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
53static inline pte_t *
54pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
55{
56	pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
57	return pte;
58}
59
60static inline void
61pte_free_kernel(struct mm_struct *mm, pte_t *pte)
62{
63	free_page((unsigned long)pte);
64}
65
66static inline pgtable_t
67pte_alloc_one(struct mm_struct *mm, unsigned long address)
68{
69	pte_t *pte = pte_alloc_one_kernel(mm, address);
70	struct page *page;
71
72	if (!pte)
73		return NULL;
74	page = virt_to_page(pte);
75	if (!pgtable_page_ctor(page)) {
76		__free_page(page);
77		return NULL;
78	}
79	return page;
80}
81
82static inline void
83pte_free(struct mm_struct *mm, pgtable_t page)
84{
85	pgtable_page_dtor(page);
86	__free_page(page);
87}
88
89#define check_pgt_cache()	do { } while (0)
90
91#endif /* _ALPHA_PGALLOC_H */
92