Commit | Line | Data |
---|---|---|
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; | |
325f8a0a DD |
18 | 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 | |
1da177e4 LT |
25 | |
26 | p = (unsigned long *) page; | |
27 | end = p + PTRS_PER_PGD; | |
28 | ||
29 | while (p < end) { | |
325f8a0a DD |
30 | 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; | |
1da177e4 LT |
38 | p += 8; |
39 | } | |
40 | } | |
41 | ||
325f8a0a | 42 | #ifndef __PAGETABLE_PMD_FOLDED |
1da177e4 LT |
43 | void 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) { | |
325f8a0a DD |
51 | 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; | |
1da177e4 LT |
59 | p += 8; |
60 | } | |
61 | } | |
325f8a0a | 62 | #endif |
1da177e4 LT |
63 | |
64 | void __init pagetable_init(void) | |
65 | { | |
f8829cae RB |
66 | unsigned long vaddr; |
67 | pgd_t *pgd_base; | |
68 | ||
1da177e4 LT |
69 | /* Initialize the entire pgd. */ |
70 | pgd_init((unsigned long)swapper_pg_dir); | |
325f8a0a | 71 | #ifndef __PAGETABLE_PMD_FOLDED |
1da177e4 | 72 | pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table); |
325f8a0a | 73 | #endif |
f8829cae RB |
74 | 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); | |
1da177e4 | 80 | } |