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/*++
Copyright (c) 1993 Microsoft Corporation
Module Name:
xxmpipi.c
Abstract:
This module implements PowerPC specific MP routine.
Author:
Pat Carr 15-Aug-1994
Based on MIPS version authored by:
David N. Cutler 24-Apr-1993
Environment:
Kernel mode only.
Revision History:
--*/
#include "ki.h"
//
// Define forward reference function prototypes.
//
VOID
KiRestoreProcessorControlState (
IN PKPROCESSOR_STATE ProcessorState
);
VOID
KiSaveProcessorControlState (
IN PKPROCESSOR_STATE ProcessorState
);
VOID
KiRestoreProcessorState (
IN PKTRAP_FRAME TrapFrame,
IN PKEXCEPTION_FRAME ExceptionFrame
)
/*++
Routine Description:
This function moves processor register state from the current
processor context structure in the processor block to the
specified trap and exception frames.
Arguments:
TrapFrame - Supplies a pointer to a trap frame.
ExceptionFrame - Supplies a pointer to an exception frame.
Return Value:
None.
--*/
{
PKPRCB Prcb;
//
// Get the address of the current processor block and move the
// specified register state from the processor context structure
// to the specified trap and exception frames
//
Prcb = KeGetCurrentPrcb();
#if !defined(NT_UP)
KeContextToKframes(TrapFrame,
ExceptionFrame,
&Prcb->ProcessorState.ContextFrame,
CONTEXT_FULL,
KernelMode);
#endif
//
// Restore the current processor control state.
// Currently, the primary use is to allow the kernel
// debugger to set hardware debug registers. Still
// investigating whether this is required for MP systems.
//
KiRestoreProcessorControlState(&Prcb->ProcessorState);
return;
}
VOID
KiSaveProcessorState (
IN PKTRAP_FRAME TrapFrame,
IN PKEXCEPTION_FRAME ExceptionFrame
)
/*++
Routine Description:
This function moves processor register state from the specified trap
and exception frames to the processor context structure in the current
processor block.
Arguments:
TrapFrame - Supplies a pointer to a trap frame.
ExceptionFrame - Supplies a pointer to an exception frame.
Return Value:
None.
--*/
{
PKPRCB Prcb;
//
// Get the address of the current processor block and move the
// specified register state from specified trap and exception
// frames to the current processor context structure.
//
Prcb = KeGetCurrentPrcb();
Prcb->ProcessorState.ContextFrame.ContextFlags = CONTEXT_FULL |
CONTEXT_DEBUG_REGISTERS;
KeContextFromKframes(TrapFrame,
ExceptionFrame,
&Prcb->ProcessorState.ContextFrame);
//
// Save the current processor control state.
//
Prcb->ProcessorState.SpecialRegisters.KernelDr6 =
Prcb->ProcessorState.ContextFrame.Dr6;
KiSaveProcessorControlState(&Prcb->ProcessorState);
return;
}
BOOLEAN
KiIpiServiceRoutine (
IN PKTRAP_FRAME TrapFrame,
IN PKEXCEPTION_FRAME ExceptionFrame
)
/*++
Routine Description:
This function is called at IPI_LEVEL to process any outstanding
interprocess request for the current processor.
Arguments:
TrapFrame - Supplies a pointer to a trap frame.
ExceptionFrame - Supplies a pointer to an exception frame
Return Value:
A value of TRUE is returned, if one of more requests were service.
Otherwise, FALSE is returned.
--*/
{
ULONG RequestSummary;
//
// Process any outstanding interprocessor requests.
//
RequestSummary = KiIpiProcessRequests();
//
// If freeze is requested, then freeze target execution.
//
if ((RequestSummary & IPI_FREEZE) != 0) {
KiFreezeTargetExecution(TrapFrame, ExceptionFrame);
}
//
// Return whether any requests were processed.
//
return (RequestSummary & ~IPI_FREEZE) != 0;
}
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