MdePkg/Library/BaseLib/Arm/EnableInterrupts.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; EnableInterrupts() for ARM
   4 ;
   5 ; Copyright (c) 2006 - 2009, Intel Corporation<BR>
   6 ; Portions copyright (c) 2008-2009 Apple Inc. All rights reserved.<BR>
   7 ; All rights reserved. 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     EXPORT EnableInterrupts
  18
  19     AREA Interrupt_enable, CODE, READONLY
  20
  21 ;/**
  22 ;  Enables CPU interrupts.
  23 ;
  24 ;**/
  25 ;VOID
  26 ;EFIAPI
  27 ;EnableInterrupts (
  28 ;  VOID
  29 ;  );
  30 ;
  31 EnableInterrupts
  32     MRS     R0,CPSR
  33     BIC     R0,R0,#0x80             ;Enable IRQ interrupts
  34     MSR     CPSR_c,R0
  35     BX      LR
  36
  37     END