77a6b82b27
This merge changes the device switch tables from static array to dynamically generated by config(8). - All device switches is defined as a constant structure in device drivers. - The new grammer ``device-major'' is introduced to ``files''. device-major <prefix> char <num> [block <num>] [<rules>] - All device major numbers must be listed up in port dependent majors.<arch> by using this grammer. - Added the new naming convention. The name of the device switch must be <prefix>_[bc]devsw for auto-generation of device switch tables. - The backward compatibility of loading block/character device switch by LKM framework is broken. This is necessary to convert from block/character device major to device name in runtime and vice versa. - The restriction to assign device major by LKM is completely removed. We don't need to reserve LKM entries for dynamic loading of device switch. - In compile time, device major numbers list is packed into the kernel and the LKM framework will refer it to assign device major number dynamically.
149 lines
3.8 KiB
C
149 lines
3.8 KiB
C
/* $NetBSD: sysmon.c,v 1.6 2002/09/06 13:18:43 gehenna Exp $ */
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/*-
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* Copyright (c) 2000 Zembu Labs, Inc.
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* All rights reserved.
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*
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* Author: Jason R. Thorpe <thorpej@zembu.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Zembu Labs, Inc.
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* 4. Neither the name of Zembu Labs nor the names of its employees may
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* be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ZEMBU LABS, INC. ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR-
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* RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DIS-
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* CLAIMED. IN NO EVENT SHALL ZEMBU LABS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Clearing house for system monitoring hardware. We currently
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* handle environmental sensors and watchdog timers.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: sysmon.c,v 1.6 2002/09/06 13:18:43 gehenna Exp $");
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/errno.h>
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#include <sys/fcntl.h>
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#include <sys/lock.h>
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#include <sys/callout.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <dev/sysmon/sysmonvar.h>
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#include <dev/sysmon/sysmonconf.h>
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dev_type_open(sysmonopen);
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dev_type_close(sysmonclose);
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dev_type_ioctl(sysmonioctl);
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const struct cdevsw sysmon_cdevsw = {
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sysmonopen, sysmonclose, noread, nowrite, sysmonioctl,
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nostop, notty, nopoll, nommap,
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};
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/*
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* sysmonopen:
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*
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* Open the system monitor device.
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*/
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int
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sysmonopen(dev_t dev, int flag, int mode, struct proc *p)
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{
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int error;
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switch (minor(dev)) {
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#if NSYSMON_ENVSYS > 0
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case SYSMON_MINOR_ENVSYS:
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error = sysmonopen_envsys(dev, flag, mode, p);
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break;
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#endif
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#if NSYSMON_WDOG > 0
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case SYSMON_MINOR_WDOG:
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error = sysmonopen_wdog(dev, flag, mode, p);
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break;
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#endif
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default:
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error = ENODEV;
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}
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return (error);
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}
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/*
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* sysmonclose:
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*
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* Close the system monitor device.
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*/
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int
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sysmonclose(dev_t dev, int flag, int mode, struct proc *p)
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{
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int error;
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switch (minor(dev)) {
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#if NSYSMON_ENVSYS > 0
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case SYSMON_MINOR_ENVSYS:
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error = sysmonclose_envsys(dev, flag, mode, p);
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break;
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#endif
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#if NSYSMON_WDOG > 0
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case SYSMON_MINOR_WDOG:
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error = sysmonclose_wdog(dev, flag, mode, p);
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break;
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#endif
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default:
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error = ENODEV;
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}
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return (error);
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}
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/*
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* sysmonioctl:
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*
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* Perform a control request.
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*/
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int
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sysmonioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
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{
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int error;
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switch (minor(dev)) {
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#if NSYSMON_ENVSYS > 0
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case SYSMON_MINOR_ENVSYS:
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error = sysmonioctl_envsys(dev, cmd, data, flag, p);
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break;
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#endif
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#if NSYSMON_WDOG > 0
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case SYSMON_MINOR_WDOG:
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error = sysmonioctl_wdog(dev, cmd, data, flag, p);
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break;
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#endif
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default:
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error = ENODEV;
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}
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return (error);
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}
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