/*

* Copyright (c) 2008-2009 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:  

* naviengine_assp\interrupts.cia

*

*/

#include <naviengine_priv.h>

#ifndef __SMP__

__NAKED__ void NaviEngineInterrupt::IrqDispatch()

	{

	asm("stmfd sp!, {r4,r5,lr}");

	asm("ldr r4, __KHwBaseIntIf");							// Base address of Interrupt interface

	asm("ldr r12, __Handlers");								// Base address of interrupt handlers

 	asm("ldr r5, [r4, #%a0]" : : "i" ((TInt)KHoCIIIntAck));	// Acknowledge the interrupt

	asm("ldr lr, __KHmIntMask");							// Interrupt mask in end-of-interrupt register

    asm("and r5, r5, lr");									// r5 = interruptID

    asm("cmp r5, lr");										// Spurious interrupt has ID 1023

    asm("beq IRQ_End");				

    // Call handler

	asm("add r12, r12, r5, lsl #3");

	asm("adr lr, IRQ_End");

	asm("ldmia r12, {r0, pc}");       						// Call interrupt handler. This will alse clear interrupt cause.

	// End of Interrupt

	asm("IRQ_End:");

	asm("str r5, [r4, #%a0]" : : "i" ((TInt)KHoCIIEndOfInt));

	asm("ldmfd sp!, {r4,r5,pc}");          						// No more pending, so finish

	asm("__KHwBaseIntIf:");

	asm(".word %a0" : : "i" ((TInt)KHwBaseIntIf));

	asm("__Handlers: ");

	asm(".word %a0" : : "i" ((TInt)&NaviEngineInterrupt::Handlers[0]));

	asm("__KHmIntMask:");

	asm(".word %a0" : : "i" ((TInt)1023));

	}

#endif

//FIQ is not used, so this should never be called.

__NAKED__ void NaviEngineInterrupt::FiqDispatch()

	{

	asm("mov r0, #0");

	asm("sub r0, r0, #1"); 	//	r0 = -1

	asm("str r0, [r0]"); 	//	Generate exception

	}