io.h

linux内核

#ifndef _SYS_IO_H
#define _SYS_IO_H

#include <inttypes.h>

static inline uint8_t inb(uint16_t p)
{
  uint8_t v;
  asm volatile("inb %1,%0" : "=a" (v) : "Nd" (p));
  return v;
}

static inline uint16_t inw(uint16_t p)
{
  uint16_t v;
  asm volatile("inw %1,%0" : "=a" (v) : "Nd" (p));
  return v;
}

static inline uint32_t inl(uint16_t p)
{
  uint32_t v;
  asm volatile("inl %1,%0" : "=a" (v) : "Nd" (p));
  return v;
}

static inline void outb(uint8_t v, uint16_t p)
{
  asm volatile("outb %0,%1" : : "a" (v), "Nd" (p));
}

static inline void outw(uint16_t v, uint16_t p)
{
  asm volatile("outw %0,%1" : : "a" (v), "Nd" (p));
}

static inline void outl(uint32_t v, uint16_t p)
{
  asm volatile("outl %0,%1" : : "a" (v), "Nd" (p));
}

#endif /* _SYS_IO_H */