2 * reorganization around 2.3.39, routines moved from sun3_pgtable.h
5 * 02/27/2002 -- Modified to support "highpte" implementation in 2.5.5 (Sam)
7 * moved 1/26/2000 Sam Creasey
10 #ifndef _SUN3_PGALLOC_H
11 #define _SUN3_PGALLOC_H
15 extern const char bad_pmd_string[];
17 #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); })
20 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
22 free_page((unsigned long) pte);
25 static inline void pte_free(struct mm_struct *mm, pgtable_t page)
27 pgtable_page_dtor(page);
31 #define __pte_free_tlb(tlb,pte,addr) \
33 pgtable_page_dtor(pte); \
34 tlb_remove_page((tlb), pte); \
37 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
38 unsigned long address)
40 unsigned long page = __get_free_page(GFP_KERNEL);
45 memset((void *)page, 0, PAGE_SIZE);
46 return (pte_t *) (page);
49 static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
50 unsigned long address)
52 struct page *page = alloc_pages(GFP_KERNEL, 0);
58 if (!pgtable_page_ctor(page)) {
66 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
68 pmd_val(*pmd) = __pa((unsigned long)pte);
71 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
73 pmd_val(*pmd) = __pa((unsigned long)page_address(page));
75 #define pmd_pgtable(pmd) pmd_page(pmd)
78 * allocating and freeing a pmd is trivial: the 1-entry pmd is
79 * inside the pgd, so has no extra memory associated with it.
81 #define pmd_free(mm, x) do { } while (0)
82 #define __pmd_free_tlb(tlb, x, addr) do { } while (0)
84 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
86 free_page((unsigned long) pgd);
89 static inline pgd_t * pgd_alloc(struct mm_struct *mm)
93 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
94 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
95 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
99 #define pgd_populate(mm, pmd, pte) BUG()
101 #endif /* SUN3_PGALLOC_H */