MdePkg/Library/BaseLib/Arm/GetInterruptsState.asm

;------------------------------------------------------------------------------ 
;
; GetInterruptState() function for ARM
;
; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
; This program and the accompanying materials
; are licensed and made available under the terms and conditions of the BSD License
; which accompanies this distribution.  The full text of the license may be found at
; http://opensource.org/licenses/bsd-license.php.
;
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
;
;------------------------------------------------------------------------------

    EXPORT GetInterruptState

    AREA Interrupt_enable, CODE, READONLY

;/**
;  Retrieves the current CPU interrupt state.
;
;  Returns TRUE is interrupts are currently enabled. Otherwise
;  returns FALSE.
;
;  @retval TRUE  CPU interrupts are enabled.
;  @retval FALSE CPU interrupts are disabled.
;
;**/
;
;BOOLEAN
;EFIAPI
;GetInterruptState (
;  VOID
; );
;
GetInterruptState
    MRS     R0, CPSR
    TST     R0, #0x80                ;Check if IRQ is enabled.
    MOVEQ   R0, #1
    MOVNE   R0, #0
    BX      LR
    
    END