arch/x86/include/asm/pgtable_64_types.h

   1 #ifndef _ASM_X86_PGTABLE_64_DEFS_H
   2 #define _ASM_X86_PGTABLE_64_DEFS_H
   3
   4 #ifndef __ASSEMBLY__
   5 #include <linux/types.h>
   6
   7 /*
   8  * These are used to make use of C type-checking..
   9  */
  10 typedef unsigned long   pteval_t;
  11 typedef unsigned long   pmdval_t;
  12 typedef unsigned long   pudval_t;
  13 typedef unsigned long   pgdval_t;
  14 typedef unsigned long   pgprotval_t;
  15
  16 typedef struct { pteval_t pte; } pte_t;
  17
  18 #endif  /* !__ASSEMBLY__ */
  19
  20 #define SHARED_KERNEL_PMD       0
  21 #define PAGETABLE_LEVELS        4
  22
  23 /*
  24  * PGDIR_SHIFT determines what a top-level page table entry can map
  25  */
  26 #define PGDIR_SHIFT     39
  27 #define PTRS_PER_PGD    512
  28
  29 /*
  30  * 3rd level page
  31  */
  32 #define PUD_SHIFT       30
  33 #define PTRS_PER_PUD    512
  34
  35 /*
  36  * PMD_SHIFT determines the size of the area a middle-level
  37  * page table can map
  38  */
  39 #define PMD_SHIFT       21
  40 #define PTRS_PER_PMD    512
  41
  42 /*
  43  * entries per page directory level
  44  */
  45 #define PTRS_PER_PTE    512
  46
  47 #define PMD_SIZE        (_AC(1, UL) << PMD_SHIFT)
  48 #define PMD_MASK        (~(PMD_SIZE - 1))
  49 #define PUD_SIZE        (_AC(1, UL) << PUD_SHIFT)
  50 #define PUD_MASK        (~(PUD_SIZE - 1))
  51 #define PGDIR_SIZE      (_AC(1, UL) << PGDIR_SHIFT)
  52 #define PGDIR_MASK      (~(PGDIR_SIZE - 1))
  53
  54 /* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */
  55 #define MAXMEM           _AC(__AC(1, UL) << MAX_PHYSMEM_BITS, UL)
  56 #define VMALLOC_START    _AC(0xffffc90000000000, UL)
  57 #define VMALLOC_END      _AC(0xffffe8ffffffffff, UL)
  58 #define VMEMMAP_START    _AC(0xffffea0000000000, UL)
  59 #define MODULES_VADDR    _AC(0xffffffffa0000000, UL)
  60 #define MODULES_END      _AC(0xffffffffff000000, UL)
  61 #define MODULES_LEN   (MODULES_END - MODULES_VADDR)
  62
  63 #endif /* _ASM_X86_PGTABLE_64_DEFS_H */