24 July 2014. Summary of changes for version 20140724:
This release is available at https://acpica.org/downloads
The ACPI 5.1 specification has been released and is available at: http://uefi.org/specs/access
0) ACPI 5.1 support in ACPICA:
ACPI 5.1 is fully supported in ACPICA as of this release.
New predefined names. Support includes iASL and runtime ACPICA validation.
_CCA (Cache Coherency Attribute).
_DSD (Device-Specific Data). David Box.
Modifications to existing ACPI tables. Support includes headers, iASL Data Table compiler, disassembler, and the template generator.
FADT - New fields and flags. Graeme Gregory.
GTDT - One new subtable and new fields. Tomasz Nowicki.
MADT - Two new subtables. Tomasz Nowicki.
PCCT - One new subtable.
New notification type for System Resource Affinity change events.
1) ACPICA kernel-resident subsystem:
Fixed a regression introduced in 20140627 where a fault can happen during the deletion of Alias AML namespace objects. The problem affected both the core ACPICA and the ACPICA tools including iASL and AcpiExec.
Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a simple mechanism to enable wake GPEs that have no associated handler or control method. Rafael Wysocki.
Updated the AcpiEnableGpe interface to disallow the enable if there is no handler or control method associated with the particular GPE. This will help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
Updated GPE handling and dispatch by disabling the GPE before clearing the status bit for edge-triggered GPEs. Lv Zheng.
Added Timer() support to the AML Debug object. The current timer value is now displayed with each invocation of (Store to) the debug object to enable simple generation of execution times for AML code (method execution for example.) ACPICA BZ 1093.
Example Code and Data Size: These are the sizes for the OS-independent acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code includes the debug output trace mechanism and has a much larger code and data size.
Non-Debug Version: 98.7K Code, 27.3K Data, 126.0K Total
Debug Version: 192.0K Code, 79.7K Data, 271.7K Total
Non-Debug Version: 98.7K Code, 27.2K Data, 125.9K Total
Debug Version: 191.7K Code, 79.6K Data, 271.3K Total
2) iASL Compiler/Disassembler and Tools:
Fixed an issue with the recently added local printf implementation, concerning width/precision specifiers that could cause incorrect output. Lv Zheng. ACPICA BZ 1094.
Disassembler: Added support to detect buffers that contain UUIDs and disassemble them to an invocation of the ToUUID operator. Also emit commented descriptions of known ACPI-related UUIDs.
AcpiHelp: Added support to display known ACPI-related UUIDs. New option, -u. Adds three new files.
iASL: Update table compiler and disassembler for DMAR table changes that were introduced in September 2013. With assistance by David Woodhouse.