--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/nkernsmp/x86/ncutils.cpp	Thu Dec 17 09:24:54 2009 +0200
@@ -0,0 +1,363 @@
+// Copyright (c) 2006-2009 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\nkernsmp\x86\ncutils.cpp
+// 
+//
+
+#include <x86.h>
+
+extern "C" {
+extern SVariantInterfaceBlock* VIB;
+}
+
+//#define __DBG_MON_FAULT__
+//#define __RAM_LOADED_CODE__
+//#define __EARLY_DEBUG__
+void InitFpu();
+
+
+TUint32 NKern::IdleGenerationCount()
+	{
+	return TheScheduler.iIdleGenerationCount;
+	}
+
+void NKern::Idle()
+	{
+	TScheduler& s = TheScheduler;
+	TSubScheduler& ss = SubScheduler();	// OK since idle thread is locked to CPU
+	TUint32 m = ss.iCpuMask;
+
+	s.iIdleSpinLock.LockIrq();	// don't allow any more idle DFCs for now
+	TUint32 orig_cpus_not_idle = __e32_atomic_and_ord32(&s.iCpusNotIdle, ~m);
+	if (orig_cpus_not_idle == m)
+		{
+		// all CPUs idle
+		if (!s.iIdleDfcs.IsEmpty())
+			{
+			__e32_atomic_ior_ord32(&s.iCpusNotIdle, m);		// we aren't idle after all
+			s.iIdleGeneration ^= 1;
+			++s.iIdleGenerationCount;
+			s.iIdleSpillCpu = (TUint8)ss.iCpuNum;
+			ss.iDfcs.MoveFrom(&s.iIdleDfcs);
+			ss.iDfcPendingFlag = 1;
+			s.iIdleSpinLock.UnlockIrq();
+			NKern::Lock();
+			NKern::Unlock();	// process idle DFCs here
+			return;
+			}
+		}
+	s.iIdleSpinLock.UnlockOnly();	// leave interrupts disabled
+	NKIdle(0);
+	}
+
+TUint32 ContextId()
+	{
+	switch(NKern::CurrentContext())
+		{
+	case NKern::EThread:
+		return (TUint32)NKern::CurrentThread();
+	case NKern::EIDFC:
+		return 3;
+	case NKern::EInterrupt:
+		return 2;
+	default:
+		return 0;
+		}
+	}
+
+EXPORT_C TBool BTrace::Out(TUint32 a0, TUint32 a1, TUint32 a2, TUint32 a3)
+	{
+	SBTraceData& traceData = BTraceData;
+	if(!traceData.iFilter[(a0>>BTrace::ECategoryIndex*8)&0xff])
+		return FALSE;
+
+	TUint32 pc = (&a0)[-1]; // return address on X86
+	__ACQUIRE_BTRACE_LOCK();
+	TBool r = traceData.iHandler(a0,0,0,a1,a2,a3,0,pc);
+	__RELEASE_BTRACE_LOCK();
+	return r;
+	}
+
+EXPORT_C TBool BTrace::OutX(TUint32 a0, TUint32 a1, TUint32 a2, TUint32 a3)
+	{
+	SBTraceData& traceData = BTraceData;
+	if(!traceData.iFilter[(a0>>BTrace::ECategoryIndex*8)&0xff])
+		return FALSE;
+
+	TUint32 context = ContextId();
+	TUint32 pc = (&a0)[-1]; // return address on X86
+	__ACQUIRE_BTRACE_LOCK();
+	TBool r = traceData.iHandler(a0,0,context,a1,a2,a3,0,pc);
+	__RELEASE_BTRACE_LOCK();
+	return r;
+	}
+
+EXPORT_C TBool BTrace::OutN(TUint32 a0, TUint32 a1, TUint32 a2, const TAny* aData, TInt aDataSize)
+	{
+	SBTraceData& traceData = BTraceData;
+	if(!traceData.iFilter[(a0>>BTrace::ECategoryIndex*8)&0xff])
+		return FALSE;
+
+	if(TUint(aDataSize)>KMaxBTraceDataArray)
+		{
+		aDataSize = KMaxBTraceDataArray;
+		a0 |= BTrace::ERecordTruncated<<(BTrace::EFlagsIndex*8);
+		}
+	a0 += aDataSize<<(BTrace::ESizeIndex*8);
+
+	TUint32 pc = (&a0)[-1]; // return address on X86
+	TBool r;
+	__ACQUIRE_BTRACE_LOCK();
+	if (!aDataSize)
+		r = traceData.iHandler(a0,0,0,a1,a2,0,0,pc);
+	else if (aDataSize<=4)
+		r = traceData.iHandler(a0,0,0,a1,a2,*(TUint32*)aData,0,pc);
+	else
+		r = traceData.iHandler(a0,0,0,a1,a2,(TUint32)aData,0,pc);
+	__RELEASE_BTRACE_LOCK();
+	return r;
+	}
+
+EXPORT_C TBool BTrace::OutNX(TUint32 a0, TUint32 a1, TUint32 a2, const TAny* aData, TInt aDataSize)
+	{
+	SBTraceData& traceData = BTraceData;
+	if(!traceData.iFilter[(a0>>BTrace::ECategoryIndex*8)&0xff])
+		return FALSE;
+
+	if(TUint(aDataSize)>KMaxBTraceDataArray)
+		{
+		aDataSize = KMaxBTraceDataArray;
+		a0 |= BTrace::ERecordTruncated<<(BTrace::EFlagsIndex*8);
+		}
+	a0 += aDataSize<<(BTrace::ESizeIndex*8);
+
+	TUint32 context = ContextId();
+	TUint32 pc = (&a0)[-1]; // return address on X86
+	TBool r;
+	__ACQUIRE_BTRACE_LOCK();
+	if(!aDataSize)
+		r = traceData.iHandler(a0,0,context,a1,a2,0,0,pc);
+	else if(aDataSize<=4)
+		r = traceData.iHandler(a0,0,context,a1,a2,*(TUint32*)aData,0,pc);
+	else
+		r = traceData.iHandler(a0,0,context,a1,a2,(TUint32)aData,0,pc);
+	__RELEASE_BTRACE_LOCK();
+	return r;
+	}
+
+EXPORT_C TBool BTrace::OutBig(TUint32 a0, TUint32 a1, const TAny* aData, TInt aDataSize)
+	{
+	TUint32 context = ContextId();
+	TUint32 pc = (&a0)[-1]; // return address on X86
+	SBTraceData& traceData = BTraceData;
+	if(!traceData.iFilter[(a0>>BTrace::ECategoryIndex*8)&0xff])
+		return FALSE;
+	TBool r = DoOutBig(a0,a1,aData,aDataSize,context,pc);
+	return r;
+	}
+
+EXPORT_C TBool BTrace::OutFiltered(TUint32 a0, TUint32 a1, TUint32 a2, TUint32 a3)
+	{
+	SBTraceData& traceData = BTraceData;
+	if(!traceData.iFilter[(a0>>BTrace::ECategoryIndex*8)&0xff])
+		return FALSE;
+	if(!traceData.CheckFilter2(a1))
+		return FALSE;
+
+	TUint32 pc = (&a0)[-1]; // return address on X86
+	__ACQUIRE_BTRACE_LOCK();
+	TBool r = traceData.iHandler(a0,0,0,a1,a2,a3,0,pc);
+	__RELEASE_BTRACE_LOCK();
+	return r;
+	}
+
+EXPORT_C TBool BTrace::OutFilteredX(TUint32 a0, TUint32 a1, TUint32 a2, TUint32 a3)
+	{
+	SBTraceData& traceData = BTraceData;
+	if(!traceData.iFilter[(a0>>BTrace::ECategoryIndex*8)&0xff])
+		return FALSE;
+	if(!traceData.CheckFilter2(a1))
+		return FALSE;
+
+	TUint32 context = ContextId();
+	TUint32 pc = (&a0)[-1]; // return address on X86
+	__ACQUIRE_BTRACE_LOCK();
+	TBool r = traceData.iHandler(a0,0,context,a1,a2,a3,0,pc);
+	__RELEASE_BTRACE_LOCK();
+	return r;
+	}
+
+EXPORT_C TBool BTrace::OutFilteredN(TUint32 a0, TUint32 a1, TUint32 a2, const TAny* aData, TInt aDataSize)
+	{
+	SBTraceData& traceData = BTraceData;
+	if(!traceData.iFilter[(a0>>BTrace::ECategoryIndex*8)&0xff])
+		return FALSE;
+	if(!traceData.CheckFilter2(a1))
+		return FALSE;
+
+	if(TUint(aDataSize)>KMaxBTraceDataArray)
+		{
+		aDataSize = KMaxBTraceDataArray;
+		a0 |= BTrace::ERecordTruncated<<(BTrace::EFlagsIndex*8);
+		}
+	a0 += aDataSize<<(BTrace::ESizeIndex*8);
+
+	TUint32 pc = (&a0)[-1]; // return address on X86
+	TBool r;
+	__ACQUIRE_BTRACE_LOCK();
+	if(!aDataSize)
+		r = traceData.iHandler(a0,0,0,a1,a2,0,0,pc);
+	else if(aDataSize<=4)
+		r = traceData.iHandler(a0,0,0,a1,a2,*(TUint32*)aData,0,pc);
+	else
+		r = traceData.iHandler(a0,0,0,a1,a2,(TUint32)aData,0,pc);
+	__RELEASE_BTRACE_LOCK();
+	return r;
+	}
+
+EXPORT_C TBool BTrace::OutFilteredNX(TUint32 a0, TUint32 a1, TUint32 a2, const TAny* aData, TInt aDataSize)
+	{
+	SBTraceData& traceData = BTraceData;
+	if(!traceData.iFilter[(a0>>BTrace::ECategoryIndex*8)&0xff])
+		return FALSE;
+	if(!traceData.CheckFilter2(a1))
+		return FALSE;
+
+	if(TUint(aDataSize)>KMaxBTraceDataArray)
+		{
+		aDataSize = KMaxBTraceDataArray;
+		a0 |= BTrace::ERecordTruncated<<(BTrace::EFlagsIndex*8);
+		}
+	a0 += aDataSize<<(BTrace::ESizeIndex*8);
+
+	TUint32 context = ContextId();
+	TUint32 pc = (&a0)[-1]; // return address on X86
+	TBool r;
+	__ACQUIRE_BTRACE_LOCK();
+	if(!aDataSize)
+		r = traceData.iHandler(a0,0,context,a1,a2,0,0,pc);
+	else if(aDataSize<=4)
+		r = traceData.iHandler(a0,0,context,a1,a2,*(TUint32*)aData,0,pc);
+	else
+		r = traceData.iHandler(a0,0,context,a1,a2,(TUint32)aData,0,pc);
+	__RELEASE_BTRACE_LOCK();
+	return r;
+	}
+
+EXPORT_C TBool BTrace::OutFilteredBig(TUint32 a0, TUint32 a1, const TAny* aData, TInt aDataSize)
+	{
+	TUint32 context = ContextId();
+	TUint32 pc = (&a0)[-1]; // return address on X86
+	SBTraceData& traceData = BTraceData;
+	if(!traceData.iFilter[(a0>>BTrace::ECategoryIndex*8)&0xff])
+		return FALSE;
+	if(!traceData.CheckFilter2(a1))
+		return FALSE;
+	TBool r = DoOutBig(a0,a1,aData,aDataSize,context,pc);
+	return r;
+	}
+
+EXPORT_C TBool BTrace::OutFilteredPcFormatBig(TUint32 aHeader, TUint32 aModuleUid, TUint32 aPc, TUint16 aFormatId, const TAny* aData, TInt aDataSize)
+	{
+	return EFalse; //kernel side not implemented yet
+	}
+
+TInt BTraceDefaultControl(BTrace::TControl /*aFunction*/, TAny* /*aArg1*/, TAny* /*aArg2*/)
+	{
+	return KErrNotSupported;
+	}
+
+
+EXPORT_C void BTrace::SetHandlers(BTrace::THandler aNewHandler, BTrace::TControlFunction aNewControl, BTrace::THandler& aOldHandler, BTrace::TControlFunction& aOldControl)
+	{
+	BTrace::TControlFunction nc = aNewControl ? aNewControl : &BTraceDefaultControl;
+	__ACQUIRE_BTRACE_LOCK();
+	BTrace::THandler oldh = (BTrace::THandler)__e32_atomic_swp_ord_ptr(&BTraceData.iHandler, aNewHandler);
+	BTrace::TControlFunction oldc = (BTrace::TControlFunction)__e32_atomic_swp_ord_ptr(&BTraceData.iControl, nc);
+	__RELEASE_BTRACE_LOCK();
+	aOldHandler = oldh;
+	aOldControl = oldc;
+	}
+
+
+EXPORT_C TInt BTrace::SetFilter(TUint aCategory, TInt aValue)
+	{
+	if(!IsSupported(aCategory))
+		return KErrNotSupported;
+	TUint8* filter = BTraceData.iFilter+aCategory;
+	TUint oldValue = *filter;
+	if(TUint(aValue)<=1u)
+		{
+		oldValue = __e32_atomic_swp_ord8(filter, (TUint8)aValue);
+		BTraceContext4(BTrace::EMetaTrace, BTrace::EMetaTraceFilterChange, (TUint8)aCategory | (aValue<<8));
+		}
+	return oldValue;
+	}
+
+EXPORT_C SCpuIdleHandler* NKern::CpuIdleHandler()
+	{
+	return &::CpuIdleHandler;
+	}
+
+
+void NKern::Init0(TAny* a)
+	{
+	__KTRACE_OPT(KBOOT,DEBUGPRINT("VIB=%08x", a));
+	VIB = (SVariantInterfaceBlock*)a;
+	__NK_ASSERT_ALWAYS(VIB && VIB->iVer==0 && VIB->iSize==sizeof(SVariantInterfaceBlock));
+	__KTRACE_OPT(KBOOT,DEBUGPRINT("iVer=%d iSize=%d", VIB->iVer, VIB->iSize));
+	__KTRACE_OPT(KBOOT,DEBUGPRINT("iMaxCpuClock=%08x %08x", I64HIGH(VIB->iMaxCpuClock), I64LOW(VIB->iMaxCpuClock)));
+	__KTRACE_OPT(KBOOT,DEBUGPRINT("iTimestampFreq=%u", VIB->iTimestampFreq));
+	__KTRACE_OPT(KBOOT,DEBUGPRINT("iMaxTimerClock=%u", VIB->iMaxTimerClock));
+	TInt i;
+	for (i=0; i<KMaxCpus; ++i)
+		{
+		TSubScheduler& ss = TheSubSchedulers[i];
+		ss.i_TimerMultF = (TAny*)KMaxTUint32;
+		ss.i_TimerMultI = (TAny*)0x01000000u;
+		ss.i_CpuMult = (TAny*)KMaxTUint32;
+		VIB->iTimerMult[i] = (volatile STimerMult*)&ss.i_TimerMultF;
+		VIB->iCpuMult[i] = (volatile TUint32*)&ss.i_CpuMult;
+		}
+	TheScheduler.i_TimerMax = (TAny*)(VIB->iMaxTimerClock / 128);
+	InitFpu();
+	InterruptInit0();
+	}
+
+EXPORT_C TUint32 NKern::CpuTimeMeasFreq()
+	{
+	return NKern::TimestampFrequency();
+	}
+
+
+/**	Converts a time interval in microseconds to thread timeslice ticks
+
+	@param aMicroseconds time interval in microseconds.
+	@return Number of thread timeslice ticks.  Non-integral results are rounded up.
+
+ 	@pre aMicroseconds should be nonnegative
+	@pre any context
+ */
+EXPORT_C TInt NKern::TimesliceTicks(TUint32 aMicroseconds)
+	{
+	TUint32 mf32 = (TUint32)TheScheduler.i_TimerMax;
+	TUint64 mf(mf32);
+	TUint64 ticks = mf*TUint64(aMicroseconds) + UI64LIT(999999);
+	ticks /= UI64LIT(1000000);
+	if (ticks > TUint64(TInt(KMaxTInt)))
+		return KMaxTInt;
+	else
+		return (TInt)ticks;
+	}
+