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diff --git a/docs/U-boot.html b/docs/U-boot.html new file mode 100644 index 000000000..0ab2a76b1 --- /dev/null +++ b/docs/U-boot.html @@ -0,0 +1,255 @@ +<?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> +<!-- + <a href="http://validator.w3.org/check?uri=referer"><img + border="0" height="31" width="88" + src="images/valid-html401.png" + alt="Valid HTML"></img></a> +--> + +</body> +</html> |