Linux kernel mirror (for testing)
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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
20static 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
26static 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 */
35extern void pmd_init(unsigned long page, unsigned long pagetable);
36
37#ifndef __PAGETABLE_PMD_FOLDED
38
39static 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 / pmd table with invalid pointers.
47 */
48extern void pgd_init(unsigned long page);
49extern pgd_t *pgd_alloc(struct mm_struct *mm);
50
51#define __pte_free_tlb(tlb,pte,address) \
52do { \
53 pgtable_pte_page_dtor(pte); \
54 tlb_remove_page((tlb), pte); \
55} while (0)
56
57#ifndef __PAGETABLE_PMD_FOLDED
58
59static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
60{
61 pmd_t *pmd;
62 struct page *pg;
63
64 pg = alloc_pages(GFP_KERNEL_ACCOUNT, PMD_ORDER);
65 if (!pg)
66 return NULL;
67
68 if (!pgtable_pmd_page_ctor(pg)) {
69 __free_pages(pg, PMD_ORDER);
70 return NULL;
71 }
72
73 pmd = (pmd_t *)page_address(pg);
74 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
75 return pmd;
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 p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
95{
96 set_p4d(p4d, __p4d((unsigned long)pud));
97}
98
99#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
100
101#endif /* __PAGETABLE_PUD_FOLDED */
102
103extern void pagetable_init(void);
104
105#endif /* _ASM_PGALLOC_H */