// 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\direct\mprocess.cpp

// 

//

#include <memmodel.h>

#include <kernel/cache.h>

#define iMState		iWaitLink.iSpare1

_LIT(KDollarDat,"$DAT");

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

 * Process

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

void DMemModelProcess::Destruct()

	{

	DProcess::Destruct();

	}

TInt DMemModelProcess::NewChunk(DChunk*& aChunk, SChunkCreateInfo& aInfo, TLinAddr& aRunAddr)

	{

	aChunk=NULL;

	DMemModelChunk* pC=new DMemModelChunk;

	if (!pC)

		return KErrNoMemory;

	pC->iChunkType=aInfo.iType;

	if (!aInfo.iGlobal && (iAttributes & DMemModelProcess::EPrivate)!=0)

		pC->iAttributes |= DMemModelChunk::EPrivate;

	pC->iOwningProcess=(aInfo.iGlobal)?NULL:this;

	TInt r=pC->Create(aInfo);

	if (r==KErrNone && (aInfo.iOperations & SChunkCreateInfo::EAdjust))

		{

		if (aInfo.iRunAddress!=0)

			pC->SetFixedAddress(aInfo.iRunAddress,aInfo.iPreallocated);

		if (aInfo.iPreallocated==0)

			{

			if (pC->iAttributes & DChunk::EDisconnected)

				{

				r=pC->Commit(aInfo.iInitialBottom,aInfo.iInitialTop-aInfo.iInitialBottom);

				}

			else if (pC->iAttributes & DChunk::EDoubleEnded)

				{

				r=pC->AdjustDoubleEnded(aInfo.iInitialBottom,aInfo.iInitialTop);

				}

			else

				{

				r=pC->Adjust(aInfo.iInitialTop);

				}

			}

		if (r==KErrNone)

			{

			aRunAddr=(TLinAddr)pC->Base();

			}

		}

	if (r==KErrNone)

		{

		pC->iDestroyedDfc = aInfo.iDestroyedDfc;

		aChunk=(DChunk*)pC;

		}

	else

		pC->Close(NULL);	// NULL since chunk can't have been added to process

	return r;

	}

TInt DMemModelProcess::DoCreate(TBool aKernelProcess, TProcessCreateInfo&)

	{

	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::DoCreate %O",this))

	if (aKernelProcess)

		iAttributes=ESupervisor|EPrivate;

	else

		iAttributes=0;

	return KErrNone;

	}

TInt DMemModelProcess::CreateDataBssStackArea(TProcessCreateInfo& aInfo)

	{

	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::CreateDataBssStackArea %O",this));

	TInt dataBssSize=MM::RoundToBlockSize(aInfo.iTotalDataSize);

	TInt r=KErrNone;

	DMemModelCodeSeg* cs=(DMemModelCodeSeg*)iTempCodeSeg;

	if (!cs->iXIP && dataBssSize)

		{

		// only RAM loaded processes need data chunks

		// ROM processes have their .data/.bss areas reserved by ROMBUILD

		SChunkCreateInfo cinfo;

		cinfo.iGlobal=EFalse;

		cinfo.iAtt=TChunkCreate::ENormal;

		cinfo.iForceFixed=EFalse;

		cinfo.iOperations=SChunkCreateInfo::EAdjust|SChunkCreateInfo::EAdd;

		cinfo.iType=EUserData;

		cinfo.iMaxSize=dataBssSize;

		cinfo.iInitialBottom=0;

		cinfo.iInitialTop=dataBssSize;

		cinfo.iPreallocated=0;

		cinfo.iName.Set(KDollarDat);

		cinfo.iOwner=this;

		cinfo.iRunAddress=0;

		r=NewChunk((DChunk*&)iDataBssStackChunk, cinfo, iDataBssRunAddress);

		__KTRACE_OPT(KPROC,Kern::Printf("RAM process, ret=%d, data at %08x+%x",r,iDataBssRunAddress,dataBssSize));

		}

	else if (cs->iXIP)

		{

		iDataBssRunAddress=cs->RomInfo().iDataBssLinearBase;

		__KTRACE_OPT(KPROC,Kern::Printf("ROM process, data at %08x+%x",iDataBssRunAddress,dataBssSize));

		}

	return r;

	}

TInt DMemModelProcess::AddChunk(DChunk* aChunk,TBool isReadOnly)

	{

	return KErrNone;

	}

void DMemModelProcess::FinalRelease()

	{

	}

void DMemModelProcess::RemoveDllData()

//

// Call with CodeSegLock held

//

	{

	}

TInt DMemModelProcess::MapCodeSeg(DCodeSeg*)

	{

	return KErrNone;

	}

void DMemModelProcess::UnmapCodeSeg(DCodeSeg*)

	{

	}

TInt DMemModelProcess::NewShPool(DShPool*& /* aPool */, TShPoolCreateInfo& /* aInfo */)

	{

	return KErrNotSupported;

	}

TInt DThread::RawRead(const TAny* aSrc, TAny* aDest, TInt aLength, TInt aFlags, TIpcExcTrap* /*aExcTrap*/)

//

// Read from the thread's process.

// aSrc is run address of memory to read

// aDest is current address of destination

// Enter and leave with system locked

//

	{

	const TUint8* pS=(const TUint8*)aSrc;

	TUint8* pD=(TUint8*)aDest;

	TBool check=ETrue;

	while (aLength)

		{

		if (check)

			{

			if (iMState==EDead)

				return KErrDied;

			__KTRACE_OPT(KTHREAD2,Kern::Printf("DThread::Read %08x",pS));

			}

		TInt l=Min(aLength,K::MaxMemCopyInOneGo);

		memcpy(pD,pS,l);

		pD+=l;

		pS+=l;

		aLength-=l;

		if (aLength)

			check=NKern::FlashSystem();

		}

	return KErrNone;

	}

TInt DThread::RawWrite(const TAny* aDest, const TAny* aSrc, TInt aLength, TInt aFlags, DThread* anOriginatingThread, TIpcExcTrap* /*aExcTrap*/)

//

// Write to the thread's process.

// aDest is run address of memory to write

// aSrc is current address of destination

// anOriginatingThread is the thread on behalf of which this operation is performed (eg client of device driver).

// Enter and leave with system locked

//

	{

	TUint8* pD=(TUint8*)aDest;

	const TUint8* pS=(const TUint8*)aSrc;

	TBool check=ETrue;

	while (aLength)

		{

		if (check)

			{

			if (iMState==EDead)

				return KErrDied;

			__KTRACE_OPT(KTHREAD2,Kern::Printf("DThread::Write %08x",pD));

			}

		TInt l=Min(aLength,K::MaxMemCopyInOneGo);

		memcpy(pD,pS,l);

		pD+=l;

		pS+=l;

		aLength-=l;

		if (aLength)

			check=NKern::FlashSystem();

		}

	return KErrNone;

	}

#ifdef __DEBUGGER_SUPPORT__

TInt CodeModifier::SafeWriteCode(DProcess* /*aProcess*/, TLinAddr /*aAddress*/, TInt /*aSize*/, TUint /*aValue*/, void* /*aOldValue*/)

	{

	return KErrNotSupported;

	}

TInt CodeModifier::WriteCode(TLinAddr /*aAddress*/, TInt /*aSize*/, TUint /*aValue*/, void* /*aOldValue*/)

	{

	return KErrNotSupported;

	}

#endif //__DEBUGGER_SUPPORT__

TInt DThread::ReadAndParseDesHeader(const TAny* aSrc, TDesHeader& aDest)

//

// Read and parse the header of a remote descriptor.

// Enter and leave with system locked.

//

	{

	TRawDesHeader& header = (TRawDesHeader&)aDest;

	static const TUint8 LengthLookup[16]={4,8,12,8,12,0,0,0,0,0,0,0,0,0,0,0};

	const TUint32* pS=(const TUint32*)aSrc;

	if (!pS || (TInt(pS)&3)!=0)

		return KErrBadDescriptor;

	if (Kern::SafeRead(pS,&header,sizeof(TUint32)))

		return KErrBadDescriptor;

	TInt type=header[0]>>KShiftDesType8;

	TInt l=LengthLookup[type];

	if (l==0)

		return KErrBadDescriptor;

	if (l>(TInt)sizeof(TUint32) && Kern::SafeRead(pS+1,&header[1],l-sizeof(TUint32)))

		return KErrBadDescriptor;

	return K::ParseDesHeader(aSrc, header, aDest);

	}

DChunk* DThread::OpenSharedChunk(const TAny* aAddress, TBool /*aWrite*/, TInt& aOffset)

	{

	DMemModelChunk* chunk=0;

	DObjectCon& chunks=*K::Containers[EChunk];

	NKern::LockSystem();

	chunks.Lock()->Wait();

	TInt count=chunks.Count();

	TInt i;

	TUint offset=0;

	for(i=0;i<count;i++)

		{

		DMemModelChunk* pC=(DMemModelChunk*)chunks[i];

		offset = (TUint)aAddress-(TUint)pC->Base();

		if(offset<TUint(pC->iMaxSize))

			{

			chunk = pC;

			break;

			}

		}

	chunks.Lock()->Signal();

	if(!chunk)

		return 0;

	if((chunk->iChunkType!=ESharedKernelSingle && chunk->iChunkType!=ESharedKernelMultiple))

		return 0;

	if(chunk->Open()!=KErrNone)

		return 0;

	aOffset = offset;

	return chunk;

	}

TInt DThread::PrepareMemoryForDMA(const TAny* aLinAddr, TInt aSize, TPhysAddr* aPhysicalPageList)

	{

	return KErrNotSupported;

	}

TInt DThread::ReleaseMemoryFromDMA(const TAny* aLinAddr, TInt aSize, TPhysAddr* aPhysicalPageList)

	{

	return KErrNotSupported;

	}