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 #include <asm-generic/pgalloc.h>
19
pmd_populate_kernel(struct mm_struct * mm,pmd_t * pmd,pte_t * pte)20 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
21 pte_t *pte)
22 {
23 set_pmd(pmd, __pmd((unsigned long)pte));
24 }
25
pmd_populate(struct mm_struct * mm,pmd_t * pmd,pgtable_t pte)26 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
27 pgtable_t pte)
28 {
29 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
30 }
31
32 /*
33 * Initialize a new pmd table with invalid pointers.
34 */
35 extern void pmd_init(void *addr);
36
37 #ifndef __PAGETABLE_PMD_FOLDED
38
pud_populate(struct mm_struct * mm,pud_t * pud,pmd_t * pmd)39 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
40 {
41 set_pud(pud, __pud((unsigned long)pmd));
42 }
43 #endif
44
45 /*
46 * Initialize a new pgd table with invalid pointers.
47 */
48 extern void pgd_init(void *addr);
49 extern pgd_t *pgd_alloc(struct mm_struct *mm);
50
51 #define __pte_free_tlb(tlb, pte, address) \
52 tlb_remove_ptdesc((tlb), page_ptdesc(pte))
53
54 #ifndef __PAGETABLE_PMD_FOLDED
55
pmd_alloc_one(struct mm_struct * mm,unsigned long address)56 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
57 {
58 pmd_t *pmd;
59 struct ptdesc *ptdesc;
60
61 ptdesc = pagetable_alloc(GFP_KERNEL_ACCOUNT, PMD_TABLE_ORDER);
62 if (!ptdesc)
63 return NULL;
64
65 if (!pagetable_pmd_ctor(ptdesc)) {
66 pagetable_free(ptdesc);
67 return NULL;
68 }
69
70 pmd = ptdesc_address(ptdesc);
71 pmd_init(pmd);
72 return pmd;
73 }
74
75 #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
76
77 #endif
78
79 #ifndef __PAGETABLE_PUD_FOLDED
80
pud_alloc_one(struct mm_struct * mm,unsigned long address)81 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
82 {
83 pud_t *pud;
84 struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL & ~__GFP_HIGHMEM,
85 PUD_TABLE_ORDER);
86
87 if (!ptdesc)
88 return NULL;
89 pagetable_pud_ctor(ptdesc);
90 pud = ptdesc_address(ptdesc);
91
92 pud_init(pud);
93 return pud;
94 }
95
p4d_populate(struct mm_struct * mm,p4d_t * p4d,pud_t * pud)96 static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
97 {
98 set_p4d(p4d, __p4d((unsigned long)pud));
99 }
100
101 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
102
103 #endif /* __PAGETABLE_PUD_FOLDED */
104
105 extern void pagetable_init(void);
106
107 #endif /* _ASM_PGALLOC_H */
108