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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_b87deefade4e886319aa926bd3ba1491.html">vmm</a></div>
<h1>setpageattributes.c</h1><a href="setpageattributes_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 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: setpageattributes_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="vmm_8h.html">vmm/vmm.h</a>></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <<a class="code" href="kpanic_8h.html">ubixos/kpanic.h</a>></span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="comment">/************************************************************************</span>
<a name="l00034"></a>00034 <span class="comment"></span>
<a name="l00035"></a>00035 <span class="comment">Function: void vmmSetPageAttributes(uInt32 pageAddr,int attributes;</span>
<a name="l00036"></a>00036 <span class="comment">Description: This Function Will Set The Page Attributes Such As</span>
<a name="l00037"></a>00037 <span class="comment"> A Read Only Page, Stack Page, COW Page, ETC.</span>
<a name="l00038"></a>00038 <span class="comment">Notes:</span>
<a name="l00039"></a>00039 <span class="comment"></span>
<a name="l00040"></a>00040 <span class="comment">************************************************************************/</span>
<a name="l00041"></a><a class="code" href="setpageattributes_8c.html#10f37eb25e81ebf7e61fad46949af8e3">00041</a> <span class="keywordtype">int</span> <a class="code" href="paging_8h.html#1913e8607a69ecf446b18fa1cd36c9cc">vmm_setPageAttributes</a>(<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> memAddr,<a class="code" href="types_8h.html#3b65128d2644e9b80cec9a69bfa7e094">uInt16</a> attributes) {
<a name="l00042"></a>00042 <a class="code" href="types_8h.html#3b65128d2644e9b80cec9a69bfa7e094">uInt16</a> directoryIndex = 0x0, tableIndex = 0x0;
<a name="l00043"></a>00043 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *pageTable = 0x0;
<a name="l00044"></a>00044
<a name="l00045"></a>00045 <span class="comment">/* Calculate The Page Directory Index */</span>
<a name="l00046"></a>00046 directoryIndex = (memAddr >> 22);
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="comment">/* Calculate The Page Table Index */</span>
<a name="l00049"></a>00049 tableIndex = ((memAddr >> 12) & 0x3FF);
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="comment">/* Set Table Pointer */</span>
<a name="l00052"></a>00052 <span class="keywordflow">if</span> ((pageTable = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) (<a class="code" href="paging_8h.html#a432d41840ad8a583a7e6af86feece4f">tablesBaseAddress</a> + (0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a> * directoryIndex))) == 0x0)
<a name="l00053"></a>00053 <a class="code" href="kpanic_8h.html#db9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"Error: pageTable == NULL, File: %s, Line: %i\n"</span>,__FILE__,__LINE__);
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="comment">/* Set Attribute If Page Is Mapped */</span>
<a name="l00056"></a>00056 <span class="keywordflow">if</span> (pageTable[tableIndex] != 0x0)
<a name="l00057"></a>00057 pageTable[tableIndex] = ((pageTable[tableIndex] & 0xFFFFF000) | attributes);
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="comment">/* Reload The Page Table; */</span>
<a name="l00060"></a>00060 <span class="keyword">asm</span> <span class="keyword">volatile</span>(
<a name="l00061"></a>00061 <span class="stringliteral">"push %eax \n"</span>
<a name="l00062"></a>00062 <span class="stringliteral">"movl %cr3,%eax\n"</span>
<a name="l00063"></a>00063 <span class="stringliteral">"movl %eax,%cr3\n"</span>
<a name="l00064"></a>00064 <span class="stringliteral">"pop %eax \n"</span>
<a name="l00065"></a>00065 );
<a name="l00066"></a>00066 <span class="comment">/* Return */</span>
<a name="l00067"></a>00067 <span class="keywordflow">return</span>(0x0);
<a name="l00068"></a>00068 }
<a name="l00069"></a>00069
<a name="l00070"></a>00070 <span class="comment">/***</span>
<a name="l00071"></a>00071 <span class="comment"> $Log: setpageattributes_8c-source.html,v $
<a name="l00071"></a>00071 <span class="comment"> Revision 1.7 2006/12/15 17:47:07 reddawg
<a name="l00071"></a>00071 <span class="comment"> Updates
<a name="l00071"></a>00071 <span class="comment"></span>
<a name="l00072"></a>00072 <span class="comment"> Revision 1.1.1.1 2006/06/01 12:46:13 reddawg</span>
<a name="l00073"></a>00073 <span class="comment"> ubix2</span>
<a name="l00074"></a>00074 <span class="comment"></span>
<a name="l00075"></a>00075 <span class="comment"> Revision 1.2 2005/10/12 00:13:38 reddawg</span>
<a name="l00076"></a>00076 <span class="comment"> Removed</span>
<a name="l00077"></a>00077 <span class="comment"></span>
<a name="l00078"></a>00078 <span class="comment"> Revision 1.1.1.1 2005/09/26 17:24:53 reddawg</span>
<a name="l00079"></a>00079 <span class="comment"> no message</span>
<a name="l00080"></a>00080 <span class="comment"></span>
<a name="l00081"></a>00081 <span class="comment"> Revision 1.4 2004/07/28 15:05:43 reddawg</span>
<a name="l00082"></a>00082 <span class="comment"> Major:</span>
<a name="l00083"></a>00083 <span class="comment"> Pages now have strict security enforcement.</span>
<a name="l00084"></a>00084 <span class="comment"> Many null dereferences have been resolved.</span>
<a name="l00085"></a>00085 <span class="comment"> When apps loaded permissions set for pages rw and ro</span>
<a name="l00086"></a>00086 <span class="comment"></span>
<a name="l00087"></a>00087 <span class="comment"> Revision 1.3 2004/07/20 22:29:55 reddawg</span>
<a name="l00088"></a>00088 <span class="comment"> assert: remade assert</span>
<a name="l00089"></a>00089 <span class="comment"></span>
<a name="l00090"></a>00090 <span class="comment"> Revision 1.2 2004/06/10 22:23:56 reddawg</span>
<a name="l00091"></a>00091 <span class="comment"> Volatiles</span>
<a name="l00092"></a>00092 <span class="comment"></span>
<a name="l00093"></a>00093 <span class="comment"> Revision 1.1.1.1 2004/04/15 12:06:53 reddawg</span>
<a name="l00094"></a>00094 <span class="comment"> UbixOS v1.0</span>
<a name="l00095"></a>00095 <span class="comment"></span>
<a name="l00096"></a>00096 <span class="comment"> Revision 1.6 2004/04/13 16:36:34 reddawg</span>
<a name="l00097"></a>00097 <span class="comment"> Changed our copyright, it is all now under a BSD-Style license</span>
<a name="l00098"></a>00098 <span class="comment"></span>
<a name="l00099"></a>00099 <span class="comment"> END</span>
<a name="l00100"></a>00100 <span class="comment"> ***/</span>
<a name="l00101"></a>00101
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Fri Dec 15 11:18:55 2006 for UbixOS V2 by
<a href="http://www.doxygen.org/index.html">
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