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autoconf.c revision 1.6 
      1 /*	$NetBSD: autoconf.c,v 1.6 2003/08/07 16:27:23 agc 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 1.6 2003/08/07 16:27:23 agc 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 struct device *booted_device;
     58 int booted_partition;
     59 
     60 void findroot __P((void));
     61 
     62 /*
     63  * Determine i/o configuration for a machine.
     64  */
     65 void
     66 cpu_configure()
     67 {
     68         extern void init_interrupt __P((void));
     69         extern void calc_delayconst __P((void));
     70 
     71 	extintr_disable();
     72 
     73         init_interrupt();
     74         calc_delayconst();
     75 
     76 	if (config_rootfound("mainbus", NULL) == NULL)
     77 		panic("configure: mainbus not configured");
     78 
     79 	printf("biomask %x.%x.%x.%x netmask %x.%x.%x.%x ttymask %x.%x.%x.%x\n",
     80 	    imask[IPL_BIO].bits[0], imask[IPL_BIO].bits[1],
     81 	    imask[IPL_BIO].bits[2], imask[IPL_BIO].bits[3],
     82 	    imask[IPL_NET].bits[0], imask[IPL_NET].bits[1],
     83 	    imask[IPL_NET].bits[2], imask[IPL_NET].bits[3],
     84 	    imask[IPL_TTY].bits[0], imask[IPL_TTY].bits[1],
     85 	    imask[IPL_TTY].bits[2], imask[IPL_TTY].bits[3]);
     86 
     87 	curcpu()->ci_cpl = IPL_NONE;
     88 	extintr_enable();
     89 
     90 	spl0();
     91 }
     92 
     93 void
     94 cpu_rootconf()
     95 {
     96 	findroot();
     97 
     98 	printf("boot device: %s\n",
     99 	    booted_device ? booted_device->dv_xname : "<unknown>");
    100 
    101 	setroot(booted_device, booted_partition);
    102 }
    103 
    104 dev_t	bootdev = 0;
    105 
    106 /*
    107  * Attempt to find the device from which we were booted.
    108  * If we can do so, and not instructed not to do so,
    109  * change rootdev to correspond to the load device.
    110  */
    111 void
    112 findroot(void)
    113 {
    114 	struct device *dv;
    115 	const char *name;
    116 	char buf[32];
    117 
    118 #if 0
    119 	printf("howto %x bootdev %x ", boothowto, bootdev);
    120 #endif
    121 
    122 	if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
    123 		return;
    124 
    125 
    126 	name = devsw_blk2name(B_TYPE(bootdev));
    127 	if (name == NULL)
    128 		return;
    129 
    130 	sprintf(buf, "%s%d", name, B_UNIT(bootdev));
    131 	TAILQ_FOREACH(dv, &alldevs, dv_list) {
    132 		if (strcmp(buf, dv->dv_xname) == 0) {
    133 			booted_device = dv;
    134 			booted_partition = B_PARTITION(bootdev);
    135 			return;
    136 		}
    137 	}
    138 }
    139 
    140 void
    141 device_register(struct device *dev, void *aux)
    142 {
    143 }
    144