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<div class="section" id="ibm-opal">
<span id="device-tree-ibm-opal"></span><h1>ibm,opal<a class="headerlink" href="#ibm-opal" title="Permalink to this headline">¶</a></h1>
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<li class="toctree-l1"><a class="reference internal" href="ibm,opal/diagnostics.html">ibm,opal/diagnostics device tree entries</a></li>
<li class="toctree-l1"><a class="reference internal" href="ibm,opal/dump.html">Dump (MPIPL) Device Tree Binding</a></li>
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<li class="toctree-l1"><a class="reference internal" href="ibm,opal/nvram.html">nvram Device Tree Node</a></li>
<li class="toctree-l1"><a class="reference internal" href="ibm,opal/oppanel.html">Operator Panel (oppanel)</a></li>
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<div class="section" id="top-level-ibm-opal-node">
<h2>Top level ibm,opal node<a class="headerlink" href="#top-level-ibm-opal-node" title="Permalink to this headline">¶</a></h2>
<div class="highlight-dts notranslate"><div class="highlight"><pre><span></span><span class="nc">ibm,opal</span> <span class="p">{</span>
<span class="nf">#address-cells</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span><span class="p">>;</span>
<span class="nf">#size-cells</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span><span class="p">>;</span>
<span class="nf">compatible</span> <span class="o">=</span> <span class="s">"ibm,opal-v2", "ibm,opal-v3"</span><span class="p">;</span>
<span class="cm">/* v2 is maintained for possible compatibility with very, very old kernels</span>
<span class="cm"> * it will go away at some point in the future. Detect and rely on ibm,opal-v3</span>
<span class="cm"> * ibm,opal-v2 is *NOT* present on POWER9 and above.</span>
<span class="cm"> */</span>
<span class="nf">ibm,associativity-reference-points</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x4</span> <span class="mh">0x3</span><span class="p">,</span> <span class="mh">0x2</span><span class="p">>;</span>
<span class="nf">ibm,heartbeat-ms</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x7d0</span><span class="p">>;</span>
<span class="cm">/* how often any OPAL call needs to be made to avoid a watchdog timer on BMC</span>
<span class="cm"> * from kicking in</span>
<span class="cm"> */</span>
<span class="nf">ibm,opal-memcons</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span> <span class="mh">0x3007a000</span><span class="p">>;</span>
<span class="cm">/* location of in memory OPAL console buffer. */</span>
<span class="nf">ibm,opal-trace-mask</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span> <span class="mh">0x3008c3f0</span><span class="p">>;</span>
<span class="nf">ibm,opal-traces</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span> <span class="mh">0x3007b010</span> <span class="mh">0x0</span> <span class="mh">0x10077</span> <span class="mh">0x0</span> <span class="mh">0x3b001010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x0</span> <span class="mh">0x3b103010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x0</span> <span class="mh">0x3b205010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x0</span> <span class="mh">0x3b307010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x0</span> <span class="mh">0x3b409010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x1801010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x1903010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x1a05010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x1b07010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x1c09010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x1d0b010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x1e0d010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x1f0f010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x2011010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x2113010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x2215010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x2317010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x2419010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x251b010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span> <span class="mh">0x10</span> <span class="mh">0x261d010</span> <span class="mh">0x0</span> <span class="mh">0x1000a7</span><span class="p">>;</span>
<span class="cm">/* see docs on tracing */</span>
<span class="nf">linux,phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x10000003</span><span class="p">>;</span>
<span class="nf">opal-base-address</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span> <span class="mh">0x30000000</span><span class="p">>;</span>
<span class="nf">opal-entry-address</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span> <span class="mh">0x300050c0</span><span class="p">>;</span>
<span class="nf">opal-interrupts</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x10</span> <span class="mh">0x11</span> <span class="mh">0x12</span> <span class="mh">0x13</span> <span class="mh">0x14</span> <span class="mh">0x20010</span> <span class="mh">0x20011</span> <span class="mh">0x20012</span> <span class="mh">0x20013</span> <span class="mh">0x20014</span> <span class="mh">0xffe</span> <span class="mh">0xfff</span> <span class="mh">0x17fe</span> <span class="mh">0x17ff</span> <span class="mh">0x2ffe</span> <span class="mh">0x2fff</span> <span class="mh">0x37fe</span> <span class="mh">0x37ff</span> <span class="mh">0x20ffe</span> <span class="mh">0x20fff</span> <span class="mh">0x22ffe</span> <span class="mh">0x22fff</span> <span class="mh">0x237fe</span> <span class="mh">0x237ff</span><span class="p">>;</span>
<span class="nf">opal-msg-async-num</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x8</span><span class="p">>;</span>
<span class="nf">opal-msg-size</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x48</span><span class="p">>;</span>
<span class="nf">opal-runtime-size</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span> <span class="mh">0x9a00000</span><span class="p">>;</span>
<span class="nf">phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x10000003</span><span class="p">>;</span>
<span class="p">};</span>
</pre></div>
</div>
<div class="section" id="ibm-heartbeat-ms">
<h3>ibm,heartbeat-ms<a class="headerlink" href="#ibm-heartbeat-ms" title="Permalink to this headline">¶</a></h3>
<div class="highlight-dts notranslate"><div class="highlight"><pre><span></span><span class="nc">ibm,opal</span> <span class="p">{</span>
<span class="nf">ibm,heartbeat-ms</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x7d0</span><span class="p">>;</span>
<span class="err">}</span>
</pre></div>
</div>
<p>Any OS targetting POWER9 processors <em>must</em> respect <cite>ibm,heartbeat-ms</cite>.</p>
<p>Linux kernels prior to v4.1-rc1 would ignore <cite>ibm,heartbeat-ms</cite>. These only
supported POWER8 systems.</p>
<p>On the earliest POWER8 OPAL systems, there was <cite>ibm,heartbeat-freq</cite> instead.
However, no OS at the time ever looked at that value, so it can be ignored
by any new operating systems.</p>
</div>
<div class="section" id="fast-reboot-property">
<h3>fast-reboot property<a class="headerlink" href="#fast-reboot-property" title="Permalink to this headline">¶</a></h3>
<p>This property of the <cite>ibm,opal</cite> node is an option property that will either be
the string <cite>okay</cite> or the reason the fast reboot feature was disabled on boot.</p>
<p>The motivation behind adding this property is to help the OPAL test suite work
out if it should even try the fast reboot test on a particular platform
(without it having to resort to grepping firmware logs).</p>
</div>
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<ul>
<li><a class="reference internal" href="#">ibm,opal</a><ul>
<li><a class="reference internal" href="#top-level-ibm-opal-node">Top level ibm,opal node</a><ul>
<li><a class="reference internal" href="#ibm-heartbeat-ms">ibm,heartbeat-ms</a></li>
<li><a class="reference internal" href="#fast-reboot-property">fast-reboot property</a></li>
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