237fdd787b
after each SYSINIT() macro invocation. This makes a number of lightweight C parsers much happier with the FreeBSD kernel source, including cflow's prcc and lxr. MFC after: 1 month Discussed with: imp, rink
133 lines
4.3 KiB
C
133 lines
4.3 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)subr_autoconf.c 8.1 (Berkeley) 6/10/93
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/systm.h>
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/*
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* Autoconfiguration subroutines.
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*/
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/*
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* "Interrupt driven config" functions.
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*/
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static TAILQ_HEAD(, intr_config_hook) intr_config_hook_list =
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TAILQ_HEAD_INITIALIZER(intr_config_hook_list);
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static struct mtx intr_config_hook_lock;
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MTX_SYSINIT(intr_config_hook, &intr_config_hook_lock, "intr config", MTX_DEF);
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/* ARGSUSED */
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static void run_interrupt_driven_config_hooks(void *dummy);
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static void
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run_interrupt_driven_config_hooks(dummy)
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void *dummy;
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{
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struct intr_config_hook *hook_entry, *next_entry;
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mtx_lock(&intr_config_hook_lock);
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TAILQ_FOREACH_SAFE(hook_entry, &intr_config_hook_list, ich_links,
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next_entry) {
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mtx_unlock(&intr_config_hook_lock);
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(*hook_entry->ich_func)(hook_entry->ich_arg);
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mtx_lock(&intr_config_hook_lock);
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}
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while (!TAILQ_EMPTY(&intr_config_hook_list)) {
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msleep(&intr_config_hook_list, &intr_config_hook_lock, PCONFIG,
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"conifhk", 0);
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}
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mtx_unlock(&intr_config_hook_lock);
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}
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SYSINIT(intr_config_hooks, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_FIRST,
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run_interrupt_driven_config_hooks, NULL);
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/*
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* Register a hook that will be called after "cold"
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* autoconfiguration is complete and interrupts can
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* be used to complete initialization.
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*/
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int
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config_intrhook_establish(hook)
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struct intr_config_hook *hook;
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{
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struct intr_config_hook *hook_entry;
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mtx_lock(&intr_config_hook_lock);
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TAILQ_FOREACH(hook_entry, &intr_config_hook_list, ich_links)
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if (hook_entry == hook)
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break;
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if (hook_entry != NULL) {
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mtx_unlock(&intr_config_hook_lock);
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printf("config_intrhook_establish: establishing an "
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"already established hook.\n");
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return (1);
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}
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TAILQ_INSERT_TAIL(&intr_config_hook_list, hook, ich_links);
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mtx_unlock(&intr_config_hook_lock);
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if (cold == 0)
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/* XXX Sufficient for modules loaded after initial config??? */
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run_interrupt_driven_config_hooks(NULL);
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return (0);
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}
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void
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config_intrhook_disestablish(hook)
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struct intr_config_hook *hook;
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{
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struct intr_config_hook *hook_entry;
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mtx_lock(&intr_config_hook_lock);
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TAILQ_FOREACH(hook_entry, &intr_config_hook_list, ich_links)
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if (hook_entry == hook)
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break;
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if (hook_entry == NULL)
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panic("config_intrhook_disestablish: disestablishing an "
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"unestablished hook");
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TAILQ_REMOVE(&intr_config_hook_list, hook, ich_links);
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/* Wakeup anyone watching the list */
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wakeup(&intr_config_hook_list);
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mtx_unlock(&intr_config_hook_lock);
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}
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