LXR linux/arch/x86/include/asm/pgtable_64

   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#include <asm/kaslr.h>
   9
  10/*
  11 * These are used to make use of C type-checking..
  12 */
  13typedef unsigned long   pteval_t;
  14typedef unsigned long   pmdval_t;
  15typedef unsigned long   pudval_t;
  16typedef unsigned long   p4dval_t;
  17typedef unsigned long   pgdval_t;
  18typedef unsigned long   pgprotval_t;
  19
  20typedef struct { pteval_t pte; } pte_t;
  21
  22#endif  /* !__ASSEMBLY__ */
  23
  24#define SHARED_KERNEL_PMD       0
  25
  26#ifdef CONFIG_X86_5LEVEL
  27
  28/*
  29 * PGDIR_SHIFT determines what a top-level page table entry can map
  30 */
  31#define PGDIR_SHIFT     48
  32#define PTRS_PER_PGD    512
  33
  34/*
  35 * 4th level page in 5-level paging case
  36 */
  37#define P4D_SHIFT       39
  38#define PTRS_PER_P4D    512
  39#define P4D_SIZE        (_AC(1, UL) << P4D_SHIFT)
  40#define P4D_MASK        (~(P4D_SIZE - 1))
  41
  42#else /* CONFIG_X86_5LEVEL */
  43
  44/*
  45 * PGDIR_SHIFT determines what a top-level page table entry can map
  46 */
  47#define PGDIR_SHIFT     39
  48#define PTRS_PER_PGD    512
  49
  50#endif /* CONFIG_X86_5LEVEL */
  51
  52/*
  53 * 3rd level page
  54 */
  55#define PUD_SHIFT       30
  56#define PTRS_PER_PUD    512
  57
  58/*
  59 * PMD_SHIFT determines the size of the area a middle-level
  60 * page table can map
  61 */
  62#define PMD_SHIFT       21
  63#define PTRS_PER_PMD    512
  64
  65/*
  66 * entries per page directory level
  67 */
  68#define PTRS_PER_PTE    512
  69
  70#define PMD_SIZE        (_AC(1, UL) << PMD_SHIFT)
  71#define PMD_MASK        (~(PMD_SIZE - 1))
  72#define PUD_SIZE        (_AC(1, UL) << PUD_SHIFT)
  73#define PUD_MASK        (~(PUD_SIZE - 1))
  74#define PGDIR_SIZE      (_AC(1, UL) << PGDIR_SHIFT)
  75#define PGDIR_MASK      (~(PGDIR_SIZE - 1))
  76
  77/* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */
  78#define MAXMEM          _AC(__AC(1, UL) << MAX_PHYSMEM_BITS, UL)
  79#ifdef CONFIG_X86_5LEVEL
  80#define VMALLOC_SIZE_TB _AC(16384, UL)
  81#define __VMALLOC_BASE  _AC(0xff92000000000000, UL)
  82#define __VMEMMAP_BASE  _AC(0xffd4000000000000, UL)
  83#else
  84#define VMALLOC_SIZE_TB _AC(32, UL)
  85#define __VMALLOC_BASE  _AC(0xffffc90000000000, UL)
  86#define __VMEMMAP_BASE  _AC(0xffffea0000000000, UL)
  87#endif
  88#ifdef CONFIG_RANDOMIZE_MEMORY
  89#define VMALLOC_START   vmalloc_base
  90#define VMEMMAP_START   vmemmap_base
  91#else
  92#define VMALLOC_START   __VMALLOC_BASE
  93#define VMEMMAP_START   __VMEMMAP_BASE
  94#endif /* CONFIG_RANDOMIZE_MEMORY */
  95#define VMALLOC_END     (VMALLOC_START + _AC((VMALLOC_SIZE_TB << 40) - 1, UL))
  96#define MODULES_VADDR    (__START_KERNEL_map + KERNEL_IMAGE_SIZE)
  97/* The module sections ends with the start of the fixmap */
  98#define MODULES_END   __fix_to_virt(__end_of_fixed_addresses + 1)
  99#define MODULES_LEN   (MODULES_END - MODULES_VADDR)
 100#define ESPFIX_PGD_ENTRY _AC(-2, UL)
 101#define ESPFIX_BASE_ADDR (ESPFIX_PGD_ENTRY << P4D_SHIFT)
 102#define EFI_VA_START     ( -4 * (_AC(1, UL) << 30))
 103#define EFI_VA_END       (-68 * (_AC(1, UL) << 30))
 104
 105#define EARLY_DYNAMIC_PAGE_TABLES       64
 106
 107#endif /* _ASM_X86_PGTABLE_64_DEFS_H */
 108