Advanced Configuration and Power Interface Specification

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ACPI Source Language (ASL)Reference Description If the mutex object is owned by the current invocation, ownership for the Mutex is released once. It is fatal to release ownership on a Mutex unless it is currently owned. A Mutex must be totally released before an invocation completes. 19.5.108 Reset (Reset an Event Synchronization Object) Syntax Reset (SyncObject) Arguments SynchObject must be an Event synchronization object. Description This operator is used to reset an event synchronization object to a non-signaled state. See also the Wait and Signal function operator definitions. 19.5.109 ResourceTemplate (Resource To Buffer Conversion Macro) Syntax ResourceTemplate () {ResourceMacroList} => Buffer Description For a full definition of the ResourceTemplateTerm macro, see Section 19.2.3, “ASL Resource Templates”. 19.5.110 Return (Return from Method Execution) Syntax Return Return () Return (Arg) Arguments Arg is optional and can be any valid object or reference. Description Returns control to the invoking control method, optionally returning a copy of the object named in Arg. If no Arg object is specified, a Return(Zero) is generated by the ASL compiler. 794 Hewlett-Packard/Intel/Microsoft/Phoenix/Toshiba
Advanced Configuration and Power Interface Specification Note: In the absence of an explicit Return () statement, the return value to the caller is undefined. 19.5.111 Revision (Constant Revision Integer) Syntax Revision => Integer Description The Revision operator returns an Integer containing the current revision of the AML interpreter. Writes to this object are not allowed. 19.5.112 Scope (Open Named Scope) Syntax Scope (Location) {ObjectList} Arguments Opens and assigns a base namespace scope to a collection of objects. All object names defined within the scope are created relative to Location. Note that Location does not have to be below the surrounding scope, but can refer to any location within the namespace. The Scope term itself does not create objects, but only locates objects within the namespace; the actual objects are created by other ASL terms. Description The object referred to by Location must already exist in the namespace and be one of the following object types that has a namespace scope associated with it: • A predefined scope such as: \ (root), \_SB, \GPE, \_PR, \_TZ, etc. • Device • Processor • Thermal Zone • Power Resource The Scope term alters the current namespace location to the existing Location. This causes the defined objects within ObjectList to be created relative to this new location in the namespace. Note: When creating secondary SSDTs, it is often required to use the Scope operator to change the namespace location in order create objects within some part of the namespace that has been defined by the main DSDT. Use the External operator to declare the scope location so that the ASL compiler will not issue an error for an undefined Location. Examples The following example ASL code uses the Scope operator and creates several objects: Hewlett-Packard/Intel/Microsoft/Phoenix/Toshiba 795
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1.9.2 Programming Models Advanced C
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Field Byte Length Advanced Configur
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FACP - Flag Bit Length Advanced Con
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Field X Firmware Waking Vector Adva
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Field Byte Length Parking Protocol
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5.2.16.2 Memory Affinity Structure
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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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External(\_SB.CPU1, DeviceObj) Adva
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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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OperationRegion (� RegionName, //
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16.1 Sleeping States Advanced Confi
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Result // Target� ) => Integer Ad
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) DebugTerm :=� Debug Advanced Co
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) Advanced Configuration and Power
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Result // Target� ) => Advanced
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Transfer8 | Transfer16 | Transfer8_
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To convert from an object of this D
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Arguments Advanced Configuration an
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State Status Definition Advanced Co
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Primary Desktop Secondary Desktop T
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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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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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Advanced Configuration and Power Interface Specification

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