1/* $NetBSD: mainbus.c,v 1.32 2008/07/09 20:23:50 joerg Exp $ */
2
3/*
4 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Chris G. Demetriou
8 *
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
22 *  School of Computer Science
23 *  Carnegie Mellon University
24 *  Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 */
29
30#include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
31
32__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.32 2008/07/09 20:23:50 joerg Exp $");
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/device.h>
37#include <sys/reboot.h>
38#include <sys/conf.h>
39
40#include <machine/autoconf.h>
41#include <machine/rpb.h>
42#include <machine/cpuconf.h>
43
44/* Definition of the mainbus driver. */
45static int	mbmatch(device_t, cfdata_t, void *);
46static void	mbattach(device_t, device_t, void *);
47static int	mbprint(void *, const char *);
48
49CFATTACH_DECL_NEW(mainbus, 0, mbmatch, mbattach, NULL, NULL);
50
51/* There can be only one. */
52int	mainbus_found;
53
54static int
55mbmatch(device_t parent, cfdata_t cf, void *aux)
56{
57
58	if (mainbus_found)
59		return (0);
60
61	return (1);
62}
63
64static void
65mbattach(device_t parent, device_t self, void *aux)
66{
67	struct mainbus_attach_args ma;
68	struct pcs *pcsp;
69	int i, cpuattachcnt;
70	extern int ncpus;
71
72	mainbus_found = 1;
73
74	printf("\n");
75
76	/*
77	 * Try to find and attach all of the CPUs in the machine.
78	 */
79	cpuattachcnt = 0;
80	for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) {
81		pcsp = LOCATE_PCS(hwrpb, i);
82		if ((pcsp->pcs_flags & PCS_PP) == 0)
83			continue;
84
85		ma.ma_name = "cpu";
86		ma.ma_slot = i;
87		if (config_found(self, &ma, mbprint) != NULL)
88			cpuattachcnt++;
89	}
90	if (ncpus != cpuattachcnt)
91		printf("WARNING: %d cpus in machine, %d attached\n",
92			ncpus, cpuattachcnt);
93
94	if (platform.iobus != NULL) {
95		ma.ma_name = platform.iobus;
96		ma.ma_slot = 0;			/* meaningless */
97		config_found(self, &ma, mbprint);
98	}
99}
100
101static int
102mbprint(void *aux, const char *pnp)
103{
104	struct mainbus_attach_args *ma = aux;
105
106	if (pnp)
107		aprint_normal("%s at %s", ma->ma_name, pnp);
108
109	return (UNCONF);
110}
111