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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 | ||
24 | static inline void pte_free_kernel(pte_t * pte) | |
25 | { | |
26 | free_page((unsigned long) pte); | |
27 | } | |
28 | ||
29 | static inline void pte_free(struct page *page) | |
30 | { | |
31 | __free_page(page); | |
32 | } | |
33 | ||
34 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) | |
35 | ||
36 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
37 | unsigned long address) | |
38 | { | |
39 | unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT); | |
40 | ||
41 | if (!page) | |
42 | return NULL; | |
43 | ||
44 | memset((void *)page, 0, PAGE_SIZE); | |
45 | return (pte_t *) (page); | |
46 | } | |
47 | ||
48 | static inline struct page *pte_alloc_one(struct mm_struct *mm, | |
49 | unsigned long address) | |
50 | { | |
51 | struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0); | |
52 | ||
53 | if (page == NULL) | |
54 | return NULL; | |
55 | ||
56 | clear_highpage(page); | |
57 | return page; | |
58 | ||
59 | } | |
60 | ||
61 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) | |
62 | { | |
63 | pmd_val(*pmd) = __pa((unsigned long)pte); | |
64 | } | |
65 | ||
66 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page) | |
67 | { | |
68 | pmd_val(*pmd) = __pa((unsigned long)page_address(page)); | |
69 | } | |
70 | ||
71 | /* | |
72 | * allocating and freeing a pmd is trivial: the 1-entry pmd is | |
73 | * inside the pgd, so has no extra memory associated with it. | |
74 | */ | |
75 | #define pmd_free(x) do { } while (0) | |
76 | #define __pmd_free_tlb(tlb, x) do { } while (0) | |
77 | ||
78 | static inline void pgd_free(pgd_t * pgd) | |
79 | { | |
80 | free_page((unsigned long) pgd); | |
81 | } | |
82 | ||
83 | static inline pgd_t * pgd_alloc(struct mm_struct *mm) | |
84 | { | |
85 | pgd_t *new_pgd; | |
86 | ||
87 | new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL); | |
88 | memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE); | |
89 | memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT)); | |
90 | return new_pgd; | |
91 | } | |
92 | ||
93 | #define pgd_populate(mm, pmd, pte) BUG() | |
94 | ||
95 | #endif /* SUN3_PGALLOC_H */ |