MdePkg/Library/BaseLib/Arm/DisableInterrupts.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # DisableInterrupts() 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 .text
  12 .p2align 2
  13 GCC_ASM_EXPORT(DisableInterrupts)
  14
  15 #/**
  16 #  Disables CPU interrupts.
  17 #
  18 #**/
  19 #VOID
  20 #EFIAPI
  21 #DisableInterrupts (
  22 #  VOID
  23 #  );
  24 #
  25 ASM_PFX(DisableInterrupts):
  26     mrs  R0,CPSR
  27     orr  R0,R0,#0x80    @Disable IRQ interrupts
  28     msr  CPSR_c,R0
  29     bx   LR