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(pte_t * pte)
26 free_page((unsigned long) pte);
29 static inline void pte_free(struct page *page)
34 static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *page)
36 tlb_remove_page(tlb, page);
39 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
40 unsigned long address)
42 unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT);
47 memset((void *)page, 0, PAGE_SIZE);
48 return (pte_t *) (page);
51 static inline struct page *pte_alloc_one(struct mm_struct *mm,
52 unsigned long address)
54 struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
64 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
66 pmd_val(*pmd) = __pa((unsigned long)pte);
69 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
71 pmd_val(*pmd) = __pa((unsigned long)page_address(page));
75 * allocating and freeing a pmd is trivial: the 1-entry pmd is
76 * inside the pgd, so has no extra memory associated with it.
78 #define pmd_free(x) do { } while (0)
79 #define __pmd_free_tlb(tlb, x) do { } while (0)
81 static inline void pgd_free(pgd_t * pgd)
83 free_page((unsigned long) pgd);
86 static inline pgd_t * pgd_alloc(struct mm_struct *mm)
90 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
91 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
92 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
96 #define pgd_populate(mm, pmd, pte) BUG()
98 #endif /* SUN3_PGALLOC_H */