1#ifndef _I386_PGTABLE_3LEVEL_DEFS_H 2#define _I386_PGTABLE_3LEVEL_DEFS_H 3 4/* 5 * PGDIR_SHIFT determines what a top-level page table entry can map 6 */ 7#define PGDIR_SHIFT 30 8#define PTRS_PER_PGD 4 9 10/* 11 * PMD_SHIFT determines the size of the area a middle-level 12 * page table can map 13 */ 14#define PMD_SHIFT 21 15#define PTRS_PER_PMD 512 16 17/* 18 * entries per page directory level 19 */ 20#define PTRS_PER_PTE 512 21 22#endif /* _I386_PGTABLE_3LEVEL_DEFS_H */ 23