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 */ 49