Advanced Configuration and Power Interface …

1 Advanced Configuration and Power Interface specification Hewlett-Packard Corporation Intel Corporation Microsoft Corporation Phoenix Technologies Ltd. Toshiba Corporation Revision October 10, 2006 ii Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Hewlett-Packard Corporation, Intel Corporation, Microsoft Corporation, Phoenix Technologies Ltd., Toshiba Corporation All rights reserved. INTELLECTUAL PROPERTY DISCLAIMER THIS specification IS PROVIDED AS IS WITH NO WARRANTIES WHATSOEVER INCLUDING ANY WARRANTY OF MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL, specification , OR SAMPLE.

2 NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED OR INTENDED HEREBY. HP, INTEL, MICROSOFT, PHOENIX, AND TOSHIBA DISCLAIM ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF PROPRIETARY RIGHTS, RELATING TO IMPLEMENTATION OF INFORMATION IN THIS specification . HP, INTEL, MICROSOFT, PHOENIX, AND TOSHIBA DO NOT WARRANT OR REPRESENT THAT SUCH IMPLEMENTATION(S) WILL NOT INFRINGE SUCH RIGHTS. Microsoft, Win32, Windows, and Windows NT are registered trademarks of Microsoft Corporation. All other product names are trademarks, registered trademarks, or service marks of their respective owners.

3 Hewlett-Packard/Intel/Microsoft/Phoenix/ Toshiba iii Affected Revision Change Description Sections Table 5-6 changes. Added BERT, DMAR, ERST, HEST, IBFT, UEFI, & WAET Table signatures, corrected BOOTand TCPA table urls. Oct. 2006 Added PCIe ASPM Controls to Boot Architecture Flags Table 5-11 5., Clarified DSDT loading. Clarified SSDTs are ALL loaded during init. Added a section describing guidelines for the ordering of processors in the MADT to support proper boot processor and multi-threaded logical processor operation. Clarified _STA object description. Clarified _INI object description.

4 Clarified _CST entry type field is 1,2, or 3 only. , Clarified _PTC ASL definition, Corrected _PTC ASL examples Clarified _PCT ASL definition. Added section describing PCI Bus and Segment Group Numbers under Module Devices Corrected LoadTable invocation in thermal zone with multiple devices example. Corrected RegisterTerm definition to include optional DescriptorName field. Corrected Buffer declaration example. Corrected DMA Resource Descriptor Macro Descriptor Name description. Corrected DWORD IO Resource Descriptor Macro Descriptor Name description. Corrected DWORD Memory Resource Descriptor Macro Descriptor Name description.

5 Corrected DWORD Space Resource Descriptor Macro Descriptor Name description. Corrected Extended IO Resource Descriptor Macro Descriptor Name description. Corrected Extended Memory Resource Descriptor Macro Descriptor Name description. Corrected Extended Space Resource Descriptor Macro Descriptor Name description. Clarified External object ReturnType and ParamterTypes. Clarified Function object ParamterTypes. Clarified IndexField object operation. Corrected IO Resource Descriptor Macro Descriptor Name description. Corrected Interrupt Resource Descriptor Macro Descriptor Name description.

6 Corrected IRQNoFlags Interrupt Resource Descriptor Macro Descriptor Name description. Clarified LoadTable is not used to load tables with SSDT signature. Hewlett-Packard/Intel/Microsoft/Phoenix/ Toshiba iv Affected Revision Change Description Sections Clarified Match Object SearchPackage argument and description. Corrected Memory24 Memory Resource Descriptor Macro Descriptor Name description. Corrected AddressAlignment field bits. Corrected Memory32 Memory Resource Descriptor Macro Descriptor Name description. Corrected Memory32 Fixed Memory Resource Descriptor Macro Descriptor Name description.

7 Clarified Method object ParamterTypes. Corrected QwordIO Resource Descriptor Macro Descriptor Name description. Corrected Qword Memory Resource Descriptor Macro Descriptor Name description. Corrected QwordSpace Resource Descriptor Macro Descriptor Name description. Added Descriptor Name argument description to Register Resource Descriptor Macro definition. Corrected VendorLong Resource Descriptor Macro Descriptor Name description. Corrected VendorShort Resource Descriptor Macro Descriptor Name description. Clarified Wait object TimeoutValue range. Corrected WordBusNumber Resource Descriptor Macro Descriptor Name description.

8 Corrected WordIO Resource Descriptor Macro Descriptor Name description. Corrected WordSpace Resource Descriptor Macro Descriptor Name description. Dec. 2005 Errata corrected and clarifications added. Table 5-6 HPET web link, added WSPT and WDAT, updated WDRT description and web link Clarified that the endian-ness of data value encodings in externally defined data tables is specified by the external data table specifications Added MSI_Not_Supported bit to IA-PC Boot Architecture Flags Table 5-11 Corrected X_Firmware_Waking_Vector description in Table 5-12 _ADR object encoding for USB Ports clarified as 1-n in Table 6-2 Updated and clarified _HPX object description and setting record types Clarified Resource Data Type descriptions readability / usability Clarified Small Resource Data Type description - Tables

9 6-21, 6-22 Corrected IRQ Descriptior ASL macro reference Corrected description text of General Flags field for _MAF and _MIF bits in Address Space Descriptors Updated _PDC ASL example invoking _OSC and accompanying description Corrected processor Throttling State (T-state) control Interface definitions Hewlett-Packard/Intel/Microsoft/Phoenix/ Toshiba v Affected Revision Change Description Sections Clarified OSPM processing of _TPC notifies on platforms supporting P-states Clarified _PSS entry Power field is maximum Power consumed in the P-state Clarified _CRS encoding of registers for the GPE Block device Corrected OpCode definitions for DerefOfTerm and IndexTerm Added ProcessorObj to ObjectTypeKeyword Clarified Data Type Conversion Rules in Table 17-8 Clarified creation of zero bit-length field using CreateField causes fatal exception

10 Clarified DMA Resource Descriptor Macro DmaChannelList description Function object ParameterTypes description corrected. Fixed StringObj type in example Clarified Interrupt Resource Descriptor Macros InterruptList description ,57,58 Corrected Interrupt Resource Descriptor Macro description Corrected Package declaration Clarified Return object ASL syntax providing implicit zero return argument when no parenthesis follow the Return statement ToBuffer - Clarified string null terminator is copied Clarified ASL Resource Macros - ResourceSourceIndex and ResourceSource argument requirements and ASL compiler behavior ,32,33,55,94,95,96,131,132.