arch/m68k/include/asm/io_no.h

   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, 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, 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, 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 */