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 #define __ARCH_USE_5LEVEL_HACK
12 #include <asm-generic/pgtable-nopmd.h>
13
14 /* PGDIR_SHIFT determines what a third-level page table entry can map */
15
16 #define PGDIR_SHIFT 22
17 #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
18 #define PGDIR_MASK (~(PGDIR_SIZE-1))
19
20 /*
21 * entries per page directory level: the i386 is two-level, so
22 * we don't really have any PMD directory physically.
23 */
24 #define PTRS_PER_PTE 1024
25 #define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
26 #define PTRS_PER_PGD 1024
27 #define FIRST_USER_ADDRESS 0UL
28
29 #define pte_ERROR(e) \
30 printk("%s:%d: bad pte %p(%08lx).\n", __FILE__, __LINE__, &(e), \
31 pte_val(e))
32 #define pgd_ERROR(e) \
33 printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), \
34 pgd_val(e))
35
pgd_newpage(pgd_t pgd)36 static inline int pgd_newpage(pgd_t pgd) { return 0; }
pgd_mkuptodate(pgd_t pgd)37 static inline void pgd_mkuptodate(pgd_t pgd) { }
38
39 #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
40
41 #define pte_pfn(x) phys_to_pfn(pte_val(x))
42 #define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot))
43 #define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot))
44
45 #endif
46