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<div class="header">
  <div class="headertitle"><div class="title">port_m33.h</div></div>
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<a href="port__m33_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span> </div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="preprocessor">#include &lt;stdint.h&gt;</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span> </div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="preprocessor">#include &quot;hardware/structs/scb.h&quot;</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="keyword">extern</span> <span class="stringliteral">&quot;C&quot;</span> {</div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span> </div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment">// One-time port setup: FPU context policy + SysTick + PendSV priority. Called from tk::start().</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="keywordtype">void</span> <a class="code hl_function" href="port__m33_8c.html#ac9d435a65b90e71074dd44f97b1103f8">tk_port_init</a>(uint32_t ticks_per_sec);</div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span> </div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment">// Build a task&#39;s initial stack frame. Returns the SP to start with.</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"><a class="line" href="port__m33_8h.html#a57df28e1d96b701ef5b9713cae179462">   15</a></span>uintptr_t <a class="code hl_function" href="port__m33_8h.html#a57df28e1d96b701ef5b9713cae179462">tk_port_make_frame</a>(uint8_t* base, uint32_t size_bytes, <span class="keywordtype">void</span>* entry_fn, <span class="keywordtype">void</span>* arg);</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment">// Jump into the first task (r0 = SP from tk_port_make_frame). Never returns.</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"><a class="line" href="port__m33_8h.html#aaf06c4f2c498c86ed2c595d9bfe4caab">   18</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="port__m33_8h.html#aaf06c4f2c498c86ed2c595d9bfe4caab">tk_port_start</a>(uintptr_t sp);</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span> </div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="comment">// Trigger a PendSV exception to initiate context switching.</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> tk_port_trigger_pendsv(<span class="keywordtype">void</span>) {</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span>    scb_hw-&gt;icsr = 1u &lt;&lt; 28;  <span class="comment">// SCB_ICSR_PENDSVSET_Msk</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span>    __asm__ <span class="keyword">volatile</span>(<span class="stringliteral">&quot;isb&quot;</span> ::: <span class="stringliteral">&quot;memory&quot;</span>);</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span>}</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span><span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span>}</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span><span class="preprocessor">#endif</span></div>
<div class="ttc" id="aport__m33_8c_html_ac9d435a65b90e71074dd44f97b1103f8"><div class="ttname"><a href="port__m33_8c.html#ac9d435a65b90e71074dd44f97b1103f8">tk_port_init</a></div><div class="ttdeci">void tk_port_init(uint32_t ticks_per_sec)</div><div class="ttdef"><b>Definition</b> port_m33.c:14</div></div>
<div class="ttc" id="aport__m33_8h_html_a57df28e1d96b701ef5b9713cae179462"><div class="ttname"><a href="port__m33_8h.html#a57df28e1d96b701ef5b9713cae179462">tk_port_make_frame</a></div><div class="ttdeci">uintptr_t tk_port_make_frame(uint8_t *base, uint32_t size_bytes, void *entry_fn, void *arg)</div></div>
<div class="ttc" id="aport__m33_8h_html_aaf06c4f2c498c86ed2c595d9bfe4caab"><div class="ttname"><a href="port__m33_8h.html#aaf06c4f2c498c86ed2c595d9bfe4caab">tk_port_start</a></div><div class="ttdeci">void tk_port_start(uintptr_t sp)</div></div>
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