Advanced Configuration and Power Interface Specification

FACP - Flag Bit
Length
FORCE_
APIC_CLUSTER_MOD
EL
FORCE_APIC_PHYSIC
AL_DESTINATION_MO
DE
5.2.9.1 Preferred PM Profile System Types
ACPI Software Programming Model
The following descriptions of preferred power management profile system types are to be used as a
guide for setting the Preferred_PM_Profile field in the FADT. OSPM can use this field to set default
power management policy parameters during OS installation.
Desktop
Mobile
1 18 A one indicates that all local APICs must be configured for the
cluster destination model when delivering interrupts in logical
mode.
If this bit is set, then logical mode interrupt delivery operation
may be undefined until OSPM has moved all local APICs to
the cluster model.
Note that the cluster destination model doesn’t apply to
Itanium Processor Family (IPF) local SAPICs. This bit is
intended for xAPIC based machines that require the cluster
destination model even when 8 or fewer local APICs are
present in the machine.
1 19 A one indicates that all local xAPICs must be configured for
physical destination mode. If this bit is set, interrupt delivery
operation in logical destination mode is undefined. On
machines that contain fewer than 8 local xAPICs or that do
not use the xAPIC architecture, this bit is ignored.
HW_REDUCED_ACPI 1 20 A one indicates that the ACPI Hardware Interface (chapter 4)
is not implemented. Software-only alternatives are used for
supported fixed-features defined in chapter 4.
LOW_POWER_S0_IDL
E_CAPABLE
Reserved 10 22
Bit
Offset
Description
1 21 A one informs OSPM that the platform is able to achieve
power savings in S0 similar to or better than those typically
achieved in S3. In effect, when this bit is set it indicates that
the system will achieve no power benefit by making a sleep
transition to S3.
A single user, full featured, stationary computing device that resides on or near an
individual’s work area. Most often contains one processor. Must be connected to AC
power to function. This device is used to perform work that is considered mainstream
corporate or home computing (for example, word processing, Internet browsing,
spreadsheets, and so on).
A single-user, full-featured, portable computing device that is capable of running on
batteries or other power storage devices to perform its normal functions. Most often
contains one processor. This device performs the same task set as a desktop. However
it may have limitations dues to its size, thermal requirements, and/or power source
life.
124 Hewlett-Packard/Intel/Microsoft/Phoenix/Toshiba