MdePkg/Library/BaseCpuLib/AArch64/CpuSleep.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # CpuSleep() for AArch64
   4 #
   5 # Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
   6 # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   7 # Portions copyright (c) 2011 - 2013, ARM LTD. All rights reserved.<BR>
   8 # This program and the accompanying materials
   9 # are licensed and made available under the terms and conditions of the BSD License
  10 # which accompanies this distribution.  The full text of the license may be found at
  11 # http://opensource.org/licenses/bsd-license.php.
  12 #
  13 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15 #
  16 #------------------------------------------------------------------------------
  17
  18 .text
  19 .align 3
  20 GCC_ASM_EXPORT(CpuSleep)
  21
  22 #/**
  23 #  Places the CPU in a sleep state until an interrupt is received.
  24 #
  25 #  Places the CPU in a sleep state until an interrupt is received. If interrupts
  26 #  are disabled prior to calling this function, then the CPU will be placed in a
  27 #  sleep state indefinitely.
  28 #
  29 #**/
  30 #VOID
  31 #EFIAPI
  32 #CpuSleep (
  33 #  VOID
  34 #  );
  35 #
  36
  37 ASM_PFX(CpuSleep):
  38     wfi
  39     ret