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 #define MAX_POSSIBLE_PHYSMEM_BITS 36 48 49 #endif /* _ASM_X86_PGTABLE_3LEVEL_DEFS_H */ 50