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      1 /* $NetBSD: mainbus.c,v 1.7 2021/08/07 16:19:07 thorpej Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2008 Tetsuya Isaki. All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     22  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 /*
     29  * mainbus driver
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.7 2021/08/07 16:19:07 thorpej Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/device.h>
     38 
     39 static int  mainbus_match(device_t, cfdata_t, void *);
     40 static void mainbus_attach(device_t, device_t, void *);
     41 
     42 CFATTACH_DECL_NEW(mainbus, 0,
     43 	mainbus_match, mainbus_attach, NULL, NULL);
     44 
     45 static int mainbus_attached;
     46 
     47 static int
     48 mainbus_match(device_t parent, cfdata_t cf, void *aux)
     49 {
     50 
     51 	if (mainbus_attached)
     52 		return 0;
     53 
     54 	return 1;
     55 }
     56 
     57 /*
     58  * "find" all the things that should be there.
     59  */
     60 static void
     61 mainbus_attach(device_t parent, device_t self, void *aux)
     62 {
     63 
     64 	mainbus_attached = 1;
     65 
     66 	aprint_normal("\n");
     67 
     68 	config_found(self, __UNCONST("intio")  , NULL, CFARGS_NONE);
     69 	config_found(self, __UNCONST("grfbus") , NULL, CFARGS_NONE);
     70 }
     71