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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 | #ifndef _M68K_PAGE_H #define _M68K_PAGE_H #include <linux/config.h> /* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT 12 #define PAGE_SIZE (1UL << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #ifdef __KERNEL__ #include <asm/setup.h> #include <asm/bootinfo.h> #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.. */ #define PAGE_OFFSET 0 #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; #endif #ifdef CONFIG_MAC if (MACH_IS_MAC && (physaddr >= mac_bi_data.videoaddr) && (physaddr < mac_bi_data.videoaddr + (mac_bi_data.videorow * (mac_bi_data.dimensions>>16)))) return (void *)0xffffffff; #endif return (void *)(physaddr+PAGE_OFFSET); } #define MAP_NR(addr) (__pa(addr) >> PAGE_SHIFT) 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 /* __KERNEL__ */ #endif /* _M68K_PAGE_H */ |