1*1f60b395Sdholland /* $NetBSD: wdog.h,v 1.6 2016/01/26 06:27:38 dholland Exp $ */ 2cb5b106fSthorpej 3cb5b106fSthorpej /*- 4cb5b106fSthorpej * Copyright (c) 2000 Zembu Labs, Inc. 5cb5b106fSthorpej * All rights reserved. 6cb5b106fSthorpej * 7cb5b106fSthorpej * Author: Jason R. Thorpe <thorpej@zembu.com> 8cb5b106fSthorpej * 9cb5b106fSthorpej * Redistribution and use in source and binary forms, with or without 10cb5b106fSthorpej * modification, are permitted provided that the following conditions 11cb5b106fSthorpej * are met: 12cb5b106fSthorpej * 1. Redistributions of source code must retain the above copyright 13cb5b106fSthorpej * notice, this list of conditions and the following disclaimer. 14cb5b106fSthorpej * 2. Redistributions in binary form must reproduce the above copyright 15cb5b106fSthorpej * notice, this list of conditions and the following disclaimer in the 16cb5b106fSthorpej * documentation and/or other materials provided with the distribution. 17cb5b106fSthorpej * 3. All advertising materials mentioning features or use of this software 18cb5b106fSthorpej * must display the following acknowledgement: 19cb5b106fSthorpej * This product includes software developed by Zembu Labs, Inc. 20cb5b106fSthorpej * 4. Neither the name of Zembu Labs nor the names of its employees may 21cb5b106fSthorpej * be used to endorse or promote products derived from this software 22cb5b106fSthorpej * without specific prior written permission. 23cb5b106fSthorpej * 24cb5b106fSthorpej * THIS SOFTWARE IS PROVIDED BY ZEMBU LABS, INC. ``AS IS'' AND ANY EXPRESS 25cb5b106fSthorpej * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR- 26cb5b106fSthorpej * RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DIS- 27cb5b106fSthorpej * CLAIMED. IN NO EVENT SHALL ZEMBU LABS BE LIABLE FOR ANY DIRECT, INDIRECT, 28cb5b106fSthorpej * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29cb5b106fSthorpej * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30cb5b106fSthorpej * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31cb5b106fSthorpej * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32cb5b106fSthorpej * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33cb5b106fSthorpej * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34cb5b106fSthorpej */ 35cb5b106fSthorpej 36cb5b106fSthorpej #ifndef _SYS_WDOG_H_ 37cb5b106fSthorpej #define _SYS_WDOG_H_ 38cb5b106fSthorpej 39cb5b106fSthorpej #include <sys/ioccom.h> 40cb5b106fSthorpej 41cb5b106fSthorpej /* 42cb5b106fSthorpej * Definitions for manipulating watchdog timers. 43cb5b106fSthorpej */ 44cb5b106fSthorpej 45cb5b106fSthorpej /* This must match struct device's "dv_xname" size. */ 46cb5b106fSthorpej #define WDOG_NAMESIZE 16 47cb5b106fSthorpej 48cb5b106fSthorpej struct wdog_mode { 49cb5b106fSthorpej char wm_name[WDOG_NAMESIZE]; 50cb5b106fSthorpej int wm_mode; /* timer mode */ 512a9a9741Sdholland unsigned int wm_period; /* timer period (seconds) */ 52cb5b106fSthorpej }; 53cb5b106fSthorpej 54cb5b106fSthorpej /* 55cb5b106fSthorpej * GMODE -- get mode of watchdog specified by wm_name. 56cb5b106fSthorpej * 57*1f60b395Sdholland * SMODE -- set mode of watchdog specified by wm_name. If 58cb5b106fSthorpej * wm_mode is not DISARMED, the watchdog is armed, 59cb5b106fSthorpej * if another watchdog is not already running. 60cb5b106fSthorpej */ 61cb5b106fSthorpej #define WDOGIOC_GMODE _IOWR('w', 0, struct wdog_mode) 62cb5b106fSthorpej #define WDOGIOC_SMODE _IOW('w', 1, struct wdog_mode) 63cb5b106fSthorpej 64cb5b106fSthorpej /* 65cb5b106fSthorpej * WHICH -- returns the mode information of the currently armed 66cb5b106fSthorpej * watchdog timer. 67cb5b106fSthorpej */ 68cb5b106fSthorpej #define WDOGIOC_WHICH _IOR('w', 2, struct wdog_mode) 69cb5b106fSthorpej 70cb5b106fSthorpej /* 71cb5b106fSthorpej * TICKLE -- tickle the currently armed watchdog timer if the 72cb5b106fSthorpej * mode of that timer is UTICKLE. 73cb5b106fSthorpej */ 74cb5b106fSthorpej #define WDOGIOC_TICKLE _IO('w', 3) 75cb5b106fSthorpej 76cb5b106fSthorpej /* 77cb5b106fSthorpej * GTICKLER -- get the PID of the last process to tickle the timer. 78cb5b106fSthorpej */ 79cb5b106fSthorpej #define WDOGIOC_GTICKLER _IOR('w', 4, pid_t) 80cb5b106fSthorpej 81cb5b106fSthorpej /* 82cb5b106fSthorpej * GWDOGS -- fill in the character array with the names of all of 83cb5b106fSthorpej * the watchdog timers present on the system. The names 84cb5b106fSthorpej * will be padded out to WDOG_NAMESIZE. Thus, the argument 85cb5b106fSthorpej * should be (count * WDOG_NAMESIZE) bytes long. 86cb5b106fSthorpej */ 87cb5b106fSthorpej struct wdog_conf { 88cb5b106fSthorpej char *wc_names; 89cb5b106fSthorpej int wc_count; 90cb5b106fSthorpej }; 91cb5b106fSthorpej #define WDOGIOC_GWDOGS _IOWR('w', 5, struct wdog_conf) 92cb5b106fSthorpej 93cb5b106fSthorpej #define WDOG_MODE_DISARMED 0 /* watchdog is disarmed */ 94cb5b106fSthorpej #define WDOG_MODE_KTICKLE 1 /* kernel tickles watchdog */ 95cb5b106fSthorpej #define WDOG_MODE_UTICKLE 2 /* user tickles watchdog */ 96ddd2ade2Ssmb #define WDOG_MODE_ETICKLE 3 /* external program tickles watchdog */ 97cb5b106fSthorpej 98cb5b106fSthorpej #define WDOG_MODE_MASK 0x03 99cb5b106fSthorpej 100cb5b106fSthorpej #define WDOG_FEATURE_ALARM 0x10 /* enable audible alarm on expire */ 101cb5b106fSthorpej 102cb5b106fSthorpej #define WDOG_FEATURE_MASK 0x10 103cb5b106fSthorpej 104cb5b106fSthorpej #define WDOG_PERIOD_DEFAULT ((u_int)-1) 105cb5b106fSthorpej 106cb5b106fSthorpej /* Period is expressed in seconds. */ 107cb5b106fSthorpej #define WDOG_PERIOD_TO_TICKS(period) ((period) * hz) 108cb5b106fSthorpej 109cb5b106fSthorpej #endif /* _SYS_WDOG_H_ */ 110