MdePkg/Library/BaseLib/AArch64/MemoryFence.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; MemoryFence() for AArch64
   4 ;
   5 ; Copyright (c) 2013, ARM Ltd. All rights reserved.
   6 ;
   7 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   8 ;
   9 ;------------------------------------------------------------------------------
  10
  11   EXPORT MemoryFence
  12   AREA BaseLib_LowLevel, CODE, READONLY
  13
  14 ;/**
  15 ;  Used to serialize load and store operations.
  16 ;
  17 ;  All loads and stores that proceed calls to this function are guaranteed to be
  18 ;  globally visible when this function returns.
  19 ;
  20 ;**/
  21 ;VOID
  22 ;EFIAPI
  23 ;MemoryFence (
  24 ;  VOID
  25 ;  );
  26 ;
  27 MemoryFence
  28     // System wide Data Memory Barrier.
  29     dmb sy
  30     ret
  31
  32   END