iosup.c

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/*++

Copyright (c) 1989  Microsoft Corporation

Module Name:

   iosup.c

Abstract:

    This module contains routines which provide support for the I/O system.

Author:

    Lou Perazzoli (loup) 25-Apr-1989
    Landy Wang (landyw) 02-June-1997

Revision History:

--*/

#include "mi.h"

#undef MmIsRecursiveIoFault

PFN_NUMBER MmSystemLockPagesCount;

extern ULONG MmTotalSystemDriverPages;

BOOLEAN
MmIsRecursiveIoFault(
    VOID
    );

PVOID
MiAllocateContiguousMemory (
    IN SIZE_T NumberOfBytes,
    IN PFN_NUMBER LowestAcceptablePfn,
    IN PFN_NUMBER HighestAcceptablePfn,
    IN PFN_NUMBER BoundaryPfn,
    PVOID CallingAddress
    );

PVOID
MiMapLockedPagesInUserSpace (
     IN PMDL MemoryDescriptorList,
     IN PVOID StartingVa,
     IN MEMORY_CACHING_TYPE CacheType,
     IN PVOID BaseVa
     );

VOID
MiUnmapLockedPagesInUserSpace (
     IN PVOID BaseAddress,
     IN PMDL MemoryDescriptorList
     );

LOGICAL
MiGetSystemPteAvailability (
    IN ULONG NumberOfPtes,
    IN MM_PAGE_PRIORITY Priority
    );

VOID
MiAddMdlTracker (
    IN PMDL MemoryDescriptorList,
    IN PVOID CallingAddress,
    IN PVOID CallersCaller,
    IN PFN_NUMBER NumberOfPagesToLock,
    IN ULONG Who
    );

typedef struct _PTE_TRACKER {
    LIST_ENTRY ListEntry;
    PMDL Mdl;
    PFN_NUMBER Count;
    PVOID SystemVa;
    PVOID StartVa;
    ULONG Offset;
    ULONG Length;
    ULONG_PTR Page;
    PVOID CallingAddress;
    PVOID CallersCaller;
    PVOID PteAddress;
} PTE_TRACKER, *PPTE_TRACKER;

typedef struct _SYSPTES_HEADER {
    LIST_ENTRY ListHead;
    PFN_NUMBER Count;
} SYSPTES_HEADER, *PSYSPTES_HEADER;

LOGICAL MmTrackPtes = FALSE;
BOOLEAN MiTrackPtesAborted = FALSE;
SYSPTES_HEADER