--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/memmodel/epoc/flexible/mmu/mramalloc.h	Mon Dec 21 16:14:42 2009 +0000
@@ -0,0 +1,67 @@
+// 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 "Symbian Foundation License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.symbianfoundation.org/legal/sfl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#ifndef __RAMALLOC_H__
+#define __RAMALLOC_H__
+#include <kernel/klib.h>
+
+// RAM information block passed from bootstrap to kernel.
+// Consists of two consecutive lists of SRamBank structures, each terminated by
+// a bank with iSize=0.
+// The first list specifies all available blocks of RAM in the system.
+// The second list specifies any blocks of RAM which are reserved and not
+// available for general allocation. This should not include RAM mapped by the
+// bootstrap - this will be discovered when the initial page mappings are
+// analysed.
+struct SRamInfo
+	{
+	SRamBank iBanks[1];				// extend for multiple banks
+//	SRamBank iReservedBlocks[1];
+	};
+
+const TPhysAddr NULL_PAGE=0xffffffffu;
+class DRamAllocatorBase : public DBase
+	{
+public:
+	static DRamAllocatorBase* New(const SRamInfo& aInfo, TInt aPageShift, const SRamBank* aPowerBanks=NULL);
+	static void Panic(TInt aPanic);
+	FORCE_INLINE TInt FreeRamInPages()
+		{return iTotalFreeRamPages;}
+	FORCE_INLINE TInt ClaimPhysicalRam(TPhysAddr aBase, TInt aSize)
+		{return SetPhysicalRamState(aBase,aSize,EFalse);}
+	FORCE_INLINE TInt FreePhysicalRam(TPhysAddr aBase, TInt aSize)
+		{return SetPhysicalRamState(aBase,aSize,ETrue);}
+public:
+	virtual TInt Create(const SRamInfo& aInfo, const SRamBank* aPowerBanks)=0;
+	virtual TInt MarkPageAllocated(TPhysAddr aAddr)=0;
+	virtual TInt FreeRamPage(TPhysAddr aAddr)=0;
+	virtual void FreeRamPages(TPhysAddr* aPageList, TInt aNumPages)=0;
+	virtual TInt AllocRamPages(TPhysAddr* aPageList, TInt aNumPages)=0;
+	virtual TInt AllocContiguousRam(TInt aSize, TPhysAddr& aPhysAddr, TInt aAlign=0)=0;
+	virtual TInt SetPhysicalRamState(TPhysAddr aBase, TInt aSize, TBool aState)=0;
+	virtual TUint TotalPhysicalRamPages()=0;
+protected:
+	static DRamAllocatorBase* New();
+protected:
+	TInt iPageSize;
+	TInt iPageShift;
+	TInt iTotalFreeRamPages;
+	TInt iNumPowerBlocks;
+	TInt* iPowerBlockPages;		// number of pages used in each power block
+	TUint32 iPowerState;		// mask of currently used power blocks
+	};
+
+#endif
+