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diff --git a/changes.txt b/changes.txt index 82ab813229dc..2e64a9062859 100644 --- a/changes.txt +++ b/changes.txt @@ -1,7 +1,214 @@ ---------------------------------------- -22 September 2011. Summary of changes for version 20110922: +23 November 2011. Summary of changes for version 20111123: This release is available at www.acpica.org/downloads +The ACPI 5.0 specification is available at www.acpi.info + +0) ACPI 5.0 Support: + +This release contains full support for the ACPI 5.0 specification, as +summarized below. + +Reduced Hardware Support: +------------------------- + +This support allows for ACPI systems without the usual ACPI hardware. This +support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA will +not attempt to initialize or use any of the usual ACPI hardware. Note, when +this flag is set, all of the following ACPI hardware is assumed to be not +present and is not initialized or accessed: + + General Purpose Events (GPEs) + Fixed Events (PM1a/PM1b and PM Control) + Power Management Timer and Console Buttons (power/sleep) + Real-time Clock Alarm + Global Lock + System Control Interrupt (SCI) + The FACS is assumed to be non-existent + +ACPI Tables: +------------ + +All new tables and updates to existing tables are fully supported in the +ACPICA headers (for use by device drivers), the disassembler, and the iASL +Data Table Compiler. ACPI 5.0 defines these new tables: + + BGRT /* Boot Graphics Resource Table */ + DRTM /* Dynamic Root of Trust for Measurement table */ + FPDT /* Firmware Performance Data Table */ + GTDT /* Generic Timer Description Table */ + MPST /* Memory Power State Table */ + PCCT /* Platform Communications Channel Table */ + PMTT /* Platform Memory Topology Table */ + RASF /* RAS Feature table */ + +Operation Regions/SpaceIDs: +--------------------------- + +All new operation regions are fully supported by the iASL compiler, the +disassembler, and the ACPICA runtime code (for dispatch to region handlers.) +The new operation region Space IDs are: + + GeneralPurposeIo + GenericSerialBus + +Resource Descriptors: +--------------------- + +All new ASL resource descriptors are fully supported by the iASL compiler, the +ASL/AML disassembler, and the ACPICA runtime Resource Manager code (including +all new predefined resource tags). New descriptors are: + + FixedDma + GpioIo + GpioInt + I2cSerialBus + SpiSerialBus + UartSerialBus + +ASL/AML Operators, New and Modified: +------------------------------------ + +One new operator is added, the Connection operator, which is used to associate +a GeneralPurposeIo or GenericSerialBus resource descriptor with individual +field objects within an operation region. Several new protocols are associated +with the AccessAs operator. All are fully supported by the iASL compiler, +disassembler, and runtime ACPICA AML interpreter: + + Connection // Declare Field Connection attributes + AccessAs: AttribBytes (n) // Read/Write N-Bytes Protocol + AccessAs: AttribRawBytes (n) // Raw Read/Write N-Bytes Protocol + AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol + RawDataBuffer // Data type for Vendor Data fields + +Predefined ASL/AML Objects: +--------------------------- + +All new predefined objects/control-methods are supported by the iASL compiler +and the ACPICA runtime validation/repair (arguments and return values.) New +predefined names include the following: + +Standard Predefined Names (Objects or Control Methods): + _AEI, _CLS, _CPC, _CWS, _DEP, + _DLM, _EVT, _GCP, _CRT, _GWS, + _HRV, _PRE, _PSE, _SRT, _SUB. + +Resource Tags (Names used to access individual fields within resource +descriptors): + _DBT, _DPL, _DRS, _END, _FLC, + _IOR, _LIN, _MOD, _PAR, _PHA, + _PIN, _PPI, _POL, _RXL, _SLV, + _SPE, _STB, _TXL, _VEN. + +ACPICA External Interfaces: +--------------------------- + +Several new interfaces have been defined for use by ACPI-related device +drivers and other host OS services: + +AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS to +acquire and release AML mutexes that are defined in the DSDT/SSDT tables +provided by the BIOS. They are intended to be used in conjunction with the +ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level +mutual exclusion with the AML code/interpreter. + +AcpiGetEventResources: Returns the (formatted) resource descriptors as defined +by the ACPI 5.0 _AEI object (ACPI Event Information). This object provides +resource descriptors associated with hardware-reduced platform events, similar +to the AcpiGetCurrentResources interface. + +Operation Region Handlers: For General Purpose IO and Generic Serial Bus +operation regions, information about the Connection() object and any optional +length information is passed to the region handler within the Context +parameter. + +AcpiBufferToResource: This interface converts a raw AML buffer containing a +resource template or resource descriptor to the ACPI_RESOURCE internal format +suitable for use by device drivers. Can be used by an operation region handler +to convert the Connection() buffer object into a ACPI_RESOURCE. + +Miscellaneous/Tools/TestSuites: +------------------------------- + +Support for extended _HID names (Four alpha characters instead of three). +Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities. +Support for ACPI 5.0 features in the ASLTS test suite. +Fully updated documentation (ACPICA and iASL reference documents.) + +ACPI Table Definition Language: +------------------------------- + +Support for this language was implemented and released as a subsystem of the +iASL compiler in 2010. (See the iASL compiler User Guide.) + + +Non-ACPI 5.0 changes for this release: +-------------------------------------- + +1) ACPICA Core Subsystem: + +Fix a problem with operation region declarations where a failure can occur if +the region name and an argument that evaluates to an object (such as the +region address) are in different namespace scopes. Lin Ming, ACPICA BZ 937. + +Do not abort an ACPI table load if an invalid space ID is found within. This +will be caught later if the offending method is executed. ACPICA BZ 925. + +Fixed an issue with the FFixedHW space ID where the ID was not always +recognized properly (Both ACPICA and iASL). ACPICA BZ 926. + +Fixed a problem with the 32-bit generation of the unix-specific OSL +(osunixxf.c). Lin Ming, ACPICA BZ 936. + +Several changes made to enable generation with the GCC 4.6 compiler. ACPICA BZ +935. + +New error messages: Unsupported I/O requests (not 8/16/32 bit), and Index/Bank +field registers out-of-range. + +2) iASL Compiler/Disassembler and Tools: + +iASL: Implemented the __PATH__ operator, which returns the full pathname of +the current source file. + +AcpiHelp: Automatically display expanded keyword information for all ASL +operators. + +Debugger: Add "Template" command to disassemble/dump resource template +buffers. + +Added a new master script to generate and execute the ASLTS test suite. +Automatically handles 32- and 64-bit generation. See tests/aslts.sh + +iASL: Fix problem with listing generation during processing of the Switch() +operator where AML listing was disabled until the entire Switch block was +completed. + +iASL: Improve support for semicolon statement terminators. Fix "invalid +character" message for some cases when the semicolon is used. Semicolons are +now allowed after every <Term> grammar element. ACPICA BZ 927. + +iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ 923. + +Disassembler: Fix problem with disassembly of the DataTableRegion operator +where an inadvertent "Unhandled deferred opcode" message could be generated. + +3) Example Code and Data Size + +These are the sizes for the OS-independent acpica.lib produced by the +Microsoft Visual C++ 9.0 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: 90.2K Code, 23.9K Data, 114.1K Total + Debug Version: 165.6K Code, 68.4K Data, 234.0K Total + Current Release: + Non-Debug Version: 92.3K Code, 24.9K Data, 117.2K Total + Debug Version: 170.8K Code, 72.6K Data, 243.4K Total + +---------------------------------------- +22 September 2011. Summary of changes for version 20110922: 0) ACPI 5.0 News: |