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 7typedef u64 pteval_t; 8typedef u64 pmdval_t; 9typedef u64 pudval_t; 10typedef u64 pgdval_t; 11typedef u64 pgprotval_t; 12 13typedef 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 */ 49