kern/io.h

//a.michelizza.free.fr
#include "types.h"

#define cli asm("cli"::)

#define sti asm("sti"::)

#define outb(port,value) \
    asm volatile ("outb %%al, %%dx" :: "d" (port), "a" (value));

#define outbp(port,value) \
    asm volatile ("outb %%al, %%dx; jmp 1f; 1:" :: "d" (port), "a" (value));

#define inb(port) ({    \
    unsigned char _v;       \
    asm volatile ("inb %%dx, %%al" : "=a" (_v) : "d" (port)); \
        _v;     \
})

#define outw(port,value) \
    asm volatile ("outw %%ax, %%dx" :: "d" (port), "a" (value));

#define inw(port) ({        \
    u16 _v;         \
    asm volatile ("inw %%dx, %%ax" : "=a" (_v) : "d" (port));   \
        _v;         \
})