1cefd51ecSDoug Rabson.\" -*- nroff -*- 2cefd51ecSDoug Rabson.\" 3cefd51ecSDoug Rabson.\" Copyright (c) 1998 Doug Rabson 4cefd51ecSDoug Rabson.\" 5cefd51ecSDoug Rabson.\" All rights reserved. 6cefd51ecSDoug Rabson.\" 7cefd51ecSDoug Rabson.\" This program is free software. 8cefd51ecSDoug Rabson.\" 9cefd51ecSDoug Rabson.\" Redistribution and use in source and binary forms, with or without 10cefd51ecSDoug Rabson.\" modification, are permitted provided that the following conditions 11cefd51ecSDoug Rabson.\" are met: 12cefd51ecSDoug Rabson.\" 1. Redistributions of source code must retain the above copyright 13cefd51ecSDoug Rabson.\" notice, this list of conditions and the following disclaimer. 14cefd51ecSDoug Rabson.\" 2. Redistributions in binary form must reproduce the above copyright 15cefd51ecSDoug Rabson.\" notice, this list of conditions and the following disclaimer in the 16cefd51ecSDoug Rabson.\" documentation and/or other materials provided with the distribution. 17cefd51ecSDoug Rabson.\" 18cefd51ecSDoug Rabson.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19cefd51ecSDoug Rabson.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20cefd51ecSDoug Rabson.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21cefd51ecSDoug Rabson.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22cefd51ecSDoug Rabson.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23cefd51ecSDoug Rabson.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24cefd51ecSDoug Rabson.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25cefd51ecSDoug Rabson.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26cefd51ecSDoug Rabson.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27cefd51ecSDoug Rabson.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28cefd51ecSDoug Rabson.\" 29cefd51ecSDoug Rabson.Dd June 16, 1998 30cefd51ecSDoug Rabson.Dt BUS_READ_IVAR 9 313d45e180SRuslan Ermilov.Os 32cefd51ecSDoug Rabson.Sh NAME 33cefd51ecSDoug Rabson.Nm BUS_READ_IVAR , 34cefd51ecSDoug Rabson.Nm BUS_WRITE_IVAR 35cefd51ecSDoug Rabson.Nd manipulate bus-specific device instance variables 36cefd51ecSDoug Rabson.Sh SYNOPSIS 3732eef9aeSRuslan Ermilov.In sys/param.h 3832eef9aeSRuslan Ermilov.In sys/bus.h 39cefd51ecSDoug Rabson.Ft int 40522e56cfSBruce Evans.Fn BUS_READ_IVAR "device_t dev" "device_t child" "int index" "uintptr_t *result" 41cefd51ecSDoug Rabson.Ft int 42522e56cfSBruce Evans.Fn BUS_WRITE_IVAR "device_t dev" "device_t child" "int index" "uintptr_t value" 43cefd51ecSDoug Rabson.Sh DESCRIPTION 44cefd51ecSDoug RabsonThese two methods manage a bus specific set of instance variables of 45cd367b32SHiten Pandyaa child device. 46cd367b32SHiten PandyaThe intention is that each different type of bus 47cefd51ecSDoug Rabsondefines a set of appropriate instance variables (such as ports and 48cefd51ecSDoug Rabsonirqs for ISA bus etc.) 49cefd51ecSDoug Rabson.Pp 50cefd51ecSDoug RabsonThis information could be given to the child device as a struct but 51cefd51ecSDoug Rabsonthat makes it hard for a bus to add or remove variables without 52cefd51ecSDoug Rabsonforcing an edit and recompile for all drivers which may not be 53cefd51ecSDoug Rabsonpossible for vendor supplied binary drivers. 54cefd51ecSDoug Rabson.Sh RETURN VALUES 55cefd51ecSDoug RabsonZero is returned on success, otherwise an appropriate error is returned. 56cefd51ecSDoug Rabson.Sh SEE ALSO 57cefd51ecSDoug Rabson.Xr device 9 , 58cefd51ecSDoug Rabson.Xr driver 9 59cefd51ecSDoug Rabson.Sh AUTHORS 6009356c84SHiten PandyaThis manual page was written by 61cefd51ecSDoug Rabson.An Doug Rabson . 62