MdeModulePkg/Universal/Variable/RuntimeDxe/LoadFenceSmm.c

   1 /** @file
   2   Serialize operation on all load-from-memory instructions (SMM version).
   3
   4 Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
   5 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <Library/BaseLib.h>
  16 #include "Variable.h"
  17
  18 /**
  19   This service is consumed by the variable modules to perform a serializing
  20   operation on all load-from-memory instructions that were issued prior to the
  21   call of this function.
  22
  23 **/
  24 VOID
  25 MemoryLoadFence (
  26   VOID
  27   )
  28 {
  29   AsmLfence ();
  30 }