532 lines
14 KiB
C
532 lines
14 KiB
C
/* $NetBSD: autoconf.c,v 1.53 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 "opt_compat_oldboot.h"
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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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#ifdef COMPAT_OLDBOOT
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#include <sys/reboot.h>
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#endif
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/vnode.h>
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#include <sys/fcntl.h>
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#include <sys/dkio.h>
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#include <machine/pte.h>
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#include <machine/cpu.h>
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#include <machine/bootinfo.h>
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static int match_harddisk __P((struct device *, struct btinfo_bootdisk *));
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static void matchbiosdisks __P((void));
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static void findroot __P((void));
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extern struct disklist *i386_alldisks;
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extern int i386_ndisks;
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#include "bios32.h"
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#if NBIOS32 > 0
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#include <machine/bios32.h>
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#endif
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#include "opt_pcibios.h"
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#ifdef PCIBIOS
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <i386/pci/pcibios.h>
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#endif
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struct device *booted_device;
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int booted_partition;
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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 NBIOS32 > 0
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bios32_init();
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#endif
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#ifdef PCIBIOS
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pcibios_init();
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#endif
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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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/* Set up proc0's TSS and LDT (after the FPU is configured). */
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i386_proc0_tss_ldt_init();
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/* XXX Finish deferred buffer cache allocation. */
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i386_bufinit();
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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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matchbiosdisks();
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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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/*
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* XXX ugly bit of code. But, this is the only safe time that the
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* match between BIOS disks and native disks can be done.
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*/
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static void
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matchbiosdisks()
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{
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struct btinfo_biosgeom *big;
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struct bi_biosgeom_entry *be;
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struct device *dv;
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struct devnametobdevmaj *d;
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int i, ck, error, m, n;
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struct vnode *tv;
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char mbr[DEV_BSIZE];
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big = lookup_bootinfo(BTINFO_BIOSGEOM);
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if (big == NULL)
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return;
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/*
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* First, count all native disks
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*/
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for (dv = alldevs.tqh_first; dv != NULL; dv = dv->dv_list.tqe_next)
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if (dv->dv_class == DV_DISK &&
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(!strcmp(dv->dv_cfdata->cf_driver->cd_name, "sd") ||
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!strcmp(dv->dv_cfdata->cf_driver->cd_name, "wd") ||
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!strcmp(dv->dv_cfdata->cf_driver->cd_name, "ca")))
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i386_ndisks++;
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if (i386_ndisks == 0)
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return;
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/* XXX M_TEMP is wrong */
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i386_alldisks = malloc(sizeof (struct disklist) + (i386_ndisks - 1) *
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sizeof (struct nativedisk_info),
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M_TEMP, M_NOWAIT);
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if (i386_alldisks == NULL)
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return;
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i386_alldisks->dl_nnativedisks = i386_ndisks;
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i386_alldisks->dl_nbiosdisks = big->num;
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for (i = 0; i < big->num; i++) {
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i386_alldisks->dl_biosdisks[i].bi_dev = big->disk[i].dev;
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i386_alldisks->dl_biosdisks[i].bi_sec = big->disk[i].sec;
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i386_alldisks->dl_biosdisks[i].bi_head = big->disk[i].head;
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i386_alldisks->dl_biosdisks[i].bi_cyl = big->disk[i].cyl;
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i386_alldisks->dl_biosdisks[i].bi_lbasecs = big->disk[i].totsec;
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i386_alldisks->dl_biosdisks[i].bi_flags = big->disk[i].flags;
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}
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/*
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* XXX code duplication from findroot()
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*/
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n = -1;
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for (dv = alldevs.tqh_first; dv != NULL; dv = dv->dv_list.tqe_next) {
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if (dv->dv_class != DV_DISK)
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continue;
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#ifdef GEOM_DEBUG
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printf("matchbiosdisks: trying to match (%s) %s\n",
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dv->dv_xname, dv->dv_cfdata->cf_driver->cd_name);
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#endif
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if (!strcmp(dv->dv_cfdata->cf_driver->cd_name, "sd") ||
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!strcmp(dv->dv_cfdata->cf_driver->cd_name, "wd") ||
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!strcmp(dv->dv_cfdata->cf_driver->cd_name, "ca")) {
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n++;
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sprintf(i386_alldisks->dl_nativedisks[n].ni_devname,
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"%s%d", dv->dv_cfdata->cf_driver->cd_name,
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dv->dv_unit);
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for (d = dev_name2blk; d->d_name &&
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strcmp(d->d_name, dv->dv_cfdata->cf_driver->cd_name);
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d++);
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if (d->d_name == NULL)
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return;
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if (bdevvp(MAKEDISKDEV(d->d_maj, dv->dv_unit, RAW_PART),
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&tv))
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panic("matchbiosdisks: can't alloc vnode");
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error = VOP_OPEN(tv, FREAD, NOCRED, 0);
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if (error) {
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vput(tv);
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continue;
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}
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error = vn_rdwr(UIO_READ, tv, mbr, DEV_BSIZE, 0,
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UIO_SYSSPACE, 0, NOCRED, NULL, 0);
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VOP_CLOSE(tv, FREAD, NOCRED, 0);
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if (error) {
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#ifdef GEOM_DEBUG
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printf("matchbiosdisks: %s: MBR read failure\n",
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dv->dv_xname);
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#endif
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continue;
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}
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for (ck = i = 0; i < DEV_BSIZE; i++)
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ck += mbr[i];
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for (m = i = 0; i < big->num; i++) {
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be = &big->disk[i];
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#ifdef GEOM_DEBUG
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printf("match %s with %d\n", dv->dv_xname, i);
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printf("dev ck %x bios ck %x\n", ck, be->cksum);
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#endif
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if (be->flags & BI_GEOM_INVALID)
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continue;
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if (be->cksum == ck &&
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!memcmp(&mbr[MBR_PARTOFF], be->dosparts,
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NMBRPART *
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sizeof (struct mbr_partition))) {
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#ifdef GEOM_DEBUG
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printf("matched bios disk %x with %s\n",
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be->dev, be->devname);
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#endif
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i386_alldisks->dl_nativedisks[n].
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ni_biosmatches[m++] = i;
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}
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}
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i386_alldisks->dl_nativedisks[n].ni_nmatches = m;
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vput(tv);
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}
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}
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}
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#ifdef COMPAT_OLDBOOT
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u_long bootdev = 0; /* should be dev_t, but not until 32 bits */
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#endif
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/*
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* helper function for "findroot()":
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* return nonzero if disk device matches bootinfo
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*/
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static int
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match_harddisk(dv, bid)
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struct device *dv;
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struct btinfo_bootdisk *bid;
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{
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struct devnametobdevmaj *i;
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struct vnode *tmpvn;
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int error;
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struct disklabel label;
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int found = 0;
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/*
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* A disklabel is required here. The
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* bootblocks don't refuse to boot from
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* a disk without a label, but this is
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* normally not wanted.
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*/
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if (bid->labelsector == -1)
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return(0);
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/*
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* lookup major number for disk block device
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*/
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i = dev_name2blk;
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while (i->d_name &&
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strcmp(i->d_name, dv->dv_cfdata->cf_driver->cd_name))
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i++;
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if (i->d_name == NULL)
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return(0); /* XXX panic() ??? */
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/*
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* Fake a temporary vnode for the disk, open
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* it, and read the disklabel for comparison.
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*/
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if (bdevvp(MAKEDISKDEV(i->d_maj, dv->dv_unit, bid->partition), &tmpvn))
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panic("findroot can't alloc vnode");
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error = VOP_OPEN(tmpvn, FREAD, NOCRED, 0);
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if (error) {
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#ifndef DEBUG
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/*
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* Ignore errors caused by missing
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* device, partition or medium.
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*/
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if (error != ENXIO && error != ENODEV)
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#endif
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printf("findroot: can't open dev %s%c (%d)\n",
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dv->dv_xname, 'a' + bid->partition, error);
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vput(tmpvn);
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return(0);
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}
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error = VOP_IOCTL(tmpvn, DIOCGDINFO, (caddr_t)&label, FREAD, NOCRED, 0);
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if (error) {
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/*
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* XXX can't happen - open() would
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* have errored out (or faked up one)
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*/
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printf("can't get label for dev %s%c (%d)\n",
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dv->dv_xname, 'a' + bid->partition, error);
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goto closeout;
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}
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/* compare with our data */
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if (label.d_type == bid->label.type &&
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label.d_checksum == bid->label.checksum &&
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!strncmp(label.d_packname, bid->label.packname, 16))
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found = 1;
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closeout:
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VOP_CLOSE(tmpvn, FREAD, NOCRED, 0);
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vput(tmpvn);
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return(found);
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}
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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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struct btinfo_bootdisk *bid;
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struct device *dv;
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#ifdef COMPAT_OLDBOOT
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int i, majdev, unit, part;
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char buf[32];
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#endif
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if (booted_device)
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return;
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if (lookup_bootinfo(BTINFO_NETIF)) {
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/*
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* We got netboot interface information, but
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* "device_register()" couldn't match it to a configured
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* device. Bootdisk information cannot be present at the
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* same time, so give up.
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*/
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printf("findroot: netboot interface not found\n");
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return;
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}
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bid = lookup_bootinfo(BTINFO_BOOTDISK);
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if (bid) {
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/*
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* Scan all disk devices for ones that match the passed data.
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* Don't break if one is found, to get possible multiple
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* matches - for problem tracking. Use the first match anyway
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* because lower device numbers are more likely to be the
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* boot device.
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*/
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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 (dv->dv_class != DV_DISK)
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continue;
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if (!strcmp(dv->dv_cfdata->cf_driver->cd_name, "fd")) {
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/*
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* Assume the configured unit number matches
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* the BIOS device number. (This is the old
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* behaviour.) Needs some ideas how to handle
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* BIOS's "swap floppy drive" options.
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*/
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if ((bid->biosdev & 0x80) ||
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dv->dv_unit != bid->biosdev)
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continue;
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goto found;
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}
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if (!strcmp(dv->dv_cfdata->cf_driver->cd_name, "sd") ||
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!strcmp(dv->dv_cfdata->cf_driver->cd_name, "wd") ||
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!strcmp(dv->dv_cfdata->cf_driver->cd_name, "ca")) {
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/*
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* Don't trust BIOS device numbers, try
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* to match the information passed by the
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* bootloader instead.
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*/
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if ((bid->biosdev & 0x80) == 0 ||
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!match_harddisk(dv, bid))
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continue;
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goto found;
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}
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/* no "fd", "wd", "sd" or "ca" */
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continue;
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found:
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if (booted_device) {
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printf("warning: double match for boot "
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"device (%s, %s)\n", booted_device->dv_xname,
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dv->dv_xname);
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continue;
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}
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booted_device = dv;
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booted_partition = bid->partition;
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}
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if (booted_device)
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return;
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}
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#ifdef COMPAT_OLDBOOT
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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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#endif
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}
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#include "pci.h"
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#include <dev/isa/isavar.h>
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#if NPCI > 0
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#include <dev/pci/pcivar.h>
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#endif
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void
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device_register(dev, aux)
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struct device *dev;
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void *aux;
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{
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/*
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* Handle network interfaces here, the attachment information is
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* not available driver independantly later.
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* For disks, there is nothing useful available at attach time.
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*/
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if (dev->dv_class == DV_IFNET) {
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struct btinfo_netif *bin = lookup_bootinfo(BTINFO_NETIF);
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if (bin == NULL)
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return;
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/*
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* We don't check the driver name against the device name
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* passed by the boot ROM. The ROM should stay usable
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* if the driver gets obsoleted.
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* The physical attachment information (checked below)
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* must be sufficient to identify the device.
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*/
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if (bin->bus == BI_BUS_ISA &&
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!strcmp(dev->dv_parent->dv_cfdata->cf_driver->cd_name,
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"isa")) {
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struct isa_attach_args *iaa = aux;
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/* compare IO base address */
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if (bin->addr.iobase == iaa->ia_iobase)
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goto found;
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}
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#if NPCI > 0
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if (bin->bus == BI_BUS_PCI &&
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!strcmp(dev->dv_parent->dv_cfdata->cf_driver->cd_name,
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"pci")) {
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struct pci_attach_args *paa = aux;
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int b, d, f;
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/*
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* Calculate BIOS representation of:
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*
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* <bus,device,function>
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*
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* and compare.
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*/
|
|
pci_decompose_tag(paa->pa_pc, paa->pa_tag, &b, &d, &f);
|
|
if (bin->addr.tag == ((b << 8) | (d << 3) | f))
|
|
goto found;
|
|
}
|
|
#endif
|
|
}
|
|
return;
|
|
|
|
found:
|
|
if (booted_device) {
|
|
/* XXX should be a "panic()" */
|
|
printf("warning: double match for boot device (%s, %s)\n",
|
|
booted_device->dv_xname, dev->dv_xname);
|
|
return;
|
|
}
|
|
booted_device = dev;
|
|
}
|