// Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:

#include "TraceCoreRegisterWriter.h"

/**
 * InterrupsDisabled
 * Check if interrupts IRQ/FIQ disabled
 * Return 0x08 if only IRQ disabled, 0x04 if only FIQ disabled, 0x0C if both disabled.
 * @return true if interrupt(s) disabled, otherwise 0 (false)
 */
/*EXPORT_C*/ __NAKED__ TUint32 DTraceCoreRegisterWriter::InterruptsDisabled() 
    {
    // save work regs
    asm( "stmfd sp!, {r2, r4}" );
	
    // check if interrupts disabled
    asm( "mrs r2,cpsr" );
    asm( "and r0,r2,#0xc0" ); // 0b11000000 IRQ disabled bit 7, FIQ disabled bit 6
		
    // restore work regs
    asm( "ldmfd sp!,{r2,r4}" );
	
    // move pc,lr
    asm( "bx lr" );
    }