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   1 /*
   2  * linux/include/asm-m68k/raw_io.h
   3  *
   4  * 10/20/00 RZ: - created from bits of io.h and ide.h to cleanup namespace
   5  *
   6  */
   7
   8 #ifndef _RAW_IO_H
   9 #define _RAW_IO_H
  10
  11 #ifdef __KERNEL__
  12
  13 #include <asm/types.h>
  14
  15
  16 /* Values for nocacheflag and cmode */
  17 #define IOMAP_FULL_CACHING              0
  18 #define IOMAP_NOCACHE_SER               1
  19 #define IOMAP_NOCACHE_NONSER            2
  20 #define IOMAP_WRITETHROUGH              3
  21
  22 extern void iounmap(void *addr);
  23
  24 extern void *__ioremap(unsigned long physaddr, unsigned long size,
  25                        int cacheflag);
  26 extern void __iounmap(void *addr, unsigned long size);
  27
  28
  29 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
  30  * two accesses to memory, which may be undesirable for some devices.
  31  */
  32 #define in_8(addr) \
  33     ({ u8 __v = (*(volatile u8 *) (addr)); __v; })
  34 #define in_be16(addr) \
  35     ({ u16 __v = (*(volatile u16 *) (addr)); __v; })
  36 #define in_be32(addr) \
  37     ({ u32 __v = (*(volatile u32 *) (addr)); __v; })
  38 #define in_le16(addr) \
  39     ({ u16 __v = le16_to_cpu(*(volatile u16 *) (addr)); __v; })
  40 #define in_le32(addr) \
  41     ({ u32 __v = le32_to_cpu(*(volatile u32 *) (addr)); __v; })
  42
  43 #define out_8(addr,b) (void)((*(volatile u8 *) (addr)) = (b))
  44 #define out_be16(addr,w) (void)((*(volatile u16 *) (addr)) = (w))
  45 #define out_be32(addr,l) (void)((*(volatile u32 *) (addr)) = (l))
  46 #define out_le16(addr,w) (void)((*(volatile u16 *) (addr)) = cpu_to_le16(w))
  47 #define out_le32(addr,l) (void)((*(volatile u32 *) (addr)) = cpu_to_le32(l))
  48
  49 #define raw_inb in_8
  50 #define raw_inw in_be16
  51 #define raw_inl in_be32
  52
  53 #define raw_outb(val,port) out_8((port),(val))
  54 #define raw_outw(val,port) out_be16((port),(val))
  55 #define raw_outl(val,port) out_be32((port),(val))
  56
  57 static inline void raw_insb(volatile u8 *port, u8 *buf, unsigned int len)
  58 {
  59         unsigned int i;
  60
  61         for (i = 0; i < len; i++)
  62                 *buf++ = in_8(port);
  63 }
  64
  65 static inline void raw_outsb(volatile u8 *port, const u8 *buf,
  66                              unsigned int len)
  67 {
  68         unsigned int i;
  69
  70         for (i = 0; i < len; i++)
  71                 out_8(port, *buf++);
  72 }
  73
  74 static inline void raw_insw(volatile u16 *port, u16 *buf, unsigned int nr)
  75 {
  76         unsigned int tmp;
  77
  78         if (nr & 15) {
  79                 tmp = (nr & 15) - 1;
  80                 asm volatile (
  81                         "1: movew %2@,%0@+; dbra %1,1b"
  82                         : "=a" (buf), "=d" (tmp)
  83                         : "a" (port), "0" (buf),
  84                           "1" (tmp));
  85         }
  86         if (nr >> 4) {
  87                 tmp = (nr >> 4) - 1;
  88                 asm volatile (
  89                         "1: "
  90                         "movew %2@,%0@+; "
  91                         "movew %2@,%0@+; "
  92                         "movew %2@,%0@+; "
  93                         "movew %2@,%0@+; "
  94                         "movew %2@,%0@+; "
  95                         "movew %2@,%0@+; "
  96                         "movew %2@,%0@+; "
  97                         "movew %2@,%0@+; "
  98                         "movew %2@,%0@+; "
  99                         "movew %2@,%0@+; "
 100                         "movew %2@,%0@+; "
 101                         "movew %2@,%0@+; "
 102                         "movew %2@,%0@+; "
 103                         "movew %2@,%0@+; "
 104                         "movew %2@,%0@+; "
 105                         "movew %2@,%0@+; "
 106                         "dbra %1,1b"
 107                         : "=a" (buf), "=d" (tmp)
 108                         : "a" (port), "0" (buf),
 109                           "1" (tmp));
 110         }
 111 }
 112
 113 static inline void raw_outsw(volatile u16 *port, const u16 *buf,
 114                              unsigned int nr)
 115 {
 116         unsigned int tmp;
 117
 118         if (nr & 15) {
 119                 tmp = (nr & 15) - 1;
 120                 asm volatile (
 121                         "1: movew %0@+,%2@; dbra %1,1b"
 122                         : "=a" (buf), "=d" (tmp)
 123                         : "a" (port), "0" (buf),
 124                           "1" (tmp));
 125         }
 126         if (nr >> 4) {
 127                 tmp = (nr >> 4) - 1;
 128                 asm volatile (
 129                         "1: "
 130                         "movew %0@+,%2@; "
 131                         "movew %0@+,%2@; "
 132                         "movew %0@+,%2@; "
 133                         "movew %0@+,%2@; "
 134                         "movew %0@+,%2@; "
 135                         "movew %0@+,%2@; "
 136                         "movew %0@+,%2@; "
 137                         "movew %0@+,%2@; "
 138                         "movew %0@+,%2@; "
 139                         "movew %0@+,%2@; "
 140                         "movew %0@+,%2@; "
 141                         "movew %0@+,%2@; "
 142                         "movew %0@+,%2@; "
 143                         "movew %0@+,%2@; "
 144                         "movew %0@+,%2@; "
 145                         "movew %0@+,%2@; "
 146                         "dbra %1,1b"
 147                         : "=a" (buf), "=d" (tmp)
 148                         : "a" (port), "0" (buf),
 149                           "1" (tmp));
 150         }
 151 }
 152
 153 static inline void raw_insl(volatile u32 *port, u32 *buf, unsigned int nr)
 154 {
 155         unsigned int tmp;
 156
 157         if (nr & 15) {
 158                 tmp = (nr & 15) - 1;
 159                 asm volatile (
 160                         "1: movel %2@,%0@+; dbra %1,1b"
 161                         : "=a" (buf), "=d" (tmp)
 162                         : "a" (port), "0" (buf),
 163                           "1" (tmp));
 164         }
 165         if (nr >> 4) {
 166                 tmp = (nr >> 4) - 1;
 167                 asm volatile (
 168                         "1: "
 169                         "movel %2@,%0@+; "
 170                         "movel %2@,%0@+; "
 171                         "movel %2@,%0@+; "
 172                         "movel %2@,%0@+; "
 173                         "movel %2@,%0@+; "
 174                         "movel %2@,%0@+; "
 175                         "movel %2@,%0@+; "
 176                         "movel %2@,%0@+; "
 177                         "movel %2@,%0@+; "
 178                         "movel %2@,%0@+; "
 179                         "movel %2@,%0@+; "
 180                         "movel %2@,%0@+; "
 181                         "movel %2@,%0@+; "
 182                         "movel %2@,%0@+; "
 183                         "movel %2@,%0@+; "
 184                         "movel %2@,%0@+; "
 185                         "dbra %1,1b"
 186                         : "=a" (buf), "=d" (tmp)
 187                         : "a" (port), "0" (buf),
 188                           "1" (tmp));
 189         }
 190 }
 191
 192 static inline void raw_outsl(volatile u32 *port, const u32 *buf,
 193                              unsigned int nr)
 194 {
 195         unsigned int tmp;
 196
 197         if (nr & 15) {
 198                 tmp = (nr & 15) - 1;
 199                 asm volatile (
 200                         "1: movel %0@+,%2@; dbra %1,1b"
 201                         : "=a" (buf), "=d" (tmp)
 202                         : "a" (port), "0" (buf),
 203                           "1" (tmp));
 204         }
 205         if (nr >> 4) {
 206                 tmp = (nr >> 4) - 1;
 207                 asm volatile (
 208                         "1: "
 209                         "movel %0@+,%2@; "
 210                         "movel %0@+,%2@; "
 211                         "movel %0@+,%2@; "
 212                         "movel %0@+,%2@; "
 213                         "movel %0@+,%2@; "
 214                         "movel %0@+,%2@; "
 215                         "movel %0@+,%2@; "
 216                         "movel %0@+,%2@; "
 217                         "movel %0@+,%2@; "
 218                         "movel %0@+,%2@; "
 219                         "movel %0@+,%2@; "
 220                         "movel %0@+,%2@; "
 221                         "movel %0@+,%2@; "
 222                         "movel %0@+,%2@; "
 223                         "movel %0@+,%2@; "
 224                         "movel %0@+,%2@; "
 225                         "dbra %1,1b"
 226                         : "=a" (buf), "=d" (tmp)
 227                         : "a" (port), "0" (buf),
 228                           "1" (tmp));
 229         }
 230 }
 231
 232
 233 static inline void raw_insw_swapw(volatile u16 *port, u16 *buf,
 234                                   unsigned int nr)
 235 {
 236     if ((nr) % 8)
 237         __asm__ __volatile__
 238                ("\tmovel %0,%/a0\n\t"
 239                 "movel %1,%/a1\n\t"
 240                 "movel %2,%/d6\n\t"
 241                 "subql #1,%/d6\n"
 242                 "1:\tmovew %/a0@,%/d0\n\t"
 243                 "rolw  #8,%/d0\n\t"
 244                 "movew %/d0,%/a1@+\n\t"
 245                 "dbra %/d6,1b"
 246                 :
 247                 : "g" (port), "g" (buf), "g" (nr)
 248                 : "d0", "a0", "a1", "d6");
 249     else
 250         __asm__ __volatile__
 251                ("movel %0,%/a0\n\t"
 252                 "movel %1,%/a1\n\t"
 253                 "movel %2,%/d6\n\t"
 254                 "lsrl  #3,%/d6\n\t"
 255                 "subql #1,%/d6\n"
 256                 "1:\tmovew %/a0@,%/d0\n\t"
 257                 "rolw  #8,%/d0\n\t"
 258                 "movew %/d0,%/a1@+\n\t"
 259                 "movew %/a0@,%/d0\n\t"
 260                 "rolw  #8,%/d0\n\t"
 261                 "movew %/d0,%/a1@+\n\t"
 262                 "movew %/a0@,%/d0\n\t"
 263                 "rolw  #8,%/d0\n\t"
 264                 "movew %/d0,%/a1@+\n\t"
 265                 "movew %/a0@,%/d0\n\t"
 266                 "rolw  #8,%/d0\n\t"
 267                 "movew %/d0,%/a1@+\n\t"
 268                 "movew %/a0@,%/d0\n\t"
 269                 "rolw  #8,%/d0\n\t"
 270                 "movew %/d0,%/a1@+\n\t"
 271                 "movew %/a0@,%/d0\n\t"
 272                 "rolw  #8,%/d0\n\t"
 273                 "movew %/d0,%/a1@+\n\t"
 274                 "movew %/a0@,%/d0\n\t"
 275                 "rolw  #8,%/d0\n\t"
 276                 "movew %/d0,%/a1@+\n\t"
 277                 "movew %/a0@,%/d0\n\t"
 278                 "rolw  #8,%/d0\n\t"
 279                 "movew %/d0,%/a1@+\n\t"
 280                 "dbra %/d6,1b"
 281                 :
 282                 : "g" (port), "g" (buf), "g" (nr)
 283                 : "d0", "a0", "a1", "d6");
 284 }
 285
 286 static inline void raw_outsw_swapw(volatile u16 *port, const u16 *buf,
 287                                    unsigned int nr)
 288 {
 289     if ((nr) % 8)
 290         __asm__ __volatile__
 291                ("movel %0,%/a0\n\t"
 292                 "movel %1,%/a1\n\t"
 293                 "movel %2,%/d6\n\t"
 294                 "subql #1,%/d6\n"
 295                 "1:\tmovew %/a1@+,%/d0\n\t"
 296                 "rolw  #8,%/d0\n\t"
 297                 "movew %/d0,%/a0@\n\t"
 298                 "dbra %/d6,1b"
 299                 :
 300                 : "g" (port), "g" (buf), "g" (nr)
 301                 : "d0", "a0", "a1", "d6");
 302     else
 303         __asm__ __volatile__
 304                ("movel %0,%/a0\n\t"
 305                 "movel %1,%/a1\n\t"
 306                 "movel %2,%/d6\n\t"
 307                 "lsrl  #3,%/d6\n\t"
 308                 "subql #1,%/d6\n"
 309                 "1:\tmovew %/a1@+,%/d0\n\t"
 310                 "rolw  #8,%/d0\n\t"
 311                 "movew %/d0,%/a0@\n\t"
 312                 "movew %/a1@+,%/d0\n\t"
 313                 "rolw  #8,%/d0\n\t"
 314                 "movew %/d0,%/a0@\n\t"
 315                 "movew %/a1@+,%/d0\n\t"
 316                 "rolw  #8,%/d0\n\t"
 317                 "movew %/d0,%/a0@\n\t"
 318                 "movew %/a1@+,%/d0\n\t"
 319                 "rolw  #8,%/d0\n\t"
 320                 "movew %/d0,%/a0@\n\t"
 321                 "movew %/a1@+,%/d0\n\t"
 322                 "rolw  #8,%/d0\n\t"
 323                 "movew %/d0,%/a0@\n\t"
 324                 "movew %/a1@+,%/d0\n\t"
 325                 "rolw  #8,%/d0\n\t"
 326                 "movew %/d0,%/a0@\n\t"
 327                 "movew %/a1@+,%/d0\n\t"
 328                 "rolw  #8,%/d0\n\t"
 329                 "movew %/d0,%/a0@\n\t"
 330                 "movew %/a1@+,%/d0\n\t"
 331                 "rolw  #8,%/d0\n\t"
 332                 "movew %/d0,%/a0@\n\t"
 333                 "dbra %/d6,1b"
 334                 :
 335                 : "g" (port), "g" (buf), "g" (nr)
 336                 : "d0", "a0", "a1", "d6");
 337 }
 338
 339
 340 #endif /* __KERNEL__ */
 341
 342 #endif /* _RAW_IO_H */