82 lines
3.5 KiB
XML
82 lines
3.5 KiB
XML
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
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[<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
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<chapter id='kernel-dev-intro'>
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<title>Yocto Project Kernel Development Manual</title>
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<section id='kernel-dev-introduction'>
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<title>Introduction</title>
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<para>
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Regardless of how you intend to make use of the Yocto Project, chances are you
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are going to need to work with the Linux kernel. The Yocto Project provides a
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powerful set of tools for managing Linux kernel sources and configuration data.
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If you want to make a single configuration change, apply a couple of patches, or
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work with your own sources, the Yocto Project has tooling in place to help you
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do it.
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</para>
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<para>
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Each Yocto Project release introduces a new set of linux-yocto kernel recipes,
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tracking the latest upstream developments and introducing newly supported
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platforms. In addition to the new kernel recipes, the previous recipes are
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refreshed and supported for at least one additional release. As they align,
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these previous releases are updated to include the latest from the LTSI project.
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Besides these recipes, a linux-yocto-dev recipe is available for working with
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the very latest in upstream Linux kernel development as well as meta-data
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development.
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</para>
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<para>
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If you do not maintain your own kernel sources and need to make only minimal
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changes to the sources, these recipes provide a vetted base upon which to layer
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your changes. Doing so allows you to benefit from the continual kernel
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integration and testing performed during development of the Yocto Project.
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</para>
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<para>
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If, instead, you have a very specific Linux kernel source tree and are unable to
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align with one of the many official linux-yocto releases, an alternative
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exists by which you can use the Yocto Project Linux kernel tools with your own
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sources.
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</para>
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<para>
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The sections that follow provide instructions for completing specific Linux
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kernel development tasks. They assume familiarity with working with bitbake
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recipes and basic open-source development tools. Understanding these concepts
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will facilitate the process of working with the kernel recipes. If you find you
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need some additional background, please be sure to review and understand the
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following documentation:
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<itemizedlist>
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<listitem><para><emphasis>Yocto Project Quick Start</emphasis>
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</para></listitem>
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<listitem><para><emphasis>Yocto Project Development Manual</emphasis>
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<itemizedlist>
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<listitem><para><emphasis>4.3 Modifying Temporary Source Code</emphasis>
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</para></listitem>
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<listitem><para><emphasis>5.1 Understanding and Creating Layers</emphasis>
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</para></listitem>
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<listitem><para><emphasis>4.1.2 Modifying the Kernel</emphasis>
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(This section should be retired, as well as 5.6, 5.7 - with this document
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providing the necessary information)</para></listitem>
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</itemizedlist></para></listitem>
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</itemizedlist>
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</para>
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<para>
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Finally, while this document focuses on the manual creation of recipes, patches,
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and configuration files, the Yocto Project BSP tools are available to automate
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this process with existing content and work well to create the initial framework
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and boilerplate code. For details, refer to the Yocto Project BSP Developer's
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Guide.
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</para>
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</section>
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</chapter>
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<!--
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vim: expandtab tw=80 ts=4
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-->
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