MdePkg/Library/BaseLib/Arm/CpuPause.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; CpuPause() for ARM
   4 ;
   5 ; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
   6 ; Portions copyright (c) 2008 - 2009, Apple Inc. 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   EXPORT CpuPause
  18   AREA cpu_pause, CODE, READONLY
  19
  20 ;/**
  21 ;  Requests CPU to pause for a short period of time.
  22 ;
  23 ;  Requests CPU to pause for a short period of time. Typically used in MP
  24 ;  systems to prevent memory starvation while waiting for a spin lock.
  25 ;
  26 ;**/
  27 ;VOID
  28 ;EFIAPI
  29 ;CpuPause (
  30 ;  VOID
  31 ;  );
  32 ;
  33 CpuPause
  34     NOP
  35     NOP
  36     NOP
  37     NOP
  38     NOP
  39     BX LR
  40
  41   END