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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> | |
57c8a661 | 10 | #include <linux/memblock.h> |
1da177e4 | 11 | #include <linux/highmem.h> |
84fd089a | 12 | #include <asm/fixmap.h> |
1da177e4 | 13 | #include <asm/pgtable.h> |
6a1e5529 | 14 | #include <asm/pgalloc.h> |
35476311 | 15 | #include <asm/tlbflush.h> |
1da177e4 LT |
16 | |
17 | void pgd_init(unsigned long page) | |
18 | { | |
19 | unsigned long *p = (unsigned long *) page; | |
20 | int i; | |
21 | ||
22 | for (i = 0; i < USER_PTRS_PER_PGD; i+=8) { | |
23 | p[i + 0] = (unsigned long) invalid_pte_table; | |
24 | p[i + 1] = (unsigned long) invalid_pte_table; | |
25 | p[i + 2] = (unsigned long) invalid_pte_table; | |
26 | p[i + 3] = (unsigned long) invalid_pte_table; | |
27 | p[i + 4] = (unsigned long) invalid_pte_table; | |
28 | p[i + 5] = (unsigned long) invalid_pte_table; | |
29 | p[i + 6] = (unsigned long) invalid_pte_table; | |
30 | p[i + 7] = (unsigned long) invalid_pte_table; | |
31 | } | |
32 | } | |
33 | ||
35476311 DS |
34 | #if defined(CONFIG_TRANSPARENT_HUGEPAGE) |
35 | pmd_t mk_pmd(struct page *page, pgprot_t prot) | |
36 | { | |
37 | pmd_t pmd; | |
38 | ||
39 | pmd_val(pmd) = (page_to_pfn(page) << _PFN_SHIFT) | pgprot_val(prot); | |
40 | ||
41 | return pmd; | |
42 | } | |
43 | ||
44 | ||
45 | void set_pmd_at(struct mm_struct *mm, unsigned long addr, | |
46 | pmd_t *pmdp, pmd_t pmd) | |
47 | { | |
48 | *pmdp = pmd; | |
49 | flush_tlb_all(); | |
50 | } | |
51 | #endif /* defined(CONFIG_TRANSPARENT_HUGEPAGE) */ | |
52 | ||
1da177e4 LT |
53 | void __init pagetable_init(void) |
54 | { | |
1da177e4 | 55 | unsigned long vaddr; |
f8829cae RB |
56 | pgd_t *pgd_base; |
57 | #ifdef CONFIG_HIGHMEM | |
58 | pgd_t *pgd; | |
c6e8b587 | 59 | pud_t *pud; |
1da177e4 LT |
60 | pmd_t *pmd; |
61 | pte_t *pte; | |
62 | #endif | |
63 | ||
64 | /* Initialize the entire pgd. */ | |
65 | pgd_init((unsigned long)swapper_pg_dir); | |
66 | pgd_init((unsigned long)swapper_pg_dir | |
67 | + sizeof(pgd_t) * USER_PTRS_PER_PGD); | |
68 | ||
1da177e4 LT |
69 | pgd_base = swapper_pg_dir; |
70 | ||
71 | /* | |
72 | * Fixed mappings: | |
73 | */ | |
71eb989a MN |
74 | vaddr = __fix_to_virt(__end_of_fixed_addresses - 1); |
75 | fixrange_init(vaddr & PMD_MASK, vaddr + FIXADDR_SIZE, pgd_base); | |
1da177e4 | 76 | |
f8829cae | 77 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
78 | /* |
79 | * Permanent kmaps: | |
80 | */ | |
81 | vaddr = PKMAP_BASE; | |
71eb989a | 82 | fixrange_init(vaddr & PMD_MASK, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base); |
1da177e4 LT |
83 | |
84 | pgd = swapper_pg_dir + __pgd_offset(vaddr); | |
c6e8b587 RB |
85 | pud = pud_offset(pgd, vaddr); |
86 | pmd = pmd_offset(pud, vaddr); | |
1da177e4 LT |
87 | pte = pte_offset_kernel(pmd, vaddr); |
88 | pkmap_page_table = pte; | |
89 | #endif | |
90 | } |