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-.\"	$OpenBSD: boot.8,v 1.9 2019/01/02 21:20:41 anton Exp $
-.\"
-.\" Copyright (c) 1997-2001 Michael Shalayeff
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-.\" IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
-.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-.\" SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-.\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
-.\" THE POSSIBILITY OF SUCH DAMAGE.
-.\"
-.\"
-.Dd $Mdocdate: January 2 2019 $
-.Dt BOOT 8 socppc
-.Os
-.Sh NAME
-.Nm boot ,
-.Nm boot.conf
-.Nd socppc-specific bootstrap
-.Sh DESCRIPTION
-The main purpose of this program is to load the system kernel.
-.Pp
-This program is loaded by the
-firmware
-and provides a convenient way to load the kernel.
-This program acts as an enhanced boot monitor for socppc systems, providing
-a common interface for the kernel to start from.
-.Pp
-Basic operations include:
-.Pp
-.Bl -bullet -compact
-.It
-Loading kernels from hard disk.
-.It
-Loading kernels compressed by
-.Xr gzip 1 .
-.It
-Providing an interactive command line.
-.El
-.Pp
-The sequence of its operation is as follows: initialization,
-parsing the configuration file, then an interactive command line.
-While at the command line you have 5 seconds to type any commands, if needed.
-If time expires, the kernel will be loaded according to
-the current variable settings (see the
-.Ic set
-command).
-Each time a kernel load fails, the timeout is increased by one second.
-The sequence of
-.Nm
-operations is as follows:
-.Bl -enum
-.It
-If the file
-.Pa /etc/boot.conf
-.\" XXX BEWARE! wd0 only, so text change...
-.\" exists on the filesystem
-.\" .Nm
-.\" was loaded from, open and parse it.
-exists on the filesystem in slice
-.Sq a
-on the first disk drive
-.Pq wd0 ,
-open and parse it.
-Lines beginning with the
-.Sq #
-character,
-as well as whitespace at the beginning of lines,
-are ignored.
-The file may contain any commands
-.Nm
-accepts at the interactive prompt.
-Though default settings usually suffice, they can be changed here.
-.\" XXX CHECK_SKIP_CONF is not defined...
-.\" .Pp
-.\" .Pa boot.conf
-.\" processing can be skipped by holding down either Control key as
-.\" .Nm
-.\" starts.
-.It
-The header line
-.Pp
-.Dl >> OpenBSD/socppc BOOT [x.xx]
-.Pp
-is displayed to the active console, where
-.Ar x.xx
-is the version number of the
-.Nm
-program, followed by the
-.Pp
-.Dl boot>
-.Pp
-prompt, which means you are in interactive mode and may enter commands.
-If you do not,
-.Nm
-will proceed to load the kernel with the current parameters after the
-timeout period has expired.
-.El
-.Pp
-By default,
-.Nm
-attempts to load the kernel executable
-.Pa /bsd .
-If it fails to find the kernel and no alternative kernel image has
-been specified, the system will be unable to boot.
-.Sh COMMANDS
-The following commands are accepted at the
-.Nm
-prompt:
-.Bl -tag -width shorten
-.It Ic boot Oo Oo Ar device : Oc Ns Ar image Oc Op Fl acds
-Boots the specified kernel image
-with any options given.
-If
-.Ar device
-or
-.Ar image
-are omitted, values from
-.Nm
-variables will be used.
-.Pp
-The only bootable devices, at the moment, are IDE devices connected to
-the internal controller;
-they are detected as
-.Sq wd
-devices.
-Therefore, to boot kernel
-.Pa /bsd
-from slice
-.Sq a
-on the first hard drive,
-specify
-.Dq boot wd0a:/bsd .
-.Bl -tag -width _a_
-.It Fl a
-Causes the kernel to ask for the
-.Nm root
-device to use.
-.It Fl c
-Causes the kernel to go into
-.Xr boot_config 8
-before performing
-.Xr autoconf 4
-procedures.
-.It Fl d
-Causes the kernel to drop into
-.Xr ddb 4
-at the earliest convenient point.
-.It Fl s
-Causes the kernel to boot single-user.
-.El
-.It Ic echo Op Ar args
-Displays
-.Ar args
-on the console device.
-.It Ic help
-Prints a list of available commands.
-.It Ic ls Op Ar directory
-Prints contents of the specified
-.Ar directory
-in long format including: attributes and file type, owner, group,
-size, filename.
-.It Ic reboot
-Reboots the machine by initiating a warm boot procedure.
-.It Ic set Op Ar varname Op Ar value
-If invoked without arguments, prints a list of variables and their values.
-If only
-.Ar varname
-is specified, displays contents of that variable.
-If
-.Ar varname
-and
-.Ar value
-are both specified, sets that variable to the given value.
-Variables include:
-.Pp
-.Bl -tag -compact -width boothow
-.It Ic addr
-Address at which to load the kernel.
-.It Ic debug
-Debug flag if
-.Nm
-was compiled with DEBUG defined.
-.It Ic device
-Boot device name (e.g.,
-.Li wd0a ,
-.Li wd1a ) .
-.It Ic howto
-Options to pass to the loaded kernel.
-.It Ic image
-File name containing the kernel image.
-.It Ic timeout
-Number of seconds boot will wait for human intervention before
-booting the default kernel image.
-.\" .It Nm tty
-.\" Active console device name (e.g.,
-.\" .Li com0 ) .
-.\" Currently, only the first serial port
-.\" .Pq Li com0
-.\" is supported for console on socppc.
-.El
-.\" XXX ignored, so don't document it.
-.\" .It stty Op Ar device Op Ar speed
-.\" Displays or sets the
-.\" .Ar speed
-.\" for a console
-.\" .Ar device .
-.\" If changing the baudrate for the currently active console,
-.\" .Nm
-.\" offers you five seconds of grace time before committing the change
-.\" to allow you to change your terminal's speed to match.
-.\" If changing speed
-.\" .Em not
-.\" for the active console, the baudrate is set for the
-.\" .Em next
-.\" time you switch to a serial console.
-.\" .Pp
-.\" The default baudrate is 9600bps.
-.It Ic time
-Displays system time and date.
-.El
-.Sh FILES
-.Bl -tag -width /etc/boot.conf -compact
-.It Pa /usr/mdec/boot
-system bootstrap
-.It Pa /etc/boot.conf
-system bootstrap's startup file
-.It Pa /bsd
-kernel image
-.It Pa /bsd.rd
-kernel image for installation/recovery
-.El
-.Sh EXAMPLES
-Boot the default kernel:
-.Pp
-.Dl boot> boot
-.Pp
-Remove the 5 second pause at boot-time permanently, causing
-.Nm
-to load the kernel immediately without prompting:
-.Pp
-.Dl # echo \&"boot\&" > /etc/boot.conf
-.Pp
-Boot the kernel named
-.Pa /bsd
-from the second hard disk in
-.Dq User Kernel Configuration
-mode (see
-.Xr boot_config 8 ) .
-This mechanism allows for the explicit enabling and disabling of devices
-during the current boot sequence, as well as the modification
-of device parameters.
-Once booted, such changes can be made permanent by using
-.Xr config 8 Ns 's
-.Fl e
-option.
-.Pp
-.Dl boot> boot wd1a:/bsd -c
-.Sh SEE ALSO
-.Xr gzip 1 ,
-.Xr autoconf 4 ,
-.Xr ddb 4 ,
-.Xr boot_config 8 ,
-.Xr fdisk 8 ,
-.Xr reboot 8
-.Sh HISTORY
-This program was written by Michael Shalayeff for
-.Ox 2.1
-on the i386 platform, and was later ported to the socppc platform for
-.Ox 4.4 .