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Diffstat (limited to 'sys/arch/i386/stand/boot/boot.8')
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diff --git a/sys/arch/i386/stand/boot/boot.8 b/sys/arch/i386/stand/boot/boot.8 index e69de29bb2d..e48635a0c07 100644 --- a/sys/arch/i386/stand/boot/boot.8 +++ b/sys/arch/i386/stand/boot/boot.8 @@ -0,0 +1,205 @@ +.\" $OpenBSD: boot.8,v 1.2 1997/09/05 18:08:05 mickey Exp $ +.\" +.\" Copyright (c) 1997 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. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by Michael Shalayeff. +.\" 4. The name of the author may not be used to endorse or promote products +.\" derived from this software without specific prior written permission. +.\" +.\" 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 REGENTS OR CONTRIBUTORS 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 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 September 1, 1997 +.Dt BOOT 8 i386 +.Os +.Sh NAME +.Nm boot +.Nd +secondary system bootstrap program +.Sh DESCRIPTION +The main purpose of this program is to load system kernel dealing with +all the bugs and bottlenecks of the PC hardware and it's way of design. +.Pp +As described in the +.Xr boot_i386 8 +this program is loaded by the +.Xr biosboot 8 +primary bootstrap loader and will give you convinient way to load kernel. +.Pp +Basic operations include: +.Bl -bullet -compact +.It +Detecting and switching between multiple consoles. +.It +Loading kernel from any device supported by your system BIOS. +.It +Loading kernels compressed by +.Xr gzip 1 +program or +.Xr zlib +routines. +.It +Passing system parameters queried from BIOS to the kernel. +.It +Providing interactive command line. +.El +.Pp +The sequence of it's operation consists of initialization +followed by interactive command line. While in the command +line you have a timeout of 5 seconds (initially, then increasing +by one second on every consequent kernel loading failure) +to type any commands if needed. Upon timeout expiration +kernel will be loaded according to the current variables +settings (See +.Nm set +command for details). +The sequence of +.Nm +operations is like follows: +.Bl -enum +.It +Setup protected mode involving IDT setup for processor exceptions to +be caught and reported and simple real-mode BIOS interface provided. +.It +Probe for console devices, which involves PC internal VGA+keyboard +console and serial console over any of four serial ports. Correspondent +messages reports about found devices to the default console device, +which is pc0, if present. +.It +Probe for memory. Conventional memory probed by quering the BIOS. +Extended memory probed by running through the memory probing +for present pages, which elliminates BIOS restriction for 64M of memory. +found memory is reported as well to the default console device. +.It +Probe for APM support in BIOS. Message printed if support is present. +.It +Open, and if successfull, process +.Pa /etc/boot.conf +file on the same filesystem +.Nm +was loaded from. This file may contain any commands +.Nm +accepts at the interactive prompt. +Ussually they are commands that changes boot parameters according to your +environment, although default values are usable in most cases. +.It +Header line +.Pp +.Dl OpenBSD BOOT [x.xx] +.Pp +is displayed to the active console, where +.Ar x.xx +is a version number of the +.Nm +program, followed by the +.Pp +.Dl boot> +.Pp +prompt, which means you are in the interactive mode and may enter +commands. If you won't, +.Nm +will proceed loading kernel w/ default parameters. +.El +.Sh COMMANDS +The following commands are accepted at the +.Nm +prompt: +.Bl -tag -width machine_diskinfo_boot_ +.It boot Op Ar image Op Fl abcds +Boots kernel image specified by the +.Ar image +with options if any. Image specification consists of a pair +.Nm device : Nm filename , +either of each maybe omitted (':' is not needed if both) +in wich case values from +.Nm +variables will be used. +.It echo +Prints it's arguments. +.It help +Prints a list of available commands and machine dependant +commands, if any. +.It machine Op Ar subcommand +Issues machine-dependant commands. These are defined for i386 architecture: +.Bl -tag -width diskinfo_ +.It diskinfo +Prints list of hard disks installed on your system including: +BIOS device number, BIOS translated geometry. +.El +.It ls Op Ar directory +Prints contents of the specified +.Ar directory +in long format including: file type and attributes, owner, group, +size, and ilename. +.It regs +Prints contents of processor registers, if defined for this architecture. +.It reboot +Reboots machine by initiating a warm boot procedure. +.It set Op varname Op value +If invoked without arguments will print list of variables with values. +If +.Ar varname +and +.Ar value +present will set variable with that name to the given value. +Variables include: +.Bl -tag -compact -width boothow +.It addr +Address at wich to load the kernel. +.It howto +Options to pass to the loaded kernel. +.It debug +Debug flag if compiled w/ DEBUG defined. +.It device +Boot device name (ie fd0a, sd0a). +.It tty +Active console device name. +.It image +File name containing the kernel image. +.El +.It time +Displays system time and date. +.El +.Sh FILES +.Bl -tag -width /usr/mdec/biosbootxx -compact +.It Pa /usr/mdec/biosboot +primary bootstrap +.It Pa /boot +system bootstrap +.It Pa /etc/boot.conf +system bootstrap's startup file +.It Pa /bsd +system code +.El +.Sh SEE ALSO +.Xr boot_i386 8 , +.Xr fdisk 8 , +.Xr installboot 8 , +.Xr boot 8 , +.Xr gzip 1 , +.%B http://quest.jpl.nasa.gov/zlib/ . +.Sh BUGS +Well, nobody is perfect. +.Sh HISTORY +This program was written by Michael Shalayeff for +.Ox 2.1 . |