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autoconf.c revision 1.2 
      1 /*	$NetBSD: autoconf.c,v 1.2 2009/12/14 00:46:02 matt 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 1.2 2009/12/14 00:46:02 matt 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()
     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()
     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 	struct device *dv;
     87 
     88 	if (booted_device)
     89 		return;
     90 
     91 	if ((booted_device == NULL) && netboot == 0)
     92 		for (dv = TAILQ_FIRST(&alldevs); dv != NULL;
     93 		     dv = TAILQ_NEXT(dv, dv_list))
     94 			if (device_class(dv) == DV_DISK &&
     95 			    device_is_a(dv, "wd"))
     96 				    booted_device = dv;
     97 
     98 	/*
     99 	 * XXX Match up MBR boot specification with BSD disklabel for root?
    100 	 */
    101 	booted_partition = 0;
    102 
    103 	return;
    104 }
    105 
    106 void
    107 device_register(dev, aux)
    108 	struct device *dev;
    109 	void *aux;
    110 {
    111 	if ((booted_device == NULL) && (netboot == 1))
    112 		if (device_class(dev) == DV_IFNET)
    113 			booted_device = dev;
    114 }
    115