reactos/ntoskrnl/include/internal/amd64/mm.h

   1 /*
   2  * Lowlevel memory managment definitions
   3  */
   4
   5 #ifndef __NTOSKRNL_INCLUDE_INTERNAL_AMD64_MM_H
   6 #define __NTOSKRNL_INCLUDE_INTERNAL_AMD64_MM_H
   7
   8 struct _EPROCESS;
   9
  10 PULONG64
  11 FORCEINLINE
  12 MmGetPageDirectory(VOID)
  13 {
  14     return (PULONG64)__readcr3();
  15 }
  16
  17 #define PAGE_MASK(x)            ((x)&(~0xfff))
  18 #define PAE_PAGE_MASK(x)        ((x)&(~0xfffLL))
  19
  20 /* Base addresses of PTE and PDE */
  21 #define PAGETABLE_MAP       (0xc0000000)
  22 #define PAGEDIRECTORY_MAP   (0xc0000000 + (PAGETABLE_MAP / (1024)))
  23
  24 /* Converting address to a corresponding PDE or PTE entry */
  25 #define MiAddressToPde(x) \
  26     ((PMMPTE)(((((ULONG64)(x)) >> 22) << 2) + PAGEDIRECTORY_MAP))
  27 #define MiAddressToPte(x) \
  28     ((PMMPTE)(((((ULONG64)(x)) >> 12) << 2) + PAGETABLE_MAP))
  29
  30 //#define ADDR_TO_PAGE_TABLE(v) (((ULONG)(v)) / (1024 * PAGE_SIZE))
  31 //#define ADDR_TO_PDE_OFFSET(v) ((((ULONG)(v)) / (1024 * PAGE_SIZE)))
  32 //#define ADDR_TO_PTE_OFFSET(v)  ((((ULONG)(v)) % (1024 * PAGE_SIZE)) / PAGE_SIZE)
  33
  34 #define VAtoPXI(va) ((((ULONG64)va) >> PXI_SHIFT) & 0x1FF)
  35 #define VAtoPPI(va) ((((ULONG64)va) >> PPI_SHIFT) & 0x1FF)
  36 #define VAtoPDI(va) ((((ULONG64)va) >> PDI_SHIFT) & 0x1FF)
  37 #define VAtoPTI(va) ((((ULONG64)va) >> PTI_SHIFT) & 0x1FF)
  38
  39
  40 /* Easy accessing PFN in PTE */
  41 #define PFN_FROM_PTE(v) ((v)->u.Hard.PageFrameNumber)
  42
  43 #endif /* __NTOSKRNL_INCLUDE_INTERNAL_AMD64_MM_H */