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, pgtable_t page)
31 pgtable_page_dtor(page);
35 #define __pte_free_tlb(tlb,pte) \
37 pgtable_page_dtor(pte); \
38 tlb_remove_page((tlb), pte); \
41 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
42 unsigned long address)
44 unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT);
49 memset((void *)page, 0, PAGE_SIZE);
50 return (pte_t *) (page);
53 static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
54 unsigned long address)
56 struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
62 pgtable_page_ctor(page);
67 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
69 pmd_val(*pmd) = __pa((unsigned long)pte);
72 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
74 pmd_val(*pmd) = __pa((unsigned long)page_address(page));
76 #define pmd_pgtable(pmd) pmd_page(pmd)
79 * allocating and freeing a pmd is trivial: the 1-entry pmd is
80 * inside the pgd, so has no extra memory associated with it.
82 #define pmd_free(mm, x) do { } while (0)
83 #define __pmd_free_tlb(tlb, x) do { } while (0)
85 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
87 free_page((unsigned long) pgd);
90 static inline pgd_t * pgd_alloc(struct mm_struct *mm)
94 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
95 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
96 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
100 #define pgd_populate(mm, pmd, pte) BUG()
102 #endif /* SUN3_PGALLOC_H */