root / lab4 / .minix-src / include / sys / wdog.h @ 14
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| 1 | 13 | up20180614 | /* $NetBSD: wdog.h,v 1.3 2005/12/11 12:25:21 christos Exp $ */
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| 2 | |||
| 3 | /*-
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| 4 | * Copyright (c) 2000 Zembu Labs, Inc.
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| 5 | * All rights reserved.
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| 6 | *
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| 7 | * Author: Jason R. Thorpe <thorpej@zembu.com>
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| 8 | *
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| 9 | * Redistribution and use in source and binary forms, with or without
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| 10 | * modification, are permitted provided that the following conditions
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| 11 | * are met:
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| 12 | * 1. Redistributions of source code must retain the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer.
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| 14 | * 2. Redistributions in binary form must reproduce the above copyright
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| 15 | * notice, this list of conditions and the following disclaimer in the
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| 16 | * documentation and/or other materials provided with the distribution.
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| 17 | * 3. All advertising materials mentioning features or use of this software
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| 18 | * must display the following acknowledgement:
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| 19 | * This product includes software developed by Zembu Labs, Inc.
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| 20 | * 4. Neither the name of Zembu Labs nor the names of its employees may
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| 21 | * be used to endorse or promote products derived from this software
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| 22 | * without specific prior written permission.
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| 23 | *
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| 24 | * THIS SOFTWARE IS PROVIDED BY ZEMBU LABS, INC. ``AS IS'' AND ANY EXPRESS
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| 25 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR-
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| 26 | * RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DIS-
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| 27 | * CLAIMED. IN NO EVENT SHALL ZEMBU LABS BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 28 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 29 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 30 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 31 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 32 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 33 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 34 | */
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| 35 | |||
| 36 | #ifndef _SYS_WDOG_H_
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| 37 | #define _SYS_WDOG_H_
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| 38 | |||
| 39 | #include <sys/ioccom.h> |
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| 40 | |||
| 41 | /*
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| 42 | * Definitions for manipulating watchdog timers.
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| 43 | */
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| 44 | |||
| 45 | /* This must match struct device's "dv_xname" size. */
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| 46 | #define WDOG_NAMESIZE 16 |
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| 47 | |||
| 48 | struct wdog_mode {
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| 49 | char wm_name[WDOG_NAMESIZE];
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| 50 | int wm_mode; /* timer mode */ |
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| 51 | u_int wm_period; /* timer period (seconds) */
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| 52 | }; |
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| 53 | |||
| 54 | /*
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| 55 | * GMODE -- get mode of watchdog specified by wm_name.
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| 56 | *
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| 57 | * SMODE -- set mode of watchdog specified by wm_mame. If
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| 58 | * wm_mode is not DISARMED, the watchdog is armed,
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| 59 | * if another watchdog is not already running.
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| 60 | */
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| 61 | #define WDOGIOC_GMODE _IOWR('w', 0, struct wdog_mode) |
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| 62 | #define WDOGIOC_SMODE _IOW('w', 1, struct wdog_mode) |
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| 63 | |||
| 64 | /*
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| 65 | * WHICH -- returns the mode information of the currently armed
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| 66 | * watchdog timer.
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| 67 | */
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| 68 | #define WDOGIOC_WHICH _IOR('w', 2, struct wdog_mode) |
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| 69 | |||
| 70 | /*
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| 71 | * TICKLE -- tickle the currently armed watchdog timer if the
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| 72 | * mode of that timer is UTICKLE.
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| 73 | */
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| 74 | #define WDOGIOC_TICKLE _IO('w', 3) |
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| 75 | |||
| 76 | /*
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| 77 | * GTICKLER -- get the PID of the last process to tickle the timer.
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| 78 | */
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| 79 | #define WDOGIOC_GTICKLER _IOR('w', 4, pid_t) |
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| 80 | |||
| 81 | /*
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| 82 | * GWDOGS -- fill in the character array with the names of all of
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| 83 | * the watchdog timers present on the system. The names
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| 84 | * will be padded out to WDOG_NAMESIZE. Thus, the argument
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| 85 | * should be (count * WDOG_NAMESIZE) bytes long.
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| 86 | */
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| 87 | struct wdog_conf {
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| 88 | char *wc_names;
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| 89 | int wc_count;
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| 90 | }; |
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| 91 | #define WDOGIOC_GWDOGS _IOWR('w', 5, struct wdog_conf) |
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| 92 | |||
| 93 | #define WDOG_MODE_DISARMED 0 /* watchdog is disarmed */ |
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| 94 | #define WDOG_MODE_KTICKLE 1 /* kernel tickles watchdog */ |
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| 95 | #define WDOG_MODE_UTICKLE 2 /* user tickles watchdog */ |
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| 96 | #define WDOG_MODE_ETICKLE 3 /* external program tickles watchdog */ |
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| 97 | |||
| 98 | #define WDOG_MODE_MASK 0x03 |
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| 99 | |||
| 100 | #define WDOG_FEATURE_ALARM 0x10 /* enable audible alarm on expire */ |
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| 101 | |||
| 102 | #define WDOG_FEATURE_MASK 0x10 |
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| 103 | |||
| 104 | #define WDOG_PERIOD_DEFAULT ((u_int)-1) |
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| 105 | |||
| 106 | /* Period is expressed in seconds. */
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| 107 | #define WDOG_PERIOD_TO_TICKS(period) ((period) * hz)
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| 108 | |||
| 109 | #endif /* _SYS_WDOG_H_ */ |