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 writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b)) 44 #define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b)) 45 #define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b)) 46 47 #define __raw_readb readb 48 #define __raw_readw readw 49 #define __raw_readl readl 50 #define __raw_writeb writeb 51 #define __raw_writew writew 52 #define __raw_writel writel 53 54 static inline void io_outsb(unsigned int addr, const void *buf, int len) 55 { 56 volatile unsigned char *ap = (volatile unsigned char *) addr; 57 unsigned char *bp = (unsigned char *) buf; 58 while (len--) 59 *ap = *bp++; 60 } 61 62 static inline void io_outsw(unsigned int addr, const void *buf, int len) 63 { 64 volatile unsigned short *ap = (volatile unsigned short *) addr; 65 unsigned short *bp = (unsigned short *) buf; 66 while (len--) 67 *ap = _swapw(*bp++); 68 } 69 70 static inline void io_outsl(unsigned int addr, const void *buf, int len) 71 { 72 volatile unsigned int *ap = (volatile unsigned int *) addr; 73 unsigned int *bp = (unsigned int *) buf; 74 while (len--) 75 *ap = _swapl(*bp++); 76 } 77 78 static inline void io_insb(unsigned int addr, void *buf, int len) 79 { 80 volatile unsigned char *ap = (volatile unsigned char *) addr; 81 unsigned char *bp = (unsigned char *) buf; 82 while (len--) 83 *bp++ = *ap; 84 } 85 86 static inline void io_insw(unsigned int addr, void *buf, int len) 87 { 88 volatile unsigned short *ap = (volatile unsigned short *) addr; 89 unsigned short *bp = (unsigned short *) buf; 90 while (len--) 91 *bp++ = _swapw(*ap); 92 } 93 94 static inline void io_insl(unsigned int addr, void *buf, int len) 95 { 96 volatile unsigned int *ap = (volatile unsigned int *) addr; 97 unsigned int *bp = (unsigned int *) buf; 98 while (len--) 99 *bp++ = _swapl(*ap); 100 } 101 102 #define mmiowb() 103 104 /* 105 * make the short names macros so specific devices 106 * can override them as required 107 */ 108 109 #define memset_io(a,b,c) memset((void *)(a),(b),(c)) 110 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c)) 111 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c)) 112 113 #define inb(addr) readb(addr) 114 #define inw(addr) readw(addr) 115 #define inl(addr) readl(addr) 116 #define outb(x,addr) ((void) writeb(x,addr)) 117 #define outw(x,addr) ((void) writew(x,addr)) 118 #define outl(x,addr) ((void) writel(x,addr)) 119 120 #define inb_p(addr) inb(addr) 121 #define inw_p(addr) inw(addr) 122 #define inl_p(addr) inl(addr) 123 #define outb_p(x,addr) outb(x,addr) 124 #define outw_p(x,addr) outw(x,addr) 125 #define outl_p(x,addr) outl(x,addr) 126 127 #define outsb(a,b,l) io_outsb(a,b,l) 128 #define outsw(a,b,l) io_outsw(a,b,l) 129 #define outsl(a,b,l) io_outsl(a,b,l) 130 131 #define insb(a,b,l) io_insb(a,b,l) 132 #define insw(a,b,l) io_insw(a,b,l) 133 #define insl(a,b,l) io_insl(a,b,l) 134 135 #define IO_SPACE_LIMIT 0xffffffff 136 137 138 /* Values for nocacheflag and cmode */ 139 #define IOMAP_FULL_CACHING 0 140 #define IOMAP_NOCACHE_SER 1 141 #define IOMAP_NOCACHE_NONSER 2 142 #define IOMAP_WRITETHROUGH 3 143 144 static inline void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag) 145 { 146 return (void *) physaddr; 147 } 148 static inline void *ioremap(unsigned long physaddr, unsigned long size) 149 { 150 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 151 } 152 static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size) 153 { 154 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 155 } 156 static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size) 157 { 158 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); 159 } 160 static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size) 161 { 162 return __ioremap(physaddr, size, IOMAP_FULL_CACHING); 163 } 164 165 #define iounmap(addr) do { } while(0) 166 167 /* 168 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 169 * access 170 */ 171 #define xlate_dev_mem_ptr(p) __va(p) 172 173 /* 174 * Convert a virtual cached pointer to an uncached pointer 175 */ 176 #define xlate_dev_kmem_ptr(p) p 177 178 static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) 179 { 180 return (void __iomem *) port; 181 } 182 183 static inline void ioport_unmap(void __iomem *p) 184 { 185 } 186 187 #endif /* __KERNEL__ */ 188 189 #endif /* _M68KNOMMU_IO_H */ 190