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) 2003 by Ralf Baechle | |
7 | */ | |
1da177e4 LT |
8 | #include <linux/init.h> |
9 | #include <linux/mm.h> | |
10 | #include <linux/bootmem.h> | |
11 | #include <linux/highmem.h> | |
84fd089a | 12 | #include <asm/fixmap.h> |
1da177e4 LT |
13 | #include <asm/pgtable.h> |
14 | ||
15 | void pgd_init(unsigned long page) | |
16 | { | |
17 | unsigned long *p = (unsigned long *) page; | |
18 | int i; | |
19 | ||
20 | for (i = 0; i < USER_PTRS_PER_PGD; i+=8) { | |
21 | p[i + 0] = (unsigned long) invalid_pte_table; | |
22 | p[i + 1] = (unsigned long) invalid_pte_table; | |
23 | p[i + 2] = (unsigned long) invalid_pte_table; | |
24 | p[i + 3] = (unsigned long) invalid_pte_table; | |
25 | p[i + 4] = (unsigned long) invalid_pte_table; | |
26 | p[i + 5] = (unsigned long) invalid_pte_table; | |
27 | p[i + 6] = (unsigned long) invalid_pte_table; | |
28 | p[i + 7] = (unsigned long) invalid_pte_table; | |
29 | } | |
30 | } | |
31 | ||
1da177e4 LT |
32 | void __init pagetable_init(void) |
33 | { | |
34 | #ifdef CONFIG_HIGHMEM | |
35 | unsigned long vaddr; | |
36 | pgd_t *pgd, *pgd_base; | |
c6e8b587 | 37 | pud_t *pud; |
1da177e4 LT |
38 | pmd_t *pmd; |
39 | pte_t *pte; | |
40 | #endif | |
41 | ||
42 | /* Initialize the entire pgd. */ | |
43 | pgd_init((unsigned long)swapper_pg_dir); | |
44 | pgd_init((unsigned long)swapper_pg_dir | |
45 | + sizeof(pgd_t) * USER_PTRS_PER_PGD); | |
46 | ||
47 | #ifdef CONFIG_HIGHMEM | |
48 | pgd_base = swapper_pg_dir; | |
49 | ||
50 | /* | |
51 | * Fixed mappings: | |
52 | */ | |
53 | vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; | |
54 | fixrange_init(vaddr, 0, pgd_base); | |
55 | ||
56 | /* | |
57 | * Permanent kmaps: | |
58 | */ | |
59 | vaddr = PKMAP_BASE; | |
60 | fixrange_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base); | |
61 | ||
62 | pgd = swapper_pg_dir + __pgd_offset(vaddr); | |
c6e8b587 RB |
63 | pud = pud_offset(pgd, vaddr); |
64 | pmd = pmd_offset(pud, vaddr); | |
1da177e4 LT |
65 | pte = pte_offset_kernel(pmd, vaddr); |
66 | pkmap_page_table = pte; | |
67 | #endif | |
68 | } |