1 ----------------------------------------
2 21 May 2009. Summary of changes for version 20090521:
4 This release is available at www.acpica.org/downloads
6 1) ACPI CA Core Subsystem:
8 Disabled the preservation of the SCI enable bit in the PM1 control register.
9 The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification to be
10 a "preserved" bit - "OSPM always preserves this bit position", section
11 4.7.3.2.1. However, some machines fail if this bit is in fact preserved
12 because the bit needs to be explicitly set by the OS as a workaround. No
13 machines fail if the bit is not preserved. Therefore, ACPICA no longer
14 attempts to preserve this bit.
16 Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
17 incorrectly formed _PRT package could cause a fault. Added validation to
18 ensure that each package element is actually a sub-package.
20 Implemented a new interface to install or override a single control method,
21 AcpiInstallMethod. This interface is useful when debugging in order to repair
22 an existing method or to install a missing method without having to override
23 the entire ACPI table. See the ACPICA Programmer Reference for use and
24 examples. Lin Ming, Bob Moore.
26 Fixed several reference count issues with the DdbHandle object that is
27 created from a Load or LoadTable operator. Prevent premature deletion of the
28 object. Also, mark the object as invalid once the table has been unloaded.
29 This is needed because the handle itself may not be deleted after the table
30 unload, depending on whether it has been stored in a named object by the
33 Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
34 mutexes of the same sync level are acquired but then not released in strict
35 opposite order, the internally maintained Current Sync Level becomes confused
36 and can cause subsequent execution errors. ACPICA BZ 471.
38 Changed the allowable release order for ASL mutex objects. The ACPI 4.0
39 specification has been changed to make the SyncLevel for mutex objects more
40 useful. When releasing a mutex, the SyncLevel of the mutex must now be the
41 same as the current sync level. This makes more sense than the previous rule
42 (SyncLevel less than or equal). This change updates the code to match the
45 Fixed a problem with the local version of the AcpiOsPurgeCache function. The
46 (local) cache must be locked during all cache object deletions. Andrew
49 Updated the Load operator to use operation region interfaces. This replaces
50 direct memory mapping with region access calls. Now, all region accesses go
51 through the installed region handler as they should.
53 Simplified and optimized the NsGetNextNode function. Reduced parameter count
54 and reduced code for this frequently used function.
56 Example Code and Data Size: These are the sizes for the OS-independent
57 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
58 debug version of the code includes the debug output trace mechanism and has a
59 much larger code and data size.
62 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
63 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
65 Non-Debug Version: 83.4K Code, 17.5K Data, 100.9K Total
66 Debug Version: 158.9K Code, 50.0K Data, 208.9K Total
68 2) iASL Compiler/Disassembler and Tools:
70 Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some problems
71 with sub-table disassembly and handling invalid sub-tables. Attempt recovery
72 after an invalid sub-table ID.
74 ----------------------------------------
75 22 April 2009. Summary of changes for version 20090422:
77 This release is available at www.acpica.org/downloads
79 1) ACPI CA Core Subsystem:
81 Fixed a compatibility issue with the recently released I/O port protection
82 mechanism. For windows compatibility, 1) On a port protection violation,
83 simply ignore the request and do not return an exception (allow the control
84 method to continue execution.) 2) If only part of the request overlaps a
85 protected port, read/write the individual ports that are not protected. Linux
88 Enhanced the execution of the ASL/AML BreakPoint operator so that it actually
89 breaks into the AML debugger if the debugger is present. This matches the
90 ACPI-defined behavior.
92 Fixed several possible warnings related to the use of the configurable
93 ACPI_THREAD_ID. This type can now be configured as either an integer or a
94 pointer with no warnings. Also fixes several warnings in printf-like
95 statements for the 64-bit build when the type is configured as a pointer.
98 Fixed a number of possible warnings when compiling with gcc 4+ (depending on
99 warning options.) Examples include printf formats, aliasing, unused globals,
100 missing prototypes, missing switch default statements, use of non-ANSI
101 library functions, use of non-ANSI constructs. See generate/unix/Makefile for
102 a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
104 Example Code and Data Size: These are the sizes for the OS-independent
105 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
106 debug version of the code includes the debug output trace mechanism and has a
107 much larger code and data size.
110 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
111 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
113 Non-Debug Version: 82.8K Code, 17.5K Data, 100.3K Total
114 Debug Version: 158.0K Code, 49.9K Data, 207.9K Total
116 2) iASL Compiler/Disassembler and Tools:
118 iASL: Fixed a generation warning from Bison 2.3 and fixed several warnings on
121 iASL: Fixed a problem where the Unix/Linux versions of the compiler could not
122 correctly digest Windows/DOS formatted files (with CR/LF).
124 iASL: Added a new option for "quiet mode" (-va) that produces only the
125 compilation summary, not individual errors and warnings. Useful for large
128 AcpiExec: Implemented a new option (-z) to enable a forced semaphore/mutex
129 timeout that can be used to detect hang conditions during execution of AML
130 code (includes both internal semaphores and AML-defined mutexes and events.)
132 Added new makefiles for the generation of acpica in a generic unix-like
133 environment. These makefiles are intended to generate the acpica tools and
134 utilities from the original acpica git source tree structure.
136 Test Suites: Updated and cleaned up the documentation files. Updated the
137 copyrights to 2009, affecting all source files. Use the new version of iASL
138 with quiet mode. Increased the number of available semaphores in the Windows
139 OSL, allowing the aslts to execute fully on Windows. For the Unix OSL, added
140 an alternate implementation of the semaphore timeout to allow aslts to
141 execute fully on Cygwin.
143 ----------------------------------------
144 20 March 2009. Summary of changes for version 20090320:
146 1) ACPI CA Core Subsystem:
148 Fixed a possible race condition between AcpiWalkNamespace and dynamic table
149 unloads. Added a reader/writer locking mechanism to allow multiple concurrent
150 namespace walks (readers), but block a dynamic table unload until it can gain
151 exclusive write access to the namespace. This fixes a problem where a table
152 unload could (possibly catastrophically) delete the portion of the namespace
153 that is currently being examined by a walk. Adds a new file, utlock.c, that
154 implements the reader/writer lock mechanism. ACPICA BZ 749.
156 Fixed a regression introduced in version 20090220 where a change to the FADT
157 handling could cause the ACPICA subsystem to access non-existent I/O ports.
159 Modified the handling of FADT register and table (FACS/DSDT) addresses. The
160 FADT can contain both 32-bit and 64-bit versions of these addresses.
161 Previously, the 64-bit versions were favored, meaning that if both 32 and 64
162 versions were valid, but not equal, the 64-bit version was used. This was
163 found to cause some machines to fail. Now, in this case, the 32-bit version
164 is used instead. This now matches the Windows behavior.
166 Implemented a new mechanism to protect certain I/O ports. Provides Microsoft
167 compatibility and protects the standard PC I/O ports from access via AML
168 code. Adds a new file, hwvalid.c
170 Fixed a possible extraneous warning message from the FADT support. The
171 message warns of a 32/64 length mismatch between the legacy and GAS
172 definitions for a register.
174 Removed the obsolete AcpiOsValidateAddress OSL interface. This interface is
175 made obsolete by the port protection mechanism above. It was previously used
176 to validate the entire address range of an operation region, which could be
177 incorrect if the range included illegal ports, but fields within the
178 operation region did not actually access those ports. Validation is now
179 performed on a per-field basis instead of the entire region.
181 Modified the handling of the PM1 Status Register ignored bit (bit 11.)
182 Ignored bits must be "preserved" according to the ACPI spec. Usually, this
183 means a read/modify/write when writing to the register. However, for status
184 registers, writing a one means clear the event. Writing a zero means preserve
185 the event (do not clear.) This behavior is clarified in the ACPI 4.0 spec,
186 and the ACPICA code now simply always writes a zero to the ignored bit.
188 Modified the handling of ignored bits for the PM1 A/B Control Registers. As
189 per the ACPI specification, for the control registers, preserve
190 (read/modify/write) all bits that are defined as either reserved or ignored.
192 Updated the handling of write-only bits in the PM1 A/B Control Registers.
193 When reading the register, zero the write-only bits as per the ACPI spec.
194 ACPICA BZ 443. Lin Ming.
196 Removed "Linux" from the list of supported _OSI strings. Linux no longer
197 wants to reply true to this request. The Windows strings are the only paths
198 through the AML that are tested and known to work properly.
201 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
202 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
204 Non-Debug Version: 82.6K Code, 17.6K Data, 100.2K Total
205 Debug Version: 157.7K Code, 49.9K Data, 207.6K Total
207 2) iASL Compiler/Disassembler and Tools:
209 Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c and
212 ----------------------------------------
213 20 February 2009. Summary of changes for version 20090220:
215 1) ACPI CA Core Subsystem:
217 Optimized the ACPI register locking. Removed locking for reads from the ACPI
218 bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is
219 not required when reading the single-bit registers. The
220 AcpiGetRegisterUnlocked function is no longer needed and has been removed.
221 This will improve performance for reads on these registers. ACPICA BZ 760.
223 Fixed the parameter validation for AcpiRead/Write. Now return
224 AE_BAD_PARAMETER if the input register pointer is null, and AE_BAD_ADDRESS if
225 the register has an address of zero. Previously, these cases simply returned
226 AE_OK. For optional registers such as PM1B status/enable/control, the caller
227 should check for a valid register address before calling. ACPICA BZ 748.
229 Renamed the external ACPI bit register access functions. Renamed
230 AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
231 functions. The new names are AcpiReadBitRegister and AcpiWriteBitRegister.
232 Also, restructured the code for these functions by simplifying the code path
233 and condensing duplicate code to reduce code size.
235 Added new functions to transparently handle the possibly split PM1 A/B
236 registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two functions
237 now handle the split registers for PM1 Status, Enable, and Control. ACPICA BZ
240 Added a function to handle the PM1 control registers, AcpiHwWritePm1Control.
241 This function writes both of the PM1 control registers (A/B). These registers
242 are different than the PM1 A/B status and enable registers in that different
243 values can be written to the A/B registers. Most notably, the SLP_TYP bits
244 can be different, as per the values returned from the _Sx predefined methods.
246 Removed an extra register write within AcpiHwClearAcpiStatus. This function
247 was writing an optional PM1B status register twice. The existing call to the
248 low-level AcpiHwRegisterWrite automatically handles a possibly split PM1 A/B
249 register. ACPICA BZ 751.
251 Split out the PM1 Status registers from the FADT. Added new globals for these
252 registers (A/B), similar to the way the PM1 Enable registers are handled.
253 Instead of overloading the FADT Event Register blocks. This makes the code
254 clearer and less prone to error.
256 Fixed the warning message for when the platform contains too many ACPI tables
257 for the default size of the global root table data structure. The calculation
258 for the truncation value was incorrect.
260 Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
261 obsolete macro, since it is now a simple reference to ->common.type. There
262 were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
264 Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
265 TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
266 simply SLEEP_TYPE. ACPICA BZ 754.
268 Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
269 function is only needed on 64-bit host operating systems and is thus not
270 included for 32-bit hosts.
272 Debug output: print the input and result for invocations of the _OSI reserved
273 control method via the ACPI_LV_INFO debug level. Also, reduced some of the
274 verbosity of this debug level. Len Brown.
276 Example Code and Data Size: These are the sizes for the OS-independent
277 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
278 debug version of the code includes the debug output trace mechanism and has a
279 much larger code and data size.
282 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
283 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
285 Non-Debug Version: 82.0K Code, 17.5K Data, 99.5K Total
286 Debug Version: 156.9K Code, 49.8K Data, 206.7K Total
288 2) iASL Compiler/Disassembler and Tools:
290 Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
291 various legal performance profiles.
293 ----------------------------------------
294 23 January 2009. Summary of changes for version 20090123:
296 1) ACPI CA Core Subsystem:
298 Added the 2009 copyright to all module headers and signons. This affects
299 virtually every file in the ACPICA core subsystem, the iASL compiler, and
302 Implemented a change to allow the host to override any ACPI table, including
303 dynamically loaded tables. Previously, only the DSDT could be replaced by the
304 host. With this change, the AcpiOsTableOverride interface is called for each
305 table found in the RSDT/XSDT during ACPICA initialization, and also whenever
306 a table is dynamically loaded via the AML Load operator.
308 Updated FADT flag definitions, especially the Boot Architecture flags.
310 Debugger: For the Find command, automatically pad the input ACPI name with
311 underscores if the name is shorter than 4 characters. This enables a match
312 with the actual namespace entry which is itself padded with underscores.
314 Example Code and Data Size: These are the sizes for the OS-independent
315 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
316 debug version of the code includes the debug output trace mechanism and has a
317 much larger code and data size.
320 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
321 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
323 Non-Debug Version: 82.3K Code, 17.5K Data, 99.8K Total
324 Debug Version: 157.3K Code, 49.8K Data, 207.1K Total
326 2) iASL Compiler/Disassembler and Tools:
328 Fix build error under Bison-2.4.
330 Dissasembler: Enhanced FADT support. Added decoding of the Boot Architecture
331 flags. Now decode all flags, regardless of the FADT version. Flag output
332 includes the FADT version which first defined each flag.
334 The iASL -g option now dumps the RSDT to a file (in addition to the FADT and
337 ----------------------------------------
338 04 December 2008. Summary of changes for version 20081204:
340 1) ACPI CA Core Subsystem:
342 The ACPICA Programmer Reference has been completely updated and revamped for
343 this release. This includes updates to the external interfaces, OSL
344 interfaces, the overview sections, and the debugger reference.
346 Several new ACPICA interfaces have been implemented and documented in the
347 programmer reference:
348 AcpiReset - Writes the reset value to the FADT-defined reset register.
349 AcpiDisableAllGpes - Disable all available GPEs.
350 AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
351 AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
352 AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
353 AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
354 AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
356 Most of the public ACPI hardware-related interfaces have been moved to a new
357 file, components/hardware/hwxface.c
359 Enhanced the FADT parsing and low-level ACPI register access: The ACPI
360 register lengths within the FADT are now used, and the low level ACPI
361 register access no longer hardcodes the ACPI register lengths. Given that
362 there may be some risk in actually trusting the FADT register lengths, a run-
363 time option was added to fall back to the default hardcoded lengths if the
364 FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
365 option is set to true for now, and a warning is issued if a suspicious FADT
366 register length is overridden with the default value.
368 Fixed a reference count issue in NsRepairObject. This problem was introduced
369 in version 20081031 as part of a fix to repair Buffer objects within
372 Added semaphore support to the Linux/Unix application OS-services layer
373 (OSL). ACPICA BZ 448. Lin Ming.
375 Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes will
376 be implemented in the OSL, or will binary semaphores be used instead.
378 Example Code and Data Size: These are the sizes for the OS-independent
379 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
380 debug version of the code includes the debug output trace mechanism and has a
381 much larger code and data size.
384 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
385 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
387 Non-Debug Version: 82.3K Code, 17.4K Data, 99.7K Total
388 Debug Version: 157.1K Code, 49.7K Data, 206.8K Total
390 2) iASL Compiler/Disassembler and Tools:
392 iASL: Completed the '-e' option to include additional ACPI tables in order to
393 aid with disassembly and External statement generation. ACPICA BZ 742. Lin
396 iASL: Removed the "named object in while loop" error. The compiler cannot
397 determine how many times a loop will execute. ACPICA BZ 730.
399 Disassembler: Implemented support for FADT revision 2 (MS extension). ACPICA
402 Disassembler: Updates for several ACPI data tables (HEST, EINJ, and MCFG).
404 ----------------------------------------
405 31 October 2008. Summary of changes for version 20081031:
407 1) ACPI CA Core Subsystem:
409 Restructured the ACPICA header files into public/private. acpi.h now includes
410 only the "public" acpica headers. All other acpica headers are "private" and
411 should not be included by acpica users. One new file, accommon.h is used to
412 include the commonly used private headers for acpica code generation. Future
413 plans include moving all private headers to a new subdirectory.
415 Implemented an automatic Buffer->String return value conversion for
416 predefined ACPI methods. For these methods (such as _BIF), added automatic
417 conversion for return objects that are required to be a String, but a Buffer
418 was found instead. This can happen when reading string battery data from an
419 operation region, because it used to be difficult to convert the data from
420 buffer to string from within the ASL. Ensures that the host OS is provided
421 with a valid null-terminated string. Linux BZ 11822.
423 Updated the FACS waking vector interfaces. Split AcpiSetFirmwareWakingVector
424 into two: one for the 32-bit vector, another for the 64-bit vector. This is
425 required because the host OS must setup the wake much differently for each
426 vector (real vs. protected mode, etc.) and the interface itself should not be
427 deciding which vector to use. Also, eliminated the GetFirmwareWakingVector
428 interface, as it served no purpose (only the firmware reads the vector, OS
429 only writes the vector.) ACPICA BZ 731.
431 Implemented a mechanism to escape infinite AML While() loops. Added a loop
432 counter to force exit from AML While loops if the count becomes too large.
433 This can occur in poorly written AML when the hardware does not respond
434 within a while loop and the loop does not implement a timeout. The maximum
435 loop count is configurable. A new exception code is returned when a loop is
436 broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
438 Optimized the execution of AML While loops. Previously, a control state
439 object was allocated and freed for each execution of the loop. The
440 optimization is to simply reuse the control state for each iteration. This
441 speeds up the raw loop execution time by about 5%.
443 Enhanced the implicit return mechanism. For Windows compatibility, return an
444 implicit integer of value zero for methods that contain no executable code.
445 Such methods are seen in the field as stubs (presumably), and can cause
446 drivers to fail if they expect a return value. Lin Ming.
448 Allow multiple backslashes as root prefixes in namepaths. In a fully
449 qualified namepath, allow multiple backslash prefixes. This can happen (and
450 is seen in the field) because of the use of a double-backslash in strings
451 (since backslash is the escape character) causing confusion. ACPICA BZ 739
454 Emit a warning if two different FACS or DSDT tables are discovered in the
455 FADT. Checks if there are two valid but different addresses for the FACS and
456 DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
458 Consolidated the method argument count validation code. Merged the code that
459 validates control method argument counts into the predefined validation
460 module. Eliminates possible multiple warnings for incorrect argument counts.
462 Implemented ACPICA example code. Includes code for ACPICA initialization,
463 handler installation, and calling a control method. Available at
464 source/tools/examples.
466 Added a global pointer for FACS table to simplify internal FACS access. Use
467 the global pointer instead of using AcpiGetTableByIndex for each FACS access.
468 This simplifies the code for the Global Lock and the Firmware Waking
471 Example Code and Data Size: These are the sizes for the OS-independent
472 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
473 debug version of the code includes the debug output trace mechanism and has a
474 much larger code and data size.
477 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
478 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
480 Non-Debug Version: 81.7K Code, 17.3K Data, 99.0K Total
481 Debug Version: 156.4K Code, 49.4K Data, 205.8K Total
483 2) iASL Compiler/Disassembler and Tools:
485 iASL: Improved disassembly of external method calls. Added the -e option to
486 allow the inclusion of additional ACPI tables to help with the disassembly of
487 method invocations and the generation of external declarations during the
488 disassembly. Certain external method invocations cannot be disassembled
489 properly without the actual declaration of the method. Use the -e option to
490 include the table where the external method(s) are actually declared. Most
491 useful for disassembling SSDTs that make method calls back to the master
492 DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT: iasl -d
493 -e dsdt.aml ssdt1.aml
495 iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
496 problem where the use of an alias within a namepath would result in a not
497 found error or cause the compiler to fault. Also now allows forward
498 references from the Alias operator itself. ACPICA BZ 738.
500 ----------------------------------------
501 26 September 2008. Summary of changes for version 20080926:
503 1) ACPI CA Core Subsystem:
505 Designed and implemented a mechanism to validate predefined ACPI methods and
506 objects. This code validates the predefined ACPI objects (objects whose names
507 start with underscore) that appear in the namespace, at the time they are
508 evaluated. The argument count and the type of the returned object are
509 validated against the ACPI specification. The purpose of this validation is
510 to detect problems with the BIOS-implemented predefined ACPI objects before
511 the results are returned to the ACPI-related drivers. Future enhancements may
512 include actual repair of incorrect return objects where possible. Two new
513 files are nspredef.c and acpredef.h.
515 Fixed a fault in the AML parser if a memory allocation fails during the Op
516 completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
518 Fixed an issue with implicit return compatibility. This change improves the
519 implicit return mechanism to be more compatible with the MS interpreter. Lin
522 Implemented support for zero-length buffer-to-string conversions. Allow zero
523 length strings during interpreter buffer-to-string conversions. For example,
524 during the ToDecimalString and ToHexString operators, as well as implicit
525 conversions. Fiodor Suietov, ACPICA BZ 585.
527 Fixed two possible memory leaks in the error exit paths of
528 AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions are
529 similar in that they use a stack of state objects in order to eliminate
530 recursion. The stack must be fully unwound and deallocated if an error
531 occurs. Lin Ming. ACPICA BZ 383.
533 Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the global
534 ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
537 Removed the obsolete version number in module headers. Removed the
538 "$Revision" number that appeared in each module header. This version number
539 was useful under SourceSafe and CVS, but has no meaning under git. It is not
540 only incorrect, it could also be misleading.
542 Example Code and Data Size: These are the sizes for the OS-independent
543 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
544 debug version of the code includes the debug output trace mechanism and has a
545 much larger code and data size.
548 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
549 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
551 Non-Debug Version: 81.2K Code, 17.0K Data, 98.2K Total
552 Debug Version: 155.8K Code, 49.1K Data, 204.9K Total
554 ----------------------------------------
555 29 August 2008. Summary of changes for version 20080829:
557 1) ACPI CA Core Subsystem:
559 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
560 Reference. Changes include the elimination of cheating on the Object field
561 for the DdbHandle subtype, addition of a reference class field to
562 differentiate the various reference types (instead of an AML opcode), and the
563 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
565 Reduce an error to a warning for an incorrect method argument count.
566 Previously aborted with an error if too few arguments were passed to a
567 control method via the external ACPICA interface. Now issue a warning instead
568 and continue. Handles the case where the method inadvertently declares too
569 many arguments, but does not actually use the extra ones. Applies mainly to
570 the predefined methods. Lin Ming. Linux BZ 11032.
572 Disallow the evaluation of named object types with no intrinsic value. Return
573 AE_TYPE for objects that have no value and therefore evaluation is undefined:
574 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation of
575 these types were allowed, but an exception would be generated at some point
576 during the evaluation. Now, the error is generated up front.
578 Fixed a possible memory leak in the AcpiNsGetExternalPathname function
579 (nsnames.c). Fixes a leak in the error exit path.
581 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These debug
582 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and ACPI_EXCEPTION
583 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
586 Removed obsolete and/or unused exception codes from the acexcep.h header.
587 There is the possibility that certain device drivers may be affected if they
588 use any of these exceptions.
590 The ACPICA documentation has been added to the public git source tree, under
591 acpica/documents. Included are the ACPICA programmer reference, the iASL
592 compiler reference, and the changes.txt release logfile.
594 Example Code and Data Size: These are the sizes for the OS-independent
595 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
596 debug version of the code includes the debug output trace mechanism and has a
597 much larger code and data size.
600 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
601 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
603 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
604 Debug Version: 153.7K Code, 48.2K Data, 201.9K Total
606 2) iASL Compiler/Disassembler and Tools:
608 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
609 defines _SCP with 3 arguments. Previous versions defined it with only 1
610 argument. iASL now allows both definitions.
612 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for zero-
613 length subtables when disassembling ACPI tables. Also fixed a couple of
614 errors where a full 16-bit table type field was not extracted from the input
617 acpisrc: Improve comment counting mechanism for generating source code
618 statistics. Count first and last lines of multi-line comments as whitespace,
619 not comment lines. Handle Linux legal header in addition to standard acpica
622 ----------------------------------------
624 29 July 2008. Summary of changes for version 20080729:
626 This release is available at http://acpica.org/downloads
627 Direct git access via http://www.acpica.org/repos/acpica.git
629 1) ACPI CA Core Subsystem:
631 Fix a possible deadlock in the GPE dispatch. Remove call to
632 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will attempt
633 to acquire the GPE lock but can deadlock since the GPE lock is already held
634 at dispatch time. This code was introduced in version 20060831 as a response
635 to Linux BZ 6881 and has since been removed from Linux.
637 Add a function to dereference returned reference objects. Examines the return
638 object from a call to AcpiEvaluateObject. Any Index or RefOf references are
639 automatically dereferenced in an attempt to return something useful (these
640 reference types cannot be converted into an external ACPI_OBJECT.) Provides
641 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
643 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
644 subtables for the MADT and one new subtable for the SRAT. Includes
645 disassembler and AcpiSrc support. Data from the Intel 64 Architecture x2APIC
646 Specification, June 2008.
648 Additional error checking for pathname utilities. Add error check after all
649 calls to AcpiNsGetPathnameLength. Add status return from
650 AcpiNsBuildExternalPath and check after all calls. Add parameter validation
651 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
653 Return status from the global init function AcpiUtGlobalInitialize. This is
654 used by both the kernel subsystem and the utilities such as iASL compiler.
655 The function could possibly fail when the caches are initialized. Yang Yi.
657 Add a function to decode reference object types to strings. Created for
658 improved error messages.
660 Improve object conversion error messages. Better error messages during object
661 conversion from internal to the external ACPI_OBJECT. Used for external calls
662 to AcpiEvaluateObject.
664 Example Code and Data Size: These are the sizes for the OS-independent
665 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
666 debug version of the code includes the debug output trace mechanism and has a
667 much larger code and data size.
670 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
671 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
673 Non-Debug Version: 79.7K Code, 16.4K Data, 96.1K Total
674 Debug Version: 153.9K Code, 48.4K Data, 202.3K Total
676 2) iASL Compiler/Disassembler and Tools:
678 Debugger: fix a possible hang when evaluating non-methods. Fixes a problem
679 introduced in version 20080701. If the object being evaluated (via execute
680 command) is not a method, the debugger can hang while trying to obtain non-
683 iASL: relax error for using reserved "_T_x" identifiers. These names can
684 appear in a disassembled ASL file if they were emitted by the original
685 compiler. Instead of issuing an error or warning and forcing the user to
686 manually change these names, issue a remark instead.
688 iASL: error if named object created in while loop. Emit an error if any named
689 object is created within a While loop. If allowed, this code will generate a
690 run-time error on the second iteration of the loop when an attempt is made to
691 create the same named object twice. ACPICA bugzilla 730.
693 iASL: Support absolute pathnames for include files. Add support for absolute
694 pathnames within the Include operator. previously, only relative pathnames
697 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource Descriptor.
698 The ACPI spec requires one interrupt minimum. BZ 423
700 iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
701 Handles the case for the Interrupt Resource Descriptor where
702 the ResourceSource argument is omitted but ResourceSourceIndex
703 is present. Now leave room for the Index. BZ 426
705 iASL: Prevent error message if CondRefOf target does not exist. Fixes cases
706 where an error message is emitted if the target does not exist. BZ 516
708 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
709 (get ACPI tables on Windows). This was apparently broken in version 20070919.
711 AcpiXtract: Handle EOF while extracting data. Correctly handle the case where
712 the EOF happens immediately after the last table in the input file. Print
713 completion message. Previously, no message was displayed in this case.
715 ----------------------------------------
716 01 July 2008. Summary of changes for version 20080701:
718 This release is available at http://acpica.org/downloads
719 Direct git access via http://www.acpica.org/repos/acpica.git
721 0) Git source tree / acpica.org
723 Fixed a problem where a git-clone from http would not transfer the entire
726 1) ACPI CA Core Subsystem:
728 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
729 enable bit. Now performs a read-change-write of the enable register instead
730 of simply writing out the cached enable mask. This will prevent inadvertent
731 enabling of GPEs if a rogue GPE is received during initialization (before GPE
732 handlers are installed.)
734 Implemented a copy for dynamically loaded tables. Previously, dynamically
735 loaded tables were simply mapped - but on some machines this memory is
736 corrupted after suspend. Now copy the table to a local buffer. For the
737 OpRegion case, added checksum verify. Use the table length from the table
738 header, not the region length. For the Buffer case, use the table length
739 also. Dennis Noordsij, Bob Moore. BZ 10734
741 Fixed a problem where the same ACPI table could not be dynamically loaded and
742 unloaded more than once. Without this change, a table cannot be loaded again
743 once it has been loaded/unloaded one time. The current mechanism does not
744 unregister a table upon an unload. During a load, if the same table is found,
745 this no longer returns an exception. BZ 722
747 Fixed a problem where the wrong descriptor length was calculated for the
748 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as EndTag
749 are calculated as 12 bytes long, but the actual length in the internal
750 descriptor is 16 because of the round-up to 8 on the 64-bit build. Reported
751 by Linn Crosetto. BZ 728
753 Fixed a possible memory leak in the Unload operator. The DdbHandle returned
754 by Load() did not have its reference count decremented during unload, leading
755 to a memory leak. Lin Ming. BZ 727
757 Fixed a possible memory leak when deleting thermal/processor objects. Any
758 associated notify handlers (and objects) were not being deleted. Fiodor
761 Fixed the ordering of the ASCII names in the global mutex table to match the
762 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug only.
763 Vegard Nossum. BZ 726
765 Enhanced the AcpiGetObjectInfo interface to return the number of required
766 arguments if the object is a control method. Added this call to the debugger
767 so the proper number of default arguments are passed to a method. This
768 prevents a warning when executing methods from AcpiExec.
770 Added a check for an invalid handle in AcpiGetObjectInfo. Return
771 AE_BAD_PARAMETER if input handle is invalid. BZ 474
773 Fixed an extraneous warning from exconfig.c on the 64-bit build.
775 Example Code and Data Size: These are the sizes for the OS-independent
776 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
777 debug version of the code includes the debug output trace mechanism and has a
778 much larger code and data size.
781 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
782 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
784 Non-Debug Version: 79.6K Code, 16.2K Data, 95.8K Total
785 Debug Version: 153.5K Code, 48.2K Data, 201.7K Total
787 2) iASL Compiler/Disassembler and Tools:
789 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
790 resource descriptor names.
792 iASL: Detect invalid ASCII characters in input (windows version). Removed the
793 "-CF" flag from the flex compile, enables correct detection of non-ASCII
794 characters in the input. BZ 441
796 iASL: Eliminate warning when result of LoadTable is not used. Eliminate the
797 "result of operation not used" warning when the DDB handle returned from
798 LoadTable is not used. The warning is not needed. BZ 590
800 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG method to
801 pass address of table to the AML. Added option to disable OpRegion simulation
802 to allow creation of an OpRegion with a real address that was passed to _CFG.
803 All of this allows testing of the Load and Unload operators from AcpiExec.
805 Debugger: update tables command for unloaded tables. Handle unloaded tables
806 and use the standard table header output routine.
808 ----------------------------------------
809 09 June 2008. Summary of changes for version 20080609:
811 1) ACPI CA Core Subsystem:
813 Implemented a workaround for reversed _PRT entries. A significant number of
814 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
815 change dynamically detects and repairs this problem. Provides compatibility
816 with MS ACPI. BZ 6859
818 Simplified the internal ACPI hardware interfaces to eliminate the locking
819 flag parameter from Register Read/Write. Added a new external interface,
820 AcpiGetRegisterUnlocked.
822 Fixed a problem where the invocation of a GPE control method could hang. This
823 was a regression introduced in 20080514. The new method argument count
824 validation mechanism can enter an infinite loop when a GPE method is
825 dispatched. Problem fixed by removing the obsolete code that passed GPE block
826 information to the notify handler via the control method parameter pointer.
828 Fixed a problem where the _SST execution status was incorrectly returned to
829 the caller of AcpiEnterSleepStatePrep. This was a regression introduced in
830 20080514. _SST is optional and a NOT_FOUND exception should never be
833 Fixed a problem where a deleted object could be accessed from within the AML
834 parser. This was a regression introduced in version 20080123 as a fix for the
835 Unload operator. Lin Ming. BZ 10669
837 Cleaned up the debug operand dump mechanism. Eliminated unnecessary operands
838 and eliminated the use of a negative index in a loop. Operands are now
839 displayed in the correct order, not backwards. This also fixes a regression
840 introduced in 20080514 on 64-bit systems where the elimination of
841 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ 715
843 Fixed a possible memory leak in EvPciConfigRegionSetup where the error exit
844 path did not delete a locally allocated structure.
846 Updated definitions for the DMAR and SRAT tables to synchronize with the
847 current specifications. Includes disassembler support.
849 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
850 loop termination value was used. Loop terminated on iteration early, missing
851 one mutex. Linn Crosetto
853 Example Code and Data Size: These are the sizes for the OS-independent
854 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
855 debug version of the code includes the debug output trace mechanism and has a
856 much larger code and data size.
859 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
860 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
862 Non-Debug Version: 79.3K Code, 16.2K Data, 95.5K Total
863 Debug Version: 153.0K Code, 48.2K Data, 201.2K Total
865 2) iASL Compiler/Disassembler and Tools:
867 Disassembler: Implemented support for EisaId() within _CID objects. Now
868 disassemble integer _CID objects back to EisaId invocations, including
869 multiple integers within _CID packages. Includes single-step support for
872 Disassembler: Added support for DMAR and SRAT table definition changes.
874 ----------------------------------------
875 14 May 2008. Summary of changes for version 20080514:
877 1) ACPI CA Core Subsystem:
879 Fixed a problem where GPEs were enabled too early during the ACPICA
880 initialization. This could lead to "handler not installed" errors on some
881 machines. Moved GPE enable until after _REG/_STA/_INI methods are run. This
882 ensures that all operation regions and devices throughout the namespace have
883 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
885 Implemented a change to the enter sleep code. Moved execution of the _GTS
886 method to just before setting sleep enable bit. The execution was moved from
887 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
888 immediately before the SLP_EN bit is set, as per the ACPI specification.
891 Implemented a fix to disable unknown GPEs (2nd version). Now always disable
892 the GPE, even if ACPICA thinks that that it is already disabled. It is
893 possible that the AML or some other code has enabled the GPE unbeknownst to
896 Fixed a problem with the Field operator where zero-length fields would return
897 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length ASL
898 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
900 Implemented a fix for the Load operator, now load the table at the namespace
901 root. This reverts a change introduced in version 20071019. The table is now
902 loaded at the namespace root even though this goes against the ACPI
903 specification. This provides compatibility with other ACPI implementations.
904 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin Ming.
906 Fixed a problem where ACPICA would not Load() tables with unusual signatures.
907 Now ignore ACPI table signature for Load() operator. Only "SSDT" is
908 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
909 Therefore, signature validation is worthless. Apparently MS ACPI accepts such
910 signatures, ACPICA must be compatible. BZ 10454.
912 Fixed a possible negative array index in AcpiUtValidateException. Added NULL
913 fields to the exception string arrays to eliminate a -1 subtraction on the
916 Updated the debug tracking macros to reduce overall code and data size.
917 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
918 instead of pointers to static strings. Jan Beulich and Bob Moore.
920 Implemented argument count checking in control method invocation via
921 AcpiEvaluateObject. Now emit an error if too few arguments, warning if too
922 many. This applies only to extern programmatic control method execution, not
923 method-to-method calls within the AML. Lin Ming.
925 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is no
926 longer needed, especially with the removal of 16-bit support. It was replaced
927 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64 bit on
928 32/64-bit platforms is required.
930 Added the C const qualifier for appropriate string constants -- mostly
931 MODULE_NAME and printf format strings. Jan Beulich.
933 Example Code and Data Size: These are the sizes for the OS-independent
934 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
935 debug version of the code includes the debug output trace mechanism and has a
936 much larger code and data size.
939 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
940 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
942 Non-Debug Version: 79.5K Code, 16.2K Data, 95.7K Total
943 Debug Version: 153.3K Code, 48.3K Data, 201.6K Total
945 2) iASL Compiler/Disassembler and Tools:
947 Implemented ACPI table revision ID validation in the disassembler. Zero is
948 always invalid. For DSDTs, the ID controls the interpreter integer width. 1
949 means 32-bit and this is unusual. 2 or greater is 64-bit.
951 ----------------------------------------
952 21 March 2008. Summary of changes for version 20080321:
954 1) ACPI CA Core Subsystem:
956 Implemented an additional change to the GPE support in order to suppress
957 spurious or stray GPEs. The AcpiEvDisableGpe function will now permanently
958 disable incoming GPEs that are neither enabled nor disabled -- meaning that
959 the GPE is unknown to the system. This should prevent future interrupt floods
960 from that GPE. BZ 6217 (Zhang Rui)
962 Fixed a problem where NULL package elements were not returned to the
963 AcpiEvaluateObject interface correctly. The element was simply ignored
964 instead of returning a NULL ACPI_OBJECT package element, potentially causing
965 a buffer overflow and/or confusing the caller who expected a fixed number of
966 elements. BZ 10132 (Lin Ming, Bob Moore)
968 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word, Dword,
969 Qword), Field, BankField, and IndexField operators when invoked from inside
970 an executing control method. In this case, these operators created namespace
971 nodes that were incorrectly left marked as permanent nodes instead of
972 temporary nodes. This could cause a problem if there is race condition
973 between an exiting control method and a running namespace walk. (Reported by
976 Fixed a problem where the CreateField and CreateXXXField operators would
977 incorrectly allow duplicate names (the name of the field) with no exception
980 Implemented several changes for Notify handling. Added support for new Notify
981 values (ACPI 2.0+) and improved the Notify debug output. Notify on
982 PowerResource objects is no longer allowed, as per the ACPI specification.
983 (Bob Moore, Zhang Rui)
985 All Reference Objects returned via the AcpiEvaluateObject interface are now
986 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved for
987 NULL objects - either NULL package elements or unresolved named references.
989 Fixed a problem where an extraneous debug message was produced for package
990 objects (when debugging enabled). The message "Package List length larger
991 than NumElements count" is now produced in the correct case, and is now an
992 error message rather than a debug message. Added a debug message for the
993 opposite case, where NumElements is larger than the Package List (the package
994 will be padded out with NULL elements as per the ACPI spec.)
996 Implemented several improvements for the output of the ASL "Debug" object to
997 clarify and keep all data for a given object on one output line.
999 Fixed two size calculation issues with the variable-length Start Dependent
1000 resource descriptor.
1002 Example Code and Data Size: These are the sizes for the OS-independent
1003 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1004 debug version of the code includes the debug output trace mechanism and has
1005 a much larger code and data size.
1008 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1009 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1011 Non-Debug Version: 80.0K Code, 17.4K Data, 97.4K Total
1012 Debug Version: 159.4K Code, 64.4K Data, 223.8K Total
1014 2) iASL Compiler/Disassembler and Tools:
1016 Fixed a problem with the use of the Switch operator where execution of the
1017 containing method by multiple concurrent threads could cause an
1018 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
1019 actual Switch opcode, it must be simulated with local named temporary
1020 variables and if/else pairs. The solution chosen was to mark any method that
1021 uses Switch as Serialized, thus preventing multiple thread entries. BZ 469.
1023 ----------------------------------------
1024 13 February 2008. Summary of changes for version 20080213:
1026 1) ACPI CA Core Subsystem:
1028 Implemented another MS compatibility design change for GPE/Notify handling.
1029 GPEs are now cleared/enabled asynchronously to allow all pending notifies to
1030 complete first. It is expected that the OSL will queue the enable request
1031 behind all pending notify requests (may require changes to the local host OSL
1032 in AcpiOsExecute). Alexey Starikovskiy.
1034 Fixed a problem where buffer and package objects passed as arguments to a
1035 control method via the external AcpiEvaluateObject interface could cause an
1036 AE_AML_INTERNAL exception depending on the order and type of operators
1037 executed by the target control method.
1039 Fixed a problem where resource descriptor size optimization could cause a
1040 problem when a _CRS resource template is passed to a _SRS method. The _SRS
1041 resource template must use the same descriptors (with the same size) as
1042 returned from _CRS. This change affects the following resource descriptors:
1043 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ 9487)
1045 Fixed a problem where a CopyObject to RegionField, BankField, and IndexField
1046 objects did not perform an implicit conversion as it should. These types must
1047 retain their initial type permanently as per the ACPI specification. However,
1048 a CopyObject to all other object types should not perform an implicit
1049 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
1051 Fixed a problem with the AcpiGetDevices interface where the mechanism to
1052 match device CIDs did not examine the entire list of available CIDs, but
1053 instead aborted on the first non-matching CID. Andrew Patterson.
1055 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro was
1056 inadvertently changed to return a 16-bit value instead of a 32-bit value,
1057 truncating the upper dword of a 64-bit value. This macro is only used to
1058 display debug output, so no incorrect calculations were made. Also,
1059 reimplemented the macro so that a 64-bit shift is not performed by
1060 inefficient compilers.
1062 Added missing va_end statements that should correspond with each va_start
1065 Example Code and Data Size: These are the sizes for the OS-independent
1066 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1067 debug version of the code includes the debug output trace mechanism and has
1068 a much larger code and data size.
1071 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1072 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1074 Non-Debug Version: 79.7K Code, 17.3K Data, 97.0K Total
1075 Debug Version: 158.9K Code, 64.0K Data, 222.9K Total
1077 2) iASL Compiler/Disassembler and Tools:
1079 Implemented full disassembler support for the following new ACPI tables:
1080 BERT, EINJ, and ERST. Implemented partial disassembler support for the
1081 complicated HEST table. These tables support the Windows Hardware Error
1082 Architecture (WHEA).
1084 ----------------------------------------
1085 23 January 2008. Summary of changes for version 20080123:
1087 1) ACPI CA Core Subsystem:
1089 Added the 2008 copyright to all module headers and signons. This affects
1090 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1091 the tools/utilities.
1093 Fixed a problem with the SizeOf operator when used with Package and Buffer
1094 objects. These objects have deferred execution for some arguments, and the
1095 execution is now completed before the SizeOf is executed. This problem caused
1096 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore) BZ
1099 Implemented an enhancement to the interpreter "slack mode". In the absence of
1100 an explicit return or an implicitly returned object from the last executed
1101 opcode, a control method will now implicitly return an integer of value 0 for
1102 Microsoft compatibility. (Lin Ming) BZ 392
1104 Fixed a problem with the Load operator where an exception was not returned in
1105 the case where the table is already loaded. (Lin Ming) BZ 463
1107 Implemented support for the use of DDBHandles as an Indexed Reference, as per
1108 the ACPI spec. (Lin Ming) BZ 486
1110 Implemented support for UserTerm (Method invocation) for the Unload operator
1111 as per the ACPI spec. (Lin Ming) BZ 580
1113 Fixed a problem with the LoadTable operator where the OemId and OemTableId
1114 input strings could cause unexpected failures if they were shorter than the
1115 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
1117 Implemented support for UserTerm (Method invocation) for the Unload operator
1118 as per the ACPI spec. (Lin Ming) BZ 580
1120 Implemented header file support for new ACPI tables - BERT, ERST, EINJ, HEST,
1121 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
1123 Example Code and Data Size: These are the sizes for the OS-independent
1124 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1125 debug version of the code includes the debug output trace mechanism and has
1126 a much larger code and data size.
1129 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1130 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1132 Non-Debug Version: 79.5K Code, 17.2K Data, 96.7K Total
1133 Debug Version: 159.0K Code, 63.8K Data, 222.8K Total
1135 2) iASL Compiler/Disassembler and Tools:
1137 Implemented support in the disassembler for checksum validation on incoming
1138 binary DSDTs and SSDTs. If incorrect, a message is displayed within the table
1139 header dump at the start of the disassembly.
1141 Implemented additional debugging information in the namespace listing file
1142 created during compilation. In addition to the namespace hierarchy, the full
1143 pathname to each namespace object is displayed.
1145 Fixed a problem with the disassembler where invalid ACPI tables could cause
1146 faults or infinite loops.
1148 Fixed an unexpected parse error when using the optional "parameter types"
1149 list in a control method declaration. (Lin Ming) BZ 397
1151 Fixed a problem where two External declarations with the same name did not
1152 cause an error (Lin Ming) BZ 509
1154 Implemented support for full TermArgs (adding Argx, Localx and method
1155 invocation) for the ParameterData parameter to the LoadTable operator. (Lin
1158 ----------------------------------------
1159 19 December 2007. Summary of changes for version 20071219:
1161 1) ACPI CA Core Subsystem:
1163 Implemented full support for deferred execution for the TermArg string
1164 arguments for DataTableRegion. This enables forward references and full
1165 operand resolution for the three string arguments. Similar to OperationRegion
1166 deferred argument execution.) Lin Ming. BZ 430
1168 Implemented full argument resolution support for the BankValue argument to
1169 BankField. Previously, only constants were supported, now any TermArg may be
1170 used. Lin Ming BZ 387, 393
1172 Fixed a problem with AcpiGetDevices where the search of a branch of the
1173 device tree could be terminated prematurely. In accordance with the ACPI
1174 specification, the search down the current branch is terminated if a device
1175 is both not present and not functional (instead of just not present.) Yakui
1178 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly if
1179 the underlying AML code changed the GPE enable registers. Now, any unknown
1180 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately disabled
1181 instead of simply ignored. Rui Zhang.
1183 Fixed a problem with Index Fields where the Index register was incorrectly
1184 limited to a maximum of 32 bits. Now any size may be used.
1186 Fixed a couple memory leaks associated with "implicit return" objects when
1187 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
1189 Example Code and Data Size: These are the sizes for the OS-independent
1190 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1191 debug version of the code includes the debug output trace mechanism and has
1192 a much larger code and data size.
1195 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1196 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1198 Non-Debug Version: 79.3K Code, 17.2K Data, 96.5K Total
1199 Debug Version: 158.6K Code, 63.8K Data, 222.4K Total
1201 ----------------------------------------
1202 14 November 2007. Summary of changes for version 20071114:
1204 1) ACPI CA Core Subsystem:
1206 Implemented event counters for each of the Fixed Events, the ACPI SCI
1207 (interrupt) itself, and control methods executed. Named
1208 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively. These
1209 should be useful for debugging and statistics.
1211 Implemented a new external interface, AcpiGetStatistics, to retrieve the
1212 contents of the various event counters. Returns the current values for
1213 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
1214 AcpiMethodCount. The interface can be expanded in the future if new counters
1215 are added. Device drivers should use this interface rather than access the
1218 Fixed a problem with the FromBCD and ToBCD operators. With some compilers,
1219 the ShortDivide function worked incorrectly, causing problems with the BCD
1220 functions with large input values. A truncation from 64-bit to 32-bit
1221 inadvertently occurred. Internal BZ 435. Lin Ming
1223 Fixed a problem with Index references passed as method arguments. References
1224 passed as arguments to control methods were dereferenced immediately (before
1225 control was passed to the called method). The references are now correctly
1226 passed directly to the called method. BZ 5389. Lin Ming
1228 Fixed a problem with CopyObject used in conjunction with the Index operator.
1229 The reference was incorrectly dereferenced before the copy. The reference is
1230 now correctly copied. BZ 5391. Lin Ming
1232 Fixed a problem with Control Method references within Package objects. These
1233 references are now correctly generated. This completes the package
1234 construction overhaul that began in version 20071019.
1236 Example Code and Data Size: These are the sizes for the OS-independent
1237 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1238 debug version of the code includes the debug output trace mechanism and has
1239 a much larger code and data size.
1242 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1243 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1245 Non-Debug Version: 79.0K Code, 17.2K Data, 96.2K Total
1246 Debug Version: 157.9K Code, 63.6K Data, 221.5K Total
1249 2) iASL Compiler/Disassembler and Tools:
1251 The AcpiExec utility now installs handlers for all of the predefined
1252 Operation Region types. New types supported are: PCI_Config, CMOS, and
1255 Fixed a problem with the 64-bit version of AcpiExec where the extended (64-
1256 bit) address fields for the DSDT and FACS within the FADT were not being
1257 used, causing truncation of the upper 32-bits of these addresses. Lin Ming
1260 ----------------------------------------
1261 19 October 2007. Summary of changes for version 20071019:
1263 1) ACPI CA Core Subsystem:
1265 Fixed a problem with the Alias operator when the target of the alias is a
1266 named ASL operator that opens a new scope -- Scope, Device, PowerResource,
1267 Processor, and ThermalZone. In these cases, any children of the original
1268 operator could not be accessed via the alias, potentially causing unexpected
1269 AE_NOT_FOUND exceptions. (BZ 9067)
1271 Fixed a problem with the Package operator where all named references were
1272 created as object references and left otherwise unresolved. According to the
1273 ACPI specification, a Package can only contain Data Objects or references to
1274 control methods. The implication is that named references to Data Objects
1275 (Integer, Buffer, String, Package, BufferField, Field) should be resolved
1276 immediately upon package creation. This is the approach taken with this
1277 change. References to all other named objects (Methods, Devices, Scopes,
1278 etc.) are all now properly created as reference objects. (BZ 5328)
1280 Reverted a change to Notify handling that was introduced in version
1281 20070508. This version changed the Notify handling from asynchronous to
1282 fully synchronous (Device driver Notify handling with respect to the Notify
1283 ASL operator). It was found that this change caused more problems than it
1284 solved and was removed by most users.
1286 Fixed a problem with the Increment and Decrement operators where the type of
1287 the target object could be unexpectedly and incorrectly changed. (BZ 353)
1290 Fixed a problem with the Load and LoadTable operators where the table
1291 location within the namespace was ignored. Instead, the table was always
1292 loaded into the root or current scope. Lin Ming.
1294 Fixed a problem with the Load operator when loading a table from a buffer
1295 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
1297 Fixed a problem with the Debug object where a store of a DdbHandle reference
1298 object to the Debug object could cause a fault.
1300 Added a table checksum verification for the Load operator, in the case where
1301 the load is from a buffer. (BZ 578).
1303 Implemented additional parameter validation for the LoadTable operator. The
1304 length of the input strings SignatureString, OemIdString, and OemTableId are
1305 now checked for maximum lengths. (BZ 582) Lin Ming.
1307 Example Code and Data Size: These are the sizes for the OS-independent
1308 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1309 debug version of the code includes the debug output trace mechanism and has
1310 a much larger code and data size.
1313 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1314 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1316 Non-Debug Version: 78.8K Code, 17.2K Data, 96.0K Total
1317 Debug Version: 157.2K Code, 63.4K Data, 220.6K Total
1320 2) iASL Compiler/Disassembler:
1322 Fixed a problem where if a single file was specified and the file did not
1323 exist, no error message was emitted. (Introduced with wildcard support in
1326 ----------------------------------------
1327 19 September 2007. Summary of changes for version 20070919:
1329 1) ACPI CA Core Subsystem:
1331 Designed and implemented new external interfaces to install and remove
1332 handlers for ACPI table-related events. Current events that are defined are
1333 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
1334 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
1335 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
1337 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
1338 (acpi_serialized option on Linux) could cause some systems to hang during
1339 initialization. (Bob Moore) BZ 8171
1341 Fixed a problem where objects of certain types (Device, ThermalZone,
1342 Processor, PowerResource) can be not found if they are declared and
1343 referenced from within the same control method (Lin Ming) BZ 341
1345 Example Code and Data Size: These are the sizes for the OS-independent
1346 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1347 debug version of the code includes the debug output trace mechanism and has
1348 a much larger code and data size.
1351 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1352 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1354 Non-Debug Version: 78.5K Code, 17.1K Data, 95.6K Total
1355 Debug Version: 156.7K Code, 63.2K Data, 219.9K Total
1358 2) iASL Compiler/Disassembler:
1360 Implemented support to allow multiple files to be compiled/disassembled in a
1361 single invocation. This includes command line wildcard support for both the
1362 Windows and Unix versions of the compiler. This feature simplifies the
1363 disassembly and compilation of multiple ACPI tables in a single directory.
1365 ----------------------------------------
1366 08 May 2007. Summary of changes for version 20070508:
1368 1) ACPI CA Core Subsystem:
1370 Implemented a Microsoft compatibility design change for the handling of the
1371 Notify AML operator. Previously, notify handlers were dispatched and
1372 executed completely asynchronously in a deferred thread. The new design
1373 still executes the notify handlers in a different thread, but the original
1374 thread that executed the Notify() now waits at a synchronization point for
1375 the notify handler to complete. Some machines depend on a synchronous Notify
1376 operator in order to operate correctly.
1378 Implemented support to allow Package objects to be passed as method
1379 arguments to the external AcpiEvaluateObject interface. Previously, this
1380 would return the AE_NOT_IMPLEMENTED exception. This feature had not been
1381 implemented since there were no reserved control methods that required it
1384 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs that
1385 contained invalid non-zero values in reserved fields could cause later
1386 failures because these fields have meaning in later revisions of the FADT.
1387 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The fields
1388 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
1390 Fixed a problem where the Global Lock handle was not properly updated if a
1391 thread that acquired the Global Lock via executing AML code then attempted
1392 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by Joe
1395 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
1396 could be corrupted if the interrupt being removed was at the head of the
1397 list. Reported by Linn Crosetto.
1399 Example Code and Data Size: These are the sizes for the OS-independent
1400 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1401 debug version of the code includes the debug output trace mechanism and has
1402 a much larger code and data size.
1405 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1406 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
1408 Non-Debug Version: 78.3K Code, 17.0K Data, 95.3K Total
1409 Debug Version: 156.3K Code, 63.1K Data, 219.4K Total
1411 ----------------------------------------
1412 20 March 2007. Summary of changes for version 20070320:
1414 1) ACPI CA Core Subsystem:
1416 Implemented a change to the order of interpretation and evaluation of AML
1417 operand objects within the AML interpreter. The interpreter now evaluates
1418 operands in the order that they appear in the AML stream (and the
1419 corresponding ASL code), instead of in the reverse order (after the entire
1420 operand list has been parsed). The previous behavior caused several subtle
1421 incompatibilities with the Microsoft AML interpreter as well as being
1422 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
1424 Implemented a change to the ACPI Global Lock support. All interfaces to the
1425 global lock now allow the same thread to acquire the lock multiple times.
1426 This affects the AcpiAcquireGlobalLock external interface to the global lock
1427 as well as the internal use of the global lock to support AML fields -- a
1428 control method that is holding the global lock can now simultaneously access
1429 AML fields that require global lock protection. Previously, in both cases,
1430 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change to
1431 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
1432 Controller. There is no change to the behavior of the AML Acquire operator,
1433 as this can already be used to acquire a mutex multiple times by the same
1434 thread. BZ 8066. With assistance from Alexey Starikovskiy.
1436 Fixed a problem where invalid objects could be referenced in the AML
1437 Interpreter after error conditions. During operand evaluation, ensure that
1438 the internal "Return Object" field is cleared on error and only valid
1439 pointers are stored there. Caused occasional access to deleted objects that
1440 resulted in "large reference count" warning messages. Valery Podrezov.
1442 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur on
1443 deeply nested control method invocations. BZ 7873, local BZ 487. Valery
1446 Fixed an internal problem with the handling of result objects on the
1447 interpreter result stack. BZ 7872. Valery Podrezov.
1449 Removed obsolete code that handled the case where AML_NAME_OP is the target
1450 of a reference (Reference.Opcode). This code was no longer necessary. BZ
1451 7874. Valery Podrezov.
1453 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This was a
1454 remnant from the previously discontinued 16-bit support.
1456 Example Code and Data Size: These are the sizes for the OS-independent
1457 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1458 debug version of the code includes the debug output trace mechanism and has
1459 a much larger code and data size.
1462 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1463 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1465 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1466 Debug Version: 155.9K Code, 63.1K Data, 219.0K Total
1468 ----------------------------------------
1469 26 January 2007. Summary of changes for version 20070126:
1471 1) ACPI CA Core Subsystem:
1473 Added the 2007 copyright to all module headers and signons. This affects
1474 virtually every file in the ACPICA core subsystem, the iASL compiler, and
1477 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
1478 during a table load. A bad pointer was passed in the case where the DSDT is
1479 overridden, causing a fault in this case.
1481 Example Code and Data Size: These are the sizes for the OS-independent
1482 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1483 debug version of the code includes the debug output trace mechanism and has
1484 a much larger code and data size.
1487 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1488 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1490 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1491 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1493 ----------------------------------------
1494 15 December 2006. Summary of changes for version 20061215:
1496 1) ACPI CA Core Subsystem:
1498 Support for 16-bit ACPICA has been completely removed since it is no longer
1499 necessary and it clutters the code. All 16-bit macros, types, and
1500 conditional compiles have been removed, cleaning up and simplifying the code
1501 across the entire subsystem. DOS support is no longer needed since the
1502 bootable Linux firmware kit is now available.
1504 The handler for the Global Lock is now removed during AcpiTerminate to
1505 enable a clean subsystem restart, via the implementation of the
1506 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
1509 Implemented enhancements to the multithreading support within the debugger
1510 to enable improved multithreading debugging and evaluation of the subsystem.
1513 Debugger: Enhanced the Statistics/Memory command to emit the total (maximum)
1514 memory used during the execution, as well as the maximum memory consumed by
1515 each of the various object types. (Valery Podrezov)
1517 Example Code and Data Size: These are the sizes for the OS-independent
1518 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1519 debug version of the code includes the debug output trace mechanism and has
1520 a much larger code and data size.
1523 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
1524 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
1526 Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total
1527 Debug Version: 155.8K Code, 63.3K Data, 219.1K Total
1530 2) iASL Compiler/Disassembler and Tools:
1532 AcpiExec: Implemented a new option (-m) to display full memory use
1533 statistics upon subsystem/program termination. (Valery Podrezov)
1535 ----------------------------------------
1536 09 November 2006. Summary of changes for version 20061109:
1538 1) ACPI CA Core Subsystem:
1540 Optimized the Load ASL operator in the case where the source operand is an
1541 operation region. Simply map the operation region memory, instead of
1542 performing a bytewise read. (Region must be of type SystemMemory, see
1545 Fixed the Load ASL operator for the case where the source operand is a
1546 region field. A buffer object is also allowed as the source operand. BZ 480
1548 Fixed a problem where the Load ASL operator allowed the source operand to be
1549 an operation region of any type. It is now restricted to regions of type
1550 SystemMemory, as per the ACPI specification. BZ 481
1552 Additional cleanup and optimizations for the new Table Manager code.
1554 AcpiEnable will now fail if all of the required ACPI tables are not loaded
1555 (FADT, FACS, DSDT). BZ 477
1557 Added #pragma pack(8/4) to acobject.h to ensure that the structures in this
1558 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
1559 manually optimized to be aligned and will not work if it is byte-packed.
1561 Example Code and Data Size: These are the sizes for the OS-independent
1562 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1563 debug version of the code includes the debug output trace mechanism and has
1564 a much larger code and data size.
1567 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
1568 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
1570 Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total
1571 Debug Version: 155.2K Code, 63.1K Data, 218.3K Total
1574 2) iASL Compiler/Disassembler and Tools:
1576 Fixed a problem where the presence of the _OSI predefined control method
1577 within complex expressions could cause an internal compiler error.
1579 AcpiExec: Implemented full region support for multiple address spaces.
1580 SpaceId is now part of the REGION object. BZ 429
1582 ----------------------------------------
1583 11 October 2006. Summary of changes for version 20061011:
1585 1) ACPI CA Core Subsystem:
1587 Completed an AML interpreter performance enhancement for control method
1588 execution. Previously a 2-pass parse/execution, control methods are now
1589 completely parsed and executed in a single pass. This improves overall
1590 interpreter performance by ~25%, reduces code size, and reduces CPU stack
1591 use. (Valery Podrezov + interpreter changes in version 20051202 that
1592 eliminated namespace loading during the pass one parse.)
1594 Implemented _CID support for PCI Root Bridge detection. If the _HID does not
1595 match the predefined PCI Root Bridge IDs, the _CID list (if present) is now
1596 obtained and also checked for an ID match.
1598 Implemented additional support for the PCI _ADR execution: upsearch until a
1599 device scope is found before executing _ADR. This allows PCI_Config
1600 operation regions to be declared locally within control methods underneath
1603 Fixed a problem with a possible race condition between threads executing
1604 AcpiWalkNamespace and the AML interpreter. This condition was removed by
1605 modifying AcpiWalkNamespace to (by default) ignore all temporary namespace
1606 entries created during any concurrent control method execution. An
1607 additional namespace race condition is known to exist between
1608 AcpiWalkNamespace and the Load/Unload ASL operators and is still under
1611 Restructured the AML ParseLoop function, breaking it into several
1612 subfunctions in order to reduce CPU stack use and improve maintainability.
1615 AcpiGetHandle: Fix for parameter validation to detect invalid combinations
1616 of prefix handle and pathname. BZ 478
1618 Example Code and Data Size: These are the sizes for the OS-independent
1619 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1620 debug version of the code includes the debug output trace mechanism and has
1621 a much larger code and data size.
1624 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
1625 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
1627 Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total
1628 Debug Version: 155.4K Code, 63.1K Data, 218.5K Total
1630 2) iASL Compiler/Disassembler and Tools:
1632 Ported the -g option (get local ACPI tables) to the new ACPICA Table Manager
1633 to restore original behavior.
1635 ----------------------------------------
1636 27 September 2006. Summary of changes for version 20060927:
1638 1) ACPI CA Core Subsystem:
1640 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
1641 These functions now use a spinlock for mutual exclusion and the interrupt
1642 level indication flag is not needed.
1644 Fixed a problem with the Global Lock where the lock could appear to be
1645 obtained before it is actually obtained. The global lock semaphore was
1646 inadvertently created with one unit instead of zero units. (BZ 464) Fiodor
1649 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue during
1650 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
1652 Example Code and Data Size: These are the sizes for the OS-independent
1653 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1654 debug version of the code includes the debug output trace mechanism and has
1655 a much larger code and data size.
1658 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
1659 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
1661 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
1662 Debug Version: 154.6K Code, 63.0K Data, 217.6K Total
1665 2) iASL Compiler/Disassembler and Tools:
1667 Fixed a compilation problem with the pre-defined Resource Descriptor field
1668 names where an "object does not exist" error could be incorrectly generated
1669 if the parent ResourceTemplate pathname places the template within a
1670 different namespace scope than the current scope. (BZ 7212)
1672 Fixed a problem where the compiler could hang after syntax errors detected
1673 in an ElseIf construct. (BZ 453)
1675 Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
1676 operator. An incorrect output filename was produced when this parameter was
1677 a null string (""). Now, the original input filename is used as the AML
1678 output filename, with an ".aml" extension.
1680 Implemented a generic batch command mode for the AcpiExec utility (execute
1681 any AML debugger command) (Valery Podrezov).
1683 ----------------------------------------
1684 12 September 2006. Summary of changes for version 20060912:
1686 1) ACPI CA Core Subsystem:
1688 Enhanced the implementation of the "serialized mode" of the interpreter
1689 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
1690 specified, instead of creating a serialization semaphore per control method,
1691 the interpreter lock is simply no longer released before a blocking
1692 operation during control method execution. This effectively makes the AML
1693 Interpreter single-threaded. The overhead of a semaphore per-method is
1696 Fixed a regression where an error was no longer emitted if a control method
1697 attempts to create 2 objects of the same name. This once again returns
1698 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism that
1699 will dynamically serialize the control method to possible prevent future
1702 Integrated a fix for a problem with PCI Express HID detection in the PCI
1703 Config Space setup procedure. (BZ 7145)
1705 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
1706 AcpiHwInitialize function - the FADT registers are now validated when the
1709 Added two new warnings during FADT verification - 1) if the FADT is larger
1710 than the largest known FADT version, and 2) if there is a mismatch between a
1711 32-bit block address and the 64-bit X counterpart (when both are non-zero.)
1713 Example Code and Data Size: These are the sizes for the OS-independent
1714 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1715 debug version of the code includes the debug output trace mechanism and has
1716 a much larger code and data size.
1719 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
1720 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
1722 Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total
1723 Debug Version: 154.7K Code, 63.0K Data, 217.7K Total
1726 2) iASL Compiler/Disassembler and Tools:
1728 Fixed a problem with the implementation of the Switch() operator where the
1729 temporary variable was declared too close to the actual Switch, instead of
1730 at method level. This could cause a problem if the Switch() operator is
1731 within a while loop, causing an error on the second iteration. (BZ 460)
1733 Disassembler - fix for error emitted for unknown type for target of scope
1734 operator. Now, ignore it and continue.
1736 Disassembly of an FADT now verifies the input FADT and reports any errors
1737 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
1739 Disassembly of raw data buffers with byte initialization data now prefixes
1740 each output line with the current buffer offset.
1742 Disassembly of ASF! table now includes all variable-length data fields at
1743 the end of some of the subtables.
1745 The disassembler now emits a comment if a buffer appears to be a
1746 ResourceTemplate, but cannot be disassembled as such because the EndTag does
1747 not appear at the very end of the buffer.
1749 AcpiExec - Added the "-t" command line option to enable the serialized mode
1750 of the AML interpreter.
1752 ----------------------------------------
1753 31 August 2006. Summary of changes for version 20060831:
1755 1) ACPI CA Core Subsystem:
1757 Miscellaneous fixes for the Table Manager:
1758 - Correctly initialize internal common FADT for all 64-bit "X" fields
1759 - Fixed a couple table mapping issues during table load
1760 - Fixed a couple alignment issues for IA64
1761 - Initialize input array to zero in AcpiInitializeTables
1762 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
1765 Change for GPE support: when a "wake" GPE is received, all wake GPEs are now
1766 immediately disabled to prevent the waking GPE from firing again and to
1767 prevent other wake GPEs from interrupting the wake process.
1769 Added the AcpiGpeCount global that tracks the number of processed GPEs, to
1770 be used for debugging systems with a large number of ACPI interrupts.
1772 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
1773 both the ACPICA headers and the disassembler.
1775 Example Code and Data Size: These are the sizes for the OS-independent
1776 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1777 debug version of the code includes the debug output trace mechanism and has
1778 a much larger code and data size.
1781 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
1782 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
1784 Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total
1785 Debug Version: 154.9K Code, 62.6K Data, 217.5K Total
1788 2) iASL Compiler/Disassembler and Tools:
1790 Disassembler support for the DMAR ACPI table.
1792 ----------------------------------------
1793 23 August 2006. Summary of changes for version 20060823:
1795 1) ACPI CA Core Subsystem:
1797 The Table Manager component has been completely redesigned and
1798 reimplemented. The new design is much simpler, and reduces the overall code
1799 and data size of the kernel-resident ACPICA by approximately 5%. Also, it is
1800 now possible to obtain the ACPI tables very early during kernel
1801 initialization, even before dynamic memory management is initialized.
1802 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
1804 Obsolete ACPICA interfaces:
1806 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel init
1808 - AcpiLoadTable: Not needed.
1809 - AcpiUnloadTable: Not needed.
1811 New ACPICA interfaces:
1813 - AcpiInitializeTables: Must be called before the table manager can be used.
1814 - AcpiReallocateRootTable: Used to transfer the root table to dynamically
1815 allocated memory after it becomes available.
1816 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI tables
1819 Other ACPICA changes:
1821 - AcpiGetTableHeader returns the actual mapped table header, not a copy. Use
1822 AcpiOsUnmapMemory to free this mapping.
1823 - AcpiGetTable returns the actual mapped table. The mapping is managed
1824 internally and must not be deleted by the caller. Use of this interface
1825 causes no additional dynamic memory allocation.
1826 - AcpiFindRootPointer: Support for physical addressing has been eliminated,
1827 it appeared to be unused.
1828 - The interface to AcpiOsMapMemory has changed to be consistent with the
1829 other allocation interfaces.
1830 - The interface to AcpiOsGetRootPointer has changed to eliminate unnecessary
1832 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on 64-
1833 bit platforms. Was previously 64 bits on all platforms.
1834 - The interface to the ACPI Global Lock acquire/release macros have changed
1835 slightly since ACPICA no longer keeps a local copy of the FACS with a
1836 constructed pointer to the actual global lock.
1838 Porting to the new table manager:
1840 - AcpiInitializeTables: Must be called once, and can be called anytime
1841 during the OS initialization process. It allows the host to specify an area
1842 of memory to be used to store the internal version of the RSDT/XSDT (root
1843 table). This allows the host to access ACPI tables before memory management
1844 is initialized and running.
1845 - AcpiReallocateRootTable: Can be called after memory management is running
1846 to copy the root table to a dynamically allocated array, freeing up the
1847 scratch memory specified in the call to AcpiInitializeTables.
1848 - AcpiSubsystemInitialize: This existing interface is independent of the
1849 Table Manager, and does not have to be called before the Table Manager can
1850 be used, it only must be called before the rest of ACPICA can be used.
1851 - ACPI Tables: Some changes have been made to the names and structure of the
1852 actbl.h and actbl1.h header files and may require changes to existing code.
1853 For example, bitfields have been completely removed because of their lack of
1854 portability across C compilers.
1855 - Update interfaces to the Global Lock acquire/release macros if local
1856 versions are used. (see acwin.h)
1858 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
1862 Example Code and Data Size: These are the sizes for the OS-independent
1863 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1864 debug version of the code includes the debug output trace mechanism and has
1865 a much larger code and data size.
1868 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
1869 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
1871 Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total
1872 Debug Version: 154.6K Code, 62.3K Data, 216.9K Total
1875 2) iASL Compiler/Disassembler and Tools:
1877 No changes for this release.
1879 ----------------------------------------
1880 21 July 2006. Summary of changes for version 20060721:
1882 1) ACPI CA Core Subsystem:
1884 The full source code for the ASL test suite used to validate the iASL
1885 compiler and the ACPICA core subsystem is being released with the ACPICA
1886 source for the first time. The source is contained in a separate package and
1887 consists of over 1100 files that exercise all ASL/AML operators. The package
1888 should appear on the Intel/ACPI web site shortly. (Valery Podrezov, Fiodor
1891 Completed a new design and implementation for support of the ACPI Global
1892 Lock. On the OS side, the global lock is now treated as a standard AML
1893 mutex. Previously, multiple OS threads could "acquire" the global lock
1894 simultaneously. However, this could cause the BIOS to be starved out of the
1895 lock - especially in cases such as the Embedded Controller driver where
1896 there is a tight coupling between the OS and the BIOS.
1898 Implemented an optimization for the ACPI Global Lock interrupt mechanism.
1899 The Global Lock interrupt handler no longer queues the execution of a
1900 separate thread to signal the global lock semaphore. Instead, the semaphore
1901 is signaled directly from the interrupt handler.
1903 Implemented support within the AML interpreter for package objects that
1904 contain a larger AML length (package list length) than the package element
1905 count. In this case, the length of the package is truncated to match the
1906 package element count. Some BIOS code apparently modifies the package length
1907 on the fly, and this change supports this behavior. Provides compatibility
1908 with the MS AML interpreter. (With assistance from Fiodor Suietov)
1910 Implemented a temporary fix for the BankValue parameter of a Bank Field to
1911 support all constant values, now including the Zero and One opcodes.
1912 Evaluation of this parameter must eventually be converted to a full TermArg
1913 evaluation. A not-implemented error is now returned (temporarily) for non-
1914 constant values for this parameter.
1916 Fixed problem reports (Fiodor Suietov) integrated:
1917 - Fix for premature object deletion after CopyObject on Operation Region (BZ
1920 Example Code and Data Size: These are the sizes for the OS-independent
1921 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1922 debug version of the code includes the debug output trace mechanism and has
1923 a much larger code and data size.
1926 Non-Debug Version: 80.7K Code, 18.0K Data, 98.7K Total
1927 Debug Version: 160.9K Code, 65.1K Data, 226.0K Total
1929 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
1930 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
1933 2) iASL Compiler/Disassembler and Tools:
1935 No changes for this release.
1937 ----------------------------------------
1938 07 July 2006. Summary of changes for version 20060707:
1940 1) ACPI CA Core Subsystem:
1942 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
1943 that do not allow the initialization of address pointers within packed
1944 structures - even though the hardware itself may support misaligned
1945 transfers. Some of the debug data structures are packed by default to
1948 Added an error message for the case where AcpiOsGetThreadId() returns zero.
1949 A non-zero value is required by the core ACPICA code to ensure the proper
1950 operation of AML mutexes and recursive control methods.
1952 The DSDT is now the only ACPI table that determines whether the AML
1953 interpreter is in 32-bit or 64-bit mode. Not really a functional change, but
1954 the hooks for per-table 32/64 switching have been removed from the code. A
1955 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
1957 Fixed a possible leak of an OwnerID in the error path of
1958 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
1959 deletion to a single place in AcpiTbUninstallTable to correct possible leaks
1960 when using the AcpiTbDeleteTablesByType interface (with assistance from
1963 Fixed a problem with Serialized control methods where the semaphore
1964 associated with the method could be over-signaled after multiple method
1967 Fixed two issues with the locking of the internal namespace data structure.
1968 Both the Unload() operator and AcpiUnloadTable interface now lock the
1969 namespace during the namespace deletion associated with the table unload
1970 (with assistance from Linn Crosetto.)
1972 Fixed problem reports (Valery Podrezov) integrated:
1973 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
1975 Fixed problem reports (Fiodor Suietov) integrated:
1976 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
1977 - On Address Space handler deletion, needless deactivation call (BZ 374)
1978 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375)
1979 - Possible memory leak, Notify sub-objects of Processor, Power, ThermalZone
1981 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
1982 - Minimum Length of RSDT should be validated (BZ 379)
1983 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
1985 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type loaded
1988 Example Code and Data Size: These are the sizes for the OS-independent
1989 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
1990 debug version of the code includes the debug output trace mechanism and has
1991 a much larger code and data size.
1994 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
1995 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
1997 Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total
1998 Debug Version: 161.0K Code, 65.1K Data, 226.1K Total
2001 2) iASL Compiler/Disassembler and Tools:
2003 Fixed problem reports:
2004 Compiler segfault when ASL contains a long (>1024) String declaration (BZ
2007 ----------------------------------------
2008 23 June 2006. Summary of changes for version 20060623:
2010 1) ACPI CA Core Subsystem:
2012 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
2013 allows the type to be customized to the host OS for improved efficiency
2014 (since a spinlock is usually a very small object.)
2016 Implemented support for "ignored" bits in the ACPI registers. According to
2017 the ACPI specification, these bits should be preserved when writing the
2018 registers via a read/modify/write cycle. There are 3 bits preserved in this
2019 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
2021 Implemented the initial deployment of new OSL mutex interfaces. Since some
2022 host operating systems have separate mutex and semaphore objects, this
2023 feature was requested. The base code now uses mutexes (and the new mutex
2024 interfaces) wherever a binary semaphore was used previously. However, for
2025 the current release, the mutex interfaces are defined as macros to map them
2026 to the existing semaphore interfaces. Therefore, no OSL changes are required
2027 at this time. (See acpiosxf.h)
2029 Fixed several problems with the support for the control method SyncLevel
2030 parameter. The SyncLevel now works according to the ACPI specification and
2031 in concert with the Mutex SyncLevel parameter, since the current SyncLevel
2032 is a property of the executing thread. Mutual exclusion for control methods
2033 is now implemented with a mutex instead of a semaphore.
2035 Fixed three instances of the use of the C shift operator in the bitfield
2036 support code (exfldio.c) to avoid the use of a shift value larger than the
2037 target data width. The behavior of C compilers is undefined in this case and
2038 can cause unpredictable results, and therefore the case must be detected and
2039 avoided. (Fiodor Suietov)
2041 Added an info message whenever an SSDT or OEM table is loaded dynamically
2042 via the Load() or LoadTable() ASL operators. This should improve debugging
2043 capability since it will show exactly what tables have been loaded (beyond
2044 the tables present in the RSDT/XSDT.)
2046 Example Code and Data Size: These are the sizes for the OS-independent
2047 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2048 debug version of the code includes the debug output trace mechanism and has
2049 a much larger code and data size.
2052 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2053 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2055 Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total
2056 Debug Version: 160.8K Code, 64.8K Data, 225.6K Total
2059 2) iASL Compiler/Disassembler and Tools:
2061 No changes for this release.
2063 ----------------------------------------
2064 08 June 2006. Summary of changes for version 20060608:
2066 1) ACPI CA Core Subsystem:
2068 Converted the locking mutex used for the ACPI hardware to a spinlock. This
2069 change should eliminate all problems caused by attempting to acquire a
2070 semaphore at interrupt level, and it means that all ACPICA external
2071 interfaces that directly access the ACPI hardware can be safely called from
2072 interrupt level. OSL code that implements the semaphore interfaces should be
2073 able to eliminate any workarounds for being called at interrupt level.
2075 Fixed a regression introduced in 20060526 where the ACPI device
2076 initialization could be prematurely aborted with an AE_NOT_FOUND if a device
2077 did not have an optional _INI method.
2079 Fixed an IndexField issue where a write to the Data Register should be
2080 limited in size to the AccessSize (width) of the IndexField itself. (BZ 433,
2083 Fixed problem reports (Valery Podrezov) integrated:
2084 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
2086 Fixed problem reports (Fiodor Suietov) integrated:
2087 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
2089 Removed four global mutexes that were obsolete and were no longer being
2092 Example Code and Data Size: These are the sizes for the OS-independent
2093 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2094 debug version of the code includes the debug output trace mechanism and has
2095 a much larger code and data size.
2098 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2099 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2101 Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total
2102 Debug Version: 160.2K Code, 64.7K Data, 224.9K Total
2105 2) iASL Compiler/Disassembler and Tools:
2107 Fixed a fault when using -g option (get tables from registry) on Windows
2110 Fixed problem reports integrated:
2111 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
2112 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
2114 - Global table revision override (-r) is ignored (BZ 413)
2116 ----------------------------------------
2117 26 May 2006. Summary of changes for version 20060526:
2119 1) ACPI CA Core Subsystem:
2121 Restructured, flattened, and simplified the internal interfaces for
2122 namespace object evaluation - resulting in smaller code, less CPU stack use,
2123 and fewer interfaces. (With assistance from Mikhail Kouzmich)
2125 Fixed a problem with the CopyObject operator where the first parameter was
2126 not typed correctly for the parser, interpreter, compiler, and disassembler.
2127 Caused various errors and unexpected behavior.
2129 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
2130 produced incorrect results with some C compilers. Since the behavior of C
2131 compilers when the shift value is larger than the datatype width is
2132 apparently not well defined, the interpreter now detects this condition and
2133 simply returns zero as expected in all such cases. (BZ 395)
2135 Fixed problem reports (Valery Podrezov) integrated:
2136 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
2137 - Allow interpreter to handle nested method declarations (BZ 5361)
2139 Fixed problem reports (Fiodor Suietov) integrated:
2140 - AcpiTerminate doesn't free debug memory allocation list objects (BZ 355)
2141 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ 356)
2142 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
2143 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
2144 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
2145 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
2146 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
2147 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
2148 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ 365)
2149 - Status of the Global Initialization Handler call not used (BZ 366)
2150 - Incorrect object parameter to Global Initialization Handler (BZ 367)
2152 Example Code and Data Size: These are the sizes for the OS-independent
2153 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2154 debug version of the code includes the debug output trace mechanism and has
2155 a much larger code and data size.
2158 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2159 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2161 Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total
2162 Debug Version: 160.3K Code, 64.9K Data, 225.2K Total
2165 2) iASL Compiler/Disassembler and Tools:
2167 Modified the parser to allow the names IO, DMA, and IRQ to be used as
2168 namespace identifiers with no collision with existing resource descriptor
2169 macro names. This provides compatibility with other ASL compilers and is
2170 most useful for disassembly/recompilation of existing tables without parse
2171 errors. (With assistance from Thomas Renninger)
2173 Disassembler: fixed an incorrect disassembly problem with the
2174 DataTableRegion and CopyObject operators. Fixed a possible fault during
2175 disassembly of some Alias operators.
2177 ----------------------------------------
2178 12 May 2006. Summary of changes for version 20060512:
2180 1) ACPI CA Core Subsystem:
2182 Replaced the AcpiOsQueueForExecution interface with a new interface named
2183 AcpiOsExecute. The major difference is that the new interface does not have
2184 a Priority parameter, this appeared to be useless and has been replaced by a
2185 Type parameter. The Type tells the host what type of execution is being
2186 requested, such as global lock handler, notify handler, GPE handler, etc.
2187 This allows the host to queue and execute the request as appropriate for the
2188 request type, possibly using different work queues and different priorities
2189 for the various request types. This enables fixes for multithreading
2190 deadlock problems such as BZ #5534, and will require changes to all existing
2191 OS interface layers. (Alexey Starikovskiy and Bob Moore)
2193 Fixed a possible memory leak associated with the support for the so-called
2194 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
2197 Fixed a problem with the Load() operator where a table load from an
2198 operation region could overwrite an internal table buffer by up to 7 bytes
2199 and cause alignment faults on IPF systems. (With assistance from Luming Yu)
2201 Example Code and Data Size: These are the sizes for the OS-independent
2202 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2203 debug version of the code includes the debug output trace mechanism and has
2204 a much larger code and data size.
2207 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2208 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2210 Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total
2211 Debug Version: 160.5K Code, 65.1K Data, 225.6K Total
2215 2) iASL Compiler/Disassembler and Tools:
2217 Disassembler: Implemented support to cross reference the internal namespace
2218 and automatically generate ASL External() statements for symbols not defined
2219 within the current table being disassembled. This will simplify the
2220 disassembly and recompilation of interdependent tables such as SSDTs since
2221 these statements will no longer have to be added manually.
2223 Disassembler: Implemented experimental support to automatically detect
2224 invocations of external control methods and generate appropriate External()
2225 statements. This is problematic because the AML cannot be correctly parsed
2226 until the number of arguments for each control method is known. Currently,
2227 standalone method invocations and invocations as the source operand of a
2228 Store() statement are supported.
2230 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
2231 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
2232 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
2233 more readable and likely closer to the original ASL source.
2235 ----------------------------------------
2236 21 April 2006. Summary of changes for version 20060421:
2238 1) ACPI CA Core Subsystem:
2240 Removed a device initialization optimization introduced in 20051216 where
2241 the _STA method was not run unless an _INI was also present for the same
2242 device. This optimization could cause problems because it could allow _INI
2243 methods to be run within a not-present device subtree. (If a not-present
2244 device had no _INI, _STA would not be run, the not-present status would not
2245 be discovered, and the children of the device would be incorrectly
2248 Implemented a new _STA optimization where namespace subtrees that do not
2249 contain _INI are identified and ignored during device initialization.
2250 Selectively running _STA can significantly improve boot time on large
2251 machines (with assistance from Len Brown.)
2253 Implemented support for the device initialization case where the returned
2254 _STA flags indicate a device not-present but functioning. In this case, _INI
2255 is not run, but the device children are examined for presence, as per the
2258 Implemented an additional change to the IndexField support in order to
2259 conform to MS behavior. The value written to the Index Register is not
2260 simply a byte offset, it is a byte offset in units of the access width of
2261 the parent Index Field. (Fiodor Suietov)
2263 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
2264 interface is called during the creation of all AML operation regions, and
2265 allows the host OS to exert control over what addresses it will allow the
2266 AML code to access. Operation Regions whose addresses are disallowed will
2267 cause a runtime exception when they are actually accessed (will not affect
2268 or abort table loading.) See oswinxf or osunixxf for an example
2271 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
2272 interface allows the host OS to match the various "optional"
2273 interface/behavior strings for the _OSI predefined control method as
2274 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
2275 for an example implementation.
2277 Restructured and corrected various problems in the exception handling code
2278 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
2279 (with assistance from Takayoshi Kochi.)
2281 Modified the Linux source converter to ignore quoted string literals while
2282 converting identifiers from mixed to lower case. This will correct problems
2283 with the disassembler and other areas where such strings must not be
2286 The ACPI_FUNCTION_* macros no longer require quotes around the function
2287 name. This allows the Linux source converter to convert the names, now that
2288 the converter ignores quoted strings.
2290 Example Code and Data Size: These are the sizes for the OS-independent
2291 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2292 debug version of the code includes the debug output trace mechanism and has
2293 a much larger code and data size.
2297 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2298 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2300 Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total
2301 Debug Version: 160.1K Code, 65.2K Data, 225.3K Total
2304 2) iASL Compiler/Disassembler and Tools:
2306 Implemented 3 new warnings for iASL, and implemented multiple warning levels
2309 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is not
2310 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
2311 check for the possible timeout, a warning is issued.
2313 2) Useless operators: If an ASL operator does not specify an optional target
2314 operand and it also does not use the function return value from the
2315 operator, a warning is issued since the operator effectively does nothing.
2317 3) Unreferenced objects: If a namespace object is created, but never
2318 referenced, a warning is issued. This is a warning level 2 since there are
2319 cases where this is ok, such as when a secondary table is loaded that uses
2320 the unreferenced objects. Even so, care is taken to only flag objects that
2321 don't look like they will ever be used. For example, the reserved methods
2322 (starting with an underscore) are usually not referenced because it is
2323 expected that the OS will invoke them.
2325 ----------------------------------------
2326 31 March 2006. Summary of changes for version 20060331:
2328 1) ACPI CA Core Subsystem:
2330 Implemented header file support for the following additional ACPI tables:
2331 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this support,
2332 all current and known ACPI tables are now defined in the ACPICA headers and
2333 are available for use by device drivers and other software.
2335 Implemented support to allow tables that contain ACPI names with invalid
2336 characters to be loaded. Previously, this would cause the table load to
2337 fail, but since there are several known cases of such tables on existing
2338 machines, this change was made to enable ACPI support for them. Also, this
2339 matches the behavior of the Microsoft ACPI implementation.
2341 Fixed a couple regressions introduced during the memory optimization in the
2342 20060317 release. The namespace node definition required additional
2343 reorganization and an internal datatype that had been changed to 8-bit was
2344 restored to 32-bit. (Valery Podrezov)
2346 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
2347 could be passed through to AcpiOsReleaseObject which is unexpected. Such
2348 null pointers are now trapped and ignored, matching the behavior of the
2349 previous implementation before the deployment of AcpiOsReleaseObject.
2350 (Valery Podrezov, Fiodor Suietov)
2352 Fixed a memory mapping leak during the deletion of a SystemMemory operation
2353 region where a cached memory mapping was not deleted. This became a
2354 noticeable problem for operation regions that are defined within frequently
2355 used control methods. (Dana Meyers)
2357 Reorganized the ACPI table header files into two main files: one for the
2358 ACPI tables consumed by the ACPICA core, and another for the miscellaneous
2359 ACPI tables that are consumed by the drivers and other software. The various
2360 FADT definitions were merged into one common section and three different
2361 tables (ACPI 1.0, 1.0+, and 2.0)
2363 Example Code and Data Size: These are the sizes for the OS-independent
2364 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
2365 debug version of the code includes the debug output trace mechanism and has
2366 a much larger code and data size.
2369 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
2370 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
2372 Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total
2373 Debug Version: 158.9K Code, 64.9K Data, 223.8K Total
2376 2) iASL Compiler/Disassembler and Tools:
2378 Disassembler: Implemented support to decode and format all non-AML ACPI
2379 tables (tables other than DSDTs and SSDTs.) This includes the new tables
2380 added to the ACPICA headers, therefore all current and known ACPI tables are
2383 Disassembler: The change to allow ACPI names with invalid characters also
2384 enables the disassembly of such tables. Invalid characters within names are
2385 changed to '*' to make the name printable; the iASL compiler will still
2386 generate an error for such names, however, since this is an invalid ACPI
2389 Implemented an option for AcpiXtract (-a) to extract all tables found in the
2390 input file. The default invocation extracts only the DSDTs and SSDTs.
2392 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
2393 makefile for the AcpiXtract utility.
2395 ----------------------------------------
2396 17 March 2006. Summary of changes for version 20060317:
2398 1) ACPI CA Core Subsystem:
2400 Implemented the use of a cache object for all internal namespace nodes.
2401 Since there are about 1000 static nodes in a typical system, this will
2402 decrease memory use for cache implementations that minimize per-allocation
2403 overhead (such as a slab allocator.)
2405 Removed the reference count mechanism for internal namespace nodes, since it
2406 was deemed unnecessary. This reduces the size of each namespace node by
2407 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit case,
2408 and 32 bytes for the 64-bit case.
2410 Optimized several internal data structures to reduce object size on 64-bit
2411 platforms by packing data within the 64-bit alignment. This includes the
2412 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
2413 instances corresponding to the namespace objects.
2415 Added two new strings for the predefined _OSI method: "Windows 2001.1 SP1"
2418 Split the allocation tracking mechanism out to a separate file, from
2419 utalloc.c to uttrack.c. This mechanism appears to be only useful for
2420 application-level code. Kernels may wish to not include uttrack.c in
2423 Removed all remnants of the obsolete ACPI_REPORT_* macros and the associated
2424 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
2427 Code and Data Size: These are the sizes for the acpica.lib produced by the
2428 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2429 driver or OSPM code. The debug version of the code includes the debug output
2430 trace mechanism and has a much larger code and data size. Note that these
2431 values will vary depending on the efficiency of the compiler and the
2432 compiler options used during generation.
2435 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2436 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
2438 Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total
2439 Debug Version: 158.7K Code, 64.8K Data, 223.5K Total
2442 2) iASL Compiler/Disassembler and Tools:
2444 Implemented an ANSI C version of the acpixtract utility. This version will
2445 automatically extract the DSDT and all SSDTs from the input acpidump text
2446 file and dump the binary output to separate files. It can also display a
2447 summary of the input file including the headers for each table found and
2448 will extract any single ACPI table, with any signature. (See
2449 source/tools/acpixtract)
2451 ----------------------------------------
2452 10 March 2006. Summary of changes for version 20060310:
2454 1) ACPI CA Core Subsystem:
2456 Tagged all external interfaces to the subsystem with the new
2457 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to assist
2458 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
2459 macro. The default definition is NULL.
2461 Added the ACPI_THREAD_ID type for the return value from AcpiOsGetThreadId.
2462 This allows the host to define this as necessary to simplify kernel
2463 integration. The default definition is ACPI_NATIVE_UINT.
2465 Fixed two interpreter problems related to error processing, the deletion of
2466 objects, and placing invalid pointers onto the internal operator result
2467 stack. BZ 6028, 6151 (Valery Podrezov)
2469 Increased the reference count threshold where a warning is emitted for large
2470 reference counts in order to eliminate unnecessary warnings on systems with
2471 large namespaces (especially 64-bit.) Increased the value from 0x400 to
2474 Due to universal disagreement as to the meaning of the 'c' in the calloc()
2475 function, the ACPI_MEM_CALLOCATE macro has been renamed to
2476 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
2477 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
2480 Code and Data Size: These are the sizes for the acpica.lib produced by the
2481 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2482 driver or OSPM code. The debug version of the code includes the debug output
2483 trace mechanism and has a much larger code and data size. Note that these
2484 values will vary depending on the efficiency of the compiler and the
2485 compiler options used during generation.
2488 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
2489 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
2491 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2492 Debug Version: 161.6K Code, 65.7K Data, 227.3K Total
2495 2) iASL Compiler/Disassembler:
2497 Disassembler: implemented support for symbolic resource descriptor
2498 references. If a CreateXxxxField operator references a fixed offset within a
2499 resource descriptor, a name is assigned to the descriptor and the offset is
2500 translated to the appropriate resource tag and pathname. The addition of
2501 this support brings the disassembled code very close to the original ASL
2502 source code and helps eliminate run-time errors when the disassembled code
2503 is modified (and recompiled) in such a way as to invalidate the original
2506 Implemented support for a Descriptor Name as the last parameter to the ASL
2507 Register() macro. This parameter was inadvertently left out of the ACPI
2508 specification, and will be added for ACPI 3.0b.
2510 Fixed a problem where the use of the "_OSI" string (versus the full path
2511 "\_OSI") caused an internal compiler error. ("No back ptr to op")
2513 Fixed a problem with the error message that occurs when an invalid string is
2514 used for a _HID object (such as one with an embedded asterisk: "*PNP010A".)
2515 The correct message is now displayed.
2517 ----------------------------------------
2518 17 February 2006. Summary of changes for version 20060217:
2520 1) ACPI CA Core Subsystem:
2522 Implemented a change to the IndexField support to match the behavior of the
2523 Microsoft AML interpreter. The value written to the Index register is now a
2524 byte offset, no longer an index based upon the width of the Data register.
2525 This should fix IndexField problems seen on some machines where the Data
2526 register is not exactly one byte wide. The ACPI specification will be
2527 clarified on this point.
2529 Fixed a problem where several resource descriptor types could overrun the
2530 internal descriptor buffer due to size miscalculation: VendorShort,
2531 VendorLong, and Interrupt. This was noticed on IA64 machines, but could
2532 affect all platforms.
2534 Fixed a problem where individual resource descriptors were misaligned within
2535 the internal buffer, causing alignment faults on IA64 platforms.
2537 Code and Data Size: These are the sizes for the acpica.lib produced by the
2538 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any ACPI
2539 driver or OSPM code. The debug version of the code includes the debug output
2540 trace mechanism and has a much larger code and data size. Note that these
2541 values will vary depending on the efficiency of the compiler and the
2542 compiler options used during generation.
2545 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2546 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
2548 Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total
2549 Debug Version: 161.4K Code, 65.7K Data, 227.1K Total
2552 2) iASL Compiler/Disassembler:
2554 Implemented support for new reserved names: _WDG and _WED are Microsoft
2555 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
2556 defined method (Throttling Depth Limit.)
2558 Fixed a problem where a zero-length VendorShort or VendorLong resource
2559 descriptor was incorrectly emitted as a descriptor of length one.
2561 ----------------------------------------
2562 10 February 2006. Summary of changes for version 20060210:
2564 1) ACPI CA Core Subsystem:
2566 Removed a couple of extraneous ACPI_ERROR messages that appeared during
2567 normal execution. These became apparent after the conversion from
2570 Fixed a problem where the CreateField operator could hang if the BitIndex or
2571 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
2573 Fixed a problem where a DeRefOf operation on a buffer object incorrectly
2574 failed with an exception. This also fixes a couple of related RefOf and
2575 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
2577 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead of
2578 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov, BZ
2581 Implemented a memory cleanup at the end of the execution of each iteration
2582 of an AML While() loop, preventing the accumulation of outstanding objects.
2583 (Valery Podrezov, BZ 5427)
2585 Eliminated a chunk of duplicate code in the object resolution code. (Valery
2588 Fixed several warnings during the 64-bit code generation.
2590 The AcpiSrc source code conversion tool now inserts one line of whitespace
2591 after an if() statement that is followed immediately by a comment, improving
2592 readability of the Linux code.
2594 Code and Data Size: The current and previous library sizes for the core
2595 subsystem are shown below. These are the code and data sizes for the
2596 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2597 values do not include any ACPI driver or OSPM code. The debug version of the
2598 code includes the debug output trace mechanism and has a much larger code
2599 and data size. Note that these values will vary depending on the efficiency
2600 of the compiler and the compiler options used during generation.
2603 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
2604 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
2606 Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total
2607 Debug Version: 161.3K Code, 65.6K Data, 226.9K Total
2610 2) iASL Compiler/Disassembler:
2612 Fixed a problem with the disassembly of a BankField operator with a complex
2613 expression for the BankValue parameter.
2615 ----------------------------------------
2616 27 January 2006. Summary of changes for version 20060127:
2618 1) ACPI CA Core Subsystem:
2620 Implemented support in the Resource Manager to allow unresolved namestring
2621 references within resource package objects for the _PRT method. This support
2622 is in addition to the previously implemented unresolved reference support
2623 within the AML parser. If the interpreter slack mode is enabled, these
2624 unresolved references will be passed through to the caller as a NULL package
2627 Implemented and deployed new macros and functions for error and warning
2628 messages across the subsystem. These macros are simpler and generate less
2629 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
2630 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
2631 macros remain defined to allow ACPI drivers time to migrate to the new
2634 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of the
2635 Acquire/Release Lock OSL interfaces.
2637 Fixed a problem where Alias ASL operators are sometimes not correctly
2638 resolved, in both the interpreter and the iASL compiler.
2640 Fixed several problems with the implementation of the ConcatenateResTemplate
2641 ASL operator. As per the ACPI specification, zero length buffers are now
2642 treated as a single EndTag. One-length buffers always cause a fatal
2643 exception. Non-zero length buffers that do not end with a full 2-byte EndTag
2644 cause a fatal exception.
2646 Fixed a possible structure overwrite in the AcpiGetObjectInfo external
2647 interface. (With assistance from Thomas Renninger)
2649 Code and Data Size: The current and previous library sizes for the core
2650 subsystem are shown below. These are the code and data sizes for the
2651 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2652 values do not include any ACPI driver or OSPM code. The debug version of the
2653 code includes the debug output trace mechanism and has a much larger code
2654 and data size. Note that these values will vary depending on the efficiency
2655 of the compiler and the compiler options used during generation.
2658 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
2659 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
2661 Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total
2662 Debug Version: 161.3K Code, 65.7K Data, 227.0K Total
2665 2) iASL Compiler/Disassembler:
2667 Fixed an internal error that was generated for any forward references to ASL
2670 ----------------------------------------
2671 13 January 2006. Summary of changes for version 20060113:
2673 1) ACPI CA Core Subsystem:
2675 Added 2006 copyright to all module headers and signons. This affects
2676 virtually every file in the ACPICA core subsystem, iASL compiler, and the
2679 Enhanced the ACPICA error reporting in order to simplify user migration to
2680 the non-debug version of ACPICA. Replaced all instances of the
2681 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN debug
2682 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
2683 respectively. This preserves all error and warning messages in the non-debug
2684 version of the ACPICA code (this has been referred to as the "debug lite"
2685 option.) Over 200 cases were converted to create a total of over 380
2686 error/warning messages across the ACPICA code. This increases the code and
2687 data size of the default non-debug version of the code somewhat (about 13K),
2688 but all error/warning reporting may be disabled if desired (and code
2689 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
2690 configuration option. The size of the debug version of ACPICA remains about
2693 Fixed a memory leak within the AML Debugger "Set" command. One object was
2694 not properly deleted for every successful invocation of the command.
2696 Code and Data Size: The current and previous library sizes for the core
2697 subsystem are shown below. These are the code and data sizes for the
2698 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2699 values do not include any ACPI driver or OSPM code. The debug version of the
2700 code includes the debug output trace mechanism and has a much larger code
2701 and data size. Note that these values will vary depending on the efficiency
2702 of the compiler and the compiler options used during generation.
2705 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
2706 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
2708 Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total
2709 Debug Version: 163.2K Code, 66.2K Data, 229.4K Total
2712 2) iASL Compiler/Disassembler:
2714 The compiler now officially supports the ACPI 3.0a specification that was
2715 released on December 30, 2005. (Specification is available at www.acpi.info)
2717 ----------------------------------------
2718 16 December 2005. Summary of changes for version 20051216:
2720 1) ACPI CA Core Subsystem:
2722 Implemented optional support to allow unresolved names within ASL Package
2723 objects. A null object is inserted in the package when a named reference
2724 cannot be located in the current namespace. Enabled via the interpreter
2725 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on machines
2726 that contain such code.
2728 Implemented an optimization to the initialization sequence that can improve
2729 boot time. During ACPI device initialization, the _STA method is now run if
2730 and only if the _INI method exists. The _STA method is used to determine if
2731 the device is present; An _INI can only be run if _STA returns present, but
2732 it is a waste of time to run the _STA method if the _INI does not exist.
2733 (Prototype and assistance from Dong Wei)
2735 Implemented use of the C99 uintptr_t for the pointer casting macros if it is
2736 available in the current compiler. Otherwise, the default (void *) cast is
2739 Fixed some possible memory leaks found within the execution path of the
2740 Break, Continue, If, and CreateField operators. (Valery Podrezov)
2742 Fixed a problem introduced in the 20051202 release where an exception is
2743 generated during method execution if a control method attempts to declare
2746 Moved resource descriptor string constants that are used by both the AML
2747 disassembler and AML debugger to the common utilities directory so that
2748 these components are independent.
2750 Implemented support in the AcpiExec utility (-e switch) to globally ignore
2751 exceptions during control method execution (method is not aborted.)
2753 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
2756 Code and Data Size: The current and previous library sizes for the core
2757 subsystem are shown below. These are the code and data sizes for the
2758 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2759 values do not include any ACPI driver or OSPM code. The debug version of the
2760 code includes the debug output trace mechanism and has a much larger code
2761 and data size. Note that these values will vary depending on the efficiency
2762 of the compiler and the compiler options used during generation.
2765 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
2766 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
2768 Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total
2769 Debug Version: 163.7K Code, 67.5K Data, 231.2K Total
2772 2) iASL Compiler/Disassembler:
2774 Fixed a problem where a CPU stack overflow fault could occur if a recursive
2775 method call was made from within a Return statement.
2777 ----------------------------------------
2778 02 December 2005. Summary of changes for version 20051202:
2780 1) ACPI CA Core Subsystem:
2782 Modified the parsing of control methods to no longer create namespace
2783 objects during the first pass of the parse. Objects are now created only
2784 during the execute phase, at the moment the namespace creation operator is
2785 encountered in the AML (Name, OperationRegion, CreateByteField, etc.) This
2786 should eliminate ALREADY_EXISTS exceptions seen on some machines where
2787 reentrant control methods are protected by an AML mutex. The mutex will now
2788 correctly block multiple threads from attempting to create the same object
2791 Increased the number of available Owner Ids for namespace object tracking
2792 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen on
2793 some machines with a large number of ACPI tables (either static or dynamic).
2795 Fixed a problem with the AcpiExec utility where a fault could occur when the
2796 -b switch (batch mode) is used.
2798 Enhanced the namespace dump routine to output the owner ID for each
2801 Code and Data Size: The current and previous library sizes for the core
2802 subsystem are shown below. These are the code and data sizes for the
2803 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2804 values do not include any ACPI driver or OSPM code. The debug version of the
2805 code includes the debug output trace mechanism and has a much larger code
2806 and data size. Note that these values will vary depending on the efficiency
2807 of the compiler and the compiler options used during generation.
2810 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
2811 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
2813 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
2814 Debug Version: 163.2K Code, 67.4K Data, 230.6K Total
2817 2) iASL Compiler/Disassembler:
2819 Fixed a parse error during compilation of certain Switch/Case constructs. To
2820 simplify the parse, the grammar now allows for multiple Default statements
2821 and this error is now detected and flagged during the analysis phase.
2823 Disassembler: The disassembly now includes the contents of the original
2824 table header within a comment at the start of the file. This includes the
2825 name and version of the original ASL compiler.
2827 ----------------------------------------
2828 17 November 2005. Summary of changes for version 20051117:
2830 1) ACPI CA Core Subsystem:
2832 Fixed a problem in the AML parser where the method thread count could be
2833 decremented below zero if any errors occurred during the method parse phase.
2834 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some machines.
2835 This also fixed a related regression with the mechanism that detects and
2836 corrects methods that cannot properly handle reentrancy (related to the
2837 deployment of the new OwnerId mechanism.)
2839 Eliminated the pre-parsing of control methods (to detect errors) during
2840 table load. Related to the problem above, this was causing unwind issues if
2841 any errors occurred during the parse, and it seemed to be overkill. A table
2842 load should not be aborted if there are problems with any single control
2843 method, thus rendering this feature rather pointless.
2845 Fixed a problem with the new table-driven resource manager where an internal
2846 buffer overflow could occur for small resource templates.
2848 Implemented a new external interface, AcpiGetVendorResource. This interface
2849 will find and return a vendor-defined resource descriptor within a _CRS or
2850 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn Helgaas.
2852 Removed the length limit (200) on string objects as per the upcoming ACPI
2853 3.0A specification. This affects the following areas of the interpreter: 1)
2854 any implicit conversion of a Buffer to a String, 2) a String object result
2855 of the ASL Concatentate operator, 3) the String object result of the ASL
2858 Fixed a problem in the Windows OS interface layer (OSL) where a WAIT_FOREVER
2859 on a semaphore object would incorrectly timeout. This allows the
2860 multithreading features of the AcpiExec utility to work properly under
2863 Updated the Linux makefiles for the iASL compiler and AcpiExec to include
2864 the recently added file named "utresrc.c".
2866 Code and Data Size: The current and previous library sizes for the core
2867 subsystem are shown below. These are the code and data sizes for the
2868 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2869 values do not include any ACPI driver or OSPM code. The debug version of the
2870 code includes the debug output trace mechanism and has a much larger code
2871 and data size. Note that these values will vary depending on the efficiency
2872 of the compiler and the compiler options used during generation.
2875 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
2876 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
2878 Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total
2879 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
2882 2) iASL Compiler/Disassembler:
2884 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
2885 specification. For the iASL compiler, this means that string literals within
2886 the source ASL can be of any length.
2888 Enhanced the listing output to dump the AML code for resource descriptors
2889 immediately after the ASL code for each descriptor, instead of in a block at
2890 the end of the entire resource template.
2892 Enhanced the compiler debug output to dump the entire original parse tree
2893 constructed during the parse phase, before any transforms are applied to the
2894 tree. The transformed tree is dumped also.
2896 ----------------------------------------
2897 02 November 2005. Summary of changes for version 20051102:
2899 1) ACPI CA Core Subsystem:
2901 Modified the subsystem initialization sequence to improve GPE support. The
2902 GPE initialization has been split into two parts in order to defer execution
2903 of the _PRW methods (Power Resources for Wake) until after the hardware is
2904 fully initialized and the SCI handler is installed. This allows the _PRW
2905 methods to access fields protected by the Global Lock. This will fix systems
2906 where a NO_GLOBAL_LOCK exception has been seen during initialization.
2908 Converted the ACPI internal object disassemble and display code within the
2909 AML debugger to fully table-driven operation, reducing code size and
2910 increasing maintainability.
2912 Fixed a regression with the ConcatenateResTemplate() ASL operator introduced
2913 in the 20051021 release.
2915 Implemented support for "local" internal ACPI object types within the
2916 debugger "Object" command and the AcpiWalkNamespace external interfaces.
2917 These local types include RegionFields, BankFields, IndexFields, Alias, and
2920 Moved common AML resource handling code into a new file, "utresrc.c". This
2921 code is shared by both the Resource Manager and the AML Debugger.
2923 Code and Data Size: The current and previous library sizes for the core
2924 subsystem are shown below. These are the code and data sizes for the
2925 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2926 values do not include any ACPI driver or OSPM code. The debug version of the
2927 code includes the debug output trace mechanism and has a much larger code
2928 and data size. Note that these values will vary depending on the efficiency
2929 of the compiler and the compiler options used during generation.
2932 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
2933 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
2935 Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total
2936 Debug Version: 163.0K Code, 67.4K Data, 230.4K Total
2939 2) iASL Compiler/Disassembler:
2941 Fixed a problem with very large initializer lists (more than 4000 elements)
2942 for both Buffer and Package objects where the parse stack could overflow.
2944 Enhanced the pre-compile source code scan for non-ASCII characters to ignore
2945 characters within comment fields. The scan is now always performed and is no
2946 longer optional, detecting invalid characters within a source file
2947 immediately rather than during the parse phase or later.
2949 Enhanced the ASL grammar definition to force early reductions on all list-
2950 style grammar elements so that the overall parse stack usage is greatly
2951 reduced. This should improve performance and reduce the possibility of parse
2954 Eliminated all reduce/reduce conflicts in the iASL parser generation. Also,
2955 with the addition of a %expected statement, the compiler generates from
2956 source with no warnings.
2958 Fixed a possible segment fault in the disassembler if the input filename
2959 does not contain a "dot" extension (Thomas Renninger).
2961 ----------------------------------------
2962 21 October 2005. Summary of changes for version 20051021:
2964 1) ACPI CA Core Subsystem:
2966 Implemented support for the EM64T and other x86-64 processors. This
2967 essentially entails recognizing that these processors support non-aligned
2968 memory transfers. Previously, all 64-bit processors were assumed to lack
2969 hardware support for non-aligned transfers.
2971 Completed conversion of the Resource Manager to nearly full table-driven
2972 operation. Specifically, the resource conversion code (convert AML to
2973 internal format and the reverse) and the debug code to dump internal
2974 resource descriptors are fully table-driven, reducing code and data size and
2975 improving maintainability.
2977 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag word
2978 on 64-bit processors instead of a fixed 32-bit word. (With assistance from
2979 Alexey Starikovskiy)
2981 Implemented support within the resource conversion code for the Type-
2982 Specific byte within the various ACPI 3.0 *WordSpace macros.
2984 Fixed some issues within the resource conversion code for the type-specific
2985 flags for both Memory and I/O address resource descriptors. For Memory,
2986 implemented support for the MTP and TTP flags. For I/O, split the TRS and
2987 TTP flags into two separate fields.
2989 Code and Data Size: The current and previous library sizes for the core
2990 subsystem are shown below. These are the code and data sizes for the
2991 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
2992 values do not include any ACPI driver or OSPM code. The debug version of the
2993 code includes the debug output trace mechanism and has a much larger code
2994 and data size. Note that these values will vary depending on the efficiency
2995 of the compiler and the compiler options used during generation.
2998 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
2999 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3001 Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total
3002 Debug Version: 163.5K Code, 67.0K Data, 230.5K Total
3006 2) iASL Compiler/Disassembler:
3008 Relaxed a compiler restriction that disallowed a ResourceIndex byte if the
3009 corresponding ResourceSource string was not also present in a resource
3010 descriptor declaration. This restriction caused problems with existing
3011 AML/ASL code that includes the Index byte without the string. When such AML
3012 was disassembled, it could not be compiled without modification. Further,
3013 the modified code created a resource template with a different size than the
3014 original, breaking code that used fixed offsets into the resource template
3017 Removed a recent feature of the disassembler to ignore a lone ResourceIndex
3018 byte. This byte is now emitted if present so that the exact AML can be
3019 reproduced when the disassembled code is recompiled.
3021 Improved comments and text alignment for the resource descriptor code
3022 emitted by the disassembler.
3024 Implemented disassembler support for the ACPI 3.0 AccessSize field within a
3025 Register() resource descriptor.
3027 ----------------------------------------
3028 30 September 2005. Summary of changes for version 20050930:
3030 1) ACPI CA Core Subsystem:
3032 Completed a major overhaul of the Resource Manager code - specifically,
3033 optimizations in the area of the AML/internal resource conversion code. The
3034 code has been optimized to simplify and eliminate duplicated code, CPU stack
3035 use has been decreased by optimizing function parameters and local
3036 variables, and naming conventions across the manager have been standardized
3037 for clarity and ease of maintenance (this includes function, parameter,
3038 variable, and struct/typedef names.) The update may force changes in some
3039 driver code, depending on how resources are handled by the host OS.
3041 All Resource Manager dispatch and information tables have been moved to a
3042 single location for clarity and ease of maintenance. One new file was
3043 created, named "rsinfo.c".
3045 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
3046 guarantee that the argument is not evaluated twice, making them less prone
3047 to macro side-effects. However, since there exists the possibility of
3048 additional stack use if a particular compiler cannot optimize them (such as
3049 in the debug generation case), the original macros are optionally available.
3050 Note that some invocations of the return_VALUE macro may now cause size
3051 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided to
3052 eliminate these. (From Randy Dunlap)
3054 Implemented a new mechanism to enable debug tracing for individual control
3055 methods. A new external interface, AcpiDebugTrace, is provided to enable
3056 this mechanism. The intent is to allow the host OS to easily enable and
3057 disable tracing for problematic control methods. This interface can be
3058 easily exposed to a user or debugger interface if desired. See the file
3059 psxface.c for details.
3061 AcpiUtCallocate will now return a valid pointer if a length of zero is
3062 specified - a length of one is used and a warning is issued. This matches
3063 the behavior of AcpiUtAllocate.
3065 Code and Data Size: The current and previous library sizes for the core
3066 subsystem are shown below. These are the code and data sizes for the
3067 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3068 values do not include any ACPI driver or OSPM code. The debug version of the
3069 code includes the debug output trace mechanism and has a much larger code
3070 and data size. Note that these values will vary depending on the efficiency
3071 of the compiler and the compiler options used during generation.
3074 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3075 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3077 Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total
3078 Debug Version: 168.0K Code, 68.3K Data, 236.3K Total
3081 2) iASL Compiler/Disassembler:
3083 A remark is issued if the effective compile-time length of a package or
3084 buffer is zero. Previously, this was a warning.
3086 ----------------------------------------
3087 16 September 2005. Summary of changes for version 20050916:
3089 1) ACPI CA Core Subsystem:
3091 Fixed a problem within the Resource Manager where support for the Generic
3092 Register descriptor was not fully implemented. This descriptor is now fully
3093 recognized, parsed, disassembled, and displayed.
3095 Completely restructured the Resource Manager code to utilize table-driven
3096 dispatch and lookup, eliminating many of the large switch() statements. This
3097 reduces overall subsystem code size and code complexity. Affects the
3098 resource parsing and construction, disassembly, and debug dump output.
3100 Cleaned up and restructured the debug dump output for all resource
3101 descriptors. Improved readability of the output and reduced code size.
3103 Fixed a problem where changes to internal data structures caused the
3104 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
3106 Code and Data Size: The current and previous library sizes for the core
3107 subsystem are shown below. These are the code and data sizes for the
3108 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. These
3109 values do not include any ACPI driver or OSPM code. The debug version of the
3110 code includes the debug output trace mechanism and has a much larger code
3111 and data size. Note that these values will vary depending on the efficiency
3112 of the compiler and the compiler options used during generation.
3115 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3116 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3118 Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total
3119 Debug Version: 168.1K Code, 68.4K Data, 236.5K Total
3122 2) iASL Compiler/Disassembler:
3124 Updated the disassembler to automatically insert an EndDependentFn() macro
3125 into the ASL stream if this macro is missing in the original AML code,
3126 simplifying compilation of the resulting ASL module.
3128 Fixed a problem in the disassembler where a disassembled ResourceSource
3129 string (within a large resource descriptor) was not surrounded by quotes and
3130 not followed by a comma, causing errors when the resulting ASL module was
3131 compiled. Also, escape sequences within a ResourceSource string are now
3132 handled correctly (especially "\\")
3134 ----------------------------------------
3135 02 September 2005. Summary of changes for version 20050902:
3137 1) ACPI CA Core Subsystem:
3139 Fixed a problem with the internal Owner ID allocation and deallocation
3140 mechanisms for control method execution and recursive method invocation.
3141 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
3142 messages seen on some systems. Recursive method invocation depth is
3143 currently limited to 255. (Alexey Starikovskiy)
3145 Completely eliminated all vestiges of support for the "module-level
3146 executable code" until this support is fully implemented and debugged. This
3147 should eliminate the NO_RETURN_VALUE exceptions seen during table load on
3148 some systems that invoke this support.
3150 Fixed a problem within the resource manager code where the transaction flags
3151 for a 64-bit address descriptor were handled incorrectly in the type-
3154 Consolidated duplicate code within the address descriptor resource manager
3155 code, reducing overall subsystem code size.
3157 Fixed a fault when using the AML debugger "disassemble" command to
3158 disassemble individual control methods.
3160 Removed references to the "release_current" directory within the Unix
3163 Code and Data Size: The current and previous core subsystem library sizes
3164 are shown below. These are the code and data sizes for the acpica.lib
3165 produced by the Microsoft Visual C++ 6.0 compiler. These values do not
3166 include any ACPI driver or OSPM code. The debug version of the code includes
3167 the debug output trace mechanism and has a much larger code and data size.
3168 Note that these values will vary depending on the efficiency of the compiler
3169 and the compiler options used during generation.
3172 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3173 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3175 Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total
3176 Debug Version: 169.6K Code, 69.9K Data, 239.5K Total
3179 2) iASL Compiler/Disassembler:
3181 Implemented an error check for illegal duplicate values in the interrupt and
3182 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
3185 Implemented error checking for the Irq() and IrqNoFlags() macros to detect
3186 too many values in the interrupt list (16 max) and invalid values in the
3189 The maximum length string literal within an ASL file is now restricted to
3190 200 characters as per the ACPI specification.
3192 Fixed a fault when using the -ln option (generate namespace listing).
3194 Implemented an error check to determine if a DescriptorName within a
3195 resource descriptor has already been used within the current scope.
3197 ----------------------------------------
3198 15 August 2005. Summary of changes for version 20050815:
3200 1) ACPI CA Core Subsystem:
3202 Implemented a full bytewise compare to determine if a table load request is
3203 attempting to load a duplicate table. The compare is performed if the table
3204 signatures and table lengths match. This will allow different tables with
3205 the same OEM Table ID and revision to be loaded - probably against the ACPI
3206 specification, but discovered in the field nonetheless.
3208 Added the changes.txt logfile to each of the zipped release packages.
3210 Code and Data Size: Current and previous core subsystem library sizes are
3211 shown below. These are the code and data sizes for the acpica.lib produced
3212 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3213 any ACPI driver or OSPM code. The debug version of the code includes the
3214 debug output trace mechanism and has a much larger code and data size. Note
3215 that these values will vary depending on the efficiency of the compiler and
3216 the compiler options used during generation.
3219 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3220 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3222 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3223 Debug Version: 170.0K Code, 69.9K Data, 239.9K Total
3226 2) iASL Compiler/Disassembler:
3228 Fixed a problem where incorrect AML code could be generated for Package
3229 objects if optimization is disabled (via the -oa switch).
3231 Fixed a problem with where incorrect AML code is generated for variable-
3232 length packages when the package length is not specified and the number of
3233 initializer values is greater than 255.
3236 ----------------------------------------
3237 29 July 2005. Summary of changes for version 20050729:
3239 1) ACPI CA Core Subsystem:
3241 Implemented support to ignore an attempt to install/load a particular ACPI
3242 table more than once. Apparently there exists BIOS code that repeatedly
3243 attempts to load the same SSDT upon certain events. With assistance from
3244 Venkatesh Pallipadi.
3246 Restructured the main interface to the AML parser in order to correctly
3247 handle all exceptional conditions. This will prevent leakage of the OwnerId
3248 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on some
3249 machines. With assistance from Alexey Starikovskiy.
3251 Support for "module level code" has been disabled in this version due to a
3252 number of issues that have appeared on various machines. The support can be
3253 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
3254 compilation. When the issues are fully resolved, the code will be enabled by
3257 Modified the internal functions for debug print support to define the
3258 FunctionName parameter as a (const char *) for compatibility with compiler
3259 built-in macros such as __FUNCTION__, etc.
3261 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
3263 Implemented support to display an object count summary for the AML Debugger
3264 commands Object and Methods.
3266 Code and Data Size: Current and previous core subsystem library sizes are
3267 shown below. These are the code and data sizes for the acpica.lib produced
3268 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3269 any ACPI driver or OSPM code. The debug version of the code includes the
3270 debug output trace mechanism and has a much larger code and data size. Note
3271 that these values will vary depending on the efficiency of the compiler and
3272 the compiler options used during generation.
3275 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3276 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3278 Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total
3279 Debug Version: 167.0K Code, 69.9K Data, 236.9K Total
3282 2) iASL Compiler/Disassembler:
3284 Fixed a regression that appeared in the 20050708 version of the compiler
3285 where an error message was inadvertently emitted for invocations of the _OSI
3286 reserved control method.
3288 ----------------------------------------
3289 08 July 2005. Summary of changes for version 20050708:
3291 1) ACPI CA Core Subsystem:
3293 The use of the CPU stack in the debug version of the subsystem has been
3294 considerably reduced. Previously, a debug structure was declared in every
3295 function that used the debug macros. This structure has been removed in
3296 favor of declaring the individual elements as parameters to the debug
3297 functions. This reduces the cumulative stack use during nested execution of
3298 ACPI function calls at the cost of a small increase in the code size of the
3299 debug version of the subsystem. With assistance from Alexey Starikovskiy and
3302 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
3303 headers to define a macro that will return the current function name at
3304 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by
3305 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
3306 compiler-dependent header, the function name is saved on the CPU stack (one
3307 pointer per function.) This mechanism is used because apparently there
3308 exists no standard ANSI-C defined macro that that returns the function name.
3310 Redesigned and reimplemented the "Owner ID" mechanism used to track
3311 namespace objects created/deleted by ACPI tables and control method
3312 execution. A bitmap is now used to allocate and free the IDs, thus solving
3313 the wraparound problem present in the previous implementation. The size of
3314 the namespace node descriptor was reduced by 2 bytes as a result (Alexey
3317 Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield
3318 flag definitions within the headers for the predefined ACPI tables. These
3319 have been replaced by UINT8_BIT in order to increase the code portability of
3320 the subsystem. If the use of UINT8 remains a problem, we may be forced to
3321 eliminate bitfields entirely because of a lack of portability.
3323 Enhanced the performance of the AcpiUtUpdateObjectReference procedure. This
3324 is a frequently used function and this improvement increases the performance
3325 of the entire subsystem (Alexey Starikovskiy).
3327 Fixed several possible memory leaks and the inverse - premature object
3328 deletion (Alexey Starikovskiy).
3330 Code and Data Size: Current and previous core subsystem library sizes are
3331 shown below. These are the code and data sizes for the acpica.lib produced
3332 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3333 any ACPI driver or OSPM code. The debug version of the code includes the
3334 debug output trace mechanism and has a much larger code and data size. Note
3335 that these values will vary depending on the efficiency of the compiler and
3336 the compiler options used during generation.
3339 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3340 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3342 Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total
3343 Debug Version: 170.0K Code, 69.7K Data, 239.7K Total
3345 ----------------------------------------
3346 24 June 2005. Summary of changes for version 20050624:
3348 1) ACPI CA Core Subsystem:
3350 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
3351 the host-defined cache object. This allows the OSL implementation to define
3352 and type this object in any manner desired, simplifying the OSL
3353 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
3354 Linux, and should be defined in the OS-specific header file for other
3355 operating systems as required.
3357 Changed the interface to AcpiOsAcquireObject to directly return the
3358 requested object as the function return (instead of ACPI_STATUS.) This
3359 change was made for performance reasons, since this is the purpose of the
3360 interface in the first place. AcpiOsAcquireObject is now similar to the
3361 AcpiOsAllocate interface.
3363 Implemented a new AML debugger command named Businfo. This command displays
3364 information about all devices that have an associate _PRT object. The _ADR,
3365 _HID, _UID, and _CID are displayed for these devices.
3367 Modified the initialization sequence in AcpiInitializeSubsystem to call the
3368 OSL interface AcpiOslInitialize first, before any local initialization. This
3369 change was required because the global initialization now calls OSL
3372 Enhanced the Dump command to display the entire contents of Package objects
3373 (including all sub-objects and their values.)
3375 Restructured the code base to split some files because of size and/or
3376 because the code logically belonged in a separate file. New files are listed
3377 below. All makefiles and project files included in the ACPI CA release have
3379 utilities/utcache.c /* Local cache interfaces */
3380 utilities/utmutex.c /* Local mutex support */
3381 utilities/utstate.c /* State object support */
3382 interpreter/parser/psloop.c /* Main AML parse loop */
3384 Code and Data Size: Current and previous core subsystem library sizes are
3385 shown below. These are the code and data sizes for the acpica.lib produced
3386 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3387 any ACPI driver or OSPM code. The debug version of the code includes the
3388 debug output trace mechanism and has a much larger code and data size. Note
3389 that these values will vary depending on the efficiency of the compiler and
3390 the compiler options used during generation.
3393 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
3394 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
3396 Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total
3397 Debug Version: 165.2K Code, 69.6K Data, 234.8K Total
3400 2) iASL Compiler/Disassembler:
3402 Fixed a regression introduced in version 20050513 where the use of a Package
3403 object within a Case() statement caused a compile time exception. The
3404 original behavior has been restored (a Match() operator is emitted.)
3406 ----------------------------------------
3407 17 June 2005. Summary of changes for version 20050617:
3409 1) ACPI CA Core Subsystem:
3411 Moved the object cache operations into the OS interface layer (OSL) to allow
3412 the host OS to handle these operations if desired (for example, the Linux
3413 OSL will invoke the slab allocator). This support is optional; the compile
3414 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache
3415 code in the ACPI CA core. The new OSL interfaces are shown below. See
3416 utalloc.c for an example implementation, and acpiosxf.h for the exact
3417 interface definitions. With assistance from Alexey Starikovskiy.
3424 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to return
3425 and restore a flags parameter. This fits better with many OS lock models.
3426 Note: the current execution state (interrupt handler or not) is no longer
3427 passed to these interfaces. If necessary, the OSL must determine this state
3428 by itself, a simple and fast operation. With assistance from Alexey
3431 Fixed a problem in the ACPI table handling where a valid XSDT was assumed
3432 present if the revision of the RSDP was 2 or greater. According to the ACPI
3433 specification, the XSDT is optional in all cases, and the table manager
3434 therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
3435 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain
3438 Fixed an interpreter problem with the Mid() operator in the case of an input
3439 string where the resulting output string is of zero length. It now correctly
3440 returns a valid, null terminated string object instead of a string object
3441 with a null pointer.
3443 Fixed a problem with the control method argument handling to allow a store
3444 to an Arg object that already contains an object of type Device. The Device
3445 object is now correctly overwritten. Previously, an error was returned.
3448 Enhanced the debugger Find command to emit object values in addition to the
3449 found object pathnames. The output format is the same as the dump namespace
3452 Enhanced the debugger Set command. It now has the ability to set the value
3453 of any Named integer object in the namespace (Previously, only method locals
3454 and args could be set.)
3456 Code and Data Size: Current and previous core subsystem library sizes are
3457 shown below. These are the code and data sizes for the acpica.lib produced
3458 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3459 any ACPI driver or OSPM code. The debug version of the code includes the
3460 debug output trace mechanism and has a much larger code and data size. Note
3461 that these values will vary depending on the efficiency of the compiler and
3462 the compiler options used during generation.
3465 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
3466 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
3468 Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total
3469 Debug Version: 164.0K Code, 69.1K Data, 233.1K Total
3472 2) iASL Compiler/Disassembler:
3474 Fixed a regression in the disassembler where if/else/while constructs were
3475 output incorrectly. This problem was introduced in the previous release
3476 (20050526). This problem also affected the single-step disassembly in the
3479 Fixed a problem where compiling the reserved _OSI method would randomly (but
3480 rarely) produce compile errors.
3482 Enhanced the disassembler to emit compilable code in the face of incorrect
3483 AML resource descriptors. If the optional ResourceSourceIndex is present,
3484 but the ResourceSource is not, do not emit the ResourceSourceIndex in the
3485 disassembly. Otherwise, the resulting code cannot be compiled without
3488 ----------------------------------------
3489 26 May 2005. Summary of changes for version 20050526:
3491 1) ACPI CA Core Subsystem:
3493 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
3494 the module level (not within a control method.) These opcodes are executed
3495 exactly once at the time the table is loaded. This type of code was legal up
3496 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA in
3497 order to provide backwards compatibility with earlier BIOS implementations.
3498 This eliminates the "Encountered executable code at module level" warning
3499 that was previously generated upon detection of such code.
3501 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
3502 inadvertently be generated during the lookup of namespace objects in the
3503 second pass parse of ACPI tables and control methods. It appears that this
3504 problem could occur during the resolution of forward references to namespace
3507 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
3508 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
3509 allows the deadlock detection debug code to be compiled out in the normal
3510 case, improving mutex performance (and overall subsystem performance)
3513 Implemented a handful of miscellaneous fixes for possible memory leaks on
3514 error conditions and error handling control paths. These fixes were
3515 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
3517 Added a check for a null RSDT pointer in AcpiGetFirmwareTable (tbxfroot.c)
3518 to prevent a fault in this error case.
3520 Code and Data Size: Current and previous core subsystem library sizes are
3521 shown below. These are the code and data sizes for the acpica.lib produced
3522 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3523 any ACPI driver or OSPM code. The debug version of the code includes the
3524 debug output trace mechanism and has a much larger code and data size. Note
3525 that these values will vary depending on the efficiency of the compiler and
3526 the compiler options used during generation.
3529 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3530 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3532 Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total
3533 Debug Version: 164.0K Code, 69.3K Data, 233.3K Total
3536 2) iASL Compiler/Disassembler:
3538 Implemented support to allow Type 1 and Type 2 ASL operators to appear at
3539 the module level (not within a control method.) These operators will be
3540 executed once at the time the table is loaded. This type of code was legal
3541 up until the release of ACPI 2.0B (2002) and is now supported by the iASL
3542 compiler in order to provide backwards compatibility with earlier BIOS ASL
3545 The ACPI integer width (specified via the table revision ID or the -r
3546 override, 32 or 64 bits) is now used internally during compile-time constant
3547 folding to ensure that constants are truncated to 32 bits if necessary.
3548 Previously, the revision ID value was only emitted in the AML table header.
3550 An error message is now generated for the Mutex and Method operators if the
3551 SyncLevel parameter is outside the legal range of 0 through 15.
3553 Fixed a problem with the Method operator ParameterTypes list handling (ACPI
3554 3.0). Previously, more than 2 types or 2 arguments generated a syntax error.
3555 The actual underlying implementation of method argument typechecking is
3556 still under development, however.
3558 ----------------------------------------
3559 13 May 2005. Summary of changes for version 20050513:
3561 1) ACPI CA Core Subsystem:
3563 Implemented support for PCI Express root bridges -- added support for device
3564 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
3566 The interpreter now automatically truncates incoming 64-bit constants to 32
3567 bits if currently executing out of a 32-bit ACPI table (Revision < 2). This
3568 also affects the iASL compiler constant folding. (Note: as per below, the
3569 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
3571 Fixed a problem where string and buffer objects with "static" pointers
3572 (pointers to initialization data within an ACPI table) were not handled
3573 consistently. The internal object copy operation now always copies the data
3574 to a newly allocated buffer, regardless of whether the source object is
3577 Fixed a problem with the FromBCD operator where an implicit result
3578 conversion was improperly performed while storing the result to the target
3579 operand. Since this is an "explicit conversion" operator, the implicit
3580 conversion should never be performed on the output.
3582 Fixed a problem with the CopyObject operator where a copy to an existing
3583 named object did not always completely overwrite the existing object stored
3584 at name. Specifically, a buffer-to-buffer copy did not delete the existing
3587 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces and
3588 structs for consistency.
3590 Code and Data Size: Current and previous core subsystem library sizes are
3591 shown below. These are the code and data sizes for the acpica.lib produced
3592 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3593 any ACPI driver or OSPM code. The debug version of the code includes the
3594 debug output trace mechanism and has a much larger code and data size. Note
3595 that these values will vary depending on the efficiency of the compiler and
3596 the compiler options used during generation.
3599 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3600 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3601 Current Release: (Same sizes)
3602 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3603 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3606 2) iASL Compiler/Disassembler:
3608 The compiler now emits a warning if an attempt is made to generate a 64-bit
3609 integer constant from within a 32-bit ACPI table (Revision < 2). The integer
3610 is truncated to 32 bits.
3612 Fixed a problem with large package objects: if the static length of the
3613 package is greater than 255, the "variable length package" opcode is
3614 emitted. Previously, this caused an error. This requires an update to the
3615 ACPI spec, since it currently (incorrectly) states that packages larger than
3616 255 elements are not allowed.
3618 The disassembler now correctly handles variable length packages and packages
3619 larger than 255 elements.
3621 ----------------------------------------
3622 08 April 2005. Summary of changes for version 20050408:
3624 1) ACPI CA Core Subsystem:
3626 Fixed three cases in the interpreter where an "index" argument to an ASL
3627 function was still (internally) 32 bits instead of the required 64 bits.
3628 This was the Index argument to the Index, Mid, and Match operators.
3630 The "strupr" function is now permanently local (AcpiUtStrupr), since this is
3631 not a POSIX-defined function and not present in most kernel-level C
3632 libraries. All references to the C library strupr function have been removed
3635 Completed the deployment of static functions/prototypes. All prototypes with
3636 the static attribute have been moved from the headers to the owning C file.
3638 Implemented an extract option (-e) for the AcpiBin utility (AML binary
3639 utility). This option allows the utility to extract individual ACPI tables
3640 from the output of AcpiDmp. It provides the same functionality of the
3641 acpixtract.pl perl script without the worry of setting the correct perl
3642 options. AcpiBin runs on Windows and has not yet been generated/validated in
3643 the Linux/Unix environment (but should be soon).
3645 Updated and fixed the table dump option for AcpiBin (-d). This option
3646 converts a single ACPI table to a hex/ascii file, similar to the output of
3649 Code and Data Size: Current and previous core subsystem library sizes are
3650 shown below. These are the code and data sizes for the acpica.lib produced
3651 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3652 any ACPI driver or OSPM code. The debug version of the code includes the
3653 debug output trace mechanism and has a much larger code and data size. Note
3654 that these values will vary depending on the efficiency of the compiler and
3655 the compiler options used during generation.
3658 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
3659 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
3661 Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total
3662 Debug Version: 163.7K Code, 69.3K Data, 233.0K Total
3665 2) iASL Compiler/Disassembler:
3667 Disassembler fix: Added a check to ensure that the table length found in the
3668 ACPI table header within the input file is not longer than the actual input
3669 file size. This indicates some kind of file or table corruption.
3671 ----------------------------------------
3672 29 March 2005. Summary of changes for version 20050329:
3674 1) ACPI CA Core Subsystem:
3676 An error is now generated if an attempt is made to create a Buffer Field of
3677 length zero (A CreateField with a length operand of zero.)
3679 The interpreter now issues a warning whenever executable code at the module
3680 level is detected during ACPI table load. This will give some idea of the
3681 prevalence of this type of code.
3683 Implemented support for references to named objects (other than control
3684 methods) within package objects.
3686 Enhanced package object output for the debug object. Package objects are now
3687 completely dumped, showing all elements.
3689 Enhanced miscellaneous object output for the debug object. Any object can
3690 now be written to the debug object (for example, a device object can be
3691 written, and the type of the object will be displayed.)
3693 The "static" qualifier has been added to all local functions across both the
3694 core subsystem and the iASL compiler.
3696 The number of "long" lines (> 80 chars) within the source has been
3697 significantly reduced, by about 1/3.
3699 Cleaned up all header files to ensure that all CA/iASL functions are
3700 prototyped (even static functions) and the formatting is consistent.
3702 Two new header files have been added, acopcode.h and acnames.h.
3704 Removed several obsolete functions that were no longer used.
3706 Code and Data Size: Current and previous core subsystem library sizes are
3707 shown below. These are the code and data sizes for the acpica.lib produced
3708 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3709 any ACPI driver or OSPM code. The debug version of the code includes the
3710 debug output trace mechanism and has a much larger code and data size. Note
3711 that these values will vary depending on the efficiency of the compiler and
3712 the compiler options used during generation.
3715 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
3716 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
3718 Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total
3719 Debug Version: 163.5K Code, 69.3K Data, 232.8K Total
3723 2) iASL Compiler/Disassembler:
3725 Fixed a problem with the resource descriptor generation/support. For the
3726 ResourceSourceIndex and the ResourceSource fields, both must be present, or
3727 both must be not present - can't have one without the other.
3729 The compiler now returns non-zero from the main procedure if any errors have
3730 occurred during the compilation.
3733 ----------------------------------------
3734 09 March 2005. Summary of changes for version 20050309:
3736 1) ACPI CA Core Subsystem:
3738 The string-to-buffer implicit conversion code has been modified again after
3739 a change to the ACPI specification. In order to match the behavior of the
3740 other major ACPI implementation, the target buffer is no longer truncated if
3741 the source string is smaller than an existing target buffer. This change
3742 requires an update to the ACPI spec, and should eliminate the recent
3743 AE_AML_BUFFER_LIMIT issues.
3745 The "implicit return" support was rewritten to a new algorithm that solves
3746 the general case. Rather than attempt to determine when a method is about to
3747 exit, the result of every ASL operator is saved momentarily until the very
3748 next ASL operator is executed. Therefore, no matter how the method exits,
3749 there will always be a saved implicit return value. This feature is only
3750 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should eliminate
3751 AE_AML_NO_RETURN_VALUE errors when enabled.
3753 Implemented implicit conversion support for the predicate (operand) of the
3754 If, Else, and While operators. String and Buffer arguments are automatically
3755 converted to Integers.
3757 Changed the string-to-integer conversion behavior to match the new ACPI
3758 errata: "If no integer object exists, a new integer is created. The ASCII
3759 string is interpreted as a hexadecimal constant. Each string character is
3760 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
3761 with the first character as the most significant digit, and ending with the
3762 first non-hexadecimal character or end-of-string." This means that the first
3763 non-hex character terminates the conversion and this is the code that was
3766 Fixed a problem where the ObjectType operator would fail (fault) when used
3767 on an Index of a Package which pointed to a null package element. The
3768 operator now properly returns zero (Uninitialized) in this case.
3770 Fixed a problem where the While operator used excessive memory by not
3771 properly popping the result stack during execution. There was no memory leak
3772 after execution, however. (Code provided by Valery Podrezov.)
3774 Fixed a problem where references to control methods within Package objects
3775 caused the method to be invoked, instead of producing a reference object
3776 pointing to the method.
3778 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree) to
3779 improve performance and reduce code size. (Code provided by Alexey
3782 Code and Data Size: Current and previous core subsystem library sizes are
3783 shown below. These are the code and data sizes for the acpica.lib produced
3784 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3785 any ACPI driver or OSPM code. The debug version of the code includes the
3786 debug output trace mechanism and has a much larger code and data size. Note
3787 that these values will vary depending on the efficiency of the compiler and
3788 the compiler options used during generation.
3791 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
3792 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
3794 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
3795 Debug Version: 165.4K Code, 69.7K Data, 236.1K Total
3798 2) iASL Compiler/Disassembler:
3800 Fixed a problem with the Return operator with no arguments. Since the AML
3801 grammar for the byte encoding requires an operand for the Return opcode, the
3802 compiler now emits a Return(Zero) for this case. An ACPI specification
3803 update has been written for this case.
3805 For tables other than the DSDT, namepath optimization is automatically
3806 disabled. This is because SSDTs can be loaded anywhere in the namespace, the
3807 compiler has no knowledge of where, and thus cannot optimize namepaths.
3809 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
3810 inadvertently omitted from the ACPI specification, and will require an
3813 The source file scan for ASCII characters is now optional (-a). This change
3814 was made because some vendors place non-ascii characters within comments.
3815 However, the scan is simply a brute-force byte compare to ensure all
3816 characters in the file are in the range 0x00 to 0x7F.
3818 Fixed a problem with the CondRefOf operator where the compiler was
3819 inappropriately checking for the existence of the target. Since the point of
3820 the operator is to check for the existence of the target at run-time, the
3821 compiler no longer checks for the target existence.
3823 Fixed a problem where errors generated from the internal AML interpreter
3824 during constant folding were not handled properly, causing a fault.
3826 Fixed a problem with overly aggressive range checking for the Stall
3827 operator. The valid range (max 255) is now only checked if the operand is of
3828 type Integer. All other operand types cannot be statically checked.
3830 Fixed a problem where control method references within the RefOf, DeRefOf,
3831 and ObjectType operators were not treated properly. They are now treated as
3832 actual references, not method invocations.
3834 Fixed and enhanced the "list namespace" option (-ln). This option was broken
3835 a number of releases ago.
3837 Improved error handling for the Field, IndexField, and BankField operators.
3838 The compiler now cleanly reports and recovers from errors in the field
3839 component (FieldUnit) list.
3841 Fixed a disassembler problem where the optional ResourceDescriptor fields
3842 TRS and TTP were not always handled correctly.
3844 Disassembler - Comments in output now use "//" instead of "/*"
3846 ----------------------------------------
3847 28 February 2005. Summary of changes for version 20050228:
3849 1) ACPI CA Core Subsystem:
3851 Fixed a problem where the result of an Index() operator (an object
3852 reference) must increment the reference count on the target object for the
3853 life of the object reference.
3855 Implemented AML Interpreter and Debugger support for the new ACPI 3.0
3856 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and WordSpace
3857 resource descriptors.
3859 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
3860 Space Descriptor" string, indicating interpreter support for the descriptors
3863 Implemented header support for the new ACPI 3.0 FADT flag bits.
3865 Implemented header support for the new ACPI 3.0 PCI Express bits for the PM1
3866 status/enable registers.
3868 Updated header support for the MADT processor local Apic struct and MADT
3869 platform interrupt source struct for new ACPI 3.0 fields.
3871 Implemented header support for the SRAT and SLIT ACPI tables.
3873 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack" flag
3876 Code and Data Size: Current and previous core subsystem library sizes are
3877 shown below. These are the code and data sizes for the acpica.lib produced
3878 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3879 any ACPI driver or OSPM code. The debug version of the code includes the
3880 debug output trace mechanism and has a much larger code and data size. Note
3881 that these values will vary depending on the efficiency of the compiler and
3882 the compiler options used during generation.
3885 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
3886 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
3888 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
3889 Debug Version: 165.4K Code, 69.6K Data, 236.0K Total
3892 2) iASL Compiler/Disassembler:
3894 Fixed a problem with the internal 64-bit String-to-integer conversion with
3895 strings less than two characters long.
3897 Fixed a problem with constant folding where the result of the Index()
3898 operator can not be considered a constant. This means that Index() cannot be
3899 a type3 opcode and this will require an update to the ACPI specification.
3901 Disassembler: Implemented support for the TTP, MTP, and TRS resource
3902 descriptor fields. These fields were inadvertently ignored and not output in
3903 the disassembly of the resource descriptor.
3906 ----------------------------------------
3907 11 February 2005. Summary of changes for version 20050211:
3909 1) ACPI CA Core Subsystem:
3911 Implemented ACPI 3.0 support for implicit conversion within the Match()
3912 operator. MatchObjects can now be of type integer, buffer, or string instead
3913 of just type integer. Package elements are implicitly converted to the type
3914 of the MatchObject. This change aligns the behavior of Match() with the
3915 behavior of the other logical operators (LLess(), etc.) It also requires an
3916 errata change to the ACPI specification as this support was intended for
3917 ACPI 3.0, but was inadvertently omitted.
3919 Fixed a problem with the internal implicit "to buffer" conversion. Strings
3920 that are converted to buffers will cause buffer truncation if the string is
3921 smaller than the target buffer. Integers that are converted to buffers will
3922 not cause buffer truncation, only zero extension (both as per the ACPI
3923 spec.) The problem was introduced when code was added to truncate the
3924 buffer, but this should not be performed in all cases, only the string case.
3926 Fixed a problem with the Buffer and Package operators where the interpreter
3927 would get confused if two such operators were used as operands to an ASL
3928 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
3929 stack was not being popped after the execution of these operators, resulting
3930 in an AE_NO_RETURN_VALUE exception.
3932 Fixed a problem with constructs of the form Store(Index(...),...). The
3933 reference object returned from Index was inadvertently resolved to an actual
3934 value. This problem was introduced in version 20050114 when the behavior of
3935 Store() was modified to restrict the object types that can be used as the
3936 source operand (to match the ACPI specification.)
3938 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
3940 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
3942 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
3944 Code and Data Size: Current and previous core subsystem library sizes are
3945 shown below. These are the code and data sizes for the acpica.lib produced
3946 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
3947 any ACPI driver or OSPM code. The debug version of the code includes the
3948 debug output trace mechanism and has a much larger code and data size. Note
3949 that these values will vary depending on the efficiency of the compiler and
3950 the compiler options used during generation.
3953 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
3954 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
3956 Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total
3957 Debug Version: 164.9K Code, 69.2K Data, 234.1K Total
3960 2) iASL Compiler/Disassembler:
3962 Fixed a code generation problem in the constant folding optimization code
3963 where incorrect code was generated if a constant was reduced to a buffer
3964 object (i.e., a reduced type 5 opcode.)
3966 Fixed a typechecking problem for the ToBuffer operator. Caused by an
3967 incorrect return type in the internal opcode information table.
3969 ----------------------------------------
3970 25 January 2005. Summary of changes for version 20050125:
3972 1) ACPI CA Core Subsystem:
3974 Fixed a recently introduced problem with the Global Lock where the
3975 underlying semaphore was not created. This problem was introduced in
3976 version 20050114, and caused an AE_AML_NO_OPERAND exception during an
3977 Acquire() operation on _GL.
3979 The local object cache is now optional, and is disabled by default. Both
3980 AcpiExec and the iASL compiler enable the cache because they run in user
3981 mode and this enhances their performance. #define ACPI_ENABLE_OBJECT_CACHE
3982 to enable the local cache.
3984 Fixed an issue in the internal function AcpiUtEvaluateObject concerning the
3985 optional "implicit return" support where an error was returned if no return
3986 object was expected, but one was implicitly returned. AE_OK is now returned
3987 in this case and the implicitly returned object is deleted.
3988 AcpiUtEvaluateObject is only occasionally used, and only to execute reserved
3989 methods such as _STA and _INI where the return type is known up front.
3991 Fixed a few issues with the internal convert-to-integer code. It now returns
3992 an error if an attempt is made to convert a null string, a string of only
3993 blanks/tabs, or a zero-length buffer. This affects both implicit conversion
3994 and explicit conversion via the ToInteger() operator.
3996 The internal debug code in AcpiUtAcquireMutex has been commented out. It is
3997 not needed for normal operation and should increase the performance of the
3998 entire subsystem. The code remains in case it is needed for debug purposes
4001 The AcpiExec source and makefile are included in the Unix/Linux package for
4004 Code and Data Size: Current and previous core subsystem library sizes are
4005 shown below. These are the code and data sizes for the acpica.lib produced
4006 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4007 any ACPI driver or OSPM code. The debug version of the code includes the
4008 debug output trace mechanism and has a much larger code and data size. Note
4009 that these values will vary depending on the efficiency of the compiler and
4010 the compiler options used during generation.
4013 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4014 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4016 Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total
4017 Debug Version: 164.8K Code, 69.2K Data, 234.0K Total
4019 2) iASL Compiler/Disassembler:
4021 Switch/Case support: A warning is now issued if the type of the Switch value
4022 cannot be determined at compile time. For example, Switch(Arg0) will
4023 generate the warning, and the type is assumed to be an integer. As per the
4024 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate the
4027 Switch/Case support: Implemented support for buffer and string objects as
4028 the switch value. This is an ACPI 3.0 feature, now that LEqual supports
4029 buffers and strings.
4031 Switch/Case support: The emitted code for the LEqual() comparisons now uses
4032 the switch value as the first operand, not the second. The case value is now
4033 the second operand, and this allows the case value to be implicitly
4034 converted to the type of the switch value, not the other way around.
4036 Switch/Case support: Temporary variables are now emitted immediately within
4037 the control method, not at the global level. This means that there are now
4038 36 temps available per-method, not 36 temps per-module as was the case with
4039 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
4041 ----------------------------------------
4042 14 January 2005. Summary of changes for version 20050114:
4044 Added 2005 copyright to all module headers. This affects every module in
4045 the core subsystem, iASL compiler, and the utilities.
4047 1) ACPI CA Core Subsystem:
4049 Fixed an issue with the String-to-Buffer conversion code where the string
4050 null terminator was not included in the buffer after conversion, but there
4051 is existing ASL that assumes the string null terminator is included. This is
4052 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
4053 introduced in the previous version when the code was updated to correctly
4054 set the converted buffer size as per the ACPI specification. The ACPI spec
4055 is ambiguous and will be updated to specify that the null terminator must be
4056 included in the converted buffer. This also affects the ToBuffer() ASL
4059 Fixed a problem with the Mid() ASL/AML operator where it did not work
4060 correctly on Buffer objects. Newly created sub-buffers were not being marked
4064 Fixed a problem in AcpiTbFindTable where incorrect string compares were
4065 performed on the OemId and OemTableId table header fields. These fields are
4066 not null terminated, so strncmp is now used instead of strcmp.
4068 Implemented a restriction on the Store() ASL/AML operator to align the
4069 behavior with the ACPI specification. Previously, any object could be used
4070 as the source operand. Now, the only objects that may be used are Integers,
4071 Buffers, Strings, Packages, Object References, and DDB Handles. If
4072 necessary, the original behavior can be restored by enabling the
4073 EnableInterpreterSlack flag.
4075 Enhanced the optional "implicit return" support to allow an implicit return
4076 value from methods that are invoked externally via the AcpiEvaluateObject
4077 interface. This enables implicit returns from the _STA and _INI methods,
4080 Changed the Revision() ASL/AML operator to return the current version of the
4081 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly returned
4082 the supported ACPI version (This is the function of the _REV method).
4084 Updated the _REV predefined method to return the currently supported version
4087 Implemented batch mode option for the AcpiExec utility (-b).
4089 Code and Data Size: Current and previous core subsystem library sizes are
4090 shown below. These are the code and data sizes for the acpica.lib produced
4091 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4092 any ACPI driver or OSPM code. The debug version of the code includes the
4093 debug output trace mechanism and has a much larger code and data size. Note
4094 that these values will vary depending on the efficiency of the compiler and
4095 the compiler options used during generation.
4098 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4099 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4101 Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total
4102 Debug Version: 165.4K Code, 69.4K Data, 234.8K Total
4104 ----------------------------------------
4105 10 December 2004. Summary of changes for version 20041210:
4107 ACPI 3.0 support is nearing completion in both the iASL compiler and the
4108 ACPI CA core subsystem.
4110 1) ACPI CA Core Subsystem:
4112 Fixed a problem in the ToDecimalString operator where the resulting string
4113 length was incorrectly calculated. The length is now calculated exactly,
4114 eliminating incorrect AE_STRING_LIMIT exceptions.
4116 Fixed a problem in the ToHexString operator to allow a maximum 200 character
4117 string to be produced.
4119 Fixed a problem in the internal string-to-buffer and buffer-to-buffer copy
4120 routine where the length of the resulting buffer was not truncated to the
4121 new size (if the target buffer already existed).
4123 Code and Data Size: Current and previous core subsystem library sizes are
4124 shown below. These are the code and data sizes for the acpica.lib produced
4125 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4126 any ACPI driver or OSPM code. The debug version of the code includes the
4127 debug output trace mechanism and has a much larger code and data size. Note
4128 that these values will vary depending on the efficiency of the compiler and
4129 the compiler options used during generation.
4132 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4133 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4135 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4136 Debug Version: 165.3K Code, 69.4K Data, 234.7K Total
4139 2) iASL Compiler/Disassembler:
4141 Implemented the new ACPI 3.0 resource template macros - DWordSpace,
4142 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
4143 Includes support in the disassembler.
4145 Implemented support for the new (ACPI 3.0) parameter to the Register macro,
4148 Fixed a problem where the _HE resource name for the Interrupt macro was
4149 referencing bit 0 instead of bit 1.
4151 Implemented check for maximum 255 interrupts in the Interrupt macro.
4153 Fixed a problem with the predefined resource descriptor names where
4154 incorrect AML code was generated if the offset within the resource buffer
4155 was 0 or 1. The optimizer shortened the AML code to a single byte opcode
4156 but did not update the surrounding package lengths.
4158 Changes to the Dma macro: All channels within the channel list must be in
4159 the range 0-7. Maximum 8 channels can be specified. BusMaster operand is
4160 optional (default is BusMaster).
4162 Implemented check for maximum 7 data bytes for the VendorShort macro.
4164 The ReadWrite parameter is now optional for the Memory32 and similar macros.
4166 ----------------------------------------
4167 03 December 2004. Summary of changes for version 20041203:
4169 1) ACPI CA Core Subsystem:
4171 The low-level field insertion/extraction code (exfldio) has been completely
4172 rewritten to eliminate unnecessary complexity, bugs, and boundary
4175 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and ToDecimalString
4176 operators where the input operand could be inadvertently deleted if no
4177 conversion was necessary (e.g., if the input to ToInteger was an Integer
4180 Fixed a problem with the ToDecimalString and ToHexString where an incorrect
4181 exception code was returned if the resulting string would be > 200 chars.
4182 AE_STRING_LIMIT is now returned.
4184 Fixed a problem with the Concatenate operator where AE_OK was always
4185 returned, even if the operation failed.
4187 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
4188 semaphores to be allocated.
4190 Code and Data Size: Current and previous core subsystem library sizes are
4191 shown below. These are the code and data sizes for the acpica.lib produced
4192 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4193 any ACPI driver or OSPM code. The debug version of the code includes the
4194 debug output trace mechanism and has a much larger code and data size. Note
4195 that these values will vary depending on the efficiency of the compiler and
4196 the compiler options used during generation.
4199 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4200 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4202 Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total
4203 Debug Version: 164.7K Code, 68.5K Data, 233.2K Total
4206 2) iASL Compiler/Disassembler:
4208 Fixed typechecking for the ObjectType and SizeOf operators. Problem was
4209 recently introduced in 20041119.
4211 Fixed a problem with the ToUUID macro where the upper nybble of each buffer
4212 byte was inadvertently set to zero.
4214 ----------------------------------------
4215 19 November 2004. Summary of changes for version 20041119:
4217 1) ACPI CA Core Subsystem:
4219 Fixed a problem in the internal ConvertToInteger routine where new integers
4220 were not truncated to 32 bits for 32-bit ACPI tables. This routine converts
4221 buffers and strings to integers.
4223 Implemented support to store a value to an Index() on a String object. This
4224 is an ACPI 2.0 feature that had not yet been implemented.
4226 Implemented new behavior for storing objects to individual package elements
4227 (via the Index() operator). The previous behavior was to invoke the implicit
4228 conversion rules if an object was already present at the index. The new
4229 behavior is to simply delete any existing object and directly store the new
4230 object. Although the ACPI specification seems unclear on this subject, other
4231 ACPI implementations behave in this manner. (This is the root of the
4232 AE_BAD_HEX_CONSTANT issue.)
4234 Modified the RSDP memory scan mechanism to support the extended checksum for
4235 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
4236 RSDP signature is found with a valid checksum.
4238 Code and Data Size: Current and previous core subsystem library sizes are
4239 shown below. These are the code and data sizes for the acpica.lib produced
4240 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4241 any ACPI driver or OSPM code. The debug version of the code includes the
4242 debug output trace mechanism and has a much larger code and data size. Note
4243 that these values will vary depending on the efficiency of the compiler and
4244 the compiler options used during generation.
4247 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4248 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4250 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4251 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4254 2) iASL Compiler/Disassembler:
4256 Fixed a missing semicolon in the aslcompiler.y file.
4258 ----------------------------------------
4259 05 November 2004. Summary of changes for version 20041105:
4261 1) ACPI CA Core Subsystem:
4263 Implemented support for FADT revision 2. This was an interim table (between
4264 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
4266 Implemented optional support to allow uninitialized LocalX and ArgX
4267 variables in a control method. The variables are initialized to an Integer
4268 object with a value of zero. This support is enabled by setting the
4269 AcpiGbl_EnableInterpreterSlack flag to TRUE.
4271 Implemented support for Integer objects for the SizeOf operator. Either 4
4272 or 8 is returned, depending on the current integer size (32-bit or 64-bit,
4273 depending on the parent table revision).
4275 Fixed a problem in the implementation of the SizeOf and ObjectType operators
4276 where the operand was resolved to a value too early, causing incorrect
4277 return values for some objects.
4279 Fixed some possible memory leaks during exceptional conditions.
4281 Code and Data Size: Current and previous core subsystem library sizes are
4282 shown below. These are the code and data sizes for the acpica.lib produced
4283 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4284 any ACPI driver or OSPM code. The debug version of the code includes the
4285 debug output trace mechanism and has a much larger code and data size. Note
4286 that these values will vary depending on the efficiency of the compiler and
4287 the compiler options used during generation.
4290 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4291 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
4293 Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total
4294 Debug Version: 165.2K Code, 68.6K Data, 233.8K Total
4297 2) iASL Compiler/Disassembler:
4299 Implemented support for all ACPI 3.0 reserved names and methods.
4301 Implemented all ACPI 3.0 grammar elements in the front-end, including
4302 support for semicolons.
4304 Implemented the ACPI 3.0 Function() and ToUUID() macros
4306 Fixed a problem in the disassembler where a Scope() operator would not be
4307 emitted properly if the target of the scope was in another table.
4309 ----------------------------------------
4310 15 October 2004. Summary of changes for version 20041015:
4312 Note: ACPI CA is currently undergoing an in-depth and complete formal
4313 evaluation to test/verify the following areas. Other suggestions are
4314 welcome. This will result in an increase in the frequency of releases and
4315 the number of bug fixes in the next few months.
4316 - Functional tests for all ASL/AML operators
4317 - All implicit/explicit type conversions
4318 - Bit fields and operation regions
4319 - 64-bit math support and 32-bit-only "truncated" math support
4320 - Exceptional conditions, both compiler and interpreter
4321 - Dynamic object deletion and memory leaks
4322 - ACPI 3.0 support when implemented
4323 - External interfaces to the ACPI subsystem
4326 1) ACPI CA Core Subsystem:
4328 Fixed two alignment issues on 64-bit platforms - within debug statements in
4329 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the Address
4330 field within the non-aligned ACPI generic address structure.
4332 Fixed a problem in the Increment and Decrement operators where incorrect
4333 operand resolution could result in the inadvertent modification of the
4334 original integer when the integer is passed into another method as an
4335 argument and the arg is then incremented/decremented.
4337 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-bit
4338 BCD number were truncated during conversion.
4340 Fixed a problem in the ToDecimal operator where the length of the resulting
4341 string could be set incorrectly too long if the input operand was a Buffer
4344 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte (0)
4345 within a buffer would prematurely terminate a compare between buffer
4348 Added a check for string overflow (>200 characters as per the ACPI
4349 specification) during the Concatenate operator with two string operands.
4351 Code and Data Size: Current and previous core subsystem library sizes are
4352 shown below. These are the code and data sizes for the acpica.lib produced
4353 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4354 any ACPI driver or OSPM code. The debug version of the code includes the
4355 debug output trace mechanism and has a much larger code and data size. Note
4356 that these values will vary depending on the efficiency of the compiler and
4357 the compiler options used during generation.
4360 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4361 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
4363 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4364 Debug Version: 164.8K Code, 68.6K Data, 233.4K Total
4368 2) iASL Compiler/Disassembler:
4370 Allow the use of the ObjectType operator on uninitialized Locals and Args
4371 (returns 0 as per the ACPI specification).
4373 Fixed a problem where the compiler would fault if there was a syntax error
4374 in the FieldName of all of the various CreateXXXField operators.
4376 Disallow the use of lower case letters within the EISAID macro, as per the
4377 ACPI specification. All EISAID strings must be of the form "UUUNNNN" Where
4378 U is an uppercase letter and N is a hex digit.
4381 ----------------------------------------
4382 06 October 2004. Summary of changes for version 20041006:
4384 1) ACPI CA Core Subsystem:
4386 Implemented support for the ACPI 3.0 Timer operator. This ASL function
4387 implements a 64-bit timer with 100 nanosecond granularity.
4389 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
4390 implement the ACPI 3.0 Timer operator. This allows the host OS to implement
4391 the timer with the best clock available. Also, it keeps the core subsystem
4392 out of the clock handling business, since the host OS (usually) performs
4395 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
4396 functions use a 64-bit address which is part of the packed ACPI Generic
4397 Address Structure. Since the structure is non-aligned, the alignment macros
4398 are now used to extract the address to a local variable before use.
4400 Fixed a problem where the ToInteger operator assumed all input strings were
4401 hexadecimal. The operator now handles both decimal strings and hex strings
4402 (prefixed with "0x").
4404 Fixed a problem where the string length in the string object created as a
4405 result of the internal ConvertToString procedure could be incorrect. This
4406 potentially affected all implicit conversions and also the ToDecimalString
4407 and ToHexString operators.
4409 Fixed two problems in the ToString operator. If the length parameter was
4410 zero, an incorrect string object was created and the value of the input
4411 length parameter was inadvertently changed from zero to Ones.
4413 Fixed a problem where the optional ResourceSource string in the ExtendedIRQ
4414 resource macro was ignored.
4416 Simplified the interfaces to the internal division functions, reducing code
4417 size and complexity.
4419 Code and Data Size: Current and previous core subsystem library sizes are
4420 shown below. These are the code and data sizes for the acpica.lib produced
4421 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4422 any ACPI driver or OSPM code. The debug version of the code includes the
4423 debug output trace mechanism and has a much larger code and data size. Note
4424 that these values will vary depending on the efficiency of the compiler and
4425 the compiler options used during generation.
4428 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
4429 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
4431 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4432 Debug Version: 164.6K Code, 68.5K Data, 233.1K Total
4435 2) iASL Compiler/Disassembler:
4437 Implemented support for the ACPI 3.0 Timer operator.
4439 Fixed a problem where the Default() operator was inadvertently ignored in a
4440 Switch/Case block. This was a problem in the translation of the Switch
4441 statement to If...Else pairs.
4443 Added support to allow a standalone Return operator, with no parentheses (or
4446 Fixed a problem with code generation for the ElseIf operator where the
4447 translated Else...If parse tree was improperly constructed leading to the
4450 ----------------------------------------
4451 22 September 2004. Summary of changes for version 20040922:
4453 1) ACPI CA Core Subsystem:
4455 Fixed a problem with the implementation of the LNot() operator where "Ones"
4456 was not returned for the TRUE case. Changed the code to return Ones instead
4457 of (!Arg) which was usually 1. This change affects iASL constant folding for
4460 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was not
4461 initialized properly -- Now zero the entire buffer in this case where the
4462 buffer already exists.
4464 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
4465 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
4466 related code considerably. This will require changes/updates to all OS
4467 interface layers (OSLs.)
4469 Implemented a new external interface, AcpiInstallExceptionHandler, to allow
4470 a system exception handler to be installed. This handler is invoked upon any
4471 run-time exception that occurs during control method execution.
4473 Added support for the DSDT in AcpiTbFindTable. This allows the
4474 DataTableRegion() operator to access the local copy of the DSDT.
4476 Code and Data Size: Current and previous core subsystem library sizes are
4477 shown below. These are the code and data sizes for the acpica.lib produced
4478 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4479 any ACPI driver or OSPM code. The debug version of the code includes the
4480 debug output trace mechanism and has a much larger code and data size. Note
4481 that these values will vary depending on the efficiency of the compiler and
4482 the compiler options used during generation.
4485 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
4486 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
4488 Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total
4489 Debug Version: 164.5K Code, 68.3K Data, 232.8K Total
4492 2) iASL Compiler/Disassembler:
4494 Fixed a problem with constant folding and the LNot operator. LNot was
4495 returning 1 in the TRUE case, not Ones as per the ACPI specification. This
4496 could result in the generation of an incorrect folded/reduced constant.
4498 End-Of-File is now allowed within a "//"-style comment. A parse error no
4499 longer occurs if such a comment is at the very end of the input ASL source
4502 Implemented the "-r" option to override the Revision in the table header.
4503 The initial use of this option will be to simplify the evaluation of the AML
4504 interpreter by allowing a single ASL source module to be compiled for either
4505 32-bit or 64-bit integers.
4508 ----------------------------------------
4509 27 August 2004. Summary of changes for version 20040827:
4511 1) ACPI CA Core Subsystem:
4513 - Implemented support for implicit object conversion in the non-numeric
4514 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual, and
4515 LNotEqual.) Any combination of Integers/Strings/Buffers may now be used;
4516 the second operand is implicitly converted on the fly to match the type of
4517 the first operand. For example:
4519 LEqual (Source1, Source2)
4521 Source1 and Source2 must each evaluate to an integer, a string, or a buffer.
4522 The data type of Source1 dictates the required type of Source2. Source2 is
4523 implicitly converted if necessary to match the type of Source1.
4525 - Updated and corrected the behavior of the string conversion support. The
4526 rules concerning conversion of buffers to strings (according to the ACPI
4527 specification) are as follows:
4529 ToDecimalString - explicit byte-wise conversion of buffer to string of
4530 decimal values (0-255) separated by commas. ToHexString - explicit byte-wise
4531 conversion of buffer to string of hex values (0-FF) separated by commas.
4532 ToString - explicit byte-wise conversion of buffer to string. Byte-by-byte
4533 copy with no transform except NULL terminated. Any other implicit buffer-to-
4534 string conversion - byte-wise conversion of buffer to string of hex values
4535 (0-FF) separated by spaces.
4537 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
4539 - Fixed a problem in AcpiNsGetPathnameLength where the returned length was
4540 one byte too short in the case of a node in the root scope. This could
4541 cause a fault during debug output.
4543 - Code and Data Size: Current and previous core subsystem library sizes are
4544 shown below. These are the code and data sizes for the acpica.lib produced
4545 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4546 any ACPI driver or OSPM code. The debug version of the code includes the
4547 debug output trace mechanism and has a much larger code and data size. Note
4548 that these values will vary depending on the efficiency of the compiler and
4549 the compiler options used during generation.
4552 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
4553 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
4555 Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total
4556 Debug Version: 164.2K Code, 68.2K Data, 232.4K Total
4559 2) iASL Compiler/Disassembler:
4561 - Fixed a Linux generation error.
4564 ----------------------------------------
4565 16 August 2004. Summary of changes for version 20040816:
4567 1) ACPI CA Core Subsystem:
4569 Designed and implemented support within the AML interpreter for the so-
4570 called "implicit return". This support returns the result of the last ASL
4571 operation within a control method, in the absence of an explicit Return()
4572 operator. A few machines depend on this behavior, even though it is not
4573 explicitly supported by the ASL language. It is optional support that can
4574 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
4576 Removed support for the PCI_Config address space from the internal low level
4577 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite). This
4578 support was not used internally, and would not work correctly anyway because
4579 the PCI bus number and segment number were not supported. There are
4580 separate interfaces for PCI configuration space access because of the unique
4583 Code and Data Size: Current and previous core subsystem library sizes are
4584 shown below. These are the code and data sizes for the acpica.lib produced
4585 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4586 any ACPI driver or OSPM code. The debug version of the code includes the
4587 debug output trace mechanism and has a much larger code and data size. Note
4588 that these values will vary depending on the efficiency of the compiler and
4589 the compiler options used during generation.
4592 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4593 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
4595 Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total
4596 Debug Version: 164.1K Code, 68.3K Data, 232.4K Total
4599 2) iASL Compiler/Disassembler:
4601 Fixed a problem where constants in ASL expressions at the root level (not
4602 within a control method) could be inadvertently truncated during code
4603 generation. This problem was introduced in the 20040715 release.
4606 ----------------------------------------
4607 15 July 2004. Summary of changes for version 20040715:
4609 1) ACPI CA Core Subsystem:
4611 Restructured the internal HW GPE interfaces to pass/track the current state
4612 of interrupts (enabled/disabled) in order to avoid possible deadlock and
4613 increase flexibility of the interfaces.
4615 Implemented a "lexicographical compare" for String and Buffer objects within
4616 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual --
4617 as per further clarification to the ACPI specification. Behavior is similar
4618 to C library "strcmp".
4620 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
4621 external function. In the 32-bit non-debug case, the stack use has been
4622 reduced from 168 bytes to 32 bytes.
4624 Deployed a new run-time configuration flag, AcpiGbl_EnableInterpreterSlack,
4625 whose purpose is to allow the AML interpreter to forgive certain bad AML
4626 constructs. Default setting is FALSE.
4628 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field IO
4629 support code. If enabled, it allows field access to go beyond the end of a
4630 region definition if the field is within the region length rounded up to the
4631 next access width boundary (a common coding error.)
4633 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
4634 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols. Also, these
4635 symbols are lowercased by the latest version of the AcpiSrc tool.
4637 The prototypes for the PCI interfaces in acpiosxf.h have been updated to
4638 rename "Register" to simply "Reg" to prevent certain compilers from
4641 Code and Data Size: Current and previous core subsystem library sizes are
4642 shown below. These are the code and data sizes for the acpica.lib produced
4643 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4644 any ACPI driver or OSPM code. The debug version of the code includes the
4645 debug output trace mechanism and has a much larger code and data size. Note
4646 that these values will vary depending on the efficiency of the compiler and
4647 the compiler options used during generation.
4650 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4651 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
4653 Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total
4654 Debug Version: 164.1K Code, 68.2K Data, 232.3K Total
4657 2) iASL Compiler/Disassembler:
4659 Implemented full support for Package objects within the Case() operator.
4660 Note: The Break() operator is currently not supported within Case blocks
4661 (TermLists) as there is some question about backward compatibility with ACPI
4665 Fixed a problem where complex terms were not supported properly within the
4668 Eliminated extraneous warning for compiler-emitted reserved names of the
4669 form "_T_x". (Used in Switch/Case operators.)
4671 Eliminated optimization messages for "_T_x" objects and small constants
4672 within the DefinitionBlock operator.
4675 ----------------------------------------
4676 15 June 2004. Summary of changes for version 20040615:
4678 1) ACPI CA Core Subsystem:
4680 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
4681 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
4684 All directory names in the entire source package are lower case, as they
4685 were in earlier releases.
4687 Implemented "Disassemble" command in the AML debugger that will disassemble
4688 a single control method.
4690 Code and Data Size: Current and previous core subsystem library sizes are
4691 shown below. These are the code and data sizes for the acpica.lib produced
4692 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4693 any ACPI driver or OSPM code. The debug version of the code includes the
4694 debug output trace mechanism and has a much larger code and data size. Note
4695 that these values will vary depending on the efficiency of the compiler and
4696 the compiler options used during generation.
4699 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
4700 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
4703 Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total
4704 Debug Version: 163.8K Code, 68.2K Data, 232.0K Total
4707 2) iASL Compiler/Disassembler:
4709 Implemented support for Buffer and String objects (as per ACPI 2.0) for the
4710 following ASL operators: LEqual, LGreater, LLess, LGreaterEqual, and
4713 All directory names in the entire source package are lower case, as they
4714 were in earlier releases.
4716 Fixed a fault when using the -g or -d<nofilename> options if the FADT was
4719 Fixed an issue with the Windows version of the compiler where later versions
4720 of Windows place the FADT in the registry under the name "FADT" and not
4721 "FACP" as earlier versions did. This applies when using the -g or -
4722 d<nofilename> options. The compiler now looks for both strings as
4725 Fixed a problem with compiler namepath optimization where a namepath within
4726 the Scope() operator could not be optimized if the namepath was a subpath of
4727 the current scope path.
4729 ----------------------------------------
4730 27 May 2004. Summary of changes for version 20040527:
4732 1) ACPI CA Core Subsystem:
4734 Completed a new design and implementation for EBDA (Extended BIOS Data Area)
4735 support in the RSDP scan code. The original code improperly scanned for the
4736 EBDA by simply scanning from memory location 0 to 0x400. The correct method
4737 is to first obtain the EBDA pointer from within the BIOS data area, then
4738 scan 1K of memory starting at the EBDA pointer. There appear to be few if
4739 any machines that place the RSDP in the EBDA, however.
4741 Integrated a fix for a possible fault during evaluation of BufferField
4742 arguments. Obsolete code that was causing the problem was removed.
4744 Found and fixed a problem in the Field Support Code where data could be
4745 corrupted on a bit field read that starts on an aligned boundary but does
4746 not end on an aligned boundary. Merged the read/write "datum length"
4747 calculation code into a common procedure.
4749 Rolled in a couple of changes to the FreeBSD-specific header.
4752 Code and Data Size: Current and previous core subsystem library sizes are
4753 shown below. These are the code and data sizes for the acpica.lib produced
4754 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4755 any ACPI driver or OSPM code. The debug version of the code includes the
4756 debug output trace mechanism and has a much larger code and data size. Note
4757 that these values will vary depending on the efficiency of the compiler and
4758 the compiler options used during generation.
4761 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
4762 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
4764 Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total
4765 Debug Version: 163.3K Code, 67.2K Data, 230.5K Total
4768 2) iASL Compiler/Disassembler:
4770 Fixed a generation warning produced by some overly-verbose compilers for a
4773 ----------------------------------------
4774 14 May 2004. Summary of changes for version 20040514:
4776 1) ACPI CA Core Subsystem:
4778 Fixed a problem where hardware GPE enable bits sometimes not set properly
4779 during and after GPE method execution. Result of 04/27 changes.
4781 Removed extra "clear all GPEs" when sleeping/waking.
4783 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
4784 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above to
4785 the new AcpiEv* calls as appropriate.
4787 ACPI_OS_NAME was removed from the OS-specific headers. The default name is
4788 now "Microsoft Windows NT" for maximum compatibility. However this can be
4789 changed by modifying the acconfig.h file.
4791 Allow a single invocation of AcpiInstallNotifyHandler for a handler that
4792 traps both types of notifies (System, Device). Use ACPI_ALL_NOTIFY flag.
4794 Run _INI methods on ThermalZone objects. This is against the ACPI
4795 specification, but there is apparently ASL code in the field that has these
4796 _INI methods, and apparently "other" AML interpreters execute them.
4798 Performed a full 16/32/64 bit lint that resulted in some small changes.
4800 Added a sleep simulation command to the AML debugger to test sleep code.
4802 Code and Data Size: Current and previous core subsystem library sizes are
4803 shown below. These are the code and data sizes for the acpica.lib produced
4804 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4805 any ACPI driver or OSPM code. The debug version of the code includes the
4806 debug output trace mechanism and has a much larger code and data size. Note
4807 that these values will vary depending on the efficiency of the compiler and
4808 the compiler options used during generation.
4811 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
4812 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
4814 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
4815 Debug Version: 163.2K Code, 67.2K Data, 230.4K Total
4817 ----------------------------------------
4818 27 April 2004. Summary of changes for version 20040427:
4820 1) ACPI CA Core Subsystem:
4822 Completed a major overhaul of the GPE handling within ACPI CA. There are
4823 now three types of GPEs: wake-only, runtime-only, and combination wake/run.
4824 The only GPEs allowed to be combination wake/run are for button-style
4825 devices such as a control-method power button, control-method sleep button,
4826 or a notebook lid switch. GPEs that have an _Lxx or _Exx method and are not
4827 referenced by any _PRW methods are marked for "runtime" and hardware
4828 enabled. Any GPE that is referenced by a _PRW method is marked for "wake"
4829 (and disabled at runtime). However, at sleep time, only those GPEs that
4830 have been specifically enabled for wake via the AcpiEnableGpe interface will
4831 actually be hardware enabled.
4833 A new external interface has been added, AcpiSetGpeType(), that is meant to
4834 be used by device drivers to force a GPE to a particular type. It will be
4835 especially useful for the drivers for the button devices mentioned above.
4837 Completed restructuring of the ACPI CA initialization sequence so that
4838 default operation region handlers are installed before GPEs are initialized
4839 and the _PRW methods are executed. This will prevent errors when the _PRW
4840 methods attempt to access system memory or I/O space.
4842 GPE enable/disable no longer reads the GPE enable register. We now keep the
4843 enable info for runtime and wake separate and in the GPE_EVENT_INFO. We
4844 thus no longer depend on the hardware to maintain these bits.
4846 Always clear the wake status and fixed/GPE status bits before sleep, even
4849 Improved the AML debugger output for displaying the GPE blocks and their
4852 Added new strings for the _OSI method, of the form "Windows 2001 SPx" where
4855 Fixed a problem where the physical address was incorrectly calculated when
4856 the Load() operator was used to directly load from an Operation Region (vs.
4857 loading from a Field object.) Also added check for minimum table length for
4860 Fix for multiple mutex acquisition. Restore original thread SyncLevel on
4863 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
4864 consistency with the other fields returned.
4866 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one such
4867 structure for each GPE in the system, so the size of this structure is
4870 CPU stack requirement reduction: Cleaned up the method execution and object
4871 evaluation paths so that now a parameter structure is passed, instead of
4872 copying the various method parameters over and over again.
4874 In evregion.c: Correctly exit and reenter the interpreter region if and
4875 only if dispatching an operation region request to a user-installed handler.
4876 Do not exit/reenter when dispatching to a default handler (e.g., default
4877 system memory or I/O handlers)
4880 Notes for updating drivers for the new GPE support. The following changes
4881 must be made to ACPI-related device drivers that are attached to one or more
4882 GPEs: (This information will be added to the ACPI CA Programmer Reference.)
4884 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you must
4885 explicitly call AcpiEnableGpe.
4886 2) There is a new interface called AcpiSetGpeType. This should be called
4887 before enabling the GPE. Also, this interface will automatically disable
4888 the GPE if it is currently enabled.
4889 3) AcpiEnableGpe no longer supports a GPE type flag.
4891 Specific drivers that must be changed:
4893 AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
4894 AeGpeHandler, NULL);
4895 AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
4896 AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
4898 2) Button Drivers (Power, Lid, Sleep):
4899 Run _PRW method under parent device
4900 If _PRW exists: /* This is a control-method button */
4901 Extract GPE number and possibly GpeDevice
4902 AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
4903 AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
4905 For all other devices that have _PRWs, we automatically set the GPE type to
4906 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled. This
4907 must be done on a selective basis, usually requiring some kind of user app
4908 to allow the user to pick the wake devices.
4911 Code and Data Size: Current and previous core subsystem library sizes are
4912 shown below. These are the code and data sizes for the acpica.lib produced
4913 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4914 any ACPI driver or OSPM code. The debug version of the code includes the
4915 debug output trace mechanism and has a much larger code and data size. Note
4916 that these values will vary depending on the efficiency of the compiler and
4917 the compiler options used during generation.
4920 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
4921 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
4924 Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total
4925 Debug Version: 162.9K Code, 67.0K Data, 229.9K Total
4929 ----------------------------------------
4930 02 April 2004. Summary of changes for version 20040402:
4932 1) ACPI CA Core Subsystem:
4934 Fixed an interpreter problem where an indirect store through an ArgX
4935 parameter was incorrectly applying the "implicit conversion rules" during
4936 the store. From the ACPI specification: "If the target is a method local or
4937 argument (LocalX or ArgX), no conversion is performed and the result is
4938 stored directly to the target". The new behavior is to disable implicit
4939 conversion during ALL stores to an ArgX.
4941 Changed the behavior of the _PRW method scan to ignore any and all errors
4942 returned by a given _PRW. This prevents the scan from aborting from the
4943 failure of any single _PRW.
4945 Moved the runtime configuration parameters from the global init procedure to
4946 static variables in acglobal.h. This will allow the host to override the
4947 default values easily.
4949 Code and Data Size: Current and previous core subsystem library sizes are
4950 shown below. These are the code and data sizes for the acpica.lib produced
4951 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
4952 any ACPI driver or OSPM code. The debug version of the code includes the
4953 debug output trace mechanism and has a much larger code and data size. Note
4954 that these values will vary depending on the efficiency of the compiler and
4955 the compiler options used during generation.
4958 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
4959 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
4961 Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total
4962 Debug Version: 161.0K Code, 66.3K Data, 227.3K Total
4965 2) iASL Compiler/Disassembler:
4967 iASL now fully disassembles SSDTs. However, External() statements are not
4968 generated automatically for unresolved symbols at this time. This is a
4969 planned feature for future implementation.
4971 Fixed a scoping problem in the disassembler that occurs when the type of the
4972 target of a Scope() operator is overridden. This problem caused an
4973 incorrectly nested internal namespace to be constructed.
4975 Any warnings or errors that are emitted during disassembly are now commented
4976 out automatically so that the resulting file can be recompiled without any
4979 ----------------------------------------
4980 26 March 2004. Summary of changes for version 20040326:
4982 1) ACPI CA Core Subsystem:
4984 Implemented support for "wake" GPEs via interaction between GPEs and the
4985 _PRW methods. Every GPE that is pointed to by one or more _PRWs is
4986 identified as a WAKE GPE and by default will no longer be enabled at
4987 runtime. Previously, we were blindly enabling all GPEs with a corresponding
4988 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway. We
4989 believe this has been the cause of thousands of "spurious" GPEs on some
4992 This new GPE behavior is can be reverted to the original behavior (enable
4993 ALL GPEs at runtime) via a runtime flag.
4995 Fixed a problem where aliased control methods could not access objects
4996 properly. The proper scope within the namespace was not initialized
4997 (transferred to the target of the aliased method) before executing the
5000 Fixed a potential race condition on internal object deletion on the return
5001 object in AcpiEvaluateObject.
5003 Integrated a fix for resource descriptors where both _MEM and _MTP were
5004 being extracted instead of just _MEM. (i.e. bitmask was incorrectly too
5005 wide, 0x0F instead of 0x03.)
5007 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, preventing a
5008 fault in some cases.
5010 Updated Notify() values for debug statements in evmisc.c
5012 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
5014 Code and Data Size: Current and previous core subsystem library sizes are
5015 shown below. These are the code and data sizes for the acpica.lib produced
5016 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5017 any ACPI driver or OSPM code. The debug version of the code includes the
5018 debug output trace mechanism and has a much larger code and data size. Note
5019 that these values will vary depending on the efficiency of the compiler and
5020 the compiler options used during generation.
5024 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5025 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5027 Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total
5028 Debug Version: 160.8K Code, 66.1K Data, 226.9K Total
5030 ----------------------------------------
5031 11 March 2004. Summary of changes for version 20040311:
5033 1) ACPI CA Core Subsystem:
5035 Fixed a problem where errors occurring during the parse phase of control
5036 method execution did not abort cleanly. For example, objects created and
5037 installed in the namespace were not deleted. This caused all subsequent
5038 invocations of the method to return the AE_ALREADY_EXISTS exception.
5040 Implemented a mechanism to force a control method to "Serialized" execution
5041 if the method attempts to create namespace objects. (The root of the
5042 AE_ALREADY_EXISTS problem.)
5044 Implemented support for the predefined _OSI "internal" control method.
5045 Initial supported strings are "Linux", "Windows 2000", "Windows 2001", and
5046 "Windows 2001.1", and can be easily upgraded for new strings as necessary.
5047 This feature will allow "other" operating systems to execute the fully
5048 tested, "Windows" code path through the ASL code
5050 Global Lock Support: Now allows multiple acquires and releases with any
5051 internal thread. Removed concept of "owning thread" for this special mutex.
5053 Fixed two functions that were inappropriately declaring large objects on the
5054 CPU stack: PsParseLoop, NsEvaluateRelative. Reduces the stack usage during
5055 method execution considerably.
5057 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
5058 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
5060 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
5061 defined on the machine.
5063 Implemented two runtime options: One to force all control method execution
5064 to "Serialized" to mimic Windows behavior, another to disable _OSI support
5065 if it causes problems on a given machine.
5067 Code and Data Size: Current and previous core subsystem library sizes are
5068 shown below. These are the code and data sizes for the acpica.lib produced
5069 by the Microsoft Visual C++ 6.0 compiler, and these values do not include
5070 any ACPI driver or OSPM code. The debug version of the code includes the
5071 debug output trace mechanism and has a much larger code and data size. Note
5072 that these values will vary depending on the efficiency of the compiler and
5073 the compiler options used during generation.
5076 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5077 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5079 Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total
5080 Debug Version: 160.3K Code, 66.0K Data, 226.3K Total
5082 2) iASL Compiler/Disassembler:
5084 Fixed an array size problem for FreeBSD that would cause the compiler to
5087 ----------------------------------------
5088 20 February 2004. Summary of changes for version 20040220:
5091 1) ACPI CA Core Subsystem:
5093 Implemented execution of _SxD methods for Device objects in the
5094 GetObjectInfo interface.
5096 Fixed calls to _SST method to pass the correct arguments.
5098 Added a call to _SST on wake to restore to "working" state.
5100 Check for End-Of-Buffer failure case in the WalkResources interface.
5102 Integrated fix for 64-bit alignment issue in acglobal.h by moving two
5103 structures to the beginning of the file.
5105 After wake, clear GPE status register(s) before enabling GPEs.
5107 After wake, clear/enable power button. (Perhaps we should clear/enable all
5108 fixed events upon wake.)
5110 Fixed a couple of possible memory leaks in the Namespace manager.
5112 Integrated latest acnetbsd.h file.
5114 ----------------------------------------
5115 11 February 2004. Summary of changes for version 20040211:
5118 1) ACPI CA Core Subsystem:
5120 Completed investigation and implementation of the call-by-reference
5121 mechanism for control method arguments.
5123 Fixed a problem where a store of an object into an indexed package could
5124 fail if the store occurs within a different method than the method that
5125 created the package.
5127 Fixed a problem where the ToDecimal operator could return incorrect results.
5129 Fixed a problem where the CopyObject operator could fail on some of the more
5130 obscure objects (e.g., Reference objects.)
5132 Improved the output of the Debug object to display buffer, package, and
5135 Fixed a problem where constructs of the form "RefOf (ArgX)" did not return
5136 the expected result.
5138 Added permanent ACPI_REPORT_ERROR macros for all instances of the
5139 ACPI_AML_INTERNAL exception.
5141 Integrated latest version of acfreebsd.h
5143 ----------------------------------------
5144 16 January 2004. Summary of changes for version 20040116:
5146 The purpose of this release is primarily to update the copyright years in
5147 each module, thus causing a huge number of diffs. There are a few small
5148 functional changes, however.
5150 1) ACPI CA Core Subsystem:
5152 Improved error messages when there is a problem finding one or more of the
5153 required base ACPI tables
5155 Reintroduced the definition of APIC_HEADER in actbl.h
5157 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
5159 Removed extraneous reference to NewObj in dsmthdat.c
5163 Fixed a problem introduced in December that disabled the correct disassembly
5164 of Resource Templates
5167 ----------------------------------------
5168 03 December 2003. Summary of changes for version 20031203:
5170 1) ACPI CA Core Subsystem:
5172 Changed the initialization of Operation Regions during subsystem
5173 init to perform two entire walks of the ACPI namespace; The first
5174 to initialize the regions themselves, the second to execute the
5175 _REG methods. This fixed some interdependencies across _REG
5176 methods found on some machines.
5178 Fixed a problem where a Store(Local0, Local1) could simply update
5179 the object reference count, and not create a new copy of the
5180 object if the Local1 is uninitialized.
5182 Implemented support for the _SST reserved method during sleep
5185 Implemented support to clear the SLP_TYP and SLP_EN bits when
5186 waking up, this is apparently required by some machines.
5188 When sleeping, clear the wake status only if SleepState is not S5.
5190 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
5191 pointer arithmetic advanced a string pointer too far.
5193 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
5194 could be returned if the requested table has not been loaded.
5196 Within the support for IRQ resources, restructured the handling of
5197 the active and edge/level bits.
5199 Fixed a few problems in AcpiPsxExecute() where memory could be
5200 leaked under certain error conditions.
5202 Improved error messages for the cases where the ACPI mode could
5205 Code and Data Size: Current and previous core subsystem library
5206 sizes are shown below. These are the code and data sizes for the
5207 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5208 these values do not include any ACPI driver or OSPM code. The
5209 debug version of the code includes the debug output trace
5210 mechanism and has a much larger code and data size. Note that
5211 these values will vary depending on the efficiency of the compiler
5212 and the compiler options used during generation.
5214 Previous Release (20031029):
5215 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5216 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5218 Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total
5219 Debug Version: 158.7K Code, 65.1K Data, 223.8K Total
5221 2) iASL Compiler/Disassembler:
5223 Implemented a fix for the iASL disassembler where a bad index was
5224 generated. This was most noticeable on 64-bit platforms
5227 ----------------------------------------
5228 29 October 2003. Summary of changes for version 20031029:
5230 1) ACPI CA Core Subsystem:
5233 Fixed a problem where a level-triggered GPE with an associated
5234 _Lxx control method was incorrectly cleared twice.
5236 Fixed a problem with the Field support code where an access can
5237 occur beyond the end-of-region if the field is non-aligned but
5238 extends to the very end of the parent region (resulted in an
5239 AE_AML_REGION_LIMIT exception.)
5241 Fixed a problem with ACPI Fixed Events where an RT Clock handler
5242 would not get invoked on an RTC event. The RTC event bitmasks for
5243 the PM1 registers were not being initialized properly.
5245 Implemented support for executing _STA and _INI methods for
5246 Processor objects. Although this is currently not part of the
5247 ACPI specification, there is existing ASL code that depends on the
5248 init-time execution of these methods.
5250 Implemented and deployed a GetDescriptorName function to decode
5251 the various types of internal descriptors. Guards against null
5252 descriptors during debug output also.
5254 Implemented and deployed a GetNodeName function to extract the 4-
5255 character namespace node name. This function simplifies the debug
5256 and error output, as well as guarding against null pointers during
5259 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
5260 simplify the debug and error output of 64-bit integers. This
5261 macro replaces the HIDWORD and LODWORD macros for dumping these
5264 Updated the implementation of the Stall() operator to only call
5265 AcpiOsStall(), and also return an error if the operand is larger
5266 than 255. This preserves the required behavior of not
5267 relinquishing the processor, as would happen if AcpiOsSleep() was
5268 called for "long stalls".
5270 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
5271 initialized are now treated as NOOPs.
5273 Cleaned up a handful of warnings during 64-bit generation.
5275 Fixed a reported error where and incorrect GPE number was passed
5276 to the GPE dispatch handler. This value is only used for error
5277 output, however. Used this opportunity to clean up and streamline
5278 the GPE dispatch code.
5280 Code and Data Size: Current and previous core subsystem library
5281 sizes are shown below. These are the code and data sizes for the
5282 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5283 these values do not include any ACPI driver or OSPM code. The
5285 debug version of the code includes the debug output trace
5286 mechanism and has a much larger code and data size. Note that
5287 these values will vary depending on the efficiency of the compiler
5288 and the compiler options used during generation.
5290 Previous Release (20031002):
5291 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5292 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5294 Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total
5295 Debug Version: 158.3K Code, 65.0K Data, 223.3K Total
5298 2) iASL Compiler/Disassembler:
5300 Updated the iASL compiler to return an error if the operand to the
5301 Stall() operator is larger than 255.
5304 ----------------------------------------
5305 02 October 2003. Summary of changes for version 20031002:
5308 1) ACPI CA Core Subsystem:
5310 Fixed a problem with Index Fields where the index was not
5311 incremented for fields that require multiple writes to the
5312 index/data registers (Fields that are wider than the data
5315 Fixed a problem with all Field objects where a write could go
5316 beyond the end-of-field if the field was larger than the access
5317 granularity and therefore required multiple writes to complete the
5318 request. An extra write beyond the end of the field could happen
5321 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
5322 would incorrectly be returned if the width of the Data Register
5323 was larger than the specified field access width.
5325 Completed fixes for LoadTable() and Unload() and verified their
5326 operation. Implemented full support for the "DdbHandle" object
5327 throughout the ACPI CA subsystem.
5329 Implemented full support for the MADT and ECDT tables in the ACPI
5330 CA header files. Even though these tables are not directly
5331 consumed by ACPI CA, the header definitions are useful for ACPI
5334 Integrated resource descriptor fixes posted to the Linux ACPI
5335 list. This included checks for minimum descriptor length, and
5336 support for trailing NULL strings within descriptors that have
5337 optional string elements.
5339 Code and Data Size: Current and previous core subsystem library
5340 sizes are shown below. These are the code and data sizes for the
5341 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5342 these values do not include any ACPI driver or OSPM code. The
5343 debug version of the code includes the debug output trace
5344 mechanism and has a much larger code and data size. Note that
5345 these values will vary depending on the efficiency of the compiler
5346 and the compiler options used during generation.
5348 Previous Release (20030918):
5349 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5350 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5352 Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total
5353 Debug Version: 157.9K Code, 64.8K Data, 222.7K Total
5358 Implemented detection of non-ASCII characters within the input
5359 source ASL file. This catches attempts to compile binary (AML)
5360 files early in the compile, with an informative error message.
5362 Fixed a problem where the disassembler would fault if the output
5363 filename could not be generated or if the output file could not be
5366 ----------------------------------------
5367 18 September 2003. Summary of changes for version 20030918:
5370 1) ACPI CA Core Subsystem:
5372 Found and fixed a longstanding problem with the late execution of
5373 the various deferred AML opcodes (such as Operation Regions,
5374 Buffer Fields, Buffers, and Packages). If the name string
5375 specified for the name of the new object placed the object in a
5376 scope other than the current scope, the initialization/execution
5377 of the opcode failed. The solution to this problem was to
5378 implement a mechanism where the late execution of such opcodes
5379 does not attempt to lookup/create the name a second time in an
5380 incorrect scope. This fixes the "region size computed
5381 incorrectly" problem.
5383 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
5384 Global Lock AE_BAD_PARAMETER error.
5386 Fixed several 64-bit issues with prototypes, casting and data
5389 Removed duplicate prototype from acdisasm.h
5391 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
5393 Code and Data Size: Current and previous core subsystem library
5394 sizes are shown below. These are the code and data sizes for the
5395 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5396 these values do not include any ACPI driver or OSPM code. The
5397 debug version of the code includes the debug output trace
5398 mechanism and has a much larger code and data size. Note that
5399 these values will vary depending on the efficiency of the compiler
5400 and the compiler options used during generation.
5404 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
5405 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
5407 Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total
5408 Debug Version: 157.3K Code, 64.5K Data, 221.8K Total
5413 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
5414 correct sleep time in seconds.
5416 ----------------------------------------
5417 14 July 2003. Summary of changes for version 20030619:
5419 1) ACPI CA Core Subsystem:
5421 Parse SSDTs in order discovered, as opposed to reverse order
5424 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
5431 Dynamically allocate SDT list (suggested by Andi Kleen)
5433 proc function return value cleanups (Andi Kleen)
5435 Correctly handle NMI watchdog during long stalls (Andrew Morton)
5437 Make it so acpismp=force works (reported by Andrew Morton)
5440 ----------------------------------------
5441 19 June 2003. Summary of changes for version 20030619:
5443 1) ACPI CA Core Subsystem:
5445 Fix To/FromBCD, eliminating the need for an arch-specific #define.
5447 Do not acquire a semaphore in the S5 shutdown path.
5449 Fix ex_digits_needed for 0. (Takayoshi Kochi)
5451 Fix sleep/stall code reversal. (Andi Kleen)
5453 Revert a change having to do with control method calling
5458 acpiphp update (Takayoshi Kochi)
5460 Export acpi_disabled for sonypi (Stelian Pop)
5462 Mention acpismp=force in config help
5464 Re-add acpitable.c and acpismp=force. This improves backwards
5466 compatibility and also cleans up the code to a significant degree.
5468 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
5470 ----------------------------------------
5471 22 May 2003. Summary of changes for version 20030522:
5473 1) ACPI CA Core Subsystem:
5475 Found and fixed a reported problem where an AE_NOT_FOUND error
5476 occurred occasionally during _BST evaluation. This turned out to
5477 be an Owner ID allocation issue where a called method did not get
5478 a new ID assigned to it. Eventually, (after 64k calls), the Owner
5479 ID UINT16 would wraparound so that the ID would be the same as the
5480 caller's and the called method would delete the caller's
5483 Implemented extended error reporting for control methods that are
5484 aborted due to a run-time exception. Output includes the exact
5485 AML instruction that caused the method abort, a dump of the method
5486 locals and arguments at the time of the abort, and a trace of all
5487 nested control method calls.
5489 Modified the interpreter to allow the creation of buffers of zero
5490 length from the AML code. Implemented new code to ensure that no
5491 attempt is made to actually allocate a memory buffer (of length
5492 zero) - instead, a simple buffer object with a NULL buffer pointer
5493 and length zero is created. A warning is no longer issued when
5494 the AML attempts to create a zero-length buffer.
5496 Implemented a workaround for the "leading asterisk issue" in
5497 _HIDs, _UIDs, and _CIDs in the AML interpreter. One leading
5498 asterisk is automatically removed if present in any HID, UID, or
5499 CID strings. The iASL compiler will still flag this asterisk as
5502 Implemented full support for _CID methods that return a package of
5503 multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() interface
5504 now additionally returns a device _CID list if present. This
5505 required a change to the external interface in order to pass an
5506 ACPI_BUFFER object as a parameter since the _CID list is of
5509 Fixed a problem with the new AE_SAME_HANDLER exception where
5510 handler initialization code did not know about this exception.
5512 Code and Data Size: Current and previous core subsystem library
5513 sizes are shown below. These are the code and data sizes for the
5514 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
5515 these values do not include any ACPI driver or OSPM code. The
5516 debug version of the code includes the debug output trace
5517 mechanism and has a much larger code and data size. Note that
5518 these values will vary depending on the efficiency of the compiler
5519 and the compiler options used during generation.
5521 Previous Release (20030509):
5522 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
5523 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
5525 Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total
5526 Debug Version: 156.9K Code, 64.2K Data, 221.1K Total
5531 Fixed a bug in which we would reinitialize the ACPI interrupt
5532 after it was already working, thus disabling all ACPI and the IRQs
5533 for any other device sharing the interrupt. (Thanks to Stian
5536 Toshiba driver update (John Belmonte)
5538 Return only 0 or 1 for our interrupt handler status (Andrew
5544 Fixed a reported problem where multiple (nested) ElseIf()
5545 statements were not handled correctly by the compiler, resulting
5546 in incorrect warnings and incorrect AML code. This was a problem
5547 in both the ASL parser and the code generator.
5552 Added changes to existing interfaces, new exception codes, and new
5553 text concerning reference count object management versus garbage
5556 ----------------------------------------
5557 09 May 2003. Summary of changes for version 20030509.
5560 1) ACPI CA Core Subsystem:
5562 Changed the subsystem initialization sequence to hold off
5563 installation of address space handlers until the hardware has been
5564 initialized and the system has entered ACPI mode. This is because
5565 the installation of space handlers can cause _REG methods to be
5566 run. Previously, the _REG methods could potentially be run before
5567 ACPI mode was enabled.
5569 Fixed some memory leak issues related to address space handler and
5570 notify handler installation. There were some problems with the
5571 reference count mechanism caused by the fact that the handler
5572 objects are shared across several namespace objects.
5574 Fixed a reported problem where reference counts within the
5575 namespace were not properly updated when named objects created by
5576 method execution were deleted.
5578 Fixed a reported problem where multiple SSDTs caused a deletion
5579 issue during subsystem termination. Restructured the table data
5580 structures to simplify the linked lists and the related code.
5582 Fixed a problem where the table ID associated with secondary
5583 tables (SSDTs) was not being propagated into the namespace objects
5584 created by those tables. This would only present a problem for
5585 tables that are unloaded at run-time, however.
5587 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
5588 type as the length parameter (instead of UINT32).
5590 Solved a long-standing problem where an ALREADY_EXISTS error
5591 appears on various systems. This problem could happen when there
5592 are multiple PCI_Config operation regions under a single PCI root
5593 bus. This doesn't happen very frequently, but there are some
5594 systems that do this in the ASL.
5596 Fixed a reported problem where the internal DeleteNode function
5597 was incorrectly handling the case where a namespace node was the
5598 first in the parent's child list, and had additional peers (not
5599 the only child, but first in the list of children.)
5601 Code and Data Size: Current core subsystem library sizes are shown
5602 below. These are the code and data sizes for the acpica.lib
5603 produced by the Microsoft Visual C++ 6.0 compiler, and these
5604 values do not include any ACPI driver or OSPM code. The debug
5605 version of the code includes the debug output trace mechanism and
5606 has a much larger code and data size. Note that these values will
5607 vary depending on the efficiency of the compiler and the compiler
5608 options used during generation.
5611 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
5612 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
5614 Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total
5615 Debug Version: 156.1K Code, 63.9K Data, 220.0K Total
5620 Allow ":" in OS override string (Ducrot Bruno)
5622 Kobject fix (Greg KH)
5625 3 iASL Compiler/Disassembler:
5627 Fixed a problem in the generation of the C source code files (AML
5628 is emitted in C source statements for BIOS inclusion) where the
5629 Ascii dump that appears within a C comment at the end of each line
5630 could cause a compile time error if the AML sequence happens to
5631 have an open comment or close comment sequence embedded.
5634 ----------------------------------------
5635 24 April 2003. Summary of changes for version 20030424.
5638 1) ACPI CA Core Subsystem:
5640 Support for big-endian systems has been implemented. Most of the
5641 support has been invisibly added behind big-endian versions of the
5644 Fixed a problem in AcpiHwDisableGpeBlock() and
5645 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
5646 low level hardware write routine. The offset parameter was
5647 actually eliminated from the low level read/write routines because
5648 they had become obsolete.
5650 Fixed a problem where a handler object was deleted twice during
5651 the removal of a fixed event handler.
5656 A fix for SMP systems with link devices was contributed by
5660 (2.5) Return whether we handled the interrupt in our IRQ handler.
5661 (Linux ISRs no longer return void, so we can propagate the handler
5662 return value from the ACPI CA core back to the OS.)
5668 The ACPI CA Programmer Reference has been updated to reflect new
5669 interfaces and changes to existing interfaces.
5671 ----------------------------------------
5672 28 March 2003. Summary of changes for version 20030328.
5674 1) ACPI CA Core Subsystem:
5676 The GPE Block Device support has been completed. New interfaces
5677 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event
5678 interfaces (enable, disable, clear, getstatus) have been split
5679 into separate interfaces for Fixed Events and General Purpose
5680 Events (GPEs) in order to support GPE Block Devices properly.
5682 Fixed a problem where the error message "Failed to acquire
5683 semaphore" would appear during operations on the embedded
5686 Code and Data Size: Current core subsystem library sizes are shown
5687 below. These are the code and data sizes for the acpica.lib
5688 produced by the Microsoft Visual C++ 6.0 compiler, and these
5689 values do not include any ACPI driver or OSPM code. The debug
5690 version of the code includes the debug output trace mechanism and
5691 has a much larger code and data size. Note that these values will
5692 vary depending on the efficiency of the compiler and the compiler
5693 options used during generation.
5696 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
5697 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
5699 Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total
5700 Debug Version: 156.1K Code, 63.6K Data, 219.7K Total
5703 ----------------------------------------
5704 28 February 2003. Summary of changes for version 20030228.
5707 1) ACPI CA Core Subsystem:
5709 The GPE handling and dispatch code has been completely overhauled
5710 in preparation for support of GPE Block Devices (ID ACPI0006).
5711 This affects internal data structures and code only; there should
5712 be no differences visible externally. One new file has been
5715 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
5716 fields that are used to determine the GPE block lengths. The
5717 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
5718 structures are ignored. This is per the ACPI specification but it
5719 isn't very clear. The full 256 Block 0/1 GPEs are now supported
5720 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
5722 In the SCI interrupt handler, removed the read of the PM1_CONTROL
5723 register to look at the SCI_EN bit. On some machines, this read
5724 causes an SMI event and greatly slows down SCI events. (This may
5725 in fact be the cause of slow battery status response on some
5728 Fixed a problem where a store of a NULL string to a package object
5729 could cause the premature deletion of the object. This was seen
5730 during execution of the battery _BIF method on some systems,
5731 resulting in no battery data being returned.
5733 Added AcpiWalkResources interface to simplify parsing of resource
5736 Code and Data Size: Current core subsystem library sizes are shown
5737 below. These are the code and data sizes for the acpica.lib
5738 produced by the Microsoft Visual C++ 6.0 compiler, and these
5739 values do not include any ACPI driver or OSPM code. The debug
5740 version of the code includes the debug output trace mechanism and
5741 has a much larger code and data size. Note that these values will
5742 vary depending on the efficiency of the compiler and the compiler
5743 options used during generation.
5746 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
5747 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
5749 Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total
5750 Debug Version: 154.0K Code, 63.4K Data, 217.4K Total
5755 S3 fixes (Ole Rohne)
5757 Update ACPI PHP driver with to use new acpi_walk_resource API
5760 Add S4BIOS support (Pavel Machek)
5762 Map in entire table before performing checksum (John Stultz)
5764 Expand the mem= cmdline to allow the specification of reserved and
5765 ACPI DATA blocks (Pavel Machek)
5767 Never use ACPI on VISWS
5769 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
5771 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
5772 causing us to think that some systems support C2 when they really
5775 Do not count processor objects for non-present CPUs (Thanks to
5781 Fixed a problem where ASL include files could not be found and
5784 Added support for the _PDC reserved name.
5787 ----------------------------------------
5788 22 January 2003. Summary of changes for version 20030122.
5791 1) ACPI CA Core Subsystem:
5793 Added a check for constructs of the form: Store (Local0, Local0)
5794 where Local0 is not initialized. Apparently, some BIOS
5795 programmers believe that this is a NOOP. Since this store doesn't
5796 do anything anyway, the new prototype behavior will ignore this
5797 error. This is a case where we can relax the strict checking in
5798 the interpreter in the name of compatibility.
5803 The AcpiSrc Source Conversion Utility has been released with the
5804 Linux package for the first time. This is the utility that is
5805 used to convert the ACPI CA base source code to the Linux version.
5807 (Both) Handle P_BLK lengths shorter than 6 more gracefully
5809 (Both) Move more headers to include/acpi, and delete an unused
5812 (Both) Move drivers/acpi/include directory to include/acpi
5814 (Both) Boot functions don't use cmdline, so don't pass it around
5816 (Both) Remove include of unused header (Adrian Bunk)
5818 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
5820 former now also includes the latter, acpiphp.h only needs the one,
5823 (2.5) Make it possible to select method of bios restoring after S3
5824 resume. [=> no more ugly ifdefs] (Pavel Machek)
5826 (2.5) Make proc write interfaces work (Pavel Machek)
5828 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
5830 (2.5) Break out ACPI Perf code into its own module, under cpufreq
5833 (2.4) S4BIOS support (Ducrot Bruno)
5835 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
5841 Added support to disassemble SSDT and PSDTs.
5843 Implemented support to obtain SSDTs from the Windows registry if
5847 ----------------------------------------
5848 09 January 2003. Summary of changes for version 20030109.
5850 1) ACPI CA Core Subsystem:
5852 Changed the behavior of the internal Buffer-to-String conversion
5853 function. The current ACPI specification states that the contents
5854 of the buffer are "converted to a string of two-character
5855 hexadecimal numbers, each separated by a space". Unfortunately,
5856 this definition is not backwards compatible with existing ACPI 1.0
5857 implementations (although the behavior was not defined in the ACPI
5858 1.0 specification). The new behavior simply copies data from the
5859 buffer to the string until a null character is found or the end of
5860 the buffer is reached. The new String object is always null
5861 terminated. This problem was seen during the generation of _BIF
5862 battery data where incorrect strings were returned for battery
5863 type, etc. This will also require an errata to the ACPI
5866 Renamed all instances of NATIVE_UINT and NATIVE_INT to
5867 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
5869 Copyright in all module headers (both Linux and non-Linux) has be
5872 Code and Data Size: Current core subsystem library sizes are shown
5873 below. These are the code and data sizes for the acpica.lib
5874 produced by the Microsoft Visual C++ 6.0 compiler, and these
5875 values do not include any ACPI driver or OSPM code. The debug
5876 version of the code includes the debug output trace mechanism and
5877 has a much larger code and data size. Note that these values will
5878 vary depending on the efficiency of the compiler and the compiler
5879 options used during generation.
5882 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
5883 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
5885 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
5886 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
5891 Fixed an oops on module insertion/removal (Matthew Tippett)
5893 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
5895 (2.5) Replace pr_debug (Randy Dunlap)
5897 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
5899 (Both) Eliminate spawning of thread from timer callback, in favor
5902 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
5904 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
5906 (Both) Add missing statics to button.c (Pavel Machek)
5908 Several changes have been made to the source code translation
5909 utility that generates the Linux Code in order to make the code
5912 All typedefs on structs and unions have been removed in keeping
5913 with the Linux coding style.
5915 Removed the non-Linux SourceSafe module revision number from each
5918 Completed major overhaul of symbols to be lowercased for linux.
5919 Doubled the number of symbols that are lowercased.
5921 Fixed a problem where identifiers within procedure headers and
5922 within quotes were not fully lower cased (they were left with a
5925 Some C macros whose only purpose is to allow the generation of 16-
5926 bit code are now completely removed in the Linux code, increasing
5927 readability and maintainability.
5929 ----------------------------------------
5931 12 December 2002. Summary of changes for version 20021212.
5934 1) ACPI CA Core Subsystem:
5936 Fixed a problem where the creation of a zero-length AML Buffer
5937 would cause a fault.
5939 Fixed a problem where a Buffer object that pointed to a static AML
5940 buffer (in an ACPI table) could inadvertently be deleted, causing
5943 Fixed a problem where a user buffer (passed in to the external
5944 ACPI CA interfaces) could be overwritten if the buffer was too
5945 small to complete the operation, causing memory corruption.
5947 Fixed a problem in the Buffer-to-String conversion code where a
5948 string of length one was always returned, regardless of the size
5949 of the input Buffer object.
5951 Removed the NATIVE_CHAR data type across the entire source due to
5952 lack of need and lack of consistent use.
5954 Code and Data Size: Current core subsystem library sizes are shown
5955 below. These are the code and data sizes for the acpica.lib
5956 produced by the Microsoft Visual C++ 6.0 compiler, and these
5957 values do not include any ACPI driver or OSPM code. The debug
5958 version of the code includes the debug output trace mechanism and
5959 has a much larger code and data size. Note that these values will
5960 vary depending on the efficiency of the compiler and the compiler
5961 options used during generation.
5964 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
5965 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
5967 Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total
5968 Debug Version: 153.0K Code, 62.9K Data, 215.9K Total
5971 ----------------------------------------
5972 05 December 2002. Summary of changes for version 20021205.
5974 1) ACPI CA Core Subsystem:
5976 Fixed a problem where a store to a String or Buffer object could
5977 cause corruption of the DSDT if the object type being stored was
5978 the same as the target object type and the length of the object
5979 being stored was equal to or smaller than the original (existing)
5980 target object. This was seen to cause corruption of battery _BIF
5981 buffers if the _BIF method modified the buffer on the fly.
5983 Fixed a problem where an internal error was generated if a control
5984 method invocation was used in an OperationRegion, Buffer, or
5985 Package declaration. This was caused by the deferred parsing of
5986 the control method and thus the deferred creation of the internal
5987 method object. The solution to this problem was to create the
5988 internal method object at the moment the method is encountered in
5989 the first pass - so that subsequent references to the method will
5990 able to obtain the required parameter count and thus properly
5991 parse the method invocation. This problem presented itself as an
5992 AE_AML_INTERNAL during the pass 1 parse phase during table load.
5994 Fixed a problem where the internal String object copy routine did
5995 not always allocate sufficient memory for the target String object
5996 and caused memory corruption. This problem was seen to cause
5997 "Allocation already present in list!" errors as memory allocation
6000 Implemented a new function for the evaluation of namespace objects
6001 that allows the specification of the allowable return object
6002 types. This simplifies a lot of code that checks for a return
6003 object of one or more specific objects returned from the
6004 evaluation (such as _STA, etc.) This may become and external
6005 function if it would be useful to ACPI-related drivers.
6007 Completed another round of prefixing #defines with "ACPI_" for
6010 Completed additional code restructuring to allow more modular
6011 linking for iASL compiler and AcpiExec. Several files were split
6012 creating new files. New files: nsparse.c dsinit.c evgpe.c
6014 Implemented an abort mechanism to terminate an executing control
6015 method via the AML debugger. This feature is useful for debugging
6016 control methods that depend (wait) for specific hardware
6019 Code and Data Size: Current core subsystem library sizes are shown
6020 below. These are the code and data sizes for the acpica.lib
6021 produced by the Microsoft Visual C++ 6.0 compiler, and these
6022 values do not include any ACPI driver or OSPM code. The debug
6023 version of the code includes the debug output trace mechanism and
6024 has a much larger code and data size. Note that these values will
6025 vary depending on the efficiency of the compiler and the compiler
6026 options used during generation.
6029 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6030 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6032 Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total
6033 Debug Version: 152.7K Code, 62.7K Data, 215.4K Total
6036 2) iASL Compiler/Disassembler
6038 Fixed a compiler code generation problem for "Interrupt" Resource
6039 Descriptors. If specified in the ASL, the optional "Resource
6040 Source Index" and "Resource Source" fields were not inserted into
6041 the correct location within the AML resource descriptor, creating
6042 an invalid descriptor.
6044 Fixed a disassembler problem for "Interrupt" resource descriptors.
6045 The optional "Resource Source Index" and "Resource Source" fields
6049 ----------------------------------------
6050 22 November 2002. Summary of changes for version 20021122.
6053 1) ACPI CA Core Subsystem:
6055 Fixed a reported problem where an object stored to a Method Local
6056 or Arg was not copied to a new object during the store - the
6057 object pointer was simply copied to the Local/Arg. This caused
6058 all subsequent operations on the Local/Arg to also affect the
6059 original source of the store operation.
6061 Fixed a problem where a store operation to a Method Local or Arg
6062 was not completed properly if the Local/Arg contained a reference
6063 (from RefOf) to a named field. The general-purpose store-to-
6064 namespace-node code is now used so that this case is handled
6067 Fixed a problem where the internal object copy routine would cause
6068 a protection fault if the object being copied was a Package and
6069 contained either 1) a NULL package element or 2) a nested sub-
6072 Fixed a problem with the GPE initialization that resulted from an
6073 ambiguity in the ACPI specification. One section of the
6074 specification states that both the address and length of the GPE
6075 block must be zero if the block is not supported. Another section
6076 implies that only the address need be zero if the block is not
6077 supported. The code has been changed so that both the address and
6078 the length must be non-zero to indicate a valid GPE block (i.e.,
6079 if either the address or the length is zero, the GPE block is
6082 Code and Data Size: Current core subsystem library sizes are shown
6083 below. These are the code and data sizes for the acpica.lib
6084 produced by the Microsoft Visual C++ 6.0 compiler, and these
6085 values do not include any ACPI driver or OSPM code. The debug
6086 version of the code includes the debug output trace mechanism and
6087 has a much larger code and data size. Note that these values will
6088 vary depending on the efficiency of the compiler and the compiler
6089 options used during generation.
6092 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6093 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6095 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6096 Debug Version: 152.9K Code, 63.3K Data, 216.2K Total
6101 Cleaned up EC driver. Exported an external EC read/write
6102 interface. By going through this, other drivers (most notably
6103 sonypi) will be able to serialize access to the EC.
6106 3) iASL Compiler/Disassembler
6108 Implemented support to optionally generate include files for both
6109 ASM and C (the -i switch). This simplifies BIOS development by
6110 automatically creating include files that contain external
6111 declarations for the symbols that are created within the
6113 (optionally generated) ASM and C AML source files.
6116 ----------------------------------------
6117 15 November 2002. Summary of changes for version 20021115.
6119 1) ACPI CA Core Subsystem:
6121 Fixed a memory leak problem where an error during resolution of
6123 method arguments during a method invocation from another method
6124 failed to cleanup properly by deleting all successfully resolved
6127 Fixed a problem where the target of the Index() operator was not
6128 correctly constructed if the source object was a package. This
6129 problem has not been detected because the use of a target operand
6130 with Index() is very rare.
6132 Fixed a problem with the Index() operator where an attempt was
6133 made to delete the operand objects twice.
6135 Fixed a problem where an attempt was made to delete an operand
6136 twice during execution of the CondRefOf() operator if the target
6139 Implemented the first of perhaps several internal create object
6140 functions that create and initialize a specific object type. This
6141 consolidates duplicated code wherever the object is created, thus
6142 shrinking the size of the subsystem.
6144 Implemented improved debug/error messages for errors that occur
6145 during nested method invocations. All executing method pathnames
6146 are displayed (with the error) as the call stack is unwound - thus
6149 Fixed a problem introduced in the 10/02 release that caused
6150 premature deletion of a buffer object if a buffer was used as an
6151 ASL operand where an integer operand is required (Thus causing an
6152 implicit object conversion from Buffer to Integer.) The change in
6153 the 10/02 release was attempting to fix a memory leak (albeit
6156 Code and Data Size: Current core subsystem library sizes are shown
6157 below. These are the code and data sizes for the acpica.lib
6158 produced by the Microsoft Visual C++ 6.0 compiler, and these
6159 values do not include any ACPI driver or OSPM code. The debug
6160 version of the code includes the debug output trace mechanism and
6161 has a much larger code and data size. Note that these values will
6162 vary depending on the efficiency of the compiler and the compiler
6163 options used during generation.
6166 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6167 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6169 Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total
6170 Debug Version: 152.7K Code, 63.2K Data, 215.5K Total
6175 Changed the implementation of the ACPI semaphores to use down()
6176 instead of down_interruptable(). It is important that the
6177 execution of ACPI control methods not be interrupted by signals.
6178 Methods must run to completion, or the system may be left in an
6179 unknown/unstable state.
6181 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
6185 3) iASL Compiler/Disassembler
6188 Changed the default location of output files. All output files
6189 are now placed in the current directory by default instead of in
6190 the directory of the source file. This change may affect some
6191 existing makefiles, but it brings the behavior of the compiler in
6192 line with other similar tools. The location of the output files
6193 can be overridden with the -p command line switch.
6196 ----------------------------------------
6197 11 November 2002. Summary of changes for version 20021111.
6200 0) ACPI Specification 2.0B is released and is now available at:
6201 http://www.acpi.info/index.html
6204 1) ACPI CA Core Subsystem:
6206 Implemented support for the ACPI 2.0 SMBus Operation Regions.
6207 This includes the early detection and handoff of the request to
6208 the SMBus region handler (avoiding all of the complex field
6209 support code), and support for the bidirectional return packet
6210 from an SMBus write operation. This paves the way for the
6211 development of SMBus drivers in each host operating system.
6213 Fixed a problem where the semaphore WAIT_FOREVER constant was
6214 defined as 32 bits, but must be 16 bits according to the ACPI
6215 specification. This had the side effect of causing ASL
6216 Mutex/Event timeouts even though the ASL code requested a wait
6217 forever. Changed all internal references to the ACPI timeout
6218 parameter to 16 bits to prevent future problems. Changed the name
6219 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
6221 Code and Data Size: Current core subsystem library sizes are shown
6222 below. These are the code and data sizes for the acpica.lib
6223 produced by the Microsoft Visual C++ 6.0 compiler, and these
6224 values do not include any ACPI driver or OSPM code. The debug
6225 version of the code includes the debug output trace mechanism and
6226 has a much larger code and data size. Note that these values will
6227 vary depending on the efficiency of the compiler and the compiler
6228 options used during generation.
6231 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6232 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6234 Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total
6235 Debug Version: 153.1K Code, 63.3K Data, 216.4K Total
6240 Module loading/unloading fixes (John Cagle)
6243 3) iASL Compiler/Disassembler
6245 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
6247 Implemented support for the disassembly of all SMBus protocol
6248 keywords (SMBQuick, SMBWord, etc.)
6250 ----------------------------------------
6251 01 November 2002. Summary of changes for version 20021101.
6254 1) ACPI CA Core Subsystem:
6256 Fixed a problem where platforms that have a GPE1 block but no GPE0
6257 block were not handled correctly. This resulted in a "GPE
6258 overlap" error message. GPE0 is no longer required.
6260 Removed code added in the previous release that inserted nodes
6261 into the namespace in alphabetical order. This caused some side-
6262 effects on various machines. The root cause of the problem is
6263 still under investigation since in theory, the internal ordering
6264 of the namespace nodes should not matter.
6267 Enhanced error reporting for the case where a named object is not
6268 found during control method execution. The full ACPI namepath
6269 (name reference) of the object that was not found is displayed in
6272 Note: as a result of the overhaul of the namespace object types in
6273 the previous release, the namespace nodes for the predefined
6274 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
6275 instead of ACPI_TYPE_ANY. This simplifies the namespace
6276 management code but may affect code that walks the namespace tree
6277 looking for specific object types.
6279 Code and Data Size: Current core subsystem library sizes are shown
6280 below. These are the code and data sizes for the acpica.lib
6281 produced by the Microsoft Visual C++ 6.0 compiler, and these
6282 values do not include any ACPI driver or OSPM code. The debug
6283 version of the code includes the debug output trace mechanism and
6284 has a much larger code and data size. Note that these values will
6285 vary depending on the efficiency of the compiler and the compiler
6286 options used during generation.
6289 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
6290 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
6292 Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total
6293 Debug Version: 152.3K Code, 63.0K Data, 215.3K Total
6298 Fixed a problem introduced in the previous release where the
6299 Processor and Thermal objects were not recognized and installed in
6300 /proc. This was related to the scope type change described above.
6303 3) iASL Compiler/Disassembler
6305 Implemented the -g option to get all of the required ACPI tables
6306 from the registry and save them to files (Windows version of the
6307 compiler only.) The required tables are the FADT, FACS, and DSDT.
6309 Added ACPI table checksum validation during table disassembly in
6310 order to catch corrupted tables.
6313 ----------------------------------------
6314 22 October 2002. Summary of changes for version 20021022.
6316 1) ACPI CA Core Subsystem:
6318 Implemented a restriction on the Scope operator that the target
6319 must already exist in the namespace at the time the operator is
6320 encountered (during table load or method execution). In other
6321 words, forward references are not allowed and Scope() cannot
6322 create a new object. This changes the previous behavior where the
6323 interpreter would create the name if not found. This new behavior
6324 correctly enables the search-to-root algorithm during namespace
6325 lookup of the target name. Because of this upsearch, this fixes
6326 the known Compaq _SB_.OKEC problem and makes both the AML
6327 interpreter and iASL compiler compatible with other ACPI
6330 Completed a major overhaul of the internal ACPI object types for
6331 the ACPI Namespace and the associated operand objects. Many of
6332 these types had become obsolete with the introduction of the two-
6333 pass namespace load. This cleanup simplifies the code and makes
6334 the entire namespace load mechanism much clearer and easier to
6337 Improved debug output for tracking scope opening/closing to help
6338 diagnose scoping issues. The old scope name as well as the new
6339 scope name are displayed. Also improved error messages for
6340 problems with ASL Mutex objects and error messages for GPE
6343 Cleaned up the namespace dump code, removed obsolete code.
6345 All string output (for all namespace/object dumps) now uses the
6346 common ACPI string output procedure which handles escapes properly
6347 and does not emit non-printable characters.
6349 Fixed some issues with constants in the 64-bit version of the
6350 local C library (utclib.c)
6355 EC Driver: No longer attempts to acquire the Global Lock at
6359 3) iASL Compiler/Disassembler
6361 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
6362 2 opcodes outside of a control method. This means that the
6363 "executable" operators (versus the "namespace" operators) cannot
6364 be used at the table level; they can only be used within a control
6367 Implemented the restriction on the Scope() operator where the
6368 target must already exist in the namespace at the time the
6369 operator is encountered (during ASL compilation). In other words,
6370 forward references are not allowed and Scope() cannot create a new
6371 object. This makes the iASL compiler compatible with other ACPI
6372 implementations and makes the Scope() implementation adhere to the
6375 Fixed a problem where namepath optimization for the Alias operator
6376 was optimizing the wrong path (of the two namepaths.) This caused
6377 a "Missing alias link" error message.
6379 Fixed a problem where an "unknown reserved name" warning could be
6380 incorrectly generated for names like "_SB" when the trailing
6381 underscore is not used in the original ASL.
6383 Fixed a problem where the reserved name check did not handle
6384 NamePaths with multiple NameSegs correctly. The first nameseg of
6385 the NamePath was examined instead of the last NameSeg.
6388 ----------------------------------------
6390 02 October 2002. Summary of changes for this release.
6393 1) ACPI CA Core Subsystem version 20021002:
6395 Fixed a problem where a store/copy of a string to an existing
6396 string did not always set the string length properly in the String
6399 Fixed a reported problem with the ToString operator where the
6400 behavior was identical to the ToHexString operator instead of just
6401 simply converting a raw buffer to a string data type.
6403 Fixed a problem where CopyObject and the other "explicit"
6404 conversion operators were not updating the internal namespace node
6405 type as part of the store operation.
6407 Fixed a memory leak during implicit source operand conversion
6408 where the original object was not deleted if it was converted to a
6409 new object of a different type.
6411 Enhanced error messages for all problems associated with namespace
6412 lookups. Common procedure generates and prints the lookup name as
6413 well as the formatted status.
6415 Completed implementation of a new design for the Alias support
6416 within the namespace. The existing design did not handle the case
6417 where a new object was assigned to one of the two names due to the
6418 use of an explicit conversion operator, resulting in the two names
6419 pointing to two different objects. The new design simply points
6420 the Alias name to the original name node - not to the object.
6421 This results in a level of indirection that must be handled in the
6422 name resolution mechanism.
6424 Code and Data Size: Current core subsystem library sizes are shown
6425 below. These are the code and data sizes for the acpica.lib
6426 produced by the Microsoft Visual C++ 6.0 compiler, and these
6427 values do not include any ACPI driver or OSPM code. The debug
6428 version of the code includes the debug output trace mechanism and
6429 has a larger code and data size. Note that these values will vary
6430 depending on the efficiency of the compiler and the compiler
6431 options used during generation.
6434 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
6435 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
6437 Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total
6438 Debug Version: 151.7K Code, 62.4K Data, 214.1K Total
6443 Initialize thermal driver's timer before it is used. (Knut
6446 Allow handling negative celsius values. (Kochi Takayoshi)
6448 Fix thermal management and make trip points. R/W (Pavel Machek)
6450 Fix /proc/acpi/sleep. (P. Christeas)
6452 IA64 fixes. (David Mosberger)
6454 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
6456 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
6460 3) iASL Compiler/Disassembler
6462 Clarified some warning/error messages.
6465 ----------------------------------------
6466 18 September 2002. Summary of changes for this release.
6469 1) ACPI CA Core Subsystem version 20020918:
6471 Fixed a reported problem with reference chaining (via the Index()
6472 and RefOf() operators) in the ObjectType() and SizeOf() operators.
6473 The definition of these operators includes the dereferencing of
6474 all chained references to return information on the base object.
6476 Fixed a problem with stores to indexed package elements - the
6477 existing code would not complete the store if an "implicit
6478 conversion" was not performed. In other words, if the existing
6479 object (package element) was to be replaced completely, the code
6480 didn't handle this case.
6482 Relaxed typechecking on the ASL "Scope" operator to allow the
6483 target name to refer to an object of type Integer, String, or
6484 Buffer, in addition to the scoping object types (Device,
6485 predefined Scopes, Processor, PowerResource, and ThermalZone.)
6486 This allows existing AML code that has workarounds for a bug in
6487 Windows to function properly. A warning is issued, however. This
6488 affects both the AML interpreter and the iASL compiler. Below is
6489 an example of this type of ASL code:
6495 Fixed some reported problems with 64-bit integer support in the
6496 local implementation of C library functions (clib.c)
6501 Use ACPI fix map region instead of IOAPIC region, since it is
6502 undefined in non-SMP.
6504 Ensure that the SCI has the proper polarity and trigger, even on
6505 systems that do not have an interrupt override entry in the MADT.
6507 2.5 big driver reorganization (Pat Mochel)
6509 Use early table mapping code from acpitable.c (Andi Kleen)
6511 New blacklist entries (Andi Kleen)
6513 Blacklist improvements. Split blacklist code out into a separate
6514 file. Move checking the blacklist to very early. Previously, we
6515 would use ACPI tables, and then halfway through init, check the
6516 blacklist -- too late. Now, it's early enough to completely fall-
6520 3) iASL Compiler/Disassembler version 20020918:
6522 Fixed a problem where the typechecking code didn't know that an
6523 alias could point to a method. In other words, aliases were not
6524 being dereferenced during typechecking.
6527 ----------------------------------------
6528 29 August 2002. Summary of changes for this release.
6530 1) ACPI CA Core Subsystem Version 20020829:
6532 If the target of a Scope() operator already exists, it must be an
6533 object type that actually opens a scope -- such as a Device,
6534 Method, Scope, etc. This is a fatal runtime error. Similar error
6535 check has been added to the iASL compiler also.
6537 Tightened up the namespace load to disallow multiple names in the
6538 same scope. This previously was allowed if both objects were of
6539 the same type. (i.e., a lookup was the same as entering a new
6545 Ensure that the ACPI interrupt has the proper trigger and
6548 local_irq_disable is extraneous. (Matthew Wilcox)
6550 Make "acpi=off" actually do what it says, and not use the ACPI
6551 interpreter *or* the tables.
6553 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
6557 3) iASL Compiler/Disassembler Version 20020829:
6559 Implemented namepath optimization for name declarations. For
6560 example, a declaration like "Method (\_SB_.ABCD)" would get
6561 optimized to "Method (ABCD)" if the declaration is within the
6562 \_SB_ scope. This optimization is in addition to the named
6563 reference path optimization first released in the previous
6564 version. This would seem to complete all possible optimizations
6565 for namepaths within the ASL/AML.
6567 If the target of a Scope() operator already exists, it must be an
6568 object type that actually opens a scope -- such as a Device,
6571 Implemented a check and warning for unreachable code in the same
6572 block below a Return() statement.
6574 Fixed a problem where the listing file was not generated if the
6575 compiler aborted if the maximum error count was exceeded (200).
6577 Fixed a problem where the typechecking of method return values was
6578 broken. This includes the check for a return value when the
6579 method is invoked as a TermArg (a return value is expected.)
6581 Fixed a reported problem where EOF conditions during a quoted
6582 string or comment caused a fault.
6585 ----------------------------------------
6586 15 August 2002. Summary of changes for this release.
6588 1) ACPI CA Core Subsystem Version 20020815:
6590 Fixed a reported problem where a Store to a method argument that
6591 contains a reference did not perform the indirect store correctly.
6592 This problem was created during the conversion to the new
6593 reference object model - the indirect store to a method argument
6594 code was not updated to reflect the new model.
6596 Reworked the ACPI mode change code to better conform to ACPI 2.0,
6597 handle corner cases, and improve code legibility (Kochi Takayoshi)
6599 Fixed a problem with the pathname parsing for the carat (^)
6600 prefix. The heavy use of the carat operator by the new namepath
6601 optimization in the iASL compiler uncovered a problem with the AML
6602 interpreter handling of this prefix. In the case where one or
6603 more carats precede a single nameseg, the nameseg was treated as
6604 standalone and the search rule (to root) was inadvertently
6605 applied. This could cause both the iASL compiler and the
6606 interpreter to find the wrong object or to miss the error that
6607 should occur if the object does not exist at that exact pathname.
6609 Found and fixed the problem where the HP Pavilion DSDT would not
6610 load. This was a relatively minor tweak to the table loading code
6611 (a problem caused by the unexpected encounter with a method
6612 invocation not within a control method), but it does not solve the
6613 overall issue of the execution of AML code at the table level.
6614 This investigation is still ongoing.
6616 Code and Data Size: Current core subsystem library sizes are shown
6617 below. These are the code and data sizes for the acpica.lib
6618 produced by the Microsoft Visual C++ 6.0 compiler, and these
6619 values do not include any ACPI driver or OSPM code. The debug
6620 version of the code includes the debug output trace mechanism and
6621 has a larger code and data size. Note that these values will vary
6622 depending on the efficiency of the compiler and the compiler
6623 options used during generation.
6626 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
6627 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
6629 Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total
6630 Debug Version: 150.0K Code, 61.7K Data, 211.7K Total
6635 Remove redundant slab.h include (Brad Hards)
6637 Fix several bugs in thermal.c (Herbert Nachtnebel)
6639 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
6641 Change acpi_system_suspend to use updated irq functions (Pavel
6644 Export acpi_get_firmware_table (Matthew Wilcox)
6646 Use proper root proc entry for ACPI (Kochi Takayoshi)
6648 Fix early-boot table parsing (Bjorn Helgaas)
6651 3) iASL Compiler/Disassembler
6653 Reworked the compiler options to make them more consistent and to
6654 use two-letter options where appropriate. We were running out of
6655 sensible letters. This may break some makefiles, so check the
6656 current options list by invoking the compiler with no parameters.
6658 Completed the design and implementation of the ASL namepath
6659 optimization option for the compiler. This option optimizes all
6660 references to named objects to the shortest possible path. The
6661 first attempt tries to utilize a single nameseg (4 characters) and
6662 the "search-to-root" algorithm used by the interpreter. If that
6663 cannot be used (because either the name is not in the search path
6664 or there is a conflict with another object with the same name),
6665 the pathname is optimized using the carat prefix (usually a
6666 shorter string than specifying the entire path from the root.)
6668 Implemented support to obtain the DSDT from the Windows registry
6669 (when the disassembly option is specified with no input file).
6670 Added this code as the implementation for AcpiOsTableOverride in
6671 the Windows OSL. Migrated the 16-bit code (used in the AcpiDump
6672 utility) to scan memory for the DSDT to the AcpiOsTableOverride
6673 function in the DOS OSL to make the disassembler truly OS
6676 Implemented a new option to disassemble and compile in one step.
6677 When used without an input filename, this option will grab the
6678 DSDT from the local machine, disassemble it, and compile it in one
6681 Added a warning message for invalid escapes (a backslash followed
6682 by any character other than the allowable escapes). This catches
6683 the quoted string error "\_SB_" (which should be "\\_SB_" ).
6685 Also, there are numerous instances in the ACPI specification where
6688 Added a compiler option to disable all optimizations. This is
6689 basically the "compatibility mode" because by using this option,
6690 the AML code will come out exactly the same as other ASL
6693 Added error messages for incorrectly ordered dependent resource
6694 functions. This includes: missing EndDependentFn macro at end of
6695 dependent resource list, nested dependent function macros (both
6696 start and end), and missing StartDependentFn macro. These are
6697 common errors that should be caught at compile time.
6699 Implemented _OSI support for the disassembler and compiler. _OSI
6700 must be included in the namespace for proper disassembly (because
6701 the disassembler must know the number of arguments.)
6703 Added an "optimization" message type that is optional (off by
6704 default). This message is used for all optimizations - including
6705 constant folding, integer optimization, and namepath optimization.
6707 ----------------------------------------
6708 25 July 2002. Summary of changes for this release.
6711 1) ACPI CA Core Subsystem Version 20020725:
6713 The AML Disassembler has been enhanced to produce compilable ASL
6714 code and has been integrated into the iASL compiler (see below) as
6715 well as the single-step disassembly for the AML debugger and the
6716 disassembler for the AcpiDump utility. All ACPI 2.0A opcodes,
6717 resource templates and macros are fully supported. The
6718 disassembler has been tested on over 30 different AML files,
6719 producing identical AML when the resulting disassembled ASL file
6720 is recompiled with the same ASL compiler.
6722 Modified the Resource Manager to allow zero interrupts and zero
6723 dma channels during the GetCurrentResources call. This was
6724 causing problems on some platforms.
6726 Added the AcpiOsRedirectOutput interface to the OSL to simplify
6727 output redirection for the AcpiOsPrintf and AcpiOsVprintf
6730 Code and Data Size: Current core subsystem library sizes are shown
6731 below. These are the code and data sizes for the acpica.lib
6732 produced by the Microsoft Visual C++ 6.0 compiler, and these
6733 values do not include any ACPI driver or OSPM code. The debug
6734 version of the code includes the debug output trace mechanism and
6735 has a larger code and data size. Note that these values will vary
6736 depending on the efficiency of the compiler and the compiler
6737 options used during generation.
6740 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
6741 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
6743 Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total
6744 Debug Version: 149.4K Code, 61.6K Data, 211.0K Total
6749 Fixed a panic in the EC driver (Dominik Brodowski)
6751 Implemented checksum of the R/XSDT itself during Linux table scan
6757 The AML disassembler is integrated into the compiler. The "-d"
6758 option invokes the disassembler to completely disassemble an
6759 input AML file, producing as output a text ASL file with the
6760 extension ".dsl" (to avoid name collisions with existing .asl
6761 source files.) A future enhancement will allow the disassembler
6762 to obtain the BIOS DSDT from the registry under Windows.
6764 Fixed a problem with the VendorShort and VendorLong resource
6765 descriptors where an invalid AML sequence was created.
6767 Implemented a fix for BufferData term in the ASL parser. It was
6768 inadvertently defined twice, allowing invalid syntax to pass and
6769 causing reduction conflicts.
6771 Fixed a problem where the Ones opcode could get converted to a
6772 value of zero if "Ones" was used where a byte, word or dword value
6773 was expected. The 64-bit value is now truncated to the correct
6774 size with the correct value.
6778 ----------------------------------------
6779 02 July 2002. Summary of changes for this release.
6782 1) ACPI CA Core Subsystem Version 20020702:
6784 The Table Manager code has been restructured to add several new
6785 features. Tables that are not required by the core subsystem
6786 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
6787 validated in any way and are returned from AcpiGetFirmwareTable if
6788 requested. The AcpiOsTableOverride interface is now called for
6789 each table that is loaded by the subsystem in order to allow the
6790 host to override any table it chooses. Previously, only the DSDT
6791 could be overridden. Added one new files, tbrsdt.c and
6794 Fixed a problem with the conversion of internal package objects to
6795 external objects (when a package is returned from a control
6796 method.) The return buffer length was set to zero instead of the
6797 proper length of the package object.
6799 Fixed a reported problem with the use of the RefOf and DeRefOf
6800 operators when passing reference arguments to control methods. A
6801 new type of Reference object is used internally for references
6802 produced by the RefOf operator.
6804 Added additional error messages in the Resource Manager to explain
6805 AE_BAD_DATA errors when they occur during resource parsing.
6807 Split the AcpiEnableSubsystem into two primitives to enable a
6808 finer granularity initialization sequence. These two calls should
6809 be called in this order: AcpiEnableSubsystem (flags),
6810 AcpiInitializeObjects (flags). The flags parameter remains the
6816 Updated the ACPI utilities module to understand the new style of
6817 fully resolved package objects that are now returned from the core
6818 subsystem. This eliminates errors of the form:
6820 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
6821 acpi_utils-0430 [145] acpi_evaluate_reference:
6822 Invalid element in package (not a device reference)
6824 The method evaluation utility uses the new buffer allocation
6825 scheme instead of calling AcpiEvaluate Object twice.
6827 Added support for ECDT. This allows the use of the Embedded
6829 Controller before the namespace has been fully initialized, which
6830 is necessary for ACPI 2.0 support, and for some laptops to
6831 initialize properly. (Laptops using ECDT are still rare, so only
6832 limited testing was performed of the added functionality.)
6834 Fixed memory leaks in the EC driver.
6836 Eliminated a brittle code structure in acpi_bus_init().
6838 Eliminated the acpi_evaluate() helper function in utils.c. It is
6839 no longer needed since acpi_evaluate_object can optionally
6840 allocate memory for the return object.
6842 Implemented fix for keyboard hang when getting battery readings on
6843 some systems (Stephen White)
6845 PCI IRQ routing update (Dominik Brodowski)
6847 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
6850 ----------------------------------------
6851 11 June 2002. Summary of changes for this release.
6854 1) ACPI CA Core Subsystem Version 20020611:
6856 Fixed a reported problem where constants such as Zero and One
6857 appearing within _PRT packages were not handled correctly within
6858 the resource manager code. Originally reported against the ASL
6859 compiler because the code generator now optimizes integers to
6860 their minimal AML representation (i.e. AML constants if possible.)
6861 The _PRT code now handles all AML constant opcodes correctly
6862 (Zero, One, Ones, Revision).
6864 Fixed a problem with the Concatenate operator in the AML
6865 interpreter where a buffer result object was incorrectly marked as
6866 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
6868 All package sub-objects are now fully resolved before they are
6869 returned from the external ACPI interfaces. This means that name
6870 strings are resolved to object handles, and constant operators
6871 (Zero, One, Ones, Revision) are resolved to Integers.
6873 Implemented immediate resolution of the AML Constant opcodes
6874 (Zero, One, Ones, Revision) to Integer objects upon detection
6875 within the AML stream. This has simplified and reduced the
6876 generated code size of the subsystem by eliminating about 10
6877 switch statements for these constants (which previously were
6878 contained in Reference objects.) The complicating issues are that
6879 the Zero opcode is used as a "placeholder" for unspecified
6880 optional target operands and stores to constants are defined to be
6883 Code and Data Size: Current core subsystem library sizes are shown
6884 below. These are the code and data sizes for the acpica.lib
6885 produced by the Microsoft Visual C++ 6.0 compiler, and these
6886 values do not include any ACPI driver or OSPM code. The debug
6887 version of the code includes the debug output trace mechanism and
6888 has a larger code and data size. Note that these values will vary
6889 depending on the efficiency of the compiler and the compiler
6890 options used during generation.
6893 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
6894 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
6896 Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total
6897 Debug Version: 142.9K Code, 58.7K Data, 201.6K Total
6903 Added preliminary support for obtaining _TRA data for PCI root
6904 bridges (Bjorn Helgaas).
6907 3) iASL Compiler Version X2046:
6909 Fixed a problem where the "_DDN" reserved name was defined to be a
6910 control method with one argument. There are no arguments, and
6911 _DDN does not have to be a control method.
6913 Fixed a problem with the Linux version of the compiler where the
6914 source lines printed with error messages were the wrong lines.
6915 This turned out to be the "LF versus CR/LF" difference between
6916 Windows and Unix. This appears to be the longstanding issue
6917 concerning listing output and error messages.
6919 Fixed a problem with the Linux version of compiler where opcode
6920 names within error messages were wrong. This was caused by a
6921 slight difference in the output of the Flex tool on Linux versus
6924 Fixed a problem with the Linux compiler where the hex output files
6925 contained some garbage data caused by an internal buffer overrun.
6928 ----------------------------------------
6929 17 May 2002. Summary of changes for this release.
6932 1) ACPI CA Core Subsystem Version 20020517:
6934 Implemented a workaround to an BIOS bug discovered on the HP
6935 OmniBook where the FADT revision number and the table size are
6936 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The new
6937 behavior is to fallback to using only the ACPI 1.0 fields of the
6938 FADT if the table is too small to be a ACPI 2.0 table as claimed
6939 by the revision number. Although this is a BIOS bug, this is a
6940 case where the workaround is simple enough and with no side
6941 effects, so it seemed prudent to add it. A warning message is
6944 Implemented minimum size checks for the fixed-length ACPI tables -
6945 - the FADT and FACS, as well as consistency checks between the
6946 revision number and the table size.
6948 Fixed a reported problem in the table override support where the
6949 new table pointer was incorrectly treated as a physical address
6950 instead of a logical address.
6952 Eliminated the use of the AE_AML_ERROR exception and replaced it
6953 with more descriptive codes.
6955 Fixed a problem where an exception would occur if an ASL Field was
6956 defined with no named Field Units underneath it (used by some
6959 Code and Data Size: Current core subsystem library sizes are shown
6960 below. These are the code and data sizes for the acpica.lib
6961 produced by the Microsoft Visual C++ 6.0 compiler, and these
6962 values do not include any ACPI driver or OSPM code. The debug
6963 version of the code includes the debug output trace mechanism and
6964 has a larger code and data size. Note that these values will vary
6965 depending on the efficiency of the compiler and the compiler
6966 options used during generation.
6969 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
6970 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
6972 Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total
6973 Debug Version: 143.8K Code, 58.8K Data, 202.6K Total
6979 Much work done on ACPI init (MADT and PCI IRQ routing support).
6980 (Paul D. and Dominik Brodowski)
6982 Fix PCI IRQ-related panic on boot (Sam Revitch)
6984 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
6986 Fix "MHz" typo (Dominik Brodowski)
6988 Fix RTC year 2000 issue (Dominik Brodowski)
6990 Preclude multiple button proc entries (Eric Brunet)
6992 Moved arch-specific code out of include/platform/aclinux.h
6994 3) iASL Compiler Version X2044:
6996 Implemented error checking for the string used in the EISAID macro
6997 (Usually used in the definition of the _HID object.) The code now
6998 strictly enforces the PnP format - exactly 7 characters, 3
6999 uppercase letters and 4 hex digits.
7001 If a raw string is used in the definition of the _HID object
7002 (instead of the EISAID macro), the string must contain all
7003 alphanumeric characters (e.g., "*PNP0011" is not allowed because
7006 Implemented checking for invalid use of ACPI reserved names for
7007 most of the name creation operators (Name, Device, Event, Mutex,
7008 OperationRegion, PowerResource, Processor, and ThermalZone.)
7009 Previously, this check was only performed for control methods.
7011 Implemented an additional check on the Name operator to emit an
7012 error if a reserved name that must be implemented in ASL as a
7013 control method is used. We know that a reserved name must be a
7014 method if it is defined with input arguments.
7016 The warning emitted when a namespace object reference is not found
7017 during the cross reference phase has been changed into an error.
7018 The "External" directive should be used for names defined in other
7022 4) Tools and Utilities
7024 The 16-bit tools (adump16 and aexec16) have been regenerated and
7027 Fixed a problem with the output of both acpidump and adump16 where
7028 the indentation of closing parentheses and brackets was not
7030 aligned properly with the parent block.
7033 ----------------------------------------
7034 03 May 2002. Summary of changes for this release.
7037 1) ACPI CA Core Subsystem Version 20020503:
7039 Added support a new OSL interface that allows the host operating
7041 system software to override the DSDT found in the firmware -
7042 AcpiOsTableOverride. With this interface, the OSL can examine the
7043 version of the firmware DSDT and replace it with a different one
7046 Added new external interfaces for accessing ACPI registers from
7047 device drivers and other system software - AcpiGetRegister and
7048 AcpiSetRegister. This was simply an externalization of the
7049 existing AcpiHwBitRegister interfaces.
7051 Fixed a regression introduced in the previous build where the
7052 ASL/AML CreateField operator always returned an error,
7053 "destination must be a NS Node".
7055 Extended the maximum time (before failure) to successfully enable
7056 ACPI mode to 3 seconds.
7058 Code and Data Size: Current core subsystem library sizes are shown
7059 below. These are the code and data sizes for the acpica.lib
7060 produced by the Microsoft Visual C++ 6.0 compiler, and these
7061 values do not include any ACPI driver or OSPM code. The debug
7062 version of the code includes the debug output trace mechanism and
7063 has a larger code and data size. Note that these values will vary
7064 depending on the efficiency of the compiler and the compiler
7065 options used during generation.
7068 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7069 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7071 Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total
7072 Debug Version: 142.9K Code, 58.4K Data, 201.3K Total
7077 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
7078 free. While 3 out of 4 of our in-house systems work fine, the last
7079 one still hangs when testing the LAPIC timer.
7081 Renamed many files in 2.5 kernel release to omit "acpi_" from the
7084 Added warning on boot for Presario 711FR.
7086 Sleep improvements (Pavel Machek)
7088 ACPI can now be built without CONFIG_PCI enabled.
7090 IA64: Fixed memory map functions (JI Lee)
7093 3) iASL Compiler Version X2043:
7095 Added support to allow the compiler to be integrated into the MS
7096 VC++ development environment for one-button compilation of single
7097 files or entire projects -- with error-to-source-line mapping.
7099 Implemented support for compile-time constant folding for the
7100 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
7101 specification. This allows the ASL writer to use expressions
7102 instead of Integer/Buffer/String constants in terms that must
7103 evaluate to constants at compile time and will also simplify the
7104 emitted AML in any such sub-expressions that can be folded
7105 (evaluated at compile-time.) This increases the size of the
7106 compiler significantly because a portion of the ACPI CA AML
7107 interpreter is included within the compiler in order to pre-
7108 evaluate constant expressions.
7111 Fixed a problem with the "Unicode" ASL macro that caused the
7112 compiler to fault. (This macro is used in conjunction with the
7113 _STR reserved name.)
7115 Implemented an AML opcode optimization to use the Zero, One, and
7116 Ones opcodes where possible to further reduce the size of integer
7117 constants and thus reduce the overall size of the generated AML
7120 Implemented error checking for new reserved terms for ACPI version
7123 Implemented the -qr option to display the current list of ACPI
7124 reserved names known to the compiler.
7126 Implemented the -qc option to display the current list of ASL
7127 operators that are allowed within constant expressions and can
7128 therefore be folded at compile time if the operands are constants.
7133 Updated the Programmer's Reference for new interfaces, data types,
7134 and memory allocation model options.
7136 Updated the iASL Compiler User Reference to apply new format and
7137 add information about new features and options.
7139 ----------------------------------------
7140 19 April 2002. Summary of changes for this release.
7142 1) ACPI CA Core Subsystem Version 20020419:
7144 The source code base for the Core Subsystem has been completely
7145 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
7146 versions. The Lint option files used are included in the
7147 /acpi/generate/lint directory.
7149 Implemented enhanced status/error checking across the entire
7150 Hardware manager subsystem. Any hardware errors (reported from
7151 the OSL) are now bubbled up and will abort a running control
7155 Fixed a problem where the per-ACPI-table integer width (32 or 64)
7156 was stored only with control method nodes, causing a fault when
7157 non-control method code was executed during table loading. The
7158 solution implemented uses a global variable to indicate table
7159 width across the entire ACPI subsystem. Therefore, ACPI CA does
7160 not support mixed integer widths across different ACPI tables
7163 Fixed a problem where NULL extended fields (X fields) in an ACPI
7164 2.0 ACPI FADT caused the table load to fail. Although the
7165 existing ACPI specification is a bit fuzzy on this topic, the new
7166 behavior is to fall back on a ACPI 1.0 field if the corresponding
7167 ACPI 2.0 X field is zero (even though the table revision indicates
7168 a full ACPI 2.0 table.) The ACPI specification will be updated to
7171 Fixed a problem with the SystemMemory operation region handler
7172 where memory was always accessed byte-wise even if the AML-
7173 specified access width was larger than a byte. This caused
7174 problems on systems with memory-mapped I/O. Memory is now
7175 accessed with the width specified. On systems that do not support
7176 non-aligned transfers, a check is made to guarantee proper address
7177 alignment before proceeding in order to avoid an AML-caused
7178 alignment fault within the kernel.
7181 Fixed a problem with the ExtendedIrq resource where only one byte
7182 of the 4-byte Irq field was extracted.
7184 Fixed the AcpiExDigitsNeeded() procedure to support _UID. This
7185 function was out of date and required a rewrite.
7187 Code and Data Size: Current core subsystem library sizes are shown
7188 below. These are the code and data sizes for the acpica.lib
7189 produced by the Microsoft Visual C++ 6.0 compiler, and these
7190 values do not include any ACPI driver or OSPM code. The debug
7191 version of the code includes the debug output trace mechanism and
7192 has a larger code and data size. Note that these values will vary
7193 depending on the efficiency of the compiler and the compiler
7194 options used during generation.
7197 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7198 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7200 Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total
7201 Debug Version: 142.4K Code, 58.3K Data, 200.7K Total
7206 PCI IRQ routing fixes (Dominik Brodowski)
7209 3) iASL Compiler Version X2042:
7211 Implemented an additional compile-time error check for a field
7212 unit whose size + minimum access width would cause a run-time
7213 access beyond the end-of-region. Previously, only the field size
7216 The Core subsystem and iASL compiler now share a common parse
7217 object in preparation for compile-time evaluation of the type
7218 3/4/5 ASL operators.
7221 ----------------------------------------
7222 Summary of changes for this release: 03_29_02
7224 1) ACPI CA Core Subsystem Version 20020329:
7226 Implemented support for late evaluation of TermArg operands to
7227 Buffer and Package objects. This allows complex expressions to be
7228 used in the declarations of these object types.
7230 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
7231 1.0, if the field was larger than 32 bits, it was returned as a
7232 buffer - otherwise it was returned as an integer. In ACPI 2.0,
7233 the field is returned as a buffer only if the field is larger than
7234 64 bits. The TableRevision is now considered when making this
7235 conversion to avoid incompatibility with existing ASL code.
7237 Implemented logical addressing for AcpiOsGetRootPointer. This
7238 allows an RSDP with either a logical or physical address. With
7239 this support, the host OS can now override all ACPI tables with
7240 one logical RSDP. Includes implementation of "typed" pointer
7241 support to allow a common data type for both physical and logical
7242 pointers internally. This required a change to the
7243 AcpiOsGetRootPointer interface.
7245 Implemented the use of ACPI 2.0 Generic Address Structures for all
7246 GPE, Fixed Event, and PM Timer I/O. This allows the use of memory
7247 mapped I/O for these ACPI features.
7249 Initialization now ignores not only non-required tables (All
7250 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
7251 not validate the table headers of unrecognized tables.
7253 Fixed a problem where a notify handler could only be
7254 installed/removed on an object of type Device. All "notify"
7256 objects are now supported -- Devices, Processor, Power, and
7259 Removed most verbosity from the ACPI_DB_INFO debug level. Only
7260 critical information is returned when this debug level is enabled.
7262 Code and Data Size: Current core subsystem library sizes are shown
7263 below. These are the code and data sizes for the acpica.lib
7264 produced by the Microsoft Visual C++ 6.0 compiler, and these
7265 values do not include any ACPI driver or OSPM code. The debug
7266 version of the code includes the debug output trace mechanism and
7267 has a larger code and data size. Note that these values will vary
7268 depending on the efficiency of the compiler and the compiler
7269 options used during generation.
7272 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
7273 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
7275 Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total
7276 Debug Version: 139.8K Code, 57.4K Data, 197.2K Total
7281 The processor driver (acpi_processor.c) now fully supports ACPI
7282 2.0-based processor performance control (e.g. Intel(R)
7283 SpeedStep(TM) technology) Note that older laptops that only have
7284 the Intel "applet" interface are not supported through this. The
7285 'limit' and 'performance' interface (/proc) are fully functional.
7286 [Note that basic policy for controlling performance state
7287 transitions will be included in the next version of ospmd.] The
7288 idle handler was modified to more aggressively use C2, and PIIX4
7289 errata handling underwent a complete overhaul (big thanks to
7292 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
7293 based devices in the ACPI namespace are now dynamically bound
7294 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
7295 This allows, among other things, ACPI to resolve bus numbers for
7296 subordinate PCI bridges.
7298 Enhanced PCI IRQ routing to get the proper bus number for _PRT
7299 entries defined underneath PCI bridges.
7301 Added IBM 600E to bad bios list due to invalid _ADR value for
7302 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
7304 In the process of adding full MADT support (e.g. IOAPIC) for IA32
7305 (acpi.c, mpparse.c) -- stay tuned.
7307 Added back visual differentiation between fixed-feature and
7308 control-method buttons in dmesg. Buttons are also subtyped (e.g.
7309 button/power/PWRF) to simplify button identification.
7311 We no longer use -Wno-unused when compiling debug. Please ignore
7312 any "_THIS_MODULE defined but not used" messages.
7314 Can now shut down the system using "magic sysrq" key.
7317 3) iASL Compiler version 2041:
7319 Fixed a problem where conversion errors for hex/octal/decimal
7320 constants were not reported.
7322 Implemented a fix for the General Register template Address field.
7323 This field was 8 bits when it should be 64.
7325 Fixed a problem where errors/warnings were no longer being emitted
7326 within the listing output file.
7328 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
7329 exactly 4 characters, alphanumeric only.
7334 ----------------------------------------
7335 Summary of changes for this release: 03_08_02
7338 1) ACPI CA Core Subsystem Version 20020308:
7340 Fixed a problem with AML Fields where the use of the "AccessAny"
7341 keyword could cause an interpreter error due to attempting to read
7342 or write beyond the end of the parent Operation Region.
7344 Fixed a problem in the SystemMemory Operation Region handler where
7345 an attempt was made to map memory beyond the end of the region.
7346 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
7347 errors on some Linux systems.
7349 Fixed a problem where the interpreter/namespace "search to root"
7350 algorithm was not functioning for some object types. Relaxed the
7351 internal restriction on the search to allow upsearches for all
7352 external object types as well as most internal types.
7357 We now use safe_halt() macro versus individual calls to sti | hlt.
7359 Writing to the processor limit interface should now work. "echo 1"
7360 will increase the limit, 2 will decrease, and 0 will reset to the
7367 Fixed segfault on Linux version.
7370 ----------------------------------------
7371 Summary of changes for this release: 02_25_02
7373 1) ACPI CA Core Subsystem:
7376 Fixed a problem where the GPE bit masks were not initialized
7377 properly, causing erratic GPE behavior.
7379 Implemented limited support for multiple calling conventions. The
7380 code can be generated with either the VPL (variable parameter
7381 list, or "C") convention, or the FPL (fixed parameter list, or
7382 "Pascal") convention. The core subsystem is about 3.4% smaller
7383 when generated with FPL.
7388 Re-add some /proc/acpi/event functionality that was lost during
7391 Resolved issue with /proc events for fixed-feature buttons showing
7392 up as the system device.
7394 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
7396 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
7398 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
7400 Fixed limit interface & usage to fix bugs with passive cooling
7403 Restructured PRT support.
7406 ----------------------------------------
7407 Summary of changes for this label: 02_14_02
7410 1) ACPI CA Core Subsystem:
7412 Implemented support in AcpiLoadTable to allow loading of FACS and
7415 Suport for the now-obsolete interim 0.71 64-bit ACPI tables has
7416 been removed. All 64-bit platforms should be migrated to the ACPI
7417 2.0 tables. The actbl71.h header has been removed from the source
7420 All C macros defined within the subsystem have been prefixed with
7421 "ACPI_" to avoid collision with other system include files.
7423 Removed the return value for the two AcpiOsPrint interfaces, since
7424 it is never used and causes lint warnings for ignoring the return
7427 Added error checking to all internal mutex acquire and release
7428 calls. Although a failure from one of these interfaces is
7429 probably a fatal system error, these checks will cause the
7430 immediate abort of the currently executing method or interface.
7432 Fixed a problem where the AcpiSetCurrentResources interface could
7433 fault. This was a side effect of the deployment of the new memory
7436 Fixed a couple of problems with the Global Lock support introduced
7437 in the last major build. The "common" (1.0/2.0) internal FACS was
7438 being overwritten with the FACS signature and clobbering the
7439 Global Lock pointer. Also, the actual firmware FACS was being
7440 unmapped after construction of the "common" FACS, preventing
7441 access to the actual Global Lock field within it. The "common"
7442 internal FACS is no longer installed as an actual ACPI table; it
7443 is used simply as a global.
7445 Code and Data Size: Current core subsystem library sizes are shown
7446 below. These are the code and data sizes for the acpica.lib
7447 produced by the Microsoft Visual C++ 6.0 compiler, and these
7448 values do not include any ACPI driver or OSPM code. The debug
7449 version of the code includes the debug output trace mechanism and
7450 has a larger code and data size. Note that these values will vary
7451 depending on the efficiency of the compiler and the compiler
7452 options used during generation.
7454 Previous Release (02_07_01)
7455 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
7456 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
7458 Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total
7459 Debug Version: 138.0K Code, 56.6K Data, 194.6K Total
7464 Updated Linux-specific code for core macro and OSL interface
7465 changes described above.
7467 Improved /proc/acpi/event. It now can be opened only once and has
7468 proper poll functionality.
7470 Fixed and restructured power management (acpi_bus).
7472 Only create /proc "view by type" when devices of that class exist.
7474 Fixed "charging/discharging" bug (and others) in acpi_battery.
7476 Improved thermal zone code.
7479 3) ASL Compiler, version X2039:
7482 Implemented the new compiler restriction on ASL String hex/octal
7483 escapes to non-null, ASCII values. An error results if an invalid
7484 value is used. (This will require an ACPI 2.0 specification
7487 AML object labels that are output to the optional C and ASM source
7488 are now prefixed with both the ACPI table signature and table ID
7489 to help guarantee uniqueness within a large BIOS project.
7492 ----------------------------------------
7493 Summary of changes for this label: 02_01_02
7495 1) ACPI CA Core Subsystem:
7497 ACPI 2.0 support is complete in the entire Core Subsystem and the
7498 ASL compiler. All new ACPI 2.0 operators are implemented and all
7499 other changes for ACPI 2.0 support are complete. With
7500 simultaneous code and data optimizations throughout the subsystem,
7501 ACPI 2.0 support has been implemented with almost no additional
7502 cost in terms of code and data size.
7504 Implemented a new mechanism for allocation of return buffers. If
7505 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
7506 be allocated on behalf of the caller. Consolidated all return
7507 buffer validation and allocation to a common procedure. Return
7508 buffers will be allocated via the primary OSL allocation interface
7509 since it appears that a separate pool is not needed by most users.
7510 If a separate pool is required for these buffers, the caller can
7511 still use the original mechanism and pre-allocate the buffer(s).
7513 Implemented support for string operands within the DerefOf
7516 Restructured the Hardware and Event managers to be table driven,
7517 simplifying the source code and reducing the amount of generated
7520 Split the common read/write low-level ACPI register bitfield
7521 procedure into a separate read and write, simplifying the code
7524 Obsoleted the AcpiOsCallocate OSL interface. This interface was
7525 used only a handful of times and didn't have enough critical mass
7526 for a separate interface. Replaced with a common calloc procedure
7529 Fixed a reported problem with the GPE number mapping mechanism
7530 that allows GPE1 numbers to be non-contiguous with GPE0.
7531 Reorganized the GPE information and shrunk a large array that was
7532 originally large enough to hold info for all possible GPEs (256)
7533 to simply large enough to hold all GPEs up to the largest GPE
7534 number on the machine.
7536 Fixed a reported problem with resource structure alignment on 64-
7539 Changed the AcpiEnableEvent and AcpiDisableEvent external
7540 interfaces to not require any flags for the common case of
7541 enabling/disabling a GPE.
7543 Implemented support to allow a "Notify" on a Processor object.
7545 Most TBDs in comments within the source code have been resolved
7549 Fixed a problem in the interpreter where a standalone parent
7550 prefix (^) was not handled correctly in the interpreter and
7553 Removed obsolete and unnecessary GPE save/restore code.
7555 Implemented Field support in the ASL Load operator. This allows a
7556 table to be loaded from a named field, in addition to loading a
7557 table directly from an Operation Region.
7559 Implemented timeout and handle support in the external Global Lock
7562 Fixed a problem in the AcpiDump utility where pathnames were no
7563 longer being generated correctly during the dump of named objects.
7565 Modified the AML debugger to give a full display of if/while
7566 predicates instead of just one AML opcode at a time. (The
7567 predicate can have several nested ASL statements.) The old method
7568 was confusing during single stepping.
7570 Code and Data Size: Current core subsystem library sizes are shown
7571 below. These are the code and data sizes for the acpica.lib
7572 produced by the Microsoft Visual C++ 6.0 compiler, and these
7573 values do not include any ACPI driver or OSPM code. The debug
7574 version of the code includes the debug output trace mechanism and
7575 has a larger code and data size. Note that these values will vary
7576 depending on the efficiency of the compiler and the compiler
7577 options used during generation.
7579 Previous Release (12_18_01)
7580 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
7581 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
7583 Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total
7584 Debug Version: 136.9K Code, 56.4K Data, 193.3K Total
7588 Implemented fix for PIIX reverse throttling errata (Processor
7591 Added new Limit interface (Processor and Thermal drivers)
7593 New thermal policy (Thermal driver)
7595 Many updates to /proc
7597 Battery "low" event support (Battery driver)
7599 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
7601 IA32 - IA64 initialization unification, no longer experimental
7603 Menuconfig options redesigned
7605 3) ASL Compiler, version X2037:
7607 Implemented several new output features to simplify integration of
7608 AML code into firmware: 1) Output the AML in C source code with
7609 labels for each named ASL object. The original ASL source code
7610 is interleaved as C comments. 2) Output the AML in ASM source code
7611 with labels and interleaved ASL source. 3) Output the AML in
7612 raw hex table form, in either C or ASM.
7614 Implemented support for optional string parameters to the
7617 Completed support for embedded escape sequences within string
7618 literals. The compiler now supports all single character escapes
7619 as well as the Octal and Hex escapes. Note: the insertion of a
7620 null byte into a string literal (via the hex/octal escape) causes
7621 the string to be immediately terminated. A warning is issued.
7623 Fixed a problem where incorrect AML was generated for the case
7624 where an ASL namepath consists of a single parent prefix (
7626 ) with no trailing name segments.
7628 The compiler has been successfully generated with a 64-bit C
7634 ----------------------------------------
7635 Summary of changes for this label: 12_18_01
7639 Enhanced blacklist with reason and severity fields. Any table's
7640 signature may now be used to identify a blacklisted system.
7642 Call _PIC control method to inform the firmware which interrupt
7643 model the OS is using. Turn on any disabled link devices.
7645 Cleaned up busmgr /proc error handling (Andreas Dilger)
7647 2) ACPI CA Core Subsystem:
7649 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
7652 Completed implementation of the ACPI 2.0 "Continue",
7653 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
7654 operators. All new ACPI 2.0 operators are now implemented in both
7655 the ASL compiler and the AML interpreter. The only remaining ACPI
7656 2.0 task is support for the String data type in the DerefOf
7657 operator. Fixed a problem with AcquireMutex where the status code
7658 was lost if the caller had to actually wait for the mutex.
7660 Increased the maximum ASL Field size from 64K bits to 4G bits.
7662 Completed implementation of the external Global Lock interfaces --
7663 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and
7664 Handler parameters were added.
7666 Completed another pass at removing warnings and issues when
7667 compiling with 64-bit compilers. The code now compiles cleanly
7668 with the Intel 64-bit C/C++ compiler. Most notably, the pointer
7669 add and subtract (diff) macros have changed considerably.
7672 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
7673 64-bit platforms, 32-bits on all others. This type is used
7674 wherever memory allocation and/or the C sizeof() operator is used,
7675 and affects the OSL memory allocation interfaces AcpiOsAllocate
7676 and AcpiOsCallocate.
7678 Implemented sticky user breakpoints in the AML debugger.
7680 Code and Data Size: Current core subsystem library sizes are shown
7681 below. These are the code and data sizes for the acpica.lib
7682 produced by the Microsoft Visual C++ 6.0 compiler, and these
7683 values do not include any ACPI driver or OSPM code. The debug
7684 version of the code includes the debug output trace mechanism and
7685 has a larger code and data size. Note that these values will vary
7686 depending on the efficiency of the compiler and the compiler
7687 options used during generation.
7689 Previous Release (12_05_01)
7690 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
7691 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
7693 Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total
7694 Debug Version: 138.3K Code, 55.9K Data, 194.2K Total
7696 3) ASL Compiler, version X2034:
7698 Now checks for (and generates an error if detected) the use of a
7699 Break or Continue statement without an enclosing While statement.
7702 Successfully generated the compiler with the Intel 64-bit C
7705 ----------------------------------------
7706 Summary of changes for this label: 12_05_01
7708 1) ACPI CA Core Subsystem:
7710 The ACPI 2.0 CopyObject operator is fully implemented. This
7711 operator creates a new copy of an object (and is also used to
7712 bypass the "implicit conversion" mechanism of the Store operator.)
7714 The ACPI 2.0 semantics for the SizeOf operator are fully
7715 implemented. The change is that performing a SizeOf on a
7716 reference object causes an automatic dereference of the object to
7717 tha actual value before the size is evaluated. This behavior was
7718 undefined in ACPI 1.0.
7720 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
7721 have been implemented. The interrupt polarity and mode are now
7724 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
7725 appearing in Package objects were not properly converted to
7726 integers when the internal Package was converted to an external
7727 object (via the AcpiEvaluateObject interface.)
7729 Fixed a problem with the namespace object deletion mechanism for
7730 objects created by control methods. There were two parts to this
7731 problem: 1) Objects created during the initialization phase method
7732 parse were not being deleted, and 2) The object owner ID mechanism
7733 to track objects was broken.
7735 Fixed a problem where the use of the ASL Scope operator within a
7736 control method would result in an invalid opcode exception.
7738 Fixed a problem introduced in the previous label where the buffer
7739 length required for the _PRT structure was not being returned
7742 Code and Data Size: Current core subsystem library sizes are shown
7743 below. These are the code and data sizes for the acpica.lib
7744 produced by the Microsoft Visual C++ 6.0 compiler, and these
7745 values do not include any ACPI driver or OSPM code. The debug
7746 version of the code includes the debug output trace mechanism and
7747 has a larger code and data size. Note that these values will vary
7748 depending on the efficiency of the compiler and the compiler
7749 options used during generation.
7751 Previous Release (11_20_01)
7752 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
7753 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
7756 Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total
7757 Debug Version: 136.2K Code, 55.6K Data, 191.8K Total
7761 Updated all files to apply cleanly against 2.4.16.
7763 Added basic PCI Interrupt Routing Table (PRT) support for IA32
7764 (acpi_pci.c), and unified the PRT code for IA32 and IA64. This
7765 version supports both static and dyanmic PRT entries, but dynamic
7766 entries are treated as if they were static (not yet
7767 reconfigurable). Architecture- specific code to use this data is
7768 absent on IA32 but should be available shortly.
7770 Changed the initialization sequence to start the ACPI interpreter
7771 (acpi_init) prior to initialization of the PCI driver (pci_init)
7772 in init/main.c. This ordering is required to support PRT and
7773 facilitate other (future) enhancement. A side effect is that the
7774 ACPI bus driver and certain device drivers can no longer be loaded
7777 Modified the 'make menuconfig' options to allow PCI Interrupt
7778 Routing support to be included without the ACPI Bus and other
7781 3) ASL Compiler, version X2033:
7783 Fixed some issues with the use of the new CopyObject and
7784 DataTableRegion operators. Both are fully functional.
7786 ----------------------------------------
7787 Summary of changes for this label: 11_20_01
7789 20 November 2001. Summary of changes for this release.
7791 1) ACPI CA Core Subsystem:
7793 Updated Index support to match ACPI 2.0 semantics. Storing a
7794 Integer, String, or Buffer to an Index of a Buffer will store only
7795 the least-significant byte of the source to the Indexed buffer
7796 byte. Multiple writes are not performed.
7798 Fixed a problem where the access type used in an AccessAs ASL
7799 operator was not recorded correctly into the field object.
7801 Fixed a problem where ASL Event objects were created in a
7802 signalled state. Events are now created in an unsignalled state.
7804 The internal object cache is now purged after table loading and
7805 initialization to reduce the use of dynamic kernel memory -- on
7806 the assumption that object use is greatest during the parse phase
7807 of the entire table (versus the run-time use of individual control
7810 ACPI 2.0 variable-length packages are now fully operational.
7812 Code and Data Size: Code and Data optimizations have permitted new
7813 feature development with an actual reduction in the library size.
7814 Current core subsystem library sizes are shown below. These are
7815 the code and data sizes for the acpica.lib produced by the
7816 Microsoft Visual C++ 6.0 compiler, and these values do not include
7817 any ACPI driver or OSPM code. The debug version of the code
7818 includes the debug output trace mechanism and has a larger code
7819 and data size. Note that these values will vary depending on the
7820 efficiency of the compiler and the compiler options used during
7823 Previous Release (11_09_01):
7824 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
7825 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
7828 Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total
7829 Debug Version: 135.1K Code, 55.4K Data, 190.5K Total
7833 Enhanced the ACPI boot-time initialization code to allow the use
7834 of Local APIC tables for processor enumeration on IA-32, and to
7835 pave the way for a fully MPS-free boot (on SMP systems) in the
7836 near future. This functionality replaces
7837 arch/i386/kernel/acpitables.c, which was introduced in an earlier
7838 2.4.15-preX release. To enable this feature you must add
7839 "acpi_boot=on" to the kernel command line -- see the help entry
7840 for CONFIG_ACPI_BOOT for more information. An IA-64 release is in
7843 Restructured the configuration options to allow boot-time table
7844 parsing support without inclusion of the ACPI Interpreter (and
7847 NOTE: This release does not include fixes for the reported events,
7848 power-down, and thermal passive cooling issues (coming soon).
7852 Added additional typechecking for Fields within restricted access
7853 Operation Regions. All fields within EC and CMOS regions must be
7854 declared with ByteAcc. All fields withing SMBus regions must be
7855 declared with the BufferAcc access type.
7857 Fixed a problem where the listing file output of control methods
7858 no longer interleaved the actual AML code with the ASL source
7864 ----------------------------------------
7865 Summary of changes for this label: 11_09_01
7867 1) ACPI CA Core Subsystem:
7869 Implemented ACPI 2.0-defined support for writes to fields with a
7870 Buffer, String, or Integer source operand that is smaller than the
7871 target field. In these cases, the source operand is zero-extended
7872 to fill the target field.
7874 Fixed a problem where a Field starting bit offset (within the
7875 parent operation region) was calculated incorrectly if the
7877 alignment of the field differed from the access width. This
7878 affected CreateWordField, CreateDwordField, CreateQwordField, and
7879 possibly other fields that use the "AccessAny" keyword.
7881 Fixed a problem introduced in the 11_02_01 release where indirect
7882 stores through method arguments did not operate correctly.
7886 Implemented boot-time ACPI table parsing support
7887 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code
7888 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
7889 legacy BIOS interfaces (e.g. MPS) for the configuration of system
7890 processors, memory, and interrupts during setup_arch(). Note that
7891 this patch does not include the required architecture-specific
7892 changes required to apply this information -- subsequent patches
7893 will be posted for both IA32 and IA64 to achieve this.
7895 Added low-level sleep support for IA32 platforms, courtesy of Pat
7896 Mochel. This allows IA32 systems to transition to/from various
7897 sleeping states (e.g. S1, S3), although the lack of a centralized
7898 driver model and power-manageable drivers will prevent its
7899 (successful) use on most systems.
7901 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
7902 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
7903 tables" option, etc.
7905 Increased the default timeout for the EC driver from 1ms to 10ms
7906 (1000 cycles of 10us) to try to address AE_TIME errors during EC
7909 ----------------------------------------
7910 Summary of changes for this label: 11_02_01
7912 1) ACPI CA Core Subsystem:
7914 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
7915 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
7918 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
7919 changes to support ACPI 2.0 Qword field access. Read/Write
7920 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
7921 accept an ACPI_INTEGER (64 bits) as the value parameter. Also,
7922 the value parameter for the address space handler interface is now
7923 an ACPI_INTEGER. OSL implementations of these interfaces must now
7924 handle the case where the Width parameter is 64.
7926 Index Fields: Fixed a problem where unaligned bit assembly and
7927 disassembly for IndexFields was not supported correctly.
7929 Index and Bank Fields: Nested Index and Bank Fields are now
7930 supported. During field access, a check is performed to ensure
7931 that the value written to an Index or Bank register is not out of
7932 the range of the register. The Index (or Bank) register is
7933 written before each access to the field data. Future support will
7934 include allowing individual IndexFields to be wider than the
7937 Fields: Fixed a problem where the AML interpreter was incorrectly
7938 attempting to write beyond the end of a Field/OpRegion. This was
7939 a boundary case that occurred when a DWORD field was written to a
7940 BYTE access OpRegion, forcing multiple writes and causing the
7941 interpreter to write one datum too many.
7943 Fields: Fixed a problem with Field/OpRegion access where the
7944 starting bit address of a field was incorrectly calculated if the
7945 current access type was wider than a byte (WordAcc, DwordAcc, or
7948 Fields: Fixed a problem where forward references to individual
7949 FieldUnits (individual Field names within a Field definition) were
7950 not resolved during the AML table load.
7952 Fields: Fixed a problem where forward references from a Field
7953 definition to the parent Operation Region definition were not
7954 resolved during the AML table load.
7956 Fields: Duplicate FieldUnit names within a scope are now detected
7957 during AML table load.
7959 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
7960 returned an incorrect name for the root node.
7962 Code and Data Size: Code and Data optimizations have permitted new
7963 feature development with an actual reduction in the library size.
7964 Current core subsystem library sizes are shown below. These are
7965 the code and data sizes for the acpica.lib produced by the
7966 Microsoft Visual C++ 6.0 compiler, and these values do not include
7967 any ACPI driver or OSPM code. The debug version of the code
7968 includes the debug output trace mechanism and has a larger code
7969 and data size. Note that these values will vary depending on the
7970 efficiency of the compiler and the compiler options used during
7973 Previous Release (10_18_01):
7974 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
7975 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
7978 Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total
7979 Debug Version: 134.5K Code, 55.4K Data, 189.9K Total
7983 Improved /proc processor output (Pavel Machek) Re-added
7984 MODULE_LICENSE("GPL") to all modules.
7986 3) ASL Compiler version X2030:
7988 Duplicate FieldUnit names within a scope are now detected and
7993 Programmer Reference updated to reflect OSL and address space
7994 handler interface changes described above.
7996 ----------------------------------------
7997 Summary of changes for this label: 10_18_01
7999 ACPI CA Core Subsystem:
8001 Fixed a problem with the internal object reference count mechanism
8002 that occasionally caused premature object deletion. This resolves
8003 all of the outstanding problem reports where an object is deleted
8004 in the middle of an interpreter evaluation. Although this problem
8005 only showed up in rather obscure cases, the solution to the
8006 problem involved an adjustment of all reference counts involving
8007 objects attached to namespace nodes.
8009 Fixed a problem with Field support in the interpreter where
8010 writing to an aligned field whose length is an exact multiple (2
8011 or greater) of the field access granularity would cause an attempt
8012 to write beyond the end of the field.
8014 The top level AML opcode execution functions within the
8015 interpreter have been renamed with a more meaningful and
8016 consistent naming convention. The modules exmonad.c and
8017 exdyadic.c were eliminated. New modules are exoparg1.c,
8018 exoparg2.c, exoparg3.c, and exoparg6.c.
8020 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
8022 Fixed a problem where the AML debugger was causing some internal
8023 objects to not be deleted during subsystem termination.
8025 Fixed a problem with the external AcpiEvaluateObject interface
8026 where the subsystem would fault if the named object to be
8027 evaluated refered to a constant such as Zero, Ones, etc.
8029 Fixed a problem with IndexFields and BankFields where the
8030 subsystem would fault if the index, data, or bank registers were
8031 not defined in the same scope as the field itself.
8033 Added printf format string checking for compilers that support
8034 this feature. Corrected more than 50 instances of issues with
8035 format specifiers within invocations of ACPI_DEBUG_PRINT
8036 throughout the core subsystem code.
8038 The ASL "Revision" operator now returns the ACPI support level
8039 implemented in the core - the value "2" since the ACPI 2.0 support
8040 is more than 50% implemented.
8042 Enhanced the output of the AML debugger "dump namespace" command
8043 to output in a more human-readable form.
8045 Current core subsystem library code sizes are shown below. These
8047 are the code and data sizes for the acpica.lib produced by the
8048 Microsoft Visual C++ 6.0 compiler, and these values do not include
8049 any ACPI driver or OSPM code. The debug version of the code
8050 includes the full debug trace mechanism -- leading to a much
8052 larger code and data size. Note that these values will vary
8053 depending on the efficiency of the compiler and the compiler
8054 options used during generation.
8056 Previous Label (09_20_01):
8057 Non-Debug Version: 65K Code, 5K Data, 70K Total
8058 Debug Version: 138K Code, 58K Data, 196K Total
8062 Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total
8063 Debug Version: 136.7K Code, 57.4K Data, 194.2K Total
8067 Implemented a "Bad BIOS Blacklist" to track machines that have
8068 known ASL/AML problems.
8070 Enhanced the /proc interface for the thermal zone driver and added
8071 support for _HOT (the critical suspend trip point). The 'info'
8072 file now includes threshold/policy information, and allows setting
8073 of _SCP (cooling preference) and _TZP (polling frequency) values
8074 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
8075 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
8076 preference to the passive/quiet mode (if supported by the ASL).
8078 Implemented a workaround for a gcc bug that resuted in an OOPs
8079 when loading the control method battery driver.
8081 ----------------------------------------
8082 Summary of changes for this label: 09_20_01
8084 ACPI CA Core Subsystem:
8086 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
8087 modified to allow individual GPE levels to be flagged as wake-
8088 enabled (i.e., these GPEs are to remain enabled when the platform
8091 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
8092 support wake-enabled GPEs. This means that upon entering the
8093 sleep state, all GPEs that are not wake-enabled are disabled.
8094 When leaving the sleep state, these GPEs are reenabled.
8096 A local double-precision divide/modulo module has been added to
8097 enhance portability to OS kernels where a 64-bit math library is
8098 not available. The new module is "utmath.c".
8100 Several optimizations have been made to reduce the use of CPU
8101 stack. Originally over 2K, the maximum stack usage is now below
8102 2K at 1860 bytes (1.82k)
8104 Fixed a problem with the AcpiGetFirmwareTable interface where the
8105 root table pointer was not mapped into a logical address properly.
8107 Fixed a problem where a NULL pointer was being dereferenced in the
8108 interpreter code for the ASL Notify operator.
8110 Fixed a problem where the use of the ASL Revision operator
8111 returned an error. This operator now returns the current version
8112 of the ACPI CA core subsystem.
8114 Fixed a problem where objects passed as control method parameters
8115 to AcpiEvaluateObject were always deleted at method termination.
8116 However, these objects may end up being stored into the namespace
8117 by the called method. The object reference count mechanism was
8118 applied to these objects instead of a force delete.
8120 Fixed a problem where static strings or buffers (contained in the
8121 AML code) that are declared as package elements within the ASL
8122 code could cause a fault because the interpreter would attempt to
8123 delete them. These objects are now marked with the "static
8124 object" flag to prevent any attempt to delete them.
8126 Implemented an interpreter optimization to use operands directly
8127 from the state object instead of extracting the operands to local
8128 variables. This reduces stack use and code size, and improves
8131 The module exxface.c was eliminated as it was an unnecessary extra
8134 Current core subsystem library code sizes are shown below. These
8135 are the code and data sizes for the acpica.lib produced by the
8136 Microsoft Visual C++ 6.0 compiler, and these values do not include
8137 any ACPI driver or OSPM code. The debug version of the code
8138 includes the full debug trace mechanism -- leading to a much
8139 larger code and data size. Note that these values will vary
8140 depending on the efficiency of the compiler and the compiler
8141 options used during generation.
8143 Non-Debug Version: 65K Code, 5K Data, 70K Total
8144 (Previously 69K) Debug Version: 138K Code, 58K Data, 196K
8145 Total (Previously 195K)
8149 Support for ACPI 2.0 64-bit integers has been added. All ACPI
8150 Integer objects are now 64 bits wide
8152 All Acpi data types and structures are now in lower case. Only
8153 Acpi macros are upper case for differentiation.
8157 Changes to the external interfaces as described above.
8159 ----------------------------------------
8160 Summary of changes for this label: 08_31_01
8162 ACPI CA Core Subsystem:
8164 A bug with interpreter implementation of the ASL Divide operator
8165 was found and fixed. The implicit function return value (not the
8166 explicit store operands) was returning the remainder instead of
8167 the quotient. This was a longstanding bug and it fixes several
8168 known outstanding issues on various platforms.
8170 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
8171 been further optimized for size. There are 700 invocations of the
8172 DEBUG_PRINT macro alone, so each optimization reduces the size of
8173 the debug version of the subsystem significantly.
8175 A stack trace mechanism has been implemented. The maximum stack
8176 usage is about 2K on 32-bit platforms. The debugger command "stat
8177 stack" will display the current maximum stack usage.
8179 All public symbols and global variables within the subsystem are
8180 now prefixed with the string "Acpi". This keeps all of the
8181 symbols grouped together in a kernel map, and avoids conflicts
8182 with other kernel subsystems.
8184 Most of the internal fixed lookup tables have been moved into the
8185 code segment via the const operator.
8187 Several enhancements have been made to the interpreter to both
8188 reduce the code size and improve performance.
8190 Current core subsystem library code sizes are shown below. These
8191 are the code and data sizes for the acpica.lib produced by the
8192 Microsoft Visual C++ 6.0 compiler, and these values do not include
8193 any ACPI driver or OSPM code. The debug version of the code
8194 includes the full debug trace mechanism which contains over 700
8195 invocations of the DEBUG_PRINT macro, 500 function entry macro
8196 invocations, and over 900 function exit macro invocations --
8197 leading to a much larger code and data size. Note that these
8198 values will vary depending on the efficiency of the compiler and
8199 the compiler options used during generation.
8201 Non-Debug Version: 64K Code, 5K Data, 69K Total
8202 Debug Version: 137K Code, 58K Data, 195K Total
8206 Implemented wbinvd() macro, pending a kernel-wide definition.
8208 Fixed /proc/acpi/event to handle poll() and short reads.
8210 ASL Compiler, version X2026:
8212 Fixed a problem introduced in the previous label where the AML
8214 code emitted for package objects produced packages with zero
8217 ----------------------------------------
8218 Summary of changes for this label: 08_16_01
8220 ACPI CA Core Subsystem:
8222 The following ACPI 2.0 ASL operators have been implemented in the
8223 AML interpreter (These are already supported by the Intel ASL
8224 compiler): ToDecimalString, ToHexString, ToString, ToInteger, and
8225 ToBuffer. Support for 64-bit AML constants is implemented in the
8226 AML parser, debugger, and disassembler.
8228 The internal memory tracking mechanism (leak detection code) has
8229 been upgraded to reduce the memory overhead (a separate tracking
8230 block is no longer allocated for each memory allocation), and now
8231 supports all of the internal object caches.
8233 The data structures and code for the internal object caches have
8234 been coelesced and optimized so that there is a single cache and
8235 memory list data structure and a single group of functions that
8236 implement generic cache management. This has reduced the code
8237 size in both the debug and release versions of the subsystem.
8239 The DEBUG_PRINT macro(s) have been optimized for size and replaced
8240 by ACPI_DEBUG_PRINT. The syntax for this macro is slightly
8241 different, because it generates a single call to an internal
8242 function. This results in a savings of about 90 bytes per
8243 invocation, resulting in an overall code and data savings of about
8244 16% in the debug version of the subsystem.
8248 Fixed C3 disk corruption problems and re-enabled C3 on supporting
8251 Integrated low-level sleep code by Patrick Mochel.
8253 Further tweaked source code Linuxization.
8259 Support for ACPI 2.0 variable length packages is fixed/completed.
8261 Fixed a problem where the optional length parameter for the ACPI
8262 2.0 ToString operator.
8264 Fixed multiple extraneous error messages when a syntax error is
8265 detected within the declaration line of a control method.
8267 ----------------------------------------
8268 Summary of changes for this label: 07_17_01
8270 ACPI CA Core Subsystem:
8272 Added a new interface named AcpiGetFirmwareTable to obtain any
8273 ACPI table via the ACPI signature. The interface can be called at
8274 any time during kernel initialization, even before the kernel
8275 virtual memory manager is initialized and paging is enabled. This
8276 allows kernel subsystems to obtain ACPI tables very early, even
8277 before the ACPI CA subsystem is initialized.
8279 Fixed a problem where Fields defined with the AnyAcc attribute
8280 could be resolved to the incorrect address under the following
8281 conditions: 1) the field width is larger than 8 bits and 2) the
8282 parent operation region is not defined on a DWORD boundary.
8284 Fixed a problem where the interpreter is not being locked during
8285 namespace initialization (during execution of the _INI control
8286 methods), causing an error when an attempt is made to release it
8289 ACPI 2.0 support in the AML Interpreter has begun and will be
8290 ongoing throughout the rest of this year. In this label, The Mod
8291 operator is implemented.
8293 Added a new data type to contain full PCI addresses named
8294 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
8295 and Function values.
8299 Enhanced the Linux version of the source code to change most
8300 capitalized ACPI type names to lowercase. For example, all
8301 instances of ACPI_STATUS are changed to acpi_status. This will
8302 result in a large diff, but the change is strictly cosmetic and
8303 aligns the CA code closer to the Linux coding standard.
8307 The interfaces to the PCI configuration space have been changed to
8308 add the PCI Segment number and to split the single 32-bit combined
8309 DeviceFunction field into two 16-bit fields. This was
8310 accomplished by moving the four values that define an address in
8311 PCI configuration space (segment, bus, device, and function) to
8312 the new ACPI_PCI_ID structure.
8314 The changes to the PCI configuration space interfaces led to a
8315 reexamination of the complete set of address space access
8316 interfaces for PCI, I/O, and Memory. The previously existing 18
8317 interfaces have proven difficult to maintain (any small change
8318 must be propagated across at least 6 interfaces) and do not easily
8319 allow for future expansion to 64 bits if necessary. Also, on some
8320 systems, it would not be appropriate to demultiplex the access
8321 width (8, 16, 32,or 64) before calling the OSL if the
8322 corresponding native OS interfaces contain a similar access width
8323 parameter. For these reasons, the 18 address space interfaces
8324 have been replaced by these 6 new ones:
8326 AcpiOsReadPciConfiguration
8327 AcpiOsWritePciConfiguration
8333 Added a new interface named AcpiOsGetRootPointer to allow the OSL
8334 to perform the platform and/or OS-specific actions necessary to
8335 obtain the ACPI RSDP table pointer. On IA-32 platforms, this
8336 interface will simply call down to the CA core to perform the low-
8337 memory search for the table. On IA-64, the RSDP is obtained from
8338 EFI. Migrating this interface to the OSL allows the CA core to
8340 remain OS and platform independent.
8342 Added a new interface named AcpiOsSignal to provide a generic
8343 "function code and pointer" interface for various miscellaneous
8344 signals and notifications that must be made to the host OS. The
8345 first such signals are intended to support the ASL Fatal and
8346 Breakpoint operators. In the latter case, the AcpiOsBreakpoint
8347 interface has been obsoleted.
8349 The definition of the AcpiFormatException interface has been
8350 changed to simplify its use. The caller no longer must supply a
8351 buffer to the call; A pointer to a const string is now returned
8352 directly. This allows the call to be easily used in printf
8353 statements, etc. since the caller does not have to manage a local
8357 ASL Compiler, Version X2025:
8359 The ACPI 2.0 Switch/Case/Default operators have been implemented
8360 and are fully functional. They will work with all ACPI 1.0
8361 interpreters, since the operators are simply translated to If/Else
8364 The ACPI 2.0 ElseIf operator is implemented and will also work
8365 with 1.0 interpreters, for the same reason.
8367 Implemented support for ACPI 2.0 variable-length packages. These
8368 packages have a separate opcode, and their size is determined by
8369 the interpreter at run-time.
8371 Documentation The ACPI CA Programmer Reference has been updated to
8372 reflect the new interfaces and changes to existing interfaces.
8374 ------------------------------------------
8375 Summary of changes for this label: 06_15_01
8377 ACPI CA Core Subsystem:
8379 Fixed a problem where a DWORD-accessed field within a Buffer
8380 object would get its byte address inadvertently rounded down to
8381 the nearest DWORD. Buffers are always Byte-accessible.
8383 ASL Compiler, version X2024:
8385 Fixed a problem where the Switch() operator would either fault or
8386 hang the compiler. Note however, that the AML code for this ACPI
8387 2.0 operator is not yet implemented.
8389 Compiler uses the new AcpiOsGetTimer interface to obtain compile
8392 Implementation of the CreateField operator automatically converts
8393 a reference to a named field within a resource descriptor from a
8394 byte offset to a bit offset if required.
8396 Added some missing named fields from the resource descriptor
8397 support. These are the names that are automatically created by the
8398 compiler to reference fields within a descriptor. They are only
8399 valid at compile time and are not passed through to the AML
8402 Resource descriptor named fields are now typed as Integers and
8403 subject to compile-time typechecking when used in expressions.
8405 ------------------------------------------
8406 Summary of changes for this label: 05_18_01
8408 ACPI CA Core Subsystem:
8410 Fixed a couple of problems in the Field support code where bits
8411 from adjacent fields could be returned along with the proper field
8412 bits. Restructured the field support code to improve performance,
8413 readability and maintainability.
8415 New DEBUG_PRINTP macro automatically inserts the procedure name
8416 into the output, saving hundreds of copies of procedure name
8417 strings within the source, shrinking the memory footprint of the
8418 debug version of the core subsystem.
8420 Source Code Structure:
8422 The source code directory tree was restructured to reflect the
8423 current organization of the component architecture. Some files
8424 and directories have been moved and/or renamed.
8428 Fixed leaking kacpidpc processes.
8430 Fixed queueing event data even when /proc/acpi/event is not
8433 ASL Compiler, version X2020:
8435 Memory allocation performance enhancement - over 24X compile time
8436 improvement on large ASL files. Parse nodes and namestring
8437 buffers are now allocated from a large internal compiler buffer.
8439 The temporary .SRC file is deleted unless the "-s" option is
8442 The "-d" debug output option now sends all output to the .DBG file
8443 instead of the console.
8445 "External" second parameter is now optional
8447 "ElseIf" syntax now properly allows the predicate
8449 Last operand to "Load" now recognized as a Target operand
8451 Debug object can now be used anywhere as a normal object.
8453 ResourceTemplate now returns an object of type BUFFER
8455 EISAID now returns an object of type INTEGER
8457 "Index" now works with a STRING operand
8459 "LoadTable" now accepts optional parameters
8461 "ToString" length parameter is now optional
8463 "Interrupt (ResourceType," parse error fixed.
8465 "Register" with a user-defined region space parse error fixed
8467 Escaped backslash at the end of a string ("\\") scan/parse error
8470 "Revision" is now an object of type INTEGER.
8474 ------------------------------------------
8475 Summary of changes for this label: 05_02_01
8479 /proc/acpi/event now blocks properly.
8481 Removed /proc/sys/acpi. You can still dump your DSDT from
8484 ACPI CA Core Subsystem:
8486 Fixed a problem introduced in the previous label where some of the
8487 "small" resource descriptor types were not recognized.
8489 Improved error messages for the case where an ASL Field is outside
8490 the range of the parent operation region.
8492 ASL Compiler, version X2018:
8495 Added error detection for ASL Fields that extend beyond the length
8496 of the parent operation region (only if the length of the region
8497 is known at compile time.) This includes fields that have a
8498 minimum access width that is smaller than the parent region, and
8499 individual field units that are partially or entirely beyond the
8500 extent of the parent.
8504 ------------------------------------------
8505 Summary of changes for this label: 04_27_01
8507 ACPI CA Core Subsystem:
8509 Fixed a problem where the namespace mutex could be released at the
8510 wrong time during execution of AcpiRemoveAddressSpaceHandler.
8512 Added optional thread ID output for debug traces, to simplify
8513 debugging of multiple threads. Added context switch notification
8514 when the debug code realizes that a different thread is now
8515 executing ACPI code.
8517 Some additional external data types have been prefixed with the
8518 string "ACPI_" for consistency. This may effect existing code.
8519 The data types affected are the external callback typedefs - e.g.,
8521 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
8525 Fixed an issue with the OSL semaphore implementation where a
8526 thread was waking up with an error from receiving a SIGCHLD
8529 Linux version of ACPI CA now uses the system C library for string
8530 manipulation routines instead of a local implementation.
8532 Cleaned up comments and removed TBDs.
8534 ASL Compiler, version X2017:
8536 Enhanced error detection and reporting for all file I/O
8541 Programmer Reference updated to version 1.06.
8545 ------------------------------------------
8546 Summary of changes for this label: 04_13_01
8548 ACPI CA Core Subsystem:
8550 Restructured support for BufferFields and RegionFields.
8551 BankFields support is now fully operational. All known 32-bit
8552 limitations on field sizes have been removed. Both BufferFields
8553 and (Operation) RegionFields are now supported by the same field
8556 Resource support now supports QWORD address and IO resources. The
8557 16/32/64 bit address structures and the Extended IRQ structure
8558 have been changed to properly handle Source Resource strings.
8560 A ThreadId of -1 is now used to indicate a "mutex not acquired"
8561 condition internally and must never be returned by AcpiOsThreadId.
8562 This reserved value was changed from 0 since Unix systems allow a
8567 Driver code reorganized to enhance portability
8569 Added a kernel configuration option to control ACPI_DEBUG
8571 Fixed the EC driver to honor _GLK.
8573 ASL Compiler, version X2016:
8575 Fixed support for the "FixedHw" keyword. Previously, the FixedHw
8576 address space was set to 0, not 0x7f as it should be.
8578 ------------------------------------------
8579 Summary of changes for this label: 03_13_01
8581 ACPI CA Core Subsystem:
8583 During ACPI initialization, the _SB_._INI method is now run if
8586 Notify handler fix - notifies are deferred until the parent method
8587 completes execution. This fixes the "mutex already acquired"
8588 issue seen occasionally.
8590 Part of the "implicit conversion" rules in ACPI 2.0 have been
8591 found to cause compatibility problems with existing ASL/AML. The
8592 convert "result-to-target-type" implementation has been removed
8593 for stores to method Args and Locals. Source operand conversion
8594 is still fully implemented. Possible changes to ACPI 2.0
8595 specification pending.
8597 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
8600 Fix for compiler warnings for 64-bit compiles.
8604 /proc output aligned for easier parsing.
8606 Release-version compile problem fixed.
8608 New kernel configuration options documented in Configure.help.
8610 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
8615 Power resource driver integrated with bus manager.
8617 Fixed kernel fault during active cooling for thermal zones.
8621 The source code tree has been restructured.
8625 ------------------------------------------
8626 Summary of changes for this label: 03_02_01
8628 Linux OS Services Layer (OSL):
8630 Major revision of all Linux-specific code.
8632 Modularized all ACPI-specific drivers.
8634 Added new thermal zone and power resource drivers.
8636 Revamped /proc interface (new functionality is under /proc/acpi).
8638 New kernel configuration options.
8642 New kernel configuration options not documented in Configure.help
8646 Module dependencies not currently implemented. If used, they
8647 should be loaded in this order: busmgr, power, ec, system,
8648 processor, battery, ac_adapter, button, thermal.
8650 Modules will not load if CONFIG_MODVERSION is set.
8652 IBM 600E - entering S5 may reboot instead of shutting down.
8654 IBM 600E - Sleep button may generate "Invalid <NULL> context"
8657 Some systems may fail with "execution mutex already acquired"
8660 ACPI CA Core Subsystem:
8662 Added a new OSL Interface, AcpiOsGetThreadId. This was required
8663 for the deadlock detection code. Defined to return a non-zero, 32-
8664 bit thread ID for the currently executing thread. May be a non-
8665 zero constant integer on single-thread systems.
8667 Implemented deadlock detection for internal subsystem mutexes. We
8668 may add conditional compilation for this code (debug only) later.
8670 ASL/AML Mutex object semantics are now fully supported. This
8671 includes multiple acquires/releases by owner and support for the
8673 Mutex SyncLevel parameter.
8675 A new "Force Release" mechanism automatically frees all ASL
8676 Mutexes that have been acquired but not released when a thread
8677 exits the interpreter. This forces conformance to the ACPI spec
8678 ("All mutexes must be released when an invocation exits") and
8679 prevents deadlocked ASL threads. This mechanism can be expanded
8680 (later) to monitor other resource acquisitions if OEM ASL code
8681 continues to misbehave (which it will).
8683 Several new ACPI exception codes have been added for the Mutex
8686 Recursive method calls are now allowed and supported (the ACPI
8687 spec does in fact allow recursive method calls.) The number of
8688 recursive calls is subject to the restrictions imposed by the
8689 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
8692 Implemented support for the SyncLevel parameter for control
8693 methods (ACPI 2.0 feature)
8695 Fixed a deadlock problem when multiple threads attempted to use
8698 Fixed a problem where the string length of a String package
8699 element was not always set in a package returned from
8702 Fixed a problem where the length of a String package element was
8703 not always included in the length of the overall package returned
8704 from AcpiEvaluateObject.
8706 Added external interfaces (Acpi*) to the ACPI debug memory
8707 manager. This manager keeps a list of all outstanding
8708 allocations, and can therefore detect memory leaks and attempts to
8709 free memory blocks more than once. Useful for code such as the
8710 power manager, etc. May not be appropriate for device drivers.
8711 Performance with the debug code enabled is slow.
8713 The ACPI Global Lock is now an optional hardware element.
8715 ASL Compiler Version X2015:
8717 Integrated changes to allow the compiler to be generated on
8720 Linux makefile added to generate the compiler on Linux
8724 All platform-specific headers have been moved to their own
8725 subdirectory, Include/Platform.
8727 New source file added, Interpreter/ammutex.c
8729 New header file, Include/acstruct.h
8733 The programmer reference has been updated for the following new
8734 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
8736 ------------------------------------------
8737 Summary of changes for this label: 02_08_01
8739 Core ACPI CA Subsystem: Fixed a problem where an error was
8740 incorrectly returned if the return resource buffer was larger than
8741 the actual data (in the resource interfaces).
8743 References to named objects within packages are resolved to the
8745 full pathname string before packages are returned directly (via
8746 the AcpiEvaluateObject interface) or indirectly via the resource
8749 Linux OS Services Layer (OSL):
8751 Improved /proc battery interface.
8754 Added C-state debugging output and other miscellaneous fixes.
8756 ASL Compiler Version X2014:
8758 All defined method arguments can now be used as local variables,
8759 including the ones that are not actually passed in as parameters.
8760 The compiler tracks initialization of the arguments and issues an
8761 exception if they are used without prior assignment (just like
8764 The -o option now specifies a filename prefix that is used for all
8765 output files, including the AML output file. Otherwise, the
8766 default behavior is as follows: 1) the AML goes to the file
8767 specified in the DSDT. 2) all other output files use the input
8768 source filename as the base.
8770 ------------------------------------------
8771 Summary of changes for this label: 01_25_01
8773 Core ACPI CA Subsystem: Restructured the implementation of object
8774 store support within the interpreter. This includes support for
8775 the Store operator as well as any ASL operators that include a
8778 Partially implemented support for Implicit Result-to-Target
8779 conversion. This is when a result object is converted on the fly
8780 to the type of an existing target object. Completion of this
8781 support is pending further analysis of the ACPI specification
8782 concerning this matter.
8784 CPU-specific code has been removed from the subsystem (hardware
8787 New Power Management Timer functions added
8789 Linux OS Services Layer (OSL): Moved system state transition code
8790 to the core, fixed it, and modified Linux OSL accordingly.
8792 Fixed C2 and C3 latency calculations.
8795 We no longer use the compilation date for the version message on
8796 initialization, but retrieve the version from AcpiGetSystemInfo().
8798 Incorporated for fix Sony VAIO machines.
8800 Documentation: The Programmer Reference has been updated and
8804 ASL Compiler: Version X2013: Fixed a problem where the line
8805 numbering and error reporting could get out of sync in the
8806 presence of multiple include files.
8808 ------------------------------------------
8809 Summary of changes for this label: 01_15_01
8811 Core ACPI CA Subsystem:
8813 Implemented support for type conversions in the execution of the
8814 ASL Concatenate operator (The second operand is converted to
8815 match the type of the first operand before concatenation.)
8817 Support for implicit source operand conversion is partially
8818 implemented. The ASL source operand types Integer, Buffer, and
8819 String are freely interchangeable for most ASL operators and are
8820 converted by the interpreter on the fly as required. Implicit
8821 Target operand conversion (where the result is converted to the
8822 target type before storing) is not yet implemented.
8824 Support for 32-bit and 64-bit BCD integers is implemented.
8826 Problem fixed where a field read on an aligned field could cause a
8827 read past the end of the field.
8829 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
8830 does not return a value, but the caller expects one. (The ASL
8831 compiler flags this as a warning.)
8836 1. Static typechecking of all operands is implemented. This
8837 prevents the use of invalid objects (such as using a Package where
8838 an Integer is required) at compile time instead of at interpreter
8840 2. The ASL source line is printed with ALL errors and warnings.
8841 3. Bug fix for source EOF without final linefeed.
8842 4. Debug option is split into a parse trace and a namespace trace.
8843 5. Namespace output option (-n) includes initial values for
8844 integers and strings.
8845 6. Parse-only option added for quick syntax checking.
8846 7. Compiler checks for duplicate ACPI name declarations
8849 1. Relaxed typechecking to allow interchangeability between
8850 strings, integers, and buffers. These types are now converted by
8851 the interpreter at runtime.
8852 2. Compiler reports time taken by each internal subsystem in the
8856 ------------------------------------------
8857 Summary of changes for this label: 12_14_00
8861 This is the first official release of the compiler. Since the
8862 compiler requires elements of the Core Subsystem, this label
8863 synchronizes everything.
8865 ------------------------------------------
8866 Summary of changes for this label: 12_08_00
8869 Fixed a problem where named references within the ASL definition
8870 of both OperationRegions and CreateXXXFields did not work
8871 properly. The symptom was an AE_AML_OPERAND_TYPE during
8872 initialization of the region/field. This is similar (but not
8873 related internally) to the problem that was fixed in the last
8876 Implemented both 32-bit and 64-bit support for the BCD ASL
8877 functions ToBCD and FromBCD.
8879 Updated all legal headers to include "2000" in the copyright
8882 ------------------------------------------
8883 Summary of changes for this label: 12_01_00
8885 Fixed a problem where method invocations within the ASL definition
8886 of both OperationRegions and CreateXXXFields did not work
8887 properly. The symptom was an AE_AML_OPERAND_TYPE during
8888 initialization of the region/field:
8890 nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
8891 [DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
8894 Fixed a problem where operators with more than one nested
8895 subexpression would fail. The symptoms were varied, by mostly
8896 AE_AML_OPERAND_TYPE errors. This was actually a rather serious
8897 problem that has gone unnoticed until now.
8899 Subtract (Add (1,2), Multiply (3,4))
8901 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
8902 previous build (The prefix part of a relative path was handled
8905 Fixed a problem where Operation Region initialization failed if
8906 the operation region name was a "namepath" instead of a simple
8907 "nameseg". Symptom was an AE_NO_OPERAND error.
8909 Fixed a problem where an assignment to a local variable via the
8910 indirect RefOf mechanism only worked for the first such
8911 assignment. Subsequent assignments were ignored.
8913 ------------------------------------------
8914 Summary of changes for this label: 11_15_00
8916 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
8917 0.71 extensions. Note: although we can read ACPI 2.0 BIOS tables,
8918 the AML interpreter does NOT have support for the new 2.0 ASL
8919 grammar terms at this time.
8921 All ACPI hardware access is via the GAS structures in the ACPI 2.0
8924 All physical memory addresses across all platforms are now 64 bits
8925 wide. Logical address width remains dependent on the platform
8928 AcpiOsMapMemory interface changed to a 64-bit physical address.
8930 The AML interpreter integer size is now 64 bits, as per the ACPI
8933 For backwards compatibility with ACPI 1.0, ACPI tables with a
8934 revision number less than 2 use 32-bit integers only.
8936 Fixed a problem where the evaluation of OpRegion operands did not
8937 always resolve them to numbers properly.
8939 ------------------------------------------
8940 Summary of changes for this label: 10_20_00
8942 Fix for CBN_._STA issue. This fix will allow correct access to
8943 CBN_ OpRegions when the _STA returns 0x8.
8945 Support to convert ACPI constants (Ones, Zeros, One) to actual
8946 values before a package object is returned
8948 Fix for method call as predicate to if/while construct causing
8949 incorrect if/while behavior
8951 Fix for Else block package lengths sometimes calculated wrong (if
8954 Fix for Processor object length field, was always zero
8956 Table load abort if FACP sanity check fails
8958 Fix for problem with Scope(name) if name already exists
8960 Warning emitted if a named object referenced cannot be found
8961 (resolved) during method execution.
8967 ------------------------------------------
8968 Summary of changes for this label: 9_29_00
8970 New table initialization interfaces: AcpiInitializeSubsystem no
8971 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
8972 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
8973 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
8976 Note: These interface changes require changes to all existing OSDs
8978 The PCI_Config default address space handler is always installed
8979 at the root namespace object.
8981 -------------------------------------------
8982 Summary of changes for this label: 09_15_00
8984 The new initialization architecture is implemented. New
8985 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
8986 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
8988 (Namespace is automatically loaded when a table is loaded)
8990 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
8991 52 bytes to 32 bytes. There is usually one of these for every
8992 namespace object, so the memory savings is significant.
8994 Implemented just-in-time evaluation of the CreateField operators.
8996 Bug fixes for IA-64 support have been integrated.
8998 Additional code review comments have been implemented
9000 The so-called "third pass parse" has been replaced by a final walk
9001 through the namespace to initialize all operation regions (address
9002 spaces) and fields that have not yet been initialized during the
9003 execution of the various _INI and REG methods.
9005 New file - namespace/nsinit.c
9007 -------------------------------------------
9008 Summary of changes for this label: 09_01_00
9010 Namespace manager data structures have been reworked to change the
9011 primary object from a table to a single object. This has
9012 resulted in dynamic memory savings of 3X within the namespace and
9013 2X overall in the ACPI CA subsystem.
9015 Fixed problem where the call to AcpiEvFindPciRootBuses was
9016 inadvertently left commented out.
9018 Reduced the warning count when generating the source with the GCC
9021 Revision numbers added to each module header showing the
9022 SourceSafe version of the file. Please refer to this version
9023 number when giving us feedback or comments on individual modules.
9025 The main object types within the subsystem have been renamed to
9026 clarify their purpose:
9028 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
9029 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
9030 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
9032 NOTE: no changes to the initialization sequence are included in
9035 -------------------------------------------
9036 Summary of changes for this label: 08_23_00
9038 Fixed problem where TerminateControlMethod was being called
9039 multiple times per method
9041 Fixed debugger problem where single stepping caused a semaphore to
9044 Improved performance through additional parse object caching -
9045 added ACPI_EXTENDED_OP type
9047 -------------------------------------------
9048 Summary of changes for this label: 08_10_00
9050 Parser/Interpreter integration: Eliminated the creation of
9051 complete parse trees for ACPI tables and control methods.
9052 Instead, parse subtrees are created and then deleted as soon as
9053 they are processed (Either entered into the namespace or executed
9054 by the interpreter). This reduces the use of dynamic kernel
9055 memory significantly. (about 10X)
9057 Exception codes broken into classes and renumbered. Be sure to
9058 recompile all code that includes acexcep.h. Hopefully we won't
9059 have to renumber the codes again now that they are split into
9060 classes (environment, programmer, AML code, ACPI table, and
9063 Fixed some additional alignment issues in the Resource Manager
9066 Implemented semaphore tracking in the AcpiExec utility, and fixed
9067 several places where mutexes/semaphores were being unlocked
9068 without a corresponding lock operation. There are no known
9069 semaphore or mutex "leaks" at this time.
9071 Fixed the case where an ASL Return operator is used to return an
9074 -------------------------------------------
9075 Summary of changes for this label: 07_28_00
9077 Fixed a problem with the way addresses were calculated in
9078 AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem
9079 manifested itself when a Field was created with WordAccess or
9080 DwordAccess, but the field unit defined within the Field was less
9082 than a Word or Dword.
9084 Fixed a problem in AmlDumpOperands() module's loop to pull
9085 operands off of the operand stack to display information. The
9086 problem manifested itself as a TLB error on 64-bit systems when
9087 accessing an operand stack with two or more operands.
9089 Fixed a problem with the PCI configuration space handlers where
9090 context was getting confused between accesses. This required a
9091 change to the generic address space handler and address space
9092 setup definitions. Handlers now get both a global handler context
9093 (this is the one passed in by the user when executing
9094 AcpiInstallAddressSpaceHandler() and a specific region context
9095 that is unique to each region (For example, the _ADR, _SEG and
9096 _BBN values associated with a specific region). The generic
9097 function definitions have changed to the following:
9099 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
9100 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
9101 *HandlerContext, // This used to be void *Context void
9102 *RegionContext); // This is an additional parameter
9104 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
9105 RegionHandle, UINT32 Function, void *HandlerContext, void
9106 **RegionContext); // This used to be **ReturnContext
9108 -------------------------------------------
9109 Summary of changes for this label: 07_21_00
9111 Major file consolidation and rename. All files within the
9112 interpreter have been renamed as well as most header files. This
9113 was done to prevent collisions with existing files in the host
9114 OSs -- filenames such as "config.h" and "global.h" seem to be
9115 quite common. The VC project files have been updated. All
9116 makefiles will require modification.
9118 The parser/interpreter integration continues in Phase 5 with the
9119 implementation of a complete 2-pass parse (the AML is parsed
9120 twice) for each table; This avoids the construction of a huge
9121 parse tree and therefore reduces the amount of dynamic memory
9122 required by the subsystem. Greater use of the parse object cache
9123 means that performance is unaffected.
9125 Many comments from the two code reviews have been rolled in.
9127 The 64-bit alignment support is complete.
9129 -------------------------------------------
9130 Summary of changes for this label: 06_30_00
9132 With a nod and a tip of the hat to the technology of yesteryear,
9133 we've added support in the source code for 80 column output
9134 devices. The code is now mostly constrained to 80 columns or
9135 less to support environments and editors that 1) cannot display
9136 or print more than 80 characters on a single line, and 2) cannot
9137 disable line wrapping.
9139 A major restructuring of the namespace data structure has been
9140 completed. The result is 1) cleaner and more
9141 understandable/maintainable code, and 2) a significant reduction
9142 in the dynamic memory requirement for each named ACPI object
9145 -------------------------------------------
9146 Summary of changes for this label: 06_23_00
9148 Linux support has been added. In order to obtain approval to get
9149 the ACPI CA subsystem into the Linux kernel, we've had to make
9150 quite a few changes to the base subsystem that will affect all
9151 users (all the changes are generic and OS- independent). The
9152 effects of these global changes have been somewhat far reaching.
9153 Files have been merged and/or renamed and interfaces have been
9154 renamed. The major changes are described below.
9156 Osd* interfaces renamed to AcpiOs* to eliminate namespace
9157 pollution/confusion within our target kernels. All OSD
9158 interfaces must be modified to match the new naming convention.
9160 Files merged across the subsystem. A number of the smaller source
9161 and header files have been merged to reduce the file count and
9162 increase the density of the existing files. There are too many
9163 to list here. In general, makefiles that call out individual
9164 files will require rebuilding.
9166 Interpreter files renamed. All interpreter files now have the
9167 prefix am* instead of ie* and is*.
9169 Header files renamed: The acapi.h file is now acpixf.h. The
9170 acpiosd.h file is now acpiosxf.h. We are removing references to
9171 the acronym "API" since it is somewhat windowsy. The new name is
9172 "external interface" or xface or xf in the filenames.j
9175 All manifest constants have been forced to upper case (some were
9176 mixed case.) Also, the string "ACPI_" has been prepended to many
9177 (not all) of the constants, typedefs, and structs.
9179 The globals "DebugLevel" and "DebugLayer" have been renamed
9180 "AcpiDbgLevel" and "AcpiDbgLayer" respectively.
9182 All other globals within the subsystem are now prefixed with
9183 "AcpiGbl_" Internal procedures within the subsystem are now
9184 prefixed with "Acpi" (with only a few exceptions). The original
9185 two-letter abbreviation for the subcomponent remains after "Acpi"
9186 - for example, CmCallocate became AcpiCmCallocate.
9188 Added a source code translation/conversion utility. Used to
9189 generate the Linux source code, it can be modified to generate
9190 other types of source as well. Can also be used to cleanup
9191 existing source by removing extraneous spaces and blank lines.
9192 Found in tools/acpisrc/*
9194 OsdUnMapMemory was renamed to OsdUnmapMemory and then
9195 AcpiOsUnmapMemory. (UnMap became Unmap).
9197 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
9198 When set to one, this indicates that the caller wants to use the
9200 semaphore as a mutex, not a counting semaphore. ACPI CA uses
9201 both types. However, implementers of this call may want to use
9202 different OS primitives depending on the type of semaphore
9203 requested. For example, some operating systems provide separate
9205 "mutex" and "semaphore" interfaces - where the mutex interface is
9206 much faster because it doesn't have all the overhead of a full
9207 semaphore implementation.
9209 Fixed a deadlock problem where a method that accesses the PCI
9210 address space can block forever if it is the first access to the
9213 -------------------------------------------
9214 Summary of changes for this label: 06_02_00
9216 Support for environments that cannot handle unaligned data
9217 accesses (e.g. firmware and OS environments devoid of alignment
9218 handler technology namely SAL/EFI and the IA-64 Linux kernel) has
9219 been added (via configurable macros) in these three areas: -
9220 Transfer of data from the raw AML byte stream is done via byte
9221 moves instead of word/dword/qword moves. - External objects are
9222 aligned within the user buffer, including package elements (sub-
9223 objects). - Conversion of name strings to UINT32 Acpi Names is now
9226 The Store operator was modified to mimic Microsoft's
9227 implementation when storing to a Buffer Field.
9229 Added a check of the BM_STS bit before entering C3.
9231 The methods subdirectory has been obsoleted and removed. A new
9232 file, cmeval.c subsumes the functionality.
9234 A 16-bit (DOS) version of AcpiExec has been developed. The
9235 makefile is under the acpiexec directory.