Advanced Configuration and Power Interface Specification

ACPI Software Programming Model
OEMID 6 10 OEM ID.
OEM Table ID 8 16 For the System Resource Affinity Table, the table ID is the
manufacturer model ID.
OEM Revision 4 24 OEM revision of System Resource Affinity Table for supplied OEM
Table ID.
Creator ID 4 28 Vendor ID of utility that created the table.
Creator Revision 4 32 Revision of utility that created the table.
Reserved 4 36 Reserved to be 1 for backward compatibility
Reserved 8 40 Reserved
Static Resource
Allocation
Structure[n]
--- 48 A list of static resource allocation structures for the platform. See
Section 5.2.16.1,”Processor Local APIC/SAPIC Affinity Structure”,
Section 5.2.16.2 “Memory Affinity Structure”, Section 5.2.16.3
“Processor Local x2APIC Affinity Structure”, and Section 5.2.16.4,
“GICC Affinity Structure.
5.2.16.1 Processor Local APIC/SAPIC Affinity Structure
The Processor Local APIC/SAPIC Affinity structure provides the association between the APIC ID
or SAPIC ID/EID of a processor and the proximity domain to which the processor belongs. Table 5-
71 provides the details of the Processor Local APIC/SAPIC Affinity structure.
Table 5-71 Processor Local APIC/SAPIC Affinity Structure
Field
Byte
Length
Byte
Offset
Description
Type 1 0 0 Processor Local APIC/SAPIC Affinity Structure
Length 1 1 16
Proximity Domain 1 2 Bit [7:0] of the proximity domain to which the processor belongs.
[7:0]
APIC ID 1 3 The processor local APIC ID.
Flags 4 4 Flags – Processor Local APIC/SAPIC Affinity Structure. See
Table 5-56 for a description of this field.
Local SAPIC EID 1 8 The processor local SAPIC EID.
Proximity Domain 3 9 Bit [31:8] of the proximity domain to which the processor belongs.
[31:8]
Clock Domain 4 12 The clock domain to which the processor belongs. See
Section 6.2.1, “_CDM (Clock Domain)”.
Table 5-72 Flags – Processor Local APIC/SAPIC Affinity Structure
Field
Bit
Length
Bit
Offset
Description
Enabled 1 0 If clear, the OSPM ignores the contents of the Processor Local
APIC/SAPIC Affinity Structure. This allows system firmware to
populate the SRAT with a static number of structures but only
enable them as necessary.
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