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1da177e4 LT |
1 | #ifndef __ASM_SH_PGALLOC_H |
2 | #define __ASM_SH_PGALLOC_H | |
3 | ||
4 | #include <linux/threads.h> | |
5 | #include <linux/slab.h> | |
6 | #include <linux/mm.h> | |
7 | ||
8 | #define pgd_quicklist ((unsigned long *)0) | |
9 | #define pmd_quicklist ((unsigned long *)0) | |
10 | #define pte_quicklist ((unsigned long *)0) | |
11 | #define pgtable_cache_size 0L | |
12 | ||
13 | #define pmd_populate_kernel(mm, pmd, pte) \ | |
14 | set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))) | |
15 | ||
16 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, | |
17 | struct page *pte) | |
18 | { | |
19 | set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte))); | |
20 | } | |
21 | ||
22 | /* | |
23 | * Allocate and free page tables. | |
24 | */ | |
25 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | |
26 | { | |
27 | unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t)); | |
28 | pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL); | |
29 | ||
30 | if (pgd) | |
31 | memset(pgd, 0, pgd_size); | |
32 | ||
33 | return pgd; | |
34 | } | |
35 | ||
36 | static inline void pgd_free(pgd_t *pgd) | |
37 | { | |
38 | kfree(pgd); | |
39 | } | |
40 | ||
41 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
42 | unsigned long address) | |
43 | { | |
44 | pte_t *pte; | |
45 | ||
46 | pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); | |
47 | ||
48 | return pte; | |
49 | } | |
50 | ||
51 | static inline struct page *pte_alloc_one(struct mm_struct *mm, | |
52 | unsigned long address) | |
53 | { | |
54 | struct page *pte; | |
55 | ||
56 | pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0); | |
57 | ||
58 | return pte; | |
59 | } | |
60 | ||
61 | static inline void pte_free_kernel(pte_t *pte) | |
62 | { | |
63 | free_page((unsigned long)pte); | |
64 | } | |
65 | ||
66 | static inline void pte_free(struct page *pte) | |
67 | { | |
68 | __free_page(pte); | |
69 | } | |
70 | ||
71 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) | |
72 | ||
73 | /* | |
74 | * allocating and freeing a pmd is trivial: the 1-entry pmd is | |
75 | * inside the pgd, so has no extra memory associated with it. | |
76 | */ | |
77 | ||
78 | #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) | |
79 | #define pmd_free(x) do { } while (0) | |
80 | #define __pmd_free_tlb(tlb,x) do { } while (0) | |
81 | #define pgd_populate(mm, pmd, pte) BUG() | |
82 | #define check_pgt_cache() do { } while (0) | |
83 | ||
84 | #ifdef CONFIG_CPU_SH4 | |
85 | #define PG_mapped PG_arch_1 | |
86 | #endif | |
87 | ||
88 | #endif /* __ASM_SH_PGALLOC_H */ |