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<?xml version='1.0' encoding='UTF-8'?>
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<!DOCTYPE sections SYSTEM "/dtd/book.dtd">
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<!-- The content of this document is licensed under the CC-BY-SA license -->
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<!-- See http://creativecommons.org/licenses/by-sa/1.0 -->
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<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-mips-bootloader.xml,v 1.5 2004/10/23 11:02:06 swift Exp $ -->
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<sections>
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<version>1.5</version>
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<date>October 23, 2004</date>
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<section>
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<title>The MIPS PROM</title>
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<subsection>
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<body>
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<p>
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MIPS doesn't require that you install a bootloader. The MIPS PROM handles the
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booting, but you need to install your kernel as a viable option.
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</p>
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<p>
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First, install <c>dvhtool</c>, needed to copy the kernel to the SGI Volume
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Header.
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</p>
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<pre caption="Installing dvhtool">
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# <i>emerge dvhtool</i>
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</pre>
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<p>
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Now copy over the kernel to the SGI Volume Header. By default <c>dvhtool</c>
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assumes that the SGI Volume Header is on <path>/dev/sda</path>. If this is not
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the case (for instance when IRIX is installed on <path>/dev/sda</path> and
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Gentoo/MIPS on <path>/dev/sdb</path>) you need to inform <c>dvhtool</c> about it
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using <c>-d <device></c>.
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</p>
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<pre caption="Copying a kernel to the SGI Volume Header">
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# <i>dvhtool --unix-to-vh <kernel name in /boot> <name you want to give in volume header></i>
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</pre>
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<p>
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If you want to see all available entries in the volume, use
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<c>--print-volume-directory</c>:
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</p>
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<pre caption="Viewing all available entries in the volume">
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# <i>dvhtool --print-volume-directory</i>
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</pre>
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<p>
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To set up your system to boot Gentoo/MIPS you need to go tweak some settings in
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the MIPS PROM.
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</p>
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<p>
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Continue with <uri link="#reboot">Rebooting the System</uri>.
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</p>
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</body>
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</subsection>
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</section>
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<section id="reboot">
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<title>Rebooting the System</title>
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<subsection>
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<body>
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<p>
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Exit the chrooted environment and unmount all mounted partitions. Then type in
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that one magical command you have been waiting for: <c>reboot</c>.
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</p>
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<pre caption="Exiting the chroot, unmounting all partitions and rebooting">
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# <i>exit</i>
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cdimage ~# <i>cd</i>
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cdimage ~# <i>umount /mnt/gentoo/boot /mnt/gentoo/proc /mnt/gentoo</i>
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cdimage ~# <i>reboot</i>
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</pre>
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</body>
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</subsection>
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</section>
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<section>
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<title>Tweaking the MIPS PROM</title>
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<subsection>
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<body>
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<p>
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When you are rebooted, go to the <e>System Maintenance Menu</e> and select
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<e>Enter Command Monitor</e> (<c>5</c>). If you want to test your new Gentoo
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installation, you can just run <c>boot -f <kernel name></c>. To have your
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system permanently boot into the Gentoo installation, you need to set some
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variables in the MIPS PROM:
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</p>
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<pre caption="Configuring the PROM to Boot Gentoo">
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1) Start System
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2) Install System Software
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3) Run Diagnostics
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4) Recover System
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5) Enter Command Monitor
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Option? <i>5</i>
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Command Monitor. Type "exit" to return to the menu.
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<comment>(<root device> = Gentoo's root partition, e.g. /dev/sda3)</comment>
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>> <i>setenv OSLoadPartition <root device></i>
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<comment>(To list the available kernels, type "ls")</comment>
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>> <i>setenv OSLoader <kernel name></i>
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>> <i>setenv OSLoadFilename <kernel name></i>
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<comment>(Declare the kernel parameters you want to pass)</comment>
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>> <i>setenv OSLoadOptions <kernel parameters></i>
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<comment>(Provide the location of the Volume Header)</comment>
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>> <i>setenv SystemPartition scsi(0)disk(1)rdisk(0)partition(8)</i>
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<comment>(Automatically boot Gentoo)</comment>
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>> <i>setenv AutoLoad Yes</i>
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<comment>(Set the timezone)</comment>
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>> <i>setenv TimeZone EST5EDT</i>
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<comment>(Use the serial console - graphic adapter users should have "g" instead of "d1" (one))</comment>
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>> <i>setenv console d1</i>
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</pre>
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<p>
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Now you're ready to enjoy Gentoo! Boot in your Gentoo installation and finish
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up with <uri link="?part=1&chap=11">Finalizing your Gentoo
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Installation</uri>.
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</p>
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</body>
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</subsection>
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</section>
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</sections>
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