace objects created/deleted by ACPI tables and control method
11977 execution. A bitmap is now used to allocate and free the IDs, thus
11979 the wraparound problem present in the previous implementation. The size
11981 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
11984 Removed the UINT32_BIT and UINT16_BIT types that were used for the
11986 flag definitions within the headers for the predefined ACPI tables. These
11987 have been replaced by UINT8_BIT in order to increase the code portability
11989 the subsystem. If the use of UINT8 remains a problem, we may be forced to
11990 eliminate bitfields entirely because of a lack of portability.
11992 Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
11994 is a frequently used function and this improvement increases the
11996 of the entire subsystem (Alexey Starikovskiy).
11998 Fixed several possible memory leaks and the inverse - premature object
11999 deletion (Alexey Starikovskiy).
12001 Code and Data Size: Current and previous core subsystem library sizes are
12002 shown below. These are the code and data sizes for the acpica.lib
12004 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12005 any ACPI driver or OSPM code. The debug version of the code includes the
12006 debug output trace mechanism and has a much larger code and data size.
12008 that these values will vary depending on the efficiency of the compiler
12010 the compiler options used during generation.
12013 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
12014 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
12016 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
12017 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
12019 ----------------------------------------
12020 24 June 2005. Summary of changes for version 20050624:
12022 1) ACPI CA Core Subsystem:
12024 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
12025 the host-defined cache object. This allows the OSL implementation to
12027 and type this object in any manner desired, simplifying the OSL
12028 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
12029 Linux, and should be defined in the OS-specific header file for other
12030 operating systems as required.
12032 Changed the interface to AcpiOsAcquireObject to directly return the
12033 requested object as the function return (instead of ACPI_STATUS.) This
12034 change was made for performance reasons, since this is the purpose of the
12035 interface in the first place. AcpiOsAcquireObject is now similar to the
12036 AcpiOsAllocate interface.
12038 Implemented a new AML debugger command named Businfo. This command
12040 information about all devices that have an associate _PRT object. The
12042 _HID, _UID, and _CID are displayed for these devices.
12044 Modified the initialization sequence in AcpiInitializeSubsystem to call
12046 OSL interface AcpiOslInitialize first, before any local initialization.
12048 change was required because the global initialization now calls OSL
12051 Enhanced the Dump command to display the entire contents of Package
12053 (including all sub-objects and their values.)
12055 Restructured the code base to split some files because of size and/or
12056 because the code logically belonged in a separate file. New files are
12058 below. All makefiles and project files included in the ACPI CA release
12061 utilities/utcache.c /* Local cache interfaces */
12062 utilities/utmutex.c /* Local mutex support */
12063 utilities/utstate.c /* State object support */
12064 interpreter/parser/psloop.c /* Main AML parse loop */
12066 Code and Data Size: Current and previous core subsystem library sizes are
12067 shown below. These are the code and data sizes for the acpica.lib
12069 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12070 any ACPI driver or OSPM code. The debug version of the code includes the
12071 debug output trace mechanism and has a much larger code and data size.
12073 that these values will vary depending on the efficiency of the compiler
12075 the compiler options used during generation.
12078 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
12079 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
12081 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
12082 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
12085 2) iASL Compiler/Disassembler:
12087 Fixed a regression introduced in version 20050513 where the use of a
12089 object within a Case() statement caused a compile time exception. The
12090 original behavior has been restored (a Match() operator is emitted.)
12092 ----------------------------------------
12093 17 June 2005. Summary of changes for version 20050617:
12095 1) ACPI CA Core Subsystem:
12097 Moved the object cache operations into the OS interface layer (OSL) to
12099 the host OS to handle these operations if desired (for example, the Linux
12100 OSL will invoke the slab allocator). This support is optional; the
12102 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
12104 code in the ACPI CA core. The new OSL interfaces are shown below. See
12105 utalloc.c for an example implementation, and acpiosxf.h for the exact
12106 interface definitions. With assistance from Alexey Starikovskiy.
12110 AcpiOsAcquireObject
12111 AcpiOsReleaseObject
12113 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
12115 and restore a flags parameter. This fits better with many OS lock models.
12116 Note: the current execution state (interrupt handler or not) is no longer
12117 passed to these interfaces. If necessary, the OSL must determine this
12119 by itself, a simple and fast operation. With assistance from Alexey
12122 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
12123 present if the revision of the RSDP was 2 or greater. According to the
12125 specification, the XSDT is optional in all cases, and the table manager
12126 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
12127 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
12131 Fixed an interpreter problem with the Mid() operator in the case of an
12133 string where the resulting output string is of zero length. It now
12135 returns a valid, null terminated string object instead of a string object
12136 with a null pointer.
12138 Fixed a problem with the control method argument handling to allow a
12140 to an Arg object that already contains an object of type Device. The
12142 object is now correctly overwritten. Previously, an error was returned.
12145 Enhanced the debugger Find command to emit object values in addition to
12147 found object pathnames. The output format is the same as the dump
12151 Enhanced the debugger Set command. It now has the ability to set the
12153 of any Named integer object in the namespace (Previously, only method
12155 and args could be set.)
12157 Code and Data Size: Current and previous core subsystem library sizes are
12158 shown below. These are the code and data sizes for the acpica.lib
12160 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12161 any ACPI driver or OSPM code. The debug version of the code includes the
12162 debug output trace mechanism and has a much larger code and data size.
12164 that these values will vary depending on the efficiency of the compiler
12166 the compiler options used during generation.
12169 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
12170 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
12172 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
12173 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
12176 2) iASL Compiler/Disassembler:
12178 Fixed a regression in the disassembler where if/else/while constructs
12180 output incorrectly. This problem was introduced in the previous release
12181 (20050526). This problem also affected the single-step disassembly in the
12184 Fixed a problem where compiling the reserved _OSI method would randomly
12186 rarely) produce compile errors.
12188 Enhanced the disassembler to emit compilable code in the face of
12190 AML resource descriptors. If the optional ResourceSourceIndex is present,
12191 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
12192 disassembly. Otherwise, the resulting code cannot be compiled without
12195 ----------------------------------------
12196 26 May 2005. Summary of changes for version 20050526:
12198 1) ACPI CA Core Subsystem:
12200 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
12201 the module level (not within a control method.) These opcodes are
12203 exactly once at the time the table is loaded. This type of code was legal
12205 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
12207 order to provide backwards compatibility with earlier BIOS
12209 This eliminates the "Encountered executable code at module level" warning
12210 that was previously generated upon detection of such code.
12212 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
12213 inadvertently be generated during the lookup of namespace objects in the
12214 second pass parse of ACPI tables and control methods. It appears that
12216 problem could occur during the resolution of forward references to
12220 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
12221 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
12222 allows the deadlock detection debug code to be compiled out in the normal
12223 case, improving mutex performance (and overall subsystem performance)
12226 Implemented a handful of miscellaneous fixes for possible memory leaks on
12227 error conditions and error handling control paths. These fixes were
12228 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
12230 Added a check for a null RSDT pointer in AcpiGetFirmwareTable
12232 to prevent a fault in this error case.
12234 Code and Data Size: Current and previous core subsystem library sizes are
12235 shown below. These are the code and data sizes for the acpica.lib
12237 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12238 any ACPI driver or OSPM code. The debug version of the code includes the
12239 debug output trace mechanism and has a much larger code and data size.
12241 that these values will vary depending on the efficiency of the compiler
12243 the compiler options used during generation.
12246 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12247 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12249 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
12250 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
12253 2) iASL Compiler/Disassembler:
12255 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
12256 the module level (not within a control method.) These operators will be
12257 executed once at the time the table is loaded. This type of code was
12259 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
12260 compiler in order to provide backwards compatibility with earlier BIOS
12264 The ACPI integer width (specified via the table revision ID or the -r
12265 override, 32 or 64 bits) is now used internally during compile-time
12267 folding to ensure that constants are truncated to 32 bits if necessary.
12268 Previously, the revision ID value was only emitted in the AML table
12271 An error message is now generated for the Mutex and Method operators if
12273 SyncLevel parameter is outside the legal range of 0 through 15.
12275 Fixed a problem with the Method operator ParameterTypes list handling
12277 3.0). Previously, more than 2 types or 2 arguments generated a syntax
12279 The actual underlying implementation of method argument typechecking is
12280 still under development, however.
12282 ----------------------------------------
12283 13 May 2005. Summary of changes for version 20050513:
12285 1) ACPI CA Core Subsystem:
12287 Implemented support for PCI Express root bridges -- added support for
12289 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
12291 The interpreter now automatically truncates incoming 64-bit constants to
12293 bits if currently executing out of a 32-bit ACPI table (Revision < 2).
12295 also affects the iASL compiler constant folding. (Note: as per below, the
12296 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
12298 Fixed a problem where string and buffer objects with "static" pointers
12299 (pointers to initialization data within an ACPI table) were not handled
12300 consistently. The internal object copy operation now always copies the
12302 to a newly allocated buffer, regardless of whether the source object is
12305 Fixed a problem with the FromBCD operator where an implicit result
12306 conversion was improperly performed while storing the result to the
12308 operand. Since this is an "explicit conversion" operator, the implicit
12309 conversion should never be performed on the output.
12311 Fixed a problem with the CopyObject operator where a copy to an existing
12312 named object did not always completely overwrite the existing object
12314 at name. Specifically, a buffer-to-buffer copy did not delete the
12318 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
12320 structs for consistency.
12322 Code and Data Size: Current and previous core subsystem library sizes are
12323 shown below. These are the code and data sizes for the acpica.lib
12325 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12326 any ACPI driver or OSPM code. The debug version of the code includes the
12327 debug output trace mechanism and has a much larger code and data size.
12329 that these values will vary depending on the efficiency of the compiler
12331 the compiler options used during generation.
12334 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12335 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12336 Current Release: (Same sizes)
12337 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12338 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12341 2) iASL Compiler/Disassembler:
12343 The compiler now emits a warning if an attempt is made to generate a 64-
12345 integer constant from within a 32-bit ACPI table (Revision < 2). The
12347 is truncated to 32 bits.
12349 Fixed a problem with large package objects: if the static length of the
12350 package is greater than 255, the "variable length package" opcode is
12351 emitted. Previously, this caused an error. This requires an update to the
12352 ACPI spec, since it currently (incorrectly) states that packages larger
12354 255 elements are not allowed.
12356 The disassembler now correctly handles variable length packages and
12358 larger than 255 elements.
12360 ----------------------------------------
12361 08 April 2005. Summary of changes for version 20050408:
12363 1) ACPI CA Core Subsystem:
12365 Fixed three cases in the interpreter where an "index" argument to an ASL
12366 function was still (internally) 32 bits instead of the required 64 bits.
12367 This was the Index argument to the Index, Mid, and Match operators.
12369 The "strupr" function is now permanently local (AcpiUtStrupr), since this
12371 not a POSIX-defined function and not present in most kernel-level C
12372 libraries. All references to the C library strupr function have been
12376 Completed the deployment of static functions/prototypes. All prototypes
12378 the static attribute have been moved from the headers to the owning C
12381 Implemented an extract option (-e) for the AcpiBin utility (AML binary
12382 utility). This option allows the utility to extract individual ACPI
12384 from the output of AcpiDmp. It provides the same functionality of the
12385 acpixtract.pl perl script without the worry of setting the correct perl
12386 options. AcpiBin runs on Windows and has not yet been generated/validated
12388 the Linux/Unix environment (but should be soon).
12390 Updated and fixed the table dump option for AcpiBin (-d). This option
12391 converts a single ACPI table to a hex/ascii file, similar to the output
12395 Code and Data Size: Current and previous core subsystem library sizes are
12396 shown below. These are the code and data sizes for the acpica.lib
12398 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12399 any ACPI driver or OSPM code. The debug version of the code includes the
12400 debug output trace mechanism and has a much larger code and data size.
12402 that these values will vary depending on the efficiency of the compiler
12404 the compiler options used during generation.
12407 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
12408 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
12410 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
12411 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
12414 2) iASL Compiler/Disassembler:
12416 Disassembler fix: Added a check to ensure that the table length found in
12418 ACPI table header within the input file is not longer than the actual
12420 file size. This indicates some kind of file or table corruption.
12422 ----------------------------------------
12423 29 March 2005. Summary of changes for version 20050329:
12425 1) ACPI CA Core Subsystem:
12427 An error is now generated if an attempt is made to create a Buffer Field
12429 length zero (A CreateField with a length operand of zero.)
12431 The interpreter now issues a warning whenever executable code at the
12433 level is detected during ACPI table load. This will give some idea of the
12434 prevalence of this type of code.
12436 Implemented support for references to named objects (other than control
12437 methods) within package objects.
12439 Enhanced package object output for the debug object. Package objects are
12441 completely dumped, showing all elements.
12443 Enhanced miscellaneous object output for the debug object. Any object can
12444 now be written to the debug object (for example, a device object can be
12445 written, and the type of the object will be displayed.)
12447 The "static" qualifier has been added to all local functions across both
12449 core subsystem and the iASL compiler.
12451 The number of "long" lines (> 80 chars) within the source has been
12452 significantly reduced, by about 1/3.
12454 Cleaned up all header files to ensure that all CA/iASL functions are
12455 prototyped (even static functions) and the formatting is consistent.
12457 Two new header files have been added, acopcode.h and acnames.h.
12459 Removed several obsolete functions that were no longer used.
12461 Code and Data Size: Current and previous core subsystem library sizes are
12462 shown below. These are the code and data sizes for the acpica.lib
12464 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12465 any ACPI driver or OSPM code. The debug version of the code includes the
12466 debug output trace mechanism and has a much larger code and data size.
12468 that these values will vary depending on the efficiency of the compiler
12470 the compiler options used during generation.
12473 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12474 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
12476 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
12477 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
12481 2) iASL Compiler/Disassembler:
12483 Fixed a problem with the resource descriptor generation/support. For the
12484 ResourceSourceIndex and the ResourceSource fields, both must be present,
12486 both must be not present - can't have one without the other.
12488 The compiler now returns non-zero from the main procedure if any errors
12490 occurred during the compilation.
12493 ----------------------------------------
12494 09 March 2005. Summary of changes for version 20050309:
12496 1) ACPI CA Core Subsystem:
12498 The string-to-buffer implicit conversion code has been modified again
12500 a change to the ACPI specification. In order to match the behavior of
12502 other major ACPI implementation, the target buffer is no longer truncated
12504 the source string is smaller than an existing target buffer. This change
12505 requires an update to the ACPI spec, and should eliminate the recent
12506 AE_AML_BUFFER_LIMIT issues.
12508 The "implicit return" support was rewritten to a new algorithm that
12510 the general case. Rather than attempt to determine when a method is about
12512 exit, the result of every ASL operator is saved momentarily until the
12514 next ASL operator is executed. Therefore, no matter how the method exits,
12515 there will always be a saved implicit return value. This feature is only
12516 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
12518 AE_AML_NO_RETURN_VALUE errors when enabled.
12520 Implemented implicit conversion support for the predicate (operand) of
12522 If, Else, and While operators. String and Buffer arguments are
12524 converted to Integers.
12526 Changed the string-to-integer conversion behavior to match the new ACPI
12527 errata: "If no integer object exists, a new integer is created. The ASCII
12528 string is interpreted as a hexadecimal constant. Each string character is
12529 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
12530 with the first character as the most significant digit, and ending with
12532 first non-hexadecimal character or end-of-string." This means that the
12534 non-hex character terminates the conversion and this is the code that was
12537 Fixed a problem where the ObjectType operator would fail (fault) when
12539 on an Index of a Package which pointed to a null package element. The
12540 operator now properly returns zero (Uninitialized) in this case.
12542 Fixed a problem where the While operator used excessive memory by not
12543 properly popping the result stack during execution. There was no memory
12545 after execution, however. (Code provided by Valery Podrezov.)
12547 Fixed a problem where references to control methods within Package
12549 caused the method to be invoked, instead of producing a reference object
12550 pointing to the method.
12552 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
12554 improve performance and reduce code size. (Code provided by Alexey
12557 Code and Data Size: Current and previous core subsystem library sizes are
12558 shown below. These are the code and data sizes for the acpica.lib
12560 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12561 any ACPI driver or OSPM code. The debug version of the code includes the
12562 debug output trace mechanism and has a much larger code and data size.
12564 that these values will vary depending on the efficiency of the compiler
12566 the compiler options used during generation.
12569 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12570 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
12572 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12573 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
12576 2) iASL Compiler/Disassembler:
12578 Fixed a problem with the Return operator with no arguments. Since the AML
12579 grammar for the byte encoding requires an operand for the Return opcode,
12581 compiler now emits a Return(Zero) for this case. An ACPI specification
12582 update has been written for this case.
12584 For tables other than the DSDT, namepath optimization is automatically
12585 disabled. This is because SSDTs can be loaded anywhere in the namespace,
12587 compiler has no knowledge of where, and thus cannot optimize namepaths.
12589 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
12590 inadvertently omitted from the ACPI specification, and will require an
12591 update to the spec.
12593 The source file scan for ASCII characters is now optional (-a). This
12595 was made because some vendors place non-ascii characters within comments.
12596 However, the scan is simply a brute-force byte compare to ensure all
12597 characters in the file are in the range 0x00 to 0x7F.
12599 Fixed a problem with the CondRefOf operator where the compiler was
12600 inappropriately checking for the existence of the target. Since the point
12602 the operator is to check for the existence of the target at run-time, the
12603 compiler no longer checks for the target existence.
12605 Fixed a problem where errors generated from the internal AML interpreter
12606 during constant folding were not handled properly, causing a fault.
12608 Fixed a problem with overly aggressive range checking for the Stall
12609 operator. The valid range (max 255) is now only checked if the operand is
12611 type Integer. All other operand types cannot be statically checked.
12613 Fixed a problem where control method references within the RefOf,
12615 and ObjectType operators were not treated properly. They are now treated
12617 actual references, not method invocations.
12619 Fixed and enhanced the "list namespace" option (-ln). This option was
12621 a number of releases ago.
12623 Improved error handling for the Field, IndexField, and BankField
12625 The compiler now cleanly reports and recovers from errors in the field
12626 component (FieldUnit) list.
12628 Fixed a disassembler problem where the optional ResourceDescriptor fields
12629 TRS and TTP were not always handled correctly.
12631 Disassembler - Comments in output now use "//" instead of "/*"
12633 ----------------------------------------
12634 28 February 2005. Summary of changes for version 20050228:
12636 1) ACPI CA Core Subsystem:
12638 Fixed a problem where the result of an Index() operator (an object
12639 reference) must increment the reference count on the target object for
12641 life of the object reference.
12643 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
12644 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
12646 resource descriptors.
12648 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
12649 Space Descriptor" string, indicating interpreter support for the
12653 Implemented header support for the new ACPI 3.0 FADT flag bits.
12655 Implemented header support for the new ACPI 3.0 PCI Express bits for the
12657 status/enable registers.
12659 Updated header support for the MADT processor local Apic struct and MADT
12660 platform interrupt source struct for new ACPI 3.0 fields.
12662 Implemented header support for the SRAT and SLIT ACPI tables.
12664 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
12668 Code and Data Size: Current and previous core subsystem library sizes are
12669 shown below. These are the code and data sizes for the acpica.lib
12671 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12672 any ACPI driver or OSPM code. The debug version of the code includes the
12673 debug output trace mechanism and has a much larger code and data size.
12675 that these values will vary depending on the efficiency of the compiler
12677 the compiler options used during generation.
12680 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
12681 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
12683 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12684 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
12687 2) iASL Compiler/Disassembler:
12689 Fixed a problem with the internal 64-bit String-to-integer conversion
12691 strings less than two characters long.
12693 Fixed a problem with constant folding where the result of the Index()
12694 operator can not be considered a constant. This means that Index() cannot
12696 a type3 opcode and this will require an update to the ACPI specification.
12698 Disassembler: Implemented support for the TTP, MTP, and TRS resource
12699 descriptor fields. These fields were inadvertently ignored and not output
12701 the disassembly of the resource descriptor.
12704 ----------------------------------------
12705 11 February 2005. Summary of changes for version 20050211:
12707 1) ACPI CA Core Subsystem:
12709 Implemented ACPI 3.0 support for implicit conversion within the Match()
12710 operator. MatchObjects can now be of type integer, buffer, or string
12712 of just type integer. Package elements are implicitly converted to the
12714 of the MatchObject. This change aligns the behavior of Match() with the
12715 behavior of the other logical operators (LLess(), etc.) It also requires
12717 errata change to the ACPI specification as this support was intended for
12718 ACPI 3.0, but was inadvertently omitted.
12720 Fixed a problem with the internal implicit "to buffer" conversion.
12722 that are converted to buffers will cause buffer truncation if the string
12724 smaller than the target buffer. Integers that are converted to buffers
12726 not cause buffer truncation, only zero extension (both as per the ACPI
12727 spec.) The problem was introduced when code was added to truncate the
12728 buffer, but this should not be performed in all cases, only the string
12731 Fixed a problem with the Buffer and Package operators where the
12733 would get confused if two such operators were used as operands to an ASL
12734 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
12735 stack was not being popped after the execution of these operators,
12737 in an AE_NO_RETURN_VALUE exception.
12739 Fixed a problem with constructs of the form Store(Index(...),...). The
12740 reference object returned from Index was inadvertently resolved to an
12742 value. This problem was introduced in version 20050114 when the behavior
12744 Store() was modified to restrict the object types that can be used as the
12745 source operand (to match the ACPI specification.)
12747 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
12749 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
12751 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
12753 Code and Data Size: Current and previous core subsystem library sizes are
12754 shown below. These are the code and data sizes for the acpica.lib
12756 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12757 any ACPI driver or OSPM code. The debug version of the code includes the
12758 debug output trace mechanism and has a much larger code and data size.
12760 that these values will vary depending on the efficiency of the compiler
12762 the compiler options used during generation.
12765 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
12766 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
12768 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
12769 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
12772 2) iASL Compiler/Disassembler:
12774 Fixed a code generation problem in the constant folding optimization code
12775 where incorrect code was generated if a constant was reduced to a buffer
12776 object (i.e., a reduced type 5 opcode.)
12778 Fixed a typechecking problem for the ToBuffer operator. Caused by an
12779 incorrect return type in the internal opcode information table.
12781 ----------------------------------------
12782 25 January 2005. Summary of changes for version 20050125:
12784 1) ACPI CA Core Subsystem:
12786 Fixed a recently introduced problem with the Global Lock where the
12787 underlying semaphore was not created. This problem was introduced in
12788 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
12789 Acquire() operation on _GL.
12791 The local object cache is now optional, and is disabled by default. Both
12792 AcpiExec and the iASL compiler enable the cache because they run in user
12793 mode and this enhances their performance. #define
12794 ACPI_ENABLE_OBJECT_CACHE
12795 to enable the local cache.
12797 Fixed an issue in the internal function AcpiUtEvaluateObject concerning
12799 optional "implicit return" support where an error was returned if no
12801 object was expected, but one was implicitly returned. AE_OK is now
12803 in this case and the implicitly returned object is deleted.
12804 AcpiUtEvaluateObject is only occasionally used, and only to execute
12806 methods such as _STA and _INI where the return type is known up front.
12808 Fixed a few issues with the internal convert-to-integer code. It now
12810 an error if an attempt is made to convert a null string, a string of only
12811 blanks/tabs, or a zero-length buffer. This affects both implicit
12813 and explicit conversion via the ToInteger() operator.
12815 The internal debug code in AcpiUtAcquireMutex has been commented out. It
12817 not needed for normal operation and should increase the performance of
12819 entire subsystem. The code remains in case it is needed for debug
12823 The AcpiExec source and makefile are included in the Unix/Linux package
12827 Code and Data Size: Current and previous core subsystem library sizes are
12828 shown below. These are the code and data sizes for the acpica.lib
12830 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12831 any ACPI driver or OSPM code. The debug version of the code includes the
12832 debug output trace mechanism and has a much larger code and data size.
12834 that these values will vary depending on the efficiency of the compiler
12836 the compiler options used during generation.
12839 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
12840 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
12842 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
12843 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
12845 2) iASL Compiler/Disassembler:
12847 Switch/Case support: A warning is now issued if the type of the Switch
12849 cannot be determined at compile time. For example, Switch(Arg0) will
12850 generate the warning, and the type is assumed to be an integer. As per
12852 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
12856 Switch/Case support: Implemented support for buffer and string objects as
12857 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
12858 buffers and strings.
12860 Switch/Case support: The emitted code for the LEqual() comparisons now
12862 the switch value as the first operand, not the second. The case value is
12864 the second operand, and this allows the case value to be implicitly
12865 converted to the type of the switch value, not the other way around.
12867 Switch/Case support: Temporary variables are now emitted immediately
12869 the control method, not at the global level. This means that there are
12871 36 temps available per-method, not 36 temps per-module as was the case
12873 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
12875 ----------------------------------------
12876 14 January 2005. Summary of changes for version 20050114:
12878 Added 2005 copyright to all module headers. This affects every module in
12879 the core subsystem, iASL compiler, and the utilities.
12881 1) ACPI CA Core Subsystem:
12883 Fixed an issue with the String-to-Buffer conversion code where the string
12884 null terminator was not included in the buffer after conversion, but
12886 is existing ASL that assumes the string null terminator is included. This
12888 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
12889 introduced in the previous version when the code was updated to correctly
12890 set the converted buffer size as per the ACPI specification. The ACPI
12892 is ambiguous and will be updated to specify that the null terminator must
12894 included in the converted buffer. This also affects the ToBuffer() ASL
12897 Fixed a problem with the Mid() ASL/AML operator where it did not work
12898 correctly on Buffer objects. Newly created sub-buffers were not being
12903 Fixed a problem in AcpiTbFindTable where incorrect string compares were
12904 performed on the OemId and OemTableId table header fields. These fields
12906 not null terminated, so strncmp is now used instead of strcmp.
12908 Implemented a restriction on the Store() ASL/AML operator to align the
12909 behavior with the ACPI specification. Previously, any object could be
12911 as the source operand. Now, the only objects that may be used are
12913 Buffers, Strings, Packages, Object References, and DDB Handles. If
12914 necessary, the original behavior can be restored by enabling the
12915 EnableInterpreterSlack flag.
12917 Enhanced the optional "implicit return" support to allow an implicit
12919 value from methods that are invoked externally via the AcpiEvaluateObject
12920 interface. This enables implicit returns from the _STA and _INI methods,
12923 Changed the Revision() ASL/AML operator to return the current version of
12925 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
12927 the supported ACPI version (This is the function of the _REV method).
12929 Updated the _REV predefined method to return the currently supported
12933 Implemented batch mode option for the AcpiExec utility (-b).
12935 Code and Data Size: Current and previous core subsystem library sizes are
12936 shown below. These are the code and data sizes for the acpica.lib
12938 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12939 any ACPI driver or OSPM code. The debug version of the code includes the
12940 debug output trace mechanism and has a much larger code and data size.
12942 that these values will vary depending on the efficiency of the compiler
12944 the compiler options used during generation.
12947 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12948 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
12950 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
12951 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
12953 ----------------------------------------
12954 10 December 2004. Summary of changes for version 20041210:
12956 ACPI 3.0 support is nearing completion in both the iASL compiler and the
12957 ACPI CA core subsystem.
12959 1) ACPI CA Core Subsystem:
12961 Fixed a problem in the ToDecimalString operator where the resulting
12963 length was incorrectly calculated. The length is now calculated exactly,
12964 eliminating incorrect AE_STRING_LIMIT exceptions.
12966 Fixed a problem in the ToHexString operator to allow a maximum 200
12968 string to be produced.
12970 Fixed a problem in the internal string-to-buffer and buffer-to-buffer
12972 routine where the length of the resulting buffer was not truncated to the
12973 new size (if the target buffer already existed).
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: 78.3K Code, 11.5K Data, 89.8K Total
12988 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
12990 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
12991 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
12994 2) iASL Compiler/Disassembler:
12996 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
12997 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
12998 Includes support in the disassembler.
13000 Implemented support for the new (ACPI 3.0) parameter to the Register
13004 Fixed a problem where the _HE resource name for the Interrupt macro was
13005 referencing bit 0 instead of bit 1.
13007 Implemented check for maximum 255 interrupts in the Interrupt macro.
13009 Fixed a problem with the predefined resource descriptor names where
13010 incorrect AML code was generated if the offset within the resource buffer
13011 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
13012 but did not update the surrounding package lengths.
13014 Changes to the Dma macro: All channels within the channel list must be
13016 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
13017 optional (default is BusMaster).
13019 Implemented check for maximum 7 data bytes for the VendorShort macro.
13021 The ReadWrite parameter is now optional for the Memory32 and similar
13024 ----------------------------------------
13025 03 December 2004. Summary of changes for version 20041203:
13027 1) ACPI CA Core Subsystem:
13029 The low-level field insertion/extraction code (exfldio) has been
13031 rewritten to eliminate unnecessary complexity, bugs, and boundary
13034 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
13036 operators where the input operand could be inadvertently deleted if no
13037 conversion was necessary (e.g., if the input to ToInteger was an Integer
13040 Fixed a problem with the ToDecimalString and ToHexString where an
13042 exception code was returned if the resulting string would be > 200 chars.
13043 AE_STRING_LIMIT is now returned.
13045 Fixed a problem with the Concatenate operator where AE_OK was always
13046 returned, even if the operation failed.
13048 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
13049 semaphores to be allocated.
13051 Code and Data Size: Current and previous core subsystem library sizes are
13052 shown below. These are the code and data sizes for the acpica.lib
13054 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13055 any ACPI driver or OSPM code. The debug version of the code includes the
13056 debug output trace mechanism and has a much larger code and data size.
13058 that these values will vary depending on the efficiency of the compiler
13060 the compiler options used during generation.
13063 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13064 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13066 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
13067 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
13070 2) iASL Compiler/Disassembler:
13072 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
13073 recently introduced in 20041119.
13075 Fixed a problem with the ToUUID macro where the upper nybble of each
13077 byte was inadvertently set to zero.
13079 ----------------------------------------
13080 19 November 2004. Summary of changes for version 20041119:
13082 1) ACPI CA Core Subsystem:
13084 Fixed a problem in the internal ConvertToInteger routine where new
13086 were not truncated to 32 bits for 32-bit ACPI tables. This routine
13088 buffers and strings to integers.
13090 Implemented support to store a value to an Index() on a String object.
13092 is an ACPI 2.0 feature that had not yet been implemented.
13094 Implemented new behavior for storing objects to individual package
13096 (via the Index() operator). The previous behavior was to invoke the
13098 conversion rules if an object was already present at the index. The new
13099 behavior is to simply delete any existing object and directly store the
13101 object. Although the ACPI specification seems unclear on this subject,
13103 ACPI implementations behave in this manner. (This is the root of the
13104 AE_BAD_HEX_CONSTANT issue.)
13106 Modified the RSDP memory scan mechanism to support the extended checksum
13108 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
13109 RSDP signature is found with a valid checksum.
13111 Code and Data Size: Current and previous core subsystem library sizes are
13112 shown below. These are the code and data sizes for the acpica.lib
13114 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13115 any ACPI driver or OSPM code. The debug version of the code includes the
13116 debug output trace mechanism and has a much larger code and data size.
13118 that these values will vary depending on the efficiency of the compiler
13120 the compiler options used during generation.
13123 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13124 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13126 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13127 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13130 2) iASL Compiler/Disassembler:
13132 Fixed a missing semicolon in the aslcompiler.y file.
13134 ----------------------------------------
13135 05 November 2004. Summary of changes for version 20041105:
13137 1) ACPI CA Core Subsystem:
13139 Implemented support for FADT revision 2. This was an interim table
13141 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
13143 Implemented optional support to allow uninitialized LocalX and ArgX
13144 variables in a control method. The variables are initialized to an
13146 object with a value of zero. This support is enabled by setting the
13147 AcpiGbl_EnableInterpreterSlack flag to TRUE.
13149 Implemented support for Integer objects for the SizeOf operator. Either
13151 or 8 is returned, depending on the current integer size (32-bit or 64-
13153 depending on the parent table revision).
13155 Fixed a problem in the implementation of the SizeOf and ObjectType
13157 where the operand was resolved to a value too early, causing incorrect
13158 return values for some objects.
13160 Fixed some possible memory leaks during exceptional conditions.
13162 Code and Data Size: Current and previous core subsystem library sizes are
13163 shown below. These are the code and data sizes for the acpica.lib
13165 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13166 any ACPI driver or OSPM code. The debug version of the code includes the
13167 debug output trace mechanism and has a much larger code and data size.
13169 that these values will vary depending on the efficiency of the compiler
13171 the compiler options used during generation.
13174 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13175 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
13177 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
13178 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
13181 2) iASL Compiler/Disassembler:
13183 Implemented support for all ACPI 3.0 reserved names and methods.
13185 Implemented all ACPI 3.0 grammar elements in the front-end, including
13186 support for semicolons.
13188 Implemented the ACPI 3.0 Function() and ToUUID() macros
13190 Fixed a problem in the disassembler where a Scope() operator would not be
13191 emitted properly if the target of the scope was in another table.
13193 ----------------------------------------
13194 15 October 2004. Summary of changes for version 20041015:
13196 Note: ACPI CA is currently undergoing an in-depth and complete formal
13197 evaluation to test/verify the following areas. Other suggestions are
13198 welcome. This will result in an increase in the frequency of releases and
13199 the number of bug fixes in the next few months.
13200 - Functional tests for all ASL/AML operators
13201 - All implicit/explicit type conversions
13202 - Bit fields and operation regions
13203 - 64-bit math support and 32-bit-only "truncated" math support
13204 - Exceptional conditions, both compiler and interpreter
13205 - Dynamic object deletion and memory leaks
13206 - ACPI 3.0 support when implemented
13207 - External interfaces to the ACPI subsystem
13210 1) ACPI CA Core Subsystem:
13212 Fixed two alignment issues on 64-bit platforms - within debug statements
13214 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
13216 field within the non-aligned ACPI generic address structure.
13218 Fixed a problem in the Increment and Decrement operators where incorrect
13219 operand resolution could result in the inadvertent modification of the
13220 original integer when the integer is passed into another method as an
13221 argument and the arg is then incremented/decremented.
13223 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
13225 BCD number were truncated during conversion.
13227 Fixed a problem in the ToDecimal operator where the length of the
13229 string could be set incorrectly too long if the input operand was a
13233 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
13235 within a buffer would prematurely terminate a compare between buffer
13238 Added a check for string overflow (>200 characters as per the ACPI
13239 specification) during the Concatenate operator with two string operands.
13241 Code and Data Size: Current and previous core subsystem library sizes are
13242 shown below. These are the code and data sizes for the acpica.lib
13244 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13245 any ACPI driver or OSPM code. The debug version of the code includes the
13246 debug output trace mechanism and has a much larger code and data size.
13248 that these values will vary depending on the efficiency of the compiler
13250 the compiler options used during generation.
13253 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13254 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
13256 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13257 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
13261 2) iASL Compiler/Disassembler:
13263 Allow the use of the ObjectType operator on uninitialized Locals and Args
13264 (returns 0 as per the ACPI specification).
13266 Fixed a problem where the compiler would fault if there was a syntax
13268 in the FieldName of all of the various CreateXXXField operators.
13270 Disallow the use of lower case letters within the EISAID macro, as per
13272 ACPI specification. All EISAID strings must be of the form "UUUNNNN"
13274 U is an uppercase letter and N is a hex digit.
13277 ----------------------------------------
13278 06 October 2004. Summary of changes for version 20041006:
13280 1) ACPI CA Core Subsystem:
13282 Implemented support for the ACPI 3.0 Timer operator. This ASL function
13283 implements a 64-bit timer with 100 nanosecond granularity.
13285 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
13286 implement the ACPI 3.0 Timer operator. This allows the host OS to
13288 the timer with the best clock available. Also, it keeps the core
13290 out of the clock handling business, since the host OS (usually) performs
13293 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
13294 functions use a 64-bit address which is part of the packed ACPI Generic
13295 Address Structure. Since the structure is non-aligned, the alignment
13297 are now used to extract the address to a local variable before use.
13299 Fixed a problem where the ToInteger operator assumed all input strings
13301 hexadecimal. The operator now handles both decimal strings and hex
13303 (prefixed with "0x").
13305 Fixed a problem where the string length in the string object created as a
13306 result of the internal ConvertToString procedure could be incorrect. This
13307 potentially affected all implicit conversions and also the
13309 and ToHexString operators.
13311 Fixed two problems in the ToString operator. If the length parameter was
13312 zero, an incorrect string object was created and the value of the input
13313 length parameter was inadvertently changed from zero to Ones.
13315 Fixed a problem where the optional ResourceSource string in the
13317 resource macro was ignored.
13319 Simplified the interfaces to the internal division functions, reducing
13321 size and complexity.
13323 Code and Data Size: Current and previous core subsystem library sizes are
13324 shown below. These are the code and data sizes for the acpica.lib
13326 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13327 any ACPI driver or OSPM code. The debug version of the code includes the
13328 debug output trace mechanism and has a much larger code and data size.
13330 that these values will vary depending on the efficiency of the compiler
13332 the compiler options used during generation.
13335 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
13336 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
13338 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13339 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
13342 2) iASL Compiler/Disassembler:
13344 Implemented support for the ACPI 3.0 Timer operator.
13346 Fixed a problem where the Default() operator was inadvertently ignored in
13348 Switch/Case block. This was a problem in the translation of the Switch
13349 statement to If...Else pairs.
13351 Added support to allow a standalone Return operator, with no parentheses
13355 Fixed a problem with code generation for the ElseIf operator where the
13356 translated Else...If parse tree was improperly constructed leading to the
13359 ----------------------------------------
13360 22 September 2004. Summary of changes for version 20040922:
13362 1) ACPI CA Core Subsystem:
13364 Fixed a problem with the implementation of the LNot() operator where
13366 was not returned for the TRUE case. Changed the code to return Ones
13368 of (!Arg) which was usually 1. This change affects iASL constant folding
13370 this operator also.
13372 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was
13374 initialized properly -- Now zero the entire buffer in this case where the
13375 buffer already exists.
13377 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
13378 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
13379 related code considerably. This will require changes/updates to all OS
13380 interface layers (OSLs.)
13382 Implemented a new external interface, AcpiInstallExceptionHandler, to
13384 a system exception handler to be installed. This handler is invoked upon
13386 run-time exception that occurs during control method execution.
13388 Added support for the DSDT in AcpiTbFindTable. This allows the
13389 DataTableRegion() operator to access the local copy of the DSDT.
13391 Code and Data Size: Current and previous core subsystem library sizes are
13392 shown below. These are the code and data sizes for the acpica.lib
13394 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13395 any ACPI driver or OSPM code. The debug version of the code includes the
13396 debug output trace mechanism and has a much larger code and data size.
13398 that these values will vary depending on the efficiency of the compiler
13400 the compiler options used during generation.
13403 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
13404 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
13406 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
13407 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
13410 2) iASL Compiler/Disassembler:
13412 Fixed a problem with constant folding and the LNot operator. LNot was
13413 returning 1 in the TRUE case, not Ones as per the ACPI specification.
13415 could result in the generation of an incorrect folded/reduced constant.
13417 End-Of-File is now allowed within a "//"-style comment. A parse error no
13418 longer occurs if such a comment is at the very end of the input ASL
13422 Implemented the "-r" option to override the Revision in the table header.
13423 The initial use of this option will be to simplify the evaluation of the
13425 interpreter by allowing a single ASL source module to be compiled for
13427 32-bit or 64-bit integers.
13430 ----------------------------------------
13431 27 August 2004. Summary of changes for version 20040827:
13433 1) ACPI CA Core Subsystem:
13435 - Implemented support for implicit object conversion in the non-numeric
13436 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual,
13438 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
13439 the second operand is implicitly converted on the fly to match the type
13441 the first operand. For example:
13443 LEqual (Source1, Source2)
13445 Source1 and Source2 must each evaluate to an integer, a string, or a
13447 The data type of Source1 dictates the required type of Source2. Source2
13449 implicitly converted if necessary to match the type of Source1.
13451 - Updated and corrected the behavior of the string conversion support.
13453 rules concerning conversion of buffers to strings (according to the ACPI
13454 specification) are as follows:
13456 ToDecimalString - explicit byte-wise conversion of buffer to string of
13457 decimal values (0-255) separated by commas. ToHexString - explicit byte-
13459 conversion of buffer to string of hex values (0-FF) separated by commas.
13460 ToString - explicit byte-wise conversion of buffer to string. Byte-by-
13462 copy with no transform except NULL terminated. Any other implicit buffer-
13464 string conversion - byte-wise conversion of buffer to string of hex
13466 (0-FF) separated by spaces.
13468 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
13470 - Fixed a problem in AcpiNsGetPathnameLength where the returned length
13472 one byte too short in the case of a node in the root scope. This could
13473 cause a fault during debug output.
13475 - Code and Data Size: Current and previous core subsystem library sizes
13477 shown below. These are the code and data sizes for the acpica.lib
13479 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13480 any ACPI driver or OSPM code. The debug version of the code includes the
13481 debug output trace mechanism and has a much larger code and data size.
13483 that these values will vary depending on the efficiency of the compiler
13485 the compiler options used during generation.
13488 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
13489 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
13491 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
13492 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
13495 2) iASL Compiler/Disassembler:
13497 - Fixed a Linux generation error.
13500 ----------------------------------------
13501 16 August 2004. Summary of changes for version 20040816:
13503 1) ACPI CA Core Subsystem:
13505 Designed and implemented support within the AML interpreter for the so-
13506 called "implicit return". This support returns the result of the last
13508 operation within a control method, in the absence of an explicit Return()
13509 operator. A few machines depend on this behavior, even though it is not
13510 explicitly supported by the ASL language. It is optional support that
13512 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
13514 Removed support for the PCI_Config address space from the internal low
13516 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
13517 support was not used internally, and would not work correctly anyway
13519 the PCI bus number and segment number were not supported. There are
13520 separate interfaces for PCI configuration space access because of the
13524 Code and Data Size: Current and previous core subsystem library sizes are
13525 shown below. These are the code and data sizes for the acpica.lib
13527 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13528 any ACPI driver or OSPM code. The debug version of the code includes the
13529 debug output trace mechanism and has a much larger code and data size.
13531 that these values will vary depending on the efficiency of the compiler
13533 the compiler options used during generation.
13536 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13537 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
13539 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
13540 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
13543 2) iASL Compiler/Disassembler:
13545 Fixed a problem where constants in ASL expressions at the root level (not
13546 within a control method) could be inadvertently truncated during code
13547 generation. This problem was introduced in the 20040715 release.
13550 ----------------------------------------
13551 15 July 2004. Summary of changes for version 20040715:
13553 1) ACPI CA Core Subsystem:
13555 Restructured the internal HW GPE interfaces to pass/track the current
13557 of interrupts (enabled/disabled) in order to avoid possible deadlock and
13558 increase flexibility of the interfaces.
13560 Implemented a "lexicographical compare" for String and Buffer objects
13562 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual -
13564 as per further clarification to the ACPI specification. Behavior is
13566 to C library "strcmp".
13568 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
13569 external function. In the 32-bit non-debug case, the stack use has been
13570 reduced from 168 bytes to 32 bytes.
13572 Deployed a new run-time configuration flag,
13573 AcpiGbl_EnableInterpreterSlack,
13574 whose purpose is to allow the AML interpreter to forgive certain bad AML
13575 constructs. Default setting is FALSE.
13577 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field
13579 support code. If enabled, it allows field access to go beyond the end of
13581 region definition if the field is within the region length rounded up to
13583 next access width boundary (a common coding error.)
13585 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
13586 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also,
13588 symbols are lowercased by the latest version of the AcpiSrc tool.
13590 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
13591 rename "Register" to simply "Reg" to prevent certain compilers from
13594 Code and Data Size: Current and previous core subsystem library sizes are
13595 shown below. These are the code and data sizes for the acpica.lib
13597 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13598 any ACPI driver or OSPM code. The debug version of the code includes the
13599 debug output trace mechanism and has a much larger code and data size.
13601 that these values will vary depending on the efficiency of the compiler
13603 the compiler options used during generation.
13606 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13607 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
13609 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
13610 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
13613 2) iASL Compiler/Disassembler:
13615 Implemented full support for Package objects within the Case() operator.
13616 Note: The Break() operator is currently not supported within Case blocks
13617 (TermLists) as there is some question about backward compatibility with
13622 Fixed a problem where complex terms were not supported properly within
13626 Eliminated extraneous warning for compiler-emitted reserved names of the
13627 form "_T_x". (Used in Switch/Case operators.)
13629 Eliminated optimization messages for "_T_x" objects and small constants
13630 within the DefinitionBlock operator.
13633 ----------------------------------------
13634 15 June 2004. Summary of changes for version 20040615:
13636 1) ACPI CA Core Subsystem:
13638 Implemented support for Buffer and String objects (as per ACPI 2.0) for
13640 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
13643 All directory names in the entire source package are lower case, as they
13644 were in earlier releases.
13646 Implemented "Disassemble" command in the AML debugger that will
13648 a single control method.
13650 Code and Data Size: Current and previous core subsystem library sizes are
13651 shown below. These are the code and data sizes for the acpica.lib
13653 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13654 any ACPI driver or OSPM code. The debug version of the code includes the
13655 debug output trace mechanism and has a much larger code and data size.
13657 that these values will vary depending on the efficiency of the compiler
13659 the compiler options used during generation.
13662 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
13663 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
13666 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
13667 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
13670 2) iASL Compiler/Disassembler:
13672 Implemented support for Buffer and String objects (as per ACPI 2.0) for
13674 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
13677 All directory names in the entire source package are lower case, as they
13678 were in earlier releases.
13680 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
13683 Fixed an issue with the Windows version of the compiler where later
13685 of Windows place the FADT in the registry under the name "FADT" and not
13686 "FACP" as earlier versions did. This applies when using the -g or -
13687 d<nofilename> options. The compiler now looks for both strings as
13690 Fixed a problem with compiler namepath optimization where a namepath
13692 the Scope() operator could not be optimized if the namepath was a subpath
13694 the current scope path.
13696 ----------------------------------------
13697 27 May 2004. Summary of changes for version 20040527:
13699 1) ACPI CA Core Subsystem:
13701 Completed a new design and implementation for EBDA (Extended BIOS Data
13703 support in the RSDP scan code. The original code improperly scanned for
13705 EBDA by simply scanning from memory location 0 to 0x400. The correct
13707 is to first obtain the EBDA pointer from within the BIOS data area, then
13708 scan 1K of memory starting at the EBDA pointer. There appear to be few
13710 any machines that place the RSDP in the EBDA, however.
13712 Integrated a fix for a possible fault during evaluation of BufferField
13713 arguments. Obsolete code that was causing the problem was removed.
13715 Found and fixed a problem in the Field Support Code where data could be
13716 corrupted on a bit field read that starts on an aligned boundary but does
13717 not end on an aligned boundary. Merged the read/write "datum length"
13718 calculation code into a common procedure.
13720 Rolled in a couple of changes to the FreeBSD-specific header.
13723 Code and Data Size: Current and previous core subsystem library sizes are
13724 shown below. These are the code and data sizes for the acpica.lib
13726 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13727 any ACPI driver or OSPM code. The debug version of the code includes the
13728 debug output trace mechanism and has a much larger code and data size.
13730 that these values will vary depending on the efficiency of the compiler
13732 the compiler options used during generation.
13735 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13736 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
13738 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
13739 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
13742 2) iASL Compiler/Disassembler:
13744 Fixed a generation warning produced by some overly-verbose compilers for
13748 ----------------------------------------
13749 14 May 2004. Summary of changes for version 20040514:
13751 1) ACPI CA Core Subsystem:
13753 Fixed a problem where hardware GPE enable bits sometimes not set properly
13754 during and after GPE method execution. Result of 04/27 changes.
13756 Removed extra "clear all GPEs" when sleeping/waking.
13758 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
13759 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above
13761 the new AcpiEv* calls as appropriate.
13763 ACPI_OS_NAME was removed from the OS-specific headers. The default name
13765 now "Microsoft Windows NT" for maximum compatibility. However this can
13767 changed by modifying the acconfig.h file.
13769 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
13770 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
13772 Run _INI methods on ThermalZone objects. This is against the ACPI
13773 specification, but there is apparently ASL code in the field that has
13775 _INI methods, and apparently "other" AML interpreters execute them.
13777 Performed a full 16/32/64 bit lint that resulted in some small changes.
13779 Added a sleep simulation command to the AML debugger to test sleep code.
13781 Code and Data Size: Current and previous core subsystem library sizes are
13782 shown below. These are the code and data sizes for the acpica.lib
13784 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13785 any ACPI driver or OSPM code. The debug version of the code includes the
13786 debug output trace mechanism and has a much larger code and data size.
13788 that these values will vary depending on the efficiency of the compiler
13790 the compiler options used during generation.
13793 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13794 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
13796 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13797 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
13799 ----------------------------------------
13800 27 April 2004. Summary of changes for version 20040427:
13802 1) ACPI CA Core Subsystem:
13804 Completed a major overhaul of the GPE handling within ACPI CA. There are
13805 now three types of GPEs: wake-only, runtime-only, and combination
13807 The only GPEs allowed to be combination wake/run are for button-style
13808 devices such as a control-method power button, control-method sleep
13810 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are
13812 referenced by any _PRW methods are marked for "runtime" and hardware
13813 enabled. Any GPE that is referenced by a _PRW method is marked for
13815 (and disabled at runtime). However, at sleep time, only those GPEs that
13816 have been specifically enabled for wake via the AcpiEnableGpe interface
13818 actually be hardware enabled.
13820 A new external interface has been added, AcpiSetGpeType(), that is meant
13822 be used by device drivers to force a GPE to a particular type. It will
13824 especially useful for the drivers for the button devices mentioned above.
13826 Completed restructuring of the ACPI CA initialization sequence so that
13827 default operation region handlers are installed before GPEs are
13829 and the _PRW methods are executed. This will prevent errors when the
13831 methods attempt to access system memory or I/O space.
13833 GPE enable/disable no longer reads the GPE enable register. We now keep
13835 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
13836 thus no longer depend on the hardware to maintain these bits.
13838 Always clear the wake status and fixed/GPE status bits before sleep, even
13841 Improved the AML debugger output for displaying the GPE blocks and their
13844 Added new strings for the _OSI method, of the form "Windows 2001 SPx"
13848 Fixed a problem where the physical address was incorrectly calculated
13850 the Load() operator was used to directly load from an Operation Region
13852 loading from a Field object.) Also added check for minimum table length
13856 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
13859 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
13860 consistency with the other fields returned.
13862 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
13863 structure for each GPE in the system, so the size of this structure is
13866 CPU stack requirement reduction: Cleaned up the method execution and
13868 evaluation paths so that now a parameter structure is passed, instead of
13869 copying the various method parameters over and over again.
13871 In evregion.c: Correctly exit and reenter the interpreter region if and
13872 only if dispatching an operation region request to a user-installed
13874 Do not exit/reenter when dispatching to a default handler (e.g., default
13875 system memory or I/O handlers)
13878 Notes for updating drivers for the new GPE support. The following
13880 must be made to ACPI-related device drivers that are attached to one or
13882 GPEs: (This information will be added to the ACPI CA Programmer
13885 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you
13887 explicitly call AcpiEnableGpe.
13888 2) There is a new interface called AcpiSetGpeType. This should be called
13889 before enabling the GPE. Also, this interface will automatically disable
13890 the GPE if it is currently enabled.
13891 3) AcpiEnableGpe no longer supports a GPE type flag.
13893 Specific drivers that must be changed:
13895 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
13896 AeGpeHandler, NULL);
13897 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
13898 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
13900 2) Button Drivers (Power, Lid, Sleep):
13901 Run _PRW method under parent device
13902 If _PRW exists: /* This is a control-method button */
13903 Extract GPE number and possibly GpeDevice
13904 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
13905 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
13907 For all other devices that have _PRWs, we automatically set the GPE type
13909 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled.
13911 must be done on a selective basis, usually requiring some kind of user
13913 to allow the user to pick the wake devices.
13916 Code and Data Size: Current and previous core subsystem library sizes are
13917 shown below. These are the code and data sizes for the acpica.lib
13919 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13920 any ACPI driver or OSPM code. The debug version of the code includes the
13921 debug output trace mechanism and has a much larger code and data size.
13923 that these values will vary depending on the efficiency of the compiler
13925 the compiler options used during generation.
13928 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
13929 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
13932 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
13933 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
13937 ----------------------------------------
13938 02 April 2004. Summary of changes for version 20040402:
13940 1) ACPI CA Core Subsystem:
13942 Fixed an interpreter problem where an indirect store through an ArgX
13943 parameter was incorrectly applying the "implicit conversion rules" during
13944 the store. From the ACPI specification: "If the target is a method local
13946 argument (LocalX or ArgX), no conversion is performed and the result is
13947 stored directly to the target". The new behavior is to disable implicit
13948 conversion during ALL stores to an ArgX.
13950 Changed the behavior of the _PRW method scan to ignore any and all errors
13951 returned by a given _PRW. This prevents the scan from aborting from the
13952 failure of any single _PRW.
13954 Moved the runtime configuration parameters from the global init procedure
13956 static variables in acglobal.h. This will allow the host to override the
13957 default values easily.
13959 Code and Data Size: Current and previous core subsystem library sizes are
13960 shown below. These are the code and data sizes for the acpica.lib
13962 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13963 any ACPI driver or OSPM code. The debug version of the code includes the
13964 debug output trace mechanism and has a much larger code and data size.
13966 that these values will vary depending on the efficiency of the compiler
13968 the compiler options used during generation.
13971 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
13972 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
13974 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
13975 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
13978 2) iASL Compiler/Disassembler:
13980 iASL now fully disassembles SSDTs. However, External() statements are
13982 generated automatically for unresolved symbols at this time. This is a
13983 planned feature for future implementation.
13985 Fixed a scoping problem in the disassembler that occurs when the type of
13987 target of a Scope() operator is overridden. This problem caused an
13988 incorrectly nested internal namespace to be constructed.
13990 Any warnings or errors that are emitted during disassembly are now
13992 out automatically so that the resulting file can be recompiled without
13996 ----------------------------------------
13997 26 March 2004. Summary of changes for version 20040326:
13999 1) ACPI CA Core Subsystem:
14001 Implemented support for "wake" GPEs via interaction between GPEs and the
14002 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
14003 identified as a WAKE GPE and by default will no longer be enabled at
14004 runtime. Previously, we were blindly enabling all GPEs with a
14006 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.
14008 believe this has been the cause of thousands of "spurious" GPEs on some
14011 This new GPE behavior is can be reverted to the original behavior (enable
14012 ALL GPEs at runtime) via a runtime flag.
14014 Fixed a problem where aliased control methods could not access objects
14015 properly. The proper scope within the namespace was not initialized
14016 (transferred to the target of the aliased method) before executing the
14019 Fixed a potential race condition on internal object deletion on the
14021 object in AcpiEvaluateObject.
14023 Integrated a fix for resource descriptors where both _MEM and _MTP were
14024 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
14025 wide, 0x0F instead of 0x03.)
14027 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName,
14030 fault in some cases.
14032 Updated Notify() values for debug statements in evmisc.c
14034 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
14036 Code and Data Size: Current and previous core subsystem library sizes are
14037 shown below. These are the code and data sizes for the acpica.lib
14039 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14040 any ACPI driver or OSPM code. The debug version of the code includes the
14041 debug output trace mechanism and has a much larger code and data size.
14043 that these values will vary depending on the efficiency of the compiler
14045 the compiler options used during generation.
14049 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
14050 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
14052 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
14053 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
14055 ----------------------------------------
14056 11 March 2004. Summary of changes for version 20040311:
14058 1) ACPI CA Core Subsystem:
14060 Fixed a problem where errors occurring during the parse phase of control
14061 method execution did not abort cleanly. For example, objects created and
14062 installed in the namespace were not deleted. This caused all subsequent
14063 invocations of the method to return the AE_ALREADY_EXISTS exception.
14065 Implemented a mechanism to force a control method to "Serialized"
14067 if the method attempts to create namespace objects. (The root of the
14068 AE_ALREADY_EXISTS problem.)
14070 Implemented support for the predefined _OSI "internal" control method.
14071 Initial supported strings are "Linux", "Windows 2000", "Windows 2001",
14073 "Windows 2001.1", and can be easily upgraded for new strings as
14075 This feature will allow "other" operating systems to execute the fully
14076 tested, "Windows" code path through the ASL code
14078 Global Lock Support: Now allows multiple acquires and releases with any
14079 internal thread. Removed concept of "owning thread" for this special
14082 Fixed two functions that were inappropriately declaring large objects on
14084 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage
14086 method execution considerably.
14088 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
14089 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
14091 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
14092 defined on the machine.
14094 Implemented two runtime options: One to force all control method
14096 to "Serialized" to mimic Windows behavior, another to disable _OSI
14098 if it causes problems on a given machine.
14100 Code and Data Size: Current and previous core subsystem library sizes are
14101 shown below. These are the code and data sizes for the acpica.lib
14103 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14104 any ACPI driver or OSPM code. The debug version of the code includes the
14105 debug output trace mechanism and has a much larger code and data size.
14107 that these values will vary depending on the efficiency of the compiler
14109 the compiler options used during generation.
14112 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
14113 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
14115 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
14116 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
14118 2) iASL Compiler/Disassembler:
14120 Fixed an array size problem for FreeBSD that would cause the compiler to
14123 ----------------------------------------
14124 20 February 2004. Summary of changes for version 20040220:
14127 1) ACPI CA Core Subsystem:
14129 Implemented execution of _SxD methods for Device objects in the
14130 GetObjectInfo interface.
14132 Fixed calls to _SST method to pass the correct arguments.
14134 Added a call to _SST on wake to restore to "working" state.
14136 Check for End-Of-Buffer failure case in the WalkResources interface.
14138 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
14139 structures to the beginning of the file.
14141 After wake, clear GPE status register(s) before enabling GPEs.
14143 After wake, clear/enable power button. (Perhaps we should clear/enable
14145 fixed events upon wake.)
14147 Fixed a couple of possible memory leaks in the Namespace manager.
14149 Integrated latest acnetbsd.h file.
14151 ----------------------------------------
14152 11 February 2004. Summary of changes for version 20040211:
14155 1) ACPI CA Core Subsystem:
14157 Completed investigation and implementation of the call-by-reference
14158 mechanism for control method arguments.
14160 Fixed a problem where a store of an object into an indexed package could
14161 fail if the store occurs within a different method than the method that
14162 created the package.
14164 Fixed a problem where the ToDecimal operator could return incorrect
14167 Fixed a problem where the CopyObject operator could fail on some of the
14169 obscure objects (e.g., Reference objects.)
14171 Improved the output of the Debug object to display buffer, package, and
14174 Fixed a problem where constructs of the form "RefOf (ArgX)" did not
14176 the expected result.
14178 Added permanent ACPI_REPORT_ERROR macros for all instances of the
14179 ACPI_AML_INTERNAL exception.
14181 Integrated latest version of acfreebsd.h
14183 ----------------------------------------
14184 16 January 2004. Summary of changes for version 20040116:
14186 The purpose of this release is primarily to update the copyright years in
14187 each module, thus causing a huge number of diffs. There are a few small
14188 functional changes, however.
14190 1) ACPI CA Core Subsystem:
14192 Improved error messages when there is a problem finding one or more of
14194 required base ACPI tables
14196 Reintroduced the definition of APIC_HEADER in actbl.h
14198 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
14200 Removed extraneous reference to NewObj in dsmthdat.c
14204 Fixed a problem introduced in December that disabled the correct
14206 of Resource Templates
14209 ----------------------------------------
14210 03 December 2003. Summary of changes for version 20031203:
14212 1) ACPI CA Core Subsystem:
14214 Changed the initialization of Operation Regions during subsystem
14215 init to perform two entire walks of the ACPI namespace; The first
14216 to initialize the regions themselves, the second to execute the
14217 _REG methods. This fixed some interdependencies across _REG
14218 methods found on some machines.
14220 Fixed a problem where a Store(Local0, Local1) could simply update
14221 the object reference count, and not create a new copy of the
14222 object if the Local1 is uninitialized.
14224 Implemented support for the _SST reserved method during sleep
14227 Implemented support to clear the SLP_TYP and SLP_EN bits when
14228 waking up, this is apparently required by some machines.
14230 When sleeping, clear the wake status only if SleepState is not S5.
14232 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
14233 pointer arithmetic advanced a string pointer too far.
14235 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
14236 could be returned if the requested table has not been loaded.
14238 Within the support for IRQ resources, restructured the handling of
14239 the active and edge/level bits.
14241 Fixed a few problems in AcpiPsxExecute() where memory could be
14242 leaked under certain error conditions.
14244 Improved error messages for the cases where the ACPI mode could
14247 Code and Data Size: Current and previous core subsystem library
14248 sizes are shown below. These are the code and data sizes for the
14249 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14250 these values do not include any ACPI driver or OSPM code. The
14251 debug version of the code includes the debug output trace
14252 mechanism and has a much larger code and data size. Note that
14253 these values will vary depending on the efficiency of the compiler
14254 and the compiler options used during generation.
14256 Previous Release (20031029):
14257 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
14258 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
14260 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
14261 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
14263 2) iASL Compiler/Disassembler:
14265 Implemented a fix for the iASL disassembler where a bad index was
14266 generated. This was most noticeable on 64-bit platforms
14269 ----------------------------------------
14270 29 October 2003. Summary of changes for version 20031029:
14272 1) ACPI CA Core Subsystem:
14275 Fixed a problem where a level-triggered GPE with an associated
14276 _Lxx control method was incorrectly cleared twice.
14278 Fixed a problem with the Field support code where an access can
14279 occur beyond the end-of-region if the field is non-aligned but
14280 extends to the very end of the parent region (resulted in an
14281 AE_AML_REGION_LIMIT exception.)
14283 Fixed a problem with ACPI Fixed Events where an RT Clock handler
14284 would not get invoked on an RTC event. The RTC event bitmasks for
14285 the PM1 registers were not being initialized properly.
14287 Implemented support for executing _STA and _INI methods for
14288 Processor objects. Although this is currently not part of the
14289 ACPI specification, there is existing ASL code that depends on the
14290 init-time execution of these methods.
14292 Implemented and deployed a GetDescriptorName function to decode
14293 the various types of internal descriptors. Guards against null
14294 descriptors during debug output also.
14296 Implemented and deployed a GetNodeName function to extract the 4-
14297 character namespace node name. This function simplifies the debug
14298 and error output, as well as guarding against null pointers during
14301 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
14302 simplify the debug and error output of 64-bit integers. This
14303 macro replaces the HIDWORD and LODWORD macros for dumping these
14306 Updated the implementation of the Stall() operator to only call
14307 AcpiOsStall(), and also return an error if the operand is larger
14308 than 255. This preserves the required behavior of not
14309 relinquishing the processor, as would happen if AcpiOsSleep() was
14310 called for "long stalls".
14312 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
14313 initialized are now treated as NOOPs.
14315 Cleaned up a handful of warnings during 64-bit generation.
14317 Fixed a reported error where and incorrect GPE number was passed
14318 to the GPE dispatch handler. This value is only used for error
14319 output, however. Used this opportunity to clean up and streamline
14320 the GPE dispatch code.
14322 Code and Data Size: Current and previous core subsystem library
14323 sizes are shown below. These are the code and data sizes for the
14324 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14325 these values do not include any ACPI driver or OSPM code. The
14327 debug version of the code includes the debug output trace
14328 mechanism and has a much larger code and data size. Note that
14329 these values will vary depending on the efficiency of the compiler
14330 and the compiler options used during generation.
14332 Previous Release (20031002):
14333 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
14334 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
14336 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
14337 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
14340 2) iASL Compiler/Disassembler:
14342 Updated the iASL compiler to return an error if the operand to the
14343 Stall() operator is larger than 255.
14346 ----------------------------------------
14347 02 October 2003. Summary of changes for version 20031002:
14350 1) ACPI CA Core Subsystem:
14352 Fixed a problem with Index Fields where the index was not
14353 incremented for fields that require multiple writes to the
14354 index/data registers (Fields that are wider than the data
14357 Fixed a problem with all Field objects where a write could go
14358 beyond the end-of-field if the field was larger than the access
14359 granularity and therefore required multiple writes to complete the
14360 request. An extra write beyond the end of the field could happen
14363 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
14364 would incorrectly be returned if the width of the Data Register
14365 was larger than the specified field access width.
14367 Completed fixes for LoadTable() and Unload() and verified their
14368 operation. Implemented full support for the "DdbHandle" object
14369 throughout the ACPI CA subsystem.
14371 Implemented full support for the MADT and ECDT tables in the ACPI
14372 CA header files. Even though these tables are not directly
14373 consumed by ACPI CA, the header definitions are useful for ACPI
14376 Integrated resource descriptor fixes posted to the Linux ACPI
14377 list. This included checks for minimum descriptor length, and
14378 support for trailing NULL strings within descriptors that have
14379 optional string elements.
14381 Code and Data Size: Current and previous core subsystem library
14382 sizes are shown below. These are the code and data sizes for the
14383 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14384 these values do not include any ACPI driver or OSPM code. The
14385 debug version of the code includes the debug output trace
14386 mechanism and has a much larger code and data size. Note that
14387 these values will vary depending on the efficiency of the compiler
14388 and the compiler options used during generation.
14390 Previous Release (20030918):
14391 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
14392 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
14394 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
14395 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
14400 Implemented detection of non-ASCII characters within the input
14401 source ASL file. This catches attempts to compile binary (AML)
14402 files early in the compile, with an informative error message.
14404 Fixed a problem where the disassembler would fault if the output
14405 filename could not be generated or if the output file could not be
14408 ----------------------------------------
14409 18 September 2003. Summary of changes for version 20030918:
14412 1) ACPI CA Core Subsystem:
14414 Found and fixed a longstanding problem with the late execution of
14415 the various deferred AML opcodes (such as Operation Regions,
14416 Buffer Fields, Buffers, and Packages). If the name string
14417 specified for the name of the new object placed the object in a
14418 scope other than the current scope, the initialization/execution
14419 of the opcode failed. The solution to this problem was to
14420 implement a mechanism where the late execution of such opcodes
14421 does not attempt to lookup/create the name a second time in an
14422 incorrect scope. This fixes the "region size computed
14423 incorrectly" problem.
14425 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
14426 Global Lock AE_BAD_PARAMETER error.
14428 Fixed several 64-bit issues with prototypes, casting and data
14431 Removed duplicate prototype from acdisasm.h
14433 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
14435 Code and Data Size: Current and previous core subsystem library
14436 sizes are shown below. These are the code and data sizes for the
14437 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14438 these values do not include any ACPI driver or OSPM code. The
14439 debug version of the code includes the debug output trace
14440 mechanism and has a much larger code and data size. Note that
14441 these values will vary depending on the efficiency of the compiler
14442 and the compiler options used during generation.
14446 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
14447 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
14449 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
14450 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
14455 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
14456 correct sleep time in seconds.
14458 ----------------------------------------
14459 14 July 2003. Summary of changes for version 20030619:
14461 1) ACPI CA Core Subsystem:
14463 Parse SSDTs in order discovered, as opposed to reverse order
14466 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
14473 Dynamically allocate SDT list (suggested by Andi Kleen)
14475 proc function return value cleanups (Andi Kleen)
14477 Correctly handle NMI watchdog during long stalls (Andrew Morton)
14479 Make it so acpismp=force works (reported by Andrew Morton)
14482 ----------------------------------------
14483 19 June 2003. Summary of changes for version 20030619:
14485 1) ACPI CA Core Subsystem:
14487 Fix To/FromBCD, eliminating the need for an arch-specific #define.
14489 Do not acquire a semaphore in the S5 shutdown path.
14491 Fix ex_digits_needed for 0. (Takayoshi Kochi)
14493 Fix sleep/stall code reversal. (Andi Kleen)
14495 Revert a change having to do with control method calling
14500 acpiphp update (Takayoshi Kochi)
14502 Export acpi_disabled for sonypi (Stelian Pop)
14504 Mention acpismp=force in config help
14506 Re-add acpitable.c and acpismp=force. This improves backwards
14508 compatibility and also cleans up the code to a significant degree.
14510 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
14512 ----------------------------------------
14513 22 May 2003. Summary of changes for version 20030522:
14515 1) ACPI CA Core Subsystem:
14517 Found and fixed a reported problem where an AE_NOT_FOUND error
14518 occurred occasionally during _BST evaluation. This turned out to
14519 be an Owner ID allocation issue where a called method did not get
14520 a new ID assigned to it. Eventually, (after 64k calls), the Owner
14521 ID UINT16 would wraparound so that the ID would be the same as the
14522 caller's and the called method would delete the caller's
14525 Implemented extended error reporting for control methods that are
14526 aborted due to a run-time exception. Output includes the exact
14527 AML instruction that caused the method abort, a dump of the method
14528 locals and arguments at the time of the abort, and a trace of all
14529 nested control method calls.
14531 Modified the interpreter to allow the creation of buffers of zero
14532 length from the AML code. Implemented new code to ensure that no
14533 attempt is made to actually allocate a memory buffer (of length
14534 zero) - instead, a simple buffer object with a NULL buffer pointer
14535 and length zero is created. A warning is no longer issued when
14536 the AML attempts to create a zero-length buffer.
14538 Implemented a workaround for the "leading asterisk issue" in
14539 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
14540 asterisk is automatically removed if present in any HID, UID, or
14541 CID strings. The iASL compiler will still flag this asterisk as
14544 Implemented full support for _CID methods that return a package of
14545 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
14546 now additionally returns a device _CID list if present. This
14547 required a change to the external interface in order to pass an
14548 ACPI_BUFFER object as a parameter since the _CID list is of
14551 Fixed a problem with the new AE_SAME_HANDLER exception where
14552 handler initialization code did not know about this exception.
14554 Code and Data Size: Current and previous core subsystem library
14555 sizes are shown below. These are the code and data sizes for the
14556 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14557 these values do not include any ACPI driver or OSPM code. The
14558 debug version of the code includes the debug output trace
14559 mechanism and has a much larger code and data size. Note that
14560 these values will vary depending on the efficiency of the compiler
14561 and the compiler options used during generation.
14563 Previous Release (20030509):
14564 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
14565 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
14567 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
14568 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
14573 Fixed a bug in which we would reinitialize the ACPI interrupt
14574 after it was already working, thus disabling all ACPI and the IRQs
14575 for any other device sharing the interrupt. (Thanks to Stian
14578 Toshiba driver update (John Belmonte)
14580 Return only 0 or 1 for our interrupt handler status (Andrew
14586 Fixed a reported problem where multiple (nested) ElseIf()
14587 statements were not handled correctly by the compiler, resulting
14588 in incorrect warnings and incorrect AML code. This was a problem
14589 in both the ASL parser and the code generator.
14594 Added changes to existing interfaces, new exception codes, and new
14595 text concerning reference count object management versus garbage
14598 ----------------------------------------
14599 09 May 2003. Summary of changes for version 20030509.
14602 1) ACPI CA Core Subsystem:
14604 Changed the subsystem initialization sequence to hold off
14605 installation of address space handlers until the hardware has been
14606 initialized and the system has entered ACPI mode. This is because
14607 the installation of space handlers can cause _REG methods to be
14608 run. Previously, the _REG methods could potentially be run before
14609 ACPI mode was enabled.
14611 Fixed some memory leak issues related to address space handler and
14612 notify handler installation. There were some problems with the
14613 reference count mechanism caused by the fact that the handler
14614 objects are shared across several namespace objects.
14616 Fixed a reported problem where reference counts within the
14617 namespace were not properly updated when named objects created by
14618 method execution were deleted.
14620 Fixed a reported problem where multiple SSDTs caused a deletion
14621 issue during subsystem termination. Restructured the table data
14622 structures to simplify the linked lists and the related code.
14624 Fixed a problem where the table ID associated with secondary
14625 tables (SSDTs) was not being propagated into the namespace objects
14626 created by those tables. This would only present a problem for
14627 tables that are unloaded at run-time, however.
14629 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
14630 type as the length parameter (instead of UINT32).
14632 Solved a long-standing problem where an ALREADY_EXISTS error
14633 appears on various systems. This problem could happen when there
14634 are multiple PCI_Config operation regions under a single PCI root
14635 bus. This doesn't happen very frequently, but there are some
14636 systems that do this in the ASL.
14638 Fixed a reported problem where the internal DeleteNode function
14639 was incorrectly handling the case where a namespace node was the
14640 first in the parent's child list, and had additional peers (not
14641 the only child, but first in the list of children.)
14643 Code and Data Size: Current core subsystem library sizes are shown
14644 below. These are the code and data sizes for the acpica.lib
14645 produced by the Microsoft Visual C++ 6.0 compiler, and these
14646 values do not include any ACPI driver or OSPM code. The debug
14647 version of the code includes the debug output trace mechanism and
14648 has a much larger code and data size. Note that these values will
14649 vary depending on the efficiency of the compiler and the compiler
14650 options used during generation.
14653 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
14654 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
14656 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
14657 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
14662 Allow ":" in OS override string (Ducrot Bruno)
14664 Kobject fix (Greg KH)
14667 3 iASL Compiler/Disassembler:
14669 Fixed a problem in the generation of the C source code files (AML
14670 is emitted in C source statements for BIOS inclusion) where the
14671 Ascii dump that appears within a C comment at the end of each line
14672 could cause a compile time error if the AML sequence happens to
14673 have an open comment or close comment sequence embedded.
14676 ----------------------------------------
14677 24 April 2003. Summary of changes for version 20030424.
14680 1) ACPI CA Core Subsystem:
14682 Support for big-endian systems has been implemented. Most of the
14683 support has been invisibly added behind big-endian versions of the
14684 ACPI_MOVE_* macros.
14686 Fixed a problem in AcpiHwDisableGpeBlock() and
14687 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
14688 low level hardware write routine. The offset parameter was
14689 actually eliminated from the low level read/write routines because
14690 they had become obsolete.
14692 Fixed a problem where a handler object was deleted twice during
14693 the removal of a fixed event handler.
14698 A fix for SMP systems with link devices was contributed by
14702 (2.5) Return whether we handled the interrupt in our IRQ handler.
14703 (Linux ISRs no longer return void, so we can propagate the handler
14704 return value from the ACPI CA core back to the OS.)
14710 The ACPI CA Programmer Reference has been updated to reflect new
14711 interfaces and changes to existing interfaces.
14713 ----------------------------------------
14714 28 March 2003. Summary of changes for version 20030328.
14716 1) ACPI CA Core Subsystem:
14718 The GPE Block Device support has been completed. New interfaces
14719 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
14720 interfaces (enable, disable, clear, getstatus) have been split
14721 into separate interfaces for Fixed Events and General Purpose
14722 Events (GPEs) in order to support GPE Block Devices properly.
14724 Fixed a problem where the error message "Failed to acquire
14725 semaphore" would appear during operations on the embedded
14728 Code and Data Size: Current core subsystem library sizes are shown
14729 below. These are the code and data sizes for the acpica.lib
14730 produced by the Microsoft Visual C++ 6.0 compiler, and these
14731 values do not include any ACPI driver or OSPM code. The debug
14732 version of the code includes the debug output trace mechanism and
14733 has a much larger code and data size. Note that these values will
14734 vary depending on the efficiency of the compiler and the compiler
14735 options used during generation.
14738 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
14739 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
14741 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
14742 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
14745 ----------------------------------------
14746 28 February 2003. Summary of changes for version 20030228.
14749 1) ACPI CA Core Subsystem:
14751 The GPE handling and dispatch code has been completely overhauled
14752 in preparation for support of GPE Block Devices (ID ACPI0006).
14753 This affects internal data structures and code only; there should
14754 be no differences visible externally. One new file has been
14757 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
14758 fields that are used to determine the GPE block lengths. The
14759 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
14760 structures are ignored. This is per the ACPI specification but it
14761 isn't very clear. The full 256 Block 0/1 GPEs are now supported
14762 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
14764 In the SCI interrupt handler, removed the read of the PM1_CONTROL
14765 register to look at the SCI_EN bit. On some machines, this read
14766 causes an SMI event and greatly slows down SCI events. (This may
14767 in fact be the cause of slow battery status response on some
14770 Fixed a problem where a store of a NULL string to a package object
14771 could cause the premature deletion of the object. This was seen
14772 during execution of the battery _BIF method on some systems,
14773 resulting in no battery data being returned.
14775 Added AcpiWalkResources interface to simplify parsing of resource
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: 72.3K Code, 9.5K Data, 81.8K Total
14792 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
14797 S3 fixes (Ole Rohne)
14799 Update ACPI PHP driver with to use new acpi_walk_resource API
14802 Add S4BIOS support (Pavel Machek)
14804 Map in entire table before performing checksum (John Stultz)
14806 Expand the mem= cmdline to allow the specification of reserved and
14807 ACPI DATA blocks (Pavel Machek)
14809 Never use ACPI on VISWS
14811 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
14813 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
14814 causing us to think that some systems support C2 when they really
14817 Do not count processor objects for non-present CPUs (Thanks to
14823 Fixed a problem where ASL include files could not be found and
14826 Added support for the _PDC reserved name.
14829 ----------------------------------------
14830 22 January 2003. Summary of changes for version 20030122.
14833 1) ACPI CA Core Subsystem:
14835 Added a check for constructs of the form: Store (Local0, Local0)
14836 where Local0 is not initialized. Apparently, some BIOS
14837 programmers believe that this is a NOOP. Since this store doesn't
14838 do anything anyway, the new prototype behavior will ignore this
14839 error. This is a case where we can relax the strict checking in
14840 the interpreter in the name of compatibility.
14845 The AcpiSrc Source Conversion Utility has been released with the
14846 Linux package for the first time. This is the utility that is
14847 used to convert the ACPI CA base source code to the Linux version.
14849 (Both) Handle P_BLK lengths shorter than 6 more gracefully
14851 (Both) Move more headers to include/acpi, and delete an unused
14854 (Both) Move drivers/acpi/include directory to include/acpi
14856 (Both) Boot functions don't use cmdline, so don't pass it around
14858 (Both) Remove include of unused header (Adrian Bunk)
14860 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
14862 former now also includes the latter, acpiphp.h only needs the one,
14865 (2.5) Make it possible to select method of bios restoring after S3
14866 resume. [=> no more ugly ifdefs] (Pavel Machek)
14868 (2.5) Make proc write interfaces work (Pavel Machek)
14870 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
14872 (2.5) Break out ACPI Perf code into its own module, under cpufreq
14873 (Dominik Brodowski)
14875 (2.4) S4BIOS support (Ducrot Bruno)
14877 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
14883 Added support to disassemble SSDT and PSDTs.
14885 Implemented support to obtain SSDTs from the Windows registry if
14889 ----------------------------------------
14890 09 January 2003. Summary of changes for version 20030109.
14892 1) ACPI CA Core Subsystem:
14894 Changed the behavior of the internal Buffer-to-String conversion
14895 function. The current ACPI specification states that the contents
14896 of the buffer are "converted to a string of two-character
14897 hexadecimal numbers, each separated by a space". Unfortunately,
14898 this definition is not backwards compatible with existing ACPI 1.0
14899 implementations (although the behavior was not defined in the ACPI
14900 1.0 specification). The new behavior simply copies data from the
14901 buffer to the string until a null character is found or the end of
14902 the buffer is reached. The new String object is always null
14903 terminated. This problem was seen during the generation of _BIF
14904 battery data where incorrect strings were returned for battery
14905 type, etc. This will also require an errata to the ACPI
14908 Renamed all instances of NATIVE_UINT and NATIVE_INT to
14909 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
14911 Copyright in all module headers (both Linux and non-Linux) has be
14914 Code and Data Size: Current core subsystem library sizes are shown
14915 below. These are the code and data sizes for the acpica.lib
14916 produced by the Microsoft Visual C++ 6.0 compiler, and these
14917 values do not include any ACPI driver or OSPM code. The debug
14918 version of the code includes the debug output trace mechanism and
14919 has a much larger code and data size. Note that these values will
14920 vary depending on the efficiency of the compiler and the compiler
14921 options used during generation.
14924 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
14925 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
14927 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
14928 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
14933 Fixed an oops on module insertion/removal (Matthew Tippett)
14935 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
14937 (2.5) Replace pr_debug (Randy Dunlap)
14939 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
14941 (Both) Eliminate spawning of thread from timer callback, in favor
14944 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
14946 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
14948 (Both) Add missing statics to button.c (Pavel Machek)
14950 Several changes have been made to the source code translation
14951 utility that generates the Linux Code in order to make the code
14954 All typedefs on structs and unions have been removed in keeping
14955 with the Linux coding style.
14957 Removed the non-Linux SourceSafe module revision number from each
14960 Completed major overhaul of symbols to be lowercased for linux.
14961 Doubled the number of symbols that are lowercased.
14963 Fixed a problem where identifiers within procedure headers and
14964 within quotes were not fully lower cased (they were left with a
14967 Some C macros whose only purpose is to allow the generation of 16-
14968 bit code are now completely removed in the Linux code, increasing
14969 readability and maintainability.
14971 ----------------------------------------
14973 12 December 2002. Summary of changes for version 20021212.
14976 1) ACPI CA Core Subsystem:
14978 Fixed a problem where the creation of a zero-length AML Buffer
14979 would cause a fault.
14981 Fixed a problem where a Buffer object that pointed to a static AML
14982 buffer (in an ACPI table) could inadvertently be deleted, causing
14985 Fixed a problem where a user buffer (passed in to the external
14986 ACPI CA interfaces) could be overwritten if the buffer was too
14987 small to complete the operation, causing memory corruption.
14989 Fixed a problem in the Buffer-to-String conversion code where a
14990 string of length one was always returned, regardless of the size
14991 of the input Buffer object.
14993 Removed the NATIVE_CHAR data type across the entire source due to
14994 lack of need and lack of consistent use.
14996 Code and Data Size: Current core subsystem library sizes are shown
14997 below. These are the code and data sizes for the acpica.lib
14998 produced by the Microsoft Visual C++ 6.0 compiler, and these
14999 values do not include any ACPI driver or OSPM code. The debug
15000 version of the code includes the debug output trace mechanism and
15001 has a much larger code and data size. Note that these values will
15002 vary depending on the efficiency of the compiler and the compiler
15003 options used during generation.
15006 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
15007 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
15009 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
15010 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
15013 ----------------------------------------
15014 05 December 2002. Summary of changes for version 20021205.
15016 1) ACPI CA Core Subsystem:
15018 Fixed a problem where a store to a String or Buffer object could
15019 cause corruption of the DSDT if the object type being stored was
15020 the same as the target object type and the length of the object
15021 being stored was equal to or smaller than the original (existing)
15022 target object. This was seen to cause corruption of battery _BIF
15023 buffers if the _BIF method modified the buffer on the fly.
15025 Fixed a problem where an internal error was generated if a control
15026 method invocation was used in an OperationRegion, Buffer, or
15027 Package declaration. This was caused by the deferred parsing of
15028 the control method and thus the deferred creation of the internal
15029 method object. The solution to this problem was to create the
15030 internal method object at the moment the method is encountered in
15031 the first pass - so that subsequent references to the method will
15032 able to obtain the required parameter count and thus properly
15033 parse the method invocation. This problem presented itself as an
15034 AE_AML_INTERNAL during the pass 1 parse phase during table load.
15036 Fixed a problem where the internal String object copy routine did
15037 not always allocate sufficient memory for the target String object
15038 and caused memory corruption. This problem was seen to cause
15039 "Allocation already present in list!" errors as memory allocation
15042 Implemented a new function for the evaluation of namespace objects
15043 that allows the specification of the allowable return object
15044 types. This simplifies a lot of code that checks for a return
15045 object of one or more specific objects returned from the
15046 evaluation (such as _STA, etc.) This may become and external
15047 function if it would be useful to ACPI-related drivers.
15049 Completed another round of prefixing #defines with "ACPI_" for
15052 Completed additional code restructuring to allow more modular
15053 linking for iASL compiler and AcpiExec. Several files were split
15054 creating new files. New files: nsparse.c dsinit.c evgpe.c
15056 Implemented an abort mechanism to terminate an executing control
15057 method via the AML debugger. This feature is useful for debugging
15058 control methods that depend (wait) for specific hardware
15061 Code and Data Size: Current core subsystem library sizes are shown
15062 below. These are the code and data sizes for the acpica.lib
15063 produced by the Microsoft Visual C++ 6.0 compiler, and these
15064 values do not include any ACPI driver or OSPM code. The debug
15065 version of the code includes the debug output trace mechanism and
15066 has a much larger code and data size. Note that these values will
15067 vary depending on the efficiency of the compiler and the compiler
15068 options used during generation.
15071 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15072 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
15074 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
15075 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
15078 2) iASL Compiler/Disassembler
15080 Fixed a compiler code generation problem for "Interrupt" Resource
15081 Descriptors. If specified in the ASL, the optional "Resource
15082 Source Index" and "Resource Source" fields were not inserted into
15083 the correct location within the AML resource descriptor, creating
15084 an invalid descriptor.
15086 Fixed a disassembler problem for "Interrupt" resource descriptors.
15087 The optional "Resource Source Index" and "Resource Source" fields
15091 ----------------------------------------
15092 22 November 2002. Summary of changes for version 20021122.
15095 1) ACPI CA Core Subsystem:
15097 Fixed a reported problem where an object stored to a Method Local
15098 or Arg was not copied to a new object during the store - the
15099 object pointer was simply copied to the Local/Arg. This caused
15100 all subsequent operations on the Local/Arg to also affect the
15101 original source of the store operation.
15103 Fixed a problem where a store operation to a Method Local or Arg
15104 was not completed properly if the Local/Arg contained a reference
15105 (from RefOf) to a named field. The general-purpose store-to-
15106 namespace-node code is now used so that this case is handled
15109 Fixed a problem where the internal object copy routine would cause
15110 a protection fault if the object being copied was a Package and
15111 contained either 1) a NULL package element or 2) a nested sub-
15114 Fixed a problem with the GPE initialization that resulted from an
15115 ambiguity in the ACPI specification. One section of the
15116 specification states that both the address and length of the GPE
15117 block must be zero if the block is not supported. Another section
15118 implies that only the address need be zero if the block is not
15119 supported. The code has been changed so that both the address and
15120 the length must be non-zero to indicate a valid GPE block (i.e.,
15121 if either the address or the length is zero, the GPE block is
15124 Code and Data Size: Current core subsystem library sizes are shown
15125 below. These are the code and data sizes for the acpica.lib
15126 produced by the Microsoft Visual C++ 6.0 compiler, and these
15127 values do not include any ACPI driver or OSPM code. The debug
15128 version of the code includes the debug output trace mechanism and
15129 has a much larger code and data size. Note that these values will
15130 vary depending on the efficiency of the compiler and the compiler
15131 options used during generation.
15134 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
15135 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
15137 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15138 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
15143 Cleaned up EC driver. Exported an external EC read/write
15144 interface. By going through this, other drivers (most notably
15145 sonypi) will be able to serialize access to the EC.
15148 3) iASL Compiler/Disassembler
15150 Implemented support to optionally generate include files for both
15151 ASM and C (the -i switch). This simplifies BIOS development by
15152 automatically creating include files that contain external
15153 declarations for the symbols that are created within the
15155 (optionally generated) ASM and C AML source files.
15158 ----------------------------------------
15159 15 November 2002. Summary of changes for version 20021115.
15161 1) ACPI CA Core Subsystem:
15163 Fixed a memory leak problem where an error during resolution of
15165 method arguments during a method invocation from another method
15166 failed to cleanup properly by deleting all successfully resolved
15169 Fixed a problem where the target of the Index() operator was not
15170 correctly constructed if the source object was a package. This
15171 problem has not been detected because the use of a target operand
15172 with Index() is very rare.
15174 Fixed a problem with the Index() operator where an attempt was
15175 made to delete the operand objects twice.
15177 Fixed a problem where an attempt was made to delete an operand
15178 twice during execution of the CondRefOf() operator if the target
15181 Implemented the first of perhaps several internal create object
15182 functions that create and initialize a specific object type. This
15183 consolidates duplicated code wherever the object is created, thus
15184 shrinking the size of the subsystem.
15186 Implemented improved debug/error messages for errors that occur
15187 during nested method invocations. All executing method pathnames
15188 are displayed (with the error) as the call stack is unwound - thus
15191 Fixed a problem introduced in the 10/02 release that caused
15192 premature deletion of a buffer object if a buffer was used as an
15193 ASL operand where an integer operand is required (Thus causing an
15194 implicit object conversion from Buffer to Integer.) The change in
15195 the 10/02 release was attempting to fix a memory leak (albeit
15198 Code and Data Size: Current core subsystem library sizes are shown
15199 below. These are the code and data sizes for the acpica.lib
15200 produced by the Microsoft Visual C++ 6.0 compiler, and these
15201 values do not include any ACPI driver or OSPM code. The debug
15202 version of the code includes the debug output trace mechanism and
15203 has a much larger code and data size. Note that these values will
15204 vary depending on the efficiency of the compiler and the compiler
15205 options used during generation.
15208 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
15209 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
15211 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
15212 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
15217 Changed the implementation of the ACPI semaphores to use down()
15218 instead of down_interruptable(). It is important that the
15219 execution of ACPI control methods not be interrupted by signals.
15220 Methods must run to completion, or the system may be left in an
15221 unknown/unstable state.
15223 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
15227 3) iASL Compiler/Disassembler
15230 Changed the default location of output files. All output files
15231 are now placed in the current directory by default instead of in
15232 the directory of the source file. This change may affect some
15233 existing makefiles, but it brings the behavior of the compiler in
15234 line with other similar tools. The location of the output files
15235 can be overridden with the -p command line switch.
15238 ----------------------------------------
15239 11 November 2002. Summary of changes for version 20021111.
15242 0) ACPI Specification 2.0B is released and is now available at:
15243 http://www.acpi.info/index.html
15246 1) ACPI CA Core Subsystem:
15248 Implemented support for the ACPI 2.0 SMBus Operation Regions.
15249 This includes the early detection and handoff of the request to
15250 the SMBus region handler (avoiding all of the complex field
15251 support code), and support for the bidirectional return packet
15252 from an SMBus write operation. This paves the way for the
15253 development of SMBus drivers in each host operating system.
15255 Fixed a problem where the semaphore WAIT_FOREVER constant was
15256 defined as 32 bits, but must be 16 bits according to the ACPI
15257 specification. This had the side effect of causing ASL
15258 Mutex/Event timeouts even though the ASL code requested a wait
15259 forever. Changed all internal references to the ACPI timeout
15260 parameter to 16 bits to prevent future problems. Changed the name
15261 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
15263 Code and Data Size: Current core subsystem library sizes are shown
15264 below. These are the code and data sizes for the acpica.lib
15265 produced by the Microsoft Visual C++ 6.0 compiler, and these
15266 values do not include any ACPI driver or OSPM code. The debug
15267 version of the code includes the debug output trace mechanism and
15268 has a much larger code and data size. Note that these values will
15269 vary depending on the efficiency of the compiler and the compiler
15270 options used during generation.
15273 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15274 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
15276 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
15277 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
15282 Module loading/unloading fixes (John Cagle)
15285 3) iASL Compiler/Disassembler
15287 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
15289 Implemented support for the disassembly of all SMBus protocol
15290 keywords (SMBQuick, SMBWord, etc.)
15292 ----------------------------------------
15293 01 November 2002. Summary of changes for version 20021101.
15296 1) ACPI CA Core Subsystem:
15298 Fixed a problem where platforms that have a GPE1 block but no GPE0
15299 block were not handled correctly. This resulted in a "GPE
15300 overlap" error message. GPE0 is no longer required.
15302 Removed code added in the previous release that inserted nodes
15303 into the namespace in alphabetical order. This caused some side-
15304 effects on various machines. The root cause of the problem is
15305 still under investigation since in theory, the internal ordering
15306 of the namespace nodes should not matter.
15309 Enhanced error reporting for the case where a named object is not
15310 found during control method execution. The full ACPI namepath
15311 (name reference) of the object that was not found is displayed in
15314 Note: as a result of the overhaul of the namespace object types in
15315 the previous release, the namespace nodes for the predefined
15316 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
15317 instead of ACPI_TYPE_ANY. This simplifies the namespace
15318 management code but may affect code that walks the namespace tree
15319 looking for specific object types.
15321 Code and Data Size: Current core subsystem library sizes are shown
15322 below. These are the code and data sizes for the acpica.lib
15323 produced by the Microsoft Visual C++ 6.0 compiler, and these
15324 values do not include any ACPI driver or OSPM code. The debug
15325 version of the code includes the debug output trace mechanism and
15326 has a much larger code and data size. Note that these values will
15327 vary depending on the efficiency of the compiler and the compiler
15328 options used during generation.
15331 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
15332 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
15334 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
15335 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
15340 Fixed a problem introduced in the previous release where the
15341 Processor and Thermal objects were not recognized and installed in
15342 /proc. This was related to the scope type change described above.
15345 3) iASL Compiler/Disassembler
15347 Implemented the -g option to get all of the required ACPI tables
15348 from the registry and save them to files (Windows version of the
15349 compiler only.) The required tables are the FADT, FACS, and DSDT.
15351 Added ACPI table checksum validation during table disassembly in
15352 order to catch corrupted tables.
15355 ----------------------------------------
15356 22 October 2002. Summary of changes for version 20021022.
15358 1) ACPI CA Core Subsystem:
15360 Implemented a restriction on the Scope operator that the target
15361 must already exist in the namespace at the time the operator is
15362 encountered (during table load or method execution). In other
15363 words, forward references are not allowed and Scope() cannot
15364 create a new object. This changes the previous behavior where the
15365 interpreter would create the name if not found. This new behavior
15366 correctly enables the search-to-root algorithm during namespace
15367 lookup of the target name. Because of this upsearch, this fixes
15368 the known Compaq _SB_.OKEC problem and makes both the AML
15369 interpreter and iASL compiler compatible with other ACPI
15372 Completed a major overhaul of the internal ACPI object types for
15373 the ACPI Namespace and the associated operand objects. Many of
15374 these types had become obsolete with the introduction of the two-
15375 pass namespace load. This cleanup simplifies the code and makes
15376 the entire namespace load mechanism much clearer and easier to
15379 Improved debug output for tracking scope opening/closing to help
15380 diagnose scoping issues. The old scope name as well as the new
15381 scope name are displayed. Also improved error messages for
15382 problems with ASL Mutex objects and error messages for GPE
15385 Cleaned up the namespace dump code, removed obsolete code.
15387 All string output (for all namespace/object dumps) now uses the
15388 common ACPI string output procedure which handles escapes properly
15389 and does not emit non-printable characters.
15391 Fixed some issues with constants in the 64-bit version of the
15392 local C library (utclib.c)
15397 EC Driver: No longer attempts to acquire the Global Lock at
15401 3) iASL Compiler/Disassembler
15403 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
15404 2 opcodes outside of a control method. This means that the
15405 "executable" operators (versus the "namespace" operators) cannot
15406 be used at the table level; they can only be used within a control
15409 Implemented the restriction on the Scope() operator where the
15410 target must already exist in the namespace at the time the
15411 operator is encountered (during ASL compilation). In other words,
15412 forward references are not allowed and Scope() cannot create a new
15413 object. This makes the iASL compiler compatible with other ACPI
15414 implementations and makes the Scope() implementation adhere to the
15415 ACPI specification.
15417 Fixed a problem where namepath optimization for the Alias operator
15418 was optimizing the wrong path (of the two namepaths.) This caused
15419 a "Missing alias link" error message.
15421 Fixed a problem where an "unknown reserved name" warning could be
15422 incorrectly generated for names like "_SB" when the trailing
15423 underscore is not used in the original ASL.
15425 Fixed a problem where the reserved name check did not handle
15426 NamePaths with multiple NameSegs correctly. The first nameseg of
15427 the NamePath was examined instead of the last NameSeg.
15430 ----------------------------------------
15432 02 October 2002. Summary of changes for this release.
15435 1) ACPI CA Core Subsystem version 20021002:
15437 Fixed a problem where a store/copy of a string to an existing
15438 string did not always set the string length properly in the String
15441 Fixed a reported problem with the ToString operator where the
15442 behavior was identical to the ToHexString operator instead of just
15443 simply converting a raw buffer to a string data type.
15445 Fixed a problem where CopyObject and the other "explicit"
15446 conversion operators were not updating the internal namespace node
15447 type as part of the store operation.
15449 Fixed a memory leak during implicit source operand conversion
15450 where the original object was not deleted if it was converted to a
15451 new object of a different type.
15453 Enhanced error messages for all problems associated with namespace
15454 lookups. Common procedure generates and prints the lookup name as
15455 well as the formatted status.
15457 Completed implementation of a new design for the Alias support
15458 within the namespace. The existing design did not handle the case
15459 where a new object was assigned to one of the two names due to the
15460 use of an explicit conversion operator, resulting in the two names
15461 pointing to two different objects. The new design simply points
15462 the Alias name to the original name node - not to the object.
15463 This results in a level of indirection that must be handled in the
15464 name resolution mechanism.
15466 Code and Data Size: Current core subsystem library sizes are shown
15467 below. These are the code and data sizes for the acpica.lib
15468 produced by the Microsoft Visual C++ 6.0 compiler, and these
15469 values do not include any ACPI driver or OSPM code. The debug
15470 version of the code includes the debug output trace mechanism and
15471 has a larger code and data size. Note that these values will vary
15472 depending on the efficiency of the compiler and the compiler
15473 options used during generation.
15476 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
15477 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
15479 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
15480 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
15485 Initialize thermal driver's timer before it is used. (Knut
15488 Allow handling negative celsius values. (Kochi Takayoshi)
15490 Fix thermal management and make trip points. R/W (Pavel Machek)
15492 Fix /proc/acpi/sleep. (P. Christeas)
15494 IA64 fixes. (David Mosberger)
15496 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
15498 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
15502 3) iASL Compiler/Disassembler
15504 Clarified some warning/error messages.
15507 ----------------------------------------
15508 18 September 2002. Summary of changes for this release.
15511 1) ACPI CA Core Subsystem version 20020918:
15513 Fixed a reported problem with reference chaining (via the Index()
15514 and RefOf() operators) in the ObjectType() and SizeOf() operators.
15515 The definition of these operators includes the dereferencing of
15516 all chained references to return information on the base object.
15518 Fixed a problem with stores to indexed package elements - the
15519 existing code would not complete the store if an "implicit
15520 conversion" was not performed. In other words, if the existing
15521 object (package element) was to be replaced completely, the code
15522 didn't handle this case.
15524 Relaxed typechecking on the ASL "Scope" operator to allow the
15525 target name to refer to an object of type Integer, String, or
15526 Buffer, in addition to the scoping object types (Device,
15527 predefined Scopes, Processor, PowerResource, and ThermalZone.)
15528 This allows existing AML code that has workarounds for a bug in
15529 Windows to function properly. A warning is issued, however. This
15530 affects both the AML interpreter and the iASL compiler. Below is
15531 an example of this type of ASL code:
15537 Fixed some reported problems with 64-bit integer support in the
15538 local implementation of C library functions (clib.c)
15543 Use ACPI fix map region instead of IOAPIC region, since it is
15544 undefined in non-SMP.
15546 Ensure that the SCI has the proper polarity and trigger, even on
15547 systems that do not have an interrupt override entry in the MADT.
15549 2.5 big driver reorganization (Pat Mochel)
15551 Use early table mapping code from acpitable.c (Andi Kleen)
15553 New blacklist entries (Andi Kleen)
15555 Blacklist improvements. Split blacklist code out into a separate
15556 file. Move checking the blacklist to very early. Previously, we
15557 would use ACPI tables, and then halfway through init, check the
15558 blacklist -- too late. Now, it's early enough to completely fall-
15562 3) iASL Compiler/Disassembler version 20020918:
15564 Fixed a problem where the typechecking code didn't know that an
15565 alias could point to a method. In other words, aliases were not
15566 being dereferenced during typechecking.
15569 ----------------------------------------
15570 29 August 2002. Summary of changes for this release.
15572 1) ACPI CA Core Subsystem Version 20020829:
15574 If the target of a Scope() operator already exists, it must be an
15575 object type that actually opens a scope -- such as a Device,
15576 Method, Scope, etc. This is a fatal runtime error. Similar error
15577 check has been added to the iASL compiler also.
15579 Tightened up the namespace load to disallow multiple names in the
15580 same scope. This previously was allowed if both objects were of
15581 the same type. (i.e., a lookup was the same as entering a new
15587 Ensure that the ACPI interrupt has the proper trigger and
15590 local_irq_disable is extraneous. (Matthew Wilcox)
15592 Make "acpi=off" actually do what it says, and not use the ACPI
15593 interpreter *or* the tables.
15595 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
15599 3) iASL Compiler/Disassembler Version 20020829:
15601 Implemented namepath optimization for name declarations. For
15602 example, a declaration like "Method (\_SB_.ABCD)" would get
15603 optimized to "Method (ABCD)" if the declaration is within the
15604 \_SB_ scope. This optimization is in addition to the named
15605 reference path optimization first released in the previous
15606 version. This would seem to complete all possible optimizations
15607 for namepaths within the ASL/AML.
15609 If the target of a Scope() operator already exists, it must be an
15610 object type that actually opens a scope -- such as a Device,
15611 Method, Scope, etc.
15613 Implemented a check and warning for unreachable code in the same
15614 block below a Return() statement.
15616 Fixed a problem where the listing file was not generated if the
15617 compiler aborted if the maximum error count was exceeded (200).
15619 Fixed a problem where the typechecking of method return values was
15620 broken. This includes the check for a return value when the
15621 method is invoked as a TermArg (a return value is expected.)
15623 Fixed a reported problem where EOF conditions during a quoted
15624 string or comment caused a fault.
15627 ----------------------------------------
15628 15 August 2002. Summary of changes for this release.
15630 1) ACPI CA Core Subsystem Version 20020815:
15632 Fixed a reported problem where a Store to a method argument that
15633 contains a reference did not perform the indirect store correctly.
15634 This problem was created during the conversion to the new
15635 reference object model - the indirect store to a method argument
15636 code was not updated to reflect the new model.
15638 Reworked the ACPI mode change code to better conform to ACPI 2.0,
15639 handle corner cases, and improve code legibility (Kochi Takayoshi)
15641 Fixed a problem with the pathname parsing for the carat (^)
15642 prefix. The heavy use of the carat operator by the new namepath
15643 optimization in the iASL compiler uncovered a problem with the AML
15644 interpreter handling of this prefix. In the case where one or
15645 more carats precede a single nameseg, the nameseg was treated as
15646 standalone and the search rule (to root) was inadvertently
15647 applied. This could cause both the iASL compiler and the
15648 interpreter to find the wrong object or to miss the error that
15649 should occur if the object does not exist at that exact pathname.
15651 Found and fixed the problem where the HP Pavilion DSDT would not
15652 load. This was a relatively minor tweak to the table loading code
15653 (a problem caused by the unexpected encounter with a method
15654 invocation not within a control method), but it does not solve the
15655 overall issue of the execution of AML code at the table level.
15656 This investigation is still ongoing.
15658 Code and Data Size: Current core subsystem library sizes are shown
15659 below. These are the code and data sizes for the acpica.lib
15660 produced by the Microsoft Visual C++ 6.0 compiler, and these
15661 values do not include any ACPI driver or OSPM code. The debug
15662 version of the code includes the debug output trace mechanism and
15663 has a larger code and data size. Note that these values will vary
15664 depending on the efficiency of the compiler and the compiler
15665 options used during generation.
15668 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
15669 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
15671 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
15672 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
15677 Remove redundant slab.h include (Brad Hards)
15679 Fix several bugs in thermal.c (Herbert Nachtnebel)
15681 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
15683 Change acpi_system_suspend to use updated irq functions (Pavel
15686 Export acpi_get_firmware_table (Matthew Wilcox)
15688 Use proper root proc entry for ACPI (Kochi Takayoshi)
15690 Fix early-boot table parsing (Bjorn Helgaas)
15693 3) iASL Compiler/Disassembler
15695 Reworked the compiler options to make them more consistent and to
15696 use two-letter options where appropriate. We were running out of
15697 sensible letters. This may break some makefiles, so check the
15698 current options list by invoking the compiler with no parameters.
15700 Completed the design and implementation of the ASL namepath
15701 optimization option for the compiler. This option optimizes all
15702 references to named objects to the shortest possible path. The
15703 first attempt tries to utilize a single nameseg (4 characters) and
15704 the "search-to-root" algorithm used by the interpreter. If that
15705 cannot be used (because either the name is not in the search path
15706 or there is a conflict with another object with the same name),
15707 the pathname is optimized using the carat prefix (usually a
15708 shorter string than specifying the entire path from the root.)
15710 Implemented support to obtain the DSDT from the Windows registry
15711 (when the disassembly option is specified with no input file).
15712 Added this code as the implementation for AcpiOsTableOverride in
15713 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
15714 utility) to scan memory for the DSDT to the AcpiOsTableOverride
15715 function in the DOS OSL to make the disassembler truly OS
15718 Implemented a new option to disassemble and compile in one step.
15719 When used without an input filename, this option will grab the
15720 DSDT from the local machine, disassemble it, and compile it in one
15723 Added a warning message for invalid escapes (a backslash followed
15724 by any character other than the allowable escapes). This catches
15725 the quoted string error "\_SB_" (which should be "\\_SB_" ).
15727 Also, there are numerous instances in the ACPI specification where
15730 Added a compiler option to disable all optimizations. This is
15731 basically the "compatibility mode" because by using this option,
15732 the AML code will come out exactly the same as other ASL
15735 Added error messages for incorrectly ordered dependent resource
15736 functions. This includes: missing EndDependentFn macro at end of
15737 dependent resource list, nested dependent function macros (both
15738 start and end), and missing StartDependentFn macro. These are
15739 common errors that should be caught at compile time.
15741 Implemented _OSI support for the disassembler and compiler. _OSI
15742 must be included in the namespace for proper disassembly (because
15743 the disassembler must know the number of arguments.)
15745 Added an "optimization" message type that is optional (off by
15746 default). This message is used for all optimizations - including
15747 constant folding, integer optimization, and namepath optimization.
15749 ----------------------------------------
15750 25 July 2002. Summary of changes for this release.
15753 1) ACPI CA Core Subsystem Version 20020725:
15755 The AML Disassembler has been enhanced to produce compilable ASL
15756 code and has been integrated into the iASL compiler (see below) as
15757 well as the single-step disassembly for the AML debugger and the
15758 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
15759 resource templates and macros are fully supported. The
15760 disassembler has been tested on over 30 different AML files,
15761 producing identical AML when the resulting disassembled ASL file
15762 is recompiled with the same ASL compiler.
15764 Modified the Resource Manager to allow zero interrupts and zero
15765 dma channels during the GetCurrentResources call. This was
15766 causing problems on some platforms.
15768 Added the AcpiOsRedirectOutput interface to the OSL to simplify
15769 output redirection for the AcpiOsPrintf and AcpiOsVprintf
15772 Code and Data Size: Current core subsystem library sizes are shown
15773 below. These are the code and data sizes for the acpica.lib
15774 produced by the Microsoft Visual C++ 6.0 compiler, and these
15775 values do not include any ACPI driver or OSPM code. The debug
15776 version of the code includes the debug output trace mechanism and
15777 has a larger code and data size. Note that these values will vary
15778 depending on the efficiency of the compiler and the compiler
15779 options used during generation.
15782 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
15783 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
15785 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
15786 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
15791 Fixed a panic in the EC driver (Dominik Brodowski)
15793 Implemented checksum of the R/XSDT itself during Linux table scan
15799 The AML disassembler is integrated into the compiler. The "-d"
15800 option invokes the disassembler to completely disassemble an
15801 input AML file, producing as output a text ASL file with the
15802 extension ".dsl" (to avoid name collisions with existing .asl
15803 source files.) A future enhancement will allow the disassembler
15804 to obtain the BIOS DSDT from the registry under Windows.
15806 Fixed a problem with the VendorShort and VendorLong resource
15807 descriptors where an invalid AML sequence was created.
15809 Implemented a fix for BufferData term in the ASL parser. It was
15810 inadvertently defined twice, allowing invalid syntax to pass and
15811 causing reduction conflicts.
15813 Fixed a problem where the Ones opcode could get converted to a
15814 value of zero if "Ones" was used where a byte, word or dword value
15815 was expected. The 64-bit value is now truncated to the correct
15816 size with the correct value.
15820 ----------------------------------------
15821 02 July 2002. Summary of changes for this release.
15824 1) ACPI CA Core Subsystem Version 20020702:
15826 The Table Manager code has been restructured to add several new
15827 features. Tables that are not required by the core subsystem
15828 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
15829 validated in any way and are returned from AcpiGetFirmwareTable if
15830 requested. The AcpiOsTableOverride interface is now called for
15831 each table that is loaded by the subsystem in order to allow the
15832 host to override any table it chooses. Previously, only the DSDT
15833 could be overridden. Added one new files, tbrsdt.c and
15836 Fixed a problem with the conversion of internal package objects to
15837 external objects (when a package is returned from a control
15838 method.) The return buffer length was set to zero instead of the
15839 proper length of the package object.
15841 Fixed a reported problem with the use of the RefOf and DeRefOf
15842 operators when passing reference arguments to control methods. A
15843 new type of Reference object is used internally for references
15844 produced by the RefOf operator.
15846 Added additional error messages in the Resource Manager to explain
15847 AE_BAD_DATA errors when they occur during resource parsing.
15849 Split the AcpiEnableSubsystem into two primitives to enable a
15850 finer granularity initialization sequence. These two calls should
15851 be called in this order: AcpiEnableSubsystem (flags),
15852 AcpiInitializeObjects (flags). The flags parameter remains the
15858 Updated the ACPI utilities module to understand the new style of
15859 fully resolved package objects that are now returned from the core
15860 subsystem. This eliminates errors of the form:
15862 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
15863 acpi_utils-0430 [145] acpi_evaluate_reference:
15864 Invalid element in package (not a device reference)
15866 The method evaluation utility uses the new buffer allocation
15867 scheme instead of calling AcpiEvaluate Object twice.
15869 Added support for ECDT. This allows the use of the Embedded
15871 Controller before the namespace has been fully initialized, which
15872 is necessary for ACPI 2.0 support, and for some laptops to
15873 initialize properly. (Laptops using ECDT are still rare, so only
15874 limited testing was performed of the added functionality.)
15876 Fixed memory leaks in the EC driver.
15878 Eliminated a brittle code structure in acpi_bus_init().
15880 Eliminated the acpi_evaluate() helper function in utils.c. It is
15881 no longer needed since acpi_evaluate_object can optionally
15882 allocate memory for the return object.
15884 Implemented fix for keyboard hang when getting battery readings on
15885 some systems (Stephen White)
15887 PCI IRQ routing update (Dominik Brodowski)
15889 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
15892 ----------------------------------------
15893 11 June 2002. Summary of changes for this release.
15896 1) ACPI CA Core Subsystem Version 20020611:
15898 Fixed a reported problem where constants such as Zero and One
15899 appearing within _PRT packages were not handled correctly within
15900 the resource manager code. Originally reported against the ASL
15901 compiler because the code generator now optimizes integers to
15902 their minimal AML representation (i.e. AML constants if possible.)
15903 The _PRT code now handles all AML constant opcodes correctly
15904 (Zero, One, Ones, Revision).
15906 Fixed a problem with the Concatenate operator in the AML
15907 interpreter where a buffer result object was incorrectly marked as
15908 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
15910 All package sub-objects are now fully resolved before they are
15911 returned from the external ACPI interfaces. This means that name
15912 strings are resolved to object handles, and constant operators
15913 (Zero, One, Ones, Revision) are resolved to Integers.
15915 Implemented immediate resolution of the AML Constant opcodes
15916 (Zero, One, Ones, Revision) to Integer objects upon detection
15917 within the AML stream. This has simplified and reduced the
15918 generated code size of the subsystem by eliminating about 10
15919 switch statements for these constants (which previously were
15920 contained in Reference objects.) The complicating issues are that
15921 the Zero opcode is used as a "placeholder" for unspecified
15922 optional target operands and stores to constants are defined to be
15925 Code and Data Size: Current core subsystem library sizes are shown
15926 below. These are the code and data sizes for the acpica.lib
15927 produced by the Microsoft Visual C++ 6.0 compiler, and these
15928 values do not include any ACPI driver or OSPM code. The debug
15929 version of the code includes the debug output trace mechanism and
15930 has a larger code and data size. Note that these values will vary
15931 depending on the efficiency of the compiler and the compiler
15932 options used during generation.
15935 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
15936 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
15938 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
15939 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
15945 Added preliminary support for obtaining _TRA data for PCI root
15946 bridges (Bjorn Helgaas).
15949 3) iASL Compiler Version X2046:
15951 Fixed a problem where the "_DDN" reserved name was defined to be a
15952 control method with one argument. There are no arguments, and
15953 _DDN does not have to be a control method.
15955 Fixed a problem with the Linux version of the compiler where the
15956 source lines printed with error messages were the wrong lines.
15957 This turned out to be the "LF versus CR/LF" difference between
15958 Windows and Unix. This appears to be the longstanding issue
15959 concerning listing output and error messages.
15961 Fixed a problem with the Linux version of compiler where opcode
15962 names within error messages were wrong. This was caused by a
15963 slight difference in the output of the Flex tool on Linux versus
15966 Fixed a problem with the Linux compiler where the hex output files
15967 contained some garbage data caused by an internal buffer overrun.
15970 ----------------------------------------
15971 17 May 2002. Summary of changes for this release.
15974 1) ACPI CA Core Subsystem Version 20020517:
15976 Implemented a workaround to an BIOS bug discovered on the HP
15977 OmniBook where the FADT revision number and the table size are
15978 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
15979 behavior is to fallback to using only the ACPI 1.0 fields of the
15980 FADT if the table is too small to be a ACPI 2.0 table as claimed
15981 by the revision number. Although this is a BIOS bug, this is a
15982 case where the workaround is simple enough and with no side
15983 effects, so it seemed prudent to add it. A warning message is
15986 Implemented minimum size checks for the fixed-length ACPI tables -
15987 - the FADT and FACS, as well as consistency checks between the
15988 revision number and the table size.
15990 Fixed a reported problem in the table override support where the
15991 new table pointer was incorrectly treated as a physical address
15992 instead of a logical address.
15994 Eliminated the use of the AE_AML_ERROR exception and replaced it
15995 with more descriptive codes.
15997 Fixed a problem where an exception would occur if an ASL Field was
15998 defined with no named Field Units underneath it (used by some
16001 Code and Data Size: Current core subsystem library sizes are shown
16002 below. These are the code and data sizes for the acpica.lib
16003 produced by the Microsoft Visual C++ 6.0 compiler, and these
16004 values do not include any ACPI driver or OSPM code. The debug
16005 version of the code includes the debug output trace mechanism and
16006 has a larger code and data size. Note that these values will vary
16007 depending on the efficiency of the compiler and the compiler
16008 options used during generation.
16011 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
16012 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
16014 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
16015 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
16021 Much work done on ACPI init (MADT and PCI IRQ routing support).
16022 (Paul D. and Dominik Brodowski)
16024 Fix PCI IRQ-related panic on boot (Sam Revitch)
16026 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
16028 Fix "MHz" typo (Dominik Brodowski)
16030 Fix RTC year 2000 issue (Dominik Brodowski)
16032 Preclude multiple button proc entries (Eric Brunet)
16034 Moved arch-specific code out of include/platform/aclinux.h
16036 3) iASL Compiler Version X2044:
16038 Implemented error checking for the string used in the EISAID macro
16039 (Usually used in the definition of the _HID object.) The code now
16040 strictly enforces the PnP format - exactly 7 characters, 3
16041 uppercase letters and 4 hex digits.
16043 If a raw string is used in the definition of the _HID object
16044 (instead of the EISAID macro), the string must contain all
16045 alphanumeric characters (e.g., "*PNP0011" is not allowed because
16048 Implemented checking for invalid use of ACPI reserved names for
16049 most of the name creation operators (Name, Device, Event, Mutex,
16050 OperationRegion, PowerResource, Processor, and ThermalZone.)
16051 Previously, this check was only performed for control methods.
16053 Implemented an additional check on the Name operator to emit an
16054 error if a reserved name that must be implemented in ASL as a
16055 control method is used. We know that a reserved name must be a
16056 method if it is defined with input arguments.
16058 The warning emitted when a namespace object reference is not found
16059 during the cross reference phase has been changed into an error.
16060 The "External" directive should be used for names defined in other
16064 4) Tools and Utilities
16066 The 16-bit tools (adump16 and aexec16) have been regenerated and
16069 Fixed a problem with the output of both acpidump and adump16 where
16070 the indentation of closing parentheses and brackets was not
16072 aligned properly with the parent block.
16075 ----------------------------------------
16076 03 May 2002. Summary of changes for this release.
16079 1) ACPI CA Core Subsystem Version 20020503:
16081 Added support a new OSL interface that allows the host operating
16083 system software to override the DSDT found in the firmware -
16084 AcpiOsTableOverride. With this interface, the OSL can examine the
16085 version of the firmware DSDT and replace it with a different one
16088 Added new external interfaces for accessing ACPI registers from
16089 device drivers and other system software - AcpiGetRegister and
16090 AcpiSetRegister. This was simply an externalization of the
16091 existing AcpiHwBitRegister interfaces.
16093 Fixed a regression introduced in the previous build where the
16094 ASL/AML CreateField operator always returned an error,
16095 "destination must be a NS Node".
16097 Extended the maximum time (before failure) to successfully enable
16098 ACPI mode to 3 seconds.
16100 Code and Data Size: Current core subsystem library sizes are shown
16101 below. These are the code and data sizes for the acpica.lib
16102 produced by the Microsoft Visual C++ 6.0 compiler, and these
16103 values do not include any ACPI driver or OSPM code. The debug
16104 version of the code includes the debug output trace mechanism and
16105 has a larger code and data size. Note that these values will vary
16106 depending on the efficiency of the compiler and the compiler
16107 options used during generation.
16110 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
16111 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
16113 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
16114 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
16119 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
16120 free. While 3 out of 4 of our in-house systems work fine, the last
16121 one still hangs when testing the LAPIC timer.
16123 Renamed many files in 2.5 kernel release to omit "acpi_" from the
16126 Added warning on boot for Presario 711FR.
16128 Sleep improvements (Pavel Machek)
16130 ACPI can now be built without CONFIG_PCI enabled.
16132 IA64: Fixed memory map functions (JI Lee)
16135 3) iASL Compiler Version X2043:
16137 Added support to allow the compiler to be integrated into the MS
16138 VC++ development environment for one-button compilation of single
16139 files or entire projects -- with error-to-source-line mapping.
16141 Implemented support for compile-time constant folding for the
16142 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
16143 specification. This allows the ASL writer to use expressions
16144 instead of Integer/Buffer/String constants in terms that must
16145 evaluate to constants at compile time and will also simplify the
16146 emitted AML in any such sub-expressions that can be folded
16147 (evaluated at compile-time.) This increases the size of the
16148 compiler significantly because a portion of the ACPI CA AML
16149 interpreter is included within the compiler in order to pre-
16150 evaluate constant expressions.
16153 Fixed a problem with the "Unicode" ASL macro that caused the
16154 compiler to fault. (This macro is used in conjunction with the
16155 _STR reserved name.)
16157 Implemented an AML opcode optimization to use the Zero, One, and
16158 Ones opcodes where possible to further reduce the size of integer
16159 constants and thus reduce the overall size of the generated AML
16162 Implemented error checking for new reserved terms for ACPI version
16165 Implemented the -qr option to display the current list of ACPI
16166 reserved names known to the compiler.
16168 Implemented the -qc option to display the current list of ASL
16169 operators that are allowed within constant expressions and can
16170 therefore be folded at compile time if the operands are constants.
16175 Updated the Programmer's Reference for new interfaces, data types,
16176 and memory allocation model options.
16178 Updated the iASL Compiler User Reference to apply new format and
16179 add information about new features and options.
16181 ----------------------------------------
16182 19 April 2002. Summary of changes for this release.
16184 1) ACPI CA Core Subsystem Version 20020419:
16186 The source code base for the Core Subsystem has been completely
16187 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
16188 versions. The Lint option files used are included in the
16189 /acpi/generate/lint directory.
16191 Implemented enhanced status/error checking across the entire
16192 Hardware manager subsystem. Any hardware errors (reported from
16193 the OSL) are now bubbled up and will abort a running control
16197 Fixed a problem where the per-ACPI-table integer width (32 or 64)
16198 was stored only with control method nodes, causing a fault when
16199 non-control method code was executed during table loading. The
16200 solution implemented uses a global variable to indicate table
16201 width across the entire ACPI subsystem. Therefore, ACPI CA does
16202 not support mixed integer widths across different ACPI tables
16205 Fixed a problem where NULL extended fields (X fields) in an ACPI
16206 2.0 ACPI FADT caused the table load to fail. Although the
16207 existing ACPI specification is a bit fuzzy on this topic, the new
16208 behavior is to fall back on a ACPI 1.0 field if the corresponding
16209 ACPI 2.0 X field is zero (even though the table revision indicates
16210 a full ACPI 2.0 table.) The ACPI specification will be updated to
16211 clarify this issue.
16213 Fixed a problem with the SystemMemory operation region handler
16214 where memory was always accessed byte-wise even if the AML-
16215 specified access width was larger than a byte. This caused
16216 problems on systems with memory-mapped I/O. Memory is now
16217 accessed with the width specified. On systems that do not support
16218 non-aligned transfers, a check is made to guarantee proper address
16219 alignment before proceeding in order to avoid an AML-caused
16220 alignment fault within the kernel.
16223 Fixed a problem with the ExtendedIrq resource where only one byte
16224 of the 4-byte Irq field was extracted.
16226 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
16227 function was out of date and required a rewrite.
16229 Code and Data Size: Current core subsystem library sizes are shown
16230 below. These are the code and data sizes for the acpica.lib
16231 produced by the Microsoft Visual C++ 6.0 compiler, and these
16232 values do not include any ACPI driver or OSPM code. The debug
16233 version of the code includes the debug output trace mechanism and
16234 has a larger code and data size. Note that these values will vary
16235 depending on the efficiency of the compiler and the compiler
16236 options used during generation.
16239 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
16240 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
16242 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
16243 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
16248 PCI IRQ routing fixes (Dominik Brodowski)
16251 3) iASL Compiler Version X2042:
16253 Implemented an additional compile-time error check for a field
16254 unit whose size + minimum access width would cause a run-time
16255 access beyond the end-of-region. Previously, only the field size
16256 itself was checked.
16258 The Core subsystem and iASL compiler now share a common parse
16259 object in preparation for compile-time evaluation of the type
16260 3/4/5 ASL operators.
16263 ----------------------------------------
16264 Summary of changes for this release: 03_29_02
16266 1) ACPI CA Core Subsystem Version 20020329:
16268 Implemented support for late evaluation of TermArg operands to
16269 Buffer and Package objects. This allows complex expressions to be
16270 used in the declarations of these object types.
16272 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
16273 1.0, if the field was larger than 32 bits, it was returned as a
16274 buffer - otherwise it was returned as an integer. In ACPI 2.0,
16275 the field is returned as a buffer only if the field is larger than
16276 64 bits. The TableRevision is now considered when making this
16277 conversion to avoid incompatibility with existing ASL code.
16279 Implemented logical addressing for AcpiOsGetRootPointer. This
16280 allows an RSDP with either a logical or physical address. With
16281 this support, the host OS can now override all ACPI tables with
16282 one logical RSDP. Includes implementation of "typed" pointer
16283 support to allow a common data type for both physical and logical
16284 pointers internally. This required a change to the
16285 AcpiOsGetRootPointer interface.
16287 Implemented the use of ACPI 2.0 Generic Address Structures for all
16288 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
16289 mapped I/O for these ACPI features.
16291 Initialization now ignores not only non-required tables (All
16292 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
16293 not validate the table headers of unrecognized tables.
16295 Fixed a problem where a notify handler could only be
16296 installed/removed on an object of type Device. All "notify"
16298 objects are now supported -- Devices, Processor, Power, and
16301 Removed most verbosity from the ACPI_DB_INFO debug level. Only
16302 critical information is returned when this debug level is enabled.
16304 Code and Data Size: Current core subsystem library sizes are shown
16305 below. These are the code and data sizes for the acpica.lib
16306 produced by the Microsoft Visual C++ 6.0 compiler, and these
16307 values do not include any ACPI driver or OSPM code. The debug
16308 version of the code includes the debug output trace mechanism and
16309 has a larger code and data size. Note that these values will vary
16310 depending on the efficiency of the compiler and the compiler
16311 options used during generation.
16314 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
16315 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
16317 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
16318 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
16323 The processor driver (acpi_processor.c) now fully supports ACPI
16324 2.0-based processor performance control (e.g. Intel(R)
16325 SpeedStep(TM) technology) Note that older laptops that only have
16326 the Intel "applet" interface are not supported through this. The
16327 'limit' and 'performance' interface (/proc) are fully functional.
16328 [Note that basic policy for controlling performance state
16329 transitions will be included in the next version of ospmd.] The
16330 idle handler was modified to more aggressively use C2, and PIIX4
16331 errata handling underwent a complete overhaul (big thanks to
16332 Dominik Brodowski).
16334 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
16335 based devices in the ACPI namespace are now dynamically bound
16336 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
16337 This allows, among other things, ACPI to resolve bus numbers for
16338 subordinate PCI bridges.
16340 Enhanced PCI IRQ routing to get the proper bus number for _PRT
16341 entries defined underneath PCI bridges.
16343 Added IBM 600E to bad bios list due to invalid _ADR value for
16344 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
16346 In the process of adding full MADT support (e.g. IOAPIC) for IA32
16347 (acpi.c, mpparse.c) -- stay tuned.
16349 Added back visual differentiation between fixed-feature and
16350 control-method buttons in dmesg. Buttons are also subtyped (e.g.
16351 button/power/PWRF) to simplify button identification.
16353 We no longer use -Wno-unused when compiling debug. Please ignore
16354 any "_THIS_MODULE defined but not used" messages.
16356 Can now shut down the system using "magic sysrq" key.
16359 3) iASL Compiler version 2041:
16361 Fixed a problem where conversion errors for hex/octal/decimal
16362 constants were not reported.
16364 Implemented a fix for the General Register template Address field.
16365 This field was 8 bits when it should be 64.
16367 Fixed a problem where errors/warnings were no longer being emitted
16368 within the listing output file.
16370 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
16371 exactly 4 characters, alphanumeric only.
16376 ----------------------------------------
16377 Summary of changes for this release: 03_08_02
16380 1) ACPI CA Core Subsystem Version 20020308:
16382 Fixed a problem with AML Fields where the use of the "AccessAny"
16383 keyword could cause an interpreter error due to attempting to read
16384 or write beyond the end of the parent Operation Region.
16386 Fixed a problem in the SystemMemory Operation Region handler where
16387 an attempt was made to map memory beyond the end of the region.
16388 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
16389 errors on some Linux systems.
16391 Fixed a problem where the interpreter/namespace "search to root"
16392 algorithm was not functioning for some object types. Relaxed the
16393 internal restriction on the search to allow upsearches for all
16394 external object types as well as most internal types.
16399 We now use safe_halt() macro versus individual calls to sti | hlt.
16401 Writing to the processor limit interface should now work. "echo 1"
16402 will increase the limit, 2 will decrease, and 0 will reset to the
16409 Fixed segfault on Linux version.
16412 ----------------------------------------
16413 Summary of changes for this release: 02_25_02
16415 1) ACPI CA Core Subsystem:
16418 Fixed a problem where the GPE bit masks were not initialized
16419 properly, causing erratic GPE behavior.
16421 Implemented limited support for multiple calling conventions. The
16422 code can be generated with either the VPL (variable parameter
16423 list, or "C") convention, or the FPL (fixed parameter list, or
16424 "Pascal") convention. The core subsystem is about 3.4% smaller
16425 when generated with FPL.
16430 Re-add some /proc/acpi/event functionality that was lost during
16433 Resolved issue with /proc events for fixed-feature buttons showing
16434 up as the system device.
16436 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
16438 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
16440 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
16442 Fixed limit interface & usage to fix bugs with passive cooling
16445 Restructured PRT support.
16448 ----------------------------------------
16449 Summary of changes for this label: 02_14_02
16452 1) ACPI CA Core Subsystem:
16454 Implemented support in AcpiLoadTable to allow loading of FACS and
16457 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
16458 been removed. All 64-bit platforms should be migrated to the ACPI
16459 2.0 tables. The actbl71.h header has been removed from the source
16462 All C macros defined within the subsystem have been prefixed with
16463 "ACPI_" to avoid collision with other system include files.
16465 Removed the return value for the two AcpiOsPrint interfaces, since
16466 it is never used and causes lint warnings for ignoring the return
16469 Added error checking to all internal mutex acquire and release
16470 calls. Although a failure from one of these interfaces is
16471 probably a fatal system error, these checks will cause the
16472 immediate abort of the currently executing method or interface.
16474 Fixed a problem where the AcpiSetCurrentResources interface could
16475 fault. This was a side effect of the deployment of the new memory
16478 Fixed a couple of problems with the Global Lock support introduced
16479 in the last major build. The "common" (1.0/2.0) internal FACS was
16480 being overwritten with the FACS signature and clobbering the
16481 Global Lock pointer. Also, the actual firmware FACS was being
16482 unmapped after construction of the "common" FACS, preventing
16483 access to the actual Global Lock field within it. The "common"
16484 internal FACS is no longer installed as an actual ACPI table; it
16485 is used simply as a global.
16487 Code and Data Size: Current core subsystem library sizes are shown
16488 below. These are the code and data sizes for the acpica.lib
16489 produced by the Microsoft Visual C++ 6.0 compiler, and these
16490 values do not include any ACPI driver or OSPM code. The debug
16491 version of the code includes the debug output trace mechanism and
16492 has a larger code and data size. Note that these values will vary
16493 depending on the efficiency of the compiler and the compiler
16494 options used during generation.
16496 Previous Release (02_07_01)
16497 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
16498 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
16500 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
16501 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
16506 Updated Linux-specific code for core macro and OSL interface
16507 changes described above.
16509 Improved /proc/acpi/event. It now can be opened only once and has
16510 proper poll functionality.
16512 Fixed and restructured power management (acpi_bus).
16514 Only create /proc "view by type" when devices of that class exist.
16516 Fixed "charging/discharging" bug (and others) in acpi_battery.
16518 Improved thermal zone code.
16521 3) ASL Compiler, version X2039:
16524 Implemented the new compiler restriction on ASL String hex/octal
16525 escapes to non-null, ASCII values. An error results if an invalid
16526 value is used. (This will require an ACPI 2.0 specification
16529 AML object labels that are output to the optional C and ASM source
16530 are now prefixed with both the ACPI table signature and table ID
16531 to help guarantee uniqueness within a large BIOS project.
16534 ----------------------------------------
16535 Summary of changes for this label: 02_01_02
16537 1) ACPI CA Core Subsystem:
16539 ACPI 2.0 support is complete in the entire Core Subsystem and the
16540 ASL compiler. All new ACPI 2.0 operators are implemented and all
16541 other changes for ACPI 2.0 support are complete. With
16542 simultaneous code and data optimizations throughout the subsystem,
16543 ACPI 2.0 support has been implemented with almost no additional
16544 cost in terms of code and data size.
16546 Implemented a new mechanism for allocation of return buffers. If
16547 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
16548 be allocated on behalf of the caller. Consolidated all return
16549 buffer validation and allocation to a common procedure. Return
16550 buffers will be allocated via the primary OSL allocation interface
16551 since it appears that a separate pool is not needed by most users.
16552 If a separate pool is required for these buffers, the caller can
16553 still use the original mechanism and pre-allocate the buffer(s).
16555 Implemented support for string operands within the DerefOf
16558 Restructured the Hardware and Event managers to be table driven,
16559 simplifying the source code and reducing the amount of generated
16562 Split the common read/write low-level ACPI register bitfield
16563 procedure into a separate read and write, simplifying the code
16566 Obsoleted the AcpiOsCallocate OSL interface. This interface was
16567 used only a handful of times and didn't have enough critical mass
16568 for a separate interface. Replaced with a common calloc procedure
16571 Fixed a reported problem with the GPE number mapping mechanism
16572 that allows GPE1 numbers to be non-contiguous with GPE0.
16573 Reorganized the GPE information and shrunk a large array that was
16574 originally large enough to hold info for all possible GPEs (256)
16575 to simply large enough to hold all GPEs up to the largest GPE
16576 number on the machine.
16578 Fixed a reported problem with resource structure alignment on 64-
16581 Changed the AcpiEnableEvent and AcpiDisableEvent external
16582 interfaces to not require any flags for the common case of
16583 enabling/disabling a GPE.
16585 Implemented support to allow a "Notify" on a Processor object.
16587 Most TBDs in comments within the source code have been resolved
16591 Fixed a problem in the interpreter where a standalone parent
16592 prefix (^) was not handled correctly in the interpreter and
16595 Removed obsolete and unnecessary GPE save/restore code.
16597 Implemented Field support in the ASL Load operator. This allows a
16598 table to be loaded from a named field, in addition to loading a
16599 table directly from an Operation Region.
16601 Implemented timeout and handle support in the external Global Lock
16604 Fixed a problem in the AcpiDump utility where pathnames were no
16605 longer being generated correctly during the dump of named objects.
16607 Modified the AML debugger to give a full display of if/while
16608 predicates instead of just one AML opcode at a time. (The
16609 predicate can have several nested ASL statements.) The old method
16610 was confusing during single stepping.
16612 Code and Data Size: Current core subsystem library sizes are shown
16613 below. These are the code and data sizes for the acpica.lib
16614 produced by the Microsoft Visual C++ 6.0 compiler, and these
16615 values do not include any ACPI driver or OSPM code. The debug
16616 version of the code includes the debug output trace mechanism and
16617 has a larger code and data size. Note that these values will vary
16618 depending on the efficiency of the compiler and the compiler
16619 options used during generation.
16621 Previous Release (12_18_01)
16622 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
16623 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
16625 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
16626 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
16630 Implemented fix for PIIX reverse throttling errata (Processor
16633 Added new Limit interface (Processor and Thermal drivers)
16635 New thermal policy (Thermal driver)
16637 Many updates to /proc
16639 Battery "low" event support (Battery driver)
16641 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
16643 IA32 - IA64 initialization unification, no longer experimental
16645 Menuconfig options redesigned
16647 3) ASL Compiler, version X2037:
16649 Implemented several new output features to simplify integration of
16650 AML code into firmware: 1) Output the AML in C source code with
16651 labels for each named ASL object. The original ASL source code
16652 is interleaved as C comments. 2) Output the AML in ASM source code
16653 with labels and interleaved ASL source. 3) Output the AML in
16654 raw hex table form, in either C or ASM.
16656 Implemented support for optional string parameters to the
16657 LoadTable operator.
16659 Completed support for embedded escape sequences within string
16660 literals. The compiler now supports all single character escapes
16661 as well as the Octal and Hex escapes. Note: the insertion of a
16662 null byte into a string literal (via the hex/octal escape) causes
16663 the string to be immediately terminated. A warning is issued.
16665 Fixed a problem where incorrect AML was generated for the case
16666 where an ASL namepath consists of a single parent prefix (
16668 ) with no trailing name segments.
16670 The compiler has been successfully generated with a 64-bit C
16676 ----------------------------------------
16677 Summary of changes for this label: 12_18_01
16681 Enhanced blacklist with reason and severity fields. Any table's
16682 signature may now be used to identify a blacklisted system.
16684 Call _PIC control method to inform the firmware which interrupt
16685 model the OS is using. Turn on any disabled link devices.
16687 Cleaned up busmgr /proc error handling (Andreas Dilger)
16689 2) ACPI CA Core Subsystem:
16691 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
16694 Completed implementation of the ACPI 2.0 "Continue",
16695 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
16696 operators. All new ACPI 2.0 operators are now implemented in both
16697 the ASL compiler and the AML interpreter. The only remaining ACPI
16698 2.0 task is support for the String data type in the DerefOf
16699 operator. Fixed a problem with AcquireMutex where the status code
16700 was lost if the caller had to actually wait for the mutex.
16702 Increased the maximum ASL Field size from 64K bits to 4G bits.
16704 Completed implementation of the external Global Lock interfaces --
16705 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
16706 Handler parameters were added.
16708 Completed another pass at removing warnings and issues when
16709 compiling with 64-bit compilers. The code now compiles cleanly
16710 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
16711 add and subtract (diff) macros have changed considerably.
16714 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
16715 64-bit platforms, 32-bits on all others. This type is used
16716 wherever memory allocation and/or the C sizeof() operator is used,
16717 and affects the OSL memory allocation interfaces AcpiOsAllocate
16718 and AcpiOsCallocate.
16720 Implemented sticky user breakpoints in the AML debugger.
16722 Code and Data Size: Current core subsystem library sizes are shown
16723 below. These are the code and data sizes for the acpica.lib
16724 produced by the Microsoft Visual C++ 6.0 compiler, and these
16725 values do not include any ACPI driver or OSPM code. The debug
16726 version of the code includes the debug output trace mechanism and
16727 has a larger code and data size. Note that these values will vary
16728 depending on the efficiency of the compiler and the compiler
16729 options used during generation.
16731 Previous Release (12_05_01)
16732 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
16733 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
16735 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
16736 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
16738 3) ASL Compiler, version X2034:
16740 Now checks for (and generates an error if detected) the use of a
16741 Break or Continue statement without an enclosing While statement.
16744 Successfully generated the compiler with the Intel 64-bit C
16747 ----------------------------------------
16748 Summary of changes for this label: 12_05_01
16750 1) ACPI CA Core Subsystem:
16752 The ACPI 2.0 CopyObject operator is fully implemented. This
16753 operator creates a new copy of an object (and is also used to
16754 bypass the "implicit conversion" mechanism of the Store operator.)
16756 The ACPI 2.0 semantics for the SizeOf operator are fully
16757 implemented. The change is that performing a SizeOf on a
16758 reference object causes an automatic dereference of the object to
16759 tha actual value before the size is evaluated. This behavior was
16760 undefined in ACPI 1.0.
16762 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
16763 have been implemented. The interrupt polarity and mode are now
16766 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
16767 appearing in Package objects were not properly converted to
16768 integers when the internal Package was converted to an external
16769 object (via the AcpiEvaluateObject interface.)
16771 Fixed a problem with the namespace object deletion mechanism for
16772 objects created by control methods. There were two parts to this
16773 problem: 1) Objects created during the initialization phase method
16774 parse were not being deleted, and 2) The object owner ID mechanism
16775 to track objects was broken.
16777 Fixed a problem where the use of the ASL Scope operator within a
16778 control method would result in an invalid opcode exception.
16780 Fixed a problem introduced in the previous label where the buffer
16781 length required for the _PRT structure was not being returned
16784 Code and Data Size: Current core subsystem library sizes are shown
16785 below. These are the code and data sizes for the acpica.lib
16786 produced by the Microsoft Visual C++ 6.0 compiler, and these
16787 values do not include any ACPI driver or OSPM code. The debug
16788 version of the code includes the debug output trace mechanism and
16789 has a larger code and data size. Note that these values will vary
16790 depending on the efficiency of the compiler and the compiler
16791 options used during generation.
16793 Previous Release (11_20_01)
16794 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
16795 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
16798 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
16799 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
16803 Updated all files to apply cleanly against 2.4.16.
16805 Added basic PCI Interrupt Routing Table (PRT) support for IA32
16806 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
16807 version supports both static and dyanmic PRT entries, but dynamic
16808 entries are treated as if they were static (not yet
16809 reconfigurable). Architecture- specific code to use this data is
16810 absent on IA32 but should be available shortly.
16812 Changed the initialization sequence to start the ACPI interpreter
16813 (acpi_init) prior to initialization of the PCI driver (pci_init)
16814 in init/main.c. This ordering is required to support PRT and
16815 facilitate other (future) enhancement. A side effect is that the
16816 ACPI bus driver and certain device drivers can no longer be loaded
16819 Modified the 'make menuconfig' options to allow PCI Interrupt
16820 Routing support to be included without the ACPI Bus and other
16823 3) ASL Compiler, version X2033:
16825 Fixed some issues with the use of the new CopyObject and
16826 DataTableRegion operators. Both are fully functional.
16828 ----------------------------------------
16829 Summary of changes for this label: 11_20_01
16831 20 November 2001. Summary of changes for this release.
16833 1) ACPI CA Core Subsystem:
16835 Updated Index support to match ACPI 2.0 semantics. Storing a
16836 Integer, String, or Buffer to an Index of a Buffer will store only
16837 the least-significant byte of the source to the Indexed buffer
16838 byte. Multiple writes are not performed.
16840 Fixed a problem where the access type used in an AccessAs ASL
16841 operator was not recorded correctly into the field object.
16843 Fixed a problem where ASL Event objects were created in a
16844 signalled state. Events are now created in an unsignalled state.
16846 The internal object cache is now purged after table loading and
16847 initialization to reduce the use of dynamic kernel memory -- on
16848 the assumption that object use is greatest during the parse phase
16849 of the entire table (versus the run-time use of individual control
16852 ACPI 2.0 variable-length packages are now fully operational.
16854 Code and Data Size: Code and Data optimizations have permitted new
16855 feature development with an actual reduction in the library size.
16856 Current core subsystem library sizes are shown below. These are
16857 the code and data sizes for the acpica.lib produced by the
16858 Microsoft Visual C++ 6.0 compiler, and these values do not include
16859 any ACPI driver or OSPM code. The debug version of the code
16860 includes the debug output trace mechanism and has a larger code
16861 and data size. Note that these values will vary depending on the
16862 efficiency of the compiler and the compiler options used during
16865 Previous Release (11_09_01):
16866 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
16867 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
16870 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
16871 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
16875 Enhanced the ACPI boot-time initialization code to allow the use
16876 of Local APIC tables for processor enumeration on IA-32, and to
16877 pave the way for a fully MPS-free boot (on SMP systems) in the
16878 near future. This functionality replaces
16879 arch/i386/kernel/acpitables.c, which was introduced in an earlier
16880 2.4.15-preX release. To enable this feature you must add
16881 "acpi_boot=on" to the kernel command line -- see the help entry
16882 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
16885 Restructured the configuration options to allow boot-time table
16886 parsing support without inclusion of the ACPI Interpreter (and
16889 NOTE: This release does not include fixes for the reported events,
16890 power-down, and thermal passive cooling issues (coming soon).
16894 Added additional typechecking for Fields within restricted access
16895 Operation Regions. All fields within EC and CMOS regions must be
16896 declared with ByteAcc. All fields withing SMBus regions must be
16897 declared with the BufferAcc access type.
16899 Fixed a problem where the listing file output of control methods
16900 no longer interleaved the actual AML code with the ASL source
16906 ----------------------------------------
16907 Summary of changes for this label: 11_09_01
16909 1) ACPI CA Core Subsystem:
16911 Implemented ACPI 2.0-defined support for writes to fields with a
16912 Buffer, String, or Integer source operand that is smaller than the
16913 target field. In these cases, the source operand is zero-extended
16914 to fill the target field.
16916 Fixed a problem where a Field starting bit offset (within the
16917 parent operation region) was calculated incorrectly if the
16919 alignment of the field differed from the access width. This
16920 affected CreateWordField, CreateDwordField, CreateQwordField, and
16921 possibly other fields that use the "AccessAny" keyword.
16923 Fixed a problem introduced in the 11_02_01 release where indirect
16924 stores through method arguments did not operate correctly.
16928 Implemented boot-time ACPI table parsing support
16929 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
16930 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
16931 legacy BIOS interfaces (e.g. MPS) for the configuration of system
16932 processors, memory, and interrupts during setup_arch(). Note that
16933 this patch does not include the required architecture-specific
16934 changes required to apply this information -- subsequent patches
16935 will be posted for both IA32 and IA64 to achieve this.
16937 Added low-level sleep support for IA32 platforms, courtesy of Pat
16938 Mochel. This allows IA32 systems to transition to/from various
16939 sleeping states (e.g. S1, S3), although the lack of a centralized
16940 driver model and power-manageable drivers will prevent its
16941 (successful) use on most systems.
16943 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
16944 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
16945 tables" option, etc.
16947 Increased the default timeout for the EC driver from 1ms to 10ms
16948 (1000 cycles of 10us) to try to address AE_TIME errors during EC
16951 ----------------------------------------
16952 Summary of changes for this label: 11_02_01
16954 1) ACPI CA Core Subsystem:
16956 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
16957 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
16960 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
16961 changes to support ACPI 2.0 Qword field access. Read/Write
16962 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
16963 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
16964 the value parameter for the address space handler interface is now
16965 an ACPI_INTEGER. OSL implementations of these interfaces must now
16966 handle the case where the Width parameter is 64.
16968 Index Fields: Fixed a problem where unaligned bit assembly and
16969 disassembly for IndexFields was not supported correctly.
16971 Index and Bank Fields: Nested Index and Bank Fields are now
16972 supported. During field access, a check is performed to ensure
16973 that the value written to an Index or Bank register is not out of
16974 the range of the register. The Index (or Bank) register is
16975 written before each access to the field data. Future support will
16976 include allowing individual IndexFields to be wider than the
16977 DataRegister width.
16979 Fields: Fixed a problem where the AML interpreter was incorrectly
16980 attempting to write beyond the end of a Field/OpRegion. This was
16981 a boundary case that occurred when a DWORD field was written to a
16982 BYTE access OpRegion, forcing multiple writes and causing the
16983 interpreter to write one datum too many.
16985 Fields: Fixed a problem with Field/OpRegion access where the
16986 starting bit address of a field was incorrectly calculated if the
16987 current access type was wider than a byte (WordAcc, DwordAcc, or
16990 Fields: Fixed a problem where forward references to individual
16991 FieldUnits (individual Field names within a Field definition) were
16992 not resolved during the AML table load.
16994 Fields: Fixed a problem where forward references from a Field
16995 definition to the parent Operation Region definition were not
16996 resolved during the AML table load.
16998 Fields: Duplicate FieldUnit names within a scope are now detected
16999 during AML table load.
17001 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
17002 returned an incorrect name for the root node.
17004 Code and Data Size: Code and Data optimizations have permitted new
17005 feature development with an actual reduction in the library size.
17006 Current core subsystem library sizes are shown below. These are
17007 the code and data sizes for the acpica.lib produced by the
17008 Microsoft Visual C++ 6.0 compiler, and these values do not include
17009 any ACPI driver or OSPM code. The debug version of the code
17010 includes the debug output trace mechanism and has a larger code
17011 and data size. Note that these values will vary depending on the
17012 efficiency of the compiler and the compiler options used during
17015 Previous Release (10_18_01):
17016 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
17017 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
17020 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
17021 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
17025 Improved /proc processor output (Pavel Machek) Re-added
17026 MODULE_LICENSE("GPL") to all modules.
17028 3) ASL Compiler version X2030:
17030 Duplicate FieldUnit names within a scope are now detected and
17035 Programmer Reference updated to reflect OSL and address space
17036 handler interface changes described above.
17038 ----------------------------------------
17039 Summary of changes for this label: 10_18_01
17041 ACPI CA Core Subsystem:
17043 Fixed a problem with the internal object reference count mechanism
17044 that occasionally caused premature object deletion. This resolves
17045 all of the outstanding problem reports where an object is deleted
17046 in the middle of an interpreter evaluation. Although this problem
17047 only showed up in rather obscure cases, the solution to the
17048 problem involved an adjustment of all reference counts involving
17049 objects attached to namespace nodes.
17051 Fixed a problem with Field support in the interpreter where
17052 writing to an aligned field whose length is an exact multiple (2
17053 or greater) of the field access granularity would cause an attempt
17054 to write beyond the end of the field.
17056 The top level AML opcode execution functions within the
17057 interpreter have been renamed with a more meaningful and
17058 consistent naming convention. The modules exmonad.c and
17059 exdyadic.c were eliminated. New modules are exoparg1.c,
17060 exoparg2.c, exoparg3.c, and exoparg6.c.
17062 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
17064 Fixed a problem where the AML debugger was causing some internal
17065 objects to not be deleted during subsystem termination.
17067 Fixed a problem with the external AcpiEvaluateObject interface
17068 where the subsystem would fault if the named object to be
17069 evaluated refered to a constant such as Zero, Ones, etc.
17071 Fixed a problem with IndexFields and BankFields where the
17072 subsystem would fault if the index, data, or bank registers were
17073 not defined in the same scope as the field itself.
17075 Added printf format string checking for compilers that support
17076 this feature. Corrected more than 50 instances of issues with
17077 format specifiers within invocations of ACPI_DEBUG_PRINT
17078 throughout the core subsystem code.
17080 The ASL "Revision" operator now returns the ACPI support level
17081 implemented in the core - the value "2" since the ACPI 2.0 support
17082 is more than 50% implemented.
17084 Enhanced the output of the AML debugger "dump namespace" command
17085 to output in a more human-readable form.
17087 Current core subsystem library code sizes are shown below. These
17089 are the code and data sizes for the acpica.lib produced by the
17090 Microsoft Visual C++ 6.0 compiler, and these values do not include
17091 any ACPI driver or OSPM code. The debug version of the code
17092 includes the full debug trace mechanism -- leading to a much
17094 larger code and data size. Note that these values will vary
17095 depending on the efficiency of the compiler and the compiler
17096 options used during generation.
17098 Previous Label (09_20_01):
17099 Non-Debug Version: 65K Code, 5K Data, 70K Total
17100 Debug Version: 138K Code, 58K Data, 196K Total
17104 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
17105 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
17109 Implemented a "Bad BIOS Blacklist" to track machines that have
17110 known ASL/AML problems.
17112 Enhanced the /proc interface for the thermal zone driver and added
17113 support for _HOT (the critical suspend trip point). The 'info'
17114 file now includes threshold/policy information, and allows setting
17115 of _SCP (cooling preference) and _TZP (polling frequency) values
17116 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
17117 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
17118 preference to the passive/quiet mode (if supported by the ASL).
17120 Implemented a workaround for a gcc bug that resuted in an OOPs
17121 when loading the control method battery driver.
17123 ----------------------------------------
17124 Summary of changes for this label: 09_20_01
17126 ACPI CA Core Subsystem:
17128 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
17129 modified to allow individual GPE levels to be flagged as wake-
17130 enabled (i.e., these GPEs are to remain enabled when the platform
17133 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
17134 support wake-enabled GPEs. This means that upon entering the
17135 sleep state, all GPEs that are not wake-enabled are disabled.
17136 When leaving the sleep state, these GPEs are reenabled.
17138 A local double-precision divide/modulo module has been added to
17139 enhance portability to OS kernels where a 64-bit math library is
17140 not available. The new module is "utmath.c".
17142 Several optimizations have been made to reduce the use of CPU
17143 stack. Originally over 2K, the maximum stack usage is now below
17144 2K at 1860 bytes (1.82k)
17146 Fixed a problem with the AcpiGetFirmwareTable interface where the
17147 root table pointer was not mapped into a logical address properly.
17149 Fixed a problem where a NULL pointer was being dereferenced in the
17150 interpreter code for the ASL Notify operator.
17152 Fixed a problem where the use of the ASL Revision operator
17153 returned an error. This operator now returns the current version
17154 of the ACPI CA core subsystem.
17156 Fixed a problem where objects passed as control method parameters
17157 to AcpiEvaluateObject were always deleted at method termination.
17158 However, these objects may end up being stored into the namespace
17159 by the called method. The object reference count mechanism was
17160 applied to these objects instead of a force delete.
17162 Fixed a problem where static strings or buffers (contained in the
17163 AML code) that are declared as package elements within the ASL
17164 code could cause a fault because the interpreter would attempt to
17165 delete them. These objects are now marked with the "static
17166 object" flag to prevent any attempt to delete them.
17168 Implemented an interpreter optimization to use operands directly
17169 from the state object instead of extracting the operands to local
17170 variables. This reduces stack use and code size, and improves
17173 The module exxface.c was eliminated as it was an unnecessary extra
17176 Current core subsystem library code sizes are shown below. These
17177 are the code and data sizes for the acpica.lib produced by the
17178 Microsoft Visual C++ 6.0 compiler, and these values do not include
17179 any ACPI driver or OSPM code. The debug version of the code
17180 includes the full debug trace mechanism -- leading to a much
17181 larger code and data size. Note that these values will vary
17182 depending on the efficiency of the compiler and the compiler
17183 options used during generation.
17185 Non-Debug Version: 65K Code, 5K Data, 70K Total
17186 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
17187 Total (Previously 195K)
17191 Support for ACPI 2.0 64-bit integers has been added. All ACPI
17192 Integer objects are now 64 bits wide
17194 All Acpi data types and structures are now in lower case. Only
17195 Acpi macros are upper case for differentiation.
17199 Changes to the external interfaces as described above.
17201 ----------------------------------------
17202 Summary of changes for this label: 08_31_01
17204 ACPI CA Core Subsystem:
17206 A bug with interpreter implementation of the ASL Divide operator
17207 was found and fixed. The implicit function return value (not the
17208 explicit store operands) was returning the remainder instead of
17209 the quotient. This was a longstanding bug and it fixes several
17210 known outstanding issues on various platforms.
17212 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
17213 been further optimized for size. There are 700 invocations of the
17214 DEBUG_PRINT macro alone, so each optimization reduces the size of
17215 the debug version of the subsystem significantly.
17217 A stack trace mechanism has been implemented. The maximum stack
17218 usage is about 2K on 32-bit platforms. The debugger command "stat
17219 stack" will display the current maximum stack usage.
17221 All public symbols and global variables within the subsystem are
17222 now prefixed with the string "Acpi". This keeps all of the
17223 symbols grouped together in a kernel map, and avoids conflicts
17224 with other kernel subsystems.
17226 Most of the internal fixed lookup tables have been moved into the
17227 code segment via the const operator.
17229 Several enhancements have been made to the interpreter to both
17230 reduce the code size and improve performance.
17232 Current core subsystem library code sizes are shown below. These
17233 are the code and data sizes for the acpica.lib produced by the
17234 Microsoft Visual C++ 6.0 compiler, and these values do not include
17235 any ACPI driver or OSPM code. The debug version of the code
17236 includes the full debug trace mechanism which contains over 700
17237 invocations of the DEBUG_PRINT macro, 500 function entry macro
17238 invocations, and over 900 function exit macro invocations --
17239 leading to a much larger code and data size. Note that these
17240 values will vary depending on the efficiency of the compiler and
17241 the compiler options used during generation.
17243 Non-Debug Version: 64K Code, 5K Data, 69K Total
17244 Debug Version: 137K Code, 58K Data, 195K Total
17248 Implemented wbinvd() macro, pending a kernel-wide definition.
17250 Fixed /proc/acpi/event to handle poll() and short reads.
17252 ASL Compiler, version X2026:
17254 Fixed a problem introduced in the previous label where the AML
17256 code emitted for package objects produced packages with zero
17259 ----------------------------------------
17260 Summary of changes for this label: 08_16_01
17262 ACPI CA Core Subsystem:
17264 The following ACPI 2.0 ASL operators have been implemented in the
17265 AML interpreter (These are already supported by the Intel ASL
17266 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
17267 ToBuffer. Support for 64-bit AML constants is implemented in the
17268 AML parser, debugger, and disassembler.
17270 The internal memory tracking mechanism (leak detection code) has
17271 been upgraded to reduce the memory overhead (a separate tracking
17272 block is no longer allocated for each memory allocation), and now
17273 supports all of the internal object caches.
17275 The data structures and code for the internal object caches have
17276 been coelesced and optimized so that there is a single cache and
17277 memory list data structure and a single group of functions that
17278 implement generic cache management. This has reduced the code
17279 size in both the debug and release versions of the subsystem.
17281 The DEBUG_PRINT macro(s) have been optimized for size and replaced
17282 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
17283 different, because it generates a single call to an internal
17284 function. This results in a savings of about 90 bytes per
17285 invocation, resulting in an overall code and data savings of about
17286 16% in the debug version of the subsystem.
17290 Fixed C3 disk corruption problems and re-enabled C3 on supporting
17293 Integrated low-level sleep code by Patrick Mochel.
17295 Further tweaked source code Linuxization.
17301 Support for ACPI 2.0 variable length packages is fixed/completed.
17303 Fixed a problem where the optional length parameter for the ACPI
17304 2.0 ToString operator.
17306 Fixed multiple extraneous error messages when a syntax error is
17307 detected within the declaration line of a control method.
17309 ----------------------------------------
17310 Summary of changes for this label: 07_17_01
17312 ACPI CA Core Subsystem:
17314 Added a new interface named AcpiGetFirmwareTable to obtain any
17315 ACPI table via the ACPI signature. The interface can be called at
17316 any time during kernel initialization, even before the kernel
17317 virtual memory manager is initialized and paging is enabled. This
17318 allows kernel subsystems to obtain ACPI tables very early, even
17319 before the ACPI CA subsystem is initialized.
17321 Fixed a problem where Fields defined with the AnyAcc attribute
17322 could be resolved to the incorrect address under the following
17323 conditions: 1) the field width is larger than 8 bits and 2) the
17324 parent operation region is not defined on a DWORD boundary.
17326 Fixed a problem where the interpreter is not being locked during
17327 namespace initialization (during execution of the _INI control
17328 methods), causing an error when an attempt is made to release it
17331 ACPI 2.0 support in the AML Interpreter has begun and will be
17332 ongoing throughout the rest of this year. In this label, The Mod
17333 operator is implemented.
17335 Added a new data type to contain full PCI addresses named
17336 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
17337 and Function values.
17341 Enhanced the Linux version of the source code to change most
17342 capitalized ACPI type names to lowercase. For example, all
17343 instances of ACPI_STATUS are changed to acpi_status. This will
17344 result in a large diff, but the change is strictly cosmetic and
17345 aligns the CA code closer to the Linux coding standard.
17349 The interfaces to the PCI configuration space have been changed to
17350 add the PCI Segment number and to split the single 32-bit combined
17351 DeviceFunction field into two 16-bit fields. This was
17352 accomplished by moving the four values that define an address in
17353 PCI configuration space (segment, bus, device, and function) to
17354 the new ACPI_PCI_ID structure.
17356 The changes to the PCI configuration space interfaces led to a
17357 reexamination of the complete set of address space access
17358 interfaces for PCI, I/O, and Memory. The previously existing 18
17359 interfaces have proven difficult to maintain (any small change
17360 must be propagated across at least 6 interfaces) and do not easily
17361 allow for future expansion to 64 bits if necessary. Also, on some
17362 systems, it would not be appropriate to demultiplex the access
17363 width (8, 16, 32,or 64) before calling the OSL if the
17364 corresponding native OS interfaces contain a similar access width
17365 parameter. For these reasons, the 18 address space interfaces
17366 have been replaced by these 6 new ones:
17368 AcpiOsReadPciConfiguration
17369 AcpiOsWritePciConfiguration
17375 Added a new interface named AcpiOsGetRootPointer to allow the OSL
17376 to perform the platform and/or OS-specific actions necessary to
17377 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
17378 interface will simply call down to the CA core to perform the low-
17379 memory search for the table. On IA-64, the RSDP is obtained from
17380 EFI. Migrating this interface to the OSL allows the CA core to
17382 remain OS and platform independent.
17384 Added a new interface named AcpiOsSignal to provide a generic
17385 "function code and pointer" interface for various miscellaneous
17386 signals and notifications that must be made to the host OS. The
17387 first such signals are intended to support the ASL Fatal and
17388 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
17389 interface has been obsoleted.
17391 The definition of the AcpiFormatException interface has been
17392 changed to simplify its use. The caller no longer must supply a
17393 buffer to the call; A pointer to a const string is now returned
17394 directly. This allows the call to be easily used in printf
17395 statements, etc. since the caller does not have to manage a local
17399 ASL Compiler, Version X2025:
17401 The ACPI 2.0 Switch/Case/Default operators have been implemented
17402 and are fully functional. They will work with all ACPI 1.0
17403 interpreters, since the operators are simply translated to If/Else
17406 The ACPI 2.0 ElseIf operator is implemented and will also work
17407 with 1.0 interpreters, for the same reason.
17409 Implemented support for ACPI 2.0 variable-length packages. These
17410 packages have a separate opcode, and their size is determined by
17411 the interpreter at run-time.
17413 Documentation The ACPI CA Programmer Reference has been updated to
17414 reflect the new interfaces and changes to existing interfaces.
17416 ------------------------------------------
17417 Summary of changes for this label: 06_15_01
17419 ACPI CA Core Subsystem:
17421 Fixed a problem where a DWORD-accessed field within a Buffer
17422 object would get its byte address inadvertently rounded down to
17423 the nearest DWORD. Buffers are always Byte-accessible.
17425 ASL Compiler, version X2024:
17427 Fixed a problem where the Switch() operator would either fault or
17428 hang the compiler. Note however, that the AML code for this ACPI
17429 2.0 operator is not yet implemented.
17431 Compiler uses the new AcpiOsGetTimer interface to obtain compile
17434 Implementation of the CreateField operator automatically converts
17435 a reference to a named field within a resource descriptor from a
17436 byte offset to a bit offset if required.
17438 Added some missing named fields from the resource descriptor
17439 support. These are the names that are automatically created by the
17440 compiler to reference fields within a descriptor. They are only
17441 valid at compile time and are not passed through to the AML
17444 Resource descriptor named fields are now typed as Integers and
17445 subject to compile-time typechecking when used in expressions.
17447 ------------------------------------------
17448 Summary of changes for this label: 05_18_01
17450 ACPI CA Core Subsystem:
17452 Fixed a couple of problems in the Field support code where bits
17453 from adjacent fields could be returned along with the proper field
17454 bits. Restructured the field support code to improve performance,
17455 readability and maintainability.
17457 New DEBUG_PRINTP macro automatically inserts the procedure name
17458 into the output, saving hundreds of copies of procedure name
17459 strings within the source, shrinking the memory footprint of the
17460 debug version of the core subsystem.
17462 Source Code Structure:
17464 The source code directory tree was restructured to reflect the
17465 current organization of the component architecture. Some files
17466 and directories have been moved and/or renamed.
17470 Fixed leaking kacpidpc processes.
17472 Fixed queueing event data even when /proc/acpi/event is not
17475 ASL Compiler, version X2020:
17477 Memory allocation performance enhancement - over 24X compile time
17478 improvement on large ASL files. Parse nodes and namestring
17479 buffers are now allocated from a large internal compiler buffer.
17481 The temporary .SRC file is deleted unless the "-s" option is
17484 The "-d" debug output option now sends all output to the .DBG file
17485 instead of the console.
17487 "External" second parameter is now optional
17489 "ElseIf" syntax now properly allows the predicate
17491 Last operand to "Load" now recognized as a Target operand
17493 Debug object can now be used anywhere as a normal object.
17495 ResourceTemplate now returns an object of type BUFFER
17497 EISAID now returns an object of type INTEGER
17499 "Index" now works with a STRING operand
17501 "LoadTable" now accepts optional parameters
17503 "ToString" length parameter is now optional
17505 "Interrupt (ResourceType," parse error fixed.
17507 "Register" with a user-defined region space parse error fixed
17509 Escaped backslash at the end of a string ("\\") scan/parse error
17512 "Revision" is now an object of type INTEGER.
17516 ------------------------------------------
17517 Summary of changes for this label: 05_02_01
17521 /proc/acpi/event now blocks properly.
17523 Removed /proc/sys/acpi. You can still dump your DSDT from
17526 ACPI CA Core Subsystem:
17528 Fixed a problem introduced in the previous label where some of the
17529 "small" resource descriptor types were not recognized.
17531 Improved error messages for the case where an ASL Field is outside
17532 the range of the parent operation region.
17534 ASL Compiler, version X2018:
17537 Added error detection for ASL Fields that extend beyond the length
17538 of the parent operation region (only if the length of the region
17539 is known at compile time.) This includes fields that have a
17540 minimum access width that is smaller than the parent region, and
17541 individual field units that are partially or entirely beyond the
17542 extent of the parent.
17546 ------------------------------------------
17547 Summary of changes for this label: 04_27_01
17549 ACPI CA Core Subsystem:
17551 Fixed a problem where the namespace mutex could be released at the
17552 wrong time during execution of AcpiRemoveAddressSpaceHandler.
17554 Added optional thread ID output for debug traces, to simplify
17555 debugging of multiple threads. Added context switch notification
17556 when the debug code realizes that a different thread is now
17557 executing ACPI code.
17559 Some additional external data types have been prefixed with the
17560 string "ACPI_" for consistency. This may effect existing code.
17561 The data types affected are the external callback typedefs - e.g.,
17563 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
17567 Fixed an issue with the OSL semaphore implementation where a
17568 thread was waking up with an error from receiving a SIGCHLD
17571 Linux version of ACPI CA now uses the system C library for string
17572 manipulation routines instead of a local implementation.
17574 Cleaned up comments and removed TBDs.
17576 ASL Compiler, version X2017:
17578 Enhanced error detection and reporting for all file I/O
17583 Programmer Reference updated to version 1.06.
17587 ------------------------------------------
17588 Summary of changes for this label: 04_13_01
17590 ACPI CA Core Subsystem:
17592 Restructured support for BufferFields and RegionFields.
17593 BankFields support is now fully operational. All known 32-bit
17594 limitations on field sizes have been removed. Both BufferFields
17595 and (Operation) RegionFields are now supported by the same field
17598 Resource support now supports QWORD address and IO resources. The
17599 16/32/64 bit address structures and the Extended IRQ structure
17600 have been changed to properly handle Source Resource strings.
17602 A ThreadId of -1 is now used to indicate a "mutex not acquired"
17603 condition internally and must never be returned by AcpiOsThreadId.
17604 This reserved value was changed from 0 since Unix systems allow a
17609 Driver code reorganized to enhance portability
17611 Added a kernel configuration option to control ACPI_DEBUG
17613 Fixed the EC driver to honor _GLK.
17615 ASL Compiler, version X2016:
17617 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
17618 address space was set to 0, not 0x7f as it should be.
17620 ------------------------------------------
17621 Summary of changes for this label: 03_13_01
17623 ACPI CA Core Subsystem:
17625 During ACPI initialization, the _SB_._INI method is now run if
17628 Notify handler fix - notifies are deferred until the parent method
17629 completes execution. This fixes the "mutex already acquired"
17630 issue seen occasionally.
17632 Part of the "implicit conversion" rules in ACPI 2.0 have been
17633 found to cause compatibility problems with existing ASL/AML. The
17634 convert "result-to-target-type" implementation has been removed
17635 for stores to method Args and Locals. Source operand conversion
17636 is still fully implemented. Possible changes to ACPI 2.0
17637 specification pending.
17639 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
17642 Fix for compiler warnings for 64-bit compiles.
17646 /proc output aligned for easier parsing.
17648 Release-version compile problem fixed.
17650 New kernel configuration options documented in Configure.help.
17652 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
17657 Power resource driver integrated with bus manager.
17659 Fixed kernel fault during active cooling for thermal zones.
17663 The source code tree has been restructured.
17667 ------------------------------------------
17668 Summary of changes for this label: 03_02_01
17670 Linux OS Services Layer (OSL):
17672 Major revision of all Linux-specific code.
17674 Modularized all ACPI-specific drivers.
17676 Added new thermal zone and power resource drivers.
17678 Revamped /proc interface (new functionality is under /proc/acpi).
17680 New kernel configuration options.
17682 Linux known issues:
17684 New kernel configuration options not documented in Configure.help
17688 Module dependencies not currently implemented. If used, they
17689 should be loaded in this order: busmgr, power, ec, system,
17690 processor, battery, ac_adapter, button, thermal.
17692 Modules will not load if CONFIG_MODVERSION is set.
17694 IBM 600E - entering S5 may reboot instead of shutting down.
17696 IBM 600E - Sleep button may generate "Invalid <NULL> context"
17699 Some systems may fail with "execution mutex already acquired"
17702 ACPI CA Core Subsystem:
17704 Added a new OSL Interface, AcpiOsGetThreadId. This was required
17705 for the deadlock detection code. Defined to return a non-zero, 32-
17706 bit thread ID for the currently executing thread. May be a non-
17707 zero constant integer on single-thread systems.
17709 Implemented deadlock detection for internal subsystem mutexes. We
17710 may add conditional compilation for this code (debug only) later.
17712 ASL/AML Mutex object semantics are now fully supported. This
17713 includes multiple acquires/releases by owner and support for the
17715 Mutex SyncLevel parameter.
17717 A new "Force Release" mechanism automatically frees all ASL
17718 Mutexes that have been acquired but not released when a thread
17719 exits the interpreter. This forces conformance to the ACPI spec
17720 ("All mutexes must be released when an invocation exits") and
17721 prevents deadlocked ASL threads. This mechanism can be expanded
17722 (later) to monitor other resource acquisitions if OEM ASL code
17723 continues to misbehave (which it will).
17725 Several new ACPI exception codes have been added for the Mutex
17728 Recursive method calls are now allowed and supported (the ACPI
17729 spec does in fact allow recursive method calls.) The number of
17730 recursive calls is subject to the restrictions imposed by the
17731 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
17734 Implemented support for the SyncLevel parameter for control
17735 methods (ACPI 2.0 feature)
17737 Fixed a deadlock problem when multiple threads attempted to use
17740 Fixed a problem where the string length of a String package
17741 element was not always set in a package returned from
17742 AcpiEvaluateObject.
17744 Fixed a problem where the length of a String package element was
17745 not always included in the length of the overall package returned
17746 from AcpiEvaluateObject.
17748 Added external interfaces (Acpi*) to the ACPI debug memory
17749 manager. This manager keeps a list of all outstanding
17750 allocations, and can therefore detect memory leaks and attempts to
17751 free memory blocks more than once. Useful for code such as the
17752 power manager, etc. May not be appropriate for device drivers.
17753 Performance with the debug code enabled is slow.
17755 The ACPI Global Lock is now an optional hardware element.
17757 ASL Compiler Version X2015:
17759 Integrated changes to allow the compiler to be generated on
17760 multiple platforms.
17762 Linux makefile added to generate the compiler on Linux
17766 All platform-specific headers have been moved to their own
17767 subdirectory, Include/Platform.
17769 New source file added, Interpreter/ammutex.c
17771 New header file, Include/acstruct.h
17775 The programmer reference has been updated for the following new
17776 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
17778 ------------------------------------------
17779 Summary of changes for this label: 02_08_01
17781 Core ACPI CA Subsystem: Fixed a problem where an error was
17782 incorrectly returned if the return resource buffer was larger than
17783 the actual data (in the resource interfaces).
17785 References to named objects within packages are resolved to the
17787 full pathname string before packages are returned directly (via
17788 the AcpiEvaluateObject interface) or indirectly via the resource
17791 Linux OS Services Layer (OSL):
17793 Improved /proc battery interface.
17796 Added C-state debugging output and other miscellaneous fixes.
17798 ASL Compiler Version X2014:
17800 All defined method arguments can now be used as local variables,
17801 including the ones that are not actually passed in as parameters.
17802 The compiler tracks initialization of the arguments and issues an
17803 exception if they are used without prior assignment (just like
17806 The -o option now specifies a filename prefix that is used for all
17807 output files, including the AML output file. Otherwise, the
17808 default behavior is as follows: 1) the AML goes to the file
17809 specified in the DSDT. 2) all other output files use the input
17810 source filename as the base.
17812 ------------------------------------------
17813 Summary of changes for this label: 01_25_01
17815 Core ACPI CA Subsystem: Restructured the implementation of object
17816 store support within the interpreter. This includes support for
17817 the Store operator as well as any ASL operators that include a
17820 Partially implemented support for Implicit Result-to-Target
17821 conversion. This is when a result object is converted on the fly
17822 to the type of an existing target object. Completion of this
17823 support is pending further analysis of the ACPI specification
17824 concerning this matter.
17826 CPU-specific code has been removed from the subsystem (hardware
17829 New Power Management Timer functions added
17831 Linux OS Services Layer (OSL): Moved system state transition code
17832 to the core, fixed it, and modified Linux OSL accordingly.
17834 Fixed C2 and C3 latency calculations.
17837 We no longer use the compilation date for the version message on
17838 initialization, but retrieve the version from AcpiGetSystemInfo().
17840 Incorporated for fix Sony VAIO machines.
17842 Documentation: The Programmer Reference has been updated and
17846 ASL Compiler: Version X2013: Fixed a problem where the line
17847 numbering and error reporting could get out of sync in the
17848 presence of multiple include files.
17850 ------------------------------------------
17851 Summary of changes for this label: 01_15_01
17853 Core ACPI CA Subsystem:
17855 Implemented support for type conversions in the execution of the
17856 ASL Concatenate operator (The second operand is converted to
17857 match the type of the first operand before concatenation.)
17859 Support for implicit source operand conversion is partially
17860 implemented. The ASL source operand types Integer, Buffer, and
17861 String are freely interchangeable for most ASL operators and are
17862 converted by the interpreter on the fly as required. Implicit
17863 Target operand conversion (where the result is converted to the
17864 target type before storing) is not yet implemented.
17866 Support for 32-bit and 64-bit BCD integers is implemented.
17868 Problem fixed where a field read on an aligned field could cause a
17869 read past the end of the field.
17871 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
17872 does not return a value, but the caller expects one. (The ASL
17873 compiler flags this as a warning.)
17878 1. Static typechecking of all operands is implemented. This
17879 prevents the use of invalid objects (such as using a Package where
17880 an Integer is required) at compile time instead of at interpreter
17882 2. The ASL source line is printed with ALL errors and warnings.
17883 3. Bug fix for source EOF without final linefeed.
17884 4. Debug option is split into a parse trace and a namespace trace.
17885 5. Namespace output option (-n) includes initial values for
17886 integers and strings.
17887 6. Parse-only option added for quick syntax checking.
17888 7. Compiler checks for duplicate ACPI name declarations
17891 1. Relaxed typechecking to allow interchangeability between
17892 strings, integers, and buffers. These types are now converted by
17893 the interpreter at runtime.
17894 2. Compiler reports time taken by each internal subsystem in the
17898 ------------------------------------------
17899 Summary of changes for this label: 12_14_00
17903 This is the first official release of the compiler. Since the
17904 compiler requires elements of the Core Subsystem, this label
17905 synchronizes everything.
17907 ------------------------------------------
17908 Summary of changes for this label: 12_08_00
17911 Fixed a problem where named references within the ASL definition
17912 of both OperationRegions and CreateXXXFields did not work
17913 properly. The symptom was an AE_AML_OPERAND_TYPE during
17914 initialization of the region/field. This is similar (but not
17915 related internally) to the problem that was fixed in the last
17918 Implemented both 32-bit and 64-bit support for the BCD ASL
17919 functions ToBCD and FromBCD.
17921 Updated all legal headers to include "2000" in the copyright
17924 ------------------------------------------
17925 Summary of changes for this label: 12_01_00
17927 Fixed a problem where method invocations within the ASL definition
17928 of both OperationRegions and CreateXXXFields did not work
17929 properly. The symptom was an AE_AML_OPERAND_TYPE during
17930 initialization of the region/field:
17932 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
17933 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
17936 Fixed a problem where operators with more than one nested
17937 subexpression would fail. The symptoms were varied, by mostly
17938 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
17939 problem that has gone unnoticed until now.
17941 Subtract (Add (1,2), Multiply (3,4))
17943 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
17944 previous build (The prefix part of a relative path was handled
17947 Fixed a problem where Operation Region initialization failed if
17948 the operation region name was a "namepath" instead of a simple
17949 "nameseg". Symptom was an AE_NO_OPERAND error.
17951 Fixed a problem where an assignment to a local variable via the
17952 indirect RefOf mechanism only worked for the first such
17953 assignment. Subsequent assignments were ignored.
17955 ------------------------------------------
17956 Summary of changes for this label: 11_15_00
17958 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
17959 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
17960 the AML interpreter does NOT have support for the new 2.0 ASL
17961 grammar terms at this time.
17963 All ACPI hardware access is via the GAS structures in the ACPI 2.0
17966 All physical memory addresses across all platforms are now 64 bits
17967 wide. Logical address width remains dependent on the platform
17970 AcpiOsMapMemory interface changed to a 64-bit physical address.
17972 The AML interpreter integer size is now 64 bits, as per the ACPI
17975 For backwards compatibility with ACPI 1.0, ACPI tables with a
17976 revision number less than 2 use 32-bit integers only.
17978 Fixed a problem where the evaluation of OpRegion operands did not
17979 always resolve them to numbers properly.
17981 ------------------------------------------
17982 Summary of changes for this label: 10_20_00
17984 Fix for CBN_._STA issue. This fix will allow correct access to
17985 CBN_ OpRegions when the _STA returns 0x8.
17987 Support to convert ACPI constants (Ones, Zeros, One) to actual
17988 values before a package object is returned
17990 Fix for method call as predicate to if/while construct causing
17991 incorrect if/while behavior
17993 Fix for Else block package lengths sometimes calculated wrong (if
17996 Fix for Processor object length field, was always zero
17998 Table load abort if FACP sanity check fails
18000 Fix for problem with Scope(name) if name already exists
18002 Warning emitted if a named object referenced cannot be found
18003 (resolved) during method execution.
18009 ------------------------------------------
18010 Summary of changes for this label: 9_29_00
18012 New table initialization interfaces: AcpiInitializeSubsystem no
18013 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
18014 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
18015 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
18018 Note: These interface changes require changes to all existing OSDs
18020 The PCI_Config default address space handler is always installed
18021 at the root namespace object.
18023 -------------------------------------------
18024 Summary of changes for this label: 09_15_00
18026 The new initialization architecture is implemented. New
18027 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
18028 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
18030 (Namespace is automatically loaded when a table is loaded)
18032 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
18033 52 bytes to 32 bytes. There is usually one of these for every
18034 namespace object, so the memory savings is significant.
18036 Implemented just-in-time evaluation of the CreateField operators.
18038 Bug fixes for IA-64 support have been integrated.
18040 Additional code review comments have been implemented
18042 The so-called "third pass parse" has been replaced by a final walk
18043 through the namespace to initialize all operation regions (address
18044 spaces) and fields that have not yet been initialized during the
18045 execution of the various _INI and REG methods.
18047 New file - namespace/nsinit.c
18049 -------------------------------------------
18050 Summary of changes for this label: 09_01_00
18052 Namespace manager data structures have been reworked to change the
18053 primary object from a table to a single object. This has
18054 resulted in dynamic memory savings of 3X within the namespace and
18055 2X overall in the ACPI CA subsystem.
18057 Fixed problem where the call to AcpiEvFindPciRootBuses was
18058 inadvertently left commented out.
18060 Reduced the warning count when generating the source with the GCC
18063 Revision numbers added to each module header showing the
18064 SourceSafe version of the file. Please refer to this version
18065 number when giving us feedback or comments on individual modules.
18067 The main object types within the subsystem have been renamed to
18068 clarify their purpose:
18070 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
18071 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
18072 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
18074 NOTE: no changes to the initialization sequence are included in
18077 -------------------------------------------
18078 Summary of changes for this label: 08_23_00
18080 Fixed problem where TerminateControlMethod was being called
18081 multiple times per method
18083 Fixed debugger problem where single stepping caused a semaphore to
18086 Improved performance through additional parse object caching -
18087 added ACPI_EXTENDED_OP type
18089 -------------------------------------------
18090 Summary of changes for this label: 08_10_00
18092 Parser/Interpreter integration: Eliminated the creation of
18093 complete parse trees for ACPI tables and control methods.
18094 Instead, parse subtrees are created and then deleted as soon as
18095 they are processed (Either entered into the namespace or executed
18096 by the interpreter). This reduces the use of dynamic kernel
18097 memory significantly. (about 10X)
18099 Exception codes broken into classes and renumbered. Be sure to
18100 recompile all code that includes acexcep.h. Hopefully we won't
18101 have to renumber the codes again now that they are split into
18102 classes (environment, programmer, AML code, ACPI table, and
18105 Fixed some additional alignment issues in the Resource Manager
18108 Implemented semaphore tracking in the AcpiExec utility, and fixed
18109 several places where mutexes/semaphores were being unlocked
18110 without a corresponding lock operation. There are no known
18111 semaphore or mutex "leaks" at this time.
18113 Fixed the case where an ASL Return operator is used to return an
18116 -------------------------------------------
18117 Summary of changes for this label: 07_28_00
18119 Fixed a problem with the way addresses were calculated in
18120 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
18121 manifested itself when a Field was created with WordAccess or
18122 DwordAccess, but the field unit defined within the Field was less
18124 than a Word or Dword.
18126 Fixed a problem in AmlDumpOperands() module's loop to pull
18127 operands off of the operand stack to display information. The
18128 problem manifested itself as a TLB error on 64-bit systems when
18129 accessing an operand stack with two or more operands.
18131 Fixed a problem with the PCI configuration space handlers where
18132 context was getting confused between accesses. This required a
18133 change to the generic address space handler and address space
18134 setup definitions. Handlers now get both a global handler context
18135 (this is the one passed in by the user when executing
18136 AcpiInstallAddressSpaceHandler() and a specific region context
18137 that is unique to each region (For example, the _ADR, _SEG and
18138 _BBN values associated with a specific region). The generic
18139 function definitions have changed to the following:
18141 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
18142 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
18143 *HandlerContext, // This used to be void *Context void
18144 *RegionContext); // This is an additional parameter
18146 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
18147 RegionHandle, UINT32 Function, void *HandlerContext, void
18148 **RegionContext); // This used to be **ReturnContext
18150 -------------------------------------------
18151 Summary of changes for this label: 07_21_00
18153 Major file consolidation and rename. All files within the
18154 interpreter have been renamed as well as most header files. This
18155 was done to prevent collisions with existing files in the host
18156 OSs -- filenames such as "config.h" and "global.h" seem to be
18157 quite common. The VC project files have been updated. All
18158 makefiles will require modification.
18160 The parser/interpreter integration continues in Phase 5 with the
18161 implementation of a complete 2-pass parse (the AML is parsed
18162 twice) for each table; This avoids the construction of a huge
18163 parse tree and therefore reduces the amount of dynamic memory
18164 required by the subsystem. Greater use of the parse object cache
18165 means that performance is unaffected.
18167 Many comments from the two code reviews have been rolled in.
18169 The 64-bit alignment support is complete.
18171 -------------------------------------------
18172 Summary of changes for this label: 06_30_00
18174 With a nod and a tip of the hat to the technology of yesteryear,
18175 we've added support in the source code for 80 column output
18176 devices. The code is now mostly constrained to 80 columns or
18177 less to support environments and editors that 1) cannot display
18178 or print more than 80 characters on a single line, and 2) cannot
18179 disable line wrapping.
18181 A major restructuring of the namespace data structure has been
18182 completed. The result is 1) cleaner and more
18183 understandable/maintainable code, and 2) a significant reduction
18184 in the dynamic memory requirement for each named ACPI object
18187 -------------------------------------------
18188 Summary of changes for this label: 06_23_00
18190 Linux support has been added. In order to obtain approval to get
18191 the ACPI CA subsystem into the Linux kernel, we've had to make
18192 quite a few changes to the base subsystem that will affect all
18193 users (all the changes are generic and OS- independent). The
18194 effects of these global changes have been somewhat far reaching.
18195 Files have been merged and/or renamed and interfaces have been
18196 renamed. The major changes are described below.
18198 Osd* interfaces renamed to AcpiOs* to eliminate namespace
18199 pollution/confusion within our target kernels. All OSD
18200 interfaces must be modified to match the new naming convention.
18202 Files merged across the subsystem. A number of the smaller source
18203 and header files have been merged to reduce the file count and
18204 increase the density of the existing files. There are too many
18205 to list here. In general, makefiles that call out individual
18206 files will require rebuilding.
18208 Interpreter files renamed. All interpreter files now have the
18209 prefix am* instead of ie* and is*.
18211 Header files renamed: The acapi.h file is now acpixf.h. The
18212 acpiosd.h file is now acpiosxf.h. We are removing references to
18213 the acronym "API" since it is somewhat windowsy. The new name is
18214 "external interface" or xface or xf in the filenames.j
18217 All manifest constants have been forced to upper case (some were
18218 mixed case.) Also, the string "ACPI_" has been prepended to many
18219 (not all) of the constants, typedefs, and structs.
18221 The globals "DebugLevel" and "DebugLayer" have been renamed
18222 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
18224 All other globals within the subsystem are now prefixed with
18225 "AcpiGbl_" Internal procedures within the subsystem are now
18226 prefixed with "Acpi" (with only a few exceptions). The original
18227 two-letter abbreviation for the subcomponent remains after "Acpi"
18228 - for example, CmCallocate became AcpiCmCallocate.
18230 Added a source code translation/conversion utility. Used to
18231 generate the Linux source code, it can be modified to generate
18232 other types of source as well. Can also be used to cleanup
18233 existing source by removing extraneous spaces and blank lines.
18234 Found in tools/acpisrc/*
18236 OsdUnMapMemory was renamed to OsdUnmapMemory and then
18237 AcpiOsUnmapMemory. (UnMap became Unmap).
18239 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
18240 When set to one, this indicates that the caller wants to use the
18242 semaphore as a mutex, not a counting semaphore. ACPI CA uses
18243 both types. However, implementers of this call may want to use
18244 different OS primitives depending on the type of semaphore
18245 requested. For example, some operating systems provide separate
18247 "mutex" and "semaphore" interfaces - where the mutex interface is
18248 much faster because it doesn't have all the overhead of a full
18249 semaphore implementation.
18251 Fixed a deadlock problem where a method that accesses the PCI
18252 address space can block forever if it is the first access to the
18255 -------------------------------------------
18256 Summary of changes for this label: 06_02_00
18258 Support for environments that cannot handle unaligned data
18259 accesses (e.g. firmware and OS environments devoid of alignment
18260 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
18261 been added (via configurable macros) in these three areas: -
18262 Transfer of data from the raw AML byte stream is done via byte
18263 moves instead of word/dword/qword moves. - External objects are
18264 aligned within the user buffer, including package elements (sub-
18265 objects). - Conversion of name strings to UINT32 Acpi Names is now
18268 The Store operator was modified to mimic Microsoft's
18269 implementation when storing to a Buffer Field.
18271 Added a check of the BM_STS bit before entering C3.
18273 The methods subdirectory has been obsoleted and removed. A new
18274 file, cmeval.c subsumes the functionality.
18276 A 16-bit (DOS) version of AcpiExec has been developed. The
18277 makefile is under the acpiexec directory.