1 #ifndef M68K_MCF_PGALLOC_H 2 #define M68K_MCF_PGALLOC_H 3 4 #include <asm/tlb.h> 5 #include <asm/tlbflush.h> 6 7 extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 8 { 9 free_page((unsigned long) pte); 10 } 11 12 extern const char bad_pmd_string[]; 13 14 extern inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, 15 unsigned long address) 16 { 17 unsigned long page = __get_free_page(GFP_DMA); 18 19 if (!page) 20 return NULL; 21 22 memset((void *)page, 0, PAGE_SIZE); 23 return (pte_t *) (page); 24 } 25 26 extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address) 27 { 28 return (pmd_t *) pgd; 29 } 30 31 #define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); }) 32 #define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); }) 33 34 #define pte_alloc_one_fast(mm, addr) pte_alloc_one(mm, addr) 35 36 #define pmd_populate(mm, pmd, page) (pmd_val(*pmd) = \ 37 (unsigned long)(page_address(page))) 38 39 #define pmd_populate_kernel(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte)) 40 41 #define pmd_pgtable(pmd) pmd_page(pmd) 42 43 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page, 44 unsigned long address) 45 { 46 __free_page(page); 47 } 48 49 #define __pmd_free_tlb(tlb, pmd, address) do { } while (0) 50 51 static inline struct page *pte_alloc_one(struct mm_struct *mm, 52 unsigned long address) 53 { 54 struct page *page = alloc_pages(GFP_DMA, 0); 55 pte_t *pte; 56 57 if (!page) 58 return NULL; 59 if (!pgtable_page_ctor(page)) { 60 __free_page(page); 61 return NULL; 62 } 63 64 pte = kmap(page); 65 if (pte) { 66 clear_page(pte); 67 __flush_page_to_ram(pte); 68 flush_tlb_kernel_page(pte); 69 nocache_page(pte); 70 } 71 kunmap(page); 72 73 return page; 74 } 75 76 extern inline void pte_free(struct mm_struct *mm, struct page *page) 77 { 78 __free_page(page); 79 } 80 81 /* 82 * In our implementation, each pgd entry contains 1 pmd that is never allocated 83 * or freed. pgd_present is always 1, so this should never be called. -NL 84 */ 85 #define pmd_free(mm, pmd) BUG() 86 87 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 88 { 89 free_page((unsigned long) pgd); 90 } 91 92 static inline pgd_t *pgd_alloc(struct mm_struct *mm) 93 { 94 pgd_t *new_pgd; 95 96 new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN); 97 if (!new_pgd) 98 return NULL; 99 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE); 100 memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT); 101 return new_pgd; 102 } 103 104 #define pgd_populate(mm, pmd, pte) BUG() 105 106 #endif /* M68K_MCF_PGALLOC_H */ 107