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autoconf.c revision 1.12 
      1 /*	$NetBSD: autoconf.c,v 1.12 2009/03/18 10:22:28 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 1.12 2009/03/18 10:22:28 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 void findroot(void);
     58 
     59 /*
     60  * Determine i/o configuration for a machine.
     61  */
     62 void
     63 cpu_configure(void)
     64 {
     65         extern void init_interrupt(void);
     66 
     67 	extintr_disable();
     68 
     69         init_interrupt();
     70 
     71 	if (config_rootfound("mainbus", NULL) == NULL)
     72 		panic("configure: mainbus not configured");
     73 
     74 	printf("biomask %x.%x.%x.%x netmask %x.%x.%x.%x ttymask %x.%x.%x.%x\n",
     75 	    imask[IPL_BIO].bits[0], imask[IPL_BIO].bits[1],
     76 	    imask[IPL_BIO].bits[2], imask[IPL_BIO].bits[3],
     77 	    imask[IPL_NET].bits[0], imask[IPL_NET].bits[1],
     78 	    imask[IPL_NET].bits[2], imask[IPL_NET].bits[3],
     79 	    imask[IPL_TTY].bits[0], imask[IPL_TTY].bits[1],
     80 	    imask[IPL_TTY].bits[2], imask[IPL_TTY].bits[3]);
     81 
     82 	curcpu()->ci_cpl = IPL_NONE;
     83 	extintr_enable();
     84 
     85 	spl0();
     86 }
     87 
     88 void
     89 cpu_rootconf(void)
     90 {
     91 	findroot();
     92 
     93 	printf("boot device: %s\n",
     94 	    booted_device ? booted_device->dv_xname : "<unknown>");
     95 
     96 	setroot(booted_device, booted_partition);
     97 }
     98 
     99 dev_t	bootdev = 0;
    100 
    101 /*
    102  * Attempt to find the device from which we were booted.
    103  * If we can do so, and not instructed not to do so,
    104  * change rootdev to correspond to the load device.
    105  */
    106 void
    107 findroot(void)
    108 {
    109 	device_t dv;
    110 	const char *name;
    111 
    112 #if 0
    113 	printf("howto %x bootdev %x ", boothowto, bootdev);
    114 #endif
    115 
    116 	if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
    117 		return;
    118 
    119 
    120 	name = devsw_blk2name(B_TYPE(bootdev));
    121 	if (name == NULL)
    122 		return;
    123 
    124 	if ((dv = device_find_by_driver_unit(name, B_UNIT(bootdev))) != NULL) {
    125 		booted_device = dv;
    126 		booted_partition = B_PARTITION(bootdev);
    127 	}
    128 }
    129 
    130 void
    131 device_register(struct device *dev, void *aux)
    132 {
    133 }
    134