2 This is a special GUID extension Hob to describe SMRAM memory regions.
5 * the GUID used to identify the GUID HOB for reserving SMRAM regions.
6 * the data structure of SMRAM descriptor to describe SMRAM candidate regions
7 * values of state of SMRAM candidate regions
8 * the GUID specific data structure of HOB for reserving SMRAM regions.
10 Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
11 SPDX-License-Identifier: BSD-2-Clause-Patent
13 @par Revision Reference:
14 GUIDs defined in PI SPEC version 1.5.
18 #ifndef _SMRAM_MEMORY_RESERVE_H_
19 #define _SMRAM_MEMORY_RESERVE_H_
21 #define EFI_SMM_SMRAM_MEMORY_GUID \
23 0x6dadf1d1, 0xd4cc, 0x4910, {0xbb, 0x6e, 0x82, 0xb1, 0xfd, 0x80, 0xff, 0x3d } \
27 * The GUID extension hob is to describe SMRAM memory regions supported by the platform.
31 /// Designates the number of possible regions in the system
32 /// that can be usable for SMRAM.
34 UINT32 NumberOfSmmReservedRegions
;
36 /// Used throughout this protocol to describe the candidate
37 /// regions for SMRAM that are supported by this platform.
39 EFI_SMRAM_DESCRIPTOR Descriptor
[1];
40 } EFI_SMRAM_HOB_DESCRIPTOR_BLOCK
;
42 extern EFI_GUID gEfiSmmSmramMemoryGuid
;