// io.h
// Author: Josh Holtrop
// Created: 02/26/04
// Implements basic port input/output functions

#ifndef __HOS_IO__
#define __HOS_IO__ __HOS_IO__

#include "hos_defines.h"

//void outportb(unsigned int port, unsigned char value);
//inline void outportw(unsigned int port, unsigned int value);
//inline unsigned char inportb(unsigned short port);

//Writes a byte out to a port
static inline void outportb(unsigned int port, unsigned char value)		// Output a byte to a port
{
    asm volatile ("outb %%al,%%dx"::"d" (port), "a" (value));
}

//Writes a word out to a port
static inline void outportw(unsigned int port, unsigned int value)		// Output a word to a port
{
    asm volatile ("outw %%ax,%%dx"::"d" (port), "a" (value));
}

//Reads a byte from a port
static inline unsigned char inportb(unsigned short port)
{
	unsigned char ret_val;

	asm volatile("inb %w1,%b0"
		: "=a"(ret_val)
		: "d"(port));
	return ret_val;
}

#endif