Commit | Line | Data |
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1da177e4 LT |
1 | /* sun3_pgalloc.h -- |
2 | * reorganization around 2.3.39, routines moved from sun3_pgtable.h | |
3 | * | |
4 | * | |
5 | * 02/27/2002 -- Modified to support "highpte" implementation in 2.5.5 (Sam) | |
6 | * | |
7 | * moved 1/26/2000 Sam Creasey | |
8 | */ | |
9 | ||
10 | #ifndef _SUN3_PGALLOC_H | |
11 | #define _SUN3_PGALLOC_H | |
12 | ||
13 | #include <asm/tlb.h> | |
14 | ||
15 | /* FIXME - when we get this compiling */ | |
16 | /* erm, now that it's compiling, what do we do with it? */ | |
17 | #define _KERNPG_TABLE 0 | |
18 | ||
19 | extern const char bad_pmd_string[]; | |
20 | ||
21 | #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) | |
22 | ||
23 | ||
5e541973 | 24 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
1da177e4 LT |
25 | { |
26 | free_page((unsigned long) pte); | |
27 | } | |
28 | ||
2f569afd | 29 | static inline void pte_free(struct mm_struct *mm, pgtable_t page) |
1da177e4 | 30 | { |
2f569afd | 31 | pgtable_page_dtor(page); |
1da177e4 LT |
32 | __free_page(page); |
33 | } | |
34 | ||
2f569afd MS |
35 | #define __pte_free_tlb(tlb,pte) \ |
36 | do { \ | |
37 | pgtable_page_dtor(pte); \ | |
38 | tlb_remove_page((tlb), pte); \ | |
39 | } while (0) | |
1da177e4 LT |
40 | |
41 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
42 | unsigned long address) | |
43 | { | |
44 | unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT); | |
45 | ||
46 | if (!page) | |
47 | return NULL; | |
48 | ||
49 | memset((void *)page, 0, PAGE_SIZE); | |
50 | return (pte_t *) (page); | |
51 | } | |
52 | ||
2f569afd MS |
53 | static inline pgtable_t pte_alloc_one(struct mm_struct *mm, |
54 | unsigned long address) | |
1da177e4 LT |
55 | { |
56 | struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0); | |
57 | ||
58 | if (page == NULL) | |
59 | return NULL; | |
60 | ||
61 | clear_highpage(page); | |
2f569afd | 62 | pgtable_page_ctor(page); |
1da177e4 LT |
63 | return page; |
64 | ||
65 | } | |
66 | ||
67 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) | |
68 | { | |
69 | pmd_val(*pmd) = __pa((unsigned long)pte); | |
70 | } | |
71 | ||
2f569afd | 72 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page) |
1da177e4 LT |
73 | { |
74 | pmd_val(*pmd) = __pa((unsigned long)page_address(page)); | |
75 | } | |
2f569afd | 76 | #define pmd_pgtable(pmd) pmd_page(pmd) |
1da177e4 LT |
77 | |
78 | /* | |
79 | * allocating and freeing a pmd is trivial: the 1-entry pmd is | |
80 | * inside the pgd, so has no extra memory associated with it. | |
81 | */ | |
5e541973 | 82 | #define pmd_free(mm, x) do { } while (0) |
1da177e4 LT |
83 | #define __pmd_free_tlb(tlb, x) do { } while (0) |
84 | ||
5e541973 | 85 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
1da177e4 LT |
86 | { |
87 | free_page((unsigned long) pgd); | |
88 | } | |
89 | ||
90 | static inline pgd_t * pgd_alloc(struct mm_struct *mm) | |
91 | { | |
92 | pgd_t *new_pgd; | |
93 | ||
94 | new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL); | |
95 | memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE); | |
96 | memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT)); | |
97 | return new_pgd; | |
98 | } | |
99 | ||
100 | #define pgd_populate(mm, pmd, pte) BUG() | |
101 | ||
102 | #endif /* SUN3_PGALLOC_H */ |