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<title>CMSIS-Core (Cortex-A): Multiprocessor Affinity Register (MPIDR)</title>
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<div id="projectname">CMSIS-Core (Cortex-A)
&#160;<span id="projectnumber">Version 1.1.4</span>
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<div id="projectbrief">CMSIS-Core support for Cortex-A processor-based devices</div>
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<a href="#func-members">Functions</a> </div>
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<div class="title">Multiprocessor Affinity Register (MPIDR)<div class="ingroups"><a class="el" href="group__CMSIS__core__register.html">Core Register Access</a></div></div> </div>
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<p>In a multiprocessor system, the MPIDR provides an additional processor identification mechanism for scheduling purposes, and indicates whether the implementation includes the Multiprocessing Extensions.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga05394b4cb9fb0ba1329ec6521c76e571"><td class="memItemLeft" align="right" valign="top"><a class="el" href="cmsis__armcc_8h.html#ab904513442afdf77d4f8c74f23cbb040">__STATIC_FORCEINLINE</a> uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__MPIDR.html#ga05394b4cb9fb0ba1329ec6521c76e571">__get_MPIDR</a> (void)</td></tr>
<tr class="memdesc:ga05394b4cb9fb0ba1329ec6521c76e571"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get MPIDR. <a href="#ga05394b4cb9fb0ba1329ec6521c76e571">More...</a><br/></td></tr>
<tr class="separator:ga05394b4cb9fb0ba1329ec6521c76e571"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
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<th align="left">Bits </th><th align="left">Name </th><th align="left">Function </th></tr>
<tr>
<td align="left">[31] </td><td align="left">MPEA </td><td align="left">Multiprocessing Extensions Available </td></tr>
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<td align="left">[30] </td><td align="left">U </td><td align="left">Indicates a Uniprocessor system </td></tr>
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<td align="left">[29:25] </td><td align="left">- </td><td align="left">Reserved. </td></tr>
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<td align="left">[24] </td><td align="left">MT </td><td align="left">Indicates whether the lowest level of affinity consists of logical processors that are implemented using a multi-threading type approach. </td></tr>
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<td align="left">[23:16] </td><td align="left">Aff2 </td><td align="left">Affinity level 2. </td></tr>
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<td align="left">[15:8] </td><td align="left">Aff1 </td><td align="left">Affinity level 1. </td></tr>
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<td align="left">[7:0] </td><td align="left">Aff0 </td><td align="left">Affinity level 0. </td></tr>
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<p>Consider <a class="el" href="group__CMSIS__MPIDR.html#ga05394b4cb9fb0ba1329ec6521c76e571">__get_MPIDR</a> to access this register. </p>
<h2 class="groupheader">Function Documentation</h2>
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<td class="memname"><a class="el" href="group__comp__cntrl__gr.html#gaba87361bfad2ae52cfe2f40c1a1dbf9c">__STATIC_INLINE</a> uint32_t __get_MPIDR </td>
<td>(</td>
<td class="paramtype">void&#160;</td>
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<p>This function returns the value of the Multiprocessor Affinity Register.</p>
<dl class="section return"><dt>Returns</dt><dd>Multiprocessor Affinity Register value</dd></dl>
<p>This function returns the value of the <a class="el" href="group__CMSIS__MPIDR.html">Multiprocessor Affinity Register (MPIDR)</a>. </p>
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