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<div class="contents">
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<h1><a class="anchor" id="pImplementationNotes">Implementation notes </a></h1><h2><a class="anchor" id="sAPIs">
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Implementation APIs</a></h2>
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<p>The following APIs have been defined for easy extension fo the scoreboard classes:</p>
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<ol type="1">
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<li>Configuration API: <a class="el" href="classcl__syoscb__cfg.html" title="Configuration class for the SyoSil UVM scoreboard.">cl_syoscb_cfg</a></li>
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<li>Item API: <a class="el" href="classcl__syoscb__item.html" title="The UVM scoreboard item.">cl_syoscb_item</a></li>
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<li>Queue API: <a class="el" href="classcl__syoscb__queue.html" title="Class which base concet of a queue.">cl_syoscb_queue</a></li>
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<li>Compare API: <a class="el" href="classcl__syoscb__compare__base.html" title="Base class for all comapre algorithms.">cl_syoscb_compare_base</a></li>
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<li>Subscriber API: <a class="el" href="classcl__syoscb__subscriber.html" title="Generic subscriber for the scoreboard.">cl_syoscb_subscriber</a></li>
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<li>Iterator API: <a class="el" href="classcl__syoscb__queue__iterator__base.html" title="Queue iterator base class defining the iterator API used for iterating queues.">cl_syoscb_queue_iterator_base</a></li>
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</ol>
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<h2><a class="anchor" id="sGeneralErrorHandling">
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General error handling</a></h2>
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<p>In general when a lower level method detects an error then two concepts are used. Primarily, the method will either issue a UVM info with some information about what went wrong or issue a UVM error/fatal immediately. The first one will then return <b>1'b0</b> to signal that something went wrong. Thus, it is up to the parent levels to catch the error and convert them into UVM errors/fatals etc. This method was chosen since the parent level typically provides more and better information when things go wrong. </p>
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<h2><a class="anchor" id="sErrorCategories">
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Error categories</a></h2>
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<p>There are several ERROR categories. The following table lists them with some explanation:</p>
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<table border="1" cellspacing="3" cellpadding="3">
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<tr>
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<th><p>Error Category </p>
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</th><th><p>Description </p>
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</th></tr>
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<tr>
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<td><p>IMPL_ERROR </p>
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</td><td><p>Implementation error. Something is really broken </p>
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</td></tr>
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<tr>
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<td><p>QUEUE_ERROR </p>
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</td><td><p>A queue related error, e.g. the queue could not be found </p>
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</td></tr>
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<tr>
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<td><p>CFG_ERROR </p>
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</td><td><p>Configuration error. Usually, because the configuration object is missing </p>
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</td></tr>
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<tr>
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<td><p>TYPE_ERROR </p>
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</td><td><p>Type error. Typically issued when $cast() fails </p>
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</td></tr>
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<tr>
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<td><p>COMPARE_ERROR </p>
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</td><td><p>Compare error. Issued, e.g. when the in order compare fails </p>
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</td></tr>
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<tr>
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<td><p>SUBSCRIBER_ERROR </p>
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</td><td><p>Subscriber error. Issued, e.g. when the call to <a class="el" href="classcl__syoscb.html#a1d3983a0946cc4e38f74b249b5bb0e16" title="Returns a UVM subscriber for a given combination of queue and producer The returned...">cl_syoscb::get_subscriber()</a> fails </p>
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</td></tr>
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</table>
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<h2><a class="anchor" id="sMultipleQueueRefs">
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Multiple queue references</a></h2>
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<p>Both the top level class <a class="el" href="classcl__syoscb.html" title="Top level class implementing the root of the SyoSil UVM scoreboard.">cl_syoscb</a> and the configuration class <a class="el" href="classcl__syoscb__cfg.html" title="Configuration class for the SyoSil UVM scoreboard.">cl_syoscb_cfg</a> contains handles to all queues. The former uses an ordinary array which provides a fast way of looping over the queues and the latter an associative which makes it easy to find a queue using only its name. </p>
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Project: SyoSil ApS UVM Scoreboard, Revision: 1.0.2.5<br>
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Copyright 2014-2015 SyoSil ApS<br>
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