sl@0: // Copyright (c) 1997-2009 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: // e32\memmodel\epoc\nvram.cpp
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include "plat_priv.h"
sl@0: 
sl@0: _LIT(KLitMachineConfigMutex,"MCConfMutex");
sl@0: _LIT(KLitRamDriveMutex,"RamDriveMutex");
sl@0: _LIT(KLitTheRamDriveChunk,"TheRamDriveChunk");
sl@0: 
sl@0: void K::InitNvRam()
sl@0: 	{
sl@0: 	__KTRACE_OPT(KBOOT,Kern::Printf("InitNvRam"));
sl@0: 	TInt r=K::MutexCreate(K::MachineConfigMutex, KLitMachineConfigMutex, NULL, EFalse, KMutexOrdMachineConfig);
sl@0: 	if (r!=KErrNone)
sl@0: 		K::Fault(K::EMachineConfigMutexCreateFailed);
sl@0: 	if (K::ColdStart)
sl@0: 		{
sl@0: 		TheSuperPage().iRamDriveSize=0;
sl@0: 		TheMachineConfig().iLogSize=0;
sl@0: 		TheMachineConfig().iLogMaxSize=0;
sl@0: 		}
sl@0: #ifdef __MEMMODEL_FLEXIBLE__
sl@0: 	TheSuperPage().iRamDriveSize=0;
sl@0: #endif
sl@0: 	SChunkCreateInfo c;
sl@0: 	TInt ramDriveSize=TheSuperPage().iRamDriveSize;
sl@0: 	c.iGlobal=EFalse;
sl@0: 	c.iAtt=TChunkCreate::ENormal;
sl@0: 	c.iForceFixed=EFalse;
sl@0: #ifndef __MEMMODEL_FLEXIBLE__
sl@0: 	c.iOperations=SChunkCreateInfo::EAdjust|SChunkCreateInfo::EAdd;
sl@0: #else
sl@0: 	c.iOperations=SChunkCreateInfo::EAdjust;
sl@0: #endif
sl@0: 	c.iRunAddress=PP::RamDriveStartAddress;
sl@0: 	c.iPreallocated=ramDriveSize;
sl@0: 	c.iType=ERamDrive;
sl@0: 	c.iMaxSize=PP::RamDriveMaxSize;
sl@0: 	c.iInitialBottom=0;
sl@0: 	c.iInitialTop=0;
sl@0: 	c.iName.Set(KLitTheRamDriveChunk);
sl@0: 	c.iOwner=K::TheKernelProcess;
sl@0: 	TLinAddr runAddr;
sl@0: 	r=K::TheKernelProcess->NewChunk((DChunk*&)PP::TheRamDriveChunk,c,runAddr);
sl@0: 	if (r!=KErrNone)
sl@0: 		K::Fault(K::ERamDriveChunkCreateFailed);
sl@0: 	__KTRACE_OPT(KBOOT,Kern::Printf("Ram Drive size = %08x", ramDriveSize));
sl@0: 	r=TInternalRamDrive::Create();
sl@0: 	if (r!=KErrNone)
sl@0: 		K::Fault(K::ERamDriveInitFailed);
sl@0: 
sl@0: 	__KTRACE_OPT(KBOOT,Kern::Printf("K::InitNvRam() completed"));
sl@0: 	}
sl@0: 
sl@0: TInt TInternalRamDrive::Create()
sl@0: 	{
sl@0: 	__KTRACE_OPT(KBOOT,Kern::Printf("TInternalRamDrive::Create()"));
sl@0: 
sl@0: 	// create the RAM drive mutex
sl@0: 	TInt r=K::MutexCreate((DMutex*&)Mutex, KLitRamDriveMutex, NULL, EFalse, KMutexOrdRamDrive);
sl@0: 	if (r!=KErrNone)
sl@0: 		return r;
sl@0: 	__KTRACE_OPT(KBOOT,Kern::Printf("RAM drive mutex created at %08x",Mutex));
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: #ifndef __MEMMODEL_FLEXIBLE__
sl@0: EXPORT_C TLinAddr TInternalRamDrive::Base()
sl@0: //
sl@0: // Return the Internal Ram Drive base address
sl@0: //
sl@0: 	{
sl@0: 	return (TLinAddr)PP::TheRamDriveChunk->Base(&Kern::CurrentProcess());
sl@0: 	}
sl@0: #endif
sl@0: 
sl@0: EXPORT_C TInt TInternalRamDrive::Size()
sl@0: //
sl@0: // Return the Internal Ram Drive size
sl@0: //
sl@0: 	{
sl@0: 	return TheSuperPage().iRamDriveSize;
sl@0: 	}
sl@0: 
sl@0: EXPORT_C TInt TInternalRamDrive::Adjust(TInt aNewSize)
sl@0: //
sl@0: // Adjust the size of the internal ram drive
sl@0: //
sl@0: 	{
sl@0: 	// If we are shrinking the drive, change the size now in case the
sl@0: 	// machine is reset half way through the chunk adjust
sl@0: 	if (aNewSize<0)
sl@0: 		return KErrArgument;
sl@0: 	if (aNewSize<TheSuperPage().iRamDriveSize)
sl@0: 		{
sl@0: 		TheSuperPage().iRamDriveSize=aNewSize;
sl@0: 		return PP::TheRamDriveChunk->Adjust(aNewSize);
sl@0: 		}
sl@0: 
sl@0: 	// If we are growing the drive, change the size after the adjustment is complete
sl@0: 	// If a reset occurs in the middle of the adjust, the ram drive will be
sl@0: 	// restored to its original state before the adjustment.
sl@0: 	else if (aNewSize>TheSuperPage().iRamDriveSize)
sl@0: 		{
sl@0: 		if (aNewSize>PP::RamDriveMaxSize)
sl@0: 			return KErrDiskFull;
sl@0: 		TInt r=PP::TheRamDriveChunk->Adjust(aNewSize);
sl@0: 		if (r==KErrNoMemory)
sl@0: 			return(KErrDiskFull);
sl@0: 		else if(r==KErrNone)
sl@0: 			TheSuperPage().iRamDriveSize=aNewSize;
sl@0: 		return(r);
sl@0: 		}
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: EXPORT_C void TInternalRamDrive::Wait()
sl@0: 	{
sl@0: 	Kern::MutexWait(*Mutex);
sl@0: 	UNLOCK_USER_MEMORY();
sl@0: 	}
sl@0: 
sl@0: EXPORT_C void TInternalRamDrive::Signal()
sl@0: 	{
sl@0: 	LOCK_USER_MEMORY();
sl@0: 	Kern::MutexSignal(*Mutex);
sl@0: 	}