1#ifndef _M68KNOMMU_IO_H 2#define _M68KNOMMU_IO_H 3 4#ifdef __KERNEL__ 5 6 7/* 8 * These are for ISA/PCI shared memory _only_ and should never be used 9 * on any other type of memory, including Zorro memory. They are meant to 10 * access the bus in the bus byte order which is little-endian!. 11 * 12 * readX/writeX() are used to access memory mapped devices. On some 13 * architectures the memory mapped IO stuff needs to be accessed 14 * differently. On the m68k architecture, we just read/write the 15 * memory location directly. 16 */ 17/* ++roman: The assignments to temp. vars avoid that gcc sometimes generates 18 * two accesses to memory, which may be undesireable for some devices. 19 */ 20 21/* 22 * swap functions are sometimes needed to interface little-endian hardware 23 */ 24static inline unsigned short _swapw(volatile unsigned short v) 25{ 26 return ((v << 8) | (v >> 8)); 27} 28 29static inline unsigned int _swapl(volatile unsigned long v) 30{ 31 return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24)); 32} 33 34#define readb(addr) \ 35 ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; }) 36#define readw(addr) \ 37 ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; }) 38#define readl(addr) \ 39 ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; }) 40 41#define readb_relaxed(addr) readb(addr) 42#define readw_relaxed(addr) readw(addr) 43#define readl_relaxed(addr) readl(addr) 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 56static inline void io_outsb(unsigned int addr, 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 64static inline void io_outsw(unsigned int addr, 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 72static inline void io_outsl(unsigned int addr, 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 80static 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 88static 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 96static 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 0xffff 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 146extern void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag); 147extern void __iounmap(void *addr, unsigned long size); 148 149static inline void *ioremap(unsigned long physaddr, unsigned long size) 150{ 151 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 152} 153static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size) 154{ 155 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 156} 157static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size) 158{ 159 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); 160} 161static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size) 162{ 163 return __ioremap(physaddr, size, IOMAP_FULL_CACHING); 164} 165 166extern void iounmap(void *addr); 167 168/* Nothing to do */ 169 170#define dma_cache_inv(_start,_size) do { } while (0) 171#define dma_cache_wback(_start,_size) do { } while (0) 172#define dma_cache_wback_inv(_start,_size) do { } while (0) 173 174/* Pages to physical address... */ 175#define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT) 176#define page_to_bus(page) ((page - mem_map) << PAGE_SHIFT) 177 178/* 179 * Macros used for converting between virtual and physical mappings. 180 */ 181#define mm_ptov(vaddr) ((void *) (vaddr)) 182#define mm_vtop(vaddr) ((unsigned long) (vaddr)) 183#define phys_to_virt(vaddr) ((void *) (vaddr)) 184#define virt_to_phys(vaddr) ((unsigned long) (vaddr)) 185 186#define virt_to_bus virt_to_phys 187#define bus_to_virt phys_to_virt 188 189/* 190 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 191 * access 192 */ 193#define xlate_dev_mem_ptr(p) __va(p) 194 195/* 196 * Convert a virtual cached pointer to an uncached pointer 197 */ 198#define xlate_dev_kmem_ptr(p) p 199 200#endif /* __KERNEL__ */ 201 202#endif /* _M68KNOMMU_IO_H */ 203