blob: 78eaa4f0b0eccd4980ad1fa692343e76e50e63e3 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1999, 2000 by Silicon Graphics
7 * Copyright (C) 2003 by Ralf Baechle
8 */
9#include <linux/init.h>
10#include <linux/mm.h>
Ralf Baechlef8829ca2006-10-21 23:17:35 +010011#include <asm/fixmap.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <asm/pgtable.h>
Atsushi Nemoto6a1e5522007-02-19 01:27:34 +090013#include <asm/pgalloc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014
15void pgd_init(unsigned long page)
16{
17 unsigned long *p, *end;
David Daney325f8a02009-12-04 13:52:36 -080018 unsigned long entry;
19
20#ifdef __PAGETABLE_PMD_FOLDED
21 entry = (unsigned long)invalid_pte_table;
22#else
23 entry = (unsigned long)invalid_pmd_table;
24#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
26 p = (unsigned long *) page;
27 end = p + PTRS_PER_PGD;
28
29 while (p < end) {
David Daney325f8a02009-12-04 13:52:36 -080030 p[0] = entry;
31 p[1] = entry;
32 p[2] = entry;
33 p[3] = entry;
34 p[4] = entry;
35 p[5] = entry;
36 p[6] = entry;
37 p[7] = entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 p += 8;
39 }
40}
41
David Daney325f8a02009-12-04 13:52:36 -080042#ifndef __PAGETABLE_PMD_FOLDED
Linus Torvalds1da177e2005-04-16 15:20:36 -070043void pmd_init(unsigned long addr, unsigned long pagetable)
44{
45 unsigned long *p, *end;
46
47 p = (unsigned long *) addr;
48 end = p + PTRS_PER_PMD;
49
50 while (p < end) {
David Daney325f8a02009-12-04 13:52:36 -080051 p[0] = pagetable;
52 p[1] = pagetable;
53 p[2] = pagetable;
54 p[3] = pagetable;
55 p[4] = pagetable;
56 p[5] = pagetable;
57 p[6] = pagetable;
58 p[7] = pagetable;
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 p += 8;
60 }
61}
David Daney325f8a02009-12-04 13:52:36 -080062#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64void __init pagetable_init(void)
65{
Ralf Baechlef8829ca2006-10-21 23:17:35 +010066 unsigned long vaddr;
67 pgd_t *pgd_base;
68
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 /* Initialize the entire pgd. */
70 pgd_init((unsigned long)swapper_pg_dir);
David Daney325f8a02009-12-04 13:52:36 -080071#ifndef __PAGETABLE_PMD_FOLDED
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table);
David Daney325f8a02009-12-04 13:52:36 -080073#endif
Ralf Baechlef8829ca2006-10-21 23:17:35 +010074 pgd_base = swapper_pg_dir;
75 /*
76 * Fixed mappings:
77 */
78 vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
79 fixrange_init(vaddr, 0, pgd_base);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080}