root/include/asm/io.h

/* */

INCLUDED FROM

DEFINITIONS

1. outb
2. outb_p
3. inb
4. inb_p

   1 #ifndef _ASM_IO_H
   2 #define _ASM_IO_H
   3 
   4 extern void inline outb(char value, unsigned short port)
     /*  */
   5 {
   6 __asm__ volatile ("outb %0,%1"
   7                 ::"a" ((char) value),"d" ((unsigned short) port));
   8 }
   9 
  10 extern void inline outb_p(char value, unsigned short port)
     /*  */
  11 {
  12 __asm__ volatile ("outb %0,%1\n"
  13                   "\tjmp 1f\n"
  14                 "1:\tjmp 1f\n"
  15                 "1:\tjmp 1f\n"
  16                 "1:\tjmp 1f\n"
  17                 "1:"
  18                 ::"a" ((char) value),"d" ((unsigned short) port));
  19 }
  20 
  21 extern unsigned char inline inb(unsigned short port)
     /*  */
  22 {
  23         unsigned char _v;
  24 __asm__ volatile ("inb %1,%0"
  25                 :"=a" (_v):"d" ((unsigned short) port));
  26         return _v;
  27 }
  28 
  29 extern unsigned char inline inb_p(unsigned short port)
     /*  */
  30 {
  31         unsigned char _v;
  32 __asm__ volatile ("inb %1,%0\n"
  33                   "\tjmp 1f\n"
  34                 "1:\tjmp 1f\n"
  35                 "1:\tjmp 1f\n"
  36                 "1:\tjmp 1f\n"
  37                 "1:"
  38                 :"=a" (_v):"d" ((unsigned short) port));
  39         return _v;
  40 }
  41 
  42 #endif

/* */