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<div class="title">vmm_allocpagetable.c</div> </div>
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<a href="../../de/db8/vmm__allocpagetable_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="preprocessor">#include <<a class="code" href="../../d1/d21/vmm_8h.html">vmm/vmm.h</a>></span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#include <<a class="code" href="../../d4/df4/paging_8h.html">vmm/paging.h</a>></span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="preprocessor">#include <<a class="code" href="../../df/d63/spinlock_8h.html">ubixos/spinlock.h</a>></span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="preprocessor">#include <<a class="code" href="../../da/d66/string_8h.html">string.h</a>></span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>  </div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  </div>
<div class="line"><a name="l00007"></a><span class="lineno"><a class="line" href="../../de/db8/vmm__allocpagetable_8c.html#ab5107978c7d2053460e2d890e4fd6242"> 7</a></span> <span class="keywordtype">int</span> <a class="code" href="../../de/db8/vmm__allocpagetable_8c.html#ab5107978c7d2053460e2d890e4fd6242">vmm_allocPageTable</a>(<a class="code" href="../../d0/d27/include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> pdI, <a class="code" href="../../d0/d27/include_2sys_2types_8h.html#ae438ba74394b14d7b24b6df3b3b8c252">pidType</a> pid) {</div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  <a class="code" href="../../d0/d27/include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> *pageDirectory = <a class="code" href="../../d4/df4/paging_8h.html#a1b0f37794d3da1a86f1df77e503ed98f">PD_BASE_ADDR</a>;</div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  <a class="code" href="../../d0/d27/include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> *pageTable = 0x0;</div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  <span class="keywordflow">if</span> ((pdI >= <a class="code" href="../../d4/df4/paging_8h.html#a91bd4c1c49996222f571b2f53ca00dc4">PD_ENTRIES</a>) || ((pageDirectory[pdI] & <a class="code" href="../../d4/df4/paging_8h.html#a122dfc414a40e260fd35dbe9743db26f">PAGE_PRESENT</a>) == <a class="code" href="../../d4/df4/paging_8h.html#a122dfc414a40e260fd35dbe9743db26f">PAGE_PRESENT</a>))</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  <span class="keywordflow">return</span>(-1);</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  </div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  </div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  <span class="comment">/* Lock The Page Directory So We Dont Collide With Another Thread */</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  <span class="comment">//spinLock(&pdSpinLock);</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  </div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <span class="comment">/* Map Page Table Page Into Page Directory */</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="keywordflow">if</span> ((pdI >= <a class="code" href="../../d4/df4/paging_8h.html#ac96f9536624cb5d2e7634f37fa919c4c">PD_INDEX</a>(<a class="code" href="../../d1/d21/vmm_8h.html#ad43d15bd90c1980dae3db013c1a5abb0">VMM_USER_START</a>)) && (pdI <= <a class="code" href="../../d4/df4/paging_8h.html#ac96f9536624cb5d2e7634f37fa919c4c">PD_INDEX</a>(<a class="code" href="../../d1/d21/vmm_8h.html#a71bd5e4901787995ae8f9cc3e1a888f9">VMM_USER_END</a>)))</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  pageDirectory[pdI] = (<a class="code" href="../../d0/d27/include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a>) <a class="code" href="../../d1/d21/vmm_8h.html#ab8e4e189a7b1df2a03072ce5b75c89fe">vmm_findFreePage</a>(pid) | <a class="code" href="../../d4/df4/paging_8h.html#af0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a>;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  pageDirectory[pdI] = (<a class="code" href="../../d0/d27/include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a>) <a class="code" href="../../d1/d21/vmm_8h.html#ab8e4e189a7b1df2a03072ce5b75c89fe">vmm_findFreePage</a>(pid) | <a class="code" href="../../d4/df4/paging_8h.html#a8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  </div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="comment">/* Map Page Table To Virtual Space So We Can Easily Manipulate It */</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  pageTable = (<a class="code" href="../../d0/d27/include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> *) (<a class="code" href="../../d4/df4/paging_8h.html#a8d42a9a09d9dea53cab3044f51482acc">PT_BASE_ADDR</a> + (<a class="code" href="../../d4/df4/paging_8h.html#ac96f9536624cb5d2e7634f37fa919c4c">PD_INDEX</a>( <a class="code" href="../../d4/df4/paging_8h.html#a8d42a9a09d9dea53cab3044f51482acc">PT_BASE_ADDR</a> ) * <a class="code" href="../../d4/df4/paging_8h.html#a7d467c1d283fdfa1f2081ba1e0d01b6e">PAGE_SIZE</a>));</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  </div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keywordflow">if</span> ((pageTable[pdI] & <a class="code" href="../../d4/df4/paging_8h.html#a122dfc414a40e260fd35dbe9743db26f">PAGE_PRESENT</a>) == <a class="code" href="../../d4/df4/paging_8h.html#a122dfc414a40e260fd35dbe9743db26f">PAGE_PRESENT</a>)</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <a class="code" href="../../dc/d94/armv6_2kpanic_8c.html#adb9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"How did this happen"</span>);</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  pageTable[pdI] = pageDirectory[pdI];</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">/* Reload Page Directory */</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">asm</span>(</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="stringliteral">"movl %cr3,%eax\n"</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="stringliteral">"movl %eax,%cr3\n"</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  );</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="comment">/* Clean The Page */</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  pageTable = (<a class="code" href="../../d0/d27/include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a> *) (<a class="code" href="../../d4/df4/paging_8h.html#a8d42a9a09d9dea53cab3044f51482acc">PT_BASE_ADDR</a> + (pdI * <a class="code" href="../../d4/df4/paging_8h.html#a7d467c1d283fdfa1f2081ba1e0d01b6e">PAGE_SIZE</a>));</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <a class="code" href="../../d5/d82/gpt_8h.html#a310ac455ac45de9713bd7dcb0b5500ad">bzero</a>(pageTable, <a class="code" href="../../d4/df4/paging_8h.html#a7d467c1d283fdfa1f2081ba1e0d01b6e">PAGE_SIZE</a>);</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">//spinUnlock(&pdSpinLock);</span></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="keywordflow">return</span>(0x0);</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  </div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> }</div>
</div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<div class="ttc" id="aspinlock_8h_html"><div class="ttname"><a href="../../df/d63/spinlock_8h.html">spinlock.h</a></div></div>
<div class="ttc" id="avmm__allocpagetable_8c_html_ab5107978c7d2053460e2d890e4fd6242"><div class="ttname"><a href="../../de/db8/vmm__allocpagetable_8c.html#ab5107978c7d2053460e2d890e4fd6242">vmm_allocPageTable</a></div><div class="ttdeci">int vmm_allocPageTable(uint32_t pdI, pidType pid)</div><div class="ttdef"><b>Definition:</b> <a href="../../de/db8/vmm__allocpagetable_8c_source.html#l00007">vmm_allocpagetable.c:7</a></div></div>
<div class="ttc" id="astring_8h_html"><div class="ttname"><a href="../../da/d66/string_8h.html">string.h</a></div></div>
<div class="ttc" id="avmm_8h_html"><div class="ttname"><a href="../../d1/d21/vmm_8h.html">vmm.h</a></div></div>
<div class="ttc" id="aarmv6_2kpanic_8c_html_adb9a182aa071791a306163d50d653deb"><div class="ttname"><a href="../../dc/d94/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="../../dc/d94/armv6_2kpanic_8c_source.html#l00041">kpanic.c:41</a></div></div>
<div class="ttc" id="agpt_8h_html_a310ac455ac45de9713bd7dcb0b5500ad"><div class="ttname"><a href="../../d5/d82/gpt_8h.html#a310ac455ac45de9713bd7dcb0b5500ad">bzero</a></div><div class="ttdeci">#define bzero(buf, size)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d82/gpt_8h_source.html#l00037">gpt.h:37</a></div></div>
<div class="ttc" id="avmm_8h_html_ab8e4e189a7b1df2a03072ce5b75c89fe"><div class="ttname"><a href="../../d1/d21/vmm_8h.html#ab8e4e189a7b1df2a03072ce5b75c89fe">vmm_findFreePage</a></div><div class="ttdeci">uint32_t vmm_findFreePage(pidType pid)</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/db5/vmm__memory_8c_source.html#l00221">vmm_memory.c:221</a></div></div>
<div class="ttc" id="apaging_8h_html_ac96f9536624cb5d2e7634f37fa919c4c"><div class="ttname"><a href="../../d4/df4/paging_8h.html#ac96f9536624cb5d2e7634f37fa919c4c">PD_INDEX</a></div><div class="ttdeci">#define PD_INDEX(v_addr)</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/df4/paging_8h_source.html#l00040">paging.h:40</a></div></div>
<div class="ttc" id="apaging_8h_html_af0fff7a38cd2c7a32d580787423b94ea"><div class="ttname"><a href="../../d4/df4/paging_8h.html#af0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a></div><div class="ttdeci">#define PAGE_DEFAULT</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/df4/paging_8h_source.html#l00068">paging.h:68</a></div></div>
<div class="ttc" id="apaging_8h_html"><div class="ttname"><a href="../../d4/df4/paging_8h.html">paging.h</a></div></div>
<div class="ttc" id="apaging_8h_html_a1b0f37794d3da1a86f1df77e503ed98f"><div class="ttname"><a href="../../d4/df4/paging_8h.html#a1b0f37794d3da1a86f1df77e503ed98f">PD_BASE_ADDR</a></div><div class="ttdeci">#define PD_BASE_ADDR</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/df4/paging_8h_source.html#l00045">paging.h:45</a></div></div>
<div class="ttc" id="ainclude_2sys_2types_8h_html_a0238af00180b6d9278fa1c6aa790fdf4"><div class="ttname"><a href="../../d0/d27/include_2sys_2types_8h.html#a0238af00180b6d9278fa1c6aa790fdf4">uint32_t</a></div><div class="ttdeci">__uint32_t uint32_t</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d27/include_2sys_2types_8h_source.html#l00046">types.h:46</a></div></div>
<div class="ttc" id="ainclude_2sys_2types_8h_html_ae438ba74394b14d7b24b6df3b3b8c252"><div class="ttname"><a href="../../d0/d27/include_2sys_2types_8h.html#ae438ba74394b14d7b24b6df3b3b8c252">pidType</a></div><div class="ttdeci">int pidType</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d27/include_2sys_2types_8h_source.html#l00075">types.h:75</a></div></div>
<div class="ttc" id="avmm_8h_html_ad43d15bd90c1980dae3db013c1a5abb0"><div class="ttname"><a href="../../d1/d21/vmm_8h.html#ad43d15bd90c1980dae3db013c1a5abb0">VMM_USER_START</a></div><div class="ttdeci">#define VMM_USER_START</div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d21/vmm_8h_source.html#l00058">vmm.h:58</a></div></div>
<div class="ttc" id="apaging_8h_html_a91bd4c1c49996222f571b2f53ca00dc4"><div class="ttname"><a href="../../d4/df4/paging_8h.html#a91bd4c1c49996222f571b2f53ca00dc4">PD_ENTRIES</a></div><div class="ttdeci">#define PD_ENTRIES</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/df4/paging_8h_source.html#l00048">paging.h:48</a></div></div>
<div class="ttc" id="apaging_8h_html_a7d467c1d283fdfa1f2081ba1e0d01b6e"><div class="ttname"><a href="../../d4/df4/paging_8h.html#a7d467c1d283fdfa1f2081ba1e0d01b6e">PAGE_SIZE</a></div><div class="ttdeci">#define PAGE_SIZE</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/df4/paging_8h_source.html#l00037">paging.h:37</a></div></div>
<div class="ttc" id="apaging_8h_html_a8b838cda4f0bc79ab8d07eb19dd35420"><div class="ttname"><a href="../../d4/df4/paging_8h.html#a8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a></div><div class="ttdeci">#define KERNEL_PAGE_DEFAULT</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/df4/paging_8h_source.html#l00069">paging.h:69</a></div></div>
<div class="ttc" id="avmm_8h_html_a71bd5e4901787995ae8f9cc3e1a888f9"><div class="ttname"><a href="../../d1/d21/vmm_8h.html#a71bd5e4901787995ae8f9cc3e1a888f9">VMM_USER_END</a></div><div class="ttdeci">#define VMM_USER_END</div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d21/vmm_8h_source.html#l00059">vmm.h:59</a></div></div>
<div class="ttc" id="apaging_8h_html_a8d42a9a09d9dea53cab3044f51482acc"><div class="ttname"><a href="../../d4/df4/paging_8h.html#a8d42a9a09d9dea53cab3044f51482acc">PT_BASE_ADDR</a></div><div class="ttdeci">#define PT_BASE_ADDR</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/df4/paging_8h_source.html#l00046">paging.h:46</a></div></div>
<div class="ttc" id="apaging_8h_html_a122dfc414a40e260fd35dbe9743db26f"><div class="ttname"><a href="../../d4/df4/paging_8h.html#a122dfc414a40e260fd35dbe9743db26f">PAGE_PRESENT</a></div><div class="ttdeci">#define PAGE_PRESENT</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/df4/paging_8h_source.html#l00055">paging.h:55</a></div></div>
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