common.c

/* common.c - Global functions
 *
 * This work is licensed under the Creative Commons Attribution-NonCommercial-
 * ShareAlike 3.0 Unported License. To view a copy of this license, visit
 * http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to:
 * Creative Commons
 * 444 Castro Street, Suite 900
 * Mountain View, California, 94041, USA.
 *
 * Author(s): Drew Cross <drew@ddcross.com>
 */

#include "common.h"

//Writes a byte out to the specified port

void outb(u16int port, u8int value)
{
    asm volatile ("outb %1, %0" : : "dN" (port), "a" (value));
}

u8int inb(u16int port)
{
    u8int ret;
    asm volatile("inb %1, %0" : "=a" (ret) : "dN" (port));
    return ret;
}

u16int inw(u16int port)
{
    u16int ret;
    asm volatile ("inw %1, %0" : "=a" (ret) : "dN" (port));
    return ret;
}