audk/MdePkg/Include/IndustryStandard/MemoryOverwriteRequestControlLock.h

/** @file
  Support for Microsoft Secure MOR implementation, defined at
  Microsoft Secure MOR implementation.
  https://msdn.microsoft.com/en-us/library/windows/hardware/mt270973(v=vs.85).aspx

  Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
  This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef __MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_H__
#define __MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_H__

#define MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_GUID \
  { \
    0xBB983CCF, 0x151D, 0x40E1, {0xA0, 0x7B, 0x4A, 0x17, 0xBE, 0x16, 0x82, 0x92} \
  }

#define MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_NAME L"MemoryOverwriteRequestControlLock"

//
// VendorGuid: {BB983CCF-151D-40E1-A07B-4A17BE168292}
// Name:       MemoryOverwriteRequestControlLock
// Attributes: NV+BS+RT
// GetVariable value in Data parameter: 0x0 (unlocked); 0x1 (locked without key); 0x2 (locked with key)
// SetVariable value in Data parameter: 0x0 (unlocked); 0x1 (locked);
//                                      Revision 2 additionally accepts an 8-byte value that represents a shared secret key.
//

//
// Note: Setting MemoryOverwriteRequestControlLock does not commit to flash (just changes the internal lock state).
// Getting the variable returns the internal state and never exposes the key.
//

extern EFI_GUID gEfiMemoryOverwriteRequestControlLockGuid;

#endif