1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)subr_autoconf.c 8.1 (Berkeley) 6/10/93
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
/*
* Autoconfiguration subroutines.
*/
/*
* "Interrupt driven config" functions.
*/
static TAILQ_HEAD(, intr_config_hook) intr_config_hook_list =
TAILQ_HEAD_INITIALIZER(intr_config_hook_list);
/* ARGSUSED */
static void run_interrupt_driven_config_hooks(void *dummy);
static void
run_interrupt_driven_config_hooks(dummy)
void *dummy;
{
struct intr_config_hook *hook_entry, *next_entry;
for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
hook_entry != NULL;
hook_entry = next_entry) {
next_entry = TAILQ_NEXT(hook_entry, ich_links);
(*hook_entry->ich_func)(hook_entry->ich_arg);
}
while (!TAILQ_EMPTY(&intr_config_hook_list)) {
tsleep(&intr_config_hook_list, PCONFIG, "conifhk", 0);
}
}
SYSINIT(intr_config_hooks, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_FIRST,
run_interrupt_driven_config_hooks, NULL)
/*
* Register a hook that will be called after "cold"
* autoconfiguration is complete and interrupts can
* be used to complete initialization.
*/
int
config_intrhook_establish(hook)
struct intr_config_hook *hook;
{
struct intr_config_hook *hook_entry;
for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
hook_entry != NULL;
hook_entry = TAILQ_NEXT(hook_entry, ich_links))
if (hook_entry == hook)
break;
if (hook_entry != NULL) {
printf("config_intrhook_establish: establishing an "
"already established hook.\n");
return (1);
}
TAILQ_INSERT_TAIL(&intr_config_hook_list, hook, ich_links);
if (cold == 0)
/* XXX Sufficient for modules loaded after initial config??? */
run_interrupt_driven_config_hooks(NULL);
return (0);
}
void
config_intrhook_disestablish(hook)
struct intr_config_hook *hook;
{
struct intr_config_hook *hook_entry;
for (hook_entry = TAILQ_FIRST(&intr_config_hook_list);
hook_entry != NULL;
hook_entry = TAILQ_NEXT(hook_entry, ich_links))
if (hook_entry == hook)
break;
if (hook_entry == NULL)
panic("config_intrhook_disestablish: disestablishing an "
"unestablished hook");
TAILQ_REMOVE(&intr_config_hook_list, hook, ich_links);
/* Wakeup anyone watching the list */
wakeup(&intr_config_hook_list);
}
|
