MdePkg/Library/BaseLib/X64/Lfence.nasm

   1 ;------------------------------------------------------------------------------ ;
   2 ; Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
   3 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   4 ;
   5 ; Module Name:
   6 ;
   7 ;   Lfence.nasm
   8 ;
   9 ; Abstract:
  10 ;
  11 ;   Performs a serializing operation on all load-from-memory instructions that
  12 ;   were issued prior to the call of this function.
  13 ;
  14 ; Notes:
  15 ;
  16 ;------------------------------------------------------------------------------
  17
  18     DEFAULT REL
  19     SECTION .text
  20
  21 ;------------------------------------------------------------------------------
  22 ; VOID
  23 ; EFIAPI
  24 ; AsmLfence (
  25 ;   VOID
  26 ;   );
  27 ;------------------------------------------------------------------------------
  28 global ASM_PFX(AsmLfence)
  29 ASM_PFX(AsmLfence):
  30     lfence
  31     ret