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pgalloc.h
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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 
13 static inline void
15 {
16  pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
17 }
18 #define pmd_pgtable(pmd) pmd_page(pmd)
19 
20 static inline void
21 pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
22 {
23  pmd_set(pmd, pte);
24 }
25 
26 static inline void
27 pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
28 {
29  pgd_set(pgd, pmd);
30 }
31 
32 extern pgd_t *pgd_alloc(struct mm_struct *mm);
33 
34 static inline void
35 pgd_free(struct mm_struct *mm, pgd_t *pgd)
36 {
37  free_page((unsigned long)pgd);
38 }
39 
40 static inline pmd_t *
41 pmd_alloc_one(struct mm_struct *mm, unsigned long address)
42 {
44  return ret;
45 }
46 
47 static inline void
48 pmd_free(struct mm_struct *mm, pmd_t *pmd)
49 {
50  free_page((unsigned long)pmd);
51 }
52 
53 static inline pte_t *
54 pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
55 {
57  return pte;
58 }
59 
60 static inline void
61 pte_free_kernel(struct mm_struct *mm, pte_t *pte)
62 {
63  free_page((unsigned long)pte);
64 }
65 
66 static inline pgtable_t
67 pte_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  pgtable_page_ctor(page);
76  return page;
77 }
78 
79 static inline void
80 pte_free(struct mm_struct *mm, pgtable_t page)
81 {
82  pgtable_page_dtor(page);
83  __free_page(page);
84 }
85 
86 #define check_pgt_cache() do { } while (0)
87 
88 #endif /* _ALPHA_PGALLOC_H */