--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/drivers/crashflash/crashflashnor.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,259 @@
+// Copyright (c) 2004-2009 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\drivers\crashflashnor.cpp
+// 
+//
+
+#include <crashflashnor.h>
+
+void CrashFlashNor::StartTransaction()
+	{
+	}
+
+void CrashFlashNor::EndTransaction()
+	{
+#ifdef _CRASHLOG_COMPR
+	// Ensure any buffered data is output not all the data will be valid but 
+	// iWriteTotal should reflect this by only increasing by no of valid/buffered bytes
+	if (iWriteBufBytes)
+		{
+		DoWrite(iWriteBuf);
+		}
+#endif //_CRASHLOG_COMPR
+	}
+
+TUint CrashFlashNor::BytesWritten()
+	{
+	return iWriteTotal + iWriteBufBytes;
+	}
+
+void CrashFlashNor::SetReadPos(TUint aPos)
+	{
+	__KTRACE_OPT(KDEBUGGER,Kern::Printf("Setting read position to %d", aPos));
+	if( (aPos%sizeof(TCFIWord)) == 0)
+		{
+		iReadPos = aPos;
+		iReadBufBytes = 0;
+		iReadBuf = 0;
+		}
+	else
+		{
+		__KTRACE_OPT(KDEBUGGER,Kern::Printf("Invalid read position requested, ignoring."));
+		}
+	}
+
+
+TInt CrashFlashNor::Initialise()
+	{
+	__KTRACE_OPT(KDEBUGGER,Kern::Printf("CrashFlashNor::Initialise()"));
+	TInt ret = VariantInitialise();
+	if(ret)
+		{
+		__KTRACE_OPT(KDEBUGGER,Kern::Printf("CrashFlashNor::VariantInitialise() failed"));
+		return ret;
+		}
+	// start writing after the crash log header	
+	
+#ifdef CDS_CRASH_LOGGER
+	iWritePos = 0;
+#else
+	iWritePos = KCrashLogHeaderSize;
+#endif //CDS_CRASH_LOGGER
+	
+	SetReadPos(0);
+	iWriteTotal = 0;
+
+	return KErrNone;
+	}
+
+void CrashFlashNor::SetWritePos(TUint aPos)
+	{
+	__KTRACE_OPT(KDEBUGGER,Kern::Printf("CrashFlashNor::SetWritePos"));
+	if( (aPos%sizeof(TCFIWord)) == 0)
+		{
+		__KTRACE_OPT(KDEBUGGER,Kern::Printf("Setting write position to %d", aPos));
+		iWritePos = aPos;
+		iWriteTotal = 0;
+		iWriteBufBytes = 0;
+		iWriteBuf = 0;
+		}
+	else
+		{
+		__KTRACE_OPT(KDEBUGGER,Kern::Printf("Invalid read position requested, ignoring."));
+		}
+	}
+void CrashFlashNor::Write(const TDesC8& aDes)
+	{	
+	if (iWritePos >= KMaxCrashLogSize)
+		{
+		__KTRACE_OPT(KDEBUGGER,Kern::Printf("Write: log limit already exceeded"));
+		return;
+		}
+	
+	TInt size = aDes.Size();
+#ifndef _CRASHLOG_COMPR	
+	__KTRACE_OPT(KDEBUGGER,Kern::Printf("Write: %S, size: %d",&aDes,size));
+#else	
+	__KTRACE_OPT(KDEBUGGER,Kern::Printf("Write: writing %d bytes",size));
+#endif
+	const TUint8* ptr8 = aDes.Ptr();
+	
+	TInt truncated = EFalse;
+#ifndef _CRASHLOG_COMPR	
+	// If this will take us too close to (or past) the end of the crash log, discard the current string
+	// and write the truncation notice instead
+	if (iWritePos+size > KMaxCrashLogSize-KCrashLogTruncated().Size())
+		{
+		__KTRACE_OPT(KDEBUGGER,Kern::Printf("Write: truncating log"));
+		size = KCrashLogTruncated().Size();
+		ptr8 = KCrashLogTruncated().Ptr();
+		truncated = ETrue;
+		}
+#else
+	// If this will take us past the end of the crash log, then truncate it
+	if (iWritePos+size > KMaxCrashLogSize)
+		{
+		// no. of bytes left in crash log sector
+		TUint tmp=KMaxCrashLogSize - iWritePos;
+		__KTRACE_OPT(KDEBUGGER,Kern::Printf("Write: truncating log, limiting output to %d bytes as iWritePos=%d",tmp,iWritePos));
+		size = tmp;
+		truncated = ETrue;
+		}
+#endif
+
+	const TUint8* end = ptr8 + size;
+
+	for(; ptr8<end; ptr8++)
+		{
+		switch(iWriteBufBytes)
+			{
+			case 0:
+				iWriteBuf |= (*ptr8);
+				break;
+#if defined(TCFI_2BYTE_WORD) || defined(TCFI_4BYTE_WORD)
+			case 1:
+				iWriteBuf |= (*ptr8)<<8;
+				break;
+#if defined(TCFI_4BYTE_WORD)
+			case 2:
+				iWriteBuf |= (*ptr8)<<16;
+				break;
+			case 3:
+				iWriteBuf |= (*ptr8)<<24;
+				break;
+#endif
+#endif
+			}
+		iWriteBufBytes++;
+		if(iWriteBufBytes == (sizeof(TCFIWord)))
+			{
+			DoWrite(iWriteBuf);
+			iWritePos+=sizeof(TCFIWord);
+			iWriteTotal+=sizeof(TCFIWord);
+			iWriteBuf = 0;
+			}
+		//equiv to iWriteBufBytes%=sizeof(TCFIWord) as long as TCFIWord is
+		//a power of 2
+		iWriteBufBytes&=sizeof(TCFIWord)-1;
+		}
+	
+	// If the log was truncated, skip the write position ahead so we don't try to write any more
+	if (truncated)
+		{
+		iWritePos = KMaxCrashLogSize;
+		}
+	__KTRACE_OPT(KDEBUGGER,Kern::Printf("Write: total %d, position %d", iWriteTotal, iWritePos));
+	}
+
+void CrashFlashNor::WriteSignature(const TDesC8& aDes)
+	{
+	if (iWriteBufBytes > 0)
+		{
+		DoWrite(iWriteBuf);
+		iWriteBufBytes=0;
+		iWriteBuf=0;
+		}
+	iWritePos = 0;
+	Write(aDes);
+	}
+
+void CrashFlashNor::Read(TDes8& aDes)
+	{
+	TUint8* ptr8 = const_cast<TUint8*>(aDes.Ptr());
+	const TUint8* end = ptr8 + aDes.Size();
+	for( ; ptr8<end; ptr8++)
+		{
+		switch(iReadBufBytes)
+			{
+			case 0:
+				iReadBuf = DoRead();
+				iReadPos+=sizeof(TCFIWord);
+				*ptr8 = (TUint8)(iReadBuf);
+				break;
+#if defined(TCFI_2BYTE_WORD) || defined(TCFI_4BYTE_WORD)
+			case 1:
+				*ptr8 = (TUint8)(iReadBuf>>8);
+				break;
+#if defined(TCFI_4BYTE_WORD)
+			case 2:
+				*ptr8 = (TUint8)(iReadBuf>>16);
+				break;
+			case 3:
+				*ptr8 = (TUint8)(iReadBuf>>24);
+				break;
+#endif
+#endif
+			}
+		iReadBufBytes++;
+		//equiv to iReadBufBytes%=sizeof(TCFIWord) as long as TCFIWord is
+		//a power of 2
+		iReadBufBytes&=sizeof(TCFIWord)-1;
+		}
+	}
+
+void CrashFlashNor::EraseLogArea()
+	{
+	__KTRACE_OPT(KDEBUGGER,Kern::Printf("Erasing crash log area..."));
+	for(TUint erased = 0; erased < KMaxCrashLogSize; erased += iEraseBlockSize)
+		{		
+		DoEraseBlock(erased);
+		}
+	__KTRACE_OPT(KDEBUGGER,Kern::Printf("Finished erasing area for crash log."));	
+	}
+
+void CrashFlashNor::EraseFlashBlock(TUint aBlock)
+	{
+	__KTRACE_OPT(KDEBUGGER,Kern::Printf("CrashFlashNor::Erasing crash flash block offset [0x%X]", aBlock));
+	
+	if(aBlock%iEraseBlockSize != 0 || aBlock > KMaxCrashLogSize)
+		{
+		__KTRACE_OPT(KDEBUGGER,Kern::Printf("Invalid Block Address - Not deleting [0x%X]", aBlock));
+		return;
+		}
+	
+	DoEraseBlock(aBlock);
+	}
+
+#ifdef _CRASHLOG_COMPR	
+TUint CrashFlashNor::GetOutputLimit()
+	{
+	return KMaxCrashLogSize-KCrashLogHeaderSize;
+	}
+	
+TUint CrashFlashNor::GetLogOffset(void)
+	{
+	return 0;
+	}
+#endif
+