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 /*
  28  * PGDIR_SHIFT determines what a top-level page table entry can map
  29  */
  30 #define PGDIR_SHIFT     30
  31 #define PTRS_PER_PGD    4
  32
  33 /*
  34  * PMD_SHIFT determines the size of the area a middle-level
  35  * page table can map
  36  */
  37 #define PMD_SHIFT       21
  38 #define PTRS_PER_PMD    512
  39
  40 /*
  41  * entries per page directory level
  42  */
  43 #define PTRS_PER_PTE    512
  44
  45
  46 #endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */