sl@0: // Copyright (c) 1994-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of the License "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #include <memmodel.h>
sl@0: #include "mmu/mm.h"
sl@0: #include "mmu/maddrcont.h"
sl@0: #include "mmboot.h"
sl@0: #include <kernel/cache.h>
sl@0: #include "execs.h"
sl@0: 
sl@0: #define iMState		iWaitLink.iSpare1
sl@0: 
sl@0: NFastMutex TheSharedChunkLock;
sl@0: 
sl@0: #ifndef _DEBUG
sl@0: const TInt KChunkGranularity = 4; // amount to grow SChunkInfo list by
sl@0: const TInt KMaxChunkInfosInOneGo = 100; // max number of SChunkInfo objects to copy with System Lock held
sl@0: #else // if debug...
sl@0: const TInt KChunkGranularity = 1;
sl@0: const TInt KMaxChunkInfosInOneGo = 1;
sl@0: #endif
sl@0: 
sl@0: 
sl@0: 
sl@0: /********************************************
sl@0:  * Process
sl@0:  ********************************************/
sl@0: 
sl@0: DMemModelProcess::~DMemModelProcess()
sl@0: 	{
sl@0: 	__KTRACE_OPT(KMMU,Kern::Printf("DMemModelProcess destruct"));
sl@0: 	Destruct();
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void DMemModelProcess::Destruct()
sl@0: 	{
sl@0: 	__ASSERT_ALWAYS(!iOsAsidRefCount, MM::Panic(MM::EProcessDestructOsAsidRemaining));
sl@0: 	__ASSERT_ALWAYS(!iChunkCount, MM::Panic(MM::EProcessDestructChunksRemaining));
sl@0: 	Kern::Free(iChunks);
sl@0: 	__ASSERT_ALWAYS(!iSharedChunks || iSharedChunks->Count()==0, MM::Panic(MM::EProcessDestructChunksRemaining));
sl@0: 	delete iSharedChunks;
sl@0: 
sl@0: 	DProcess::Destruct();
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DMemModelProcess::TryOpenOsAsid()
sl@0: 	{
sl@0: 	if (__e32_atomic_tas_ord32(&iOsAsidRefCount, 1, 1, 0))
sl@0: 		{
sl@0: 		return iOsAsid;
sl@0: 		}
sl@0: 	return KErrDied;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void DMemModelProcess::CloseOsAsid()
sl@0: 	{
sl@0: 	if (__e32_atomic_tas_ord32(&iOsAsidRefCount, 1, -1, 0) == 1)
sl@0: 		{// Last reference has been closed so free the asid.
sl@0: 		MM::AddressSpaceFree(iOsAsid);
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void DMemModelProcess::AsyncCloseOsAsid()
sl@0: 	{
sl@0: 	if (__e32_atomic_tas_ord32(&iOsAsidRefCount, 1, -1, 0) == 1)
sl@0: 		{// Last reference has been closed so free the asid asynchronusly.
sl@0: 		MM::AsyncAddressSpaceFree(iOsAsid);
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DMemModelProcess::NewChunk(DChunk*& aChunk, SChunkCreateInfo& aInfo, TLinAddr& aRunAddr)
sl@0: 	{
sl@0: 	aChunk=NULL;
sl@0: 
sl@0: 	DMemModelChunk* pC=new DMemModelChunk;
sl@0: 	if (!pC)
sl@0: 		return KErrNoMemory;
sl@0: 
sl@0: 	TChunkType type = aInfo.iType;
sl@0: 	pC->iChunkType=type;
sl@0: 	TInt r=pC->SetAttributes(aInfo);
sl@0: 	if (r!=KErrNone)
sl@0: 		{
sl@0: 		pC->Close(NULL);
sl@0: 		return r;
sl@0: 		}
sl@0: 
sl@0: 	pC->iOwningProcess=(pC->iAttributes&DMemModelChunk::EPublic)?NULL:this;
sl@0: 	r=pC->Create(aInfo);
sl@0: 	if (r==KErrNone && (aInfo.iOperations & SChunkCreateInfo::EAdjust))
sl@0: 		{
sl@0: 		if (aInfo.iRunAddress!=0)
sl@0: 			pC->SetFixedAddress(aInfo.iRunAddress,aInfo.iPreallocated);
sl@0: 		if (aInfo.iPreallocated==0 && aInfo.iInitialTop!=0)
sl@0: 			{
sl@0: 			if (pC->iAttributes & DChunk::EDisconnected)
sl@0: 				{
sl@0: 				r=pC->Commit(aInfo.iInitialBottom,aInfo.iInitialTop-aInfo.iInitialBottom);
sl@0: 				}
sl@0: 			else if (pC->iAttributes & DChunk::EDoubleEnded)
sl@0: 				{
sl@0: 				r=pC->AdjustDoubleEnded(aInfo.iInitialBottom,aInfo.iInitialTop);
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				r=pC->Adjust(aInfo.iInitialTop);
sl@0: 				}
sl@0: 			}
sl@0: 		}
sl@0: 	if (r==KErrNone && (aInfo.iOperations & SChunkCreateInfo::EAdd))
sl@0: 		{
sl@0: 		r = AddChunk(pC, EFalse);
sl@0: 		}
sl@0: 	if (r==KErrNone)
sl@0: 		{
sl@0: 		if(pC->iKernelMapping)
sl@0: 			aRunAddr = (TLinAddr)MM::MappingBase(pC->iKernelMapping);
sl@0: 		pC->iDestroyedDfc = aInfo.iDestroyedDfc;
sl@0: 		aChunk=(DChunk*)pC;
sl@0: 		}
sl@0: 	else
sl@0: 		pC->Close(NULL);	// NULL since chunk can't have been added to process
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /**
sl@0: Determine whether this process should be data paged.
sl@0: 
sl@0: @param aInfo	A reference to the create info for this process.
sl@0:  */
sl@0: TInt DMemModelProcess::SetPaging(const TProcessCreateInfo& aInfo)
sl@0: 	{
sl@0: 	TUint pagedFlags = aInfo.iFlags & TProcessCreateInfo::EDataPagingMask;
sl@0: 	// If KImageDataPaged and KImageDataUnpaged flags present then corrupt
sl@0: 	// Check this first to ensure that it is always verified.
sl@0: 	if (pagedFlags == TProcessCreateInfo::EDataPagingMask)
sl@0: 		{
sl@0: 		return KErrCorrupt;
sl@0: 		}
sl@0: 
sl@0: 	if (aInfo.iAttr & ECodeSegAttKernel ||
sl@0: 		!(K::MemModelAttributes & EMemModelAttrDataPaging))
sl@0: 		{// Kernel process shouldn't be data paged or no data paging device installed.
sl@0: 		return KErrNone;
sl@0: 		}
sl@0: 
sl@0: 	TUint dataPolicy = TheSuperPage().KernelConfigFlags() & EKernelConfigDataPagingPolicyMask;
sl@0: 	if (dataPolicy == EKernelConfigDataPagingPolicyAlwaysPage)
sl@0: 		{
sl@0: 		iAttributes |= EDataPaged;
sl@0: 		return KErrNone;
sl@0: 		}
sl@0: 	if (dataPolicy == EKernelConfigDataPagingPolicyNoPaging)
sl@0: 		{// No paging allowed so just return.
sl@0: 		return KErrNone;
sl@0: 		}
sl@0: 	if (pagedFlags == TProcessCreateInfo::EDataPaged)
sl@0: 		{
sl@0: 		iAttributes |= EDataPaged;
sl@0: 		return KErrNone;
sl@0: 		}
sl@0: 	if (pagedFlags == TProcessCreateInfo::EDataUnpaged)
sl@0: 		{// No paging set so just return.
sl@0: 		return KErrNone;
sl@0: 		}
sl@0: 	// Neither paged nor unpaged set so use default paging policy.
sl@0: 	// dataPolicy must be EKernelConfigDataPagingPolicyDefaultUnpaged or 
sl@0: 	// EKernelConfigDataPagingPolicyDefaultPaged.
sl@0: 	__NK_ASSERT_DEBUG(pagedFlags == TProcessCreateInfo::EDataPagingUnspecified);
sl@0: 	__NK_ASSERT_DEBUG(	dataPolicy == EKernelConfigDataPagingPolicyDefaultPaged ||
sl@0: 						dataPolicy == EKernelConfigDataPagingPolicyDefaultUnpaged);
sl@0: 	if (dataPolicy == EKernelConfigDataPagingPolicyDefaultPaged)
sl@0: 		{
sl@0: 		iAttributes |= EDataPaged;
sl@0: 		}
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DMemModelProcess::DoCreate(TBool aKernelProcess, TProcessCreateInfo& aInfo)
sl@0: 	{
sl@0: 	// Required so we can detect whether a process has been created and added 
sl@0: 	// to its object container by checking for iContainerID!=EProcess.
sl@0: 	__ASSERT_COMPILE(EProcess != 0);
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf(">DMemModelProcess::DoCreate %O",this));
sl@0: 	TInt r=KErrNone;
sl@0: 
sl@0: 	if (aKernelProcess)
sl@0: 		{
sl@0: 		iAttributes |= ESupervisor;
sl@0: 		iOsAsid = KKernelOsAsid;
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		r = MM::AddressSpaceAlloc(iPageDir);
sl@0: 		if (r>=0)
sl@0: 			{
sl@0: 			iOsAsid = r;
sl@0: 			r = KErrNone;
sl@0: 			}
sl@0: 		}
sl@0: 	if (r == KErrNone)
sl@0: 		{// Add this process's own reference to its os asid.
sl@0: 		__e32_atomic_store_ord32(&iOsAsidRefCount, 1);
sl@0: 		}
sl@0: 
sl@0: #ifdef BTRACE_FLEXIBLE_MEM_MODEL
sl@0: 	BTrace8(BTrace::EFlexibleMemModel,BTrace::EAddressSpaceId,this,iOsAsid);
sl@0: #endif
sl@0: 
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("OS ASID=%d, PD=%08x",iOsAsid,iPageDir));
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("<DMemModelProcess::DoCreate %d",r));
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: TInt DMemModelProcess::CreateDataBssStackArea(TProcessCreateInfo& aInfo)
sl@0: 	{
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::CreateDataBssStackArea %O",this));
sl@0: 	TInt r = KErrNone;
sl@0: 	TInt dataBssSize = MM::RoundToPageSize(aInfo.iTotalDataSize);
sl@0: 	if(dataBssSize)
sl@0: 		{
sl@0: 		DMemoryObject* memory;
sl@0: 		TMemoryObjectType memoryType = iAttributes&EDataPaged ? EMemoryObjectPaged : EMemoryObjectMovable;
sl@0: 		r = MM::MemoryNew(memory,memoryType,MM::BytesToPages(dataBssSize));
sl@0: 		if(r==KErrNone)
sl@0: 			{
sl@0: 			r = MM::MemoryAlloc(memory,0,MM::BytesToPages(dataBssSize));
sl@0: 			if(r==KErrNone)
sl@0: 				{
sl@0: 				r = MM::MappingNew(iDataBssMapping,memory,EUserReadWrite,OsAsid());
sl@0: 				}
sl@0: 			if(r!=KErrNone)
sl@0: 				MM::MemoryDestroy(memory);
sl@0: 			else
sl@0: 				{
sl@0: 				iDataBssRunAddress = MM::MappingBase(iDataBssMapping);
sl@0: #ifdef BTRACE_FLEXIBLE_MEM_MODEL
sl@0: 				BTrace8(BTrace::EFlexibleMemModel,BTrace::EMemoryObjectIsProcessStaticData,memory,this);
sl@0: #endif
sl@0: 				}
sl@0: 			}
sl@0: 		}
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DataBssSize=%x, ",dataBssSize));
sl@0: 
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DMemModelProcess::AttachExistingCodeSeg(TProcessCreateInfo& aInfo)
sl@0: 	{
sl@0: 	TInt r = DEpocProcess::AttachExistingCodeSeg(aInfo);
sl@0: 	if(r==KErrNone)
sl@0: 		{
sl@0: 		// allocate virtual memory for the EXEs codeseg...
sl@0: 		DMemModelCodeSeg* seg = (DMemModelCodeSeg*)iTempCodeSeg;
sl@0: 		if(seg->iAttr&ECodeSegAttAddrNotUnique)
sl@0: 			{
sl@0: 			TUint codeSize = seg->iSize;
sl@0: 			TLinAddr codeAddr = seg->RamInfo().iCodeRunAddr;
sl@0: 			TBool isDemandPaged = seg->iAttr&ECodeSegAttCodePaged;
sl@0: 			// Allocate virtual memory for the code seg using the os asid.
sl@0: 			// No need to open a reference on os asid as process not fully 
sl@0: 			// created yet so it can't die and free the os asid.
sl@0: 			r = MM::VirtualAlloc(OsAsid(),codeAddr,codeSize,isDemandPaged);
sl@0: 			if(r==KErrNone)
sl@0: 				{
sl@0: 				iCodeVirtualAllocSize = codeSize;
sl@0: 				iCodeVirtualAllocAddress = codeAddr;
sl@0: 				}
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DMemModelProcess::AddChunk(DChunk* aChunk, TBool aIsReadOnly)
sl@0: 	{
sl@0: 	DMemModelChunk* pC=(DMemModelChunk*)aChunk;
sl@0: 	if(pC->iOwningProcess && this!=pC->iOwningProcess)
sl@0: 		return KErrAccessDenied;
sl@0: 
sl@0: 	TInt r = WaitProcessLock();
sl@0: 	if(r==KErrNone)
sl@0: 		{
sl@0: 		TInt i = ChunkIndex(pC);
sl@0: 		if(i>=0) // Found the chunk in this process, just up its count
sl@0: 			{
sl@0: 			iChunks[i].iAccessCount++;
sl@0: 			__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::AddChunk %08x to %08x (Access count incremented to %d)",aChunk,this,iChunks[i].iAccessCount));
sl@0: 			SignalProcessLock();
sl@0: 			return KErrNone;
sl@0: 			}
sl@0: 		r = DoAddChunk(pC,aIsReadOnly);
sl@0: 		SignalProcessLock();
sl@0: 		}
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::AddChunk returns %d",r));
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void M::FsRegisterThread()
sl@0: 	{
sl@0: 	TInternalRamDrive::Unlock();
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void ExecHandler::UnlockRamDrive()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: 
sl@0: EXPORT_C TLinAddr TInternalRamDrive::Base()
sl@0: 	{
sl@0: 	DMemModelChunk* pC=(DMemModelChunk*)PP::TheRamDriveChunk;
sl@0: 	DMemModelProcess* pP=(DMemModelProcess*)TheCurrentThread->iOwningProcess;
sl@0: 	NKern::LockSystem();
sl@0: 	TLinAddr addr = (TLinAddr)pC->Base(pP);
sl@0: 	NKern::UnlockSystem();
sl@0: 	if(!addr)
sl@0: 		{
sl@0: 		Unlock();
sl@0: 		NKern::LockSystem();
sl@0: 		addr = (TLinAddr)pC->Base(pP);
sl@0: 		NKern::UnlockSystem();
sl@0: 		}
sl@0: 	return addr;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: EXPORT_C void TInternalRamDrive::Unlock()
sl@0: 	{
sl@0: 	DMemModelChunk* pC=(DMemModelChunk*)PP::TheRamDriveChunk;
sl@0: 	DMemModelProcess* pP=(DMemModelProcess*)TheCurrentThread->iOwningProcess;
sl@0: 	
sl@0: 	TInt r = pP->WaitProcessLock();
sl@0: 	if(r==KErrNone)
sl@0: 		if(pP->ChunkIndex(pC)==KErrNotFound)
sl@0: 			r = pP->DoAddChunk(pC,EFalse);
sl@0: 	__ASSERT_ALWAYS(r==KErrNone, MM::Panic(MM::EFsRegisterThread));
sl@0: 	pP->SignalProcessLock();
sl@0: 	}
sl@0: 
sl@0: 
sl@0: EXPORT_C void TInternalRamDrive::Lock()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DMemModelProcess::DoAddChunk(DMemModelChunk* aChunk, TBool aIsReadOnly)
sl@0: 	{
sl@0: 	//
sl@0: 	// Must hold the process $LOCK mutex before calling this.
sl@0: 	// As the process lock is held it is safe to access iOsAsid without a reference.
sl@0: 	//
sl@0: 
sl@0: 	__NK_ASSERT_DEBUG(ChunkIndex(aChunk)==KErrNotFound); // shouldn't be adding a chunk which is already added
sl@0: 
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess::DoAddChunk %O to %O",aChunk,this));
sl@0: 
sl@0: 	// create mapping for chunk...
sl@0: 	DMemoryMapping* mapping;
sl@0: 	TMappingPermissions perm = MM::MappingPermissions
sl@0: 		(
sl@0: 		iOsAsid!=(TInt)KKernelOsAsid,	// user?
sl@0: 		aIsReadOnly==false, // write?
sl@0: 		aChunk->iAttributes&DMemModelChunk::ECode // execute?
sl@0: 		);
sl@0: 	TInt r;
sl@0: 	if(aChunk->iFixedBase) // HACK, kernel chunk has a fixed iBase
sl@0: 		r = MM::MappingNew(mapping,aChunk->iMemoryObject,perm,iOsAsid,EMappingCreateExactVirtual,(TLinAddr)aChunk->iFixedBase);
sl@0: 	else
sl@0: 		r = MM::MappingNew(mapping,aChunk->iMemoryObject,perm,iOsAsid);
sl@0: 	if(r!=KErrNone)
sl@0: 		return r;
sl@0: 	if(iOsAsid==0)
sl@0: 		aChunk->iKernelMapping = mapping;
sl@0: 	TLinAddr base = MM::MappingBase(mapping);
sl@0: 
sl@0: 	// expand chunk info memory if required...
sl@0: 	if(iChunkCount==iChunkAlloc)
sl@0: 		{
sl@0: 		TInt newAlloc = iChunkAlloc+KChunkGranularity;
sl@0: 		r = Kern::SafeReAlloc((TAny*&)iChunks,iChunkAlloc*sizeof(SChunkInfo),newAlloc*sizeof(SChunkInfo));
sl@0: 		if(r!=KErrNone)
sl@0: 			{
sl@0: 			MM::MappingDestroy(mapping);
sl@0: 			return r;
sl@0: 			}
sl@0: 		iChunkAlloc = newAlloc;
sl@0: 		}
sl@0: 
sl@0: 	// insert new chunk info...
sl@0: 	TUint i = ChunkInsertIndex(aChunk);
sl@0: 	SChunkInfo* info = iChunks+i;
sl@0: 	SChunkInfo* infoEnd = iChunks+iChunkCount;
sl@0: 	NKern::LockSystem();
sl@0: 	++iChunkCount;
sl@0: 	for(;;)
sl@0: 		{
sl@0: 		// make space for new chunk info by shuffling along
sl@0: 		// existing infos KMaxChunkInfosInOneGo at a time...
sl@0: 		SChunkInfo* infoPtr = infoEnd-KMaxChunkInfosInOneGo;
sl@0: 		if(infoPtr<info)
sl@0: 			infoPtr = info;
sl@0: 		memmove(infoPtr+1,infoPtr,(TLinAddr)infoEnd-(TLinAddr)infoPtr);
sl@0: 		infoEnd = infoPtr;
sl@0: 		if(infoEnd<=info)
sl@0: 			break;
sl@0: 		NKern::FlashSystem();
sl@0: 		}
sl@0: 	info->iChunk = aChunk;
sl@0: 	info->iMapping = mapping;
sl@0: 	info->iAccessCount = 1;
sl@0: 	info->iIsReadOnly = aIsReadOnly;
sl@0: 	NKern::UnlockSystem();
sl@0: 
sl@0: 	// add chunk to list of Shared Chunks...
sl@0: 	if(aChunk->iChunkType==ESharedKernelSingle || aChunk->iChunkType==ESharedKernelMultiple)
sl@0: 		{
sl@0: 		if(!iSharedChunks)
sl@0: 			iSharedChunks = new RAddressedContainer(&TheSharedChunkLock,iProcessLock);
sl@0: 		if(!iSharedChunks)
sl@0: 			r = KErrNoMemory;
sl@0: 		else
sl@0: 			r = iSharedChunks->Add(base,aChunk);
sl@0: 		if(r!=KErrNone)
sl@0: 			{
sl@0: 			DoRemoveChunk(i);
sl@0: 			return r;
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	// done OK...
sl@0: 	__DEBUG_EVENT(EEventUpdateProcess, this);
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void DMemModelProcess::DoRemoveChunk(TInt aIndex)
sl@0: 	{
sl@0: 	__DEBUG_EVENT(EEventUpdateProcess, this);
sl@0: 
sl@0: 	DMemModelChunk* chunk = iChunks[aIndex].iChunk;
sl@0: 	DMemoryMapping* mapping = iChunks[aIndex].iMapping;
sl@0: 
sl@0: 	if(chunk->iChunkType==ESharedKernelSingle || chunk->iChunkType==ESharedKernelMultiple)
sl@0: 		{
sl@0: 		// remove chunk from list of Shared Chunks...
sl@0: 		if(iSharedChunks)
sl@0: 			{
sl@0: 			iSharedChunks->Remove(MM::MappingBase(mapping));
sl@0: #ifdef _DEBUG
sl@0: 			// delete iSharedChunks if it's empty, so memory leak test code passes...
sl@0: 			if(iSharedChunks->Count()==0)
sl@0: 				{
sl@0: 				NKern::FMWait(&TheSharedChunkLock);
sl@0: 				RAddressedContainer* s = iSharedChunks;
sl@0: 				iSharedChunks = 0;
sl@0: 				NKern::FMSignal(&TheSharedChunkLock);
sl@0: 				delete s;
sl@0: 				}
sl@0: #endif
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	// remove chunk from array...
sl@0: 	SChunkInfo* infoStart = iChunks+aIndex+1;
sl@0: 	SChunkInfo* infoEnd = iChunks+iChunkCount;
sl@0: 	NKern::LockSystem();
sl@0: 	for(;;)
sl@0: 		{
sl@0: 		// shuffle existing infos down KMaxChunkInfosInOneGo at a time...
sl@0: 		SChunkInfo* infoPtr = infoStart+KMaxChunkInfosInOneGo;
sl@0: 		if(infoPtr>infoEnd)
sl@0: 			infoPtr = infoEnd;
sl@0: 		memmove(infoStart-1,infoStart,(TLinAddr)infoPtr-(TLinAddr)infoStart);
sl@0: 		infoStart = infoPtr;
sl@0: 		if(infoStart>=infoEnd)
sl@0: 			break;
sl@0: 		NKern::FlashSystem();
sl@0: 		}
sl@0: 	--iChunkCount;
sl@0: 	NKern::UnlockSystem();
sl@0: 
sl@0: 	if(mapping==chunk->iKernelMapping)
sl@0: 		chunk->iKernelMapping = 0;
sl@0: 
sl@0: 	MM::MappingDestroy(mapping);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /**
sl@0: Final chance for process to release resources during its death.
sl@0: 
sl@0: Called with process $LOCK mutex held (if it exists).
sl@0: This mutex will not be released before it is deleted.
sl@0: I.e. no other thread will ever hold the mutex again.
sl@0: */
sl@0: void DMemModelProcess::FinalRelease()
sl@0: 	{
sl@0: 	// Clean up any left over chunks (such as SharedIo buffers)
sl@0: 	if(iProcessLock)
sl@0: 		while(iChunkCount)
sl@0: 			DoRemoveChunk(0);
sl@0: 	// Destroy the remaining mappings and memory objects owned by this process
sl@0: 	MM::MappingAndMemoryDestroy(iDataBssMapping);
sl@0: 	if(iCodeVirtualAllocSize)
sl@0: 		MM::VirtualFree(iOsAsid,iCodeVirtualAllocAddress,iCodeVirtualAllocSize);
sl@0: 
sl@0: 	// Close the original reference on the os asid.
sl@0: 	CloseOsAsid();
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void DMemModelProcess::RemoveChunk(DMemModelChunk *aChunk)
sl@0: 	{
sl@0: 	// note that this can't be called after the process $LOCK mutex has been deleted
sl@0: 	// since it can only be called by a thread in this process doing a handle close or
sl@0: 	// dying, or by the process handles array being deleted due to the process dying,
sl@0: 	// all of which happen before $LOCK is deleted.
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess %O RemoveChunk %O",this,aChunk));
sl@0: 	Kern::MutexWait(*iProcessLock);
sl@0: 	TInt i = ChunkIndex(aChunk);
sl@0: 	if(i>=0) // Found the chunk
sl@0: 		{
sl@0: 		__KTRACE_OPT(KPROC,Kern::Printf("Chunk access count %d",iChunks[i].iAccessCount));
sl@0: 		if(--iChunks[i].iAccessCount==0)
sl@0: 			{
sl@0: 			DoRemoveChunk(i);
sl@0: 			}
sl@0: 		}
sl@0: 	Kern::MutexSignal(*iProcessLock);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TUint8* DMemModelChunk::Base(DProcess* aProcess)
sl@0: 	{
sl@0: 	DMemModelProcess* pP = (DMemModelProcess*)aProcess;
sl@0: 	DMemoryMapping* mapping = 0;
sl@0: 
sl@0: 	if(iKernelMapping && pP==K::TheKernelProcess)
sl@0: 		{
sl@0: 		// shortcut for shared chunks...
sl@0: 		mapping = iKernelMapping;
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		// find chunk in process...
sl@0: 		TInt i = pP->ChunkIndex(this);
sl@0: 		if(i>=0)
sl@0: 			mapping = pP->iChunks[i].iMapping;
sl@0: 		}
sl@0: 
sl@0: 	if(!mapping)
sl@0: 		return 0;
sl@0: 
sl@0: 	return (TUint8*)MM::MappingBase(mapping);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: DChunk* DThread::OpenSharedChunk(const TAny* aAddress, TBool aWrite, TInt& aOffset)
sl@0: 	{
sl@0: 	DMemModelChunk* chunk = 0;
sl@0: 
sl@0: 	NKern::FMWait(&TheSharedChunkLock);
sl@0: 	RAddressedContainer* list = ((DMemModelProcess*)iOwningProcess)->iSharedChunks;
sl@0: 	if(list)
sl@0: 		{
sl@0: 		// search list...
sl@0: 		TUint offset;
sl@0: 		chunk = (DMemModelChunk*)list->Find((TLinAddr)aAddress,offset);
sl@0: 		if(chunk && offset<TUint(chunk->iMaxSize) && chunk->Open()==KErrNone)
sl@0: 			aOffset = offset; // chunk found and opened successfully
sl@0: 		else
sl@0: 			chunk = 0; // failed
sl@0: 		}
sl@0: 	NKern::FMSignal(&TheSharedChunkLock);
sl@0: 
sl@0: 	return chunk;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TUint DMemModelProcess::ChunkInsertIndex(DMemModelChunk* aChunk)
sl@0: 	{
sl@0: 	// need to hold iProcessLock or System Lock...
sl@0: #ifdef _DEBUG
sl@0: 	if(K::Initialising==false && iProcessLock!=NULL && iProcessLock->iCleanup.iThread!=&Kern::CurrentThread())
sl@0: 		{
sl@0: 		// don't hold iProcessLock, so...
sl@0: 		__ASSERT_SYSTEM_LOCK;
sl@0: 		}
sl@0: #endif
sl@0: 
sl@0: 	// binary search...
sl@0: 	SChunkInfo* list = iChunks;
sl@0: 	TUint l = 0;
sl@0: 	TUint r = iChunkCount;
sl@0: 	TUint m;
sl@0: 	while(l<r)
sl@0: 		{
sl@0: 		m = (l+r)>>1;
sl@0: 		DChunk* x = list[m].iChunk;
sl@0: 		if(x<=aChunk)
sl@0: 			l = m+1;
sl@0: 		else
sl@0: 			r = m;
sl@0: 		}
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DMemModelProcess::ChunkIndex(DMemModelChunk* aChunk)
sl@0: 	{
sl@0: 	TUint i = ChunkInsertIndex(aChunk);
sl@0: 	if(i && iChunks[--i].iChunk==aChunk)
sl@0: 		return i;
sl@0: 	return KErrNotFound;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DMemModelProcess::MapCodeSeg(DCodeSeg* aSeg)
sl@0: 	{
sl@0: 	__ASSERT_CRITICAL;	// Must be in critical section so can't leak os asid references.
sl@0: 		
sl@0: 	DMemModelCodeSeg& seg=*(DMemModelCodeSeg*)aSeg;
sl@0: 	__KTRACE_OPT(KDLL,Kern::Printf("Process %O MapCodeSeg %C", this, aSeg));
sl@0: 	TBool kernel_only=( (seg.iAttr&(ECodeSegAttKernel|ECodeSegAttGlobal)) == ECodeSegAttKernel );
sl@0: 	TBool user_local=( (seg.iAttr&(ECodeSegAttKernel|ECodeSegAttGlobal)) == 0 );
sl@0: 	if (kernel_only && !(iAttributes&ESupervisor))
sl@0: 		return KErrNotSupported;
sl@0: 	if (seg.iAttr&ECodeSegAttKernel)
sl@0: 		return KErrNone;	// no extra mappings needed for kernel code
sl@0: 
sl@0: 	// Attempt to open a reference on the os asid it is required so
sl@0: 	// MapUserRamCode() and CommitDllData() can use iOsAsid safely.
sl@0: 	TInt osAsid = TryOpenOsAsid();
sl@0: 	if (osAsid < 0)
sl@0: 		{// The process has died.
sl@0: 		return KErrDied;
sl@0: 		}
sl@0: 
sl@0: 	TInt r=KErrNone;
sl@0: 	if (user_local)
sl@0: 		r=MapUserRamCode(seg.Memory());
sl@0: 	if (seg.IsDll())
sl@0: 		{
sl@0: 		TInt total_data_size;
sl@0: 		TLinAddr data_base;
sl@0: 		seg.GetDataSizeAndBase(total_data_size, data_base);
sl@0: 		if (r==KErrNone && total_data_size)
sl@0: 			{
sl@0: 			TInt size=MM::RoundToPageSize(total_data_size);
sl@0: 			r=CommitDllData(data_base, size, aSeg);
sl@0: 			if (r!=KErrNone && user_local)
sl@0: 				UnmapUserRamCode(seg.Memory());
sl@0: 			}
sl@0: 		}
sl@0: 	CloseOsAsid();
sl@0: 
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void DMemModelProcess::UnmapCodeSeg(DCodeSeg* aSeg)
sl@0: 	{
sl@0: 	__ASSERT_CRITICAL;	// Must be in critical section so can't leak os asid references.
sl@0: 
sl@0: 	DMemModelCodeSeg& seg=*(DMemModelCodeSeg*)aSeg;
sl@0: 	__KTRACE_OPT(KDLL,Kern::Printf("Process %O UnmapCodeSeg %C", this, aSeg));
sl@0: 	if (seg.iAttr&ECodeSegAttKernel)
sl@0: 		return;	// no extra mappings needed for kernel code
sl@0: 
sl@0: 	// Attempt to open a reference on the os asid it is required so
sl@0: 	// UnmapUserRamCode() and DecommitDllData() can use iOsAsid safely.
sl@0: 	TInt osAsid = TryOpenOsAsid();
sl@0: 	if (osAsid < 0)
sl@0: 		{// The process has died and it the process it will have cleaned up any code segs.
sl@0: 		return;
sl@0: 		}
sl@0: 
sl@0: 	if (seg.IsDll())
sl@0: 		{
sl@0: 		TInt total_data_size;
sl@0: 		TLinAddr data_base;
sl@0: 		seg.GetDataSizeAndBase(total_data_size, data_base);
sl@0: 		if (total_data_size)
sl@0: 			DecommitDllData(data_base, MM::RoundToPageSize(total_data_size));
sl@0: 		}
sl@0: 	if (seg.Memory())
sl@0: 		UnmapUserRamCode(seg.Memory());
sl@0: 
sl@0: 	CloseOsAsid();
sl@0: 	}
sl@0: 
sl@0: void DMemModelProcess::RemoveDllData()
sl@0: //
sl@0: // Call with CodeSegLock held
sl@0: //
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DMemModelProcess::MapUserRamCode(DMemModelCodeSegMemory* aMemory)
sl@0: 	{
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess %O MapUserRamCode %C %d %d",
sl@0: 									this, aMemory->iCodeSeg, iOsAsid, aMemory->iPagedCodeInfo!=0));
sl@0: 	__ASSERT_MUTEX(DCodeSeg::CodeSegLock);
sl@0: 
sl@0: 	TMappingCreateFlags createFlags = EMappingCreateExactVirtual;
sl@0: 
sl@0: 	if(!(aMemory->iCodeSeg->iAttr&ECodeSegAttAddrNotUnique))
sl@0: 		{
sl@0: 		// codeseg memory address is globally unique, (common address across all processes)...
sl@0: 		FlagSet(createFlags,EMappingCreateCommonVirtual);
sl@0: 		}
sl@0: 
sl@0: 	if(aMemory->iCodeSeg->IsExe())
sl@0: 		{
sl@0: 		// EXE codesegs have already had their virtual address allocated so we must adopt that...
sl@0: 		__NK_ASSERT_DEBUG(iCodeVirtualAllocSize);
sl@0: 		__NK_ASSERT_DEBUG(iCodeVirtualAllocAddress==aMemory->iRamInfo.iCodeRunAddr);
sl@0: 		iCodeVirtualAllocSize = 0;
sl@0: 		iCodeVirtualAllocAddress = 0;
sl@0: 		FlagSet(createFlags,EMappingCreateAdoptVirtual);
sl@0: 		}
sl@0: 
sl@0: 	DMemoryMapping* mapping;
sl@0: 	return MM::MappingNew(mapping,aMemory->iCodeMemoryObject,EUserExecute,iOsAsid,createFlags,aMemory->iRamInfo.iCodeRunAddr);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void DMemModelProcess::UnmapUserRamCode(DMemModelCodeSegMemory* aMemory)
sl@0: 	{
sl@0: 	__KTRACE_OPT(KPROC,Kern::Printf("DMemModelProcess %O UnmapUserRamCode %C %d %d",
sl@0: 									this, aMemory->iCodeSeg, iOsAsid, aMemory->iPagedCodeInfo!=0));
sl@0: 
sl@0: 	__ASSERT_MUTEX(DCodeSeg::CodeSegLock);
sl@0: 	MM::MappingDestroy(aMemory->iRamInfo.iCodeRunAddr,iOsAsid);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DMemModelProcess::CommitDllData(TLinAddr aBase, TInt aSize, DCodeSeg* aCodeSeg)
sl@0: 	{
sl@0: 	__KTRACE_OPT(KDLL,Kern::Printf("DMemModelProcess %O CommitDllData %08x+%x",this,aBase,aSize));
sl@0: 
sl@0: 	DMemoryObject* memory;
sl@0: 	TMemoryObjectType memoryType = aCodeSeg->iAttr&ECodeSegAttDataPaged ? EMemoryObjectPaged : EMemoryObjectMovable;
sl@0: 	TInt r = MM::MemoryNew(memory,memoryType,MM::BytesToPages(aSize));
sl@0: 	if(r==KErrNone)
sl@0: 		{
sl@0: 		r = MM::MemoryAlloc(memory,0,MM::BytesToPages(aSize));
sl@0: 		if(r==KErrNone)
sl@0: 			{
sl@0: 			DMemoryMapping* mapping;
sl@0: 			r = MM::MappingNew(mapping,memory,EUserReadWrite,iOsAsid,EMappingCreateCommonVirtual,aBase);
sl@0: 			}
sl@0: 		if(r!=KErrNone)
sl@0: 			MM::MemoryDestroy(memory);
sl@0: 		else
sl@0: 			{
sl@0: #ifdef BTRACE_FLEXIBLE_MEM_MODEL
sl@0: 			BTrace12(BTrace::EFlexibleMemModel,BTrace::EMemoryObjectIsDllStaticData,memory,aCodeSeg,this);
sl@0: #endif
sl@0: 			}
sl@0: 		
sl@0: 		}
sl@0: 	__KTRACE_OPT(KDLL,Kern::Printf("CommitDllData returns %d",r));
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: void DMemModelProcess::DecommitDllData(TLinAddr aBase, TInt aSize)
sl@0: 	{
sl@0: 	__KTRACE_OPT(KDLL,Kern::Printf("DMemModelProcess %O DecommitDllData %08x+%x",this,aBase,aSize));
sl@0: 	MM::MappingAndMemoryDestroy(aBase,iOsAsid);
sl@0: 	}
sl@0: 
sl@0: void DMemModelProcess::BTracePrime(TInt aCategory)
sl@0: 	{
sl@0: 	DProcess::BTracePrime(aCategory);
sl@0: 
sl@0: #ifdef BTRACE_FLEXIBLE_MEM_MODEL
sl@0: 	if (aCategory == BTrace::EFlexibleMemModel || aCategory == -1)
sl@0: 		{
sl@0: 		BTrace8(BTrace::EFlexibleMemModel,BTrace::EAddressSpaceId,this,iOsAsid);
sl@0: 
sl@0: 		if (iDataBssMapping)
sl@0: 			{
sl@0: 			DMemoryObject* memory = MM::MappingGetAndOpenMemory(iDataBssMapping);
sl@0: 			if (memory)
sl@0: 				{
sl@0: 				MM::MemoryBTracePrime(memory);
sl@0: 				BTrace8(BTrace::EFlexibleMemModel,BTrace::EMemoryObjectIsProcessStaticData,memory,this);
sl@0: 				MM::MemoryClose(memory);
sl@0: 				}
sl@0: 			}
sl@0: 		
sl@0: 		// Trace memory objects for DLL static data
sl@0: 		SDblQue cs_list;
sl@0: 		DCodeSeg::UnmarkAll(DCodeSeg::EMarkListDeps|DCodeSeg::EMarkUnListDeps);
sl@0: 		TraverseCodeSegs(&cs_list, NULL, DCodeSeg::EMarkListDeps, 0);
sl@0: 		SDblQueLink* anchor=&cs_list.iA;
sl@0: 		SDblQueLink* pL=cs_list.First();
sl@0: 		for(; pL!=anchor; pL=pL->iNext)
sl@0: 			{
sl@0: 			DMemModelCodeSeg* seg = _LOFF(pL,DMemModelCodeSeg,iTempLink);
sl@0: 			if (seg->IsDll())
sl@0: 				{
sl@0: 				TInt total_data_size;
sl@0: 				TLinAddr data_base;
sl@0: 				seg->GetDataSizeAndBase(total_data_size, data_base);
sl@0: 				if (total_data_size)
sl@0: 					{
sl@0: 					TUint offset;
sl@0: 					// The instance count can be ignored as a dll data mapping is only ever 
sl@0: 					// used with a single memory object.
sl@0: 					TUint mappingInstanceCount;
sl@0: 					NKern::ThreadEnterCS();
sl@0: 					DMemoryMapping* mapping = MM::FindMappingInAddressSpace(iOsAsid, data_base, 0, offset, mappingInstanceCount);
sl@0: 					if (mapping)
sl@0: 						{
sl@0: 						DMemoryObject* memory = MM::MappingGetAndOpenMemory(mapping);
sl@0: 						if (memory)
sl@0: 							{
sl@0: 							MM::MemoryBTracePrime(memory);
sl@0: 							BTrace12(BTrace::EFlexibleMemModel,BTrace::EMemoryObjectIsDllStaticData,memory,seg,this);
sl@0: 							MM::MemoryClose(memory);
sl@0: 							}
sl@0: 						MM::MappingClose(mapping);
sl@0: 						}
sl@0: 					NKern::ThreadLeaveCS();
sl@0: 					}
sl@0: 				}
sl@0: 			}
sl@0: 		DCodeSeg::EmptyQueue(cs_list, 0);	// leave cs_list empty
sl@0: 		}
sl@0: #endif
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DMemModelProcess::NewShPool(DShPool*& aPool, TShPoolCreateInfo& aInfo)
sl@0: 	{
sl@0: 	aPool = NULL;
sl@0: 	DMemModelShPool* pC = NULL;
sl@0: 
sl@0: 	if (aInfo.iInfo.iFlags & TShPoolCreateInfo::EPageAlignedBuffer)
sl@0: 		{
sl@0: 		pC = new DMemModelAlignedShPool();
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		pC = new DMemModelNonAlignedShPool();
sl@0: 		}
sl@0: 
sl@0: 	if (pC == NULL)
sl@0: 		{
sl@0: 		return KErrNoMemory;
sl@0: 		}
sl@0: 
sl@0: 	TInt r = pC->Create(this, aInfo);
sl@0: 
sl@0: 	if (r == KErrNone)
sl@0: 		{
sl@0: 		aPool = pC;
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		pC->Close(NULL);
sl@0: 		}
sl@0: 
sl@0: 	return r;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DThread::RawRead(const TAny* aSrc, TAny* aDest, TInt aLength, TInt aFlags, TIpcExcTrap* aExcTrap)
sl@0: //
sl@0: // Read from the thread's process.
sl@0: // aSrc      Run address of memory to read
sl@0: // aDest     Current address of destination
sl@0: // aExcTrap  Exception trap object to be updated if the actual memory access is performed on other memory area than specified.
sl@0: //           It happens when  reading is performed on un-aligned memory area.
sl@0: //
sl@0: 	{
sl@0: 	(void)aExcTrap;
sl@0: 	DMemModelThread& t=*(DMemModelThread*)TheCurrentThread;
sl@0: 	DMemModelProcess* pP=(DMemModelProcess*)iOwningProcess;
sl@0: 	TLinAddr src=(TLinAddr)aSrc;
sl@0: 	TLinAddr dest=(TLinAddr)aDest;
sl@0: 	TInt result = KErrNone;
sl@0: 	TBool have_taken_fault = EFalse;
sl@0: 
sl@0: 	while (aLength)
sl@0: 		{
sl@0: 		if (iMState==EDead)
sl@0: 			{
sl@0: 			result = KErrDied;
sl@0: 			break;
sl@0: 			}
sl@0: 		TLinAddr alias_src;
sl@0: 		TUint alias_size;
sl@0: 		
sl@0: #ifdef __BROADCAST_CACHE_MAINTENANCE__
sl@0: 		TInt pagingTrap;
sl@0: 		XTRAP_PAGING_START(pagingTrap);		
sl@0: #endif
sl@0: 
sl@0: 		TInt len = have_taken_fault ? Min(aLength, KPageSize - (src & KPageMask)) : aLength;
sl@0: 		TInt alias_result=t.Alias(src, pP, len, alias_src, alias_size);
sl@0: 		if (alias_result<0)
sl@0: 			{
sl@0: 			result = KErrBadDescriptor;	// bad permissions
sl@0: 			break;
sl@0: 			}
sl@0: 		
sl@0: #ifdef __BROADCAST_CACHE_MAINTENANCE__
sl@0: 		// need to let the trap handler know where we are accessing in case we take a page fault
sl@0: 		// and the alias gets removed
sl@0: 		aExcTrap->iRemoteBase = alias_src;
sl@0: 		aExcTrap->iSize = alias_size;
sl@0: #endif
sl@0: 			
sl@0: 		__KTRACE_OPT(KTHREAD2,Kern::Printf("DThread::RawRead %08x<-%08x+%x",dest,alias_src,alias_size));
sl@0: 
sl@0: 		CHECK_PAGING_SAFE;
sl@0: 
sl@0: 		if(aFlags&KCheckLocalAddress)
sl@0: 			MM::ValidateLocalIpcAddress(dest,alias_size,ETrue);
sl@0: 		UNLOCK_USER_MEMORY();
sl@0: 		memcpy( (TAny*)dest, (const TAny*)alias_src, alias_size);
sl@0: 		LOCK_USER_MEMORY();
sl@0: 
sl@0: 		src+=alias_size;
sl@0: 		dest+=alias_size;
sl@0: 		aLength-=alias_size;
sl@0: 
sl@0: #ifdef __BROADCAST_CACHE_MAINTENANCE__
sl@0: 		XTRAP_PAGING_END;
sl@0: 		if(pagingTrap)
sl@0: 			have_taken_fault = ETrue;
sl@0: #endif
sl@0: 		}
sl@0: 	t.RemoveAlias();
sl@0: #ifdef __BROADCAST_CACHE_MAINTENANCE__
sl@0: 	t.iPagingExcTrap = NULL;  // in case we broke out of the loop and skipped XTRAP_PAGING_END
sl@0: #endif
sl@0: 
sl@0: 	return result;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: TInt DThread::RawWrite(const TAny* aDest, const TAny* aSrc, TInt aLength, TInt aFlags, DThread* /*anOriginatingThread*/, TIpcExcTrap* aExcTrap)
sl@0: //
sl@0: // Write to the thread's process.
sl@0: // aDest               Run address of memory to write
sl@0: // aSrc                Current address of destination
sl@0: // aExcTrap            Exception trap object to be updated if the actual memory access is performed on other memory area then specified.
sl@0: //                     It happens when reading is performed on un-aligned memory area.
sl@0: //
sl@0: 	{
sl@0: 	(void)aExcTrap;
sl@0: 	DMemModelThread& t=*(DMemModelThread*)TheCurrentThread;
sl@0: 	DMemModelProcess* pP=(DMemModelProcess*)iOwningProcess;
sl@0: 	TLinAddr src=(TLinAddr)aSrc;
sl@0: 	TLinAddr dest=(TLinAddr)aDest;
sl@0: 	TInt result = KErrNone;
sl@0: 	TBool have_taken_fault = EFalse;
sl@0: 
sl@0: 	while (aLength)
sl@0: 		{
sl@0: 		if (iMState==EDead)
sl@0: 			{
sl@0: 			result = KErrDied;
sl@0: 			break;
sl@0: 			}
sl@0: 		TLinAddr alias_dest;
sl@0: 		TUint alias_size;
sl@0: 
sl@0: #ifdef __BROADCAST_CACHE_MAINTENANCE__
sl@0: 		TInt pagingTrap;
sl@0: 		XTRAP_PAGING_START(pagingTrap);		
sl@0: #endif
sl@0: 		
sl@0: 		TInt len = have_taken_fault ? Min(aLength, KPageSize - (dest & KPageMask)) : aLength;
sl@0: 		TInt alias_result=t.Alias(dest, pP, len, alias_dest, alias_size);
sl@0: 		if (alias_result<0)
sl@0: 			{
sl@0: 			result = KErrBadDescriptor;	// bad permissions
sl@0: 			break;
sl@0: 			}
sl@0: 
sl@0: #ifdef __BROADCAST_CACHE_MAINTENANCE__
sl@0: 		// need to let the trap handler know where we are accessing in case we take a page fault
sl@0: 		// and the alias gets removed
sl@0: 		aExcTrap->iRemoteBase = alias_dest;
sl@0: 		aExcTrap->iSize = alias_size;
sl@0: #endif
sl@0: 
sl@0: 		__KTRACE_OPT(KTHREAD2,Kern::Printf("DThread::RawWrite %08x+%x->%08x",src,alias_size,alias_dest));
sl@0: 
sl@0: 		// Must check that it is safe to page, unless we are reading from unpaged ROM in which case
sl@0: 		// we allow it.
sl@0: 		CHECK_PAGING_SAFE_RANGE(src, aLength);
sl@0: 		CHECK_DATA_PAGING_SAFE_RANGE(dest, aLength);
sl@0: 
sl@0: 		if(aFlags&KCheckLocalAddress)
sl@0: 			MM::ValidateLocalIpcAddress(src,alias_size,EFalse);
sl@0: 		UNLOCK_USER_MEMORY();
sl@0: 		memcpy( (TAny*)alias_dest, (const TAny*)src, alias_size);
sl@0: 		LOCK_USER_MEMORY();
sl@0: 
sl@0: 		src+=alias_size;
sl@0: 		dest+=alias_size;
sl@0: 		aLength-=alias_size;
sl@0: 
sl@0: #ifdef __BROADCAST_CACHE_MAINTENANCE__
sl@0: 		XTRAP_PAGING_END;
sl@0: 		if(pagingTrap)
sl@0: 			have_taken_fault = ETrue;
sl@0: #endif
sl@0:  		}
sl@0: 	t.RemoveAlias();
sl@0: #ifdef __BROADCAST_CACHE_MAINTENANCE__
sl@0: 	t.iPagingExcTrap = NULL;  // in case we broke out of the loop and skipped XTRAP_PAGING_END
sl@0: #endif
sl@0: 
sl@0: 	return result;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: #ifndef __MARM__
sl@0: 
sl@0: TInt DThread::ReadAndParseDesHeader(const TAny* aSrc, TDesHeader& aDest)
sl@0: //
sl@0: // Read the header of a remote descriptor.
sl@0: //
sl@0: 	{
sl@0: 	static const TUint8 LengthLookup[16]={4,8,12,8,12,0,0,0,0,0,0,0,0,0,0,0};
sl@0: 
sl@0: 	CHECK_PAGING_SAFE;
sl@0: 	
sl@0: 	DMemModelThread& t=*(DMemModelThread*)TheCurrentThread;
sl@0: 	DMemModelProcess* pP=(DMemModelProcess*)iOwningProcess;
sl@0: 	TLinAddr src=(TLinAddr)aSrc;
sl@0: 
sl@0: 	__NK_ASSERT_DEBUG(t.iIpcClient==NULL);
sl@0: 	t.iIpcClient = this;
sl@0: 	
sl@0: 	TLinAddr pAlias;
sl@0: 	TUint8* pDest = (TUint8*)&aDest;
sl@0: 	TUint alias_size = 0;
sl@0: 	TInt length = 12;
sl@0: 	TInt type = KErrBadDescriptor;
sl@0: 	while (length > 0)
sl@0: 		{
sl@0: #ifdef __BROADCAST_CACHE_MAINTENANCE__
sl@0: 		TInt pagingTrap;
sl@0: 		XTRAP_PAGING_START(pagingTrap);		
sl@0: #endif
sl@0: 		
sl@0: 		if (alias_size == 0)  
sl@0: 			{
sl@0: 			// no alias present, so must create one here
sl@0: 			if (t.Alias(src, pP, length, pAlias, alias_size) != KErrNone)
sl@0: 				break;
sl@0: 			__NK_ASSERT_DEBUG(alias_size >= sizeof(TUint32));
sl@0: 			}
sl@0: 
sl@0: 		// read either the first word, or as much as aliased of the remainder
sl@0: 		TInt l = length == 12 ? sizeof(TUint32) : Min(length, alias_size);
sl@0: 		if (Kern::SafeRead((TAny*)pAlias, (TAny*)pDest, l))
sl@0: 			break;  // exception reading from user space
sl@0: 		
sl@0: 		if (length == 12)  
sl@0: 			{
sl@0: 			// we have just read the first word, so decode the descriptor type
sl@0: 			type = *(TUint32*)pDest >> KShiftDesType8;
sl@0: 			length = LengthLookup[type];
sl@0: 			// invalid descriptor type will have length 0 which will get decrease by 'l' and
sl@0: 			// terminate the loop with length < 0
sl@0: 			}
sl@0: 
sl@0: 		src += l;
sl@0: 		alias_size -= l;
sl@0: 		pAlias += l;
sl@0: 		pDest += l;
sl@0: 		length -= l;
sl@0: 		
sl@0: #ifdef __BROADCAST_CACHE_MAINTENANCE__
sl@0: 		XTRAP_PAGING_END;
sl@0: 		if (pagingTrap)
sl@0: 			alias_size = 0;  // a page fault caused the alias to be removed
sl@0: #endif
sl@0: 		}
sl@0: 	
sl@0: 	t.RemoveAlias();
sl@0: 	t.iIpcClient = NULL;
sl@0: #ifdef __BROADCAST_CACHE_MAINTENANCE__
sl@0: 	t.iPagingExcTrap = NULL;  // in case we broke out of the loop and skipped XTRAP_PAGING_END
sl@0: #endif
sl@0: 	return length == 0 ? K::ParseDesHeader(aSrc, (TRawDesHeader&)aDest, aDest) : KErrBadDescriptor;
sl@0: 	}
sl@0: 
sl@0: 
sl@0: #endif
sl@0: 
sl@0: 
sl@0: TInt DThread::PrepareMemoryForDMA(const TAny* aLinAddr, TInt aSize, TPhysAddr* aPhysicalPageList)
sl@0: 	{
sl@0: 	// not supported, new Physical Pinning APIs should be used for DMA
sl@0: 	return KErrNotSupported;
sl@0: 	}
sl@0: 
sl@0: TInt DThread::ReleaseMemoryFromDMA(const TAny* aLinAddr, TInt aSize, TPhysAddr* aPhysicalPageList)
sl@0: 	{
sl@0: 	// not supported, new Physical Pinning APIs should be used for DMA
sl@0: 	return KErrNotSupported;
sl@0: 	}
sl@0: