MdePkg/Library/BaseLib/Arm/DisableInterrupts.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # DisableInterrupts() for ARM
   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 # 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 .text
  18 .p2align 2
  19 .globl ASM_PFX(DisableInterrupts)
  20 INTERWORK_FUNC(DisableInterrupts)
  21
  22 #/**
  23 #  Disables CPU interrupts.
  24 #
  25 #**/
  26 #VOID
  27 #EFIAPI
  28 #DisableInterrupts (
  29 #  VOID
  30 #  );
  31 #
  32 ASM_PFX(DisableInterrupts):
  33     mrs  R0,CPSR
  34     orr  R0,R0,#0x80    @Disable IRQ interrupts
  35     msr  CPSR_c,R0
  36     bx   LR