MdePkg/Library/BaseLib/AArch64/DisableInterrupts.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # DisableInterrupts() 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 .p2align 2
  20 GCC_ASM_EXPORT(DisableInterrupts)
  21
  22 .set DAIF_WR_IRQ_BIT,   (1 << 1)
  23
  24 #/**
  25 #  Disables CPU interrupts.
  26 #
  27 #**/
  28 #VOID
  29 #EFIAPI
  30 #DisableInterrupts (
  31 #  VOID
  32 #  );
  33 #
  34 ASM_PFX(DisableInterrupts):
  35    msr  daifset, #DAIF_WR_IRQ_BIT
  36    ret