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1da177e4 LT |
1 | #ifndef __ASM_SH64_PGALLOC_H |
2 | #define __ASM_SH64_PGALLOC_H | |
3 | ||
4 | /* | |
5 | * This file is subject to the terms and conditions of the GNU General Public | |
6 | * License. See the file "COPYING" in the main directory of this archive | |
7 | * for more details. | |
8 | * | |
9 | * include/asm-sh64/pgalloc.h | |
10 | * | |
11 | * Copyright (C) 2000, 2001 Paolo Alberelli | |
12 | * Copyright (C) 2003, 2004 Paul Mundt | |
13 | * Copyright (C) 2003, 2004 Richard Curnow | |
14 | * | |
15 | */ | |
16 | ||
1da177e4 | 17 | #include <linux/mm.h> |
6c645ac7 PM |
18 | #include <linux/quicklist.h> |
19 | #include <asm/page.h> | |
1da177e4 LT |
20 | |
21 | static inline void pgd_init(unsigned long page) | |
22 | { | |
23 | unsigned long *pgd = (unsigned long *)page; | |
24 | extern pte_t empty_bad_pte_table[PTRS_PER_PTE]; | |
25 | int i; | |
26 | ||
27 | for (i = 0; i < USER_PTRS_PER_PGD; i++) | |
28 | pgd[i] = (unsigned long)empty_bad_pte_table; | |
29 | } | |
30 | ||
31 | /* | |
32 | * Allocate and free page tables. The xxx_kernel() versions are | |
33 | * used to allocate a kernel page table - this turns on ASN bits | |
34 | * if any. | |
35 | */ | |
36 | ||
ca5ed2f5 | 37 | static inline pgd_t *get_pgd_slow(void) |
1da177e4 LT |
38 | { |
39 | unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t)); | |
5cbded58 | 40 | pgd_t *ret = kmalloc(pgd_size, GFP_KERNEL); |
1da177e4 LT |
41 | return ret; |
42 | } | |
43 | ||
6c645ac7 | 44 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) |
1da177e4 | 45 | { |
6c645ac7 | 46 | return quicklist_alloc(0, GFP_KERNEL, NULL); |
1da177e4 LT |
47 | } |
48 | ||
6c645ac7 | 49 | static inline void pgd_free(pgd_t *pgd) |
1da177e4 | 50 | { |
6c645ac7 | 51 | quicklist_free(0, NULL, pgd); |
1da177e4 LT |
52 | } |
53 | ||
6c645ac7 PM |
54 | static inline struct page *pte_alloc_one(struct mm_struct *mm, |
55 | unsigned long address) | |
1da177e4 | 56 | { |
6c645ac7 PM |
57 | void *pg = quicklist_alloc(0, GFP_KERNEL, NULL); |
58 | return pg ? virt_to_page(pg) : NULL; | |
1da177e4 LT |
59 | } |
60 | ||
61 | static inline void pte_free_kernel(pte_t *pte) | |
62 | { | |
6c645ac7 | 63 | quicklist_free(0, NULL, pte); |
1da177e4 LT |
64 | } |
65 | ||
66 | static inline void pte_free(struct page *pte) | |
67 | { | |
6c645ac7 | 68 | quicklist_free_page(0, NULL, pte); |
1da177e4 LT |
69 | } |
70 | ||
71 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
72 | unsigned long address) | |
73 | { | |
6c645ac7 | 74 | return quicklist_alloc(0, GFP_KERNEL, NULL); |
1da177e4 LT |
75 | } |
76 | ||
77 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) | |
78 | ||
79 | /* | |
80 | * allocating and freeing a pmd is trivial: the 1-entry pmd is | |
81 | * inside the pgd, so has no extra memory associated with it. | |
82 | */ | |
83 | ||
84 | #if defined(CONFIG_SH64_PGTABLE_2_LEVEL) | |
85 | ||
86 | #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) | |
87 | #define pmd_free(x) do { } while (0) | |
88 | #define pgd_populate(mm, pmd, pte) BUG() | |
89 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) | |
90 | #define __pmd_free_tlb(tlb,pmd) do { } while (0) | |
91 | ||
92 | #elif defined(CONFIG_SH64_PGTABLE_3_LEVEL) | |
93 | ||
6c645ac7 | 94 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) |
1da177e4 | 95 | { |
6c645ac7 | 96 | return quicklist_alloc(0, GFP_KERNEL, NULL); |
1da177e4 LT |
97 | } |
98 | ||
6c645ac7 | 99 | static inline void pmd_free(pmd_t *pmd) |
1da177e4 | 100 | { |
6c645ac7 | 101 | quicklist_free(0, NULL, pmd); |
1da177e4 LT |
102 | } |
103 | ||
6c645ac7 | 104 | #define pgd_populate(mm, pgd, pmd) pgd_set(pgd, pmd) |
1da177e4 LT |
105 | #define __pmd_free_tlb(tlb,pmd) pmd_free(pmd) |
106 | ||
107 | #else | |
108 | #error "No defined page table size" | |
109 | #endif | |
110 | ||
1da177e4 LT |
111 | #define pmd_populate_kernel(mm, pmd, pte) \ |
112 | set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) (pte))) | |
113 | ||
114 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, | |
115 | struct page *pte) | |
116 | { | |
117 | set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) page_address (pte))); | |
118 | } | |
119 | ||
6c645ac7 PM |
120 | static inline void check_pgt_cache(void) |
121 | { | |
122 | quicklist_trim(0, NULL, 25, 16); | |
123 | } | |
124 | ||
1da177e4 | 125 | #endif /* __ASM_SH64_PGALLOC_H */ |