1 /* sun3_pgalloc.h -- 2 * reorganization around 2.3.39, routines moved from sun3_pgtable.h 3 * 4 * 5 * 02/27/2002 -- Modified to support "highpte" implementation in 2.5.5 (Sam) 6 * 7 * moved 1/26/2000 Sam Creasey 8 */ 9 10 #ifndef _SUN3_PGALLOC_H 11 #define _SUN3_PGALLOC_H 12 13 #include <asm/tlb.h> 14 15 extern const char bad_pmd_string[]; 16 17 #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) 18 19 20 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 21 { 22 free_page((unsigned long) pte); 23 } 24 25 static inline void pte_free(struct mm_struct *mm, pgtable_t page) 26 { 27 pgtable_page_dtor(page); 28 __free_page(page); 29 } 30 31 #define __pte_free_tlb(tlb,pte,addr) \ 32 do { \ 33 pgtable_page_dtor(pte); \ 34 tlb_remove_page((tlb), pte); \ 35 } while (0) 36 37 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, 38 unsigned long address) 39 { 40 unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT); 41 42 if (!page) 43 return NULL; 44 45 memset((void *)page, 0, PAGE_SIZE); 46 return (pte_t *) (page); 47 } 48 49 static inline pgtable_t pte_alloc_one(struct mm_struct *mm, 50 unsigned long address) 51 { 52 struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0); 53 54 if (page == NULL) 55 return NULL; 56 57 clear_highpage(page); 58 if (!pgtable_page_ctor(page)) { 59 __free_page(page); 60 return NULL; 61 } 62 return page; 63 64 } 65 66 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) 67 { 68 pmd_val(*pmd) = __pa((unsigned long)pte); 69 } 70 71 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page) 72 { 73 pmd_val(*pmd) = __pa((unsigned long)page_address(page)); 74 } 75 #define pmd_pgtable(pmd) pmd_page(pmd) 76 77 /* 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. 80 */ 81 #define pmd_free(mm, x) do { } while (0) 82 #define __pmd_free_tlb(tlb, x, addr) do { } while (0) 83 84 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 85 { 86 free_page((unsigned long) pgd); 87 } 88 89 static inline pgd_t * pgd_alloc(struct mm_struct *mm) 90 { 91 pgd_t *new_pgd; 92 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)); 96 return new_pgd; 97 } 98 99 #define pgd_populate(mm, pmd, pte) BUG() 100 101 #endif /* SUN3_PGALLOC_H */ 102