EFI_ACPI_DMAR_RMRR_HEADER Struct Reference

Data Fields
EFI_ACPI_DMAR_STRUCTURE_HEADER	Header
UINT8	Reserved [2]
UINT16	SegmentNumber
UINT64	ReservedMemoryRegionBaseAddress
UINT64	ReservedMemoryRegionLimitAddress

Detailed Description

Reserved Memory Region Reporting Structure (RMRR) is described in section 8.4 Reserved memory ranges that may be DMA targets may be reported through the RMRR structures, along with the devices that requires access to the specified reserved memory region.

Field Documentation

EFI_ACPI_DMAR_STRUCTURE_HEADER EFI_ACPI_DMAR_RMRR_HEADER::Header

UINT8 EFI_ACPI_DMAR_RMRR_HEADER::Reserved[2]

UINT64 EFI_ACPI_DMAR_RMRR_HEADER::ReservedMemoryRegionBaseAddress

Base address of 4KB-aligned reserved memory region

UINT64 EFI_ACPI_DMAR_RMRR_HEADER::ReservedMemoryRegionLimitAddress

Last address of the reserved memory region. Value in this field must be greater than the value in Reserved Memory Region Base Address field. The reserved memory region size (Limit - Base + 1) must be an integer multiple of 4KB.

UINT16 EFI_ACPI_DMAR_RMRR_HEADER::SegmentNumber

PCI Segment Number associated with devices identified through the Device Scope field.