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13
14<h1>DCInvalidateRange</h1>
15
16<h2>Syntax</h2>
17<dl><dd><pre class="construction">
18#include &lt;revolution/os.h&gt;
19
20void DCInvalidateRange(void* startAddr, u32 nBytes);
21</pre></dd></dl>
22
23<h2>Arguments</h2>
24<TABLE class="arguments" border="1" >
25  <tr>
26<TH>startAddr</TH>
27<TD>Effective address (not the physical address).</TD>
28    </tr>
29  <tr>
30<TH>nBytes</TH>
31<TD>Size of range to invalidate.</TD>
32    </tr>
33</TABLE>
34
35<h2>Return Values</h2>
36<p>None.</p>
37
38<h2>Description</h2>
39<p>Invalidates a specified region. For the portion of the specified region that hits the data cache, that cache data will be invalidated. Invalidation is performed with the <SPAN class="argument">startAddr</SPAN> argument rounded down to the closest 32-byte boundary. The end address of the target region, <SPAN class="argument">startAddr</SPAN> + <SPAN class="argument">nBytes</SPAN>, will be rounded up for invalidation.</p>
40
41<p> ( Note that if the cache is disabled or frozen (through <code><a href="DCFreeze.html">DCFreeze</a></code>), this command will still execute. There is a possibility that the cache may actually be invalidated at this time (it is unclear what processing will be performed).</p>
42
43<h2>See Also</h2>
44<P class="reference">
45<A href="../toc.html#Cache" target="contents">Cache Functions</A>,
46<a href="DCFlushRange.html">DCFlushRange</a>,
47<a href="DCStoreRange.html">DCStoreRange</a>,
48<a href="ICInvalidateRange.html">ICInvalidateRange</a>
49</p>
50
51<h2>Revision History</h2>
52<P>
532006/03/01 Initial version.<br>
54</p>
55
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