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28 May 2010. Summary of changes for version 20100528:

This release is available at www.acpica.org/downloads

Note: The ACPI 4.0a specification was released on April 5, 2010 and is

available at www.acpi.info. This is primarily an errata release.

1) ACPI CA Core Subsystem:

Undefined ACPI tables: We are looking for the definitions for the following

ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.

Implemented support to enable multi-byte transfers for Embedded Controller

(EC) operation regions. Previously, the maximum data size passed to the EC

operation region handler was a single byte. There are often EC Fields larger

than one byte that need to be transferred, and it is useful for the EC driver

to lock these as a single transaction. This change enables single transfers

larger than 8 bits. This effectively changes the access to the EC space from

ByteAcc to AnyAcc, and will probably require changes to the host OS Embedded

Controller driver to enable 16/32/64/256-bit transfers in addition to 8-bit

transfers. Alexey Starikovskiy, Lin Ming

Implemented a performance enhancement for namespace search and access. This

change enhances the performance of namespace searches and walks by adding a

backpointer to the parent in each namespace node. On large namespaces, this

change can improve overall ACPI performance by up to 9X. Adding a pointer to

each namespace node increases the overall size of the internal namespace by

about 5%, since each namespace entry usually consists of both a namespace

node and an ACPI operand object. However, this is the first growth of the

namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.

Implemented a performance optimization that reduces the number of namespace

walks. On control method exit, only walk the namespace if the method is known

to have created namespace objects outside of its local scope. Previously, the

entire namespace was traversed on each control method exit. This change can

improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob Moore.

Added support to truncate I/O addresses to 16 bits for Windows compatibility.

Some ASL code has been seen in the field that inadvertently has bits set

above bit 15. This feature is optional and is enabled if the BIOS requests

any Windows OSI strings. It can also be enabled by the host OS. Matthew

Garrett, Bob Moore.

Added support to limit the maximum time for the ASL Sleep() operator. To

prevent accidental deep sleeps, limit the maximum time that Sleep() will

actually sleep. Configurable, the default maximum is two seconds. ACPICA

bugzilla 854.

Added run-time validation support for the _WDG and_WED Microsoft predefined

methods. These objects are defined by "Windows Instrumentation", and are not

part of the ACPI spec. ACPICA BZ 860.

Expanded all statistic counters used during namespace and device

initialization from 16 to 32 bits in order to support very large namespaces.

Replaced all instances of %d in printf format specifiers with %u since nearly

all integers in ACPICA are unsigned.

Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly returned

as AE_NO_HANDLER.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total

    Debug Version:     164.2K Code, 51.5K Data, 215.7K Total

  Current Release:

    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total

    Debug Version:     164.1K Code, 51.5K Data, 215.6K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Added compiler support for the _WDG and_WED Microsoft predefined

methods. These objects are defined by "Windows Instrumentation", and are not

part of the ACPI spec. ACPICA BZ 860.

AcpiExec: added option to disable the memory tracking mechanism. The -dt

option will disable the tracking mechanism, which improves performance

considerably.

AcpiExec: Restructured the command line options into -d (disable) and -e

(enable) options.

----------------------------------------

28 April 2010. Summary of changes for version 20100428:

1) ACPI CA Core Subsystem:

Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,

including FADT-based and GPE Block Devices, execute any _PRW methods in the

new table, and process any _Lxx/_Exx GPE methods in the new table. Any

runtime GPE that is referenced by an _Lxx/_Exx method in the new table is

immediately enabled. Handles the FADT-defined GPEs as well as GPE Block

Devices. Provides compatibility with other ACPI implementations. Two new

files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob Moore.

Fixed a regression introduced in version 20100331 within the table manager

where initial table loading could fail. This was introduced in the fix for

AcpiReallocateRootTable. Also, renamed some of fields in the table manager

data structures to clarify their meaning and use.

Fixed a possible allocation overrun during internal object copy in

AcpiUtCopySimpleObject. The original code did not correctly handle the case

where the object to be copied was a namespace node. Lin Ming. ACPICA BZ 847.

Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a

possible access beyond end-of-allocation. Also, now fully validate descriptor

(size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total

    Debug Version:     163.5K Code, 51.3K Data, 214.8K Total

  Current Release:

    Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total

    Debug Version:     164.2K Code, 51.5K Data, 215.7K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented Min/Max/Len/Gran validation for address resource

descriptors. This change implements validation for the address fields that

are common to all address-type resource descriptors. These checks are

implemented: Checks for valid Min/Max, length within the Min/Max window,

valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as per

table 6-40 in the ACPI 4.0a specification. Also split the large aslrestype1.c

and aslrestype2.c files into five new files. ACPICA BZ 840.

iASL: Added support for the _Wxx predefined names. This support was missing

and these names were not recognized by the compiler as valid predefined

names. ACPICA BZ 851.

iASL: Added an error for all predefined names that are defined to return no

value and thus must be implemented as Control Methods. These include all of

the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous

names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.

iASL: Implemented the -ts option to emit hex AML data in ASL format, as an

ASL Buffer. Allows ACPI tables to be easily included within ASL files, to be

dynamically loaded via the Load() operator. Also cleaned up output for the -

ta and -tc options. ACPICA BZ 853.

Tests: Added a new file with examples of extended iASL error checking.

Demonstrates the advanced error checking ability of the iASL compiler.

Available at tests/misc/badcode.asl.

----------------------------------------

31 March 2010. Summary of changes for version 20100331:

1) ACPI CA Core Subsystem:

Completed a major update for the GPE support in order to improve support for

shared GPEs and to simplify both host OS and ACPICA code. Added a reference

count mechanism to support shared GPEs that require multiple device drivers.

Several external interfaces have changed. One external interface has been

removed. One new external interface was added. Most of the GPE external

interfaces now use the GPE spinlock instead of the events mutex (and the

Flags parameter for many GPE interfaces has been removed.) See the updated

ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore, Rafael

Wysocki. ACPICA BZ 831.

Changed:

    AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus

Removed:

    AcpiSetGpeType

New:

    AcpiSetGpe

Implemented write support for DataTable operation regions. These regions are

defined via the DataTableRegion() operator. Previously, only read support was

implemented. The ACPI specification allows DataTableRegions to be read/write,

however.

Implemented a new subsystem option to force a copy of the DSDT to local

memory. Optionally copy the entire DSDT to local memory (instead of simply

mapping it.) There are some (albeit very rare) BIOSs that corrupt or replace

the original DSDT, creating the need for this option. Default is FALSE, do

not copy the DSDT.

Implemented detection of a corrupted or replaced DSDT. This change adds

support to detect a DSDT that has been corrupted and/or replaced from outside

the OS (by firmware). This is typically catastrophic for the system, but has

been seen on some machines. Once this problem has been detected, the DSDT

copy option can be enabled via system configuration. Lin Ming, Bob Moore.

Fixed two problems with AcpiReallocateRootTable during the root table copy.

When copying the root table to the new allocation, the length used was

incorrect. The new size was used instead of the current table size, meaning

too much data was copied. Also, the count of available slots for ACPI tables

was not set correctly. Alexey Starikovskiy, Bob Moore.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total

    Debug Version:     163.4K Code, 51.1K Data, 214.5K Total

  Current Release:

    Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total

    Debug Version:     163.5K Code, 51.3K Data, 214.8K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implement limited typechecking for values returned from predefined

control methods. The type of any returned static (unnamed) object is now

validated. For example, Return(1). ACPICA BZ 786.

iASL: Fixed a predefined name object verification regression. Fixes a problem

introduced in version 20100304. An error is incorrectly generated if a

predefined name is declared as a static named object with a value defined

using the keywords "Zero", "One", or "Ones". Lin Ming.

iASL: Added Windows 7 support for the -g option (get local ACPI tables) by

reducing the requested registry access rights. ACPICA BZ 842.

Disassembler: fixed a possible fault when generating External() statements.

Introduced in commit ae7d6fd: Properly handle externals with parent-prefix

(carat). Fixes a string length allocation calculation. Lin Ming.

----------------------------------------

04 March 2010. Summary of changes for version 20100304:

1) ACPI CA Core Subsystem:

Fixed a possible problem with the AML Mutex handling function

AcpiExReleaseMutex where the function could fault under the very rare

condition when the interpreter has blocked, the interpreter lock is released,

the interpreter is then reentered via the same thread, and attempts to

acquire an AML mutex that was previously acquired. FreeBSD report 140979. Lin

Ming.

Implemented additional configuration support for the AML "Debug Object".

Output from the debug object can now be enabled via a global variable,

AcpiGbl_EnableAmlDebugObject. This will assist with remote machine debugging.

This debug output is now available in the release version of ACPICA instead

of just the debug version. Also, the entire debug output module can now be

configured out of the ACPICA build if desired. One new file added,

executer/exdebug.c. Lin Ming, Bob Moore.

Added header support for the ACPI MCHI table (Management Controller Host

Interface Table). This table was added in ACPI 4.0, but the defining document

has only recently become available.

Standardized output of integer values for ACPICA warnings/errors. Always use

0x prefix for hex output, always use %u for unsigned integer decimal output.

Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about 400

invocations.) These invocations were converted from the original

ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total

    Debug Version:     163.5K Code, 50.9K Data, 214.4K Total

  Current Release:

    Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total

    Debug Version:     163.4K Code, 51.1K Data, 214.5K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented typechecking support for static (non-control method)

predefined named objects that are declared with the Name() operator. For

example, the type of this object is now validated to be of type Integer:

Name(_BBN, 1). This change migrates the compiler to using the core predefined

name table instead of maintaining a local version. Added a new file,

aslpredef.c. ACPICA BZ 832.

Disassembler: Added support for the ACPI 4.0 MCHI table.

----------------------------------------

21 January 2010. Summary of changes for version 20100121:

1) ACPI CA Core Subsystem:

Added the 2010 copyright to all module headers and signons. This affects

virtually every file in the ACPICA core subsystem, the iASL compiler, the

tools/utilities, and the test suites.

Implemented a change to the AcpiGetDevices interface to eliminate unnecessary

invocations of the _STA method. In the case where a specific _HID is

requested, do not run _STA until a _HID match is found. This eliminates

potentially dozens of _STA calls during a search for a particular device/HID,

which in turn can improve boot times. ACPICA BZ 828. Lin Ming.

Implemented an additional repair for predefined method return values. Attempt

to repair unexpected NULL elements within returned Package objects. Create an

Integer of value zero, a NULL String, or a zero-length Buffer as appropriate.

ACPICA BZ 818. Lin Ming, Bob Moore.

Removed the obsolete ACPI_INTEGER data type. This type was introduced as the

code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0 (with

64-bit AML integers). It is now obsolete and this change removes it from the

ACPICA code base, replaced by UINT64. The original typedef has been retained

for now for compatibility with existing device driver code. ACPICA BZ 824.

Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field in

the parse tree object.

Added additional warning options for the gcc-4 generation. Updated the source

accordingly. This includes some code restructuring to eliminate unreachable

code, elimination of some gotos, elimination of unused return values, some

additional casting, and removal of redundant declarations.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  87.0K Code, 18.0K Data, 105.0K Total

    Debug Version:     163.4K Code, 50.8K Data, 214.2K Total

  Current Release:

    Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total

    Debug Version:     163.5K Code, 50.9K Data, 214.4K Total

2) iASL Compiler/Disassembler and Tools:

No functional changes for this release.

----------------------------------------

14 December 2009. Summary of changes for version 20091214:

1) ACPI CA Core Subsystem:

Enhanced automatic data type conversions for predefined name repairs. This

change expands the automatic repairs/conversions for predefined name return

values to make Integers, Strings, and Buffers fully interchangeable. Also, a

Buffer can be converted to a Package of Integers if necessary. The nsrepair.c

module was completely restructured. Lin Ming, Bob Moore.

Implemented automatic removal of null package elements during predefined name

repairs. This change will automatically remove embedded and trailing NULL

package elements from returned package objects that are defined to contain a

variable number of sub-packages. The driver is then presented with a package

with no null elements to deal with. ACPICA BZ 819.

Implemented a repair for the predefined _FDE and _GTM names. The expected

return value for both names is a Buffer of 5 DWORDs. This repair fixes two

possible problems (both seen in the field), where a package of integers is

returned, or a buffer of BYTEs is returned. With assistance from Jung-uk Kim.

Implemented additional module-level code support. This change will properly

execute module-level code that is not at the root of the namespace (under a

Device object, etc.). Now executes the code within the current scope instead

of the root. ACPICA BZ 762. Lin Ming.

Fixed possible mutex acquisition errors when running _REG methods. Fixes a

problem where mutex errors can occur when running a _REG method that is in

the same scope as a method-defined operation region or an operation region

under a module-level IF block. This type of code is rare, so the problem has

not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.

Fixed a possible memory leak during module-level code execution. An object

could be leaked for each block of executed module-level code if the

interpreter slack mode is enabled This change deletes any implicitly returned

object from the module-level code block. Lin Ming.

Removed messages for successful predefined repair(s). The repair mechanism

was considered too wordy. Now, messages are only unconditionally emitted if

the return object cannot be repaired. Existing messages for successful

repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ 827.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  86.6K Code, 18.2K Data, 104.8K Total

    Debug Version:     162.7K Code, 50.8K Data, 213.5K Total

  Current Release:

    Non-Debug Version:  87.0K Code, 18.0K Data, 105.0K Total

    Debug Version:     163.4K Code, 50.8K Data, 214.2K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Fixed a regression introduced in 20091112 where intermediate .SRC files

were no longer automatically removed at the termination of the compile.

acpiexec: Implemented the -f option to specify default region fill value.

This option specifies the value used to initialize buffers that simulate

operation regions. Default value is zero. Useful for debugging problems that

depend on a specific initial value for a region or field.

----------------------------------------

12 November 2009. Summary of changes for version 20091112:

1) ACPI CA Core Subsystem:

Implemented a post-order callback to AcpiWalkNamespace. The existing

interface only has a pre-order callback. This change adds an additional

parameter for a post-order callback which will be more useful for bus scans.

ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.

Modified the behavior of the operation region memory mapping cache for

SystemMemory. Ensure that the memory mappings created for operation regions

do not cross 4K page boundaries. Crossing a page boundary while mapping

regions can cause kernel warnings on some hosts if the pages have different

attributes. Such regions are probably BIOS bugs, and this is the workaround.

Linux BZ 14445. Lin Ming.

Implemented an automatic repair for predefined methods that must return

sorted lists. This change will repair (by sorting) packages returned by _ALR,

_PSS, and _TSS. Drivers can now assume that the packages are correctly sorted

and do not contain NULL package elements. Adds one new file,

namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.

Fixed a possible fault during predefined name validation if a return Package

object contains NULL elements. Also adds a warning if a NULL element is

followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement may

include repair or removal of all such NULL elements where possible.

Implemented additional module-level executable AML code support. This change

will execute module-level code that is not at the root of the namespace

(under a Device object, etc.) at table load time. Module-level executable AML

code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.

Implemented a new internal function to create Integer objects. This function

simplifies miscellaneous object creation code. ACPICA BZ 823.

Reduced the severity of predefined repair messages, Warning to Info. Since

the object was successfully repaired, a warning is too severe. Reduced to an

info message for now. These messages may eventually be changed to debug-only.

ACPICA BZ 812.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  85.8K Code, 18.0K Data, 103.8K Total

    Debug Version:     161.8K Code, 50.6K Data, 212.4K Total

  Current Release:

    Non-Debug Version:  86.6K Code, 18.2K Data, 104.8K Total

    Debug Version:     162.7K Code, 50.8K Data, 213.5K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented Switch() with While(1) so that Break works correctly. This

change correctly implements the Switch operator with a surrounding While(1)

so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.

iASL: Added a message if a package initializer list is shorter than package

length. Adds a new remark for a Package() declaration if an initializer list

exists, but is shorter than the declared length of the package. Although

technically legal, this is probably a coding error and it is seen in the

field. ACPICA BZ 815. Lin Ming, Bob Moore.

iASL: Fixed a problem where the compiler could fault after the maximum number

of errors was reached (200).

acpixtract: Fixed a possible warning for pointer cast if the compiler warning

level set very high.

----------------------------------------

13 October 2009. Summary of changes for version 20091013:

1) ACPI CA Core Subsystem:

Fixed a problem where an Operation Region _REG method could be executed more

than once. If a custom address space handler is installed by the host before

the "initialize operation regions" phase of the ACPICA initialization, any

_REG methods for that address space could be executed twice. This change

fixes the problem. ACPICA BZ 427. Lin Ming.

Fixed a possible memory leak for the Scope() ASL operator. When the exact

invocation of "Scope(\)" is executed (change scope to root), one internal

operand object was leaked. Lin Ming.

Implemented a run-time repair for the _MAT predefined method. If the _MAT

return value is defined as a Field object in the AML, and the field

size is less than or equal to the default width of an integer (32 or 64),_MAT

can incorrectly return an Integer instead of a Buffer. ACPICA now

automatically repairs this problem. ACPICA BZ 810.

Implemented a run-time repair for the _BIF and _BIX predefined methods. The

"OEM Information" field is often incorrectly returned as an Integer with

value zero if the field is not supported by the platform. This is due to an

ambiguity in the ACPI specification. The field should always be a string.

ACPICA now automatically repairs this problem by returning a NULL string

within the returned Package. ACPICA BZ 807.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  85.6K Code, 18.0K Data, 103.6K Total

    Debug Version:     161.7K Code, 50.9K Data, 212.6K Total

  Current Release:

    Non-Debug Version:  85.8K Code, 18.0K Data, 103.8K Total

    Debug Version:     161.8K Code, 50.6K Data, 212.4K Total

2) iASL Compiler/Disassembler and Tools:

Disassembler: Fixed a problem where references to external symbols that

contained one or more parent-prefixes (carats) were not handled correctly,

possibly causing a fault. ACPICA BZ 806. Lin Ming.

Disassembler: Restructured the code so that all functions that handle

external symbols are in a single module. One new file is added,

common/dmextern.c.

AML Debugger: Added a max count argument for the Batch command (which

executes multiple predefined methods within the namespace.)

iASL: Updated the compiler documentation (User Reference.) Available at

http://www.acpica.org/documentation/. ACPICA BZ 750.

AcpiXtract: Updated for Lint and other formatting changes. Close all open

files.

----------------------------------------

03 September 2009. Summary of changes for version 20090903:

1) ACPI CA Core Subsystem:

For Windows Vista compatibility, added the automatic execution of an _INI

method located at the namespace root (\_INI). This method is executed at

table load time. This support is in addition to the automatic execution of

\_SB._INI. Lin Ming.

Fixed a possible memory leak in the interpreter for AML package objects if

the package initializer list is longer than the defined size of the package.

This apparently can only happen if the BIOS changes the package size on the

fly (seen in a _PSS object), as ASL compilers do not allow this. The

interpreter will truncate the package to the defined size (and issue an error

message), but previously could leave the extra objects undeleted if they were

pre-created during the argument processing (such is the case if the package

consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.

Fixed a problem seen when a Buffer or String is stored to itself via ASL.

This has been reported in the field. Previously, ACPICA would zero out the

buffer/string. Now, the operation is treated as a noop. Provides Windows

compatibility. ACPICA BZ 803. Lin Ming.

Removed an extraneous error message for ASL constructs of the form

Store(LocalX,LocalX) when LocalX is uninitialized. These curious statements

are seen in many BIOSs and are once again treated as NOOPs and no error is

emitted when they are encountered. ACPICA BZ 785.

Fixed an extraneous warning message if a _DSM reserved method returns a

Package object. _DSM can return any type of object, so validation on the

return type cannot be performed. ACPICA BZ 802.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  85.5K Code, 18.0K Data, 103.5K Total

    Debug Version:     161.6K Code, 50.9K Data, 212.5K Total

  Current Release:

    Non-Debug Version:  85.6K Code, 18.0K Data, 103.6K Total

    Debug Version:     161.7K Code, 50.9K Data, 212.6K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Fixed a problem with the use of the Alias operator and Resource

Templates. The correct alias is now constructed and no error is emitted.

ACPICA BZ 738.

iASL: Implemented the -I option to specify additional search directories for

include files. Allows multiple additional search paths for include files.

Directories are searched in the order specified on the command line (after

the local directory is searched.) ACPICA BZ 800.

iASL: Fixed a problem where the full pathname for include files was not

emitted for warnings/errors. This caused the IDE support to not work

properly. ACPICA BZ 765.

iASL: Implemented the -@ option to specify a Windows-style response file

containing additional command line options. ACPICA BZ 801.

AcpiExec: Added support to load multiple AML files simultaneously (such as a

DSDT and multiple SSDTs). Also added support for wildcards within the AML

pathname. These features allow all machine tables to be easily loaded and

debugged together. ACPICA BZ 804.

Disassembler: Added missing support for disassembly of HEST table Error Bank

subtables.

----------------------------------------

30 July 2009. Summary of changes for version 20090730:

The ACPI 4.0 implementation for ACPICA is complete with this release.

1) ACPI CA Core Subsystem:

ACPI 4.0: Added header file support for all new and changed ACPI tables.

Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are new

for ACPI 4.0, but have previously been supported in ACPICA are: CPEP, BERT,

EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT. There

have been some ACPI 4.0 changes to other existing tables. Split the large

actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.

ACPI 4.0: Implemented predefined name validation for all new names. There are

31 new names in ACPI 4.0. The predefined validation module was split into two

files. The new file is namespace/nsrepair.c. ACPICA BZ 770.

Implemented support for so-called "module-level executable code". This is

executable AML code that exists outside of any control method and is intended

to be executed at table load time. Although illegal since ACPI 2.0, this type

of code still exists and is apparently still being created. Blocks of this

code are now detected and executed as intended. Currently, the code blocks

must exist under either an If, Else, or While construct; these are the

typical cases seen in the field. ACPICA BZ 762. Lin Ming.

Implemented an automatic dynamic repair for predefined names that return

nested Package objects. This applies to predefined names that are defined to

return a variable-length Package of sub-packages. If the number of sub-

packages is one, BIOS code is occasionally seen that creates a simple single

package with no sub-packages. This code attempts to fix the problem by

wrapping a new package object around the existing package. These methods can

be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA BZ

790.

Fixed a regression introduced in 20090625 for the AcpiGetDevices interface.

The _HID/_CID matching was broken and no longer matched IDs correctly. ACPICA

BZ 793.

Fixed a problem with AcpiReset where the reset would silently fail if the

register was one of the protected I/O ports. AcpiReset now bypasses the port

validation mechanism. This may eventually be driven into the AcpiRead/Write

interfaces.

Fixed a regression related to the recent update of the AcpiRead/Write

interfaces. A sleep/suspend could fail if the optional PM2 Control register

does not exist during an attempt to write the Bus Master Arbitration bit.

(However, some hosts already delete the code that writes this bit, and the

code may in fact be obsolete at this date.) ACPICA BZ 799.

Fixed a problem where AcpiTerminate could fault if inadvertently called twice

in succession. ACPICA BZ 795.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  84.7K Code, 17.8K Data, 102.5K Total

    Debug Version:     160.5K Code, 50.6K Data, 211.1K Total

  Current Release:

    Non-Debug Version:  85.5K Code, 18.0K Data, 103.5K Total

    Debug Version:     161.6K Code, 50.9K Data, 212.5K Total

2) iASL Compiler/Disassembler and Tools:

ACPI 4.0: Implemented disassembler support for all new ACPI tables and

changes to existing tables. ACPICA BZ 775.

----------------------------------------

25 June 2009. Summary of changes for version 20090625:

The ACPI 4.0 Specification was released on June 16 and is available at

www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will

continue for the next few releases.

1) ACPI CA Core Subsystem:

ACPI 4.0: Implemented interpreter support for the IPMI operation region

address space. Includes support for bi-directional data buffers and an IPMI

address space handler (to be installed by an IPMI device driver.) ACPICA BZ

773. Lin Ming.

ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT. Includes

support in both the header files and the disassembler.

Completed a major update for the AcpiGetObjectInfo external interface.

Changes include:

 - Support for variable, unlimited length HID, UID, and CID strings.

 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA, etc.)

 - Call the _SxW power methods on behalf of a device object.

 - Determine if a device is a PCI root bridge.

 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.

These changes will require an update to all callers of this interface. See

the updated ACPICA Programmer Reference for details. One new source file has

been added - utilities/utids.c. ACPICA BZ 368, 780.

Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit

transfers. The Value parameter has been extended from 32 bits to 64 bits in

order to support new ACPI 4.0 tables. These changes will require an update to

all callers of these interfaces. See the ACPICA Programmer Reference for

details. ACPICA BZ 768.

Fixed several problems with AcpiAttachData. The handler was not invoked when

the host node was deleted. The data sub-object was not automatically deleted

when the host node was deleted. The interface to the handler had an unused

parameter, this was removed. ACPICA BZ 778.

Enhanced the function that dumps ACPI table headers. All non-printable

characters in the string fields are now replaced with '?' (Signature, OemId,

OemTableId, and CompilerId.) ACPI tables with non-printable characters in

these fields are occasionally seen in the field. ACPICA BZ 788.

Fixed a problem with predefined method repair code where the code that

attempts to repair/convert an object of incorrect type is only executed on

the first time the predefined method is called. The mechanism that disables

warnings on subsequent calls was interfering with the repair mechanism.

ACPICA BZ 781.

Fixed a possible memory leak in the predefined validation/repair code when a

buffer is automatically converted to an expected string object.

Removed obsolete 16-bit files from the distribution and from the current git

tree head. ACPICA BZ 776.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  83.4K Code, 17.5K Data, 100.9K Total

    Debug Version:     158.9K Code, 50.0K Data, 208.9K Total

  Current Release:

    Non-Debug Version:  84.7K Code, 17.8K Data, 102.5K Total

    Debug Version:     160.5K Code, 50.6K Data, 211.1K Total

2) iASL Compiler/Disassembler and Tools:

ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI

operation region keyword. ACPICA BZ 771, 772. Lin Ming.

ACPI 4.0: iASL - implemented compile-time validation support for all new

predefined names and control methods (31 total). ACPICA BZ 769.

----------------------------------------

21 May 2009. Summary of changes for version 20090521:

1) ACPI CA Core Subsystem:

Disabled the preservation of the SCI enable bit in the PM1 control register.

The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification to be

a "preserved" bit - "OSPM always preserves this bit position", section

4.7.3.2.1. However, some machines fail if this bit is in fact preserved

because the bit needs to be explicitly set by the OS as a workaround. No

machines fail if the bit is not preserved. Therefore, ACPICA no longer

attempts to preserve this bit.

Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or

incorrectly formed _PRT package could cause a fault. Added validation to

ensure that each package element is actually a sub-package.

Implemented a new interface to install or override a single control method,

AcpiInstallMethod. This interface is useful when debugging in order to repair

an existing method or to install a missing method without having to override

the entire ACPI table. See the ACPICA Programmer Reference for use and

examples. Lin Ming, Bob Moore.

Fixed several reference count issues with the DdbHandle object that is

created from a Load or LoadTable operator. Prevent premature deletion of the

object. Also, mark the object as invalid once the table has been unloaded.

This is needed because the handle itself may not be deleted after the table

unload, depending on whether it has been stored in a named object by the

caller. Lin Ming.

Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple

mutexes of the same sync level are acquired but then not released in strict

opposite order, the internally maintained Current Sync Level becomes confused

and can cause subsequent execution errors. ACPICA BZ 471.

Changed the allowable release order for ASL mutex objects. The ACPI 4.0

specification has been changed to make the SyncLevel for mutex objects more

useful. When releasing a mutex, the SyncLevel of the mutex must now be the

same as the current sync level. This makes more sense than the previous rule

(SyncLevel less than or equal). This change updates the code to match the

specification.

Fixed a problem with the local version of the AcpiOsPurgeCache function. The

(local) cache must be locked during all cache object deletions. Andrew

Baumann.

Updated the Load operator to use operation region interfaces. This replaces

direct memory mapping with region access calls. Now, all region accesses go

through the installed region handler as they should.

Simplified and optimized the NsGetNextNode function. Reduced parameter count

and reduced code for this frequently used function.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  82.8K Code, 17.5K Data, 100.3K Total

    Debug Version:     158.0K Code, 49.9K Data, 207.9K Total

  Current Release:

    Non-Debug Version:  83.4K Code, 17.5K Data, 100.9K Total

    Debug Version:     158.9K Code, 50.0K Data, 208.9K Total

2) iASL Compiler/Disassembler and Tools:

Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some problems

with sub-table disassembly and handling invalid sub-tables. Attempt recovery

after an invalid sub-table ID.

----------------------------------------

22 April 2009. Summary of changes for version 20090422:

1) ACPI CA Core Subsystem:

Fixed a compatibility issue with the recently released I/O port protection

mechanism. For windows compatibility, 1) On a port protection violation,

simply ignore the request and do not return an exception (allow the control

method to continue execution.) 2) If only part of the request overlaps a

protected port, read/write the individual ports that are not protected. Linux

BZ 13036. Lin Ming

Enhanced the execution of the ASL/AML BreakPoint operator so that it actually

breaks into the AML debugger if the debugger is present. This matches the

ACPI-defined behavior.

Fixed several possible warnings related to the use of the configurable

ACPI_THREAD_ID. This type can now be configured as either an integer or a

pointer with no warnings. Also fixes several warnings in printf-like

statements for the 64-bit build when the type is configured as a pointer.

ACPICA BZ 766, 767.

Fixed a number of possible warnings when compiling with gcc 4+ (depending on

warning options.) Examples include printf formats, aliasing, unused globals,

missing prototypes, missing switch default statements, use of non-ANSI

library functions, use of non-ANSI constructs. See generate/unix/Makefile for

a list of warning options used with gcc 3 and 4. ACPICA BZ 735.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  82.6K Code, 17.6K Data, 100.2K Total

    Debug Version:     157.7K Code, 49.9K Data, 207.6K Total

  Current Release:

    Non-Debug Version:  82.8K Code, 17.5K Data, 100.3K Total

    Debug Version:     158.0K Code, 49.9K Data, 207.9K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Fixed a generation warning from Bison 2.3 and fixed several warnings on

the 64-bit build.

iASL: Fixed a problem where the Unix/Linux versions of the compiler could not

correctly digest Windows/DOS formatted files (with CR/LF).

iASL: Added a new option for "quiet mode" (-va) that produces only the

compilation summary, not individual errors and warnings. Useful for large

batch compilations.

AcpiExec: Implemented a new option (-z) to enable a forced semaphore/mutex

timeout that can be used to detect hang conditions during execution of AML

code (includes both internal semaphores and AML-defined mutexes and events.)

Added new makefiles for the generation of acpica in a generic unix-like

environment. These makefiles are intended to generate the acpica tools and

utilities from the original acpica git source tree structure.

Test Suites: Updated and cleaned up the documentation files. Updated the

copyrights to 2009, affecting all source files. Use the new version of iASL

with quiet mode. Increased the number of available semaphores in the Windows

OSL, allowing the aslts to execute fully on Windows. For the Unix OSL, added

an alternate implementation of the semaphore timeout to allow aslts to

execute fully on Cygwin.

----------------------------------------

20 March 2009. Summary of changes for version 20090320:

1) ACPI CA Core Subsystem:

Fixed a possible race condition between AcpiWalkNamespace and dynamic table

unloads. Added a reader/writer locking mechanism to allow multiple concurrent

namespace walks (readers), but block a dynamic table unload until it can gain

exclusive write access to the namespace. This fixes a problem where a table

unload could (possibly catastrophically) delete the portion of the namespace

that is currently being examined by a walk. Adds a new file, utlock.c, that

implements the reader/writer lock mechanism. ACPICA BZ 749.

Fixed a regression introduced in version 20090220 where a change to the FADT

handling could cause the ACPICA subsystem to access non-existent I/O ports.

Modified the handling of FADT register and table (FACS/DSDT) addresses. The

FADT can contain both 32-bit and 64-bit versions of these addresses.

Previously, the 64-bit versions were favored, meaning that if both 32 and 64

versions were valid, but not equal, the 64-bit version was used. This was

found to cause some machines to fail. Now, in this case, the 32-bit version

is used instead. This now matches the Windows behavior.

Implemented a new mechanism to protect certain I/O ports. Provides Microsoft

compatibility and protects the standard PC I/O ports from access via AML

code. Adds a new file, hwvalid.c

Fixed a possible extraneous warning message from the FADT support. The

message warns of a 32/64 length mismatch between the legacy and GAS

definitions for a register.

Removed the obsolete AcpiOsValidateAddress OSL interface. This interface is

made obsolete by the port protection mechanism above. It was previously used

to validate the entire address range of an operation region, which could be

incorrect if the range included illegal ports, but fields within the

operation region did not actually access those ports. Validation is now

performed on a per-field basis instead of the entire region.

Modified the handling of the PM1 Status Register ignored bit (bit 11.)

Ignored bits must be "preserved" according to the ACPI spec. Usually, this

means a read/modify/write when writing to the register. However, for status

registers, writing a one means clear the event. Writing a zero means preserve

the event (do not clear.) This behavior is clarified in the ACPI 4.0 spec,

and the ACPICA code now simply always writes a zero to the ignored bit.

Modified the handling of ignored bits for the PM1 A/B Control Registers. As

per the ACPI specification, for the control registers, preserve

(read/modify/write) all bits that are defined as either reserved or ignored.

Updated the handling of write-only bits in the PM1 A/B Control Registers.

When reading the register, zero the write-only bits as per the ACPI spec.

ACPICA BZ 443. Lin Ming.

Removed "Linux" from the list of supported _OSI strings. Linux no longer

wants to reply true to this request. The Windows strings are the only paths

through the AML that are tested and known to work properly.

  Previous Release:

    Non-Debug Version:  82.0K Code, 17.5K Data,  99.5K Total

    Debug Version:     156.9K Code, 49.8K Data, 206.7K Total

  Current Release:

    Non-Debug Version:  82.6K Code, 17.6K Data, 100.2K Total

    Debug Version:     157.7K Code, 49.9K Data, 207.6K Total

2) iASL Compiler/Disassembler and Tools:

Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c and

aetables.c

----------------------------------------

20 February 2009. Summary of changes for version 20090220:

1) ACPI CA Core Subsystem:

Optimized the ACPI register locking. Removed locking for reads from the ACPI

bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is

not required when reading the single-bit registers. The

AcpiGetRegisterUnlocked function is no longer needed and has been removed.

This will improve performance for reads on these registers. ACPICA BZ 760.

Fixed the parameter validation for AcpiRead/Write. Now return

AE_BAD_PARAMETER if the input register pointer is null, and AE_BAD_ADDRESS if

the register has an address of zero. Previously, these cases simply returned

AE_OK. For optional registers such as PM1B status/enable/control, the caller

should check for a valid register address before calling. ACPICA BZ 748.

Renamed the external ACPI bit register access functions. Renamed

AcpiGetRegister and AcpiSetRegister to clarify the purpose of these

functions. The new names are AcpiReadBitRegister and AcpiWriteBitRegister.

Also, restructured the code for these functions by simplifying the code path

and condensing duplicate code to reduce code size.

Added new functions to transparently handle the possibly split PM1 A/B

registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two functions

now handle the split registers for PM1 Status, Enable, and Control. ACPICA BZ

746.

Added a function to handle the PM1 control registers, AcpiHwWritePm1Control.

This function writes both of the PM1 control registers (A/B). These registers

are different than the PM1 A/B status and enable registers in that different

values can be written to the A/B registers. Most notably, the SLP_TYP bits

can be different, as per the values returned from the _Sx predefined methods.

Removed an extra register write within AcpiHwClearAcpiStatus. This function

was writing an optional PM1B status register twice. The existing call to the

low-level AcpiHwRegisterWrite automatically handles a possibly split PM1 A/B

register. ACPICA BZ 751.

Split out the PM1 Status registers from the FADT. Added new globals for these

registers (A/B), similar to the way the PM1 Enable registers are handled.

Instead of overloading the FADT Event Register blocks. This makes the code

clearer and less prone to error.

Fixed the warning message for when the platform contains too many ACPI tables

for the default size of the global root table data structure. The calculation

for the truncation value was incorrect.

Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this

obsolete macro, since it is now a simple reference to ->common.type. There

were about 150 invocations of the macro across 41 files. ACPICA BZ 755.

Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as

TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to

simply SLEEP_TYPE. ACPICA BZ 754.

Conditionally compile the AcpiSetFirmwareWakingVector64 function. This

function is only needed on 64-bit host operating systems and is thus not

included for 32-bit hosts.

Debug output: print the input and result for invocations of the _OSI reserved

control method via the ACPI_LV_INFO debug level. Also, reduced some of the

verbosity of this debug level. Len Brown.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  82.3K Code, 17.5K Data,  99.8K Total

    Debug Version:     157.3K Code, 49.8K Data, 207.1K Total

  Current Release:

    Non-Debug Version:  82.0K Code, 17.5K Data,  99.5K Total

    Debug Version:     156.9K Code, 49.8K Data, 206.7K Total

2) iASL Compiler/Disassembler and Tools:

Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the

various legal performance profiles.

----------------------------------------

23 January 2009. Summary of changes for version 20090123:

1) ACPI CA Core Subsystem:

Added the 2009 copyright to all module headers and signons. This affects

virtually every file in the ACPICA core subsystem, the iASL compiler, and

the tools/utilities.

Implemented a change to allow the host to override any ACPI table, including

dynamically loaded tables. Previously, only the DSDT could be replaced by the

host. With this change, the AcpiOsTableOverride interface is called for each

table found in the RSDT/XSDT during ACPICA initialization, and also whenever

a table is dynamically loaded via the AML Load operator.

Updated FADT flag definitions, especially the Boot Architecture flags.

Debugger: For the Find command, automatically pad the input ACPI name with

underscores if the name is shorter than 4 characters. This enables a match

with the actual namespace entry which is itself padded with underscores.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  82.3K Code, 17.4K Data,  99.7K Total

    Debug Version:     157.1K Code, 49.7K Data, 206.8K Total

  Current Release:

    Non-Debug Version:  82.3K Code, 17.5K Data,  99.8K Total

    Debug Version:     157.3K Code, 49.8K Data, 207.1K Total

2) iASL Compiler/Disassembler and Tools:

Fix build error under Bison-2.4.

Dissasembler: Enhanced FADT support. Added decoding of the Boot Architecture

flags. Now decode all flags, regardless of the FADT version. Flag output

includes the FADT version which first defined each flag.

The iASL -g option now dumps the RSDT to a file (in addition to the FADT and

DSDT). Windows only.

----------------------------------------

04 December 2008. Summary of changes for version 20081204:

1) ACPI CA Core Subsystem:

The ACPICA Programmer Reference has been completely updated and revamped for

this release. This includes updates to the external interfaces, OSL

interfaces, the overview sections, and the debugger reference.

Several new ACPICA interfaces have been implemented and documented in the

programmer reference:

AcpiReset - Writes the reset value to the FADT-defined reset register.

AcpiDisableAllGpes - Disable all available GPEs.

AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.

AcpiGetGpeDevice - Get the GPE block device associated with a GPE.

AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.

AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)

AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)

Most of the public ACPI hardware-related interfaces have been moved to a new

file, components/hardware/hwxface.c

Enhanced the FADT parsing and low-level ACPI register access: The ACPI

register lengths within the FADT are now used, and the low level ACPI

register access no longer hardcodes the ACPI register lengths. Given that

there may be some risk in actually trusting the FADT register lengths, a run-

time option was added to fall back to the default hardcoded lengths if the

FADT proves to contain incorrect values - UseDefaultRegisterWidths. This

option is set to true for now, and a warning is issued if a suspicious FADT

register length is overridden with the default value.

Fixed a reference count issue in NsRepairObject. This problem was introduced

in version 20081031 as part of a fix to repair Buffer objects within

Packages. Lin Ming.

Added semaphore support to the Linux/Unix application OS-services layer

(OSL). ACPICA BZ 448. Lin Ming.

Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes will

be implemented in the OSL, or will binary semaphores be used instead.

Example Code and Data Size: These are the sizes for the OS-independent

acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The

debug version of the code includes the debug output trace mechanism and has a

much larger code and data size.

  Previous Release:

    Non-Debug Version:  81.7K Code, 17.3K Data,  99.0K Total

    Debug Version:     156.4K Code, 49.4K Data, 205.8K Total

  Current Release:

    Non-Debug Version:  82.3K Code, 17.4K Data,  99.7K Total

    Debug Version:     157.1K Code, 49.7K Data, 206.8K Total

2) iASL Compiler/Disassembler and Tools: