1 /* $NetBSD: autoconf.c,v 1.6 2012/07/29 18:05:47 mlelstv Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department and Ralph Campbell. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah Hdr: autoconf.c 1.31 91/01/21 37 * 38 * @(#)autoconf.c 8.1 (Berkeley) 6/10/93 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.6 2012/07/29 18:05:47 mlelstv Exp $"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/conf.h> 47 #include <sys/reboot.h> 48 #include <sys/device.h> 49 50 #include <machine/autoconf.h> 51 #include <machine/intr.h> 52 #include <machine/sysconf.h> 53 54 static int booted_bus, booted_unit; 55 static const char *booted_controller; 56 57 /* 58 * Configure all devices on system 59 */ 60 void 61 cpu_configure(void) 62 { 63 64 /* Kick off autoconfiguration. */ 65 (void)splhigh(); 66 67 /* Interrupt initialization. */ 68 intr_init(); 69 70 evcnt_attach_static(&emips_clock_evcnt); 71 evcnt_attach_static(&emips_fpu_evcnt); 72 evcnt_attach_static(&emips_memerr_evcnt); 73 74 if (config_rootfound("mainbus", NULL) == NULL) 75 panic("no mainbus found"); 76 77 /* Reset any bus errors due to probing nonexistent devices. */ 78 (*platform.bus_reset)(); 79 80 /* Configuration is finished, turn on interrupts. */ 81 spl0(); /* enable all source forcing SOFT_INTs cleared */ 82 } 83 84 /* 85 * Look at the string 'cp' and decode the boot device. 86 * Boot names are something like '0/ace(0,0)/netbsd' or 'tftp()/nfsnetbsd' 87 * meaning: 88 * [BusNumber/]<ControllerName>([<DiskNumber>,<PartitionNumber])/<kernelname> 89 */ 90 void 91 makebootdev(char *cp) 92 { 93 int i; 94 static char booted_controller_name[8]; 95 96 booted_device = NULL; 97 booted_bus = booted_unit = booted_partition = 0; 98 booted_controller = NULL; 99 100 if (*cp >= '0' && *cp <= '9') { 101 booted_bus = *cp++ - '0'; 102 if (*cp == '/') 103 cp++; 104 } 105 106 if (strncmp(cp, "tftp(", 5) == 0) { 107 booted_controller = "BOOTP"; 108 goto out; 109 } 110 111 /* 112 * Stash away the controller name and use it later 113 */ 114 for (i = 0; i < 7 && *cp && *cp != '('; i++) 115 booted_controller_name[i] = *cp++; 116 booted_controller_name[7] = 0; /* sanity */ 117 118 if (*cp == '(') 119 cp++; 120 if (*cp >= '0' && *cp <= '9') 121 booted_unit = *cp++ - '0'; 122 123 if (*cp == ',') 124 cp++; 125 if (*cp >= '0' && *cp <= '9') 126 booted_partition = *cp - '0'; 127 booted_controller = booted_controller_name; 128 129 out: 130 #if DEBUG 131 printf("bootdev: %d/%s(%d,%d)\n", 132 booted_bus, booted_controller, booted_unit, booted_partition); 133 #endif 134 return; 135 } 136 137 void 138 cpu_rootconf(void) 139 { 140 141 printf("boot device: %s part%d\n", 142 booted_device ? device_xname(booted_device) : "<unknown>", 143 booted_partition); 144 145 rootconf(); 146 } 147 148 /* 149 * Try to determine the boot device. 150 */ 151 void 152 device_register(device_t dev, void *aux) 153 { 154 static int found, initted, netboot; 155 static device_t ebusdev; 156 device_t parent = device_parent(dev); 157 158 if (found) 159 return; 160 161 #if 0 162 printf("\n[device_register(%s,%d) class %d]\n", 163 device_xname(dev), device_unit(dev), device_class(dev)); 164 #endif 165 166 if (!initted) { 167 netboot = (strcmp(booted_controller, "BOOTP") == 0); 168 initted = 1; 169 } 170 171 /* 172 * Remember the EBUS 173 */ 174 if (device_is_a(dev, "ebus")) { 175 ebusdev = dev; 176 return; 177 } 178 179 /* 180 * Check if netbooting. 181 */ 182 if (netboot) { 183 184 /* Only one Ethernet interface (on ebus). */ 185 if ((parent == ebusdev) && 186 device_is_a(dev, "enic")) { 187 booted_device = dev; 188 found = 1; 189 return; 190 } 191 192 /* allow any network adapter */ 193 if (device_class(dev) == DV_IFNET && 194 device_is_a(parent, "ebus")) { 195 booted_device = dev; 196 found = 1; 197 return; 198 } 199 200 /* The NIC might be found after the disk, so bail out here */ 201 return; 202 } 203 204 /* BUGBUG How would I get to the bus */ 205 if (device_is_a(dev, booted_controller) && 206 (device_unit(dev) == booted_unit)) { 207 booted_device = dev; 208 found = 1; 209 return; 210 } 211 } 212
Indexes created Sun Oct 25 00:26:45 UTC 2026