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
pmd_populate_kernel(struct mm_struct * mm,pmd_t * pmd,pte_t * pte)21 static 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
pmd_populate(struct mm_struct * mm,pmd_t * pmd,pgtable_t pte)27 static 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 #define pmd_pgtable(pmd) pmd_page(pmd)
33
34 /*
35 * Initialize a new pmd table with invalid pointers.
36 */
37 extern void pmd_init(unsigned long page, unsigned long pagetable);
38
39 #ifndef __PAGETABLE_PMD_FOLDED
40
pud_populate(struct mm_struct * mm,pud_t * pud,pmd_t * pmd)41 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
42 {
43 set_pud(pud, __pud((unsigned long)pmd));
44 }
45 #endif
46
47 /*
48 * Initialize a new pgd / pmd table with invalid pointers.
49 */
50 extern void pgd_init(unsigned long page);
51 extern pgd_t *pgd_alloc(struct mm_struct *mm);
52
pgd_free(struct mm_struct * mm,pgd_t * pgd)53 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
54 {
55 free_pages((unsigned long)pgd, PGD_ORDER);
56 }
57
58 #define __pte_free_tlb(tlb,pte,address) \
59 do { \
60 pgtable_pte_page_dtor(pte); \
61 tlb_remove_page((tlb), pte); \
62 } while (0)
63
64 #ifndef __PAGETABLE_PMD_FOLDED
65
pmd_alloc_one(struct mm_struct * mm,unsigned long address)66 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
67 {
68 pmd_t *pmd;
69 struct page *pg;
70
71 pg = alloc_pages(GFP_KERNEL_ACCOUNT, PMD_ORDER);
72 if (!pg)
73 return NULL;
74
75 if (!pgtable_pmd_page_ctor(pg)) {
76 __free_pages(pg, PMD_ORDER);
77 return NULL;
78 }
79
80 pmd = (pmd_t *)page_address(pg);
81 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
82 return pmd;
83 }
84
85 #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
86
87 #endif
88
89 #ifndef __PAGETABLE_PUD_FOLDED
90
pud_alloc_one(struct mm_struct * mm,unsigned long address)91 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
92 {
93 pud_t *pud;
94
95 pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER);
96 if (pud)
97 pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table);
98 return pud;
99 }
100
p4d_populate(struct mm_struct * mm,p4d_t * p4d,pud_t * pud)101 static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
102 {
103 set_p4d(p4d, __p4d((unsigned long)pud));
104 }
105
106 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
107
108 #endif /* __PAGETABLE_PUD_FOLDED */
109
110 extern void pagetable_init(void);
111
112 #endif /* _ASM_PGALLOC_H */
113