b54e59b479
need this RSN. Remove a pointless warning in the root device locating code. Remove the "wd" compatibility name from the "ad" driver. WARNING: If you have not updated to use /dev/wd* in your /etc/fstab and modern bootblocks, it would be a very good idea to do so BEFORE you upgrade your kernel.
325 lines
9.1 KiB
C
325 lines
9.1 KiB
C
/*-
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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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* from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91
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* $FreeBSD$
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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_bootp.h"
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#include "opt_ffs.h"
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#include "opt_cd9660.h"
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#include "opt_nfs.h"
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#include "opt_nfsroot.h"
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#include "opt_bus.h"
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#include "opt_rootdevname.h"
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#include "isa.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#include <sys/reboot.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/cons.h>
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#include <machine/bootinfo.h>
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#include <machine/ipl.h>
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#include <machine/md_var.h>
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#ifdef APIC_IO
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#include <machine/smp.h>
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#else
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#include <i386/isa/icu.h>
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#endif /* APIC_IO */
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#if NISA > 0
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#include <isa/isavar.h>
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device_t isa_bus_device = 0;
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#endif
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static void configure_first __P((void *));
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static void configure __P((void *));
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static void configure_final __P((void *));
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#if defined(FFS) && defined(FFS_ROOT)
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static void setroot __P((void));
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#endif
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SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
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/* SI_ORDER_SECOND is hookable */
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SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
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/* SI_ORDER_MIDDLE is hookable */
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SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
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dev_t rootdev = NODEV;
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dev_t dumpdev = NODEV;
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device_t nexus_dev;
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/*
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* Determine i/o configuration for a machine.
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*/
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static void
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configure_first(dummy)
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void *dummy;
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{
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}
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static void
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configure(dummy)
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void *dummy;
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{
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/*
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* Activate the ICU's. Note that we are explicitly at splhigh()
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* at present as we have no way to disable stray PCI level triggered
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* interrupts until the devices have had a driver attached. This
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* is particularly a problem when the interrupts are shared. For
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* example, if IRQ 10 is shared between a disk and network device
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* and the disk device generates an interrupt, if we "activate"
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* IRQ 10 when the network driver is set up, then we will get
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* recursive interrupt 10's as nothing will know how to turn off
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* the disk device's interrupt.
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*
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* Having the ICU's active means we can probe interrupt routing to
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* see if a device causes the corresponding pending bit to be set.
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*
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* This is all rather inconvenient.
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*/
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#ifdef APIC_IO
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bsp_apic_configure();
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enable_intr();
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#else
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enable_intr();
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INTREN(IRQ_SLAVE);
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#endif /* APIC_IO */
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/* nexus0 is the top of the i386 device tree */
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device_add_child(root_bus, "nexus", 0);
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/* initialize new bus architecture */
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root_bus_configure();
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#if NISA > 0
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/*
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* Explicitly probe and attach ISA last. The isa bus saves
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* it's device node at attach time for us here.
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*/
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if (isa_bus_device)
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isa_probe_children(isa_bus_device);
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#endif
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/*
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* Now we're ready to handle (pending) interrupts.
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* XXX this is slightly misplaced.
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*/
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spl0();
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/*
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* Allow lowering of the ipl to the lowest kernel level if we
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* panic (or call tsleep() before clearing `cold'). No level is
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* completely safe (since a panic may occur in a critical region
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* at splhigh()), but we want at least bio interrupts to work.
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*/
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safepri = cpl;
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}
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static void
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configure_final(dummy)
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void *dummy;
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{
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int i;
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cninit_finish();
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if (bootverbose) {
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#ifdef APIC_IO
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imen_dump();
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#endif /* APIC_IO */
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/*
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* Print out the BIOS's idea of the disk geometries.
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*/
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printf("BIOS Geometries:\n");
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for (i = 0; i < N_BIOS_GEOM; i++) {
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unsigned long bios_geom;
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int max_cylinder, max_head, max_sector;
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bios_geom = bootinfo.bi_bios_geom[i];
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/*
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* XXX the bootstrap punts a 1200K floppy geometry
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* when the get-disk-geometry interrupt fails. Skip
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* drives that have this geometry.
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*/
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if (bios_geom == 0x4f010f)
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continue;
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printf(" %x:%08lx ", i, bios_geom);
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max_cylinder = bios_geom >> 16;
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max_head = (bios_geom >> 8) & 0xff;
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max_sector = bios_geom & 0xff;
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printf(
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"0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
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max_cylinder, max_cylinder + 1,
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max_head, max_head + 1,
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max_sector, max_sector);
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}
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printf(" %d accounted for\n", bootinfo.bi_n_bios_used);
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printf("Device configuration finished.\n");
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}
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cold = 0;
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}
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#ifdef BOOTP
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extern void bootpc_init(void);
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#endif
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/*
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* Do legacy root filesystem discovery.
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*/
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void
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cpu_rootconf()
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{
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#ifdef BOOTP
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bootpc_init();
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#endif
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#if defined(NFS) && defined(NFS_ROOT)
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#if !defined(BOOTP_NFSROOT)
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if (nfs_diskless_valid)
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#endif
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rootdevnames[0] = "nfs:";
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#endif
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#if defined(FFS) && defined(FFS_ROOT)
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if (!rootdevnames[0])
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setroot();
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#endif
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}
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SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
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u_long bootdev = 0; /* not a dev_t - encoding is different */
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#if defined(FFS) && defined(FFS_ROOT)
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#define FDMAJOR 2
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#define FDUNITSHIFT 6
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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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* set rootdevs[] and rootdevnames[] to correspond to the
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* boot device(s).
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*
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* This code survives in order to allow the system to be
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* booted from legacy environments that do not correctly
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* populate the kernel environment. There are significant
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* restrictions on the bootability of the system in this
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* situation; it can only be mounting root from a 'da'
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* 'wd' or 'fd' device, and the root filesystem must be ufs.
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*/
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static void
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setroot()
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{
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int majdev, mindev, unit, slice, part;
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dev_t newrootdev, dev;
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char partname[2];
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char *sname;
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if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
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printf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
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return;
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}
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majdev = B_TYPE(bootdev);
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dev = makebdev(majdev, 0);
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if (devsw(dev) == NULL)
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return;
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unit = B_UNIT(bootdev);
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slice = B_SLICE(bootdev);
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if (slice == WHOLE_DISK_SLICE)
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slice = COMPATIBILITY_SLICE;
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if (slice < 0 || slice >= MAX_SLICES) {
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printf("bad slice\n");
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return;
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}
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/*
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* XXX kludge for inconsistent unit numbering and lack of slice
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* support for floppies.
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*/
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if (majdev == FDMAJOR) {
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slice = COMPATIBILITY_SLICE;
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part = RAW_PART;
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mindev = unit << FDUNITSHIFT;
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} else {
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part = B_PARTITION(bootdev);
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mindev = dkmakeminor(unit, slice, part);
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}
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newrootdev = makebdev(majdev, mindev);
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sname = dsname(newrootdev, unit, slice, part, partname);
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rootdevnames[0] = malloc(strlen(sname) + 6, M_DEVBUF, M_NOWAIT);
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sprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
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/*
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* For properly dangerously dedicated disks (ones with a historical
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* bogus partition table), the boot blocks will give slice = 4, but
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* the kernel will only provide the compatibility slice since it
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* knows that slice 4 is not a real slice. Arrange to try mounting
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* the compatibility slice as root if mounting the slice passed by
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* the boot blocks fails. This handles the dangerously dedicated
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* case and perhaps others.
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*/
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if (slice == COMPATIBILITY_SLICE)
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return;
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slice = COMPATIBILITY_SLICE;
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sname = dsname(newrootdev, unit, slice, part, partname);
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rootdevnames[1] = malloc(strlen(sname) + 6, M_DEVBUF, M_NOWAIT);
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sprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
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}
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#endif
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