reactos/ntoskrnl/mm/ARM3/mmsup.c

   1 /*
   2  * PROJECT:         ReactOS Kernel
   3  * LICENSE:         BSD - See COPYING.ARM in the top level directory
   4  * FILE:            ntoskrnl/mm/ARM3/mmsup.c
   5  * PURPOSE:         ARM Memory Manager Support Routines
   6  * PROGRAMMERS:     ReactOS Portable Systems Group
   7  */
   8
   9 /* INCLUDES *******************************************************************/
  10
  11 #include <ntoskrnl.h>
  12 #define NDEBUG
  13 #include <debug.h>
  14
  15 #line 15 "ARM³::MMSUP"
  16 #define MODULE_INVOLVED_IN_ARM3
  17 #include "../ARM3/miarm.h"
  18
  19 /* PUBLIC FUNCTIONS ***********************************************************/
  20
  21 /*
  22  * @unimplemented
  23  */
  24 NTSTATUS
  25 NTAPI
  26 MmMapUserAddressesToPage(IN PVOID BaseAddress,
  27                          IN SIZE_T NumberOfBytes,
  28                          IN PVOID PageAddress)
  29 {
  30     UNIMPLEMENTED;
  31     return STATUS_NOT_IMPLEMENTED;
  32 }
  33
  34 /*
  35  * @unimplemented
  36  */
  37 NTSTATUS
  38 NTAPI
  39 MmAdjustWorkingSetSize(IN SIZE_T WorkingSetMinimumInBytes,
  40                        IN SIZE_T WorkingSetMaximumInBytes,
  41                        IN ULONG SystemCache,
  42                        IN BOOLEAN IncreaseOkay)
  43 {
  44     UNIMPLEMENTED;
  45     return STATUS_NOT_IMPLEMENTED;
  46 }
  47
  48 /*
  49  * @unimplemented
  50  */
  51 BOOLEAN
  52 NTAPI
  53 MmSetAddressRangeModified(IN PVOID Address,
  54                           IN SIZE_T Length)
  55 {
  56    UNIMPLEMENTED;
  57    return FALSE;
  58 }
  59
  60 /*
  61  * @implemented
  62  */
  63 BOOLEAN
  64 NTAPI
  65 MmIsAddressValid(IN PVOID VirtualAddress)
  66 {
  67     //
  68     // Just check the Valid bit in the Address' PDE and PTE
  69     //
  70     if ((MiAddressToPde(VirtualAddress)->u.Hard.Valid == 0) ||
  71         (MiAddressToPte(VirtualAddress)->u.Hard.Valid == 0))
  72     {
  73         //
  74         // Attempting to access this page is guranteed to result in a page fault
  75         //
  76         return FALSE;
  77     }
  78
  79     //
  80     // This address is valid now, but it will only stay so if the caller holds
  81     // the PFN lock
  82     //
  83     return TRUE;
  84 }
  85
  86 /*
  87  * @unimplemented
  88  */
  89 BOOLEAN
  90 NTAPI
  91 MmIsNonPagedSystemAddressValid(IN PVOID VirtualAddress)
  92 {
  93     DPRINT1("WARNING: %s returns bogus result\n", __FUNCTION__);
  94     return MmIsAddressValid(VirtualAddress);
  95 }
  96
  97 /*
  98  * @unimplemented
  99  */
 100 NTSTATUS
 101 NTAPI
 102 MmSetBankedSection(IN HANDLE ProcessHandle,
 103                    IN PVOID VirtualAddress,
 104                    IN ULONG BankLength,
 105                    IN BOOLEAN ReadWriteBank,
 106                    IN PVOID BankRoutine,
 107                    IN PVOID Context)
 108 {
 109     UNIMPLEMENTED;
 110     return STATUS_NOT_IMPLEMENTED;
 111 }
 112
 113 /*
 114  * @implemented
 115  */
 116 BOOLEAN
 117 NTAPI
 118 MmIsRecursiveIoFault(VOID)
 119 {
 120     PETHREAD Thread = PsGetCurrentThread();
 121
 122     //
 123     // If any of these is true, this is a recursive fault
 124     //
 125     return ((Thread->DisablePageFaultClustering) | (Thread->ForwardClusterOnly));
 126 }
 127
 128 /*
 129  * @implemented
 130  */
 131 BOOLEAN
 132 NTAPI
 133 MmIsThisAnNtAsSystem(VOID)
 134 {
 135     /* Return if this is a server system */
 136     return MmProductType;
 137 }
 138
 139 /*
 140  * @implemented
 141  */
 142 MM_SYSTEMSIZE
 143 NTAPI
 144 MmQuerySystemSize(VOID)
 145 {
 146     /* Return the low, medium or high memory system type */
 147     return MmSystemSize;
 148 }
 149
 150 /* EOF */