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<section id="integrate-multiple-payloads">
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<span id="id1"></span><h1>Integrate Multiple Payloads<a class="headerlink" href="#integrate-multiple-payloads" title="Permalink to this heading"></a></h1>
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<p>You can integrate more than one payload files using SBL build tool:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>python BuildLoader.py build <PLATFORM> -p <PAYLOAD_FILE>:<PAYLOAD_ID>:<COMPRESSION_ALGORITHM>;...
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Multi-payload build option format:
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<PAYLOAD_FILE>:<PAYLOAD_ID>:<COMPRESSION_ALGORITHM>;...
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<PAYLOAD_FILE> : external payload file name. Required to be placed in ``PayloadPkg/PayloadBins`` directory
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<PAYLOAD_ID> : 4-byte ASCII name for this payload
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<COMPRESSION_ALGORITHM> : compression algorithm for this payload ('Lz4', 'Lzma' or 'Dummy'). 'Dummy' indicates no compression.
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This parameter is optional, and default is 'Dummy' if not specified.
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</pre></div>
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</div>
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<p>If only one payload is specified, this payload will be built into normal payload compoment (PYLD) in the SBL flash map.</p>
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<p>If more then one payloads are specified, the first payload will be built into PLD and the remaining will be built into extended payload container (EPLD) in the SBL flash map.</p>
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<blockquote>
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<div><div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>EPAYLOAD is built as an SBL Container (Refer <a class="reference internal" href="../tools/GenContainer.html#gen-container-tool"><span class="std std-ref">Container Tool</span></a>) and then put into the EPLD region.</p>
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</div>
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</div></blockquote>
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<p>The following procedure shows you how to integrate <code class="docutils literal notranslate"><span class="pre">UefiPld.fd</span></code> into SBL image. Adding other custom payloads is similar.</p>
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<ol class="arabic simple">
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<li><p>Copy <code class="docutils literal notranslate"><span class="pre">UefiPld.fd</span></code> into <code class="docutils literal notranslate"><span class="pre">PayloadPkg/PayloadBins</span></code> directory (create the directory if it is missing)</p></li>
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<li><p>Specify <code class="docutils literal notranslate"><span class="pre">PayloadId</span></code> in SBL configuration file (<code class="docutils literal notranslate"><span class="pre">*.dlt</span></code>)</p></li>
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</ol>
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<blockquote>
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<div><p><code class="docutils literal notranslate"><span class="pre">PayloadId</span></code> tells SBL which payload to load instead of default <code class="docutils literal notranslate"><span class="pre">OsLoader</span></code>. For QEMU, open <code class="docutils literal notranslate"><span class="pre">Platform/QemuBoardPkg/CfgData/CfgDataExt_Brd1.dlt</span></code> and append the following configuration:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">GEN_CFG_DATA</span><span class="o">.</span><span class="n">PayloadId</span> <span class="o">|</span> <span class="s1">'UEFI'</span>
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</pre></div>
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</div>
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<p>You may also use Configuration Editor to make file changes. See <a class="reference internal" href="../tools/ConfigTools.html#configuration-tool"><span class="std std-ref">Configuration Tools</span></a> for more details.</p>
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</div></blockquote>
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<ol class="arabic" start="3">
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<li><p>Build <code class="docutils literal notranslate"><span class="pre">UefiPld.fd</span></code> into SBL image:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">BuildLoader</span><span class="o">.</span><span class="n">py</span> <span class="n">build</span> <span class="n">qemu</span> <span class="o">-</span><span class="n">p</span> <span class="s2">"OsLoader.efi:LLDR:Lz4;UefiPld.fd:UEFI:Lzma"</span>
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</pre></div>
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</div>
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</li>
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</ol>
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<blockquote>
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<div><p><code class="docutils literal notranslate"><span class="pre">UefiPld.fd</span></code> image is located in the <code class="docutils literal notranslate"><span class="pre">EPLD</span></code> region according to SBL flash map.</p>
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<p><code class="docutils literal notranslate"><span class="pre">PayloadId</span></code> is 4 bytes and should match the value used in the configuration. In this example, <code class="docutils literal notranslate"><span class="pre">PayloadId</span></code> is <code class="docutils literal notranslate"><span class="pre">UEFI</span></code> on the command line.</p>
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</div></blockquote>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p><code class="docutils literal notranslate"><span class="pre">PayloadId</span></code> 0 is reserved for OsLoader payload.</p>
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</div>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>The payload footprint should be considered as whether it can be fit into the limited flash space. Smaller, single-purpose payload allows flexibility and easier to debug.</p>
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