// 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:

// e32\memmodel\epoc\multiple\x86\xmonitor.cpp

// Kernel crash debugger - ARM specific portion

// 

//

#include <kernel/monitor.h>

#include <x86_mem.h>

void SetPageDir(DMemModelProcess* aProcess);

void Monitor::CpuInit()

	{

	}

void Monitor::DumpCpuProcessData(DProcess* aProcess)

	{

	}

void Monitor::DumpCpuChunkData(DChunk* aChunk)

	{

	}

// From xmmu.cpp:

const TUint32 KPdePteAccessed=0x20;

const TUint32 KPdePteDirty=0x40;

// Mask to ignore accessed and dirty bits

const TUint32 KPdeEqualMask=~(KPdePteAccessed|KPdePteDirty);

TBool PdesEqual(const TPde* aLeft, const TPde* aRight, TLinAddr aBase, TLinAddr aEnd)

	{

	for (TUint addr = aBase ; addr != aEnd ; addr += (1 << KChunkShift))

		{

		TUint i = addr >> KChunkShift;		

		if ((aLeft[i] & KPdeEqualMask) != (aRight[i] & KPdeEqualMask))

			return EFalse;

		}	

	return ETrue;

	}

TInt MapProcess(DMemModelProcess* aProcess, TBool aForce)

	{

	// Check top half of page dir is same as for the kernel

	TUint a = (TUint)aProcess;

	DMonObject* o = (DMonObject*)aProcess;

	if (a<KPrimaryIOBase || a>=KKernelSectionEnd || (a&3))

		return KErrArgument;

	if (o->Type()!=EProcess)

		return KErrArgument;

	const TPde* kpd=(const TPde*)KPageDirectoryBase;

	const TPde* ppd=(const TPde*)(KPageDirectoryBase+(aProcess->iOsAsid<<KPageTableShift));

	if (!PdesEqual(kpd, ppd, KRomLinearBase, KUserGlobalDataEnd) ||		// ROM + user global

		!PdesEqual(kpd, ppd, KRamDriveEndAddress, 0x00000000))			// kernel mappings

		{

		if (!aForce)

			return KErrCorrupt;

		wordmove((TAny*)(ppd+(KRomLinearBase>>KChunkShift)), (TAny*)(kpd+(KRomLinearBase>>KChunkShift)), ((KUserGlobalDataEnd-KRomLinearBase)>>KChunkShift)*sizeof(TPde));

		wordmove((TAny*)(ppd+(KRamDriveEndAddress>>KChunkShift)), (TAny*)(kpd+(KRamDriveEndAddress>>KChunkShift)), ((0-KRamDriveEndAddress)>>KChunkShift)*sizeof(TPde));

		}

	SetPageDir(aProcess);

	return KErrNone;

	}