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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"> $Id$</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="io_8h.html">sys/io.h</a>></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <<a class="code" href="8259_8h.html">isa/8259.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 <span class="preprocessor">#include <<a class="code" href="kprintf_8h.html">lib/kprintf.h</a>></span>
<a name="l00034"></a>00034
<a name="l00035"></a><a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">00035</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="l00036"></a>00036
<a name="l00037"></a>00037 <span class="comment">/************************************************************************</span>
<a name="l00038"></a>00038 <span class="comment"></span>
<a name="l00039"></a>00039 <span class="comment"> Function: int 8259_init()</span>
<a name="l00040"></a>00040 <span class="comment"></span>
<a name="l00041"></a>00041 <span class="comment"> Description: This function will initialize both PICs for all of our IRQs</span>
<a name="l00042"></a>00042 <span class="comment"></span>
<a name="l00043"></a>00043 <span class="comment"> Notes:</span>
<a name="l00044"></a>00044 <span class="comment"></span>
<a name="l00045"></a>00045 <span class="comment">************************************************************************/</span>
<a name="l00046"></a><a class="code" href="8259_8c.html#8045101c57cc1791817412b1016794b4">00046</a> <span class="keywordtype">int</span> <a class="code" href="8259_8h.html#8045101c57cc1791817412b1016794b4">i8259_init</a>() {
<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>, <a class="code" href="8259_8h.html#543896e13206abea73704f0f87f65d7e">icw1</a>); <span class="comment">/* Initialize Master PIC */</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>, <a class="code" href="8259_8h.html#543896e13206abea73704f0f87f65d7e">icw1</a>); <span class="comment">/* Initialize Seconary PIC */</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#7d84962c1a1c225344a94545309f92fc">mVec</a>); <span class="comment">/* Master Interrup Vector */</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#2f7f6ebf05739e77a7c20aee806b771c">sVec</a>); <span class="comment">/* Secondary Interrupt Vector */</span>
<a name="l00051"></a>00051 <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="l00052"></a>00052 <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="l00053"></a>00053 <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="l00054"></a>00054 <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="l00055"></a>00055 <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="l00056"></a>00056 <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="l00057"></a>00057
<a name="l00058"></a>00058 <span class="comment">/* Print out the system info for this */</span>
<a name="l00059"></a>00059 <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="l00060"></a>00060 <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="l00061"></a>00061
<a name="l00062"></a>00062 <span class="comment">/* Return so the system knows it went well */</span>
<a name="l00063"></a>00063 <span class="keywordflow">return</span>(0x0);
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="comment">/************************************************************************</span>
<a name="l00067"></a>00067 <span class="comment"></span>
<a name="l00068"></a>00068 <span class="comment"> Function: int irqEnable()</span>
<a name="l00069"></a>00069 <span class="comment"></span>
<a name="l00070"></a>00070 <span class="comment"> Description: This function is used to turn on an IRQ</span>
<a name="l00071"></a>00071 <span class="comment"></span>
<a name="l00072"></a>00072 <span class="comment"> Notes:</span>
<a name="l00073"></a>00073 <span class="comment"></span>
<a name="l00074"></a>00074 <span class="comment">************************************************************************/</span>
<a name="l00075"></a><a class="code" href="8259_8c.html#0ac079c4d770f02e505f4d8569a6960a">00075</a> <span class="keywordtype">void</span> <a class="code" href="8259_8h.html#0ac079c4d770f02e505f4d8569a6960a">irqEnable</a>(<a class="code" href="types_8h.html#3b65128d2644e9b80cec9a69bfa7e094">uInt16</a> irqNo) {
<a name="l00076"></a>00076 <a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> &= ~(1 << irqNo);
<a name="l00077"></a>00077 <span class="keywordflow">if</span> (irqNo >= 8) {
<a name="l00078"></a>00078 <a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> &= ~(1 << 2);
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080 <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="l00081"></a>00081 <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="l00082"></a>00082 }
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="comment">/************************************************************************</span>
<a name="l00085"></a>00085 <span class="comment"></span>
<a name="l00086"></a>00086 <span class="comment"> Function: int irqDisable()</span>
<a name="l00087"></a>00087 <span class="comment"></span>
<a name="l00088"></a>00088 <span class="comment"> Description: This function is used to turn off an IRQ</span>
<a name="l00089"></a>00089 <span class="comment"></span>
<a name="l00090"></a>00090 <span class="comment"> Notes:</span>
<a name="l00091"></a>00091 <span class="comment"></span>
<a name="l00092"></a>00092 <span class="comment">************************************************************************/</span>
<a name="l00093"></a><a class="code" href="8259_8c.html#2b9ec30943ddb0a2ef3bd7ccfd2026c0">00093</a> <span class="keywordtype">void</span> <a class="code" href="8259_8h.html#2b9ec30943ddb0a2ef3bd7ccfd2026c0">irqDisable</a>(<a class="code" href="types_8h.html#3b65128d2644e9b80cec9a69bfa7e094">uInt16</a> irqNo) {
<a name="l00094"></a>00094 <a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> |= (1 << irqNo);
<a name="l00095"></a>00095 <span class="keywordflow">if</span> ((<a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> & 0xFF00)==0xFF00) {
<a name="l00096"></a>00096 <a class="code" href="8259_8c.html#c1c08e908fa26e3c59fd4989c5290c58">irqMask</a> |= (1 << 2);
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098 <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="l00099"></a>00099 <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="l00100"></a>00100 }
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="comment">/***</span>
<a name="l00103"></a>00103 <span class="comment"> $Log$</span>
<a name="l00104"></a>00104 <span class="comment"> Revision 1.1.1.1 2006/06/01 12:46:12 reddawg</span>
<a name="l00105"></a>00105 <span class="comment"> ubix2</span>
<a name="l00106"></a>00106 <span class="comment"></span>
<a name="l00107"></a>00107 <span class="comment"> Revision 1.2 2005/10/12 00:13:37 reddawg</span>
<a name="l00108"></a>00108 <span class="comment"> Removed</span>
<a name="l00109"></a>00109 <span class="comment"></span>
<a name="l00110"></a>00110 <span class="comment"> Revision 1.1.1.1 2005/09/26 17:23:59 reddawg</span>
<a name="l00111"></a>00111 <span class="comment"> no message</span>
<a name="l00112"></a>00112 <span class="comment"></span>
<a name="l00113"></a>00113 <span class="comment"> Revision 1.5 2004/07/09 13:20:08 reddawg</span>
<a name="l00114"></a>00114 <span class="comment"> Oh yeah duh you can not name functions with numbers</span>
<a name="l00115"></a>00115 <span class="comment"></span>
<a name="l00116"></a>00116 <span class="comment"> Revision 1.4 2004/07/09 13:14:29 reddawg</span>
<a name="l00117"></a>00117 <span class="comment"> 8259: changed init8259 to 8259_init</span>
<a name="l00118"></a>00118 <span class="comment"> Adjusted Startup Routines</span>
<a name="l00119"></a>00119 <span class="comment"></span>
<a name="l00120"></a>00120 <span class="comment"> Revision 1.3 2004/05/20 22:51:09 reddawg</span>
<a name="l00121"></a>00121 <span class="comment"> Cleaned Up Warnings</span>
<a name="l00122"></a>00122 <span class="comment"></span>
<a name="l00123"></a>00123 <span class="comment"> Revision 1.2 2004/05/10 02:23:24 reddawg</span>
<a name="l00124"></a>00124 <span class="comment"> Minor Changes To Source Code To Prepare It For Open Source Release</span>
<a name="l00125"></a>00125 <span class="comment"></span>
<a name="l00126"></a>00126 <span class="comment"> END</span>
<a name="l00127"></a>00127 <span class="comment"> ***/</span>
<a name="l00128"></a>00128
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Tue Dec 12 08:52:05 2006 for UbixOS V2 by
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