include/arch/x86/io.h

   1 #ifndef X86_IO_H
   2 #define X86_IO_H
   3
   4 #include <stdint.h>
   5
   6 static inline void outb(uint16_t port, uint8_t value)
   7 {
   8         asm volatile ("outb %0, %1": : "a" (value), "Nd" (port));
   9 }
  10
  11 static inline uint8_t inb(uint16_t port)
  12 {
  13         uint8_t ret;
  14         asm volatile ("inb %1, %0"
  15                                         : "=a" (ret)
  16                                         : "d" (port));
  17         return ret;
  18 }
  19
  20 static inline void io_wait(void)
  21 {
  22         inb(0x80);
  23 }
  24
  25 #endif