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<!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>MPI On Cell (Documentation): src/spu/internal/dma/imoc_dma-iget_spu.c Source File</title>
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<li><a href="../../annotated.html"><span>Data Structures</span></a></li>
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<h1>src/spu/internal/dma/imoc_dma-iget_spu.c</h1><a href="../../d7/daf/imoc__dma-iget__spu_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#include <spu_mfcio.h></span>
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<a name="l00002"></a>00002 <span class="preprocessor">#include <string.h></span>
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<a name="l00003"></a>00003 <span class="preprocessor">#include <stdlib.h></span>
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<a name="l00004"></a>00004
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<a name="l00005"></a>00005 <span class="preprocessor">#include <<a class="code" href="../../d0/d3a/spu_2moc_8h.html">moc.h</a>></span>
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<a name="l00006"></a>00006 <span class="preprocessor">#include <<a class="code" href="../../dd/d9c/moc__dma__spu_8h.html">spu/moc_dma_spu.h</a>></span>
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<a name="l00007"></a>00007 <span class="preprocessor">#include <<a class="code" href="../../d2/d42/imoc__macros_8h.html">internal/imoc_macros.h</a>></span>
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<a name="l00008"></a>00008 <span class="preprocessor">#include <<a class="code" href="../../d4/dce/imoc__dma__spu_8h.html">internal/spu/imoc_dma_spu.h</a>></span>
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<a name="l00009"></a>00009
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<a name="l00010"></a><a class="code" href="../../d2/de2/group__internal__p2p__dma.html#g928d605bbb172de96e44517820b59278">00010</a> <span class="keywordtype">int</span> <a class="code" href="../../d2/de2/group__internal__p2p__dma.html#g0c76eeaa08ac299e19dc2758d4142cd9" title="Internal wrapper-function for a non-blocking DMA-get operation.">IMOC_iget_data</a>(<span class="keywordtype">void</span>* target, uint64_t source, uint32_t size,
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<a name="l00011"></a>00011 <a class="code" href="../../d4/da3/structimoc__dma__request__struct.html">imoc_dma_request</a>* request)
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<a name="l00012"></a>00012 {
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<a name="l00013"></a>00013 uint32_t remainder_16b;
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<a name="l00014"></a>00014 uint32_t remainder_16kb;
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<a name="l00015"></a>00015 uint32_t offset;
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<a name="l00016"></a>00016 uint32_t tag_id;
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<a name="l00017"></a>00017
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<a name="l00018"></a>00018 <span class="keywordflow">if</span> ((tag_id = mfc_tag_reserve()) == MFC_TAG_INVALID)
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<a name="l00019"></a>00019 {
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<a name="l00020"></a>00020 <span class="keywordflow">return</span> <a class="code" href="../../d8/da1/group__environment__error.html#g05b3a70831c823a59014c4853a76ca7e" title="Internal MOC (implementation) error.">MOC_ERR_INTERN</a>;
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<a name="l00021"></a>00021 }
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<a name="l00022"></a>00022
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<a name="l00023"></a>00023 <span class="comment">/* transfers have to be multiples of 16 bytes */</span>
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<a name="l00024"></a>00024 remainder_16b = size % 16;
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<a name="l00025"></a>00025
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<a name="l00026"></a>00026 request-><a class="code" href="../../d4/da3/structimoc__dma__request__struct.html#e9940544a153813fd1284eaa8883a1f2">remainder</a> = 0;
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<a name="l00027"></a>00027 request-><a class="code" href="../../d4/da3/structimoc__dma__request__struct.html#8322ab9ff0dbd0be788bf765f3e85e94">size</a> = size;
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<a name="l00028"></a>00028 request-><a class="code" href="../../d4/da3/structimoc__dma__request__struct.html#aab928f79935740e686706a1296b01a9">target</a> = target;
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<a name="l00029"></a>00029 request-><a class="code" href="../../d4/da3/structimoc__dma__request__struct.html#93345f8438f78d7a0309b4b0b0670476">tag_id</a> = tag_id;
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<a name="l00030"></a>00030
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<a name="l00031"></a>00031 <span class="comment">/* subtracting remainder means the transfer has a valid size now */</span>
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<a name="l00032"></a>00032 size -= remainder_16b;
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<a name="l00033"></a>00033 offset = 0;
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<a name="l00034"></a>00034
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<a name="l00035"></a>00035 <span class="comment">/* first case: transfer of size smaller than maximum allowed one (16kbyte) */</span>
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<a name="l00036"></a>00036 <span class="keywordflow">if</span> (size <= <a class="code" href="../../d1/d82/moc_8h.html#0a017736e25e8020d6ddc62e8fc96141" title="Maximum byte-count which can be transferred by one DMA-transfer.">MAX_DMA_CALL_SIZE</a>)
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<a name="l00037"></a>00037 {
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<a name="l00038"></a>00038 mfc_get(target, source, size, tag_id, 0, 0);
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<a name="l00039"></a>00039 }
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<a name="l00040"></a>00040 <span class="comment">/* second case: transfer of bigger size is simply split into parts of 16kb */</span>
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<a name="l00041"></a>00041 <span class="keywordflow">else</span>
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<a name="l00042"></a>00042 {
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<a name="l00043"></a>00043 remainder_16kb = size % <a class="code" href="../../d1/d82/moc_8h.html#0a017736e25e8020d6ddc62e8fc96141" title="Maximum byte-count which can be transferred by one DMA-transfer.">MAX_DMA_CALL_SIZE</a>;
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<a name="l00044"></a>00044 <span class="keywordflow">while</span> (offset + <a class="code" href="../../d1/d82/moc_8h.html#0a017736e25e8020d6ddc62e8fc96141" title="Maximum byte-count which can be transferred by one DMA-transfer.">MAX_DMA_CALL_SIZE</a> <= size)
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<a name="l00045"></a>00045 {
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<a name="l00046"></a>00046 mfc_get(target + offset, source + offset, <a class="code" href="../../d1/d82/moc_8h.html#0a017736e25e8020d6ddc62e8fc96141" title="Maximum byte-count which can be transferred by one DMA-transfer.">MAX_DMA_CALL_SIZE</a>,
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<a name="l00047"></a>00047 tag_id, 0, 0);
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<a name="l00048"></a>00048 offset += <a class="code" href="../../d1/d82/moc_8h.html#0a017736e25e8020d6ddc62e8fc96141" title="Maximum byte-count which can be transferred by one DMA-transfer.">MAX_DMA_CALL_SIZE</a>;
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<a name="l00049"></a>00049 }
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<a name="l00050"></a>00050 <span class="keywordflow">if</span> (remainder_16kb > 0)
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<a name="l00051"></a>00051 {
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<a name="l00052"></a>00052 mfc_get(target + offset, source + offset, remainder_16kb, tag_id,
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<a name="l00053"></a>00053 0, 0);
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<a name="l00054"></a>00054 }
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<a name="l00055"></a>00055 }
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<a name="l00056"></a>00056 <span class="comment">/* if size was reduced previously the remaining bytes have to be transfered */</span>
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<a name="l00057"></a>00057 <span class="keywordflow">if</span> (remainder_16b > 0)
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<a name="l00058"></a>00058 {
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<a name="l00059"></a>00059 request-><a class="code" href="../../d4/da3/structimoc__dma__request__struct.html#efdb405d93fc52fbe483551e3bbaafac">buffer</a> = (<span class="keywordtype">char</span>*) malloc(16 * <span class="keyword">sizeof</span>(<span class="keywordtype">char</span>));
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<a name="l00060"></a>00060 <span class="comment">/* minimum allowed transfer is 16bytes so transfer this size into a buffer */</span>
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<a name="l00061"></a>00061 mfc_get(request-><a class="code" href="../../d4/da3/structimoc__dma__request__struct.html#efdb405d93fc52fbe483551e3bbaafac">buffer</a>, source + size, 16, tag_id, 0, 0);
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<a name="l00062"></a>00062 request-><a class="code" href="../../d4/da3/structimoc__dma__request__struct.html#e9940544a153813fd1284eaa8883a1f2">remainder</a> = remainder_16b;
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<a name="l00063"></a>00063 }
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<a name="l00064"></a>00064
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<a name="l00065"></a>00065 <span class="keywordflow">return</span> <a class="code" href="../../d8/da1/group__environment__error.html#g8a73ed6676bcf0c0607d98482ca1aca4" title="No error.">MOC_SUCCESS</a>;
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<a name="l00066"></a>00066 }
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<a name="l00067"></a>00067
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</pre></div></div>
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<hr size="1"><address style="text-align: right;"><small>Generated on Thu Feb 12 13:49:47 2009 for MPI On Cell (Documentation) by
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<a href="http://www.doxygen.org/index.html">
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<img src="../../doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address>
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