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<a class="el" href="dir_897b6a2d7bab147dd1db58381aad3984.html">src</a> » <a class="el" href="dir_832905b1f7f5feaf61a306b40c0ac817.html">sys</a> » <a class="el" href="dir_2f8fc94d4f17c865dd63167e45dee9cf.html">isa</a></div>
<h1>8259.c</h1><a href="8259_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) 2002-2004 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: 8259_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="8259_8h.html">isa/8259.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="kprintf_8h.html">lib/kprintf.h</a>></span>
<a name="l00033"></a>00033
<a name="l00034"></a><a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">00034</a> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> = 0xFFFF;
<a name="l00035"></a>00035
<a name="l00042"></a><a class="code" href="8259_8c.html#8045101c57cc1791817412b1016794b4">00042</a> <span class="keywordtype">int</span> <a class="code" href="8259_8h.html#8045101c57cc1791817412b1016794b4">i8259_init</a>() {
<a name="l00043"></a>00043 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#0195451428bc646f820202dc15f25d9f">mPic</a>, <a class="code" href="8259_8h.html#543896e13206abea73704f0f87f65d7e">icw1</a>); <span class="comment">/* Initialize Master PIC */</span>
<a name="l00044"></a>00044 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#7d4efc593ecc4ace3d92e1f4ee919b99">sPic</a>, <a class="code" href="8259_8h.html#543896e13206abea73704f0f87f65d7e">icw1</a>); <span class="comment">/* Initialize Seconary PIC */</span>
<a name="l00045"></a>00045 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#0195451428bc646f820202dc15f25d9f">mPic</a>+1, <a class="code" href="8259_8h.html#7d84962c1a1c225344a94545309f92fc">mVec</a>); <span class="comment">/* Master Interrup Vector */</span>
<a name="l00046"></a>00046 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#7d4efc593ecc4ace3d92e1f4ee919b99">sPic</a>+1, <a class="code" href="8259_8h.html#2f7f6ebf05739e77a7c20aee806b771c">sVec</a>); <span class="comment">/* Secondary Interrupt Vector */</span>
<a name="l00047"></a>00047 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#0195451428bc646f820202dc15f25d9f">mPic</a>+1, 1<<2); <span class="comment">/* Bitmask for cascade on IRQ 2 */</span>
<a name="l00048"></a>00048 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#7d4efc593ecc4ace3d92e1f4ee919b99">sPic</a>+1, 2); <span class="comment">/* Cascade on IRQ 2 */</span>
<a name="l00049"></a>00049 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#0195451428bc646f820202dc15f25d9f">mPic</a>+1, <a class="code" href="8259_8h.html#16fcea0b8e8fb321710ee3fe0788b2a6">icw4</a>); <span class="comment">/* Finish Primary Initialization */</span>
<a name="l00050"></a>00050 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#7d4efc593ecc4ace3d92e1f4ee919b99">sPic</a>+1, <a class="code" href="8259_8h.html#16fcea0b8e8fb321710ee3fe0788b2a6">icw4</a>); <span class="comment">/* Finish Seconary Initialization */</span>
<a name="l00051"></a>00051 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#b5e84ca4c143a8b9a34b575201aaffd5">mImr</a>, 0xff); <span class="comment">/* Mask All Primary Interrupts */</span>
<a name="l00052"></a>00052 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#13b25eb31f4b435fdb1ed81c10b07315">sImr</a>, 0xff); <span class="comment">/* Mask All Seconary Interrupts */</span>
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="comment">/* Print out the system info for this */</span>
<a name="l00055"></a>00055 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"pic0 - Port: [0x%X]\n"</span>,<a class="code" href="8259_8h.html#0195451428bc646f820202dc15f25d9f">mPic</a>);
<a name="l00056"></a>00056 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"pic1 - Port: [0x%X]\n"</span>,<a class="code" href="8259_8h.html#7d4efc593ecc4ace3d92e1f4ee919b99">sPic</a>);
<a name="l00057"></a>00057
<a name="l00058"></a>00058 <span class="comment">/* Return so the system knows it went well */</span>
<a name="l00059"></a>00059 <span class="keywordflow">return</span>(0x0);
<a name="l00060"></a>00060 }
<a name="l00061"></a>00061
<a name="l00067"></a><a class="code" href="8259_8c.html#49b612db44e9e81ee7bad138264d6e32">00067</a> <span class="keywordtype">void</span> <a class="code" href="8259_8h.html#0ac079c4d770f02e505f4d8569a6960a">irqEnable</a>(<a class="code" href="types_8h.html#f7b042408b9b104606f8a9b5035329f3">u_int16_t</a> irqNo) {
<a name="l00068"></a>00068 <a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> &= ~(1 << irqNo);
<a name="l00069"></a>00069 <span class="keywordflow">if</span> (irqNo >= 8) {
<a name="l00070"></a>00070 <a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> &= ~(1 << 2);
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#0195451428bc646f820202dc15f25d9f">mPic</a>+1, <a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> & 0xFF);
<a name="l00073"></a>00073 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#7d4efc593ecc4ace3d92e1f4ee919b99">sPic</a>+1, (<a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> >> 8) & 0xFF);
<a name="l00074"></a>00074 }
<a name="l00075"></a>00075
<a name="l00081"></a><a class="code" href="8259_8c.html#371dc14d6686c2005baaa0be4b26ab87">00081</a> <span class="keywordtype">void</span> <a class="code" href="8259_8h.html#2b9ec30943ddb0a2ef3bd7ccfd2026c0">irqDisable</a>(<a class="code" href="types_8h.html#f7b042408b9b104606f8a9b5035329f3">u_int16_t</a> irqNo) {
<a name="l00082"></a>00082 <a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> |= (1 << irqNo);
<a name="l00083"></a>00083 <span class="keywordflow">if</span> ((<a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> & 0xFF00)==0xFF00) {
<a name="l00084"></a>00084 <a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> |= (1 << 2);
<a name="l00085"></a>00085 }
<a name="l00086"></a>00086 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#0195451428bc646f820202dc15f25d9f">mPic</a>+1, <a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> & 0xFF);
<a name="l00087"></a>00087 <a class="code" href="io_8h.html#8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(<a class="code" href="8259_8h.html#7d4efc593ecc4ace3d92e1f4ee919b99">sPic</a>+1, (<a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> >> 8) & 0xFF);
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="comment">/***</span>
<a name="l00091"></a>00091 <span class="comment"> END</span>
<a name="l00092"></a>00092 <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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