mirror of
https://github.com/freebsd/freebsd-src
synced 2024-11-05 18:22:52 +00:00
123 lines
4 KiB
C
123 lines
4 KiB
C
/*-
|
|
* 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);
|
|
}
|