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
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32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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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 1.4 2003/08/26 21:09:02 rob Exp $
48 #include <sys/param.h>
49 #include <sys/kernel.h>
50 #include <sys/systm.h>
53 * Autoconfiguration subroutines.
57 * "Interrupt driven config" functions.
59 static TAILQ_HEAD(, intr_config_hook) intr_config_hook_list =
60 TAILQ_HEAD_INITIALIZER(intr_config_hook_list);
64 static void run_interrupt_driven_config_hooks (void *dummy);
66 run_interrupt_driven_config_hooks(dummy)
69 struct intr_config_hook *hook_entry, *next_entry;
71 for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
73 hook_entry = next_entry) {
74 next_entry = TAILQ_NEXT(hook_entry, ich_links);
75 (*hook_entry->ich_func)(hook_entry->ich_arg);
78 while (!TAILQ_EMPTY(&intr_config_hook_list)) {
79 tsleep(&intr_config_hook_list, 0, "conifhk", 0);
82 SYSINIT(intr_config_hooks, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_FIRST,
83 run_interrupt_driven_config_hooks, NULL)
86 * Register a hook that will be called after "cold"
87 * autoconfiguration is complete and interrupts can
88 * be used to complete initialization.
91 config_intrhook_establish(hook)
92 struct intr_config_hook *hook;
94 struct intr_config_hook *hook_entry;
96 for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
98 hook_entry = TAILQ_NEXT(hook_entry, ich_links))
99 if (hook_entry == hook)
101 if (hook_entry != NULL) {
102 printf("config_intrhook_establish: establishing an "
103 "already established hook.\n");
106 TAILQ_INSERT_TAIL(&intr_config_hook_list, hook, ich_links);
108 /* XXX Sufficient for modules loaded after initial config??? */
109 run_interrupt_driven_config_hooks(NULL);
114 config_intrhook_disestablish(hook)
115 struct intr_config_hook *hook;
117 struct intr_config_hook *hook_entry;
119 for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
121 hook_entry = TAILQ_NEXT(hook_entry, ich_links))
122 if (hook_entry == hook)
124 if (hook_entry == NULL)
125 panic("config_intrhook_disestablish: disestablishing an "
126 "unestablished hook");
128 TAILQ_REMOVE(&intr_config_hook_list, hook, ich_links);
129 /* Wakeup anyone watching the list */
130 wakeup(&intr_config_hook_list);