ntoskrnl/include/internal/i386/mm.h

   1 /*
   2  * kernel internal memory management definitions for x86
   3  */
   4 #pragma once
   5
   6 #ifdef _PAE_
   7 #define _MI_PAGING_LEVELS 3
   8 #define _MI_HAS_NO_EXECUTE 1
   9 #else
  10 #define _MI_PAGING_LEVELS 2
  11 #define _MI_NO_EXECUTE 0
  12 #endif
  13
  14 /* Memory layout base addresses */
  15 #define MI_USER_PROBE_ADDRESS                   (PVOID)0x7FFF0000
  16 #define MI_DEFAULT_SYSTEM_RANGE_START           (PVOID)0x80000000
  17 #ifndef PAE
  18 #define HYPER_SPACE                                    0xC0400000
  19 #define HYPER_SPACE_END                                0xC07FFFFF
  20 #else
  21 #define HYPER_SPACE                                    0xC0800000
  22 #define HYPER_SPACE_END                                0xC0BFFFFF
  23 #endif
  24 #define MI_SYSTEM_CACHE_WS_START                (PVOID)0xC0C00000
  25 #define MI_SYSTEM_CACHE_START                   (PVOID)0xC1000000
  26 #define MI_PAGED_POOL_START                     (PVOID)0xE1000000
  27 #define MI_NONPAGED_POOL_END                    (PVOID)0xFFBE0000
  28 #define MI_DEBUG_MAPPING                        (PVOID)0xFFBFF000
  29 #define MI_HIGHEST_SYSTEM_ADDRESS               (PVOID)0xFFFFFFFF
  30
  31 /* FIXME: These are different for PAE */
  32 #define PTE_BASE    0xC0000000
  33 #define PDE_BASE    0xC0300000
  34 #define PDE_TOP     0xC0300FFF
  35 #define PTE_TOP     0xC03FFFFF
  36
  37 #define PTE_PER_PAGE 0x400
  38 #define PDE_PER_PAGE 0x400
  39 #define PPE_PER_PAGE 1
  40
  41 /* Misc address definitions */
  42 #define MI_SYSTEM_PTE_BASE                      (PVOID)MiAddressToPte(NULL)
  43 #define MM_HIGHEST_VAD_ADDRESS \
  44     (PVOID)((ULONG_PTR)MM_HIGHEST_USER_ADDRESS - (16 * PAGE_SIZE))
  45 #define MI_MAPPING_RANGE_START              (ULONG)HYPER_SPACE
  46 #define MI_MAPPING_RANGE_END                (MI_MAPPING_RANGE_START + \
  47                                                   MI_HYPERSPACE_PTES * PAGE_SIZE)
  48 #define MI_DUMMY_PTE                        (PMMPTE)((ULONG_PTR)MI_MAPPING_RANGE_END + \
  49                                                   PAGE_SIZE)
  50 #define MI_VAD_BITMAP                       (PMMPTE)((ULONG_PTR)MI_DUMMY_PTE + \
  51                                                   PAGE_SIZE)
  52 #define MI_WORKING_SET_LIST                 (PMMPTE)((ULONG_PTR)MI_VAD_BITMAP + \
  53                                                   PAGE_SIZE)
  54
  55 /* Memory sizes */
  56 #define MI_MIN_PAGES_FOR_NONPAGED_POOL_TUNING   ((255 * _1MB) >> PAGE_SHIFT)
  57 #define MI_MIN_PAGES_FOR_SYSPTE_TUNING          ((19 * _1MB) >> PAGE_SHIFT)
  58 #define MI_MIN_PAGES_FOR_SYSPTE_BOOST           ((32 * _1MB) >> PAGE_SHIFT)
  59 #define MI_MIN_PAGES_FOR_SYSPTE_BOOST_BOOST     ((256 * _1MB) >> PAGE_SHIFT)
  60 #define MI_MIN_INIT_PAGED_POOLSIZE              (32 * _1MB)
  61 #define MI_MAX_INIT_NONPAGED_POOL_SIZE          (128 * _1MB)
  62 #define MI_MAX_NONPAGED_POOL_SIZE               (128 * _1MB)
  63 #define MI_SYSTEM_VIEW_SIZE                     (32 * _1MB)
  64 #define MI_SESSION_VIEW_SIZE                    (48 * _1MB)
  65 #define MI_SESSION_POOL_SIZE                    (16 * _1MB)
  66 #define MI_SESSION_IMAGE_SIZE                   (8 * _1MB)
  67 #define MI_SESSION_WORKING_SET_SIZE             (4 * _1MB)
  68 #define MI_SESSION_SIZE                         (MI_SESSION_VIEW_SIZE + \
  69                                                  MI_SESSION_POOL_SIZE + \
  70                                                  MI_SESSION_IMAGE_SIZE + \
  71                                                  MI_SESSION_WORKING_SET_SIZE)
  72 #define MI_MIN_ALLOCATION_FRAGMENT              (4 * _1KB)
  73 #define MI_ALLOCATION_FRAGMENT                  (64 * _1KB)
  74 #define MI_MAX_ALLOCATION_FRAGMENT              (2  * _1MB)
  75
  76 /* Misc constants */
  77 #define MM_PTE_SOFTWARE_PROTECTION_BITS         5
  78 #define MI_MIN_SECONDARY_COLORS                 8
  79 #define MI_SECONDARY_COLORS                     64
  80 #define MI_MAX_SECONDARY_COLORS                 1024
  81 #define MI_MAX_FREE_PAGE_LISTS                  4
  82 #define MI_HYPERSPACE_PTES                     (256 - 1)
  83 #define MI_ZERO_PTES                           (32)
  84 #define MI_MAX_ZERO_BITS                        21
  85 #define SESSION_POOL_LOOKASIDES                 26
  86
  87 /* MMPTE related defines */
  88 #define MM_EMPTY_PTE_LIST  ((ULONG)0xFFFFF)
  89 #define MM_EMPTY_LIST  ((ULONG_PTR)-1)
  90
  91
  92 /* Easy accessing PFN in PTE */
  93 #define PFN_FROM_PTE(v) ((v)->u.Hard.PageFrameNumber)
  94
  95 /* Macros for portable PTE modification */
  96 #define MI_MAKE_DIRTY_PAGE(x)      ((x)->u.Hard.Dirty = 1)
  97 #define MI_MAKE_CLEAN_PAGE(x)      ((x)->u.Hard.Dirty = 0)
  98 #define MI_MAKE_ACCESSED_PAGE(x)   ((x)->u.Hard.Accessed = 1)
  99 #define MI_PAGE_DISABLE_CACHE(x)   ((x)->u.Hard.CacheDisable = 1)
 100 #define MI_PAGE_WRITE_THROUGH(x)   ((x)->u.Hard.WriteThrough = 1)
 101 #define MI_PAGE_WRITE_COMBINED(x)  ((x)->u.Hard.WriteThrough = 0)
 102 #define MI_IS_PAGE_LARGE(x)        ((x)->u.Hard.LargePage == 1)
 103 #if !defined(CONFIG_SMP)
 104 #define MI_IS_PAGE_WRITEABLE(x)    ((x)->u.Hard.Write == 1)
 105 #else
 106 #define MI_IS_PAGE_WRITEABLE(x)    ((x)->u.Hard.Writable == 1)
 107 #endif
 108 #define MI_IS_PAGE_COPY_ON_WRITE(x)((x)->u.Hard.CopyOnWrite == 1)
 109 #ifdef _PAE_
 110 #define MI_IS_PAGE_EXECUTABLE(x)   ((x)->u.Hard.NoExecute == 0)
 111 #else
 112 #define MI_IS_PAGE_EXECUTABLE(x)   TRUE
 113 #endif
 114 #define MI_IS_PAGE_DIRTY(x)        ((x)->u.Hard.Dirty == 1)
 115 #define MI_MAKE_OWNER_PAGE(x)      ((x)->u.Hard.Owner = 1)
 116 #if !defined(CONFIG_SMP)
 117 #define MI_MAKE_WRITE_PAGE(x)      ((x)->u.Hard.Write = 1)
 118 #else
 119 #define MI_MAKE_WRITE_PAGE(x)      ((x)->u.Hard.Writable = 1)
 120 #endif
 121
 122
 123 /* Macros to identify the page fault reason from the error code */
 124 #define MI_IS_NOT_PRESENT_FAULT(FaultCode) !BooleanFlagOn(FaultCode, 0x1)
 125 #define MI_IS_WRITE_ACCESS(FaultCode) BooleanFlagOn(FaultCode, 0x2)
 126 #define MI_IS_INSTRUCTION_FETCH(FaultCode) BooleanFlagOn(FaultCode, 0x10)
 127
 128 /* On x86, these two are the same */
 129 #define MI_WRITE_VALID_PPE MI_WRITE_VALID_PTE
 130
 131 /* Convert an address to a corresponding PTE */
 132 #define MiAddressToPte(x) \
 133     ((PMMPTE)(((((ULONG)(x)) >> 12) << 2) + PTE_BASE))
 134
 135 /* Convert an address to a corresponding PDE */
 136 #define MiAddressToPde(x) \
 137     ((PMMPDE)(((((ULONG)(x)) >> 22) << 2) + PDE_BASE))
 138
 139 /* Convert an address to a corresponding PTE offset/index */
 140 #define MiAddressToPteOffset(x) \
 141     ((((ULONG)(x)) << 10) >> 22)
 142
 143 /* Convert an address to a corresponding PDE offset/index */
 144 #define MiAddressToPdeOffset(x) \
 145     (((ULONG)(x)) / (1024 * PAGE_SIZE))
 146 #define MiGetPdeOffset MiAddressToPdeOffset
 147
 148 /* Convert a PTE/PDE into a corresponding address */
 149 #define MiPteToAddress(_Pte) ((PVOID)((ULONG)(_Pte) << 10))
 150 #define MiPdeToAddress(_Pde) ((PVOID)((ULONG)(_Pde) << 20))
 151
 152 /* Translate between P*Es */
 153 #define MiPdeToPte(_Pde) ((PMMPTE)MiPteToAddress(_Pde))
 154 #define MiPteToPde(_Pte) ((PMMPDE)MiAddressToPte(_Pte))
 155
 156 /* Check P*E boundaries */
 157 #define MiIsPteOnPdeBoundary(PointerPte) \
 158     ((((ULONG_PTR)PointerPte) & (PAGE_SIZE - 1)) == 0)
 159
 160 //
 161 // Decodes a Prototype PTE into the underlying PTE
 162 //
 163 #define MiProtoPteToPte(x)                  \
 164     (PMMPTE)((ULONG_PTR)MmPagedPoolStart +  \
 165              (((x)->u.Proto.ProtoAddressHigh << 9) | (x)->u.Proto.ProtoAddressLow << 2))
 166
 167 //
 168 // Decodes a Prototype PTE into the underlying PTE
 169 //
 170 #define MiSubsectionPteToSubsection(x)                              \
 171     ((x)->u.Subsect.WhichPool == PagedPool) ?                       \
 172         (PMMPTE)((ULONG_PTR)MmSubsectionBase +                      \
 173                  (((x)->u.Subsect.SubsectionAddressHigh << 7) |     \
 174                    (x)->u.Subsect.SubsectionAddressLow << 3)) :     \
 175         (PMMPTE)((ULONG_PTR)MmNonPagedPoolEnd -                     \
 176                 (((x)->u.Subsect.SubsectionAddressHigh << 7) |      \
 177                   (x)->u.Subsect.SubsectionAddressLow << 3))