Add documentation for u-boot patches to 2009.01-rc1

author: Ulf Samuelsson <ulf.samuelsson@atmel.com> 2009-01-06 16:30:32 +0000
committer: Ulf Samuelsson <ulf.samuelsson@atmel.com> 2009-01-06 16:30:32 +0000
commit: f53a437e4ec287780fda14ea8de48c212f04872f (patch)
tree: b52b3e7b18f11d22b51088f7e716cb019fb52552 /docs
parent: 0082e57f169f868ac3d475b5edfe2e05cee1f88c (diff)
1 files changed, 255 insertions, 0 deletions
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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+	<title>Buildroot - U-boot extensions in 2009.01-rc1</title>
+	<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
+	<link rel="stylesheet" type="text/css" href="stylesheet.css" />
+</head>
+
+<body>
+	<div class="main">
+	<div class="titre">
+	<a name="top" id="top"></a>
+	<h1>U-boot extensions in 2009.01-rc1</h1>
+	</div>
+
+	<p><a href="http://buildroot.uclibc.org/">U-Boot</a>
+	usage and documentation by Ulf Samuelsson.
+	</p>
+
+	<p><small>$LastChangedDate: 2008-12-16 10:00:11 +0100 (tis, 16 dec 2008) $</small></p>
+	<ul>
+		<li><a href="#about">About U-Boot</a></li>
+		<li><a href="#at91rm9200dk">Board Support for AT91RM9200DK</a></li>
+		<li><a href="#at91rm9200ek">Board Support for AT91RM9200EK</a></li>
+		<li><a href="#at91sam9g20ek">Board Support for AT91SAM9G20EK</a></li>
+		<li><a href="#Minicom extensions">X-Modem/Raw extensions to minicom</a></li>
+		<li><a href="#cmd_factory">New Command: factory</a></li>
+		<li><a href="#cmd_os">New Command: os</a></li>
+		<li><a href="#cmd_fs">New Command: fs</a></li>
+		<li><a href="#cmd_setargs">New Command: setargs</a></li>
+		<li><a href="#cmd_led">New Command: led</a></li>
+		<li><a href="#cmd_mux">New Command: mux</a></li>
+		<li><a href="#cmd_ethinit">New Command: ethinit</a></li>
+		<li><a href="#environment">Special environment variables</a></li>
+	</ul>
+	<h2><a name="about" id="about"></a>About U-boot</h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	U-Boot is an open source bootloader ported to a multitude of processors.
+	See (<a href="http://www.denx.de/wiki/U-Boot/WebHome">U-Boot Home</a>)
+	for documentation for vanilla U-Boot. This document only describes
+	changes compared to the vanilla u-boot.
+	</p>
+
+	<h2><a name="at91rm9200dk" id="at91rm9200dk"></a>Board support for at91rm9200dk</h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	"at91rm9200dk" is updated to use a linux like API for gpio.
+	A new target "at91rm9200dk_df" is defined to support boot from dataflash.
+	</p>
+
+	<h2><a name="at91rm9200ek" id="at91rm9200ek"></a>Board support for at91rm9200ek</h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	The "at91rm9200ek" BSP supports booting from a parallel flash.
+	The "at91rm9200df" BSP supports a generic target booting from dataflash.
+	</p>
+
+	<h2><a name="#at91sam9g20ek" id="#at91sam9g20ek"></a>Board support for at91sam9g20ek</h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	The "at91sam9g20ek" target with dataflash(card) and NAND boot support.
+	</p>
+
+	<h2><a name="minicom_extensions" id="minicom_extensions"></a>Minicom extensions </h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	"sx-at91" is a reliable X-Modem application allowing download to the at91rm9200
+	based board
+	</p>
+	<p>
+	"raw-at91" is a download application which will download binary data using minicom.
+	Typically used to download an environment script.
+	</p>
+
+	<h2><a name="cmd_factory" id="cmd_factory"></a>New command: factory</h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	<h3><code>factory</code></h3>
+	</p>
+
+	<p>
+	"factory" will set a selected set of environment variables 
+	back to the compile time default. The following will give some
+	hints on capabilities, but is not yet complete.
+	</p>
+
+	<p>
+	It will generate a set of scripts which will facilitate downloading
+	the kernel and root file system using tftp and will also
+	add commands to store into and retrieve from flash
+	</p>
+
+	<h2><a name="cmd_os" id="cmd_os"></a>New command: os</h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	<h3><code>os<code></h3>
+	</p>
+	<p>
+	"os" computes a new name for the linux kernel
+	</p>
+
+	<h2><a name="cmd_fs" id="cmd_fs"></a>New command: fs</h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	<h3><code>fs<code></h3>
+	</p>
+	<p>
+	"fs" computes a new name for the file system
+	</p>
+
+	<h2><a name="cmd_setargs" id="cmd_setargs"></a>New command: setargs</h2>
+	<a href="#top"><small>[TOP]</small></a>
+	<p>
+	<h3><code>setargs<code></h3>
+	</p>
+	<p>
+	"setargs" will create new bootcmd/bootargs combination from
+	kernel name, filesystem name, and rootfs type.
+	</p>
+
+	<h2><a name="cmd_led" id="cmd_led"></a>New command: led</h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	<h3><code>led [green | yellow | red | all ]  [ on | off ]<code></h3>
+	</p>
+
+	<p>
+	"led" will turn on or off the specified (coloured) led
+	</p>
+
+	<h2><a name="cmd_mux" id="cmd_mux"></a>New command: mux</h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	<h3><code>mux [spi | mmc ]<code></h3>
+	</p>
+
+	<p>
+	"mux" will select how to use the flash card connector on the 
+	at91rm9200dk or at91rm9200ek
+	</p>
+
+	<h2><a name="cmd_ethinit" id="cmd_ethinit"></a>New command: ethinit</h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	<h3><code>ethinit<code></h3>
+	</p>
+
+	<p>
+	"ethinit" can be used to delay the boot of linux, until a valid network
+	connection has been established. This is useful if the machine is NFS mounting
+	the root file system and both this machine and the NFS server are powering up
+	simultaneously. The NFS server could take a lot longer to boot, and waiting
+	for this to boot may be neccessary for proper operation.
+	</p>
+
+	<h2><a name="environment" id="environment"></a>Special environment variables</h2>
+	<a href="#top"><small>[TOP]</small></a>
+
+	<p>
+	<h3><code>rd<code></h3>
+	</p>
+	<p>
+	rd contains the name of the current root file system
+	It is autmatically generated from <bold>ver</bold> and <bold>rd-1</bold>, <bold>rd-2</bold> etc.
+	The "fs-date" is added at the end.
+	</p>
+
+	<p>
+	<h3><code>ver<code></h3>
+	</p>
+	<p>
+	You can handle a number of different root fs by defining <code>ver</code>.
+	When running <code>fs</code> rd will be assigned from one of:
+	<ul><code>rd-1, rd2, rd-3 ...<code></ul>
+	</p>
+	<p>
+	By defining <code>ver</code> to a number you will
+	select the appropriate disk name 
+	</p>
+
+	<p>
+	<h3><code>fs-date<code></h3>
+	</p>
+	<p>
+	"date" part of the root file system name
+	</p>
+
+	<p>
+	<h3><code>linux<code></h3>
+	</p>
+	<p>
+	linux contains the name of the current kernel.
+	</p>
+	<p>
+	It is generated from several environment variables when <code>os</code> is run
+	</p>
+	<p>
+	A typical name would be "at91sam9263ek-linux-2.6.28-20090105.gz"
+	</p>
+
+	<p>
+	<h3><code>hostname<code></h3>
+	</p>
+	<p>
+	"name" part of the kernel file name
+	</p>
+
+	<p>
+	<h3><code>kernel-version<code></h3>
+	</p>
+	<p>
+	"version" part of the kernel file name
+	</p>
+
+	<p>
+	<h3><code>kernel-date<code></h3>
+	</p>
+	<p>
+	"date" part of the kernel file name
+	</p>
+
+	<p>
+	<h3><code>fstype [ ram | flash ]<code></h3>
+	<p>
+	You can have several file system types.
+	bootargs is created depending on fstype..
+	</p>
+
+	<a href="#top"><small>[TOP]</small></a>
+
+	</div>
+<!--
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+</body>
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author	Ulf Samuelsson <ulf.samuelsson@atmel.com>	2009-01-06 16:30:32 +0000
committer	Ulf Samuelsson <ulf.samuelsson@atmel.com>	2009-01-06 16:30:32 +0000
commit	f53a437e4ec287780fda14ea8de48c212f04872f (patch)
tree	b52b3e7b18f11d22b51088f7e716cb019fb52552 /docs
parent	0082e57f169f868ac3d475b5edfe2e05cee1f88c (diff)