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58 lines
2.2 KiB
C
58 lines
2.2 KiB
C
/** @file
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Variable Lock Protocol is related to EDK II-specific implementation of variables
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and intended for use as a means to mark a variable read-only after the event
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EFI_END_OF_DXE_EVENT_GUID is signaled.
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Copyright (c) 2013 - 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 __VARIABLE_LOCK_H__
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#define __VARIABLE_LOCK_H__
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#define EDKII_VARIABLE_LOCK_PROTOCOL_GUID \
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{ \
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0xcd3d0a05, 0x9e24, 0x437c, { 0xa8, 0x91, 0x1e, 0xe0, 0x53, 0xdb, 0x76, 0x38 } \
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}
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typedef struct _EDKII_VARIABLE_LOCK_PROTOCOL EDKII_VARIABLE_LOCK_PROTOCOL;
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/**
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Mark a variable that will become read-only after leaving the DXE phase of execution.
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Write request coming from SMM environment through EFI_SMM_VARIABLE_PROTOCOL is allowed.
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@param[in] This The EDKII_VARIABLE_LOCK_PROTOCOL instance.
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@param[in] VariableName A pointer to the variable name that will be made read-only subsequently.
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@param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently.
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@retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked
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as pending to be read-only.
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@retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL.
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Or VariableName is an empty string.
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@retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has
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already been signaled.
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@retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request.
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**/
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typedef
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EFI_STATUS
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(EFIAPI * EDKII_VARIABLE_LOCK_PROTOCOL_REQUEST_TO_LOCK) (
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IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid
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);
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///
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/// Variable Lock Protocol is related to EDK II-specific implementation of variables
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/// and intended for use as a means to mark a variable read-only after the event
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/// EFI_END_OF_DXE_EVENT_GUID is signaled.
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///
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struct _EDKII_VARIABLE_LOCK_PROTOCOL {
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EDKII_VARIABLE_LOCK_PROTOCOL_REQUEST_TO_LOCK RequestToLock;
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};
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extern EFI_GUID gEdkiiVariableLockProtocolGuid;
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#endif
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