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
  24 /*
  25  * PGDIR_SHIFT determines what a top-level page table entry can map
  26  */
  27 #define PGDIR_SHIFT     39
  28 #define PTRS_PER_PGD    512
  29
  30 /*
  31  * 3rd level page
  32  */
  33 #define PUD_SHIFT       30
  34 #define PTRS_PER_PUD    512
  35
  36 /*
  37  * PMD_SHIFT determines the size of the area a middle-level
  38  * page table can map
  39  */
  40 #define PMD_SHIFT       21
  41 #define PTRS_PER_PMD    512
  42
  43 /*
  44  * entries per page directory level
  45  */
  46 #define PTRS_PER_PTE    512
  47
  48 #define PMD_SIZE        (_AC(1, UL) << PMD_SHIFT)
  49 #define PMD_MASK        (~(PMD_SIZE - 1))
  50 #define PUD_SIZE        (_AC(1, UL) << PUD_SHIFT)
  51 #define PUD_MASK        (~(PUD_SIZE - 1))
  52 #define PGDIR_SIZE      (_AC(1, UL) << PGDIR_SHIFT)
  53 #define PGDIR_MASK      (~(PGDIR_SIZE - 1))
  54
  55 /* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */
  56 #define MAXMEM           _AC(__AC(1, UL) << MAX_PHYSMEM_BITS, UL)
  57 #define VMALLOC_START    _AC(0xffffc90000000000, UL)
  58 #define VMALLOC_END      _AC(0xffffe8ffffffffff, UL)
  59 #define VMEMMAP_START    _AC(0xffffea0000000000, UL)
  60 #define MODULES_VADDR    (__START_KERNEL_map + KERNEL_IMAGE_SIZE)
  61 #define MODULES_END      _AC(0xffffffffff000000, UL)
  62 #define MODULES_LEN   (MODULES_END - MODULES_VADDR)
  63 #define ESPFIX_PGD_ENTRY _AC(-2, UL)
  64 #define ESPFIX_BASE_ADDR (ESPFIX_PGD_ENTRY << PGDIR_SHIFT)
  65 #define EFI_VA_START     ( -4 * (_AC(1, UL) << 30))
  66 #define EFI_VA_END       (-68 * (_AC(1, UL) << 30))
  67
  68 #define EARLY_DYNAMIC_PAGE_TABLES       64
  69
  70 #endif /* _ASM_X86_PGTABLE_64_DEFS_H */