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/** @file
Definition of GUIDed HOB for reserving MMRAM regions.
This file defines:
* the GUID used to identify the GUID HOB for reserving MMRAM regions.
* the data structure of MMRAM descriptor to describe MMRAM candidate regions
* values of state of MMRAM candidate regions
* the GUID specific data structure of HOB for reserving MMRAM regions.
This GUIDed HOB can be used to convey the existence of the T-SEG reservation and H-SEG usage
Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Revision Reference:
GUIDs defined in MmCis spec version 0.9.
**/
#ifndef _EFI_MM_PEI_MMRAM_MEMORY_RESERVE_H_
#define _EFI_MM_PEI_MMRAM_MEMORY_RESERVE_H_
#define EFI_MM_PEI_MMRAM_MEMORY_RESERVE \
{ \
0x0703f912, 0xbf8d, 0x4e2a, {0xbe, 0x07, 0xab, 0x27, 0x25, 0x25, 0xc5, 0x92 } \
}
/**
* GUID specific data structure of HOB for reserving MMRAM regions.
*
* Inconsistent with specification here:
* EFI_HOB_MMRAM_DESCRIPTOR_BLOCK has been changed to EFI_MMRAM_HOB_DESCRIPTOR_BLOCK.
* This inconsistency is kept in code in order for backward compatibility.
**/
typedef struct {
///
/// Designates the number of possible regions in the system
/// that can be usable for MMRAM.
///
/// Inconsistent with specification here:
/// In Framework MM CIS 0.91 specification, it defines the field type as UINTN.
/// However, HOBs are supposed to be CPU neutral, so UINT32 should be used instead.
///
UINT32 NumberOfMmReservedRegions;
///
/// Used throughout this protocol to describe the candidate
/// regions for MMRAM that are supported by this platform.
///
EFI_MMRAM_DESCRIPTOR Descriptor[1];
} EFI_MMRAM_HOB_DESCRIPTOR_BLOCK;
extern EFI_GUID gEfiMmPeiSmramMemoryReserveGuid;
#endif
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