136 lines
4.1 KiB
C
136 lines
4.1 KiB
C
/* $NetBSD: autoconf.c,v 1.4 2000/06/02 22:09:02 cgd Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)autoconf.c 7.1 (Berkeley) 5/9/91
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*/
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/*
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* Setup the system to run on the current machine.
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*
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* Configure() is called at boot time and initializes the vba
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* device tables and the memory controller monitoring. Available
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* devices are determined (from possibilities mentioned in ioconf.c),
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* and the drivers are initialized.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/dkstat.h>
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#include <sys/disklabel.h>
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#include <sys/conf.h>
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#include <sys/reboot.h>
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#include <sys/device.h>
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#include <machine/pte.h>
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#include <machine/intr.h>
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struct device *booted_device;
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int booted_partition;
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static void findroot __P((void));
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/*
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* Determine i/o configuration for a machine.
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*/
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void
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cpu_configure()
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{
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/* startrtclock(); */
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if (config_rootfound("mainbus", NULL) == NULL)
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panic("configure: mainbus not configured");
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printf("biomask %x netmask %x ttymask %x\n",
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(u_short)imask[IPL_BIO], (u_short)imask[IPL_NET],
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(u_short)imask[IPL_TTY]);
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spl0();
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}
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void
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cpu_rootconf()
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{
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findroot();
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printf("boot device: %s\n",
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booted_device ? booted_device->dv_xname : "<unknown>");
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setroot(booted_device, booted_partition);
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}
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u_long bootdev = 0; /* should be dev_t, but not until 32 bits */
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/*
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* Attempt to find the device from which we were booted.
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* If we can do so, and not instructed not to do so,
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* change rootdev to correspond to the load device.
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*/
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void
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findroot(void)
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{
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int i, majdev, unit, part;
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struct device *dv;
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char buf[32];
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#if 0
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printf("howto %x bootdev %x ", boothowto, bootdev);
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#endif
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if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
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return;
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majdev = (bootdev >> B_TYPESHIFT) & B_TYPEMASK;
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for (i = 0; dev_name2blk[i].d_name != NULL; i++)
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if (majdev == dev_name2blk[i].d_maj)
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break;
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if (dev_name2blk[i].d_name == NULL)
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return;
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part = (bootdev >> B_PARTITIONSHIFT) & B_PARTITIONMASK;
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unit = (bootdev >> B_UNITSHIFT) & B_UNITMASK;
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sprintf(buf, "%s%d", dev_name2blk[i].d_name, unit);
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for (dv = alldevs.tqh_first; dv != NULL;
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dv = dv->dv_list.tqe_next) {
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if (strcmp(buf, dv->dv_xname) == 0) {
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booted_device = dv;
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booted_partition = part;
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return;
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}
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}
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}
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