1 ----------------------------------------
2 18 April 2013. Summary of changes for version 20130418:
4 This release is available at https://acpica.org/downloads
7 1) ACPICA kernel-resident subsystem:
9 Fixed a possible buffer overrun during some rare but specific field unit
10 read operations. This overrun can only happen if the DSDT version is 1 --
11 meaning that all AML integers are 32 bits -- and the field length is
12 between 33 and 55 bits long. During the read, an internal buffer object is
13 created for the field unit because the field is larger than an integer (32
14 bits). However, in this case, the buffer will be incorrectly written
15 beyond the end because the buffer length is less than the internal minimum
16 of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
17 long, but a full 8 bytes will be written.
19 Updated the Embedded Controller "orphan" _REG method support. This refers
20 to _REG methods under the EC device that have no corresponding operation
21 region. This is allowed by the ACPI specification. This update removes a
22 dependency on the existence an ECDT table. It will execute an orphan _REG
23 method as long as the operation region handler for the EC is installed at
24 the EC device node and not the namespace root. Rui Zhang (original
25 update), Bob Moore (update/integrate).
27 Implemented run-time argument typechecking for all predefined ACPI names
28 (_STA, _BIF, etc.) This change performs object typechecking on all
29 incoming arguments for all predefined names executed via
30 AcpiEvaluateObject. This ensures that ACPI-related device drivers are
31 passing correct object types as well as the correct number of arguments
32 (therefore identifying any issues immediately). Also, the ASL/namespace
33 definition of the predefined name is checked against the ACPI
34 specification for the proper argument count. Adds one new file,
37 Changed an exception code for the ASL UnLoad() operator. Changed the
38 exception code for the case where the input DdbHandle is invalid, from
39 AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
41 Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
42 global makefile. The use of this flag causes compiler errors on earlier
43 versions of GCC, so it has been removed for compatibility.
45 Miscellaneous cleanup:
46 1) Removed some unused/obsolete macros
47 2) Fixed a possible memory leak in the _OSI support
48 3) Removed an unused variable in the predefined name support
49 4) Windows OSL: remove obsolete reference to a memory list field
51 Example Code and Data Size: These are the sizes for the OS-independent
52 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
53 debug version of the code includes the debug output trace mechanism and
54 has a much larger code and data size.
57 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
58 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
60 Non-Debug Version: 95.6K Code, 26.8K Data, 122.4K Total
61 Debug Version: 183.5K Code, 76.6K Data, 260.1K Total
64 2) iASL Compiler/Disassembler and Tools:
66 AcpiExec: Added installation of a handler for the SystemCMOS address
67 space. This prevents control method abort if a method accesses this space.
69 AcpiExec: Added support for multiple EC devices, and now install EC
70 operation region handler(s) at the actual EC device instead of the
71 namespace root. This reflects the typical behavior of host operating
74 AcpiExec: Updated to ensure that all operation region handlers are
75 installed before the _REG methods are executed. This prevents a _REG
76 method from aborting if it accesses an address space has no handler.
77 AcpiExec installs a handler for every possible address space.
79 Debugger: Enhanced the "handlers" command to display non-root handlers.
80 This change enhances the handlers command to display handlers associated
81 with individual devices throughout the namespace, in addition to the
82 currently supported display of handlers associated with the root namespace
85 ASL Test Suite: Several test suite errors have been identified and
86 resolved, reducing the total error count during execution. Chao Guan.
88 ----------------------------------------
89 28 March 2013. Summary of changes for version 20130328:
91 1) ACPICA kernel-resident subsystem:
93 Fixed several possible race conditions with the internal object reference
94 counting mechanism. Some of the external ACPICA interfaces update object
95 reference counts without holding the interpreter or namespace lock. This
96 change adds a spinlock to protect reference count updates on the internal
97 ACPICA objects. Reported by and with assistance from Andriy Gapon
100 FADT support: Removed an extraneous warning for very large GPE register
101 sets. This change removes a size mismatch warning if the legacy length
102 field for a GPE register set is larger than the 64-bit GAS structure can
103 accommodate. GPE register sets can be larger than the 255-bit width
104 limitation of the GAS structure. Linn Crosetto (linn@hp.com).
106 _OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
107 return from this interface. Handles a possible timeout case if
108 ACPI_WAIT_FOREVER is modified by the host to be a value less than
109 "forever". Jung-uk Kim.
111 Predefined name support: Add allowed/required argument type information to
112 the master predefined info table. This change adds the infrastructure to
113 enable typechecking on incoming arguments for all predefined
114 methods/objects. It does not actually contain the code that will fully
115 utilize this information, this is still under development. Also condenses
116 some duplicate code for the predefined names into a new module,
119 Example Code and Data Size: These are the sizes for the OS-independent
120 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
121 debug version of the code includes the debug output trace mechanism and
122 has a much larger code and data size.
125 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
126 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
128 Non-Debug Version: 95.2K Code, 26.4K Data, 121.6K Total
129 Debug Version: 183.0K Code, 76.0K Data, 259.0K Total
132 2) iASL Compiler/Disassembler and Tools:
134 iASL: Implemented a new option to simplify the development of ACPI-related
135 BIOS code. Adds support for a new "offset table" output file. The -so
136 option will create a C table containing the AML table offsets of various
137 named objects in the namespace so that BIOS code can modify them easily at
138 boot time. This can simplify BIOS runtime code by eliminating expensive
139 searches for "magic values", enhancing boot times and adding greater
140 reliability. With assistance from Lee Hamel.
142 iASL: Allow additional predefined names to return zero-length packages.
143 Now, all predefined names that are defined by the ACPI specification to
144 return a "variable-length package of packages" are allowed to return a
145 zero length top-level package. This allows the BIOS to tell the host that
146 the requested feature is not supported, and supports existing BIOS/ASL
149 iASL: Changed the "result not used" warning to an error. This is the case
150 where an ASL operator is effectively a NOOP because the result of the
151 operation is not stored anywhere. For example:
153 There is no target (missing 3rd argument), nor is the function return
154 value used. This is potentially a very serious problem -- since the code
155 was probably intended to do something, but for whatever reason, the value
156 was not stored. Therefore, this issue has been upgraded from a warning to
159 AcpiHelp: Added allowable/required argument types to the predefined names
160 info display. This feature utilizes the recent update to the predefined
163 ----------------------------------------
164 14 February 2013. Summary of changes for version 20130214:
166 1) ACPICA Kernel-resident Subsystem:
168 Fixed a possible regression on some hosts: Reinstated the safe return
169 macros (return_ACPI_STATUS, etc.) that ensure that the argument is
170 evaluated only once. Although these macros are not needed for the ACPICA
171 code itself, they are often used by ACPI-related host device drivers where
172 the safe feature may be necessary.
174 Fixed several issues related to the ACPI 5.0 reduced hardware support
175 (SOC): Now ensure that if the platform declares itself as hardware-reduced
176 via the FADT, the following functions become NOOPs (and always return
177 AE_OK) because ACPI is always enabled by definition on these machines:
183 Dynamic Object Repair: Implemented additional runtime repairs for
184 predefined name return values. Both of these repairs can simplify code in
185 the related device drivers that invoke these methods:
186 1) For the _STR and _MLS names, automatically repair/convert an ASCII
187 string to a Unicode buffer.
188 2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with a
189 lone end tag descriptor in the following cases: A Return(0) was executed,
190 a null buffer was returned, or no object at all was returned (non-slack
191 mode only). Adds a new file, nsconvert.c
192 ACPICA BZ 998. Bob Moore, Lv Zheng.
194 Resource Manager: Added additional code to prevent possible infinite loops
195 while traversing corrupted or ill-formed resource template buffers. Check
196 for zero-length resource descriptors in all code that loops through
197 resource templates (the length field is used to index through the
198 template). This change also hardens the external AcpiWalkResources and
199 AcpiWalkResourceBuffer interfaces.
201 Local Cache Manager: Enhanced the main data structure to eliminate an
202 unnecessary mechanism to access the next object in the list. Actually
203 provides a small performance enhancement for hosts that use the local
204 ACPICA cache manager. Jung-uk Kim.
206 Example Code and Data Size: These are the sizes for the OS-independent
207 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
208 debug version of the code includes the debug output trace mechanism and
209 has a much larger code and data size.
212 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
213 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
215 Non-Debug Version: 95.0K Code, 25.9K Data, 120.9K Total
216 Debug Version: 182.9K Code, 75.6K Data, 258.5K Total
219 2) iASL Compiler/Disassembler and Tools:
221 iASL/Disassembler: Fixed several issues with the definition of the ACPI
222 5.0 RASF table (RAS Feature Table). This change incorporates late changes
223 that were made to the ACPI 5.0 specification.
225 iASL/Disassembler: Added full support for the following new ACPI tables:
226 1) The MTMR table (MID Timer Table)
227 2) The VRTC table (Virtual Real Time Clock Table).
228 Includes header file, disassembler, table compiler, and template support
231 iASL: Implemented compile-time validation of package objects returned by
232 predefined names. This new feature validates static package objects
233 returned by the various predefined names defined to return packages. Both
234 object types and package lengths are validated, for both parent packages
235 and sub-packages, if any. The code is similar in structure and behavior to
236 the runtime repair mechanism within the AML interpreter and uses the
237 existing predefined name information table. Adds a new file, aslprepkg.c.
240 iASL: Implemented auto-detection of binary ACPI tables for disassembly.
241 This feature detects a binary file with a valid ACPI table header and
242 invokes the disassembler automatically. Eliminates the need to
243 specifically invoke the disassembler with the -d option. ACPICA BZ 862.
245 iASL/Disassembler: Added several warnings for the case where there are
246 unresolved control methods during the disassembly. This can potentially
247 cause errors when the output file is compiled, because the disassembler
248 assumes zero method arguments in these cases (it cannot determine the
249 actual number of arguments without resolution/definition of the method).
251 Debugger: Added support to display all resources with a single command.
252 Invocation of the resources command with no arguments will now display all
253 resources within the current namespace.
255 AcpiHelp: Added descriptive text for each ACPICA exception code displayed
258 ----------------------------------------
259 17 January 2013. Summary of changes for version 20130117:
261 1) ACPICA Kernel-resident Subsystem:
263 Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
264 return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
265 objects to return a package containing one integer, most BIOS code returns
266 two integers and the previous code reflects that. However, we also need to
267 support BIOS code that actually implements to the ACPI spec, and this
268 change reflects this.
270 Fixed two issues with the ACPI_DEBUG_PRINT macros:
271 1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
272 C compilers that require this support.
273 2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
274 ACPI_DEBUG is already used by many of the various hosts.
276 Updated all ACPICA copyrights and signons to 2013. Added the 2013
277 copyright to all module headers and signons, including the standard Linux
278 header. This affects virtually every file in the ACPICA core subsystem,
279 iASL compiler, all ACPICA utilities, and the test suites.
281 Example Code and Data Size: These are the sizes for the OS-independent
282 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
283 debug version of the code includes the debug output trace mechanism and
284 has a much larger code and data size.
287 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
288 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
290 Non-Debug Version: 94.5K Code, 25.4K Data, 119.9K Total
291 Debug Version: 182.3K Code, 75.0K Data, 257.3K Total
294 2) iASL Compiler/Disassembler and Tools:
296 Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
297 prevent a possible fault on some hosts. Some C libraries modify the arg
298 pointer parameter to vfprintf making it difficult to call it twice in the
299 AcpiOsVprintf function. Use a local buffer to workaround this issue. This
300 does not affect the Windows OSL since the Win C library does not modify
301 the arg pointer. Chao Guan, Bob Moore.
303 iASL: Fixed a possible infinite loop when the maximum error count is
304 reached. If an output file other than the .AML file is specified (such as
305 a listing file), and the maximum number of errors is reached, do not
306 attempt to flush data to the output file(s) as the compiler is aborting.
307 This can cause an infinite loop as the max error count code essentially
308 keeps calling itself.
310 iASL/Disassembler: Added an option (-in) to ignore NOOP opcodes/operators.
311 Implemented for both the compiler and the disassembler. Often, the NOOP
312 opcode is used as padding for packages that are changed dynamically by the
313 BIOS. When disassembled and recompiled, these NOOPs will cause syntax
314 errors. This option causes the disassembler to ignore all NOOP opcodes
315 (0xA3), and it also causes the compiler to ignore all ASL source code NOOP
318 Debugger: Enhanced the Sleep command to execute all sleep states. This
319 change allows Sleep to be invoked with no arguments and causes the
320 debugger to execute all of the sleep states, 0-5, automatically.
322 ----------------------------------------
323 20 December 2012. Summary of changes for version 20121220:
325 1) ACPICA Kernel-resident Subsystem:
327 Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
328 alternate entry point for AcpiWalkResources and improves the usability of
329 the resource manager by accepting as input a buffer containing the output
330 of either a _CRS, _PRS, or _AEI method. The key functionality is that the
331 input buffer is not deleted by this interface so that it can be used by
332 the host later. See the ACPICA reference for details.
334 Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
335 (DSDT version < 2). The constant will be truncated and this warning
336 reflects that behavior.
338 Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
339 ExtendedInterrupt, and GpioInt descriptors. This change adds support to
340 both get and set the new wake bit in these descriptors, separately from
341 the existing share bit. Reported by Aaron Lu.
343 Interpreter: Fix Store() when an implicit conversion is not possible. For
344 example, in the cases such as a store of a string to an existing package
345 object, implement the store as a CopyObject(). This is a small departure
346 from the ACPI specification which states that the control method should be
347 aborted in this case. However, the ASLTS suite depends on this behavior.
349 Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
350 macros: check if debug output is currently enabled as soon as possible to
351 minimize performance impact if debug is in fact not enabled.
353 Source code restructuring: Cleanup to improve modularity. The following
354 new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
355 psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
356 Associated makefiles and project files have been updated.
358 Changed an exception code for LoadTable operator. For the case where one
359 of the input strings is too long, change the returned exception code from
360 AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
362 Fixed a possible memory leak in dispatcher error path. On error, delete
363 the mutex object created during method mutex creation. Reported by
364 tim.gardner@canonical.com.
366 Example Code and Data Size: These are the sizes for the OS-independent
367 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
368 debug version of the code includes the debug output trace mechanism and
369 has a much larger code and data size.
372 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
373 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
375 Non-Debug Version: 94.5K Code, 25.5K Data, 120.0K Total
376 Debug Version: 182.2K Code, 74.9K Data, 257.1K Total
379 2) iASL Compiler/Disassembler and Tools:
381 iASL: Disallow a method call as argument to the ObjectType ASL operator.
382 This change tracks an errata to the ACPI 5.0 document. The AML grammar
383 will not allow the interpreter to differentiate between a method and a
384 method invocation when these are used as an argument to the ObjectType
385 operator. The ACPI specification change is to disallow a method invocation
386 (UserTerm) for the ObjectType operator.
388 Finish support for the TPM2 and CSRT tables in the headers, table
389 compiler, and disassembler.
391 Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
392 always expires immediately if the semaphore is not available. The original
393 code was using a relative-time timeout, but sem_timedwait requires the use
396 iASL: Added a remark if the Timer() operator is used within a 32-bit
397 table. This operator returns a 64-bit time value that will be truncated
398 within a 32-bit table.
400 iASL Source code restructuring: Cleanup to improve modularity. The
401 following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
402 aslmethod.c, and aslfileio.c. Associated makefiles and project files have
406 ----------------------------------------
407 14 November 2012. Summary of changes for version 20121114:
409 1) ACPICA Kernel-resident Subsystem:
411 Implemented a performance enhancement for ACPI/AML Package objects. This
412 change greatly increases the performance of Package objects within the
413 interpreter. It changes the processing of reference counts for packages by
414 optimizing for the most common case where the package sub-objects are
415 either Integers, Strings, or Buffers. Increases the overall performance of
416 the ASLTS test suite by 1.5X (Increases the Slack Mode performance by 2X.)
417 Chao Guan. ACPICA BZ 943.
419 Implemented and deployed common macros to extract flag bits from resource
420 descriptors. Improves readability and maintainability of the code. Fixes a
421 problem with the UART serial bus descriptor for the number of data bits
422 flags (was incorrectly 2 bits, should be 3).
424 Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
425 of the macros and changed the SETx macros to the style of (destination,
426 source). Also added ACPI_CASTx companion macros. Lv Zheng.
428 Example Code and Data Size: These are the sizes for the OS-independent
429 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
430 debug version of the code includes the debug output trace mechanism and
431 has a much larger code and data size.
434 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
435 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
437 Non-Debug Version: 94.3K Code, 25.3K Data, 119.6K Total
438 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
441 2) iASL Compiler/Disassembler and Tools:
443 Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
444 adds the ShareAndWake and ExclusiveAndWake flags which were added to the
445 Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
447 Disassembler: Fixed a problem with external declaration generation. Fixes
448 a problem where an incorrect pathname could be generated for an external
449 declaration if the original reference to the object includes leading
450 carats (^). ACPICA BZ 984.
452 Debugger: Completed a major update for the Disassemble<method> command.
453 This command was out-of-date and did not properly disassemble control
454 methods that had any reasonable complexity. This fix brings the command up
455 to the same level as the rest of the disassembler. Adds one new file,
456 dmdeferred.c, which is existing code that is now common with the main
457 disassembler and the debugger disassemble command. ACPICA MZ 978.
459 iASL: Moved the parser entry prototype to avoid a duplicate declaration.
460 Newer versions of Bison emit this prototype, so moved the prototype out of
461 the iASL header to where it is actually used in order to avoid a duplicate
464 iASL/Tools: Standardized use of the stream I/O functions:
465 1) Ensure check for I/O error after every fopen/fread/fwrite
466 2) Ensure proper order of size/count arguments for fread/fwrite
467 3) Use test of (Actual != Requested) after all fwrite, and most fread
468 4) Standardize I/O error messages
469 Improves reliability and maintainability of the code. Bob Moore, Lv Zheng.
472 Disassembler: Prevent duplicate External() statements. During generation
473 of external statements, detect similar pathnames that are actually
474 duplicates such as these:
477 Remove all leading '\' characters from pathnames during the external
478 statement generation so that duplicates will be detected and tossed.
481 Tools: Replace low-level I/O with stream I/O functions. Replace
482 open/read/write/close with the stream I/O equivalents
483 fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
486 AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
487 name header so that AcpiXtract recognizes the output file/table.
489 iASL: Remove obsolete -2 option flag. Originally intended to force the
490 compiler/disassembler into an ACPI 2.0 mode, this was never implemented
491 and the entire concept is now obsolete.
493 ----------------------------------------
494 18 October 2012. Summary of changes for version 20121018:
497 1) ACPICA Kernel-resident Subsystem:
499 Updated support for the ACPI 5.0 MPST table. Fixes some problems
500 introduced by late changes to the table as it was added to the ACPI 5.0
501 specification. Includes header, disassembler, and data table compiler
502 support as well as a new version of the MPST template.
504 AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
505 5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
506 methods: _HID, _CID, and _UID.
508 Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
509 ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
510 name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
511 names for their various drivers. Affects the AcpiGetObjectInfo external
512 interface, and other internal interfaces as well.
514 Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
515 This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
516 on machines that support non-aligned transfers. Optimizes for this case
517 rather than using a strncpy. With assistance from Zheng Lv.
519 Resource Manager: Small fix for buffer size calculation. Fixed a one byte
520 error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
522 Added a new debug print message for AML mutex objects that are force-
523 released. At control method termination, any currently acquired mutex
524 objects are force-released. Adds a new debug-only message for each one
527 Audited/updated all ACPICA return macros and the function debug depth
528 counter: 1) Ensure that all functions that use the various TRACE macros
529 also use the appropriate ACPICA return macros. 2) Ensure that all normal
530 return statements surround the return expression (value) with parens to
531 ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
532 Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
534 Global source code changes/maintenance: All extra lines at the start and
535 end of each source file have been removed for consistency. Also, within
536 comments, all new sentences start with a single space instead of a double
537 space, again for consistency across the code base.
539 Example Code and Data Size: These are the sizes for the OS-independent
540 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
541 debug version of the code includes the debug output trace mechanism and
542 has a much larger code and data size.
545 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
546 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
548 Non-Debug Version: 93.9K Code, 25.2K Data, 119.1K Total
549 Debug Version: 175.5K Code, 74.5K Data, 250.0K Total
552 2) iASL Compiler/Disassembler and Tools:
554 AcpiExec: Improved the algorithm used for memory leak/corruption
555 detection. Added some intelligence to the code that maintains the global
556 list of allocated memory. The list is now ordered by allocated memory
557 address, significantly improving performance. When running AcpiExec on
558 the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
559 on the platform and/or the environment. Note, this performance
560 enhancement affects the AcpiExec utility only, not the kernel-resident
563 Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
564 the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
565 incorrect table offset reported for invalid opcodes. Report the original
566 32-bit value for bad ACPI_NAMEs (as well as the repaired name.)
568 Disassembler: Enhanced the -vt option to emit the binary table data in
569 hex format to assist with debugging.
571 Fixed a potential filename buffer overflow in osunixdir.c. Increased the
572 size of file structure. Colin Ian King.
574 ----------------------------------------
575 13 September 2012. Summary of changes for version 20120913:
578 1) ACPICA Kernel-resident Subsystem:
580 ACPI 5.0: Added two new notify types for the Hardware Error Notification
581 Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
585 Table Manager: Merged/removed duplicate code in the root table resize
586 functions. One function is external, the other is internal. Lv Zheng,
590 Makefiles: Completely removed the obsolete "Linux" makefiles under
591 acpica/generate/linux. These makefiles are obsolete and have been replaced
593 the generic unix makefiles under acpica/generate/unix.
595 Makefiles: Ensure that binary files always copied properly. Minor rule
597 to ensure that the final binary output files are always copied up to the
598 appropriate binary directory (bin32 or bin64.)
600 Example Code and Data Size: These are the sizes for the OS-independent
601 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
603 version of the code includes the debug output trace mechanism and has a
605 larger code and data size.
608 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
609 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
611 Non-Debug Version: 93.7K Code, 25.3K Data, 119.0K Total
612 Debug Version: 175.0K Code, 74.4K Data, 249.4K Total
615 2) iASL Compiler/Disassembler and Tools:
617 Disassembler: Fixed a possible fault during the disassembly of resource
618 descriptors when a second parse is required because of the invocation of
619 external control methods within the table. With assistance from
620 adq@lidskialf.net. ACPICA BZ 976.
622 iASL: Fixed a namepath optimization problem. An error can occur if the
624 node that contains the namepath to be optimized does not have a parent
626 that is a named object. This change fixes the problem.
628 iASL: Fixed a regression where the AML file is not deleted on errors. The
630 output file should be deleted if there are any errors during the compiler.
632 only exception is if the -f (force output) option is used. ACPICA BZ 974.
634 iASL: Added a feature to automatically increase internal line buffer
636 Via realloc(), automatically increase the internal line buffer sizes as
637 necessary to support very long source code lines. The current version of
639 preprocessor requires a buffer long enough to contain full source code
641 This change increases the line buffer(s) if the input lines go beyond the
642 current buffer size. This eliminates errors that occurred when a source
644 line was longer than the buffer.
646 iASL: Fixed a problem with constant folding in method declarations. The
647 SyncLevel term is a ByteConstExpr, and incorrect code would be generated
649 Type3 opcode was used.
651 Debugger: Improved command help support. For incorrect argument count,
653 full help for the command. For help command itself, allow an argument to
656 Test Suites: Several bug fixes for the ASLTS suite reduces the number of
657 errors during execution of the suite. Guan Chao.
659 ----------------------------------------
660 16 August 2012. Summary of changes for version 20120816:
663 1) ACPICA Kernel-resident Subsystem:
665 Removed all use of the deprecated _GTS and _BFS predefined methods. The
667 (Going To Sleep) and _BFS (Back From Sleep) methods are essentially
668 deprecated and will probably be removed from the ACPI specification.
670 does not invoke them, and reportedly never will. The final nail in the
672 is that the ACPI specification states that these methods must be run with
673 interrupts off, which is not going to happen in a kernel interpreter.
675 Linux has removed all use of the methods also. It was discovered that
676 invoking these functions caused failures on some machines, probably
678 they were never tested since Windows does not call them. Affects two
680 interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
683 Implemented support for complex bit-packed buffers returned from the _PLD
684 (Physical Location of Device) predefined method. Adds a new external
685 interface, AcpiDecodePldBuffer that parses the buffer into a more usable C
686 structure. Note: C Bitfields cannot be used for this type of predefined
687 structure since the memory layout of individual bitfields is not defined
689 the C language. In addition, there are endian concerns where a compiler
691 change the bitfield ordering based on the machine type. The new ACPICA
692 interface eliminates these issues, and should be called after _PLD is
693 executed. ACPICA BZ 954.
695 Implemented a change to allow a scope change to root (via "Scope (\)")
697 execution of module-level ASL code (code that is executed at table load
700 Added the Windows8/Server2012 string for the _OSI method. This change adds
702 new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
705 Added header support for the new ACPI tables DBG2 (Debug Port Table Type
707 and CSRT (Core System Resource Table).
709 Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
710 names. This simplifies access to the buffers returned by these predefined
711 names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
713 GPE support: Removed an extraneous parameter from the various low-level
714 internal GPE functions. Tang Feng.
716 Removed the linux makefiles from the unix packages. The generate/linux
717 makefiles are obsolete and have been removed from the unix tarball release
718 packages. The replacement makefiles are under generate/unix, and there is
720 top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
722 Updates for Unix makefiles:
723 1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
724 2) Update linker flags (move to end of command line) for AcpiExec utility.
727 Split ACPICA initialization functions to new file, utxfinit.c. Split from
728 utxface.c to improve modularity and reduce file size.
730 Example Code and Data Size: These are the sizes for the OS-independent
731 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
732 debug version of the code includes the debug output trace mechanism and
734 much larger code and data size.
737 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
738 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
740 Non-Debug Version: 93.8K Code, 25.3K Data, 119.1K Total
741 Debug Version: 175.7K Code, 74.8K Data, 250.5K Total
744 2) iASL Compiler/Disassembler and Tools:
746 iASL: Fixed a problem with constant folding for fixed-length constant
747 expressions. The constant-folding code was not being invoked for constant
748 expressions that allow the use of type 3/4/5 opcodes to generate constants
749 for expressions such as ByteConstExpr, WordConstExpr, etc. This could
751 in the generation of invalid AML bytecode. ACPICA BZ 970.
753 iASL: Fixed a generation issue on newer versions of Bison. Newer versions
754 apparently automatically emit some of the necessary externals. This change
755 handles these versions in order to eliminate generation warnings.
757 Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
759 Disassembler: Add support to decode _PLD buffers. The decoded buffer
761 within comments in the output file.
763 Debugger: Fixed a regression with the "Threads" command where
764 AE_BAD_PARAMETER was always returned.
766 ----------------------------------------
767 11 July 2012. Summary of changes for version 20120711:
769 1) ACPICA Kernel-resident Subsystem:
771 Fixed a possible fault in the return package object repair code. Fixes a
772 problem that can occur when a lone package object is wrapped with an outer
773 package object in order to force conformance to the ACPI specification.
775 affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
779 Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
780 PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
781 ARB_DIS bit must be implemented in the host-dependent C3 processor power
783 support. Note, ARB_DIS is obsolete and only applies to older chipsets,
785 Intel and other vendors. (for Intel: ICH4-M and earlier)
787 This change removes the code to disable/enable bus master arbitration
789 suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
791 resume problems on some machines. The change has been in use for over
795 Implemented two new external interfaces to support host-directed dynamic
797 table load and unload. They are intended to simplify the host
800 AcpiLoadTable: Load an SSDT from a buffer into the namespace.
801 AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
803 See the ACPICA reference for additional details. Adds one new file,
804 components/tables/tbxfload.c
806 Implemented and deployed two new interfaces for errors and warnings that
808 known to be caused by BIOS/firmware issues:
809 AcpiBiosError: Prints "ACPI Firmware Error" message.
810 AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
811 Deployed these new interfaces in the ACPICA Table Manager code for ACPI
813 and FADT errors. Additional deployment to be completed as appropriate in
815 future. The associated conditional macros are ACPI_BIOS_ERROR and
816 ACPI_BIOS_WARNING. See the ACPICA reference for additional details. ACPICA
820 Implicit notify support: ensure that no memory allocation occurs within a
821 critical region. This fix moves a memory allocation outside of the time
823 spinlock is held. Fixes issues on systems that do not allow this behavior.
826 Split exception code utilities and tables into a new file,
829 Example Code and Data Size: These are the sizes for the OS-independent
830 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
832 version of the code includes the debug output trace mechanism and has a
834 larger code and data size.
837 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
838 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
840 Non-Debug Version: 93.5K Code, 25.3K Data, 118.8K Total
841 Debug Version: 173.7K Code, 74.0K Data, 247.7K Total
844 2) iASL Compiler/Disassembler and Tools:
846 iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
850 Debugger: Enhanced the "tables" command to emit additional information
852 the current set of ACPI tables, including the owner ID and flags decode.
854 Debugger: Reimplemented the "unload" command to use the new
855 AcpiUnloadParentTable external interface. This command was disable
857 due to need for an unload interface.
859 AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
861 will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
863 ----------------------------------------
864 20 June 2012. Summary of changes for version 20120620:
867 1) ACPICA Kernel-resident Subsystem:
869 Implemented support to expand the "implicit notify" feature to allow
871 devices to be notified by a single GPE. This feature automatically
873 runtime device notification in the absence of a BIOS-provided GPE control
874 method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
876 provided by ACPICA for Windows compatibility, and is a workaround for BIOS
878 code errors. See the description of the AcpiSetupGpeForWake interface in
880 APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
882 Changed some comments and internal function names to simplify and ensure
883 correctness of the Linux code translation. No functional changes.
885 Example Code and Data Size: These are the sizes for the OS-independent
886 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
888 version of the code includes the debug output trace mechanism and has a
890 larger code and data size.
893 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
894 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
896 Non-Debug Version: 93.1K Code, 25.1K Data, 118.2K Total
897 Debug Version: 172.9K Code, 73.6K Data, 246.5K Total
900 2) iASL Compiler/Disassembler and Tools:
902 Disassembler: Added support to emit short, commented descriptions for the
904 predefined names in order to improve the readability of the disassembled
905 output. ACPICA BZ 959. Changes include:
906 1) Emit descriptions for all standard predefined names (_INI, _STA,
909 2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
910 3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
913 AcpiSrc: Fixed several long-standing Linux code translation issues.
915 descriptions in function headers are now translated properly to lower case
917 underscores. ACPICA BZ 961. Also fixes translation problems such as these:
922 local_fADT -> local_FADT
923 execute_oSI -> execute_OSI
925 iASL: Fixed a problem where null bytes were inadvertently emitted into
929 iASL: Added the existing debug options to the standard help screen. There
931 no longer two different help screens. ACPICA BZ 957.
933 AcpiHelp: Fixed some typos in the various predefined name descriptions.
935 expand some of the descriptions where appropriate.
937 iASL: Fixed the -ot option (display compile times/statistics). Was not
939 properly for standard output; only worked for the debug file case.
941 ----------------------------------------
942 18 May 2012. Summary of changes for version 20120518:
945 1) ACPICA Core Subsystem:
947 Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
949 to block until asynchronous events such as notifies and GPEs have
951 Within ACPICA, it is only called before a notify or GPE handler is
952 removed/uninstalled. It also may be useful for the host OS within related
953 drivers such as the Embedded Controller driver. See the ACPICA reference
955 additional information. ACPICA BZ 868.
957 ACPI Tables: Added a new error message for a possible overflow failure
959 the conversion of FADT 32-bit legacy register addresses to internal common
961 bit GAS structure representation. The GAS has a one-byte "bit length"
963 thus limiting the register length to 255 bits. ACPICA BZ 953.
965 Example Code and Data Size: These are the sizes for the OS-independent
966 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
968 version of the code includes the debug output trace mechanism and has a
970 larger code and data size.
973 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
974 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
976 Non-Debug Version: 93.0K Code, 25.1K Data, 118.1K Total
977 Debug Version: 172.7K Code, 73.6K Data, 246.3K Total
980 2) iASL Compiler/Disassembler and Tools:
982 iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
984 This keyword was added late in the ACPI 5.0 release cycle and was not
985 implemented until now.
987 Disassembler: Added support for Operation Region externals. Adds missing
988 support for operation regions that are defined in another table, and
989 referenced locally via a Field or BankField ASL operator. Now generates
991 correct External statement.
993 Disassembler: Several additional fixes for the External() statement
995 related to some ASL operators. Also, order the External() statements
996 alphabetically in the disassembler output. Fixes the External() generation
998 the Create* field, Alias, and Scope operators:
999 1) Create* buffer field operators - fix type mismatch warning on
1001 2) Alias - implement missing External support
1002 3) Scope - fix to make sure all necessary externals are emitted.
1004 iASL: Improved pathname support. For include files, merge the prefix
1006 with the file pathname and eliminate unnecessary components. Convert
1007 backslashes in all pathnames to forward slashes, for readability. Include
1009 pathname changes affect both #include and Include() type operators.
1011 iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
1013 of a valid line by inserting a newline and then returning the EOF during
1015 next call to GetNextLine. Prevents the line from being ignored due to EOF
1018 iASL: Implemented some changes to enhance the IDE support (-vi option.)
1020 and Warning messages are now correctly recognized for both the source code
1021 browser and the global error and warning counts.
1023 ----------------------------------------
1024 20 April 2012. Summary of changes for version 20120420:
1027 1) ACPICA Core Subsystem:
1029 Implemented support for multiple notify handlers. This change adds support
1031 allow multiple system and device notify handlers on Device, Thermal Zone,
1033 Processor objects. This can simplify the host OS notification
1035 Also re-worked and restructured the entire notify support code to simplify
1036 handler installation, handler removal, notify event queuing, and notify
1037 dispatch to handler(s). Note: there can still only be two global notify
1038 handlers - one for system notifies and one for device notifies. There are
1040 changes to the existing handler install/remove interfaces. Lin Ming, Bob
1041 Moore, Rafael Wysocki.
1043 Fixed a regression in the package repair code where the object reference
1044 count was calculated incorrectly. Regression was introduced in the commit
1045 "Support to add Package wrappers".
1047 Fixed a couple possible memory leaks in the AML parser, in the error
1049 path. Jesper Juhl, Lin Ming.
1051 Example Code and Data Size: These are the sizes for the OS-independent
1052 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1053 debug version of the code includes the debug output trace mechanism and
1055 much larger code and data size.
1058 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
1059 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
1061 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
1062 Debug Version: 172.6K Code, 73.4K Data, 246.0K Total
1065 2) iASL Compiler/Disassembler and Tools:
1067 iASL: Fixed a problem with the resource descriptor support where the
1069 of the StartDependentFn and StartDependentFnNoPrio descriptors were not
1070 included in cumulative descriptor offset, resulting in incorrect values
1072 resource tags within resource descriptors appearing after a
1074 descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
1076 iASL and Preprocessor: Implemented full support for the #line directive to
1077 correctly track original source file line numbers through the .i
1079 output file - for error and warning messages.
1081 iASL: Expand the allowable byte constants for address space IDs.
1083 the allowable range was 0x80-0xFF (user-defined spaces), now the range is
1084 0x0A-0xFF to allow for custom and new IDs without changing the compiler.
1086 iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
1088 iASL: Add option to completely disable the preprocessor (-Pn).
1090 iASL: Now emit all error/warning messages to standard error (stderr) by
1091 default (instead of the previous stdout).
1093 ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
1095 for resource descriptor offset fix above. Update/cleanup error output
1096 routines. Enable and send iASL errors/warnings to an error logfile
1097 (error.txt). Send all other iASL output to a logfile (compiler.txt). Fixed
1098 several extraneous "unrecognized operator" messages.
1100 ----------------------------------------
1101 20 March 2012. Summary of changes for version 20120320:
1104 1) ACPICA Core Subsystem:
1106 Enhanced the sleep/wake interfaces to optionally execute the _GTS method
1107 (Going To Sleep) and the _BFS method (Back From Sleep). Windows apparently
1108 does not execute these methods, and therefore these methods are often
1109 untested. It has been seen on some systems where the execution of these
1110 methods causes errors and also prevents the machine from entering S5. It
1112 therefore suggested that host operating systems do not execute these
1114 by default. In the future, perhaps these methods can be optionally
1116 based on the age of the system and/or what is the newest version of
1118 that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
1120 AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
1123 Fixed a problem where the length of the local/common FADT was set too
1125 The local FADT table length cannot be set to the common length until the
1126 original length has been examined. There is code that checks the table
1128 and sets various fields appropriately. This can affect older machines with
1129 early FADT versions. For example, this can cause inadvertent writes to the
1130 CST_CNT register. Julian Anastasov.
1132 Fixed a mapping issue related to a physical table override. Use the
1134 mapping mechanism for tables loaded via the physical override OSL
1136 This allows for early mapping before the virtual memory manager is
1138 Thomas Renninger, Bob Moore.
1140 Enhanced the automatic return-object repair code: Repair a common problem
1142 predefined methods that are defined to return a variable-length Package of
1143 sub-objects. If there is only one sub-object, some BIOS ASL code
1145 simply returns the single object instead of a Package with one sub-object.
1146 This new support will repair this error by wrapping a Package object
1148 the original object, creating the correct and expected Package with one
1150 object. Names that can be repaired in this manner include: _ALR, _CSD,
1152 _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
1155 Changed the exception code returned for invalid ACPI paths passed as
1156 parameters to external interfaces such as AcpiEvaluateObject. Was
1157 AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
1159 Example Code and Data Size: These are the sizes for the OS-independent
1160 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1162 version of the code includes the debug output trace mechanism and has a
1164 larger code and data size.
1167 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
1168 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
1170 Non-Debug Version: 92.9K Code, 25.0K Data, 117.9K Total
1171 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
1174 2) iASL Compiler/Disassembler and Tools:
1176 iASL: Added the infrastructure and initial implementation of a integrated
1178 like preprocessor. This will simplify BIOS development process by
1180 the need for a separate preprocessing step during builds. On Windows, it
1182 eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
1183 features including full #define() macro support are still under
1185 These preprocessor directives are supported:
1198 In addition, these new command line options are supported:
1199 -D <symbol> Define symbol for preprocessor use
1200 -li Create preprocessed output file (*.i)
1201 -P Preprocess only and create preprocessor output file (*.i)
1203 Table Compiler: Fixed a problem where the equals operator within an
1205 did not work properly.
1207 Updated iASL to use the current versions of Bison/Flex. Updated the
1209 project file to invoke these tools from the standard location. ACPICA BZ
1212 Flex for Windows: V2.5.4
1213 Bison for Windows: V2.4.1
1215 ----------------------------------------
1216 15 February 2012. Summary of changes for version 20120215:
1219 1) ACPICA Core Subsystem:
1221 There have been some major changes to the sleep/wake support code, as
1222 described below (a - e).
1224 a) The AcpiLeaveSleepState has been split into two interfaces, similar to
1225 AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
1226 AcpiLeaveSleepStatePrep. This allows the host to perform actions between
1228 time the _BFS method is called and the _WAK method is called. NOTE: all
1230 must update their wake/resume code or else sleep/wake will not work
1234 b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
1236 method. Some machines require that the GPEs are enabled before the _WAK
1238 is executed. Thomas Renninger.
1240 c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status) bit.
1241 Some BIOS code assumes that WAK_STS will be cleared on resume and use it
1243 determine whether the system is rebooting or resuming. Matthew Garrett.
1245 d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
1247 match the ACPI specification requirement. Rafael Wysocki.
1249 e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
1250 registers within the V5 FADT. This support adds two new files:
1251 hardware/hwesleep.c implements the support for the new registers. Moved
1253 sleep/wake external interfaces to hardware/hwxfsleep.c.
1256 Added a new OSL interface for ACPI table overrides,
1257 AcpiOsPhysicalTableOverride. This interface allows the host to override a
1258 table via a physical address, instead of the logical address required by
1259 AcpiOsTableOverride. This simplifies the host implementation. Initial
1260 implementation by Thomas Renninger. The ACPICA implementation creates a
1262 shared function for table overrides that attempts both a logical and a
1265 Expanded the OSL memory read/write interfaces to 64-bit data
1266 (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
1267 transfer support for GAS register structures passed to AcpiRead and
1270 Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
1272 build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
1274 See the ACPICA reference for details. ACPICA BZ 942. This option removes
1276 10% of the code and 5% of the static data, and the following hardware ACPI
1277 features become unavailable:
1278 PM Event and Control registers
1279 SCI interrupt (and handler)
1281 General Purpose Events (GPEs)
1284 FACS table (Waking vectors and Global Lock)
1286 Updated the unix tarball directory structure to match the ACPICA git
1288 tree. This ensures that the generic unix makefiles work properly (in
1289 generate/unix). Also updated the Linux makefiles to match. ACPICA BZ 867.
1291 Updated the return value of the _REV predefined method to integer value 5
1293 reflect ACPI 5.0 support.
1295 Moved the external ACPI PM timer interface prototypes to the public
1297 file where they belong.
1299 Example Code and Data Size: These are the sizes for the OS-independent
1300 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1302 version of the code includes the debug output trace mechanism and has a
1304 larger code and data size.
1307 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
1308 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
1310 Non-Debug Version: 93.0K Code, 25.0K Data, 118.0K Total
1311 Debug Version: 172.5K Code, 73.2K Data, 245.7K Total
1314 2) iASL Compiler/Disassembler and Tools:
1316 Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
1317 descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
1318 incorrectly displayed.
1320 AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
1323 ----------------------------------------
1324 11 January 2012. Summary of changes for version 20120111:
1327 1) ACPICA Core Subsystem:
1329 Implemented a new mechanism to allow host device drivers to check for
1331 range conflicts with ACPI Operation Regions. Both SystemMemory and
1333 address spaces are supported. A new external interface,
1334 AcpiCheckAddressRange,
1335 allows drivers to check an address range against the ACPI namespace. See
1337 ACPICA reference for additional details. Adds one new file,
1338 utilities/utaddress.c. Lin Ming, Bob Moore.
1340 Fixed several issues with the ACPI 5.0 FADT support: Add the sleep Control
1342 Status registers, update the ACPI 5.0 flags, and update internal data
1343 structures to handle an FADT larger than 256 bytes. The size of the ACPI
1347 Updated all ACPICA copyrights and signons to 2012. Added the 2012
1349 all module headers and signons, including the standard Linux header. This
1350 affects virtually every file in the ACPICA core subsystem, iASL compiler,
1352 all ACPICA utilities.
1354 Example Code and Data Size: These are the sizes for the OS-independent
1355 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1357 version of the code includes the debug output trace mechanism and has a
1359 larger code and data size.
1362 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
1363 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
1365 Non-Debug Version: 92.8K Code, 24.9K Data, 117.7K Total
1366 Debug Version: 171.7K Code, 72.9K Data, 244.5K Total
1369 2) iASL Compiler/Disassembler and Tools:
1371 Disassembler: fixed a problem with the automatic resource tag generation
1372 support. Fixes a problem where the resource tags are inadvertently not
1373 constructed if the table being disassembled contains external references
1375 control methods. Moved the actual construction of the tags to after the
1377 namespace is constructed (after 2nd parse is invoked due to external
1379 method references.) ACPICA BZ 941.
1381 Table Compiler: Make all "generic" operators caseless. These are the
1383 like UINT8, String, etc. Making these caseless improves ease-of-use.
1387 ----------------------------------------
1388 23 November 2011. Summary of changes for version 20111123:
1390 0) ACPI 5.0 Support:
1392 This release contains full support for the ACPI 5.0 specification, as
1395 Reduced Hardware Support:
1396 -------------------------
1398 This support allows for ACPI systems without the usual ACPI hardware. This
1399 support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
1401 not attempt to initialize or use any of the usual ACPI hardware. Note,
1403 this flag is set, all of the following ACPI hardware is assumed to be not
1404 present and is not initialized or accessed:
1406 General Purpose Events (GPEs)
1407 Fixed Events (PM1a/PM1b and PM Control)
1408 Power Management Timer and Console Buttons (power/sleep)
1409 Real-time Clock Alarm
1411 System Control Interrupt (SCI)
1412 The FACS is assumed to be non-existent
1417 All new tables and updates to existing tables are fully supported in the
1418 ACPICA headers (for use by device drivers), the disassembler, and the iASL
1419 Data Table Compiler. ACPI 5.0 defines these new tables:
1421 BGRT /* Boot Graphics Resource Table */
1422 DRTM /* Dynamic Root of Trust for Measurement table */
1423 FPDT /* Firmware Performance Data Table */
1424 GTDT /* Generic Timer Description Table */
1425 MPST /* Memory Power State Table */
1426 PCCT /* Platform Communications Channel Table */
1427 PMTT /* Platform Memory Topology Table */
1428 RASF /* RAS Feature table */
1430 Operation Regions/SpaceIDs:
1431 ---------------------------
1433 All new operation regions are fully supported by the iASL compiler, the
1434 disassembler, and the ACPICA runtime code (for dispatch to region
1436 The new operation region Space IDs are:
1441 Resource Descriptors:
1442 ---------------------
1444 All new ASL resource descriptors are fully supported by the iASL compiler,
1446 ASL/AML disassembler, and the ACPICA runtime Resource Manager code
1448 all new predefined resource tags). New descriptors are:
1457 ASL/AML Operators, New and Modified:
1458 ------------------------------------
1460 One new operator is added, the Connection operator, which is used to
1462 a GeneralPurposeIo or GenericSerialBus resource descriptor with individual
1463 field objects within an operation region. Several new protocols are
1465 with the AccessAs operator. All are fully supported by the iASL compiler,
1466 disassembler, and runtime ACPICA AML interpreter:
1468 Connection // Declare Field Connection attributes
1469 AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol
1470 AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes Protocol
1471 AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
1472 RawDataBuffer // Data type for Vendor Data
1475 Predefined ASL/AML Objects:
1476 ---------------------------
1478 All new predefined objects/control-methods are supported by the iASL
1480 and the ACPICA runtime validation/repair (arguments and return values.)
1482 predefined names include the following:
1484 Standard Predefined Names (Objects or Control Methods):
1485 _AEI, _CLS, _CPC, _CWS, _DEP,
1486 _DLM, _EVT, _GCP, _CRT, _GWS,
1487 _HRV, _PRE, _PSE, _SRT, _SUB.
1489 Resource Tags (Names used to access individual fields within resource
1491 _DBT, _DPL, _DRS, _END, _FLC,
1492 _IOR, _LIN, _MOD, _PAR, _PHA,
1493 _PIN, _PPI, _POL, _RXL, _SLV,
1494 _SPE, _STB, _TXL, _VEN.
1496 ACPICA External Interfaces:
1497 ---------------------------
1499 Several new interfaces have been defined for use by ACPI-related device
1500 drivers and other host OS services:
1502 AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
1504 acquire and release AML mutexes that are defined in the DSDT/SSDT tables
1505 provided by the BIOS. They are intended to be used in conjunction with the
1506 ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
1507 mutual exclusion with the AML code/interpreter.
1509 AcpiGetEventResources: Returns the (formatted) resource descriptors as
1511 by the ACPI 5.0 _AEI object (ACPI Event Information). This object
1513 resource descriptors associated with hardware-reduced platform events,
1515 to the AcpiGetCurrentResources interface.
1517 Operation Region Handlers: For General Purpose IO and Generic Serial Bus
1518 operation regions, information about the Connection() object and any
1520 length information is passed to the region handler within the Context
1523 AcpiBufferToResource: This interface converts a raw AML buffer containing
1525 resource template or resource descriptor to the ACPI_RESOURCE internal
1527 suitable for use by device drivers. Can be used by an operation region
1529 to convert the Connection() buffer object into a ACPI_RESOURCE.
1531 Miscellaneous/Tools/TestSuites:
1532 -------------------------------
1534 Support for extended _HID names (Four alpha characters instead of three).
1535 Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
1536 Support for ACPI 5.0 features in the ASLTS test suite.
1537 Fully updated documentation (ACPICA and iASL reference documents.)
1539 ACPI Table Definition Language:
1540 -------------------------------
1542 Support for this language was implemented and released as a subsystem of
1544 iASL compiler in 2010. (See the iASL compiler User Guide.)
1547 Non-ACPI 5.0 changes for this release:
1548 --------------------------------------
1550 1) ACPICA Core Subsystem:
1552 Fix a problem with operation region declarations where a failure can occur
1554 the region name and an argument that evaluates to an object (such as the
1555 region address) are in different namespace scopes. Lin Ming, ACPICA BZ
1558 Do not abort an ACPI table load if an invalid space ID is found within.
1560 will be caught later if the offending method is executed. ACPICA BZ 925.
1562 Fixed an issue with the FFixedHW space ID where the ID was not always
1563 recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
1565 Fixed a problem with the 32-bit generation of the unix-specific OSL
1566 (osunixxf.c). Lin Ming, ACPICA BZ 936.
1568 Several changes made to enable generation with the GCC 4.6 compiler.
1572 New error messages: Unsupported I/O requests (not 8/16/32 bit), and
1574 field registers out-of-range.
1576 2) iASL Compiler/Disassembler and Tools:
1578 iASL: Implemented the __PATH__ operator, which returns the full pathname
1580 the current source file.
1582 AcpiHelp: Automatically display expanded keyword information for all ASL
1585 Debugger: Add "Template" command to disassemble/dump resource template
1588 Added a new master script to generate and execute the ASLTS test suite.
1589 Automatically handles 32- and 64-bit generation. See tests/aslts.sh
1591 iASL: Fix problem with listing generation during processing of the
1593 operator where AML listing was disabled until the entire Switch block was
1596 iASL: Improve support for semicolon statement terminators. Fix "invalid
1597 character" message for some cases when the semicolon is used. Semicolons
1599 now allowed after every <Term> grammar element. ACPICA BZ 927.
1601 iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
1604 Disassembler: Fix problem with disassembly of the DataTableRegion operator
1605 where an inadvertent "Unhandled deferred opcode" message could be
1608 3) Example Code and Data Size
1610 These are the sizes for the OS-independent acpica.lib produced by the
1611 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
1612 includes the debug output trace mechanism and has a much larger code and
1617 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
1618 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
1620 Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total
1621 Debug Version: 170.8K Code, 72.6K Data, 243.4K Total
1623 ----------------------------------------
1624 22 September 2011. Summary of changes for version 20110922:
1628 Support for ACPI 5.0 in ACPICA has been underway for several months and
1630 be released at the same time that ACPI 5.0 is officially released.
1632 The ACPI 5.0 specification is on track for release in the next few months.
1634 1) ACPICA Core Subsystem:
1636 Fixed a problem where the maximum sleep time for the Sleep() operator was
1637 intended to be limited to two seconds, but was inadvertently limited to 20
1640 Linux and Unix makefiles: Added header file dependencies to ensure correct
1641 generation of ACPICA core code and utilities. Also simplified the
1643 considerably through the use of the vpath variable to specify search
1647 2) iASL Compiler/Disassembler and Tools:
1649 iASL: Implemented support to check the access length for all fields
1651 access named Resource Descriptor fields. For example, if a resource field
1653 defined to be two bits, a warning is issued if a CreateXxxxField() is used
1654 with an incorrect bit length. This is implemented for all current resource
1655 descriptor names. ACPICA BZ 930.
1657 Disassembler: Fixed a byte ordering problem with the output of 24-bit and
1661 iASL: Fixed a couple of issues associated with variable-length package
1662 objects. 1) properly handle constants like One, Ones, Zero -- do not make
1664 VAR_PACKAGE when these are used as a package length. 2) Allow the
1666 opcode (in addition to PACKAGE) when validating object types for
1670 iASL: Emit statistics for all output files (instead of just the ASL input
1672 AML output). Includes listings, hex files, etc.
1674 iASL: Added -G option to the table compiler to allow the compilation of
1676 ACPI tables. The only part of a table that is required is the standard 36-
1680 AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
1682 which also adds correct 64-bit support. Also, now all output filenames are
1683 completely lower case.
1685 AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
1686 loading table files. A warning is issued for any such tables. The only
1687 exception is an FADT. This also fixes a possible fault when attempting to
1689 non-AML tables. ACPICA BZ 932.
1691 AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where a
1692 missing table terminator could cause a fault when using the -p option.
1694 AcpiSrc: Fixed a possible divide-by-zero fault when generating file
1697 3) Example Code and Data Size
1699 These are the sizes for the OS-independent acpica.lib produced by the
1700 Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
1701 includes the debug output trace mechanism and has a much larger code and
1705 Previous Release (VC 9.0):
1706 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
1707 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
1708 Current Release (VC 9.0):
1709 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
1710 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
1713 ----------------------------------------
1714 23 June 2011. Summary of changes for version 20110623:
1716 1) ACPI CA Core Subsystem:
1718 Updated the predefined name repair mechanism to not attempt repair of a
1720 return object if a _PSS object is present. We can only sort the _TSS
1722 package if there is no _PSS within the same scope. This is because if _PSS
1724 present, the ACPI specification dictates that the _TSS Power Dissipation
1726 is to be ignored, and therefore some BIOSs leave garbage values in the
1728 Power field(s). In this case, it is best to just return the _TSS package
1730 is. Reported by, and fixed with assistance from Fenghua Yu.
1732 Added an option to globally disable the control method return value
1734 and repair. This runtime option can be used to disable return value repair
1736 this is causing a problem on a particular machine. Also added an option to
1737 AcpiExec (-dr) to set this disable flag.
1739 All makefiles and project files: Major changes to improve generation of
1741 tools. ACPICA BZ 912:
1742 Reduce default optimization levels to improve compatibility
1743 For Linux, add strict-aliasing=0 for gcc 4
1744 Cleanup and simplify use of command line defines
1745 Cleanup multithread library support
1746 Improve usage messages
1748 Linux-specific header: update handling of THREAD_ID and pthread. For the
1750 bit case, improve casting to eliminate possible warnings, especially with
1754 Example Code and Data Size: These are the sizes for the OS-independent
1755 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1757 version of the code includes the debug output trace mechanism and has a
1759 larger code and data size.
1761 Previous Release (VC 9.0):
1762 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
1763 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
1764 Current Release (VC 9.0):
1765 Non-Debug Version: 90.2K Code, 23.9K Data, 114.1K Total
1766 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
1768 2) iASL Compiler/Disassembler and Tools:
1770 With this release, a new utility named "acpihelp" has been added to the
1772 package. This utility summarizes the ACPI specification chapters for the
1774 and AML languages. It generates under Linux/Unix as well as Windows, and
1775 provides the following functionality:
1776 Find/display ASL operator(s) -- with description and syntax.
1777 Find/display ASL keyword(s) -- with exact spelling and descriptions.
1778 Find/display ACPI predefined name(s) -- with description, number
1779 of arguments, and the return value data type.
1780 Find/display AML opcode name(s) -- with opcode, arguments, and
1782 Decode/display AML opcode -- with opcode name, arguments, and grammar.
1784 Service Layers: Make multi-thread support configurable. Conditionally
1786 the multi-thread support so that threading libraries will not be linked if
1788 necessary. The only tool that requires multi-thread support is AcpiExec.
1790 iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
1792 Bison appear to want the interface to yyerror to be a const char * (or at
1793 least this is a problem when generating iASL on some systems.) ACPICA BZ
1797 Tools: Fix for systems where O_BINARY is not defined. Only used for
1799 versions of the tools.
1801 ----------------------------------------
1802 27 May 2011. Summary of changes for version 20110527:
1804 1) ACPI CA Core Subsystem:
1806 ASL Load() operator: Reinstate most restrictions on the incoming ACPI
1808 signature. Now, only allow SSDT, OEMx, and a null signature. History:
1809 1) Originally, we checked the table signature for "SSDT" or "PSDT".
1810 (PSDT is now obsolete.)
1811 2) We added support for OEMx tables, signature "OEM" plus a fourth
1812 "don't care" character.
1813 3) Valid tables were encountered with a null signature, so we just
1814 gave up on validating the signature, (05/2008).
1815 4) We encountered non-AML tables such as the MADT, which caused
1816 interpreter errors and kernel faults. So now, we once again allow
1817 only SSDT, OEMx, and now, also a null signature. (05/2011).
1819 Added the missing _TDL predefined name to the global name list in order to
1820 enable validation. Affects both the core ACPICA code and the iASL
1823 Example Code and Data Size: These are the sizes for the OS-independent
1824 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1826 version of the code includes the debug output trace mechanism and has a
1828 larger code and data size.
1830 Previous Release (VC 9.0):
1831 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
1832 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
1833 Current Release (VC 9.0):
1834 Non-Debug Version: 90.1K Code, 23.9K Data, 114.0K Total
1835 Debug Version: 165.6K Code, 68.4K Data, 234.0K Total
1837 2) iASL Compiler/Disassembler and Tools:
1839 Debugger/AcpiExec: Implemented support for "complex" method arguments on
1841 debugger command line. This adds support beyond simple integers --
1843 Strings, Buffers, and Packages. Includes support for nested packages.
1844 Increased the default command line buffer size to accommodate these
1846 See the ACPICA reference for details and syntax. ACPICA BZ 917.
1848 Debugger/AcpiExec: Implemented support for "default" method arguments for
1850 Execute/Debug command. Now, the debugger will always invoke a control
1852 with the required number of arguments -- even if the command line
1854 none or insufficient arguments. It uses default integer values for any
1856 arguments. Also fixes a bug where only six method arguments maximum were
1857 supported instead of the required seven.
1859 Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
1861 also return status in order to prevent buffer overruns. See the ACPICA
1862 reference for details and syntax. ACPICA BZ 921
1864 iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
1865 makefiles to simplify support for the two different but similar parser
1866 generators, bison and yacc.
1868 Updated the generic unix makefile for gcc 4. The default gcc version is
1870 expected to be 4 or greater, since options specific to gcc 4 are used.
1872 ----------------------------------------
1873 13 April 2011. Summary of changes for version 20110413:
1875 1) ACPI CA Core Subsystem:
1877 Implemented support to execute a so-called "orphan" _REG method under the
1879 device. This change will force the execution of a _REG method underneath
1882 device even if there is no corresponding operation region of type
1883 EmbeddedControl. Fixes a problem seen on some machines and apparently is
1884 compatible with Windows behavior. ACPICA BZ 875.
1886 Added more predefined methods that are eligible for automatic NULL package
1887 element removal. This change adds another group of predefined names to the
1889 of names that can be repaired by having NULL package elements dynamically
1890 removed. This group are those methods that return a single variable-length
1891 package containing simple data types such as integers, buffers, strings.
1893 includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
1896 and _TZD. ACPICA BZ 914.
1898 Split and segregated all internal global lock functions to a new file,
1901 Updated internal address SpaceID for DataTable regions. Moved this
1904 id in preparation for ACPI 5.0 changes that will include some new space
1907 change should not affect user/host code.
1909 Example Code and Data Size: These are the sizes for the OS-independent
1911 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
1913 the code includes the debug output trace mechanism and has a much larger
1918 Previous Release (VC 9.0):
1919 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
1920 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
1921 Current Release (VC 9.0):
1922 Non-Debug Version: 90.0K Code, 23.8K Data, 113.8K Total
1923 Debug Version: 164.5K Code, 68.0K Data, 232.5K Total
1925 2) iASL Compiler/Disassembler and Tools:
1927 iASL/DTC: Major update for new grammar features. Allow generic data types
1929 custom ACPI tables. Field names are now optional. Any line can be split to
1930 multiple lines using the continuation char (\). Large buffers now use
1932 continuation character(s) and no colon on the continuation lines. See the
1934 update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
1937 iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
1939 Since the parser stuffs a "zero" as the return value for these statements
1942 the underlying AML grammar), they were seen as "return with value" by the
1944 semantic checking. They are now seen correctly as "null" return
1947 iASL: Check if a_REG declaration has a corresponding Operation Region.
1949 check for each _REG to ensure that there is in fact a corresponding
1951 region declaration in the same scope. If not, the _REG method is not very
1953 since it probably won't be executed. ACPICA BZ 915.
1955 iASL/DTC: Finish support for expression evaluation. Added a new expression
1957 that implements c-style operator precedence and parenthesization. ACPICA
1961 Disassembler/DTC: Remove support for () and <> style comments in data
1964 that DTC has full expression support, we don't want to have comment
1967 start with a parentheses or a less-than symbol. Now, only the standard /*
1970 comments are supported, as well as the bracket [] comments.
1972 AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
1974 headers in the acpidump file. Update the header validation to support
1976 tables. Problem introduced in previous AcpiXtract version in the change to
1977 support "wrong checksum" error messages emitted by acpidump utility.
1979 iASL: Add a * option to generate all template files (as a synonym for ALL)
1982 "iasl -T *" or "iasl -T ALL".
1984 iASL/DTC: Do not abort compiler on fatal errors. We do not want to
1986 abort the compiler on "fatal" errors, simply should abort the current
1988 This allows multiple compiles with a single (possibly wildcard) compiler
1991 ----------------------------------------
1992 16 March 2011. Summary of changes for version 20110316:
1994 1) ACPI CA Core Subsystem:
1996 Fixed a problem caused by a _PRW method appearing at the namespace root
1998 during the setup of wake GPEs. A fault could occur if a _PRW directly
2001 root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
2003 Implemented support for "spurious" Global Lock interrupts. On some
2005 global lock interrupt can occur without the pending flag being set. Upon a
2007 interrupt, we now ensure that a thread is actually waiting for the lock
2009 signaling GL availability. Rafael Wysocki, Bob Moore.
2011 Example Code and Data Size: These are the sizes for the OS-independent
2013 produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
2015 the code includes the debug output trace mechanism and has a much larger
2020 Previous Release (VC 9.0):
2021 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
2022 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
2023 Current Release (VC 9.0):
2024 Non-Debug Version: 89.8K Code, 23.8K Data, 113.6K Total
2025 Debug Version: 164.2K Code, 67.9K Data, 232.1K Total
2027 2) iASL Compiler/Disassembler and Tools:
2029 Implemented full support for the "SLIC" ACPI table. Includes support in
2031 header files, disassembler, table compiler, and template generator. Bob
2035 AcpiXtract: Correctly handle embedded comments and messages from AcpiDump.
2036 Apparently some or all versions of acpidump will occasionally emit a
2039 "Wrong checksum", etc., into the dump file. This was causing problems for
2040 AcpiXtract. ACPICA BZ 905.
2042 iASL: Fix the Linux makefile by removing an inadvertent double file
2046 AcpiExec: Update installation of operation region handlers. Install one
2048 for a user-defined address space. This is used by the ASL test suite
2051 ----------------------------------------
2052 11 February 2011. Summary of changes for version 20110211:
2054 1) ACPI CA Core Subsystem:
2056 Added a mechanism to defer _REG methods for some early-installed handlers.
2057 Most user handlers should be installed before call to AcpiEnableSubsystem.
2058 However, Event handlers and region handlers should be installed after
2059 AcpiInitializeObjects. Override handlers for the "default" regions should
2061 installed early, however. This change executes all _REG methods for the
2062 default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
2063 chicken/egg issues between them. ACPICA BZ 848.
2065 Implemented an optimization for GPE detection. This optimization will
2067 ignore GPE registers that contain no enabled GPEs -- there is no need to
2068 read the register since this information is available internally. This
2069 becomes more important on machines with a large GPE space. ACPICA bugzilla
2070 884. Lin Ming. Suggestion from Joe Liu.
2072 Removed all use of the highly unreliable FADT revision field. The revision
2073 number in the FADT has been found to be completely unreliable and cannot
2075 trusted. Only the actual table length can be used to infer the version.
2077 change updates the ACPICA core and the disassembler so that both no longer
2078 even look at the FADT version and instead depend solely upon the FADT
2081 Fix an unresolved name issue for the no-debug and no-error-message source
2082 generation cases. The _AcpiModuleName was left undefined in these cases,
2084 it is actually needed as a parameter to some interfaces. Define
2085 _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
2087 Split several large files (makefiles and project files updated)
2088 utglobal.c -> utdecode.c
2089 dbcomds.c -> dbmethod.c dbnames.c
2090 dsopcode.c -> dsargs.c dscontrol.c
2091 dsload.c -> dsload2.c
2092 aslanalyze.c -> aslbtypes.c aslwalks.c
2094 Example Code and Data Size: These are the sizes for the OS-independent
2095 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2096 debug version of the code includes the debug output trace mechanism and
2098 a much larger code and data size.
2100 Previous Release (VC 9.0):
2101 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
2102 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
2103 Current Release (VC 9.0):
2104 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
2105 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
2107 2) iASL Compiler/Disassembler and Tools:
2109 iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
2110 These are useful C-style macros with the standard definitions. ACPICA
2113 iASL/DTC: Added support for integer expressions and labels. Support for
2115 expressions for all integer fields in all ACPI tables. Support for labels
2117 "generic" portions of tables such as UEFI. See the iASL reference manual.
2119 Debugger: Added a command to display the status of global handlers. The
2120 "handlers" command will display op region, fixed event, and miscellaneous
2121 global handlers. installation status -- and for op regions, whether
2123 or user-installed handler will be used.
2125 iASL: Warn if reserved method incorrectly returns a value. Many predefined
2126 names are defined such that they do not return a value. If implemented as
2128 method, issue a warning if such a name explicitly returns a value. ACPICA
2131 iASL: Added detection of GPE method name conflicts. Detects a conflict
2133 there are two GPE methods of the form _Lxy and _Exy in the same scope.
2135 example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
2137 iASL/DTC: Fixed a couple input scanner issues with comments and line
2138 numbers. Comment remover could get confused and miss a comment ending.
2140 a problem with line counter maintenance.
2142 iASL/DTC: Reduced the severity of some errors from fatal to error. There
2144 no need to abort on simple errors within a field definition.
2146 Debugger: Simplified the output of the help command. All help output now
2148 a single screen, instead of help subcommands. ACPICA Bugzilla 897.
2150 ----------------------------------------
2151 12 January 2011. Summary of changes for version 20110112:
2153 1) ACPI CA Core Subsystem:
2155 Fixed a race condition between method execution and namespace walks that
2157 possibly cause a fault. The problem was apparently introduced in version
2158 20100528 as a result of a performance optimization that reduces the number
2160 namespace walks upon method exit by using the delete_namespace_subtree
2161 function instead of the delete_namespace_by_owner function used
2163 Bug is a missing namespace lock in the delete_namespace_subtree function.
2164 dana.myers@oracle.com
2166 Fixed several issues and a possible fault with the automatic "serialized"
2167 method support. History: This support changes a method to "serialized" on
2169 fly if the method generates an AE_ALREADY_EXISTS error, indicating the
2170 possibility that it cannot handle reentrancy. This fix repairs a couple of
2171 issues seen in the field, especially on machines with many cores:
2173 1) Delete method children only upon the exit of the last thread,
2174 so as to not delete objects out from under other running threads
2175 (and possibly causing a fault.)
2176 2) Set the "serialized" bit for the method only upon the exit of the
2177 Last thread, so as to not cause deadlock when running threads
2179 3) Cleanup the use of the AML "MethodFlags" and internal method flags
2180 so that there is no longer any confusion between the two.
2182 Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
2184 Debugger: Now lock the namespace for duration of a namespace dump.
2186 issues if the namespace is changing dynamically underneath the debugger.
2187 Especially affects temporary namespace nodes, since the debugger displays
2190 Updated the ordering of include files. The ACPICA headers should appear
2191 before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
2193 any necessary compiler-specific defines, etc. Affects the ACPI-related
2197 Updated all ACPICA copyrights and signons to 2011. Added the 2011
2199 to all module headers and signons, including the Linux header. This
2201 virtually every file in the ACPICA core subsystem, iASL compiler, and all
2204 Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
2205 project files for VC++ 6.0 are now obsolete. New project files can be
2207 under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
2210 Example Code and Data Size: These are the sizes for the OS-independent
2211 acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2212 debug version of the code includes the debug output trace mechanism and
2214 much larger code and data size.
2216 Previous Release (VC 6.0):
2217 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
2218 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
2219 Current Release (VC 9.0):
2220 Non-Debug Version: 89.7K Code, 23.7K Data, 113.4K Total
2221 Debug Version: 163.9K Code, 67.5K Data, 231.4K Total
2223 2) iASL Compiler/Disassembler and Tools:
2225 iASL: Added generic data types to the Data Table compiler. Add "generic"
2227 types such as UINT32, String, Unicode, etc., to simplify the generation of
2228 platform-defined tables such as UEFI. Lin Ming.
2230 iASL: Added listing support for the Data Table Compiler. Adds listing
2232 (-l) to display actual binary output for each line of input code.
2234 ----------------------------------------
2235 09 December 2010. Summary of changes for version 20101209:
2237 1) ACPI CA Core Subsystem:
2239 Completed the major overhaul of the GPE support code that was begun in
2241 2010. Major features include: removal of _PRW execution in ACPICA (host
2242 executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
2243 changes to existing interfaces, simplification of GPE handler operation,
2245 a handful of new interfaces:
2251 One new file, evxfgpe.c to consolidate all external GPE interfaces.
2253 See the ACPICA Programmer Reference for full details and programming
2254 information. See the new section 4.4 "General Purpose Event (GPE) Support"
2255 for a full overview, and section 8.7 "ACPI General Purpose Event
2257 for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin Ming,
2258 Bob Moore, Rafael Wysocki.
2260 Implemented a new GPE feature for Windows compatibility, the "Implicit
2262 GPE Notify". This feature will automatically issue a Notify(2) on a device
2263 when a Wake GPE is received if there is no corresponding GPE method or
2264 handler. ACPICA BZ 870.
2266 Fixed a problem with the Scope() operator during table parse and load
2268 During load phase (table load or method execution), the scope operator
2270 not enter the target into the namespace. Instead, it should open a new
2272 at the target location. Linux BZ 19462, ACPICA BZ 882.
2274 Example Code and Data Size: These are the sizes for the OS-independent
2275 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2276 debug version of the code includes the debug output trace mechanism and
2278 much larger code and data size.
2281 Non-Debug Version: 89.8K Code, 18.9K Data, 108.7K Total
2282 Debug Version: 166.6K Code, 52.1K Data, 218.7K Total
2284 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
2285 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
2287 2) iASL Compiler/Disassembler and Tools:
2289 iASL: Relax the alphanumeric restriction on _CID strings. These strings
2291 "bus-specific" per the ACPI specification, and therefore any characters
2293 acceptable. The only checks that can be performed are for a null string
2295 perhaps for a leading asterisk. ACPICA BZ 886.
2297 iASL: Fixed a problem where a syntax error that caused a premature EOF
2298 condition on the source file emitted a very confusing error message. The
2299 premature EOF is now detected correctly. ACPICA BZ 891.
2301 Disassembler: Decode the AccessSize within a Generic Address Structure
2303 access, word access, etc.) Note, this field does not allow arbitrary bit
2304 access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
2306 New: AcpiNames utility - Example namespace dump utility. Shows an example
2308 ACPICA configuration for a minimal namespace dump utility. Uses table and
2309 namespace managers, but no AML interpreter. Does not add any functionality
2310 over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
2311 partition and configure ACPICA. ACPICA BZ 883.
2313 AML Debugger: Increased the debugger buffer size for method return
2315 Was 4K, increased to 16K. Also enhanced error messages for debugger method
2316 execution, including the buffer overflow case.
2318 ----------------------------------------
2319 13 October 2010. Summary of changes for version 20101013:
2321 1) ACPI CA Core Subsystem:
2323 Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
2325 clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
2326 HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
2328 Changed the type of the predefined namespace object _TZ from ThermalZone
2330 Device. This was found to be confusing to the host software that processes
2331 the various thermal zones, since _TZ is not really a ThermalZone. However,
2333 Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
2336 Added Windows Vista SP2 to the list of supported _OSI strings. The actual
2337 string is "Windows 2006 SP2".
2339 Eliminated duplicate code in AcpiUtExecute* functions. Now that the
2341 code automatically repairs _HID-related strings, this type of code is no
2342 longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ 878.
2344 Example Code and Data Size: These are the sizes for the OS-independent
2345 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2346 debug version of the code includes the debug output trace mechanism and
2348 much larger code and data size.
2351 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
2352 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
2354 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
2355 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
2357 2) iASL Compiler/Disassembler and Tools:
2359 iASL: Implemented additional compile-time validation for _HID strings. The
2360 non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the length
2362 the string must be exactly seven or eight characters. For both _HID and
2364 strings, all characters must be alphanumeric. ACPICA BZ 874.
2366 iASL: Allow certain "null" resource descriptors. Some BIOS code creates
2367 descriptors that are mostly or all zeros, with the expectation that they
2369 be filled in at runtime. iASL now allows this as long as there is a
2371 tag" (name) associated with the descriptor, which gives the ASL a handle
2372 needed to modify the descriptor. ACPICA BZ 873.
2374 Added single-thread support to the generic Unix application OSL. Primarily
2375 for iASL support, this change removes the use of semaphores in the single-
2376 threaded ACPICA tools/applications - increasing performance. The
2377 _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
2378 option. ACPICA BZ 879.
2380 AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
2382 for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
2384 iASL: Moved all compiler messages to a new file, aslmessages.h.
2386 ----------------------------------------
2387 15 September 2010. Summary of changes for version 20100915:
2389 1) ACPI CA Core Subsystem:
2391 Removed the AcpiOsDerivePciId OSL interface. The various host
2393 of this function were not OS-dependent and are now obsolete and can be
2394 removed from all host OSLs. This function has been replaced by
2395 AcpiHwDerivePciId, which is now part of the ACPICA core code.
2396 AcpiHwDerivePciId has been implemented without recursion. Adds one new
2397 module, hwpci.c. ACPICA BZ 857.
2399 Implemented a dynamic repair for _HID and _CID strings. The following
2400 problems are now repaired at runtime: 1) Remove a leading asterisk in the
2401 string, and 2) the entire string is uppercased. Both repairs are in
2402 accordance with the ACPI specification and will simplify host driver code.
2405 The ACPI_THREAD_ID type is no longer configurable, internally it is now
2406 always UINT64. This simplifies the ACPICA code, especially any printf
2408 UINT64 is the only common data type for all thread_id types across all
2409 operating systems. It is now up to the host OSL to cast the native
2411 type to UINT64 before returning the value to ACPICA (via
2413 Lin Ming, Bob Moore.
2415 Added the ACPI_INLINE type to enhance the ACPICA configuration. The
2417 keyword is not standard across compilers, and this type allows inline to
2419 configured on a per-compiler basis. Lin Ming.
2421 Made the system global AcpiGbl_SystemAwakeAndRunning publically available.
2422 Added an extern for this boolean in acpixf.h. Some hosts utilize this
2424 during suspend/restore operations. ACPICA BZ 869.
2426 All code that implements error/warning messages with the "ACPI:" prefix
2428 been moved to a new module, utxferror.c.
2430 The UINT64_OVERLAY was moved to utmath.c, which is the only module where
2432 is used. ACPICA BZ 829. Lin Ming, Bob Moore.
2434 Example Code and Data Size: These are the sizes for the OS-independent
2435 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2436 debug version of the code includes the debug output trace mechanism and
2438 much larger code and data size.
2441 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
2442 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
2444 Non-Debug Version: 89.9K Code, 19.0K Data, 108.9K Total
2445 Debug Version: 166.3K Code, 52.1K Data, 218.4K Total
2447 2) iASL Compiler/Disassembler and Tools:
2449 iASL/Disassembler: Write ACPI errors to stderr instead of the output file.
2450 This keeps the output files free of random error messages that may
2452 from within the namespace/interpreter code. Used this opportunity to merge
2453 all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
2454 866. Lin Ming, Bob Moore.
2456 Tools: update some printfs for ansi warnings on size_t. Handle width
2458 of size_t on 32-bit versus 64-bit generations. Lin Ming.
2460 ----------------------------------------
2461 06 August 2010. Summary of changes for version 20100806:
2463 1) ACPI CA Core Subsystem:
2465 Designed and implemented a new host interface to the _OSI support code.
2467 will allow the host to dynamically add or remove multiple _OSI strings, as
2468 well as install an optional handler that is called for each _OSI
2470 Also added a new AML debugger command, 'osi' to display and modify the
2472 _OSI string table, and test support in the AcpiExec utility. See the
2474 reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
2476 AcpiInstallInterface - Add an _OSI string.
2477 AcpiRemoveInterface - Delete an _OSI string.
2478 AcpiInstallInterfaceHandler - Install optional _OSI handler.
2480 AcpiOsValidateInterface - no longer used.
2482 source/components/utilities/utosi.c
2484 Re-introduced the support to enable multi-byte transfers for Embedded
2485 Controller (EC) operation regions. A reported problem was found to be a
2487 in the host OS, not in the multi-byte support. Previously, the maximum
2489 size passed to the EC operation region handler was a single byte. There
2491 often EC Fields larger than one byte that need to be transferred, and it
2493 useful for the EC driver to lock these as a single transaction. This
2495 enables single transfers larger than 8 bits. This effectively changes the
2496 access to the EC space from ByteAcc to AnyAcc, and will probably require
2497 changes to the host OS Embedded Controller driver to enable 16/32/64/256-
2499 transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
2501 Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
2502 prototype in acpiosxf.h had the output value pointer as a (void *).
2503 It should be a (UINT64 *). This may affect some host OSL code.
2505 Fixed a couple problems with the recently modified Linux makefiles for
2507 and AcpiExec. These new makefiles place the generated object files in the
2508 local directory so that there can be no collisions between the files that
2510 shared between them that are compiled with different options.
2512 Example Code and Data Size: These are the sizes for the OS-independent
2513 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2514 debug version of the code includes the debug output trace mechanism and
2516 much larger code and data size.
2519 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
2520 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
2522 Non-Debug Version: 89.1K Code, 19.0K Data, 108.1K Total
2523 Debug Version: 165.1K Code, 51.9K Data, 217.0K Total
2525 2) iASL Compiler/Disassembler and Tools:
2527 iASL/Disassembler: Added a new option (-da, "disassemble all") to load the
2528 namespace from and disassemble an entire group of AML files. Useful for
2529 loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
2531 disassembling with one simple command. ACPICA BZ 865. Lin Ming.
2533 iASL: Allow multiple invocations of -e option. This change allows multiple
2534 uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
2538 ----------------------------------------
2539 02 July 2010. Summary of changes for version 20100702:
2541 1) ACPI CA Core Subsystem:
2543 Implemented several updates to the recently added GPE reference count
2544 support. The model for "wake" GPEs is changing to give the host OS
2546 control of these GPEs. Eventually, the ACPICA core will not execute any
2548 methods, since the host already must execute them. Also, additional
2550 were made to help ensure that the reference counts are kept in proper
2551 synchronization with reality. Rafael J. Wysocki.
2553 1) Ensure that GPEs are not enabled twice during initialization.
2554 2) Ensure that GPE enable masks stay in sync with the reference count.
2555 3) Do not inadvertently enable GPEs when writing GPE registers.
2556 4) Remove the internal wake reference counter and add new AcpiGpeWakeup
2557 interface. This interface will set or clear individual GPEs for wakeup.
2558 5) Remove GpeType argument from AcpiEnable and AcpiDisable. These
2560 are now used for "runtime" GPEs only.
2562 Changed the behavior of the GPE install/remove handler interfaces. The GPE
2564 no longer disabled during this process, as it was found to cause problems
2566 some machines. Rafael J. Wysocki.
2568 Reverted a change introduced in version 20100528 to enable Embedded
2569 Controller multi-byte transfers. This change was found to cause problems
2571 Index Fields and possibly Bank Fields. It will be reintroduced when these
2572 problems have been resolved.
2574 Fixed a problem with references to Alias objects within Package Objects. A
2575 reference to an Alias within the definition of a Package was not always
2576 resolved properly. Aliases to objects like Processors, Thermal zones, etc.
2577 were resolved to the actual object instead of a reference to the object as
2579 should be. Package objects are only allowed to contain integer, string,
2580 buffer, package, and reference objects. Redhat bugzilla 608648.
2582 Example Code and Data Size: These are the sizes for the OS-independent
2583 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2584 debug version of the code includes the debug output trace mechanism and
2586 much larger code and data size.
2589 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
2590 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
2592 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
2593 Debug Version: 164.0K Code, 51.5K Data, 215.5K Total
2595 2) iASL Compiler/Disassembler and Tools:
2597 iASL: Implemented a new compiler subsystem to allow definition and
2598 compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
2600 are called "ACPI Data Tables", and the new compiler is the "Data Table
2601 Compiler". This compiler is intended to simplify the existing error-prone
2602 process of creating these tables for the BIOS, as well as allowing the
2603 disassembly, modification, recompilation, and override of existing ACPI
2605 tables. See the iASL User Guide for detailed information.
2607 iASL: Implemented a new Template Generator option in support of the new
2609 Table Compiler. This option will create examples of all known ACPI tables
2610 that can be used as the basis for table development. See the iASL
2611 documentation and the -T option.
2613 Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
2616 Updated the Linux makefiles for iASL and AcpiExec to place the generated
2617 object files in the local directory so that there can be no collisions
2618 between the shared files between them that are generated with different
2621 Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec. Use
2622 the #define __APPLE__ to enable this support.
2624 ----------------------------------------
2625 28 May 2010. Summary of changes for version 20100528:
2627 Note: The ACPI 4.0a specification was released on April 5, 2010 and is
2628 available at www.acpi.info. This is primarily an errata release.
2630 1) ACPI CA Core Subsystem:
2632 Undefined ACPI tables: We are looking for the definitions for the
2634 ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
2636 Implemented support to enable multi-byte transfers for Embedded Controller
2637 (EC) operation regions. Previously, the maximum data size passed to the EC
2638 operation region handler was a single byte. There are often EC Fields
2640 than one byte that need to be transferred, and it is useful for the EC
2642 to lock these as a single transaction. This change enables single
2644 larger than 8 bits. This effectively changes the access to the EC space
2646 ByteAcc to AnyAcc, and will probably require changes to the host OS
2648 Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
2650 transfers. Alexey Starikovskiy, Lin Ming
2652 Implemented a performance enhancement for namespace search and access.
2654 change enhances the performance of namespace searches and walks by adding
2656 backpointer to the parent in each namespace node. On large namespaces,
2658 change can improve overall ACPI performance by up to 9X. Adding a pointer
2660 each namespace node increases the overall size of the internal namespace
2662 about 5%, since each namespace entry usually consists of both a namespace
2663 node and an ACPI operand object. However, this is the first growth of the
2664 namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
2666 Implemented a performance optimization that reduces the number of
2668 walks. On control method exit, only walk the namespace if the method is
2670 to have created namespace objects outside of its local scope. Previously,
2672 entire namespace was traversed on each control method exit. This change
2674 improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
2677 Added support to truncate I/O addresses to 16 bits for Windows
2679 Some ASL code has been seen in the field that inadvertently has bits set
2680 above bit 15. This feature is optional and is enabled if the BIOS requests
2681 any Windows OSI strings. It can also be enabled by the host OS. Matthew
2684 Added support to limit the maximum time for the ASL Sleep() operator. To
2685 prevent accidental deep sleeps, limit the maximum time that Sleep() will
2686 actually sleep. Configurable, the default maximum is two seconds. ACPICA
2689 Added run-time validation support for the _WDG and_WED Microsoft
2691 methods. These objects are defined by "Windows Instrumentation", and are
2693 part of the ACPI spec. ACPICA BZ 860.
2695 Expanded all statistic counters used during namespace and device
2696 initialization from 16 to 32 bits in order to support very large
2699 Replaced all instances of %d in printf format specifiers with %u since
2701 all integers in ACPICA are unsigned.
2703 Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
2707 Example Code and Data Size: These are the sizes for the OS-independent
2708 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2709 debug version of the code includes the debug output trace mechanism and
2711 much larger code and data size.
2714 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
2715 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
2717 Non-Debug Version: 88.3K Code, 18.8K Data, 107.1K Total
2718 Debug Version: 164.1K Code, 51.5K Data, 215.6K Total
2720 2) iASL Compiler/Disassembler and Tools:
2722 iASL: Added compiler support for the _WDG and_WED Microsoft predefined
2723 methods. These objects are defined by "Windows Instrumentation", and are
2725 part of the ACPI spec. ACPICA BZ 860.
2727 AcpiExec: added option to disable the memory tracking mechanism. The -dt
2728 option will disable the tracking mechanism, which improves performance
2731 AcpiExec: Restructured the command line options into -d (disable) and -e
2734 ----------------------------------------
2735 28 April 2010. Summary of changes for version 20100428:
2737 1) ACPI CA Core Subsystem:
2739 Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
2740 including FADT-based and GPE Block Devices, execute any _PRW methods in
2742 new table, and process any _Lxx/_Exx GPE methods in the new table. Any
2743 runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
2744 immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
2745 Devices. Provides compatibility with other ACPI implementations. Two new
2746 files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
2749 Fixed a regression introduced in version 20100331 within the table manager
2750 where initial table loading could fail. This was introduced in the fix for
2751 AcpiReallocateRootTable. Also, renamed some of fields in the table manager
2752 data structures to clarify their meaning and use.
2754 Fixed a possible allocation overrun during internal object copy in
2755 AcpiUtCopySimpleObject. The original code did not correctly handle the
2757 where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
2760 Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
2761 possible access beyond end-of-allocation. Also, now fully validate
2763 (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
2765 Example Code and Data Size: These are the sizes for the OS-independent
2766 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2767 debug version of the code includes the debug output trace mechanism and
2769 much larger code and data size.
2772 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
2773 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
2775 Non-Debug Version: 88.4K Code, 18.8K Data, 107.2K Total
2776 Debug Version: 164.2K Code, 51.5K Data, 215.7K Total
2778 2) iASL Compiler/Disassembler and Tools:
2780 iASL: Implemented Min/Max/Len/Gran validation for address resource
2781 descriptors. This change implements validation for the address fields that
2782 are common to all address-type resource descriptors. These checks are
2783 implemented: Checks for valid Min/Max, length within the Min/Max window,
2784 valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as per
2785 table 6-40 in the ACPI 4.0a specification. Also split the large
2787 and aslrestype2.c files into five new files. ACPICA BZ 840.
2789 iASL: Added support for the _Wxx predefined names. This support was
2791 and these names were not recognized by the compiler as valid predefined
2792 names. ACPICA BZ 851.
2794 iASL: Added an error for all predefined names that are defined to return
2796 value and thus must be implemented as Control Methods. These include all
2798 the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
2799 names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
2801 iASL: Implemented the -ts option to emit hex AML data in ASL format, as an
2802 ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
2804 dynamically loaded via the Load() operator. Also cleaned up output for the
2806 ta and -tc options. ACPICA BZ 853.
2808 Tests: Added a new file with examples of extended iASL error checking.
2809 Demonstrates the advanced error checking ability of the iASL compiler.
2810 Available at tests/misc/badcode.asl.
2812 ----------------------------------------
2813 31 March 2010. Summary of changes for version 20100331:
2815 1) ACPI CA Core Subsystem:
2817 Completed a major update for the GPE support in order to improve support
2819 shared GPEs and to simplify both host OS and ACPICA code. Added a
2821 count mechanism to support shared GPEs that require multiple device
2823 Several external interfaces have changed. One external interface has been
2824 removed. One new external interface was added. Most of the GPE external
2825 interfaces now use the GPE spinlock instead of the events mutex (and the
2826 Flags parameter for many GPE interfaces has been removed.) See the updated
2827 ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
2829 Wysocki. ACPICA BZ 831.
2832 AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
2838 Implemented write support for DataTable operation regions. These regions
2840 defined via the DataTableRegion() operator. Previously, only read support
2842 implemented. The ACPI specification allows DataTableRegions to be
2846 Implemented a new subsystem option to force a copy of the DSDT to local
2847 memory. Optionally copy the entire DSDT to local memory (instead of simply
2848 mapping it.) There are some (albeit very rare) BIOSs that corrupt or
2850 the original DSDT, creating the need for this option. Default is FALSE, do
2853 Implemented detection of a corrupted or replaced DSDT. This change adds
2854 support to detect a DSDT that has been corrupted and/or replaced from
2856 the OS (by firmware). This is typically catastrophic for the system, but
2858 been seen on some machines. Once this problem has been detected, the DSDT
2859 copy option can be enabled via system configuration. Lin Ming, Bob Moore.
2861 Fixed two problems with AcpiReallocateRootTable during the root table
2863 When copying the root table to the new allocation, the length used was
2864 incorrect. The new size was used instead of the current table size,
2866 too much data was copied. Also, the count of available slots for ACPI
2868 was not set correctly. Alexey Starikovskiy, Bob Moore.
2870 Example Code and Data Size: These are the sizes for the OS-independent
2871 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2872 debug version of the code includes the debug output trace mechanism and
2874 much larger code and data size.
2877 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
2878 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
2880 Non-Debug Version: 87.9K Code, 18.6K Data, 106.5K Total
2881 Debug Version: 163.5K Code, 51.3K Data, 214.8K Total
2883 2) iASL Compiler/Disassembler and Tools:
2885 iASL: Implement limited typechecking for values returned from predefined
2886 control methods. The type of any returned static (unnamed) object is now
2887 validated. For example, Return(1). ACPICA BZ 786.
2889 iASL: Fixed a predefined name object verification regression. Fixes a
2891 introduced in version 20100304. An error is incorrectly generated if a
2892 predefined name is declared as a static named object with a value defined
2893 using the keywords "Zero", "One", or "Ones". Lin Ming.
2895 iASL: Added Windows 7 support for the -g option (get local ACPI tables) by
2896 reducing the requested registry access rights. ACPICA BZ 842.
2898 Disassembler: fixed a possible fault when generating External()
2900 Introduced in commit ae7d6fd: Properly handle externals with parent-prefix
2901 (carat). Fixes a string length allocation calculation. Lin Ming.
2903 ----------------------------------------
2904 04 March 2010. Summary of changes for version 20100304:
2906 1) ACPI CA Core Subsystem:
2908 Fixed a possible problem with the AML Mutex handling function
2909 AcpiExReleaseMutex where the function could fault under the very rare
2910 condition when the interpreter has blocked, the interpreter lock is
2912 the interpreter is then reentered via the same thread, and attempts to
2913 acquire an AML mutex that was previously acquired. FreeBSD report 140979.
2917 Implemented additional configuration support for the AML "Debug Object".
2918 Output from the debug object can now be enabled via a global variable,
2919 AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
2921 This debug output is now available in the release version of ACPICA
2923 of just the debug version. Also, the entire debug output module can now be
2924 configured out of the ACPICA build if desired. One new file added,
2925 executer/exdebug.c. Lin Ming, Bob Moore.
2927 Added header support for the ACPI MCHI table (Management Controller Host
2928 Interface Table). This table was added in ACPI 4.0, but the defining
2930 has only recently become available.
2932 Standardized output of integer values for ACPICA warnings/errors. Always
2934 0x prefix for hex output, always use %u for unsigned integer decimal
2936 Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about 400
2937 invocations.) These invocations were converted from the original
2938 ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
2940 Example Code and Data Size: These are the sizes for the OS-independent
2941 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2942 debug version of the code includes the debug output trace mechanism and
2944 much larger code and data size.
2947 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
2948 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
2950 Non-Debug Version: 87.5K Code, 18.4K Data, 105.9K Total
2951 Debug Version: 163.4K Code, 51.1K Data, 214.5K Total
2953 2) iASL Compiler/Disassembler and Tools:
2955 iASL: Implemented typechecking support for static (non-control method)
2956 predefined named objects that are declared with the Name() operator. For
2957 example, the type of this object is now validated to be of type Integer:
2958 Name(_BBN, 1). This change migrates the compiler to using the core
2960 name table instead of maintaining a local version. Added a new file,
2961 aslpredef.c. ACPICA BZ 832.
2963 Disassembler: Added support for the ACPI 4.0 MCHI table.
2965 ----------------------------------------
2966 21 January 2010. Summary of changes for version 20100121:
2968 1) ACPI CA Core Subsystem:
2970 Added the 2010 copyright to all module headers and signons. This affects
2971 virtually every file in the ACPICA core subsystem, the iASL compiler, the
2972 tools/utilities, and the test suites.
2974 Implemented a change to the AcpiGetDevices interface to eliminate
2976 invocations of the _STA method. In the case where a specific _HID is
2977 requested, do not run _STA until a _HID match is found. This eliminates
2978 potentially dozens of _STA calls during a search for a particular
2980 which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
2982 Implemented an additional repair for predefined method return values.
2984 to repair unexpected NULL elements within returned Package objects. Create
2986 Integer of value zero, a NULL String, or a zero-length Buffer as
2988 ACPICA BZ 818. Lin Ming, Bob Moore.
2990 Removed the obsolete ACPI_INTEGER data type. This type was introduced as
2992 code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
2994 64-bit AML integers). It is now obsolete and this change removes it from
2996 ACPICA code base, replaced by UINT64. The original typedef has been
2998 for now for compatibility with existing device driver code. ACPICA BZ 824.
3000 Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field in
3001 the parse tree object.
3003 Added additional warning options for the gcc-4 generation. Updated the
3005 accordingly. This includes some code restructuring to eliminate
3007 code, elimination of some gotos, elimination of unused return values, some
3008 additional casting, and removal of redundant declarations.
3010 Example Code and Data Size: These are the sizes for the OS-independent
3011 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3012 debug version of the code includes the debug output trace mechanism and
3014 much larger code and data size.
3017 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
3018 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
3020 Non-Debug Version: 87.1K Code, 18.0K Data, 105.1K Total
3021 Debug Version: 163.5K Code, 50.9K Data, 214.4K Total
3023 2) iASL Compiler/Disassembler and Tools:
3025 No functional changes for this release.
3027 ----------------------------------------
3028 14 December 2009. Summary of changes for version 20091214:
3030 1) ACPI CA Core Subsystem:
3032 Enhanced automatic data type conversions for predefined name repairs. This
3033 change expands the automatic repairs/conversions for predefined name
3035 values to make Integers, Strings, and Buffers fully interchangeable. Also,
3037 Buffer can be converted to a Package of Integers if necessary. The
3039 module was completely restructured. Lin Ming, Bob Moore.
3041 Implemented automatic removal of null package elements during predefined
3043 repairs. This change will automatically remove embedded and trailing NULL
3044 package elements from returned package objects that are defined to contain
3046 variable number of sub-packages. The driver is then presented with a
3048 with no null elements to deal with. ACPICA BZ 819.
3050 Implemented a repair for the predefined _FDE and _GTM names. The expected
3051 return value for both names is a Buffer of 5 DWORDs. This repair fixes two
3052 possible problems (both seen in the field), where a package of integers is
3053 returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
3056 Implemented additional module-level code support. This change will
3058 execute module-level code that is not at the root of the namespace (under
3060 Device object, etc.). Now executes the code within the current scope
3062 of the root. ACPICA BZ 762. Lin Ming.
3064 Fixed possible mutex acquisition errors when running _REG methods. Fixes a
3065 problem where mutex errors can occur when running a _REG method that is in
3066 the same scope as a method-defined operation region or an operation region
3067 under a module-level IF block. This type of code is rare, so the problem
3069 not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
3071 Fixed a possible memory leak during module-level code execution. An object
3072 could be leaked for each block of executed module-level code if the
3073 interpreter slack mode is enabled This change deletes any implicitly
3075 object from the module-level code block. Lin Ming.
3077 Removed messages for successful predefined repair(s). The repair mechanism
3078 was considered too wordy. Now, messages are only unconditionally emitted
3080 the return object cannot be repaired. Existing messages for successful
3081 repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
3084 Example Code and Data Size: These are the sizes for the OS-independent
3085 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3086 debug version of the code includes the debug output trace mechanism and
3088 much larger code and data size.
3091 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
3092 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
3094 Non-Debug Version: 87.0K Code, 18.0K Data, 105.0K Total
3095 Debug Version: 163.4K Code, 50.8K Data, 214.2K Total
3097 2) iASL Compiler/Disassembler and Tools:
3099 iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
3101 were no longer automatically removed at the termination of the compile.
3103 acpiexec: Implemented the -f option to specify default region fill value.
3104 This option specifies the value used to initialize buffers that simulate
3105 operation regions. Default value is zero. Useful for debugging problems
3107 depend on a specific initial value for a region or field.
3109 ----------------------------------------
3110 12 November 2009. Summary of changes for version 20091112:
3112 1) ACPI CA Core Subsystem:
3114 Implemented a post-order callback to AcpiWalkNamespace. The existing
3115 interface only has a pre-order callback. This change adds an additional
3116 parameter for a post-order callback which will be more useful for bus
3118 ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
3120 Modified the behavior of the operation region memory mapping cache for
3121 SystemMemory. Ensure that the memory mappings created for operation
3123 do not cross 4K page boundaries. Crossing a page boundary while mapping
3124 regions can cause kernel warnings on some hosts if the pages have
3126 attributes. Such regions are probably BIOS bugs, and this is the
3128 Linux BZ 14445. Lin Ming.
3130 Implemented an automatic repair for predefined methods that must return
3131 sorted lists. This change will repair (by sorting) packages returned by
3133 _PSS, and _TSS. Drivers can now assume that the packages are correctly
3135 and do not contain NULL package elements. Adds one new file,
3136 namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
3138 Fixed a possible fault during predefined name validation if a return
3140 object contains NULL elements. Also adds a warning if a NULL element is
3141 followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
3143 include repair or removal of all such NULL elements where possible.
3145 Implemented additional module-level executable AML code support. This
3147 will execute module-level code that is not at the root of the namespace
3148 (under a Device object, etc.) at table load time. Module-level executable
3150 code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
3152 Implemented a new internal function to create Integer objects. This
3154 simplifies miscellaneous object creation code. ACPICA BZ 823.
3156 Reduced the severity of predefined repair messages, Warning to Info. Since
3157 the object was successfully repaired, a warning is too severe. Reduced to
3159 info message for now. These messages may eventually be changed to debug-
3163 Example Code and Data Size: These are the sizes for the OS-independent
3164 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3165 debug version of the code includes the debug output trace mechanism and
3167 much larger code and data size.
3170 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
3171 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
3173 Non-Debug Version: 86.6K Code, 18.2K Data, 104.8K Total
3174 Debug Version: 162.7K Code, 50.8K Data, 213.5K Total
3176 2) iASL Compiler/Disassembler and Tools:
3178 iASL: Implemented Switch() with While(1) so that Break works correctly.
3180 change correctly implements the Switch operator with a surrounding
3182 so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
3184 iASL: Added a message if a package initializer list is shorter than
3186 length. Adds a new remark for a Package() declaration if an initializer
3188 exists, but is shorter than the declared length of the package. Although
3189 technically legal, this is probably a coding error and it is seen in the
3190 field. ACPICA BZ 815. Lin Ming, Bob Moore.
3192 iASL: Fixed a problem where the compiler could fault after the maximum
3194 of errors was reached (200).
3196 acpixtract: Fixed a possible warning for pointer cast if the compiler
3198 level set very high.
3200 ----------------------------------------
3201 13 October 2009. Summary of changes for version 20091013:
3203 1) ACPI CA Core Subsystem:
3205 Fixed a problem where an Operation Region _REG method could be executed
3207 than once. If a custom address space handler is installed by the host
3209 the "initialize operation regions" phase of the ACPICA initialization, any
3210 _REG methods for that address space could be executed twice. This change
3211 fixes the problem. ACPICA BZ 427. Lin Ming.
3213 Fixed a possible memory leak for the Scope() ASL operator. When the exact
3214 invocation of "Scope(\)" is executed (change scope to root), one internal
3215 operand object was leaked. Lin Ming.
3217 Implemented a run-time repair for the _MAT predefined method. If the _MAT
3218 return value is defined as a Field object in the AML, and the field
3219 size is less than or equal to the default width of an integer (32 or
3221 can incorrectly return an Integer instead of a Buffer. ACPICA now
3222 automatically repairs this problem. ACPICA BZ 810.
3224 Implemented a run-time repair for the _BIF and _BIX predefined methods.
3226 "OEM Information" field is often incorrectly returned as an Integer with
3227 value zero if the field is not supported by the platform. This is due to
3229 ambiguity in the ACPI specification. The field should always be a string.
3230 ACPICA now automatically repairs this problem by returning a NULL string
3231 within the returned Package. ACPICA BZ 807.
3233 Example Code and Data Size: These are the sizes for the OS-independent
3234 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3235 debug version of the code includes the debug output trace mechanism and
3237 much larger code and data size.
3240 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
3241 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
3243 Non-Debug Version: 85.8K Code, 18.0K Data, 103.8K Total
3244 Debug Version: 161.8K Code, 50.6K Data, 212.4K Total
3246 2) iASL Compiler/Disassembler and Tools:
3248 Disassembler: Fixed a problem where references to external symbols that
3249 contained one or more parent-prefixes (carats) were not handled correctly,
3250 possibly causing a fault. ACPICA BZ 806. Lin Ming.
3252 Disassembler: Restructured the code so that all functions that handle
3253 external symbols are in a single module. One new file is added,
3256 AML Debugger: Added a max count argument for the Batch command (which
3257 executes multiple predefined methods within the namespace.)
3259 iASL: Updated the compiler documentation (User Reference.) Available at
3260 http://www.acpica.org/documentation/. ACPICA BZ 750.
3262 AcpiXtract: Updated for Lint and other formatting changes. Close all open
3265 ----------------------------------------
3266 03 September 2009. Summary of changes for version 20090903:
3268 1) ACPI CA Core Subsystem:
3270 For Windows Vista compatibility, added the automatic execution of an _INI
3271 method located at the namespace root (\_INI). This method is executed at
3272 table load time. This support is in addition to the automatic execution of
3273 \_SB._INI. Lin Ming.
3275 Fixed a possible memory leak in the interpreter for AML package objects if
3276 the package initializer list is longer than the defined size of the
3278 This apparently can only happen if the BIOS changes the package size on
3280 fly (seen in a _PSS object), as ASL compilers do not allow this. The
3281 interpreter will truncate the package to the defined size (and issue an
3283 message), but previously could leave the extra objects undeleted if they
3285 pre-created during the argument processing (such is the case if the
3287 consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
3289 Fixed a problem seen when a Buffer or String is stored to itself via ASL.
3290 This has been reported in the field. Previously, ACPICA would zero out the
3291 buffer/string. Now, the operation is treated as a noop. Provides Windows
3292 compatibility. ACPICA BZ 803. Lin Ming.
3294 Removed an extraneous error message for ASL constructs of the form
3295 Store(LocalX,LocalX) when LocalX is uninitialized. These curious
3297 are seen in many BIOSs and are once again treated as NOOPs and no error is
3298 emitted when they are encountered. ACPICA BZ 785.
3300 Fixed an extraneous warning message if a _DSM reserved method returns a
3301 Package object. _DSM can return any type of object, so validation on the
3302 return type cannot be performed. ACPICA BZ 802.
3304 Example Code and Data Size: These are the sizes for the OS-independent
3305 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3306 debug version of the code includes the debug output trace mechanism and
3308 much larger code and data size.
3311 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
3312 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
3314 Non-Debug Version: 85.6K Code, 18.0K Data, 103.6K Total
3315 Debug Version: 161.7K Code, 50.9K Data, 212.6K Total
3317 2) iASL Compiler/Disassembler and Tools:
3319 iASL: Fixed a problem with the use of the Alias operator and Resource
3320 Templates. The correct alias is now constructed and no error is emitted.
3323 iASL: Implemented the -I option to specify additional search directories
3325 include files. Allows multiple additional search paths for include files.
3326 Directories are searched in the order specified on the command line (after
3327 the local directory is searched.) ACPICA BZ 800.
3329 iASL: Fixed a problem where the full pathname for include files was not
3330 emitted for warnings/errors. This caused the IDE support to not work
3331 properly. ACPICA BZ 765.
3333 iASL: Implemented the -@ option to specify a Windows-style response file
3334 containing additional command line options. ACPICA BZ 801.
3336 AcpiExec: Added support to load multiple AML files simultaneously (such as
3338 DSDT and multiple SSDTs). Also added support for wildcards within the AML
3339 pathname. These features allow all machine tables to be easily loaded and
3340 debugged together. ACPICA BZ 804.
3342 Disassembler: Added missing support for disassembly of HEST table Error
3346 ----------------------------------------
3347 30 July 2009. Summary of changes for version 20090730:
3349 The ACPI 4.0 implementation for ACPICA is complete with this release.
3351 1) ACPI CA Core Subsystem:
3353 ACPI 4.0: Added header file support for all new and changed ACPI tables.
3354 Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are new
3355 for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
3357 EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
3359 have been some ACPI 4.0 changes to other existing tables. Split the large
3360 actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
3362 ACPI 4.0: Implemented predefined name validation for all new names. There
3364 31 new names in ACPI 4.0. The predefined validation module was split into
3366 files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
3368 Implemented support for so-called "module-level executable code". This is
3369 executable AML code that exists outside of any control method and is
3371 to be executed at table load time. Although illegal since ACPI 2.0, this
3373 of code still exists and is apparently still being created. Blocks of this
3374 code are now detected and executed as intended. Currently, the code blocks
3375 must exist under either an If, Else, or While construct; these are the
3376 typical cases seen in the field. ACPICA BZ 762. Lin Ming.
3378 Implemented an automatic dynamic repair for predefined names that return
3379 nested Package objects. This applies to predefined names that are defined
3381 return a variable-length Package of sub-packages. If the number of sub-
3382 packages is one, BIOS code is occasionally seen that creates a simple
3384 package with no sub-packages. This code attempts to fix the problem by
3385 wrapping a new package object around the existing package. These methods
3387 be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA BZ
3390 Fixed a regression introduced in 20090625 for the AcpiGetDevices
3392 The _HID/_CID matching was broken and no longer matched IDs correctly.
3396 Fixed a problem with AcpiReset where the reset would silently fail if the
3397 register was one of the protected I/O ports. AcpiReset now bypasses the
3399 validation mechanism. This may eventually be driven into the
3403 Fixed a regression related to the recent update of the AcpiRead/Write
3404 interfaces. A sleep/suspend could fail if the optional PM2 Control
3406 does not exist during an attempt to write the Bus Master Arbitration bit.
3407 (However, some hosts already delete the code that writes this bit, and the
3408 code may in fact be obsolete at this date.) ACPICA BZ 799.
3410 Fixed a problem where AcpiTerminate could fault if inadvertently called
3412 in succession. ACPICA BZ 795.
3414 Example Code and Data Size: These are the sizes for the OS-independent
3415 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3416 debug version of the code includes the debug output trace mechanism and
3418 much larger code and data size.
3421 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
3422 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
3424 Non-Debug Version: 85.5K Code, 18.0K Data, 103.5K Total
3425 Debug Version: 161.6K Code, 50.9K Data, 212.5K Total
3427 2) iASL Compiler/Disassembler and Tools:
3429 ACPI 4.0: Implemented disassembler support for all new ACPI tables and
3430 changes to existing tables. ACPICA BZ 775.
3432 ----------------------------------------
3433 25 June 2009. Summary of changes for version 20090625:
3435 The ACPI 4.0 Specification was released on June 16 and is available at
3436 www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
3437 continue for the next few releases.
3439 1) ACPI CA Core Subsystem:
3441 ACPI 4.0: Implemented interpreter support for the IPMI operation region
3442 address space. Includes support for bi-directional data buffers and an
3444 address space handler (to be installed by an IPMI device driver.) ACPICA
3448 ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT. Includes
3449 support in both the header files and the disassembler.
3451 Completed a major update for the AcpiGetObjectInfo external interface.
3453 - Support for variable, unlimited length HID, UID, and CID strings.
3454 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
3456 - Call the _SxW power methods on behalf of a device object.
3457 - Determine if a device is a PCI root bridge.
3458 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
3459 These changes will require an update to all callers of this interface. See
3460 the updated ACPICA Programmer Reference for details. One new source file
3462 been added - utilities/utids.c. ACPICA BZ 368, 780.
3464 Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
3465 transfers. The Value parameter has been extended from 32 bits to 64 bits
3467 order to support new ACPI 4.0 tables. These changes will require an update
3469 all callers of these interfaces. See the ACPICA Programmer Reference for
3470 details. ACPICA BZ 768.
3472 Fixed several problems with AcpiAttachData. The handler was not invoked
3474 the host node was deleted. The data sub-object was not automatically
3476 when the host node was deleted. The interface to the handler had an unused
3477 parameter, this was removed. ACPICA BZ 778.
3479 Enhanced the function that dumps ACPI table headers. All non-printable
3480 characters in the string fields are now replaced with '?' (Signature,
3482 OemTableId, and CompilerId.) ACPI tables with non-printable characters in
3483 these fields are occasionally seen in the field. ACPICA BZ 788.
3485 Fixed a problem with predefined method repair code where the code that
3486 attempts to repair/convert an object of incorrect type is only executed on
3487 the first time the predefined method is called. The mechanism that
3489 warnings on subsequent calls was interfering with the repair mechanism.
3492 Fixed a possible memory leak in the predefined validation/repair code when
3494 buffer is automatically converted to an expected string object.
3496 Removed obsolete 16-bit files from the distribution and from the current
3498 tree head. ACPICA BZ 776.
3500 Example Code and Data Size: These are the sizes for the OS-independent
3501 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3502 debug version of the code includes the debug output trace mechanism and
3504 much larger code and data size.
3507 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
3508 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
3510 Non-Debug Version: 84.7K Code, 17.8K Data, 102.5K Total
3511 Debug Version: 160.5K Code, 50.6K Data, 211.1K Total
3513 2) iASL Compiler/Disassembler and Tools:
3515 ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
3516 operation region keyword. ACPICA BZ 771, 772. Lin Ming.
3518 ACPI 4.0: iASL - implemented compile-time validation support for all new
3519 predefined names and control methods (31 total). ACPICA BZ 769.
3521 ----------------------------------------
3522 21 May 2009. Summary of changes for version 20090521:
3524 1) ACPI CA Core Subsystem:
3526 Disabled the preservation of the SCI enable bit in the PM1 control
3528 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification to
3530 a "preserved" bit - "OSPM always preserves this bit position", section
3531 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
3532 because the bit needs to be explicitly set by the OS as a workaround. No
3533 machines fail if the bit is not preserved. Therefore, ACPICA no longer
3534 attempts to preserve this bit.
3536 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
3537 incorrectly formed _PRT package could cause a fault. Added validation to
3538 ensure that each package element is actually a sub-package.
3540 Implemented a new interface to install or override a single control
3542 AcpiInstallMethod. This interface is useful when debugging in order to
3544 an existing method or to install a missing method without having to
3546 the entire ACPI table. See the ACPICA Programmer Reference for use and
3547 examples. Lin Ming, Bob Moore.
3549 Fixed several reference count issues with the DdbHandle object that is
3550 created from a Load or LoadTable operator. Prevent premature deletion of
3552 object. Also, mark the object as invalid once the table has been unloaded.
3553 This is needed because the handle itself may not be deleted after the
3555 unload, depending on whether it has been stored in a named object by the
3558 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
3559 mutexes of the same sync level are acquired but then not released in
3561 opposite order, the internally maintained Current Sync Level becomes
3563 and can cause subsequent execution errors. ACPICA BZ 471.
3565 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
3566 specification has been changed to make the SyncLevel for mutex objects
3568 useful. When releasing a mutex, the SyncLevel of the mutex must now be the
3569 same as the current sync level. This makes more sense than the previous
3571 (SyncLevel less than or equal). This change updates the code to match the
3574 Fixed a problem with the local version of the AcpiOsPurgeCache function.
3576 (local) cache must be locked during all cache object deletions. Andrew
3579 Updated the Load operator to use operation region interfaces. This
3581 direct memory mapping with region access calls. Now, all region accesses
3583 through the installed region handler as they should.
3585 Simplified and optimized the NsGetNextNode function. Reduced parameter
3587 and reduced code for this frequently used function.
3589 Example Code and Data Size: These are the sizes for the OS-independent
3590 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3591 debug version of the code includes the debug output trace mechanism and
3593 much larger code and data size.
3596 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
3597 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
3599 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
3600 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
3602 2) iASL Compiler/Disassembler and Tools:
3604 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
3606 with sub-table disassembly and handling invalid sub-tables. Attempt
3608 after an invalid sub-table ID.
3610 ----------------------------------------
3611 22 April 2009. Summary of changes for version 20090422:
3613 1) ACPI CA Core Subsystem:
3615 Fixed a compatibility issue with the recently released I/O port protection
3616 mechanism. For windows compatibility, 1) On a port protection violation,
3617 simply ignore the request and do not return an exception (allow the
3619 method to continue execution.) 2) If only part of the request overlaps a
3620 protected port, read/write the individual ports that are not protected.
3624 Enhanced the execution of the ASL/AML BreakPoint operator so that it
3626 breaks into the AML debugger if the debugger is present. This matches the
3627 ACPI-defined behavior.
3629 Fixed several possible warnings related to the use of the configurable
3630 ACPI_THREAD_ID. This type can now be configured as either an integer or a
3631 pointer with no warnings. Also fixes several warnings in printf-like
3632 statements for the 64-bit build when the type is configured as a pointer.
3635 Fixed a number of possible warnings when compiling with gcc 4+ (depending
3637 warning options.) Examples include printf formats, aliasing, unused
3639 missing prototypes, missing switch default statements, use of non-ANSI
3640 library functions, use of non-ANSI constructs. See generate/unix/Makefile
3642 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
3644 Example Code and Data Size: These are the sizes for the OS-independent
3645 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3646 debug version of the code includes the debug output trace mechanism and
3648 much larger code and data size.
3651 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
3652 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
3654 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
3655 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
3657 2) iASL Compiler/Disassembler and Tools:
3659 iASL: Fixed a generation warning from Bison 2.3 and fixed several warnings
3663 iASL: Fixed a problem where the Unix/Linux versions of the compiler could
3665 correctly digest Windows/DOS formatted files (with CR/LF).
3667 iASL: Added a new option for "quiet mode" (-va) that produces only the
3668 compilation summary, not individual errors and warnings. Useful for large
3671 AcpiExec: Implemented a new option (-z) to enable a forced semaphore/mutex
3672 timeout that can be used to detect hang conditions during execution of AML
3673 code (includes both internal semaphores and AML-defined mutexes and
3676 Added new makefiles for the generation of acpica in a generic unix-like
3677 environment. These makefiles are intended to generate the acpica tools and
3678 utilities from the original acpica git source tree structure.
3680 Test Suites: Updated and cleaned up the documentation files. Updated the
3681 copyrights to 2009, affecting all source files. Use the new version of
3683 with quiet mode. Increased the number of available semaphores in the
3685 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
3687 an alternate implementation of the semaphore timeout to allow aslts to
3688 execute fully on Cygwin.
3690 ----------------------------------------
3691 20 March 2009. Summary of changes for version 20090320:
3693 1) ACPI CA Core Subsystem:
3695 Fixed a possible race condition between AcpiWalkNamespace and dynamic
3697 unloads. Added a reader/writer locking mechanism to allow multiple
3699 namespace walks (readers), but block a dynamic table unload until it can
3701 exclusive write access to the namespace. This fixes a problem where a
3703 unload could (possibly catastrophically) delete the portion of the
3705 that is currently being examined by a walk. Adds a new file, utlock.c,
3707 implements the reader/writer lock mechanism. ACPICA BZ 749.
3709 Fixed a regression introduced in version 20090220 where a change to the
3711 handling could cause the ACPICA subsystem to access non-existent I/O
3714 Modified the handling of FADT register and table (FACS/DSDT) addresses.
3716 FADT can contain both 32-bit and 64-bit versions of these addresses.
3717 Previously, the 64-bit versions were favored, meaning that if both 32 and
3719 versions were valid, but not equal, the 64-bit version was used. This was
3720 found to cause some machines to fail. Now, in this case, the 32-bit
3722 is used instead. This now matches the Windows behavior.
3724 Implemented a new mechanism to protect certain I/O ports. Provides
3726 compatibility and protects the standard PC I/O ports from access via AML
3727 code. Adds a new file, hwvalid.c
3729 Fixed a possible extraneous warning message from the FADT support. The
3730 message warns of a 32/64 length mismatch between the legacy and GAS
3731 definitions for a register.
3733 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
3735 made obsolete by the port protection mechanism above. It was previously
3737 to validate the entire address range of an operation region, which could
3739 incorrect if the range included illegal ports, but fields within the
3740 operation region did not actually access those ports. Validation is now
3741 performed on a per-field basis instead of the entire region.
3743 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
3744 Ignored bits must be "preserved" according to the ACPI spec. Usually, this
3745 means a read/modify/write when writing to the register. However, for
3747 registers, writing a one means clear the event. Writing a zero means
3749 the event (do not clear.) This behavior is clarified in the ACPI 4.0 spec,
3750 and the ACPICA code now simply always writes a zero to the ignored bit.
3752 Modified the handling of ignored bits for the PM1 A/B Control Registers.
3754 per the ACPI specification, for the control registers, preserve
3755 (read/modify/write) all bits that are defined as either reserved or
3758 Updated the handling of write-only bits in the PM1 A/B Control Registers.
3759 When reading the register, zero the write-only bits as per the ACPI spec.
3760 ACPICA BZ 443. Lin Ming.
3762 Removed "Linux" from the list of supported _OSI strings. Linux no longer
3763 wants to reply true to this request. The Windows strings are the only
3765 through the AML that are tested and known to work properly.
3768 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
3769 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
3771 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
3772 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
3774 2) iASL Compiler/Disassembler and Tools:
3776 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
3780 ----------------------------------------
3781 20 February 2009. Summary of changes for version 20090220:
3783 1) ACPI CA Core Subsystem:
3785 Optimized the ACPI register locking. Removed locking for reads from the
3787 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is
3788 not required when reading the single-bit registers. The
3789 AcpiGetRegisterUnlocked function is no longer needed and has been removed.
3790 This will improve performance for reads on these registers. ACPICA BZ 760.
3792 Fixed the parameter validation for AcpiRead/Write. Now return
3793 AE_BAD_PARAMETER if the input register pointer is null, and AE_BAD_ADDRESS
3795 the register has an address of zero. Previously, these cases simply
3797 AE_OK. For optional registers such as PM1B status/enable/control, the
3799 should check for a valid register address before calling. ACPICA BZ 748.
3801 Renamed the external ACPI bit register access functions. Renamed
3802 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
3803 functions. The new names are AcpiReadBitRegister and AcpiWriteBitRegister.
3804 Also, restructured the code for these functions by simplifying the code
3806 and condensing duplicate code to reduce code size.
3808 Added new functions to transparently handle the possibly split PM1 A/B
3809 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two functions
3810 now handle the split registers for PM1 Status, Enable, and Control. ACPICA
3814 Added a function to handle the PM1 control registers,
3815 AcpiHwWritePm1Control.
3816 This function writes both of the PM1 control registers (A/B). These
3818 are different than the PM1 A/B status and enable registers in that
3820 values can be written to the A/B registers. Most notably, the SLP_TYP bits
3821 can be different, as per the values returned from the _Sx predefined
3824 Removed an extra register write within AcpiHwClearAcpiStatus. This
3826 was writing an optional PM1B status register twice. The existing call to
3828 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
3830 register. ACPICA BZ 751.
3832 Split out the PM1 Status registers from the FADT. Added new globals for
3834 registers (A/B), similar to the way the PM1 Enable registers are handled.
3835 Instead of overloading the FADT Event Register blocks. This makes the code
3836 clearer and less prone to error.
3838 Fixed the warning message for when the platform contains too many ACPI
3840 for the default size of the global root table data structure. The
3842 for the truncation value was incorrect.
3844 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
3845 obsolete macro, since it is now a simple reference to ->common.type. There
3846 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
3848 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
3849 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
3850 simply SLEEP_TYPE. ACPICA BZ 754.
3852 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
3853 function is only needed on 64-bit host operating systems and is thus not
3854 included for 32-bit hosts.
3856 Debug output: print the input and result for invocations of the _OSI
3858 control method via the ACPI_LV_INFO debug level. Also, reduced some of the
3859 verbosity of this debug level. Len Brown.
3861 Example Code and Data Size: These are the sizes for the OS-independent
3862 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3863 debug version of the code includes the debug output trace mechanism and
3865 much larger code and data size.
3868 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
3869 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
3871 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
3872 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
3874 2) iASL Compiler/Disassembler and Tools:
3876 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
3877 various legal performance profiles.
3879 ----------------------------------------
3880 23 January 2009. Summary of changes for version 20090123:
3882 1) ACPI CA Core Subsystem:
3884 Added the 2009 copyright to all module headers and signons. This affects
3885 virtually every file in the ACPICA core subsystem, the iASL compiler, and
3886 the tools/utilities.
3888 Implemented a change to allow the host to override any ACPI table,
3890 dynamically loaded tables. Previously, only the DSDT could be replaced by
3892 host. With this change, the AcpiOsTableOverride interface is called for
3894 table found in the RSDT/XSDT during ACPICA initialization, and also
3896 a table is dynamically loaded via the AML Load operator.
3898 Updated FADT flag definitions, especially the Boot Architecture flags.
3900 Debugger: For the Find command, automatically pad the input ACPI name with
3901 underscores if the name is shorter than 4 characters. This enables a match
3902 with the actual namespace entry which is itself padded with underscores.
3904 Example Code and Data Size: These are the sizes for the OS-independent
3905 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3906 debug version of the code includes the debug output trace mechanism and
3908 much larger code and data size.
3911 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
3912 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
3914 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
3915 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
3917 2) iASL Compiler/Disassembler and Tools:
3919 Fix build error under Bison-2.4.
3921 Dissasembler: Enhanced FADT support. Added decoding of the Boot
3923 flags. Now decode all flags, regardless of the FADT version. Flag output
3924 includes the FADT version which first defined each flag.
3926 The iASL -g option now dumps the RSDT to a file (in addition to the FADT
3928 DSDT). Windows only.
3930 ----------------------------------------
3931 04 December 2008. Summary of changes for version 20081204:
3933 1) ACPI CA Core Subsystem:
3935 The ACPICA Programmer Reference has been completely updated and revamped
3937 this release. This includes updates to the external interfaces, OSL
3938 interfaces, the overview sections, and the debugger reference.
3940 Several new ACPICA interfaces have been implemented and documented in the
3941 programmer reference:
3942 AcpiReset - Writes the reset value to the FADT-defined reset register.
3943 AcpiDisableAllGpes - Disable all available GPEs.
3944 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
3945 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
3946 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
3947 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
3948 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
3950 Most of the public ACPI hardware-related interfaces have been moved to a
3952 file, components/hardware/hwxface.c
3954 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
3955 register lengths within the FADT are now used, and the low level ACPI
3956 register access no longer hardcodes the ACPI register lengths. Given that
3957 there may be some risk in actually trusting the FADT register lengths, a
3959 time option was added to fall back to the default hardcoded lengths if the
3960 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
3961 option is set to true for now, and a warning is issued if a suspicious
3963 register length is overridden with the default value.
3965 Fixed a reference count issue in NsRepairObject. This problem was
3967 in version 20081031 as part of a fix to repair Buffer objects within
3970 Added semaphore support to the Linux/Unix application OS-services layer
3971 (OSL). ACPICA BZ 448. Lin Ming.
3973 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
3975 be implemented in the OSL, or will binary semaphores be used instead.
3977 Example Code and Data Size: These are the sizes for the OS-independent
3978 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
3979 debug version of the code includes the debug output trace mechanism and
3981 much larger code and data size.
3984 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
3985 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
3987 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
3988 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
3990 2) iASL Compiler/Disassembler and Tools:
3992 iASL: Completed the '-e' option to include additional ACPI tables in order
3994 aid with disassembly and External statement generation. ACPICA BZ 742. Lin
3997 iASL: Removed the "named object in while loop" error. The compiler cannot
3998 determine how many times a loop will execute. ACPICA BZ 730.
4000 Disassembler: Implemented support for FADT revision 2 (MS extension).
4004 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and MCFG).
4006 ----------------------------------------
4007 31 October 2008. Summary of changes for version 20081031:
4009 1) ACPI CA Core Subsystem:
4011 Restructured the ACPICA header files into public/private. acpi.h now
4013 only the "public" acpica headers. All other acpica headers are "private"
4015 should not be included by acpica users. One new file, accommon.h is used
4017 include the commonly used private headers for acpica code generation.
4019 plans include moving all private headers to a new subdirectory.
4021 Implemented an automatic Buffer->String return value conversion for
4022 predefined ACPI methods. For these methods (such as _BIF), added automatic
4023 conversion for return objects that are required to be a String, but a
4025 was found instead. This can happen when reading string battery data from
4027 operation region, because it used to be difficult to convert the data from
4028 buffer to string from within the ASL. Ensures that the host OS is provided
4029 with a valid null-terminated string. Linux BZ 11822.
4031 Updated the FACS waking vector interfaces. Split
4032 AcpiSetFirmwareWakingVector
4033 into two: one for the 32-bit vector, another for the 64-bit vector. This
4035 required because the host OS must setup the wake much differently for each
4036 vector (real vs. protected mode, etc.) and the interface itself should not
4038 deciding which vector to use. Also, eliminated the GetFirmwareWakingVector
4039 interface, as it served no purpose (only the firmware reads the vector, OS
4040 only writes the vector.) ACPICA BZ 731.
4042 Implemented a mechanism to escape infinite AML While() loops. Added a loop
4043 counter to force exit from AML While loops if the count becomes too large.
4044 This can occur in poorly written AML when the hardware does not respond
4045 within a while loop and the loop does not implement a timeout. The maximum
4046 loop count is configurable. A new exception code is returned when a loop
4048 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
4050 Optimized the execution of AML While loops. Previously, a control state
4051 object was allocated and freed for each execution of the loop. The
4052 optimization is to simply reuse the control state for each iteration. This
4053 speeds up the raw loop execution time by about 5%.
4055 Enhanced the implicit return mechanism. For Windows compatibility, return
4057 implicit integer of value zero for methods that contain no executable
4059 Such methods are seen in the field as stubs (presumably), and can cause
4060 drivers to fail if they expect a return value. Lin Ming.
4062 Allow multiple backslashes as root prefixes in namepaths. In a fully
4063 qualified namepath, allow multiple backslash prefixes. This can happen
4065 is seen in the field) because of the use of a double-backslash in strings
4066 (since backslash is the escape character) causing confusion. ACPICA BZ 739
4069 Emit a warning if two different FACS or DSDT tables are discovered in the
4070 FADT. Checks if there are two valid but different addresses for the FACS
4072 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
4074 Consolidated the method argument count validation code. Merged the code
4076 validates control method argument counts into the predefined validation
4077 module. Eliminates possible multiple warnings for incorrect argument
4080 Implemented ACPICA example code. Includes code for ACPICA initialization,
4081 handler installation, and calling a control method. Available at
4082 source/tools/examples.
4084 Added a global pointer for FACS table to simplify internal FACS access.
4086 the global pointer instead of using AcpiGetTableByIndex for each FACS
4088 This simplifies the code for the Global Lock and the Firmware Waking
4091 Example Code and Data Size: These are the sizes for the OS-independent
4092 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4093 debug version of the code includes the debug output trace mechanism and
4095 much larger code and data size.
4098 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
4099 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
4101 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
4102 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
4104 2) iASL Compiler/Disassembler and Tools:
4106 iASL: Improved disassembly of external method calls. Added the -e option
4108 allow the inclusion of additional ACPI tables to help with the disassembly
4110 method invocations and the generation of external declarations during the
4111 disassembly. Certain external method invocations cannot be disassembled
4112 properly without the actual declaration of the method. Use the -e option
4114 include the table where the external method(s) are actually declared. Most
4115 useful for disassembling SSDTs that make method calls back to the master
4116 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl
4118 -e dsdt.aml ssdt1.aml
4120 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
4121 problem where the use of an alias within a namepath would result in a not
4122 found error or cause the compiler to fault. Also now allows forward
4123 references from the Alias operator itself. ACPICA BZ 738.
4125 ----------------------------------------
4126 26 September 2008. Summary of changes for version 20080926:
4128 1) ACPI CA Core Subsystem:
4130 Designed and implemented a mechanism to validate predefined ACPI methods
4132 objects. This code validates the predefined ACPI objects (objects whose
4134 start with underscore) that appear in the namespace, at the time they are
4135 evaluated. The argument count and the type of the returned object are
4136 validated against the ACPI specification. The purpose of this validation
4138 to detect problems with the BIOS-implemented predefined ACPI objects
4140 the results are returned to the ACPI-related drivers. Future enhancements
4142 include actual repair of incorrect return objects where possible. Two new
4143 files are nspredef.c and acpredef.h.
4145 Fixed a fault in the AML parser if a memory allocation fails during the Op
4146 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
4148 Fixed an issue with implicit return compatibility. This change improves
4150 implicit return mechanism to be more compatible with the MS interpreter.
4152 Ming, ACPICA BZ 349.
4154 Implemented support for zero-length buffer-to-string conversions. Allow
4156 length strings during interpreter buffer-to-string conversions. For
4158 during the ToDecimalString and ToHexString operators, as well as implicit
4159 conversions. Fiodor Suietov, ACPICA BZ 585.
4161 Fixed two possible memory leaks in the error exit paths of
4162 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions are
4163 similar in that they use a stack of state objects in order to eliminate
4164 recursion. The stack must be fully unwound and deallocated if an error
4165 occurs. Lin Ming. ACPICA BZ 383.
4167 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
4169 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
4170 Moore ACPICA BZ 442.
4172 Removed the obsolete version number in module headers. Removed the
4173 "$Revision" number that appeared in each module header. This version
4175 was useful under SourceSafe and CVS, but has no meaning under git. It is
4177 only incorrect, it could also be misleading.
4179 Example Code and Data Size: These are the sizes for the OS-independent
4180 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4181 debug version of the code includes the debug output trace mechanism and
4183 much larger code and data size.
4186 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
4187 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
4189 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
4190 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
4192 ----------------------------------------
4193 29 August 2008. Summary of changes for version 20080829:
4195 1) ACPI CA Core Subsystem:
4197 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
4198 Reference. Changes include the elimination of cheating on the Object field
4199 for the DdbHandle subtype, addition of a reference class field to
4200 differentiate the various reference types (instead of an AML opcode), and
4202 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
4204 Reduce an error to a warning for an incorrect method argument count.
4205 Previously aborted with an error if too few arguments were passed to a
4206 control method via the external ACPICA interface. Now issue a warning
4208 and continue. Handles the case where the method inadvertently declares too
4209 many arguments, but does not actually use the extra ones. Applies mainly
4211 the predefined methods. Lin Ming. Linux BZ 11032.
4213 Disallow the evaluation of named object types with no intrinsic value.
4215 AE_TYPE for objects that have no value and therefore evaluation is
4217 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
4219 these types were allowed, but an exception would be generated at some
4221 during the evaluation. Now, the error is generated up front.
4223 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
4224 (nsnames.c). Fixes a leak in the error exit path.
4226 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
4228 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
4230 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
4233 Removed obsolete and/or unused exception codes from the acexcep.h header.
4234 There is the possibility that certain device drivers may be affected if
4236 use any of these exceptions.
4238 The ACPICA documentation has been added to the public git source tree,
4240 acpica/documents. Included are the ACPICA programmer reference, the iASL
4241 compiler reference, and the changes.txt release logfile.
4243 Example Code and Data Size: These are the sizes for the OS-independent
4244 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4245 debug version of the code includes the debug output trace mechanism and
4247 much larger code and data size.
4250 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
4251 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
4253 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
4254 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
4256 2) iASL Compiler/Disassembler and Tools:
4258 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
4259 defines _SCP with 3 arguments. Previous versions defined it with only 1
4260 argument. iASL now allows both definitions.
4262 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for zero-
4263 length subtables when disassembling ACPI tables. Also fixed a couple of
4264 errors where a full 16-bit table type field was not extracted from the
4268 acpisrc: Improve comment counting mechanism for generating source code
4269 statistics. Count first and last lines of multi-line comments as
4271 not comment lines. Handle Linux legal header in addition to standard
4275 ----------------------------------------
4277 29 July 2008. Summary of changes for version 20080729:
4279 1) ACPI CA Core Subsystem:
4281 Fix a possible deadlock in the GPE dispatch. Remove call to
4282 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
4284 to acquire the GPE lock but can deadlock since the GPE lock is already
4286 at dispatch time. This code was introduced in version 20060831 as a
4288 to Linux BZ 6881 and has since been removed from Linux.
4290 Add a function to dereference returned reference objects. Examines the
4292 object from a call to AcpiEvaluateObject. Any Index or RefOf references
4294 automatically dereferenced in an attempt to return something useful (these
4295 reference types cannot be converted into an external ACPI_OBJECT.)
4297 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
4299 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
4300 subtables for the MADT and one new subtable for the SRAT. Includes
4301 disassembler and AcpiSrc support. Data from the Intel 64 Architecture
4303 Specification, June 2008.
4305 Additional error checking for pathname utilities. Add error check after
4307 calls to AcpiNsGetPathnameLength. Add status return from
4308 AcpiNsBuildExternalPath and check after all calls. Add parameter
4310 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
4312 Return status from the global init function AcpiUtGlobalInitialize. This
4314 used by both the kernel subsystem and the utilities such as iASL compiler.
4315 The function could possibly fail when the caches are initialized. Yang Yi.
4317 Add a function to decode reference object types to strings. Created for
4318 improved error messages.
4320 Improve object conversion error messages. Better error messages during
4322 conversion from internal to the external ACPI_OBJECT. Used for external
4324 to AcpiEvaluateObject.
4326 Example Code and Data Size: These are the sizes for the OS-independent
4327 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4328 debug version of the code includes the debug output trace mechanism and
4330 much larger code and data size.
4333 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
4334 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
4336 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
4337 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
4339 2) iASL Compiler/Disassembler and Tools:
4341 Debugger: fix a possible hang when evaluating non-methods. Fixes a problem
4342 introduced in version 20080701. If the object being evaluated (via execute
4343 command) is not a method, the debugger can hang while trying to obtain
4345 existent parameters.
4347 iASL: relax error for using reserved "_T_x" identifiers. These names can
4348 appear in a disassembled ASL file if they were emitted by the original
4349 compiler. Instead of issuing an error or warning and forcing the user to
4350 manually change these names, issue a remark instead.
4352 iASL: error if named object created in while loop. Emit an error if any
4354 object is created within a While loop. If allowed, this code will generate
4356 run-time error on the second iteration of the loop when an attempt is made
4358 create the same named object twice. ACPICA bugzilla 730.
4360 iASL: Support absolute pathnames for include files. Add support for
4362 pathnames within the Include operator. previously, only relative pathnames
4365 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
4367 The ACPI spec requires one interrupt minimum. BZ 423
4369 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
4370 Handles the case for the Interrupt Resource Descriptor where
4371 the ResourceSource argument is omitted but ResourceSourceIndex
4372 is present. Now leave room for the Index. BZ 426
4374 iASL: Prevent error message if CondRefOf target does not exist. Fixes
4376 where an error message is emitted if the target does not exist. BZ 516
4378 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
4379 (get ACPI tables on Windows). This was apparently broken in version
4382 AcpiXtract: Handle EOF while extracting data. Correctly handle the case
4384 the EOF happens immediately after the last table in the input file. Print
4385 completion message. Previously, no message was displayed in this case.
4387 ----------------------------------------
4388 01 July 2008. Summary of changes for version 20080701:
4390 0) Git source tree / acpica.org
4392 Fixed a problem where a git-clone from http would not transfer the entire
4395 1) ACPI CA Core Subsystem:
4397 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
4398 enable bit. Now performs a read-change-write of the enable register
4400 of simply writing out the cached enable mask. This will prevent
4402 enabling of GPEs if a rogue GPE is received during initialization (before
4404 handlers are installed.)
4406 Implemented a copy for dynamically loaded tables. Previously, dynamically
4407 loaded tables were simply mapped - but on some machines this memory is
4408 corrupted after suspend. Now copy the table to a local buffer. For the
4409 OpRegion case, added checksum verify. Use the table length from the table
4410 header, not the region length. For the Buffer case, use the table length
4411 also. Dennis Noordsij, Bob Moore. BZ 10734
4413 Fixed a problem where the same ACPI table could not be dynamically loaded
4415 unloaded more than once. Without this change, a table cannot be loaded
4417 once it has been loaded/unloaded one time. The current mechanism does not
4418 unregister a table upon an unload. During a load, if the same table is
4420 this no longer returns an exception. BZ 722
4422 Fixed a problem where the wrong descriptor length was calculated for the
4423 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as EndTag
4424 are calculated as 12 bytes long, but the actual length in the internal
4425 descriptor is 16 because of the round-up to 8 on the 64-bit build.
4427 by Linn Crosetto. BZ 728
4429 Fixed a possible memory leak in the Unload operator. The DdbHandle
4431 by Load() did not have its reference count decremented during unload,
4433 to a memory leak. Lin Ming. BZ 727
4435 Fixed a possible memory leak when deleting thermal/processor objects. Any
4436 associated notify handlers (and objects) were not being deleted. Fiodor
4439 Fixed the ordering of the ASCII names in the global mutex table to match
4441 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
4443 Vegard Nossum. BZ 726
4445 Enhanced the AcpiGetObjectInfo interface to return the number of required
4446 arguments if the object is a control method. Added this call to the
4448 so the proper number of default arguments are passed to a method. This
4449 prevents a warning when executing methods from AcpiExec.
4451 Added a check for an invalid handle in AcpiGetObjectInfo. Return
4452 AE_BAD_PARAMETER if input handle is invalid. BZ 474
4454 Fixed an extraneous warning from exconfig.c on the 64-bit build.
4456 Example Code and Data Size: These are the sizes for the OS-independent
4457 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4458 debug version of the code includes the debug output trace mechanism and
4460 much larger code and data size.
4463 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
4464 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
4466 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
4467 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
4469 2) iASL Compiler/Disassembler and Tools:
4471 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
4472 resource descriptor names.
4474 iASL: Detect invalid ASCII characters in input (windows version). Removed
4476 "-CF" flag from the flex compile, enables correct detection of non-ASCII
4477 characters in the input. BZ 441
4479 iASL: Eliminate warning when result of LoadTable is not used. Eliminate
4481 "result of operation not used" warning when the DDB handle returned from
4482 LoadTable is not used. The warning is not needed. BZ 590
4484 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG method
4486 pass address of table to the AML. Added option to disable OpRegion
4488 to allow creation of an OpRegion with a real address that was passed to
4490 All of this allows testing of the Load and Unload operators from AcpiExec.
4492 Debugger: update tables command for unloaded tables. Handle unloaded
4494 and use the standard table header output routine.
4496 ----------------------------------------
4497 09 June 2008. Summary of changes for version 20080609:
4499 1) ACPI CA Core Subsystem:
4501 Implemented a workaround for reversed _PRT entries. A significant number
4503 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
4504 change dynamically detects and repairs this problem. Provides
4506 with MS ACPI. BZ 6859
4508 Simplified the internal ACPI hardware interfaces to eliminate the locking
4509 flag parameter from Register Read/Write. Added a new external interface,
4510 AcpiGetRegisterUnlocked.
4512 Fixed a problem where the invocation of a GPE control method could hang.
4514 was a regression introduced in 20080514. The new method argument count
4515 validation mechanism can enter an infinite loop when a GPE method is
4516 dispatched. Problem fixed by removing the obsolete code that passed GPE
4518 information to the notify handler via the control method parameter
4521 Fixed a problem where the _SST execution status was incorrectly returned
4523 the caller of AcpiEnterSleepStatePrep. This was a regression introduced in
4524 20080514. _SST is optional and a NOT_FOUND exception should never be
4527 Fixed a problem where a deleted object could be accessed from within the
4529 parser. This was a regression introduced in version 20080123 as a fix for
4531 Unload operator. Lin Ming. BZ 10669
4533 Cleaned up the debug operand dump mechanism. Eliminated unnecessary
4535 and eliminated the use of a negative index in a loop. Operands are now
4536 displayed in the correct order, not backwards. This also fixes a
4538 introduced in 20080514 on 64-bit systems where the elimination of
4539 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
4542 Fixed a possible memory leak in EvPciConfigRegionSetup where the error
4544 path did not delete a locally allocated structure.
4546 Updated definitions for the DMAR and SRAT tables to synchronize with the
4547 current specifications. Includes disassembler support.
4549 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
4550 loop termination value was used. Loop terminated on iteration early,
4552 one mutex. Linn Crosetto
4554 Example Code and Data Size: These are the sizes for the OS-independent
4555 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4556 debug version of the code includes the debug output trace mechanism and
4558 much larger code and data size.
4561 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
4562 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
4564 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
4565 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
4567 2) iASL Compiler/Disassembler and Tools:
4569 Disassembler: Implemented support for EisaId() within _CID objects. Now
4570 disassemble integer _CID objects back to EisaId invocations, including
4571 multiple integers within _CID packages. Includes single-step support for
4574 Disassembler: Added support for DMAR and SRAT table definition changes.
4576 ----------------------------------------
4577 14 May 2008. Summary of changes for version 20080514:
4579 1) ACPI CA Core Subsystem:
4581 Fixed a problem where GPEs were enabled too early during the ACPICA
4582 initialization. This could lead to "handler not installed" errors on some
4583 machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
4585 ensures that all operation regions and devices throughout the namespace
4587 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
4589 Implemented a change to the enter sleep code. Moved execution of the _GTS
4590 method to just before setting sleep enable bit. The execution was moved
4592 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
4593 immediately before the SLP_EN bit is set, as per the ACPI specification.
4596 Implemented a fix to disable unknown GPEs (2nd version). Now always
4598 the GPE, even if ACPICA thinks that that it is already disabled. It is
4599 possible that the AML or some other code has enabled the GPE unbeknownst
4603 Fixed a problem with the Field operator where zero-length fields would
4605 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
4607 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
4609 Implemented a fix for the Load operator, now load the table at the
4611 root. This reverts a change introduced in version 20071019. The table is
4613 loaded at the namespace root even though this goes against the ACPI
4614 specification. This provides compatibility with other ACPI
4616 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
4619 Fixed a problem where ACPICA would not Load() tables with unusual
4621 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
4622 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
4623 Therefore, signature validation is worthless. Apparently MS ACPI accepts
4625 signatures, ACPICA must be compatible. BZ 10454.
4627 Fixed a possible negative array index in AcpiUtValidateException. Added
4629 fields to the exception string arrays to eliminate a -1 subtraction on the
4632 Updated the debug tracking macros to reduce overall code and data size.
4633 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
4634 instead of pointers to static strings. Jan Beulich and Bob Moore.
4636 Implemented argument count checking in control method invocation via
4637 AcpiEvaluateObject. Now emit an error if too few arguments, warning if too
4638 many. This applies only to extern programmatic control method execution,
4640 method-to-method calls within the AML. Lin Ming.
4642 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
4644 longer needed, especially with the removal of 16-bit support. It was
4646 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64 bit
4648 32/64-bit platforms is required.
4650 Added the C const qualifier for appropriate string constants -- mostly
4651 MODULE_NAME and printf format strings. Jan Beulich.
4653 Example Code and Data Size: These are the sizes for the OS-independent
4654 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4655 debug version of the code includes the debug output trace mechanism and
4657 much larger code and data size.
4660 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
4661 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
4663 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
4664 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
4666 2) iASL Compiler/Disassembler and Tools:
4668 Implemented ACPI table revision ID validation in the disassembler. Zero is
4669 always invalid. For DSDTs, the ID controls the interpreter integer width.
4671 means 32-bit and this is unusual. 2 or greater is 64-bit.
4673 ----------------------------------------
4674 21 March 2008. Summary of changes for version 20080321:
4676 1) ACPI CA Core Subsystem:
4678 Implemented an additional change to the GPE support in order to suppress
4679 spurious or stray GPEs. The AcpiEvDisableGpe function will now permanently
4680 disable incoming GPEs that are neither enabled nor disabled -- meaning
4682 the GPE is unknown to the system. This should prevent future interrupt
4684 from that GPE. BZ 6217 (Zhang Rui)
4686 Fixed a problem where NULL package elements were not returned to the
4687 AcpiEvaluateObject interface correctly. The element was simply ignored
4688 instead of returning a NULL ACPI_OBJECT package element, potentially
4690 a buffer overflow and/or confusing the caller who expected a fixed number
4692 elements. BZ 10132 (Lin Ming, Bob Moore)
4694 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
4696 Qword), Field, BankField, and IndexField operators when invoked from
4698 an executing control method. In this case, these operators created
4700 nodes that were incorrectly left marked as permanent nodes instead of
4701 temporary nodes. This could cause a problem if there is race condition
4702 between an exiting control method and a running namespace walk. (Reported
4706 Fixed a problem where the CreateField and CreateXXXField operators would
4707 incorrectly allow duplicate names (the name of the field) with no
4711 Implemented several changes for Notify handling. Added support for new
4713 values (ACPI 2.0+) and improved the Notify debug output. Notify on
4714 PowerResource objects is no longer allowed, as per the ACPI specification.
4715 (Bob Moore, Zhang Rui)
4717 All Reference Objects returned via the AcpiEvaluateObject interface are
4719 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
4721 NULL objects - either NULL package elements or unresolved named
4724 Fixed a problem where an extraneous debug message was produced for package
4725 objects (when debugging enabled). The message "Package List length larger
4726 than NumElements count" is now produced in the correct case, and is now an
4727 error message rather than a debug message. Added a debug message for the
4728 opposite case, where NumElements is larger than the Package List (the
4730 will be padded out with NULL elements as per the ACPI spec.)
4732 Implemented several improvements for the output of the ASL "Debug" object
4734 clarify and keep all data for a given object on one output line.
4736 Fixed two size calculation issues with the variable-length Start Dependent
4737 resource descriptor.
4739 Example Code and Data Size: These are the sizes for the OS-independent
4740 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4741 debug version of the code includes the debug output trace mechanism and
4743 a much larger code and data size.
4746 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
4747 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
4749 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
4750 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
4752 2) iASL Compiler/Disassembler and Tools:
4754 Fixed a problem with the use of the Switch operator where execution of the
4755 containing method by multiple concurrent threads could cause an
4756 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
4757 actual Switch opcode, it must be simulated with local named temporary
4758 variables and if/else pairs. The solution chosen was to mark any method
4760 uses Switch as Serialized, thus preventing multiple thread entries. BZ
4763 ----------------------------------------
4764 13 February 2008. Summary of changes for version 20080213:
4766 1) ACPI CA Core Subsystem:
4768 Implemented another MS compatibility design change for GPE/Notify
4770 GPEs are now cleared/enabled asynchronously to allow all pending notifies
4772 complete first. It is expected that the OSL will queue the enable request
4773 behind all pending notify requests (may require changes to the local host
4775 in AcpiOsExecute). Alexey Starikovskiy.
4777 Fixed a problem where buffer and package objects passed as arguments to a
4778 control method via the external AcpiEvaluateObject interface could cause
4780 AE_AML_INTERNAL exception depending on the order and type of operators
4781 executed by the target control method.
4783 Fixed a problem where resource descriptor size optimization could cause a
4784 problem when a _CRS resource template is passed to a _SRS method. The _SRS
4785 resource template must use the same descriptors (with the same size) as
4786 returned from _CRS. This change affects the following resource
4788 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
4791 Fixed a problem where a CopyObject to RegionField, BankField, and
4793 objects did not perform an implicit conversion as it should. These types
4795 retain their initial type permanently as per the ACPI specification.
4797 a CopyObject to all other object types should not perform an implicit
4798 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
4800 Fixed a problem with the AcpiGetDevices interface where the mechanism to
4801 match device CIDs did not examine the entire list of available CIDs, but
4802 instead aborted on the first non-matching CID. Andrew Patterson.
4804 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
4806 inadvertently changed to return a 16-bit value instead of a 32-bit value,
4807 truncating the upper dword of a 64-bit value. This macro is only used to
4808 display debug output, so no incorrect calculations were made. Also,
4809 reimplemented the macro so that a 64-bit shift is not performed by
4810 inefficient compilers.
4812 Added missing va_end statements that should correspond with each va_start
4815 Example Code and Data Size: These are the sizes for the OS-independent
4816 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4817 debug version of the code includes the debug output trace mechanism and
4819 a much larger code and data size.
4822 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
4823 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
4825 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
4826 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
4828 2) iASL Compiler/Disassembler and Tools:
4830 Implemented full disassembler support for the following new ACPI tables:
4831 BERT, EINJ, and ERST. Implemented partial disassembler support for the
4832 complicated HEST table. These tables support the Windows Hardware Error
4833 Architecture (WHEA).
4835 ----------------------------------------
4836 23 January 2008. Summary of changes for version 20080123:
4838 1) ACPI CA Core Subsystem:
4840 Added the 2008 copyright to all module headers and signons. This affects
4841 virtually every file in the ACPICA core subsystem, the iASL compiler, and
4842 the tools/utilities.
4844 Fixed a problem with the SizeOf operator when used with Package and Buffer
4845 objects. These objects have deferred execution for some arguments, and the
4846 execution is now completed before the SizeOf is executed. This problem
4848 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
4852 Implemented an enhancement to the interpreter "slack mode". In the absence
4854 an explicit return or an implicitly returned object from the last executed
4855 opcode, a control method will now implicitly return an integer of value 0
4857 Microsoft compatibility. (Lin Ming) BZ 392
4859 Fixed a problem with the Load operator where an exception was not returned
4861 the case where the table is already loaded. (Lin Ming) BZ 463
4863 Implemented support for the use of DDBHandles as an Indexed Reference, as
4865 the ACPI spec. (Lin Ming) BZ 486
4867 Implemented support for UserTerm (Method invocation) for the Unload
4869 as per the ACPI spec. (Lin Ming) BZ 580
4871 Fixed a problem with the LoadTable operator where the OemId and OemTableId
4872 input strings could cause unexpected failures if they were shorter than
4874 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
4876 Implemented support for UserTerm (Method invocation) for the Unload
4878 as per the ACPI spec. (Lin Ming) BZ 580
4880 Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
4882 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
4884 Example Code and Data Size: These are the sizes for the OS-independent
4885 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4886 debug version of the code includes the debug output trace mechanism and
4888 a much larger code and data size.
4891 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
4892 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
4894 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
4895 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
4897 2) iASL Compiler/Disassembler and Tools:
4899 Implemented support in the disassembler for checksum validation on
4901 binary DSDTs and SSDTs. If incorrect, a message is displayed within the
4903 header dump at the start of the disassembly.
4905 Implemented additional debugging information in the namespace listing file
4906 created during compilation. In addition to the namespace hierarchy, the
4908 pathname to each namespace object is displayed.
4910 Fixed a problem with the disassembler where invalid ACPI tables could
4912 faults or infinite loops.
4914 Fixed an unexpected parse error when using the optional "parameter types"
4915 list in a control method declaration. (Lin Ming) BZ 397
4917 Fixed a problem where two External declarations with the same name did not
4918 cause an error (Lin Ming) BZ 509
4920 Implemented support for full TermArgs (adding Argx, Localx and method
4921 invocation) for the ParameterData parameter to the LoadTable operator.
4925 ----------------------------------------
4926 19 December 2007. Summary of changes for version 20071219:
4928 1) ACPI CA Core Subsystem:
4930 Implemented full support for deferred execution for the TermArg string
4931 arguments for DataTableRegion. This enables forward references and full
4932 operand resolution for the three string arguments. Similar to
4934 deferred argument execution.) Lin Ming. BZ 430
4936 Implemented full argument resolution support for the BankValue argument to
4937 BankField. Previously, only constants were supported, now any TermArg may
4939 used. Lin Ming BZ 387, 393
4941 Fixed a problem with AcpiGetDevices where the search of a branch of the
4942 device tree could be terminated prematurely. In accordance with the ACPI
4943 specification, the search down the current branch is terminated if a
4945 is both not present and not functional (instead of just not present.)
4949 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
4951 the underlying AML code changed the GPE enable registers. Now, any unknown
4952 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
4954 instead of simply ignored. Rui Zhang.
4956 Fixed a problem with Index Fields where the Index register was incorrectly
4957 limited to a maximum of 32 bits. Now any size may be used.
4959 Fixed a couple memory leaks associated with "implicit return" objects when
4960 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
4962 Example Code and Data Size: These are the sizes for the OS-independent
4963 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4964 debug version of the code includes the debug output trace mechanism and
4966 a much larger code and data size.
4969 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
4970 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
4972 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
4973 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
4975 ----------------------------------------
4976 14 November 2007. Summary of changes for version 20071114:
4978 1) ACPI CA Core Subsystem:
4980 Implemented event counters for each of the Fixed Events, the ACPI SCI
4981 (interrupt) itself, and control methods executed. Named
4982 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
4984 should be useful for debugging and statistics.
4986 Implemented a new external interface, AcpiGetStatistics, to retrieve the
4987 contents of the various event counters. Returns the current values for
4988 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
4989 AcpiMethodCount. The interface can be expanded in the future if new
4991 are added. Device drivers should use this interface rather than access the
4994 Fixed a problem with the FromBCD and ToBCD operators. With some compilers,
4995 the ShortDivide function worked incorrectly, causing problems with the BCD
4996 functions with large input values. A truncation from 64-bit to 32-bit
4997 inadvertently occurred. Internal BZ 435. Lin Ming
4999 Fixed a problem with Index references passed as method arguments.
5001 passed as arguments to control methods were dereferenced immediately
5003 control was passed to the called method). The references are now correctly
5004 passed directly to the called method. BZ 5389. Lin Ming
5006 Fixed a problem with CopyObject used in conjunction with the Index
5008 The reference was incorrectly dereferenced before the copy. The reference
5010 now correctly copied. BZ 5391. Lin Ming
5012 Fixed a problem with Control Method references within Package objects.
5014 references are now correctly generated. This completes the package
5015 construction overhaul that began in version 20071019.
5017 Example Code and Data Size: These are the sizes for the OS-independent
5018 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5019 debug version of the code includes the debug output trace mechanism and
5021 a much larger code and data size.
5024 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
5025 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
5027 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
5028 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
5031 2) iASL Compiler/Disassembler and Tools:
5033 The AcpiExec utility now installs handlers for all of the predefined
5034 Operation Region types. New types supported are: PCI_Config, CMOS, and
5037 Fixed a problem with the 64-bit version of AcpiExec where the extended
5039 bit) address fields for the DSDT and FACS within the FADT were not being
5040 used, causing truncation of the upper 32-bits of these addresses. Lin Ming
5043 ----------------------------------------
5044 19 October 2007. Summary of changes for version 20071019:
5046 1) ACPI CA Core Subsystem:
5048 Fixed a problem with the Alias operator when the target of the alias is a
5049 named ASL operator that opens a new scope -- Scope, Device, PowerResource,
5050 Processor, and ThermalZone. In these cases, any children of the original
5051 operator could not be accessed via the alias, potentially causing
5053 AE_NOT_FOUND exceptions. (BZ 9067)
5055 Fixed a problem with the Package operator where all named references were
5056 created as object references and left otherwise unresolved. According to
5058 ACPI specification, a Package can only contain Data Objects or references
5060 control methods. The implication is that named references to Data Objects
5061 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
5062 immediately upon package creation. This is the approach taken with this
5063 change. References to all other named objects (Methods, Devices, Scopes,
5064 etc.) are all now properly created as reference objects. (BZ 5328)
5066 Reverted a change to Notify handling that was introduced in version
5067 20070508. This version changed the Notify handling from asynchronous to
5068 fully synchronous (Device driver Notify handling with respect to the
5070 ASL operator). It was found that this change caused more problems than it
5071 solved and was removed by most users.
5073 Fixed a problem with the Increment and Decrement operators where the type
5075 the target object could be unexpectedly and incorrectly changed. (BZ 353)
5078 Fixed a problem with the Load and LoadTable operators where the table
5079 location within the namespace was ignored. Instead, the table was always
5080 loaded into the root or current scope. Lin Ming.
5082 Fixed a problem with the Load operator when loading a table from a buffer
5083 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
5085 Fixed a problem with the Debug object where a store of a DdbHandle
5087 object to the Debug object could cause a fault.
5089 Added a table checksum verification for the Load operator, in the case
5091 the load is from a buffer. (BZ 578).
5093 Implemented additional parameter validation for the LoadTable operator.
5095 length of the input strings SignatureString, OemIdString, and OemTableId
5097 now checked for maximum lengths. (BZ 582) Lin Ming.
5099 Example Code and Data Size: These are the sizes for the OS-independent
5100 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5101 debug version of the code includes the debug output trace mechanism and
5103 a much larger code and data size.
5106 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
5107 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
5109 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
5110 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
5113 2) iASL Compiler/Disassembler:
5115 Fixed a problem where if a single file was specified and the file did not
5116 exist, no error message was emitted. (Introduced with wildcard support in
5119 ----------------------------------------
5120 19 September 2007. Summary of changes for version 20070919:
5122 1) ACPI CA Core Subsystem:
5124 Designed and implemented new external interfaces to install and remove
5125 handlers for ACPI table-related events. Current events that are defined
5127 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
5128 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
5129 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
5131 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
5132 (acpi_serialized option on Linux) could cause some systems to hang during
5133 initialization. (Bob Moore) BZ 8171
5135 Fixed a problem where objects of certain types (Device, ThermalZone,
5136 Processor, PowerResource) can be not found if they are declared and
5137 referenced from within the same control method (Lin Ming) BZ 341
5139 Example Code and Data Size: These are the sizes for the OS-independent
5140 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5141 debug version of the code includes the debug output trace mechanism and
5143 a much larger code and data size.
5146 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
5147 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
5149 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
5150 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
5153 2) iASL Compiler/Disassembler:
5155 Implemented support to allow multiple files to be compiled/disassembled in
5157 single invocation. This includes command line wildcard support for both
5159 Windows and Unix versions of the compiler. This feature simplifies the
5160 disassembly and compilation of multiple ACPI tables in a single directory.
5162 ----------------------------------------
5163 08 May 2007. Summary of changes for version 20070508:
5165 1) ACPI CA Core Subsystem:
5167 Implemented a Microsoft compatibility design change for the handling of
5169 Notify AML operator. Previously, notify handlers were dispatched and
5170 executed completely asynchronously in a deferred thread. The new design
5171 still executes the notify handlers in a different thread, but the original
5172 thread that executed the Notify() now waits at a synchronization point for
5173 the notify handler to complete. Some machines depend on a synchronous
5175 operator in order to operate correctly.
5177 Implemented support to allow Package objects to be passed as method
5178 arguments to the external AcpiEvaluateObject interface. Previously, this
5179 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
5180 implemented since there were no reserved control methods that required it
5183 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
5185 contained invalid non-zero values in reserved fields could cause later
5186 failures because these fields have meaning in later revisions of the FADT.
5187 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
5189 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
5191 Fixed a problem where the Global Lock handle was not properly updated if a
5192 thread that acquired the Global Lock via executing AML code then attempted
5193 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
5197 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
5198 could be corrupted if the interrupt being removed was at the head of the
5199 list. Reported by Linn Crosetto.
5201 Example Code and Data Size: These are the sizes for the OS-independent
5202 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5203 debug version of the code includes the debug output trace mechanism and
5205 a much larger code and data size.
5208 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
5209 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
5211 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
5212 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
5214 ----------------------------------------
5215 20 March 2007. Summary of changes for version 20070320:
5217 1) ACPI CA Core Subsystem:
5219 Implemented a change to the order of interpretation and evaluation of AML
5220 operand objects within the AML interpreter. The interpreter now evaluates
5221 operands in the order that they appear in the AML stream (and the
5222 corresponding ASL code), instead of in the reverse order (after the entire
5223 operand list has been parsed). The previous behavior caused several subtle
5224 incompatibilities with the Microsoft AML interpreter as well as being
5225 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
5227 Implemented a change to the ACPI Global Lock support. All interfaces to
5229 global lock now allow the same thread to acquire the lock multiple times.
5230 This affects the AcpiAcquireGlobalLock external interface to the global
5232 as well as the internal use of the global lock to support AML fields -- a
5233 control method that is holding the global lock can now simultaneously
5235 AML fields that require global lock protection. Previously, in both cases,
5236 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
5238 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
5239 Controller. There is no change to the behavior of the AML Acquire
5241 as this can already be used to acquire a mutex multiple times by the same
5242 thread. BZ 8066. With assistance from Alexey Starikovskiy.
5244 Fixed a problem where invalid objects could be referenced in the AML
5245 Interpreter after error conditions. During operand evaluation, ensure that
5246 the internal "Return Object" field is cleared on error and only valid
5247 pointers are stored there. Caused occasional access to deleted objects
5249 resulted in "large reference count" warning messages. Valery Podrezov.
5251 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
5253 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
5256 Fixed an internal problem with the handling of result objects on the
5257 interpreter result stack. BZ 7872. Valery Podrezov.
5259 Removed obsolete code that handled the case where AML_NAME_OP is the
5261 of a reference (Reference.Opcode). This code was no longer necessary. BZ
5262 7874. Valery Podrezov.
5264 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This was
5266 remnant from the previously discontinued 16-bit support.
5268 Example Code and Data Size: These are the sizes for the OS-independent
5269 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5270 debug version of the code includes the debug output trace mechanism and
5272 a much larger code and data size.
5275 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
5276 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
5278 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
5279 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
5281 ----------------------------------------
5282 26 January 2007. Summary of changes for version 20070126:
5284 1) ACPI CA Core Subsystem:
5286 Added the 2007 copyright to all module headers and signons. This affects
5287 virtually every file in the ACPICA core subsystem, the iASL compiler, and
5290 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
5291 during a table load. A bad pointer was passed in the case where the DSDT
5293 overridden, causing a fault in this case.
5295 Example Code and Data Size: These are the sizes for the OS-independent
5296 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5297 debug version of the code includes the debug output trace mechanism and
5299 a much larger code and data size.
5302 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
5303 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
5305 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
5306 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
5308 ----------------------------------------
5309 15 December 2006. Summary of changes for version 20061215:
5311 1) ACPI CA Core Subsystem:
5313 Support for 16-bit ACPICA has been completely removed since it is no
5315 necessary and it clutters the code. All 16-bit macros, types, and
5316 conditional compiles have been removed, cleaning up and simplifying the
5318 across the entire subsystem. DOS support is no longer needed since the
5319 bootable Linux firmware kit is now available.
5321 The handler for the Global Lock is now removed during AcpiTerminate to
5322 enable a clean subsystem restart, via the implementation of the
5323 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
5326 Implemented enhancements to the multithreading support within the debugger
5327 to enable improved multithreading debugging and evaluation of the
5331 Debugger: Enhanced the Statistics/Memory command to emit the total
5333 memory used during the execution, as well as the maximum memory consumed
5335 each of the various object types. (Valery Podrezov)
5337 Example Code and Data Size: These are the sizes for the OS-independent
5338 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5339 debug version of the code includes the debug output trace mechanism and
5341 a much larger code and data size.
5344 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
5345 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
5347 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
5348 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
5351 2) iASL Compiler/Disassembler and Tools:
5353 AcpiExec: Implemented a new option (-m) to display full memory use
5354 statistics upon subsystem/program termination. (Valery Podrezov)
5356 ----------------------------------------
5357 09 November 2006. Summary of changes for version 20061109:
5359 1) ACPI CA Core Subsystem:
5361 Optimized the Load ASL operator in the case where the source operand is an
5362 operation region. Simply map the operation region memory, instead of
5363 performing a bytewise read. (Region must be of type SystemMemory, see
5366 Fixed the Load ASL operator for the case where the source operand is a
5367 region field. A buffer object is also allowed as the source operand. BZ
5370 Fixed a problem where the Load ASL operator allowed the source operand to
5372 an operation region of any type. It is now restricted to regions of type
5373 SystemMemory, as per the ACPI specification. BZ 481
5375 Additional cleanup and optimizations for the new Table Manager code.
5377 AcpiEnable will now fail if all of the required ACPI tables are not loaded
5378 (FADT, FACS, DSDT). BZ 477
5380 Added #pragma pack(8/4) to acobject.h to ensure that the structures in
5382 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
5383 manually optimized to be aligned and will not work if it is byte-packed.
5385 Example Code and Data Size: These are the sizes for the OS-independent
5386 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5387 debug version of the code includes the debug output trace mechanism and
5389 a much larger code and data size.
5392 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
5393 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
5395 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
5396 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
5399 2) iASL Compiler/Disassembler and Tools:
5401 Fixed a problem where the presence of the _OSI predefined control method
5402 within complex expressions could cause an internal compiler error.
5404 AcpiExec: Implemented full region support for multiple address spaces.
5405 SpaceId is now part of the REGION object. BZ 429
5407 ----------------------------------------
5408 11 October 2006. Summary of changes for version 20061011:
5410 1) ACPI CA Core Subsystem:
5412 Completed an AML interpreter performance enhancement for control method
5413 execution. Previously a 2-pass parse/execution, control methods are now
5414 completely parsed and executed in a single pass. This improves overall
5415 interpreter performance by ~25%, reduces code size, and reduces CPU stack
5416 use. (Valery Podrezov + interpreter changes in version 20051202 that
5417 eliminated namespace loading during the pass one parse.)
5419 Implemented _CID support for PCI Root Bridge detection. If the _HID does
5421 match the predefined PCI Root Bridge IDs, the _CID list (if present) is
5423 obtained and also checked for an ID match.
5425 Implemented additional support for the PCI _ADR execution: upsearch until
5427 device scope is found before executing _ADR. This allows PCI_Config
5428 operation regions to be declared locally within control methods underneath
5431 Fixed a problem with a possible race condition between threads executing
5432 AcpiWalkNamespace and the AML interpreter. This condition was removed by
5433 modifying AcpiWalkNamespace to (by default) ignore all temporary namespace
5434 entries created during any concurrent control method execution. An
5435 additional namespace race condition is known to exist between
5436 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
5439 Restructured the AML ParseLoop function, breaking it into several
5440 subfunctions in order to reduce CPU stack use and improve maintainability.
5443 AcpiGetHandle: Fix for parameter validation to detect invalid combinations
5444 of prefix handle and pathname. BZ 478
5446 Example Code and Data Size: These are the sizes for the OS-independent
5447 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5448 debug version of the code includes the debug output trace mechanism and
5450 a much larger code and data size.
5453 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
5454 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
5456 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
5457 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
5459 2) iASL Compiler/Disassembler and Tools:
5461 Ported the -g option (get local ACPI tables) to the new ACPICA Table
5463 to restore original behavior.
5465 ----------------------------------------
5466 27 September 2006. Summary of changes for version 20060927:
5468 1) ACPI CA Core Subsystem:
5470 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
5471 These functions now use a spinlock for mutual exclusion and the interrupt
5472 level indication flag is not needed.
5474 Fixed a problem with the Global Lock where the lock could appear to be
5475 obtained before it is actually obtained. The global lock semaphore was
5476 inadvertently created with one unit instead of zero units. (BZ 464) Fiodor
5479 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
5481 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
5483 Example Code and Data Size: These are the sizes for the OS-independent
5484 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5485 debug version of the code includes the debug output trace mechanism and
5487 a much larger code and data size.
5490 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
5491 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
5493 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
5494 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
5497 2) iASL Compiler/Disassembler and Tools:
5499 Fixed a compilation problem with the pre-defined Resource Descriptor field
5500 names where an "object does not exist" error could be incorrectly
5502 if the parent ResourceTemplate pathname places the template within a
5503 different namespace scope than the current scope. (BZ 7212)
5505 Fixed a problem where the compiler could hang after syntax errors detected
5506 in an ElseIf construct. (BZ 453)
5508 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
5509 operator. An incorrect output filename was produced when this parameter
5511 a null string (""). Now, the original input filename is used as the AML
5512 output filename, with an ".aml" extension.
5514 Implemented a generic batch command mode for the AcpiExec utility (execute
5515 any AML debugger command) (Valery Podrezov).
5517 ----------------------------------------
5518 12 September 2006. Summary of changes for version 20060912:
5520 1) ACPI CA Core Subsystem:
5522 Enhanced the implementation of the "serialized mode" of the interpreter
5523 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
5524 specified, instead of creating a serialization semaphore per control
5526 the interpreter lock is simply no longer released before a blocking
5527 operation during control method execution. This effectively makes the AML
5528 Interpreter single-threaded. The overhead of a semaphore per-method is
5531 Fixed a regression where an error was no longer emitted if a control
5533 attempts to create 2 objects of the same name. This once again returns
5534 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
5536 will dynamically serialize the control method to possible prevent future
5539 Integrated a fix for a problem with PCI Express HID detection in the PCI
5540 Config Space setup procedure. (BZ 7145)
5542 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
5543 AcpiHwInitialize function - the FADT registers are now validated when the
5546 Added two new warnings during FADT verification - 1) if the FADT is larger
5547 than the largest known FADT version, and 2) if there is a mismatch between
5549 32-bit block address and the 64-bit X counterpart (when both are non-
5552 Example Code and Data Size: These are the sizes for the OS-independent
5553 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5554 debug version of the code includes the debug output trace mechanism and
5556 a much larger code and data size.
5559 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
5560 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
5562 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
5563 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
5566 2) iASL Compiler/Disassembler and Tools:
5568 Fixed a problem with the implementation of the Switch() operator where the
5569 temporary variable was declared too close to the actual Switch, instead of
5570 at method level. This could cause a problem if the Switch() operator is
5571 within a while loop, causing an error on the second iteration. (BZ 460)
5573 Disassembler - fix for error emitted for unknown type for target of scope
5574 operator. Now, ignore it and continue.
5576 Disassembly of an FADT now verifies the input FADT and reports any errors
5577 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
5579 Disassembly of raw data buffers with byte initialization data now prefixes
5580 each output line with the current buffer offset.
5582 Disassembly of ASF! table now includes all variable-length data fields at
5583 the end of some of the subtables.
5585 The disassembler now emits a comment if a buffer appears to be a
5586 ResourceTemplate, but cannot be disassembled as such because the EndTag
5588 not appear at the very end of the buffer.
5590 AcpiExec - Added the "-t" command line option to enable the serialized
5592 of the AML interpreter.
5594 ----------------------------------------
5595 31 August 2006. Summary of changes for version 20060831:
5597 1) ACPI CA Core Subsystem:
5599 Miscellaneous fixes for the Table Manager:
5600 - Correctly initialize internal common FADT for all 64-bit "X" fields
5601 - Fixed a couple table mapping issues during table load
5602 - Fixed a couple alignment issues for IA64
5603 - Initialize input array to zero in AcpiInitializeTables
5604 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
5607 Change for GPE support: when a "wake" GPE is received, all wake GPEs are
5609 immediately disabled to prevent the waking GPE from firing again and to
5610 prevent other wake GPEs from interrupting the wake process.
5612 Added the AcpiGpeCount global that tracks the number of processed GPEs, to
5613 be used for debugging systems with a large number of ACPI interrupts.
5615 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
5616 both the ACPICA headers and the disassembler.
5618 Example Code and Data Size: These are the sizes for the OS-independent
5619 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5620 debug version of the code includes the debug output trace mechanism and
5622 a much larger code and data size.
5625 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
5626 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
5628 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
5629 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
5632 2) iASL Compiler/Disassembler and Tools:
5634 Disassembler support for the DMAR ACPI table.
5636 ----------------------------------------
5637 23 August 2006. Summary of changes for version 20060823:
5639 1) ACPI CA Core Subsystem:
5641 The Table Manager component has been completely redesigned and
5642 reimplemented. The new design is much simpler, and reduces the overall
5644 and data size of the kernel-resident ACPICA by approximately 5%. Also, it
5646 now possible to obtain the ACPI tables very early during kernel
5647 initialization, even before dynamic memory management is initialized.
5648 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
5650 Obsolete ACPICA interfaces:
5652 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
5655 - AcpiLoadTable: Not needed.
5656 - AcpiUnloadTable: Not needed.
5658 New ACPICA interfaces:
5660 - AcpiInitializeTables: Must be called before the table manager can be
5662 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
5663 allocated memory after it becomes available.
5664 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI tables
5667 Other ACPICA changes:
5669 - AcpiGetTableHeader returns the actual mapped table header, not a copy.
5671 AcpiOsUnmapMemory to free this mapping.
5672 - AcpiGetTable returns the actual mapped table. The mapping is managed
5673 internally and must not be deleted by the caller. Use of this interface
5674 causes no additional dynamic memory allocation.
5675 - AcpiFindRootPointer: Support for physical addressing has been
5677 it appeared to be unused.
5678 - The interface to AcpiOsMapMemory has changed to be consistent with the
5679 other allocation interfaces.
5680 - The interface to AcpiOsGetRootPointer has changed to eliminate
5683 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on 64-
5684 bit platforms. Was previously 64 bits on all platforms.
5685 - The interface to the ACPI Global Lock acquire/release macros have
5687 slightly since ACPICA no longer keeps a local copy of the FACS with a
5688 constructed pointer to the actual global lock.
5690 Porting to the new table manager:
5692 - AcpiInitializeTables: Must be called once, and can be called anytime
5693 during the OS initialization process. It allows the host to specify an
5695 of memory to be used to store the internal version of the RSDT/XSDT (root
5696 table). This allows the host to access ACPI tables before memory
5698 is initialized and running.
5699 - AcpiReallocateRootTable: Can be called after memory management is
5701 to copy the root table to a dynamically allocated array, freeing up the
5702 scratch memory specified in the call to AcpiInitializeTables.
5703 - AcpiSubsystemInitialize: This existing interface is independent of the
5704 Table Manager, and does not have to be called before the Table Manager can
5705 be used, it only must be called before the rest of ACPICA can be used.
5706 - ACPI Tables: Some changes have been made to the names and structure of
5708 actbl.h and actbl1.h header files and may require changes to existing
5710 For example, bitfields have been completely removed because of their lack
5712 portability across C compilers.
5713 - Update interfaces to the Global Lock acquire/release macros if local
5714 versions are used. (see acwin.h)
5716 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
5720 Example Code and Data Size: These are the sizes for the OS-independent
5721 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5722 debug version of the code includes the debug output trace mechanism and
5724 a much larger code and data size.
5727 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
5728 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
5730 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
5731 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
5734 2) iASL Compiler/Disassembler and Tools:
5736 No changes for this release.
5738 ----------------------------------------
5739 21 July 2006. Summary of changes for version 20060721:
5741 1) ACPI CA Core Subsystem:
5743 The full source code for the ASL test suite used to validate the iASL
5744 compiler and the ACPICA core subsystem is being released with the ACPICA
5745 source for the first time. The source is contained in a separate package
5747 consists of over 1100 files that exercise all ASL/AML operators. The
5749 should appear on the Intel/ACPI web site shortly. (Valery Podrezov, Fiodor
5752 Completed a new design and implementation for support of the ACPI Global
5753 Lock. On the OS side, the global lock is now treated as a standard AML
5754 mutex. Previously, multiple OS threads could "acquire" the global lock
5755 simultaneously. However, this could cause the BIOS to be starved out of
5757 lock - especially in cases such as the Embedded Controller driver where
5758 there is a tight coupling between the OS and the BIOS.
5760 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
5761 The Global Lock interrupt handler no longer queues the execution of a
5762 separate thread to signal the global lock semaphore. Instead, the
5764 is signaled directly from the interrupt handler.
5766 Implemented support within the AML interpreter for package objects that
5767 contain a larger AML length (package list length) than the package element
5768 count. In this case, the length of the package is truncated to match the
5769 package element count. Some BIOS code apparently modifies the package
5771 on the fly, and this change supports this behavior. Provides compatibility
5772 with the MS AML interpreter. (With assistance from Fiodor Suietov)
5774 Implemented a temporary fix for the BankValue parameter of a Bank Field to
5775 support all constant values, now including the Zero and One opcodes.
5776 Evaluation of this parameter must eventually be converted to a full
5778 evaluation. A not-implemented error is now returned (temporarily) for non-
5779 constant values for this parameter.
5781 Fixed problem reports (Fiodor Suietov) integrated:
5782 - Fix for premature object deletion after CopyObject on Operation Region
5786 Example Code and Data Size: These are the sizes for the OS-independent
5787 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5788 debug version of the code includes the debug output trace mechanism and
5790 a much larger code and data size.
5793 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
5794 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
5796 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
5797 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
5800 2) iASL Compiler/Disassembler and Tools:
5802 No changes for this release.
5804 ----------------------------------------
5805 07 July 2006. Summary of changes for version 20060707:
5807 1) ACPI CA Core Subsystem:
5809 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
5810 that do not allow the initialization of address pointers within packed
5811 structures - even though the hardware itself may support misaligned
5812 transfers. Some of the debug data structures are packed by default to
5815 Added an error message for the case where AcpiOsGetThreadId() returns
5817 A non-zero value is required by the core ACPICA code to ensure the proper
5818 operation of AML mutexes and recursive control methods.
5820 The DSDT is now the only ACPI table that determines whether the AML
5821 interpreter is in 32-bit or 64-bit mode. Not really a functional change,
5823 the hooks for per-table 32/64 switching have been removed from the code. A
5824 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
5826 Fixed a possible leak of an OwnerID in the error path of
5827 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
5828 deletion to a single place in AcpiTbUninstallTable to correct possible
5830 when using the AcpiTbDeleteTablesByType interface (with assistance from
5833 Fixed a problem with Serialized control methods where the semaphore
5834 associated with the method could be over-signaled after multiple method
5837 Fixed two issues with the locking of the internal namespace data
5839 Both the Unload() operator and AcpiUnloadTable interface now lock the
5840 namespace during the namespace deletion associated with the table unload
5841 (with assistance from Linn Crosetto.)
5843 Fixed problem reports (Valery Podrezov) integrated:
5844 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
5846 Fixed problem reports (Fiodor Suietov) integrated:
5847 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
5848 - On Address Space handler deletion, needless deactivation call (BZ 374)
5849 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375)
5850 - Possible memory leak, Notify sub-objects of Processor, Power,
5853 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
5854 - Minimum Length of RSDT should be validated (BZ 379)
5855 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
5857 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
5861 Example Code and Data Size: These are the sizes for the OS-independent
5862 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5863 debug version of the code includes the debug output trace mechanism and
5865 a much larger code and data size.
5868 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
5869 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
5871 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
5872 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
5875 2) iASL Compiler/Disassembler and Tools:
5877 Fixed problem reports:
5878 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
5881 ----------------------------------------
5882 23 June 2006. Summary of changes for version 20060623:
5884 1) ACPI CA Core Subsystem:
5886 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
5887 allows the type to be customized to the host OS for improved efficiency
5888 (since a spinlock is usually a very small object.)
5890 Implemented support for "ignored" bits in the ACPI registers. According to
5891 the ACPI specification, these bits should be preserved when writing the
5892 registers via a read/modify/write cycle. There are 3 bits preserved in
5894 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
5896 Implemented the initial deployment of new OSL mutex interfaces. Since some
5897 host operating systems have separate mutex and semaphore objects, this
5898 feature was requested. The base code now uses mutexes (and the new mutex
5899 interfaces) wherever a binary semaphore was used previously. However, for
5900 the current release, the mutex interfaces are defined as macros to map
5902 to the existing semaphore interfaces. Therefore, no OSL changes are
5904 at this time. (See acpiosxf.h)
5906 Fixed several problems with the support for the control method SyncLevel
5907 parameter. The SyncLevel now works according to the ACPI specification and
5908 in concert with the Mutex SyncLevel parameter, since the current SyncLevel
5909 is a property of the executing thread. Mutual exclusion for control
5911 is now implemented with a mutex instead of a semaphore.
5913 Fixed three instances of the use of the C shift operator in the bitfield
5914 support code (exfldio.c) to avoid the use of a shift value larger than the
5915 target data width. The behavior of C compilers is undefined in this case
5917 can cause unpredictable results, and therefore the case must be detected
5919 avoided. (Fiodor Suietov)
5921 Added an info message whenever an SSDT or OEM table is loaded dynamically
5922 via the Load() or LoadTable() ASL operators. This should improve debugging
5923 capability since it will show exactly what tables have been loaded (beyond
5924 the tables present in the RSDT/XSDT.)
5926 Example Code and Data Size: These are the sizes for the OS-independent
5927 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5928 debug version of the code includes the debug output trace mechanism and
5930 a much larger code and data size.
5933 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
5934 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
5936 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
5937 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
5940 2) iASL Compiler/Disassembler and Tools:
5942 No changes for this release.
5944 ----------------------------------------
5945 08 June 2006. Summary of changes for version 20060608:
5947 1) ACPI CA Core Subsystem:
5949 Converted the locking mutex used for the ACPI hardware to a spinlock. This
5950 change should eliminate all problems caused by attempting to acquire a
5951 semaphore at interrupt level, and it means that all ACPICA external
5952 interfaces that directly access the ACPI hardware can be safely called
5954 interrupt level. OSL code that implements the semaphore interfaces should
5956 able to eliminate any workarounds for being called at interrupt level.
5958 Fixed a regression introduced in 20060526 where the ACPI device
5959 initialization could be prematurely aborted with an AE_NOT_FOUND if a
5961 did not have an optional _INI method.
5963 Fixed an IndexField issue where a write to the Data Register should be
5964 limited in size to the AccessSize (width) of the IndexField itself. (BZ
5968 Fixed problem reports (Valery Podrezov) integrated:
5969 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
5971 Fixed problem reports (Fiodor Suietov) integrated:
5972 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
5974 Removed four global mutexes that were obsolete and were no longer being
5977 Example Code and Data Size: These are the sizes for the OS-independent
5978 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5979 debug version of the code includes the debug output trace mechanism and
5981 a much larger code and data size.
5984 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
5985 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
5987 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
5988 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
5991 2) iASL Compiler/Disassembler and Tools:
5993 Fixed a fault when using -g option (get tables from registry) on Windows
5996 Fixed problem reports integrated:
5997 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
5998 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
6000 - Global table revision override (-r) is ignored (BZ 413)
6002 ----------------------------------------
6003 26 May 2006. Summary of changes for version 20060526:
6005 1) ACPI CA Core Subsystem:
6007 Restructured, flattened, and simplified the internal interfaces for
6008 namespace object evaluation - resulting in smaller code, less CPU stack
6010 and fewer interfaces. (With assistance from Mikhail Kouzmich)
6012 Fixed a problem with the CopyObject operator where the first parameter was
6013 not typed correctly for the parser, interpreter, compiler, and
6015 Caused various errors and unexpected behavior.
6017 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
6018 produced incorrect results with some C compilers. Since the behavior of C
6019 compilers when the shift value is larger than the datatype width is
6020 apparently not well defined, the interpreter now detects this condition
6022 simply returns zero as expected in all such cases. (BZ 395)
6024 Fixed problem reports (Valery Podrezov) integrated:
6025 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
6026 - Allow interpreter to handle nested method declarations (BZ 5361)
6028 Fixed problem reports (Fiodor Suietov) integrated:
6029 - AcpiTerminate doesn't free debug memory allocation list objects (BZ 355)
6030 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
6032 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
6033 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
6034 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
6035 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
6036 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
6037 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
6038 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
6040 - Status of the Global Initialization Handler call not used (BZ 366)
6041 - Incorrect object parameter to Global Initialization Handler (BZ 367)
6043 Example Code and Data Size: These are the sizes for the OS-independent
6044 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6045 debug version of the code includes the debug output trace mechanism and
6047 a much larger code and data size.
6050 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
6051 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
6053 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
6054 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
6057 2) iASL Compiler/Disassembler and Tools:
6059 Modified the parser to allow the names IO, DMA, and IRQ to be used as
6060 namespace identifiers with no collision with existing resource descriptor
6061 macro names. This provides compatibility with other ASL compilers and is
6062 most useful for disassembly/recompilation of existing tables without parse
6063 errors. (With assistance from Thomas Renninger)
6065 Disassembler: fixed an incorrect disassembly problem with the
6066 DataTableRegion and CopyObject operators. Fixed a possible fault during
6067 disassembly of some Alias operators.
6069 ----------------------------------------
6070 12 May 2006. Summary of changes for version 20060512:
6072 1) ACPI CA Core Subsystem:
6074 Replaced the AcpiOsQueueForExecution interface with a new interface named
6075 AcpiOsExecute. The major difference is that the new interface does not
6077 a Priority parameter, this appeared to be useless and has been replaced by
6079 Type parameter. The Type tells the host what type of execution is being
6080 requested, such as global lock handler, notify handler, GPE handler, etc.
6081 This allows the host to queue and execute the request as appropriate for
6083 request type, possibly using different work queues and different
6085 for the various request types. This enables fixes for multithreading
6086 deadlock problems such as BZ #5534, and will require changes to all
6088 OS interface layers. (Alexey Starikovskiy and Bob Moore)
6090 Fixed a possible memory leak associated with the support for the so-called
6091 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
6094 Fixed a problem with the Load() operator where a table load from an
6095 operation region could overwrite an internal table buffer by up to 7 bytes
6096 and cause alignment faults on IPF systems. (With assistance from Luming
6099 Example Code and Data Size: These are the sizes for the OS-independent
6100 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6101 debug version of the code includes the debug output trace mechanism and
6103 a much larger code and data size.
6106 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
6107 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
6109 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
6110 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
6114 2) iASL Compiler/Disassembler and Tools:
6116 Disassembler: Implemented support to cross reference the internal
6118 and automatically generate ASL External() statements for symbols not
6120 within the current table being disassembled. This will simplify the
6121 disassembly and recompilation of interdependent tables such as SSDTs since
6122 these statements will no longer have to be added manually.
6124 Disassembler: Implemented experimental support to automatically detect
6125 invocations of external control methods and generate appropriate
6127 statements. This is problematic because the AML cannot be correctly parsed
6128 until the number of arguments for each control method is known. Currently,
6129 standalone method invocations and invocations as the source operand of a
6130 Store() statement are supported.
6132 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
6133 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
6134 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
6135 more readable and likely closer to the original ASL source.
6137 ----------------------------------------
6138 21 April 2006. Summary of changes for version 20060421:
6140 1) ACPI CA Core Subsystem:
6142 Removed a device initialization optimization introduced in 20051216 where
6143 the _STA method was not run unless an _INI was also present for the same
6144 device. This optimization could cause problems because it could allow _INI
6145 methods to be run within a not-present device subtree. (If a not-present
6146 device had no _INI, _STA would not be run, the not-present status would
6148 be discovered, and the children of the device would be incorrectly
6151 Implemented a new _STA optimization where namespace subtrees that do not
6152 contain _INI are identified and ignored during device initialization.
6153 Selectively running _STA can significantly improve boot time on large
6154 machines (with assistance from Len Brown.)
6156 Implemented support for the device initialization case where the returned
6157 _STA flags indicate a device not-present but functioning. In this case,
6159 is not run, but the device children are examined for presence, as per the
6162 Implemented an additional change to the IndexField support in order to
6163 conform to MS behavior. The value written to the Index Register is not
6164 simply a byte offset, it is a byte offset in units of the access width of
6165 the parent Index Field. (Fiodor Suietov)
6167 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
6168 interface is called during the creation of all AML operation regions, and
6169 allows the host OS to exert control over what addresses it will allow the
6170 AML code to access. Operation Regions whose addresses are disallowed will
6171 cause a runtime exception when they are actually accessed (will not affect
6172 or abort table loading.) See oswinxf or osunixxf for an example
6175 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
6176 interface allows the host OS to match the various "optional"
6177 interface/behavior strings for the _OSI predefined control method as
6178 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
6179 for an example implementation.
6181 Restructured and corrected various problems in the exception handling code
6182 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
6183 (with assistance from Takayoshi Kochi.)
6185 Modified the Linux source converter to ignore quoted string literals while
6186 converting identifiers from mixed to lower case. This will correct
6188 with the disassembler and other areas where such strings must not be
6191 The ACPI_FUNCTION_* macros no longer require quotes around the function
6192 name. This allows the Linux source converter to convert the names, now
6194 the converter ignores quoted strings.
6196 Example Code and Data Size: These are the sizes for the OS-independent
6197 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6198 debug version of the code includes the debug output trace mechanism and
6200 a much larger code and data size.
6204 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
6205 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
6207 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
6208 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
6211 2) iASL Compiler/Disassembler and Tools:
6213 Implemented 3 new warnings for iASL, and implemented multiple warning
6217 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
6219 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
6220 check for the possible timeout, a warning is issued.
6222 2) Useless operators: If an ASL operator does not specify an optional
6224 operand and it also does not use the function return value from the
6225 operator, a warning is issued since the operator effectively does nothing.
6227 3) Unreferenced objects: If a namespace object is created, but never
6228 referenced, a warning is issued. This is a warning level 2 since there are
6229 cases where this is ok, such as when a secondary table is loaded that uses
6230 the unreferenced objects. Even so, care is taken to only flag objects that
6231 don't look like they will ever be used. For example, the reserved methods
6232 (starting with an underscore) are usually not referenced because it is
6233 expected that the OS will invoke them.
6235 ----------------------------------------
6236 31 March 2006. Summary of changes for version 20060331:
6238 1) ACPI CA Core Subsystem:
6240 Implemented header file support for the following additional ACPI tables:
6241 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
6243 all current and known ACPI tables are now defined in the ACPICA headers
6245 are available for use by device drivers and other software.
6247 Implemented support to allow tables that contain ACPI names with invalid
6248 characters to be loaded. Previously, this would cause the table load to
6249 fail, but since there are several known cases of such tables on existing
6250 machines, this change was made to enable ACPI support for them. Also, this
6251 matches the behavior of the Microsoft ACPI implementation.
6253 Fixed a couple regressions introduced during the memory optimization in
6255 20060317 release. The namespace node definition required additional
6256 reorganization and an internal datatype that had been changed to 8-bit was
6257 restored to 32-bit. (Valery Podrezov)
6259 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
6260 could be passed through to AcpiOsReleaseObject which is unexpected. Such
6261 null pointers are now trapped and ignored, matching the behavior of the
6262 previous implementation before the deployment of AcpiOsReleaseObject.
6263 (Valery Podrezov, Fiodor Suietov)
6265 Fixed a memory mapping leak during the deletion of a SystemMemory
6267 region where a cached memory mapping was not deleted. This became a
6268 noticeable problem for operation regions that are defined within
6270 used control methods. (Dana Meyers)
6272 Reorganized the ACPI table header files into two main files: one for the
6273 ACPI tables consumed by the ACPICA core, and another for the miscellaneous
6274 ACPI tables that are consumed by the drivers and other software. The
6276 FADT definitions were merged into one common section and three different
6277 tables (ACPI 1.0, 1.0+, and 2.0)
6279 Example Code and Data Size: These are the sizes for the OS-independent
6280 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6281 debug version of the code includes the debug output trace mechanism and
6283 a much larger code and data size.
6286 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
6287 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
6289 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
6290 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
6293 2) iASL Compiler/Disassembler and Tools:
6295 Disassembler: Implemented support to decode and format all non-AML ACPI
6296 tables (tables other than DSDTs and SSDTs.) This includes the new tables
6297 added to the ACPICA headers, therefore all current and known ACPI tables
6301 Disassembler: The change to allow ACPI names with invalid characters also
6302 enables the disassembly of such tables. Invalid characters within names
6304 changed to '*' to make the name printable; the iASL compiler will still
6305 generate an error for such names, however, since this is an invalid ACPI
6308 Implemented an option for AcpiXtract (-a) to extract all tables found in
6310 input file. The default invocation extracts only the DSDTs and SSDTs.
6312 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
6313 makefile for the AcpiXtract utility.
6315 ----------------------------------------
6316 17 March 2006. Summary of changes for version 20060317:
6318 1) ACPI CA Core Subsystem:
6320 Implemented the use of a cache object for all internal namespace nodes.
6321 Since there are about 1000 static nodes in a typical system, this will
6322 decrease memory use for cache implementations that minimize per-allocation
6323 overhead (such as a slab allocator.)
6325 Removed the reference count mechanism for internal namespace nodes, since
6327 was deemed unnecessary. This reduces the size of each namespace node by
6328 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit case,
6329 and 32 bytes for the 64-bit case.
6331 Optimized several internal data structures to reduce object size on 64-bit
6332 platforms by packing data within the 64-bit alignment. This includes the
6333 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
6334 instances corresponding to the namespace objects.
6336 Added two new strings for the predefined _OSI method: "Windows 2001.1 SP1"
6339 Split the allocation tracking mechanism out to a separate file, from
6340 utalloc.c to uttrack.c. This mechanism appears to be only useful for
6341 application-level code. Kernels may wish to not include uttrack.c in
6344 Removed all remnants of the obsolete ACPI_REPORT_* macros and the
6346 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
6349 Code and Data Size: These are the sizes for the acpica.lib produced by the
6350 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
6352 driver or OSPM code. The debug version of the code includes the debug
6354 trace mechanism and has a much larger code and data size. Note that these
6355 values will vary depending on the efficiency of the compiler and the
6356 compiler options used during generation.
6359 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
6360 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
6362 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
6363 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
6366 2) iASL Compiler/Disassembler and Tools:
6368 Implemented an ANSI C version of the acpixtract utility. This version will
6369 automatically extract the DSDT and all SSDTs from the input acpidump text
6370 file and dump the binary output to separate files. It can also display a
6371 summary of the input file including the headers for each table found and
6372 will extract any single ACPI table, with any signature. (See
6373 source/tools/acpixtract)
6375 ----------------------------------------
6376 10 March 2006. Summary of changes for version 20060310:
6378 1) ACPI CA Core Subsystem:
6380 Tagged all external interfaces to the subsystem with the new
6381 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to assist
6382 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
6383 macro. The default definition is NULL.
6385 Added the ACPI_THREAD_ID type for the return value from AcpiOsGetThreadId.
6386 This allows the host to define this as necessary to simplify kernel
6387 integration. The default definition is ACPI_NATIVE_UINT.
6389 Fixed two interpreter problems related to error processing, the deletion
6391 objects, and placing invalid pointers onto the internal operator result
6392 stack. BZ 6028, 6151 (Valery Podrezov)
6394 Increased the reference count threshold where a warning is emitted for
6396 reference counts in order to eliminate unnecessary warnings on systems
6398 large namespaces (especially 64-bit.) Increased the value from 0x400 to
6401 Due to universal disagreement as to the meaning of the 'c' in the calloc()
6402 function, the ACPI_MEM_CALLOCATE macro has been renamed to
6403 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
6404 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
6407 Code and Data Size: These are the sizes for the acpica.lib produced by the
6408 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
6410 driver or OSPM code. The debug version of the code includes the debug
6412 trace mechanism and has a much larger code and data size. Note that these
6413 values will vary depending on the efficiency of the compiler and the
6414 compiler options used during generation.
6417 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
6418 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
6420 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
6421 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
6424 2) iASL Compiler/Disassembler:
6426 Disassembler: implemented support for symbolic resource descriptor
6427 references. If a CreateXxxxField operator references a fixed offset within
6429 resource descriptor, a name is assigned to the descriptor and the offset
6431 translated to the appropriate resource tag and pathname. The addition of
6432 this support brings the disassembled code very close to the original ASL
6433 source code and helps eliminate run-time errors when the disassembled code
6434 is modified (and recompiled) in such a way as to invalidate the original
6437 Implemented support for a Descriptor Name as the last parameter to the ASL
6438 Register() macro. This parameter was inadvertently left out of the ACPI
6439 specification, and will be added for ACPI 3.0b.
6441 Fixed a problem where the use of the "_OSI" string (versus the full path
6442 "\_OSI") caused an internal compiler error. ("No back ptr to op")
6444 Fixed a problem with the error message that occurs when an invalid string
6446 used for a _HID object (such as one with an embedded asterisk:
6448 The correct message is now displayed.
6450 ----------------------------------------
6451 17 February 2006. Summary of changes for version 20060217:
6453 1) ACPI CA Core Subsystem:
6455 Implemented a change to the IndexField support to match the behavior of
6457 Microsoft AML interpreter. The value written to the Index register is now
6459 byte offset, no longer an index based upon the width of the Data register.
6460 This should fix IndexField problems seen on some machines where the Data
6461 register is not exactly one byte wide. The ACPI specification will be
6462 clarified on this point.
6464 Fixed a problem where several resource descriptor types could overrun the
6465 internal descriptor buffer due to size miscalculation: VendorShort,
6466 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
6467 affect all platforms.
6469 Fixed a problem where individual resource descriptors were misaligned
6471 the internal buffer, causing alignment faults on IA64 platforms.
6473 Code and Data Size: These are the sizes for the acpica.lib produced by the
6474 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
6476 driver or OSPM code. The debug version of the code includes the debug
6478 trace mechanism and has a much larger code and data size. Note that these
6479 values will vary depending on the efficiency of the compiler and the
6480 compiler options used during generation.
6483 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
6484 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
6486 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
6487 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
6490 2) iASL Compiler/Disassembler:
6492 Implemented support for new reserved names: _WDG and _WED are Microsoft
6493 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
6494 defined method (Throttling Depth Limit.)
6496 Fixed a problem where a zero-length VendorShort or VendorLong resource
6497 descriptor was incorrectly emitted as a descriptor of length one.
6499 ----------------------------------------
6500 10 February 2006. Summary of changes for version 20060210:
6502 1) ACPI CA Core Subsystem:
6504 Removed a couple of extraneous ACPI_ERROR messages that appeared during
6505 normal execution. These became apparent after the conversion from
6508 Fixed a problem where the CreateField operator could hang if the BitIndex
6510 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
6512 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
6513 failed with an exception. This also fixes a couple of related RefOf and
6514 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
6516 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
6518 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
6522 Implemented a memory cleanup at the end of the execution of each iteration
6523 of an AML While() loop, preventing the accumulation of outstanding
6525 (Valery Podrezov, BZ 5427)
6527 Eliminated a chunk of duplicate code in the object resolution code.
6531 Fixed several warnings during the 64-bit code generation.
6533 The AcpiSrc source code conversion tool now inserts one line of whitespace
6534 after an if() statement that is followed immediately by a comment,
6536 readability of the Linux code.
6538 Code and Data Size: The current and previous library sizes for the core
6539 subsystem are shown below. These are the code and data sizes for the
6540 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
6541 values do not include any ACPI driver or OSPM code. The debug version of
6543 code includes the debug output trace mechanism and has a much larger code
6544 and data size. Note that these values will vary depending on the
6546 of the compiler and the compiler options used during generation.
6549 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
6550 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
6552 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
6553 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
6556 2) iASL Compiler/Disassembler:
6558 Fixed a problem with the disassembly of a BankField operator with a
6560 expression for the BankValue parameter.
6562 ----------------------------------------
6563 27 January 2006. Summary of changes for version 20060127:
6565 1) ACPI CA Core Subsystem:
6567 Implemented support in the Resource Manager to allow unresolved namestring
6568 references within resource package objects for the _PRT method. This
6570 is in addition to the previously implemented unresolved reference support
6571 within the AML parser. If the interpreter slack mode is enabled, these
6572 unresolved references will be passed through to the caller as a NULL
6576 Implemented and deployed new macros and functions for error and warning
6577 messages across the subsystem. These macros are simpler and generate less
6578 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
6579 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
6580 macros remain defined to allow ACPI drivers time to migrate to the new
6583 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of the
6584 Acquire/Release Lock OSL interfaces.
6586 Fixed a problem where Alias ASL operators are sometimes not correctly
6587 resolved, in both the interpreter and the iASL compiler.
6589 Fixed several problems with the implementation of the
6590 ConcatenateResTemplate
6591 ASL operator. As per the ACPI specification, zero length buffers are now
6592 treated as a single EndTag. One-length buffers always cause a fatal
6593 exception. Non-zero length buffers that do not end with a full 2-byte
6595 cause a fatal exception.
6597 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
6598 interface. (With assistance from Thomas Renninger)
6600 Code and Data Size: The current and previous library sizes for the core
6601 subsystem are shown below. These are the code and data sizes for the
6602 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
6603 values do not include any ACPI driver or OSPM code. The debug version of
6605 code includes the debug output trace mechanism and has a much larger code
6606 and data size. Note that these values will vary depending on the
6608 of the compiler and the compiler options used during generation.
6611 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
6612 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
6614 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
6615 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
6618 2) iASL Compiler/Disassembler:
6620 Fixed an internal error that was generated for any forward references to
6624 ----------------------------------------
6625 13 January 2006. Summary of changes for version 20060113:
6627 1) ACPI CA Core Subsystem:
6629 Added 2006 copyright to all module headers and signons. This affects
6630 virtually every file in the ACPICA core subsystem, iASL compiler, and the
6633 Enhanced the ACPICA error reporting in order to simplify user migration to
6634 the non-debug version of ACPICA. Replaced all instances of the
6635 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN debug
6636 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
6637 respectively. This preserves all error and warning messages in the non-
6639 version of the ACPICA code (this has been referred to as the "debug lite"
6640 option.) Over 200 cases were converted to create a total of over 380
6641 error/warning messages across the ACPICA code. This increases the code and
6642 data size of the default non-debug version of the code somewhat (about
6644 but all error/warning reporting may be disabled if desired (and code
6645 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
6646 configuration option. The size of the debug version of ACPICA remains
6650 Fixed a memory leak within the AML Debugger "Set" command. One object was
6651 not properly deleted for every successful invocation of the command.
6653 Code and Data Size: The current and previous library sizes for the core
6654 subsystem are shown below. These are the code and data sizes for the
6655 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
6656 values do not include any ACPI driver or OSPM code. The debug version of
6658 code includes the debug output trace mechanism and has a much larger code
6659 and data size. Note that these values will vary depending on the
6661 of the compiler and the compiler options used during generation.
6664 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
6665 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
6667 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
6668 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
6671 2) iASL Compiler/Disassembler:
6673 The compiler now officially supports the ACPI 3.0a specification that was
6674 released on December 30, 2005. (Specification is available at
6677 ----------------------------------------
6678 16 December 2005. Summary of changes for version 20051216:
6680 1) ACPI CA Core Subsystem:
6682 Implemented optional support to allow unresolved names within ASL Package
6683 objects. A null object is inserted in the package when a named reference
6684 cannot be located in the current namespace. Enabled via the interpreter
6685 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on machines
6686 that contain such code.
6688 Implemented an optimization to the initialization sequence that can
6690 boot time. During ACPI device initialization, the _STA method is now run
6692 and only if the _INI method exists. The _STA method is used to determine
6694 the device is present; An _INI can only be run if _STA returns present,
6696 it is a waste of time to run the _STA method if the _INI does not exist.
6697 (Prototype and assistance from Dong Wei)
6699 Implemented use of the C99 uintptr_t for the pointer casting macros if it
6701 available in the current compiler. Otherwise, the default (void *) cast is
6704 Fixed some possible memory leaks found within the execution path of the
6705 Break, Continue, If, and CreateField operators. (Valery Podrezov)
6707 Fixed a problem introduced in the 20051202 release where an exception is
6708 generated during method execution if a control method attempts to declare
6711 Moved resource descriptor string constants that are used by both the AML
6712 disassembler and AML debugger to the common utilities directory so that
6713 these components are independent.
6715 Implemented support in the AcpiExec utility (-e switch) to globally ignore
6716 exceptions during control method execution (method is not aborted.)
6718 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
6721 Code and Data Size: The current and previous library sizes for the core
6722 subsystem are shown below. These are the code and data sizes for the
6723 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
6724 values do not include any ACPI driver or OSPM code. The debug version of
6726 code includes the debug output trace mechanism and has a much larger code
6727 and data size. Note that these values will vary depending on the
6729 of the compiler and the compiler options used during generation.
6732 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
6733 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
6735 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
6736 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
6739 2) iASL Compiler/Disassembler:
6741 Fixed a problem where a CPU stack overflow fault could occur if a
6743 method call was made from within a Return statement.
6745 ----------------------------------------
6746 02 December 2005. Summary of changes for version 20051202:
6748 1) ACPI CA Core Subsystem:
6750 Modified the parsing of control methods to no longer create namespace
6751 objects during the first pass of the parse. Objects are now created only
6752 during the execute phase, at the moment the namespace creation operator is
6753 encountered in the AML (Name, OperationRegion, CreateByteField, etc.) This
6754 should eliminate ALREADY_EXISTS exceptions seen on some machines where
6755 reentrant control methods are protected by an AML mutex. The mutex will
6757 correctly block multiple threads from attempting to create the same object
6760 Increased the number of available Owner Ids for namespace object tracking
6761 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
6763 some machines with a large number of ACPI tables (either static or
6766 Fixed a problem with the AcpiExec utility where a fault could occur when
6768 -b switch (batch mode) is used.
6770 Enhanced the namespace dump routine to output the owner ID for each
6773 Code and Data Size: The current and previous library sizes for the core
6774 subsystem are shown below. These are the code and data sizes for the
6775 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
6776 values do not include any ACPI driver or OSPM code. The debug version of
6778 code includes the debug output trace mechanism and has a much larger code
6779 and data size. Note that these values will vary depending on the
6781 of the compiler and the compiler options used during generation.
6784 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
6785 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
6787 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
6788 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
6791 2) iASL Compiler/Disassembler:
6793 Fixed a parse error during compilation of certain Switch/Case constructs.
6795 simplify the parse, the grammar now allows for multiple Default statements
6796 and this error is now detected and flagged during the analysis phase.
6798 Disassembler: The disassembly now includes the contents of the original
6799 table header within a comment at the start of the file. This includes the
6800 name and version of the original ASL compiler.
6802 ----------------------------------------
6803 17 November 2005. Summary of changes for version 20051117:
6805 1) ACPI CA Core Subsystem:
6807 Fixed a problem in the AML parser where the method thread count could be
6808 decremented below zero if any errors occurred during the method parse
6810 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
6812 This also fixed a related regression with the mechanism that detects and
6813 corrects methods that cannot properly handle reentrancy (related to the
6814 deployment of the new OwnerId mechanism.)
6816 Eliminated the pre-parsing of control methods (to detect errors) during
6817 table load. Related to the problem above, this was causing unwind issues
6819 any errors occurred during the parse, and it seemed to be overkill. A
6821 load should not be aborted if there are problems with any single control
6822 method, thus rendering this feature rather pointless.
6824 Fixed a problem with the new table-driven resource manager where an
6826 buffer overflow could occur for small resource templates.
6828 Implemented a new external interface, AcpiGetVendorResource. This
6830 will find and return a vendor-defined resource descriptor within a _CRS or
6831 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
6834 Removed the length limit (200) on string objects as per the upcoming ACPI
6835 3.0A specification. This affects the following areas of the interpreter:
6837 any implicit conversion of a Buffer to a String, 2) a String object result
6838 of the ASL Concatentate operator, 3) the String object result of the ASL
6841 Fixed a problem in the Windows OS interface layer (OSL) where a
6843 on a semaphore object would incorrectly timeout. This allows the
6844 multithreading features of the AcpiExec utility to work properly under
6847 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
6848 the recently added file named "utresrc.c".
6850 Code and Data Size: The current and previous library sizes for the core
6851 subsystem are shown below. These are the code and data sizes for the
6852 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
6853 values do not include any ACPI driver or OSPM code. The debug version of
6855 code includes the debug output trace mechanism and has a much larger code
6856 and data size. Note that these values will vary depending on the
6858 of the compiler and the compiler options used during generation.
6861 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
6862 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
6864 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
6865 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
6868 2) iASL Compiler/Disassembler:
6870 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
6871 specification. For the iASL compiler, this means that string literals
6873 the source ASL can be of any length.
6875 Enhanced the listing output to dump the AML code for resource descriptors
6876 immediately after the ASL code for each descriptor, instead of in a block
6878 the end of the entire resource template.
6880 Enhanced the compiler debug output to dump the entire original parse tree
6881 constructed during the parse phase, before any transforms are applied to
6883 tree. The transformed tree is dumped also.
6885 ----------------------------------------
6886 02 November 2005. Summary of changes for version 20051102:
6888 1) ACPI CA Core Subsystem:
6890 Modified the subsystem initialization sequence to improve GPE support. The
6891 GPE initialization has been split into two parts in order to defer
6893 of the _PRW methods (Power Resources for Wake) until after the hardware is
6894 fully initialized and the SCI handler is installed. This allows the _PRW
6895 methods to access fields protected by the Global Lock. This will fix
6897 where a NO_GLOBAL_LOCK exception has been seen during initialization.
6899 Converted the ACPI internal object disassemble and display code within the
6900 AML debugger to fully table-driven operation, reducing code size and
6901 increasing maintainability.
6903 Fixed a regression with the ConcatenateResTemplate() ASL operator
6905 in the 20051021 release.
6907 Implemented support for "local" internal ACPI object types within the
6908 debugger "Object" command and the AcpiWalkNamespace external interfaces.
6909 These local types include RegionFields, BankFields, IndexFields, Alias,
6913 Moved common AML resource handling code into a new file, "utresrc.c". This
6914 code is shared by both the Resource Manager and the AML Debugger.
6916 Code and Data Size: The current and previous library sizes for the core
6917 subsystem are shown below. These are the code and data sizes for the
6918 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
6919 values do not include any ACPI driver or OSPM code. The debug version of
6921 code includes the debug output trace mechanism and has a much larger code
6922 and data size. Note that these values will vary depending on the
6924 of the compiler and the compiler options used during generation.
6927 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
6928 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
6930 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
6931 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
6934 2) iASL Compiler/Disassembler:
6936 Fixed a problem with very large initializer lists (more than 4000
6938 for both Buffer and Package objects where the parse stack could overflow.
6940 Enhanced the pre-compile source code scan for non-ASCII characters to
6942 characters within comment fields. The scan is now always performed and is
6944 longer optional, detecting invalid characters within a source file
6945 immediately rather than during the parse phase or later.
6947 Enhanced the ASL grammar definition to force early reductions on all list-
6948 style grammar elements so that the overall parse stack usage is greatly
6949 reduced. This should improve performance and reduce the possibility of
6953 Eliminated all reduce/reduce conflicts in the iASL parser generation.
6955 with the addition of a %expected statement, the compiler generates from
6956 source with no warnings.
6958 Fixed a possible segment fault in the disassembler if the input filename
6959 does not contain a "dot" extension (Thomas Renninger).
6961 ----------------------------------------
6962 21 October 2005. Summary of changes for version 20051021:
6964 1) ACPI CA Core Subsystem:
6966 Implemented support for the EM64T and other x86-64 processors. This
6967 essentially entails recognizing that these processors support non-aligned
6968 memory transfers. Previously, all 64-bit processors were assumed to lack
6969 hardware support for non-aligned transfers.
6971 Completed conversion of the Resource Manager to nearly full table-driven
6972 operation. Specifically, the resource conversion code (convert AML to
6973 internal format and the reverse) and the debug code to dump internal
6974 resource descriptors are fully table-driven, reducing code and data size
6976 improving maintainability.
6978 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag word
6979 on 64-bit processors instead of a fixed 32-bit word. (With assistance from
6980 Alexey Starikovskiy)
6982 Implemented support within the resource conversion code for the Type-
6983 Specific byte within the various ACPI 3.0 *WordSpace macros.
6985 Fixed some issues within the resource conversion code for the type-
6987 flags for both Memory and I/O address resource descriptors. For Memory,
6988 implemented support for the MTP and TTP flags. For I/O, split the TRS and
6989 TTP flags into two separate fields.
6991 Code and Data Size: The current and previous library sizes for the core
6992 subsystem are shown below. These are the code and data sizes for the
6993 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
6994 values do not include any ACPI driver or OSPM code. The debug version of
6996 code includes the debug output trace mechanism and has a much larger code
6997 and data size. Note that these values will vary depending on the
6999 of the compiler and the compiler options used during generation.
7002 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
7003 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
7005 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
7006 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
7010 2) iASL Compiler/Disassembler:
7012 Relaxed a compiler restriction that disallowed a ResourceIndex byte if the
7013 corresponding ResourceSource string was not also present in a resource
7014 descriptor declaration. This restriction caused problems with existing
7015 AML/ASL code that includes the Index byte without the string. When such
7017 was disassembled, it could not be compiled without modification. Further,
7018 the modified code created a resource template with a different size than
7020 original, breaking code that used fixed offsets into the resource template
7023 Removed a recent feature of the disassembler to ignore a lone
7025 byte. This byte is now emitted if present so that the exact AML can be
7026 reproduced when the disassembled code is recompiled.
7028 Improved comments and text alignment for the resource descriptor code
7029 emitted by the disassembler.
7031 Implemented disassembler support for the ACPI 3.0 AccessSize field within
7033 Register() resource descriptor.
7035 ----------------------------------------
7036 30 September 2005. Summary of changes for version 20050930:
7038 1) ACPI CA Core Subsystem:
7040 Completed a major overhaul of the Resource Manager code - specifically,
7041 optimizations in the area of the AML/internal resource conversion code.
7043 code has been optimized to simplify and eliminate duplicated code, CPU
7045 use has been decreased by optimizing function parameters and local
7046 variables, and naming conventions across the manager have been
7048 for clarity and ease of maintenance (this includes function, parameter,
7049 variable, and struct/typedef names.) The update may force changes in some
7050 driver code, depending on how resources are handled by the host OS.
7052 All Resource Manager dispatch and information tables have been moved to a
7053 single location for clarity and ease of maintenance. One new file was
7054 created, named "rsinfo.c".
7056 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
7057 guarantee that the argument is not evaluated twice, making them less prone
7058 to macro side-effects. However, since there exists the possibility of
7059 additional stack use if a particular compiler cannot optimize them (such
7061 in the debug generation case), the original macros are optionally
7063 Note that some invocations of the return_VALUE macro may now cause size
7064 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
7066 eliminate these. (From Randy Dunlap)
7068 Implemented a new mechanism to enable debug tracing for individual control
7069 methods. A new external interface, AcpiDebugTrace, is provided to enable
7070 this mechanism. The intent is to allow the host OS to easily enable and
7071 disable tracing for problematic control methods. This interface can be
7072 easily exposed to a user or debugger interface if desired. See the file
7073 psxface.c for details.
7075 AcpiUtCallocate will now return a valid pointer if a length of zero is
7076 specified - a length of one is used and a warning is issued. This matches
7077 the behavior of AcpiUtAllocate.
7079 Code and Data Size: The current and previous library sizes for the core
7080 subsystem are shown below. These are the code and data sizes for the
7081 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
7082 values do not include any ACPI driver or OSPM code. The debug version of
7084 code includes the debug output trace mechanism and has a much larger code
7085 and data size. Note that these values will vary depending on the
7087 of the compiler and the compiler options used during generation.
7090 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
7091 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
7093 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
7094 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
7097 2) iASL Compiler/Disassembler:
7099 A remark is issued if the effective compile-time length of a package or
7100 buffer is zero. Previously, this was a warning.
7102 ----------------------------------------
7103 16 September 2005. Summary of changes for version 20050916:
7105 1) ACPI CA Core Subsystem:
7107 Fixed a problem within the Resource Manager where support for the Generic
7108 Register descriptor was not fully implemented. This descriptor is now
7110 recognized, parsed, disassembled, and displayed.
7112 Completely restructured the Resource Manager code to utilize table-driven
7113 dispatch and lookup, eliminating many of the large switch() statements.
7115 reduces overall subsystem code size and code complexity. Affects the
7116 resource parsing and construction, disassembly, and debug dump output.
7118 Cleaned up and restructured the debug dump output for all resource
7119 descriptors. Improved readability of the output and reduced code size.
7121 Fixed a problem where changes to internal data structures caused the
7122 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
7124 Code and Data Size: The current and previous library sizes for the core
7125 subsystem are shown below. These are the code and data sizes for the
7126 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
7127 values do not include any ACPI driver or OSPM code. The debug version of
7129 code includes the debug output trace mechanism and has a much larger code
7130 and data size. Note that these values will vary depending on the
7132 of the compiler and the compiler options used during generation.
7135 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
7136 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
7138 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
7139 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
7142 2) iASL Compiler/Disassembler:
7144 Updated the disassembler to automatically insert an EndDependentFn() macro
7145 into the ASL stream if this macro is missing in the original AML code,
7146 simplifying compilation of the resulting ASL module.
7148 Fixed a problem in the disassembler where a disassembled ResourceSource
7149 string (within a large resource descriptor) was not surrounded by quotes
7151 not followed by a comma, causing errors when the resulting ASL module was
7152 compiled. Also, escape sequences within a ResourceSource string are now
7153 handled correctly (especially "\\")
7155 ----------------------------------------
7156 02 September 2005. Summary of changes for version 20050902:
7158 1) ACPI CA Core Subsystem:
7160 Fixed a problem with the internal Owner ID allocation and deallocation
7161 mechanisms for control method execution and recursive method invocation.
7162 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
7163 messages seen on some systems. Recursive method invocation depth is
7164 currently limited to 255. (Alexey Starikovskiy)
7166 Completely eliminated all vestiges of support for the "module-level
7167 executable code" until this support is fully implemented and debugged.
7169 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
7170 some systems that invoke this support.
7172 Fixed a problem within the resource manager code where the transaction
7174 for a 64-bit address descriptor were handled incorrectly in the type-
7177 Consolidated duplicate code within the address descriptor resource manager
7178 code, reducing overall subsystem code size.
7180 Fixed a fault when using the AML debugger "disassemble" command to
7181 disassemble individual control methods.
7183 Removed references to the "release_current" directory within the Unix
7186 Code and Data Size: The current and previous core subsystem library sizes
7187 are shown below. These are the code and data sizes for the acpica.lib
7188 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
7189 include any ACPI driver or OSPM code. The debug version of the code
7191 the debug output trace mechanism and has a much larger code and data size.
7192 Note that these values will vary depending on the efficiency of the
7194 and the compiler options used during generation.
7197 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
7198 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
7200 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
7201 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
7204 2) iASL Compiler/Disassembler:
7206 Implemented an error check for illegal duplicate values in the interrupt
7208 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
7211 Implemented error checking for the Irq() and IrqNoFlags() macros to detect
7212 too many values in the interrupt list (16 max) and invalid values in the
7215 The maximum length string literal within an ASL file is now restricted to
7216 200 characters as per the ACPI specification.
7218 Fixed a fault when using the -ln option (generate namespace listing).
7220 Implemented an error check to determine if a DescriptorName within a
7221 resource descriptor has already been used within the current scope.
7223 ----------------------------------------
7224 15 August 2005. Summary of changes for version 20050815:
7226 1) ACPI CA Core Subsystem:
7228 Implemented a full bytewise compare to determine if a table load request
7230 attempting to load a duplicate table. The compare is performed if the
7232 signatures and table lengths match. This will allow different tables with
7233 the same OEM Table ID and revision to be loaded - probably against the
7235 specification, but discovered in the field nonetheless.
7237 Added the changes.txt logfile to each of the zipped release packages.
7239 Code and Data Size: Current and previous core subsystem library sizes are
7240 shown below. These are the code and data sizes for the acpica.lib produced
7241 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7242 any ACPI driver or OSPM code. The debug version of the code includes the
7243 debug output trace mechanism and has a much larger code and data size.
7245 that these values will vary depending on the efficiency of the compiler
7247 the compiler options used during generation.
7250 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
7251 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
7253 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
7254 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
7257 2) iASL Compiler/Disassembler:
7259 Fixed a problem where incorrect AML code could be generated for Package
7260 objects if optimization is disabled (via the -oa switch).
7262 Fixed a problem with where incorrect AML code is generated for variable-
7263 length packages when the package length is not specified and the number of
7264 initializer values is greater than 255.
7267 ----------------------------------------
7268 29 July 2005. Summary of changes for version 20050729:
7270 1) ACPI CA Core Subsystem:
7272 Implemented support to ignore an attempt to install/load a particular ACPI
7273 table more than once. Apparently there exists BIOS code that repeatedly
7274 attempts to load the same SSDT upon certain events. With assistance from
7275 Venkatesh Pallipadi.
7277 Restructured the main interface to the AML parser in order to correctly
7278 handle all exceptional conditions. This will prevent leakage of the
7280 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
7282 machines. With assistance from Alexey Starikovskiy.
7284 Support for "module level code" has been disabled in this version due to a
7285 number of issues that have appeared on various machines. The support can
7287 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
7288 compilation. When the issues are fully resolved, the code will be enabled
7292 Modified the internal functions for debug print support to define the
7293 FunctionName parameter as a (const char *) for compatibility with compiler
7294 built-in macros such as __FUNCTION__, etc.
7296 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
7298 Implemented support to display an object count summary for the AML
7300 commands Object and Methods.
7302 Code and Data Size: Current and previous core subsystem library sizes are
7303 shown below. These are the code and data sizes for the acpica.lib produced
7304 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7305 any ACPI driver or OSPM code. The debug version of the code includes the
7306 debug output trace mechanism and has a much larger code and data size.
7308 that these values will vary depending on the efficiency of the compiler
7310 the compiler options used during generation.
7313 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
7314 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
7316 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
7317 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
7320 2) iASL Compiler/Disassembler:
7322 Fixed a regression that appeared in the 20050708 version of the compiler
7323 where an error message was inadvertently emitted for invocations of the
7325 reserved control method.
7327 ----------------------------------------
7328 08 July 2005. Summary of changes for version 20050708:
7330 1) ACPI CA Core Subsystem:
7332 The use of the CPU stack in the debug version of the subsystem has been
7333 considerably reduced. Previously, a debug structure was declared in every
7334 function that used the debug macros. This structure has been removed in
7335 favor of declaring the individual elements as parameters to the debug
7336 functions. This reduces the cumulative stack use during nested execution
7338 ACPI function calls at the cost of a small increase in the code size of
7340 debug version of the subsystem. With assistance from Alexey Starikovskiy
7344 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
7345 headers to define a macro that will return the current function name at
7346 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
7348 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
7349 compiler-dependent header, the function name is saved on the CPU stack
7351 pointer per function.) This mechanism is used because apparently there
7352 exists no standard ANSI-C defined macro that that returns the function
7355 Redesigned and reimplemented the "Owner ID" mechanism used to track
7356 namespace objects created/deleted by ACPI tables and control method
7357 execution. A bitmap is now used to allocate and free the IDs, thus solving
7358 the wraparound problem present in the previous implementation. The size of
7359 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
7362 Removed the UINT32_BIT and UINT16_BIT types that were used for the
7364 flag definitions within the headers for the predefined ACPI tables. These
7365 have been replaced by UINT8_BIT in order to increase the code portability
7367 the subsystem. If the use of UINT8 remains a problem, we may be forced to
7368 eliminate bitfields entirely because of a lack of portability.
7370 Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
7372 is a frequently used function and this improvement increases the
7374 of the entire subsystem (Alexey Starikovskiy).
7376 Fixed several possible memory leaks and the inverse - premature object
7377 deletion (Alexey Starikovskiy).
7379 Code and Data Size: Current and previous core subsystem library sizes are
7380 shown below. These are the code and data sizes for the acpica.lib produced
7381 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7382 any ACPI driver or OSPM code. The debug version of the code includes the
7383 debug output trace mechanism and has a much larger code and data size.
7385 that these values will vary depending on the efficiency of the compiler
7387 the compiler options used during generation.
7390 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
7391 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
7393 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
7394 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
7396 ----------------------------------------
7397 24 June 2005. Summary of changes for version 20050624:
7399 1) ACPI CA Core Subsystem:
7401 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
7402 the host-defined cache object. This allows the OSL implementation to
7404 and type this object in any manner desired, simplifying the OSL
7405 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
7406 Linux, and should be defined in the OS-specific header file for other
7407 operating systems as required.
7409 Changed the interface to AcpiOsAcquireObject to directly return the
7410 requested object as the function return (instead of ACPI_STATUS.) This
7411 change was made for performance reasons, since this is the purpose of the
7412 interface in the first place. AcpiOsAcquireObject is now similar to the
7413 AcpiOsAllocate interface.
7415 Implemented a new AML debugger command named Businfo. This command
7417 information about all devices that have an associate _PRT object. The
7419 _HID, _UID, and _CID are displayed for these devices.
7421 Modified the initialization sequence in AcpiInitializeSubsystem to call
7423 OSL interface AcpiOslInitialize first, before any local initialization.
7425 change was required because the global initialization now calls OSL
7428 Enhanced the Dump command to display the entire contents of Package
7430 (including all sub-objects and their values.)
7432 Restructured the code base to split some files because of size and/or
7433 because the code logically belonged in a separate file. New files are
7435 below. All makefiles and project files included in the ACPI CA release
7438 utilities/utcache.c /* Local cache interfaces */
7439 utilities/utmutex.c /* Local mutex support */
7440 utilities/utstate.c /* State object support */
7441 interpreter/parser/psloop.c /* Main AML parse loop */
7443 Code and Data Size: Current and previous core subsystem library sizes are
7444 shown below. These are the code and data sizes for the acpica.lib produced
7445 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7446 any ACPI driver or OSPM code. The debug version of the code includes the
7447 debug output trace mechanism and has a much larger code and data size.
7449 that these values will vary depending on the efficiency of the compiler
7451 the compiler options used during generation.
7454 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
7455 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
7457 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
7458 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
7461 2) iASL Compiler/Disassembler:
7463 Fixed a regression introduced in version 20050513 where the use of a
7465 object within a Case() statement caused a compile time exception. The
7466 original behavior has been restored (a Match() operator is emitted.)
7468 ----------------------------------------
7469 17 June 2005. Summary of changes for version 20050617:
7471 1) ACPI CA Core Subsystem:
7473 Moved the object cache operations into the OS interface layer (OSL) to
7475 the host OS to handle these operations if desired (for example, the Linux
7476 OSL will invoke the slab allocator). This support is optional; the compile
7477 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache
7478 code in the ACPI CA core. The new OSL interfaces are shown below. See
7479 utalloc.c for an example implementation, and acpiosxf.h for the exact
7480 interface definitions. With assistance from Alexey Starikovskiy.
7487 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
7489 and restore a flags parameter. This fits better with many OS lock models.
7490 Note: the current execution state (interrupt handler or not) is no longer
7491 passed to these interfaces. If necessary, the OSL must determine this
7493 by itself, a simple and fast operation. With assistance from Alexey
7496 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
7497 present if the revision of the RSDP was 2 or greater. According to the
7499 specification, the XSDT is optional in all cases, and the table manager
7500 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
7501 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain
7504 Fixed an interpreter problem with the Mid() operator in the case of an
7506 string where the resulting output string is of zero length. It now
7508 returns a valid, null terminated string object instead of a string object
7509 with a null pointer.
7511 Fixed a problem with the control method argument handling to allow a store
7512 to an Arg object that already contains an object of type Device. The
7514 object is now correctly overwritten. Previously, an error was returned.
7517 Enhanced the debugger Find command to emit object values in addition to
7519 found object pathnames. The output format is the same as the dump
7523 Enhanced the debugger Set command. It now has the ability to set the value
7524 of any Named integer object in the namespace (Previously, only method
7526 and args could be set.)
7528 Code and Data Size: Current and previous core subsystem library sizes are
7529 shown below. These are the code and data sizes for the acpica.lib produced
7530 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7531 any ACPI driver or OSPM code. The debug version of the code includes the
7532 debug output trace mechanism and has a much larger code and data size.
7534 that these values will vary depending on the efficiency of the compiler
7536 the compiler options used during generation.
7539 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
7540 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
7542 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
7543 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
7546 2) iASL Compiler/Disassembler:
7548 Fixed a regression in the disassembler where if/else/while constructs were
7549 output incorrectly. This problem was introduced in the previous release
7550 (20050526). This problem also affected the single-step disassembly in the
7553 Fixed a problem where compiling the reserved _OSI method would randomly
7555 rarely) produce compile errors.
7557 Enhanced the disassembler to emit compilable code in the face of incorrect
7558 AML resource descriptors. If the optional ResourceSourceIndex is present,
7559 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
7560 disassembly. Otherwise, the resulting code cannot be compiled without
7563 ----------------------------------------
7564 26 May 2005. Summary of changes for version 20050526:
7566 1) ACPI CA Core Subsystem:
7568 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
7569 the module level (not within a control method.) These opcodes are executed
7570 exactly once at the time the table is loaded. This type of code was legal
7572 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
7574 order to provide backwards compatibility with earlier BIOS
7576 This eliminates the "Encountered executable code at module level" warning
7577 that was previously generated upon detection of such code.
7579 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
7580 inadvertently be generated during the lookup of namespace objects in the
7581 second pass parse of ACPI tables and control methods. It appears that this
7582 problem could occur during the resolution of forward references to
7586 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
7587 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
7588 allows the deadlock detection debug code to be compiled out in the normal
7589 case, improving mutex performance (and overall subsystem performance)
7592 Implemented a handful of miscellaneous fixes for possible memory leaks on
7593 error conditions and error handling control paths. These fixes were
7594 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
7596 Added a check for a null RSDT pointer in AcpiGetFirmwareTable (tbxfroot.c)
7597 to prevent a fault in this error case.
7599 Code and Data Size: Current and previous core subsystem library sizes are
7600 shown below. These are the code and data sizes for the acpica.lib produced
7601 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7602 any ACPI driver or OSPM code. The debug version of the code includes the
7603 debug output trace mechanism and has a much larger code and data size.
7605 that these values will vary depending on the efficiency of the compiler
7607 the compiler options used during generation.
7610 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
7611 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
7613 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
7614 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
7617 2) iASL Compiler/Disassembler:
7619 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
7620 the module level (not within a control method.) These operators will be
7621 executed once at the time the table is loaded. This type of code was legal
7622 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
7623 compiler in order to provide backwards compatibility with earlier BIOS ASL
7626 The ACPI integer width (specified via the table revision ID or the -r
7627 override, 32 or 64 bits) is now used internally during compile-time
7629 folding to ensure that constants are truncated to 32 bits if necessary.
7630 Previously, the revision ID value was only emitted in the AML table
7633 An error message is now generated for the Mutex and Method operators if
7635 SyncLevel parameter is outside the legal range of 0 through 15.
7637 Fixed a problem with the Method operator ParameterTypes list handling
7639 3.0). Previously, more than 2 types or 2 arguments generated a syntax
7641 The actual underlying implementation of method argument typechecking is
7642 still under development, however.
7644 ----------------------------------------
7645 13 May 2005. Summary of changes for version 20050513:
7647 1) ACPI CA Core Subsystem:
7649 Implemented support for PCI Express root bridges -- added support for
7651 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
7653 The interpreter now automatically truncates incoming 64-bit constants to
7655 bits if currently executing out of a 32-bit ACPI table (Revision < 2).
7657 also affects the iASL compiler constant folding. (Note: as per below, the
7658 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
7660 Fixed a problem where string and buffer objects with "static" pointers
7661 (pointers to initialization data within an ACPI table) were not handled
7662 consistently. The internal object copy operation now always copies the
7664 to a newly allocated buffer, regardless of whether the source object is
7667 Fixed a problem with the FromBCD operator where an implicit result
7668 conversion was improperly performed while storing the result to the target
7669 operand. Since this is an "explicit conversion" operator, the implicit
7670 conversion should never be performed on the output.
7672 Fixed a problem with the CopyObject operator where a copy to an existing
7673 named object did not always completely overwrite the existing object
7675 at name. Specifically, a buffer-to-buffer copy did not delete the existing
7678 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces and
7679 structs for consistency.
7681 Code and Data Size: Current and previous core subsystem library sizes are
7682 shown below. These are the code and data sizes for the acpica.lib produced
7683 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7684 any ACPI driver or OSPM code. The debug version of the code includes the
7685 debug output trace mechanism and has a much larger code and data size.
7687 that these values will vary depending on the efficiency of the compiler
7689 the compiler options used during generation.
7692 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
7693 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
7694 Current Release: (Same sizes)
7695 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
7696 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
7699 2) iASL Compiler/Disassembler:
7701 The compiler now emits a warning if an attempt is made to generate a 64-
7703 integer constant from within a 32-bit ACPI table (Revision < 2). The
7705 is truncated to 32 bits.
7707 Fixed a problem with large package objects: if the static length of the
7708 package is greater than 255, the "variable length package" opcode is
7709 emitted. Previously, this caused an error. This requires an update to the
7710 ACPI spec, since it currently (incorrectly) states that packages larger
7712 255 elements are not allowed.
7714 The disassembler now correctly handles variable length packages and
7716 larger than 255 elements.
7718 ----------------------------------------
7719 08 April 2005. Summary of changes for version 20050408:
7721 1) ACPI CA Core Subsystem:
7723 Fixed three cases in the interpreter where an "index" argument to an ASL
7724 function was still (internally) 32 bits instead of the required 64 bits.
7725 This was the Index argument to the Index, Mid, and Match operators.
7727 The "strupr" function is now permanently local (AcpiUtStrupr), since this
7729 not a POSIX-defined function and not present in most kernel-level C
7730 libraries. All references to the C library strupr function have been
7734 Completed the deployment of static functions/prototypes. All prototypes
7736 the static attribute have been moved from the headers to the owning C
7739 Implemented an extract option (-e) for the AcpiBin utility (AML binary
7740 utility). This option allows the utility to extract individual ACPI tables
7741 from the output of AcpiDmp. It provides the same functionality of the
7742 acpixtract.pl perl script without the worry of setting the correct perl
7743 options. AcpiBin runs on Windows and has not yet been generated/validated
7745 the Linux/Unix environment (but should be soon).
7747 Updated and fixed the table dump option for AcpiBin (-d). This option
7748 converts a single ACPI table to a hex/ascii file, similar to the output of
7751 Code and Data Size: Current and previous core subsystem library sizes are
7752 shown below. These are the code and data sizes for the acpica.lib produced
7753 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7754 any ACPI driver or OSPM code. The debug version of the code includes the
7755 debug output trace mechanism and has a much larger code and data size.
7757 that these values will vary depending on the efficiency of the compiler
7759 the compiler options used during generation.
7762 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
7763 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
7765 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
7766 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
7769 2) iASL Compiler/Disassembler:
7771 Disassembler fix: Added a check to ensure that the table length found in
7773 ACPI table header within the input file is not longer than the actual
7775 file size. This indicates some kind of file or table corruption.
7777 ----------------------------------------
7778 29 March 2005. Summary of changes for version 20050329:
7780 1) ACPI CA Core Subsystem:
7782 An error is now generated if an attempt is made to create a Buffer Field
7784 length zero (A CreateField with a length operand of zero.)
7786 The interpreter now issues a warning whenever executable code at the
7788 level is detected during ACPI table load. This will give some idea of the
7789 prevalence of this type of code.
7791 Implemented support for references to named objects (other than control
7792 methods) within package objects.
7794 Enhanced package object output for the debug object. Package objects are
7796 completely dumped, showing all elements.
7798 Enhanced miscellaneous object output for the debug object. Any object can
7799 now be written to the debug object (for example, a device object can be
7800 written, and the type of the object will be displayed.)
7802 The "static" qualifier has been added to all local functions across both
7804 core subsystem and the iASL compiler.
7806 The number of "long" lines (> 80 chars) within the source has been
7807 significantly reduced, by about 1/3.
7809 Cleaned up all header files to ensure that all CA/iASL functions are
7810 prototyped (even static functions) and the formatting is consistent.
7812 Two new header files have been added, acopcode.h and acnames.h.
7814 Removed several obsolete functions that were no longer used.
7816 Code and Data Size: Current and previous core subsystem library sizes are
7817 shown below. These are the code and data sizes for the acpica.lib produced
7818 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7819 any ACPI driver or OSPM code. The debug version of the code includes the
7820 debug output trace mechanism and has a much larger code and data size.
7822 that these values will vary depending on the efficiency of the compiler
7824 the compiler options used during generation.
7827 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
7828 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
7830 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
7831 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
7835 2) iASL Compiler/Disassembler:
7837 Fixed a problem with the resource descriptor generation/support. For the
7838 ResourceSourceIndex and the ResourceSource fields, both must be present,
7840 both must be not present - can't have one without the other.
7842 The compiler now returns non-zero from the main procedure if any errors
7844 occurred during the compilation.
7847 ----------------------------------------
7848 09 March 2005. Summary of changes for version 20050309:
7850 1) ACPI CA Core Subsystem:
7852 The string-to-buffer implicit conversion code has been modified again
7854 a change to the ACPI specification. In order to match the behavior of the
7855 other major ACPI implementation, the target buffer is no longer truncated
7857 the source string is smaller than an existing target buffer. This change
7858 requires an update to the ACPI spec, and should eliminate the recent
7859 AE_AML_BUFFER_LIMIT issues.
7861 The "implicit return" support was rewritten to a new algorithm that solves
7862 the general case. Rather than attempt to determine when a method is about
7864 exit, the result of every ASL operator is saved momentarily until the very
7865 next ASL operator is executed. Therefore, no matter how the method exits,
7866 there will always be a saved implicit return value. This feature is only
7867 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should eliminate
7868 AE_AML_NO_RETURN_VALUE errors when enabled.
7870 Implemented implicit conversion support for the predicate (operand) of the
7871 If, Else, and While operators. String and Buffer arguments are
7873 converted to Integers.
7875 Changed the string-to-integer conversion behavior to match the new ACPI
7876 errata: "If no integer object exists, a new integer is created. The ASCII
7877 string is interpreted as a hexadecimal constant. Each string character is
7878 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
7879 with the first character as the most significant digit, and ending with
7881 first non-hexadecimal character or end-of-string." This means that the
7883 non-hex character terminates the conversion and this is the code that was
7886 Fixed a problem where the ObjectType operator would fail (fault) when used
7887 on an Index of a Package which pointed to a null package element. The
7888 operator now properly returns zero (Uninitialized) in this case.
7890 Fixed a problem where the While operator used excessive memory by not
7891 properly popping the result stack during execution. There was no memory
7893 after execution, however. (Code provided by Valery Podrezov.)
7895 Fixed a problem where references to control methods within Package objects
7896 caused the method to be invoked, instead of producing a reference object
7897 pointing to the method.
7899 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree) to
7900 improve performance and reduce code size. (Code provided by Alexey
7903 Code and Data Size: Current and previous core subsystem library sizes are
7904 shown below. These are the code and data sizes for the acpica.lib produced
7905 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
7906 any ACPI driver or OSPM code. The debug version of the code includes the
7907 debug output trace mechanism and has a much larger code and data size.
7909 that these values will vary depending on the efficiency of the compiler
7911 the compiler options used during generation.
7914 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
7915 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
7917 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
7918 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
7921 2) iASL Compiler/Disassembler:
7923 Fixed a problem with the Return operator with no arguments. Since the AML
7924 grammar for the byte encoding requires an operand for the Return opcode,
7926 compiler now emits a Return(Zero) for this case. An ACPI specification
7927 update has been written for this case.
7929 For tables other than the DSDT, namepath optimization is automatically
7930 disabled. This is because SSDTs can be loaded anywhere in the namespace,
7932 compiler has no knowledge of where, and thus cannot optimize namepaths.
7934 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
7935 inadvertently omitted from the ACPI specification, and will require an
7938 The source file scan for ASCII characters is now optional (-a). This
7940 was made because some vendors place non-ascii characters within comments.
7941 However, the scan is simply a brute-force byte compare to ensure all
7942 characters in the file are in the range 0x00 to 0x7F.
7944 Fixed a problem with the CondRefOf operator where the compiler was
7945 inappropriately checking for the existence of the target. Since the point
7947 the operator is to check for the existence of the target at run-time, the
7948 compiler no longer checks for the target existence.
7950 Fixed a problem where errors generated from the internal AML interpreter
7951 during constant folding were not handled properly, causing a fault.
7953 Fixed a problem with overly aggressive range checking for the Stall
7954 operator. The valid range (max 255) is now only checked if the operand is
7956 type Integer. All other operand types cannot be statically checked.
7958 Fixed a problem where control method references within the RefOf, DeRefOf,
7959 and ObjectType operators were not treated properly. They are now treated
7961 actual references, not method invocations.
7963 Fixed and enhanced the "list namespace" option (-ln). This option was
7965 a number of releases ago.
7967 Improved error handling for the Field, IndexField, and BankField
7969 The compiler now cleanly reports and recovers from errors in the field
7970 component (FieldUnit) list.
7972 Fixed a disassembler problem where the optional ResourceDescriptor fields
7973 TRS and TTP were not always handled correctly.
7975 Disassembler - Comments in output now use "//" instead of "/*"
7977 ----------------------------------------
7978 28 February 2005. Summary of changes for version 20050228:
7980 1) ACPI CA Core Subsystem:
7982 Fixed a problem where the result of an Index() operator (an object
7983 reference) must increment the reference count on the target object for the
7984 life of the object reference.
7986 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
7987 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
7989 resource descriptors.
7991 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
7992 Space Descriptor" string, indicating interpreter support for the
7996 Implemented header support for the new ACPI 3.0 FADT flag bits.
7998 Implemented header support for the new ACPI 3.0 PCI Express bits for the
8000 status/enable registers.
8002 Updated header support for the MADT processor local Apic struct and MADT
8003 platform interrupt source struct for new ACPI 3.0 fields.
8005 Implemented header support for the SRAT and SLIT ACPI tables.
8007 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
8011 Code and Data Size: Current and previous core subsystem library sizes are
8012 shown below. These are the code and data sizes for the acpica.lib produced
8013 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8014 any ACPI driver or OSPM code. The debug version of the code includes the
8015 debug output trace mechanism and has a much larger code and data size.
8017 that these values will vary depending on the efficiency of the compiler
8019 the compiler options used during generation.
8022 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
8023 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
8025 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
8026 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
8029 2) iASL Compiler/Disassembler:
8031 Fixed a problem with the internal 64-bit String-to-integer conversion with
8032 strings less than two characters long.
8034 Fixed a problem with constant folding where the result of the Index()
8035 operator can not be considered a constant. This means that Index() cannot
8037 a type3 opcode and this will require an update to the ACPI specification.
8039 Disassembler: Implemented support for the TTP, MTP, and TRS resource
8040 descriptor fields. These fields were inadvertently ignored and not output
8042 the disassembly of the resource descriptor.
8045 ----------------------------------------
8046 11 February 2005. Summary of changes for version 20050211:
8048 1) ACPI CA Core Subsystem:
8050 Implemented ACPI 3.0 support for implicit conversion within the Match()
8051 operator. MatchObjects can now be of type integer, buffer, or string
8053 of just type integer. Package elements are implicitly converted to the
8055 of the MatchObject. This change aligns the behavior of Match() with the
8056 behavior of the other logical operators (LLess(), etc.) It also requires
8058 errata change to the ACPI specification as this support was intended for
8059 ACPI 3.0, but was inadvertently omitted.
8061 Fixed a problem with the internal implicit "to buffer" conversion. Strings
8062 that are converted to buffers will cause buffer truncation if the string
8064 smaller than the target buffer. Integers that are converted to buffers
8066 not cause buffer truncation, only zero extension (both as per the ACPI
8067 spec.) The problem was introduced when code was added to truncate the
8068 buffer, but this should not be performed in all cases, only the string
8071 Fixed a problem with the Buffer and Package operators where the
8073 would get confused if two such operators were used as operands to an ASL
8074 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
8075 stack was not being popped after the execution of these operators,
8077 in an AE_NO_RETURN_VALUE exception.
8079 Fixed a problem with constructs of the form Store(Index(...),...). The
8080 reference object returned from Index was inadvertently resolved to an
8082 value. This problem was introduced in version 20050114 when the behavior
8084 Store() was modified to restrict the object types that can be used as the
8085 source operand (to match the ACPI specification.)
8087 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
8089 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
8091 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
8093 Code and Data Size: Current and previous core subsystem library sizes are
8094 shown below. These are the code and data sizes for the acpica.lib produced
8095 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8096 any ACPI driver or OSPM code. The debug version of the code includes the
8097 debug output trace mechanism and has a much larger code and data size.
8099 that these values will vary depending on the efficiency of the compiler
8101 the compiler options used during generation.
8104 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
8105 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
8107 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
8108 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
8111 2) iASL Compiler/Disassembler:
8113 Fixed a code generation problem in the constant folding optimization code
8114 where incorrect code was generated if a constant was reduced to a buffer
8115 object (i.e., a reduced type 5 opcode.)
8117 Fixed a typechecking problem for the ToBuffer operator. Caused by an
8118 incorrect return type in the internal opcode information table.
8120 ----------------------------------------
8121 25 January 2005. Summary of changes for version 20050125:
8123 1) ACPI CA Core Subsystem:
8125 Fixed a recently introduced problem with the Global Lock where the
8126 underlying semaphore was not created. This problem was introduced in
8127 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
8128 Acquire() operation on _GL.
8130 The local object cache is now optional, and is disabled by default. Both
8131 AcpiExec and the iASL compiler enable the cache because they run in user
8132 mode and this enhances their performance. #define ACPI_ENABLE_OBJECT_CACHE
8133 to enable the local cache.
8135 Fixed an issue in the internal function AcpiUtEvaluateObject concerning
8137 optional "implicit return" support where an error was returned if no
8139 object was expected, but one was implicitly returned. AE_OK is now
8141 in this case and the implicitly returned object is deleted.
8142 AcpiUtEvaluateObject is only occasionally used, and only to execute
8144 methods such as _STA and _INI where the return type is known up front.
8146 Fixed a few issues with the internal convert-to-integer code. It now
8148 an error if an attempt is made to convert a null string, a string of only
8149 blanks/tabs, or a zero-length buffer. This affects both implicit
8151 and explicit conversion via the ToInteger() operator.
8153 The internal debug code in AcpiUtAcquireMutex has been commented out. It
8155 not needed for normal operation and should increase the performance of the
8156 entire subsystem. The code remains in case it is needed for debug purposes
8159 The AcpiExec source and makefile are included in the Unix/Linux package
8163 Code and Data Size: Current and previous core subsystem library sizes are
8164 shown below. These are the code and data sizes for the acpica.lib produced
8165 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8166 any ACPI driver or OSPM code. The debug version of the code includes the
8167 debug output trace mechanism and has a much larger code and data size.
8169 that these values will vary depending on the efficiency of the compiler
8171 the compiler options used during generation.
8174 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
8175 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
8177 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
8178 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
8180 2) iASL Compiler/Disassembler:
8182 Switch/Case support: A warning is now issued if the type of the Switch
8184 cannot be determined at compile time. For example, Switch(Arg0) will
8185 generate the warning, and the type is assumed to be an integer. As per the
8186 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
8190 Switch/Case support: Implemented support for buffer and string objects as
8191 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
8192 buffers and strings.
8194 Switch/Case support: The emitted code for the LEqual() comparisons now
8196 the switch value as the first operand, not the second. The case value is
8198 the second operand, and this allows the case value to be implicitly
8199 converted to the type of the switch value, not the other way around.
8201 Switch/Case support: Temporary variables are now emitted immediately
8203 the control method, not at the global level. This means that there are now
8204 36 temps available per-method, not 36 temps per-module as was the case
8206 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
8208 ----------------------------------------
8209 14 January 2005. Summary of changes for version 20050114:
8211 Added 2005 copyright to all module headers. This affects every module in
8212 the core subsystem, iASL compiler, and the utilities.
8214 1) ACPI CA Core Subsystem:
8216 Fixed an issue with the String-to-Buffer conversion code where the string
8217 null terminator was not included in the buffer after conversion, but there
8218 is existing ASL that assumes the string null terminator is included. This
8220 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
8221 introduced in the previous version when the code was updated to correctly
8222 set the converted buffer size as per the ACPI specification. The ACPI spec
8223 is ambiguous and will be updated to specify that the null terminator must
8225 included in the converted buffer. This also affects the ToBuffer() ASL
8228 Fixed a problem with the Mid() ASL/AML operator where it did not work
8229 correctly on Buffer objects. Newly created sub-buffers were not being
8234 Fixed a problem in AcpiTbFindTable where incorrect string compares were
8235 performed on the OemId and OemTableId table header fields. These fields
8237 not null terminated, so strncmp is now used instead of strcmp.
8239 Implemented a restriction on the Store() ASL/AML operator to align the
8240 behavior with the ACPI specification. Previously, any object could be
8242 as the source operand. Now, the only objects that may be used are
8244 Buffers, Strings, Packages, Object References, and DDB Handles. If
8245 necessary, the original behavior can be restored by enabling the
8246 EnableInterpreterSlack flag.
8248 Enhanced the optional "implicit return" support to allow an implicit
8250 value from methods that are invoked externally via the AcpiEvaluateObject
8251 interface. This enables implicit returns from the _STA and _INI methods,
8254 Changed the Revision() ASL/AML operator to return the current version of
8256 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
8258 the supported ACPI version (This is the function of the _REV method).
8260 Updated the _REV predefined method to return the currently supported
8264 Implemented batch mode option for the AcpiExec utility (-b).
8266 Code and Data Size: Current and previous core subsystem library sizes are
8267 shown below. These are the code and data sizes for the acpica.lib produced
8268 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8269 any ACPI driver or OSPM code. The debug version of the code includes the
8270 debug output trace mechanism and has a much larger code and data size.
8272 that these values will vary depending on the efficiency of the compiler
8274 the compiler options used during generation.
8277 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
8278 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
8280 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
8281 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
8283 ----------------------------------------
8284 10 December 2004. Summary of changes for version 20041210:
8286 ACPI 3.0 support is nearing completion in both the iASL compiler and the
8287 ACPI CA core subsystem.
8289 1) ACPI CA Core Subsystem:
8291 Fixed a problem in the ToDecimalString operator where the resulting string
8292 length was incorrectly calculated. The length is now calculated exactly,
8293 eliminating incorrect AE_STRING_LIMIT exceptions.
8295 Fixed a problem in the ToHexString operator to allow a maximum 200
8297 string to be produced.
8299 Fixed a problem in the internal string-to-buffer and buffer-to-buffer copy
8300 routine where the length of the resulting buffer was not truncated to the
8301 new size (if the target buffer already existed).
8303 Code and Data Size: Current and previous core subsystem library sizes are
8304 shown below. These are the code and data sizes for the acpica.lib produced
8305 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8306 any ACPI driver or OSPM code. The debug version of the code includes the
8307 debug output trace mechanism and has a much larger code and data size.
8309 that these values will vary depending on the efficiency of the compiler
8311 the compiler options used during generation.
8314 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
8315 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
8317 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
8318 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
8321 2) iASL Compiler/Disassembler:
8323 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
8324 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
8325 Includes support in the disassembler.
8327 Implemented support for the new (ACPI 3.0) parameter to the Register
8331 Fixed a problem where the _HE resource name for the Interrupt macro was
8332 referencing bit 0 instead of bit 1.
8334 Implemented check for maximum 255 interrupts in the Interrupt macro.
8336 Fixed a problem with the predefined resource descriptor names where
8337 incorrect AML code was generated if the offset within the resource buffer
8338 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
8339 but did not update the surrounding package lengths.
8341 Changes to the Dma macro: All channels within the channel list must be in
8342 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
8343 optional (default is BusMaster).
8345 Implemented check for maximum 7 data bytes for the VendorShort macro.
8347 The ReadWrite parameter is now optional for the Memory32 and similar
8350 ----------------------------------------
8351 03 December 2004. Summary of changes for version 20041203:
8353 1) ACPI CA Core Subsystem:
8355 The low-level field insertion/extraction code (exfldio) has been
8357 rewritten to eliminate unnecessary complexity, bugs, and boundary
8360 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
8362 operators where the input operand could be inadvertently deleted if no
8363 conversion was necessary (e.g., if the input to ToInteger was an Integer
8366 Fixed a problem with the ToDecimalString and ToHexString where an
8368 exception code was returned if the resulting string would be > 200 chars.
8369 AE_STRING_LIMIT is now returned.
8371 Fixed a problem with the Concatenate operator where AE_OK was always
8372 returned, even if the operation failed.
8374 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
8375 semaphores to be allocated.
8377 Code and Data Size: Current and previous core subsystem library sizes are
8378 shown below. These are the code and data sizes for the acpica.lib produced
8379 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8380 any ACPI driver or OSPM code. The debug version of the code includes the
8381 debug output trace mechanism and has a much larger code and data size.
8383 that these values will vary depending on the efficiency of the compiler
8385 the compiler options used during generation.
8388 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
8389 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
8391 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
8392 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
8395 2) iASL Compiler/Disassembler:
8397 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
8398 recently introduced in 20041119.
8400 Fixed a problem with the ToUUID macro where the upper nybble of each
8402 byte was inadvertently set to zero.
8404 ----------------------------------------
8405 19 November 2004. Summary of changes for version 20041119:
8407 1) ACPI CA Core Subsystem:
8409 Fixed a problem in the internal ConvertToInteger routine where new
8411 were not truncated to 32 bits for 32-bit ACPI tables. This routine
8413 buffers and strings to integers.
8415 Implemented support to store a value to an Index() on a String object.
8417 is an ACPI 2.0 feature that had not yet been implemented.
8419 Implemented new behavior for storing objects to individual package
8421 (via the Index() operator). The previous behavior was to invoke the
8423 conversion rules if an object was already present at the index. The new
8424 behavior is to simply delete any existing object and directly store the
8426 object. Although the ACPI specification seems unclear on this subject,
8428 ACPI implementations behave in this manner. (This is the root of the
8429 AE_BAD_HEX_CONSTANT issue.)
8431 Modified the RSDP memory scan mechanism to support the extended checksum
8433 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
8434 RSDP signature is found with a valid checksum.
8436 Code and Data Size: Current and previous core subsystem library sizes are
8437 shown below. These are the code and data sizes for the acpica.lib produced
8438 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8439 any ACPI driver or OSPM code. The debug version of the code includes the
8440 debug output trace mechanism and has a much larger code and data size.
8442 that these values will vary depending on the efficiency of the compiler
8444 the compiler options used during generation.
8447 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
8448 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
8450 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
8451 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
8454 2) iASL Compiler/Disassembler:
8456 Fixed a missing semicolon in the aslcompiler.y file.
8458 ----------------------------------------
8459 05 November 2004. Summary of changes for version 20041105:
8461 1) ACPI CA Core Subsystem:
8463 Implemented support for FADT revision 2. This was an interim table
8465 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
8467 Implemented optional support to allow uninitialized LocalX and ArgX
8468 variables in a control method. The variables are initialized to an
8470 object with a value of zero. This support is enabled by setting the
8471 AcpiGbl_EnableInterpreterSlack flag to TRUE.
8473 Implemented support for Integer objects for the SizeOf operator. Either 4
8474 or 8 is returned, depending on the current integer size (32-bit or 64-bit,
8475 depending on the parent table revision).
8477 Fixed a problem in the implementation of the SizeOf and ObjectType
8479 where the operand was resolved to a value too early, causing incorrect
8480 return values for some objects.
8482 Fixed some possible memory leaks during exceptional conditions.
8484 Code and Data Size: Current and previous core subsystem library sizes are
8485 shown below. These are the code and data sizes for the acpica.lib produced
8486 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8487 any ACPI driver or OSPM code. The debug version of the code includes the
8488 debug output trace mechanism and has a much larger code and data size.
8490 that these values will vary depending on the efficiency of the compiler
8492 the compiler options used during generation.
8495 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
8496 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
8498 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
8499 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
8502 2) iASL Compiler/Disassembler:
8504 Implemented support for all ACPI 3.0 reserved names and methods.
8506 Implemented all ACPI 3.0 grammar elements in the front-end, including
8507 support for semicolons.
8509 Implemented the ACPI 3.0 Function() and ToUUID() macros
8511 Fixed a problem in the disassembler where a Scope() operator would not be
8512 emitted properly if the target of the scope was in another table.
8514 ----------------------------------------
8515 15 October 2004. Summary of changes for version 20041015:
8517 Note: ACPI CA is currently undergoing an in-depth and complete formal
8518 evaluation to test/verify the following areas. Other suggestions are
8519 welcome. This will result in an increase in the frequency of releases and
8520 the number of bug fixes in the next few months.
8521 - Functional tests for all ASL/AML operators
8522 - All implicit/explicit type conversions
8523 - Bit fields and operation regions
8524 - 64-bit math support and 32-bit-only "truncated" math support
8525 - Exceptional conditions, both compiler and interpreter
8526 - Dynamic object deletion and memory leaks
8527 - ACPI 3.0 support when implemented
8528 - External interfaces to the ACPI subsystem
8531 1) ACPI CA Core Subsystem:
8533 Fixed two alignment issues on 64-bit platforms - within debug statements
8535 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
8537 field within the non-aligned ACPI generic address structure.
8539 Fixed a problem in the Increment and Decrement operators where incorrect
8540 operand resolution could result in the inadvertent modification of the
8541 original integer when the integer is passed into another method as an
8542 argument and the arg is then incremented/decremented.
8544 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
8546 BCD number were truncated during conversion.
8548 Fixed a problem in the ToDecimal operator where the length of the
8550 string could be set incorrectly too long if the input operand was a Buffer
8553 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
8555 within a buffer would prematurely terminate a compare between buffer
8558 Added a check for string overflow (>200 characters as per the ACPI
8559 specification) during the Concatenate operator with two string operands.
8561 Code and Data Size: Current and previous core subsystem library sizes are
8562 shown below. These are the code and data sizes for the acpica.lib produced
8563 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8564 any ACPI driver or OSPM code. The debug version of the code includes the
8565 debug output trace mechanism and has a much larger code and data size.
8567 that these values will vary depending on the efficiency of the compiler
8569 the compiler options used during generation.
8572 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
8573 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
8575 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
8576 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
8580 2) iASL Compiler/Disassembler:
8582 Allow the use of the ObjectType operator on uninitialized Locals and Args
8583 (returns 0 as per the ACPI specification).
8585 Fixed a problem where the compiler would fault if there was a syntax error
8586 in the FieldName of all of the various CreateXXXField operators.
8588 Disallow the use of lower case letters within the EISAID macro, as per the
8589 ACPI specification. All EISAID strings must be of the form "UUUNNNN"
8591 U is an uppercase letter and N is a hex digit.
8594 ----------------------------------------
8595 06 October 2004. Summary of changes for version 20041006:
8597 1) ACPI CA Core Subsystem:
8599 Implemented support for the ACPI 3.0 Timer operator. This ASL function
8600 implements a 64-bit timer with 100 nanosecond granularity.
8602 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
8603 implement the ACPI 3.0 Timer operator. This allows the host OS to
8605 the timer with the best clock available. Also, it keeps the core subsystem
8606 out of the clock handling business, since the host OS (usually) performs
8609 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
8610 functions use a 64-bit address which is part of the packed ACPI Generic
8611 Address Structure. Since the structure is non-aligned, the alignment
8613 are now used to extract the address to a local variable before use.
8615 Fixed a problem where the ToInteger operator assumed all input strings
8617 hexadecimal. The operator now handles both decimal strings and hex strings
8618 (prefixed with "0x").
8620 Fixed a problem where the string length in the string object created as a
8621 result of the internal ConvertToString procedure could be incorrect. This
8622 potentially affected all implicit conversions and also the ToDecimalString
8623 and ToHexString operators.
8625 Fixed two problems in the ToString operator. If the length parameter was
8626 zero, an incorrect string object was created and the value of the input
8627 length parameter was inadvertently changed from zero to Ones.
8629 Fixed a problem where the optional ResourceSource string in the
8631 resource macro was ignored.
8633 Simplified the interfaces to the internal division functions, reducing
8635 size and complexity.
8637 Code and Data Size: Current and previous core subsystem library sizes are
8638 shown below. These are the code and data sizes for the acpica.lib produced
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: 77.9K Code, 11.4K Data, 89.3K Total
8649 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
8651 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
8652 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
8655 2) iASL Compiler/Disassembler:
8657 Implemented support for the ACPI 3.0 Timer operator.
8659 Fixed a problem where the Default() operator was inadvertently ignored in
8661 Switch/Case block. This was a problem in the translation of the Switch
8662 statement to If...Else pairs.
8664 Added support to allow a standalone Return operator, with no parentheses
8668 Fixed a problem with code generation for the ElseIf operator where the
8669 translated Else...If parse tree was improperly constructed leading to the
8672 ----------------------------------------
8673 22 September 2004. Summary of changes for version 20040922:
8675 1) ACPI CA Core Subsystem:
8677 Fixed a problem with the implementation of the LNot() operator where
8679 was not returned for the TRUE case. Changed the code to return Ones
8681 of (!Arg) which was usually 1. This change affects iASL constant folding
8685 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was not
8686 initialized properly -- Now zero the entire buffer in this case where the
8687 buffer already exists.
8689 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
8690 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
8691 related code considerably. This will require changes/updates to all OS
8692 interface layers (OSLs.)
8694 Implemented a new external interface, AcpiInstallExceptionHandler, to
8696 a system exception handler to be installed. This handler is invoked upon
8698 run-time exception that occurs during control method execution.
8700 Added support for the DSDT in AcpiTbFindTable. This allows the
8701 DataTableRegion() operator to access the local copy of the DSDT.
8703 Code and Data Size: Current and previous core subsystem library sizes are
8704 shown below. These are the code and data sizes for the acpica.lib produced
8705 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8706 any ACPI driver or OSPM code. The debug version of the code includes the
8707 debug output trace mechanism and has a much larger code and data size.
8709 that these values will vary depending on the efficiency of the compiler
8711 the compiler options used during generation.
8714 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
8715 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
8717 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
8718 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
8721 2) iASL Compiler/Disassembler:
8723 Fixed a problem with constant folding and the LNot operator. LNot was
8724 returning 1 in the TRUE case, not Ones as per the ACPI specification. This
8725 could result in the generation of an incorrect folded/reduced constant.
8727 End-Of-File is now allowed within a "//"-style comment. A parse error no
8728 longer occurs if such a comment is at the very end of the input ASL source
8731 Implemented the "-r" option to override the Revision in the table header.
8732 The initial use of this option will be to simplify the evaluation of the
8734 interpreter by allowing a single ASL source module to be compiled for
8736 32-bit or 64-bit integers.
8739 ----------------------------------------
8740 27 August 2004. Summary of changes for version 20040827:
8742 1) ACPI CA Core Subsystem:
8744 - Implemented support for implicit object conversion in the non-numeric
8745 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual, and
8746 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
8747 the second operand is implicitly converted on the fly to match the type of
8748 the first operand. For example:
8750 LEqual (Source1, Source2)
8752 Source1 and Source2 must each evaluate to an integer, a string, or a
8754 The data type of Source1 dictates the required type of Source2. Source2 is
8755 implicitly converted if necessary to match the type of Source1.
8757 - Updated and corrected the behavior of the string conversion support.
8759 rules concerning conversion of buffers to strings (according to the ACPI
8760 specification) are as follows:
8762 ToDecimalString - explicit byte-wise conversion of buffer to string of
8763 decimal values (0-255) separated by commas. ToHexString - explicit byte-
8765 conversion of buffer to string of hex values (0-FF) separated by commas.
8766 ToString - explicit byte-wise conversion of buffer to string. Byte-by-
8768 copy with no transform except NULL terminated. Any other implicit buffer-
8770 string conversion - byte-wise conversion of buffer to string of hex values
8771 (0-FF) separated by spaces.
8773 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
8775 - Fixed a problem in AcpiNsGetPathnameLength where the returned length was
8776 one byte too short in the case of a node in the root scope. This could
8777 cause a fault during debug output.
8779 - Code and Data Size: Current and previous core subsystem library sizes
8781 shown below. These are the code and data sizes for the acpica.lib
8783 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8784 any ACPI driver or OSPM code. The debug version of the code includes the
8785 debug output trace mechanism and has a much larger code and data size.
8787 that these values will vary depending on the efficiency of the compiler
8789 the compiler options used during generation.
8792 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
8793 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
8795 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
8796 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
8799 2) iASL Compiler/Disassembler:
8801 - Fixed a Linux generation error.
8804 ----------------------------------------
8805 16 August 2004. Summary of changes for version 20040816:
8807 1) ACPI CA Core Subsystem:
8809 Designed and implemented support within the AML interpreter for the so-
8810 called "implicit return". This support returns the result of the last ASL
8811 operation within a control method, in the absence of an explicit Return()
8812 operator. A few machines depend on this behavior, even though it is not
8813 explicitly supported by the ASL language. It is optional support that can
8814 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
8816 Removed support for the PCI_Config address space from the internal low
8818 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
8819 support was not used internally, and would not work correctly anyway
8821 the PCI bus number and segment number were not supported. There are
8822 separate interfaces for PCI configuration space access because of the
8826 Code and Data Size: Current and previous core subsystem library sizes are
8827 shown below. These are the code and data sizes for the acpica.lib
8829 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8830 any ACPI driver or OSPM code. The debug version of the code includes the
8831 debug output trace mechanism and has a much larger code and data size.
8833 that these values will vary depending on the efficiency of the compiler
8835 the compiler options used during generation.
8838 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
8839 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
8841 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
8842 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
8845 2) iASL Compiler/Disassembler:
8847 Fixed a problem where constants in ASL expressions at the root level (not
8848 within a control method) could be inadvertently truncated during code
8849 generation. This problem was introduced in the 20040715 release.
8852 ----------------------------------------
8853 15 July 2004. Summary of changes for version 20040715:
8855 1) ACPI CA Core Subsystem:
8857 Restructured the internal HW GPE interfaces to pass/track the current
8859 of interrupts (enabled/disabled) in order to avoid possible deadlock and
8860 increase flexibility of the interfaces.
8862 Implemented a "lexicographical compare" for String and Buffer objects
8864 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual --
8865 as per further clarification to the ACPI specification. Behavior is
8867 to C library "strcmp".
8869 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
8870 external function. In the 32-bit non-debug case, the stack use has been
8871 reduced from 168 bytes to 32 bytes.
8873 Deployed a new run-time configuration flag,
8874 AcpiGbl_EnableInterpreterSlack,
8875 whose purpose is to allow the AML interpreter to forgive certain bad AML
8876 constructs. Default setting is FALSE.
8878 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field
8880 support code. If enabled, it allows field access to go beyond the end of
8882 region definition if the field is within the region length rounded up to
8884 next access width boundary (a common coding error.)
8886 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
8887 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also,
8889 symbols are lowercased by the latest version of the AcpiSrc tool.
8891 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
8892 rename "Register" to simply "Reg" to prevent certain compilers from
8895 Code and Data Size: Current and previous core subsystem library sizes are
8896 shown below. These are the code and data sizes for the acpica.lib
8898 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8899 any ACPI driver or OSPM code. The debug version of the code includes the
8900 debug output trace mechanism and has a much larger code and data size.
8902 that these values will vary depending on the efficiency of the compiler
8904 the compiler options used during generation.
8907 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
8908 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
8910 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
8911 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
8914 2) iASL Compiler/Disassembler:
8916 Implemented full support for Package objects within the Case() operator.
8917 Note: The Break() operator is currently not supported within Case blocks
8918 (TermLists) as there is some question about backward compatibility with
8923 Fixed a problem where complex terms were not supported properly within the
8926 Eliminated extraneous warning for compiler-emitted reserved names of the
8927 form "_T_x". (Used in Switch/Case operators.)
8929 Eliminated optimization messages for "_T_x" objects and small constants
8930 within the DefinitionBlock operator.
8933 ----------------------------------------
8934 15 June 2004. Summary of changes for version 20040615:
8936 1) ACPI CA Core Subsystem:
8938 Implemented support for Buffer and String objects (as per ACPI 2.0) for
8940 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
8943 All directory names in the entire source package are lower case, as they
8944 were in earlier releases.
8946 Implemented "Disassemble" command in the AML debugger that will
8948 a single control method.
8950 Code and Data Size: Current and previous core subsystem library sizes are
8951 shown below. These are the code and data sizes for the acpica.lib
8953 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
8954 any ACPI driver or OSPM code. The debug version of the code includes the
8955 debug output trace mechanism and has a much larger code and data size.
8957 that these values will vary depending on the efficiency of the compiler
8959 the compiler options used during generation.
8962 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
8963 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
8966 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
8967 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
8970 2) iASL Compiler/Disassembler:
8972 Implemented support for Buffer and String objects (as per ACPI 2.0) for
8974 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
8977 All directory names in the entire source package are lower case, as they
8978 were in earlier releases.
8980 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
8983 Fixed an issue with the Windows version of the compiler where later
8985 of Windows place the FADT in the registry under the name "FADT" and not
8986 "FACP" as earlier versions did. This applies when using the -g or -
8987 d<nofilename> options. The compiler now looks for both strings as
8990 Fixed a problem with compiler namepath optimization where a namepath
8992 the Scope() operator could not be optimized if the namepath was a subpath
8994 the current scope path.
8996 ----------------------------------------
8997 27 May 2004. Summary of changes for version 20040527:
8999 1) ACPI CA Core Subsystem:
9001 Completed a new design and implementation for EBDA (Extended BIOS Data
9003 support in the RSDP scan code. The original code improperly scanned for
9005 EBDA by simply scanning from memory location 0 to 0x400. The correct
9007 is to first obtain the EBDA pointer from within the BIOS data area, then
9008 scan 1K of memory starting at the EBDA pointer. There appear to be few if
9009 any machines that place the RSDP in the EBDA, however.
9011 Integrated a fix for a possible fault during evaluation of BufferField
9012 arguments. Obsolete code that was causing the problem was removed.
9014 Found and fixed a problem in the Field Support Code where data could be
9015 corrupted on a bit field read that starts on an aligned boundary but does
9016 not end on an aligned boundary. Merged the read/write "datum length"
9017 calculation code into a common procedure.
9019 Rolled in a couple of changes to the FreeBSD-specific header.
9022 Code and Data Size: Current and previous core subsystem library sizes are
9023 shown below. These are the code and data sizes for the acpica.lib
9025 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9026 any ACPI driver or OSPM code. The debug version of the code includes the
9027 debug output trace mechanism and has a much larger code and data size.
9029 that these values will vary depending on the efficiency of the compiler
9031 the compiler options used during generation.
9034 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
9035 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
9037 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
9038 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
9041 2) iASL Compiler/Disassembler:
9043 Fixed a generation warning produced by some overly-verbose compilers for a
9046 ----------------------------------------
9047 14 May 2004. Summary of changes for version 20040514:
9049 1) ACPI CA Core Subsystem:
9051 Fixed a problem where hardware GPE enable bits sometimes not set properly
9052 during and after GPE method execution. Result of 04/27 changes.
9054 Removed extra "clear all GPEs" when sleeping/waking.
9056 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
9057 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above
9059 the new AcpiEv* calls as appropriate.
9061 ACPI_OS_NAME was removed from the OS-specific headers. The default name
9063 now "Microsoft Windows NT" for maximum compatibility. However this can be
9064 changed by modifying the acconfig.h file.
9066 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
9067 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
9069 Run _INI methods on ThermalZone objects. This is against the ACPI
9070 specification, but there is apparently ASL code in the field that has
9072 _INI methods, and apparently "other" AML interpreters execute them.
9074 Performed a full 16/32/64 bit lint that resulted in some small changes.
9076 Added a sleep simulation command to the AML debugger to test sleep code.
9078 Code and Data Size: Current and previous core subsystem library sizes are
9079 shown below. These are the code and data sizes for the acpica.lib
9081 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9082 any ACPI driver or OSPM code. The debug version of the code includes the
9083 debug output trace mechanism and has a much larger code and data size.
9085 that these values will vary depending on the efficiency of the compiler
9087 the compiler options used during generation.
9090 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
9091 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
9093 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
9094 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
9096 ----------------------------------------
9097 27 April 2004. Summary of changes for version 20040427:
9099 1) ACPI CA Core Subsystem:
9101 Completed a major overhaul of the GPE handling within ACPI CA. There are
9102 now three types of GPEs: wake-only, runtime-only, and combination
9104 The only GPEs allowed to be combination wake/run are for button-style
9105 devices such as a control-method power button, control-method sleep
9107 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are
9109 referenced by any _PRW methods are marked for "runtime" and hardware
9110 enabled. Any GPE that is referenced by a _PRW method is marked for "wake"
9111 (and disabled at runtime). However, at sleep time, only those GPEs that
9112 have been specifically enabled for wake via the AcpiEnableGpe interface
9114 actually be hardware enabled.
9116 A new external interface has been added, AcpiSetGpeType(), that is meant
9118 be used by device drivers to force a GPE to a particular type. It will be
9119 especially useful for the drivers for the button devices mentioned above.
9121 Completed restructuring of the ACPI CA initialization sequence so that
9122 default operation region handlers are installed before GPEs are
9124 and the _PRW methods are executed. This will prevent errors when the _PRW
9125 methods attempt to access system memory or I/O space.
9127 GPE enable/disable no longer reads the GPE enable register. We now keep
9129 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
9130 thus no longer depend on the hardware to maintain these bits.
9132 Always clear the wake status and fixed/GPE status bits before sleep, even
9135 Improved the AML debugger output for displaying the GPE blocks and their
9138 Added new strings for the _OSI method, of the form "Windows 2001 SPx"
9142 Fixed a problem where the physical address was incorrectly calculated when
9143 the Load() operator was used to directly load from an Operation Region
9145 loading from a Field object.) Also added check for minimum table length
9149 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
9152 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
9153 consistency with the other fields returned.
9155 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
9156 structure for each GPE in the system, so the size of this structure is
9159 CPU stack requirement reduction: Cleaned up the method execution and
9161 evaluation paths so that now a parameter structure is passed, instead of
9162 copying the various method parameters over and over again.
9164 In evregion.c: Correctly exit and reenter the interpreter region if and
9165 only if dispatching an operation region request to a user-installed
9167 Do not exit/reenter when dispatching to a default handler (e.g., default
9168 system memory or I/O handlers)
9171 Notes for updating drivers for the new GPE support. The following changes
9172 must be made to ACPI-related device drivers that are attached to one or
9174 GPEs: (This information will be added to the ACPI CA Programmer
9177 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you must
9178 explicitly call AcpiEnableGpe.
9179 2) There is a new interface called AcpiSetGpeType. This should be called
9180 before enabling the GPE. Also, this interface will automatically disable
9181 the GPE if it is currently enabled.
9182 3) AcpiEnableGpe no longer supports a GPE type flag.
9184 Specific drivers that must be changed:
9186 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
9187 AeGpeHandler, NULL);
9188 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
9189 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
9191 2) Button Drivers (Power, Lid, Sleep):
9192 Run _PRW method under parent device
9193 If _PRW exists: /* This is a control-method button */
9194 Extract GPE number and possibly GpeDevice
9195 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
9196 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
9198 For all other devices that have _PRWs, we automatically set the GPE type
9200 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled. This
9201 must be done on a selective basis, usually requiring some kind of user app
9202 to allow the user to pick the wake devices.
9205 Code and Data Size: Current and previous core subsystem library sizes are
9206 shown below. These are the code and data sizes for the acpica.lib
9208 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9209 any ACPI driver or OSPM code. The debug version of the code includes the
9210 debug output trace mechanism and has a much larger code and data size.
9212 that these values will vary depending on the efficiency of the compiler
9214 the compiler options used during generation.
9217 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
9218 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
9221 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
9222 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
9226 ----------------------------------------
9227 02 April 2004. Summary of changes for version 20040402:
9229 1) ACPI CA Core Subsystem:
9231 Fixed an interpreter problem where an indirect store through an ArgX
9232 parameter was incorrectly applying the "implicit conversion rules" during
9233 the store. From the ACPI specification: "If the target is a method local
9235 argument (LocalX or ArgX), no conversion is performed and the result is
9236 stored directly to the target". The new behavior is to disable implicit
9237 conversion during ALL stores to an ArgX.
9239 Changed the behavior of the _PRW method scan to ignore any and all errors
9240 returned by a given _PRW. This prevents the scan from aborting from the
9241 failure of any single _PRW.
9243 Moved the runtime configuration parameters from the global init procedure
9245 static variables in acglobal.h. This will allow the host to override the
9246 default values easily.
9248 Code and Data Size: Current and previous core subsystem library sizes are
9249 shown below. These are the code and data sizes for the acpica.lib
9251 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9252 any ACPI driver or OSPM code. The debug version of the code includes the
9253 debug output trace mechanism and has a much larger code and data size.
9255 that these values will vary depending on the efficiency of the compiler
9257 the compiler options used during generation.
9260 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
9261 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
9263 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
9264 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
9267 2) iASL Compiler/Disassembler:
9269 iASL now fully disassembles SSDTs. However, External() statements are not
9270 generated automatically for unresolved symbols at this time. This is a
9271 planned feature for future implementation.
9273 Fixed a scoping problem in the disassembler that occurs when the type of
9275 target of a Scope() operator is overridden. This problem caused an
9276 incorrectly nested internal namespace to be constructed.
9278 Any warnings or errors that are emitted during disassembly are now
9280 out automatically so that the resulting file can be recompiled without any
9283 ----------------------------------------
9284 26 March 2004. Summary of changes for version 20040326:
9286 1) ACPI CA Core Subsystem:
9288 Implemented support for "wake" GPEs via interaction between GPEs and the
9289 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
9290 identified as a WAKE GPE and by default will no longer be enabled at
9291 runtime. Previously, we were blindly enabling all GPEs with a
9293 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.
9295 believe this has been the cause of thousands of "spurious" GPEs on some
9298 This new GPE behavior is can be reverted to the original behavior (enable
9299 ALL GPEs at runtime) via a runtime flag.
9301 Fixed a problem where aliased control methods could not access objects
9302 properly. The proper scope within the namespace was not initialized
9303 (transferred to the target of the aliased method) before executing the
9306 Fixed a potential race condition on internal object deletion on the return
9307 object in AcpiEvaluateObject.
9309 Integrated a fix for resource descriptors where both _MEM and _MTP were
9310 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
9311 wide, 0x0F instead of 0x03.)
9313 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, preventing
9315 fault in some cases.
9317 Updated Notify() values for debug statements in evmisc.c
9319 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
9321 Code and Data Size: Current and previous core subsystem library sizes are
9322 shown below. These are the code and data sizes for the acpica.lib
9324 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9325 any ACPI driver or OSPM code. The debug version of the code includes the
9326 debug output trace mechanism and has a much larger code and data size.
9328 that these values will vary depending on the efficiency of the compiler
9330 the compiler options used during generation.
9334 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
9335 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
9337 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
9338 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
9340 ----------------------------------------
9341 11 March 2004. Summary of changes for version 20040311:
9343 1) ACPI CA Core Subsystem:
9345 Fixed a problem where errors occurring during the parse phase of control
9346 method execution did not abort cleanly. For example, objects created and
9347 installed in the namespace were not deleted. This caused all subsequent
9348 invocations of the method to return the AE_ALREADY_EXISTS exception.
9350 Implemented a mechanism to force a control method to "Serialized"
9352 if the method attempts to create namespace objects. (The root of the
9353 AE_ALREADY_EXISTS problem.)
9355 Implemented support for the predefined _OSI "internal" control method.
9356 Initial supported strings are "Linux", "Windows 2000", "Windows 2001", and
9357 "Windows 2001.1", and can be easily upgraded for new strings as necessary.
9358 This feature will allow "other" operating systems to execute the fully
9359 tested, "Windows" code path through the ASL code
9361 Global Lock Support: Now allows multiple acquires and releases with any
9362 internal thread. Removed concept of "owning thread" for this special
9365 Fixed two functions that were inappropriately declaring large objects on
9367 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage
9369 method execution considerably.
9371 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
9372 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
9374 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
9375 defined on the machine.
9377 Implemented two runtime options: One to force all control method
9379 to "Serialized" to mimic Windows behavior, another to disable _OSI support
9380 if it causes problems on a given machine.
9382 Code and Data Size: Current and previous core subsystem library sizes are
9383 shown below. These are the code and data sizes for the acpica.lib
9385 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
9386 any ACPI driver or OSPM code. The debug version of the code includes the
9387 debug output trace mechanism and has a much larger code and data size.
9389 that these values will vary depending on the efficiency of the compiler
9391 the compiler options used during generation.
9394 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
9395 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
9397 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
9398 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
9400 2) iASL Compiler/Disassembler:
9402 Fixed an array size problem for FreeBSD that would cause the compiler to
9405 ----------------------------------------
9406 20 February 2004. Summary of changes for version 20040220:
9409 1) ACPI CA Core Subsystem:
9411 Implemented execution of _SxD methods for Device objects in the
9412 GetObjectInfo interface.
9414 Fixed calls to _SST method to pass the correct arguments.
9416 Added a call to _SST on wake to restore to "working" state.
9418 Check for End-Of-Buffer failure case in the WalkResources interface.
9420 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
9421 structures to the beginning of the file.
9423 After wake, clear GPE status register(s) before enabling GPEs.
9425 After wake, clear/enable power button. (Perhaps we should clear/enable
9427 fixed events upon wake.)
9429 Fixed a couple of possible memory leaks in the Namespace manager.
9431 Integrated latest acnetbsd.h file.
9433 ----------------------------------------
9434 11 February 2004. Summary of changes for version 20040211:
9437 1) ACPI CA Core Subsystem:
9439 Completed investigation and implementation of the call-by-reference
9440 mechanism for control method arguments.
9442 Fixed a problem where a store of an object into an indexed package could
9443 fail if the store occurs within a different method than the method that
9444 created the package.
9446 Fixed a problem where the ToDecimal operator could return incorrect
9449 Fixed a problem where the CopyObject operator could fail on some of the
9451 obscure objects (e.g., Reference objects.)
9453 Improved the output of the Debug object to display buffer, package, and
9456 Fixed a problem where constructs of the form "RefOf (ArgX)" did not return
9457 the expected result.
9459 Added permanent ACPI_REPORT_ERROR macros for all instances of the
9460 ACPI_AML_INTERNAL exception.
9462 Integrated latest version of acfreebsd.h
9464 ----------------------------------------
9465 16 January 2004. Summary of changes for version 20040116:
9467 The purpose of this release is primarily to update the copyright years in
9468 each module, thus causing a huge number of diffs. There are a few small
9469 functional changes, however.
9471 1) ACPI CA Core Subsystem:
9473 Improved error messages when there is a problem finding one or more of the
9474 required base ACPI tables
9476 Reintroduced the definition of APIC_HEADER in actbl.h
9478 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
9480 Removed extraneous reference to NewObj in dsmthdat.c
9484 Fixed a problem introduced in December that disabled the correct
9486 of Resource Templates
9489 ----------------------------------------
9490 03 December 2003. Summary of changes for version 20031203:
9492 1) ACPI CA Core Subsystem:
9494 Changed the initialization of Operation Regions during subsystem
9495 init to perform two entire walks of the ACPI namespace; The first
9496 to initialize the regions themselves, the second to execute the
9497 _REG methods. This fixed some interdependencies across _REG
9498 methods found on some machines.
9500 Fixed a problem where a Store(Local0, Local1) could simply update
9501 the object reference count, and not create a new copy of the
9502 object if the Local1 is uninitialized.
9504 Implemented support for the _SST reserved method during sleep
9507 Implemented support to clear the SLP_TYP and SLP_EN bits when
9508 waking up, this is apparently required by some machines.
9510 When sleeping, clear the wake status only if SleepState is not S5.
9512 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
9513 pointer arithmetic advanced a string pointer too far.
9515 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
9516 could be returned if the requested table has not been loaded.
9518 Within the support for IRQ resources, restructured the handling of
9519 the active and edge/level bits.
9521 Fixed a few problems in AcpiPsxExecute() where memory could be
9522 leaked under certain error conditions.
9524 Improved error messages for the cases where the ACPI mode could
9527 Code and Data Size: Current and previous core subsystem library
9528 sizes are shown below. These are the code and data sizes for the
9529 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
9530 these values do not include any ACPI driver or OSPM code. The
9531 debug version of the code includes the debug output trace
9532 mechanism and has a much larger code and data size. Note that
9533 these values will vary depending on the efficiency of the compiler
9534 and the compiler options used during generation.
9536 Previous Release (20031029):
9537 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
9538 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
9540 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
9541 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
9543 2) iASL Compiler/Disassembler:
9545 Implemented a fix for the iASL disassembler where a bad index was
9546 generated. This was most noticeable on 64-bit platforms
9549 ----------------------------------------
9550 29 October 2003. Summary of changes for version 20031029:
9552 1) ACPI CA Core Subsystem:
9555 Fixed a problem where a level-triggered GPE with an associated
9556 _Lxx control method was incorrectly cleared twice.
9558 Fixed a problem with the Field support code where an access can
9559 occur beyond the end-of-region if the field is non-aligned but
9560 extends to the very end of the parent region (resulted in an
9561 AE_AML_REGION_LIMIT exception.)
9563 Fixed a problem with ACPI Fixed Events where an RT Clock handler
9564 would not get invoked on an RTC event. The RTC event bitmasks for
9565 the PM1 registers were not being initialized properly.
9567 Implemented support for executing _STA and _INI methods for
9568 Processor objects. Although this is currently not part of the
9569 ACPI specification, there is existing ASL code that depends on the
9570 init-time execution of these methods.
9572 Implemented and deployed a GetDescriptorName function to decode
9573 the various types of internal descriptors. Guards against null
9574 descriptors during debug output also.
9576 Implemented and deployed a GetNodeName function to extract the 4-
9577 character namespace node name. This function simplifies the debug
9578 and error output, as well as guarding against null pointers during
9581 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
9582 simplify the debug and error output of 64-bit integers. This
9583 macro replaces the HIDWORD and LODWORD macros for dumping these
9586 Updated the implementation of the Stall() operator to only call
9587 AcpiOsStall(), and also return an error if the operand is larger
9588 than 255. This preserves the required behavior of not
9589 relinquishing the processor, as would happen if AcpiOsSleep() was
9590 called for "long stalls".
9592 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
9593 initialized are now treated as NOOPs.
9595 Cleaned up a handful of warnings during 64-bit generation.
9597 Fixed a reported error where and incorrect GPE number was passed
9598 to the GPE dispatch handler. This value is only used for error
9599 output, however. Used this opportunity to clean up and streamline
9600 the GPE dispatch code.
9602 Code and Data Size: Current and previous core subsystem library
9603 sizes are shown below. These are the code and data sizes for the
9604 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
9605 these values do not include any ACPI driver or OSPM code. The
9607 debug version of the code includes the debug output trace
9608 mechanism and has a much larger code and data size. Note that
9609 these values will vary depending on the efficiency of the compiler
9610 and the compiler options used during generation.
9612 Previous Release (20031002):
9613 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
9614 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
9616 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
9617 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
9620 2) iASL Compiler/Disassembler:
9622 Updated the iASL compiler to return an error if the operand to the
9623 Stall() operator is larger than 255.
9626 ----------------------------------------
9627 02 October 2003. Summary of changes for version 20031002:
9630 1) ACPI CA Core Subsystem:
9632 Fixed a problem with Index Fields where the index was not
9633 incremented for fields that require multiple writes to the
9634 index/data registers (Fields that are wider than the data
9637 Fixed a problem with all Field objects where a write could go
9638 beyond the end-of-field if the field was larger than the access
9639 granularity and therefore required multiple writes to complete the
9640 request. An extra write beyond the end of the field could happen
9643 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
9644 would incorrectly be returned if the width of the Data Register
9645 was larger than the specified field access width.
9647 Completed fixes for LoadTable() and Unload() and verified their
9648 operation. Implemented full support for the "DdbHandle" object
9649 throughout the ACPI CA subsystem.
9651 Implemented full support for the MADT and ECDT tables in the ACPI
9652 CA header files. Even though these tables are not directly
9653 consumed by ACPI CA, the header definitions are useful for ACPI
9656 Integrated resource descriptor fixes posted to the Linux ACPI
9657 list. This included checks for minimum descriptor length, and
9658 support for trailing NULL strings within descriptors that have
9659 optional string elements.
9661 Code and Data Size: Current and previous core subsystem library
9662 sizes are shown below. These are the code and data sizes for the
9663 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
9664 these values do not include any ACPI driver or OSPM code. The
9665 debug version of the code includes the debug output trace
9666 mechanism and has a much larger code and data size. Note that
9667 these values will vary depending on the efficiency of the compiler
9668 and the compiler options used during generation.
9670 Previous Release (20030918):
9671 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
9672 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
9674 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
9675 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
9680 Implemented detection of non-ASCII characters within the input
9681 source ASL file. This catches attempts to compile binary (AML)
9682 files early in the compile, with an informative error message.
9684 Fixed a problem where the disassembler would fault if the output
9685 filename could not be generated or if the output file could not be
9688 ----------------------------------------
9689 18 September 2003. Summary of changes for version 20030918:
9692 1) ACPI CA Core Subsystem:
9694 Found and fixed a longstanding problem with the late execution of
9695 the various deferred AML opcodes (such as Operation Regions,
9696 Buffer Fields, Buffers, and Packages). If the name string
9697 specified for the name of the new object placed the object in a
9698 scope other than the current scope, the initialization/execution
9699 of the opcode failed. The solution to this problem was to
9700 implement a mechanism where the late execution of such opcodes
9701 does not attempt to lookup/create the name a second time in an
9702 incorrect scope. This fixes the "region size computed
9703 incorrectly" problem.
9705 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
9706 Global Lock AE_BAD_PARAMETER error.
9708 Fixed several 64-bit issues with prototypes, casting and data
9711 Removed duplicate prototype from acdisasm.h
9713 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
9715 Code and Data Size: Current and previous core subsystem library
9716 sizes are shown below. These are the code and data sizes for the
9717 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
9718 these values do not include any ACPI driver or OSPM code. The
9719 debug version of the code includes the debug output trace
9720 mechanism and has a much larger code and data size. Note that
9721 these values will vary depending on the efficiency of the compiler
9722 and the compiler options used during generation.
9726 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
9727 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
9729 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
9730 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
9735 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
9736 correct sleep time in seconds.
9738 ----------------------------------------
9739 14 July 2003. Summary of changes for version 20030619:
9741 1) ACPI CA Core Subsystem:
9743 Parse SSDTs in order discovered, as opposed to reverse order
9746 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
9753 Dynamically allocate SDT list (suggested by Andi Kleen)
9755 proc function return value cleanups (Andi Kleen)
9757 Correctly handle NMI watchdog during long stalls (Andrew Morton)
9759 Make it so acpismp=force works (reported by Andrew Morton)
9762 ----------------------------------------
9763 19 June 2003. Summary of changes for version 20030619:
9765 1) ACPI CA Core Subsystem:
9767 Fix To/FromBCD, eliminating the need for an arch-specific #define.
9769 Do not acquire a semaphore in the S5 shutdown path.
9771 Fix ex_digits_needed for 0. (Takayoshi Kochi)
9773 Fix sleep/stall code reversal. (Andi Kleen)
9775 Revert a change having to do with control method calling
9780 acpiphp update (Takayoshi Kochi)
9782 Export acpi_disabled for sonypi (Stelian Pop)
9784 Mention acpismp=force in config help
9786 Re-add acpitable.c and acpismp=force. This improves backwards
9788 compatibility and also cleans up the code to a significant degree.
9790 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
9792 ----------------------------------------
9793 22 May 2003. Summary of changes for version 20030522:
9795 1) ACPI CA Core Subsystem:
9797 Found and fixed a reported problem where an AE_NOT_FOUND error
9798 occurred occasionally during _BST evaluation. This turned out to
9799 be an Owner ID allocation issue where a called method did not get
9800 a new ID assigned to it. Eventually, (after 64k calls), the Owner
9801 ID UINT16 would wraparound so that the ID would be the same as the
9802 caller's and the called method would delete the caller's
9805 Implemented extended error reporting for control methods that are
9806 aborted due to a run-time exception. Output includes the exact
9807 AML instruction that caused the method abort, a dump of the method
9808 locals and arguments at the time of the abort, and a trace of all
9809 nested control method calls.
9811 Modified the interpreter to allow the creation of buffers of zero
9812 length from the AML code. Implemented new code to ensure that no
9813 attempt is made to actually allocate a memory buffer (of length
9814 zero) - instead, a simple buffer object with a NULL buffer pointer
9815 and length zero is created. A warning is no longer issued when
9816 the AML attempts to create a zero-length buffer.
9818 Implemented a workaround for the "leading asterisk issue" in
9819 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
9820 asterisk is automatically removed if present in any HID, UID, or
9821 CID strings. The iASL compiler will still flag this asterisk as
9824 Implemented full support for _CID methods that return a package of
9825 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
9826 now additionally returns a device _CID list if present. This
9827 required a change to the external interface in order to pass an
9828 ACPI_BUFFER object as a parameter since the _CID list is of
9831 Fixed a problem with the new AE_SAME_HANDLER exception where
9832 handler initialization code did not know about this exception.
9834 Code and Data Size: Current and previous core subsystem library
9835 sizes are shown below. These are the code and data sizes for the
9836 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
9837 these values do not include any ACPI driver or OSPM code. The
9838 debug version of the code includes the debug output trace
9839 mechanism and has a much larger code and data size. Note that
9840 these values will vary depending on the efficiency of the compiler
9841 and the compiler options used during generation.
9843 Previous Release (20030509):
9844 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
9845 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
9847 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
9848 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
9853 Fixed a bug in which we would reinitialize the ACPI interrupt
9854 after it was already working, thus disabling all ACPI and the IRQs
9855 for any other device sharing the interrupt. (Thanks to Stian
9858 Toshiba driver update (John Belmonte)
9860 Return only 0 or 1 for our interrupt handler status (Andrew
9866 Fixed a reported problem where multiple (nested) ElseIf()
9867 statements were not handled correctly by the compiler, resulting
9868 in incorrect warnings and incorrect AML code. This was a problem
9869 in both the ASL parser and the code generator.
9874 Added changes to existing interfaces, new exception codes, and new
9875 text concerning reference count object management versus garbage
9878 ----------------------------------------
9879 09 May 2003. Summary of changes for version 20030509.
9882 1) ACPI CA Core Subsystem:
9884 Changed the subsystem initialization sequence to hold off
9885 installation of address space handlers until the hardware has been
9886 initialized and the system has entered ACPI mode. This is because
9887 the installation of space handlers can cause _REG methods to be
9888 run. Previously, the _REG methods could potentially be run before
9889 ACPI mode was enabled.
9891 Fixed some memory leak issues related to address space handler and
9892 notify handler installation. There were some problems with the
9893 reference count mechanism caused by the fact that the handler
9894 objects are shared across several namespace objects.
9896 Fixed a reported problem where reference counts within the
9897 namespace were not properly updated when named objects created by
9898 method execution were deleted.
9900 Fixed a reported problem where multiple SSDTs caused a deletion
9901 issue during subsystem termination. Restructured the table data
9902 structures to simplify the linked lists and the related code.
9904 Fixed a problem where the table ID associated with secondary
9905 tables (SSDTs) was not being propagated into the namespace objects
9906 created by those tables. This would only present a problem for
9907 tables that are unloaded at run-time, however.
9909 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
9910 type as the length parameter (instead of UINT32).
9912 Solved a long-standing problem where an ALREADY_EXISTS error
9913 appears on various systems. This problem could happen when there
9914 are multiple PCI_Config operation regions under a single PCI root
9915 bus. This doesn't happen very frequently, but there are some
9916 systems that do this in the ASL.
9918 Fixed a reported problem where the internal DeleteNode function
9919 was incorrectly handling the case where a namespace node was the
9920 first in the parent's child list, and had additional peers (not
9921 the only child, but first in the list of children.)
9923 Code and Data Size: Current core subsystem library sizes are shown
9924 below. These are the code and data sizes for the acpica.lib
9925 produced by the Microsoft Visual C++ 6.0 compiler, and these
9926 values do not include any ACPI driver or OSPM code. The debug
9927 version of the code includes the debug output trace mechanism and
9928 has a much larger code and data size. Note that these values will
9929 vary depending on the efficiency of the compiler and the compiler
9930 options used during generation.
9933 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
9934 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
9936 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
9937 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
9942 Allow ":" in OS override string (Ducrot Bruno)
9944 Kobject fix (Greg KH)
9947 3 iASL Compiler/Disassembler:
9949 Fixed a problem in the generation of the C source code files (AML
9950 is emitted in C source statements for BIOS inclusion) where the
9951 Ascii dump that appears within a C comment at the end of each line
9952 could cause a compile time error if the AML sequence happens to
9953 have an open comment or close comment sequence embedded.
9956 ----------------------------------------
9957 24 April 2003. Summary of changes for version 20030424.
9960 1) ACPI CA Core Subsystem:
9962 Support for big-endian systems has been implemented. Most of the
9963 support has been invisibly added behind big-endian versions of the
9966 Fixed a problem in AcpiHwDisableGpeBlock() and
9967 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
9968 low level hardware write routine. The offset parameter was
9969 actually eliminated from the low level read/write routines because
9970 they had become obsolete.
9972 Fixed a problem where a handler object was deleted twice during
9973 the removal of a fixed event handler.
9978 A fix for SMP systems with link devices was contributed by
9982 (2.5) Return whether we handled the interrupt in our IRQ handler.
9983 (Linux ISRs no longer return void, so we can propagate the handler
9984 return value from the ACPI CA core back to the OS.)
9990 The ACPI CA Programmer Reference has been updated to reflect new
9991 interfaces and changes to existing interfaces.
9993 ----------------------------------------
9994 28 March 2003. Summary of changes for version 20030328.
9996 1) ACPI CA Core Subsystem:
9998 The GPE Block Device support has been completed. New interfaces
9999 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
10000 interfaces (enable, disable, clear, getstatus) have been split
10001 into separate interfaces for Fixed Events and General Purpose
10002 Events (GPEs) in order to support GPE Block Devices properly.
10004 Fixed a problem where the error message "Failed to acquire
10005 semaphore" would appear during operations on the embedded
10008 Code and Data Size: Current core subsystem library sizes are shown
10009 below. These are the code and data sizes for the acpica.lib
10010 produced by the Microsoft Visual C++ 6.0 compiler, and these
10011 values do not include any ACPI driver or OSPM code. The debug
10012 version of the code includes the debug output trace mechanism and
10013 has a much larger code and data size. Note that these values will
10014 vary depending on the efficiency of the compiler and the compiler
10015 options used during generation.
10018 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
10019 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
10021 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
10022 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
10025 ----------------------------------------
10026 28 February 2003. Summary of changes for version 20030228.
10029 1) ACPI CA Core Subsystem:
10031 The GPE handling and dispatch code has been completely overhauled
10032 in preparation for support of GPE Block Devices (ID ACPI0006).
10033 This affects internal data structures and code only; there should
10034 be no differences visible externally. One new file has been
10037 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
10038 fields that are used to determine the GPE block lengths. The
10039 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
10040 structures are ignored. This is per the ACPI specification but it
10041 isn't very clear. The full 256 Block 0/1 GPEs are now supported
10042 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
10044 In the SCI interrupt handler, removed the read of the PM1_CONTROL
10045 register to look at the SCI_EN bit. On some machines, this read
10046 causes an SMI event and greatly slows down SCI events. (This may
10047 in fact be the cause of slow battery status response on some
10050 Fixed a problem where a store of a NULL string to a package object
10051 could cause the premature deletion of the object. This was seen
10052 during execution of the battery _BIF method on some systems,
10053 resulting in no battery data being returned.
10055 Added AcpiWalkResources interface to simplify parsing of resource
10058 Code and Data Size: Current core subsystem library sizes are shown
10059 below. These are the code and data sizes for the acpica.lib
10060 produced by the Microsoft Visual C++ 6.0 compiler, and these
10061 values do not include any ACPI driver or OSPM code. The debug
10062 version of the code includes the debug output trace mechanism and
10063 has a much larger code and data size. Note that these values will
10064 vary depending on the efficiency of the compiler and the compiler
10065 options used during generation.
10068 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
10069 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
10071 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
10072 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
10077 S3 fixes (Ole Rohne)
10079 Update ACPI PHP driver with to use new acpi_walk_resource API
10082 Add S4BIOS support (Pavel Machek)
10084 Map in entire table before performing checksum (John Stultz)
10086 Expand the mem= cmdline to allow the specification of reserved and
10087 ACPI DATA blocks (Pavel Machek)
10089 Never use ACPI on VISWS
10091 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
10093 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
10094 causing us to think that some systems support C2 when they really
10097 Do not count processor objects for non-present CPUs (Thanks to
10103 Fixed a problem where ASL include files could not be found and
10106 Added support for the _PDC reserved name.
10109 ----------------------------------------
10110 22 January 2003. Summary of changes for version 20030122.
10113 1) ACPI CA Core Subsystem:
10115 Added a check for constructs of the form: Store (Local0, Local0)
10116 where Local0 is not initialized. Apparently, some BIOS
10117 programmers believe that this is a NOOP. Since this store doesn't
10118 do anything anyway, the new prototype behavior will ignore this
10119 error. This is a case where we can relax the strict checking in
10120 the interpreter in the name of compatibility.
10125 The AcpiSrc Source Conversion Utility has been released with the
10126 Linux package for the first time. This is the utility that is
10127 used to convert the ACPI CA base source code to the Linux version.
10129 (Both) Handle P_BLK lengths shorter than 6 more gracefully
10131 (Both) Move more headers to include/acpi, and delete an unused
10134 (Both) Move drivers/acpi/include directory to include/acpi
10136 (Both) Boot functions don't use cmdline, so don't pass it around
10138 (Both) Remove include of unused header (Adrian Bunk)
10140 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
10142 former now also includes the latter, acpiphp.h only needs the one,
10145 (2.5) Make it possible to select method of bios restoring after S3
10146 resume. [=> no more ugly ifdefs] (Pavel Machek)
10148 (2.5) Make proc write interfaces work (Pavel Machek)
10150 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
10152 (2.5) Break out ACPI Perf code into its own module, under cpufreq
10153 (Dominik Brodowski)
10155 (2.4) S4BIOS support (Ducrot Bruno)
10157 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
10163 Added support to disassemble SSDT and PSDTs.
10165 Implemented support to obtain SSDTs from the Windows registry if
10169 ----------------------------------------
10170 09 January 2003. Summary of changes for version 20030109.
10172 1) ACPI CA Core Subsystem:
10174 Changed the behavior of the internal Buffer-to-String conversion
10175 function. The current ACPI specification states that the contents
10176 of the buffer are "converted to a string of two-character
10177 hexadecimal numbers, each separated by a space". Unfortunately,
10178 this definition is not backwards compatible with existing ACPI 1.0
10179 implementations (although the behavior was not defined in the ACPI
10180 1.0 specification). The new behavior simply copies data from the
10181 buffer to the string until a null character is found or the end of
10182 the buffer is reached. The new String object is always null
10183 terminated. This problem was seen during the generation of _BIF
10184 battery data where incorrect strings were returned for battery
10185 type, etc. This will also require an errata to the ACPI
10188 Renamed all instances of NATIVE_UINT and NATIVE_INT to
10189 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
10191 Copyright in all module headers (both Linux and non-Linux) has be
10194 Code and Data Size: Current core subsystem library sizes are shown
10195 below. These are the code and data sizes for the acpica.lib
10196 produced by the Microsoft Visual C++ 6.0 compiler, and these
10197 values do not include any ACPI driver or OSPM code. The debug
10198 version of the code includes the debug output trace mechanism and
10199 has a much larger code and data size. Note that these values will
10200 vary depending on the efficiency of the compiler and the compiler
10201 options used during generation.
10204 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
10205 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
10207 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
10208 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
10213 Fixed an oops on module insertion/removal (Matthew Tippett)
10215 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
10217 (2.5) Replace pr_debug (Randy Dunlap)
10219 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
10221 (Both) Eliminate spawning of thread from timer callback, in favor
10224 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
10226 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
10228 (Both) Add missing statics to button.c (Pavel Machek)
10230 Several changes have been made to the source code translation
10231 utility that generates the Linux Code in order to make the code
10234 All typedefs on structs and unions have been removed in keeping
10235 with the Linux coding style.
10237 Removed the non-Linux SourceSafe module revision number from each
10240 Completed major overhaul of symbols to be lowercased for linux.
10241 Doubled the number of symbols that are lowercased.
10243 Fixed a problem where identifiers within procedure headers and
10244 within quotes were not fully lower cased (they were left with a
10247 Some C macros whose only purpose is to allow the generation of 16-
10248 bit code are now completely removed in the Linux code, increasing
10249 readability and maintainability.
10251 ----------------------------------------
10253 12 December 2002. Summary of changes for version 20021212.
10256 1) ACPI CA Core Subsystem:
10258 Fixed a problem where the creation of a zero-length AML Buffer
10259 would cause a fault.
10261 Fixed a problem where a Buffer object that pointed to a static AML
10262 buffer (in an ACPI table) could inadvertently be deleted, causing
10265 Fixed a problem where a user buffer (passed in to the external
10266 ACPI CA interfaces) could be overwritten if the buffer was too
10267 small to complete the operation, causing memory corruption.
10269 Fixed a problem in the Buffer-to-String conversion code where a
10270 string of length one was always returned, regardless of the size
10271 of the input Buffer object.
10273 Removed the NATIVE_CHAR data type across the entire source due to
10274 lack of need and lack of consistent use.
10276 Code and Data Size: Current core subsystem library sizes are shown
10277 below. These are the code and data sizes for the acpica.lib
10278 produced by the Microsoft Visual C++ 6.0 compiler, and these
10279 values do not include any ACPI driver or OSPM code. The debug
10280 version of the code includes the debug output trace mechanism and
10281 has a much larger code and data size. Note that these values will
10282 vary depending on the efficiency of the compiler and the compiler
10283 options used during generation.
10286 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
10287 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
10289 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
10290 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
10293 ----------------------------------------
10294 05 December 2002. Summary of changes for version 20021205.
10296 1) ACPI CA Core Subsystem:
10298 Fixed a problem where a store to a String or Buffer object could
10299 cause corruption of the DSDT if the object type being stored was
10300 the same as the target object type and the length of the object
10301 being stored was equal to or smaller than the original (existing)
10302 target object. This was seen to cause corruption of battery _BIF
10303 buffers if the _BIF method modified the buffer on the fly.
10305 Fixed a problem where an internal error was generated if a control
10306 method invocation was used in an OperationRegion, Buffer, or
10307 Package declaration. This was caused by the deferred parsing of
10308 the control method and thus the deferred creation of the internal
10309 method object. The solution to this problem was to create the
10310 internal method object at the moment the method is encountered in
10311 the first pass - so that subsequent references to the method will
10312 able to obtain the required parameter count and thus properly
10313 parse the method invocation. This problem presented itself as an
10314 AE_AML_INTERNAL during the pass 1 parse phase during table load.
10316 Fixed a problem where the internal String object copy routine did
10317 not always allocate sufficient memory for the target String object
10318 and caused memory corruption. This problem was seen to cause
10319 "Allocation already present in list!" errors as memory allocation
10322 Implemented a new function for the evaluation of namespace objects
10323 that allows the specification of the allowable return object
10324 types. This simplifies a lot of code that checks for a return
10325 object of one or more specific objects returned from the
10326 evaluation (such as _STA, etc.) This may become and external
10327 function if it would be useful to ACPI-related drivers.
10329 Completed another round of prefixing #defines with "ACPI_" for
10332 Completed additional code restructuring to allow more modular
10333 linking for iASL compiler and AcpiExec. Several files were split
10334 creating new files. New files: nsparse.c dsinit.c evgpe.c
10336 Implemented an abort mechanism to terminate an executing control
10337 method via the AML debugger. This feature is useful for debugging
10338 control methods that depend (wait) for specific hardware
10341 Code and Data Size: Current core subsystem library sizes are shown
10342 below. These are the code and data sizes for the acpica.lib
10343 produced by the Microsoft Visual C++ 6.0 compiler, and these
10344 values do not include any ACPI driver or OSPM code. The debug
10345 version of the code includes the debug output trace mechanism and
10346 has a much larger code and data size. Note that these values will
10347 vary depending on the efficiency of the compiler and the compiler
10348 options used during generation.
10351 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
10352 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
10354 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
10355 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
10358 2) iASL Compiler/Disassembler
10360 Fixed a compiler code generation problem for "Interrupt" Resource
10361 Descriptors. If specified in the ASL, the optional "Resource
10362 Source Index" and "Resource Source" fields were not inserted into
10363 the correct location within the AML resource descriptor, creating
10364 an invalid descriptor.
10366 Fixed a disassembler problem for "Interrupt" resource descriptors.
10367 The optional "Resource Source Index" and "Resource Source" fields
10371 ----------------------------------------
10372 22 November 2002. Summary of changes for version 20021122.
10375 1) ACPI CA Core Subsystem:
10377 Fixed a reported problem where an object stored to a Method Local
10378 or Arg was not copied to a new object during the store - the
10379 object pointer was simply copied to the Local/Arg. This caused
10380 all subsequent operations on the Local/Arg to also affect the
10381 original source of the store operation.
10383 Fixed a problem where a store operation to a Method Local or Arg
10384 was not completed properly if the Local/Arg contained a reference
10385 (from RefOf) to a named field. The general-purpose store-to-
10386 namespace-node code is now used so that this case is handled
10389 Fixed a problem where the internal object copy routine would cause
10390 a protection fault if the object being copied was a Package and
10391 contained either 1) a NULL package element or 2) a nested sub-
10394 Fixed a problem with the GPE initialization that resulted from an
10395 ambiguity in the ACPI specification. One section of the
10396 specification states that both the address and length of the GPE
10397 block must be zero if the block is not supported. Another section
10398 implies that only the address need be zero if the block is not
10399 supported. The code has been changed so that both the address and
10400 the length must be non-zero to indicate a valid GPE block (i.e.,
10401 if either the address or the length is zero, the GPE block is
10404 Code and Data Size: Current core subsystem library sizes are shown
10405 below. These are the code and data sizes for the acpica.lib
10406 produced by the Microsoft Visual C++ 6.0 compiler, and these
10407 values do not include any ACPI driver or OSPM code. The debug
10408 version of the code includes the debug output trace mechanism and
10409 has a much larger code and data size. Note that these values will
10410 vary depending on the efficiency of the compiler and the compiler
10411 options used during generation.
10414 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
10415 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
10417 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
10418 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
10423 Cleaned up EC driver. Exported an external EC read/write
10424 interface. By going through this, other drivers (most notably
10425 sonypi) will be able to serialize access to the EC.
10428 3) iASL Compiler/Disassembler
10430 Implemented support to optionally generate include files for both
10431 ASM and C (the -i switch). This simplifies BIOS development by
10432 automatically creating include files that contain external
10433 declarations for the symbols that are created within the
10435 (optionally generated) ASM and C AML source files.
10438 ----------------------------------------
10439 15 November 2002. Summary of changes for version 20021115.
10441 1) ACPI CA Core Subsystem:
10443 Fixed a memory leak problem where an error during resolution of
10445 method arguments during a method invocation from another method
10446 failed to cleanup properly by deleting all successfully resolved
10449 Fixed a problem where the target of the Index() operator was not
10450 correctly constructed if the source object was a package. This
10451 problem has not been detected because the use of a target operand
10452 with Index() is very rare.
10454 Fixed a problem with the Index() operator where an attempt was
10455 made to delete the operand objects twice.
10457 Fixed a problem where an attempt was made to delete an operand
10458 twice during execution of the CondRefOf() operator if the target
10461 Implemented the first of perhaps several internal create object
10462 functions that create and initialize a specific object type. This
10463 consolidates duplicated code wherever the object is created, thus
10464 shrinking the size of the subsystem.
10466 Implemented improved debug/error messages for errors that occur
10467 during nested method invocations. All executing method pathnames
10468 are displayed (with the error) as the call stack is unwound - thus
10471 Fixed a problem introduced in the 10/02 release that caused
10472 premature deletion of a buffer object if a buffer was used as an
10473 ASL operand where an integer operand is required (Thus causing an
10474 implicit object conversion from Buffer to Integer.) The change in
10475 the 10/02 release was attempting to fix a memory leak (albeit
10478 Code and Data Size: Current core subsystem library sizes are shown
10479 below. These are the code and data sizes for the acpica.lib
10480 produced by the Microsoft Visual C++ 6.0 compiler, and these
10481 values do not include any ACPI driver or OSPM code. The debug
10482 version of the code includes the debug output trace mechanism and
10483 has a much larger code and data size. Note that these values will
10484 vary depending on the efficiency of the compiler and the compiler
10485 options used during generation.
10488 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
10489 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
10491 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
10492 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
10497 Changed the implementation of the ACPI semaphores to use down()
10498 instead of down_interruptable(). It is important that the
10499 execution of ACPI control methods not be interrupted by signals.
10500 Methods must run to completion, or the system may be left in an
10501 unknown/unstable state.
10503 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
10507 3) iASL Compiler/Disassembler
10510 Changed the default location of output files. All output files
10511 are now placed in the current directory by default instead of in
10512 the directory of the source file. This change may affect some
10513 existing makefiles, but it brings the behavior of the compiler in
10514 line with other similar tools. The location of the output files
10515 can be overridden with the -p command line switch.
10518 ----------------------------------------
10519 11 November 2002. Summary of changes for version 20021111.
10522 0) ACPI Specification 2.0B is released and is now available at:
10523 http://www.acpi.info/index.html
10526 1) ACPI CA Core Subsystem:
10528 Implemented support for the ACPI 2.0 SMBus Operation Regions.
10529 This includes the early detection and handoff of the request to
10530 the SMBus region handler (avoiding all of the complex field
10531 support code), and support for the bidirectional return packet
10532 from an SMBus write operation. This paves the way for the
10533 development of SMBus drivers in each host operating system.
10535 Fixed a problem where the semaphore WAIT_FOREVER constant was
10536 defined as 32 bits, but must be 16 bits according to the ACPI
10537 specification. This had the side effect of causing ASL
10538 Mutex/Event timeouts even though the ASL code requested a wait
10539 forever. Changed all internal references to the ACPI timeout
10540 parameter to 16 bits to prevent future problems. Changed the name
10541 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
10543 Code and Data Size: Current core subsystem library sizes are shown
10544 below. These are the code and data sizes for the acpica.lib
10545 produced by the Microsoft Visual C++ 6.0 compiler, and these
10546 values do not include any ACPI driver or OSPM code. The debug
10547 version of the code includes the debug output trace mechanism and
10548 has a much larger code and data size. Note that these values will
10549 vary depending on the efficiency of the compiler and the compiler
10550 options used during generation.
10553 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
10554 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
10556 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
10557 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
10562 Module loading/unloading fixes (John Cagle)
10565 3) iASL Compiler/Disassembler
10567 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
10569 Implemented support for the disassembly of all SMBus protocol
10570 keywords (SMBQuick, SMBWord, etc.)
10572 ----------------------------------------
10573 01 November 2002. Summary of changes for version 20021101.
10576 1) ACPI CA Core Subsystem:
10578 Fixed a problem where platforms that have a GPE1 block but no GPE0
10579 block were not handled correctly. This resulted in a "GPE
10580 overlap" error message. GPE0 is no longer required.
10582 Removed code added in the previous release that inserted nodes
10583 into the namespace in alphabetical order. This caused some side-
10584 effects on various machines. The root cause of the problem is
10585 still under investigation since in theory, the internal ordering
10586 of the namespace nodes should not matter.
10589 Enhanced error reporting for the case where a named object is not
10590 found during control method execution. The full ACPI namepath
10591 (name reference) of the object that was not found is displayed in
10594 Note: as a result of the overhaul of the namespace object types in
10595 the previous release, the namespace nodes for the predefined
10596 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
10597 instead of ACPI_TYPE_ANY. This simplifies the namespace
10598 management code but may affect code that walks the namespace tree
10599 looking for specific object types.
10601 Code and Data Size: Current core subsystem library sizes are shown
10602 below. These are the code and data sizes for the acpica.lib
10603 produced by the Microsoft Visual C++ 6.0 compiler, and these
10604 values do not include any ACPI driver or OSPM code. The debug
10605 version of the code includes the debug output trace mechanism and
10606 has a much larger code and data size. Note that these values will
10607 vary depending on the efficiency of the compiler and the compiler
10608 options used during generation.
10611 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
10612 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
10614 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
10615 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
10620 Fixed a problem introduced in the previous release where the
10621 Processor and Thermal objects were not recognized and installed in
10622 /proc. This was related to the scope type change described above.
10625 3) iASL Compiler/Disassembler
10627 Implemented the -g option to get all of the required ACPI tables
10628 from the registry and save them to files (Windows version of the
10629 compiler only.) The required tables are the FADT, FACS, and DSDT.
10631 Added ACPI table checksum validation during table disassembly in
10632 order to catch corrupted tables.
10635 ----------------------------------------
10636 22 October 2002. Summary of changes for version 20021022.
10638 1) ACPI CA Core Subsystem:
10640 Implemented a restriction on the Scope operator that the target
10641 must already exist in the namespace at the time the operator is
10642 encountered (during table load or method execution). In other
10643 words, forward references are not allowed and Scope() cannot
10644 create a new object. This changes the previous behavior where the
10645 interpreter would create the name if not found. This new behavior
10646 correctly enables the search-to-root algorithm during namespace
10647 lookup of the target name. Because of this upsearch, this fixes
10648 the known Compaq _SB_.OKEC problem and makes both the AML
10649 interpreter and iASL compiler compatible with other ACPI
10652 Completed a major overhaul of the internal ACPI object types for
10653 the ACPI Namespace and the associated operand objects. Many of
10654 these types had become obsolete with the introduction of the two-
10655 pass namespace load. This cleanup simplifies the code and makes
10656 the entire namespace load mechanism much clearer and easier to
10659 Improved debug output for tracking scope opening/closing to help
10660 diagnose scoping issues. The old scope name as well as the new
10661 scope name are displayed. Also improved error messages for
10662 problems with ASL Mutex objects and error messages for GPE
10665 Cleaned up the namespace dump code, removed obsolete code.
10667 All string output (for all namespace/object dumps) now uses the
10668 common ACPI string output procedure which handles escapes properly
10669 and does not emit non-printable characters.
10671 Fixed some issues with constants in the 64-bit version of the
10672 local C library (utclib.c)
10677 EC Driver: No longer attempts to acquire the Global Lock at
10681 3) iASL Compiler/Disassembler
10683 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
10684 2 opcodes outside of a control method. This means that the
10685 "executable" operators (versus the "namespace" operators) cannot
10686 be used at the table level; they can only be used within a control
10689 Implemented the restriction on the Scope() operator where the
10690 target must already exist in the namespace at the time the
10691 operator is encountered (during ASL compilation). In other words,
10692 forward references are not allowed and Scope() cannot create a new
10693 object. This makes the iASL compiler compatible with other ACPI
10694 implementations and makes the Scope() implementation adhere to the
10695 ACPI specification.
10697 Fixed a problem where namepath optimization for the Alias operator
10698 was optimizing the wrong path (of the two namepaths.) This caused
10699 a "Missing alias link" error message.
10701 Fixed a problem where an "unknown reserved name" warning could be
10702 incorrectly generated for names like "_SB" when the trailing
10703 underscore is not used in the original ASL.
10705 Fixed a problem where the reserved name check did not handle
10706 NamePaths with multiple NameSegs correctly. The first nameseg of
10707 the NamePath was examined instead of the last NameSeg.
10710 ----------------------------------------
10712 02 October 2002. Summary of changes for this release.
10715 1) ACPI CA Core Subsystem version 20021002:
10717 Fixed a problem where a store/copy of a string to an existing
10718 string did not always set the string length properly in the String
10721 Fixed a reported problem with the ToString operator where the
10722 behavior was identical to the ToHexString operator instead of just
10723 simply converting a raw buffer to a string data type.
10725 Fixed a problem where CopyObject and the other "explicit"
10726 conversion operators were not updating the internal namespace node
10727 type as part of the store operation.
10729 Fixed a memory leak during implicit source operand conversion
10730 where the original object was not deleted if it was converted to a
10731 new object of a different type.
10733 Enhanced error messages for all problems associated with namespace
10734 lookups. Common procedure generates and prints the lookup name as
10735 well as the formatted status.
10737 Completed implementation of a new design for the Alias support
10738 within the namespace. The existing design did not handle the case
10739 where a new object was assigned to one of the two names due to the
10740 use of an explicit conversion operator, resulting in the two names
10741 pointing to two different objects. The new design simply points
10742 the Alias name to the original name node - not to the object.
10743 This results in a level of indirection that must be handled in the
10744 name resolution mechanism.
10746 Code and Data Size: Current core subsystem library sizes are shown
10747 below. These are the code and data sizes for the acpica.lib
10748 produced by the Microsoft Visual C++ 6.0 compiler, and these
10749 values do not include any ACPI driver or OSPM code. The debug
10750 version of the code includes the debug output trace mechanism and
10751 has a larger code and data size. Note that these values will vary
10752 depending on the efficiency of the compiler and the compiler
10753 options used during generation.
10756 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
10757 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
10759 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
10760 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
10765 Initialize thermal driver's timer before it is used. (Knut
10768 Allow handling negative celsius values. (Kochi Takayoshi)
10770 Fix thermal management and make trip points. R/W (Pavel Machek)
10772 Fix /proc/acpi/sleep. (P. Christeas)
10774 IA64 fixes. (David Mosberger)
10776 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
10778 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
10782 3) iASL Compiler/Disassembler
10784 Clarified some warning/error messages.
10787 ----------------------------------------
10788 18 September 2002. Summary of changes for this release.
10791 1) ACPI CA Core Subsystem version 20020918:
10793 Fixed a reported problem with reference chaining (via the Index()
10794 and RefOf() operators) in the ObjectType() and SizeOf() operators.
10795 The definition of these operators includes the dereferencing of
10796 all chained references to return information on the base object.
10798 Fixed a problem with stores to indexed package elements - the
10799 existing code would not complete the store if an "implicit
10800 conversion" was not performed. In other words, if the existing
10801 object (package element) was to be replaced completely, the code
10802 didn't handle this case.
10804 Relaxed typechecking on the ASL "Scope" operator to allow the
10805 target name to refer to an object of type Integer, String, or
10806 Buffer, in addition to the scoping object types (Device,
10807 predefined Scopes, Processor, PowerResource, and ThermalZone.)
10808 This allows existing AML code that has workarounds for a bug in
10809 Windows to function properly. A warning is issued, however. This
10810 affects both the AML interpreter and the iASL compiler. Below is
10811 an example of this type of ASL code:
10817 Fixed some reported problems with 64-bit integer support in the
10818 local implementation of C library functions (clib.c)
10823 Use ACPI fix map region instead of IOAPIC region, since it is
10824 undefined in non-SMP.
10826 Ensure that the SCI has the proper polarity and trigger, even on
10827 systems that do not have an interrupt override entry in the MADT.
10829 2.5 big driver reorganization (Pat Mochel)
10831 Use early table mapping code from acpitable.c (Andi Kleen)
10833 New blacklist entries (Andi Kleen)
10835 Blacklist improvements. Split blacklist code out into a separate
10836 file. Move checking the blacklist to very early. Previously, we
10837 would use ACPI tables, and then halfway through init, check the
10838 blacklist -- too late. Now, it's early enough to completely fall-
10842 3) iASL Compiler/Disassembler version 20020918:
10844 Fixed a problem where the typechecking code didn't know that an
10845 alias could point to a method. In other words, aliases were not
10846 being dereferenced during typechecking.
10849 ----------------------------------------
10850 29 August 2002. Summary of changes for this release.
10852 1) ACPI CA Core Subsystem Version 20020829:
10854 If the target of a Scope() operator already exists, it must be an
10855 object type that actually opens a scope -- such as a Device,
10856 Method, Scope, etc. This is a fatal runtime error. Similar error
10857 check has been added to the iASL compiler also.
10859 Tightened up the namespace load to disallow multiple names in the
10860 same scope. This previously was allowed if both objects were of
10861 the same type. (i.e., a lookup was the same as entering a new
10867 Ensure that the ACPI interrupt has the proper trigger and
10870 local_irq_disable is extraneous. (Matthew Wilcox)
10872 Make "acpi=off" actually do what it says, and not use the ACPI
10873 interpreter *or* the tables.
10875 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
10879 3) iASL Compiler/Disassembler Version 20020829:
10881 Implemented namepath optimization for name declarations. For
10882 example, a declaration like "Method (\_SB_.ABCD)" would get
10883 optimized to "Method (ABCD)" if the declaration is within the
10884 \_SB_ scope. This optimization is in addition to the named
10885 reference path optimization first released in the previous
10886 version. This would seem to complete all possible optimizations
10887 for namepaths within the ASL/AML.
10889 If the target of a Scope() operator already exists, it must be an
10890 object type that actually opens a scope -- such as a Device,
10891 Method, Scope, etc.
10893 Implemented a check and warning for unreachable code in the same
10894 block below a Return() statement.
10896 Fixed a problem where the listing file was not generated if the
10897 compiler aborted if the maximum error count was exceeded (200).
10899 Fixed a problem where the typechecking of method return values was
10900 broken. This includes the check for a return value when the
10901 method is invoked as a TermArg (a return value is expected.)
10903 Fixed a reported problem where EOF conditions during a quoted
10904 string or comment caused a fault.
10907 ----------------------------------------
10908 15 August 2002. Summary of changes for this release.
10910 1) ACPI CA Core Subsystem Version 20020815:
10912 Fixed a reported problem where a Store to a method argument that
10913 contains a reference did not perform the indirect store correctly.
10914 This problem was created during the conversion to the new
10915 reference object model - the indirect store to a method argument
10916 code was not updated to reflect the new model.
10918 Reworked the ACPI mode change code to better conform to ACPI 2.0,
10919 handle corner cases, and improve code legibility (Kochi Takayoshi)
10921 Fixed a problem with the pathname parsing for the carat (^)
10922 prefix. The heavy use of the carat operator by the new namepath
10923 optimization in the iASL compiler uncovered a problem with the AML
10924 interpreter handling of this prefix. In the case where one or
10925 more carats precede a single nameseg, the nameseg was treated as
10926 standalone and the search rule (to root) was inadvertently
10927 applied. This could cause both the iASL compiler and the
10928 interpreter to find the wrong object or to miss the error that
10929 should occur if the object does not exist at that exact pathname.
10931 Found and fixed the problem where the HP Pavilion DSDT would not
10932 load. This was a relatively minor tweak to the table loading code
10933 (a problem caused by the unexpected encounter with a method
10934 invocation not within a control method), but it does not solve the
10935 overall issue of the execution of AML code at the table level.
10936 This investigation is still ongoing.
10938 Code and Data Size: Current core subsystem library sizes are shown
10939 below. These are the code and data sizes for the acpica.lib
10940 produced by the Microsoft Visual C++ 6.0 compiler, and these
10941 values do not include any ACPI driver or OSPM code. The debug
10942 version of the code includes the debug output trace mechanism and
10943 has a larger code and data size. Note that these values will vary
10944 depending on the efficiency of the compiler and the compiler
10945 options used during generation.
10948 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
10949 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
10951 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
10952 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
10957 Remove redundant slab.h include (Brad Hards)
10959 Fix several bugs in thermal.c (Herbert Nachtnebel)
10961 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
10963 Change acpi_system_suspend to use updated irq functions (Pavel
10966 Export acpi_get_firmware_table (Matthew Wilcox)
10968 Use proper root proc entry for ACPI (Kochi Takayoshi)
10970 Fix early-boot table parsing (Bjorn Helgaas)
10973 3) iASL Compiler/Disassembler
10975 Reworked the compiler options to make them more consistent and to
10976 use two-letter options where appropriate. We were running out of
10977 sensible letters. This may break some makefiles, so check the
10978 current options list by invoking the compiler with no parameters.
10980 Completed the design and implementation of the ASL namepath
10981 optimization option for the compiler. This option optimizes all
10982 references to named objects to the shortest possible path. The
10983 first attempt tries to utilize a single nameseg (4 characters) and
10984 the "search-to-root" algorithm used by the interpreter. If that
10985 cannot be used (because either the name is not in the search path
10986 or there is a conflict with another object with the same name),
10987 the pathname is optimized using the carat prefix (usually a
10988 shorter string than specifying the entire path from the root.)
10990 Implemented support to obtain the DSDT from the Windows registry
10991 (when the disassembly option is specified with no input file).
10992 Added this code as the implementation for AcpiOsTableOverride in
10993 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
10994 utility) to scan memory for the DSDT to the AcpiOsTableOverride
10995 function in the DOS OSL to make the disassembler truly OS
10998 Implemented a new option to disassemble and compile in one step.
10999 When used without an input filename, this option will grab the
11000 DSDT from the local machine, disassemble it, and compile it in one
11003 Added a warning message for invalid escapes (a backslash followed
11004 by any character other than the allowable escapes). This catches
11005 the quoted string error "\_SB_" (which should be "\\_SB_" ).
11007 Also, there are numerous instances in the ACPI specification where
11010 Added a compiler option to disable all optimizations. This is
11011 basically the "compatibility mode" because by using this option,
11012 the AML code will come out exactly the same as other ASL
11015 Added error messages for incorrectly ordered dependent resource
11016 functions. This includes: missing EndDependentFn macro at end of
11017 dependent resource list, nested dependent function macros (both
11018 start and end), and missing StartDependentFn macro. These are
11019 common errors that should be caught at compile time.
11021 Implemented _OSI support for the disassembler and compiler. _OSI
11022 must be included in the namespace for proper disassembly (because
11023 the disassembler must know the number of arguments.)
11025 Added an "optimization" message type that is optional (off by
11026 default). This message is used for all optimizations - including
11027 constant folding, integer optimization, and namepath optimization.
11029 ----------------------------------------
11030 25 July 2002. Summary of changes for this release.
11033 1) ACPI CA Core Subsystem Version 20020725:
11035 The AML Disassembler has been enhanced to produce compilable ASL
11036 code and has been integrated into the iASL compiler (see below) as
11037 well as the single-step disassembly for the AML debugger and the
11038 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
11039 resource templates and macros are fully supported. The
11040 disassembler has been tested on over 30 different AML files,
11041 producing identical AML when the resulting disassembled ASL file
11042 is recompiled with the same ASL compiler.
11044 Modified the Resource Manager to allow zero interrupts and zero
11045 dma channels during the GetCurrentResources call. This was
11046 causing problems on some platforms.
11048 Added the AcpiOsRedirectOutput interface to the OSL to simplify
11049 output redirection for the AcpiOsPrintf and AcpiOsVprintf
11052 Code and Data Size: Current core subsystem library sizes are shown
11053 below. These are the code and data sizes for the acpica.lib
11054 produced by the Microsoft Visual C++ 6.0 compiler, and these
11055 values do not include any ACPI driver or OSPM code. The debug
11056 version of the code includes the debug output trace mechanism and
11057 has a larger code and data size. Note that these values will vary
11058 depending on the efficiency of the compiler and the compiler
11059 options used during generation.
11062 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
11063 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
11065 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
11066 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
11071 Fixed a panic in the EC driver (Dominik Brodowski)
11073 Implemented checksum of the R/XSDT itself during Linux table scan
11079 The AML disassembler is integrated into the compiler. The "-d"
11080 option invokes the disassembler to completely disassemble an
11081 input AML file, producing as output a text ASL file with the
11082 extension ".dsl" (to avoid name collisions with existing .asl
11083 source files.) A future enhancement will allow the disassembler
11084 to obtain the BIOS DSDT from the registry under Windows.
11086 Fixed a problem with the VendorShort and VendorLong resource
11087 descriptors where an invalid AML sequence was created.
11089 Implemented a fix for BufferData term in the ASL parser. It was
11090 inadvertently defined twice, allowing invalid syntax to pass and
11091 causing reduction conflicts.
11093 Fixed a problem where the Ones opcode could get converted to a
11094 value of zero if "Ones" was used where a byte, word or dword value
11095 was expected. The 64-bit value is now truncated to the correct
11096 size with the correct value.
11100 ----------------------------------------
11101 02 July 2002. Summary of changes for this release.
11104 1) ACPI CA Core Subsystem Version 20020702:
11106 The Table Manager code has been restructured to add several new
11107 features. Tables that are not required by the core subsystem
11108 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
11109 validated in any way and are returned from AcpiGetFirmwareTable if
11110 requested. The AcpiOsTableOverride interface is now called for
11111 each table that is loaded by the subsystem in order to allow the
11112 host to override any table it chooses. Previously, only the DSDT
11113 could be overridden. Added one new files, tbrsdt.c and
11116 Fixed a problem with the conversion of internal package objects to
11117 external objects (when a package is returned from a control
11118 method.) The return buffer length was set to zero instead of the
11119 proper length of the package object.
11121 Fixed a reported problem with the use of the RefOf and DeRefOf
11122 operators when passing reference arguments to control methods. A
11123 new type of Reference object is used internally for references
11124 produced by the RefOf operator.
11126 Added additional error messages in the Resource Manager to explain
11127 AE_BAD_DATA errors when they occur during resource parsing.
11129 Split the AcpiEnableSubsystem into two primitives to enable a
11130 finer granularity initialization sequence. These two calls should
11131 be called in this order: AcpiEnableSubsystem (flags),
11132 AcpiInitializeObjects (flags). The flags parameter remains the
11138 Updated the ACPI utilities module to understand the new style of
11139 fully resolved package objects that are now returned from the core
11140 subsystem. This eliminates errors of the form:
11142 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
11143 acpi_utils-0430 [145] acpi_evaluate_reference:
11144 Invalid element in package (not a device reference)
11146 The method evaluation utility uses the new buffer allocation
11147 scheme instead of calling AcpiEvaluate Object twice.
11149 Added support for ECDT. This allows the use of the Embedded
11151 Controller before the namespace has been fully initialized, which
11152 is necessary for ACPI 2.0 support, and for some laptops to
11153 initialize properly. (Laptops using ECDT are still rare, so only
11154 limited testing was performed of the added functionality.)
11156 Fixed memory leaks in the EC driver.
11158 Eliminated a brittle code structure in acpi_bus_init().
11160 Eliminated the acpi_evaluate() helper function in utils.c. It is
11161 no longer needed since acpi_evaluate_object can optionally
11162 allocate memory for the return object.
11164 Implemented fix for keyboard hang when getting battery readings on
11165 some systems (Stephen White)
11167 PCI IRQ routing update (Dominik Brodowski)
11169 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
11172 ----------------------------------------
11173 11 June 2002. Summary of changes for this release.
11176 1) ACPI CA Core Subsystem Version 20020611:
11178 Fixed a reported problem where constants such as Zero and One
11179 appearing within _PRT packages were not handled correctly within
11180 the resource manager code. Originally reported against the ASL
11181 compiler because the code generator now optimizes integers to
11182 their minimal AML representation (i.e. AML constants if possible.)
11183 The _PRT code now handles all AML constant opcodes correctly
11184 (Zero, One, Ones, Revision).
11186 Fixed a problem with the Concatenate operator in the AML
11187 interpreter where a buffer result object was incorrectly marked as
11188 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
11190 All package sub-objects are now fully resolved before they are
11191 returned from the external ACPI interfaces. This means that name
11192 strings are resolved to object handles, and constant operators
11193 (Zero, One, Ones, Revision) are resolved to Integers.
11195 Implemented immediate resolution of the AML Constant opcodes
11196 (Zero, One, Ones, Revision) to Integer objects upon detection
11197 within the AML stream. This has simplified and reduced the
11198 generated code size of the subsystem by eliminating about 10
11199 switch statements for these constants (which previously were
11200 contained in Reference objects.) The complicating issues are that
11201 the Zero opcode is used as a "placeholder" for unspecified
11202 optional target operands and stores to constants are defined to be
11205 Code and Data Size: Current core subsystem library sizes are shown
11206 below. These are the code and data sizes for the acpica.lib
11207 produced by the Microsoft Visual C++ 6.0 compiler, and these
11208 values do not include any ACPI driver or OSPM code. The debug
11209 version of the code includes the debug output trace mechanism and
11210 has a larger code and data size. Note that these values will vary
11211 depending on the efficiency of the compiler and the compiler
11212 options used during generation.
11215 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
11216 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
11218 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
11219 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
11225 Added preliminary support for obtaining _TRA data for PCI root
11226 bridges (Bjorn Helgaas).
11229 3) iASL Compiler Version X2046:
11231 Fixed a problem where the "_DDN" reserved name was defined to be a
11232 control method with one argument. There are no arguments, and
11233 _DDN does not have to be a control method.
11235 Fixed a problem with the Linux version of the compiler where the
11236 source lines printed with error messages were the wrong lines.
11237 This turned out to be the "LF versus CR/LF" difference between
11238 Windows and Unix. This appears to be the longstanding issue
11239 concerning listing output and error messages.
11241 Fixed a problem with the Linux version of compiler where opcode
11242 names within error messages were wrong. This was caused by a
11243 slight difference in the output of the Flex tool on Linux versus
11246 Fixed a problem with the Linux compiler where the hex output files
11247 contained some garbage data caused by an internal buffer overrun.
11250 ----------------------------------------
11251 17 May 2002. Summary of changes for this release.
11254 1) ACPI CA Core Subsystem Version 20020517:
11256 Implemented a workaround to an BIOS bug discovered on the HP
11257 OmniBook where the FADT revision number and the table size are
11258 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
11259 behavior is to fallback to using only the ACPI 1.0 fields of the
11260 FADT if the table is too small to be a ACPI 2.0 table as claimed
11261 by the revision number. Although this is a BIOS bug, this is a
11262 case where the workaround is simple enough and with no side
11263 effects, so it seemed prudent to add it. A warning message is
11266 Implemented minimum size checks for the fixed-length ACPI tables -
11267 - the FADT and FACS, as well as consistency checks between the
11268 revision number and the table size.
11270 Fixed a reported problem in the table override support where the
11271 new table pointer was incorrectly treated as a physical address
11272 instead of a logical address.
11274 Eliminated the use of the AE_AML_ERROR exception and replaced it
11275 with more descriptive codes.
11277 Fixed a problem where an exception would occur if an ASL Field was
11278 defined with no named Field Units underneath it (used by some
11281 Code and Data Size: Current core subsystem library sizes are shown
11282 below. These are the code and data sizes for the acpica.lib
11283 produced by the Microsoft Visual C++ 6.0 compiler, and these
11284 values do not include any ACPI driver or OSPM code. The debug
11285 version of the code includes the debug output trace mechanism and
11286 has a larger code and data size. Note that these values will vary
11287 depending on the efficiency of the compiler and the compiler
11288 options used during generation.
11291 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
11292 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
11294 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
11295 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
11301 Much work done on ACPI init (MADT and PCI IRQ routing support).
11302 (Paul D. and Dominik Brodowski)
11304 Fix PCI IRQ-related panic on boot (Sam Revitch)
11306 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
11308 Fix "MHz" typo (Dominik Brodowski)
11310 Fix RTC year 2000 issue (Dominik Brodowski)
11312 Preclude multiple button proc entries (Eric Brunet)
11314 Moved arch-specific code out of include/platform/aclinux.h
11316 3) iASL Compiler Version X2044:
11318 Implemented error checking for the string used in the EISAID macro
11319 (Usually used in the definition of the _HID object.) The code now
11320 strictly enforces the PnP format - exactly 7 characters, 3
11321 uppercase letters and 4 hex digits.
11323 If a raw string is used in the definition of the _HID object
11324 (instead of the EISAID macro), the string must contain all
11325 alphanumeric characters (e.g., "*PNP0011" is not allowed because
11328 Implemented checking for invalid use of ACPI reserved names for
11329 most of the name creation operators (Name, Device, Event, Mutex,
11330 OperationRegion, PowerResource, Processor, and ThermalZone.)
11331 Previously, this check was only performed for control methods.
11333 Implemented an additional check on the Name operator to emit an
11334 error if a reserved name that must be implemented in ASL as a
11335 control method is used. We know that a reserved name must be a
11336 method if it is defined with input arguments.
11338 The warning emitted when a namespace object reference is not found
11339 during the cross reference phase has been changed into an error.
11340 The "External" directive should be used for names defined in other
11344 4) Tools and Utilities
11346 The 16-bit tools (adump16 and aexec16) have been regenerated and
11349 Fixed a problem with the output of both acpidump and adump16 where
11350 the indentation of closing parentheses and brackets was not
11352 aligned properly with the parent block.
11355 ----------------------------------------
11356 03 May 2002. Summary of changes for this release.
11359 1) ACPI CA Core Subsystem Version 20020503:
11361 Added support a new OSL interface that allows the host operating
11363 system software to override the DSDT found in the firmware -
11364 AcpiOsTableOverride. With this interface, the OSL can examine the
11365 version of the firmware DSDT and replace it with a different one
11368 Added new external interfaces for accessing ACPI registers from
11369 device drivers and other system software - AcpiGetRegister and
11370 AcpiSetRegister. This was simply an externalization of the
11371 existing AcpiHwBitRegister interfaces.
11373 Fixed a regression introduced in the previous build where the
11374 ASL/AML CreateField operator always returned an error,
11375 "destination must be a NS Node".
11377 Extended the maximum time (before failure) to successfully enable
11378 ACPI mode to 3 seconds.
11380 Code and Data Size: Current core subsystem library sizes are shown
11381 below. These are the code and data sizes for the acpica.lib
11382 produced by the Microsoft Visual C++ 6.0 compiler, and these
11383 values do not include any ACPI driver or OSPM code. The debug
11384 version of the code includes the debug output trace mechanism and
11385 has a larger code and data size. Note that these values will vary
11386 depending on the efficiency of the compiler and the compiler
11387 options used during generation.
11390 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
11391 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
11393 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
11394 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
11399 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
11400 free. While 3 out of 4 of our in-house systems work fine, the last
11401 one still hangs when testing the LAPIC timer.
11403 Renamed many files in 2.5 kernel release to omit "acpi_" from the
11406 Added warning on boot for Presario 711FR.
11408 Sleep improvements (Pavel Machek)
11410 ACPI can now be built without CONFIG_PCI enabled.
11412 IA64: Fixed memory map functions (JI Lee)
11415 3) iASL Compiler Version X2043:
11417 Added support to allow the compiler to be integrated into the MS
11418 VC++ development environment for one-button compilation of single
11419 files or entire projects -- with error-to-source-line mapping.
11421 Implemented support for compile-time constant folding for the
11422 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
11423 specification. This allows the ASL writer to use expressions
11424 instead of Integer/Buffer/String constants in terms that must
11425 evaluate to constants at compile time and will also simplify the
11426 emitted AML in any such sub-expressions that can be folded
11427 (evaluated at compile-time.) This increases the size of the
11428 compiler significantly because a portion of the ACPI CA AML
11429 interpreter is included within the compiler in order to pre-
11430 evaluate constant expressions.
11433 Fixed a problem with the "Unicode" ASL macro that caused the
11434 compiler to fault. (This macro is used in conjunction with the
11435 _STR reserved name.)
11437 Implemented an AML opcode optimization to use the Zero, One, and
11438 Ones opcodes where possible to further reduce the size of integer
11439 constants and thus reduce the overall size of the generated AML
11442 Implemented error checking for new reserved terms for ACPI version
11445 Implemented the -qr option to display the current list of ACPI
11446 reserved names known to the compiler.
11448 Implemented the -qc option to display the current list of ASL
11449 operators that are allowed within constant expressions and can
11450 therefore be folded at compile time if the operands are constants.
11455 Updated the Programmer's Reference for new interfaces, data types,
11456 and memory allocation model options.
11458 Updated the iASL Compiler User Reference to apply new format and
11459 add information about new features and options.
11461 ----------------------------------------
11462 19 April 2002. Summary of changes for this release.
11464 1) ACPI CA Core Subsystem Version 20020419:
11466 The source code base for the Core Subsystem has been completely
11467 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
11468 versions. The Lint option files used are included in the
11469 /acpi/generate/lint directory.
11471 Implemented enhanced status/error checking across the entire
11472 Hardware manager subsystem. Any hardware errors (reported from
11473 the OSL) are now bubbled up and will abort a running control
11477 Fixed a problem where the per-ACPI-table integer width (32 or 64)
11478 was stored only with control method nodes, causing a fault when
11479 non-control method code was executed during table loading. The
11480 solution implemented uses a global variable to indicate table
11481 width across the entire ACPI subsystem. Therefore, ACPI CA does
11482 not support mixed integer widths across different ACPI tables
11485 Fixed a problem where NULL extended fields (X fields) in an ACPI
11486 2.0 ACPI FADT caused the table load to fail. Although the
11487 existing ACPI specification is a bit fuzzy on this topic, the new
11488 behavior is to fall back on a ACPI 1.0 field if the corresponding
11489 ACPI 2.0 X field is zero (even though the table revision indicates
11490 a full ACPI 2.0 table.) The ACPI specification will be updated to
11491 clarify this issue.
11493 Fixed a problem with the SystemMemory operation region handler
11494 where memory was always accessed byte-wise even if the AML-
11495 specified access width was larger than a byte. This caused
11496 problems on systems with memory-mapped I/O. Memory is now
11497 accessed with the width specified. On systems that do not support
11498 non-aligned transfers, a check is made to guarantee proper address
11499 alignment before proceeding in order to avoid an AML-caused
11500 alignment fault within the kernel.
11503 Fixed a problem with the ExtendedIrq resource where only one byte
11504 of the 4-byte Irq field was extracted.
11506 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
11507 function was out of date and required a rewrite.
11509 Code and Data Size: Current core subsystem library sizes are shown
11510 below. These are the code and data sizes for the acpica.lib
11511 produced by the Microsoft Visual C++ 6.0 compiler, and these
11512 values do not include any ACPI driver or OSPM code. The debug
11513 version of the code includes the debug output trace mechanism and
11514 has a larger code and data size. Note that these values will vary
11515 depending on the efficiency of the compiler and the compiler
11516 options used during generation.
11519 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
11520 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
11522 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
11523 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
11528 PCI IRQ routing fixes (Dominik Brodowski)
11531 3) iASL Compiler Version X2042:
11533 Implemented an additional compile-time error check for a field
11534 unit whose size + minimum access width would cause a run-time
11535 access beyond the end-of-region. Previously, only the field size
11536 itself was checked.
11538 The Core subsystem and iASL compiler now share a common parse
11539 object in preparation for compile-time evaluation of the type
11540 3/4/5 ASL operators.
11543 ----------------------------------------
11544 Summary of changes for this release: 03_29_02
11546 1) ACPI CA Core Subsystem Version 20020329:
11548 Implemented support for late evaluation of TermArg operands to
11549 Buffer and Package objects. This allows complex expressions to be
11550 used in the declarations of these object types.
11552 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
11553 1.0, if the field was larger than 32 bits, it was returned as a
11554 buffer - otherwise it was returned as an integer. In ACPI 2.0,
11555 the field is returned as a buffer only if the field is larger than
11556 64 bits. The TableRevision is now considered when making this
11557 conversion to avoid incompatibility with existing ASL code.
11559 Implemented logical addressing for AcpiOsGetRootPointer. This
11560 allows an RSDP with either a logical or physical address. With
11561 this support, the host OS can now override all ACPI tables with
11562 one logical RSDP. Includes implementation of "typed" pointer
11563 support to allow a common data type for both physical and logical
11564 pointers internally. This required a change to the
11565 AcpiOsGetRootPointer interface.
11567 Implemented the use of ACPI 2.0 Generic Address Structures for all
11568 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
11569 mapped I/O for these ACPI features.
11571 Initialization now ignores not only non-required tables (All
11572 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
11573 not validate the table headers of unrecognized tables.
11575 Fixed a problem where a notify handler could only be
11576 installed/removed on an object of type Device. All "notify"
11578 objects are now supported -- Devices, Processor, Power, and
11581 Removed most verbosity from the ACPI_DB_INFO debug level. Only
11582 critical information is returned when this debug level is enabled.
11584 Code and Data Size: Current core subsystem library sizes are shown
11585 below. These are the code and data sizes for the acpica.lib
11586 produced by the Microsoft Visual C++ 6.0 compiler, and these
11587 values do not include any ACPI driver or OSPM code. The debug
11588 version of the code includes the debug output trace mechanism and
11589 has a larger code and data size. Note that these values will vary
11590 depending on the efficiency of the compiler and the compiler
11591 options used during generation.
11594 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
11595 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
11597 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
11598 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
11603 The processor driver (acpi_processor.c) now fully supports ACPI
11604 2.0-based processor performance control (e.g. Intel(R)
11605 SpeedStep(TM) technology) Note that older laptops that only have
11606 the Intel "applet" interface are not supported through this. The
11607 'limit' and 'performance' interface (/proc) are fully functional.
11608 [Note that basic policy for controlling performance state
11609 transitions will be included in the next version of ospmd.] The
11610 idle handler was modified to more aggressively use C2, and PIIX4
11611 errata handling underwent a complete overhaul (big thanks to
11612 Dominik Brodowski).
11614 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
11615 based devices in the ACPI namespace are now dynamically bound
11616 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
11617 This allows, among other things, ACPI to resolve bus numbers for
11618 subordinate PCI bridges.
11620 Enhanced PCI IRQ routing to get the proper bus number for _PRT
11621 entries defined underneath PCI bridges.
11623 Added IBM 600E to bad bios list due to invalid _ADR value for
11624 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
11626 In the process of adding full MADT support (e.g. IOAPIC) for IA32
11627 (acpi.c, mpparse.c) -- stay tuned.
11629 Added back visual differentiation between fixed-feature and
11630 control-method buttons in dmesg. Buttons are also subtyped (e.g.
11631 button/power/PWRF) to simplify button identification.
11633 We no longer use -Wno-unused when compiling debug. Please ignore
11634 any "_THIS_MODULE defined but not used" messages.
11636 Can now shut down the system using "magic sysrq" key.
11639 3) iASL Compiler version 2041:
11641 Fixed a problem where conversion errors for hex/octal/decimal
11642 constants were not reported.
11644 Implemented a fix for the General Register template Address field.
11645 This field was 8 bits when it should be 64.
11647 Fixed a problem where errors/warnings were no longer being emitted
11648 within the listing output file.
11650 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
11651 exactly 4 characters, alphanumeric only.
11656 ----------------------------------------
11657 Summary of changes for this release: 03_08_02
11660 1) ACPI CA Core Subsystem Version 20020308:
11662 Fixed a problem with AML Fields where the use of the "AccessAny"
11663 keyword could cause an interpreter error due to attempting to read
11664 or write beyond the end of the parent Operation Region.
11666 Fixed a problem in the SystemMemory Operation Region handler where
11667 an attempt was made to map memory beyond the end of the region.
11668 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
11669 errors on some Linux systems.
11671 Fixed a problem where the interpreter/namespace "search to root"
11672 algorithm was not functioning for some object types. Relaxed the
11673 internal restriction on the search to allow upsearches for all
11674 external object types as well as most internal types.
11679 We now use safe_halt() macro versus individual calls to sti | hlt.
11681 Writing to the processor limit interface should now work. "echo 1"
11682 will increase the limit, 2 will decrease, and 0 will reset to the
11689 Fixed segfault on Linux version.
11692 ----------------------------------------
11693 Summary of changes for this release: 02_25_02
11695 1) ACPI CA Core Subsystem:
11698 Fixed a problem where the GPE bit masks were not initialized
11699 properly, causing erratic GPE behavior.
11701 Implemented limited support for multiple calling conventions. The
11702 code can be generated with either the VPL (variable parameter
11703 list, or "C") convention, or the FPL (fixed parameter list, or
11704 "Pascal") convention. The core subsystem is about 3.4% smaller
11705 when generated with FPL.
11710 Re-add some /proc/acpi/event functionality that was lost during
11713 Resolved issue with /proc events for fixed-feature buttons showing
11714 up as the system device.
11716 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
11718 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
11720 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
11722 Fixed limit interface & usage to fix bugs with passive cooling
11725 Restructured PRT support.
11728 ----------------------------------------
11729 Summary of changes for this label: 02_14_02
11732 1) ACPI CA Core Subsystem:
11734 Implemented support in AcpiLoadTable to allow loading of FACS and
11737 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
11738 been removed. All 64-bit platforms should be migrated to the ACPI
11739 2.0 tables. The actbl71.h header has been removed from the source
11742 All C macros defined within the subsystem have been prefixed with
11743 "ACPI_" to avoid collision with other system include files.
11745 Removed the return value for the two AcpiOsPrint interfaces, since
11746 it is never used and causes lint warnings for ignoring the return
11749 Added error checking to all internal mutex acquire and release
11750 calls. Although a failure from one of these interfaces is
11751 probably a fatal system error, these checks will cause the
11752 immediate abort of the currently executing method or interface.
11754 Fixed a problem where the AcpiSetCurrentResources interface could
11755 fault. This was a side effect of the deployment of the new memory
11758 Fixed a couple of problems with the Global Lock support introduced
11759 in the last major build. The "common" (1.0/2.0) internal FACS was
11760 being overwritten with the FACS signature and clobbering the
11761 Global Lock pointer. Also, the actual firmware FACS was being
11762 unmapped after construction of the "common" FACS, preventing
11763 access to the actual Global Lock field within it. The "common"
11764 internal FACS is no longer installed as an actual ACPI table; it
11765 is used simply as a global.
11767 Code and Data Size: Current core subsystem library sizes are shown
11768 below. These are the code and data sizes for the acpica.lib
11769 produced by the Microsoft Visual C++ 6.0 compiler, and these
11770 values do not include any ACPI driver or OSPM code. The debug
11771 version of the code includes the debug output trace mechanism and
11772 has a larger code and data size. Note that these values will vary
11773 depending on the efficiency of the compiler and the compiler
11774 options used during generation.
11776 Previous Release (02_07_01)
11777 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
11778 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
11780 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
11781 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
11786 Updated Linux-specific code for core macro and OSL interface
11787 changes described above.
11789 Improved /proc/acpi/event. It now can be opened only once and has
11790 proper poll functionality.
11792 Fixed and restructured power management (acpi_bus).
11794 Only create /proc "view by type" when devices of that class exist.
11796 Fixed "charging/discharging" bug (and others) in acpi_battery.
11798 Improved thermal zone code.
11801 3) ASL Compiler, version X2039:
11804 Implemented the new compiler restriction on ASL String hex/octal
11805 escapes to non-null, ASCII values. An error results if an invalid
11806 value is used. (This will require an ACPI 2.0 specification
11809 AML object labels that are output to the optional C and ASM source
11810 are now prefixed with both the ACPI table signature and table ID
11811 to help guarantee uniqueness within a large BIOS project.
11814 ----------------------------------------
11815 Summary of changes for this label: 02_01_02
11817 1) ACPI CA Core Subsystem:
11819 ACPI 2.0 support is complete in the entire Core Subsystem and the
11820 ASL compiler. All new ACPI 2.0 operators are implemented and all
11821 other changes for ACPI 2.0 support are complete. With
11822 simultaneous code and data optimizations throughout the subsystem,
11823 ACPI 2.0 support has been implemented with almost no additional
11824 cost in terms of code and data size.
11826 Implemented a new mechanism for allocation of return buffers. If
11827 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
11828 be allocated on behalf of the caller. Consolidated all return
11829 buffer validation and allocation to a common procedure. Return
11830 buffers will be allocated via the primary OSL allocation interface
11831 since it appears that a separate pool is not needed by most users.
11832 If a separate pool is required for these buffers, the caller can
11833 still use the original mechanism and pre-allocate the buffer(s).
11835 Implemented support for string operands within the DerefOf
11838 Restructured the Hardware and Event managers to be table driven,
11839 simplifying the source code and reducing the amount of generated
11842 Split the common read/write low-level ACPI register bitfield
11843 procedure into a separate read and write, simplifying the code
11846 Obsoleted the AcpiOsCallocate OSL interface. This interface was
11847 used only a handful of times and didn't have enough critical mass
11848 for a separate interface. Replaced with a common calloc procedure
11851 Fixed a reported problem with the GPE number mapping mechanism
11852 that allows GPE1 numbers to be non-contiguous with GPE0.
11853 Reorganized the GPE information and shrunk a large array that was
11854 originally large enough to hold info for all possible GPEs (256)
11855 to simply large enough to hold all GPEs up to the largest GPE
11856 number on the machine.
11858 Fixed a reported problem with resource structure alignment on 64-
11861 Changed the AcpiEnableEvent and AcpiDisableEvent external
11862 interfaces to not require any flags for the common case of
11863 enabling/disabling a GPE.
11865 Implemented support to allow a "Notify" on a Processor object.
11867 Most TBDs in comments within the source code have been resolved
11871 Fixed a problem in the interpreter where a standalone parent
11872 prefix (^) was not handled correctly in the interpreter and
11875 Removed obsolete and unnecessary GPE save/restore code.
11877 Implemented Field support in the ASL Load operator. This allows a
11878 table to be loaded from a named field, in addition to loading a
11879 table directly from an Operation Region.
11881 Implemented timeout and handle support in the external Global Lock
11884 Fixed a problem in the AcpiDump utility where pathnames were no
11885 longer being generated correctly during the dump of named objects.
11887 Modified the AML debugger to give a full display of if/while
11888 predicates instead of just one AML opcode at a time. (The
11889 predicate can have several nested ASL statements.) The old method
11890 was confusing during single stepping.
11892 Code and Data Size: Current core subsystem library sizes are shown
11893 below. These are the code and data sizes for the acpica.lib
11894 produced by the Microsoft Visual C++ 6.0 compiler, and these
11895 values do not include any ACPI driver or OSPM code. The debug
11896 version of the code includes the debug output trace mechanism and
11897 has a larger code and data size. Note that these values will vary
11898 depending on the efficiency of the compiler and the compiler
11899 options used during generation.
11901 Previous Release (12_18_01)
11902 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
11903 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
11905 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
11906 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
11910 Implemented fix for PIIX reverse throttling errata (Processor
11913 Added new Limit interface (Processor and Thermal drivers)
11915 New thermal policy (Thermal driver)
11917 Many updates to /proc
11919 Battery "low" event support (Battery driver)
11921 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
11923 IA32 - IA64 initialization unification, no longer experimental
11925 Menuconfig options redesigned
11927 3) ASL Compiler, version X2037:
11929 Implemented several new output features to simplify integration of
11930 AML code into firmware: 1) Output the AML in C source code with
11931 labels for each named ASL object. The original ASL source code
11932 is interleaved as C comments. 2) Output the AML in ASM source code
11933 with labels and interleaved ASL source. 3) Output the AML in
11934 raw hex table form, in either C or ASM.
11936 Implemented support for optional string parameters to the
11937 LoadTable operator.
11939 Completed support for embedded escape sequences within string
11940 literals. The compiler now supports all single character escapes
11941 as well as the Octal and Hex escapes. Note: the insertion of a
11942 null byte into a string literal (via the hex/octal escape) causes
11943 the string to be immediately terminated. A warning is issued.
11945 Fixed a problem where incorrect AML was generated for the case
11946 where an ASL namepath consists of a single parent prefix (
11948 ) with no trailing name segments.
11950 The compiler has been successfully generated with a 64-bit C
11956 ----------------------------------------
11957 Summary of changes for this label: 12_18_01
11961 Enhanced blacklist with reason and severity fields. Any table's
11962 signature may now be used to identify a blacklisted system.
11964 Call _PIC control method to inform the firmware which interrupt
11965 model the OS is using. Turn on any disabled link devices.
11967 Cleaned up busmgr /proc error handling (Andreas Dilger)
11969 2) ACPI CA Core Subsystem:
11971 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
11974 Completed implementation of the ACPI 2.0 "Continue",
11975 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
11976 operators. All new ACPI 2.0 operators are now implemented in both
11977 the ASL compiler and the AML interpreter. The only remaining ACPI
11978 2.0 task is support for the String data type in the DerefOf
11979 operator. Fixed a problem with AcquireMutex where the status code
11980 was lost if the caller had to actually wait for the mutex.
11982 Increased the maximum ASL Field size from 64K bits to 4G bits.
11984 Completed implementation of the external Global Lock interfaces --
11985 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
11986 Handler parameters were added.
11988 Completed another pass at removing warnings and issues when
11989 compiling with 64-bit compilers. The code now compiles cleanly
11990 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
11991 add and subtract (diff) macros have changed considerably.
11994 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
11995 64-bit platforms, 32-bits on all others. This type is used
11996 wherever memory allocation and/or the C sizeof() operator is used,
11997 and affects the OSL memory allocation interfaces AcpiOsAllocate
11998 and AcpiOsCallocate.
12000 Implemented sticky user breakpoints in the AML debugger.
12002 Code and Data Size: Current core subsystem library sizes are shown
12003 below. These are the code and data sizes for the acpica.lib
12004 produced by the Microsoft Visual C++ 6.0 compiler, and these
12005 values do not include any ACPI driver or OSPM code. The debug
12006 version of the code includes the debug output trace mechanism and
12007 has a larger code and data size. Note that these values will vary
12008 depending on the efficiency of the compiler and the compiler
12009 options used during generation.
12011 Previous Release (12_05_01)
12012 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
12013 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
12015 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
12016 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
12018 3) ASL Compiler, version X2034:
12020 Now checks for (and generates an error if detected) the use of a
12021 Break or Continue statement without an enclosing While statement.
12024 Successfully generated the compiler with the Intel 64-bit C
12027 ----------------------------------------
12028 Summary of changes for this label: 12_05_01
12030 1) ACPI CA Core Subsystem:
12032 The ACPI 2.0 CopyObject operator is fully implemented. This
12033 operator creates a new copy of an object (and is also used to
12034 bypass the "implicit conversion" mechanism of the Store operator.)
12036 The ACPI 2.0 semantics for the SizeOf operator are fully
12037 implemented. The change is that performing a SizeOf on a
12038 reference object causes an automatic dereference of the object to
12039 tha actual value before the size is evaluated. This behavior was
12040 undefined in ACPI 1.0.
12042 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
12043 have been implemented. The interrupt polarity and mode are now
12046 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
12047 appearing in Package objects were not properly converted to
12048 integers when the internal Package was converted to an external
12049 object (via the AcpiEvaluateObject interface.)
12051 Fixed a problem with the namespace object deletion mechanism for
12052 objects created by control methods. There were two parts to this
12053 problem: 1) Objects created during the initialization phase method
12054 parse were not being deleted, and 2) The object owner ID mechanism
12055 to track objects was broken.
12057 Fixed a problem where the use of the ASL Scope operator within a
12058 control method would result in an invalid opcode exception.
12060 Fixed a problem introduced in the previous label where the buffer
12061 length required for the _PRT structure was not being returned
12064 Code and Data Size: Current core subsystem library sizes are shown
12065 below. These are the code and data sizes for the acpica.lib
12066 produced by the Microsoft Visual C++ 6.0 compiler, and these
12067 values do not include any ACPI driver or OSPM code. The debug
12068 version of the code includes the debug output trace mechanism and
12069 has a larger code and data size. Note that these values will vary
12070 depending on the efficiency of the compiler and the compiler
12071 options used during generation.
12073 Previous Release (11_20_01)
12074 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
12075 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
12078 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
12079 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
12083 Updated all files to apply cleanly against 2.4.16.
12085 Added basic PCI Interrupt Routing Table (PRT) support for IA32
12086 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
12087 version supports both static and dyanmic PRT entries, but dynamic
12088 entries are treated as if they were static (not yet
12089 reconfigurable). Architecture- specific code to use this data is
12090 absent on IA32 but should be available shortly.
12092 Changed the initialization sequence to start the ACPI interpreter
12093 (acpi_init) prior to initialization of the PCI driver (pci_init)
12094 in init/main.c. This ordering is required to support PRT and
12095 facilitate other (future) enhancement. A side effect is that the
12096 ACPI bus driver and certain device drivers can no longer be loaded
12099 Modified the 'make menuconfig' options to allow PCI Interrupt
12100 Routing support to be included without the ACPI Bus and other
12103 3) ASL Compiler, version X2033:
12105 Fixed some issues with the use of the new CopyObject and
12106 DataTableRegion operators. Both are fully functional.
12108 ----------------------------------------
12109 Summary of changes for this label: 11_20_01
12111 20 November 2001. Summary of changes for this release.
12113 1) ACPI CA Core Subsystem:
12115 Updated Index support to match ACPI 2.0 semantics. Storing a
12116 Integer, String, or Buffer to an Index of a Buffer will store only
12117 the least-significant byte of the source to the Indexed buffer
12118 byte. Multiple writes are not performed.
12120 Fixed a problem where the access type used in an AccessAs ASL
12121 operator was not recorded correctly into the field object.
12123 Fixed a problem where ASL Event objects were created in a
12124 signalled state. Events are now created in an unsignalled state.
12126 The internal object cache is now purged after table loading and
12127 initialization to reduce the use of dynamic kernel memory -- on
12128 the assumption that object use is greatest during the parse phase
12129 of the entire table (versus the run-time use of individual control
12132 ACPI 2.0 variable-length packages are now fully operational.
12134 Code and Data Size: Code and Data optimizations have permitted new
12135 feature development with an actual reduction in the library size.
12136 Current core subsystem library sizes are shown below. These are
12137 the code and data sizes for the acpica.lib produced by the
12138 Microsoft Visual C++ 6.0 compiler, and these values do not include
12139 any ACPI driver or OSPM code. The debug version of the code
12140 includes the debug output trace mechanism and has a larger code
12141 and data size. Note that these values will vary depending on the
12142 efficiency of the compiler and the compiler options used during
12145 Previous Release (11_09_01):
12146 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
12147 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
12150 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
12151 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
12155 Enhanced the ACPI boot-time initialization code to allow the use
12156 of Local APIC tables for processor enumeration on IA-32, and to
12157 pave the way for a fully MPS-free boot (on SMP systems) in the
12158 near future. This functionality replaces
12159 arch/i386/kernel/acpitables.c, which was introduced in an earlier
12160 2.4.15-preX release. To enable this feature you must add
12161 "acpi_boot=on" to the kernel command line -- see the help entry
12162 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
12165 Restructured the configuration options to allow boot-time table
12166 parsing support without inclusion of the ACPI Interpreter (and
12169 NOTE: This release does not include fixes for the reported events,
12170 power-down, and thermal passive cooling issues (coming soon).
12174 Added additional typechecking for Fields within restricted access
12175 Operation Regions. All fields within EC and CMOS regions must be
12176 declared with ByteAcc. All fields withing SMBus regions must be
12177 declared with the BufferAcc access type.
12179 Fixed a problem where the listing file output of control methods
12180 no longer interleaved the actual AML code with the ASL source
12186 ----------------------------------------
12187 Summary of changes for this label: 11_09_01
12189 1) ACPI CA Core Subsystem:
12191 Implemented ACPI 2.0-defined support for writes to fields with a
12192 Buffer, String, or Integer source operand that is smaller than the
12193 target field. In these cases, the source operand is zero-extended
12194 to fill the target field.
12196 Fixed a problem where a Field starting bit offset (within the
12197 parent operation region) was calculated incorrectly if the
12199 alignment of the field differed from the access width. This
12200 affected CreateWordField, CreateDwordField, CreateQwordField, and
12201 possibly other fields that use the "AccessAny" keyword.
12203 Fixed a problem introduced in the 11_02_01 release where indirect
12204 stores through method arguments did not operate correctly.
12208 Implemented boot-time ACPI table parsing support
12209 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
12210 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
12211 legacy BIOS interfaces (e.g. MPS) for the configuration of system
12212 processors, memory, and interrupts during setup_arch(). Note that
12213 this patch does not include the required architecture-specific
12214 changes required to apply this information -- subsequent patches
12215 will be posted for both IA32 and IA64 to achieve this.
12217 Added low-level sleep support for IA32 platforms, courtesy of Pat
12218 Mochel. This allows IA32 systems to transition to/from various
12219 sleeping states (e.g. S1, S3), although the lack of a centralized
12220 driver model and power-manageable drivers will prevent its
12221 (successful) use on most systems.
12223 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
12224 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
12225 tables" option, etc.
12227 Increased the default timeout for the EC driver from 1ms to 10ms
12228 (1000 cycles of 10us) to try to address AE_TIME errors during EC
12231 ----------------------------------------
12232 Summary of changes for this label: 11_02_01
12234 1) ACPI CA Core Subsystem:
12236 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
12237 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
12240 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
12241 changes to support ACPI 2.0 Qword field access. Read/Write
12242 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
12243 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
12244 the value parameter for the address space handler interface is now
12245 an ACPI_INTEGER. OSL implementations of these interfaces must now
12246 handle the case where the Width parameter is 64.
12248 Index Fields: Fixed a problem where unaligned bit assembly and
12249 disassembly for IndexFields was not supported correctly.
12251 Index and Bank Fields: Nested Index and Bank Fields are now
12252 supported. During field access, a check is performed to ensure
12253 that the value written to an Index or Bank register is not out of
12254 the range of the register. The Index (or Bank) register is
12255 written before each access to the field data. Future support will
12256 include allowing individual IndexFields to be wider than the
12257 DataRegister width.
12259 Fields: Fixed a problem where the AML interpreter was incorrectly
12260 attempting to write beyond the end of a Field/OpRegion. This was
12261 a boundary case that occurred when a DWORD field was written to a
12262 BYTE access OpRegion, forcing multiple writes and causing the
12263 interpreter to write one datum too many.
12265 Fields: Fixed a problem with Field/OpRegion access where the
12266 starting bit address of a field was incorrectly calculated if the
12267 current access type was wider than a byte (WordAcc, DwordAcc, or
12270 Fields: Fixed a problem where forward references to individual
12271 FieldUnits (individual Field names within a Field definition) were
12272 not resolved during the AML table load.
12274 Fields: Fixed a problem where forward references from a Field
12275 definition to the parent Operation Region definition were not
12276 resolved during the AML table load.
12278 Fields: Duplicate FieldUnit names within a scope are now detected
12279 during AML table load.
12281 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
12282 returned an incorrect name for the root node.
12284 Code and Data Size: Code and Data optimizations have permitted new
12285 feature development with an actual reduction in the library size.
12286 Current core subsystem library sizes are shown below. These are
12287 the code and data sizes for the acpica.lib produced by the
12288 Microsoft Visual C++ 6.0 compiler, and these values do not include
12289 any ACPI driver or OSPM code. The debug version of the code
12290 includes the debug output trace mechanism and has a larger code
12291 and data size. Note that these values will vary depending on the
12292 efficiency of the compiler and the compiler options used during
12295 Previous Release (10_18_01):
12296 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
12297 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
12300 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
12301 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
12305 Improved /proc processor output (Pavel Machek) Re-added
12306 MODULE_LICENSE("GPL") to all modules.
12308 3) ASL Compiler version X2030:
12310 Duplicate FieldUnit names within a scope are now detected and
12315 Programmer Reference updated to reflect OSL and address space
12316 handler interface changes described above.
12318 ----------------------------------------
12319 Summary of changes for this label: 10_18_01
12321 ACPI CA Core Subsystem:
12323 Fixed a problem with the internal object reference count mechanism
12324 that occasionally caused premature object deletion. This resolves
12325 all of the outstanding problem reports where an object is deleted
12326 in the middle of an interpreter evaluation. Although this problem
12327 only showed up in rather obscure cases, the solution to the
12328 problem involved an adjustment of all reference counts involving
12329 objects attached to namespace nodes.
12331 Fixed a problem with Field support in the interpreter where
12332 writing to an aligned field whose length is an exact multiple (2
12333 or greater) of the field access granularity would cause an attempt
12334 to write beyond the end of the field.
12336 The top level AML opcode execution functions within the
12337 interpreter have been renamed with a more meaningful and
12338 consistent naming convention. The modules exmonad.c and
12339 exdyadic.c were eliminated. New modules are exoparg1.c,
12340 exoparg2.c, exoparg3.c, and exoparg6.c.
12342 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
12344 Fixed a problem where the AML debugger was causing some internal
12345 objects to not be deleted during subsystem termination.
12347 Fixed a problem with the external AcpiEvaluateObject interface
12348 where the subsystem would fault if the named object to be
12349 evaluated refered to a constant such as Zero, Ones, etc.
12351 Fixed a problem with IndexFields and BankFields where the
12352 subsystem would fault if the index, data, or bank registers were
12353 not defined in the same scope as the field itself.
12355 Added printf format string checking for compilers that support
12356 this feature. Corrected more than 50 instances of issues with
12357 format specifiers within invocations of ACPI_DEBUG_PRINT
12358 throughout the core subsystem code.
12360 The ASL "Revision" operator now returns the ACPI support level
12361 implemented in the core - the value "2" since the ACPI 2.0 support
12362 is more than 50% implemented.
12364 Enhanced the output of the AML debugger "dump namespace" command
12365 to output in a more human-readable form.
12367 Current core subsystem library code sizes are shown below. These
12369 are the code and data sizes for the acpica.lib produced by the
12370 Microsoft Visual C++ 6.0 compiler, and these values do not include
12371 any ACPI driver or OSPM code. The debug version of the code
12372 includes the full debug trace mechanism -- leading to a much
12374 larger code and data size. Note that these values will vary
12375 depending on the efficiency of the compiler and the compiler
12376 options used during generation.
12378 Previous Label (09_20_01):
12379 Non-Debug Version: 65K Code, 5K Data, 70K Total
12380 Debug Version: 138K Code, 58K Data, 196K Total
12384 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
12385 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
12389 Implemented a "Bad BIOS Blacklist" to track machines that have
12390 known ASL/AML problems.
12392 Enhanced the /proc interface for the thermal zone driver and added
12393 support for _HOT (the critical suspend trip point). The 'info'
12394 file now includes threshold/policy information, and allows setting
12395 of _SCP (cooling preference) and _TZP (polling frequency) values
12396 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
12397 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
12398 preference to the passive/quiet mode (if supported by the ASL).
12400 Implemented a workaround for a gcc bug that resuted in an OOPs
12401 when loading the control method battery driver.
12403 ----------------------------------------
12404 Summary of changes for this label: 09_20_01
12406 ACPI CA Core Subsystem:
12408 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
12409 modified to allow individual GPE levels to be flagged as wake-
12410 enabled (i.e., these GPEs are to remain enabled when the platform
12413 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
12414 support wake-enabled GPEs. This means that upon entering the
12415 sleep state, all GPEs that are not wake-enabled are disabled.
12416 When leaving the sleep state, these GPEs are reenabled.
12418 A local double-precision divide/modulo module has been added to
12419 enhance portability to OS kernels where a 64-bit math library is
12420 not available. The new module is "utmath.c".
12422 Several optimizations have been made to reduce the use of CPU
12423 stack. Originally over 2K, the maximum stack usage is now below
12424 2K at 1860 bytes (1.82k)
12426 Fixed a problem with the AcpiGetFirmwareTable interface where the
12427 root table pointer was not mapped into a logical address properly.
12429 Fixed a problem where a NULL pointer was being dereferenced in the
12430 interpreter code for the ASL Notify operator.
12432 Fixed a problem where the use of the ASL Revision operator
12433 returned an error. This operator now returns the current version
12434 of the ACPI CA core subsystem.
12436 Fixed a problem where objects passed as control method parameters
12437 to AcpiEvaluateObject were always deleted at method termination.
12438 However, these objects may end up being stored into the namespace
12439 by the called method. The object reference count mechanism was
12440 applied to these objects instead of a force delete.
12442 Fixed a problem where static strings or buffers (contained in the
12443 AML code) that are declared as package elements within the ASL
12444 code could cause a fault because the interpreter would attempt to
12445 delete them. These objects are now marked with the "static
12446 object" flag to prevent any attempt to delete them.
12448 Implemented an interpreter optimization to use operands directly
12449 from the state object instead of extracting the operands to local
12450 variables. This reduces stack use and code size, and improves
12453 The module exxface.c was eliminated as it was an unnecessary extra
12456 Current core subsystem library code sizes are shown below. These
12457 are the code and data sizes for the acpica.lib produced by the
12458 Microsoft Visual C++ 6.0 compiler, and these values do not include
12459 any ACPI driver or OSPM code. The debug version of the code
12460 includes the full debug trace mechanism -- leading to a much
12461 larger code and data size. Note that these values will vary
12462 depending on the efficiency of the compiler and the compiler
12463 options used during generation.
12465 Non-Debug Version: 65K Code, 5K Data, 70K Total
12466 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
12467 Total (Previously 195K)
12471 Support for ACPI 2.0 64-bit integers has been added. All ACPI
12472 Integer objects are now 64 bits wide
12474 All Acpi data types and structures are now in lower case. Only
12475 Acpi macros are upper case for differentiation.
12479 Changes to the external interfaces as described above.
12481 ----------------------------------------
12482 Summary of changes for this label: 08_31_01
12484 ACPI CA Core Subsystem:
12486 A bug with interpreter implementation of the ASL Divide operator
12487 was found and fixed. The implicit function return value (not the
12488 explicit store operands) was returning the remainder instead of
12489 the quotient. This was a longstanding bug and it fixes several
12490 known outstanding issues on various platforms.
12492 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
12493 been further optimized for size. There are 700 invocations of the
12494 DEBUG_PRINT macro alone, so each optimization reduces the size of
12495 the debug version of the subsystem significantly.
12497 A stack trace mechanism has been implemented. The maximum stack
12498 usage is about 2K on 32-bit platforms. The debugger command "stat
12499 stack" will display the current maximum stack usage.
12501 All public symbols and global variables within the subsystem are
12502 now prefixed with the string "Acpi". This keeps all of the
12503 symbols grouped together in a kernel map, and avoids conflicts
12504 with other kernel subsystems.
12506 Most of the internal fixed lookup tables have been moved into the
12507 code segment via the const operator.
12509 Several enhancements have been made to the interpreter to both
12510 reduce the code size and improve performance.
12512 Current core subsystem library code sizes are shown below. These
12513 are the code and data sizes for the acpica.lib produced by the
12514 Microsoft Visual C++ 6.0 compiler, and these values do not include
12515 any ACPI driver or OSPM code. The debug version of the code
12516 includes the full debug trace mechanism which contains over 700
12517 invocations of the DEBUG_PRINT macro, 500 function entry macro
12518 invocations, and over 900 function exit macro invocations --
12519 leading to a much larger code and data size. Note that these
12520 values will vary depending on the efficiency of the compiler and
12521 the compiler options used during generation.
12523 Non-Debug Version: 64K Code, 5K Data, 69K Total
12524 Debug Version: 137K Code, 58K Data, 195K Total
12528 Implemented wbinvd() macro, pending a kernel-wide definition.
12530 Fixed /proc/acpi/event to handle poll() and short reads.
12532 ASL Compiler, version X2026:
12534 Fixed a problem introduced in the previous label where the AML
12536 code emitted for package objects produced packages with zero
12539 ----------------------------------------
12540 Summary of changes for this label: 08_16_01
12542 ACPI CA Core Subsystem:
12544 The following ACPI 2.0 ASL operators have been implemented in the
12545 AML interpreter (These are already supported by the Intel ASL
12546 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
12547 ToBuffer. Support for 64-bit AML constants is implemented in the
12548 AML parser, debugger, and disassembler.
12550 The internal memory tracking mechanism (leak detection code) has
12551 been upgraded to reduce the memory overhead (a separate tracking
12552 block is no longer allocated for each memory allocation), and now
12553 supports all of the internal object caches.
12555 The data structures and code for the internal object caches have
12556 been coelesced and optimized so that there is a single cache and
12557 memory list data structure and a single group of functions that
12558 implement generic cache management. This has reduced the code
12559 size in both the debug and release versions of the subsystem.
12561 The DEBUG_PRINT macro(s) have been optimized for size and replaced
12562 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
12563 different, because it generates a single call to an internal
12564 function. This results in a savings of about 90 bytes per
12565 invocation, resulting in an overall code and data savings of about
12566 16% in the debug version of the subsystem.
12570 Fixed C3 disk corruption problems and re-enabled C3 on supporting
12573 Integrated low-level sleep code by Patrick Mochel.
12575 Further tweaked source code Linuxization.
12581 Support for ACPI 2.0 variable length packages is fixed/completed.
12583 Fixed a problem where the optional length parameter for the ACPI
12584 2.0 ToString operator.
12586 Fixed multiple extraneous error messages when a syntax error is
12587 detected within the declaration line of a control method.
12589 ----------------------------------------
12590 Summary of changes for this label: 07_17_01
12592 ACPI CA Core Subsystem:
12594 Added a new interface named AcpiGetFirmwareTable to obtain any
12595 ACPI table via the ACPI signature. The interface can be called at
12596 any time during kernel initialization, even before the kernel
12597 virtual memory manager is initialized and paging is enabled. This
12598 allows kernel subsystems to obtain ACPI tables very early, even
12599 before the ACPI CA subsystem is initialized.
12601 Fixed a problem where Fields defined with the AnyAcc attribute
12602 could be resolved to the incorrect address under the following
12603 conditions: 1) the field width is larger than 8 bits and 2) the
12604 parent operation region is not defined on a DWORD boundary.
12606 Fixed a problem where the interpreter is not being locked during
12607 namespace initialization (during execution of the _INI control
12608 methods), causing an error when an attempt is made to release it
12611 ACPI 2.0 support in the AML Interpreter has begun and will be
12612 ongoing throughout the rest of this year. In this label, The Mod
12613 operator is implemented.
12615 Added a new data type to contain full PCI addresses named
12616 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
12617 and Function values.
12621 Enhanced the Linux version of the source code to change most
12622 capitalized ACPI type names to lowercase. For example, all
12623 instances of ACPI_STATUS are changed to acpi_status. This will
12624 result in a large diff, but the change is strictly cosmetic and
12625 aligns the CA code closer to the Linux coding standard.
12629 The interfaces to the PCI configuration space have been changed to
12630 add the PCI Segment number and to split the single 32-bit combined
12631 DeviceFunction field into two 16-bit fields. This was
12632 accomplished by moving the four values that define an address in
12633 PCI configuration space (segment, bus, device, and function) to
12634 the new ACPI_PCI_ID structure.
12636 The changes to the PCI configuration space interfaces led to a
12637 reexamination of the complete set of address space access
12638 interfaces for PCI, I/O, and Memory. The previously existing 18
12639 interfaces have proven difficult to maintain (any small change
12640 must be propagated across at least 6 interfaces) and do not easily
12641 allow for future expansion to 64 bits if necessary. Also, on some
12642 systems, it would not be appropriate to demultiplex the access
12643 width (8, 16, 32,or 64) before calling the OSL if the
12644 corresponding native OS interfaces contain a similar access width
12645 parameter. For these reasons, the 18 address space interfaces
12646 have been replaced by these 6 new ones:
12648 AcpiOsReadPciConfiguration
12649 AcpiOsWritePciConfiguration
12655 Added a new interface named AcpiOsGetRootPointer to allow the OSL
12656 to perform the platform and/or OS-specific actions necessary to
12657 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
12658 interface will simply call down to the CA core to perform the low-
12659 memory search for the table. On IA-64, the RSDP is obtained from
12660 EFI. Migrating this interface to the OSL allows the CA core to
12662 remain OS and platform independent.
12664 Added a new interface named AcpiOsSignal to provide a generic
12665 "function code and pointer" interface for various miscellaneous
12666 signals and notifications that must be made to the host OS. The
12667 first such signals are intended to support the ASL Fatal and
12668 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
12669 interface has been obsoleted.
12671 The definition of the AcpiFormatException interface has been
12672 changed to simplify its use. The caller no longer must supply a
12673 buffer to the call; A pointer to a const string is now returned
12674 directly. This allows the call to be easily used in printf
12675 statements, etc. since the caller does not have to manage a local
12679 ASL Compiler, Version X2025:
12681 The ACPI 2.0 Switch/Case/Default operators have been implemented
12682 and are fully functional. They will work with all ACPI 1.0
12683 interpreters, since the operators are simply translated to If/Else
12686 The ACPI 2.0 ElseIf operator is implemented and will also work
12687 with 1.0 interpreters, for the same reason.
12689 Implemented support for ACPI 2.0 variable-length packages. These
12690 packages have a separate opcode, and their size is determined by
12691 the interpreter at run-time.
12693 Documentation The ACPI CA Programmer Reference has been updated to
12694 reflect the new interfaces and changes to existing interfaces.
12696 ------------------------------------------
12697 Summary of changes for this label: 06_15_01
12699 ACPI CA Core Subsystem:
12701 Fixed a problem where a DWORD-accessed field within a Buffer
12702 object would get its byte address inadvertently rounded down to
12703 the nearest DWORD. Buffers are always Byte-accessible.
12705 ASL Compiler, version X2024:
12707 Fixed a problem where the Switch() operator would either fault or
12708 hang the compiler. Note however, that the AML code for this ACPI
12709 2.0 operator is not yet implemented.
12711 Compiler uses the new AcpiOsGetTimer interface to obtain compile
12714 Implementation of the CreateField operator automatically converts
12715 a reference to a named field within a resource descriptor from a
12716 byte offset to a bit offset if required.
12718 Added some missing named fields from the resource descriptor
12719 support. These are the names that are automatically created by the
12720 compiler to reference fields within a descriptor. They are only
12721 valid at compile time and are not passed through to the AML
12724 Resource descriptor named fields are now typed as Integers and
12725 subject to compile-time typechecking when used in expressions.
12727 ------------------------------------------
12728 Summary of changes for this label: 05_18_01
12730 ACPI CA Core Subsystem:
12732 Fixed a couple of problems in the Field support code where bits
12733 from adjacent fields could be returned along with the proper field
12734 bits. Restructured the field support code to improve performance,
12735 readability and maintainability.
12737 New DEBUG_PRINTP macro automatically inserts the procedure name
12738 into the output, saving hundreds of copies of procedure name
12739 strings within the source, shrinking the memory footprint of the
12740 debug version of the core subsystem.
12742 Source Code Structure:
12744 The source code directory tree was restructured to reflect the
12745 current organization of the component architecture. Some files
12746 and directories have been moved and/or renamed.
12750 Fixed leaking kacpidpc processes.
12752 Fixed queueing event data even when /proc/acpi/event is not
12755 ASL Compiler, version X2020:
12757 Memory allocation performance enhancement - over 24X compile time
12758 improvement on large ASL files. Parse nodes and namestring
12759 buffers are now allocated from a large internal compiler buffer.
12761 The temporary .SRC file is deleted unless the "-s" option is
12764 The "-d" debug output option now sends all output to the .DBG file
12765 instead of the console.
12767 "External" second parameter is now optional
12769 "ElseIf" syntax now properly allows the predicate
12771 Last operand to "Load" now recognized as a Target operand
12773 Debug object can now be used anywhere as a normal object.
12775 ResourceTemplate now returns an object of type BUFFER
12777 EISAID now returns an object of type INTEGER
12779 "Index" now works with a STRING operand
12781 "LoadTable" now accepts optional parameters
12783 "ToString" length parameter is now optional
12785 "Interrupt (ResourceType," parse error fixed.
12787 "Register" with a user-defined region space parse error fixed
12789 Escaped backslash at the end of a string ("\\") scan/parse error
12792 "Revision" is now an object of type INTEGER.
12796 ------------------------------------------
12797 Summary of changes for this label: 05_02_01
12801 /proc/acpi/event now blocks properly.
12803 Removed /proc/sys/acpi. You can still dump your DSDT from
12806 ACPI CA Core Subsystem:
12808 Fixed a problem introduced in the previous label where some of the
12809 "small" resource descriptor types were not recognized.
12811 Improved error messages for the case where an ASL Field is outside
12812 the range of the parent operation region.
12814 ASL Compiler, version X2018:
12817 Added error detection for ASL Fields that extend beyond the length
12818 of the parent operation region (only if the length of the region
12819 is known at compile time.) This includes fields that have a
12820 minimum access width that is smaller than the parent region, and
12821 individual field units that are partially or entirely beyond the
12822 extent of the parent.
12826 ------------------------------------------
12827 Summary of changes for this label: 04_27_01
12829 ACPI CA Core Subsystem:
12831 Fixed a problem where the namespace mutex could be released at the
12832 wrong time during execution of AcpiRemoveAddressSpaceHandler.
12834 Added optional thread ID output for debug traces, to simplify
12835 debugging of multiple threads. Added context switch notification
12836 when the debug code realizes that a different thread is now
12837 executing ACPI code.
12839 Some additional external data types have been prefixed with the
12840 string "ACPI_" for consistency. This may effect existing code.
12841 The data types affected are the external callback typedefs - e.g.,
12843 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
12847 Fixed an issue with the OSL semaphore implementation where a
12848 thread was waking up with an error from receiving a SIGCHLD
12851 Linux version of ACPI CA now uses the system C library for string
12852 manipulation routines instead of a local implementation.
12854 Cleaned up comments and removed TBDs.
12856 ASL Compiler, version X2017:
12858 Enhanced error detection and reporting for all file I/O
12863 Programmer Reference updated to version 1.06.
12867 ------------------------------------------
12868 Summary of changes for this label: 04_13_01
12870 ACPI CA Core Subsystem:
12872 Restructured support for BufferFields and RegionFields.
12873 BankFields support is now fully operational. All known 32-bit
12874 limitations on field sizes have been removed. Both BufferFields
12875 and (Operation) RegionFields are now supported by the same field
12878 Resource support now supports QWORD address and IO resources. The
12879 16/32/64 bit address structures and the Extended IRQ structure
12880 have been changed to properly handle Source Resource strings.
12882 A ThreadId of -1 is now used to indicate a "mutex not acquired"
12883 condition internally and must never be returned by AcpiOsThreadId.
12884 This reserved value was changed from 0 since Unix systems allow a
12889 Driver code reorganized to enhance portability
12891 Added a kernel configuration option to control ACPI_DEBUG
12893 Fixed the EC driver to honor _GLK.
12895 ASL Compiler, version X2016:
12897 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
12898 address space was set to 0, not 0x7f as it should be.
12900 ------------------------------------------
12901 Summary of changes for this label: 03_13_01
12903 ACPI CA Core Subsystem:
12905 During ACPI initialization, the _SB_._INI method is now run if
12908 Notify handler fix - notifies are deferred until the parent method
12909 completes execution. This fixes the "mutex already acquired"
12910 issue seen occasionally.
12912 Part of the "implicit conversion" rules in ACPI 2.0 have been
12913 found to cause compatibility problems with existing ASL/AML. The
12914 convert "result-to-target-type" implementation has been removed
12915 for stores to method Args and Locals. Source operand conversion
12916 is still fully implemented. Possible changes to ACPI 2.0
12917 specification pending.
12919 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
12922 Fix for compiler warnings for 64-bit compiles.
12926 /proc output aligned for easier parsing.
12928 Release-version compile problem fixed.
12930 New kernel configuration options documented in Configure.help.
12932 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
12937 Power resource driver integrated with bus manager.
12939 Fixed kernel fault during active cooling for thermal zones.
12943 The source code tree has been restructured.
12947 ------------------------------------------
12948 Summary of changes for this label: 03_02_01
12950 Linux OS Services Layer (OSL):
12952 Major revision of all Linux-specific code.
12954 Modularized all ACPI-specific drivers.
12956 Added new thermal zone and power resource drivers.
12958 Revamped /proc interface (new functionality is under /proc/acpi).
12960 New kernel configuration options.
12962 Linux known issues:
12964 New kernel configuration options not documented in Configure.help
12968 Module dependencies not currently implemented. If used, they
12969 should be loaded in this order: busmgr, power, ec, system,
12970 processor, battery, ac_adapter, button, thermal.
12972 Modules will not load if CONFIG_MODVERSION is set.
12974 IBM 600E - entering S5 may reboot instead of shutting down.
12976 IBM 600E - Sleep button may generate "Invalid <NULL> context"
12979 Some systems may fail with "execution mutex already acquired"
12982 ACPI CA Core Subsystem:
12984 Added a new OSL Interface, AcpiOsGetThreadId. This was required
12985 for the deadlock detection code. Defined to return a non-zero, 32-
12986 bit thread ID for the currently executing thread. May be a non-
12987 zero constant integer on single-thread systems.
12989 Implemented deadlock detection for internal subsystem mutexes. We
12990 may add conditional compilation for this code (debug only) later.
12992 ASL/AML Mutex object semantics are now fully supported. This
12993 includes multiple acquires/releases by owner and support for the
12995 Mutex SyncLevel parameter.
12997 A new "Force Release" mechanism automatically frees all ASL
12998 Mutexes that have been acquired but not released when a thread
12999 exits the interpreter. This forces conformance to the ACPI spec
13000 ("All mutexes must be released when an invocation exits") and
13001 prevents deadlocked ASL threads. This mechanism can be expanded
13002 (later) to monitor other resource acquisitions if OEM ASL code
13003 continues to misbehave (which it will).
13005 Several new ACPI exception codes have been added for the Mutex
13008 Recursive method calls are now allowed and supported (the ACPI
13009 spec does in fact allow recursive method calls.) The number of
13010 recursive calls is subject to the restrictions imposed by the
13011 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
13014 Implemented support for the SyncLevel parameter for control
13015 methods (ACPI 2.0 feature)
13017 Fixed a deadlock problem when multiple threads attempted to use
13020 Fixed a problem where the string length of a String package
13021 element was not always set in a package returned from
13022 AcpiEvaluateObject.
13024 Fixed a problem where the length of a String package element was
13025 not always included in the length of the overall package returned
13026 from AcpiEvaluateObject.
13028 Added external interfaces (Acpi*) to the ACPI debug memory
13029 manager. This manager keeps a list of all outstanding
13030 allocations, and can therefore detect memory leaks and attempts to
13031 free memory blocks more than once. Useful for code such as the
13032 power manager, etc. May not be appropriate for device drivers.
13033 Performance with the debug code enabled is slow.
13035 The ACPI Global Lock is now an optional hardware element.
13037 ASL Compiler Version X2015:
13039 Integrated changes to allow the compiler to be generated on
13040 multiple platforms.
13042 Linux makefile added to generate the compiler on Linux
13046 All platform-specific headers have been moved to their own
13047 subdirectory, Include/Platform.
13049 New source file added, Interpreter/ammutex.c
13051 New header file, Include/acstruct.h
13055 The programmer reference has been updated for the following new
13056 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
13058 ------------------------------------------
13059 Summary of changes for this label: 02_08_01
13061 Core ACPI CA Subsystem: Fixed a problem where an error was
13062 incorrectly returned if the return resource buffer was larger than
13063 the actual data (in the resource interfaces).
13065 References to named objects within packages are resolved to the
13067 full pathname string before packages are returned directly (via
13068 the AcpiEvaluateObject interface) or indirectly via the resource
13071 Linux OS Services Layer (OSL):
13073 Improved /proc battery interface.
13076 Added C-state debugging output and other miscellaneous fixes.
13078 ASL Compiler Version X2014:
13080 All defined method arguments can now be used as local variables,
13081 including the ones that are not actually passed in as parameters.
13082 The compiler tracks initialization of the arguments and issues an
13083 exception if they are used without prior assignment (just like
13086 The -o option now specifies a filename prefix that is used for all
13087 output files, including the AML output file. Otherwise, the
13088 default behavior is as follows: 1) the AML goes to the file
13089 specified in the DSDT. 2) all other output files use the input
13090 source filename as the base.
13092 ------------------------------------------
13093 Summary of changes for this label: 01_25_01
13095 Core ACPI CA Subsystem: Restructured the implementation of object
13096 store support within the interpreter. This includes support for
13097 the Store operator as well as any ASL operators that include a
13100 Partially implemented support for Implicit Result-to-Target
13101 conversion. This is when a result object is converted on the fly
13102 to the type of an existing target object. Completion of this
13103 support is pending further analysis of the ACPI specification
13104 concerning this matter.
13106 CPU-specific code has been removed from the subsystem (hardware
13109 New Power Management Timer functions added
13111 Linux OS Services Layer (OSL): Moved system state transition code
13112 to the core, fixed it, and modified Linux OSL accordingly.
13114 Fixed C2 and C3 latency calculations.
13117 We no longer use the compilation date for the version message on
13118 initialization, but retrieve the version from AcpiGetSystemInfo().
13120 Incorporated for fix Sony VAIO machines.
13122 Documentation: The Programmer Reference has been updated and
13126 ASL Compiler: Version X2013: Fixed a problem where the line
13127 numbering and error reporting could get out of sync in the
13128 presence of multiple include files.
13130 ------------------------------------------
13131 Summary of changes for this label: 01_15_01
13133 Core ACPI CA Subsystem:
13135 Implemented support for type conversions in the execution of the
13136 ASL Concatenate operator (The second operand is converted to
13137 match the type of the first operand before concatenation.)
13139 Support for implicit source operand conversion is partially
13140 implemented. The ASL source operand types Integer, Buffer, and
13141 String are freely interchangeable for most ASL operators and are
13142 converted by the interpreter on the fly as required. Implicit
13143 Target operand conversion (where the result is converted to the
13144 target type before storing) is not yet implemented.
13146 Support for 32-bit and 64-bit BCD integers is implemented.
13148 Problem fixed where a field read on an aligned field could cause a
13149 read past the end of the field.
13151 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
13152 does not return a value, but the caller expects one. (The ASL
13153 compiler flags this as a warning.)
13158 1. Static typechecking of all operands is implemented. This
13159 prevents the use of invalid objects (such as using a Package where
13160 an Integer is required) at compile time instead of at interpreter
13162 2. The ASL source line is printed with ALL errors and warnings.
13163 3. Bug fix for source EOF without final linefeed.
13164 4. Debug option is split into a parse trace and a namespace trace.
13165 5. Namespace output option (-n) includes initial values for
13166 integers and strings.
13167 6. Parse-only option added for quick syntax checking.
13168 7. Compiler checks for duplicate ACPI name declarations
13171 1. Relaxed typechecking to allow interchangeability between
13172 strings, integers, and buffers. These types are now converted by
13173 the interpreter at runtime.
13174 2. Compiler reports time taken by each internal subsystem in the
13178 ------------------------------------------
13179 Summary of changes for this label: 12_14_00
13183 This is the first official release of the compiler. Since the
13184 compiler requires elements of the Core Subsystem, this label
13185 synchronizes everything.
13187 ------------------------------------------
13188 Summary of changes for this label: 12_08_00
13191 Fixed a problem where named references within the ASL definition
13192 of both OperationRegions and CreateXXXFields did not work
13193 properly. The symptom was an AE_AML_OPERAND_TYPE during
13194 initialization of the region/field. This is similar (but not
13195 related internally) to the problem that was fixed in the last
13198 Implemented both 32-bit and 64-bit support for the BCD ASL
13199 functions ToBCD and FromBCD.
13201 Updated all legal headers to include "2000" in the copyright
13204 ------------------------------------------
13205 Summary of changes for this label: 12_01_00
13207 Fixed a problem where method invocations within the ASL definition
13208 of both OperationRegions and CreateXXXFields did not work
13209 properly. The symptom was an AE_AML_OPERAND_TYPE during
13210 initialization of the region/field:
13212 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
13213 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
13216 Fixed a problem where operators with more than one nested
13217 subexpression would fail. The symptoms were varied, by mostly
13218 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
13219 problem that has gone unnoticed until now.
13221 Subtract (Add (1,2), Multiply (3,4))
13223 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
13224 previous build (The prefix part of a relative path was handled
13227 Fixed a problem where Operation Region initialization failed if
13228 the operation region name was a "namepath" instead of a simple
13229 "nameseg". Symptom was an AE_NO_OPERAND error.
13231 Fixed a problem where an assignment to a local variable via the
13232 indirect RefOf mechanism only worked for the first such
13233 assignment. Subsequent assignments were ignored.
13235 ------------------------------------------
13236 Summary of changes for this label: 11_15_00
13238 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
13239 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
13240 the AML interpreter does NOT have support for the new 2.0 ASL
13241 grammar terms at this time.
13243 All ACPI hardware access is via the GAS structures in the ACPI 2.0
13246 All physical memory addresses across all platforms are now 64 bits
13247 wide. Logical address width remains dependent on the platform
13250 AcpiOsMapMemory interface changed to a 64-bit physical address.
13252 The AML interpreter integer size is now 64 bits, as per the ACPI
13255 For backwards compatibility with ACPI 1.0, ACPI tables with a
13256 revision number less than 2 use 32-bit integers only.
13258 Fixed a problem where the evaluation of OpRegion operands did not
13259 always resolve them to numbers properly.
13261 ------------------------------------------
13262 Summary of changes for this label: 10_20_00
13264 Fix for CBN_._STA issue. This fix will allow correct access to
13265 CBN_ OpRegions when the _STA returns 0x8.
13267 Support to convert ACPI constants (Ones, Zeros, One) to actual
13268 values before a package object is returned
13270 Fix for method call as predicate to if/while construct causing
13271 incorrect if/while behavior
13273 Fix for Else block package lengths sometimes calculated wrong (if
13276 Fix for Processor object length field, was always zero
13278 Table load abort if FACP sanity check fails
13280 Fix for problem with Scope(name) if name already exists
13282 Warning emitted if a named object referenced cannot be found
13283 (resolved) during method execution.
13289 ------------------------------------------
13290 Summary of changes for this label: 9_29_00
13292 New table initialization interfaces: AcpiInitializeSubsystem no
13293 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
13294 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
13295 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
13298 Note: These interface changes require changes to all existing OSDs
13300 The PCI_Config default address space handler is always installed
13301 at the root namespace object.
13303 -------------------------------------------
13304 Summary of changes for this label: 09_15_00
13306 The new initialization architecture is implemented. New
13307 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
13308 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
13310 (Namespace is automatically loaded when a table is loaded)
13312 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
13313 52 bytes to 32 bytes. There is usually one of these for every
13314 namespace object, so the memory savings is significant.
13316 Implemented just-in-time evaluation of the CreateField operators.
13318 Bug fixes for IA-64 support have been integrated.
13320 Additional code review comments have been implemented
13322 The so-called "third pass parse" has been replaced by a final walk
13323 through the namespace to initialize all operation regions (address
13324 spaces) and fields that have not yet been initialized during the
13325 execution of the various _INI and REG methods.
13327 New file - namespace/nsinit.c
13329 -------------------------------------------
13330 Summary of changes for this label: 09_01_00
13332 Namespace manager data structures have been reworked to change the
13333 primary object from a table to a single object. This has
13334 resulted in dynamic memory savings of 3X within the namespace and
13335 2X overall in the ACPI CA subsystem.
13337 Fixed problem where the call to AcpiEvFindPciRootBuses was
13338 inadvertently left commented out.
13340 Reduced the warning count when generating the source with the GCC
13343 Revision numbers added to each module header showing the
13344 SourceSafe version of the file. Please refer to this version
13345 number when giving us feedback or comments on individual modules.
13347 The main object types within the subsystem have been renamed to
13348 clarify their purpose:
13350 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
13351 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
13352 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
13354 NOTE: no changes to the initialization sequence are included in
13357 -------------------------------------------
13358 Summary of changes for this label: 08_23_00
13360 Fixed problem where TerminateControlMethod was being called
13361 multiple times per method
13363 Fixed debugger problem where single stepping caused a semaphore to
13366 Improved performance through additional parse object caching -
13367 added ACPI_EXTENDED_OP type
13369 -------------------------------------------
13370 Summary of changes for this label: 08_10_00
13372 Parser/Interpreter integration: Eliminated the creation of
13373 complete parse trees for ACPI tables and control methods.
13374 Instead, parse subtrees are created and then deleted as soon as
13375 they are processed (Either entered into the namespace or executed
13376 by the interpreter). This reduces the use of dynamic kernel
13377 memory significantly. (about 10X)
13379 Exception codes broken into classes and renumbered. Be sure to
13380 recompile all code that includes acexcep.h. Hopefully we won't
13381 have to renumber the codes again now that they are split into
13382 classes (environment, programmer, AML code, ACPI table, and
13385 Fixed some additional alignment issues in the Resource Manager
13388 Implemented semaphore tracking in the AcpiExec utility, and fixed
13389 several places where mutexes/semaphores were being unlocked
13390 without a corresponding lock operation. There are no known
13391 semaphore or mutex "leaks" at this time.
13393 Fixed the case where an ASL Return operator is used to return an
13396 -------------------------------------------
13397 Summary of changes for this label: 07_28_00
13399 Fixed a problem with the way addresses were calculated in
13400 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
13401 manifested itself when a Field was created with WordAccess or
13402 DwordAccess, but the field unit defined within the Field was less
13404 than a Word or Dword.
13406 Fixed a problem in AmlDumpOperands() module's loop to pull
13407 operands off of the operand stack to display information. The
13408 problem manifested itself as a TLB error on 64-bit systems when
13409 accessing an operand stack with two or more operands.
13411 Fixed a problem with the PCI configuration space handlers where
13412 context was getting confused between accesses. This required a
13413 change to the generic address space handler and address space
13414 setup definitions. Handlers now get both a global handler context
13415 (this is the one passed in by the user when executing
13416 AcpiInstallAddressSpaceHandler() and a specific region context
13417 that is unique to each region (For example, the _ADR, _SEG and
13418 _BBN values associated with a specific region). The generic
13419 function definitions have changed to the following:
13421 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
13422 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
13423 *HandlerContext, // This used to be void *Context void
13424 *RegionContext); // This is an additional parameter
13426 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
13427 RegionHandle, UINT32 Function, void *HandlerContext, void
13428 **RegionContext); // This used to be **ReturnContext
13430 -------------------------------------------
13431 Summary of changes for this label: 07_21_00
13433 Major file consolidation and rename. All files within the
13434 interpreter have been renamed as well as most header files. This
13435 was done to prevent collisions with existing files in the host
13436 OSs -- filenames such as "config.h" and "global.h" seem to be
13437 quite common. The VC project files have been updated. All
13438 makefiles will require modification.
13440 The parser/interpreter integration continues in Phase 5 with the
13441 implementation of a complete 2-pass parse (the AML is parsed
13442 twice) for each table; This avoids the construction of a huge
13443 parse tree and therefore reduces the amount of dynamic memory
13444 required by the subsystem. Greater use of the parse object cache
13445 means that performance is unaffected.
13447 Many comments from the two code reviews have been rolled in.
13449 The 64-bit alignment support is complete.
13451 -------------------------------------------
13452 Summary of changes for this label: 06_30_00
13454 With a nod and a tip of the hat to the technology of yesteryear,
13455 we've added support in the source code for 80 column output
13456 devices. The code is now mostly constrained to 80 columns or
13457 less to support environments and editors that 1) cannot display
13458 or print more than 80 characters on a single line, and 2) cannot
13459 disable line wrapping.
13461 A major restructuring of the namespace data structure has been
13462 completed. The result is 1) cleaner and more
13463 understandable/maintainable code, and 2) a significant reduction
13464 in the dynamic memory requirement for each named ACPI object
13467 -------------------------------------------
13468 Summary of changes for this label: 06_23_00
13470 Linux support has been added. In order to obtain approval to get
13471 the ACPI CA subsystem into the Linux kernel, we've had to make
13472 quite a few changes to the base subsystem that will affect all
13473 users (all the changes are generic and OS- independent). The
13474 effects of these global changes have been somewhat far reaching.
13475 Files have been merged and/or renamed and interfaces have been
13476 renamed. The major changes are described below.
13478 Osd* interfaces renamed to AcpiOs* to eliminate namespace
13479 pollution/confusion within our target kernels. All OSD
13480 interfaces must be modified to match the new naming convention.
13482 Files merged across the subsystem. A number of the smaller source
13483 and header files have been merged to reduce the file count and
13484 increase the density of the existing files. There are too many
13485 to list here. In general, makefiles that call out individual
13486 files will require rebuilding.
13488 Interpreter files renamed. All interpreter files now have the
13489 prefix am* instead of ie* and is*.
13491 Header files renamed: The acapi.h file is now acpixf.h. The
13492 acpiosd.h file is now acpiosxf.h. We are removing references to
13493 the acronym "API" since it is somewhat windowsy. The new name is
13494 "external interface" or xface or xf in the filenames.j
13497 All manifest constants have been forced to upper case (some were
13498 mixed case.) Also, the string "ACPI_" has been prepended to many
13499 (not all) of the constants, typedefs, and structs.
13501 The globals "DebugLevel" and "DebugLayer" have been renamed
13502 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
13504 All other globals within the subsystem are now prefixed with
13505 "AcpiGbl_" Internal procedures within the subsystem are now
13506 prefixed with "Acpi" (with only a few exceptions). The original
13507 two-letter abbreviation for the subcomponent remains after "Acpi"
13508 - for example, CmCallocate became AcpiCmCallocate.
13510 Added a source code translation/conversion utility. Used to
13511 generate the Linux source code, it can be modified to generate
13512 other types of source as well. Can also be used to cleanup
13513 existing source by removing extraneous spaces and blank lines.
13514 Found in tools/acpisrc/*
13516 OsdUnMapMemory was renamed to OsdUnmapMemory and then
13517 AcpiOsUnmapMemory. (UnMap became Unmap).
13519 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
13520 When set to one, this indicates that the caller wants to use the
13522 semaphore as a mutex, not a counting semaphore. ACPI CA uses
13523 both types. However, implementers of this call may want to use
13524 different OS primitives depending on the type of semaphore
13525 requested. For example, some operating systems provide separate
13527 "mutex" and "semaphore" interfaces - where the mutex interface is
13528 much faster because it doesn't have all the overhead of a full
13529 semaphore implementation.
13531 Fixed a deadlock problem where a method that accesses the PCI
13532 address space can block forever if it is the first access to the
13535 -------------------------------------------
13536 Summary of changes for this label: 06_02_00
13538 Support for environments that cannot handle unaligned data
13539 accesses (e.g. firmware and OS environments devoid of alignment
13540 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
13541 been added (via configurable macros) in these three areas: -
13542 Transfer of data from the raw AML byte stream is done via byte
13543 moves instead of word/dword/qword moves. - External objects are
13544 aligned within the user buffer, including package elements (sub-
13545 objects). - Conversion of name strings to UINT32 Acpi Names is now
13548 The Store operator was modified to mimic Microsoft's
13549 implementation when storing to a Buffer Field.
13551 Added a check of the BM_STS bit before entering C3.
13553 The methods subdirectory has been obsoleted and removed. A new
13554 file, cmeval.c subsumes the functionality.
13556 A 16-bit (DOS) version of AcpiExec has been developed. The
13557 makefile is under the acpiexec directory.