1 /* $NetBSD: autoconf.c,v 1.7 2002/09/25 22:21:12 thorpej 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. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. 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 * from: Utah Hdr: autoconf.c 1.31 91/01/21 41 * 42 * @(#)autoconf.c 8.1 (Berkeley) 6/10/93 43 */ 44 45 /* 46 * Setup the system to run on the current machine. 47 * 48 * Configure() is called at boot time. Available 49 * devices are determined (from possibilities mentioned in ioconf.c), 50 * and the drivers are initialized. 51 */ 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/buf.h> 56 #include <sys/dkstat.h> 57 #include <sys/conf.h> 58 #include <sys/reboot.h> 59 #include <sys/device.h> 60 61 #include <dev/scsipi/scsi_all.h> 62 #include <dev/scsipi/scsipi_all.h> 63 #include <dev/scsipi/scsiconf.h> 64 65 #include <machine/cpu.h> 66 #include <machine/mainboard.h> 67 #include <machine/autoconf.h> 68 69 /* 70 * The following several variables are related to 71 * the configuration process, and are used in initializing 72 * the machine. 73 */ 74 int cpuspeed = 25; /* approx # instr per usec. */ 75 76 extern int initcpu __P((void)); /*XXX*/ 77 78 void findroot __P((struct device **, int *)); 79 80 struct mipsco_intrhand intrtab[MAX_INTR_COOKIES]; 81 struct device *booted_device; 82 static int booted_partition; 83 84 /* 85 * Determine mass storage and memory configuration for a machine. 86 * Print cpu type, and then iterate over an array of devices 87 * found on the baseboard or in turbochannel option slots. 88 * Once devices are configured, enable interrupts, and probe 89 * for attached scsi devices. 90 */ 91 void 92 cpu_configure() 93 { 94 int s; 95 96 softintr_init(); 97 /* 98 * Kick off autoconfiguration 99 */ 100 s = splhigh(); 101 if (config_rootfound("mainbus", "mainbus") == NULL) 102 panic("no mainbus found"); 103 initcpu(); 104 } 105 106 void 107 cpu_rootconf() 108 { 109 findroot(&booted_device, &booted_partition); 110 111 printf("boot device: %s\n", 112 booted_device ? booted_device->dv_xname : "<unknown>"); 113 setroot(booted_device, booted_partition); 114 } 115 116 dev_t bootdev = NULL; 117 char boot_class; 118 int boot_id, boot_lun, boot_part; 119 120 /* 121 * Attempt to find the device from which we were booted. 122 */ 123 void 124 findroot(devpp, partp) 125 struct device **devpp; 126 int *partp; 127 { 128 struct device *dv; 129 130 for (dv = TAILQ_FIRST(&alldevs); dv; dv = TAILQ_NEXT(dv, dv_list)) { 131 if (dv->dv_class == boot_class && dv->dv_unit == boot_id) { 132 *devpp = dv; 133 *partp = boot_part; 134 return; 135 } 136 } 137 138 /* 139 * Default to "not found". 140 */ 141 *devpp = NULL; 142 *partp = 0; 143 return; 144 } 145 146 void 147 makebootdev(cp) 148 char *cp; 149 { 150 boot_class = -1; 151 boot_id = boot_lun = boot_part = 0; 152 153 if (strlen(cp) < 6) 154 return; 155 if (strncmp(cp, "dk", 2) == 0 && cp[4] == '(') { /* Disk */ 156 cp += 5; 157 if (*cp >= '0' && *cp <= '9') 158 boot_lun = *cp++ - '0'; 159 if (*cp == ',') 160 cp += 1; 161 if (*cp >= '0' && *cp <= '9') 162 boot_id = *cp++ - '0'; 163 if (*cp == ',') 164 cp += 1; 165 if (*cp >= '0' && *cp <= '7') 166 boot_part = *cp - '0'; 167 boot_class = DV_DISK; 168 return; 169 } 170 } 171