// 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;

 	}