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<title>CMSIS-Core (Cortex-A): Stack Pointer (SP/R13)</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">Stack Pointer (SP/R13)<div class="ingroups"><a class="el" href="group__CMSIS__core__register.html">Core Register Access</a></div></div> </div>
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<p>The processor uses SP as a pointer to the active stack.
<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:ga6af63cb939bd108aef1c0f12622350cb"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__comp__cntrl__gr.html#gaba87361bfad2ae52cfe2f40c1a1dbf9c">__STATIC_INLINE</a> <a class="el" href="group__comp__cntrl__gr.html#ga1378040bcf22428955c6e3ce9c2053cd">__ASM</a> void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__SP.html#ga6af63cb939bd108aef1c0f12622350cb">__set_SP</a> (uint32_t stack)</td></tr>
<tr class="memdesc:ga6af63cb939bd108aef1c0f12622350cb"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set Stack Pointer. <a href="#ga6af63cb939bd108aef1c0f12622350cb">More...</a><br/></td></tr>
<tr class="separator:ga6af63cb939bd108aef1c0f12622350cb"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gabfe36eb17b6ae34633c7e155d132426e"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__comp__cntrl__gr.html#gaba87361bfad2ae52cfe2f40c1a1dbf9c">__STATIC_INLINE</a> <a class="el" href="group__comp__cntrl__gr.html#ga1378040bcf22428955c6e3ce9c2053cd">__ASM</a> void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CMSIS__SP.html#gabfe36eb17b6ae34633c7e155d132426e">__set_SP_usr</a> (uint32_t topOfProcStack)</td></tr>
<tr class="memdesc:gabfe36eb17b6ae34633c7e155d132426e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set USR/SYS Stack Pointer. <a href="#gabfe36eb17b6ae34633c7e155d132426e">More...</a><br/></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
<p>The Stack Pointer is banked per processor mode. Accessing the active stack pointer actually returns/modifies the stack pointer of the current processor execution mode.</p>
<table class="doxtable">
<tr>
<th align="left">Mode </th><th align="left">Actual SP </th></tr>
<tr>
<td align="left">User/System </td><td align="left">SP_usr </td></tr>
<tr>
<td align="left">Hypervisor </td><td align="left">SP_hyp </td></tr>
<tr>
<td align="left">Supervisor </td><td align="left">SP_svc </td></tr>
<tr>
<td align="left">Abort </td><td align="left">SP_abt </td></tr>
<tr>
<td align="left">Undefined </td><td align="left">SP_und </td></tr>
<tr>
<td align="left">Monitor </td><td align="left">SP_mon </td></tr>
<tr>
<td align="left">IRQ </td><td align="left">SP_irq </td></tr>
<tr>
<td align="left">FIQ </td><td align="left">SP_fiq </td></tr>
</table>
<p>Consider <a class="el" href="group__CMSIS__SP.html#ga6af63cb939bd108aef1c0f12622350cb">__set_SP</a> and <a class="el" href="group__CMSIS__SP.html#gabfe36eb17b6ae34633c7e155d132426e">__set_SP_usr</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> <a class="el" href="group__comp__cntrl__gr.html#ga1378040bcf22428955c6e3ce9c2053cd">__ASM</a> void __set_SP </td>
<td>(</td>
<td class="paramtype">uint32_t&#160;</td>
<td class="paramname"><em>stack</em></td><td>)</td>
<td></td>
</tr>
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<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">stack</td><td>Stack Pointer value to set</td></tr>
</table>
</dd>
</dl>
<p>This function assigns the given value to the current stack pointer. </p>
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<td class="memname"><a class="el" href="group__comp__cntrl__gr.html#gaba87361bfad2ae52cfe2f40c1a1dbf9c">__STATIC_INLINE</a> <a class="el" href="group__comp__cntrl__gr.html#ga1378040bcf22428955c6e3ce9c2053cd">__ASM</a> void __set_SP_usr </td>
<td>(</td>
<td class="paramtype">uint32_t&#160;</td>
<td class="paramname"><em>topOfProcStack</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">topOfProcStack</td><td>USR/SYS Stack Pointer value to set</td></tr>
</table>
</dd>
</dl>
<p>This function assigns the given value to the User/System Stack Pointer (SP_usr). </p>
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