1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
4 * Copyright 2003 PathScale, Inc.
5 * Derived from include/asm-i386/pgtable.h
6 */
7
8 #ifndef __UM_PGTABLE_2LEVEL_H
9 #define __UM_PGTABLE_2LEVEL_H
10
11 #include <asm-generic/pgtable-nopmd.h>
12
13 /* PGDIR_SHIFT determines what a third-level page table entry can map */
14
15 #define PGDIR_SHIFT 22
16 #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
17 #define PGDIR_MASK (~(PGDIR_SIZE-1))
18
19 /*
20 * entries per page directory level: the i386 is two-level, so
21 * we don't really have any PMD directory physically.
22 */
23 #define PTRS_PER_PTE 1024
24 #define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
25 #define PTRS_PER_PGD 1024
26
27 #define pte_ERROR(e) \
28 printk("%s:%d: bad pte %p(%08lx).\n", __FILE__, __LINE__, &(e), \
29 pte_val(e))
30 #define pgd_ERROR(e) \
31 printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), \
32 pgd_val(e))
33
34 static inline int pgd_newpage(pgd_t pgd) { return 0; }
35 static inline void pgd_mkuptodate(pgd_t pgd) { }
36
37 #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
38
39 #define pte_pfn(x) phys_to_pfn(pte_val(x))
40 #define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot))
41 #define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot))
42
43 #endif
44
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