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Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -07001/*
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
19static __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 */
28static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
29{
30 unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
Robert P. J. Day5cbded52006-12-13 00:35:56 -080031 pgd_t *pgd = kmalloc(pgd_size, GFP_KERNEL);
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -070032
33 if (pgd)
34 memset(pgd, 0, pgd_size);
35
36 return pgd;
37}
38
39static inline void pgd_free(pgd_t *pgd)
40{
41 kfree(pgd);
42}
43
44static 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
63static 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
82static inline void pte_free_kernel(pte_t *pte)
83{
84 free_page((unsigned long)pte);
85}
86
87static 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 */