/* -*- Mode: C; c-basic-offset: 3 -*-
 *
 * io.h - Simple IA32 I/O macros
 *
 * This file is part of Metalkit, a simple collection of modules for
 * writing software that runs on the bare metal. Get the latest code
 * at http://svn.navi.cx/misc/trunk/metalkit/
 *
 * Copyright (c) 2008-2009 Micah Dowty
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef __IO_H__
#define __IO_H__

#include "types.h"

static __inline__ void
IO_Out8(uint16 port, uint8 value)
{
   __asm__ __volatile__ ("outb %0, %1" : :"a" (value), "d" (port));
}

static __inline__ void
IO_Out16(uint16 port, uint16 value)
{
   __asm__ __volatile__ ("outw %0, %1" : :"a" (value), "d" (port));
}

static __inline__ void
IO_Out32(uint16 port, uint32 value)
{
   __asm__ __volatile__ ("outl %0, %1" : :"a" (value), "d" (port));
}

static __inline__ uint8
IO_In8(uint16 port)
{
   uint8 value;
   __asm__ __volatile__ ("inb %1, %0" :"=a" (value) :"d" (port));
   return value;
}

static __inline__ uint16
IO_In16(uint16 port)
{
   uint16 value;
   __asm__ __volatile__ ("inw %1, %0" :"=a" (value) :"d" (port));
   return value;
}

static __inline__ uint32
IO_In32(uint16 port)
{
   uint32 value;
   __asm__ __volatile__ ("inl %1, %0" :"=a" (value) :"d" (port));
   return value;
}

#endif /* __IO_H__ */