1.\" $NetBSD: clock.4,v 1.4 2006/02/25 22:57:09 wiz Exp $ 2.\" 3.\" Copyright (c) 2006 Stephan Meisinger 4.\" 5.\" This software was developed by the Computer Systems Engineering group 6.\" at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7.\" contributed to Berkeley. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by the NetBSD 20.\" Foundation, Inc. and its contributors. 21.\" 4. Neither the name of The NetBSD Foundation nor the names of its 22.\" contributors may be used to endorse or promote products derived 23.\" from this software without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35.\" POSSIBILITY OF SUCH DAMAGE. 36.\" 37.Dd February 24, 2006 38.Dt CLOCK 4 sparc 39.Os 40.Sh NAME 41.Nm clock , 42.Nm oclock 43.Nd Clock driver for Sun SPARC computers 44.Sh SYNOPSIS 45.Cd "clock0 at mainbus0 # sun4c" 46.Cd "clock0 at obio0 # sun4m" 47.Cd "clock0 at obio0 addr 0xf2000000 # sun4/300" 48.Pp 49.Cd "ooclock0 at obio0 addr 0xf3000000 # sun4/200" 50.Cd "ooclock0 at obio0 addr 0x03000000 # sun4/100" 51.Sh DESCRIPTION 52The 53.Nm 54device contains common timer, clock and eeprom routines for the 55.Nx 56kernel. 57.Pp 58All system use the timer interrupt to drive the hard clock. 59The second interrupt is used to drive statistics clock, except 60sun4/100 and sun4/200 machines, which don't have a spare timer 61device. 62.Sh HARDWARE 63The 64.Nm 65driver provides support for the following chips: 66.Pp 67.Bl -tag -width Dv -offset indent -compact 68.It Tn Dallas DS1287A 69.It Tn Intersil 7170 70.It Tn Mostek Mk48T02 71.It Tn Mostek Mk48T08 72.El 73.Sh SEE ALSO 74.Xr sparc/timer 4 75.Sh HISTORY 76The 77.Nm 78appeared in 79.Nx 1.0 . 80