/*
* 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
	}