Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 | #ifndef _M68K_PAGE_H #define _M68K_PAGE_H #include <linux/config.h> /* PAGE_SHIFT determines the page size */ #ifndef CONFIG_SUN3 #define PAGE_SHIFT (12) #define PAGE_SIZE (4096) #else #define PAGE_SHIFT (13) #define PAGE_SIZE (8192) #endif #define PAGE_MASK (~(PAGE_SIZE-1)) #ifdef __KERNEL__ #include <asm/setup.h> #if PAGE_SHIFT < 13 #define THREAD_SIZE (8192) #else #define THREAD_SIZE PAGE_SIZE #endif #ifndef __ASSEMBLY__ #define get_user_page(vaddr) __get_free_page(GFP_KERNEL) #define free_user_page(page, addr) free_page(addr) /* * We don't need to check for alignment etc. */ #ifdef CPU_M68040_OR_M68060_ONLY static inline void copy_page(void *to, void *from) { unsigned long tmp; __asm__ __volatile__("1:\t" ".chip 68040\n\t" "move16 %1@+,%0@+\n\t" "move16 %1@+,%0@+\n\t" ".chip 68k\n\t" "dbra %2,1b\n\t" : "=a" (to), "=a" (from), "=d" (tmp) : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1) ); } static inline void clear_page(void *page) { unsigned long data, tmp; void *sp = page; data = 0; *((unsigned long *)(page))++ = 0; *((unsigned long *)(page))++ = 0; *((unsigned long *)(page))++ = 0; *((unsigned long *)(page))++ = 0; __asm__ __volatile__("1:\t" ".chip 68040\n\t" "move16 %2@+,%0@+\n\t" ".chip 68k\n\t" "subqw #8,%2\n\t" "subqw #8,%2\n\t" "dbra %1,1b\n\t" : "=a" (page), "=d" (tmp) : "a" (sp), "0" (page), "1" ((PAGE_SIZE - 16) / 16 - 1)); } #else #define clear_page(page) memset((page), 0, PAGE_SIZE) #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) #endif #define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) /* * These are used to make use of C type-checking.. */ typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long pmd[16]; } pmd_t; typedef struct { unsigned long pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define pte_val(x) ((x).pte) #define pmd_val(x) ((&x)->pmd[0]) #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) /* Pure 2^n version of get_order */ extern __inline__ int get_order(unsigned long size) { int order; size = (size-1) >> (PAGE_SHIFT-1); order = -1; do { size >>= 1; order++; } while (size); return order; } #endif /* !__ASSEMBLY__ */ #include <asm/page_offset.h> #define PAGE_OFFSET (PAGE_OFFSET_RAW) #ifndef __ASSEMBLY__ #ifndef CONFIG_SUN3 #ifdef CONFIG_SINGLE_MEMORY_CHUNK extern unsigned long m68k_memoffset; #define __pa(vaddr) ((unsigned long)(vaddr)+m68k_memoffset) #define __va(paddr) ((void *)((unsigned long)(paddr)-m68k_memoffset)) #else #define __pa(vaddr) virt_to_phys((void *)vaddr) #define __va(paddr) phys_to_virt((unsigned long)paddr) #endif #else /* !CONFIG_SUN3 */ /* This #define is a horrible hack to suppress lots of warnings. --m */ #define __pa(x) ___pa((unsigned long)x) static inline unsigned long ___pa(unsigned long x) { if(x == 0) return 0; if(x > PAGE_OFFSET) return (x-PAGE_OFFSET); else return (x+0x2000000); } static inline void *__va(unsigned long x) { if(x == 0) return (void *)0; if(x < 0x2000000) return (void *)(x+PAGE_OFFSET); else return (void *)(x-0x2000000); } #endif /* CONFIG_SUN3 */ /* * NOTE: virtual isn't really correct, actually it should be the offset into the * memory node, but we have no highmem, so that works for now. * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots * of the shifts unneccessary. */ #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) #define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr)-PAGE_OFFSET) >> PAGE_SHIFT)) #define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) #define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn)) #define page_to_pfn(page) virt_to_pfn(page_to_virt(page)) #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn)) #ifdef CONFIG_DEBUG_BUGVERBOSE #ifndef CONFIG_SUN3 #define BUG() do { \ printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ asm volatile("illegal"); \ } while (0) #else #define BUG() do { \ printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ panic("BUG!"); \ } while (0) #endif #else #define BUG() do { \ asm volatile("illegal"); \ } while (0) #endif #define PAGE_BUG(page) do { \ BUG(); \ } while (0) #endif /* __ASSEMBLY__ */ #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #endif /* __KERNEL__ */ #endif /* _M68K_PAGE_H */ |