1 ----------------------------------------
2 31 March 2010. Summary of changes for version 20100331:
4 1) ACPI CA Core Subsystem:
6 Completed a major update for the GPE support in order to improve support for
7 shared GPEs and to simplify both host OS and ACPICA code. Added a reference
8 count mechanism to support shared GPEs that require multiple device drivers.
9 Several external interfaces have changed. One external interface has been
10 removed. One new external interface was added. Most of the GPE external
11 interfaces now use the GPE spinlock instead of the events mutex (and the
12 Flags parameter for many GPE interfaces has been removed.) See the updated
13 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore, Rafael
14 Wysocki. ACPICA BZ 831.
17 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
23 Implemented write support for DataTable operation regions. These regions are
24 defined via the DataTableRegion() operator. Previously, only read support was
25 implemented. The ACPI specification allows DataTableRegions to be read/write,
28 Implemented a new subsystem option to force a copy of the DSDT to local
29 memory. Optionally copy the entire DSDT to local memory (instead of simply
30 mapping it.) There are some (albeit very rare) BIOSs that corrupt or replace
31 the original DSDT, creating the need for this option. Default is FALSE, do
34 Implemented detection of a corrupted or replaced DSDT. This change adds
35 support to detect a DSDT that has been corrupted and/or replaced from outside
36 the OS (by firmware). This is typically catastrophic for the system, but has
37 been seen on some machines. Once this problem has been detected, the DSDT
38 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
40 Fixed two problems with AcpiReallocateRootTable during the root table copy.
41 When copying the root table to the new allocation, the length used was
42 incorrect. The new size was used instead of the current table size, meaning
43 too much data was copied. Also, the count of available slots for ACPI tables
44 was not set correctly. Alexey Starikovskiy, Bob Moore.
46 Example Code and Data Size: These are the sizes for the OS-independent
47 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
48 debug version of the code includes the debug output trace mechanism and has a
49 much larger code and data size.
52 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
53 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
55 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
56 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
58 2) iASL Compiler/Disassembler and Tools:
60 iASL: Implement limited typechecking for values returned from predefined
61 control methods. The type of any returned static (unnamed) object is now
62 validated. For example, Return(1). ACPICA BZ 786.
64 iASL: Fixed a predefined name object verification regression. Fixes a problem
65 introduced in version 20100304. An error is incorrectly generated if a
66 predefined name is declared as a static named object with a value defined
67 using the keywords "Zero", "One", or "Ones". Lin Ming.
69 iASL: Added Windows 7 support for the -g option (get local ACPI tables) by
70 reducing the requested registry access rights. ACPICA BZ 842.
72 Disassembler: fixed a possible fault when generating External() statements.
73 Introduced in commit ae7d6fd: Properly handle externals with parent-prefix
74 (carat). Fixes a string length allocation calculation. Lin Ming.
76 ----------------------------------------
77 04 March 2010. Summary of changes for version 20100304:
79 1) ACPI CA Core Subsystem:
81 Fixed a possible problem with the AML Mutex handling function
82 AcpiExReleaseMutex where the function could fault under the very rare
83 condition when the interpreter has blocked, the interpreter lock is released,
84 the interpreter is then reentered via the same thread, and attempts to
85 acquire an AML mutex that was previously acquired. FreeBSD report 140979. Lin
88 Implemented additional configuration support for the AML "Debug Object".
89 Output from the debug object can now be enabled via a global variable,
90 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine debugging.
91 This debug output is now available in the release version of ACPICA instead
92 of just the debug version. Also, the entire debug output module can now be
93 configured out of the ACPICA build if desired. One new file added,
94 executer/exdebug.c. Lin Ming, Bob Moore.
96 Added header support for the ACPI MCHI table (Management Controller Host
97 Interface Table). This table was added in ACPI 4.0, but the defining document
98 has only recently become available.
100 Standardized output of integer values for ACPICA warnings/errors. Always use
101 0x prefix for hex output, always use %u for unsigned integer decimal output.
102 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about 400
103 invocations.) These invocations were converted from the original
104 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
106 Example Code and Data Size: These are the sizes for the OS-independent
107 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
108 debug version of the code includes the debug output trace mechanism and has a
109 much larger code and data size.
112 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
113 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
115 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
116 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
118 2) iASL Compiler/Disassembler and Tools:
120 iASL: Implemented typechecking support for static (non-control method)
121 predefined named objects that are declared with the Name() operator. For
122 example, the type of this object is now validated to be of type Integer:
123 Name(_BBN, 1). This change migrates the compiler to using the core predefined
124 name table instead of maintaining a local version. Added a new file,
125 aslpredef.c. ACPICA BZ 832.
127 Disassembler: Added support for the ACPI 4.0 MCHI table.
129 ----------------------------------------
130 21 January 2010. Summary of changes for version 20100121:
132 1) ACPI CA Core Subsystem:
134 Added the 2010 copyright to all module headers and signons. This affects
135 virtually every file in the ACPICA core subsystem, the iASL compiler, the
136 tools/utilities, and the test suites.
138 Implemented a change to the AcpiGetDevices interface to eliminate unnecessary
139 invocations of the _STA method. In the case where a specific _HID is
140 requested, do not run _STA until a _HID match is found. This eliminates
141 potentially dozens of _STA calls during a search for a particular device/HID,
142 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
144 Implemented an additional repair for predefined method return values. Attempt
145 to repair unexpected NULL elements within returned Package objects. Create an
146 Integer of value zero, a NULL String, or a zero-length Buffer as appropriate.
147 ACPICA BZ 818. Lin Ming, Bob Moore.
149 Removed the obsolete ACPI_INTEGER data type. This type was introduced as the
150 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0 (with
151 64-bit AML integers). It is now obsolete and this change removes it from the
152 ACPICA code base, replaced by UINT64. The original typedef has been retained
153 for now for compatibility with existing device driver code. ACPICA BZ 824.
155 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field in
156 the parse tree object.
158 Added additional warning options for the gcc-4 generation. Updated the source
159 accordingly. This includes some code restructuring to eliminate unreachable
160 code, elimination of some gotos, elimination of unused return values, some
161 additional casting, and removal of redundant declarations.
163 Example Code and Data Size: These are the sizes for the OS-independent
164 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
165 debug version of the code includes the debug output trace mechanism and has a
166 much larger code and data size.
169 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
170 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
172 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
173 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
175 2) iASL Compiler/Disassembler and Tools:
177 No functional changes for this release.
179 ----------------------------------------
180 14 December 2009. Summary of changes for version 20091214:
182 1) ACPI CA Core Subsystem:
184 Enhanced automatic data type conversions for predefined name repairs. This
185 change expands the automatic repairs/conversions for predefined name return
186 values to make Integers, Strings, and Buffers fully interchangeable. Also, a
187 Buffer can be converted to a Package of Integers if necessary. The nsrepair.c
188 module was completely restructured. Lin Ming, Bob Moore.
190 Implemented automatic removal of null package elements during predefined name
191 repairs. This change will automatically remove embedded and trailing NULL
192 package elements from returned package objects that are defined to contain a
193 variable number of sub-packages. The driver is then presented with a package
194 with no null elements to deal with. ACPICA BZ 819.
196 Implemented a repair for the predefined _FDE and _GTM names. The expected
197 return value for both names is a Buffer of 5 DWORDs. This repair fixes two
198 possible problems (both seen in the field), where a package of integers is
199 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk Kim.
201 Implemented additional module-level code support. This change will properly
202 execute module-level code that is not at the root of the namespace (under a
203 Device object, etc.). Now executes the code within the current scope instead
204 of the root. ACPICA BZ 762. Lin Ming.
206 Fixed possible mutex acquisition errors when running _REG methods. Fixes a
207 problem where mutex errors can occur when running a _REG method that is in
208 the same scope as a method-defined operation region or an operation region
209 under a module-level IF block. This type of code is rare, so the problem has
210 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
212 Fixed a possible memory leak during module-level code execution. An object
213 could be leaked for each block of executed module-level code if the
214 interpreter slack mode is enabled This change deletes any implicitly returned
215 object from the module-level code block. Lin Ming.
217 Removed messages for successful predefined repair(s). The repair mechanism
218 was considered too wordy. Now, messages are only unconditionally emitted if
219 the return object cannot be repaired. Existing messages for successful
220 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ 827.
222 Example Code and Data Size: These are the sizes for the OS-independent
223 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
224 debug version of the code includes the debug output trace mechanism and has a
225 much larger code and data size.
228 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
229 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
231 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
232 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
234 2) iASL Compiler/Disassembler and Tools:
236 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC files
237 were no longer automatically removed at the termination of the compile.
239 acpiexec: Implemented the -f option to specify default region fill value.
240 This option specifies the value used to initialize buffers that simulate
241 operation regions. Default value is zero. Useful for debugging problems that
242 depend on a specific initial value for a region or field.
244 ----------------------------------------
245 12 November 2009. Summary of changes for version 20091112:
247 1) ACPI CA Core Subsystem:
249 Implemented a post-order callback to AcpiWalkNamespace. The existing
250 interface only has a pre-order callback. This change adds an additional
251 parameter for a post-order callback which will be more useful for bus scans.
252 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
254 Modified the behavior of the operation region memory mapping cache for
255 SystemMemory. Ensure that the memory mappings created for operation regions
256 do not cross 4K page boundaries. Crossing a page boundary while mapping
257 regions can cause kernel warnings on some hosts if the pages have different
258 attributes. Such regions are probably BIOS bugs, and this is the workaround.
259 Linux BZ 14445. Lin Ming.
261 Implemented an automatic repair for predefined methods that must return
262 sorted lists. This change will repair (by sorting) packages returned by _ALR,
263 _PSS, and _TSS. Drivers can now assume that the packages are correctly sorted
264 and do not contain NULL package elements. Adds one new file,
265 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
267 Fixed a possible fault during predefined name validation if a return Package
268 object contains NULL elements. Also adds a warning if a NULL element is
269 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement may
270 include repair or removal of all such NULL elements where possible.
272 Implemented additional module-level executable AML code support. This change
273 will execute module-level code that is not at the root of the namespace
274 (under a Device object, etc.) at table load time. Module-level executable AML
275 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
277 Implemented a new internal function to create Integer objects. This function
278 simplifies miscellaneous object creation code. ACPICA BZ 823.
280 Reduced the severity of predefined repair messages, Warning to Info. Since
281 the object was successfully repaired, a warning is too severe. Reduced to an
282 info message for now. These messages may eventually be changed to debug-only.
285 Example Code and Data Size: These are the sizes for the OS-independent
286 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
287 debug version of the code includes the debug output trace mechanism and has a
288 much larger code and data size.
291 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
292 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
294 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
295 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
297 2) iASL Compiler/Disassembler and Tools:
299 iASL: Implemented Switch() with While(1) so that Break works correctly. This
300 change correctly implements the Switch operator with a surrounding While(1)
301 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
303 iASL: Added a message if a package initializer list is shorter than package
304 length. Adds a new remark for a Package() declaration if an initializer list
305 exists, but is shorter than the declared length of the package. Although
306 technically legal, this is probably a coding error and it is seen in the
307 field. ACPICA BZ 815. Lin Ming, Bob Moore.
309 iASL: Fixed a problem where the compiler could fault after the maximum number
310 of errors was reached (200).
312 acpixtract: Fixed a possible warning for pointer cast if the compiler warning
315 ----------------------------------------
316 13 October 2009. Summary of changes for version 20091013:
318 1) ACPI CA Core Subsystem:
320 Fixed a problem where an Operation Region _REG method could be executed more
321 than once. If a custom address space handler is installed by the host before
322 the "initialize operation regions" phase of the ACPICA initialization, any
323 _REG methods for that address space could be executed twice. This change
324 fixes the problem. ACPICA BZ 427. Lin Ming.
326 Fixed a possible memory leak for the Scope() ASL operator. When the exact
327 invocation of "Scope(\)" is executed (change scope to root), one internal
328 operand object was leaked. Lin Ming.
330 Implemented a run-time repair for the _MAT predefined method. If the _MAT
331 return value is defined as a Field object in the AML, and the field
332 size is less than or equal to the default width of an integer (32 or 64),_MAT
333 can incorrectly return an Integer instead of a Buffer. ACPICA now
334 automatically repairs this problem. ACPICA BZ 810.
336 Implemented a run-time repair for the _BIF and _BIX predefined methods. The
337 "OEM Information" field is often incorrectly returned as an Integer with
338 value zero if the field is not supported by the platform. This is due to an
339 ambiguity in the ACPI specification. The field should always be a string.
340 ACPICA now automatically repairs this problem by returning a NULL string
341 within the returned Package. ACPICA BZ 807.
343 Example Code and Data Size: These are the sizes for the OS-independent
344 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
345 debug version of the code includes the debug output trace mechanism and has a
346 much larger code and data size.
349 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
350 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
352 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
353 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
355 2) iASL Compiler/Disassembler and Tools:
357 Disassembler: Fixed a problem where references to external symbols that
358 contained one or more parent-prefixes (carats) were not handled correctly,
359 possibly causing a fault. ACPICA BZ 806. Lin Ming.
361 Disassembler: Restructured the code so that all functions that handle
362 external symbols are in a single module. One new file is added,
365 AML Debugger: Added a max count argument for the Batch command (which
366 executes multiple predefined methods within the namespace.)
368 iASL: Updated the compiler documentation (User Reference.) Available at
369 http://www.acpica.org/documentation/. ACPICA BZ 750.
371 AcpiXtract: Updated for Lint and other formatting changes. Close all open
374 ----------------------------------------
375 03 September 2009. Summary of changes for version 20090903:
377 1) ACPI CA Core Subsystem:
379 For Windows Vista compatibility, added the automatic execution of an _INI
380 method located at the namespace root (\_INI). This method is executed at
381 table load time. This support is in addition to the automatic execution of
384 Fixed a possible memory leak in the interpreter for AML package objects if
385 the package initializer list is longer than the defined size of the package.
386 This apparently can only happen if the BIOS changes the package size on the
387 fly (seen in a _PSS object), as ASL compilers do not allow this. The
388 interpreter will truncate the package to the defined size (and issue an error
389 message), but previously could leave the extra objects undeleted if they were
390 pre-created during the argument processing (such is the case if the package
391 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
393 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
394 This has been reported in the field. Previously, ACPICA would zero out the
395 buffer/string. Now, the operation is treated as a noop. Provides Windows
396 compatibility. ACPICA BZ 803. Lin Ming.
398 Removed an extraneous error message for ASL constructs of the form
399 Store(LocalX,LocalX) when LocalX is uninitialized. These curious statements
400 are seen in many BIOSs and are once again treated as NOOPs and no error is
401 emitted when they are encountered. ACPICA BZ 785.
403 Fixed an extraneous warning message if a _DSM reserved method returns a
404 Package object. _DSM can return any type of object, so validation on the
405 return type cannot be performed. ACPICA BZ 802.
407 Example Code and Data Size: These are the sizes for the OS-independent
408 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
409 debug version of the code includes the debug output trace mechanism and has a
410 much larger code and data size.
413 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
414 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
416 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
417 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
419 2) iASL Compiler/Disassembler and Tools:
421 iASL: Fixed a problem with the use of the Alias operator and Resource
422 Templates. The correct alias is now constructed and no error is emitted.
425 iASL: Implemented the -I option to specify additional search directories for
426 include files. Allows multiple additional search paths for include files.
427 Directories are searched in the order specified on the command line (after
428 the local directory is searched.) ACPICA BZ 800.
430 iASL: Fixed a problem where the full pathname for include files was not
431 emitted for warnings/errors. This caused the IDE support to not work
432 properly. ACPICA BZ 765.
434 iASL: Implemented the -@ option to specify a Windows-style response file
435 containing additional command line options. ACPICA BZ 801.
437 AcpiExec: Added support to load multiple AML files simultaneously (such as a
438 DSDT and multiple SSDTs). Also added support for wildcards within the AML
439 pathname. These features allow all machine tables to be easily loaded and
440 debugged together. ACPICA BZ 804.
442 Disassembler: Added missing support for disassembly of HEST table Error Bank
445 ----------------------------------------
446 30 July 2009. Summary of changes for version 20090730:
448 The ACPI 4.0 implementation for ACPICA is complete with this release.
450 1) ACPI CA Core Subsystem:
452 ACPI 4.0: Added header file support for all new and changed ACPI tables.
453 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are new
454 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP, BERT,
455 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT. There
456 have been some ACPI 4.0 changes to other existing tables. Split the large
457 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
459 ACPI 4.0: Implemented predefined name validation for all new names. There are
460 31 new names in ACPI 4.0. The predefined validation module was split into two
461 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
463 Implemented support for so-called "module-level executable code". This is
464 executable AML code that exists outside of any control method and is intended
465 to be executed at table load time. Although illegal since ACPI 2.0, this type
466 of code still exists and is apparently still being created. Blocks of this
467 code are now detected and executed as intended. Currently, the code blocks
468 must exist under either an If, Else, or While construct; these are the
469 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
471 Implemented an automatic dynamic repair for predefined names that return
472 nested Package objects. This applies to predefined names that are defined to
473 return a variable-length Package of sub-packages. If the number of sub-
474 packages is one, BIOS code is occasionally seen that creates a simple single
475 package with no sub-packages. This code attempts to fix the problem by
476 wrapping a new package object around the existing package. These methods can
477 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA BZ
480 Fixed a regression introduced in 20090625 for the AcpiGetDevices interface.
481 The _HID/_CID matching was broken and no longer matched IDs correctly. ACPICA
484 Fixed a problem with AcpiReset where the reset would silently fail if the
485 register was one of the protected I/O ports. AcpiReset now bypasses the port
486 validation mechanism. This may eventually be driven into the AcpiRead/Write
489 Fixed a regression related to the recent update of the AcpiRead/Write
490 interfaces. A sleep/suspend could fail if the optional PM2 Control register
491 does not exist during an attempt to write the Bus Master Arbitration bit.
492 (However, some hosts already delete the code that writes this bit, and the
493 code may in fact be obsolete at this date.) ACPICA BZ 799.
495 Fixed a problem where AcpiTerminate could fault if inadvertently called twice
496 in succession. ACPICA BZ 795.
498 Example Code and Data Size: These are the sizes for the OS-independent
499 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
500 debug version of the code includes the debug output trace mechanism and has a
501 much larger code and data size.
504 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
505 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
507 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
508 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
510 2) iASL Compiler/Disassembler and Tools:
512 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
513 changes to existing tables. ACPICA BZ 775.
515 ----------------------------------------
516 25 June 2009. Summary of changes for version 20090625:
518 The ACPI 4.0 Specification was released on June 16 and is available at
519 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
520 continue for the next few releases.
522 1) ACPI CA Core Subsystem:
524 ACPI 4.0: Implemented interpreter support for the IPMI operation region
525 address space. Includes support for bi-directional data buffers and an IPMI
526 address space handler (to be installed by an IPMI device driver.) ACPICA BZ
529 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT. Includes
530 support in both the header files and the disassembler.
532 Completed a major update for the AcpiGetObjectInfo external interface.
534 - Support for variable, unlimited length HID, UID, and CID strings.
535 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA, etc.)
536 - Call the _SxW power methods on behalf of a device object.
537 - Determine if a device is a PCI root bridge.
538 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
539 These changes will require an update to all callers of this interface. See
540 the updated ACPICA Programmer Reference for details. One new source file has
541 been added - utilities/utids.c. ACPICA BZ 368, 780.
543 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
544 transfers. The Value parameter has been extended from 32 bits to 64 bits in
545 order to support new ACPI 4.0 tables. These changes will require an update to
546 all callers of these interfaces. See the ACPICA Programmer Reference for
547 details. ACPICA BZ 768.
549 Fixed several problems with AcpiAttachData. The handler was not invoked when
550 the host node was deleted. The data sub-object was not automatically deleted
551 when the host node was deleted. The interface to the handler had an unused
552 parameter, this was removed. ACPICA BZ 778.
554 Enhanced the function that dumps ACPI table headers. All non-printable
555 characters in the string fields are now replaced with '?' (Signature, OemId,
556 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
557 these fields are occasionally seen in the field. ACPICA BZ 788.
559 Fixed a problem with predefined method repair code where the code that
560 attempts to repair/convert an object of incorrect type is only executed on
561 the first time the predefined method is called. The mechanism that disables
562 warnings on subsequent calls was interfering with the repair mechanism.
565 Fixed a possible memory leak in the predefined validation/repair code when a
566 buffer is automatically converted to an expected string object.
568 Removed obsolete 16-bit files from the distribution and from the current git
569 tree head. ACPICA BZ 776.
571 Example Code and Data Size: These are the sizes for the OS-independent
572 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
573 debug version of the code includes the debug output trace mechanism and has a
574 much larger code and data size.
577 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
578 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
580 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
581 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
583 2) iASL Compiler/Disassembler and Tools:
585 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
586 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
588 ACPI 4.0: iASL - implemented compile-time validation support for all new
589 predefined names and control methods (31 total). ACPICA BZ 769.
591 ----------------------------------------
592 21 May 2009. Summary of changes for version 20090521:
594 1) ACPI CA Core Subsystem:
596 Disabled the preservation of the SCI enable bit in the PM1 control register.
597 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification to be
598 a "preserved" bit - "OSPM always preserves this bit position", section
599 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
600 because the bit needs to be explicitly set by the OS as a workaround. No
601 machines fail if the bit is not preserved. Therefore, ACPICA no longer
602 attempts to preserve this bit.
604 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
605 incorrectly formed _PRT package could cause a fault. Added validation to
606 ensure that each package element is actually a sub-package.
608 Implemented a new interface to install or override a single control method,
609 AcpiInstallMethod. This interface is useful when debugging in order to repair
610 an existing method or to install a missing method without having to override
611 the entire ACPI table. See the ACPICA Programmer Reference for use and
612 examples. Lin Ming, Bob Moore.
614 Fixed several reference count issues with the DdbHandle object that is
615 created from a Load or LoadTable operator. Prevent premature deletion of the
616 object. Also, mark the object as invalid once the table has been unloaded.
617 This is needed because the handle itself may not be deleted after the table
618 unload, depending on whether it has been stored in a named object by the
621 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
622 mutexes of the same sync level are acquired but then not released in strict
623 opposite order, the internally maintained Current Sync Level becomes confused
624 and can cause subsequent execution errors. ACPICA BZ 471.
626 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
627 specification has been changed to make the SyncLevel for mutex objects more
628 useful. When releasing a mutex, the SyncLevel of the mutex must now be the
629 same as the current sync level. This makes more sense than the previous rule
630 (SyncLevel less than or equal). This change updates the code to match the
633 Fixed a problem with the local version of the AcpiOsPurgeCache function. The
634 (local) cache must be locked during all cache object deletions. Andrew
637 Updated the Load operator to use operation region interfaces. This replaces
638 direct memory mapping with region access calls. Now, all region accesses go
639 through the installed region handler as they should.
641 Simplified and optimized the NsGetNextNode function. Reduced parameter count
642 and reduced code for this frequently used function.
644 Example Code and Data Size: These are the sizes for the OS-independent
645 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
646 debug version of the code includes the debug output trace mechanism and has a
647 much larger code and data size.
650 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
651 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
653 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
654 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
656 2) iASL Compiler/Disassembler and Tools:
658 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some problems
659 with sub-table disassembly and handling invalid sub-tables. Attempt recovery
660 after an invalid sub-table ID.
662 ----------------------------------------
663 22 April 2009. Summary of changes for version 20090422:
665 1) ACPI CA Core Subsystem:
667 Fixed a compatibility issue with the recently released I/O port protection
668 mechanism. For windows compatibility, 1) On a port protection violation,
669 simply ignore the request and do not return an exception (allow the control
670 method to continue execution.) 2) If only part of the request overlaps a
671 protected port, read/write the individual ports that are not protected. Linux
674 Enhanced the execution of the ASL/AML BreakPoint operator so that it actually
675 breaks into the AML debugger if the debugger is present. This matches the
676 ACPI-defined behavior.
678 Fixed several possible warnings related to the use of the configurable
679 ACPI_THREAD_ID. This type can now be configured as either an integer or a
680 pointer with no warnings. Also fixes several warnings in printf-like
681 statements for the 64-bit build when the type is configured as a pointer.
684 Fixed a number of possible warnings when compiling with gcc 4+ (depending on
685 warning options.) Examples include printf formats, aliasing, unused globals,
686 missing prototypes, missing switch default statements, use of non-ANSI
687 library functions, use of non-ANSI constructs. See generate/unix/Makefile for
688 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
690 Example Code and Data Size: These are the sizes for the OS-independent
691 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
692 debug version of the code includes the debug output trace mechanism and has a
693 much larger code and data size.
696 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
697 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
699 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
700 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
702 2) iASL Compiler/Disassembler and Tools:
704 iASL: Fixed a generation warning from Bison 2.3 and fixed several warnings on
707 iASL: Fixed a problem where the Unix/Linux versions of the compiler could not
708 correctly digest Windows/DOS formatted files (with CR/LF).
710 iASL: Added a new option for "quiet mode" (-va) that produces only the
711 compilation summary, not individual errors and warnings. Useful for large
714 AcpiExec: Implemented a new option (-z) to enable a forced semaphore/mutex
715 timeout that can be used to detect hang conditions during execution of AML
716 code (includes both internal semaphores and AML-defined mutexes and events.)
718 Added new makefiles for the generation of acpica in a generic unix-like
719 environment. These makefiles are intended to generate the acpica tools and
720 utilities from the original acpica git source tree structure.
722 Test Suites: Updated and cleaned up the documentation files. Updated the
723 copyrights to 2009, affecting all source files. Use the new version of iASL
724 with quiet mode. Increased the number of available semaphores in the Windows
725 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL, added
726 an alternate implementation of the semaphore timeout to allow aslts to
727 execute fully on Cygwin.
729 ----------------------------------------
730 20 March 2009. Summary of changes for version 20090320:
732 1) ACPI CA Core Subsystem:
734 Fixed a possible race condition between AcpiWalkNamespace and dynamic table
735 unloads. Added a reader/writer locking mechanism to allow multiple concurrent
736 namespace walks (readers), but block a dynamic table unload until it can gain
737 exclusive write access to the namespace. This fixes a problem where a table
738 unload could (possibly catastrophically) delete the portion of the namespace
739 that is currently being examined by a walk. Adds a new file, utlock.c, that
740 implements the reader/writer lock mechanism. ACPICA BZ 749.
742 Fixed a regression introduced in version 20090220 where a change to the FADT
743 handling could cause the ACPICA subsystem to access non-existent I/O ports.
745 Modified the handling of FADT register and table (FACS/DSDT) addresses. The
746 FADT can contain both 32-bit and 64-bit versions of these addresses.
747 Previously, the 64-bit versions were favored, meaning that if both 32 and 64
748 versions were valid, but not equal, the 64-bit version was used. This was
749 found to cause some machines to fail. Now, in this case, the 32-bit version
750 is used instead. This now matches the Windows behavior.
752 Implemented a new mechanism to protect certain I/O ports. Provides Microsoft
753 compatibility and protects the standard PC I/O ports from access via AML
754 code. Adds a new file, hwvalid.c
756 Fixed a possible extraneous warning message from the FADT support. The
757 message warns of a 32/64 length mismatch between the legacy and GAS
758 definitions for a register.
760 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface is
761 made obsolete by the port protection mechanism above. It was previously used
762 to validate the entire address range of an operation region, which could be
763 incorrect if the range included illegal ports, but fields within the
764 operation region did not actually access those ports. Validation is now
765 performed on a per-field basis instead of the entire region.
767 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
768 Ignored bits must be "preserved" according to the ACPI spec. Usually, this
769 means a read/modify/write when writing to the register. However, for status
770 registers, writing a one means clear the event. Writing a zero means preserve
771 the event (do not clear.) This behavior is clarified in the ACPI 4.0 spec,
772 and the ACPICA code now simply always writes a zero to the ignored bit.
774 Modified the handling of ignored bits for the PM1 A/B Control Registers. As
775 per the ACPI specification, for the control registers, preserve
776 (read/modify/write) all bits that are defined as either reserved or ignored.
778 Updated the handling of write-only bits in the PM1 A/B Control Registers.
779 When reading the register, zero the write-only bits as per the ACPI spec.
780 ACPICA BZ 443. Lin Ming.
782 Removed "Linux" from the list of supported _OSI strings. Linux no longer
783 wants to reply true to this request. The Windows strings are the only paths
784 through the AML that are tested and known to work properly.
787 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
788 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
790 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
791 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
793 2) iASL Compiler/Disassembler and Tools:
795 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c and
798 ----------------------------------------
799 20 February 2009. Summary of changes for version 20090220:
801 1) ACPI CA Core Subsystem:
803 Optimized the ACPI register locking. Removed locking for reads from the ACPI
804 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is
805 not required when reading the single-bit registers. The
806 AcpiGetRegisterUnlocked function is no longer needed and has been removed.
807 This will improve performance for reads on these registers. ACPICA BZ 760.
809 Fixed the parameter validation for AcpiRead/Write. Now return
810 AE_BAD_PARAMETER if the input register pointer is null, and AE_BAD_ADDRESS if
811 the register has an address of zero. Previously, these cases simply returned
812 AE_OK. For optional registers such as PM1B status/enable/control, the caller
813 should check for a valid register address before calling. ACPICA BZ 748.
815 Renamed the external ACPI bit register access functions. Renamed
816 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
817 functions. The new names are AcpiReadBitRegister and AcpiWriteBitRegister.
818 Also, restructured the code for these functions by simplifying the code path
819 and condensing duplicate code to reduce code size.
821 Added new functions to transparently handle the possibly split PM1 A/B
822 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two functions
823 now handle the split registers for PM1 Status, Enable, and Control. ACPICA BZ
826 Added a function to handle the PM1 control registers, AcpiHwWritePm1Control.
827 This function writes both of the PM1 control registers (A/B). These registers
828 are different than the PM1 A/B status and enable registers in that different
829 values can be written to the A/B registers. Most notably, the SLP_TYP bits
830 can be different, as per the values returned from the _Sx predefined methods.
832 Removed an extra register write within AcpiHwClearAcpiStatus. This function
833 was writing an optional PM1B status register twice. The existing call to the
834 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1 A/B
835 register. ACPICA BZ 751.
837 Split out the PM1 Status registers from the FADT. Added new globals for these
838 registers (A/B), similar to the way the PM1 Enable registers are handled.
839 Instead of overloading the FADT Event Register blocks. This makes the code
840 clearer and less prone to error.
842 Fixed the warning message for when the platform contains too many ACPI tables
843 for the default size of the global root table data structure. The calculation
844 for the truncation value was incorrect.
846 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
847 obsolete macro, since it is now a simple reference to ->common.type. There
848 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
850 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
851 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
852 simply SLEEP_TYPE. ACPICA BZ 754.
854 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
855 function is only needed on 64-bit host operating systems and is thus not
856 included for 32-bit hosts.
858 Debug output: print the input and result for invocations of the _OSI reserved
859 control method via the ACPI_LV_INFO debug level. Also, reduced some of the
860 verbosity of this debug level. Len Brown.
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: 82.3K Code, 17.5K Data, 99.8K Total
869 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
871 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
872 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
874 2) iASL Compiler/Disassembler and Tools:
876 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
877 various legal performance profiles.
879 ----------------------------------------
880 23 January 2009. Summary of changes for version 20090123:
882 1) ACPI CA Core Subsystem:
884 Added the 2009 copyright to all module headers and signons. This affects
885 virtually every file in the ACPICA core subsystem, the iASL compiler, and
888 Implemented a change to allow the host to override any ACPI table, including
889 dynamically loaded tables. Previously, only the DSDT could be replaced by the
890 host. With this change, the AcpiOsTableOverride interface is called for each
891 table found in the RSDT/XSDT during ACPICA initialization, and also whenever
892 a table is dynamically loaded via the AML Load operator.
894 Updated FADT flag definitions, especially the Boot Architecture flags.
896 Debugger: For the Find command, automatically pad the input ACPI name with
897 underscores if the name is shorter than 4 characters. This enables a match
898 with the actual namespace entry which is itself padded with underscores.
900 Example Code and Data Size: These are the sizes for the OS-independent
901 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
902 debug version of the code includes the debug output trace mechanism and has a
903 much larger code and data size.
906 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
907 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
909 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
910 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
912 2) iASL Compiler/Disassembler and Tools:
914 Fix build error under Bison-2.4.
916 Dissasembler: Enhanced FADT support. Added decoding of the Boot Architecture
917 flags. Now decode all flags, regardless of the FADT version. Flag output
918 includes the FADT version which first defined each flag.
920 The iASL -g option now dumps the RSDT to a file (in addition to the FADT and
923 ----------------------------------------
924 04 December 2008. Summary of changes for version 20081204:
926 1) ACPI CA Core Subsystem:
928 The ACPICA Programmer Reference has been completely updated and revamped for
929 this release. This includes updates to the external interfaces, OSL
930 interfaces, the overview sections, and the debugger reference.
932 Several new ACPICA interfaces have been implemented and documented in the
933 programmer reference:
934 AcpiReset - Writes the reset value to the FADT-defined reset register.
935 AcpiDisableAllGpes - Disable all available GPEs.
936 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
937 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
938 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
939 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
940 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
942 Most of the public ACPI hardware-related interfaces have been moved to a new
943 file, components/hardware/hwxface.c
945 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
946 register lengths within the FADT are now used, and the low level ACPI
947 register access no longer hardcodes the ACPI register lengths. Given that
948 there may be some risk in actually trusting the FADT register lengths, a run-
949 time option was added to fall back to the default hardcoded lengths if the
950 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
951 option is set to true for now, and a warning is issued if a suspicious FADT
952 register length is overridden with the default value.
954 Fixed a reference count issue in NsRepairObject. This problem was introduced
955 in version 20081031 as part of a fix to repair Buffer objects within
958 Added semaphore support to the Linux/Unix application OS-services layer
959 (OSL). ACPICA BZ 448. Lin Ming.
961 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes will
962 be implemented in the OSL, or will binary semaphores be used instead.
964 Example Code and Data Size: These are the sizes for the OS-independent
965 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
966 debug version of the code includes the debug output trace mechanism and has a
967 much larger code and data size.
970 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
971 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
973 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
974 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
976 2) iASL Compiler/Disassembler and Tools:
978 iASL: Completed the '-e' option to include additional ACPI tables in order to
979 aid with disassembly and External statement generation. ACPICA BZ 742. Lin
982 iASL: Removed the "named object in while loop" error. The compiler cannot
983 determine how many times a loop will execute. ACPICA BZ 730.
985 Disassembler: Implemented support for FADT revision 2 (MS extension). ACPICA
988 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and MCFG).
990 ----------------------------------------
991 31 October 2008. Summary of changes for version 20081031:
993 1) ACPI CA Core Subsystem:
995 Restructured the ACPICA header files into public/private. acpi.h now includes
996 only the "public" acpica headers. All other acpica headers are "private" and
997 should not be included by acpica users. One new file, accommon.h is used to
998 include the commonly used private headers for acpica code generation. Future
999 plans include moving all private headers to a new subdirectory.
1001 Implemented an automatic Buffer->String return value conversion for
1002 predefined ACPI methods. For these methods (such as _BIF), added automatic
1003 conversion for return objects that are required to be a String, but a Buffer
1004 was found instead. This can happen when reading string battery data from an
1005 operation region, because it used to be difficult to convert the data from
1006 buffer to string from within the ASL. Ensures that the host OS is provided
1007 with a valid null-terminated string. Linux BZ 11822.
1009 Updated the FACS waking vector interfaces. Split AcpiSetFirmwareWakingVector
1010 into two: one for the 32-bit vector, another for the 64-bit vector. This is
1011 required because the host OS must setup the wake much differently for each
1012 vector (real vs. protected mode, etc.) and the interface itself should not be
1013 deciding which vector to use. Also, eliminated the GetFirmwareWakingVector
1014 interface, as it served no purpose (only the firmware reads the vector, OS
1015 only writes the vector.) ACPICA BZ 731.
1017 Implemented a mechanism to escape infinite AML While() loops. Added a loop
1018 counter to force exit from AML While loops if the count becomes too large.
1019 This can occur in poorly written AML when the hardware does not respond
1020 within a while loop and the loop does not implement a timeout. The maximum
1021 loop count is configurable. A new exception code is returned when a loop is
1022 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
1024 Optimized the execution of AML While loops. Previously, a control state
1025 object was allocated and freed for each execution of the loop. The
1026 optimization is to simply reuse the control state for each iteration. This
1027 speeds up the raw loop execution time by about 5%.
1029 Enhanced the implicit return mechanism. For Windows compatibility, return an
1030 implicit integer of value zero for methods that contain no executable code.
1031 Such methods are seen in the field as stubs (presumably), and can cause
1032 drivers to fail if they expect a return value. Lin Ming.
1034 Allow multiple backslashes as root prefixes in namepaths. In a fully
1035 qualified namepath, allow multiple backslash prefixes. This can happen (and
1036 is seen in the field) because of the use of a double-backslash in strings
1037 (since backslash is the escape character) causing confusion. ACPICA BZ 739
1040 Emit a warning if two different FACS or DSDT tables are discovered in the
1041 FADT. Checks if there are two valid but different addresses for the FACS and
1042 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
1044 Consolidated the method argument count validation code. Merged the code that
1045 validates control method argument counts into the predefined validation
1046 module. Eliminates possible multiple warnings for incorrect argument counts.
1048 Implemented ACPICA example code. Includes code for ACPICA initialization,
1049 handler installation, and calling a control method. Available at
1050 source/tools/examples.
1052 Added a global pointer for FACS table to simplify internal FACS access. Use
1053 the global pointer instead of using AcpiGetTableByIndex for each FACS access.
1054 This simplifies the code for the Global Lock and the Firmware Waking
1057 Example Code and Data Size: These are the sizes for the OS-independent
1058 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1059 debug version of the code includes the debug output trace mechanism and has a
1060 much larger code and data size.
1063 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
1064 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
1066 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
1067 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
1069 2) iASL Compiler/Disassembler and Tools:
1071 iASL: Improved disassembly of external method calls. Added the -e option to
1072 allow the inclusion of additional ACPI tables to help with the disassembly of
1073 method invocations and the generation of external declarations during the
1074 disassembly. Certain external method invocations cannot be disassembled
1075 properly without the actual declaration of the method. Use the -e option to
1076 include the table where the external method(s) are actually declared. Most
1077 useful for disassembling SSDTs that make method calls back to the master
1078 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl -d
1079 -e dsdt.aml ssdt1.aml
1081 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
1082 problem where the use of an alias within a namepath would result in a not
1083 found error or cause the compiler to fault. Also now allows forward
1084 references from the Alias operator itself. ACPICA BZ 738.
1086 ----------------------------------------
1087 26 September 2008. Summary of changes for version 20080926:
1089 1) ACPI CA Core Subsystem:
1091 Designed and implemented a mechanism to validate predefined ACPI methods and
1092 objects. This code validates the predefined ACPI objects (objects whose names
1093 start with underscore) that appear in the namespace, at the time they are
1094 evaluated. The argument count and the type of the returned object are
1095 validated against the ACPI specification. The purpose of this validation is
1096 to detect problems with the BIOS-implemented predefined ACPI objects before
1097 the results are returned to the ACPI-related drivers. Future enhancements may
1098 include actual repair of incorrect return objects where possible. Two new
1099 files are nspredef.c and acpredef.h.
1101 Fixed a fault in the AML parser if a memory allocation fails during the Op
1102 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
1104 Fixed an issue with implicit return compatibility. This change improves the
1105 implicit return mechanism to be more compatible with the MS interpreter. Lin
1106 Ming, ACPICA BZ 349.
1108 Implemented support for zero-length buffer-to-string conversions. Allow zero
1109 length strings during interpreter buffer-to-string conversions. For example,
1110 during the ToDecimalString and ToHexString operators, as well as implicit
1111 conversions. Fiodor Suietov, ACPICA BZ 585.
1113 Fixed two possible memory leaks in the error exit paths of
1114 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions are
1115 similar in that they use a stack of state objects in order to eliminate
1116 recursion. The stack must be fully unwound and deallocated if an error
1117 occurs. Lin Ming. ACPICA BZ 383.
1119 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the global
1120 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
1121 Moore ACPICA BZ 442.
1123 Removed the obsolete version number in module headers. Removed the
1124 "$Revision" number that appeared in each module header. This version number
1125 was useful under SourceSafe and CVS, but has no meaning under git. It is not
1126 only incorrect, it could also be misleading.
1128 Example Code and Data Size: These are the sizes for the OS-independent
1129 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1130 debug version of the code includes the debug output trace mechanism and has a
1131 much larger code and data size.
1134 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1135 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
1137 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
1138 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
1140 ----------------------------------------
1141 29 August 2008. Summary of changes for version 20080829:
1143 1) ACPI CA Core Subsystem:
1145 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
1146 Reference. Changes include the elimination of cheating on the Object field
1147 for the DdbHandle subtype, addition of a reference class field to
1148 differentiate the various reference types (instead of an AML opcode), and the
1149 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
1151 Reduce an error to a warning for an incorrect method argument count.
1152 Previously aborted with an error if too few arguments were passed to a
1153 control method via the external ACPICA interface. Now issue a warning instead
1154 and continue. Handles the case where the method inadvertently declares too
1155 many arguments, but does not actually use the extra ones. Applies mainly to
1156 the predefined methods. Lin Ming. Linux BZ 11032.
1158 Disallow the evaluation of named object types with no intrinsic value. Return
1159 AE_TYPE for objects that have no value and therefore evaluation is undefined:
1160 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation of
1161 these types were allowed, but an exception would be generated at some point
1162 during the evaluation. Now, the error is generated up front.
1164 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
1165 (nsnames.c). Fixes a leak in the error exit path.
1167 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These debug
1168 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and ACPI_EXCEPTION
1169 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
1172 Removed obsolete and/or unused exception codes from the acexcep.h header.
1173 There is the possibility that certain device drivers may be affected if they
1174 use any of these exceptions.
1176 The ACPICA documentation has been added to the public git source tree, under
1177 acpica/documents. Included are the ACPICA programmer reference, the iASL
1178 compiler reference, and the changes.txt release logfile.
1180 Example Code and Data Size: These are the sizes for the OS-independent
1181 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1182 debug version of the code includes the debug output trace mechanism and has a
1183 much larger code and data size.
1186 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1187 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
1189 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1190 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
1192 2) iASL Compiler/Disassembler and Tools:
1194 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
1195 defines _SCP with 3 arguments. Previous versions defined it with only 1
1196 argument. iASL now allows both definitions.
1198 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for zero-
1199 length subtables when disassembling ACPI tables. Also fixed a couple of
1200 errors where a full 16-bit table type field was not extracted from the input
1203 acpisrc: Improve comment counting mechanism for generating source code
1204 statistics. Count first and last lines of multi-line comments as whitespace,
1205 not comment lines. Handle Linux legal header in addition to standard acpica
1208 ----------------------------------------
1210 29 July 2008. Summary of changes for version 20080729:
1212 1) ACPI CA Core Subsystem:
1214 Fix a possible deadlock in the GPE dispatch. Remove call to
1215 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will attempt
1216 to acquire the GPE lock but can deadlock since the GPE lock is already held
1217 at dispatch time. This code was introduced in version 20060831 as a response
1218 to Linux BZ 6881 and has since been removed from Linux.
1220 Add a function to dereference returned reference objects. Examines the return
1221 object from a call to AcpiEvaluateObject. Any Index or RefOf references are
1222 automatically dereferenced in an attempt to return something useful (these
1223 reference types cannot be converted into an external ACPI_OBJECT.) Provides
1224 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
1226 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
1227 subtables for the MADT and one new subtable for the SRAT. Includes
1228 disassembler and AcpiSrc support. Data from the Intel 64 Architecture x2APIC
1229 Specification, June 2008.
1231 Additional error checking for pathname utilities. Add error check after all
1232 calls to AcpiNsGetPathnameLength. Add status return from
1233 AcpiNsBuildExternalPath and check after all calls. Add parameter validation
1234 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
1236 Return status from the global init function AcpiUtGlobalInitialize. This is
1237 used by both the kernel subsystem and the utilities such as iASL compiler.
1238 The function could possibly fail when the caches are initialized. Yang Yi.
1240 Add a function to decode reference object types to strings. Created for
1241 improved error messages.
1243 Improve object conversion error messages. Better error messages during object
1244 conversion from internal to the external ACPI_OBJECT. Used for external calls
1245 to AcpiEvaluateObject.
1247 Example Code and Data Size: These are the sizes for the OS-independent
1248 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1249 debug version of the code includes the debug output trace mechanism and has a
1250 much larger code and data size.
1253 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
1254 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
1256 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
1257 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
1259 2) iASL Compiler/Disassembler and Tools:
1261 Debugger: fix a possible hang when evaluating non-methods. Fixes a problem
1262 introduced in version 20080701. If the object being evaluated (via execute
1263 command) is not a method, the debugger can hang while trying to obtain non-
1264 existent parameters.
1266 iASL: relax error for using reserved "_T_x" identifiers. These names can
1267 appear in a disassembled ASL file if they were emitted by the original
1268 compiler. Instead of issuing an error or warning and forcing the user to
1269 manually change these names, issue a remark instead.
1271 iASL: error if named object created in while loop. Emit an error if any named
1272 object is created within a While loop. If allowed, this code will generate a
1273 run-time error on the second iteration of the loop when an attempt is made to
1274 create the same named object twice. ACPICA bugzilla 730.
1276 iASL: Support absolute pathnames for include files. Add support for absolute
1277 pathnames within the Include operator. previously, only relative pathnames
1280 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource Descriptor.
1281 The ACPI spec requires one interrupt minimum. BZ 423
1283 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
1284 Handles the case for the Interrupt Resource Descriptor where
1285 the ResourceSource argument is omitted but ResourceSourceIndex
1286 is present. Now leave room for the Index. BZ 426
1288 iASL: Prevent error message if CondRefOf target does not exist. Fixes cases
1289 where an error message is emitted if the target does not exist. BZ 516
1291 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
1292 (get ACPI tables on Windows). This was apparently broken in version 20070919.
1294 AcpiXtract: Handle EOF while extracting data. Correctly handle the case where
1295 the EOF happens immediately after the last table in the input file. Print
1296 completion message. Previously, no message was displayed in this case.
1298 ----------------------------------------
1299 01 July 2008. Summary of changes for version 20080701:
1301 0) Git source tree / acpica.org
1303 Fixed a problem where a git-clone from http would not transfer the entire
1306 1) ACPI CA Core Subsystem:
1308 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
1309 enable bit. Now performs a read-change-write of the enable register instead
1310 of simply writing out the cached enable mask. This will prevent inadvertent
1311 enabling of GPEs if a rogue GPE is received during initialization (before GPE
1312 handlers are installed.)
1314 Implemented a copy for dynamically loaded tables. Previously, dynamically
1315 loaded tables were simply mapped - but on some machines this memory is
1316 corrupted after suspend. Now copy the table to a local buffer. For the
1317 OpRegion case, added checksum verify. Use the table length from the table
1318 header, not the region length. For the Buffer case, use the table length
1319 also. Dennis Noordsij, Bob Moore. BZ 10734
1321 Fixed a problem where the same ACPI table could not be dynamically loaded and
1322 unloaded more than once. Without this change, a table cannot be loaded again
1323 once it has been loaded/unloaded one time. The current mechanism does not
1324 unregister a table upon an unload. During a load, if the same table is found,
1325 this no longer returns an exception. BZ 722
1327 Fixed a problem where the wrong descriptor length was calculated for the
1328 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as EndTag
1329 are calculated as 12 bytes long, but the actual length in the internal
1330 descriptor is 16 because of the round-up to 8 on the 64-bit build. Reported
1331 by Linn Crosetto. BZ 728
1333 Fixed a possible memory leak in the Unload operator. The DdbHandle returned
1334 by Load() did not have its reference count decremented during unload, leading
1335 to a memory leak. Lin Ming. BZ 727
1337 Fixed a possible memory leak when deleting thermal/processor objects. Any
1338 associated notify handlers (and objects) were not being deleted. Fiodor
1341 Fixed the ordering of the ASCII names in the global mutex table to match the
1342 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug only.
1343 Vegard Nossum. BZ 726
1345 Enhanced the AcpiGetObjectInfo interface to return the number of required
1346 arguments if the object is a control method. Added this call to the debugger
1347 so the proper number of default arguments are passed to a method. This
1348 prevents a warning when executing methods from AcpiExec.
1350 Added a check for an invalid handle in AcpiGetObjectInfo. Return
1351 AE_BAD_PARAMETER if input handle is invalid. BZ 474
1353 Fixed an extraneous warning from exconfig.c on the 64-bit build.
1355 Example Code and Data Size: These are the sizes for the OS-independent
1356 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1357 debug version of the code includes the debug output trace mechanism and has a
1358 much larger code and data size.
1361 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1362 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1364 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
1365 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
1367 2) iASL Compiler/Disassembler and Tools:
1369 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
1370 resource descriptor names.
1372 iASL: Detect invalid ASCII characters in input (windows version). Removed the
1373 "-CF" flag from the flex compile, enables correct detection of non-ASCII
1374 characters in the input. BZ 441
1376 iASL: Eliminate warning when result of LoadTable is not used. Eliminate the
1377 "result of operation not used" warning when the DDB handle returned from
1378 LoadTable is not used. The warning is not needed. BZ 590
1380 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG method to
1381 pass address of table to the AML. Added option to disable OpRegion simulation
1382 to allow creation of an OpRegion with a real address that was passed to _CFG.
1383 All of this allows testing of the Load and Unload operators from AcpiExec.
1385 Debugger: update tables command for unloaded tables. Handle unloaded tables
1386 and use the standard table header output routine.
1388 ----------------------------------------
1389 09 June 2008. Summary of changes for version 20080609:
1391 1) ACPI CA Core Subsystem:
1393 Implemented a workaround for reversed _PRT entries. A significant number of
1394 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
1395 change dynamically detects and repairs this problem. Provides compatibility
1396 with MS ACPI. BZ 6859
1398 Simplified the internal ACPI hardware interfaces to eliminate the locking
1399 flag parameter from Register Read/Write. Added a new external interface,
1400 AcpiGetRegisterUnlocked.
1402 Fixed a problem where the invocation of a GPE control method could hang. This
1403 was a regression introduced in 20080514. The new method argument count
1404 validation mechanism can enter an infinite loop when a GPE method is
1405 dispatched. Problem fixed by removing the obsolete code that passed GPE block
1406 information to the notify handler via the control method parameter pointer.
1408 Fixed a problem where the _SST execution status was incorrectly returned to
1409 the caller of AcpiEnterSleepStatePrep. This was a regression introduced in
1410 20080514. _SST is optional and a NOT_FOUND exception should never be
1413 Fixed a problem where a deleted object could be accessed from within the AML
1414 parser. This was a regression introduced in version 20080123 as a fix for the
1415 Unload operator. Lin Ming. BZ 10669
1417 Cleaned up the debug operand dump mechanism. Eliminated unnecessary operands
1418 and eliminated the use of a negative index in a loop. Operands are now
1419 displayed in the correct order, not backwards. This also fixes a regression
1420 introduced in 20080514 on 64-bit systems where the elimination of
1421 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ 715
1423 Fixed a possible memory leak in EvPciConfigRegionSetup where the error exit
1424 path did not delete a locally allocated structure.
1426 Updated definitions for the DMAR and SRAT tables to synchronize with the
1427 current specifications. Includes disassembler support.
1429 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
1430 loop termination value was used. Loop terminated on iteration early, missing
1431 one mutex. Linn Crosetto
1433 Example Code and Data Size: These are the sizes for the OS-independent
1434 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1435 debug version of the code includes the debug output trace mechanism and has a
1436 much larger code and data size.
1439 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1440 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1442 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
1443 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
1445 2) iASL Compiler/Disassembler and Tools:
1447 Disassembler: Implemented support for EisaId() within _CID objects. Now
1448 disassemble integer _CID objects back to EisaId invocations, including
1449 multiple integers within _CID packages. Includes single-step support for
1452 Disassembler: Added support for DMAR and SRAT table definition changes.
1454 ----------------------------------------
1455 14 May 2008. Summary of changes for version 20080514:
1457 1) ACPI CA Core Subsystem:
1459 Fixed a problem where GPEs were enabled too early during the ACPICA
1460 initialization. This could lead to "handler not installed" errors on some
1461 machines. Moved GPE enable until after _REG/_STA/_INI methods are run. This
1462 ensures that all operation regions and devices throughout the namespace have
1463 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
1465 Implemented a change to the enter sleep code. Moved execution of the _GTS
1466 method to just before setting sleep enable bit. The execution was moved from
1467 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
1468 immediately before the SLP_EN bit is set, as per the ACPI specification.
1471 Implemented a fix to disable unknown GPEs (2nd version). Now always disable
1472 the GPE, even if ACPICA thinks that that it is already disabled. It is
1473 possible that the AML or some other code has enabled the GPE unbeknownst to
1476 Fixed a problem with the Field operator where zero-length fields would return
1477 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length ASL
1478 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
1480 Implemented a fix for the Load operator, now load the table at the namespace
1481 root. This reverts a change introduced in version 20071019. The table is now
1482 loaded at the namespace root even though this goes against the ACPI
1483 specification. This provides compatibility with other ACPI implementations.
1484 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin Ming.
1486 Fixed a problem where ACPICA would not Load() tables with unusual signatures.
1487 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
1488 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
1489 Therefore, signature validation is worthless. Apparently MS ACPI accepts such
1490 signatures, ACPICA must be compatible. BZ 10454.
1492 Fixed a possible negative array index in AcpiUtValidateException. Added NULL
1493 fields to the exception string arrays to eliminate a -1 subtraction on the
1496 Updated the debug tracking macros to reduce overall code and data size.
1497 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
1498 instead of pointers to static strings. Jan Beulich and Bob Moore.
1500 Implemented argument count checking in control method invocation via
1501 AcpiEvaluateObject. Now emit an error if too few arguments, warning if too
1502 many. This applies only to extern programmatic control method execution, not
1503 method-to-method calls within the AML. Lin Ming.
1505 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is no
1506 longer needed, especially with the removal of 16-bit support. It was replaced
1507 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64 bit on
1508 32/64-bit platforms is required.
1510 Added the C const qualifier for appropriate string constants -- mostly
1511 MODULE_NAME and printf format strings. Jan Beulich.
1513 Example Code and Data Size: These are the sizes for the OS-independent
1514 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1515 debug version of the code includes the debug output trace mechanism and has a
1516 much larger code and data size.
1519 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1520 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1522 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
1523 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
1525 2) iASL Compiler/Disassembler and Tools:
1527 Implemented ACPI table revision ID validation in the disassembler. Zero is
1528 always invalid. For DSDTs, the ID controls the interpreter integer width. 1
1529 means 32-bit and this is unusual. 2 or greater is 64-bit.
1531 ----------------------------------------
1532 21 March 2008. Summary of changes for version 20080321:
1534 1) ACPI CA Core Subsystem:
1536 Implemented an additional change to the GPE support in order to suppress
1537 spurious or stray GPEs. The AcpiEvDisableGpe function will now permanently
1538 disable incoming GPEs that are neither enabled nor disabled -- meaning that
1539 the GPE is unknown to the system. This should prevent future interrupt floods
1540 from that GPE. BZ 6217 (Zhang Rui)
1542 Fixed a problem where NULL package elements were not returned to the
1543 AcpiEvaluateObject interface correctly. The element was simply ignored
1544 instead of returning a NULL ACPI_OBJECT package element, potentially causing
1545 a buffer overflow and/or confusing the caller who expected a fixed number of
1546 elements. BZ 10132 (Lin Ming, Bob Moore)
1548 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word, Dword,
1549 Qword), Field, BankField, and IndexField operators when invoked from inside
1550 an executing control method. In this case, these operators created namespace
1551 nodes that were incorrectly left marked as permanent nodes instead of
1552 temporary nodes. This could cause a problem if there is race condition
1553 between an exiting control method and a running namespace walk. (Reported by
1556 Fixed a problem where the CreateField and CreateXXXField operators would
1557 incorrectly allow duplicate names (the name of the field) with no exception
1560 Implemented several changes for Notify handling. Added support for new Notify
1561 values (ACPI 2.0+) and improved the Notify debug output. Notify on
1562 PowerResource objects is no longer allowed, as per the ACPI specification.
1563 (Bob Moore, Zhang Rui)
1565 All Reference Objects returned via the AcpiEvaluateObject interface are now
1566 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved for
1567 NULL objects - either NULL package elements or unresolved named references.
1569 Fixed a problem where an extraneous debug message was produced for package
1570 objects (when debugging enabled). The message "Package List length larger
1571 than NumElements count" is now produced in the correct case, and is now an
1572 error message rather than a debug message. Added a debug message for the
1573 opposite case, where NumElements is larger than the Package List (the package
1574 will be padded out with NULL elements as per the ACPI spec.)
1576 Implemented several improvements for the output of the ASL "Debug" object to
1577 clarify and keep all data for a given object on one output line.
1579 Fixed two size calculation issues with the variable-length Start Dependent
1580 resource descriptor.
1582 Example Code and Data Size: These are the sizes for the OS-independent
1583 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1584 debug version of the code includes the debug output trace mechanism and has
1585 a much larger code and data size.
1588 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1589 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1591 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1592 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1594 2) iASL Compiler/Disassembler and Tools:
1596 Fixed a problem with the use of the Switch operator where execution of the
1597 containing method by multiple concurrent threads could cause an
1598 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
1599 actual Switch opcode, it must be simulated with local named temporary
1600 variables and if/else pairs. The solution chosen was to mark any method that
1601 uses Switch as Serialized, thus preventing multiple thread entries. BZ 469.
1603 ----------------------------------------
1604 13 February 2008. Summary of changes for version 20080213:
1606 1) ACPI CA Core Subsystem:
1608 Implemented another MS compatibility design change for GPE/Notify handling.
1609 GPEs are now cleared/enabled asynchronously to allow all pending notifies to
1610 complete first. It is expected that the OSL will queue the enable request
1611 behind all pending notify requests (may require changes to the local host OSL
1612 in AcpiOsExecute). Alexey Starikovskiy.
1614 Fixed a problem where buffer and package objects passed as arguments to a
1615 control method via the external AcpiEvaluateObject interface could cause an
1616 AE_AML_INTERNAL exception depending on the order and type of operators
1617 executed by the target control method.
1619 Fixed a problem where resource descriptor size optimization could cause a
1620 problem when a _CRS resource template is passed to a _SRS method. The _SRS
1621 resource template must use the same descriptors (with the same size) as
1622 returned from _CRS. This change affects the following resource descriptors:
1623 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ 9487)
1625 Fixed a problem where a CopyObject to RegionField, BankField, and IndexField
1626 objects did not perform an implicit conversion as it should. These types must
1627 retain their initial type permanently as per the ACPI specification. However,
1628 a CopyObject to all other object types should not perform an implicit
1629 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
1631 Fixed a problem with the AcpiGetDevices interface where the mechanism to
1632 match device CIDs did not examine the entire list of available CIDs, but
1633 instead aborted on the first non-matching CID. Andrew Patterson.
1635 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro was
1636 inadvertently changed to return a 16-bit value instead of a 32-bit value,
1637 truncating the upper dword of a 64-bit value. This macro is only used to
1638 display debug output, so no incorrect calculations were made. Also,
1639 reimplemented the macro so that a 64-bit shift is not performed by
1640 inefficient compilers.
1642 Added missing va_end statements that should correspond with each va_start
1645 Example Code and Data Size: These are the sizes for the OS-independent
1646 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1647 debug version of the code includes the debug output trace mechanism and has
1648 a much larger code and data size.
1651 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1652 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1654 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1655 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1657 2) iASL Compiler/Disassembler and Tools:
1659 Implemented full disassembler support for the following new ACPI tables:
1660 BERT, EINJ, and ERST. Implemented partial disassembler support for the
1661 complicated HEST table. These tables support the Windows Hardware Error
1662 Architecture (WHEA).
1664 ----------------------------------------
1665 23 January 2008. Summary of changes for version 20080123:
1667 1) ACPI CA Core Subsystem:
1669 Added the 2008 copyright to all module headers and signons. This affects
1670 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1671 the tools/utilities.
1673 Fixed a problem with the SizeOf operator when used with Package and Buffer
1674 objects. These objects have deferred execution for some arguments, and the
1675 execution is now completed before the SizeOf is executed. This problem caused
1676 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore) BZ
1679 Implemented an enhancement to the interpreter "slack mode". In the absence of
1680 an explicit return or an implicitly returned object from the last executed
1681 opcode, a control method will now implicitly return an integer of value 0 for
1682 Microsoft compatibility. (Lin Ming) BZ 392
1684 Fixed a problem with the Load operator where an exception was not returned in
1685 the case where the table is already loaded. (Lin Ming) BZ 463
1687 Implemented support for the use of DDBHandles as an Indexed Reference, as per
1688 the ACPI spec. (Lin Ming) BZ 486
1690 Implemented support for UserTerm (Method invocation) for the Unload operator
1691 as per the ACPI spec. (Lin Ming) BZ 580
1693 Fixed a problem with the LoadTable operator where the OemId and OemTableId
1694 input strings could cause unexpected failures if they were shorter than the
1695 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
1697 Implemented support for UserTerm (Method invocation) for the Unload operator
1698 as per the ACPI spec. (Lin Ming) BZ 580
1700 Implemented header file support for new ACPI tables - BERT, ERST, EINJ, HEST,
1701 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
1703 Example Code and Data Size: These are the sizes for the OS-independent
1704 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1705 debug version of the code includes the debug output trace mechanism and has
1706 a much larger code and data size.
1709 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1710 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1712 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1713 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1715 2) iASL Compiler/Disassembler and Tools:
1717 Implemented support in the disassembler for checksum validation on incoming
1718 binary DSDTs and SSDTs. If incorrect, a message is displayed within the table
1719 header dump at the start of the disassembly.
1721 Implemented additional debugging information in the namespace listing file
1722 created during compilation. In addition to the namespace hierarchy, the full
1723 pathname to each namespace object is displayed.
1725 Fixed a problem with the disassembler where invalid ACPI tables could cause
1726 faults or infinite loops.
1728 Fixed an unexpected parse error when using the optional "parameter types"
1729 list in a control method declaration. (Lin Ming) BZ 397
1731 Fixed a problem where two External declarations with the same name did not
1732 cause an error (Lin Ming) BZ 509
1734 Implemented support for full TermArgs (adding Argx, Localx and method
1735 invocation) for the ParameterData parameter to the LoadTable operator. (Lin
1738 ----------------------------------------
1739 19 December 2007. Summary of changes for version 20071219:
1741 1) ACPI CA Core Subsystem:
1743 Implemented full support for deferred execution for the TermArg string
1744 arguments for DataTableRegion. This enables forward references and full
1745 operand resolution for the three string arguments. Similar to OperationRegion
1746 deferred argument execution.) Lin Ming. BZ 430
1748 Implemented full argument resolution support for the BankValue argument to
1749 BankField. Previously, only constants were supported, now any TermArg may be
1750 used. Lin Ming BZ 387, 393
1752 Fixed a problem with AcpiGetDevices where the search of a branch of the
1753 device tree could be terminated prematurely. In accordance with the ACPI
1754 specification, the search down the current branch is terminated if a device
1755 is both not present and not functional (instead of just not present.) Yakui
1758 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly if
1759 the underlying AML code changed the GPE enable registers. Now, any unknown
1760 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately disabled
1761 instead of simply ignored. Rui Zhang.
1763 Fixed a problem with Index Fields where the Index register was incorrectly
1764 limited to a maximum of 32 bits. Now any size may be used.
1766 Fixed a couple memory leaks associated with "implicit return" objects when
1767 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
1769 Example Code and Data Size: These are the sizes for the OS-independent
1770 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1771 debug version of the code includes the debug output trace mechanism and has
1772 a much larger code and data size.
1775 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1776 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1778 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1779 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1781 ----------------------------------------
1782 14 November 2007. Summary of changes for version 20071114:
1784 1) ACPI CA Core Subsystem:
1786 Implemented event counters for each of the Fixed Events, the ACPI SCI
1787 (interrupt) itself, and control methods executed. Named
1788 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively. These
1789 should be useful for debugging and statistics.
1791 Implemented a new external interface, AcpiGetStatistics, to retrieve the
1792 contents of the various event counters. Returns the current values for
1793 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
1794 AcpiMethodCount. The interface can be expanded in the future if new counters
1795 are added. Device drivers should use this interface rather than access the
1798 Fixed a problem with the FromBCD and ToBCD operators. With some compilers,
1799 the ShortDivide function worked incorrectly, causing problems with the BCD
1800 functions with large input values. A truncation from 64-bit to 32-bit
1801 inadvertently occurred. Internal BZ 435. Lin Ming
1803 Fixed a problem with Index references passed as method arguments. References
1804 passed as arguments to control methods were dereferenced immediately (before
1805 control was passed to the called method). The references are now correctly
1806 passed directly to the called method. BZ 5389. Lin Ming
1808 Fixed a problem with CopyObject used in conjunction with the Index operator.
1809 The reference was incorrectly dereferenced before the copy. The reference is
1810 now correctly copied. BZ 5391. Lin Ming
1812 Fixed a problem with Control Method references within Package objects. These
1813 references are now correctly generated. This completes the package
1814 construction overhaul that began in version 20071019.
1816 Example Code and Data Size: These are the sizes for the OS-independent
1817 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1818 debug version of the code includes the debug output trace mechanism and has
1819 a much larger code and data size.
1822 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1823 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1825 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1826 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1829 2) iASL Compiler/Disassembler and Tools:
1831 The AcpiExec utility now installs handlers for all of the predefined
1832 Operation Region types. New types supported are: PCI_Config, CMOS, and
1835 Fixed a problem with the 64-bit version of AcpiExec where the extended (64-
1836 bit) address fields for the DSDT and FACS within the FADT were not being
1837 used, causing truncation of the upper 32-bits of these addresses. Lin Ming
1840 ----------------------------------------
1841 19 October 2007. Summary of changes for version 20071019:
1843 1) ACPI CA Core Subsystem:
1845 Fixed a problem with the Alias operator when the target of the alias is a
1846 named ASL operator that opens a new scope -- Scope, Device, PowerResource,
1847 Processor, and ThermalZone. In these cases, any children of the original
1848 operator could not be accessed via the alias, potentially causing unexpected
1849 AE_NOT_FOUND exceptions. (BZ 9067)
1851 Fixed a problem with the Package operator where all named references were
1852 created as object references and left otherwise unresolved. According to the
1853 ACPI specification, a Package can only contain Data Objects or references to
1854 control methods. The implication is that named references to Data Objects
1855 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
1856 immediately upon package creation. This is the approach taken with this
1857 change. References to all other named objects (Methods, Devices, Scopes,
1858 etc.) are all now properly created as reference objects. (BZ 5328)
1860 Reverted a change to Notify handling that was introduced in version
1861 20070508. This version changed the Notify handling from asynchronous to
1862 fully synchronous (Device driver Notify handling with respect to the Notify
1863 ASL operator). It was found that this change caused more problems than it
1864 solved and was removed by most users.
1866 Fixed a problem with the Increment and Decrement operators where the type of
1867 the target object could be unexpectedly and incorrectly changed. (BZ 353)
1870 Fixed a problem with the Load and LoadTable operators where the table
1871 location within the namespace was ignored. Instead, the table was always
1872 loaded into the root or current scope. Lin Ming.
1874 Fixed a problem with the Load operator when loading a table from a buffer
1875 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
1877 Fixed a problem with the Debug object where a store of a DdbHandle reference
1878 object to the Debug object could cause a fault.
1880 Added a table checksum verification for the Load operator, in the case where
1881 the load is from a buffer. (BZ 578).
1883 Implemented additional parameter validation for the LoadTable operator. The
1884 length of the input strings SignatureString, OemIdString, and OemTableId are
1885 now checked for maximum lengths. (BZ 582) Lin Ming.
1887 Example Code and Data Size: These are the sizes for the OS-independent
1888 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1889 debug version of the code includes the debug output trace mechanism and has
1890 a much larger code and data size.
1893 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1894 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1896 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1897 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1900 2) iASL Compiler/Disassembler:
1902 Fixed a problem where if a single file was specified and the file did not
1903 exist, no error message was emitted. (Introduced with wildcard support in
1906 ----------------------------------------
1907 19 September 2007. Summary of changes for version 20070919:
1909 1) ACPI CA Core Subsystem:
1911 Designed and implemented new external interfaces to install and remove
1912 handlers for ACPI table-related events. Current events that are defined are
1913 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
1914 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
1915 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
1917 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
1918 (acpi_serialized option on Linux) could cause some systems to hang during
1919 initialization. (Bob Moore) BZ 8171
1921 Fixed a problem where objects of certain types (Device, ThermalZone,
1922 Processor, PowerResource) can be not found if they are declared and
1923 referenced from within the same control method (Lin Ming) BZ 341
1925 Example Code and Data Size: These are the sizes for the OS-independent
1926 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1927 debug version of the code includes the debug output trace mechanism and has
1928 a much larger code and data size.
1931 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1932 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1934 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1935 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1938 2) iASL Compiler/Disassembler:
1940 Implemented support to allow multiple files to be compiled/disassembled in a
1941 single invocation. This includes command line wildcard support for both the
1942 Windows and Unix versions of the compiler. This feature simplifies the
1943 disassembly and compilation of multiple ACPI tables in a single directory.
1945 ----------------------------------------
1946 08 May 2007. Summary of changes for version 20070508:
1948 1) ACPI CA Core Subsystem:
1950 Implemented a Microsoft compatibility design change for the handling of the
1951 Notify AML operator. Previously, notify handlers were dispatched and
1952 executed completely asynchronously in a deferred thread. The new design
1953 still executes the notify handlers in a different thread, but the original
1954 thread that executed the Notify() now waits at a synchronization point for
1955 the notify handler to complete. Some machines depend on a synchronous Notify
1956 operator in order to operate correctly.
1958 Implemented support to allow Package objects to be passed as method
1959 arguments to the external AcpiEvaluateObject interface. Previously, this
1960 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
1961 implemented since there were no reserved control methods that required it
1964 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs that
1965 contained invalid non-zero values in reserved fields could cause later
1966 failures because these fields have meaning in later revisions of the FADT.
1967 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The fields
1968 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
1970 Fixed a problem where the Global Lock handle was not properly updated if a
1971 thread that acquired the Global Lock via executing AML code then attempted
1972 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by Joe
1975 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
1976 could be corrupted if the interrupt being removed was at the head of the
1977 list. Reported by Linn Crosetto.
1979 Example Code and Data Size: These are the sizes for the OS-independent
1980 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1981 debug version of the code includes the debug output trace mechanism and has
1982 a much larger code and data size.
1985 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1986 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
1988 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1989 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1991 ----------------------------------------
1992 20 March 2007. Summary of changes for version 20070320:
1994 1) ACPI CA Core Subsystem:
1996 Implemented a change to the order of interpretation and evaluation of AML
1997 operand objects within the AML interpreter. The interpreter now evaluates
1998 operands in the order that they appear in the AML stream (and the
1999 corresponding ASL code), instead of in the reverse order (after the entire
2000 operand list has been parsed). The previous behavior caused several subtle
2001 incompatibilities with the Microsoft AML interpreter as well as being
2002 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
2004 Implemented a change to the ACPI Global Lock support. All interfaces to the
2005 global lock now allow the same thread to acquire the lock multiple times.
2006 This affects the AcpiAcquireGlobalLock external interface to the global lock
2007 as well as the internal use of the global lock to support AML fields -- a
2008 control method that is holding the global lock can now simultaneously access
2009 AML fields that require global lock protection. Previously, in both cases,
2010 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change to
2011 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
2012 Controller. There is no change to the behavior of the AML Acquire operator,
2013 as this can already be used to acquire a mutex multiple times by the same
2014 thread. BZ 8066. With assistance from Alexey Starikovskiy.
2016 Fixed a problem where invalid objects could be referenced in the AML
2017 Interpreter after error conditions. During operand evaluation, ensure that
2018 the internal "Return Object" field is cleared on error and only valid
2019 pointers are stored there. Caused occasional access to deleted objects that
2020 resulted in "large reference count" warning messages. Valery Podrezov.
2022 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur on
2023 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
2026 Fixed an internal problem with the handling of result objects on the
2027 interpreter result stack. BZ 7872. Valery Podrezov.
2029 Removed obsolete code that handled the case where AML_NAME_OP is the target
2030 of a reference (Reference.Opcode). This code was no longer necessary. BZ
2031 7874. Valery Podrezov.
2033 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This was a
2034 remnant from the previously discontinued 16-bit support.
2036 Example Code and Data Size: These are the sizes for the OS-independent
2037 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2038 debug version of the code includes the debug output trace mechanism and has
2039 a much larger code and data size.
2042 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2043 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
2045 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2046 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
2048 ----------------------------------------
2049 26 January 2007. Summary of changes for version 20070126:
2051 1) ACPI CA Core Subsystem:
2053 Added the 2007 copyright to all module headers and signons. This affects
2054 virtually every file in the ACPICA core subsystem, the iASL compiler, and
2057 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
2058 during a table load. A bad pointer was passed in the case where the DSDT is
2059 overridden, causing a fault in this case.
2061 Example Code and Data Size: These are the sizes for the OS-independent
2062 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2063 debug version of the code includes the debug output trace mechanism and has
2064 a much larger code and data size.
2067 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2068 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
2070 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2071 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
2073 ----------------------------------------
2074 15 December 2006. Summary of changes for version 20061215:
2076 1) ACPI CA Core Subsystem:
2078 Support for 16-bit ACPICA has been completely removed since it is no longer
2079 necessary and it clutters the code. All 16-bit macros, types, and
2080 conditional compiles have been removed, cleaning up and simplifying the code
2081 across the entire subsystem. DOS support is no longer needed since the
2082 bootable Linux firmware kit is now available.
2084 The handler for the Global Lock is now removed during AcpiTerminate to
2085 enable a clean subsystem restart, via the implementation of the
2086 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
2089 Implemented enhancements to the multithreading support within the debugger
2090 to enable improved multithreading debugging and evaluation of the subsystem.
2093 Debugger: Enhanced the Statistics/Memory command to emit the total (maximum)
2094 memory used during the execution, as well as the maximum memory consumed by
2095 each of the various object types. (Valery Podrezov)
2097 Example Code and Data Size: These are the sizes for the OS-independent
2098 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2099 debug version of the code includes the debug output trace mechanism and has
2100 a much larger code and data size.
2103 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
2104 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
2106 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
2107 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
2110 2) iASL Compiler/Disassembler and Tools:
2112 AcpiExec: Implemented a new option (-m) to display full memory use
2113 statistics upon subsystem/program termination. (Valery Podrezov)
2115 ----------------------------------------
2116 09 November 2006. Summary of changes for version 20061109:
2118 1) ACPI CA Core Subsystem:
2120 Optimized the Load ASL operator in the case where the source operand is an
2121 operation region. Simply map the operation region memory, instead of
2122 performing a bytewise read. (Region must be of type SystemMemory, see
2125 Fixed the Load ASL operator for the case where the source operand is a
2126 region field. A buffer object is also allowed as the source operand. BZ 480
2128 Fixed a problem where the Load ASL operator allowed the source operand to be
2129 an operation region of any type. It is now restricted to regions of type
2130 SystemMemory, as per the ACPI specification. BZ 481
2132 Additional cleanup and optimizations for the new Table Manager code.
2134 AcpiEnable will now fail if all of the required ACPI tables are not loaded
2135 (FADT, FACS, DSDT). BZ 477
2137 Added #pragma pack(8/4) to acobject.h to ensure that the structures in this
2138 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
2139 manually optimized to be aligned and will not work if it is byte-packed.
2141 Example Code and Data Size: These are the sizes for the OS-independent
2142 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2143 debug version of the code includes the debug output trace mechanism and has
2144 a much larger code and data size.
2147 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
2148 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
2150 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
2151 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
2154 2) iASL Compiler/Disassembler and Tools:
2156 Fixed a problem where the presence of the _OSI predefined control method
2157 within complex expressions could cause an internal compiler error.
2159 AcpiExec: Implemented full region support for multiple address spaces.
2160 SpaceId is now part of the REGION object. BZ 429
2162 ----------------------------------------
2163 11 October 2006. Summary of changes for version 20061011:
2165 1) ACPI CA Core Subsystem:
2167 Completed an AML interpreter performance enhancement for control method
2168 execution. Previously a 2-pass parse/execution, control methods are now
2169 completely parsed and executed in a single pass. This improves overall
2170 interpreter performance by ~25%, reduces code size, and reduces CPU stack
2171 use. (Valery Podrezov + interpreter changes in version 20051202 that
2172 eliminated namespace loading during the pass one parse.)
2174 Implemented _CID support for PCI Root Bridge detection. If the _HID does not
2175 match the predefined PCI Root Bridge IDs, the _CID list (if present) is now
2176 obtained and also checked for an ID match.
2178 Implemented additional support for the PCI _ADR execution: upsearch until a
2179 device scope is found before executing _ADR. This allows PCI_Config
2180 operation regions to be declared locally within control methods underneath
2183 Fixed a problem with a possible race condition between threads executing
2184 AcpiWalkNamespace and the AML interpreter. This condition was removed by
2185 modifying AcpiWalkNamespace to (by default) ignore all temporary namespace
2186 entries created during any concurrent control method execution. An
2187 additional namespace race condition is known to exist between
2188 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
2191 Restructured the AML ParseLoop function, breaking it into several
2192 subfunctions in order to reduce CPU stack use and improve maintainability.
2195 AcpiGetHandle: Fix for parameter validation to detect invalid combinations
2196 of prefix handle and pathname. BZ 478
2198 Example Code and Data Size: These are the sizes for the OS-independent
2199 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2200 debug version of the code includes the debug output trace mechanism and has
2201 a much larger code and data size.
2204 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2205 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
2207 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
2208 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
2210 2) iASL Compiler/Disassembler and Tools:
2212 Ported the -g option (get local ACPI tables) to the new ACPICA Table Manager
2213 to restore original behavior.
2215 ----------------------------------------
2216 27 September 2006. Summary of changes for version 20060927:
2218 1) ACPI CA Core Subsystem:
2220 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
2221 These functions now use a spinlock for mutual exclusion and the interrupt
2222 level indication flag is not needed.
2224 Fixed a problem with the Global Lock where the lock could appear to be
2225 obtained before it is actually obtained. The global lock semaphore was
2226 inadvertently created with one unit instead of zero units. (BZ 464) Fiodor
2229 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue during
2230 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
2232 Example Code and Data Size: These are the sizes for the OS-independent
2233 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2234 debug version of the code includes the debug output trace mechanism and has
2235 a much larger code and data size.
2238 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2239 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
2241 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2242 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
2245 2) iASL Compiler/Disassembler and Tools:
2247 Fixed a compilation problem with the pre-defined Resource Descriptor field
2248 names where an "object does not exist" error could be incorrectly generated
2249 if the parent ResourceTemplate pathname places the template within a
2250 different namespace scope than the current scope. (BZ 7212)
2252 Fixed a problem where the compiler could hang after syntax errors detected
2253 in an ElseIf construct. (BZ 453)
2255 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
2256 operator. An incorrect output filename was produced when this parameter was
2257 a null string (""). Now, the original input filename is used as the AML
2258 output filename, with an ".aml" extension.
2260 Implemented a generic batch command mode for the AcpiExec utility (execute
2261 any AML debugger command) (Valery Podrezov).
2263 ----------------------------------------
2264 12 September 2006. Summary of changes for version 20060912:
2266 1) ACPI CA Core Subsystem:
2268 Enhanced the implementation of the "serialized mode" of the interpreter
2269 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
2270 specified, instead of creating a serialization semaphore per control method,
2271 the interpreter lock is simply no longer released before a blocking
2272 operation during control method execution. This effectively makes the AML
2273 Interpreter single-threaded. The overhead of a semaphore per-method is
2276 Fixed a regression where an error was no longer emitted if a control method
2277 attempts to create 2 objects of the same name. This once again returns
2278 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism that
2279 will dynamically serialize the control method to possible prevent future
2282 Integrated a fix for a problem with PCI Express HID detection in the PCI
2283 Config Space setup procedure. (BZ 7145)
2285 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
2286 AcpiHwInitialize function - the FADT registers are now validated when the
2289 Added two new warnings during FADT verification - 1) if the FADT is larger
2290 than the largest known FADT version, and 2) if there is a mismatch between a
2291 32-bit block address and the 64-bit X counterpart (when both are non-zero.)
2293 Example Code and Data Size: These are the sizes for the OS-independent
2294 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2295 debug version of the code includes the debug output trace mechanism and has
2296 a much larger code and data size.
2299 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
2300 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
2302 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
2303 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
2306 2) iASL Compiler/Disassembler and Tools:
2308 Fixed a problem with the implementation of the Switch() operator where the
2309 temporary variable was declared too close to the actual Switch, instead of
2310 at method level. This could cause a problem if the Switch() operator is
2311 within a while loop, causing an error on the second iteration. (BZ 460)
2313 Disassembler - fix for error emitted for unknown type for target of scope
2314 operator. Now, ignore it and continue.
2316 Disassembly of an FADT now verifies the input FADT and reports any errors
2317 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
2319 Disassembly of raw data buffers with byte initialization data now prefixes
2320 each output line with the current buffer offset.
2322 Disassembly of ASF! table now includes all variable-length data fields at
2323 the end of some of the subtables.
2325 The disassembler now emits a comment if a buffer appears to be a
2326 ResourceTemplate, but cannot be disassembled as such because the EndTag does
2327 not appear at the very end of the buffer.
2329 AcpiExec - Added the "-t" command line option to enable the serialized mode
2330 of the AML interpreter.
2332 ----------------------------------------
2333 31 August 2006. Summary of changes for version 20060831:
2335 1) ACPI CA Core Subsystem:
2337 Miscellaneous fixes for the Table Manager:
2338 - Correctly initialize internal common FADT for all 64-bit "X" fields
2339 - Fixed a couple table mapping issues during table load
2340 - Fixed a couple alignment issues for IA64
2341 - Initialize input array to zero in AcpiInitializeTables
2342 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
2345 Change for GPE support: when a "wake" GPE is received, all wake GPEs are now
2346 immediately disabled to prevent the waking GPE from firing again and to
2347 prevent other wake GPEs from interrupting the wake process.
2349 Added the AcpiGpeCount global that tracks the number of processed GPEs, to
2350 be used for debugging systems with a large number of ACPI interrupts.
2352 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
2353 both the ACPICA headers and the disassembler.
2355 Example Code and Data Size: These are the sizes for the OS-independent
2356 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2357 debug version of the code includes the debug output trace mechanism and has
2358 a much larger code and data size.
2361 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2362 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2364 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
2365 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
2368 2) iASL Compiler/Disassembler and Tools:
2370 Disassembler support for the DMAR ACPI table.
2372 ----------------------------------------
2373 23 August 2006. Summary of changes for version 20060823:
2375 1) ACPI CA Core Subsystem:
2377 The Table Manager component has been completely redesigned and
2378 reimplemented. The new design is much simpler, and reduces the overall code
2379 and data size of the kernel-resident ACPICA by approximately 5%. Also, it is
2380 now possible to obtain the ACPI tables very early during kernel
2381 initialization, even before dynamic memory management is initialized.
2382 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
2384 Obsolete ACPICA interfaces:
2386 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel init
2388 - AcpiLoadTable: Not needed.
2389 - AcpiUnloadTable: Not needed.
2391 New ACPICA interfaces:
2393 - AcpiInitializeTables: Must be called before the table manager can be used.
2394 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
2395 allocated memory after it becomes available.
2396 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI tables
2399 Other ACPICA changes:
2401 - AcpiGetTableHeader returns the actual mapped table header, not a copy. Use
2402 AcpiOsUnmapMemory to free this mapping.
2403 - AcpiGetTable returns the actual mapped table. The mapping is managed
2404 internally and must not be deleted by the caller. Use of this interface
2405 causes no additional dynamic memory allocation.
2406 - AcpiFindRootPointer: Support for physical addressing has been eliminated,
2407 it appeared to be unused.
2408 - The interface to AcpiOsMapMemory has changed to be consistent with the
2409 other allocation interfaces.
2410 - The interface to AcpiOsGetRootPointer has changed to eliminate unnecessary
2412 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on 64-
2413 bit platforms. Was previously 64 bits on all platforms.
2414 - The interface to the ACPI Global Lock acquire/release macros have changed
2415 slightly since ACPICA no longer keeps a local copy of the FACS with a
2416 constructed pointer to the actual global lock.
2418 Porting to the new table manager:
2420 - AcpiInitializeTables: Must be called once, and can be called anytime
2421 during the OS initialization process. It allows the host to specify an area
2422 of memory to be used to store the internal version of the RSDT/XSDT (root
2423 table). This allows the host to access ACPI tables before memory management
2424 is initialized and running.
2425 - AcpiReallocateRootTable: Can be called after memory management is running
2426 to copy the root table to a dynamically allocated array, freeing up the
2427 scratch memory specified in the call to AcpiInitializeTables.
2428 - AcpiSubsystemInitialize: This existing interface is independent of the
2429 Table Manager, and does not have to be called before the Table Manager can
2430 be used, it only must be called before the rest of ACPICA can be used.
2431 - ACPI Tables: Some changes have been made to the names and structure of the
2432 actbl.h and actbl1.h header files and may require changes to existing code.
2433 For example, bitfields have been completely removed because of their lack of
2434 portability across C compilers.
2435 - Update interfaces to the Global Lock acquire/release macros if local
2436 versions are used. (see acwin.h)
2438 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
2442 Example Code and Data Size: These are the sizes for the OS-independent
2443 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2444 debug version of the code includes the debug output trace mechanism and has
2445 a much larger code and data size.
2448 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2449 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2451 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
2452 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
2455 2) iASL Compiler/Disassembler and Tools:
2457 No changes for this release.
2459 ----------------------------------------
2460 21 July 2006. Summary of changes for version 20060721:
2462 1) ACPI CA Core Subsystem:
2464 The full source code for the ASL test suite used to validate the iASL
2465 compiler and the ACPICA core subsystem is being released with the ACPICA
2466 source for the first time. The source is contained in a separate package and
2467 consists of over 1100 files that exercise all ASL/AML operators. The package
2468 should appear on the Intel/ACPI web site shortly. (Valery Podrezov, Fiodor
2471 Completed a new design and implementation for support of the ACPI Global
2472 Lock. On the OS side, the global lock is now treated as a standard AML
2473 mutex. Previously, multiple OS threads could "acquire" the global lock
2474 simultaneously. However, this could cause the BIOS to be starved out of the
2475 lock - especially in cases such as the Embedded Controller driver where
2476 there is a tight coupling between the OS and the BIOS.
2478 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
2479 The Global Lock interrupt handler no longer queues the execution of a
2480 separate thread to signal the global lock semaphore. Instead, the semaphore
2481 is signaled directly from the interrupt handler.
2483 Implemented support within the AML interpreter for package objects that
2484 contain a larger AML length (package list length) than the package element
2485 count. In this case, the length of the package is truncated to match the
2486 package element count. Some BIOS code apparently modifies the package length
2487 on the fly, and this change supports this behavior. Provides compatibility
2488 with the MS AML interpreter. (With assistance from Fiodor Suietov)
2490 Implemented a temporary fix for the BankValue parameter of a Bank Field to
2491 support all constant values, now including the Zero and One opcodes.
2492 Evaluation of this parameter must eventually be converted to a full TermArg
2493 evaluation. A not-implemented error is now returned (temporarily) for non-
2494 constant values for this parameter.
2496 Fixed problem reports (Fiodor Suietov) integrated:
2497 - Fix for premature object deletion after CopyObject on Operation Region (BZ
2500 Example Code and Data Size: These are the sizes for the OS-independent
2501 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2502 debug version of the code includes the debug output trace mechanism and has
2503 a much larger code and data size.
2506 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
2507 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
2509 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2510 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2513 2) iASL Compiler/Disassembler and Tools:
2515 No changes for this release.
2517 ----------------------------------------
2518 07 July 2006. Summary of changes for version 20060707:
2520 1) ACPI CA Core Subsystem:
2522 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
2523 that do not allow the initialization of address pointers within packed
2524 structures - even though the hardware itself may support misaligned
2525 transfers. Some of the debug data structures are packed by default to
2528 Added an error message for the case where AcpiOsGetThreadId() returns zero.
2529 A non-zero value is required by the core ACPICA code to ensure the proper
2530 operation of AML mutexes and recursive control methods.
2532 The DSDT is now the only ACPI table that determines whether the AML
2533 interpreter is in 32-bit or 64-bit mode. Not really a functional change, but
2534 the hooks for per-table 32/64 switching have been removed from the code. A
2535 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
2537 Fixed a possible leak of an OwnerID in the error path of
2538 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
2539 deletion to a single place in AcpiTbUninstallTable to correct possible leaks
2540 when using the AcpiTbDeleteTablesByType interface (with assistance from
2543 Fixed a problem with Serialized control methods where the semaphore
2544 associated with the method could be over-signaled after multiple method
2547 Fixed two issues with the locking of the internal namespace data structure.
2548 Both the Unload() operator and AcpiUnloadTable interface now lock the
2549 namespace during the namespace deletion associated with the table unload
2550 (with assistance from Linn Crosetto.)
2552 Fixed problem reports (Valery Podrezov) integrated:
2553 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
2555 Fixed problem reports (Fiodor Suietov) integrated:
2556 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
2557 - On Address Space handler deletion, needless deactivation call (BZ 374)
2558 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375)
2559 - Possible memory leak, Notify sub-objects of Processor, Power, ThermalZone
2561 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
2562 - Minimum Length of RSDT should be validated (BZ 379)
2563 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
2565 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type loaded
2568 Example Code and Data Size: These are the sizes for the OS-independent
2569 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2570 debug version of the code includes the debug output trace mechanism and has
2571 a much larger code and data size.
2574 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2575 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2577 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
2578 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2581 2) iASL Compiler/Disassembler and Tools:
2583 Fixed problem reports:
2584 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
2587 ----------------------------------------
2588 23 June 2006. Summary of changes for version 20060623:
2590 1) ACPI CA Core Subsystem:
2592 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
2593 allows the type to be customized to the host OS for improved efficiency
2594 (since a spinlock is usually a very small object.)
2596 Implemented support for "ignored" bits in the ACPI registers. According to
2597 the ACPI specification, these bits should be preserved when writing the
2598 registers via a read/modify/write cycle. There are 3 bits preserved in this
2599 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
2601 Implemented the initial deployment of new OSL mutex interfaces. Since some
2602 host operating systems have separate mutex and semaphore objects, this
2603 feature was requested. The base code now uses mutexes (and the new mutex
2604 interfaces) wherever a binary semaphore was used previously. However, for
2605 the current release, the mutex interfaces are defined as macros to map them
2606 to the existing semaphore interfaces. Therefore, no OSL changes are required
2607 at this time. (See acpiosxf.h)
2609 Fixed several problems with the support for the control method SyncLevel
2610 parameter. The SyncLevel now works according to the ACPI specification and
2611 in concert with the Mutex SyncLevel parameter, since the current SyncLevel
2612 is a property of the executing thread. Mutual exclusion for control methods
2613 is now implemented with a mutex instead of a semaphore.
2615 Fixed three instances of the use of the C shift operator in the bitfield
2616 support code (exfldio.c) to avoid the use of a shift value larger than the
2617 target data width. The behavior of C compilers is undefined in this case and
2618 can cause unpredictable results, and therefore the case must be detected and
2619 avoided. (Fiodor Suietov)
2621 Added an info message whenever an SSDT or OEM table is loaded dynamically
2622 via the Load() or LoadTable() ASL operators. This should improve debugging
2623 capability since it will show exactly what tables have been loaded (beyond
2624 the tables present in the RSDT/XSDT.)
2626 Example Code and Data Size: These are the sizes for the OS-independent
2627 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2628 debug version of the code includes the debug output trace mechanism and has
2629 a much larger code and data size.
2632 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2633 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2635 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2636 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2639 2) iASL Compiler/Disassembler and Tools:
2641 No changes for this release.
2643 ----------------------------------------
2644 08 June 2006. Summary of changes for version 20060608:
2646 1) ACPI CA Core Subsystem:
2648 Converted the locking mutex used for the ACPI hardware to a spinlock. This
2649 change should eliminate all problems caused by attempting to acquire a
2650 semaphore at interrupt level, and it means that all ACPICA external
2651 interfaces that directly access the ACPI hardware can be safely called from
2652 interrupt level. OSL code that implements the semaphore interfaces should be
2653 able to eliminate any workarounds for being called at interrupt level.
2655 Fixed a regression introduced in 20060526 where the ACPI device
2656 initialization could be prematurely aborted with an AE_NOT_FOUND if a device
2657 did not have an optional _INI method.
2659 Fixed an IndexField issue where a write to the Data Register should be
2660 limited in size to the AccessSize (width) of the IndexField itself. (BZ 433,
2663 Fixed problem reports (Valery Podrezov) integrated:
2664 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
2666 Fixed problem reports (Fiodor Suietov) integrated:
2667 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
2669 Removed four global mutexes that were obsolete and were no longer being
2672 Example Code and Data Size: These are the sizes for the OS-independent
2673 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2674 debug version of the code includes the debug output trace mechanism and has
2675 a much larger code and data size.
2678 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2679 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2681 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2682 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2685 2) iASL Compiler/Disassembler and Tools:
2687 Fixed a fault when using -g option (get tables from registry) on Windows
2690 Fixed problem reports integrated:
2691 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
2692 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
2694 - Global table revision override (-r) is ignored (BZ 413)
2696 ----------------------------------------
2697 26 May 2006. Summary of changes for version 20060526:
2699 1) ACPI CA Core Subsystem:
2701 Restructured, flattened, and simplified the internal interfaces for
2702 namespace object evaluation - resulting in smaller code, less CPU stack use,
2703 and fewer interfaces. (With assistance from Mikhail Kouzmich)
2705 Fixed a problem with the CopyObject operator where the first parameter was
2706 not typed correctly for the parser, interpreter, compiler, and disassembler.
2707 Caused various errors and unexpected behavior.
2709 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
2710 produced incorrect results with some C compilers. Since the behavior of C
2711 compilers when the shift value is larger than the datatype width is
2712 apparently not well defined, the interpreter now detects this condition and
2713 simply returns zero as expected in all such cases. (BZ 395)
2715 Fixed problem reports (Valery Podrezov) integrated:
2716 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
2717 - Allow interpreter to handle nested method declarations (BZ 5361)
2719 Fixed problem reports (Fiodor Suietov) integrated:
2720 - AcpiTerminate doesn't free debug memory allocation list objects (BZ 355)
2721 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ 356)
2722 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
2723 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
2724 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
2725 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
2726 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
2727 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
2728 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ 365)
2729 - Status of the Global Initialization Handler call not used (BZ 366)
2730 - Incorrect object parameter to Global Initialization Handler (BZ 367)
2732 Example Code and Data Size: These are the sizes for the OS-independent
2733 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2734 debug version of the code includes the debug output trace mechanism and has
2735 a much larger code and data size.
2738 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2739 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2741 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2742 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2745 2) iASL Compiler/Disassembler and Tools:
2747 Modified the parser to allow the names IO, DMA, and IRQ to be used as
2748 namespace identifiers with no collision with existing resource descriptor
2749 macro names. This provides compatibility with other ASL compilers and is
2750 most useful for disassembly/recompilation of existing tables without parse
2751 errors. (With assistance from Thomas Renninger)
2753 Disassembler: fixed an incorrect disassembly problem with the
2754 DataTableRegion and CopyObject operators. Fixed a possible fault during
2755 disassembly of some Alias operators.
2757 ----------------------------------------
2758 12 May 2006. Summary of changes for version 20060512:
2760 1) ACPI CA Core Subsystem:
2762 Replaced the AcpiOsQueueForExecution interface with a new interface named
2763 AcpiOsExecute. The major difference is that the new interface does not have
2764 a Priority parameter, this appeared to be useless and has been replaced by a
2765 Type parameter. The Type tells the host what type of execution is being
2766 requested, such as global lock handler, notify handler, GPE handler, etc.
2767 This allows the host to queue and execute the request as appropriate for the
2768 request type, possibly using different work queues and different priorities
2769 for the various request types. This enables fixes for multithreading
2770 deadlock problems such as BZ #5534, and will require changes to all existing
2771 OS interface layers. (Alexey Starikovskiy and Bob Moore)
2773 Fixed a possible memory leak associated with the support for the so-called
2774 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
2777 Fixed a problem with the Load() operator where a table load from an
2778 operation region could overwrite an internal table buffer by up to 7 bytes
2779 and cause alignment faults on IPF systems. (With assistance from Luming Yu)
2781 Example Code and Data Size: These are the sizes for the OS-independent
2782 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2783 debug version of the code includes the debug output trace mechanism and has
2784 a much larger code and data size.
2787 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2788 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2790 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2791 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2795 2) iASL Compiler/Disassembler and Tools:
2797 Disassembler: Implemented support to cross reference the internal namespace
2798 and automatically generate ASL External() statements for symbols not defined
2799 within the current table being disassembled. This will simplify the
2800 disassembly and recompilation of interdependent tables such as SSDTs since
2801 these statements will no longer have to be added manually.
2803 Disassembler: Implemented experimental support to automatically detect
2804 invocations of external control methods and generate appropriate External()
2805 statements. This is problematic because the AML cannot be correctly parsed
2806 until the number of arguments for each control method is known. Currently,
2807 standalone method invocations and invocations as the source operand of a
2808 Store() statement are supported.
2810 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
2811 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
2812 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
2813 more readable and likely closer to the original ASL source.
2815 ----------------------------------------
2816 21 April 2006. Summary of changes for version 20060421:
2818 1) ACPI CA Core Subsystem:
2820 Removed a device initialization optimization introduced in 20051216 where
2821 the _STA method was not run unless an _INI was also present for the same
2822 device. This optimization could cause problems because it could allow _INI
2823 methods to be run within a not-present device subtree. (If a not-present
2824 device had no _INI, _STA would not be run, the not-present status would not
2825 be discovered, and the children of the device would be incorrectly
2828 Implemented a new _STA optimization where namespace subtrees that do not
2829 contain _INI are identified and ignored during device initialization.
2830 Selectively running _STA can significantly improve boot time on large
2831 machines (with assistance from Len Brown.)
2833 Implemented support for the device initialization case where the returned
2834 _STA flags indicate a device not-present but functioning. In this case, _INI
2835 is not run, but the device children are examined for presence, as per the
2838 Implemented an additional change to the IndexField support in order to
2839 conform to MS behavior. The value written to the Index Register is not
2840 simply a byte offset, it is a byte offset in units of the access width of
2841 the parent Index Field. (Fiodor Suietov)
2843 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
2844 interface is called during the creation of all AML operation regions, and
2845 allows the host OS to exert control over what addresses it will allow the
2846 AML code to access. Operation Regions whose addresses are disallowed will
2847 cause a runtime exception when they are actually accessed (will not affect
2848 or abort table loading.) See oswinxf or osunixxf for an example
2851 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
2852 interface allows the host OS to match the various "optional"
2853 interface/behavior strings for the _OSI predefined control method as
2854 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
2855 for an example implementation.
2857 Restructured and corrected various problems in the exception handling code
2858 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
2859 (with assistance from Takayoshi Kochi.)
2861 Modified the Linux source converter to ignore quoted string literals while
2862 converting identifiers from mixed to lower case. This will correct problems
2863 with the disassembler and other areas where such strings must not be
2866 The ACPI_FUNCTION_* macros no longer require quotes around the function
2867 name. This allows the Linux source converter to convert the names, now that
2868 the converter ignores quoted strings.
2870 Example Code and Data Size: These are the sizes for the OS-independent
2871 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2872 debug version of the code includes the debug output trace mechanism and has
2873 a much larger code and data size.
2877 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2878 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2880 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2881 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2884 2) iASL Compiler/Disassembler and Tools:
2886 Implemented 3 new warnings for iASL, and implemented multiple warning levels
2889 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is not
2890 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
2891 check for the possible timeout, a warning is issued.
2893 2) Useless operators: If an ASL operator does not specify an optional target
2894 operand and it also does not use the function return value from the
2895 operator, a warning is issued since the operator effectively does nothing.
2897 3) Unreferenced objects: If a namespace object is created, but never
2898 referenced, a warning is issued. This is a warning level 2 since there are
2899 cases where this is ok, such as when a secondary table is loaded that uses
2900 the unreferenced objects. Even so, care is taken to only flag objects that
2901 don't look like they will ever be used. For example, the reserved methods
2902 (starting with an underscore) are usually not referenced because it is
2903 expected that the OS will invoke them.
2905 ----------------------------------------
2906 31 March 2006. Summary of changes for version 20060331:
2908 1) ACPI CA Core Subsystem:
2910 Implemented header file support for the following additional ACPI tables:
2911 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this support,
2912 all current and known ACPI tables are now defined in the ACPICA headers and
2913 are available for use by device drivers and other software.
2915 Implemented support to allow tables that contain ACPI names with invalid
2916 characters to be loaded. Previously, this would cause the table load to
2917 fail, but since there are several known cases of such tables on existing
2918 machines, this change was made to enable ACPI support for them. Also, this
2919 matches the behavior of the Microsoft ACPI implementation.
2921 Fixed a couple regressions introduced during the memory optimization in the
2922 20060317 release. The namespace node definition required additional
2923 reorganization and an internal datatype that had been changed to 8-bit was
2924 restored to 32-bit. (Valery Podrezov)
2926 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
2927 could be passed through to AcpiOsReleaseObject which is unexpected. Such
2928 null pointers are now trapped and ignored, matching the behavior of the
2929 previous implementation before the deployment of AcpiOsReleaseObject.
2930 (Valery Podrezov, Fiodor Suietov)
2932 Fixed a memory mapping leak during the deletion of a SystemMemory operation
2933 region where a cached memory mapping was not deleted. This became a
2934 noticeable problem for operation regions that are defined within frequently
2935 used control methods. (Dana Meyers)
2937 Reorganized the ACPI table header files into two main files: one for the
2938 ACPI tables consumed by the ACPICA core, and another for the miscellaneous
2939 ACPI tables that are consumed by the drivers and other software. The various
2940 FADT definitions were merged into one common section and three different
2941 tables (ACPI 1.0, 1.0+, and 2.0)
2943 Example Code and Data Size: These are the sizes for the OS-independent
2944 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2945 debug version of the code includes the debug output trace mechanism and has
2946 a much larger code and data size.
2949 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
2950 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
2952 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2953 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2956 2) iASL Compiler/Disassembler and Tools:
2958 Disassembler: Implemented support to decode and format all non-AML ACPI
2959 tables (tables other than DSDTs and SSDTs.) This includes the new tables
2960 added to the ACPICA headers, therefore all current and known ACPI tables are
2963 Disassembler: The change to allow ACPI names with invalid characters also
2964 enables the disassembly of such tables. Invalid characters within names are
2965 changed to '*' to make the name printable; the iASL compiler will still
2966 generate an error for such names, however, since this is an invalid ACPI
2969 Implemented an option for AcpiXtract (-a) to extract all tables found in the
2970 input file. The default invocation extracts only the DSDTs and SSDTs.
2972 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
2973 makefile for the AcpiXtract utility.
2975 ----------------------------------------
2976 17 March 2006. Summary of changes for version 20060317:
2978 1) ACPI CA Core Subsystem:
2980 Implemented the use of a cache object for all internal namespace nodes.
2981 Since there are about 1000 static nodes in a typical system, this will
2982 decrease memory use for cache implementations that minimize per-allocation
2983 overhead (such as a slab allocator.)
2985 Removed the reference count mechanism for internal namespace nodes, since it
2986 was deemed unnecessary. This reduces the size of each namespace node by
2987 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit case,
2988 and 32 bytes for the 64-bit case.
2990 Optimized several internal data structures to reduce object size on 64-bit
2991 platforms by packing data within the 64-bit alignment. This includes the
2992 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
2993 instances corresponding to the namespace objects.
2995 Added two new strings for the predefined _OSI method: "Windows 2001.1 SP1"
2998 Split the allocation tracking mechanism out to a separate file, from
2999 utalloc.c to uttrack.c. This mechanism appears to be only useful for
3000 application-level code. Kernels may wish to not include uttrack.c in
3003 Removed all remnants of the obsolete ACPI_REPORT_* macros and the associated
3004 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
3007 Code and Data Size: These are the sizes for the acpica.lib produced by the
3008 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
3009 driver or OSPM code. The debug version of the code includes the debug output
3010 trace mechanism and has a much larger code and data size. Note that these
3011 values will vary depending on the efficiency of the compiler and the
3012 compiler options used during generation.
3015 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3016 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
3018 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
3019 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
3022 2) iASL Compiler/Disassembler and Tools:
3024 Implemented an ANSI C version of the acpixtract utility. This version will
3025 automatically extract the DSDT and all SSDTs from the input acpidump text
3026 file and dump the binary output to separate files. It can also display a
3027 summary of the input file including the headers for each table found and
3028 will extract any single ACPI table, with any signature. (See
3029 source/tools/acpixtract)
3031 ----------------------------------------
3032 10 March 2006. Summary of changes for version 20060310:
3034 1) ACPI CA Core Subsystem:
3036 Tagged all external interfaces to the subsystem with the new
3037 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to assist
3038 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
3039 macro. The default definition is NULL.
3041 Added the ACPI_THREAD_ID type for the return value from AcpiOsGetThreadId.
3042 This allows the host to define this as necessary to simplify kernel
3043 integration. The default definition is ACPI_NATIVE_UINT.
3045 Fixed two interpreter problems related to error processing, the deletion of
3046 objects, and placing invalid pointers onto the internal operator result
3047 stack. BZ 6028, 6151 (Valery Podrezov)
3049 Increased the reference count threshold where a warning is emitted for large
3050 reference counts in order to eliminate unnecessary warnings on systems with
3051 large namespaces (especially 64-bit.) Increased the value from 0x400 to
3054 Due to universal disagreement as to the meaning of the 'c' in the calloc()
3055 function, the ACPI_MEM_CALLOCATE macro has been renamed to
3056 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
3057 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
3060 Code and Data Size: These are the sizes for the acpica.lib produced by the
3061 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
3062 driver or OSPM code. The debug version of the code includes the debug output
3063 trace mechanism and has a much larger code and data size. Note that these
3064 values will vary depending on the efficiency of the compiler and the
3065 compiler options used during generation.
3068 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
3069 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
3071 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3072 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
3075 2) iASL Compiler/Disassembler:
3077 Disassembler: implemented support for symbolic resource descriptor
3078 references. If a CreateXxxxField operator references a fixed offset within a
3079 resource descriptor, a name is assigned to the descriptor and the offset is
3080 translated to the appropriate resource tag and pathname. The addition of
3081 this support brings the disassembled code very close to the original ASL
3082 source code and helps eliminate run-time errors when the disassembled code
3083 is modified (and recompiled) in such a way as to invalidate the original
3086 Implemented support for a Descriptor Name as the last parameter to the ASL
3087 Register() macro. This parameter was inadvertently left out of the ACPI
3088 specification, and will be added for ACPI 3.0b.
3090 Fixed a problem where the use of the "_OSI" string (versus the full path
3091 "\_OSI") caused an internal compiler error. ("No back ptr to op")
3093 Fixed a problem with the error message that occurs when an invalid string is
3094 used for a _HID object (such as one with an embedded asterisk: "*PNP010A".)
3095 The correct message is now displayed.
3097 ----------------------------------------
3098 17 February 2006. Summary of changes for version 20060217:
3100 1) ACPI CA Core Subsystem:
3102 Implemented a change to the IndexField support to match the behavior of the
3103 Microsoft AML interpreter. The value written to the Index register is now a
3104 byte offset, no longer an index based upon the width of the Data register.
3105 This should fix IndexField problems seen on some machines where the Data
3106 register is not exactly one byte wide. The ACPI specification will be
3107 clarified on this point.
3109 Fixed a problem where several resource descriptor types could overrun the
3110 internal descriptor buffer due to size miscalculation: VendorShort,
3111 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
3112 affect all platforms.
3114 Fixed a problem where individual resource descriptors were misaligned within
3115 the internal buffer, causing alignment faults on IA64 platforms.
3117 Code and Data Size: These are the sizes for the acpica.lib produced by the
3118 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
3119 driver or OSPM code. The debug version of the code includes the debug output
3120 trace mechanism and has a much larger code and data size. Note that these
3121 values will vary depending on the efficiency of the compiler and the
3122 compiler options used during generation.
3125 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3126 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
3128 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
3129 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
3132 2) iASL Compiler/Disassembler:
3134 Implemented support for new reserved names: _WDG and _WED are Microsoft
3135 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
3136 defined method (Throttling Depth Limit.)
3138 Fixed a problem where a zero-length VendorShort or VendorLong resource
3139 descriptor was incorrectly emitted as a descriptor of length one.
3141 ----------------------------------------
3142 10 February 2006. Summary of changes for version 20060210:
3144 1) ACPI CA Core Subsystem:
3146 Removed a couple of extraneous ACPI_ERROR messages that appeared during
3147 normal execution. These became apparent after the conversion from
3150 Fixed a problem where the CreateField operator could hang if the BitIndex or
3151 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
3153 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
3154 failed with an exception. This also fixes a couple of related RefOf and
3155 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
3157 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead of
3158 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov, BZ
3161 Implemented a memory cleanup at the end of the execution of each iteration
3162 of an AML While() loop, preventing the accumulation of outstanding objects.
3163 (Valery Podrezov, BZ 5427)
3165 Eliminated a chunk of duplicate code in the object resolution code. (Valery
3168 Fixed several warnings during the 64-bit code generation.
3170 The AcpiSrc source code conversion tool now inserts one line of whitespace
3171 after an if() statement that is followed immediately by a comment, improving
3172 readability of the Linux code.
3174 Code and Data Size: The current and previous library sizes for the core
3175 subsystem are shown below. These are the code and data sizes for the
3176 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3177 values do not include any ACPI driver or OSPM code. The debug version of the
3178 code includes the debug output trace mechanism and has a much larger code
3179 and data size. Note that these values will vary depending on the efficiency
3180 of the compiler and the compiler options used during generation.
3183 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
3184 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
3186 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
3187 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
3190 2) iASL Compiler/Disassembler:
3192 Fixed a problem with the disassembly of a BankField operator with a complex
3193 expression for the BankValue parameter.
3195 ----------------------------------------
3196 27 January 2006. Summary of changes for version 20060127:
3198 1) ACPI CA Core Subsystem:
3200 Implemented support in the Resource Manager to allow unresolved namestring
3201 references within resource package objects for the _PRT method. This support
3202 is in addition to the previously implemented unresolved reference support
3203 within the AML parser. If the interpreter slack mode is enabled, these
3204 unresolved references will be passed through to the caller as a NULL package
3207 Implemented and deployed new macros and functions for error and warning
3208 messages across the subsystem. These macros are simpler and generate less
3209 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
3210 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
3211 macros remain defined to allow ACPI drivers time to migrate to the new
3214 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of the
3215 Acquire/Release Lock OSL interfaces.
3217 Fixed a problem where Alias ASL operators are sometimes not correctly
3218 resolved, in both the interpreter and the iASL compiler.
3220 Fixed several problems with the implementation of the ConcatenateResTemplate
3221 ASL operator. As per the ACPI specification, zero length buffers are now
3222 treated as a single EndTag. One-length buffers always cause a fatal
3223 exception. Non-zero length buffers that do not end with a full 2-byte EndTag
3224 cause a fatal exception.
3226 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
3227 interface. (With assistance from Thomas Renninger)
3229 Code and Data Size: The current and previous library sizes for the core
3230 subsystem are shown below. These are the code and data sizes for the
3231 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3232 values do not include any ACPI driver or OSPM code. The debug version of the
3233 code includes the debug output trace mechanism and has a much larger code
3234 and data size. Note that these values will vary depending on the efficiency
3235 of the compiler and the compiler options used during generation.
3238 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
3239 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
3241 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
3242 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
3245 2) iASL Compiler/Disassembler:
3247 Fixed an internal error that was generated for any forward references to ASL
3250 ----------------------------------------
3251 13 January 2006. Summary of changes for version 20060113:
3253 1) ACPI CA Core Subsystem:
3255 Added 2006 copyright to all module headers and signons. This affects
3256 virtually every file in the ACPICA core subsystem, iASL compiler, and the
3259 Enhanced the ACPICA error reporting in order to simplify user migration to
3260 the non-debug version of ACPICA. Replaced all instances of the
3261 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN debug
3262 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
3263 respectively. This preserves all error and warning messages in the non-debug
3264 version of the ACPICA code (this has been referred to as the "debug lite"
3265 option.) Over 200 cases were converted to create a total of over 380
3266 error/warning messages across the ACPICA code. This increases the code and
3267 data size of the default non-debug version of the code somewhat (about 13K),
3268 but all error/warning reporting may be disabled if desired (and code
3269 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
3270 configuration option. The size of the debug version of ACPICA remains about
3273 Fixed a memory leak within the AML Debugger "Set" command. One object was
3274 not properly deleted for every successful invocation of the command.
3276 Code and Data Size: The current and previous library sizes for the core
3277 subsystem are shown below. These are the code and data sizes for the
3278 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3279 values do not include any ACPI driver or OSPM code. The debug version of the
3280 code includes the debug output trace mechanism and has a much larger code
3281 and data size. Note that these values will vary depending on the efficiency
3282 of the compiler and the compiler options used during generation.
3285 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
3286 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
3288 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
3289 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
3292 2) iASL Compiler/Disassembler:
3294 The compiler now officially supports the ACPI 3.0a specification that was
3295 released on December 30, 2005. (Specification is available at www.acpi.info)
3297 ----------------------------------------
3298 16 December 2005. Summary of changes for version 20051216:
3300 1) ACPI CA Core Subsystem:
3302 Implemented optional support to allow unresolved names within ASL Package
3303 objects. A null object is inserted in the package when a named reference
3304 cannot be located in the current namespace. Enabled via the interpreter
3305 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on machines
3306 that contain such code.
3308 Implemented an optimization to the initialization sequence that can improve
3309 boot time. During ACPI device initialization, the _STA method is now run if
3310 and only if the _INI method exists. The _STA method is used to determine if
3311 the device is present; An _INI can only be run if _STA returns present, but
3312 it is a waste of time to run the _STA method if the _INI does not exist.
3313 (Prototype and assistance from Dong Wei)
3315 Implemented use of the C99 uintptr_t for the pointer casting macros if it is
3316 available in the current compiler. Otherwise, the default (void *) cast is
3319 Fixed some possible memory leaks found within the execution path of the
3320 Break, Continue, If, and CreateField operators. (Valery Podrezov)
3322 Fixed a problem introduced in the 20051202 release where an exception is
3323 generated during method execution if a control method attempts to declare
3326 Moved resource descriptor string constants that are used by both the AML
3327 disassembler and AML debugger to the common utilities directory so that
3328 these components are independent.
3330 Implemented support in the AcpiExec utility (-e switch) to globally ignore
3331 exceptions during control method execution (method is not aborted.)
3333 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
3336 Code and Data Size: The current and previous library sizes for the core
3337 subsystem are shown below. These are the code and data sizes for the
3338 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3339 values do not include any ACPI driver or OSPM code. The debug version of the
3340 code includes the debug output trace mechanism and has a much larger code
3341 and data size. Note that these values will vary depending on the efficiency
3342 of the compiler and the compiler options used during generation.
3345 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3346 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3348 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
3349 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
3352 2) iASL Compiler/Disassembler:
3354 Fixed a problem where a CPU stack overflow fault could occur if a recursive
3355 method call was made from within a Return statement.
3357 ----------------------------------------
3358 02 December 2005. Summary of changes for version 20051202:
3360 1) ACPI CA Core Subsystem:
3362 Modified the parsing of control methods to no longer create namespace
3363 objects during the first pass of the parse. Objects are now created only
3364 during the execute phase, at the moment the namespace creation operator is
3365 encountered in the AML (Name, OperationRegion, CreateByteField, etc.) This
3366 should eliminate ALREADY_EXISTS exceptions seen on some machines where
3367 reentrant control methods are protected by an AML mutex. The mutex will now
3368 correctly block multiple threads from attempting to create the same object
3371 Increased the number of available Owner Ids for namespace object tracking
3372 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen on
3373 some machines with a large number of ACPI tables (either static or dynamic).
3375 Fixed a problem with the AcpiExec utility where a fault could occur when the
3376 -b switch (batch mode) is used.
3378 Enhanced the namespace dump routine to output the owner ID for each
3381 Code and Data Size: The current and previous library sizes for the core
3382 subsystem are shown below. These are the code and data sizes for the
3383 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3384 values do not include any ACPI driver or OSPM code. The debug version of the
3385 code includes the debug output trace mechanism and has a much larger code
3386 and data size. Note that these values will vary depending on the efficiency
3387 of the compiler and the compiler options used during generation.
3390 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3391 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3393 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3394 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
3397 2) iASL Compiler/Disassembler:
3399 Fixed a parse error during compilation of certain Switch/Case constructs. To
3400 simplify the parse, the grammar now allows for multiple Default statements
3401 and this error is now detected and flagged during the analysis phase.
3403 Disassembler: The disassembly now includes the contents of the original
3404 table header within a comment at the start of the file. This includes the
3405 name and version of the original ASL compiler.
3407 ----------------------------------------
3408 17 November 2005. Summary of changes for version 20051117:
3410 1) ACPI CA Core Subsystem:
3412 Fixed a problem in the AML parser where the method thread count could be
3413 decremented below zero if any errors occurred during the method parse phase.
3414 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some machines.
3415 This also fixed a related regression with the mechanism that detects and
3416 corrects methods that cannot properly handle reentrancy (related to the
3417 deployment of the new OwnerId mechanism.)
3419 Eliminated the pre-parsing of control methods (to detect errors) during
3420 table load. Related to the problem above, this was causing unwind issues if
3421 any errors occurred during the parse, and it seemed to be overkill. A table
3422 load should not be aborted if there are problems with any single control
3423 method, thus rendering this feature rather pointless.
3425 Fixed a problem with the new table-driven resource manager where an internal
3426 buffer overflow could occur for small resource templates.
3428 Implemented a new external interface, AcpiGetVendorResource. This interface
3429 will find and return a vendor-defined resource descriptor within a _CRS or
3430 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn Helgaas.
3432 Removed the length limit (200) on string objects as per the upcoming ACPI
3433 3.0A specification. This affects the following areas of the interpreter: 1)
3434 any implicit conversion of a Buffer to a String, 2) a String object result
3435 of the ASL Concatentate operator, 3) the String object result of the ASL
3438 Fixed a problem in the Windows OS interface layer (OSL) where a WAIT_FOREVER
3439 on a semaphore object would incorrectly timeout. This allows the
3440 multithreading features of the AcpiExec utility to work properly under
3443 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
3444 the recently added file named "utresrc.c".
3446 Code and Data Size: The current and previous library sizes for the core
3447 subsystem are shown below. These are the code and data sizes for the
3448 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3449 values do not include any ACPI driver or OSPM code. The debug version of the
3450 code includes the debug output trace mechanism and has a much larger code
3451 and data size. Note that these values will vary depending on the efficiency
3452 of the compiler and the compiler options used during generation.
3455 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3456 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3458 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
3459 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3462 2) iASL Compiler/Disassembler:
3464 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
3465 specification. For the iASL compiler, this means that string literals within
3466 the source ASL can be of any length.
3468 Enhanced the listing output to dump the AML code for resource descriptors
3469 immediately after the ASL code for each descriptor, instead of in a block at
3470 the end of the entire resource template.
3472 Enhanced the compiler debug output to dump the entire original parse tree
3473 constructed during the parse phase, before any transforms are applied to the
3474 tree. The transformed tree is dumped also.
3476 ----------------------------------------
3477 02 November 2005. Summary of changes for version 20051102:
3479 1) ACPI CA Core Subsystem:
3481 Modified the subsystem initialization sequence to improve GPE support. The
3482 GPE initialization has been split into two parts in order to defer execution
3483 of the _PRW methods (Power Resources for Wake) until after the hardware is
3484 fully initialized and the SCI handler is installed. This allows the _PRW
3485 methods to access fields protected by the Global Lock. This will fix systems
3486 where a NO_GLOBAL_LOCK exception has been seen during initialization.
3488 Converted the ACPI internal object disassemble and display code within the
3489 AML debugger to fully table-driven operation, reducing code size and
3490 increasing maintainability.
3492 Fixed a regression with the ConcatenateResTemplate() ASL operator introduced
3493 in the 20051021 release.
3495 Implemented support for "local" internal ACPI object types within the
3496 debugger "Object" command and the AcpiWalkNamespace external interfaces.
3497 These local types include RegionFields, BankFields, IndexFields, Alias, and
3500 Moved common AML resource handling code into a new file, "utresrc.c". This
3501 code is shared by both the Resource Manager and the AML Debugger.
3503 Code and Data Size: The current and previous library sizes for the core
3504 subsystem are shown below. These are the code and data sizes for the
3505 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3506 values do not include any ACPI driver or OSPM code. The debug version of the
3507 code includes the debug output trace mechanism and has a much larger code
3508 and data size. Note that these values will vary depending on the efficiency
3509 of the compiler and the compiler options used during generation.
3512 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3513 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3515 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
3516 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
3519 2) iASL Compiler/Disassembler:
3521 Fixed a problem with very large initializer lists (more than 4000 elements)
3522 for both Buffer and Package objects where the parse stack could overflow.
3524 Enhanced the pre-compile source code scan for non-ASCII characters to ignore
3525 characters within comment fields. The scan is now always performed and is no
3526 longer optional, detecting invalid characters within a source file
3527 immediately rather than during the parse phase or later.
3529 Enhanced the ASL grammar definition to force early reductions on all list-
3530 style grammar elements so that the overall parse stack usage is greatly
3531 reduced. This should improve performance and reduce the possibility of parse
3534 Eliminated all reduce/reduce conflicts in the iASL parser generation. Also,
3535 with the addition of a %expected statement, the compiler generates from
3536 source with no warnings.
3538 Fixed a possible segment fault in the disassembler if the input filename
3539 does not contain a "dot" extension (Thomas Renninger).
3541 ----------------------------------------
3542 21 October 2005. Summary of changes for version 20051021:
3544 1) ACPI CA Core Subsystem:
3546 Implemented support for the EM64T and other x86-64 processors. This
3547 essentially entails recognizing that these processors support non-aligned
3548 memory transfers. Previously, all 64-bit processors were assumed to lack
3549 hardware support for non-aligned transfers.
3551 Completed conversion of the Resource Manager to nearly full table-driven
3552 operation. Specifically, the resource conversion code (convert AML to
3553 internal format and the reverse) and the debug code to dump internal
3554 resource descriptors are fully table-driven, reducing code and data size and
3555 improving maintainability.
3557 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag word
3558 on 64-bit processors instead of a fixed 32-bit word. (With assistance from
3559 Alexey Starikovskiy)
3561 Implemented support within the resource conversion code for the Type-
3562 Specific byte within the various ACPI 3.0 *WordSpace macros.
3564 Fixed some issues within the resource conversion code for the type-specific
3565 flags for both Memory and I/O address resource descriptors. For Memory,
3566 implemented support for the MTP and TTP flags. For I/O, split the TRS and
3567 TTP flags into two separate fields.
3569 Code and Data Size: The current and previous library sizes for the core
3570 subsystem are shown below. These are the code and data sizes for the
3571 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3572 values do not include any ACPI driver or OSPM code. The debug version of the
3573 code includes the debug output trace mechanism and has a much larger code
3574 and data size. Note that these values will vary depending on the efficiency
3575 of the compiler and the compiler options used during generation.
3578 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3579 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3581 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3582 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3586 2) iASL Compiler/Disassembler:
3588 Relaxed a compiler restriction that disallowed a ResourceIndex byte if the
3589 corresponding ResourceSource string was not also present in a resource
3590 descriptor declaration. This restriction caused problems with existing
3591 AML/ASL code that includes the Index byte without the string. When such AML
3592 was disassembled, it could not be compiled without modification. Further,
3593 the modified code created a resource template with a different size than the
3594 original, breaking code that used fixed offsets into the resource template
3597 Removed a recent feature of the disassembler to ignore a lone ResourceIndex
3598 byte. This byte is now emitted if present so that the exact AML can be
3599 reproduced when the disassembled code is recompiled.
3601 Improved comments and text alignment for the resource descriptor code
3602 emitted by the disassembler.
3604 Implemented disassembler support for the ACPI 3.0 AccessSize field within a
3605 Register() resource descriptor.
3607 ----------------------------------------
3608 30 September 2005. Summary of changes for version 20050930:
3610 1) ACPI CA Core Subsystem:
3612 Completed a major overhaul of the Resource Manager code - specifically,
3613 optimizations in the area of the AML/internal resource conversion code. The
3614 code has been optimized to simplify and eliminate duplicated code, CPU stack
3615 use has been decreased by optimizing function parameters and local
3616 variables, and naming conventions across the manager have been standardized
3617 for clarity and ease of maintenance (this includes function, parameter,
3618 variable, and struct/typedef names.) The update may force changes in some
3619 driver code, depending on how resources are handled by the host OS.
3621 All Resource Manager dispatch and information tables have been moved to a
3622 single location for clarity and ease of maintenance. One new file was
3623 created, named "rsinfo.c".
3625 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
3626 guarantee that the argument is not evaluated twice, making them less prone
3627 to macro side-effects. However, since there exists the possibility of
3628 additional stack use if a particular compiler cannot optimize them (such as
3629 in the debug generation case), the original macros are optionally available.
3630 Note that some invocations of the return_VALUE macro may now cause size
3631 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided to
3632 eliminate these. (From Randy Dunlap)
3634 Implemented a new mechanism to enable debug tracing for individual control
3635 methods. A new external interface, AcpiDebugTrace, is provided to enable
3636 this mechanism. The intent is to allow the host OS to easily enable and
3637 disable tracing for problematic control methods. This interface can be
3638 easily exposed to a user or debugger interface if desired. See the file
3639 psxface.c for details.
3641 AcpiUtCallocate will now return a valid pointer if a length of zero is
3642 specified - a length of one is used and a warning is issued. This matches
3643 the behavior of AcpiUtAllocate.
3645 Code and Data Size: The current and previous library sizes for the core
3646 subsystem are shown below. These are the code and data sizes for the
3647 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3648 values do not include any ACPI driver or OSPM code. The debug version of the
3649 code includes the debug output trace mechanism and has a much larger code
3650 and data size. Note that these values will vary depending on the efficiency
3651 of the compiler and the compiler options used during generation.
3654 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3655 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3657 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3658 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3661 2) iASL Compiler/Disassembler:
3663 A remark is issued if the effective compile-time length of a package or
3664 buffer is zero. Previously, this was a warning.
3666 ----------------------------------------
3667 16 September 2005. Summary of changes for version 20050916:
3669 1) ACPI CA Core Subsystem:
3671 Fixed a problem within the Resource Manager where support for the Generic
3672 Register descriptor was not fully implemented. This descriptor is now fully
3673 recognized, parsed, disassembled, and displayed.
3675 Completely restructured the Resource Manager code to utilize table-driven
3676 dispatch and lookup, eliminating many of the large switch() statements. This
3677 reduces overall subsystem code size and code complexity. Affects the
3678 resource parsing and construction, disassembly, and debug dump output.
3680 Cleaned up and restructured the debug dump output for all resource
3681 descriptors. Improved readability of the output and reduced code size.
3683 Fixed a problem where changes to internal data structures caused the
3684 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
3686 Code and Data Size: The current and previous library sizes for the core
3687 subsystem are shown below. These are the code and data sizes for the
3688 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3689 values do not include any ACPI driver or OSPM code. The debug version of the
3690 code includes the debug output trace mechanism and has a much larger code
3691 and data size. Note that these values will vary depending on the efficiency
3692 of the compiler and the compiler options used during generation.
3695 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3696 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3698 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3699 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3702 2) iASL Compiler/Disassembler:
3704 Updated the disassembler to automatically insert an EndDependentFn() macro
3705 into the ASL stream if this macro is missing in the original AML code,
3706 simplifying compilation of the resulting ASL module.
3708 Fixed a problem in the disassembler where a disassembled ResourceSource
3709 string (within a large resource descriptor) was not surrounded by quotes and
3710 not followed by a comma, causing errors when the resulting ASL module was
3711 compiled. Also, escape sequences within a ResourceSource string are now
3712 handled correctly (especially "\\")
3714 ----------------------------------------
3715 02 September 2005. Summary of changes for version 20050902:
3717 1) ACPI CA Core Subsystem:
3719 Fixed a problem with the internal Owner ID allocation and deallocation
3720 mechanisms for control method execution and recursive method invocation.
3721 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
3722 messages seen on some systems. Recursive method invocation depth is
3723 currently limited to 255. (Alexey Starikovskiy)
3725 Completely eliminated all vestiges of support for the "module-level
3726 executable code" until this support is fully implemented and debugged. This
3727 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
3728 some systems that invoke this support.
3730 Fixed a problem within the resource manager code where the transaction flags
3731 for a 64-bit address descriptor were handled incorrectly in the type-
3734 Consolidated duplicate code within the address descriptor resource manager
3735 code, reducing overall subsystem code size.
3737 Fixed a fault when using the AML debugger "disassemble" command to
3738 disassemble individual control methods.
3740 Removed references to the "release_current" directory within the Unix
3743 Code and Data Size: The current and previous core subsystem library sizes
3744 are shown below. These are the code and data sizes for the acpica.lib
3745 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
3746 include any ACPI driver or OSPM code. The debug version of the code includes
3747 the debug output trace mechanism and has a much larger code and data size.
3748 Note that these values will vary depending on the efficiency of the compiler
3749 and the compiler options used during generation.
3752 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3753 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3755 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3756 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3759 2) iASL Compiler/Disassembler:
3761 Implemented an error check for illegal duplicate values in the interrupt and
3762 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
3765 Implemented error checking for the Irq() and IrqNoFlags() macros to detect
3766 too many values in the interrupt list (16 max) and invalid values in the
3769 The maximum length string literal within an ASL file is now restricted to
3770 200 characters as per the ACPI specification.
3772 Fixed a fault when using the -ln option (generate namespace listing).
3774 Implemented an error check to determine if a DescriptorName within a
3775 resource descriptor has already been used within the current scope.
3777 ----------------------------------------
3778 15 August 2005. Summary of changes for version 20050815:
3780 1) ACPI CA Core Subsystem:
3782 Implemented a full bytewise compare to determine if a table load request is
3783 attempting to load a duplicate table. The compare is performed if the table
3784 signatures and table lengths match. This will allow different tables with
3785 the same OEM Table ID and revision to be loaded - probably against the ACPI
3786 specification, but discovered in the field nonetheless.
3788 Added the changes.txt logfile to each of the zipped release packages.
3790 Code and Data Size: Current and previous core subsystem library sizes are
3791 shown below. These are the code and data sizes for the acpica.lib produced
3792 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3793 any ACPI driver or OSPM code. The debug version of the code includes the
3794 debug output trace mechanism and has a much larger code and data size. Note
3795 that these values will vary depending on the efficiency of the compiler and
3796 the compiler options used during generation.
3799 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3800 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3802 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3803 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3806 2) iASL Compiler/Disassembler:
3808 Fixed a problem where incorrect AML code could be generated for Package
3809 objects if optimization is disabled (via the -oa switch).
3811 Fixed a problem with where incorrect AML code is generated for variable-
3812 length packages when the package length is not specified and the number of
3813 initializer values is greater than 255.
3816 ----------------------------------------
3817 29 July 2005. Summary of changes for version 20050729:
3819 1) ACPI CA Core Subsystem:
3821 Implemented support to ignore an attempt to install/load a particular ACPI
3822 table more than once. Apparently there exists BIOS code that repeatedly
3823 attempts to load the same SSDT upon certain events. With assistance from
3824 Venkatesh Pallipadi.
3826 Restructured the main interface to the AML parser in order to correctly
3827 handle all exceptional conditions. This will prevent leakage of the OwnerId
3828 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
3829 machines. With assistance from Alexey Starikovskiy.
3831 Support for "module level code" has been disabled in this version due to a
3832 number of issues that have appeared on various machines. The support can be
3833 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
3834 compilation. When the issues are fully resolved, the code will be enabled by
3837 Modified the internal functions for debug print support to define the
3838 FunctionName parameter as a (const char *) for compatibility with compiler
3839 built-in macros such as __FUNCTION__, etc.
3841 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
3843 Implemented support to display an object count summary for the AML Debugger
3844 commands Object and Methods.
3846 Code and Data Size: Current and previous core subsystem library sizes are
3847 shown below. These are the code and data sizes for the acpica.lib produced
3848 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3849 any ACPI driver or OSPM code. The debug version of the code includes the
3850 debug output trace mechanism and has a much larger code and data size. Note
3851 that these values will vary depending on the efficiency of the compiler and
3852 the compiler options used during generation.
3855 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3856 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3858 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3859 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3862 2) iASL Compiler/Disassembler:
3864 Fixed a regression that appeared in the 20050708 version of the compiler
3865 where an error message was inadvertently emitted for invocations of the _OSI
3866 reserved control method.
3868 ----------------------------------------
3869 08 July 2005. Summary of changes for version 20050708:
3871 1) ACPI CA Core Subsystem:
3873 The use of the CPU stack in the debug version of the subsystem has been
3874 considerably reduced. Previously, a debug structure was declared in every
3875 function that used the debug macros. This structure has been removed in
3876 favor of declaring the individual elements as parameters to the debug
3877 functions. This reduces the cumulative stack use during nested execution of
3878 ACPI function calls at the cost of a small increase in the code size of the
3879 debug version of the subsystem. With assistance from Alexey Starikovskiy and
3882 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
3883 headers to define a macro that will return the current function name at
3884 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by
3885 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
3886 compiler-dependent header, the function name is saved on the CPU stack (one
3887 pointer per function.) This mechanism is used because apparently there
3888 exists no standard ANSI-C defined macro that that returns the function name.
3890 Redesigned and reimplemented the "Owner ID" mechanism used to track
3891 namespace objects created/deleted by ACPI tables and control method
3892 execution. A bitmap is now used to allocate and free the IDs, thus solving
3893 the wraparound problem present in the previous implementation. The size of
3894 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
3897 Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield
3898 flag definitions within the headers for the predefined ACPI tables. These
3899 have been replaced by UINT8_BIT in order to increase the code portability of
3900 the subsystem. If the use of UINT8 remains a problem, we may be forced to
3901 eliminate bitfields entirely because of a lack of portability.
3903 Enhanced the performance of the AcpiUtUpdateObjectReference procedure. This
3904 is a frequently used function and this improvement increases the performance
3905 of the entire subsystem (Alexey Starikovskiy).
3907 Fixed several possible memory leaks and the inverse - premature object
3908 deletion (Alexey Starikovskiy).
3910 Code and Data Size: Current and previous core subsystem library sizes are
3911 shown below. These are the code and data sizes for the acpica.lib produced
3912 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3913 any ACPI driver or OSPM code. The debug version of the code includes the
3914 debug output trace mechanism and has a much larger code and data size. Note
3915 that these values will vary depending on the efficiency of the compiler and
3916 the compiler options used during generation.
3919 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3920 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3922 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3923 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3925 ----------------------------------------
3926 24 June 2005. Summary of changes for version 20050624:
3928 1) ACPI CA Core Subsystem:
3930 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
3931 the host-defined cache object. This allows the OSL implementation to define
3932 and type this object in any manner desired, simplifying the OSL
3933 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
3934 Linux, and should be defined in the OS-specific header file for other
3935 operating systems as required.
3937 Changed the interface to AcpiOsAcquireObject to directly return the
3938 requested object as the function return (instead of ACPI_STATUS.) This
3939 change was made for performance reasons, since this is the purpose of the
3940 interface in the first place. AcpiOsAcquireObject is now similar to the
3941 AcpiOsAllocate interface.
3943 Implemented a new AML debugger command named Businfo. This command displays
3944 information about all devices that have an associate _PRT object. The _ADR,
3945 _HID, _UID, and _CID are displayed for these devices.
3947 Modified the initialization sequence in AcpiInitializeSubsystem to call the
3948 OSL interface AcpiOslInitialize first, before any local initialization. This
3949 change was required because the global initialization now calls OSL
3952 Enhanced the Dump command to display the entire contents of Package objects
3953 (including all sub-objects and their values.)
3955 Restructured the code base to split some files because of size and/or
3956 because the code logically belonged in a separate file. New files are listed
3957 below. All makefiles and project files included in the ACPI CA release have
3959 utilities/utcache.c /* Local cache interfaces */
3960 utilities/utmutex.c /* Local mutex support */
3961 utilities/utstate.c /* State object support */
3962 interpreter/parser/psloop.c /* Main AML parse loop */
3964 Code and Data Size: Current and previous core subsystem library sizes are
3965 shown below. These are the code and data sizes for the acpica.lib produced
3966 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3967 any ACPI driver or OSPM code. The debug version of the code includes the
3968 debug output trace mechanism and has a much larger code and data size. Note
3969 that these values will vary depending on the efficiency of the compiler and
3970 the compiler options used during generation.
3973 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
3974 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
3976 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3977 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3980 2) iASL Compiler/Disassembler:
3982 Fixed a regression introduced in version 20050513 where the use of a Package
3983 object within a Case() statement caused a compile time exception. The
3984 original behavior has been restored (a Match() operator is emitted.)
3986 ----------------------------------------
3987 17 June 2005. Summary of changes for version 20050617:
3989 1) ACPI CA Core Subsystem:
3991 Moved the object cache operations into the OS interface layer (OSL) to allow
3992 the host OS to handle these operations if desired (for example, the Linux
3993 OSL will invoke the slab allocator). This support is optional; the compile
3994 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache
3995 code in the ACPI CA core. The new OSL interfaces are shown below. See
3996 utalloc.c for an example implementation, and acpiosxf.h for the exact
3997 interface definitions. With assistance from Alexey Starikovskiy.
4004 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to return
4005 and restore a flags parameter. This fits better with many OS lock models.
4006 Note: the current execution state (interrupt handler or not) is no longer
4007 passed to these interfaces. If necessary, the OSL must determine this state
4008 by itself, a simple and fast operation. With assistance from Alexey
4011 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
4012 present if the revision of the RSDP was 2 or greater. According to the ACPI
4013 specification, the XSDT is optional in all cases, and the table manager
4014 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
4015 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain
4018 Fixed an interpreter problem with the Mid() operator in the case of an input
4019 string where the resulting output string is of zero length. It now correctly
4020 returns a valid, null terminated string object instead of a string object
4021 with a null pointer.
4023 Fixed a problem with the control method argument handling to allow a store
4024 to an Arg object that already contains an object of type Device. The Device
4025 object is now correctly overwritten. Previously, an error was returned.
4028 Enhanced the debugger Find command to emit object values in addition to the
4029 found object pathnames. The output format is the same as the dump namespace
4032 Enhanced the debugger Set command. It now has the ability to set the value
4033 of any Named integer object in the namespace (Previously, only method locals
4034 and args could be set.)
4036 Code and Data Size: Current and previous core subsystem library sizes are
4037 shown below. These are the code and data sizes for the acpica.lib produced
4038 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4039 any ACPI driver or OSPM code. The debug version of the code includes the
4040 debug output trace mechanism and has a much larger code and data size. Note
4041 that these values will vary depending on the efficiency of the compiler and
4042 the compiler options used during generation.
4045 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
4046 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
4048 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
4049 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
4052 2) iASL Compiler/Disassembler:
4054 Fixed a regression in the disassembler where if/else/while constructs were
4055 output incorrectly. This problem was introduced in the previous release
4056 (20050526). This problem also affected the single-step disassembly in the
4059 Fixed a problem where compiling the reserved _OSI method would randomly (but
4060 rarely) produce compile errors.
4062 Enhanced the disassembler to emit compilable code in the face of incorrect
4063 AML resource descriptors. If the optional ResourceSourceIndex is present,
4064 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
4065 disassembly. Otherwise, the resulting code cannot be compiled without
4068 ----------------------------------------
4069 26 May 2005. Summary of changes for version 20050526:
4071 1) ACPI CA Core Subsystem:
4073 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
4074 the module level (not within a control method.) These opcodes are executed
4075 exactly once at the time the table is loaded. This type of code was legal up
4076 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA in
4077 order to provide backwards compatibility with earlier BIOS implementations.
4078 This eliminates the "Encountered executable code at module level" warning
4079 that was previously generated upon detection of such code.
4081 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
4082 inadvertently be generated during the lookup of namespace objects in the
4083 second pass parse of ACPI tables and control methods. It appears that this
4084 problem could occur during the resolution of forward references to namespace
4087 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
4088 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
4089 allows the deadlock detection debug code to be compiled out in the normal
4090 case, improving mutex performance (and overall subsystem performance)
4093 Implemented a handful of miscellaneous fixes for possible memory leaks on
4094 error conditions and error handling control paths. These fixes were
4095 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
4097 Added a check for a null RSDT pointer in AcpiGetFirmwareTable (tbxfroot.c)
4098 to prevent a fault in this error case.
4100 Code and Data Size: Current and previous core subsystem library sizes are
4101 shown below. These are the code and data sizes for the acpica.lib produced
4102 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4103 any ACPI driver or OSPM code. The debug version of the code includes the
4104 debug output trace mechanism and has a much larger code and data size. Note
4105 that these values will vary depending on the efficiency of the compiler and
4106 the compiler options used during generation.
4109 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4110 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4112 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
4113 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
4116 2) iASL Compiler/Disassembler:
4118 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
4119 the module level (not within a control method.) These operators will be
4120 executed once at the time the table is loaded. This type of code was legal
4121 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
4122 compiler in order to provide backwards compatibility with earlier BIOS ASL
4125 The ACPI integer width (specified via the table revision ID or the -r
4126 override, 32 or 64 bits) is now used internally during compile-time constant
4127 folding to ensure that constants are truncated to 32 bits if necessary.
4128 Previously, the revision ID value was only emitted in the AML table header.
4130 An error message is now generated for the Mutex and Method operators if the
4131 SyncLevel parameter is outside the legal range of 0 through 15.
4133 Fixed a problem with the Method operator ParameterTypes list handling (ACPI
4134 3.0). Previously, more than 2 types or 2 arguments generated a syntax error.
4135 The actual underlying implementation of method argument typechecking is
4136 still under development, however.
4138 ----------------------------------------
4139 13 May 2005. Summary of changes for version 20050513:
4141 1) ACPI CA Core Subsystem:
4143 Implemented support for PCI Express root bridges -- added support for device
4144 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
4146 The interpreter now automatically truncates incoming 64-bit constants to 32
4147 bits if currently executing out of a 32-bit ACPI table (Revision < 2). This
4148 also affects the iASL compiler constant folding. (Note: as per below, the
4149 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
4151 Fixed a problem where string and buffer objects with "static" pointers
4152 (pointers to initialization data within an ACPI table) were not handled
4153 consistently. The internal object copy operation now always copies the data
4154 to a newly allocated buffer, regardless of whether the source object is
4157 Fixed a problem with the FromBCD operator where an implicit result
4158 conversion was improperly performed while storing the result to the target
4159 operand. Since this is an "explicit conversion" operator, the implicit
4160 conversion should never be performed on the output.
4162 Fixed a problem with the CopyObject operator where a copy to an existing
4163 named object did not always completely overwrite the existing object stored
4164 at name. Specifically, a buffer-to-buffer copy did not delete the existing
4167 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces and
4168 structs for consistency.
4170 Code and Data Size: Current and previous core subsystem library sizes are
4171 shown below. These are the code and data sizes for the acpica.lib produced
4172 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4173 any ACPI driver or OSPM code. The debug version of the code includes the
4174 debug output trace mechanism and has a much larger code and data size. Note
4175 that these values will vary depending on the efficiency of the compiler and
4176 the compiler options used during generation.
4179 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4180 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4181 Current Release: (Same sizes)
4182 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4183 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4186 2) iASL Compiler/Disassembler:
4188 The compiler now emits a warning if an attempt is made to generate a 64-bit
4189 integer constant from within a 32-bit ACPI table (Revision < 2). The integer
4190 is truncated to 32 bits.
4192 Fixed a problem with large package objects: if the static length of the
4193 package is greater than 255, the "variable length package" opcode is
4194 emitted. Previously, this caused an error. This requires an update to the
4195 ACPI spec, since it currently (incorrectly) states that packages larger than
4196 255 elements are not allowed.
4198 The disassembler now correctly handles variable length packages and packages
4199 larger than 255 elements.
4201 ----------------------------------------
4202 08 April 2005. Summary of changes for version 20050408:
4204 1) ACPI CA Core Subsystem:
4206 Fixed three cases in the interpreter where an "index" argument to an ASL
4207 function was still (internally) 32 bits instead of the required 64 bits.
4208 This was the Index argument to the Index, Mid, and Match operators.
4210 The "strupr" function is now permanently local (AcpiUtStrupr), since this is
4211 not a POSIX-defined function and not present in most kernel-level C
4212 libraries. All references to the C library strupr function have been removed
4215 Completed the deployment of static functions/prototypes. All prototypes with
4216 the static attribute have been moved from the headers to the owning C file.
4218 Implemented an extract option (-e) for the AcpiBin utility (AML binary
4219 utility). This option allows the utility to extract individual ACPI tables
4220 from the output of AcpiDmp. It provides the same functionality of the
4221 acpixtract.pl perl script without the worry of setting the correct perl
4222 options. AcpiBin runs on Windows and has not yet been generated/validated in
4223 the Linux/Unix environment (but should be soon).
4225 Updated and fixed the table dump option for AcpiBin (-d). This option
4226 converts a single ACPI table to a hex/ascii file, similar to the output of
4229 Code and Data Size: Current and previous core subsystem library sizes are
4230 shown below. These are the code and data sizes for the acpica.lib produced
4231 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4232 any ACPI driver or OSPM code. The debug version of the code includes the
4233 debug output trace mechanism and has a much larger code and data size. Note
4234 that these values will vary depending on the efficiency of the compiler and
4235 the compiler options used during generation.
4238 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
4239 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
4241 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
4242 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
4245 2) iASL Compiler/Disassembler:
4247 Disassembler fix: Added a check to ensure that the table length found in the
4248 ACPI table header within the input file is not longer than the actual input
4249 file size. This indicates some kind of file or table corruption.
4251 ----------------------------------------
4252 29 March 2005. Summary of changes for version 20050329:
4254 1) ACPI CA Core Subsystem:
4256 An error is now generated if an attempt is made to create a Buffer Field of
4257 length zero (A CreateField with a length operand of zero.)
4259 The interpreter now issues a warning whenever executable code at the module
4260 level is detected during ACPI table load. This will give some idea of the
4261 prevalence of this type of code.
4263 Implemented support for references to named objects (other than control
4264 methods) within package objects.
4266 Enhanced package object output for the debug object. Package objects are now
4267 completely dumped, showing all elements.
4269 Enhanced miscellaneous object output for the debug object. Any object can
4270 now be written to the debug object (for example, a device object can be
4271 written, and the type of the object will be displayed.)
4273 The "static" qualifier has been added to all local functions across both the
4274 core subsystem and the iASL compiler.
4276 The number of "long" lines (> 80 chars) within the source has been
4277 significantly reduced, by about 1/3.
4279 Cleaned up all header files to ensure that all CA/iASL functions are
4280 prototyped (even static functions) and the formatting is consistent.
4282 Two new header files have been added, acopcode.h and acnames.h.
4284 Removed several obsolete functions that were no longer used.
4286 Code and Data Size: Current and previous core subsystem library sizes are
4287 shown below. These are the code and data sizes for the acpica.lib produced
4288 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4289 any ACPI driver or OSPM code. The debug version of the code includes the
4290 debug output trace mechanism and has a much larger code and data size. Note
4291 that these values will vary depending on the efficiency of the compiler and
4292 the compiler options used during generation.
4295 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4296 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
4298 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
4299 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
4303 2) iASL Compiler/Disassembler:
4305 Fixed a problem with the resource descriptor generation/support. For the
4306 ResourceSourceIndex and the ResourceSource fields, both must be present, or
4307 both must be not present - can't have one without the other.
4309 The compiler now returns non-zero from the main procedure if any errors have
4310 occurred during the compilation.
4313 ----------------------------------------
4314 09 March 2005. Summary of changes for version 20050309:
4316 1) ACPI CA Core Subsystem:
4318 The string-to-buffer implicit conversion code has been modified again after
4319 a change to the ACPI specification. In order to match the behavior of the
4320 other major ACPI implementation, the target buffer is no longer truncated if
4321 the source string is smaller than an existing target buffer. This change
4322 requires an update to the ACPI spec, and should eliminate the recent
4323 AE_AML_BUFFER_LIMIT issues.
4325 The "implicit return" support was rewritten to a new algorithm that solves
4326 the general case. Rather than attempt to determine when a method is about to
4327 exit, the result of every ASL operator is saved momentarily until the very
4328 next ASL operator is executed. Therefore, no matter how the method exits,
4329 there will always be a saved implicit return value. This feature is only
4330 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should eliminate
4331 AE_AML_NO_RETURN_VALUE errors when enabled.
4333 Implemented implicit conversion support for the predicate (operand) of the
4334 If, Else, and While operators. String and Buffer arguments are automatically
4335 converted to Integers.
4337 Changed the string-to-integer conversion behavior to match the new ACPI
4338 errata: "If no integer object exists, a new integer is created. The ASCII
4339 string is interpreted as a hexadecimal constant. Each string character is
4340 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
4341 with the first character as the most significant digit, and ending with the
4342 first non-hexadecimal character or end-of-string." This means that the first
4343 non-hex character terminates the conversion and this is the code that was
4346 Fixed a problem where the ObjectType operator would fail (fault) when used
4347 on an Index of a Package which pointed to a null package element. The
4348 operator now properly returns zero (Uninitialized) in this case.
4350 Fixed a problem where the While operator used excessive memory by not
4351 properly popping the result stack during execution. There was no memory leak
4352 after execution, however. (Code provided by Valery Podrezov.)
4354 Fixed a problem where references to control methods within Package objects
4355 caused the method to be invoked, instead of producing a reference object
4356 pointing to the method.
4358 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree) to
4359 improve performance and reduce code size. (Code provided by Alexey
4362 Code and Data Size: Current and previous core subsystem library sizes are
4363 shown below. These are the code and data sizes for the acpica.lib produced
4364 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4365 any ACPI driver or OSPM code. The debug version of the code includes the
4366 debug output trace mechanism and has a much larger code and data size. Note
4367 that these values will vary depending on the efficiency of the compiler and
4368 the compiler options used during generation.
4371 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4372 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4374 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4375 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
4378 2) iASL Compiler/Disassembler:
4380 Fixed a problem with the Return operator with no arguments. Since the AML
4381 grammar for the byte encoding requires an operand for the Return opcode, the
4382 compiler now emits a Return(Zero) for this case. An ACPI specification
4383 update has been written for this case.
4385 For tables other than the DSDT, namepath optimization is automatically
4386 disabled. This is because SSDTs can be loaded anywhere in the namespace, the
4387 compiler has no knowledge of where, and thus cannot optimize namepaths.
4389 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
4390 inadvertently omitted from the ACPI specification, and will require an
4393 The source file scan for ASCII characters is now optional (-a). This change
4394 was made because some vendors place non-ascii characters within comments.
4395 However, the scan is simply a brute-force byte compare to ensure all
4396 characters in the file are in the range 0x00 to 0x7F.
4398 Fixed a problem with the CondRefOf operator where the compiler was
4399 inappropriately checking for the existence of the target. Since the point of
4400 the operator is to check for the existence of the target at run-time, the
4401 compiler no longer checks for the target existence.
4403 Fixed a problem where errors generated from the internal AML interpreter
4404 during constant folding were not handled properly, causing a fault.
4406 Fixed a problem with overly aggressive range checking for the Stall
4407 operator. The valid range (max 255) is now only checked if the operand is of
4408 type Integer. All other operand types cannot be statically checked.
4410 Fixed a problem where control method references within the RefOf, DeRefOf,
4411 and ObjectType operators were not treated properly. They are now treated as
4412 actual references, not method invocations.
4414 Fixed and enhanced the "list namespace" option (-ln). This option was broken
4415 a number of releases ago.
4417 Improved error handling for the Field, IndexField, and BankField operators.
4418 The compiler now cleanly reports and recovers from errors in the field
4419 component (FieldUnit) list.
4421 Fixed a disassembler problem where the optional ResourceDescriptor fields
4422 TRS and TTP were not always handled correctly.
4424 Disassembler - Comments in output now use "//" instead of "/*"
4426 ----------------------------------------
4427 28 February 2005. Summary of changes for version 20050228:
4429 1) ACPI CA Core Subsystem:
4431 Fixed a problem where the result of an Index() operator (an object
4432 reference) must increment the reference count on the target object for the
4433 life of the object reference.
4435 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
4436 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and WordSpace
4437 resource descriptors.
4439 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
4440 Space Descriptor" string, indicating interpreter support for the descriptors
4443 Implemented header support for the new ACPI 3.0 FADT flag bits.
4445 Implemented header support for the new ACPI 3.0 PCI Express bits for the PM1
4446 status/enable registers.
4448 Updated header support for the MADT processor local Apic struct and MADT
4449 platform interrupt source struct for new ACPI 3.0 fields.
4451 Implemented header support for the SRAT and SLIT ACPI tables.
4453 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack" flag
4456 Code and Data Size: Current and previous core subsystem library sizes are
4457 shown below. These are the code and data sizes for the acpica.lib produced
4458 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4459 any ACPI driver or OSPM code. The debug version of the code includes the
4460 debug output trace mechanism and has a much larger code and data size. Note
4461 that these values will vary depending on the efficiency of the compiler and
4462 the compiler options used during generation.
4465 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4466 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4468 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4469 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
4472 2) iASL Compiler/Disassembler:
4474 Fixed a problem with the internal 64-bit String-to-integer conversion with
4475 strings less than two characters long.
4477 Fixed a problem with constant folding where the result of the Index()
4478 operator can not be considered a constant. This means that Index() cannot be
4479 a type3 opcode and this will require an update to the ACPI specification.
4481 Disassembler: Implemented support for the TTP, MTP, and TRS resource
4482 descriptor fields. These fields were inadvertently ignored and not output in
4483 the disassembly of the resource descriptor.
4486 ----------------------------------------
4487 11 February 2005. Summary of changes for version 20050211:
4489 1) ACPI CA Core Subsystem:
4491 Implemented ACPI 3.0 support for implicit conversion within the Match()
4492 operator. MatchObjects can now be of type integer, buffer, or string instead
4493 of just type integer. Package elements are implicitly converted to the type
4494 of the MatchObject. This change aligns the behavior of Match() with the
4495 behavior of the other logical operators (LLess(), etc.) It also requires an
4496 errata change to the ACPI specification as this support was intended for
4497 ACPI 3.0, but was inadvertently omitted.
4499 Fixed a problem with the internal implicit "to buffer" conversion. Strings
4500 that are converted to buffers will cause buffer truncation if the string is
4501 smaller than the target buffer. Integers that are converted to buffers will
4502 not cause buffer truncation, only zero extension (both as per the ACPI
4503 spec.) The problem was introduced when code was added to truncate the
4504 buffer, but this should not be performed in all cases, only the string case.
4506 Fixed a problem with the Buffer and Package operators where the interpreter
4507 would get confused if two such operators were used as operands to an ASL
4508 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
4509 stack was not being popped after the execution of these operators, resulting
4510 in an AE_NO_RETURN_VALUE exception.
4512 Fixed a problem with constructs of the form Store(Index(...),...). The
4513 reference object returned from Index was inadvertently resolved to an actual
4514 value. This problem was introduced in version 20050114 when the behavior of
4515 Store() was modified to restrict the object types that can be used as the
4516 source operand (to match the ACPI specification.)
4518 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
4520 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
4522 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
4524 Code and Data Size: Current and previous core subsystem library sizes are
4525 shown below. These are the code and data sizes for the acpica.lib produced
4526 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4527 any ACPI driver or OSPM code. The debug version of the code includes the
4528 debug output trace mechanism and has a much larger code and data size. Note
4529 that these values will vary depending on the efficiency of the compiler and
4530 the compiler options used during generation.
4533 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4534 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4536 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
4537 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
4540 2) iASL Compiler/Disassembler:
4542 Fixed a code generation problem in the constant folding optimization code
4543 where incorrect code was generated if a constant was reduced to a buffer
4544 object (i.e., a reduced type 5 opcode.)
4546 Fixed a typechecking problem for the ToBuffer operator. Caused by an
4547 incorrect return type in the internal opcode information table.
4549 ----------------------------------------
4550 25 January 2005. Summary of changes for version 20050125:
4552 1) ACPI CA Core Subsystem:
4554 Fixed a recently introduced problem with the Global Lock where the
4555 underlying semaphore was not created. This problem was introduced in
4556 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
4557 Acquire() operation on _GL.
4559 The local object cache is now optional, and is disabled by default. Both
4560 AcpiExec and the iASL compiler enable the cache because they run in user
4561 mode and this enhances their performance. #define ACPI_ENABLE_OBJECT_CACHE
4562 to enable the local cache.
4564 Fixed an issue in the internal function AcpiUtEvaluateObject concerning the
4565 optional "implicit return" support where an error was returned if no return
4566 object was expected, but one was implicitly returned. AE_OK is now returned
4567 in this case and the implicitly returned object is deleted.
4568 AcpiUtEvaluateObject is only occasionally used, and only to execute reserved
4569 methods such as _STA and _INI where the return type is known up front.
4571 Fixed a few issues with the internal convert-to-integer code. It now returns
4572 an error if an attempt is made to convert a null string, a string of only
4573 blanks/tabs, or a zero-length buffer. This affects both implicit conversion
4574 and explicit conversion via the ToInteger() operator.
4576 The internal debug code in AcpiUtAcquireMutex has been commented out. It is
4577 not needed for normal operation and should increase the performance of the
4578 entire subsystem. The code remains in case it is needed for debug purposes
4581 The AcpiExec source and makefile are included in the Unix/Linux package for
4584 Code and Data Size: Current and previous core subsystem library sizes are
4585 shown below. These are the code and data sizes for the acpica.lib produced
4586 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4587 any ACPI driver or OSPM code. The debug version of the code includes the
4588 debug output trace mechanism and has a much larger code and data size. Note
4589 that these values will vary depending on the efficiency of the compiler and
4590 the compiler options used during generation.
4593 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4594 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4596 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4597 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4599 2) iASL Compiler/Disassembler:
4601 Switch/Case support: A warning is now issued if the type of the Switch value
4602 cannot be determined at compile time. For example, Switch(Arg0) will
4603 generate the warning, and the type is assumed to be an integer. As per the
4604 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate the
4607 Switch/Case support: Implemented support for buffer and string objects as
4608 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
4609 buffers and strings.
4611 Switch/Case support: The emitted code for the LEqual() comparisons now uses
4612 the switch value as the first operand, not the second. The case value is now
4613 the second operand, and this allows the case value to be implicitly
4614 converted to the type of the switch value, not the other way around.
4616 Switch/Case support: Temporary variables are now emitted immediately within
4617 the control method, not at the global level. This means that there are now
4618 36 temps available per-method, not 36 temps per-module as was the case with
4619 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
4621 ----------------------------------------
4622 14 January 2005. Summary of changes for version 20050114:
4624 Added 2005 copyright to all module headers. This affects every module in
4625 the core subsystem, iASL compiler, and the utilities.
4627 1) ACPI CA Core Subsystem:
4629 Fixed an issue with the String-to-Buffer conversion code where the string
4630 null terminator was not included in the buffer after conversion, but there
4631 is existing ASL that assumes the string null terminator is included. This is
4632 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
4633 introduced in the previous version when the code was updated to correctly
4634 set the converted buffer size as per the ACPI specification. The ACPI spec
4635 is ambiguous and will be updated to specify that the null terminator must be
4636 included in the converted buffer. This also affects the ToBuffer() ASL
4639 Fixed a problem with the Mid() ASL/AML operator where it did not work
4640 correctly on Buffer objects. Newly created sub-buffers were not being marked
4644 Fixed a problem in AcpiTbFindTable where incorrect string compares were
4645 performed on the OemId and OemTableId table header fields. These fields are
4646 not null terminated, so strncmp is now used instead of strcmp.
4648 Implemented a restriction on the Store() ASL/AML operator to align the
4649 behavior with the ACPI specification. Previously, any object could be used
4650 as the source operand. Now, the only objects that may be used are Integers,
4651 Buffers, Strings, Packages, Object References, and DDB Handles. If
4652 necessary, the original behavior can be restored by enabling the
4653 EnableInterpreterSlack flag.
4655 Enhanced the optional "implicit return" support to allow an implicit return
4656 value from methods that are invoked externally via the AcpiEvaluateObject
4657 interface. This enables implicit returns from the _STA and _INI methods,
4660 Changed the Revision() ASL/AML operator to return the current version of the
4661 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly returned
4662 the supported ACPI version (This is the function of the _REV method).
4664 Updated the _REV predefined method to return the currently supported version
4667 Implemented batch mode option for the AcpiExec utility (-b).
4669 Code and Data Size: Current and previous core subsystem library sizes are
4670 shown below. These are the code and data sizes for the acpica.lib produced
4671 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4672 any ACPI driver or OSPM code. The debug version of the code includes the
4673 debug output trace mechanism and has a much larger code and data size. Note
4674 that these values will vary depending on the efficiency of the compiler and
4675 the compiler options used during generation.
4678 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4679 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4681 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4682 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4684 ----------------------------------------
4685 10 December 2004. Summary of changes for version 20041210:
4687 ACPI 3.0 support is nearing completion in both the iASL compiler and the
4688 ACPI CA core subsystem.
4690 1) ACPI CA Core Subsystem:
4692 Fixed a problem in the ToDecimalString operator where the resulting string
4693 length was incorrectly calculated. The length is now calculated exactly,
4694 eliminating incorrect AE_STRING_LIMIT exceptions.
4696 Fixed a problem in the ToHexString operator to allow a maximum 200 character
4697 string to be produced.
4699 Fixed a problem in the internal string-to-buffer and buffer-to-buffer copy
4700 routine where the length of the resulting buffer was not truncated to the
4701 new size (if the target buffer already existed).
4703 Code and Data Size: Current and previous core subsystem library sizes are
4704 shown below. These are the code and data sizes for the acpica.lib produced
4705 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4706 any ACPI driver or OSPM code. The debug version of the code includes the
4707 debug output trace mechanism and has a much larger code and data size. Note
4708 that these values will vary depending on the efficiency of the compiler and
4709 the compiler options used during generation.
4712 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4713 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4715 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4716 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4719 2) iASL Compiler/Disassembler:
4721 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
4722 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
4723 Includes support in the disassembler.
4725 Implemented support for the new (ACPI 3.0) parameter to the Register macro,
4728 Fixed a problem where the _HE resource name for the Interrupt macro was
4729 referencing bit 0 instead of bit 1.
4731 Implemented check for maximum 255 interrupts in the Interrupt macro.
4733 Fixed a problem with the predefined resource descriptor names where
4734 incorrect AML code was generated if the offset within the resource buffer
4735 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
4736 but did not update the surrounding package lengths.
4738 Changes to the Dma macro: All channels within the channel list must be in
4739 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
4740 optional (default is BusMaster).
4742 Implemented check for maximum 7 data bytes for the VendorShort macro.
4744 The ReadWrite parameter is now optional for the Memory32 and similar macros.
4746 ----------------------------------------
4747 03 December 2004. Summary of changes for version 20041203:
4749 1) ACPI CA Core Subsystem:
4751 The low-level field insertion/extraction code (exfldio) has been completely
4752 rewritten to eliminate unnecessary complexity, bugs, and boundary
4755 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and ToDecimalString
4756 operators where the input operand could be inadvertently deleted if no
4757 conversion was necessary (e.g., if the input to ToInteger was an Integer
4760 Fixed a problem with the ToDecimalString and ToHexString where an incorrect
4761 exception code was returned if the resulting string would be > 200 chars.
4762 AE_STRING_LIMIT is now returned.
4764 Fixed a problem with the Concatenate operator where AE_OK was always
4765 returned, even if the operation failed.
4767 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
4768 semaphores to be allocated.
4770 Code and Data Size: Current and previous core subsystem library sizes are
4771 shown below. These are the code and data sizes for the acpica.lib produced
4772 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4773 any ACPI driver or OSPM code. The debug version of the code includes the
4774 debug output trace mechanism and has a much larger code and data size. Note
4775 that these values will vary depending on the efficiency of the compiler and
4776 the compiler options used during generation.
4779 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4780 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4782 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4783 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4786 2) iASL Compiler/Disassembler:
4788 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
4789 recently introduced in 20041119.
4791 Fixed a problem with the ToUUID macro where the upper nybble of each buffer
4792 byte was inadvertently set to zero.
4794 ----------------------------------------
4795 19 November 2004. Summary of changes for version 20041119:
4797 1) ACPI CA Core Subsystem:
4799 Fixed a problem in the internal ConvertToInteger routine where new integers
4800 were not truncated to 32 bits for 32-bit ACPI tables. This routine converts
4801 buffers and strings to integers.
4803 Implemented support to store a value to an Index() on a String object. This
4804 is an ACPI 2.0 feature that had not yet been implemented.
4806 Implemented new behavior for storing objects to individual package elements
4807 (via the Index() operator). The previous behavior was to invoke the implicit
4808 conversion rules if an object was already present at the index. The new
4809 behavior is to simply delete any existing object and directly store the new
4810 object. Although the ACPI specification seems unclear on this subject, other
4811 ACPI implementations behave in this manner. (This is the root of the
4812 AE_BAD_HEX_CONSTANT issue.)
4814 Modified the RSDP memory scan mechanism to support the extended checksum for
4815 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
4816 RSDP signature is found with a valid checksum.
4818 Code and Data Size: Current and previous core subsystem library sizes are
4819 shown below. These are the code and data sizes for the acpica.lib produced
4820 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4821 any ACPI driver or OSPM code. The debug version of the code includes the
4822 debug output trace mechanism and has a much larger code and data size. Note
4823 that these values will vary depending on the efficiency of the compiler and
4824 the compiler options used during generation.
4827 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4828 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4830 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4831 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4834 2) iASL Compiler/Disassembler:
4836 Fixed a missing semicolon in the aslcompiler.y file.
4838 ----------------------------------------
4839 05 November 2004. Summary of changes for version 20041105:
4841 1) ACPI CA Core Subsystem:
4843 Implemented support for FADT revision 2. This was an interim table (between
4844 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
4846 Implemented optional support to allow uninitialized LocalX and ArgX
4847 variables in a control method. The variables are initialized to an Integer
4848 object with a value of zero. This support is enabled by setting the
4849 AcpiGbl_EnableInterpreterSlack flag to TRUE.
4851 Implemented support for Integer objects for the SizeOf operator. Either 4
4852 or 8 is returned, depending on the current integer size (32-bit or 64-bit,
4853 depending on the parent table revision).
4855 Fixed a problem in the implementation of the SizeOf and ObjectType operators
4856 where the operand was resolved to a value too early, causing incorrect
4857 return values for some objects.
4859 Fixed some possible memory leaks during exceptional conditions.
4861 Code and Data Size: Current and previous core subsystem library sizes are
4862 shown below. These are the code and data sizes for the acpica.lib produced
4863 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4864 any ACPI driver or OSPM code. The debug version of the code includes the
4865 debug output trace mechanism and has a much larger code and data size. Note
4866 that these values will vary depending on the efficiency of the compiler and
4867 the compiler options used during generation.
4870 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4871 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
4873 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4874 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4877 2) iASL Compiler/Disassembler:
4879 Implemented support for all ACPI 3.0 reserved names and methods.
4881 Implemented all ACPI 3.0 grammar elements in the front-end, including
4882 support for semicolons.
4884 Implemented the ACPI 3.0 Function() and ToUUID() macros
4886 Fixed a problem in the disassembler where a Scope() operator would not be
4887 emitted properly if the target of the scope was in another table.
4889 ----------------------------------------
4890 15 October 2004. Summary of changes for version 20041015:
4892 Note: ACPI CA is currently undergoing an in-depth and complete formal
4893 evaluation to test/verify the following areas. Other suggestions are
4894 welcome. This will result in an increase in the frequency of releases and
4895 the number of bug fixes in the next few months.
4896 - Functional tests for all ASL/AML operators
4897 - All implicit/explicit type conversions
4898 - Bit fields and operation regions
4899 - 64-bit math support and 32-bit-only "truncated" math support
4900 - Exceptional conditions, both compiler and interpreter
4901 - Dynamic object deletion and memory leaks
4902 - ACPI 3.0 support when implemented
4903 - External interfaces to the ACPI subsystem
4906 1) ACPI CA Core Subsystem:
4908 Fixed two alignment issues on 64-bit platforms - within debug statements in
4909 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the Address
4910 field within the non-aligned ACPI generic address structure.
4912 Fixed a problem in the Increment and Decrement operators where incorrect
4913 operand resolution could result in the inadvertent modification of the
4914 original integer when the integer is passed into another method as an
4915 argument and the arg is then incremented/decremented.
4917 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-bit
4918 BCD number were truncated during conversion.
4920 Fixed a problem in the ToDecimal operator where the length of the resulting
4921 string could be set incorrectly too long if the input operand was a Buffer
4924 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte (0)
4925 within a buffer would prematurely terminate a compare between buffer
4928 Added a check for string overflow (>200 characters as per the ACPI
4929 specification) during the Concatenate operator with two string operands.
4931 Code and Data Size: Current and previous core subsystem library sizes are
4932 shown below. These are the code and data sizes for the acpica.lib produced
4933 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4934 any ACPI driver or OSPM code. The debug version of the code includes the
4935 debug output trace mechanism and has a much larger code and data size. Note
4936 that these values will vary depending on the efficiency of the compiler and
4937 the compiler options used during generation.
4940 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4941 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
4943 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4944 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
4948 2) iASL Compiler/Disassembler:
4950 Allow the use of the ObjectType operator on uninitialized Locals and Args
4951 (returns 0 as per the ACPI specification).
4953 Fixed a problem where the compiler would fault if there was a syntax error
4954 in the FieldName of all of the various CreateXXXField operators.
4956 Disallow the use of lower case letters within the EISAID macro, as per the
4957 ACPI specification. All EISAID strings must be of the form "UUUNNNN" Where
4958 U is an uppercase letter and N is a hex digit.
4961 ----------------------------------------
4962 06 October 2004. Summary of changes for version 20041006:
4964 1) ACPI CA Core Subsystem:
4966 Implemented support for the ACPI 3.0 Timer operator. This ASL function
4967 implements a 64-bit timer with 100 nanosecond granularity.
4969 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
4970 implement the ACPI 3.0 Timer operator. This allows the host OS to implement
4971 the timer with the best clock available. Also, it keeps the core subsystem
4972 out of the clock handling business, since the host OS (usually) performs
4975 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
4976 functions use a 64-bit address which is part of the packed ACPI Generic
4977 Address Structure. Since the structure is non-aligned, the alignment macros
4978 are now used to extract the address to a local variable before use.
4980 Fixed a problem where the ToInteger operator assumed all input strings were
4981 hexadecimal. The operator now handles both decimal strings and hex strings
4982 (prefixed with "0x").
4984 Fixed a problem where the string length in the string object created as a
4985 result of the internal ConvertToString procedure could be incorrect. This
4986 potentially affected all implicit conversions and also the ToDecimalString
4987 and ToHexString operators.
4989 Fixed two problems in the ToString operator. If the length parameter was
4990 zero, an incorrect string object was created and the value of the input
4991 length parameter was inadvertently changed from zero to Ones.
4993 Fixed a problem where the optional ResourceSource string in the ExtendedIRQ
4994 resource macro was ignored.
4996 Simplified the interfaces to the internal division functions, reducing code
4997 size and complexity.
4999 Code and Data Size: Current and previous core subsystem library sizes are
5000 shown below. These are the code and data sizes for the acpica.lib produced
5001 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5002 any ACPI driver or OSPM code. The debug version of the code includes the
5003 debug output trace mechanism and has a much larger code and data size. Note
5004 that these values will vary depending on the efficiency of the compiler and
5005 the compiler options used during generation.
5008 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
5009 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
5011 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5012 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
5015 2) iASL Compiler/Disassembler:
5017 Implemented support for the ACPI 3.0 Timer operator.
5019 Fixed a problem where the Default() operator was inadvertently ignored in a
5020 Switch/Case block. This was a problem in the translation of the Switch
5021 statement to If...Else pairs.
5023 Added support to allow a standalone Return operator, with no parentheses (or
5026 Fixed a problem with code generation for the ElseIf operator where the
5027 translated Else...If parse tree was improperly constructed leading to the
5030 ----------------------------------------
5031 22 September 2004. Summary of changes for version 20040922:
5033 1) ACPI CA Core Subsystem:
5035 Fixed a problem with the implementation of the LNot() operator where "Ones"
5036 was not returned for the TRUE case. Changed the code to return Ones instead
5037 of (!Arg) which was usually 1. This change affects iASL constant folding for
5040 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was not
5041 initialized properly -- Now zero the entire buffer in this case where the
5042 buffer already exists.
5044 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
5045 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
5046 related code considerably. This will require changes/updates to all OS
5047 interface layers (OSLs.)
5049 Implemented a new external interface, AcpiInstallExceptionHandler, to allow
5050 a system exception handler to be installed. This handler is invoked upon any
5051 run-time exception that occurs during control method execution.
5053 Added support for the DSDT in AcpiTbFindTable. This allows the
5054 DataTableRegion() operator to access the local copy of the DSDT.
5056 Code and Data Size: Current and previous core subsystem library sizes are
5057 shown below. These are the code and data sizes for the acpica.lib produced
5058 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5059 any ACPI driver or OSPM code. The debug version of the code includes the
5060 debug output trace mechanism and has a much larger code and data size. Note
5061 that these values will vary depending on the efficiency of the compiler and
5062 the compiler options used during generation.
5065 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
5066 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
5068 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
5069 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
5072 2) iASL Compiler/Disassembler:
5074 Fixed a problem with constant folding and the LNot operator. LNot was
5075 returning 1 in the TRUE case, not Ones as per the ACPI specification. This
5076 could result in the generation of an incorrect folded/reduced constant.
5078 End-Of-File is now allowed within a "//"-style comment. A parse error no
5079 longer occurs if such a comment is at the very end of the input ASL source
5082 Implemented the "-r" option to override the Revision in the table header.
5083 The initial use of this option will be to simplify the evaluation of the AML
5084 interpreter by allowing a single ASL source module to be compiled for either
5085 32-bit or 64-bit integers.
5088 ----------------------------------------
5089 27 August 2004. Summary of changes for version 20040827:
5091 1) ACPI CA Core Subsystem:
5093 - Implemented support for implicit object conversion in the non-numeric
5094 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual, and
5095 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
5096 the second operand is implicitly converted on the fly to match the type of
5097 the first operand. For example:
5099 LEqual (Source1, Source2)
5101 Source1 and Source2 must each evaluate to an integer, a string, or a buffer.
5102 The data type of Source1 dictates the required type of Source2. Source2 is
5103 implicitly converted if necessary to match the type of Source1.
5105 - Updated and corrected the behavior of the string conversion support. The
5106 rules concerning conversion of buffers to strings (according to the ACPI
5107 specification) are as follows:
5109 ToDecimalString - explicit byte-wise conversion of buffer to string of
5110 decimal values (0-255) separated by commas. ToHexString - explicit byte-wise
5111 conversion of buffer to string of hex values (0-FF) separated by commas.
5112 ToString - explicit byte-wise conversion of buffer to string. Byte-by-byte
5113 copy with no transform except NULL terminated. Any other implicit buffer-to-
5114 string conversion - byte-wise conversion of buffer to string of hex values
5115 (0-FF) separated by spaces.
5117 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
5119 - Fixed a problem in AcpiNsGetPathnameLength where the returned length was
5120 one byte too short in the case of a node in the root scope. This could
5121 cause a fault during debug output.
5123 - Code and Data Size: Current and previous core subsystem library sizes are
5124 shown below. These are the code and data sizes for the acpica.lib produced
5125 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5126 any ACPI driver or OSPM code. The debug version of the code includes the
5127 debug output trace mechanism and has a much larger code and data size. Note
5128 that these values will vary depending on the efficiency of the compiler and
5129 the compiler options used during generation.
5132 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
5133 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
5135 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
5136 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
5139 2) iASL Compiler/Disassembler:
5141 - Fixed a Linux generation error.
5144 ----------------------------------------
5145 16 August 2004. Summary of changes for version 20040816:
5147 1) ACPI CA Core Subsystem:
5149 Designed and implemented support within the AML interpreter for the so-
5150 called "implicit return". This support returns the result of the last ASL
5151 operation within a control method, in the absence of an explicit Return()
5152 operator. A few machines depend on this behavior, even though it is not
5153 explicitly supported by the ASL language. It is optional support that can
5154 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
5156 Removed support for the PCI_Config address space from the internal low level
5157 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
5158 support was not used internally, and would not work correctly anyway because
5159 the PCI bus number and segment number were not supported. There are
5160 separate interfaces for PCI configuration space access because of the unique
5163 Code and Data Size: Current and previous core subsystem library sizes are
5164 shown below. These are the code and data sizes for the acpica.lib produced
5165 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5166 any ACPI driver or OSPM code. The debug version of the code includes the
5167 debug output trace mechanism and has a much larger code and data size. Note
5168 that these values will vary depending on the efficiency of the compiler and
5169 the compiler options used during generation.
5172 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5173 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
5175 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
5176 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
5179 2) iASL Compiler/Disassembler:
5181 Fixed a problem where constants in ASL expressions at the root level (not
5182 within a control method) could be inadvertently truncated during code
5183 generation. This problem was introduced in the 20040715 release.
5186 ----------------------------------------
5187 15 July 2004. Summary of changes for version 20040715:
5189 1) ACPI CA Core Subsystem:
5191 Restructured the internal HW GPE interfaces to pass/track the current state
5192 of interrupts (enabled/disabled) in order to avoid possible deadlock and
5193 increase flexibility of the interfaces.
5195 Implemented a "lexicographical compare" for String and Buffer objects within
5196 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual --
5197 as per further clarification to the ACPI specification. Behavior is similar
5198 to C library "strcmp".
5200 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
5201 external function. In the 32-bit non-debug case, the stack use has been
5202 reduced from 168 bytes to 32 bytes.
5204 Deployed a new run-time configuration flag, AcpiGbl_EnableInterpreterSlack,
5205 whose purpose is to allow the AML interpreter to forgive certain bad AML
5206 constructs. Default setting is FALSE.
5208 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field IO
5209 support code. If enabled, it allows field access to go beyond the end of a
5210 region definition if the field is within the region length rounded up to the
5211 next access width boundary (a common coding error.)
5213 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
5214 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also, these
5215 symbols are lowercased by the latest version of the AcpiSrc tool.
5217 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
5218 rename "Register" to simply "Reg" to prevent certain compilers from
5221 Code and Data Size: Current and previous core subsystem library sizes are
5222 shown below. These are the code and data sizes for the acpica.lib produced
5223 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5224 any ACPI driver or OSPM code. The debug version of the code includes the
5225 debug output trace mechanism and has a much larger code and data size. Note
5226 that these values will vary depending on the efficiency of the compiler and
5227 the compiler options used during generation.
5230 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5231 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
5233 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
5234 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
5237 2) iASL Compiler/Disassembler:
5239 Implemented full support for Package objects within the Case() operator.
5240 Note: The Break() operator is currently not supported within Case blocks
5241 (TermLists) as there is some question about backward compatibility with ACPI
5245 Fixed a problem where complex terms were not supported properly within the
5248 Eliminated extraneous warning for compiler-emitted reserved names of the
5249 form "_T_x". (Used in Switch/Case operators.)
5251 Eliminated optimization messages for "_T_x" objects and small constants
5252 within the DefinitionBlock operator.
5255 ----------------------------------------
5256 15 June 2004. Summary of changes for version 20040615:
5258 1) ACPI CA Core Subsystem:
5260 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
5261 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
5264 All directory names in the entire source package are lower case, as they
5265 were in earlier releases.
5267 Implemented "Disassemble" command in the AML debugger that will disassemble
5268 a single control method.
5270 Code and Data Size: Current and previous core subsystem library sizes are
5271 shown below. These are the code and data sizes for the acpica.lib produced
5272 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5273 any ACPI driver or OSPM code. The debug version of the code includes the
5274 debug output trace mechanism and has a much larger code and data size. Note
5275 that these values will vary depending on the efficiency of the compiler and
5276 the compiler options used during generation.
5279 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
5280 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
5283 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
5284 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
5287 2) iASL Compiler/Disassembler:
5289 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
5290 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
5293 All directory names in the entire source package are lower case, as they
5294 were in earlier releases.
5296 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
5299 Fixed an issue with the Windows version of the compiler where later versions
5300 of Windows place the FADT in the registry under the name "FADT" and not
5301 "FACP" as earlier versions did. This applies when using the -g or -
5302 d<nofilename> options. The compiler now looks for both strings as
5305 Fixed a problem with compiler namepath optimization where a namepath within
5306 the Scope() operator could not be optimized if the namepath was a subpath of
5307 the current scope path.
5309 ----------------------------------------
5310 27 May 2004. Summary of changes for version 20040527:
5312 1) ACPI CA Core Subsystem:
5314 Completed a new design and implementation for EBDA (Extended BIOS Data Area)
5315 support in the RSDP scan code. The original code improperly scanned for the
5316 EBDA by simply scanning from memory location 0 to 0x400. The correct method
5317 is to first obtain the EBDA pointer from within the BIOS data area, then
5318 scan 1K of memory starting at the EBDA pointer. There appear to be few if
5319 any machines that place the RSDP in the EBDA, however.
5321 Integrated a fix for a possible fault during evaluation of BufferField
5322 arguments. Obsolete code that was causing the problem was removed.
5324 Found and fixed a problem in the Field Support Code where data could be
5325 corrupted on a bit field read that starts on an aligned boundary but does
5326 not end on an aligned boundary. Merged the read/write "datum length"
5327 calculation code into a common procedure.
5329 Rolled in a couple of changes to the FreeBSD-specific header.
5332 Code and Data Size: Current and previous core subsystem library sizes are
5333 shown below. These are the code and data sizes for the acpica.lib produced
5334 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5335 any ACPI driver or OSPM code. The debug version of the code includes the
5336 debug output trace mechanism and has a much larger code and data size. Note
5337 that these values will vary depending on the efficiency of the compiler and
5338 the compiler options used during generation.
5341 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5342 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5344 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
5345 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
5348 2) iASL Compiler/Disassembler:
5350 Fixed a generation warning produced by some overly-verbose compilers for a
5353 ----------------------------------------
5354 14 May 2004. Summary of changes for version 20040514:
5356 1) ACPI CA Core Subsystem:
5358 Fixed a problem where hardware GPE enable bits sometimes not set properly
5359 during and after GPE method execution. Result of 04/27 changes.
5361 Removed extra "clear all GPEs" when sleeping/waking.
5363 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
5364 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above to
5365 the new AcpiEv* calls as appropriate.
5367 ACPI_OS_NAME was removed from the OS-specific headers. The default name is
5368 now "Microsoft Windows NT" for maximum compatibility. However this can be
5369 changed by modifying the acconfig.h file.
5371 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
5372 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
5374 Run _INI methods on ThermalZone objects. This is against the ACPI
5375 specification, but there is apparently ASL code in the field that has these
5376 _INI methods, and apparently "other" AML interpreters execute them.
5378 Performed a full 16/32/64 bit lint that resulted in some small changes.
5380 Added a sleep simulation command to the AML debugger to test sleep code.
5382 Code and Data Size: Current and previous core subsystem library sizes are
5383 shown below. These are the code and data sizes for the acpica.lib produced
5384 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5385 any ACPI driver or OSPM code. The debug version of the code includes the
5386 debug output trace mechanism and has a much larger code and data size. Note
5387 that these values will vary depending on the efficiency of the compiler and
5388 the compiler options used during generation.
5391 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5392 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5394 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5395 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
5397 ----------------------------------------
5398 27 April 2004. Summary of changes for version 20040427:
5400 1) ACPI CA Core Subsystem:
5402 Completed a major overhaul of the GPE handling within ACPI CA. There are
5403 now three types of GPEs: wake-only, runtime-only, and combination wake/run.
5404 The only GPEs allowed to be combination wake/run are for button-style
5405 devices such as a control-method power button, control-method sleep button,
5406 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are not
5407 referenced by any _PRW methods are marked for "runtime" and hardware
5408 enabled. Any GPE that is referenced by a _PRW method is marked for "wake"
5409 (and disabled at runtime). However, at sleep time, only those GPEs that
5410 have been specifically enabled for wake via the AcpiEnableGpe interface will
5411 actually be hardware enabled.
5413 A new external interface has been added, AcpiSetGpeType(), that is meant to
5414 be used by device drivers to force a GPE to a particular type. It will be
5415 especially useful for the drivers for the button devices mentioned above.
5417 Completed restructuring of the ACPI CA initialization sequence so that
5418 default operation region handlers are installed before GPEs are initialized
5419 and the _PRW methods are executed. This will prevent errors when the _PRW
5420 methods attempt to access system memory or I/O space.
5422 GPE enable/disable no longer reads the GPE enable register. We now keep the
5423 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
5424 thus no longer depend on the hardware to maintain these bits.
5426 Always clear the wake status and fixed/GPE status bits before sleep, even
5429 Improved the AML debugger output for displaying the GPE blocks and their
5432 Added new strings for the _OSI method, of the form "Windows 2001 SPx" where
5435 Fixed a problem where the physical address was incorrectly calculated when
5436 the Load() operator was used to directly load from an Operation Region (vs.
5437 loading from a Field object.) Also added check for minimum table length for
5440 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
5443 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
5444 consistency with the other fields returned.
5446 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
5447 structure for each GPE in the system, so the size of this structure is
5450 CPU stack requirement reduction: Cleaned up the method execution and object
5451 evaluation paths so that now a parameter structure is passed, instead of
5452 copying the various method parameters over and over again.
5454 In evregion.c: Correctly exit and reenter the interpreter region if and
5455 only if dispatching an operation region request to a user-installed handler.
5456 Do not exit/reenter when dispatching to a default handler (e.g., default
5457 system memory or I/O handlers)
5460 Notes for updating drivers for the new GPE support. The following changes
5461 must be made to ACPI-related device drivers that are attached to one or more
5462 GPEs: (This information will be added to the ACPI CA Programmer Reference.)
5464 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you must
5465 explicitly call AcpiEnableGpe.
5466 2) There is a new interface called AcpiSetGpeType. This should be called
5467 before enabling the GPE. Also, this interface will automatically disable
5468 the GPE if it is currently enabled.
5469 3) AcpiEnableGpe no longer supports a GPE type flag.
5471 Specific drivers that must be changed:
5473 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
5474 AeGpeHandler, NULL);
5475 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
5476 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
5478 2) Button Drivers (Power, Lid, Sleep):
5479 Run _PRW method under parent device
5480 If _PRW exists: /* This is a control-method button */
5481 Extract GPE number and possibly GpeDevice
5482 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
5483 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
5485 For all other devices that have _PRWs, we automatically set the GPE type to
5486 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled. This
5487 must be done on a selective basis, usually requiring some kind of user app
5488 to allow the user to pick the wake devices.
5491 Code and Data Size: Current and previous core subsystem library sizes are
5492 shown below. These are the code and data sizes for the acpica.lib produced
5493 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5494 any ACPI driver or OSPM code. The debug version of the code includes the
5495 debug output trace mechanism and has a much larger code and data size. Note
5496 that these values will vary depending on the efficiency of the compiler and
5497 the compiler options used during generation.
5500 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5501 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5504 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
5505 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
5509 ----------------------------------------
5510 02 April 2004. Summary of changes for version 20040402:
5512 1) ACPI CA Core Subsystem:
5514 Fixed an interpreter problem where an indirect store through an ArgX
5515 parameter was incorrectly applying the "implicit conversion rules" during
5516 the store. From the ACPI specification: "If the target is a method local or
5517 argument (LocalX or ArgX), no conversion is performed and the result is
5518 stored directly to the target". The new behavior is to disable implicit
5519 conversion during ALL stores to an ArgX.
5521 Changed the behavior of the _PRW method scan to ignore any and all errors
5522 returned by a given _PRW. This prevents the scan from aborting from the
5523 failure of any single _PRW.
5525 Moved the runtime configuration parameters from the global init procedure to
5526 static variables in acglobal.h. This will allow the host to override the
5527 default values easily.
5529 Code and Data Size: Current and previous core subsystem library sizes are
5530 shown below. These are the code and data sizes for the acpica.lib produced
5531 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5532 any ACPI driver or OSPM code. The debug version of the code includes the
5533 debug output trace mechanism and has a much larger code and data size. Note
5534 that these values will vary depending on the efficiency of the compiler and
5535 the compiler options used during generation.
5538 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5539 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5541 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
5542 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
5545 2) iASL Compiler/Disassembler:
5547 iASL now fully disassembles SSDTs. However, External() statements are not
5548 generated automatically for unresolved symbols at this time. This is a
5549 planned feature for future implementation.
5551 Fixed a scoping problem in the disassembler that occurs when the type of the
5552 target of a Scope() operator is overridden. This problem caused an
5553 incorrectly nested internal namespace to be constructed.
5555 Any warnings or errors that are emitted during disassembly are now commented
5556 out automatically so that the resulting file can be recompiled without any
5559 ----------------------------------------
5560 26 March 2004. Summary of changes for version 20040326:
5562 1) ACPI CA Core Subsystem:
5564 Implemented support for "wake" GPEs via interaction between GPEs and the
5565 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
5566 identified as a WAKE GPE and by default will no longer be enabled at
5567 runtime. Previously, we were blindly enabling all GPEs with a corresponding
5568 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway. We
5569 believe this has been the cause of thousands of "spurious" GPEs on some
5572 This new GPE behavior is can be reverted to the original behavior (enable
5573 ALL GPEs at runtime) via a runtime flag.
5575 Fixed a problem where aliased control methods could not access objects
5576 properly. The proper scope within the namespace was not initialized
5577 (transferred to the target of the aliased method) before executing the
5580 Fixed a potential race condition on internal object deletion on the return
5581 object in AcpiEvaluateObject.
5583 Integrated a fix for resource descriptors where both _MEM and _MTP were
5584 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
5585 wide, 0x0F instead of 0x03.)
5587 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, preventing a
5588 fault in some cases.
5590 Updated Notify() values for debug statements in evmisc.c
5592 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
5594 Code and Data Size: Current and previous core subsystem library sizes are
5595 shown below. These are the code and data sizes for the acpica.lib produced
5596 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5597 any ACPI driver or OSPM code. The debug version of the code includes the
5598 debug output trace mechanism and has a much larger code and data size. Note
5599 that these values will vary depending on the efficiency of the compiler and
5600 the compiler options used during generation.
5604 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5605 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5607 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5608 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5610 ----------------------------------------
5611 11 March 2004. Summary of changes for version 20040311:
5613 1) ACPI CA Core Subsystem:
5615 Fixed a problem where errors occurring during the parse phase of control
5616 method execution did not abort cleanly. For example, objects created and
5617 installed in the namespace were not deleted. This caused all subsequent
5618 invocations of the method to return the AE_ALREADY_EXISTS exception.
5620 Implemented a mechanism to force a control method to "Serialized" execution
5621 if the method attempts to create namespace objects. (The root of the
5622 AE_ALREADY_EXISTS problem.)
5624 Implemented support for the predefined _OSI "internal" control method.
5625 Initial supported strings are "Linux", "Windows 2000", "Windows 2001", and
5626 "Windows 2001.1", and can be easily upgraded for new strings as necessary.
5627 This feature will allow "other" operating systems to execute the fully
5628 tested, "Windows" code path through the ASL code
5630 Global Lock Support: Now allows multiple acquires and releases with any
5631 internal thread. Removed concept of "owning thread" for this special mutex.
5633 Fixed two functions that were inappropriately declaring large objects on the
5634 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage during
5635 method execution considerably.
5637 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
5638 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
5640 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
5641 defined on the machine.
5643 Implemented two runtime options: One to force all control method execution
5644 to "Serialized" to mimic Windows behavior, another to disable _OSI support
5645 if it causes problems on a given machine.
5647 Code and Data Size: Current and previous core subsystem library sizes are
5648 shown below. These are the code and data sizes for the acpica.lib produced
5649 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5650 any ACPI driver or OSPM code. The debug version of the code includes the
5651 debug output trace mechanism and has a much larger code and data size. Note
5652 that these values will vary depending on the efficiency of the compiler and
5653 the compiler options used during generation.
5656 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5657 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5659 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5660 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5662 2) iASL Compiler/Disassembler:
5664 Fixed an array size problem for FreeBSD that would cause the compiler to
5667 ----------------------------------------
5668 20 February 2004. Summary of changes for version 20040220:
5671 1) ACPI CA Core Subsystem:
5673 Implemented execution of _SxD methods for Device objects in the
5674 GetObjectInfo interface.
5676 Fixed calls to _SST method to pass the correct arguments.
5678 Added a call to _SST on wake to restore to "working" state.
5680 Check for End-Of-Buffer failure case in the WalkResources interface.
5682 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
5683 structures to the beginning of the file.
5685 After wake, clear GPE status register(s) before enabling GPEs.
5687 After wake, clear/enable power button. (Perhaps we should clear/enable all
5688 fixed events upon wake.)
5690 Fixed a couple of possible memory leaks in the Namespace manager.
5692 Integrated latest acnetbsd.h file.
5694 ----------------------------------------
5695 11 February 2004. Summary of changes for version 20040211:
5698 1) ACPI CA Core Subsystem:
5700 Completed investigation and implementation of the call-by-reference
5701 mechanism for control method arguments.
5703 Fixed a problem where a store of an object into an indexed package could
5704 fail if the store occurs within a different method than the method that
5705 created the package.
5707 Fixed a problem where the ToDecimal operator could return incorrect results.
5709 Fixed a problem where the CopyObject operator could fail on some of the more
5710 obscure objects (e.g., Reference objects.)
5712 Improved the output of the Debug object to display buffer, package, and
5715 Fixed a problem where constructs of the form "RefOf (ArgX)" did not return
5716 the expected result.
5718 Added permanent ACPI_REPORT_ERROR macros for all instances of the
5719 ACPI_AML_INTERNAL exception.
5721 Integrated latest version of acfreebsd.h
5723 ----------------------------------------
5724 16 January 2004. Summary of changes for version 20040116:
5726 The purpose of this release is primarily to update the copyright years in
5727 each module, thus causing a huge number of diffs. There are a few small
5728 functional changes, however.
5730 1) ACPI CA Core Subsystem:
5732 Improved error messages when there is a problem finding one or more of the
5733 required base ACPI tables
5735 Reintroduced the definition of APIC_HEADER in actbl.h
5737 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
5739 Removed extraneous reference to NewObj in dsmthdat.c
5743 Fixed a problem introduced in December that disabled the correct disassembly
5744 of Resource Templates
5747 ----------------------------------------
5748 03 December 2003. Summary of changes for version 20031203:
5750 1) ACPI CA Core Subsystem:
5752 Changed the initialization of Operation Regions during subsystem
5753 init to perform two entire walks of the ACPI namespace; The first
5754 to initialize the regions themselves, the second to execute the
5755 _REG methods. This fixed some interdependencies across _REG
5756 methods found on some machines.
5758 Fixed a problem where a Store(Local0, Local1) could simply update
5759 the object reference count, and not create a new copy of the
5760 object if the Local1 is uninitialized.
5762 Implemented support for the _SST reserved method during sleep
5765 Implemented support to clear the SLP_TYP and SLP_EN bits when
5766 waking up, this is apparently required by some machines.
5768 When sleeping, clear the wake status only if SleepState is not S5.
5770 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
5771 pointer arithmetic advanced a string pointer too far.
5773 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
5774 could be returned if the requested table has not been loaded.
5776 Within the support for IRQ resources, restructured the handling of
5777 the active and edge/level bits.
5779 Fixed a few problems in AcpiPsxExecute() where memory could be
5780 leaked under certain error conditions.
5782 Improved error messages for the cases where the ACPI mode could
5785 Code and Data Size: Current and previous core subsystem library
5786 sizes are shown below. These are the code and data sizes for the
5787 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5788 these values do not include any ACPI driver or OSPM code. The
5789 debug version of the code includes the debug output trace
5790 mechanism and has a much larger code and data size. Note that
5791 these values will vary depending on the efficiency of the compiler
5792 and the compiler options used during generation.
5794 Previous Release (20031029):
5795 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5796 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5798 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5799 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5801 2) iASL Compiler/Disassembler:
5803 Implemented a fix for the iASL disassembler where a bad index was
5804 generated. This was most noticeable on 64-bit platforms
5807 ----------------------------------------
5808 29 October 2003. Summary of changes for version 20031029:
5810 1) ACPI CA Core Subsystem:
5813 Fixed a problem where a level-triggered GPE with an associated
5814 _Lxx control method was incorrectly cleared twice.
5816 Fixed a problem with the Field support code where an access can
5817 occur beyond the end-of-region if the field is non-aligned but
5818 extends to the very end of the parent region (resulted in an
5819 AE_AML_REGION_LIMIT exception.)
5821 Fixed a problem with ACPI Fixed Events where an RT Clock handler
5822 would not get invoked on an RTC event. The RTC event bitmasks for
5823 the PM1 registers were not being initialized properly.
5825 Implemented support for executing _STA and _INI methods for
5826 Processor objects. Although this is currently not part of the
5827 ACPI specification, there is existing ASL code that depends on the
5828 init-time execution of these methods.
5830 Implemented and deployed a GetDescriptorName function to decode
5831 the various types of internal descriptors. Guards against null
5832 descriptors during debug output also.
5834 Implemented and deployed a GetNodeName function to extract the 4-
5835 character namespace node name. This function simplifies the debug
5836 and error output, as well as guarding against null pointers during
5839 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
5840 simplify the debug and error output of 64-bit integers. This
5841 macro replaces the HIDWORD and LODWORD macros for dumping these
5844 Updated the implementation of the Stall() operator to only call
5845 AcpiOsStall(), and also return an error if the operand is larger
5846 than 255. This preserves the required behavior of not
5847 relinquishing the processor, as would happen if AcpiOsSleep() was
5848 called for "long stalls".
5850 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
5851 initialized are now treated as NOOPs.
5853 Cleaned up a handful of warnings during 64-bit generation.
5855 Fixed a reported error where and incorrect GPE number was passed
5856 to the GPE dispatch handler. This value is only used for error
5857 output, however. Used this opportunity to clean up and streamline
5858 the GPE dispatch code.
5860 Code and Data Size: Current and previous core subsystem library
5861 sizes are shown below. These are the code and data sizes for the
5862 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5863 these values do not include any ACPI driver or OSPM code. The
5865 debug version of the code includes the debug output trace
5866 mechanism and has a much larger code and data size. Note that
5867 these values will vary depending on the efficiency of the compiler
5868 and the compiler options used during generation.
5870 Previous Release (20031002):
5871 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5872 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5874 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5875 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5878 2) iASL Compiler/Disassembler:
5880 Updated the iASL compiler to return an error if the operand to the
5881 Stall() operator is larger than 255.
5884 ----------------------------------------
5885 02 October 2003. Summary of changes for version 20031002:
5888 1) ACPI CA Core Subsystem:
5890 Fixed a problem with Index Fields where the index was not
5891 incremented for fields that require multiple writes to the
5892 index/data registers (Fields that are wider than the data
5895 Fixed a problem with all Field objects where a write could go
5896 beyond the end-of-field if the field was larger than the access
5897 granularity and therefore required multiple writes to complete the
5898 request. An extra write beyond the end of the field could happen
5901 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
5902 would incorrectly be returned if the width of the Data Register
5903 was larger than the specified field access width.
5905 Completed fixes for LoadTable() and Unload() and verified their
5906 operation. Implemented full support for the "DdbHandle" object
5907 throughout the ACPI CA subsystem.
5909 Implemented full support for the MADT and ECDT tables in the ACPI
5910 CA header files. Even though these tables are not directly
5911 consumed by ACPI CA, the header definitions are useful for ACPI
5914 Integrated resource descriptor fixes posted to the Linux ACPI
5915 list. This included checks for minimum descriptor length, and
5916 support for trailing NULL strings within descriptors that have
5917 optional string elements.
5919 Code and Data Size: Current and previous core subsystem library
5920 sizes are shown below. These are the code and data sizes for the
5921 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5922 these values do not include any ACPI driver or OSPM code. The
5923 debug version of the code includes the debug output trace
5924 mechanism and has a much larger code and data size. Note that
5925 these values will vary depending on the efficiency of the compiler
5926 and the compiler options used during generation.
5928 Previous Release (20030918):
5929 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5930 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5932 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5933 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5938 Implemented detection of non-ASCII characters within the input
5939 source ASL file. This catches attempts to compile binary (AML)
5940 files early in the compile, with an informative error message.
5942 Fixed a problem where the disassembler would fault if the output
5943 filename could not be generated or if the output file could not be
5946 ----------------------------------------
5947 18 September 2003. Summary of changes for version 20030918:
5950 1) ACPI CA Core Subsystem:
5952 Found and fixed a longstanding problem with the late execution of
5953 the various deferred AML opcodes (such as Operation Regions,
5954 Buffer Fields, Buffers, and Packages). If the name string
5955 specified for the name of the new object placed the object in a
5956 scope other than the current scope, the initialization/execution
5957 of the opcode failed. The solution to this problem was to
5958 implement a mechanism where the late execution of such opcodes
5959 does not attempt to lookup/create the name a second time in an
5960 incorrect scope. This fixes the "region size computed
5961 incorrectly" problem.
5963 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
5964 Global Lock AE_BAD_PARAMETER error.
5966 Fixed several 64-bit issues with prototypes, casting and data
5969 Removed duplicate prototype from acdisasm.h
5971 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
5973 Code and Data Size: Current and previous core subsystem library
5974 sizes are shown below. These are the code and data sizes for the
5975 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5976 these values do not include any ACPI driver or OSPM code. The
5977 debug version of the code includes the debug output trace
5978 mechanism and has a much larger code and data size. Note that
5979 these values will vary depending on the efficiency of the compiler
5980 and the compiler options used during generation.
5984 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
5985 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
5987 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5988 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5993 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
5994 correct sleep time in seconds.
5996 ----------------------------------------
5997 14 July 2003. Summary of changes for version 20030619:
5999 1) ACPI CA Core Subsystem:
6001 Parse SSDTs in order discovered, as opposed to reverse order
6004 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
6011 Dynamically allocate SDT list (suggested by Andi Kleen)
6013 proc function return value cleanups (Andi Kleen)
6015 Correctly handle NMI watchdog during long stalls (Andrew Morton)
6017 Make it so acpismp=force works (reported by Andrew Morton)
6020 ----------------------------------------
6021 19 June 2003. Summary of changes for version 20030619:
6023 1) ACPI CA Core Subsystem:
6025 Fix To/FromBCD, eliminating the need for an arch-specific #define.
6027 Do not acquire a semaphore in the S5 shutdown path.
6029 Fix ex_digits_needed for 0. (Takayoshi Kochi)
6031 Fix sleep/stall code reversal. (Andi Kleen)
6033 Revert a change having to do with control method calling
6038 acpiphp update (Takayoshi Kochi)
6040 Export acpi_disabled for sonypi (Stelian Pop)
6042 Mention acpismp=force in config help
6044 Re-add acpitable.c and acpismp=force. This improves backwards
6046 compatibility and also cleans up the code to a significant degree.
6048 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
6050 ----------------------------------------
6051 22 May 2003. Summary of changes for version 20030522:
6053 1) ACPI CA Core Subsystem:
6055 Found and fixed a reported problem where an AE_NOT_FOUND error
6056 occurred occasionally during _BST evaluation. This turned out to
6057 be an Owner ID allocation issue where a called method did not get
6058 a new ID assigned to it. Eventually, (after 64k calls), the Owner
6059 ID UINT16 would wraparound so that the ID would be the same as the
6060 caller's and the called method would delete the caller's
6063 Implemented extended error reporting for control methods that are
6064 aborted due to a run-time exception. Output includes the exact
6065 AML instruction that caused the method abort, a dump of the method
6066 locals and arguments at the time of the abort, and a trace of all
6067 nested control method calls.
6069 Modified the interpreter to allow the creation of buffers of zero
6070 length from the AML code. Implemented new code to ensure that no
6071 attempt is made to actually allocate a memory buffer (of length
6072 zero) - instead, a simple buffer object with a NULL buffer pointer
6073 and length zero is created. A warning is no longer issued when
6074 the AML attempts to create a zero-length buffer.
6076 Implemented a workaround for the "leading asterisk issue" in
6077 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
6078 asterisk is automatically removed if present in any HID, UID, or
6079 CID strings. The iASL compiler will still flag this asterisk as
6082 Implemented full support for _CID methods that return a package of
6083 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
6084 now additionally returns a device _CID list if present. This
6085 required a change to the external interface in order to pass an
6086 ACPI_BUFFER object as a parameter since the _CID list is of
6089 Fixed a problem with the new AE_SAME_HANDLER exception where
6090 handler initialization code did not know about this exception.
6092 Code and Data Size: Current and previous core subsystem library
6093 sizes are shown below. These are the code and data sizes for the
6094 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
6095 these values do not include any ACPI driver or OSPM code. The
6096 debug version of the code includes the debug output trace
6097 mechanism and has a much larger code and data size. Note that
6098 these values will vary depending on the efficiency of the compiler
6099 and the compiler options used during generation.
6101 Previous Release (20030509):
6102 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
6103 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
6105 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
6106 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
6111 Fixed a bug in which we would reinitialize the ACPI interrupt
6112 after it was already working, thus disabling all ACPI and the IRQs
6113 for any other device sharing the interrupt. (Thanks to Stian
6116 Toshiba driver update (John Belmonte)
6118 Return only 0 or 1 for our interrupt handler status (Andrew
6124 Fixed a reported problem where multiple (nested) ElseIf()
6125 statements were not handled correctly by the compiler, resulting
6126 in incorrect warnings and incorrect AML code. This was a problem
6127 in both the ASL parser and the code generator.
6132 Added changes to existing interfaces, new exception codes, and new
6133 text concerning reference count object management versus garbage
6136 ----------------------------------------
6137 09 May 2003. Summary of changes for version 20030509.
6140 1) ACPI CA Core Subsystem:
6142 Changed the subsystem initialization sequence to hold off
6143 installation of address space handlers until the hardware has been
6144 initialized and the system has entered ACPI mode. This is because
6145 the installation of space handlers can cause _REG methods to be
6146 run. Previously, the _REG methods could potentially be run before
6147 ACPI mode was enabled.
6149 Fixed some memory leak issues related to address space handler and
6150 notify handler installation. There were some problems with the
6151 reference count mechanism caused by the fact that the handler
6152 objects are shared across several namespace objects.
6154 Fixed a reported problem where reference counts within the
6155 namespace were not properly updated when named objects created by
6156 method execution were deleted.
6158 Fixed a reported problem where multiple SSDTs caused a deletion
6159 issue during subsystem termination. Restructured the table data
6160 structures to simplify the linked lists and the related code.
6162 Fixed a problem where the table ID associated with secondary
6163 tables (SSDTs) was not being propagated into the namespace objects
6164 created by those tables. This would only present a problem for
6165 tables that are unloaded at run-time, however.
6167 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
6168 type as the length parameter (instead of UINT32).
6170 Solved a long-standing problem where an ALREADY_EXISTS error
6171 appears on various systems. This problem could happen when there
6172 are multiple PCI_Config operation regions under a single PCI root
6173 bus. This doesn't happen very frequently, but there are some
6174 systems that do this in the ASL.
6176 Fixed a reported problem where the internal DeleteNode function
6177 was incorrectly handling the case where a namespace node was the
6178 first in the parent's child list, and had additional peers (not
6179 the only child, but first in the list of children.)
6181 Code and Data Size: Current core subsystem library sizes are shown
6182 below. These are the code and data sizes for the acpica.lib
6183 produced by the Microsoft Visual C++ 6.0 compiler, and these
6184 values do not include any ACPI driver or OSPM code. The debug
6185 version of the code includes the debug output trace mechanism and
6186 has a much larger code and data size. Note that these values will
6187 vary depending on the efficiency of the compiler and the compiler
6188 options used during generation.
6191 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
6192 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
6194 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
6195 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
6200 Allow ":" in OS override string (Ducrot Bruno)
6202 Kobject fix (Greg KH)
6205 3 iASL Compiler/Disassembler:
6207 Fixed a problem in the generation of the C source code files (AML
6208 is emitted in C source statements for BIOS inclusion) where the
6209 Ascii dump that appears within a C comment at the end of each line
6210 could cause a compile time error if the AML sequence happens to
6211 have an open comment or close comment sequence embedded.
6214 ----------------------------------------
6215 24 April 2003. Summary of changes for version 20030424.
6218 1) ACPI CA Core Subsystem:
6220 Support for big-endian systems has been implemented. Most of the
6221 support has been invisibly added behind big-endian versions of the
6224 Fixed a problem in AcpiHwDisableGpeBlock() and
6225 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
6226 low level hardware write routine. The offset parameter was
6227 actually eliminated from the low level read/write routines because
6228 they had become obsolete.
6230 Fixed a problem where a handler object was deleted twice during
6231 the removal of a fixed event handler.
6236 A fix for SMP systems with link devices was contributed by
6240 (2.5) Return whether we handled the interrupt in our IRQ handler.
6241 (Linux ISRs no longer return void, so we can propagate the handler
6242 return value from the ACPI CA core back to the OS.)
6248 The ACPI CA Programmer Reference has been updated to reflect new
6249 interfaces and changes to existing interfaces.
6251 ----------------------------------------
6252 28 March 2003. Summary of changes for version 20030328.
6254 1) ACPI CA Core Subsystem:
6256 The GPE Block Device support has been completed. New interfaces
6257 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
6258 interfaces (enable, disable, clear, getstatus) have been split
6259 into separate interfaces for Fixed Events and General Purpose
6260 Events (GPEs) in order to support GPE Block Devices properly.
6262 Fixed a problem where the error message "Failed to acquire
6263 semaphore" would appear during operations on the embedded
6266 Code and Data Size: Current core subsystem library sizes are shown
6267 below. These are the code and data sizes for the acpica.lib
6268 produced by the Microsoft Visual C++ 6.0 compiler, and these
6269 values do not include any ACPI driver or OSPM code. The debug
6270 version of the code includes the debug output trace mechanism and
6271 has a much larger code and data size. Note that these values will
6272 vary depending on the efficiency of the compiler and the compiler
6273 options used during generation.
6276 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
6277 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
6279 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
6280 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
6283 ----------------------------------------
6284 28 February 2003. Summary of changes for version 20030228.
6287 1) ACPI CA Core Subsystem:
6289 The GPE handling and dispatch code has been completely overhauled
6290 in preparation for support of GPE Block Devices (ID ACPI0006).
6291 This affects internal data structures and code only; there should
6292 be no differences visible externally. One new file has been
6295 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
6296 fields that are used to determine the GPE block lengths. The
6297 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
6298 structures are ignored. This is per the ACPI specification but it
6299 isn't very clear. The full 256 Block 0/1 GPEs are now supported
6300 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
6302 In the SCI interrupt handler, removed the read of the PM1_CONTROL
6303 register to look at the SCI_EN bit. On some machines, this read
6304 causes an SMI event and greatly slows down SCI events. (This may
6305 in fact be the cause of slow battery status response on some
6308 Fixed a problem where a store of a NULL string to a package object
6309 could cause the premature deletion of the object. This was seen
6310 during execution of the battery _BIF method on some systems,
6311 resulting in no battery data being returned.
6313 Added AcpiWalkResources interface to simplify parsing of resource
6316 Code and Data Size: Current core subsystem library sizes are shown
6317 below. These are the code and data sizes for the acpica.lib
6318 produced by the Microsoft Visual C++ 6.0 compiler, and these
6319 values do not include any ACPI driver or OSPM code. The debug
6320 version of the code includes the debug output trace mechanism and
6321 has a much larger code and data size. Note that these values will
6322 vary depending on the efficiency of the compiler and the compiler
6323 options used during generation.
6326 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6327 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6329 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
6330 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
6335 S3 fixes (Ole Rohne)
6337 Update ACPI PHP driver with to use new acpi_walk_resource API
6340 Add S4BIOS support (Pavel Machek)
6342 Map in entire table before performing checksum (John Stultz)
6344 Expand the mem= cmdline to allow the specification of reserved and
6345 ACPI DATA blocks (Pavel Machek)
6347 Never use ACPI on VISWS
6349 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
6351 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
6352 causing us to think that some systems support C2 when they really
6355 Do not count processor objects for non-present CPUs (Thanks to
6361 Fixed a problem where ASL include files could not be found and
6364 Added support for the _PDC reserved name.
6367 ----------------------------------------
6368 22 January 2003. Summary of changes for version 20030122.
6371 1) ACPI CA Core Subsystem:
6373 Added a check for constructs of the form: Store (Local0, Local0)
6374 where Local0 is not initialized. Apparently, some BIOS
6375 programmers believe that this is a NOOP. Since this store doesn't
6376 do anything anyway, the new prototype behavior will ignore this
6377 error. This is a case where we can relax the strict checking in
6378 the interpreter in the name of compatibility.
6383 The AcpiSrc Source Conversion Utility has been released with the
6384 Linux package for the first time. This is the utility that is
6385 used to convert the ACPI CA base source code to the Linux version.
6387 (Both) Handle P_BLK lengths shorter than 6 more gracefully
6389 (Both) Move more headers to include/acpi, and delete an unused
6392 (Both) Move drivers/acpi/include directory to include/acpi
6394 (Both) Boot functions don't use cmdline, so don't pass it around
6396 (Both) Remove include of unused header (Adrian Bunk)
6398 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
6400 former now also includes the latter, acpiphp.h only needs the one,
6403 (2.5) Make it possible to select method of bios restoring after S3
6404 resume. [=> no more ugly ifdefs] (Pavel Machek)
6406 (2.5) Make proc write interfaces work (Pavel Machek)
6408 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
6410 (2.5) Break out ACPI Perf code into its own module, under cpufreq
6413 (2.4) S4BIOS support (Ducrot Bruno)
6415 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
6421 Added support to disassemble SSDT and PSDTs.
6423 Implemented support to obtain SSDTs from the Windows registry if
6427 ----------------------------------------
6428 09 January 2003. Summary of changes for version 20030109.
6430 1) ACPI CA Core Subsystem:
6432 Changed the behavior of the internal Buffer-to-String conversion
6433 function. The current ACPI specification states that the contents
6434 of the buffer are "converted to a string of two-character
6435 hexadecimal numbers, each separated by a space". Unfortunately,
6436 this definition is not backwards compatible with existing ACPI 1.0
6437 implementations (although the behavior was not defined in the ACPI
6438 1.0 specification). The new behavior simply copies data from the
6439 buffer to the string until a null character is found or the end of
6440 the buffer is reached. The new String object is always null
6441 terminated. This problem was seen during the generation of _BIF
6442 battery data where incorrect strings were returned for battery
6443 type, etc. This will also require an errata to the ACPI
6446 Renamed all instances of NATIVE_UINT and NATIVE_INT to
6447 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
6449 Copyright in all module headers (both Linux and non-Linux) has be
6452 Code and Data Size: Current core subsystem library sizes are shown
6453 below. These are the code and data sizes for the acpica.lib
6454 produced by the Microsoft Visual C++ 6.0 compiler, and these
6455 values do not include any ACPI driver or OSPM code. The debug
6456 version of the code includes the debug output trace mechanism and
6457 has a much larger code and data size. Note that these values will
6458 vary depending on the efficiency of the compiler and the compiler
6459 options used during generation.
6462 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6463 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6465 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6466 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6471 Fixed an oops on module insertion/removal (Matthew Tippett)
6473 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
6475 (2.5) Replace pr_debug (Randy Dunlap)
6477 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
6479 (Both) Eliminate spawning of thread from timer callback, in favor
6482 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
6484 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
6486 (Both) Add missing statics to button.c (Pavel Machek)
6488 Several changes have been made to the source code translation
6489 utility that generates the Linux Code in order to make the code
6492 All typedefs on structs and unions have been removed in keeping
6493 with the Linux coding style.
6495 Removed the non-Linux SourceSafe module revision number from each
6498 Completed major overhaul of symbols to be lowercased for linux.
6499 Doubled the number of symbols that are lowercased.
6501 Fixed a problem where identifiers within procedure headers and
6502 within quotes were not fully lower cased (they were left with a
6505 Some C macros whose only purpose is to allow the generation of 16-
6506 bit code are now completely removed in the Linux code, increasing
6507 readability and maintainability.
6509 ----------------------------------------
6511 12 December 2002. Summary of changes for version 20021212.
6514 1) ACPI CA Core Subsystem:
6516 Fixed a problem where the creation of a zero-length AML Buffer
6517 would cause a fault.
6519 Fixed a problem where a Buffer object that pointed to a static AML
6520 buffer (in an ACPI table) could inadvertently be deleted, causing
6523 Fixed a problem where a user buffer (passed in to the external
6524 ACPI CA interfaces) could be overwritten if the buffer was too
6525 small to complete the operation, causing memory corruption.
6527 Fixed a problem in the Buffer-to-String conversion code where a
6528 string of length one was always returned, regardless of the size
6529 of the input Buffer object.
6531 Removed the NATIVE_CHAR data type across the entire source due to
6532 lack of need and lack of consistent use.
6534 Code and Data Size: Current core subsystem library sizes are shown
6535 below. These are the code and data sizes for the acpica.lib
6536 produced by the Microsoft Visual C++ 6.0 compiler, and these
6537 values do not include any ACPI driver or OSPM code. The debug
6538 version of the code includes the debug output trace mechanism and
6539 has a much larger code and data size. Note that these values will
6540 vary depending on the efficiency of the compiler and the compiler
6541 options used during generation.
6544 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6545 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6547 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
6548 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
6551 ----------------------------------------
6552 05 December 2002. Summary of changes for version 20021205.
6554 1) ACPI CA Core Subsystem:
6556 Fixed a problem where a store to a String or Buffer object could
6557 cause corruption of the DSDT if the object type being stored was
6558 the same as the target object type and the length of the object
6559 being stored was equal to or smaller than the original (existing)
6560 target object. This was seen to cause corruption of battery _BIF
6561 buffers if the _BIF method modified the buffer on the fly.
6563 Fixed a problem where an internal error was generated if a control
6564 method invocation was used in an OperationRegion, Buffer, or
6565 Package declaration. This was caused by the deferred parsing of
6566 the control method and thus the deferred creation of the internal
6567 method object. The solution to this problem was to create the
6568 internal method object at the moment the method is encountered in
6569 the first pass - so that subsequent references to the method will
6570 able to obtain the required parameter count and thus properly
6571 parse the method invocation. This problem presented itself as an
6572 AE_AML_INTERNAL during the pass 1 parse phase during table load.
6574 Fixed a problem where the internal String object copy routine did
6575 not always allocate sufficient memory for the target String object
6576 and caused memory corruption. This problem was seen to cause
6577 "Allocation already present in list!" errors as memory allocation
6580 Implemented a new function for the evaluation of namespace objects
6581 that allows the specification of the allowable return object
6582 types. This simplifies a lot of code that checks for a return
6583 object of one or more specific objects returned from the
6584 evaluation (such as _STA, etc.) This may become and external
6585 function if it would be useful to ACPI-related drivers.
6587 Completed another round of prefixing #defines with "ACPI_" for
6590 Completed additional code restructuring to allow more modular
6591 linking for iASL compiler and AcpiExec. Several files were split
6592 creating new files. New files: nsparse.c dsinit.c evgpe.c
6594 Implemented an abort mechanism to terminate an executing control
6595 method via the AML debugger. This feature is useful for debugging
6596 control methods that depend (wait) for specific hardware
6599 Code and Data Size: Current core subsystem library sizes are shown
6600 below. These are the code and data sizes for the acpica.lib
6601 produced by the Microsoft Visual C++ 6.0 compiler, and these
6602 values do not include any ACPI driver or OSPM code. The debug
6603 version of the code includes the debug output trace mechanism and
6604 has a much larger code and data size. Note that these values will
6605 vary depending on the efficiency of the compiler and the compiler
6606 options used during generation.
6609 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6610 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6612 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6613 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6616 2) iASL Compiler/Disassembler
6618 Fixed a compiler code generation problem for "Interrupt" Resource
6619 Descriptors. If specified in the ASL, the optional "Resource
6620 Source Index" and "Resource Source" fields were not inserted into
6621 the correct location within the AML resource descriptor, creating
6622 an invalid descriptor.
6624 Fixed a disassembler problem for "Interrupt" resource descriptors.
6625 The optional "Resource Source Index" and "Resource Source" fields
6629 ----------------------------------------
6630 22 November 2002. Summary of changes for version 20021122.
6633 1) ACPI CA Core Subsystem:
6635 Fixed a reported problem where an object stored to a Method Local
6636 or Arg was not copied to a new object during the store - the
6637 object pointer was simply copied to the Local/Arg. This caused
6638 all subsequent operations on the Local/Arg to also affect the
6639 original source of the store operation.
6641 Fixed a problem where a store operation to a Method Local or Arg
6642 was not completed properly if the Local/Arg contained a reference
6643 (from RefOf) to a named field. The general-purpose store-to-
6644 namespace-node code is now used so that this case is handled
6647 Fixed a problem where the internal object copy routine would cause
6648 a protection fault if the object being copied was a Package and
6649 contained either 1) a NULL package element or 2) a nested sub-
6652 Fixed a problem with the GPE initialization that resulted from an
6653 ambiguity in the ACPI specification. One section of the
6654 specification states that both the address and length of the GPE
6655 block must be zero if the block is not supported. Another section
6656 implies that only the address need be zero if the block is not
6657 supported. The code has been changed so that both the address and
6658 the length must be non-zero to indicate a valid GPE block (i.e.,
6659 if either the address or the length is zero, the GPE block is
6662 Code and Data Size: Current core subsystem library sizes are shown
6663 below. These are the code and data sizes for the acpica.lib
6664 produced by the Microsoft Visual C++ 6.0 compiler, and these
6665 values do not include any ACPI driver or OSPM code. The debug
6666 version of the code includes the debug output trace mechanism and
6667 has a much larger code and data size. Note that these values will
6668 vary depending on the efficiency of the compiler and the compiler
6669 options used during generation.
6672 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6673 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6675 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6676 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6681 Cleaned up EC driver. Exported an external EC read/write
6682 interface. By going through this, other drivers (most notably
6683 sonypi) will be able to serialize access to the EC.
6686 3) iASL Compiler/Disassembler
6688 Implemented support to optionally generate include files for both
6689 ASM and C (the -i switch). This simplifies BIOS development by
6690 automatically creating include files that contain external
6691 declarations for the symbols that are created within the
6693 (optionally generated) ASM and C AML source files.
6696 ----------------------------------------
6697 15 November 2002. Summary of changes for version 20021115.
6699 1) ACPI CA Core Subsystem:
6701 Fixed a memory leak problem where an error during resolution of
6703 method arguments during a method invocation from another method
6704 failed to cleanup properly by deleting all successfully resolved
6707 Fixed a problem where the target of the Index() operator was not
6708 correctly constructed if the source object was a package. This
6709 problem has not been detected because the use of a target operand
6710 with Index() is very rare.
6712 Fixed a problem with the Index() operator where an attempt was
6713 made to delete the operand objects twice.
6715 Fixed a problem where an attempt was made to delete an operand
6716 twice during execution of the CondRefOf() operator if the target
6719 Implemented the first of perhaps several internal create object
6720 functions that create and initialize a specific object type. This
6721 consolidates duplicated code wherever the object is created, thus
6722 shrinking the size of the subsystem.
6724 Implemented improved debug/error messages for errors that occur
6725 during nested method invocations. All executing method pathnames
6726 are displayed (with the error) as the call stack is unwound - thus
6729 Fixed a problem introduced in the 10/02 release that caused
6730 premature deletion of a buffer object if a buffer was used as an
6731 ASL operand where an integer operand is required (Thus causing an
6732 implicit object conversion from Buffer to Integer.) The change in
6733 the 10/02 release was attempting to fix a memory leak (albeit
6736 Code and Data Size: Current core subsystem library sizes are shown
6737 below. These are the code and data sizes for the acpica.lib
6738 produced by the Microsoft Visual C++ 6.0 compiler, and these
6739 values do not include any ACPI driver or OSPM code. The debug
6740 version of the code includes the debug output trace mechanism and
6741 has a much larger code and data size. Note that these values will
6742 vary depending on the efficiency of the compiler and the compiler
6743 options used during generation.
6746 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6747 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6749 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6750 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6755 Changed the implementation of the ACPI semaphores to use down()
6756 instead of down_interruptable(). It is important that the
6757 execution of ACPI control methods not be interrupted by signals.
6758 Methods must run to completion, or the system may be left in an
6759 unknown/unstable state.
6761 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
6765 3) iASL Compiler/Disassembler
6768 Changed the default location of output files. All output files
6769 are now placed in the current directory by default instead of in
6770 the directory of the source file. This change may affect some
6771 existing makefiles, but it brings the behavior of the compiler in
6772 line with other similar tools. The location of the output files
6773 can be overridden with the -p command line switch.
6776 ----------------------------------------
6777 11 November 2002. Summary of changes for version 20021111.
6780 0) ACPI Specification 2.0B is released and is now available at:
6781 http://www.acpi.info/index.html
6784 1) ACPI CA Core Subsystem:
6786 Implemented support for the ACPI 2.0 SMBus Operation Regions.
6787 This includes the early detection and handoff of the request to
6788 the SMBus region handler (avoiding all of the complex field
6789 support code), and support for the bidirectional return packet
6790 from an SMBus write operation. This paves the way for the
6791 development of SMBus drivers in each host operating system.
6793 Fixed a problem where the semaphore WAIT_FOREVER constant was
6794 defined as 32 bits, but must be 16 bits according to the ACPI
6795 specification. This had the side effect of causing ASL
6796 Mutex/Event timeouts even though the ASL code requested a wait
6797 forever. Changed all internal references to the ACPI timeout
6798 parameter to 16 bits to prevent future problems. Changed the name
6799 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
6801 Code and Data Size: Current core subsystem library sizes are shown
6802 below. These are the code and data sizes for the acpica.lib
6803 produced by the Microsoft Visual C++ 6.0 compiler, and these
6804 values do not include any ACPI driver or OSPM code. The debug
6805 version of the code includes the debug output trace mechanism and
6806 has a much larger code and data size. Note that these values will
6807 vary depending on the efficiency of the compiler and the compiler
6808 options used during generation.
6811 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6812 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6814 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6815 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6820 Module loading/unloading fixes (John Cagle)
6823 3) iASL Compiler/Disassembler
6825 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
6827 Implemented support for the disassembly of all SMBus protocol
6828 keywords (SMBQuick, SMBWord, etc.)
6830 ----------------------------------------
6831 01 November 2002. Summary of changes for version 20021101.
6834 1) ACPI CA Core Subsystem:
6836 Fixed a problem where platforms that have a GPE1 block but no GPE0
6837 block were not handled correctly. This resulted in a "GPE
6838 overlap" error message. GPE0 is no longer required.
6840 Removed code added in the previous release that inserted nodes
6841 into the namespace in alphabetical order. This caused some side-
6842 effects on various machines. The root cause of the problem is
6843 still under investigation since in theory, the internal ordering
6844 of the namespace nodes should not matter.
6847 Enhanced error reporting for the case where a named object is not
6848 found during control method execution. The full ACPI namepath
6849 (name reference) of the object that was not found is displayed in
6852 Note: as a result of the overhaul of the namespace object types in
6853 the previous release, the namespace nodes for the predefined
6854 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
6855 instead of ACPI_TYPE_ANY. This simplifies the namespace
6856 management code but may affect code that walks the namespace tree
6857 looking for specific object types.
6859 Code and Data Size: Current core subsystem library sizes are shown
6860 below. These are the code and data sizes for the acpica.lib
6861 produced by the Microsoft Visual C++ 6.0 compiler, and these
6862 values do not include any ACPI driver or OSPM code. The debug
6863 version of the code includes the debug output trace mechanism and
6864 has a much larger code and data size. Note that these values will
6865 vary depending on the efficiency of the compiler and the compiler
6866 options used during generation.
6869 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
6870 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
6872 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6873 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6878 Fixed a problem introduced in the previous release where the
6879 Processor and Thermal objects were not recognized and installed in
6880 /proc. This was related to the scope type change described above.
6883 3) iASL Compiler/Disassembler
6885 Implemented the -g option to get all of the required ACPI tables
6886 from the registry and save them to files (Windows version of the
6887 compiler only.) The required tables are the FADT, FACS, and DSDT.
6889 Added ACPI table checksum validation during table disassembly in
6890 order to catch corrupted tables.
6893 ----------------------------------------
6894 22 October 2002. Summary of changes for version 20021022.
6896 1) ACPI CA Core Subsystem:
6898 Implemented a restriction on the Scope operator that the target
6899 must already exist in the namespace at the time the operator is
6900 encountered (during table load or method execution). In other
6901 words, forward references are not allowed and Scope() cannot
6902 create a new object. This changes the previous behavior where the
6903 interpreter would create the name if not found. This new behavior
6904 correctly enables the search-to-root algorithm during namespace
6905 lookup of the target name. Because of this upsearch, this fixes
6906 the known Compaq _SB_.OKEC problem and makes both the AML
6907 interpreter and iASL compiler compatible with other ACPI
6910 Completed a major overhaul of the internal ACPI object types for
6911 the ACPI Namespace and the associated operand objects. Many of
6912 these types had become obsolete with the introduction of the two-
6913 pass namespace load. This cleanup simplifies the code and makes
6914 the entire namespace load mechanism much clearer and easier to
6917 Improved debug output for tracking scope opening/closing to help
6918 diagnose scoping issues. The old scope name as well as the new
6919 scope name are displayed. Also improved error messages for
6920 problems with ASL Mutex objects and error messages for GPE
6923 Cleaned up the namespace dump code, removed obsolete code.
6925 All string output (for all namespace/object dumps) now uses the
6926 common ACPI string output procedure which handles escapes properly
6927 and does not emit non-printable characters.
6929 Fixed some issues with constants in the 64-bit version of the
6930 local C library (utclib.c)
6935 EC Driver: No longer attempts to acquire the Global Lock at
6939 3) iASL Compiler/Disassembler
6941 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
6942 2 opcodes outside of a control method. This means that the
6943 "executable" operators (versus the "namespace" operators) cannot
6944 be used at the table level; they can only be used within a control
6947 Implemented the restriction on the Scope() operator where the
6948 target must already exist in the namespace at the time the
6949 operator is encountered (during ASL compilation). In other words,
6950 forward references are not allowed and Scope() cannot create a new
6951 object. This makes the iASL compiler compatible with other ACPI
6952 implementations and makes the Scope() implementation adhere to the
6955 Fixed a problem where namepath optimization for the Alias operator
6956 was optimizing the wrong path (of the two namepaths.) This caused
6957 a "Missing alias link" error message.
6959 Fixed a problem where an "unknown reserved name" warning could be
6960 incorrectly generated for names like "_SB" when the trailing
6961 underscore is not used in the original ASL.
6963 Fixed a problem where the reserved name check did not handle
6964 NamePaths with multiple NameSegs correctly. The first nameseg of
6965 the NamePath was examined instead of the last NameSeg.
6968 ----------------------------------------
6970 02 October 2002. Summary of changes for this release.
6973 1) ACPI CA Core Subsystem version 20021002:
6975 Fixed a problem where a store/copy of a string to an existing
6976 string did not always set the string length properly in the String
6979 Fixed a reported problem with the ToString operator where the
6980 behavior was identical to the ToHexString operator instead of just
6981 simply converting a raw buffer to a string data type.
6983 Fixed a problem where CopyObject and the other "explicit"
6984 conversion operators were not updating the internal namespace node
6985 type as part of the store operation.
6987 Fixed a memory leak during implicit source operand conversion
6988 where the original object was not deleted if it was converted to a
6989 new object of a different type.
6991 Enhanced error messages for all problems associated with namespace
6992 lookups. Common procedure generates and prints the lookup name as
6993 well as the formatted status.
6995 Completed implementation of a new design for the Alias support
6996 within the namespace. The existing design did not handle the case
6997 where a new object was assigned to one of the two names due to the
6998 use of an explicit conversion operator, resulting in the two names
6999 pointing to two different objects. The new design simply points
7000 the Alias name to the original name node - not to the object.
7001 This results in a level of indirection that must be handled in the
7002 name resolution mechanism.
7004 Code and Data Size: Current core subsystem library sizes are shown
7005 below. These are the code and data sizes for the acpica.lib
7006 produced by the Microsoft Visual C++ 6.0 compiler, and these
7007 values do not include any ACPI driver or OSPM code. The debug
7008 version of the code includes the debug output trace mechanism and
7009 has a larger code and data size. Note that these values will vary
7010 depending on the efficiency of the compiler and the compiler
7011 options used during generation.
7014 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
7015 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
7017 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
7018 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
7023 Initialize thermal driver's timer before it is used. (Knut
7026 Allow handling negative celsius values. (Kochi Takayoshi)
7028 Fix thermal management and make trip points. R/W (Pavel Machek)
7030 Fix /proc/acpi/sleep. (P. Christeas)
7032 IA64 fixes. (David Mosberger)
7034 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
7036 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
7040 3) iASL Compiler/Disassembler
7042 Clarified some warning/error messages.
7045 ----------------------------------------
7046 18 September 2002. Summary of changes for this release.
7049 1) ACPI CA Core Subsystem version 20020918:
7051 Fixed a reported problem with reference chaining (via the Index()
7052 and RefOf() operators) in the ObjectType() and SizeOf() operators.
7053 The definition of these operators includes the dereferencing of
7054 all chained references to return information on the base object.
7056 Fixed a problem with stores to indexed package elements - the
7057 existing code would not complete the store if an "implicit
7058 conversion" was not performed. In other words, if the existing
7059 object (package element) was to be replaced completely, the code
7060 didn't handle this case.
7062 Relaxed typechecking on the ASL "Scope" operator to allow the
7063 target name to refer to an object of type Integer, String, or
7064 Buffer, in addition to the scoping object types (Device,
7065 predefined Scopes, Processor, PowerResource, and ThermalZone.)
7066 This allows existing AML code that has workarounds for a bug in
7067 Windows to function properly. A warning is issued, however. This
7068 affects both the AML interpreter and the iASL compiler. Below is
7069 an example of this type of ASL code:
7075 Fixed some reported problems with 64-bit integer support in the
7076 local implementation of C library functions (clib.c)
7081 Use ACPI fix map region instead of IOAPIC region, since it is
7082 undefined in non-SMP.
7084 Ensure that the SCI has the proper polarity and trigger, even on
7085 systems that do not have an interrupt override entry in the MADT.
7087 2.5 big driver reorganization (Pat Mochel)
7089 Use early table mapping code from acpitable.c (Andi Kleen)
7091 New blacklist entries (Andi Kleen)
7093 Blacklist improvements. Split blacklist code out into a separate
7094 file. Move checking the blacklist to very early. Previously, we
7095 would use ACPI tables, and then halfway through init, check the
7096 blacklist -- too late. Now, it's early enough to completely fall-
7100 3) iASL Compiler/Disassembler version 20020918:
7102 Fixed a problem where the typechecking code didn't know that an
7103 alias could point to a method. In other words, aliases were not
7104 being dereferenced during typechecking.
7107 ----------------------------------------
7108 29 August 2002. Summary of changes for this release.
7110 1) ACPI CA Core Subsystem Version 20020829:
7112 If the target of a Scope() operator already exists, it must be an
7113 object type that actually opens a scope -- such as a Device,
7114 Method, Scope, etc. This is a fatal runtime error. Similar error
7115 check has been added to the iASL compiler also.
7117 Tightened up the namespace load to disallow multiple names in the
7118 same scope. This previously was allowed if both objects were of
7119 the same type. (i.e., a lookup was the same as entering a new
7125 Ensure that the ACPI interrupt has the proper trigger and
7128 local_irq_disable is extraneous. (Matthew Wilcox)
7130 Make "acpi=off" actually do what it says, and not use the ACPI
7131 interpreter *or* the tables.
7133 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
7137 3) iASL Compiler/Disassembler Version 20020829:
7139 Implemented namepath optimization for name declarations. For
7140 example, a declaration like "Method (\_SB_.ABCD)" would get
7141 optimized to "Method (ABCD)" if the declaration is within the
7142 \_SB_ scope. This optimization is in addition to the named
7143 reference path optimization first released in the previous
7144 version. This would seem to complete all possible optimizations
7145 for namepaths within the ASL/AML.
7147 If the target of a Scope() operator already exists, it must be an
7148 object type that actually opens a scope -- such as a Device,
7151 Implemented a check and warning for unreachable code in the same
7152 block below a Return() statement.
7154 Fixed a problem where the listing file was not generated if the
7155 compiler aborted if the maximum error count was exceeded (200).
7157 Fixed a problem where the typechecking of method return values was
7158 broken. This includes the check for a return value when the
7159 method is invoked as a TermArg (a return value is expected.)
7161 Fixed a reported problem where EOF conditions during a quoted
7162 string or comment caused a fault.
7165 ----------------------------------------
7166 15 August 2002. Summary of changes for this release.
7168 1) ACPI CA Core Subsystem Version 20020815:
7170 Fixed a reported problem where a Store to a method argument that
7171 contains a reference did not perform the indirect store correctly.
7172 This problem was created during the conversion to the new
7173 reference object model - the indirect store to a method argument
7174 code was not updated to reflect the new model.
7176 Reworked the ACPI mode change code to better conform to ACPI 2.0,
7177 handle corner cases, and improve code legibility (Kochi Takayoshi)
7179 Fixed a problem with the pathname parsing for the carat (^)
7180 prefix. The heavy use of the carat operator by the new namepath
7181 optimization in the iASL compiler uncovered a problem with the AML
7182 interpreter handling of this prefix. In the case where one or
7183 more carats precede a single nameseg, the nameseg was treated as
7184 standalone and the search rule (to root) was inadvertently
7185 applied. This could cause both the iASL compiler and the
7186 interpreter to find the wrong object or to miss the error that
7187 should occur if the object does not exist at that exact pathname.
7189 Found and fixed the problem where the HP Pavilion DSDT would not
7190 load. This was a relatively minor tweak to the table loading code
7191 (a problem caused by the unexpected encounter with a method
7192 invocation not within a control method), but it does not solve the
7193 overall issue of the execution of AML code at the table level.
7194 This investigation is still ongoing.
7196 Code and Data Size: Current core subsystem library sizes are shown
7197 below. These are the code and data sizes for the acpica.lib
7198 produced by the Microsoft Visual C++ 6.0 compiler, and these
7199 values do not include any ACPI driver or OSPM code. The debug
7200 version of the code includes the debug output trace mechanism and
7201 has a larger code and data size. Note that these values will vary
7202 depending on the efficiency of the compiler and the compiler
7203 options used during generation.
7206 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
7207 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
7209 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
7210 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
7215 Remove redundant slab.h include (Brad Hards)
7217 Fix several bugs in thermal.c (Herbert Nachtnebel)
7219 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
7221 Change acpi_system_suspend to use updated irq functions (Pavel
7224 Export acpi_get_firmware_table (Matthew Wilcox)
7226 Use proper root proc entry for ACPI (Kochi Takayoshi)
7228 Fix early-boot table parsing (Bjorn Helgaas)
7231 3) iASL Compiler/Disassembler
7233 Reworked the compiler options to make them more consistent and to
7234 use two-letter options where appropriate. We were running out of
7235 sensible letters. This may break some makefiles, so check the
7236 current options list by invoking the compiler with no parameters.
7238 Completed the design and implementation of the ASL namepath
7239 optimization option for the compiler. This option optimizes all
7240 references to named objects to the shortest possible path. The
7241 first attempt tries to utilize a single nameseg (4 characters) and
7242 the "search-to-root" algorithm used by the interpreter. If that
7243 cannot be used (because either the name is not in the search path
7244 or there is a conflict with another object with the same name),
7245 the pathname is optimized using the carat prefix (usually a
7246 shorter string than specifying the entire path from the root.)
7248 Implemented support to obtain the DSDT from the Windows registry
7249 (when the disassembly option is specified with no input file).
7250 Added this code as the implementation for AcpiOsTableOverride in
7251 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
7252 utility) to scan memory for the DSDT to the AcpiOsTableOverride
7253 function in the DOS OSL to make the disassembler truly OS
7256 Implemented a new option to disassemble and compile in one step.
7257 When used without an input filename, this option will grab the
7258 DSDT from the local machine, disassemble it, and compile it in one
7261 Added a warning message for invalid escapes (a backslash followed
7262 by any character other than the allowable escapes). This catches
7263 the quoted string error "\_SB_" (which should be "\\_SB_" ).
7265 Also, there are numerous instances in the ACPI specification where
7268 Added a compiler option to disable all optimizations. This is
7269 basically the "compatibility mode" because by using this option,
7270 the AML code will come out exactly the same as other ASL
7273 Added error messages for incorrectly ordered dependent resource
7274 functions. This includes: missing EndDependentFn macro at end of
7275 dependent resource list, nested dependent function macros (both
7276 start and end), and missing StartDependentFn macro. These are
7277 common errors that should be caught at compile time.
7279 Implemented _OSI support for the disassembler and compiler. _OSI
7280 must be included in the namespace for proper disassembly (because
7281 the disassembler must know the number of arguments.)
7283 Added an "optimization" message type that is optional (off by
7284 default). This message is used for all optimizations - including
7285 constant folding, integer optimization, and namepath optimization.
7287 ----------------------------------------
7288 25 July 2002. Summary of changes for this release.
7291 1) ACPI CA Core Subsystem Version 20020725:
7293 The AML Disassembler has been enhanced to produce compilable ASL
7294 code and has been integrated into the iASL compiler (see below) as
7295 well as the single-step disassembly for the AML debugger and the
7296 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
7297 resource templates and macros are fully supported. The
7298 disassembler has been tested on over 30 different AML files,
7299 producing identical AML when the resulting disassembled ASL file
7300 is recompiled with the same ASL compiler.
7302 Modified the Resource Manager to allow zero interrupts and zero
7303 dma channels during the GetCurrentResources call. This was
7304 causing problems on some platforms.
7306 Added the AcpiOsRedirectOutput interface to the OSL to simplify
7307 output redirection for the AcpiOsPrintf and AcpiOsVprintf
7310 Code and Data Size: Current core subsystem library sizes are shown
7311 below. These are the code and data sizes for the acpica.lib
7312 produced by the Microsoft Visual C++ 6.0 compiler, and these
7313 values do not include any ACPI driver or OSPM code. The debug
7314 version of the code includes the debug output trace mechanism and
7315 has a larger code and data size. Note that these values will vary
7316 depending on the efficiency of the compiler and the compiler
7317 options used during generation.
7320 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7321 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7323 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
7324 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
7329 Fixed a panic in the EC driver (Dominik Brodowski)
7331 Implemented checksum of the R/XSDT itself during Linux table scan
7337 The AML disassembler is integrated into the compiler. The "-d"
7338 option invokes the disassembler to completely disassemble an
7339 input AML file, producing as output a text ASL file with the
7340 extension ".dsl" (to avoid name collisions with existing .asl
7341 source files.) A future enhancement will allow the disassembler
7342 to obtain the BIOS DSDT from the registry under Windows.
7344 Fixed a problem with the VendorShort and VendorLong resource
7345 descriptors where an invalid AML sequence was created.
7347 Implemented a fix for BufferData term in the ASL parser. It was
7348 inadvertently defined twice, allowing invalid syntax to pass and
7349 causing reduction conflicts.
7351 Fixed a problem where the Ones opcode could get converted to a
7352 value of zero if "Ones" was used where a byte, word or dword value
7353 was expected. The 64-bit value is now truncated to the correct
7354 size with the correct value.
7358 ----------------------------------------
7359 02 July 2002. Summary of changes for this release.
7362 1) ACPI CA Core Subsystem Version 20020702:
7364 The Table Manager code has been restructured to add several new
7365 features. Tables that are not required by the core subsystem
7366 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
7367 validated in any way and are returned from AcpiGetFirmwareTable if
7368 requested. The AcpiOsTableOverride interface is now called for
7369 each table that is loaded by the subsystem in order to allow the
7370 host to override any table it chooses. Previously, only the DSDT
7371 could be overridden. Added one new files, tbrsdt.c and
7374 Fixed a problem with the conversion of internal package objects to
7375 external objects (when a package is returned from a control
7376 method.) The return buffer length was set to zero instead of the
7377 proper length of the package object.
7379 Fixed a reported problem with the use of the RefOf and DeRefOf
7380 operators when passing reference arguments to control methods. A
7381 new type of Reference object is used internally for references
7382 produced by the RefOf operator.
7384 Added additional error messages in the Resource Manager to explain
7385 AE_BAD_DATA errors when they occur during resource parsing.
7387 Split the AcpiEnableSubsystem into two primitives to enable a
7388 finer granularity initialization sequence. These two calls should
7389 be called in this order: AcpiEnableSubsystem (flags),
7390 AcpiInitializeObjects (flags). The flags parameter remains the
7396 Updated the ACPI utilities module to understand the new style of
7397 fully resolved package objects that are now returned from the core
7398 subsystem. This eliminates errors of the form:
7400 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
7401 acpi_utils-0430 [145] acpi_evaluate_reference:
7402 Invalid element in package (not a device reference)
7404 The method evaluation utility uses the new buffer allocation
7405 scheme instead of calling AcpiEvaluate Object twice.
7407 Added support for ECDT. This allows the use of the Embedded
7409 Controller before the namespace has been fully initialized, which
7410 is necessary for ACPI 2.0 support, and for some laptops to
7411 initialize properly. (Laptops using ECDT are still rare, so only
7412 limited testing was performed of the added functionality.)
7414 Fixed memory leaks in the EC driver.
7416 Eliminated a brittle code structure in acpi_bus_init().
7418 Eliminated the acpi_evaluate() helper function in utils.c. It is
7419 no longer needed since acpi_evaluate_object can optionally
7420 allocate memory for the return object.
7422 Implemented fix for keyboard hang when getting battery readings on
7423 some systems (Stephen White)
7425 PCI IRQ routing update (Dominik Brodowski)
7427 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
7430 ----------------------------------------
7431 11 June 2002. Summary of changes for this release.
7434 1) ACPI CA Core Subsystem Version 20020611:
7436 Fixed a reported problem where constants such as Zero and One
7437 appearing within _PRT packages were not handled correctly within
7438 the resource manager code. Originally reported against the ASL
7439 compiler because the code generator now optimizes integers to
7440 their minimal AML representation (i.e. AML constants if possible.)
7441 The _PRT code now handles all AML constant opcodes correctly
7442 (Zero, One, Ones, Revision).
7444 Fixed a problem with the Concatenate operator in the AML
7445 interpreter where a buffer result object was incorrectly marked as
7446 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
7448 All package sub-objects are now fully resolved before they are
7449 returned from the external ACPI interfaces. This means that name
7450 strings are resolved to object handles, and constant operators
7451 (Zero, One, Ones, Revision) are resolved to Integers.
7453 Implemented immediate resolution of the AML Constant opcodes
7454 (Zero, One, Ones, Revision) to Integer objects upon detection
7455 within the AML stream. This has simplified and reduced the
7456 generated code size of the subsystem by eliminating about 10
7457 switch statements for these constants (which previously were
7458 contained in Reference objects.) The complicating issues are that
7459 the Zero opcode is used as a "placeholder" for unspecified
7460 optional target operands and stores to constants are defined to be
7463 Code and Data Size: Current core subsystem library sizes are shown
7464 below. These are the code and data sizes for the acpica.lib
7465 produced by the Microsoft Visual C++ 6.0 compiler, and these
7466 values do not include any ACPI driver or OSPM code. The debug
7467 version of the code includes the debug output trace mechanism and
7468 has a larger code and data size. Note that these values will vary
7469 depending on the efficiency of the compiler and the compiler
7470 options used during generation.
7473 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7474 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7476 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
7477 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
7483 Added preliminary support for obtaining _TRA data for PCI root
7484 bridges (Bjorn Helgaas).
7487 3) iASL Compiler Version X2046:
7489 Fixed a problem where the "_DDN" reserved name was defined to be a
7490 control method with one argument. There are no arguments, and
7491 _DDN does not have to be a control method.
7493 Fixed a problem with the Linux version of the compiler where the
7494 source lines printed with error messages were the wrong lines.
7495 This turned out to be the "LF versus CR/LF" difference between
7496 Windows and Unix. This appears to be the longstanding issue
7497 concerning listing output and error messages.
7499 Fixed a problem with the Linux version of compiler where opcode
7500 names within error messages were wrong. This was caused by a
7501 slight difference in the output of the Flex tool on Linux versus
7504 Fixed a problem with the Linux compiler where the hex output files
7505 contained some garbage data caused by an internal buffer overrun.
7508 ----------------------------------------
7509 17 May 2002. Summary of changes for this release.
7512 1) ACPI CA Core Subsystem Version 20020517:
7514 Implemented a workaround to an BIOS bug discovered on the HP
7515 OmniBook where the FADT revision number and the table size are
7516 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
7517 behavior is to fallback to using only the ACPI 1.0 fields of the
7518 FADT if the table is too small to be a ACPI 2.0 table as claimed
7519 by the revision number. Although this is a BIOS bug, this is a
7520 case where the workaround is simple enough and with no side
7521 effects, so it seemed prudent to add it. A warning message is
7524 Implemented minimum size checks for the fixed-length ACPI tables -
7525 - the FADT and FACS, as well as consistency checks between the
7526 revision number and the table size.
7528 Fixed a reported problem in the table override support where the
7529 new table pointer was incorrectly treated as a physical address
7530 instead of a logical address.
7532 Eliminated the use of the AE_AML_ERROR exception and replaced it
7533 with more descriptive codes.
7535 Fixed a problem where an exception would occur if an ASL Field was
7536 defined with no named Field Units underneath it (used by some
7539 Code and Data Size: Current core subsystem library sizes are shown
7540 below. These are the code and data sizes for the acpica.lib
7541 produced by the Microsoft Visual C++ 6.0 compiler, and these
7542 values do not include any ACPI driver or OSPM code. The debug
7543 version of the code includes the debug output trace mechanism and
7544 has a larger code and data size. Note that these values will vary
7545 depending on the efficiency of the compiler and the compiler
7546 options used during generation.
7549 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7550 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7552 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
7553 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
7559 Much work done on ACPI init (MADT and PCI IRQ routing support).
7560 (Paul D. and Dominik Brodowski)
7562 Fix PCI IRQ-related panic on boot (Sam Revitch)
7564 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
7566 Fix "MHz" typo (Dominik Brodowski)
7568 Fix RTC year 2000 issue (Dominik Brodowski)
7570 Preclude multiple button proc entries (Eric Brunet)
7572 Moved arch-specific code out of include/platform/aclinux.h
7574 3) iASL Compiler Version X2044:
7576 Implemented error checking for the string used in the EISAID macro
7577 (Usually used in the definition of the _HID object.) The code now
7578 strictly enforces the PnP format - exactly 7 characters, 3
7579 uppercase letters and 4 hex digits.
7581 If a raw string is used in the definition of the _HID object
7582 (instead of the EISAID macro), the string must contain all
7583 alphanumeric characters (e.g., "*PNP0011" is not allowed because
7586 Implemented checking for invalid use of ACPI reserved names for
7587 most of the name creation operators (Name, Device, Event, Mutex,
7588 OperationRegion, PowerResource, Processor, and ThermalZone.)
7589 Previously, this check was only performed for control methods.
7591 Implemented an additional check on the Name operator to emit an
7592 error if a reserved name that must be implemented in ASL as a
7593 control method is used. We know that a reserved name must be a
7594 method if it is defined with input arguments.
7596 The warning emitted when a namespace object reference is not found
7597 during the cross reference phase has been changed into an error.
7598 The "External" directive should be used for names defined in other
7602 4) Tools and Utilities
7604 The 16-bit tools (adump16 and aexec16) have been regenerated and
7607 Fixed a problem with the output of both acpidump and adump16 where
7608 the indentation of closing parentheses and brackets was not
7610 aligned properly with the parent block.
7613 ----------------------------------------
7614 03 May 2002. Summary of changes for this release.
7617 1) ACPI CA Core Subsystem Version 20020503:
7619 Added support a new OSL interface that allows the host operating
7621 system software to override the DSDT found in the firmware -
7622 AcpiOsTableOverride. With this interface, the OSL can examine the
7623 version of the firmware DSDT and replace it with a different one
7626 Added new external interfaces for accessing ACPI registers from
7627 device drivers and other system software - AcpiGetRegister and
7628 AcpiSetRegister. This was simply an externalization of the
7629 existing AcpiHwBitRegister interfaces.
7631 Fixed a regression introduced in the previous build where the
7632 ASL/AML CreateField operator always returned an error,
7633 "destination must be a NS Node".
7635 Extended the maximum time (before failure) to successfully enable
7636 ACPI mode to 3 seconds.
7638 Code and Data Size: Current core subsystem library sizes are shown
7639 below. These are the code and data sizes for the acpica.lib
7640 produced by the Microsoft Visual C++ 6.0 compiler, and these
7641 values do not include any ACPI driver or OSPM code. The debug
7642 version of the code includes the debug output trace mechanism and
7643 has a larger code and data size. Note that these values will vary
7644 depending on the efficiency of the compiler and the compiler
7645 options used during generation.
7648 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7649 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7651 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7652 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7657 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
7658 free. While 3 out of 4 of our in-house systems work fine, the last
7659 one still hangs when testing the LAPIC timer.
7661 Renamed many files in 2.5 kernel release to omit "acpi_" from the
7664 Added warning on boot for Presario 711FR.
7666 Sleep improvements (Pavel Machek)
7668 ACPI can now be built without CONFIG_PCI enabled.
7670 IA64: Fixed memory map functions (JI Lee)
7673 3) iASL Compiler Version X2043:
7675 Added support to allow the compiler to be integrated into the MS
7676 VC++ development environment for one-button compilation of single
7677 files or entire projects -- with error-to-source-line mapping.
7679 Implemented support for compile-time constant folding for the
7680 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
7681 specification. This allows the ASL writer to use expressions
7682 instead of Integer/Buffer/String constants in terms that must
7683 evaluate to constants at compile time and will also simplify the
7684 emitted AML in any such sub-expressions that can be folded
7685 (evaluated at compile-time.) This increases the size of the
7686 compiler significantly because a portion of the ACPI CA AML
7687 interpreter is included within the compiler in order to pre-
7688 evaluate constant expressions.
7691 Fixed a problem with the "Unicode" ASL macro that caused the
7692 compiler to fault. (This macro is used in conjunction with the
7693 _STR reserved name.)
7695 Implemented an AML opcode optimization to use the Zero, One, and
7696 Ones opcodes where possible to further reduce the size of integer
7697 constants and thus reduce the overall size of the generated AML
7700 Implemented error checking for new reserved terms for ACPI version
7703 Implemented the -qr option to display the current list of ACPI
7704 reserved names known to the compiler.
7706 Implemented the -qc option to display the current list of ASL
7707 operators that are allowed within constant expressions and can
7708 therefore be folded at compile time if the operands are constants.
7713 Updated the Programmer's Reference for new interfaces, data types,
7714 and memory allocation model options.
7716 Updated the iASL Compiler User Reference to apply new format and
7717 add information about new features and options.
7719 ----------------------------------------
7720 19 April 2002. Summary of changes for this release.
7722 1) ACPI CA Core Subsystem Version 20020419:
7724 The source code base for the Core Subsystem has been completely
7725 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
7726 versions. The Lint option files used are included in the
7727 /acpi/generate/lint directory.
7729 Implemented enhanced status/error checking across the entire
7730 Hardware manager subsystem. Any hardware errors (reported from
7731 the OSL) are now bubbled up and will abort a running control
7735 Fixed a problem where the per-ACPI-table integer width (32 or 64)
7736 was stored only with control method nodes, causing a fault when
7737 non-control method code was executed during table loading. The
7738 solution implemented uses a global variable to indicate table
7739 width across the entire ACPI subsystem. Therefore, ACPI CA does
7740 not support mixed integer widths across different ACPI tables
7743 Fixed a problem where NULL extended fields (X fields) in an ACPI
7744 2.0 ACPI FADT caused the table load to fail. Although the
7745 existing ACPI specification is a bit fuzzy on this topic, the new
7746 behavior is to fall back on a ACPI 1.0 field if the corresponding
7747 ACPI 2.0 X field is zero (even though the table revision indicates
7748 a full ACPI 2.0 table.) The ACPI specification will be updated to
7751 Fixed a problem with the SystemMemory operation region handler
7752 where memory was always accessed byte-wise even if the AML-
7753 specified access width was larger than a byte. This caused
7754 problems on systems with memory-mapped I/O. Memory is now
7755 accessed with the width specified. On systems that do not support
7756 non-aligned transfers, a check is made to guarantee proper address
7757 alignment before proceeding in order to avoid an AML-caused
7758 alignment fault within the kernel.
7761 Fixed a problem with the ExtendedIrq resource where only one byte
7762 of the 4-byte Irq field was extracted.
7764 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
7765 function was out of date and required a rewrite.
7767 Code and Data Size: Current core subsystem library sizes are shown
7768 below. These are the code and data sizes for the acpica.lib
7769 produced by the Microsoft Visual C++ 6.0 compiler, and these
7770 values do not include any ACPI driver or OSPM code. The debug
7771 version of the code includes the debug output trace mechanism and
7772 has a larger code and data size. Note that these values will vary
7773 depending on the efficiency of the compiler and the compiler
7774 options used during generation.
7777 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7778 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7780 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7781 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7786 PCI IRQ routing fixes (Dominik Brodowski)
7789 3) iASL Compiler Version X2042:
7791 Implemented an additional compile-time error check for a field
7792 unit whose size + minimum access width would cause a run-time
7793 access beyond the end-of-region. Previously, only the field size
7796 The Core subsystem and iASL compiler now share a common parse
7797 object in preparation for compile-time evaluation of the type
7798 3/4/5 ASL operators.
7801 ----------------------------------------
7802 Summary of changes for this release: 03_29_02
7804 1) ACPI CA Core Subsystem Version 20020329:
7806 Implemented support for late evaluation of TermArg operands to
7807 Buffer and Package objects. This allows complex expressions to be
7808 used in the declarations of these object types.
7810 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
7811 1.0, if the field was larger than 32 bits, it was returned as a
7812 buffer - otherwise it was returned as an integer. In ACPI 2.0,
7813 the field is returned as a buffer only if the field is larger than
7814 64 bits. The TableRevision is now considered when making this
7815 conversion to avoid incompatibility with existing ASL code.
7817 Implemented logical addressing for AcpiOsGetRootPointer. This
7818 allows an RSDP with either a logical or physical address. With
7819 this support, the host OS can now override all ACPI tables with
7820 one logical RSDP. Includes implementation of "typed" pointer
7821 support to allow a common data type for both physical and logical
7822 pointers internally. This required a change to the
7823 AcpiOsGetRootPointer interface.
7825 Implemented the use of ACPI 2.0 Generic Address Structures for all
7826 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
7827 mapped I/O for these ACPI features.
7829 Initialization now ignores not only non-required tables (All
7830 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
7831 not validate the table headers of unrecognized tables.
7833 Fixed a problem where a notify handler could only be
7834 installed/removed on an object of type Device. All "notify"
7836 objects are now supported -- Devices, Processor, Power, and
7839 Removed most verbosity from the ACPI_DB_INFO debug level. Only
7840 critical information is returned when this debug level is enabled.
7842 Code and Data Size: Current core subsystem library sizes are shown
7843 below. These are the code and data sizes for the acpica.lib
7844 produced by the Microsoft Visual C++ 6.0 compiler, and these
7845 values do not include any ACPI driver or OSPM code. The debug
7846 version of the code includes the debug output trace mechanism and
7847 has a larger code and data size. Note that these values will vary
7848 depending on the efficiency of the compiler and the compiler
7849 options used during generation.
7852 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
7853 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
7855 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7856 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7861 The processor driver (acpi_processor.c) now fully supports ACPI
7862 2.0-based processor performance control (e.g. Intel(R)
7863 SpeedStep(TM) technology) Note that older laptops that only have
7864 the Intel "applet" interface are not supported through this. The
7865 'limit' and 'performance' interface (/proc) are fully functional.
7866 [Note that basic policy for controlling performance state
7867 transitions will be included in the next version of ospmd.] The
7868 idle handler was modified to more aggressively use C2, and PIIX4
7869 errata handling underwent a complete overhaul (big thanks to
7872 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
7873 based devices in the ACPI namespace are now dynamically bound
7874 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
7875 This allows, among other things, ACPI to resolve bus numbers for
7876 subordinate PCI bridges.
7878 Enhanced PCI IRQ routing to get the proper bus number for _PRT
7879 entries defined underneath PCI bridges.
7881 Added IBM 600E to bad bios list due to invalid _ADR value for
7882 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
7884 In the process of adding full MADT support (e.g. IOAPIC) for IA32
7885 (acpi.c, mpparse.c) -- stay tuned.
7887 Added back visual differentiation between fixed-feature and
7888 control-method buttons in dmesg. Buttons are also subtyped (e.g.
7889 button/power/PWRF) to simplify button identification.
7891 We no longer use -Wno-unused when compiling debug. Please ignore
7892 any "_THIS_MODULE defined but not used" messages.
7894 Can now shut down the system using "magic sysrq" key.
7897 3) iASL Compiler version 2041:
7899 Fixed a problem where conversion errors for hex/octal/decimal
7900 constants were not reported.
7902 Implemented a fix for the General Register template Address field.
7903 This field was 8 bits when it should be 64.
7905 Fixed a problem where errors/warnings were no longer being emitted
7906 within the listing output file.
7908 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
7909 exactly 4 characters, alphanumeric only.
7914 ----------------------------------------
7915 Summary of changes for this release: 03_08_02
7918 1) ACPI CA Core Subsystem Version 20020308:
7920 Fixed a problem with AML Fields where the use of the "AccessAny"
7921 keyword could cause an interpreter error due to attempting to read
7922 or write beyond the end of the parent Operation Region.
7924 Fixed a problem in the SystemMemory Operation Region handler where
7925 an attempt was made to map memory beyond the end of the region.
7926 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
7927 errors on some Linux systems.
7929 Fixed a problem where the interpreter/namespace "search to root"
7930 algorithm was not functioning for some object types. Relaxed the
7931 internal restriction on the search to allow upsearches for all
7932 external object types as well as most internal types.
7937 We now use safe_halt() macro versus individual calls to sti | hlt.
7939 Writing to the processor limit interface should now work. "echo 1"
7940 will increase the limit, 2 will decrease, and 0 will reset to the
7947 Fixed segfault on Linux version.
7950 ----------------------------------------
7951 Summary of changes for this release: 02_25_02
7953 1) ACPI CA Core Subsystem:
7956 Fixed a problem where the GPE bit masks were not initialized
7957 properly, causing erratic GPE behavior.
7959 Implemented limited support for multiple calling conventions. The
7960 code can be generated with either the VPL (variable parameter
7961 list, or "C") convention, or the FPL (fixed parameter list, or
7962 "Pascal") convention. The core subsystem is about 3.4% smaller
7963 when generated with FPL.
7968 Re-add some /proc/acpi/event functionality that was lost during
7971 Resolved issue with /proc events for fixed-feature buttons showing
7972 up as the system device.
7974 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
7976 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
7978 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
7980 Fixed limit interface & usage to fix bugs with passive cooling
7983 Restructured PRT support.
7986 ----------------------------------------
7987 Summary of changes for this label: 02_14_02
7990 1) ACPI CA Core Subsystem:
7992 Implemented support in AcpiLoadTable to allow loading of FACS and
7995 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
7996 been removed. All 64-bit platforms should be migrated to the ACPI
7997 2.0 tables. The actbl71.h header has been removed from the source
8000 All C macros defined within the subsystem have been prefixed with
8001 "ACPI_" to avoid collision with other system include files.
8003 Removed the return value for the two AcpiOsPrint interfaces, since
8004 it is never used and causes lint warnings for ignoring the return
8007 Added error checking to all internal mutex acquire and release
8008 calls. Although a failure from one of these interfaces is
8009 probably a fatal system error, these checks will cause the
8010 immediate abort of the currently executing method or interface.
8012 Fixed a problem where the AcpiSetCurrentResources interface could
8013 fault. This was a side effect of the deployment of the new memory
8016 Fixed a couple of problems with the Global Lock support introduced
8017 in the last major build. The "common" (1.0/2.0) internal FACS was
8018 being overwritten with the FACS signature and clobbering the
8019 Global Lock pointer. Also, the actual firmware FACS was being
8020 unmapped after construction of the "common" FACS, preventing
8021 access to the actual Global Lock field within it. The "common"
8022 internal FACS is no longer installed as an actual ACPI table; it
8023 is used simply as a global.
8025 Code and Data Size: Current core subsystem library sizes are shown
8026 below. These are the code and data sizes for the acpica.lib
8027 produced by the Microsoft Visual C++ 6.0 compiler, and these
8028 values do not include any ACPI driver or OSPM code. The debug
8029 version of the code includes the debug output trace mechanism and
8030 has a larger code and data size. Note that these values will vary
8031 depending on the efficiency of the compiler and the compiler
8032 options used during generation.
8034 Previous Release (02_07_01)
8035 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
8036 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
8038 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
8039 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
8044 Updated Linux-specific code for core macro and OSL interface
8045 changes described above.
8047 Improved /proc/acpi/event. It now can be opened only once and has
8048 proper poll functionality.
8050 Fixed and restructured power management (acpi_bus).
8052 Only create /proc "view by type" when devices of that class exist.
8054 Fixed "charging/discharging" bug (and others) in acpi_battery.
8056 Improved thermal zone code.
8059 3) ASL Compiler, version X2039:
8062 Implemented the new compiler restriction on ASL String hex/octal
8063 escapes to non-null, ASCII values. An error results if an invalid
8064 value is used. (This will require an ACPI 2.0 specification
8067 AML object labels that are output to the optional C and ASM source
8068 are now prefixed with both the ACPI table signature and table ID
8069 to help guarantee uniqueness within a large BIOS project.
8072 ----------------------------------------
8073 Summary of changes for this label: 02_01_02
8075 1) ACPI CA Core Subsystem:
8077 ACPI 2.0 support is complete in the entire Core Subsystem and the
8078 ASL compiler. All new ACPI 2.0 operators are implemented and all
8079 other changes for ACPI 2.0 support are complete. With
8080 simultaneous code and data optimizations throughout the subsystem,
8081 ACPI 2.0 support has been implemented with almost no additional
8082 cost in terms of code and data size.
8084 Implemented a new mechanism for allocation of return buffers. If
8085 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
8086 be allocated on behalf of the caller. Consolidated all return
8087 buffer validation and allocation to a common procedure. Return
8088 buffers will be allocated via the primary OSL allocation interface
8089 since it appears that a separate pool is not needed by most users.
8090 If a separate pool is required for these buffers, the caller can
8091 still use the original mechanism and pre-allocate the buffer(s).
8093 Implemented support for string operands within the DerefOf
8096 Restructured the Hardware and Event managers to be table driven,
8097 simplifying the source code and reducing the amount of generated
8100 Split the common read/write low-level ACPI register bitfield
8101 procedure into a separate read and write, simplifying the code
8104 Obsoleted the AcpiOsCallocate OSL interface. This interface was
8105 used only a handful of times and didn't have enough critical mass
8106 for a separate interface. Replaced with a common calloc procedure
8109 Fixed a reported problem with the GPE number mapping mechanism
8110 that allows GPE1 numbers to be non-contiguous with GPE0.
8111 Reorganized the GPE information and shrunk a large array that was
8112 originally large enough to hold info for all possible GPEs (256)
8113 to simply large enough to hold all GPEs up to the largest GPE
8114 number on the machine.
8116 Fixed a reported problem with resource structure alignment on 64-
8119 Changed the AcpiEnableEvent and AcpiDisableEvent external
8120 interfaces to not require any flags for the common case of
8121 enabling/disabling a GPE.
8123 Implemented support to allow a "Notify" on a Processor object.
8125 Most TBDs in comments within the source code have been resolved
8129 Fixed a problem in the interpreter where a standalone parent
8130 prefix (^) was not handled correctly in the interpreter and
8133 Removed obsolete and unnecessary GPE save/restore code.
8135 Implemented Field support in the ASL Load operator. This allows a
8136 table to be loaded from a named field, in addition to loading a
8137 table directly from an Operation Region.
8139 Implemented timeout and handle support in the external Global Lock
8142 Fixed a problem in the AcpiDump utility where pathnames were no
8143 longer being generated correctly during the dump of named objects.
8145 Modified the AML debugger to give a full display of if/while
8146 predicates instead of just one AML opcode at a time. (The
8147 predicate can have several nested ASL statements.) The old method
8148 was confusing during single stepping.
8150 Code and Data Size: Current core subsystem library sizes are shown
8151 below. These are the code and data sizes for the acpica.lib
8152 produced by the Microsoft Visual C++ 6.0 compiler, and these
8153 values do not include any ACPI driver or OSPM code. The debug
8154 version of the code includes the debug output trace mechanism and
8155 has a larger code and data size. Note that these values will vary
8156 depending on the efficiency of the compiler and the compiler
8157 options used during generation.
8159 Previous Release (12_18_01)
8160 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
8161 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
8163 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
8164 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
8168 Implemented fix for PIIX reverse throttling errata (Processor
8171 Added new Limit interface (Processor and Thermal drivers)
8173 New thermal policy (Thermal driver)
8175 Many updates to /proc
8177 Battery "low" event support (Battery driver)
8179 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
8181 IA32 - IA64 initialization unification, no longer experimental
8183 Menuconfig options redesigned
8185 3) ASL Compiler, version X2037:
8187 Implemented several new output features to simplify integration of
8188 AML code into firmware: 1) Output the AML in C source code with
8189 labels for each named ASL object. The original ASL source code
8190 is interleaved as C comments. 2) Output the AML in ASM source code
8191 with labels and interleaved ASL source. 3) Output the AML in
8192 raw hex table form, in either C or ASM.
8194 Implemented support for optional string parameters to the
8197 Completed support for embedded escape sequences within string
8198 literals. The compiler now supports all single character escapes
8199 as well as the Octal and Hex escapes. Note: the insertion of a
8200 null byte into a string literal (via the hex/octal escape) causes
8201 the string to be immediately terminated. A warning is issued.
8203 Fixed a problem where incorrect AML was generated for the case
8204 where an ASL namepath consists of a single parent prefix (
8206 ) with no trailing name segments.
8208 The compiler has been successfully generated with a 64-bit C
8214 ----------------------------------------
8215 Summary of changes for this label: 12_18_01
8219 Enhanced blacklist with reason and severity fields. Any table's
8220 signature may now be used to identify a blacklisted system.
8222 Call _PIC control method to inform the firmware which interrupt
8223 model the OS is using. Turn on any disabled link devices.
8225 Cleaned up busmgr /proc error handling (Andreas Dilger)
8227 2) ACPI CA Core Subsystem:
8229 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
8232 Completed implementation of the ACPI 2.0 "Continue",
8233 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
8234 operators. All new ACPI 2.0 operators are now implemented in both
8235 the ASL compiler and the AML interpreter. The only remaining ACPI
8236 2.0 task is support for the String data type in the DerefOf
8237 operator. Fixed a problem with AcquireMutex where the status code
8238 was lost if the caller had to actually wait for the mutex.
8240 Increased the maximum ASL Field size from 64K bits to 4G bits.
8242 Completed implementation of the external Global Lock interfaces --
8243 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
8244 Handler parameters were added.
8246 Completed another pass at removing warnings and issues when
8247 compiling with 64-bit compilers. The code now compiles cleanly
8248 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
8249 add and subtract (diff) macros have changed considerably.
8252 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
8253 64-bit platforms, 32-bits on all others. This type is used
8254 wherever memory allocation and/or the C sizeof() operator is used,
8255 and affects the OSL memory allocation interfaces AcpiOsAllocate
8256 and AcpiOsCallocate.
8258 Implemented sticky user breakpoints in the AML debugger.
8260 Code and Data Size: Current core subsystem library sizes are shown
8261 below. These are the code and data sizes for the acpica.lib
8262 produced by the Microsoft Visual C++ 6.0 compiler, and these
8263 values do not include any ACPI driver or OSPM code. The debug
8264 version of the code includes the debug output trace mechanism and
8265 has a larger code and data size. Note that these values will vary
8266 depending on the efficiency of the compiler and the compiler
8267 options used during generation.
8269 Previous Release (12_05_01)
8270 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
8271 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
8273 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
8274 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
8276 3) ASL Compiler, version X2034:
8278 Now checks for (and generates an error if detected) the use of a
8279 Break or Continue statement without an enclosing While statement.
8282 Successfully generated the compiler with the Intel 64-bit C
8285 ----------------------------------------
8286 Summary of changes for this label: 12_05_01
8288 1) ACPI CA Core Subsystem:
8290 The ACPI 2.0 CopyObject operator is fully implemented. This
8291 operator creates a new copy of an object (and is also used to
8292 bypass the "implicit conversion" mechanism of the Store operator.)
8294 The ACPI 2.0 semantics for the SizeOf operator are fully
8295 implemented. The change is that performing a SizeOf on a
8296 reference object causes an automatic dereference of the object to
8297 tha actual value before the size is evaluated. This behavior was
8298 undefined in ACPI 1.0.
8300 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
8301 have been implemented. The interrupt polarity and mode are now
8304 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
8305 appearing in Package objects were not properly converted to
8306 integers when the internal Package was converted to an external
8307 object (via the AcpiEvaluateObject interface.)
8309 Fixed a problem with the namespace object deletion mechanism for
8310 objects created by control methods. There were two parts to this
8311 problem: 1) Objects created during the initialization phase method
8312 parse were not being deleted, and 2) The object owner ID mechanism
8313 to track objects was broken.
8315 Fixed a problem where the use of the ASL Scope operator within a
8316 control method would result in an invalid opcode exception.
8318 Fixed a problem introduced in the previous label where the buffer
8319 length required for the _PRT structure was not being returned
8322 Code and Data Size: Current core subsystem library sizes are shown
8323 below. These are the code and data sizes for the acpica.lib
8324 produced by the Microsoft Visual C++ 6.0 compiler, and these
8325 values do not include any ACPI driver or OSPM code. The debug
8326 version of the code includes the debug output trace mechanism and
8327 has a larger code and data size. Note that these values will vary
8328 depending on the efficiency of the compiler and the compiler
8329 options used during generation.
8331 Previous Release (11_20_01)
8332 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8333 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8336 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
8337 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
8341 Updated all files to apply cleanly against 2.4.16.
8343 Added basic PCI Interrupt Routing Table (PRT) support for IA32
8344 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
8345 version supports both static and dyanmic PRT entries, but dynamic
8346 entries are treated as if they were static (not yet
8347 reconfigurable). Architecture- specific code to use this data is
8348 absent on IA32 but should be available shortly.
8350 Changed the initialization sequence to start the ACPI interpreter
8351 (acpi_init) prior to initialization of the PCI driver (pci_init)
8352 in init/main.c. This ordering is required to support PRT and
8353 facilitate other (future) enhancement. A side effect is that the
8354 ACPI bus driver and certain device drivers can no longer be loaded
8357 Modified the 'make menuconfig' options to allow PCI Interrupt
8358 Routing support to be included without the ACPI Bus and other
8361 3) ASL Compiler, version X2033:
8363 Fixed some issues with the use of the new CopyObject and
8364 DataTableRegion operators. Both are fully functional.
8366 ----------------------------------------
8367 Summary of changes for this label: 11_20_01
8369 20 November 2001. Summary of changes for this release.
8371 1) ACPI CA Core Subsystem:
8373 Updated Index support to match ACPI 2.0 semantics. Storing a
8374 Integer, String, or Buffer to an Index of a Buffer will store only
8375 the least-significant byte of the source to the Indexed buffer
8376 byte. Multiple writes are not performed.
8378 Fixed a problem where the access type used in an AccessAs ASL
8379 operator was not recorded correctly into the field object.
8381 Fixed a problem where ASL Event objects were created in a
8382 signalled state. Events are now created in an unsignalled state.
8384 The internal object cache is now purged after table loading and
8385 initialization to reduce the use of dynamic kernel memory -- on
8386 the assumption that object use is greatest during the parse phase
8387 of the entire table (versus the run-time use of individual control
8390 ACPI 2.0 variable-length packages are now fully operational.
8392 Code and Data Size: Code and Data optimizations have permitted new
8393 feature development with an actual reduction in the library size.
8394 Current core subsystem library sizes are shown below. These are
8395 the code and data sizes for the acpica.lib produced by the
8396 Microsoft Visual C++ 6.0 compiler, and these values do not include
8397 any ACPI driver or OSPM code. The debug version of the code
8398 includes the debug output trace mechanism and has a larger code
8399 and data size. Note that these values will vary depending on the
8400 efficiency of the compiler and the compiler options used during
8403 Previous Release (11_09_01):
8404 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8405 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8408 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
8409 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
8413 Enhanced the ACPI boot-time initialization code to allow the use
8414 of Local APIC tables for processor enumeration on IA-32, and to
8415 pave the way for a fully MPS-free boot (on SMP systems) in the
8416 near future. This functionality replaces
8417 arch/i386/kernel/acpitables.c, which was introduced in an earlier
8418 2.4.15-preX release. To enable this feature you must add
8419 "acpi_boot=on" to the kernel command line -- see the help entry
8420 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
8423 Restructured the configuration options to allow boot-time table
8424 parsing support without inclusion of the ACPI Interpreter (and
8427 NOTE: This release does not include fixes for the reported events,
8428 power-down, and thermal passive cooling issues (coming soon).
8432 Added additional typechecking for Fields within restricted access
8433 Operation Regions. All fields within EC and CMOS regions must be
8434 declared with ByteAcc. All fields withing SMBus regions must be
8435 declared with the BufferAcc access type.
8437 Fixed a problem where the listing file output of control methods
8438 no longer interleaved the actual AML code with the ASL source
8444 ----------------------------------------
8445 Summary of changes for this label: 11_09_01
8447 1) ACPI CA Core Subsystem:
8449 Implemented ACPI 2.0-defined support for writes to fields with a
8450 Buffer, String, or Integer source operand that is smaller than the
8451 target field. In these cases, the source operand is zero-extended
8452 to fill the target field.
8454 Fixed a problem where a Field starting bit offset (within the
8455 parent operation region) was calculated incorrectly if the
8457 alignment of the field differed from the access width. This
8458 affected CreateWordField, CreateDwordField, CreateQwordField, and
8459 possibly other fields that use the "AccessAny" keyword.
8461 Fixed a problem introduced in the 11_02_01 release where indirect
8462 stores through method arguments did not operate correctly.
8466 Implemented boot-time ACPI table parsing support
8467 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
8468 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
8469 legacy BIOS interfaces (e.g. MPS) for the configuration of system
8470 processors, memory, and interrupts during setup_arch(). Note that
8471 this patch does not include the required architecture-specific
8472 changes required to apply this information -- subsequent patches
8473 will be posted for both IA32 and IA64 to achieve this.
8475 Added low-level sleep support for IA32 platforms, courtesy of Pat
8476 Mochel. This allows IA32 systems to transition to/from various
8477 sleeping states (e.g. S1, S3), although the lack of a centralized
8478 driver model and power-manageable drivers will prevent its
8479 (successful) use on most systems.
8481 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
8482 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
8483 tables" option, etc.
8485 Increased the default timeout for the EC driver from 1ms to 10ms
8486 (1000 cycles of 10us) to try to address AE_TIME errors during EC
8489 ----------------------------------------
8490 Summary of changes for this label: 11_02_01
8492 1) ACPI CA Core Subsystem:
8494 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
8495 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
8498 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
8499 changes to support ACPI 2.0 Qword field access. Read/Write
8500 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
8501 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
8502 the value parameter for the address space handler interface is now
8503 an ACPI_INTEGER. OSL implementations of these interfaces must now
8504 handle the case where the Width parameter is 64.
8506 Index Fields: Fixed a problem where unaligned bit assembly and
8507 disassembly for IndexFields was not supported correctly.
8509 Index and Bank Fields: Nested Index and Bank Fields are now
8510 supported. During field access, a check is performed to ensure
8511 that the value written to an Index or Bank register is not out of
8512 the range of the register. The Index (or Bank) register is
8513 written before each access to the field data. Future support will
8514 include allowing individual IndexFields to be wider than the
8517 Fields: Fixed a problem where the AML interpreter was incorrectly
8518 attempting to write beyond the end of a Field/OpRegion. This was
8519 a boundary case that occurred when a DWORD field was written to a
8520 BYTE access OpRegion, forcing multiple writes and causing the
8521 interpreter to write one datum too many.
8523 Fields: Fixed a problem with Field/OpRegion access where the
8524 starting bit address of a field was incorrectly calculated if the
8525 current access type was wider than a byte (WordAcc, DwordAcc, or
8528 Fields: Fixed a problem where forward references to individual
8529 FieldUnits (individual Field names within a Field definition) were
8530 not resolved during the AML table load.
8532 Fields: Fixed a problem where forward references from a Field
8533 definition to the parent Operation Region definition were not
8534 resolved during the AML table load.
8536 Fields: Duplicate FieldUnit names within a scope are now detected
8537 during AML table load.
8539 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
8540 returned an incorrect name for the root node.
8542 Code and Data Size: Code and Data optimizations have permitted new
8543 feature development with an actual reduction in the library size.
8544 Current core subsystem library sizes are shown below. These are
8545 the code and data sizes for the acpica.lib produced by the
8546 Microsoft Visual C++ 6.0 compiler, and these values do not include
8547 any ACPI driver or OSPM code. The debug version of the code
8548 includes the debug output trace mechanism and has a larger code
8549 and data size. Note that these values will vary depending on the
8550 efficiency of the compiler and the compiler options used during
8553 Previous Release (10_18_01):
8554 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8555 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8558 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
8559 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
8563 Improved /proc processor output (Pavel Machek) Re-added
8564 MODULE_LICENSE("GPL") to all modules.
8566 3) ASL Compiler version X2030:
8568 Duplicate FieldUnit names within a scope are now detected and
8573 Programmer Reference updated to reflect OSL and address space
8574 handler interface changes described above.
8576 ----------------------------------------
8577 Summary of changes for this label: 10_18_01
8579 ACPI CA Core Subsystem:
8581 Fixed a problem with the internal object reference count mechanism
8582 that occasionally caused premature object deletion. This resolves
8583 all of the outstanding problem reports where an object is deleted
8584 in the middle of an interpreter evaluation. Although this problem
8585 only showed up in rather obscure cases, the solution to the
8586 problem involved an adjustment of all reference counts involving
8587 objects attached to namespace nodes.
8589 Fixed a problem with Field support in the interpreter where
8590 writing to an aligned field whose length is an exact multiple (2
8591 or greater) of the field access granularity would cause an attempt
8592 to write beyond the end of the field.
8594 The top level AML opcode execution functions within the
8595 interpreter have been renamed with a more meaningful and
8596 consistent naming convention. The modules exmonad.c and
8597 exdyadic.c were eliminated. New modules are exoparg1.c,
8598 exoparg2.c, exoparg3.c, and exoparg6.c.
8600 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
8602 Fixed a problem where the AML debugger was causing some internal
8603 objects to not be deleted during subsystem termination.
8605 Fixed a problem with the external AcpiEvaluateObject interface
8606 where the subsystem would fault if the named object to be
8607 evaluated refered to a constant such as Zero, Ones, etc.
8609 Fixed a problem with IndexFields and BankFields where the
8610 subsystem would fault if the index, data, or bank registers were
8611 not defined in the same scope as the field itself.
8613 Added printf format string checking for compilers that support
8614 this feature. Corrected more than 50 instances of issues with
8615 format specifiers within invocations of ACPI_DEBUG_PRINT
8616 throughout the core subsystem code.
8618 The ASL "Revision" operator now returns the ACPI support level
8619 implemented in the core - the value "2" since the ACPI 2.0 support
8620 is more than 50% implemented.
8622 Enhanced the output of the AML debugger "dump namespace" command
8623 to output in a more human-readable form.
8625 Current core subsystem library code sizes are shown below. These
8627 are the code and data sizes for the acpica.lib produced by the
8628 Microsoft Visual C++ 6.0 compiler, and these values do not include
8629 any ACPI driver or OSPM code. The debug version of the code
8630 includes the full debug trace mechanism -- leading to a much
8632 larger code and data size. Note that these values will vary
8633 depending on the efficiency of the compiler and the compiler
8634 options used during generation.
8636 Previous Label (09_20_01):
8637 Non-Debug Version: 65K Code, 5K Data, 70K Total
8638 Debug Version: 138K Code, 58K Data, 196K Total
8642 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8643 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8647 Implemented a "Bad BIOS Blacklist" to track machines that have
8648 known ASL/AML problems.
8650 Enhanced the /proc interface for the thermal zone driver and added
8651 support for _HOT (the critical suspend trip point). The 'info'
8652 file now includes threshold/policy information, and allows setting
8653 of _SCP (cooling preference) and _TZP (polling frequency) values
8654 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
8655 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
8656 preference to the passive/quiet mode (if supported by the ASL).
8658 Implemented a workaround for a gcc bug that resuted in an OOPs
8659 when loading the control method battery driver.
8661 ----------------------------------------
8662 Summary of changes for this label: 09_20_01
8664 ACPI CA Core Subsystem:
8666 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
8667 modified to allow individual GPE levels to be flagged as wake-
8668 enabled (i.e., these GPEs are to remain enabled when the platform
8671 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
8672 support wake-enabled GPEs. This means that upon entering the
8673 sleep state, all GPEs that are not wake-enabled are disabled.
8674 When leaving the sleep state, these GPEs are reenabled.
8676 A local double-precision divide/modulo module has been added to
8677 enhance portability to OS kernels where a 64-bit math library is
8678 not available. The new module is "utmath.c".
8680 Several optimizations have been made to reduce the use of CPU
8681 stack. Originally over 2K, the maximum stack usage is now below
8682 2K at 1860 bytes (1.82k)
8684 Fixed a problem with the AcpiGetFirmwareTable interface where the
8685 root table pointer was not mapped into a logical address properly.
8687 Fixed a problem where a NULL pointer was being dereferenced in the
8688 interpreter code for the ASL Notify operator.
8690 Fixed a problem where the use of the ASL Revision operator
8691 returned an error. This operator now returns the current version
8692 of the ACPI CA core subsystem.
8694 Fixed a problem where objects passed as control method parameters
8695 to AcpiEvaluateObject were always deleted at method termination.
8696 However, these objects may end up being stored into the namespace
8697 by the called method. The object reference count mechanism was
8698 applied to these objects instead of a force delete.
8700 Fixed a problem where static strings or buffers (contained in the
8701 AML code) that are declared as package elements within the ASL
8702 code could cause a fault because the interpreter would attempt to
8703 delete them. These objects are now marked with the "static
8704 object" flag to prevent any attempt to delete them.
8706 Implemented an interpreter optimization to use operands directly
8707 from the state object instead of extracting the operands to local
8708 variables. This reduces stack use and code size, and improves
8711 The module exxface.c was eliminated as it was an unnecessary extra
8714 Current core subsystem library code sizes are shown below. These
8715 are the code and data sizes for the acpica.lib produced by the
8716 Microsoft Visual C++ 6.0 compiler, and these values do not include
8717 any ACPI driver or OSPM code. The debug version of the code
8718 includes the full debug trace mechanism -- leading to a much
8719 larger code and data size. Note that these values will vary
8720 depending on the efficiency of the compiler and the compiler
8721 options used during generation.
8723 Non-Debug Version: 65K Code, 5K Data, 70K Total
8724 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
8725 Total (Previously 195K)
8729 Support for ACPI 2.0 64-bit integers has been added. All ACPI
8730 Integer objects are now 64 bits wide
8732 All Acpi data types and structures are now in lower case. Only
8733 Acpi macros are upper case for differentiation.
8737 Changes to the external interfaces as described above.
8739 ----------------------------------------
8740 Summary of changes for this label: 08_31_01
8742 ACPI CA Core Subsystem:
8744 A bug with interpreter implementation of the ASL Divide operator
8745 was found and fixed. The implicit function return value (not the
8746 explicit store operands) was returning the remainder instead of
8747 the quotient. This was a longstanding bug and it fixes several
8748 known outstanding issues on various platforms.
8750 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
8751 been further optimized for size. There are 700 invocations of the
8752 DEBUG_PRINT macro alone, so each optimization reduces the size of
8753 the debug version of the subsystem significantly.
8755 A stack trace mechanism has been implemented. The maximum stack
8756 usage is about 2K on 32-bit platforms. The debugger command "stat
8757 stack" will display the current maximum stack usage.
8759 All public symbols and global variables within the subsystem are
8760 now prefixed with the string "Acpi". This keeps all of the
8761 symbols grouped together in a kernel map, and avoids conflicts
8762 with other kernel subsystems.
8764 Most of the internal fixed lookup tables have been moved into the
8765 code segment via the const operator.
8767 Several enhancements have been made to the interpreter to both
8768 reduce the code size and improve performance.
8770 Current core subsystem library code sizes are shown below. These
8771 are the code and data sizes for the acpica.lib produced by the
8772 Microsoft Visual C++ 6.0 compiler, and these values do not include
8773 any ACPI driver or OSPM code. The debug version of the code
8774 includes the full debug trace mechanism which contains over 700
8775 invocations of the DEBUG_PRINT macro, 500 function entry macro
8776 invocations, and over 900 function exit macro invocations --
8777 leading to a much larger code and data size. Note that these
8778 values will vary depending on the efficiency of the compiler and
8779 the compiler options used during generation.
8781 Non-Debug Version: 64K Code, 5K Data, 69K Total
8782 Debug Version: 137K Code, 58K Data, 195K Total
8786 Implemented wbinvd() macro, pending a kernel-wide definition.
8788 Fixed /proc/acpi/event to handle poll() and short reads.
8790 ASL Compiler, version X2026:
8792 Fixed a problem introduced in the previous label where the AML
8794 code emitted for package objects produced packages with zero
8797 ----------------------------------------
8798 Summary of changes for this label: 08_16_01
8800 ACPI CA Core Subsystem:
8802 The following ACPI 2.0 ASL operators have been implemented in the
8803 AML interpreter (These are already supported by the Intel ASL
8804 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
8805 ToBuffer. Support for 64-bit AML constants is implemented in the
8806 AML parser, debugger, and disassembler.
8808 The internal memory tracking mechanism (leak detection code) has
8809 been upgraded to reduce the memory overhead (a separate tracking
8810 block is no longer allocated for each memory allocation), and now
8811 supports all of the internal object caches.
8813 The data structures and code for the internal object caches have
8814 been coelesced and optimized so that there is a single cache and
8815 memory list data structure and a single group of functions that
8816 implement generic cache management. This has reduced the code
8817 size in both the debug and release versions of the subsystem.
8819 The DEBUG_PRINT macro(s) have been optimized for size and replaced
8820 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
8821 different, because it generates a single call to an internal
8822 function. This results in a savings of about 90 bytes per
8823 invocation, resulting in an overall code and data savings of about
8824 16% in the debug version of the subsystem.
8828 Fixed C3 disk corruption problems and re-enabled C3 on supporting
8831 Integrated low-level sleep code by Patrick Mochel.
8833 Further tweaked source code Linuxization.
8839 Support for ACPI 2.0 variable length packages is fixed/completed.
8841 Fixed a problem where the optional length parameter for the ACPI
8842 2.0 ToString operator.
8844 Fixed multiple extraneous error messages when a syntax error is
8845 detected within the declaration line of a control method.
8847 ----------------------------------------
8848 Summary of changes for this label: 07_17_01
8850 ACPI CA Core Subsystem:
8852 Added a new interface named AcpiGetFirmwareTable to obtain any
8853 ACPI table via the ACPI signature. The interface can be called at
8854 any time during kernel initialization, even before the kernel
8855 virtual memory manager is initialized and paging is enabled. This
8856 allows kernel subsystems to obtain ACPI tables very early, even
8857 before the ACPI CA subsystem is initialized.
8859 Fixed a problem where Fields defined with the AnyAcc attribute
8860 could be resolved to the incorrect address under the following
8861 conditions: 1) the field width is larger than 8 bits and 2) the
8862 parent operation region is not defined on a DWORD boundary.
8864 Fixed a problem where the interpreter is not being locked during
8865 namespace initialization (during execution of the _INI control
8866 methods), causing an error when an attempt is made to release it
8869 ACPI 2.0 support in the AML Interpreter has begun and will be
8870 ongoing throughout the rest of this year. In this label, The Mod
8871 operator is implemented.
8873 Added a new data type to contain full PCI addresses named
8874 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
8875 and Function values.
8879 Enhanced the Linux version of the source code to change most
8880 capitalized ACPI type names to lowercase. For example, all
8881 instances of ACPI_STATUS are changed to acpi_status. This will
8882 result in a large diff, but the change is strictly cosmetic and
8883 aligns the CA code closer to the Linux coding standard.
8887 The interfaces to the PCI configuration space have been changed to
8888 add the PCI Segment number and to split the single 32-bit combined
8889 DeviceFunction field into two 16-bit fields. This was
8890 accomplished by moving the four values that define an address in
8891 PCI configuration space (segment, bus, device, and function) to
8892 the new ACPI_PCI_ID structure.
8894 The changes to the PCI configuration space interfaces led to a
8895 reexamination of the complete set of address space access
8896 interfaces for PCI, I/O, and Memory. The previously existing 18
8897 interfaces have proven difficult to maintain (any small change
8898 must be propagated across at least 6 interfaces) and do not easily
8899 allow for future expansion to 64 bits if necessary. Also, on some
8900 systems, it would not be appropriate to demultiplex the access
8901 width (8, 16, 32,or 64) before calling the OSL if the
8902 corresponding native OS interfaces contain a similar access width
8903 parameter. For these reasons, the 18 address space interfaces
8904 have been replaced by these 6 new ones:
8906 AcpiOsReadPciConfiguration
8907 AcpiOsWritePciConfiguration
8913 Added a new interface named AcpiOsGetRootPointer to allow the OSL
8914 to perform the platform and/or OS-specific actions necessary to
8915 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
8916 interface will simply call down to the CA core to perform the low-
8917 memory search for the table. On IA-64, the RSDP is obtained from
8918 EFI. Migrating this interface to the OSL allows the CA core to
8920 remain OS and platform independent.
8922 Added a new interface named AcpiOsSignal to provide a generic
8923 "function code and pointer" interface for various miscellaneous
8924 signals and notifications that must be made to the host OS. The
8925 first such signals are intended to support the ASL Fatal and
8926 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
8927 interface has been obsoleted.
8929 The definition of the AcpiFormatException interface has been
8930 changed to simplify its use. The caller no longer must supply a
8931 buffer to the call; A pointer to a const string is now returned
8932 directly. This allows the call to be easily used in printf
8933 statements, etc. since the caller does not have to manage a local
8937 ASL Compiler, Version X2025:
8939 The ACPI 2.0 Switch/Case/Default operators have been implemented
8940 and are fully functional. They will work with all ACPI 1.0
8941 interpreters, since the operators are simply translated to If/Else
8944 The ACPI 2.0 ElseIf operator is implemented and will also work
8945 with 1.0 interpreters, for the same reason.
8947 Implemented support for ACPI 2.0 variable-length packages. These
8948 packages have a separate opcode, and their size is determined by
8949 the interpreter at run-time.
8951 Documentation The ACPI CA Programmer Reference has been updated to
8952 reflect the new interfaces and changes to existing interfaces.
8954 ------------------------------------------
8955 Summary of changes for this label: 06_15_01
8957 ACPI CA Core Subsystem:
8959 Fixed a problem where a DWORD-accessed field within a Buffer
8960 object would get its byte address inadvertently rounded down to
8961 the nearest DWORD. Buffers are always Byte-accessible.
8963 ASL Compiler, version X2024:
8965 Fixed a problem where the Switch() operator would either fault or
8966 hang the compiler. Note however, that the AML code for this ACPI
8967 2.0 operator is not yet implemented.
8969 Compiler uses the new AcpiOsGetTimer interface to obtain compile
8972 Implementation of the CreateField operator automatically converts
8973 a reference to a named field within a resource descriptor from a
8974 byte offset to a bit offset if required.
8976 Added some missing named fields from the resource descriptor
8977 support. These are the names that are automatically created by the
8978 compiler to reference fields within a descriptor. They are only
8979 valid at compile time and are not passed through to the AML
8982 Resource descriptor named fields are now typed as Integers and
8983 subject to compile-time typechecking when used in expressions.
8985 ------------------------------------------
8986 Summary of changes for this label: 05_18_01
8988 ACPI CA Core Subsystem:
8990 Fixed a couple of problems in the Field support code where bits
8991 from adjacent fields could be returned along with the proper field
8992 bits. Restructured the field support code to improve performance,
8993 readability and maintainability.
8995 New DEBUG_PRINTP macro automatically inserts the procedure name
8996 into the output, saving hundreds of copies of procedure name
8997 strings within the source, shrinking the memory footprint of the
8998 debug version of the core subsystem.
9000 Source Code Structure:
9002 The source code directory tree was restructured to reflect the
9003 current organization of the component architecture. Some files
9004 and directories have been moved and/or renamed.
9008 Fixed leaking kacpidpc processes.
9010 Fixed queueing event data even when /proc/acpi/event is not
9013 ASL Compiler, version X2020:
9015 Memory allocation performance enhancement - over 24X compile time
9016 improvement on large ASL files. Parse nodes and namestring
9017 buffers are now allocated from a large internal compiler buffer.
9019 The temporary .SRC file is deleted unless the "-s" option is
9022 The "-d" debug output option now sends all output to the .DBG file
9023 instead of the console.
9025 "External" second parameter is now optional
9027 "ElseIf" syntax now properly allows the predicate
9029 Last operand to "Load" now recognized as a Target operand
9031 Debug object can now be used anywhere as a normal object.
9033 ResourceTemplate now returns an object of type BUFFER
9035 EISAID now returns an object of type INTEGER
9037 "Index" now works with a STRING operand
9039 "LoadTable" now accepts optional parameters
9041 "ToString" length parameter is now optional
9043 "Interrupt (ResourceType," parse error fixed.
9045 "Register" with a user-defined region space parse error fixed
9047 Escaped backslash at the end of a string ("\\") scan/parse error
9050 "Revision" is now an object of type INTEGER.
9054 ------------------------------------------
9055 Summary of changes for this label: 05_02_01
9059 /proc/acpi/event now blocks properly.
9061 Removed /proc/sys/acpi. You can still dump your DSDT from
9064 ACPI CA Core Subsystem:
9066 Fixed a problem introduced in the previous label where some of the
9067 "small" resource descriptor types were not recognized.
9069 Improved error messages for the case where an ASL Field is outside
9070 the range of the parent operation region.
9072 ASL Compiler, version X2018:
9075 Added error detection for ASL Fields that extend beyond the length
9076 of the parent operation region (only if the length of the region
9077 is known at compile time.) This includes fields that have a
9078 minimum access width that is smaller than the parent region, and
9079 individual field units that are partially or entirely beyond the
9080 extent of the parent.
9084 ------------------------------------------
9085 Summary of changes for this label: 04_27_01
9087 ACPI CA Core Subsystem:
9089 Fixed a problem where the namespace mutex could be released at the
9090 wrong time during execution of AcpiRemoveAddressSpaceHandler.
9092 Added optional thread ID output for debug traces, to simplify
9093 debugging of multiple threads. Added context switch notification
9094 when the debug code realizes that a different thread is now
9095 executing ACPI code.
9097 Some additional external data types have been prefixed with the
9098 string "ACPI_" for consistency. This may effect existing code.
9099 The data types affected are the external callback typedefs - e.g.,
9101 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
9105 Fixed an issue with the OSL semaphore implementation where a
9106 thread was waking up with an error from receiving a SIGCHLD
9109 Linux version of ACPI CA now uses the system C library for string
9110 manipulation routines instead of a local implementation.
9112 Cleaned up comments and removed TBDs.
9114 ASL Compiler, version X2017:
9116 Enhanced error detection and reporting for all file I/O
9121 Programmer Reference updated to version 1.06.
9125 ------------------------------------------
9126 Summary of changes for this label: 04_13_01
9128 ACPI CA Core Subsystem:
9130 Restructured support for BufferFields and RegionFields.
9131 BankFields support is now fully operational. All known 32-bit
9132 limitations on field sizes have been removed. Both BufferFields
9133 and (Operation) RegionFields are now supported by the same field
9136 Resource support now supports QWORD address and IO resources. The
9137 16/32/64 bit address structures and the Extended IRQ structure
9138 have been changed to properly handle Source Resource strings.
9140 A ThreadId of -1 is now used to indicate a "mutex not acquired"
9141 condition internally and must never be returned by AcpiOsThreadId.
9142 This reserved value was changed from 0 since Unix systems allow a
9147 Driver code reorganized to enhance portability
9149 Added a kernel configuration option to control ACPI_DEBUG
9151 Fixed the EC driver to honor _GLK.
9153 ASL Compiler, version X2016:
9155 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
9156 address space was set to 0, not 0x7f as it should be.
9158 ------------------------------------------
9159 Summary of changes for this label: 03_13_01
9161 ACPI CA Core Subsystem:
9163 During ACPI initialization, the _SB_._INI method is now run if
9166 Notify handler fix - notifies are deferred until the parent method
9167 completes execution. This fixes the "mutex already acquired"
9168 issue seen occasionally.
9170 Part of the "implicit conversion" rules in ACPI 2.0 have been
9171 found to cause compatibility problems with existing ASL/AML. The
9172 convert "result-to-target-type" implementation has been removed
9173 for stores to method Args and Locals. Source operand conversion
9174 is still fully implemented. Possible changes to ACPI 2.0
9175 specification pending.
9177 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
9180 Fix for compiler warnings for 64-bit compiles.
9184 /proc output aligned for easier parsing.
9186 Release-version compile problem fixed.
9188 New kernel configuration options documented in Configure.help.
9190 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
9195 Power resource driver integrated with bus manager.
9197 Fixed kernel fault during active cooling for thermal zones.
9201 The source code tree has been restructured.
9205 ------------------------------------------
9206 Summary of changes for this label: 03_02_01
9208 Linux OS Services Layer (OSL):
9210 Major revision of all Linux-specific code.
9212 Modularized all ACPI-specific drivers.
9214 Added new thermal zone and power resource drivers.
9216 Revamped /proc interface (new functionality is under /proc/acpi).
9218 New kernel configuration options.
9222 New kernel configuration options not documented in Configure.help
9226 Module dependencies not currently implemented. If used, they
9227 should be loaded in this order: busmgr, power, ec, system,
9228 processor, battery, ac_adapter, button, thermal.
9230 Modules will not load if CONFIG_MODVERSION is set.
9232 IBM 600E - entering S5 may reboot instead of shutting down.
9234 IBM 600E - Sleep button may generate "Invalid <NULL> context"
9237 Some systems may fail with "execution mutex already acquired"
9240 ACPI CA Core Subsystem:
9242 Added a new OSL Interface, AcpiOsGetThreadId. This was required
9243 for the deadlock detection code. Defined to return a non-zero, 32-
9244 bit thread ID for the currently executing thread. May be a non-
9245 zero constant integer on single-thread systems.
9247 Implemented deadlock detection for internal subsystem mutexes. We
9248 may add conditional compilation for this code (debug only) later.
9250 ASL/AML Mutex object semantics are now fully supported. This
9251 includes multiple acquires/releases by owner and support for the
9253 Mutex SyncLevel parameter.
9255 A new "Force Release" mechanism automatically frees all ASL
9256 Mutexes that have been acquired but not released when a thread
9257 exits the interpreter. This forces conformance to the ACPI spec
9258 ("All mutexes must be released when an invocation exits") and
9259 prevents deadlocked ASL threads. This mechanism can be expanded
9260 (later) to monitor other resource acquisitions if OEM ASL code
9261 continues to misbehave (which it will).
9263 Several new ACPI exception codes have been added for the Mutex
9266 Recursive method calls are now allowed and supported (the ACPI
9267 spec does in fact allow recursive method calls.) The number of
9268 recursive calls is subject to the restrictions imposed by the
9269 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
9272 Implemented support for the SyncLevel parameter for control
9273 methods (ACPI 2.0 feature)
9275 Fixed a deadlock problem when multiple threads attempted to use
9278 Fixed a problem where the string length of a String package
9279 element was not always set in a package returned from
9282 Fixed a problem where the length of a String package element was
9283 not always included in the length of the overall package returned
9284 from AcpiEvaluateObject.
9286 Added external interfaces (Acpi*) to the ACPI debug memory
9287 manager. This manager keeps a list of all outstanding
9288 allocations, and can therefore detect memory leaks and attempts to
9289 free memory blocks more than once. Useful for code such as the
9290 power manager, etc. May not be appropriate for device drivers.
9291 Performance with the debug code enabled is slow.
9293 The ACPI Global Lock is now an optional hardware element.
9295 ASL Compiler Version X2015:
9297 Integrated changes to allow the compiler to be generated on
9300 Linux makefile added to generate the compiler on Linux
9304 All platform-specific headers have been moved to their own
9305 subdirectory, Include/Platform.
9307 New source file added, Interpreter/ammutex.c
9309 New header file, Include/acstruct.h
9313 The programmer reference has been updated for the following new
9314 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
9316 ------------------------------------------
9317 Summary of changes for this label: 02_08_01
9319 Core ACPI CA Subsystem: Fixed a problem where an error was
9320 incorrectly returned if the return resource buffer was larger than
9321 the actual data (in the resource interfaces).
9323 References to named objects within packages are resolved to the
9325 full pathname string before packages are returned directly (via
9326 the AcpiEvaluateObject interface) or indirectly via the resource
9329 Linux OS Services Layer (OSL):
9331 Improved /proc battery interface.
9334 Added C-state debugging output and other miscellaneous fixes.
9336 ASL Compiler Version X2014:
9338 All defined method arguments can now be used as local variables,
9339 including the ones that are not actually passed in as parameters.
9340 The compiler tracks initialization of the arguments and issues an
9341 exception if they are used without prior assignment (just like
9344 The -o option now specifies a filename prefix that is used for all
9345 output files, including the AML output file. Otherwise, the
9346 default behavior is as follows: 1) the AML goes to the file
9347 specified in the DSDT. 2) all other output files use the input
9348 source filename as the base.
9350 ------------------------------------------
9351 Summary of changes for this label: 01_25_01
9353 Core ACPI CA Subsystem: Restructured the implementation of object
9354 store support within the interpreter. This includes support for
9355 the Store operator as well as any ASL operators that include a
9358 Partially implemented support for Implicit Result-to-Target
9359 conversion. This is when a result object is converted on the fly
9360 to the type of an existing target object. Completion of this
9361 support is pending further analysis of the ACPI specification
9362 concerning this matter.
9364 CPU-specific code has been removed from the subsystem (hardware
9367 New Power Management Timer functions added
9369 Linux OS Services Layer (OSL): Moved system state transition code
9370 to the core, fixed it, and modified Linux OSL accordingly.
9372 Fixed C2 and C3 latency calculations.
9375 We no longer use the compilation date for the version message on
9376 initialization, but retrieve the version from AcpiGetSystemInfo().
9378 Incorporated for fix Sony VAIO machines.
9380 Documentation: The Programmer Reference has been updated and
9384 ASL Compiler: Version X2013: Fixed a problem where the line
9385 numbering and error reporting could get out of sync in the
9386 presence of multiple include files.
9388 ------------------------------------------
9389 Summary of changes for this label: 01_15_01
9391 Core ACPI CA Subsystem:
9393 Implemented support for type conversions in the execution of the
9394 ASL Concatenate operator (The second operand is converted to
9395 match the type of the first operand before concatenation.)
9397 Support for implicit source operand conversion is partially
9398 implemented. The ASL source operand types Integer, Buffer, and
9399 String are freely interchangeable for most ASL operators and are
9400 converted by the interpreter on the fly as required. Implicit
9401 Target operand conversion (where the result is converted to the
9402 target type before storing) is not yet implemented.
9404 Support for 32-bit and 64-bit BCD integers is implemented.
9406 Problem fixed where a field read on an aligned field could cause a
9407 read past the end of the field.
9409 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
9410 does not return a value, but the caller expects one. (The ASL
9411 compiler flags this as a warning.)
9416 1. Static typechecking of all operands is implemented. This
9417 prevents the use of invalid objects (such as using a Package where
9418 an Integer is required) at compile time instead of at interpreter
9420 2. The ASL source line is printed with ALL errors and warnings.
9421 3. Bug fix for source EOF without final linefeed.
9422 4. Debug option is split into a parse trace and a namespace trace.
9423 5. Namespace output option (-n) includes initial values for
9424 integers and strings.
9425 6. Parse-only option added for quick syntax checking.
9426 7. Compiler checks for duplicate ACPI name declarations
9429 1. Relaxed typechecking to allow interchangeability between
9430 strings, integers, and buffers. These types are now converted by
9431 the interpreter at runtime.
9432 2. Compiler reports time taken by each internal subsystem in the
9436 ------------------------------------------
9437 Summary of changes for this label: 12_14_00
9441 This is the first official release of the compiler. Since the
9442 compiler requires elements of the Core Subsystem, this label
9443 synchronizes everything.
9445 ------------------------------------------
9446 Summary of changes for this label: 12_08_00
9449 Fixed a problem where named references within the ASL definition
9450 of both OperationRegions and CreateXXXFields did not work
9451 properly. The symptom was an AE_AML_OPERAND_TYPE during
9452 initialization of the region/field. This is similar (but not
9453 related internally) to the problem that was fixed in the last
9456 Implemented both 32-bit and 64-bit support for the BCD ASL
9457 functions ToBCD and FromBCD.
9459 Updated all legal headers to include "2000" in the copyright
9462 ------------------------------------------
9463 Summary of changes for this label: 12_01_00
9465 Fixed a problem where method invocations within the ASL definition
9466 of both OperationRegions and CreateXXXFields did not work
9467 properly. The symptom was an AE_AML_OPERAND_TYPE during
9468 initialization of the region/field:
9470 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
9471 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
9474 Fixed a problem where operators with more than one nested
9475 subexpression would fail. The symptoms were varied, by mostly
9476 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
9477 problem that has gone unnoticed until now.
9479 Subtract (Add (1,2), Multiply (3,4))
9481 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
9482 previous build (The prefix part of a relative path was handled
9485 Fixed a problem where Operation Region initialization failed if
9486 the operation region name was a "namepath" instead of a simple
9487 "nameseg". Symptom was an AE_NO_OPERAND error.
9489 Fixed a problem where an assignment to a local variable via the
9490 indirect RefOf mechanism only worked for the first such
9491 assignment. Subsequent assignments were ignored.
9493 ------------------------------------------
9494 Summary of changes for this label: 11_15_00
9496 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
9497 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
9498 the AML interpreter does NOT have support for the new 2.0 ASL
9499 grammar terms at this time.
9501 All ACPI hardware access is via the GAS structures in the ACPI 2.0
9504 All physical memory addresses across all platforms are now 64 bits
9505 wide. Logical address width remains dependent on the platform
9508 AcpiOsMapMemory interface changed to a 64-bit physical address.
9510 The AML interpreter integer size is now 64 bits, as per the ACPI
9513 For backwards compatibility with ACPI 1.0, ACPI tables with a
9514 revision number less than 2 use 32-bit integers only.
9516 Fixed a problem where the evaluation of OpRegion operands did not
9517 always resolve them to numbers properly.
9519 ------------------------------------------
9520 Summary of changes for this label: 10_20_00
9522 Fix for CBN_._STA issue. This fix will allow correct access to
9523 CBN_ OpRegions when the _STA returns 0x8.
9525 Support to convert ACPI constants (Ones, Zeros, One) to actual
9526 values before a package object is returned
9528 Fix for method call as predicate to if/while construct causing
9529 incorrect if/while behavior
9531 Fix for Else block package lengths sometimes calculated wrong (if
9534 Fix for Processor object length field, was always zero
9536 Table load abort if FACP sanity check fails
9538 Fix for problem with Scope(name) if name already exists
9540 Warning emitted if a named object referenced cannot be found
9541 (resolved) during method execution.
9547 ------------------------------------------
9548 Summary of changes for this label: 9_29_00
9550 New table initialization interfaces: AcpiInitializeSubsystem no
9551 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
9552 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
9553 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
9556 Note: These interface changes require changes to all existing OSDs
9558 The PCI_Config default address space handler is always installed
9559 at the root namespace object.
9561 -------------------------------------------
9562 Summary of changes for this label: 09_15_00
9564 The new initialization architecture is implemented. New
9565 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
9566 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
9568 (Namespace is automatically loaded when a table is loaded)
9570 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
9571 52 bytes to 32 bytes. There is usually one of these for every
9572 namespace object, so the memory savings is significant.
9574 Implemented just-in-time evaluation of the CreateField operators.
9576 Bug fixes for IA-64 support have been integrated.
9578 Additional code review comments have been implemented
9580 The so-called "third pass parse" has been replaced by a final walk
9581 through the namespace to initialize all operation regions (address
9582 spaces) and fields that have not yet been initialized during the
9583 execution of the various _INI and REG methods.
9585 New file - namespace/nsinit.c
9587 -------------------------------------------
9588 Summary of changes for this label: 09_01_00
9590 Namespace manager data structures have been reworked to change the
9591 primary object from a table to a single object. This has
9592 resulted in dynamic memory savings of 3X within the namespace and
9593 2X overall in the ACPI CA subsystem.
9595 Fixed problem where the call to AcpiEvFindPciRootBuses was
9596 inadvertently left commented out.
9598 Reduced the warning count when generating the source with the GCC
9601 Revision numbers added to each module header showing the
9602 SourceSafe version of the file. Please refer to this version
9603 number when giving us feedback or comments on individual modules.
9605 The main object types within the subsystem have been renamed to
9606 clarify their purpose:
9608 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
9609 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
9610 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
9612 NOTE: no changes to the initialization sequence are included in
9615 -------------------------------------------
9616 Summary of changes for this label: 08_23_00
9618 Fixed problem where TerminateControlMethod was being called
9619 multiple times per method
9621 Fixed debugger problem where single stepping caused a semaphore to
9624 Improved performance through additional parse object caching -
9625 added ACPI_EXTENDED_OP type
9627 -------------------------------------------
9628 Summary of changes for this label: 08_10_00
9630 Parser/Interpreter integration: Eliminated the creation of
9631 complete parse trees for ACPI tables and control methods.
9632 Instead, parse subtrees are created and then deleted as soon as
9633 they are processed (Either entered into the namespace or executed
9634 by the interpreter). This reduces the use of dynamic kernel
9635 memory significantly. (about 10X)
9637 Exception codes broken into classes and renumbered. Be sure to
9638 recompile all code that includes acexcep.h. Hopefully we won't
9639 have to renumber the codes again now that they are split into
9640 classes (environment, programmer, AML code, ACPI table, and
9643 Fixed some additional alignment issues in the Resource Manager
9646 Implemented semaphore tracking in the AcpiExec utility, and fixed
9647 several places where mutexes/semaphores were being unlocked
9648 without a corresponding lock operation. There are no known
9649 semaphore or mutex "leaks" at this time.
9651 Fixed the case where an ASL Return operator is used to return an
9654 -------------------------------------------
9655 Summary of changes for this label: 07_28_00
9657 Fixed a problem with the way addresses were calculated in
9658 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
9659 manifested itself when a Field was created with WordAccess or
9660 DwordAccess, but the field unit defined within the Field was less
9662 than a Word or Dword.
9664 Fixed a problem in AmlDumpOperands() module's loop to pull
9665 operands off of the operand stack to display information. The
9666 problem manifested itself as a TLB error on 64-bit systems when
9667 accessing an operand stack with two or more operands.
9669 Fixed a problem with the PCI configuration space handlers where
9670 context was getting confused between accesses. This required a
9671 change to the generic address space handler and address space
9672 setup definitions. Handlers now get both a global handler context
9673 (this is the one passed in by the user when executing
9674 AcpiInstallAddressSpaceHandler() and a specific region context
9675 that is unique to each region (For example, the _ADR, _SEG and
9676 _BBN values associated with a specific region). The generic
9677 function definitions have changed to the following:
9679 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
9680 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
9681 *HandlerContext, // This used to be void *Context void
9682 *RegionContext); // This is an additional parameter
9684 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
9685 RegionHandle, UINT32 Function, void *HandlerContext, void
9686 **RegionContext); // This used to be **ReturnContext
9688 -------------------------------------------
9689 Summary of changes for this label: 07_21_00
9691 Major file consolidation and rename. All files within the
9692 interpreter have been renamed as well as most header files. This
9693 was done to prevent collisions with existing files in the host
9694 OSs -- filenames such as "config.h" and "global.h" seem to be
9695 quite common. The VC project files have been updated. All
9696 makefiles will require modification.
9698 The parser/interpreter integration continues in Phase 5 with the
9699 implementation of a complete 2-pass parse (the AML is parsed
9700 twice) for each table; This avoids the construction of a huge
9701 parse tree and therefore reduces the amount of dynamic memory
9702 required by the subsystem. Greater use of the parse object cache
9703 means that performance is unaffected.
9705 Many comments from the two code reviews have been rolled in.
9707 The 64-bit alignment support is complete.
9709 -------------------------------------------
9710 Summary of changes for this label: 06_30_00
9712 With a nod and a tip of the hat to the technology of yesteryear,
9713 we've added support in the source code for 80 column output
9714 devices. The code is now mostly constrained to 80 columns or
9715 less to support environments and editors that 1) cannot display
9716 or print more than 80 characters on a single line, and 2) cannot
9717 disable line wrapping.
9719 A major restructuring of the namespace data structure has been
9720 completed. The result is 1) cleaner and more
9721 understandable/maintainable code, and 2) a significant reduction
9722 in the dynamic memory requirement for each named ACPI object
9725 -------------------------------------------
9726 Summary of changes for this label: 06_23_00
9728 Linux support has been added. In order to obtain approval to get
9729 the ACPI CA subsystem into the Linux kernel, we've had to make
9730 quite a few changes to the base subsystem that will affect all
9731 users (all the changes are generic and OS- independent). The
9732 effects of these global changes have been somewhat far reaching.
9733 Files have been merged and/or renamed and interfaces have been
9734 renamed. The major changes are described below.
9736 Osd* interfaces renamed to AcpiOs* to eliminate namespace
9737 pollution/confusion within our target kernels. All OSD
9738 interfaces must be modified to match the new naming convention.
9740 Files merged across the subsystem. A number of the smaller source
9741 and header files have been merged to reduce the file count and
9742 increase the density of the existing files. There are too many
9743 to list here. In general, makefiles that call out individual
9744 files will require rebuilding.
9746 Interpreter files renamed. All interpreter files now have the
9747 prefix am* instead of ie* and is*.
9749 Header files renamed: The acapi.h file is now acpixf.h. The
9750 acpiosd.h file is now acpiosxf.h. We are removing references to
9751 the acronym "API" since it is somewhat windowsy. The new name is
9752 "external interface" or xface or xf in the filenames.j
9755 All manifest constants have been forced to upper case (some were
9756 mixed case.) Also, the string "ACPI_" has been prepended to many
9757 (not all) of the constants, typedefs, and structs.
9759 The globals "DebugLevel" and "DebugLayer" have been renamed
9760 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
9762 All other globals within the subsystem are now prefixed with
9763 "AcpiGbl_" Internal procedures within the subsystem are now
9764 prefixed with "Acpi" (with only a few exceptions). The original
9765 two-letter abbreviation for the subcomponent remains after "Acpi"
9766 - for example, CmCallocate became AcpiCmCallocate.
9768 Added a source code translation/conversion utility. Used to
9769 generate the Linux source code, it can be modified to generate
9770 other types of source as well. Can also be used to cleanup
9771 existing source by removing extraneous spaces and blank lines.
9772 Found in tools/acpisrc/*
9774 OsdUnMapMemory was renamed to OsdUnmapMemory and then
9775 AcpiOsUnmapMemory. (UnMap became Unmap).
9777 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
9778 When set to one, this indicates that the caller wants to use the
9780 semaphore as a mutex, not a counting semaphore. ACPI CA uses
9781 both types. However, implementers of this call may want to use
9782 different OS primitives depending on the type of semaphore
9783 requested. For example, some operating systems provide separate
9785 "mutex" and "semaphore" interfaces - where the mutex interface is
9786 much faster because it doesn't have all the overhead of a full
9787 semaphore implementation.
9789 Fixed a deadlock problem where a method that accesses the PCI
9790 address space can block forever if it is the first access to the
9793 -------------------------------------------
9794 Summary of changes for this label: 06_02_00
9796 Support for environments that cannot handle unaligned data
9797 accesses (e.g. firmware and OS environments devoid of alignment
9798 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
9799 been added (via configurable macros) in these three areas: -
9800 Transfer of data from the raw AML byte stream is done via byte
9801 moves instead of word/dword/qword moves. - External objects are
9802 aligned within the user buffer, including package elements (sub-
9803 objects). - Conversion of name strings to UINT32 Acpi Names is now
9806 The Store operator was modified to mimic Microsoft's
9807 implementation when storing to a Buffer Field.
9809 Added a check of the BM_STS bit before entering C3.
9811 The methods subdirectory has been obsoleted and removed. A new
9812 file, cmeval.c subsumes the functionality.
9814 A 16-bit (DOS) version of AcpiExec has been developed. The
9815 makefile is under the acpiexec directory.