// 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:

// template\template_variant\specific\variant.cia

// 

//

#include <e32cia.h>

#include "variant.h"

#include "mconf.h"

/******************************************************************************

 * Interrupt handling/dispatch

 ******************************************************************************/

__NAKED__ void XIntDispatch(TAny*)

	{

	// Service second-level Variant Interrupts

	// Enter with r0->{Variant int controller base; Handlers;}

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

	asm("ldmia r0, {r3,r4} ");										// r3=Variant interrupt controller base, r4->handlers

	asm("0: ");

	asm("ldr r0, [r3, #%a0]" : : "i" ((TInt)KHoIntContEnable));		// r0=bitmask with enabled interrupts

	asm("ldr r1, [r3, #%a0]" : : "i" ((TInt)KHoIntContPending));	// r1=bitmask with pending interrupts

	asm("mov r2, #31 ");											// int id

	asm("and r0, r0, r1 ");

	asm("bics r0, r0, #0xf8000000 ");								// mask unused bits (only 26 2nd-level ints defined)

	asm("ldmeqfd sp!, {r4,pc} ");									// if no 2nd level interrupts pending, exit

	asm("cmp r0, #0x00010000 ");

	asm("movcc r0, r0, lsl #16 ");

	asm("subcc r2, r2, #16 ");

	asm("cmp r0, #0x01000000 ");

	asm("movcc r0, r0, lsl #8 ");

	asm("subcc r2, r2, #8 ");

	asm("cmp r0, #0x10000000 ");

	asm("movcc r0, r0, lsl #4 ");

	asm("subcc r2, r2, #4 ");

	asm("cmp r0, #0x40000000 ");

	asm("movcc r0, r0, lsl #2 ");

	asm("subcc r2, r2, #2 ");

	asm("cmp r0, #0x80000000 ");

	asm("subcc r2, r2, #1 ");										// r2=bit no. of MS 1

	asm("add r0, r4, r2, lsl #3 ");									// r0->handler for this interrupt

	asm("adr lr, 0b ");												// look again after calling handler

	asm("ldmia r0, {r0,pc} ");										// jump to handler

	}