Advanced Configuration and Power Interface Specification

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Power management timer control/status General-purpose event control/status Introduction SCI /SMI routing control/status for Power Management and General-purpose events (control required only if system supports legacy mode) System power state controls (sleeping/wake control) Processor power state control (for C1) Global Lock control/status (if Global Lock interfaces are required by the system) · ACPI-defined Generic Register Interfaces and object definitions in the ACPI Namespace: General-purpose event processing Motherboard device identification, configuration, and insertion/removal (Section 6) System power state control (Section 7.3) System indicators Devices and device controls: Processor Global Lock related interfaces when a logical register in the hardware is shared between OS and firmware environments · ACPI Event programming model ( Section 5.6) · ACPI-defined System BIOS Responsibilities (Section 15) · ACPI-defined State Definitions: Processor power states (All processors must support the C1 Power State) 1.7.2 OSPM Implementations OS enhancements are needed to support ACPI-defined features, concepts, and interfaces, along with their associated event models appropriate to the system platform class upon which the OS executes. This is the implementation of OSPM. The following outlines the OS enhancements and elements necessary to support all ACPI-defined interfaces. To support ACPI through the implementation of OSPM, the OS needs to be modified to: • Use system address map reporting interfaces. • Find and consume the ACPI System Description Tables. • Interpret ACPI machine language (AML). • Enumerate and configure motherboard devices described in the ACPI Namespace. • Interface with the power management timer. • Interface with the real-time clock wake alarm. • Enter ACPI mode (on legacy hardware systems). • Implement device power management policy. • Implement power resource management. • Implement processor power states in the scheduler idle handlers. • Control processor and device performance states. • Implement the ACPI thermal model. 10 Hewlett-Packard/Intel/Microsoft/Phoenix/Toshiba
Advanced Configuration and Power Interface Specification • Support the ACPI Event programming model including handling SCI interrupts, managing fixed events, general-purpose events, embedded controller interrupts, and dynamic device support. • Support acquisition and release of the Global Lock. • Use the reset register to reset the system. • Provide APIs to influence power management policy. • Implement driver support for ACPI-defined devices. • Implement APIs supporting the system indicators. • Support all system states S1–S5. 1.7.3 OS Requirements The following list describes the minimum requirements for an OSPM/ACPI-compatible OS: • Use system address map reporting interfaces to get the system address map on Intel Architecture (IA) platforms: • INT 15H, E820H - Query System Address Map interface (see Section 15,“System Address Map Interfaces”) • EFI GetMemoryMap() Boot Services Function (see Section 15, “System Address Map Interfaces”) • Find and consume the ACPI System Description Tables (see Section 5, “ACPI Software Programming Model”). • Implementation of an AML interpreter supporting all defined AML grammar elements (see Section 20, ACPI Machine Language Specification”). • Support for the ACPI Event programming model including handling SCI interrupts, managing fixed events, general-purpose events, embedded controller interrupts, and dynamic device support. • Enumerate and configure motherboard devices described in the ACPI Namespace. • Implement support for the following ACPI devices defined within this specification: • Embedded Controller Device (see Section 12, “ACPI Embedded Controller Interface Specification”) • GPE Block Device (see Section 9.10, “GPE Block Device”) • Module Device (see Section 9.11, “Module Device”) • Implementation of the ACPI thermal model (see Section 11, “Thermal Management”). • Support acquisition and release of the Global Lock. • OS-directed power management support (device drivers are responsible for maintaining device context as described by the Device Power Management Class Specifications described in Section A). 1.8 Target Audience This specification is intended for the following users: • OEMs building hardware containing ACPI-compatible interfaces Hewlett-Packard/Intel/Microsoft/Phoenix/Toshiba 11
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FACP - Flag Bit Length Advanced Con
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Field X Firmware Waking Vector Adva
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5.2.20.5.1 Sequence of Operations:
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Table 5-81 MPST Table Structure 5.2
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MEMORY_POWER _STATUS_REGIST ER Adva
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Table 5-87 Flag format Advanced Con
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Table 5-93 Socket Structure Advance
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Root R \_PR P \PID0 \_SB d CPU0 _ST
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Hex value Description Advanced Conf
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Arguments: (1) Advanced Configurati
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5.7.5 _DLM (DeviceLock Mutex) Advan
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Return Value: None Advanced Configu
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6.1.2 _CID (Compatible ID) Advanced
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Device(BUS0) { } Advanced Configura
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Example: Advanced Configuration and
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6.2.10.1 Rules for Evaluating _OSC
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Scope(\_SB.PCI0) { Advanced Configu
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Return Value: None Argument Informa
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Status Code Description 0xA0-0xFFFF
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Arguments: None Return Value: Advan
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Offset Field Name Advanced Configur
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6.4.2.7 Fixed DMA Descriptor Advanc
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Byte 3 Interrupt Vector Flags Advan
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Byte 11 Byte 12 Byte 13 Byte 14 Adv
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6.5.7 _GLK (Global Lock) Advanced C
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7.1.3 _ON Advanced Configuration an
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Object Description Advanced Configu
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Arguments: None Return Value: None
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7.2.17 _S2D (S2 Device State) Advan
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7.3.1 \_BFS (Back From Sleep) Advan
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8.4 Declaring Processors Advanced C
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} Advanced Configuration and Power
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Example Advanced Configuration and
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8.4.3.5 _TDL (T-state Depth Limit)
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Element Object Type Counter Wraparo
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8.4.5.1.2.1 Maximum Performance Reg
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} }) Advanced Configuration and Pow
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8.5.2 OSPM _OST Evaluation Advanced
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9.2.1 Overview Advanced Configurati
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Return Value: Advanced Configuratio
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} } } }) Advanced Configuration and
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9.12.4 Example: Memory Device Scope
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Arguments: (0) Return Value: Advanc
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Host Interface Advanced Configurati
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10.2.1 Battery Events Advanced Conf
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10.2.2.9 _BCT (Battery Charge Time)
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1 - On-line Advanced Configuration
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Object Description Advanced Configu
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11.1.5 Passive Cooling Advanced Con
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11.2 Cooling Preferences Advanced C
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} Advanced Configuration and Power
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Status Code All other error codes a
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Where: Advanced Configuration and P
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Data Returned: 12.9.2.3 Send Byte D
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Data Returned: 12.9.2.9 Write Block
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12.10 SMBus Devices Advanced Config
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13.1.3 SMBus Status Codes Advanced
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16.1 Sleeping States Advanced Confi
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Result // Target� ) => Integer Ad
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) Advanced Configuration and Power
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Result // Target� ) => Advanced
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Arguments Advanced Configuration an
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Name (CNT, 5) Store (CNT, Local0) A
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DefSleep := SleepOp MsecTime SleepO
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Encoding Value Advanced Configurati
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Encoding Value Advanced Configurati
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\ S0 S1 MEM MEM CPU SET GET SET GET
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Primary Desktop Secondary Desktop T
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Symbols _EJx 301 A AC adapter devic
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primary terms 678 reserved object n
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Case (Conditional Execution) 728 ca
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D1 Device State definition 27 trans
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EFI definition 19 GetMemoryMap inte
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definition 20 events 20 registers 2
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hung systems 75, 76 hysteresis 522
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LNotEqual (Logical Not Equal) 769 L
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Notification Temperature Threshold
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implementation requirements 10 pass
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performance states 43 performance v
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estoring system context 619 results
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commands, restricted 580 data buffe
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throttling 387, 400 THT_EN 90 Timer
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