LCOM1920-T02G10

/*        $NetBSD: wdog.h,v 1.3 2005/12/11 12:25:21 christos Exp $        */

/*-

 * Copyright (c) 2000 Zembu Labs, Inc.

 * All rights reserved.

 *

 * Author: Jason R. Thorpe <thorpej@zembu.com>

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *        This product includes software developed by Zembu Labs, Inc.

 * 4. Neither the name of Zembu Labs nor the names of its employees may

 *    be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY ZEMBU LABS, INC. ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR-

 * RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DIS-

 * CLAIMED.  IN NO EVENT SHALL ZEMBU LABS BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef _SYS_WDOG_H_

#define        _SYS_WDOG_H_

#include <sys/ioccom.h>

/*

 * Definitions for manipulating watchdog timers.

 */

/* This must match struct device's "dv_xname" size. */

#define        WDOG_NAMESIZE        16

struct wdog_mode {

        char wm_name[WDOG_NAMESIZE];

        int wm_mode;                /* timer mode */

        u_int wm_period;        /* timer period (seconds) */

};

/*

 * GMODE -- get mode of watchdog specified by wm_name.

 *

 * SMODE -- set mode of watchdog specified by wm_mame.  If

 *          wm_mode is not DISARMED, the watchdog is armed,

 *          if another watchdog is not already running.

 */

#define        WDOGIOC_GMODE                _IOWR('w', 0, struct wdog_mode)

#define        WDOGIOC_SMODE                 _IOW('w', 1, struct wdog_mode)

/*

 * WHICH -- returns the mode information of the currently armed

 *          watchdog timer.

 */

#define        WDOGIOC_WHICH                 _IOR('w', 2, struct wdog_mode)

/*

 * TICKLE -- tickle the currently armed watchdog timer if the

 *           mode of that timer is UTICKLE.

 */

#define        WDOGIOC_TICKLE                  _IO('w', 3)

/*

 * GTICKLER -- get the PID of the last process to tickle the timer.

 */

#define        WDOGIOC_GTICKLER         _IOR('w', 4, pid_t)

/*

 * GWDOGS -- fill in the character array with the names of all of

 *           the watchdog timers present on the system.  The names

 *           will be padded out to WDOG_NAMESIZE.  Thus, the argument

 *           should be (count * WDOG_NAMESIZE) bytes long.

 */

struct wdog_conf {

        char *wc_names;

        int wc_count;

};

#define        WDOGIOC_GWDOGS                _IOWR('w', 5, struct wdog_conf)

#define        WDOG_MODE_DISARMED        0        /* watchdog is disarmed */

#define        WDOG_MODE_KTICKLE        1        /* kernel tickles watchdog */

#define        WDOG_MODE_UTICKLE        2        /* user tickles watchdog */

#define        WDOG_MODE_ETICKLE        3        /* external program tickles watchdog */

#define        WDOG_MODE_MASK                0x03

#define        WDOG_FEATURE_ALARM        0x10        /* enable audible alarm on expire */

#define        WDOG_FEATURE_MASK        0x10

#define        WDOG_PERIOD_DEFAULT        ((u_int)-1)

/* Period is expressed in seconds. */

#define        WDOG_PERIOD_TO_TICKS(period)        ((period) * hz)

#endif /* _SYS_WDOG_H_ */