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1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
7 * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
8 */
9#ifndef _ASM_PGALLOC_H
10#define _ASM_PGALLOC_H
11
12#include <linux/highmem.h>
13#include <linux/mm.h>
14#include <linux/sched.h>
15
16#define __HAVE_ARCH_PMD_ALLOC_ONE
17#define __HAVE_ARCH_PUD_ALLOC_ONE
18#define __HAVE_ARCH_PGD_FREE
19#include <asm-generic/pgalloc.h>
20
21static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
22 pte_t *pte)
23{
24 set_pmd(pmd, __pmd((unsigned long)pte));
25}
26
27static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
28 pgtable_t pte)
29{
30 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
31}
32
33/*
34 * Initialize a new pmd table with invalid pointers.
35 */
36extern void pmd_init(void *addr);
37
38#ifndef __PAGETABLE_PMD_FOLDED
39
40static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
41{
42 set_pud(pud, __pud((unsigned long)pmd));
43}
44#endif
45
46/*
47 * Initialize a new pgd table with invalid pointers.
48 */
49extern void pgd_init(void *addr);
50extern pgd_t *pgd_alloc(struct mm_struct *mm);
51
52static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
53{
54 free_pages((unsigned long)pgd, PGD_TABLE_ORDER);
55}
56
57#define __pte_free_tlb(tlb,pte,address) \
58do { \
59 pgtable_pte_page_dtor(pte); \
60 tlb_remove_page((tlb), pte); \
61} while (0)
62
63#ifndef __PAGETABLE_PMD_FOLDED
64
65static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
66{
67 pmd_t *pmd;
68 struct page *pg;
69
70 pg = alloc_pages(GFP_KERNEL_ACCOUNT, PMD_TABLE_ORDER);
71 if (!pg)
72 return NULL;
73
74 if (!pgtable_pmd_page_ctor(pg)) {
75 __free_pages(pg, PMD_TABLE_ORDER);
76 return NULL;
77 }
78
79 pmd = (pmd_t *)page_address(pg);
80 pmd_init(pmd);
81 return pmd;
82}
83
84#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
85
86#endif
87
88#ifndef __PAGETABLE_PUD_FOLDED
89
90static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
91{
92 pud_t *pud;
93
94 pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_TABLE_ORDER);
95 if (pud)
96 pud_init(pud);
97 return pud;
98}
99
100static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
101{
102 set_p4d(p4d, __p4d((unsigned long)pud));
103}
104
105#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
106
107#endif /* __PAGETABLE_PUD_FOLDED */
108
109extern void pagetable_init(void);
110
111#endif /* _ASM_PGALLOC_H */
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
7 * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
8 */
9#ifndef _ASM_PGALLOC_H
10#define _ASM_PGALLOC_H
11
12#include <linux/highmem.h>
13#include <linux/mm.h>
14#include <linux/sched.h>
15
16static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
17 pte_t *pte)
18{
19 set_pmd(pmd, __pmd((unsigned long)pte));
20}
21
22static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
23 pgtable_t pte)
24{
25 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
26}
27#define pmd_pgtable(pmd) pmd_page(pmd)
28
29/*
30 * Initialize a new pmd table with invalid pointers.
31 */
32extern void pmd_init(unsigned long page, unsigned long pagetable);
33
34#ifndef __PAGETABLE_PMD_FOLDED
35
36static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
37{
38 set_pud(pud, __pud((unsigned long)pmd));
39}
40#endif
41
42/*
43 * Initialize a new pgd / pmd table with invalid pointers.
44 */
45extern void pgd_init(unsigned long page);
46
47static inline pgd_t *pgd_alloc(struct mm_struct *mm)
48{
49 pgd_t *ret, *init;
50
51 ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
52 if (ret) {
53 init = pgd_offset(&init_mm, 0UL);
54 pgd_init((unsigned long)ret);
55 memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
56 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
57 }
58
59 return ret;
60}
61
62static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
63{
64 free_pages((unsigned long)pgd, PGD_ORDER);
65}
66
67static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
68 unsigned long address)
69{
70 return (pte_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, PTE_ORDER);
71}
72
73static inline struct page *pte_alloc_one(struct mm_struct *mm,
74 unsigned long address)
75{
76 struct page *pte;
77
78 pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
79 if (!pte)
80 return NULL;
81 clear_highpage(pte);
82 if (!pgtable_page_ctor(pte)) {
83 __free_page(pte);
84 return NULL;
85 }
86 return pte;
87}
88
89static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
90{
91 free_pages((unsigned long)pte, PTE_ORDER);
92}
93
94static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
95{
96 pgtable_page_dtor(pte);
97 __free_pages(pte, PTE_ORDER);
98}
99
100#define __pte_free_tlb(tlb,pte,address) \
101do { \
102 pgtable_page_dtor(pte); \
103 tlb_remove_page((tlb), pte); \
104} while (0)
105
106#ifndef __PAGETABLE_PMD_FOLDED
107
108static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
109{
110 pmd_t *pmd;
111
112 pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
113 if (pmd)
114 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
115 return pmd;
116}
117
118static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
119{
120 free_pages((unsigned long)pmd, PMD_ORDER);
121}
122
123#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
124
125#endif
126
127#define check_pgt_cache() do { } while (0)
128
129extern void pagetable_init(void);
130
131#endif /* _ASM_PGALLOC_H */