MdePkg/Include/IndustryStandard/MemoryOverwriteRequestControlLock.h

   1 /** @file
   2   Support for Microsoft Secure MOR implementation, defined at
   3   Microsoft Secure MOR implementation.
   4   https://msdn.microsoft.com/en-us/library/windows/hardware/mt270973(v=vs.85).aspx
   5
   6   Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
   7   This program and the accompanying materials
   8   are licensed and made available under the terms and conditions of the BSD License
   9   which accompanies this distribution.  The full text of the license may be found at
  10   http://opensource.org/licenses/bsd-license.php
  11
  12   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  13   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14
  15 **/
  16
  17 #ifndef __MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_H__
  18 #define __MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_H__
  19
  20 #define MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_GUID \
  21   { \
  22     0xBB983CCF, 0x151D, 0x40E1, {0xA0, 0x7B, 0x4A, 0x17, 0xBE, 0x16, 0x82, 0x92} \
  23   }
  24
  25 #define MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_NAME L"MemoryOverwriteRequestControlLock"
  26
  27 //
  28 // VendorGuid: {BB983CCF-151D-40E1-A07B-4A17BE168292}
  29 // Name:       MemoryOverwriteRequestControlLock
  30 // Attributes: NV+BS+RT
  31 // Size:       0x1 byte
  32 //
  33 // The BIOS initializes MemoryOverwriteRequestControlLock to a value of 0x00
  34 // before BDS (BOOT#### processing). When the OS loader calls SetVariable by
  35 // specifying 0x01, the access mode for both MemoryOverwriteRequestControlLock
  36 // and MemoryOverwriteRequestControl is changed to read-only. If any other
  37 // value is specified in the SetVariable call, it fails with the
  38 // EFI_INVALID_PARAMETER error code.
  39 //
  40
  41 extern EFI_GUID gEfiMemoryOverwriteRequestControlLockGuid;
  42
  43 #endif