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<div class="title">setpageattributes.c</div> </div>
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<a href="setpageattributes_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*-</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2002-2018 The UbixOS Project.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This was developed by Christopher W. Olsen for the UbixOS Project.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification, are permitted</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * provided that the following conditions are met:</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * 1) Redistributions of source code must retain the above copyright notice, this list of</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * conditions, the following disclaimer and the list of authors.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * 2) Redistributions in binary form must reproduce the above copyright notice, this list of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * conditions, the following disclaimer and the list of authors in the documentation and/or</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * other materials provided with the distribution.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * 3) Neither the name of the UbixOS Project nor the names of its contributors may be used to</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * endorse or promote products derived from this software without specific prior written</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * permission.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="code" href="vmm_8h.html">vmm/vmm.h</a>></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="kpanic_8h.html">ubixos/kpanic.h</a>></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  </div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">/************************************************************************</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"></span> </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> Function: void vmm_setPageAttributes(uInt32 pageAddr,int attributes;</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> Description: This Function Will Set The Page Attributes Such As</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> A Read Only Page, Stack Page, COW Page, ETC.</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> Notes:</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"></span> </div>
<div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="setpageattributes_8c.html#a7900e6837133f7d21ac4d2152afb1d63"> 39</a></span> <span class="comment"> ************************************************************************/</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="keywordtype">int</span> <a class="code" href="setpageattributes_8c.html#a7900e6837133f7d21ac4d2152afb1d63">vmm_setPageAttributes</a>(<a class="code" href="include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> memAddr, <a class="code" href="include_2sys_2types_8h.html#a281b4b5562236420969a830503b0ba19">uint16_t</a> attributes) {</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <a class="code" href="include_2sys_2types_8h.html#a281b4b5562236420969a830503b0ba19">uint16_t</a> directoryIndex = 0x0, tableIndex = 0x0;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <a class="code" href="include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> *pageTable = 0x0;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="comment">/* Calculate The Page Directory Index */</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  directoryIndex = (memAddr >> 22);</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">/* Calculate The Page Table Index */</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  tableIndex = ((memAddr >> 12) & 0x3FF);</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="comment">/* Set Table Pointer */</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">if</span> ((pageTable = (<a class="code" href="include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> *) (<a class="code" href="paging_8h.html#a8d42a9a09d9dea53cab3044f51482acc">PT_BASE_ADDR</a> + (0x1000 * directoryIndex))) == 0x0)</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <a class="code" href="armv6_2kpanic_8c.html#adb9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"Error: pageTable == NULL, File: %s, Line: %i\n"</span>, __FILE__, __LINE__);</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">/* Set Attribute If Page Is Mapped */</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">if</span> (pageTable[tableIndex] != 0x0)</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  pageTable[tableIndex] = ((pageTable[tableIndex] & 0xFFFFF000) | attributes);</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  </div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">/* Reload The Page Table; */</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keyword">asm</span> <span class="keyword">volatile</span>(</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="stringliteral">"push %eax \n"</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="stringliteral">"movl %cr3,%eax\n"</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="stringliteral">"movl %eax,%cr3\n"</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="stringliteral">"pop %eax \n"</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  );</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="comment">/* Return */</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">return</span> (0x0);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> }</div>
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<div class="ttc" id="aarmv6_2kpanic_8c_html_adb9a182aa071791a306163d50d653deb"><div class="ttname"><a href="armv6_2kpanic_8c.html#adb9a182aa071791a306163d50d653deb">kpanic</a></div><div class="ttdeci">void kpanic(const char *fmt,...)</div><div class="ttdoc">print panic message and halt system</div><div class="ttdef"><b>Definition:</b> <a href="armv6_2kpanic_8c_source.html#l00041">kpanic.c:41</a></div></div>
<div class="ttc" id="ainclude_2sys_2types_8h_html_a281b4b5562236420969a830503b0ba19"><div class="ttname"><a href="include_2sys_2types_8h.html#a281b4b5562236420969a830503b0ba19">uint16_t</a></div><div class="ttdeci">__uint16_t uint16_t</div><div class="ttdef"><b>Definition:</b> <a href="include_2sys_2types_8h_source.html#l00045">types.h:45</a></div></div>
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