// Copyright (c) 1998-2009 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\moving\mmu.cpp

// 

//

#include "memmodel.h"

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

 * "Independent" MMU code

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

void Mmu::Panic(TPanic aPanic)

	{

	Kern::Fault("MMU",aPanic);

	}

void Mmu::Init1()

	{

	__KTRACE_OPT2(KBOOT,KMMU,Kern::Printf("Mmu::Init1"));

	__ASSERT_ALWAYS(TheRomHeader().iUserDataAddress==iDllDataBase+iMaxDllDataSize,Panic(ERomUserDataAddressInvalid));

	__ASSERT_ALWAYS((TheRomHeader().iTotalUserDataSize&iPageMask)==0,Panic(ERomUserDataSizeInvalid));

	__ASSERT_ALWAYS(::RomHeaderAddress==iRomLinearBase,Panic(ERomLinearAddressInvalid));

	MmuBase::Init1();

	}

void Mmu::DoInit2()

	{

	__KTRACE_OPT2(KBOOT,KMMU,Kern::Printf("Mmu::DoInit2"));

	MM::DllDataAllocator=TBitMapAllocator::New(iMaxDllDataSize>>iPageShift, ETrue);

	__ASSERT_ALWAYS(MM::DllDataAllocator,Panic(EDllDataAllocatorCreateFailed));

	TInt rom_dll_pages=TheRomHeader().iTotalUserDataSize>>iPageShift;

	__KTRACE_OPT2(KBOOT,KMMU,Kern::Printf("DllDataAllocator @ %08x, %d ROM DLL Data Pages", MM::DllDataAllocator, rom_dll_pages));

	if (rom_dll_pages)

		MM::DllDataAllocator->Alloc(0, rom_dll_pages);	// low bit numbers represent high addresses

	}

//#ifndef __MMU_MACHINE_CODED__

TInt Mmu::PageTableId(TLinAddr aAddr)

	{

	NKern::LockSystem();

	TInt id = GetPageTableId(aAddr);

	NKern::UnlockSystem();

	return id;

	}

//#endif

void Mmu::AssignPageTable(TInt aId, TInt aUsage, TAny* aObject, TLinAddr aAddr, TPde aPdePerm)

	{

	__KTRACE_OPT(KMMU,Kern::Printf("Mmu::AssignPageTable id=%d, u=%08x, obj=%08x, addr=%08x, perm=%08x",

					aId, aUsage, aObject, aAddr, aPdePerm));

	NKern::LockSystem();

	SPageTableInfo& pti=PtInfo(aId);

	switch (aUsage)

		{

//		case SPageTableInfo::EChunk:

//			{

//			DMemModelChunk* pC=(DMemModelChunk*)aObject;

//			TUint32 ccp=K::CompressKHeapPtr(pC);

//			TUint32 offset=(aAddr-TLinAddr(pC->iBase))>>iChunkShift;

//			pti.SetChunk(ccp,offset);

//			break;

//			}

//		case SPageTableInfo::EHwChunk:

//			break;

		case SPageTableInfo::EGlobal:

			pti.SetGlobal(aAddr>>iChunkShift);

			break;

		default:

			Panic(EAssignPageTableInvalidUsage);

		}

	DoAssignPageTable(aId, aAddr, aPdePerm);

	NKern::UnlockSystem();

	}

TInt Mmu::UnassignPageTable(TLinAddr aAddr)

	{

	__KTRACE_OPT(KMMU,Kern::Printf("Mmu::UnassignPageTable addr=%08x", aAddr));

	NKern::LockSystem();

	TInt id=GetPageTableId(aAddr);

	if (id>=0)

		DoUnassignPageTable(aAddr);

	NKern::UnlockSystem();

	return id;

	}