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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) 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 | 13 | #include <asm/pgtable.h> |
6a1e5529 | 14 | #include <asm/pgalloc.h> |
1da177e4 LT |
15 | |
16 | void pgd_init(unsigned long page) | |
17 | { | |
18 | unsigned long *p = (unsigned long *) page; | |
19 | int i; | |
20 | ||
21 | for (i = 0; i < USER_PTRS_PER_PGD; i+=8) { | |
22 | p[i + 0] = (unsigned long) invalid_pte_table; | |
23 | p[i + 1] = (unsigned long) invalid_pte_table; | |
24 | p[i + 2] = (unsigned long) invalid_pte_table; | |
25 | p[i + 3] = (unsigned long) invalid_pte_table; | |
26 | p[i + 4] = (unsigned long) invalid_pte_table; | |
27 | p[i + 5] = (unsigned long) invalid_pte_table; | |
28 | p[i + 6] = (unsigned long) invalid_pte_table; | |
29 | p[i + 7] = (unsigned long) invalid_pte_table; | |
30 | } | |
31 | } | |
32 | ||
1da177e4 LT |
33 | void __init pagetable_init(void) |
34 | { | |
1da177e4 | 35 | unsigned long vaddr; |
f8829cae RB |
36 | pgd_t *pgd_base; |
37 | #ifdef CONFIG_HIGHMEM | |
38 | pgd_t *pgd; | |
c6e8b587 | 39 | pud_t *pud; |
1da177e4 LT |
40 | pmd_t *pmd; |
41 | pte_t *pte; | |
42 | #endif | |
43 | ||
44 | /* Initialize the entire pgd. */ | |
45 | pgd_init((unsigned long)swapper_pg_dir); | |
46 | pgd_init((unsigned long)swapper_pg_dir | |
47 | + sizeof(pgd_t) * USER_PTRS_PER_PGD); | |
48 | ||
1da177e4 LT |
49 | pgd_base = swapper_pg_dir; |
50 | ||
51 | /* | |
52 | * Fixed mappings: | |
53 | */ | |
54 | vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; | |
464fd83e | 55 | fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base); |
1da177e4 | 56 | |
f8829cae | 57 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
58 | /* |
59 | * Permanent kmaps: | |
60 | */ | |
61 | vaddr = PKMAP_BASE; | |
62 | fixrange_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base); | |
63 | ||
64 | pgd = swapper_pg_dir + __pgd_offset(vaddr); | |
c6e8b587 RB |
65 | pud = pud_offset(pgd, vaddr); |
66 | pmd = pmd_offset(pud, vaddr); | |
1da177e4 LT |
67 | pte = pte_offset_kernel(pmd, vaddr); |
68 | pkmap_page_table = pte; | |
69 | #endif | |
70 | } |