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 #if __GNUC__ >=3
   5 #pragma GCC system_header
   6 #endif
   7
   8 //
   9 // Number of bits corresponding to the area that a PDE entry represents (1MB)
  10 //
  11 #define PDE_SHIFT 20
  12 #define PDE_SIZE  (1 << PDE_SHIFT)
  13
  14 //
  15 // Number of bits corresponding to the area that a coarse page table entry represents (4KB)
  16 //
  17 #define PTE_SHIFT 12
  18 #define PAGE_SIZE (1 << PTE_SHIFT)
  19
  20 //
  21 // Number of bits corresponding to the area that a coarse page table occupies (1KB)
  22 //
  23 #define CPT_SHIFT 10
  24 #define CPT_SIZE  (1 << CPT_SHIFT)
  25
  26 typedef union _ARM_PTE
  27 {
  28     union
  29     {
  30         struct
  31         {
  32             ULONG Type:2;
  33             ULONG Unused:30;
  34         } Fault;
  35         struct
  36         {
  37             ULONG Type:2;
  38             ULONG Ignored:2;
  39             ULONG Reserved:1;
  40             ULONG Domain:4;
  41             ULONG Ignored1:1;
  42             ULONG BaseAddress:22;
  43         } Coarse;
  44         struct
  45         {
  46             ULONG Type:2;
  47             ULONG Buffered:1;
  48             ULONG Cached:1;
  49             ULONG Reserved:1;
  50             ULONG Domain:4;
  51             ULONG Ignored:1;
  52             ULONG Access:2;
  53             ULONG Ignored1:8;
  54             ULONG BaseAddress:12;
  55         } Section;
  56         struct
  57         {
  58             ULONG Type:2;
  59             ULONG Reserved:3;
  60             ULONG Domain:4;
  61             ULONG Ignored:3;
  62             ULONG BaseAddress:20;
  63         } Fine;
  64     } L1;
  65     union
  66     {
  67         struct
  68         {
  69             ULONG Type:2;
  70             ULONG Unused:30;
  71         } Fault;
  72         struct
  73         {
  74             ULONG Type:2;
  75             ULONG Buffered:1;
  76             ULONG Cached:1;
  77             ULONG Access0:2;
  78             ULONG Access1:2;
  79             ULONG Access2:2;
  80             ULONG Access3:2;
  81             ULONG Ignored:4;
  82             ULONG BaseAddress:16;
  83         } Large;
  84         struct
  85         {
  86             ULONG Type:2;
  87             ULONG Buffered:1;
  88             ULONG Cached:1;
  89             ULONG Access0:2;
  90             ULONG Access1:2;
  91             ULONG Access2:2;
  92             ULONG Access3:2;
  93             ULONG BaseAddress:20;
  94         } Small;
  95         struct
  96         {
  97             ULONG Type:2;
  98             ULONG Buffered:1;
  99             ULONG Cached:1;
 100             ULONG Access0:2;
 101             ULONG Ignored:4;
 102             ULONG BaseAddress:22;
 103         } Tiny;
 104     } L2;
 105     ULONG AsUlong;
 106 } ARM_PTE, *PARM_PTE;
 107
 108 typedef struct _ARM_TRANSLATION_TABLE
 109 {
 110     ARM_PTE Pte[4096];
 111 } ARM_TRANSLATION_TABLE, *PARM_TRANSLATION_TABLE;
 112
 113 typedef struct _ARM_COARSE_PAGE_TABLE
 114 {
 115     ARM_PTE Pte[256];
 116     ULONG Padding[768];
 117 } ARM_COARSE_PAGE_TABLE, *PARM_COARSE_PAGE_TABLE;
 118
 119 typedef enum _ARM_L1_PTE_TYPE
 120 {
 121     FaultPte,
 122     CoarsePte,
 123     SectionPte,
 124     FinePte
 125 } ARM_L1_PTE_TYPE;
 126
 127 typedef enum _ARM_L2_PTE_TYPE
 128 {
 129     LargePte = 1,
 130     SmallPte,
 131     TinyPte
 132 } ARM_L2_PTE_TYPE;
 133
 134 typedef enum _ARM_PTE_ACCESS
 135 {
 136     FaultAccess,
 137     SupervisorAccess,
 138     SharedAccess,
 139     UserAccess
 140 } ARM_PTE_ACCESS;
 141
 142 typedef enum _ARM_DOMAIN
 143 {
 144     FaultDomain,
 145     ClientDomain,
 146     InvalidDomain,
 147     ManagerDomain
 148 } ARM_DOMAIN;
 149
 150 #endif