arch/x86/include/asm/pgtable-3level_types.h

   1 #ifndef _ASM_X86_PGTABLE_3LEVEL_DEFS_H
   2 #define _ASM_X86_PGTABLE_3LEVEL_DEFS_H
   3
   4 #ifndef __ASSEMBLY__
   5 #include <linux/types.h>
   6
   7 typedef u64     pteval_t;
   8 typedef u64     pmdval_t;
   9 typedef u64     pudval_t;
  10 typedef u64     pgdval_t;
  11 typedef u64     pgprotval_t;
  12
  13 typedef union {
  14         struct {
  15                 unsigned long pte_low, pte_high;
  16         };
  17         pteval_t pte;
  18 } pte_t;
  19 #endif  /* !__ASSEMBLY__ */
  20
  21 #ifdef CONFIG_PARAVIRT
  22 #define SHARED_KERNEL_PMD       (pv_info.shared_kernel_pmd)
  23 #else
  24 #define SHARED_KERNEL_PMD       1
  25 #endif
  26
  27 #define PAGETABLE_LEVELS        3
  28
  29 /*
  30  * PGDIR_SHIFT determines what a top-level page table entry can map
  31  */
  32 #define PGDIR_SHIFT     30
  33 #define PTRS_PER_PGD    4
  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
  48 #endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */