Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1#ifndef _ALPHA_PGALLOC_H
2#define _ALPHA_PGALLOC_H
3
4#include <linux/mm.h>
5#include <linux/mmzone.h>
6
7/*
8 * Allocate and free page tables. The xxx_kernel() versions are
9 * used to allocate a kernel page table - this turns on ASN bits
10 * if any.
11 */
12
13static inline void
14pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
15{
16 pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
17}
18#define pmd_pgtable(pmd) pmd_page(pmd)
19
20static inline void
21pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
22{
23 pmd_set(pmd, pte);
24}
25
26static inline void
27pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
28{
29 pgd_set(pgd, pmd);
30}
31
32extern pgd_t *pgd_alloc(struct mm_struct *mm);
33
34static inline void
35pgd_free(struct mm_struct *mm, pgd_t *pgd)
36{
37 free_page((unsigned long)pgd);
38}
39
40static inline pmd_t *
41pmd_alloc_one(struct mm_struct *mm, unsigned long address)
42{
43 pmd_t *ret = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
44 return ret;
45}
46
47static inline void
48pmd_free(struct mm_struct *mm, pmd_t *pmd)
49{
50 free_page((unsigned long)pmd);
51}
52
53extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
54
55static inline void
56pte_free_kernel(struct mm_struct *mm, pte_t *pte)
57{
58 free_page((unsigned long)pte);
59}
60
61static inline pgtable_t
62pte_alloc_one(struct mm_struct *mm, unsigned long address)
63{
64 pte_t *pte = pte_alloc_one_kernel(mm, address);
65 struct page *page;
66
67 if (!pte)
68 return NULL;
69 page = virt_to_page(pte);
70 pgtable_page_ctor(page);
71 return page;
72}
73
74static inline void
75pte_free(struct mm_struct *mm, pgtable_t page)
76{
77 pgtable_page_dtor(page);
78 __free_page(page);
79}
80
81#define check_pgt_cache() do { } while (0)
82
83#endif /* _ALPHA_PGALLOC_H */