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