1 #ifndef _METAG_PGALLOC_H
2 #define _METAG_PGALLOC_H
3
4 #include <linux/threads.h>
5 #include <linux/mm.h>
6
7 #define pmd_populate_kernel(mm, pmd, pte) \
8 set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
9
10 #define pmd_populate(mm, pmd, pte) \
11 set_pmd(pmd, __pmd(_PAGE_TABLE | page_to_phys(pte)))
12
13 #define pmd_pgtable(pmd) pmd_page(pmd)
14
15 /*
16 * Allocate and free page tables.
17 */
18 #ifdef CONFIG_METAG_META21_MMU
pgd_ctor(pgd_t * pgd)19 static inline void pgd_ctor(pgd_t *pgd)
20 {
21 memcpy(pgd + USER_PTRS_PER_PGD,
22 swapper_pg_dir + USER_PTRS_PER_PGD,
23 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
24 }
25 #else
26 #define pgd_ctor(x) do { } while (0)
27 #endif
28
pgd_alloc(struct mm_struct * mm)29 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
30 {
31 pgd_t *pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
32 if (pgd)
33 pgd_ctor(pgd);
34 return pgd;
35 }
36
pgd_free(struct mm_struct * mm,pgd_t * pgd)37 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
38 {
39 free_page((unsigned long)pgd);
40 }
41
pte_alloc_one_kernel(struct mm_struct * mm,unsigned long address)42 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
43 unsigned long address)
44 {
45 pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
46 return pte;
47 }
48
pte_alloc_one(struct mm_struct * mm,unsigned long address)49 static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
50 unsigned long address)
51 {
52 struct page *pte;
53 pte = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
54 if (!pte)
55 return NULL;
56 if (!pgtable_page_ctor(pte)) {
57 __free_page(pte);
58 return NULL;
59 }
60 return pte;
61 }
62
pte_free_kernel(struct mm_struct * mm,pte_t * pte)63 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
64 {
65 free_page((unsigned long)pte);
66 }
67
pte_free(struct mm_struct * mm,pgtable_t pte)68 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
69 {
70 pgtable_page_dtor(pte);
71 __free_page(pte);
72 }
73
74 #define __pte_free_tlb(tlb, pte, addr) \
75 do { \
76 pgtable_page_dtor(pte); \
77 tlb_remove_page((tlb), (pte)); \
78 } while (0)
79
80 #define check_pgt_cache() do { } while (0)
81
82 #endif
83