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 /* Converting address to a corresponding PDE or PTE entry */
  19 #define MiAddressToPde(x) \
  20     ((PMMPTE)(((((ULONG)(x)) >> 22) << 2) + PAGEDIRECTORY_MAP))
  21 #define MiAddressToPte(x) \
  22     ((PMMPTE)(((((ULONG)(x)) >> 12) << 2) + PAGETABLE_MAP))
  23
  24 #define ADDR_TO_PAGE_TABLE(v) (((ULONG)(v)) / (1024 * PAGE_SIZE))
  25 #define ADDR_TO_PDE_OFFSET(v) ((((ULONG)(v)) / (1024 * PAGE_SIZE)))
  26 #define ADDR_TO_PTE_OFFSET(v)  ((((ULONG)(v)) % (1024 * PAGE_SIZE)) / PAGE_SIZE)
  27
  28 /* Easy accessing PFN in PTE */
  29 #define PFN_FROM_PTE(v) ((v)->u.Hard.PageFrameNumber)
  30
  31 #endif /* __NTOSKRNL_INCLUDE_INTERNAL_I386_MM_H */