1 #ifndef _M68KNOMMU_IO_H 2 #define _M68KNOMMU_IO_H 3 4 #ifdef __KERNEL__ 5 6 #include <asm/virtconvert.h> 7 #include <asm-generic/iomap.h> 8 9 /* 10 * These are for ISA/PCI shared memory _only_ and should never be used 11 * on any other type of memory, including Zorro memory. They are meant to 12 * access the bus in the bus byte order which is little-endian!. 13 * 14 * readX/writeX() are used to access memory mapped devices. On some 15 * architectures the memory mapped IO stuff needs to be accessed 16 * differently. On the m68k architecture, we just read/write the 17 * memory location directly. 18 */ 19 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates 20 * two accesses to memory, which may be undesirable for some devices. 21 */ 22 23 /* 24 * swap functions are sometimes needed to interface little-endian hardware 25 */ 26 static inline unsigned short _swapw(volatile unsigned short v) 27 { 28 return ((v << 8) | (v >> 8)); 29 } 30 31 static inline unsigned int _swapl(volatile unsigned long v) 32 { 33 return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24)); 34 } 35 36 #define readb(addr) \ 37 ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; }) 38 #define readw(addr) \ 39 ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; }) 40 #define readl(addr) \ 41 ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; }) 42 43 #define readb_relaxed(addr) readb(addr) 44 #define readw_relaxed(addr) readw(addr) 45 #define readl_relaxed(addr) readl(addr) 46 47 #define writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b)) 48 #define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b)) 49 #define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b)) 50 51 #define __raw_readb readb 52 #define __raw_readw readw 53 #define __raw_readl readl 54 #define __raw_writeb writeb 55 #define __raw_writew writew 56 #define __raw_writel writel 57 58 static inline void io_outsb(unsigned int addr, const void *buf, int len) 59 { 60 volatile unsigned char *ap = (volatile unsigned char *) addr; 61 unsigned char *bp = (unsigned char *) buf; 62 while (len--) 63 *ap = *bp++; 64 } 65 66 static inline void io_outsw(unsigned int addr, const void *buf, int len) 67 { 68 volatile unsigned short *ap = (volatile unsigned short *) addr; 69 unsigned short *bp = (unsigned short *) buf; 70 while (len--) 71 *ap = _swapw(*bp++); 72 } 73 74 static inline void io_outsl(unsigned int addr, const void *buf, int len) 75 { 76 volatile unsigned int *ap = (volatile unsigned int *) addr; 77 unsigned int *bp = (unsigned int *) buf; 78 while (len--) 79 *ap = _swapl(*bp++); 80 } 81 82 static inline void io_insb(unsigned int addr, void *buf, int len) 83 { 84 volatile unsigned char *ap = (volatile unsigned char *) addr; 85 unsigned char *bp = (unsigned char *) buf; 86 while (len--) 87 *bp++ = *ap; 88 } 89 90 static inline void io_insw(unsigned int addr, void *buf, int len) 91 { 92 volatile unsigned short *ap = (volatile unsigned short *) addr; 93 unsigned short *bp = (unsigned short *) buf; 94 while (len--) 95 *bp++ = _swapw(*ap); 96 } 97 98 static inline void io_insl(unsigned int addr, void *buf, int len) 99 { 100 volatile unsigned int *ap = (volatile unsigned int *) addr; 101 unsigned int *bp = (unsigned int *) buf; 102 while (len--) 103 *bp++ = _swapl(*ap); 104 } 105 106 #define mmiowb() 107 108 /* 109 * make the short names macros so specific devices 110 * can override them as required 111 */ 112 113 #define memset_io(a,b,c) memset((void *)(a),(b),(c)) 114 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c)) 115 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c)) 116 117 #define inb(addr) readb(addr) 118 #define inw(addr) readw(addr) 119 #define inl(addr) readl(addr) 120 #define outb(x,addr) ((void) writeb(x,addr)) 121 #define outw(x,addr) ((void) writew(x,addr)) 122 #define outl(x,addr) ((void) writel(x,addr)) 123 124 #define inb_p(addr) inb(addr) 125 #define inw_p(addr) inw(addr) 126 #define inl_p(addr) inl(addr) 127 #define outb_p(x,addr) outb(x,addr) 128 #define outw_p(x,addr) outw(x,addr) 129 #define outl_p(x,addr) outl(x,addr) 130 131 #define outsb(a,b,l) io_outsb(a,b,l) 132 #define outsw(a,b,l) io_outsw(a,b,l) 133 #define outsl(a,b,l) io_outsl(a,b,l) 134 135 #define insb(a,b,l) io_insb(a,b,l) 136 #define insw(a,b,l) io_insw(a,b,l) 137 #define insl(a,b,l) io_insl(a,b,l) 138 139 #define IO_SPACE_LIMIT 0xffffffff 140 141 142 /* Values for nocacheflag and cmode */ 143 #define IOMAP_FULL_CACHING 0 144 #define IOMAP_NOCACHE_SER 1 145 #define IOMAP_NOCACHE_NONSER 2 146 #define IOMAP_WRITETHROUGH 3 147 148 static inline void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag) 149 { 150 return (void *) physaddr; 151 } 152 static inline void *ioremap(unsigned long physaddr, unsigned long size) 153 { 154 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 155 } 156 static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size) 157 { 158 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 159 } 160 static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size) 161 { 162 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); 163 } 164 static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size) 165 { 166 return __ioremap(physaddr, size, IOMAP_FULL_CACHING); 167 } 168 169 #define iounmap(addr) do { } while(0) 170 171 /* 172 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 173 * access 174 */ 175 #define xlate_dev_mem_ptr(p) __va(p) 176 177 /* 178 * Convert a virtual cached pointer to an uncached pointer 179 */ 180 #define xlate_dev_kmem_ptr(p) p 181 182 #endif /* __KERNEL__ */ 183 184 #endif /* _M68KNOMMU_IO_H */ 185