154 lines
4.8 KiB
Groff
154 lines
4.8 KiB
Groff
.\" Copyright (c) 1986, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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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.4 8.1 (Berkeley) 6/5/93
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.\"
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.Dd June 5, 1993
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.Dt AUTOCONF 4 tahoe
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.Os BSD 4.3t
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.Sh NAME
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.Nm autoconf
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.Nd diagnostics from autoconfiguration code
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.Sh DESCRIPTION
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When
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.Tn UNIX
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bootstraps it probes the innards of the machine it is running
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on and locates controllers, drives, and other devices, printing out
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what it finds on the console. This procedure is driven by a system
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configuration table which is processed by
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.Xr config 8
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and compiled into each kernel.
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.Pp
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.Tn VERSAbus
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devices are located by probing to see if their control-status
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registers respond. If not, they are silently ignored. If the control
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status register responds but the device cannot be made to interrupt,
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a diagnostic warning will be printed on the console and the device
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will not be available to the system.
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.Pp
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A generic system may be built which picks its root device at boot time
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as the
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.Dq best
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available device.
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If such a system is booted with the
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.Dv RB_ASKNAME
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option of (see
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.Xr reboot 2 ) ,
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then the name of the root device is read from the console terminal at boot
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time, and any available device may be used.
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.Sh DIAGNOSTICS
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.Bl -diag
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.It vba%d at %x.
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A
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.Tn VERSAbus
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adapter was found and mapped into the
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address space of the operating system starting at virtual address
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.Sq Li %x .
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.Tn UNIX
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will call it
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.Sq Li vba%d .
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.It %s%d at vba%d drive %d.
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A tape formatter or a disk was found
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on the
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.Tn VERSAbus ;
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for disks
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.Sq Li %s%d
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will look like
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.Sq Li dk0 ,
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for tape formatters
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like
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.Sq Li yc1 .
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The drive number comes from the unit plug on the drive
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or in the tape formatter
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.Pf ( Em not
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on the tape drive; see below).
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.It %s%d at %s%d slave %d.
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Which would look like
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.Sq Li yc0 at cy0 slave 0% ,
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where
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.Em yc0
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is the name for the tape device and
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.Em cy0
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is the name
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for the formatter. A tape slave was found on the tape formatter at the
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indicated drive number (on the front of the tape drive).
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.Tn UNIX
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will call the device, e.g.,
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.Li cy0.
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.It %s%d at vba%d csr %x vec %x ipl %x.
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The device
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.Sq Li %s%d ,
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e.g.
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.Sq Li vd0
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was found on
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.Sq Li vba%d
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at control-status register address
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.Sq Li %x
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and with
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device vector
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.Sq Li %x .
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The device interrupted at priority level
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.Sq Li %x .
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.It %s%d at vba%d csr %x no interrupts.
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The device was found
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on
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.Sq Li vba%d
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at control-status register address
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.Sq Li %x ;
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no
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interrupts were configured for the device.
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.It %s%d at vba%d csr %x didn't interrupt.
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The device did not interrupt,
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likely because it is broken, hung, or not the kind of device it is advertised
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to be. The csr address is interpreted as described above.
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.It %s%d at %s%d slave %d.
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Which would look like
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.Sq Li dk0 at vd0 slave 0 ,
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where
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.Em dk0
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is the name of a disk drive and
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.Em vd0
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is the name
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of the controller.
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.El
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.Sh SEE ALSO
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.Xr config 8
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.Sh HISTORY
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The
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.Nm
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special file appeared in
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.Bx 4.3 tahoe .
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.Sh BUGS
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Very few devices actually figure out their interrupt vector
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by forcing the device to interrupt. Only the upper megabyte of the
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.Tn VERSAbus
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address space is mapped into the system's virtual address space.
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