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13
14<h1>DCInvalidateRange</h1>
15
16
17<h2>C Specification</h2>
18<BLOCKQUOTE>
19<pre><CODE>#include &lt;revolution/os.h&gt;
20
21void DCInvalidateRange(void* startAddr, u32 nBytes);</CODE></pre>
22</BLOCKQUOTE>
23<h2>Arguments</h2>
24<TABLE border="1" cellpadding="3" cellspacing="0.1">
25  <tr>
26<TD width="120" bgcolor="#ffffe8"><em><strong><code><STRONG><EM><CODE>startAddr</CODE></EM></STRONG></code></strong></em></TD>
27<TD width="520">Effective address (not the physical address) .</TD>
28    </tr>
29  <tr>
30<TD width="120" bgcolor="#ffffe8"><strong><em><code><STRONG><EM><CODE>nBytes</CODE></EM></STRONG></code></em></strong></TD>
31<TD width="520">Size of range to invalidate.</TD>
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33</TABLE>
34<h2>Return Values</h2>
35
36<p>None.</p>
37<h2>Description</h2>
38
39<p>Invalidates a specified data cache range. The cache data block hit in the data cache for the specified range is invalidated. The <code><strong><em>startAddr</em></strong></code> argument will be rounded down to the closest 32-byte boundary, while the end address, i.e., <code><strong><em>startAddr</em></strong></code><i> + </i><strong><em><code>nBytes</code></em></strong>, will be rounded up to closest 32-byte boundary.</p>
40
41<p>If the cache is disabled or frozen (using <code><a href="DCFreeze.html">DCFreeze</a></code>), this command will still execute. In this situation, the cache may be invalidated (what sort of processing will take place is unclear).</p>
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43<p></p>
44
45<h2>See Also</h2>
46
47<p><a href="../toc.html#Cache" target="contents">Cache Functions</a>, <code><a href="DCFlushRange.html">DCFlushRange</a></code>, <a href="DCStoreRange.html"><code>DCStoreRange</code></a>, <code><a href="ICInvalidateRange.html">ICInvalidateRange</a></code></p>
48
49<h2>Revision History</h2><p></p>
50
51<P>2006/03/01 Initial version.</p>
52
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54<P>CONFIDENTIAL</p>
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