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- /** @file
- Definition of GUIDed HOB for reserving SMRAM regions.
- This file defines:
- * the GUID used to identify the GUID HOB for reserving SMRAM regions.
- * the data structure of SMRAM descriptor to describe SMRAM candidate regions
- * values of state of SMRAM candidate regions
- * the GUID specific data structure of HOB for reserving SMRAM regions.
- This GUIDed HOB can be used to convey the existence of the T-SEG reservation and H-SEG usage
- Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- @par Revision Reference:
- GUIDs defined in SmmCis spec version 0.9.
- **/
- #ifndef _EFI_SMM_PEI_SMRAM_MEMORY_RESERVE_H_
- #define _EFI_SMM_PEI_SMRAM_MEMORY_RESERVE_H_
- #define EFI_SMM_PEI_SMRAM_MEMORY_RESERVE \
- { \
- 0x6dadf1d1, 0xd4cc, 0x4910, {0xbb, 0x6e, 0x82, 0xb1, 0xfd, 0x80, 0xff, 0x3d } \
- }
- /**
- * GUID specific data structure of HOB for reserving SMRAM regions.
- *
- * Inconsistent with specification here:
- * EFI_HOB_SMRAM_DESCRIPTOR_BLOCK has been changed to EFI_SMRAM_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 SMRAM.
- ///
- /// Inconsistent with specification here:
- /// In Framework SMM 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 NumberOfSmmReservedRegions;
- ///
- /// Used throughout this protocol to describe the candidate
- /// regions for SMRAM that are supported by this platform.
- ///
- EFI_SMRAM_DESCRIPTOR Descriptor[1];
- } EFI_SMRAM_HOB_DESCRIPTOR_BLOCK;
- extern EFI_GUID gEfiSmmPeiSmramMemoryReserveGuid;
- #endif
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