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 #define pmd_pgtable(pmd) pmd_page(pmd)
32
33 /*
34 * Initialize a new pmd table with invalid pointers.
35 */
36 extern void pmd_init(unsigned long page, unsigned long pagetable);
37
38 #ifndef __PAGETABLE_PMD_FOLDED
39
pud_populate(struct mm_struct * mm,pud_t * pud,pmd_t * pmd)40 static 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 / pmd table with invalid pointers.
48 */
49 extern void pgd_init(unsigned long page);
50 extern pgd_t *pgd_alloc(struct mm_struct *mm);
51
52 #define __pte_free_tlb(tlb,pte,address) \
53 do { \
54 pgtable_pte_page_dtor(pte); \
55 tlb_remove_page((tlb), pte); \
56 } while (0)
57
58 #ifndef __PAGETABLE_PMD_FOLDED
59
pmd_alloc_one(struct mm_struct * mm,unsigned long address)60 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
61 {
62 pmd_t *pmd;
63
64 pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
65 if (pmd)
66 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
67 return pmd;
68 }
69
70 #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
71
72 #endif
73
74 #ifndef __PAGETABLE_PUD_FOLDED
75
pud_alloc_one(struct mm_struct * mm,unsigned long address)76 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
77 {
78 pud_t *pud;
79
80 pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER);
81 if (pud)
82 pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table);
83 return pud;
84 }
85
p4d_populate(struct mm_struct * mm,p4d_t * p4d,pud_t * pud)86 static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
87 {
88 set_p4d(p4d, __p4d((unsigned long)pud));
89 }
90
91 #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
92
93 #endif /* __PAGETABLE_PUD_FOLDED */
94
95 extern void pagetable_init(void);
96
97 #endif /* _ASM_PGALLOC_H */
98