reactos/ntoskrnl/include/internal/arm/mm.h

   1 #ifndef __NTOSKRNL_INCLUDE_INTERNAL_ARM_MM_H
   2 #define __NTOSKRNL_INCLUDE_INTERNAL_ARM_MM_H
   3
   4 //
   5 // Number of bits corresponding to the area that a PDE entry represents (1MB)
   6 //
   7 #define PDE_SHIFT 20
   8 #define PDE_SIZE  (1 << PDE_SHIFT)
   9
  10
  11 //
  12 // FIXFIX: This is all wrong now!!!
  13 //
  14
  15
  16 //
  17 // Number of bits corresponding to the area that a coarse page table entry represents (4KB)
  18 //
  19 #define PTE_SHIFT 12
  20 //#define PAGE_SIZE (1 << PTE_SHIFT) // FIXME: This conflicts with ndk/arm/mmtypes.h which does #define PAGE_SIZE 0x1000 -- use PTE_SIZE here instead?
  21
  22 //
  23 // Number of bits corresponding to the area that a coarse page table occupies (1KB)
  24 //
  25 #define CPT_SHIFT 10
  26 #define CPT_SIZE  (1 << CPT_SHIFT)
  27
  28
  29
  30 //
  31 // FIXFIX: This is all wrong now!!!
  32 //
  33 typedef union _ARM_PTE
  34 {
  35     union
  36     {
  37         struct
  38         {
  39             ULONG Type:2;
  40             ULONG Unused:30;
  41         } Fault;
  42         struct
  43         {
  44             ULONG Type:2;
  45             ULONG Ignored:2;
  46             ULONG Reserved:1;
  47             ULONG Domain:4;
  48             ULONG Ignored1:1;
  49             ULONG BaseAddress:22;
  50         } Coarse;
  51         struct
  52         {
  53             ULONG Type:2;
  54             ULONG Buffered:1;
  55             ULONG Cached:1;
  56             ULONG Reserved:1;
  57             ULONG Domain:4;
  58             ULONG Ignored:1;
  59             ULONG Access:2;
  60             ULONG Ignored1:8;
  61             ULONG BaseAddress:12;
  62         } Section;
  63         struct
  64         {
  65             ULONG Type:2;
  66             ULONG Reserved:3;
  67             ULONG Domain:4;
  68             ULONG Ignored:3;
  69             ULONG BaseAddress:20;
  70         } Fine;
  71     } L1;
  72     union
  73     {
  74         struct
  75         {
  76             ULONG Type:2;
  77             ULONG Unused:30;
  78         } Fault;
  79         struct
  80         {
  81             ULONG Type:2;
  82             ULONG Buffered:1;
  83             ULONG Cached:1;
  84             ULONG Access0:2;
  85             ULONG Access1:2;
  86             ULONG Access2:2;
  87             ULONG Access3:2;
  88             ULONG Ignored:4;
  89             ULONG BaseAddress:16;
  90         } Large;
  91         struct
  92         {
  93             ULONG Type:2;
  94             ULONG Buffered:1;
  95             ULONG Cached:1;
  96             ULONG Access0:2;
  97             ULONG Access1:2;
  98             ULONG Access2:2;
  99             ULONG Access3:2;
 100             ULONG BaseAddress:20;
 101         } Small;
 102         struct
 103         {
 104             ULONG Type:2;
 105             ULONG Buffered:1;
 106             ULONG Cached:1;
 107             ULONG Access0:2;
 108             ULONG Ignored:4;
 109             ULONG BaseAddress:22;
 110         } Tiny;
 111     } L2;
 112     ULONG AsUlong;
 113 } ARM_PTE, *PARM_PTE;
 114
 115 typedef struct _ARM_TRANSLATION_TABLE
 116 {
 117     ARM_PTE Pte[4096];
 118 } ARM_TRANSLATION_TABLE, *PARM_TRANSLATION_TABLE;
 119
 120 typedef struct _ARM_COARSE_PAGE_TABLE
 121 {
 122     ARM_PTE Pte[256];
 123     ULONG Padding[768];
 124 } ARM_COARSE_PAGE_TABLE, *PARM_COARSE_PAGE_TABLE;
 125
 126 typedef enum _ARM_L1_PTE_TYPE
 127 {
 128     FaultPte,
 129     CoarsePte,
 130     SectionPte,
 131     FinePte
 132 } ARM_L1_PTE_TYPE;
 133
 134 typedef enum _ARM_L2_PTE_TYPE
 135 {
 136     LargePte = 1,
 137     SmallPte,
 138     TinyPte
 139 } ARM_L2_PTE_TYPE;
 140
 141 typedef enum _ARM_PTE_ACCESS
 142 {
 143     FaultAccess,
 144     SupervisorAccess,
 145     SharedAccess,
 146     UserAccess
 147 } ARM_PTE_ACCESS;
 148
 149 typedef enum _ARM_DOMAIN
 150 {
 151     FaultDomain,
 152     ClientDomain,
 153     InvalidDomain,
 154     ManagerDomain
 155 } ARM_DOMAIN;
 156
 157
 158 //
 159 // FIXFIX: This is all wrong now!!!
 160 //
 161
 162 //
 163 // Take 0x80812345 and extract:
 164 // PTE_BASE[0x808][0x12]
 165 //
 166 #define MiGetPteAddress(x)         \
 167     (PMMPTE)(PTE_BASE + \
 168              (((ULONG)(x) >> 20) << 12) + \
 169              ((((ULONG)(x) >> 12) & 0xFF) << 2))
 170
 171 #define MiGetPdeAddress(x)         \
 172     (PMMPDE_HARDWARE)(PDE_BASE + \
 173              (((ULONG)(x) >> 20) << 2))
 174
 175 #define MiGetPdeOffset(x) (((ULONG)(x)) >> 22)
 176
 177 #define PTE_BASE    0xC0000000
 178 #define PTE_TOP    0xC03FFFFF
 179 #define PDE_BASE    0xC1000000
 180 #define HYPER_SPACE 0xC1100000
 181 #define HYPER_SPACE_END 0xC07FFFFF
 182
 183 struct _EPROCESS;
 184 PULONG MmGetPageDirectory(VOID);
 185
 186
 187 //
 188 // FIXME: THESE ARE WRONG ATM.
 189 //
 190 #define MiAddressToPde(x) \
 191 ((PMMPTE)(((((ULONG)(x)) >> 22) << 2) + PDE_BASE))
 192 #define MiAddressToPte(x) \
 193 ((PMMPTE)(((((ULONG)(x)) >> 12) << 2) + PTE_BASE))
 194 #define MiAddressToPteOffset(x) \
 195 ((((ULONG)(x)) << 10) >> 22)
 196
 197 //
 198 // Convert a PTE into a corresponding address
 199 //
 200 #define MiPteToAddress(PTE) ((PVOID)((ULONG)(PTE) << 10))
 201
 202 #define ADDR_TO_PAGE_TABLE(v) (((ULONG)(v)) / (1024 * PAGE_SIZE))
 203 #define ADDR_TO_PDE_OFFSET(v) ((((ULONG)(v)) / (1024 * PAGE_SIZE)))
 204 #define ADDR_TO_PTE_OFFSET(v)  ((((ULONG)(v)) % (1024 * PAGE_SIZE)) / PAGE_SIZE)
 205
 206 #define MI_MAKE_LOCAL_PAGE(x)      ((x)->u.Hard.NonGlobal = 1)
 207 #define MI_MAKE_DIRTY_PAGE(x)
 208 #define MI_MAKE_OWNER_PAGE(x)      ((x)->u.Hard.Access = 1) // FIXFIX
 209 #define MI_MAKE_WRITE_PAGE(x)      ((x)->u.Hard.ExtendedAccess = 1) // FIXFIX
 210 #define MI_PAGE_DISABLE_CACHE(x)   ((x)->u.Hard.Cached = 0)
 211 #define MI_PAGE_WRITE_THROUGH(x)   ((x)->u.Hard.Buffered = 0)
 212 #define MI_PAGE_WRITE_COMBINED(x)  ((x)->u.Hard.Buffered = 1)
 213 #define MI_IS_PAGE_WRITEABLE(x)    ((x)->u.Hard.ExtendedAccess == 0)
 214 #define MI_IS_PAGE_COPY_ON_WRITE(x)FALSE
 215 #define MI_IS_PAGE_DIRTY(x)        TRUE
 216
 217 /* Easy accessing PFN in PTE */
 218 #define PFN_FROM_PTE(v) ((v)->u.Hard.PageFrameNumber)
 219
 220 #endif