1 /* $NetBSD: wdog.h,v 1.1 2000/11/04 18:33:33 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 Zembu Labs, Inc. 5 * All rights reserved. 6 * 7 * Author: Jason R. Thorpe <thorpej@zembu.com> 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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Zembu Labs, Inc. 20 * 4. Neither the name of Zembu Labs nor the names of its employees may 21 * be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY ZEMBU LABS, INC. ``AS IS'' AND ANY EXPRESS 25 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR- 26 * RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DIS- 27 * CLAIMED. IN NO EVENT SHALL ZEMBU LABS BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #ifndef _SYS_WDOG_H_ 37 #define _SYS_WDOG_H_ 38 39 #include <sys/ioccom.h> 40 41 /* 42 * Definitions for manipulating watchdog timers. 43 */ 44 45 /* This must match struct device's "dv_xname" size. */ 46 #define WDOG_NAMESIZE 16 47 48 struct wdog_mode { 49 char wm_name[WDOG_NAMESIZE]; 50 int wm_mode; /* timer mode */ 51 u_int wm_period; /* timer period (seconds) */ 52 }; 53 54 /* 55 * GMODE -- get mode of watchdog specified by wm_name. 56 * 57 * SMODE -- set mode of watchdog specified by wm_mame. If 58 * wm_mode is not DISARMED, the watchdog is armed, 59 * if another watchdog is not already running. 60 */ 61 #define WDOGIOC_GMODE _IOWR('w', 0, struct wdog_mode) 62 #define WDOGIOC_SMODE _IOW('w', 1, struct wdog_mode) 63 64 /* 65 * WHICH -- returns the mode information of the currently armed 66 * watchdog timer. 67 */ 68 #define WDOGIOC_WHICH _IOR('w', 2, struct wdog_mode) 69 70 /* 71 * TICKLE -- tickle the currently armed watchdog timer if the 72 * mode of that timer is UTICKLE. 73 */ 74 #define WDOGIOC_TICKLE _IO('w', 3) 75 76 /* 77 * GTICKLER -- get the PID of the last process to tickle the timer. 78 */ 79 #define WDOGIOC_GTICKLER _IOR('w', 4, pid_t) 80 81 /* 82 * GWDOGS -- fill in the character array with the names of all of 83 * the watchdog timers present on the system. The names 84 * will be padded out to WDOG_NAMESIZE. Thus, the argument 85 * should be (count * WDOG_NAMESIZE) bytes long. 86 */ 87 struct wdog_conf { 88 char *wc_names; 89 int wc_count; 90 }; 91 #define WDOGIOC_GWDOGS _IOWR('w', 5, struct wdog_conf) 92 93 #define WDOG_MODE_DISARMED 0 /* watchdog is disarmed */ 94 #define WDOG_MODE_KTICKLE 1 /* kernel tickles watchdog */ 95 #define WDOG_MODE_UTICKLE 2 /* user tickles watchdog */ 96 97 #define WDOG_MODE_MASK 0x03 98 99 #define WDOG_FEATURE_ALARM 0x10 /* enable audible alarm on expire */ 100 101 #define WDOG_FEATURE_MASK 0x10 102 103 #define WDOG_PERIOD_DEFAULT ((u_int)-1) 104 105 /* Period is expressed in seconds. */ 106 #define WDOG_PERIOD_TO_TICKS(period) ((period) * hz) 107 108 #endif /* _SYS_WDOG_H_ */ 109