1 /* $NetBSD: mainbus.c,v 1.37 2021/08/07 16:18:40 thorpej 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 1.37 2021/08/07 16:18:40 thorpej 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/alpha.h>
41 #include <machine/autoconf.h>
42 #include <machine/rpb.h>
43 #include <machine/cpuconf.h>
44
45 /* Definition of the mainbus driver. */
46 static int mbmatch(device_t, cfdata_t, void *);
47 static void mbattach(device_t, device_t, void *);
48 static int mbprint(void *, const char *);
49
50 CFATTACH_DECL_NEW(mainbus, 0, mbmatch, mbattach, NULL, NULL);
51
52 /* There can be only one. */
53 int mainbus_found;
54
55 static int
mbmatch(device_t parent,cfdata_t cf,void * aux)56 mbmatch(device_t parent, cfdata_t cf, void *aux)
57 {
58
59 if (mainbus_found)
60 return (0);
61
62 return (1);
63 }
64
65 static void
mbattach(device_t parent,device_t self,void * aux)66 mbattach(device_t parent, device_t self, void *aux)
67 {
68 struct mainbus_attach_args ma;
69 struct pcs *pcsp;
70 int i, cpuattachcnt;
71 extern int ncpus;
72
73 mainbus_found = 1;
74
75 printf("\n");
76
77 /*
78 * Try to find and attach all of the CPUs in the machine.
79 */
80 cpuattachcnt = 0;
81 for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) {
82 pcsp = LOCATE_PCS(hwrpb, i);
83 if ((pcsp->pcs_flags & PCS_PP) == 0)
84 continue;
85
86 ma.ma_name = "cpu";
87 ma.ma_slot = i;
88 if (config_found(self, &ma, mbprint, CFARGS_NONE) != NULL)
89 cpuattachcnt++;
90 }
91 if (ncpus != cpuattachcnt)
92 printf("WARNING: %d cpus in machine, %d attached\n",
93 ncpus, cpuattachcnt);
94
95 /* Patch-up any routines based on architecture features. */
96 alpha_patch(false);
97
98 if (alpha_is_qemu) {
99 ma.ma_name = "qemu";
100 ma.ma_slot = 0; /* meaningless */
101 config_found(self, &ma, mbprint, CFARGS_NONE);
102 }
103
104 if (platform.iobus != NULL) {
105 ma.ma_name = platform.iobus;
106 ma.ma_slot = 0; /* meaningless */
107 config_found(self, &ma, mbprint, CFARGS_NONE);
108 }
109 }
110
111 static int
mbprint(void * aux,const char * pnp)112 mbprint(void *aux, const char *pnp)
113 {
114 struct mainbus_attach_args *ma = aux;
115
116 if (pnp)
117 aprint_normal("%s at %s", ma->ma_name, pnp);
118
119 return (UNCONF);
120 }
121