reactos/ntoskrnl/mm/ARM3/mmsup.c

/*
 * PROJECT:         ReactOS Kernel
 * LICENSE:         BSD - See COPYING.ARM in the top level directory
 * FILE:            ntoskrnl/mm/ARM3/mmsup.c
 * PURPOSE:         ARM Memory Manager Support Routines
 * PROGRAMMERS:     ReactOS Portable Systems Group
 */

/* INCLUDES *******************************************************************/

#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>

#line 15 "ARM³::MMSUP"
#define MODULE_INVOLVED_IN_ARM3
#include "../ARM3/miarm.h"

/* PUBLIC FUNCTIONS ***********************************************************/

/*
 * @unimplemented
 */
NTSTATUS
NTAPI
MmMapUserAddressesToPage(IN PVOID BaseAddress,
                         IN SIZE_T NumberOfBytes,
                         IN PVOID PageAddress)
{
    UNIMPLEMENTED;
    return STATUS_NOT_IMPLEMENTED;
}

/*
 * @unimplemented
 */
NTSTATUS
NTAPI
MmAdjustWorkingSetSize(IN SIZE_T WorkingSetMinimumInBytes,
                       IN SIZE_T WorkingSetMaximumInBytes,
                       IN ULONG SystemCache,
                       IN BOOLEAN IncreaseOkay)
{
    UNIMPLEMENTED;
    return STATUS_NOT_IMPLEMENTED;
}

/*
 * @unimplemented
 */
BOOLEAN
NTAPI
MmSetAddressRangeModified(IN PVOID Address,
                          IN SIZE_T Length)
{
   UNIMPLEMENTED;
   return FALSE;
}

/*
 * @implemented
 */
BOOLEAN
NTAPI
MmIsAddressValid(IN PVOID VirtualAddress)
{
#if _MI_PAGING_LEVELS >= 4
    /* Check if the PXE is valid */
    if (MiAddressToPxe(VirtualAddress)->u.Hard.Valid == 0) return FALSE;
#endif

#if _MI_PAGING_LEVELS >= 3
    /* Check if the PPE is valid */
    if (MiAddressToPpe(VirtualAddress)->u.Hard.Valid == 0) return FALSE;
#endif

#if _MI_PAGING_LEVELS >= 2
    /* Check if the PDE is valid */
    if (MiAddressToPde(VirtualAddress)->u.Hard.Valid == 0) return FALSE;
#endif

    /* Check if the PTE is valid */
    if (MiAddressToPte(VirtualAddress)->u.Hard.Valid == 0) return FALSE;

    /* This address is valid now, but it will only stay so if the caller holds
     * the PFN lock */
    return TRUE;
}

/*
 * @unimplemented
 */
BOOLEAN
NTAPI
MmIsNonPagedSystemAddressValid(IN PVOID VirtualAddress)
{
    DPRINT1("WARNING: %s returns bogus result\n", __FUNCTION__);
    return MmIsAddressValid(VirtualAddress);
}

/*
 * @unimplemented
 */
NTSTATUS
NTAPI
MmSetBankedSection(IN HANDLE ProcessHandle,
                   IN PVOID VirtualAddress,
                   IN ULONG BankLength,
                   IN BOOLEAN ReadWriteBank,
                   IN PVOID BankRoutine,
                   IN PVOID Context)
{
    UNIMPLEMENTED;
    return STATUS_NOT_IMPLEMENTED;
}

/*
 * @implemented
 */
BOOLEAN
NTAPI
MmIsRecursiveIoFault(VOID)
{
    PETHREAD Thread = PsGetCurrentThread();
    
    //
    // If any of these is true, this is a recursive fault
    //
    return ((Thread->DisablePageFaultClustering) | (Thread->ForwardClusterOnly));
}

/*
 * @implemented
 */
BOOLEAN
NTAPI
MmIsThisAnNtAsSystem(VOID)
{
    /* Return if this is a server system */
    return MmProductType;
}

/*
 * @implemented
 */
MM_SYSTEMSIZE
NTAPI
MmQuerySystemSize(VOID)
{
    /* Return the low, medium or high memory system type */
    return MmSystemSize;
}

/* EOF */