1 /*- 2 * Copyright (c) 2003 Poul-Henning Kamp 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 #ifndef _SYS_WATCHDOG_H 29 #define _SYS_WATCHDOG_H 30 31 #include <sys/ioccom.h> 32 33 #define _PATH_WATCHDOG "fido" 34 35 #define WDIOCPATPAT _IOW('W', 42, u_int) 36 37 #define WD_ACTIVE 0x8000000 38 /* 39 * Watchdog reset, timeout set to value in WD_INTERVAL field. 40 * The kernel will arm the watchdog and unless the userland 41 * program calls WDIOCPATPAT again before the timer expires 42 * the system will reinitialize. 43 */ 44 45 #define WD_PASSIVE 0x0400000 46 /* 47 * Set the watchdog in passive mode. 48 * The kernel will chose an appropriate timeout duration and 49 * periodically reset the timer provided everything looks all 50 * right to the kernel. 51 */ 52 53 #define WD_INTERVAL 0x00000ff 54 /* 55 * Mask for duration bits. 56 * The watchdog will have a nominal patience of 2^N * nanoseconds. 57 * Example: N == 30 gives a patience of 2^30 nanoseconds ~= 1 second. 58 * NB: Expect variance in the +/- 10-20% range. 59 */ 60 61 /* Handy macros for humans not used to power of two nanoseconds */ 62 #define WD_TO_NEVER 0 63 #define WD_TO_1MS 20 64 #define WD_TO_125MS 27 65 #define WD_TO_250MS 28 66 #define WD_TO_500MS 29 67 #define WD_TO_1SEC 30 68 #define WD_TO_2SEC 31 69 #define WD_TO_4SEC 32 70 #define WD_TO_8SEC 33 71 #define WD_TO_16SEC 34 72 #define WD_TO_32SEC 35 73 74 #ifdef _KERNEL 75 76 #include <sys/eventhandler.h> 77 78 typedef void (*watchdog_fn)(void *, u_int, int *); 79 80 EVENTHANDLER_DECLARE(watchdog_list, watchdog_fn); 81 #endif 82 83 #endif /* _SYS_WATCHDOG_H */ 84