pgtable-2level_types.h

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