static internal unsafe void StopProcessorsForGC()
{
ProcessorContext *current = Processor.GetCurrentProcessorContext();
// Set gcIpiGate to 0 for all processors
ProcessorContext *context = current;
do
{
context->gcIpiGate = 0;
context = context->nextProcessorContext;
} while (context != current);
//
// We don't want to send a broadcast to all but self on a single
// processor system since the call will fail with no receivers.
//
// Note we may have other processors that have not been enabled
// by the OS and are sitting in SIPI, and won't answer the IPI.
//
if (Processor.GetRunningProcessorCount() > 1)
{
Platform.BroadcastFixedIPI((byte)Isal.IX.EVectors.GCSynchronization, false);
}
// Wait for ackknowledgement from all CPU's but self
context = current->nextProcessorContext;
//DebugStub.WriteLine("StopProcessorsForGC: GC CPU (sender) is {0}\n",
//__arglist(current->cpuId));
while (context != current)
{
//DebugStub.WriteLine("StopProcessorsForGC: Waiting for CPU {0}\n",
//__arglist(context->cpuId));
while (context->gcIpiGate == 0)
{
;
}
//DebugStub.WriteLine("StopProcessorsForGC: CPU {0} Acknowledged\n",
//__arglist(context->cpuId));
context = context->nextProcessorContext;
}
return;
}
public static void StopApProcessors()
{
//
// Note: This should go into a HAL interface and this
// code confined to Platform.cs
//
// At this point the BSP and APs are running.
Tracing.Log(Tracing.Debug, "Processor.StopApProcessors()");
if (Processor.GetRunningProcessorCount() > 1)
{
//
// This stops them in MpExecution in a halt state with
// interrupts off.
//
Platform.BroadcastFixedIPI((byte)Isal.IX.EVectors.HaltApProcessors, true);
}
while (GetRunningProcessorCount() != 1)
{
// Thread.Sleep(100); Thread.Sleep needs NoHeapAllocation annotation
Thread.Yield();
}
//
// We must reset the AP Processors since a debug entry
// will generated a NMI which will wake them up from HALT,
// and they may start executing code again while the kernel
// is still shutting down.
//
Platform.ResetApProcessors();
DebugStub.RevertToUniprocessor();
// At this point only the BSP is running.
}