subr_autoconf.c revision 116182
11541Srgrimes/* 21541Srgrimes * Copyright (c) 1992, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * This software was developed by the Computer Systems Engineering group 61541Srgrimes * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 71541Srgrimes * contributed to Berkeley. 81541Srgrimes * 91541Srgrimes * All advertising materials mentioning features or use of this software 101541Srgrimes * must display the following acknowledgement: 111541Srgrimes * This product includes software developed by the University of 121541Srgrimes * California, Lawrence Berkeley Laboratories. 131541Srgrimes * 141541Srgrimes * Redistribution and use in source and binary forms, with or without 151541Srgrimes * modification, are permitted provided that the following conditions 161541Srgrimes * are met: 171541Srgrimes * 1. Redistributions of source code must retain the above copyright 181541Srgrimes * notice, this list of conditions and the following disclaimer. 191541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 201541Srgrimes * notice, this list of conditions and the following disclaimer in the 211541Srgrimes * documentation and/or other materials provided with the distribution. 221541Srgrimes * 3. All advertising materials mentioning features or use of this software 231541Srgrimes * must display the following acknowledgement: 241541Srgrimes * This product includes software developed by the University of 251541Srgrimes * California, Berkeley and its contributors. 261541Srgrimes * 4. Neither the name of the University nor the names of its contributors 271541Srgrimes * may be used to endorse or promote products derived from this software 281541Srgrimes * without specific prior written permission. 291541Srgrimes * 301541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 311541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 321541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 331541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 341541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 351541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 361541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 371541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 381541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 391541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 401541Srgrimes * SUCH DAMAGE. 411541Srgrimes * 421541Srgrimes * @(#)subr_autoconf.c 8.1 (Berkeley) 6/10/93 431541Srgrimes * 441541Srgrimes */ 451541Srgrimes 46116182Sobrien#include <sys/cdefs.h> 47116182Sobrien__FBSDID("$FreeBSD: head/sys/kern/subr_autoconf.c 116182 2003-06-11 00:56:59Z obrien $"); 48116182Sobrien 491541Srgrimes#include <sys/param.h> 5029680Sgibbs#include <sys/kernel.h> 5129680Sgibbs#include <sys/systm.h> 521541Srgrimes 531541Srgrimes/* 541541Srgrimes * Autoconfiguration subroutines. 551541Srgrimes */ 561541Srgrimes 571541Srgrimes/* 5829680Sgibbs * "Interrupt driven config" functions. 5929680Sgibbs */ 6060938Sjakestatic TAILQ_HEAD(, intr_config_hook) intr_config_hook_list = 6129680Sgibbs TAILQ_HEAD_INITIALIZER(intr_config_hook_list); 6229680Sgibbs 6329680Sgibbs 6429680Sgibbs/* ARGSUSED */ 6592723Salfredstatic void run_interrupt_driven_config_hooks(void *dummy); 6629680Sgibbsstatic void 6729680Sgibbsrun_interrupt_driven_config_hooks(dummy) 6829680Sgibbs void *dummy; 6929680Sgibbs{ 7051684Sn_hibma struct intr_config_hook *hook_entry, *next_entry; 7129680Sgibbs 7251684Sn_hibma for (hook_entry = TAILQ_FIRST(&intr_config_hook_list); 7351684Sn_hibma hook_entry != NULL; 7451684Sn_hibma hook_entry = next_entry) { 7551684Sn_hibma next_entry = TAILQ_NEXT(hook_entry, ich_links); 7651684Sn_hibma (*hook_entry->ich_func)(hook_entry->ich_arg); 7729680Sgibbs } 7829680Sgibbs 7951684Sn_hibma while (!TAILQ_EMPTY(&intr_config_hook_list)) { 8029680Sgibbs tsleep(&intr_config_hook_list, PCONFIG, "conifhk", 0); 8129680Sgibbs } 8229680Sgibbs} 8329680SgibbsSYSINIT(intr_config_hooks, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_FIRST, 8429680Sgibbs run_interrupt_driven_config_hooks, NULL) 8529680Sgibbs 8629680Sgibbs/* 8729680Sgibbs * Register a hook that will be called after "cold" 8829680Sgibbs * autoconfiguration is complete and interrupts can 8929680Sgibbs * be used to complete initialization. 9029680Sgibbs */ 9129680Sgibbsint 9229680Sgibbsconfig_intrhook_establish(hook) 9329680Sgibbs struct intr_config_hook *hook; 9429680Sgibbs{ 9529680Sgibbs struct intr_config_hook *hook_entry; 9629680Sgibbs 9751684Sn_hibma for (hook_entry = TAILQ_FIRST(&intr_config_hook_list); 9851684Sn_hibma hook_entry != NULL; 9951684Sn_hibma hook_entry = TAILQ_NEXT(hook_entry, ich_links)) 10029680Sgibbs if (hook_entry == hook) 10129680Sgibbs break; 10229680Sgibbs if (hook_entry != NULL) { 10329680Sgibbs printf("config_intrhook_establish: establishing an " 10429680Sgibbs "already established hook.\n"); 10529680Sgibbs return (1); 10629680Sgibbs } 10729680Sgibbs TAILQ_INSERT_TAIL(&intr_config_hook_list, hook, ich_links); 10829680Sgibbs if (cold == 0) 10945739Speter /* XXX Sufficient for modules loaded after initial config??? */ 11029680Sgibbs run_interrupt_driven_config_hooks(NULL); 11129680Sgibbs return (0); 11229680Sgibbs} 11329680Sgibbs 11429680Sgibbsvoid 11529680Sgibbsconfig_intrhook_disestablish(hook) 11629680Sgibbs struct intr_config_hook *hook; 11729680Sgibbs{ 11829680Sgibbs struct intr_config_hook *hook_entry; 11929680Sgibbs 12051684Sn_hibma for (hook_entry = TAILQ_FIRST(&intr_config_hook_list); 12151684Sn_hibma hook_entry != NULL; 12251684Sn_hibma hook_entry = TAILQ_NEXT(hook_entry, ich_links)) 12329680Sgibbs if (hook_entry == hook) 12429680Sgibbs break; 12529680Sgibbs if (hook_entry == NULL) 12629680Sgibbs panic("config_intrhook_disestablish: disestablishing an " 12729680Sgibbs "unestablished hook"); 12829680Sgibbs 12929680Sgibbs TAILQ_REMOVE(&intr_config_hook_list, hook, ich_links); 13029680Sgibbs /* Wakeup anyone watching the list */ 13129680Sgibbs wakeup(&intr_config_hook_list); 13229680Sgibbs} 133