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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>paging.c</h1><a href="paging_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: paging_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="kprintf_8h.html">lib/kprintf.h</a>></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <<a class="code" href="kmalloc_8h.html">lib/kmalloc.h</a>></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <<a class="code" href="types_8h.html">ubixos/types.h</a>></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include <<a class="code" href="kpanic_8h.html">ubixos/kpanic.h</a>></span>
<a name="l00035"></a>00035 <span class="preprocessor">#include <<a class="code" href="sched_8h.html">ubixos/sched.h</a>></span>
<a name="l00036"></a>00036 <span class="preprocessor">#include <<a class="code" href="spinlock_8h.html">ubixos/spinlock.h</a>></span>
<a name="l00037"></a>00037 <span class="preprocessor">#include <<a class="code" href="string_8h.html">string.h</a>></span>
<a name="l00038"></a>00038 <span class="preprocessor">#include <<a class="code" href="assert_8h.html">assert.h</a>></span>
<a name="l00039"></a>00039
<a name="l00040"></a><a class="code" href="paging_8c.html#4e81de2626825c90dc6bb3cd7c8b344c">00040</a> <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *<a class="code" href="paging_8h.html#4e81de2626825c90dc6bb3cd7c8b344c">kernelPageDirectory</a> = 0x0;
<a name="l00041"></a>00041
<a name="l00042"></a>00042
<a name="l00043"></a><a class="code" href="paging_8c.html#fe74a297627a1834d20925533b77c3d8">00043</a> <span class="keyword">static</span> <a class="code" href="spinlock_8h.html#a240e9404b4ede1e0d714610080d1176">spinLock_t</a> <a class="code" href="paging_8c.html#fe74a297627a1834d20925533b77c3d8">fkpSpinLock</a> = <a class="code" href="spinlock_8h.html#0fe85a4f3642683148b25916d6c5eafd">SPIN_LOCK_INITIALIZER</a>;
<a name="l00044"></a><a class="code" href="paging_8c.html#79ee934bb85cf9e184c2ad54b707f9db">00044</a> <span class="keyword">static</span> <a class="code" href="spinlock_8h.html#a240e9404b4ede1e0d714610080d1176">spinLock_t</a> <a class="code" href="paging_8c.html#79ee934bb85cf9e184c2ad54b707f9db">rmpSpinLock</a> = <a class="code" href="spinlock_8h.html#0fe85a4f3642683148b25916d6c5eafd">SPIN_LOCK_INITIALIZER</a>;
<a name="l00045"></a>00045
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="comment">/*****************************************************************************************</span>
<a name="l00048"></a>00048 <span class="comment"> Function: int vmm_pagingInit();</span>
<a name="l00049"></a>00049 <span class="comment"></span>
<a name="l00050"></a>00050 <span class="comment"> Description: This Function Will Initialize The Operating Systems Paging</span>
<a name="l00051"></a>00051 <span class="comment"> Abilities.</span>
<a name="l00052"></a>00052 <span class="comment"></span>
<a name="l00053"></a>00053 <span class="comment"> Notes:</span>
<a name="l00054"></a>00054 <span class="comment"> 02/20/2004 - Looked Over Code And Have Approved Its Quality</span>
<a name="l00055"></a>00055 <span class="comment"> 07/28/3004 - All pages are set for ring-0 only no more user accessable</span>
<a name="l00056"></a>00056 <span class="comment"></span>
<a name="l00057"></a>00057 <span class="comment">*****************************************************************************************/</span>
<a name="l00058"></a>00058
<a name="l00059"></a><a class="code" href="paging_8c.html#f47a45e3f0802f5aac053808127aaaf1">00059</a> <span class="keywordtype">int</span> <a class="code" href="paging_8h.html#f47a45e3f0802f5aac053808127aaaf1">vmm_pagingInit</a>(){
<a name="l00060"></a>00060 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> i = 0x0;
<a name="l00061"></a>00061 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *pageTable = 0x0;
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="comment">/* Allocate A Page Of Memory For Kernels Page Directory */</span>
<a name="l00064"></a>00064 <a class="code" href="paging_8h.html#4e81de2626825c90dc6bb3cd7c8b344c">kernelPageDirectory</a> = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="vmm_8h.html#976cf3919bf7c77c868021ec9374593b">vmmFindFreePage</a>(<a class="code" href="kmalloc_8h.html#81d09bc848b49133401b3efeeb65f1af">sysID</a>);
<a name="l00065"></a>00065 <span class="keywordflow">if</span> (<a class="code" href="paging_8h.html#4e81de2626825c90dc6bb3cd7c8b344c">kernelPageDirectory</a> == 0x0) {
<a name="l00066"></a>00066 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"Error: vmmFindFreePage Failed"</span>);
<a name="l00067"></a>00067 <span class="keywordflow">return</span> (0<a class="code" href="ap-boot_8S.html#1a3ac2137e21f6f0d400f1996914dd19">x1</a>);
<a name="l00068"></a>00068 } <span class="comment">/* end if */</span>
<a name="l00069"></a>00069
<a name="l00070"></a>00070 <span class="comment">/* Clear The Memory To Ensure There Is No Garbage */</span>
<a name="l00071"></a>00071 <span class="keywordflow">for</span> (i = 0; i < <a class="code" href="paging_8h.html#b80d68a13753e40b0df8e0dc0c4af870">pageEntries</a>; i++) {
<a name="l00072"></a>00072 (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) <a class="code" href="paging_8h.html#4e81de2626825c90dc6bb3cd7c8b344c">kernelPageDirectory</a>[i] = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) 0x0;
<a name="l00073"></a>00073 } <span class="comment">/* end for */</span>
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="comment">/* Allocate a page for the first 4MB of memory */</span>
<a name="l00076"></a>00076 <span class="keywordflow">if</span> ((pageTable = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="vmm_8h.html#976cf3919bf7c77c868021ec9374593b">vmmFindFreePage</a>(<a class="code" href="kmalloc_8h.html#81d09bc848b49133401b3efeeb65f1af">sysID</a>)) == 0x0)
<a name="l00077"></a>00077 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"Error: vmmFindFreePage Failed"</span>);
<a name="l00078"></a>00078 <a class="code" href="paging_8h.html#4e81de2626825c90dc6bb3cd7c8b344c">kernelPageDirectory</a>[0] = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) ((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) (pageTable) | <a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>);
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="comment">/* Make Sure The Page Table Is Clean */</span>
<a name="l00081"></a>00081 <a class="code" href="lib_2string_8h.html#ce4b911463887af5e748326323e99a23">memset</a>(pageTable,0x0,0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>);
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="comment">/*</span>
<a name="l00084"></a>00084 <span class="comment"> * Map the first 1MB of Memory to the kernel MM space because our kernel starts</span>
<a name="l00085"></a>00085 <span class="comment"> * at 0x30000</span>
<a name="l00086"></a>00086 <span class="comment"> * Do not map page at address 0x0 this is reserved for null...</span>
<a name="l00087"></a>00087 <span class="comment"> */</span>
<a name="l00088"></a>00088 <span class="keywordflow">for</span> (i = 0<a class="code" href="ap-boot_8S.html#1a3ac2137e21f6f0d400f1996914dd19">x1</a>; i < (pageEntries / 0x4); i++) {
<a name="l00089"></a>00089 pageTable[i] = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) ((i * 0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>) | <a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>);
<a name="l00090"></a>00090 } <span class="comment">/* end for */</span>
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="comment">/*</span>
<a name="l00093"></a>00093 <span class="comment"> * Create page tables for the top 1GB of VM space. This space is set aside</span>
<a name="l00094"></a>00094 <span class="comment"> * for kernel space and will be shared with each process</span>
<a name="l00095"></a>00095 <span class="comment"> */</span>
<a name="l00096"></a>00096 <span class="keywordflow">for</span> (i = 768; i < pageEntries; i++) {
<a name="l00097"></a>00097 <span class="keywordflow">if</span> ((pageTable = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="vmm_8h.html#976cf3919bf7c77c868021ec9374593b">vmmFindFreePage</a>(sysID)) == 0x0)
<a name="l00098"></a>00098 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"Error: vmmFindFreePage Failed"</span>);
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="comment">/* Make Sure The Page Table Is Clean */</span>
<a name="l00101"></a>00101 <a class="code" href="lib_2string_8h.html#ce4b911463887af5e748326323e99a23">memset</a>(pageTable,0x0,0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>);
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="comment">/* Map In The Page Directory */</span>
<a name="l00104"></a>00104 <a class="code" href="paging_8h.html#4e81de2626825c90dc6bb3cd7c8b344c">kernelPageDirectory</a>[i] = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) ((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) (pageTable) | <a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>);
<a name="l00105"></a>00105 } <span class="comment">/* end for */</span>
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="comment">/* Set Up Memory To Be All The Allocated Page Directories */</span>
<a name="l00108"></a>00108 <span class="keywordflow">if</span> ((pageTable = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="vmm_8h.html#976cf3919bf7c77c868021ec9374593b">vmmFindFreePage</a>(sysID)) == 0x0)
<a name="l00109"></a>00109 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"Error: vmmFindFreePage Failed"</span>);
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="comment">/* Clean Page Table */</span>
<a name="l00112"></a>00112 <a class="code" href="lib_2string_8h.html#ce4b911463887af5e748326323e99a23">memset</a>(pageTable,0x0,0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>);
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <a class="code" href="paging_8h.html#4e81de2626825c90dc6bb3cd7c8b344c">kernelPageDirectory</a>[767] = ((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) pageTable | <a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>);
<a name="l00115"></a>00115 <span class="keywordflow">for</span> (i = 0; i < pageEntries; i++) {
<a name="l00116"></a>00116 pageTable[i] = <a class="code" href="paging_8h.html#4e81de2626825c90dc6bb3cd7c8b344c">kernelPageDirectory</a>[i];
<a name="l00117"></a>00117 } <span class="comment">/* end for */</span>
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="comment">/* Also Set Up Page Directory To Be The The First Page In 0xE0400000 */</span>
<a name="l00120"></a>00120 pageTable = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) (<a class="code" href="paging_8h.html#4e81de2626825c90dc6bb3cd7c8b344c">kernelPageDirectory</a>[0] & 0xFFFFF000);
<a name="l00121"></a>00121 pageTable[256] = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) ((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) (<a class="code" href="paging_8h.html#4e81de2626825c90dc6bb3cd7c8b344c">kernelPageDirectory</a>) | <a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>);
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="comment">/* Now Lets Turn On Paging With This Initial Page Table */</span>
<a name="l00124"></a>00124 <span class="keyword">asm</span> <span class="keyword">volatile</span>(
<a name="l00125"></a>00125 <span class="stringliteral">"movl %0,%%eax \n"</span>
<a name="l00126"></a>00126 <span class="stringliteral">"movl %%eax,%%cr3 \n"</span>
<a name="l00127"></a>00127 <span class="stringliteral">"movl %%cr0,%%eax \n"</span>
<a name="l00128"></a>00128 <span class="stringliteral">"orl $0x80010000,%%eax \n"</span> <span class="comment">/* Turn on memory protection */</span>
<a name="l00129"></a>00129 <span class="stringliteral">"movl %%eax,%%cr0 \n"</span>
<a name="l00130"></a>00130 :
<a name="l00131"></a>00131 : <span class="stringliteral">"d"</span>((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) (kernelPageDirectory))
<a name="l00132"></a>00132 );
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="comment">/* Remap The Memory List */</span>
<a name="l00135"></a>00135 <span class="keywordflow">for</span> (i = 0x101000; i <= (0x101000 + (<a class="code" href="vmm_8h.html#2b0091bdc36e32af3daf9cfcaa7c04e1">numPages</a> * <span class="keyword">sizeof</span>(<a class="code" href="structmMap.html">mMap</a>))); i += 0x1000) {
<a name="l00136"></a>00136 <span class="keywordflow">if</span> ((<a class="code" href="paging_8h.html#a05f8d8947fb5bcec87fc6661f83243e">vmm_remapPage</a>(i, (<a class="code" href="vmm_8h.html#e6d4c286bb58576d1802a2c7d92e698e">vmmMemoryMapAddr</a> + (i - 0x101000)),<a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>)) == 0x0)
<a name="l00137"></a>00137 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"vmmRemapPage failed\n"</span>);
<a name="l00138"></a>00138 }
<a name="l00139"></a>00139 <span class="comment">/* Set New Address For Memory Map Since Its Relocation */</span>
<a name="l00140"></a>00140 <a class="code" href="vmm_8h.html#89e87741958ee81f1811075b25af058a">vmmMemoryMap</a> = (<a class="code" href="structmMap.html">mMap</a> *) <a class="code" href="vmm_8h.html#e6d4c286bb58576d1802a2c7d92e698e">vmmMemoryMapAddr</a>;
<a name="l00141"></a>00141
<a name="l00142"></a>00142 <span class="comment">/* Print information on paging */</span>
<a name="l00143"></a>00143 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"paging0 - Address: [0x%X], PagingISR Address: [0x%X]\n"</span>, kernelPageDirectory, &<a class="code" href="page__fault_8S.html#6091cb277c1dd3e3e4d1d4699f3b06e5">_vmm_pageFault</a>);
<a name="l00144"></a>00144
<a name="l00145"></a>00145 <span class="comment">/* Return so we know everything went well */</span>
<a name="l00146"></a>00146 <span class="keywordflow">return</span> (0x0);
<a name="l00147"></a>00147 } <span class="comment">/* END */</span>
<a name="l00148"></a>00148
<a name="l00149"></a>00149 <span class="comment">/*****************************************************************************************</span>
<a name="l00150"></a>00150 <span class="comment"> Function: int vmmRemapPage(Physical Source,Virtual Destination)</span>
<a name="l00151"></a>00151 <span class="comment"> </span>
<a name="l00152"></a>00152 <span class="comment"> Description: This Function Will Remap A Physical Page Into Virtual Space</span>
<a name="l00153"></a>00153 <span class="comment"> </span>
<a name="l00154"></a>00154 <span class="comment"> Notes:</span>
<a name="l00155"></a>00155 <span class="comment"> 07/29/02 - Rewrote This To Work With Our New Paging System</span>
<a name="l00156"></a>00156 <span class="comment"> 07/30/02 - Changed Address Of Page Tables And Page Directory</span>
<a name="l00157"></a>00157 <span class="comment"> 07/28/04 - If perms == 0x0 set to PAGE_DEFAULT</span>
<a name="l00158"></a>00158 <span class="comment"></span>
<a name="l00159"></a>00159 <span class="comment">*****************************************************************************************/</span>
<a name="l00160"></a><a class="code" href="paging_8c.html#f055cfbfef9c5d8dd82aa83829a06117">00160</a> <span class="keywordtype">int</span> <a class="code" href="paging_8h.html#a05f8d8947fb5bcec87fc6661f83243e">vmm_remapPage</a>(<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> source,<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> dest,<a class="code" href="types_8h.html#3b65128d2644e9b80cec9a69bfa7e094">uInt16</a> perms)
<a name="l00161"></a>00161 {
<a name="l00162"></a>00162 <a class="code" href="types_8h.html#3b65128d2644e9b80cec9a69bfa7e094">uInt16</a> destPageDirectoryIndex = 0x0, destPageTableIndex = 0x0;
<a name="l00163"></a>00163 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *pageDir = 0x0, *pageTable = 0x0;
<a name="l00164"></a>00164 <span class="keywordtype">short</span> i = 0x0;
<a name="l00165"></a>00165
<a name="l00166"></a>00166 <span class="keywordflow">if</span> (source == 0x0)
<a name="l00167"></a>00167 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"source == 0x0"</span>);
<a name="l00168"></a>00168 <span class="keywordflow">if</span> (dest == 0x0)
<a name="l00169"></a>00169 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"dest == 0x0"</span>);
<a name="l00170"></a>00170
<a name="l00171"></a>00171 <a class="code" href="spinlock_8h.html#2cd9a4502680fb8e7f0fe6b029e558b1">spinLock</a>(&<a class="code" href="paging_8c.html#79ee934bb85cf9e184c2ad54b707f9db">rmpSpinLock</a>);
<a name="l00172"></a>00172 <span class="keywordflow">if</span> (perms == 0x0)
<a name="l00173"></a>00173 perms = <a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>;
<a name="l00174"></a>00174
<a name="l00175"></a>00175 <span class="comment">/*</span>
<a name="l00176"></a>00176 <span class="comment"> * Set Pointer pageDirectory To Point To The Virtual Mapping Of The Page</span>
<a name="l00177"></a>00177 <span class="comment"> * Directory</span>
<a name="l00178"></a>00178 <span class="comment"> */</span>
<a name="l00179"></a>00179 pageDir = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="paging_8h.html#aab3609eb02bd28ded8d1ea0512da979">parentPageDirAddr</a>;
<a name="l00180"></a>00180 <span class="comment">/* Check To See If Page Table Exists */</span>
<a name="l00181"></a>00181 <span class="keywordflow">if</span> (dest == 0x0)
<a name="l00182"></a>00182 <span class="keywordflow">return</span>(0x0);
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="comment">/* Get Index Into The Page Directory */</span>
<a name="l00185"></a>00185 destPageDirectoryIndex = (dest / 0x400000);
<a name="l00186"></a>00186
<a name="l00187"></a>00187 <span class="keywordflow">if</span> ((pageDir[destPageDirectoryIndex] & <a class="code" href="paging_8h.html#122dfc414a40e260fd35dbe9743db26f">PAGE_PRESENT</a>) != PAGE_PRESENT) {
<a name="l00188"></a>00188 <span class="comment">/* If Page Table Is Non Existant Then Set It Up */</span>
<a name="l00189"></a>00189 <span class="comment">/* UBU Why does the page table need to be user writable? */</span>
<a name="l00190"></a>00190 pageDir[destPageDirectoryIndex] = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) <a class="code" href="vmm_8h.html#976cf3919bf7c77c868021ec9374593b">vmmFindFreePage</a>(<a class="code" href="sched_8h.html#54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#30966587a60db6b40c8be6c387e11d81">id</a>) | <a class="code" href="paging_8h.html#f0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a>;
<a name="l00191"></a>00191
<a name="l00192"></a>00192 <span class="comment">/* Also Add It To Virtual Space So We Can Make Changes Later */</span>
<a name="l00193"></a>00193 pageTable = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) (<a class="code" href="paging_8h.html#a432d41840ad8a583a7e6af86feece4f">tablesBaseAddress</a> + 0x2FF000);
<a name="l00194"></a>00194 pageTable[destPageDirectoryIndex] = pageDir[destPageDirectoryIndex];
<a name="l00195"></a>00195 <span class="comment">/* Reload Page Directory */</span>
<a name="l00196"></a>00196 <span class="keyword">asm</span> <span class="keyword">volatile</span>(
<a name="l00197"></a>00197 <span class="stringliteral">"push %eax \n"</span>
<a name="l00198"></a>00198 <span class="stringliteral">"mov %cr3,%eax \n"</span>
<a name="l00199"></a>00199 <span class="stringliteral">"mov %eax,%cr3 \n"</span>
<a name="l00200"></a>00200 <span class="stringliteral">"pop %eax \n"</span>
<a name="l00201"></a>00201 );
<a name="l00202"></a>00202 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> * destPageDirectoryIndex));
<a name="l00203"></a>00203 <span class="keywordflow">for</span> (i = 0x0;i < <a class="code" href="paging_8h.html#b80d68a13753e40b0df8e0dc0c4af870">pageEntries</a>;i++)
<a name="l00204"></a>00204 pageTable[i] = 0x0;
<a name="l00205"></a>00205 }
<a name="l00206"></a>00206 <span class="comment">/* Set Address To Page Table */</span>
<a name="l00207"></a>00207 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> * destPageDirectoryIndex));
<a name="l00208"></a>00208
<a name="l00209"></a>00209 <span class="comment">/* Get The Index To The Page Table */</span>
<a name="l00210"></a>00210 destPageTableIndex = ((dest - (destPageDirectoryIndex * 0x400000)) / 0x1000);
<a name="l00211"></a>00211
<a name="l00212"></a>00212
<a name="l00213"></a>00213 <span class="comment">/* If The Page Is Mapped In Free It Before We Remap */</span>
<a name="l00214"></a>00214 <span class="keywordflow">if</span> ((pageTable[destPageTableIndex] & PAGE_PRESENT) == PAGE_PRESENT) {
<a name="l00215"></a>00215 <span class="keywordflow">if</span> ((pageTable[destPageTableIndex] & <a class="code" href="paging_8h.html#1532db17068ba8d409b8ffe066414af2">PAGE_STACK</a>) == PAGE_STACK)
<a name="l00216"></a>00216 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"Stack Page: [0x%X]\n"</span>,dest);
<a name="l00217"></a>00217
<a name="l00218"></a>00218 <span class="keywordflow">if</span> ((pageTable[destPageTableIndex] & <a class="code" href="paging_8h.html#57d743cb60fe478f6720c42315e7e813">PAGE_COW</a>) != PAGE_COW) {
<a name="l00219"></a>00219 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"Page NOT COW\n"</span>);
<a name="l00220"></a>00220 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"Page Present: [0x%X][0x%X]"</span>,dest,pageTable[destPageTableIndex]);
<a name="l00221"></a>00221 source = 0x0;
<a name="l00222"></a>00222 <span class="keywordflow">goto</span> rmDone;
<a name="l00223"></a>00223 }
<a name="l00224"></a>00224 <span class="comment">/* Clear The Page First For Security Reasons */</span>
<a name="l00225"></a>00225 <a class="code" href="vmm_8h.html#e90be267d851fed04d4d9b1c6c10454a">freePage</a>(((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) pageTable[destPageTableIndex] & 0xFFFFF000));
<a name="l00226"></a>00226 }
<a name="l00227"></a>00227 <span class="comment">/* Set The Source Address In The Destination */</span>
<a name="l00228"></a>00228 pageTable[destPageTableIndex] = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) (source | perms);
<a name="l00229"></a>00229 <span class="comment">/* Reload The Page Table; */</span>
<a name="l00230"></a>00230 <span class="keyword">asm</span> <span class="keyword">volatile</span>(
<a name="l00231"></a>00231 <span class="stringliteral">"push %eax \n"</span>
<a name="l00232"></a>00232 <span class="stringliteral">"movl %cr3,%eax\n"</span>
<a name="l00233"></a>00233 <span class="stringliteral">"movl %eax,%cr3\n"</span>
<a name="l00234"></a>00234 <span class="stringliteral">"pop %eax \n"</span>
<a name="l00235"></a>00235 );
<a name="l00236"></a>00236
<a name="l00237"></a>00237 rmDone:
<a name="l00238"></a>00238 <span class="comment">/* Return */</span>
<a name="l00239"></a>00239 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="paging_8c.html#79ee934bb85cf9e184c2ad54b707f9db">rmpSpinLock</a>);
<a name="l00240"></a>00240 <span class="keywordflow">return</span> (source);
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="comment">/************************************************************************</span>
<a name="l00244"></a>00244 <span class="comment"></span>
<a name="l00245"></a>00245 <span class="comment">Function: void *vmmGetFreeKernelPage(pidType pid);</span>
<a name="l00246"></a>00246 <span class="comment">Description: Returns A Free Page Mapped To The VM Space</span>
<a name="l00247"></a>00247 <span class="comment">Notes:</span>
<a name="l00248"></a>00248 <span class="comment"></span>
<a name="l00249"></a>00249 <span class="comment">07/30/02 - This Returns A Free Page In The Top 1GB For The Kernel</span>
<a name="l00250"></a>00250 <span class="comment"></span>
<a name="l00251"></a>00251 <span class="comment">************************************************************************/</span>
<a name="l00252"></a>00252 <span class="keywordtype">void</span> *
<a name="l00253"></a><a class="code" href="paging_8c.html#30a38035243b9dfb285b3793788126be">00253</a> <a class="code" href="paging_8h.html#30a38035243b9dfb285b3793788126be">vmmGetFreeKernelPage</a>(<a class="code" href="types_8h.html#e438ba74394b14d7b24b6df3b3b8c252">pidType</a> pid, <a class="code" href="types_8h.html#3b65128d2644e9b80cec9a69bfa7e094">uInt16</a> count)
<a name="l00254"></a>00254 {
<a name="l00255"></a>00255 <span class="keywordtype">int</span> x = 0, y = 0, c = 0;
<a name="l00256"></a>00256 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *pageTableSrc = 0x0;
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <a class="code" href="spinlock_8h.html#2cd9a4502680fb8e7f0fe6b029e558b1">spinLock</a>(&<a class="code" href="paging_8c.html#fe74a297627a1834d20925533b77c3d8">fkpSpinLock</a>);
<a name="l00259"></a>00259 <span class="comment">/* Lets Search For A Free Page */</span>
<a name="l00260"></a>00260 <span class="keywordflow">for</span> (x = 768; x < 1024; x++) {
<a name="l00261"></a>00261 <span class="comment">/* Set Page Table Address */</span>
<a name="l00262"></a>00262 pageTableSrc = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) (<a class="code" href="paging_8h.html#a432d41840ad8a583a7e6af86feece4f">tablesBaseAddress</a> + (4096 * x));
<a name="l00263"></a>00263 <span class="keywordflow">for</span> (y = 0; y < 1024; y++) {
<a name="l00264"></a>00264 <span class="comment">/* Loop Through The Page Table Find An UnAllocated Page */</span>
<a name="l00265"></a>00265 <span class="keywordflow">if</span> ((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) pageTableSrc[y] == (uInt32) 0x0) {
<a name="l00266"></a>00266 <span class="keywordflow">if</span> (count > 1) {
<a name="l00267"></a>00267 <span class="keywordflow">for</span> (c = 0; c < count; c++) {
<a name="l00268"></a>00268 <span class="keywordflow">if</span> (y + c < 1024) {
<a name="l00269"></a>00269 <span class="keywordflow">if</span> ((uInt32) pageTableSrc[y + c] != (uInt32) 0x0) {
<a name="l00270"></a>00270 c = -1;
<a name="l00271"></a>00271 <span class="keywordflow">break</span>;
<a name="l00272"></a>00272 }
<a name="l00273"></a>00273 }
<a name="l00274"></a>00274 }
<a name="l00275"></a>00275 <span class="keywordflow">if</span> (c != -1) {
<a name="l00276"></a>00276 <span class="keywordflow">for</span> (c = 0; c < count; c++) {
<a name="l00277"></a>00277 <span class="keywordflow">if</span> ((<a class="code" href="paging_8h.html#a05f8d8947fb5bcec87fc6661f83243e">vmm_remapPage</a>((uInt32) <a class="code" href="vmm_8h.html#976cf3919bf7c77c868021ec9374593b">vmmFindFreePage</a>(pid), ((x * (1024 * 4096)) + ((y + c) * 4096)),<a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>)) == 0x0)
<a name="l00278"></a>00278 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"vmmRemapPage failed: gfkp-1\n"</span>);
<a name="l00279"></a>00279 <a class="code" href="paging_8h.html#230a160ddb717c5a133e55aa42e9d324">vmmClearVirtualPage</a>((uInt32) ((x * (1024 * 4096)) + ((y + c) * 4096)));
<a name="l00280"></a>00280 }
<a name="l00281"></a>00281 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="paging_8c.html#fe74a297627a1834d20925533b77c3d8">fkpSpinLock</a>);
<a name="l00282"></a>00282 <span class="keywordflow">return</span> ((<span class="keywordtype">void</span> *)((x * (1024 * 4096)) + (y * 4096)));
<a name="l00283"></a>00283 }
<a name="l00284"></a>00284 } <span class="keywordflow">else</span> {
<a name="l00285"></a>00285 <span class="comment">/* Map A Physical Page To The Virtual Page */</span>
<a name="l00286"></a>00286
<a name="l00287"></a>00287 <span class="keywordflow">if</span> ((<a class="code" href="paging_8h.html#a05f8d8947fb5bcec87fc6661f83243e">vmm_remapPage</a>((uInt32) <a class="code" href="vmm_8h.html#976cf3919bf7c77c868021ec9374593b">vmmFindFreePage</a>(pid), ((x * (1024 * 4096)) + (y * 4096)),<a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>)) == 0x0)
<a name="l00288"></a>00288 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"vmmRemapPage failed: gfkp-2\n"</span>);
<a name="l00289"></a>00289 <span class="comment">/* Clear This Page So No Garbage Is There */</span>
<a name="l00290"></a>00290 <a class="code" href="paging_8h.html#230a160ddb717c5a133e55aa42e9d324">vmmClearVirtualPage</a>((uInt32) ((x * (1024 * 4096)) + (y * 4096)));
<a name="l00291"></a>00291 <span class="comment">/* Return The Address Of The Newly Allocate Page */</span>
<a name="l00292"></a>00292 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="paging_8c.html#fe74a297627a1834d20925533b77c3d8">fkpSpinLock</a>);
<a name="l00293"></a>00293 <span class="keywordflow">return</span> ((<span class="keywordtype">void</span> *)((x * (1024 * 4096)) + (y * 4096)));
<a name="l00294"></a>00294 }
<a name="l00295"></a>00295 }
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297 }
<a name="l00298"></a>00298 <span class="comment">/* If No Free Page Was Found Return NULL */</span>
<a name="l00299"></a>00299 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="paging_8c.html#fe74a297627a1834d20925533b77c3d8">fkpSpinLock</a>);
<a name="l00300"></a>00300 <span class="keywordflow">return</span> (0x0);
<a name="l00301"></a>00301 }
<a name="l00302"></a>00302
<a name="l00303"></a>00303
<a name="l00304"></a>00304 <span class="comment">/************************************************************************</span>
<a name="l00305"></a>00305 <span class="comment"></span>
<a name="l00306"></a>00306 <span class="comment">Function: void vmmClearVirtualPage(uInt32 pageAddr);</span>
<a name="l00307"></a>00307 <span class="comment"></span>
<a name="l00308"></a>00308 <span class="comment">Description: This Will Null Out A Page Of Memory</span>
<a name="l00309"></a>00309 <span class="comment"></span>
<a name="l00310"></a>00310 <span class="comment">Notes:</span>
<a name="l00311"></a>00311 <span class="comment"></span>
<a name="l00312"></a>00312 <span class="comment">************************************************************************/</span>
<a name="l00313"></a>00313 <span class="keywordtype">int</span>
<a name="l00314"></a><a class="code" href="paging_8c.html#230a160ddb717c5a133e55aa42e9d324">00314</a> <a class="code" href="paging_8h.html#230a160ddb717c5a133e55aa42e9d324">vmmClearVirtualPage</a>(<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> pageAddr)
<a name="l00315"></a>00315 {
<a name="l00316"></a>00316 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *src = 0x0;
<a name="l00317"></a>00317 <span class="keywordtype">int</span> counter = 0x0;
<a name="l00318"></a>00318
<a name="l00319"></a>00319 <span class="comment">/* Set Source Pointer To Virtual Page Address */</span>
<a name="l00320"></a>00320 src = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) pageAddr;
<a name="l00321"></a>00321
<a name="l00322"></a>00322 <span class="comment">/* Clear Out The Page */</span>
<a name="l00323"></a>00323 <span class="keywordflow">for</span> (counter = 0x0; counter < <a class="code" href="paging_8h.html#b80d68a13753e40b0df8e0dc0c4af870">pageEntries</a>; counter++) {
<a name="l00324"></a>00324 (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) src[counter] = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) 0x0;
<a name="l00325"></a>00325 }
<a name="l00326"></a>00326
<a name="l00327"></a>00327 <span class="comment">/* Return */</span>
<a name="l00328"></a>00328 <span class="keywordflow">return</span> (0x0);
<a name="l00329"></a>00329 }
<a name="l00330"></a>00330
<a name="l00331"></a>00331
<a name="l00332"></a><a class="code" href="paging_8c.html#5eb37b88b24489f7256232eec46de565">00332</a> <span class="keywordtype">void</span> *<a class="code" href="paging_8h.html#8f335022705939f0a6553d289b9c1e4e">vmmMapFromTask</a>(<a class="code" href="types_8h.html#e438ba74394b14d7b24b6df3b3b8c252">pidType</a> pid,<span class="keywordtype">void</span> *ptr,<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> size) {
<a name="l00333"></a>00333 <a class="code" href="structtaskStruct.html">kTask_t</a> *child = 0x0;
<a name="l00334"></a>00334 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> i = 0x0,x = 0x0,y = 0x0,count = ((size+4095)/0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>),c = 0x0;
<a name="l00335"></a>00335 <a class="code" href="types_8h.html#3b65128d2644e9b80cec9a69bfa7e094">uInt16</a> dI = 0x0,tI = 0x0;
<a name="l00336"></a>00336 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> baseAddr = 0x0,offset = 0x0;
<a name="l00337"></a>00337 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *childPageDir = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *)0x5A00000;
<a name="l00338"></a>00338 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *childPageTable = 0x0;
<a name="l00339"></a>00339 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *pageTableSrc = 0x0;
<a name="l00340"></a>00340 offset = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>)ptr & 0xFFF;
<a name="l00341"></a>00341 baseAddr = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>)ptr & 0xFFFFF000;
<a name="l00342"></a>00342 child = <a class="code" href="sched_8h.html#9cf37ade4c1f6184b33014ac2015e8ed">schedFindTask</a>(pid);
<a name="l00343"></a>00343 <span class="comment">//Calculate The Page Table Index And Page Directory Index</span>
<a name="l00344"></a>00344 dI = (baseAddr/(1024*4096));
<a name="l00345"></a>00345 tI = ((baseAddr-(dI*(1024*4096)))/4096);
<a name="l00346"></a>00346 <span class="keywordflow">if</span> (<a class="code" href="paging_8h.html#a05f8d8947fb5bcec87fc6661f83243e">vmm_remapPage</a>(child-><a class="code" href="structtaskStruct.html#4c8accd7c0d5bb5ce426dc982bfc8519">tss</a>.<a class="code" href="structtssStruct.html#8d312ed3dd0ea7a0f801c08a8cc4afd0">cr3</a>,0x5A00000,<a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>) == 0x0)
<a name="l00347"></a>00347 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"vmmFailed"</span>);
<a name="l00348"></a>00348
<a name="l00349"></a>00349 <span class="keywordflow">for</span> (i=0;i<0x1000;i++) {
<a name="l00350"></a>00350 <span class="keywordflow">if</span> (<a class="code" href="paging_8h.html#a05f8d8947fb5bcec87fc6661f83243e">vmm_remapPage</a>(childPageDir[i],0x5A01000 + (i * 0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>),<a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>) == 0x0)
<a name="l00351"></a>00351 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"Returned NULL"</span>);
<a name="l00352"></a>00352 }
<a name="l00353"></a>00353 <span class="keywordflow">for</span> (x=(<a class="code" href="sched_8h.html#54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#0933c70230d4ac8bc9953640c979f8d7">oInfo</a>.<a class="code" href="structosInfo.html#2833c1fa4a221941b5d1141dfa5beefd">vmStart</a>/(1024*4096));x<1024;x++) {
<a name="l00354"></a>00354 pageTableSrc = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *)(<a class="code" href="paging_8h.html#a432d41840ad8a583a7e6af86feece4f">tablesBaseAddress</a> + (4096*x));
<a name="l00355"></a>00355 <span class="keywordflow">for</span> (y=0;y<1024;y++) {
<a name="l00356"></a>00356 <span class="comment">//Loop Through The Page Table Find An UnAllocated Page</span>
<a name="l00357"></a>00357 <span class="keywordflow">if</span> ((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>)pageTableSrc[y] == (uInt32)0x0) {
<a name="l00358"></a>00358 <span class="keywordflow">if</span> (count > 1) {
<a name="l00359"></a>00359 <span class="keywordflow">for</span> (c=0;((c<count) && (y+c < 1024));c++) {
<a name="l00360"></a>00360 <span class="keywordflow">if</span> ((uInt32)pageTableSrc[y+c] != (uInt32)0x0) {
<a name="l00361"></a>00361 c = -1;
<a name="l00362"></a>00362 <span class="keywordflow">break</span>;
<a name="l00363"></a>00363 }
<a name="l00364"></a>00364 }
<a name="l00365"></a>00365 <span class="keywordflow">if</span> (c != -1) {
<a name="l00366"></a>00366 <span class="keywordflow">for</span> (c=0;c<count;c++) {
<a name="l00367"></a>00367 <span class="keywordflow">if</span> ((tI + c) >= 0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>) {
<a name="l00368"></a>00368 dI++;
<a name="l00369"></a>00369 tI = 0-c;
<a name="l00370"></a>00370 }
<a name="l00371"></a>00371 childPageTable = (uInt32 *)(0x5A01000 + (0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a> * dI));
<a name="l00372"></a>00372 <span class="keywordflow">if</span> (<a class="code" href="paging_8h.html#a05f8d8947fb5bcec87fc6661f83243e">vmm_remapPage</a>(childPageTable[tI+c],((x*(1024*4096))+((y+c)*4096)),<a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>) == 0x0)
<a name="l00373"></a>00373 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"remap == NULL"</span>);
<a name="l00374"></a>00374 }
<a name="l00375"></a>00375 <a class="code" href="paging_8h.html#fd94da50e455602f86ad7dae2fc9d1db">vmmUnmapPage</a>(0x5A00000,1);
<a name="l00376"></a>00376 <span class="keywordflow">for</span> (i=0;i<0x1000;i++) {
<a name="l00377"></a>00377 <a class="code" href="paging_8h.html#fd94da50e455602f86ad7dae2fc9d1db">vmmUnmapPage</a>((0x5A01000 + (i*0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>)),1);
<a name="l00378"></a>00378 }
<a name="l00379"></a>00379 <span class="keywordflow">return</span>((<span class="keywordtype">void</span> *)((x*(1024*4096))+(y*4096)+offset));
<a name="l00380"></a>00380 }
<a name="l00381"></a>00381 }
<a name="l00382"></a>00382 <span class="keywordflow">else</span> {
<a name="l00383"></a>00383 <span class="comment">//Map A Physical Page To The Virtual Page</span>
<a name="l00384"></a>00384 childPageTable = (uInt32 *)(0x5A01000 + (0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a> * dI));
<a name="l00385"></a>00385 <span class="keywordflow">if</span> (<a class="code" href="paging_8h.html#a05f8d8947fb5bcec87fc6661f83243e">vmm_remapPage</a>(childPageTable[tI],((x*(1024*4096))+(y*4096)),<a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>) == 0x0)
<a name="l00386"></a>00386 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"remap Failed"</span>);
<a name="l00387"></a>00387
<a name="l00388"></a>00388 <span class="comment">//Return The Address Of The Mapped In Memory</span>
<a name="l00389"></a>00389 <a class="code" href="paging_8h.html#fd94da50e455602f86ad7dae2fc9d1db">vmmUnmapPage</a>(0x5A00000,1);
<a name="l00390"></a>00390 <span class="keywordflow">for</span> (i=0;i<0x1000;i++) {
<a name="l00391"></a>00391 <a class="code" href="paging_8h.html#fd94da50e455602f86ad7dae2fc9d1db">vmmUnmapPage</a>((0x5A01000 + (i*0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>)),1);
<a name="l00392"></a>00392 }
<a name="l00393"></a>00393 <span class="keywordflow">return</span>((<span class="keywordtype">void</span> *)((x*(1024*4096))+(y*4096)+offset));
<a name="l00394"></a>00394 }
<a name="l00395"></a>00395 }
<a name="l00396"></a>00396 }
<a name="l00397"></a>00397 }
<a name="l00398"></a>00398 <span class="keywordflow">return</span>(0x0);
<a name="l00399"></a>00399 }
<a name="l00400"></a>00400
<a name="l00401"></a><a class="code" href="paging_8c.html#541f0b43826a40b9e978f5479080bb0e">00401</a> <span class="keywordtype">void</span> *<a class="code" href="paging_8h.html#541f0b43826a40b9e978f5479080bb0e">vmm_getFreeMallocPage</a>(<a class="code" href="types_8h.html#3b65128d2644e9b80cec9a69bfa7e094">uInt16</a> count) {
<a name="l00402"></a>00402 <a class="code" href="types_8h.html#3b65128d2644e9b80cec9a69bfa7e094">uInt16</a> x = 0x0, y = 0x0;
<a name="l00403"></a>00403 <span class="keywordtype">int</span> c = 0x0;
<a name="l00404"></a>00404 <a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *pageTableSrc = 0x0;
<a name="l00405"></a>00405
<a name="l00406"></a>00406 <a class="code" href="spinlock_8h.html#2cd9a4502680fb8e7f0fe6b029e558b1">spinLock</a>(&<a class="code" href="paging_8c.html#fe74a297627a1834d20925533b77c3d8">fkpSpinLock</a>);
<a name="l00407"></a>00407 <span class="comment">/* Lets Search For A Free Page */</span>
<a name="l00408"></a>00408 <span class="keywordflow">for</span> (x = 960; x < 1024; x++) {
<a name="l00409"></a>00409 <span class="comment">/* Set Page Table Address */</span>
<a name="l00410"></a>00410 pageTableSrc = (<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> * x));
<a name="l00411"></a>00411 <span class="keywordflow">for</span> (y = 0; y < 1024; y++) {
<a name="l00412"></a>00412 <span class="comment">/* Loop Through The Page Table Find An UnAllocated Page */</span>
<a name="l00413"></a>00413 <span class="keywordflow">if</span> ((<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a>) pageTableSrc[y] == (uInt32) 0x0) {
<a name="l00414"></a>00414 <span class="keywordflow">if</span> (count > 1) {
<a name="l00415"></a>00415 <span class="keywordflow">for</span> (c = 0; c < count; c++) {
<a name="l00416"></a>00416 <span class="keywordflow">if</span> (y + c < 1024) {
<a name="l00417"></a>00417 <span class="keywordflow">if</span> ((uInt32) pageTableSrc[y + c] != (uInt32) 0x0) {
<a name="l00418"></a>00418 c = -1;
<a name="l00419"></a>00419 <span class="keywordflow">break</span>;
<a name="l00420"></a>00420 }
<a name="l00421"></a>00421 }
<a name="l00422"></a>00422 }
<a name="l00423"></a>00423 <span class="keywordflow">if</span> (c != -1) {
<a name="l00424"></a>00424 <span class="keywordflow">for</span> (c = 0; c < count; c++) {
<a name="l00425"></a>00425 <span class="keywordflow">if</span> (<a class="code" href="paging_8h.html#a05f8d8947fb5bcec87fc6661f83243e">vmm_remapPage</a>((uInt32) <a class="code" href="vmm_8h.html#976cf3919bf7c77c868021ec9374593b">vmmFindFreePage</a>(<a class="code" href="kmalloc_8h.html#81d09bc848b49133401b3efeeb65f1af">sysID</a>), ((x * 0x400000) + ((y + c) * 0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>)),<a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>) == 0x0)
<a name="l00426"></a>00426 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"remap Failed"</span>);
<a name="l00427"></a>00427
<a name="l00428"></a>00428 <a class="code" href="paging_8h.html#230a160ddb717c5a133e55aa42e9d324">vmmClearVirtualPage</a>((uInt32) ((x * 0x400000) + ((y + c) * 0x1000)));
<a name="l00429"></a>00429 }
<a name="l00430"></a>00430 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="paging_8c.html#fe74a297627a1834d20925533b77c3d8">fkpSpinLock</a>);
<a name="l00431"></a>00431 <span class="keywordflow">return</span> ((<span class="keywordtype">void</span> *)((x * 0x400000) + (y * 0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>)));
<a name="l00432"></a>00432 }
<a name="l00433"></a>00433 }
<a name="l00434"></a>00434 <span class="keywordflow">else</span> {
<a name="l00435"></a>00435 <span class="comment">/* Map A Physical Page To The Virtual Page */</span>
<a name="l00436"></a>00436 <span class="keywordflow">if</span> (<a class="code" href="paging_8h.html#a05f8d8947fb5bcec87fc6661f83243e">vmm_remapPage</a>((uInt32) <a class="code" href="vmm_8h.html#976cf3919bf7c77c868021ec9374593b">vmmFindFreePage</a>(<a class="code" href="kmalloc_8h.html#81d09bc848b49133401b3efeeb65f1af">sysID</a>), ((x * 0x400000) + (y * 0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>)),<a class="code" href="paging_8h.html#8b838cda4f0bc79ab8d07eb19dd35420">KERNEL_PAGE_DEFAULT</a>) == 0x0)
<a name="l00437"></a>00437 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"Failed"</span>);
<a name="l00438"></a>00438
<a name="l00439"></a>00439 <span class="comment">/* Clear This Page So No Garbage Is There */</span>
<a name="l00440"></a>00440 <a class="code" href="paging_8h.html#230a160ddb717c5a133e55aa42e9d324">vmmClearVirtualPage</a>((uInt32) ((x * 0x400000) + (y * 0x1000)));
<a name="l00441"></a>00441 <span class="comment">/* Return The Address Of The Newly Allocate Page */</span>
<a name="l00442"></a>00442 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="paging_8c.html#fe74a297627a1834d20925533b77c3d8">fkpSpinLock</a>);
<a name="l00443"></a>00443 <span class="keywordflow">return</span> ((<span class="keywordtype">void</span> *)((x * 0x400000) + (y * 0x1000)));
<a name="l00444"></a>00444 }
<a name="l00445"></a>00445 }
<a name="l00446"></a>00446 }
<a name="l00447"></a>00447 }
<a name="l00448"></a>00448 <span class="comment">/* If No Free Page Was Found Return NULL */</span>
<a name="l00449"></a>00449 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="paging_8c.html#fe74a297627a1834d20925533b77c3d8">fkpSpinLock</a>);
<a name="l00450"></a>00450 <span class="keywordflow">return</span> (0x0);
<a name="l00451"></a>00451 }
<a name="l00452"></a>00452
<a name="l00453"></a><a class="code" href="paging_8c.html#b3070a217a42db69cd94b6217f0b361a">00453</a> <span class="keywordtype">int</span> <a class="code" href="syscalls__new_8h.html#9721caa05ef16cbf780658769bfd537a">mmap</a>(<span class="keyword">struct</span> <a class="code" href="structthread.html">thread</a> *td,<span class="keyword">struct</span> <a class="code" href="structmmap__args.html">mmap_args</a> *uap) {
<a name="l00454"></a>00454 <a class="code" href="types_8h.html#d6f327965d9e330cd225ca2153ac0453">vm_offset_t</a> addr = 0x0;
<a name="l00455"></a>00455
<a name="l00456"></a>00456 addr = (<a class="code" href="types_8h.html#d6f327965d9e330cd225ca2153ac0453">vm_offset_t</a>) uap-><a class="code" href="structmmap__args.html#13ec5b173a8fe6428cf3bf0a5f2d4fc2">addr</a>;
<a name="l00457"></a>00457
<a name="l00458"></a>00458 #ifdef DEBUG
<a name="l00459"></a>00459 if (uap-><a class="code" href="structmmap__args.html#13ec5b173a8fe6428cf3bf0a5f2d4fc2">addr</a> != 0x0) {
<a name="l00460"></a>00460 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"Address hints are not supported yet.\n"</span>);
<a name="l00461"></a>00461 }
<a name="l00462"></a>00462 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"uap->flags: [0x%X]\n"</span>,uap-><a class="code" href="structmmap__args.html#04b82aa69d28fc03e57632b7d524758d">flags</a>);
<a name="l00463"></a>00463 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"uap->addr: [0x%X]\n"</span>,uap-><a class="code" href="structmmap__args.html#13ec5b173a8fe6428cf3bf0a5f2d4fc2">addr</a>);
<a name="l00464"></a>00464 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"uap->len: [0x%X]\n"</span>,uap-><a class="code" href="structmmap__args.html#0b1dab766559d59a733fede0d3767c14">len</a>);
<a name="l00465"></a>00465 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"uap->prot: [0x%X]\n"</span>,uap-><a class="code" href="structmmap__args.html#d6c74b2bf9e921cb4da0cbd508b2e21d">prot</a>);
<a name="l00466"></a>00466 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"uap->fd: [%i]\n"</span>,uap-><a class="code" href="structmmap__args.html#abfe32d5934305c27dd528bba990ae12">fd</a>);
<a name="l00467"></a>00467 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"uap->pad: [0x%X]\n"</span>,uap-><a class="code" href="structmmap__args.html#5ad4ee0f25f92b5a4da5a86ba40ee1e2">pad</a>);
<a name="l00468"></a>00468 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"uap->pos: [0x%X]\n"</span>,uap-><a class="code" href="structmmap__args.html#7cc0a114bae15892a406fa7196229e37">pos</a>);
<a name="l00469"></a>00469 <span class="preprocessor"> #endif</span>
<a name="l00470"></a>00470 <span class="preprocessor"></span>
<a name="l00471"></a>00471 <span class="keywordflow">if</span> (uap-><a class="code" href="structmmap__args.html#abfe32d5934305c27dd528bba990ae12">fd</a> == -1)
<a name="l00472"></a>00472 td-><a class="code" href="structthread.html#f3ec0788a84e5cb640a1646d1347998a">td_retval</a>[0] = <a class="code" href="paging_8h.html#4b324672c4b25064eb8db1e3419337b1">vmmGetFreeVirtualPage</a>(<a class="code" href="sched_8h.html#54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#30966587a60db6b40c8be6c387e11d81">id</a>,uap-><a class="code" href="structmmap__args.html#0b1dab766559d59a733fede0d3767c14">len</a>/0<a class="code" href="ap-boot_8S.html#f78b91f02427adef14bb8b28aa93baa5">x1000</a>,<a class="code" href="paging_8h.html#59a518704bf2f0b56603476bcb1eebbf">VM_TASK</a>);
<a name="l00473"></a>00473 <span class="keywordflow">else</span>
<a name="l00474"></a>00474 td-><a class="code" href="structthread.html#f3ec0788a84e5cb640a1646d1347998a">td_retval</a>[0] = 0x0;
<a name="l00475"></a>00475 <span class="keywordflow">return</span>(0x0);
<a name="l00476"></a>00476 }
<a name="l00477"></a>00477
<a name="l00478"></a><a class="code" href="paging_8c.html#6cdf3466734f2da5e258c9844d536295">00478</a> <span class="keywordtype">int</span> <a class="code" href="syscalls__new_8h.html#7f9e3f42e3fe0ba5e2dd3a4140ef14de">obreak</a>(<span class="keyword">struct</span> <a class="code" href="structthread.html">thread</a> *td,<span class="keyword">struct</span> <a class="code" href="structobreak__args.html">obreak_args</a> *uap) {
<a name="l00479"></a>00479 <a class="code" href="types_8h.html#ba29fd78d95cce0ecb249c24b58d07da">u_int32_t</a> i = 0x0;
<a name="l00480"></a>00480 <a class="code" href="types_8h.html#d6f327965d9e330cd225ca2153ac0453">vm_offset_t</a> old = 0x0;
<a name="l00481"></a>00481 <a class="code" href="types_8h.html#d6f327965d9e330cd225ca2153ac0453">vm_offset_t</a> base = 0x0;
<a name="l00482"></a>00482 <a class="code" href="types_8h.html#d6f327965d9e330cd225ca2153ac0453">vm_offset_t</a> <span class="keyword">new</span> = 0x0;
<a name="l00483"></a>00483
<a name="l00484"></a>00484 <span class="preprocessor"> #ifdef DEBUG</span>
<a name="l00485"></a>00485 <span class="preprocessor"></span> <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"vm_offset_t: [%i]\n"</span>,<span class="keyword">sizeof</span>(<a class="code" href="types_8h.html#d6f327965d9e330cd225ca2153ac0453">vm_offset_t</a>));
<a name="l00486"></a>00486 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"nsize: [0x%X]\n"</span>,uap-><a class="code" href="structobreak__args.html#b30a3d3c9186553a40d1b6e7c5714fb4">nsize</a>);
<a name="l00487"></a>00487 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"vm_daddr: [0x%X]\n"</span>,td-><a class="code" href="structthread.html#c770300b493b2ea844e634b7c98c4f6a">vm_daddr</a>);
<a name="l00488"></a>00488 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"vm_dsize: [0x%X]\n"</span>,td-><a class="code" href="structthread.html#4ce0e0e5856efc85e111d2cb8748a0ee">vm_dsize</a>);
<a name="l00489"></a>00489 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"total: [0x%X]\n"</span>,td-><a class="code" href="structthread.html#c770300b493b2ea844e634b7c98c4f6a">vm_daddr</a> + td-><a class="code" href="structthread.html#4ce0e0e5856efc85e111d2cb8748a0ee">vm_dsize</a>);
<a name="l00490"></a>00490 <span class="preprocessor"> #endif</span>
<a name="l00491"></a>00491 <span class="preprocessor"></span>
<a name="l00492"></a>00492 <span class="keyword">new</span> = <a class="code" href="paging_8h.html#2702263fcf2b3b026cb26c6d895cb0ee">round_page</a>((vm_offset_t)uap-><a class="code" href="structobreak__args.html#b30a3d3c9186553a40d1b6e7c5714fb4">nsize</a>);
<a name="l00493"></a>00493
<a name="l00494"></a>00494 base = <a class="code" href="paging_8h.html#2702263fcf2b3b026cb26c6d895cb0ee">round_page</a>((vm_offset_t)td-><a class="code" href="structthread.html#c770300b493b2ea844e634b7c98c4f6a">vm_daddr</a>);
<a name="l00495"></a>00495
<a name="l00496"></a>00496 old = base + <a class="code" href="paging_8h.html#071caea8a82a06e754daca63317d3c07">ctob</a>(td-><a class="code" href="structthread.html#4ce0e0e5856efc85e111d2cb8748a0ee">vm_dsize</a>);
<a name="l00497"></a>00497
<a name="l00498"></a>00498 <span class="keywordflow">if</span> (<span class="keyword">new</span> < base)
<a name="l00499"></a>00499 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"EINVAL"</span>);
<a name="l00500"></a>00500
<a name="l00501"></a>00501 <span class="keywordflow">if</span> (<span class="keyword">new</span> > old) {
<a name="l00502"></a>00502 <span class="keywordflow">for</span> (i = old;i < <span class="keyword">new</span>;i+= 0x1000) {
<a name="l00503"></a>00503 <span class="keywordflow">if</span> (<a class="code" href="paging_8h.html#a05f8d8947fb5bcec87fc6661f83243e">vmm_remapPage</a>(<a class="code" href="vmm_8h.html#976cf3919bf7c77c868021ec9374593b">vmmFindFreePage</a>(<a class="code" href="sched_8h.html#54397bfe18d5da4d50ff03b15f540858">_current</a>-><a class="code" href="structtaskStruct.html#30966587a60db6b40c8be6c387e11d81">id</a>),i,<a class="code" href="paging_8h.html#f0fff7a38cd2c7a32d580787423b94ea">PAGE_DEFAULT</a>) == 0x0)
<a name="l00504"></a>00504 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"remap Failed"</span>);
<a name="l00505"></a>00505 }
<a name="l00506"></a>00506 td-><a class="code" href="structthread.html#4ce0e0e5856efc85e111d2cb8748a0ee">vm_dsize</a> += <a class="code" href="paging_8h.html#0851ee42f36c8a00e9eafe739c8ffaaa">btoc</a>(<span class="keyword">new</span> - old);
<a name="l00507"></a>00507 }
<a name="l00508"></a>00508 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">new</span> < old) {
<a name="l00509"></a>00509 <a class="code" href="kpanic_8h.html#a5193288597f00c4f8e3b2939aa6c0ce">K_PANIC</a>(<span class="stringliteral">"new < old"</span>);
<a name="l00510"></a>00510 td-><a class="code" href="structthread.html#4ce0e0e5856efc85e111d2cb8748a0ee">vm_dsize</a> -= <a class="code" href="paging_8h.html#0851ee42f36c8a00e9eafe739c8ffaaa">btoc</a>(old - <span class="keyword">new</span>);
<a name="l00511"></a>00511 }
<a name="l00512"></a>00512
<a name="l00513"></a>00513 <span class="keywordflow">return</span>(0x0);
<a name="l00514"></a>00514 }
<a name="l00515"></a>00515
<a name="l00516"></a><a class="code" href="paging_8c.html#2ef18727032511b619759847d8c21720">00516</a> <span class="keywordtype">int</span> <a class="code" href="syscalls__new_8h.html#94676b8bce29788e36abad710783e545">munmap</a>(<span class="keyword">struct</span> <a class="code" href="structthread.html">thread</a> *td,<span class="keyword">struct</span> <a class="code" href="structmunmap__args.html">munmap_args</a> *uap) {
<a name="l00517"></a>00517 <span class="comment">/* HACK */</span>
<a name="l00518"></a>00518 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"munmap"</span>);
<a name="l00519"></a>00519 <span class="keywordflow">return</span>(0x0);
<a name="l00520"></a>00520 }
<a name="l00521"></a>00521
<a name="l00522"></a><a class="code" href="paging_8c.html#0444c8635648fabdbd6e702137aa1723">00522</a> <span class="keywordtype">int</span> <a class="code" href="paging_8c.html#0444c8635648fabdbd6e702137aa1723">vmm_cleanVirtualSpace</a>(<a class="code" href="types_8h.html#ba29fd78d95cce0ecb249c24b58d07da">u_int32_t</a> addr) {
<a name="l00523"></a>00523 <span class="keywordtype">int</span> x = 0x0;
<a name="l00524"></a>00524 <span class="keywordtype">int</span> y = 0x0;
<a name="l00525"></a>00525 <a class="code" href="types_8h.html#ba29fd78d95cce0ecb249c24b58d07da">u_int32_t</a> *pageTableSrc = 0x0;
<a name="l00526"></a>00526 <a class="code" href="types_8h.html#ba29fd78d95cce0ecb249c24b58d07da">u_int32_t</a> *pageDir = 0x0;
<a name="l00527"></a>00527
<a name="l00528"></a>00528 pageDir = (<a class="code" href="types_8h.html#5847ea0262a5aa61eee48cbe95544a78">uInt32</a> *) <a class="code" href="paging_8h.html#aab3609eb02bd28ded8d1ea0512da979">parentPageDirAddr</a>;
<a name="l00529"></a>00529
<a name="l00530"></a>00530 <span class="preprocessor"> #ifdef DEBUG</span>
<a name="l00531"></a>00531 <span class="preprocessor"></span> <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"CVS: [0x%X]\n"</span>,addr);
<a name="l00532"></a>00532 <span class="preprocessor"> #endif</span>
<a name="l00533"></a>00533 <span class="preprocessor"></span>
<a name="l00534"></a>00534 <span class="keywordflow">for</span> (x = (addr / (1024 * 4096)); x < 770; x++) {
<a name="l00535"></a>00535 <span class="keywordflow">if</span> ((pageDir[x] & <a class="code" href="paging_8h.html#122dfc414a40e260fd35dbe9743db26f">PAGE_PRESENT</a>) == PAGE_PRESENT) {
<a name="l00536"></a>00536 pageTableSrc = (<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> * x));
<a name="l00537"></a>00537 <span class="keywordflow">for</span> (y = 0;y < 1024;y++) {
<a name="l00538"></a>00538 <span class="keywordflow">if</span> (pageTableSrc[y] != 0x0) {
<a name="l00539"></a>00539 <span class="keywordflow">if</span> ((pageTableSrc[y] & <a class="code" href="paging_8h.html#57d743cb60fe478f6720c42315e7e813">PAGE_COW</a>) == PAGE_COW) {
<a name="l00540"></a>00540 <span class="comment">//kprintf("COWi*");</span>
<a name="l00541"></a>00541 pageTableSrc[y] = 0x0;
<a name="l00542"></a>00542 }
<a name="l00543"></a>00543 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((pageTableSrc[y] & <a class="code" href="paging_8h.html#1532db17068ba8d409b8ffe066414af2">PAGE_STACK</a>) == PAGE_STACK) {
<a name="l00544"></a>00544 <span class="comment">//pageTableSrc[y] = 0x0;</span>
<a name="l00545"></a>00545 <span class="comment">//kprintf("STACK: (%i:%i)",x,y);</span>
<a name="l00546"></a>00546 }
<a name="l00547"></a>00547 <span class="keywordflow">else</span> {
<a name="l00548"></a>00548 <span class="comment">//kprintf("+");</span>
<a name="l00549"></a>00549 }
<a name="l00550"></a>00550 }
<a name="l00551"></a>00551 }
<a name="l00552"></a>00552 }
<a name="l00553"></a>00553 }
<a name="l00554"></a>00554 <span class="keyword">asm</span>(
<a name="l00555"></a>00555 <span class="stringliteral">"movl %cr3,%eax\n"</span>
<a name="l00556"></a>00556 <span class="stringliteral">"movl %eax,%cr3\n"</span>
<a name="l00557"></a>00557 );
<a name="l00558"></a>00558 <span class="keywordflow">return</span>(0x0);
<a name="l00559"></a>00559 }
<a name="l00560"></a>00560
<a name="l00561"></a>00561 <span class="comment">/***</span>
<a name="l00562"></a>00562 <span class="comment"> END</span>
<a name="l00563"></a>00563 <span class="comment"> ***/</span>
<a name="l00564"></a>00564
</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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