1 /* $NetBSD: autoconf.c,v 1.15 2009/11/05 00:35:43 dyoung Exp $ */ 2 3 /* 4 * Copyright 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Simon Burge for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.15 2009/11/05 00:35:43 dyoung Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/buf.h> 44 #include <sys/conf.h> 45 #include <sys/device.h> 46 #include <sys/cpu.h> 47 48 static void findroot(void); 49 50 void 51 cpu_configure(void) 52 { 53 54 intr_init(); 55 56 /* Kick off autoconfiguration. */ 57 (void)splhigh(); 58 if (config_rootfound("mainbus", NULL) == NULL) 59 panic("no mainbus found"); 60 61 /* 62 * Hardware interrupts will be enabled in 63 * sys/arch/mips/mips/mips3_clockintr.c:mips3_initclocks() 64 * to avoid hardclock(9) by CPU INT5 before softclockintr is 65 * initialized in initclocks(). 66 */ 67 } 68 69 void 70 cpu_rootconf(void) 71 { 72 findroot(); 73 74 printf("boot device: %s\n", 75 booted_device ? booted_device->dv_xname : "<unknown>"); 76 77 setroot(booted_device, booted_partition); 78 } 79 80 extern char bootstring[]; 81 extern int netboot; 82 83 static void 84 findroot(void) 85 { 86 device_t dv; 87 deviter_t di; 88 89 if (booted_device) 90 return; 91 92 if ((booted_device == NULL) && netboot == 0) { 93 for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST); dv != NULL; 94 dv = deviter_next(&di)) { 95 if (device_class(dv) == DV_DISK && 96 device_is_a(dv, "wd")) 97 booted_device = dv; 98 } 99 deviter_release(&di); 100 } 101 102 /* 103 * XXX Match up MBR boot specification with BSD disklabel for root? 104 */ 105 booted_partition = 0; 106 107 return; 108 } 109 110 void 111 device_register(struct device *dev, void *aux) 112 { 113 if ((booted_device == NULL) && (netboot == 1)) 114 if (device_class(dev) == DV_IFNET) 115 booted_device = dev; 116 } 117