MdePkg/Library/BaseLib/Arm/DisableInterrupts.asm

   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     EXPORT DisableInterrupts
  12
  13     AREA Interrupt_disable, CODE, READONLY
  14
  15 ;/**
  16 ;  Disables CPU interrupts.
  17 ;
  18 ;**/
  19 ;VOID
  20 ;EFIAPI
  21 ;DisableInterrupts (
  22 ;  VOID
  23 ;  );
  24 ;
  25 DisableInterrupts
  26     MRS     R0,CPSR
  27     ORR     R0,R0,#0x80             ;Disable IRQ interrupts
  28     MSR     CPSR_c,R0
  29     BX      LR
  30
  31     END