1 ----------------------------------------
2 27 June 2014. Summary of changes for version 20140627:
4 1) ACPICA kernel-resident subsystem:
6 Formatted Output: Implemented local versions of standard formatted output
7 utilities such as printf, etc. Over time, it has been discovered that
8 there are in fact many portability issues with printf, and the addition
9 of this feature will fix/prevent these issues once and for all. Some
10 known issues are summarized below:
12 1) Output of 64-bit values is not portable. For example, UINT64 is %ull
13 for the Linux kernel and is %uI64 for some MSVC versions.
14 2) Invoking printf consistently in a manner that is portable across both
15 32-bit and 64-bit platforms is difficult at best in many situations.
16 3) The output format for pointers varies from system to system (leading
17 zeros especially), and leads to inconsistent output from ACPICA across
19 4) Certain platform-specific printf formats may conflict with ACPICA use.
20 5) If there is no local C library available, ACPICA now has local support
23 -- To address these printf issues in a complete manner, ACPICA now
24 directly implements a small subset of printf format specifiers, only
25 those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
27 Implemented support for ACPICA generation within the EFI environment.
28 Initially, the AcpiDump utility is supported in the UEFI shell
29 environment. Lv Zheng.
31 Added a new external interface, AcpiLogError, to improve ACPICA
32 portability. This allows the host to redirect error messages from the
33 ACPICA utilities. Lv Zheng.
35 Added and deployed new OSL file I/O interfaces to improve ACPICA
43 There are C library implementations of these functions in the new file
44 service_layers/oslibcfs.c -- however, the functions can be implemented by
45 the local host in any way necessary. Lv Zheng.
47 Implemented a mechanism to disable/enable ACPI table checksum validation
48 at runtime. This can be useful when loading tables very early during OS
49 initialization when it may not be possible to map the entire table in
50 order to compute the checksum. Lv Zheng.
52 Fixed a buffer allocation issue for the Generic Serial Bus support.
53 Originally, a fixed buffer length was used. This change allows for
54 variable-length buffers based upon the protocol indicated by the field
55 access attributes. Reported by Lan Tianyu. Lv Zheng.
57 Fixed a problem where an object detached from a namespace node was not
58 properly terminated/cleared and could cause a circular list problem if
59 reattached. ACPICA BZ 1063. David Box.
61 Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
63 Fixed a possible memory leak in an error return path within the function
64 AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
66 Example Code and Data Size: These are the sizes for the OS-independent
67 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
68 debug version of the code includes the debug output trace mechanism and
69 has a much larger code and data size.
72 Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
73 Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
75 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
76 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
79 2) iASL Compiler/Disassembler and Tools:
81 Disassembler: Add dump of ASCII equivalent text within a comment at the
82 end of each line of the output for the Buffer() ASL operator.
84 AcpiDump: Miscellaneous changes:
85 Fixed repetitive table dump in -n mode.
86 For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
87 the ACPI 2.0 GUID fails.
89 iASL: Fixed a problem where the compiler could fault if incorrectly given
90 an acpidump output file as input. ACPICA BZ 1088. David Box.
92 AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
93 they are invoked without any arguments.
95 Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
98 Disassembler: Cleaned up a block of code that extracts a parent Op
99 object. Added a comment that explains that the parent is guaranteed to be
100 valid in this case. ACPICA BZ 1069.
102 ----------------------------------------
103 24 April 2014. Summary of changes for version 20140424:
105 1) ACPICA kernel-resident subsystem:
107 Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
108 Some of these tables are known to contain a trailing NULL entry. Lv
111 Removed an extraneous error message for the case where there are a large
112 number of system GPEs (> 124). This was the "32-bit FADT register is too
113 long to convert to GAS struct" message, which is irrelevant for GPEs
114 since the GPEx_BLK_LEN fields of the FADT are always used instead of the
115 (limited capacity) GAS bit length. Also, several changes to ensure proper
116 support for GPE numbers > 255, where some "GPE number" fields were 8-bits
119 Implemented and deployed additional configuration support for the public
120 ACPICA external interfaces. Entire classes of interfaces can now be
121 easily modified or configured out, replaced by stubbed inline functions
122 by default. Lv Zheng.
124 Moved all public ACPICA runtime configuration globals to the public
125 ACPICA external interface file for convenience. Also, removed some
126 obsolete/unused globals. See the file acpixf.h. Lv Zheng.
128 Documentation: Added a new section to the ACPICA reference describing the
129 maximum number of GPEs that can be supported by the FADT-defined GPEs in
130 block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
133 Example Code and Data Size: These are the sizes for the OS-independent
134 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
135 debug version of the code includes the debug output trace mechanism and
136 has a much larger code and data size.
139 Non-Debug Version: 96.8K Code, 27.2K Data, 124.0K Total
140 Debug Version: 189.5K Code, 79.7K Data, 269.2K Total
142 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
143 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
146 2) iASL Compiler/Disassembler and Tools:
148 iASL and disassembler: Add full support for the LPIT table (Low Power
149 Idle Table). Includes support in the disassembler, data table compiler,
150 and template generator.
153 1) Add option to force the use of the RSDT (over the XSDT).
154 2) Improve validation of the RSDP signature (use 8 chars instead of 4).
156 iASL: Add check for predefined packages that are too large. For
157 predefined names that contain subpackages, check if each subpackage is
158 too large. (Check for too small already exists.)
160 Debugger: Updated the GPE command (which simulates a GPE by executing the
161 GPE code paths in ACPICA). The GPE device is now optional, and defaults
162 to the GPE 0/1 FADT-defined blocks.
164 Unix application OSL: Update line-editing support. Add additional error
165 checking and take care not to reset terminal attributes on exit if they
166 were never set. This should help guarantee that the terminal is always
167 left in the previous state on program exit.
169 ----------------------------------------
170 25 March 2014. Summary of changes for version 20140325:
172 1) ACPICA kernel-resident subsystem:
174 Updated the auto-serialize feature for control methods. This feature
175 automatically serializes all methods that create named objects in order
176 to prevent runtime errors. The update adds support to ignore the
177 currently executing AML SyncLevel when invoking such a method, in order
178 to prevent disruption of any existing SyncLevel priorities that may exist
179 in the AML code. Although the use of SyncLevels is relatively rare, this
180 change fixes a regression where an AE_AML_MUTEX_ORDER exception can
181 appear on some machines starting with the 20140214 release.
183 Added a new external interface to allow the host to install ACPI tables
184 very early, before the namespace is even created. AcpiInstallTable gives
185 the host additional flexibility for ACPI table management. Tables can be
186 installed directly by the host as if they had originally appeared in the
187 XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
188 (anything except the DSDT and FACS). Adds a new file, tbdata.c, along
189 with additional internal restructuring and cleanup. See the ACPICA
190 Reference for interface details. Lv Zheng.
192 Added validation of the checksum for all incoming dynamically loaded
193 tables (via external interfaces or via AML Load/LoadTable operators). Lv
196 Updated the use of the AcpiOsWaitEventsComplete interface during Notify
197 and GPE handler removal. Restructured calls to eliminate possible race
198 conditions. Lv Zheng.
200 Added a warning for the use/execution of the ASL/AML Unload (table)
201 operator. This will help detect and identify machines that use this
202 operator if and when it is ever used. This operator has never been seen
203 in the field and the usage model and possible side-effects of the drastic
204 runtime action of a full table removal are unknown.
206 Reverted the use of #pragma push/pop which was introduced in the 20140214
207 release. It appears that push and pop are not implemented by enough
208 compilers to make the use of this feature feasible for ACPICA at this
209 time. However, these operators may be deployed in a future ACPICA
212 Added the missing EXPORT_SYMBOL macros for the install and remove SCI
215 Source code generation:
216 1) Disabled the use of the "strchr" macro for the gcc-specific
217 generation. For some versions of gcc, this macro can periodically expose
218 a compiler bug which in turn causes compile-time error(s).
219 2) Added support for PPC64 compilation. Colin Ian King.
221 Example Code and Data Size: These are the sizes for the OS-independent
222 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
223 debug version of the code includes the debug output trace mechanism and
224 has a much larger code and data size.
227 Non-Debug Version: 97.0K Code, 27.2K Data, 124.2K Total
228 Debug Version: 189.7K Code, 79.5K Data, 269.2K Total
230 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
231 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
234 2) iASL Compiler/Disassembler and Tools:
236 Disassembler: Added several new features to improve the readability of
237 the resulting ASL code. Extra information is emitted within comment
238 fields in the ASL code:
239 1) Known _HID/_CID values are decoded to descriptive text.
240 2) Standard values for the Notify() operator are decoded to descriptive
242 3) Target operands are expanded to full pathnames (in a comment) when
245 Disassembler: Miscellaneous updates for extern() handling:
246 1) Abort compiler if file specified by -fe option does not exist.
247 2) Silence unnecessary warnings about argument count mismatches.
248 3) Update warning messages concerning unresolved method externals.
249 4) Emit "UnknownObj" keyword for externals whose type cannot be
253 1) Added the -a option to display both the ASL syntax and the AML
254 encoding for an input ASL operator. This effectively displays all known
255 information about an ASL operator with one AcpiHelp invocation.
256 2) Added substring match support (similar to a wildcard) for the -i
257 (_HID/PNP IDs) option.
259 iASL/Disassembler: Since this tool does not yet support execution on big-
260 endian machines, added detection of endianness and an error message if
261 execution is attempted on big-endian. Support for big-endian within iASL
262 is a feature that is on the ACPICA to-be-done list.
265 1) Remove option to extract binary files from an acpidump; this function
266 is made obsolete by the AcpiXtract utility.
267 2) General cleanup of open files and allocated buffers.
269 ----------------------------------------
270 14 February 2014. Summary of changes for version 20140214:
272 1) ACPICA kernel-resident subsystem:
274 Implemented a new mechanism to proactively prevent problems with ill-
275 behaved reentrant control methods that create named ACPI objects. This
276 behavior is illegal as per the ACPI specification, but is nonetheless
277 frequently seen in the field. Previously, this could lead to an
278 AE_ALREADY_EXISTS exception if the method was actually entered by more
279 than one thread. This new mechanism detects such methods at table load
280 time and marks them "serialized" to prevent reentrancy. A new global
281 option, AcpiGbl_AutoSerializeMethods, has been added to disable this
282 feature if desired. This mechanism and global option obsoletes and
283 supersedes the previous AcpiGbl_SerializeAllMethods option.
285 Added the "Windows 2013" string to the _OSI support. ACPICA will now
286 respond TRUE to _OSI queries with this string. It is the stated policy of
287 ACPICA to add new strings to the _OSI support as soon as possible after
288 they are defined. See the full ACPICA _OSI policy which has been added to
289 the utilities/utosi.c file.
291 Hardened/updated the _PRT return value auto-repair code:
292 1) Do not abort the repair on a single subpackage failure, continue to
293 check all subpackages.
294 2) Add check for the minimum subpackage length (4).
295 3) Properly handle extraneous NULL package elements.
297 Added support to avoid the possibility of infinite loops when traversing
298 object linked lists. Never allow an infinite loop, even in the face of
299 corrupted object lists.
301 ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
302 pack(pop) directives to ensure that the ACPICA headers are independent of
303 compiler settings or other host headers.
305 Example Code and Data Size: These are the sizes for the OS-independent
306 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
307 debug version of the code includes the debug output trace mechanism and
308 has a much larger code and data size.
311 Non-Debug Version: 96.5K Code, 27.2K Data, 123.7K Total
312 Debug Version: 188.6K Code, 79.0K Data, 267.6K Total
314 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
315 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
318 2) iASL Compiler/Disassembler and Tools:
320 iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
321 first reserved field was incorrectly forced to have a value of zero. This
322 change correctly forces the field to have a value of one. ACPICA BZ 1081.
324 Debugger: Added missing support for the "Extra" and "Data" subobjects
325 when displaying object data.
327 Debugger: Added support to display entire object linked lists when
328 displaying object data.
330 iASL: Removed the obsolete -g option to obtain ACPI tables from the
331 Windows registry. This feature has been superseded by the acpidump
334 ----------------------------------------
335 14 January 2014. Summary of changes for version 20140114:
337 1) ACPICA kernel-resident subsystem:
339 Updated all ACPICA copyrights and signons to 2014. Added the 2014
340 copyright to all module headers and signons, including the standard Linux
341 header. This affects virtually every file in the ACPICA core subsystem,
342 iASL compiler, all ACPICA utilities, and the test suites.
344 Improved parameter validation for AcpiInstallGpeBlock. Added the
346 1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
347 2) There is not already a GPE block attached to the device.
348 Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
351 Correctly support "references" in the ACPI_OBJECT. This change fixes the
352 support to allow references (namespace nodes) to be passed as arguments
353 to control methods via the evaluate object interface. This is probably
354 most useful for testing purposes, however.
356 Improved support for 32/64 bit physical addresses in printf()-like
357 output. This change improves the support for physical addresses in printf
358 debug statements and other output on both 32-bit and 64-bit hosts. It
359 consistently outputs the appropriate number of bytes for each host. The
360 %p specifier is unsatisfactory since it does not emit uniform output on
361 all hosts/clib implementations (on some, leading zeros are not supported,
362 leading to difficult-to-read output).
364 Example Code and Data Size: These are the sizes for the OS-independent
365 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
366 debug version of the code includes the debug output trace mechanism and
367 has a much larger code and data size.
370 Non-Debug Version: 96.2K Code, 27.0K Data, 123.2K Total
371 Debug Version: 187.5K Code, 78.3K Data, 265.8K Total
373 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
374 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
377 2) iASL Compiler/Disassembler and Tools:
379 iASL: Fix a possible fault when using the Connection() operator. Fixes a
380 problem if the parent Field definition for the Connection operator refers
381 to an operation region that does not exist. ACPICA BZ 1064.
383 AcpiExec: Load of local test tables is now optional. The utility has the
384 capability to load some various tables to test features of ACPICA.
385 However, there are enough of them that the output of the utility became
386 confusing. With this change, only the required local tables are displayed
387 (RSDP, XSDT, etc.) along with the actual tables loaded via the command
388 line specification. This makes the default output simler and easier to
389 understand. The -el command line option restores the original behavior
390 for testing purposes.
392 AcpiExec: Added support for overlapping operation regions. This change
393 expands the simulation of operation regions by supporting regions that
394 overlap within the given address space. Supports SystemMemory and
395 SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
397 AcpiExec: Added region handler support for PCI_Config and EC spaces. This
398 allows AcpiExec to simulate these address spaces, similar to the current
399 support for SystemMemory and SystemIO.
401 Debugger: Added new command to read/write/compare all namespace objects.
402 The command "test objects" will exercise the entire namespace by writing
403 new values to each data object, and ensuring that the write was
404 successful. The original value is then restored and verified.
406 Debugger: Added the "test predefined" command. This change makes this
407 test public and puts it under the new "test" command. The test executes
408 each and every predefined name within the current namespace.
410 ----------------------------------------
411 18 December 2013. Summary of changes for version 20131218:
413 Global note: The ACPI 5.0A specification was released this month. There
414 are no changes needed for ACPICA since this release of ACPI is an
415 errata/clarification release. The specification is available at
419 1) ACPICA kernel-resident subsystem:
421 Added validation of the XSDT root table if it is present. Some older
422 platforms contain an XSDT that is ill-formed or otherwise invalid (such
423 as containing some or all entries that are NULL pointers). This change
424 adds a new function to validate the XSDT before actually using it. If the
425 XSDT is found to be invalid, ACPICA will now automatically fall back to
426 using the RSDT instead. Original implementation by Zhao Yakui. Ported to
427 ACPICA and enhanced by Lv Zheng and Bob Moore.
429 Added a runtime option to ignore the XSDT and force the use of the RSDT.
430 This change adds a runtime option that will force ACPICA to use the RSDT
431 instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
432 requires that an XSDT be used instead of the RSDT, the XSDT has been
433 found to be corrupt or ill-formed on some machines. Lv Zheng.
435 Added a runtime option to favor 32-bit FADT register addresses over the
436 64-bit addresses. This change adds an option to favor 32-bit FADT
437 addresses when there is a conflict between the 32-bit and 64-bit versions
438 of the same register. The default behavior is to use the 64-bit version
439 in accordance with the ACPI specification. This can now be overridden via
440 the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
442 During the change above, the internal "Convert FADT" and "Verify FADT"
443 functions have been merged to simplify the code, making it easier to
444 understand and maintain. ACPICA BZ 933.
446 Improve exception reporting and handling for GPE block installation.
447 Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
448 status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
450 Added helper macros to extract bus/segment numbers from the HEST table.
451 This change adds two macros to extract the encoded bus and segment
452 numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
453 Betty Dall <betty.dall@hp.com>
455 Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
456 by ACPICA. It is not a public macro, so it should have no effect on
457 existing OSV code. Lv Zheng.
459 Example Code and Data Size: These are the sizes for the OS-independent
460 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
461 debug version of the code includes the debug output trace mechanism and
462 has a much larger code and data size.
465 Non-Debug Version: 96.1K Code, 27.0K Data, 123.1K Total
466 Debug Version: 185.6K Code, 77.3K Data, 262.9K Total
468 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
469 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
472 2) iASL Compiler/Disassembler and Tools:
474 Disassembler: Improved pathname support for emitted External()
475 statements. This change adds full pathname support for external names
476 that have been resolved internally by the inclusion of additional ACPI
477 tables (via the iASL -e option). Without this change, the disassembler
478 can emit multiple externals for the same object, or it become confused
479 when the Scope() operator is used on an external object. Overall, greatly
480 improves the ability to actually recompile the emitted ASL code when
481 objects a referenced across multiple ACPI tables. Reported by Michael
482 Tsirkin (mst@redhat.com).
484 Tests/ASLTS: Updated functional control suite to execute with no errors.
485 David Box. Fixed several errors related to the testing of the interpreter
486 slack mode. Lv Zheng.
488 iASL: Added support to detect names that are declared within a control
489 method, but are unused (these are temporary names that are only valid
490 during the time the method is executing). A remark is issued for these
491 cases. ACPICA BZ 1022.
493 iASL: Added full support for the DBG2 table. Adds full disassembler,
494 table compiler, and template generator support for the DBG2 table (Debug
497 iASL: Added full support for the PCCT table, update the table definition.
498 Updates the PCCT table definition in the actbl3.h header and adds table
499 compiler and template generator support.
501 iASL: Added an option to emit only error messages (no warnings/remarks).
502 The -ve option will enable only error messages, warnings and remarks are
503 suppressed. This can simplify debugging when only the errors are
504 important, such as when an ACPI table is disassembled and there are many
505 warnings and remarks -- but only the actual errors are of real interest.
507 Example ACPICA code (source/tools/examples): Updated the example code so
508 that it builds to an actual working program, not just example code. Added
509 ACPI tables and execution of an example control method in the DSDT. Added
510 makefile support for Unix generation.
512 ----------------------------------------
513 15 November 2013. Summary of changes for version 20131115:
515 This release is available at https://acpica.org/downloads
518 1) ACPICA kernel-resident subsystem:
520 Resource Manager: Fixed loop termination for the "get AML length"
521 function. The loop previously had an error termination on a NULL resource
522 pointer, which can never happen since the loop simply increments a valid
523 resource pointer. This fix changes the loop to terminate with an error on
524 an invalid end-of-buffer condition. The problem can be seen as an
525 infinite loop by callers to AcpiSetCurrentResources with an invalid or
526 corrupted resource descriptor, or a resource descriptor that is missing
527 an END_TAG descriptor. Reported by Dan Carpenter
528 <dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
530 Table unload and ACPICA termination: Delete all attached data objects
531 during namespace node deletion. This fix updates namespace node deletion
532 to delete the entire list of attached objects (attached via
533 AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
534 1024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
536 ACPICA termination: Added support to delete all objects attached to the
537 root namespace node. This fix deletes any and all objects that have been
538 attached to the root node via AcpiAttachData. Previously, none of these
539 objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
541 Debug output: Do not emit the function nesting level for the in-kernel
542 build. The nesting level is really only useful during a single-thread
543 execution. Therefore, only enable this output for the AcpiExec utility.
544 Also, only emit the thread ID when executing under AcpiExec (Context
545 switches are still always detected and a message is emitted). ACPICA BZ
548 Example Code and Data Size: These are the sizes for the OS-independent
549 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
550 debug version of the code includes the debug output trace mechanism and
551 has a much larger code and data size.
554 Non-Debug Version: 95.9K Code, 27.0K Data, 122.9K Total
555 Debug Version: 185.1K Code, 77.2K Data, 262.3K Total
557 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
558 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
561 2) iASL Compiler/Disassembler and Tools:
563 AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
564 correct portable POSIX header for terminal control functions.
566 Disassembler: Fixed control method invocation issues related to the use
567 of the CondRefOf() operator. The problem is seen in the disassembly where
568 control method invocations may not be disassembled properly if the
569 control method name has been used previously as an argument to CondRefOf.
570 The solution is to not attempt to emit an external declaration for the
571 CondRefOf target (it is not necessary in the first place). This prevents
572 disassembler object type confusion. ACPICA BZ 988.
574 Unix Makefiles: Added an option to disable compiler optimizations and the
575 _FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
576 with optimizations (reportedly, gcc 4.4 for example). This change adds a
577 command line option for make (NOOPT) that disables all compiler
578 optimizations and the _FORTIFY_SOURCE compiler flag. The default
579 optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
580 1034. Lv Zheng, Bob Moore.
582 Tests/ASLTS: Added options to specify individual test cases and modes.
583 This allows testers running aslts.sh to optionally specify individual
584 test modes and test cases. Also added an option to disable the forced
585 generation of the ACPICA tools from source if desired. Lv Zheng.
587 ----------------------------------------
588 27 September 2013. Summary of changes for version 20130927:
590 This release is available at https://acpica.org/downloads
593 1) ACPICA kernel-resident subsystem:
595 Fixed a problem with store operations to reference objects. This change
596 fixes a problem where a Store operation to an ArgX object that contained
598 reference to a field object did not complete the automatic dereference
600 then write to the actual field object. Instead, the object type of the
601 field object was inadvertently changed to match the type of the source
602 operand. The new behavior will actually write to the field object (buffer
603 field or field unit), thus matching the correct ACPI-defined behavior.
605 Implemented support to allow the host to redefine individual OSL
606 prototypes. This change enables the host to redefine OSL prototypes found
607 in the acpiosxf.h file. This allows the host to implement OSL interfaces
608 with a macro or inlined function. Further, it allows the host to add any
609 additional required modifiers such as __iomem, __init, __exit, etc., as
610 necessary on a per-interface basis. Enables maximum flexibility for the
611 OSL interfaces. Lv Zheng.
613 Hardcoded the access width for the FADT-defined reset register. The ACPI
614 specification requires the reset register width to be 8 bits. ACPICA now
615 hardcodes the width to 8 and ignores the FADT width value. This provides
616 compatibility with other ACPI implementations that have allowed BIOS code
617 with bad register width values to go unnoticed. Matthew Garett, Bob
621 Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
623 in the OSL header (acpiosxf). The change modifies the position of this
624 macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
625 build issues if the OSL defines the implementation of the interface to be
626 an inline stub function. Lv Zheng.
628 Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
629 initialization interfaces. This change adds a new macro for the main init
630 and terminate external interfaces in order to support hosts that require
631 additional or different processing for these functions. Changed from
632 ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
635 Cleaned up the memory allocation macros for configurability. In the
637 case, the ACPI_ALLOCATE and related macros now resolve directly to their
638 respective AcpiOs* OSL interfaces. Two options:
639 1) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
640 default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
641 2) For AcpiExec (and for debugging), the macros can optionally be
643 to the local ACPICA interfaces that track each allocation (local tracking
644 is used to immediately detect memory leaks).
647 Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
648 to predefine this macro to either TRUE or FALSE during the system build.
650 Replaced __FUNCTION_ with __func__ in the gcc-specific header.
652 Example Code and Data Size: These are the sizes for the OS-independent
653 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
654 debug version of the code includes the debug output trace mechanism and
655 has a much larger code and data size.
658 Non-Debug Version: 95.8K Code, 27.0K Data, 122.8K Total
659 Debug Version: 185.2K Code, 77.2K Data, 262.4K Total
661 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
662 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
665 2) iASL Compiler/Disassembler and Tools:
667 iASL: Implemented wildcard support for the -e option. This simplifies use
668 when there are many SSDTs that must be included to resolve external
670 declarations. ACPICA BZ 1041. Example:
671 iasl -e ssdt*.dat -d dsdt.dat
673 AcpiExec: Add history/line-editing for Unix/Linux systems. This change
674 adds a portable module that implements full history and limited line
675 editing for Unix and Linux systems. It does not use readline() due to
676 portability issues. Instead it uses the POSIX termio interface to put the
677 terminal in raw input mode so that the various special keys can be
679 (such as up/down-arrow for history support and left/right-arrow for line
680 editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
682 AcpiXtract: Add support to handle (ignore) "empty" lines containing only
683 one or more spaces. This provides compatible with early or different
684 versions of the AcpiDump utility. ACPICA BZ 1044.
686 AcpiDump: Do not ignore tables that contain only an ACPI table header.
687 Apparently, some BIOSs create SSDTs that contain an ACPI table header but
688 no other data. This change adds support to dump these tables. Any tables
689 shorter than the length of an ACPI table header remain in error (an error
690 message is emitted). Reported by Yi Li.
692 Debugger: Echo actual command along with the "unknown command" message.
694 ----------------------------------------
695 23 August 2013. Summary of changes for version 20130823:
697 1) ACPICA kernel-resident subsystem:
699 Implemented support for host-installed System Control Interrupt (SCI)
700 handlers. Certain ACPI functionality requires the host to handle raw
701 SCIs. For example, the "SCI Doorbell" that is defined for memory power
702 state support requires the host device driver to handle SCIs to examine
703 if the doorbell has been activated. Multiple SCI handlers can be
704 installed to allow for future expansion. New external interfaces are
705 AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
706 details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
708 Operation region support: Never locally free the handler "context"
709 pointer. This change removes some dangerous code that attempts to free
710 the handler context pointer in some (rare) circumstances. The owner of
711 the handler owns this pointer and the ACPICA code should never touch it.
712 Although not seen to be an issue in any kernel, it did show up as a
713 problem (fault) under AcpiExec. Also, set the internal storage field for
714 the context pointer to zero when the region is deactivated, simply for
715 sanity. David Box. ACPICA BZ 1039.
717 AcpiRead: On error, do not modify the return value target location. If an
718 error happens in the middle of a split 32/32 64-bit I/O operation, do not
719 modify the target of the return value pointer. Makes the code consistent
720 with the rest of ACPICA. Bjorn Helgaas.
722 Example Code and Data Size: These are the sizes for the OS-independent
723 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
724 debug version of the code includes the debug output trace mechanism and
725 has a much larger code and data size.
728 Non-Debug Version: 96.7K Code, 27.1K Data, 123.9K Total
729 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
731 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
732 Debug Version: 185.4K Code, 77.1K Data, 262.5K Total
735 2) iASL Compiler/Disassembler and Tools:
737 AcpiDump: Implemented several new features and fixed some problems:
738 1) Added support to dump the RSDP, RSDT, and XSDT tables.
739 2) Added support for multiple table instances (SSDT, UEFI).
740 3) Added option to dump "customized" (overridden) tables (-c).
741 4) Fixed a problem where some table filenames were improperly
743 5) Improved some error messages, removed some unnecessary messages.
745 iASL: Implemented additional support for disassembly of ACPI tables that
746 contain invocations of external control methods. The -fe<file> option
747 allows the import of a file that specifies the external methods along
748 with the required number of arguments for each -- allowing for the
749 correct disassembly of the table. This is a workaround for a limitation
750 of AML code where the disassembler often cannot determine the number of
751 arguments required for an external control method and generates incorrect
752 ASL code. See the iASL reference for details. ACPICA BZ 1030.
754 Debugger: Implemented a new command (paths) that displays the full
755 pathnames (namepaths) and object types of all objects in the namespace.
756 This is an alternative to the namespace command.
758 Debugger: Implemented a new command (sci) that invokes the SCI dispatch
759 mechanism and any installed handlers.
761 iASL: Fixed a possible segfault for "too many parent prefixes" condition.
762 This can occur if there are too many parent prefixes in a namepath (for
763 example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
765 Application OSLs: Set the return value for the PCI read functions. These
766 functions simply return AE_OK, but should set the return value to zero
767 also. This change implements this. ACPICA BZ 1038.
769 Debugger: Prevent possible command line buffer overflow. Increase the
770 size of a couple of the debugger line buffers, and ensure that overflow
771 cannot happen. ACPICA BZ 1037.
773 iASL: Changed to abort immediately on serious errors during the parsing
774 phase. Due to the nature of ASL, there is no point in attempting to
775 compile these types of errors, and they typically end up causing a
776 cascade of hundreds of errors which obscure the original problem.
778 ----------------------------------------
779 25 July 2013. Summary of changes for version 20130725:
781 1) ACPICA kernel-resident subsystem:
783 Fixed a problem with the DerefOf operator where references to FieldUnits
784 and BufferFields incorrectly returned the parent object, not the actual
785 value of the object. After this change, a dereference of a FieldUnit
786 reference results in a read operation on the field to get the value, and
787 likewise, the appropriate BufferField value is extracted from the target
790 Fixed a problem where the _WAK method could cause a fault under these
791 circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
792 method returned no value. The problem is rarely seen because most kernels
793 run ACPICA in slack mode.
795 For the DerefOf operator, a fatal error now results if an attempt is made
796 to dereference a reference (created by the Index operator) to a NULL
797 package element. Provides compatibility with other ACPI implementations,
798 and this behavior will be added to a future version of the ACPI
801 The ACPI Power Management Timer (defined in the FADT) is now optional.
802 This provides compatibility with other ACPI implementations and will
803 appear in the next version of the ACPI specification. If there is no PM
804 Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
805 zero in the FADT indicates no PM timer.
807 Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
808 allows the host to globally enable/disable all vendor strings, all
809 feature strings, or both. Intended to be primarily used for debugging
810 purposes only. Lv Zheng.
812 Expose the collected _OSI data to the host via a global variable. This
813 data tracks the highest level vendor ID that has been invoked by the BIOS
814 so that the host (and potentially ACPICA itself) can change behaviors
815 based upon the age of the BIOS.
817 Example Code and Data Size: These are the sizes for the OS-independent
818 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
819 debug version of the code includes the debug output trace mechanism and
820 has a much larger code and data size.
823 Non-Debug Version: 96.2K Code, 27.1K Data, 123.3K Total
824 Debug Version: 184.4K Code, 76.8K Data, 261.2K Total
826 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
827 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
830 2) iASL Compiler/Disassembler and Tools:
832 iASL: Created the following enhancements for the -so option (create
834 1)Add offsets for the last nameseg in each namepath for every supported
836 2)Add support for Processor, Device, Thermal Zone, and Scope objects
837 3)Add the actual AML opcode for the parent object of every supported
839 4)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
841 Disassembler: Emit all unresolved external symbols in a single block.
842 These are external references to control methods that could not be
843 resolved, and thus, the disassembler had to make a guess at the number of
846 iASL: The argument to the -T option (create table template) is now
847 optional. If not specified, the default table is a DSDT, typically the
850 ----------------------------------------
851 26 June 2013. Summary of changes for version 20130626:
853 1) ACPICA kernel-resident subsystem:
855 Fixed an issue with runtime repair of the _CST object. Null or invalid
856 elements were not always removed properly. Lv Zheng.
858 Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
859 FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
860 the maximum number of GPEs is 1016. Use of multiple GPE block devices
861 makes the system-wide number of GPEs essentially unlimited.
863 Example Code and Data Size: These are the sizes for the OS-independent
864 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
865 debug version of the code includes the debug output trace mechanism and
866 has a much larger code and data size.
869 Non-Debug Version: 95.9K Code, 26.9K Data, 122.8K Total
870 Debug Version: 184.1K Code, 76.7K Data, 260.8K Total
872 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
873 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
876 2) iASL Compiler/Disassembler and Tools:
878 Portable AcpiDump: Implemented full support for the Linux and FreeBSD
879 hosts. Now supports Linux, FreeBSD, and Windows.
881 Disassembler: Added some missing types for the HEST and EINJ tables: "Set
882 Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
884 iASL/Preprocessor: Implemented full support for nested
885 #if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
887 Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
888 max. The original purpose of this constraint was to limit the amount of
889 debug output. However, the string function in question (UtPrintString) is
890 now used for the disassembler also, where 256 bytes is insufficient.
891 Reported by RehabMan@GitHub.
893 iASL/DataTables: Fixed some problems and issues with compilation of DMAR
894 tables. ACPICA BZ 999. Lv Zheng.
896 iASL: Fixed a couple of error exit issues that could result in a "Could
897 not delete <file>" message during ASL compilation.
899 AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
900 the actual signatures for these tables are "FACP" and "APIC",
903 AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
904 tables are allowed to have multiple instances.
906 ----------------------------------------
907 17 May 2013. Summary of changes for version 20130517:
909 1) ACPICA kernel-resident subsystem:
911 Fixed a regression introduced in version 20130328 for _INI methods. This
912 change fixes a problem introduced in 20130328 where _INI methods are no
913 longer executed properly because of a memory block that was not
914 initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
915 <tomasz.nowicki@linaro.org>.
917 Fixed a possible problem with the new extended sleep registers in the
919 5.0 FADT. Do not use these registers (even if populated) unless the HW-
920 reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
923 Implemented return value repair code for _CST predefined objects: Sort
925 list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
927 Implemented a debug-only option to disable loading of SSDTs from the
928 RSDT/XSDT during ACPICA initialization. This can be useful for debugging
929 ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
930 acglobal.h - ACPICA BZ 1005. Lv Zheng.
932 Fixed some issues in the ACPICA initialization and termination code:
933 Tomasz Nowicki <tomasz.nowicki@linaro.org>
934 1) Clear events initialized flag upon event component termination. ACPICA
936 2) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
937 3) Delete global lock pending lock during termination. ACPICA BZ 1012.
938 4) Clear debug buffer global on termination to prevent possible multiple
939 delete. ACPICA BZ 1010.
941 Standardized all switch() blocks across the entire source base. After
943 years, different formatting for switch() had crept in. This change makes
944 the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
946 Split some files to enhance ACPICA modularity and configurability:
947 1) Split buffer dump routines into utilities/utbuffer.c
948 2) Split internal error message routines into utilities/uterror.c
949 3) Split table print utilities into tables/tbprint.c
950 4) Split iASL command-line option processing into asloptions.c
952 Makefile enhancements:
953 1) Support for all new files above.
954 2) Abort make on errors from any subcomponent. Chao Guan.
955 3) Add build support for Apple Mac OS X. Liang Qi.
957 Example Code and Data Size: These are the sizes for the OS-independent
958 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
959 debug version of the code includes the debug output trace mechanism and
960 has a much larger code and data size.
963 Non-Debug Version: 96.0K Code, 27.0K Data, 123.0K Total
964 Debug Version: 184.1K Code, 76.8K Data, 260.9K Total
966 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
967 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
970 2) iASL Compiler/Disassembler and Tools:
972 New utility: Implemented an easily portable version of the acpidump
973 utility to extract ACPI tables from the system (or a file) in an ASCII
975 dump format. The top-level code implements the various command line
976 options, file I/O, and table dump routines. To port to a new host, only
977 three functions need to be implemented to get tables -- since this
978 functionality is OS-dependent. See the tools/acpidump/apmain.c module and
979 the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
980 1) The Windows version obtains the ACPI tables from the Registry.
981 2) The Linux version is under development.
982 3) Other hosts - If an OS-dependent module is submitted, it will be
983 distributed with ACPICA.
985 iASL: Fixed a regression for -D preprocessor option (define symbol). A
986 restructuring/change to the initialization sequence caused this option to
987 no longer work properly.
989 iASL: Implemented a mechanism to disable specific warnings and remarks.
990 Adds a new command line option, "-vw <messageid> as well as "#pragma
991 disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
993 iASL: Fix for too-strict package object validation. The package object
994 validation for return values from the predefined names is a bit too
995 strict, it does not allow names references within the package (which will
996 be resolved at runtime.) These types of references cannot be validated at
997 compile time. This change ignores named references within package objects
998 for names that return or define static packages.
1000 Debugger: Fixed the 80-character command line limitation for the History
1001 command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
1003 iASL: Added control method and package support for the -so option
1004 (generates AML offset table for BIOS support.)
1006 iASL: issue a remark if a non-serialized method creates named objects. If
1007 a thread blocks within the method for any reason, and another thread
1008 enters the method, the method will fail because an attempt will be made
1010 create the same (named) object twice. In this case, issue a remark that
1011 the method should be marked serialized. NOTE: may become a warning later.
1014 ----------------------------------------
1015 18 April 2013. Summary of changes for version 20130418:
1017 1) ACPICA kernel-resident subsystem:
1019 Fixed a possible buffer overrun during some rare but specific field unit
1020 read operations. This overrun can only happen if the DSDT version is 1 --
1021 meaning that all AML integers are 32 bits -- and the field length is
1022 between 33 and 55 bits long. During the read, an internal buffer object
1024 created for the field unit because the field is larger than an integer
1026 bits). However, in this case, the buffer will be incorrectly written
1027 beyond the end because the buffer length is less than the internal
1029 of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
1030 long, but a full 8 bytes will be written.
1032 Updated the Embedded Controller "orphan" _REG method support. This refers
1033 to _REG methods under the EC device that have no corresponding operation
1034 region. This is allowed by the ACPI specification. This update removes a
1035 dependency on the existence an ECDT table. It will execute an orphan _REG
1036 method as long as the operation region handler for the EC is installed at
1037 the EC device node and not the namespace root. Rui Zhang (original
1038 update), Bob Moore (update/integrate).
1040 Implemented run-time argument typechecking for all predefined ACPI names
1041 (_STA, _BIF, etc.) This change performs object typechecking on all
1042 incoming arguments for all predefined names executed via
1043 AcpiEvaluateObject. This ensures that ACPI-related device drivers are
1044 passing correct object types as well as the correct number of arguments
1045 (therefore identifying any issues immediately). Also, the ASL/namespace
1046 definition of the predefined name is checked against the ACPI
1047 specification for the proper argument count. Adds one new file,
1050 Changed an exception code for the ASL UnLoad() operator. Changed the
1051 exception code for the case where the input DdbHandle is invalid, from
1052 AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
1054 Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
1055 global makefile. The use of this flag causes compiler errors on earlier
1056 versions of GCC, so it has been removed for compatibility.
1058 Miscellaneous cleanup:
1059 1) Removed some unused/obsolete macros
1060 2) Fixed a possible memory leak in the _OSI support
1061 3) Removed an unused variable in the predefined name support
1062 4) Windows OSL: remove obsolete reference to a memory list field
1064 Example Code and Data Size: These are the sizes for the OS-independent
1065 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1066 debug version of the code includes the debug output trace mechanism and
1067 has a much larger code and data size.
1070 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
1071 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
1073 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
1074 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
1077 2) iASL Compiler/Disassembler and Tools:
1079 AcpiExec: Added installation of a handler for the SystemCMOS address
1080 space. This prevents control method abort if a method accesses this
1083 AcpiExec: Added support for multiple EC devices, and now install EC
1084 operation region handler(s) at the actual EC device instead of the
1085 namespace root. This reflects the typical behavior of host operating
1088 AcpiExec: Updated to ensure that all operation region handlers are
1089 installed before the _REG methods are executed. This prevents a _REG
1090 method from aborting if it accesses an address space has no handler.
1091 AcpiExec installs a handler for every possible address space.
1093 Debugger: Enhanced the "handlers" command to display non-root handlers.
1094 This change enhances the handlers command to display handlers associated
1095 with individual devices throughout the namespace, in addition to the
1096 currently supported display of handlers associated with the root
1100 ASL Test Suite: Several test suite errors have been identified and
1101 resolved, reducing the total error count during execution. Chao Guan.
1103 ----------------------------------------
1104 28 March 2013. Summary of changes for version 20130328:
1106 1) ACPICA kernel-resident subsystem:
1108 Fixed several possible race conditions with the internal object reference
1109 counting mechanism. Some of the external ACPICA interfaces update object
1110 reference counts without holding the interpreter or namespace lock. This
1111 change adds a spinlock to protect reference count updates on the internal
1112 ACPICA objects. Reported by and with assistance from Andriy Gapon
1115 FADT support: Removed an extraneous warning for very large GPE register
1116 sets. This change removes a size mismatch warning if the legacy length
1117 field for a GPE register set is larger than the 64-bit GAS structure can
1118 accommodate. GPE register sets can be larger than the 255-bit width
1119 limitation of the GAS structure. Linn Crosetto (linn@hp.com).
1121 _OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
1122 return from this interface. Handles a possible timeout case if
1123 ACPI_WAIT_FOREVER is modified by the host to be a value less than
1124 "forever". Jung-uk Kim.
1126 Predefined name support: Add allowed/required argument type information
1128 the master predefined info table. This change adds the infrastructure to
1129 enable typechecking on incoming arguments for all predefined
1130 methods/objects. It does not actually contain the code that will fully
1131 utilize this information, this is still under development. Also condenses
1132 some duplicate code for the predefined names into a new module,
1133 utilities/utpredef.c
1135 Example Code and Data Size: These are the sizes for the OS-independent
1136 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1137 debug version of the code includes the debug output trace mechanism and
1138 has a much larger code and data size.
1141 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
1142 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
1144 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
1145 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
1148 2) iASL Compiler/Disassembler and Tools:
1150 iASL: Implemented a new option to simplify the development of ACPI-
1152 BIOS code. Adds support for a new "offset table" output file. The -so
1153 option will create a C table containing the AML table offsets of various
1154 named objects in the namespace so that BIOS code can modify them easily
1156 boot time. This can simplify BIOS runtime code by eliminating expensive
1157 searches for "magic values", enhancing boot times and adding greater
1158 reliability. With assistance from Lee Hamel.
1160 iASL: Allow additional predefined names to return zero-length packages.
1161 Now, all predefined names that are defined by the ACPI specification to
1162 return a "variable-length package of packages" are allowed to return a
1163 zero length top-level package. This allows the BIOS to tell the host that
1164 the requested feature is not supported, and supports existing BIOS/ASL
1167 iASL: Changed the "result not used" warning to an error. This is the case
1168 where an ASL operator is effectively a NOOP because the result of the
1169 operation is not stored anywhere. For example:
1171 There is no target (missing 3rd argument), nor is the function return
1172 value used. This is potentially a very serious problem -- since the code
1173 was probably intended to do something, but for whatever reason, the value
1174 was not stored. Therefore, this issue has been upgraded from a warning to
1177 AcpiHelp: Added allowable/required argument types to the predefined names
1178 info display. This feature utilizes the recent update to the predefined
1179 names table (above).
1181 ----------------------------------------
1182 14 February 2013. Summary of changes for version 20130214:
1184 1) ACPICA Kernel-resident Subsystem:
1186 Fixed a possible regression on some hosts: Reinstated the safe return
1187 macros (return_ACPI_STATUS, etc.) that ensure that the argument is
1188 evaluated only once. Although these macros are not needed for the ACPICA
1189 code itself, they are often used by ACPI-related host device drivers
1191 the safe feature may be necessary.
1193 Fixed several issues related to the ACPI 5.0 reduced hardware support
1194 (SOC): Now ensure that if the platform declares itself as hardware-
1196 via the FADT, the following functions become NOOPs (and always return
1197 AE_OK) because ACPI is always enabled by definition on these machines:
1203 Dynamic Object Repair: Implemented additional runtime repairs for
1204 predefined name return values. Both of these repairs can simplify code in
1205 the related device drivers that invoke these methods:
1206 1) For the _STR and _MLS names, automatically repair/convert an ASCII
1207 string to a Unicode buffer.
1208 2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
1210 lone end tag descriptor in the following cases: A Return(0) was executed,
1211 a null buffer was returned, or no object at all was returned (non-slack
1212 mode only). Adds a new file, nsconvert.c
1213 ACPICA BZ 998. Bob Moore, Lv Zheng.
1215 Resource Manager: Added additional code to prevent possible infinite
1217 while traversing corrupted or ill-formed resource template buffers. Check
1218 for zero-length resource descriptors in all code that loops through
1219 resource templates (the length field is used to index through the
1220 template). This change also hardens the external AcpiWalkResources and
1221 AcpiWalkResourceBuffer interfaces.
1223 Local Cache Manager: Enhanced the main data structure to eliminate an
1224 unnecessary mechanism to access the next object in the list. Actually
1225 provides a small performance enhancement for hosts that use the local
1226 ACPICA cache manager. Jung-uk Kim.
1228 Example Code and Data Size: These are the sizes for the OS-independent
1229 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1230 debug version of the code includes the debug output trace mechanism and
1231 has a much larger code and data size.
1234 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
1235 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
1237 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
1238 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
1241 2) iASL Compiler/Disassembler and Tools:
1243 iASL/Disassembler: Fixed several issues with the definition of the ACPI
1244 5.0 RASF table (RAS Feature Table). This change incorporates late changes
1245 that were made to the ACPI 5.0 specification.
1247 iASL/Disassembler: Added full support for the following new ACPI tables:
1248 1) The MTMR table (MID Timer Table)
1249 2) The VRTC table (Virtual Real Time Clock Table).
1250 Includes header file, disassembler, table compiler, and template support
1253 iASL: Implemented compile-time validation of package objects returned by
1254 predefined names. This new feature validates static package objects
1255 returned by the various predefined names defined to return packages. Both
1256 object types and package lengths are validated, for both parent packages
1257 and sub-packages, if any. The code is similar in structure and behavior
1259 the runtime repair mechanism within the AML interpreter and uses the
1260 existing predefined name information table. Adds a new file, aslprepkg.c.
1263 iASL: Implemented auto-detection of binary ACPI tables for disassembly.
1264 This feature detects a binary file with a valid ACPI table header and
1265 invokes the disassembler automatically. Eliminates the need to
1266 specifically invoke the disassembler with the -d option. ACPICA BZ 862.
1268 iASL/Disassembler: Added several warnings for the case where there are
1269 unresolved control methods during the disassembly. This can potentially
1270 cause errors when the output file is compiled, because the disassembler
1271 assumes zero method arguments in these cases (it cannot determine the
1272 actual number of arguments without resolution/definition of the method).
1274 Debugger: Added support to display all resources with a single command.
1275 Invocation of the resources command with no arguments will now display
1277 resources within the current namespace.
1279 AcpiHelp: Added descriptive text for each ACPICA exception code displayed
1282 ----------------------------------------
1283 17 January 2013. Summary of changes for version 20130117:
1285 1) ACPICA Kernel-resident Subsystem:
1287 Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
1288 return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
1289 objects to return a package containing one integer, most BIOS code
1291 two integers and the previous code reflects that. However, we also need
1293 support BIOS code that actually implements to the ACPI spec, and this
1294 change reflects this.
1296 Fixed two issues with the ACPI_DEBUG_PRINT macros:
1297 1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
1298 C compilers that require this support.
1299 2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
1300 ACPI_DEBUG is already used by many of the various hosts.
1302 Updated all ACPICA copyrights and signons to 2013. Added the 2013
1303 copyright to all module headers and signons, including the standard Linux
1304 header. This affects virtually every file in the ACPICA core subsystem,
1305 iASL compiler, all ACPICA utilities, and the test suites.
1307 Example Code and Data Size: These are the sizes for the OS-independent
1308 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1309 debug version of the code includes the debug output trace mechanism and
1310 has a much larger code and data size.
1313 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
1314 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
1316 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
1317 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
1320 2) iASL Compiler/Disassembler and Tools:
1322 Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
1323 prevent a possible fault on some hosts. Some C libraries modify the arg
1324 pointer parameter to vfprintf making it difficult to call it twice in the
1325 AcpiOsVprintf function. Use a local buffer to workaround this issue. This
1326 does not affect the Windows OSL since the Win C library does not modify
1327 the arg pointer. Chao Guan, Bob Moore.
1329 iASL: Fixed a possible infinite loop when the maximum error count is
1330 reached. If an output file other than the .AML file is specified (such as
1331 a listing file), and the maximum number of errors is reached, do not
1332 attempt to flush data to the output file(s) as the compiler is aborting.
1333 This can cause an infinite loop as the max error count code essentially
1334 keeps calling itself.
1336 iASL/Disassembler: Added an option (-in) to ignore NOOP
1338 Implemented for both the compiler and the disassembler. Often, the NOOP
1339 opcode is used as padding for packages that are changed dynamically by
1341 BIOS. When disassembled and recompiled, these NOOPs will cause syntax
1342 errors. This option causes the disassembler to ignore all NOOP opcodes
1343 (0xA3), and it also causes the compiler to ignore all ASL source code
1347 Debugger: Enhanced the Sleep command to execute all sleep states. This
1348 change allows Sleep to be invoked with no arguments and causes the
1349 debugger to execute all of the sleep states, 0-5, automatically.
1351 ----------------------------------------
1352 20 December 2012. Summary of changes for version 20121220:
1354 1) ACPICA Kernel-resident Subsystem:
1356 Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
1357 alternate entry point for AcpiWalkResources and improves the usability of
1358 the resource manager by accepting as input a buffer containing the output
1359 of either a _CRS, _PRS, or _AEI method. The key functionality is that the
1360 input buffer is not deleted by this interface so that it can be used by
1361 the host later. See the ACPICA reference for details.
1363 Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
1364 (DSDT version < 2). The constant will be truncated and this warning
1365 reflects that behavior.
1367 Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
1368 ExtendedInterrupt, and GpioInt descriptors. This change adds support to
1369 both get and set the new wake bit in these descriptors, separately from
1370 the existing share bit. Reported by Aaron Lu.
1372 Interpreter: Fix Store() when an implicit conversion is not possible. For
1373 example, in the cases such as a store of a string to an existing package
1374 object, implement the store as a CopyObject(). This is a small departure
1375 from the ACPI specification which states that the control method should
1377 aborted in this case. However, the ASLTS suite depends on this behavior.
1379 Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
1380 macros: check if debug output is currently enabled as soon as possible to
1381 minimize performance impact if debug is in fact not enabled.
1383 Source code restructuring: Cleanup to improve modularity. The following
1384 new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
1385 psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
1386 Associated makefiles and project files have been updated.
1388 Changed an exception code for LoadTable operator. For the case where one
1389 of the input strings is too long, change the returned exception code from
1390 AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
1392 Fixed a possible memory leak in dispatcher error path. On error, delete
1393 the mutex object created during method mutex creation. Reported by
1394 tim.gardner@canonical.com.
1396 Example Code and Data Size: These are the sizes for the OS-independent
1397 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1398 debug version of the code includes the debug output trace mechanism and
1399 has a much larger code and data size.
1402 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
1403 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
1405 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
1406 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
1409 2) iASL Compiler/Disassembler and Tools:
1411 iASL: Disallow a method call as argument to the ObjectType ASL operator.
1412 This change tracks an errata to the ACPI 5.0 document. The AML grammar
1413 will not allow the interpreter to differentiate between a method and a
1414 method invocation when these are used as an argument to the ObjectType
1415 operator. The ACPI specification change is to disallow a method
1417 (UserTerm) for the ObjectType operator.
1419 Finish support for the TPM2 and CSRT tables in the headers, table
1420 compiler, and disassembler.
1422 Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
1423 always expires immediately if the semaphore is not available. The
1425 code was using a relative-time timeout, but sem_timedwait requires the
1427 of an absolute time.
1429 iASL: Added a remark if the Timer() operator is used within a 32-bit
1430 table. This operator returns a 64-bit time value that will be truncated
1431 within a 32-bit table.
1433 iASL Source code restructuring: Cleanup to improve modularity. The
1434 following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
1435 aslmethod.c, and aslfileio.c. Associated makefiles and project files have
1439 ----------------------------------------
1440 14 November 2012. Summary of changes for version 20121114:
1442 1) ACPICA Kernel-resident Subsystem:
1444 Implemented a performance enhancement for ACPI/AML Package objects. This
1445 change greatly increases the performance of Package objects within the
1446 interpreter. It changes the processing of reference counts for packages
1448 optimizing for the most common case where the package sub-objects are
1449 either Integers, Strings, or Buffers. Increases the overall performance
1451 the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
1453 Chao Guan. ACPICA BZ 943.
1455 Implemented and deployed common macros to extract flag bits from resource
1456 descriptors. Improves readability and maintainability of the code. Fixes
1458 problem with the UART serial bus descriptor for the number of data bits
1459 flags (was incorrectly 2 bits, should be 3).
1461 Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
1462 of the macros and changed the SETx macros to the style of (destination,
1463 source). Also added ACPI_CASTx companion macros. Lv Zheng.
1465 Example Code and Data Size: These are the sizes for the OS-independent
1466 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1467 debug version of the code includes the debug output trace mechanism and
1468 has a much larger code and data size.
1471 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
1472 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
1474 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
1475 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
1478 2) iASL Compiler/Disassembler and Tools:
1480 Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
1481 adds the ShareAndWake and ExclusiveAndWake flags which were added to the
1482 Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
1484 Disassembler: Fixed a problem with external declaration generation. Fixes
1485 a problem where an incorrect pathname could be generated for an external
1486 declaration if the original reference to the object includes leading
1487 carats (^). ACPICA BZ 984.
1489 Debugger: Completed a major update for the Disassemble<method> command.
1490 This command was out-of-date and did not properly disassemble control
1491 methods that had any reasonable complexity. This fix brings the command
1493 to the same level as the rest of the disassembler. Adds one new file,
1494 dmdeferred.c, which is existing code that is now common with the main
1495 disassembler and the debugger disassemble command. ACPICA MZ 978.
1497 iASL: Moved the parser entry prototype to avoid a duplicate declaration.
1498 Newer versions of Bison emit this prototype, so moved the prototype out
1500 the iASL header to where it is actually used in order to avoid a
1504 iASL/Tools: Standardized use of the stream I/O functions:
1505 1) Ensure check for I/O error after every fopen/fread/fwrite
1506 2) Ensure proper order of size/count arguments for fread/fwrite
1507 3) Use test of (Actual != Requested) after all fwrite, and most fread
1508 4) Standardize I/O error messages
1509 Improves reliability and maintainability of the code. Bob Moore, Lv
1513 Disassembler: Prevent duplicate External() statements. During generation
1514 of external statements, detect similar pathnames that are actually
1515 duplicates such as these:
1518 Remove all leading '\' characters from pathnames during the external
1519 statement generation so that duplicates will be detected and tossed.
1522 Tools: Replace low-level I/O with stream I/O functions. Replace
1523 open/read/write/close with the stream I/O equivalents
1524 fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
1527 AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
1528 name header so that AcpiXtract recognizes the output file/table.
1530 iASL: Remove obsolete -2 option flag. Originally intended to force the
1531 compiler/disassembler into an ACPI 2.0 mode, this was never implemented
1532 and the entire concept is now obsolete.
1534 ----------------------------------------
1535 18 October 2012. Summary of changes for version 20121018:
1538 1) ACPICA Kernel-resident Subsystem:
1540 Updated support for the ACPI 5.0 MPST table. Fixes some problems
1541 introduced by late changes to the table as it was added to the ACPI 5.0
1542 specification. Includes header, disassembler, and data table compiler
1543 support as well as a new version of the MPST template.
1545 AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
1546 5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
1547 methods: _HID, _CID, and _UID.
1549 Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
1550 ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
1551 name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
1552 names for their various drivers. Affects the AcpiGetObjectInfo external
1553 interface, and other internal interfaces as well.
1555 Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
1556 This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
1557 on machines that support non-aligned transfers. Optimizes for this case
1558 rather than using a strncpy. With assistance from Zheng Lv.
1560 Resource Manager: Small fix for buffer size calculation. Fixed a one byte
1561 error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
1563 Added a new debug print message for AML mutex objects that are force-
1564 released. At control method termination, any currently acquired mutex
1565 objects are force-released. Adds a new debug-only message for each one
1568 Audited/updated all ACPICA return macros and the function debug depth
1569 counter: 1) Ensure that all functions that use the various TRACE macros
1570 also use the appropriate ACPICA return macros. 2) Ensure that all normal
1571 return statements surround the return expression (value) with parens to
1572 ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
1573 Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
1575 Global source code changes/maintenance: All extra lines at the start and
1576 end of each source file have been removed for consistency. Also, within
1577 comments, all new sentences start with a single space instead of a double
1578 space, again for consistency across the code base.
1580 Example Code and Data Size: These are the sizes for the OS-independent
1581 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1582 debug version of the code includes the debug output trace mechanism and
1583 has a much larger code and data size.
1586 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
1587 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
1589 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
1590 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
1593 2) iASL Compiler/Disassembler and Tools:
1595 AcpiExec: Improved the algorithm used for memory leak/corruption
1596 detection. Added some intelligence to the code that maintains the global
1597 list of allocated memory. The list is now ordered by allocated memory
1598 address, significantly improving performance. When running AcpiExec on
1599 the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
1600 on the platform and/or the environment. Note, this performance
1601 enhancement affects the AcpiExec utility only, not the kernel-resident
1604 Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
1605 the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
1606 incorrect table offset reported for invalid opcodes. Report the original
1607 32-bit value for bad ACPI_NAMEs (as well as the repaired name.)
1609 Disassembler: Enhanced the -vt option to emit the binary table data in
1610 hex format to assist with debugging.
1612 Fixed a potential filename buffer overflow in osunixdir.c. Increased the
1613 size of file structure. Colin Ian King.
1615 ----------------------------------------
1616 13 September 2012. Summary of changes for version 20120913:
1619 1) ACPICA Kernel-resident Subsystem:
1621 ACPI 5.0: Added two new notify types for the Hardware Error Notification
1622 Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
1626 Table Manager: Merged/removed duplicate code in the root table resize
1627 functions. One function is external, the other is internal. Lv Zheng,
1631 Makefiles: Completely removed the obsolete "Linux" makefiles under
1632 acpica/generate/linux. These makefiles are obsolete and have been
1635 the generic unix makefiles under acpica/generate/unix.
1637 Makefiles: Ensure that binary files always copied properly. Minor rule
1639 to ensure that the final binary output files are always copied up to the
1640 appropriate binary directory (bin32 or bin64.)
1642 Example Code and Data Size: These are the sizes for the OS-independent
1643 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1645 version of the code includes the debug output trace mechanism and has a
1647 larger code and data size.
1650 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
1651 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
1653 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
1654 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
1657 2) iASL Compiler/Disassembler and Tools:
1659 Disassembler: Fixed a possible fault during the disassembly of resource
1660 descriptors when a second parse is required because of the invocation of
1661 external control methods within the table. With assistance from
1662 adq@lidskialf.net. ACPICA BZ 976.
1664 iASL: Fixed a namepath optimization problem. An error can occur if the
1666 node that contains the namepath to be optimized does not have a parent
1668 that is a named object. This change fixes the problem.
1670 iASL: Fixed a regression where the AML file is not deleted on errors. The
1672 output file should be deleted if there are any errors during the
1675 only exception is if the -f (force output) option is used. ACPICA BZ 974.
1677 iASL: Added a feature to automatically increase internal line buffer
1679 Via realloc(), automatically increase the internal line buffer sizes as
1680 necessary to support very long source code lines. The current version of
1682 preprocessor requires a buffer long enough to contain full source code
1684 This change increases the line buffer(s) if the input lines go beyond the
1685 current buffer size. This eliminates errors that occurred when a source
1687 line was longer than the buffer.
1689 iASL: Fixed a problem with constant folding in method declarations. The
1690 SyncLevel term is a ByteConstExpr, and incorrect code would be generated
1692 Type3 opcode was used.
1694 Debugger: Improved command help support. For incorrect argument count,
1696 full help for the command. For help command itself, allow an argument to
1699 Test Suites: Several bug fixes for the ASLTS suite reduces the number of
1700 errors during execution of the suite. Guan Chao.
1702 ----------------------------------------
1703 16 August 2012. Summary of changes for version 20120816:
1706 1) ACPICA Kernel-resident Subsystem:
1708 Removed all use of the deprecated _GTS and _BFS predefined methods. The
1710 (Going To Sleep) and _BFS (Back From Sleep) methods are essentially
1711 deprecated and will probably be removed from the ACPI specification.
1713 does not invoke them, and reportedly never will. The final nail in the
1715 is that the ACPI specification states that these methods must be run with
1716 interrupts off, which is not going to happen in a kernel interpreter.
1718 Linux has removed all use of the methods also. It was discovered that
1719 invoking these functions caused failures on some machines, probably
1721 they were never tested since Windows does not call them. Affects two
1723 interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
1726 Implemented support for complex bit-packed buffers returned from the _PLD
1727 (Physical Location of Device) predefined method. Adds a new external
1728 interface, AcpiDecodePldBuffer that parses the buffer into a more usable
1730 structure. Note: C Bitfields cannot be used for this type of predefined
1731 structure since the memory layout of individual bitfields is not defined
1733 the C language. In addition, there are endian concerns where a compiler
1735 change the bitfield ordering based on the machine type. The new ACPICA
1736 interface eliminates these issues, and should be called after _PLD is
1737 executed. ACPICA BZ 954.
1739 Implemented a change to allow a scope change to root (via "Scope (\)")
1741 execution of module-level ASL code (code that is executed at table load
1744 Added the Windows8/Server2012 string for the _OSI method. This change
1747 new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
1750 Added header support for the new ACPI tables DBG2 (Debug Port Table Type
1752 and CSRT (Core System Resource Table).
1754 Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
1755 names. This simplifies access to the buffers returned by these predefined
1756 names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
1758 GPE support: Removed an extraneous parameter from the various low-level
1759 internal GPE functions. Tang Feng.
1761 Removed the linux makefiles from the unix packages. The generate/linux
1762 makefiles are obsolete and have been removed from the unix tarball
1764 packages. The replacement makefiles are under generate/unix, and there is
1766 top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
1768 Updates for Unix makefiles:
1769 1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
1770 2) Update linker flags (move to end of command line) for AcpiExec
1774 Split ACPICA initialization functions to new file, utxfinit.c. Split from
1775 utxface.c to improve modularity and reduce file size.
1777 Example Code and Data Size: These are the sizes for the OS-independent
1778 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1779 debug version of the code includes the debug output trace mechanism and
1781 much larger code and data size.
1784 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
1785 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
1787 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
1788 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
1791 2) iASL Compiler/Disassembler and Tools:
1793 iASL: Fixed a problem with constant folding for fixed-length constant
1794 expressions. The constant-folding code was not being invoked for constant
1795 expressions that allow the use of type 3/4/5 opcodes to generate
1797 for expressions such as ByteConstExpr, WordConstExpr, etc. This could
1799 in the generation of invalid AML bytecode. ACPICA BZ 970.
1801 iASL: Fixed a generation issue on newer versions of Bison. Newer versions
1802 apparently automatically emit some of the necessary externals. This
1804 handles these versions in order to eliminate generation warnings.
1806 Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
1808 Disassembler: Add support to decode _PLD buffers. The decoded buffer
1810 within comments in the output file.
1812 Debugger: Fixed a regression with the "Threads" command where
1813 AE_BAD_PARAMETER was always returned.
1815 ----------------------------------------
1816 11 July 2012. Summary of changes for version 20120711:
1818 1) ACPICA Kernel-resident Subsystem:
1820 Fixed a possible fault in the return package object repair code. Fixes a
1821 problem that can occur when a lone package object is wrapped with an
1823 package object in order to force conformance to the ACPI specification.
1825 affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
1829 Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
1830 PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
1831 ARB_DIS bit must be implemented in the host-dependent C3 processor power
1833 support. Note, ARB_DIS is obsolete and only applies to older chipsets,
1835 Intel and other vendors. (for Intel: ICH4-M and earlier)
1837 This change removes the code to disable/enable bus master arbitration
1839 suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
1841 resume problems on some machines. The change has been in use for over
1845 Implemented two new external interfaces to support host-directed dynamic
1847 table load and unload. They are intended to simplify the host
1849 of hot-plug support:
1850 AcpiLoadTable: Load an SSDT from a buffer into the namespace.
1851 AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
1853 See the ACPICA reference for additional details. Adds one new file,
1854 components/tables/tbxfload.c
1856 Implemented and deployed two new interfaces for errors and warnings that
1858 known to be caused by BIOS/firmware issues:
1859 AcpiBiosError: Prints "ACPI Firmware Error" message.
1860 AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
1861 Deployed these new interfaces in the ACPICA Table Manager code for ACPI
1863 and FADT errors. Additional deployment to be completed as appropriate in
1865 future. The associated conditional macros are ACPI_BIOS_ERROR and
1866 ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
1871 Implicit notify support: ensure that no memory allocation occurs within a
1872 critical region. This fix moves a memory allocation outside of the time
1874 spinlock is held. Fixes issues on systems that do not allow this
1878 Split exception code utilities and tables into a new file,
1881 Example Code and Data Size: These are the sizes for the OS-independent
1882 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1884 version of the code includes the debug output trace mechanism and has a
1886 larger code and data size.
1889 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
1890 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
1892 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
1893 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
1896 2) iASL Compiler/Disassembler and Tools:
1898 iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
1902 Debugger: Enhanced the "tables" command to emit additional information
1904 the current set of ACPI tables, including the owner ID and flags decode.
1906 Debugger: Reimplemented the "unload" command to use the new
1907 AcpiUnloadParentTable external interface. This command was disable
1909 due to need for an unload interface.
1911 AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
1913 will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
1915 ----------------------------------------
1916 20 June 2012. Summary of changes for version 20120620:
1919 1) ACPICA Kernel-resident Subsystem:
1921 Implemented support to expand the "implicit notify" feature to allow
1923 devices to be notified by a single GPE. This feature automatically
1925 runtime device notification in the absence of a BIOS-provided GPE control
1926 method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
1928 provided by ACPICA for Windows compatibility, and is a workaround for
1931 code errors. See the description of the AcpiSetupGpeForWake interface in
1933 APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
1935 Changed some comments and internal function names to simplify and ensure
1936 correctness of the Linux code translation. No functional changes.
1938 Example Code and Data Size: These are the sizes for the OS-independent
1939 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1941 version of the code includes the debug output trace mechanism and has a
1943 larger code and data size.
1946 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
1947 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
1949 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
1950 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
1953 2) iASL Compiler/Disassembler and Tools:
1955 Disassembler: Added support to emit short, commented descriptions for the
1957 predefined names in order to improve the readability of the disassembled
1958 output. ACPICA BZ 959. Changes include:
1959 1) Emit descriptions for all standard predefined names (_INI, _STA,
1962 2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
1963 3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
1966 AcpiSrc: Fixed several long-standing Linux code translation issues.
1968 descriptions in function headers are now translated properly to lower
1971 underscores. ACPICA BZ 961. Also fixes translation problems such as
1977 local_fADT -> local_FADT
1978 execute_oSI -> execute_OSI
1980 iASL: Fixed a problem where null bytes were inadvertently emitted into
1984 iASL: Added the existing debug options to the standard help screen. There
1986 no longer two different help screens. ACPICA BZ 957.
1988 AcpiHelp: Fixed some typos in the various predefined name descriptions.
1990 expand some of the descriptions where appropriate.
1992 iASL: Fixed the -ot option (display compile times/statistics). Was not
1994 properly for standard output; only worked for the debug file case.
1996 ----------------------------------------
1997 18 May 2012. Summary of changes for version 20120518:
2000 1) ACPICA Core Subsystem:
2002 Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
2004 to block until asynchronous events such as notifies and GPEs have
2006 Within ACPICA, it is only called before a notify or GPE handler is
2007 removed/uninstalled. It also may be useful for the host OS within related
2008 drivers such as the Embedded Controller driver. See the ACPICA reference
2010 additional information. ACPICA BZ 868.
2012 ACPI Tables: Added a new error message for a possible overflow failure
2014 the conversion of FADT 32-bit legacy register addresses to internal
2017 bit GAS structure representation. The GAS has a one-byte "bit length"
2019 thus limiting the register length to 255 bits. ACPICA BZ 953.
2021 Example Code and Data Size: These are the sizes for the OS-independent
2022 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2024 version of the code includes the debug output trace mechanism and has a
2026 larger code and data size.
2029 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
2030 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
2032 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
2033 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
2036 2) iASL Compiler/Disassembler and Tools:
2038 iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
2040 This keyword was added late in the ACPI 5.0 release cycle and was not
2041 implemented until now.
2043 Disassembler: Added support for Operation Region externals. Adds missing
2044 support for operation regions that are defined in another table, and
2045 referenced locally via a Field or BankField ASL operator. Now generates
2047 correct External statement.
2049 Disassembler: Several additional fixes for the External() statement
2051 related to some ASL operators. Also, order the External() statements
2052 alphabetically in the disassembler output. Fixes the External()
2055 the Create* field, Alias, and Scope operators:
2056 1) Create* buffer field operators - fix type mismatch warning on
2058 2) Alias - implement missing External support
2059 3) Scope - fix to make sure all necessary externals are emitted.
2061 iASL: Improved pathname support. For include files, merge the prefix
2063 with the file pathname and eliminate unnecessary components. Convert
2064 backslashes in all pathnames to forward slashes, for readability. Include
2066 pathname changes affect both #include and Include() type operators.
2068 iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
2070 of a valid line by inserting a newline and then returning the EOF during
2072 next call to GetNextLine. Prevents the line from being ignored due to EOF
2075 iASL: Implemented some changes to enhance the IDE support (-vi option.)
2077 and Warning messages are now correctly recognized for both the source
2079 browser and the global error and warning counts.
2081 ----------------------------------------
2082 20 April 2012. Summary of changes for version 20120420:
2085 1) ACPICA Core Subsystem:
2087 Implemented support for multiple notify handlers. This change adds
2090 allow multiple system and device notify handlers on Device, Thermal Zone,
2092 Processor objects. This can simplify the host OS notification
2094 Also re-worked and restructured the entire notify support code to
2096 handler installation, handler removal, notify event queuing, and notify
2097 dispatch to handler(s). Note: there can still only be two global notify
2098 handlers - one for system notifies and one for device notifies. There are
2100 changes to the existing handler install/remove interfaces. Lin Ming, Bob
2101 Moore, Rafael Wysocki.
2103 Fixed a regression in the package repair code where the object reference
2104 count was calculated incorrectly. Regression was introduced in the commit
2105 "Support to add Package wrappers".
2107 Fixed a couple possible memory leaks in the AML parser, in the error
2109 path. Jesper Juhl, Lin Ming.
2111 Example Code and Data Size: These are the sizes for the OS-independent
2112 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2113 debug version of the code includes the debug output trace mechanism and
2115 much larger code and data size.
2118 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
2119 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
2121 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
2122 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
2125 2) iASL Compiler/Disassembler and Tools:
2127 iASL: Fixed a problem with the resource descriptor support where the
2129 of the StartDependentFn and StartDependentFnNoPrio descriptors were not
2130 included in cumulative descriptor offset, resulting in incorrect values
2132 resource tags within resource descriptors appearing after a
2134 descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
2136 iASL and Preprocessor: Implemented full support for the #line directive
2138 correctly track original source file line numbers through the .i
2140 output file - for error and warning messages.
2142 iASL: Expand the allowable byte constants for address space IDs.
2144 the allowable range was 0x80-0xFF (user-defined spaces), now the range is
2145 0x0A-0xFF to allow for custom and new IDs without changing the compiler.
2147 iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
2149 iASL: Add option to completely disable the preprocessor (-Pn).
2151 iASL: Now emit all error/warning messages to standard error (stderr) by
2152 default (instead of the previous stdout).
2154 ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
2156 for resource descriptor offset fix above. Update/cleanup error output
2157 routines. Enable and send iASL errors/warnings to an error logfile
2158 (error.txt). Send all other iASL output to a logfile (compiler.txt).
2160 several extraneous "unrecognized operator" messages.
2162 ----------------------------------------
2163 20 March 2012. Summary of changes for version 20120320:
2166 1) ACPICA Core Subsystem:
2168 Enhanced the sleep/wake interfaces to optionally execute the _GTS method
2169 (Going To Sleep) and the _BFS method (Back From Sleep). Windows
2171 does not execute these methods, and therefore these methods are often
2172 untested. It has been seen on some systems where the execution of these
2173 methods causes errors and also prevents the machine from entering S5. It
2175 therefore suggested that host operating systems do not execute these
2177 by default. In the future, perhaps these methods can be optionally
2179 based on the age of the system and/or what is the newest version of
2181 that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
2183 AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
2186 Fixed a problem where the length of the local/common FADT was set too
2188 The local FADT table length cannot be set to the common length until the
2189 original length has been examined. There is code that checks the table
2191 and sets various fields appropriately. This can affect older machines
2193 early FADT versions. For example, this can cause inadvertent writes to
2195 CST_CNT register. Julian Anastasov.
2197 Fixed a mapping issue related to a physical table override. Use the
2199 mapping mechanism for tables loaded via the physical override OSL
2201 This allows for early mapping before the virtual memory manager is
2203 Thomas Renninger, Bob Moore.
2205 Enhanced the automatic return-object repair code: Repair a common problem
2207 predefined methods that are defined to return a variable-length Package
2209 sub-objects. If there is only one sub-object, some BIOS ASL code
2211 simply returns the single object instead of a Package with one sub-
2213 This new support will repair this error by wrapping a Package object
2215 the original object, creating the correct and expected Package with one
2217 object. Names that can be repaired in this manner include: _ALR, _CSD,
2219 _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
2222 Changed the exception code returned for invalid ACPI paths passed as
2223 parameters to external interfaces such as AcpiEvaluateObject. Was
2224 AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
2226 Example Code and Data Size: These are the sizes for the OS-independent
2227 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2229 version of the code includes the debug output trace mechanism and has a
2231 larger code and data size.
2234 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
2235 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
2237 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
2238 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
2241 2) iASL Compiler/Disassembler and Tools:
2243 iASL: Added the infrastructure and initial implementation of a integrated
2245 like preprocessor. This will simplify BIOS development process by
2247 the need for a separate preprocessing step during builds. On Windows, it
2249 eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
2250 features including full #define() macro support are still under
2252 These preprocessor directives are supported:
2265 In addition, these new command line options are supported:
2266 -D <symbol> Define symbol for preprocessor use
2267 -li Create preprocessed output file (*.i)
2268 -P Preprocess only and create preprocessor output file (*.i)
2270 Table Compiler: Fixed a problem where the equals operator within an
2272 did not work properly.
2274 Updated iASL to use the current versions of Bison/Flex. Updated the
2276 project file to invoke these tools from the standard location. ACPICA BZ
2279 Flex for Windows: V2.5.4
2280 Bison for Windows: V2.4.1
2282 ----------------------------------------
2283 15 February 2012. Summary of changes for version 20120215:
2286 1) ACPICA Core Subsystem:
2288 There have been some major changes to the sleep/wake support code, as
2289 described below (a - e).
2291 a) The AcpiLeaveSleepState has been split into two interfaces, similar to
2292 AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
2293 AcpiLeaveSleepStatePrep. This allows the host to perform actions between
2295 time the _BFS method is called and the _WAK method is called. NOTE: all
2297 must update their wake/resume code or else sleep/wake will not work
2301 b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
2303 method. Some machines require that the GPEs are enabled before the _WAK
2305 is executed. Thomas Renninger.
2307 c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
2309 Some BIOS code assumes that WAK_STS will be cleared on resume and use it
2311 determine whether the system is rebooting or resuming. Matthew Garrett.
2313 d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
2315 match the ACPI specification requirement. Rafael Wysocki.
2317 e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
2318 registers within the V5 FADT. This support adds two new files:
2319 hardware/hwesleep.c implements the support for the new registers. Moved
2321 sleep/wake external interfaces to hardware/hwxfsleep.c.
2324 Added a new OSL interface for ACPI table overrides,
2325 AcpiOsPhysicalTableOverride. This interface allows the host to override a
2326 table via a physical address, instead of the logical address required by
2327 AcpiOsTableOverride. This simplifies the host implementation. Initial
2328 implementation by Thomas Renninger. The ACPICA implementation creates a
2330 shared function for table overrides that attempts both a logical and a
2333 Expanded the OSL memory read/write interfaces to 64-bit data
2334 (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
2335 transfer support for GAS register structures passed to AcpiRead and
2338 Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
2340 build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
2342 See the ACPICA reference for details. ACPICA BZ 942. This option removes
2344 10% of the code and 5% of the static data, and the following hardware
2346 features become unavailable:
2347 PM Event and Control registers
2348 SCI interrupt (and handler)
2350 General Purpose Events (GPEs)
2353 FACS table (Waking vectors and Global Lock)
2355 Updated the unix tarball directory structure to match the ACPICA git
2357 tree. This ensures that the generic unix makefiles work properly (in
2358 generate/unix). Also updated the Linux makefiles to match. ACPICA BZ
2361 Updated the return value of the _REV predefined method to integer value 5
2363 reflect ACPI 5.0 support.
2365 Moved the external ACPI PM timer interface prototypes to the public
2367 file where they belong.
2369 Example Code and Data Size: These are the sizes for the OS-independent
2370 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2372 version of the code includes the debug output trace mechanism and has a
2374 larger code and data size.
2377 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
2378 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
2380 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
2381 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
2384 2) iASL Compiler/Disassembler and Tools:
2386 Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
2387 descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
2388 incorrectly displayed.
2390 AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
2393 ----------------------------------------
2394 11 January 2012. Summary of changes for version 20120111:
2397 1) ACPICA Core Subsystem:
2399 Implemented a new mechanism to allow host device drivers to check for
2401 range conflicts with ACPI Operation Regions. Both SystemMemory and
2403 address spaces are supported. A new external interface,
2404 AcpiCheckAddressRange,
2405 allows drivers to check an address range against the ACPI namespace. See
2407 ACPICA reference for additional details. Adds one new file,
2408 utilities/utaddress.c. Lin Ming, Bob Moore.
2410 Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
2413 Status registers, update the ACPI 5.0 flags, and update internal data
2414 structures to handle an FADT larger than 256 bytes. The size of the ACPI
2418 Updated all ACPICA copyrights and signons to 2012. Added the 2012
2420 all module headers and signons, including the standard Linux header. This
2421 affects virtually every file in the ACPICA core subsystem, iASL compiler,
2423 all ACPICA utilities.
2425 Example Code and Data Size: These are the sizes for the OS-independent
2426 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2428 version of the code includes the debug output trace mechanism and has a
2430 larger code and data size.
2433 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
2434 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
2436 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
2437 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
2440 2) iASL Compiler/Disassembler and Tools:
2442 Disassembler: fixed a problem with the automatic resource tag generation
2443 support. Fixes a problem where the resource tags are inadvertently not
2444 constructed if the table being disassembled contains external references
2446 control methods. Moved the actual construction of the tags to after the
2448 namespace is constructed (after 2nd parse is invoked due to external
2450 method references.) ACPICA BZ 941.
2452 Table Compiler: Make all "generic" operators caseless. These are the
2454 like UINT8, String, etc. Making these caseless improves ease-of-use.
2458 ----------------------------------------
2459 23 November 2011. Summary of changes for version 20111123:
2461 0) ACPI 5.0 Support:
2463 This release contains full support for the ACPI 5.0 specification, as
2466 Reduced Hardware Support:
2467 -------------------------
2469 This support allows for ACPI systems without the usual ACPI hardware.
2471 support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
2473 not attempt to initialize or use any of the usual ACPI hardware. Note,
2475 this flag is set, all of the following ACPI hardware is assumed to be not
2476 present and is not initialized or accessed:
2478 General Purpose Events (GPEs)
2479 Fixed Events (PM1a/PM1b and PM Control)
2480 Power Management Timer and Console Buttons (power/sleep)
2481 Real-time Clock Alarm
2483 System Control Interrupt (SCI)
2484 The FACS is assumed to be non-existent
2489 All new tables and updates to existing tables are fully supported in the
2490 ACPICA headers (for use by device drivers), the disassembler, and the
2492 Data Table Compiler. ACPI 5.0 defines these new tables:
2494 BGRT /* Boot Graphics Resource Table */
2495 DRTM /* Dynamic Root of Trust for Measurement table */
2496 FPDT /* Firmware Performance Data Table */
2497 GTDT /* Generic Timer Description Table */
2498 MPST /* Memory Power State Table */
2499 PCCT /* Platform Communications Channel Table */
2500 PMTT /* Platform Memory Topology Table */
2501 RASF /* RAS Feature table */
2503 Operation Regions/SpaceIDs:
2504 ---------------------------
2506 All new operation regions are fully supported by the iASL compiler, the
2507 disassembler, and the ACPICA runtime code (for dispatch to region
2509 The new operation region Space IDs are:
2514 Resource Descriptors:
2515 ---------------------
2517 All new ASL resource descriptors are fully supported by the iASL
2520 ASL/AML disassembler, and the ACPICA runtime Resource Manager code
2522 all new predefined resource tags). New descriptors are:
2531 ASL/AML Operators, New and Modified:
2532 ------------------------------------
2534 One new operator is added, the Connection operator, which is used to
2536 a GeneralPurposeIo or GenericSerialBus resource descriptor with
2538 field objects within an operation region. Several new protocols are
2540 with the AccessAs operator. All are fully supported by the iASL compiler,
2541 disassembler, and runtime ACPICA AML interpreter:
2543 Connection // Declare Field Connection
2545 AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol
2546 AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes
2548 AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
2549 RawDataBuffer // Data type for Vendor Data
2552 Predefined ASL/AML Objects:
2553 ---------------------------
2555 All new predefined objects/control-methods are supported by the iASL
2557 and the ACPICA runtime validation/repair (arguments and return values.)
2559 predefined names include the following:
2561 Standard Predefined Names (Objects or Control Methods):
2562 _AEI, _CLS, _CPC, _CWS, _DEP,
2563 _DLM, _EVT, _GCP, _CRT, _GWS,
2564 _HRV, _PRE, _PSE, _SRT, _SUB.
2566 Resource Tags (Names used to access individual fields within resource
2568 _DBT, _DPL, _DRS, _END, _FLC,
2569 _IOR, _LIN, _MOD, _PAR, _PHA,
2570 _PIN, _PPI, _POL, _RXL, _SLV,
2571 _SPE, _STB, _TXL, _VEN.
2573 ACPICA External Interfaces:
2574 ---------------------------
2576 Several new interfaces have been defined for use by ACPI-related device
2577 drivers and other host OS services:
2579 AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
2581 acquire and release AML mutexes that are defined in the DSDT/SSDT tables
2582 provided by the BIOS. They are intended to be used in conjunction with
2584 ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
2585 mutual exclusion with the AML code/interpreter.
2587 AcpiGetEventResources: Returns the (formatted) resource descriptors as
2589 by the ACPI 5.0 _AEI object (ACPI Event Information). This object
2591 resource descriptors associated with hardware-reduced platform events,
2593 to the AcpiGetCurrentResources interface.
2595 Operation Region Handlers: For General Purpose IO and Generic Serial Bus
2596 operation regions, information about the Connection() object and any
2598 length information is passed to the region handler within the Context
2601 AcpiBufferToResource: This interface converts a raw AML buffer containing
2603 resource template or resource descriptor to the ACPI_RESOURCE internal
2605 suitable for use by device drivers. Can be used by an operation region
2607 to convert the Connection() buffer object into a ACPI_RESOURCE.
2609 Miscellaneous/Tools/TestSuites:
2610 -------------------------------
2612 Support for extended _HID names (Four alpha characters instead of three).
2613 Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
2614 Support for ACPI 5.0 features in the ASLTS test suite.
2615 Fully updated documentation (ACPICA and iASL reference documents.)
2617 ACPI Table Definition Language:
2618 -------------------------------
2620 Support for this language was implemented and released as a subsystem of
2622 iASL compiler in 2010. (See the iASL compiler User Guide.)
2625 Non-ACPI 5.0 changes for this release:
2626 --------------------------------------
2628 1) ACPICA Core Subsystem:
2630 Fix a problem with operation region declarations where a failure can
2633 the region name and an argument that evaluates to an object (such as the
2634 region address) are in different namespace scopes. Lin Ming, ACPICA BZ
2637 Do not abort an ACPI table load if an invalid space ID is found within.
2639 will be caught later if the offending method is executed. ACPICA BZ 925.
2641 Fixed an issue with the FFixedHW space ID where the ID was not always
2642 recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
2644 Fixed a problem with the 32-bit generation of the unix-specific OSL
2645 (osunixxf.c). Lin Ming, ACPICA BZ 936.
2647 Several changes made to enable generation with the GCC 4.6 compiler.
2651 New error messages: Unsupported I/O requests (not 8/16/32 bit), and
2653 field registers out-of-range.
2655 2) iASL Compiler/Disassembler and Tools:
2657 iASL: Implemented the __PATH__ operator, which returns the full pathname
2659 the current source file.
2661 AcpiHelp: Automatically display expanded keyword information for all ASL
2664 Debugger: Add "Template" command to disassemble/dump resource template
2667 Added a new master script to generate and execute the ASLTS test suite.
2668 Automatically handles 32- and 64-bit generation. See tests/aslts.sh
2670 iASL: Fix problem with listing generation during processing of the
2672 operator where AML listing was disabled until the entire Switch block was
2675 iASL: Improve support for semicolon statement terminators. Fix "invalid
2676 character" message for some cases when the semicolon is used. Semicolons
2678 now allowed after every <Term> grammar element. ACPICA BZ 927.
2680 iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
2683 Disassembler: Fix problem with disassembly of the DataTableRegion
2685 where an inadvertent "Unhandled deferred opcode" message could be
2688 3) Example Code and Data Size
2690 These are the sizes for the OS-independent acpica.lib produced by the
2691 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
2692 includes the debug output trace mechanism and has a much larger code and
2697 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
2698 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
2700 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
2701 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
2703 ----------------------------------------
2704 22 September 2011. Summary of changes for version 20110922:
2708 Support for ACPI 5.0 in ACPICA has been underway for several months and
2710 be released at the same time that ACPI 5.0 is officially released.
2712 The ACPI 5.0 specification is on track for release in the next few
2715 1) ACPICA Core Subsystem:
2717 Fixed a problem where the maximum sleep time for the Sleep() operator was
2718 intended to be limited to two seconds, but was inadvertently limited to
2722 Linux and Unix makefiles: Added header file dependencies to ensure
2724 generation of ACPICA core code and utilities. Also simplified the
2726 considerably through the use of the vpath variable to specify search
2730 2) iASL Compiler/Disassembler and Tools:
2732 iASL: Implemented support to check the access length for all fields
2734 access named Resource Descriptor fields. For example, if a resource field
2736 defined to be two bits, a warning is issued if a CreateXxxxField() is
2738 with an incorrect bit length. This is implemented for all current
2740 descriptor names. ACPICA BZ 930.
2742 Disassembler: Fixed a byte ordering problem with the output of 24-bit and
2746 iASL: Fixed a couple of issues associated with variable-length package
2747 objects. 1) properly handle constants like One, Ones, Zero -- do not make
2749 VAR_PACKAGE when these are used as a package length. 2) Allow the
2751 opcode (in addition to PACKAGE) when validating object types for
2755 iASL: Emit statistics for all output files (instead of just the ASL input
2757 AML output). Includes listings, hex files, etc.
2759 iASL: Added -G option to the table compiler to allow the compilation of
2761 ACPI tables. The only part of a table that is required is the standard
2766 AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
2768 which also adds correct 64-bit support. Also, now all output filenames
2770 completely lower case.
2772 AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
2773 loading table files. A warning is issued for any such tables. The only
2774 exception is an FADT. This also fixes a possible fault when attempting to
2776 non-AML tables. ACPICA BZ 932.
2778 AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
2780 missing table terminator could cause a fault when using the -p option.
2782 AcpiSrc: Fixed a possible divide-by-zero fault when generating file
2785 3) Example Code and Data Size
2787 These are the sizes for the OS-independent acpica.lib produced by the
2788 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
2789 includes the debug output trace mechanism and has a much larger code and
2793 Previous Release (VC 9.0):
2794 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
2795 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
2796 Current Release (VC 9.0):
2797 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
2798 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
2801 ----------------------------------------
2802 23 June 2011. Summary of changes for version 20110623:
2804 1) ACPI CA Core Subsystem:
2806 Updated the predefined name repair mechanism to not attempt repair of a
2808 return object if a _PSS object is present. We can only sort the _TSS
2810 package if there is no _PSS within the same scope. This is because if
2813 present, the ACPI specification dictates that the _TSS Power Dissipation
2815 is to be ignored, and therefore some BIOSs leave garbage values in the
2817 Power field(s). In this case, it is best to just return the _TSS package
2819 is. Reported by, and fixed with assistance from Fenghua Yu.
2821 Added an option to globally disable the control method return value
2823 and repair. This runtime option can be used to disable return value
2826 this is causing a problem on a particular machine. Also added an option
2828 AcpiExec (-dr) to set this disable flag.
2830 All makefiles and project files: Major changes to improve generation of
2832 tools. ACPICA BZ 912:
2833 Reduce default optimization levels to improve compatibility
2834 For Linux, add strict-aliasing=0 for gcc 4
2835 Cleanup and simplify use of command line defines
2836 Cleanup multithread library support
2837 Improve usage messages
2839 Linux-specific header: update handling of THREAD_ID and pthread. For the
2841 bit case, improve casting to eliminate possible warnings, especially with
2845 Example Code and Data Size: These are the sizes for the OS-independent
2846 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2848 version of the code includes the debug output trace mechanism and has a
2850 larger code and data size.
2852 Previous Release (VC 9.0):
2853 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
2854 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
2855 Current Release (VC 9.0):
2856 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
2857 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
2859 2) iASL Compiler/Disassembler and Tools:
2861 With this release, a new utility named "acpihelp" has been added to the
2863 package. This utility summarizes the ACPI specification chapters for the
2865 and AML languages. It generates under Linux/Unix as well as Windows, and
2866 provides the following functionality:
2867 Find/display ASL operator(s) -- with description and syntax.
2868 Find/display ASL keyword(s) -- with exact spelling and descriptions.
2869 Find/display ACPI predefined name(s) -- with description, number
2870 of arguments, and the return value data type.
2871 Find/display AML opcode name(s) -- with opcode, arguments, and
2873 Decode/display AML opcode -- with opcode name, arguments, and
2876 Service Layers: Make multi-thread support configurable. Conditionally
2878 the multi-thread support so that threading libraries will not be linked
2881 necessary. The only tool that requires multi-thread support is AcpiExec.
2883 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
2885 Bison appear to want the interface to yyerror to be a const char * (or at
2886 least this is a problem when generating iASL on some systems.) ACPICA BZ
2890 Tools: Fix for systems where O_BINARY is not defined. Only used for
2892 versions of the tools.
2894 ----------------------------------------
2895 27 May 2011. Summary of changes for version 20110527:
2897 1) ACPI CA Core Subsystem:
2899 ASL Load() operator: Reinstate most restrictions on the incoming ACPI
2901 signature. Now, only allow SSDT, OEMx, and a null signature. History:
2902 1) Originally, we checked the table signature for "SSDT" or "PSDT".
2903 (PSDT is now obsolete.)
2904 2) We added support for OEMx tables, signature "OEM" plus a fourth
2905 "don't care" character.
2906 3) Valid tables were encountered with a null signature, so we just
2907 gave up on validating the signature, (05/2008).
2908 4) We encountered non-AML tables such as the MADT, which caused
2909 interpreter errors and kernel faults. So now, we once again allow
2910 only SSDT, OEMx, and now, also a null signature. (05/2011).
2912 Added the missing _TDL predefined name to the global name list in order
2914 enable validation. Affects both the core ACPICA code and the iASL
2917 Example Code and Data Size: These are the sizes for the OS-independent
2918 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2920 version of the code includes the debug output trace mechanism and has a
2922 larger code and data size.
2924 Previous Release (VC 9.0):
2925 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
2926 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
2927 Current Release (VC 9.0):
2928 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
2929 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
2931 2) iASL Compiler/Disassembler and Tools:
2933 Debugger/AcpiExec: Implemented support for "complex" method arguments on
2935 debugger command line. This adds support beyond simple integers --
2937 Strings, Buffers, and Packages. Includes support for nested packages.
2938 Increased the default command line buffer size to accommodate these
2940 See the ACPICA reference for details and syntax. ACPICA BZ 917.
2942 Debugger/AcpiExec: Implemented support for "default" method arguments for
2944 Execute/Debug command. Now, the debugger will always invoke a control
2946 with the required number of arguments -- even if the command line
2948 none or insufficient arguments. It uses default integer values for any
2950 arguments. Also fixes a bug where only six method arguments maximum were
2951 supported instead of the required seven.
2953 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
2955 also return status in order to prevent buffer overruns. See the ACPICA
2956 reference for details and syntax. ACPICA BZ 921
2958 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
2959 makefiles to simplify support for the two different but similar parser
2960 generators, bison and yacc.
2962 Updated the generic unix makefile for gcc 4. The default gcc version is
2964 expected to be 4 or greater, since options specific to gcc 4 are used.
2966 ----------------------------------------
2967 13 April 2011. Summary of changes for version 20110413:
2969 1) ACPI CA Core Subsystem:
2971 Implemented support to execute a so-called "orphan" _REG method under the
2973 device. This change will force the execution of a _REG method underneath
2976 device even if there is no corresponding operation region of type
2977 EmbeddedControl. Fixes a problem seen on some machines and apparently is
2978 compatible with Windows behavior. ACPICA BZ 875.
2980 Added more predefined methods that are eligible for automatic NULL
2982 element removal. This change adds another group of predefined names to
2985 of names that can be repaired by having NULL package elements dynamically
2986 removed. This group are those methods that return a single variable-
2988 package containing simple data types such as integers, buffers, strings.
2990 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
2993 and _TZD. ACPICA BZ 914.
2995 Split and segregated all internal global lock functions to a new file,
2998 Updated internal address SpaceID for DataTable regions. Moved this
3001 id in preparation for ACPI 5.0 changes that will include some new space
3004 change should not affect user/host code.
3006 Example Code and Data Size: These are the sizes for the OS-independent
3008 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
3010 the code includes the debug output trace mechanism and has a much larger
3015 Previous Release (VC 9.0):
3016 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
3017 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
3018 Current Release (VC 9.0):
3019 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
3020 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
3022 2) iASL Compiler/Disassembler and Tools:
3024 iASL/DTC: Major update for new grammar features. Allow generic data types
3026 custom ACPI tables. Field names are now optional. Any line can be split
3028 multiple lines using the continuation char (\). Large buffers now use
3030 continuation character(s) and no colon on the continuation lines. See the
3032 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
3035 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
3037 Since the parser stuffs a "zero" as the return value for these statements
3040 the underlying AML grammar), they were seen as "return with value" by the
3042 semantic checking. They are now seen correctly as "null" return
3045 iASL: Check if a_REG declaration has a corresponding Operation Region.
3047 check for each _REG to ensure that there is in fact a corresponding
3049 region declaration in the same scope. If not, the _REG method is not very
3051 since it probably won't be executed. ACPICA BZ 915.
3053 iASL/DTC: Finish support for expression evaluation. Added a new
3056 that implements c-style operator precedence and parenthesization. ACPICA
3060 Disassembler/DTC: Remove support for () and <> style comments in data
3063 that DTC has full expression support, we don't want to have comment
3066 start with a parentheses or a less-than symbol. Now, only the standard /*
3069 comments are supported, as well as the bracket [] comments.
3071 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
3073 headers in the acpidump file. Update the header validation to support
3075 tables. Problem introduced in previous AcpiXtract version in the change
3077 support "wrong checksum" error messages emitted by acpidump utility.
3079 iASL: Add a * option to generate all template files (as a synonym for
3083 "iasl -T *" or "iasl -T ALL".
3085 iASL/DTC: Do not abort compiler on fatal errors. We do not want to
3087 abort the compiler on "fatal" errors, simply should abort the current
3089 This allows multiple compiles with a single (possibly wildcard) compiler
3092 ----------------------------------------
3093 16 March 2011. Summary of changes for version 20110316:
3095 1) ACPI CA Core Subsystem:
3097 Fixed a problem caused by a _PRW method appearing at the namespace root
3099 during the setup of wake GPEs. A fault could occur if a _PRW directly
3102 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
3104 Implemented support for "spurious" Global Lock interrupts. On some
3106 global lock interrupt can occur without the pending flag being set. Upon
3109 interrupt, we now ensure that a thread is actually waiting for the lock
3111 signaling GL availability. Rafael Wysocki, Bob Moore.
3113 Example Code and Data Size: These are the sizes for the OS-independent
3115 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
3117 the code includes the debug output trace mechanism and has a much larger
3122 Previous Release (VC 9.0):
3123 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
3124 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
3125 Current Release (VC 9.0):
3126 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
3127 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
3129 2) iASL Compiler/Disassembler and Tools:
3131 Implemented full support for the "SLIC" ACPI table. Includes support in
3133 header files, disassembler, table compiler, and template generator. Bob
3137 AcpiXtract: Correctly handle embedded comments and messages from
3139 Apparently some or all versions of acpidump will occasionally emit a
3142 "Wrong checksum", etc., into the dump file. This was causing problems for
3143 AcpiXtract. ACPICA BZ 905.
3145 iASL: Fix the Linux makefile by removing an inadvertent double file
3149 AcpiExec: Update installation of operation region handlers. Install one
3151 for a user-defined address space. This is used by the ASL test suite
3154 ----------------------------------------
3155 11 February 2011. Summary of changes for version 20110211:
3157 1) ACPI CA Core Subsystem:
3159 Added a mechanism to defer _REG methods for some early-installed
3161 Most user handlers should be installed before call to
3162 AcpiEnableSubsystem.
3163 However, Event handlers and region handlers should be installed after
3164 AcpiInitializeObjects. Override handlers for the "default" regions should
3166 installed early, however. This change executes all _REG methods for the
3167 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
3168 chicken/egg issues between them. ACPICA BZ 848.
3170 Implemented an optimization for GPE detection. This optimization will
3172 ignore GPE registers that contain no enabled GPEs -- there is no need to
3173 read the register since this information is available internally. This
3174 becomes more important on machines with a large GPE space. ACPICA
3176 884. Lin Ming. Suggestion from Joe Liu.
3178 Removed all use of the highly unreliable FADT revision field. The
3180 number in the FADT has been found to be completely unreliable and cannot
3182 trusted. Only the actual table length can be used to infer the version.
3184 change updates the ACPICA core and the disassembler so that both no
3186 even look at the FADT version and instead depend solely upon the FADT
3189 Fix an unresolved name issue for the no-debug and no-error-message source
3190 generation cases. The _AcpiModuleName was left undefined in these cases,
3192 it is actually needed as a parameter to some interfaces. Define
3193 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
3195 Split several large files (makefiles and project files updated)
3196 utglobal.c -> utdecode.c
3197 dbcomds.c -> dbmethod.c dbnames.c
3198 dsopcode.c -> dsargs.c dscontrol.c
3199 dsload.c -> dsload2.c
3200 aslanalyze.c -> aslbtypes.c aslwalks.c
3202 Example Code and Data Size: These are the sizes for the OS-independent
3203 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3204 debug version of the code includes the debug output trace mechanism and
3206 a much larger code and data size.
3208 Previous Release (VC 9.0):
3209 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
3210 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
3211 Current Release (VC 9.0):
3212 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
3213 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
3215 2) iASL Compiler/Disassembler and Tools:
3217 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
3218 These are useful C-style macros with the standard definitions. ACPICA
3221 iASL/DTC: Added support for integer expressions and labels. Support for
3223 expressions for all integer fields in all ACPI tables. Support for labels
3225 "generic" portions of tables such as UEFI. See the iASL reference manual.
3227 Debugger: Added a command to display the status of global handlers. The
3228 "handlers" command will display op region, fixed event, and miscellaneous
3229 global handlers. installation status -- and for op regions, whether
3231 or user-installed handler will be used.
3233 iASL: Warn if reserved method incorrectly returns a value. Many
3235 names are defined such that they do not return a value. If implemented as
3237 method, issue a warning if such a name explicitly returns a value. ACPICA
3240 iASL: Added detection of GPE method name conflicts. Detects a conflict
3242 there are two GPE methods of the form _Lxy and _Exy in the same scope.
3244 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
3246 iASL/DTC: Fixed a couple input scanner issues with comments and line
3247 numbers. Comment remover could get confused and miss a comment ending.
3249 a problem with line counter maintenance.
3251 iASL/DTC: Reduced the severity of some errors from fatal to error. There
3253 no need to abort on simple errors within a field definition.
3255 Debugger: Simplified the output of the help command. All help output now
3257 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
3259 ----------------------------------------
3260 12 January 2011. Summary of changes for version 20110112:
3262 1) ACPI CA Core Subsystem:
3264 Fixed a race condition between method execution and namespace walks that
3266 possibly cause a fault. The problem was apparently introduced in version
3267 20100528 as a result of a performance optimization that reduces the
3270 namespace walks upon method exit by using the delete_namespace_subtree
3271 function instead of the delete_namespace_by_owner function used
3273 Bug is a missing namespace lock in the delete_namespace_subtree function.
3274 dana.myers@oracle.com
3276 Fixed several issues and a possible fault with the automatic "serialized"
3277 method support. History: This support changes a method to "serialized" on
3279 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
3280 possibility that it cannot handle reentrancy. This fix repairs a couple
3282 issues seen in the field, especially on machines with many cores:
3284 1) Delete method children only upon the exit of the last thread,
3285 so as to not delete objects out from under other running threads
3286 (and possibly causing a fault.)
3287 2) Set the "serialized" bit for the method only upon the exit of the
3288 Last thread, so as to not cause deadlock when running threads
3290 3) Cleanup the use of the AML "MethodFlags" and internal method flags
3291 so that there is no longer any confusion between the two.
3293 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
3295 Debugger: Now lock the namespace for duration of a namespace dump.
3297 issues if the namespace is changing dynamically underneath the debugger.
3298 Especially affects temporary namespace nodes, since the debugger displays
3301 Updated the ordering of include files. The ACPICA headers should appear
3302 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
3304 any necessary compiler-specific defines, etc. Affects the ACPI-related
3308 Updated all ACPICA copyrights and signons to 2011. Added the 2011
3310 to all module headers and signons, including the Linux header. This
3312 virtually every file in the ACPICA core subsystem, iASL compiler, and all
3315 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
3316 project files for VC++ 6.0 are now obsolete. New project files can be
3318 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
3321 Example Code and Data Size: These are the sizes for the OS-independent
3322 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3323 debug version of the code includes the debug output trace mechanism and
3325 much larger code and data size.
3327 Previous Release (VC 6.0):
3328 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
3329 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
3330 Current Release (VC 9.0):
3331 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
3332 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
3334 2) iASL Compiler/Disassembler and Tools:
3336 iASL: Added generic data types to the Data Table compiler. Add "generic"
3338 types such as UINT32, String, Unicode, etc., to simplify the generation
3340 platform-defined tables such as UEFI. Lin Ming.
3342 iASL: Added listing support for the Data Table Compiler. Adds listing
3344 (-l) to display actual binary output for each line of input code.
3346 ----------------------------------------
3347 09 December 2010. Summary of changes for version 20101209:
3349 1) ACPI CA Core Subsystem:
3351 Completed the major overhaul of the GPE support code that was begun in
3353 2010. Major features include: removal of _PRW execution in ACPICA (host
3354 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
3355 changes to existing interfaces, simplification of GPE handler operation,
3357 a handful of new interfaces:
3363 One new file, evxfgpe.c to consolidate all external GPE interfaces.
3365 See the ACPICA Programmer Reference for full details and programming
3366 information. See the new section 4.4 "General Purpose Event (GPE)
3368 for a full overview, and section 8.7 "ACPI General Purpose Event
3370 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
3372 Bob Moore, Rafael Wysocki.
3374 Implemented a new GPE feature for Windows compatibility, the "Implicit
3376 GPE Notify". This feature will automatically issue a Notify(2) on a
3378 when a Wake GPE is received if there is no corresponding GPE method or
3379 handler. ACPICA BZ 870.
3381 Fixed a problem with the Scope() operator during table parse and load
3383 During load phase (table load or method execution), the scope operator
3385 not enter the target into the namespace. Instead, it should open a new
3387 at the target location. Linux BZ 19462, ACPICA BZ 882.
3389 Example Code and Data Size: These are the sizes for the OS-independent
3390 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3391 debug version of the code includes the debug output trace mechanism and
3393 much larger code and data size.
3396 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
3397 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
3399 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
3400 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
3402 2) iASL Compiler/Disassembler and Tools:
3404 iASL: Relax the alphanumeric restriction on _CID strings. These strings
3406 "bus-specific" per the ACPI specification, and therefore any characters
3408 acceptable. The only checks that can be performed are for a null string
3410 perhaps for a leading asterisk. ACPICA BZ 886.
3412 iASL: Fixed a problem where a syntax error that caused a premature EOF
3413 condition on the source file emitted a very confusing error message. The
3414 premature EOF is now detected correctly. ACPICA BZ 891.
3416 Disassembler: Decode the AccessSize within a Generic Address Structure
3418 access, word access, etc.) Note, this field does not allow arbitrary bit
3419 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
3421 New: AcpiNames utility - Example namespace dump utility. Shows an example
3423 ACPICA configuration for a minimal namespace dump utility. Uses table and
3424 namespace managers, but no AML interpreter. Does not add any
3426 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
3427 partition and configure ACPICA. ACPICA BZ 883.
3429 AML Debugger: Increased the debugger buffer size for method return
3431 Was 4K, increased to 16K. Also enhanced error messages for debugger
3433 execution, including the buffer overflow case.
3435 ----------------------------------------
3436 13 October 2010. Summary of changes for version 20101013:
3438 1) ACPI CA Core Subsystem:
3440 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
3442 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
3443 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
3445 Changed the type of the predefined namespace object _TZ from ThermalZone
3447 Device. This was found to be confusing to the host software that
3449 the various thermal zones, since _TZ is not really a ThermalZone.
3452 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
3455 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
3456 string is "Windows 2006 SP2".
3458 Eliminated duplicate code in AcpiUtExecute* functions. Now that the
3460 code automatically repairs _HID-related strings, this type of code is no
3461 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
3464 Example Code and Data Size: These are the sizes for the OS-independent
3465 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3466 debug version of the code includes the debug output trace mechanism and
3468 much larger code and data size.
3471 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
3472 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
3474 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
3475 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
3477 2) iASL Compiler/Disassembler and Tools:
3479 iASL: Implemented additional compile-time validation for _HID strings.
3481 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
3484 the string must be exactly seven or eight characters. For both _HID and
3486 strings, all characters must be alphanumeric. ACPICA BZ 874.
3488 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
3489 descriptors that are mostly or all zeros, with the expectation that they
3491 be filled in at runtime. iASL now allows this as long as there is a
3493 tag" (name) associated with the descriptor, which gives the ASL a handle
3494 needed to modify the descriptor. ACPICA BZ 873.
3496 Added single-thread support to the generic Unix application OSL.
3498 for iASL support, this change removes the use of semaphores in the
3500 threaded ACPICA tools/applications - increasing performance. The
3501 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
3502 option. ACPICA BZ 879.
3504 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
3506 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
3508 iASL: Moved all compiler messages to a new file, aslmessages.h.
3510 ----------------------------------------
3511 15 September 2010. Summary of changes for version 20100915:
3513 1) ACPI CA Core Subsystem:
3515 Removed the AcpiOsDerivePciId OSL interface. The various host
3517 of this function were not OS-dependent and are now obsolete and can be
3518 removed from all host OSLs. This function has been replaced by
3519 AcpiHwDerivePciId, which is now part of the ACPICA core code.
3520 AcpiHwDerivePciId has been implemented without recursion. Adds one new
3521 module, hwpci.c. ACPICA BZ 857.
3523 Implemented a dynamic repair for _HID and _CID strings. The following
3524 problems are now repaired at runtime: 1) Remove a leading asterisk in the
3525 string, and 2) the entire string is uppercased. Both repairs are in
3526 accordance with the ACPI specification and will simplify host driver
3530 The ACPI_THREAD_ID type is no longer configurable, internally it is now
3531 always UINT64. This simplifies the ACPICA code, especially any printf
3533 UINT64 is the only common data type for all thread_id types across all
3534 operating systems. It is now up to the host OSL to cast the native
3536 type to UINT64 before returning the value to ACPICA (via
3538 Lin Ming, Bob Moore.
3540 Added the ACPI_INLINE type to enhance the ACPICA configuration. The
3542 keyword is not standard across compilers, and this type allows inline to
3544 configured on a per-compiler basis. Lin Ming.
3546 Made the system global AcpiGbl_SystemAwakeAndRunning publically
3548 Added an extern for this boolean in acpixf.h. Some hosts utilize this
3550 during suspend/restore operations. ACPICA BZ 869.
3552 All code that implements error/warning messages with the "ACPI:" prefix
3554 been moved to a new module, utxferror.c.
3556 The UINT64_OVERLAY was moved to utmath.c, which is the only module where
3558 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
3560 Example Code and Data Size: These are the sizes for the OS-independent
3561 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3562 debug version of the code includes the debug output trace mechanism and
3564 much larger code and data size.
3567 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
3568 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
3570 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
3571 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
3573 2) iASL Compiler/Disassembler and Tools:
3575 iASL/Disassembler: Write ACPI errors to stderr instead of the output
3577 This keeps the output files free of random error messages that may
3579 from within the namespace/interpreter code. Used this opportunity to
3581 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
3582 866. Lin Ming, Bob Moore.
3584 Tools: update some printfs for ansi warnings on size_t. Handle width
3586 of size_t on 32-bit versus 64-bit generations. Lin Ming.
3588 ----------------------------------------
3589 06 August 2010. Summary of changes for version 20100806:
3591 1) ACPI CA Core Subsystem:
3593 Designed and implemented a new host interface to the _OSI support code.
3595 will allow the host to dynamically add or remove multiple _OSI strings,
3597 well as install an optional handler that is called for each _OSI
3599 Also added a new AML debugger command, 'osi' to display and modify the
3601 _OSI string table, and test support in the AcpiExec utility. See the
3603 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
3605 AcpiInstallInterface - Add an _OSI string.
3606 AcpiRemoveInterface - Delete an _OSI string.
3607 AcpiInstallInterfaceHandler - Install optional _OSI handler.
3609 AcpiOsValidateInterface - no longer used.
3611 source/components/utilities/utosi.c
3613 Re-introduced the support to enable multi-byte transfers for Embedded
3614 Controller (EC) operation regions. A reported problem was found to be a
3616 in the host OS, not in the multi-byte support. Previously, the maximum
3618 size passed to the EC operation region handler was a single byte. There
3620 often EC Fields larger than one byte that need to be transferred, and it
3622 useful for the EC driver to lock these as a single transaction. This
3624 enables single transfers larger than 8 bits. This effectively changes the
3625 access to the EC space from ByteAcc to AnyAcc, and will probably require
3626 changes to the host OS Embedded Controller driver to enable 16/32/64/256-
3628 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
3630 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
3631 prototype in acpiosxf.h had the output value pointer as a (void *).
3632 It should be a (UINT64 *). This may affect some host OSL code.
3634 Fixed a couple problems with the recently modified Linux makefiles for
3636 and AcpiExec. These new makefiles place the generated object files in the
3637 local directory so that there can be no collisions between the files that
3639 shared between them that are compiled with different options.
3641 Example Code and Data Size: These are the sizes for the OS-independent
3642 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3643 debug version of the code includes the debug output trace mechanism and
3645 much larger code and data size.
3648 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
3649 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
3651 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
3652 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
3654 2) iASL Compiler/Disassembler and Tools:
3656 iASL/Disassembler: Added a new option (-da, "disassemble all") to load
3658 namespace from and disassemble an entire group of AML files. Useful for
3659 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
3661 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
3663 iASL: Allow multiple invocations of -e option. This change allows
3665 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
3669 ----------------------------------------
3670 02 July 2010. Summary of changes for version 20100702:
3672 1) ACPI CA Core Subsystem:
3674 Implemented several updates to the recently added GPE reference count
3675 support. The model for "wake" GPEs is changing to give the host OS
3677 control of these GPEs. Eventually, the ACPICA core will not execute any
3679 methods, since the host already must execute them. Also, additional
3681 were made to help ensure that the reference counts are kept in proper
3682 synchronization with reality. Rafael J. Wysocki.
3684 1) Ensure that GPEs are not enabled twice during initialization.
3685 2) Ensure that GPE enable masks stay in sync with the reference count.
3686 3) Do not inadvertently enable GPEs when writing GPE registers.
3687 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
3688 interface. This interface will set or clear individual GPEs for wakeup.
3689 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These
3691 are now used for "runtime" GPEs only.
3693 Changed the behavior of the GPE install/remove handler interfaces. The
3696 no longer disabled during this process, as it was found to cause problems
3698 some machines. Rafael J. Wysocki.
3700 Reverted a change introduced in version 20100528 to enable Embedded
3701 Controller multi-byte transfers. This change was found to cause problems
3703 Index Fields and possibly Bank Fields. It will be reintroduced when these
3704 problems have been resolved.
3706 Fixed a problem with references to Alias objects within Package Objects.
3708 reference to an Alias within the definition of a Package was not always
3709 resolved properly. Aliases to objects like Processors, Thermal zones,
3711 were resolved to the actual object instead of a reference to the object
3714 should be. Package objects are only allowed to contain integer, string,
3715 buffer, package, and reference objects. Redhat bugzilla 608648.
3717 Example Code and Data Size: These are the sizes for the OS-independent
3718 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3719 debug version of the code includes the debug output trace mechanism and
3721 much larger code and data size.
3724 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
3725 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
3727 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
3728 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
3730 2) iASL Compiler/Disassembler and Tools:
3732 iASL: Implemented a new compiler subsystem to allow definition and
3733 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
3735 are called "ACPI Data Tables", and the new compiler is the "Data Table
3736 Compiler". This compiler is intended to simplify the existing error-prone
3737 process of creating these tables for the BIOS, as well as allowing the
3738 disassembly, modification, recompilation, and override of existing ACPI
3740 tables. See the iASL User Guide for detailed information.
3742 iASL: Implemented a new Template Generator option in support of the new
3744 Table Compiler. This option will create examples of all known ACPI tables
3745 that can be used as the basis for table development. See the iASL
3746 documentation and the -T option.
3748 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
3751 Updated the Linux makefiles for iASL and AcpiExec to place the generated
3752 object files in the local directory so that there can be no collisions
3753 between the shared files between them that are generated with different
3756 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
3758 the #define __APPLE__ to enable this support.
3760 ----------------------------------------
3761 28 May 2010. Summary of changes for version 20100528:
3763 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
3764 available at www.acpi.info. This is primarily an errata release.
3766 1) ACPI CA Core Subsystem:
3768 Undefined ACPI tables: We are looking for the definitions for the
3770 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
3772 Implemented support to enable multi-byte transfers for Embedded
3774 (EC) operation regions. Previously, the maximum data size passed to the
3776 operation region handler was a single byte. There are often EC Fields
3778 than one byte that need to be transferred, and it is useful for the EC
3780 to lock these as a single transaction. This change enables single
3782 larger than 8 bits. This effectively changes the access to the EC space
3784 ByteAcc to AnyAcc, and will probably require changes to the host OS
3786 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
3788 transfers. Alexey Starikovskiy, Lin Ming
3790 Implemented a performance enhancement for namespace search and access.
3792 change enhances the performance of namespace searches and walks by adding
3794 backpointer to the parent in each namespace node. On large namespaces,
3796 change can improve overall ACPI performance by up to 9X. Adding a pointer
3798 each namespace node increases the overall size of the internal namespace
3800 about 5%, since each namespace entry usually consists of both a namespace
3801 node and an ACPI operand object. However, this is the first growth of the
3802 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
3804 Implemented a performance optimization that reduces the number of
3806 walks. On control method exit, only walk the namespace if the method is
3808 to have created namespace objects outside of its local scope. Previously,
3810 entire namespace was traversed on each control method exit. This change
3812 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
3815 Added support to truncate I/O addresses to 16 bits for Windows
3817 Some ASL code has been seen in the field that inadvertently has bits set
3818 above bit 15. This feature is optional and is enabled if the BIOS
3820 any Windows OSI strings. It can also be enabled by the host OS. Matthew
3823 Added support to limit the maximum time for the ASL Sleep() operator. To
3824 prevent accidental deep sleeps, limit the maximum time that Sleep() will
3825 actually sleep. Configurable, the default maximum is two seconds. ACPICA
3828 Added run-time validation support for the _WDG and_WED Microsoft
3830 methods. These objects are defined by "Windows Instrumentation", and are
3832 part of the ACPI spec. ACPICA BZ 860.
3834 Expanded all statistic counters used during namespace and device
3835 initialization from 16 to 32 bits in order to support very large
3838 Replaced all instances of %d in printf format specifiers with %u since
3840 all integers in ACPICA are unsigned.
3842 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
3846 Example Code and Data Size: These are the sizes for the OS-independent
3847 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3848 debug version of the code includes the debug output trace mechanism and
3850 much larger code and data size.
3853 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
3854 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
3856 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
3857 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
3859 2) iASL Compiler/Disassembler and Tools:
3861 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
3862 methods. These objects are defined by "Windows Instrumentation", and are
3864 part of the ACPI spec. ACPICA BZ 860.
3866 AcpiExec: added option to disable the memory tracking mechanism. The -dt
3867 option will disable the tracking mechanism, which improves performance
3870 AcpiExec: Restructured the command line options into -d (disable) and -e
3873 ----------------------------------------
3874 28 April 2010. Summary of changes for version 20100428:
3876 1) ACPI CA Core Subsystem:
3878 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
3879 including FADT-based and GPE Block Devices, execute any _PRW methods in
3881 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
3882 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
3883 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
3884 Devices. Provides compatibility with other ACPI implementations. Two new
3885 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
3888 Fixed a regression introduced in version 20100331 within the table
3890 where initial table loading could fail. This was introduced in the fix
3892 AcpiReallocateRootTable. Also, renamed some of fields in the table
3894 data structures to clarify their meaning and use.
3896 Fixed a possible allocation overrun during internal object copy in
3897 AcpiUtCopySimpleObject. The original code did not correctly handle the
3899 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
3902 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
3903 possible access beyond end-of-allocation. Also, now fully validate
3905 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
3907 Example Code and Data Size: These are the sizes for the OS-independent
3908 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3909 debug version of the code includes the debug output trace mechanism and
3911 much larger code and data size.
3914 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
3915 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
3917 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
3918 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
3920 2) iASL Compiler/Disassembler and Tools:
3922 iASL: Implemented Min/Max/Len/Gran validation for address resource
3923 descriptors. This change implements validation for the address fields
3925 are common to all address-type resource descriptors. These checks are
3926 implemented: Checks for valid Min/Max, length within the Min/Max window,
3927 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
3929 table 6-40 in the ACPI 4.0a specification. Also split the large
3931 and aslrestype2.c files into five new files. ACPICA BZ 840.
3933 iASL: Added support for the _Wxx predefined names. This support was
3935 and these names were not recognized by the compiler as valid predefined
3936 names. ACPICA BZ 851.
3938 iASL: Added an error for all predefined names that are defined to return
3940 value and thus must be implemented as Control Methods. These include all
3942 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
3943 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
3945 iASL: Implemented the -ts option to emit hex AML data in ASL format, as
3947 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
3949 dynamically loaded via the Load() operator. Also cleaned up output for
3952 ta and -tc options. ACPICA BZ 853.
3954 Tests: Added a new file with examples of extended iASL error checking.
3955 Demonstrates the advanced error checking ability of the iASL compiler.
3956 Available at tests/misc/badcode.asl.
3958 ----------------------------------------
3959 31 March 2010. Summary of changes for version 20100331:
3961 1) ACPI CA Core Subsystem:
3963 Completed a major update for the GPE support in order to improve support
3965 shared GPEs and to simplify both host OS and ACPICA code. Added a
3967 count mechanism to support shared GPEs that require multiple device
3969 Several external interfaces have changed. One external interface has been
3970 removed. One new external interface was added. Most of the GPE external
3971 interfaces now use the GPE spinlock instead of the events mutex (and the
3972 Flags parameter for many GPE interfaces has been removed.) See the
3974 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
3976 Wysocki. ACPICA BZ 831.
3979 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
3985 Implemented write support for DataTable operation regions. These regions
3987 defined via the DataTableRegion() operator. Previously, only read support
3989 implemented. The ACPI specification allows DataTableRegions to be
3993 Implemented a new subsystem option to force a copy of the DSDT to local
3994 memory. Optionally copy the entire DSDT to local memory (instead of
3996 mapping it.) There are some (albeit very rare) BIOSs that corrupt or
3998 the original DSDT, creating the need for this option. Default is FALSE,
4002 Implemented detection of a corrupted or replaced DSDT. This change adds
4003 support to detect a DSDT that has been corrupted and/or replaced from
4005 the OS (by firmware). This is typically catastrophic for the system, but
4007 been seen on some machines. Once this problem has been detected, the DSDT
4008 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
4010 Fixed two problems with AcpiReallocateRootTable during the root table
4012 When copying the root table to the new allocation, the length used was
4013 incorrect. The new size was used instead of the current table size,
4015 too much data was copied. Also, the count of available slots for ACPI
4017 was not set correctly. Alexey Starikovskiy, Bob Moore.
4019 Example Code and Data Size: These are the sizes for the OS-independent
4020 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4021 debug version of the code includes the debug output trace mechanism and
4023 much larger code and data size.
4026 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
4027 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
4029 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
4030 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
4032 2) iASL Compiler/Disassembler and Tools:
4034 iASL: Implement limited typechecking for values returned from predefined
4035 control methods. The type of any returned static (unnamed) object is now
4036 validated. For example, Return(1). ACPICA BZ 786.
4038 iASL: Fixed a predefined name object verification regression. Fixes a
4040 introduced in version 20100304. An error is incorrectly generated if a
4041 predefined name is declared as a static named object with a value defined
4042 using the keywords "Zero", "One", or "Ones". Lin Ming.
4044 iASL: Added Windows 7 support for the -g option (get local ACPI tables)
4046 reducing the requested registry access rights. ACPICA BZ 842.
4048 Disassembler: fixed a possible fault when generating External()
4050 Introduced in commit ae7d6fd: Properly handle externals with parent-
4052 (carat). Fixes a string length allocation calculation. Lin Ming.
4054 ----------------------------------------
4055 04 March 2010. Summary of changes for version 20100304:
4057 1) ACPI CA Core Subsystem:
4059 Fixed a possible problem with the AML Mutex handling function
4060 AcpiExReleaseMutex where the function could fault under the very rare
4061 condition when the interpreter has blocked, the interpreter lock is
4063 the interpreter is then reentered via the same thread, and attempts to
4064 acquire an AML mutex that was previously acquired. FreeBSD report 140979.
4068 Implemented additional configuration support for the AML "Debug Object".
4069 Output from the debug object can now be enabled via a global variable,
4070 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
4072 This debug output is now available in the release version of ACPICA
4074 of just the debug version. Also, the entire debug output module can now
4076 configured out of the ACPICA build if desired. One new file added,
4077 executer/exdebug.c. Lin Ming, Bob Moore.
4079 Added header support for the ACPI MCHI table (Management Controller Host
4080 Interface Table). This table was added in ACPI 4.0, but the defining
4082 has only recently become available.
4084 Standardized output of integer values for ACPICA warnings/errors. Always
4086 0x prefix for hex output, always use %u for unsigned integer decimal
4088 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
4090 invocations.) These invocations were converted from the original
4091 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
4093 Example Code and Data Size: These are the sizes for the OS-independent
4094 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4095 debug version of the code includes the debug output trace mechanism and
4097 much larger code and data size.
4100 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
4101 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
4103 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
4104 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
4106 2) iASL Compiler/Disassembler and Tools:
4108 iASL: Implemented typechecking support for static (non-control method)
4109 predefined named objects that are declared with the Name() operator. For
4110 example, the type of this object is now validated to be of type Integer:
4111 Name(_BBN, 1). This change migrates the compiler to using the core
4113 name table instead of maintaining a local version. Added a new file,
4114 aslpredef.c. ACPICA BZ 832.
4116 Disassembler: Added support for the ACPI 4.0 MCHI table.
4118 ----------------------------------------
4119 21 January 2010. Summary of changes for version 20100121:
4121 1) ACPI CA Core Subsystem:
4123 Added the 2010 copyright to all module headers and signons. This affects
4124 virtually every file in the ACPICA core subsystem, the iASL compiler, the
4125 tools/utilities, and the test suites.
4127 Implemented a change to the AcpiGetDevices interface to eliminate
4129 invocations of the _STA method. In the case where a specific _HID is
4130 requested, do not run _STA until a _HID match is found. This eliminates
4131 potentially dozens of _STA calls during a search for a particular
4133 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
4135 Implemented an additional repair for predefined method return values.
4137 to repair unexpected NULL elements within returned Package objects.
4140 Integer of value zero, a NULL String, or a zero-length Buffer as
4142 ACPICA BZ 818. Lin Ming, Bob Moore.
4144 Removed the obsolete ACPI_INTEGER data type. This type was introduced as
4146 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
4148 64-bit AML integers). It is now obsolete and this change removes it from
4150 ACPICA code base, replaced by UINT64. The original typedef has been
4152 for now for compatibility with existing device driver code. ACPICA BZ
4155 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
4157 the parse tree object.
4159 Added additional warning options for the gcc-4 generation. Updated the
4161 accordingly. This includes some code restructuring to eliminate
4163 code, elimination of some gotos, elimination of unused return values,
4165 additional casting, and removal of redundant declarations.
4167 Example Code and Data Size: These are the sizes for the OS-independent
4168 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4169 debug version of the code includes the debug output trace mechanism and
4171 much larger code and data size.
4174 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
4175 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
4177 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
4178 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
4180 2) iASL Compiler/Disassembler and Tools:
4182 No functional changes for this release.
4184 ----------------------------------------
4185 14 December 2009. Summary of changes for version 20091214:
4187 1) ACPI CA Core Subsystem:
4189 Enhanced automatic data type conversions for predefined name repairs.
4191 change expands the automatic repairs/conversions for predefined name
4193 values to make Integers, Strings, and Buffers fully interchangeable.
4196 Buffer can be converted to a Package of Integers if necessary. The
4198 module was completely restructured. Lin Ming, Bob Moore.
4200 Implemented automatic removal of null package elements during predefined
4202 repairs. This change will automatically remove embedded and trailing NULL
4203 package elements from returned package objects that are defined to
4206 variable number of sub-packages. The driver is then presented with a
4208 with no null elements to deal with. ACPICA BZ 819.
4210 Implemented a repair for the predefined _FDE and _GTM names. The expected
4211 return value for both names is a Buffer of 5 DWORDs. This repair fixes
4213 possible problems (both seen in the field), where a package of integers
4215 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
4218 Implemented additional module-level code support. This change will
4220 execute module-level code that is not at the root of the namespace (under
4222 Device object, etc.). Now executes the code within the current scope
4224 of the root. ACPICA BZ 762. Lin Ming.
4226 Fixed possible mutex acquisition errors when running _REG methods. Fixes
4228 problem where mutex errors can occur when running a _REG method that is
4230 the same scope as a method-defined operation region or an operation
4232 under a module-level IF block. This type of code is rare, so the problem
4234 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
4236 Fixed a possible memory leak during module-level code execution. An
4238 could be leaked for each block of executed module-level code if the
4239 interpreter slack mode is enabled This change deletes any implicitly
4241 object from the module-level code block. Lin Ming.
4243 Removed messages for successful predefined repair(s). The repair
4245 was considered too wordy. Now, messages are only unconditionally emitted
4247 the return object cannot be repaired. Existing messages for successful
4248 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
4251 Example Code and Data Size: These are the sizes for the OS-independent
4252 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4253 debug version of the code includes the debug output trace mechanism and
4255 much larger code and data size.
4258 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
4259 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
4261 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
4262 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
4264 2) iASL Compiler/Disassembler and Tools:
4266 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
4268 were no longer automatically removed at the termination of the compile.
4270 acpiexec: Implemented the -f option to specify default region fill value.
4271 This option specifies the value used to initialize buffers that simulate
4272 operation regions. Default value is zero. Useful for debugging problems
4274 depend on a specific initial value for a region or field.
4276 ----------------------------------------
4277 12 November 2009. Summary of changes for version 20091112:
4279 1) ACPI CA Core Subsystem:
4281 Implemented a post-order callback to AcpiWalkNamespace. The existing
4282 interface only has a pre-order callback. This change adds an additional
4283 parameter for a post-order callback which will be more useful for bus
4285 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
4287 Modified the behavior of the operation region memory mapping cache for
4288 SystemMemory. Ensure that the memory mappings created for operation
4290 do not cross 4K page boundaries. Crossing a page boundary while mapping
4291 regions can cause kernel warnings on some hosts if the pages have
4293 attributes. Such regions are probably BIOS bugs, and this is the
4295 Linux BZ 14445. Lin Ming.
4297 Implemented an automatic repair for predefined methods that must return
4298 sorted lists. This change will repair (by sorting) packages returned by
4300 _PSS, and _TSS. Drivers can now assume that the packages are correctly
4302 and do not contain NULL package elements. Adds one new file,
4303 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
4305 Fixed a possible fault during predefined name validation if a return
4307 object contains NULL elements. Also adds a warning if a NULL element is
4308 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
4310 include repair or removal of all such NULL elements where possible.
4312 Implemented additional module-level executable AML code support. This
4314 will execute module-level code that is not at the root of the namespace
4315 (under a Device object, etc.) at table load time. Module-level executable
4317 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
4319 Implemented a new internal function to create Integer objects. This
4321 simplifies miscellaneous object creation code. ACPICA BZ 823.
4323 Reduced the severity of predefined repair messages, Warning to Info.
4325 the object was successfully repaired, a warning is too severe. Reduced to
4327 info message for now. These messages may eventually be changed to debug-
4331 Example Code and Data Size: These are the sizes for the OS-independent
4332 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4333 debug version of the code includes the debug output trace mechanism and
4335 much larger code and data size.
4338 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
4339 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
4341 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
4342 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
4344 2) iASL Compiler/Disassembler and Tools:
4346 iASL: Implemented Switch() with While(1) so that Break works correctly.
4348 change correctly implements the Switch operator with a surrounding
4350 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
4352 iASL: Added a message if a package initializer list is shorter than
4354 length. Adds a new remark for a Package() declaration if an initializer
4356 exists, but is shorter than the declared length of the package. Although
4357 technically legal, this is probably a coding error and it is seen in the
4358 field. ACPICA BZ 815. Lin Ming, Bob Moore.
4360 iASL: Fixed a problem where the compiler could fault after the maximum
4362 of errors was reached (200).
4364 acpixtract: Fixed a possible warning for pointer cast if the compiler
4366 level set very high.
4368 ----------------------------------------
4369 13 October 2009. Summary of changes for version 20091013:
4371 1) ACPI CA Core Subsystem:
4373 Fixed a problem where an Operation Region _REG method could be executed
4375 than once. If a custom address space handler is installed by the host
4377 the "initialize operation regions" phase of the ACPICA initialization,
4379 _REG methods for that address space could be executed twice. This change
4380 fixes the problem. ACPICA BZ 427. Lin Ming.
4382 Fixed a possible memory leak for the Scope() ASL operator. When the exact
4383 invocation of "Scope(\)" is executed (change scope to root), one internal
4384 operand object was leaked. Lin Ming.
4386 Implemented a run-time repair for the _MAT predefined method. If the _MAT
4387 return value is defined as a Field object in the AML, and the field
4388 size is less than or equal to the default width of an integer (32 or
4390 can incorrectly return an Integer instead of a Buffer. ACPICA now
4391 automatically repairs this problem. ACPICA BZ 810.
4393 Implemented a run-time repair for the _BIF and _BIX predefined methods.
4395 "OEM Information" field is often incorrectly returned as an Integer with
4396 value zero if the field is not supported by the platform. This is due to
4398 ambiguity in the ACPI specification. The field should always be a string.
4399 ACPICA now automatically repairs this problem by returning a NULL string
4400 within the returned Package. ACPICA BZ 807.
4402 Example Code and Data Size: These are the sizes for the OS-independent
4403 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4404 debug version of the code includes the debug output trace mechanism and
4406 much larger code and data size.
4409 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
4410 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
4412 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
4413 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
4415 2) iASL Compiler/Disassembler and Tools:
4417 Disassembler: Fixed a problem where references to external symbols that
4418 contained one or more parent-prefixes (carats) were not handled
4420 possibly causing a fault. ACPICA BZ 806. Lin Ming.
4422 Disassembler: Restructured the code so that all functions that handle
4423 external symbols are in a single module. One new file is added,
4426 AML Debugger: Added a max count argument for the Batch command (which
4427 executes multiple predefined methods within the namespace.)
4429 iASL: Updated the compiler documentation (User Reference.) Available at
4430 http://www.acpica.org/documentation/. ACPICA BZ 750.
4432 AcpiXtract: Updated for Lint and other formatting changes. Close all open
4435 ----------------------------------------
4436 03 September 2009. Summary of changes for version 20090903:
4438 1) ACPI CA Core Subsystem:
4440 For Windows Vista compatibility, added the automatic execution of an _INI
4441 method located at the namespace root (\_INI). This method is executed at
4442 table load time. This support is in addition to the automatic execution
4444 \_SB._INI. Lin Ming.
4446 Fixed a possible memory leak in the interpreter for AML package objects
4448 the package initializer list is longer than the defined size of the
4450 This apparently can only happen if the BIOS changes the package size on
4452 fly (seen in a _PSS object), as ASL compilers do not allow this. The
4453 interpreter will truncate the package to the defined size (and issue an
4455 message), but previously could leave the extra objects undeleted if they
4457 pre-created during the argument processing (such is the case if the
4459 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
4461 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
4462 This has been reported in the field. Previously, ACPICA would zero out
4464 buffer/string. Now, the operation is treated as a noop. Provides Windows
4465 compatibility. ACPICA BZ 803. Lin Ming.
4467 Removed an extraneous error message for ASL constructs of the form
4468 Store(LocalX,LocalX) when LocalX is uninitialized. These curious
4470 are seen in many BIOSs and are once again treated as NOOPs and no error
4472 emitted when they are encountered. ACPICA BZ 785.
4474 Fixed an extraneous warning message if a _DSM reserved method returns a
4475 Package object. _DSM can return any type of object, so validation on the
4476 return type cannot be performed. ACPICA BZ 802.
4478 Example Code and Data Size: These are the sizes for the OS-independent
4479 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4480 debug version of the code includes the debug output trace mechanism and
4482 much larger code and data size.
4485 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
4486 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
4488 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
4489 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
4491 2) iASL Compiler/Disassembler and Tools:
4493 iASL: Fixed a problem with the use of the Alias operator and Resource
4494 Templates. The correct alias is now constructed and no error is emitted.
4497 iASL: Implemented the -I option to specify additional search directories
4499 include files. Allows multiple additional search paths for include files.
4500 Directories are searched in the order specified on the command line
4502 the local directory is searched.) ACPICA BZ 800.
4504 iASL: Fixed a problem where the full pathname for include files was not
4505 emitted for warnings/errors. This caused the IDE support to not work
4506 properly. ACPICA BZ 765.
4508 iASL: Implemented the -@ option to specify a Windows-style response file
4509 containing additional command line options. ACPICA BZ 801.
4511 AcpiExec: Added support to load multiple AML files simultaneously (such
4514 DSDT and multiple SSDTs). Also added support for wildcards within the AML
4515 pathname. These features allow all machine tables to be easily loaded and
4516 debugged together. ACPICA BZ 804.
4518 Disassembler: Added missing support for disassembly of HEST table Error
4522 ----------------------------------------
4523 30 July 2009. Summary of changes for version 20090730:
4525 The ACPI 4.0 implementation for ACPICA is complete with this release.
4527 1) ACPI CA Core Subsystem:
4529 ACPI 4.0: Added header file support for all new and changed ACPI tables.
4530 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
4532 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
4534 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
4536 have been some ACPI 4.0 changes to other existing tables. Split the large
4537 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
4539 ACPI 4.0: Implemented predefined name validation for all new names. There
4541 31 new names in ACPI 4.0. The predefined validation module was split into
4543 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
4545 Implemented support for so-called "module-level executable code". This is
4546 executable AML code that exists outside of any control method and is
4548 to be executed at table load time. Although illegal since ACPI 2.0, this
4550 of code still exists and is apparently still being created. Blocks of
4552 code are now detected and executed as intended. Currently, the code
4554 must exist under either an If, Else, or While construct; these are the
4555 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
4557 Implemented an automatic dynamic repair for predefined names that return
4558 nested Package objects. This applies to predefined names that are defined
4560 return a variable-length Package of sub-packages. If the number of sub-
4561 packages is one, BIOS code is occasionally seen that creates a simple
4563 package with no sub-packages. This code attempts to fix the problem by
4564 wrapping a new package object around the existing package. These methods
4566 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
4570 Fixed a regression introduced in 20090625 for the AcpiGetDevices
4572 The _HID/_CID matching was broken and no longer matched IDs correctly.
4576 Fixed a problem with AcpiReset where the reset would silently fail if the
4577 register was one of the protected I/O ports. AcpiReset now bypasses the
4579 validation mechanism. This may eventually be driven into the
4583 Fixed a regression related to the recent update of the AcpiRead/Write
4584 interfaces. A sleep/suspend could fail if the optional PM2 Control
4586 does not exist during an attempt to write the Bus Master Arbitration bit.
4587 (However, some hosts already delete the code that writes this bit, and
4589 code may in fact be obsolete at this date.) ACPICA BZ 799.
4591 Fixed a problem where AcpiTerminate could fault if inadvertently called
4593 in succession. ACPICA BZ 795.
4595 Example Code and Data Size: These are the sizes for the OS-independent
4596 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4597 debug version of the code includes the debug output trace mechanism and
4599 much larger code and data size.
4602 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
4603 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
4605 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
4606 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
4608 2) iASL Compiler/Disassembler and Tools:
4610 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
4611 changes to existing tables. ACPICA BZ 775.
4613 ----------------------------------------
4614 25 June 2009. Summary of changes for version 20090625:
4616 The ACPI 4.0 Specification was released on June 16 and is available at
4617 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
4618 continue for the next few releases.
4620 1) ACPI CA Core Subsystem:
4622 ACPI 4.0: Implemented interpreter support for the IPMI operation region
4623 address space. Includes support for bi-directional data buffers and an
4625 address space handler (to be installed by an IPMI device driver.) ACPICA
4629 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
4631 support in both the header files and the disassembler.
4633 Completed a major update for the AcpiGetObjectInfo external interface.
4635 - Support for variable, unlimited length HID, UID, and CID strings.
4636 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
4638 - Call the _SxW power methods on behalf of a device object.
4639 - Determine if a device is a PCI root bridge.
4640 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
4641 These changes will require an update to all callers of this interface.
4643 the updated ACPICA Programmer Reference for details. One new source file
4645 been added - utilities/utids.c. ACPICA BZ 368, 780.
4647 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
4648 transfers. The Value parameter has been extended from 32 bits to 64 bits
4650 order to support new ACPI 4.0 tables. These changes will require an
4653 all callers of these interfaces. See the ACPICA Programmer Reference for
4654 details. ACPICA BZ 768.
4656 Fixed several problems with AcpiAttachData. The handler was not invoked
4658 the host node was deleted. The data sub-object was not automatically
4660 when the host node was deleted. The interface to the handler had an
4662 parameter, this was removed. ACPICA BZ 778.
4664 Enhanced the function that dumps ACPI table headers. All non-printable
4665 characters in the string fields are now replaced with '?' (Signature,
4667 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
4668 these fields are occasionally seen in the field. ACPICA BZ 788.
4670 Fixed a problem with predefined method repair code where the code that
4671 attempts to repair/convert an object of incorrect type is only executed
4673 the first time the predefined method is called. The mechanism that
4675 warnings on subsequent calls was interfering with the repair mechanism.
4678 Fixed a possible memory leak in the predefined validation/repair code
4681 buffer is automatically converted to an expected string object.
4683 Removed obsolete 16-bit files from the distribution and from the current
4685 tree head. ACPICA BZ 776.
4687 Example Code and Data Size: These are the sizes for the OS-independent
4688 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4689 debug version of the code includes the debug output trace mechanism and
4691 much larger code and data size.
4694 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
4695 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
4697 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
4698 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
4700 2) iASL Compiler/Disassembler and Tools:
4702 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
4703 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
4705 ACPI 4.0: iASL - implemented compile-time validation support for all new
4706 predefined names and control methods (31 total). ACPICA BZ 769.
4708 ----------------------------------------
4709 21 May 2009. Summary of changes for version 20090521:
4711 1) ACPI CA Core Subsystem:
4713 Disabled the preservation of the SCI enable bit in the PM1 control
4715 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
4718 a "preserved" bit - "OSPM always preserves this bit position", section
4719 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
4720 because the bit needs to be explicitly set by the OS as a workaround. No
4721 machines fail if the bit is not preserved. Therefore, ACPICA no longer
4722 attempts to preserve this bit.
4724 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
4725 incorrectly formed _PRT package could cause a fault. Added validation to
4726 ensure that each package element is actually a sub-package.
4728 Implemented a new interface to install or override a single control
4730 AcpiInstallMethod. This interface is useful when debugging in order to
4732 an existing method or to install a missing method without having to
4734 the entire ACPI table. See the ACPICA Programmer Reference for use and
4735 examples. Lin Ming, Bob Moore.
4737 Fixed several reference count issues with the DdbHandle object that is
4738 created from a Load or LoadTable operator. Prevent premature deletion of
4740 object. Also, mark the object as invalid once the table has been
4742 This is needed because the handle itself may not be deleted after the
4744 unload, depending on whether it has been stored in a named object by the
4747 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
4748 mutexes of the same sync level are acquired but then not released in
4750 opposite order, the internally maintained Current Sync Level becomes
4752 and can cause subsequent execution errors. ACPICA BZ 471.
4754 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
4755 specification has been changed to make the SyncLevel for mutex objects
4757 useful. When releasing a mutex, the SyncLevel of the mutex must now be
4759 same as the current sync level. This makes more sense than the previous
4761 (SyncLevel less than or equal). This change updates the code to match the
4764 Fixed a problem with the local version of the AcpiOsPurgeCache function.
4766 (local) cache must be locked during all cache object deletions. Andrew
4769 Updated the Load operator to use operation region interfaces. This
4771 direct memory mapping with region access calls. Now, all region accesses
4773 through the installed region handler as they should.
4775 Simplified and optimized the NsGetNextNode function. Reduced parameter
4777 and reduced code for this frequently used function.
4779 Example Code and Data Size: These are the sizes for the OS-independent
4780 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4781 debug version of the code includes the debug output trace mechanism and
4783 much larger code and data size.
4786 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
4787 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
4789 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
4790 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
4792 2) iASL Compiler/Disassembler and Tools:
4794 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
4796 with sub-table disassembly and handling invalid sub-tables. Attempt
4798 after an invalid sub-table ID.
4800 ----------------------------------------
4801 22 April 2009. Summary of changes for version 20090422:
4803 1) ACPI CA Core Subsystem:
4805 Fixed a compatibility issue with the recently released I/O port
4807 mechanism. For windows compatibility, 1) On a port protection violation,
4808 simply ignore the request and do not return an exception (allow the
4810 method to continue execution.) 2) If only part of the request overlaps a
4811 protected port, read/write the individual ports that are not protected.
4815 Enhanced the execution of the ASL/AML BreakPoint operator so that it
4817 breaks into the AML debugger if the debugger is present. This matches the
4818 ACPI-defined behavior.
4820 Fixed several possible warnings related to the use of the configurable
4821 ACPI_THREAD_ID. This type can now be configured as either an integer or a
4822 pointer with no warnings. Also fixes several warnings in printf-like
4823 statements for the 64-bit build when the type is configured as a pointer.
4826 Fixed a number of possible warnings when compiling with gcc 4+ (depending
4828 warning options.) Examples include printf formats, aliasing, unused
4830 missing prototypes, missing switch default statements, use of non-ANSI
4831 library functions, use of non-ANSI constructs. See generate/unix/Makefile
4833 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
4835 Example Code and Data Size: These are the sizes for the OS-independent
4836 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4837 debug version of the code includes the debug output trace mechanism and
4839 much larger code and data size.
4842 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
4843 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
4845 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
4846 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
4848 2) iASL Compiler/Disassembler and Tools:
4850 iASL: Fixed a generation warning from Bison 2.3 and fixed several
4855 iASL: Fixed a problem where the Unix/Linux versions of the compiler could
4857 correctly digest Windows/DOS formatted files (with CR/LF).
4859 iASL: Added a new option for "quiet mode" (-va) that produces only the
4860 compilation summary, not individual errors and warnings. Useful for large
4863 AcpiExec: Implemented a new option (-z) to enable a forced
4865 timeout that can be used to detect hang conditions during execution of
4867 code (includes both internal semaphores and AML-defined mutexes and
4870 Added new makefiles for the generation of acpica in a generic unix-like
4871 environment. These makefiles are intended to generate the acpica tools
4873 utilities from the original acpica git source tree structure.
4875 Test Suites: Updated and cleaned up the documentation files. Updated the
4876 copyrights to 2009, affecting all source files. Use the new version of
4878 with quiet mode. Increased the number of available semaphores in the
4880 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
4882 an alternate implementation of the semaphore timeout to allow aslts to
4883 execute fully on Cygwin.
4885 ----------------------------------------
4886 20 March 2009. Summary of changes for version 20090320:
4888 1) ACPI CA Core Subsystem:
4890 Fixed a possible race condition between AcpiWalkNamespace and dynamic
4892 unloads. Added a reader/writer locking mechanism to allow multiple
4894 namespace walks (readers), but block a dynamic table unload until it can
4896 exclusive write access to the namespace. This fixes a problem where a
4898 unload could (possibly catastrophically) delete the portion of the
4900 that is currently being examined by a walk. Adds a new file, utlock.c,
4902 implements the reader/writer lock mechanism. ACPICA BZ 749.
4904 Fixed a regression introduced in version 20090220 where a change to the
4906 handling could cause the ACPICA subsystem to access non-existent I/O
4909 Modified the handling of FADT register and table (FACS/DSDT) addresses.
4911 FADT can contain both 32-bit and 64-bit versions of these addresses.
4912 Previously, the 64-bit versions were favored, meaning that if both 32 and
4914 versions were valid, but not equal, the 64-bit version was used. This was
4915 found to cause some machines to fail. Now, in this case, the 32-bit
4917 is used instead. This now matches the Windows behavior.
4919 Implemented a new mechanism to protect certain I/O ports. Provides
4921 compatibility and protects the standard PC I/O ports from access via AML
4922 code. Adds a new file, hwvalid.c
4924 Fixed a possible extraneous warning message from the FADT support. The
4925 message warns of a 32/64 length mismatch between the legacy and GAS
4926 definitions for a register.
4928 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
4930 made obsolete by the port protection mechanism above. It was previously
4932 to validate the entire address range of an operation region, which could
4934 incorrect if the range included illegal ports, but fields within the
4935 operation region did not actually access those ports. Validation is now
4936 performed on a per-field basis instead of the entire region.
4938 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
4939 Ignored bits must be "preserved" according to the ACPI spec. Usually,
4941 means a read/modify/write when writing to the register. However, for
4943 registers, writing a one means clear the event. Writing a zero means
4945 the event (do not clear.) This behavior is clarified in the ACPI 4.0
4947 and the ACPICA code now simply always writes a zero to the ignored bit.
4949 Modified the handling of ignored bits for the PM1 A/B Control Registers.
4951 per the ACPI specification, for the control registers, preserve
4952 (read/modify/write) all bits that are defined as either reserved or
4955 Updated the handling of write-only bits in the PM1 A/B Control Registers.
4956 When reading the register, zero the write-only bits as per the ACPI spec.
4957 ACPICA BZ 443. Lin Ming.
4959 Removed "Linux" from the list of supported _OSI strings. Linux no longer
4960 wants to reply true to this request. The Windows strings are the only
4962 through the AML that are tested and known to work properly.
4965 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
4966 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
4968 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
4969 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
4971 2) iASL Compiler/Disassembler and Tools:
4973 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
4977 ----------------------------------------
4978 20 February 2009. Summary of changes for version 20090220:
4980 1) ACPI CA Core Subsystem:
4982 Optimized the ACPI register locking. Removed locking for reads from the
4984 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
4986 not required when reading the single-bit registers. The
4987 AcpiGetRegisterUnlocked function is no longer needed and has been
4989 This will improve performance for reads on these registers. ACPICA BZ
4992 Fixed the parameter validation for AcpiRead/Write. Now return
4993 AE_BAD_PARAMETER if the input register pointer is null, and
4996 the register has an address of zero. Previously, these cases simply
4998 AE_OK. For optional registers such as PM1B status/enable/control, the
5000 should check for a valid register address before calling. ACPICA BZ 748.
5002 Renamed the external ACPI bit register access functions. Renamed
5003 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
5004 functions. The new names are AcpiReadBitRegister and
5005 AcpiWriteBitRegister.
5006 Also, restructured the code for these functions by simplifying the code
5008 and condensing duplicate code to reduce code size.
5010 Added new functions to transparently handle the possibly split PM1 A/B
5011 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
5013 now handle the split registers for PM1 Status, Enable, and Control.
5018 Added a function to handle the PM1 control registers,
5019 AcpiHwWritePm1Control.
5020 This function writes both of the PM1 control registers (A/B). These
5022 are different than the PM1 A/B status and enable registers in that
5024 values can be written to the A/B registers. Most notably, the SLP_TYP
5026 can be different, as per the values returned from the _Sx predefined
5029 Removed an extra register write within AcpiHwClearAcpiStatus. This
5031 was writing an optional PM1B status register twice. The existing call to
5033 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
5035 register. ACPICA BZ 751.
5037 Split out the PM1 Status registers from the FADT. Added new globals for
5039 registers (A/B), similar to the way the PM1 Enable registers are handled.
5040 Instead of overloading the FADT Event Register blocks. This makes the
5042 clearer and less prone to error.
5044 Fixed the warning message for when the platform contains too many ACPI
5046 for the default size of the global root table data structure. The
5048 for the truncation value was incorrect.
5050 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
5051 obsolete macro, since it is now a simple reference to ->common.type.
5053 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
5055 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
5056 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
5057 simply SLEEP_TYPE. ACPICA BZ 754.
5059 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
5060 function is only needed on 64-bit host operating systems and is thus not
5061 included for 32-bit hosts.
5063 Debug output: print the input and result for invocations of the _OSI
5065 control method via the ACPI_LV_INFO debug level. Also, reduced some of
5067 verbosity of this debug level. Len Brown.
5069 Example Code and Data Size: These are the sizes for the OS-independent
5070 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5071 debug version of the code includes the debug output trace mechanism and
5073 much larger code and data size.
5076 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
5077 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
5079 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
5080 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
5082 2) iASL Compiler/Disassembler and Tools:
5084 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
5085 various legal performance profiles.
5087 ----------------------------------------
5088 23 January 2009. Summary of changes for version 20090123:
5090 1) ACPI CA Core Subsystem:
5092 Added the 2009 copyright to all module headers and signons. This affects
5093 virtually every file in the ACPICA core subsystem, the iASL compiler, and
5094 the tools/utilities.
5096 Implemented a change to allow the host to override any ACPI table,
5098 dynamically loaded tables. Previously, only the DSDT could be replaced by
5100 host. With this change, the AcpiOsTableOverride interface is called for
5102 table found in the RSDT/XSDT during ACPICA initialization, and also
5104 a table is dynamically loaded via the AML Load operator.
5106 Updated FADT flag definitions, especially the Boot Architecture flags.
5108 Debugger: For the Find command, automatically pad the input ACPI name
5110 underscores if the name is shorter than 4 characters. This enables a
5112 with the actual namespace entry which is itself padded with underscores.
5114 Example Code and Data Size: These are the sizes for the OS-independent
5115 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5116 debug version of the code includes the debug output trace mechanism and
5118 much larger code and data size.
5121 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
5122 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
5124 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
5125 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
5127 2) iASL Compiler/Disassembler and Tools:
5129 Fix build error under Bison-2.4.
5131 Dissasembler: Enhanced FADT support. Added decoding of the Boot
5133 flags. Now decode all flags, regardless of the FADT version. Flag output
5134 includes the FADT version which first defined each flag.
5136 The iASL -g option now dumps the RSDT to a file (in addition to the FADT
5138 DSDT). Windows only.
5140 ----------------------------------------
5141 04 December 2008. Summary of changes for version 20081204:
5143 1) ACPI CA Core Subsystem:
5145 The ACPICA Programmer Reference has been completely updated and revamped
5147 this release. This includes updates to the external interfaces, OSL
5148 interfaces, the overview sections, and the debugger reference.
5150 Several new ACPICA interfaces have been implemented and documented in the
5151 programmer reference:
5152 AcpiReset - Writes the reset value to the FADT-defined reset register.
5153 AcpiDisableAllGpes - Disable all available GPEs.
5154 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
5155 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
5156 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
5157 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
5158 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
5160 Most of the public ACPI hardware-related interfaces have been moved to a
5162 file, components/hardware/hwxface.c
5164 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
5165 register lengths within the FADT are now used, and the low level ACPI
5166 register access no longer hardcodes the ACPI register lengths. Given that
5167 there may be some risk in actually trusting the FADT register lengths, a
5169 time option was added to fall back to the default hardcoded lengths if
5171 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
5172 option is set to true for now, and a warning is issued if a suspicious
5174 register length is overridden with the default value.
5176 Fixed a reference count issue in NsRepairObject. This problem was
5178 in version 20081031 as part of a fix to repair Buffer objects within
5181 Added semaphore support to the Linux/Unix application OS-services layer
5182 (OSL). ACPICA BZ 448. Lin Ming.
5184 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
5186 be implemented in the OSL, or will binary semaphores be used instead.
5188 Example Code and Data Size: These are the sizes for the OS-independent
5189 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5190 debug version of the code includes the debug output trace mechanism and
5192 much larger code and data size.
5195 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
5196 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
5198 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
5199 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
5201 2) iASL Compiler/Disassembler and Tools:
5203 iASL: Completed the '-e' option to include additional ACPI tables in
5206 aid with disassembly and External statement generation. ACPICA BZ 742.
5210 iASL: Removed the "named object in while loop" error. The compiler cannot
5211 determine how many times a loop will execute. ACPICA BZ 730.
5213 Disassembler: Implemented support for FADT revision 2 (MS extension).
5217 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
5220 ----------------------------------------
5221 31 October 2008. Summary of changes for version 20081031:
5223 1) ACPI CA Core Subsystem:
5225 Restructured the ACPICA header files into public/private. acpi.h now
5227 only the "public" acpica headers. All other acpica headers are "private"
5229 should not be included by acpica users. One new file, accommon.h is used
5231 include the commonly used private headers for acpica code generation.
5233 plans include moving all private headers to a new subdirectory.
5235 Implemented an automatic Buffer->String return value conversion for
5236 predefined ACPI methods. For these methods (such as _BIF), added
5238 conversion for return objects that are required to be a String, but a
5240 was found instead. This can happen when reading string battery data from
5242 operation region, because it used to be difficult to convert the data
5244 buffer to string from within the ASL. Ensures that the host OS is
5246 with a valid null-terminated string. Linux BZ 11822.
5248 Updated the FACS waking vector interfaces. Split
5249 AcpiSetFirmwareWakingVector
5250 into two: one for the 32-bit vector, another for the 64-bit vector. This
5252 required because the host OS must setup the wake much differently for
5254 vector (real vs. protected mode, etc.) and the interface itself should
5257 deciding which vector to use. Also, eliminated the
5258 GetFirmwareWakingVector
5259 interface, as it served no purpose (only the firmware reads the vector,
5261 only writes the vector.) ACPICA BZ 731.
5263 Implemented a mechanism to escape infinite AML While() loops. Added a
5265 counter to force exit from AML While loops if the count becomes too
5267 This can occur in poorly written AML when the hardware does not respond
5268 within a while loop and the loop does not implement a timeout. The
5270 loop count is configurable. A new exception code is returned when a loop
5272 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
5274 Optimized the execution of AML While loops. Previously, a control state
5275 object was allocated and freed for each execution of the loop. The
5276 optimization is to simply reuse the control state for each iteration.
5278 speeds up the raw loop execution time by about 5%.
5280 Enhanced the implicit return mechanism. For Windows compatibility, return
5282 implicit integer of value zero for methods that contain no executable
5284 Such methods are seen in the field as stubs (presumably), and can cause
5285 drivers to fail if they expect a return value. Lin Ming.
5287 Allow multiple backslashes as root prefixes in namepaths. In a fully
5288 qualified namepath, allow multiple backslash prefixes. This can happen
5290 is seen in the field) because of the use of a double-backslash in strings
5291 (since backslash is the escape character) causing confusion. ACPICA BZ
5295 Emit a warning if two different FACS or DSDT tables are discovered in the
5296 FADT. Checks if there are two valid but different addresses for the FACS
5298 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
5300 Consolidated the method argument count validation code. Merged the code
5302 validates control method argument counts into the predefined validation
5303 module. Eliminates possible multiple warnings for incorrect argument
5306 Implemented ACPICA example code. Includes code for ACPICA initialization,
5307 handler installation, and calling a control method. Available at
5308 source/tools/examples.
5310 Added a global pointer for FACS table to simplify internal FACS access.
5312 the global pointer instead of using AcpiGetTableByIndex for each FACS
5314 This simplifies the code for the Global Lock and the Firmware Waking
5317 Example Code and Data Size: These are the sizes for the OS-independent
5318 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5319 debug version of the code includes the debug output trace mechanism and
5321 much larger code and data size.
5324 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
5325 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
5327 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
5328 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
5330 2) iASL Compiler/Disassembler and Tools:
5332 iASL: Improved disassembly of external method calls. Added the -e option
5334 allow the inclusion of additional ACPI tables to help with the
5337 method invocations and the generation of external declarations during the
5338 disassembly. Certain external method invocations cannot be disassembled
5339 properly without the actual declaration of the method. Use the -e option
5341 include the table where the external method(s) are actually declared.
5343 useful for disassembling SSDTs that make method calls back to the master
5344 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl
5346 -e dsdt.aml ssdt1.aml
5348 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
5349 problem where the use of an alias within a namepath would result in a not
5350 found error or cause the compiler to fault. Also now allows forward
5351 references from the Alias operator itself. ACPICA BZ 738.
5353 ----------------------------------------
5354 26 September 2008. Summary of changes for version 20080926:
5356 1) ACPI CA Core Subsystem:
5358 Designed and implemented a mechanism to validate predefined ACPI methods
5360 objects. This code validates the predefined ACPI objects (objects whose
5362 start with underscore) that appear in the namespace, at the time they are
5363 evaluated. The argument count and the type of the returned object are
5364 validated against the ACPI specification. The purpose of this validation
5366 to detect problems with the BIOS-implemented predefined ACPI objects
5368 the results are returned to the ACPI-related drivers. Future enhancements
5370 include actual repair of incorrect return objects where possible. Two new
5371 files are nspredef.c and acpredef.h.
5373 Fixed a fault in the AML parser if a memory allocation fails during the
5375 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
5377 Fixed an issue with implicit return compatibility. This change improves
5379 implicit return mechanism to be more compatible with the MS interpreter.
5381 Ming, ACPICA BZ 349.
5383 Implemented support for zero-length buffer-to-string conversions. Allow
5385 length strings during interpreter buffer-to-string conversions. For
5387 during the ToDecimalString and ToHexString operators, as well as implicit
5388 conversions. Fiodor Suietov, ACPICA BZ 585.
5390 Fixed two possible memory leaks in the error exit paths of
5391 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
5393 similar in that they use a stack of state objects in order to eliminate
5394 recursion. The stack must be fully unwound and deallocated if an error
5395 occurs. Lin Ming. ACPICA BZ 383.
5397 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
5399 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
5400 Moore ACPICA BZ 442.
5402 Removed the obsolete version number in module headers. Removed the
5403 "$Revision" number that appeared in each module header. This version
5405 was useful under SourceSafe and CVS, but has no meaning under git. It is
5407 only incorrect, it could also be misleading.
5409 Example Code and Data Size: These are the sizes for the OS-independent
5410 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5411 debug version of the code includes the debug output trace mechanism and
5413 much larger code and data size.
5416 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
5417 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
5419 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
5420 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
5422 ----------------------------------------
5423 29 August 2008. Summary of changes for version 20080829:
5425 1) ACPI CA Core Subsystem:
5427 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
5428 Reference. Changes include the elimination of cheating on the Object
5430 for the DdbHandle subtype, addition of a reference class field to
5431 differentiate the various reference types (instead of an AML opcode), and
5433 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
5435 Reduce an error to a warning for an incorrect method argument count.
5436 Previously aborted with an error if too few arguments were passed to a
5437 control method via the external ACPICA interface. Now issue a warning
5439 and continue. Handles the case where the method inadvertently declares
5441 many arguments, but does not actually use the extra ones. Applies mainly
5443 the predefined methods. Lin Ming. Linux BZ 11032.
5445 Disallow the evaluation of named object types with no intrinsic value.
5447 AE_TYPE for objects that have no value and therefore evaluation is
5449 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
5451 these types were allowed, but an exception would be generated at some
5453 during the evaluation. Now, the error is generated up front.
5455 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
5456 (nsnames.c). Fixes a leak in the error exit path.
5458 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
5460 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
5462 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
5465 Removed obsolete and/or unused exception codes from the acexcep.h header.
5466 There is the possibility that certain device drivers may be affected if
5468 use any of these exceptions.
5470 The ACPICA documentation has been added to the public git source tree,
5472 acpica/documents. Included are the ACPICA programmer reference, the iASL
5473 compiler reference, and the changes.txt release logfile.
5475 Example Code and Data Size: These are the sizes for the OS-independent
5476 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5477 debug version of the code includes the debug output trace mechanism and
5479 much larger code and data size.
5482 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
5483 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
5485 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
5486 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
5488 2) iASL Compiler/Disassembler and Tools:
5490 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
5491 defines _SCP with 3 arguments. Previous versions defined it with only 1
5492 argument. iASL now allows both definitions.
5494 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
5496 length subtables when disassembling ACPI tables. Also fixed a couple of
5497 errors where a full 16-bit table type field was not extracted from the
5501 acpisrc: Improve comment counting mechanism for generating source code
5502 statistics. Count first and last lines of multi-line comments as
5504 not comment lines. Handle Linux legal header in addition to standard
5508 ----------------------------------------
5510 29 July 2008. Summary of changes for version 20080729:
5512 1) ACPI CA Core Subsystem:
5514 Fix a possible deadlock in the GPE dispatch. Remove call to
5515 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
5517 to acquire the GPE lock but can deadlock since the GPE lock is already
5519 at dispatch time. This code was introduced in version 20060831 as a
5521 to Linux BZ 6881 and has since been removed from Linux.
5523 Add a function to dereference returned reference objects. Examines the
5525 object from a call to AcpiEvaluateObject. Any Index or RefOf references
5527 automatically dereferenced in an attempt to return something useful
5529 reference types cannot be converted into an external ACPI_OBJECT.)
5531 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
5533 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
5534 subtables for the MADT and one new subtable for the SRAT. Includes
5535 disassembler and AcpiSrc support. Data from the Intel 64 Architecture
5537 Specification, June 2008.
5539 Additional error checking for pathname utilities. Add error check after
5541 calls to AcpiNsGetPathnameLength. Add status return from
5542 AcpiNsBuildExternalPath and check after all calls. Add parameter
5544 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
5546 Return status from the global init function AcpiUtGlobalInitialize. This
5548 used by both the kernel subsystem and the utilities such as iASL
5550 The function could possibly fail when the caches are initialized. Yang
5553 Add a function to decode reference object types to strings. Created for
5554 improved error messages.
5556 Improve object conversion error messages. Better error messages during
5558 conversion from internal to the external ACPI_OBJECT. Used for external
5560 to AcpiEvaluateObject.
5562 Example Code and Data Size: These are the sizes for the OS-independent
5563 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5564 debug version of the code includes the debug output trace mechanism and
5566 much larger code and data size.
5569 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
5570 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
5572 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
5573 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
5575 2) iASL Compiler/Disassembler and Tools:
5577 Debugger: fix a possible hang when evaluating non-methods. Fixes a
5579 introduced in version 20080701. If the object being evaluated (via
5581 command) is not a method, the debugger can hang while trying to obtain
5583 existent parameters.
5585 iASL: relax error for using reserved "_T_x" identifiers. These names can
5586 appear in a disassembled ASL file if they were emitted by the original
5587 compiler. Instead of issuing an error or warning and forcing the user to
5588 manually change these names, issue a remark instead.
5590 iASL: error if named object created in while loop. Emit an error if any
5592 object is created within a While loop. If allowed, this code will
5595 run-time error on the second iteration of the loop when an attempt is
5598 create the same named object twice. ACPICA bugzilla 730.
5600 iASL: Support absolute pathnames for include files. Add support for
5602 pathnames within the Include operator. previously, only relative
5606 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
5608 The ACPI spec requires one interrupt minimum. BZ 423
5610 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
5611 Handles the case for the Interrupt Resource Descriptor where
5612 the ResourceSource argument is omitted but ResourceSourceIndex
5613 is present. Now leave room for the Index. BZ 426
5615 iASL: Prevent error message if CondRefOf target does not exist. Fixes
5617 where an error message is emitted if the target does not exist. BZ 516
5619 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
5620 (get ACPI tables on Windows). This was apparently broken in version
5623 AcpiXtract: Handle EOF while extracting data. Correctly handle the case
5625 the EOF happens immediately after the last table in the input file. Print
5626 completion message. Previously, no message was displayed in this case.
5628 ----------------------------------------
5629 01 July 2008. Summary of changes for version 20080701:
5631 0) Git source tree / acpica.org
5633 Fixed a problem where a git-clone from http would not transfer the entire
5636 1) ACPI CA Core Subsystem:
5638 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
5639 enable bit. Now performs a read-change-write of the enable register
5641 of simply writing out the cached enable mask. This will prevent
5643 enabling of GPEs if a rogue GPE is received during initialization (before
5645 handlers are installed.)
5647 Implemented a copy for dynamically loaded tables. Previously, dynamically
5648 loaded tables were simply mapped - but on some machines this memory is
5649 corrupted after suspend. Now copy the table to a local buffer. For the
5650 OpRegion case, added checksum verify. Use the table length from the table
5651 header, not the region length. For the Buffer case, use the table length
5652 also. Dennis Noordsij, Bob Moore. BZ 10734
5654 Fixed a problem where the same ACPI table could not be dynamically loaded
5656 unloaded more than once. Without this change, a table cannot be loaded
5658 once it has been loaded/unloaded one time. The current mechanism does not
5659 unregister a table upon an unload. During a load, if the same table is
5661 this no longer returns an exception. BZ 722
5663 Fixed a problem where the wrong descriptor length was calculated for the
5664 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
5666 are calculated as 12 bytes long, but the actual length in the internal
5667 descriptor is 16 because of the round-up to 8 on the 64-bit build.
5669 by Linn Crosetto. BZ 728
5671 Fixed a possible memory leak in the Unload operator. The DdbHandle
5673 by Load() did not have its reference count decremented during unload,
5675 to a memory leak. Lin Ming. BZ 727
5677 Fixed a possible memory leak when deleting thermal/processor objects. Any
5678 associated notify handlers (and objects) were not being deleted. Fiodor
5681 Fixed the ordering of the ASCII names in the global mutex table to match
5683 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
5685 Vegard Nossum. BZ 726
5687 Enhanced the AcpiGetObjectInfo interface to return the number of required
5688 arguments if the object is a control method. Added this call to the
5690 so the proper number of default arguments are passed to a method. This
5691 prevents a warning when executing methods from AcpiExec.
5693 Added a check for an invalid handle in AcpiGetObjectInfo. Return
5694 AE_BAD_PARAMETER if input handle is invalid. BZ 474
5696 Fixed an extraneous warning from exconfig.c on the 64-bit build.
5698 Example Code and Data Size: These are the sizes for the OS-independent
5699 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5700 debug version of the code includes the debug output trace mechanism and
5702 much larger code and data size.
5705 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
5706 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
5708 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
5709 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
5711 2) iASL Compiler/Disassembler and Tools:
5713 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
5714 resource descriptor names.
5716 iASL: Detect invalid ASCII characters in input (windows version). Removed
5718 "-CF" flag from the flex compile, enables correct detection of non-ASCII
5719 characters in the input. BZ 441
5721 iASL: Eliminate warning when result of LoadTable is not used. Eliminate
5723 "result of operation not used" warning when the DDB handle returned from
5724 LoadTable is not used. The warning is not needed. BZ 590
5726 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
5729 pass address of table to the AML. Added option to disable OpRegion
5731 to allow creation of an OpRegion with a real address that was passed to
5733 All of this allows testing of the Load and Unload operators from
5736 Debugger: update tables command for unloaded tables. Handle unloaded
5738 and use the standard table header output routine.
5740 ----------------------------------------
5741 09 June 2008. Summary of changes for version 20080609:
5743 1) ACPI CA Core Subsystem:
5745 Implemented a workaround for reversed _PRT entries. A significant number
5747 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
5748 change dynamically detects and repairs this problem. Provides
5750 with MS ACPI. BZ 6859
5752 Simplified the internal ACPI hardware interfaces to eliminate the locking
5753 flag parameter from Register Read/Write. Added a new external interface,
5754 AcpiGetRegisterUnlocked.
5756 Fixed a problem where the invocation of a GPE control method could hang.
5758 was a regression introduced in 20080514. The new method argument count
5759 validation mechanism can enter an infinite loop when a GPE method is
5760 dispatched. Problem fixed by removing the obsolete code that passed GPE
5762 information to the notify handler via the control method parameter
5765 Fixed a problem where the _SST execution status was incorrectly returned
5767 the caller of AcpiEnterSleepStatePrep. This was a regression introduced
5769 20080514. _SST is optional and a NOT_FOUND exception should never be
5772 Fixed a problem where a deleted object could be accessed from within the
5774 parser. This was a regression introduced in version 20080123 as a fix for
5776 Unload operator. Lin Ming. BZ 10669
5778 Cleaned up the debug operand dump mechanism. Eliminated unnecessary
5780 and eliminated the use of a negative index in a loop. Operands are now
5781 displayed in the correct order, not backwards. This also fixes a
5783 introduced in 20080514 on 64-bit systems where the elimination of
5784 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
5787 Fixed a possible memory leak in EvPciConfigRegionSetup where the error
5789 path did not delete a locally allocated structure.
5791 Updated definitions for the DMAR and SRAT tables to synchronize with the
5792 current specifications. Includes disassembler support.
5794 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
5795 loop termination value was used. Loop terminated on iteration early,
5797 one mutex. Linn Crosetto
5799 Example Code and Data Size: These are the sizes for the OS-independent
5800 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5801 debug version of the code includes the debug output trace mechanism and
5803 much larger code and data size.
5806 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
5807 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
5809 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
5810 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
5812 2) iASL Compiler/Disassembler and Tools:
5814 Disassembler: Implemented support for EisaId() within _CID objects. Now
5815 disassemble integer _CID objects back to EisaId invocations, including
5816 multiple integers within _CID packages. Includes single-step support for
5819 Disassembler: Added support for DMAR and SRAT table definition changes.
5821 ----------------------------------------
5822 14 May 2008. Summary of changes for version 20080514:
5824 1) ACPI CA Core Subsystem:
5826 Fixed a problem where GPEs were enabled too early during the ACPICA
5827 initialization. This could lead to "handler not installed" errors on some
5828 machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
5830 ensures that all operation regions and devices throughout the namespace
5832 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
5834 Implemented a change to the enter sleep code. Moved execution of the _GTS
5835 method to just before setting sleep enable bit. The execution was moved
5837 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
5838 immediately before the SLP_EN bit is set, as per the ACPI specification.
5841 Implemented a fix to disable unknown GPEs (2nd version). Now always
5843 the GPE, even if ACPICA thinks that that it is already disabled. It is
5844 possible that the AML or some other code has enabled the GPE unbeknownst
5848 Fixed a problem with the Field operator where zero-length fields would
5850 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
5852 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
5854 Implemented a fix for the Load operator, now load the table at the
5856 root. This reverts a change introduced in version 20071019. The table is
5858 loaded at the namespace root even though this goes against the ACPI
5859 specification. This provides compatibility with other ACPI
5861 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
5864 Fixed a problem where ACPICA would not Load() tables with unusual
5866 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
5867 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
5868 Therefore, signature validation is worthless. Apparently MS ACPI accepts
5870 signatures, ACPICA must be compatible. BZ 10454.
5872 Fixed a possible negative array index in AcpiUtValidateException. Added
5874 fields to the exception string arrays to eliminate a -1 subtraction on
5878 Updated the debug tracking macros to reduce overall code and data size.
5879 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
5880 instead of pointers to static strings. Jan Beulich and Bob Moore.
5882 Implemented argument count checking in control method invocation via
5883 AcpiEvaluateObject. Now emit an error if too few arguments, warning if
5885 many. This applies only to extern programmatic control method execution,
5887 method-to-method calls within the AML. Lin Ming.
5889 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
5891 longer needed, especially with the removal of 16-bit support. It was
5893 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
5896 32/64-bit platforms is required.
5898 Added the C const qualifier for appropriate string constants -- mostly
5899 MODULE_NAME and printf format strings. Jan Beulich.
5901 Example Code and Data Size: These are the sizes for the OS-independent
5902 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5903 debug version of the code includes the debug output trace mechanism and
5905 much larger code and data size.
5908 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
5909 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
5911 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
5912 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
5914 2) iASL Compiler/Disassembler and Tools:
5916 Implemented ACPI table revision ID validation in the disassembler. Zero
5918 always invalid. For DSDTs, the ID controls the interpreter integer width.
5920 means 32-bit and this is unusual. 2 or greater is 64-bit.
5922 ----------------------------------------
5923 21 March 2008. Summary of changes for version 20080321:
5925 1) ACPI CA Core Subsystem:
5927 Implemented an additional change to the GPE support in order to suppress
5928 spurious or stray GPEs. The AcpiEvDisableGpe function will now
5930 disable incoming GPEs that are neither enabled nor disabled -- meaning
5932 the GPE is unknown to the system. This should prevent future interrupt
5934 from that GPE. BZ 6217 (Zhang Rui)
5936 Fixed a problem where NULL package elements were not returned to the
5937 AcpiEvaluateObject interface correctly. The element was simply ignored
5938 instead of returning a NULL ACPI_OBJECT package element, potentially
5940 a buffer overflow and/or confusing the caller who expected a fixed number
5942 elements. BZ 10132 (Lin Ming, Bob Moore)
5944 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
5946 Qword), Field, BankField, and IndexField operators when invoked from
5948 an executing control method. In this case, these operators created
5950 nodes that were incorrectly left marked as permanent nodes instead of
5951 temporary nodes. This could cause a problem if there is race condition
5952 between an exiting control method and a running namespace walk. (Reported
5956 Fixed a problem where the CreateField and CreateXXXField operators would
5957 incorrectly allow duplicate names (the name of the field) with no
5961 Implemented several changes for Notify handling. Added support for new
5963 values (ACPI 2.0+) and improved the Notify debug output. Notify on
5964 PowerResource objects is no longer allowed, as per the ACPI
5966 (Bob Moore, Zhang Rui)
5968 All Reference Objects returned via the AcpiEvaluateObject interface are
5970 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
5972 NULL objects - either NULL package elements or unresolved named
5975 Fixed a problem where an extraneous debug message was produced for
5977 objects (when debugging enabled). The message "Package List length larger
5978 than NumElements count" is now produced in the correct case, and is now
5980 error message rather than a debug message. Added a debug message for the
5981 opposite case, where NumElements is larger than the Package List (the
5983 will be padded out with NULL elements as per the ACPI spec.)
5985 Implemented several improvements for the output of the ASL "Debug" object
5987 clarify and keep all data for a given object on one output line.
5989 Fixed two size calculation issues with the variable-length Start
5991 resource descriptor.
5993 Example Code and Data Size: These are the sizes for the OS-independent
5994 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5995 debug version of the code includes the debug output trace mechanism and
5997 a much larger code and data size.
6000 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
6001 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
6003 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
6004 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
6006 2) iASL Compiler/Disassembler and Tools:
6008 Fixed a problem with the use of the Switch operator where execution of
6010 containing method by multiple concurrent threads could cause an
6011 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
6012 actual Switch opcode, it must be simulated with local named temporary
6013 variables and if/else pairs. The solution chosen was to mark any method
6015 uses Switch as Serialized, thus preventing multiple thread entries. BZ
6018 ----------------------------------------
6019 13 February 2008. Summary of changes for version 20080213:
6021 1) ACPI CA Core Subsystem:
6023 Implemented another MS compatibility design change for GPE/Notify
6025 GPEs are now cleared/enabled asynchronously to allow all pending notifies
6027 complete first. It is expected that the OSL will queue the enable request
6028 behind all pending notify requests (may require changes to the local host
6030 in AcpiOsExecute). Alexey Starikovskiy.
6032 Fixed a problem where buffer and package objects passed as arguments to a
6033 control method via the external AcpiEvaluateObject interface could cause
6035 AE_AML_INTERNAL exception depending on the order and type of operators
6036 executed by the target control method.
6038 Fixed a problem where resource descriptor size optimization could cause a
6039 problem when a _CRS resource template is passed to a _SRS method. The
6041 resource template must use the same descriptors (with the same size) as
6042 returned from _CRS. This change affects the following resource
6044 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
6047 Fixed a problem where a CopyObject to RegionField, BankField, and
6049 objects did not perform an implicit conversion as it should. These types
6051 retain their initial type permanently as per the ACPI specification.
6053 a CopyObject to all other object types should not perform an implicit
6054 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
6056 Fixed a problem with the AcpiGetDevices interface where the mechanism to
6057 match device CIDs did not examine the entire list of available CIDs, but
6058 instead aborted on the first non-matching CID. Andrew Patterson.
6060 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
6062 inadvertently changed to return a 16-bit value instead of a 32-bit value,
6063 truncating the upper dword of a 64-bit value. This macro is only used to
6064 display debug output, so no incorrect calculations were made. Also,
6065 reimplemented the macro so that a 64-bit shift is not performed by
6066 inefficient compilers.
6068 Added missing va_end statements that should correspond with each va_start
6071 Example Code and Data Size: These are the sizes for the OS-independent
6072 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6073 debug version of the code includes the debug output trace mechanism and
6075 a much larger code and data size.
6078 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
6079 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
6081 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
6082 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
6084 2) iASL Compiler/Disassembler and Tools:
6086 Implemented full disassembler support for the following new ACPI tables:
6087 BERT, EINJ, and ERST. Implemented partial disassembler support for the
6088 complicated HEST table. These tables support the Windows Hardware Error
6089 Architecture (WHEA).
6091 ----------------------------------------
6092 23 January 2008. Summary of changes for version 20080123:
6094 1) ACPI CA Core Subsystem:
6096 Added the 2008 copyright to all module headers and signons. This affects
6097 virtually every file in the ACPICA core subsystem, the iASL compiler, and
6098 the tools/utilities.
6100 Fixed a problem with the SizeOf operator when used with Package and
6102 objects. These objects have deferred execution for some arguments, and
6104 execution is now completed before the SizeOf is executed. This problem
6106 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
6110 Implemented an enhancement to the interpreter "slack mode". In the
6113 an explicit return or an implicitly returned object from the last
6115 opcode, a control method will now implicitly return an integer of value 0
6117 Microsoft compatibility. (Lin Ming) BZ 392
6119 Fixed a problem with the Load operator where an exception was not
6122 the case where the table is already loaded. (Lin Ming) BZ 463
6124 Implemented support for the use of DDBHandles as an Indexed Reference, as
6126 the ACPI spec. (Lin Ming) BZ 486
6128 Implemented support for UserTerm (Method invocation) for the Unload
6130 as per the ACPI spec. (Lin Ming) BZ 580
6132 Fixed a problem with the LoadTable operator where the OemId and
6134 input strings could cause unexpected failures if they were shorter than
6136 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
6138 Implemented support for UserTerm (Method invocation) for the Unload
6140 as per the ACPI spec. (Lin Ming) BZ 580
6142 Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
6144 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
6146 Example Code and Data Size: These are the sizes for the OS-independent
6147 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6148 debug version of the code includes the debug output trace mechanism and
6150 a much larger code and data size.
6153 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
6154 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
6156 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
6157 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
6159 2) iASL Compiler/Disassembler and Tools:
6161 Implemented support in the disassembler for checksum validation on
6163 binary DSDTs and SSDTs. If incorrect, a message is displayed within the
6165 header dump at the start of the disassembly.
6167 Implemented additional debugging information in the namespace listing
6169 created during compilation. In addition to the namespace hierarchy, the
6171 pathname to each namespace object is displayed.
6173 Fixed a problem with the disassembler where invalid ACPI tables could
6175 faults or infinite loops.
6177 Fixed an unexpected parse error when using the optional "parameter types"
6178 list in a control method declaration. (Lin Ming) BZ 397
6180 Fixed a problem where two External declarations with the same name did
6182 cause an error (Lin Ming) BZ 509
6184 Implemented support for full TermArgs (adding Argx, Localx and method
6185 invocation) for the ParameterData parameter to the LoadTable operator.
6189 ----------------------------------------
6190 19 December 2007. Summary of changes for version 20071219:
6192 1) ACPI CA Core Subsystem:
6194 Implemented full support for deferred execution for the TermArg string
6195 arguments for DataTableRegion. This enables forward references and full
6196 operand resolution for the three string arguments. Similar to
6198 deferred argument execution.) Lin Ming. BZ 430
6200 Implemented full argument resolution support for the BankValue argument
6202 BankField. Previously, only constants were supported, now any TermArg may
6204 used. Lin Ming BZ 387, 393
6206 Fixed a problem with AcpiGetDevices where the search of a branch of the
6207 device tree could be terminated prematurely. In accordance with the ACPI
6208 specification, the search down the current branch is terminated if a
6210 is both not present and not functional (instead of just not present.)
6214 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
6216 the underlying AML code changed the GPE enable registers. Now, any
6218 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
6220 instead of simply ignored. Rui Zhang.
6222 Fixed a problem with Index Fields where the Index register was
6224 limited to a maximum of 32 bits. Now any size may be used.
6226 Fixed a couple memory leaks associated with "implicit return" objects
6228 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
6230 Example Code and Data Size: These are the sizes for the OS-independent
6231 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6232 debug version of the code includes the debug output trace mechanism and
6234 a much larger code and data size.
6237 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
6238 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
6240 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
6241 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
6243 ----------------------------------------
6244 14 November 2007. Summary of changes for version 20071114:
6246 1) ACPI CA Core Subsystem:
6248 Implemented event counters for each of the Fixed Events, the ACPI SCI
6249 (interrupt) itself, and control methods executed. Named
6250 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
6252 should be useful for debugging and statistics.
6254 Implemented a new external interface, AcpiGetStatistics, to retrieve the
6255 contents of the various event counters. Returns the current values for
6256 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
6257 AcpiMethodCount. The interface can be expanded in the future if new
6259 are added. Device drivers should use this interface rather than access
6263 Fixed a problem with the FromBCD and ToBCD operators. With some
6265 the ShortDivide function worked incorrectly, causing problems with the
6267 functions with large input values. A truncation from 64-bit to 32-bit
6268 inadvertently occurred. Internal BZ 435. Lin Ming
6270 Fixed a problem with Index references passed as method arguments.
6272 passed as arguments to control methods were dereferenced immediately
6274 control was passed to the called method). The references are now
6276 passed directly to the called method. BZ 5389. Lin Ming
6278 Fixed a problem with CopyObject used in conjunction with the Index
6280 The reference was incorrectly dereferenced before the copy. The reference
6282 now correctly copied. BZ 5391. Lin Ming
6284 Fixed a problem with Control Method references within Package objects.
6286 references are now correctly generated. This completes the package
6287 construction overhaul that began in version 20071019.
6289 Example Code and Data Size: These are the sizes for the OS-independent
6290 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6291 debug version of the code includes the debug output trace mechanism and
6293 a much larger code and data size.
6296 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
6297 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
6299 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
6300 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
6303 2) iASL Compiler/Disassembler and Tools:
6305 The AcpiExec utility now installs handlers for all of the predefined
6306 Operation Region types. New types supported are: PCI_Config, CMOS, and
6309 Fixed a problem with the 64-bit version of AcpiExec where the extended
6311 bit) address fields for the DSDT and FACS within the FADT were not being
6312 used, causing truncation of the upper 32-bits of these addresses. Lin
6316 ----------------------------------------
6317 19 October 2007. Summary of changes for version 20071019:
6319 1) ACPI CA Core Subsystem:
6321 Fixed a problem with the Alias operator when the target of the alias is a
6322 named ASL operator that opens a new scope -- Scope, Device,
6324 Processor, and ThermalZone. In these cases, any children of the original
6325 operator could not be accessed via the alias, potentially causing
6327 AE_NOT_FOUND exceptions. (BZ 9067)
6329 Fixed a problem with the Package operator where all named references were
6330 created as object references and left otherwise unresolved. According to
6332 ACPI specification, a Package can only contain Data Objects or references
6334 control methods. The implication is that named references to Data Objects
6335 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
6336 immediately upon package creation. This is the approach taken with this
6337 change. References to all other named objects (Methods, Devices, Scopes,
6338 etc.) are all now properly created as reference objects. (BZ 5328)
6340 Reverted a change to Notify handling that was introduced in version
6341 20070508. This version changed the Notify handling from asynchronous to
6342 fully synchronous (Device driver Notify handling with respect to the
6344 ASL operator). It was found that this change caused more problems than it
6345 solved and was removed by most users.
6347 Fixed a problem with the Increment and Decrement operators where the type
6349 the target object could be unexpectedly and incorrectly changed. (BZ 353)
6352 Fixed a problem with the Load and LoadTable operators where the table
6353 location within the namespace was ignored. Instead, the table was always
6354 loaded into the root or current scope. Lin Ming.
6356 Fixed a problem with the Load operator when loading a table from a buffer
6357 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
6359 Fixed a problem with the Debug object where a store of a DdbHandle
6361 object to the Debug object could cause a fault.
6363 Added a table checksum verification for the Load operator, in the case
6365 the load is from a buffer. (BZ 578).
6367 Implemented additional parameter validation for the LoadTable operator.
6369 length of the input strings SignatureString, OemIdString, and OemTableId
6371 now checked for maximum lengths. (BZ 582) Lin Ming.
6373 Example Code and Data Size: These are the sizes for the OS-independent
6374 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6375 debug version of the code includes the debug output trace mechanism and
6377 a much larger code and data size.
6380 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
6381 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
6383 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
6384 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
6387 2) iASL Compiler/Disassembler:
6389 Fixed a problem where if a single file was specified and the file did not
6390 exist, no error message was emitted. (Introduced with wildcard support in
6393 ----------------------------------------
6394 19 September 2007. Summary of changes for version 20070919:
6396 1) ACPI CA Core Subsystem:
6398 Designed and implemented new external interfaces to install and remove
6399 handlers for ACPI table-related events. Current events that are defined
6401 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
6402 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
6403 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
6405 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
6406 (acpi_serialized option on Linux) could cause some systems to hang during
6407 initialization. (Bob Moore) BZ 8171
6409 Fixed a problem where objects of certain types (Device, ThermalZone,
6410 Processor, PowerResource) can be not found if they are declared and
6411 referenced from within the same control method (Lin Ming) BZ 341
6413 Example Code and Data Size: These are the sizes for the OS-independent
6414 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6415 debug version of the code includes the debug output trace mechanism and
6417 a much larger code and data size.
6420 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
6421 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
6423 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
6424 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
6427 2) iASL Compiler/Disassembler:
6429 Implemented support to allow multiple files to be compiled/disassembled
6432 single invocation. This includes command line wildcard support for both
6434 Windows and Unix versions of the compiler. This feature simplifies the
6435 disassembly and compilation of multiple ACPI tables in a single
6438 ----------------------------------------
6439 08 May 2007. Summary of changes for version 20070508:
6441 1) ACPI CA Core Subsystem:
6443 Implemented a Microsoft compatibility design change for the handling of
6445 Notify AML operator. Previously, notify handlers were dispatched and
6446 executed completely asynchronously in a deferred thread. The new design
6447 still executes the notify handlers in a different thread, but the
6449 thread that executed the Notify() now waits at a synchronization point
6451 the notify handler to complete. Some machines depend on a synchronous
6453 operator in order to operate correctly.
6455 Implemented support to allow Package objects to be passed as method
6456 arguments to the external AcpiEvaluateObject interface. Previously, this
6457 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
6458 implemented since there were no reserved control methods that required it
6461 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
6463 contained invalid non-zero values in reserved fields could cause later
6464 failures because these fields have meaning in later revisions of the
6466 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
6468 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
6470 Fixed a problem where the Global Lock handle was not properly updated if
6472 thread that acquired the Global Lock via executing AML code then
6474 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
6478 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
6479 could be corrupted if the interrupt being removed was at the head of the
6480 list. Reported by Linn Crosetto.
6482 Example Code and Data Size: These are the sizes for the OS-independent
6483 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6484 debug version of the code includes the debug output trace mechanism and
6486 a much larger code and data size.
6489 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
6490 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
6492 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
6493 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
6495 ----------------------------------------
6496 20 March 2007. Summary of changes for version 20070320:
6498 1) ACPI CA Core Subsystem:
6500 Implemented a change to the order of interpretation and evaluation of AML
6501 operand objects within the AML interpreter. The interpreter now evaluates
6502 operands in the order that they appear in the AML stream (and the
6503 corresponding ASL code), instead of in the reverse order (after the
6505 operand list has been parsed). The previous behavior caused several
6507 incompatibilities with the Microsoft AML interpreter as well as being
6508 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
6510 Implemented a change to the ACPI Global Lock support. All interfaces to
6512 global lock now allow the same thread to acquire the lock multiple times.
6513 This affects the AcpiAcquireGlobalLock external interface to the global
6515 as well as the internal use of the global lock to support AML fields -- a
6516 control method that is holding the global lock can now simultaneously
6518 AML fields that require global lock protection. Previously, in both
6520 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
6522 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
6523 Controller. There is no change to the behavior of the AML Acquire
6525 as this can already be used to acquire a mutex multiple times by the same
6526 thread. BZ 8066. With assistance from Alexey Starikovskiy.
6528 Fixed a problem where invalid objects could be referenced in the AML
6529 Interpreter after error conditions. During operand evaluation, ensure
6531 the internal "Return Object" field is cleared on error and only valid
6532 pointers are stored there. Caused occasional access to deleted objects
6534 resulted in "large reference count" warning messages. Valery Podrezov.
6536 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
6538 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
6541 Fixed an internal problem with the handling of result objects on the
6542 interpreter result stack. BZ 7872. Valery Podrezov.
6544 Removed obsolete code that handled the case where AML_NAME_OP is the
6546 of a reference (Reference.Opcode). This code was no longer necessary. BZ
6547 7874. Valery Podrezov.
6549 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
6552 remnant from the previously discontinued 16-bit support.
6554 Example Code and Data Size: These are the sizes for the OS-independent
6555 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6556 debug version of the code includes the debug output trace mechanism and
6558 a much larger code and data size.
6561 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
6562 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
6564 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
6565 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
6567 ----------------------------------------
6568 26 January 2007. Summary of changes for version 20070126:
6570 1) ACPI CA Core Subsystem:
6572 Added the 2007 copyright to all module headers and signons. This affects
6573 virtually every file in the ACPICA core subsystem, the iASL compiler, and
6576 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
6577 during a table load. A bad pointer was passed in the case where the DSDT
6579 overridden, causing a fault in this case.
6581 Example Code and Data Size: These are the sizes for the OS-independent
6582 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6583 debug version of the code includes the debug output trace mechanism and
6585 a much larger code and data size.
6588 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
6589 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
6591 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
6592 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
6594 ----------------------------------------
6595 15 December 2006. Summary of changes for version 20061215:
6597 1) ACPI CA Core Subsystem:
6599 Support for 16-bit ACPICA has been completely removed since it is no
6601 necessary and it clutters the code. All 16-bit macros, types, and
6602 conditional compiles have been removed, cleaning up and simplifying the
6604 across the entire subsystem. DOS support is no longer needed since the
6605 bootable Linux firmware kit is now available.
6607 The handler for the Global Lock is now removed during AcpiTerminate to
6608 enable a clean subsystem restart, via the implementation of the
6609 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
6612 Implemented enhancements to the multithreading support within the
6614 to enable improved multithreading debugging and evaluation of the
6618 Debugger: Enhanced the Statistics/Memory command to emit the total
6620 memory used during the execution, as well as the maximum memory consumed
6622 each of the various object types. (Valery Podrezov)
6624 Example Code and Data Size: These are the sizes for the OS-independent
6625 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6626 debug version of the code includes the debug output trace mechanism and
6628 a much larger code and data size.
6631 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
6632 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
6634 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
6635 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
6638 2) iASL Compiler/Disassembler and Tools:
6640 AcpiExec: Implemented a new option (-m) to display full memory use
6641 statistics upon subsystem/program termination. (Valery Podrezov)
6643 ----------------------------------------
6644 09 November 2006. Summary of changes for version 20061109:
6646 1) ACPI CA Core Subsystem:
6648 Optimized the Load ASL operator in the case where the source operand is
6650 operation region. Simply map the operation region memory, instead of
6651 performing a bytewise read. (Region must be of type SystemMemory, see
6654 Fixed the Load ASL operator for the case where the source operand is a
6655 region field. A buffer object is also allowed as the source operand. BZ
6658 Fixed a problem where the Load ASL operator allowed the source operand to
6660 an operation region of any type. It is now restricted to regions of type
6661 SystemMemory, as per the ACPI specification. BZ 481
6663 Additional cleanup and optimizations for the new Table Manager code.
6665 AcpiEnable will now fail if all of the required ACPI tables are not
6667 (FADT, FACS, DSDT). BZ 477
6669 Added #pragma pack(8/4) to acobject.h to ensure that the structures in
6671 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
6672 manually optimized to be aligned and will not work if it is byte-packed.
6674 Example Code and Data Size: These are the sizes for the OS-independent
6675 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6676 debug version of the code includes the debug output trace mechanism and
6678 a much larger code and data size.
6681 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
6682 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
6684 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
6685 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
6688 2) iASL Compiler/Disassembler and Tools:
6690 Fixed a problem where the presence of the _OSI predefined control method
6691 within complex expressions could cause an internal compiler error.
6693 AcpiExec: Implemented full region support for multiple address spaces.
6694 SpaceId is now part of the REGION object. BZ 429
6696 ----------------------------------------
6697 11 October 2006. Summary of changes for version 20061011:
6699 1) ACPI CA Core Subsystem:
6701 Completed an AML interpreter performance enhancement for control method
6702 execution. Previously a 2-pass parse/execution, control methods are now
6703 completely parsed and executed in a single pass. This improves overall
6704 interpreter performance by ~25%, reduces code size, and reduces CPU stack
6705 use. (Valery Podrezov + interpreter changes in version 20051202 that
6706 eliminated namespace loading during the pass one parse.)
6708 Implemented _CID support for PCI Root Bridge detection. If the _HID does
6710 match the predefined PCI Root Bridge IDs, the _CID list (if present) is
6712 obtained and also checked for an ID match.
6714 Implemented additional support for the PCI _ADR execution: upsearch until
6716 device scope is found before executing _ADR. This allows PCI_Config
6717 operation regions to be declared locally within control methods
6721 Fixed a problem with a possible race condition between threads executing
6722 AcpiWalkNamespace and the AML interpreter. This condition was removed by
6723 modifying AcpiWalkNamespace to (by default) ignore all temporary
6725 entries created during any concurrent control method execution. An
6726 additional namespace race condition is known to exist between
6727 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
6730 Restructured the AML ParseLoop function, breaking it into several
6731 subfunctions in order to reduce CPU stack use and improve
6735 AcpiGetHandle: Fix for parameter validation to detect invalid
6737 of prefix handle and pathname. BZ 478
6739 Example Code and Data Size: These are the sizes for the OS-independent
6740 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6741 debug version of the code includes the debug output trace mechanism and
6743 a much larger code and data size.
6746 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
6747 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
6749 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
6750 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
6752 2) iASL Compiler/Disassembler and Tools:
6754 Ported the -g option (get local ACPI tables) to the new ACPICA Table
6756 to restore original behavior.
6758 ----------------------------------------
6759 27 September 2006. Summary of changes for version 20060927:
6761 1) ACPI CA Core Subsystem:
6763 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
6764 These functions now use a spinlock for mutual exclusion and the interrupt
6765 level indication flag is not needed.
6767 Fixed a problem with the Global Lock where the lock could appear to be
6768 obtained before it is actually obtained. The global lock semaphore was
6769 inadvertently created with one unit instead of zero units. (BZ 464)
6773 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
6775 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
6777 Example Code and Data Size: These are the sizes for the OS-independent
6778 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6779 debug version of the code includes the debug output trace mechanism and
6781 a much larger code and data size.
6784 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
6785 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
6787 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
6788 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
6791 2) iASL Compiler/Disassembler and Tools:
6793 Fixed a compilation problem with the pre-defined Resource Descriptor
6795 names where an "object does not exist" error could be incorrectly
6797 if the parent ResourceTemplate pathname places the template within a
6798 different namespace scope than the current scope. (BZ 7212)
6800 Fixed a problem where the compiler could hang after syntax errors
6802 in an ElseIf construct. (BZ 453)
6804 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
6805 operator. An incorrect output filename was produced when this parameter
6807 a null string (""). Now, the original input filename is used as the AML
6808 output filename, with an ".aml" extension.
6810 Implemented a generic batch command mode for the AcpiExec utility
6812 any AML debugger command) (Valery Podrezov).
6814 ----------------------------------------
6815 12 September 2006. Summary of changes for version 20060912:
6817 1) ACPI CA Core Subsystem:
6819 Enhanced the implementation of the "serialized mode" of the interpreter
6820 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
6821 specified, instead of creating a serialization semaphore per control
6823 the interpreter lock is simply no longer released before a blocking
6824 operation during control method execution. This effectively makes the AML
6825 Interpreter single-threaded. The overhead of a semaphore per-method is
6828 Fixed a regression where an error was no longer emitted if a control
6830 attempts to create 2 objects of the same name. This once again returns
6831 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
6833 will dynamically serialize the control method to possible prevent future
6836 Integrated a fix for a problem with PCI Express HID detection in the PCI
6837 Config Space setup procedure. (BZ 7145)
6839 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
6840 AcpiHwInitialize function - the FADT registers are now validated when the
6843 Added two new warnings during FADT verification - 1) if the FADT is
6845 than the largest known FADT version, and 2) if there is a mismatch
6848 32-bit block address and the 64-bit X counterpart (when both are non-
6851 Example Code and Data Size: These are the sizes for the OS-independent
6852 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6853 debug version of the code includes the debug output trace mechanism and
6855 a much larger code and data size.
6858 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
6859 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
6861 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
6862 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
6865 2) iASL Compiler/Disassembler and Tools:
6867 Fixed a problem with the implementation of the Switch() operator where
6869 temporary variable was declared too close to the actual Switch, instead
6871 at method level. This could cause a problem if the Switch() operator is
6872 within a while loop, causing an error on the second iteration. (BZ 460)
6874 Disassembler - fix for error emitted for unknown type for target of scope
6875 operator. Now, ignore it and continue.
6877 Disassembly of an FADT now verifies the input FADT and reports any errors
6878 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
6880 Disassembly of raw data buffers with byte initialization data now
6882 each output line with the current buffer offset.
6884 Disassembly of ASF! table now includes all variable-length data fields at
6885 the end of some of the subtables.
6887 The disassembler now emits a comment if a buffer appears to be a
6888 ResourceTemplate, but cannot be disassembled as such because the EndTag
6890 not appear at the very end of the buffer.
6892 AcpiExec - Added the "-t" command line option to enable the serialized
6894 of the AML interpreter.
6896 ----------------------------------------
6897 31 August 2006. Summary of changes for version 20060831:
6899 1) ACPI CA Core Subsystem:
6901 Miscellaneous fixes for the Table Manager:
6902 - Correctly initialize internal common FADT for all 64-bit "X" fields
6903 - Fixed a couple table mapping issues during table load
6904 - Fixed a couple alignment issues for IA64
6905 - Initialize input array to zero in AcpiInitializeTables
6906 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
6909 Change for GPE support: when a "wake" GPE is received, all wake GPEs are
6911 immediately disabled to prevent the waking GPE from firing again and to
6912 prevent other wake GPEs from interrupting the wake process.
6914 Added the AcpiGpeCount global that tracks the number of processed GPEs,
6916 be used for debugging systems with a large number of ACPI interrupts.
6918 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
6919 both the ACPICA headers and the disassembler.
6921 Example Code and Data Size: These are the sizes for the OS-independent
6922 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6923 debug version of the code includes the debug output trace mechanism and
6925 a much larger code and data size.
6928 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
6929 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
6931 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
6932 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
6935 2) iASL Compiler/Disassembler and Tools:
6937 Disassembler support for the DMAR ACPI table.
6939 ----------------------------------------
6940 23 August 2006. Summary of changes for version 20060823:
6942 1) ACPI CA Core Subsystem:
6944 The Table Manager component has been completely redesigned and
6945 reimplemented. The new design is much simpler, and reduces the overall
6947 and data size of the kernel-resident ACPICA by approximately 5%. Also, it
6949 now possible to obtain the ACPI tables very early during kernel
6950 initialization, even before dynamic memory management is initialized.
6951 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
6953 Obsolete ACPICA interfaces:
6955 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
6958 - AcpiLoadTable: Not needed.
6959 - AcpiUnloadTable: Not needed.
6961 New ACPICA interfaces:
6963 - AcpiInitializeTables: Must be called before the table manager can be
6965 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
6966 allocated memory after it becomes available.
6967 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
6971 Other ACPICA changes:
6973 - AcpiGetTableHeader returns the actual mapped table header, not a copy.
6975 AcpiOsUnmapMemory to free this mapping.
6976 - AcpiGetTable returns the actual mapped table. The mapping is managed
6977 internally and must not be deleted by the caller. Use of this interface
6978 causes no additional dynamic memory allocation.
6979 - AcpiFindRootPointer: Support for physical addressing has been
6981 it appeared to be unused.
6982 - The interface to AcpiOsMapMemory has changed to be consistent with the
6983 other allocation interfaces.
6984 - The interface to AcpiOsGetRootPointer has changed to eliminate
6987 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
6989 bit platforms. Was previously 64 bits on all platforms.
6990 - The interface to the ACPI Global Lock acquire/release macros have
6992 slightly since ACPICA no longer keeps a local copy of the FACS with a
6993 constructed pointer to the actual global lock.
6995 Porting to the new table manager:
6997 - AcpiInitializeTables: Must be called once, and can be called anytime
6998 during the OS initialization process. It allows the host to specify an
7000 of memory to be used to store the internal version of the RSDT/XSDT (root
7001 table). This allows the host to access ACPI tables before memory
7003 is initialized and running.
7004 - AcpiReallocateRootTable: Can be called after memory management is
7006 to copy the root table to a dynamically allocated array, freeing up the
7007 scratch memory specified in the call to AcpiInitializeTables.
7008 - AcpiSubsystemInitialize: This existing interface is independent of the
7009 Table Manager, and does not have to be called before the Table Manager
7011 be used, it only must be called before the rest of ACPICA can be used.
7012 - ACPI Tables: Some changes have been made to the names and structure of
7014 actbl.h and actbl1.h header files and may require changes to existing
7016 For example, bitfields have been completely removed because of their lack
7018 portability across C compilers.
7019 - Update interfaces to the Global Lock acquire/release macros if local
7020 versions are used. (see acwin.h)
7022 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
7026 Example Code and Data Size: These are the sizes for the OS-independent
7027 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7028 debug version of the code includes the debug output trace mechanism and
7030 a much larger code and data size.
7033 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
7034 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
7036 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
7037 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
7040 2) iASL Compiler/Disassembler and Tools:
7042 No changes for this release.
7044 ----------------------------------------
7045 21 July 2006. Summary of changes for version 20060721:
7047 1) ACPI CA Core Subsystem:
7049 The full source code for the ASL test suite used to validate the iASL
7050 compiler and the ACPICA core subsystem is being released with the ACPICA
7051 source for the first time. The source is contained in a separate package
7053 consists of over 1100 files that exercise all ASL/AML operators. The
7055 should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
7059 Completed a new design and implementation for support of the ACPI Global
7060 Lock. On the OS side, the global lock is now treated as a standard AML
7061 mutex. Previously, multiple OS threads could "acquire" the global lock
7062 simultaneously. However, this could cause the BIOS to be starved out of
7064 lock - especially in cases such as the Embedded Controller driver where
7065 there is a tight coupling between the OS and the BIOS.
7067 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
7068 The Global Lock interrupt handler no longer queues the execution of a
7069 separate thread to signal the global lock semaphore. Instead, the
7071 is signaled directly from the interrupt handler.
7073 Implemented support within the AML interpreter for package objects that
7074 contain a larger AML length (package list length) than the package
7076 count. In this case, the length of the package is truncated to match the
7077 package element count. Some BIOS code apparently modifies the package
7079 on the fly, and this change supports this behavior. Provides
7081 with the MS AML interpreter. (With assistance from Fiodor Suietov)
7083 Implemented a temporary fix for the BankValue parameter of a Bank Field
7085 support all constant values, now including the Zero and One opcodes.
7086 Evaluation of this parameter must eventually be converted to a full
7088 evaluation. A not-implemented error is now returned (temporarily) for
7090 constant values for this parameter.
7092 Fixed problem reports (Fiodor Suietov) integrated:
7093 - Fix for premature object deletion after CopyObject on Operation Region
7097 Example Code and Data Size: These are the sizes for the OS-independent
7098 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7099 debug version of the code includes the debug output trace mechanism and
7101 a much larger code and data size.
7104 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
7105 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
7107 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
7108 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
7111 2) iASL Compiler/Disassembler and Tools:
7113 No changes for this release.
7115 ----------------------------------------
7116 07 July 2006. Summary of changes for version 20060707:
7118 1) ACPI CA Core Subsystem:
7120 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
7121 that do not allow the initialization of address pointers within packed
7122 structures - even though the hardware itself may support misaligned
7123 transfers. Some of the debug data structures are packed by default to
7126 Added an error message for the case where AcpiOsGetThreadId() returns
7128 A non-zero value is required by the core ACPICA code to ensure the proper
7129 operation of AML mutexes and recursive control methods.
7131 The DSDT is now the only ACPI table that determines whether the AML
7132 interpreter is in 32-bit or 64-bit mode. Not really a functional change,
7134 the hooks for per-table 32/64 switching have been removed from the code.
7136 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
7138 Fixed a possible leak of an OwnerID in the error path of
7139 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
7140 deletion to a single place in AcpiTbUninstallTable to correct possible
7142 when using the AcpiTbDeleteTablesByType interface (with assistance from
7145 Fixed a problem with Serialized control methods where the semaphore
7146 associated with the method could be over-signaled after multiple method
7149 Fixed two issues with the locking of the internal namespace data
7151 Both the Unload() operator and AcpiUnloadTable interface now lock the
7152 namespace during the namespace deletion associated with the table unload
7153 (with assistance from Linn Crosetto.)
7155 Fixed problem reports (Valery Podrezov) integrated:
7156 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
7158 Fixed problem reports (Fiodor Suietov) integrated:
7159 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
7160 - On Address Space handler deletion, needless deactivation call (BZ 374)
7161 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
7163 - Possible memory leak, Notify sub-objects of Processor, Power,
7166 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
7167 - Minimum Length of RSDT should be validated (BZ 379)
7168 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
7170 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
7174 Example Code and Data Size: These are the sizes for the OS-independent
7175 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7176 debug version of the code includes the debug output trace mechanism and
7178 a much larger code and data size.
7181 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
7182 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
7184 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
7185 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
7188 2) iASL Compiler/Disassembler and Tools:
7190 Fixed problem reports:
7191 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
7194 ----------------------------------------
7195 23 June 2006. Summary of changes for version 20060623:
7197 1) ACPI CA Core Subsystem:
7199 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
7200 allows the type to be customized to the host OS for improved efficiency
7201 (since a spinlock is usually a very small object.)
7203 Implemented support for "ignored" bits in the ACPI registers. According
7205 the ACPI specification, these bits should be preserved when writing the
7206 registers via a read/modify/write cycle. There are 3 bits preserved in
7208 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
7210 Implemented the initial deployment of new OSL mutex interfaces. Since
7212 host operating systems have separate mutex and semaphore objects, this
7213 feature was requested. The base code now uses mutexes (and the new mutex
7214 interfaces) wherever a binary semaphore was used previously. However, for
7215 the current release, the mutex interfaces are defined as macros to map
7217 to the existing semaphore interfaces. Therefore, no OSL changes are
7219 at this time. (See acpiosxf.h)
7221 Fixed several problems with the support for the control method SyncLevel
7222 parameter. The SyncLevel now works according to the ACPI specification
7224 in concert with the Mutex SyncLevel parameter, since the current
7226 is a property of the executing thread. Mutual exclusion for control
7228 is now implemented with a mutex instead of a semaphore.
7230 Fixed three instances of the use of the C shift operator in the bitfield
7231 support code (exfldio.c) to avoid the use of a shift value larger than
7233 target data width. The behavior of C compilers is undefined in this case
7235 can cause unpredictable results, and therefore the case must be detected
7237 avoided. (Fiodor Suietov)
7239 Added an info message whenever an SSDT or OEM table is loaded dynamically
7240 via the Load() or LoadTable() ASL operators. This should improve
7242 capability since it will show exactly what tables have been loaded
7244 the tables present in the RSDT/XSDT.)
7246 Example Code and Data Size: These are the sizes for the OS-independent
7247 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7248 debug version of the code includes the debug output trace mechanism and
7250 a much larger code and data size.
7253 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
7254 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
7256 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
7257 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
7260 2) iASL Compiler/Disassembler and Tools:
7262 No changes for this release.
7264 ----------------------------------------
7265 08 June 2006. Summary of changes for version 20060608:
7267 1) ACPI CA Core Subsystem:
7269 Converted the locking mutex used for the ACPI hardware to a spinlock.
7271 change should eliminate all problems caused by attempting to acquire a
7272 semaphore at interrupt level, and it means that all ACPICA external
7273 interfaces that directly access the ACPI hardware can be safely called
7275 interrupt level. OSL code that implements the semaphore interfaces should
7277 able to eliminate any workarounds for being called at interrupt level.
7279 Fixed a regression introduced in 20060526 where the ACPI device
7280 initialization could be prematurely aborted with an AE_NOT_FOUND if a
7282 did not have an optional _INI method.
7284 Fixed an IndexField issue where a write to the Data Register should be
7285 limited in size to the AccessSize (width) of the IndexField itself. (BZ
7289 Fixed problem reports (Valery Podrezov) integrated:
7290 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
7292 Fixed problem reports (Fiodor Suietov) integrated:
7293 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
7295 Removed four global mutexes that were obsolete and were no longer being
7298 Example Code and Data Size: These are the sizes for the OS-independent
7299 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7300 debug version of the code includes the debug output trace mechanism and
7302 a much larger code and data size.
7305 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
7306 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
7308 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
7309 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
7312 2) iASL Compiler/Disassembler and Tools:
7314 Fixed a fault when using -g option (get tables from registry) on Windows
7317 Fixed problem reports integrated:
7318 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
7319 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
7321 - Global table revision override (-r) is ignored (BZ 413)
7323 ----------------------------------------
7324 26 May 2006. Summary of changes for version 20060526:
7326 1) ACPI CA Core Subsystem:
7328 Restructured, flattened, and simplified the internal interfaces for
7329 namespace object evaluation - resulting in smaller code, less CPU stack
7331 and fewer interfaces. (With assistance from Mikhail Kouzmich)
7333 Fixed a problem with the CopyObject operator where the first parameter
7335 not typed correctly for the parser, interpreter, compiler, and
7337 Caused various errors and unexpected behavior.
7339 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
7340 produced incorrect results with some C compilers. Since the behavior of C
7341 compilers when the shift value is larger than the datatype width is
7342 apparently not well defined, the interpreter now detects this condition
7344 simply returns zero as expected in all such cases. (BZ 395)
7346 Fixed problem reports (Valery Podrezov) integrated:
7347 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
7348 - Allow interpreter to handle nested method declarations (BZ 5361)
7350 Fixed problem reports (Fiodor Suietov) integrated:
7351 - AcpiTerminate doesn't free debug memory allocation list objects (BZ
7353 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
7355 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
7356 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
7357 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
7358 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
7359 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
7360 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
7361 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
7363 - Status of the Global Initialization Handler call not used (BZ 366)
7364 - Incorrect object parameter to Global Initialization Handler (BZ 367)
7366 Example Code and Data Size: These are the sizes for the OS-independent
7367 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7368 debug version of the code includes the debug output trace mechanism and
7370 a much larger code and data size.
7373 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
7374 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
7376 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
7377 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
7380 2) iASL Compiler/Disassembler and Tools:
7382 Modified the parser to allow the names IO, DMA, and IRQ to be used as
7383 namespace identifiers with no collision with existing resource descriptor
7384 macro names. This provides compatibility with other ASL compilers and is
7385 most useful for disassembly/recompilation of existing tables without
7387 errors. (With assistance from Thomas Renninger)
7389 Disassembler: fixed an incorrect disassembly problem with the
7390 DataTableRegion and CopyObject operators. Fixed a possible fault during
7391 disassembly of some Alias operators.
7393 ----------------------------------------
7394 12 May 2006. Summary of changes for version 20060512:
7396 1) ACPI CA Core Subsystem:
7398 Replaced the AcpiOsQueueForExecution interface with a new interface named
7399 AcpiOsExecute. The major difference is that the new interface does not
7401 a Priority parameter, this appeared to be useless and has been replaced
7404 Type parameter. The Type tells the host what type of execution is being
7405 requested, such as global lock handler, notify handler, GPE handler, etc.
7406 This allows the host to queue and execute the request as appropriate for
7408 request type, possibly using different work queues and different
7410 for the various request types. This enables fixes for multithreading
7411 deadlock problems such as BZ #5534, and will require changes to all
7413 OS interface layers. (Alexey Starikovskiy and Bob Moore)
7415 Fixed a possible memory leak associated with the support for the so-
7417 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
7420 Fixed a problem with the Load() operator where a table load from an
7421 operation region could overwrite an internal table buffer by up to 7
7423 and cause alignment faults on IPF systems. (With assistance from Luming
7426 Example Code and Data Size: These are the sizes for the OS-independent
7427 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7428 debug version of the code includes the debug output trace mechanism and
7430 a much larger code and data size.
7433 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
7434 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
7436 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
7437 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
7441 2) iASL Compiler/Disassembler and Tools:
7443 Disassembler: Implemented support to cross reference the internal
7445 and automatically generate ASL External() statements for symbols not
7447 within the current table being disassembled. This will simplify the
7448 disassembly and recompilation of interdependent tables such as SSDTs
7450 these statements will no longer have to be added manually.
7452 Disassembler: Implemented experimental support to automatically detect
7453 invocations of external control methods and generate appropriate
7455 statements. This is problematic because the AML cannot be correctly
7457 until the number of arguments for each control method is known.
7459 standalone method invocations and invocations as the source operand of a
7460 Store() statement are supported.
7462 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
7463 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
7464 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
7465 more readable and likely closer to the original ASL source.
7467 ----------------------------------------
7468 21 April 2006. Summary of changes for version 20060421:
7470 1) ACPI CA Core Subsystem:
7472 Removed a device initialization optimization introduced in 20051216 where
7473 the _STA method was not run unless an _INI was also present for the same
7474 device. This optimization could cause problems because it could allow
7476 methods to be run within a not-present device subtree. (If a not-present
7477 device had no _INI, _STA would not be run, the not-present status would
7479 be discovered, and the children of the device would be incorrectly
7482 Implemented a new _STA optimization where namespace subtrees that do not
7483 contain _INI are identified and ignored during device initialization.
7484 Selectively running _STA can significantly improve boot time on large
7485 machines (with assistance from Len Brown.)
7487 Implemented support for the device initialization case where the returned
7488 _STA flags indicate a device not-present but functioning. In this case,
7490 is not run, but the device children are examined for presence, as per the
7493 Implemented an additional change to the IndexField support in order to
7494 conform to MS behavior. The value written to the Index Register is not
7495 simply a byte offset, it is a byte offset in units of the access width of
7496 the parent Index Field. (Fiodor Suietov)
7498 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
7499 interface is called during the creation of all AML operation regions, and
7500 allows the host OS to exert control over what addresses it will allow the
7501 AML code to access. Operation Regions whose addresses are disallowed will
7502 cause a runtime exception when they are actually accessed (will not
7504 or abort table loading.) See oswinxf or osunixxf for an example
7507 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
7508 interface allows the host OS to match the various "optional"
7509 interface/behavior strings for the _OSI predefined control method as
7510 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
7511 for an example implementation.
7513 Restructured and corrected various problems in the exception handling
7515 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
7516 (with assistance from Takayoshi Kochi.)
7518 Modified the Linux source converter to ignore quoted string literals
7520 converting identifiers from mixed to lower case. This will correct
7522 with the disassembler and other areas where such strings must not be
7525 The ACPI_FUNCTION_* macros no longer require quotes around the function
7526 name. This allows the Linux source converter to convert the names, now
7528 the converter ignores quoted strings.
7530 Example Code and Data Size: These are the sizes for the OS-independent
7531 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7532 debug version of the code includes the debug output trace mechanism and
7534 a much larger code and data size.
7538 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
7539 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
7541 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
7542 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
7545 2) iASL Compiler/Disassembler and Tools:
7547 Implemented 3 new warnings for iASL, and implemented multiple warning
7551 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
7553 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
7554 check for the possible timeout, a warning is issued.
7556 2) Useless operators: If an ASL operator does not specify an optional
7558 operand and it also does not use the function return value from the
7559 operator, a warning is issued since the operator effectively does
7562 3) Unreferenced objects: If a namespace object is created, but never
7563 referenced, a warning is issued. This is a warning level 2 since there
7565 cases where this is ok, such as when a secondary table is loaded that
7567 the unreferenced objects. Even so, care is taken to only flag objects
7569 don't look like they will ever be used. For example, the reserved methods
7570 (starting with an underscore) are usually not referenced because it is
7571 expected that the OS will invoke them.
7573 ----------------------------------------
7574 31 March 2006. Summary of changes for version 20060331:
7576 1) ACPI CA Core Subsystem:
7578 Implemented header file support for the following additional ACPI tables:
7579 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
7581 all current and known ACPI tables are now defined in the ACPICA headers
7583 are available for use by device drivers and other software.
7585 Implemented support to allow tables that contain ACPI names with invalid
7586 characters to be loaded. Previously, this would cause the table load to
7587 fail, but since there are several known cases of such tables on existing
7588 machines, this change was made to enable ACPI support for them. Also,
7590 matches the behavior of the Microsoft ACPI implementation.
7592 Fixed a couple regressions introduced during the memory optimization in
7594 20060317 release. The namespace node definition required additional
7595 reorganization and an internal datatype that had been changed to 8-bit
7597 restored to 32-bit. (Valery Podrezov)
7599 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
7600 could be passed through to AcpiOsReleaseObject which is unexpected. Such
7601 null pointers are now trapped and ignored, matching the behavior of the
7602 previous implementation before the deployment of AcpiOsReleaseObject.
7603 (Valery Podrezov, Fiodor Suietov)
7605 Fixed a memory mapping leak during the deletion of a SystemMemory
7607 region where a cached memory mapping was not deleted. This became a
7608 noticeable problem for operation regions that are defined within
7610 used control methods. (Dana Meyers)
7612 Reorganized the ACPI table header files into two main files: one for the
7613 ACPI tables consumed by the ACPICA core, and another for the
7615 ACPI tables that are consumed by the drivers and other software. The
7617 FADT definitions were merged into one common section and three different
7618 tables (ACPI 1.0, 1.0+, and 2.0)
7620 Example Code and Data Size: These are the sizes for the OS-independent
7621 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7622 debug version of the code includes the debug output trace mechanism and
7624 a much larger code and data size.
7627 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
7628 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
7630 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
7631 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
7634 2) iASL Compiler/Disassembler and Tools:
7636 Disassembler: Implemented support to decode and format all non-AML ACPI
7637 tables (tables other than DSDTs and SSDTs.) This includes the new tables
7638 added to the ACPICA headers, therefore all current and known ACPI tables
7642 Disassembler: The change to allow ACPI names with invalid characters also
7643 enables the disassembly of such tables. Invalid characters within names
7645 changed to '*' to make the name printable; the iASL compiler will still
7646 generate an error for such names, however, since this is an invalid ACPI
7649 Implemented an option for AcpiXtract (-a) to extract all tables found in
7651 input file. The default invocation extracts only the DSDTs and SSDTs.
7653 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
7654 makefile for the AcpiXtract utility.
7656 ----------------------------------------
7657 17 March 2006. Summary of changes for version 20060317:
7659 1) ACPI CA Core Subsystem:
7661 Implemented the use of a cache object for all internal namespace nodes.
7662 Since there are about 1000 static nodes in a typical system, this will
7663 decrease memory use for cache implementations that minimize per-
7665 overhead (such as a slab allocator.)
7667 Removed the reference count mechanism for internal namespace nodes, since
7669 was deemed unnecessary. This reduces the size of each namespace node by
7670 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
7672 and 32 bytes for the 64-bit case.
7674 Optimized several internal data structures to reduce object size on 64-
7676 platforms by packing data within the 64-bit alignment. This includes the
7677 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
7678 instances corresponding to the namespace objects.
7680 Added two new strings for the predefined _OSI method: "Windows 2001.1
7684 Split the allocation tracking mechanism out to a separate file, from
7685 utalloc.c to uttrack.c. This mechanism appears to be only useful for
7686 application-level code. Kernels may wish to not include uttrack.c in
7689 Removed all remnants of the obsolete ACPI_REPORT_* macros and the
7691 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
7694 Code and Data Size: These are the sizes for the acpica.lib produced by
7696 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
7698 driver or OSPM code. The debug version of the code includes the debug
7700 trace mechanism and has a much larger code and data size. Note that these
7701 values will vary depending on the efficiency of the compiler and the
7702 compiler options used during generation.
7705 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
7706 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
7708 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
7709 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
7712 2) iASL Compiler/Disassembler and Tools:
7714 Implemented an ANSI C version of the acpixtract utility. This version
7716 automatically extract the DSDT and all SSDTs from the input acpidump text
7717 file and dump the binary output to separate files. It can also display a
7718 summary of the input file including the headers for each table found and
7719 will extract any single ACPI table, with any signature. (See
7720 source/tools/acpixtract)
7722 ----------------------------------------
7723 10 March 2006. Summary of changes for version 20060310:
7725 1) ACPI CA Core Subsystem:
7727 Tagged all external interfaces to the subsystem with the new
7728 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
7730 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
7731 macro. The default definition is NULL.
7733 Added the ACPI_THREAD_ID type for the return value from
7735 This allows the host to define this as necessary to simplify kernel
7736 integration. The default definition is ACPI_NATIVE_UINT.
7738 Fixed two interpreter problems related to error processing, the deletion
7740 objects, and placing invalid pointers onto the internal operator result
7741 stack. BZ 6028, 6151 (Valery Podrezov)
7743 Increased the reference count threshold where a warning is emitted for
7745 reference counts in order to eliminate unnecessary warnings on systems
7747 large namespaces (especially 64-bit.) Increased the value from 0x400 to
7750 Due to universal disagreement as to the meaning of the 'c' in the
7752 function, the ACPI_MEM_CALLOCATE macro has been renamed to
7753 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
7754 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
7757 Code and Data Size: These are the sizes for the acpica.lib produced by
7759 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
7761 driver or OSPM code. The debug version of the code includes the debug
7763 trace mechanism and has a much larger code and data size. Note that these
7764 values will vary depending on the efficiency of the compiler and the
7765 compiler options used during generation.
7768 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
7769 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
7771 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
7772 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
7775 2) iASL Compiler/Disassembler:
7777 Disassembler: implemented support for symbolic resource descriptor
7778 references. If a CreateXxxxField operator references a fixed offset
7781 resource descriptor, a name is assigned to the descriptor and the offset
7783 translated to the appropriate resource tag and pathname. The addition of
7784 this support brings the disassembled code very close to the original ASL
7785 source code and helps eliminate run-time errors when the disassembled
7787 is modified (and recompiled) in such a way as to invalidate the original
7790 Implemented support for a Descriptor Name as the last parameter to the
7792 Register() macro. This parameter was inadvertently left out of the ACPI
7793 specification, and will be added for ACPI 3.0b.
7795 Fixed a problem where the use of the "_OSI" string (versus the full path
7796 "\_OSI") caused an internal compiler error. ("No back ptr to op")
7798 Fixed a problem with the error message that occurs when an invalid string
7800 used for a _HID object (such as one with an embedded asterisk:
7802 The correct message is now displayed.
7804 ----------------------------------------
7805 17 February 2006. Summary of changes for version 20060217:
7807 1) ACPI CA Core Subsystem:
7809 Implemented a change to the IndexField support to match the behavior of
7811 Microsoft AML interpreter. The value written to the Index register is now
7813 byte offset, no longer an index based upon the width of the Data
7815 This should fix IndexField problems seen on some machines where the Data
7816 register is not exactly one byte wide. The ACPI specification will be
7817 clarified on this point.
7819 Fixed a problem where several resource descriptor types could overrun the
7820 internal descriptor buffer due to size miscalculation: VendorShort,
7821 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
7822 affect all platforms.
7824 Fixed a problem where individual resource descriptors were misaligned
7826 the internal buffer, causing alignment faults on IA64 platforms.
7828 Code and Data Size: These are the sizes for the acpica.lib produced by
7830 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
7832 driver or OSPM code. The debug version of the code includes the debug
7834 trace mechanism and has a much larger code and data size. Note that these
7835 values will vary depending on the efficiency of the compiler and the
7836 compiler options used during generation.
7839 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
7840 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
7842 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
7843 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
7846 2) iASL Compiler/Disassembler:
7848 Implemented support for new reserved names: _WDG and _WED are Microsoft
7849 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
7850 defined method (Throttling Depth Limit.)
7852 Fixed a problem where a zero-length VendorShort or VendorLong resource
7853 descriptor was incorrectly emitted as a descriptor of length one.
7855 ----------------------------------------
7856 10 February 2006. Summary of changes for version 20060210:
7858 1) ACPI CA Core Subsystem:
7860 Removed a couple of extraneous ACPI_ERROR messages that appeared during
7861 normal execution. These became apparent after the conversion from
7864 Fixed a problem where the CreateField operator could hang if the BitIndex
7866 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
7868 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
7869 failed with an exception. This also fixes a couple of related RefOf and
7870 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
7872 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
7874 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
7878 Implemented a memory cleanup at the end of the execution of each
7880 of an AML While() loop, preventing the accumulation of outstanding
7882 (Valery Podrezov, BZ 5427)
7884 Eliminated a chunk of duplicate code in the object resolution code.
7888 Fixed several warnings during the 64-bit code generation.
7890 The AcpiSrc source code conversion tool now inserts one line of
7892 after an if() statement that is followed immediately by a comment,
7894 readability of the Linux code.
7896 Code and Data Size: The current and previous library sizes for the core
7897 subsystem are shown below. These are the code and data sizes for the
7898 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
7900 values do not include any ACPI driver or OSPM code. The debug version of
7902 code includes the debug output trace mechanism and has a much larger code
7903 and data size. Note that these values will vary depending on the
7905 of the compiler and the compiler options used during generation.
7908 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
7909 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
7911 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
7912 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
7915 2) iASL Compiler/Disassembler:
7917 Fixed a problem with the disassembly of a BankField operator with a
7919 expression for the BankValue parameter.
7921 ----------------------------------------
7922 27 January 2006. Summary of changes for version 20060127:
7924 1) ACPI CA Core Subsystem:
7926 Implemented support in the Resource Manager to allow unresolved
7928 references within resource package objects for the _PRT method. This
7930 is in addition to the previously implemented unresolved reference support
7931 within the AML parser. If the interpreter slack mode is enabled, these
7932 unresolved references will be passed through to the caller as a NULL
7936 Implemented and deployed new macros and functions for error and warning
7937 messages across the subsystem. These macros are simpler and generate less
7938 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
7939 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
7940 macros remain defined to allow ACPI drivers time to migrate to the new
7943 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
7945 Acquire/Release Lock OSL interfaces.
7947 Fixed a problem where Alias ASL operators are sometimes not correctly
7948 resolved, in both the interpreter and the iASL compiler.
7950 Fixed several problems with the implementation of the
7951 ConcatenateResTemplate
7952 ASL operator. As per the ACPI specification, zero length buffers are now
7953 treated as a single EndTag. One-length buffers always cause a fatal
7954 exception. Non-zero length buffers that do not end with a full 2-byte
7956 cause a fatal exception.
7958 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
7959 interface. (With assistance from Thomas Renninger)
7961 Code and Data Size: The current and previous library sizes for the core
7962 subsystem are shown below. These are the code and data sizes for the
7963 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
7965 values do not include any ACPI driver or OSPM code. The debug version of
7967 code includes the debug output trace mechanism and has a much larger code
7968 and data size. Note that these values will vary depending on the
7970 of the compiler and the compiler options used during generation.
7973 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
7974 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
7976 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
7977 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
7980 2) iASL Compiler/Disassembler:
7982 Fixed an internal error that was generated for any forward references to
7986 ----------------------------------------
7987 13 January 2006. Summary of changes for version 20060113:
7989 1) ACPI CA Core Subsystem:
7991 Added 2006 copyright to all module headers and signons. This affects
7992 virtually every file in the ACPICA core subsystem, iASL compiler, and the
7995 Enhanced the ACPICA error reporting in order to simplify user migration
7997 the non-debug version of ACPICA. Replaced all instances of the
7998 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
8000 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
8001 respectively. This preserves all error and warning messages in the non-
8003 version of the ACPICA code (this has been referred to as the "debug lite"
8004 option.) Over 200 cases were converted to create a total of over 380
8005 error/warning messages across the ACPICA code. This increases the code
8007 data size of the default non-debug version of the code somewhat (about
8009 but all error/warning reporting may be disabled if desired (and code
8010 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
8011 configuration option. The size of the debug version of ACPICA remains
8015 Fixed a memory leak within the AML Debugger "Set" command. One object was
8016 not properly deleted for every successful invocation of the command.
8018 Code and Data Size: The current and previous library sizes for the core
8019 subsystem are shown below. These are the code and data sizes for the
8020 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
8022 values do not include any ACPI driver or OSPM code. The debug version of
8024 code includes the debug output trace mechanism and has a much larger code
8025 and data size. Note that these values will vary depending on the
8027 of the compiler and the compiler options used during generation.
8030 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
8031 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
8033 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
8034 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
8037 2) iASL Compiler/Disassembler:
8039 The compiler now officially supports the ACPI 3.0a specification that was
8040 released on December 30, 2005. (Specification is available at
8043 ----------------------------------------
8044 16 December 2005. Summary of changes for version 20051216:
8046 1) ACPI CA Core Subsystem:
8048 Implemented optional support to allow unresolved names within ASL Package
8049 objects. A null object is inserted in the package when a named reference
8050 cannot be located in the current namespace. Enabled via the interpreter
8051 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
8053 that contain such code.
8055 Implemented an optimization to the initialization sequence that can
8057 boot time. During ACPI device initialization, the _STA method is now run
8059 and only if the _INI method exists. The _STA method is used to determine
8061 the device is present; An _INI can only be run if _STA returns present,
8063 it is a waste of time to run the _STA method if the _INI does not exist.
8064 (Prototype and assistance from Dong Wei)
8066 Implemented use of the C99 uintptr_t for the pointer casting macros if it
8068 available in the current compiler. Otherwise, the default (void *) cast
8072 Fixed some possible memory leaks found within the execution path of the
8073 Break, Continue, If, and CreateField operators. (Valery Podrezov)
8075 Fixed a problem introduced in the 20051202 release where an exception is
8076 generated during method execution if a control method attempts to declare
8079 Moved resource descriptor string constants that are used by both the AML
8080 disassembler and AML debugger to the common utilities directory so that
8081 these components are independent.
8083 Implemented support in the AcpiExec utility (-e switch) to globally
8085 exceptions during control method execution (method is not aborted.)
8087 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
8090 Code and Data Size: The current and previous library sizes for the core
8091 subsystem are shown below. These are the code and data sizes for the
8092 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
8094 values do not include any ACPI driver or OSPM code. The debug version of
8096 code includes the debug output trace mechanism and has a much larger code
8097 and data size. Note that these values will vary depending on the
8099 of the compiler and the compiler options used during generation.
8102 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
8103 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
8105 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
8106 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
8109 2) iASL Compiler/Disassembler:
8111 Fixed a problem where a CPU stack overflow fault could occur if a
8113 method call was made from within a Return statement.
8115 ----------------------------------------
8116 02 December 2005. Summary of changes for version 20051202:
8118 1) ACPI CA Core Subsystem:
8120 Modified the parsing of control methods to no longer create namespace
8121 objects during the first pass of the parse. Objects are now created only
8122 during the execute phase, at the moment the namespace creation operator
8124 encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
8126 should eliminate ALREADY_EXISTS exceptions seen on some machines where
8127 reentrant control methods are protected by an AML mutex. The mutex will
8129 correctly block multiple threads from attempting to create the same
8133 Increased the number of available Owner Ids for namespace object tracking
8134 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
8136 some machines with a large number of ACPI tables (either static or
8139 Fixed a problem with the AcpiExec utility where a fault could occur when
8141 -b switch (batch mode) is used.
8143 Enhanced the namespace dump routine to output the owner ID for each
8146 Code and Data Size: The current and previous library sizes for the core
8147 subsystem are shown below. These are the code and data sizes for the
8148 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
8150 values do not include any ACPI driver or OSPM code. The debug version of
8152 code includes the debug output trace mechanism and has a much larger code
8153 and data size. Note that these values will vary depending on the
8155 of the compiler and the compiler options used during generation.
8158 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
8159 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
8161 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
8162 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
8165 2) iASL Compiler/Disassembler:
8167 Fixed a parse error during compilation of certain Switch/Case constructs.
8169 simplify the parse, the grammar now allows for multiple Default
8171 and this error is now detected and flagged during the analysis phase.
8173 Disassembler: The disassembly now includes the contents of the original
8174 table header within a comment at the start of the file. This includes the
8175 name and version of the original ASL compiler.
8177 ----------------------------------------
8178 17 November 2005. Summary of changes for version 20051117:
8180 1) ACPI CA Core Subsystem:
8182 Fixed a problem in the AML parser where the method thread count could be
8183 decremented below zero if any errors occurred during the method parse
8185 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
8187 This also fixed a related regression with the mechanism that detects and
8188 corrects methods that cannot properly handle reentrancy (related to the
8189 deployment of the new OwnerId mechanism.)
8191 Eliminated the pre-parsing of control methods (to detect errors) during
8192 table load. Related to the problem above, this was causing unwind issues
8194 any errors occurred during the parse, and it seemed to be overkill. A
8196 load should not be aborted if there are problems with any single control
8197 method, thus rendering this feature rather pointless.
8199 Fixed a problem with the new table-driven resource manager where an
8201 buffer overflow could occur for small resource templates.
8203 Implemented a new external interface, AcpiGetVendorResource. This
8205 will find and return a vendor-defined resource descriptor within a _CRS
8207 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
8210 Removed the length limit (200) on string objects as per the upcoming ACPI
8211 3.0A specification. This affects the following areas of the interpreter:
8213 any implicit conversion of a Buffer to a String, 2) a String object
8215 of the ASL Concatentate operator, 3) the String object result of the ASL
8218 Fixed a problem in the Windows OS interface layer (OSL) where a
8220 on a semaphore object would incorrectly timeout. This allows the
8221 multithreading features of the AcpiExec utility to work properly under
8224 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
8225 the recently added file named "utresrc.c".
8227 Code and Data Size: The current and previous library sizes for the core
8228 subsystem are shown below. These are the code and data sizes for the
8229 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
8231 values do not include any ACPI driver or OSPM code. The debug version of
8233 code includes the debug output trace mechanism and has a much larger code
8234 and data size. Note that these values will vary depending on the
8236 of the compiler and the compiler options used during generation.
8239 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
8240 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
8242 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
8243 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
8246 2) iASL Compiler/Disassembler:
8248 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
8249 specification. For the iASL compiler, this means that string literals
8251 the source ASL can be of any length.
8253 Enhanced the listing output to dump the AML code for resource descriptors
8254 immediately after the ASL code for each descriptor, instead of in a block
8256 the end of the entire resource template.
8258 Enhanced the compiler debug output to dump the entire original parse tree
8259 constructed during the parse phase, before any transforms are applied to
8261 tree. The transformed tree is dumped also.
8263 ----------------------------------------
8264 02 November 2005. Summary of changes for version 20051102:
8266 1) ACPI CA Core Subsystem:
8268 Modified the subsystem initialization sequence to improve GPE support.
8270 GPE initialization has been split into two parts in order to defer
8272 of the _PRW methods (Power Resources for Wake) until after the hardware
8274 fully initialized and the SCI handler is installed. This allows the _PRW
8275 methods to access fields protected by the Global Lock. This will fix
8277 where a NO_GLOBAL_LOCK exception has been seen during initialization.
8279 Converted the ACPI internal object disassemble and display code within
8281 AML debugger to fully table-driven operation, reducing code size and
8282 increasing maintainability.
8284 Fixed a regression with the ConcatenateResTemplate() ASL operator
8286 in the 20051021 release.
8288 Implemented support for "local" internal ACPI object types within the
8289 debugger "Object" command and the AcpiWalkNamespace external interfaces.
8290 These local types include RegionFields, BankFields, IndexFields, Alias,
8294 Moved common AML resource handling code into a new file, "utresrc.c".
8296 code is shared by both the Resource Manager and the AML Debugger.
8298 Code and Data Size: The current and previous library sizes for the core
8299 subsystem are shown below. These are the code and data sizes for the
8300 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
8302 values do not include any ACPI driver or OSPM code. The debug version of
8304 code includes the debug output trace mechanism and has a much larger code
8305 and data size. Note that these values will vary depending on the
8307 of the compiler and the compiler options used during generation.
8310 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
8311 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
8313 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
8314 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
8317 2) iASL Compiler/Disassembler:
8319 Fixed a problem with very large initializer lists (more than 4000
8321 for both Buffer and Package objects where the parse stack could overflow.
8323 Enhanced the pre-compile source code scan for non-ASCII characters to
8325 characters within comment fields. The scan is now always performed and is
8327 longer optional, detecting invalid characters within a source file
8328 immediately rather than during the parse phase or later.
8330 Enhanced the ASL grammar definition to force early reductions on all
8332 style grammar elements so that the overall parse stack usage is greatly
8333 reduced. This should improve performance and reduce the possibility of
8337 Eliminated all reduce/reduce conflicts in the iASL parser generation.
8339 with the addition of a %expected statement, the compiler generates from
8340 source with no warnings.
8342 Fixed a possible segment fault in the disassembler if the input filename
8343 does not contain a "dot" extension (Thomas Renninger).
8345 ----------------------------------------
8346 21 October 2005. Summary of changes for version 20051021:
8348 1) ACPI CA Core Subsystem:
8350 Implemented support for the EM64T and other x86-64 processors. This
8351 essentially entails recognizing that these processors support non-aligned
8352 memory transfers. Previously, all 64-bit processors were assumed to lack
8353 hardware support for non-aligned transfers.
8355 Completed conversion of the Resource Manager to nearly full table-driven
8356 operation. Specifically, the resource conversion code (convert AML to
8357 internal format and the reverse) and the debug code to dump internal
8358 resource descriptors are fully table-driven, reducing code and data size
8360 improving maintainability.
8362 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
8364 on 64-bit processors instead of a fixed 32-bit word. (With assistance
8366 Alexey Starikovskiy)
8368 Implemented support within the resource conversion code for the Type-
8369 Specific byte within the various ACPI 3.0 *WordSpace macros.
8371 Fixed some issues within the resource conversion code for the type-
8373 flags for both Memory and I/O address resource descriptors. For Memory,
8374 implemented support for the MTP and TTP flags. For I/O, split the TRS and
8375 TTP flags into two separate fields.
8377 Code and Data Size: The current and previous library sizes for the core
8378 subsystem are shown below. These are the code and data sizes for the
8379 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
8381 values do not include any ACPI driver or OSPM code. The debug version of
8383 code includes the debug output trace mechanism and has a much larger code
8384 and data size. Note that these values will vary depending on the
8386 of the compiler and the compiler options used during generation.
8389 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
8390 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
8392 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
8393 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
8397 2) iASL Compiler/Disassembler:
8399 Relaxed a compiler restriction that disallowed a ResourceIndex byte if
8401 corresponding ResourceSource string was not also present in a resource
8402 descriptor declaration. This restriction caused problems with existing
8403 AML/ASL code that includes the Index byte without the string. When such
8405 was disassembled, it could not be compiled without modification. Further,
8406 the modified code created a resource template with a different size than
8408 original, breaking code that used fixed offsets into the resource
8412 Removed a recent feature of the disassembler to ignore a lone
8414 byte. This byte is now emitted if present so that the exact AML can be
8415 reproduced when the disassembled code is recompiled.
8417 Improved comments and text alignment for the resource descriptor code
8418 emitted by the disassembler.
8420 Implemented disassembler support for the ACPI 3.0 AccessSize field within
8422 Register() resource descriptor.
8424 ----------------------------------------
8425 30 September 2005. Summary of changes for version 20050930:
8427 1) ACPI CA Core Subsystem:
8429 Completed a major overhaul of the Resource Manager code - specifically,
8430 optimizations in the area of the AML/internal resource conversion code.
8432 code has been optimized to simplify and eliminate duplicated code, CPU
8434 use has been decreased by optimizing function parameters and local
8435 variables, and naming conventions across the manager have been
8437 for clarity and ease of maintenance (this includes function, parameter,
8438 variable, and struct/typedef names.) The update may force changes in some
8439 driver code, depending on how resources are handled by the host OS.
8441 All Resource Manager dispatch and information tables have been moved to a
8442 single location for clarity and ease of maintenance. One new file was
8443 created, named "rsinfo.c".
8445 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
8446 guarantee that the argument is not evaluated twice, making them less
8448 to macro side-effects. However, since there exists the possibility of
8449 additional stack use if a particular compiler cannot optimize them (such
8451 in the debug generation case), the original macros are optionally
8453 Note that some invocations of the return_VALUE macro may now cause size
8454 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
8456 eliminate these. (From Randy Dunlap)
8458 Implemented a new mechanism to enable debug tracing for individual
8460 methods. A new external interface, AcpiDebugTrace, is provided to enable
8461 this mechanism. The intent is to allow the host OS to easily enable and
8462 disable tracing for problematic control methods. This interface can be
8463 easily exposed to a user or debugger interface if desired. See the file
8464 psxface.c for details.
8466 AcpiUtCallocate will now return a valid pointer if a length of zero is
8467 specified - a length of one is used and a warning is issued. This matches
8468 the behavior of AcpiUtAllocate.
8470 Code and Data Size: The current and previous library sizes for the core
8471 subsystem are shown below. These are the code and data sizes for the
8472 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
8474 values do not include any ACPI driver or OSPM code. The debug version of
8476 code includes the debug output trace mechanism and has a much larger code
8477 and data size. Note that these values will vary depending on the
8479 of the compiler and the compiler options used during generation.
8482 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
8483 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
8485 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
8486 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
8489 2) iASL Compiler/Disassembler:
8491 A remark is issued if the effective compile-time length of a package or
8492 buffer is zero. Previously, this was a warning.
8494 ----------------------------------------
8495 16 September 2005. Summary of changes for version 20050916:
8497 1) ACPI CA Core Subsystem:
8499 Fixed a problem within the Resource Manager where support for the Generic
8500 Register descriptor was not fully implemented. This descriptor is now
8502 recognized, parsed, disassembled, and displayed.
8504 Completely restructured the Resource Manager code to utilize table-driven
8505 dispatch and lookup, eliminating many of the large switch() statements.
8507 reduces overall subsystem code size and code complexity. Affects the
8508 resource parsing and construction, disassembly, and debug dump output.
8510 Cleaned up and restructured the debug dump output for all resource
8511 descriptors. Improved readability of the output and reduced code size.
8513 Fixed a problem where changes to internal data structures caused the
8514 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
8516 Code and Data Size: The current and previous library sizes for the core
8517 subsystem are shown below. These are the code and data sizes for the
8518 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
8520 values do not include any ACPI driver or OSPM code. The debug version of
8522 code includes the debug output trace mechanism and has a much larger code
8523 and data size. Note that these values will vary depending on the
8525 of the compiler and the compiler options used during generation.
8528 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
8529 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
8531 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
8532 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
8535 2) iASL Compiler/Disassembler:
8537 Updated the disassembler to automatically insert an EndDependentFn()
8539 into the ASL stream if this macro is missing in the original AML code,
8540 simplifying compilation of the resulting ASL module.
8542 Fixed a problem in the disassembler where a disassembled ResourceSource
8543 string (within a large resource descriptor) was not surrounded by quotes
8545 not followed by a comma, causing errors when the resulting ASL module was
8546 compiled. Also, escape sequences within a ResourceSource string are now
8547 handled correctly (especially "\\")
8549 ----------------------------------------
8550 02 September 2005. Summary of changes for version 20050902:
8552 1) ACPI CA Core Subsystem:
8554 Fixed a problem with the internal Owner ID allocation and deallocation
8555 mechanisms for control method execution and recursive method invocation.
8556 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
8557 messages seen on some systems. Recursive method invocation depth is
8558 currently limited to 255. (Alexey Starikovskiy)
8560 Completely eliminated all vestiges of support for the "module-level
8561 executable code" until this support is fully implemented and debugged.
8563 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
8564 some systems that invoke this support.
8566 Fixed a problem within the resource manager code where the transaction
8568 for a 64-bit address descriptor were handled incorrectly in the type-
8571 Consolidated duplicate code within the address descriptor resource
8573 code, reducing overall subsystem code size.
8575 Fixed a fault when using the AML debugger "disassemble" command to
8576 disassemble individual control methods.
8578 Removed references to the "release_current" directory within the Unix
8581 Code and Data Size: The current and previous core subsystem library sizes
8582 are shown below. These are the code and data sizes for the acpica.lib
8583 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
8584 include any ACPI driver or OSPM code. The debug version of the code
8586 the debug output trace mechanism and has a much larger code and data
8588 Note that these values will vary depending on the efficiency of the
8590 and the compiler options used during generation.
8593 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
8594 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
8596 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
8597 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
8600 2) iASL Compiler/Disassembler:
8602 Implemented an error check for illegal duplicate values in the interrupt
8604 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
8607 Implemented error checking for the Irq() and IrqNoFlags() macros to
8609 too many values in the interrupt list (16 max) and invalid values in the
8612 The maximum length string literal within an ASL file is now restricted to
8613 200 characters as per the ACPI specification.
8615 Fixed a fault when using the -ln option (generate namespace listing).
8617 Implemented an error check to determine if a DescriptorName within a
8618 resource descriptor has already been used within the current scope.
8620 ----------------------------------------
8621 15 August 2005. Summary of changes for version 20050815:
8623 1) ACPI CA Core Subsystem:
8625 Implemented a full bytewise compare to determine if a table load request
8627 attempting to load a duplicate table. The compare is performed if the
8629 signatures and table lengths match. This will allow different tables with
8630 the same OEM Table ID and revision to be loaded - probably against the
8632 specification, but discovered in the field nonetheless.
8634 Added the changes.txt logfile to each of the zipped release packages.
8636 Code and Data Size: Current and previous core subsystem library sizes are
8637 shown below. These are the code and data sizes for the acpica.lib
8639 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8640 any ACPI driver or OSPM code. The debug version of the code includes the
8641 debug output trace mechanism and has a much larger code and data size.
8643 that these values will vary depending on the efficiency of the compiler
8645 the compiler options used during generation.
8648 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
8649 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
8651 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
8652 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
8655 2) iASL Compiler/Disassembler:
8657 Fixed a problem where incorrect AML code could be generated for Package
8658 objects if optimization is disabled (via the -oa switch).
8660 Fixed a problem with where incorrect AML code is generated for variable-
8661 length packages when the package length is not specified and the number
8663 initializer values is greater than 255.
8666 ----------------------------------------
8667 29 July 2005. Summary of changes for version 20050729:
8669 1) ACPI CA Core Subsystem:
8671 Implemented support to ignore an attempt to install/load a particular
8673 table more than once. Apparently there exists BIOS code that repeatedly
8674 attempts to load the same SSDT upon certain events. With assistance from
8675 Venkatesh Pallipadi.
8677 Restructured the main interface to the AML parser in order to correctly
8678 handle all exceptional conditions. This will prevent leakage of the
8680 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
8682 machines. With assistance from Alexey Starikovskiy.
8684 Support for "module level code" has been disabled in this version due to
8686 number of issues that have appeared on various machines. The support can
8688 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
8689 compilation. When the issues are fully resolved, the code will be enabled
8693 Modified the internal functions for debug print support to define the
8694 FunctionName parameter as a (const char *) for compatibility with
8696 built-in macros such as __FUNCTION__, etc.
8698 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
8700 Implemented support to display an object count summary for the AML
8702 commands Object and Methods.
8704 Code and Data Size: Current and previous core subsystem library sizes are
8705 shown below. These are the code and data sizes for the acpica.lib
8707 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8708 any ACPI driver or OSPM code. The debug version of the code includes the
8709 debug output trace mechanism and has a much larger code and data size.
8711 that these values will vary depending on the efficiency of the compiler
8713 the compiler options used during generation.
8716 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
8717 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
8719 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
8720 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
8723 2) iASL Compiler/Disassembler:
8725 Fixed a regression that appeared in the 20050708 version of the compiler
8726 where an error message was inadvertently emitted for invocations of the
8728 reserved control method.
8730 ----------------------------------------
8731 08 July 2005. Summary of changes for version 20050708:
8733 1) ACPI CA Core Subsystem:
8735 The use of the CPU stack in the debug version of the subsystem has been
8736 considerably reduced. Previously, a debug structure was declared in every
8737 function that used the debug macros. This structure has been removed in
8738 favor of declaring the individual elements as parameters to the debug
8739 functions. This reduces the cumulative stack use during nested execution
8741 ACPI function calls at the cost of a small increase in the code size of
8743 debug version of the subsystem. With assistance from Alexey Starikovskiy
8747 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
8748 headers to define a macro that will return the current function name at
8749 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
8751 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
8752 compiler-dependent header, the function name is saved on the CPU stack
8754 pointer per function.) This mechanism is used because apparently there
8755 exists no standard ANSI-C defined macro that that returns the function
8758 Redesigned and reimplemented the "Owner ID" mechanism used to track
8759 namespace objects created/deleted by ACPI tables and control method
8760 execution. A bitmap is now used to allocate and free the IDs, thus
8762 the wraparound problem present in the previous implementation. The size
8764 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
8767 Removed the UINT32_BIT and UINT16_BIT types that were used for the
8769 flag definitions within the headers for the predefined ACPI tables. These
8770 have been replaced by UINT8_BIT in order to increase the code portability
8772 the subsystem. If the use of UINT8 remains a problem, we may be forced to
8773 eliminate bitfields entirely because of a lack of portability.
8775 Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
8777 is a frequently used function and this improvement increases the
8779 of the entire subsystem (Alexey Starikovskiy).
8781 Fixed several possible memory leaks and the inverse - premature object
8782 deletion (Alexey Starikovskiy).
8784 Code and Data Size: Current and previous core subsystem library sizes are
8785 shown below. These are the code and data sizes for the acpica.lib
8787 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8788 any ACPI driver or OSPM code. The debug version of the code includes the
8789 debug output trace mechanism and has a much larger code and data size.
8791 that these values will vary depending on the efficiency of the compiler
8793 the compiler options used during generation.
8796 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
8797 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
8799 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
8800 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
8802 ----------------------------------------
8803 24 June 2005. Summary of changes for version 20050624:
8805 1) ACPI CA Core Subsystem:
8807 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
8808 the host-defined cache object. This allows the OSL implementation to
8810 and type this object in any manner desired, simplifying the OSL
8811 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
8812 Linux, and should be defined in the OS-specific header file for other
8813 operating systems as required.
8815 Changed the interface to AcpiOsAcquireObject to directly return the
8816 requested object as the function return (instead of ACPI_STATUS.) This
8817 change was made for performance reasons, since this is the purpose of the
8818 interface in the first place. AcpiOsAcquireObject is now similar to the
8819 AcpiOsAllocate interface.
8821 Implemented a new AML debugger command named Businfo. This command
8823 information about all devices that have an associate _PRT object. The
8825 _HID, _UID, and _CID are displayed for these devices.
8827 Modified the initialization sequence in AcpiInitializeSubsystem to call
8829 OSL interface AcpiOslInitialize first, before any local initialization.
8831 change was required because the global initialization now calls OSL
8834 Enhanced the Dump command to display the entire contents of Package
8836 (including all sub-objects and their values.)
8838 Restructured the code base to split some files because of size and/or
8839 because the code logically belonged in a separate file. New files are
8841 below. All makefiles and project files included in the ACPI CA release
8844 utilities/utcache.c /* Local cache interfaces */
8845 utilities/utmutex.c /* Local mutex support */
8846 utilities/utstate.c /* State object support */
8847 interpreter/parser/psloop.c /* Main AML parse loop */
8849 Code and Data Size: Current and previous core subsystem library sizes are
8850 shown below. These are the code and data sizes for the acpica.lib
8852 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8853 any ACPI driver or OSPM code. The debug version of the code includes the
8854 debug output trace mechanism and has a much larger code and data size.
8856 that these values will vary depending on the efficiency of the compiler
8858 the compiler options used during generation.
8861 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
8862 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
8864 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
8865 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
8868 2) iASL Compiler/Disassembler:
8870 Fixed a regression introduced in version 20050513 where the use of a
8872 object within a Case() statement caused a compile time exception. The
8873 original behavior has been restored (a Match() operator is emitted.)
8875 ----------------------------------------
8876 17 June 2005. Summary of changes for version 20050617:
8878 1) ACPI CA Core Subsystem:
8880 Moved the object cache operations into the OS interface layer (OSL) to
8882 the host OS to handle these operations if desired (for example, the Linux
8883 OSL will invoke the slab allocator). This support is optional; the
8885 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
8887 code in the ACPI CA core. The new OSL interfaces are shown below. See
8888 utalloc.c for an example implementation, and acpiosxf.h for the exact
8889 interface definitions. With assistance from Alexey Starikovskiy.
8896 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
8898 and restore a flags parameter. This fits better with many OS lock models.
8899 Note: the current execution state (interrupt handler or not) is no longer
8900 passed to these interfaces. If necessary, the OSL must determine this
8902 by itself, a simple and fast operation. With assistance from Alexey
8905 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
8906 present if the revision of the RSDP was 2 or greater. According to the
8908 specification, the XSDT is optional in all cases, and the table manager
8909 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
8910 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
8914 Fixed an interpreter problem with the Mid() operator in the case of an
8916 string where the resulting output string is of zero length. It now
8918 returns a valid, null terminated string object instead of a string object
8919 with a null pointer.
8921 Fixed a problem with the control method argument handling to allow a
8923 to an Arg object that already contains an object of type Device. The
8925 object is now correctly overwritten. Previously, an error was returned.
8928 Enhanced the debugger Find command to emit object values in addition to
8930 found object pathnames. The output format is the same as the dump
8934 Enhanced the debugger Set command. It now has the ability to set the
8936 of any Named integer object in the namespace (Previously, only method
8938 and args could be set.)
8940 Code and Data Size: Current and previous core subsystem library sizes are
8941 shown below. These are the code and data sizes for the acpica.lib
8943 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8944 any ACPI driver or OSPM code. The debug version of the code includes the
8945 debug output trace mechanism and has a much larger code and data size.
8947 that these values will vary depending on the efficiency of the compiler
8949 the compiler options used during generation.
8952 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
8953 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
8955 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
8956 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
8959 2) iASL Compiler/Disassembler:
8961 Fixed a regression in the disassembler where if/else/while constructs
8963 output incorrectly. This problem was introduced in the previous release
8964 (20050526). This problem also affected the single-step disassembly in the
8967 Fixed a problem where compiling the reserved _OSI method would randomly
8969 rarely) produce compile errors.
8971 Enhanced the disassembler to emit compilable code in the face of
8973 AML resource descriptors. If the optional ResourceSourceIndex is present,
8974 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
8975 disassembly. Otherwise, the resulting code cannot be compiled without
8978 ----------------------------------------
8979 26 May 2005. Summary of changes for version 20050526:
8981 1) ACPI CA Core Subsystem:
8983 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
8984 the module level (not within a control method.) These opcodes are
8986 exactly once at the time the table is loaded. This type of code was legal
8988 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
8990 order to provide backwards compatibility with earlier BIOS
8992 This eliminates the "Encountered executable code at module level" warning
8993 that was previously generated upon detection of such code.
8995 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
8996 inadvertently be generated during the lookup of namespace objects in the
8997 second pass parse of ACPI tables and control methods. It appears that
8999 problem could occur during the resolution of forward references to
9003 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
9004 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
9005 allows the deadlock detection debug code to be compiled out in the normal
9006 case, improving mutex performance (and overall subsystem performance)
9009 Implemented a handful of miscellaneous fixes for possible memory leaks on
9010 error conditions and error handling control paths. These fixes were
9011 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
9013 Added a check for a null RSDT pointer in AcpiGetFirmwareTable
9015 to prevent a fault in this error case.
9017 Code and Data Size: Current and previous core subsystem library sizes are
9018 shown below. These are the code and data sizes for the acpica.lib
9020 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9021 any ACPI driver or OSPM code. The debug version of the code includes the
9022 debug output trace mechanism and has a much larger code and data size.
9024 that these values will vary depending on the efficiency of the compiler
9026 the compiler options used during generation.
9029 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
9030 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
9032 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
9033 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
9036 2) iASL Compiler/Disassembler:
9038 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
9039 the module level (not within a control method.) These operators will be
9040 executed once at the time the table is loaded. This type of code was
9042 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
9043 compiler in order to provide backwards compatibility with earlier BIOS
9047 The ACPI integer width (specified via the table revision ID or the -r
9048 override, 32 or 64 bits) is now used internally during compile-time
9050 folding to ensure that constants are truncated to 32 bits if necessary.
9051 Previously, the revision ID value was only emitted in the AML table
9054 An error message is now generated for the Mutex and Method operators if
9056 SyncLevel parameter is outside the legal range of 0 through 15.
9058 Fixed a problem with the Method operator ParameterTypes list handling
9060 3.0). Previously, more than 2 types or 2 arguments generated a syntax
9062 The actual underlying implementation of method argument typechecking is
9063 still under development, however.
9065 ----------------------------------------
9066 13 May 2005. Summary of changes for version 20050513:
9068 1) ACPI CA Core Subsystem:
9070 Implemented support for PCI Express root bridges -- added support for
9072 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
9074 The interpreter now automatically truncates incoming 64-bit constants to
9076 bits if currently executing out of a 32-bit ACPI table (Revision < 2).
9078 also affects the iASL compiler constant folding. (Note: as per below, the
9079 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
9081 Fixed a problem where string and buffer objects with "static" pointers
9082 (pointers to initialization data within an ACPI table) were not handled
9083 consistently. The internal object copy operation now always copies the
9085 to a newly allocated buffer, regardless of whether the source object is
9088 Fixed a problem with the FromBCD operator where an implicit result
9089 conversion was improperly performed while storing the result to the
9091 operand. Since this is an "explicit conversion" operator, the implicit
9092 conversion should never be performed on the output.
9094 Fixed a problem with the CopyObject operator where a copy to an existing
9095 named object did not always completely overwrite the existing object
9097 at name. Specifically, a buffer-to-buffer copy did not delete the
9101 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
9103 structs for consistency.
9105 Code and Data Size: Current and previous core subsystem library sizes are
9106 shown below. These are the code and data sizes for the acpica.lib
9108 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9109 any ACPI driver or OSPM code. The debug version of the code includes the
9110 debug output trace mechanism and has a much larger code and data size.
9112 that these values will vary depending on the efficiency of the compiler
9114 the compiler options used during generation.
9117 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
9118 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
9119 Current Release: (Same sizes)
9120 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
9121 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
9124 2) iASL Compiler/Disassembler:
9126 The compiler now emits a warning if an attempt is made to generate a 64-
9128 integer constant from within a 32-bit ACPI table (Revision < 2). The
9130 is truncated to 32 bits.
9132 Fixed a problem with large package objects: if the static length of the
9133 package is greater than 255, the "variable length package" opcode is
9134 emitted. Previously, this caused an error. This requires an update to the
9135 ACPI spec, since it currently (incorrectly) states that packages larger
9137 255 elements are not allowed.
9139 The disassembler now correctly handles variable length packages and
9141 larger than 255 elements.
9143 ----------------------------------------
9144 08 April 2005. Summary of changes for version 20050408:
9146 1) ACPI CA Core Subsystem:
9148 Fixed three cases in the interpreter where an "index" argument to an ASL
9149 function was still (internally) 32 bits instead of the required 64 bits.
9150 This was the Index argument to the Index, Mid, and Match operators.
9152 The "strupr" function is now permanently local (AcpiUtStrupr), since this
9154 not a POSIX-defined function and not present in most kernel-level C
9155 libraries. All references to the C library strupr function have been
9159 Completed the deployment of static functions/prototypes. All prototypes
9161 the static attribute have been moved from the headers to the owning C
9164 Implemented an extract option (-e) for the AcpiBin utility (AML binary
9165 utility). This option allows the utility to extract individual ACPI
9167 from the output of AcpiDmp. It provides the same functionality of the
9168 acpixtract.pl perl script without the worry of setting the correct perl
9169 options. AcpiBin runs on Windows and has not yet been generated/validated
9171 the Linux/Unix environment (but should be soon).
9173 Updated and fixed the table dump option for AcpiBin (-d). This option
9174 converts a single ACPI table to a hex/ascii file, similar to the output
9178 Code and Data Size: Current and previous core subsystem library sizes are
9179 shown below. These are the code and data sizes for the acpica.lib
9181 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9182 any ACPI driver or OSPM code. The debug version of the code includes the
9183 debug output trace mechanism and has a much larger code and data size.
9185 that these values will vary depending on the efficiency of the compiler
9187 the compiler options used during generation.
9190 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
9191 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
9193 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
9194 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
9197 2) iASL Compiler/Disassembler:
9199 Disassembler fix: Added a check to ensure that the table length found in
9201 ACPI table header within the input file is not longer than the actual
9203 file size. This indicates some kind of file or table corruption.
9205 ----------------------------------------
9206 29 March 2005. Summary of changes for version 20050329:
9208 1) ACPI CA Core Subsystem:
9210 An error is now generated if an attempt is made to create a Buffer Field
9212 length zero (A CreateField with a length operand of zero.)
9214 The interpreter now issues a warning whenever executable code at the
9216 level is detected during ACPI table load. This will give some idea of the
9217 prevalence of this type of code.
9219 Implemented support for references to named objects (other than control
9220 methods) within package objects.
9222 Enhanced package object output for the debug object. Package objects are
9224 completely dumped, showing all elements.
9226 Enhanced miscellaneous object output for the debug object. Any object can
9227 now be written to the debug object (for example, a device object can be
9228 written, and the type of the object will be displayed.)
9230 The "static" qualifier has been added to all local functions across both
9232 core subsystem and the iASL compiler.
9234 The number of "long" lines (> 80 chars) within the source has been
9235 significantly reduced, by about 1/3.
9237 Cleaned up all header files to ensure that all CA/iASL functions are
9238 prototyped (even static functions) and the formatting is consistent.
9240 Two new header files have been added, acopcode.h and acnames.h.
9242 Removed several obsolete functions that were no longer used.
9244 Code and Data Size: Current and previous core subsystem library sizes are
9245 shown below. These are the code and data sizes for the acpica.lib
9247 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9248 any ACPI driver or OSPM code. The debug version of the code includes the
9249 debug output trace mechanism and has a much larger code and data size.
9251 that these values will vary depending on the efficiency of the compiler
9253 the compiler options used during generation.
9256 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
9257 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
9259 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
9260 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
9264 2) iASL Compiler/Disassembler:
9266 Fixed a problem with the resource descriptor generation/support. For the
9267 ResourceSourceIndex and the ResourceSource fields, both must be present,
9269 both must be not present - can't have one without the other.
9271 The compiler now returns non-zero from the main procedure if any errors
9273 occurred during the compilation.
9276 ----------------------------------------
9277 09 March 2005. Summary of changes for version 20050309:
9279 1) ACPI CA Core Subsystem:
9281 The string-to-buffer implicit conversion code has been modified again
9283 a change to the ACPI specification. In order to match the behavior of
9285 other major ACPI implementation, the target buffer is no longer truncated
9287 the source string is smaller than an existing target buffer. This change
9288 requires an update to the ACPI spec, and should eliminate the recent
9289 AE_AML_BUFFER_LIMIT issues.
9291 The "implicit return" support was rewritten to a new algorithm that
9293 the general case. Rather than attempt to determine when a method is about
9295 exit, the result of every ASL operator is saved momentarily until the
9297 next ASL operator is executed. Therefore, no matter how the method exits,
9298 there will always be a saved implicit return value. This feature is only
9299 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
9301 AE_AML_NO_RETURN_VALUE errors when enabled.
9303 Implemented implicit conversion support for the predicate (operand) of
9305 If, Else, and While operators. String and Buffer arguments are
9307 converted to Integers.
9309 Changed the string-to-integer conversion behavior to match the new ACPI
9310 errata: "If no integer object exists, a new integer is created. The ASCII
9311 string is interpreted as a hexadecimal constant. Each string character is
9312 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
9313 with the first character as the most significant digit, and ending with
9315 first non-hexadecimal character or end-of-string." This means that the
9317 non-hex character terminates the conversion and this is the code that was
9320 Fixed a problem where the ObjectType operator would fail (fault) when
9322 on an Index of a Package which pointed to a null package element. The
9323 operator now properly returns zero (Uninitialized) in this case.
9325 Fixed a problem where the While operator used excessive memory by not
9326 properly popping the result stack during execution. There was no memory
9328 after execution, however. (Code provided by Valery Podrezov.)
9330 Fixed a problem where references to control methods within Package
9332 caused the method to be invoked, instead of producing a reference object
9333 pointing to the method.
9335 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
9337 improve performance and reduce code size. (Code provided by Alexey
9340 Code and Data Size: Current and previous core subsystem library sizes are
9341 shown below. These are the code and data sizes for the acpica.lib
9343 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9344 any ACPI driver or OSPM code. The debug version of the code includes the
9345 debug output trace mechanism and has a much larger code and data size.
9347 that these values will vary depending on the efficiency of the compiler
9349 the compiler options used during generation.
9352 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
9353 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
9355 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
9356 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
9359 2) iASL Compiler/Disassembler:
9361 Fixed a problem with the Return operator with no arguments. Since the AML
9362 grammar for the byte encoding requires an operand for the Return opcode,
9364 compiler now emits a Return(Zero) for this case. An ACPI specification
9365 update has been written for this case.
9367 For tables other than the DSDT, namepath optimization is automatically
9368 disabled. This is because SSDTs can be loaded anywhere in the namespace,
9370 compiler has no knowledge of where, and thus cannot optimize namepaths.
9372 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
9373 inadvertently omitted from the ACPI specification, and will require an
9376 The source file scan for ASCII characters is now optional (-a). This
9378 was made because some vendors place non-ascii characters within comments.
9379 However, the scan is simply a brute-force byte compare to ensure all
9380 characters in the file are in the range 0x00 to 0x7F.
9382 Fixed a problem with the CondRefOf operator where the compiler was
9383 inappropriately checking for the existence of the target. Since the point
9385 the operator is to check for the existence of the target at run-time, the
9386 compiler no longer checks for the target existence.
9388 Fixed a problem where errors generated from the internal AML interpreter
9389 during constant folding were not handled properly, causing a fault.
9391 Fixed a problem with overly aggressive range checking for the Stall
9392 operator. The valid range (max 255) is now only checked if the operand is
9394 type Integer. All other operand types cannot be statically checked.
9396 Fixed a problem where control method references within the RefOf,
9398 and ObjectType operators were not treated properly. They are now treated
9400 actual references, not method invocations.
9402 Fixed and enhanced the "list namespace" option (-ln). This option was
9404 a number of releases ago.
9406 Improved error handling for the Field, IndexField, and BankField
9408 The compiler now cleanly reports and recovers from errors in the field
9409 component (FieldUnit) list.
9411 Fixed a disassembler problem where the optional ResourceDescriptor fields
9412 TRS and TTP were not always handled correctly.
9414 Disassembler - Comments in output now use "//" instead of "/*"
9416 ----------------------------------------
9417 28 February 2005. Summary of changes for version 20050228:
9419 1) ACPI CA Core Subsystem:
9421 Fixed a problem where the result of an Index() operator (an object
9422 reference) must increment the reference count on the target object for
9424 life of the object reference.
9426 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
9427 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
9429 resource descriptors.
9431 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
9432 Space Descriptor" string, indicating interpreter support for the
9436 Implemented header support for the new ACPI 3.0 FADT flag bits.
9438 Implemented header support for the new ACPI 3.0 PCI Express bits for the
9440 status/enable registers.
9442 Updated header support for the MADT processor local Apic struct and MADT
9443 platform interrupt source struct for new ACPI 3.0 fields.
9445 Implemented header support for the SRAT and SLIT ACPI tables.
9447 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
9451 Code and Data Size: Current and previous core subsystem library sizes are
9452 shown below. These are the code and data sizes for the acpica.lib
9454 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9455 any ACPI driver or OSPM code. The debug version of the code includes the
9456 debug output trace mechanism and has a much larger code and data size.
9458 that these values will vary depending on the efficiency of the compiler
9460 the compiler options used during generation.
9463 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
9464 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
9466 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
9467 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
9470 2) iASL Compiler/Disassembler:
9472 Fixed a problem with the internal 64-bit String-to-integer conversion
9474 strings less than two characters long.
9476 Fixed a problem with constant folding where the result of the Index()
9477 operator can not be considered a constant. This means that Index() cannot
9479 a type3 opcode and this will require an update to the ACPI specification.
9481 Disassembler: Implemented support for the TTP, MTP, and TRS resource
9482 descriptor fields. These fields were inadvertently ignored and not output
9484 the disassembly of the resource descriptor.
9487 ----------------------------------------
9488 11 February 2005. Summary of changes for version 20050211:
9490 1) ACPI CA Core Subsystem:
9492 Implemented ACPI 3.0 support for implicit conversion within the Match()
9493 operator. MatchObjects can now be of type integer, buffer, or string
9495 of just type integer. Package elements are implicitly converted to the
9497 of the MatchObject. This change aligns the behavior of Match() with the
9498 behavior of the other logical operators (LLess(), etc.) It also requires
9500 errata change to the ACPI specification as this support was intended for
9501 ACPI 3.0, but was inadvertently omitted.
9503 Fixed a problem with the internal implicit "to buffer" conversion.
9505 that are converted to buffers will cause buffer truncation if the string
9507 smaller than the target buffer. Integers that are converted to buffers
9509 not cause buffer truncation, only zero extension (both as per the ACPI
9510 spec.) The problem was introduced when code was added to truncate the
9511 buffer, but this should not be performed in all cases, only the string
9514 Fixed a problem with the Buffer and Package operators where the
9516 would get confused if two such operators were used as operands to an ASL
9517 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
9518 stack was not being popped after the execution of these operators,
9520 in an AE_NO_RETURN_VALUE exception.
9522 Fixed a problem with constructs of the form Store(Index(...),...). The
9523 reference object returned from Index was inadvertently resolved to an
9525 value. This problem was introduced in version 20050114 when the behavior
9527 Store() was modified to restrict the object types that can be used as the
9528 source operand (to match the ACPI specification.)
9530 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
9532 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
9534 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
9536 Code and Data Size: Current and previous core subsystem library sizes are
9537 shown below. These are the code and data sizes for the acpica.lib
9539 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9540 any ACPI driver or OSPM code. The debug version of the code includes the
9541 debug output trace mechanism and has a much larger code and data size.
9543 that these values will vary depending on the efficiency of the compiler
9545 the compiler options used during generation.
9548 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
9549 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
9551 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
9552 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
9555 2) iASL Compiler/Disassembler:
9557 Fixed a code generation problem in the constant folding optimization code
9558 where incorrect code was generated if a constant was reduced to a buffer
9559 object (i.e., a reduced type 5 opcode.)
9561 Fixed a typechecking problem for the ToBuffer operator. Caused by an
9562 incorrect return type in the internal opcode information table.
9564 ----------------------------------------
9565 25 January 2005. Summary of changes for version 20050125:
9567 1) ACPI CA Core Subsystem:
9569 Fixed a recently introduced problem with the Global Lock where the
9570 underlying semaphore was not created. This problem was introduced in
9571 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
9572 Acquire() operation on _GL.
9574 The local object cache is now optional, and is disabled by default. Both
9575 AcpiExec and the iASL compiler enable the cache because they run in user
9576 mode and this enhances their performance. #define
9577 ACPI_ENABLE_OBJECT_CACHE
9578 to enable the local cache.
9580 Fixed an issue in the internal function AcpiUtEvaluateObject concerning
9582 optional "implicit return" support where an error was returned if no
9584 object was expected, but one was implicitly returned. AE_OK is now
9586 in this case and the implicitly returned object is deleted.
9587 AcpiUtEvaluateObject is only occasionally used, and only to execute
9589 methods such as _STA and _INI where the return type is known up front.
9591 Fixed a few issues with the internal convert-to-integer code. It now
9593 an error if an attempt is made to convert a null string, a string of only
9594 blanks/tabs, or a zero-length buffer. This affects both implicit
9596 and explicit conversion via the ToInteger() operator.
9598 The internal debug code in AcpiUtAcquireMutex has been commented out. It
9600 not needed for normal operation and should increase the performance of
9602 entire subsystem. The code remains in case it is needed for debug
9606 The AcpiExec source and makefile are included in the Unix/Linux package
9610 Code and Data Size: Current and previous core subsystem library sizes are
9611 shown below. These are the code and data sizes for the acpica.lib
9613 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9614 any ACPI driver or OSPM code. The debug version of the code includes the
9615 debug output trace mechanism and has a much larger code and data size.
9617 that these values will vary depending on the efficiency of the compiler
9619 the compiler options used during generation.
9622 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
9623 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
9625 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
9626 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
9628 2) iASL Compiler/Disassembler:
9630 Switch/Case support: A warning is now issued if the type of the Switch
9632 cannot be determined at compile time. For example, Switch(Arg0) will
9633 generate the warning, and the type is assumed to be an integer. As per
9635 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
9639 Switch/Case support: Implemented support for buffer and string objects as
9640 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
9641 buffers and strings.
9643 Switch/Case support: The emitted code for the LEqual() comparisons now
9645 the switch value as the first operand, not the second. The case value is
9647 the second operand, and this allows the case value to be implicitly
9648 converted to the type of the switch value, not the other way around.
9650 Switch/Case support: Temporary variables are now emitted immediately
9652 the control method, not at the global level. This means that there are
9654 36 temps available per-method, not 36 temps per-module as was the case
9656 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
9658 ----------------------------------------
9659 14 January 2005. Summary of changes for version 20050114:
9661 Added 2005 copyright to all module headers. This affects every module in
9662 the core subsystem, iASL compiler, and the utilities.
9664 1) ACPI CA Core Subsystem:
9666 Fixed an issue with the String-to-Buffer conversion code where the string
9667 null terminator was not included in the buffer after conversion, but
9669 is existing ASL that assumes the string null terminator is included. This
9671 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
9672 introduced in the previous version when the code was updated to correctly
9673 set the converted buffer size as per the ACPI specification. The ACPI
9675 is ambiguous and will be updated to specify that the null terminator must
9677 included in the converted buffer. This also affects the ToBuffer() ASL
9680 Fixed a problem with the Mid() ASL/AML operator where it did not work
9681 correctly on Buffer objects. Newly created sub-buffers were not being
9686 Fixed a problem in AcpiTbFindTable where incorrect string compares were
9687 performed on the OemId and OemTableId table header fields. These fields
9689 not null terminated, so strncmp is now used instead of strcmp.
9691 Implemented a restriction on the Store() ASL/AML operator to align the
9692 behavior with the ACPI specification. Previously, any object could be
9694 as the source operand. Now, the only objects that may be used are
9696 Buffers, Strings, Packages, Object References, and DDB Handles. If
9697 necessary, the original behavior can be restored by enabling the
9698 EnableInterpreterSlack flag.
9700 Enhanced the optional "implicit return" support to allow an implicit
9702 value from methods that are invoked externally via the AcpiEvaluateObject
9703 interface. This enables implicit returns from the _STA and _INI methods,
9706 Changed the Revision() ASL/AML operator to return the current version of
9708 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
9710 the supported ACPI version (This is the function of the _REV method).
9712 Updated the _REV predefined method to return the currently supported
9716 Implemented batch mode option for the AcpiExec utility (-b).
9718 Code and Data Size: Current and previous core subsystem library sizes are
9719 shown below. These are the code and data sizes for the acpica.lib
9721 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9722 any ACPI driver or OSPM code. The debug version of the code includes the
9723 debug output trace mechanism and has a much larger code and data size.
9725 that these values will vary depending on the efficiency of the compiler
9727 the compiler options used during generation.
9730 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
9731 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
9733 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
9734 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
9736 ----------------------------------------
9737 10 December 2004. Summary of changes for version 20041210:
9739 ACPI 3.0 support is nearing completion in both the iASL compiler and the
9740 ACPI CA core subsystem.
9742 1) ACPI CA Core Subsystem:
9744 Fixed a problem in the ToDecimalString operator where the resulting
9746 length was incorrectly calculated. The length is now calculated exactly,
9747 eliminating incorrect AE_STRING_LIMIT exceptions.
9749 Fixed a problem in the ToHexString operator to allow a maximum 200
9751 string to be produced.
9753 Fixed a problem in the internal string-to-buffer and buffer-to-buffer
9755 routine where the length of the resulting buffer was not truncated to the
9756 new size (if the target buffer already existed).
9758 Code and Data Size: Current and previous core subsystem library sizes are
9759 shown below. These are the code and data sizes for the acpica.lib
9761 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9762 any ACPI driver or OSPM code. The debug version of the code includes the
9763 debug output trace mechanism and has a much larger code and data size.
9765 that these values will vary depending on the efficiency of the compiler
9767 the compiler options used during generation.
9770 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
9771 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
9773 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
9774 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
9777 2) iASL Compiler/Disassembler:
9779 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
9780 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
9781 Includes support in the disassembler.
9783 Implemented support for the new (ACPI 3.0) parameter to the Register
9787 Fixed a problem where the _HE resource name for the Interrupt macro was
9788 referencing bit 0 instead of bit 1.
9790 Implemented check for maximum 255 interrupts in the Interrupt macro.
9792 Fixed a problem with the predefined resource descriptor names where
9793 incorrect AML code was generated if the offset within the resource buffer
9794 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
9795 but did not update the surrounding package lengths.
9797 Changes to the Dma macro: All channels within the channel list must be
9799 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
9800 optional (default is BusMaster).
9802 Implemented check for maximum 7 data bytes for the VendorShort macro.
9804 The ReadWrite parameter is now optional for the Memory32 and similar
9807 ----------------------------------------
9808 03 December 2004. Summary of changes for version 20041203:
9810 1) ACPI CA Core Subsystem:
9812 The low-level field insertion/extraction code (exfldio) has been
9814 rewritten to eliminate unnecessary complexity, bugs, and boundary
9817 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
9819 operators where the input operand could be inadvertently deleted if no
9820 conversion was necessary (e.g., if the input to ToInteger was an Integer
9823 Fixed a problem with the ToDecimalString and ToHexString where an
9825 exception code was returned if the resulting string would be > 200 chars.
9826 AE_STRING_LIMIT is now returned.
9828 Fixed a problem with the Concatenate operator where AE_OK was always
9829 returned, even if the operation failed.
9831 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
9832 semaphores to be allocated.
9834 Code and Data Size: Current and previous core subsystem library sizes are
9835 shown below. These are the code and data sizes for the acpica.lib
9837 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9838 any ACPI driver or OSPM code. The debug version of the code includes the
9839 debug output trace mechanism and has a much larger code and data size.
9841 that these values will vary depending on the efficiency of the compiler
9843 the compiler options used during generation.
9846 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
9847 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
9849 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
9850 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
9853 2) iASL Compiler/Disassembler:
9855 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
9856 recently introduced in 20041119.
9858 Fixed a problem with the ToUUID macro where the upper nybble of each
9860 byte was inadvertently set to zero.
9862 ----------------------------------------
9863 19 November 2004. Summary of changes for version 20041119:
9865 1) ACPI CA Core Subsystem:
9867 Fixed a problem in the internal ConvertToInteger routine where new
9869 were not truncated to 32 bits for 32-bit ACPI tables. This routine
9871 buffers and strings to integers.
9873 Implemented support to store a value to an Index() on a String object.
9875 is an ACPI 2.0 feature that had not yet been implemented.
9877 Implemented new behavior for storing objects to individual package
9879 (via the Index() operator). The previous behavior was to invoke the
9881 conversion rules if an object was already present at the index. The new
9882 behavior is to simply delete any existing object and directly store the
9884 object. Although the ACPI specification seems unclear on this subject,
9886 ACPI implementations behave in this manner. (This is the root of the
9887 AE_BAD_HEX_CONSTANT issue.)
9889 Modified the RSDP memory scan mechanism to support the extended checksum
9891 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
9892 RSDP signature is found with a valid checksum.
9894 Code and Data Size: Current and previous core subsystem library sizes are
9895 shown below. These are the code and data sizes for the acpica.lib
9897 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9898 any ACPI driver or OSPM code. The debug version of the code includes the
9899 debug output trace mechanism and has a much larger code and data size.
9901 that these values will vary depending on the efficiency of the compiler
9903 the compiler options used during generation.
9906 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
9907 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
9909 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
9910 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
9913 2) iASL Compiler/Disassembler:
9915 Fixed a missing semicolon in the aslcompiler.y file.
9917 ----------------------------------------
9918 05 November 2004. Summary of changes for version 20041105:
9920 1) ACPI CA Core Subsystem:
9922 Implemented support for FADT revision 2. This was an interim table
9924 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
9926 Implemented optional support to allow uninitialized LocalX and ArgX
9927 variables in a control method. The variables are initialized to an
9929 object with a value of zero. This support is enabled by setting the
9930 AcpiGbl_EnableInterpreterSlack flag to TRUE.
9932 Implemented support for Integer objects for the SizeOf operator. Either
9934 or 8 is returned, depending on the current integer size (32-bit or 64-
9936 depending on the parent table revision).
9938 Fixed a problem in the implementation of the SizeOf and ObjectType
9940 where the operand was resolved to a value too early, causing incorrect
9941 return values for some objects.
9943 Fixed some possible memory leaks during exceptional conditions.
9945 Code and Data Size: Current and previous core subsystem library sizes are
9946 shown below. These are the code and data sizes for the acpica.lib
9948 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9949 any ACPI driver or OSPM code. The debug version of the code includes the
9950 debug output trace mechanism and has a much larger code and data size.
9952 that these values will vary depending on the efficiency of the compiler
9954 the compiler options used during generation.
9957 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
9958 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
9960 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
9961 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
9964 2) iASL Compiler/Disassembler:
9966 Implemented support for all ACPI 3.0 reserved names and methods.
9968 Implemented all ACPI 3.0 grammar elements in the front-end, including
9969 support for semicolons.
9971 Implemented the ACPI 3.0 Function() and ToUUID() macros
9973 Fixed a problem in the disassembler where a Scope() operator would not be
9974 emitted properly if the target of the scope was in another table.
9976 ----------------------------------------
9977 15 October 2004. Summary of changes for version 20041015:
9979 Note: ACPI CA is currently undergoing an in-depth and complete formal
9980 evaluation to test/verify the following areas. Other suggestions are
9981 welcome. This will result in an increase in the frequency of releases and
9982 the number of bug fixes in the next few months.
9983 - Functional tests for all ASL/AML operators
9984 - All implicit/explicit type conversions
9985 - Bit fields and operation regions
9986 - 64-bit math support and 32-bit-only "truncated" math support
9987 - Exceptional conditions, both compiler and interpreter
9988 - Dynamic object deletion and memory leaks
9989 - ACPI 3.0 support when implemented
9990 - External interfaces to the ACPI subsystem
9993 1) ACPI CA Core Subsystem:
9995 Fixed two alignment issues on 64-bit platforms - within debug statements
9997 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
9999 field within the non-aligned ACPI generic address structure.
10001 Fixed a problem in the Increment and Decrement operators where incorrect
10002 operand resolution could result in the inadvertent modification of the
10003 original integer when the integer is passed into another method as an
10004 argument and the arg is then incremented/decremented.
10006 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
10008 BCD number were truncated during conversion.
10010 Fixed a problem in the ToDecimal operator where the length of the
10012 string could be set incorrectly too long if the input operand was a
10016 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
10018 within a buffer would prematurely terminate a compare between buffer
10021 Added a check for string overflow (>200 characters as per the ACPI
10022 specification) during the Concatenate operator with two string operands.
10024 Code and Data Size: Current and previous core subsystem library sizes are
10025 shown below. These are the code and data sizes for the acpica.lib
10027 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10028 any ACPI driver or OSPM code. The debug version of the code includes the
10029 debug output trace mechanism and has a much larger code and data size.
10031 that these values will vary depending on the efficiency of the compiler
10033 the compiler options used during generation.
10036 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
10037 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
10039 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
10040 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
10044 2) iASL Compiler/Disassembler:
10046 Allow the use of the ObjectType operator on uninitialized Locals and Args
10047 (returns 0 as per the ACPI specification).
10049 Fixed a problem where the compiler would fault if there was a syntax
10051 in the FieldName of all of the various CreateXXXField operators.
10053 Disallow the use of lower case letters within the EISAID macro, as per
10055 ACPI specification. All EISAID strings must be of the form "UUUNNNN"
10057 U is an uppercase letter and N is a hex digit.
10060 ----------------------------------------
10061 06 October 2004. Summary of changes for version 20041006:
10063 1) ACPI CA Core Subsystem:
10065 Implemented support for the ACPI 3.0 Timer operator. This ASL function
10066 implements a 64-bit timer with 100 nanosecond granularity.
10068 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
10069 implement the ACPI 3.0 Timer operator. This allows the host OS to
10071 the timer with the best clock available. Also, it keeps the core
10073 out of the clock handling business, since the host OS (usually) performs
10076 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
10077 functions use a 64-bit address which is part of the packed ACPI Generic
10078 Address Structure. Since the structure is non-aligned, the alignment
10080 are now used to extract the address to a local variable before use.
10082 Fixed a problem where the ToInteger operator assumed all input strings
10084 hexadecimal. The operator now handles both decimal strings and hex
10086 (prefixed with "0x").
10088 Fixed a problem where the string length in the string object created as a
10089 result of the internal ConvertToString procedure could be incorrect. This
10090 potentially affected all implicit conversions and also the
10092 and ToHexString operators.
10094 Fixed two problems in the ToString operator. If the length parameter was
10095 zero, an incorrect string object was created and the value of the input
10096 length parameter was inadvertently changed from zero to Ones.
10098 Fixed a problem where the optional ResourceSource string in the
10100 resource macro was ignored.
10102 Simplified the interfaces to the internal division functions, reducing
10104 size and complexity.
10106 Code and Data Size: Current and previous core subsystem library sizes are
10107 shown below. These are the code and data sizes for the acpica.lib
10109 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10110 any ACPI driver or OSPM code. The debug version of the code includes the
10111 debug output trace mechanism and has a much larger code and data size.
10113 that these values will vary depending on the efficiency of the compiler
10115 the compiler options used during generation.
10118 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
10119 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
10121 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
10122 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
10125 2) iASL Compiler/Disassembler:
10127 Implemented support for the ACPI 3.0 Timer operator.
10129 Fixed a problem where the Default() operator was inadvertently ignored in
10131 Switch/Case block. This was a problem in the translation of the Switch
10132 statement to If...Else pairs.
10134 Added support to allow a standalone Return operator, with no parentheses
10138 Fixed a problem with code generation for the ElseIf operator where the
10139 translated Else...If parse tree was improperly constructed leading to the
10142 ----------------------------------------
10143 22 September 2004. Summary of changes for version 20040922:
10145 1) ACPI CA Core Subsystem:
10147 Fixed a problem with the implementation of the LNot() operator where
10149 was not returned for the TRUE case. Changed the code to return Ones
10151 of (!Arg) which was usually 1. This change affects iASL constant folding
10153 this operator also.
10155 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was
10157 initialized properly -- Now zero the entire buffer in this case where the
10158 buffer already exists.
10160 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
10161 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
10162 related code considerably. This will require changes/updates to all OS
10163 interface layers (OSLs.)
10165 Implemented a new external interface, AcpiInstallExceptionHandler, to
10167 a system exception handler to be installed. This handler is invoked upon
10169 run-time exception that occurs during control method execution.
10171 Added support for the DSDT in AcpiTbFindTable. This allows the
10172 DataTableRegion() operator to access the local copy of the DSDT.
10174 Code and Data Size: Current and previous core subsystem library sizes are
10175 shown below. These are the code and data sizes for the acpica.lib
10177 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10178 any ACPI driver or OSPM code. The debug version of the code includes the
10179 debug output trace mechanism and has a much larger code and data size.
10181 that these values will vary depending on the efficiency of the compiler
10183 the compiler options used during generation.
10186 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
10187 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
10189 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
10190 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
10193 2) iASL Compiler/Disassembler:
10195 Fixed a problem with constant folding and the LNot operator. LNot was
10196 returning 1 in the TRUE case, not Ones as per the ACPI specification.
10198 could result in the generation of an incorrect folded/reduced constant.
10200 End-Of-File is now allowed within a "//"-style comment. A parse error no
10201 longer occurs if such a comment is at the very end of the input ASL
10205 Implemented the "-r" option to override the Revision in the table header.
10206 The initial use of this option will be to simplify the evaluation of the
10208 interpreter by allowing a single ASL source module to be compiled for
10210 32-bit or 64-bit integers.
10213 ----------------------------------------
10214 27 August 2004. Summary of changes for version 20040827:
10216 1) ACPI CA Core Subsystem:
10218 - Implemented support for implicit object conversion in the non-numeric
10219 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual,
10221 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
10222 the second operand is implicitly converted on the fly to match the type
10224 the first operand. For example:
10226 LEqual (Source1, Source2)
10228 Source1 and Source2 must each evaluate to an integer, a string, or a
10230 The data type of Source1 dictates the required type of Source2. Source2
10232 implicitly converted if necessary to match the type of Source1.
10234 - Updated and corrected the behavior of the string conversion support.
10236 rules concerning conversion of buffers to strings (according to the ACPI
10237 specification) are as follows:
10239 ToDecimalString - explicit byte-wise conversion of buffer to string of
10240 decimal values (0-255) separated by commas. ToHexString - explicit byte-
10242 conversion of buffer to string of hex values (0-FF) separated by commas.
10243 ToString - explicit byte-wise conversion of buffer to string. Byte-by-
10245 copy with no transform except NULL terminated. Any other implicit buffer-
10247 string conversion - byte-wise conversion of buffer to string of hex
10249 (0-FF) separated by spaces.
10251 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
10253 - Fixed a problem in AcpiNsGetPathnameLength where the returned length
10255 one byte too short in the case of a node in the root scope. This could
10256 cause a fault during debug output.
10258 - Code and Data Size: Current and previous core subsystem library sizes
10260 shown below. These are the code and data sizes for the acpica.lib
10262 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10263 any ACPI driver or OSPM code. The debug version of the code includes the
10264 debug output trace mechanism and has a much larger code and data size.
10266 that these values will vary depending on the efficiency of the compiler
10268 the compiler options used during generation.
10271 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
10272 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
10274 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
10275 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
10278 2) iASL Compiler/Disassembler:
10280 - Fixed a Linux generation error.
10283 ----------------------------------------
10284 16 August 2004. Summary of changes for version 20040816:
10286 1) ACPI CA Core Subsystem:
10288 Designed and implemented support within the AML interpreter for the so-
10289 called "implicit return". This support returns the result of the last
10291 operation within a control method, in the absence of an explicit Return()
10292 operator. A few machines depend on this behavior, even though it is not
10293 explicitly supported by the ASL language. It is optional support that
10295 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
10297 Removed support for the PCI_Config address space from the internal low
10299 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
10300 support was not used internally, and would not work correctly anyway
10302 the PCI bus number and segment number were not supported. There are
10303 separate interfaces for PCI configuration space access because of the
10307 Code and Data Size: Current and previous core subsystem library sizes are
10308 shown below. These are the code and data sizes for the acpica.lib
10310 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10311 any ACPI driver or OSPM code. The debug version of the code includes the
10312 debug output trace mechanism and has a much larger code and data size.
10314 that these values will vary depending on the efficiency of the compiler
10316 the compiler options used during generation.
10319 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
10320 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
10322 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
10323 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
10326 2) iASL Compiler/Disassembler:
10328 Fixed a problem where constants in ASL expressions at the root level (not
10329 within a control method) could be inadvertently truncated during code
10330 generation. This problem was introduced in the 20040715 release.
10333 ----------------------------------------
10334 15 July 2004. Summary of changes for version 20040715:
10336 1) ACPI CA Core Subsystem:
10338 Restructured the internal HW GPE interfaces to pass/track the current
10340 of interrupts (enabled/disabled) in order to avoid possible deadlock and
10341 increase flexibility of the interfaces.
10343 Implemented a "lexicographical compare" for String and Buffer objects
10345 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual -
10347 as per further clarification to the ACPI specification. Behavior is
10349 to C library "strcmp".
10351 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
10352 external function. In the 32-bit non-debug case, the stack use has been
10353 reduced from 168 bytes to 32 bytes.
10355 Deployed a new run-time configuration flag,
10356 AcpiGbl_EnableInterpreterSlack,
10357 whose purpose is to allow the AML interpreter to forgive certain bad AML
10358 constructs. Default setting is FALSE.
10360 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field
10362 support code. If enabled, it allows field access to go beyond the end of
10364 region definition if the field is within the region length rounded up to
10366 next access width boundary (a common coding error.)
10368 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
10369 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also,
10371 symbols are lowercased by the latest version of the AcpiSrc tool.
10373 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
10374 rename "Register" to simply "Reg" to prevent certain compilers from
10377 Code and Data Size: Current and previous core subsystem library sizes are
10378 shown below. These are the code and data sizes for the acpica.lib
10380 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10381 any ACPI driver or OSPM code. The debug version of the code includes the
10382 debug output trace mechanism and has a much larger code and data size.
10384 that these values will vary depending on the efficiency of the compiler
10386 the compiler options used during generation.
10389 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
10390 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
10392 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
10393 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
10396 2) iASL Compiler/Disassembler:
10398 Implemented full support for Package objects within the Case() operator.
10399 Note: The Break() operator is currently not supported within Case blocks
10400 (TermLists) as there is some question about backward compatibility with
10405 Fixed a problem where complex terms were not supported properly within
10409 Eliminated extraneous warning for compiler-emitted reserved names of the
10410 form "_T_x". (Used in Switch/Case operators.)
10412 Eliminated optimization messages for "_T_x" objects and small constants
10413 within the DefinitionBlock operator.
10416 ----------------------------------------
10417 15 June 2004. Summary of changes for version 20040615:
10419 1) ACPI CA Core Subsystem:
10421 Implemented support for Buffer and String objects (as per ACPI 2.0) for
10423 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
10426 All directory names in the entire source package are lower case, as they
10427 were in earlier releases.
10429 Implemented "Disassemble" command in the AML debugger that will
10431 a single control method.
10433 Code and Data Size: Current and previous core subsystem library sizes are
10434 shown below. These are the code and data sizes for the acpica.lib
10436 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10437 any ACPI driver or OSPM code. The debug version of the code includes the
10438 debug output trace mechanism and has a much larger code and data size.
10440 that these values will vary depending on the efficiency of the compiler
10442 the compiler options used during generation.
10445 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
10446 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
10449 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
10450 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
10453 2) iASL Compiler/Disassembler:
10455 Implemented support for Buffer and String objects (as per ACPI 2.0) for
10457 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
10460 All directory names in the entire source package are lower case, as they
10461 were in earlier releases.
10463 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
10466 Fixed an issue with the Windows version of the compiler where later
10468 of Windows place the FADT in the registry under the name "FADT" and not
10469 "FACP" as earlier versions did. This applies when using the -g or -
10470 d<nofilename> options. The compiler now looks for both strings as
10473 Fixed a problem with compiler namepath optimization where a namepath
10475 the Scope() operator could not be optimized if the namepath was a subpath
10477 the current scope path.
10479 ----------------------------------------
10480 27 May 2004. Summary of changes for version 20040527:
10482 1) ACPI CA Core Subsystem:
10484 Completed a new design and implementation for EBDA (Extended BIOS Data
10486 support in the RSDP scan code. The original code improperly scanned for
10488 EBDA by simply scanning from memory location 0 to 0x400. The correct
10490 is to first obtain the EBDA pointer from within the BIOS data area, then
10491 scan 1K of memory starting at the EBDA pointer. There appear to be few
10493 any machines that place the RSDP in the EBDA, however.
10495 Integrated a fix for a possible fault during evaluation of BufferField
10496 arguments. Obsolete code that was causing the problem was removed.
10498 Found and fixed a problem in the Field Support Code where data could be
10499 corrupted on a bit field read that starts on an aligned boundary but does
10500 not end on an aligned boundary. Merged the read/write "datum length"
10501 calculation code into a common procedure.
10503 Rolled in a couple of changes to the FreeBSD-specific header.
10506 Code and Data Size: Current and previous core subsystem library sizes are
10507 shown below. These are the code and data sizes for the acpica.lib
10509 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10510 any ACPI driver or OSPM code. The debug version of the code includes the
10511 debug output trace mechanism and has a much larger code and data size.
10513 that these values will vary depending on the efficiency of the compiler
10515 the compiler options used during generation.
10518 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
10519 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
10521 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
10522 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
10525 2) iASL Compiler/Disassembler:
10527 Fixed a generation warning produced by some overly-verbose compilers for
10531 ----------------------------------------
10532 14 May 2004. Summary of changes for version 20040514:
10534 1) ACPI CA Core Subsystem:
10536 Fixed a problem where hardware GPE enable bits sometimes not set properly
10537 during and after GPE method execution. Result of 04/27 changes.
10539 Removed extra "clear all GPEs" when sleeping/waking.
10541 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
10542 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above
10544 the new AcpiEv* calls as appropriate.
10546 ACPI_OS_NAME was removed from the OS-specific headers. The default name
10548 now "Microsoft Windows NT" for maximum compatibility. However this can
10550 changed by modifying the acconfig.h file.
10552 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
10553 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
10555 Run _INI methods on ThermalZone objects. This is against the ACPI
10556 specification, but there is apparently ASL code in the field that has
10558 _INI methods, and apparently "other" AML interpreters execute them.
10560 Performed a full 16/32/64 bit lint that resulted in some small changes.
10562 Added a sleep simulation command to the AML debugger to test sleep code.
10564 Code and Data Size: Current and previous core subsystem library sizes are
10565 shown below. These are the code and data sizes for the acpica.lib
10567 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10568 any ACPI driver or OSPM code. The debug version of the code includes the
10569 debug output trace mechanism and has a much larger code and data size.
10571 that these values will vary depending on the efficiency of the compiler
10573 the compiler options used during generation.
10576 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
10577 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
10579 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
10580 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
10582 ----------------------------------------
10583 27 April 2004. Summary of changes for version 20040427:
10585 1) ACPI CA Core Subsystem:
10587 Completed a major overhaul of the GPE handling within ACPI CA. There are
10588 now three types of GPEs: wake-only, runtime-only, and combination
10590 The only GPEs allowed to be combination wake/run are for button-style
10591 devices such as a control-method power button, control-method sleep
10593 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are
10595 referenced by any _PRW methods are marked for "runtime" and hardware
10596 enabled. Any GPE that is referenced by a _PRW method is marked for
10598 (and disabled at runtime). However, at sleep time, only those GPEs that
10599 have been specifically enabled for wake via the AcpiEnableGpe interface
10601 actually be hardware enabled.
10603 A new external interface has been added, AcpiSetGpeType(), that is meant
10605 be used by device drivers to force a GPE to a particular type. It will
10607 especially useful for the drivers for the button devices mentioned above.
10609 Completed restructuring of the ACPI CA initialization sequence so that
10610 default operation region handlers are installed before GPEs are
10612 and the _PRW methods are executed. This will prevent errors when the
10614 methods attempt to access system memory or I/O space.
10616 GPE enable/disable no longer reads the GPE enable register. We now keep
10618 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
10619 thus no longer depend on the hardware to maintain these bits.
10621 Always clear the wake status and fixed/GPE status bits before sleep, even
10624 Improved the AML debugger output for displaying the GPE blocks and their
10627 Added new strings for the _OSI method, of the form "Windows 2001 SPx"
10631 Fixed a problem where the physical address was incorrectly calculated
10633 the Load() operator was used to directly load from an Operation Region
10635 loading from a Field object.) Also added check for minimum table length
10639 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
10642 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
10643 consistency with the other fields returned.
10645 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
10646 structure for each GPE in the system, so the size of this structure is
10649 CPU stack requirement reduction: Cleaned up the method execution and
10651 evaluation paths so that now a parameter structure is passed, instead of
10652 copying the various method parameters over and over again.
10654 In evregion.c: Correctly exit and reenter the interpreter region if and
10655 only if dispatching an operation region request to a user-installed
10657 Do not exit/reenter when dispatching to a default handler (e.g., default
10658 system memory or I/O handlers)
10661 Notes for updating drivers for the new GPE support. The following
10663 must be made to ACPI-related device drivers that are attached to one or
10665 GPEs: (This information will be added to the ACPI CA Programmer
10668 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you
10670 explicitly call AcpiEnableGpe.
10671 2) There is a new interface called AcpiSetGpeType. This should be called
10672 before enabling the GPE. Also, this interface will automatically disable
10673 the GPE if it is currently enabled.
10674 3) AcpiEnableGpe no longer supports a GPE type flag.
10676 Specific drivers that must be changed:
10678 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
10679 AeGpeHandler, NULL);
10680 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
10681 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
10683 2) Button Drivers (Power, Lid, Sleep):
10684 Run _PRW method under parent device
10685 If _PRW exists: /* This is a control-method button */
10686 Extract GPE number and possibly GpeDevice
10687 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
10688 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
10690 For all other devices that have _PRWs, we automatically set the GPE type
10692 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled.
10694 must be done on a selective basis, usually requiring some kind of user
10696 to allow the user to pick the wake devices.
10699 Code and Data Size: Current and previous core subsystem library sizes are
10700 shown below. These are the code and data sizes for the acpica.lib
10702 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10703 any ACPI driver or OSPM code. The debug version of the code includes the
10704 debug output trace mechanism and has a much larger code and data size.
10706 that these values will vary depending on the efficiency of the compiler
10708 the compiler options used during generation.
10711 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
10712 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
10715 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
10716 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
10720 ----------------------------------------
10721 02 April 2004. Summary of changes for version 20040402:
10723 1) ACPI CA Core Subsystem:
10725 Fixed an interpreter problem where an indirect store through an ArgX
10726 parameter was incorrectly applying the "implicit conversion rules" during
10727 the store. From the ACPI specification: "If the target is a method local
10729 argument (LocalX or ArgX), no conversion is performed and the result is
10730 stored directly to the target". The new behavior is to disable implicit
10731 conversion during ALL stores to an ArgX.
10733 Changed the behavior of the _PRW method scan to ignore any and all errors
10734 returned by a given _PRW. This prevents the scan from aborting from the
10735 failure of any single _PRW.
10737 Moved the runtime configuration parameters from the global init procedure
10739 static variables in acglobal.h. This will allow the host to override the
10740 default values easily.
10742 Code and Data Size: Current and previous core subsystem library sizes are
10743 shown below. These are the code and data sizes for the acpica.lib
10745 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10746 any ACPI driver or OSPM code. The debug version of the code includes the
10747 debug output trace mechanism and has a much larger code and data size.
10749 that these values will vary depending on the efficiency of the compiler
10751 the compiler options used during generation.
10754 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
10755 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
10757 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
10758 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
10761 2) iASL Compiler/Disassembler:
10763 iASL now fully disassembles SSDTs. However, External() statements are
10765 generated automatically for unresolved symbols at this time. This is a
10766 planned feature for future implementation.
10768 Fixed a scoping problem in the disassembler that occurs when the type of
10770 target of a Scope() operator is overridden. This problem caused an
10771 incorrectly nested internal namespace to be constructed.
10773 Any warnings or errors that are emitted during disassembly are now
10775 out automatically so that the resulting file can be recompiled without
10779 ----------------------------------------
10780 26 March 2004. Summary of changes for version 20040326:
10782 1) ACPI CA Core Subsystem:
10784 Implemented support for "wake" GPEs via interaction between GPEs and the
10785 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
10786 identified as a WAKE GPE and by default will no longer be enabled at
10787 runtime. Previously, we were blindly enabling all GPEs with a
10789 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.
10791 believe this has been the cause of thousands of "spurious" GPEs on some
10794 This new GPE behavior is can be reverted to the original behavior (enable
10795 ALL GPEs at runtime) via a runtime flag.
10797 Fixed a problem where aliased control methods could not access objects
10798 properly. The proper scope within the namespace was not initialized
10799 (transferred to the target of the aliased method) before executing the
10802 Fixed a potential race condition on internal object deletion on the
10804 object in AcpiEvaluateObject.
10806 Integrated a fix for resource descriptors where both _MEM and _MTP were
10807 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
10808 wide, 0x0F instead of 0x03.)
10810 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName,
10813 fault in some cases.
10815 Updated Notify() values for debug statements in evmisc.c
10817 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
10819 Code and Data Size: Current and previous core subsystem library sizes are
10820 shown below. These are the code and data sizes for the acpica.lib
10822 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10823 any ACPI driver or OSPM code. The debug version of the code includes the
10824 debug output trace mechanism and has a much larger code and data size.
10826 that these values will vary depending on the efficiency of the compiler
10828 the compiler options used during generation.
10832 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
10833 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
10835 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
10836 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
10838 ----------------------------------------
10839 11 March 2004. Summary of changes for version 20040311:
10841 1) ACPI CA Core Subsystem:
10843 Fixed a problem where errors occurring during the parse phase of control
10844 method execution did not abort cleanly. For example, objects created and
10845 installed in the namespace were not deleted. This caused all subsequent
10846 invocations of the method to return the AE_ALREADY_EXISTS exception.
10848 Implemented a mechanism to force a control method to "Serialized"
10850 if the method attempts to create namespace objects. (The root of the
10851 AE_ALREADY_EXISTS problem.)
10853 Implemented support for the predefined _OSI "internal" control method.
10854 Initial supported strings are "Linux", "Windows 2000", "Windows 2001",
10856 "Windows 2001.1", and can be easily upgraded for new strings as
10858 This feature will allow "other" operating systems to execute the fully
10859 tested, "Windows" code path through the ASL code
10861 Global Lock Support: Now allows multiple acquires and releases with any
10862 internal thread. Removed concept of "owning thread" for this special
10865 Fixed two functions that were inappropriately declaring large objects on
10867 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage
10869 method execution considerably.
10871 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
10872 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
10874 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
10875 defined on the machine.
10877 Implemented two runtime options: One to force all control method
10879 to "Serialized" to mimic Windows behavior, another to disable _OSI
10881 if it causes problems on a given machine.
10883 Code and Data Size: Current and previous core subsystem library sizes are
10884 shown below. These are the code and data sizes for the acpica.lib
10886 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10887 any ACPI driver or OSPM code. The debug version of the code includes the
10888 debug output trace mechanism and has a much larger code and data size.
10890 that these values will vary depending on the efficiency of the compiler
10892 the compiler options used during generation.
10895 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
10896 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
10898 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
10899 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
10901 2) iASL Compiler/Disassembler:
10903 Fixed an array size problem for FreeBSD that would cause the compiler to
10906 ----------------------------------------
10907 20 February 2004. Summary of changes for version 20040220:
10910 1) ACPI CA Core Subsystem:
10912 Implemented execution of _SxD methods for Device objects in the
10913 GetObjectInfo interface.
10915 Fixed calls to _SST method to pass the correct arguments.
10917 Added a call to _SST on wake to restore to "working" state.
10919 Check for End-Of-Buffer failure case in the WalkResources interface.
10921 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
10922 structures to the beginning of the file.
10924 After wake, clear GPE status register(s) before enabling GPEs.
10926 After wake, clear/enable power button. (Perhaps we should clear/enable
10928 fixed events upon wake.)
10930 Fixed a couple of possible memory leaks in the Namespace manager.
10932 Integrated latest acnetbsd.h file.
10934 ----------------------------------------
10935 11 February 2004. Summary of changes for version 20040211:
10938 1) ACPI CA Core Subsystem:
10940 Completed investigation and implementation of the call-by-reference
10941 mechanism for control method arguments.
10943 Fixed a problem where a store of an object into an indexed package could
10944 fail if the store occurs within a different method than the method that
10945 created the package.
10947 Fixed a problem where the ToDecimal operator could return incorrect
10950 Fixed a problem where the CopyObject operator could fail on some of the
10952 obscure objects (e.g., Reference objects.)
10954 Improved the output of the Debug object to display buffer, package, and
10957 Fixed a problem where constructs of the form "RefOf (ArgX)" did not
10959 the expected result.
10961 Added permanent ACPI_REPORT_ERROR macros for all instances of the
10962 ACPI_AML_INTERNAL exception.
10964 Integrated latest version of acfreebsd.h
10966 ----------------------------------------
10967 16 January 2004. Summary of changes for version 20040116:
10969 The purpose of this release is primarily to update the copyright years in
10970 each module, thus causing a huge number of diffs. There are a few small
10971 functional changes, however.
10973 1) ACPI CA Core Subsystem:
10975 Improved error messages when there is a problem finding one or more of
10977 required base ACPI tables
10979 Reintroduced the definition of APIC_HEADER in actbl.h
10981 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
10983 Removed extraneous reference to NewObj in dsmthdat.c
10987 Fixed a problem introduced in December that disabled the correct
10989 of Resource Templates
10992 ----------------------------------------
10993 03 December 2003. Summary of changes for version 20031203:
10995 1) ACPI CA Core Subsystem:
10997 Changed the initialization of Operation Regions during subsystem
10998 init to perform two entire walks of the ACPI namespace; The first
10999 to initialize the regions themselves, the second to execute the
11000 _REG methods. This fixed some interdependencies across _REG
11001 methods found on some machines.
11003 Fixed a problem where a Store(Local0, Local1) could simply update
11004 the object reference count, and not create a new copy of the
11005 object if the Local1 is uninitialized.
11007 Implemented support for the _SST reserved method during sleep
11010 Implemented support to clear the SLP_TYP and SLP_EN bits when
11011 waking up, this is apparently required by some machines.
11013 When sleeping, clear the wake status only if SleepState is not S5.
11015 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
11016 pointer arithmetic advanced a string pointer too far.
11018 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
11019 could be returned if the requested table has not been loaded.
11021 Within the support for IRQ resources, restructured the handling of
11022 the active and edge/level bits.
11024 Fixed a few problems in AcpiPsxExecute() where memory could be
11025 leaked under certain error conditions.
11027 Improved error messages for the cases where the ACPI mode could
11030 Code and Data Size: Current and previous core subsystem library
11031 sizes are shown below. These are the code and data sizes for the
11032 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
11033 these values do not include any ACPI driver or OSPM code. The
11034 debug version of the code includes the debug output trace
11035 mechanism and has a much larger code and data size. Note that
11036 these values will vary depending on the efficiency of the compiler
11037 and the compiler options used during generation.
11039 Previous Release (20031029):
11040 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
11041 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
11043 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
11044 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
11046 2) iASL Compiler/Disassembler:
11048 Implemented a fix for the iASL disassembler where a bad index was
11049 generated. This was most noticeable on 64-bit platforms
11052 ----------------------------------------
11053 29 October 2003. Summary of changes for version 20031029:
11055 1) ACPI CA Core Subsystem:
11058 Fixed a problem where a level-triggered GPE with an associated
11059 _Lxx control method was incorrectly cleared twice.
11061 Fixed a problem with the Field support code where an access can
11062 occur beyond the end-of-region if the field is non-aligned but
11063 extends to the very end of the parent region (resulted in an
11064 AE_AML_REGION_LIMIT exception.)
11066 Fixed a problem with ACPI Fixed Events where an RT Clock handler
11067 would not get invoked on an RTC event. The RTC event bitmasks for
11068 the PM1 registers were not being initialized properly.
11070 Implemented support for executing _STA and _INI methods for
11071 Processor objects. Although this is currently not part of the
11072 ACPI specification, there is existing ASL code that depends on the
11073 init-time execution of these methods.
11075 Implemented and deployed a GetDescriptorName function to decode
11076 the various types of internal descriptors. Guards against null
11077 descriptors during debug output also.
11079 Implemented and deployed a GetNodeName function to extract the 4-
11080 character namespace node name. This function simplifies the debug
11081 and error output, as well as guarding against null pointers during
11084 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
11085 simplify the debug and error output of 64-bit integers. This
11086 macro replaces the HIDWORD and LODWORD macros for dumping these
11089 Updated the implementation of the Stall() operator to only call
11090 AcpiOsStall(), and also return an error if the operand is larger
11091 than 255. This preserves the required behavior of not
11092 relinquishing the processor, as would happen if AcpiOsSleep() was
11093 called for "long stalls".
11095 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
11096 initialized are now treated as NOOPs.
11098 Cleaned up a handful of warnings during 64-bit generation.
11100 Fixed a reported error where and incorrect GPE number was passed
11101 to the GPE dispatch handler. This value is only used for error
11102 output, however. Used this opportunity to clean up and streamline
11103 the GPE dispatch code.
11105 Code and Data Size: Current and previous core subsystem library
11106 sizes are shown below. These are the code and data sizes for the
11107 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
11108 these values do not include any ACPI driver or OSPM code. The
11110 debug version of the code includes the debug output trace
11111 mechanism and has a much larger code and data size. Note that
11112 these values will vary depending on the efficiency of the compiler
11113 and the compiler options used during generation.
11115 Previous Release (20031002):
11116 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
11117 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
11119 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
11120 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
11123 2) iASL Compiler/Disassembler:
11125 Updated the iASL compiler to return an error if the operand to the
11126 Stall() operator is larger than 255.
11129 ----------------------------------------
11130 02 October 2003. Summary of changes for version 20031002:
11133 1) ACPI CA Core Subsystem:
11135 Fixed a problem with Index Fields where the index was not
11136 incremented for fields that require multiple writes to the
11137 index/data registers (Fields that are wider than the data
11140 Fixed a problem with all Field objects where a write could go
11141 beyond the end-of-field if the field was larger than the access
11142 granularity and therefore required multiple writes to complete the
11143 request. An extra write beyond the end of the field could happen
11146 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
11147 would incorrectly be returned if the width of the Data Register
11148 was larger than the specified field access width.
11150 Completed fixes for LoadTable() and Unload() and verified their
11151 operation. Implemented full support for the "DdbHandle" object
11152 throughout the ACPI CA subsystem.
11154 Implemented full support for the MADT and ECDT tables in the ACPI
11155 CA header files. Even though these tables are not directly
11156 consumed by ACPI CA, the header definitions are useful for ACPI
11159 Integrated resource descriptor fixes posted to the Linux ACPI
11160 list. This included checks for minimum descriptor length, and
11161 support for trailing NULL strings within descriptors that have
11162 optional string elements.
11164 Code and Data Size: Current and previous core subsystem library
11165 sizes are shown below. These are the code and data sizes for the
11166 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
11167 these values do not include any ACPI driver or OSPM code. The
11168 debug version of the code includes the debug output trace
11169 mechanism and has a much larger code and data size. Note that
11170 these values will vary depending on the efficiency of the compiler
11171 and the compiler options used during generation.
11173 Previous Release (20030918):
11174 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
11175 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
11177 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
11178 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
11183 Implemented detection of non-ASCII characters within the input
11184 source ASL file. This catches attempts to compile binary (AML)
11185 files early in the compile, with an informative error message.
11187 Fixed a problem where the disassembler would fault if the output
11188 filename could not be generated or if the output file could not be
11191 ----------------------------------------
11192 18 September 2003. Summary of changes for version 20030918:
11195 1) ACPI CA Core Subsystem:
11197 Found and fixed a longstanding problem with the late execution of
11198 the various deferred AML opcodes (such as Operation Regions,
11199 Buffer Fields, Buffers, and Packages). If the name string
11200 specified for the name of the new object placed the object in a
11201 scope other than the current scope, the initialization/execution
11202 of the opcode failed. The solution to this problem was to
11203 implement a mechanism where the late execution of such opcodes
11204 does not attempt to lookup/create the name a second time in an
11205 incorrect scope. This fixes the "region size computed
11206 incorrectly" problem.
11208 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
11209 Global Lock AE_BAD_PARAMETER error.
11211 Fixed several 64-bit issues with prototypes, casting and data
11214 Removed duplicate prototype from acdisasm.h
11216 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
11218 Code and Data Size: Current and previous core subsystem library
11219 sizes are shown below. These are the code and data sizes for the
11220 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
11221 these values do not include any ACPI driver or OSPM code. The
11222 debug version of the code includes the debug output trace
11223 mechanism and has a much larger code and data size. Note that
11224 these values will vary depending on the efficiency of the compiler
11225 and the compiler options used during generation.
11229 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
11230 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
11232 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
11233 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
11238 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
11239 correct sleep time in seconds.
11241 ----------------------------------------
11242 14 July 2003. Summary of changes for version 20030619:
11244 1) ACPI CA Core Subsystem:
11246 Parse SSDTs in order discovered, as opposed to reverse order
11249 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
11256 Dynamically allocate SDT list (suggested by Andi Kleen)
11258 proc function return value cleanups (Andi Kleen)
11260 Correctly handle NMI watchdog during long stalls (Andrew Morton)
11262 Make it so acpismp=force works (reported by Andrew Morton)
11265 ----------------------------------------
11266 19 June 2003. Summary of changes for version 20030619:
11268 1) ACPI CA Core Subsystem:
11270 Fix To/FromBCD, eliminating the need for an arch-specific #define.
11272 Do not acquire a semaphore in the S5 shutdown path.
11274 Fix ex_digits_needed for 0. (Takayoshi Kochi)
11276 Fix sleep/stall code reversal. (Andi Kleen)
11278 Revert a change having to do with control method calling
11283 acpiphp update (Takayoshi Kochi)
11285 Export acpi_disabled for sonypi (Stelian Pop)
11287 Mention acpismp=force in config help
11289 Re-add acpitable.c and acpismp=force. This improves backwards
11291 compatibility and also cleans up the code to a significant degree.
11293 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
11295 ----------------------------------------
11296 22 May 2003. Summary of changes for version 20030522:
11298 1) ACPI CA Core Subsystem:
11300 Found and fixed a reported problem where an AE_NOT_FOUND error
11301 occurred occasionally during _BST evaluation. This turned out to
11302 be an Owner ID allocation issue where a called method did not get
11303 a new ID assigned to it. Eventually, (after 64k calls), the Owner
11304 ID UINT16 would wraparound so that the ID would be the same as the
11305 caller's and the called method would delete the caller's
11308 Implemented extended error reporting for control methods that are
11309 aborted due to a run-time exception. Output includes the exact
11310 AML instruction that caused the method abort, a dump of the method
11311 locals and arguments at the time of the abort, and a trace of all
11312 nested control method calls.
11314 Modified the interpreter to allow the creation of buffers of zero
11315 length from the AML code. Implemented new code to ensure that no
11316 attempt is made to actually allocate a memory buffer (of length
11317 zero) - instead, a simple buffer object with a NULL buffer pointer
11318 and length zero is created. A warning is no longer issued when
11319 the AML attempts to create a zero-length buffer.
11321 Implemented a workaround for the "leading asterisk issue" in
11322 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
11323 asterisk is automatically removed if present in any HID, UID, or
11324 CID strings. The iASL compiler will still flag this asterisk as
11327 Implemented full support for _CID methods that return a package of
11328 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
11329 now additionally returns a device _CID list if present. This
11330 required a change to the external interface in order to pass an
11331 ACPI_BUFFER object as a parameter since the _CID list is of
11334 Fixed a problem with the new AE_SAME_HANDLER exception where
11335 handler initialization code did not know about this exception.
11337 Code and Data Size: Current and previous core subsystem library
11338 sizes are shown below. These are the code and data sizes for the
11339 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
11340 these values do not include any ACPI driver or OSPM code. The
11341 debug version of the code includes the debug output trace
11342 mechanism and has a much larger code and data size. Note that
11343 these values will vary depending on the efficiency of the compiler
11344 and the compiler options used during generation.
11346 Previous Release (20030509):
11347 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
11348 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
11350 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
11351 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
11356 Fixed a bug in which we would reinitialize the ACPI interrupt
11357 after it was already working, thus disabling all ACPI and the IRQs
11358 for any other device sharing the interrupt. (Thanks to Stian
11361 Toshiba driver update (John Belmonte)
11363 Return only 0 or 1 for our interrupt handler status (Andrew
11369 Fixed a reported problem where multiple (nested) ElseIf()
11370 statements were not handled correctly by the compiler, resulting
11371 in incorrect warnings and incorrect AML code. This was a problem
11372 in both the ASL parser and the code generator.
11377 Added changes to existing interfaces, new exception codes, and new
11378 text concerning reference count object management versus garbage
11381 ----------------------------------------
11382 09 May 2003. Summary of changes for version 20030509.
11385 1) ACPI CA Core Subsystem:
11387 Changed the subsystem initialization sequence to hold off
11388 installation of address space handlers until the hardware has been
11389 initialized and the system has entered ACPI mode. This is because
11390 the installation of space handlers can cause _REG methods to be
11391 run. Previously, the _REG methods could potentially be run before
11392 ACPI mode was enabled.
11394 Fixed some memory leak issues related to address space handler and
11395 notify handler installation. There were some problems with the
11396 reference count mechanism caused by the fact that the handler
11397 objects are shared across several namespace objects.
11399 Fixed a reported problem where reference counts within the
11400 namespace were not properly updated when named objects created by
11401 method execution were deleted.
11403 Fixed a reported problem where multiple SSDTs caused a deletion
11404 issue during subsystem termination. Restructured the table data
11405 structures to simplify the linked lists and the related code.
11407 Fixed a problem where the table ID associated with secondary
11408 tables (SSDTs) was not being propagated into the namespace objects
11409 created by those tables. This would only present a problem for
11410 tables that are unloaded at run-time, however.
11412 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
11413 type as the length parameter (instead of UINT32).
11415 Solved a long-standing problem where an ALREADY_EXISTS error
11416 appears on various systems. This problem could happen when there
11417 are multiple PCI_Config operation regions under a single PCI root
11418 bus. This doesn't happen very frequently, but there are some
11419 systems that do this in the ASL.
11421 Fixed a reported problem where the internal DeleteNode function
11422 was incorrectly handling the case where a namespace node was the
11423 first in the parent's child list, and had additional peers (not
11424 the only child, but first in the list of children.)
11426 Code and Data Size: Current core subsystem library sizes are shown
11427 below. These are the code and data sizes for the acpica.lib
11428 produced by the Microsoft Visual C++ 6.0 compiler, and these
11429 values do not include any ACPI driver or OSPM code. The debug
11430 version of the code includes the debug output trace mechanism and
11431 has a much larger code and data size. Note that these values will
11432 vary depending on the efficiency of the compiler and the compiler
11433 options used during generation.
11436 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
11437 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
11439 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
11440 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
11445 Allow ":" in OS override string (Ducrot Bruno)
11447 Kobject fix (Greg KH)
11450 3 iASL Compiler/Disassembler:
11452 Fixed a problem in the generation of the C source code files (AML
11453 is emitted in C source statements for BIOS inclusion) where the
11454 Ascii dump that appears within a C comment at the end of each line
11455 could cause a compile time error if the AML sequence happens to
11456 have an open comment or close comment sequence embedded.
11459 ----------------------------------------
11460 24 April 2003. Summary of changes for version 20030424.
11463 1) ACPI CA Core Subsystem:
11465 Support for big-endian systems has been implemented. Most of the
11466 support has been invisibly added behind big-endian versions of the
11467 ACPI_MOVE_* macros.
11469 Fixed a problem in AcpiHwDisableGpeBlock() and
11470 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
11471 low level hardware write routine. The offset parameter was
11472 actually eliminated from the low level read/write routines because
11473 they had become obsolete.
11475 Fixed a problem where a handler object was deleted twice during
11476 the removal of a fixed event handler.
11481 A fix for SMP systems with link devices was contributed by
11485 (2.5) Return whether we handled the interrupt in our IRQ handler.
11486 (Linux ISRs no longer return void, so we can propagate the handler
11487 return value from the ACPI CA core back to the OS.)
11493 The ACPI CA Programmer Reference has been updated to reflect new
11494 interfaces and changes to existing interfaces.
11496 ----------------------------------------
11497 28 March 2003. Summary of changes for version 20030328.
11499 1) ACPI CA Core Subsystem:
11501 The GPE Block Device support has been completed. New interfaces
11502 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
11503 interfaces (enable, disable, clear, getstatus) have been split
11504 into separate interfaces for Fixed Events and General Purpose
11505 Events (GPEs) in order to support GPE Block Devices properly.
11507 Fixed a problem where the error message "Failed to acquire
11508 semaphore" would appear during operations on the embedded
11511 Code and Data Size: Current core subsystem library sizes are shown
11512 below. These are the code and data sizes for the acpica.lib
11513 produced by the Microsoft Visual C++ 6.0 compiler, and these
11514 values do not include any ACPI driver or OSPM code. The debug
11515 version of the code includes the debug output trace mechanism and
11516 has a much larger code and data size. Note that these values will
11517 vary depending on the efficiency of the compiler and the compiler
11518 options used during generation.
11521 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
11522 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
11524 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
11525 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
11528 ----------------------------------------
11529 28 February 2003. Summary of changes for version 20030228.
11532 1) ACPI CA Core Subsystem:
11534 The GPE handling and dispatch code has been completely overhauled
11535 in preparation for support of GPE Block Devices (ID ACPI0006).
11536 This affects internal data structures and code only; there should
11537 be no differences visible externally. One new file has been
11540 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
11541 fields that are used to determine the GPE block lengths. The
11542 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
11543 structures are ignored. This is per the ACPI specification but it
11544 isn't very clear. The full 256 Block 0/1 GPEs are now supported
11545 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
11547 In the SCI interrupt handler, removed the read of the PM1_CONTROL
11548 register to look at the SCI_EN bit. On some machines, this read
11549 causes an SMI event and greatly slows down SCI events. (This may
11550 in fact be the cause of slow battery status response on some
11553 Fixed a problem where a store of a NULL string to a package object
11554 could cause the premature deletion of the object. This was seen
11555 during execution of the battery _BIF method on some systems,
11556 resulting in no battery data being returned.
11558 Added AcpiWalkResources interface to simplify parsing of resource
11561 Code and Data Size: Current core subsystem library sizes are shown
11562 below. These are the code and data sizes for the acpica.lib
11563 produced by the Microsoft Visual C++ 6.0 compiler, and these
11564 values do not include any ACPI driver or OSPM code. The debug
11565 version of the code includes the debug output trace mechanism and
11566 has a much larger code and data size. Note that these values will
11567 vary depending on the efficiency of the compiler and the compiler
11568 options used during generation.
11571 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
11572 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
11574 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
11575 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
11580 S3 fixes (Ole Rohne)
11582 Update ACPI PHP driver with to use new acpi_walk_resource API
11585 Add S4BIOS support (Pavel Machek)
11587 Map in entire table before performing checksum (John Stultz)
11589 Expand the mem= cmdline to allow the specification of reserved and
11590 ACPI DATA blocks (Pavel Machek)
11592 Never use ACPI on VISWS
11594 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
11596 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
11597 causing us to think that some systems support C2 when they really
11600 Do not count processor objects for non-present CPUs (Thanks to
11606 Fixed a problem where ASL include files could not be found and
11609 Added support for the _PDC reserved name.
11612 ----------------------------------------
11613 22 January 2003. Summary of changes for version 20030122.
11616 1) ACPI CA Core Subsystem:
11618 Added a check for constructs of the form: Store (Local0, Local0)
11619 where Local0 is not initialized. Apparently, some BIOS
11620 programmers believe that this is a NOOP. Since this store doesn't
11621 do anything anyway, the new prototype behavior will ignore this
11622 error. This is a case where we can relax the strict checking in
11623 the interpreter in the name of compatibility.
11628 The AcpiSrc Source Conversion Utility has been released with the
11629 Linux package for the first time. This is the utility that is
11630 used to convert the ACPI CA base source code to the Linux version.
11632 (Both) Handle P_BLK lengths shorter than 6 more gracefully
11634 (Both) Move more headers to include/acpi, and delete an unused
11637 (Both) Move drivers/acpi/include directory to include/acpi
11639 (Both) Boot functions don't use cmdline, so don't pass it around
11641 (Both) Remove include of unused header (Adrian Bunk)
11643 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
11645 former now also includes the latter, acpiphp.h only needs the one,
11648 (2.5) Make it possible to select method of bios restoring after S3
11649 resume. [=> no more ugly ifdefs] (Pavel Machek)
11651 (2.5) Make proc write interfaces work (Pavel Machek)
11653 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
11655 (2.5) Break out ACPI Perf code into its own module, under cpufreq
11656 (Dominik Brodowski)
11658 (2.4) S4BIOS support (Ducrot Bruno)
11660 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
11666 Added support to disassemble SSDT and PSDTs.
11668 Implemented support to obtain SSDTs from the Windows registry if
11672 ----------------------------------------
11673 09 January 2003. Summary of changes for version 20030109.
11675 1) ACPI CA Core Subsystem:
11677 Changed the behavior of the internal Buffer-to-String conversion
11678 function. The current ACPI specification states that the contents
11679 of the buffer are "converted to a string of two-character
11680 hexadecimal numbers, each separated by a space". Unfortunately,
11681 this definition is not backwards compatible with existing ACPI 1.0
11682 implementations (although the behavior was not defined in the ACPI
11683 1.0 specification). The new behavior simply copies data from the
11684 buffer to the string until a null character is found or the end of
11685 the buffer is reached. The new String object is always null
11686 terminated. This problem was seen during the generation of _BIF
11687 battery data where incorrect strings were returned for battery
11688 type, etc. This will also require an errata to the ACPI
11691 Renamed all instances of NATIVE_UINT and NATIVE_INT to
11692 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
11694 Copyright in all module headers (both Linux and non-Linux) has be
11697 Code and Data Size: Current core subsystem library sizes are shown
11698 below. These are the code and data sizes for the acpica.lib
11699 produced by the Microsoft Visual C++ 6.0 compiler, and these
11700 values do not include any ACPI driver or OSPM code. The debug
11701 version of the code includes the debug output trace mechanism and
11702 has a much larger code and data size. Note that these values will
11703 vary depending on the efficiency of the compiler and the compiler
11704 options used during generation.
11707 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
11708 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
11710 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
11711 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
11716 Fixed an oops on module insertion/removal (Matthew Tippett)
11718 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
11720 (2.5) Replace pr_debug (Randy Dunlap)
11722 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
11724 (Both) Eliminate spawning of thread from timer callback, in favor
11727 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
11729 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
11731 (Both) Add missing statics to button.c (Pavel Machek)
11733 Several changes have been made to the source code translation
11734 utility that generates the Linux Code in order to make the code
11737 All typedefs on structs and unions have been removed in keeping
11738 with the Linux coding style.
11740 Removed the non-Linux SourceSafe module revision number from each
11743 Completed major overhaul of symbols to be lowercased for linux.
11744 Doubled the number of symbols that are lowercased.
11746 Fixed a problem where identifiers within procedure headers and
11747 within quotes were not fully lower cased (they were left with a
11750 Some C macros whose only purpose is to allow the generation of 16-
11751 bit code are now completely removed in the Linux code, increasing
11752 readability and maintainability.
11754 ----------------------------------------
11756 12 December 2002. Summary of changes for version 20021212.
11759 1) ACPI CA Core Subsystem:
11761 Fixed a problem where the creation of a zero-length AML Buffer
11762 would cause a fault.
11764 Fixed a problem where a Buffer object that pointed to a static AML
11765 buffer (in an ACPI table) could inadvertently be deleted, causing
11768 Fixed a problem where a user buffer (passed in to the external
11769 ACPI CA interfaces) could be overwritten if the buffer was too
11770 small to complete the operation, causing memory corruption.
11772 Fixed a problem in the Buffer-to-String conversion code where a
11773 string of length one was always returned, regardless of the size
11774 of the input Buffer object.
11776 Removed the NATIVE_CHAR data type across the entire source due to
11777 lack of need and lack of consistent use.
11779 Code and Data Size: Current core subsystem library sizes are shown
11780 below. These are the code and data sizes for the acpica.lib
11781 produced by the Microsoft Visual C++ 6.0 compiler, and these
11782 values do not include any ACPI driver or OSPM code. The debug
11783 version of the code includes the debug output trace mechanism and
11784 has a much larger code and data size. Note that these values will
11785 vary depending on the efficiency of the compiler and the compiler
11786 options used during generation.
11789 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
11790 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
11792 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
11793 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
11796 ----------------------------------------
11797 05 December 2002. Summary of changes for version 20021205.
11799 1) ACPI CA Core Subsystem:
11801 Fixed a problem where a store to a String or Buffer object could
11802 cause corruption of the DSDT if the object type being stored was
11803 the same as the target object type and the length of the object
11804 being stored was equal to or smaller than the original (existing)
11805 target object. This was seen to cause corruption of battery _BIF
11806 buffers if the _BIF method modified the buffer on the fly.
11808 Fixed a problem where an internal error was generated if a control
11809 method invocation was used in an OperationRegion, Buffer, or
11810 Package declaration. This was caused by the deferred parsing of
11811 the control method and thus the deferred creation of the internal
11812 method object. The solution to this problem was to create the
11813 internal method object at the moment the method is encountered in
11814 the first pass - so that subsequent references to the method will
11815 able to obtain the required parameter count and thus properly
11816 parse the method invocation. This problem presented itself as an
11817 AE_AML_INTERNAL during the pass 1 parse phase during table load.
11819 Fixed a problem where the internal String object copy routine did
11820 not always allocate sufficient memory for the target String object
11821 and caused memory corruption. This problem was seen to cause
11822 "Allocation already present in list!" errors as memory allocation
11825 Implemented a new function for the evaluation of namespace objects
11826 that allows the specification of the allowable return object
11827 types. This simplifies a lot of code that checks for a return
11828 object of one or more specific objects returned from the
11829 evaluation (such as _STA, etc.) This may become and external
11830 function if it would be useful to ACPI-related drivers.
11832 Completed another round of prefixing #defines with "ACPI_" for
11835 Completed additional code restructuring to allow more modular
11836 linking for iASL compiler and AcpiExec. Several files were split
11837 creating new files. New files: nsparse.c dsinit.c evgpe.c
11839 Implemented an abort mechanism to terminate an executing control
11840 method via the AML debugger. This feature is useful for debugging
11841 control methods that depend (wait) for specific hardware
11844 Code and Data Size: Current core subsystem library sizes are shown
11845 below. These are the code and data sizes for the acpica.lib
11846 produced by the Microsoft Visual C++ 6.0 compiler, and these
11847 values do not include any ACPI driver or OSPM code. The debug
11848 version of the code includes the debug output trace mechanism and
11849 has a much larger code and data size. Note that these values will
11850 vary depending on the efficiency of the compiler and the compiler
11851 options used during generation.
11854 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
11855 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
11857 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
11858 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
11861 2) iASL Compiler/Disassembler
11863 Fixed a compiler code generation problem for "Interrupt" Resource
11864 Descriptors. If specified in the ASL, the optional "Resource
11865 Source Index" and "Resource Source" fields were not inserted into
11866 the correct location within the AML resource descriptor, creating
11867 an invalid descriptor.
11869 Fixed a disassembler problem for "Interrupt" resource descriptors.
11870 The optional "Resource Source Index" and "Resource Source" fields
11874 ----------------------------------------
11875 22 November 2002. Summary of changes for version 20021122.
11878 1) ACPI CA Core Subsystem:
11880 Fixed a reported problem where an object stored to a Method Local
11881 or Arg was not copied to a new object during the store - the
11882 object pointer was simply copied to the Local/Arg. This caused
11883 all subsequent operations on the Local/Arg to also affect the
11884 original source of the store operation.
11886 Fixed a problem where a store operation to a Method Local or Arg
11887 was not completed properly if the Local/Arg contained a reference
11888 (from RefOf) to a named field. The general-purpose store-to-
11889 namespace-node code is now used so that this case is handled
11892 Fixed a problem where the internal object copy routine would cause
11893 a protection fault if the object being copied was a Package and
11894 contained either 1) a NULL package element or 2) a nested sub-
11897 Fixed a problem with the GPE initialization that resulted from an
11898 ambiguity in the ACPI specification. One section of the
11899 specification states that both the address and length of the GPE
11900 block must be zero if the block is not supported. Another section
11901 implies that only the address need be zero if the block is not
11902 supported. The code has been changed so that both the address and
11903 the length must be non-zero to indicate a valid GPE block (i.e.,
11904 if either the address or the length is zero, the GPE block is
11907 Code and Data Size: Current core subsystem library sizes are shown
11908 below. These are the code and data sizes for the acpica.lib
11909 produced by the Microsoft Visual C++ 6.0 compiler, and these
11910 values do not include any ACPI driver or OSPM code. The debug
11911 version of the code includes the debug output trace mechanism and
11912 has a much larger code and data size. Note that these values will
11913 vary depending on the efficiency of the compiler and the compiler
11914 options used during generation.
11917 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
11918 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
11920 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
11921 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
11926 Cleaned up EC driver. Exported an external EC read/write
11927 interface. By going through this, other drivers (most notably
11928 sonypi) will be able to serialize access to the EC.
11931 3) iASL Compiler/Disassembler
11933 Implemented support to optionally generate include files for both
11934 ASM and C (the -i switch). This simplifies BIOS development by
11935 automatically creating include files that contain external
11936 declarations for the symbols that are created within the
11938 (optionally generated) ASM and C AML source files.
11941 ----------------------------------------
11942 15 November 2002. Summary of changes for version 20021115.
11944 1) ACPI CA Core Subsystem:
11946 Fixed a memory leak problem where an error during resolution of
11948 method arguments during a method invocation from another method
11949 failed to cleanup properly by deleting all successfully resolved
11952 Fixed a problem where the target of the Index() operator was not
11953 correctly constructed if the source object was a package. This
11954 problem has not been detected because the use of a target operand
11955 with Index() is very rare.
11957 Fixed a problem with the Index() operator where an attempt was
11958 made to delete the operand objects twice.
11960 Fixed a problem where an attempt was made to delete an operand
11961 twice during execution of the CondRefOf() operator if the target
11964 Implemented the first of perhaps several internal create object
11965 functions that create and initialize a specific object type. This
11966 consolidates duplicated code wherever the object is created, thus
11967 shrinking the size of the subsystem.
11969 Implemented improved debug/error messages for errors that occur
11970 during nested method invocations. All executing method pathnames
11971 are displayed (with the error) as the call stack is unwound - thus
11974 Fixed a problem introduced in the 10/02 release that caused
11975 premature deletion of a buffer object if a buffer was used as an
11976 ASL operand where an integer operand is required (Thus causing an
11977 implicit object conversion from Buffer to Integer.) The change in
11978 the 10/02 release was attempting to fix a memory leak (albeit
11981 Code and Data Size: Current core subsystem library sizes are shown
11982 below. These are the code and data sizes for the acpica.lib
11983 produced by the Microsoft Visual C++ 6.0 compiler, and these
11984 values do not include any ACPI driver or OSPM code. The debug
11985 version of the code includes the debug output trace mechanism and
11986 has a much larger code and data size. Note that these values will
11987 vary depending on the efficiency of the compiler and the compiler
11988 options used during generation.
11991 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
11992 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
11994 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
11995 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
12000 Changed the implementation of the ACPI semaphores to use down()
12001 instead of down_interruptable(). It is important that the
12002 execution of ACPI control methods not be interrupted by signals.
12003 Methods must run to completion, or the system may be left in an
12004 unknown/unstable state.
12006 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
12010 3) iASL Compiler/Disassembler
12013 Changed the default location of output files. All output files
12014 are now placed in the current directory by default instead of in
12015 the directory of the source file. This change may affect some
12016 existing makefiles, but it brings the behavior of the compiler in
12017 line with other similar tools. The location of the output files
12018 can be overridden with the -p command line switch.
12021 ----------------------------------------
12022 11 November 2002. Summary of changes for version 20021111.
12025 0) ACPI Specification 2.0B is released and is now available at:
12026 http://www.acpi.info/index.html
12029 1) ACPI CA Core Subsystem:
12031 Implemented support for the ACPI 2.0 SMBus Operation Regions.
12032 This includes the early detection and handoff of the request to
12033 the SMBus region handler (avoiding all of the complex field
12034 support code), and support for the bidirectional return packet
12035 from an SMBus write operation. This paves the way for the
12036 development of SMBus drivers in each host operating system.
12038 Fixed a problem where the semaphore WAIT_FOREVER constant was
12039 defined as 32 bits, but must be 16 bits according to the ACPI
12040 specification. This had the side effect of causing ASL
12041 Mutex/Event timeouts even though the ASL code requested a wait
12042 forever. Changed all internal references to the ACPI timeout
12043 parameter to 16 bits to prevent future problems. Changed the name
12044 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
12046 Code and Data Size: Current core subsystem library sizes are shown
12047 below. These are the code and data sizes for the acpica.lib
12048 produced by the Microsoft Visual C++ 6.0 compiler, and these
12049 values do not include any ACPI driver or OSPM code. The debug
12050 version of the code includes the debug output trace mechanism and
12051 has a much larger code and data size. Note that these values will
12052 vary depending on the efficiency of the compiler and the compiler
12053 options used during generation.
12056 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
12057 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
12059 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
12060 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
12065 Module loading/unloading fixes (John Cagle)
12068 3) iASL Compiler/Disassembler
12070 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
12072 Implemented support for the disassembly of all SMBus protocol
12073 keywords (SMBQuick, SMBWord, etc.)
12075 ----------------------------------------
12076 01 November 2002. Summary of changes for version 20021101.
12079 1) ACPI CA Core Subsystem:
12081 Fixed a problem where platforms that have a GPE1 block but no GPE0
12082 block were not handled correctly. This resulted in a "GPE
12083 overlap" error message. GPE0 is no longer required.
12085 Removed code added in the previous release that inserted nodes
12086 into the namespace in alphabetical order. This caused some side-
12087 effects on various machines. The root cause of the problem is
12088 still under investigation since in theory, the internal ordering
12089 of the namespace nodes should not matter.
12092 Enhanced error reporting for the case where a named object is not
12093 found during control method execution. The full ACPI namepath
12094 (name reference) of the object that was not found is displayed in
12097 Note: as a result of the overhaul of the namespace object types in
12098 the previous release, the namespace nodes for the predefined
12099 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
12100 instead of ACPI_TYPE_ANY. This simplifies the namespace
12101 management code but may affect code that walks the namespace tree
12102 looking for specific object types.
12104 Code and Data Size: Current core subsystem library sizes are shown
12105 below. These are the code and data sizes for the acpica.lib
12106 produced by the Microsoft Visual C++ 6.0 compiler, and these
12107 values do not include any ACPI driver or OSPM code. The debug
12108 version of the code includes the debug output trace mechanism and
12109 has a much larger code and data size. Note that these values will
12110 vary depending on the efficiency of the compiler and the compiler
12111 options used during generation.
12114 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
12115 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
12117 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
12118 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
12123 Fixed a problem introduced in the previous release where the
12124 Processor and Thermal objects were not recognized and installed in
12125 /proc. This was related to the scope type change described above.
12128 3) iASL Compiler/Disassembler
12130 Implemented the -g option to get all of the required ACPI tables
12131 from the registry and save them to files (Windows version of the
12132 compiler only.) The required tables are the FADT, FACS, and DSDT.
12134 Added ACPI table checksum validation during table disassembly in
12135 order to catch corrupted tables.
12138 ----------------------------------------
12139 22 October 2002. Summary of changes for version 20021022.
12141 1) ACPI CA Core Subsystem:
12143 Implemented a restriction on the Scope operator that the target
12144 must already exist in the namespace at the time the operator is
12145 encountered (during table load or method execution). In other
12146 words, forward references are not allowed and Scope() cannot
12147 create a new object. This changes the previous behavior where the
12148 interpreter would create the name if not found. This new behavior
12149 correctly enables the search-to-root algorithm during namespace
12150 lookup of the target name. Because of this upsearch, this fixes
12151 the known Compaq _SB_.OKEC problem and makes both the AML
12152 interpreter and iASL compiler compatible with other ACPI
12155 Completed a major overhaul of the internal ACPI object types for
12156 the ACPI Namespace and the associated operand objects. Many of
12157 these types had become obsolete with the introduction of the two-
12158 pass namespace load. This cleanup simplifies the code and makes
12159 the entire namespace load mechanism much clearer and easier to
12162 Improved debug output for tracking scope opening/closing to help
12163 diagnose scoping issues. The old scope name as well as the new
12164 scope name are displayed. Also improved error messages for
12165 problems with ASL Mutex objects and error messages for GPE
12168 Cleaned up the namespace dump code, removed obsolete code.
12170 All string output (for all namespace/object dumps) now uses the
12171 common ACPI string output procedure which handles escapes properly
12172 and does not emit non-printable characters.
12174 Fixed some issues with constants in the 64-bit version of the
12175 local C library (utclib.c)
12180 EC Driver: No longer attempts to acquire the Global Lock at
12184 3) iASL Compiler/Disassembler
12186 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
12187 2 opcodes outside of a control method. This means that the
12188 "executable" operators (versus the "namespace" operators) cannot
12189 be used at the table level; they can only be used within a control
12192 Implemented the restriction on the Scope() operator where the
12193 target must already exist in the namespace at the time the
12194 operator is encountered (during ASL compilation). In other words,
12195 forward references are not allowed and Scope() cannot create a new
12196 object. This makes the iASL compiler compatible with other ACPI
12197 implementations and makes the Scope() implementation adhere to the
12198 ACPI specification.
12200 Fixed a problem where namepath optimization for the Alias operator
12201 was optimizing the wrong path (of the two namepaths.) This caused
12202 a "Missing alias link" error message.
12204 Fixed a problem where an "unknown reserved name" warning could be
12205 incorrectly generated for names like "_SB" when the trailing
12206 underscore is not used in the original ASL.
12208 Fixed a problem where the reserved name check did not handle
12209 NamePaths with multiple NameSegs correctly. The first nameseg of
12210 the NamePath was examined instead of the last NameSeg.
12213 ----------------------------------------
12215 02 October 2002. Summary of changes for this release.
12218 1) ACPI CA Core Subsystem version 20021002:
12220 Fixed a problem where a store/copy of a string to an existing
12221 string did not always set the string length properly in the String
12224 Fixed a reported problem with the ToString operator where the
12225 behavior was identical to the ToHexString operator instead of just
12226 simply converting a raw buffer to a string data type.
12228 Fixed a problem where CopyObject and the other "explicit"
12229 conversion operators were not updating the internal namespace node
12230 type as part of the store operation.
12232 Fixed a memory leak during implicit source operand conversion
12233 where the original object was not deleted if it was converted to a
12234 new object of a different type.
12236 Enhanced error messages for all problems associated with namespace
12237 lookups. Common procedure generates and prints the lookup name as
12238 well as the formatted status.
12240 Completed implementation of a new design for the Alias support
12241 within the namespace. The existing design did not handle the case
12242 where a new object was assigned to one of the two names due to the
12243 use of an explicit conversion operator, resulting in the two names
12244 pointing to two different objects. The new design simply points
12245 the Alias name to the original name node - not to the object.
12246 This results in a level of indirection that must be handled in the
12247 name resolution mechanism.
12249 Code and Data Size: Current core subsystem library sizes are shown
12250 below. These are the code and data sizes for the acpica.lib
12251 produced by the Microsoft Visual C++ 6.0 compiler, and these
12252 values do not include any ACPI driver or OSPM code. The debug
12253 version of the code includes the debug output trace mechanism and
12254 has a larger code and data size. Note that these values will vary
12255 depending on the efficiency of the compiler and the compiler
12256 options used during generation.
12259 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
12260 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
12262 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
12263 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
12268 Initialize thermal driver's timer before it is used. (Knut
12271 Allow handling negative celsius values. (Kochi Takayoshi)
12273 Fix thermal management and make trip points. R/W (Pavel Machek)
12275 Fix /proc/acpi/sleep. (P. Christeas)
12277 IA64 fixes. (David Mosberger)
12279 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
12281 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
12285 3) iASL Compiler/Disassembler
12287 Clarified some warning/error messages.
12290 ----------------------------------------
12291 18 September 2002. Summary of changes for this release.
12294 1) ACPI CA Core Subsystem version 20020918:
12296 Fixed a reported problem with reference chaining (via the Index()
12297 and RefOf() operators) in the ObjectType() and SizeOf() operators.
12298 The definition of these operators includes the dereferencing of
12299 all chained references to return information on the base object.
12301 Fixed a problem with stores to indexed package elements - the
12302 existing code would not complete the store if an "implicit
12303 conversion" was not performed. In other words, if the existing
12304 object (package element) was to be replaced completely, the code
12305 didn't handle this case.
12307 Relaxed typechecking on the ASL "Scope" operator to allow the
12308 target name to refer to an object of type Integer, String, or
12309 Buffer, in addition to the scoping object types (Device,
12310 predefined Scopes, Processor, PowerResource, and ThermalZone.)
12311 This allows existing AML code that has workarounds for a bug in
12312 Windows to function properly. A warning is issued, however. This
12313 affects both the AML interpreter and the iASL compiler. Below is
12314 an example of this type of ASL code:
12320 Fixed some reported problems with 64-bit integer support in the
12321 local implementation of C library functions (clib.c)
12326 Use ACPI fix map region instead of IOAPIC region, since it is
12327 undefined in non-SMP.
12329 Ensure that the SCI has the proper polarity and trigger, even on
12330 systems that do not have an interrupt override entry in the MADT.
12332 2.5 big driver reorganization (Pat Mochel)
12334 Use early table mapping code from acpitable.c (Andi Kleen)
12336 New blacklist entries (Andi Kleen)
12338 Blacklist improvements. Split blacklist code out into a separate
12339 file. Move checking the blacklist to very early. Previously, we
12340 would use ACPI tables, and then halfway through init, check the
12341 blacklist -- too late. Now, it's early enough to completely fall-
12345 3) iASL Compiler/Disassembler version 20020918:
12347 Fixed a problem where the typechecking code didn't know that an
12348 alias could point to a method. In other words, aliases were not
12349 being dereferenced during typechecking.
12352 ----------------------------------------
12353 29 August 2002. Summary of changes for this release.
12355 1) ACPI CA Core Subsystem Version 20020829:
12357 If the target of a Scope() operator already exists, it must be an
12358 object type that actually opens a scope -- such as a Device,
12359 Method, Scope, etc. This is a fatal runtime error. Similar error
12360 check has been added to the iASL compiler also.
12362 Tightened up the namespace load to disallow multiple names in the
12363 same scope. This previously was allowed if both objects were of
12364 the same type. (i.e., a lookup was the same as entering a new
12370 Ensure that the ACPI interrupt has the proper trigger and
12373 local_irq_disable is extraneous. (Matthew Wilcox)
12375 Make "acpi=off" actually do what it says, and not use the ACPI
12376 interpreter *or* the tables.
12378 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
12382 3) iASL Compiler/Disassembler Version 20020829:
12384 Implemented namepath optimization for name declarations. For
12385 example, a declaration like "Method (\_SB_.ABCD)" would get
12386 optimized to "Method (ABCD)" if the declaration is within the
12387 \_SB_ scope. This optimization is in addition to the named
12388 reference path optimization first released in the previous
12389 version. This would seem to complete all possible optimizations
12390 for namepaths within the ASL/AML.
12392 If the target of a Scope() operator already exists, it must be an
12393 object type that actually opens a scope -- such as a Device,
12394 Method, Scope, etc.
12396 Implemented a check and warning for unreachable code in the same
12397 block below a Return() statement.
12399 Fixed a problem where the listing file was not generated if the
12400 compiler aborted if the maximum error count was exceeded (200).
12402 Fixed a problem where the typechecking of method return values was
12403 broken. This includes the check for a return value when the
12404 method is invoked as a TermArg (a return value is expected.)
12406 Fixed a reported problem where EOF conditions during a quoted
12407 string or comment caused a fault.
12410 ----------------------------------------
12411 15 August 2002. Summary of changes for this release.
12413 1) ACPI CA Core Subsystem Version 20020815:
12415 Fixed a reported problem where a Store to a method argument that
12416 contains a reference did not perform the indirect store correctly.
12417 This problem was created during the conversion to the new
12418 reference object model - the indirect store to a method argument
12419 code was not updated to reflect the new model.
12421 Reworked the ACPI mode change code to better conform to ACPI 2.0,
12422 handle corner cases, and improve code legibility (Kochi Takayoshi)
12424 Fixed a problem with the pathname parsing for the carat (^)
12425 prefix. The heavy use of the carat operator by the new namepath
12426 optimization in the iASL compiler uncovered a problem with the AML
12427 interpreter handling of this prefix. In the case where one or
12428 more carats precede a single nameseg, the nameseg was treated as
12429 standalone and the search rule (to root) was inadvertently
12430 applied. This could cause both the iASL compiler and the
12431 interpreter to find the wrong object or to miss the error that
12432 should occur if the object does not exist at that exact pathname.
12434 Found and fixed the problem where the HP Pavilion DSDT would not
12435 load. This was a relatively minor tweak to the table loading code
12436 (a problem caused by the unexpected encounter with a method
12437 invocation not within a control method), but it does not solve the
12438 overall issue of the execution of AML code at the table level.
12439 This investigation is still ongoing.
12441 Code and Data Size: Current core subsystem library sizes are shown
12442 below. These are the code and data sizes for the acpica.lib
12443 produced by the Microsoft Visual C++ 6.0 compiler, and these
12444 values do not include any ACPI driver or OSPM code. The debug
12445 version of the code includes the debug output trace mechanism and
12446 has a larger code and data size. Note that these values will vary
12447 depending on the efficiency of the compiler and the compiler
12448 options used during generation.
12451 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
12452 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
12454 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
12455 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
12460 Remove redundant slab.h include (Brad Hards)
12462 Fix several bugs in thermal.c (Herbert Nachtnebel)
12464 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
12466 Change acpi_system_suspend to use updated irq functions (Pavel
12469 Export acpi_get_firmware_table (Matthew Wilcox)
12471 Use proper root proc entry for ACPI (Kochi Takayoshi)
12473 Fix early-boot table parsing (Bjorn Helgaas)
12476 3) iASL Compiler/Disassembler
12478 Reworked the compiler options to make them more consistent and to
12479 use two-letter options where appropriate. We were running out of
12480 sensible letters. This may break some makefiles, so check the
12481 current options list by invoking the compiler with no parameters.
12483 Completed the design and implementation of the ASL namepath
12484 optimization option for the compiler. This option optimizes all
12485 references to named objects to the shortest possible path. The
12486 first attempt tries to utilize a single nameseg (4 characters) and
12487 the "search-to-root" algorithm used by the interpreter. If that
12488 cannot be used (because either the name is not in the search path
12489 or there is a conflict with another object with the same name),
12490 the pathname is optimized using the carat prefix (usually a
12491 shorter string than specifying the entire path from the root.)
12493 Implemented support to obtain the DSDT from the Windows registry
12494 (when the disassembly option is specified with no input file).
12495 Added this code as the implementation for AcpiOsTableOverride in
12496 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
12497 utility) to scan memory for the DSDT to the AcpiOsTableOverride
12498 function in the DOS OSL to make the disassembler truly OS
12501 Implemented a new option to disassemble and compile in one step.
12502 When used without an input filename, this option will grab the
12503 DSDT from the local machine, disassemble it, and compile it in one
12506 Added a warning message for invalid escapes (a backslash followed
12507 by any character other than the allowable escapes). This catches
12508 the quoted string error "\_SB_" (which should be "\\_SB_" ).
12510 Also, there are numerous instances in the ACPI specification where
12513 Added a compiler option to disable all optimizations. This is
12514 basically the "compatibility mode" because by using this option,
12515 the AML code will come out exactly the same as other ASL
12518 Added error messages for incorrectly ordered dependent resource
12519 functions. This includes: missing EndDependentFn macro at end of
12520 dependent resource list, nested dependent function macros (both
12521 start and end), and missing StartDependentFn macro. These are
12522 common errors that should be caught at compile time.
12524 Implemented _OSI support for the disassembler and compiler. _OSI
12525 must be included in the namespace for proper disassembly (because
12526 the disassembler must know the number of arguments.)
12528 Added an "optimization" message type that is optional (off by
12529 default). This message is used for all optimizations - including
12530 constant folding, integer optimization, and namepath optimization.
12532 ----------------------------------------
12533 25 July 2002. Summary of changes for this release.
12536 1) ACPI CA Core Subsystem Version 20020725:
12538 The AML Disassembler has been enhanced to produce compilable ASL
12539 code and has been integrated into the iASL compiler (see below) as
12540 well as the single-step disassembly for the AML debugger and the
12541 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
12542 resource templates and macros are fully supported. The
12543 disassembler has been tested on over 30 different AML files,
12544 producing identical AML when the resulting disassembled ASL file
12545 is recompiled with the same ASL compiler.
12547 Modified the Resource Manager to allow zero interrupts and zero
12548 dma channels during the GetCurrentResources call. This was
12549 causing problems on some platforms.
12551 Added the AcpiOsRedirectOutput interface to the OSL to simplify
12552 output redirection for the AcpiOsPrintf and AcpiOsVprintf
12555 Code and Data Size: Current core subsystem library sizes are shown
12556 below. These are the code and data sizes for the acpica.lib
12557 produced by the Microsoft Visual C++ 6.0 compiler, and these
12558 values do not include any ACPI driver or OSPM code. The debug
12559 version of the code includes the debug output trace mechanism and
12560 has a larger code and data size. Note that these values will vary
12561 depending on the efficiency of the compiler and the compiler
12562 options used during generation.
12565 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
12566 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
12568 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
12569 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
12574 Fixed a panic in the EC driver (Dominik Brodowski)
12576 Implemented checksum of the R/XSDT itself during Linux table scan
12582 The AML disassembler is integrated into the compiler. The "-d"
12583 option invokes the disassembler to completely disassemble an
12584 input AML file, producing as output a text ASL file with the
12585 extension ".dsl" (to avoid name collisions with existing .asl
12586 source files.) A future enhancement will allow the disassembler
12587 to obtain the BIOS DSDT from the registry under Windows.
12589 Fixed a problem with the VendorShort and VendorLong resource
12590 descriptors where an invalid AML sequence was created.
12592 Implemented a fix for BufferData term in the ASL parser. It was
12593 inadvertently defined twice, allowing invalid syntax to pass and
12594 causing reduction conflicts.
12596 Fixed a problem where the Ones opcode could get converted to a
12597 value of zero if "Ones" was used where a byte, word or dword value
12598 was expected. The 64-bit value is now truncated to the correct
12599 size with the correct value.
12603 ----------------------------------------
12604 02 July 2002. Summary of changes for this release.
12607 1) ACPI CA Core Subsystem Version 20020702:
12609 The Table Manager code has been restructured to add several new
12610 features. Tables that are not required by the core subsystem
12611 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
12612 validated in any way and are returned from AcpiGetFirmwareTable if
12613 requested. The AcpiOsTableOverride interface is now called for
12614 each table that is loaded by the subsystem in order to allow the
12615 host to override any table it chooses. Previously, only the DSDT
12616 could be overridden. Added one new files, tbrsdt.c and
12619 Fixed a problem with the conversion of internal package objects to
12620 external objects (when a package is returned from a control
12621 method.) The return buffer length was set to zero instead of the
12622 proper length of the package object.
12624 Fixed a reported problem with the use of the RefOf and DeRefOf
12625 operators when passing reference arguments to control methods. A
12626 new type of Reference object is used internally for references
12627 produced by the RefOf operator.
12629 Added additional error messages in the Resource Manager to explain
12630 AE_BAD_DATA errors when they occur during resource parsing.
12632 Split the AcpiEnableSubsystem into two primitives to enable a
12633 finer granularity initialization sequence. These two calls should
12634 be called in this order: AcpiEnableSubsystem (flags),
12635 AcpiInitializeObjects (flags). The flags parameter remains the
12641 Updated the ACPI utilities module to understand the new style of
12642 fully resolved package objects that are now returned from the core
12643 subsystem. This eliminates errors of the form:
12645 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
12646 acpi_utils-0430 [145] acpi_evaluate_reference:
12647 Invalid element in package (not a device reference)
12649 The method evaluation utility uses the new buffer allocation
12650 scheme instead of calling AcpiEvaluate Object twice.
12652 Added support for ECDT. This allows the use of the Embedded
12654 Controller before the namespace has been fully initialized, which
12655 is necessary for ACPI 2.0 support, and for some laptops to
12656 initialize properly. (Laptops using ECDT are still rare, so only
12657 limited testing was performed of the added functionality.)
12659 Fixed memory leaks in the EC driver.
12661 Eliminated a brittle code structure in acpi_bus_init().
12663 Eliminated the acpi_evaluate() helper function in utils.c. It is
12664 no longer needed since acpi_evaluate_object can optionally
12665 allocate memory for the return object.
12667 Implemented fix for keyboard hang when getting battery readings on
12668 some systems (Stephen White)
12670 PCI IRQ routing update (Dominik Brodowski)
12672 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
12675 ----------------------------------------
12676 11 June 2002. Summary of changes for this release.
12679 1) ACPI CA Core Subsystem Version 20020611:
12681 Fixed a reported problem where constants such as Zero and One
12682 appearing within _PRT packages were not handled correctly within
12683 the resource manager code. Originally reported against the ASL
12684 compiler because the code generator now optimizes integers to
12685 their minimal AML representation (i.e. AML constants if possible.)
12686 The _PRT code now handles all AML constant opcodes correctly
12687 (Zero, One, Ones, Revision).
12689 Fixed a problem with the Concatenate operator in the AML
12690 interpreter where a buffer result object was incorrectly marked as
12691 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
12693 All package sub-objects are now fully resolved before they are
12694 returned from the external ACPI interfaces. This means that name
12695 strings are resolved to object handles, and constant operators
12696 (Zero, One, Ones, Revision) are resolved to Integers.
12698 Implemented immediate resolution of the AML Constant opcodes
12699 (Zero, One, Ones, Revision) to Integer objects upon detection
12700 within the AML stream. This has simplified and reduced the
12701 generated code size of the subsystem by eliminating about 10
12702 switch statements for these constants (which previously were
12703 contained in Reference objects.) The complicating issues are that
12704 the Zero opcode is used as a "placeholder" for unspecified
12705 optional target operands and stores to constants are defined to be
12708 Code and Data Size: Current core subsystem library sizes are shown
12709 below. These are the code and data sizes for the acpica.lib
12710 produced by the Microsoft Visual C++ 6.0 compiler, and these
12711 values do not include any ACPI driver or OSPM code. The debug
12712 version of the code includes the debug output trace mechanism and
12713 has a larger code and data size. Note that these values will vary
12714 depending on the efficiency of the compiler and the compiler
12715 options used during generation.
12718 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
12719 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
12721 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
12722 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
12728 Added preliminary support for obtaining _TRA data for PCI root
12729 bridges (Bjorn Helgaas).
12732 3) iASL Compiler Version X2046:
12734 Fixed a problem where the "_DDN" reserved name was defined to be a
12735 control method with one argument. There are no arguments, and
12736 _DDN does not have to be a control method.
12738 Fixed a problem with the Linux version of the compiler where the
12739 source lines printed with error messages were the wrong lines.
12740 This turned out to be the "LF versus CR/LF" difference between
12741 Windows and Unix. This appears to be the longstanding issue
12742 concerning listing output and error messages.
12744 Fixed a problem with the Linux version of compiler where opcode
12745 names within error messages were wrong. This was caused by a
12746 slight difference in the output of the Flex tool on Linux versus
12749 Fixed a problem with the Linux compiler where the hex output files
12750 contained some garbage data caused by an internal buffer overrun.
12753 ----------------------------------------
12754 17 May 2002. Summary of changes for this release.
12757 1) ACPI CA Core Subsystem Version 20020517:
12759 Implemented a workaround to an BIOS bug discovered on the HP
12760 OmniBook where the FADT revision number and the table size are
12761 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
12762 behavior is to fallback to using only the ACPI 1.0 fields of the
12763 FADT if the table is too small to be a ACPI 2.0 table as claimed
12764 by the revision number. Although this is a BIOS bug, this is a
12765 case where the workaround is simple enough and with no side
12766 effects, so it seemed prudent to add it. A warning message is
12769 Implemented minimum size checks for the fixed-length ACPI tables -
12770 - the FADT and FACS, as well as consistency checks between the
12771 revision number and the table size.
12773 Fixed a reported problem in the table override support where the
12774 new table pointer was incorrectly treated as a physical address
12775 instead of a logical address.
12777 Eliminated the use of the AE_AML_ERROR exception and replaced it
12778 with more descriptive codes.
12780 Fixed a problem where an exception would occur if an ASL Field was
12781 defined with no named Field Units underneath it (used by some
12784 Code and Data Size: Current core subsystem library sizes are shown
12785 below. These are the code and data sizes for the acpica.lib
12786 produced by the Microsoft Visual C++ 6.0 compiler, and these
12787 values do not include any ACPI driver or OSPM code. The debug
12788 version of the code includes the debug output trace mechanism and
12789 has a larger code and data size. Note that these values will vary
12790 depending on the efficiency of the compiler and the compiler
12791 options used during generation.
12794 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
12795 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
12797 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
12798 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
12804 Much work done on ACPI init (MADT and PCI IRQ routing support).
12805 (Paul D. and Dominik Brodowski)
12807 Fix PCI IRQ-related panic on boot (Sam Revitch)
12809 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
12811 Fix "MHz" typo (Dominik Brodowski)
12813 Fix RTC year 2000 issue (Dominik Brodowski)
12815 Preclude multiple button proc entries (Eric Brunet)
12817 Moved arch-specific code out of include/platform/aclinux.h
12819 3) iASL Compiler Version X2044:
12821 Implemented error checking for the string used in the EISAID macro
12822 (Usually used in the definition of the _HID object.) The code now
12823 strictly enforces the PnP format - exactly 7 characters, 3
12824 uppercase letters and 4 hex digits.
12826 If a raw string is used in the definition of the _HID object
12827 (instead of the EISAID macro), the string must contain all
12828 alphanumeric characters (e.g., "*PNP0011" is not allowed because
12831 Implemented checking for invalid use of ACPI reserved names for
12832 most of the name creation operators (Name, Device, Event, Mutex,
12833 OperationRegion, PowerResource, Processor, and ThermalZone.)
12834 Previously, this check was only performed for control methods.
12836 Implemented an additional check on the Name operator to emit an
12837 error if a reserved name that must be implemented in ASL as a
12838 control method is used. We know that a reserved name must be a
12839 method if it is defined with input arguments.
12841 The warning emitted when a namespace object reference is not found
12842 during the cross reference phase has been changed into an error.
12843 The "External" directive should be used for names defined in other
12847 4) Tools and Utilities
12849 The 16-bit tools (adump16 and aexec16) have been regenerated and
12852 Fixed a problem with the output of both acpidump and adump16 where
12853 the indentation of closing parentheses and brackets was not
12855 aligned properly with the parent block.
12858 ----------------------------------------
12859 03 May 2002. Summary of changes for this release.
12862 1) ACPI CA Core Subsystem Version 20020503:
12864 Added support a new OSL interface that allows the host operating
12866 system software to override the DSDT found in the firmware -
12867 AcpiOsTableOverride. With this interface, the OSL can examine the
12868 version of the firmware DSDT and replace it with a different one
12871 Added new external interfaces for accessing ACPI registers from
12872 device drivers and other system software - AcpiGetRegister and
12873 AcpiSetRegister. This was simply an externalization of the
12874 existing AcpiHwBitRegister interfaces.
12876 Fixed a regression introduced in the previous build where the
12877 ASL/AML CreateField operator always returned an error,
12878 "destination must be a NS Node".
12880 Extended the maximum time (before failure) to successfully enable
12881 ACPI mode to 3 seconds.
12883 Code and Data Size: Current core subsystem library sizes are shown
12884 below. These are the code and data sizes for the acpica.lib
12885 produced by the Microsoft Visual C++ 6.0 compiler, and these
12886 values do not include any ACPI driver or OSPM code. The debug
12887 version of the code includes the debug output trace mechanism and
12888 has a larger code and data size. Note that these values will vary
12889 depending on the efficiency of the compiler and the compiler
12890 options used during generation.
12893 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
12894 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
12896 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
12897 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
12902 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
12903 free. While 3 out of 4 of our in-house systems work fine, the last
12904 one still hangs when testing the LAPIC timer.
12906 Renamed many files in 2.5 kernel release to omit "acpi_" from the
12909 Added warning on boot for Presario 711FR.
12911 Sleep improvements (Pavel Machek)
12913 ACPI can now be built without CONFIG_PCI enabled.
12915 IA64: Fixed memory map functions (JI Lee)
12918 3) iASL Compiler Version X2043:
12920 Added support to allow the compiler to be integrated into the MS
12921 VC++ development environment for one-button compilation of single
12922 files or entire projects -- with error-to-source-line mapping.
12924 Implemented support for compile-time constant folding for the
12925 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
12926 specification. This allows the ASL writer to use expressions
12927 instead of Integer/Buffer/String constants in terms that must
12928 evaluate to constants at compile time and will also simplify the
12929 emitted AML in any such sub-expressions that can be folded
12930 (evaluated at compile-time.) This increases the size of the
12931 compiler significantly because a portion of the ACPI CA AML
12932 interpreter is included within the compiler in order to pre-
12933 evaluate constant expressions.
12936 Fixed a problem with the "Unicode" ASL macro that caused the
12937 compiler to fault. (This macro is used in conjunction with the
12938 _STR reserved name.)
12940 Implemented an AML opcode optimization to use the Zero, One, and
12941 Ones opcodes where possible to further reduce the size of integer
12942 constants and thus reduce the overall size of the generated AML
12945 Implemented error checking for new reserved terms for ACPI version
12948 Implemented the -qr option to display the current list of ACPI
12949 reserved names known to the compiler.
12951 Implemented the -qc option to display the current list of ASL
12952 operators that are allowed within constant expressions and can
12953 therefore be folded at compile time if the operands are constants.
12958 Updated the Programmer's Reference for new interfaces, data types,
12959 and memory allocation model options.
12961 Updated the iASL Compiler User Reference to apply new format and
12962 add information about new features and options.
12964 ----------------------------------------
12965 19 April 2002. Summary of changes for this release.
12967 1) ACPI CA Core Subsystem Version 20020419:
12969 The source code base for the Core Subsystem has been completely
12970 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
12971 versions. The Lint option files used are included in the
12972 /acpi/generate/lint directory.
12974 Implemented enhanced status/error checking across the entire
12975 Hardware manager subsystem. Any hardware errors (reported from
12976 the OSL) are now bubbled up and will abort a running control
12980 Fixed a problem where the per-ACPI-table integer width (32 or 64)
12981 was stored only with control method nodes, causing a fault when
12982 non-control method code was executed during table loading. The
12983 solution implemented uses a global variable to indicate table
12984 width across the entire ACPI subsystem. Therefore, ACPI CA does
12985 not support mixed integer widths across different ACPI tables
12988 Fixed a problem where NULL extended fields (X fields) in an ACPI
12989 2.0 ACPI FADT caused the table load to fail. Although the
12990 existing ACPI specification is a bit fuzzy on this topic, the new
12991 behavior is to fall back on a ACPI 1.0 field if the corresponding
12992 ACPI 2.0 X field is zero (even though the table revision indicates
12993 a full ACPI 2.0 table.) The ACPI specification will be updated to
12994 clarify this issue.
12996 Fixed a problem with the SystemMemory operation region handler
12997 where memory was always accessed byte-wise even if the AML-
12998 specified access width was larger than a byte. This caused
12999 problems on systems with memory-mapped I/O. Memory is now
13000 accessed with the width specified. On systems that do not support
13001 non-aligned transfers, a check is made to guarantee proper address
13002 alignment before proceeding in order to avoid an AML-caused
13003 alignment fault within the kernel.
13006 Fixed a problem with the ExtendedIrq resource where only one byte
13007 of the 4-byte Irq field was extracted.
13009 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
13010 function was out of date and required a rewrite.
13012 Code and Data Size: Current core subsystem library sizes are shown
13013 below. These are the code and data sizes for the acpica.lib
13014 produced by the Microsoft Visual C++ 6.0 compiler, and these
13015 values do not include any ACPI driver or OSPM code. The debug
13016 version of the code includes the debug output trace mechanism and
13017 has a larger code and data size. Note that these values will vary
13018 depending on the efficiency of the compiler and the compiler
13019 options used during generation.
13022 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
13023 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
13025 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
13026 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
13031 PCI IRQ routing fixes (Dominik Brodowski)
13034 3) iASL Compiler Version X2042:
13036 Implemented an additional compile-time error check for a field
13037 unit whose size + minimum access width would cause a run-time
13038 access beyond the end-of-region. Previously, only the field size
13039 itself was checked.
13041 The Core subsystem and iASL compiler now share a common parse
13042 object in preparation for compile-time evaluation of the type
13043 3/4/5 ASL operators.
13046 ----------------------------------------
13047 Summary of changes for this release: 03_29_02
13049 1) ACPI CA Core Subsystem Version 20020329:
13051 Implemented support for late evaluation of TermArg operands to
13052 Buffer and Package objects. This allows complex expressions to be
13053 used in the declarations of these object types.
13055 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
13056 1.0, if the field was larger than 32 bits, it was returned as a
13057 buffer - otherwise it was returned as an integer. In ACPI 2.0,
13058 the field is returned as a buffer only if the field is larger than
13059 64 bits. The TableRevision is now considered when making this
13060 conversion to avoid incompatibility with existing ASL code.
13062 Implemented logical addressing for AcpiOsGetRootPointer. This
13063 allows an RSDP with either a logical or physical address. With
13064 this support, the host OS can now override all ACPI tables with
13065 one logical RSDP. Includes implementation of "typed" pointer
13066 support to allow a common data type for both physical and logical
13067 pointers internally. This required a change to the
13068 AcpiOsGetRootPointer interface.
13070 Implemented the use of ACPI 2.0 Generic Address Structures for all
13071 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
13072 mapped I/O for these ACPI features.
13074 Initialization now ignores not only non-required tables (All
13075 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
13076 not validate the table headers of unrecognized tables.
13078 Fixed a problem where a notify handler could only be
13079 installed/removed on an object of type Device. All "notify"
13081 objects are now supported -- Devices, Processor, Power, and
13084 Removed most verbosity from the ACPI_DB_INFO debug level. Only
13085 critical information is returned when this debug level is enabled.
13087 Code and Data Size: Current core subsystem library sizes are shown
13088 below. These are the code and data sizes for the acpica.lib
13089 produced by the Microsoft Visual C++ 6.0 compiler, and these
13090 values do not include any ACPI driver or OSPM code. The debug
13091 version of the code includes the debug output trace mechanism and
13092 has a larger code and data size. Note that these values will vary
13093 depending on the efficiency of the compiler and the compiler
13094 options used during generation.
13097 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
13098 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
13100 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
13101 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
13106 The processor driver (acpi_processor.c) now fully supports ACPI
13107 2.0-based processor performance control (e.g. Intel(R)
13108 SpeedStep(TM) technology) Note that older laptops that only have
13109 the Intel "applet" interface are not supported through this. The
13110 'limit' and 'performance' interface (/proc) are fully functional.
13111 [Note that basic policy for controlling performance state
13112 transitions will be included in the next version of ospmd.] The
13113 idle handler was modified to more aggressively use C2, and PIIX4
13114 errata handling underwent a complete overhaul (big thanks to
13115 Dominik Brodowski).
13117 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
13118 based devices in the ACPI namespace are now dynamically bound
13119 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
13120 This allows, among other things, ACPI to resolve bus numbers for
13121 subordinate PCI bridges.
13123 Enhanced PCI IRQ routing to get the proper bus number for _PRT
13124 entries defined underneath PCI bridges.
13126 Added IBM 600E to bad bios list due to invalid _ADR value for
13127 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
13129 In the process of adding full MADT support (e.g. IOAPIC) for IA32
13130 (acpi.c, mpparse.c) -- stay tuned.
13132 Added back visual differentiation between fixed-feature and
13133 control-method buttons in dmesg. Buttons are also subtyped (e.g.
13134 button/power/PWRF) to simplify button identification.
13136 We no longer use -Wno-unused when compiling debug. Please ignore
13137 any "_THIS_MODULE defined but not used" messages.
13139 Can now shut down the system using "magic sysrq" key.
13142 3) iASL Compiler version 2041:
13144 Fixed a problem where conversion errors for hex/octal/decimal
13145 constants were not reported.
13147 Implemented a fix for the General Register template Address field.
13148 This field was 8 bits when it should be 64.
13150 Fixed a problem where errors/warnings were no longer being emitted
13151 within the listing output file.
13153 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
13154 exactly 4 characters, alphanumeric only.
13159 ----------------------------------------
13160 Summary of changes for this release: 03_08_02
13163 1) ACPI CA Core Subsystem Version 20020308:
13165 Fixed a problem with AML Fields where the use of the "AccessAny"
13166 keyword could cause an interpreter error due to attempting to read
13167 or write beyond the end of the parent Operation Region.
13169 Fixed a problem in the SystemMemory Operation Region handler where
13170 an attempt was made to map memory beyond the end of the region.
13171 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
13172 errors on some Linux systems.
13174 Fixed a problem where the interpreter/namespace "search to root"
13175 algorithm was not functioning for some object types. Relaxed the
13176 internal restriction on the search to allow upsearches for all
13177 external object types as well as most internal types.
13182 We now use safe_halt() macro versus individual calls to sti | hlt.
13184 Writing to the processor limit interface should now work. "echo 1"
13185 will increase the limit, 2 will decrease, and 0 will reset to the
13192 Fixed segfault on Linux version.
13195 ----------------------------------------
13196 Summary of changes for this release: 02_25_02
13198 1) ACPI CA Core Subsystem:
13201 Fixed a problem where the GPE bit masks were not initialized
13202 properly, causing erratic GPE behavior.
13204 Implemented limited support for multiple calling conventions. The
13205 code can be generated with either the VPL (variable parameter
13206 list, or "C") convention, or the FPL (fixed parameter list, or
13207 "Pascal") convention. The core subsystem is about 3.4% smaller
13208 when generated with FPL.
13213 Re-add some /proc/acpi/event functionality that was lost during
13216 Resolved issue with /proc events for fixed-feature buttons showing
13217 up as the system device.
13219 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
13221 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
13223 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
13225 Fixed limit interface & usage to fix bugs with passive cooling
13228 Restructured PRT support.
13231 ----------------------------------------
13232 Summary of changes for this label: 02_14_02
13235 1) ACPI CA Core Subsystem:
13237 Implemented support in AcpiLoadTable to allow loading of FACS and
13240 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
13241 been removed. All 64-bit platforms should be migrated to the ACPI
13242 2.0 tables. The actbl71.h header has been removed from the source
13245 All C macros defined within the subsystem have been prefixed with
13246 "ACPI_" to avoid collision with other system include files.
13248 Removed the return value for the two AcpiOsPrint interfaces, since
13249 it is never used and causes lint warnings for ignoring the return
13252 Added error checking to all internal mutex acquire and release
13253 calls. Although a failure from one of these interfaces is
13254 probably a fatal system error, these checks will cause the
13255 immediate abort of the currently executing method or interface.
13257 Fixed a problem where the AcpiSetCurrentResources interface could
13258 fault. This was a side effect of the deployment of the new memory
13261 Fixed a couple of problems with the Global Lock support introduced
13262 in the last major build. The "common" (1.0/2.0) internal FACS was
13263 being overwritten with the FACS signature and clobbering the
13264 Global Lock pointer. Also, the actual firmware FACS was being
13265 unmapped after construction of the "common" FACS, preventing
13266 access to the actual Global Lock field within it. The "common"
13267 internal FACS is no longer installed as an actual ACPI table; it
13268 is used simply as a global.
13270 Code and Data Size: Current core subsystem library sizes are shown
13271 below. These are the code and data sizes for the acpica.lib
13272 produced by the Microsoft Visual C++ 6.0 compiler, and these
13273 values do not include any ACPI driver or OSPM code. The debug
13274 version of the code includes the debug output trace mechanism and
13275 has a larger code and data size. Note that these values will vary
13276 depending on the efficiency of the compiler and the compiler
13277 options used during generation.
13279 Previous Release (02_07_01)
13280 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
13281 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
13283 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
13284 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
13289 Updated Linux-specific code for core macro and OSL interface
13290 changes described above.
13292 Improved /proc/acpi/event. It now can be opened only once and has
13293 proper poll functionality.
13295 Fixed and restructured power management (acpi_bus).
13297 Only create /proc "view by type" when devices of that class exist.
13299 Fixed "charging/discharging" bug (and others) in acpi_battery.
13301 Improved thermal zone code.
13304 3) ASL Compiler, version X2039:
13307 Implemented the new compiler restriction on ASL String hex/octal
13308 escapes to non-null, ASCII values. An error results if an invalid
13309 value is used. (This will require an ACPI 2.0 specification
13312 AML object labels that are output to the optional C and ASM source
13313 are now prefixed with both the ACPI table signature and table ID
13314 to help guarantee uniqueness within a large BIOS project.
13317 ----------------------------------------
13318 Summary of changes for this label: 02_01_02
13320 1) ACPI CA Core Subsystem:
13322 ACPI 2.0 support is complete in the entire Core Subsystem and the
13323 ASL compiler. All new ACPI 2.0 operators are implemented and all
13324 other changes for ACPI 2.0 support are complete. With
13325 simultaneous code and data optimizations throughout the subsystem,
13326 ACPI 2.0 support has been implemented with almost no additional
13327 cost in terms of code and data size.
13329 Implemented a new mechanism for allocation of return buffers. If
13330 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
13331 be allocated on behalf of the caller. Consolidated all return
13332 buffer validation and allocation to a common procedure. Return
13333 buffers will be allocated via the primary OSL allocation interface
13334 since it appears that a separate pool is not needed by most users.
13335 If a separate pool is required for these buffers, the caller can
13336 still use the original mechanism and pre-allocate the buffer(s).
13338 Implemented support for string operands within the DerefOf
13341 Restructured the Hardware and Event managers to be table driven,
13342 simplifying the source code and reducing the amount of generated
13345 Split the common read/write low-level ACPI register bitfield
13346 procedure into a separate read and write, simplifying the code
13349 Obsoleted the AcpiOsCallocate OSL interface. This interface was
13350 used only a handful of times and didn't have enough critical mass
13351 for a separate interface. Replaced with a common calloc procedure
13354 Fixed a reported problem with the GPE number mapping mechanism
13355 that allows GPE1 numbers to be non-contiguous with GPE0.
13356 Reorganized the GPE information and shrunk a large array that was
13357 originally large enough to hold info for all possible GPEs (256)
13358 to simply large enough to hold all GPEs up to the largest GPE
13359 number on the machine.
13361 Fixed a reported problem with resource structure alignment on 64-
13364 Changed the AcpiEnableEvent and AcpiDisableEvent external
13365 interfaces to not require any flags for the common case of
13366 enabling/disabling a GPE.
13368 Implemented support to allow a "Notify" on a Processor object.
13370 Most TBDs in comments within the source code have been resolved
13374 Fixed a problem in the interpreter where a standalone parent
13375 prefix (^) was not handled correctly in the interpreter and
13378 Removed obsolete and unnecessary GPE save/restore code.
13380 Implemented Field support in the ASL Load operator. This allows a
13381 table to be loaded from a named field, in addition to loading a
13382 table directly from an Operation Region.
13384 Implemented timeout and handle support in the external Global Lock
13387 Fixed a problem in the AcpiDump utility where pathnames were no
13388 longer being generated correctly during the dump of named objects.
13390 Modified the AML debugger to give a full display of if/while
13391 predicates instead of just one AML opcode at a time. (The
13392 predicate can have several nested ASL statements.) The old method
13393 was confusing during single stepping.
13395 Code and Data Size: Current core subsystem library sizes are shown
13396 below. These are the code and data sizes for the acpica.lib
13397 produced by the Microsoft Visual C++ 6.0 compiler, and these
13398 values do not include any ACPI driver or OSPM code. The debug
13399 version of the code includes the debug output trace mechanism and
13400 has a larger code and data size. Note that these values will vary
13401 depending on the efficiency of the compiler and the compiler
13402 options used during generation.
13404 Previous Release (12_18_01)
13405 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
13406 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
13408 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
13409 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
13413 Implemented fix for PIIX reverse throttling errata (Processor
13416 Added new Limit interface (Processor and Thermal drivers)
13418 New thermal policy (Thermal driver)
13420 Many updates to /proc
13422 Battery "low" event support (Battery driver)
13424 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
13426 IA32 - IA64 initialization unification, no longer experimental
13428 Menuconfig options redesigned
13430 3) ASL Compiler, version X2037:
13432 Implemented several new output features to simplify integration of
13433 AML code into firmware: 1) Output the AML in C source code with
13434 labels for each named ASL object. The original ASL source code
13435 is interleaved as C comments. 2) Output the AML in ASM source code
13436 with labels and interleaved ASL source. 3) Output the AML in
13437 raw hex table form, in either C or ASM.
13439 Implemented support for optional string parameters to the
13440 LoadTable operator.
13442 Completed support for embedded escape sequences within string
13443 literals. The compiler now supports all single character escapes
13444 as well as the Octal and Hex escapes. Note: the insertion of a
13445 null byte into a string literal (via the hex/octal escape) causes
13446 the string to be immediately terminated. A warning is issued.
13448 Fixed a problem where incorrect AML was generated for the case
13449 where an ASL namepath consists of a single parent prefix (
13451 ) with no trailing name segments.
13453 The compiler has been successfully generated with a 64-bit C
13459 ----------------------------------------
13460 Summary of changes for this label: 12_18_01
13464 Enhanced blacklist with reason and severity fields. Any table's
13465 signature may now be used to identify a blacklisted system.
13467 Call _PIC control method to inform the firmware which interrupt
13468 model the OS is using. Turn on any disabled link devices.
13470 Cleaned up busmgr /proc error handling (Andreas Dilger)
13472 2) ACPI CA Core Subsystem:
13474 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
13477 Completed implementation of the ACPI 2.0 "Continue",
13478 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
13479 operators. All new ACPI 2.0 operators are now implemented in both
13480 the ASL compiler and the AML interpreter. The only remaining ACPI
13481 2.0 task is support for the String data type in the DerefOf
13482 operator. Fixed a problem with AcquireMutex where the status code
13483 was lost if the caller had to actually wait for the mutex.
13485 Increased the maximum ASL Field size from 64K bits to 4G bits.
13487 Completed implementation of the external Global Lock interfaces --
13488 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
13489 Handler parameters were added.
13491 Completed another pass at removing warnings and issues when
13492 compiling with 64-bit compilers. The code now compiles cleanly
13493 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
13494 add and subtract (diff) macros have changed considerably.
13497 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
13498 64-bit platforms, 32-bits on all others. This type is used
13499 wherever memory allocation and/or the C sizeof() operator is used,
13500 and affects the OSL memory allocation interfaces AcpiOsAllocate
13501 and AcpiOsCallocate.
13503 Implemented sticky user breakpoints in the AML debugger.
13505 Code and Data Size: Current core subsystem library sizes are shown
13506 below. These are the code and data sizes for the acpica.lib
13507 produced by the Microsoft Visual C++ 6.0 compiler, and these
13508 values do not include any ACPI driver or OSPM code. The debug
13509 version of the code includes the debug output trace mechanism and
13510 has a larger code and data size. Note that these values will vary
13511 depending on the efficiency of the compiler and the compiler
13512 options used during generation.
13514 Previous Release (12_05_01)
13515 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
13516 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
13518 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
13519 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
13521 3) ASL Compiler, version X2034:
13523 Now checks for (and generates an error if detected) the use of a
13524 Break or Continue statement without an enclosing While statement.
13527 Successfully generated the compiler with the Intel 64-bit C
13530 ----------------------------------------
13531 Summary of changes for this label: 12_05_01
13533 1) ACPI CA Core Subsystem:
13535 The ACPI 2.0 CopyObject operator is fully implemented. This
13536 operator creates a new copy of an object (and is also used to
13537 bypass the "implicit conversion" mechanism of the Store operator.)
13539 The ACPI 2.0 semantics for the SizeOf operator are fully
13540 implemented. The change is that performing a SizeOf on a
13541 reference object causes an automatic dereference of the object to
13542 tha actual value before the size is evaluated. This behavior was
13543 undefined in ACPI 1.0.
13545 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
13546 have been implemented. The interrupt polarity and mode are now
13549 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
13550 appearing in Package objects were not properly converted to
13551 integers when the internal Package was converted to an external
13552 object (via the AcpiEvaluateObject interface.)
13554 Fixed a problem with the namespace object deletion mechanism for
13555 objects created by control methods. There were two parts to this
13556 problem: 1) Objects created during the initialization phase method
13557 parse were not being deleted, and 2) The object owner ID mechanism
13558 to track objects was broken.
13560 Fixed a problem where the use of the ASL Scope operator within a
13561 control method would result in an invalid opcode exception.
13563 Fixed a problem introduced in the previous label where the buffer
13564 length required for the _PRT structure was not being returned
13567 Code and Data Size: Current core subsystem library sizes are shown
13568 below. These are the code and data sizes for the acpica.lib
13569 produced by the Microsoft Visual C++ 6.0 compiler, and these
13570 values do not include any ACPI driver or OSPM code. The debug
13571 version of the code includes the debug output trace mechanism and
13572 has a larger code and data size. Note that these values will vary
13573 depending on the efficiency of the compiler and the compiler
13574 options used during generation.
13576 Previous Release (11_20_01)
13577 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
13578 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
13581 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
13582 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
13586 Updated all files to apply cleanly against 2.4.16.
13588 Added basic PCI Interrupt Routing Table (PRT) support for IA32
13589 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
13590 version supports both static and dyanmic PRT entries, but dynamic
13591 entries are treated as if they were static (not yet
13592 reconfigurable). Architecture- specific code to use this data is
13593 absent on IA32 but should be available shortly.
13595 Changed the initialization sequence to start the ACPI interpreter
13596 (acpi_init) prior to initialization of the PCI driver (pci_init)
13597 in init/main.c. This ordering is required to support PRT and
13598 facilitate other (future) enhancement. A side effect is that the
13599 ACPI bus driver and certain device drivers can no longer be loaded
13602 Modified the 'make menuconfig' options to allow PCI Interrupt
13603 Routing support to be included without the ACPI Bus and other
13606 3) ASL Compiler, version X2033:
13608 Fixed some issues with the use of the new CopyObject and
13609 DataTableRegion operators. Both are fully functional.
13611 ----------------------------------------
13612 Summary of changes for this label: 11_20_01
13614 20 November 2001. Summary of changes for this release.
13616 1) ACPI CA Core Subsystem:
13618 Updated Index support to match ACPI 2.0 semantics. Storing a
13619 Integer, String, or Buffer to an Index of a Buffer will store only
13620 the least-significant byte of the source to the Indexed buffer
13621 byte. Multiple writes are not performed.
13623 Fixed a problem where the access type used in an AccessAs ASL
13624 operator was not recorded correctly into the field object.
13626 Fixed a problem where ASL Event objects were created in a
13627 signalled state. Events are now created in an unsignalled state.
13629 The internal object cache is now purged after table loading and
13630 initialization to reduce the use of dynamic kernel memory -- on
13631 the assumption that object use is greatest during the parse phase
13632 of the entire table (versus the run-time use of individual control
13635 ACPI 2.0 variable-length packages are now fully operational.
13637 Code and Data Size: Code and Data optimizations have permitted new
13638 feature development with an actual reduction in the library size.
13639 Current core subsystem library sizes are shown below. These are
13640 the code and data sizes for the acpica.lib produced by the
13641 Microsoft Visual C++ 6.0 compiler, and these values do not include
13642 any ACPI driver or OSPM code. The debug version of the code
13643 includes the debug output trace mechanism and has a larger code
13644 and data size. Note that these values will vary depending on the
13645 efficiency of the compiler and the compiler options used during
13648 Previous Release (11_09_01):
13649 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
13650 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
13653 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
13654 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
13658 Enhanced the ACPI boot-time initialization code to allow the use
13659 of Local APIC tables for processor enumeration on IA-32, and to
13660 pave the way for a fully MPS-free boot (on SMP systems) in the
13661 near future. This functionality replaces
13662 arch/i386/kernel/acpitables.c, which was introduced in an earlier
13663 2.4.15-preX release. To enable this feature you must add
13664 "acpi_boot=on" to the kernel command line -- see the help entry
13665 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
13668 Restructured the configuration options to allow boot-time table
13669 parsing support without inclusion of the ACPI Interpreter (and
13672 NOTE: This release does not include fixes for the reported events,
13673 power-down, and thermal passive cooling issues (coming soon).
13677 Added additional typechecking for Fields within restricted access
13678 Operation Regions. All fields within EC and CMOS regions must be
13679 declared with ByteAcc. All fields withing SMBus regions must be
13680 declared with the BufferAcc access type.
13682 Fixed a problem where the listing file output of control methods
13683 no longer interleaved the actual AML code with the ASL source
13689 ----------------------------------------
13690 Summary of changes for this label: 11_09_01
13692 1) ACPI CA Core Subsystem:
13694 Implemented ACPI 2.0-defined support for writes to fields with a
13695 Buffer, String, or Integer source operand that is smaller than the
13696 target field. In these cases, the source operand is zero-extended
13697 to fill the target field.
13699 Fixed a problem where a Field starting bit offset (within the
13700 parent operation region) was calculated incorrectly if the
13702 alignment of the field differed from the access width. This
13703 affected CreateWordField, CreateDwordField, CreateQwordField, and
13704 possibly other fields that use the "AccessAny" keyword.
13706 Fixed a problem introduced in the 11_02_01 release where indirect
13707 stores through method arguments did not operate correctly.
13711 Implemented boot-time ACPI table parsing support
13712 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
13713 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
13714 legacy BIOS interfaces (e.g. MPS) for the configuration of system
13715 processors, memory, and interrupts during setup_arch(). Note that
13716 this patch does not include the required architecture-specific
13717 changes required to apply this information -- subsequent patches
13718 will be posted for both IA32 and IA64 to achieve this.
13720 Added low-level sleep support for IA32 platforms, courtesy of Pat
13721 Mochel. This allows IA32 systems to transition to/from various
13722 sleeping states (e.g. S1, S3), although the lack of a centralized
13723 driver model and power-manageable drivers will prevent its
13724 (successful) use on most systems.
13726 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
13727 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
13728 tables" option, etc.
13730 Increased the default timeout for the EC driver from 1ms to 10ms
13731 (1000 cycles of 10us) to try to address AE_TIME errors during EC
13734 ----------------------------------------
13735 Summary of changes for this label: 11_02_01
13737 1) ACPI CA Core Subsystem:
13739 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
13740 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
13743 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
13744 changes to support ACPI 2.0 Qword field access. Read/Write
13745 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
13746 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
13747 the value parameter for the address space handler interface is now
13748 an ACPI_INTEGER. OSL implementations of these interfaces must now
13749 handle the case where the Width parameter is 64.
13751 Index Fields: Fixed a problem where unaligned bit assembly and
13752 disassembly for IndexFields was not supported correctly.
13754 Index and Bank Fields: Nested Index and Bank Fields are now
13755 supported. During field access, a check is performed to ensure
13756 that the value written to an Index or Bank register is not out of
13757 the range of the register. The Index (or Bank) register is
13758 written before each access to the field data. Future support will
13759 include allowing individual IndexFields to be wider than the
13760 DataRegister width.
13762 Fields: Fixed a problem where the AML interpreter was incorrectly
13763 attempting to write beyond the end of a Field/OpRegion. This was
13764 a boundary case that occurred when a DWORD field was written to a
13765 BYTE access OpRegion, forcing multiple writes and causing the
13766 interpreter to write one datum too many.
13768 Fields: Fixed a problem with Field/OpRegion access where the
13769 starting bit address of a field was incorrectly calculated if the
13770 current access type was wider than a byte (WordAcc, DwordAcc, or
13773 Fields: Fixed a problem where forward references to individual
13774 FieldUnits (individual Field names within a Field definition) were
13775 not resolved during the AML table load.
13777 Fields: Fixed a problem where forward references from a Field
13778 definition to the parent Operation Region definition were not
13779 resolved during the AML table load.
13781 Fields: Duplicate FieldUnit names within a scope are now detected
13782 during AML table load.
13784 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
13785 returned an incorrect name for the root node.
13787 Code and Data Size: Code and Data optimizations have permitted new
13788 feature development with an actual reduction in the library size.
13789 Current core subsystem library sizes are shown below. These are
13790 the code and data sizes for the acpica.lib produced by the
13791 Microsoft Visual C++ 6.0 compiler, and these values do not include
13792 any ACPI driver or OSPM code. The debug version of the code
13793 includes the debug output trace mechanism and has a larger code
13794 and data size. Note that these values will vary depending on the
13795 efficiency of the compiler and the compiler options used during
13798 Previous Release (10_18_01):
13799 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
13800 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
13803 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
13804 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
13808 Improved /proc processor output (Pavel Machek) Re-added
13809 MODULE_LICENSE("GPL") to all modules.
13811 3) ASL Compiler version X2030:
13813 Duplicate FieldUnit names within a scope are now detected and
13818 Programmer Reference updated to reflect OSL and address space
13819 handler interface changes described above.
13821 ----------------------------------------
13822 Summary of changes for this label: 10_18_01
13824 ACPI CA Core Subsystem:
13826 Fixed a problem with the internal object reference count mechanism
13827 that occasionally caused premature object deletion. This resolves
13828 all of the outstanding problem reports where an object is deleted
13829 in the middle of an interpreter evaluation. Although this problem
13830 only showed up in rather obscure cases, the solution to the
13831 problem involved an adjustment of all reference counts involving
13832 objects attached to namespace nodes.
13834 Fixed a problem with Field support in the interpreter where
13835 writing to an aligned field whose length is an exact multiple (2
13836 or greater) of the field access granularity would cause an attempt
13837 to write beyond the end of the field.
13839 The top level AML opcode execution functions within the
13840 interpreter have been renamed with a more meaningful and
13841 consistent naming convention. The modules exmonad.c and
13842 exdyadic.c were eliminated. New modules are exoparg1.c,
13843 exoparg2.c, exoparg3.c, and exoparg6.c.
13845 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
13847 Fixed a problem where the AML debugger was causing some internal
13848 objects to not be deleted during subsystem termination.
13850 Fixed a problem with the external AcpiEvaluateObject interface
13851 where the subsystem would fault if the named object to be
13852 evaluated refered to a constant such as Zero, Ones, etc.
13854 Fixed a problem with IndexFields and BankFields where the
13855 subsystem would fault if the index, data, or bank registers were
13856 not defined in the same scope as the field itself.
13858 Added printf format string checking for compilers that support
13859 this feature. Corrected more than 50 instances of issues with
13860 format specifiers within invocations of ACPI_DEBUG_PRINT
13861 throughout the core subsystem code.
13863 The ASL "Revision" operator now returns the ACPI support level
13864 implemented in the core - the value "2" since the ACPI 2.0 support
13865 is more than 50% implemented.
13867 Enhanced the output of the AML debugger "dump namespace" command
13868 to output in a more human-readable form.
13870 Current core subsystem library code sizes are shown below. These
13872 are the code and data sizes for the acpica.lib produced by the
13873 Microsoft Visual C++ 6.0 compiler, and these values do not include
13874 any ACPI driver or OSPM code. The debug version of the code
13875 includes the full debug trace mechanism -- leading to a much
13877 larger code and data size. Note that these values will vary
13878 depending on the efficiency of the compiler and the compiler
13879 options used during generation.
13881 Previous Label (09_20_01):
13882 Non-Debug Version: 65K Code, 5K Data, 70K Total
13883 Debug Version: 138K Code, 58K Data, 196K Total
13887 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
13888 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
13892 Implemented a "Bad BIOS Blacklist" to track machines that have
13893 known ASL/AML problems.
13895 Enhanced the /proc interface for the thermal zone driver and added
13896 support for _HOT (the critical suspend trip point). The 'info'
13897 file now includes threshold/policy information, and allows setting
13898 of _SCP (cooling preference) and _TZP (polling frequency) values
13899 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
13900 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
13901 preference to the passive/quiet mode (if supported by the ASL).
13903 Implemented a workaround for a gcc bug that resuted in an OOPs
13904 when loading the control method battery driver.
13906 ----------------------------------------
13907 Summary of changes for this label: 09_20_01
13909 ACPI CA Core Subsystem:
13911 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
13912 modified to allow individual GPE levels to be flagged as wake-
13913 enabled (i.e., these GPEs are to remain enabled when the platform
13916 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
13917 support wake-enabled GPEs. This means that upon entering the
13918 sleep state, all GPEs that are not wake-enabled are disabled.
13919 When leaving the sleep state, these GPEs are reenabled.
13921 A local double-precision divide/modulo module has been added to
13922 enhance portability to OS kernels where a 64-bit math library is
13923 not available. The new module is "utmath.c".
13925 Several optimizations have been made to reduce the use of CPU
13926 stack. Originally over 2K, the maximum stack usage is now below
13927 2K at 1860 bytes (1.82k)
13929 Fixed a problem with the AcpiGetFirmwareTable interface where the
13930 root table pointer was not mapped into a logical address properly.
13932 Fixed a problem where a NULL pointer was being dereferenced in the
13933 interpreter code for the ASL Notify operator.
13935 Fixed a problem where the use of the ASL Revision operator
13936 returned an error. This operator now returns the current version
13937 of the ACPI CA core subsystem.
13939 Fixed a problem where objects passed as control method parameters
13940 to AcpiEvaluateObject were always deleted at method termination.
13941 However, these objects may end up being stored into the namespace
13942 by the called method. The object reference count mechanism was
13943 applied to these objects instead of a force delete.
13945 Fixed a problem where static strings or buffers (contained in the
13946 AML code) that are declared as package elements within the ASL
13947 code could cause a fault because the interpreter would attempt to
13948 delete them. These objects are now marked with the "static
13949 object" flag to prevent any attempt to delete them.
13951 Implemented an interpreter optimization to use operands directly
13952 from the state object instead of extracting the operands to local
13953 variables. This reduces stack use and code size, and improves
13956 The module exxface.c was eliminated as it was an unnecessary extra
13959 Current core subsystem library code sizes are shown below. These
13960 are the code and data sizes for the acpica.lib produced by the
13961 Microsoft Visual C++ 6.0 compiler, and these values do not include
13962 any ACPI driver or OSPM code. The debug version of the code
13963 includes the full debug trace mechanism -- leading to a much
13964 larger code and data size. Note that these values will vary
13965 depending on the efficiency of the compiler and the compiler
13966 options used during generation.
13968 Non-Debug Version: 65K Code, 5K Data, 70K Total
13969 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
13970 Total (Previously 195K)
13974 Support for ACPI 2.0 64-bit integers has been added. All ACPI
13975 Integer objects are now 64 bits wide
13977 All Acpi data types and structures are now in lower case. Only
13978 Acpi macros are upper case for differentiation.
13982 Changes to the external interfaces as described above.
13984 ----------------------------------------
13985 Summary of changes for this label: 08_31_01
13987 ACPI CA Core Subsystem:
13989 A bug with interpreter implementation of the ASL Divide operator
13990 was found and fixed. The implicit function return value (not the
13991 explicit store operands) was returning the remainder instead of
13992 the quotient. This was a longstanding bug and it fixes several
13993 known outstanding issues on various platforms.
13995 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
13996 been further optimized for size. There are 700 invocations of the
13997 DEBUG_PRINT macro alone, so each optimization reduces the size of
13998 the debug version of the subsystem significantly.
14000 A stack trace mechanism has been implemented. The maximum stack
14001 usage is about 2K on 32-bit platforms. The debugger command "stat
14002 stack" will display the current maximum stack usage.
14004 All public symbols and global variables within the subsystem are
14005 now prefixed with the string "Acpi". This keeps all of the
14006 symbols grouped together in a kernel map, and avoids conflicts
14007 with other kernel subsystems.
14009 Most of the internal fixed lookup tables have been moved into the
14010 code segment via the const operator.
14012 Several enhancements have been made to the interpreter to both
14013 reduce the code size and improve performance.
14015 Current core subsystem library code sizes are shown below. These
14016 are the code and data sizes for the acpica.lib produced by the
14017 Microsoft Visual C++ 6.0 compiler, and these values do not include
14018 any ACPI driver or OSPM code. The debug version of the code
14019 includes the full debug trace mechanism which contains over 700
14020 invocations of the DEBUG_PRINT macro, 500 function entry macro
14021 invocations, and over 900 function exit macro invocations --
14022 leading to a much larger code and data size. Note that these
14023 values will vary depending on the efficiency of the compiler and
14024 the compiler options used during generation.
14026 Non-Debug Version: 64K Code, 5K Data, 69K Total
14027 Debug Version: 137K Code, 58K Data, 195K Total
14031 Implemented wbinvd() macro, pending a kernel-wide definition.
14033 Fixed /proc/acpi/event to handle poll() and short reads.
14035 ASL Compiler, version X2026:
14037 Fixed a problem introduced in the previous label where the AML
14039 code emitted for package objects produced packages with zero
14042 ----------------------------------------
14043 Summary of changes for this label: 08_16_01
14045 ACPI CA Core Subsystem:
14047 The following ACPI 2.0 ASL operators have been implemented in the
14048 AML interpreter (These are already supported by the Intel ASL
14049 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
14050 ToBuffer. Support for 64-bit AML constants is implemented in the
14051 AML parser, debugger, and disassembler.
14053 The internal memory tracking mechanism (leak detection code) has
14054 been upgraded to reduce the memory overhead (a separate tracking
14055 block is no longer allocated for each memory allocation), and now
14056 supports all of the internal object caches.
14058 The data structures and code for the internal object caches have
14059 been coelesced and optimized so that there is a single cache and
14060 memory list data structure and a single group of functions that
14061 implement generic cache management. This has reduced the code
14062 size in both the debug and release versions of the subsystem.
14064 The DEBUG_PRINT macro(s) have been optimized for size and replaced
14065 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
14066 different, because it generates a single call to an internal
14067 function. This results in a savings of about 90 bytes per
14068 invocation, resulting in an overall code and data savings of about
14069 16% in the debug version of the subsystem.
14073 Fixed C3 disk corruption problems and re-enabled C3 on supporting
14076 Integrated low-level sleep code by Patrick Mochel.
14078 Further tweaked source code Linuxization.
14084 Support for ACPI 2.0 variable length packages is fixed/completed.
14086 Fixed a problem where the optional length parameter for the ACPI
14087 2.0 ToString operator.
14089 Fixed multiple extraneous error messages when a syntax error is
14090 detected within the declaration line of a control method.
14092 ----------------------------------------
14093 Summary of changes for this label: 07_17_01
14095 ACPI CA Core Subsystem:
14097 Added a new interface named AcpiGetFirmwareTable to obtain any
14098 ACPI table via the ACPI signature. The interface can be called at
14099 any time during kernel initialization, even before the kernel
14100 virtual memory manager is initialized and paging is enabled. This
14101 allows kernel subsystems to obtain ACPI tables very early, even
14102 before the ACPI CA subsystem is initialized.
14104 Fixed a problem where Fields defined with the AnyAcc attribute
14105 could be resolved to the incorrect address under the following
14106 conditions: 1) the field width is larger than 8 bits and 2) the
14107 parent operation region is not defined on a DWORD boundary.
14109 Fixed a problem where the interpreter is not being locked during
14110 namespace initialization (during execution of the _INI control
14111 methods), causing an error when an attempt is made to release it
14114 ACPI 2.0 support in the AML Interpreter has begun and will be
14115 ongoing throughout the rest of this year. In this label, The Mod
14116 operator is implemented.
14118 Added a new data type to contain full PCI addresses named
14119 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
14120 and Function values.
14124 Enhanced the Linux version of the source code to change most
14125 capitalized ACPI type names to lowercase. For example, all
14126 instances of ACPI_STATUS are changed to acpi_status. This will
14127 result in a large diff, but the change is strictly cosmetic and
14128 aligns the CA code closer to the Linux coding standard.
14132 The interfaces to the PCI configuration space have been changed to
14133 add the PCI Segment number and to split the single 32-bit combined
14134 DeviceFunction field into two 16-bit fields. This was
14135 accomplished by moving the four values that define an address in
14136 PCI configuration space (segment, bus, device, and function) to
14137 the new ACPI_PCI_ID structure.
14139 The changes to the PCI configuration space interfaces led to a
14140 reexamination of the complete set of address space access
14141 interfaces for PCI, I/O, and Memory. The previously existing 18
14142 interfaces have proven difficult to maintain (any small change
14143 must be propagated across at least 6 interfaces) and do not easily
14144 allow for future expansion to 64 bits if necessary. Also, on some
14145 systems, it would not be appropriate to demultiplex the access
14146 width (8, 16, 32,or 64) before calling the OSL if the
14147 corresponding native OS interfaces contain a similar access width
14148 parameter. For these reasons, the 18 address space interfaces
14149 have been replaced by these 6 new ones:
14151 AcpiOsReadPciConfiguration
14152 AcpiOsWritePciConfiguration
14158 Added a new interface named AcpiOsGetRootPointer to allow the OSL
14159 to perform the platform and/or OS-specific actions necessary to
14160 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
14161 interface will simply call down to the CA core to perform the low-
14162 memory search for the table. On IA-64, the RSDP is obtained from
14163 EFI. Migrating this interface to the OSL allows the CA core to
14165 remain OS and platform independent.
14167 Added a new interface named AcpiOsSignal to provide a generic
14168 "function code and pointer" interface for various miscellaneous
14169 signals and notifications that must be made to the host OS. The
14170 first such signals are intended to support the ASL Fatal and
14171 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
14172 interface has been obsoleted.
14174 The definition of the AcpiFormatException interface has been
14175 changed to simplify its use. The caller no longer must supply a
14176 buffer to the call; A pointer to a const string is now returned
14177 directly. This allows the call to be easily used in printf
14178 statements, etc. since the caller does not have to manage a local
14182 ASL Compiler, Version X2025:
14184 The ACPI 2.0 Switch/Case/Default operators have been implemented
14185 and are fully functional. They will work with all ACPI 1.0
14186 interpreters, since the operators are simply translated to If/Else
14189 The ACPI 2.0 ElseIf operator is implemented and will also work
14190 with 1.0 interpreters, for the same reason.
14192 Implemented support for ACPI 2.0 variable-length packages. These
14193 packages have a separate opcode, and their size is determined by
14194 the interpreter at run-time.
14196 Documentation The ACPI CA Programmer Reference has been updated to
14197 reflect the new interfaces and changes to existing interfaces.
14199 ------------------------------------------
14200 Summary of changes for this label: 06_15_01
14202 ACPI CA Core Subsystem:
14204 Fixed a problem where a DWORD-accessed field within a Buffer
14205 object would get its byte address inadvertently rounded down to
14206 the nearest DWORD. Buffers are always Byte-accessible.
14208 ASL Compiler, version X2024:
14210 Fixed a problem where the Switch() operator would either fault or
14211 hang the compiler. Note however, that the AML code for this ACPI
14212 2.0 operator is not yet implemented.
14214 Compiler uses the new AcpiOsGetTimer interface to obtain compile
14217 Implementation of the CreateField operator automatically converts
14218 a reference to a named field within a resource descriptor from a
14219 byte offset to a bit offset if required.
14221 Added some missing named fields from the resource descriptor
14222 support. These are the names that are automatically created by the
14223 compiler to reference fields within a descriptor. They are only
14224 valid at compile time and are not passed through to the AML
14227 Resource descriptor named fields are now typed as Integers and
14228 subject to compile-time typechecking when used in expressions.
14230 ------------------------------------------
14231 Summary of changes for this label: 05_18_01
14233 ACPI CA Core Subsystem:
14235 Fixed a couple of problems in the Field support code where bits
14236 from adjacent fields could be returned along with the proper field
14237 bits. Restructured the field support code to improve performance,
14238 readability and maintainability.
14240 New DEBUG_PRINTP macro automatically inserts the procedure name
14241 into the output, saving hundreds of copies of procedure name
14242 strings within the source, shrinking the memory footprint of the
14243 debug version of the core subsystem.
14245 Source Code Structure:
14247 The source code directory tree was restructured to reflect the
14248 current organization of the component architecture. Some files
14249 and directories have been moved and/or renamed.
14253 Fixed leaking kacpidpc processes.
14255 Fixed queueing event data even when /proc/acpi/event is not
14258 ASL Compiler, version X2020:
14260 Memory allocation performance enhancement - over 24X compile time
14261 improvement on large ASL files. Parse nodes and namestring
14262 buffers are now allocated from a large internal compiler buffer.
14264 The temporary .SRC file is deleted unless the "-s" option is
14267 The "-d" debug output option now sends all output to the .DBG file
14268 instead of the console.
14270 "External" second parameter is now optional
14272 "ElseIf" syntax now properly allows the predicate
14274 Last operand to "Load" now recognized as a Target operand
14276 Debug object can now be used anywhere as a normal object.
14278 ResourceTemplate now returns an object of type BUFFER
14280 EISAID now returns an object of type INTEGER
14282 "Index" now works with a STRING operand
14284 "LoadTable" now accepts optional parameters
14286 "ToString" length parameter is now optional
14288 "Interrupt (ResourceType," parse error fixed.
14290 "Register" with a user-defined region space parse error fixed
14292 Escaped backslash at the end of a string ("\\") scan/parse error
14295 "Revision" is now an object of type INTEGER.
14299 ------------------------------------------
14300 Summary of changes for this label: 05_02_01
14304 /proc/acpi/event now blocks properly.
14306 Removed /proc/sys/acpi. You can still dump your DSDT from
14309 ACPI CA Core Subsystem:
14311 Fixed a problem introduced in the previous label where some of the
14312 "small" resource descriptor types were not recognized.
14314 Improved error messages for the case where an ASL Field is outside
14315 the range of the parent operation region.
14317 ASL Compiler, version X2018:
14320 Added error detection for ASL Fields that extend beyond the length
14321 of the parent operation region (only if the length of the region
14322 is known at compile time.) This includes fields that have a
14323 minimum access width that is smaller than the parent region, and
14324 individual field units that are partially or entirely beyond the
14325 extent of the parent.
14329 ------------------------------------------
14330 Summary of changes for this label: 04_27_01
14332 ACPI CA Core Subsystem:
14334 Fixed a problem where the namespace mutex could be released at the
14335 wrong time during execution of AcpiRemoveAddressSpaceHandler.
14337 Added optional thread ID output for debug traces, to simplify
14338 debugging of multiple threads. Added context switch notification
14339 when the debug code realizes that a different thread is now
14340 executing ACPI code.
14342 Some additional external data types have been prefixed with the
14343 string "ACPI_" for consistency. This may effect existing code.
14344 The data types affected are the external callback typedefs - e.g.,
14346 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
14350 Fixed an issue with the OSL semaphore implementation where a
14351 thread was waking up with an error from receiving a SIGCHLD
14354 Linux version of ACPI CA now uses the system C library for string
14355 manipulation routines instead of a local implementation.
14357 Cleaned up comments and removed TBDs.
14359 ASL Compiler, version X2017:
14361 Enhanced error detection and reporting for all file I/O
14366 Programmer Reference updated to version 1.06.
14370 ------------------------------------------
14371 Summary of changes for this label: 04_13_01
14373 ACPI CA Core Subsystem:
14375 Restructured support for BufferFields and RegionFields.
14376 BankFields support is now fully operational. All known 32-bit
14377 limitations on field sizes have been removed. Both BufferFields
14378 and (Operation) RegionFields are now supported by the same field
14381 Resource support now supports QWORD address and IO resources. The
14382 16/32/64 bit address structures and the Extended IRQ structure
14383 have been changed to properly handle Source Resource strings.
14385 A ThreadId of -1 is now used to indicate a "mutex not acquired"
14386 condition internally and must never be returned by AcpiOsThreadId.
14387 This reserved value was changed from 0 since Unix systems allow a
14392 Driver code reorganized to enhance portability
14394 Added a kernel configuration option to control ACPI_DEBUG
14396 Fixed the EC driver to honor _GLK.
14398 ASL Compiler, version X2016:
14400 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
14401 address space was set to 0, not 0x7f as it should be.
14403 ------------------------------------------
14404 Summary of changes for this label: 03_13_01
14406 ACPI CA Core Subsystem:
14408 During ACPI initialization, the _SB_._INI method is now run if
14411 Notify handler fix - notifies are deferred until the parent method
14412 completes execution. This fixes the "mutex already acquired"
14413 issue seen occasionally.
14415 Part of the "implicit conversion" rules in ACPI 2.0 have been
14416 found to cause compatibility problems with existing ASL/AML. The
14417 convert "result-to-target-type" implementation has been removed
14418 for stores to method Args and Locals. Source operand conversion
14419 is still fully implemented. Possible changes to ACPI 2.0
14420 specification pending.
14422 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
14425 Fix for compiler warnings for 64-bit compiles.
14429 /proc output aligned for easier parsing.
14431 Release-version compile problem fixed.
14433 New kernel configuration options documented in Configure.help.
14435 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
14440 Power resource driver integrated with bus manager.
14442 Fixed kernel fault during active cooling for thermal zones.
14446 The source code tree has been restructured.
14450 ------------------------------------------
14451 Summary of changes for this label: 03_02_01
14453 Linux OS Services Layer (OSL):
14455 Major revision of all Linux-specific code.
14457 Modularized all ACPI-specific drivers.
14459 Added new thermal zone and power resource drivers.
14461 Revamped /proc interface (new functionality is under /proc/acpi).
14463 New kernel configuration options.
14465 Linux known issues:
14467 New kernel configuration options not documented in Configure.help
14471 Module dependencies not currently implemented. If used, they
14472 should be loaded in this order: busmgr, power, ec, system,
14473 processor, battery, ac_adapter, button, thermal.
14475 Modules will not load if CONFIG_MODVERSION is set.
14477 IBM 600E - entering S5 may reboot instead of shutting down.
14479 IBM 600E - Sleep button may generate "Invalid <NULL> context"
14482 Some systems may fail with "execution mutex already acquired"
14485 ACPI CA Core Subsystem:
14487 Added a new OSL Interface, AcpiOsGetThreadId. This was required
14488 for the deadlock detection code. Defined to return a non-zero, 32-
14489 bit thread ID for the currently executing thread. May be a non-
14490 zero constant integer on single-thread systems.
14492 Implemented deadlock detection for internal subsystem mutexes. We
14493 may add conditional compilation for this code (debug only) later.
14495 ASL/AML Mutex object semantics are now fully supported. This
14496 includes multiple acquires/releases by owner and support for the
14498 Mutex SyncLevel parameter.
14500 A new "Force Release" mechanism automatically frees all ASL
14501 Mutexes that have been acquired but not released when a thread
14502 exits the interpreter. This forces conformance to the ACPI spec
14503 ("All mutexes must be released when an invocation exits") and
14504 prevents deadlocked ASL threads. This mechanism can be expanded
14505 (later) to monitor other resource acquisitions if OEM ASL code
14506 continues to misbehave (which it will).
14508 Several new ACPI exception codes have been added for the Mutex
14511 Recursive method calls are now allowed and supported (the ACPI
14512 spec does in fact allow recursive method calls.) The number of
14513 recursive calls is subject to the restrictions imposed by the
14514 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
14517 Implemented support for the SyncLevel parameter for control
14518 methods (ACPI 2.0 feature)
14520 Fixed a deadlock problem when multiple threads attempted to use
14523 Fixed a problem where the string length of a String package
14524 element was not always set in a package returned from
14525 AcpiEvaluateObject.
14527 Fixed a problem where the length of a String package element was
14528 not always included in the length of the overall package returned
14529 from AcpiEvaluateObject.
14531 Added external interfaces (Acpi*) to the ACPI debug memory
14532 manager. This manager keeps a list of all outstanding
14533 allocations, and can therefore detect memory leaks and attempts to
14534 free memory blocks more than once. Useful for code such as the
14535 power manager, etc. May not be appropriate for device drivers.
14536 Performance with the debug code enabled is slow.
14538 The ACPI Global Lock is now an optional hardware element.
14540 ASL Compiler Version X2015:
14542 Integrated changes to allow the compiler to be generated on
14543 multiple platforms.
14545 Linux makefile added to generate the compiler on Linux
14549 All platform-specific headers have been moved to their own
14550 subdirectory, Include/Platform.
14552 New source file added, Interpreter/ammutex.c
14554 New header file, Include/acstruct.h
14558 The programmer reference has been updated for the following new
14559 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
14561 ------------------------------------------
14562 Summary of changes for this label: 02_08_01
14564 Core ACPI CA Subsystem: Fixed a problem where an error was
14565 incorrectly returned if the return resource buffer was larger than
14566 the actual data (in the resource interfaces).
14568 References to named objects within packages are resolved to the
14570 full pathname string before packages are returned directly (via
14571 the AcpiEvaluateObject interface) or indirectly via the resource
14574 Linux OS Services Layer (OSL):
14576 Improved /proc battery interface.
14579 Added C-state debugging output and other miscellaneous fixes.
14581 ASL Compiler Version X2014:
14583 All defined method arguments can now be used as local variables,
14584 including the ones that are not actually passed in as parameters.
14585 The compiler tracks initialization of the arguments and issues an
14586 exception if they are used without prior assignment (just like
14589 The -o option now specifies a filename prefix that is used for all
14590 output files, including the AML output file. Otherwise, the
14591 default behavior is as follows: 1) the AML goes to the file
14592 specified in the DSDT. 2) all other output files use the input
14593 source filename as the base.
14595 ------------------------------------------
14596 Summary of changes for this label: 01_25_01
14598 Core ACPI CA Subsystem: Restructured the implementation of object
14599 store support within the interpreter. This includes support for
14600 the Store operator as well as any ASL operators that include a
14603 Partially implemented support for Implicit Result-to-Target
14604 conversion. This is when a result object is converted on the fly
14605 to the type of an existing target object. Completion of this
14606 support is pending further analysis of the ACPI specification
14607 concerning this matter.
14609 CPU-specific code has been removed from the subsystem (hardware
14612 New Power Management Timer functions added
14614 Linux OS Services Layer (OSL): Moved system state transition code
14615 to the core, fixed it, and modified Linux OSL accordingly.
14617 Fixed C2 and C3 latency calculations.
14620 We no longer use the compilation date for the version message on
14621 initialization, but retrieve the version from AcpiGetSystemInfo().
14623 Incorporated for fix Sony VAIO machines.
14625 Documentation: The Programmer Reference has been updated and
14629 ASL Compiler: Version X2013: Fixed a problem where the line
14630 numbering and error reporting could get out of sync in the
14631 presence of multiple include files.
14633 ------------------------------------------
14634 Summary of changes for this label: 01_15_01
14636 Core ACPI CA Subsystem:
14638 Implemented support for type conversions in the execution of the
14639 ASL Concatenate operator (The second operand is converted to
14640 match the type of the first operand before concatenation.)
14642 Support for implicit source operand conversion is partially
14643 implemented. The ASL source operand types Integer, Buffer, and
14644 String are freely interchangeable for most ASL operators and are
14645 converted by the interpreter on the fly as required. Implicit
14646 Target operand conversion (where the result is converted to the
14647 target type before storing) is not yet implemented.
14649 Support for 32-bit and 64-bit BCD integers is implemented.
14651 Problem fixed where a field read on an aligned field could cause a
14652 read past the end of the field.
14654 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
14655 does not return a value, but the caller expects one. (The ASL
14656 compiler flags this as a warning.)
14661 1. Static typechecking of all operands is implemented. This
14662 prevents the use of invalid objects (such as using a Package where
14663 an Integer is required) at compile time instead of at interpreter
14665 2. The ASL source line is printed with ALL errors and warnings.
14666 3. Bug fix for source EOF without final linefeed.
14667 4. Debug option is split into a parse trace and a namespace trace.
14668 5. Namespace output option (-n) includes initial values for
14669 integers and strings.
14670 6. Parse-only option added for quick syntax checking.
14671 7. Compiler checks for duplicate ACPI name declarations
14674 1. Relaxed typechecking to allow interchangeability between
14675 strings, integers, and buffers. These types are now converted by
14676 the interpreter at runtime.
14677 2. Compiler reports time taken by each internal subsystem in the
14681 ------------------------------------------
14682 Summary of changes for this label: 12_14_00
14686 This is the first official release of the compiler. Since the
14687 compiler requires elements of the Core Subsystem, this label
14688 synchronizes everything.
14690 ------------------------------------------
14691 Summary of changes for this label: 12_08_00
14694 Fixed a problem where named references within the ASL definition
14695 of both OperationRegions and CreateXXXFields did not work
14696 properly. The symptom was an AE_AML_OPERAND_TYPE during
14697 initialization of the region/field. This is similar (but not
14698 related internally) to the problem that was fixed in the last
14701 Implemented both 32-bit and 64-bit support for the BCD ASL
14702 functions ToBCD and FromBCD.
14704 Updated all legal headers to include "2000" in the copyright
14707 ------------------------------------------
14708 Summary of changes for this label: 12_01_00
14710 Fixed a problem where method invocations within the ASL definition
14711 of both OperationRegions and CreateXXXFields did not work
14712 properly. The symptom was an AE_AML_OPERAND_TYPE during
14713 initialization of the region/field:
14715 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
14716 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
14719 Fixed a problem where operators with more than one nested
14720 subexpression would fail. The symptoms were varied, by mostly
14721 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
14722 problem that has gone unnoticed until now.
14724 Subtract (Add (1,2), Multiply (3,4))
14726 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
14727 previous build (The prefix part of a relative path was handled
14730 Fixed a problem where Operation Region initialization failed if
14731 the operation region name was a "namepath" instead of a simple
14732 "nameseg". Symptom was an AE_NO_OPERAND error.
14734 Fixed a problem where an assignment to a local variable via the
14735 indirect RefOf mechanism only worked for the first such
14736 assignment. Subsequent assignments were ignored.
14738 ------------------------------------------
14739 Summary of changes for this label: 11_15_00
14741 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
14742 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
14743 the AML interpreter does NOT have support for the new 2.0 ASL
14744 grammar terms at this time.
14746 All ACPI hardware access is via the GAS structures in the ACPI 2.0
14749 All physical memory addresses across all platforms are now 64 bits
14750 wide. Logical address width remains dependent on the platform
14753 AcpiOsMapMemory interface changed to a 64-bit physical address.
14755 The AML interpreter integer size is now 64 bits, as per the ACPI
14758 For backwards compatibility with ACPI 1.0, ACPI tables with a
14759 revision number less than 2 use 32-bit integers only.
14761 Fixed a problem where the evaluation of OpRegion operands did not
14762 always resolve them to numbers properly.
14764 ------------------------------------------
14765 Summary of changes for this label: 10_20_00
14767 Fix for CBN_._STA issue. This fix will allow correct access to
14768 CBN_ OpRegions when the _STA returns 0x8.
14770 Support to convert ACPI constants (Ones, Zeros, One) to actual
14771 values before a package object is returned
14773 Fix for method call as predicate to if/while construct causing
14774 incorrect if/while behavior
14776 Fix for Else block package lengths sometimes calculated wrong (if
14779 Fix for Processor object length field, was always zero
14781 Table load abort if FACP sanity check fails
14783 Fix for problem with Scope(name) if name already exists
14785 Warning emitted if a named object referenced cannot be found
14786 (resolved) during method execution.
14792 ------------------------------------------
14793 Summary of changes for this label: 9_29_00
14795 New table initialization interfaces: AcpiInitializeSubsystem no
14796 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
14797 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
14798 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
14801 Note: These interface changes require changes to all existing OSDs
14803 The PCI_Config default address space handler is always installed
14804 at the root namespace object.
14806 -------------------------------------------
14807 Summary of changes for this label: 09_15_00
14809 The new initialization architecture is implemented. New
14810 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
14811 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
14813 (Namespace is automatically loaded when a table is loaded)
14815 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
14816 52 bytes to 32 bytes. There is usually one of these for every
14817 namespace object, so the memory savings is significant.
14819 Implemented just-in-time evaluation of the CreateField operators.
14821 Bug fixes for IA-64 support have been integrated.
14823 Additional code review comments have been implemented
14825 The so-called "third pass parse" has been replaced by a final walk
14826 through the namespace to initialize all operation regions (address
14827 spaces) and fields that have not yet been initialized during the
14828 execution of the various _INI and REG methods.
14830 New file - namespace/nsinit.c
14832 -------------------------------------------
14833 Summary of changes for this label: 09_01_00
14835 Namespace manager data structures have been reworked to change the
14836 primary object from a table to a single object. This has
14837 resulted in dynamic memory savings of 3X within the namespace and
14838 2X overall in the ACPI CA subsystem.
14840 Fixed problem where the call to AcpiEvFindPciRootBuses was
14841 inadvertently left commented out.
14843 Reduced the warning count when generating the source with the GCC
14846 Revision numbers added to each module header showing the
14847 SourceSafe version of the file. Please refer to this version
14848 number when giving us feedback or comments on individual modules.
14850 The main object types within the subsystem have been renamed to
14851 clarify their purpose:
14853 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
14854 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
14855 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
14857 NOTE: no changes to the initialization sequence are included in
14860 -------------------------------------------
14861 Summary of changes for this label: 08_23_00
14863 Fixed problem where TerminateControlMethod was being called
14864 multiple times per method
14866 Fixed debugger problem where single stepping caused a semaphore to
14869 Improved performance through additional parse object caching -
14870 added ACPI_EXTENDED_OP type
14872 -------------------------------------------
14873 Summary of changes for this label: 08_10_00
14875 Parser/Interpreter integration: Eliminated the creation of
14876 complete parse trees for ACPI tables and control methods.
14877 Instead, parse subtrees are created and then deleted as soon as
14878 they are processed (Either entered into the namespace or executed
14879 by the interpreter). This reduces the use of dynamic kernel
14880 memory significantly. (about 10X)
14882 Exception codes broken into classes and renumbered. Be sure to
14883 recompile all code that includes acexcep.h. Hopefully we won't
14884 have to renumber the codes again now that they are split into
14885 classes (environment, programmer, AML code, ACPI table, and
14888 Fixed some additional alignment issues in the Resource Manager
14891 Implemented semaphore tracking in the AcpiExec utility, and fixed
14892 several places where mutexes/semaphores were being unlocked
14893 without a corresponding lock operation. There are no known
14894 semaphore or mutex "leaks" at this time.
14896 Fixed the case where an ASL Return operator is used to return an
14899 -------------------------------------------
14900 Summary of changes for this label: 07_28_00
14902 Fixed a problem with the way addresses were calculated in
14903 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
14904 manifested itself when a Field was created with WordAccess or
14905 DwordAccess, but the field unit defined within the Field was less
14907 than a Word or Dword.
14909 Fixed a problem in AmlDumpOperands() module's loop to pull
14910 operands off of the operand stack to display information. The
14911 problem manifested itself as a TLB error on 64-bit systems when
14912 accessing an operand stack with two or more operands.
14914 Fixed a problem with the PCI configuration space handlers where
14915 context was getting confused between accesses. This required a
14916 change to the generic address space handler and address space
14917 setup definitions. Handlers now get both a global handler context
14918 (this is the one passed in by the user when executing
14919 AcpiInstallAddressSpaceHandler() and a specific region context
14920 that is unique to each region (For example, the _ADR, _SEG and
14921 _BBN values associated with a specific region). The generic
14922 function definitions have changed to the following:
14924 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
14925 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
14926 *HandlerContext, // This used to be void *Context void
14927 *RegionContext); // This is an additional parameter
14929 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
14930 RegionHandle, UINT32 Function, void *HandlerContext, void
14931 **RegionContext); // This used to be **ReturnContext
14933 -------------------------------------------
14934 Summary of changes for this label: 07_21_00
14936 Major file consolidation and rename. All files within the
14937 interpreter have been renamed as well as most header files. This
14938 was done to prevent collisions with existing files in the host
14939 OSs -- filenames such as "config.h" and "global.h" seem to be
14940 quite common. The VC project files have been updated. All
14941 makefiles will require modification.
14943 The parser/interpreter integration continues in Phase 5 with the
14944 implementation of a complete 2-pass parse (the AML is parsed
14945 twice) for each table; This avoids the construction of a huge
14946 parse tree and therefore reduces the amount of dynamic memory
14947 required by the subsystem. Greater use of the parse object cache
14948 means that performance is unaffected.
14950 Many comments from the two code reviews have been rolled in.
14952 The 64-bit alignment support is complete.
14954 -------------------------------------------
14955 Summary of changes for this label: 06_30_00
14957 With a nod and a tip of the hat to the technology of yesteryear,
14958 we've added support in the source code for 80 column output
14959 devices. The code is now mostly constrained to 80 columns or
14960 less to support environments and editors that 1) cannot display
14961 or print more than 80 characters on a single line, and 2) cannot
14962 disable line wrapping.
14964 A major restructuring of the namespace data structure has been
14965 completed. The result is 1) cleaner and more
14966 understandable/maintainable code, and 2) a significant reduction
14967 in the dynamic memory requirement for each named ACPI object
14970 -------------------------------------------
14971 Summary of changes for this label: 06_23_00
14973 Linux support has been added. In order to obtain approval to get
14974 the ACPI CA subsystem into the Linux kernel, we've had to make
14975 quite a few changes to the base subsystem that will affect all
14976 users (all the changes are generic and OS- independent). The
14977 effects of these global changes have been somewhat far reaching.
14978 Files have been merged and/or renamed and interfaces have been
14979 renamed. The major changes are described below.
14981 Osd* interfaces renamed to AcpiOs* to eliminate namespace
14982 pollution/confusion within our target kernels. All OSD
14983 interfaces must be modified to match the new naming convention.
14985 Files merged across the subsystem. A number of the smaller source
14986 and header files have been merged to reduce the file count and
14987 increase the density of the existing files. There are too many
14988 to list here. In general, makefiles that call out individual
14989 files will require rebuilding.
14991 Interpreter files renamed. All interpreter files now have the
14992 prefix am* instead of ie* and is*.
14994 Header files renamed: The acapi.h file is now acpixf.h. The
14995 acpiosd.h file is now acpiosxf.h. We are removing references to
14996 the acronym "API" since it is somewhat windowsy. The new name is
14997 "external interface" or xface or xf in the filenames.j
15000 All manifest constants have been forced to upper case (some were
15001 mixed case.) Also, the string "ACPI_" has been prepended to many
15002 (not all) of the constants, typedefs, and structs.
15004 The globals "DebugLevel" and "DebugLayer" have been renamed
15005 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
15007 All other globals within the subsystem are now prefixed with
15008 "AcpiGbl_" Internal procedures within the subsystem are now
15009 prefixed with "Acpi" (with only a few exceptions). The original
15010 two-letter abbreviation for the subcomponent remains after "Acpi"
15011 - for example, CmCallocate became AcpiCmCallocate.
15013 Added a source code translation/conversion utility. Used to
15014 generate the Linux source code, it can be modified to generate
15015 other types of source as well. Can also be used to cleanup
15016 existing source by removing extraneous spaces and blank lines.
15017 Found in tools/acpisrc/*
15019 OsdUnMapMemory was renamed to OsdUnmapMemory and then
15020 AcpiOsUnmapMemory. (UnMap became Unmap).
15022 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
15023 When set to one, this indicates that the caller wants to use the
15025 semaphore as a mutex, not a counting semaphore. ACPI CA uses
15026 both types. However, implementers of this call may want to use
15027 different OS primitives depending on the type of semaphore
15028 requested. For example, some operating systems provide separate
15030 "mutex" and "semaphore" interfaces - where the mutex interface is
15031 much faster because it doesn't have all the overhead of a full
15032 semaphore implementation.
15034 Fixed a deadlock problem where a method that accesses the PCI
15035 address space can block forever if it is the first access to the
15038 -------------------------------------------
15039 Summary of changes for this label: 06_02_00
15041 Support for environments that cannot handle unaligned data
15042 accesses (e.g. firmware and OS environments devoid of alignment
15043 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
15044 been added (via configurable macros) in these three areas: -
15045 Transfer of data from the raw AML byte stream is done via byte
15046 moves instead of word/dword/qword moves. - External objects are
15047 aligned within the user buffer, including package elements (sub-
15048 objects). - Conversion of name strings to UINT32 Acpi Names is now
15051 The Store operator was modified to mimic Microsoft's
15052 implementation when storing to a Buffer Field.
15054 Added a check of the BM_STS bit before entering C3.
15056 The methods subdirectory has been obsoleted and removed. A new
15057 file, cmeval.c subsumes the functionality.
15059 A 16-bit (DOS) version of AcpiExec has been developed. The
15060 makefile is under the acpiexec directory.