Linux kernel mirror (for testing)
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linux
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
18static 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
24static 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 */
34extern void pmd_init(unsigned long page, unsigned long pagetable);
35
36#ifndef __PAGETABLE_PMD_FOLDED
37
38static 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 */
47extern void pgd_init(unsigned long page);
48extern pgd_t *pgd_alloc(struct mm_struct *mm);
49
50static 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) \
56do { \
57 pgtable_pte_page_dtor(pte); \
58 tlb_remove_page((tlb), pte); \
59} while (0)
60
61#ifndef __PAGETABLE_PMD_FOLDED
62
63static 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
73static 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
84static 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
94static inline void pud_free(struct mm_struct *mm, pud_t *pud)
95{
96 free_pages((unsigned long)pud, PUD_ORDER);
97}
98
99static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
100{
101 set_p4d(p4d, __p4d((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
108extern void pagetable_init(void);
109
110#endif /* _ASM_PGALLOC_H */