projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 5c01b46b AB |
1 | #ifndef __ASM_GENERIC_PAGE_H |
| 2 | #define __ASM_GENERIC_PAGE_H | |
| 3 | /* | |
| 4 | * Generic page.h implementation, for NOMMU architectures. | |
| 5 | * This provides the dummy definitions for the memory management. | |
| 6 | */ | |
| 7 | ||
| 8 | #ifdef CONFIG_MMU | |
| 9 | #error need to prove a real asm/page.h | |
| 10 | #endif | |
| 11 | ||
| 12 | ||
| 13 | /* PAGE_SHIFT determines the page size */ | |
| 14 | ||
| 15 | #define PAGE_SHIFT 12 | |
| 16 | #ifdef __ASSEMBLY__ | |
| 17 | #define PAGE_SIZE (1 << PAGE_SHIFT) | |
| 18 | #else | |
| 19 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
| 20 | #endif | |
| 21 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
| 22 | ||
| 23 | #include <asm/setup.h> | |
| 24 | ||
| 25 | #ifndef __ASSEMBLY__ | |
| 26 | ||
| 27 | #define get_user_page(vaddr) __get_free_page(GFP_KERNEL) | |
| 28 | #define free_user_page(page, addr) free_page(addr) | |
| 29 | ||
| 30 | #define clear_page(page) memset((page), 0, PAGE_SIZE) | |
| 31 | #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) | |
| 32 | ||
| 33 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
| 34 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
| 35 | ||
| 36 | /* | |
| 37 | * These are used to make use of C type-checking.. | |
| 38 | */ | |
| 39 | typedef struct { | |
| 40 | unsigned long pte; | |
| 41 | } pte_t; | |
| 42 | typedef struct { | |
| 43 | unsigned long pmd[16]; | |
| 44 | } pmd_t; | |
| 45 | typedef struct { | |
| 46 | unsigned long pgd; | |
| 47 | } pgd_t; | |
| 48 | typedef struct { | |
| 49 | unsigned long pgprot; | |
| 50 | } pgprot_t; | |
| 51 | typedef struct page *pgtable_t; | |
| 52 | ||
| 53 | #define pte_val(x) ((x).pte) | |
| 54 | #define pmd_val(x) ((&x)->pmd[0]) | |
| 55 | #define pgd_val(x) ((x).pgd) | |
| 56 | #define pgprot_val(x) ((x).pgprot) | |
| 57 | ||
| 58 | #define __pte(x) ((pte_t) { (x) } ) | |
| 59 | #define __pmd(x) ((pmd_t) { (x) } ) | |
| 60 | #define __pgd(x) ((pgd_t) { (x) } ) | |
| 61 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
| 62 | ||
| 63 | extern unsigned long memory_start; | |
| 64 | extern unsigned long memory_end; | |
| 65 | ||
| 66 | #endif /* !__ASSEMBLY__ */ | |
| 67 | ||
| 68 | #ifdef CONFIG_KERNEL_RAM_BASE_ADDRESS | |
| 69 | #define PAGE_OFFSET (CONFIG_KERNEL_RAM_BASE_ADDRESS) | |
| 70 | #else | |
| 71 | #define PAGE_OFFSET (0) | |
| 72 | #endif | |
| 73 | ||
| 74 | #ifndef __ASSEMBLY__ | |
| 75 | ||
| 76 | #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) | |
| 77 | #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) | |
| 78 | ||
| 79 | #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) | |
| 80 | #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) | |
| 81 | ||
| 82 | #define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) | |
| 83 | #define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) | |
| 84 | ||
| 85 | #ifndef page_to_phys | |
| 86 | #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT) | |
| 87 | #endif | |
| 88 | ||
| 89 | #define pfn_valid(pfn) ((pfn) < max_mapnr) | |
| 90 | ||
| 91 | #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ | |
| 92 | ((void *)(kaddr) < (void *)memory_end)) | |
| 93 | ||
| 94 | #endif /* __ASSEMBLY__ */ | |
| 95 | ||
| 96 | #include <asm-generic/memory_model.h> | |
| 97 | #include <asm-generic/getorder.h> | |
| 98 | ||
| 99 | #endif /* __ASM_GENERIC_PAGE_H */ |