2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This software was developed by the Computer Systems Engineering group
6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
7 * contributed to Berkeley.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)subr_autoconf.c 8.1 (Berkeley) 6/10/93
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include <sys/param.h>
41 #include <sys/kernel.h>
42 #include <sys/systm.h>
45 * Autoconfiguration subroutines.
49 * "Interrupt driven config" functions.
51 static TAILQ_HEAD(, intr_config_hook) intr_config_hook_list =
52 TAILQ_HEAD_INITIALIZER(intr_config_hook_list);
56 static void run_interrupt_driven_config_hooks(void *dummy);
58 run_interrupt_driven_config_hooks(dummy)
61 struct intr_config_hook *hook_entry, *next_entry;
63 for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
65 hook_entry = next_entry) {
66 next_entry = TAILQ_NEXT(hook_entry, ich_links);
67 (*hook_entry->ich_func)(hook_entry->ich_arg);
70 while (!TAILQ_EMPTY(&intr_config_hook_list)) {
71 tsleep(&intr_config_hook_list, PCONFIG, "conifhk", 0);
74 SYSINIT(intr_config_hooks, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_FIRST,
75 run_interrupt_driven_config_hooks, NULL)
78 * Register a hook that will be called after "cold"
79 * autoconfiguration is complete and interrupts can
80 * be used to complete initialization.
83 config_intrhook_establish(hook)
84 struct intr_config_hook *hook;
86 struct intr_config_hook *hook_entry;
88 for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
90 hook_entry = TAILQ_NEXT(hook_entry, ich_links))
91 if (hook_entry == hook)
93 if (hook_entry != NULL) {
94 printf("config_intrhook_establish: establishing an "
95 "already established hook.\n");
98 TAILQ_INSERT_TAIL(&intr_config_hook_list, hook, ich_links);
100 /* XXX Sufficient for modules loaded after initial config??? */
101 run_interrupt_driven_config_hooks(NULL);
106 config_intrhook_disestablish(hook)
107 struct intr_config_hook *hook;
109 struct intr_config_hook *hook_entry;
111 for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
113 hook_entry = TAILQ_NEXT(hook_entry, ich_links))
114 if (hook_entry == hook)
116 if (hook_entry == NULL)
117 panic("config_intrhook_disestablish: disestablishing an "
118 "unestablished hook");
120 TAILQ_REMOVE(&intr_config_hook_list, hook, ich_links);
121 /* Wakeup anyone watching the list */
122 wakeup(&intr_config_hook_list);