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<h1>dma.c</h1><a href="dma_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*****************************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"> Copyright (c) 2002-2005 The UbixOS Project</span>
<a name="l00003"></a>00003 <span class="comment"> All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> Redistribution and use in source and binary forms, with or without modification, are</span>
<a name="l00006"></a>00006 <span class="comment"> permitted provided that the following conditions are met:</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment"> Redistributions of source code must retain the above copyright notice, this list of</span>
<a name="l00009"></a>00009 <span class="comment"> conditions, the following disclaimer and the list of authors. Redistributions in binary</span>
<a name="l00010"></a>00010 <span class="comment"> form must reproduce the above copyright notice, this list of conditions, the following</span>
<a name="l00011"></a>00011 <span class="comment"> disclaimer and the list of authors in the documentation and/or other materials provided</span>
<a name="l00012"></a>00012 <span class="comment"> with the distribution. Neither the name of the UbixOS Project nor the names of its</span>
<a name="l00013"></a>00013 <span class="comment"> contributors may be used to endorse or promote products derived from this software</span>
<a name="l00014"></a>00014 <span class="comment"> without specific prior written permission.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment"> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY</span>
<a name="l00017"></a>00017 <span class="comment"> EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span>
<a name="l00018"></a>00018 <span class="comment"> MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL</span>
<a name="l00019"></a>00019 <span class="comment"> THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00020"></a>00020 <span class="comment"> SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span>
<a name="l00021"></a>00021 <span class="comment"> OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)</span>
<a name="l00022"></a>00022 <span class="comment"> HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR</span>
<a name="l00023"></a>00023 <span class="comment"> TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span>
<a name="l00024"></a>00024 <span class="comment"> SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment"> $Id: dma_8c-source.html 88 2016-01-12 00:11:29Z reddawg $</span>
<a name="l00027"></a>00027 <span class="comment"></span>
<a name="l00028"></a>00028 <span class="comment">*****************************************************************************************/</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="preprocessor">#include <<a class="code" href="dma_8h.html">sys/dma.h</a>></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <<a class="code" href="io_8h.html">sys/io.h</a>></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <<a class="code" href="types_8h.html">ubixos/types.h</a>></span>
<a name="l00033"></a>00033
<a name="l00034"></a><a class="code" href="dma_8c.html#19a055e908717e6f71f285bc5c84ea45">00034</a> <span class="preprocessor">#define lowByte(x) (x & 0x00FF)</span>
<a name="l00035"></a><a class="code" href="dma_8c.html#d03cbb59aaf2eea05907807a12936e7f">00035</a> <span class="preprocessor"></span><span class="preprocessor">#define highByte(x) ((x & 0xFF00) >> 8)</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span>
<a name="l00037"></a><a class="code" href="dma_8c.html#8c07d2b2e2c5790ec43ea5b534db08ae">00037</a> <span class="keyword">static</span> <a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> <a class="code" href="dma_8c.html#8c07d2b2e2c5790ec43ea5b534db08ae">maskReg</a>[8] = { 0x0A, 0x0A, 0x0A, 0x0A, 0xD4, 0xD4, 0xD4, 0xD4 };
<a name="l00038"></a><a class="code" href="dma_8c.html#0958d78130405d2a49b1daace7f59db7">00038</a> <span class="keyword">static</span> <a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> <a class="code" href="dma_8c.html#0958d78130405d2a49b1daace7f59db7">clearReg</a>[8] = { 0x0C, 0x0C, 0x0C, 0x0C, 0xD8, 0xD8, 0xD8, 0xD8 };
<a name="l00039"></a><a class="code" href="dma_8c.html#28967b638d408de9a6469f8501c2f60c">00039</a> <span class="keyword">static</span> <a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> <a class="code" href="dma_8c.html#28967b638d408de9a6469f8501c2f60c">modeReg</a>[8] = { 0x0B, 0x0B, 0x0B, 0x0B, 0xD6, 0xD6, 0xD6, 0xD6 };
<a name="l00040"></a><a class="code" href="dma_8c.html#86470f16b06e0b7c17961d074c124550">00040</a> <span class="keyword">static</span> <a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> <a class="code" href="dma_8c.html#86470f16b06e0b7c17961d074c124550">addrPort</a>[8] = { 0x00, 0x02, 0x04, 0x06, 0xC0, 0xC4, 0xC8, 0xCC };
<a name="l00041"></a><a class="code" href="dma_8c.html#9aa538f8203541a3c3bfc668a75d3e5f">00041</a> <span class="keyword">static</span> <a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> <a class="code" href="dma_8c.html#9aa538f8203541a3c3bfc668a75d3e5f">pagePort</a>[8] = { 0x87, 0x83, 0x81, 0x82, 0x8F, 0x8B, 0x89, 0x8A };
<a name="l00042"></a><a class="code" href="dma_8c.html#7856fd2b7ad20b0d7e189c8c52bd420e">00042</a> <span class="keyword">static</span> <a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> <a class="code" href="dma_8c.html#7856fd2b7ad20b0d7e189c8c52bd420e">countPort</a>[8] = { 0x01, 0x03, 0x05, 0x07, 0xC2, 0xC6, 0xCA, 0xCE };
<a name="l00043"></a>00043
<a name="l00044"></a><a class="code" href="dma_8c.html#7e2aa65e3e12777006ad192f7ff8bb5a">00044</a> <span class="keywordtype">void</span> <a class="code" href="dma_8h.html#7e2aa65e3e12777006ad192f7ff8bb5a">dmaXfer</a>(<a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> channel,<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> address,<a class="code" href="types_8h.html#87d141052bcd5ec8a80812a565c70369">uInt</a> length,<a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> <a class="code" href="gen__calls_8h.html#5eff3a25d417fafce7c4f211db219ca2">read</a>) {
<a name="l00045"></a>00045 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> page=0, mode=0;
<a name="l00046"></a>00046 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> offset = 0;
<a name="l00047"></a>00047 <span class="keywordflow">if</span> (read) {
<a name="l00048"></a>00048 mode = 0x48 + channel;
<a name="l00049"></a>00049 }
<a name="l00050"></a>00050 <span class="keywordflow">else</span> {
<a name="l00051"></a>00051 mode = 0x44 + channel;
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053 page = address >> 16;
<a name="l00054"></a>00054 offset = address & 0xFFFF;
<a name="l00055"></a>00055 length--;
<a name="l00056"></a>00056 <a class="code" href="dma_8h.html#e136d2bd6481a13de8e96f5a583c45eb">_dmaXfer</a>(channel, page, offset, length, mode);
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a><a class="code" href="dma_8c.html#e136d2bd6481a13de8e96f5a583c45eb">00059</a> <span class="keywordtype">void</span> <a class="code" href="dma_8h.html#e136d2bd6481a13de8e96f5a583c45eb">_dmaXfer</a>(<a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> dmaChannel,<a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> page,<a class="code" href="types_8h.html#87d141052bcd5ec8a80812a565c70369">uInt</a> offset,<a class="code" href="types_8h.html#87d141052bcd5ec8a80812a565c70369">uInt</a> length,<a class="code" href="types_8h.html#a4e0f27a9aca905e340c06d2dcae843c">uInt8</a> mode) {
<a name="l00060"></a>00060 <span class="comment">//asm("cli");</span>
<a name="l00061"></a>00061 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="dma_8c.html#8c07d2b2e2c5790ec43ea5b534db08ae">maskReg</a>[dmaChannel], 0x04 | dmaChannel);
<a name="l00062"></a>00062 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="dma_8c.html#0958d78130405d2a49b1daace7f59db7">clearReg</a>[dmaChannel], 0x00);
<a name="l00063"></a>00063 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="dma_8c.html#28967b638d408de9a6469f8501c2f60c">modeReg</a>[dmaChannel], mode);
<a name="l00064"></a>00064 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="dma_8c.html#86470f16b06e0b7c17961d074c124550">addrPort</a>[dmaChannel], <a class="code" href="dma_8c.html#19a055e908717e6f71f285bc5c84ea45">lowByte</a>(offset));
<a name="l00065"></a>00065 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="dma_8c.html#86470f16b06e0b7c17961d074c124550">addrPort</a>[dmaChannel], <a class="code" href="dma_8c.html#d03cbb59aaf2eea05907807a12936e7f">highByte</a>(offset));
<a name="l00066"></a>00066 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="dma_8c.html#9aa538f8203541a3c3bfc668a75d3e5f">pagePort</a>[dmaChannel], page);
<a name="l00067"></a>00067 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="dma_8c.html#7856fd2b7ad20b0d7e189c8c52bd420e">countPort</a>[dmaChannel], <a class="code" href="dma_8c.html#19a055e908717e6f71f285bc5c84ea45">lowByte</a>(length));
<a name="l00068"></a>00068 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="dma_8c.html#7856fd2b7ad20b0d7e189c8c52bd420e">countPort</a>[dmaChannel], <a class="code" href="dma_8c.html#d03cbb59aaf2eea05907807a12936e7f">highByte</a>(length));
<a name="l00069"></a>00069 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="dma_8c.html#8c07d2b2e2c5790ec43ea5b534db08ae">maskReg</a>[dmaChannel], dmaChannel);
<a name="l00070"></a>00070 <span class="comment">//asm("sti");</span>
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="comment">/***</span>
<a name="l00074"></a>00074 <span class="comment"> END</span>
<a name="l00075"></a>00075 <span class="comment"> ***/</span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Fri Dec 15 11:18:55 2006 for UbixOS V2 by
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