Add ARM support

Add C inline assembly files for IA32 and X64 GCC builds.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9113 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/BaseLib/Arm/GetInterruptsState.asm

@@ -0,0 +1,45 @@
+;------------------------------------------------------------------------------ 
+;
+; 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.
+;
+;------------------------------------------------------------------------------
+
+    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