MdePkg/Library/BaseLib/X64/Lfence.nasm

   1 ;------------------------------------------------------------------------------ ;
   2 ; Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
   3 ; This program and the accompanying materials
   4 ; are licensed and made available under the terms and conditions of the BSD License
   5 ; which accompanies this distribution.  The full text of the license may be found at
   6 ; http://opensource.org/licenses/bsd-license.php.
   7 ;
   8 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   9 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  10 ;
  11 ; Module Name:
  12 ;
  13 ;   Lfence.nasm
  14 ;
  15 ; Abstract:
  16 ;
  17 ;   Performs a serializing operation on all load-from-memory instructions that
  18 ;   were issued prior to the call of this function.
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     DEFAULT REL
  25     SECTION .text
  26
  27 ;------------------------------------------------------------------------------
  28 ; VOID
  29 ; EFIAPI
  30 ; AsmLfence (
  31 ;   VOID
  32 ;   );
  33 ;------------------------------------------------------------------------------
  34 global ASM_PFX(AsmLfence)
  35 ASM_PFX(AsmLfence):
  36     lfence
  37     ret