reactos/ntoskrnl/include/internal/i386/mm.h

   1 /*
   2  * Lowlevel memory managment definitions
   3  */
   4
   5 #ifndef __NTOSKRNL_INCLUDE_INTERNAL_I386_MM_H
   6 #define __NTOSKRNL_INCLUDE_INTERNAL_I386_MM_H
   7
   8 struct _EPROCESS;
   9 PULONG MmGetPageDirectory(VOID);
  10
  11 #define PAGE_MASK(x)            ((x)&(~0xfff))
  12 #define PAE_PAGE_MASK(x)        ((x)&(~0xfffLL))
  13
  14 /* Base addresses of PTE and PDE */
  15 #define PAGETABLE_MAP       (0xc0000000)
  16 #define PAGEDIRECTORY_MAP   (0xc0000000 + (PAGETABLE_MAP / (1024)))
  17
  18 #define PTE_BASE    0xC0000000
  19 #define PDE_BASE    0xC0300000
  20 #define PTE_TOP     0xC03FFFFF
  21 #define PTE_PER_PAGE 1024
  22 #define HYPER_SPACE 0xC0400000
  23 #define HYPER_SPACE_END 0xC07FFFFF
  24
  25 /* Converting address to a corresponding PDE or PTE entry */
  26 #define MiAddressToPde(x) \
  27     ((PMMPTE)(((((ULONG)(x)) >> 22) << 2) + PAGEDIRECTORY_MAP))
  28 #define MiAddressToPte(x) \
  29     ((PMMPTE)(((((ULONG)(x)) >> 12) << 2) + PAGETABLE_MAP))
  30 #define MiAddressToPteOffset(x) \
  31     ((((ULONG)(x)) << 10) >> 22)
  32
  33 //
  34 // Convert a PTE into a corresponding address
  35 //
  36 #define MiPteToAddress(PTE) ((PVOID)((ULONG)(PTE) << 10))
  37 #define MiIsPdeForAddressValid(Pde) (MiAddressToPde(Address)->u.Hard.Valid)
  38
  39 #define ADDR_TO_PAGE_TABLE(v) (((ULONG)(v)) / (1024 * PAGE_SIZE))
  40 #define ADDR_TO_PDE_OFFSET(v) ((((ULONG)(v)) / (1024 * PAGE_SIZE)))
  41 #define ADDR_TO_PTE_OFFSET(v)  ((((ULONG)(v)) % (1024 * PAGE_SIZE)) / PAGE_SIZE)
  42
  43 /* Easy accessing PFN in PTE */
  44 #define PFN_FROM_PTE(v) ((v)->u.Hard.PageFrameNumber)
  45
  46 #define MI_MAKE_LOCAL_PAGE(x)      ((x)->u.Hard.Global = 0)
  47 #define MI_MAKE_DIRTY_PAGE(x)      ((x)->u.Hard.Dirty = 1)
  48 #define MI_PAGE_DISABLE_CACHE(x)   ((x)->u.Hard.CacheDisable = 1)
  49 #define MI_PAGE_WRITE_THROUGH(x)   ((x)->u.Hard.WriteThrough = 1)
  50 #define MI_PAGE_WRITE_COMBINED(x)  ((x)->u.Hard.WriteThrough = 0)
  51 #if !defined(CONFIG_SMP)
  52 #define MI_IS_PAGE_WRITEABLE(x)    ((x)->u.Hard.Write == 1)
  53 #else
  54 #define MI_IS_PAGE_WRITEABLE(x)    ((x)->u.Hard.Writable == 1)
  55 #endif
  56 #define MI_IS_PAGE_COPY_ON_WRITE(x)((x)->u.Hard.CopyOnWrite == 1)
  57 #define MI_IS_PAGE_DIRTY(x)        ((x)->u.Hard.Dirty == 1)
  58 #define MI_MAKE_OWNER_PAGE(x)      ((x)->u.Hard.Owner = 1)
  59 #if !defined(CONFIG_SMP)
  60 #define MI_MAKE_WRITE_PAGE(x)      ((x)->u.Hard.Write = 1)
  61 #else
  62 #define MI_MAKE_WRITE_PAGE(x)      ((x)->u.Hard.Writable = 1)
  63 #endif
  64
  65 #endif /* __NTOSKRNL_INCLUDE_INTERNAL_I386_MM_H */