__P() removal
[dragonfly.git] / sys / kern / subr_autoconf.c
1 /*
2  * Copyright (c) 1992, 1993
3  *      The Regents of the University of California.  All rights reserved.
4  *
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.
8  *
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.
13  *
14  * Redistribution and use in source and binary forms, with or without
15  * modification, are permitted provided that the following conditions
16  * are met:
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.
29  *
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
40  * SUCH DAMAGE.
41  *
42  *      @(#)subr_autoconf.c     8.1 (Berkeley) 6/10/93
43  *
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 $
46  */
47
48 #include <sys/param.h>
49 #include <sys/kernel.h>
50 #include <sys/systm.h>
51
52 /*
53  * Autoconfiguration subroutines.
54  */
55
56 /*
57  * "Interrupt driven config" functions.
58  */
59 static TAILQ_HEAD(, intr_config_hook) intr_config_hook_list =
60         TAILQ_HEAD_INITIALIZER(intr_config_hook_list);
61
62
63 /* ARGSUSED */
64 static void run_interrupt_driven_config_hooks (void *dummy);
65 static void
66 run_interrupt_driven_config_hooks(dummy)
67         void *dummy;
68 {
69         struct intr_config_hook *hook_entry, *next_entry;
70
71         for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
72              hook_entry != NULL;
73              hook_entry = next_entry) {
74                 next_entry = TAILQ_NEXT(hook_entry, ich_links);
75                 (*hook_entry->ich_func)(hook_entry->ich_arg);
76         }
77
78         while (!TAILQ_EMPTY(&intr_config_hook_list)) {
79                 tsleep(&intr_config_hook_list, 0, "conifhk", 0);
80         }
81 }
82 SYSINIT(intr_config_hooks, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_FIRST,
83         run_interrupt_driven_config_hooks, NULL)
84
85 /*
86  * Register a hook that will be called after "cold"
87  * autoconfiguration is complete and interrupts can
88  * be used to complete initialization.
89  */
90 int
91 config_intrhook_establish(hook)
92         struct intr_config_hook *hook;
93 {
94         struct intr_config_hook *hook_entry;
95
96         for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
97              hook_entry != NULL;
98              hook_entry = TAILQ_NEXT(hook_entry, ich_links))
99                 if (hook_entry == hook)
100                         break;
101         if (hook_entry != NULL) {
102                 printf("config_intrhook_establish: establishing an "
103                        "already established hook.\n");
104                 return (1);
105         }
106         TAILQ_INSERT_TAIL(&intr_config_hook_list, hook, ich_links);
107         if (cold == 0)
108                 /* XXX Sufficient for modules loaded after initial config??? */
109                 run_interrupt_driven_config_hooks(NULL);        
110         return (0);
111 }
112
113 void
114 config_intrhook_disestablish(hook)
115         struct intr_config_hook *hook;
116 {
117         struct intr_config_hook *hook_entry;
118
119         for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
120              hook_entry != NULL;
121              hook_entry = TAILQ_NEXT(hook_entry, ich_links))
122                 if (hook_entry == hook)
123                         break;
124         if (hook_entry == NULL)
125                 panic("config_intrhook_disestablish: disestablishing an "
126                       "unestablished hook");
127
128         TAILQ_REMOVE(&intr_config_hook_list, hook, ich_links);
129         /* Wakeup anyone watching the list */
130         wakeup(&intr_config_hook_list);
131 }