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 /* FIXME - when we get this compiling */
16 /* erm, now that it's compiling, what do we do with it? */
17 #define _KERNPG_TABLE 0
19 extern const char bad_pmd_string[];
21 #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); })
24 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
26 free_page((unsigned long) pte);
29 static inline void pte_free(struct mm_struct *mm, struct page *page)
34 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
36 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
37 unsigned long address)
39 unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT);
44 memset((void *)page, 0, PAGE_SIZE);
45 return (pte_t *) (page);
48 static inline struct page *pte_alloc_one(struct mm_struct *mm,
49 unsigned long address)
51 struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
61 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
63 pmd_val(*pmd) = __pa((unsigned long)pte);
66 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
68 pmd_val(*pmd) = __pa((unsigned long)page_address(page));
72 * allocating and freeing a pmd is trivial: the 1-entry pmd is
73 * inside the pgd, so has no extra memory associated with it.
75 #define pmd_free(mm, x) do { } while (0)
76 #define __pmd_free_tlb(tlb, x) do { } while (0)
78 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
80 free_page((unsigned long) pgd);
83 static inline pgd_t * pgd_alloc(struct mm_struct *mm)
87 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
88 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
89 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
93 #define pgd_populate(mm, pmd, pte) BUG()
95 #endif /* SUN3_PGALLOC_H */