k-chow/k/io.h

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#ifndef IO_H_
#define IO_H_
#include <k/types.h>
static inline void outb(u16 port, u8 val)
{
asm volatile ("outb %0, %1" : /* No output */ : "a"(val), "d"(port));
}
static inline u8 inb(u16 port)
{
u8 res;
asm volatile ("inb %1, %0" : "=&a"(res) : "d"(port));
return res;
}
static inline void outw(u16 port, u16 val)
{
asm volatile ("outw %0, %1" : /* No output */ : "a"(val), "d"(port));
}
static inline u16 inw(u16 port)
{
u16 res;
asm volatile ("inw %1, %0" : "=&a"(res) : "d"(port));
return res;
}
#endif /* !IO_H_ */