1 /* $NetBSD: autoconf.c,v 1.22 2009/03/18 10:22:29 cegger Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department and Ralph Campbell. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: Utah Hdr: autoconf.c 1.31 91/01/21 36 * 37 * @(#)autoconf.c 8.1 (Berkeley) 6/10/93 38 */ 39 /* 40 * Copyright (c) 1988 University of Utah. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * the Systems Programming Group of the University of Utah Computer 44 * Science Department and Ralph Campbell. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * from: Utah Hdr: autoconf.c 1.31 91/01/21 75 * 76 * @(#)autoconf.c 8.1 (Berkeley) 6/10/93 77 */ 78 79 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 80 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.22 2009/03/18 10:22:29 cegger Exp $"); 81 82 #include <sys/param.h> 83 #include <sys/systm.h> 84 #include <sys/conf.h> /* setroot() */ 85 #include <sys/device.h> 86 87 #include <machine/disklabel.h> 88 89 #include <machine/sysconf.h> 90 #include <machine/config_hook.h> 91 92 void makebootdev(const char *); 93 94 static char __booted_device_name[16]; 95 static void get_device(const char *); 96 97 /* 98 * Setup the system to run on the current machine. 99 * 100 * cpu_configure() is called at boot time. Available 101 * devices are determined (from possibilities mentioned in ioconf.c), 102 * and the drivers are initialized. 103 */ 104 void 105 cpu_configure(void) 106 { 107 108 /* Kick off autoconfiguration. */ 109 (void)splhigh(); 110 111 config_hook_init(); 112 113 if (config_rootfound("mainbus", NULL) == NULL) 114 panic("no mainbus found"); 115 116 /* Configuration is finished, turn on interrupts. */ 117 _splnone(); /* enable all source forcing SOFT_INTs cleared */ 118 } 119 120 void 121 cpu_rootconf(void) 122 { 123 124 get_device(__booted_device_name); 125 126 printf("boot device: %s\n", 127 booted_device ? booted_device->dv_xname : "<unknown>"); 128 129 setroot(booted_device, booted_partition); 130 } 131 132 void 133 makebootdev(const char *cp) 134 { 135 136 strncpy(__booted_device_name, cp, 16); 137 } 138 139 static void 140 get_device(const char *name) 141 { 142 int unit, part; 143 char devname[16]; 144 const char *cp; 145 device_t dv; 146 147 if (strncmp(name, "/dev/", 5) == 0) 148 name += 5; 149 150 if (devsw_name2blk(name, devname, sizeof(devname)) == -1) 151 return; 152 153 name += strlen(devname); 154 unit = part = 0; 155 156 cp = name; 157 while (*cp >= '0' && *cp <= '9') 158 unit = (unit * 10) + (*cp++ - '0'); 159 if (cp == name) 160 return; 161 162 if (*cp >= 'a' && *cp <= ('a' + MAXPARTITIONS)) 163 part = *cp - 'a'; 164 else if (*cp != '\0' && *cp != ' ') 165 return; 166 if ((dv = device_find_by_driver_unit(devname, unit)) != NULL) { 167 booted_device = dv; 168 booted_partition = part; 169 } 170 } 171