1 /* $NetBSD: autoconf.c,v 1.1 2002/02/27 21:02:23 scw 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)autoconf.c 7.1 (Berkeley) 5/9/91 39 */ 40 41 /* 42 * Setup the system to run on the current machine. 43 * 44 * Configure() is called at boot time and initializes the vba 45 * device tables and the memory controller monitoring. Available 46 * devices are determined (from possibilities mentioned in ioconf.c), 47 * and the drivers are initialized. 48 */ 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/buf.h> 52 #include <sys/dkstat.h> 53 #include <sys/disklabel.h> 54 #include <sys/conf.h> 55 #include <sys/reboot.h> 56 #include <sys/device.h> 57 58 #include <machine/pte.h> 59 #include <machine/intr.h> 60 61 struct device *booted_device; 62 int booted_partition; 63 64 static void findroot __P((void)); 65 66 /* 67 * Determine i/o configuration for a machine. 68 */ 69 void 70 cpu_configure() 71 { 72 /* startrtclock(); */ 73 74 if (config_rootfound("mainbus", NULL) == NULL) 75 panic("configure: mainbus not configured"); 76 77 printf("biomask %x netmask %x ttymask %x\n", 78 (u_short)imask[IPL_BIO], (u_short)imask[IPL_NET], 79 (u_short)imask[IPL_TTY]); 80 81 spl0(); 82 } 83 84 void 85 cpu_rootconf() 86 { 87 findroot(); 88 89 printf("boot device: %s\n", 90 booted_device ? booted_device->dv_xname : "<unknown>"); 91 92 setroot(booted_device, booted_partition); 93 } 94 95 u_long bootdev = 0; /* should be dev_t, but not until 32 bits */ 96 97 /* 98 * Attempt to find the device from which we were booted. 99 * If we can do so, and not instructed not to do so, 100 * change rootdev to correspond to the load device. 101 */ 102 void 103 findroot(void) 104 { 105 int i, majdev, unit, part; 106 struct device *dv; 107 char buf[32]; 108 109 #if 0 110 printf("howto %x bootdev %x ", boothowto, bootdev); 111 #endif 112 113 if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC) 114 return; 115 116 majdev = (bootdev >> B_TYPESHIFT) & B_TYPEMASK; 117 for (i = 0; dev_name2blk[i].d_name != NULL; i++) 118 if (majdev == dev_name2blk[i].d_maj) 119 break; 120 if (dev_name2blk[i].d_name == NULL) 121 return; 122 123 part = (bootdev >> B_PARTITIONSHIFT) & B_PARTITIONMASK; 124 unit = (bootdev >> B_UNITSHIFT) & B_UNITMASK; 125 126 sprintf(buf, "%s%d", dev_name2blk[i].d_name, unit); 127 for (dv = alldevs.tqh_first; dv != NULL; 128 dv = dv->dv_list.tqe_next) { 129 if (strcmp(buf, dv->dv_xname) == 0) { 130 booted_device = dv; 131 booted_partition = part; 132 return; 133 } 134 } 135 } 136