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 #include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */
17
pmd_populate_kernel(struct mm_struct * mm,pmd_t * pmd,pte_t * pte)18 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
19 pte_t *pte)
20 {
21 set_pmd(pmd, __pmd((unsigned long)pte));
22 }
23
pmd_populate(struct mm_struct * mm,pmd_t * pmd,pgtable_t pte)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 /*
32 * Initialize a new pmd table with invalid pointers.
33 */
34 extern void pmd_init(unsigned long page, unsigned long pagetable);
35
36 #ifndef __PAGETABLE_PMD_FOLDED
37
pud_populate(struct mm_struct * mm,pud_t * pud,pmd_t * pmd)38 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
39 {
40 set_pud(pud, __pud((unsigned long)pmd));
41 }
42 #endif
43
44 /*
45 * Initialize a new pgd / pmd table with invalid pointers.
46 */
47 extern void pgd_init(unsigned long page);
48 extern pgd_t *pgd_alloc(struct mm_struct *mm);
49
pgd_free(struct mm_struct * mm,pgd_t * pgd)50 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
51 {
52 free_pages((unsigned long)pgd, PGD_ORDER);
53 }
54
55 #define __pte_free_tlb(tlb,pte,address) \
56 do { \
57 pgtable_pte_page_dtor(pte); \
58 tlb_remove_page((tlb), pte); \
59 } while (0)
60
61 #ifndef __PAGETABLE_PMD_FOLDED
62
pmd_alloc_one(struct mm_struct * mm,unsigned long address)63 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
64 {
65 pmd_t *pmd;
66
67 pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
68 if (pmd)
69 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
70 return pmd;
71 }
72
pmd_free(struct mm_struct * mm,pmd_t * pmd)73 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
74 {
75 free_pages((unsigned long)pmd, PMD_ORDER);
76 }
77
78 #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
79
80 #endif
81
82 #ifndef __PAGETABLE_PUD_FOLDED
83
pud_alloc_one(struct mm_struct * mm,unsigned long address)84 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
85 {
86 pud_t *pud;
87
88 pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER);
89 if (pud)
90 pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table);
91 return pud;
92 }
93
pud_free(struct mm_struct * mm,pud_t * pud)94 static inline void pud_free(struct mm_struct *mm, pud_t *pud)
95 {
96 free_pages((unsigned long)pud, PUD_ORDER);
97 }
98
pgd_populate(struct mm_struct * mm,pgd_t * pgd,pud_t * pud)99 static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
100 {
101 set_pgd(pgd, __pgd((unsigned long)pud));
102 }
103
104 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
105
106 #endif /* __PAGETABLE_PUD_FOLDED */
107
108 extern void pagetable_init(void);
109
110 #endif /* _ASM_PGALLOC_H */
111