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\emul\nvram.cpp
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include "plat_priv.h"
sl@0: #include <assp.h>
sl@0: #include <emulator.h>
sl@0: #include "execs.h"
sl@0: 
sl@0: _LIT(KLitMachineConfigMutex,"MCConfMutex");
sl@0: _LIT(KLitRamDriveMutex,"RamDriveMutex");
sl@0: 
sl@0: void K::InitNvRam()
sl@0: 	{
sl@0: 	__KTRACE_OPT(KBOOT,Kern::Printf("K::InitNvRam"));
sl@0: 	if (K::MutexCreate(K::MachineConfigMutex, KLitMachineConfigMutex, NULL, EFalse, KMutexOrdMachineConfig) != KErrNone)
sl@0: 		K::Fault(K::EMachineConfigMutexCreateFailed);
sl@0: 
sl@0: 	TInt 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: // Internal RAM Drive
sl@0: 
sl@0: // We emulated this on WINS by memory mapping a 2MB+4KB file (IRAMLDRV.BIN in the EmulatorMediaPath)
sl@0: // The word of the last page of this file contains the nominal size of the RAM drive 'chunk'
sl@0: 
sl@0: const CHAR KIRamFileName[] = "IRAMLDRV.BIN";
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: 
sl@0: 	// locate/open the RAM drive
sl@0: 	CHAR filename[MAX_PATH];
sl@0: 	strcpy(filename, Arch::TheAsic()->EmulatorMediaPath());
sl@0: 	if (!Emulator::CreateAllDirectories(filename))
sl@0: 		return Emulator::LastError();
sl@0: 	strcat(filename, KIRamFileName);
sl@0: 	PP::RamDriveFile = CreateFileA(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_ALWAYS, FILE_FLAG_RANDOM_ACCESS, NULL);
sl@0: 	if (PP::RamDriveFile == INVALID_HANDLE_VALUE)
sl@0: 		return Emulator::LastError();
sl@0: 	TInt filesize = GetFileSize(PP::RamDriveFile, NULL);
sl@0: 	TInt size = 0;
sl@0: 
sl@0: 	// deal with ram drives that were created on a real device and opened in the emulator
sl@0: 	// and also with ones created with a different max size setting
sl@0: 
sl@0: 	if ((filesize&0x1ff) == 0)
sl@0: 		{
sl@0: 		// the file is from a real internal drive on a device
sl@0: 		size = filesize;
sl@0: 		}
sl@0: 	else if ((filesize&0x1ff) == sizeof(TRamDriveInfo))
sl@0: 		{
sl@0: 		// created by us
sl@0: 		DWORD bytes;
sl@0: 		if (SetFilePointer(PP::RamDriveFile, -4, NULL, FILE_END) == 0xffffffff
sl@0: 			|| !ReadFile(PP::RamDriveFile, &size, sizeof(size), &bytes, NULL))
sl@0: 			return Emulator::LastError();
sl@0: 		}
sl@0: 	if (size > PP::RamDriveMaxSize)
sl@0: 		PP::RamDriveMaxSize = size;
sl@0: 
sl@0: 	// deal with a resized ram drive file
sl@0: 	if (filesize != PP::RamDriveMaxSize + TInt(sizeof(TRamDriveInfo)))
sl@0: 		{
sl@0: 		DWORD bytes;
sl@0: 		if (SetFilePointer(PP::RamDriveFile, PP::RamDriveMaxSize, NULL, FILE_BEGIN) == 0xffffffff
sl@0: 			|| !WriteFile(PP::RamDriveFile, &size, sizeof(size), &bytes, NULL)
sl@0: 			|| !SetEndOfFile(PP::RamDriveFile))
sl@0: 			return Emulator::LastError();
sl@0: 		}
sl@0: 
sl@0: 	PP::RamDriveFileMapping = CreateFileMappingA(PP::RamDriveFile, NULL, PAGE_READWRITE, 0, PP::RamDriveMaxSize + sizeof(TRamDriveInfo), NULL);
sl@0: 	if (PP::RamDriveFileMapping == NULL)
sl@0: 		return Emulator::LastError();
sl@0: 
sl@0: 	PP::RamDriveStartAddress = (TLinAddr)MapViewOfFile(PP::RamDriveFileMapping, FILE_MAP_WRITE, 0, 0, PP::RamDriveMaxSize + sizeof(TRamDriveInfo));
sl@0: 	if (PP::RamDriveStartAddress == NULL)
sl@0: 		return Emulator::LastError();
sl@0: 
sl@0: 	PP::RamDriveInfo = (TRamDriveInfo*)(PP::RamDriveStartAddress + PP::RamDriveMaxSize);
sl@0: 
sl@0: 	TheSuperPage().iRamDriveSize = size;
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
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 PP::RamDriveStartAddress;
sl@0: 	}
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 PP::RamDriveInfo->iSize;
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 (aNewSize<0)
sl@0: 		return KErrArgument;
sl@0: 	if (aNewSize>PP::RamDriveMaxSize)
sl@0: 		return KErrDiskFull;
sl@0: 	if (aNewSize != PP::RamDriveInfo->iSize)
sl@0: 		PP::RamDriveInfo->iSize = aNewSize;
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: EXPORT_C void TInternalRamDrive::Wait()
sl@0: 	{
sl@0: 	Kern::MutexWait(*Mutex);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C void TInternalRamDrive::Signal()
sl@0: 	{
sl@0: 	Kern::MutexSignal(*Mutex);
sl@0: 	}
sl@0: 
sl@0: void ExecHandler::UnlockRamDrive()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: EXPORT_C void TInternalRamDrive::Unlock()
sl@0: 	{}
sl@0: 
sl@0: EXPORT_C void TInternalRamDrive::Lock()
sl@0: 	{}
sl@0: