--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/nkernsmp/x86/ncutils.cpp Mon Oct 19 15:55:17 2009 +0100
@@ -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;
+ }
+