--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kerneltest/e32test/benchmark/bm_mcot_pdd.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,241 @@
+// Copyright (c) 2003-2009 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\benchmark\bm_mcot_pdd.cpp
+// PDD to provide OS timer services to benchmark programs
+// 
+//
+
+#include <kernel/kernel.h>
+#include <cotulla.h>
+
+
+#include "k32bm.h"
+
+class DBMMcotDevice : public DPhysicalDevice
+	{
+public:
+	DBMMcotDevice();
+	virtual TInt Install();
+	virtual void GetCaps(TDes8& aDes) const;
+	virtual TInt Create(DBase*& aChannel, TInt aUnit, const TDesC8* anInfo, const TVersion& aVer);
+	virtual TInt Validate(TInt aUnit, const TDesC8* anInfo, const TVersion& aVer);
+	};
+
+class DBMMcotChannel : public DBMPChannel
+	{
+public:
+	DBMMcotChannel();
+	~DBMMcotChannel();
+
+	// Report timing spec
+	virtual TBMTicks TimerPeriod();
+	// Get current OST tick time
+	virtual TBMTicks TimerStamp();
+	// Tick/nS conversions
+	virtual TBMNs TimerTicksToNs(TBMTicks);
+	virtual TBMTicks TimerNsToTicks(TBMNs);
+	// Pass in client ISRs to invoke 
+	virtual TInt BindInterrupt(MBMIsr*);
+	virtual TInt BindInterrupt(MBMInterruptLatencyIsr*);
+	// Invoke an ISR 
+	virtual void RequestInterrupt();
+	virtual void CancelInterrupt();
+
+private:
+
+	// Attach to OST interrupt
+	TInt BindInterrupt();
+
+	static const TInt		KBMMcotInterruptDelayTicks = KHwOscFreqHz / 1000;	// ie. delay ~ 1 ms timer tick!
+	static const TBMTicks	KBMMcotPeriod = (((TBMTicks) 1) << 32);
+	static const TBMNs		KBMMcotNsPerTick = (1000*1000*1000) / KHwOscFreqHz;
+	
+	// Real ISR (calls out to client)
+	static void Isr(TAny*);
+	
+	MBMIsr*						iIsr;
+	MBMInterruptLatencyIsr*		iInterruptLatencyIsr;
+	};
+
+// Standard boiler plate PDD factory object 
+
+DECLARE_STANDARD_PDD()
+//
+// Create a new device
+//
+	{
+	__ASSERT_CRITICAL;
+	return new DBMMcotDevice;
+	}
+
+DBMMcotDevice::DBMMcotDevice()
+//
+// Constructor
+//
+	{
+	//iUnitsMask=0;
+	iVersion = TVersion(1,0,1);
+	}
+
+TInt DBMMcotDevice::Install()
+//
+// Install the device driver.
+//
+	{
+	TInt r = SetName(&KBMPdName);
+	return r;
+	}
+
+void DBMMcotDevice::GetCaps(TDes8& aDes) const
+//
+// Return the Comm capabilities.
+//
+	{
+	}
+
+TInt DBMMcotDevice::Create(DBase*& aChannel, TInt /*aUnit*/, const TDesC8* /*aInfo*/, const TVersion& /*aVer*/)
+//
+// Create a channel on the device.
+//
+	{
+	__ASSERT_CRITICAL;
+	aChannel = new DBMMcotChannel;
+	return aChannel?KErrNone:KErrNoMemory;
+	}
+
+TInt DBMMcotDevice::Validate(TInt /*aUnit*/, const TDesC8* /*anInfo*/, const TVersion& aVer)
+	{
+	if (!Kern::QueryVersionSupported(iVersion,aVer))
+		{
+		return KErrNotSupported;
+		}
+	return KErrNone;
+	}
+
+// Actual device channel functions, called by LDD
+
+// Clear saved ISR members
+DBMMcotChannel::DBMMcotChannel()
+	{
+	//	iIsr = NULL;
+	//	iInterruptLatencyIsr = NULL;
+	}
+
+// If we ever initialised the timers to generate ISRs, clear 
+DBMMcotChannel::~DBMMcotChannel()
+	{
+	if (iIsr || iInterruptLatencyIsr)
+		{
+		TCotulla::DisableOstInterrupt(KHwOstMatchGeneral);
+		TCotulla::SetOstMatchEOI(KHwOstMatchGeneral);
+		Interrupt::Disable(KIntIdOstMatchGeneral);
+		TCotulla::ModifyIntLevels(KHtIntsOstMatchGeneral,0);
+		Interrupt::Unbind(KIntIdOstMatchGeneral);
+		}
+	}
+
+TBMTicks DBMMcotChannel::TimerPeriod()
+	{
+	return KBMMcotPeriod;
+	}
+
+// Read OST and return tick count
+TBMTicks DBMMcotChannel::TimerStamp()
+	{
+	return TUint(TCotulla::OstData());
+	}
+
+TBMNs DBMMcotChannel::TimerTicksToNs(TBMTicks ticks)
+	{
+	return ticks * KBMMcotNsPerTick;
+	}
+
+TBMTicks DBMMcotChannel::TimerNsToTicks(TBMNs ns)
+	{
+	return ns / KBMMcotNsPerTick;
+	}
+
+// Actual ISR called when benchmark timer fires
+void DBMMcotChannel::Isr(TAny* ptr)
+	{
+	DBMMcotChannel* mCh = (DBMMcotChannel*) ptr;
+	BM_ASSERT(mCh->iIsr || mCh->iInterruptLatencyIsr);
+	if (mCh->iIsr)
+		{
+		// Call the handler with the current OST time
+		mCh->iIsr->Isr(TUint(TCotulla::OstData()));
+		}
+	else
+		{
+		// Call the handler with the difference between NOW and the time the match timer was set for
+		// ie. the latency between the timer interrupt set and when it was called.
+		mCh->iInterruptLatencyIsr->InterruptLatencyIsr(TCotulla::OstData() - TCotulla::OstMatch(KHwOstMatchGeneral));
+		}
+	TCotulla::DisableOstInterrupt(KHwOstMatchGeneral);
+	TCotulla::SetOstMatchEOI(KHwOstMatchGeneral);
+	}
+
+
+// Bind the OST match interrupt to a FIQ ISR - it will interrupt running IRQ service
+// routines. 
+TInt DBMMcotChannel::BindInterrupt()
+	{
+	TInt r = Interrupt::Bind(KIntIdOstMatchGeneral, Isr, this);
+	if (r != KErrNone)
+		{
+		return r;
+		}
+	TCotulla::ModifyIntLevels(0, KHtIntsOstMatchGeneral);	// route new timer interrupt to FIQ
+	TCotulla::SetOstMatchEOI(KHwOstMatchGeneral);
+	Interrupt::Enable(KIntIdOstMatchGeneral);
+	return KErrNone;
+	}
+
+// NB! Only one of these is ever used per channel opening, ie. the 
+// channel must be closed and re-opened between installing client ISR
+TInt DBMMcotChannel::BindInterrupt(MBMIsr* aIsr)
+	{
+	BM_ASSERT(!iIsr);
+	BM_ASSERT(!iInterruptLatencyIsr);
+	iIsr = aIsr;
+	return BindInterrupt();
+	}
+
+TInt DBMMcotChannel::BindInterrupt(MBMInterruptLatencyIsr* aIsr)
+	{
+	BM_ASSERT(!iIsr);
+	BM_ASSERT(!iInterruptLatencyIsr);
+	iInterruptLatencyIsr = aIsr;
+	return BindInterrupt();
+	}
+
+// Called by client to request an interrupt (ISR/latency ISR) invocation in ~1mS.
+void DBMMcotChannel::RequestInterrupt()
+	{
+	BM_ASSERT(iIsr || iInterruptLatencyIsr);
+	TCotulla::SetOstMatch(TCotulla::OstData()+KBMMcotInterruptDelayTicks,KHwOstMatchGeneral);
+	TCotulla::SetOstMatchEOI(KHwOstMatchGeneral);
+	TCotulla::EnableOstInterrupt(KHwOstMatchGeneral);
+	}
+
+// Called to cancel if client dies/killed after ISR scheduled ???
+void DBMMcotChannel::CancelInterrupt()
+	{	
+	if (iIsr || iInterruptLatencyIsr)
+		{
+		TCotulla::DisableOstInterrupt(KHwOstMatchGeneral);
+		TCotulla::SetOstMatchEOI(KHwOstMatchGeneral);
+		}
+	}
+