// Copyright (c) 1994-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "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:

// e32\nkern\arm\ncmonitor.cia

// Kernel crash debugger - NKERN ARM specific portion

// 

//

#include <e32cia.h>

#include <kernel/monitor.h>

#include "nk_priv.h"

#include <arm.h>

#ifdef __CPU_HAS_MMU

#define __USE_CP15_FAULT_INFO__

#endif

EXPORT_C __NAKED__ void Monitor::HandleException()

//

// Handle an exception while the monitor is running

//

	{

	asm("mov r3, r1 ");				// exception type

	asm("ldr r0, [sp, #24] ");		// code address

#ifdef __USE_CP15_FAULT_INFO__

#ifdef __CPU_ARM_HAS_SPLIT_FSR

	asm("cmp r1, #%a0 " : : "i" ((TInt)EArmExceptionPrefetchAbort));

	asm("mrceq p15, 0, r2, c5, c0, 1");		// r2=instruction fault status

	asm("mrcne p15, 0, r2, c5, c0, 0");		// r2=data fault status

#ifdef __CPU_ARM_HAS_CP15_IFAR

	asm("mrceq p15, 0, r1, c6, c0, 2");		// r1= IFAR fault address

	asm("mrcne p15, 0, r1, c6, c0, 0");		// r1= DFAR fault address

#else 

	asm("mrc p15, 0, r1, c6, c0");			// r1= FAR fault address

#endif // __CPU_ARM_HAS_CP15_IFAR

#else

	asm("mrc p15, 0, r1, c6, c0");			// r1=fault address

	asm("mrc p15, 0, r2, c5, c0");			// r2=fault status

#endif // __CPU_ARM_HAS_SPLIT_FSR

#endif // __USE_CP15_FAULT_INFO__

	asm("add sp, sp, #28 ");		// restore mode_abt/mode_und stack balance

	asm("mov r12, #0xd1 ");			// back into mode_fiq

	asm("msr cpsr, r12 ");

	asm("ldr r12, __TheMonitorPtr ");

	asm("ldr r12, [r12] ");

	asm("add r12, r12, #%a0" : : "i" _FOFF(Monitor,iExceptionInfo));

	asm("stmia r12, {r0-r3} ");		// store exc info

	asm("mov r0, #%a0" : : "i" ((TInt)KErrAbort));

	asm("b " CSM_ZN7Monitor5LeaveEi );

	asm("__TheMonitorPtr: ");

	asm(".word TheMonitorPtr ");

	}