1 ----------------------------------------
2 23 June 2011. Summary of changes for version 20110623:
4 1) ACPI CA Core Subsystem:
6 Updated the predefined name repair mechanism to not attempt repair of a _TSS
7 return object if a _PSS object is present. We can only sort the _TSS return
8 package if there is no _PSS within the same scope. This is because if _PSS is
9 present, the ACPI specification dictates that the _TSS Power Dissipation field
10 is to be ignored, and therefore some BIOSs leave garbage values in the _TSS
11 Power field(s). In this case, it is best to just return the _TSS package as-
12 is. Reported by, and fixed with assistance from Fenghua Yu.
14 Added an option to globally disable the control method return value validation
15 and repair. This runtime option can be used to disable return value repair if
16 this is causing a problem on a particular machine. Also added an option to
17 AcpiExec (-dr) to set this disable flag.
19 All makefiles and project files: Major changes to improve generation of ACPICA
21 Reduce default optimization levels to improve compatibility
22 For Linux, add strict-aliasing=0 for gcc 4
23 Cleanup and simplify use of command line defines
24 Cleanup multithread library support
25 Improve usage messages
27 Linux-specific header: update handling of THREAD_ID and pthread. For the 32-
28 bit case, improve casting to eliminate possible warnings, especially with the
31 Example Code and Data Size: These are the sizes for the OS-independent
32 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
33 version of the code includes the debug output trace mechanism and has a much
34 larger code and data size.
36 Previous Release (VC 9.0):
37 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
38 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
39 Current Release (VC 9.0):
40 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
41 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
43 2) iASL Compiler/Disassembler and Tools:
45 With this release, a new utility named "acpihelp" has been added to the ACPICA
46 package. This utility summarizes the ACPI specification chapters for the ASL
47 and AML languages. It generates under Linux/Unix as well as Windows, and
48 provides the following functionality:
49 Find/display ASL operator(s) -- with description and syntax.
50 Find/display ASL keyword(s) -- with exact spelling and descriptions.
51 Find/display ACPI predefined name(s) -- with description, number
52 of arguments, and the return value data type.
53 Find/display AML opcode name(s) -- with opcode, arguments, and grammar.
54 Decode/display AML opcode -- with opcode name, arguments, and grammar.
56 Service Layers: Make multi-thread support configurable. Conditionally compile
57 the multi-thread support so that threading libraries will not be linked if not
58 necessary. The only tool that requires multi-thread support is AcpiExec.
60 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions of
61 Bison appear to want the interface to yyerror to be a const char * (or at
62 least this is a problem when generating iASL on some systems.) ACPICA BZ 923
65 Tools: Fix for systems where O_BINARY is not defined. Only used for Windows
66 versions of the tools.
68 ----------------------------------------
69 27 May 2011. Summary of changes for version 20110527:
71 1) ACPI CA Core Subsystem:
73 ASL Load() operator: Reinstate most restrictions on the incoming ACPI table
74 signature. Now, only allow SSDT, OEMx, and a null signature. History:
75 1) Originally, we checked the table signature for "SSDT" or "PSDT".
76 (PSDT is now obsolete.)
77 2) We added support for OEMx tables, signature "OEM" plus a fourth
78 "don't care" character.
79 3) Valid tables were encountered with a null signature, so we just
80 gave up on validating the signature, (05/2008).
81 4) We encountered non-AML tables such as the MADT, which caused
82 interpreter errors and kernel faults. So now, we once again allow
83 only SSDT, OEMx, and now, also a null signature. (05/2011).
85 Added the missing _TDL predefined name to the global name list in order to
86 enable validation. Affects both the core ACPICA code and the iASL compiler.
88 Example Code and Data Size: These are the sizes for the OS-independent
89 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
90 version of the code includes the debug output trace mechanism and has a much
91 larger code and data size.
93 Previous Release (VC 9.0):
94 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
95 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
96 Current Release (VC 9.0):
97 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
98 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
100 2) iASL Compiler/Disassembler and Tools:
102 Debugger/AcpiExec: Implemented support for "complex" method arguments on the
103 debugger command line. This adds support beyond simple integers -- including
104 Strings, Buffers, and Packages. Includes support for nested packages.
105 Increased the default command line buffer size to accommodate these arguments.
106 See the ACPICA reference for details and syntax. ACPICA BZ 917.
108 Debugger/AcpiExec: Implemented support for "default" method arguments for the
109 Execute/Debug command. Now, the debugger will always invoke a control method
110 with the required number of arguments -- even if the command line specifies
111 none or insufficient arguments. It uses default integer values for any missing
112 arguments. Also fixes a bug where only six method arguments maximum were
113 supported instead of the required seven.
115 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine and
116 also return status in order to prevent buffer overruns. See the ACPICA
117 reference for details and syntax. ACPICA BZ 921
119 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
120 makefiles to simplify support for the two different but similar parser
121 generators, bison and yacc.
123 Updated the generic unix makefile for gcc 4. The default gcc version is now
124 expected to be 4 or greater, since options specific to gcc 4 are used.
126 ----------------------------------------
127 13 April 2011. Summary of changes for version 20110413:
129 1) ACPI CA Core Subsystem:
131 Implemented support to execute a so-called "orphan" _REG method under the EC
132 device. This change will force the execution of a _REG method underneath the
134 device even if there is no corresponding operation region of type
135 EmbeddedControl. Fixes a problem seen on some machines and apparently is
136 compatible with Windows behavior. ACPICA BZ 875.
138 Added more predefined methods that are eligible for automatic NULL package
139 element removal. This change adds another group of predefined names to the
141 of names that can be repaired by having NULL package elements dynamically
142 removed. This group are those methods that return a single variable-length
143 package containing simple data types such as integers, buffers, strings. This
144 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx, _PSL,
146 and _TZD. ACPICA BZ 914.
148 Split and segregated all internal global lock functions to a new file,
151 Updated internal address SpaceID for DataTable regions. Moved this internal
153 id in preparation for ACPI 5.0 changes that will include some new space IDs.
155 change should not affect user/host code.
157 Example Code and Data Size: These are the sizes for the OS-independent
159 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug version of
160 the code includes the debug output trace mechanism and has a much larger code
164 Previous Release (VC 9.0):
165 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
166 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
167 Current Release (VC 9.0):
168 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
169 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
171 2) iASL Compiler/Disassembler and Tools:
173 iASL/DTC: Major update for new grammar features. Allow generic data types in
174 custom ACPI tables. Field names are now optional. Any line can be split to
175 multiple lines using the continuation char (\). Large buffers now use line-
176 continuation character(s) and no colon on the continuation lines. See the
178 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob Moore.
180 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return statements.
181 Since the parser stuffs a "zero" as the return value for these statements (due
183 the underlying AML grammar), they were seen as "return with value" by the iASL
184 semantic checking. They are now seen correctly as "null" return statements.
186 iASL: Check if a_REG declaration has a corresponding Operation Region. Adds a
187 check for each _REG to ensure that there is in fact a corresponding operation
188 region declaration in the same scope. If not, the _REG method is not very
190 since it probably won't be executed. ACPICA BZ 915.
192 iASL/DTC: Finish support for expression evaluation. Added a new expression
194 that implements c-style operator precedence and parenthesization. ACPICA
198 Disassembler/DTC: Remove support for () and <> style comments in data tables.
200 that DTC has full expression support, we don't want to have comment strings
202 start with a parentheses or a less-than symbol. Now, only the standard /* and
204 comments are supported, as well as the bracket [] comments.
206 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
208 headers in the acpidump file. Update the header validation to support these
209 tables. Problem introduced in previous AcpiXtract version in the change to
210 support "wrong checksum" error messages emitted by acpidump utility.
212 iASL: Add a * option to generate all template files (as a synonym for ALL) as
214 "iasl -T *" or "iasl -T ALL".
216 iASL/DTC: Do not abort compiler on fatal errors. We do not want to completely
217 abort the compiler on "fatal" errors, simply should abort the current compile.
218 This allows multiple compiles with a single (possibly wildcard) compiler
221 ----------------------------------------
222 16 March 2011. Summary of changes for version 20110316:
224 1) ACPI CA Core Subsystem:
226 Fixed a problem caused by a _PRW method appearing at the namespace root scope
227 during the setup of wake GPEs. A fault could occur if a _PRW directly under
229 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
231 Implemented support for "spurious" Global Lock interrupts. On some systems, a
232 global lock interrupt can occur without the pending flag being set. Upon a GL
233 interrupt, we now ensure that a thread is actually waiting for the lock before
234 signaling GL availability. Rafael Wysocki, Bob Moore.
236 Example Code and Data Size: These are the sizes for the OS-independent
238 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug version of
239 the code includes the debug output trace mechanism and has a much larger code
243 Previous Release (VC 9.0):
244 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
245 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
246 Current Release (VC 9.0):
247 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
248 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
250 2) iASL Compiler/Disassembler and Tools:
252 Implemented full support for the "SLIC" ACPI table. Includes support in the
253 header files, disassembler, table compiler, and template generator. Bob Moore,
256 AcpiXtract: Correctly handle embedded comments and messages from AcpiDump.
257 Apparently some or all versions of acpidump will occasionally emit a comment
259 "Wrong checksum", etc., into the dump file. This was causing problems for
260 AcpiXtract. ACPICA BZ 905.
262 iASL: Fix the Linux makefile by removing an inadvertent double file inclusion.
265 AcpiExec: Update installation of operation region handlers. Install one
267 for a user-defined address space. This is used by the ASL test suite (ASLTS).
269 ----------------------------------------
270 11 February 2011. Summary of changes for version 20110211:
272 1) ACPI CA Core Subsystem:
274 Added a mechanism to defer _REG methods for some early-installed handlers.
275 Most user handlers should be installed before call to AcpiEnableSubsystem.
276 However, Event handlers and region handlers should be installed after
277 AcpiInitializeObjects. Override handlers for the "default" regions should be
278 installed early, however. This change executes all _REG methods for the
279 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
280 chicken/egg issues between them. ACPICA BZ 848.
282 Implemented an optimization for GPE detection. This optimization will simply
283 ignore GPE registers that contain no enabled GPEs -- there is no need to
284 read the register since this information is available internally. This
285 becomes more important on machines with a large GPE space. ACPICA bugzilla
286 884. Lin Ming. Suggestion from Joe Liu.
288 Removed all use of the highly unreliable FADT revision field. The revision
289 number in the FADT has been found to be completely unreliable and cannot be
290 trusted. Only the actual table length can be used to infer the version. This
291 change updates the ACPICA core and the disassembler so that both no longer
292 even look at the FADT version and instead depend solely upon the FADT
295 Fix an unresolved name issue for the no-debug and no-error-message source
296 generation cases. The _AcpiModuleName was left undefined in these cases, but
297 it is actually needed as a parameter to some interfaces. Define
298 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
300 Split several large files (makefiles and project files updated)
301 utglobal.c -> utdecode.c
302 dbcomds.c -> dbmethod.c dbnames.c
303 dsopcode.c -> dsargs.c dscontrol.c
304 dsload.c -> dsload2.c
305 aslanalyze.c -> aslbtypes.c aslwalks.c
307 Example Code and Data Size: These are the sizes for the OS-independent
308 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
309 debug version of the code includes the debug output trace mechanism and has
310 a much larger code and data size.
312 Previous Release (VC 9.0):
313 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
314 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
315 Current Release (VC 9.0):
316 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
317 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
319 2) iASL Compiler/Disassembler and Tools:
321 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
322 These are useful C-style macros with the standard definitions. ACPICA
325 iASL/DTC: Added support for integer expressions and labels. Support for full
326 expressions for all integer fields in all ACPI tables. Support for labels in
327 "generic" portions of tables such as UEFI. See the iASL reference manual.
329 Debugger: Added a command to display the status of global handlers. The
330 "handlers" command will display op region, fixed event, and miscellaneous
331 global handlers. installation status -- and for op regions, whether default
332 or user-installed handler will be used.
334 iASL: Warn if reserved method incorrectly returns a value. Many predefined
335 names are defined such that they do not return a value. If implemented as a
336 method, issue a warning if such a name explicitly returns a value. ACPICA
339 iASL: Added detection of GPE method name conflicts. Detects a conflict where
340 there are two GPE methods of the form _Lxy and _Exy in the same scope. (For
341 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
343 iASL/DTC: Fixed a couple input scanner issues with comments and line
344 numbers. Comment remover could get confused and miss a comment ending. Fixed
345 a problem with line counter maintenance.
347 iASL/DTC: Reduced the severity of some errors from fatal to error. There is
348 no need to abort on simple errors within a field definition.
350 Debugger: Simplified the output of the help command. All help output now in
351 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
353 ----------------------------------------
354 12 January 2011. Summary of changes for version 20110112:
356 1) ACPI CA Core Subsystem:
358 Fixed a race condition between method execution and namespace walks that can
359 possibly cause a fault. The problem was apparently introduced in version
360 20100528 as a result of a performance optimization that reduces the number of
361 namespace walks upon method exit by using the delete_namespace_subtree
362 function instead of the delete_namespace_by_owner function used previously.
363 Bug is a missing namespace lock in the delete_namespace_subtree function.
364 dana.myers@oracle.com
366 Fixed several issues and a possible fault with the automatic "serialized"
367 method support. History: This support changes a method to "serialized" on the
368 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
369 possibility that it cannot handle reentrancy. This fix repairs a couple of
370 issues seen in the field, especially on machines with many cores:
372 1) Delete method children only upon the exit of the last thread,
373 so as to not delete objects out from under other running threads
374 (and possibly causing a fault.)
375 2) Set the "serialized" bit for the method only upon the exit of the
376 Last thread, so as to not cause deadlock when running threads
378 3) Cleanup the use of the AML "MethodFlags" and internal method flags
379 so that there is no longer any confusion between the two.
381 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
383 Debugger: Now lock the namespace for duration of a namespace dump. Prevents
384 issues if the namespace is changing dynamically underneath the debugger.
385 Especially affects temporary namespace nodes, since the debugger displays
388 Updated the ordering of include files. The ACPICA headers should appear
389 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can set
390 any necessary compiler-specific defines, etc. Affects the ACPI-related tools
393 Updated all ACPICA copyrights and signons to 2011. Added the 2011 copyright
394 to all module headers and signons, including the Linux header. This affects
395 virtually every file in the ACPICA core subsystem, iASL compiler, and all
398 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
399 project files for VC++ 6.0 are now obsolete. New project files can be found
400 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
403 Example Code and Data Size: These are the sizes for the OS-independent
404 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
405 debug version of the code includes the debug output trace mechanism and has a
406 much larger code and data size.
408 Previous Release (VC 6.0):
409 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
410 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
411 Current Release (VC 9.0):
412 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
413 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
415 2) iASL Compiler/Disassembler and Tools:
417 iASL: Added generic data types to the Data Table compiler. Add "generic" data
418 types such as UINT32, String, Unicode, etc., to simplify the generation of
419 platform-defined tables such as UEFI. Lin Ming.
421 iASL: Added listing support for the Data Table Compiler. Adds listing support
422 (-l) to display actual binary output for each line of input code.
424 ----------------------------------------
425 09 December 2010. Summary of changes for version 20101209:
427 1) ACPI CA Core Subsystem:
429 Completed the major overhaul of the GPE support code that was begun in July
430 2010. Major features include: removal of _PRW execution in ACPICA (host
431 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
432 changes to existing interfaces, simplification of GPE handler operation, and
433 a handful of new interfaces:
439 One new file, evxfgpe.c to consolidate all external GPE interfaces.
441 See the ACPICA Programmer Reference for full details and programming
442 information. See the new section 4.4 "General Purpose Event (GPE) Support"
443 for a full overview, and section 8.7 "ACPI General Purpose Event Management"
444 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin Ming,
445 Bob Moore, Rafael Wysocki.
447 Implemented a new GPE feature for Windows compatibility, the "Implicit Wake
448 GPE Notify". This feature will automatically issue a Notify(2) on a device
449 when a Wake GPE is received if there is no corresponding GPE method or
450 handler. ACPICA BZ 870.
452 Fixed a problem with the Scope() operator during table parse and load phase.
453 During load phase (table load or method execution), the scope operator should
454 not enter the target into the namespace. Instead, it should open a new scope
455 at the target location. Linux BZ 19462, ACPICA BZ 882.
457 Example Code and Data Size: These are the sizes for the OS-independent
458 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
459 debug version of the code includes the debug output trace mechanism and has a
460 much larger code and data size.
463 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
464 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
466 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
467 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
469 2) iASL Compiler/Disassembler and Tools:
471 iASL: Relax the alphanumeric restriction on _CID strings. These strings are
472 "bus-specific" per the ACPI specification, and therefore any characters are
473 acceptable. The only checks that can be performed are for a null string and
474 perhaps for a leading asterisk. ACPICA BZ 886.
476 iASL: Fixed a problem where a syntax error that caused a premature EOF
477 condition on the source file emitted a very confusing error message. The
478 premature EOF is now detected correctly. ACPICA BZ 891.
480 Disassembler: Decode the AccessSize within a Generic Address Structure (byte
481 access, word access, etc.) Note, this field does not allow arbitrary bit
482 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
484 New: AcpiNames utility - Example namespace dump utility. Shows an example of
485 ACPICA configuration for a minimal namespace dump utility. Uses table and
486 namespace managers, but no AML interpreter. Does not add any functionality
487 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
488 partition and configure ACPICA. ACPICA BZ 883.
490 AML Debugger: Increased the debugger buffer size for method return objects.
491 Was 4K, increased to 16K. Also enhanced error messages for debugger method
492 execution, including the buffer overflow case.
494 ----------------------------------------
495 13 October 2010. Summary of changes for version 20101013:
497 1) ACPI CA Core Subsystem:
499 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events, now
500 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
501 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
503 Changed the type of the predefined namespace object _TZ from ThermalZone to
504 Device. This was found to be confusing to the host software that processes
505 the various thermal zones, since _TZ is not really a ThermalZone. However, a
506 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
509 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
510 string is "Windows 2006 SP2".
512 Eliminated duplicate code in AcpiUtExecute* functions. Now that the nsrepair
513 code automatically repairs _HID-related strings, this type of code is no
514 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ 878.
516 Example Code and Data Size: These are the sizes for the OS-independent
517 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
518 debug version of the code includes the debug output trace mechanism and has a
519 much larger code and data size.
522 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
523 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
525 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
526 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
528 2) iASL Compiler/Disassembler and Tools:
530 iASL: Implemented additional compile-time validation for _HID strings. The
531 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the length of
532 the string must be exactly seven or eight characters. For both _HID and _CID
533 strings, all characters must be alphanumeric. ACPICA BZ 874.
535 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
536 descriptors that are mostly or all zeros, with the expectation that they will
537 be filled in at runtime. iASL now allows this as long as there is a "resource
538 tag" (name) associated with the descriptor, which gives the ASL a handle
539 needed to modify the descriptor. ACPICA BZ 873.
541 Added single-thread support to the generic Unix application OSL. Primarily
542 for iASL support, this change removes the use of semaphores in the single-
543 threaded ACPICA tools/applications - increasing performance. The
544 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
545 option. ACPICA BZ 879.
547 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and support
548 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
550 iASL: Moved all compiler messages to a new file, aslmessages.h.
552 ----------------------------------------
553 15 September 2010. Summary of changes for version 20100915:
555 1) ACPI CA Core Subsystem:
557 Removed the AcpiOsDerivePciId OSL interface. The various host implementations
558 of this function were not OS-dependent and are now obsolete and can be
559 removed from all host OSLs. This function has been replaced by
560 AcpiHwDerivePciId, which is now part of the ACPICA core code.
561 AcpiHwDerivePciId has been implemented without recursion. Adds one new
562 module, hwpci.c. ACPICA BZ 857.
564 Implemented a dynamic repair for _HID and _CID strings. The following
565 problems are now repaired at runtime: 1) Remove a leading asterisk in the
566 string, and 2) the entire string is uppercased. Both repairs are in
567 accordance with the ACPI specification and will simplify host driver code.
570 The ACPI_THREAD_ID type is no longer configurable, internally it is now
571 always UINT64. This simplifies the ACPICA code, especially any printf output.
572 UINT64 is the only common data type for all thread_id types across all
573 operating systems. It is now up to the host OSL to cast the native thread_id
574 type to UINT64 before returning the value to ACPICA (via AcpiOsGetThreadId).
577 Added the ACPI_INLINE type to enhance the ACPICA configuration. The "inline"
578 keyword is not standard across compilers, and this type allows inline to be
579 configured on a per-compiler basis. Lin Ming.
581 Made the system global AcpiGbl_SystemAwakeAndRunning publically available.
582 Added an extern for this boolean in acpixf.h. Some hosts utilize this value
583 during suspend/restore operations. ACPICA BZ 869.
585 All code that implements error/warning messages with the "ACPI:" prefix has
586 been moved to a new module, utxferror.c.
588 The UINT64_OVERLAY was moved to utmath.c, which is the only module where it
589 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
591 Example Code and Data Size: These are the sizes for the OS-independent
592 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
593 debug version of the code includes the debug output trace mechanism and has a
594 much larger code and data size.
597 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
598 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
600 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
601 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
603 2) iASL Compiler/Disassembler and Tools:
605 iASL/Disassembler: Write ACPI errors to stderr instead of the output file.
606 This keeps the output files free of random error messages that may originate
607 from within the namespace/interpreter code. Used this opportunity to merge
608 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
609 866. Lin Ming, Bob Moore.
611 Tools: update some printfs for ansi warnings on size_t. Handle width change
612 of size_t on 32-bit versus 64-bit generations. Lin Ming.
614 ----------------------------------------
615 06 August 2010. Summary of changes for version 20100806:
617 1) ACPI CA Core Subsystem:
619 Designed and implemented a new host interface to the _OSI support code. This
620 will allow the host to dynamically add or remove multiple _OSI strings, as
621 well as install an optional handler that is called for each _OSI invocation.
622 Also added a new AML debugger command, 'osi' to display and modify the global
623 _OSI string table, and test support in the AcpiExec utility. See the ACPICA
624 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
626 AcpiInstallInterface - Add an _OSI string.
627 AcpiRemoveInterface - Delete an _OSI string.
628 AcpiInstallInterfaceHandler - Install optional _OSI handler.
630 AcpiOsValidateInterface - no longer used.
632 source/components/utilities/utosi.c
634 Re-introduced the support to enable multi-byte transfers for Embedded
635 Controller (EC) operation regions. A reported problem was found to be a bug
636 in the host OS, not in the multi-byte support. Previously, the maximum data
637 size passed to the EC operation region handler was a single byte. There are
638 often EC Fields larger than one byte that need to be transferred, and it is
639 useful for the EC driver to lock these as a single transaction. This change
640 enables single transfers larger than 8 bits. This effectively changes the
641 access to the EC space from ByteAcc to AnyAcc, and will probably require
642 changes to the host OS Embedded Controller driver to enable 16/32/64/256-bit
643 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
645 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
646 prototype in acpiosxf.h had the output value pointer as a (void *).
647 It should be a (UINT64 *). This may affect some host OSL code.
649 Fixed a couple problems with the recently modified Linux makefiles for iASL
650 and AcpiExec. These new makefiles place the generated object files in the
651 local directory so that there can be no collisions between the files that are
652 shared between them that are compiled with different options.
654 Example Code and Data Size: These are the sizes for the OS-independent
655 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
656 debug version of the code includes the debug output trace mechanism and has a
657 much larger code and data size.
660 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
661 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
663 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
664 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
666 2) iASL Compiler/Disassembler and Tools:
668 iASL/Disassembler: Added a new option (-da, "disassemble all") to load the
669 namespace from and disassemble an entire group of AML files. Useful for
670 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn) and
671 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
673 iASL: Allow multiple invocations of -e option. This change allows multiple
674 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ 834.
677 ----------------------------------------
678 02 July 2010. Summary of changes for version 20100702:
680 1) ACPI CA Core Subsystem:
682 Implemented several updates to the recently added GPE reference count
683 support. The model for "wake" GPEs is changing to give the host OS complete
684 control of these GPEs. Eventually, the ACPICA core will not execute any _PRW
685 methods, since the host already must execute them. Also, additional changes
686 were made to help ensure that the reference counts are kept in proper
687 synchronization with reality. Rafael J. Wysocki.
689 1) Ensure that GPEs are not enabled twice during initialization.
690 2) Ensure that GPE enable masks stay in sync with the reference count.
691 3) Do not inadvertently enable GPEs when writing GPE registers.
692 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
693 interface. This interface will set or clear individual GPEs for wakeup.
694 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These interfaces
695 are now used for "runtime" GPEs only.
697 Changed the behavior of the GPE install/remove handler interfaces. The GPE is
698 no longer disabled during this process, as it was found to cause problems on
699 some machines. Rafael J. Wysocki.
701 Reverted a change introduced in version 20100528 to enable Embedded
702 Controller multi-byte transfers. This change was found to cause problems with
703 Index Fields and possibly Bank Fields. It will be reintroduced when these
704 problems have been resolved.
706 Fixed a problem with references to Alias objects within Package Objects. A
707 reference to an Alias within the definition of a Package was not always
708 resolved properly. Aliases to objects like Processors, Thermal zones, etc.
709 were resolved to the actual object instead of a reference to the object as it
710 should be. Package objects are only allowed to contain integer, string,
711 buffer, package, and reference objects. Redhat bugzilla 608648.
713 Example Code and Data Size: These are the sizes for the OS-independent
714 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
715 debug version of the code includes the debug output trace mechanism and has a
716 much larger code and data size.
719 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
720 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
722 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
723 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
725 2) iASL Compiler/Disassembler and Tools:
727 iASL: Implemented a new compiler subsystem to allow definition and
728 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc. These
729 are called "ACPI Data Tables", and the new compiler is the "Data Table
730 Compiler". This compiler is intended to simplify the existing error-prone
731 process of creating these tables for the BIOS, as well as allowing the
732 disassembly, modification, recompilation, and override of existing ACPI data
733 tables. See the iASL User Guide for detailed information.
735 iASL: Implemented a new Template Generator option in support of the new Data
736 Table Compiler. This option will create examples of all known ACPI tables
737 that can be used as the basis for table development. See the iASL
738 documentation and the -T option.
740 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
743 Updated the Linux makefiles for iASL and AcpiExec to place the generated
744 object files in the local directory so that there can be no collisions
745 between the shared files between them that are generated with different
748 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec. Use
749 the #define __APPLE__ to enable this support.
751 ----------------------------------------
752 28 May 2010. Summary of changes for version 20100528:
754 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
755 available at www.acpi.info. This is primarily an errata release.
757 1) ACPI CA Core Subsystem:
759 Undefined ACPI tables: We are looking for the definitions for the following
760 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
762 Implemented support to enable multi-byte transfers for Embedded Controller
763 (EC) operation regions. Previously, the maximum data size passed to the EC
764 operation region handler was a single byte. There are often EC Fields larger
765 than one byte that need to be transferred, and it is useful for the EC driver
766 to lock these as a single transaction. This change enables single transfers
767 larger than 8 bits. This effectively changes the access to the EC space from
768 ByteAcc to AnyAcc, and will probably require changes to the host OS Embedded
769 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-bit
770 transfers. Alexey Starikovskiy, Lin Ming
772 Implemented a performance enhancement for namespace search and access. This
773 change enhances the performance of namespace searches and walks by adding a
774 backpointer to the parent in each namespace node. On large namespaces, this
775 change can improve overall ACPI performance by up to 9X. Adding a pointer to
776 each namespace node increases the overall size of the internal namespace by
777 about 5%, since each namespace entry usually consists of both a namespace
778 node and an ACPI operand object. However, this is the first growth of the
779 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
781 Implemented a performance optimization that reduces the number of namespace
782 walks. On control method exit, only walk the namespace if the method is known
783 to have created namespace objects outside of its local scope. Previously, the
784 entire namespace was traversed on each control method exit. This change can
785 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob Moore.
787 Added support to truncate I/O addresses to 16 bits for Windows compatibility.
788 Some ASL code has been seen in the field that inadvertently has bits set
789 above bit 15. This feature is optional and is enabled if the BIOS requests
790 any Windows OSI strings. It can also be enabled by the host OS. Matthew
793 Added support to limit the maximum time for the ASL Sleep() operator. To
794 prevent accidental deep sleeps, limit the maximum time that Sleep() will
795 actually sleep. Configurable, the default maximum is two seconds. ACPICA
798 Added run-time validation support for the _WDG and_WED Microsoft predefined
799 methods. These objects are defined by "Windows Instrumentation", and are not
800 part of the ACPI spec. ACPICA BZ 860.
802 Expanded all statistic counters used during namespace and device
803 initialization from 16 to 32 bits in order to support very large namespaces.
805 Replaced all instances of %d in printf format specifiers with %u since nearly
806 all integers in ACPICA are unsigned.
808 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly returned
811 Example Code and Data Size: These are the sizes for the OS-independent
812 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
813 debug version of the code includes the debug output trace mechanism and has a
814 much larger code and data size.
817 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
818 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
820 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
821 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
823 2) iASL Compiler/Disassembler and Tools:
825 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
826 methods. These objects are defined by "Windows Instrumentation", and are not
827 part of the ACPI spec. ACPICA BZ 860.
829 AcpiExec: added option to disable the memory tracking mechanism. The -dt
830 option will disable the tracking mechanism, which improves performance
833 AcpiExec: Restructured the command line options into -d (disable) and -e
836 ----------------------------------------
837 28 April 2010. Summary of changes for version 20100428:
839 1) ACPI CA Core Subsystem:
841 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
842 including FADT-based and GPE Block Devices, execute any _PRW methods in the
843 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
844 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
845 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
846 Devices. Provides compatibility with other ACPI implementations. Two new
847 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob Moore.
849 Fixed a regression introduced in version 20100331 within the table manager
850 where initial table loading could fail. This was introduced in the fix for
851 AcpiReallocateRootTable. Also, renamed some of fields in the table manager
852 data structures to clarify their meaning and use.
854 Fixed a possible allocation overrun during internal object copy in
855 AcpiUtCopySimpleObject. The original code did not correctly handle the case
856 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ 847.
858 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
859 possible access beyond end-of-allocation. Also, now fully validate descriptor
860 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
862 Example Code and Data Size: These are the sizes for the OS-independent
863 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
864 debug version of the code includes the debug output trace mechanism and has a
865 much larger code and data size.
868 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
869 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
871 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
872 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
874 2) iASL Compiler/Disassembler and Tools:
876 iASL: Implemented Min/Max/Len/Gran validation for address resource
877 descriptors. This change implements validation for the address fields that
878 are common to all address-type resource descriptors. These checks are
879 implemented: Checks for valid Min/Max, length within the Min/Max window,
880 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as per
881 table 6-40 in the ACPI 4.0a specification. Also split the large aslrestype1.c
882 and aslrestype2.c files into five new files. ACPICA BZ 840.
884 iASL: Added support for the _Wxx predefined names. This support was missing
885 and these names were not recognized by the compiler as valid predefined
886 names. ACPICA BZ 851.
888 iASL: Added an error for all predefined names that are defined to return no
889 value and thus must be implemented as Control Methods. These include all of
890 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
891 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
893 iASL: Implemented the -ts option to emit hex AML data in ASL format, as an
894 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to be
895 dynamically loaded via the Load() operator. Also cleaned up output for the -
896 ta and -tc options. ACPICA BZ 853.
898 Tests: Added a new file with examples of extended iASL error checking.
899 Demonstrates the advanced error checking ability of the iASL compiler.
900 Available at tests/misc/badcode.asl.
902 ----------------------------------------
903 31 March 2010. Summary of changes for version 20100331:
905 1) ACPI CA Core Subsystem:
907 Completed a major update for the GPE support in order to improve support for
908 shared GPEs and to simplify both host OS and ACPICA code. Added a reference
909 count mechanism to support shared GPEs that require multiple device drivers.
910 Several external interfaces have changed. One external interface has been
911 removed. One new external interface was added. Most of the GPE external
912 interfaces now use the GPE spinlock instead of the events mutex (and the
913 Flags parameter for many GPE interfaces has been removed.) See the updated
914 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore, Rafael
915 Wysocki. ACPICA BZ 831.
918 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
924 Implemented write support for DataTable operation regions. These regions are
925 defined via the DataTableRegion() operator. Previously, only read support was
926 implemented. The ACPI specification allows DataTableRegions to be read/write,
929 Implemented a new subsystem option to force a copy of the DSDT to local
930 memory. Optionally copy the entire DSDT to local memory (instead of simply
931 mapping it.) There are some (albeit very rare) BIOSs that corrupt or replace
932 the original DSDT, creating the need for this option. Default is FALSE, do
935 Implemented detection of a corrupted or replaced DSDT. This change adds
936 support to detect a DSDT that has been corrupted and/or replaced from outside
937 the OS (by firmware). This is typically catastrophic for the system, but has
938 been seen on some machines. Once this problem has been detected, the DSDT
939 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
941 Fixed two problems with AcpiReallocateRootTable during the root table copy.
942 When copying the root table to the new allocation, the length used was
943 incorrect. The new size was used instead of the current table size, meaning
944 too much data was copied. Also, the count of available slots for ACPI tables
945 was not set correctly. Alexey Starikovskiy, Bob Moore.
947 Example Code and Data Size: These are the sizes for the OS-independent
948 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
949 debug version of the code includes the debug output trace mechanism and has a
950 much larger code and data size.
953 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
954 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
956 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
957 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
959 2) iASL Compiler/Disassembler and Tools:
961 iASL: Implement limited typechecking for values returned from predefined
962 control methods. The type of any returned static (unnamed) object is now
963 validated. For example, Return(1). ACPICA BZ 786.
965 iASL: Fixed a predefined name object verification regression. Fixes a problem
966 introduced in version 20100304. An error is incorrectly generated if a
967 predefined name is declared as a static named object with a value defined
968 using the keywords "Zero", "One", or "Ones". Lin Ming.
970 iASL: Added Windows 7 support for the -g option (get local ACPI tables) by
971 reducing the requested registry access rights. ACPICA BZ 842.
973 Disassembler: fixed a possible fault when generating External() statements.
974 Introduced in commit ae7d6fd: Properly handle externals with parent-prefix
975 (carat). Fixes a string length allocation calculation. Lin Ming.
977 ----------------------------------------
978 04 March 2010. Summary of changes for version 20100304:
980 1) ACPI CA Core Subsystem:
982 Fixed a possible problem with the AML Mutex handling function
983 AcpiExReleaseMutex where the function could fault under the very rare
984 condition when the interpreter has blocked, the interpreter lock is released,
985 the interpreter is then reentered via the same thread, and attempts to
986 acquire an AML mutex that was previously acquired. FreeBSD report 140979. Lin
989 Implemented additional configuration support for the AML "Debug Object".
990 Output from the debug object can now be enabled via a global variable,
991 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine debugging.
992 This debug output is now available in the release version of ACPICA instead
993 of just the debug version. Also, the entire debug output module can now be
994 configured out of the ACPICA build if desired. One new file added,
995 executer/exdebug.c. Lin Ming, Bob Moore.
997 Added header support for the ACPI MCHI table (Management Controller Host
998 Interface Table). This table was added in ACPI 4.0, but the defining document
999 has only recently become available.
1001 Standardized output of integer values for ACPICA warnings/errors. Always use
1002 0x prefix for hex output, always use %u for unsigned integer decimal output.
1003 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about 400
1004 invocations.) These invocations were converted from the original
1005 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
1007 Example Code and Data Size: These are the sizes for the OS-independent
1008 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1009 debug version of the code includes the debug output trace mechanism and has a
1010 much larger code and data size.
1013 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
1014 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
1016 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
1017 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
1019 2) iASL Compiler/Disassembler and Tools:
1021 iASL: Implemented typechecking support for static (non-control method)
1022 predefined named objects that are declared with the Name() operator. For
1023 example, the type of this object is now validated to be of type Integer:
1024 Name(_BBN, 1). This change migrates the compiler to using the core predefined
1025 name table instead of maintaining a local version. Added a new file,
1026 aslpredef.c. ACPICA BZ 832.
1028 Disassembler: Added support for the ACPI 4.0 MCHI table.
1030 ----------------------------------------
1031 21 January 2010. Summary of changes for version 20100121:
1033 1) ACPI CA Core Subsystem:
1035 Added the 2010 copyright to all module headers and signons. This affects
1036 virtually every file in the ACPICA core subsystem, the iASL compiler, the
1037 tools/utilities, and the test suites.
1039 Implemented a change to the AcpiGetDevices interface to eliminate unnecessary
1040 invocations of the _STA method. In the case where a specific _HID is
1041 requested, do not run _STA until a _HID match is found. This eliminates
1042 potentially dozens of _STA calls during a search for a particular device/HID,
1043 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
1045 Implemented an additional repair for predefined method return values. Attempt
1046 to repair unexpected NULL elements within returned Package objects. Create an
1047 Integer of value zero, a NULL String, or a zero-length Buffer as appropriate.
1048 ACPICA BZ 818. Lin Ming, Bob Moore.
1050 Removed the obsolete ACPI_INTEGER data type. This type was introduced as the
1051 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0 (with
1052 64-bit AML integers). It is now obsolete and this change removes it from the
1053 ACPICA code base, replaced by UINT64. The original typedef has been retained
1054 for now for compatibility with existing device driver code. ACPICA BZ 824.
1056 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field in
1057 the parse tree object.
1059 Added additional warning options for the gcc-4 generation. Updated the source
1060 accordingly. This includes some code restructuring to eliminate unreachable
1061 code, elimination of some gotos, elimination of unused return values, some
1062 additional casting, and removal of redundant declarations.
1064 Example Code and Data Size: These are the sizes for the OS-independent
1065 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1066 debug version of the code includes the debug output trace mechanism and has a
1067 much larger code and data size.
1070 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
1071 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
1073 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
1074 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
1076 2) iASL Compiler/Disassembler and Tools:
1078 No functional changes for this release.
1080 ----------------------------------------
1081 14 December 2009. Summary of changes for version 20091214:
1083 1) ACPI CA Core Subsystem:
1085 Enhanced automatic data type conversions for predefined name repairs. This
1086 change expands the automatic repairs/conversions for predefined name return
1087 values to make Integers, Strings, and Buffers fully interchangeable. Also, a
1088 Buffer can be converted to a Package of Integers if necessary. The nsrepair.c
1089 module was completely restructured. Lin Ming, Bob Moore.
1091 Implemented automatic removal of null package elements during predefined name
1092 repairs. This change will automatically remove embedded and trailing NULL
1093 package elements from returned package objects that are defined to contain a
1094 variable number of sub-packages. The driver is then presented with a package
1095 with no null elements to deal with. ACPICA BZ 819.
1097 Implemented a repair for the predefined _FDE and _GTM names. The expected
1098 return value for both names is a Buffer of 5 DWORDs. This repair fixes two
1099 possible problems (both seen in the field), where a package of integers is
1100 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk Kim.
1102 Implemented additional module-level code support. This change will properly
1103 execute module-level code that is not at the root of the namespace (under a
1104 Device object, etc.). Now executes the code within the current scope instead
1105 of the root. ACPICA BZ 762. Lin Ming.
1107 Fixed possible mutex acquisition errors when running _REG methods. Fixes a
1108 problem where mutex errors can occur when running a _REG method that is in
1109 the same scope as a method-defined operation region or an operation region
1110 under a module-level IF block. This type of code is rare, so the problem has
1111 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
1113 Fixed a possible memory leak during module-level code execution. An object
1114 could be leaked for each block of executed module-level code if the
1115 interpreter slack mode is enabled This change deletes any implicitly returned
1116 object from the module-level code block. Lin Ming.
1118 Removed messages for successful predefined repair(s). The repair mechanism
1119 was considered too wordy. Now, messages are only unconditionally emitted if
1120 the return object cannot be repaired. Existing messages for successful
1121 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ 827.
1123 Example Code and Data Size: These are the sizes for the OS-independent
1124 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1125 debug version of the code includes the debug output trace mechanism and has a
1126 much larger code and data size.
1129 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
1130 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
1132 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
1133 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
1135 2) iASL Compiler/Disassembler and Tools:
1137 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC files
1138 were no longer automatically removed at the termination of the compile.
1140 acpiexec: Implemented the -f option to specify default region fill value.
1141 This option specifies the value used to initialize buffers that simulate
1142 operation regions. Default value is zero. Useful for debugging problems that
1143 depend on a specific initial value for a region or field.
1145 ----------------------------------------
1146 12 November 2009. Summary of changes for version 20091112:
1148 1) ACPI CA Core Subsystem:
1150 Implemented a post-order callback to AcpiWalkNamespace. The existing
1151 interface only has a pre-order callback. This change adds an additional
1152 parameter for a post-order callback which will be more useful for bus scans.
1153 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
1155 Modified the behavior of the operation region memory mapping cache for
1156 SystemMemory. Ensure that the memory mappings created for operation regions
1157 do not cross 4K page boundaries. Crossing a page boundary while mapping
1158 regions can cause kernel warnings on some hosts if the pages have different
1159 attributes. Such regions are probably BIOS bugs, and this is the workaround.
1160 Linux BZ 14445. Lin Ming.
1162 Implemented an automatic repair for predefined methods that must return
1163 sorted lists. This change will repair (by sorting) packages returned by _ALR,
1164 _PSS, and _TSS. Drivers can now assume that the packages are correctly sorted
1165 and do not contain NULL package elements. Adds one new file,
1166 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
1168 Fixed a possible fault during predefined name validation if a return Package
1169 object contains NULL elements. Also adds a warning if a NULL element is
1170 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement may
1171 include repair or removal of all such NULL elements where possible.
1173 Implemented additional module-level executable AML code support. This change
1174 will execute module-level code that is not at the root of the namespace
1175 (under a Device object, etc.) at table load time. Module-level executable AML
1176 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
1178 Implemented a new internal function to create Integer objects. This function
1179 simplifies miscellaneous object creation code. ACPICA BZ 823.
1181 Reduced the severity of predefined repair messages, Warning to Info. Since
1182 the object was successfully repaired, a warning is too severe. Reduced to an
1183 info message for now. These messages may eventually be changed to debug-only.
1186 Example Code and Data Size: These are the sizes for the OS-independent
1187 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1188 debug version of the code includes the debug output trace mechanism and has a
1189 much larger code and data size.
1192 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
1193 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
1195 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
1196 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
1198 2) iASL Compiler/Disassembler and Tools:
1200 iASL: Implemented Switch() with While(1) so that Break works correctly. This
1201 change correctly implements the Switch operator with a surrounding While(1)
1202 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
1204 iASL: Added a message if a package initializer list is shorter than package
1205 length. Adds a new remark for a Package() declaration if an initializer list
1206 exists, but is shorter than the declared length of the package. Although
1207 technically legal, this is probably a coding error and it is seen in the
1208 field. ACPICA BZ 815. Lin Ming, Bob Moore.
1210 iASL: Fixed a problem where the compiler could fault after the maximum number
1211 of errors was reached (200).
1213 acpixtract: Fixed a possible warning for pointer cast if the compiler warning
1214 level set very high.
1216 ----------------------------------------
1217 13 October 2009. Summary of changes for version 20091013:
1219 1) ACPI CA Core Subsystem:
1221 Fixed a problem where an Operation Region _REG method could be executed more
1222 than once. If a custom address space handler is installed by the host before
1223 the "initialize operation regions" phase of the ACPICA initialization, any
1224 _REG methods for that address space could be executed twice. This change
1225 fixes the problem. ACPICA BZ 427. Lin Ming.
1227 Fixed a possible memory leak for the Scope() ASL operator. When the exact
1228 invocation of "Scope(\)" is executed (change scope to root), one internal
1229 operand object was leaked. Lin Ming.
1231 Implemented a run-time repair for the _MAT predefined method. If the _MAT
1232 return value is defined as a Field object in the AML, and the field
1233 size is less than or equal to the default width of an integer (32 or 64),_MAT
1234 can incorrectly return an Integer instead of a Buffer. ACPICA now
1235 automatically repairs this problem. ACPICA BZ 810.
1237 Implemented a run-time repair for the _BIF and _BIX predefined methods. The
1238 "OEM Information" field is often incorrectly returned as an Integer with
1239 value zero if the field is not supported by the platform. This is due to an
1240 ambiguity in the ACPI specification. The field should always be a string.
1241 ACPICA now automatically repairs this problem by returning a NULL string
1242 within the returned Package. ACPICA BZ 807.
1244 Example Code and Data Size: These are the sizes for the OS-independent
1245 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1246 debug version of the code includes the debug output trace mechanism and has a
1247 much larger code and data size.
1250 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
1251 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
1253 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
1254 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
1256 2) iASL Compiler/Disassembler and Tools:
1258 Disassembler: Fixed a problem where references to external symbols that
1259 contained one or more parent-prefixes (carats) were not handled correctly,
1260 possibly causing a fault. ACPICA BZ 806. Lin Ming.
1262 Disassembler: Restructured the code so that all functions that handle
1263 external symbols are in a single module. One new file is added,
1266 AML Debugger: Added a max count argument for the Batch command (which
1267 executes multiple predefined methods within the namespace.)
1269 iASL: Updated the compiler documentation (User Reference.) Available at
1270 http://www.acpica.org/documentation/. ACPICA BZ 750.
1272 AcpiXtract: Updated for Lint and other formatting changes. Close all open
1275 ----------------------------------------
1276 03 September 2009. Summary of changes for version 20090903:
1278 1) ACPI CA Core Subsystem:
1280 For Windows Vista compatibility, added the automatic execution of an _INI
1281 method located at the namespace root (\_INI). This method is executed at
1282 table load time. This support is in addition to the automatic execution of
1283 \_SB._INI. Lin Ming.
1285 Fixed a possible memory leak in the interpreter for AML package objects if
1286 the package initializer list is longer than the defined size of the package.
1287 This apparently can only happen if the BIOS changes the package size on the
1288 fly (seen in a _PSS object), as ASL compilers do not allow this. The
1289 interpreter will truncate the package to the defined size (and issue an error
1290 message), but previously could leave the extra objects undeleted if they were
1291 pre-created during the argument processing (such is the case if the package
1292 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
1294 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
1295 This has been reported in the field. Previously, ACPICA would zero out the
1296 buffer/string. Now, the operation is treated as a noop. Provides Windows
1297 compatibility. ACPICA BZ 803. Lin Ming.
1299 Removed an extraneous error message for ASL constructs of the form
1300 Store(LocalX,LocalX) when LocalX is uninitialized. These curious statements
1301 are seen in many BIOSs and are once again treated as NOOPs and no error is
1302 emitted when they are encountered. ACPICA BZ 785.
1304 Fixed an extraneous warning message if a _DSM reserved method returns a
1305 Package object. _DSM can return any type of object, so validation on the
1306 return type cannot be performed. ACPICA BZ 802.
1308 Example Code and Data Size: These are the sizes for the OS-independent
1309 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1310 debug version of the code includes the debug output trace mechanism and has a
1311 much larger code and data size.
1314 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
1315 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
1317 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
1318 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
1320 2) iASL Compiler/Disassembler and Tools:
1322 iASL: Fixed a problem with the use of the Alias operator and Resource
1323 Templates. The correct alias is now constructed and no error is emitted.
1326 iASL: Implemented the -I option to specify additional search directories for
1327 include files. Allows multiple additional search paths for include files.
1328 Directories are searched in the order specified on the command line (after
1329 the local directory is searched.) ACPICA BZ 800.
1331 iASL: Fixed a problem where the full pathname for include files was not
1332 emitted for warnings/errors. This caused the IDE support to not work
1333 properly. ACPICA BZ 765.
1335 iASL: Implemented the -@ option to specify a Windows-style response file
1336 containing additional command line options. ACPICA BZ 801.
1338 AcpiExec: Added support to load multiple AML files simultaneously (such as a
1339 DSDT and multiple SSDTs). Also added support for wildcards within the AML
1340 pathname. These features allow all machine tables to be easily loaded and
1341 debugged together. ACPICA BZ 804.
1343 Disassembler: Added missing support for disassembly of HEST table Error Bank
1346 ----------------------------------------
1347 30 July 2009. Summary of changes for version 20090730:
1349 The ACPI 4.0 implementation for ACPICA is complete with this release.
1351 1) ACPI CA Core Subsystem:
1353 ACPI 4.0: Added header file support for all new and changed ACPI tables.
1354 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are new
1355 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP, BERT,
1356 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT. There
1357 have been some ACPI 4.0 changes to other existing tables. Split the large
1358 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
1360 ACPI 4.0: Implemented predefined name validation for all new names. There are
1361 31 new names in ACPI 4.0. The predefined validation module was split into two
1362 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
1364 Implemented support for so-called "module-level executable code". This is
1365 executable AML code that exists outside of any control method and is intended
1366 to be executed at table load time. Although illegal since ACPI 2.0, this type
1367 of code still exists and is apparently still being created. Blocks of this
1368 code are now detected and executed as intended. Currently, the code blocks
1369 must exist under either an If, Else, or While construct; these are the
1370 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
1372 Implemented an automatic dynamic repair for predefined names that return
1373 nested Package objects. This applies to predefined names that are defined to
1374 return a variable-length Package of sub-packages. If the number of sub-
1375 packages is one, BIOS code is occasionally seen that creates a simple single
1376 package with no sub-packages. This code attempts to fix the problem by
1377 wrapping a new package object around the existing package. These methods can
1378 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA BZ
1381 Fixed a regression introduced in 20090625 for the AcpiGetDevices interface.
1382 The _HID/_CID matching was broken and no longer matched IDs correctly. ACPICA
1385 Fixed a problem with AcpiReset where the reset would silently fail if the
1386 register was one of the protected I/O ports. AcpiReset now bypasses the port
1387 validation mechanism. This may eventually be driven into the AcpiRead/Write
1390 Fixed a regression related to the recent update of the AcpiRead/Write
1391 interfaces. A sleep/suspend could fail if the optional PM2 Control register
1392 does not exist during an attempt to write the Bus Master Arbitration bit.
1393 (However, some hosts already delete the code that writes this bit, and the
1394 code may in fact be obsolete at this date.) ACPICA BZ 799.
1396 Fixed a problem where AcpiTerminate could fault if inadvertently called twice
1397 in succession. ACPICA BZ 795.
1399 Example Code and Data Size: These are the sizes for the OS-independent
1400 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1401 debug version of the code includes the debug output trace mechanism and has a
1402 much larger code and data size.
1405 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
1406 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
1408 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
1409 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
1411 2) iASL Compiler/Disassembler and Tools:
1413 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
1414 changes to existing tables. ACPICA BZ 775.
1416 ----------------------------------------
1417 25 June 2009. Summary of changes for version 20090625:
1419 The ACPI 4.0 Specification was released on June 16 and is available at
1420 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
1421 continue for the next few releases.
1423 1) ACPI CA Core Subsystem:
1425 ACPI 4.0: Implemented interpreter support for the IPMI operation region
1426 address space. Includes support for bi-directional data buffers and an IPMI
1427 address space handler (to be installed by an IPMI device driver.) ACPICA BZ
1430 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT. Includes
1431 support in both the header files and the disassembler.
1433 Completed a major update for the AcpiGetObjectInfo external interface.
1435 - Support for variable, unlimited length HID, UID, and CID strings.
1436 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA, etc.)
1437 - Call the _SxW power methods on behalf of a device object.
1438 - Determine if a device is a PCI root bridge.
1439 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
1440 These changes will require an update to all callers of this interface. See
1441 the updated ACPICA Programmer Reference for details. One new source file has
1442 been added - utilities/utids.c. ACPICA BZ 368, 780.
1444 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
1445 transfers. The Value parameter has been extended from 32 bits to 64 bits in
1446 order to support new ACPI 4.0 tables. These changes will require an update to
1447 all callers of these interfaces. See the ACPICA Programmer Reference for
1448 details. ACPICA BZ 768.
1450 Fixed several problems with AcpiAttachData. The handler was not invoked when
1451 the host node was deleted. The data sub-object was not automatically deleted
1452 when the host node was deleted. The interface to the handler had an unused
1453 parameter, this was removed. ACPICA BZ 778.
1455 Enhanced the function that dumps ACPI table headers. All non-printable
1456 characters in the string fields are now replaced with '?' (Signature, OemId,
1457 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
1458 these fields are occasionally seen in the field. ACPICA BZ 788.
1460 Fixed a problem with predefined method repair code where the code that
1461 attempts to repair/convert an object of incorrect type is only executed on
1462 the first time the predefined method is called. The mechanism that disables
1463 warnings on subsequent calls was interfering with the repair mechanism.
1466 Fixed a possible memory leak in the predefined validation/repair code when a
1467 buffer is automatically converted to an expected string object.
1469 Removed obsolete 16-bit files from the distribution and from the current git
1470 tree head. ACPICA BZ 776.
1472 Example Code and Data Size: These are the sizes for the OS-independent
1473 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1474 debug version of the code includes the debug output trace mechanism and has a
1475 much larger code and data size.
1478 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
1479 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
1481 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
1482 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
1484 2) iASL Compiler/Disassembler and Tools:
1486 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
1487 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
1489 ACPI 4.0: iASL - implemented compile-time validation support for all new
1490 predefined names and control methods (31 total). ACPICA BZ 769.
1492 ----------------------------------------
1493 21 May 2009. Summary of changes for version 20090521:
1495 1) ACPI CA Core Subsystem:
1497 Disabled the preservation of the SCI enable bit in the PM1 control register.
1498 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification to be
1499 a "preserved" bit - "OSPM always preserves this bit position", section
1500 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
1501 because the bit needs to be explicitly set by the OS as a workaround. No
1502 machines fail if the bit is not preserved. Therefore, ACPICA no longer
1503 attempts to preserve this bit.
1505 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
1506 incorrectly formed _PRT package could cause a fault. Added validation to
1507 ensure that each package element is actually a sub-package.
1509 Implemented a new interface to install or override a single control method,
1510 AcpiInstallMethod. This interface is useful when debugging in order to repair
1511 an existing method or to install a missing method without having to override
1512 the entire ACPI table. See the ACPICA Programmer Reference for use and
1513 examples. Lin Ming, Bob Moore.
1515 Fixed several reference count issues with the DdbHandle object that is
1516 created from a Load or LoadTable operator. Prevent premature deletion of the
1517 object. Also, mark the object as invalid once the table has been unloaded.
1518 This is needed because the handle itself may not be deleted after the table
1519 unload, depending on whether it has been stored in a named object by the
1522 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
1523 mutexes of the same sync level are acquired but then not released in strict
1524 opposite order, the internally maintained Current Sync Level becomes confused
1525 and can cause subsequent execution errors. ACPICA BZ 471.
1527 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
1528 specification has been changed to make the SyncLevel for mutex objects more
1529 useful. When releasing a mutex, the SyncLevel of the mutex must now be the
1530 same as the current sync level. This makes more sense than the previous rule
1531 (SyncLevel less than or equal). This change updates the code to match the
1534 Fixed a problem with the local version of the AcpiOsPurgeCache function. The
1535 (local) cache must be locked during all cache object deletions. Andrew
1538 Updated the Load operator to use operation region interfaces. This replaces
1539 direct memory mapping with region access calls. Now, all region accesses go
1540 through the installed region handler as they should.
1542 Simplified and optimized the NsGetNextNode function. Reduced parameter count
1543 and reduced code for this frequently used function.
1545 Example Code and Data Size: These are the sizes for the OS-independent
1546 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1547 debug version of the code includes the debug output trace mechanism and has a
1548 much larger code and data size.
1551 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
1552 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
1554 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
1555 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
1557 2) iASL Compiler/Disassembler and Tools:
1559 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some problems
1560 with sub-table disassembly and handling invalid sub-tables. Attempt recovery
1561 after an invalid sub-table ID.
1563 ----------------------------------------
1564 22 April 2009. Summary of changes for version 20090422:
1566 1) ACPI CA Core Subsystem:
1568 Fixed a compatibility issue with the recently released I/O port protection
1569 mechanism. For windows compatibility, 1) On a port protection violation,
1570 simply ignore the request and do not return an exception (allow the control
1571 method to continue execution.) 2) If only part of the request overlaps a
1572 protected port, read/write the individual ports that are not protected. Linux
1575 Enhanced the execution of the ASL/AML BreakPoint operator so that it actually
1576 breaks into the AML debugger if the debugger is present. This matches the
1577 ACPI-defined behavior.
1579 Fixed several possible warnings related to the use of the configurable
1580 ACPI_THREAD_ID. This type can now be configured as either an integer or a
1581 pointer with no warnings. Also fixes several warnings in printf-like
1582 statements for the 64-bit build when the type is configured as a pointer.
1585 Fixed a number of possible warnings when compiling with gcc 4+ (depending on
1586 warning options.) Examples include printf formats, aliasing, unused globals,
1587 missing prototypes, missing switch default statements, use of non-ANSI
1588 library functions, use of non-ANSI constructs. See generate/unix/Makefile for
1589 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
1591 Example Code and Data Size: These are the sizes for the OS-independent
1592 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1593 debug version of the code includes the debug output trace mechanism and has a
1594 much larger code and data size.
1597 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
1598 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
1600 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
1601 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
1603 2) iASL Compiler/Disassembler and Tools:
1605 iASL: Fixed a generation warning from Bison 2.3 and fixed several warnings on
1608 iASL: Fixed a problem where the Unix/Linux versions of the compiler could not
1609 correctly digest Windows/DOS formatted files (with CR/LF).
1611 iASL: Added a new option for "quiet mode" (-va) that produces only the
1612 compilation summary, not individual errors and warnings. Useful for large
1615 AcpiExec: Implemented a new option (-z) to enable a forced semaphore/mutex
1616 timeout that can be used to detect hang conditions during execution of AML
1617 code (includes both internal semaphores and AML-defined mutexes and events.)
1619 Added new makefiles for the generation of acpica in a generic unix-like
1620 environment. These makefiles are intended to generate the acpica tools and
1621 utilities from the original acpica git source tree structure.
1623 Test Suites: Updated and cleaned up the documentation files. Updated the
1624 copyrights to 2009, affecting all source files. Use the new version of iASL
1625 with quiet mode. Increased the number of available semaphores in the Windows
1626 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL, added
1627 an alternate implementation of the semaphore timeout to allow aslts to
1628 execute fully on Cygwin.
1630 ----------------------------------------
1631 20 March 2009. Summary of changes for version 20090320:
1633 1) ACPI CA Core Subsystem:
1635 Fixed a possible race condition between AcpiWalkNamespace and dynamic table
1636 unloads. Added a reader/writer locking mechanism to allow multiple concurrent
1637 namespace walks (readers), but block a dynamic table unload until it can gain
1638 exclusive write access to the namespace. This fixes a problem where a table
1639 unload could (possibly catastrophically) delete the portion of the namespace
1640 that is currently being examined by a walk. Adds a new file, utlock.c, that
1641 implements the reader/writer lock mechanism. ACPICA BZ 749.
1643 Fixed a regression introduced in version 20090220 where a change to the FADT
1644 handling could cause the ACPICA subsystem to access non-existent I/O ports.
1646 Modified the handling of FADT register and table (FACS/DSDT) addresses. The
1647 FADT can contain both 32-bit and 64-bit versions of these addresses.
1648 Previously, the 64-bit versions were favored, meaning that if both 32 and 64
1649 versions were valid, but not equal, the 64-bit version was used. This was
1650 found to cause some machines to fail. Now, in this case, the 32-bit version
1651 is used instead. This now matches the Windows behavior.
1653 Implemented a new mechanism to protect certain I/O ports. Provides Microsoft
1654 compatibility and protects the standard PC I/O ports from access via AML
1655 code. Adds a new file, hwvalid.c
1657 Fixed a possible extraneous warning message from the FADT support. The
1658 message warns of a 32/64 length mismatch between the legacy and GAS
1659 definitions for a register.
1661 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface is
1662 made obsolete by the port protection mechanism above. It was previously used
1663 to validate the entire address range of an operation region, which could be
1664 incorrect if the range included illegal ports, but fields within the
1665 operation region did not actually access those ports. Validation is now
1666 performed on a per-field basis instead of the entire region.
1668 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
1669 Ignored bits must be "preserved" according to the ACPI spec. Usually, this
1670 means a read/modify/write when writing to the register. However, for status
1671 registers, writing a one means clear the event. Writing a zero means preserve
1672 the event (do not clear.) This behavior is clarified in the ACPI 4.0 spec,
1673 and the ACPICA code now simply always writes a zero to the ignored bit.
1675 Modified the handling of ignored bits for the PM1 A/B Control Registers. As
1676 per the ACPI specification, for the control registers, preserve
1677 (read/modify/write) all bits that are defined as either reserved or ignored.
1679 Updated the handling of write-only bits in the PM1 A/B Control Registers.
1680 When reading the register, zero the write-only bits as per the ACPI spec.
1681 ACPICA BZ 443. Lin Ming.
1683 Removed "Linux" from the list of supported _OSI strings. Linux no longer
1684 wants to reply true to this request. The Windows strings are the only paths
1685 through the AML that are tested and known to work properly.
1688 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
1689 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
1691 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
1692 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
1694 2) iASL Compiler/Disassembler and Tools:
1696 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c and
1699 ----------------------------------------
1700 20 February 2009. Summary of changes for version 20090220:
1702 1) ACPI CA Core Subsystem:
1704 Optimized the ACPI register locking. Removed locking for reads from the ACPI
1705 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is
1706 not required when reading the single-bit registers. The
1707 AcpiGetRegisterUnlocked function is no longer needed and has been removed.
1708 This will improve performance for reads on these registers. ACPICA BZ 760.
1710 Fixed the parameter validation for AcpiRead/Write. Now return
1711 AE_BAD_PARAMETER if the input register pointer is null, and AE_BAD_ADDRESS if
1712 the register has an address of zero. Previously, these cases simply returned
1713 AE_OK. For optional registers such as PM1B status/enable/control, the caller
1714 should check for a valid register address before calling. ACPICA BZ 748.
1716 Renamed the external ACPI bit register access functions. Renamed
1717 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
1718 functions. The new names are AcpiReadBitRegister and AcpiWriteBitRegister.
1719 Also, restructured the code for these functions by simplifying the code path
1720 and condensing duplicate code to reduce code size.
1722 Added new functions to transparently handle the possibly split PM1 A/B
1723 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two functions
1724 now handle the split registers for PM1 Status, Enable, and Control. ACPICA BZ
1727 Added a function to handle the PM1 control registers, AcpiHwWritePm1Control.
1728 This function writes both of the PM1 control registers (A/B). These registers
1729 are different than the PM1 A/B status and enable registers in that different
1730 values can be written to the A/B registers. Most notably, the SLP_TYP bits
1731 can be different, as per the values returned from the _Sx predefined methods.
1733 Removed an extra register write within AcpiHwClearAcpiStatus. This function
1734 was writing an optional PM1B status register twice. The existing call to the
1735 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1 A/B
1736 register. ACPICA BZ 751.
1738 Split out the PM1 Status registers from the FADT. Added new globals for these
1739 registers (A/B), similar to the way the PM1 Enable registers are handled.
1740 Instead of overloading the FADT Event Register blocks. This makes the code
1741 clearer and less prone to error.
1743 Fixed the warning message for when the platform contains too many ACPI tables
1744 for the default size of the global root table data structure. The calculation
1745 for the truncation value was incorrect.
1747 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
1748 obsolete macro, since it is now a simple reference to ->common.type. There
1749 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
1751 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
1752 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
1753 simply SLEEP_TYPE. ACPICA BZ 754.
1755 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
1756 function is only needed on 64-bit host operating systems and is thus not
1757 included for 32-bit hosts.
1759 Debug output: print the input and result for invocations of the _OSI reserved
1760 control method via the ACPI_LV_INFO debug level. Also, reduced some of the
1761 verbosity of this debug level. Len Brown.
1763 Example Code and Data Size: These are the sizes for the OS-independent
1764 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1765 debug version of the code includes the debug output trace mechanism and has a
1766 much larger code and data size.
1769 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
1770 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
1772 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
1773 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
1775 2) iASL Compiler/Disassembler and Tools:
1777 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
1778 various legal performance profiles.
1780 ----------------------------------------
1781 23 January 2009. Summary of changes for version 20090123:
1783 1) ACPI CA Core Subsystem:
1785 Added the 2009 copyright to all module headers and signons. This affects
1786 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1787 the tools/utilities.
1789 Implemented a change to allow the host to override any ACPI table, including
1790 dynamically loaded tables. Previously, only the DSDT could be replaced by the
1791 host. With this change, the AcpiOsTableOverride interface is called for each
1792 table found in the RSDT/XSDT during ACPICA initialization, and also whenever
1793 a table is dynamically loaded via the AML Load operator.
1795 Updated FADT flag definitions, especially the Boot Architecture flags.
1797 Debugger: For the Find command, automatically pad the input ACPI name with
1798 underscores if the name is shorter than 4 characters. This enables a match
1799 with the actual namespace entry which is itself padded with underscores.
1801 Example Code and Data Size: These are the sizes for the OS-independent
1802 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1803 debug version of the code includes the debug output trace mechanism and has a
1804 much larger code and data size.
1807 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
1808 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
1810 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
1811 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
1813 2) iASL Compiler/Disassembler and Tools:
1815 Fix build error under Bison-2.4.
1817 Dissasembler: Enhanced FADT support. Added decoding of the Boot Architecture
1818 flags. Now decode all flags, regardless of the FADT version. Flag output
1819 includes the FADT version which first defined each flag.
1821 The iASL -g option now dumps the RSDT to a file (in addition to the FADT and
1822 DSDT). Windows only.
1824 ----------------------------------------
1825 04 December 2008. Summary of changes for version 20081204:
1827 1) ACPI CA Core Subsystem:
1829 The ACPICA Programmer Reference has been completely updated and revamped for
1830 this release. This includes updates to the external interfaces, OSL
1831 interfaces, the overview sections, and the debugger reference.
1833 Several new ACPICA interfaces have been implemented and documented in the
1834 programmer reference:
1835 AcpiReset - Writes the reset value to the FADT-defined reset register.
1836 AcpiDisableAllGpes - Disable all available GPEs.
1837 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
1838 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
1839 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
1840 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
1841 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
1843 Most of the public ACPI hardware-related interfaces have been moved to a new
1844 file, components/hardware/hwxface.c
1846 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
1847 register lengths within the FADT are now used, and the low level ACPI
1848 register access no longer hardcodes the ACPI register lengths. Given that
1849 there may be some risk in actually trusting the FADT register lengths, a run-
1850 time option was added to fall back to the default hardcoded lengths if the
1851 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
1852 option is set to true for now, and a warning is issued if a suspicious FADT
1853 register length is overridden with the default value.
1855 Fixed a reference count issue in NsRepairObject. This problem was introduced
1856 in version 20081031 as part of a fix to repair Buffer objects within
1859 Added semaphore support to the Linux/Unix application OS-services layer
1860 (OSL). ACPICA BZ 448. Lin Ming.
1862 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes will
1863 be implemented in the OSL, or will binary semaphores be used instead.
1865 Example Code and Data Size: These are the sizes for the OS-independent
1866 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1867 debug version of the code includes the debug output trace mechanism and has a
1868 much larger code and data size.
1871 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
1872 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
1874 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
1875 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
1877 2) iASL Compiler/Disassembler and Tools:
1879 iASL: Completed the '-e' option to include additional ACPI tables in order to
1880 aid with disassembly and External statement generation. ACPICA BZ 742. Lin
1883 iASL: Removed the "named object in while loop" error. The compiler cannot
1884 determine how many times a loop will execute. ACPICA BZ 730.
1886 Disassembler: Implemented support for FADT revision 2 (MS extension). ACPICA
1889 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and MCFG).
1891 ----------------------------------------
1892 31 October 2008. Summary of changes for version 20081031:
1894 1) ACPI CA Core Subsystem:
1896 Restructured the ACPICA header files into public/private. acpi.h now includes
1897 only the "public" acpica headers. All other acpica headers are "private" and
1898 should not be included by acpica users. One new file, accommon.h is used to
1899 include the commonly used private headers for acpica code generation. Future
1900 plans include moving all private headers to a new subdirectory.
1902 Implemented an automatic Buffer->String return value conversion for
1903 predefined ACPI methods. For these methods (such as _BIF), added automatic
1904 conversion for return objects that are required to be a String, but a Buffer
1905 was found instead. This can happen when reading string battery data from an
1906 operation region, because it used to be difficult to convert the data from
1907 buffer to string from within the ASL. Ensures that the host OS is provided
1908 with a valid null-terminated string. Linux BZ 11822.
1910 Updated the FACS waking vector interfaces. Split AcpiSetFirmwareWakingVector
1911 into two: one for the 32-bit vector, another for the 64-bit vector. This is
1912 required because the host OS must setup the wake much differently for each
1913 vector (real vs. protected mode, etc.) and the interface itself should not be
1914 deciding which vector to use. Also, eliminated the GetFirmwareWakingVector
1915 interface, as it served no purpose (only the firmware reads the vector, OS
1916 only writes the vector.) ACPICA BZ 731.
1918 Implemented a mechanism to escape infinite AML While() loops. Added a loop
1919 counter to force exit from AML While loops if the count becomes too large.
1920 This can occur in poorly written AML when the hardware does not respond
1921 within a while loop and the loop does not implement a timeout. The maximum
1922 loop count is configurable. A new exception code is returned when a loop is
1923 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
1925 Optimized the execution of AML While loops. Previously, a control state
1926 object was allocated and freed for each execution of the loop. The
1927 optimization is to simply reuse the control state for each iteration. This
1928 speeds up the raw loop execution time by about 5%.
1930 Enhanced the implicit return mechanism. For Windows compatibility, return an
1931 implicit integer of value zero for methods that contain no executable code.
1932 Such methods are seen in the field as stubs (presumably), and can cause
1933 drivers to fail if they expect a return value. Lin Ming.
1935 Allow multiple backslashes as root prefixes in namepaths. In a fully
1936 qualified namepath, allow multiple backslash prefixes. This can happen (and
1937 is seen in the field) because of the use of a double-backslash in strings
1938 (since backslash is the escape character) causing confusion. ACPICA BZ 739
1941 Emit a warning if two different FACS or DSDT tables are discovered in the
1942 FADT. Checks if there are two valid but different addresses for the FACS and
1943 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
1945 Consolidated the method argument count validation code. Merged the code that
1946 validates control method argument counts into the predefined validation
1947 module. Eliminates possible multiple warnings for incorrect argument counts.
1949 Implemented ACPICA example code. Includes code for ACPICA initialization,
1950 handler installation, and calling a control method. Available at
1951 source/tools/examples.
1953 Added a global pointer for FACS table to simplify internal FACS access. Use
1954 the global pointer instead of using AcpiGetTableByIndex for each FACS access.
1955 This simplifies the code for the Global Lock and the Firmware Waking
1958 Example Code and Data Size: These are the sizes for the OS-independent
1959 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1960 debug version of the code includes the debug output trace mechanism and has a
1961 much larger code and data size.
1964 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
1965 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
1967 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
1968 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
1970 2) iASL Compiler/Disassembler and Tools:
1972 iASL: Improved disassembly of external method calls. Added the -e option to
1973 allow the inclusion of additional ACPI tables to help with the disassembly of
1974 method invocations and the generation of external declarations during the
1975 disassembly. Certain external method invocations cannot be disassembled
1976 properly without the actual declaration of the method. Use the -e option to
1977 include the table where the external method(s) are actually declared. Most
1978 useful for disassembling SSDTs that make method calls back to the master
1979 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl -d
1980 -e dsdt.aml ssdt1.aml
1982 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
1983 problem where the use of an alias within a namepath would result in a not
1984 found error or cause the compiler to fault. Also now allows forward
1985 references from the Alias operator itself. ACPICA BZ 738.
1987 ----------------------------------------
1988 26 September 2008. Summary of changes for version 20080926:
1990 1) ACPI CA Core Subsystem:
1992 Designed and implemented a mechanism to validate predefined ACPI methods and
1993 objects. This code validates the predefined ACPI objects (objects whose names
1994 start with underscore) that appear in the namespace, at the time they are
1995 evaluated. The argument count and the type of the returned object are
1996 validated against the ACPI specification. The purpose of this validation is
1997 to detect problems with the BIOS-implemented predefined ACPI objects before
1998 the results are returned to the ACPI-related drivers. Future enhancements may
1999 include actual repair of incorrect return objects where possible. Two new
2000 files are nspredef.c and acpredef.h.
2002 Fixed a fault in the AML parser if a memory allocation fails during the Op
2003 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
2005 Fixed an issue with implicit return compatibility. This change improves the
2006 implicit return mechanism to be more compatible with the MS interpreter. Lin
2007 Ming, ACPICA BZ 349.
2009 Implemented support for zero-length buffer-to-string conversions. Allow zero
2010 length strings during interpreter buffer-to-string conversions. For example,
2011 during the ToDecimalString and ToHexString operators, as well as implicit
2012 conversions. Fiodor Suietov, ACPICA BZ 585.
2014 Fixed two possible memory leaks in the error exit paths of
2015 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions are
2016 similar in that they use a stack of state objects in order to eliminate
2017 recursion. The stack must be fully unwound and deallocated if an error
2018 occurs. Lin Ming. ACPICA BZ 383.
2020 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the global
2021 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
2022 Moore ACPICA BZ 442.
2024 Removed the obsolete version number in module headers. Removed the
2025 "$Revision" number that appeared in each module header. This version number
2026 was useful under SourceSafe and CVS, but has no meaning under git. It is not
2027 only incorrect, it could also be misleading.
2029 Example Code and Data Size: These are the sizes for the OS-independent
2030 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2031 debug version of the code includes the debug output trace mechanism and has a
2032 much larger code and data size.
2035 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
2036 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
2038 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
2039 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
2041 ----------------------------------------
2042 29 August 2008. Summary of changes for version 20080829:
2044 1) ACPI CA Core Subsystem:
2046 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
2047 Reference. Changes include the elimination of cheating on the Object field
2048 for the DdbHandle subtype, addition of a reference class field to
2049 differentiate the various reference types (instead of an AML opcode), and the
2050 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
2052 Reduce an error to a warning for an incorrect method argument count.
2053 Previously aborted with an error if too few arguments were passed to a
2054 control method via the external ACPICA interface. Now issue a warning instead
2055 and continue. Handles the case where the method inadvertently declares too
2056 many arguments, but does not actually use the extra ones. Applies mainly to
2057 the predefined methods. Lin Ming. Linux BZ 11032.
2059 Disallow the evaluation of named object types with no intrinsic value. Return
2060 AE_TYPE for objects that have no value and therefore evaluation is undefined:
2061 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation of
2062 these types were allowed, but an exception would be generated at some point
2063 during the evaluation. Now, the error is generated up front.
2065 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
2066 (nsnames.c). Fixes a leak in the error exit path.
2068 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These debug
2069 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and ACPI_EXCEPTION
2070 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
2073 Removed obsolete and/or unused exception codes from the acexcep.h header.
2074 There is the possibility that certain device drivers may be affected if they
2075 use any of these exceptions.
2077 The ACPICA documentation has been added to the public git source tree, under
2078 acpica/documents. Included are the ACPICA programmer reference, the iASL
2079 compiler reference, and the changes.txt release logfile.
2081 Example Code and Data Size: These are the sizes for the OS-independent
2082 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2083 debug version of the code includes the debug output trace mechanism and has a
2084 much larger code and data size.
2087 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
2088 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
2090 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
2091 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
2093 2) iASL Compiler/Disassembler and Tools:
2095 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
2096 defines _SCP with 3 arguments. Previous versions defined it with only 1
2097 argument. iASL now allows both definitions.
2099 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for zero-
2100 length subtables when disassembling ACPI tables. Also fixed a couple of
2101 errors where a full 16-bit table type field was not extracted from the input
2104 acpisrc: Improve comment counting mechanism for generating source code
2105 statistics. Count first and last lines of multi-line comments as whitespace,
2106 not comment lines. Handle Linux legal header in addition to standard acpica
2109 ----------------------------------------
2111 29 July 2008. Summary of changes for version 20080729:
2113 1) ACPI CA Core Subsystem:
2115 Fix a possible deadlock in the GPE dispatch. Remove call to
2116 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will attempt
2117 to acquire the GPE lock but can deadlock since the GPE lock is already held
2118 at dispatch time. This code was introduced in version 20060831 as a response
2119 to Linux BZ 6881 and has since been removed from Linux.
2121 Add a function to dereference returned reference objects. Examines the return
2122 object from a call to AcpiEvaluateObject. Any Index or RefOf references are
2123 automatically dereferenced in an attempt to return something useful (these
2124 reference types cannot be converted into an external ACPI_OBJECT.) Provides
2125 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
2127 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
2128 subtables for the MADT and one new subtable for the SRAT. Includes
2129 disassembler and AcpiSrc support. Data from the Intel 64 Architecture x2APIC
2130 Specification, June 2008.
2132 Additional error checking for pathname utilities. Add error check after all
2133 calls to AcpiNsGetPathnameLength. Add status return from
2134 AcpiNsBuildExternalPath and check after all calls. Add parameter validation
2135 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
2137 Return status from the global init function AcpiUtGlobalInitialize. This is
2138 used by both the kernel subsystem and the utilities such as iASL compiler.
2139 The function could possibly fail when the caches are initialized. Yang Yi.
2141 Add a function to decode reference object types to strings. Created for
2142 improved error messages.
2144 Improve object conversion error messages. Better error messages during object
2145 conversion from internal to the external ACPI_OBJECT. Used for external calls
2146 to AcpiEvaluateObject.
2148 Example Code and Data Size: These are the sizes for the OS-independent
2149 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2150 debug version of the code includes the debug output trace mechanism and has a
2151 much larger code and data size.
2154 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
2155 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
2157 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
2158 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
2160 2) iASL Compiler/Disassembler and Tools:
2162 Debugger: fix a possible hang when evaluating non-methods. Fixes a problem
2163 introduced in version 20080701. If the object being evaluated (via execute
2164 command) is not a method, the debugger can hang while trying to obtain non-
2165 existent parameters.
2167 iASL: relax error for using reserved "_T_x" identifiers. These names can
2168 appear in a disassembled ASL file if they were emitted by the original
2169 compiler. Instead of issuing an error or warning and forcing the user to
2170 manually change these names, issue a remark instead.
2172 iASL: error if named object created in while loop. Emit an error if any named
2173 object is created within a While loop. If allowed, this code will generate a
2174 run-time error on the second iteration of the loop when an attempt is made to
2175 create the same named object twice. ACPICA bugzilla 730.
2177 iASL: Support absolute pathnames for include files. Add support for absolute
2178 pathnames within the Include operator. previously, only relative pathnames
2181 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource Descriptor.
2182 The ACPI spec requires one interrupt minimum. BZ 423
2184 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
2185 Handles the case for the Interrupt Resource Descriptor where
2186 the ResourceSource argument is omitted but ResourceSourceIndex
2187 is present. Now leave room for the Index. BZ 426
2189 iASL: Prevent error message if CondRefOf target does not exist. Fixes cases
2190 where an error message is emitted if the target does not exist. BZ 516
2192 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
2193 (get ACPI tables on Windows). This was apparently broken in version 20070919.
2195 AcpiXtract: Handle EOF while extracting data. Correctly handle the case where
2196 the EOF happens immediately after the last table in the input file. Print
2197 completion message. Previously, no message was displayed in this case.
2199 ----------------------------------------
2200 01 July 2008. Summary of changes for version 20080701:
2202 0) Git source tree / acpica.org
2204 Fixed a problem where a git-clone from http would not transfer the entire
2207 1) ACPI CA Core Subsystem:
2209 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
2210 enable bit. Now performs a read-change-write of the enable register instead
2211 of simply writing out the cached enable mask. This will prevent inadvertent
2212 enabling of GPEs if a rogue GPE is received during initialization (before GPE
2213 handlers are installed.)
2215 Implemented a copy for dynamically loaded tables. Previously, dynamically
2216 loaded tables were simply mapped - but on some machines this memory is
2217 corrupted after suspend. Now copy the table to a local buffer. For the
2218 OpRegion case, added checksum verify. Use the table length from the table
2219 header, not the region length. For the Buffer case, use the table length
2220 also. Dennis Noordsij, Bob Moore. BZ 10734
2222 Fixed a problem where the same ACPI table could not be dynamically loaded and
2223 unloaded more than once. Without this change, a table cannot be loaded again
2224 once it has been loaded/unloaded one time. The current mechanism does not
2225 unregister a table upon an unload. During a load, if the same table is found,
2226 this no longer returns an exception. BZ 722
2228 Fixed a problem where the wrong descriptor length was calculated for the
2229 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as EndTag
2230 are calculated as 12 bytes long, but the actual length in the internal
2231 descriptor is 16 because of the round-up to 8 on the 64-bit build. Reported
2232 by Linn Crosetto. BZ 728
2234 Fixed a possible memory leak in the Unload operator. The DdbHandle returned
2235 by Load() did not have its reference count decremented during unload, leading
2236 to a memory leak. Lin Ming. BZ 727
2238 Fixed a possible memory leak when deleting thermal/processor objects. Any
2239 associated notify handlers (and objects) were not being deleted. Fiodor
2242 Fixed the ordering of the ASCII names in the global mutex table to match the
2243 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug only.
2244 Vegard Nossum. BZ 726
2246 Enhanced the AcpiGetObjectInfo interface to return the number of required
2247 arguments if the object is a control method. Added this call to the debugger
2248 so the proper number of default arguments are passed to a method. This
2249 prevents a warning when executing methods from AcpiExec.
2251 Added a check for an invalid handle in AcpiGetObjectInfo. Return
2252 AE_BAD_PARAMETER if input handle is invalid. BZ 474
2254 Fixed an extraneous warning from exconfig.c on the 64-bit build.
2256 Example Code and Data Size: These are the sizes for the OS-independent
2257 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2258 debug version of the code includes the debug output trace mechanism and has a
2259 much larger code and data size.
2262 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
2263 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
2265 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
2266 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
2268 2) iASL Compiler/Disassembler and Tools:
2270 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
2271 resource descriptor names.
2273 iASL: Detect invalid ASCII characters in input (windows version). Removed the
2274 "-CF" flag from the flex compile, enables correct detection of non-ASCII
2275 characters in the input. BZ 441
2277 iASL: Eliminate warning when result of LoadTable is not used. Eliminate the
2278 "result of operation not used" warning when the DDB handle returned from
2279 LoadTable is not used. The warning is not needed. BZ 590
2281 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG method to
2282 pass address of table to the AML. Added option to disable OpRegion simulation
2283 to allow creation of an OpRegion with a real address that was passed to _CFG.
2284 All of this allows testing of the Load and Unload operators from AcpiExec.
2286 Debugger: update tables command for unloaded tables. Handle unloaded tables
2287 and use the standard table header output routine.
2289 ----------------------------------------
2290 09 June 2008. Summary of changes for version 20080609:
2292 1) ACPI CA Core Subsystem:
2294 Implemented a workaround for reversed _PRT entries. A significant number of
2295 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
2296 change dynamically detects and repairs this problem. Provides compatibility
2297 with MS ACPI. BZ 6859
2299 Simplified the internal ACPI hardware interfaces to eliminate the locking
2300 flag parameter from Register Read/Write. Added a new external interface,
2301 AcpiGetRegisterUnlocked.
2303 Fixed a problem where the invocation of a GPE control method could hang. This
2304 was a regression introduced in 20080514. The new method argument count
2305 validation mechanism can enter an infinite loop when a GPE method is
2306 dispatched. Problem fixed by removing the obsolete code that passed GPE block
2307 information to the notify handler via the control method parameter pointer.
2309 Fixed a problem where the _SST execution status was incorrectly returned to
2310 the caller of AcpiEnterSleepStatePrep. This was a regression introduced in
2311 20080514. _SST is optional and a NOT_FOUND exception should never be
2314 Fixed a problem where a deleted object could be accessed from within the AML
2315 parser. This was a regression introduced in version 20080123 as a fix for the
2316 Unload operator. Lin Ming. BZ 10669
2318 Cleaned up the debug operand dump mechanism. Eliminated unnecessary operands
2319 and eliminated the use of a negative index in a loop. Operands are now
2320 displayed in the correct order, not backwards. This also fixes a regression
2321 introduced in 20080514 on 64-bit systems where the elimination of
2322 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ 715
2324 Fixed a possible memory leak in EvPciConfigRegionSetup where the error exit
2325 path did not delete a locally allocated structure.
2327 Updated definitions for the DMAR and SRAT tables to synchronize with the
2328 current specifications. Includes disassembler support.
2330 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
2331 loop termination value was used. Loop terminated on iteration early, missing
2332 one mutex. Linn Crosetto
2334 Example Code and Data Size: These are the sizes for the OS-independent
2335 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2336 debug version of the code includes the debug output trace mechanism and has a
2337 much larger code and data size.
2340 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
2341 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
2343 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
2344 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
2346 2) iASL Compiler/Disassembler and Tools:
2348 Disassembler: Implemented support for EisaId() within _CID objects. Now
2349 disassemble integer _CID objects back to EisaId invocations, including
2350 multiple integers within _CID packages. Includes single-step support for
2353 Disassembler: Added support for DMAR and SRAT table definition changes.
2355 ----------------------------------------
2356 14 May 2008. Summary of changes for version 20080514:
2358 1) ACPI CA Core Subsystem:
2360 Fixed a problem where GPEs were enabled too early during the ACPICA
2361 initialization. This could lead to "handler not installed" errors on some
2362 machines. Moved GPE enable until after _REG/_STA/_INI methods are run. This
2363 ensures that all operation regions and devices throughout the namespace have
2364 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
2366 Implemented a change to the enter sleep code. Moved execution of the _GTS
2367 method to just before setting sleep enable bit. The execution was moved from
2368 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
2369 immediately before the SLP_EN bit is set, as per the ACPI specification.
2372 Implemented a fix to disable unknown GPEs (2nd version). Now always disable
2373 the GPE, even if ACPICA thinks that that it is already disabled. It is
2374 possible that the AML or some other code has enabled the GPE unbeknownst to
2377 Fixed a problem with the Field operator where zero-length fields would return
2378 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length ASL
2379 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
2381 Implemented a fix for the Load operator, now load the table at the namespace
2382 root. This reverts a change introduced in version 20071019. The table is now
2383 loaded at the namespace root even though this goes against the ACPI
2384 specification. This provides compatibility with other ACPI implementations.
2385 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin Ming.
2387 Fixed a problem where ACPICA would not Load() tables with unusual signatures.
2388 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
2389 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
2390 Therefore, signature validation is worthless. Apparently MS ACPI accepts such
2391 signatures, ACPICA must be compatible. BZ 10454.
2393 Fixed a possible negative array index in AcpiUtValidateException. Added NULL
2394 fields to the exception string arrays to eliminate a -1 subtraction on the
2397 Updated the debug tracking macros to reduce overall code and data size.
2398 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
2399 instead of pointers to static strings. Jan Beulich and Bob Moore.
2401 Implemented argument count checking in control method invocation via
2402 AcpiEvaluateObject. Now emit an error if too few arguments, warning if too
2403 many. This applies only to extern programmatic control method execution, not
2404 method-to-method calls within the AML. Lin Ming.
2406 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is no
2407 longer needed, especially with the removal of 16-bit support. It was replaced
2408 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64 bit on
2409 32/64-bit platforms is required.
2411 Added the C const qualifier for appropriate string constants -- mostly
2412 MODULE_NAME and printf format strings. Jan Beulich.
2414 Example Code and Data Size: These are the sizes for the OS-independent
2415 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2416 debug version of the code includes the debug output trace mechanism and has a
2417 much larger code and data size.
2420 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
2421 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
2423 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
2424 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
2426 2) iASL Compiler/Disassembler and Tools:
2428 Implemented ACPI table revision ID validation in the disassembler. Zero is
2429 always invalid. For DSDTs, the ID controls the interpreter integer width. 1
2430 means 32-bit and this is unusual. 2 or greater is 64-bit.
2432 ----------------------------------------
2433 21 March 2008. Summary of changes for version 20080321:
2435 1) ACPI CA Core Subsystem:
2437 Implemented an additional change to the GPE support in order to suppress
2438 spurious or stray GPEs. The AcpiEvDisableGpe function will now permanently
2439 disable incoming GPEs that are neither enabled nor disabled -- meaning that
2440 the GPE is unknown to the system. This should prevent future interrupt floods
2441 from that GPE. BZ 6217 (Zhang Rui)
2443 Fixed a problem where NULL package elements were not returned to the
2444 AcpiEvaluateObject interface correctly. The element was simply ignored
2445 instead of returning a NULL ACPI_OBJECT package element, potentially causing
2446 a buffer overflow and/or confusing the caller who expected a fixed number of
2447 elements. BZ 10132 (Lin Ming, Bob Moore)
2449 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word, Dword,
2450 Qword), Field, BankField, and IndexField operators when invoked from inside
2451 an executing control method. In this case, these operators created namespace
2452 nodes that were incorrectly left marked as permanent nodes instead of
2453 temporary nodes. This could cause a problem if there is race condition
2454 between an exiting control method and a running namespace walk. (Reported by
2457 Fixed a problem where the CreateField and CreateXXXField operators would
2458 incorrectly allow duplicate names (the name of the field) with no exception
2461 Implemented several changes for Notify handling. Added support for new Notify
2462 values (ACPI 2.0+) and improved the Notify debug output. Notify on
2463 PowerResource objects is no longer allowed, as per the ACPI specification.
2464 (Bob Moore, Zhang Rui)
2466 All Reference Objects returned via the AcpiEvaluateObject interface are now
2467 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved for
2468 NULL objects - either NULL package elements or unresolved named references.
2470 Fixed a problem where an extraneous debug message was produced for package
2471 objects (when debugging enabled). The message "Package List length larger
2472 than NumElements count" is now produced in the correct case, and is now an
2473 error message rather than a debug message. Added a debug message for the
2474 opposite case, where NumElements is larger than the Package List (the package
2475 will be padded out with NULL elements as per the ACPI spec.)
2477 Implemented several improvements for the output of the ASL "Debug" object to
2478 clarify and keep all data for a given object on one output line.
2480 Fixed two size calculation issues with the variable-length Start Dependent
2481 resource descriptor.
2483 Example Code and Data Size: These are the sizes for the OS-independent
2484 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2485 debug version of the code includes the debug output trace mechanism and has
2486 a much larger code and data size.
2489 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
2490 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
2492 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
2493 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
2495 2) iASL Compiler/Disassembler and Tools:
2497 Fixed a problem with the use of the Switch operator where execution of the
2498 containing method by multiple concurrent threads could cause an
2499 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
2500 actual Switch opcode, it must be simulated with local named temporary
2501 variables and if/else pairs. The solution chosen was to mark any method that
2502 uses Switch as Serialized, thus preventing multiple thread entries. BZ 469.
2504 ----------------------------------------
2505 13 February 2008. Summary of changes for version 20080213:
2507 1) ACPI CA Core Subsystem:
2509 Implemented another MS compatibility design change for GPE/Notify handling.
2510 GPEs are now cleared/enabled asynchronously to allow all pending notifies to
2511 complete first. It is expected that the OSL will queue the enable request
2512 behind all pending notify requests (may require changes to the local host OSL
2513 in AcpiOsExecute). Alexey Starikovskiy.
2515 Fixed a problem where buffer and package objects passed as arguments to a
2516 control method via the external AcpiEvaluateObject interface could cause an
2517 AE_AML_INTERNAL exception depending on the order and type of operators
2518 executed by the target control method.
2520 Fixed a problem where resource descriptor size optimization could cause a
2521 problem when a _CRS resource template is passed to a _SRS method. The _SRS
2522 resource template must use the same descriptors (with the same size) as
2523 returned from _CRS. This change affects the following resource descriptors:
2524 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ 9487)
2526 Fixed a problem where a CopyObject to RegionField, BankField, and IndexField
2527 objects did not perform an implicit conversion as it should. These types must
2528 retain their initial type permanently as per the ACPI specification. However,
2529 a CopyObject to all other object types should not perform an implicit
2530 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
2532 Fixed a problem with the AcpiGetDevices interface where the mechanism to
2533 match device CIDs did not examine the entire list of available CIDs, but
2534 instead aborted on the first non-matching CID. Andrew Patterson.
2536 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro was
2537 inadvertently changed to return a 16-bit value instead of a 32-bit value,
2538 truncating the upper dword of a 64-bit value. This macro is only used to
2539 display debug output, so no incorrect calculations were made. Also,
2540 reimplemented the macro so that a 64-bit shift is not performed by
2541 inefficient compilers.
2543 Added missing va_end statements that should correspond with each va_start
2546 Example Code and Data Size: These are the sizes for the OS-independent
2547 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2548 debug version of the code includes the debug output trace mechanism and has
2549 a much larger code and data size.
2552 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
2553 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
2555 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
2556 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
2558 2) iASL Compiler/Disassembler and Tools:
2560 Implemented full disassembler support for the following new ACPI tables:
2561 BERT, EINJ, and ERST. Implemented partial disassembler support for the
2562 complicated HEST table. These tables support the Windows Hardware Error
2563 Architecture (WHEA).
2565 ----------------------------------------
2566 23 January 2008. Summary of changes for version 20080123:
2568 1) ACPI CA Core Subsystem:
2570 Added the 2008 copyright to all module headers and signons. This affects
2571 virtually every file in the ACPICA core subsystem, the iASL compiler, and
2572 the tools/utilities.
2574 Fixed a problem with the SizeOf operator when used with Package and Buffer
2575 objects. These objects have deferred execution for some arguments, and the
2576 execution is now completed before the SizeOf is executed. This problem caused
2577 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore) BZ
2580 Implemented an enhancement to the interpreter "slack mode". In the absence of
2581 an explicit return or an implicitly returned object from the last executed
2582 opcode, a control method will now implicitly return an integer of value 0 for
2583 Microsoft compatibility. (Lin Ming) BZ 392
2585 Fixed a problem with the Load operator where an exception was not returned in
2586 the case where the table is already loaded. (Lin Ming) BZ 463
2588 Implemented support for the use of DDBHandles as an Indexed Reference, as per
2589 the ACPI spec. (Lin Ming) BZ 486
2591 Implemented support for UserTerm (Method invocation) for the Unload operator
2592 as per the ACPI spec. (Lin Ming) BZ 580
2594 Fixed a problem with the LoadTable operator where the OemId and OemTableId
2595 input strings could cause unexpected failures if they were shorter than the
2596 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
2598 Implemented support for UserTerm (Method invocation) for the Unload operator
2599 as per the ACPI spec. (Lin Ming) BZ 580
2601 Implemented header file support for new ACPI tables - BERT, ERST, EINJ, HEST,
2602 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
2604 Example Code and Data Size: These are the sizes for the OS-independent
2605 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2606 debug version of the code includes the debug output trace mechanism and has
2607 a much larger code and data size.
2610 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
2611 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
2613 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
2614 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
2616 2) iASL Compiler/Disassembler and Tools:
2618 Implemented support in the disassembler for checksum validation on incoming
2619 binary DSDTs and SSDTs. If incorrect, a message is displayed within the table
2620 header dump at the start of the disassembly.
2622 Implemented additional debugging information in the namespace listing file
2623 created during compilation. In addition to the namespace hierarchy, the full
2624 pathname to each namespace object is displayed.
2626 Fixed a problem with the disassembler where invalid ACPI tables could cause
2627 faults or infinite loops.
2629 Fixed an unexpected parse error when using the optional "parameter types"
2630 list in a control method declaration. (Lin Ming) BZ 397
2632 Fixed a problem where two External declarations with the same name did not
2633 cause an error (Lin Ming) BZ 509
2635 Implemented support for full TermArgs (adding Argx, Localx and method
2636 invocation) for the ParameterData parameter to the LoadTable operator. (Lin
2639 ----------------------------------------
2640 19 December 2007. Summary of changes for version 20071219:
2642 1) ACPI CA Core Subsystem:
2644 Implemented full support for deferred execution for the TermArg string
2645 arguments for DataTableRegion. This enables forward references and full
2646 operand resolution for the three string arguments. Similar to OperationRegion
2647 deferred argument execution.) Lin Ming. BZ 430
2649 Implemented full argument resolution support for the BankValue argument to
2650 BankField. Previously, only constants were supported, now any TermArg may be
2651 used. Lin Ming BZ 387, 393
2653 Fixed a problem with AcpiGetDevices where the search of a branch of the
2654 device tree could be terminated prematurely. In accordance with the ACPI
2655 specification, the search down the current branch is terminated if a device
2656 is both not present and not functional (instead of just not present.) Yakui
2659 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly if
2660 the underlying AML code changed the GPE enable registers. Now, any unknown
2661 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately disabled
2662 instead of simply ignored. Rui Zhang.
2664 Fixed a problem with Index Fields where the Index register was incorrectly
2665 limited to a maximum of 32 bits. Now any size may be used.
2667 Fixed a couple memory leaks associated with "implicit return" objects when
2668 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
2670 Example Code and Data Size: These are the sizes for the OS-independent
2671 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2672 debug version of the code includes the debug output trace mechanism and has
2673 a much larger code and data size.
2676 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
2677 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
2679 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
2680 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
2682 ----------------------------------------
2683 14 November 2007. Summary of changes for version 20071114:
2685 1) ACPI CA Core Subsystem:
2687 Implemented event counters for each of the Fixed Events, the ACPI SCI
2688 (interrupt) itself, and control methods executed. Named
2689 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively. These
2690 should be useful for debugging and statistics.
2692 Implemented a new external interface, AcpiGetStatistics, to retrieve the
2693 contents of the various event counters. Returns the current values for
2694 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
2695 AcpiMethodCount. The interface can be expanded in the future if new counters
2696 are added. Device drivers should use this interface rather than access the
2699 Fixed a problem with the FromBCD and ToBCD operators. With some compilers,
2700 the ShortDivide function worked incorrectly, causing problems with the BCD
2701 functions with large input values. A truncation from 64-bit to 32-bit
2702 inadvertently occurred. Internal BZ 435. Lin Ming
2704 Fixed a problem with Index references passed as method arguments. References
2705 passed as arguments to control methods were dereferenced immediately (before
2706 control was passed to the called method). The references are now correctly
2707 passed directly to the called method. BZ 5389. Lin Ming
2709 Fixed a problem with CopyObject used in conjunction with the Index operator.
2710 The reference was incorrectly dereferenced before the copy. The reference is
2711 now correctly copied. BZ 5391. Lin Ming
2713 Fixed a problem with Control Method references within Package objects. These
2714 references are now correctly generated. This completes the package
2715 construction overhaul that began in version 20071019.
2717 Example Code and Data Size: These are the sizes for the OS-independent
2718 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2719 debug version of the code includes the debug output trace mechanism and has
2720 a much larger code and data size.
2723 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
2724 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
2726 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
2727 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
2730 2) iASL Compiler/Disassembler and Tools:
2732 The AcpiExec utility now installs handlers for all of the predefined
2733 Operation Region types. New types supported are: PCI_Config, CMOS, and
2736 Fixed a problem with the 64-bit version of AcpiExec where the extended (64-
2737 bit) address fields for the DSDT and FACS within the FADT were not being
2738 used, causing truncation of the upper 32-bits of these addresses. Lin Ming
2741 ----------------------------------------
2742 19 October 2007. Summary of changes for version 20071019:
2744 1) ACPI CA Core Subsystem:
2746 Fixed a problem with the Alias operator when the target of the alias is a
2747 named ASL operator that opens a new scope -- Scope, Device, PowerResource,
2748 Processor, and ThermalZone. In these cases, any children of the original
2749 operator could not be accessed via the alias, potentially causing unexpected
2750 AE_NOT_FOUND exceptions. (BZ 9067)
2752 Fixed a problem with the Package operator where all named references were
2753 created as object references and left otherwise unresolved. According to the
2754 ACPI specification, a Package can only contain Data Objects or references to
2755 control methods. The implication is that named references to Data Objects
2756 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
2757 immediately upon package creation. This is the approach taken with this
2758 change. References to all other named objects (Methods, Devices, Scopes,
2759 etc.) are all now properly created as reference objects. (BZ 5328)
2761 Reverted a change to Notify handling that was introduced in version
2762 20070508. This version changed the Notify handling from asynchronous to
2763 fully synchronous (Device driver Notify handling with respect to the Notify
2764 ASL operator). It was found that this change caused more problems than it
2765 solved and was removed by most users.
2767 Fixed a problem with the Increment and Decrement operators where the type of
2768 the target object could be unexpectedly and incorrectly changed. (BZ 353)
2771 Fixed a problem with the Load and LoadTable operators where the table
2772 location within the namespace was ignored. Instead, the table was always
2773 loaded into the root or current scope. Lin Ming.
2775 Fixed a problem with the Load operator when loading a table from a buffer
2776 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
2778 Fixed a problem with the Debug object where a store of a DdbHandle reference
2779 object to the Debug object could cause a fault.
2781 Added a table checksum verification for the Load operator, in the case where
2782 the load is from a buffer. (BZ 578).
2784 Implemented additional parameter validation for the LoadTable operator. The
2785 length of the input strings SignatureString, OemIdString, and OemTableId are
2786 now checked for maximum lengths. (BZ 582) Lin Ming.
2788 Example Code and Data Size: These are the sizes for the OS-independent
2789 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2790 debug version of the code includes the debug output trace mechanism and has
2791 a much larger code and data size.
2794 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
2795 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
2797 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
2798 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
2801 2) iASL Compiler/Disassembler:
2803 Fixed a problem where if a single file was specified and the file did not
2804 exist, no error message was emitted. (Introduced with wildcard support in
2807 ----------------------------------------
2808 19 September 2007. Summary of changes for version 20070919:
2810 1) ACPI CA Core Subsystem:
2812 Designed and implemented new external interfaces to install and remove
2813 handlers for ACPI table-related events. Current events that are defined are
2814 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
2815 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
2816 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
2818 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
2819 (acpi_serialized option on Linux) could cause some systems to hang during
2820 initialization. (Bob Moore) BZ 8171
2822 Fixed a problem where objects of certain types (Device, ThermalZone,
2823 Processor, PowerResource) can be not found if they are declared and
2824 referenced from within the same control method (Lin Ming) BZ 341
2826 Example Code and Data Size: These are the sizes for the OS-independent
2827 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2828 debug version of the code includes the debug output trace mechanism and has
2829 a much larger code and data size.
2832 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
2833 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
2835 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
2836 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
2839 2) iASL Compiler/Disassembler:
2841 Implemented support to allow multiple files to be compiled/disassembled in a
2842 single invocation. This includes command line wildcard support for both the
2843 Windows and Unix versions of the compiler. This feature simplifies the
2844 disassembly and compilation of multiple ACPI tables in a single directory.
2846 ----------------------------------------
2847 08 May 2007. Summary of changes for version 20070508:
2849 1) ACPI CA Core Subsystem:
2851 Implemented a Microsoft compatibility design change for the handling of the
2852 Notify AML operator. Previously, notify handlers were dispatched and
2853 executed completely asynchronously in a deferred thread. The new design
2854 still executes the notify handlers in a different thread, but the original
2855 thread that executed the Notify() now waits at a synchronization point for
2856 the notify handler to complete. Some machines depend on a synchronous Notify
2857 operator in order to operate correctly.
2859 Implemented support to allow Package objects to be passed as method
2860 arguments to the external AcpiEvaluateObject interface. Previously, this
2861 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
2862 implemented since there were no reserved control methods that required it
2865 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs that
2866 contained invalid non-zero values in reserved fields could cause later
2867 failures because these fields have meaning in later revisions of the FADT.
2868 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The fields
2869 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
2871 Fixed a problem where the Global Lock handle was not properly updated if a
2872 thread that acquired the Global Lock via executing AML code then attempted
2873 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by Joe
2876 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
2877 could be corrupted if the interrupt being removed was at the head of the
2878 list. Reported by Linn Crosetto.
2880 Example Code and Data Size: These are the sizes for the OS-independent
2881 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2882 debug version of the code includes the debug output trace mechanism and has
2883 a much larger code and data size.
2886 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2887 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
2889 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
2890 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
2892 ----------------------------------------
2893 20 March 2007. Summary of changes for version 20070320:
2895 1) ACPI CA Core Subsystem:
2897 Implemented a change to the order of interpretation and evaluation of AML
2898 operand objects within the AML interpreter. The interpreter now evaluates
2899 operands in the order that they appear in the AML stream (and the
2900 corresponding ASL code), instead of in the reverse order (after the entire
2901 operand list has been parsed). The previous behavior caused several subtle
2902 incompatibilities with the Microsoft AML interpreter as well as being
2903 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
2905 Implemented a change to the ACPI Global Lock support. All interfaces to the
2906 global lock now allow the same thread to acquire the lock multiple times.
2907 This affects the AcpiAcquireGlobalLock external interface to the global lock
2908 as well as the internal use of the global lock to support AML fields -- a
2909 control method that is holding the global lock can now simultaneously access
2910 AML fields that require global lock protection. Previously, in both cases,
2911 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change to
2912 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
2913 Controller. There is no change to the behavior of the AML Acquire operator,
2914 as this can already be used to acquire a mutex multiple times by the same
2915 thread. BZ 8066. With assistance from Alexey Starikovskiy.
2917 Fixed a problem where invalid objects could be referenced in the AML
2918 Interpreter after error conditions. During operand evaluation, ensure that
2919 the internal "Return Object" field is cleared on error and only valid
2920 pointers are stored there. Caused occasional access to deleted objects that
2921 resulted in "large reference count" warning messages. Valery Podrezov.
2923 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur on
2924 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
2927 Fixed an internal problem with the handling of result objects on the
2928 interpreter result stack. BZ 7872. Valery Podrezov.
2930 Removed obsolete code that handled the case where AML_NAME_OP is the target
2931 of a reference (Reference.Opcode). This code was no longer necessary. BZ
2932 7874. Valery Podrezov.
2934 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This was a
2935 remnant from the previously discontinued 16-bit support.
2937 Example Code and Data Size: These are the sizes for the OS-independent
2938 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2939 debug version of the code includes the debug output trace mechanism and has
2940 a much larger code and data size.
2943 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2944 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
2946 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2947 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
2949 ----------------------------------------
2950 26 January 2007. Summary of changes for version 20070126:
2952 1) ACPI CA Core Subsystem:
2954 Added the 2007 copyright to all module headers and signons. This affects
2955 virtually every file in the ACPICA core subsystem, the iASL compiler, and
2958 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
2959 during a table load. A bad pointer was passed in the case where the DSDT is
2960 overridden, causing a fault in this case.
2962 Example Code and Data Size: These are the sizes for the OS-independent
2963 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2964 debug version of the code includes the debug output trace mechanism and has
2965 a much larger code and data size.
2968 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2969 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
2971 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2972 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
2974 ----------------------------------------
2975 15 December 2006. Summary of changes for version 20061215:
2977 1) ACPI CA Core Subsystem:
2979 Support for 16-bit ACPICA has been completely removed since it is no longer
2980 necessary and it clutters the code. All 16-bit macros, types, and
2981 conditional compiles have been removed, cleaning up and simplifying the code
2982 across the entire subsystem. DOS support is no longer needed since the
2983 bootable Linux firmware kit is now available.
2985 The handler for the Global Lock is now removed during AcpiTerminate to
2986 enable a clean subsystem restart, via the implementation of the
2987 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
2990 Implemented enhancements to the multithreading support within the debugger
2991 to enable improved multithreading debugging and evaluation of the subsystem.
2994 Debugger: Enhanced the Statistics/Memory command to emit the total (maximum)
2995 memory used during the execution, as well as the maximum memory consumed by
2996 each of the various object types. (Valery Podrezov)
2998 Example Code and Data Size: These are the sizes for the OS-independent
2999 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3000 debug version of the code includes the debug output trace mechanism and has
3001 a much larger code and data size.
3004 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
3005 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
3007 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
3008 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
3011 2) iASL Compiler/Disassembler and Tools:
3013 AcpiExec: Implemented a new option (-m) to display full memory use
3014 statistics upon subsystem/program termination. (Valery Podrezov)
3016 ----------------------------------------
3017 09 November 2006. Summary of changes for version 20061109:
3019 1) ACPI CA Core Subsystem:
3021 Optimized the Load ASL operator in the case where the source operand is an
3022 operation region. Simply map the operation region memory, instead of
3023 performing a bytewise read. (Region must be of type SystemMemory, see
3026 Fixed the Load ASL operator for the case where the source operand is a
3027 region field. A buffer object is also allowed as the source operand. BZ 480
3029 Fixed a problem where the Load ASL operator allowed the source operand to be
3030 an operation region of any type. It is now restricted to regions of type
3031 SystemMemory, as per the ACPI specification. BZ 481
3033 Additional cleanup and optimizations for the new Table Manager code.
3035 AcpiEnable will now fail if all of the required ACPI tables are not loaded
3036 (FADT, FACS, DSDT). BZ 477
3038 Added #pragma pack(8/4) to acobject.h to ensure that the structures in this
3039 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
3040 manually optimized to be aligned and will not work if it is byte-packed.
3042 Example Code and Data Size: These are the sizes for the OS-independent
3043 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3044 debug version of the code includes the debug output trace mechanism and has
3045 a much larger code and data size.
3048 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
3049 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
3051 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
3052 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
3055 2) iASL Compiler/Disassembler and Tools:
3057 Fixed a problem where the presence of the _OSI predefined control method
3058 within complex expressions could cause an internal compiler error.
3060 AcpiExec: Implemented full region support for multiple address spaces.
3061 SpaceId is now part of the REGION object. BZ 429
3063 ----------------------------------------
3064 11 October 2006. Summary of changes for version 20061011:
3066 1) ACPI CA Core Subsystem:
3068 Completed an AML interpreter performance enhancement for control method
3069 execution. Previously a 2-pass parse/execution, control methods are now
3070 completely parsed and executed in a single pass. This improves overall
3071 interpreter performance by ~25%, reduces code size, and reduces CPU stack
3072 use. (Valery Podrezov + interpreter changes in version 20051202 that
3073 eliminated namespace loading during the pass one parse.)
3075 Implemented _CID support for PCI Root Bridge detection. If the _HID does not
3076 match the predefined PCI Root Bridge IDs, the _CID list (if present) is now
3077 obtained and also checked for an ID match.
3079 Implemented additional support for the PCI _ADR execution: upsearch until a
3080 device scope is found before executing _ADR. This allows PCI_Config
3081 operation regions to be declared locally within control methods underneath
3084 Fixed a problem with a possible race condition between threads executing
3085 AcpiWalkNamespace and the AML interpreter. This condition was removed by
3086 modifying AcpiWalkNamespace to (by default) ignore all temporary namespace
3087 entries created during any concurrent control method execution. An
3088 additional namespace race condition is known to exist between
3089 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
3092 Restructured the AML ParseLoop function, breaking it into several
3093 subfunctions in order to reduce CPU stack use and improve maintainability.
3096 AcpiGetHandle: Fix for parameter validation to detect invalid combinations
3097 of prefix handle and pathname. BZ 478
3099 Example Code and Data Size: These are the sizes for the OS-independent
3100 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3101 debug version of the code includes the debug output trace mechanism and has
3102 a much larger code and data size.
3105 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
3106 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
3108 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
3109 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
3111 2) iASL Compiler/Disassembler and Tools:
3113 Ported the -g option (get local ACPI tables) to the new ACPICA Table Manager
3114 to restore original behavior.
3116 ----------------------------------------
3117 27 September 2006. Summary of changes for version 20060927:
3119 1) ACPI CA Core Subsystem:
3121 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
3122 These functions now use a spinlock for mutual exclusion and the interrupt
3123 level indication flag is not needed.
3125 Fixed a problem with the Global Lock where the lock could appear to be
3126 obtained before it is actually obtained. The global lock semaphore was
3127 inadvertently created with one unit instead of zero units. (BZ 464) Fiodor
3130 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue during
3131 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
3133 Example Code and Data Size: These are the sizes for the OS-independent
3134 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3135 debug version of the code includes the debug output trace mechanism and has
3136 a much larger code and data size.
3139 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
3140 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
3142 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
3143 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
3146 2) iASL Compiler/Disassembler and Tools:
3148 Fixed a compilation problem with the pre-defined Resource Descriptor field
3149 names where an "object does not exist" error could be incorrectly generated
3150 if the parent ResourceTemplate pathname places the template within a
3151 different namespace scope than the current scope. (BZ 7212)
3153 Fixed a problem where the compiler could hang after syntax errors detected
3154 in an ElseIf construct. (BZ 453)
3156 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
3157 operator. An incorrect output filename was produced when this parameter was
3158 a null string (""). Now, the original input filename is used as the AML
3159 output filename, with an ".aml" extension.
3161 Implemented a generic batch command mode for the AcpiExec utility (execute
3162 any AML debugger command) (Valery Podrezov).
3164 ----------------------------------------
3165 12 September 2006. Summary of changes for version 20060912:
3167 1) ACPI CA Core Subsystem:
3169 Enhanced the implementation of the "serialized mode" of the interpreter
3170 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
3171 specified, instead of creating a serialization semaphore per control method,
3172 the interpreter lock is simply no longer released before a blocking
3173 operation during control method execution. This effectively makes the AML
3174 Interpreter single-threaded. The overhead of a semaphore per-method is
3177 Fixed a regression where an error was no longer emitted if a control method
3178 attempts to create 2 objects of the same name. This once again returns
3179 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism that
3180 will dynamically serialize the control method to possible prevent future
3183 Integrated a fix for a problem with PCI Express HID detection in the PCI
3184 Config Space setup procedure. (BZ 7145)
3186 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
3187 AcpiHwInitialize function - the FADT registers are now validated when the
3190 Added two new warnings during FADT verification - 1) if the FADT is larger
3191 than the largest known FADT version, and 2) if there is a mismatch between a
3192 32-bit block address and the 64-bit X counterpart (when both are non-zero.)
3194 Example Code and Data Size: These are the sizes for the OS-independent
3195 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3196 debug version of the code includes the debug output trace mechanism and has
3197 a much larger code and data size.
3200 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
3201 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
3203 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
3204 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
3207 2) iASL Compiler/Disassembler and Tools:
3209 Fixed a problem with the implementation of the Switch() operator where the
3210 temporary variable was declared too close to the actual Switch, instead of
3211 at method level. This could cause a problem if the Switch() operator is
3212 within a while loop, causing an error on the second iteration. (BZ 460)
3214 Disassembler - fix for error emitted for unknown type for target of scope
3215 operator. Now, ignore it and continue.
3217 Disassembly of an FADT now verifies the input FADT and reports any errors
3218 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
3220 Disassembly of raw data buffers with byte initialization data now prefixes
3221 each output line with the current buffer offset.
3223 Disassembly of ASF! table now includes all variable-length data fields at
3224 the end of some of the subtables.
3226 The disassembler now emits a comment if a buffer appears to be a
3227 ResourceTemplate, but cannot be disassembled as such because the EndTag does
3228 not appear at the very end of the buffer.
3230 AcpiExec - Added the "-t" command line option to enable the serialized mode
3231 of the AML interpreter.
3233 ----------------------------------------
3234 31 August 2006. Summary of changes for version 20060831:
3236 1) ACPI CA Core Subsystem:
3238 Miscellaneous fixes for the Table Manager:
3239 - Correctly initialize internal common FADT for all 64-bit "X" fields
3240 - Fixed a couple table mapping issues during table load
3241 - Fixed a couple alignment issues for IA64
3242 - Initialize input array to zero in AcpiInitializeTables
3243 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
3246 Change for GPE support: when a "wake" GPE is received, all wake GPEs are now
3247 immediately disabled to prevent the waking GPE from firing again and to
3248 prevent other wake GPEs from interrupting the wake process.
3250 Added the AcpiGpeCount global that tracks the number of processed GPEs, to
3251 be used for debugging systems with a large number of ACPI interrupts.
3253 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
3254 both the ACPICA headers and the disassembler.
3256 Example Code and Data Size: These are the sizes for the OS-independent
3257 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3258 debug version of the code includes the debug output trace mechanism and has
3259 a much larger code and data size.
3262 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
3263 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
3265 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
3266 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
3269 2) iASL Compiler/Disassembler and Tools:
3271 Disassembler support for the DMAR ACPI table.
3273 ----------------------------------------
3274 23 August 2006. Summary of changes for version 20060823:
3276 1) ACPI CA Core Subsystem:
3278 The Table Manager component has been completely redesigned and
3279 reimplemented. The new design is much simpler, and reduces the overall code
3280 and data size of the kernel-resident ACPICA by approximately 5%. Also, it is
3281 now possible to obtain the ACPI tables very early during kernel
3282 initialization, even before dynamic memory management is initialized.
3283 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
3285 Obsolete ACPICA interfaces:
3287 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel init
3289 - AcpiLoadTable: Not needed.
3290 - AcpiUnloadTable: Not needed.
3292 New ACPICA interfaces:
3294 - AcpiInitializeTables: Must be called before the table manager can be used.
3295 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
3296 allocated memory after it becomes available.
3297 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI tables
3300 Other ACPICA changes:
3302 - AcpiGetTableHeader returns the actual mapped table header, not a copy. Use
3303 AcpiOsUnmapMemory to free this mapping.
3304 - AcpiGetTable returns the actual mapped table. The mapping is managed
3305 internally and must not be deleted by the caller. Use of this interface
3306 causes no additional dynamic memory allocation.
3307 - AcpiFindRootPointer: Support for physical addressing has been eliminated,
3308 it appeared to be unused.
3309 - The interface to AcpiOsMapMemory has changed to be consistent with the
3310 other allocation interfaces.
3311 - The interface to AcpiOsGetRootPointer has changed to eliminate unnecessary
3313 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on 64-
3314 bit platforms. Was previously 64 bits on all platforms.
3315 - The interface to the ACPI Global Lock acquire/release macros have changed
3316 slightly since ACPICA no longer keeps a local copy of the FACS with a
3317 constructed pointer to the actual global lock.
3319 Porting to the new table manager:
3321 - AcpiInitializeTables: Must be called once, and can be called anytime
3322 during the OS initialization process. It allows the host to specify an area
3323 of memory to be used to store the internal version of the RSDT/XSDT (root
3324 table). This allows the host to access ACPI tables before memory management
3325 is initialized and running.
3326 - AcpiReallocateRootTable: Can be called after memory management is running
3327 to copy the root table to a dynamically allocated array, freeing up the
3328 scratch memory specified in the call to AcpiInitializeTables.
3329 - AcpiSubsystemInitialize: This existing interface is independent of the
3330 Table Manager, and does not have to be called before the Table Manager can
3331 be used, it only must be called before the rest of ACPICA can be used.
3332 - ACPI Tables: Some changes have been made to the names and structure of the
3333 actbl.h and actbl1.h header files and may require changes to existing code.
3334 For example, bitfields have been completely removed because of their lack of
3335 portability across C compilers.
3336 - Update interfaces to the Global Lock acquire/release macros if local
3337 versions are used. (see acwin.h)
3339 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
3343 Example Code and Data Size: These are the sizes for the OS-independent
3344 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3345 debug version of the code includes the debug output trace mechanism and has
3346 a much larger code and data size.
3349 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
3350 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
3352 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
3353 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
3356 2) iASL Compiler/Disassembler and Tools:
3358 No changes for this release.
3360 ----------------------------------------
3361 21 July 2006. Summary of changes for version 20060721:
3363 1) ACPI CA Core Subsystem:
3365 The full source code for the ASL test suite used to validate the iASL
3366 compiler and the ACPICA core subsystem is being released with the ACPICA
3367 source for the first time. The source is contained in a separate package and
3368 consists of over 1100 files that exercise all ASL/AML operators. The package
3369 should appear on the Intel/ACPI web site shortly. (Valery Podrezov, Fiodor
3372 Completed a new design and implementation for support of the ACPI Global
3373 Lock. On the OS side, the global lock is now treated as a standard AML
3374 mutex. Previously, multiple OS threads could "acquire" the global lock
3375 simultaneously. However, this could cause the BIOS to be starved out of the
3376 lock - especially in cases such as the Embedded Controller driver where
3377 there is a tight coupling between the OS and the BIOS.
3379 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
3380 The Global Lock interrupt handler no longer queues the execution of a
3381 separate thread to signal the global lock semaphore. Instead, the semaphore
3382 is signaled directly from the interrupt handler.
3384 Implemented support within the AML interpreter for package objects that
3385 contain a larger AML length (package list length) than the package element
3386 count. In this case, the length of the package is truncated to match the
3387 package element count. Some BIOS code apparently modifies the package length
3388 on the fly, and this change supports this behavior. Provides compatibility
3389 with the MS AML interpreter. (With assistance from Fiodor Suietov)
3391 Implemented a temporary fix for the BankValue parameter of a Bank Field to
3392 support all constant values, now including the Zero and One opcodes.
3393 Evaluation of this parameter must eventually be converted to a full TermArg
3394 evaluation. A not-implemented error is now returned (temporarily) for non-
3395 constant values for this parameter.
3397 Fixed problem reports (Fiodor Suietov) integrated:
3398 - Fix for premature object deletion after CopyObject on Operation Region (BZ
3401 Example Code and Data Size: These are the sizes for the OS-independent
3402 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3403 debug version of the code includes the debug output trace mechanism and has
3404 a much larger code and data size.
3407 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
3408 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
3410 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
3411 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
3414 2) iASL Compiler/Disassembler and Tools:
3416 No changes for this release.
3418 ----------------------------------------
3419 07 July 2006. Summary of changes for version 20060707:
3421 1) ACPI CA Core Subsystem:
3423 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
3424 that do not allow the initialization of address pointers within packed
3425 structures - even though the hardware itself may support misaligned
3426 transfers. Some of the debug data structures are packed by default to
3429 Added an error message for the case where AcpiOsGetThreadId() returns zero.
3430 A non-zero value is required by the core ACPICA code to ensure the proper
3431 operation of AML mutexes and recursive control methods.
3433 The DSDT is now the only ACPI table that determines whether the AML
3434 interpreter is in 32-bit or 64-bit mode. Not really a functional change, but
3435 the hooks for per-table 32/64 switching have been removed from the code. A
3436 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
3438 Fixed a possible leak of an OwnerID in the error path of
3439 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
3440 deletion to a single place in AcpiTbUninstallTable to correct possible leaks
3441 when using the AcpiTbDeleteTablesByType interface (with assistance from
3444 Fixed a problem with Serialized control methods where the semaphore
3445 associated with the method could be over-signaled after multiple method
3448 Fixed two issues with the locking of the internal namespace data structure.
3449 Both the Unload() operator and AcpiUnloadTable interface now lock the
3450 namespace during the namespace deletion associated with the table unload
3451 (with assistance from Linn Crosetto.)
3453 Fixed problem reports (Valery Podrezov) integrated:
3454 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
3456 Fixed problem reports (Fiodor Suietov) integrated:
3457 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
3458 - On Address Space handler deletion, needless deactivation call (BZ 374)
3459 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375)
3460 - Possible memory leak, Notify sub-objects of Processor, Power, ThermalZone
3462 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
3463 - Minimum Length of RSDT should be validated (BZ 379)
3464 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
3466 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type loaded
3469 Example Code and Data Size: These are the sizes for the OS-independent
3470 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3471 debug version of the code includes the debug output trace mechanism and has
3472 a much larger code and data size.
3475 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
3476 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
3478 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
3479 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
3482 2) iASL Compiler/Disassembler and Tools:
3484 Fixed problem reports:
3485 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
3488 ----------------------------------------
3489 23 June 2006. Summary of changes for version 20060623:
3491 1) ACPI CA Core Subsystem:
3493 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
3494 allows the type to be customized to the host OS for improved efficiency
3495 (since a spinlock is usually a very small object.)
3497 Implemented support for "ignored" bits in the ACPI registers. According to
3498 the ACPI specification, these bits should be preserved when writing the
3499 registers via a read/modify/write cycle. There are 3 bits preserved in this
3500 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
3502 Implemented the initial deployment of new OSL mutex interfaces. Since some
3503 host operating systems have separate mutex and semaphore objects, this
3504 feature was requested. The base code now uses mutexes (and the new mutex
3505 interfaces) wherever a binary semaphore was used previously. However, for
3506 the current release, the mutex interfaces are defined as macros to map them
3507 to the existing semaphore interfaces. Therefore, no OSL changes are required
3508 at this time. (See acpiosxf.h)
3510 Fixed several problems with the support for the control method SyncLevel
3511 parameter. The SyncLevel now works according to the ACPI specification and
3512 in concert with the Mutex SyncLevel parameter, since the current SyncLevel
3513 is a property of the executing thread. Mutual exclusion for control methods
3514 is now implemented with a mutex instead of a semaphore.
3516 Fixed three instances of the use of the C shift operator in the bitfield
3517 support code (exfldio.c) to avoid the use of a shift value larger than the
3518 target data width. The behavior of C compilers is undefined in this case and
3519 can cause unpredictable results, and therefore the case must be detected and
3520 avoided. (Fiodor Suietov)
3522 Added an info message whenever an SSDT or OEM table is loaded dynamically
3523 via the Load() or LoadTable() ASL operators. This should improve debugging
3524 capability since it will show exactly what tables have been loaded (beyond
3525 the tables present in the RSDT/XSDT.)
3527 Example Code and Data Size: These are the sizes for the OS-independent
3528 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3529 debug version of the code includes the debug output trace mechanism and has
3530 a much larger code and data size.
3533 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
3534 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
3536 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
3537 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
3540 2) iASL Compiler/Disassembler and Tools:
3542 No changes for this release.
3544 ----------------------------------------
3545 08 June 2006. Summary of changes for version 20060608:
3547 1) ACPI CA Core Subsystem:
3549 Converted the locking mutex used for the ACPI hardware to a spinlock. This
3550 change should eliminate all problems caused by attempting to acquire a
3551 semaphore at interrupt level, and it means that all ACPICA external
3552 interfaces that directly access the ACPI hardware can be safely called from
3553 interrupt level. OSL code that implements the semaphore interfaces should be
3554 able to eliminate any workarounds for being called at interrupt level.
3556 Fixed a regression introduced in 20060526 where the ACPI device
3557 initialization could be prematurely aborted with an AE_NOT_FOUND if a device
3558 did not have an optional _INI method.
3560 Fixed an IndexField issue where a write to the Data Register should be
3561 limited in size to the AccessSize (width) of the IndexField itself. (BZ 433,
3564 Fixed problem reports (Valery Podrezov) integrated:
3565 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
3567 Fixed problem reports (Fiodor Suietov) integrated:
3568 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
3570 Removed four global mutexes that were obsolete and were no longer being
3573 Example Code and Data Size: These are the sizes for the OS-independent
3574 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3575 debug version of the code includes the debug output trace mechanism and has
3576 a much larger code and data size.
3579 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
3580 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
3582 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
3583 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
3586 2) iASL Compiler/Disassembler and Tools:
3588 Fixed a fault when using -g option (get tables from registry) on Windows
3591 Fixed problem reports integrated:
3592 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
3593 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
3595 - Global table revision override (-r) is ignored (BZ 413)
3597 ----------------------------------------
3598 26 May 2006. Summary of changes for version 20060526:
3600 1) ACPI CA Core Subsystem:
3602 Restructured, flattened, and simplified the internal interfaces for
3603 namespace object evaluation - resulting in smaller code, less CPU stack use,
3604 and fewer interfaces. (With assistance from Mikhail Kouzmich)
3606 Fixed a problem with the CopyObject operator where the first parameter was
3607 not typed correctly for the parser, interpreter, compiler, and disassembler.
3608 Caused various errors and unexpected behavior.
3610 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
3611 produced incorrect results with some C compilers. Since the behavior of C
3612 compilers when the shift value is larger than the datatype width is
3613 apparently not well defined, the interpreter now detects this condition and
3614 simply returns zero as expected in all such cases. (BZ 395)
3616 Fixed problem reports (Valery Podrezov) integrated:
3617 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
3618 - Allow interpreter to handle nested method declarations (BZ 5361)
3620 Fixed problem reports (Fiodor Suietov) integrated:
3621 - AcpiTerminate doesn't free debug memory allocation list objects (BZ 355)
3622 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ 356)
3623 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
3624 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
3625 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
3626 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
3627 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
3628 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
3629 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ 365)
3630 - Status of the Global Initialization Handler call not used (BZ 366)
3631 - Incorrect object parameter to Global Initialization Handler (BZ 367)
3633 Example Code and Data Size: These are the sizes for the OS-independent
3634 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3635 debug version of the code includes the debug output trace mechanism and has
3636 a much larger code and data size.
3639 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
3640 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
3642 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
3643 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
3646 2) iASL Compiler/Disassembler and Tools:
3648 Modified the parser to allow the names IO, DMA, and IRQ to be used as
3649 namespace identifiers with no collision with existing resource descriptor
3650 macro names. This provides compatibility with other ASL compilers and is
3651 most useful for disassembly/recompilation of existing tables without parse
3652 errors. (With assistance from Thomas Renninger)
3654 Disassembler: fixed an incorrect disassembly problem with the
3655 DataTableRegion and CopyObject operators. Fixed a possible fault during
3656 disassembly of some Alias operators.
3658 ----------------------------------------
3659 12 May 2006. Summary of changes for version 20060512:
3661 1) ACPI CA Core Subsystem:
3663 Replaced the AcpiOsQueueForExecution interface with a new interface named
3664 AcpiOsExecute. The major difference is that the new interface does not have
3665 a Priority parameter, this appeared to be useless and has been replaced by a
3666 Type parameter. The Type tells the host what type of execution is being
3667 requested, such as global lock handler, notify handler, GPE handler, etc.
3668 This allows the host to queue and execute the request as appropriate for the
3669 request type, possibly using different work queues and different priorities
3670 for the various request types. This enables fixes for multithreading
3671 deadlock problems such as BZ #5534, and will require changes to all existing
3672 OS interface layers. (Alexey Starikovskiy and Bob Moore)
3674 Fixed a possible memory leak associated with the support for the so-called
3675 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
3678 Fixed a problem with the Load() operator where a table load from an
3679 operation region could overwrite an internal table buffer by up to 7 bytes
3680 and cause alignment faults on IPF systems. (With assistance from Luming Yu)
3682 Example Code and Data Size: These are the sizes for the OS-independent
3683 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3684 debug version of the code includes the debug output trace mechanism and has
3685 a much larger code and data size.
3688 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
3689 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
3691 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
3692 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
3696 2) iASL Compiler/Disassembler and Tools:
3698 Disassembler: Implemented support to cross reference the internal namespace
3699 and automatically generate ASL External() statements for symbols not defined
3700 within the current table being disassembled. This will simplify the
3701 disassembly and recompilation of interdependent tables such as SSDTs since
3702 these statements will no longer have to be added manually.
3704 Disassembler: Implemented experimental support to automatically detect
3705 invocations of external control methods and generate appropriate External()
3706 statements. This is problematic because the AML cannot be correctly parsed
3707 until the number of arguments for each control method is known. Currently,
3708 standalone method invocations and invocations as the source operand of a
3709 Store() statement are supported.
3711 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
3712 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
3713 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
3714 more readable and likely closer to the original ASL source.
3716 ----------------------------------------
3717 21 April 2006. Summary of changes for version 20060421:
3719 1) ACPI CA Core Subsystem:
3721 Removed a device initialization optimization introduced in 20051216 where
3722 the _STA method was not run unless an _INI was also present for the same
3723 device. This optimization could cause problems because it could allow _INI
3724 methods to be run within a not-present device subtree. (If a not-present
3725 device had no _INI, _STA would not be run, the not-present status would not
3726 be discovered, and the children of the device would be incorrectly
3729 Implemented a new _STA optimization where namespace subtrees that do not
3730 contain _INI are identified and ignored during device initialization.
3731 Selectively running _STA can significantly improve boot time on large
3732 machines (with assistance from Len Brown.)
3734 Implemented support for the device initialization case where the returned
3735 _STA flags indicate a device not-present but functioning. In this case, _INI
3736 is not run, but the device children are examined for presence, as per the
3739 Implemented an additional change to the IndexField support in order to
3740 conform to MS behavior. The value written to the Index Register is not
3741 simply a byte offset, it is a byte offset in units of the access width of
3742 the parent Index Field. (Fiodor Suietov)
3744 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
3745 interface is called during the creation of all AML operation regions, and
3746 allows the host OS to exert control over what addresses it will allow the
3747 AML code to access. Operation Regions whose addresses are disallowed will
3748 cause a runtime exception when they are actually accessed (will not affect
3749 or abort table loading.) See oswinxf or osunixxf for an example
3752 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
3753 interface allows the host OS to match the various "optional"
3754 interface/behavior strings for the _OSI predefined control method as
3755 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
3756 for an example implementation.
3758 Restructured and corrected various problems in the exception handling code
3759 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
3760 (with assistance from Takayoshi Kochi.)
3762 Modified the Linux source converter to ignore quoted string literals while
3763 converting identifiers from mixed to lower case. This will correct problems
3764 with the disassembler and other areas where such strings must not be
3767 The ACPI_FUNCTION_* macros no longer require quotes around the function
3768 name. This allows the Linux source converter to convert the names, now that
3769 the converter ignores quoted strings.
3771 Example Code and Data Size: These are the sizes for the OS-independent
3772 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3773 debug version of the code includes the debug output trace mechanism and has
3774 a much larger code and data size.
3778 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
3779 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
3781 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
3782 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
3785 2) iASL Compiler/Disassembler and Tools:
3787 Implemented 3 new warnings for iASL, and implemented multiple warning levels
3790 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is not
3791 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
3792 check for the possible timeout, a warning is issued.
3794 2) Useless operators: If an ASL operator does not specify an optional target
3795 operand and it also does not use the function return value from the
3796 operator, a warning is issued since the operator effectively does nothing.
3798 3) Unreferenced objects: If a namespace object is created, but never
3799 referenced, a warning is issued. This is a warning level 2 since there are
3800 cases where this is ok, such as when a secondary table is loaded that uses
3801 the unreferenced objects. Even so, care is taken to only flag objects that
3802 don't look like they will ever be used. For example, the reserved methods
3803 (starting with an underscore) are usually not referenced because it is
3804 expected that the OS will invoke them.
3806 ----------------------------------------
3807 31 March 2006. Summary of changes for version 20060331:
3809 1) ACPI CA Core Subsystem:
3811 Implemented header file support for the following additional ACPI tables:
3812 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this support,
3813 all current and known ACPI tables are now defined in the ACPICA headers and
3814 are available for use by device drivers and other software.
3816 Implemented support to allow tables that contain ACPI names with invalid
3817 characters to be loaded. Previously, this would cause the table load to
3818 fail, but since there are several known cases of such tables on existing
3819 machines, this change was made to enable ACPI support for them. Also, this
3820 matches the behavior of the Microsoft ACPI implementation.
3822 Fixed a couple regressions introduced during the memory optimization in the
3823 20060317 release. The namespace node definition required additional
3824 reorganization and an internal datatype that had been changed to 8-bit was
3825 restored to 32-bit. (Valery Podrezov)
3827 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
3828 could be passed through to AcpiOsReleaseObject which is unexpected. Such
3829 null pointers are now trapped and ignored, matching the behavior of the
3830 previous implementation before the deployment of AcpiOsReleaseObject.
3831 (Valery Podrezov, Fiodor Suietov)
3833 Fixed a memory mapping leak during the deletion of a SystemMemory operation
3834 region where a cached memory mapping was not deleted. This became a
3835 noticeable problem for operation regions that are defined within frequently
3836 used control methods. (Dana Meyers)
3838 Reorganized the ACPI table header files into two main files: one for the
3839 ACPI tables consumed by the ACPICA core, and another for the miscellaneous
3840 ACPI tables that are consumed by the drivers and other software. The various
3841 FADT definitions were merged into one common section and three different
3842 tables (ACPI 1.0, 1.0+, and 2.0)
3844 Example Code and Data Size: These are the sizes for the OS-independent
3845 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3846 debug version of the code includes the debug output trace mechanism and has
3847 a much larger code and data size.
3850 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
3851 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
3853 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
3854 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
3857 2) iASL Compiler/Disassembler and Tools:
3859 Disassembler: Implemented support to decode and format all non-AML ACPI
3860 tables (tables other than DSDTs and SSDTs.) This includes the new tables
3861 added to the ACPICA headers, therefore all current and known ACPI tables are
3864 Disassembler: The change to allow ACPI names with invalid characters also
3865 enables the disassembly of such tables. Invalid characters within names are
3866 changed to '*' to make the name printable; the iASL compiler will still
3867 generate an error for such names, however, since this is an invalid ACPI
3870 Implemented an option for AcpiXtract (-a) to extract all tables found in the
3871 input file. The default invocation extracts only the DSDTs and SSDTs.
3873 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
3874 makefile for the AcpiXtract utility.
3876 ----------------------------------------
3877 17 March 2006. Summary of changes for version 20060317:
3879 1) ACPI CA Core Subsystem:
3881 Implemented the use of a cache object for all internal namespace nodes.
3882 Since there are about 1000 static nodes in a typical system, this will
3883 decrease memory use for cache implementations that minimize per-allocation
3884 overhead (such as a slab allocator.)
3886 Removed the reference count mechanism for internal namespace nodes, since it
3887 was deemed unnecessary. This reduces the size of each namespace node by
3888 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit case,
3889 and 32 bytes for the 64-bit case.
3891 Optimized several internal data structures to reduce object size on 64-bit
3892 platforms by packing data within the 64-bit alignment. This includes the
3893 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
3894 instances corresponding to the namespace objects.
3896 Added two new strings for the predefined _OSI method: "Windows 2001.1 SP1"
3899 Split the allocation tracking mechanism out to a separate file, from
3900 utalloc.c to uttrack.c. This mechanism appears to be only useful for
3901 application-level code. Kernels may wish to not include uttrack.c in
3904 Removed all remnants of the obsolete ACPI_REPORT_* macros and the associated
3905 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
3908 Code and Data Size: These are the sizes for the acpica.lib produced by the
3909 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
3910 driver or OSPM code. The debug version of the code includes the debug output
3911 trace mechanism and has a much larger code and data size. Note that these
3912 values will vary depending on the efficiency of the compiler and the
3913 compiler options used during generation.
3916 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3917 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
3919 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
3920 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
3923 2) iASL Compiler/Disassembler and Tools:
3925 Implemented an ANSI C version of the acpixtract utility. This version will
3926 automatically extract the DSDT and all SSDTs from the input acpidump text
3927 file and dump the binary output to separate files. It can also display a
3928 summary of the input file including the headers for each table found and
3929 will extract any single ACPI table, with any signature. (See
3930 source/tools/acpixtract)
3932 ----------------------------------------
3933 10 March 2006. Summary of changes for version 20060310:
3935 1) ACPI CA Core Subsystem:
3937 Tagged all external interfaces to the subsystem with the new
3938 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to assist
3939 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
3940 macro. The default definition is NULL.
3942 Added the ACPI_THREAD_ID type for the return value from AcpiOsGetThreadId.
3943 This allows the host to define this as necessary to simplify kernel
3944 integration. The default definition is ACPI_NATIVE_UINT.
3946 Fixed two interpreter problems related to error processing, the deletion of
3947 objects, and placing invalid pointers onto the internal operator result
3948 stack. BZ 6028, 6151 (Valery Podrezov)
3950 Increased the reference count threshold where a warning is emitted for large
3951 reference counts in order to eliminate unnecessary warnings on systems with
3952 large namespaces (especially 64-bit.) Increased the value from 0x400 to
3955 Due to universal disagreement as to the meaning of the 'c' in the calloc()
3956 function, the ACPI_MEM_CALLOCATE macro has been renamed to
3957 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
3958 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
3961 Code and Data Size: These are the sizes for the acpica.lib produced by the
3962 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
3963 driver or OSPM code. The debug version of the code includes the debug output
3964 trace mechanism and has a much larger code and data size. Note that these
3965 values will vary depending on the efficiency of the compiler and the
3966 compiler options used during generation.
3969 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
3970 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
3972 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3973 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
3976 2) iASL Compiler/Disassembler:
3978 Disassembler: implemented support for symbolic resource descriptor
3979 references. If a CreateXxxxField operator references a fixed offset within a
3980 resource descriptor, a name is assigned to the descriptor and the offset is
3981 translated to the appropriate resource tag and pathname. The addition of
3982 this support brings the disassembled code very close to the original ASL
3983 source code and helps eliminate run-time errors when the disassembled code
3984 is modified (and recompiled) in such a way as to invalidate the original
3987 Implemented support for a Descriptor Name as the last parameter to the ASL
3988 Register() macro. This parameter was inadvertently left out of the ACPI
3989 specification, and will be added for ACPI 3.0b.
3991 Fixed a problem where the use of the "_OSI" string (versus the full path
3992 "\_OSI") caused an internal compiler error. ("No back ptr to op")
3994 Fixed a problem with the error message that occurs when an invalid string is
3995 used for a _HID object (such as one with an embedded asterisk: "*PNP010A".)
3996 The correct message is now displayed.
3998 ----------------------------------------
3999 17 February 2006. Summary of changes for version 20060217:
4001 1) ACPI CA Core Subsystem:
4003 Implemented a change to the IndexField support to match the behavior of the
4004 Microsoft AML interpreter. The value written to the Index register is now a
4005 byte offset, no longer an index based upon the width of the Data register.
4006 This should fix IndexField problems seen on some machines where the Data
4007 register is not exactly one byte wide. The ACPI specification will be
4008 clarified on this point.
4010 Fixed a problem where several resource descriptor types could overrun the
4011 internal descriptor buffer due to size miscalculation: VendorShort,
4012 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
4013 affect all platforms.
4015 Fixed a problem where individual resource descriptors were misaligned within
4016 the internal buffer, causing alignment faults on IA64 platforms.
4018 Code and Data Size: These are the sizes for the acpica.lib produced by the
4019 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
4020 driver or OSPM code. The debug version of the code includes the debug output
4021 trace mechanism and has a much larger code and data size. Note that these
4022 values will vary depending on the efficiency of the compiler and the
4023 compiler options used during generation.
4026 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
4027 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
4029 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
4030 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
4033 2) iASL Compiler/Disassembler:
4035 Implemented support for new reserved names: _WDG and _WED are Microsoft
4036 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
4037 defined method (Throttling Depth Limit.)
4039 Fixed a problem where a zero-length VendorShort or VendorLong resource
4040 descriptor was incorrectly emitted as a descriptor of length one.
4042 ----------------------------------------
4043 10 February 2006. Summary of changes for version 20060210:
4045 1) ACPI CA Core Subsystem:
4047 Removed a couple of extraneous ACPI_ERROR messages that appeared during
4048 normal execution. These became apparent after the conversion from
4051 Fixed a problem where the CreateField operator could hang if the BitIndex or
4052 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
4054 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
4055 failed with an exception. This also fixes a couple of related RefOf and
4056 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
4058 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead of
4059 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov, BZ
4062 Implemented a memory cleanup at the end of the execution of each iteration
4063 of an AML While() loop, preventing the accumulation of outstanding objects.
4064 (Valery Podrezov, BZ 5427)
4066 Eliminated a chunk of duplicate code in the object resolution code. (Valery
4069 Fixed several warnings during the 64-bit code generation.
4071 The AcpiSrc source code conversion tool now inserts one line of whitespace
4072 after an if() statement that is followed immediately by a comment, improving
4073 readability of the Linux code.
4075 Code and Data Size: The current and previous library sizes for the core
4076 subsystem are shown below. These are the code and data sizes for the
4077 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4078 values do not include any ACPI driver or OSPM code. The debug version of the
4079 code includes the debug output trace mechanism and has a much larger code
4080 and data size. Note that these values will vary depending on the efficiency
4081 of the compiler and the compiler options used during generation.
4084 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
4085 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
4087 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
4088 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
4091 2) iASL Compiler/Disassembler:
4093 Fixed a problem with the disassembly of a BankField operator with a complex
4094 expression for the BankValue parameter.
4096 ----------------------------------------
4097 27 January 2006. Summary of changes for version 20060127:
4099 1) ACPI CA Core Subsystem:
4101 Implemented support in the Resource Manager to allow unresolved namestring
4102 references within resource package objects for the _PRT method. This support
4103 is in addition to the previously implemented unresolved reference support
4104 within the AML parser. If the interpreter slack mode is enabled, these
4105 unresolved references will be passed through to the caller as a NULL package
4108 Implemented and deployed new macros and functions for error and warning
4109 messages across the subsystem. These macros are simpler and generate less
4110 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
4111 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
4112 macros remain defined to allow ACPI drivers time to migrate to the new
4115 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of the
4116 Acquire/Release Lock OSL interfaces.
4118 Fixed a problem where Alias ASL operators are sometimes not correctly
4119 resolved, in both the interpreter and the iASL compiler.
4121 Fixed several problems with the implementation of the ConcatenateResTemplate
4122 ASL operator. As per the ACPI specification, zero length buffers are now
4123 treated as a single EndTag. One-length buffers always cause a fatal
4124 exception. Non-zero length buffers that do not end with a full 2-byte EndTag
4125 cause a fatal exception.
4127 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
4128 interface. (With assistance from Thomas Renninger)
4130 Code and Data Size: The current and previous library sizes for the core
4131 subsystem are shown below. These are the code and data sizes for the
4132 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4133 values do not include any ACPI driver or OSPM code. The debug version of the
4134 code includes the debug output trace mechanism and has a much larger code
4135 and data size. Note that these values will vary depending on the efficiency
4136 of the compiler and the compiler options used during generation.
4139 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
4140 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
4142 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
4143 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
4146 2) iASL Compiler/Disassembler:
4148 Fixed an internal error that was generated for any forward references to ASL
4151 ----------------------------------------
4152 13 January 2006. Summary of changes for version 20060113:
4154 1) ACPI CA Core Subsystem:
4156 Added 2006 copyright to all module headers and signons. This affects
4157 virtually every file in the ACPICA core subsystem, iASL compiler, and the
4160 Enhanced the ACPICA error reporting in order to simplify user migration to
4161 the non-debug version of ACPICA. Replaced all instances of the
4162 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN debug
4163 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
4164 respectively. This preserves all error and warning messages in the non-debug
4165 version of the ACPICA code (this has been referred to as the "debug lite"
4166 option.) Over 200 cases were converted to create a total of over 380
4167 error/warning messages across the ACPICA code. This increases the code and
4168 data size of the default non-debug version of the code somewhat (about 13K),
4169 but all error/warning reporting may be disabled if desired (and code
4170 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
4171 configuration option. The size of the debug version of ACPICA remains about
4174 Fixed a memory leak within the AML Debugger "Set" command. One object was
4175 not properly deleted for every successful invocation of the command.
4177 Code and Data Size: The current and previous library sizes for the core
4178 subsystem are shown below. These are the code and data sizes for the
4179 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4180 values do not include any ACPI driver or OSPM code. The debug version of the
4181 code includes the debug output trace mechanism and has a much larger code
4182 and data size. Note that these values will vary depending on the efficiency
4183 of the compiler and the compiler options used during generation.
4186 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
4187 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
4189 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
4190 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
4193 2) iASL Compiler/Disassembler:
4195 The compiler now officially supports the ACPI 3.0a specification that was
4196 released on December 30, 2005. (Specification is available at www.acpi.info)
4198 ----------------------------------------
4199 16 December 2005. Summary of changes for version 20051216:
4201 1) ACPI CA Core Subsystem:
4203 Implemented optional support to allow unresolved names within ASL Package
4204 objects. A null object is inserted in the package when a named reference
4205 cannot be located in the current namespace. Enabled via the interpreter
4206 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on machines
4207 that contain such code.
4209 Implemented an optimization to the initialization sequence that can improve
4210 boot time. During ACPI device initialization, the _STA method is now run if
4211 and only if the _INI method exists. The _STA method is used to determine if
4212 the device is present; An _INI can only be run if _STA returns present, but
4213 it is a waste of time to run the _STA method if the _INI does not exist.
4214 (Prototype and assistance from Dong Wei)
4216 Implemented use of the C99 uintptr_t for the pointer casting macros if it is
4217 available in the current compiler. Otherwise, the default (void *) cast is
4220 Fixed some possible memory leaks found within the execution path of the
4221 Break, Continue, If, and CreateField operators. (Valery Podrezov)
4223 Fixed a problem introduced in the 20051202 release where an exception is
4224 generated during method execution if a control method attempts to declare
4227 Moved resource descriptor string constants that are used by both the AML
4228 disassembler and AML debugger to the common utilities directory so that
4229 these components are independent.
4231 Implemented support in the AcpiExec utility (-e switch) to globally ignore
4232 exceptions during control method execution (method is not aborted.)
4234 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
4237 Code and Data Size: The current and previous library sizes for the core
4238 subsystem are shown below. These are the code and data sizes for the
4239 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4240 values do not include any ACPI driver or OSPM code. The debug version of the
4241 code includes the debug output trace mechanism and has a much larger code
4242 and data size. Note that these values will vary depending on the efficiency
4243 of the compiler and the compiler options used during generation.
4246 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
4247 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
4249 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
4250 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
4253 2) iASL Compiler/Disassembler:
4255 Fixed a problem where a CPU stack overflow fault could occur if a recursive
4256 method call was made from within a Return statement.
4258 ----------------------------------------
4259 02 December 2005. Summary of changes for version 20051202:
4261 1) ACPI CA Core Subsystem:
4263 Modified the parsing of control methods to no longer create namespace
4264 objects during the first pass of the parse. Objects are now created only
4265 during the execute phase, at the moment the namespace creation operator is
4266 encountered in the AML (Name, OperationRegion, CreateByteField, etc.) This
4267 should eliminate ALREADY_EXISTS exceptions seen on some machines where
4268 reentrant control methods are protected by an AML mutex. The mutex will now
4269 correctly block multiple threads from attempting to create the same object
4272 Increased the number of available Owner Ids for namespace object tracking
4273 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen on
4274 some machines with a large number of ACPI tables (either static or dynamic).
4276 Fixed a problem with the AcpiExec utility where a fault could occur when the
4277 -b switch (batch mode) is used.
4279 Enhanced the namespace dump routine to output the owner ID for each
4282 Code and Data Size: The current and previous library sizes for the core
4283 subsystem are shown below. These are the code and data sizes for the
4284 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4285 values do not include any ACPI driver or OSPM code. The debug version of the
4286 code includes the debug output trace mechanism and has a much larger code
4287 and data size. Note that these values will vary depending on the efficiency
4288 of the compiler and the compiler options used during generation.
4291 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
4292 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
4294 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
4295 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
4298 2) iASL Compiler/Disassembler:
4300 Fixed a parse error during compilation of certain Switch/Case constructs. To
4301 simplify the parse, the grammar now allows for multiple Default statements
4302 and this error is now detected and flagged during the analysis phase.
4304 Disassembler: The disassembly now includes the contents of the original
4305 table header within a comment at the start of the file. This includes the
4306 name and version of the original ASL compiler.
4308 ----------------------------------------
4309 17 November 2005. Summary of changes for version 20051117:
4311 1) ACPI CA Core Subsystem:
4313 Fixed a problem in the AML parser where the method thread count could be
4314 decremented below zero if any errors occurred during the method parse phase.
4315 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some machines.
4316 This also fixed a related regression with the mechanism that detects and
4317 corrects methods that cannot properly handle reentrancy (related to the
4318 deployment of the new OwnerId mechanism.)
4320 Eliminated the pre-parsing of control methods (to detect errors) during
4321 table load. Related to the problem above, this was causing unwind issues if
4322 any errors occurred during the parse, and it seemed to be overkill. A table
4323 load should not be aborted if there are problems with any single control
4324 method, thus rendering this feature rather pointless.
4326 Fixed a problem with the new table-driven resource manager where an internal
4327 buffer overflow could occur for small resource templates.
4329 Implemented a new external interface, AcpiGetVendorResource. This interface
4330 will find and return a vendor-defined resource descriptor within a _CRS or
4331 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn Helgaas.
4333 Removed the length limit (200) on string objects as per the upcoming ACPI
4334 3.0A specification. This affects the following areas of the interpreter: 1)
4335 any implicit conversion of a Buffer to a String, 2) a String object result
4336 of the ASL Concatentate operator, 3) the String object result of the ASL
4339 Fixed a problem in the Windows OS interface layer (OSL) where a WAIT_FOREVER
4340 on a semaphore object would incorrectly timeout. This allows the
4341 multithreading features of the AcpiExec utility to work properly under
4344 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
4345 the recently added file named "utresrc.c".
4347 Code and Data Size: The current and previous library sizes for the core
4348 subsystem are shown below. These are the code and data sizes for the
4349 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4350 values do not include any ACPI driver or OSPM code. The debug version of the
4351 code includes the debug output trace mechanism and has a much larger code
4352 and data size. Note that these values will vary depending on the efficiency
4353 of the compiler and the compiler options used during generation.
4356 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
4357 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
4359 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
4360 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
4363 2) iASL Compiler/Disassembler:
4365 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
4366 specification. For the iASL compiler, this means that string literals within
4367 the source ASL can be of any length.
4369 Enhanced the listing output to dump the AML code for resource descriptors
4370 immediately after the ASL code for each descriptor, instead of in a block at
4371 the end of the entire resource template.
4373 Enhanced the compiler debug output to dump the entire original parse tree
4374 constructed during the parse phase, before any transforms are applied to the
4375 tree. The transformed tree is dumped also.
4377 ----------------------------------------
4378 02 November 2005. Summary of changes for version 20051102:
4380 1) ACPI CA Core Subsystem:
4382 Modified the subsystem initialization sequence to improve GPE support. The
4383 GPE initialization has been split into two parts in order to defer execution
4384 of the _PRW methods (Power Resources for Wake) until after the hardware is
4385 fully initialized and the SCI handler is installed. This allows the _PRW
4386 methods to access fields protected by the Global Lock. This will fix systems
4387 where a NO_GLOBAL_LOCK exception has been seen during initialization.
4389 Converted the ACPI internal object disassemble and display code within the
4390 AML debugger to fully table-driven operation, reducing code size and
4391 increasing maintainability.
4393 Fixed a regression with the ConcatenateResTemplate() ASL operator introduced
4394 in the 20051021 release.
4396 Implemented support for "local" internal ACPI object types within the
4397 debugger "Object" command and the AcpiWalkNamespace external interfaces.
4398 These local types include RegionFields, BankFields, IndexFields, Alias, and
4401 Moved common AML resource handling code into a new file, "utresrc.c". This
4402 code is shared by both the Resource Manager and the AML Debugger.
4404 Code and Data Size: The current and previous library sizes for the core
4405 subsystem are shown below. These are the code and data sizes for the
4406 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4407 values do not include any ACPI driver or OSPM code. The debug version of the
4408 code includes the debug output trace mechanism and has a much larger code
4409 and data size. Note that these values will vary depending on the efficiency
4410 of the compiler and the compiler options used during generation.
4413 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
4414 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
4416 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
4417 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
4420 2) iASL Compiler/Disassembler:
4422 Fixed a problem with very large initializer lists (more than 4000 elements)
4423 for both Buffer and Package objects where the parse stack could overflow.
4425 Enhanced the pre-compile source code scan for non-ASCII characters to ignore
4426 characters within comment fields. The scan is now always performed and is no
4427 longer optional, detecting invalid characters within a source file
4428 immediately rather than during the parse phase or later.
4430 Enhanced the ASL grammar definition to force early reductions on all list-
4431 style grammar elements so that the overall parse stack usage is greatly
4432 reduced. This should improve performance and reduce the possibility of parse
4435 Eliminated all reduce/reduce conflicts in the iASL parser generation. Also,
4436 with the addition of a %expected statement, the compiler generates from
4437 source with no warnings.
4439 Fixed a possible segment fault in the disassembler if the input filename
4440 does not contain a "dot" extension (Thomas Renninger).
4442 ----------------------------------------
4443 21 October 2005. Summary of changes for version 20051021:
4445 1) ACPI CA Core Subsystem:
4447 Implemented support for the EM64T and other x86-64 processors. This
4448 essentially entails recognizing that these processors support non-aligned
4449 memory transfers. Previously, all 64-bit processors were assumed to lack
4450 hardware support for non-aligned transfers.
4452 Completed conversion of the Resource Manager to nearly full table-driven
4453 operation. Specifically, the resource conversion code (convert AML to
4454 internal format and the reverse) and the debug code to dump internal
4455 resource descriptors are fully table-driven, reducing code and data size and
4456 improving maintainability.
4458 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag word
4459 on 64-bit processors instead of a fixed 32-bit word. (With assistance from
4460 Alexey Starikovskiy)
4462 Implemented support within the resource conversion code for the Type-
4463 Specific byte within the various ACPI 3.0 *WordSpace macros.
4465 Fixed some issues within the resource conversion code for the type-specific
4466 flags for both Memory and I/O address resource descriptors. For Memory,
4467 implemented support for the MTP and TTP flags. For I/O, split the TRS and
4468 TTP flags into two separate fields.
4470 Code and Data Size: The current and previous library sizes for the core
4471 subsystem are shown below. These are the code and data sizes for the
4472 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4473 values do not include any ACPI driver or OSPM code. The debug version of the
4474 code includes the debug output trace mechanism and has a much larger code
4475 and data size. Note that these values will vary depending on the efficiency
4476 of the compiler and the compiler options used during generation.
4479 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
4480 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
4482 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
4483 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
4487 2) iASL Compiler/Disassembler:
4489 Relaxed a compiler restriction that disallowed a ResourceIndex byte if the
4490 corresponding ResourceSource string was not also present in a resource
4491 descriptor declaration. This restriction caused problems with existing
4492 AML/ASL code that includes the Index byte without the string. When such AML
4493 was disassembled, it could not be compiled without modification. Further,
4494 the modified code created a resource template with a different size than the
4495 original, breaking code that used fixed offsets into the resource template
4498 Removed a recent feature of the disassembler to ignore a lone ResourceIndex
4499 byte. This byte is now emitted if present so that the exact AML can be
4500 reproduced when the disassembled code is recompiled.
4502 Improved comments and text alignment for the resource descriptor code
4503 emitted by the disassembler.
4505 Implemented disassembler support for the ACPI 3.0 AccessSize field within a
4506 Register() resource descriptor.
4508 ----------------------------------------
4509 30 September 2005. Summary of changes for version 20050930:
4511 1) ACPI CA Core Subsystem:
4513 Completed a major overhaul of the Resource Manager code - specifically,
4514 optimizations in the area of the AML/internal resource conversion code. The
4515 code has been optimized to simplify and eliminate duplicated code, CPU stack
4516 use has been decreased by optimizing function parameters and local
4517 variables, and naming conventions across the manager have been standardized
4518 for clarity and ease of maintenance (this includes function, parameter,
4519 variable, and struct/typedef names.) The update may force changes in some
4520 driver code, depending on how resources are handled by the host OS.
4522 All Resource Manager dispatch and information tables have been moved to a
4523 single location for clarity and ease of maintenance. One new file was
4524 created, named "rsinfo.c".
4526 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
4527 guarantee that the argument is not evaluated twice, making them less prone
4528 to macro side-effects. However, since there exists the possibility of
4529 additional stack use if a particular compiler cannot optimize them (such as
4530 in the debug generation case), the original macros are optionally available.
4531 Note that some invocations of the return_VALUE macro may now cause size
4532 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided to
4533 eliminate these. (From Randy Dunlap)
4535 Implemented a new mechanism to enable debug tracing for individual control
4536 methods. A new external interface, AcpiDebugTrace, is provided to enable
4537 this mechanism. The intent is to allow the host OS to easily enable and
4538 disable tracing for problematic control methods. This interface can be
4539 easily exposed to a user or debugger interface if desired. See the file
4540 psxface.c for details.
4542 AcpiUtCallocate will now return a valid pointer if a length of zero is
4543 specified - a length of one is used and a warning is issued. This matches
4544 the behavior of AcpiUtAllocate.
4546 Code and Data Size: The current and previous library sizes for the core
4547 subsystem are shown below. These are the code and data sizes for the
4548 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4549 values do not include any ACPI driver or OSPM code. The debug version of the
4550 code includes the debug output trace mechanism and has a much larger code
4551 and data size. Note that these values will vary depending on the efficiency
4552 of the compiler and the compiler options used during generation.
4555 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
4556 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
4558 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
4559 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
4562 2) iASL Compiler/Disassembler:
4564 A remark is issued if the effective compile-time length of a package or
4565 buffer is zero. Previously, this was a warning.
4567 ----------------------------------------
4568 16 September 2005. Summary of changes for version 20050916:
4570 1) ACPI CA Core Subsystem:
4572 Fixed a problem within the Resource Manager where support for the Generic
4573 Register descriptor was not fully implemented. This descriptor is now fully
4574 recognized, parsed, disassembled, and displayed.
4576 Completely restructured the Resource Manager code to utilize table-driven
4577 dispatch and lookup, eliminating many of the large switch() statements. This
4578 reduces overall subsystem code size and code complexity. Affects the
4579 resource parsing and construction, disassembly, and debug dump output.
4581 Cleaned up and restructured the debug dump output for all resource
4582 descriptors. Improved readability of the output and reduced code size.
4584 Fixed a problem where changes to internal data structures caused the
4585 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
4587 Code and Data Size: The current and previous library sizes for the core
4588 subsystem are shown below. These are the code and data sizes for the
4589 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
4590 values do not include any ACPI driver or OSPM code. The debug version of the
4591 code includes the debug output trace mechanism and has a much larger code
4592 and data size. Note that these values will vary depending on the efficiency
4593 of the compiler and the compiler options used during generation.
4596 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
4597 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
4599 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
4600 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
4603 2) iASL Compiler/Disassembler:
4605 Updated the disassembler to automatically insert an EndDependentFn() macro
4606 into the ASL stream if this macro is missing in the original AML code,
4607 simplifying compilation of the resulting ASL module.
4609 Fixed a problem in the disassembler where a disassembled ResourceSource
4610 string (within a large resource descriptor) was not surrounded by quotes and
4611 not followed by a comma, causing errors when the resulting ASL module was
4612 compiled. Also, escape sequences within a ResourceSource string are now
4613 handled correctly (especially "\\")
4615 ----------------------------------------
4616 02 September 2005. Summary of changes for version 20050902:
4618 1) ACPI CA Core Subsystem:
4620 Fixed a problem with the internal Owner ID allocation and deallocation
4621 mechanisms for control method execution and recursive method invocation.
4622 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
4623 messages seen on some systems. Recursive method invocation depth is
4624 currently limited to 255. (Alexey Starikovskiy)
4626 Completely eliminated all vestiges of support for the "module-level
4627 executable code" until this support is fully implemented and debugged. This
4628 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
4629 some systems that invoke this support.
4631 Fixed a problem within the resource manager code where the transaction flags
4632 for a 64-bit address descriptor were handled incorrectly in the type-
4635 Consolidated duplicate code within the address descriptor resource manager
4636 code, reducing overall subsystem code size.
4638 Fixed a fault when using the AML debugger "disassemble" command to
4639 disassemble individual control methods.
4641 Removed references to the "release_current" directory within the Unix
4644 Code and Data Size: The current and previous core subsystem library sizes
4645 are shown below. These are the code and data sizes for the acpica.lib
4646 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
4647 include any ACPI driver or OSPM code. The debug version of the code includes
4648 the debug output trace mechanism and has a much larger code and data size.
4649 Note that these values will vary depending on the efficiency of the compiler
4650 and the compiler options used during generation.
4653 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
4654 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
4656 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
4657 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
4660 2) iASL Compiler/Disassembler:
4662 Implemented an error check for illegal duplicate values in the interrupt and
4663 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
4666 Implemented error checking for the Irq() and IrqNoFlags() macros to detect
4667 too many values in the interrupt list (16 max) and invalid values in the
4670 The maximum length string literal within an ASL file is now restricted to
4671 200 characters as per the ACPI specification.
4673 Fixed a fault when using the -ln option (generate namespace listing).
4675 Implemented an error check to determine if a DescriptorName within a
4676 resource descriptor has already been used within the current scope.
4678 ----------------------------------------
4679 15 August 2005. Summary of changes for version 20050815:
4681 1) ACPI CA Core Subsystem:
4683 Implemented a full bytewise compare to determine if a table load request is
4684 attempting to load a duplicate table. The compare is performed if the table
4685 signatures and table lengths match. This will allow different tables with
4686 the same OEM Table ID and revision to be loaded - probably against the ACPI
4687 specification, but discovered in the field nonetheless.
4689 Added the changes.txt logfile to each of the zipped release packages.
4691 Code and Data Size: Current and previous core subsystem library sizes are
4692 shown below. These are the code and data sizes for the acpica.lib produced
4693 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4694 any ACPI driver or OSPM code. The debug version of the code includes the
4695 debug output trace mechanism and has a much larger code and data size. Note
4696 that these values will vary depending on the efficiency of the compiler and
4697 the compiler options used during generation.
4700 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
4701 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
4703 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
4704 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
4707 2) iASL Compiler/Disassembler:
4709 Fixed a problem where incorrect AML code could be generated for Package
4710 objects if optimization is disabled (via the -oa switch).
4712 Fixed a problem with where incorrect AML code is generated for variable-
4713 length packages when the package length is not specified and the number of
4714 initializer values is greater than 255.
4717 ----------------------------------------
4718 29 July 2005. Summary of changes for version 20050729:
4720 1) ACPI CA Core Subsystem:
4722 Implemented support to ignore an attempt to install/load a particular ACPI
4723 table more than once. Apparently there exists BIOS code that repeatedly
4724 attempts to load the same SSDT upon certain events. With assistance from
4725 Venkatesh Pallipadi.
4727 Restructured the main interface to the AML parser in order to correctly
4728 handle all exceptional conditions. This will prevent leakage of the OwnerId
4729 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
4730 machines. With assistance from Alexey Starikovskiy.
4732 Support for "module level code" has been disabled in this version due to a
4733 number of issues that have appeared on various machines. The support can be
4734 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
4735 compilation. When the issues are fully resolved, the code will be enabled by
4738 Modified the internal functions for debug print support to define the
4739 FunctionName parameter as a (const char *) for compatibility with compiler
4740 built-in macros such as __FUNCTION__, etc.
4742 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
4744 Implemented support to display an object count summary for the AML Debugger
4745 commands Object and Methods.
4747 Code and Data Size: Current and previous core subsystem library sizes are
4748 shown below. These are the code and data sizes for the acpica.lib produced
4749 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4750 any ACPI driver or OSPM code. The debug version of the code includes the
4751 debug output trace mechanism and has a much larger code and data size. Note
4752 that these values will vary depending on the efficiency of the compiler and
4753 the compiler options used during generation.
4756 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
4757 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
4759 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
4760 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
4763 2) iASL Compiler/Disassembler:
4765 Fixed a regression that appeared in the 20050708 version of the compiler
4766 where an error message was inadvertently emitted for invocations of the _OSI
4767 reserved control method.
4769 ----------------------------------------
4770 08 July 2005. Summary of changes for version 20050708:
4772 1) ACPI CA Core Subsystem:
4774 The use of the CPU stack in the debug version of the subsystem has been
4775 considerably reduced. Previously, a debug structure was declared in every
4776 function that used the debug macros. This structure has been removed in
4777 favor of declaring the individual elements as parameters to the debug
4778 functions. This reduces the cumulative stack use during nested execution of
4779 ACPI function calls at the cost of a small increase in the code size of the
4780 debug version of the subsystem. With assistance from Alexey Starikovskiy and
4783 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
4784 headers to define a macro that will return the current function name at
4785 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by
4786 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
4787 compiler-dependent header, the function name is saved on the CPU stack (one
4788 pointer per function.) This mechanism is used because apparently there
4789 exists no standard ANSI-C defined macro that that returns the function name.
4791 Redesigned and reimplemented the "Owner ID" mechanism used to track
4792 namespace objects created/deleted by ACPI tables and control method
4793 execution. A bitmap is now used to allocate and free the IDs, thus solving
4794 the wraparound problem present in the previous implementation. The size of
4795 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
4798 Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield
4799 flag definitions within the headers for the predefined ACPI tables. These
4800 have been replaced by UINT8_BIT in order to increase the code portability of
4801 the subsystem. If the use of UINT8 remains a problem, we may be forced to
4802 eliminate bitfields entirely because of a lack of portability.
4804 Enhanced the performance of the AcpiUtUpdateObjectReference procedure. This
4805 is a frequently used function and this improvement increases the performance
4806 of the entire subsystem (Alexey Starikovskiy).
4808 Fixed several possible memory leaks and the inverse - premature object
4809 deletion (Alexey Starikovskiy).
4811 Code and Data Size: Current and previous core subsystem library sizes are
4812 shown below. These are the code and data sizes for the acpica.lib produced
4813 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4814 any ACPI driver or OSPM code. The debug version of the code includes the
4815 debug output trace mechanism and has a much larger code and data size. Note
4816 that these values will vary depending on the efficiency of the compiler and
4817 the compiler options used during generation.
4820 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
4821 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
4823 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
4824 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
4826 ----------------------------------------
4827 24 June 2005. Summary of changes for version 20050624:
4829 1) ACPI CA Core Subsystem:
4831 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
4832 the host-defined cache object. This allows the OSL implementation to define
4833 and type this object in any manner desired, simplifying the OSL
4834 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
4835 Linux, and should be defined in the OS-specific header file for other
4836 operating systems as required.
4838 Changed the interface to AcpiOsAcquireObject to directly return the
4839 requested object as the function return (instead of ACPI_STATUS.) This
4840 change was made for performance reasons, since this is the purpose of the
4841 interface in the first place. AcpiOsAcquireObject is now similar to the
4842 AcpiOsAllocate interface.
4844 Implemented a new AML debugger command named Businfo. This command displays
4845 information about all devices that have an associate _PRT object. The _ADR,
4846 _HID, _UID, and _CID are displayed for these devices.
4848 Modified the initialization sequence in AcpiInitializeSubsystem to call the
4849 OSL interface AcpiOslInitialize first, before any local initialization. This
4850 change was required because the global initialization now calls OSL
4853 Enhanced the Dump command to display the entire contents of Package objects
4854 (including all sub-objects and their values.)
4856 Restructured the code base to split some files because of size and/or
4857 because the code logically belonged in a separate file. New files are listed
4858 below. All makefiles and project files included in the ACPI CA release have
4860 utilities/utcache.c /* Local cache interfaces */
4861 utilities/utmutex.c /* Local mutex support */
4862 utilities/utstate.c /* State object support */
4863 interpreter/parser/psloop.c /* Main AML parse loop */
4865 Code and Data Size: Current and previous core subsystem library sizes are
4866 shown below. These are the code and data sizes for the acpica.lib produced
4867 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4868 any ACPI driver or OSPM code. The debug version of the code includes the
4869 debug output trace mechanism and has a much larger code and data size. Note
4870 that these values will vary depending on the efficiency of the compiler and
4871 the compiler options used during generation.
4874 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
4875 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
4877 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
4878 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
4881 2) iASL Compiler/Disassembler:
4883 Fixed a regression introduced in version 20050513 where the use of a Package
4884 object within a Case() statement caused a compile time exception. The
4885 original behavior has been restored (a Match() operator is emitted.)
4887 ----------------------------------------
4888 17 June 2005. Summary of changes for version 20050617:
4890 1) ACPI CA Core Subsystem:
4892 Moved the object cache operations into the OS interface layer (OSL) to allow
4893 the host OS to handle these operations if desired (for example, the Linux
4894 OSL will invoke the slab allocator). This support is optional; the compile
4895 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache
4896 code in the ACPI CA core. The new OSL interfaces are shown below. See
4897 utalloc.c for an example implementation, and acpiosxf.h for the exact
4898 interface definitions. With assistance from Alexey Starikovskiy.
4905 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to return
4906 and restore a flags parameter. This fits better with many OS lock models.
4907 Note: the current execution state (interrupt handler or not) is no longer
4908 passed to these interfaces. If necessary, the OSL must determine this state
4909 by itself, a simple and fast operation. With assistance from Alexey
4912 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
4913 present if the revision of the RSDP was 2 or greater. According to the ACPI
4914 specification, the XSDT is optional in all cases, and the table manager
4915 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
4916 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain
4919 Fixed an interpreter problem with the Mid() operator in the case of an input
4920 string where the resulting output string is of zero length. It now correctly
4921 returns a valid, null terminated string object instead of a string object
4922 with a null pointer.
4924 Fixed a problem with the control method argument handling to allow a store
4925 to an Arg object that already contains an object of type Device. The Device
4926 object is now correctly overwritten. Previously, an error was returned.
4929 Enhanced the debugger Find command to emit object values in addition to the
4930 found object pathnames. The output format is the same as the dump namespace
4933 Enhanced the debugger Set command. It now has the ability to set the value
4934 of any Named integer object in the namespace (Previously, only method locals
4935 and args could be set.)
4937 Code and Data Size: Current and previous core subsystem library sizes are
4938 shown below. These are the code and data sizes for the acpica.lib produced
4939 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4940 any ACPI driver or OSPM code. The debug version of the code includes the
4941 debug output trace mechanism and has a much larger code and data size. Note
4942 that these values will vary depending on the efficiency of the compiler and
4943 the compiler options used during generation.
4946 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
4947 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
4949 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
4950 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
4953 2) iASL Compiler/Disassembler:
4955 Fixed a regression in the disassembler where if/else/while constructs were
4956 output incorrectly. This problem was introduced in the previous release
4957 (20050526). This problem also affected the single-step disassembly in the
4960 Fixed a problem where compiling the reserved _OSI method would randomly (but
4961 rarely) produce compile errors.
4963 Enhanced the disassembler to emit compilable code in the face of incorrect
4964 AML resource descriptors. If the optional ResourceSourceIndex is present,
4965 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
4966 disassembly. Otherwise, the resulting code cannot be compiled without
4969 ----------------------------------------
4970 26 May 2005. Summary of changes for version 20050526:
4972 1) ACPI CA Core Subsystem:
4974 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
4975 the module level (not within a control method.) These opcodes are executed
4976 exactly once at the time the table is loaded. This type of code was legal up
4977 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA in
4978 order to provide backwards compatibility with earlier BIOS implementations.
4979 This eliminates the "Encountered executable code at module level" warning
4980 that was previously generated upon detection of such code.
4982 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
4983 inadvertently be generated during the lookup of namespace objects in the
4984 second pass parse of ACPI tables and control methods. It appears that this
4985 problem could occur during the resolution of forward references to namespace
4988 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
4989 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
4990 allows the deadlock detection debug code to be compiled out in the normal
4991 case, improving mutex performance (and overall subsystem performance)
4994 Implemented a handful of miscellaneous fixes for possible memory leaks on
4995 error conditions and error handling control paths. These fixes were
4996 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
4998 Added a check for a null RSDT pointer in AcpiGetFirmwareTable (tbxfroot.c)
4999 to prevent a fault in this error case.
5001 Code and Data Size: Current and previous core subsystem library sizes are
5002 shown below. These are the code and data sizes for the acpica.lib produced
5003 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5004 any ACPI driver or OSPM code. The debug version of the code includes the
5005 debug output trace mechanism and has a much larger code and data size. Note
5006 that these values will vary depending on the efficiency of the compiler and
5007 the compiler options used during generation.
5010 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
5011 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
5013 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
5014 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
5017 2) iASL Compiler/Disassembler:
5019 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
5020 the module level (not within a control method.) These operators will be
5021 executed once at the time the table is loaded. This type of code was legal
5022 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
5023 compiler in order to provide backwards compatibility with earlier BIOS ASL
5026 The ACPI integer width (specified via the table revision ID or the -r
5027 override, 32 or 64 bits) is now used internally during compile-time constant
5028 folding to ensure that constants are truncated to 32 bits if necessary.
5029 Previously, the revision ID value was only emitted in the AML table header.
5031 An error message is now generated for the Mutex and Method operators if the
5032 SyncLevel parameter is outside the legal range of 0 through 15.
5034 Fixed a problem with the Method operator ParameterTypes list handling (ACPI
5035 3.0). Previously, more than 2 types or 2 arguments generated a syntax error.
5036 The actual underlying implementation of method argument typechecking is
5037 still under development, however.
5039 ----------------------------------------
5040 13 May 2005. Summary of changes for version 20050513:
5042 1) ACPI CA Core Subsystem:
5044 Implemented support for PCI Express root bridges -- added support for device
5045 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
5047 The interpreter now automatically truncates incoming 64-bit constants to 32
5048 bits if currently executing out of a 32-bit ACPI table (Revision < 2). This
5049 also affects the iASL compiler constant folding. (Note: as per below, the
5050 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
5052 Fixed a problem where string and buffer objects with "static" pointers
5053 (pointers to initialization data within an ACPI table) were not handled
5054 consistently. The internal object copy operation now always copies the data
5055 to a newly allocated buffer, regardless of whether the source object is
5058 Fixed a problem with the FromBCD operator where an implicit result
5059 conversion was improperly performed while storing the result to the target
5060 operand. Since this is an "explicit conversion" operator, the implicit
5061 conversion should never be performed on the output.
5063 Fixed a problem with the CopyObject operator where a copy to an existing
5064 named object did not always completely overwrite the existing object stored
5065 at name. Specifically, a buffer-to-buffer copy did not delete the existing
5068 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces and
5069 structs for consistency.
5071 Code and Data Size: Current and previous core subsystem library sizes are
5072 shown below. These are the code and data sizes for the acpica.lib produced
5073 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5074 any ACPI driver or OSPM code. The debug version of the code includes the
5075 debug output trace mechanism and has a much larger code and data size. Note
5076 that these values will vary depending on the efficiency of the compiler and
5077 the compiler options used during generation.
5080 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
5081 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
5082 Current Release: (Same sizes)
5083 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
5084 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
5087 2) iASL Compiler/Disassembler:
5089 The compiler now emits a warning if an attempt is made to generate a 64-bit
5090 integer constant from within a 32-bit ACPI table (Revision < 2). The integer
5091 is truncated to 32 bits.
5093 Fixed a problem with large package objects: if the static length of the
5094 package is greater than 255, the "variable length package" opcode is
5095 emitted. Previously, this caused an error. This requires an update to the
5096 ACPI spec, since it currently (incorrectly) states that packages larger than
5097 255 elements are not allowed.
5099 The disassembler now correctly handles variable length packages and packages
5100 larger than 255 elements.
5102 ----------------------------------------
5103 08 April 2005. Summary of changes for version 20050408:
5105 1) ACPI CA Core Subsystem:
5107 Fixed three cases in the interpreter where an "index" argument to an ASL
5108 function was still (internally) 32 bits instead of the required 64 bits.
5109 This was the Index argument to the Index, Mid, and Match operators.
5111 The "strupr" function is now permanently local (AcpiUtStrupr), since this is
5112 not a POSIX-defined function and not present in most kernel-level C
5113 libraries. All references to the C library strupr function have been removed
5116 Completed the deployment of static functions/prototypes. All prototypes with
5117 the static attribute have been moved from the headers to the owning C file.
5119 Implemented an extract option (-e) for the AcpiBin utility (AML binary
5120 utility). This option allows the utility to extract individual ACPI tables
5121 from the output of AcpiDmp. It provides the same functionality of the
5122 acpixtract.pl perl script without the worry of setting the correct perl
5123 options. AcpiBin runs on Windows and has not yet been generated/validated in
5124 the Linux/Unix environment (but should be soon).
5126 Updated and fixed the table dump option for AcpiBin (-d). This option
5127 converts a single ACPI table to a hex/ascii file, similar to the output of
5130 Code and Data Size: Current and previous core subsystem library sizes are
5131 shown below. These are the code and data sizes for the acpica.lib produced
5132 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5133 any ACPI driver or OSPM code. The debug version of the code includes the
5134 debug output trace mechanism and has a much larger code and data size. Note
5135 that these values will vary depending on the efficiency of the compiler and
5136 the compiler options used during generation.
5139 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
5140 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
5142 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
5143 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
5146 2) iASL Compiler/Disassembler:
5148 Disassembler fix: Added a check to ensure that the table length found in the
5149 ACPI table header within the input file is not longer than the actual input
5150 file size. This indicates some kind of file or table corruption.
5152 ----------------------------------------
5153 29 March 2005. Summary of changes for version 20050329:
5155 1) ACPI CA Core Subsystem:
5157 An error is now generated if an attempt is made to create a Buffer Field of
5158 length zero (A CreateField with a length operand of zero.)
5160 The interpreter now issues a warning whenever executable code at the module
5161 level is detected during ACPI table load. This will give some idea of the
5162 prevalence of this type of code.
5164 Implemented support for references to named objects (other than control
5165 methods) within package objects.
5167 Enhanced package object output for the debug object. Package objects are now
5168 completely dumped, showing all elements.
5170 Enhanced miscellaneous object output for the debug object. Any object can
5171 now be written to the debug object (for example, a device object can be
5172 written, and the type of the object will be displayed.)
5174 The "static" qualifier has been added to all local functions across both the
5175 core subsystem and the iASL compiler.
5177 The number of "long" lines (> 80 chars) within the source has been
5178 significantly reduced, by about 1/3.
5180 Cleaned up all header files to ensure that all CA/iASL functions are
5181 prototyped (even static functions) and the formatting is consistent.
5183 Two new header files have been added, acopcode.h and acnames.h.
5185 Removed several obsolete functions that were no longer used.
5187 Code and Data Size: Current and previous core subsystem library sizes are
5188 shown below. These are the code and data sizes for the acpica.lib produced
5189 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5190 any ACPI driver or OSPM code. The debug version of the code includes the
5191 debug output trace mechanism and has a much larger code and data size. Note
5192 that these values will vary depending on the efficiency of the compiler and
5193 the compiler options used during generation.
5196 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5197 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
5199 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
5200 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
5204 2) iASL Compiler/Disassembler:
5206 Fixed a problem with the resource descriptor generation/support. For the
5207 ResourceSourceIndex and the ResourceSource fields, both must be present, or
5208 both must be not present - can't have one without the other.
5210 The compiler now returns non-zero from the main procedure if any errors have
5211 occurred during the compilation.
5214 ----------------------------------------
5215 09 March 2005. Summary of changes for version 20050309:
5217 1) ACPI CA Core Subsystem:
5219 The string-to-buffer implicit conversion code has been modified again after
5220 a change to the ACPI specification. In order to match the behavior of the
5221 other major ACPI implementation, the target buffer is no longer truncated if
5222 the source string is smaller than an existing target buffer. This change
5223 requires an update to the ACPI spec, and should eliminate the recent
5224 AE_AML_BUFFER_LIMIT issues.
5226 The "implicit return" support was rewritten to a new algorithm that solves
5227 the general case. Rather than attempt to determine when a method is about to
5228 exit, the result of every ASL operator is saved momentarily until the very
5229 next ASL operator is executed. Therefore, no matter how the method exits,
5230 there will always be a saved implicit return value. This feature is only
5231 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should eliminate
5232 AE_AML_NO_RETURN_VALUE errors when enabled.
5234 Implemented implicit conversion support for the predicate (operand) of the
5235 If, Else, and While operators. String and Buffer arguments are automatically
5236 converted to Integers.
5238 Changed the string-to-integer conversion behavior to match the new ACPI
5239 errata: "If no integer object exists, a new integer is created. The ASCII
5240 string is interpreted as a hexadecimal constant. Each string character is
5241 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
5242 with the first character as the most significant digit, and ending with the
5243 first non-hexadecimal character or end-of-string." This means that the first
5244 non-hex character terminates the conversion and this is the code that was
5247 Fixed a problem where the ObjectType operator would fail (fault) when used
5248 on an Index of a Package which pointed to a null package element. The
5249 operator now properly returns zero (Uninitialized) in this case.
5251 Fixed a problem where the While operator used excessive memory by not
5252 properly popping the result stack during execution. There was no memory leak
5253 after execution, however. (Code provided by Valery Podrezov.)
5255 Fixed a problem where references to control methods within Package objects
5256 caused the method to be invoked, instead of producing a reference object
5257 pointing to the method.
5259 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree) to
5260 improve performance and reduce code size. (Code provided by Alexey
5263 Code and Data Size: Current and previous core subsystem library sizes are
5264 shown below. These are the code and data sizes for the acpica.lib produced
5265 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5266 any ACPI driver or OSPM code. The debug version of the code includes the
5267 debug output trace mechanism and has a much larger code and data size. Note
5268 that these values will vary depending on the efficiency of the compiler and
5269 the compiler options used during generation.
5272 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5273 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
5275 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5276 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
5279 2) iASL Compiler/Disassembler:
5281 Fixed a problem with the Return operator with no arguments. Since the AML
5282 grammar for the byte encoding requires an operand for the Return opcode, the
5283 compiler now emits a Return(Zero) for this case. An ACPI specification
5284 update has been written for this case.
5286 For tables other than the DSDT, namepath optimization is automatically
5287 disabled. This is because SSDTs can be loaded anywhere in the namespace, the
5288 compiler has no knowledge of where, and thus cannot optimize namepaths.
5290 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
5291 inadvertently omitted from the ACPI specification, and will require an
5294 The source file scan for ASCII characters is now optional (-a). This change
5295 was made because some vendors place non-ascii characters within comments.
5296 However, the scan is simply a brute-force byte compare to ensure all
5297 characters in the file are in the range 0x00 to 0x7F.
5299 Fixed a problem with the CondRefOf operator where the compiler was
5300 inappropriately checking for the existence of the target. Since the point of
5301 the operator is to check for the existence of the target at run-time, the
5302 compiler no longer checks for the target existence.
5304 Fixed a problem where errors generated from the internal AML interpreter
5305 during constant folding were not handled properly, causing a fault.
5307 Fixed a problem with overly aggressive range checking for the Stall
5308 operator. The valid range (max 255) is now only checked if the operand is of
5309 type Integer. All other operand types cannot be statically checked.
5311 Fixed a problem where control method references within the RefOf, DeRefOf,
5312 and ObjectType operators were not treated properly. They are now treated as
5313 actual references, not method invocations.
5315 Fixed and enhanced the "list namespace" option (-ln). This option was broken
5316 a number of releases ago.
5318 Improved error handling for the Field, IndexField, and BankField operators.
5319 The compiler now cleanly reports and recovers from errors in the field
5320 component (FieldUnit) list.
5322 Fixed a disassembler problem where the optional ResourceDescriptor fields
5323 TRS and TTP were not always handled correctly.
5325 Disassembler - Comments in output now use "//" instead of "/*"
5327 ----------------------------------------
5328 28 February 2005. Summary of changes for version 20050228:
5330 1) ACPI CA Core Subsystem:
5332 Fixed a problem where the result of an Index() operator (an object
5333 reference) must increment the reference count on the target object for the
5334 life of the object reference.
5336 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
5337 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and WordSpace
5338 resource descriptors.
5340 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
5341 Space Descriptor" string, indicating interpreter support for the descriptors
5344 Implemented header support for the new ACPI 3.0 FADT flag bits.
5346 Implemented header support for the new ACPI 3.0 PCI Express bits for the PM1
5347 status/enable registers.
5349 Updated header support for the MADT processor local Apic struct and MADT
5350 platform interrupt source struct for new ACPI 3.0 fields.
5352 Implemented header support for the SRAT and SLIT ACPI tables.
5354 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack" flag
5357 Code and Data Size: Current and previous core subsystem library sizes are
5358 shown below. These are the code and data sizes for the acpica.lib produced
5359 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5360 any ACPI driver or OSPM code. The debug version of the code includes the
5361 debug output trace mechanism and has a much larger code and data size. Note
5362 that these values will vary depending on the efficiency of the compiler and
5363 the compiler options used during generation.
5366 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
5367 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
5369 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5370 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
5373 2) iASL Compiler/Disassembler:
5375 Fixed a problem with the internal 64-bit String-to-integer conversion with
5376 strings less than two characters long.
5378 Fixed a problem with constant folding where the result of the Index()
5379 operator can not be considered a constant. This means that Index() cannot be
5380 a type3 opcode and this will require an update to the ACPI specification.
5382 Disassembler: Implemented support for the TTP, MTP, and TRS resource
5383 descriptor fields. These fields were inadvertently ignored and not output in
5384 the disassembly of the resource descriptor.
5387 ----------------------------------------
5388 11 February 2005. Summary of changes for version 20050211:
5390 1) ACPI CA Core Subsystem:
5392 Implemented ACPI 3.0 support for implicit conversion within the Match()
5393 operator. MatchObjects can now be of type integer, buffer, or string instead
5394 of just type integer. Package elements are implicitly converted to the type
5395 of the MatchObject. This change aligns the behavior of Match() with the
5396 behavior of the other logical operators (LLess(), etc.) It also requires an
5397 errata change to the ACPI specification as this support was intended for
5398 ACPI 3.0, but was inadvertently omitted.
5400 Fixed a problem with the internal implicit "to buffer" conversion. Strings
5401 that are converted to buffers will cause buffer truncation if the string is
5402 smaller than the target buffer. Integers that are converted to buffers will
5403 not cause buffer truncation, only zero extension (both as per the ACPI
5404 spec.) The problem was introduced when code was added to truncate the
5405 buffer, but this should not be performed in all cases, only the string case.
5407 Fixed a problem with the Buffer and Package operators where the interpreter
5408 would get confused if two such operators were used as operands to an ASL
5409 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
5410 stack was not being popped after the execution of these operators, resulting
5411 in an AE_NO_RETURN_VALUE exception.
5413 Fixed a problem with constructs of the form Store(Index(...),...). The
5414 reference object returned from Index was inadvertently resolved to an actual
5415 value. This problem was introduced in version 20050114 when the behavior of
5416 Store() was modified to restrict the object types that can be used as the
5417 source operand (to match the ACPI specification.)
5419 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
5421 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
5423 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
5425 Code and Data Size: Current and previous core subsystem library sizes are
5426 shown below. These are the code and data sizes for the acpica.lib produced
5427 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5428 any ACPI driver or OSPM code. The debug version of the code includes the
5429 debug output trace mechanism and has a much larger code and data size. Note
5430 that these values will vary depending on the efficiency of the compiler and
5431 the compiler options used during generation.
5434 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
5435 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
5437 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
5438 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
5441 2) iASL Compiler/Disassembler:
5443 Fixed a code generation problem in the constant folding optimization code
5444 where incorrect code was generated if a constant was reduced to a buffer
5445 object (i.e., a reduced type 5 opcode.)
5447 Fixed a typechecking problem for the ToBuffer operator. Caused by an
5448 incorrect return type in the internal opcode information table.
5450 ----------------------------------------
5451 25 January 2005. Summary of changes for version 20050125:
5453 1) ACPI CA Core Subsystem:
5455 Fixed a recently introduced problem with the Global Lock where the
5456 underlying semaphore was not created. This problem was introduced in
5457 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
5458 Acquire() operation on _GL.
5460 The local object cache is now optional, and is disabled by default. Both
5461 AcpiExec and the iASL compiler enable the cache because they run in user
5462 mode and this enhances their performance. #define ACPI_ENABLE_OBJECT_CACHE
5463 to enable the local cache.
5465 Fixed an issue in the internal function AcpiUtEvaluateObject concerning the
5466 optional "implicit return" support where an error was returned if no return
5467 object was expected, but one was implicitly returned. AE_OK is now returned
5468 in this case and the implicitly returned object is deleted.
5469 AcpiUtEvaluateObject is only occasionally used, and only to execute reserved
5470 methods such as _STA and _INI where the return type is known up front.
5472 Fixed a few issues with the internal convert-to-integer code. It now returns
5473 an error if an attempt is made to convert a null string, a string of only
5474 blanks/tabs, or a zero-length buffer. This affects both implicit conversion
5475 and explicit conversion via the ToInteger() operator.
5477 The internal debug code in AcpiUtAcquireMutex has been commented out. It is
5478 not needed for normal operation and should increase the performance of the
5479 entire subsystem. The code remains in case it is needed for debug purposes
5482 The AcpiExec source and makefile are included in the Unix/Linux package for
5485 Code and Data Size: Current and previous core subsystem library sizes are
5486 shown below. These are the code and data sizes for the acpica.lib produced
5487 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5488 any ACPI driver or OSPM code. The debug version of the code includes the
5489 debug output trace mechanism and has a much larger code and data size. Note
5490 that these values will vary depending on the efficiency of the compiler and
5491 the compiler options used during generation.
5494 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
5495 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
5497 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
5498 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
5500 2) iASL Compiler/Disassembler:
5502 Switch/Case support: A warning is now issued if the type of the Switch value
5503 cannot be determined at compile time. For example, Switch(Arg0) will
5504 generate the warning, and the type is assumed to be an integer. As per the
5505 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate the
5508 Switch/Case support: Implemented support for buffer and string objects as
5509 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
5510 buffers and strings.
5512 Switch/Case support: The emitted code for the LEqual() comparisons now uses
5513 the switch value as the first operand, not the second. The case value is now
5514 the second operand, and this allows the case value to be implicitly
5515 converted to the type of the switch value, not the other way around.
5517 Switch/Case support: Temporary variables are now emitted immediately within
5518 the control method, not at the global level. This means that there are now
5519 36 temps available per-method, not 36 temps per-module as was the case with
5520 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
5522 ----------------------------------------
5523 14 January 2005. Summary of changes for version 20050114:
5525 Added 2005 copyright to all module headers. This affects every module in
5526 the core subsystem, iASL compiler, and the utilities.
5528 1) ACPI CA Core Subsystem:
5530 Fixed an issue with the String-to-Buffer conversion code where the string
5531 null terminator was not included in the buffer after conversion, but there
5532 is existing ASL that assumes the string null terminator is included. This is
5533 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
5534 introduced in the previous version when the code was updated to correctly
5535 set the converted buffer size as per the ACPI specification. The ACPI spec
5536 is ambiguous and will be updated to specify that the null terminator must be
5537 included in the converted buffer. This also affects the ToBuffer() ASL
5540 Fixed a problem with the Mid() ASL/AML operator where it did not work
5541 correctly on Buffer objects. Newly created sub-buffers were not being marked
5545 Fixed a problem in AcpiTbFindTable where incorrect string compares were
5546 performed on the OemId and OemTableId table header fields. These fields are
5547 not null terminated, so strncmp is now used instead of strcmp.
5549 Implemented a restriction on the Store() ASL/AML operator to align the
5550 behavior with the ACPI specification. Previously, any object could be used
5551 as the source operand. Now, the only objects that may be used are Integers,
5552 Buffers, Strings, Packages, Object References, and DDB Handles. If
5553 necessary, the original behavior can be restored by enabling the
5554 EnableInterpreterSlack flag.
5556 Enhanced the optional "implicit return" support to allow an implicit return
5557 value from methods that are invoked externally via the AcpiEvaluateObject
5558 interface. This enables implicit returns from the _STA and _INI methods,
5561 Changed the Revision() ASL/AML operator to return the current version of the
5562 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly returned
5563 the supported ACPI version (This is the function of the _REV method).
5565 Updated the _REV predefined method to return the currently supported version
5568 Implemented batch mode option for the AcpiExec utility (-b).
5570 Code and Data Size: Current and previous core subsystem library sizes are
5571 shown below. These are the code and data sizes for the acpica.lib produced
5572 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5573 any ACPI driver or OSPM code. The debug version of the code includes the
5574 debug output trace mechanism and has a much larger code and data size. Note
5575 that these values will vary depending on the efficiency of the compiler and
5576 the compiler options used during generation.
5579 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5580 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
5582 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
5583 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
5585 ----------------------------------------
5586 10 December 2004. Summary of changes for version 20041210:
5588 ACPI 3.0 support is nearing completion in both the iASL compiler and the
5589 ACPI CA core subsystem.
5591 1) ACPI CA Core Subsystem:
5593 Fixed a problem in the ToDecimalString operator where the resulting string
5594 length was incorrectly calculated. The length is now calculated exactly,
5595 eliminating incorrect AE_STRING_LIMIT exceptions.
5597 Fixed a problem in the ToHexString operator to allow a maximum 200 character
5598 string to be produced.
5600 Fixed a problem in the internal string-to-buffer and buffer-to-buffer copy
5601 routine where the length of the resulting buffer was not truncated to the
5602 new size (if the target buffer already existed).
5604 Code and Data Size: Current and previous core subsystem library sizes are
5605 shown below. These are the code and data sizes for the acpica.lib produced
5606 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5607 any ACPI driver or OSPM code. The debug version of the code includes the
5608 debug output trace mechanism and has a much larger code and data size. Note
5609 that these values will vary depending on the efficiency of the compiler and
5610 the compiler options used during generation.
5613 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5614 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
5616 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5617 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
5620 2) iASL Compiler/Disassembler:
5622 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
5623 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
5624 Includes support in the disassembler.
5626 Implemented support for the new (ACPI 3.0) parameter to the Register macro,
5629 Fixed a problem where the _HE resource name for the Interrupt macro was
5630 referencing bit 0 instead of bit 1.
5632 Implemented check for maximum 255 interrupts in the Interrupt macro.
5634 Fixed a problem with the predefined resource descriptor names where
5635 incorrect AML code was generated if the offset within the resource buffer
5636 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
5637 but did not update the surrounding package lengths.
5639 Changes to the Dma macro: All channels within the channel list must be in
5640 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
5641 optional (default is BusMaster).
5643 Implemented check for maximum 7 data bytes for the VendorShort macro.
5645 The ReadWrite parameter is now optional for the Memory32 and similar macros.
5647 ----------------------------------------
5648 03 December 2004. Summary of changes for version 20041203:
5650 1) ACPI CA Core Subsystem:
5652 The low-level field insertion/extraction code (exfldio) has been completely
5653 rewritten to eliminate unnecessary complexity, bugs, and boundary
5656 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and ToDecimalString
5657 operators where the input operand could be inadvertently deleted if no
5658 conversion was necessary (e.g., if the input to ToInteger was an Integer
5661 Fixed a problem with the ToDecimalString and ToHexString where an incorrect
5662 exception code was returned if the resulting string would be > 200 chars.
5663 AE_STRING_LIMIT is now returned.
5665 Fixed a problem with the Concatenate operator where AE_OK was always
5666 returned, even if the operation failed.
5668 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
5669 semaphores to be allocated.
5671 Code and Data Size: Current and previous core subsystem library sizes are
5672 shown below. These are the code and data sizes for the acpica.lib produced
5673 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5674 any ACPI driver or OSPM code. The debug version of the code includes the
5675 debug output trace mechanism and has a much larger code and data size. Note
5676 that these values will vary depending on the efficiency of the compiler and
5677 the compiler options used during generation.
5680 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
5681 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
5683 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
5684 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
5687 2) iASL Compiler/Disassembler:
5689 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
5690 recently introduced in 20041119.
5692 Fixed a problem with the ToUUID macro where the upper nybble of each buffer
5693 byte was inadvertently set to zero.
5695 ----------------------------------------
5696 19 November 2004. Summary of changes for version 20041119:
5698 1) ACPI CA Core Subsystem:
5700 Fixed a problem in the internal ConvertToInteger routine where new integers
5701 were not truncated to 32 bits for 32-bit ACPI tables. This routine converts
5702 buffers and strings to integers.
5704 Implemented support to store a value to an Index() on a String object. This
5705 is an ACPI 2.0 feature that had not yet been implemented.
5707 Implemented new behavior for storing objects to individual package elements
5708 (via the Index() operator). The previous behavior was to invoke the implicit
5709 conversion rules if an object was already present at the index. The new
5710 behavior is to simply delete any existing object and directly store the new
5711 object. Although the ACPI specification seems unclear on this subject, other
5712 ACPI implementations behave in this manner. (This is the root of the
5713 AE_BAD_HEX_CONSTANT issue.)
5715 Modified the RSDP memory scan mechanism to support the extended checksum for
5716 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
5717 RSDP signature is found with a valid checksum.
5719 Code and Data Size: Current and previous core subsystem library sizes are
5720 shown below. These are the code and data sizes for the acpica.lib produced
5721 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5722 any ACPI driver or OSPM code. The debug version of the code includes the
5723 debug output trace mechanism and has a much larger code and data size. Note
5724 that these values will vary depending on the efficiency of the compiler and
5725 the compiler options used during generation.
5728 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
5729 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
5731 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
5732 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
5735 2) iASL Compiler/Disassembler:
5737 Fixed a missing semicolon in the aslcompiler.y file.
5739 ----------------------------------------
5740 05 November 2004. Summary of changes for version 20041105:
5742 1) ACPI CA Core Subsystem:
5744 Implemented support for FADT revision 2. This was an interim table (between
5745 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
5747 Implemented optional support to allow uninitialized LocalX and ArgX
5748 variables in a control method. The variables are initialized to an Integer
5749 object with a value of zero. This support is enabled by setting the
5750 AcpiGbl_EnableInterpreterSlack flag to TRUE.
5752 Implemented support for Integer objects for the SizeOf operator. Either 4
5753 or 8 is returned, depending on the current integer size (32-bit or 64-bit,
5754 depending on the parent table revision).
5756 Fixed a problem in the implementation of the SizeOf and ObjectType operators
5757 where the operand was resolved to a value too early, causing incorrect
5758 return values for some objects.
5760 Fixed some possible memory leaks during exceptional conditions.
5762 Code and Data Size: Current and previous core subsystem library sizes are
5763 shown below. These are the code and data sizes for the acpica.lib produced
5764 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5765 any ACPI driver or OSPM code. The debug version of the code includes the
5766 debug output trace mechanism and has a much larger code and data size. Note
5767 that these values will vary depending on the efficiency of the compiler and
5768 the compiler options used during generation.
5771 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5772 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
5774 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
5775 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
5778 2) iASL Compiler/Disassembler:
5780 Implemented support for all ACPI 3.0 reserved names and methods.
5782 Implemented all ACPI 3.0 grammar elements in the front-end, including
5783 support for semicolons.
5785 Implemented the ACPI 3.0 Function() and ToUUID() macros
5787 Fixed a problem in the disassembler where a Scope() operator would not be
5788 emitted properly if the target of the scope was in another table.
5790 ----------------------------------------
5791 15 October 2004. Summary of changes for version 20041015:
5793 Note: ACPI CA is currently undergoing an in-depth and complete formal
5794 evaluation to test/verify the following areas. Other suggestions are
5795 welcome. This will result in an increase in the frequency of releases and
5796 the number of bug fixes in the next few months.
5797 - Functional tests for all ASL/AML operators
5798 - All implicit/explicit type conversions
5799 - Bit fields and operation regions
5800 - 64-bit math support and 32-bit-only "truncated" math support
5801 - Exceptional conditions, both compiler and interpreter
5802 - Dynamic object deletion and memory leaks
5803 - ACPI 3.0 support when implemented
5804 - External interfaces to the ACPI subsystem
5807 1) ACPI CA Core Subsystem:
5809 Fixed two alignment issues on 64-bit platforms - within debug statements in
5810 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the Address
5811 field within the non-aligned ACPI generic address structure.
5813 Fixed a problem in the Increment and Decrement operators where incorrect
5814 operand resolution could result in the inadvertent modification of the
5815 original integer when the integer is passed into another method as an
5816 argument and the arg is then incremented/decremented.
5818 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-bit
5819 BCD number were truncated during conversion.
5821 Fixed a problem in the ToDecimal operator where the length of the resulting
5822 string could be set incorrectly too long if the input operand was a Buffer
5825 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte (0)
5826 within a buffer would prematurely terminate a compare between buffer
5829 Added a check for string overflow (>200 characters as per the ACPI
5830 specification) during the Concatenate operator with two string operands.
5832 Code and Data Size: Current and previous core subsystem library sizes are
5833 shown below. These are the code and data sizes for the acpica.lib produced
5834 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5835 any ACPI driver or OSPM code. The debug version of the code includes the
5836 debug output trace mechanism and has a much larger code and data size. Note
5837 that these values will vary depending on the efficiency of the compiler and
5838 the compiler options used during generation.
5841 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5842 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
5844 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5845 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
5849 2) iASL Compiler/Disassembler:
5851 Allow the use of the ObjectType operator on uninitialized Locals and Args
5852 (returns 0 as per the ACPI specification).
5854 Fixed a problem where the compiler would fault if there was a syntax error
5855 in the FieldName of all of the various CreateXXXField operators.
5857 Disallow the use of lower case letters within the EISAID macro, as per the
5858 ACPI specification. All EISAID strings must be of the form "UUUNNNN" Where
5859 U is an uppercase letter and N is a hex digit.
5862 ----------------------------------------
5863 06 October 2004. Summary of changes for version 20041006:
5865 1) ACPI CA Core Subsystem:
5867 Implemented support for the ACPI 3.0 Timer operator. This ASL function
5868 implements a 64-bit timer with 100 nanosecond granularity.
5870 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
5871 implement the ACPI 3.0 Timer operator. This allows the host OS to implement
5872 the timer with the best clock available. Also, it keeps the core subsystem
5873 out of the clock handling business, since the host OS (usually) performs
5876 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
5877 functions use a 64-bit address which is part of the packed ACPI Generic
5878 Address Structure. Since the structure is non-aligned, the alignment macros
5879 are now used to extract the address to a local variable before use.
5881 Fixed a problem where the ToInteger operator assumed all input strings were
5882 hexadecimal. The operator now handles both decimal strings and hex strings
5883 (prefixed with "0x").
5885 Fixed a problem where the string length in the string object created as a
5886 result of the internal ConvertToString procedure could be incorrect. This
5887 potentially affected all implicit conversions and also the ToDecimalString
5888 and ToHexString operators.
5890 Fixed two problems in the ToString operator. If the length parameter was
5891 zero, an incorrect string object was created and the value of the input
5892 length parameter was inadvertently changed from zero to Ones.
5894 Fixed a problem where the optional ResourceSource string in the ExtendedIRQ
5895 resource macro was ignored.
5897 Simplified the interfaces to the internal division functions, reducing code
5898 size and complexity.
5900 Code and Data Size: Current and previous core subsystem library sizes are
5901 shown below. These are the code and data sizes for the acpica.lib produced
5902 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5903 any ACPI driver or OSPM code. The debug version of the code includes the
5904 debug output trace mechanism and has a much larger code and data size. Note
5905 that these values will vary depending on the efficiency of the compiler and
5906 the compiler options used during generation.
5909 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
5910 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
5912 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5913 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
5916 2) iASL Compiler/Disassembler:
5918 Implemented support for the ACPI 3.0 Timer operator.
5920 Fixed a problem where the Default() operator was inadvertently ignored in a
5921 Switch/Case block. This was a problem in the translation of the Switch
5922 statement to If...Else pairs.
5924 Added support to allow a standalone Return operator, with no parentheses (or
5927 Fixed a problem with code generation for the ElseIf operator where the
5928 translated Else...If parse tree was improperly constructed leading to the
5931 ----------------------------------------
5932 22 September 2004. Summary of changes for version 20040922:
5934 1) ACPI CA Core Subsystem:
5936 Fixed a problem with the implementation of the LNot() operator where "Ones"
5937 was not returned for the TRUE case. Changed the code to return Ones instead
5938 of (!Arg) which was usually 1. This change affects iASL constant folding for
5941 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was not
5942 initialized properly -- Now zero the entire buffer in this case where the
5943 buffer already exists.
5945 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
5946 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
5947 related code considerably. This will require changes/updates to all OS
5948 interface layers (OSLs.)
5950 Implemented a new external interface, AcpiInstallExceptionHandler, to allow
5951 a system exception handler to be installed. This handler is invoked upon any
5952 run-time exception that occurs during control method execution.
5954 Added support for the DSDT in AcpiTbFindTable. This allows the
5955 DataTableRegion() operator to access the local copy of the DSDT.
5957 Code and Data Size: Current and previous core subsystem library sizes are
5958 shown below. These are the code and data sizes for the acpica.lib produced
5959 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5960 any ACPI driver or OSPM code. The debug version of the code includes the
5961 debug output trace mechanism and has a much larger code and data size. Note
5962 that these values will vary depending on the efficiency of the compiler and
5963 the compiler options used during generation.
5966 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
5967 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
5969 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
5970 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
5973 2) iASL Compiler/Disassembler:
5975 Fixed a problem with constant folding and the LNot operator. LNot was
5976 returning 1 in the TRUE case, not Ones as per the ACPI specification. This
5977 could result in the generation of an incorrect folded/reduced constant.
5979 End-Of-File is now allowed within a "//"-style comment. A parse error no
5980 longer occurs if such a comment is at the very end of the input ASL source
5983 Implemented the "-r" option to override the Revision in the table header.
5984 The initial use of this option will be to simplify the evaluation of the AML
5985 interpreter by allowing a single ASL source module to be compiled for either
5986 32-bit or 64-bit integers.
5989 ----------------------------------------
5990 27 August 2004. Summary of changes for version 20040827:
5992 1) ACPI CA Core Subsystem:
5994 - Implemented support for implicit object conversion in the non-numeric
5995 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual, and
5996 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
5997 the second operand is implicitly converted on the fly to match the type of
5998 the first operand. For example:
6000 LEqual (Source1, Source2)
6002 Source1 and Source2 must each evaluate to an integer, a string, or a buffer.
6003 The data type of Source1 dictates the required type of Source2. Source2 is
6004 implicitly converted if necessary to match the type of Source1.
6006 - Updated and corrected the behavior of the string conversion support. The
6007 rules concerning conversion of buffers to strings (according to the ACPI
6008 specification) are as follows:
6010 ToDecimalString - explicit byte-wise conversion of buffer to string of
6011 decimal values (0-255) separated by commas. ToHexString - explicit byte-wise
6012 conversion of buffer to string of hex values (0-FF) separated by commas.
6013 ToString - explicit byte-wise conversion of buffer to string. Byte-by-byte
6014 copy with no transform except NULL terminated. Any other implicit buffer-to-
6015 string conversion - byte-wise conversion of buffer to string of hex values
6016 (0-FF) separated by spaces.
6018 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
6020 - Fixed a problem in AcpiNsGetPathnameLength where the returned length was
6021 one byte too short in the case of a node in the root scope. This could
6022 cause a fault during debug output.
6024 - Code and Data Size: Current and previous core subsystem library sizes are
6025 shown below. These are the code and data sizes for the acpica.lib produced
6026 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6027 any ACPI driver or OSPM code. The debug version of the code includes the
6028 debug output trace mechanism and has a much larger code and data size. Note
6029 that these values will vary depending on the efficiency of the compiler and
6030 the compiler options used during generation.
6033 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
6034 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
6036 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
6037 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
6040 2) iASL Compiler/Disassembler:
6042 - Fixed a Linux generation error.
6045 ----------------------------------------
6046 16 August 2004. Summary of changes for version 20040816:
6048 1) ACPI CA Core Subsystem:
6050 Designed and implemented support within the AML interpreter for the so-
6051 called "implicit return". This support returns the result of the last ASL
6052 operation within a control method, in the absence of an explicit Return()
6053 operator. A few machines depend on this behavior, even though it is not
6054 explicitly supported by the ASL language. It is optional support that can
6055 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
6057 Removed support for the PCI_Config address space from the internal low level
6058 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
6059 support was not used internally, and would not work correctly anyway because
6060 the PCI bus number and segment number were not supported. There are
6061 separate interfaces for PCI configuration space access because of the unique
6064 Code and Data Size: Current and previous core subsystem library sizes are
6065 shown below. These are the code and data sizes for the acpica.lib produced
6066 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6067 any ACPI driver or OSPM code. The debug version of the code includes the
6068 debug output trace mechanism and has a much larger code and data size. Note
6069 that these values will vary depending on the efficiency of the compiler and
6070 the compiler options used during generation.
6073 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
6074 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
6076 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
6077 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
6080 2) iASL Compiler/Disassembler:
6082 Fixed a problem where constants in ASL expressions at the root level (not
6083 within a control method) could be inadvertently truncated during code
6084 generation. This problem was introduced in the 20040715 release.
6087 ----------------------------------------
6088 15 July 2004. Summary of changes for version 20040715:
6090 1) ACPI CA Core Subsystem:
6092 Restructured the internal HW GPE interfaces to pass/track the current state
6093 of interrupts (enabled/disabled) in order to avoid possible deadlock and
6094 increase flexibility of the interfaces.
6096 Implemented a "lexicographical compare" for String and Buffer objects within
6097 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual --
6098 as per further clarification to the ACPI specification. Behavior is similar
6099 to C library "strcmp".
6101 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
6102 external function. In the 32-bit non-debug case, the stack use has been
6103 reduced from 168 bytes to 32 bytes.
6105 Deployed a new run-time configuration flag, AcpiGbl_EnableInterpreterSlack,
6106 whose purpose is to allow the AML interpreter to forgive certain bad AML
6107 constructs. Default setting is FALSE.
6109 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field IO
6110 support code. If enabled, it allows field access to go beyond the end of a
6111 region definition if the field is within the region length rounded up to the
6112 next access width boundary (a common coding error.)
6114 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
6115 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also, these
6116 symbols are lowercased by the latest version of the AcpiSrc tool.
6118 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
6119 rename "Register" to simply "Reg" to prevent certain compilers from
6122 Code and Data Size: Current and previous core subsystem library sizes are
6123 shown below. These are the code and data sizes for the acpica.lib produced
6124 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6125 any ACPI driver or OSPM code. The debug version of the code includes the
6126 debug output trace mechanism and has a much larger code and data size. Note
6127 that these values will vary depending on the efficiency of the compiler and
6128 the compiler options used during generation.
6131 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
6132 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
6134 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
6135 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
6138 2) iASL Compiler/Disassembler:
6140 Implemented full support for Package objects within the Case() operator.
6141 Note: The Break() operator is currently not supported within Case blocks
6142 (TermLists) as there is some question about backward compatibility with ACPI
6146 Fixed a problem where complex terms were not supported properly within the
6149 Eliminated extraneous warning for compiler-emitted reserved names of the
6150 form "_T_x". (Used in Switch/Case operators.)
6152 Eliminated optimization messages for "_T_x" objects and small constants
6153 within the DefinitionBlock operator.
6156 ----------------------------------------
6157 15 June 2004. Summary of changes for version 20040615:
6159 1) ACPI CA Core Subsystem:
6161 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
6162 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
6165 All directory names in the entire source package are lower case, as they
6166 were in earlier releases.
6168 Implemented "Disassemble" command in the AML debugger that will disassemble
6169 a single control method.
6171 Code and Data Size: Current and previous core subsystem library sizes are
6172 shown below. These are the code and data sizes for the acpica.lib produced
6173 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6174 any ACPI driver or OSPM code. The debug version of the code includes the
6175 debug output trace mechanism and has a much larger code and data size. Note
6176 that these values will vary depending on the efficiency of the compiler and
6177 the compiler options used during generation.
6180 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
6181 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
6184 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
6185 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
6188 2) iASL Compiler/Disassembler:
6190 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
6191 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
6194 All directory names in the entire source package are lower case, as they
6195 were in earlier releases.
6197 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
6200 Fixed an issue with the Windows version of the compiler where later versions
6201 of Windows place the FADT in the registry under the name "FADT" and not
6202 "FACP" as earlier versions did. This applies when using the -g or -
6203 d<nofilename> options. The compiler now looks for both strings as
6206 Fixed a problem with compiler namepath optimization where a namepath within
6207 the Scope() operator could not be optimized if the namepath was a subpath of
6208 the current scope path.
6210 ----------------------------------------
6211 27 May 2004. Summary of changes for version 20040527:
6213 1) ACPI CA Core Subsystem:
6215 Completed a new design and implementation for EBDA (Extended BIOS Data Area)
6216 support in the RSDP scan code. The original code improperly scanned for the
6217 EBDA by simply scanning from memory location 0 to 0x400. The correct method
6218 is to first obtain the EBDA pointer from within the BIOS data area, then
6219 scan 1K of memory starting at the EBDA pointer. There appear to be few if
6220 any machines that place the RSDP in the EBDA, however.
6222 Integrated a fix for a possible fault during evaluation of BufferField
6223 arguments. Obsolete code that was causing the problem was removed.
6225 Found and fixed a problem in the Field Support Code where data could be
6226 corrupted on a bit field read that starts on an aligned boundary but does
6227 not end on an aligned boundary. Merged the read/write "datum length"
6228 calculation code into a common procedure.
6230 Rolled in a couple of changes to the FreeBSD-specific header.
6233 Code and Data Size: Current and previous core subsystem library sizes are
6234 shown below. These are the code and data sizes for the acpica.lib produced
6235 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6236 any ACPI driver or OSPM code. The debug version of the code includes the
6237 debug output trace mechanism and has a much larger code and data size. Note
6238 that these values will vary depending on the efficiency of the compiler and
6239 the compiler options used during generation.
6242 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
6243 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
6245 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
6246 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
6249 2) iASL Compiler/Disassembler:
6251 Fixed a generation warning produced by some overly-verbose compilers for a
6254 ----------------------------------------
6255 14 May 2004. Summary of changes for version 20040514:
6257 1) ACPI CA Core Subsystem:
6259 Fixed a problem where hardware GPE enable bits sometimes not set properly
6260 during and after GPE method execution. Result of 04/27 changes.
6262 Removed extra "clear all GPEs" when sleeping/waking.
6264 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
6265 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above to
6266 the new AcpiEv* calls as appropriate.
6268 ACPI_OS_NAME was removed from the OS-specific headers. The default name is
6269 now "Microsoft Windows NT" for maximum compatibility. However this can be
6270 changed by modifying the acconfig.h file.
6272 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
6273 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
6275 Run _INI methods on ThermalZone objects. This is against the ACPI
6276 specification, but there is apparently ASL code in the field that has these
6277 _INI methods, and apparently "other" AML interpreters execute them.
6279 Performed a full 16/32/64 bit lint that resulted in some small changes.
6281 Added a sleep simulation command to the AML debugger to test sleep code.
6283 Code and Data Size: Current and previous core subsystem library sizes are
6284 shown below. These are the code and data sizes for the acpica.lib produced
6285 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6286 any ACPI driver or OSPM code. The debug version of the code includes the
6287 debug output trace mechanism and has a much larger code and data size. Note
6288 that these values will vary depending on the efficiency of the compiler and
6289 the compiler options used during generation.
6292 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
6293 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
6295 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
6296 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
6298 ----------------------------------------
6299 27 April 2004. Summary of changes for version 20040427:
6301 1) ACPI CA Core Subsystem:
6303 Completed a major overhaul of the GPE handling within ACPI CA. There are
6304 now three types of GPEs: wake-only, runtime-only, and combination wake/run.
6305 The only GPEs allowed to be combination wake/run are for button-style
6306 devices such as a control-method power button, control-method sleep button,
6307 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are not
6308 referenced by any _PRW methods are marked for "runtime" and hardware
6309 enabled. Any GPE that is referenced by a _PRW method is marked for "wake"
6310 (and disabled at runtime). However, at sleep time, only those GPEs that
6311 have been specifically enabled for wake via the AcpiEnableGpe interface will
6312 actually be hardware enabled.
6314 A new external interface has been added, AcpiSetGpeType(), that is meant to
6315 be used by device drivers to force a GPE to a particular type. It will be
6316 especially useful for the drivers for the button devices mentioned above.
6318 Completed restructuring of the ACPI CA initialization sequence so that
6319 default operation region handlers are installed before GPEs are initialized
6320 and the _PRW methods are executed. This will prevent errors when the _PRW
6321 methods attempt to access system memory or I/O space.
6323 GPE enable/disable no longer reads the GPE enable register. We now keep the
6324 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
6325 thus no longer depend on the hardware to maintain these bits.
6327 Always clear the wake status and fixed/GPE status bits before sleep, even
6330 Improved the AML debugger output for displaying the GPE blocks and their
6333 Added new strings for the _OSI method, of the form "Windows 2001 SPx" where
6336 Fixed a problem where the physical address was incorrectly calculated when
6337 the Load() operator was used to directly load from an Operation Region (vs.
6338 loading from a Field object.) Also added check for minimum table length for
6341 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
6344 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
6345 consistency with the other fields returned.
6347 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
6348 structure for each GPE in the system, so the size of this structure is
6351 CPU stack requirement reduction: Cleaned up the method execution and object
6352 evaluation paths so that now a parameter structure is passed, instead of
6353 copying the various method parameters over and over again.
6355 In evregion.c: Correctly exit and reenter the interpreter region if and
6356 only if dispatching an operation region request to a user-installed handler.
6357 Do not exit/reenter when dispatching to a default handler (e.g., default
6358 system memory or I/O handlers)
6361 Notes for updating drivers for the new GPE support. The following changes
6362 must be made to ACPI-related device drivers that are attached to one or more
6363 GPEs: (This information will be added to the ACPI CA Programmer Reference.)
6365 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you must
6366 explicitly call AcpiEnableGpe.
6367 2) There is a new interface called AcpiSetGpeType. This should be called
6368 before enabling the GPE. Also, this interface will automatically disable
6369 the GPE if it is currently enabled.
6370 3) AcpiEnableGpe no longer supports a GPE type flag.
6372 Specific drivers that must be changed:
6374 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
6375 AeGpeHandler, NULL);
6376 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
6377 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
6379 2) Button Drivers (Power, Lid, Sleep):
6380 Run _PRW method under parent device
6381 If _PRW exists: /* This is a control-method button */
6382 Extract GPE number and possibly GpeDevice
6383 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
6384 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
6386 For all other devices that have _PRWs, we automatically set the GPE type to
6387 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled. This
6388 must be done on a selective basis, usually requiring some kind of user app
6389 to allow the user to pick the wake devices.
6392 Code and Data Size: Current and previous core subsystem library sizes are
6393 shown below. These are the code and data sizes for the acpica.lib produced
6394 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6395 any ACPI driver or OSPM code. The debug version of the code includes the
6396 debug output trace mechanism and has a much larger code and data size. Note
6397 that these values will vary depending on the efficiency of the compiler and
6398 the compiler options used during generation.
6401 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
6402 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
6405 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
6406 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
6410 ----------------------------------------
6411 02 April 2004. Summary of changes for version 20040402:
6413 1) ACPI CA Core Subsystem:
6415 Fixed an interpreter problem where an indirect store through an ArgX
6416 parameter was incorrectly applying the "implicit conversion rules" during
6417 the store. From the ACPI specification: "If the target is a method local or
6418 argument (LocalX or ArgX), no conversion is performed and the result is
6419 stored directly to the target". The new behavior is to disable implicit
6420 conversion during ALL stores to an ArgX.
6422 Changed the behavior of the _PRW method scan to ignore any and all errors
6423 returned by a given _PRW. This prevents the scan from aborting from the
6424 failure of any single _PRW.
6426 Moved the runtime configuration parameters from the global init procedure to
6427 static variables in acglobal.h. This will allow the host to override the
6428 default values easily.
6430 Code and Data Size: Current and previous core subsystem library sizes are
6431 shown below. These are the code and data sizes for the acpica.lib produced
6432 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6433 any ACPI driver or OSPM code. The debug version of the code includes the
6434 debug output trace mechanism and has a much larger code and data size. Note
6435 that these values will vary depending on the efficiency of the compiler and
6436 the compiler options used during generation.
6439 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
6440 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
6442 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
6443 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
6446 2) iASL Compiler/Disassembler:
6448 iASL now fully disassembles SSDTs. However, External() statements are not
6449 generated automatically for unresolved symbols at this time. This is a
6450 planned feature for future implementation.
6452 Fixed a scoping problem in the disassembler that occurs when the type of the
6453 target of a Scope() operator is overridden. This problem caused an
6454 incorrectly nested internal namespace to be constructed.
6456 Any warnings or errors that are emitted during disassembly are now commented
6457 out automatically so that the resulting file can be recompiled without any
6460 ----------------------------------------
6461 26 March 2004. Summary of changes for version 20040326:
6463 1) ACPI CA Core Subsystem:
6465 Implemented support for "wake" GPEs via interaction between GPEs and the
6466 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
6467 identified as a WAKE GPE and by default will no longer be enabled at
6468 runtime. Previously, we were blindly enabling all GPEs with a corresponding
6469 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway. We
6470 believe this has been the cause of thousands of "spurious" GPEs on some
6473 This new GPE behavior is can be reverted to the original behavior (enable
6474 ALL GPEs at runtime) via a runtime flag.
6476 Fixed a problem where aliased control methods could not access objects
6477 properly. The proper scope within the namespace was not initialized
6478 (transferred to the target of the aliased method) before executing the
6481 Fixed a potential race condition on internal object deletion on the return
6482 object in AcpiEvaluateObject.
6484 Integrated a fix for resource descriptors where both _MEM and _MTP were
6485 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
6486 wide, 0x0F instead of 0x03.)
6488 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, preventing a
6489 fault in some cases.
6491 Updated Notify() values for debug statements in evmisc.c
6493 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
6495 Code and Data Size: Current and previous core subsystem library sizes are
6496 shown below. These are the code and data sizes for the acpica.lib produced
6497 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6498 any ACPI driver or OSPM code. The debug version of the code includes the
6499 debug output trace mechanism and has a much larger code and data size. Note
6500 that these values will vary depending on the efficiency of the compiler and
6501 the compiler options used during generation.
6505 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
6506 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
6508 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
6509 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
6511 ----------------------------------------
6512 11 March 2004. Summary of changes for version 20040311:
6514 1) ACPI CA Core Subsystem:
6516 Fixed a problem where errors occurring during the parse phase of control
6517 method execution did not abort cleanly. For example, objects created and
6518 installed in the namespace were not deleted. This caused all subsequent
6519 invocations of the method to return the AE_ALREADY_EXISTS exception.
6521 Implemented a mechanism to force a control method to "Serialized" execution
6522 if the method attempts to create namespace objects. (The root of the
6523 AE_ALREADY_EXISTS problem.)
6525 Implemented support for the predefined _OSI "internal" control method.
6526 Initial supported strings are "Linux", "Windows 2000", "Windows 2001", and
6527 "Windows 2001.1", and can be easily upgraded for new strings as necessary.
6528 This feature will allow "other" operating systems to execute the fully
6529 tested, "Windows" code path through the ASL code
6531 Global Lock Support: Now allows multiple acquires and releases with any
6532 internal thread. Removed concept of "owning thread" for this special mutex.
6534 Fixed two functions that were inappropriately declaring large objects on the
6535 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage during
6536 method execution considerably.
6538 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
6539 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
6541 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
6542 defined on the machine.
6544 Implemented two runtime options: One to force all control method execution
6545 to "Serialized" to mimic Windows behavior, another to disable _OSI support
6546 if it causes problems on a given machine.
6548 Code and Data Size: Current and previous core subsystem library sizes are
6549 shown below. These are the code and data sizes for the acpica.lib produced
6550 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
6551 any ACPI driver or OSPM code. The debug version of the code includes the
6552 debug output trace mechanism and has a much larger code and data size. Note
6553 that these values will vary depending on the efficiency of the compiler and
6554 the compiler options used during generation.
6557 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
6558 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
6560 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
6561 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
6563 2) iASL Compiler/Disassembler:
6565 Fixed an array size problem for FreeBSD that would cause the compiler to
6568 ----------------------------------------
6569 20 February 2004. Summary of changes for version 20040220:
6572 1) ACPI CA Core Subsystem:
6574 Implemented execution of _SxD methods for Device objects in the
6575 GetObjectInfo interface.
6577 Fixed calls to _SST method to pass the correct arguments.
6579 Added a call to _SST on wake to restore to "working" state.
6581 Check for End-Of-Buffer failure case in the WalkResources interface.
6583 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
6584 structures to the beginning of the file.
6586 After wake, clear GPE status register(s) before enabling GPEs.
6588 After wake, clear/enable power button. (Perhaps we should clear/enable all
6589 fixed events upon wake.)
6591 Fixed a couple of possible memory leaks in the Namespace manager.
6593 Integrated latest acnetbsd.h file.
6595 ----------------------------------------
6596 11 February 2004. Summary of changes for version 20040211:
6599 1) ACPI CA Core Subsystem:
6601 Completed investigation and implementation of the call-by-reference
6602 mechanism for control method arguments.
6604 Fixed a problem where a store of an object into an indexed package could
6605 fail if the store occurs within a different method than the method that
6606 created the package.
6608 Fixed a problem where the ToDecimal operator could return incorrect results.
6610 Fixed a problem where the CopyObject operator could fail on some of the more
6611 obscure objects (e.g., Reference objects.)
6613 Improved the output of the Debug object to display buffer, package, and
6616 Fixed a problem where constructs of the form "RefOf (ArgX)" did not return
6617 the expected result.
6619 Added permanent ACPI_REPORT_ERROR macros for all instances of the
6620 ACPI_AML_INTERNAL exception.
6622 Integrated latest version of acfreebsd.h
6624 ----------------------------------------
6625 16 January 2004. Summary of changes for version 20040116:
6627 The purpose of this release is primarily to update the copyright years in
6628 each module, thus causing a huge number of diffs. There are a few small
6629 functional changes, however.
6631 1) ACPI CA Core Subsystem:
6633 Improved error messages when there is a problem finding one or more of the
6634 required base ACPI tables
6636 Reintroduced the definition of APIC_HEADER in actbl.h
6638 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
6640 Removed extraneous reference to NewObj in dsmthdat.c
6644 Fixed a problem introduced in December that disabled the correct disassembly
6645 of Resource Templates
6648 ----------------------------------------
6649 03 December 2003. Summary of changes for version 20031203:
6651 1) ACPI CA Core Subsystem:
6653 Changed the initialization of Operation Regions during subsystem
6654 init to perform two entire walks of the ACPI namespace; The first
6655 to initialize the regions themselves, the second to execute the
6656 _REG methods. This fixed some interdependencies across _REG
6657 methods found on some machines.
6659 Fixed a problem where a Store(Local0, Local1) could simply update
6660 the object reference count, and not create a new copy of the
6661 object if the Local1 is uninitialized.
6663 Implemented support for the _SST reserved method during sleep
6666 Implemented support to clear the SLP_TYP and SLP_EN bits when
6667 waking up, this is apparently required by some machines.
6669 When sleeping, clear the wake status only if SleepState is not S5.
6671 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
6672 pointer arithmetic advanced a string pointer too far.
6674 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
6675 could be returned if the requested table has not been loaded.
6677 Within the support for IRQ resources, restructured the handling of
6678 the active and edge/level bits.
6680 Fixed a few problems in AcpiPsxExecute() where memory could be
6681 leaked under certain error conditions.
6683 Improved error messages for the cases where the ACPI mode could
6686 Code and Data Size: Current and previous core subsystem library
6687 sizes are shown below. These are the code and data sizes for the
6688 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
6689 these values do not include any ACPI driver or OSPM code. The
6690 debug version of the code includes the debug output trace
6691 mechanism and has a much larger code and data size. Note that
6692 these values will vary depending on the efficiency of the compiler
6693 and the compiler options used during generation.
6695 Previous Release (20031029):
6696 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
6697 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
6699 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
6700 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
6702 2) iASL Compiler/Disassembler:
6704 Implemented a fix for the iASL disassembler where a bad index was
6705 generated. This was most noticeable on 64-bit platforms
6708 ----------------------------------------
6709 29 October 2003. Summary of changes for version 20031029:
6711 1) ACPI CA Core Subsystem:
6714 Fixed a problem where a level-triggered GPE with an associated
6715 _Lxx control method was incorrectly cleared twice.
6717 Fixed a problem with the Field support code where an access can
6718 occur beyond the end-of-region if the field is non-aligned but
6719 extends to the very end of the parent region (resulted in an
6720 AE_AML_REGION_LIMIT exception.)
6722 Fixed a problem with ACPI Fixed Events where an RT Clock handler
6723 would not get invoked on an RTC event. The RTC event bitmasks for
6724 the PM1 registers were not being initialized properly.
6726 Implemented support for executing _STA and _INI methods for
6727 Processor objects. Although this is currently not part of the
6728 ACPI specification, there is existing ASL code that depends on the
6729 init-time execution of these methods.
6731 Implemented and deployed a GetDescriptorName function to decode
6732 the various types of internal descriptors. Guards against null
6733 descriptors during debug output also.
6735 Implemented and deployed a GetNodeName function to extract the 4-
6736 character namespace node name. This function simplifies the debug
6737 and error output, as well as guarding against null pointers during
6740 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
6741 simplify the debug and error output of 64-bit integers. This
6742 macro replaces the HIDWORD and LODWORD macros for dumping these
6745 Updated the implementation of the Stall() operator to only call
6746 AcpiOsStall(), and also return an error if the operand is larger
6747 than 255. This preserves the required behavior of not
6748 relinquishing the processor, as would happen if AcpiOsSleep() was
6749 called for "long stalls".
6751 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
6752 initialized are now treated as NOOPs.
6754 Cleaned up a handful of warnings during 64-bit generation.
6756 Fixed a reported error where and incorrect GPE number was passed
6757 to the GPE dispatch handler. This value is only used for error
6758 output, however. Used this opportunity to clean up and streamline
6759 the GPE dispatch code.
6761 Code and Data Size: Current and previous core subsystem library
6762 sizes are shown below. These are the code and data sizes for the
6763 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
6764 these values do not include any ACPI driver or OSPM code. The
6766 debug version of the code includes the debug output trace
6767 mechanism and has a much larger code and data size. Note that
6768 these values will vary depending on the efficiency of the compiler
6769 and the compiler options used during generation.
6771 Previous Release (20031002):
6772 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
6773 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
6775 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
6776 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
6779 2) iASL Compiler/Disassembler:
6781 Updated the iASL compiler to return an error if the operand to the
6782 Stall() operator is larger than 255.
6785 ----------------------------------------
6786 02 October 2003. Summary of changes for version 20031002:
6789 1) ACPI CA Core Subsystem:
6791 Fixed a problem with Index Fields where the index was not
6792 incremented for fields that require multiple writes to the
6793 index/data registers (Fields that are wider than the data
6796 Fixed a problem with all Field objects where a write could go
6797 beyond the end-of-field if the field was larger than the access
6798 granularity and therefore required multiple writes to complete the
6799 request. An extra write beyond the end of the field could happen
6802 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
6803 would incorrectly be returned if the width of the Data Register
6804 was larger than the specified field access width.
6806 Completed fixes for LoadTable() and Unload() and verified their
6807 operation. Implemented full support for the "DdbHandle" object
6808 throughout the ACPI CA subsystem.
6810 Implemented full support for the MADT and ECDT tables in the ACPI
6811 CA header files. Even though these tables are not directly
6812 consumed by ACPI CA, the header definitions are useful for ACPI
6815 Integrated resource descriptor fixes posted to the Linux ACPI
6816 list. This included checks for minimum descriptor length, and
6817 support for trailing NULL strings within descriptors that have
6818 optional string elements.
6820 Code and Data Size: Current and previous core subsystem library
6821 sizes are shown below. These are the code and data sizes for the
6822 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
6823 these values do not include any ACPI driver or OSPM code. The
6824 debug version of the code includes the debug output trace
6825 mechanism and has a much larger code and data size. Note that
6826 these values will vary depending on the efficiency of the compiler
6827 and the compiler options used during generation.
6829 Previous Release (20030918):
6830 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
6831 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
6833 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
6834 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
6839 Implemented detection of non-ASCII characters within the input
6840 source ASL file. This catches attempts to compile binary (AML)
6841 files early in the compile, with an informative error message.
6843 Fixed a problem where the disassembler would fault if the output
6844 filename could not be generated or if the output file could not be
6847 ----------------------------------------
6848 18 September 2003. Summary of changes for version 20030918:
6851 1) ACPI CA Core Subsystem:
6853 Found and fixed a longstanding problem with the late execution of
6854 the various deferred AML opcodes (such as Operation Regions,
6855 Buffer Fields, Buffers, and Packages). If the name string
6856 specified for the name of the new object placed the object in a
6857 scope other than the current scope, the initialization/execution
6858 of the opcode failed. The solution to this problem was to
6859 implement a mechanism where the late execution of such opcodes
6860 does not attempt to lookup/create the name a second time in an
6861 incorrect scope. This fixes the "region size computed
6862 incorrectly" problem.
6864 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
6865 Global Lock AE_BAD_PARAMETER error.
6867 Fixed several 64-bit issues with prototypes, casting and data
6870 Removed duplicate prototype from acdisasm.h
6872 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
6874 Code and Data Size: Current and previous core subsystem library
6875 sizes are shown below. These are the code and data sizes for the
6876 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
6877 these values do not include any ACPI driver or OSPM code. The
6878 debug version of the code includes the debug output trace
6879 mechanism and has a much larger code and data size. Note that
6880 these values will vary depending on the efficiency of the compiler
6881 and the compiler options used during generation.
6885 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
6886 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
6888 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
6889 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
6894 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
6895 correct sleep time in seconds.
6897 ----------------------------------------
6898 14 July 2003. Summary of changes for version 20030619:
6900 1) ACPI CA Core Subsystem:
6902 Parse SSDTs in order discovered, as opposed to reverse order
6905 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
6912 Dynamically allocate SDT list (suggested by Andi Kleen)
6914 proc function return value cleanups (Andi Kleen)
6916 Correctly handle NMI watchdog during long stalls (Andrew Morton)
6918 Make it so acpismp=force works (reported by Andrew Morton)
6921 ----------------------------------------
6922 19 June 2003. Summary of changes for version 20030619:
6924 1) ACPI CA Core Subsystem:
6926 Fix To/FromBCD, eliminating the need for an arch-specific #define.
6928 Do not acquire a semaphore in the S5 shutdown path.
6930 Fix ex_digits_needed for 0. (Takayoshi Kochi)
6932 Fix sleep/stall code reversal. (Andi Kleen)
6934 Revert a change having to do with control method calling
6939 acpiphp update (Takayoshi Kochi)
6941 Export acpi_disabled for sonypi (Stelian Pop)
6943 Mention acpismp=force in config help
6945 Re-add acpitable.c and acpismp=force. This improves backwards
6947 compatibility and also cleans up the code to a significant degree.
6949 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
6951 ----------------------------------------
6952 22 May 2003. Summary of changes for version 20030522:
6954 1) ACPI CA Core Subsystem:
6956 Found and fixed a reported problem where an AE_NOT_FOUND error
6957 occurred occasionally during _BST evaluation. This turned out to
6958 be an Owner ID allocation issue where a called method did not get
6959 a new ID assigned to it. Eventually, (after 64k calls), the Owner
6960 ID UINT16 would wraparound so that the ID would be the same as the
6961 caller's and the called method would delete the caller's
6964 Implemented extended error reporting for control methods that are
6965 aborted due to a run-time exception. Output includes the exact
6966 AML instruction that caused the method abort, a dump of the method
6967 locals and arguments at the time of the abort, and a trace of all
6968 nested control method calls.
6970 Modified the interpreter to allow the creation of buffers of zero
6971 length from the AML code. Implemented new code to ensure that no
6972 attempt is made to actually allocate a memory buffer (of length
6973 zero) - instead, a simple buffer object with a NULL buffer pointer
6974 and length zero is created. A warning is no longer issued when
6975 the AML attempts to create a zero-length buffer.
6977 Implemented a workaround for the "leading asterisk issue" in
6978 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
6979 asterisk is automatically removed if present in any HID, UID, or
6980 CID strings. The iASL compiler will still flag this asterisk as
6983 Implemented full support for _CID methods that return a package of
6984 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
6985 now additionally returns a device _CID list if present. This
6986 required a change to the external interface in order to pass an
6987 ACPI_BUFFER object as a parameter since the _CID list is of
6990 Fixed a problem with the new AE_SAME_HANDLER exception where
6991 handler initialization code did not know about this exception.
6993 Code and Data Size: Current and previous core subsystem library
6994 sizes are shown below. These are the code and data sizes for the
6995 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
6996 these values do not include any ACPI driver or OSPM code. The
6997 debug version of the code includes the debug output trace
6998 mechanism and has a much larger code and data size. Note that
6999 these values will vary depending on the efficiency of the compiler
7000 and the compiler options used during generation.
7002 Previous Release (20030509):
7003 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
7004 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
7006 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
7007 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
7012 Fixed a bug in which we would reinitialize the ACPI interrupt
7013 after it was already working, thus disabling all ACPI and the IRQs
7014 for any other device sharing the interrupt. (Thanks to Stian
7017 Toshiba driver update (John Belmonte)
7019 Return only 0 or 1 for our interrupt handler status (Andrew
7025 Fixed a reported problem where multiple (nested) ElseIf()
7026 statements were not handled correctly by the compiler, resulting
7027 in incorrect warnings and incorrect AML code. This was a problem
7028 in both the ASL parser and the code generator.
7033 Added changes to existing interfaces, new exception codes, and new
7034 text concerning reference count object management versus garbage
7037 ----------------------------------------
7038 09 May 2003. Summary of changes for version 20030509.
7041 1) ACPI CA Core Subsystem:
7043 Changed the subsystem initialization sequence to hold off
7044 installation of address space handlers until the hardware has been
7045 initialized and the system has entered ACPI mode. This is because
7046 the installation of space handlers can cause _REG methods to be
7047 run. Previously, the _REG methods could potentially be run before
7048 ACPI mode was enabled.
7050 Fixed some memory leak issues related to address space handler and
7051 notify handler installation. There were some problems with the
7052 reference count mechanism caused by the fact that the handler
7053 objects are shared across several namespace objects.
7055 Fixed a reported problem where reference counts within the
7056 namespace were not properly updated when named objects created by
7057 method execution were deleted.
7059 Fixed a reported problem where multiple SSDTs caused a deletion
7060 issue during subsystem termination. Restructured the table data
7061 structures to simplify the linked lists and the related code.
7063 Fixed a problem where the table ID associated with secondary
7064 tables (SSDTs) was not being propagated into the namespace objects
7065 created by those tables. This would only present a problem for
7066 tables that are unloaded at run-time, however.
7068 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
7069 type as the length parameter (instead of UINT32).
7071 Solved a long-standing problem where an ALREADY_EXISTS error
7072 appears on various systems. This problem could happen when there
7073 are multiple PCI_Config operation regions under a single PCI root
7074 bus. This doesn't happen very frequently, but there are some
7075 systems that do this in the ASL.
7077 Fixed a reported problem where the internal DeleteNode function
7078 was incorrectly handling the case where a namespace node was the
7079 first in the parent's child list, and had additional peers (not
7080 the only child, but first in the list of children.)
7082 Code and Data Size: Current core subsystem library sizes are shown
7083 below. These are the code and data sizes for the acpica.lib
7084 produced by the Microsoft Visual C++ 6.0 compiler, and these
7085 values do not include any ACPI driver or OSPM code. The debug
7086 version of the code includes the debug output trace mechanism and
7087 has a much larger code and data size. Note that these values will
7088 vary depending on the efficiency of the compiler and the compiler
7089 options used during generation.
7092 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
7093 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
7095 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
7096 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
7101 Allow ":" in OS override string (Ducrot Bruno)
7103 Kobject fix (Greg KH)
7106 3 iASL Compiler/Disassembler:
7108 Fixed a problem in the generation of the C source code files (AML
7109 is emitted in C source statements for BIOS inclusion) where the
7110 Ascii dump that appears within a C comment at the end of each line
7111 could cause a compile time error if the AML sequence happens to
7112 have an open comment or close comment sequence embedded.
7115 ----------------------------------------
7116 24 April 2003. Summary of changes for version 20030424.
7119 1) ACPI CA Core Subsystem:
7121 Support for big-endian systems has been implemented. Most of the
7122 support has been invisibly added behind big-endian versions of the
7125 Fixed a problem in AcpiHwDisableGpeBlock() and
7126 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
7127 low level hardware write routine. The offset parameter was
7128 actually eliminated from the low level read/write routines because
7129 they had become obsolete.
7131 Fixed a problem where a handler object was deleted twice during
7132 the removal of a fixed event handler.
7137 A fix for SMP systems with link devices was contributed by
7141 (2.5) Return whether we handled the interrupt in our IRQ handler.
7142 (Linux ISRs no longer return void, so we can propagate the handler
7143 return value from the ACPI CA core back to the OS.)
7149 The ACPI CA Programmer Reference has been updated to reflect new
7150 interfaces and changes to existing interfaces.
7152 ----------------------------------------
7153 28 March 2003. Summary of changes for version 20030328.
7155 1) ACPI CA Core Subsystem:
7157 The GPE Block Device support has been completed. New interfaces
7158 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
7159 interfaces (enable, disable, clear, getstatus) have been split
7160 into separate interfaces for Fixed Events and General Purpose
7161 Events (GPEs) in order to support GPE Block Devices properly.
7163 Fixed a problem where the error message "Failed to acquire
7164 semaphore" would appear during operations on the embedded
7167 Code and Data Size: Current core subsystem library sizes are shown
7168 below. These are the code and data sizes for the acpica.lib
7169 produced by the Microsoft Visual C++ 6.0 compiler, and these
7170 values do not include any ACPI driver or OSPM code. The debug
7171 version of the code includes the debug output trace mechanism and
7172 has a much larger code and data size. Note that these values will
7173 vary depending on the efficiency of the compiler and the compiler
7174 options used during generation.
7177 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
7178 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
7180 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
7181 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
7184 ----------------------------------------
7185 28 February 2003. Summary of changes for version 20030228.
7188 1) ACPI CA Core Subsystem:
7190 The GPE handling and dispatch code has been completely overhauled
7191 in preparation for support of GPE Block Devices (ID ACPI0006).
7192 This affects internal data structures and code only; there should
7193 be no differences visible externally. One new file has been
7196 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
7197 fields that are used to determine the GPE block lengths. The
7198 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
7199 structures are ignored. This is per the ACPI specification but it
7200 isn't very clear. The full 256 Block 0/1 GPEs are now supported
7201 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
7203 In the SCI interrupt handler, removed the read of the PM1_CONTROL
7204 register to look at the SCI_EN bit. On some machines, this read
7205 causes an SMI event and greatly slows down SCI events. (This may
7206 in fact be the cause of slow battery status response on some
7209 Fixed a problem where a store of a NULL string to a package object
7210 could cause the premature deletion of the object. This was seen
7211 during execution of the battery _BIF method on some systems,
7212 resulting in no battery data being returned.
7214 Added AcpiWalkResources interface to simplify parsing of resource
7217 Code and Data Size: Current core subsystem library sizes are shown
7218 below. These are the code and data sizes for the acpica.lib
7219 produced by the Microsoft Visual C++ 6.0 compiler, and these
7220 values do not include any ACPI driver or OSPM code. The debug
7221 version of the code includes the debug output trace mechanism and
7222 has a much larger code and data size. Note that these values will
7223 vary depending on the efficiency of the compiler and the compiler
7224 options used during generation.
7227 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
7228 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
7230 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
7231 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
7236 S3 fixes (Ole Rohne)
7238 Update ACPI PHP driver with to use new acpi_walk_resource API
7241 Add S4BIOS support (Pavel Machek)
7243 Map in entire table before performing checksum (John Stultz)
7245 Expand the mem= cmdline to allow the specification of reserved and
7246 ACPI DATA blocks (Pavel Machek)
7248 Never use ACPI on VISWS
7250 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
7252 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
7253 causing us to think that some systems support C2 when they really
7256 Do not count processor objects for non-present CPUs (Thanks to
7262 Fixed a problem where ASL include files could not be found and
7265 Added support for the _PDC reserved name.
7268 ----------------------------------------
7269 22 January 2003. Summary of changes for version 20030122.
7272 1) ACPI CA Core Subsystem:
7274 Added a check for constructs of the form: Store (Local0, Local0)
7275 where Local0 is not initialized. Apparently, some BIOS
7276 programmers believe that this is a NOOP. Since this store doesn't
7277 do anything anyway, the new prototype behavior will ignore this
7278 error. This is a case where we can relax the strict checking in
7279 the interpreter in the name of compatibility.
7284 The AcpiSrc Source Conversion Utility has been released with the
7285 Linux package for the first time. This is the utility that is
7286 used to convert the ACPI CA base source code to the Linux version.
7288 (Both) Handle P_BLK lengths shorter than 6 more gracefully
7290 (Both) Move more headers to include/acpi, and delete an unused
7293 (Both) Move drivers/acpi/include directory to include/acpi
7295 (Both) Boot functions don't use cmdline, so don't pass it around
7297 (Both) Remove include of unused header (Adrian Bunk)
7299 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
7301 former now also includes the latter, acpiphp.h only needs the one,
7304 (2.5) Make it possible to select method of bios restoring after S3
7305 resume. [=> no more ugly ifdefs] (Pavel Machek)
7307 (2.5) Make proc write interfaces work (Pavel Machek)
7309 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
7311 (2.5) Break out ACPI Perf code into its own module, under cpufreq
7314 (2.4) S4BIOS support (Ducrot Bruno)
7316 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
7322 Added support to disassemble SSDT and PSDTs.
7324 Implemented support to obtain SSDTs from the Windows registry if
7328 ----------------------------------------
7329 09 January 2003. Summary of changes for version 20030109.
7331 1) ACPI CA Core Subsystem:
7333 Changed the behavior of the internal Buffer-to-String conversion
7334 function. The current ACPI specification states that the contents
7335 of the buffer are "converted to a string of two-character
7336 hexadecimal numbers, each separated by a space". Unfortunately,
7337 this definition is not backwards compatible with existing ACPI 1.0
7338 implementations (although the behavior was not defined in the ACPI
7339 1.0 specification). The new behavior simply copies data from the
7340 buffer to the string until a null character is found or the end of
7341 the buffer is reached. The new String object is always null
7342 terminated. This problem was seen during the generation of _BIF
7343 battery data where incorrect strings were returned for battery
7344 type, etc. This will also require an errata to the ACPI
7347 Renamed all instances of NATIVE_UINT and NATIVE_INT to
7348 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
7350 Copyright in all module headers (both Linux and non-Linux) has be
7353 Code and Data Size: Current core subsystem library sizes are shown
7354 below. These are the code and data sizes for the acpica.lib
7355 produced by the Microsoft Visual C++ 6.0 compiler, and these
7356 values do not include any ACPI driver or OSPM code. The debug
7357 version of the code includes the debug output trace mechanism and
7358 has a much larger code and data size. Note that these values will
7359 vary depending on the efficiency of the compiler and the compiler
7360 options used during generation.
7363 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
7364 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
7366 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
7367 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
7372 Fixed an oops on module insertion/removal (Matthew Tippett)
7374 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
7376 (2.5) Replace pr_debug (Randy Dunlap)
7378 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
7380 (Both) Eliminate spawning of thread from timer callback, in favor
7383 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
7385 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
7387 (Both) Add missing statics to button.c (Pavel Machek)
7389 Several changes have been made to the source code translation
7390 utility that generates the Linux Code in order to make the code
7393 All typedefs on structs and unions have been removed in keeping
7394 with the Linux coding style.
7396 Removed the non-Linux SourceSafe module revision number from each
7399 Completed major overhaul of symbols to be lowercased for linux.
7400 Doubled the number of symbols that are lowercased.
7402 Fixed a problem where identifiers within procedure headers and
7403 within quotes were not fully lower cased (they were left with a
7406 Some C macros whose only purpose is to allow the generation of 16-
7407 bit code are now completely removed in the Linux code, increasing
7408 readability and maintainability.
7410 ----------------------------------------
7412 12 December 2002. Summary of changes for version 20021212.
7415 1) ACPI CA Core Subsystem:
7417 Fixed a problem where the creation of a zero-length AML Buffer
7418 would cause a fault.
7420 Fixed a problem where a Buffer object that pointed to a static AML
7421 buffer (in an ACPI table) could inadvertently be deleted, causing
7424 Fixed a problem where a user buffer (passed in to the external
7425 ACPI CA interfaces) could be overwritten if the buffer was too
7426 small to complete the operation, causing memory corruption.
7428 Fixed a problem in the Buffer-to-String conversion code where a
7429 string of length one was always returned, regardless of the size
7430 of the input Buffer object.
7432 Removed the NATIVE_CHAR data type across the entire source due to
7433 lack of need and lack of consistent use.
7435 Code and Data Size: Current core subsystem library sizes are shown
7436 below. These are the code and data sizes for the acpica.lib
7437 produced by the Microsoft Visual C++ 6.0 compiler, and these
7438 values do not include any ACPI driver or OSPM code. The debug
7439 version of the code includes the debug output trace mechanism and
7440 has a much larger code and data size. Note that these values will
7441 vary depending on the efficiency of the compiler and the compiler
7442 options used during generation.
7445 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
7446 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
7448 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
7449 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
7452 ----------------------------------------
7453 05 December 2002. Summary of changes for version 20021205.
7455 1) ACPI CA Core Subsystem:
7457 Fixed a problem where a store to a String or Buffer object could
7458 cause corruption of the DSDT if the object type being stored was
7459 the same as the target object type and the length of the object
7460 being stored was equal to or smaller than the original (existing)
7461 target object. This was seen to cause corruption of battery _BIF
7462 buffers if the _BIF method modified the buffer on the fly.
7464 Fixed a problem where an internal error was generated if a control
7465 method invocation was used in an OperationRegion, Buffer, or
7466 Package declaration. This was caused by the deferred parsing of
7467 the control method and thus the deferred creation of the internal
7468 method object. The solution to this problem was to create the
7469 internal method object at the moment the method is encountered in
7470 the first pass - so that subsequent references to the method will
7471 able to obtain the required parameter count and thus properly
7472 parse the method invocation. This problem presented itself as an
7473 AE_AML_INTERNAL during the pass 1 parse phase during table load.
7475 Fixed a problem where the internal String object copy routine did
7476 not always allocate sufficient memory for the target String object
7477 and caused memory corruption. This problem was seen to cause
7478 "Allocation already present in list!" errors as memory allocation
7481 Implemented a new function for the evaluation of namespace objects
7482 that allows the specification of the allowable return object
7483 types. This simplifies a lot of code that checks for a return
7484 object of one or more specific objects returned from the
7485 evaluation (such as _STA, etc.) This may become and external
7486 function if it would be useful to ACPI-related drivers.
7488 Completed another round of prefixing #defines with "ACPI_" for
7491 Completed additional code restructuring to allow more modular
7492 linking for iASL compiler and AcpiExec. Several files were split
7493 creating new files. New files: nsparse.c dsinit.c evgpe.c
7495 Implemented an abort mechanism to terminate an executing control
7496 method via the AML debugger. This feature is useful for debugging
7497 control methods that depend (wait) for specific hardware
7500 Code and Data Size: Current core subsystem library sizes are shown
7501 below. These are the code and data sizes for the acpica.lib
7502 produced by the Microsoft Visual C++ 6.0 compiler, and these
7503 values do not include any ACPI driver or OSPM code. The debug
7504 version of the code includes the debug output trace mechanism and
7505 has a much larger code and data size. Note that these values will
7506 vary depending on the efficiency of the compiler and the compiler
7507 options used during generation.
7510 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
7511 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
7513 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
7514 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
7517 2) iASL Compiler/Disassembler
7519 Fixed a compiler code generation problem for "Interrupt" Resource
7520 Descriptors. If specified in the ASL, the optional "Resource
7521 Source Index" and "Resource Source" fields were not inserted into
7522 the correct location within the AML resource descriptor, creating
7523 an invalid descriptor.
7525 Fixed a disassembler problem for "Interrupt" resource descriptors.
7526 The optional "Resource Source Index" and "Resource Source" fields
7530 ----------------------------------------
7531 22 November 2002. Summary of changes for version 20021122.
7534 1) ACPI CA Core Subsystem:
7536 Fixed a reported problem where an object stored to a Method Local
7537 or Arg was not copied to a new object during the store - the
7538 object pointer was simply copied to the Local/Arg. This caused
7539 all subsequent operations on the Local/Arg to also affect the
7540 original source of the store operation.
7542 Fixed a problem where a store operation to a Method Local or Arg
7543 was not completed properly if the Local/Arg contained a reference
7544 (from RefOf) to a named field. The general-purpose store-to-
7545 namespace-node code is now used so that this case is handled
7548 Fixed a problem where the internal object copy routine would cause
7549 a protection fault if the object being copied was a Package and
7550 contained either 1) a NULL package element or 2) a nested sub-
7553 Fixed a problem with the GPE initialization that resulted from an
7554 ambiguity in the ACPI specification. One section of the
7555 specification states that both the address and length of the GPE
7556 block must be zero if the block is not supported. Another section
7557 implies that only the address need be zero if the block is not
7558 supported. The code has been changed so that both the address and
7559 the length must be non-zero to indicate a valid GPE block (i.e.,
7560 if either the address or the length is zero, the GPE block is
7563 Code and Data Size: Current core subsystem library sizes are shown
7564 below. These are the code and data sizes for the acpica.lib
7565 produced by the Microsoft Visual C++ 6.0 compiler, and these
7566 values do not include any ACPI driver or OSPM code. The debug
7567 version of the code includes the debug output trace mechanism and
7568 has a much larger code and data size. Note that these values will
7569 vary depending on the efficiency of the compiler and the compiler
7570 options used during generation.
7573 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
7574 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
7576 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
7577 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
7582 Cleaned up EC driver. Exported an external EC read/write
7583 interface. By going through this, other drivers (most notably
7584 sonypi) will be able to serialize access to the EC.
7587 3) iASL Compiler/Disassembler
7589 Implemented support to optionally generate include files for both
7590 ASM and C (the -i switch). This simplifies BIOS development by
7591 automatically creating include files that contain external
7592 declarations for the symbols that are created within the
7594 (optionally generated) ASM and C AML source files.
7597 ----------------------------------------
7598 15 November 2002. Summary of changes for version 20021115.
7600 1) ACPI CA Core Subsystem:
7602 Fixed a memory leak problem where an error during resolution of
7604 method arguments during a method invocation from another method
7605 failed to cleanup properly by deleting all successfully resolved
7608 Fixed a problem where the target of the Index() operator was not
7609 correctly constructed if the source object was a package. This
7610 problem has not been detected because the use of a target operand
7611 with Index() is very rare.
7613 Fixed a problem with the Index() operator where an attempt was
7614 made to delete the operand objects twice.
7616 Fixed a problem where an attempt was made to delete an operand
7617 twice during execution of the CondRefOf() operator if the target
7620 Implemented the first of perhaps several internal create object
7621 functions that create and initialize a specific object type. This
7622 consolidates duplicated code wherever the object is created, thus
7623 shrinking the size of the subsystem.
7625 Implemented improved debug/error messages for errors that occur
7626 during nested method invocations. All executing method pathnames
7627 are displayed (with the error) as the call stack is unwound - thus
7630 Fixed a problem introduced in the 10/02 release that caused
7631 premature deletion of a buffer object if a buffer was used as an
7632 ASL operand where an integer operand is required (Thus causing an
7633 implicit object conversion from Buffer to Integer.) The change in
7634 the 10/02 release was attempting to fix a memory leak (albeit
7637 Code and Data Size: Current core subsystem library sizes are shown
7638 below. These are the code and data sizes for the acpica.lib
7639 produced by the Microsoft Visual C++ 6.0 compiler, and these
7640 values do not include any ACPI driver or OSPM code. The debug
7641 version of the code includes the debug output trace mechanism and
7642 has a much larger code and data size. Note that these values will
7643 vary depending on the efficiency of the compiler and the compiler
7644 options used during generation.
7647 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
7648 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
7650 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
7651 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
7656 Changed the implementation of the ACPI semaphores to use down()
7657 instead of down_interruptable(). It is important that the
7658 execution of ACPI control methods not be interrupted by signals.
7659 Methods must run to completion, or the system may be left in an
7660 unknown/unstable state.
7662 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
7666 3) iASL Compiler/Disassembler
7669 Changed the default location of output files. All output files
7670 are now placed in the current directory by default instead of in
7671 the directory of the source file. This change may affect some
7672 existing makefiles, but it brings the behavior of the compiler in
7673 line with other similar tools. The location of the output files
7674 can be overridden with the -p command line switch.
7677 ----------------------------------------
7678 11 November 2002. Summary of changes for version 20021111.
7681 0) ACPI Specification 2.0B is released and is now available at:
7682 http://www.acpi.info/index.html
7685 1) ACPI CA Core Subsystem:
7687 Implemented support for the ACPI 2.0 SMBus Operation Regions.
7688 This includes the early detection and handoff of the request to
7689 the SMBus region handler (avoiding all of the complex field
7690 support code), and support for the bidirectional return packet
7691 from an SMBus write operation. This paves the way for the
7692 development of SMBus drivers in each host operating system.
7694 Fixed a problem where the semaphore WAIT_FOREVER constant was
7695 defined as 32 bits, but must be 16 bits according to the ACPI
7696 specification. This had the side effect of causing ASL
7697 Mutex/Event timeouts even though the ASL code requested a wait
7698 forever. Changed all internal references to the ACPI timeout
7699 parameter to 16 bits to prevent future problems. Changed the name
7700 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
7702 Code and Data Size: Current core subsystem library sizes are shown
7703 below. These are the code and data sizes for the acpica.lib
7704 produced by the Microsoft Visual C++ 6.0 compiler, and these
7705 values do not include any ACPI driver or OSPM code. The debug
7706 version of the code includes the debug output trace mechanism and
7707 has a much larger code and data size. Note that these values will
7708 vary depending on the efficiency of the compiler and the compiler
7709 options used during generation.
7712 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
7713 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
7715 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
7716 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
7721 Module loading/unloading fixes (John Cagle)
7724 3) iASL Compiler/Disassembler
7726 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
7728 Implemented support for the disassembly of all SMBus protocol
7729 keywords (SMBQuick, SMBWord, etc.)
7731 ----------------------------------------
7732 01 November 2002. Summary of changes for version 20021101.
7735 1) ACPI CA Core Subsystem:
7737 Fixed a problem where platforms that have a GPE1 block but no GPE0
7738 block were not handled correctly. This resulted in a "GPE
7739 overlap" error message. GPE0 is no longer required.
7741 Removed code added in the previous release that inserted nodes
7742 into the namespace in alphabetical order. This caused some side-
7743 effects on various machines. The root cause of the problem is
7744 still under investigation since in theory, the internal ordering
7745 of the namespace nodes should not matter.
7748 Enhanced error reporting for the case where a named object is not
7749 found during control method execution. The full ACPI namepath
7750 (name reference) of the object that was not found is displayed in
7753 Note: as a result of the overhaul of the namespace object types in
7754 the previous release, the namespace nodes for the predefined
7755 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
7756 instead of ACPI_TYPE_ANY. This simplifies the namespace
7757 management code but may affect code that walks the namespace tree
7758 looking for specific object types.
7760 Code and Data Size: Current core subsystem library sizes are shown
7761 below. These are the code and data sizes for the acpica.lib
7762 produced by the Microsoft Visual C++ 6.0 compiler, and these
7763 values do not include any ACPI driver or OSPM code. The debug
7764 version of the code includes the debug output trace mechanism and
7765 has a much larger code and data size. Note that these values will
7766 vary depending on the efficiency of the compiler and the compiler
7767 options used during generation.
7770 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
7771 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
7773 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
7774 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
7779 Fixed a problem introduced in the previous release where the
7780 Processor and Thermal objects were not recognized and installed in
7781 /proc. This was related to the scope type change described above.
7784 3) iASL Compiler/Disassembler
7786 Implemented the -g option to get all of the required ACPI tables
7787 from the registry and save them to files (Windows version of the
7788 compiler only.) The required tables are the FADT, FACS, and DSDT.
7790 Added ACPI table checksum validation during table disassembly in
7791 order to catch corrupted tables.
7794 ----------------------------------------
7795 22 October 2002. Summary of changes for version 20021022.
7797 1) ACPI CA Core Subsystem:
7799 Implemented a restriction on the Scope operator that the target
7800 must already exist in the namespace at the time the operator is
7801 encountered (during table load or method execution). In other
7802 words, forward references are not allowed and Scope() cannot
7803 create a new object. This changes the previous behavior where the
7804 interpreter would create the name if not found. This new behavior
7805 correctly enables the search-to-root algorithm during namespace
7806 lookup of the target name. Because of this upsearch, this fixes
7807 the known Compaq _SB_.OKEC problem and makes both the AML
7808 interpreter and iASL compiler compatible with other ACPI
7811 Completed a major overhaul of the internal ACPI object types for
7812 the ACPI Namespace and the associated operand objects. Many of
7813 these types had become obsolete with the introduction of the two-
7814 pass namespace load. This cleanup simplifies the code and makes
7815 the entire namespace load mechanism much clearer and easier to
7818 Improved debug output for tracking scope opening/closing to help
7819 diagnose scoping issues. The old scope name as well as the new
7820 scope name are displayed. Also improved error messages for
7821 problems with ASL Mutex objects and error messages for GPE
7824 Cleaned up the namespace dump code, removed obsolete code.
7826 All string output (for all namespace/object dumps) now uses the
7827 common ACPI string output procedure which handles escapes properly
7828 and does not emit non-printable characters.
7830 Fixed some issues with constants in the 64-bit version of the
7831 local C library (utclib.c)
7836 EC Driver: No longer attempts to acquire the Global Lock at
7840 3) iASL Compiler/Disassembler
7842 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
7843 2 opcodes outside of a control method. This means that the
7844 "executable" operators (versus the "namespace" operators) cannot
7845 be used at the table level; they can only be used within a control
7848 Implemented the restriction on the Scope() operator where the
7849 target must already exist in the namespace at the time the
7850 operator is encountered (during ASL compilation). In other words,
7851 forward references are not allowed and Scope() cannot create a new
7852 object. This makes the iASL compiler compatible with other ACPI
7853 implementations and makes the Scope() implementation adhere to the
7856 Fixed a problem where namepath optimization for the Alias operator
7857 was optimizing the wrong path (of the two namepaths.) This caused
7858 a "Missing alias link" error message.
7860 Fixed a problem where an "unknown reserved name" warning could be
7861 incorrectly generated for names like "_SB" when the trailing
7862 underscore is not used in the original ASL.
7864 Fixed a problem where the reserved name check did not handle
7865 NamePaths with multiple NameSegs correctly. The first nameseg of
7866 the NamePath was examined instead of the last NameSeg.
7869 ----------------------------------------
7871 02 October 2002. Summary of changes for this release.
7874 1) ACPI CA Core Subsystem version 20021002:
7876 Fixed a problem where a store/copy of a string to an existing
7877 string did not always set the string length properly in the String
7880 Fixed a reported problem with the ToString operator where the
7881 behavior was identical to the ToHexString operator instead of just
7882 simply converting a raw buffer to a string data type.
7884 Fixed a problem where CopyObject and the other "explicit"
7885 conversion operators were not updating the internal namespace node
7886 type as part of the store operation.
7888 Fixed a memory leak during implicit source operand conversion
7889 where the original object was not deleted if it was converted to a
7890 new object of a different type.
7892 Enhanced error messages for all problems associated with namespace
7893 lookups. Common procedure generates and prints the lookup name as
7894 well as the formatted status.
7896 Completed implementation of a new design for the Alias support
7897 within the namespace. The existing design did not handle the case
7898 where a new object was assigned to one of the two names due to the
7899 use of an explicit conversion operator, resulting in the two names
7900 pointing to two different objects. The new design simply points
7901 the Alias name to the original name node - not to the object.
7902 This results in a level of indirection that must be handled in the
7903 name resolution mechanism.
7905 Code and Data Size: Current core subsystem library sizes are shown
7906 below. These are the code and data sizes for the acpica.lib
7907 produced by the Microsoft Visual C++ 6.0 compiler, and these
7908 values do not include any ACPI driver or OSPM code. The debug
7909 version of the code includes the debug output trace mechanism and
7910 has a larger code and data size. Note that these values will vary
7911 depending on the efficiency of the compiler and the compiler
7912 options used during generation.
7915 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
7916 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
7918 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
7919 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
7924 Initialize thermal driver's timer before it is used. (Knut
7927 Allow handling negative celsius values. (Kochi Takayoshi)
7929 Fix thermal management and make trip points. R/W (Pavel Machek)
7931 Fix /proc/acpi/sleep. (P. Christeas)
7933 IA64 fixes. (David Mosberger)
7935 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
7937 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
7941 3) iASL Compiler/Disassembler
7943 Clarified some warning/error messages.
7946 ----------------------------------------
7947 18 September 2002. Summary of changes for this release.
7950 1) ACPI CA Core Subsystem version 20020918:
7952 Fixed a reported problem with reference chaining (via the Index()
7953 and RefOf() operators) in the ObjectType() and SizeOf() operators.
7954 The definition of these operators includes the dereferencing of
7955 all chained references to return information on the base object.
7957 Fixed a problem with stores to indexed package elements - the
7958 existing code would not complete the store if an "implicit
7959 conversion" was not performed. In other words, if the existing
7960 object (package element) was to be replaced completely, the code
7961 didn't handle this case.
7963 Relaxed typechecking on the ASL "Scope" operator to allow the
7964 target name to refer to an object of type Integer, String, or
7965 Buffer, in addition to the scoping object types (Device,
7966 predefined Scopes, Processor, PowerResource, and ThermalZone.)
7967 This allows existing AML code that has workarounds for a bug in
7968 Windows to function properly. A warning is issued, however. This
7969 affects both the AML interpreter and the iASL compiler. Below is
7970 an example of this type of ASL code:
7976 Fixed some reported problems with 64-bit integer support in the
7977 local implementation of C library functions (clib.c)
7982 Use ACPI fix map region instead of IOAPIC region, since it is
7983 undefined in non-SMP.
7985 Ensure that the SCI has the proper polarity and trigger, even on
7986 systems that do not have an interrupt override entry in the MADT.
7988 2.5 big driver reorganization (Pat Mochel)
7990 Use early table mapping code from acpitable.c (Andi Kleen)
7992 New blacklist entries (Andi Kleen)
7994 Blacklist improvements. Split blacklist code out into a separate
7995 file. Move checking the blacklist to very early. Previously, we
7996 would use ACPI tables, and then halfway through init, check the
7997 blacklist -- too late. Now, it's early enough to completely fall-
8001 3) iASL Compiler/Disassembler version 20020918:
8003 Fixed a problem where the typechecking code didn't know that an
8004 alias could point to a method. In other words, aliases were not
8005 being dereferenced during typechecking.
8008 ----------------------------------------
8009 29 August 2002. Summary of changes for this release.
8011 1) ACPI CA Core Subsystem Version 20020829:
8013 If the target of a Scope() operator already exists, it must be an
8014 object type that actually opens a scope -- such as a Device,
8015 Method, Scope, etc. This is a fatal runtime error. Similar error
8016 check has been added to the iASL compiler also.
8018 Tightened up the namespace load to disallow multiple names in the
8019 same scope. This previously was allowed if both objects were of
8020 the same type. (i.e., a lookup was the same as entering a new
8026 Ensure that the ACPI interrupt has the proper trigger and
8029 local_irq_disable is extraneous. (Matthew Wilcox)
8031 Make "acpi=off" actually do what it says, and not use the ACPI
8032 interpreter *or* the tables.
8034 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
8038 3) iASL Compiler/Disassembler Version 20020829:
8040 Implemented namepath optimization for name declarations. For
8041 example, a declaration like "Method (\_SB_.ABCD)" would get
8042 optimized to "Method (ABCD)" if the declaration is within the
8043 \_SB_ scope. This optimization is in addition to the named
8044 reference path optimization first released in the previous
8045 version. This would seem to complete all possible optimizations
8046 for namepaths within the ASL/AML.
8048 If the target of a Scope() operator already exists, it must be an
8049 object type that actually opens a scope -- such as a Device,
8052 Implemented a check and warning for unreachable code in the same
8053 block below a Return() statement.
8055 Fixed a problem where the listing file was not generated if the
8056 compiler aborted if the maximum error count was exceeded (200).
8058 Fixed a problem where the typechecking of method return values was
8059 broken. This includes the check for a return value when the
8060 method is invoked as a TermArg (a return value is expected.)
8062 Fixed a reported problem where EOF conditions during a quoted
8063 string or comment caused a fault.
8066 ----------------------------------------
8067 15 August 2002. Summary of changes for this release.
8069 1) ACPI CA Core Subsystem Version 20020815:
8071 Fixed a reported problem where a Store to a method argument that
8072 contains a reference did not perform the indirect store correctly.
8073 This problem was created during the conversion to the new
8074 reference object model - the indirect store to a method argument
8075 code was not updated to reflect the new model.
8077 Reworked the ACPI mode change code to better conform to ACPI 2.0,
8078 handle corner cases, and improve code legibility (Kochi Takayoshi)
8080 Fixed a problem with the pathname parsing for the carat (^)
8081 prefix. The heavy use of the carat operator by the new namepath
8082 optimization in the iASL compiler uncovered a problem with the AML
8083 interpreter handling of this prefix. In the case where one or
8084 more carats precede a single nameseg, the nameseg was treated as
8085 standalone and the search rule (to root) was inadvertently
8086 applied. This could cause both the iASL compiler and the
8087 interpreter to find the wrong object or to miss the error that
8088 should occur if the object does not exist at that exact pathname.
8090 Found and fixed the problem where the HP Pavilion DSDT would not
8091 load. This was a relatively minor tweak to the table loading code
8092 (a problem caused by the unexpected encounter with a method
8093 invocation not within a control method), but it does not solve the
8094 overall issue of the execution of AML code at the table level.
8095 This investigation is still ongoing.
8097 Code and Data Size: Current core subsystem library sizes are shown
8098 below. These are the code and data sizes for the acpica.lib
8099 produced by the Microsoft Visual C++ 6.0 compiler, and these
8100 values do not include any ACPI driver or OSPM code. The debug
8101 version of the code includes the debug output trace mechanism and
8102 has a larger code and data size. Note that these values will vary
8103 depending on the efficiency of the compiler and the compiler
8104 options used during generation.
8107 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
8108 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
8110 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
8111 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
8116 Remove redundant slab.h include (Brad Hards)
8118 Fix several bugs in thermal.c (Herbert Nachtnebel)
8120 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
8122 Change acpi_system_suspend to use updated irq functions (Pavel
8125 Export acpi_get_firmware_table (Matthew Wilcox)
8127 Use proper root proc entry for ACPI (Kochi Takayoshi)
8129 Fix early-boot table parsing (Bjorn Helgaas)
8132 3) iASL Compiler/Disassembler
8134 Reworked the compiler options to make them more consistent and to
8135 use two-letter options where appropriate. We were running out of
8136 sensible letters. This may break some makefiles, so check the
8137 current options list by invoking the compiler with no parameters.
8139 Completed the design and implementation of the ASL namepath
8140 optimization option for the compiler. This option optimizes all
8141 references to named objects to the shortest possible path. The
8142 first attempt tries to utilize a single nameseg (4 characters) and
8143 the "search-to-root" algorithm used by the interpreter. If that
8144 cannot be used (because either the name is not in the search path
8145 or there is a conflict with another object with the same name),
8146 the pathname is optimized using the carat prefix (usually a
8147 shorter string than specifying the entire path from the root.)
8149 Implemented support to obtain the DSDT from the Windows registry
8150 (when the disassembly option is specified with no input file).
8151 Added this code as the implementation for AcpiOsTableOverride in
8152 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
8153 utility) to scan memory for the DSDT to the AcpiOsTableOverride
8154 function in the DOS OSL to make the disassembler truly OS
8157 Implemented a new option to disassemble and compile in one step.
8158 When used without an input filename, this option will grab the
8159 DSDT from the local machine, disassemble it, and compile it in one
8162 Added a warning message for invalid escapes (a backslash followed
8163 by any character other than the allowable escapes). This catches
8164 the quoted string error "\_SB_" (which should be "\\_SB_" ).
8166 Also, there are numerous instances in the ACPI specification where
8169 Added a compiler option to disable all optimizations. This is
8170 basically the "compatibility mode" because by using this option,
8171 the AML code will come out exactly the same as other ASL
8174 Added error messages for incorrectly ordered dependent resource
8175 functions. This includes: missing EndDependentFn macro at end of
8176 dependent resource list, nested dependent function macros (both
8177 start and end), and missing StartDependentFn macro. These are
8178 common errors that should be caught at compile time.
8180 Implemented _OSI support for the disassembler and compiler. _OSI
8181 must be included in the namespace for proper disassembly (because
8182 the disassembler must know the number of arguments.)
8184 Added an "optimization" message type that is optional (off by
8185 default). This message is used for all optimizations - including
8186 constant folding, integer optimization, and namepath optimization.
8188 ----------------------------------------
8189 25 July 2002. Summary of changes for this release.
8192 1) ACPI CA Core Subsystem Version 20020725:
8194 The AML Disassembler has been enhanced to produce compilable ASL
8195 code and has been integrated into the iASL compiler (see below) as
8196 well as the single-step disassembly for the AML debugger and the
8197 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
8198 resource templates and macros are fully supported. The
8199 disassembler has been tested on over 30 different AML files,
8200 producing identical AML when the resulting disassembled ASL file
8201 is recompiled with the same ASL compiler.
8203 Modified the Resource Manager to allow zero interrupts and zero
8204 dma channels during the GetCurrentResources call. This was
8205 causing problems on some platforms.
8207 Added the AcpiOsRedirectOutput interface to the OSL to simplify
8208 output redirection for the AcpiOsPrintf and AcpiOsVprintf
8211 Code and Data Size: Current core subsystem library sizes are shown
8212 below. These are the code and data sizes for the acpica.lib
8213 produced by the Microsoft Visual C++ 6.0 compiler, and these
8214 values do not include any ACPI driver or OSPM code. The debug
8215 version of the code includes the debug output trace mechanism and
8216 has a larger code and data size. Note that these values will vary
8217 depending on the efficiency of the compiler and the compiler
8218 options used during generation.
8221 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
8222 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
8224 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
8225 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
8230 Fixed a panic in the EC driver (Dominik Brodowski)
8232 Implemented checksum of the R/XSDT itself during Linux table scan
8238 The AML disassembler is integrated into the compiler. The "-d"
8239 option invokes the disassembler to completely disassemble an
8240 input AML file, producing as output a text ASL file with the
8241 extension ".dsl" (to avoid name collisions with existing .asl
8242 source files.) A future enhancement will allow the disassembler
8243 to obtain the BIOS DSDT from the registry under Windows.
8245 Fixed a problem with the VendorShort and VendorLong resource
8246 descriptors where an invalid AML sequence was created.
8248 Implemented a fix for BufferData term in the ASL parser. It was
8249 inadvertently defined twice, allowing invalid syntax to pass and
8250 causing reduction conflicts.
8252 Fixed a problem where the Ones opcode could get converted to a
8253 value of zero if "Ones" was used where a byte, word or dword value
8254 was expected. The 64-bit value is now truncated to the correct
8255 size with the correct value.
8259 ----------------------------------------
8260 02 July 2002. Summary of changes for this release.
8263 1) ACPI CA Core Subsystem Version 20020702:
8265 The Table Manager code has been restructured to add several new
8266 features. Tables that are not required by the core subsystem
8267 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
8268 validated in any way and are returned from AcpiGetFirmwareTable if
8269 requested. The AcpiOsTableOverride interface is now called for
8270 each table that is loaded by the subsystem in order to allow the
8271 host to override any table it chooses. Previously, only the DSDT
8272 could be overridden. Added one new files, tbrsdt.c and
8275 Fixed a problem with the conversion of internal package objects to
8276 external objects (when a package is returned from a control
8277 method.) The return buffer length was set to zero instead of the
8278 proper length of the package object.
8280 Fixed a reported problem with the use of the RefOf and DeRefOf
8281 operators when passing reference arguments to control methods. A
8282 new type of Reference object is used internally for references
8283 produced by the RefOf operator.
8285 Added additional error messages in the Resource Manager to explain
8286 AE_BAD_DATA errors when they occur during resource parsing.
8288 Split the AcpiEnableSubsystem into two primitives to enable a
8289 finer granularity initialization sequence. These two calls should
8290 be called in this order: AcpiEnableSubsystem (flags),
8291 AcpiInitializeObjects (flags). The flags parameter remains the
8297 Updated the ACPI utilities module to understand the new style of
8298 fully resolved package objects that are now returned from the core
8299 subsystem. This eliminates errors of the form:
8301 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
8302 acpi_utils-0430 [145] acpi_evaluate_reference:
8303 Invalid element in package (not a device reference)
8305 The method evaluation utility uses the new buffer allocation
8306 scheme instead of calling AcpiEvaluate Object twice.
8308 Added support for ECDT. This allows the use of the Embedded
8310 Controller before the namespace has been fully initialized, which
8311 is necessary for ACPI 2.0 support, and for some laptops to
8312 initialize properly. (Laptops using ECDT are still rare, so only
8313 limited testing was performed of the added functionality.)
8315 Fixed memory leaks in the EC driver.
8317 Eliminated a brittle code structure in acpi_bus_init().
8319 Eliminated the acpi_evaluate() helper function in utils.c. It is
8320 no longer needed since acpi_evaluate_object can optionally
8321 allocate memory for the return object.
8323 Implemented fix for keyboard hang when getting battery readings on
8324 some systems (Stephen White)
8326 PCI IRQ routing update (Dominik Brodowski)
8328 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
8331 ----------------------------------------
8332 11 June 2002. Summary of changes for this release.
8335 1) ACPI CA Core Subsystem Version 20020611:
8337 Fixed a reported problem where constants such as Zero and One
8338 appearing within _PRT packages were not handled correctly within
8339 the resource manager code. Originally reported against the ASL
8340 compiler because the code generator now optimizes integers to
8341 their minimal AML representation (i.e. AML constants if possible.)
8342 The _PRT code now handles all AML constant opcodes correctly
8343 (Zero, One, Ones, Revision).
8345 Fixed a problem with the Concatenate operator in the AML
8346 interpreter where a buffer result object was incorrectly marked as
8347 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
8349 All package sub-objects are now fully resolved before they are
8350 returned from the external ACPI interfaces. This means that name
8351 strings are resolved to object handles, and constant operators
8352 (Zero, One, Ones, Revision) are resolved to Integers.
8354 Implemented immediate resolution of the AML Constant opcodes
8355 (Zero, One, Ones, Revision) to Integer objects upon detection
8356 within the AML stream. This has simplified and reduced the
8357 generated code size of the subsystem by eliminating about 10
8358 switch statements for these constants (which previously were
8359 contained in Reference objects.) The complicating issues are that
8360 the Zero opcode is used as a "placeholder" for unspecified
8361 optional target operands and stores to constants are defined to be
8364 Code and Data Size: Current core subsystem library sizes are shown
8365 below. These are the code and data sizes for the acpica.lib
8366 produced by the Microsoft Visual C++ 6.0 compiler, and these
8367 values do not include any ACPI driver or OSPM code. The debug
8368 version of the code includes the debug output trace mechanism and
8369 has a larger code and data size. Note that these values will vary
8370 depending on the efficiency of the compiler and the compiler
8371 options used during generation.
8374 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
8375 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
8377 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
8378 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
8384 Added preliminary support for obtaining _TRA data for PCI root
8385 bridges (Bjorn Helgaas).
8388 3) iASL Compiler Version X2046:
8390 Fixed a problem where the "_DDN" reserved name was defined to be a
8391 control method with one argument. There are no arguments, and
8392 _DDN does not have to be a control method.
8394 Fixed a problem with the Linux version of the compiler where the
8395 source lines printed with error messages were the wrong lines.
8396 This turned out to be the "LF versus CR/LF" difference between
8397 Windows and Unix. This appears to be the longstanding issue
8398 concerning listing output and error messages.
8400 Fixed a problem with the Linux version of compiler where opcode
8401 names within error messages were wrong. This was caused by a
8402 slight difference in the output of the Flex tool on Linux versus
8405 Fixed a problem with the Linux compiler where the hex output files
8406 contained some garbage data caused by an internal buffer overrun.
8409 ----------------------------------------
8410 17 May 2002. Summary of changes for this release.
8413 1) ACPI CA Core Subsystem Version 20020517:
8415 Implemented a workaround to an BIOS bug discovered on the HP
8416 OmniBook where the FADT revision number and the table size are
8417 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
8418 behavior is to fallback to using only the ACPI 1.0 fields of the
8419 FADT if the table is too small to be a ACPI 2.0 table as claimed
8420 by the revision number. Although this is a BIOS bug, this is a
8421 case where the workaround is simple enough and with no side
8422 effects, so it seemed prudent to add it. A warning message is
8425 Implemented minimum size checks for the fixed-length ACPI tables -
8426 - the FADT and FACS, as well as consistency checks between the
8427 revision number and the table size.
8429 Fixed a reported problem in the table override support where the
8430 new table pointer was incorrectly treated as a physical address
8431 instead of a logical address.
8433 Eliminated the use of the AE_AML_ERROR exception and replaced it
8434 with more descriptive codes.
8436 Fixed a problem where an exception would occur if an ASL Field was
8437 defined with no named Field Units underneath it (used by some
8440 Code and Data Size: Current core subsystem library sizes are shown
8441 below. These are the code and data sizes for the acpica.lib
8442 produced by the Microsoft Visual C++ 6.0 compiler, and these
8443 values do not include any ACPI driver or OSPM code. The debug
8444 version of the code includes the debug output trace mechanism and
8445 has a larger code and data size. Note that these values will vary
8446 depending on the efficiency of the compiler and the compiler
8447 options used during generation.
8450 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
8451 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
8453 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
8454 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
8460 Much work done on ACPI init (MADT and PCI IRQ routing support).
8461 (Paul D. and Dominik Brodowski)
8463 Fix PCI IRQ-related panic on boot (Sam Revitch)
8465 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
8467 Fix "MHz" typo (Dominik Brodowski)
8469 Fix RTC year 2000 issue (Dominik Brodowski)
8471 Preclude multiple button proc entries (Eric Brunet)
8473 Moved arch-specific code out of include/platform/aclinux.h
8475 3) iASL Compiler Version X2044:
8477 Implemented error checking for the string used in the EISAID macro
8478 (Usually used in the definition of the _HID object.) The code now
8479 strictly enforces the PnP format - exactly 7 characters, 3
8480 uppercase letters and 4 hex digits.
8482 If a raw string is used in the definition of the _HID object
8483 (instead of the EISAID macro), the string must contain all
8484 alphanumeric characters (e.g., "*PNP0011" is not allowed because
8487 Implemented checking for invalid use of ACPI reserved names for
8488 most of the name creation operators (Name, Device, Event, Mutex,
8489 OperationRegion, PowerResource, Processor, and ThermalZone.)
8490 Previously, this check was only performed for control methods.
8492 Implemented an additional check on the Name operator to emit an
8493 error if a reserved name that must be implemented in ASL as a
8494 control method is used. We know that a reserved name must be a
8495 method if it is defined with input arguments.
8497 The warning emitted when a namespace object reference is not found
8498 during the cross reference phase has been changed into an error.
8499 The "External" directive should be used for names defined in other
8503 4) Tools and Utilities
8505 The 16-bit tools (adump16 and aexec16) have been regenerated and
8508 Fixed a problem with the output of both acpidump and adump16 where
8509 the indentation of closing parentheses and brackets was not
8511 aligned properly with the parent block.
8514 ----------------------------------------
8515 03 May 2002. Summary of changes for this release.
8518 1) ACPI CA Core Subsystem Version 20020503:
8520 Added support a new OSL interface that allows the host operating
8522 system software to override the DSDT found in the firmware -
8523 AcpiOsTableOverride. With this interface, the OSL can examine the
8524 version of the firmware DSDT and replace it with a different one
8527 Added new external interfaces for accessing ACPI registers from
8528 device drivers and other system software - AcpiGetRegister and
8529 AcpiSetRegister. This was simply an externalization of the
8530 existing AcpiHwBitRegister interfaces.
8532 Fixed a regression introduced in the previous build where the
8533 ASL/AML CreateField operator always returned an error,
8534 "destination must be a NS Node".
8536 Extended the maximum time (before failure) to successfully enable
8537 ACPI mode to 3 seconds.
8539 Code and Data Size: Current core subsystem library sizes are shown
8540 below. These are the code and data sizes for the acpica.lib
8541 produced by the Microsoft Visual C++ 6.0 compiler, and these
8542 values do not include any ACPI driver or OSPM code. The debug
8543 version of the code includes the debug output trace mechanism and
8544 has a larger code and data size. Note that these values will vary
8545 depending on the efficiency of the compiler and the compiler
8546 options used during generation.
8549 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
8550 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
8552 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
8553 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
8558 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
8559 free. While 3 out of 4 of our in-house systems work fine, the last
8560 one still hangs when testing the LAPIC timer.
8562 Renamed many files in 2.5 kernel release to omit "acpi_" from the
8565 Added warning on boot for Presario 711FR.
8567 Sleep improvements (Pavel Machek)
8569 ACPI can now be built without CONFIG_PCI enabled.
8571 IA64: Fixed memory map functions (JI Lee)
8574 3) iASL Compiler Version X2043:
8576 Added support to allow the compiler to be integrated into the MS
8577 VC++ development environment for one-button compilation of single
8578 files or entire projects -- with error-to-source-line mapping.
8580 Implemented support for compile-time constant folding for the
8581 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
8582 specification. This allows the ASL writer to use expressions
8583 instead of Integer/Buffer/String constants in terms that must
8584 evaluate to constants at compile time and will also simplify the
8585 emitted AML in any such sub-expressions that can be folded
8586 (evaluated at compile-time.) This increases the size of the
8587 compiler significantly because a portion of the ACPI CA AML
8588 interpreter is included within the compiler in order to pre-
8589 evaluate constant expressions.
8592 Fixed a problem with the "Unicode" ASL macro that caused the
8593 compiler to fault. (This macro is used in conjunction with the
8594 _STR reserved name.)
8596 Implemented an AML opcode optimization to use the Zero, One, and
8597 Ones opcodes where possible to further reduce the size of integer
8598 constants and thus reduce the overall size of the generated AML
8601 Implemented error checking for new reserved terms for ACPI version
8604 Implemented the -qr option to display the current list of ACPI
8605 reserved names known to the compiler.
8607 Implemented the -qc option to display the current list of ASL
8608 operators that are allowed within constant expressions and can
8609 therefore be folded at compile time if the operands are constants.
8614 Updated the Programmer's Reference for new interfaces, data types,
8615 and memory allocation model options.
8617 Updated the iASL Compiler User Reference to apply new format and
8618 add information about new features and options.
8620 ----------------------------------------
8621 19 April 2002. Summary of changes for this release.
8623 1) ACPI CA Core Subsystem Version 20020419:
8625 The source code base for the Core Subsystem has been completely
8626 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
8627 versions. The Lint option files used are included in the
8628 /acpi/generate/lint directory.
8630 Implemented enhanced status/error checking across the entire
8631 Hardware manager subsystem. Any hardware errors (reported from
8632 the OSL) are now bubbled up and will abort a running control
8636 Fixed a problem where the per-ACPI-table integer width (32 or 64)
8637 was stored only with control method nodes, causing a fault when
8638 non-control method code was executed during table loading. The
8639 solution implemented uses a global variable to indicate table
8640 width across the entire ACPI subsystem. Therefore, ACPI CA does
8641 not support mixed integer widths across different ACPI tables
8644 Fixed a problem where NULL extended fields (X fields) in an ACPI
8645 2.0 ACPI FADT caused the table load to fail. Although the
8646 existing ACPI specification is a bit fuzzy on this topic, the new
8647 behavior is to fall back on a ACPI 1.0 field if the corresponding
8648 ACPI 2.0 X field is zero (even though the table revision indicates
8649 a full ACPI 2.0 table.) The ACPI specification will be updated to
8652 Fixed a problem with the SystemMemory operation region handler
8653 where memory was always accessed byte-wise even if the AML-
8654 specified access width was larger than a byte. This caused
8655 problems on systems with memory-mapped I/O. Memory is now
8656 accessed with the width specified. On systems that do not support
8657 non-aligned transfers, a check is made to guarantee proper address
8658 alignment before proceeding in order to avoid an AML-caused
8659 alignment fault within the kernel.
8662 Fixed a problem with the ExtendedIrq resource where only one byte
8663 of the 4-byte Irq field was extracted.
8665 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
8666 function was out of date and required a rewrite.
8668 Code and Data Size: Current core subsystem library sizes are shown
8669 below. These are the code and data sizes for the acpica.lib
8670 produced by the Microsoft Visual C++ 6.0 compiler, and these
8671 values do not include any ACPI driver or OSPM code. The debug
8672 version of the code includes the debug output trace mechanism and
8673 has a larger code and data size. Note that these values will vary
8674 depending on the efficiency of the compiler and the compiler
8675 options used during generation.
8678 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
8679 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
8681 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
8682 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
8687 PCI IRQ routing fixes (Dominik Brodowski)
8690 3) iASL Compiler Version X2042:
8692 Implemented an additional compile-time error check for a field
8693 unit whose size + minimum access width would cause a run-time
8694 access beyond the end-of-region. Previously, only the field size
8697 The Core subsystem and iASL compiler now share a common parse
8698 object in preparation for compile-time evaluation of the type
8699 3/4/5 ASL operators.
8702 ----------------------------------------
8703 Summary of changes for this release: 03_29_02
8705 1) ACPI CA Core Subsystem Version 20020329:
8707 Implemented support for late evaluation of TermArg operands to
8708 Buffer and Package objects. This allows complex expressions to be
8709 used in the declarations of these object types.
8711 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
8712 1.0, if the field was larger than 32 bits, it was returned as a
8713 buffer - otherwise it was returned as an integer. In ACPI 2.0,
8714 the field is returned as a buffer only if the field is larger than
8715 64 bits. The TableRevision is now considered when making this
8716 conversion to avoid incompatibility with existing ASL code.
8718 Implemented logical addressing for AcpiOsGetRootPointer. This
8719 allows an RSDP with either a logical or physical address. With
8720 this support, the host OS can now override all ACPI tables with
8721 one logical RSDP. Includes implementation of "typed" pointer
8722 support to allow a common data type for both physical and logical
8723 pointers internally. This required a change to the
8724 AcpiOsGetRootPointer interface.
8726 Implemented the use of ACPI 2.0 Generic Address Structures for all
8727 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
8728 mapped I/O for these ACPI features.
8730 Initialization now ignores not only non-required tables (All
8731 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
8732 not validate the table headers of unrecognized tables.
8734 Fixed a problem where a notify handler could only be
8735 installed/removed on an object of type Device. All "notify"
8737 objects are now supported -- Devices, Processor, Power, and
8740 Removed most verbosity from the ACPI_DB_INFO debug level. Only
8741 critical information is returned when this debug level is enabled.
8743 Code and Data Size: Current core subsystem library sizes are shown
8744 below. These are the code and data sizes for the acpica.lib
8745 produced by the Microsoft Visual C++ 6.0 compiler, and these
8746 values do not include any ACPI driver or OSPM code. The debug
8747 version of the code includes the debug output trace mechanism and
8748 has a larger code and data size. Note that these values will vary
8749 depending on the efficiency of the compiler and the compiler
8750 options used during generation.
8753 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
8754 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
8756 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
8757 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
8762 The processor driver (acpi_processor.c) now fully supports ACPI
8763 2.0-based processor performance control (e.g. Intel(R)
8764 SpeedStep(TM) technology) Note that older laptops that only have
8765 the Intel "applet" interface are not supported through this. The
8766 'limit' and 'performance' interface (/proc) are fully functional.
8767 [Note that basic policy for controlling performance state
8768 transitions will be included in the next version of ospmd.] The
8769 idle handler was modified to more aggressively use C2, and PIIX4
8770 errata handling underwent a complete overhaul (big thanks to
8773 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
8774 based devices in the ACPI namespace are now dynamically bound
8775 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
8776 This allows, among other things, ACPI to resolve bus numbers for
8777 subordinate PCI bridges.
8779 Enhanced PCI IRQ routing to get the proper bus number for _PRT
8780 entries defined underneath PCI bridges.
8782 Added IBM 600E to bad bios list due to invalid _ADR value for
8783 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
8785 In the process of adding full MADT support (e.g. IOAPIC) for IA32
8786 (acpi.c, mpparse.c) -- stay tuned.
8788 Added back visual differentiation between fixed-feature and
8789 control-method buttons in dmesg. Buttons are also subtyped (e.g.
8790 button/power/PWRF) to simplify button identification.
8792 We no longer use -Wno-unused when compiling debug. Please ignore
8793 any "_THIS_MODULE defined but not used" messages.
8795 Can now shut down the system using "magic sysrq" key.
8798 3) iASL Compiler version 2041:
8800 Fixed a problem where conversion errors for hex/octal/decimal
8801 constants were not reported.
8803 Implemented a fix for the General Register template Address field.
8804 This field was 8 bits when it should be 64.
8806 Fixed a problem where errors/warnings were no longer being emitted
8807 within the listing output file.
8809 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
8810 exactly 4 characters, alphanumeric only.
8815 ----------------------------------------
8816 Summary of changes for this release: 03_08_02
8819 1) ACPI CA Core Subsystem Version 20020308:
8821 Fixed a problem with AML Fields where the use of the "AccessAny"
8822 keyword could cause an interpreter error due to attempting to read
8823 or write beyond the end of the parent Operation Region.
8825 Fixed a problem in the SystemMemory Operation Region handler where
8826 an attempt was made to map memory beyond the end of the region.
8827 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
8828 errors on some Linux systems.
8830 Fixed a problem where the interpreter/namespace "search to root"
8831 algorithm was not functioning for some object types. Relaxed the
8832 internal restriction on the search to allow upsearches for all
8833 external object types as well as most internal types.
8838 We now use safe_halt() macro versus individual calls to sti | hlt.
8840 Writing to the processor limit interface should now work. "echo 1"
8841 will increase the limit, 2 will decrease, and 0 will reset to the
8848 Fixed segfault on Linux version.
8851 ----------------------------------------
8852 Summary of changes for this release: 02_25_02
8854 1) ACPI CA Core Subsystem:
8857 Fixed a problem where the GPE bit masks were not initialized
8858 properly, causing erratic GPE behavior.
8860 Implemented limited support for multiple calling conventions. The
8861 code can be generated with either the VPL (variable parameter
8862 list, or "C") convention, or the FPL (fixed parameter list, or
8863 "Pascal") convention. The core subsystem is about 3.4% smaller
8864 when generated with FPL.
8869 Re-add some /proc/acpi/event functionality that was lost during
8872 Resolved issue with /proc events for fixed-feature buttons showing
8873 up as the system device.
8875 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
8877 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
8879 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
8881 Fixed limit interface & usage to fix bugs with passive cooling
8884 Restructured PRT support.
8887 ----------------------------------------
8888 Summary of changes for this label: 02_14_02
8891 1) ACPI CA Core Subsystem:
8893 Implemented support in AcpiLoadTable to allow loading of FACS and
8896 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
8897 been removed. All 64-bit platforms should be migrated to the ACPI
8898 2.0 tables. The actbl71.h header has been removed from the source
8901 All C macros defined within the subsystem have been prefixed with
8902 "ACPI_" to avoid collision with other system include files.
8904 Removed the return value for the two AcpiOsPrint interfaces, since
8905 it is never used and causes lint warnings for ignoring the return
8908 Added error checking to all internal mutex acquire and release
8909 calls. Although a failure from one of these interfaces is
8910 probably a fatal system error, these checks will cause the
8911 immediate abort of the currently executing method or interface.
8913 Fixed a problem where the AcpiSetCurrentResources interface could
8914 fault. This was a side effect of the deployment of the new memory
8917 Fixed a couple of problems with the Global Lock support introduced
8918 in the last major build. The "common" (1.0/2.0) internal FACS was
8919 being overwritten with the FACS signature and clobbering the
8920 Global Lock pointer. Also, the actual firmware FACS was being
8921 unmapped after construction of the "common" FACS, preventing
8922 access to the actual Global Lock field within it. The "common"
8923 internal FACS is no longer installed as an actual ACPI table; it
8924 is used simply as a global.
8926 Code and Data Size: Current core subsystem library sizes are shown
8927 below. These are the code and data sizes for the acpica.lib
8928 produced by the Microsoft Visual C++ 6.0 compiler, and these
8929 values do not include any ACPI driver or OSPM code. The debug
8930 version of the code includes the debug output trace mechanism and
8931 has a larger code and data size. Note that these values will vary
8932 depending on the efficiency of the compiler and the compiler
8933 options used during generation.
8935 Previous Release (02_07_01)
8936 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
8937 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
8939 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
8940 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
8945 Updated Linux-specific code for core macro and OSL interface
8946 changes described above.
8948 Improved /proc/acpi/event. It now can be opened only once and has
8949 proper poll functionality.
8951 Fixed and restructured power management (acpi_bus).
8953 Only create /proc "view by type" when devices of that class exist.
8955 Fixed "charging/discharging" bug (and others) in acpi_battery.
8957 Improved thermal zone code.
8960 3) ASL Compiler, version X2039:
8963 Implemented the new compiler restriction on ASL String hex/octal
8964 escapes to non-null, ASCII values. An error results if an invalid
8965 value is used. (This will require an ACPI 2.0 specification
8968 AML object labels that are output to the optional C and ASM source
8969 are now prefixed with both the ACPI table signature and table ID
8970 to help guarantee uniqueness within a large BIOS project.
8973 ----------------------------------------
8974 Summary of changes for this label: 02_01_02
8976 1) ACPI CA Core Subsystem:
8978 ACPI 2.0 support is complete in the entire Core Subsystem and the
8979 ASL compiler. All new ACPI 2.0 operators are implemented and all
8980 other changes for ACPI 2.0 support are complete. With
8981 simultaneous code and data optimizations throughout the subsystem,
8982 ACPI 2.0 support has been implemented with almost no additional
8983 cost in terms of code and data size.
8985 Implemented a new mechanism for allocation of return buffers. If
8986 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
8987 be allocated on behalf of the caller. Consolidated all return
8988 buffer validation and allocation to a common procedure. Return
8989 buffers will be allocated via the primary OSL allocation interface
8990 since it appears that a separate pool is not needed by most users.
8991 If a separate pool is required for these buffers, the caller can
8992 still use the original mechanism and pre-allocate the buffer(s).
8994 Implemented support for string operands within the DerefOf
8997 Restructured the Hardware and Event managers to be table driven,
8998 simplifying the source code and reducing the amount of generated
9001 Split the common read/write low-level ACPI register bitfield
9002 procedure into a separate read and write, simplifying the code
9005 Obsoleted the AcpiOsCallocate OSL interface. This interface was
9006 used only a handful of times and didn't have enough critical mass
9007 for a separate interface. Replaced with a common calloc procedure
9010 Fixed a reported problem with the GPE number mapping mechanism
9011 that allows GPE1 numbers to be non-contiguous with GPE0.
9012 Reorganized the GPE information and shrunk a large array that was
9013 originally large enough to hold info for all possible GPEs (256)
9014 to simply large enough to hold all GPEs up to the largest GPE
9015 number on the machine.
9017 Fixed a reported problem with resource structure alignment on 64-
9020 Changed the AcpiEnableEvent and AcpiDisableEvent external
9021 interfaces to not require any flags for the common case of
9022 enabling/disabling a GPE.
9024 Implemented support to allow a "Notify" on a Processor object.
9026 Most TBDs in comments within the source code have been resolved
9030 Fixed a problem in the interpreter where a standalone parent
9031 prefix (^) was not handled correctly in the interpreter and
9034 Removed obsolete and unnecessary GPE save/restore code.
9036 Implemented Field support in the ASL Load operator. This allows a
9037 table to be loaded from a named field, in addition to loading a
9038 table directly from an Operation Region.
9040 Implemented timeout and handle support in the external Global Lock
9043 Fixed a problem in the AcpiDump utility where pathnames were no
9044 longer being generated correctly during the dump of named objects.
9046 Modified the AML debugger to give a full display of if/while
9047 predicates instead of just one AML opcode at a time. (The
9048 predicate can have several nested ASL statements.) The old method
9049 was confusing during single stepping.
9051 Code and Data Size: Current core subsystem library sizes are shown
9052 below. These are the code and data sizes for the acpica.lib
9053 produced by the Microsoft Visual C++ 6.0 compiler, and these
9054 values do not include any ACPI driver or OSPM code. The debug
9055 version of the code includes the debug output trace mechanism and
9056 has a larger code and data size. Note that these values will vary
9057 depending on the efficiency of the compiler and the compiler
9058 options used during generation.
9060 Previous Release (12_18_01)
9061 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
9062 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
9064 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
9065 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
9069 Implemented fix for PIIX reverse throttling errata (Processor
9072 Added new Limit interface (Processor and Thermal drivers)
9074 New thermal policy (Thermal driver)
9076 Many updates to /proc
9078 Battery "low" event support (Battery driver)
9080 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
9082 IA32 - IA64 initialization unification, no longer experimental
9084 Menuconfig options redesigned
9086 3) ASL Compiler, version X2037:
9088 Implemented several new output features to simplify integration of
9089 AML code into firmware: 1) Output the AML in C source code with
9090 labels for each named ASL object. The original ASL source code
9091 is interleaved as C comments. 2) Output the AML in ASM source code
9092 with labels and interleaved ASL source. 3) Output the AML in
9093 raw hex table form, in either C or ASM.
9095 Implemented support for optional string parameters to the
9098 Completed support for embedded escape sequences within string
9099 literals. The compiler now supports all single character escapes
9100 as well as the Octal and Hex escapes. Note: the insertion of a
9101 null byte into a string literal (via the hex/octal escape) causes
9102 the string to be immediately terminated. A warning is issued.
9104 Fixed a problem where incorrect AML was generated for the case
9105 where an ASL namepath consists of a single parent prefix (
9107 ) with no trailing name segments.
9109 The compiler has been successfully generated with a 64-bit C
9115 ----------------------------------------
9116 Summary of changes for this label: 12_18_01
9120 Enhanced blacklist with reason and severity fields. Any table's
9121 signature may now be used to identify a blacklisted system.
9123 Call _PIC control method to inform the firmware which interrupt
9124 model the OS is using. Turn on any disabled link devices.
9126 Cleaned up busmgr /proc error handling (Andreas Dilger)
9128 2) ACPI CA Core Subsystem:
9130 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
9133 Completed implementation of the ACPI 2.0 "Continue",
9134 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
9135 operators. All new ACPI 2.0 operators are now implemented in both
9136 the ASL compiler and the AML interpreter. The only remaining ACPI
9137 2.0 task is support for the String data type in the DerefOf
9138 operator. Fixed a problem with AcquireMutex where the status code
9139 was lost if the caller had to actually wait for the mutex.
9141 Increased the maximum ASL Field size from 64K bits to 4G bits.
9143 Completed implementation of the external Global Lock interfaces --
9144 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
9145 Handler parameters were added.
9147 Completed another pass at removing warnings and issues when
9148 compiling with 64-bit compilers. The code now compiles cleanly
9149 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
9150 add and subtract (diff) macros have changed considerably.
9153 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
9154 64-bit platforms, 32-bits on all others. This type is used
9155 wherever memory allocation and/or the C sizeof() operator is used,
9156 and affects the OSL memory allocation interfaces AcpiOsAllocate
9157 and AcpiOsCallocate.
9159 Implemented sticky user breakpoints in the AML debugger.
9161 Code and Data Size: Current core subsystem library sizes are shown
9162 below. These are the code and data sizes for the acpica.lib
9163 produced by the Microsoft Visual C++ 6.0 compiler, and these
9164 values do not include any ACPI driver or OSPM code. The debug
9165 version of the code includes the debug output trace mechanism and
9166 has a larger code and data size. Note that these values will vary
9167 depending on the efficiency of the compiler and the compiler
9168 options used during generation.
9170 Previous Release (12_05_01)
9171 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
9172 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
9174 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
9175 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
9177 3) ASL Compiler, version X2034:
9179 Now checks for (and generates an error if detected) the use of a
9180 Break or Continue statement without an enclosing While statement.
9183 Successfully generated the compiler with the Intel 64-bit C
9186 ----------------------------------------
9187 Summary of changes for this label: 12_05_01
9189 1) ACPI CA Core Subsystem:
9191 The ACPI 2.0 CopyObject operator is fully implemented. This
9192 operator creates a new copy of an object (and is also used to
9193 bypass the "implicit conversion" mechanism of the Store operator.)
9195 The ACPI 2.0 semantics for the SizeOf operator are fully
9196 implemented. The change is that performing a SizeOf on a
9197 reference object causes an automatic dereference of the object to
9198 tha actual value before the size is evaluated. This behavior was
9199 undefined in ACPI 1.0.
9201 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
9202 have been implemented. The interrupt polarity and mode are now
9205 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
9206 appearing in Package objects were not properly converted to
9207 integers when the internal Package was converted to an external
9208 object (via the AcpiEvaluateObject interface.)
9210 Fixed a problem with the namespace object deletion mechanism for
9211 objects created by control methods. There were two parts to this
9212 problem: 1) Objects created during the initialization phase method
9213 parse were not being deleted, and 2) The object owner ID mechanism
9214 to track objects was broken.
9216 Fixed a problem where the use of the ASL Scope operator within a
9217 control method would result in an invalid opcode exception.
9219 Fixed a problem introduced in the previous label where the buffer
9220 length required for the _PRT structure was not being returned
9223 Code and Data Size: Current core subsystem library sizes are shown
9224 below. These are the code and data sizes for the acpica.lib
9225 produced by the Microsoft Visual C++ 6.0 compiler, and these
9226 values do not include any ACPI driver or OSPM code. The debug
9227 version of the code includes the debug output trace mechanism and
9228 has a larger code and data size. Note that these values will vary
9229 depending on the efficiency of the compiler and the compiler
9230 options used during generation.
9232 Previous Release (11_20_01)
9233 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
9234 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
9237 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
9238 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
9242 Updated all files to apply cleanly against 2.4.16.
9244 Added basic PCI Interrupt Routing Table (PRT) support for IA32
9245 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
9246 version supports both static and dyanmic PRT entries, but dynamic
9247 entries are treated as if they were static (not yet
9248 reconfigurable). Architecture- specific code to use this data is
9249 absent on IA32 but should be available shortly.
9251 Changed the initialization sequence to start the ACPI interpreter
9252 (acpi_init) prior to initialization of the PCI driver (pci_init)
9253 in init/main.c. This ordering is required to support PRT and
9254 facilitate other (future) enhancement. A side effect is that the
9255 ACPI bus driver and certain device drivers can no longer be loaded
9258 Modified the 'make menuconfig' options to allow PCI Interrupt
9259 Routing support to be included without the ACPI Bus and other
9262 3) ASL Compiler, version X2033:
9264 Fixed some issues with the use of the new CopyObject and
9265 DataTableRegion operators. Both are fully functional.
9267 ----------------------------------------
9268 Summary of changes for this label: 11_20_01
9270 20 November 2001. Summary of changes for this release.
9272 1) ACPI CA Core Subsystem:
9274 Updated Index support to match ACPI 2.0 semantics. Storing a
9275 Integer, String, or Buffer to an Index of a Buffer will store only
9276 the least-significant byte of the source to the Indexed buffer
9277 byte. Multiple writes are not performed.
9279 Fixed a problem where the access type used in an AccessAs ASL
9280 operator was not recorded correctly into the field object.
9282 Fixed a problem where ASL Event objects were created in a
9283 signalled state. Events are now created in an unsignalled state.
9285 The internal object cache is now purged after table loading and
9286 initialization to reduce the use of dynamic kernel memory -- on
9287 the assumption that object use is greatest during the parse phase
9288 of the entire table (versus the run-time use of individual control
9291 ACPI 2.0 variable-length packages are now fully operational.
9293 Code and Data Size: Code and Data optimizations have permitted new
9294 feature development with an actual reduction in the library size.
9295 Current core subsystem library sizes are shown below. These are
9296 the code and data sizes for the acpica.lib produced by the
9297 Microsoft Visual C++ 6.0 compiler, and these values do not include
9298 any ACPI driver or OSPM code. The debug version of the code
9299 includes the debug output trace mechanism and has a larger code
9300 and data size. Note that these values will vary depending on the
9301 efficiency of the compiler and the compiler options used during
9304 Previous Release (11_09_01):
9305 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
9306 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
9309 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
9310 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
9314 Enhanced the ACPI boot-time initialization code to allow the use
9315 of Local APIC tables for processor enumeration on IA-32, and to
9316 pave the way for a fully MPS-free boot (on SMP systems) in the
9317 near future. This functionality replaces
9318 arch/i386/kernel/acpitables.c, which was introduced in an earlier
9319 2.4.15-preX release. To enable this feature you must add
9320 "acpi_boot=on" to the kernel command line -- see the help entry
9321 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
9324 Restructured the configuration options to allow boot-time table
9325 parsing support without inclusion of the ACPI Interpreter (and
9328 NOTE: This release does not include fixes for the reported events,
9329 power-down, and thermal passive cooling issues (coming soon).
9333 Added additional typechecking for Fields within restricted access
9334 Operation Regions. All fields within EC and CMOS regions must be
9335 declared with ByteAcc. All fields withing SMBus regions must be
9336 declared with the BufferAcc access type.
9338 Fixed a problem where the listing file output of control methods
9339 no longer interleaved the actual AML code with the ASL source
9345 ----------------------------------------
9346 Summary of changes for this label: 11_09_01
9348 1) ACPI CA Core Subsystem:
9350 Implemented ACPI 2.0-defined support for writes to fields with a
9351 Buffer, String, or Integer source operand that is smaller than the
9352 target field. In these cases, the source operand is zero-extended
9353 to fill the target field.
9355 Fixed a problem where a Field starting bit offset (within the
9356 parent operation region) was calculated incorrectly if the
9358 alignment of the field differed from the access width. This
9359 affected CreateWordField, CreateDwordField, CreateQwordField, and
9360 possibly other fields that use the "AccessAny" keyword.
9362 Fixed a problem introduced in the 11_02_01 release where indirect
9363 stores through method arguments did not operate correctly.
9367 Implemented boot-time ACPI table parsing support
9368 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
9369 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
9370 legacy BIOS interfaces (e.g. MPS) for the configuration of system
9371 processors, memory, and interrupts during setup_arch(). Note that
9372 this patch does not include the required architecture-specific
9373 changes required to apply this information -- subsequent patches
9374 will be posted for both IA32 and IA64 to achieve this.
9376 Added low-level sleep support for IA32 platforms, courtesy of Pat
9377 Mochel. This allows IA32 systems to transition to/from various
9378 sleeping states (e.g. S1, S3), although the lack of a centralized
9379 driver model and power-manageable drivers will prevent its
9380 (successful) use on most systems.
9382 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
9383 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
9384 tables" option, etc.
9386 Increased the default timeout for the EC driver from 1ms to 10ms
9387 (1000 cycles of 10us) to try to address AE_TIME errors during EC
9390 ----------------------------------------
9391 Summary of changes for this label: 11_02_01
9393 1) ACPI CA Core Subsystem:
9395 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
9396 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
9399 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
9400 changes to support ACPI 2.0 Qword field access. Read/Write
9401 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
9402 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
9403 the value parameter for the address space handler interface is now
9404 an ACPI_INTEGER. OSL implementations of these interfaces must now
9405 handle the case where the Width parameter is 64.
9407 Index Fields: Fixed a problem where unaligned bit assembly and
9408 disassembly for IndexFields was not supported correctly.
9410 Index and Bank Fields: Nested Index and Bank Fields are now
9411 supported. During field access, a check is performed to ensure
9412 that the value written to an Index or Bank register is not out of
9413 the range of the register. The Index (or Bank) register is
9414 written before each access to the field data. Future support will
9415 include allowing individual IndexFields to be wider than the
9418 Fields: Fixed a problem where the AML interpreter was incorrectly
9419 attempting to write beyond the end of a Field/OpRegion. This was
9420 a boundary case that occurred when a DWORD field was written to a
9421 BYTE access OpRegion, forcing multiple writes and causing the
9422 interpreter to write one datum too many.
9424 Fields: Fixed a problem with Field/OpRegion access where the
9425 starting bit address of a field was incorrectly calculated if the
9426 current access type was wider than a byte (WordAcc, DwordAcc, or
9429 Fields: Fixed a problem where forward references to individual
9430 FieldUnits (individual Field names within a Field definition) were
9431 not resolved during the AML table load.
9433 Fields: Fixed a problem where forward references from a Field
9434 definition to the parent Operation Region definition were not
9435 resolved during the AML table load.
9437 Fields: Duplicate FieldUnit names within a scope are now detected
9438 during AML table load.
9440 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
9441 returned an incorrect name for the root node.
9443 Code and Data Size: Code and Data optimizations have permitted new
9444 feature development with an actual reduction in the library size.
9445 Current core subsystem library sizes are shown below. These are
9446 the code and data sizes for the acpica.lib produced by the
9447 Microsoft Visual C++ 6.0 compiler, and these values do not include
9448 any ACPI driver or OSPM code. The debug version of the code
9449 includes the debug output trace mechanism and has a larger code
9450 and data size. Note that these values will vary depending on the
9451 efficiency of the compiler and the compiler options used during
9454 Previous Release (10_18_01):
9455 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
9456 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
9459 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
9460 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
9464 Improved /proc processor output (Pavel Machek) Re-added
9465 MODULE_LICENSE("GPL") to all modules.
9467 3) ASL Compiler version X2030:
9469 Duplicate FieldUnit names within a scope are now detected and
9474 Programmer Reference updated to reflect OSL and address space
9475 handler interface changes described above.
9477 ----------------------------------------
9478 Summary of changes for this label: 10_18_01
9480 ACPI CA Core Subsystem:
9482 Fixed a problem with the internal object reference count mechanism
9483 that occasionally caused premature object deletion. This resolves
9484 all of the outstanding problem reports where an object is deleted
9485 in the middle of an interpreter evaluation. Although this problem
9486 only showed up in rather obscure cases, the solution to the
9487 problem involved an adjustment of all reference counts involving
9488 objects attached to namespace nodes.
9490 Fixed a problem with Field support in the interpreter where
9491 writing to an aligned field whose length is an exact multiple (2
9492 or greater) of the field access granularity would cause an attempt
9493 to write beyond the end of the field.
9495 The top level AML opcode execution functions within the
9496 interpreter have been renamed with a more meaningful and
9497 consistent naming convention. The modules exmonad.c and
9498 exdyadic.c were eliminated. New modules are exoparg1.c,
9499 exoparg2.c, exoparg3.c, and exoparg6.c.
9501 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
9503 Fixed a problem where the AML debugger was causing some internal
9504 objects to not be deleted during subsystem termination.
9506 Fixed a problem with the external AcpiEvaluateObject interface
9507 where the subsystem would fault if the named object to be
9508 evaluated refered to a constant such as Zero, Ones, etc.
9510 Fixed a problem with IndexFields and BankFields where the
9511 subsystem would fault if the index, data, or bank registers were
9512 not defined in the same scope as the field itself.
9514 Added printf format string checking for compilers that support
9515 this feature. Corrected more than 50 instances of issues with
9516 format specifiers within invocations of ACPI_DEBUG_PRINT
9517 throughout the core subsystem code.
9519 The ASL "Revision" operator now returns the ACPI support level
9520 implemented in the core - the value "2" since the ACPI 2.0 support
9521 is more than 50% implemented.
9523 Enhanced the output of the AML debugger "dump namespace" command
9524 to output in a more human-readable form.
9526 Current core subsystem library code sizes are shown below. These
9528 are the code and data sizes for the acpica.lib produced by the
9529 Microsoft Visual C++ 6.0 compiler, and these values do not include
9530 any ACPI driver or OSPM code. The debug version of the code
9531 includes the full debug trace mechanism -- leading to a much
9533 larger code and data size. Note that these values will vary
9534 depending on the efficiency of the compiler and the compiler
9535 options used during generation.
9537 Previous Label (09_20_01):
9538 Non-Debug Version: 65K Code, 5K Data, 70K Total
9539 Debug Version: 138K Code, 58K Data, 196K Total
9543 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
9544 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
9548 Implemented a "Bad BIOS Blacklist" to track machines that have
9549 known ASL/AML problems.
9551 Enhanced the /proc interface for the thermal zone driver and added
9552 support for _HOT (the critical suspend trip point). The 'info'
9553 file now includes threshold/policy information, and allows setting
9554 of _SCP (cooling preference) and _TZP (polling frequency) values
9555 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
9556 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
9557 preference to the passive/quiet mode (if supported by the ASL).
9559 Implemented a workaround for a gcc bug that resuted in an OOPs
9560 when loading the control method battery driver.
9562 ----------------------------------------
9563 Summary of changes for this label: 09_20_01
9565 ACPI CA Core Subsystem:
9567 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
9568 modified to allow individual GPE levels to be flagged as wake-
9569 enabled (i.e., these GPEs are to remain enabled when the platform
9572 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
9573 support wake-enabled GPEs. This means that upon entering the
9574 sleep state, all GPEs that are not wake-enabled are disabled.
9575 When leaving the sleep state, these GPEs are reenabled.
9577 A local double-precision divide/modulo module has been added to
9578 enhance portability to OS kernels where a 64-bit math library is
9579 not available. The new module is "utmath.c".
9581 Several optimizations have been made to reduce the use of CPU
9582 stack. Originally over 2K, the maximum stack usage is now below
9583 2K at 1860 bytes (1.82k)
9585 Fixed a problem with the AcpiGetFirmwareTable interface where the
9586 root table pointer was not mapped into a logical address properly.
9588 Fixed a problem where a NULL pointer was being dereferenced in the
9589 interpreter code for the ASL Notify operator.
9591 Fixed a problem where the use of the ASL Revision operator
9592 returned an error. This operator now returns the current version
9593 of the ACPI CA core subsystem.
9595 Fixed a problem where objects passed as control method parameters
9596 to AcpiEvaluateObject were always deleted at method termination.
9597 However, these objects may end up being stored into the namespace
9598 by the called method. The object reference count mechanism was
9599 applied to these objects instead of a force delete.
9601 Fixed a problem where static strings or buffers (contained in the
9602 AML code) that are declared as package elements within the ASL
9603 code could cause a fault because the interpreter would attempt to
9604 delete them. These objects are now marked with the "static
9605 object" flag to prevent any attempt to delete them.
9607 Implemented an interpreter optimization to use operands directly
9608 from the state object instead of extracting the operands to local
9609 variables. This reduces stack use and code size, and improves
9612 The module exxface.c was eliminated as it was an unnecessary extra
9615 Current core subsystem library code sizes are shown below. These
9616 are the code and data sizes for the acpica.lib produced by the
9617 Microsoft Visual C++ 6.0 compiler, and these values do not include
9618 any ACPI driver or OSPM code. The debug version of the code
9619 includes the full debug trace mechanism -- leading to a much
9620 larger code and data size. Note that these values will vary
9621 depending on the efficiency of the compiler and the compiler
9622 options used during generation.
9624 Non-Debug Version: 65K Code, 5K Data, 70K Total
9625 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
9626 Total (Previously 195K)
9630 Support for ACPI 2.0 64-bit integers has been added. All ACPI
9631 Integer objects are now 64 bits wide
9633 All Acpi data types and structures are now in lower case. Only
9634 Acpi macros are upper case for differentiation.
9638 Changes to the external interfaces as described above.
9640 ----------------------------------------
9641 Summary of changes for this label: 08_31_01
9643 ACPI CA Core Subsystem:
9645 A bug with interpreter implementation of the ASL Divide operator
9646 was found and fixed. The implicit function return value (not the
9647 explicit store operands) was returning the remainder instead of
9648 the quotient. This was a longstanding bug and it fixes several
9649 known outstanding issues on various platforms.
9651 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
9652 been further optimized for size. There are 700 invocations of the
9653 DEBUG_PRINT macro alone, so each optimization reduces the size of
9654 the debug version of the subsystem significantly.
9656 A stack trace mechanism has been implemented. The maximum stack
9657 usage is about 2K on 32-bit platforms. The debugger command "stat
9658 stack" will display the current maximum stack usage.
9660 All public symbols and global variables within the subsystem are
9661 now prefixed with the string "Acpi". This keeps all of the
9662 symbols grouped together in a kernel map, and avoids conflicts
9663 with other kernel subsystems.
9665 Most of the internal fixed lookup tables have been moved into the
9666 code segment via the const operator.
9668 Several enhancements have been made to the interpreter to both
9669 reduce the code size and improve performance.
9671 Current core subsystem library code sizes are shown below. These
9672 are the code and data sizes for the acpica.lib produced by the
9673 Microsoft Visual C++ 6.0 compiler, and these values do not include
9674 any ACPI driver or OSPM code. The debug version of the code
9675 includes the full debug trace mechanism which contains over 700
9676 invocations of the DEBUG_PRINT macro, 500 function entry macro
9677 invocations, and over 900 function exit macro invocations --
9678 leading to a much larger code and data size. Note that these
9679 values will vary depending on the efficiency of the compiler and
9680 the compiler options used during generation.
9682 Non-Debug Version: 64K Code, 5K Data, 69K Total
9683 Debug Version: 137K Code, 58K Data, 195K Total
9687 Implemented wbinvd() macro, pending a kernel-wide definition.
9689 Fixed /proc/acpi/event to handle poll() and short reads.
9691 ASL Compiler, version X2026:
9693 Fixed a problem introduced in the previous label where the AML
9695 code emitted for package objects produced packages with zero
9698 ----------------------------------------
9699 Summary of changes for this label: 08_16_01
9701 ACPI CA Core Subsystem:
9703 The following ACPI 2.0 ASL operators have been implemented in the
9704 AML interpreter (These are already supported by the Intel ASL
9705 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
9706 ToBuffer. Support for 64-bit AML constants is implemented in the
9707 AML parser, debugger, and disassembler.
9709 The internal memory tracking mechanism (leak detection code) has
9710 been upgraded to reduce the memory overhead (a separate tracking
9711 block is no longer allocated for each memory allocation), and now
9712 supports all of the internal object caches.
9714 The data structures and code for the internal object caches have
9715 been coelesced and optimized so that there is a single cache and
9716 memory list data structure and a single group of functions that
9717 implement generic cache management. This has reduced the code
9718 size in both the debug and release versions of the subsystem.
9720 The DEBUG_PRINT macro(s) have been optimized for size and replaced
9721 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
9722 different, because it generates a single call to an internal
9723 function. This results in a savings of about 90 bytes per
9724 invocation, resulting in an overall code and data savings of about
9725 16% in the debug version of the subsystem.
9729 Fixed C3 disk corruption problems and re-enabled C3 on supporting
9732 Integrated low-level sleep code by Patrick Mochel.
9734 Further tweaked source code Linuxization.
9740 Support for ACPI 2.0 variable length packages is fixed/completed.
9742 Fixed a problem where the optional length parameter for the ACPI
9743 2.0 ToString operator.
9745 Fixed multiple extraneous error messages when a syntax error is
9746 detected within the declaration line of a control method.
9748 ----------------------------------------
9749 Summary of changes for this label: 07_17_01
9751 ACPI CA Core Subsystem:
9753 Added a new interface named AcpiGetFirmwareTable to obtain any
9754 ACPI table via the ACPI signature. The interface can be called at
9755 any time during kernel initialization, even before the kernel
9756 virtual memory manager is initialized and paging is enabled. This
9757 allows kernel subsystems to obtain ACPI tables very early, even
9758 before the ACPI CA subsystem is initialized.
9760 Fixed a problem where Fields defined with the AnyAcc attribute
9761 could be resolved to the incorrect address under the following
9762 conditions: 1) the field width is larger than 8 bits and 2) the
9763 parent operation region is not defined on a DWORD boundary.
9765 Fixed a problem where the interpreter is not being locked during
9766 namespace initialization (during execution of the _INI control
9767 methods), causing an error when an attempt is made to release it
9770 ACPI 2.0 support in the AML Interpreter has begun and will be
9771 ongoing throughout the rest of this year. In this label, The Mod
9772 operator is implemented.
9774 Added a new data type to contain full PCI addresses named
9775 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
9776 and Function values.
9780 Enhanced the Linux version of the source code to change most
9781 capitalized ACPI type names to lowercase. For example, all
9782 instances of ACPI_STATUS are changed to acpi_status. This will
9783 result in a large diff, but the change is strictly cosmetic and
9784 aligns the CA code closer to the Linux coding standard.
9788 The interfaces to the PCI configuration space have been changed to
9789 add the PCI Segment number and to split the single 32-bit combined
9790 DeviceFunction field into two 16-bit fields. This was
9791 accomplished by moving the four values that define an address in
9792 PCI configuration space (segment, bus, device, and function) to
9793 the new ACPI_PCI_ID structure.
9795 The changes to the PCI configuration space interfaces led to a
9796 reexamination of the complete set of address space access
9797 interfaces for PCI, I/O, and Memory. The previously existing 18
9798 interfaces have proven difficult to maintain (any small change
9799 must be propagated across at least 6 interfaces) and do not easily
9800 allow for future expansion to 64 bits if necessary. Also, on some
9801 systems, it would not be appropriate to demultiplex the access
9802 width (8, 16, 32,or 64) before calling the OSL if the
9803 corresponding native OS interfaces contain a similar access width
9804 parameter. For these reasons, the 18 address space interfaces
9805 have been replaced by these 6 new ones:
9807 AcpiOsReadPciConfiguration
9808 AcpiOsWritePciConfiguration
9814 Added a new interface named AcpiOsGetRootPointer to allow the OSL
9815 to perform the platform and/or OS-specific actions necessary to
9816 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
9817 interface will simply call down to the CA core to perform the low-
9818 memory search for the table. On IA-64, the RSDP is obtained from
9819 EFI. Migrating this interface to the OSL allows the CA core to
9821 remain OS and platform independent.
9823 Added a new interface named AcpiOsSignal to provide a generic
9824 "function code and pointer" interface for various miscellaneous
9825 signals and notifications that must be made to the host OS. The
9826 first such signals are intended to support the ASL Fatal and
9827 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
9828 interface has been obsoleted.
9830 The definition of the AcpiFormatException interface has been
9831 changed to simplify its use. The caller no longer must supply a
9832 buffer to the call; A pointer to a const string is now returned
9833 directly. This allows the call to be easily used in printf
9834 statements, etc. since the caller does not have to manage a local
9838 ASL Compiler, Version X2025:
9840 The ACPI 2.0 Switch/Case/Default operators have been implemented
9841 and are fully functional. They will work with all ACPI 1.0
9842 interpreters, since the operators are simply translated to If/Else
9845 The ACPI 2.0 ElseIf operator is implemented and will also work
9846 with 1.0 interpreters, for the same reason.
9848 Implemented support for ACPI 2.0 variable-length packages. These
9849 packages have a separate opcode, and their size is determined by
9850 the interpreter at run-time.
9852 Documentation The ACPI CA Programmer Reference has been updated to
9853 reflect the new interfaces and changes to existing interfaces.
9855 ------------------------------------------
9856 Summary of changes for this label: 06_15_01
9858 ACPI CA Core Subsystem:
9860 Fixed a problem where a DWORD-accessed field within a Buffer
9861 object would get its byte address inadvertently rounded down to
9862 the nearest DWORD. Buffers are always Byte-accessible.
9864 ASL Compiler, version X2024:
9866 Fixed a problem where the Switch() operator would either fault or
9867 hang the compiler. Note however, that the AML code for this ACPI
9868 2.0 operator is not yet implemented.
9870 Compiler uses the new AcpiOsGetTimer interface to obtain compile
9873 Implementation of the CreateField operator automatically converts
9874 a reference to a named field within a resource descriptor from a
9875 byte offset to a bit offset if required.
9877 Added some missing named fields from the resource descriptor
9878 support. These are the names that are automatically created by the
9879 compiler to reference fields within a descriptor. They are only
9880 valid at compile time and are not passed through to the AML
9883 Resource descriptor named fields are now typed as Integers and
9884 subject to compile-time typechecking when used in expressions.
9886 ------------------------------------------
9887 Summary of changes for this label: 05_18_01
9889 ACPI CA Core Subsystem:
9891 Fixed a couple of problems in the Field support code where bits
9892 from adjacent fields could be returned along with the proper field
9893 bits. Restructured the field support code to improve performance,
9894 readability and maintainability.
9896 New DEBUG_PRINTP macro automatically inserts the procedure name
9897 into the output, saving hundreds of copies of procedure name
9898 strings within the source, shrinking the memory footprint of the
9899 debug version of the core subsystem.
9901 Source Code Structure:
9903 The source code directory tree was restructured to reflect the
9904 current organization of the component architecture. Some files
9905 and directories have been moved and/or renamed.
9909 Fixed leaking kacpidpc processes.
9911 Fixed queueing event data even when /proc/acpi/event is not
9914 ASL Compiler, version X2020:
9916 Memory allocation performance enhancement - over 24X compile time
9917 improvement on large ASL files. Parse nodes and namestring
9918 buffers are now allocated from a large internal compiler buffer.
9920 The temporary .SRC file is deleted unless the "-s" option is
9923 The "-d" debug output option now sends all output to the .DBG file
9924 instead of the console.
9926 "External" second parameter is now optional
9928 "ElseIf" syntax now properly allows the predicate
9930 Last operand to "Load" now recognized as a Target operand
9932 Debug object can now be used anywhere as a normal object.
9934 ResourceTemplate now returns an object of type BUFFER
9936 EISAID now returns an object of type INTEGER
9938 "Index" now works with a STRING operand
9940 "LoadTable" now accepts optional parameters
9942 "ToString" length parameter is now optional
9944 "Interrupt (ResourceType," parse error fixed.
9946 "Register" with a user-defined region space parse error fixed
9948 Escaped backslash at the end of a string ("\\") scan/parse error
9951 "Revision" is now an object of type INTEGER.
9955 ------------------------------------------
9956 Summary of changes for this label: 05_02_01
9960 /proc/acpi/event now blocks properly.
9962 Removed /proc/sys/acpi. You can still dump your DSDT from
9965 ACPI CA Core Subsystem:
9967 Fixed a problem introduced in the previous label where some of the
9968 "small" resource descriptor types were not recognized.
9970 Improved error messages for the case where an ASL Field is outside
9971 the range of the parent operation region.
9973 ASL Compiler, version X2018:
9976 Added error detection for ASL Fields that extend beyond the length
9977 of the parent operation region (only if the length of the region
9978 is known at compile time.) This includes fields that have a
9979 minimum access width that is smaller than the parent region, and
9980 individual field units that are partially or entirely beyond the
9981 extent of the parent.
9985 ------------------------------------------
9986 Summary of changes for this label: 04_27_01
9988 ACPI CA Core Subsystem:
9990 Fixed a problem where the namespace mutex could be released at the
9991 wrong time during execution of AcpiRemoveAddressSpaceHandler.
9993 Added optional thread ID output for debug traces, to simplify
9994 debugging of multiple threads. Added context switch notification
9995 when the debug code realizes that a different thread is now
9996 executing ACPI code.
9998 Some additional external data types have been prefixed with the
9999 string "ACPI_" for consistency. This may effect existing code.
10000 The data types affected are the external callback typedefs - e.g.,
10002 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
10006 Fixed an issue with the OSL semaphore implementation where a
10007 thread was waking up with an error from receiving a SIGCHLD
10010 Linux version of ACPI CA now uses the system C library for string
10011 manipulation routines instead of a local implementation.
10013 Cleaned up comments and removed TBDs.
10015 ASL Compiler, version X2017:
10017 Enhanced error detection and reporting for all file I/O
10022 Programmer Reference updated to version 1.06.
10026 ------------------------------------------
10027 Summary of changes for this label: 04_13_01
10029 ACPI CA Core Subsystem:
10031 Restructured support for BufferFields and RegionFields.
10032 BankFields support is now fully operational. All known 32-bit
10033 limitations on field sizes have been removed. Both BufferFields
10034 and (Operation) RegionFields are now supported by the same field
10037 Resource support now supports QWORD address and IO resources. The
10038 16/32/64 bit address structures and the Extended IRQ structure
10039 have been changed to properly handle Source Resource strings.
10041 A ThreadId of -1 is now used to indicate a "mutex not acquired"
10042 condition internally and must never be returned by AcpiOsThreadId.
10043 This reserved value was changed from 0 since Unix systems allow a
10048 Driver code reorganized to enhance portability
10050 Added a kernel configuration option to control ACPI_DEBUG
10052 Fixed the EC driver to honor _GLK.
10054 ASL Compiler, version X2016:
10056 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
10057 address space was set to 0, not 0x7f as it should be.
10059 ------------------------------------------
10060 Summary of changes for this label: 03_13_01
10062 ACPI CA Core Subsystem:
10064 During ACPI initialization, the _SB_._INI method is now run if
10067 Notify handler fix - notifies are deferred until the parent method
10068 completes execution. This fixes the "mutex already acquired"
10069 issue seen occasionally.
10071 Part of the "implicit conversion" rules in ACPI 2.0 have been
10072 found to cause compatibility problems with existing ASL/AML. The
10073 convert "result-to-target-type" implementation has been removed
10074 for stores to method Args and Locals. Source operand conversion
10075 is still fully implemented. Possible changes to ACPI 2.0
10076 specification pending.
10078 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
10081 Fix for compiler warnings for 64-bit compiles.
10085 /proc output aligned for easier parsing.
10087 Release-version compile problem fixed.
10089 New kernel configuration options documented in Configure.help.
10091 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
10096 Power resource driver integrated with bus manager.
10098 Fixed kernel fault during active cooling for thermal zones.
10102 The source code tree has been restructured.
10106 ------------------------------------------
10107 Summary of changes for this label: 03_02_01
10109 Linux OS Services Layer (OSL):
10111 Major revision of all Linux-specific code.
10113 Modularized all ACPI-specific drivers.
10115 Added new thermal zone and power resource drivers.
10117 Revamped /proc interface (new functionality is under /proc/acpi).
10119 New kernel configuration options.
10121 Linux known issues:
10123 New kernel configuration options not documented in Configure.help
10127 Module dependencies not currently implemented. If used, they
10128 should be loaded in this order: busmgr, power, ec, system,
10129 processor, battery, ac_adapter, button, thermal.
10131 Modules will not load if CONFIG_MODVERSION is set.
10133 IBM 600E - entering S5 may reboot instead of shutting down.
10135 IBM 600E - Sleep button may generate "Invalid <NULL> context"
10138 Some systems may fail with "execution mutex already acquired"
10141 ACPI CA Core Subsystem:
10143 Added a new OSL Interface, AcpiOsGetThreadId. This was required
10144 for the deadlock detection code. Defined to return a non-zero, 32-
10145 bit thread ID for the currently executing thread. May be a non-
10146 zero constant integer on single-thread systems.
10148 Implemented deadlock detection for internal subsystem mutexes. We
10149 may add conditional compilation for this code (debug only) later.
10151 ASL/AML Mutex object semantics are now fully supported. This
10152 includes multiple acquires/releases by owner and support for the
10154 Mutex SyncLevel parameter.
10156 A new "Force Release" mechanism automatically frees all ASL
10157 Mutexes that have been acquired but not released when a thread
10158 exits the interpreter. This forces conformance to the ACPI spec
10159 ("All mutexes must be released when an invocation exits") and
10160 prevents deadlocked ASL threads. This mechanism can be expanded
10161 (later) to monitor other resource acquisitions if OEM ASL code
10162 continues to misbehave (which it will).
10164 Several new ACPI exception codes have been added for the Mutex
10167 Recursive method calls are now allowed and supported (the ACPI
10168 spec does in fact allow recursive method calls.) The number of
10169 recursive calls is subject to the restrictions imposed by the
10170 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
10173 Implemented support for the SyncLevel parameter for control
10174 methods (ACPI 2.0 feature)
10176 Fixed a deadlock problem when multiple threads attempted to use
10179 Fixed a problem where the string length of a String package
10180 element was not always set in a package returned from
10181 AcpiEvaluateObject.
10183 Fixed a problem where the length of a String package element was
10184 not always included in the length of the overall package returned
10185 from AcpiEvaluateObject.
10187 Added external interfaces (Acpi*) to the ACPI debug memory
10188 manager. This manager keeps a list of all outstanding
10189 allocations, and can therefore detect memory leaks and attempts to
10190 free memory blocks more than once. Useful for code such as the
10191 power manager, etc. May not be appropriate for device drivers.
10192 Performance with the debug code enabled is slow.
10194 The ACPI Global Lock is now an optional hardware element.
10196 ASL Compiler Version X2015:
10198 Integrated changes to allow the compiler to be generated on
10199 multiple platforms.
10201 Linux makefile added to generate the compiler on Linux
10205 All platform-specific headers have been moved to their own
10206 subdirectory, Include/Platform.
10208 New source file added, Interpreter/ammutex.c
10210 New header file, Include/acstruct.h
10214 The programmer reference has been updated for the following new
10215 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
10217 ------------------------------------------
10218 Summary of changes for this label: 02_08_01
10220 Core ACPI CA Subsystem: Fixed a problem where an error was
10221 incorrectly returned if the return resource buffer was larger than
10222 the actual data (in the resource interfaces).
10224 References to named objects within packages are resolved to the
10226 full pathname string before packages are returned directly (via
10227 the AcpiEvaluateObject interface) or indirectly via the resource
10230 Linux OS Services Layer (OSL):
10232 Improved /proc battery interface.
10235 Added C-state debugging output and other miscellaneous fixes.
10237 ASL Compiler Version X2014:
10239 All defined method arguments can now be used as local variables,
10240 including the ones that are not actually passed in as parameters.
10241 The compiler tracks initialization of the arguments and issues an
10242 exception if they are used without prior assignment (just like
10245 The -o option now specifies a filename prefix that is used for all
10246 output files, including the AML output file. Otherwise, the
10247 default behavior is as follows: 1) the AML goes to the file
10248 specified in the DSDT. 2) all other output files use the input
10249 source filename as the base.
10251 ------------------------------------------
10252 Summary of changes for this label: 01_25_01
10254 Core ACPI CA Subsystem: Restructured the implementation of object
10255 store support within the interpreter. This includes support for
10256 the Store operator as well as any ASL operators that include a
10259 Partially implemented support for Implicit Result-to-Target
10260 conversion. This is when a result object is converted on the fly
10261 to the type of an existing target object. Completion of this
10262 support is pending further analysis of the ACPI specification
10263 concerning this matter.
10265 CPU-specific code has been removed from the subsystem (hardware
10268 New Power Management Timer functions added
10270 Linux OS Services Layer (OSL): Moved system state transition code
10271 to the core, fixed it, and modified Linux OSL accordingly.
10273 Fixed C2 and C3 latency calculations.
10276 We no longer use the compilation date for the version message on
10277 initialization, but retrieve the version from AcpiGetSystemInfo().
10279 Incorporated for fix Sony VAIO machines.
10281 Documentation: The Programmer Reference has been updated and
10285 ASL Compiler: Version X2013: Fixed a problem where the line
10286 numbering and error reporting could get out of sync in the
10287 presence of multiple include files.
10289 ------------------------------------------
10290 Summary of changes for this label: 01_15_01
10292 Core ACPI CA Subsystem:
10294 Implemented support for type conversions in the execution of the
10295 ASL Concatenate operator (The second operand is converted to
10296 match the type of the first operand before concatenation.)
10298 Support for implicit source operand conversion is partially
10299 implemented. The ASL source operand types Integer, Buffer, and
10300 String are freely interchangeable for most ASL operators and are
10301 converted by the interpreter on the fly as required. Implicit
10302 Target operand conversion (where the result is converted to the
10303 target type before storing) is not yet implemented.
10305 Support for 32-bit and 64-bit BCD integers is implemented.
10307 Problem fixed where a field read on an aligned field could cause a
10308 read past the end of the field.
10310 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
10311 does not return a value, but the caller expects one. (The ASL
10312 compiler flags this as a warning.)
10317 1. Static typechecking of all operands is implemented. This
10318 prevents the use of invalid objects (such as using a Package where
10319 an Integer is required) at compile time instead of at interpreter
10321 2. The ASL source line is printed with ALL errors and warnings.
10322 3. Bug fix for source EOF without final linefeed.
10323 4. Debug option is split into a parse trace and a namespace trace.
10324 5. Namespace output option (-n) includes initial values for
10325 integers and strings.
10326 6. Parse-only option added for quick syntax checking.
10327 7. Compiler checks for duplicate ACPI name declarations
10330 1. Relaxed typechecking to allow interchangeability between
10331 strings, integers, and buffers. These types are now converted by
10332 the interpreter at runtime.
10333 2. Compiler reports time taken by each internal subsystem in the
10337 ------------------------------------------
10338 Summary of changes for this label: 12_14_00
10342 This is the first official release of the compiler. Since the
10343 compiler requires elements of the Core Subsystem, this label
10344 synchronizes everything.
10346 ------------------------------------------
10347 Summary of changes for this label: 12_08_00
10350 Fixed a problem where named references within the ASL definition
10351 of both OperationRegions and CreateXXXFields did not work
10352 properly. The symptom was an AE_AML_OPERAND_TYPE during
10353 initialization of the region/field. This is similar (but not
10354 related internally) to the problem that was fixed in the last
10357 Implemented both 32-bit and 64-bit support for the BCD ASL
10358 functions ToBCD and FromBCD.
10360 Updated all legal headers to include "2000" in the copyright
10363 ------------------------------------------
10364 Summary of changes for this label: 12_01_00
10366 Fixed a problem where method invocations within the ASL definition
10367 of both OperationRegions and CreateXXXFields did not work
10368 properly. The symptom was an AE_AML_OPERAND_TYPE during
10369 initialization of the region/field:
10371 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
10372 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
10375 Fixed a problem where operators with more than one nested
10376 subexpression would fail. The symptoms were varied, by mostly
10377 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
10378 problem that has gone unnoticed until now.
10380 Subtract (Add (1,2), Multiply (3,4))
10382 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
10383 previous build (The prefix part of a relative path was handled
10386 Fixed a problem where Operation Region initialization failed if
10387 the operation region name was a "namepath" instead of a simple
10388 "nameseg". Symptom was an AE_NO_OPERAND error.
10390 Fixed a problem where an assignment to a local variable via the
10391 indirect RefOf mechanism only worked for the first such
10392 assignment. Subsequent assignments were ignored.
10394 ------------------------------------------
10395 Summary of changes for this label: 11_15_00
10397 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
10398 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
10399 the AML interpreter does NOT have support for the new 2.0 ASL
10400 grammar terms at this time.
10402 All ACPI hardware access is via the GAS structures in the ACPI 2.0
10405 All physical memory addresses across all platforms are now 64 bits
10406 wide. Logical address width remains dependent on the platform
10409 AcpiOsMapMemory interface changed to a 64-bit physical address.
10411 The AML interpreter integer size is now 64 bits, as per the ACPI
10414 For backwards compatibility with ACPI 1.0, ACPI tables with a
10415 revision number less than 2 use 32-bit integers only.
10417 Fixed a problem where the evaluation of OpRegion operands did not
10418 always resolve them to numbers properly.
10420 ------------------------------------------
10421 Summary of changes for this label: 10_20_00
10423 Fix for CBN_._STA issue. This fix will allow correct access to
10424 CBN_ OpRegions when the _STA returns 0x8.
10426 Support to convert ACPI constants (Ones, Zeros, One) to actual
10427 values before a package object is returned
10429 Fix for method call as predicate to if/while construct causing
10430 incorrect if/while behavior
10432 Fix for Else block package lengths sometimes calculated wrong (if
10435 Fix for Processor object length field, was always zero
10437 Table load abort if FACP sanity check fails
10439 Fix for problem with Scope(name) if name already exists
10441 Warning emitted if a named object referenced cannot be found
10442 (resolved) during method execution.
10448 ------------------------------------------
10449 Summary of changes for this label: 9_29_00
10451 New table initialization interfaces: AcpiInitializeSubsystem no
10452 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
10453 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
10454 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
10457 Note: These interface changes require changes to all existing OSDs
10459 The PCI_Config default address space handler is always installed
10460 at the root namespace object.
10462 -------------------------------------------
10463 Summary of changes for this label: 09_15_00
10465 The new initialization architecture is implemented. New
10466 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
10467 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
10469 (Namespace is automatically loaded when a table is loaded)
10471 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
10472 52 bytes to 32 bytes. There is usually one of these for every
10473 namespace object, so the memory savings is significant.
10475 Implemented just-in-time evaluation of the CreateField operators.
10477 Bug fixes for IA-64 support have been integrated.
10479 Additional code review comments have been implemented
10481 The so-called "third pass parse" has been replaced by a final walk
10482 through the namespace to initialize all operation regions (address
10483 spaces) and fields that have not yet been initialized during the
10484 execution of the various _INI and REG methods.
10486 New file - namespace/nsinit.c
10488 -------------------------------------------
10489 Summary of changes for this label: 09_01_00
10491 Namespace manager data structures have been reworked to change the
10492 primary object from a table to a single object. This has
10493 resulted in dynamic memory savings of 3X within the namespace and
10494 2X overall in the ACPI CA subsystem.
10496 Fixed problem where the call to AcpiEvFindPciRootBuses was
10497 inadvertently left commented out.
10499 Reduced the warning count when generating the source with the GCC
10502 Revision numbers added to each module header showing the
10503 SourceSafe version of the file. Please refer to this version
10504 number when giving us feedback or comments on individual modules.
10506 The main object types within the subsystem have been renamed to
10507 clarify their purpose:
10509 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
10510 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
10511 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
10513 NOTE: no changes to the initialization sequence are included in
10516 -------------------------------------------
10517 Summary of changes for this label: 08_23_00
10519 Fixed problem where TerminateControlMethod was being called
10520 multiple times per method
10522 Fixed debugger problem where single stepping caused a semaphore to
10525 Improved performance through additional parse object caching -
10526 added ACPI_EXTENDED_OP type
10528 -------------------------------------------
10529 Summary of changes for this label: 08_10_00
10531 Parser/Interpreter integration: Eliminated the creation of
10532 complete parse trees for ACPI tables and control methods.
10533 Instead, parse subtrees are created and then deleted as soon as
10534 they are processed (Either entered into the namespace or executed
10535 by the interpreter). This reduces the use of dynamic kernel
10536 memory significantly. (about 10X)
10538 Exception codes broken into classes and renumbered. Be sure to
10539 recompile all code that includes acexcep.h. Hopefully we won't
10540 have to renumber the codes again now that they are split into
10541 classes (environment, programmer, AML code, ACPI table, and
10544 Fixed some additional alignment issues in the Resource Manager
10547 Implemented semaphore tracking in the AcpiExec utility, and fixed
10548 several places where mutexes/semaphores were being unlocked
10549 without a corresponding lock operation. There are no known
10550 semaphore or mutex "leaks" at this time.
10552 Fixed the case where an ASL Return operator is used to return an
10555 -------------------------------------------
10556 Summary of changes for this label: 07_28_00
10558 Fixed a problem with the way addresses were calculated in
10559 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
10560 manifested itself when a Field was created with WordAccess or
10561 DwordAccess, but the field unit defined within the Field was less
10563 than a Word or Dword.
10565 Fixed a problem in AmlDumpOperands() module's loop to pull
10566 operands off of the operand stack to display information. The
10567 problem manifested itself as a TLB error on 64-bit systems when
10568 accessing an operand stack with two or more operands.
10570 Fixed a problem with the PCI configuration space handlers where
10571 context was getting confused between accesses. This required a
10572 change to the generic address space handler and address space
10573 setup definitions. Handlers now get both a global handler context
10574 (this is the one passed in by the user when executing
10575 AcpiInstallAddressSpaceHandler() and a specific region context
10576 that is unique to each region (For example, the _ADR, _SEG and
10577 _BBN values associated with a specific region). The generic
10578 function definitions have changed to the following:
10580 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
10581 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
10582 *HandlerContext, // This used to be void *Context void
10583 *RegionContext); // This is an additional parameter
10585 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
10586 RegionHandle, UINT32 Function, void *HandlerContext, void
10587 **RegionContext); // This used to be **ReturnContext
10589 -------------------------------------------
10590 Summary of changes for this label: 07_21_00
10592 Major file consolidation and rename. All files within the
10593 interpreter have been renamed as well as most header files. This
10594 was done to prevent collisions with existing files in the host
10595 OSs -- filenames such as "config.h" and "global.h" seem to be
10596 quite common. The VC project files have been updated. All
10597 makefiles will require modification.
10599 The parser/interpreter integration continues in Phase 5 with the
10600 implementation of a complete 2-pass parse (the AML is parsed
10601 twice) for each table; This avoids the construction of a huge
10602 parse tree and therefore reduces the amount of dynamic memory
10603 required by the subsystem. Greater use of the parse object cache
10604 means that performance is unaffected.
10606 Many comments from the two code reviews have been rolled in.
10608 The 64-bit alignment support is complete.
10610 -------------------------------------------
10611 Summary of changes for this label: 06_30_00
10613 With a nod and a tip of the hat to the technology of yesteryear,
10614 we've added support in the source code for 80 column output
10615 devices. The code is now mostly constrained to 80 columns or
10616 less to support environments and editors that 1) cannot display
10617 or print more than 80 characters on a single line, and 2) cannot
10618 disable line wrapping.
10620 A major restructuring of the namespace data structure has been
10621 completed. The result is 1) cleaner and more
10622 understandable/maintainable code, and 2) a significant reduction
10623 in the dynamic memory requirement for each named ACPI object
10626 -------------------------------------------
10627 Summary of changes for this label: 06_23_00
10629 Linux support has been added. In order to obtain approval to get
10630 the ACPI CA subsystem into the Linux kernel, we've had to make
10631 quite a few changes to the base subsystem that will affect all
10632 users (all the changes are generic and OS- independent). The
10633 effects of these global changes have been somewhat far reaching.
10634 Files have been merged and/or renamed and interfaces have been
10635 renamed. The major changes are described below.
10637 Osd* interfaces renamed to AcpiOs* to eliminate namespace
10638 pollution/confusion within our target kernels. All OSD
10639 interfaces must be modified to match the new naming convention.
10641 Files merged across the subsystem. A number of the smaller source
10642 and header files have been merged to reduce the file count and
10643 increase the density of the existing files. There are too many
10644 to list here. In general, makefiles that call out individual
10645 files will require rebuilding.
10647 Interpreter files renamed. All interpreter files now have the
10648 prefix am* instead of ie* and is*.
10650 Header files renamed: The acapi.h file is now acpixf.h. The
10651 acpiosd.h file is now acpiosxf.h. We are removing references to
10652 the acronym "API" since it is somewhat windowsy. The new name is
10653 "external interface" or xface or xf in the filenames.j
10656 All manifest constants have been forced to upper case (some were
10657 mixed case.) Also, the string "ACPI_" has been prepended to many
10658 (not all) of the constants, typedefs, and structs.
10660 The globals "DebugLevel" and "DebugLayer" have been renamed
10661 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
10663 All other globals within the subsystem are now prefixed with
10664 "AcpiGbl_" Internal procedures within the subsystem are now
10665 prefixed with "Acpi" (with only a few exceptions). The original
10666 two-letter abbreviation for the subcomponent remains after "Acpi"
10667 - for example, CmCallocate became AcpiCmCallocate.
10669 Added a source code translation/conversion utility. Used to
10670 generate the Linux source code, it can be modified to generate
10671 other types of source as well. Can also be used to cleanup
10672 existing source by removing extraneous spaces and blank lines.
10673 Found in tools/acpisrc/*
10675 OsdUnMapMemory was renamed to OsdUnmapMemory and then
10676 AcpiOsUnmapMemory. (UnMap became Unmap).
10678 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
10679 When set to one, this indicates that the caller wants to use the
10681 semaphore as a mutex, not a counting semaphore. ACPI CA uses
10682 both types. However, implementers of this call may want to use
10683 different OS primitives depending on the type of semaphore
10684 requested. For example, some operating systems provide separate
10686 "mutex" and "semaphore" interfaces - where the mutex interface is
10687 much faster because it doesn't have all the overhead of a full
10688 semaphore implementation.
10690 Fixed a deadlock problem where a method that accesses the PCI
10691 address space can block forever if it is the first access to the
10694 -------------------------------------------
10695 Summary of changes for this label: 06_02_00
10697 Support for environments that cannot handle unaligned data
10698 accesses (e.g. firmware and OS environments devoid of alignment
10699 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
10700 been added (via configurable macros) in these three areas: -
10701 Transfer of data from the raw AML byte stream is done via byte
10702 moves instead of word/dword/qword moves. - External objects are
10703 aligned within the user buffer, including package elements (sub-
10704 objects). - Conversion of name strings to UINT32 Acpi Names is now
10707 The Store operator was modified to mimic Microsoft's
10708 implementation when storing to a Buffer Field.
10710 Added a check of the BM_STS bit before entering C3.
10712 The methods subdirectory has been obsoleted and removed. A new
10713 file, cmeval.c subsumes the functionality.
10715 A 16-bit (DOS) version of AcpiExec has been developed. The
10716 makefile is under the acpiexec directory.