mirror of
https://github.com/reactos/reactos.git
synced 2024-08-30 23:28:58 +00:00
273 lines
7 KiB
C
273 lines
7 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: ntoskrnl/ke/ipi.c
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* PURPOSE: Inter-Processor Packet Interface
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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/* GLOBALS *******************************************************************/
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extern KSPIN_LOCK KiReverseStallIpiLock;
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/* PRIVATE FUNCTIONS *********************************************************/
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VOID
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NTAPI
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KiIpiGenericCallTarget(IN PKIPI_CONTEXT PacketContext,
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IN PVOID BroadcastFunction,
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IN PVOID Argument,
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IN PVOID Count)
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{
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/* FIXME: TODO */
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ASSERTMSG("Not yet implemented\n", FALSE);
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}
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VOID
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FASTCALL
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KiIpiSend(IN KAFFINITY TargetProcessors,
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IN ULONG IpiRequest)
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{
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/* FIXME: TODO */
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ASSERTMSG("Not yet implemented\n", FALSE);
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}
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VOID
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NTAPI
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KiIpiSendPacket(IN KAFFINITY TargetProcessors,
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IN PKIPI_WORKER WorkerFunction,
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IN PKIPI_BROADCAST_WORKER BroadcastFunction,
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IN ULONG_PTR Context,
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IN PULONG Count)
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{
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/* FIXME: TODO */
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ASSERTMSG("Not yet implemented\n", FALSE);
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}
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VOID
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FASTCALL
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KiIpiSignalPacketDone(IN PKIPI_CONTEXT PacketContext)
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{
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/* FIXME: TODO */
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ASSERTMSG("Not yet implemented\n", FALSE);
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}
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VOID
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FASTCALL
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KiIpiSignalPacketDoneAndStall(IN PKIPI_CONTEXT PacketContext,
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IN volatile PULONG ReverseStall)
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{
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/* FIXME: TODO */
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ASSERTMSG("Not yet implemented\n", FALSE);
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}
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#if 0
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VOID
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NTAPI
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KiIpiSendRequest(IN KAFFINITY TargetSet,
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IN ULONG IpiRequest)
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{
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#ifdef CONFIG_SMP
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LONG i;
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PKPRCB Prcb;
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KAFFINITY Current;
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for (i = 0, Current = 1; i < KeNumberProcessors; i++, Current <<= 1)
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{
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if (TargetSet & Current)
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{
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/* Get the PRCB for this CPU */
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Prcb = KiProcessorBlock[i];
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InterlockedBitTestAndSet((PLONG)&Prcb->IpiFrozen, IpiRequest);
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HalRequestIpi(i);
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}
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}
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#endif
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}
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VOID
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NTAPI
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KiIpiSendPacket(IN KAFFINITY TargetSet,
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IN PKIPI_BROADCAST_WORKER WorkerRoutine,
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IN ULONG_PTR Argument,
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IN ULONG Count,
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IN BOOLEAN Synchronize)
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{
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#ifdef CONFIG_SMP
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KAFFINITY Processor;
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LONG i;
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PKPRCB Prcb, CurrentPrcb;
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KIRQL oldIrql;
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ASSERT(KeGetCurrentIrql() == SYNCH_LEVEL);
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CurrentPrcb = KeGetCurrentPrcb();
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(void)InterlockedExchangeUL(&CurrentPrcb->TargetSet, TargetSet);
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(void)InterlockedExchangeUL(&CurrentPrcb->WorkerRoutine, (ULONG_PTR)WorkerRoutine);
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(void)InterlockedExchangePointer(&CurrentPrcb->CurrentPacket[0], Argument);
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(void)InterlockedExchangeUL(&CurrentPrcb->CurrentPacket[1], Count);
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(void)InterlockedExchangeUL(&CurrentPrcb->CurrentPacket[2], Synchronize ? 1 : 0);
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for (i = 0, Processor = 1; i < KeNumberProcessors; i++, Processor <<= 1)
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{
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if (TargetSet & Processor)
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{
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Prcb = KiProcessorBlock[i];
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while (0 != InterlockedCompareExchangeUL(&Prcb->SignalDone, (LONG)CurrentPrcb, 0));
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InterlockedBitTestAndSet((PLONG)&Prcb->IpiFrozen, IPI_SYNCH_REQUEST);
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if (Processor != CurrentPrcb->SetMember)
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{
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HalRequestIpi(i);
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}
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}
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}
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if (TargetSet & CurrentPrcb->SetMember)
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{
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KeRaiseIrql(IPI_LEVEL, &oldIrql);
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KiIpiServiceRoutine(NULL, NULL);
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KeLowerIrql(oldIrql);
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}
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#endif
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}
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#endif
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/* PUBLIC FUNCTIONS **********************************************************/
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/*
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* @implemented
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*/
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BOOLEAN
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NTAPI
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KiIpiServiceRoutine(IN PKTRAP_FRAME TrapFrame,
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IN PKEXCEPTION_FRAME ExceptionFrame)
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{
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#ifdef CONFIG_SMP
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PKPRCB Prcb;
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ASSERT(KeGetCurrentIrql() == IPI_LEVEL);
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Prcb = KeGetCurrentPrcb();
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if (InterlockedBitTestAndReset((PLONG)&Prcb->IpiFrozen, IPI_APC))
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{
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HalRequestSoftwareInterrupt(APC_LEVEL);
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}
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if (InterlockedBitTestAndReset((PLONG)&Prcb->IpiFrozen, IPI_DPC))
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{
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Prcb->DpcInterruptRequested = TRUE;
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HalRequestSoftwareInterrupt(DISPATCH_LEVEL);
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}
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if (InterlockedBitTestAndReset((PLONG)&Prcb->IpiFrozen, IPI_SYNCH_REQUEST))
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{
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#ifdef _M_ARM
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DbgBreakPoint();
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#else
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(void)InterlockedDecrementUL(&Prcb->SignalDone->CurrentPacket[1]);
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if (InterlockedCompareExchangeUL(&Prcb->SignalDone->CurrentPacket[2], 0, 0))
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{
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while (0 != InterlockedCompareExchangeUL(&Prcb->SignalDone->CurrentPacket[1], 0, 0));
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}
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((VOID (NTAPI*)(PVOID))(Prcb->SignalDone->WorkerRoutine))(Prcb->SignalDone->CurrentPacket[0]);
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InterlockedBitTestAndReset((PLONG)&Prcb->SignalDone->TargetSet, KeGetCurrentProcessorNumber());
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if (InterlockedCompareExchangeUL(&Prcb->SignalDone->CurrentPacket[2], 0, 0))
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{
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while (0 != InterlockedCompareExchangeUL(&Prcb->SignalDone->TargetSet, 0, 0));
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}
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(void)InterlockedExchangePointer((PVOID*)&Prcb->SignalDone, NULL);
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#endif // _M_ARM
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}
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#endif
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return TRUE;
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}
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/*
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* @implemented
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*/
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ULONG_PTR
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NTAPI
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KeIpiGenericCall(IN PKIPI_BROADCAST_WORKER Function,
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IN ULONG_PTR Argument)
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{
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ULONG_PTR Status;
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KIRQL OldIrql, OldIrql2;
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#ifdef CONFIG_SMP
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KAFFINITY Affinity;
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ULONG Count;
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PKPRCB Prcb = KeGetCurrentPrcb();
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#endif
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/* Raise to DPC level if required */
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OldIrql = KeGetCurrentIrql();
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if (OldIrql < DISPATCH_LEVEL) KeRaiseIrql(DISPATCH_LEVEL, &OldIrql);
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#ifdef CONFIG_SMP
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/* Get current processor count and affinity */
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Count = KeNumberProcessors;
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Affinity = KeActiveProcessors;
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/* Exclude ourselves */
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Affinity &= ~Prcb->SetMember;
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#endif
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/* Acquire the IPI lock */
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KeAcquireSpinLockAtDpcLevel(&KiReverseStallIpiLock);
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#ifdef CONFIG_SMP
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/* Make sure this is MP */
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if (Affinity)
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{
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/* Send an IPI */
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KiIpiSendPacket(Affinity,
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KiIpiGenericCallTarget,
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Function,
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Argument,
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&Count);
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/* Spin until the other processors are ready */
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while (Count != 1)
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{
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YieldProcessor();
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KeMemoryBarrierWithoutFence();
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}
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}
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#endif
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/* Raise to IPI level */
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KeRaiseIrql(IPI_LEVEL, &OldIrql2);
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#ifdef CONFIG_SMP
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/* Let the other processors know it is time */
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Count = 0;
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#endif
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/* Call the function */
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Status = Function(Argument);
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#ifdef CONFIG_SMP
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/* If this is MP, wait for the other processors to finish */
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if (Affinity)
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{
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/* Sanity check */
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ASSERT(Prcb == KeGetCurrentPrcb());
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/* FIXME: TODO */
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ASSERTMSG("Not yet implemented\n", FALSE);
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}
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#endif
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/* Release the lock */
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KeReleaseSpinLockFromDpcLevel(&KiReverseStallIpiLock);
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/* Lower IRQL back */
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KeLowerIrql(OldIrql);
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return Status;
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}
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