MdePkg/Library/BaseLib/Arm/EnableInterrupts.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # EnableInterrupts() 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(EnableInterrupts)
  14
  15
  16 #/**
  17 #  Enables CPU interrupts.
  18 #
  19 #**/
  20 #VOID
  21 #EFIAPI
  22 #EnableInterrupts (
  23 #  VOID
  24 #  );
  25 #
  26 ASM_PFX(EnableInterrupts):
  27     mrs  R0,CPSR
  28     bic  R0,R0,#0x80    @Enable IRQ interrupts
  29     msr  CPSR_c,R0
  30     bx   LR