Advanced Configuration and Power Interface Specification

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Advanced Configuration and Power Interface Specification types of notifications, see Section 5.6.6, “Device Object Notifications”). Notice that a device check notification from the \_SB node will cause OSPM to re-enumerate the entire tree 1 . Hardware is not obligated to track the state needed to supply the resulting status; however, this method must return status concerning the last sleep operation initiated by OSPM. The return values can be used to provide additional information to OSPM or user. Arguments: (1) Arg0 – An Integer containing the value of the sleeping state (1 for S1, 2 for S2, etc.) Return Value: A Package containing two Integers containing status and the power supply S-state Return Value Information _WAK returns a package with the following format: Element 0 – An Integer containing a bitfield that represents conditions that occurred during sleep. 0x00000000 – Wake was signaled and was successful 0x00000001 – Wake was signaled but failed due to lack of power 0x00000002 – Wake was signaled but failed due to thermal condition Other values – Reserved Element 1 – An Integer containing the power supply S-state. If non-zero, this is the effective S-state the power supply that was actually entered. This value is used to detect when the targeted S-state was not entered because of too much current being drawn from the power supply. For example, this might occur when some active device’s current consumption pushes the system’s power requirements over the low power supply mark, thus preventing the deeper system sleeping state from being entered as desired. 7.5 OSPM usage of _PTS, _TTS, and _WAK OSPM will invoke _PTS, _TTS,and _WAK in the following order: 1. OSPM decides (through a policy scheme) to place the system into a sleeping state 2. _TTS(Sx) is run, where Sx is the desired sleep state to enter 3. OSPM notifies all native device drivers of the sleep state transition 4. _PTS is run 5. OSPM readies system for the sleep state transition 6. OSPM writes the sleep vector and the system enters the specified Sx sleep state 7. System Wakes up 8. OSPM readies system for the return from the sleep state transition 1. Only buses that support hardware-defined enumeration methods are done automatically at run-time. This would include ACPI-enumerated devices. 416 April, 2015 Version 6.0
Power and Performance Management 9. _WAK is run 10. OSPM notifies all native device drivers of the return from the sleep state transition 11. _TTS(0) is run to indicate the return to the S0 state Working State Working State _TTS () _TTS() __PTS() __WAK() Sleeping State Sleeping State Figure 7-39 Working / Sleeping State object evaluation flow Version 6.0 417
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Advanced Configuration and Power In
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Revision History Revision Change De
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Contents 1 2 Introduction........
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5 ACPI Software Programming Model
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7 6.3.6 _RMV (Remove) ............
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9.2.5 _ALR (Ambient Light Response)
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11.2.1 Evaluating Thermal Device Li
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14.1.3 Generic Communications Subsp
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19.6.10 Buffer (Declare Buffer Obje
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19.6.102 Processor (Declare Process
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A.4.1 Power State Definitions......
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Tables Table 1-1 Hardware Type vs.
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Table 5-91 Power state Values .....
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Table 6-184 Device Insertion, Remov
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Table 10-275 Control Method Battery
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Table 19-367 Field Unit list entire
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Figures Figure 1-1 OSPM/ACPI Global
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Introduction 1 Introduction The Adv
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Introduction wake and answer the te
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Introduction Figure 1-1 OSPM/ACPI G
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Introduction specified below are ge
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Introduction ACPI System Descriptio
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Introduction • Support the ACPI E
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Introduction 1.9.2 Programming Mode
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Introduction 1.10 Related Documents
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Definition of Terms 2 Definition of
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Definition of Terms of power manage
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Definition of Terms I/O SAPIC An In
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Definition of Terms loaded. This al
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Definition of Terms varies on the w
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Definition of Terms in shallower po
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Definition of Terms state to allow
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ACPI Overview 3 ACPI Overview Platf
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ACPI Overview component to avoid da
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ACPI Overview Aspects of mobile PC
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ACPI Overview the SCI status bit ma
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ACPI Overview Each device enumerate
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ACPI Overview necessary. Figure 3-8
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ACPI Overview Low Power S0 Idle Cap
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ACPI Hardware Specification 4 ACPI
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Device Configuration 6 Device Confi
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Device Configuration BUS PCMCIA PC
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Device Configuration Device(SATA) /
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Device Configuration Return Value I
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Device Configuration unable to dete
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Device Configuration 6.2.5 _DSD (De
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Device Configuration } Name (_DSD,
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Device Configuration APIC Device”
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Device Configuration Scope(\_SB) {
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Device Configuration Method(_EJ0, 1
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Device Configuration Field Object T
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Device Configuration Field Object T
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Device Configuration other governin
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Device Configuration Since platform
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Device Configuration Section 8.4.4.
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Device Configuration Control Field
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Device Configuration Device(PCI0) /
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Device Configuration Field Type Des
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Device Configuration This optional
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Device Configuration Field Byte Len
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Device Configuration If a device in
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Device Configuration are present, w
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Device Configuration Arguments: Non
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Device Configuration Return Value:
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Device Configuration Table 6-187 Op
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Device Configuration User interacts
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Device Configuration Method(_EJ0, 1
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Device Configuration 6.4.2 Small Re
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Device Configuration Offset Field N
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Device Configuration Table 6-197 I/
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Device Configuration 6.4.2.9 End Ta
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Device Configuration Offset Byte 11
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Thermal Management 11 Thermal Manag
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Thermal Management When a thermal z
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Thermal Management controller firmw
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Thermal Management 11.1.5 Passive C
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Thermal Management 11.2 Cooling Pre
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Thermal Management Alternatively, d
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Thermal Management 11.3.1.2 _FPS (F
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Thermal Management Package (){ Revi
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Thermal Management 11.4.2 _ALx (Act
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Thermal Management Element Object T
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Thermal Management Return Value: No
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Thermal Management Other Temperatur
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Thermal Management // // NOTE3: Thi
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Thermal Management 11.4.16 _TFP (Th
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Thermal Management 11.4.20 _TSN (Th
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Thermal Management occurs—relievi
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Thermal Management Scope(\_SB) { De
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Thermal Management } // fan cooling
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Thermal Management // For brevity,
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Thermal Management External(\_SB.CP
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Thermal Management Method(_TPT, 1)
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Platform Communications Channel (PC
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System Address Map Interfaces 15 Sy
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System Address Map Interfaces EAX F
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System Address Map Interfaces 15.3
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System Address Map Interfaces Base
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Waking and Sleeping 16 Waking and S
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Waking and Sleeping 16.1 Sleeping S
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Waking and Sleeping synchronized wi
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Waking and Sleeping 3. Removing pow
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Waking and Sleeping The _TTS contro
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Waking and Sleeping on what the har
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Waking and Sleeping CLI instruction
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Waking and Sleeping For this exampl
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Waking and Sleeping If an NVS image
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Platforms Non-Uniform Memory Access
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Platforms Non-Uniform Memory Access
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Appendix A Device Class Specificati
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• PCI Bus Power Management Capabi
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A.4.1 Power State Definitions State
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A.5.1 Power State Definitions State
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power transitions and power managem
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State Status Definition D2 N/A This
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the next boot, a 1 indicates a PCI
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Bits Definition 31 0 - Don’t do a
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Power Resource statements 391 prima
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centenary value, RTC alarm 83 Centr
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power resource objects 398 D2 Devic
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Eject Device List (_EDL) object 332
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features 68 functional implementati
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I/O resource flag 366 I/O SAPIC def
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logic fixed power button 77 lid swi
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objects _ BMC (Battery Maintenance
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transitioning working to soft-off s
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power resources battery management
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definition 22 table fields 115 RTC_
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protocols 650, 662, 669 Read/Write
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top of memory 704 ToString (Convert
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Advanced Configuration and Power Interface Specification

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