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 #include <asm/sparsemem.h>
   5
   6 #ifndef __ASSEMBLY__
   7 #include <linux/types.h>
   8
   9 /*
  10  * These are used to make use of C type-checking..
  11  */
  12 typedef unsigned long   pteval_t;
  13 typedef unsigned long   pmdval_t;
  14 typedef unsigned long   pudval_t;
  15 typedef unsigned long   pgdval_t;
  16 typedef unsigned long   pgprotval_t;
  17
  18 typedef struct { pteval_t pte; } pte_t;
  19
  20 #endif  /* !__ASSEMBLY__ */
  21
  22 #define SHARED_KERNEL_PMD       0
  23 #define PAGETABLE_LEVELS        4
  24
  25 /*
  26  * PGDIR_SHIFT determines what a top-level page table entry can map
  27  */
  28 #define PGDIR_SHIFT     39
  29 #define PTRS_PER_PGD    512
  30
  31 /*
  32  * 3rd level page
  33  */
  34 #define PUD_SHIFT       30
  35 #define PTRS_PER_PUD    512
  36
  37 /*
  38  * PMD_SHIFT determines the size of the area a middle-level
  39  * page table can map
  40  */
  41 #define PMD_SHIFT       21
  42 #define PTRS_PER_PMD    512
  43
  44 /*
  45  * entries per page directory level
  46  */
  47 #define PTRS_PER_PTE    512
  48
  49 #define PMD_SIZE        (_AC(1, UL) << PMD_SHIFT)
  50 #define PMD_MASK        (~(PMD_SIZE - 1))
  51 #define PUD_SIZE        (_AC(1, UL) << PUD_SHIFT)
  52 #define PUD_MASK        (~(PUD_SIZE - 1))
  53 #define PGDIR_SIZE      (_AC(1, UL) << PGDIR_SHIFT)
  54 #define PGDIR_MASK      (~(PGDIR_SIZE - 1))
  55
  56 /* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */
  57 #define MAXMEM           _AC(__AC(1, UL) << MAX_PHYSMEM_BITS, UL)
  58 #define VMALLOC_START    _AC(0xffffc90000000000, UL)
  59 #define VMALLOC_END      _AC(0xffffe8ffffffffff, UL)
  60 #define VMEMMAP_START    _AC(0xffffea0000000000, UL)
  61 #define MODULES_VADDR    (__START_KERNEL_map + KERNEL_IMAGE_SIZE)
  62 #define MODULES_END      _AC(0xffffffffff000000, UL)
  63 #define MODULES_LEN   (MODULES_END - MODULES_VADDR)
  64 #define ESPFIX_PGD_ENTRY _AC(-2, UL)
  65 #define ESPFIX_BASE_ADDR (ESPFIX_PGD_ENTRY << PGDIR_SHIFT)
  66
  67 #define EARLY_DYNAMIC_PAGE_TABLES       64
  68
  69 #endif /* _ASM_X86_PGTABLE_64_DEFS_H */