1/*-
2 * Copyright (C) 2005 TAKAHASHI Yoshihiro. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD$
26 */
27
28/*
29 * The outputs of the three timers are connected as follows:
30 *
31 *	 timer 0 -> irq 0
32 *	 timer 1 -> speaker (via keyboard controller)
33 * 	 timer 2 -> RS-232C
34 *
35 * Timer 0 is used to call hardclock.
36 * Timer 1 is used to generate console beeps.
37 */
38
39#ifndef _MACHINE_TIMERREG_H_
40#define _MACHINE_TIMERREG_H_
41
42#ifdef _KERNEL
43
44#include <dev/ic/i8253reg.h>
45
46#define	IO_TIMER1	0x71		/* 8253C Timer */
47#define	TIMER_CNTR0	(IO_TIMER1 + TIMER_REG_CNTR0 * 2)
48#define	TIMER_CNTR1	0x3fdb
49#define	TIMER_CNTR2	(IO_TIMER1 + TIMER_REG_CNTR2 * 2)
50#define	TIMER_MODE	(IO_TIMER1 + TIMER_REG_MODE * 2)
51
52#endif /* _KERNEL */
53
54#endif /* _MACHINE_TIMERREG_H_ */
55