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39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/** @file
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EFI SMM Access2 Protocol as defined in the PI 1.2 specification.
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This protocol is used to control the visibility of the SMRAM on the platform.
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It abstracts the location and characteristics of SMRAM. The expectation is
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that the north bridge or memory controller would publish this protocol.
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The principal functionality found in the memory controller includes the following:
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- Exposing the SMRAM to all non-SMM agents, or the "open" state
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- Shrouding the SMRAM to all but the SMM agents, or the "closed" state
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- Preserving the system integrity, or "locking" the SMRAM, such that the settings cannot be
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perturbed by either boot service or runtime agents
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Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _SMM_ACCESS2_H_
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#define _SMM_ACCESS2_H_
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#include <Protocol/MmAccess.h>
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#define EFI_SMM_ACCESS2_PROTOCOL_GUID EFI_MM_ACCESS_PROTOCOL_GUID
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typedef EFI_MM_ACCESS_PROTOCOL EFI_SMM_ACCESS2_PROTOCOL;
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typedef EFI_MM_OPEN EFI_SMM_OPEN2;
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typedef EFI_MM_CLOSE EFI_SMM_CLOSE2;
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typedef EFI_MM_LOCK EFI_SMM_LOCK2;
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typedef EFI_MM_CAPABILITIES EFI_SMM_CAPABILITIES2;
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extern EFI_GUID gEfiSmmAccess2ProtocolGuid;
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#endif
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