1 /* $NetBSD: autoconf.c,v 1.30 2025/10/04 04:16:39 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)autoconf.c 7.1 (Berkeley) 5/9/91 35 */ 36 37 /* 38 * Setup the system to run on the current machine. 39 * 40 * Configure() is called at boot time and initializes the vba 41 * device tables and the memory controller monitoring. Available 42 * devices are determined (from possibilities mentioned in ioconf.c), 43 * and the drivers are initialized. 44 */ 45 46 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.30 2025/10/04 04:16:39 thorpej Exp $"); 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/buf.h> 52 #include <sys/disk.h> 53 #include <sys/disklabel.h> 54 #include <sys/conf.h> 55 #include <sys/reboot.h> 56 #include <sys/device.h> 57 #include <sys/queue.h> 58 59 #include "pci.h" 60 #if NPCI > 0 61 #include <dev/pci/pcireg.h> 62 #include <dev/pci/pcivar.h> 63 #endif 64 #include <dev/ata/atareg.h> 65 #include <dev/ata/atavar.h> 66 #include <dev/ata/wdvar.h> 67 #include <dev/scsipi/sdvar.h> 68 69 #include <machine/bootinfo.h> 70 #include <machine/pte.h> 71 #include <machine/intr.h> 72 73 void genppc_cpu_configure(void); 74 static void findroot(void); 75 76 static int bus, target, lun, drive; 77 static const char *name = NULL; 78 79 /* 80 * Determine i/o configuration for a machine. 81 */ 82 83 void 84 cpu_configure(void) 85 { 86 87 findroot(); 88 89 if (config_rootfound("mainbus", NULL) == NULL) 90 panic("configure: mainbus not configured"); 91 92 genppc_cpu_configure(); 93 } 94 95 void 96 cpu_rootconf(void) 97 { 98 99 aprint_normal("boot device: %s\n", 100 booted_device ? device_xname(booted_device) : "<unknown>"); 101 102 rootconf(); 103 } 104 105 /* 106 * Attempt to find the device from which we were booted. 107 * If we can do so, and not instructed not to do so, 108 * change rootdev to correspond to the load device. 109 */ 110 static void 111 findroot(void) 112 { 113 struct btinfo_rootdevice *rdev; 114 int part; 115 char *p; 116 117 target = lun = drive = -1; 118 119 rdev = (struct btinfo_rootdevice *)lookup_bootinfo(BTINFO_ROOTDEVICE); 120 if (rdev == NULL) 121 return; 122 p = rdev->rootdevice; 123 if (strncmp(p, "/dev/disk/", 10) != 0) 124 /* unknown device... */ 125 return; 126 p += 10; 127 if (strncmp(p, "scsi/", 5) == 0) { 128 name = "sd"; 129 p += 5; 130 131 if (!isdigit(*(p + 0)) || 132 !isdigit(*(p + 1)) || 133 !isdigit(*(p + 2)) || 134 *(p + 3) != '/') 135 return; 136 bus = (*p++) - '0'; 137 target = (*p++) - '0'; 138 lun = (*p++) - '0'; 139 } else if (strncmp(p, "ide/", 4) == 0) { 140 name = "wd"; 141 p += 4; 142 143 bus = (*p++) - '0'; 144 if (*p++ != '/') 145 return; 146 if (strncmp(p, "master/", 7) == 0) { 147 drive = 0; 148 p += 8; 149 } else if (strncmp(p, "slave/", 6) == 0) { 150 drive = 1; 151 p += 7; 152 } else 153 return; 154 } else if (strcmp(p, "floppy") == 0) 155 return; 156 else 157 /* unknown disk... */ 158 return; 159 160 if (*(p + 0) != '0' || *(p + 1) != '_' || !isdigit(*(p + 2))) 161 return; 162 p += 2; 163 part = (*p++) - '0'; 164 if (*p != '\0') 165 return; 166 167 booted_partition = part; 168 } 169 170 void 171 device_register(device_t dev, void *aux) 172 { 173 device_t bdev, cdev; 174 175 #if NPCI > 0 176 if (device_is_a(dev, "genfb") && 177 device_is_a(device_parent(dev), "pci")) { 178 prop_dictionary_t dict = device_properties(dev); 179 struct pci_attach_args *pa = aux; 180 pcireg_t bar0; 181 uint32_t fbaddr; 182 183 bar0 = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_MAPREG_START); 184 fbaddr = PCI_MAPREG_MEM_ADDR(bar0); 185 186 prop_dictionary_set_bool(dict, "is_console", 1); 187 prop_dictionary_set_uint32(dict, "width", 640); 188 prop_dictionary_set_uint32(dict, "height", 480); 189 prop_dictionary_set_uint32(dict, "depth", 8); 190 prop_dictionary_set_uint32(dict, "address", fbaddr); 191 } 192 193 if (device_is_a(dev, "siop") && 194 device_is_a(device_parent(dev), "pci")) { 195 struct pci_attach_args *pa = aux; 196 int pbus, device; 197 198 pci_decompose_tag(pa->pa_pc, pa->pa_tag, &pbus, &device, NULL); 199 if (pbus == 0 && device == 12) { 200 /* Internal SCSI uses PCI clock as SCSI clock */ 201 device_setprop_bool(dev, "use_pciclock", true); 202 } 203 } 204 #endif 205 206 if (booted_device != NULL) 207 return; 208 /* 209 * Check boot device. 210 * It is sd/wd connected by the onboard controller to be supported. 211 */ 212 if (device_is_a(dev, "sd") && strcmp(name, "sd") == 0) { 213 struct scsipibus_attach_args *sa = aux; 214 215 bdev = device_parent(dev); 216 if (!device_is_a(bdev, "scsibus")) 217 return; 218 cdev = device_parent(bdev); 219 if (!device_is_a(cdev, "siop")) 220 return; 221 222 if (sa->sa_periph->periph_target == target && 223 sa->sa_periph->periph_lun == lun) 224 booted_device = dev; 225 } else if (device_is_a(dev, "wd") && strcmp(name, "wd") == 0) { 226 struct ata_device *adev = aux; 227 228 bdev = device_parent(dev); 229 if (!device_is_a(bdev, "atabus")) 230 return; 231 cdev = device_parent(bdev); 232 if (!device_is_a(cdev, "wdc")) 233 return; 234 if (!device_is_a(device_parent(cdev), "isa")) 235 return; 236 237 if (adev->adev_drv_data->drive == drive) 238 booted_device = dev; 239 } 240 } 241 242
Indexes created Sun Oct 25 00:26:45 UTC 2026