Commit | Line | Data |
---|---|---|
5f97f7f9 HS |
1 | /* |
2 | * Copyright (C) 2004-2006 Atmel Corporation | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | */ | |
8 | #ifndef __ASM_AVR32_PGALLOC_H | |
9 | #define __ASM_AVR32_PGALLOC_H | |
10 | ||
11 | #include <asm/processor.h> | |
12 | #include <linux/threads.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/mm.h> | |
15 | ||
16 | #define pmd_populate_kernel(mm, pmd, pte) \ | |
17 | set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))) | |
18 | ||
19 | static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd, | |
20 | struct page *pte) | |
21 | { | |
22 | set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte))); | |
23 | } | |
24 | ||
25 | /* | |
26 | * Allocate and free page tables | |
27 | */ | |
28 | static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm) | |
29 | { | |
30 | unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t)); | |
31 | pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL); | |
32 | ||
33 | if (pgd) | |
34 | memset(pgd, 0, pgd_size); | |
35 | ||
36 | return pgd; | |
37 | } | |
38 | ||
39 | static inline void pgd_free(pgd_t *pgd) | |
40 | { | |
41 | kfree(pgd); | |
42 | } | |
43 | ||
44 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
45 | unsigned long address) | |
46 | { | |
47 | int count = 0; | |
48 | pte_t *pte; | |
49 | ||
50 | do { | |
51 | pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT); | |
52 | if (pte) | |
53 | clear_page(pte); | |
54 | else { | |
55 | current->state = TASK_UNINTERRUPTIBLE; | |
56 | schedule_timeout(HZ); | |
57 | } | |
58 | } while (!pte && (count++ < 10)); | |
59 | ||
60 | return pte; | |
61 | } | |
62 | ||
63 | static inline struct page *pte_alloc_one(struct mm_struct *mm, | |
64 | unsigned long address) | |
65 | { | |
66 | int count = 0; | |
67 | struct page *pte; | |
68 | ||
69 | do { | |
70 | pte = alloc_pages(GFP_KERNEL, 0); | |
71 | if (pte) | |
72 | clear_page(page_address(pte)); | |
73 | else { | |
74 | current->state = TASK_UNINTERRUPTIBLE; | |
75 | schedule_timeout(HZ); | |
76 | } | |
77 | } while (!pte && (count++ < 10)); | |
78 | ||
79 | return pte; | |
80 | } | |
81 | ||
82 | static inline void pte_free_kernel(pte_t *pte) | |
83 | { | |
84 | free_page((unsigned long)pte); | |
85 | } | |
86 | ||
87 | static inline void pte_free(struct page *pte) | |
88 | { | |
89 | __free_page(pte); | |
90 | } | |
91 | ||
92 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) | |
93 | ||
94 | #define check_pgt_cache() do { } while(0) | |
95 | ||
96 | #endif /* __ASM_AVR32_PGALLOC_H */ |