mirror of
https://github.com/reactos/reactos.git
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111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/mm/powerpc/pfault.c
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* PURPOSE: Paging file functions
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*
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* PROGRAMMERS: David Welch (welch@mcmail.com)
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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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#include <ppcmmu/mmu.h>
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/* EXTERNS *******************************************************************/
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NTSTATUS
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NTAPI
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MmNotPresentFault(KPROCESSOR_MODE Mode,
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ULONG_PTR Address,
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BOOLEAN FromMdl);
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extern ULONG KiKernelTrapHandler(PKTRAP_FRAME Tf, ULONG ExceptionNr, PVOID Cr2);
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/* FUNCTIONS *****************************************************************/
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VOID MmpPpcTrapFrameToTrapFrame(ppc_trap_frame_t *frame, PKTRAP_FRAME Tf)
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{
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RtlCopyMemory(&Tf->Gpr0, frame->gpr, 12 * sizeof(ULONG));
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Tf->Lr = frame->lr;
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Tf->Cr = frame->cr;
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Tf->Ctr = frame->ctr;
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Tf->Xer = frame->xer;
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Tf->Iar = frame->srr0;
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Tf->Msr = frame->srr1 & 0xffff;
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Tf->Dr0 = frame->dar;
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Tf->Dr1 = frame->dsisr;
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}
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void CopyFrame(int *oldframe, int *ourframe)
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{
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int i;
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for (i = 0; i < sizeof(ppc_trap_frame_t) / sizeof(int); i++)
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{
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ourframe[i] = GetPhys((int)&oldframe[i]);
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}
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}
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void KiPageFaultHandler(int trap, ppc_trap_frame_t *frame)
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{
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NTSTATUS Status = STATUS_SUCCESS;
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KPROCESSOR_MODE Mode;
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EXCEPTION_RECORD Er;
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KTRAP_FRAME Tf;
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BOOLEAN AccessFault = !!(frame->dsisr & (1<<28));
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vaddr_t VirtualAddr;
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PVOID TrapInfo = NULL;
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/* get the faulting address */
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if (trap == 4) /* Instruction miss */
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VirtualAddr = frame->srr0;
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else /* Data miss */
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VirtualAddr = frame->dar;
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/* MSR_PR */
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Mode = frame->srr1 & 0x4000 ? UserMode : KernelMode;
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DPRINT("Page Fault at %08x\n", frame->srr0);
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/* handle the fault */
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if (AccessFault)
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{
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Status = MmAccessFault(Mode, (PVOID)VirtualAddr, FALSE, TrapInfo);
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}
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else
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{
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Status = MmNotPresentFault(Mode, VirtualAddr, FALSE);
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}
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if (NT_SUCCESS(Status))
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{
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MmuCallbackRet();
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}
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if (KeGetCurrentThread()->ApcState.UserApcPending)
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{
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KIRQL oldIrql;
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KeRaiseIrql(APC_LEVEL, &oldIrql);
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KiDeliverApc(UserMode, NULL, NULL);
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KeLowerIrql(oldIrql);
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}
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MmpPpcTrapFrameToTrapFrame(frame, &Tf);
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Er.ExceptionCode = STATUS_ACCESS_VIOLATION;
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Er.ExceptionFlags = 0;
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Er.ExceptionRecord = NULL;
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Er.ExceptionAddress = (PVOID)frame->srr0;
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Er.NumberParameters = 2;
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Er.ExceptionInformation[0] = AccessFault;
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Er.ExceptionInformation[1] = VirtualAddr;
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/* FIXME: Which exceptions are noncontinuable? */
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Er.ExceptionFlags = 0;
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KiDispatchException(&Er, 0, &Tf, Mode, TRUE);
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MmuCallbackRet();
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}
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