sl@0: // Copyright (c) 1995-2009 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: // e32test\mmu\t_wbc.cpp
sl@0: // Overview:
sl@0: // Read and write RChunk data.
sl@0: // API Information:
sl@0: // RChunk
sl@0: // Details:
sl@0: // Create two local RChunk objects. Perform ReadModifyWrite, WriteOnly 
sl@0: // and ReadOnly operations on the chunks. Verify that the results are
sl@0: // as expected.
sl@0: // Platforms/Drives/Compatibility:
sl@0: // All.
sl@0: // Assumptions/Requirement/Pre-requisites:
sl@0: // Failures and causes:
sl@0: // Base Port information:
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include <e32test.h>
sl@0: #include <e32hal.h>
sl@0: #include <e32svr.h>
sl@0: 
sl@0: RTest test(_L("T_WBC"));
sl@0: 
sl@0: TUint32 ReadModifyWrite(volatile TUint32* p, TInt aNumWords)
sl@0: 	{
sl@0: 	TUint32 x=0;
sl@0: 	while(aNumWords--)
sl@0: 		{
sl@0: 		x=*p;
sl@0: 		*p++=0;
sl@0: 		}
sl@0: 	return x;
sl@0: 	}
sl@0: 
sl@0: void WriteOnly(volatile TUint32* p, TInt aNumWords)
sl@0: 	{
sl@0: 	while(aNumWords--)
sl@0: 		*p++=0xffffffff;
sl@0: 	}
sl@0: 
sl@0: TUint32 ReadOnly(volatile TUint32* p, TInt aNumWords)
sl@0: 	{
sl@0: 	TUint32 x=0;
sl@0: 	while(aNumWords--)
sl@0: 		x+=*p++;
sl@0: 	return x;
sl@0: 	}
sl@0: 
sl@0: void Dump(volatile TUint32* p, TInt aNumWords)
sl@0: 	{
sl@0: 	while(aNumWords>0)
sl@0: 		{
sl@0: 		RDebug::Print(_L("%08x: %08x %08x %08x %08x %08x %08x %08x %08x"),p,
sl@0: 			p[0],p[1],p[2],p[3],p[4],p[5],p[6],p[7]);
sl@0: 		p+=8;
sl@0: 		aNumWords-=8;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: void Verify(volatile TUint32* p, TInt aNumWords)
sl@0: 	{
sl@0: 	while(aNumWords--)
sl@0: 		test(*p++==0xffffffff);
sl@0: 	}
sl@0: 
sl@0: GLDEF_C TInt E32Main()
sl@0: 	{
sl@0: 	
sl@0: 	TInt pageSize;
sl@0: 	UserHal::PageSizeInBytes(pageSize);
sl@0: 	test.Title();
sl@0: 	test.Start(_L("Create chunk 1"));
sl@0: 	RChunk c1;
sl@0: 	TInt r=c1.CreateLocal(4*pageSize,0x100000);	// initial size 4 pages
sl@0: 	test(r==KErrNone);
sl@0: 	test.Next(_L("Create chunk 2"));
sl@0: 	RChunk c2;
sl@0: 	r=c2.CreateLocal(pageSize,0x100000);		// initial size 1 page
sl@0: 	test(r==KErrNone);
sl@0: 	test.Next(_L("Fill DCache with modified lines from chunk 1"));
sl@0: 	volatile TUint32* p=(volatile TUint32*)(c1.Base()+2*pageSize);
sl@0: 	ReadModifyWrite(p,pageSize>>1);
sl@0: 	c1.Adjust(2*pageSize);		// lose the two modified pages
sl@0: 	c2.Adjust(3*pageSize);		// map them back into chunk 2
sl@0: 	p=(volatile TUint32*)(c2.Base()+pageSize);
sl@0: 	WriteOnly(p,pageSize>>1);	// write to the modified pages at new virtual address
sl@0: 	p=(volatile TUint32*)c1.Base();
sl@0: 	ReadOnly(p,pageSize>>1);	// read two other pages (this will evict the modified lines)
sl@0: 	p=(volatile TUint32*)(c2.Base()+pageSize);
sl@0: 	Dump(p,pageSize>>1);
sl@0: 	Verify(p,pageSize>>1);
sl@0: 	test.Printf(_L("\n"));
sl@0: 	test.End();
sl@0: 	return 0;
sl@0: 	}