1/* $NetBSD: autoconf.c,v 1.25 2012/07/29 18:05:43 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 1.25 2012/07/29 18:05:43 mlelstv Exp $"); 43 44#include <sys/param.h> 45#include <sys/systm.h> 46#include <sys/conf.h> 47#include <sys/device.h> 48 49#include <machine/disklabel.h> 50 51#include <machine/sysconf.h> 52#include <machine/config_hook.h> 53 54void makebootdev(const char *); 55 56static char __booted_device_name[16]; 57static void get_device(const char *); 58 59/* 60 * Setup the system to run on the current machine. 61 * 62 * cpu_configure() is called at boot time. Available 63 * devices are determined (from possibilities mentioned in ioconf.c), 64 * and the drivers are initialized. 65 */ 66void 67cpu_configure(void) 68{ 69 70 /* Kick off autoconfiguration. */ 71 (void)splhigh(); 72 73 config_hook_init(); 74 75 if (config_rootfound("mainbus", NULL) == NULL) 76 panic("no mainbus found"); 77 78 /* Configuration is finished, turn on interrupts. */ 79 spl0(); /* enable all source forcing SOFT_INTs cleared */ 80} 81 82void 83cpu_rootconf(void) 84{ 85 86 get_device(__booted_device_name); 87 88 printf("boot device: %s\n", 89 booted_device ? device_xname(booted_device) : "<unknown>"); 90 91 rootconf(); 92} 93 94void 95makebootdev(const char *cp) 96{ 97 98 strncpy(__booted_device_name, cp, 16); 99} 100 101static void 102get_device(const char *name) 103{ 104 int unit, part; 105 char devname[16]; 106 const char *cp; 107 device_t dv; 108 109 if (strncmp(name, "/dev/", 5) == 0) 110 name += 5; 111 112 if (devsw_name2blk(name, devname, sizeof(devname)) == -1) 113 return; 114 115 name += strlen(devname); 116 unit = part = 0; 117 118 cp = name; 119 while (*cp >= '0' && *cp <= '9') 120 unit = (unit * 10) + (*cp++ - '0'); 121 if (cp == name) 122 return; 123 124 if (*cp >= 'a' && *cp <= ('a' + MAXPARTITIONS)) 125 part = *cp - 'a'; 126 else if (*cp != '\0' && *cp != ' ') 127 return; 128 if ((dv = device_find_by_driver_unit(devname, unit)) != NULL) { 129 booted_device = dv; 130 booted_partition = part; 131 } 132} 133