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+.\" $NetBSD: boot.8,v 1.2 2013/10/05 08:20:22 skrll Exp $
+.\"
+.\" Copyright (c) 2010 Microsoft Corp.
+.\" Copyright (c) 2010 NetBSD Foundation, Inc.
+.\" 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 REGENTS AND CONTRIBUTORS ``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 October 5, 2013
+.Dt BOOT 8 emips
+.Os
+.Sh NAME
+.Nm boot
+.Nd system bootstrapping procedures
+.Sh DESCRIPTION
+The
+.Nx
+kernel is started by placing it near the beginning of physical
+memory and transferring to the entry point.
+Since the system is not reenterable,
+it is necessary to read it in from disk or the network
+each time it is to be bootstrapped.
+.Ss Power fail and crash recovery
+FPGA devices lose their content upon loss of power and must be re-programmed.
+This is usually accomplished via a JTAG cable programmer, or using a FLASH device.
+Once the eMIPS processor has been programmed into the FPGA, the system will normally boot itself.
+An automatic consistency check of the file systems will be performed,
+and unless this fails, the system will resume multi-user operations.
+.Sh Xilinx XUP, ML401 and ML402
+On these systems the kernel is normally read in from disk. The path used for automatic booting is
+.Nm /netbsd ,
+but it can be overridden in the optional file
+.Nm /boot.config
+stored in the root of the disk filesystem. The user can also type a different filename and a combination of boot options.
+.Sh BeSquare BEE3
+On this system there is no local disk and booting over the network is the only option.
+Network boot can also be explicitly selected by hitting
+.Nm f
+at the boot loader prompt.
+.Sh KERNEL ARGUMENTS
+At the boot loader prompt, the user may boot
+.Nx
+with a number of options that are passed to the kernel unmodified. Parsing of these options is
+defined in the file
+.Nm /sys/boot_flag.h
+Some additional flags are as follows.
+.Bl -tag -width xxx -offset indent
+.It Li e
+Empty -- this argument requests
+.Nx
+to ignore all symbolic information and empty its initial symbol table.
+.It Li n
+Name -- Prompt for the root file system device, the system crash dump
+device, and the path to
+.Xr init 8 .
+.It Li N
+NoName -- Do not prompt for the root file system device, the system crash dump
+device, and the path to
+.Xr init 8 .
+If the configured-in devices are present, use them.
+.It Li s
+Single -- Boot only to single-user mode.
+.El
+.Sh SEE ALSO
+.Xr ddb 4 ,
+.Xr halt 8 ,
+.Xr init 8 ,
+.Xr installboot 8 ,
+.Xr rc 8 ,
+.Xr reboot 8 ,
+.Xr savecore 8 ,
+.Xr shutdown 8
+.Sh HISTORY
+The
+.Nm
+command is
+.Ud .