diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/Arm/GetInterruptsState.S')
-rw-r--r-- | MdePkg/Library/BaseLib/Arm/GetInterruptsState.S | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Arm/GetInterruptsState.S b/MdePkg/Library/BaseLib/Arm/GetInterruptsState.S new file mode 100644 index 0000000000..4103aaaf9b --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/GetInterruptsState.S @@ -0,0 +1,43 @@ +#------------------------------------------------------------------------------ +# +# GetInterruptState() function for ARM +# +# Copyright (c) 2006 - 2009, Intel Corporation<BR> +# Portions copyright (c) 2008-2009 Apple Inc.<BR> +# All rights reserved. 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. +# +#------------------------------------------------------------------------------ + +.text +.p2align 2 +.globl _GetInterruptState + +#/** +# 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 |