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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 | #ifndef _M68KNOMMU_IO_H #define _M68KNOMMU_IO_H #ifdef __KERNEL__ #include <asm/virtconvert.h> /* * These are for ISA/PCI shared memory _only_ and should never be used * on any other type of memory, including Zorro memory. They are meant to * access the bus in the bus byte order which is little-endian!. * * readX/writeX() are used to access memory mapped devices. On some * architectures the memory mapped IO stuff needs to be accessed * differently. On the m68k architecture, we just read/write the * memory location directly. */ /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates * two accesses to memory, which may be undesirable for some devices. */ /* * swap functions are sometimes needed to interface little-endian hardware */ static inline unsigned short _swapw(volatile unsigned short v) { return ((v << 8) | (v >> 8)); } static inline unsigned int _swapl(volatile unsigned long v) { return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24)); } #define readb(addr) \ ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; }) #define readw(addr) \ ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; }) #define readl(addr) \ ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; }) #define readb_relaxed(addr) readb(addr) #define readw_relaxed(addr) readw(addr) #define readl_relaxed(addr) readl(addr) #define writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b)) #define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b)) #define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b)) #define __raw_readb readb #define __raw_readw readw #define __raw_readl readl #define __raw_writeb writeb #define __raw_writew writew #define __raw_writel writel static inline void io_outsb(unsigned int addr, void *buf, int len) { volatile unsigned char *ap = (volatile unsigned char *) addr; unsigned char *bp = (unsigned char *) buf; while (len--) *ap = *bp++; } static inline void io_outsw(unsigned int addr, void *buf, int len) { volatile unsigned short *ap = (volatile unsigned short *) addr; unsigned short *bp = (unsigned short *) buf; while (len--) *ap = _swapw(*bp++); } static inline void io_outsl(unsigned int addr, void *buf, int len) { volatile unsigned int *ap = (volatile unsigned int *) addr; unsigned int *bp = (unsigned int *) buf; while (len--) *ap = _swapl(*bp++); } static inline void io_insb(unsigned int addr, void *buf, int len) { volatile unsigned char *ap = (volatile unsigned char *) addr; unsigned char *bp = (unsigned char *) buf; while (len--) *bp++ = *ap; } static inline void io_insw(unsigned int addr, void *buf, int len) { volatile unsigned short *ap = (volatile unsigned short *) addr; unsigned short *bp = (unsigned short *) buf; while (len--) *bp++ = _swapw(*ap); } static inline void io_insl(unsigned int addr, void *buf, int len) { volatile unsigned int *ap = (volatile unsigned int *) addr; unsigned int *bp = (unsigned int *) buf; while (len--) *bp++ = _swapl(*ap); } #define mmiowb() /* * make the short names macros so specific devices * can override them as required */ #define memset_io(a,b,c) memset((void *)(a),(b),(c)) #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c)) #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c)) #define inb(addr) readb(addr) #define inw(addr) readw(addr) #define inl(addr) readl(addr) #define outb(x,addr) ((void) writeb(x,addr)) #define outw(x,addr) ((void) writew(x,addr)) #define outl(x,addr) ((void) writel(x,addr)) #define inb_p(addr) inb(addr) #define inw_p(addr) inw(addr) #define inl_p(addr) inl(addr) #define outb_p(x,addr) outb(x,addr) #define outw_p(x,addr) outw(x,addr) #define outl_p(x,addr) outl(x,addr) #define outsb(a,b,l) io_outsb(a,b,l) #define outsw(a,b,l) io_outsw(a,b,l) #define outsl(a,b,l) io_outsl(a,b,l) #define insb(a,b,l) io_insb(a,b,l) #define insw(a,b,l) io_insw(a,b,l) #define insl(a,b,l) io_insl(a,b,l) #define IO_SPACE_LIMIT 0xffffffff /* Values for nocacheflag and cmode */ #define IOMAP_FULL_CACHING 0 #define IOMAP_NOCACHE_SER 1 #define IOMAP_NOCACHE_NONSER 2 #define IOMAP_WRITETHROUGH 3 static inline void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag) { return (void *) physaddr; } static inline void *ioremap(unsigned long physaddr, unsigned long size) { return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); } static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size) { return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); } static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size) { return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); } static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size) { return __ioremap(physaddr, size, IOMAP_FULL_CACHING); } #define iounmap(addr) do { } while(0) /* * Convert a physical pointer to a virtual kernel pointer for /dev/mem * access */ #define xlate_dev_mem_ptr(p) __va(p) /* * Convert a virtual cached pointer to an uncached pointer */ #define xlate_dev_kmem_ptr(p) p #endif /* __KERNEL__ */ #endif /* _M68KNOMMU_IO_H */ |