1/* $NetBSD: mainbus.c,v 1.44 2021/08/07 16:19:02 thorpej Exp $ */
2
3/*
4 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Chris G. Demetriou
8 * DECstation port: Jonathan Stone
9 *
10 * Permission to use, copy, modify and distribute this software and
11 * its documentation is hereby granted, provided that both the copyright
12 * notice and this permission notice appear in all copies of the
13 * software, derivative works or modified versions, and any portions
14 * thereof, and that both notices appear in supporting documentation.
15 *
16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19 *
20 * Carnegie Mellon requests users of this software to return to
21 *
22 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
23 *  School of Computer Science
24 *  Carnegie Mellon University
25 *  Pittsburgh PA 15213-3890
26 *
27 * any improvements or extensions that they make and grant Carnegie the
28 * rights to redistribute these changes.
29 */
30
31#include <sys/cdefs.h>
32__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.44 2021/08/07 16:19:02 thorpej Exp $");
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/device.h>
37
38#include <pmax/sysconf.h>
39#include <pmax/autoconf.h>
40
41/* Definition of the mainbus driver. */
42static int	mbmatch(device_t, cfdata_t, void *);
43static void	mbattach(device_t, device_t, void *);
44static int	mbprint(void *, const char *);
45
46CFATTACH_DECL_NEW(mainbus, 0,
47    mbmatch, mbattach, NULL, NULL);
48
49static int mainbus_found;
50
51static int
52mbmatch(device_t parent, cfdata_t cf, void *aux)
53{
54
55	if (mainbus_found)
56		return 0;
57
58	return 1;
59}
60
61int ncpus = 0;	/* only support uniprocessors, for now */
62
63static void
64mbattach(device_t parent, device_t self, void *aux)
65{
66	struct mainbus_attach_args ma;
67
68	mainbus_found = 1;
69
70	aprint_normal("\n");
71
72	/*
73	 * if we ever support multi-processor DECsystem (5800 family),
74	 * the Alpha port's mainbus.c has an example of attaching
75	 * multiple CPUs.
76	 *
77	 * For now, we only have one. Attach it directly.
78	 */
79 	ma.ma_name = "cpu";
80	ma.ma_slot = 0;
81	config_found(self, &ma, mbprint, CFARGS_NONE);
82
83	ma.ma_name = platform.iobus;
84	ma.ma_slot = 0;
85	config_found(self, &ma, mbprint, CFARGS_NONE);
86}
87
88static int
89mbprint(void *aux, const char *pnp)
90{
91
92	if (pnp)
93		return QUIET;
94	return UNCONF;
95}
96