1 #ifndef _BLACKFIN_PAGE_H 2 #define _BLACKFIN_PAGE_H 3 4 /* PAGE_SHIFT determines the page size */ 5 6 #define PAGE_SHIFT 12 7 #ifdef __ASSEMBLY__ 8 #define PAGE_SIZE (1 << PAGE_SHIFT) 9 #else 10 #define PAGE_SIZE (1UL << PAGE_SHIFT) 11 #endif 12 #define PAGE_MASK (~(PAGE_SIZE-1)) 13 14 #include <asm/setup.h> 15 16 #ifndef __ASSEMBLY__ 17 18 #define get_user_page(vaddr) __get_free_page(GFP_KERNEL) 19 #define free_user_page(page, addr) free_page(addr) 20 21 #define clear_page(page) memset((page), 0, PAGE_SIZE) 22 #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) 23 24 #define clear_user_page(page, vaddr,pg) clear_page(page) 25 #define copy_user_page(to, from, vaddr,pg) copy_page(to, from) 26 27 /* 28 * These are used to make use of C type-checking.. 29 */ 30 typedef struct { 31 unsigned long pte; 32 } pte_t; 33 typedef struct { 34 unsigned long pmd[16]; 35 } pmd_t; 36 typedef struct { 37 unsigned long pgd; 38 } pgd_t; 39 typedef struct { 40 unsigned long pgprot; 41 } pgprot_t; 42 typedef struct page *pgtable_t; 43 44 #define pte_val(x) ((x).pte) 45 #define pmd_val(x) ((&x)->pmd[0]) 46 #define pgd_val(x) ((x).pgd) 47 #define pgprot_val(x) ((x).pgprot) 48 49 #define __pte(x) ((pte_t) { (x) } ) 50 #define __pmd(x) ((pmd_t) { (x) } ) 51 #define __pgd(x) ((pgd_t) { (x) } ) 52 #define __pgprot(x) ((pgprot_t) { (x) } ) 53 54 extern unsigned long memory_start; 55 extern unsigned long memory_end; 56 57 #endif /* !__ASSEMBLY__ */ 58 59 #include <asm/page_offset.h> 60 #include <asm/io.h> 61 62 #define PAGE_OFFSET (PAGE_OFFSET_RAW) 63 64 #ifndef __ASSEMBLY__ 65 66 #define __pa(vaddr) virt_to_phys((void *)(vaddr)) 67 #define __va(paddr) phys_to_virt((unsigned long)(paddr)) 68 69 #define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT) 70 71 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 72 #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) 73 #define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) 74 #define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) 75 #define VALID_PAGE(page) ((page - mem_map) < max_mapnr) 76 77 #define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn)) 78 #define page_to_pfn(page) virt_to_pfn(page_to_virt(page)) 79 #define pfn_valid(pfn) ((pfn) < max_mapnr) 80 81 #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ 82 ((void *)(kaddr) < (void *)memory_end)) 83 84 #include <asm-generic/page.h> 85 86 #endif /* __ASSEMBLY__ */ 87 88 #endif /* _BLACKFIN_PAGE_H */ 89