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<section id="apis-exported-by-nuttx-to-architecture-specific-logic">
<h1>APIs Exported by NuttX to Architecture-Specific Logic<a class="headerlink" href="#apis-exported-by-nuttx-to-architecture-specific-logic" title="Permalink to this heading"></a></h1>
<p>These are standard interfaces that are exported by the OS for use
by the architecture specific logic.</p>
<dl class="c function">
<dt class="sig sig-object c" id="c.nx_start">
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">nx_start</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">void</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.nx_start" title="Permalink to this definition"></a><br /></dt>
<dd><p><strong>To be provided</strong></p>
</dd></dl>
<section id="os-list-management-apis">
<h2>OS List Management APIs<a class="headerlink" href="#os-list-management-apis" title="Permalink to this heading"></a></h2>
<p><strong>To be provided</strong></p>
<dl class="c function">
<dt class="sig sig-object c" id="c.nxsched_process_timer">
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">nxsched_process_timer</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">void</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.nxsched_process_timer" title="Permalink to this definition"></a><br /></dt>
<dd><p>This function handles system timer events. The
timer interrupt logic itself is implemented in the architecture
specific code, but must call the following OS function
periodically – the calling interval must be
<code class="docutils literal notranslate"><span class="pre">CONFIG_USEC_PER_TICK</span></code>.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.nxsched_timer_expiration">
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">nxsched_timer_expiration</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">void</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.nxsched_timer_expiration" title="Permalink to this definition"></a><br /></dt>
<dd><p>Description: if <code class="docutils literal notranslate"><span class="pre">CONFIG_SCHED_TICKLESS</span></code> is defined, then this
function is provided by the RTOS base code and called from
platform-specific code when the interval timer used to implemented
the tick-less OS expires.</p>
<p><strong>Assumptions</strong>: Base code implementation assumes that this
function is called from interrupt handling logic with interrupts disabled.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.nxsched_alarm_expiration">
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">nxsched_alarm_expiration</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">void</span></span><span class="sig-paren">)</span><span class="p"><span class="pre">;</span></span><a class="headerlink" href="#c.nxsched_alarm_expiration" title="Permalink to this definition"></a><br /></dt>
<dd><p>If <code class="docutils literal notranslate"><span class="pre">CONFIG_SCHED_TICKLESS</span></code> is defined, then this
function is provided by the RTOS base code and called from
platform-specific code when the interval timer used to implemented
the tick-less OS expires.</p>
<p><strong>Assumptions</strong>: Base code implementation assumes that this
function is called from interrupt handling logic with interrupts disabled.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.irq_dispatch">
<span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">irq_dispatch</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">irq</span></span>, <span class="pre">FAR</span><span class="w"> </span><span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">context</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.irq_dispatch" title="Permalink to this definition"></a><br /></dt>
<dd><p>This function must be called from the
architecture- specific logic in order to display an interrupt to
the appropriate, registered handling logic.</p>
</dd></dl>
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