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      1 /*	$NetBSD: mainbus.c,v 1.25 2021/08/07 16:18:42 thorpej Exp $	*/
      2 /*	$OpenBSD: mainbus.c,v 1.4 1998/10/15 21:30:15 imp Exp $	*/
      3 /*	NetBSD: mainbus.c,v 1.3 1995/06/28 02:45:10 cgd Exp 	*/
      4 
      5 /*
      6  * Copyright (c) 1997 Per Fogelstrom.
      7  * Copyright (c) 1994, 1995 Carnegie-Mellon University.
      8  * All rights reserved.
      9  *
     10  * Author: Chris G. Demetriou
     11  *
     12  * Permission to use, copy, modify and distribute this software and
     13  * its documentation is hereby granted, provided that both the copyright
     14  * notice and this permission notice appear in all copies of the
     15  * software, derivative works or modified versions, and any portions
     16  * thereof, and that both notices appear in supporting documentation.
     17  *
     18  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     19  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     20  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     21  *
     22  * Carnegie Mellon requests users of this software to return to
     23  *
     24  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     25  *  School of Computer Science
     26  *  Carnegie Mellon University
     27  *  Pittsburgh PA 15213-3890
     28  *
     29  * any improvements or extensions that they make and grant Carnegie the
     30  * rights to redistribute these changes.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 __KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.25 2021/08/07 16:18:42 thorpej Exp $");
     35 
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 #include <sys/device.h>
     39 
     40 #include <machine/autoconf.h>
     41 #include <machine/platform.h>
     42 
     43 /* Definition of the mainbus driver. */
     44 static int	mbmatch(device_t, cfdata_t, void *);
     45 static void	mbattach(device_t, device_t, void *);
     46 static int	mbprint(void *, const char *);
     47 
     48 CFATTACH_DECL_NEW(mainbus, 0,
     49     mbmatch, mbattach, NULL, NULL);
     50 
     51 static int mainbus_found;
     52 
     53 static int
     54 mbmatch(device_t parent, cfdata_t cf, void *aux)
     55 {
     56 
     57 	if (mainbus_found)
     58 		return 0;
     59 
     60 	return 1;
     61 }
     62 
     63 static void
     64 mbattach(device_t parent, device_t self, void *aux)
     65 {
     66 	struct confargs nca;
     67 	int i;
     68 
     69 	mainbus_found = 1;
     70 
     71 	aprint_normal("\n");
     72 
     73 	/*
     74 	 * Try to find and attach all of the CPUs in the machine.
     75 	 * ( Right now only one CPU so code is simple )
     76 	 */
     77 
     78 	nca.ca_name = "cpu";
     79 	nca.ca_slot = 0;
     80 	nca.ca_offset = 0;
     81 	config_found(self, &nca, mbprint, CFARGS_NONE);
     82 
     83 	for (i = 0; platform->mainbusdevs[i] != NULL; i++) {
     84 		nca.ca_name = platform->mainbusdevs[i];
     85 		nca.ca_slot = 0;
     86 		nca.ca_offset = 0;
     87 		config_found(self, &nca, mbprint, CFARGS_NONE);
     88 	}
     89 }
     90 
     91 static int
     92 mbprint(void *aux, const char *pnp)
     93 {
     94 
     95 	if (pnp)
     96 		return QUIET;
     97 	return UNCONF;
     98 }
     99