timerreg.h revision 256281
1144966Svkashyap/*- 2169400Sscottl * Copyright (C) 2005 TAKAHASHI Yoshihiro. All rights reserved. 3144966Svkashyap * 4144966Svkashyap * Redistribution and use in source and binary forms, with or without 5144966Svkashyap * modification, are permitted provided that the following conditions 6144966Svkashyap * are met: 7144966Svkashyap * 1. Redistributions of source code must retain the above copyright 8144966Svkashyap * notice, this list of conditions and the following disclaimer. 9144966Svkashyap * 2. Redistributions in binary form must reproduce the above copyright 10144966Svkashyap * notice, this list of conditions and the following disclaimer in the 11144966Svkashyap * documentation and/or other materials provided with the distribution. 12144966Svkashyap * 13144966Svkashyap * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14144966Svkashyap * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15144966Svkashyap * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16144966Svkashyap * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17144966Svkashyap * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18144966Svkashyap * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19144966Svkashyap * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20144966Svkashyap * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21144966Svkashyap * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22144966Svkashyap * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23144966Svkashyap * SUCH DAMAGE. 24144966Svkashyap * 25144966Svkashyap * $FreeBSD: stable/10/sys/pc98/include/timerreg.h 177642 2008-03-26 20:09:21Z phk $ 26144966Svkashyap */ 27144966Svkashyap 28144966Svkashyap/* 29144966Svkashyap * The outputs of the three timers are connected as follows: 30144966Svkashyap * 31144966Svkashyap * timer 0 -> irq 0 32144966Svkashyap * timer 1 -> speaker (via keyboard controller) 33144966Svkashyap * timer 2 -> RS-232C 34169400Sscottl * 35144966Svkashyap * Timer 0 is used to call hardclock. 36144966Svkashyap * Timer 1 is used to generate console beeps. 37144966Svkashyap */ 38144966Svkashyap 39144966Svkashyap#ifndef _MACHINE_TIMERREG_H_ 40144966Svkashyap#define _MACHINE_TIMERREG_H_ 41144966Svkashyap 42144966Svkashyap#ifdef _KERNEL 43144966Svkashyap 44144966Svkashyap#include <dev/ic/i8253reg.h> 45144966Svkashyap 46144966Svkashyap#define IO_TIMER1 0x71 /* 8253C Timer */ 47144966Svkashyap#define TIMER_CNTR0 (IO_TIMER1 + TIMER_REG_CNTR0 * 2) 48144966Svkashyap#define TIMER_CNTR1 0x3fdb 49144966Svkashyap#define TIMER_CNTR2 (IO_TIMER1 + TIMER_REG_CNTR2 * 2) 50144966Svkashyap#define TIMER_MODE (IO_TIMER1 + TIMER_REG_MODE * 2) 51144966Svkashyap 52144966Svkashyap#endif /* _KERNEL */ 53144966Svkashyap 54144966Svkashyap#endif /* _MACHINE_TIMERREG_H_ */ 55144966Svkashyap