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<a href="#nested-classes">Data Structures</a> &#124;
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<div class="title">gdt.c File Reference</div> </div>
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<div class="textblock"><code>#include &lt;stdint.h&gt;</code><br />
<code>#include &lt;string.h&gt;</code><br />
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Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structgdt__entry.html">gdt_entry</a></td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structgdt__description.html">gdt_description</a></td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structtss__entry.html">tss_entry</a></td></tr>
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#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="gdt_8c.html#a389dd5398d15be0a98756235e791e6cd">NUM_ENTRIES</a>&#160;&#160;&#160;6</td></tr>
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Functions</h2></td></tr>
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uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="gdt_8c.html#acd7ef9e5bed2fba0c703d4b08514f0a7">int_stack_top</a></td></tr>
<tr class="memdesc:acd7ef9e5bed2fba0c703d4b08514f0a7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Initial kernel stack before the kernel's first yield. <br /></td></tr>
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static <a class="el" href="structgdt__entry.html">gdt_entry</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="gdt_8c.html#a0f4d3a4a64bfc46940c10cb3bbb7b9cb">gdt</a> [<a class="el" href="gdt_8c.html#a389dd5398d15be0a98756235e791e6cd">NUM_ENTRIES</a>]</td></tr>
<tr class="memdesc:a0f4d3a4a64bfc46940c10cb3bbb7b9cb"><td class="mdescLeft">&#160;</td><td class="mdescRight">The GDT. <br /></td></tr>
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static <a class="el" href="structgdt__description.html">gdt_description</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="gdt_8c.html#a823bcbc577ee7b289fea00385b3cfcd6">gdt_desc</a></td></tr>
<tr class="memdesc:a823bcbc577ee7b289fea00385b3cfcd6"><td class="mdescLeft">&#160;</td><td class="mdescRight">The value to load into the GDTR. <br /></td></tr>
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<a class="el" href="structtss__entry.html">tss_entry</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="gdt_8c.html#a455af0f71aa0353da14de2d25189d05f">tss</a></td></tr>
<tr class="memdesc:a455af0f71aa0353da14de2d25189d05f"><td class="mdescLeft">&#160;</td><td class="mdescRight">The TSS. <br /></td></tr>
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<h2 class="groupheader">Function Documentation</h2>
<a id="ac3220c4aae127e5028cb2388ad787108"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac3220c4aae127e5028cb2388ad787108">&#9670;&nbsp;</a></span>allow_all_ports()</h2>
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<td class="memname">void allow_all_ports </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
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<p>Allows all ports in the IOPB. </p>
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</div>
<a id="a5f661be1f1f60c6cef730a8c2024dc94"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a5f661be1f1f60c6cef730a8c2024dc94">&#9670;&nbsp;</a></span>block_all_ports()</h2>
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<td class="memname">void block_all_ports </td>
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<td class="paramname"></td><td>)</td>
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<p>Blocks all ports in the IOPB. </p>
</div>
</div>
<a id="aaa7a7d6a41843f8a0c64fd66967feef4"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aaa7a7d6a41843f8a0c64fd66967feef4">&#9670;&nbsp;</a></span>gdt_init()</h2>
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<td class="memname">void gdt_init </td>
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<p>Initializes the GDT &amp; TSS. </p>
</div>
</div>
<a id="a8ecb0e32b56815d5bd60db521567f471"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a8ecb0e32b56815d5bd60db521567f471">&#9670;&nbsp;</a></span>set_entry()</h2>
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<td class="memname">static void set_entry </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>i</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint32_t&#160;</td>
<td class="paramname"><em>base</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint32_t&#160;</td>
<td class="paramname"><em>limit</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint8_t&#160;</td>
<td class="paramname"><em>access</em>&#160;</td>
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<td>)</td>
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<p>Set a GDT entry. </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">i</td><td>The GDT entry to set. </td></tr>
<tr><td class="paramname">base</td><td>The base of the GDT entry. </td></tr>
<tr><td class="paramname">limit</td><td>The limit of the GDT entry. </td></tr>
<tr><td class="paramname">access</td><td>The access byte of the GDT entry. </td></tr>
</table>
</dd>
</dl>
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</div>
<a id="aa27ea5f3de17cbaeabd741a1218d35ff"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa27ea5f3de17cbaeabd741a1218d35ff">&#9670;&nbsp;</a></span>write_tss()</h2>
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<td class="memname">static void write_tss </td>
<td>(</td>
<td class="paramtype">int32_t&#160;</td>
<td class="paramname"><em>num</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint16_t&#160;</td>
<td class="paramname"><em>ss0</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint32_t&#160;</td>
<td class="paramname"><em>esp0</em>&#160;</td>
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<td></td>
<td>)</td>
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>Set a GDT entry. </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">num</td><td>The GDT entry to set. </td></tr>
<tr><td class="paramname">ss0</td><td>The kernel stack selector. </td></tr>
<tr><td class="paramname">esp0</td><td>The kernel stack pointer. </td></tr>
</table>
</dd>
</dl>
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