--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/memmodel/epoc/nvram.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,139 @@
+// Copyright (c) 1997-2009 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\nvram.cpp
+// 
+//
+
+#include "plat_priv.h"
+
+_LIT(KLitMachineConfigMutex,"MCConfMutex");
+_LIT(KLitRamDriveMutex,"RamDriveMutex");
+_LIT(KLitTheRamDriveChunk,"TheRamDriveChunk");
+
+void K::InitNvRam()
+	{
+	__KTRACE_OPT(KBOOT,Kern::Printf("InitNvRam"));
+	TInt r=K::MutexCreate(K::MachineConfigMutex, KLitMachineConfigMutex, NULL, EFalse, KMutexOrdMachineConfig);
+	if (r!=KErrNone)
+		K::Fault(K::EMachineConfigMutexCreateFailed);
+	if (K::ColdStart)
+		{
+		TheSuperPage().iRamDriveSize=0;
+		TheMachineConfig().iLogSize=0;
+		TheMachineConfig().iLogMaxSize=0;
+		}
+#ifdef __MEMMODEL_FLEXIBLE__
+	TheSuperPage().iRamDriveSize=0;
+#endif
+	SChunkCreateInfo c;
+	TInt ramDriveSize=TheSuperPage().iRamDriveSize;
+	c.iGlobal=EFalse;
+	c.iAtt=TChunkCreate::ENormal;
+	c.iForceFixed=EFalse;
+#ifndef __MEMMODEL_FLEXIBLE__
+	c.iOperations=SChunkCreateInfo::EAdjust|SChunkCreateInfo::EAdd;
+#else
+	c.iOperations=SChunkCreateInfo::EAdjust;
+#endif
+	c.iRunAddress=PP::RamDriveStartAddress;
+	c.iPreallocated=ramDriveSize;
+	c.iType=ERamDrive;
+	c.iMaxSize=PP::RamDriveMaxSize;
+	c.iInitialBottom=0;
+	c.iInitialTop=0;
+	c.iName.Set(KLitTheRamDriveChunk);
+	c.iOwner=K::TheKernelProcess;
+	TLinAddr runAddr;
+	r=K::TheKernelProcess->NewChunk((DChunk*&)PP::TheRamDriveChunk,c,runAddr);
+	if (r!=KErrNone)
+		K::Fault(K::ERamDriveChunkCreateFailed);
+	__KTRACE_OPT(KBOOT,Kern::Printf("Ram Drive size = %08x", ramDriveSize));
+	r=TInternalRamDrive::Create();
+	if (r!=KErrNone)
+		K::Fault(K::ERamDriveInitFailed);
+
+	__KTRACE_OPT(KBOOT,Kern::Printf("K::InitNvRam() completed"));
+	}
+
+TInt TInternalRamDrive::Create()
+	{
+	__KTRACE_OPT(KBOOT,Kern::Printf("TInternalRamDrive::Create()"));
+
+	// create the RAM drive mutex
+	TInt r=K::MutexCreate((DMutex*&)Mutex, KLitRamDriveMutex, NULL, EFalse, KMutexOrdRamDrive);
+	if (r!=KErrNone)
+		return r;
+	__KTRACE_OPT(KBOOT,Kern::Printf("RAM drive mutex created at %08x",Mutex));
+	return KErrNone;
+	}
+
+#ifndef __MEMMODEL_FLEXIBLE__
+EXPORT_C TLinAddr TInternalRamDrive::Base()
+//
+// Return the Internal Ram Drive base address
+//
+	{
+	return (TLinAddr)PP::TheRamDriveChunk->Base(&Kern::CurrentProcess());
+	}
+#endif
+
+EXPORT_C TInt TInternalRamDrive::Size()
+//
+// Return the Internal Ram Drive size
+//
+	{
+	return TheSuperPage().iRamDriveSize;
+	}
+
+EXPORT_C TInt TInternalRamDrive::Adjust(TInt aNewSize)
+//
+// Adjust the size of the internal ram drive
+//
+	{
+	// If we are shrinking the drive, change the size now in case the
+	// machine is reset half way through the chunk adjust
+	if (aNewSize<0)
+		return KErrArgument;
+	if (aNewSize<TheSuperPage().iRamDriveSize)
+		{
+		TheSuperPage().iRamDriveSize=aNewSize;
+		return PP::TheRamDriveChunk->Adjust(aNewSize);
+		}
+
+	// If we are growing the drive, change the size after the adjustment is complete
+	// If a reset occurs in the middle of the adjust, the ram drive will be
+	// restored to its original state before the adjustment.
+	else if (aNewSize>TheSuperPage().iRamDriveSize)
+		{
+		if (aNewSize>PP::RamDriveMaxSize)
+			return KErrDiskFull;
+		TInt r=PP::TheRamDriveChunk->Adjust(aNewSize);
+		if (r==KErrNoMemory)
+			return(KErrDiskFull);
+		else if(r==KErrNone)
+			TheSuperPage().iRamDriveSize=aNewSize;
+		return(r);
+		}
+	return KErrNone;
+	}
+
+EXPORT_C void TInternalRamDrive::Wait()
+	{
+	Kern::MutexWait(*Mutex);
+	}
+
+EXPORT_C void TInternalRamDrive::Signal()
+	{
+	Kern::MutexSignal(*Mutex);
+	}