1 /* $NetBSD: autoconf.c,v 1.6 2002/09/06 13:18:43 gehenna 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 <powerpc/mpc6xx/pte.h> 59 60 struct device *booted_device; 61 int booted_partition; 62 63 void findroot __P((void)); 64 void disable_intr(void); 65 void enable_intr(void); 66 67 /* 68 * Determine i/o configuration for a machine. 69 */ 70 void 71 cpu_configure() 72 { 73 /* startrtclock(); */ 74 75 disable_intr(); 76 77 if (config_rootfound("mainbus", NULL) == NULL) 78 panic("configure: mainbus not configured"); 79 80 printf("biomask %x netmask %x ttymask %x\n", 81 (u_short)imask[IPL_BIO], (u_short)imask[IPL_NET], 82 (u_short)imask[IPL_TTY]); 83 84 enable_intr(); 85 86 spl0(); 87 } 88 89 void 90 cpu_rootconf() 91 { 92 findroot(); 93 94 printf("boot device: %s\n", 95 booted_device ? booted_device->dv_xname : "<unknown>"); 96 97 setroot(booted_device, booted_partition); 98 } 99 100 u_long bootdev = 0; /* should be dev_t, but not until 32 bits */ 101 102 /* 103 * Attempt to find the device from which we were booted. 104 * If we can do so, and not instructed not to do so, 105 * change rootdev to correspond to the load device. 106 */ 107 void 108 findroot(void) 109 { 110 int unit, part; 111 struct device *dv; 112 char buf[32]; 113 const char *name; 114 115 #if 0 116 printf("howto %x bootdev %x ", boothowto, bootdev); 117 #endif 118 119 if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC) 120 return; 121 122 name = devsw_blk2name((bootdev >> B_TYPESHIFT) & B_TYPEMASK); 123 if (name == NULL) 124 return; 125 126 part = (bootdev >> B_PARTITIONSHIFT) & B_PARTITIONMASK; 127 unit = (bootdev >> B_UNITSHIFT) & B_UNITMASK; 128 129 sprintf(buf, "%s%d", name, unit); 130 for (dv = alldevs.tqh_first; dv != NULL; dv = dv->dv_list.tqe_next) { 131 if (strcmp(buf, dv->dv_xname) == 0) { 132 booted_device = dv; 133 booted_partition = part; 134 return; 135 } 136 } 137 } 138