// 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
	}