---------------------------------------- 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 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 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.