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1da177e4 LT |
1 | /* |
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> | |
f8829cae | 11 | #include <asm/fixmap.h> |
1da177e4 | 12 | #include <asm/pgtable.h> |
6a1e5529 | 13 | #include <asm/pgalloc.h> |
1da177e4 LT |
14 | |
15 | void pgd_init(unsigned long page) | |
16 | { | |
17 | unsigned long *p, *end; | |
18 | ||
19 | p = (unsigned long *) page; | |
20 | end = p + PTRS_PER_PGD; | |
21 | ||
22 | while (p < end) { | |
23 | p[0] = (unsigned long) invalid_pmd_table; | |
24 | p[1] = (unsigned long) invalid_pmd_table; | |
25 | p[2] = (unsigned long) invalid_pmd_table; | |
26 | p[3] = (unsigned long) invalid_pmd_table; | |
27 | p[4] = (unsigned long) invalid_pmd_table; | |
28 | p[5] = (unsigned long) invalid_pmd_table; | |
29 | p[6] = (unsigned long) invalid_pmd_table; | |
30 | p[7] = (unsigned long) invalid_pmd_table; | |
31 | p += 8; | |
32 | } | |
33 | } | |
34 | ||
35 | void pmd_init(unsigned long addr, unsigned long pagetable) | |
36 | { | |
37 | unsigned long *p, *end; | |
38 | ||
39 | p = (unsigned long *) addr; | |
40 | end = p + PTRS_PER_PMD; | |
41 | ||
42 | while (p < end) { | |
43 | p[0] = (unsigned long)pagetable; | |
44 | p[1] = (unsigned long)pagetable; | |
45 | p[2] = (unsigned long)pagetable; | |
46 | p[3] = (unsigned long)pagetable; | |
47 | p[4] = (unsigned long)pagetable; | |
48 | p[5] = (unsigned long)pagetable; | |
49 | p[6] = (unsigned long)pagetable; | |
50 | p[7] = (unsigned long)pagetable; | |
51 | p += 8; | |
52 | } | |
53 | } | |
54 | ||
55 | void __init pagetable_init(void) | |
56 | { | |
f8829cae RB |
57 | unsigned long vaddr; |
58 | pgd_t *pgd_base; | |
59 | ||
1da177e4 LT |
60 | /* Initialize the entire pgd. */ |
61 | pgd_init((unsigned long)swapper_pg_dir); | |
62 | pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table); | |
f8829cae RB |
63 | |
64 | pgd_base = swapper_pg_dir; | |
65 | /* | |
66 | * Fixed mappings: | |
67 | */ | |
68 | vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; | |
69 | fixrange_init(vaddr, 0, pgd_base); | |
1da177e4 | 70 | } |