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     p4dval_t;
  11 typedef u64     pgdval_t;
  12 typedef u64     pgprotval_t;
  13
  14 typedef union {
  15         struct {
  16                 unsigned long pte_low, pte_high;
  17         };
  18         pteval_t pte;
  19 } pte_t;
  20 #endif  /* !__ASSEMBLY__ */
  21
  22 #ifdef CONFIG_PARAVIRT
  23 #define SHARED_KERNEL_PMD       (pv_info.shared_kernel_pmd)
  24 #else
  25 #define SHARED_KERNEL_PMD       1
  26 #endif
  27
  28 /*
  29  * PGDIR_SHIFT determines what a top-level page table entry can map
  30  */
  31 #define PGDIR_SHIFT     30
  32 #define PTRS_PER_PGD    4
  33
  34 /*
  35  * PMD_SHIFT determines the size of the area a middle-level
  36  * page table can map
  37  */
  38 #define PMD_SHIFT       21
  39 #define PTRS_PER_PMD    512
  40
  41 /*
  42  * entries per page directory level
  43  */
  44 #define PTRS_PER_PTE    512
  45
  46
  47 #endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */