--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/navienginebootldr/bootloader_variant.cpp	Tue Sep 28 18:00:05 2010 +0100
@@ -0,0 +1,146 @@
+/*
+* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "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:  
+* base\bsp\hwip_nec_naviengine\ne1_tb_bootloader\bootloader_variant.cpp
+*
+*/
+
+
+
+#define FILE_ID	0x464C5348
+#include "bootldr.h"
+#include "ubootldrldd.h"
+#include <e32std.h>
+#include <e32std_private.h>
+#include <e32svr.h>
+#include <e32cons.h>
+#include <f32file.h>
+#include <hal.h>
+#include <u32hal.h>
+#include "flash_nor.h"
+#include <d32comm.h>
+
+TLinAddr ConfigBlockAddress;							// Virtual address
+
+// RAM copy of config block
+SBootloaderConfig aConfigBlock;
+
+// Invoke the flash_nor routines to read a block containing the bootloader
+// configuration.
+//
+// If the block is found to be invalid, create a new block from defaults.
+//
+GLDEF_C void ReadConfig()
+	{
+	TLinAddr FlashAddr;
+	FlashAddr = (TLinAddr) GetFlashChunk();	// Map flash
+
+	// Config block is last block of the bootloader space before a flashed image
+	ConfigBlockAddress = FlashAddr + KNORFlashMaxBootloaderSize - KFlashEraseBlockSize;
+
+	// Make sure the region is not blank and that the first word has the
+	// bootloader cfg uid on it.
+	if (!BlankCheck(ConfigBlockAddress, KConfigBlockSize) &&
+		(*(volatile TUint32*)ConfigBlockAddress == KUidUBootldrCfgMagic))
+		{
+		// Copy the config block out of flash and into ram
+		volatile TUint32* j=(volatile TUint32*)ConfigBlockAddress;
+		TUint32* dest = (TUint32 *)&aConfigBlock;
+
+		for (TUint i=0 ; i<KConfigBlockSize ; ++i, ++dest, ++j)
+			*dest=*j;
+		}
+	else
+		{
+		PrintToScreen(_L("Config area was blank, setting defaults\r\n"));
+
+		aConfigBlock.iMagic = KUidUBootldrCfgMagic;
+		aConfigBlock.iPortNumber = KUartPortNumber;
+		aConfigBlock.iBaudRate   = EBps115200;
+		aConfigBlock.iLoadDevice = ELoadDrive;
+
+		// Write the new block to flash
+		WriteConfig();
+		}
+
+	// Configure bootloader from config block
+	SerialDownloadPort = aConfigBlock.iPortNumber;
+	SerialBaud         = aConfigBlock.iBaudRate;
+	LoadDevice = (TLoadDevice)aConfigBlock.iLoadDevice;
+
+	// The H4 supports downloading images via the USB Mass Storage method. As
+	// the method of detecting a USB-MS boot is rather awkward the task is
+	// performed at a variant level.
+	if (LoadDevice==ELoadUSBMS)
+		{
+		// Read the custom restart reason from the hal
+		TInt aRestartReason;
+		TInt r = HAL::Get(HAL::ECustomRestartReason, aRestartReason);
+		if (r!=KErrNone)
+			{
+			PrintToScreen(_L("Failed to read restart reason from HAL (0x%x)"), r);
+			RDebug::Printf("Failed to read restart reason from HAL (0x%x)", r);
+			BOOT_FAULT();
+			}
+
+		// Decode the On H4 the restart reasons get shifted internally
+		if (aRestartReason & (KtRestartCustomRestartUSBLoader >> KsRestartCustomRestartReasons))
+			{
+			// In the boot scenario the indicate that the bootloader should
+			// check for an appropriate file before restarting the USB Mass
+			// Storage application.
+			LoadDevice = EBootUSBMS;
+			}
+		}
+	}
+
+
+// Write the config block back into flash
+GLDEF_C void WriteConfig()
+	{
+	aConfigBlock.iPortNumber=SerialDownloadPort;
+	aConfigBlock.iBaudRate  =SerialBaud;
+	aConfigBlock.iLoadDevice=LoadDevice;
+	// XXX Generate a checksum for the config block (excluding the checksum)
+
+	TInt r = Erase(ConfigBlockAddress, KFlashEraseBlockSize);
+	if (r!=KErrNone)
+		{
+		PrintToScreen(_L("Config block failed erase (0x%x)"), r);
+		RDebug::Printf("Config block failed erase (0x%x)", r);
+		BOOT_FAULT();
+		}
+
+	r=Write(ConfigBlockAddress, KFlashEraseBlockSize, (TUint32 *)&aConfigBlock);
+	if (r!=KErrNone)
+		{
+		PrintToScreen(_L("Config block failed write (0x%x)"), r);
+		RDebug::Printf("Config block failed write (0x%x)", r);
+		BOOT_FAULT();
+		}
+	}
+
+
+GLDEF_C void VariantInit()
+/**
+ * Can place variant code here.
+ */
+	{
+	// Set the bootloader configuration based on values saved in Flash
+	ReadConfig();
+
+	// Other variant actions e.g. print out the board information
+
+	return;
+	}