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 /* FIXME - when we get this compiling */ 16 /* erm, now that it's compiling, what do we do with it? */ 17 #define _KERNPG_TABLE 0 18 19 extern const char bad_pmd_string[]; 20 21 #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) 22 23 24 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 25 { 26 free_page((unsigned long) pte); 27 } 28 29 static inline void pte_free(struct mm_struct *mm, pgtable_t page) 30 { 31 pgtable_page_dtor(page); 32 __free_page(page); 33 } 34 35 #define __pte_free_tlb(tlb,pte,addr) \ 36 do { \ 37 pgtable_page_dtor(pte); \ 38 tlb_remove_page((tlb), pte); \ 39 } while (0) 40 41 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, 42 unsigned long address) 43 { 44 unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT); 45 46 if (!page) 47 return NULL; 48 49 memset((void *)page, 0, PAGE_SIZE); 50 return (pte_t *) (page); 51 } 52 53 static inline pgtable_t pte_alloc_one(struct mm_struct *mm, 54 unsigned long address) 55 { 56 struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0); 57 58 if (page == NULL) 59 return NULL; 60 61 clear_highpage(page); 62 pgtable_page_ctor(page); 63 return page; 64 65 } 66 67 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) 68 { 69 pmd_val(*pmd) = __pa((unsigned long)pte); 70 } 71 72 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page) 73 { 74 pmd_val(*pmd) = __pa((unsigned long)page_address(page)); 75 } 76 #define pmd_pgtable(pmd) pmd_page(pmd) 77 78 /* 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. 81 */ 82 #define pmd_free(mm, x) do { } while (0) 83 #define __pmd_free_tlb(tlb, x, addr) do { } while (0) 84 85 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 86 { 87 free_page((unsigned long) pgd); 88 } 89 90 static inline pgd_t * pgd_alloc(struct mm_struct *mm) 91 { 92 pgd_t *new_pgd; 93 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)); 97 return new_pgd; 98 } 99 100 #define pgd_populate(mm, pmd, pte) BUG() 101 102 #endif /* SUN3_PGALLOC_H */ 103