Merge branch 'topic/usb-audio' into for-linus
[pandora-kernel.git] / arch / avr32 / include / asm / pgalloc.h
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 <linux/quicklist.h>
12 #include <asm/page.h>
13 #include <asm/pgtable.h>
14
15 #define QUICK_PGD       0       /* Preserve kernel mappings over free */
16 #define QUICK_PT        1       /* Zero on free */
17
18 static inline void pmd_populate_kernel(struct mm_struct *mm,
19                                        pmd_t *pmd, pte_t *pte)
20 {
21         set_pmd(pmd, __pmd((unsigned long)pte));
22 }
23
24 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
25                                     pgtable_t pte)
26 {
27         set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
28 }
29 #define pmd_pgtable(pmd) pmd_page(pmd)
30
31 static inline void pgd_ctor(void *x)
32 {
33         pgd_t *pgd = x;
34
35         memcpy(pgd + USER_PTRS_PER_PGD,
36                 swapper_pg_dir + USER_PTRS_PER_PGD,
37                 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
38 }
39
40 /*
41  * Allocate and free page tables
42  */
43 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
44 {
45         return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
46 }
47
48 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
49 {
50         quicklist_free(QUICK_PGD, NULL, pgd);
51 }
52
53 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
54                                           unsigned long address)
55 {
56         return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
57 }
58
59 static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
60                                          unsigned long address)
61 {
62         struct page *page;
63         void *pg;
64
65         pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
66         if (!pg)
67                 return NULL;
68
69         page = virt_to_page(pg);
70         pgtable_page_ctor(page);
71
72         return page;
73 }
74
75 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
76 {
77         quicklist_free(QUICK_PT, NULL, pte);
78 }
79
80 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
81 {
82         pgtable_page_dtor(pte);
83         quicklist_free_page(QUICK_PT, NULL, pte);
84 }
85
86 #define __pte_free_tlb(tlb,pte,addr)                    \
87 do {                                                    \
88         pgtable_page_dtor(pte);                         \
89         tlb_remove_page((tlb), pte);                    \
90 } while (0)
91
92 static inline void check_pgt_cache(void)
93 {
94         quicklist_trim(QUICK_PGD, NULL, 25, 16);
95         quicklist_trim(QUICK_PT, NULL, 25, 16);
96 }
97
98 #endif /* __ASM_AVR32_PGALLOC_H */