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-rw-r--r--MdePkg/Library/BaseLib/Arm/GetInterruptsState.S43
1 files changed, 43 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Arm/GetInterruptsState.S b/MdePkg/Library/BaseLib/Arm/GetInterruptsState.S
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+#------------------------------------------------------------------------------
+#
+# 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