1 /* $NetBSD: autoconf.c,v 1.11 2009/03/18 10:22:33 cegger 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)autoconf.c 7.1 (Berkeley) 5/9/91 35 */ 36 37 /* 38 * Setup the system to run on the current machine. 39 * 40 * Configure() is called at boot time and initializes the vba 41 * device tables and the memory controller monitoring. Available 42 * devices are determined (from possibilities mentioned in ioconf.c), 43 * and the drivers are initialized. 44 */ 45 46 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.11 2009/03/18 10:22:33 cegger Exp $"); 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/buf.h> 52 #include <sys/disklabel.h> 53 #include <sys/conf.h> 54 #include <sys/reboot.h> 55 #include <sys/device.h> 56 57 #include <machine/pte.h> 58 #include <machine/intr.h> 59 60 static void findroot(void); 61 62 /* 63 * Determine i/o configuration for a machine. 64 */ 65 void 66 cpu_configure(void) 67 { 68 69 if (config_rootfound("mainbus", NULL) == NULL) 70 panic("configure: mainbus not configured"); 71 72 genppc_cpu_configure(); 73 } 74 75 void 76 cpu_rootconf(void) 77 { 78 findroot(); 79 80 aprint_normal("boot device: %s\n", 81 booted_device ? booted_device->dv_xname : "<unknown>"); 82 83 setroot(booted_device, booted_partition); 84 } 85 86 u_long bootdev = 0; /* should be dev_t, but not until 32 bits */ 87 88 /* 89 * Attempt to find the device from which we were booted. 90 * If we can do so, and not instructed not to do so, 91 * change rootdev to correspond to the load device. 92 */ 93 void 94 findroot(void) 95 { 96 int unit, part; 97 device_t dv; 98 const char *name; 99 100 #if 0 101 aprint_normal("howto %x bootdev %x ", boothowto, bootdev); 102 #endif 103 104 if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC) 105 return; 106 107 name = devsw_blk2name((bootdev >> B_TYPESHIFT) & B_TYPEMASK); 108 if (name == NULL) 109 return; 110 111 part = (bootdev >> B_PARTITIONSHIFT) & B_PARTITIONMASK; 112 unit = (bootdev >> B_UNITSHIFT) & B_UNITMASK; 113 114 if ((dv = device_find_by_driver_unit(name, unit)) != NULL) { 115 booted_device = dv; 116 booted_partition = part; 117 } 118 } 119 120 void 121 device_register(struct device *dev, void *aux) 122 { 123 /* do nothing */ 124 } 125