--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kerneltest/e32test/mmu/t_mwait.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,151 @@
+// Copyright (c) 1995-2009 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:
+// e32test\mmu\t_mwait.cpp
+// Overview:
+// Memory Wait State tests
+// API Information:
+// RChunk
+// Details:
+// - Load and open the logical device driver ("D_SHADOW.LDD"). Verify
+// results.
+// - Create a user writable code chunk and copy a small "SpeedTest" function
+// into the chunk.
+// - Perform a speed test in shadow ROM and RAM and report the relative performance.
+// Platforms/Drives/Compatibility:
+// All.
+// Assumptions/Requirement/Pre-requisites:
+// Failures and causes:
+// Base Port information:
+// 
+//
+
+#include <e32test.h>
+#include "u32std.h"
+#include "d_shadow.h"
+
+RTest test(_L("T_MWAIT"));
+
+typedef TLinAddr (*TMemSpeedTest)(TInt,TInt&);
+
+extern TLinAddr MemSpeedTest(TInt /*aLoopSize*/, TInt& /*aCount*/);
+
+TMemSpeedTest TheSpeedTestFunction;
+TInt TheLoopSize;
+TInt Count;
+RSemaphore TheSemaphore;
+TUint8* RamSpeedTestCodePtr;	// speed test code will be copied here to run from RAM
+
+void CopyCode(RChunk& aC)
+	{
+	TLinAddr code_begin=(TLinAddr)&MemSpeedTest;
+	TInt dummy;
+	TLinAddr code_end=MemSpeedTest(0,dummy);
+	TInt code_size=TInt(code_end-code_begin);
+	test.Printf(_L("ROM Code start: %08x\n"), code_begin);
+	test.Printf(_L("ROM Code end  : %08x\n"), code_end);
+	test.Printf(_L("ROM Code size : %08x\n"), code_size);
+	TInt r = aC.CreateLocalCode(code_size, code_size);
+	test(r==KErrNone);
+	RamSpeedTestCodePtr = aC.Base();
+	Mem::Copy(RamSpeedTestCodePtr, (const TAny*)code_begin, code_size);
+	User::IMB_Range(RamSpeedTestCodePtr, RamSpeedTestCodePtr + code_size - 1);
+	test.Printf(_L("RAM Code base : %08x\n"), RamSpeedTestCodePtr);
+	}
+
+TInt MemSpeedTestThread(TAny*)
+	{
+	TheSemaphore.Signal();
+	(*TheSpeedTestFunction)(TheLoopSize,Count);
+	return 0;
+	}
+
+const TInt KHeapSize=4096;
+TInt KMemSpeedTestAddress = (TInt)(&MemSpeedTest);
+
+TInt DoMemSpeedTest(TBool aRam, TInt aLoopSize)
+	{
+	if (aRam)
+#ifdef __MARM__
+		TheSpeedTestFunction=(TMemSpeedTest)(RamSpeedTestCodePtr+(KMemSpeedTestAddress&1));	// add 1 if THUMB function
+#else
+		TheSpeedTestFunction=(TMemSpeedTest)RamSpeedTestCodePtr;
+#endif
+	else
+		TheSpeedTestFunction=MemSpeedTest;
+	Count=0;
+	TheLoopSize=aLoopSize;
+	RShadow sh;
+	TInt r=sh.Open();
+	test(r==KErrNone);
+	RThread t;
+	r=t.Create(_L("Speedy"),MemSpeedTestThread,KDefaultStackSize,KHeapSize,KHeapSize,NULL);
+	test(r==KErrNone);
+//	t.SetPriority(EPriorityLess);
+	sh.SetPriority(t.Handle(),25);
+	sh.SetPriority(RThread().Handle(),26);
+	TRequestStatus s;
+	t.Logon(s);
+	t.Resume();
+	TheSemaphore.Wait();
+	User::After(1000000);
+	t.Kill(0);
+	sh.SetPriority(RThread().Handle(),12);	// so thread gets cleaned up
+	User::WaitForRequest(s);
+	test(s.Int()==KErrNone);
+	test(t.ExitType()==EExitKill);
+	CLOSE_AND_WAIT(t);
+	sh.Close();
+	return Count;
+	}
+
+void DoFullTest(TBool aRam)
+	{
+	TInt count[32];
+	TInt i;
+	for (i=0; i<32; i++)
+		{
+		TInt loopSize=(i+1)*2048;
+		test.Printf(_L("Loop size %dK "),loopSize>>10);
+		count[i]=DoMemSpeedTest(aRam,loopSize);
+		TInt64 inst = TInt64(count[i]) * TInt64(loopSize>>2);
+		test.Printf(_L("%d loops %ld instructions\n"),count[i],inst);
+		}
+	test.Printf(_L("\n"));
+	}
+
+GLDEF_C TInt E32Main()
+	{
+	test.Title();
+
+	test.Start(_L("Memory Wait State tests"));
+
+	TInt r=TheSemaphore.CreateLocal(0);
+	test(r==KErrNone);
+
+	r=User::LoadLogicalDevice(_L("D_SHADOW"));
+	test(r==KErrNone || r==KErrAlreadyExists);
+
+	RChunk c;
+	CopyCode(c);
+
+	test.Next(_L("Testing ROM wait states..."));
+	DoFullTest(EFalse);
+
+	test.Next(_L("Testing RAM wait states..."));
+	DoFullTest(ETrue);
+
+	c.Close();
+	test.End();
+	return 0;
+	}