EFI_SMRAM_DESCRIPTOR Struct Reference


Data Fields

EFI_PHYSICAL_ADDRESS PhysicalStart
EFI_PHYSICAL_ADDRESS CpuStart
UINT64 PhysicalSize
UINT64 RegionState

Detailed Description

Structure describing a SMRAM region and its accessibility attributes.

Field Documentation

Designates the address of the SMRAM, as seen by software executing on the processors. This address may or may not match PhysicalStart.

Describes the number of bytes in the SMRAM region.

Designates the physical address of the SMRAM in memory. This view of memory is the same as seen by I/O-based agents, for example, but it may not be the address seen by the processors.

Describes the accessibility attributes of the SMRAM. These attributes include the hardware state (e.g., Open/Closed/Locked), capability (e.g., cacheable), logical allocation (e.g., allocated), and pre-use initialization (e.g., needs testing/ECC initialization).


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