1.\" $NetBSD: clock.4,v 1.5 2008/05/05 19:51:23 martin Exp $ 2.\" 3.\" Copyright (c) 2006 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Stephan Meisinger. 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.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd February 24, 2006 31.Dt CLOCK 4 sparc 32.Os 33.Sh NAME 34.Nm clock , 35.Nm oclock 36.Nd Clock driver for Sun SPARC computers 37.Sh SYNOPSIS 38.Cd "clock0 at mainbus0 # sun4c" 39.Cd "clock0 at obio0 # sun4m" 40.Cd "clock0 at obio0 addr 0xf2000000 # sun4/300" 41.Pp 42.Cd "ooclock0 at obio0 addr 0xf3000000 # sun4/200" 43.Cd "ooclock0 at obio0 addr 0x03000000 # sun4/100" 44.Sh DESCRIPTION 45The 46.Nm 47device contains common timer, clock and eeprom routines for the 48.Nx 49kernel. 50.Pp 51All system use the timer interrupt to drive the hard clock. 52The second interrupt is used to drive statistics clock, except 53sun4/100 and sun4/200 machines, which don't have a spare timer 54device. 55.Sh HARDWARE 56The 57.Nm 58driver provides support for the following chips: 59.Pp 60.Bl -tag -width Dv -offset indent -compact 61.It Tn Dallas DS1287A 62.It Tn Intersil 7170 63.It Tn Mostek Mk48T02 64.It Tn Mostek Mk48T08 65.El 66.Sh SEE ALSO 67.Xr sparc/timer 4 68.Sh HISTORY 69The 70.Nm 71appeared in 72.Nx 1.0 . 73