Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame^] | 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 | #define PAGE_SIZE (1UL << PAGE_SHIFT) |
| 8 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
| 9 | |
| 10 | #ifdef __KERNEL__ |
| 11 | |
| 12 | #include <asm/setup.h> |
| 13 | |
| 14 | #ifndef __ASSEMBLY__ |
| 15 | |
| 16 | #define get_user_page(vaddr) __get_free_page(GFP_KERNEL) |
| 17 | #define free_user_page(page, addr) free_page(addr) |
| 18 | |
| 19 | #define clear_page(page) memset((page), 0, PAGE_SIZE) |
| 20 | #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) |
| 21 | |
| 22 | #define clear_user_page(page, vaddr,pg) clear_page(page) |
| 23 | #define copy_user_page(to, from, vaddr,pg) copy_page(to, from) |
| 24 | |
| 25 | /* |
| 26 | * These are used to make use of C type-checking.. |
| 27 | */ |
| 28 | typedef struct { |
| 29 | unsigned long pte; |
| 30 | } pte_t; |
| 31 | typedef struct { |
| 32 | unsigned long pmd[16]; |
| 33 | } pmd_t; |
| 34 | typedef struct { |
| 35 | unsigned long pgd; |
| 36 | } pgd_t; |
| 37 | typedef struct { |
| 38 | unsigned long pgprot; |
| 39 | } pgprot_t; |
| 40 | |
| 41 | #define pte_val(x) ((x).pte) |
| 42 | #define pmd_val(x) ((&x)->pmd[0]) |
| 43 | #define pgd_val(x) ((x).pgd) |
| 44 | #define pgprot_val(x) ((x).pgprot) |
| 45 | |
| 46 | #define __pte(x) ((pte_t) { (x) } ) |
| 47 | #define __pmd(x) ((pmd_t) { (x) } ) |
| 48 | #define __pgd(x) ((pgd_t) { (x) } ) |
| 49 | #define __pgprot(x) ((pgprot_t) { (x) } ) |
| 50 | |
| 51 | /* to align the pointer to the (next) page boundary */ |
| 52 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) |
| 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 | #endif /* __KERNEL__ */ |
| 88 | |
| 89 | #endif /* _BLACKFIN_PAGE_H */ |