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<h2>
<a name="1205903"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">cache_lock</font>
</h2><hr>
<p>
<a name="1215859"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Lock the cache configuration</font>
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<h3>
<a name="1215860"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Synopsis</font>
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<a name="1215861"> </a><font size=2 face=Courier><strong>int cache_lock( void );<br></strong></font>
<h3>
<a name="1205907"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Arguments</font>
</h3>
<p>
<a name="1205908"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">None</font>
</p>
<h3>
<a name="1205910"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Results</font>
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<a name="1205911"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Returns <font size=2 face=Courier><strong>0</strong></font> on success, <font size=2 face=Courier><strong>-1</strong></font> if an error occurs.</font>
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<h3>
<a name="1205912"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Errors</font>
</h3>
<p>
<a name="1205913"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Returns <font size=2 face=Courier><strong>-1</strong></font> if the cache registers have already been locked.</font>
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<h3>
<a name="1205914"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Description</font>
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<p>
<a name="1205915"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">This function locks the cache configuration by writing to the <span class=Signal>CacheControlLock</span> register bit. The cache configuration can only be unlocked by a hardware reset. After the configuration has been locked only invalidating and flushing operations can be performed.</font>
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<h3>
<a name="1205916"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Callable from</font>
</h3>
<p>
<a name="1205917"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">A task, interrupt service routine or a high priority process (on an ST20C2).</font>
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<h3>
<a name="1205918"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">See also</font>
</h3>
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<a name="1205919"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><a href="libs9.htm#1205764"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>cache_flush_data</i></font></a>, <a href="libs11.htm#1205853"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>cache_invalidate_data</i></font></a>, <a href="libs12.htm#1205878"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>cache_invalidate_instruction</i></font></a></font>
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<font size=1 face="Verdana, Arial, Helvetica, sans-serif"> © 2001, 2002, 2003 STMicroelectronics. All Rights Reserved.<br>
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