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105 lines
6.2 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
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<title>ChibiOS/RT: PowerPC</title>
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<link href="custom.css" rel="stylesheet" type="text/css">
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</head><body>
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<table style="text-align: center; width: 100%;" border="0"
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cellpadding="2" cellspacing="2">
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<tbody>
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<tr>
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<td style="width: 80px;"><img alt="ChibiOS/RT Logo" src="logo_small.png"></td>
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<td><big><big>ChibiOS/RT</big></big><br><br>Architecture - Reference Manual - Guides</td>
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<td style="width: 80px;"></td>
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</tr>
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</tbody>
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</table>
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<hr size="1">
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<!-- Generated by Doxygen 1.7.1 -->
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<div class="navigation" id="top">
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<div class="tabs">
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<ul class="tablist">
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<li><a href="main.html"><span>Main Page</span></a></li>
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<li><a href="modules.html"><span>Modules</span></a></li>
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<li><a href="annotated.html"><span>Data Structures</span></a></li>
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<li><a href="files.html"><span>Files</span></a></li>
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</ul>
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</div>
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</div>
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<div class="header">
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<div class="summary">
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<a href="#groups">Modules</a> </div>
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<div class="headertitle">
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<h1>PowerPC<br/>
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<small>
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[<a class="el" href="group__ports.html">Ports</a>]</small>
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</h1> </div>
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</div>
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<div class="contents">
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<p><div class="dynheader">
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Collaboration diagram for PowerPC:</div>
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<div class="dyncontent">
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<center><table><tr><td><img src="group___p_p_c.png" border="0" alt="" usemap="#group______p__p__c"/>
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<map name="group______p__p__c" id="group______p__p__c">
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<area shape="rect" id="node1" href="group__ports.html" title="Ports" alt="" coords="7,81,52,108"/>
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<area shape="rect" id="node2" href="group___s_p_c563___d_r_i_v_e_r_s.html" title="Device drivers included in the SPC563 support." alt="" coords="237,5,336,32"/>
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<area shape="rect" id="node3" href="group___p_p_c___c_o_n_f.html" title="PowerPC Configuration Options." alt="" coords="224,56,349,83"/>
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<area shape="rect" id="node5" href="group___p_p_c___s_t_a_r_t_u_p.html" title="PPC startup code support." alt="" coords="237,107,336,133"/>
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<area shape="rect" id="node6" href="group___p_p_c___c_o_r_e.html" title="PowerPC specific port code, structures and macros." alt="" coords="217,157,356,184"/>
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</map>
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</td></tr></table></center>
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</div>
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</p>
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<hr/><a name="_details"></a><h2>Description</h2>
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<p>PowerPC port details. This section describes how the ChibiOS/RT features are implemented on this architecture.</p>
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<h2><a class="anchor" id="PPC_STATES"></a>
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Mapping of the System States in the PowerPC port</h2>
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<p>The ChibiOS/RT logical <a class="el" href="concepts.html#system_states">System States</a> are mapped as follow in the PowerPC port:</p>
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<ul>
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<li><b>Init</b>. This state is represented by the startup code and the initialization code before <code><a class="el" href="group__system.html#gafe2c7de6567e98e487e009e81e3be10b" title="ChibiOS/RT initialization.">chSysInit()</a></code> is executed. It has not a special hardware state associated.</li>
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<li><b>Normal</b>. This is the state the system has after executing <code><a class="el" href="group__system.html#gafe2c7de6567e98e487e009e81e3be10b" title="ChibiOS/RT initialization.">chSysInit()</a></code>. Interrupts are enabled.</li>
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<li><b>Suspended</b>. Interrupts are disabled.</li>
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<li><b>Disabled</b>. Interrupts are disabled. This state is equivalent to the Suspended state because there are no fast interrupts in this architecture.</li>
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<li><b>Sleep</b>. This state is entered with the execution of the specific instruction <code><b>wait</b></code>.</li>
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<li><b>S-Locked</b>. Interrupts are disabled.</li>
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<li><b>I-Locked</b>. This state is equivalent to the SRI state, the <code>chSysLockI()</code> and <code>chSysUnlockI()</code> APIs do nothing (still use them in order to formally change state because this may change).</li>
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<li><b>Serving Regular Interrupt</b>. Normal interrupt service code.</li>
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<li><b>Serving Fast Interrupt</b>. Not present in this architecture.</li>
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<li><b>Serving Non-Maskable Interrupt</b>. The PowerPC has several non maskable interrupt sources that can be associated to this state.</li>
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<li><b>Halted</b>. Implemented as an infinite loop with interrupts disabled.</li>
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</ul>
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<h2><a class="anchor" id="PPC_NOTES"></a>
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The PowerPC port notes</h2>
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<p>The PowerPC port is organized as follow:</p>
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<ul>
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<li>The <code>main()</code> function is invoked in privileged mode.</li>
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<li>Each thread has a private stack with extra storage for interrupts servicing.</li>
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<li>The Book-E Decrementer Timer, mapped on IVOR10, is used for system tick.</li>
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<li>Interrupt nesting is not currently supported.</li>
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</ul>
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<table class="memberdecls">
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<tr><td colspan="2"><h2><a name="groups"></a>
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Modules</h2></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_p_c___c_o_n_f.html">Configuration Options</a></td></tr>
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<p><tr><td class="mdescLeft"> </td><td class="mdescRight"><p>PowerPC Configuration Options. </p>
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<br/></td></tr>
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</p>
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<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_p_c___c_o_r_e.html">Core Port Implementation</a></td></tr>
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<p><tr><td class="mdescLeft"> </td><td class="mdescRight"><p>PowerPC specific port code, structures and macros. </p>
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<br/></td></tr>
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</p>
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<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_p_c___s_t_a_r_t_u_p.html">Startup Support</a></td></tr>
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<p><tr><td class="mdescLeft"> </td><td class="mdescRight"><p>PPC startup code support. </p>
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<br/></td></tr>
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</p>
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<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group___s_p_c563___d_r_i_v_e_r_s.html">SPC563 Drivers</a></td></tr>
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<p><tr><td class="mdescLeft"> </td><td class="mdescRight"><p>Device drivers included in the SPC563 support. </p>
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<br/></td></tr>
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</p>
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</table>
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</div>
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<hr size="1"><address style="text-align: right;"><small>
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Generated on Sun Nov 28 2010 14:09:56 for ChibiOS/RT by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.7.1</small></address>
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</body>
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