1 /*

     2 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  

    15 * naviengine_assp\interrupts.cia

    16 *

    17 */

    18 

    19 

    20 

    21 #include <naviengine_priv.h>

    22 

    23 #ifndef __SMP__

    24 __NAKED__ void NaviEngineInterrupt::IrqDispatch()

    25 	{

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

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

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

    29 

    30 

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

    32 

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

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

    35 

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

    37     asm("beq IRQ_End");				

    38 

    39     // Call handler

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

    41 	asm("adr lr, IRQ_End");

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

    43     

    44 	// End of Interrupt

    45 	asm("IRQ_End:");

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

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

    48 

    49 	asm("__KHwBaseIntIf:");

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

    51 	asm("__Handlers: ");

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

    53 	asm("__KHmIntMask:");

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

    55 	}

    56 #endif

    57 

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

    59 __NAKED__ void NaviEngineInterrupt::FiqDispatch()

    60 	{

    61 	asm("mov r0, #0");

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

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

    64 	}