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diff --git a/sys/contrib/dev/acpica/CHANGES.txt b/sys/contrib/dev/acpica/CHANGES.txt new file mode 100644 index 0000000..f26ed47 --- /dev/null +++ b/sys/contrib/dev/acpica/CHANGES.txt @@ -0,0 +1,8448 @@ +---------------------------------------- +20 March 2007. Summary of changes for version 20070320: + +1) ACPI CA Core Subsystem: + +Implemented a change to the order of interpretation and +evaluation of AML operand objects within the AML interpreter. The +interpreter now evaluates operands in the order that they appear +in the AML stream (and the corresponding ASL code), instead of in +the reverse order (after the entire operand list has been +parsed). The previous behavior caused several subtle +incompatibilities with the Microsoft AML interpreter as well as +being somewhat non-intuitive. BZ 7871, local BZ 263. Valery +Podrezov. + +Implemented a change to the ACPI Global Lock support. All +interfaces to the global lock now allow the same thread to +acquire the lock multiple times. This affects the +AcpiAcquireGlobalLock external interface to the global lock as +well as the internal use of the global lock to support AML fields +-- a control method that is holding the global lock can now +simultaneously access AML fields that require global lock +protection. Previously, in both cases, this would have resulted +in an AE_ALREADY_ACQUIRED exception. The change to +AcpiAcquireGlobalLock is of special interest to drivers for the +Embedded Controller. There is no change to the behavior of the +AML Acquire operator, as this can already be used to acquire a +mutex multiple times by the same thread. BZ 8066. With assistance +from Alexey Starikovskiy. + +Fixed a problem where invalid objects could be referenced in the +AML Interpreter after error conditions. During operand +evaluation, ensure that the internal "Return Object" field is +cleared on error and only valid pointers are stored there. Caused +occasional access to deleted objects that resulted in "large +reference count" warning messages. Valery Podrezov. + +Fixed a problem where an AE_STACK_OVERFLOW internal exception +could occur on deeply nested control method invocations. BZ 7873, +local BZ 487. Valery Podrezov. + +Fixed an internal problem with the handling of result objects on +the interpreter result stack. BZ 7872. Valery Podrezov. + +Removed obsolete code that handled the case where AML_NAME_OP is +the target of a reference (Reference.Opcode). This code was no +longer necessary. BZ 7874. Valery Podrezov. + +Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. +This was a remnant from the previously discontinued 16-bit +support. + +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: 78.0K Code, 17.1K Data, 95.1K Total + Debug Version: 155.8K Code, 63.3K Data, 219.1K Total + Current Release: + Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total + Debug Version: 155.9K Code, 63.1K Data, 219.0K Total + +---------------------------------------- +26 January 2007. Summary of changes for version 20070126: + +1) ACPI CA Core Subsystem: + +Added the 2007 copyright to all module headers and signons. This +affects virtually every file in the ACPICA core subsystem, the +iASL compiler, and the utilities. + +Implemented a fix for an incorrect parameter passed to +AcpiTbDeleteTable during a table load. A bad pointer was passed +in the case where the DSDT is overridden, causing a fault in this +case. + +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: 78.0K Code, 17.1K Data, 95.1K Total + Debug Version: 155.8K Code, 63.3K Data, 219.1K Total + Current Release: + Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total + Debug Version: 155.8K Code, 63.3K Data, 219.1K Total + +---------------------------------------- +15 December 2006. Summary of changes for version 20061215: + +1) ACPI CA Core Subsystem: + +Support for 16-bit ACPICA has been completely removed since it is +no longer necessary and it clutters the code. All 16-bit macros, +types, and conditional compiles have been removed, cleaning up +and simplifying the code across the entire subsystem. DOS support +is no longer needed since the bootable Linux firmware kit is now +available. + +The handler for the Global Lock is now removed during +AcpiTerminate to enable a clean subsystem restart, via the +implementation of the AcpiEvRemoveGlobalLockHandler function. +(With assistance from Joel Bretz, HP) + +Implemented enhancements to the multithreading support within the +debugger to enable improved multithreading debugging and +evaluation of the subsystem. (Valery Podrezov) + +Debugger: Enhanced the Statistics/Memory command to emit the +total (maximum) memory used during the execution, as well as the +maximum memory consumed by each of the various object types. +(Valery Podrezov) + +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: 77.9K Code, 17.0K Data, 94.9K Total + Debug Version: 155.2K Code, 63.1K Data, 218.3K Total + Current Release: + Non-Debug Version: 78.0K Code, 17.1K Data, 95.1K Total + Debug Version: 155.8K Code, 63.3K Data, 219.1K Total + + +2) iASL Compiler/Disassembler and Tools: + +AcpiExec: Implemented a new option (-m) to display full memory +use statistics upon subsystem/program termination. (Valery +Podrezov) + +---------------------------------------- +09 November 2006. Summary of changes for version 20061109: + +1) ACPI CA Core Subsystem: + +Optimized the Load ASL operator in the case where the source +operand is an operation region. Simply map the operation region +memory, instead of performing a bytewise read. (Region must be of +type SystemMemory, see below.) + +Fixed the Load ASL operator for the case where the source operand +is a region field. A buffer object is also allowed as the source +operand. BZ 480 + +Fixed a problem where the Load ASL operator allowed the source +operand to be an operation region of any type. It is now +restricted to regions of type SystemMemory, as per the ACPI +specification. BZ 481 + +Additional cleanup and optimizations for the new Table Manager +code. + +AcpiEnable will now fail if all of the required ACPI tables are +not loaded (FADT, FACS, DSDT). BZ 477 + +Added #pragma pack(8/4) to acobject.h to ensure that the +structures in this header are always compiled as aligned. The +ACPI_OPERAND_OBJECT has been manually optimized to be aligned and +will not work if it is byte-packed. + +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: 78.1K Code, 17.1K Data, 95.2K Total + Debug Version: 155.4K Code, 63.1K Data, 218.5K Total + Current Release: + Non-Debug Version: 77.9K Code, 17.0K Data, 94.9K Total + Debug Version: 155.2K Code, 63.1K Data, 218.3K Total + + +2) iASL Compiler/Disassembler and Tools: + +Fixed a problem where the presence of the _OSI predefined control +method within complex expressions could cause an internal +compiler error. + +AcpiExec: Implemented full region support for multiple address +spaces. SpaceId is now part of the REGION object. BZ 429 + +---------------------------------------- +11 October 2006. Summary of changes for version 20061011: + +1) ACPI CA Core Subsystem: + +Completed an AML interpreter performance enhancement for control +method execution. Previously a 2-pass parse/execution, control +methods are now completely parsed and executed in a single pass. +This improves overall interpreter performance by ~25%, reduces +code size, and reduces CPU stack use. (Valery Podrezov + +interpreter changes in version 20051202 that eliminated namespace +loading during the pass one parse.) + +Implemented _CID support for PCI Root Bridge detection. If the +_HID does not match the predefined PCI Root Bridge IDs, the _CID +list (if present) is now obtained and also checked for an ID +match. + +Implemented additional support for the PCI _ADR execution: +upsearch until a device scope is found before executing _ADR. +This allows PCI_Config operation regions to be declared locally +within control methods underneath PCI device objects. + +Fixed a problem with a possible race condition between threads +executing AcpiWalkNamespace and the AML interpreter. This +condition was removed by modifying AcpiWalkNamespace to (by +default) ignore all temporary namespace entries created during +any concurrent control method execution. An additional namespace +race condition is known to exist between AcpiWalkNamespace and +the Load/Unload ASL operators and is still under investigation. + +Restructured the AML ParseLoop function, breaking it into several +subfunctions in order to reduce CPU stack use and improve +maintainability. (Mikhail Kouzmich) + +AcpiGetHandle: Fix for parameter validation to detect invalid +combinations of prefix handle and pathname. BZ 478 + +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: 77.9K Code, 17.1K Data, 95.0K Total + Debug Version: 154.6K Code, 63.0K Data, 217.6K Total + Current Release: + Non-Debug Version: 78.1K Code, 17.1K Data, 95.2K Total + Debug Version: 155.4K Code, 63.1K Data, 218.5K Total + +2) iASL Compiler/Disassembler and Tools: + +Ported the -g option (get local ACPI tables) to the new ACPICA +Table Manager to restore original behavior. + +---------------------------------------- +27 September 2006. Summary of changes for version 20060927: + +1) ACPI CA Core Subsystem: + +Removed the "Flags" parameter from AcpiGetRegister and +AcpiSetRegister. These functions now use a spinlock for mutual +exclusion and the interrupt level indication flag is not needed. + +Fixed a problem with the Global Lock where the lock could appear +to be obtained before it is actually obtained. The global lock +semaphore was inadvertently created with one unit instead of zero +units. (BZ 464) Fiodor Suietov. + +Fixed a possible memory leak and fault in +AcpiExResolveObjectToValue during a read from a buffer or region +field. (BZ 458) Fiodor Suietov. + +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: 77.9K Code, 17.1K Data, 95.0K Total + Debug Version: 154.7K Code, 63.0K Data, 217.7K Total + Current Release: + Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total + Debug Version: 154.6K Code, 63.0K Data, 217.6K Total + + +2) iASL Compiler/Disassembler and Tools: + +Fixed a compilation problem with the pre-defined Resource +Descriptor field names where an "object does not exist" error +could be incorrectly generated if the parent ResourceTemplate +pathname places the template within a different namespace scope +than the current scope. (BZ 7212) + +Fixed a problem where the compiler could hang after syntax errors +detected in an ElseIf construct. (BZ 453) + +Fixed a problem with the AmlFilename parameter to the +DefinitionBlock() operator. An incorrect output filename was +produced when this parameter was a null string (""). Now, the +original input filename is used as the AML output filename, with +an ".aml" extension. + +Implemented a generic batch command mode for the AcpiExec utility +(execute any AML debugger command) (Valery Podrezov). + +---------------------------------------- +12 September 2006. Summary of changes for version 20060912: + +1) ACPI CA Core Subsystem: + +Enhanced the implementation of the "serialized mode" of the +interpreter (enabled via the AcpiGbl_AllMethodsSerialized flag.) +When this mode is specified, instead of creating a serialization +semaphore per control method, the interpreter lock is simply no +longer released before a blocking operation during control method +execution. This effectively makes the AML Interpreter single- +threaded. The overhead of a semaphore per-method is eliminated. + +Fixed a regression where an error was no longer emitted if a +control method attempts to create 2 objects of the same name. +This once again returns AE_ALREADY_EXISTS. When this exception +occurs, it invokes the mechanism that will dynamically serialize +the control method to possible prevent future errors. (BZ 440) + +Integrated a fix for a problem with PCI Express HID detection in +the PCI Config Space setup procedure. (BZ 7145) + +Moved all FADT-related functions to a new file, tbfadt.c. +Eliminated the AcpiHwInitialize function - the FADT registers are +now validated when the table is loaded. + +Added two new warnings during FADT verification - 1) if the FADT +is larger than the largest known FADT version, and 2) if there is +a mismatch between a 32-bit block address and the 64-bit X +counterpart (when both are non-zero.) + +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: 77.9K Code, 16.7K Data, 94.6K Total + Debug Version: 154.9K Code, 62.6K Data, 217.5K Total + Current Release: + Non-Debug Version: 77.9K Code, 17.1K Data, 95.0K Total + Debug Version: 154.7K Code, 63.0K Data, 217.7K Total + + +2) iASL Compiler/Disassembler and Tools: + +Fixed a problem with the implementation of the Switch() operator +where the temporary variable was declared too close to the actual +Switch, instead of at method level. This could cause a problem if +the Switch() operator is within a while loop, causing an error on +the second iteration. (BZ 460) + +Disassembler - fix for error emitted for unknown type for target +of scope operator. Now, ignore it and continue. + +Disassembly of an FADT now verifies the input FADT and reports +any errors found. Fix for proper disassembly of full-sized (ACPI +2.0) FADTs. + +Disassembly of raw data buffers with byte initialization data now +prefixes each output line with the current buffer offset. + +Disassembly of ASF! table now includes all variable-length data +fields at the end of some of the subtables. + +The disassembler now emits a comment if a buffer appears to be a +ResourceTemplate, but cannot be disassembled as such because the +EndTag does not appear at the very end of the buffer. + +AcpiExec - Added the "-t" command line option to enable the +serialized mode of the AML interpreter. + +---------------------------------------- +31 August 2006. Summary of changes for version 20060831: + +1) ACPI CA Core Subsystem: + +Miscellaneous fixes for the Table Manager: +- Correctly initialize internal common FADT for all 64-bit "X" +fields +- Fixed a couple table mapping issues during table load +- Fixed a couple alignment issues for IA64 +- Initialize input array to zero in AcpiInitializeTables +- Additional parameter validation for AcpiGetTable, +AcpiGetTableHeader, AcpiGetTableByIndex + +Change for GPE support: when a "wake" GPE is received, all wake +GPEs are now immediately disabled to prevent the waking GPE from +firing again and to prevent other wake GPEs from interrupting the +wake process. + +Added the AcpiGpeCount global that tracks the number of processed +GPEs, to be used for debugging systems with a large number of +ACPI interrupts. + +Implemented support for the "DMAR" ACPI table (DMA Redirection +Table) in both the ACPICA headers and the disassembler. + +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: 77.8K Code, 16.5K Data, 94.3K Total + Debug Version: 154.6K Code, 62.3K Data, 216.9K Total + Current Release: + Non-Debug Version: 77.9K Code, 16.7K Data, 94.6K Total + Debug Version: 154.9K Code, 62.6K Data, 217.5K Total + + +2) iASL Compiler/Disassembler and Tools: + +Disassembler support for the DMAR ACPI table. + +---------------------------------------- +23 August 2006. Summary of changes for version 20060823: + +1) ACPI CA Core Subsystem: + +The Table Manager component has been completely redesigned and +reimplemented. The new design is much simpler, and reduces the +overall code and data size of the kernel-resident ACPICA by +approximately 5%. Also, it is now possible to obtain the ACPI +tables very early during kernel initialization, even before +dynamic memory management is initialized. (Alexey Starikovskiy, +Fiodor Suietov, Bob Moore) + +Obsolete ACPICA interfaces: + +- AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early +kernel init time). +- AcpiLoadTable: Not needed. +- AcpiUnloadTable: Not needed. + +New ACPICA interfaces: + +- AcpiInitializeTables: Must be called before the table manager +can be used. +- AcpiReallocateRootTable: Used to transfer the root table to +dynamically allocated memory after it becomes available. +- AcpiGetTableByIndex: Allows the host to easily enumerate all +ACPI tables in the RSDT/XSDT. + +Other ACPICA changes: + +- AcpiGetTableHeader returns the actual mapped table header, not +a copy. Use AcpiOsUnmapMemory to free this mapping. +- AcpiGetTable returns the actual mapped table. The mapping is +managed internally and must not be deleted by the caller. Use of +this interface causes no additional dynamic memory allocation. +- AcpiFindRootPointer: Support for physical addressing has been +eliminated, it appeared to be unused. +- The interface to AcpiOsMapMemory has changed to be consistent +with the other allocation interfaces. +- The interface to AcpiOsGetRootPointer has changed to eliminate +unnecessary parameters. +- ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 +bits on 64-bit platforms. Was previously 64 bits on all +platforms. +- The interface to the ACPI Global Lock acquire/release macros +have changed slightly since ACPICA no longer keeps a local copy +of the FACS with a constructed pointer to the actual global lock. + +Porting to the new table manager: + +- AcpiInitializeTables: Must be called once, and can be called +anytime during the OS initialization process. It allows the host +to specify an area of memory to be used to store the internal +version of the RSDT/XSDT (root table). This allows the host to +access ACPI tables before memory management is initialized and +running. +- AcpiReallocateRootTable: Can be called after memory management +is running to copy the root table to a dynamically allocated +array, freeing up the scratch memory specified in the call to +AcpiInitializeTables. +- AcpiSubsystemInitialize: This existing interface is independent +of the Table Manager, and does not have to be called before the +Table Manager can be used, it only must be called before the rest +of ACPICA can be used. +- ACPI Tables: Some changes have been made to the names and +structure of the actbl.h and actbl1.h header files and may +require changes to existing code. For example, bitfields have +been completely removed because of their lack of portability +across C compilers. +- Update interfaces to the Global Lock acquire/release macros if +local versions are used. (see acwin.h) + +Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c + +New files: tbfind.c + +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: 80.7K Code, 17.9K Data, 98.6K Total + Debug Version: 161.0K Code, 65.1K Data, 226.1K Total + Current Release: + Non-Debug Version: 77.8K Code, 16.5K Data, 94.3K Total + Debug Version: 154.6K Code, 62.3K Data, 216.9K Total + + +2) iASL Compiler/Disassembler and Tools: + +No changes for this release. + +---------------------------------------- +21 July 2006. Summary of changes for version 20060721: + +1) ACPI CA Core Subsystem: + +The full source code for the ASL test suite used to validate the +iASL compiler and the ACPICA core subsystem is being released +with the ACPICA source for the first time. The source is +contained in a separate package and consists of over 1100 files +that exercise all ASL/AML operators. The package should appear on +the Intel/ACPI web site shortly. (Valery Podrezov, Fiodor +Suietov) + +Completed a new design and implementation for support of the ACPI +Global Lock. On the OS side, the global lock is now treated as a +standard AML mutex. Previously, multiple OS threads could +"acquire" the global lock simultaneously. However, this could +cause the BIOS to be starved out of the lock - especially in +cases such as the Embedded Controller driver where there is a +tight coupling between the OS and the BIOS. + +Implemented an optimization for the ACPI Global Lock interrupt +mechanism. The Global Lock interrupt handler no longer queues the +execution of a separate thread to signal the global lock +semaphore. Instead, the semaphore is signaled directly from the +interrupt handler. + +Implemented support within the AML interpreter for package +objects that contain a larger AML length (package list length) +than the package element count. In this case, the length of the +package is truncated to match the package element count. Some +BIOS code apparently modifies the package length on the fly, and +this change supports this behavior. Provides compatibility with +the MS AML interpreter. (With assistance from Fiodor Suietov) + +Implemented a temporary fix for the BankValue parameter of a Bank +Field to support all constant values, now including the Zero and +One opcodes. Evaluation of this parameter must eventually be +converted to a full TermArg evaluation. A not-implemented error +is now returned (temporarily) for non-constant values for this +parameter. + +Fixed problem reports (Fiodor Suietov) integrated: +- Fix for premature object deletion after CopyObject on Operation +Region (BZ 350) + +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: 80.7K Code, 18.0K Data, 98.7K Total + Debug Version: 160.9K Code, 65.1K Data, 226.0K Total + Current Release: + Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total + Debug Version: 161.0K Code, 65.1K Data, 226.1K Total + + +2) iASL Compiler/Disassembler and Tools: + +No changes for this release. + +---------------------------------------- +07 July 2006. Summary of changes for version 20060707: + +1) ACPI CA Core Subsystem: + +Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C +compilers that do not allow the initialization of address +pointers within packed structures - even though the hardware +itself may support misaligned transfers. Some of the debug data +structures are packed by default to minimize size. + +Added an error message for the case where AcpiOsGetThreadId() +returns zero. A non-zero value is required by the core ACPICA +code to ensure the proper operation of AML mutexes and recursive +control methods. + +The DSDT is now the only ACPI table that determines whether the +AML interpreter is in 32-bit or 64-bit mode. Not really a +functional change, but the hooks for per-table 32/64 switching +have been removed from the code. A clarification to the ACPI +specification is forthcoming in ACPI 3.0B. + +Fixed a possible leak of an OwnerID in the error path of +AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table +OwnerID deletion to a single place in AcpiTbUninstallTable to +correct possible leaks when using the AcpiTbDeleteTablesByType +interface (with assistance from Lance Ortiz.) + +Fixed a problem with Serialized control methods where the +semaphore associated with the method could be over-signaled after +multiple method invocations. + +Fixed two issues with the locking of the internal namespace data +structure. Both the Unload() operator and AcpiUnloadTable +interface now lock the namespace during the namespace deletion +associated with the table unload (with assistance from Linn +Crosetto.) + +Fixed problem reports (Valery Podrezov) integrated: +- Eliminate unnecessary memory allocation for CreateXxxxField (BZ +5426) + +Fixed problem reports (Fiodor Suietov) integrated: +- Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369) +- On Address Space handler deletion, needless deactivation call +(BZ 374) +- AcpiRemoveAddressSpaceHandler: validate Device handle parameter +(BZ 375) +- Possible memory leak, Notify sub-objects of Processor, Power, +ThermalZone (BZ 376) +- AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ +378) +- Minimum Length of RSDT should be validated (BZ 379) +- AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj +has no Handler (BZ (380) +- AcpiUnloadTable: return AE_NOT_EXIST if no table of specified +type loaded (BZ 381) + +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: 80.5K Code, 17.8K Data, 98.3K Total + Debug Version: 160.8K Code, 64.8K Data, 225.6K Total + Current Release: + Non-Debug Version: 80.7K Code, 17.9K Data, 98.6K Total + Debug Version: 161.0K Code, 65.1K Data, 226.1K Total + + +2) iASL Compiler/Disassembler and Tools: + +Fixed problem reports: +Compiler segfault when ASL contains a long (>1024) String +declaration (BZ 436) + +---------------------------------------- +23 June 2006. Summary of changes for version 20060623: + +1) ACPI CA Core Subsystem: + +Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. +This allows the type to be customized to the host OS for improved +efficiency (since a spinlock is usually a very small object.) + +Implemented support for "ignored" bits in the ACPI registers. +According to the ACPI specification, these bits should be +preserved when writing the registers via a read/modify/write +cycle. There are 3 bits preserved in this manner: PM1_CONTROL[0] +(SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11]. + +Implemented the initial deployment of new OSL mutex interfaces. +Since some host operating systems have separate mutex and +semaphore objects, this feature was requested. The base code now +uses mutexes (and the new mutex interfaces) wherever a binary +semaphore was used previously. However, for the current release, +the mutex interfaces are defined as macros to map them to the +existing semaphore interfaces. Therefore, no OSL changes are +required at this time. (See acpiosxf.h) + +Fixed several problems with the support for the control method +SyncLevel parameter. The SyncLevel now works according to the +ACPI specification and in concert with the Mutex SyncLevel +parameter, since the current SyncLevel is a property of the +executing thread. Mutual exclusion for control methods is now +implemented with a mutex instead of a semaphore. + +Fixed three instances of the use of the C shift operator in the +bitfield support code (exfldio.c) to avoid the use of a shift +value larger than the target data width. The behavior of C +compilers is undefined in this case and can cause unpredictable +results, and therefore the case must be detected and avoided. +(Fiodor Suietov) + +Added an info message whenever an SSDT or OEM table is loaded +dynamically via the Load() or LoadTable() ASL operators. This +should improve debugging capability since it will show exactly +what tables have been loaded (beyond the tables present in the +RSDT/XSDT.) + +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: 80.0K Code, 17.6K Data, 97.6K Total + Debug Version: 160.2K Code, 64.7K Data, 224.9K Total + Current Release: + Non-Debug Version: 80.5K Code, 17.8K Data, 98.3K Total + Debug Version: 160.8K Code, 64.8K Data, 225.6K Total + + +2) iASL Compiler/Disassembler and Tools: + +No changes for this release. + +---------------------------------------- +08 June 2006. Summary of changes for version 20060608: + +1) ACPI CA Core Subsystem: + +Converted the locking mutex used for the ACPI hardware to a +spinlock. This change should eliminate all problems caused by +attempting to acquire a semaphore at interrupt level, and it +means that all ACPICA external interfaces that directly access +the ACPI hardware can be safely called from interrupt level. OSL +code that implements the semaphore interfaces should be able to +eliminate any workarounds for being called at interrupt level. + +Fixed a regression introduced in 20060526 where the ACPI device +initialization could be prematurely aborted with an AE_NOT_FOUND +if a device did not have an optional _INI method. + +Fixed an IndexField issue where a write to the Data Register +should be limited in size to the AccessSize (width) of the +IndexField itself. (BZ 433, Fiodor Suietov) + +Fixed problem reports (Valery Podrezov) integrated: +- Allow store of ThermalZone objects to Debug object (BZ +5369/5370) + +Fixed problem reports (Fiodor Suietov) integrated: +- AcpiGetTableHeader doesn't handle multiple instances correctly +(BZ 364) + +Removed four global mutexes that were obsolete and were no longer +being used. + +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: 80.0K Code, 17.7K Data, 97.7K Total + Debug Version: 160.3K Code, 64.9K Data, 225.2K Total + Current Release: + Non-Debug Version: 80.0K Code, 17.6K Data, 97.6K Total + Debug Version: 160.2K Code, 64.7K Data, 224.9K Total + + +2) iASL Compiler/Disassembler and Tools: + +Fixed a fault when using -g option (get tables from registry) on +Windows machines. + +Fixed problem reports integrated: +- Generate error if CreateField NumBits parameter is zero. (BZ +405) +- Fault if Offset/Length in Field unit is very large (BZ 432, +Fiodor Suietov) +- Global table revision override (-r) is ignored (BZ 413) + +---------------------------------------- +26 May 2006. Summary of changes for version 20060526: + +1) ACPI CA Core Subsystem: + +Restructured, flattened, and simplified the internal interfaces +for namespace object evaluation - resulting in smaller code, less +CPU stack use, and fewer interfaces. (With assistance from +Mikhail Kouzmich) + +Fixed a problem with the CopyObject operator where the first +parameter was not typed correctly for the parser, interpreter, +compiler, and disassembler. Caused various errors and unexpected +behavior. + +Fixed a problem where a ShiftLeft or ShiftRight of more than 64 +bits produced incorrect results with some C compilers. Since the +behavior of C compilers when the shift value is larger than the +datatype width is apparently not well defined, the interpreter +now detects this condition and simply returns zero as expected in +all such cases. (BZ 395) + +Fixed problem reports (Valery Podrezov) integrated: +- Update String-to-Integer conversion to match ACPI 3.0A spec (BZ +5329) +- Allow interpreter to handle nested method declarations (BZ +5361) + +Fixed problem reports (Fiodor Suietov) integrated: +- AcpiTerminate doesn't free debug memory allocation list objects +(BZ 355) +- After Core Subsystem shutdown, AcpiSubsystemStatus returns +AE_OK (BZ 356) +- AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ +357) +- Resource Manager should return AE_TYPE for non-device objects +(BZ 358) +- Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359) +- Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData +(BZ 360) +- Incomplete cleanup branch in AcpiPsParseAml (BZ 361) +- Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362) +- AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is +loaded (BZ 365) +- Status of the Global Initialization Handler call not used (BZ +366) +- Incorrect object parameter to Global Initialization Handler (BZ +367) + +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: 79.8K Code, 17.7K Data, 97.5K Total + Debug Version: 160.5K Code, 65.1K Data, 225.6K Total + Current Release: + Non-Debug Version: 80.0K Code, 17.7K Data, 97.7K Total + Debug Version: 160.3K Code, 64.9K Data, 225.2K Total + + +2) iASL Compiler/Disassembler and Tools: + +Modified the parser to allow the names IO, DMA, and IRQ to be +used as namespace identifiers with no collision with existing +resource descriptor macro names. This provides compatibility with +other ASL compilers and is most useful for +disassembly/recompilation of existing tables without parse +errors. (With assistance from Thomas Renninger) + +Disassembler: fixed an incorrect disassembly problem with the +DataTableRegion and CopyObject operators. Fixed a possible fault +during disassembly of some Alias operators. + +---------------------------------------- +12 May 2006. Summary of changes for version 20060512: + +1) ACPI CA Core Subsystem: + +Replaced the AcpiOsQueueForExecution interface with a new +interface named AcpiOsExecute. The major difference is that the +new interface does not have a Priority parameter, this appeared +to be useless and has been replaced by a Type parameter. The Type +tells the host what type of execution is being requested, such as +global lock handler, notify handler, GPE handler, etc. This +allows the host to queue and execute the request as appropriate +for the request type, possibly using different work queues and +different priorities for the various request types. This enables +fixes for multithreading deadlock problems such as BZ #5534, and +will require changes to all existing OS interface layers. (Alexey +Starikovskiy and Bob Moore) + +Fixed a possible memory leak associated with the support for the +so-called "implicit return" ACPI extension. Reported by FreeBSD, +BZ #6514. (Fiodor Suietov) + +Fixed a problem with the Load() operator where a table load from +an operation region could overwrite an internal table buffer by +up to 7 bytes and cause alignment faults on IPF systems. (With +assistance from Luming Yu) + +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: 79.7K Code, 17.7K Data, 97.4K Total + Debug Version: 160.1K Code, 65.2K Data, 225.3K Total + Current Release: + Non-Debug Version: 79.8K Code, 17.7K Data, 97.5K Total + Debug Version: 160.5K Code, 65.1K Data, 225.6K Total + + + +2) iASL Compiler/Disassembler and Tools: + +Disassembler: Implemented support to cross reference the internal +namespace and automatically generate ASL External() statements +for symbols not defined within the current table being +disassembled. This will simplify the disassembly and +recompilation of interdependent tables such as SSDTs since these +statements will no longer have to be added manually. + +Disassembler: Implemented experimental support to automatically +detect invocations of external control methods and generate +appropriate External() statements. This is problematic because +the AML cannot be correctly parsed until the number of arguments +for each control method is known. Currently, standalone method +invocations and invocations as the source operand of a Store() +statement are supported. + +Disassembler: Implemented support for the ASL pseudo-operators +LNotEqual, LLessEqual, and LGreaterEqual. Previously disassembled +as LNot(LEqual()), LNot(LGreater()), and LNot(LLess()), this +makes the disassembled ASL code more readable and likely closer +to the original ASL source. + +---------------------------------------- +21 April 2006. Summary of changes for version 20060421: + +1) ACPI CA Core Subsystem: + +Removed a device initialization optimization introduced in +20051216 where the _STA method was not run unless an _INI was +also present for the same device. This optimization could cause +problems because it could allow _INI methods to be run within a +not-present device subtree. (If a not-present device had no _INI, +_STA would not be run, the not-present status would not be +discovered, and the children of the device would be incorrectly +traversed.) + +Implemented a new _STA optimization where namespace subtrees that +do not contain _INI are identified and ignored during device +initialization. Selectively running _STA can significantly +improve boot time on large machines (with assistance from Len +Brown.) + +Implemented support for the device initialization case where the +returned _STA flags indicate a device not-present but +functioning. In this case, _INI is not run, but the device +children are examined for presence, as per the ACPI +specification. + +Implemented an additional change to the IndexField support in +order to conform to MS behavior. The value written to the Index +Register is not simply a byte offset, it is a byte offset in +units of the access width of the parent Index Field. (Fiodor +Suietov) + +Defined and deployed a new OSL interface, AcpiOsValidateAddress. +This interface is called during the creation of all AML operation +regions, and allows the host OS to exert control over what +addresses it will allow the AML code to access. Operation Regions +whose addresses are disallowed will cause a runtime exception +when they are actually accessed (will not affect or abort table +loading.) See oswinxf or osunixxf for an example implementation. + +Defined and deployed a new OSL interface, +AcpiOsValidateInterface. This interface allows the host OS to +match the various "optional" interface/behavior strings for the +_OSI predefined control method as appropriate (with assistance +from Bjorn Helgaas.) See oswinxf or osunixxf for an example +implementation. + +Restructured and corrected various problems in the exception +handling code paths within DsCallControlMethod and +DsTerminateControlMethod in dsmethod (with assistance from +Takayoshi Kochi.) + +Modified the Linux source converter to ignore quoted string +literals while converting identifiers from mixed to lower case. +This will correct problems with the disassembler and other areas +where such strings must not be modified. + +The ACPI_FUNCTION_* macros no longer require quotes around the +function name. This allows the Linux source converter to convert +the names, now that the converter ignores quoted strings. + +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: 81.1K Code, 17.7K Data, 98.8K Total + Debug Version: 158.9K Code, 64.9K Data, 223.8K Total + Current Release: + Non-Debug Version: 79.7K Code, 17.7K Data, 97.4K Total + Debug Version: 160.1K Code, 65.2K Data, 225.3K Total + + +2) iASL Compiler/Disassembler and Tools: + +Implemented 3 new warnings for iASL, and implemented multiple +warning levels (w2 flag). + +1) Ignored timeouts: If the TimeoutValue parameter to Wait or +Acquire is not WAIT_FOREVER (0xFFFF) and the code does not +examine the return value to check for the possible timeout, a +warning is issued. + +2) Useless operators: If an ASL operator does not specify an +optional target operand and it also does not use the function +return value from the operator, a warning is issued since the +operator effectively does nothing. + +3) Unreferenced objects: If a namespace object is created, but +never referenced, a warning is issued. This is a warning level 2 +since there are cases where this is ok, such as when a secondary +table is loaded that uses the unreferenced objects. Even so, care +is taken to only flag objects that don't look like they will ever +be used. For example, the reserved methods (starting with an +underscore) are usually not referenced because it is expected +that the OS will invoke them. + +---------------------------------------- +31 March 2006. Summary of changes for version 20060331: + +1) ACPI CA Core Subsystem: + +Implemented header file support for the following additional ACPI +tables: ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. +With this support, all current and known ACPI tables are now +defined in the ACPICA headers and are available for use by device +drivers and other software. + +Implemented support to allow tables that contain ACPI names with +invalid characters to be loaded. Previously, this would cause the +table load to fail, but since there are several known cases of +such tables on existing machines, this change was made to enable +ACPI support for them. Also, this matches the behavior of the +Microsoft ACPI implementation. + +Fixed a couple regressions introduced during the memory +optimization in the 20060317 release. The namespace node +definition required additional reorganization and an internal +datatype that had been changed to 8-bit was restored to 32-bit. +(Valery Podrezov) + +Fixed a problem where a null pointer passed to +AcpiUtDeleteGenericState could be passed through to +AcpiOsReleaseObject which is unexpected. Such null pointers are +now trapped and ignored, matching the behavior of the previous +implementation before the deployment of AcpiOsReleaseObject. +(Valery Podrezov, Fiodor Suietov) + +Fixed a memory mapping leak during the deletion of a SystemMemory +operation region where a cached memory mapping was not deleted. +This became a noticeable problem for operation regions that are +defined within frequently used control methods. (Dana Meyers) + +Reorganized the ACPI table header files into two main files: one +for the ACPI tables consumed by the ACPICA core, and another for +the miscellaneous ACPI tables that are consumed by the drivers +and other software. The various FADT definitions were merged into +one common section and three different tables (ACPI 1.0, 1.0+, +and 2.0) + +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: 80.9K Code, 17.7K Data, 98.6K Total + Debug Version: 158.7K Code, 64.8K Data, 223.5K Total + Current Release: + Non-Debug Version: 81.1K Code, 17.7K Data, 98.8K Total + Debug Version: 158.9K Code, 64.9K Data, 223.8K Total + + +2) iASL Compiler/Disassembler and Tools: + +Disassembler: Implemented support to decode and format all non- +AML ACPI tables (tables other than DSDTs and SSDTs.) This +includes the new tables added to the ACPICA headers, therefore +all current and known ACPI tables are supported. + +Disassembler: The change to allow ACPI names with invalid +characters also enables the disassembly of such tables. Invalid +characters within names are changed to '*' to make the name +printable; the iASL compiler will still generate an error for +such names, however, since this is an invalid ACPI character. + +Implemented an option for AcpiXtract (-a) to extract all tables +found in the input file. The default invocation extracts only the +DSDTs and SSDTs. + +Fixed a couple of gcc generation issues for iASL and AcpiExec and +added a makefile for the AcpiXtract utility. + +---------------------------------------- +17 March 2006. Summary of changes for version 20060317: + +1) ACPI CA Core Subsystem: + +Implemented the use of a cache object for all internal namespace +nodes. Since there are about 1000 static nodes in a typical +system, this will decrease memory use for cache implementations +that minimize per-allocation overhead (such as a slab allocator.) + +Removed the reference count mechanism for internal namespace +nodes, since it was deemed unnecessary. This reduces the size of +each namespace node by about 5%-10% on all platforms. Nodes are +now 20 bytes for the 32-bit case, and 32 bytes for the 64-bit +case. + +Optimized several internal data structures to reduce object size +on 64-bit platforms by packing data within the 64-bit alignment. +This includes the frequently used ACPI_OPERAND_OBJECT, of which +there can be ~1000 static instances corresponding to the +namespace objects. + +Added two new strings for the predefined _OSI method: "Windows +2001.1 SP1" and "Windows 2006". + +Split the allocation tracking mechanism out to a separate file, +from utalloc.c to uttrack.c. This mechanism appears to be only +useful for application-level code. Kernels may wish to not +include uttrack.c in distributions. + +Removed all remnants of the obsolete ACPI_REPORT_* macros and the +associated code. (These macros have been replaced by the +ACPI_ERROR and ACPI_WARNING macros.) + +Code and Data Size: These are the sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 32-bit compiler. The +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release: + Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total + Debug Version: 161.6K Code, 65.7K Data, 227.3K Total + Current Release: + Non-Debug Version: 80.9K Code, 17.7K Data, 98.6K Total + Debug Version: 158.7K Code, 64.8K Data, 223.5K Total + + +2) iASL Compiler/Disassembler and Tools: + +Implemented an ANSI C version of the acpixtract utility. This +version will automatically extract the DSDT and all SSDTs from +the input acpidump text file and dump the binary output to +separate files. It can also display a summary of the input file +including the headers for each table found and will extract any +single ACPI table, with any signature. (See +source/tools/acpixtract) + +---------------------------------------- +10 March 2006. Summary of changes for version 20060310: + +1) ACPI CA Core Subsystem: + +Tagged all external interfaces to the subsystem with the new +ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary +to assist kernel integration. For Linux, the macro resolves to +the EXPORT_SYMBOL macro. The default definition is NULL. + +Added the ACPI_THREAD_ID type for the return value from +AcpiOsGetThreadId. This allows the host to define this as +necessary to simplify kernel integration. The default definition +is ACPI_NATIVE_UINT. + +Fixed two interpreter problems related to error processing, the +deletion of objects, and placing invalid pointers onto the +internal operator result stack. BZ 6028, 6151 (Valery Podrezov) + +Increased the reference count threshold where a warning is +emitted for large reference counts in order to eliminate +unnecessary warnings on systems with large namespaces (especially +64-bit.) Increased the value from 0x400 to 0x800. + +Due to universal disagreement as to the meaning of the 'c' in the +calloc() function, the ACPI_MEM_CALLOCATE macro has been renamed +to ACPI_ALLOCATE_ZEROED so that the purpose of the interface is +'clear'. ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to +ACPI_ALLOCATE and ACPI_FREE. + +Code and Data Size: These are the sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 32-bit compiler. The +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release: + Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total + Debug Version: 161.4K Code, 65.7K Data, 227.1K Total + Current Release: + Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total + Debug Version: 161.6K Code, 65.7K Data, 227.3K Total + + +2) iASL Compiler/Disassembler: + +Disassembler: implemented support for symbolic resource +descriptor references. If a CreateXxxxField operator references a +fixed offset within a resource descriptor, a name is assigned to +the descriptor and the offset is translated to the appropriate +resource tag and pathname. The addition of this support brings +the disassembled code very close to the original ASL source code +and helps eliminate run-time errors when the disassembled code is +modified (and recompiled) in such a way as to invalidate the +original fixed offsets. + +Implemented support for a Descriptor Name as the last parameter +to the ASL Register() macro. This parameter was inadvertently +left out of the ACPI specification, and will be added for ACPI +3.0b. + +Fixed a problem where the use of the "_OSI" string (versus the +full path "\_OSI") caused an internal compiler error. ("No back +ptr to op") + +Fixed a problem with the error message that occurs when an +invalid string is used for a _HID object (such as one with an +embedded asterisk: "*PNP010A".) The correct message is now +displayed. + +---------------------------------------- +17 February 2006. Summary of changes for version 20060217: + +1) ACPI CA Core Subsystem: + +Implemented a change to the IndexField support to match the +behavior of the Microsoft AML interpreter. The value written to +the Index register is now a byte offset, no longer an index based +upon the width of the Data register. This should fix IndexField +problems seen on some machines where the Data register is not +exactly one byte wide. The ACPI specification will be clarified +on this point. + +Fixed a problem where several resource descriptor types could +overrun the internal descriptor buffer due to size +miscalculation: VendorShort, VendorLong, and Interrupt. This was +noticed on IA64 machines, but could affect all platforms. + +Fixed a problem where individual resource descriptors were +misaligned within the internal buffer, causing alignment faults +on IA64 platforms. + +Code and Data Size: These are the sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 32-bit compiler. The +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release: + Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total + Debug Version: 161.3K Code, 65.6K Data, 226.9K Total + Current Release: + Non-Debug Version: 81.0K Code, 17.8K Data, 98.8K Total + Debug Version: 161.4K Code, 65.7K Data, 227.1K Total + + +2) iASL Compiler/Disassembler: + +Implemented support for new reserved names: _WDG and _WED are +Microsoft extensions for Windows Instrumentation Management, _TDL +is a new ACPI-defined method (Throttling Depth Limit.) + +Fixed a problem where a zero-length VendorShort or VendorLong +resource descriptor was incorrectly emitted as a descriptor of +length one. + +---------------------------------------- +10 February 2006. Summary of changes for version 20060210: + +1) ACPI CA Core Subsystem: + +Removed a couple of extraneous ACPI_ERROR messages that appeared +during normal execution. These became apparent after the +conversion from ACPI_DEBUG_PRINT. + +Fixed a problem where the CreateField operator could hang if the +BitIndex or NumBits parameter referred to a named object. (Valery +Podrezov, BZ 5359) + +Fixed a problem where a DeRefOf operation on a buffer object +incorrectly failed with an exception. This also fixes a couple of +related RefOf and DeRefOf issues. (Valery Podrezov, BZ +5360/5392/5387) + +Fixed a problem where the AE_BUFFER_LIMIT exception was returned +instead of AE_STRING_LIMIT on an out-of-bounds Index() operation. +(Valery Podrezov, BZ 5480) + +Implemented a memory cleanup at the end of the execution of each +iteration of an AML While() loop, preventing the accumulation of +outstanding objects. (Valery Podrezov, BZ 5427) + +Eliminated a chunk of duplicate code in the object resolution +code. (Valery Podrezov, BZ 5336) + +Fixed several warnings during the 64-bit code generation. + +The AcpiSrc source code conversion tool now inserts one line of +whitespace after an if() statement that is followed immediately +by a comment, improving readability of the Linux code. + +Code and Data Size: The current and previous library sizes for +the core subsystem are shown below. These are the code and data +sizes for the acpica.lib produced by the Microsoft Visual C++ 6.0 +32-bit compiler. These values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a much larger code and data size. +Note that these values will vary depending on the efficiency of +the compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total + Debug Version: 161.3K Code, 65.7K Data, 227.0K Total + Current Release: + Non-Debug Version: 81.1K Code, 17.8K Data, 98.9K Total + Debug Version: 161.3K Code, 65.6K Data, 226.9K Total + + +2) iASL Compiler/Disassembler: + +Fixed a problem with the disassembly of a BankField operator with +a complex expression for the BankValue parameter. + +---------------------------------------- +27 January 2006. Summary of changes for version 20060127: + +1) ACPI CA Core Subsystem: + +Implemented support in the Resource Manager to allow unresolved +namestring references within resource package objects for the +_PRT method. This support is in addition to the previously +implemented unresolved reference support within the AML parser. +If the interpreter slack mode is enabled, these unresolved +references will be passed through to the caller as a NULL package +entry. + +Implemented and deployed new macros and functions for error and +warning messages across the subsystem. These macros are simpler +and generate less code than their predecessors. The new macros +ACPI_ERROR, ACPI_EXCEPTION, ACPI_WARNING, and ACPI_INFO replace +the ACPI_REPORT_* macros. The older macros remain defined to +allow ACPI drivers time to migrate to the new macros. + +Implemented the ACPI_CPU_FLAGS type to simplify host OS +integration of the Acquire/Release Lock OSL interfaces. + +Fixed a problem where Alias ASL operators are sometimes not +correctly resolved, in both the interpreter and the iASL +compiler. + +Fixed several problems with the implementation of the +ConcatenateResTemplate ASL operator. As per the ACPI +specification, zero length buffers are now treated as a single +EndTag. One-length buffers always cause a fatal exception. Non- +zero length buffers that do not end with a full 2-byte EndTag +cause a fatal exception. + +Fixed a possible structure overwrite in the AcpiGetObjectInfo +external interface. (With assistance from Thomas Renninger) + +Code and Data Size: The current and previous library sizes for +the core subsystem are shown below. These are the code and data +sizes for the acpica.lib produced by the Microsoft Visual C++ 6.0 +32-bit compiler. These values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a much larger code and data size. +Note that these values will vary depending on the efficiency of +the compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total + Debug Version: 163.2K Code, 66.2K Data, 229.4K Total + Current Release: + Non-Debug Version: 81.0K Code, 17.9K Data, 98.9K Total + Debug Version: 161.3K Code, 65.7K Data, 227.0K Total + + +2) iASL Compiler/Disassembler: + +Fixed an internal error that was generated for any forward +references to ASL Alias objects. + +---------------------------------------- +13 January 2006. Summary of changes for version 20060113: + +1) ACPI CA Core Subsystem: + +Added 2006 copyright to all module headers and signons. This +affects virtually every file in the ACPICA core subsystem, iASL +compiler, and the utilities. + +Enhanced the ACPICA error reporting in order to simplify user +migration to the non-debug version of ACPICA. Replaced all +instances of the ACPI_DEBUG_PRINT macro invoked at the +ACPI_DB_ERROR and ACPI_DB_WARN debug levels with the +ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros, respectively. +This preserves all error and warning messages in the non-debug +version of the ACPICA code (this has been referred to as the +"debug lite" option.) Over 200 cases were converted to create a +total of over 380 error/warning messages across the ACPICA code. +This increases the code and data size of the default non-debug +version of the code somewhat (about 13K), but all error/warning +reporting may be disabled if desired (and code eliminated) by +specifying the ACPI_NO_ERROR_MESSAGES compile-time configuration +option. The size of the debug version of ACPICA remains about the +same. + +Fixed a memory leak within the AML Debugger "Set" command. One +object was not properly deleted for every successful invocation +of the command. + +Code and Data Size: The current and previous library sizes for +the core subsystem are shown below. These are the code and data +sizes for the acpica.lib produced by the Microsoft Visual C++ 6.0 +32-bit compiler. These values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a much larger code and data size. +Note that these values will vary depending on the efficiency of +the compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total + Debug Version: 163.7K Code, 67.5K Data, 231.2K Total + Current Release: + Non-Debug Version: 83.1K Code, 18.4K Data, 101.5K Total + Debug Version: 163.2K Code, 66.2K Data, 229.4K Total + + +2) iASL Compiler/Disassembler: + +The compiler now officially supports the ACPI 3.0a specification +that was released on December 30, 2005. (Specification is +available at www.acpi.info) + +---------------------------------------- +16 December 2005. Summary of changes for version 20051216: + +1) ACPI CA Core Subsystem: + +Implemented optional support to allow unresolved names within ASL +Package objects. A null object is inserted in the package when a +named reference cannot be located in the current namespace. +Enabled via the interpreter slack flag, this should eliminate +AE_NOT_FOUND exceptions seen on machines that contain such code. + +Implemented an optimization to the initialization sequence that +can improve boot time. During ACPI device initialization, the +_STA method is now run if and only if the _INI method exists. The +_STA method is used to determine if the device is present; An +_INI can only be run if _STA returns present, but it is a waste +of time to run the _STA method if the _INI does not exist. +(Prototype and assistance from Dong Wei) + +Implemented use of the C99 uintptr_t for the pointer casting +macros if it is available in the current compiler. Otherwise, the +default (void *) cast is used as before. + +Fixed some possible memory leaks found within the execution path +of the Break, Continue, If, and CreateField operators. (Valery +Podrezov) + +Fixed a problem introduced in the 20051202 release where an +exception is generated during method execution if a control +method attempts to declare another method. + +Moved resource descriptor string constants that are used by both +the AML disassembler and AML debugger to the common utilities +directory so that these components are independent. + +Implemented support in the AcpiExec utility (-e switch) to +globally ignore exceptions during control method execution +(method is not aborted.) + +Added the rsinfo.c source file to the AcpiExec makefile for +Linux/Unix generation. + +Code and Data Size: The current and previous library sizes for +the core subsystem are shown below. These are the code and data +sizes for the acpica.lib produced by the Microsoft Visual C++ 6.0 +32-bit compiler. These values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a much larger code and data size. +Note that these values will vary depending on the efficiency of +the compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total + Debug Version: 163.2K Code, 67.4K Data, 230.6K Total + Current Release: + Non-Debug Version: 76.6K Code, 12.3K Data, 88.9K Total + Debug Version: 163.7K Code, 67.5K Data, 231.2K Total + + +2) iASL Compiler/Disassembler: + +Fixed a problem where a CPU stack overflow fault could occur if a +recursive method call was made from within a Return statement. + +---------------------------------------- +02 December 2005. Summary of changes for version 20051202: + +1) ACPI CA Core Subsystem: + +Modified the parsing of control methods to no longer create +namespace objects during the first pass of the parse. Objects are +now created only during the execute phase, at the moment the +namespace creation operator is encountered in the AML (Name, +OperationRegion, CreateByteField, etc.) This should eliminate +ALREADY_EXISTS exceptions seen on some machines where reentrant +control methods are protected by an AML mutex. The mutex will now +correctly block multiple threads from attempting to create the +same object more than once. + +Increased the number of available Owner Ids for namespace object +tracking from 32 to 255. This should eliminate the OWNER_ID_LIMIT +exceptions seen on some machines with a large number of ACPI +tables (either static or dynamic). + +Fixed a problem with the AcpiExec utility where a fault could +occur when the -b switch (batch mode) is used. + +Enhanced the namespace dump routine to output the owner ID for +each namespace object. + +Code and Data Size: The current and previous library sizes for +the core subsystem are shown below. These are the code and data +sizes for the acpica.lib produced by the Microsoft Visual C++ 6.0 +32-bit compiler. These values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a much larger code and data size. +Note that these values will vary depending on the efficiency of +the compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total + Debug Version: 163.0K Code, 67.4K Data, 230.4K Total + Current Release: + Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total + Debug Version: 163.2K Code, 67.4K Data, 230.6K Total + + +2) iASL Compiler/Disassembler: + +Fixed a parse error during compilation of certain Switch/Case +constructs. To simplify the parse, the grammar now allows for +multiple Default statements and this error is now detected and +flagged during the analysis phase. + +Disassembler: The disassembly now includes the contents of the +original table header within a comment at the start of the file. +This includes the name and version of the original ASL compiler. + +---------------------------------------- +17 November 2005. Summary of changes for version 20051117: + +1) ACPI CA Core Subsystem: + +Fixed a problem in the AML parser where the method thread count +could be decremented below zero if any errors occurred during the +method parse phase. This should eliminate AE_AML_METHOD_LIMIT +exceptions seen on some machines. This also fixed a related +regression with the mechanism that detects and corrects methods +that cannot properly handle reentrancy (related to the deployment +of the new OwnerId mechanism.) + +Eliminated the pre-parsing of control methods (to detect errors) +during table load. Related to the problem above, this was causing +unwind issues if any errors occurred during the parse, and it +seemed to be overkill. A table load should not be aborted if +there are problems with any single control method, thus rendering +this feature rather pointless. + +Fixed a problem with the new table-driven resource manager where +an internal buffer overflow could occur for small resource +templates. + +Implemented a new external interface, AcpiGetVendorResource. This +interface will find and return a vendor-defined resource +descriptor within a _CRS or _PRS method via an ACPI 3.0 UUID +match. With assistance from Bjorn Helgaas. + +Removed the length limit (200) on string objects as per the +upcoming ACPI 3.0A specification. This affects the following +areas of the interpreter: 1) any implicit conversion of a Buffer +to a String, 2) a String object result of the ASL Concatentate +operator, 3) the String object result of the ASL ToString +operator. + +Fixed a problem in the Windows OS interface layer (OSL) where a +WAIT_FOREVER on a semaphore object would incorrectly timeout. +This allows the multithreading features of the AcpiExec utility +to work properly under Windows. + +Updated the Linux makefiles for the iASL compiler and AcpiExec to +include the recently added file named "utresrc.c". + +Code and Data Size: The current and previous library sizes for +the core subsystem are shown below. These are the code and data +sizes for the acpica.lib produced by the Microsoft Visual C++ 6.0 +32-bit compiler. These values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a much larger code and data size. +Note that these values will vary depending on the efficiency of +the compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total + Debug Version: 163.0K Code, 67.4K Data, 230.4K Total + Current Release: + Non-Debug Version: 76.3K Code, 12.3K Data, 88.6K Total + Debug Version: 163.0K Code, 67.4K Data, 230.4K Total + + +2) iASL Compiler/Disassembler: + +Removed the limit (200) on string objects as per the upcoming +ACPI 3.0A specification. For the iASL compiler, this means that +string literals within the source ASL can be of any length. + +Enhanced the listing output to dump the AML code for resource +descriptors immediately after the ASL code for each descriptor, +instead of in a block at the end of the entire resource template. + +Enhanced the compiler debug output to dump the entire original +parse tree constructed during the parse phase, before any +transforms are applied to the tree. The transformed tree is +dumped also. + +---------------------------------------- +02 November 2005. Summary of changes for version 20051102: + +1) ACPI CA Core Subsystem: + +Modified the subsystem initialization sequence to improve GPE +support. The GPE initialization has been split into two parts in +order to defer execution of the _PRW methods (Power Resources for +Wake) until after the hardware is fully initialized and the SCI +handler is installed. This allows the _PRW methods to access +fields protected by the Global Lock. This will fix systems where +a NO_GLOBAL_LOCK exception has been seen during initialization. + +Converted the ACPI internal object disassemble and display code +within the AML debugger to fully table-driven operation, reducing +code size and increasing maintainability. + +Fixed a regression with the ConcatenateResTemplate() ASL operator +introduced in the 20051021 release. + +Implemented support for "local" internal ACPI object types within +the debugger "Object" command and the AcpiWalkNamespace external +interfaces. These local types include RegionFields, BankFields, +IndexFields, Alias, and reference objects. + +Moved common AML resource handling code into a new file, +"utresrc.c". This code is shared by both the Resource Manager and +the AML Debugger. + +Code and Data Size: The current and previous library sizes for +the core subsystem are shown below. These are the code and data +sizes for the acpica.lib produced by the Microsoft Visual C++ 6.0 +32-bit compiler. These values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a much larger code and data size. +Note that these values will vary depending on the efficiency of +the compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total + Debug Version: 163.5K Code, 67.0K Data, 230.5K Total + Current Release: + Non-Debug Version: 76.2K Code, 12.3K Data, 88.5K Total + Debug Version: 163.0K Code, 67.4K Data, 230.4K Total + + +2) iASL Compiler/Disassembler: + +Fixed a problem with very large initializer lists (more than 4000 +elements) for both Buffer and Package objects where the parse +stack could overflow. + +Enhanced the pre-compile source code scan for non-ASCII +characters to ignore characters within comment fields. The scan +is now always performed and is no longer optional, detecting +invalid characters within a source file immediately rather than +during the parse phase or later. + +Enhanced the ASL grammar definition to force early reductions on +all list-style grammar elements so that the overall parse stack +usage is greatly reduced. This should improve performance and +reduce the possibility of parse stack overflow. + +Eliminated all reduce/reduce conflicts in the iASL parser +generation. Also, with the addition of a %expected statement, the +compiler generates from source with no warnings. + +Fixed a possible segment fault in the disassembler if the input +filename does not contain a "dot" extension (Thomas Renninger). + +---------------------------------------- +21 October 2005. Summary of changes for version 20051021: + +1) ACPI CA Core Subsystem: + +Implemented support for the EM64T and other x86-64 processors. +This essentially entails recognizing that these processors +support non-aligned memory transfers. Previously, all 64-bit +processors were assumed to lack hardware support for non-aligned +transfers. + +Completed conversion of the Resource Manager to nearly full table- +driven operation. Specifically, the resource conversion code +(convert AML to internal format and the reverse) and the debug +code to dump internal resource descriptors are fully table- +driven, reducing code and data size and improving +maintainability. + +The OSL interfaces for Acquire and Release Lock now use a 64-bit +flag word on 64-bit processors instead of a fixed 32-bit word. +(With assistance from Alexey Starikovskiy) + +Implemented support within the resource conversion code for the +Type-Specific byte within the various ACPI 3.0 *WordSpace macros. + +Fixed some issues within the resource conversion code for the +type-specific flags for both Memory and I/O address resource +descriptors. For Memory, implemented support for the MTP and TTP +flags. For I/O, split the TRS and TTP flags into two separate +fields. + +Code and Data Size: The current and previous library sizes for +the core subsystem are shown below. These are the code and data +sizes for the acpica.lib produced by the Microsoft Visual C++ 6.0 +32-bit compiler. These values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a much larger code and data size. +Note that these values will vary depending on the efficiency of +the compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total + Debug Version: 168.0K Code, 68.3K Data, 236.3K Total + Current Release: + Non-Debug Version: 76.1K Code, 12.2K Data, 88.3K Total + Debug Version: 163.5K Code, 67.0K Data, 230.5K Total + + + +2) iASL Compiler/Disassembler: + +Relaxed a compiler restriction that disallowed a ResourceIndex +byte if the corresponding ResourceSource string was not also +present in a resource descriptor declaration. This restriction +caused problems with existing AML/ASL code that includes the +Index byte without the string. When such AML was disassembled, it +could not be compiled without modification. Further, the modified +code created a resource template with a different size than the +original, breaking code that used fixed offsets into the resource +template buffer. + +Removed a recent feature of the disassembler to ignore a lone +ResourceIndex byte. This byte is now emitted if present so that +the exact AML can be reproduced when the disassembled code is +recompiled. + +Improved comments and text alignment for the resource descriptor +code emitted by the disassembler. + +Implemented disassembler support for the ACPI 3.0 AccessSize +field within a Register() resource descriptor. + +---------------------------------------- +30 September 2005. Summary of changes for version 20050930: + +1) ACPI CA Core Subsystem: + +Completed a major overhaul of the Resource Manager code - +specifically, optimizations in the area of the AML/internal +resource conversion code. The code has been optimized to simplify +and eliminate duplicated code, CPU stack use has been decreased +by optimizing function parameters and local variables, and naming +conventions across the manager have been standardized for clarity +and ease of maintenance (this includes function, parameter, +variable, and struct/typedef names.) The update may force changes +in some driver code, depending on how resources are handled by +the host OS. + +All Resource Manager dispatch and information tables have been +moved to a single location for clarity and ease of maintenance. +One new file was created, named "rsinfo.c". + +The ACPI return macros (return_ACPI_STATUS, etc.) have been +modified to guarantee that the argument is not evaluated twice, +making them less prone to macro side-effects. However, since +there exists the possibility of additional stack use if a +particular compiler cannot optimize them (such as in the debug +generation case), the original macros are optionally available. +Note that some invocations of the return_VALUE macro may now +cause size mismatch warnings; the return_UINT8 and return_UINT32 +macros are provided to eliminate these. (From Randy Dunlap) + +Implemented a new mechanism to enable debug tracing for +individual control methods. A new external interface, +AcpiDebugTrace, is provided to enable this mechanism. The intent +is to allow the host OS to easily enable and disable tracing for +problematic control methods. This interface can be easily exposed +to a user or debugger interface if desired. See the file +psxface.c for details. + +AcpiUtCallocate will now return a valid pointer if a length of +zero is specified - a length of one is used and a warning is +issued. This matches the behavior of AcpiUtAllocate. + +Code and Data Size: The current and previous library sizes for +the core subsystem are shown below. These are the code and data +sizes for the acpica.lib produced by the Microsoft Visual C++ 6.0 +32-bit compiler. These values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a much larger code and data size. +Note that these values will vary depending on the efficiency of +the compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total + Debug Version: 168.1K Code, 68.4K Data, 236.5K Total + Current Release: + Non-Debug Version: 77.1K Code, 12.1K Data, 89.2K Total + Debug Version: 168.0K Code, 68.3K Data, 236.3K Total + + +2) iASL Compiler/Disassembler: + +A remark is issued if the effective compile-time length of a +package or buffer is zero. Previously, this was a warning. + +---------------------------------------- +16 September 2005. Summary of changes for version 20050916: + +1) ACPI CA Core Subsystem: + +Fixed a problem within the Resource Manager where support for the +Generic Register descriptor was not fully implemented. This +descriptor is now fully recognized, parsed, disassembled, and +displayed. + +Completely restructured the Resource Manager code to utilize +table-driven dispatch and lookup, eliminating many of the large +switch() statements. This reduces overall subsystem code size and +code complexity. Affects the resource parsing and construction, +disassembly, and debug dump output. + +Cleaned up and restructured the debug dump output for all +resource descriptors. Improved readability of the output and +reduced code size. + +Fixed a problem where changes to internal data structures caused +the optional ACPI_MUTEX_DEBUG code to fail compilation if +specified. + +Code and Data Size: The current and previous library sizes for +the core subsystem are shown below. These are the code and data +sizes for the acpica.lib produced by the Microsoft Visual C++ 6.0 +32-bit compiler. These values do not include any ACPI driver or +OSPM code. The debug version of the code includes the debug +output trace mechanism and has a much larger code and data size. +Note that these values will vary depending on the efficiency of +the compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total + Debug Version: 169.6K Code, 69.9K Data, 239.5K Total + Current Release: + Non-Debug Version: 77.5K Code, 12.0K Data, 89.5K Total + Debug Version: 168.1K Code, 68.4K Data, 236.5K Total + + +2) iASL Compiler/Disassembler: + +Updated the disassembler to automatically insert an +EndDependentFn() macro into the ASL stream if this macro is +missing in the original AML code, simplifying compilation of the +resulting ASL module. + +Fixed a problem in the disassembler where a disassembled +ResourceSource string (within a large resource descriptor) was +not surrounded by quotes and not followed by a comma, causing +errors when the resulting ASL module was compiled. Also, escape +sequences within a ResourceSource string are now handled +correctly (especially "\\") + +---------------------------------------- +02 September 2005. Summary of changes for version 20050902: + +1) ACPI CA Core Subsystem: + +Fixed a problem with the internal Owner ID allocation and +deallocation mechanisms for control method execution and +recursive method invocation. This should eliminate the +OWNER_ID_LIMIT exceptions and "Invalid OwnerId" messages seen on +some systems. Recursive method invocation depth is currently +limited to 255. (Alexey Starikovskiy) + +Completely eliminated all vestiges of support for the "module- +level executable code" until this support is fully implemented +and debugged. This should eliminate the NO_RETURN_VALUE +exceptions seen during table load on some systems that invoke +this support. + +Fixed a problem within the resource manager code where the +transaction flags for a 64-bit address descriptor were handled +incorrectly in the type-specific flag byte. + +Consolidated duplicate code within the address descriptor +resource manager code, reducing overall subsystem code size. + +Fixed a fault when using the AML debugger "disassemble" command +to disassemble individual control methods. + +Removed references to the "release_current" directory within the +Unix release package. + +Code and Data Size: The current and previous core subsystem +library sizes are shown below. These are the code and data sizes +for the acpica.lib produced by the Microsoft Visual C++ 6.0 +compiler. These values do not include any ACPI driver or OSPM +code. The debug version of the code includes the debug output +trace mechanism and has a much larger code and data size. Note +that these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total + Debug Version: 170.0K Code, 69.9K Data, 239.9K Total + Current Release: + Non-Debug Version: 78.4K Code, 11.8K Data, 90.2K Total + Debug Version: 169.6K Code, 69.9K Data, 239.5K Total + + +2) iASL Compiler/Disassembler: + +Implemented an error check for illegal duplicate values in the +interrupt and dma lists for the following ASL macros: Dma(), +Irq(), IrqNoFlags(), and Interrupt(). + +Implemented error checking for the Irq() and IrqNoFlags() macros +to detect too many values in the interrupt list (16 max) and +invalid values in the list (range 0 - 15) + +The maximum length string literal within an ASL file is now +restricted to 200 characters as per the ACPI specification. + +Fixed a fault when using the -ln option (generate namespace +listing). + +Implemented an error check to determine if a DescriptorName +within a resource descriptor has already been used within the +current scope. + +---------------------------------------- +15 August 2005. Summary of changes for version 20050815: + +1) ACPI CA Core Subsystem: + +Implemented a full bytewise compare to determine if a table load +request is attempting to load a duplicate table. The compare is +performed if the table signatures and table lengths match. This +will allow different tables with the same OEM Table ID and +revision to be loaded - probably against the ACPI specification, +but discovered in the field nonetheless. + +Added the changes.txt logfile to each of the zipped release +packages. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total + Debug Version: 167.0K Code, 69.9K Data, 236.9K Total + Current Release: + Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total + Debug Version: 170.0K Code, 69.9K Data, 239.9K Total + + +2) iASL Compiler/Disassembler: + +Fixed a problem where incorrect AML code could be generated for +Package objects if optimization is disabled (via the -oa switch). + +Fixed a problem with where incorrect AML code is generated for +variable-length packages when the package length is not specified +and the number of initializer values is greater than 255. + + +---------------------------------------- +29 July 2005. Summary of changes for version 20050729: + +1) ACPI CA Core Subsystem: + +Implemented support to ignore an attempt to install/load a +particular ACPI table more than once. Apparently there exists +BIOS code that repeatedly attempts to load the same SSDT upon +certain events. With assistance from Venkatesh Pallipadi. + +Restructured the main interface to the AML parser in order to +correctly handle all exceptional conditions. This will prevent +leakage of the OwnerId resource and should eliminate the +AE_OWNER_ID_LIMIT exceptions seen on some machines. With +assistance from Alexey Starikovskiy. + +Support for "module level code" has been disabled in this version +due to a number of issues that have appeared on various machines. +The support can be enabled by defining +ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem compilation. When +the issues are fully resolved, the code will be enabled by +default again. + +Modified the internal functions for debug print support to define +the FunctionName parameter as a (const char *) for compatibility +with compiler built-in macros such as __FUNCTION__, etc. + +Linted the entire ACPICA source tree for both 32-bit and 64-bit. + +Implemented support to display an object count summary for the +AML Debugger commands Object and Methods. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total + Debug Version: 170.0K Code, 69.7K Data, 239.7K Total + Current Release: + Non-Debug Version: 78.6K Code, 11.7K Data, 90.3K Total + Debug Version: 167.0K Code, 69.9K Data, 236.9K Total + + +2) iASL Compiler/Disassembler: + +Fixed a regression that appeared in the 20050708 version of the +compiler where an error message was inadvertently emitted for +invocations of the _OSI reserved control method. + +---------------------------------------- +08 July 2005. Summary of changes for version 20050708: + +1) ACPI CA Core Subsystem: + +The use of the CPU stack in the debug version of the subsystem +has been considerably reduced. Previously, a debug structure was +declared in every function that used the debug macros. This +structure has been removed in favor of declaring the individual +elements as parameters to the debug functions. This reduces the +cumulative stack use during nested execution of ACPI function +calls at the cost of a small increase in the code size of the +debug version of the subsystem. With assistance from Alexey +Starikovskiy and Len Brown. + +Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler- +dependent headers to define a macro that will return the current +function name at runtime (such as __FUNCTION__ or _func_, etc.) +The function name is used by the debug trace output. If +ACPI_GET_FUNCTION_NAME is not defined in the compiler-dependent +header, the function name is saved on the CPU stack (one pointer +per function.) This mechanism is used because apparently there +exists no standard ANSI-C defined macro that that returns the +function name. + +Redesigned and reimplemented the "Owner ID" mechanism used to +track namespace objects created/deleted by ACPI tables and +control method execution. A bitmap is now used to allocate and +free the IDs, thus solving the wraparound problem present in the +previous implementation. The size of the namespace node +descriptor was reduced by 2 bytes as a result (Alexey +Starikovskiy). + +Removed the UINT32_BIT and UINT16_BIT types that were used for +the bitfield flag definitions within the headers for the +predefined ACPI tables. These have been replaced by UINT8_BIT in +order to increase the code portability of the subsystem. If the +use of UINT8 remains a problem, we may be forced to eliminate +bitfields entirely because of a lack of portability. + +Enhanced the performance of the AcpiUtUpdateObjectReference +procedure. This is a frequently used function and this +improvement increases the performance of the entire subsystem +(Alexey Starikovskiy). + +Fixed several possible memory leaks and the inverse - premature +object deletion (Alexey Starikovskiy). + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total + Debug Version: 165.2K Code, 69.6K Data, 234.8K Total + Current Release: + Non-Debug Version: 78.6K Code, 11.6K Data, 90.2K Total + Debug Version: 170.0K Code, 69.7K Data, 239.7K Total + +---------------------------------------- +24 June 2005. Summary of changes for version 20050624: + +1) ACPI CA Core Subsystem: + +Modified the new OSL cache interfaces to use ACPI_CACHE_T as the +type for the host-defined cache object. This allows the OSL +implementation to define and type this object in any manner +desired, simplifying the OSL implementation. For example, +ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be +defined in the OS-specific header file for other operating +systems as required. + +Changed the interface to AcpiOsAcquireObject to directly return +the requested object as the function return (instead of +ACPI_STATUS.) This change was made for performance reasons, since +this is the purpose of the interface in the first place. +AcpiOsAcquireObject is now similar to the AcpiOsAllocate +interface. + +Implemented a new AML debugger command named Businfo. This +command displays information about all devices that have an +associate _PRT object. The _ADR, _HID, _UID, and _CID are +displayed for these devices. + +Modified the initialization sequence in AcpiInitializeSubsystem +to call the OSL interface AcpiOslInitialize first, before any +local initialization. This change was required because the global +initialization now calls OSL interfaces. + +Enhanced the Dump command to display the entire contents of +Package objects (including all sub-objects and their values.) + +Restructured the code base to split some files because of size +and/or because the code logically belonged in a separate file. +New files are listed below. All makefiles and project files +included in the ACPI CA release have been updated. + utilities/utcache.c /* Local cache interfaces */ + utilities/utmutex.c /* Local mutex support */ + utilities/utstate.c /* State object support */ + interpreter/parser/psloop.c /* Main AML parse loop */ + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total + Debug Version: 164.0K Code, 69.1K Data, 233.1K Total + Current Release: + Non-Debug Version: 78.6K Code, 11.5K Data, 90.1K Total + Debug Version: 165.2K Code, 69.6K Data, 234.8K Total + + +2) iASL Compiler/Disassembler: + +Fixed a regression introduced in version 20050513 where the use +of a Package object within a Case() statement caused a compile +time exception. The original behavior has been restored (a +Match() operator is emitted.) + +---------------------------------------- +17 June 2005. Summary of changes for version 20050617: + +1) ACPI CA Core Subsystem: + +Moved the object cache operations into the OS interface layer +(OSL) to allow the host OS to handle these operations if desired +(for example, the Linux OSL will invoke the slab allocator). This +support is optional; the compile time define ACPI_USE_LOCAL_CACHE +may be used to utilize the original cache code in the ACPI CA +core. The new OSL interfaces are shown below. See utalloc.c for +an example implementation, and acpiosxf.h for the exact interface +definitions. With assistance from Alexey Starikovskiy. + AcpiOsCreateCache + AcpiOsDeleteCache + AcpiOsPurgeCache + AcpiOsAcquireObject + AcpiOsReleaseObject + +Modified the interfaces to AcpiOsAcquireLock and +AcpiOsReleaseLock to return and restore a flags parameter. This +fits better with many OS lock models. Note: the current execution +state (interrupt handler or not) is no longer passed to these +interfaces. If necessary, the OSL must determine this state by +itself, a simple and fast operation. With assistance from Alexey +Starikovskiy. + +Fixed a problem in the ACPI table handling where a valid XSDT was +assumed present if the revision of the RSDP was 2 or greater. +According to the ACPI specification, the XSDT is optional in all +cases, and the table manager therefore now checks for both an +RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is +used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. + +Fixed an interpreter problem with the Mid() operator in the case +of an input string where the resulting output string is of zero +length. It now correctly returns a valid, null terminated string +object instead of a string object with a null pointer. + +Fixed a problem with the control method argument handling to +allow a store to an Arg object that already contains an object of +type Device. The Device object is now correctly overwritten. +Previously, an error was returned. + + +Enhanced the debugger Find command to emit object values in +addition to the found object pathnames. The output format is the +same as the dump namespace command. + +Enhanced the debugger Set command. It now has the ability to set +the value of any Named integer object in the namespace +(Previously, only method locals and args could be set.) + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total + Debug Version: 164.0K Code, 69.3K Data, 233.3K Total + Current Release: + Non-Debug Version: 78.3K Code, 11.6K Data, 89.9K Total + Debug Version: 164.0K Code, 69.1K Data, 233.1K Total + + +2) iASL Compiler/Disassembler: + +Fixed a regression in the disassembler where if/else/while +constructs were output incorrectly. This problem was introduced +in the previous release (20050526). This problem also affected +the single-step disassembly in the debugger. + +Fixed a problem where compiling the reserved _OSI method would +randomly (but rarely) produce compile errors. + +Enhanced the disassembler to emit compilable code in the face of +incorrect AML resource descriptors. If the optional +ResourceSourceIndex is present, but the ResourceSource is not, do +not emit the ResourceSourceIndex in the disassembly. Otherwise, +the resulting code cannot be compiled without errors. + +---------------------------------------- +26 May 2005. Summary of changes for version 20050526: + +1) ACPI CA Core Subsystem: + +Implemented support to execute Type 1 and Type 2 AML opcodes +appearing at the module level (not within a control method.) +These opcodes are executed exactly once at the time the table is +loaded. This type of code was legal up until the release of ACPI +2.0B (2002) and is now supported within ACPI CA in order to +provide backwards compatibility with earlier BIOS +implementations. This eliminates the "Encountered executable code +at module level" warning that was previously generated upon +detection of such code. + +Fixed a problem in the interpreter where an AE_NOT_FOUND +exception could inadvertently be generated during the lookup of +namespace objects in the second pass parse of ACPI tables and +control methods. It appears that this problem could occur during +the resolution of forward references to namespace objects. + +Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex +function, corresponding to the same #ifdef in the +AcpiUtAcquireMutex function. This allows the deadlock detection +debug code to be compiled out in the normal case, improving mutex +performance (and overall subsystem performance) considerably. + +Implemented a handful of miscellaneous fixes for possible memory +leaks on error conditions and error handling control paths. These +fixes were suggested by FreeBSD and the Coverity Prevent source +code analysis tool. + +Added a check for a null RSDT pointer in AcpiGetFirmwareTable +(tbxfroot.c) to prevent a fault in this error case. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total + Debug Version: 163.7K Code, 69.3K Data, 233.0K Total + Current Release: + Non-Debug Version: 78.1K Code, 11.6K Data, 89.7K Total + Debug Version: 164.0K Code, 69.3K Data, 233.3K Total + + +2) iASL Compiler/Disassembler: + +Implemented support to allow Type 1 and Type 2 ASL operators to +appear at the module level (not within a control method.) These +operators will be executed once at the time the table is loaded. +This type of code was legal up until the release of ACPI 2.0B +(2002) and is now supported by the iASL compiler in order to +provide backwards compatibility with earlier BIOS ASL code. + +The ACPI integer width (specified via the table revision ID or +the -r override, 32 or 64 bits) is now used internally during +compile-time constant folding to ensure that constants are +truncated to 32 bits if necessary. Previously, the revision ID +value was only emitted in the AML table header. + +An error message is now generated for the Mutex and Method +operators if the SyncLevel parameter is outside the legal range +of 0 through 15. + +Fixed a problem with the Method operator ParameterTypes list +handling (ACPI 3.0). Previously, more than 2 types or 2 arguments +generated a syntax error. The actual underlying implementation +of method argument typechecking is still under development, +however. + +---------------------------------------- +13 May 2005. Summary of changes for version 20050513: + +1) ACPI CA Core Subsystem: + +Implemented support for PCI Express root bridges -- added support +for device PNP0A08 in the root bridge search within +AcpiEvPciConfigRegionSetup. + +The interpreter now automatically truncates incoming 64-bit +constants to 32 bits if currently executing out of a 32-bit ACPI +table (Revision < 2). This also affects the iASL compiler +constant folding. (Note: as per below, the iASL compiler no +longer allows 64-bit constants within 32-bit tables.) + +Fixed a problem where string and buffer objects with "static" +pointers (pointers to initialization data within an ACPI table) +were not handled consistently. The internal object copy operation +now always copies the data to a newly allocated buffer, +regardless of whether the source object is static or not. + +Fixed a problem with the FromBCD operator where an implicit +result conversion was improperly performed while storing the +result to the target operand. Since this is an "explicit +conversion" operator, the implicit conversion should never be +performed on the output. + +Fixed a problem with the CopyObject operator where a copy to an +existing named object did not always completely overwrite the +existing object stored at name. Specifically, a buffer-to-buffer +copy did not delete the existing buffer. + +Replaced "InterruptLevel" with "InterruptNumber" in all GPE +interfaces and structs for consistency. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total + Debug Version: 163.7K Code, 69.3K Data, 233.0K Total + Current Release: (Same sizes) + Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total + Debug Version: 163.7K Code, 69.3K Data, 233.0K Total + + +2) iASL Compiler/Disassembler: + +The compiler now emits a warning if an attempt is made to +generate a 64-bit integer constant from within a 32-bit ACPI +table (Revision < 2). The integer is truncated to 32 bits. + +Fixed a problem with large package objects: if the static length +of the package is greater than 255, the "variable length package" +opcode is emitted. Previously, this caused an error. This +requires an update to the ACPI spec, since it currently +(incorrectly) states that packages larger than 255 elements are +not allowed. + +The disassembler now correctly handles variable length packages +and packages larger than 255 elements. + +---------------------------------------- +08 April 2005. Summary of changes for version 20050408: + +1) ACPI CA Core Subsystem: + +Fixed three cases in the interpreter where an "index" argument to +an ASL function was still (internally) 32 bits instead of the +required 64 bits. This was the Index argument to the Index, Mid, +and Match operators. + +The "strupr" function is now permanently local (AcpiUtStrupr), +since this is not a POSIX-defined function and not present in +most kernel-level C libraries. All references to the C library +strupr function have been removed from the headers. + +Completed the deployment of static functions/prototypes. All +prototypes with the static attribute have been moved from the +headers to the owning C file. + +Implemented an extract option (-e) for the AcpiBin utility (AML +binary utility). This option allows the utility to extract +individual ACPI tables from the output of AcpiDmp. It provides +the same functionality of the acpixtract.pl perl script without +the worry of setting the correct perl options. AcpiBin runs on +Windows and has not yet been generated/validated in the +Linux/Unix environment (but should be soon). + +Updated and fixed the table dump option for AcpiBin (-d). This +option converts a single ACPI table to a hex/ascii file, similar +to the output of AcpiDmp. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total + Debug Version: 163.5K Code, 69.3K Data, 232.8K Total + Current Release: + Non-Debug Version: 78.2K Code, 11.6K Data, 89.8K Total + Debug Version: 163.7K Code, 69.3K Data, 233.0K Total + + +2) iASL Compiler/Disassembler: + +Disassembler fix: Added a check to ensure that the table length +found in the ACPI table header within the input file is not +longer than the actual input file size. This indicates some kind +of file or table corruption. + +---------------------------------------- +29 March 2005. Summary of changes for version 20050329: + +1) ACPI CA Core Subsystem: + +An error is now generated if an attempt is made to create a +Buffer Field of length zero (A CreateField with a length operand +of zero.) + +The interpreter now issues a warning whenever executable code at +the module level is detected during ACPI table load. This will +give some idea of the prevalence of this type of code. + +Implemented support for references to named objects (other than +control methods) within package objects. + +Enhanced package object output for the debug object. Package +objects are now completely dumped, showing all elements. + +Enhanced miscellaneous object output for the debug object. Any +object can now be written to the debug object (for example, a +device object can be written, and the type of the object will be +displayed.) + +The "static" qualifier has been added to all local functions +across both the core subsystem and the iASL compiler. + +The number of "long" lines (> 80 chars) within the source has +been significantly reduced, by about 1/3. + +Cleaned up all header files to ensure that all CA/iASL functions +are prototyped (even static functions) and the formatting is +consistent. + +Two new header files have been added, acopcode.h and acnames.h. + +Removed several obsolete functions that were no longer used. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total + Debug Version: 165.4K Code, 69.7K Data, 236.1K Total + Current Release: + Non-Debug Version: 78.0K Code, 11.6K Data, 89.6K Total + Debug Version: 163.5K Code, 69.3K Data, 232.8K Total + + + +2) iASL Compiler/Disassembler: + +Fixed a problem with the resource descriptor generation/support. +For the ResourceSourceIndex and the ResourceSource fields, both +must be present, or both must be not present - can't have one +without the other. + +The compiler now returns non-zero from the main procedure if any +errors have occurred during the compilation. + + +---------------------------------------- +09 March 2005. Summary of changes for version 20050309: + +1) ACPI CA Core Subsystem: + +The string-to-buffer implicit conversion code has been modified +again after a change to the ACPI specification. In order to +match the behavior of the other major ACPI implementation, the +target buffer is no longer truncated if the source string is +smaller than an existing target buffer. This change requires an +update to the ACPI spec, and should eliminate the recent +AE_AML_BUFFER_LIMIT issues. + +The "implicit return" support was rewritten to a new algorithm +that solves the general case. Rather than attempt to determine +when a method is about to exit, the result of every ASL operator +is saved momentarily until the very next ASL operator is +executed. Therefore, no matter how the method exits, there will +always be a saved implicit return value. This feature is only +enabled with the AcpiGbl_EnableInterpreterSlack flag, and should +eliminate AE_AML_NO_RETURN_VALUE errors when enabled. + +Implemented implicit conversion support for the predicate +(operand) of the If, Else, and While operators. String and Buffer +arguments are automatically converted to Integers. + +Changed the string-to-integer conversion behavior to match the +new ACPI errata: "If no integer object exists, a new integer is +created. The ASCII string is interpreted as a hexadecimal +constant. Each string character is interpreted as a hexadecimal +value (`0'-`9', `A'-`F', `a', `f'), starting with the first +character as the most significant digit, and ending with the +first non-hexadecimal character or end-of-string." This means +that the first non-hex character terminates the conversion and +this is the code that was changed. + +Fixed a problem where the ObjectType operator would fail (fault) +when used on an Index of a Package which pointed to a null +package element. The operator now properly returns zero +(Uninitialized) in this case. + +Fixed a problem where the While operator used excessive memory by +not properly popping the result stack during execution. There was +no memory leak after execution, however. (Code provided by Valery +Podrezov.) + +Fixed a problem where references to control methods within +Package objects caused the method to be invoked, instead of +producing a reference object pointing to the method. + +Restructured and simplified the pswalk.c module +(AcpiPsDeleteParseTree) to improve performance and reduce code +size. (Code provided by Alexey Starikovskiy.) + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total + Debug Version: 165.4K Code, 69.6K Data, 236.0K Total + Current Release: + Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total + Debug Version: 165.4K Code, 69.7K Data, 236.1K Total + + +2) iASL Compiler/Disassembler: + +Fixed a problem with the Return operator with no arguments. Since +the AML grammar for the byte encoding requires an operand for the +Return opcode, the compiler now emits a Return(Zero) for this +case. An ACPI specification update has been written for this +case. + +For tables other than the DSDT, namepath optimization is +automatically disabled. This is because SSDTs can be loaded +anywhere in the namespace, the compiler has no knowledge of +where, and thus cannot optimize namepaths. + +Added "ProcessorObj" to the ObjectTypeKeyword list. This object +type was inadvertently omitted from the ACPI specification, and +will require an update to the spec. + +The source file scan for ASCII characters is now optional (-a). +This change was made because some vendors place non-ascii +characters within comments. However, the scan is simply a brute- +force byte compare to ensure all characters in the file are in +the range 0x00 to 0x7F. + +Fixed a problem with the CondRefOf operator where the compiler +was inappropriately checking for the existence of the target. +Since the point of the operator is to check for the existence of +the target at run-time, the compiler no longer checks for the +target existence. + +Fixed a problem where errors generated from the internal AML +interpreter during constant folding were not handled properly, +causing a fault. + +Fixed a problem with overly aggressive range checking for the +Stall operator. The valid range (max 255) is now only checked if +the operand is of type Integer. All other operand types cannot be +statically checked. + +Fixed a problem where control method references within the RefOf, +DeRefOf, and ObjectType operators were not treated properly. They +are now treated as actual references, not method invocations. + +Fixed and enhanced the "list namespace" option (-ln). This option +was broken a number of releases ago. + +Improved error handling for the Field, IndexField, and BankField +operators. The compiler now cleanly reports and recovers from +errors in the field component (FieldUnit) list. + +Fixed a disassembler problem where the optional +ResourceDescriptor fields TRS and TTP were not always handled +correctly. + +Disassembler - Comments in output now use "//" instead of "/*" + +---------------------------------------- +28 February 2005. Summary of changes for version 20050228: + +1) ACPI CA Core Subsystem: + +Fixed a problem where the result of an Index() operator (an +object reference) must increment the reference count on the +target object for the life of the object reference. + +Implemented AML Interpreter and Debugger support for the new ACPI +3.0 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, +and WordSpace resource descriptors. + +Implemented support in the _OSI method for the ACPI 3.0 "Extended +Address Space Descriptor" string, indicating interpreter support +for the descriptors above. + +Implemented header support for the new ACPI 3.0 FADT flag bits. + +Implemented header support for the new ACPI 3.0 PCI Express bits +for the PM1 status/enable registers. + +Updated header support for the MADT processor local Apic struct +and MADT platform interrupt source struct for new ACPI 3.0 +fields. + +Implemented header support for the SRAT and SLIT ACPI tables. + +Implemented the -s switch in AcpiExec to enable the +"InterpreterSlack" flag at runtime. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total + Debug Version: 164.9K Code, 69.2K Data, 234.1K Total + Current Release: + Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total + Debug Version: 165.4K Code, 69.6K Data, 236.0K Total + + +2) iASL Compiler/Disassembler: + +Fixed a problem with the internal 64-bit String-to-integer +conversion with strings less than two characters long. + +Fixed a problem with constant folding where the result of the +Index() operator can not be considered a constant. This means +that Index() cannot be a type3 opcode and this will require an +update to the ACPI specification. + +Disassembler: Implemented support for the TTP, MTP, and TRS +resource descriptor fields. These fields were inadvertently +ignored and not output in the disassembly of the resource +descriptor. + + + ---------------------------------------- +11 February 2005. Summary of changes for version 20050211: + +1) ACPI CA Core Subsystem: + +Implemented ACPI 3.0 support for implicit conversion within the +Match() operator. MatchObjects can now be of type integer, +buffer, or string instead of just type integer. Package elements +are implicitly converted to the type of the MatchObject. This +change aligns the behavior of Match() with the behavior of the +other logical operators (LLess(), etc.) It also requires an +errata change to the ACPI specification as this support was +intended for ACPI 3.0, but was inadvertently omitted. + +Fixed a problem with the internal implicit "to buffer" +conversion. Strings that are converted to buffers will cause +buffer truncation if the string is smaller than the target +buffer. Integers that are converted to buffers will not cause +buffer truncation, only zero extension (both as per the ACPI +spec.) The problem was introduced when code was added to truncate +the buffer, but this should not be performed in all cases, only +the string case. + +Fixed a problem with the Buffer and Package operators where the +interpreter would get confused if two such operators were used as +operands to an ASL operator (such as +LLess(Buffer(1){0},Buffer(1){1}). The internal result stack was +not being popped after the execution of these operators, +resulting in an AE_NO_RETURN_VALUE exception. + +Fixed a problem with constructs of the form +Store(Index(...),...). The reference object returned from Index +was inadvertently resolved to an actual value. This problem was +introduced in version 20050114 when the behavior of Store() was +modified to restrict the object types that can be used as the +source operand (to match the ACPI specification.) + +Reduced excessive stack use within the AcpiGetObjectInfo +procedure. + +Added a fix to aclinux.h to allow generation of AcpiExec on +Linux. + +Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS +struct. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total + Debug Version: 164.8K Code, 69.2K Data, 234.0K Total + Current Release: + Non-Debug Version: 78.2K Code, 11.5K Data, 89.7K Total + Debug Version: 164.9K Code, 69.2K Data, 234.1K Total + + +2) iASL Compiler/Disassembler: + +Fixed a code generation problem in the constant folding +optimization code where incorrect code was generated if a +constant was reduced to a buffer object (i.e., a reduced type 5 +opcode.) + +Fixed a typechecking problem for the ToBuffer operator. Caused by +an incorrect return type in the internal opcode information +table. + +---------------------------------------- +25 January 2005. Summary of changes for version 20050125: + +1) ACPI CA Core Subsystem: + +Fixed a recently introduced problem with the Global Lock where +the underlying semaphore was not created. This problem was +introduced in version 20050114, and caused an AE_AML_NO_OPERAND +exception during an Acquire() operation on _GL. + +The local object cache is now optional, and is disabled by +default. Both AcpiExec and the iASL compiler enable the cache +because they run in user mode and this enhances their +performance. #define ACPI_ENABLE_OBJECT_CACHE to enable the local +cache. + +Fixed an issue in the internal function AcpiUtEvaluateObject +concerning the optional "implicit return" support where an error +was returned if no return object was expected, but one was +implicitly returned. AE_OK is now returned in this case and the +implicitly returned object is deleted. AcpiUtEvaluateObject is +only occasionally used, and only to execute reserved methods such +as _STA and _INI where the return type is known up front. + +Fixed a few issues with the internal convert-to-integer code. It +now returns an error if an attempt is made to convert a null +string, a string of only blanks/tabs, or a zero-length buffer. +This affects both implicit conversion and explicit conversion via +the ToInteger() operator. + +The internal debug code in AcpiUtAcquireMutex has been commented +out. It is not needed for normal operation and should increase +the performance of the entire subsystem. The code remains in case +it is needed for debug purposes again. + +The AcpiExec source and makefile are included in the Unix/Linux +package for the first time. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total + Debug Version: 165.4K Code, 69.4K Data, 234.8K Total + Current Release: + Non-Debug Version: 78.1K Code, 11.5K Data, 89.6K Total + Debug Version: 164.8K Code, 69.2K Data, 234.0K Total + +2) iASL Compiler/Disassembler: + +Switch/Case support: A warning is now issued if the type of the +Switch value cannot be determined at compile time. For example, +Switch(Arg0) will generate the warning, and the type is assumed +to be an integer. As per the ACPI spec, use a construct such as +Switch(ToInteger(Arg0)) to eliminate the warning. + +Switch/Case support: Implemented support for buffer and string +objects as the switch value. This is an ACPI 3.0 feature, now +that LEqual supports buffers and strings. + +Switch/Case support: The emitted code for the LEqual() +comparisons now uses the switch value as the first operand, not +the second. The case value is now the second operand, and this +allows the case value to be implicitly converted to the type of +the switch value, not the other way around. + +Switch/Case support: Temporary variables are now emitted +immediately within the control method, not at the global level. +This means that there are now 36 temps available per-method, not +36 temps per-module as was the case with the earlier +implementation (_T_0 through _T_9 and _T_A through _T_Z.) + +---------------------------------------- +14 January 2005. Summary of changes for version 20050114: + +Added 2005 copyright to all module headers. This affects every +module in the core subsystem, iASL compiler, and the utilities. + +1) ACPI CA Core Subsystem: + +Fixed an issue with the String-to-Buffer conversion code where +the string null terminator was not included in the buffer after +conversion, but there is existing ASL that assumes the string +null terminator is included. This is the root of the +ACPI_AML_BUFFER_LIMIT regression. This problem was introduced in +the previous version when the code was updated to correctly set +the converted buffer size as per the ACPI specification. The ACPI +spec is ambiguous and will be updated to specify that the null +terminator must be included in the converted buffer. This also +affects the ToBuffer() ASL operator. + +Fixed a problem with the Mid() ASL/AML operator where it did not +work correctly on Buffer objects. Newly created sub-buffers were +not being marked as initialized. + + +Fixed a problem in AcpiTbFindTable where incorrect string +compares were performed on the OemId and OemTableId table header +fields. These fields are not null terminated, so strncmp is now +used instead of strcmp. + +Implemented a restriction on the Store() ASL/AML operator to +align the behavior with the ACPI specification. Previously, any +object could be used as the source operand. Now, the only +objects that may be used are Integers, Buffers, Strings, +Packages, Object References, and DDB Handles. If necessary, the +original behavior can be restored by enabling the +EnableInterpreterSlack flag. + +Enhanced the optional "implicit return" support to allow an +implicit return value from methods that are invoked externally +via the AcpiEvaluateObject interface. This enables implicit +returns from the _STA and _INI methods, for example. + +Changed the Revision() ASL/AML operator to return the current +version of the AML interpreter, in the YYYYMMDD format. +Previously, it incorrectly returned the supported ACPI version +(This is the function of the _REV method). + +Updated the _REV predefined method to return the currently +supported version of ACPI, now 3. + +Implemented batch mode option for the AcpiExec utility (-b). + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total + Debug Version: 165.3K Code, 69.4K Data, 234.7K Total + Current Release: + Non-Debug Version: 78.4K Code, 11.5K Data, 89.9K Total + Debug Version: 165.4K Code, 69.4K Data, 234.8K Total + +---------------------------------------- +10 December 2004. Summary of changes for version 20041210: + +ACPI 3.0 support is nearing completion in both the iASL compiler +and the ACPI CA core subsystem. + +1) ACPI CA Core Subsystem: + +Fixed a problem in the ToDecimalString operator where the +resulting string length was incorrectly calculated. The length is +now calculated exactly, eliminating incorrect AE_STRING_LIMIT +exceptions. + +Fixed a problem in the ToHexString operator to allow a maximum +200 character string to be produced. + +Fixed a problem in the internal string-to-buffer and buffer-to- +buffer copy routine where the length of the resulting buffer was +not truncated to the new size (if the target buffer already +existed). + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total + Debug Version: 164.7K Code, 68.5K Data, 233.2K Total + Current Release: + Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total + Debug Version: 165.3K Code, 69.4K Data, 234.7K Total + + +2) iASL Compiler/Disassembler: + +Implemented the new ACPI 3.0 resource template macros - +DWordSpace, ExtendedIO, ExtendedMemory, ExtendedSpace, +QWordSpace, and WordSpace. Includes support in the disassembler. + +Implemented support for the new (ACPI 3.0) parameter to the +Register macro, AccessSize. + +Fixed a problem where the _HE resource name for the Interrupt +macro was referencing bit 0 instead of bit 1. + +Implemented check for maximum 255 interrupts in the Interrupt +macro. + +Fixed a problem with the predefined resource descriptor names +where incorrect AML code was generated if the offset within the +resource buffer was 0 or 1. The optimizer shortened the AML code +to a single byte opcode but did not update the surrounding +package lengths. + +Changes to the Dma macro: All channels within the channel list +must be in the range 0-7. Maximum 8 channels can be specified. +BusMaster operand is optional (default is BusMaster). + +Implemented check for maximum 7 data bytes for the VendorShort +macro. + +The ReadWrite parameter is now optional for the Memory32 and +similar macros. + +---------------------------------------- +03 December 2004. Summary of changes for version 20041203: + +1) ACPI CA Core Subsystem: + +The low-level field insertion/extraction code (exfldio) has been +completely rewritten to eliminate unnecessary complexity, bugs, +and boundary conditions. + +Fixed a problem in the ToInteger, ToBuffer, ToHexString, and +ToDecimalString operators where the input operand could be +inadvertently deleted if no conversion was necessary (e.g., if +the input to ToInteger was an Integer object.) + +Fixed a problem with the ToDecimalString and ToHexString where an +incorrect exception code was returned if the resulting string +would be > 200 chars. AE_STRING_LIMIT is now returned. + +Fixed a problem with the Concatenate operator where AE_OK was +always returned, even if the operation failed. + +Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > +128 semaphores to be allocated. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total + Debug Version: 165.2K Code, 68.6K Data, 233.8K Total + Current Release: + Non-Debug Version: 78.3K Code, 11.5K Data, 89.8K Total + Debug Version: 164.7K Code, 68.5K Data, 233.2K Total + + +2) iASL Compiler/Disassembler: + +Fixed typechecking for the ObjectType and SizeOf operators. +Problem was recently introduced in 20041119. + +Fixed a problem with the ToUUID macro where the upper nybble of +each buffer byte was inadvertently set to zero. + +---------------------------------------- +19 November 2004. Summary of changes for version 20041119: + +1) ACPI CA Core Subsystem: + +Fixed a problem in the internal ConvertToInteger routine where +new integers were not truncated to 32 bits for 32-bit ACPI +tables. This routine converts buffers and strings to integers. + +Implemented support to store a value to an Index() on a String +object. This is an ACPI 2.0 feature that had not yet been +implemented. + +Implemented new behavior for storing objects to individual +package elements (via the Index() operator). The previous +behavior was to invoke the implicit conversion rules if an object +was already present at the index. The new behavior is to simply +delete any existing object and directly store the new object. +Although the ACPI specification seems unclear on this subject, +other ACPI implementations behave in this manner. (This is the +root of the AE_BAD_HEX_CONSTANT issue.) + +Modified the RSDP memory scan mechanism to support the extended +checksum for ACPI 2.0 (and above) RSDPs. Note that the search +continues until a valid RSDP signature is found with a valid +checksum. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total + Debug Version: 165.2K Code, 68.6K Data, 233.8K Total + Current Release: + Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total + Debug Version: 165.2K Code, 68.6K Data, 233.8K Total + + +2) iASL Compiler/Disassembler: + +Fixed a missing semicolon in the aslcompiler.y file. + +---------------------------------------- +05 November 2004. Summary of changes for version 20041105: + +1) ACPI CA Core Subsystem: + +Implemented support for FADT revision 2. This was an interim +table (between ACPI 1.0 and ACPI 2.0) that adds support for the +FADT reset register. + +Implemented optional support to allow uninitialized LocalX and +ArgX variables in a control method. The variables are +initialized to an Integer object with a value of zero. This +support is enabled by setting the AcpiGbl_EnableInterpreterSlack +flag to TRUE. + +Implemented support for Integer objects for the SizeOf operator. +Either 4 or 8 is returned, depending on the current integer size +(32-bit or 64-bit, depending on the parent table revision). + +Fixed a problem in the implementation of the SizeOf and +ObjectType operators where the operand was resolved to a value +too early, causing incorrect return values for some objects. + +Fixed some possible memory leaks during exceptional conditions. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total + Debug Version: 164.8K Code, 68.6K Data, 233.4K Total + Current Release: + Non-Debug Version: 78.5K Code, 11.5K Data, 90.0K Total + Debug Version: 165.2K Code, 68.6K Data, 233.8K Total + + +2) iASL Compiler/Disassembler: + +Implemented support for all ACPI 3.0 reserved names and methods. + +Implemented all ACPI 3.0 grammar elements in the front-end, +including support for semicolons. + +Implemented the ACPI 3.0 Function() and ToUUID() macros + +Fixed a problem in the disassembler where a Scope() operator +would not be emitted properly if the target of the scope was in +another table. + +---------------------------------------- +15 October 2004. Summary of changes for version 20041015: + +Note: ACPI CA is currently undergoing an in-depth and complete +formal evaluation to test/verify the following areas. Other +suggestions are welcome. This will result in an increase in the +frequency of releases and the number of bug fixes in the next few +months. + - Functional tests for all ASL/AML operators + - All implicit/explicit type conversions + - Bit fields and operation regions + - 64-bit math support and 32-bit-only "truncated" math support + - Exceptional conditions, both compiler and interpreter + - Dynamic object deletion and memory leaks + - ACPI 3.0 support when implemented + - External interfaces to the ACPI subsystem + + +1) ACPI CA Core Subsystem: + +Fixed two alignment issues on 64-bit platforms - within debug +statements in AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed +references to the Address field within the non-aligned ACPI +generic address structure. + +Fixed a problem in the Increment and Decrement operators where +incorrect operand resolution could result in the inadvertent +modification of the original integer when the integer is passed +into another method as an argument and the arg is then +incremented/decremented. + +Fixed a problem in the FromBCD operator where the upper 32-bits +of a 64-bit BCD number were truncated during conversion. + +Fixed a problem in the ToDecimal operator where the length of the +resulting string could be set incorrectly too long if the input +operand was a Buffer object. + +Fixed a problem in the Logical operators (LLess, etc.) where a +NULL byte (0) within a buffer would prematurely terminate a +compare between buffer objects. + +Added a check for string overflow (>200 characters as per the +ACPI specification) during the Concatenate operator with two +string operands. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total + Debug Version: 164.6K Code, 68.5K Data, 233.1K Total + Current Release: + Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total + Debug Version: 164.8K Code, 68.6K Data, 233.4K Total + + + +2) iASL Compiler/Disassembler: + +Allow the use of the ObjectType operator on uninitialized Locals +and Args (returns 0 as per the ACPI specification). + +Fixed a problem where the compiler would fault if there was a +syntax error in the FieldName of all of the various +CreateXXXField operators. + +Disallow the use of lower case letters within the EISAID macro, +as per the ACPI specification. All EISAID strings must be of the +form "UUUNNNN" Where U is an uppercase letter and N is a hex +digit. + + +---------------------------------------- +06 October 2004. Summary of changes for version 20041006: + +1) ACPI CA Core Subsystem: + +Implemented support for the ACPI 3.0 Timer operator. This ASL +function implements a 64-bit timer with 100 nanosecond +granularity. + +Defined a new OSL interface, AcpiOsGetTimer. This interface is +used to implement the ACPI 3.0 Timer operator. This allows the +host OS to implement the timer with the best clock available. +Also, it keeps the core subsystem out of the clock handling +business, since the host OS (usually) performs this function. + +Fixed an alignment issue on 64-bit platforms. The +HwLowLevelRead(Write) functions use a 64-bit address which is +part of the packed ACPI Generic Address Structure. Since the +structure is non-aligned, the alignment macros are now used to +extract the address to a local variable before use. + +Fixed a problem where the ToInteger operator assumed all input +strings were hexadecimal. The operator now handles both decimal +strings and hex strings (prefixed with "0x"). + +Fixed a problem where the string length in the string object +created as a result of the internal ConvertToString procedure +could be incorrect. This potentially affected all implicit +conversions and also the ToDecimalString and ToHexString +operators. + +Fixed two problems in the ToString operator. If the length +parameter was zero, an incorrect string object was created and +the value of the input length parameter was inadvertently changed +from zero to Ones. + +Fixed a problem where the optional ResourceSource string in the +ExtendedIRQ resource macro was ignored. + +Simplified the interfaces to the internal division functions, +reducing code size and complexity. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total + Debug Version: 164.5K Code, 68.3K Data, 232.8K Total + Current Release: + Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total + Debug Version: 164.6K Code, 68.5K Data, 233.1K Total + + +2) iASL Compiler/Disassembler: + +Implemented support for the ACPI 3.0 Timer operator. + +Fixed a problem where the Default() operator was inadvertently +ignored in a Switch/Case block. This was a problem in the +translation of the Switch statement to If...Else pairs. + +Added support to allow a standalone Return operator, with no +parentheses (or operands). + +Fixed a problem with code generation for the ElseIf operator +where the translated Else...If parse tree was improperly +constructed leading to the loss of some code. + +---------------------------------------- +22 September 2004. Summary of changes for version 20040922: + +1) ACPI CA Core Subsystem: + +Fixed a problem with the implementation of the LNot() operator +where "Ones" was not returned for the TRUE case. Changed the code +to return Ones instead of (!Arg) which was usually 1. This change +affects iASL constant folding for this operator also. + +Fixed a problem in AcpiUtInitializeBuffer where an existing +buffer was not initialized properly -- Now zero the entire buffer +in this case where the buffer already exists. + +Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32 +Milliseconds) to simply (ACPI_INTEGER Milliseconds). This +simplifies all related code considerably. This will require +changes/updates to all OS interface layers (OSLs.) + +Implemented a new external interface, +AcpiInstallExceptionHandler, to allow a system exception handler +to be installed. This handler is invoked upon any run-time +exception that occurs during control method execution. + +Added support for the DSDT in AcpiTbFindTable. This allows the +DataTableRegion() operator to access the local copy of the DSDT. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total + Debug Version: 164.2K Code, 68.2K Data, 232.4K Total + Current Release: + Non-Debug Version: 77.9K Code, 11.4K Data, 89.3K Total + Debug Version: 164.5K Code, 68.3K Data, 232.8K Total + + +2) iASL Compiler/Disassembler: + +Fixed a problem with constant folding and the LNot operator. LNot +was returning 1 in the TRUE case, not Ones as per the ACPI +specification. This could result in the generation of an +incorrect folded/reduced constant. + +End-Of-File is now allowed within a "//"-style comment. A parse +error no longer occurs if such a comment is at the very end of +the input ASL source file. + +Implemented the "-r" option to override the Revision in the table +header. The initial use of this option will be to simplify the +evaluation of the AML interpreter by allowing a single ASL source +module to be compiled for either 32-bit or 64-bit integers. + + +---------------------------------------- +27 August 2004. Summary of changes for version 20040827: + +1) ACPI CA Core Subsystem: + +- Implemented support for implicit object conversion in the non- +numeric logical operators (LEqual, LGreater, LGreaterEqual, +LLess, LLessEqual, and LNotEqual.) Any combination of +Integers/Strings/Buffers may now be used; the second operand is +implicitly converted on the fly to match the type of the first +operand. For example: + + LEqual (Source1, Source2) + +Source1 and Source2 must each evaluate to an integer, a string, +or a buffer. The data type of Source1 dictates the required type +of Source2. Source2 is implicitly converted if necessary to match +the type of Source1. + +- Updated and corrected the behavior of the string conversion +support. The rules concerning conversion of buffers to strings +(according to the ACPI specification) are as follows: + +ToDecimalString - explicit byte-wise conversion of buffer to +string of decimal values (0-255) separated by commas. ToHexString +- explicit byte-wise conversion of buffer to string of hex values +(0-FF) separated by commas. ToString - explicit byte-wise +conversion of buffer to string. Byte-by-byte copy with no +transform except NULL terminated. Any other implicit buffer-to- +string conversion - byte-wise conversion of buffer to string of +hex values (0-FF) separated by spaces. + +- Fixed typo in definition of AcpiGbl_EnableInterpreterSlack. + +- Fixed a problem in AcpiNsGetPathnameLength where the returned +length was one byte too short in the case of a node in the root +scope. This could cause a fault during debug output. + +- Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total + Debug Version: 164.1K Code, 68.3K Data, 232.4K Total + Current Release: + Non-Debug Version: 77.8K Code, 11.4K Data, 89.2K Total + Debug Version: 164.2K Code, 68.2K Data, 232.4K Total + + +2) iASL Compiler/Disassembler: + +- Fixed a Linux generation error. + + +---------------------------------------- +16 August 2004. Summary of changes for version 20040816: + +1) ACPI CA Core Subsystem: + +Designed and implemented support within the AML interpreter for +the so-called "implicit return". This support returns the result +of the last ASL operation within a control method, in the absence +of an explicit Return() operator. A few machines depend on this +behavior, even though it is not explicitly supported by the ASL +language. It is optional support that can be enabled at runtime +via the AcpiGbl_EnableInterpreterSlack flag. + +Removed support for the PCI_Config address space from the +internal low level hardware interfaces (AcpiHwLowLevelRead and +AcpiHwLowLevelWrite). This support was not used internally, and +would not work correctly anyway because the PCI bus number and +segment number were not supported. There are separate interfaces +for PCI configuration space access because of the unique +interface. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total + Debug Version: 164.1K Code, 68.2K Data, 232.3K Total + Current Release: + Non-Debug Version: 77.9K Code, 11.5K Data, 89.4K Total + Debug Version: 164.1K Code, 68.3K Data, 232.4K Total + + +2) iASL Compiler/Disassembler: + +Fixed a problem where constants in ASL expressions at the root +level (not within a control method) could be inadvertently +truncated during code generation. This problem was introduced in +the 20040715 release. + + +---------------------------------------- +15 July 2004. Summary of changes for version 20040715: + +1) ACPI CA Core Subsystem: + +Restructured the internal HW GPE interfaces to pass/track the +current state of interrupts (enabled/disabled) in order to avoid +possible deadlock and increase flexibility of the interfaces. + +Implemented a "lexicographical compare" for String and Buffer +objects within the logical operators -- LGreater, LLess, +LGreaterEqual, and LLessEqual -- as per further clarification to +the ACPI specification. Behavior is similar to C library +"strcmp". + +Completed a major reduction in CPU stack use for the +AcpiGetFirmwareTable external function. In the 32-bit non-debug +case, the stack use has been reduced from 168 bytes to 32 bytes. + +Deployed a new run-time configuration flag, +AcpiGbl_EnableInterpreterSlack, whose purpose is to allow the AML +interpreter to forgive certain bad AML constructs. Default +setting is FALSE. + +Implemented the first use of AcpiGbl_EnableInterpreterSlack in +the Field IO support code. If enabled, it allows field access to +go beyond the end of a region definition if the field is within +the region length rounded up to the next access width boundary (a +common coding error.) + +Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and +OSD_EXECUTION_CALLBACK to ACPI_OSD_EXEC_CALLBACK for consistency +with other ACPI symbols. Also, these symbols are lowercased by +the latest version of the AcpiSrc tool. + +The prototypes for the PCI interfaces in acpiosxf.h have been +updated to rename "Register" to simply "Reg" to prevent certain +compilers from complaining. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total + Debug Version: 163.8K Code, 68.2K Data, 232.0K Total + Current Release: + Non-Debug Version: 78.0K Code, 11.5K Data, 89.5K Total + Debug Version: 164.1K Code, 68.2K Data, 232.3K Total + + +2) iASL Compiler/Disassembler: + +Implemented full support for Package objects within the Case() +operator. Note: The Break() operator is currently not supported +within Case blocks (TermLists) as there is some question about +backward compatibility with ACPI 1.0 interpreters. + + +Fixed a problem where complex terms were not supported properly +within the Switch() operator. + +Eliminated extraneous warning for compiler-emitted reserved names +of the form "_T_x". (Used in Switch/Case operators.) + +Eliminated optimization messages for "_T_x" objects and small +constants within the DefinitionBlock operator. + + +---------------------------------------- +15 June 2004. Summary of changes for version 20040615: + +1) ACPI CA Core Subsystem: + +Implemented support for Buffer and String objects (as per ACPI +2.0) for the following ASL operators: LEqual, LGreater, LLess, +LGreaterEqual, and LLessEqual. + +All directory names in the entire source package are lower case, +as they were in earlier releases. + +Implemented "Disassemble" command in the AML debugger that will +disassemble a single control method. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total + Debug Version: 163.3K Code, 67.2K Data, 230.5K Total + + Current Release: + Non-Debug Version: 77.8K Code, 11.5K Data, 89.3K Total + Debug Version: 163.8K Code, 68.2K Data, 232.0K Total + + +2) iASL Compiler/Disassembler: + +Implemented support for Buffer and String objects (as per ACPI +2.0) for the following ASL operators: LEqual, LGreater, LLess, +LGreaterEqual, and LLessEqual. + +All directory names in the entire source package are lower case, +as they were in earlier releases. + +Fixed a fault when using the -g or -d<nofilename> options if the +FADT was not found. + +Fixed an issue with the Windows version of the compiler where +later versions of Windows place the FADT in the registry under +the name "FADT" and not "FACP" as earlier versions did. This +applies when using the -g or -d<nofilename> options. The +compiler now looks for both strings as necessary. + +Fixed a problem with compiler namepath optimization where a +namepath within the Scope() operator could not be optimized if +the namepath was a subpath of the current scope path. + +---------------------------------------- +27 May 2004. Summary of changes for version 20040527: + +1) ACPI CA Core Subsystem: + +Completed a new design and implementation for EBDA (Extended BIOS +Data Area) support in the RSDP scan code. The original code +improperly scanned for the EBDA by simply scanning from memory +location 0 to 0x400. The correct method is to first obtain the +EBDA pointer from within the BIOS data area, then scan 1K of +memory starting at the EBDA pointer. There appear to be few if +any machines that place the RSDP in the EBDA, however. + +Integrated a fix for a possible fault during evaluation of +BufferField arguments. Obsolete code that was causing the +problem was removed. + +Found and fixed a problem in the Field Support Code where data +could be corrupted on a bit field read that starts on an aligned +boundary but does not end on an aligned boundary. Merged the +read/write "datum length" calculation code into a common +procedure. + +Rolled in a couple of changes to the FreeBSD-specific header. + + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total + Debug Version: 163.2K Code, 67.2K Data, 230.4K Total + Current Release: + Non-Debug Version: 77.7K Code, 11.5K Data, 89.2K Total + Debug Version: 163.3K Code, 67.2K Data, 230.5K Total + + +2) iASL Compiler/Disassembler: + +Fixed a generation warning produced by some overly-verbose +compilers for a 64-bit constant. + +---------------------------------------- +14 May 2004. Summary of changes for version 20040514: + +1) ACPI CA Core Subsystem: + +Fixed a problem where hardware GPE enable bits sometimes not set +properly during and after GPE method execution. Result of 04/27 +changes. + +Removed extra "clear all GPEs" when sleeping/waking. + +Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the +single AcpiHwWriteGpeEnableReg. Changed a couple of calls to the +functions above to the new AcpiEv* calls as appropriate. + +ACPI_OS_NAME was removed from the OS-specific headers. The +default name is now "Microsoft Windows NT" for maximum +compatibility. However this can be changed by modifying the +acconfig.h file. + +Allow a single invocation of AcpiInstallNotifyHandler for a +handler that traps both types of notifies (System, Device). Use +ACPI_ALL_NOTIFY flag. + +Run _INI methods on ThermalZone objects. This is against the +ACPI specification, but there is apparently ASL code in the field +that has these _INI methods, and apparently "other" AML +interpreters execute them. + +Performed a full 16/32/64 bit lint that resulted in some small +changes. + +Added a sleep simulation command to the AML debugger to test +sleep code. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total + Debug Version: 162.9K Code, 67.0K Data, 229.9K Total + Current Release: + Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total + Debug Version: 163.2K Code, 67.2K Data, 230.4K Total + +---------------------------------------- +27 April 2004. Summary of changes for version 20040427: + +1) ACPI CA Core Subsystem: + +Completed a major overhaul of the GPE handling within ACPI CA. +There are now three types of GPEs: wake-only, runtime-only, and +combination wake/run. The only GPEs allowed to be combination +wake/run are for button-style devices such as a control-method +power button, control-method sleep button, or a notebook lid +switch. GPEs that have an _Lxx or _Exx method and are not +referenced by any _PRW methods are marked for "runtime" and +hardware enabled. Any GPE that is referenced by a _PRW method is +marked for "wake" (and disabled at runtime). However, at sleep +time, only those GPEs that have been specifically enabled for +wake via the AcpiEnableGpe interface will actually be hardware +enabled. + +A new external interface has been added, AcpiSetGpeType(), that +is meant to be used by device drivers to force a GPE to a +particular type. It will be especially useful for the drivers +for the button devices mentioned above. + +Completed restructuring of the ACPI CA initialization sequence so +that default operation region handlers are installed before GPEs +are initialized and the _PRW methods are executed. This will +prevent errors when the _PRW methods attempt to access system +memory or I/O space. + +GPE enable/disable no longer reads the GPE enable register. We +now keep the enable info for runtime and wake separate and in the +GPE_EVENT_INFO. We thus no longer depend on the hardware to +maintain these bits. + +Always clear the wake status and fixed/GPE status bits before +sleep, even for state S5. + +Improved the AML debugger output for displaying the GPE blocks +and their current status. + +Added new strings for the _OSI method, of the form "Windows 2001 +SPx" where x = 0,1,2,3,4. + +Fixed a problem where the physical address was incorrectly +calculated when the Load() operator was used to directly load +from an Operation Region (vs. loading from a Field object.) Also +added check for minimum table length for this case. + +Fix for multiple mutex acquisition. Restore original thread +SyncLevel on mutex release. + +Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for +consistency with the other fields returned. + +Shrunk the ACPI_GPE_EVENT_INFO structure by 40%. There is one +such structure for each GPE in the system, so the size of this +structure is important. + +CPU stack requirement reduction: Cleaned up the method execution +and object evaluation paths so that now a parameter structure is +passed, instead of copying the various method parameters over and +over again. + +In evregion.c: Correctly exit and reenter the interpreter region +if and only if dispatching an operation region request to a user- +installed handler. Do not exit/reenter when dispatching to a +default handler (e.g., default system memory or I/O handlers) + + +Notes for updating drivers for the new GPE support. The +following changes must be made to ACPI-related device drivers +that are attached to one or more GPEs: (This information will be +added to the ACPI CA Programmer Reference.) + +1) AcpiInstallGpeHandler no longer automatically enables the GPE, +you must explicitly call AcpiEnableGpe. +2) There is a new interface called AcpiSetGpeType. This should be +called before enabling the GPE. Also, this interface will +automatically disable the GPE if it is currently enabled. +3) AcpiEnableGpe no longer supports a GPE type flag. + +Specific drivers that must be changed: +1) EC driver: + AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED, +AeGpeHandler, NULL); + AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME); + AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR); + +2) Button Drivers (Power, Lid, Sleep): +Run _PRW method under parent device +If _PRW exists: /* This is a control-method button */ + Extract GPE number and possibly GpeDevice + AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN); + AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR); + +For all other devices that have _PRWs, we automatically set the +GPE type to ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically +(wake) enabled. This must be done on a selective basis, usually +requiring some kind of user app to allow the user to pick the +wake devices. + + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total + Debug Version: 161.0K Code, 66.3K Data, 227.3K Total + Current Release: + + Non-Debug Version: 77.6K Code, 11.5K Data, 89.1K Total + Debug Version: 162.9K Code, 67.0K Data, 229.9K Total + + + +---------------------------------------- +02 April 2004. Summary of changes for version 20040402: + +1) ACPI CA Core Subsystem: + +Fixed an interpreter problem where an indirect store through an +ArgX parameter was incorrectly applying the "implicit conversion +rules" during the store. From the ACPI specification: "If the +target is a method local or argument (LocalX or ArgX), no +conversion is performed and the result is stored directly to the +target". The new behavior is to disable implicit conversion +during ALL stores to an ArgX. + +Changed the behavior of the _PRW method scan to ignore any and +all errors returned by a given _PRW. This prevents the scan from +aborting from the failure of any single _PRW. + +Moved the runtime configuration parameters from the global init +procedure to static variables in acglobal.h. This will allow the +host to override the default values easily. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total + Debug Version: 160.8K Code, 66.1K Data, 226.9K Total + Current Release: + Non-Debug Version: 77.0K Code, 11.4K Data, 88.4K Total + Debug Version: 161.0K Code, 66.3K Data, 227.3K Total + + +2) iASL Compiler/Disassembler: + +iASL now fully disassembles SSDTs. However, External() +statements are not generated automatically for unresolved symbols +at this time. This is a planned feature for future +implementation. + +Fixed a scoping problem in the disassembler that occurs when the +type of the target of a Scope() operator is overridden. This +problem caused an incorrectly nested internal namespace to be +constructed. + +Any warnings or errors that are emitted during disassembly are +now commented out automatically so that the resulting file can be +recompiled without any hand editing. + +---------------------------------------- +26 March 2004. Summary of changes for version 20040326: + +1) ACPI CA Core Subsystem: + +Implemented support for "wake" GPEs via interaction between GPEs +and the _PRW methods. Every GPE that is pointed to by one or +more _PRWs is identified as a WAKE GPE and by default will no +longer be enabled at runtime. Previously, we were blindly +enabling all GPEs with a corresponding _Lxx or _Exx method - but +most of these turn out to be WAKE GPEs anyway. We believe this +has been the cause of thousands of "spurious" GPEs on some +systems. + +This new GPE behavior is can be reverted to the original behavior +(enable ALL GPEs at runtime) via a runtime flag. + +Fixed a problem where aliased control methods could not access +objects properly. The proper scope within the namespace was not +initialized (transferred to the target of the aliased method) +before executing the target method. + +Fixed a potential race condition on internal object deletion on +the return object in AcpiEvaluateObject. + +Integrated a fix for resource descriptors where both _MEM and +_MTP were being extracted instead of just _MEM. (i.e. bitmask +was incorrectly too wide, 0x0F instead of 0x03.) + +Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, +preventing a fault in some cases. + +Updated Notify() values for debug statements in evmisc.c + +Return proper status from AcpiUtMutexInitialize, not just simply +AE_OK. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + + Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total + Debug Version: 160.3K Code, 66.0K Data, 226.3K Total + Current Release: + Non-Debug Version: 76.9K Code, 11.4K Data, 88.3K Total + Debug Version: 160.8K Code, 66.1K Data, 226.9K Total + +---------------------------------------- +11 March 2004. Summary of changes for version 20040311: + +1) ACPI CA Core Subsystem: + +Fixed a problem where errors occurring during the parse phase of +control method execution did not abort cleanly. For example, +objects created and installed in the namespace were not deleted. +This caused all subsequent invocations of the method to return +the AE_ALREADY_EXISTS exception. + +Implemented a mechanism to force a control method to "Serialized" +execution if the method attempts to create namespace objects. +(The root of the AE_ALREADY_EXISTS problem.) + +Implemented support for the predefined _OSI "internal" control +method. Initial supported strings are "Linux", "Windows 2000", +"Windows 2001", and "Windows 2001.1", and can be easily upgraded +for new strings as necessary. This feature will allow "other" +operating systems to execute the fully tested, "Windows" code +path through the ASL code + +Global Lock Support: Now allows multiple acquires and releases +with any internal thread. Removed concept of "owning thread" for +this special mutex. + +Fixed two functions that were inappropriately declaring large +objects on the CPU stack: PsParseLoop, NsEvaluateRelative. +Reduces the stack usage during method execution considerably. + +Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where +the S4Bios_f field was incorrectly defined as UINT32 instead of +UINT32_BIT. + +Fixed a problem where AcpiEvGpeDetect would fault if there were +no GPEs defined on the machine. + +Implemented two runtime options: One to force all control method +execution to "Serialized" to mimic Windows behavior, another to +disable _OSI support if it causes problems on a given machine. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler and the compiler options used during generation. + + Previous Release: + Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total + Debug Version: 158.7K Code, 65.1K Data, 223.8K Total + Current Release: + Non-Debug Version: 76.5K Code, 11.3K Data, 87.8K Total + Debug Version: 160.3K Code, 66.0K Data, 226.3K Total + +2) iASL Compiler/Disassembler: + +Fixed an array size problem for FreeBSD that would cause the +compiler to fault. + +---------------------------------------- +20 February 2004. Summary of changes for version 20040220: + + +1) ACPI CA Core Subsystem: + +Implemented execution of _SxD methods for Device objects in the +GetObjectInfo interface. + +Fixed calls to _SST method to pass the correct arguments. + +Added a call to _SST on wake to restore to "working" state. + +Check for End-Of-Buffer failure case in the WalkResources +interface. + +Integrated fix for 64-bit alignment issue in acglobal.h by moving +two structures to the beginning of the file. + +After wake, clear GPE status register(s) before enabling GPEs. + +After wake, clear/enable power button. (Perhaps we should +clear/enable all fixed events upon wake.) + +Fixed a couple of possible memory leaks in the Namespace manager. + +Integrated latest acnetbsd.h file. + +---------------------------------------- +11 February 2004. Summary of changes for version 20040211: + + +1) ACPI CA Core Subsystem: + +Completed investigation and implementation of the call-by- +reference mechanism for control method arguments. + +Fixed a problem where a store of an object into an indexed +package could fail if the store occurs within a different method +than the method that created the package. + +Fixed a problem where the ToDecimal operator could return +incorrect results. + +Fixed a problem where the CopyObject operator could fail on some +of the more obscure objects (e.g., Reference objects.) + +Improved the output of the Debug object to display buffer, +package, and index objects. + +Fixed a problem where constructs of the form "RefOf (ArgX)" did +not return the expected result. + +Added permanent ACPI_REPORT_ERROR macros for all instances of the +ACPI_AML_INTERNAL exception. + +Integrated latest version of acfreebsd.h + +---------------------------------------- +16 January 2004. Summary of changes for version 20040116: + +The purpose of this release is primarily to update the copyright +years in each module, thus causing a huge number of diffs. There +are a few small functional changes, however. + +1) ACPI CA Core Subsystem: + +Improved error messages when there is a problem finding one or +more of the required base ACPI tables + +Reintroduced the definition of APIC_HEADER in actbl.h + +Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h) + +Removed extraneous reference to NewObj in dsmthdat.c + +2) iASL compiler + +Fixed a problem introduced in December that disabled the correct +disassembly of Resource Templates + + +---------------------------------------- +03 December 2003. Summary of changes for version 20031203: + +1) ACPI CA Core Subsystem: + +Changed the initialization of Operation Regions during subsystem +init to perform two entire walks of the ACPI namespace; The first +to initialize the regions themselves, the second to execute the +_REG methods. This fixed some interdependencies across _REG +methods found on some machines. + +Fixed a problem where a Store(Local0, Local1) could simply update +the object reference count, and not create a new copy of the +object if the Local1 is uninitialized. + +Implemented support for the _SST reserved method during sleep +transitions. + +Implemented support to clear the SLP_TYP and SLP_EN bits when +waking up, this is apparently required by some machines. + +When sleeping, clear the wake status only if SleepState is not +S5. + +Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect +pointer arithmetic advanced a string pointer too far. + +Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer +could be returned if the requested table has not been loaded. + +Within the support for IRQ resources, restructured the handling +of +the active and edge/level bits. + +Fixed a few problems in AcpiPsxExecute() where memory could be +leaked under certain error conditions. + +Improved error messages for the cases where the ACPI mode could +not be entered. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler +and the compiler options used during generation. + + Previous Release (20031029): + Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total + Debug Version: 158.3K Code, 65.0K Data, 223.3K Total + Current Release: + Non-Debug Version: 74.8K Code, 10.1K Data, 84.9K Total + Debug Version: 158.7K Code, 65.1K Data, 223.8K Total + +2) iASL Compiler/Disassembler: + +Implemented a fix for the iASL disassembler where a bad index was +generated. This was most noticeable on 64-bit platforms + + +---------------------------------------- +29 October 2003. Summary of changes for version 20031029: + +1) ACPI CA Core Subsystem: + + +Fixed a problem where a level-triggered GPE with an associated +_Lxx control method was incorrectly cleared twice. + +Fixed a problem with the Field support code where an access can +occur beyond the end-of-region if the field is non-aligned but +extends to the very end of the parent region (resulted in an +AE_AML_REGION_LIMIT exception.) + +Fixed a problem with ACPI Fixed Events where an RT Clock handler +would not get invoked on an RTC event. The RTC event bitmasks +for +the PM1 registers were not being initialized properly. + +Implemented support for executing _STA and _INI methods for +Processor objects. Although this is currently not part of the +ACPI specification, there is existing ASL code that depends on +the +init-time execution of these methods. + +Implemented and deployed a GetDescriptorName function to decode +the various types of internal descriptors. Guards against null +descriptors during debug output also. + +Implemented and deployed a GetNodeName function to extract the 4- +character namespace node name. This function simplifies the +debug +and error output, as well as guarding against null pointers +during +output. + +Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to +simplify the debug and error output of 64-bit integers. This +macro replaces the HIDWORD and LODWORD macros for dumping these +integers. + +Updated the implementation of the Stall() operator to only call +AcpiOsStall(), and also return an error if the operand is larger +than 255. This preserves the required behavior of not +relinquishing the processor, as would happen if AcpiOsSleep() was +called for "long stalls". + +Constructs of the form "Store(LocalX,LocalX)" where LocalX is not +initialized are now treated as NOOPs. + +Cleaned up a handful of warnings during 64-bit generation. + +Fixed a reported error where and incorrect GPE number was passed +to the GPE dispatch handler. This value is only used for error +output, however. Used this opportunity to clean up and +streamline +the GPE dispatch code. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The + +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler +and the compiler options used during generation. + + Previous Release (20031002): + Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total + Debug Version: 157.9K Code, 64.8K Data, 222.7K Total + Current Release: + Non-Debug Version: 74.4K Code, 10.1K Data, 84.5K Total + Debug Version: 158.3K Code, 65.0K Data, 223.3K Total + + +2) iASL Compiler/Disassembler: + +Updated the iASL compiler to return an error if the operand to +the +Stall() operator is larger than 255. + + +---------------------------------------- +02 October 2003. Summary of changes for version 20031002: + + +1) ACPI CA Core Subsystem: + +Fixed a problem with Index Fields where the index was not +incremented for fields that require multiple writes to the +index/data registers (Fields that are wider than the data +register.) + +Fixed a problem with all Field objects where a write could go +beyond the end-of-field if the field was larger than the access +granularity and therefore required multiple writes to complete +the +request. An extra write beyond the end of the field could happen +inadvertently. + +Fixed a problem with Index Fields where a BUFFER_OVERFLOW error +would incorrectly be returned if the width of the Data Register +was larger than the specified field access width. + +Completed fixes for LoadTable() and Unload() and verified their +operation. Implemented full support for the "DdbHandle" object +throughout the ACPI CA subsystem. + +Implemented full support for the MADT and ECDT tables in the ACPI +CA header files. Even though these tables are not directly +consumed by ACPI CA, the header definitions are useful for ACPI +device drivers. + +Integrated resource descriptor fixes posted to the Linux ACPI +list. This included checks for minimum descriptor length, and +support for trailing NULL strings within descriptors that have +optional string elements. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler +and the compiler options used during generation. + + Previous Release (20030918): + Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total + Debug Version: 157.3K Code, 64.5K Data, 221.8K Total + Current Release: + Non-Debug Version: 74.1K Code, 9.7K Data, 83.8K Total + Debug Version: 157.9K Code, 64.8K Data, 222.7K Total + + +2) iASL Compiler: + +Implemented detection of non-ASCII characters within the input +source ASL file. This catches attempts to compile binary (AML) +files early in the compile, with an informative error message. + +Fixed a problem where the disassembler would fault if the output +filename could not be generated or if the output file could not +be +opened. + +---------------------------------------- +18 September 2003. Summary of changes for version 20030918: + + +1) ACPI CA Core Subsystem: + +Found and fixed a longstanding problem with the late execution of +the various deferred AML opcodes (such as Operation Regions, +Buffer Fields, Buffers, and Packages). If the name string +specified for the name of the new object placed the object in a +scope other than the current scope, the initialization/execution +of the opcode failed. The solution to this problem was to +implement a mechanism where the late execution of such opcodes +does not attempt to lookup/create the name a second time in an +incorrect scope. This fixes the "region size computed +incorrectly" problem. + +Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing +a +Global Lock AE_BAD_PARAMETER error. + +Fixed several 64-bit issues with prototypes, casting and data +types. + +Removed duplicate prototype from acdisasm.h + +Fixed an issue involving EC Operation Region Detach (Shaohua Li) + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler +and the compiler options used during generation. + + Previous Release: + + Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total + Debug Version: 156.9K Code, 64.2K Data, 221.1K Total + Current Release: + Non-Debug Version: 73.9K Code, 9.7K Data, 83.6K Total + Debug Version: 157.3K Code, 64.5K Data, 221.8K Total + + +2) Linux: + +Fixed the AcpiOsSleep implementation in osunixxf.c to pass the +correct sleep time in seconds. + +---------------------------------------- +14 July 2003. Summary of changes for version 20030619: + +1) ACPI CA Core Subsystem: + +Parse SSDTs in order discovered, as opposed to reverse order +(Hrvoje Habjanic) + +Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas +Klausner, + Nate Lawson) + + +2) Linux: + +Dynamically allocate SDT list (suggested by Andi Kleen) + +proc function return value cleanups (Andi Kleen) + +Correctly handle NMI watchdog during long stalls (Andrew Morton) + +Make it so acpismp=force works (reported by Andrew Morton) + + +---------------------------------------- +19 June 2003. Summary of changes for version 20030619: + +1) ACPI CA Core Subsystem: + +Fix To/FromBCD, eliminating the need for an arch-specific +#define. + +Do not acquire a semaphore in the S5 shutdown path. + +Fix ex_digits_needed for 0. (Takayoshi Kochi) + +Fix sleep/stall code reversal. (Andi Kleen) + +Revert a change having to do with control method calling +semantics. + +2) Linux: + +acpiphp update (Takayoshi Kochi) + +Export acpi_disabled for sonypi (Stelian Pop) + +Mention acpismp=force in config help + +Re-add acpitable.c and acpismp=force. This improves backwards + +compatibility and also cleans up the code to a significant +degree. + +Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge) + +---------------------------------------- +22 May 2003. Summary of changes for version 20030522: + +1) ACPI CA Core Subsystem: + +Found and fixed a reported problem where an AE_NOT_FOUND error +occurred occasionally during _BST evaluation. This turned out to +be an Owner ID allocation issue where a called method did not get +a new ID assigned to it. Eventually, (after 64k calls), the +Owner +ID UINT16 would wraparound so that the ID would be the same as +the +caller's and the called method would delete the caller's +namespace. + +Implemented extended error reporting for control methods that are +aborted due to a run-time exception. Output includes the exact +AML instruction that caused the method abort, a dump of the +method +locals and arguments at the time of the abort, and a trace of all +nested control method calls. + +Modified the interpreter to allow the creation of buffers of zero +length from the AML code. Implemented new code to ensure that no +attempt is made to actually allocate a memory buffer (of length +zero) - instead, a simple buffer object with a NULL buffer +pointer +and length zero is created. A warning is no longer issued when +the AML attempts to create a zero-length buffer. + +Implemented a workaround for the "leading asterisk issue" in +_HIDs, _UIDs, and _CIDs in the AML interpreter. One leading +asterisk is automatically removed if present in any HID, UID, or +CID strings. The iASL compiler will still flag this asterisk as +an error, however. + +Implemented full support for _CID methods that return a package +of +multiple CIDs (Compatible IDs). The AcpiGetObjectInfo() +interface +now additionally returns a device _CID list if present. This +required a change to the external interface in order to pass an +ACPI_BUFFER object as a parameter since the _CID list is of +variable length. + +Fixed a problem with the new AE_SAME_HANDLER exception where +handler initialization code did not know about this exception. + +Code and Data Size: Current and previous core subsystem library +sizes are shown below. These are the code and data sizes for the +acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and +these values do not include any ACPI driver or OSPM code. The +debug version of the code includes the debug output trace +mechanism and has a much larger code and data size. Note that +these values will vary depending on the efficiency of the +compiler +and the compiler options used during generation. + + Previous Release (20030509): + Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total + Debug Version: 156.1K Code, 63.9K Data, 220.0K Total + Current Release: + Non-Debug Version: 73.7K Code, 9.7K Data, 83.4K Total + Debug Version: 156.9K Code, 64.2K Data, 221.1K Total + + +2) Linux: + +Fixed a bug in which we would reinitialize the ACPI interrupt +after it was already working, thus disabling all ACPI and the +IRQs +for any other device sharing the interrupt. (Thanks to Stian +Jordet) + +Toshiba driver update (John Belmonte) + +Return only 0 or 1 for our interrupt handler status (Andrew +Morton) + + +3) iASL Compiler: + +Fixed a reported problem where multiple (nested) ElseIf() +statements were not handled correctly by the compiler, resulting +in incorrect warnings and incorrect AML code. This was a problem +in both the ASL parser and the code generator. + + +4) Documentation: + +Added changes to existing interfaces, new exception codes, and +new +text concerning reference count object management versus garbage +collection. + +---------------------------------------- +09 May 2003. Summary of changes for version 20030509. + + +1) ACPI CA Core Subsystem: + +Changed the subsystem initialization sequence to hold off +installation of address space handlers until the hardware has +been +initialized and the system has entered ACPI mode. This is +because +the installation of space handlers can cause _REG methods to be +run. Previously, the _REG methods could potentially be run +before +ACPI mode was enabled. + +Fixed some memory leak issues related to address space handler +and +notify handler installation. There were some problems with the +reference count mechanism caused by the fact that the handler +objects are shared across several namespace objects. + +Fixed a reported problem where reference counts within the +namespace were not properly updated when named objects created by +method execution were deleted. + +Fixed a reported problem where multiple SSDTs caused a deletion +issue during subsystem termination. Restructured the table data +structures to simplify the linked lists and the related code. + +Fixed a problem where the table ID associated with secondary +tables (SSDTs) was not being propagated into the namespace +objects +created by those tables. This would only present a problem for +tables that are unloaded at run-time, however. + +Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE +type as the length parameter (instead of UINT32). + +Solved a long-standing problem where an ALREADY_EXISTS error +appears on various systems. This problem could happen when there +are multiple PCI_Config operation regions under a single PCI root +bus. This doesn't happen very frequently, but there are some +systems that do this in the ASL. + +Fixed a reported problem where the internal DeleteNode function +was incorrectly handling the case where a namespace node was the +first in the parent's child list, and had additional peers (not +the only child, but first in the list of children.) + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values +will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total + Debug Version: 156.1K Code, 63.6K Data, 219.7K Total + Current Release: + Non-Debug Version: 73.4K Code, 9.7K Data, 83.1K Total + Debug Version: 156.1K Code, 63.9K Data, 220.0K Total + + +2) Linux: + +Allow ":" in OS override string (Ducrot Bruno) + +Kobject fix (Greg KH) + + +3 iASL Compiler/Disassembler: + +Fixed a problem in the generation of the C source code files (AML +is emitted in C source statements for BIOS inclusion) where the +Ascii dump that appears within a C comment at the end of each +line +could cause a compile time error if the AML sequence happens to +have an open comment or close comment sequence embedded. + + +---------------------------------------- +24 April 2003. Summary of changes for version 20030424. + + +1) ACPI CA Core Subsystem: + +Support for big-endian systems has been implemented. Most of the +support has been invisibly added behind big-endian versions of +the +ACPI_MOVE_* macros. + +Fixed a problem in AcpiHwDisableGpeBlock() and +AcpiHwClearGpeBlock() where an incorrect offset was passed to the +low level hardware write routine. The offset parameter was +actually eliminated from the low level read/write routines +because +they had become obsolete. + +Fixed a problem where a handler object was deleted twice during +the removal of a fixed event handler. + + +2) Linux: + +A fix for SMP systems with link devices was contributed by + +Compaq's Dan Zink. + +(2.5) Return whether we handled the interrupt in our IRQ handler. +(Linux ISRs no longer return void, so we can propagate the +handler +return value from the ACPI CA core back to the OS.) + + + +3) Documentation: + +The ACPI CA Programmer Reference has been updated to reflect new +interfaces and changes to existing interfaces. + +---------------------------------------- +28 March 2003. Summary of changes for version 20030328. + +1) ACPI CA Core Subsystem: + +The GPE Block Device support has been completed. New interfaces +are AcpiInstallGpeBlock and AcpiRemoveGpeBlock. The Event +interfaces (enable, disable, clear, getstatus) have been split +into separate interfaces for Fixed Events and General Purpose +Events (GPEs) in order to support GPE Block Devices properly. + +Fixed a problem where the error message "Failed to acquire +semaphore" would appear during operations on the embedded +controller (EC). + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values +will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total + Debug Version: 154.0K Code, 63.4K Data, 217.4K Total + Current Release: + Non-Debug Version: 73.7K Code, 9.5K Data, 83.2K Total + Debug Version: 156.1K Code, 63.6K Data, 219.7K Total + + +---------------------------------------- +28 February 2003. Summary of changes for version 20030228. + + +1) ACPI CA Core Subsystem: + +The GPE handling and dispatch code has been completely overhauled +in preparation for support of GPE Block Devices (ID ACPI0006). +This affects internal data structures and code only; there should +be no differences visible externally. One new file has been +added, evgpeblk.c + +The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only +fields that are used to determine the GPE block lengths. The +REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address +structures are ignored. This is per the ACPI specification but +it +isn't very clear. The full 256 Block 0/1 GPEs are now supported +(the use of REGISTER_BIT_WIDTH limited the number of GPEs to +128). + +In the SCI interrupt handler, removed the read of the PM1_CONTROL +register to look at the SCI_EN bit. On some machines, this read +causes an SMI event and greatly slows down SCI events. (This may +in fact be the cause of slow battery status response on some +systems.) + +Fixed a problem where a store of a NULL string to a package +object +could cause the premature deletion of the object. This was seen +during execution of the battery _BIF method on some systems, +resulting in no battery data being returned. + +Added AcpiWalkResources interface to simplify parsing of resource +lists. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values +will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total + Debug Version: 153.0K Code, 62.9K Data, 215.9K Total + Current Release: + Non-Debug Version: 72.3K Code, 9.5K Data, 81.8K Total + Debug Version: 154.0K Code, 63.4K Data, 217.4K Total + + +2) Linux + +S3 fixes (Ole Rohne) + +Update ACPI PHP driver with to use new acpi_walk_resource API +(Bjorn Helgaas) + +Add S4BIOS support (Pavel Machek) + +Map in entire table before performing checksum (John Stultz) + +Expand the mem= cmdline to allow the specification of reserved +and +ACPI DATA blocks (Pavel Machek) + +Never use ACPI on VISWS + +Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez) + +Revert a change that allowed P_BLK lengths to be 4 or 5. This is +causing us to think that some systems support C2 when they really +don't. + +Do not count processor objects for non-present CPUs (Thanks to +Dominik Brodowski) + + +3) iASL Compiler: + +Fixed a problem where ASL include files could not be found and +opened. + +Added support for the _PDC reserved name. + + +---------------------------------------- +22 January 2003. Summary of changes for version 20030122. + + +1) ACPI CA Core Subsystem: + +Added a check for constructs of the form: Store (Local0, Local0) +where Local0 is not initialized. Apparently, some BIOS +programmers believe that this is a NOOP. Since this store +doesn't +do anything anyway, the new prototype behavior will ignore this +error. This is a case where we can relax the strict checking in +the interpreter in the name of compatibility. + + +2) Linux + +The AcpiSrc Source Conversion Utility has been released with the +Linux package for the first time. This is the utility that is +used to convert the ACPI CA base source code to the Linux +version. + +(Both) Handle P_BLK lengths shorter than 6 more gracefully + +(Both) Move more headers to include/acpi, and delete an unused +header. + +(Both) Move drivers/acpi/include directory to include/acpi + +(Both) Boot functions don't use cmdline, so don't pass it around + +(Both) Remove include of unused header (Adrian Bunk) + +(Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since +the +former now also includes the latter, acpiphp.h only needs the +one, +now. + +(2.5) Make it possible to select method of bios restoring after +S3 +resume. [=> no more ugly ifdefs] (Pavel Machek) + +(2.5) Make proc write interfaces work (Pavel Machek) + +(2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski) + +(2.5) Break out ACPI Perf code into its own module, under cpufreq +(Dominik Brodowski) + +(2.4) S4BIOS support (Ducrot Bruno) + +(2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio +Visinoni) + + +3) iASL Compiler: + +Added support to disassemble SSDT and PSDTs. + +Implemented support to obtain SSDTs from the Windows registry if +available. + + +---------------------------------------- +09 January 2003. Summary of changes for version 20030109. + +1) ACPI CA Core Subsystem: + +Changed the behavior of the internal Buffer-to-String conversion +function. The current ACPI specification states that the +contents +of the buffer are "converted to a string of two-character +hexadecimal numbers, each separated by a space". Unfortunately, +this definition is not backwards compatible with existing ACPI +1.0 +implementations (although the behavior was not defined in the +ACPI +1.0 specification). The new behavior simply copies data from the +buffer to the string until a null character is found or the end +of +the buffer is reached. The new String object is always null +terminated. This problem was seen during the generation of _BIF +battery data where incorrect strings were returned for battery +type, etc. This will also require an errata to the ACPI +specification. + +Renamed all instances of NATIVE_UINT and NATIVE_INT to +ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively. + +Copyright in all module headers (both Linux and non-Linux) has be +updated to 2003. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values +will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total + Debug Version: 153.0K Code, 62.9K Data, 215.9K Total + Current Release: + Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total + Debug Version: 153.0K Code, 62.9K Data, 215.9K Total + + +2) Linux + +Fixed an oops on module insertion/removal (Matthew Tippett) + +(2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante) + +(2.5) Replace pr_debug (Randy Dunlap) + +(2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski) + +(Both) Eliminate spawning of thread from timer callback, in favor +of schedule_work() + +(Both) Show Lid status in /proc (Zdenek OGAR Skalak) + +(Both) Added define for Fixed Function HW region (Matthew Wilcox) + +(Both) Add missing statics to button.c (Pavel Machek) + +Several changes have been made to the source code translation +utility that generates the Linux Code in order to make the code +more "Linux-like": + +All typedefs on structs and unions have been removed in keeping +with the Linux coding style. + +Removed the non-Linux SourceSafe module revision number from each +module header. + +Completed major overhaul of symbols to be lowercased for linux. +Doubled the number of symbols that are lowercased. + +Fixed a problem where identifiers within procedure headers and +within quotes were not fully lower cased (they were left with a +starting capital.) + +Some C macros whose only purpose is to allow the generation of 16- +bit code are now completely removed in the Linux code, increasing +readability and maintainability. + +---------------------------------------- + +12 December 2002. Summary of changes for version 20021212. + + +1) ACPI CA Core Subsystem: + +Fixed a problem where the creation of a zero-length AML Buffer +would cause a fault. + +Fixed a problem where a Buffer object that pointed to a static +AML +buffer (in an ACPI table) could inadvertently be deleted, causing +memory corruption. + +Fixed a problem where a user buffer (passed in to the external +ACPI CA interfaces) could be overwritten if the buffer was too +small to complete the operation, causing memory corruption. + +Fixed a problem in the Buffer-to-String conversion code where a +string of length one was always returned, regardless of the size +of the input Buffer object. + +Removed the NATIVE_CHAR data type across the entire source due to +lack of need and lack of consistent use. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values +will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total + Debug Version: 152.7K Code, 62.7K Data, 215.4K Total + Current Release: + Non-Debug Version: 72.0K Code, 9.5K Data, 81.5K Total + Debug Version: 153.0K Code, 62.9K Data, 215.9K Total + + +---------------------------------------- +05 December 2002. Summary of changes for version 20021205. + +1) ACPI CA Core Subsystem: + +Fixed a problem where a store to a String or Buffer object could +cause corruption of the DSDT if the object type being stored was +the same as the target object type and the length of the object +being stored was equal to or smaller than the original (existing) +target object. This was seen to cause corruption of battery _BIF +buffers if the _BIF method modified the buffer on the fly. + +Fixed a problem where an internal error was generated if a +control +method invocation was used in an OperationRegion, Buffer, or +Package declaration. This was caused by the deferred parsing of +the control method and thus the deferred creation of the internal +method object. The solution to this problem was to create the +internal method object at the moment the method is encountered in +the first pass - so that subsequent references to the method will +able to obtain the required parameter count and thus properly +parse the method invocation. This problem presented itself as an +AE_AML_INTERNAL during the pass 1 parse phase during table load. + +Fixed a problem where the internal String object copy routine did +not always allocate sufficient memory for the target String +object +and caused memory corruption. This problem was seen to cause +"Allocation already present in list!" errors as memory allocation +became corrupted. + +Implemented a new function for the evaluation of namespace +objects +that allows the specification of the allowable return object +types. This simplifies a lot of code that checks for a return +object of one or more specific objects returned from the +evaluation (such as _STA, etc.) This may become and external +function if it would be useful to ACPI-related drivers. + +Completed another round of prefixing #defines with "ACPI_" for +clarity. + +Completed additional code restructuring to allow more modular +linking for iASL compiler and AcpiExec. Several files were split +creating new files. New files: nsparse.c dsinit.c evgpe.c + +Implemented an abort mechanism to terminate an executing control +method via the AML debugger. This feature is useful for +debugging +control methods that depend (wait) for specific hardware +responses. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values +will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total + Debug Version: 152.9K Code, 63.3K Data, 216.2K Total + Current Release: + Non-Debug Version: 72.1K Code, 9.5K Data, 81.6K Total + Debug Version: 152.7K Code, 62.7K Data, 215.4K Total + + +2) iASL Compiler/Disassembler + +Fixed a compiler code generation problem for "Interrupt" Resource +Descriptors. If specified in the ASL, the optional "Resource +Source Index" and "Resource Source" fields were not inserted into +the correct location within the AML resource descriptor, creating +an invalid descriptor. + +Fixed a disassembler problem for "Interrupt" resource +descriptors. +The optional "Resource Source Index" and "Resource Source" fields +were ignored. + + +---------------------------------------- +22 November 2002. Summary of changes for version 20021122. + + +1) ACPI CA Core Subsystem: + +Fixed a reported problem where an object stored to a Method Local +or Arg was not copied to a new object during the store - the +object pointer was simply copied to the Local/Arg. This caused +all subsequent operations on the Local/Arg to also affect the +original source of the store operation. + +Fixed a problem where a store operation to a Method Local or Arg +was not completed properly if the Local/Arg contained a reference +(from RefOf) to a named field. The general-purpose store-to- +namespace-node code is now used so that this case is handled +automatically. + +Fixed a problem where the internal object copy routine would +cause +a protection fault if the object being copied was a Package and +contained either 1) a NULL package element or 2) a nested sub- +package. + +Fixed a problem with the GPE initialization that resulted from an +ambiguity in the ACPI specification. One section of the +specification states that both the address and length of the GPE +block must be zero if the block is not supported. Another +section +implies that only the address need be zero if the block is not +supported. The code has been changed so that both the address +and +the length must be non-zero to indicate a valid GPE block (i.e., +if either the address or the length is zero, the GPE block is +invalid.) + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values +will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total + Debug Version: 152.7K Code, 63.2K Data, 215.5K Total + Current Release: + Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total + Debug Version: 152.9K Code, 63.3K Data, 216.2K Total + + +2) Linux + +Cleaned up EC driver. Exported an external EC read/write +interface. By going through this, other drivers (most notably +sonypi) will be able to serialize access to the EC. + + +3) iASL Compiler/Disassembler + +Implemented support to optionally generate include files for both +ASM and C (the -i switch). This simplifies BIOS development by +automatically creating include files that contain external +declarations for the symbols that are created within the + +(optionally generated) ASM and C AML source files. + + +---------------------------------------- +15 November 2002. Summary of changes for version 20021115. + +1) ACPI CA Core Subsystem: + +Fixed a memory leak problem where an error during resolution of + +method arguments during a method invocation from another method +failed to cleanup properly by deleting all successfully resolved +argument objects. + +Fixed a problem where the target of the Index() operator was not +correctly constructed if the source object was a package. This +problem has not been detected because the use of a target operand +with Index() is very rare. + +Fixed a problem with the Index() operator where an attempt was +made to delete the operand objects twice. + +Fixed a problem where an attempt was made to delete an operand +twice during execution of the CondRefOf() operator if the target +did not exist. + +Implemented the first of perhaps several internal create object +functions that create and initialize a specific object type. +This +consolidates duplicated code wherever the object is created, thus +shrinking the size of the subsystem. + +Implemented improved debug/error messages for errors that occur +during nested method invocations. All executing method pathnames +are displayed (with the error) as the call stack is unwound - +thus +simplifying debug. + +Fixed a problem introduced in the 10/02 release that caused +premature deletion of a buffer object if a buffer was used as an +ASL operand where an integer operand is required (Thus causing an +implicit object conversion from Buffer to Integer.) The change +in +the 10/02 release was attempting to fix a memory leak (albeit +incorrectly.) + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values +will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total + Debug Version: 153.1K Code, 63.3K Data, 216.4K Total + Current Release: + Non-Debug Version: 71.3K Code, 9.0K Data, 80.3K Total + Debug Version: 152.7K Code, 63.2K Data, 215.5K Total + + +2) Linux + +Changed the implementation of the ACPI semaphores to use down() +instead of down_interruptable(). It is important that the +execution of ACPI control methods not be interrupted by signals. +Methods must run to completion, or the system may be left in an +unknown/unstable state. + +Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not +set. +(Shawn Starr) + + +3) iASL Compiler/Disassembler + + +Changed the default location of output files. All output files +are now placed in the current directory by default instead of in +the directory of the source file. This change may affect some +existing makefiles, but it brings the behavior of the compiler in +line with other similar tools. The location of the output files +can be overridden with the -p command line switch. + + +---------------------------------------- +11 November 2002. Summary of changes for version 20021111. + + +0) ACPI Specification 2.0B is released and is now available at: +http://www.acpi.info/index.html + + +1) ACPI CA Core Subsystem: + +Implemented support for the ACPI 2.0 SMBus Operation Regions. +This includes the early detection and handoff of the request to +the SMBus region handler (avoiding all of the complex field +support code), and support for the bidirectional return packet +from an SMBus write operation. This paves the way for the +development of SMBus drivers in each host operating system. + +Fixed a problem where the semaphore WAIT_FOREVER constant was +defined as 32 bits, but must be 16 bits according to the ACPI +specification. This had the side effect of causing ASL +Mutex/Event timeouts even though the ASL code requested a wait +forever. Changed all internal references to the ACPI timeout +parameter to 16 bits to prevent future problems. Changed the +name +of WAIT_FOREVER to ACPI_WAIT_FOREVER. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values +will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total + Debug Version: 152.3K Code, 63.0K Data, 215.3K Total + Current Release: + Non-Debug Version: 71.9K Code, 9.1K Data, 81.0K Total + Debug Version: 153.1K Code, 63.3K Data, 216.4K Total + + +2) Linux + +Module loading/unloading fixes (John Cagle) + + +3) iASL Compiler/Disassembler + +Added support for the SMBBlockProcessCall keyword (ACPI 2.0) + +Implemented support for the disassembly of all SMBus protocol +keywords (SMBQuick, SMBWord, etc.) + +---------------------------------------- +01 November 2002. Summary of changes for version 20021101. + + +1) ACPI CA Core Subsystem: + +Fixed a problem where platforms that have a GPE1 block but no +GPE0 +block were not handled correctly. This resulted in a "GPE +overlap" error message. GPE0 is no longer required. + +Removed code added in the previous release that inserted nodes +into the namespace in alphabetical order. This caused some side- +effects on various machines. The root cause of the problem is +still under investigation since in theory, the internal ordering +of the namespace nodes should not matter. + + +Enhanced error reporting for the case where a named object is not +found during control method execution. The full ACPI namepath +(name reference) of the object that was not found is displayed in +this case. + +Note: as a result of the overhaul of the namespace object types +in +the previous release, the namespace nodes for the predefined +scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE +instead of ACPI_TYPE_ANY. This simplifies the namespace +management code but may affect code that walks the namespace tree +looking for specific object types. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a much larger code and data size. Note that these values +will +vary depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total + Debug Version: 151.7K Code, 62.4K Data, 214.1K Total + Current Release: + Non-Debug Version: 71.4K Code, 9.0K Data, 80.4K Total + Debug Version: 152.3K Code, 63.0K Data, 215.3K Total + + +2) Linux + +Fixed a problem introduced in the previous release where the +Processor and Thermal objects were not recognized and installed +in +/proc. This was related to the scope type change described +above. + + +3) iASL Compiler/Disassembler + +Implemented the -g option to get all of the required ACPI tables +from the registry and save them to files (Windows version of the +compiler only.) The required tables are the FADT, FACS, and +DSDT. + +Added ACPI table checksum validation during table disassembly in +order to catch corrupted tables. + + +---------------------------------------- +22 October 2002. Summary of changes for version 20021022. + +1) ACPI CA Core Subsystem: + +Implemented a restriction on the Scope operator that the target +must already exist in the namespace at the time the operator is +encountered (during table load or method execution). In other +words, forward references are not allowed and Scope() cannot +create a new object. This changes the previous behavior where the +interpreter would create the name if not found. This new +behavior +correctly enables the search-to-root algorithm during namespace +lookup of the target name. Because of this upsearch, this fixes +the known Compaq _SB_.OKEC problem and makes both the AML +interpreter and iASL compiler compatible with other ACPI +implementations. + +Completed a major overhaul of the internal ACPI object types for +the ACPI Namespace and the associated operand objects. Many of +these types had become obsolete with the introduction of the two- +pass namespace load. This cleanup simplifies the code and makes +the entire namespace load mechanism much clearer and easier to +understand. + +Improved debug output for tracking scope opening/closing to help +diagnose scoping issues. The old scope name as well as the new +scope name are displayed. Also improved error messages for +problems with ASL Mutex objects and error messages for GPE +problems. + +Cleaned up the namespace dump code, removed obsolete code. + +All string output (for all namespace/object dumps) now uses the +common ACPI string output procedure which handles escapes +properly +and does not emit non-printable characters. + +Fixed some issues with constants in the 64-bit version of the +local C library (utclib.c) + + +2) Linux + +EC Driver: No longer attempts to acquire the Global Lock at +interrupt level. + + +3) iASL Compiler/Disassembler + +Implemented ACPI 2.0B grammar change that disallows all Type 1 +and +2 opcodes outside of a control method. This means that the +"executable" operators (versus the "namespace" operators) cannot +be used at the table level; they can only be used within a +control +method. + +Implemented the restriction on the Scope() operator where the +target must already exist in the namespace at the time the +operator is encountered (during ASL compilation). In other words, +forward references are not allowed and Scope() cannot create a +new +object. This makes the iASL compiler compatible with other ACPI +implementations and makes the Scope() implementation adhere to +the +ACPI specification. + +Fixed a problem where namepath optimization for the Alias +operator +was optimizing the wrong path (of the two namepaths.) This +caused +a "Missing alias link" error message. + +Fixed a problem where an "unknown reserved name" warning could be +incorrectly generated for names like "_SB" when the trailing +underscore is not used in the original ASL. + +Fixed a problem where the reserved name check did not handle +NamePaths with multiple NameSegs correctly. The first nameseg of +the NamePath was examined instead of the last NameSeg. + + +---------------------------------------- + +02 October 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem version 20021002: + +Fixed a problem where a store/copy of a string to an existing +string did not always set the string length properly in the +String +object. + +Fixed a reported problem with the ToString operator where the +behavior was identical to the ToHexString operator instead of +just +simply converting a raw buffer to a string data type. + +Fixed a problem where CopyObject and the other "explicit" +conversion operators were not updating the internal namespace +node +type as part of the store operation. + +Fixed a memory leak during implicit source operand conversion +where the original object was not deleted if it was converted to +a +new object of a different type. + +Enhanced error messages for all problems associated with +namespace +lookups. Common procedure generates and prints the lookup name +as +well as the formatted status. + +Completed implementation of a new design for the Alias support +within the namespace. The existing design did not handle the +case +where a new object was assigned to one of the two names due to +the +use of an explicit conversion operator, resulting in the two +names +pointing to two different objects. The new design simply points +the Alias name to the original name node - not to the object. +This results in a level of indirection that must be handled in +the +name resolution mechanism. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will +vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total + Debug Version: 150.0K Code, 61.7K Data, 211.7K Total + Current Release: + Non-Debug Version: 70.7K Code, 8.6K Data, 79.3K Total + Debug Version: 151.7K Code, 62.4K Data, 214.1K Total + + +2) Linux + +Initialize thermal driver's timer before it is used. (Knut +Neumann) + +Allow handling negative celsius values. (Kochi Takayoshi) + +Fix thermal management and make trip points. R/W (Pavel Machek) + +Fix /proc/acpi/sleep. (P. Christeas) + +IA64 fixes. (David Mosberger) + +Fix reversed logic in blacklist code. (Sergio Monteiro Basto) + +Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik +Brodowski) + + +3) iASL Compiler/Disassembler + +Clarified some warning/error messages. + + +---------------------------------------- +18 September 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem version 20020918: + +Fixed a reported problem with reference chaining (via the Index() +and RefOf() operators) in the ObjectType() and SizeOf() +operators. +The definition of these operators includes the dereferencing of +all chained references to return information on the base object. + +Fixed a problem with stores to indexed package elements - the +existing code would not complete the store if an "implicit +conversion" was not performed. In other words, if the existing +object (package element) was to be replaced completely, the code +didn't handle this case. + +Relaxed typechecking on the ASL "Scope" operator to allow the +target name to refer to an object of type Integer, String, or +Buffer, in addition to the scoping object types (Device, +predefined Scopes, Processor, PowerResource, and ThermalZone.) +This allows existing AML code that has workarounds for a bug in +Windows to function properly. A warning is issued, however. +This +affects both the AML interpreter and the iASL compiler. Below is +an example of this type of ASL code: + + Name(DEB,0x00) + Scope(DEB) + { + +Fixed some reported problems with 64-bit integer support in the +local implementation of C library functions (clib.c) + + +2) Linux + +Use ACPI fix map region instead of IOAPIC region, since it is +undefined in non-SMP. + +Ensure that the SCI has the proper polarity and trigger, even on +systems that do not have an interrupt override entry in the MADT. + +2.5 big driver reorganization (Pat Mochel) + +Use early table mapping code from acpitable.c (Andi Kleen) + +New blacklist entries (Andi Kleen) + +Blacklist improvements. Split blacklist code out into a separate +file. Move checking the blacklist to very early. Previously, we +would use ACPI tables, and then halfway through init, check the +blacklist -- too late. Now, it's early enough to completely fall- +back to non-ACPI. + + +3) iASL Compiler/Disassembler version 20020918: + +Fixed a problem where the typechecking code didn't know that an +alias could point to a method. In other words, aliases were not +being dereferenced during typechecking. + + +---------------------------------------- +29 August 2002. Summary of changes for this release. + +1) ACPI CA Core Subsystem Version 20020829: + +If the target of a Scope() operator already exists, it must be an +object type that actually opens a scope -- such as a Device, +Method, Scope, etc. This is a fatal runtime error. Similar +error +check has been added to the iASL compiler also. + +Tightened up the namespace load to disallow multiple names in the +same scope. This previously was allowed if both objects were of +the same type. (i.e., a lookup was the same as entering a new +name). + + +2) Linux + +Ensure that the ACPI interrupt has the proper trigger and +polarity. + +local_irq_disable is extraneous. (Matthew Wilcox) + +Make "acpi=off" actually do what it says, and not use the ACPI +interpreter *or* the tables. + +Added arch-neutral support for parsing SLIT and SRAT tables +(Kochi +Takayoshi) + + +3) iASL Compiler/Disassembler Version 20020829: + +Implemented namepath optimization for name declarations. For +example, a declaration like "Method (\_SB_.ABCD)" would get +optimized to "Method (ABCD)" if the declaration is within the +\_SB_ scope. This optimization is in addition to the named +reference path optimization first released in the previous +version. This would seem to complete all possible optimizations +for namepaths within the ASL/AML. + +If the target of a Scope() operator already exists, it must be an +object type that actually opens a scope -- such as a Device, +Method, Scope, etc. + +Implemented a check and warning for unreachable code in the same +block below a Return() statement. + +Fixed a problem where the listing file was not generated if the +compiler aborted if the maximum error count was exceeded (200). + +Fixed a problem where the typechecking of method return values +was +broken. This includes the check for a return value when the +method is invoked as a TermArg (a return value is expected.) + +Fixed a reported problem where EOF conditions during a quoted +string or comment caused a fault. + + +---------------------------------------- +15 August 2002. Summary of changes for this release. + +1) ACPI CA Core Subsystem Version 20020815: + +Fixed a reported problem where a Store to a method argument that +contains a reference did not perform the indirect store +correctly. +This problem was created during the conversion to the new +reference object model - the indirect store to a method argument +code was not updated to reflect the new model. + +Reworked the ACPI mode change code to better conform to ACPI 2.0, +handle corner cases, and improve code legibility (Kochi +Takayoshi) + +Fixed a problem with the pathname parsing for the carat (^) +prefix. The heavy use of the carat operator by the new namepath +optimization in the iASL compiler uncovered a problem with the +AML +interpreter handling of this prefix. In the case where one or +more carats precede a single nameseg, the nameseg was treated as +standalone and the search rule (to root) was inadvertently +applied. This could cause both the iASL compiler and the +interpreter to find the wrong object or to miss the error that +should occur if the object does not exist at that exact pathname. + +Found and fixed the problem where the HP Pavilion DSDT would not +load. This was a relatively minor tweak to the table loading +code +(a problem caused by the unexpected encounter with a method +invocation not within a control method), but it does not solve +the +overall issue of the execution of AML code at the table level. +This investigation is still ongoing. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will +vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total + Debug Version: 149.4K Code, 61.6K Data, 211.0K Total + Current Release: + Non-Debug Version: 69.6K Code, 8.3K Data, 77.9K Total + Debug Version: 150.0K Code, 61.7K Data, 211.7K Total + + +2) Linux + +Remove redundant slab.h include (Brad Hards) + +Fix several bugs in thermal.c (Herbert Nachtnebel) + +Make CONFIG_ACPI_BOOT work properly (Pavel Machek) + +Change acpi_system_suspend to use updated irq functions (Pavel +Machek) + +Export acpi_get_firmware_table (Matthew Wilcox) + +Use proper root proc entry for ACPI (Kochi Takayoshi) + +Fix early-boot table parsing (Bjorn Helgaas) + + +3) iASL Compiler/Disassembler + +Reworked the compiler options to make them more consistent and to +use two-letter options where appropriate. We were running out of +sensible letters. This may break some makefiles, so check the +current options list by invoking the compiler with no parameters. + +Completed the design and implementation of the ASL namepath +optimization option for the compiler. This option optimizes all +references to named objects to the shortest possible path. The +first attempt tries to utilize a single nameseg (4 characters) +and +the "search-to-root" algorithm used by the interpreter. If that +cannot be used (because either the name is not in the search path +or there is a conflict with another object with the same name), +the pathname is optimized using the carat prefix (usually a +shorter string than specifying the entire path from the root.) + +Implemented support to obtain the DSDT from the Windows registry +(when the disassembly option is specified with no input file). +Added this code as the implementation for AcpiOsTableOverride in +the Windows OSL. Migrated the 16-bit code (used in the AcpiDump +utility) to scan memory for the DSDT to the AcpiOsTableOverride +function in the DOS OSL to make the disassembler truly OS +independent. + +Implemented a new option to disassemble and compile in one step. +When used without an input filename, this option will grab the +DSDT from the local machine, disassemble it, and compile it in +one +step. + +Added a warning message for invalid escapes (a backslash followed +by any character other than the allowable escapes). This catches +the quoted string error "\_SB_" (which should be "\\_SB_" ). + +Also, there are numerous instances in the ACPI specification +where +this error occurs. + +Added a compiler option to disable all optimizations. This is +basically the "compatibility mode" because by using this option, +the AML code will come out exactly the same as other ASL +compilers. + +Added error messages for incorrectly ordered dependent resource +functions. This includes: missing EndDependentFn macro at end of +dependent resource list, nested dependent function macros (both +start and end), and missing StartDependentFn macro. These are +common errors that should be caught at compile time. + +Implemented _OSI support for the disassembler and compiler. _OSI +must be included in the namespace for proper disassembly (because +the disassembler must know the number of arguments.) + +Added an "optimization" message type that is optional (off by +default). This message is used for all optimizations - including +constant folding, integer optimization, and namepath +optimization. + +---------------------------------------- +25 July 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem Version 20020725: + +The AML Disassembler has been enhanced to produce compilable ASL +code and has been integrated into the iASL compiler (see below) +as +well as the single-step disassembly for the AML debugger and the +disassembler for the AcpiDump utility. All ACPI 2.0A opcodes, +resource templates and macros are fully supported. The +disassembler has been tested on over 30 different AML files, +producing identical AML when the resulting disassembled ASL file +is recompiled with the same ASL compiler. + +Modified the Resource Manager to allow zero interrupts and zero +dma channels during the GetCurrentResources call. This was +causing problems on some platforms. + +Added the AcpiOsRedirectOutput interface to the OSL to simplify +output redirection for the AcpiOsPrintf and AcpiOsVprintf +interfaces. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will +vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total + Debug Version: 142.9K Code, 58.7K Data, 201.6K Total + Current Release: + Non-Debug Version: 69.1K Code, 8.2K Data, 77.3K Total + Debug Version: 149.4K Code, 61.6K Data, 211.0K Total + + +2) Linux + +Fixed a panic in the EC driver (Dominik Brodowski) + +Implemented checksum of the R/XSDT itself during Linux table scan +(Richard Schaal) + + +3) iASL compiler + +The AML disassembler is integrated into the compiler. The "-d" +option invokes the disassembler to completely disassemble an +input AML file, producing as output a text ASL file with the +extension ".dsl" (to avoid name collisions with existing .asl +source files.) A future enhancement will allow the disassembler +to obtain the BIOS DSDT from the registry under Windows. + +Fixed a problem with the VendorShort and VendorLong resource +descriptors where an invalid AML sequence was created. + +Implemented a fix for BufferData term in the ASL parser. It was +inadvertently defined twice, allowing invalid syntax to pass and +causing reduction conflicts. + +Fixed a problem where the Ones opcode could get converted to a +value of zero if "Ones" was used where a byte, word or dword +value +was expected. The 64-bit value is now truncated to the correct +size with the correct value. + + + +---------------------------------------- +02 July 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem Version 20020702: + +The Table Manager code has been restructured to add several new +features. Tables that are not required by the core subsystem +(other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer +validated in any way and are returned from AcpiGetFirmwareTable +if +requested. The AcpiOsTableOverride interface is now called for +each table that is loaded by the subsystem in order to allow the +host to override any table it chooses. Previously, only the DSDT +could be overridden. Added one new files, tbrsdt.c and +tbgetall.c. + +Fixed a problem with the conversion of internal package objects +to +external objects (when a package is returned from a control +method.) The return buffer length was set to zero instead of the +proper length of the package object. + +Fixed a reported problem with the use of the RefOf and DeRefOf +operators when passing reference arguments to control methods. A +new type of Reference object is used internally for references +produced by the RefOf operator. + +Added additional error messages in the Resource Manager to +explain +AE_BAD_DATA errors when they occur during resource parsing. + +Split the AcpiEnableSubsystem into two primitives to enable a +finer granularity initialization sequence. These two calls +should +be called in this order: AcpiEnableSubsystem (flags), +AcpiInitializeObjects (flags). The flags parameter remains the +same. + + +2) Linux + +Updated the ACPI utilities module to understand the new style of +fully resolved package objects that are now returned from the +core +subsystem. This eliminates errors of the form: + + ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT] + acpi_utils-0430 [145] acpi_evaluate_reference: + Invalid element in package (not a device reference) + +The method evaluation utility uses the new buffer allocation +scheme instead of calling AcpiEvaluate Object twice. + +Added support for ECDT. This allows the use of the Embedded + +Controller before the namespace has been fully initialized, which +is necessary for ACPI 2.0 support, and for some laptops to +initialize properly. (Laptops using ECDT are still rare, so only +limited testing was performed of the added functionality.) + +Fixed memory leaks in the EC driver. + +Eliminated a brittle code structure in acpi_bus_init(). + +Eliminated the acpi_evaluate() helper function in utils.c. It is +no longer needed since acpi_evaluate_object can optionally +allocate memory for the return object. + +Implemented fix for keyboard hang when getting battery readings +on +some systems (Stephen White) + +PCI IRQ routing update (Dominik Brodowski) + +Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC +support + +---------------------------------------- +11 June 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem Version 20020611: + +Fixed a reported problem where constants such as Zero and One +appearing within _PRT packages were not handled correctly within +the resource manager code. Originally reported against the ASL +compiler because the code generator now optimizes integers to +their minimal AML representation (i.e. AML constants if +possible.) +The _PRT code now handles all AML constant opcodes correctly +(Zero, One, Ones, Revision). + +Fixed a problem with the Concatenate operator in the AML +interpreter where a buffer result object was incorrectly marked +as +not fully evaluated, causing a run-time error of AE_AML_INTERNAL. + +All package sub-objects are now fully resolved before they are +returned from the external ACPI interfaces. This means that name +strings are resolved to object handles, and constant operators +(Zero, One, Ones, Revision) are resolved to Integers. + +Implemented immediate resolution of the AML Constant opcodes +(Zero, One, Ones, Revision) to Integer objects upon detection +within the AML stream. This has simplified and reduced the +generated code size of the subsystem by eliminating about 10 +switch statements for these constants (which previously were +contained in Reference objects.) The complicating issues are +that +the Zero opcode is used as a "placeholder" for unspecified +optional target operands and stores to constants are defined to +be +no-ops. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will +vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total + Debug Version: 143.8K Code, 58.8K Data, 202.6K Total + Current Release: + Non-Debug Version: 68.7K Code, 7.4K Data, 76.1K Total + Debug Version: 142.9K Code, 58.7K Data, 201.6K Total + + +2) Linux + + +Added preliminary support for obtaining _TRA data for PCI root +bridges (Bjorn Helgaas). + + +3) iASL Compiler Version X2046: + +Fixed a problem where the "_DDN" reserved name was defined to be +a +control method with one argument. There are no arguments, and +_DDN does not have to be a control method. + +Fixed a problem with the Linux version of the compiler where the +source lines printed with error messages were the wrong lines. +This turned out to be the "LF versus CR/LF" difference between +Windows and Unix. This appears to be the longstanding issue +concerning listing output and error messages. + +Fixed a problem with the Linux version of compiler where opcode +names within error messages were wrong. This was caused by a +slight difference in the output of the Flex tool on Linux versus +Windows. + +Fixed a problem with the Linux compiler where the hex output +files +contained some garbage data caused by an internal buffer overrun. + + +---------------------------------------- +17 May 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem Version 20020517: + +Implemented a workaround to an BIOS bug discovered on the HP +OmniBook where the FADT revision number and the table size are +inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size). The +new +behavior is to fallback to using only the ACPI 1.0 fields of the +FADT if the table is too small to be a ACPI 2.0 table as claimed +by the revision number. Although this is a BIOS bug, this is a +case where the workaround is simple enough and with no side +effects, so it seemed prudent to add it. A warning message is +issued, however. + +Implemented minimum size checks for the fixed-length ACPI tables +- +- the FADT and FACS, as well as consistency checks between the +revision number and the table size. + +Fixed a reported problem in the table override support where the +new table pointer was incorrectly treated as a physical address +instead of a logical address. + +Eliminated the use of the AE_AML_ERROR exception and replaced it +with more descriptive codes. + +Fixed a problem where an exception would occur if an ASL Field +was +defined with no named Field Units underneath it (used by some +index fields). + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will +vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total + Debug Version: 142.9K Code, 58.4K Data, 201.3K Total + Current Release: + Non-Debug Version: 69.3K Code, 7.4K Data, 76.7K Total + Debug Version: 143.8K Code, 58.8K Data, 202.6K Total + + + +2) Linux + +Much work done on ACPI init (MADT and PCI IRQ routing support). +(Paul D. and Dominik Brodowski) + +Fix PCI IRQ-related panic on boot (Sam Revitch) + +Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno) + +Fix "MHz" typo (Dominik Brodowski) + +Fix RTC year 2000 issue (Dominik Brodowski) + +Preclude multiple button proc entries (Eric Brunet) + +Moved arch-specific code out of include/platform/aclinux.h + +3) iASL Compiler Version X2044: + +Implemented error checking for the string used in the EISAID +macro +(Usually used in the definition of the _HID object.) The code +now +strictly enforces the PnP format - exactly 7 characters, 3 +uppercase letters and 4 hex digits. + +If a raw string is used in the definition of the _HID object +(instead of the EISAID macro), the string must contain all +alphanumeric characters (e.g., "*PNP0011" is not allowed because +of the asterisk.) + +Implemented checking for invalid use of ACPI reserved names for +most of the name creation operators (Name, Device, Event, Mutex, +OperationRegion, PowerResource, Processor, and ThermalZone.) +Previously, this check was only performed for control methods. + +Implemented an additional check on the Name operator to emit an +error if a reserved name that must be implemented in ASL as a +control method is used. We know that a reserved name must be a +method if it is defined with input arguments. + +The warning emitted when a namespace object reference is not +found +during the cross reference phase has been changed into an error. +The "External" directive should be used for names defined in +other +modules. + + +4) Tools and Utilities + +The 16-bit tools (adump16 and aexec16) have been regenerated and +tested. + +Fixed a problem with the output of both acpidump and adump16 +where +the indentation of closing parentheses and brackets was not + +aligned properly with the parent block. + + +---------------------------------------- +03 May 2002. Summary of changes for this release. + + +1) ACPI CA Core Subsystem Version 20020503: + +Added support a new OSL interface that allows the host operating + +system software to override the DSDT found in the firmware - +AcpiOsTableOverride. With this interface, the OSL can examine +the +version of the firmware DSDT and replace it with a different one +if desired. + +Added new external interfaces for accessing ACPI registers from +device drivers and other system software - AcpiGetRegister and +AcpiSetRegister. This was simply an externalization of the +existing AcpiHwBitRegister interfaces. + +Fixed a regression introduced in the previous build where the +ASL/AML CreateField operator always returned an error, +"destination must be a NS Node". + +Extended the maximum time (before failure) to successfully enable +ACPI mode to 3 seconds. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will +vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total + Debug Version: 142.4K Code, 58.3K Data, 200.7K Total + Current Release: + Non-Debug Version: 68.8K Code, 7.1K Data, 75.9K Total + Debug Version: 142.9K Code, 58.4K Data, 201.3K Total + + +2) Linux + +Enhanced ACPI init code for SMP. We are now fully MPS and $PIR- +free. While 3 out of 4 of our in-house systems work fine, the +last +one still hangs when testing the LAPIC timer. + +Renamed many files in 2.5 kernel release to omit "acpi_" from the +name. + +Added warning on boot for Presario 711FR. + +Sleep improvements (Pavel Machek) + +ACPI can now be built without CONFIG_PCI enabled. + +IA64: Fixed memory map functions (JI Lee) + + +3) iASL Compiler Version X2043: + +Added support to allow the compiler to be integrated into the MS +VC++ development environment for one-button compilation of single +files or entire projects -- with error-to-source-line mapping. + +Implemented support for compile-time constant folding for the +Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0 +specification. This allows the ASL writer to use expressions +instead of Integer/Buffer/String constants in terms that must +evaluate to constants at compile time and will also simplify the +emitted AML in any such sub-expressions that can be folded +(evaluated at compile-time.) This increases the size of the +compiler significantly because a portion of the ACPI CA AML +interpreter is included within the compiler in order to pre- +evaluate constant expressions. + + +Fixed a problem with the "Unicode" ASL macro that caused the +compiler to fault. (This macro is used in conjunction with the +_STR reserved name.) + +Implemented an AML opcode optimization to use the Zero, One, and +Ones opcodes where possible to further reduce the size of integer +constants and thus reduce the overall size of the generated AML +code. + +Implemented error checking for new reserved terms for ACPI +version +2.0A. + +Implemented the -qr option to display the current list of ACPI +reserved names known to the compiler. + +Implemented the -qc option to display the current list of ASL +operators that are allowed within constant expressions and can +therefore be folded at compile time if the operands are +constants. + + +4) Documentation + +Updated the Programmer's Reference for new interfaces, data +types, +and memory allocation model options. + +Updated the iASL Compiler User Reference to apply new format and +add information about new features and options. + +---------------------------------------- +19 April 2002. Summary of changes for this release. + +1) ACPI CA Core Subsystem Version 20020419: + +The source code base for the Core Subsystem has been completely +cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit +versions. The Lint option files used are included in the +/acpi/generate/lint directory. + +Implemented enhanced status/error checking across the entire +Hardware manager subsystem. Any hardware errors (reported from +the OSL) are now bubbled up and will abort a running control +method. + + +Fixed a problem where the per-ACPI-table integer width (32 or 64) +was stored only with control method nodes, causing a fault when +non-control method code was executed during table loading. The +solution implemented uses a global variable to indicate table +width across the entire ACPI subsystem. Therefore, ACPI CA does +not support mixed integer widths across different ACPI tables +(DSDT, SSDT). + +Fixed a problem where NULL extended fields (X fields) in an ACPI +2.0 ACPI FADT caused the table load to fail. Although the +existing ACPI specification is a bit fuzzy on this topic, the new +behavior is to fall back on a ACPI 1.0 field if the corresponding +ACPI 2.0 X field is zero (even though the table revision +indicates +a full ACPI 2.0 table.) The ACPI specification will be updated +to +clarify this issue. + +Fixed a problem with the SystemMemory operation region handler +where memory was always accessed byte-wise even if the AML- +specified access width was larger than a byte. This caused +problems on systems with memory-mapped I/O. Memory is now +accessed with the width specified. On systems that do not +support +non-aligned transfers, a check is made to guarantee proper +address +alignment before proceeding in order to avoid an AML-caused +alignment fault within the kernel. + + +Fixed a problem with the ExtendedIrq resource where only one byte +of the 4-byte Irq field was extracted. + +Fixed the AcpiExDigitsNeeded() procedure to support _UID. This +function was out of date and required a rewrite. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will +vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total + Debug Version: 139.8K Code, 57.4K Data, 197.2K Total + Current Release: + Non-Debug Version: 68.5K Code, 7.0K Data, 75.5K Total + Debug Version: 142.4K Code, 58.3K Data, 200.7K Total + + +2) Linux + +PCI IRQ routing fixes (Dominik Brodowski) + + +3) iASL Compiler Version X2042: + +Implemented an additional compile-time error check for a field +unit whose size + minimum access width would cause a run-time +access beyond the end-of-region. Previously, only the field size +itself was checked. + +The Core subsystem and iASL compiler now share a common parse +object in preparation for compile-time evaluation of the type +3/4/5 ASL operators. + + +---------------------------------------- +Summary of changes for this release: 03_29_02 + +1) ACPI CA Core Subsystem Version 20020329: + +Implemented support for late evaluation of TermArg operands to +Buffer and Package objects. This allows complex expressions to +be +used in the declarations of these object types. + +Fixed an ACPI 1.0 compatibility issue when reading Fields. In +ACPI +1.0, if the field was larger than 32 bits, it was returned as a +buffer - otherwise it was returned as an integer. In ACPI 2.0, +the field is returned as a buffer only if the field is larger +than +64 bits. The TableRevision is now considered when making this +conversion to avoid incompatibility with existing ASL code. + +Implemented logical addressing for AcpiOsGetRootPointer. This +allows an RSDP with either a logical or physical address. With +this support, the host OS can now override all ACPI tables with +one logical RSDP. Includes implementation of "typed" pointer +support to allow a common data type for both physical and logical +pointers internally. This required a change to the +AcpiOsGetRootPointer interface. + +Implemented the use of ACPI 2.0 Generic Address Structures for +all +GPE, Fixed Event, and PM Timer I/O. This allows the use of +memory +mapped I/O for these ACPI features. + +Initialization now ignores not only non-required tables (All +tables other than the FADT, FACS, DSDT, and SSDTs), but also does +not validate the table headers of unrecognized tables. + +Fixed a problem where a notify handler could only be +installed/removed on an object of type Device. All "notify" + +objects are now supported -- Devices, Processor, Power, and +Thermal. + +Removed most verbosity from the ACPI_DB_INFO debug level. Only +critical information is returned when this debug level is +enabled. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will +vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release + Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total + Debug Version: 138.0K Code, 56.6K Data, 194.6K Total + Current Release: + Non-Debug Version: 66.6K Code, 6.5K Data, 73.1K Total + Debug Version: 139.8K Code, 57.4K Data, 197.2K Total + + +2) Linux: + +The processor driver (acpi_processor.c) now fully supports ACPI +2.0-based processor performance control (e.g. Intel(R) +SpeedStep(TM) technology) Note that older laptops that only have +the Intel "applet" interface are not supported through this. The +'limit' and 'performance' interface (/proc) are fully functional. +[Note that basic policy for controlling performance state +transitions will be included in the next version of ospmd.] The +idle handler was modified to more aggressively use C2, and PIIX4 +errata handling underwent a complete overhaul (big thanks to +Dominik Brodowski). + +Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR- +based devices in the ACPI namespace are now dynamically bound +(associated) with their PCI counterparts (e.g. PCI1->01:00.0). +This allows, among other things, ACPI to resolve bus numbers for +subordinate PCI bridges. + +Enhanced PCI IRQ routing to get the proper bus number for _PRT +entries defined underneath PCI bridges. + +Added IBM 600E to bad bios list due to invalid _ADR value for +PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing. + +In the process of adding full MADT support (e.g. IOAPIC) for IA32 +(acpi.c, mpparse.c) -- stay tuned. + +Added back visual differentiation between fixed-feature and +control-method buttons in dmesg. Buttons are also subtyped (e.g. +button/power/PWRF) to simplify button identification. + +We no longer use -Wno-unused when compiling debug. Please ignore +any "_THIS_MODULE defined but not used" messages. + +Can now shut down the system using "magic sysrq" key. + + +3) iASL Compiler version 2041: + +Fixed a problem where conversion errors for hex/octal/decimal +constants were not reported. + +Implemented a fix for the General Register template Address +field. +This field was 8 bits when it should be 64. + +Fixed a problem where errors/warnings were no longer being +emitted +within the listing output file. + +Implemented the ACPI 2.0A restriction on ACPI Table Signatures to +exactly 4 characters, alphanumeric only. + + + + +---------------------------------------- +Summary of changes for this release: 03_08_02 + + +1) ACPI CA Core Subsystem Version 20020308: + +Fixed a problem with AML Fields where the use of the "AccessAny" +keyword could cause an interpreter error due to attempting to +read +or write beyond the end of the parent Operation Region. + +Fixed a problem in the SystemMemory Operation Region handler +where +an attempt was made to map memory beyond the end of the region. +This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY" +errors on some Linux systems. + +Fixed a problem where the interpreter/namespace "search to root" +algorithm was not functioning for some object types. Relaxed the +internal restriction on the search to allow upsearches for all +external object types as well as most internal types. + + +2) Linux: + +We now use safe_halt() macro versus individual calls to sti | +hlt. + +Writing to the processor limit interface should now work. "echo +1" +will increase the limit, 2 will decrease, and 0 will reset to the + +default. + + +3) ASL compiler: + +Fixed segfault on Linux version. + + +---------------------------------------- +Summary of changes for this release: 02_25_02 + +1) ACPI CA Core Subsystem: + + +Fixed a problem where the GPE bit masks were not initialized +properly, causing erratic GPE behavior. + +Implemented limited support for multiple calling conventions. +The +code can be generated with either the VPL (variable parameter +list, or "C") convention, or the FPL (fixed parameter list, or +"Pascal") convention. The core subsystem is about 3.4% smaller +when generated with FPL. + + +2) Linux + +Re-add some /proc/acpi/event functionality that was lost during +the rewrite + +Resolved issue with /proc events for fixed-feature buttons +showing +up as the system device. + +Fixed checks on C2/C3 latencies to be inclusive of maximum +values. + +Replaced AE_ERRORs in acpi_osl.c with more specific error codes. + +Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi" + +Fixed limit interface & usage to fix bugs with passive cooling +hysterisis. + +Restructured PRT support. + + +---------------------------------------- +Summary of changes for this label: 02_14_02 + + +1) ACPI CA Core Subsystem: + +Implemented support in AcpiLoadTable to allow loading of FACS and +FADT tables. + +Suport for the now-obsolete interim 0.71 64-bit ACPI tables has +been removed. All 64-bit platforms should be migrated to the +ACPI +2.0 tables. The actbl71.h header has been removed from the +source +tree. + +All C macros defined within the subsystem have been prefixed with +"ACPI_" to avoid collision with other system include files. + +Removed the return value for the two AcpiOsPrint interfaces, +since +it is never used and causes lint warnings for ignoring the return +value. + +Added error checking to all internal mutex acquire and release +calls. Although a failure from one of these interfaces is +probably a fatal system error, these checks will cause the +immediate abort of the currently executing method or interface. + +Fixed a problem where the AcpiSetCurrentResources interface could +fault. This was a side effect of the deployment of the new +memory +allocation model. + +Fixed a couple of problems with the Global Lock support +introduced +in the last major build. The "common" (1.0/2.0) internal FACS +was +being overwritten with the FACS signature and clobbering the +Global Lock pointer. Also, the actual firmware FACS was being +unmapped after construction of the "common" FACS, preventing +access to the actual Global Lock field within it. The "common" +internal FACS is no longer installed as an actual ACPI table; it +is used simply as a global. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will +vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release (02_07_01) + Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total + Debug Version: 136.9K Code, 56.4K Data, 193.3K Total + Current Release: + Non-Debug Version: 65.4K Code, 6.2K Data, 71.6K Total + Debug Version: 138.0K Code, 56.6K Data, 194.6K Total + + +2) Linux + +Updated Linux-specific code for core macro and OSL interface +changes described above. + +Improved /proc/acpi/event. It now can be opened only once and has +proper poll functionality. + +Fixed and restructured power management (acpi_bus). + +Only create /proc "view by type" when devices of that class +exist. + +Fixed "charging/discharging" bug (and others) in acpi_battery. + +Improved thermal zone code. + + +3) ASL Compiler, version X2039: + + +Implemented the new compiler restriction on ASL String hex/octal +escapes to non-null, ASCII values. An error results if an +invalid +value is used. (This will require an ACPI 2.0 specification +change.) + +AML object labels that are output to the optional C and ASM +source +are now prefixed with both the ACPI table signature and table ID +to help guarantee uniqueness within a large BIOS project. + + +---------------------------------------- +Summary of changes for this label: 02_01_02 + +1) ACPI CA Core Subsystem: + +ACPI 2.0 support is complete in the entire Core Subsystem and the +ASL compiler. All new ACPI 2.0 operators are implemented and all +other changes for ACPI 2.0 support are complete. With +simultaneous code and data optimizations throughout the +subsystem, +ACPI 2.0 support has been implemented with almost no additional +cost in terms of code and data size. + +Implemented a new mechanism for allocation of return buffers. If +the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will +be allocated on behalf of the caller. Consolidated all return +buffer validation and allocation to a common procedure. Return +buffers will be allocated via the primary OSL allocation +interface +since it appears that a separate pool is not needed by most +users. +If a separate pool is required for these buffers, the caller can +still use the original mechanism and pre-allocate the buffer(s). + +Implemented support for string operands within the DerefOf +operator. + +Restructured the Hardware and Event managers to be table driven, +simplifying the source code and reducing the amount of generated +code. + +Split the common read/write low-level ACPI register bitfield +procedure into a separate read and write, simplifying the code +considerably. + +Obsoleted the AcpiOsCallocate OSL interface. This interface was +used only a handful of times and didn't have enough critical mass +for a separate interface. Replaced with a common calloc +procedure +in the core. + +Fixed a reported problem with the GPE number mapping mechanism +that allows GPE1 numbers to be non-contiguous with GPE0. +Reorganized the GPE information and shrunk a large array that was +originally large enough to hold info for all possible GPEs (256) +to simply large enough to hold all GPEs up to the largest GPE +number on the machine. + +Fixed a reported problem with resource structure alignment on 64- +bit platforms. + +Changed the AcpiEnableEvent and AcpiDisableEvent external +interfaces to not require any flags for the common case of +enabling/disabling a GPE. + +Implemented support to allow a "Notify" on a Processor object. + +Most TBDs in comments within the source code have been resolved +and eliminated. + + +Fixed a problem in the interpreter where a standalone parent +prefix (^) was not handled correctly in the interpreter and +debugger. + +Removed obsolete and unnecessary GPE save/restore code. + +Implemented Field support in the ASL Load operator. This allows +a +table to be loaded from a named field, in addition to loading a +table directly from an Operation Region. + +Implemented timeout and handle support in the external Global +Lock +interfaces. + +Fixed a problem in the AcpiDump utility where pathnames were no +longer being generated correctly during the dump of named +objects. + +Modified the AML debugger to give a full display of if/while +predicates instead of just one AML opcode at a time. (The +predicate can have several nested ASL statements.) The old +method +was confusing during single stepping. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will +vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release (12_18_01) + Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total + Debug Version: 138.3K Code, 55.9K Data, 194.2K Total + Current Release: + Non-Debug Version: 65.2K Code, 6.2K Data, 71.4K Total + Debug Version: 136.9K Code, 56.4K Data, 193.3K Total + +2) Linux + + Implemented fix for PIIX reverse throttling errata (Processor +driver) + +Added new Limit interface (Processor and Thermal drivers) + +New thermal policy (Thermal driver) + +Many updates to /proc + +Battery "low" event support (Battery driver) + +Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers) + +IA32 - IA64 initialization unification, no longer experimental + +Menuconfig options redesigned + +3) ASL Compiler, version X2037: + +Implemented several new output features to simplify integration +of +AML code into firmware: 1) Output the AML in C source code with +labels for each named ASL object. The original ASL source +code +is interleaved as C comments. 2) Output the AML in ASM source +code +with labels and interleaved ASL source. 3) Output the AML in +raw hex table form, in either C or ASM. + +Implemented support for optional string parameters to the +LoadTable operator. + +Completed support for embedded escape sequences within string +literals. The compiler now supports all single character escapes +as well as the Octal and Hex escapes. Note: the insertion of a +null byte into a string literal (via the hex/octal escape) causes +the string to be immediately terminated. A warning is issued. + +Fixed a problem where incorrect AML was generated for the case +where an ASL namepath consists of a single parent prefix ( + +) with no trailing name segments. + +The compiler has been successfully generated with a 64-bit C +compiler. + + + + +---------------------------------------- +Summary of changes for this label: 12_18_01 + +1) Linux + +Enhanced blacklist with reason and severity fields. Any table's +signature may now be used to identify a blacklisted system. + +Call _PIC control method to inform the firmware which interrupt +model the OS is using. Turn on any disabled link devices. + +Cleaned up busmgr /proc error handling (Andreas Dilger) + + 2) ACPI CA Core Subsystem: + +Implemented ACPI 2.0 semantics for the "Break" operator (Exit +from +while loop) + +Completed implementation of the ACPI 2.0 "Continue", +"ConcatenateResTemplate", "DataTableRegion", and "LoadTable" +operators. All new ACPI 2.0 operators are now implemented in +both +the ASL compiler and the AML interpreter. The only remaining +ACPI +2.0 task is support for the String data type in the DerefOf +operator. Fixed a problem with AcquireMutex where the status +code +was lost if the caller had to actually wait for the mutex. + +Increased the maximum ASL Field size from 64K bits to 4G bits. + +Completed implementation of the external Global Lock interfaces - +- +AcpiAcquireGlobalLock and AcpiReleaseGlobalLock. The Timeout and +Handler parameters were added. + +Completed another pass at removing warnings and issues when +compiling with 64-bit compilers. The code now compiles cleanly +with the Intel 64-bit C/C++ compiler. Most notably, the pointer +add and subtract (diff) macros have changed considerably. + + +Created and deployed a new ACPI_SIZE type that is 64-bits wide on +64-bit platforms, 32-bits on all others. This type is used +wherever memory allocation and/or the C sizeof() operator is +used, +and affects the OSL memory allocation interfaces AcpiOsAllocate +and AcpiOsCallocate. + +Implemented sticky user breakpoints in the AML debugger. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release (12_05_01) + Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total + Debug Version: 136.2K Code, 55.6K Data, 191.8K Total + Current Release: + Non-Debug Version: 66.1K Code, 5.5K Data, 71.6K Total + Debug Version: 138.3K Code, 55.9K Data, 194.2K Total + + 3) ASL Compiler, version X2034: + +Now checks for (and generates an error if detected) the use of a +Break or Continue statement without an enclosing While statement. + + +Successfully generated the compiler with the Intel 64-bit C +compiler. + + ---------------------------------------- +Summary of changes for this label: 12_05_01 + + 1) ACPI CA Core Subsystem: + +The ACPI 2.0 CopyObject operator is fully implemented. This +operator creates a new copy of an object (and is also used to +bypass the "implicit conversion" mechanism of the Store +operator.) + +The ACPI 2.0 semantics for the SizeOf operator are fully +implemented. The change is that performing a SizeOf on a +reference object causes an automatic dereference of the object to +tha actual value before the size is evaluated. This behavior was +undefined in ACPI 1.0. + +The ACPI 2.0 semantics for the Extended IRQ resource descriptor +have been implemented. The interrupt polarity and mode are now +independently set. + +Fixed a problem where ASL Constants (Zero, One, Ones, Revision) +appearing in Package objects were not properly converted to +integers when the internal Package was converted to an external +object (via the AcpiEvaluateObject interface.) + +Fixed a problem with the namespace object deletion mechanism for +objects created by control methods. There were two parts to this +problem: 1) Objects created during the initialization phase +method +parse were not being deleted, and 2) The object owner ID +mechanism +to track objects was broken. + +Fixed a problem where the use of the ASL Scope operator within a +control method would result in an invalid opcode exception. + +Fixed a problem introduced in the previous label where the buffer +length required for the _PRT structure was not being returned +correctly. + +Code and Data Size: Current core subsystem library sizes are +shown +below. These are the code and data sizes for the acpica.lib +produced by the Microsoft Visual C++ 6.0 compiler, and these +values do not include any ACPI driver or OSPM code. The debug +version of the code includes the debug output trace mechanism and +has a larger code and data size. Note that these values will +vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Release (11_20_01) + Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total + Debug Version: 135.1K Code, 55.4K Data, 190.5K Total + + Current Release: + Non-Debug Version: 64.7K Code, 5.3K Data, 70.0K Total + Debug Version: 136.2K Code, 55.6K Data, 191.8K Total + + 2) Linux: + +Updated all files to apply cleanly against 2.4.16. + +Added basic PCI Interrupt Routing Table (PRT) support for IA32 +(acpi_pci.c), and unified the PRT code for IA32 and IA64. This +version supports both static and dyanmic PRT entries, but dynamic +entries are treated as if they were static (not yet +reconfigurable). Architecture- specific code to use this data is +absent on IA32 but should be available shortly. + +Changed the initialization sequence to start the ACPI interpreter +(acpi_init) prior to initialization of the PCI driver (pci_init) +in init/main.c. This ordering is required to support PRT and +facilitate other (future) enhancement. A side effect is that the +ACPI bus driver and certain device drivers can no longer be +loaded +as modules. + +Modified the 'make menuconfig' options to allow PCI Interrupt +Routing support to be included without the ACPI Bus and other +device drivers. + + 3) ASL Compiler, version X2033: + +Fixed some issues with the use of the new CopyObject and +DataTableRegion operators. Both are fully functional. + + ---------------------------------------- +Summary of changes for this label: 11_20_01 + + 20 November 2001. Summary of changes for this release. + + 1) ACPI CA Core Subsystem: + +Updated Index support to match ACPI 2.0 semantics. Storing a +Integer, String, or Buffer to an Index of a Buffer will store +only +the least-significant byte of the source to the Indexed buffer +byte. Multiple writes are not performed. + +Fixed a problem where the access type used in an AccessAs ASL +operator was not recorded correctly into the field object. + +Fixed a problem where ASL Event objects were created in a +signalled state. Events are now created in an unsignalled state. + +The internal object cache is now purged after table loading and +initialization to reduce the use of dynamic kernel memory -- on +the assumption that object use is greatest during the parse phase +of the entire table (versus the run-time use of individual +control +methods.) + +ACPI 2.0 variable-length packages are now fully operational. + +Code and Data Size: Code and Data optimizations have permitted +new +feature development with an actual reduction in the library size. +Current core subsystem library sizes are shown below. These are +the code and data sizes for the acpica.lib produced by the +Microsoft Visual C++ 6.0 compiler, and these values do not +include +any ACPI driver or OSPM code. The debug version of the code +includes the debug output trace mechanism and has a larger code +and data size. Note that these values will vary depending on the +efficiency of the compiler and the compiler options used during +generation. + + Previous Release (11_09_01): + Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total + Debug Version: 134.5K Code, 55.4K Data, 189.9K Total + + Current Release: + Non-Debug Version: 64.1K Code, 5.3K Data, 69.4K Total + Debug Version: 135.1K Code, 55.4K Data, 190.5K Total + + 2) Linux: + +Enhanced the ACPI boot-time initialization code to allow the use +of Local APIC tables for processor enumeration on IA-32, and to +pave the way for a fully MPS-free boot (on SMP systems) in the +near future. This functionality replaces +arch/i386/kernel/acpitables.c, which was introduced in an earlier +2.4.15-preX release. To enable this feature you must add +"acpi_boot=on" to the kernel command line -- see the help entry +for CONFIG_ACPI_BOOT for more information. An IA-64 release is +in +the works... + +Restructured the configuration options to allow boot-time table +parsing support without inclusion of the ACPI Interpreter (and +other) code. + +NOTE: This release does not include fixes for the reported +events, +power-down, and thermal passive cooling issues (coming soon). + + 3) ASL Compiler: + +Added additional typechecking for Fields within restricted access +Operation Regions. All fields within EC and CMOS regions must be +declared with ByteAcc. All fields withing SMBus regions must be +declared with the BufferAcc access type. + +Fixed a problem where the listing file output of control methods +no longer interleaved the actual AML code with the ASL source +code. + + + + +---------------------------------------- +Summary of changes for this label: 11_09_01 + +1) ACPI CA Core Subsystem: + +Implemented ACPI 2.0-defined support for writes to fields with a +Buffer, String, or Integer source operand that is smaller than +the +target field. In these cases, the source operand is zero-extended +to fill the target field. + +Fixed a problem where a Field starting bit offset (within the +parent operation region) was calculated incorrectly if the + +alignment of the field differed from the access width. This +affected CreateWordField, CreateDwordField, CreateQwordField, and +possibly other fields that use the "AccessAny" keyword. + +Fixed a problem introduced in the 11_02_01 release where indirect +stores through method arguments did not operate correctly. + +2) Linux: + +Implemented boot-time ACPI table parsing support +(CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems. This code +facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than +legacy BIOS interfaces (e.g. MPS) for the configuration of system +processors, memory, and interrupts during setup_arch(). Note +that +this patch does not include the required architecture-specific +changes required to apply this information -- subsequent patches +will be posted for both IA32 and IA64 to achieve this. + +Added low-level sleep support for IA32 platforms, courtesy of Pat +Mochel. This allows IA32 systems to transition to/from various +sleeping states (e.g. S1, S3), although the lack of a centralized +driver model and power-manageable drivers will prevent its +(successful) use on most systems. + +Revamped the ACPI 'menuconfig' layout: created new "ACPI Support" +submenu, unified IA32 and IA64 options, added new "Boot using +ACPI +tables" option, etc. + +Increased the default timeout for the EC driver from 1ms to 10ms +(1000 cycles of 10us) to try to address AE_TIME errors during EC +transactions. + + ---------------------------------------- +Summary of changes for this label: 11_02_01 + +1) ACPI CA Core Subsystem: + +ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access +(QWordAcc keyword). All ACPI 2.0 64-bit support is now +implemented. + +OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required +changes to support ACPI 2.0 Qword field access. Read/Write +PciConfiguration(), Read/Write Memory(), and Read/Write Port() +now +accept an ACPI_INTEGER (64 bits) as the value parameter. Also, +the value parameter for the address space handler interface is +now +an ACPI_INTEGER. OSL implementations of these interfaces must +now +handle the case where the Width parameter is 64. + +Index Fields: Fixed a problem where unaligned bit assembly and +disassembly for IndexFields was not supported correctly. + +Index and Bank Fields: Nested Index and Bank Fields are now +supported. During field access, a check is performed to ensure +that the value written to an Index or Bank register is not out of +the range of the register. The Index (or Bank) register is +written before each access to the field data. Future support will +include allowing individual IndexFields to be wider than the +DataRegister width. + +Fields: Fixed a problem where the AML interpreter was incorrectly +attempting to write beyond the end of a Field/OpRegion. This was +a boundary case that occurred when a DWORD field was written to a +BYTE access OpRegion, forcing multiple writes and causing the +interpreter to write one datum too many. + +Fields: Fixed a problem with Field/OpRegion access where the +starting bit address of a field was incorrectly calculated if the +current access type was wider than a byte (WordAcc, DwordAcc, or +QwordAcc). + +Fields: Fixed a problem where forward references to individual +FieldUnits (individual Field names within a Field definition) +were +not resolved during the AML table load. + +Fields: Fixed a problem where forward references from a Field +definition to the parent Operation Region definition were not +resolved during the AML table load. + +Fields: Duplicate FieldUnit names within a scope are now detected +during AML table load. + +Acpi Interfaces: Fixed a problem where the AcpiGetName() +interface +returned an incorrect name for the root node. + +Code and Data Size: Code and Data optimizations have permitted +new +feature development with an actual reduction in the library size. +Current core subsystem library sizes are shown below. These are +the code and data sizes for the acpica.lib produced by the +Microsoft Visual C++ 6.0 compiler, and these values do not +include +any ACPI driver or OSPM code. The debug version of the code +includes the debug output trace mechanism and has a larger code +and data size. Note that these values will vary depending on the +efficiency of the compiler and the compiler options used during +generation. + + Previous Release (10_18_01): + Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total + Debug Version: 136.7K Code, 57.4K Data, 194.2K Total + + Current Release: + Non-Debug Version: 63.7K Code, 5.2K Data, 68.9K Total + Debug Version: 134.5K Code, 55.4K Data, 189.9K Total + + 2) Linux: + +Improved /proc processor output (Pavel Machek) Re-added +MODULE_LICENSE("GPL") to all modules. + + 3) ASL Compiler version X2030: + +Duplicate FieldUnit names within a scope are now detected and +flagged as errors. + + 4) Documentation: + +Programmer Reference updated to reflect OSL and address space +handler interface changes described above. + +---------------------------------------- +Summary of changes for this label: 10_18_01 + +ACPI CA Core Subsystem: + +Fixed a problem with the internal object reference count +mechanism +that occasionally caused premature object deletion. This resolves +all of the outstanding problem reports where an object is deleted +in the middle of an interpreter evaluation. Although this +problem +only showed up in rather obscure cases, the solution to the +problem involved an adjustment of all reference counts involving +objects attached to namespace nodes. + +Fixed a problem with Field support in the interpreter where +writing to an aligned field whose length is an exact multiple (2 +or greater) of the field access granularity would cause an +attempt +to write beyond the end of the field. + +The top level AML opcode execution functions within the +interpreter have been renamed with a more meaningful and +consistent naming convention. The modules exmonad.c and +exdyadic.c were eliminated. New modules are exoparg1.c, +exoparg2.c, exoparg3.c, and exoparg6.c. + +Support for the ACPI 2.0 "Mid" ASL operator has been implemented. + +Fixed a problem where the AML debugger was causing some internal +objects to not be deleted during subsystem termination. + +Fixed a problem with the external AcpiEvaluateObject interface +where the subsystem would fault if the named object to be +evaluated refered to a constant such as Zero, Ones, etc. + +Fixed a problem with IndexFields and BankFields where the +subsystem would fault if the index, data, or bank registers were +not defined in the same scope as the field itself. + +Added printf format string checking for compilers that support +this feature. Corrected more than 50 instances of issues with +format specifiers within invocations of ACPI_DEBUG_PRINT +throughout the core subsystem code. + +The ASL "Revision" operator now returns the ACPI support level +implemented in the core - the value "2" since the ACPI 2.0 +support +is more than 50% implemented. + +Enhanced the output of the AML debugger "dump namespace" command +to output in a more human-readable form. + +Current core subsystem library code sizes are shown below. These + +are the code and data sizes for the acpica.lib produced by the +Microsoft Visual C++ 6.0 compiler, and these values do not +include +any ACPI driver or OSPM code. The debug version of the code +includes the full debug trace mechanism -- leading to a much + +larger code and data size. Note that these values will vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Previous Label (09_20_01): + Non-Debug Version: 65K Code, 5K Data, 70K Total + Debug Version: 138K Code, 58K Data, 196K Total + + This Label: + + Non-Debug Version: 63.9K Code, 5.1K Data, 69.0K Total + Debug Version: 136.7K Code, 57.4K Data, 194.2K Total + +Linux: + +Implemented a "Bad BIOS Blacklist" to track machines that have +known ASL/AML problems. + +Enhanced the /proc interface for the thermal zone driver and +added +support for _HOT (the critical suspend trip point). The 'info' +file now includes threshold/policy information, and allows +setting +of _SCP (cooling preference) and _TZP (polling frequency) values +to the 'info' file. Examples: "echo tzp=5 > info" sets the +polling +frequency to 5 seconds, and "echo scp=1 > info" sets the cooling +preference to the passive/quiet mode (if supported by the ASL). + +Implemented a workaround for a gcc bug that resuted in an OOPs +when loading the control method battery driver. + + ---------------------------------------- +Summary of changes for this label: 09_20_01 + + ACPI CA Core Subsystem: + +The AcpiEnableEvent and AcpiDisableEvent interfaces have been +modified to allow individual GPE levels to be flagged as wake- +enabled (i.e., these GPEs are to remain enabled when the platform +sleeps.) + +The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now +support wake-enabled GPEs. This means that upon entering the +sleep state, all GPEs that are not wake-enabled are disabled. +When leaving the sleep state, these GPEs are reenabled. + +A local double-precision divide/modulo module has been added to +enhance portability to OS kernels where a 64-bit math library is +not available. The new module is "utmath.c". + +Several optimizations have been made to reduce the use of CPU +stack. Originally over 2K, the maximum stack usage is now below +2K at 1860 bytes (1.82k) + +Fixed a problem with the AcpiGetFirmwareTable interface where the +root table pointer was not mapped into a logical address +properly. + +Fixed a problem where a NULL pointer was being dereferenced in +the +interpreter code for the ASL Notify operator. + +Fixed a problem where the use of the ASL Revision operator +returned an error. This operator now returns the current version +of the ACPI CA core subsystem. + +Fixed a problem where objects passed as control method parameters +to AcpiEvaluateObject were always deleted at method termination. +However, these objects may end up being stored into the namespace +by the called method. The object reference count mechanism was +applied to these objects instead of a force delete. + +Fixed a problem where static strings or buffers (contained in the +AML code) that are declared as package elements within the ASL +code could cause a fault because the interpreter would attempt to +delete them. These objects are now marked with the "static +object" flag to prevent any attempt to delete them. + +Implemented an interpreter optimization to use operands directly +from the state object instead of extracting the operands to local +variables. This reduces stack use and code size, and improves +performance. + +The module exxface.c was eliminated as it was an unnecessary +extra +layer of code. + +Current core subsystem library code sizes are shown below. These +are the code and data sizes for the acpica.lib produced by the +Microsoft Visual C++ 6.0 compiler, and these values do not +include +any ACPI driver or OSPM code. The debug version of the code +includes the full debug trace mechanism -- leading to a much +larger code and data size. Note that these values will vary +depending on the efficiency of the compiler and the compiler +options used during generation. + + Non-Debug Version: 65K Code, 5K Data, 70K Total +(Previously 69K) Debug Version: 138K Code, 58K Data, 196K +Total (Previously 195K) + +Linux: + +Support for ACPI 2.0 64-bit integers has been added. All ACPI +Integer objects are now 64 bits wide + +All Acpi data types and structures are now in lower case. Only +Acpi macros are upper case for differentiation. + + Documentation: + +Changes to the external interfaces as described above. + + ---------------------------------------- +Summary of changes for this label: 08_31_01 + + ACPI CA Core Subsystem: + +A bug with interpreter implementation of the ASL Divide operator +was found and fixed. The implicit function return value (not the +explicit store operands) was returning the remainder instead of +the quotient. This was a longstanding bug and it fixes several +known outstanding issues on various platforms. + +The ACPI_DEBUG_PRINT and function trace entry/exit macros have +been further optimized for size. There are 700 invocations of +the +DEBUG_PRINT macro alone, so each optimization reduces the size of +the debug version of the subsystem significantly. + +A stack trace mechanism has been implemented. The maximum stack +usage is about 2K on 32-bit platforms. The debugger command +"stat +stack" will display the current maximum stack usage. + +All public symbols and global variables within the subsystem are +now prefixed with the string "Acpi". This keeps all of the +symbols grouped together in a kernel map, and avoids conflicts +with other kernel subsystems. + +Most of the internal fixed lookup tables have been moved into the +code segment via the const operator. + +Several enhancements have been made to the interpreter to both +reduce the code size and improve performance. + +Current core subsystem library code sizes are shown below. These +are the code and data sizes for the acpica.lib produced by the +Microsoft Visual C++ 6.0 compiler, and these values do not +include +any ACPI driver or OSPM code. The debug version of the code +includes the full debug trace mechanism which contains over 700 +invocations of the DEBUG_PRINT macro, 500 function entry macro +invocations, and over 900 function exit macro invocations -- +leading to a much larger code and data size. Note that these +values will vary depending on the efficiency of the compiler and +the compiler options used during generation. + + Non-Debug Version: 64K Code, 5K Data, 69K Total +Debug Version: 137K Code, 58K Data, 195K Total + + Linux: + +Implemented wbinvd() macro, pending a kernel-wide definition. + +Fixed /proc/acpi/event to handle poll() and short reads. + + ASL Compiler, version X2026: + +Fixed a problem introduced in the previous label where the AML + +code emitted for package objects produced packages with zero +length. + + ---------------------------------------- +Summary of changes for this label: 08_16_01 + +ACPI CA Core Subsystem: + +The following ACPI 2.0 ASL operators have been implemented in the +AML interpreter (These are already supported by the Intel ASL +compiler): ToDecimalString, ToHexString, ToString, ToInteger, +and +ToBuffer. Support for 64-bit AML constants is implemented in the +AML parser, debugger, and disassembler. + +The internal memory tracking mechanism (leak detection code) has +been upgraded to reduce the memory overhead (a separate tracking +block is no longer allocated for each memory allocation), and now +supports all of the internal object caches. + +The data structures and code for the internal object caches have +been coelesced and optimized so that there is a single cache and +memory list data structure and a single group of functions that +implement generic cache management. This has reduced the code +size in both the debug and release versions of the subsystem. + +The DEBUG_PRINT macro(s) have been optimized for size and +replaced +by ACPI_DEBUG_PRINT. The syntax for this macro is slightly +different, because it generates a single call to an internal +function. This results in a savings of about 90 bytes per +invocation, resulting in an overall code and data savings of +about +16% in the debug version of the subsystem. + + Linux: + +Fixed C3 disk corruption problems and re-enabled C3 on supporting +machines. + +Integrated low-level sleep code by Patrick Mochel. + +Further tweaked source code Linuxization. + +Other minor fixes. + + ASL Compiler: + +Support for ACPI 2.0 variable length packages is fixed/completed. + +Fixed a problem where the optional length parameter for the ACPI +2.0 ToString operator. + +Fixed multiple extraneous error messages when a syntax error is +detected within the declaration line of a control method. + + ---------------------------------------- +Summary of changes for this label: 07_17_01 + +ACPI CA Core Subsystem: + +Added a new interface named AcpiGetFirmwareTable to obtain any +ACPI table via the ACPI signature. The interface can be called +at +any time during kernel initialization, even before the kernel +virtual memory manager is initialized and paging is enabled. +This +allows kernel subsystems to obtain ACPI tables very early, even +before the ACPI CA subsystem is initialized. + +Fixed a problem where Fields defined with the AnyAcc attribute +could be resolved to the incorrect address under the following +conditions: 1) the field width is larger than 8 bits and 2) the +parent operation region is not defined on a DWORD boundary. + +Fixed a problem where the interpreter is not being locked during +namespace initialization (during execution of the _INI control +methods), causing an error when an attempt is made to release it +later. + +ACPI 2.0 support in the AML Interpreter has begun and will be +ongoing throughout the rest of this year. In this label, The Mod +operator is implemented. + +Added a new data type to contain full PCI addresses named +ACPI_PCI_ID. This structure contains the PCI Segment, Bus, +Device, +and Function values. + + Linux: + +Enhanced the Linux version of the source code to change most +capitalized ACPI type names to lowercase. For example, all +instances of ACPI_STATUS are changed to acpi_status. This will +result in a large diff, but the change is strictly cosmetic and +aligns the CA code closer to the Linux coding standard. + +OSL Interfaces: + +The interfaces to the PCI configuration space have been changed +to +add the PCI Segment number and to split the single 32-bit +combined +DeviceFunction field into two 16-bit fields. This was +accomplished by moving the four values that define an address in +PCI configuration space (segment, bus, device, and function) to +the new ACPI_PCI_ID structure. + +The changes to the PCI configuration space interfaces led to a +reexamination of the complete set of address space access +interfaces for PCI, I/O, and Memory. The previously existing 18 +interfaces have proven difficult to maintain (any small change +must be propagated across at least 6 interfaces) and do not +easily +allow for future expansion to 64 bits if necessary. Also, on +some +systems, it would not be appropriate to demultiplex the access +width (8, 16, 32,or 64) before calling the OSL if the +corresponding native OS interfaces contain a similar access width +parameter. For these reasons, the 18 address space interfaces +have been replaced by these 6 new ones: + +AcpiOsReadPciConfiguration +AcpiOsWritePciConfiguration +AcpiOsReadMemory +AcpiOsWriteMemory +AcpiOsReadPort +AcpiOsWritePort + +Added a new interface named AcpiOsGetRootPointer to allow the OSL +to perform the platform and/or OS-specific actions necessary to +obtain the ACPI RSDP table pointer. On IA-32 platforms, this +interface will simply call down to the CA core to perform the low- +memory search for the table. On IA-64, the RSDP is obtained from +EFI. Migrating this interface to the OSL allows the CA core to + +remain OS and platform independent. + +Added a new interface named AcpiOsSignal to provide a generic +"function code and pointer" interface for various miscellaneous +signals and notifications that must be made to the host OS. The +first such signals are intended to support the ASL Fatal and +Breakpoint operators. In the latter case, the AcpiOsBreakpoint +interface has been obsoleted. + +The definition of the AcpiFormatException interface has been +changed to simplify its use. The caller no longer must supply a +buffer to the call; A pointer to a const string is now returned +directly. This allows the call to be easily used in printf +statements, etc. since the caller does not have to manage a local +buffer. + + + ASL Compiler, Version X2025: + +The ACPI 2.0 Switch/Case/Default operators have been implemented +and are fully functional. They will work with all ACPI 1.0 +interpreters, since the operators are simply translated to +If/Else +pairs. + +The ACPI 2.0 ElseIf operator is implemented and will also work +with 1.0 interpreters, for the same reason. + +Implemented support for ACPI 2.0 variable-length packages. These +packages have a separate opcode, and their size is determined by +the interpreter at run-time. + +Documentation The ACPI CA Programmer Reference has been updated +to +reflect the new interfaces and changes to existing interfaces. + + ------------------------------------------ +Summary of changes for this label: 06_15_01 + + ACPI CA Core Subsystem: + +Fixed a problem where a DWORD-accessed field within a Buffer +object would get its byte address inadvertently rounded down to +the nearest DWORD. Buffers are always Byte-accessible. + + ASL Compiler, version X2024: + +Fixed a problem where the Switch() operator would either fault or +hang the compiler. Note however, that the AML code for this ACPI +2.0 operator is not yet implemented. + +Compiler uses the new AcpiOsGetTimer interface to obtain compile +timings. + +Implementation of the CreateField operator automatically converts +a reference to a named field within a resource descriptor from a +byte offset to a bit offset if required. + +Added some missing named fields from the resource descriptor +support. These are the names that are automatically created by +the +compiler to reference fields within a descriptor. They are only +valid at compile time and are not passed through to the AML +interpreter. + +Resource descriptor named fields are now typed as Integers and +subject to compile-time typechecking when used in expressions. + + ------------------------------------------ +Summary of changes for this label: 05_18_01 + + ACPI CA Core Subsystem: + +Fixed a couple of problems in the Field support code where bits +from adjacent fields could be returned along with the proper +field +bits. Restructured the field support code to improve performance, +readability and maintainability. + +New DEBUG_PRINTP macro automatically inserts the procedure name +into the output, saving hundreds of copies of procedure name +strings within the source, shrinking the memory footprint of the +debug version of the core subsystem. + + Source Code Structure: + +The source code directory tree was restructured to reflect the +current organization of the component architecture. Some files +and directories have been moved and/or renamed. + + Linux: + +Fixed leaking kacpidpc processes. + +Fixed queueing event data even when /proc/acpi/event is not +opened. + + ASL Compiler, version X2020: + +Memory allocation performance enhancement - over 24X compile time +improvement on large ASL files. Parse nodes and namestring +buffers are now allocated from a large internal compiler buffer. + +The temporary .SRC file is deleted unless the "-s" option is +specified + +The "-d" debug output option now sends all output to the .DBG +file +instead of the console. + +"External" second parameter is now optional + +"ElseIf" syntax now properly allows the predicate + +Last operand to "Load" now recognized as a Target operand + +Debug object can now be used anywhere as a normal object. + +ResourceTemplate now returns an object of type BUFFER + +EISAID now returns an object of type INTEGER + +"Index" now works with a STRING operand + +"LoadTable" now accepts optional parameters + +"ToString" length parameter is now optional + +"Interrupt (ResourceType," parse error fixed. + +"Register" with a user-defined region space parse error fixed + +Escaped backslash at the end of a string ("\\") scan/parse error +fixed + +"Revision" is now an object of type INTEGER. + + + +------------------------------------------ +Summary of changes for this label: 05_02_01 + +Linux: + +/proc/acpi/event now blocks properly. + +Removed /proc/sys/acpi. You can still dump your DSDT from +/proc/acpi/dsdt. + + ACPI CA Core Subsystem: + +Fixed a problem introduced in the previous label where some of +the +"small" resource descriptor types were not recognized. + +Improved error messages for the case where an ASL Field is +outside +the range of the parent operation region. + + ASL Compiler, version X2018: + + +Added error detection for ASL Fields that extend beyond the +length +of the parent operation region (only if the length of the region +is known at compile time.) This includes fields that have a +minimum access width that is smaller than the parent region, and +individual field units that are partially or entirely beyond the +extent of the parent. + + + +------------------------------------------ +Summary of changes for this label: 04_27_01 + + ACPI CA Core Subsystem: + +Fixed a problem where the namespace mutex could be released at +the +wrong time during execution of AcpiRemoveAddressSpaceHandler. + +Added optional thread ID output for debug traces, to simplify +debugging of multiple threads. Added context switch notification +when the debug code realizes that a different thread is now +executing ACPI code. + +Some additional external data types have been prefixed with the +string "ACPI_" for consistency. This may effect existing code. +The data types affected are the external callback typedefs - +e.g., + +WALK_CALLBACK becomes ACPI_WALK_CALLBACK. + + Linux: + +Fixed an issue with the OSL semaphore implementation where a +thread was waking up with an error from receiving a SIGCHLD +signal. + +Linux version of ACPI CA now uses the system C library for string +manipulation routines instead of a local implementation. + +Cleaned up comments and removed TBDs. + + ASL Compiler, version X2017: + +Enhanced error detection and reporting for all file I/O +operations. + + Documentation: + +Programmer Reference updated to version 1.06. + + + +------------------------------------------ +Summary of changes for this label: 04_13_01 + + ACPI CA Core Subsystem: + +Restructured support for BufferFields and RegionFields. +BankFields support is now fully operational. All known 32-bit +limitations on field sizes have been removed. Both BufferFields +and (Operation) RegionFields are now supported by the same field +management code. + +Resource support now supports QWORD address and IO resources. The +16/32/64 bit address structures and the Extended IRQ structure +have been changed to properly handle Source Resource strings. + +A ThreadId of -1 is now used to indicate a "mutex not acquired" +condition internally and must never be returned by +AcpiOsThreadId. +This reserved value was changed from 0 since Unix systems allow a +thread ID of 0. + +Linux: + +Driver code reorganized to enhance portability + +Added a kernel configuration option to control ACPI_DEBUG + +Fixed the EC driver to honor _GLK. + +ASL Compiler, version X2016: + +Fixed support for the "FixedHw" keyword. Previously, the FixedHw +address space was set to 0, not 0x7f as it should be. + + ------------------------------------------ +Summary of changes for this label: 03_13_01 + + ACPI CA Core Subsystem: + +During ACPI initialization, the _SB_._INI method is now run if +present. + +Notify handler fix - notifies are deferred until the parent +method +completes execution. This fixes the "mutex already acquired" +issue seen occasionally. + +Part of the "implicit conversion" rules in ACPI 2.0 have been +found to cause compatibility problems with existing ASL/AML. The +convert "result-to-target-type" implementation has been removed +for stores to method Args and Locals. Source operand conversion +is still fully implemented. Possible changes to ACPI 2.0 +specification pending. + +Fix to AcpiRsCalculatePciRoutingTableLength to return correct +length. + +Fix for compiler warnings for 64-bit compiles. + + Linux: + +/proc output aligned for easier parsing. + +Release-version compile problem fixed. + +New kernel configuration options documented in Configure.help. + +IBM 600E - Fixed Sleep button may generate "Invalid <NULL> +context" message. + + OSPM: + +Power resource driver integrated with bus manager. + +Fixed kernel fault during active cooling for thermal zones. + +Source Code: + +The source code tree has been restructured. + + + +------------------------------------------ +Summary of changes for this label: 03_02_01 + + Linux OS Services Layer (OSL): + +Major revision of all Linux-specific code. + +Modularized all ACPI-specific drivers. + +Added new thermal zone and power resource drivers. + +Revamped /proc interface (new functionality is under /proc/acpi). + +New kernel configuration options. + + Linux known issues: + +New kernel configuration options not documented in Configure.help +yet. + + +Module dependencies not currently implemented. If used, they +should be loaded in this order: busmgr, power, ec, system, +processor, battery, ac_adapter, button, thermal. + +Modules will not load if CONFIG_MODVERSION is set. + +IBM 600E - entering S5 may reboot instead of shutting down. + +IBM 600E - Sleep button may generate "Invalid <NULL> context" +message. + +Some systems may fail with "execution mutex already acquired" +message. + + ACPI CA Core Subsystem: + +Added a new OSL Interface, AcpiOsGetThreadId. This was required +for the deadlock detection code. Defined to return a non-zero, +32- +bit thread ID for the currently executing thread. May be a non- +zero constant integer on single-thread systems. + +Implemented deadlock detection for internal subsystem mutexes. +We +may add conditional compilation for this code (debug only) later. + +ASL/AML Mutex object semantics are now fully supported. This +includes multiple acquires/releases by owner and support for the + +Mutex SyncLevel parameter. + +A new "Force Release" mechanism automatically frees all ASL +Mutexes that have been acquired but not released when a thread +exits the interpreter. This forces conformance to the ACPI spec +("All mutexes must be released when an invocation exits") and +prevents deadlocked ASL threads. This mechanism can be expanded +(later) to monitor other resource acquisitions if OEM ASL code +continues to misbehave (which it will). + +Several new ACPI exception codes have been added for the Mutex +support. + +Recursive method calls are now allowed and supported (the ACPI +spec does in fact allow recursive method calls.) The number of +recursive calls is subject to the restrictions imposed by the +SERIALIZED method keyword and SyncLevel (ACPI 2.0) method +parameter. + +Implemented support for the SyncLevel parameter for control +methods (ACPI 2.0 feature) + +Fixed a deadlock problem when multiple threads attempted to use +the interpreter. + +Fixed a problem where the string length of a String package +element was not always set in a package returned from +AcpiEvaluateObject. + +Fixed a problem where the length of a String package element was +not always included in the length of the overall package returned +from AcpiEvaluateObject. + +Added external interfaces (Acpi*) to the ACPI debug memory +manager. This manager keeps a list of all outstanding +allocations, and can therefore detect memory leaks and attempts +to +free memory blocks more than once. Useful for code such as the +power manager, etc. May not be appropriate for device drivers. +Performance with the debug code enabled is slow. + +The ACPI Global Lock is now an optional hardware element. + + ASL Compiler Version X2015: + +Integrated changes to allow the compiler to be generated on +multiple platforms. + +Linux makefile added to generate the compiler on Linux + + Source Code: + +All platform-specific headers have been moved to their own +subdirectory, Include/Platform. + +New source file added, Interpreter/ammutex.c + +New header file, Include/acstruct.h + + Documentation: + +The programmer reference has been updated for the following new +interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree + + ------------------------------------------ +Summary of changes for this label: 02_08_01 + +Core ACPI CA Subsystem: Fixed a problem where an error was +incorrectly returned if the return resource buffer was larger +than +the actual data (in the resource interfaces). + +References to named objects within packages are resolved to the + +full pathname string before packages are returned directly (via +the AcpiEvaluateObject interface) or indirectly via the resource +interfaces. + +Linux OS Services Layer (OSL): + +Improved /proc battery interface. + + +Added C-state debugging output and other miscellaneous fixes. + +ASL Compiler Version X2014: + +All defined method arguments can now be used as local variables, +including the ones that are not actually passed in as parameters. +The compiler tracks initialization of the arguments and issues an +exception if they are used without prior assignment (just like +locals). + +The -o option now specifies a filename prefix that is used for +all +output files, including the AML output file. Otherwise, the +default behavior is as follows: 1) the AML goes to the file +specified in the DSDT. 2) all other output files use the input +source filename as the base. + + ------------------------------------------ +Summary of changes for this label: 01_25_01 + +Core ACPI CA Subsystem: Restructured the implementation of object +store support within the interpreter. This includes support for +the Store operator as well as any ASL operators that include a +target operand. + +Partially implemented support for Implicit Result-to-Target +conversion. This is when a result object is converted on the fly +to the type of an existing target object. Completion of this +support is pending further analysis of the ACPI specification +concerning this matter. + +CPU-specific code has been removed from the subsystem (hardware +directory). + +New Power Management Timer functions added + +Linux OS Services Layer (OSL): Moved system state transition code +to the core, fixed it, and modified Linux OSL accordingly. + +Fixed C2 and C3 latency calculations. + + +We no longer use the compilation date for the version message on +initialization, but retrieve the version from +AcpiGetSystemInfo(). + +Incorporated for fix Sony VAIO machines. + +Documentation: The Programmer Reference has been updated and +reformatted. + + +ASL Compiler: Version X2013: Fixed a problem where the line +numbering and error reporting could get out of sync in the +presence of multiple include files. + + ------------------------------------------ +Summary of changes for this label: 01_15_01 + +Core ACPI CA Subsystem: + +Implemented support for type conversions in the execution of the +ASL Concatenate operator (The second operand is converted to +match the type of the first operand before concatenation.) + +Support for implicit source operand conversion is partially +implemented. The ASL source operand types Integer, Buffer, and +String are freely interchangeable for most ASL operators and are +converted by the interpreter on the fly as required. Implicit +Target operand conversion (where the result is converted to the +target type before storing) is not yet implemented. + +Support for 32-bit and 64-bit BCD integers is implemented. + +Problem fixed where a field read on an aligned field could cause +a +read past the end of the field. + +New exception, AE_AML_NO_RETURN_VALUE, is returned when a method +does not return a value, but the caller expects one. (The ASL +compiler flags this as a warning.) + +ASL Compiler: + +Version X2011: +1. Static typechecking of all operands is implemented. This +prevents the use of invalid objects (such as using a Package +where +an Integer is required) at compile time instead of at interpreter +run-time. +2. The ASL source line is printed with ALL errors and warnings. +3. Bug fix for source EOF without final linefeed. +4. Debug option is split into a parse trace and a namespace +trace. +5. Namespace output option (-n) includes initial values for +integers and strings. +6. Parse-only option added for quick syntax checking. +7. Compiler checks for duplicate ACPI name declarations + +Version X2012: +1. Relaxed typechecking to allow interchangeability between +strings, integers, and buffers. These types are now converted by +the interpreter at runtime. +2. Compiler reports time taken by each internal subsystem in the +debug output file. + + + ------------------------------------------ +Summary of changes for this label: 12_14_00 + +ASL Compiler: + +This is the first official release of the compiler. Since the +compiler requires elements of the Core Subsystem, this label +synchronizes everything. + +------------------------------------------ +Summary of changes for this label: 12_08_00 + + +Fixed a problem where named references within the ASL definition +of both OperationRegions and CreateXXXFields did not work +properly. The symptom was an AE_AML_OPERAND_TYPE during +initialization of the region/field. This is similar (but not +related internally) to the problem that was fixed in the last +label. + +Implemented both 32-bit and 64-bit support for the BCD ASL +functions ToBCD and FromBCD. + +Updated all legal headers to include "2000" in the copyright +years. + + ------------------------------------------ +Summary of changes for this label: 12_01_00 + +Fixed a problem where method invocations within the ASL +definition +of both OperationRegions and CreateXXXFields did not work +properly. The symptom was an AE_AML_OPERAND_TYPE during +initialization of the region/field: + + nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments +[DEBG] ammonad-0284: Exec_monadic2_r/Not: bad operand(s) +(0x3005) + +Fixed a problem where operators with more than one nested +subexpression would fail. The symptoms were varied, by mostly +AE_AML_OPERAND_TYPE errors. This was actually a rather serious +problem that has gone unnoticed until now. + + Subtract (Add (1,2), Multiply (3,4)) + +Fixed a problem where AcpiGetHandle didn't quite get fixed in the +previous build (The prefix part of a relative path was handled +incorrectly). + +Fixed a problem where Operation Region initialization failed if +the operation region name was a "namepath" instead of a simple +"nameseg". Symptom was an AE_NO_OPERAND error. + +Fixed a problem where an assignment to a local variable via the +indirect RefOf mechanism only worked for the first such +assignment. Subsequent assignments were ignored. + + ------------------------------------------ +Summary of changes for this label: 11_15_00 + +ACPI 2.0 table support with backwards support for ACPI 1.0 and +the +0.71 extensions. Note: although we can read ACPI 2.0 BIOS +tables, +the AML interpreter does NOT have support for the new 2.0 ASL +grammar terms at this time. + +All ACPI hardware access is via the GAS structures in the ACPI +2.0 +FADT. + +All physical memory addresses across all platforms are now 64 +bits +wide. Logical address width remains dependent on the platform +(i.e., "void *"). + +AcpiOsMapMemory interface changed to a 64-bit physical address. + +The AML interpreter integer size is now 64 bits, as per the ACPI +2.0 specification. + +For backwards compatibility with ACPI 1.0, ACPI tables with a +revision number less than 2 use 32-bit integers only. + +Fixed a problem where the evaluation of OpRegion operands did not +always resolve them to numbers properly. + +------------------------------------------ +Summary of changes for this label: 10_20_00 + +Fix for CBN_._STA issue. This fix will allow correct access to +CBN_ OpRegions when the _STA returns 0x8. + +Support to convert ACPI constants (Ones, Zeros, One) to actual +values before a package object is returned + +Fix for method call as predicate to if/while construct causing +incorrect if/while behavior + +Fix for Else block package lengths sometimes calculated wrong (if +block > 63 bytes) + +Fix for Processor object length field, was always zero + +Table load abort if FACP sanity check fails + +Fix for problem with Scope(name) if name already exists + +Warning emitted if a named object referenced cannot be found +(resolved) during method execution. + + + + + +------------------------------------------ +Summary of changes for this label: 9_29_00 + +New table initialization interfaces: AcpiInitializeSubsystem no +longer has any parameters AcpiFindRootPointer - Find the RSDP (if +necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP- +>RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by +AcpiLoadTables + +Note: These interface changes require changes to all existing +OSDs + +The PCI_Config default address space handler is always installed +at the root namespace object. + +------------------------------------------- +Summary of changes for this label: 09_15_00 + +The new initialization architecture is implemented. New +interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize) +AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace + +(Namespace is automatically loaded when a table is loaded) + +The ACPI_OPERAND_OBJECT has been optimized to shrink its size +from +52 bytes to 32 bytes. There is usually one of these for every +namespace object, so the memory savings is significant. + +Implemented just-in-time evaluation of the CreateField operators. + +Bug fixes for IA-64 support have been integrated. + +Additional code review comments have been implemented + +The so-called "third pass parse" has been replaced by a final +walk +through the namespace to initialize all operation regions +(address +spaces) and fields that have not yet been initialized during the +execution of the various _INI and REG methods. + +New file - namespace/nsinit.c + +------------------------------------------- +Summary of changes for this label: 09_01_00 + +Namespace manager data structures have been reworked to change +the +primary object from a table to a single object. This has +resulted in dynamic memory savings of 3X within the namespace +and +2X overall in the ACPI CA subsystem. + +Fixed problem where the call to AcpiEvFindPciRootBuses was +inadvertently left commented out. + +Reduced the warning count when generating the source with the GCC +compiler. + +Revision numbers added to each module header showing the +SourceSafe version of the file. Please refer to this version +number when giving us feedback or comments on individual modules. + +The main object types within the subsystem have been renamed to +clarify their purpose: + +ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT +ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT +ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE + +NOTE: no changes to the initialization sequence are included in +this label. + +------------------------------------------- +Summary of changes for this label: 08_23_00 + +Fixed problem where TerminateControlMethod was being called +multiple times per method + +Fixed debugger problem where single stepping caused a semaphore +to +be oversignalled + +Improved performance through additional parse object caching - +added ACPI_EXTENDED_OP type + +------------------------------------------- +Summary of changes for this label: 08_10_00 + +Parser/Interpreter integration: Eliminated the creation of +complete parse trees for ACPI tables and control methods. +Instead, parse subtrees are created and then deleted as soon as +they are processed (Either entered into the namespace or +executed +by the interpreter). This reduces the use of dynamic kernel +memory significantly. (about 10X) + +Exception codes broken into classes and renumbered. Be sure to +recompile all code that includes acexcep.h. Hopefully we won't +have to renumber the codes again now that they are split into +classes (environment, programmer, AML code, ACPI table, and +internal). + +Fixed some additional alignment issues in the Resource Manager +subcomponent + +Implemented semaphore tracking in the AcpiExec utility, and fixed +several places where mutexes/semaphores were being unlocked +without a corresponding lock operation. There are no known +semaphore or mutex "leaks" at this time. + +Fixed the case where an ASL Return operator is used to return an +unnamed package. + +------------------------------------------- +Summary of changes for this label: 07_28_00 + +Fixed a problem with the way addresses were calculated in +AcpiAmlReadFieldData() and AcpiAmlWriteFieldData(). This problem +manifested itself when a Field was created with WordAccess or +DwordAccess, but the field unit defined within the Field was +less + +than a Word or Dword. + +Fixed a problem in AmlDumpOperands() module's loop to pull +operands off of the operand stack to display information. The +problem manifested itself as a TLB error on 64-bit systems when +accessing an operand stack with two or more operands. + +Fixed a problem with the PCI configuration space handlers where +context was getting confused between accesses. This required a +change to the generic address space handler and address space +setup definitions. Handlers now get both a global handler +context +(this is the one passed in by the user when executing +AcpiInstallAddressSpaceHandler() and a specific region context +that is unique to each region (For example, the _ADR, _SEG and +_BBN values associated with a specific region). The generic +function definitions have changed to the following: + +typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function, +UINT32 Address, UINT32 BitWidth, UINT32 *Value, void +*HandlerContext, // This used to be void *Context void +*RegionContext); // This is an additional parameter + +typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE +RegionHandle, UINT32 Function, void *HandlerContext, void +**RegionContext); // This used to be **ReturnContext + +------------------------------------------- +Summary of changes for this label: 07_21_00 + +Major file consolidation and rename. All files within the +interpreter have been renamed as well as most header files. +This +was done to prevent collisions with existing files in the host +OSs -- filenames such as "config.h" and "global.h" seem to be +quite common. The VC project files have been updated. All +makefiles will require modification. + +The parser/interpreter integration continues in Phase 5 with the +implementation of a complete 2-pass parse (the AML is parsed +twice) for each table; This avoids the construction of a huge +parse tree and therefore reduces the amount of dynamic memory +required by the subsystem. Greater use of the parse object cache +means that performance is unaffected. + +Many comments from the two code reviews have been rolled in. + +The 64-bit alignment support is complete. + +------------------------------------------- +Summary of changes for this label: 06_30_00 + +With a nod and a tip of the hat to the technology of yesteryear, +we've added support in the source code for 80 column output +devices. The code is now mostly constrained to 80 columns or +less to support environments and editors that 1) cannot display +or print more than 80 characters on a single line, and 2) cannot +disable line wrapping. + +A major restructuring of the namespace data structure has been +completed. The result is 1) cleaner and more +understandable/maintainable code, and 2) a significant reduction +in the dynamic memory requirement for each named ACPI object +(almost half). + +------------------------------------------- +Summary of changes for this label: 06_23_00 + +Linux support has been added. In order to obtain approval to get +the ACPI CA subsystem into the Linux kernel, we've had to make +quite a few changes to the base subsystem that will affect all +users (all the changes are generic and OS- independent). The +effects of these global changes have been somewhat far reaching. +Files have been merged and/or renamed and interfaces have been +renamed. The major changes are described below. + +Osd* interfaces renamed to AcpiOs* to eliminate namespace +pollution/confusion within our target kernels. All OSD +interfaces must be modified to match the new naming convention. + +Files merged across the subsystem. A number of the smaller +source +and header files have been merged to reduce the file count and +increase the density of the existing files. There are too many +to list here. In general, makefiles that call out individual +files will require rebuilding. + +Interpreter files renamed. All interpreter files now have the +prefix am* instead of ie* and is*. + +Header files renamed: The acapi.h file is now acpixf.h. The +acpiosd.h file is now acpiosxf.h. We are removing references to +the acronym "API" since it is somewhat windowsy. The new name is +"external interface" or xface or xf in the filenames.j + + +All manifest constants have been forced to upper case (some were +mixed case.) Also, the string "ACPI_" has been prepended to +many +(not all) of the constants, typedefs, and structs. + +The globals "DebugLevel" and "DebugLayer" have been renamed +"AcpiDbgLevel" and "AcpiDbgLayer" respectively. + +All other globals within the subsystem are now prefixed with +"AcpiGbl_" Internal procedures within the subsystem are now +prefixed with "Acpi" (with only a few exceptions). The original +two-letter abbreviation for the subcomponent remains after +"Acpi" +- for example, CmCallocate became AcpiCmCallocate. + +Added a source code translation/conversion utility. Used to +generate the Linux source code, it can be modified to generate +other types of source as well. Can also be used to cleanup +existing source by removing extraneous spaces and blank lines. +Found in tools/acpisrc/* + +OsdUnMapMemory was renamed to OsdUnmapMemory and then +AcpiOsUnmapMemory. (UnMap became Unmap). + +A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore. +When set to one, this indicates that the caller wants to use the + +semaphore as a mutex, not a counting semaphore. ACPI CA uses +both types. However, implementers of this call may want to use +different OS primitives depending on the type of semaphore +requested. For example, some operating systems provide separate + +"mutex" and "semaphore" interfaces - where the mutex interface +is +much faster because it doesn't have all the overhead of a full +semaphore implementation. + +Fixed a deadlock problem where a method that accesses the PCI +address space can block forever if it is the first access to the +space. + +------------------------------------------- +Summary of changes for this label: 06_02_00 + +Support for environments that cannot handle unaligned data +accesses (e.g. firmware and OS environments devoid of alignment +handler technology namely SAL/EFI and the IA-64 Linux kernel) +has +been added (via configurable macros) in these three areas: - +Transfer of data from the raw AML byte stream is done via byte +moves instead of word/dword/qword moves. - External objects +are +aligned within the user buffer, including package elements (sub- +objects). - Conversion of name strings to UINT32 Acpi Names is +now +done byte-wise. + +The Store operator was modified to mimic Microsoft's +implementation when storing to a Buffer Field. + +Added a check of the BM_STS bit before entering C3. + +The methods subdirectory has been obsoleted and removed. A new +file, cmeval.c subsumes the functionality. + +A 16-bit (DOS) version of AcpiExec has been developed. The +makefile is under the acpiexec directory. |
