1 #ifndef _M68KNOMMU_IO_H 2 #define _M68KNOMMU_IO_H 3 4 #ifdef __KERNEL__ 5 6 #define ARCH_HAS_IOREMAP_WT 7 8 #include <asm/virtconvert.h> 9 #include <asm-generic/iomap.h> 10 11 /* 12 * These are for ISA/PCI shared memory _only_ and should never be used 13 * on any other type of memory, including Zorro memory. They are meant to 14 * access the bus in the bus byte order which is little-endian!. 15 * 16 * readX/writeX() are used to access memory mapped devices. On some 17 * architectures the memory mapped IO stuff needs to be accessed 18 * differently. On the m68k architecture, we just read/write the 19 * memory location directly. 20 */ 21 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates 22 * two accesses to memory, which may be undesirable for some devices. 23 */ 24 25 /* 26 * swap functions are sometimes needed to interface little-endian hardware 27 */ 28 static inline unsigned short _swapw(volatile unsigned short v) 29 { 30 return ((v << 8) | (v >> 8)); 31 } 32 33 static inline unsigned int _swapl(volatile unsigned long v) 34 { 35 return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24)); 36 } 37 38 #define readb(addr) \ 39 ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; }) 40 #define readw(addr) \ 41 ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; }) 42 #define readl(addr) \ 43 ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; }) 44 45 #define writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b)) 46 #define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b)) 47 #define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b)) 48 49 #define __raw_readb readb 50 #define __raw_readw readw 51 #define __raw_readl readl 52 #define __raw_writeb writeb 53 #define __raw_writew writew 54 #define __raw_writel writel 55 56 static inline void io_outsb(unsigned int addr, const void *buf, int len) 57 { 58 volatile unsigned char *ap = (volatile unsigned char *) addr; 59 unsigned char *bp = (unsigned char *) buf; 60 while (len--) 61 *ap = *bp++; 62 } 63 64 static inline void io_outsw(unsigned int addr, const void *buf, int len) 65 { 66 volatile unsigned short *ap = (volatile unsigned short *) addr; 67 unsigned short *bp = (unsigned short *) buf; 68 while (len--) 69 *ap = _swapw(*bp++); 70 } 71 72 static inline void io_outsl(unsigned int addr, const void *buf, int len) 73 { 74 volatile unsigned int *ap = (volatile unsigned int *) addr; 75 unsigned int *bp = (unsigned int *) buf; 76 while (len--) 77 *ap = _swapl(*bp++); 78 } 79 80 static inline void io_insb(unsigned int addr, void *buf, int len) 81 { 82 volatile unsigned char *ap = (volatile unsigned char *) addr; 83 unsigned char *bp = (unsigned char *) buf; 84 while (len--) 85 *bp++ = *ap; 86 } 87 88 static inline void io_insw(unsigned int addr, void *buf, int len) 89 { 90 volatile unsigned short *ap = (volatile unsigned short *) addr; 91 unsigned short *bp = (unsigned short *) buf; 92 while (len--) 93 *bp++ = _swapw(*ap); 94 } 95 96 static inline void io_insl(unsigned int addr, void *buf, int len) 97 { 98 volatile unsigned int *ap = (volatile unsigned int *) addr; 99 unsigned int *bp = (unsigned int *) buf; 100 while (len--) 101 *bp++ = _swapl(*ap); 102 } 103 104 #define mmiowb() 105 106 /* 107 * make the short names macros so specific devices 108 * can override them as required 109 */ 110 111 #define memset_io(a,b,c) memset((void *)(a),(b),(c)) 112 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c)) 113 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c)) 114 115 #define inb(addr) readb(addr) 116 #define inw(addr) readw(addr) 117 #define inl(addr) readl(addr) 118 #define outb(x,addr) ((void) writeb(x,addr)) 119 #define outw(x,addr) ((void) writew(x,addr)) 120 #define outl(x,addr) ((void) writel(x,addr)) 121 122 #define inb_p(addr) inb(addr) 123 #define inw_p(addr) inw(addr) 124 #define inl_p(addr) inl(addr) 125 #define outb_p(x,addr) outb(x,addr) 126 #define outw_p(x,addr) outw(x,addr) 127 #define outl_p(x,addr) outl(x,addr) 128 129 #define outsb(a,b,l) io_outsb(a,b,l) 130 #define outsw(a,b,l) io_outsw(a,b,l) 131 #define outsl(a,b,l) io_outsl(a,b,l) 132 133 #define insb(a,b,l) io_insb(a,b,l) 134 #define insw(a,b,l) io_insw(a,b,l) 135 #define insl(a,b,l) io_insl(a,b,l) 136 137 #define IO_SPACE_LIMIT 0xffffffff 138 139 140 /* Values for nocacheflag and cmode */ 141 #define IOMAP_FULL_CACHING 0 142 #define IOMAP_NOCACHE_SER 1 143 #define IOMAP_NOCACHE_NONSER 2 144 #define IOMAP_WRITETHROUGH 3 145 146 static inline void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag) 147 { 148 return (void *) physaddr; 149 } 150 static inline void *ioremap(unsigned long physaddr, unsigned long size) 151 { 152 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 153 } 154 static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size) 155 { 156 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 157 } 158 static inline void *ioremap_wt(unsigned long physaddr, unsigned long size) 159 { 160 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); 161 } 162 static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size) 163 { 164 return __ioremap(physaddr, size, IOMAP_FULL_CACHING); 165 } 166 167 #define iounmap(addr) do { } while(0) 168 169 /* 170 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 171 * access 172 */ 173 #define xlate_dev_mem_ptr(p) __va(p) 174 175 /* 176 * Convert a virtual cached pointer to an uncached pointer 177 */ 178 #define xlate_dev_kmem_ptr(p) p 179 180 static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) 181 { 182 return (void __iomem *) port; 183 } 184 185 static inline void ioport_unmap(void __iomem *p) 186 { 187 } 188 189 #endif /* __KERNEL__ */ 190 191 #endif /* _M68KNOMMU_IO_H */ 192