1 /* $NetBSD: autoconf.c,v 1.74 2012/10/27 17:17:59 chs Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)autoconf.c 8.4 (Berkeley) 10/1/93 41 */ 42 43 /* 44 * Setup the system to run on the current machine. 45 * 46 * Configure() is called at boot time. Available 47 * devices are determined (from possibilities mentioned in ioconf.c), 48 * and the drivers are initialized. 49 */ 50 51 #include <sys/cdefs.h> 52 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.74 2012/10/27 17:17:59 chs Exp $"); 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/buf.h> 57 #include <sys/disklabel.h> 58 #include <sys/conf.h> 59 #include <sys/reboot.h> 60 #include <sys/device.h> 61 #include <sys/disk.h> 62 63 #include <dev/cons.h> 64 65 #include <machine/autoconf.h> 66 #include <machine/viareg.h> 67 68 #include <dev/scsipi/scsi_all.h> 69 #include <dev/scsipi/scsipi_all.h> 70 #include <dev/scsipi/scsiconf.h> 71 72 #include "scsibus.h" 73 74 static void findbootdev(void); 75 #if NSCSIBUS > 0 76 static int target_to_unit(u_long, u_long, u_long); 77 #endif /* NSCSIBUS > 0 */ 78 79 /* 80 * cpu_configure: 81 * called at boot time, configure all devices on the system 82 */ 83 void 84 cpu_configure(void) 85 { 86 87 mrg_init(); /* Init Mac ROM Glue */ 88 startrtclock(); /* start before ADB attached */ 89 90 if (config_rootfound("mainbus", NULL) == NULL) 91 panic("No mainbus found!"); 92 93 (void)spl0(); 94 } 95 96 void 97 cpu_rootconf(void) 98 { 99 100 findbootdev(); 101 102 printf("boot device: %s\n", 103 booted_device ? device_xname(booted_device) : "<unknown>"); 104 105 rootconf(); 106 } 107 108 /* 109 * Yanked from i386/i386/autoconf.c (and tweaked a bit) 110 */ 111 112 u_long bootdev; 113 114 static void 115 findbootdev(void) 116 { 117 device_t dv; 118 int major, unit, controller; 119 const char *name; 120 121 booted_device = NULL; 122 booted_partition = 0; /* Assume root is on partition a */ 123 124 major = B_TYPE(bootdev); 125 name = devsw_blk2name(major); 126 if (name == NULL) 127 return; 128 129 unit = B_UNIT(bootdev); 130 131 switch (major) { 132 case 4: /* SCSI drive */ 133 #if NSCSIBUS > 0 134 bootdev &= ~(B_UNITMASK << B_UNITSHIFT); /* XXX */ 135 unit = target_to_unit(-1, unit, 0); 136 bootdev |= (unit << B_UNITSHIFT); /* XXX */ 137 #else /* NSCSIBUS > 0 */ 138 panic("Boot device is on a SCSI drive but SCSI support " 139 "is not present"); 140 #endif /* NSCSIBUS > 0 */ 141 break; 142 case 22: /* IDE drive */ 143 /* 144 * controller(=channel=buses) uses only IDE drive. 145 * Here, controller always is 0. 146 */ 147 controller = B_CONTROLLER(bootdev); 148 unit = unit + (controller<<1); 149 break; 150 } 151 152 if ((dv = device_find_by_driver_unit(name, unit)) != NULL) 153 booted_device = dv; 154 } 155 156 /* 157 * Map a SCSI bus, target, lun to a device number. 158 * This could be tape, disk, CD. The calling routine, though, 159 * assumes DISK. It would be nice to allow CD, too... 160 */ 161 #if NSCSIBUS > 0 162 static int 163 target_to_unit(u_long bus, u_long target, u_long lun) 164 { 165 struct scsibus_softc *scsi; 166 struct scsipi_periph *periph; 167 extern struct cfdriver scsibus_cd; 168 169 if (target < 0 || target > 7 || lun < 0 || lun > 7) { 170 printf("scsi target to unit, target (%ld) or lun (%ld)" 171 " out of range.\n", target, lun); 172 return -1; 173 } 174 175 if (bus == -1) { 176 for (bus = 0 ; bus < scsibus_cd.cd_ndevs ; bus++) { 177 scsi = device_lookup_private(&scsibus_cd, bus); 178 if (!scsi) 179 continue; 180 periph = scsipi_lookup_periph(scsi->sc_channel, 181 target, lun); 182 if (!periph) 183 continue; 184 return device_unit(periph->periph_dev); 185 } 186 return -1; 187 } 188 if (bus < 0 || bus >= scsibus_cd.cd_ndevs) { 189 printf("scsi target to unit, bus (%ld) out of range.\n", bus); 190 return -1; 191 } 192 scsi = device_lookup_private(&scsibus_cd, bus); 193 if (!scsi) 194 return -1; 195 196 periph = scsipi_lookup_periph(scsi->sc_channel, 197 target, lun); 198 if (!periph) 199 return -1; 200 return device_unit(periph->periph_dev); 201 } 202 #endif /* NSCSIBUS > 0 */ 203
Indexes created Sun Oct 25 00:26:45 UTC 2026