1 #ifndef M68K_MCF_PGALLOC_H
2 #define M68K_MCF_PGALLOC_H
3
4 #include <asm/tlb.h>
5 #include <asm/tlbflush.h>
6
pte_free_kernel(struct mm_struct * mm,pte_t * pte)7 extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
8 {
9 free_page((unsigned long) pte);
10 }
11
12 extern const char bad_pmd_string[];
13
pte_alloc_one_kernel(struct mm_struct * mm,unsigned long address)14 extern inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
15 unsigned long address)
16 {
17 unsigned long page = __get_free_page(GFP_DMA|__GFP_REPEAT);
18
19 if (!page)
20 return NULL;
21
22 memset((void *)page, 0, PAGE_SIZE);
23 return (pte_t *) (page);
24 }
25
pmd_alloc_kernel(pgd_t * pgd,unsigned long address)26 extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
27 {
28 return (pmd_t *) pgd;
29 }
30
31 #define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); })
32 #define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); })
33
34 #define pte_alloc_one_fast(mm, addr) pte_alloc_one(mm, addr)
35
36 #define pmd_populate(mm, pmd, page) (pmd_val(*pmd) = \
37 (unsigned long)(page_address(page)))
38
39 #define pmd_populate_kernel(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
40
41 #define pmd_pgtable(pmd) pmd_page(pmd)
42
__pte_free_tlb(struct mmu_gather * tlb,pgtable_t page,unsigned long address)43 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
44 unsigned long address)
45 {
46 __free_page(page);
47 }
48
49 #define __pmd_free_tlb(tlb, pmd, address) do { } while (0)
50
pte_alloc_one(struct mm_struct * mm,unsigned long address)51 static inline struct page *pte_alloc_one(struct mm_struct *mm,
52 unsigned long address)
53 {
54 struct page *page = alloc_pages(GFP_DMA|__GFP_REPEAT, 0);
55 pte_t *pte;
56
57 if (!page)
58 return NULL;
59 if (!pgtable_page_ctor(page)) {
60 __free_page(page);
61 return NULL;
62 }
63
64 pte = kmap(page);
65 if (pte) {
66 clear_page(pte);
67 __flush_page_to_ram(pte);
68 flush_tlb_kernel_page(pte);
69 nocache_page(pte);
70 }
71 kunmap(page);
72
73 return page;
74 }
75
pte_free(struct mm_struct * mm,struct page * page)76 extern inline void pte_free(struct mm_struct *mm, struct page *page)
77 {
78 __free_page(page);
79 }
80
81 /*
82 * In our implementation, each pgd entry contains 1 pmd that is never allocated
83 * or freed. pgd_present is always 1, so this should never be called. -NL
84 */
85 #define pmd_free(mm, pmd) BUG()
86
pgd_free(struct mm_struct * mm,pgd_t * pgd)87 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
88 {
89 free_page((unsigned long) pgd);
90 }
91
pgd_alloc(struct mm_struct * mm)92 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
93 {
94 pgd_t *new_pgd;
95
96 new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN);
97 if (!new_pgd)
98 return NULL;
99 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
100 memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
101 return new_pgd;
102 }
103
104 #define pgd_populate(mm, pmd, pte) BUG()
105
106 #endif /* M68K_MCF_PGALLOC_H */
107