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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>kgdb_roundup_cpus</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Using kgdb and the kgdb Internals" /><link rel="up" href="ch06.html#kgdbArchitecture" title="Architecture Specifics" /><link rel="prev" href="re10.html" title="kgdb_arch_handle_exception" /><link rel="next" href="re12.html" title="struct kgdb_arch" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>kgdb_roundup_cpus</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re10.html">Prev</a> </td><th width="60%" align="center">Architecture Specifics</th><td width="20%" align="right"> <a accesskey="n" href="re12.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="kgdb_roundup_cpus"><a id="API-kgdb-roundup-cpus"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>kgdb_roundup_cpus —
Get other CPUs into a holding pattern
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">void <b class="fsfunc">kgdb_roundup_cpus </b>(</code></td><td>unsigned long <var class="pdparam">flags</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2721729"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>flags</code></em></span></dt><dd><p>
Current IRQ state
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2721755"></a><h2>Description</h2><p>
On SMP systems, we need to get the attention of the other CPUs
and get them be in a known state. This should do what is needed
to get the other CPUs to call <code class="function">kgdb_wait</code>. Note that on some arches,
the NMI approach is not used for rounding up all the CPUs. For example,
in case of MIPS, <code class="function">smp_call_function</code> is used to roundup CPUs. In
this case, we have to make sure that interrupts are enabled before
calling <code class="function">smp_call_function</code>. The argument to this function is
the flags that will be used when restoring the interrupts. There is
<code class="function">local_irq_save</code> call before <code class="function">kgdb_roundup_cpus</code>.
</p><p>
On non-SMP systems, this is not called.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re10.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch06.html#kgdbArchitecture">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re12.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>kgdb_arch_handle_exception</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>struct kgdb_arch</span></td></tr></table></div></body></html>
