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 * All advertising materials mentioning features or use of this software
10 * must display the following acknowledgement:
11 * This product includes software developed by the University of
12 * California, Lawrence Berkeley Laboratories.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. All advertising materials mentioning features or use of this software
23 * must display the following acknowledgement:
24 * This product includes software developed by the University of
25 * California, Berkeley and its contributors.
26 * 4. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * @(#)subr_autoconf.c 8.1 (Berkeley) 6/10/93
44 * $FreeBSD: src/sys/kern/subr_autoconf.c,v 1.14 1999/10/05 21:19:41 n_hibma Exp $
45 * $DragonFly: src/sys/kern/subr_autoconf.c,v 1.8 2006/12/23 00:35:04 swildner Exp $
48 #include <sys/param.h>
49 #include <sys/kernel.h>
50 #include <sys/systm.h>
51 #include <sys/thread.h>
52 #include <sys/thread2.h>
55 * Autoconfiguration subroutines.
59 * "Interrupt driven config" functions.
61 static TAILQ_HEAD(, intr_config_hook) intr_config_hook_list =
62 TAILQ_HEAD_INITIALIZER(intr_config_hook_list);
66 static void run_interrupt_driven_config_hooks (void *dummy);
69 run_interrupt_driven_config_hooks(void *dummy)
71 struct intr_config_hook *hook_entry, *next_entry;
74 for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
76 hook_entry = next_entry) {
77 next_entry = TAILQ_NEXT(hook_entry, ich_links);
78 (*hook_entry->ich_func)(hook_entry->ich_arg);
82 while (!TAILQ_EMPTY(&intr_config_hook_list)) {
85 kprintf("**WARNING** waiting for the following device to finish configuring:\n");
86 TAILQ_FOREACH(hook_entry, &intr_config_hook_list, ich_links) {
87 kprintf(" %s:\tfunc=%p arg=%p\n",
88 (hook_entry->ich_desc ?
89 hook_entry->ich_desc : "?"),
95 kprintf("Giving up, interrupt routing is probably hosed\n");
99 tsleep(&intr_config_hook_list, 0, "conifhk", hz * 10);
103 SYSINIT(intr_config_hooks, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_FIRST,
104 run_interrupt_driven_config_hooks, NULL)
107 * Register a hook that will be called after "cold"
108 * autoconfiguration is complete and interrupts can
109 * be used to complete initialization.
112 config_intrhook_establish(struct intr_config_hook *hook)
114 struct intr_config_hook *hook_entry;
116 for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
118 hook_entry = TAILQ_NEXT(hook_entry, ich_links))
119 if (hook_entry == hook)
121 if (hook_entry != NULL) {
122 kprintf("config_intrhook_establish: establishing an "
123 "already established hook.\n");
126 TAILQ_INSERT_TAIL(&intr_config_hook_list, hook, ich_links);
128 /* XXX Sufficient for modules loaded after initial config??? */
129 run_interrupt_driven_config_hooks(NULL);
134 config_intrhook_disestablish(struct intr_config_hook *hook)
136 struct intr_config_hook *hook_entry;
138 for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
140 hook_entry = TAILQ_NEXT(hook_entry, ich_links))
141 if (hook_entry == hook)
143 if (hook_entry == NULL)
144 panic("config_intrhook_disestablish: disestablishing an "
145 "unestablished hook");
147 TAILQ_REMOVE(&intr_config_hook_list, hook, ich_links);
148 /* Wakeup anyone watching the list */
149 wakeup(&intr_config_hook_list);