42_KFS/libbozo/headers/sys/io.h

#pragma once

#include "types.h"
#include <stddef.h>
#include <stdint.h>

static inline void outb(u16 port, u8 val)
{
	__asm__ volatile("outb %b0, %w1" : : "a"(val), "Nd"(port) : "memory");
}

static inline u8 inb(u16 port)
{
	u8 ret;
	__asm__ volatile("inb %w1, %b0" : "=a"(ret) : "Nd"(port) : "memory");
	return ret;
}

static inline void outw(u16 port, u16 val)
{
	__asm__ volatile("outb %b0, %w1" : : "a"(val), "Nd"(port) : "memory");
}

static inline u16 inw(u16 port)
{
	u8 ret;
	__asm__ volatile("inb %w1, %b0" : "=a"(ret) : "Nd"(port) : "memory");
	return ret;
}

static inline void io_wait(void)
{
	outb(0x80, 0);
}