Advanced Configuration and Power Interface Specification

ACPI Software Programming Model
Flags 2 4 Bit [0] – set to 1 to indicate that this is a top level aggregator
device. This device must be counted in the number of top level
aggregator devices in PMTT table and must be surfaces via
PMTT.
Bit [0] – Set to 0 to indicate that this is not a top level aggregator
device.
Bit [1] - set to 1 to indicate physical element of the topology.
Set to 0 to indicate logical element of topology
Bit [2] and [3] –
• If 00, indicates that all components aggregated by this device
implements volatile memory
• If 01, indicates that components aggregated by this device
implements both volatile and non-volatile memory
• If 10, indicates that all components aggregated by this
device implements non-volatile memory
• 11 - Reserved
Bits [15:4] Reserved, must be zero
Reserved 2 6 Reserved, must be zero.
Type Specific Data __ 8 Type specific data. Interpretation of this data is specific to the
type of the memory aggregator device. See Table 5-100,
Table 5-101, and Table 5-102.
Table 5-100 Socket Structure
Field
Byte
Length
Byte
Offset
Description
Type 1 0 0 – Socket
Reserved 1 1 Reserved, must be zero.
Length 2 2 Length in bytes for this Structure. The length implies the number
of memory controller structures at the end of this structure.
Flags 2 4 Bit [0] – set to 1 to indicate that this is a top level aggregator
device.
Bit [1] – set to 1 since socket is a physical element of the
topology
Bit [2] and [3] –
• If 00, indicates that all components aggregated by this device
implements volatile memory
• If 01, indicates that components aggregated by this device
implements both volatile and non-volatile memory
• If 10, indicates that all components aggregated by this
device implements non-volatile memory
• 11 - Reserved
Bit [4] – Bit [15] Reserved, must be zero
Reserved 2 6 Reserved, must be zero.
Socket Identifier 2 8 Uniquely identifies the socket in the system.
Reserved 2 10 Reserved, must be zero.
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