Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ALPHA_PGALLOC_H
3#define _ALPHA_PGALLOC_H
4
5#include <linux/mm.h>
6#include <linux/mmzone.h>
7
8/*
9 * Allocate and free page tables. The xxx_kernel() versions are
10 * used to allocate a kernel page table - this turns on ASN bits
11 * if any.
12 */
13
14static inline void
15pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
16{
17 pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
18}
19#define pmd_pgtable(pmd) pmd_page(pmd)
20
21static inline void
22pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
23{
24 pmd_set(pmd, pte);
25}
26
27static inline void
28pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
29{
30 pgd_set(pgd, pmd);
31}
32
33extern pgd_t *pgd_alloc(struct mm_struct *mm);
34
35static inline void
36pgd_free(struct mm_struct *mm, pgd_t *pgd)
37{
38 free_page((unsigned long)pgd);
39}
40
41static inline pmd_t *
42pmd_alloc_one(struct mm_struct *mm, unsigned long address)
43{
44 pmd_t *ret = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
45 return ret;
46}
47
48static inline void
49pmd_free(struct mm_struct *mm, pmd_t *pmd)
50{
51 free_page((unsigned long)pmd);
52}
53
54static inline pte_t *
55pte_alloc_one_kernel(struct mm_struct *mm)
56{
57 pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
58 return pte;
59}
60
61static inline void
62pte_free_kernel(struct mm_struct *mm, pte_t *pte)
63{
64 free_page((unsigned long)pte);
65}
66
67static inline pgtable_t
68pte_alloc_one(struct mm_struct *mm)
69{
70 pte_t *pte = pte_alloc_one_kernel(mm);
71 struct page *page;
72
73 if (!pte)
74 return NULL;
75 page = virt_to_page(pte);
76 if (!pgtable_page_ctor(page)) {
77 __free_page(page);
78 return NULL;
79 }
80 return page;
81}
82
83static inline void
84pte_free(struct mm_struct *mm, pgtable_t page)
85{
86 pgtable_page_dtor(page);
87 __free_page(page);
88}
89
90#define check_pgt_cache() do { } while (0)
91
92#endif /* _ALPHA_PGALLOC_H */