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// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// e32\memmodel\emul\nvram.cpp
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//
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//
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#include "plat_priv.h"
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#include <assp.h>
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#include <emulator.h>
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#include "execs.h"
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_LIT(KLitMachineConfigMutex,"MCConfMutex");
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_LIT(KLitRamDriveMutex,"RamDriveMutex");
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void K::InitNvRam()
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{
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__KTRACE_OPT(KBOOT,Kern::Printf("K::InitNvRam"));
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if (K::MutexCreate(K::MachineConfigMutex, KLitMachineConfigMutex, NULL, EFalse, KMutexOrdMachineConfig) != KErrNone)
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K::Fault(K::EMachineConfigMutexCreateFailed);
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TInt r=TInternalRamDrive::Create();
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if (r!=KErrNone)
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K::Fault(K::ERamDriveInitFailed);
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__KTRACE_OPT(KBOOT,Kern::Printf("K::InitNvRam() completed"));
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}
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// Internal RAM Drive
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// We emulated this on WINS by memory mapping a 2MB+4KB file (IRAMLDRV.BIN in the EmulatorMediaPath)
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// The word of the last page of this file contains the nominal size of the RAM drive 'chunk'
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const CHAR KIRamFileName[] = "IRAMLDRV.BIN";
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TInt TInternalRamDrive::Create()
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{
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__KTRACE_OPT(KBOOT, Kern::Printf("TInternalRamDrive::Create()"));
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// create the RAM drive mutex
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TInt r = K::MutexCreate((DMutex*&)Mutex, KLitRamDriveMutex, NULL, EFalse, KMutexOrdRamDrive);
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if (r != KErrNone)
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return r;
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__KTRACE_OPT(KBOOT, Kern::Printf("RAM drive mutex created at %08x",Mutex));
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// locate/open the RAM drive
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CHAR filename[MAX_PATH];
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strcpy(filename, Arch::TheAsic()->EmulatorMediaPath());
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if (!Emulator::CreateAllDirectories(filename))
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return Emulator::LastError();
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strcat(filename, KIRamFileName);
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PP::RamDriveFile = CreateFileA(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_ALWAYS, FILE_FLAG_RANDOM_ACCESS, NULL);
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if (PP::RamDriveFile == INVALID_HANDLE_VALUE)
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return Emulator::LastError();
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TInt filesize = GetFileSize(PP::RamDriveFile, NULL);
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TInt size = 0;
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// deal with ram drives that were created on a real device and opened in the emulator
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// and also with ones created with a different max size setting
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if ((filesize&0x1ff) == 0)
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{
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// the file is from a real internal drive on a device
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size = filesize;
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}
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else if ((filesize&0x1ff) == sizeof(TRamDriveInfo))
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{
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// created by us
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DWORD bytes;
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if (SetFilePointer(PP::RamDriveFile, -4, NULL, FILE_END) == 0xffffffff
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|| !ReadFile(PP::RamDriveFile, &size, sizeof(size), &bytes, NULL))
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return Emulator::LastError();
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}
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if (size > PP::RamDriveMaxSize)
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PP::RamDriveMaxSize = size;
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// deal with a resized ram drive file
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if (filesize != PP::RamDriveMaxSize + TInt(sizeof(TRamDriveInfo)))
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{
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DWORD bytes;
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if (SetFilePointer(PP::RamDriveFile, PP::RamDriveMaxSize, NULL, FILE_BEGIN) == 0xffffffff
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|| !WriteFile(PP::RamDriveFile, &size, sizeof(size), &bytes, NULL)
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|| !SetEndOfFile(PP::RamDriveFile))
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return Emulator::LastError();
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}
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PP::RamDriveFileMapping = CreateFileMappingA(PP::RamDriveFile, NULL, PAGE_READWRITE, 0, PP::RamDriveMaxSize + sizeof(TRamDriveInfo), NULL);
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if (PP::RamDriveFileMapping == NULL)
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return Emulator::LastError();
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PP::RamDriveStartAddress = (TLinAddr)MapViewOfFile(PP::RamDriveFileMapping, FILE_MAP_WRITE, 0, 0, PP::RamDriveMaxSize + sizeof(TRamDriveInfo));
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if (PP::RamDriveStartAddress == NULL)
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return Emulator::LastError();
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PP::RamDriveInfo = (TRamDriveInfo*)(PP::RamDriveStartAddress + PP::RamDriveMaxSize);
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TheSuperPage().iRamDriveSize = size;
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return KErrNone;
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}
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EXPORT_C TLinAddr TInternalRamDrive::Base()
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//
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// Return the Internal Ram Drive base address
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//
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{
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return PP::RamDriveStartAddress;
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}
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EXPORT_C TInt TInternalRamDrive::Size()
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//
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// Return the Internal Ram Drive size
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//
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{
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return PP::RamDriveInfo->iSize;
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}
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EXPORT_C TInt TInternalRamDrive::Adjust(TInt aNewSize)
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//
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// Adjust the size of the internal ram drive
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//
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{
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if (aNewSize<0)
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return KErrArgument;
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if (aNewSize>PP::RamDriveMaxSize)
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return KErrDiskFull;
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if (aNewSize != PP::RamDriveInfo->iSize)
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PP::RamDriveInfo->iSize = aNewSize;
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return KErrNone;
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}
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EXPORT_C void TInternalRamDrive::Wait()
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{
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Kern::MutexWait(*Mutex);
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}
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EXPORT_C void TInternalRamDrive::Signal()
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{
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Kern::MutexSignal(*Mutex);
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}
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void ExecHandler::UnlockRamDrive()
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{
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}
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EXPORT_C void TInternalRamDrive::Unlock()
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{}
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EXPORT_C void TInternalRamDrive::Lock()
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{}
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