HMAT_ENTRY structure (acpitabl.h)

The HMAT_ENTRY structure contains the Heterogeneous Memory Attribute Table (HMAT) information for the table. The structure can contain one of three HMAT types: Memory Subsystem Address Range (MSAR), System Locality Latency and Bandwidth Information (SLLBI), or Memory Side Cache Information (MSCI).

Syntax

typedef struct _HMAT_ENTRY {
  USHORT Type;
  USHORT Reserved;
  ULONG  Length;
  union {
    struct {
      union {
        struct {
          USHORT ProcessorProximityDomainValid : 1;
          USHORT Reserved0 : 1;
          USHORT Reserved1 : 1;
          USHORT Reserved : 13;
        } DUMMYSTRUCTNAME;
        USHORT AsUSHort;
      } Flags;
      USHORT    Reserved1;
      ULONG     ProcessorProximityDomain;
      ULONG     MemoryProximityDomain;
      ULONG     Reserved2;
      ULONGLONG Reserved3;
      ULONGLONG Reserved4;
    } Msar;
    struct {
      union {
        struct {
          UCHAR MemoryHierarchy : 4;
          UCHAR MinTransferSizeToAchieveValues : 1;
          UCHAR NonSequentialTransfers : 1;
          UCHAR Reserved : 2;
        } DUMMYSTRUCTNAME;
        UCHAR AsUChar;
      } Flags;
      UCHAR     DataType;
      UCHAR     MinTransferSize;
      UCHAR     Reserved1;
      ULONG     NumberOfInitiatorProximityDomains;
      ULONG     NumberOfTargetProximityDomains;
      ULONG     Reserved2;
      ULONGLONG EntryBaseUnit;
    } Sllbi;
    struct {
      ULONG     MemoryProximityDomain;
      ULONG     Reserved1;
      ULONGLONG MemorySideCacheSize;
      union {
        struct {
          ULONG TotalCacheLevels : 4;
          ULONG CacheLevel : 4;
          ULONG CacheAssociativity : 4;
          ULONG WritePolicy : 4;
          ULONG CacheLineSize : 16;
        } DUMMYSTRUCTNAME;
        ULONG AsULong;
      } CacheAttributes;
      USHORT    Reserved2;
      USHORT    NumberOfSmBiosHandles;
    } Msci;
  } DUMMYUNIONNAME;
} HMAT_ENTRY, *PHMAT_ENTRY;

Members

Type

A USHORT value containing the HMAT table type.

Reserved

Reserved for future use.

Length

A ULONG value containing the size of the table.

DUMMYUNIONNAME

Defines the DUMMYUNIONNAME union.

DUMMYUNIONNAME.Msar

Defines the Msar structure.

DUMMYUNIONNAME.Msar.Flags

Defines the Flags union.

DUMMYUNIONNAME.Msar.Flags.DUMMYSTRUCTNAME

Defines the DUMMYSTRUCTNAME structure.

DUMMYUNIONNAME.Msar.Flags.DUMMYSTRUCTNAME.ProcessorProximityDomainValid

Defines the USHORT member ProcessorProximityDomainValid.

DUMMYUNIONNAME.Msar.Flags.DUMMYSTRUCTNAME.Reserved0

Reserved for future use.

DUMMYUNIONNAME.Msar.Flags.DUMMYSTRUCTNAME.Reserved1

Reserved for future use.

DUMMYUNIONNAME.Msar.Flags.DUMMYSTRUCTNAME.Reserved

Reserved for future use.

DUMMYUNIONNAME.Msar.Flags.AsUSHort

Defines the USHORT member AsUSHort.

DUMMYUNIONNAME.Msar.Reserved1

Reserved for future use.

DUMMYUNIONNAME.Msar.ProcessorProximityDomain

Defines the ULONG member ProcessorProximityDomain.

DUMMYUNIONNAME.Msar.MemoryProximityDomain

Defines the ULONG member MemoryProximityDomain.

DUMMYUNIONNAME.Msar.Reserved2

Reserved for future use.

DUMMYUNIONNAME.Msar.Reserved3

Reserved for future use.

DUMMYUNIONNAME.Msar.Reserved4

Reserved for future use.

DUMMYUNIONNAME.Sllbi

Defines the Sllbi union.

DUMMYUNIONNAME.Sllbi.Flags

Defines the Flags union.

DUMMYUNIONNAME.Sllbi.Flags.DUMMYSTRUCTNAME

Defines the DUMMYSTRUCTNAME structure.

DUMMYUNIONNAME.Sllbi.Flags.DUMMYSTRUCTNAME.MemoryHierarchy

Defines the UCHAR member MemoryHierarchy.

DUMMYUNIONNAME.Sllbi.Flags.DUMMYSTRUCTNAME.MinTransferSizeToAchieveValues

Defines the UCHAR member MinTransferSizeToAchieveValues.

DUMMYUNIONNAME.Sllbi.Flags.DUMMYSTRUCTNAME.NonSequentialTransfers

Defines the UCHAR member NonSequentialTransfers.

DUMMYUNIONNAME.Sllbi.Flags.DUMMYSTRUCTNAME.Reserved

Reserved for future use.

DUMMYUNIONNAME.Sllbi.Flags.AsUChar

Defines the UCHAR member AsUChar.

DUMMYUNIONNAME.Sllbi.DataType

Defines the UCHAR member DataType.

DUMMYUNIONNAME.Sllbi.MinTransferSize

Defines the UCHAR member MinTransferSize.

DUMMYUNIONNAME.Sllbi.Reserved1

Reserved for future use.

DUMMYUNIONNAME.Sllbi.NumberOfInitiatorProximityDomains

Defines the ULONG member NumberOfInitiatorProximityDomains.

DUMMYUNIONNAME.Sllbi.NumberOfTargetProximityDomains

Defines the ULONG member NumberOfTargetProximityDomains.

DUMMYUNIONNAME.Sllbi.Reserved2

Reserved for future use.

DUMMYUNIONNAME.Sllbi.EntryBaseUnit

Defines the ULONGLONG member EntryBaseUnit.

DUMMYUNIONNAME.Msci

Defines the Msci union.

DUMMYUNIONNAME.Msci.MemoryProximityDomain

Defines the ULONG member MemoryProximityDomain.

DUMMYUNIONNAME.Msci.Reserved1

Reserved for future use.

DUMMYUNIONNAME.Msci.MemorySideCacheSize

Defines the ULONGLONG member MemorySideCacheSize.

DUMMYUNIONNAME.Msci.CacheAttributes

Defines the CacheAttributes union.

DUMMYUNIONNAME.Msci.CacheAttributes.DUMMYSTRUCTNAME

Defines the DUMMYSTRUCTNAME structure.

DUMMYUNIONNAME.Msci.CacheAttributes.DUMMYSTRUCTNAME.TotalCacheLevels

Defines the ULONG member TotalCacheLevels.

DUMMYUNIONNAME.Msci.CacheAttributes.DUMMYSTRUCTNAME.CacheLevel

Defines the ULONG member CacheLevel.

DUMMYUNIONNAME.Msci.CacheAttributes.DUMMYSTRUCTNAME.CacheAssociativity

Defines the ULONG member CacheAssociativity.

DUMMYUNIONNAME.Msci.CacheAttributes.DUMMYSTRUCTNAME.WritePolicy

Defines the ULONG member WritePolicy.

DUMMYUNIONNAME.Msci.CacheAttributes.DUMMYSTRUCTNAME.CacheLineSize

Defines the ULONG member CacheLineSize.

DUMMYUNIONNAME.Msci.CacheAttributes.AsULong

Defines the ULONG member AsULong.

DUMMYUNIONNAME.Msci.Reserved2

Reserved for future use.

DUMMYUNIONNAME.Msci.NumberOfSmBiosHandles

Defines the USHORT member NumberOfSmBiosHandles.

Requirements

Requirement	Value
Header	acpitabl.h