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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 | #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 KTHREAD_SIZE (8192) #else #define KTHREAD_SIZE PAGE_SIZE #endif #ifndef __ASSEMBLY__ #define STRICT_MM_TYPECHECKS #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(unsigned long to, unsigned long 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(unsigned long page) { unsigned long data, sp, tmp; 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((void *)(page), 0, PAGE_SIZE) #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) #endif #ifdef STRICT_MM_TYPECHECKS /* * 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) } ) #else /* * .. while these make it easier on the compiler */ typedef unsigned long pte_t; typedef struct { unsigned long pmd[16]; } pmd_t; typedef unsigned long pgd_t; typedef unsigned long pgprot_t; #define pte_val(x) (x) #define pmd_val(x) ((&x)->pmd[0]) #define pgd_val(x) (x) #define pgprot_val(x) (x) #define __pte(x) (x) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgd(x) (x) #define __pgprot(x) (x) #endif /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) /* This handles the memory map.. */ #ifndef CONFIG_SUN3 #define PAGE_OFFSET 0 #else #define PAGE_OFFSET 0x0E000000 #endif #ifndef CONFIG_SUN3 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) /* * A hacky workaround for the problems with mmap() of frame buffer * memory in the lower 16MB physical memoryspace. * * This is a short term solution, we will have to deal properly * with this in 2.3.x. */ extern inline void *__va(unsigned long physaddr) { #ifdef CONFIG_AMIGA if (MACH_IS_AMIGA && (physaddr < 16*1024*1024)) return (void *)0xffffffff; else #endif return (void *)(physaddr+PAGE_OFFSET); } #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 */ #define MAP_NR(addr) (__pa(addr) >> PAGE_SHIFT) #endif /* !__ASSEMBLY__ */ #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 #define PAGE_BUG(page) do { \ BUG(); \ } while (0) #endif /* __KERNEL__ */ #endif /* _M68K_PAGE_H */ |