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 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   8 ;
   9 ;------------------------------------------------------------------------------
  10
  11   EXPORT CpuPause
  12   AREA cpu_pause, CODE, READONLY
  13
  14 ;/**
  15 ;  Requests CPU to pause for a short period of time.
  16 ;
  17 ;  Requests CPU to pause for a short period of time. Typically used in MP
  18 ;  systems to prevent memory starvation while waiting for a spin lock.
  19 ;
  20 ;**/
  21 ;VOID
  22 ;EFIAPI
  23 ;CpuPause (
  24 ;  VOID
  25 ;  );
  26 ;
  27 CpuPause
  28     NOP
  29     NOP
  30     NOP
  31     NOP
  32     NOP
  33     BX LR
  34
  35   END