Advanced Configuration and Power Interface Specification

ACPI Software Programming Model
The following GUIDs are used to describe the Address Range Types currently defined in this
specification. Additional GUIDs can be generated to describe additional Address Range Types.
This GUID defines a volatile memory region:
{ 0x7305944F, 0xFDDA, 0x44E3, 0xB1, 0x6C, 0x3F, 0x22, 0xD2, 0x52, 0xE5, 0xD0 }
This GUID defines a Byte Addressable Persistent Memory (PM) Region:
{ 0x66F0D379, 0xB4F3, 0x4074, 0xAC, 0x43, 0x0D, 0x33, 0x18, 0xB7, 0x8C, 0xDB }
This GUID defines a NVDIMM Control Region:
{ 0x92F701F6, 0x13B4, 0x405D, 0x91, 0x0B, 0x29, 0x93, 0x67, 0xE8, 0x23, 0x4C }
This GUID defines a NVDIMM Block Data Window Region:
{ 0x91AF0530, 0x5D86, 0x470E, 0xA6, 0xB0, 0x0A, 0x2D, 0xB9, 0x40, 0x82, 0x49 }
This GUID defines a RAM Disk supporting a Virtual Disk Region – Volatile (a volatile memory
region that contains a raw disk format):
{ 0x77AB535A,0x45FC,0x624B,0x55,0x60,0xF7,0xB2,0x81,0xD1,0xF9,0x6E }
This GUID defines a RAM Disk supporting a Virtual CD Region – Volatile (a volatile memory
region that contains an ISO image):
{ 0x3D5ABD30,0x4175,0x87CE,0x6D,0x64,0xD2,0xAD,0xE5,0x23,0xC4,0xBB }
This GUID defines a RAM Disk supporting a Virtual Disk Region – Persistent (a persistent memory
region that contains a raw disk format):
{ 0x5CEA02C9,0x4D07,0x69D3,0x26,0x9F,0x44,0x96,0xFB,0xE0,0x96,0xF9 }
This GUID defines a RAM Disk supporting a Virtual CD Region – Persistent (a persistent memory
region that contains an ISO image):
{ 0x08018188,0x42CD,0xBB48,0x10,0x0F,0x53,0x87,0xD5,0x3D,0xED,0x3D }
Note: The Address Range Type GUID values used in the ACPI NFIT must match the corresponding
values in the Disk Type GUID of the RAM Disk device path that describe the same RAM Disk
Type. Refer to the UEFI specification for details.
5.2.25.2 Memory Device to System Physical Address Range Mapping Structure
Table 5-129 Memory Device to System Physical Address Range Mapping Structure
Field
Byte
Length
Byte
Offset
Description
Type 2 0 1 - Memory Device to System Physical Address Range
Structure
Length 2 2 Length in bytes for entire structure.
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