Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
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3.4.2 Setting Device Power States............................................................................... 39
3.4.3 Getting Device Power Status .............................................................................. 40
3.4.4 Waking the Computer ......................................................................................... 40
3.4.5 Example: Modem Device Power Management ................................................... 41
3.5 Processor Power Management....................................................................................... 44
3.6 Device and Processor Performance States .................................................................... 44
3.7 Configuration and “Plug and Play” .................................................................................. 44
3.7.1 Device Configuration Example: Configuring the Modem .................................... 45
3.7.2 NUMA Nodes ...................................................................................................... 45
3.8 System Events ................................................................................................................ 45
3.9 Battery Management....................................................................................................... 46
3.9.1 Battery Communications ..................................................................................... 46
3.9.2 Battery Capacity.................................................................................................. 47
3.9.3 Battery Gas Gauge ............................................................................................. 47
3.9.4 Low Battery Levels.............................................................................................. 48
3.9.5 Battery Calibration............................................................................................... 49
3.10 Thermal Management................................................................................................... 50
3.10.1 Active and Passive Cooling Modes................................................................... 51
3.10.2 Performance vs. Energy Conservation ............................................................. 52
3.10.3 Acoustics (Noise) .............................................................................................. 52
3.10.4 Multiple Thermal Zones..................................................................................... 52
3.11 Flexible Platform Architecture Support ......................................................................... 52
3.11.1 Hardware-reduced ACPI ................................................................................... 53
3.11.2 Low-Power Idle ................................................................................................. 53
3.11.3 Connection Resources...................................................................................... 54
ACPI Hardware Specification ...................................................................... 57
4.1 Hardware-Reduced ACPI ............................................................................................... 57
4.1.1 Hardware-Reduced Events ................................................................................. 58
4.2 Fixed Hardware Programming Model ............................................................................. 58
4.3 Generic Hardware Programming Model ......................................................................... 59
4.4 Diagram Legends............................................................................................................ 61
4.5 Register Bit Notation .......................................................................................................61
4.6 The ACPI Hardware Model ............................................................................................ 62
4.6.1 Hardware Reserved Bits ..................................................................................... 67
4.6.2 Hardware Ignored Bits ........................................................................................ 67
4.6.3 Hardware Write-Only Bits.................................................................................... 67
4.6.4 Cross Device Dependencies............................................................................... 67
4.7 ACPI Hardware Features................................................................................................ 68
4.8 ACPI Register Model ...................................................................................................... 69
4.8.1 ACPI Register Summary ..................................................................................... 72
4.8.2 Fixed Hardware Features.................................................................................... 75
4.8.3 Fixed Hardware Registers................................................................................... 85
4.8.4 Generic Hardware Registers............................................................................... 93
xvi April, 2015 Version 6.0