Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
19.6.145 WordIO (Word IO Resource Descriptor Macro) .......................................... 903
19.6.146 WordSpace (Word Space Resource Descriptor Macro) ) ........................... 904
19.6.147 XOr (Integer Bitwise Xor) ............................................................................ 906
19.6.148 Zero (Constant Zero Integer) ...................................................................... 906
20
ACPI Machine Language (AML) Specification ......................................... 907
20.1 Notation Conventions.................................................................................................. 907
20.2 AML Grammar Definition ............................................................................................ 908
20.2.1 Table and Table Header Encoding ................................................................. 908
20.2.2 Name Objects Encoding ................................................................................. 909
20.2.3 Data Objects Encoding ................................................................................... 910
20.2.4 Package Length Encoding .............................................................................. 910
20.2.5 Term Objects Encoding................................................................................... 911
20.2.6 Miscellaneous Objects Encoding .................................................................... 918
20.3 AML Byte Stream Byte Values.................................................................................... 919
20.4 AML Encoding of Names in the Namespace ............................................................. 925
21
ACPI Data Tables and Table Definition Language .................................. 927
21.1 Types of ACPI Data Tables ........................................................................................ 927
21.2 ACPI Table Definition Language Specification ........................................................... 927
21.2.1 Overview of the Table Definition Language (TDL) .......................................... 928
21.2.2 TDL Grammar Specification............................................................................ 929
21.2.3 Data Types...................................................................................................... 931
21.2.4 Fields Set Automatically by the Compiler........................................................ 933
21.2.5 Special Fields.................................................................................................. 934
21.2.6 TDL Generic Data Types ................................................................................ 934
21.2.7 Defining a Known ACPI Table in TDL ............................................................. 935
21.2.8 Defining an Unknown or New ACPI table in TDL............................................ 935
21.2.9 Table Definition Language Examples ............................................................. 936
21.2.10 Minimal ECDT Definition ............................................................................... 938
Appendix A
Device Class Specifications ...................................................................... 941
A.1 Overview...................................................................................................................... 941
A.2 Device Power States .................................................................................................... 941
A.2.1 Bus Power Management......................................................................... 942
A.2.2 Display Power Management ................................................................... 942
A.2.3 PCMCIA/PCCARD/CardBus Power Management................................... 942
A.2.4 PCI Power Management ........................................................................ 942
A.2.5 USB Power Management ........................................................................ 943
A.2.6 Device Classes ....................................................................................... 943
A.3 Default Device Class .................................................................................................... 944
A.3.1 Default Power Management Policy......................................................... 944
A.3.2 Default Wake Events .............................................................................. 944
A.3.3 Minimum Power Capabilities.................................................................... 944
A.4 Audio Device Class ...................................................................................................... 944
xxx April, 2015 Version 6.0