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