include/asm/io.h

   1 #ifndef IO_H
   2 #define IO_H
   3
   4
   5 #define outb(value, port)                       \
   6   __asm__ ("outb %%al, %%dx\n\t"                \
   7            ::"a"(value),"d"(port))
   8
   9 #define inb(port) ({                            \
  10       unsigned char _v;                                  \
  11       __asm__ volatile ("inb %%dx,%%al":"=a" (_v):"d" (port));  \
  12       _v;                                                       \
  13     })
  14
  15
  16 #define outb_p(value, port)                     \
  17   __asm__ ("outb %%al, %%dx\n\t"                \
  18            "jmp 1f\n\t"                         \
  19            "1: jmp 1f\n\t"                      \
  20            "1:" ::"a"(value),"d"(port))
  21
  22 #define inb_p(port) ({                          \
  23       unsigned char _v;                         \
  24       __asm__ volatile ("inb %%dx, %%al\n\t"    \
  25                         "jmp 1f\n\t"            \
  26                         "1:jmp 1f\n\t"                  \
  27                         "1:":"=a"(_v):"d"(port));       \
  28       _v;                                               \
  29     })
  30
  31
  32 #define insl(port, buf, nr)                     \
  33   __asm__ ("cld;rep;insl\n\t"                   \
  34            ::"d"(port), "D"(buf), "c"(nr))
  35
  36 #define outsl(buf, nr, port)                    \
  37   __asm__ ("cld;rep;outsl\n\t"                  \
  38            ::"d"(port), "S" (buf), "c" (nr))
  39
  40 #endif /* _IO_H */