1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_PGTABLE_2LEVEL_DEFS_H
3 #define _ASM_X86_PGTABLE_2LEVEL_DEFS_H
4 
5 #ifndef __ASSEMBLY__
6 #include <linux/types.h>
7 
8 typedef unsigned long	pteval_t;
9 typedef unsigned long	pmdval_t;
10 typedef unsigned long	pudval_t;
11 typedef unsigned long	p4dval_t;
12 typedef unsigned long	pgdval_t;
13 typedef unsigned long	pgprotval_t;
14 
15 typedef union {
16 	pteval_t pte;
17 	pteval_t pte_low;
18 } pte_t;
19 #endif	/* !__ASSEMBLY__ */
20 
21 #define SHARED_KERNEL_PMD	0
22 
23 #define ARCH_PAGE_TABLE_SYNC_MASK	PGTBL_PMD_MODIFIED
24 
25 /*
26  * traditional i386 two-level paging structure:
27  */
28 
29 #define PGDIR_SHIFT	22
30 #define PTRS_PER_PGD	1024
31 
32 
33 /*
34  * the i386 is two-level, so we don't really have any
35  * PMD directory physically.
36  */
37 
38 #define PTRS_PER_PTE	1024
39 
40 /* This covers all VMSPLIT_* and VMSPLIT_*_OPT variants */
41 #define PGD_KERNEL_START	(CONFIG_PAGE_OFFSET >> PGDIR_SHIFT)
42 
43 #endif /* _ASM_X86_PGTABLE_2LEVEL_DEFS_H */
44