internal void SetKeepAliveInterrupt()
{
ClockLogger.AddEntry(0, rps, this);
PitWrite(PitMaxWrite);
ClockLogger.AddEntry(1, rps, this);
this.interruptPending = true;
}
public override void ClearInterrupt()
{
#if RTC_NO_GO
DebugStub.Print("Unwanted RTC interrupt! (b = {0})\n",
__arglist(ReadRtc(DS1287_B)));
return;
#endif // RTC_NO_GO
byte status = ReadRtc(DS1287_C);
if ((status & 0x40) != 0x40)
{
// We may get Update-Ended interrupts even though we've
// not requested them.
pic.AckIrq(irq);
return;
}
ClockLogger.AddEntry(4, rps, timer);
rps.pitLastClock = timer.Timer2Read();
rps.upTime += InterruptGapTicks;
ClockLogger.AddEntry(5, rps, timer);
irqCount++;
if (timer.InterruptPending == false)
{
// This is to keep time progressing if the user has
// not set an interrupt
timer.SetKeepAliveInterrupt();
}
pic.AckIrq(irq);
// Invalidate TSC snapshot to force clock synchronization
this.tscSnapshotValid = false;
}
private long GetKernelTicksFromHW()
{
bool iflag = Processor.DisableInterrupts();
try {
ClockLogger.AddEntry(100, rps, timer);
long r = rps.GetKernelTicks(timer.Timer2Read());
return(r);
}
finally {
Processor.RestoreInterrupts(iflag);
}
}
public override void SetNextInterrupt(TimeSpan delta)
{
DebugStub.Assert(Processor.InterruptsDisabled());
DebugStub.Assert(delta >= minInterruptInterval);
DebugStub.Assert(delta <= maxInterruptInterval);
#if TIMER_NO_GO
return;
#endif
ClockLogger.AddEntry(2, rps, this, delta.Ticks);
PitWrite(TimeSpanTicksToPitTicks((int)delta.Ticks));
this.interruptPending = true;
ClockLogger.AddEntry(3, rps, this, delta.Ticks);
}
public override void ClearInterrupt()
{
#if VERBOSE
Tracing.Log(Tracing.Debug, "Timer.ClearInterrupt()");
#endif
#if TIMER_NO_GO
Tracing.Log(Tracing.Notice, "Unwanted timer interrupt!");
#endif // TIMER_NO_GO
ClockLogger.AddEntry(10, rps, this);
long currentTime = rps.GetKernelTicks(Timer2Read());
this.interruptPending = false;
irqCount++;
ClockLogger.AddEntry(11, rps, this);
pic.AckIrq(irq);
}
