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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_PGTABLE_3LEVEL_DEFS_H
   3 #define _ASM_X86_PGTABLE_3LEVEL_DEFS_H
   4
   5 #ifndef __ASSEMBLY__
   6 #include <linux/types.h>
   7
   8 typedef u64     pteval_t;
   9 typedef u64     pmdval_t;
  10 typedef u64     pudval_t;
  11 typedef u64     p4dval_t;
  12 typedef u64     pgdval_t;
  13 typedef u64     pgprotval_t;
  14
  15 typedef union {
  16         struct {
  17                 unsigned long pte_low, pte_high;
  18         };
  19         pteval_t pte;
  20 } pte_t;
  21 #endif  /* !__ASSEMBLY__ */
  22
  23 #ifdef CONFIG_PARAVIRT
  24 #define SHARED_KERNEL_PMD       (pv_info.shared_kernel_pmd)
  25 #else
  26 #define SHARED_KERNEL_PMD       1
  27 #endif
  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 */