528 lines
23 KiB
HTML
528 lines
23 KiB
HTML
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<div class="header">
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<a href="#define-members">Macros</a> |
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<a href="#func-members">Functions</a> </div>
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<div class="headertitle">
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<div class="title">paging.h File Reference</div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="textblock"><code>#include <stddef.h></code><br />
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</div>
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<p><a href="paging_8h_source.html">Go to the source code of this file.</a></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
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Macros</h2></td></tr>
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<tr class="memitem:a7e912ae10cea398cf910621105ba481c"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#a7e912ae10cea398cf910621105ba481c">RUN_IN_ADDRESS_SPACE</a>(addr_space, codeblock)</td></tr>
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<tr class="separator:a7e912ae10cea398cf910621105ba481c"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:a2370886c08cc1b84fa1d81fc8022db9b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#a2370886c08cc1b84fa1d81fc8022db9b">map_pages</a> (void *virt_addr_ptr, void *phys_addr_ptr, int num_pages, char usr, char wr)</td></tr>
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<tr class="separator:a2370886c08cc1b84fa1d81fc8022db9b"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a8b40f4b94c1ee447f4f59b8e1c7d7227"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#a8b40f4b94c1ee447f4f59b8e1c7d7227">unmap_pages</a> (void *start_virt, int num_pages, int free_phys)</td></tr>
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<tr class="separator:a8b40f4b94c1ee447f4f59b8e1c7d7227"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a64db1d6c4d8861128d9e6e7f671213d8"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#a64db1d6c4d8861128d9e6e7f671213d8">alloc_pages</a> (int num_pages)</td></tr>
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<tr class="separator:a64db1d6c4d8861128d9e6e7f671213d8"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a0f831aadf41672c296645a7b0df4a5c6"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#a0f831aadf41672c296645a7b0df4a5c6">alloc_pages_virt</a> (int num_pages, void *addr)</td></tr>
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<tr class="separator:a0f831aadf41672c296645a7b0df4a5c6"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a6acaea424d9bee06bf95ceb299d75a11"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#a6acaea424d9bee06bf95ceb299d75a11">dealloc_pages</a> (int num_pages, void *addr)</td></tr>
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<tr class="separator:a6acaea424d9bee06bf95ceb299d75a11"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a569adfd13ea3c63741f64108821b1712"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#a569adfd13ea3c63741f64108821b1712">paging_init</a> ()</td></tr>
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<tr class="separator:a569adfd13ea3c63741f64108821b1712"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a8b1cb213f5783b7137f40279db762ffc"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#a8b1cb213f5783b7137f40279db762ffc">paging_new_address_space</a> ()</td></tr>
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<tr class="separator:a8b1cb213f5783b7137f40279db762ffc"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aee63ef1cb665a5aa68a15ab2461d20cd"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#aee63ef1cb665a5aa68a15ab2461d20cd">load_address_space</a> (void *address_space)</td></tr>
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<tr class="separator:aee63ef1cb665a5aa68a15ab2461d20cd"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:af473eee5243c70174a1245d70a5c16fa"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#af473eee5243c70174a1245d70a5c16fa">virt_to_phys</a> (void *virt_addr)</td></tr>
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<tr class="separator:af473eee5243c70174a1245d70a5c16fa"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1675ea0f8e4994b4fbbbe3984ca522b1"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#a1675ea0f8e4994b4fbbbe3984ca522b1">find_free_pages</a> (int num_pages)</td></tr>
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<tr class="separator:a1675ea0f8e4994b4fbbbe3984ca522b1"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a7554d075a99f52e3303d1ffd90d8c166"><td class="memItemLeft" align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#a7554d075a99f52e3303d1ffd90d8c166">get_address_space</a> ()</td></tr>
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<tr class="separator:a7554d075a99f52e3303d1ffd90d8c166"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a348bcf40a7b8895924343598c3bf5f23"><td class="memItemLeft" align="right" valign="top">char </td><td class="memItemRight" valign="bottom"><a class="el" href="paging_8h.html#a348bcf40a7b8895924343598c3bf5f23">is_page_present</a> (size_t page)</td></tr>
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<tr class="separator:a348bcf40a7b8895924343598c3bf5f23"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<h2 class="groupheader">Macro Definition Documentation</h2>
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<a id="a7e912ae10cea398cf910621105ba481c"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a7e912ae10cea398cf910621105ba481c">◆ </a></span>RUN_IN_ADDRESS_SPACE</h2>
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<div class="memitem">
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<td class="memname">#define RUN_IN_ADDRESS_SPACE</td>
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<td>(</td>
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<td class="paramtype"> </td>
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<td class="paramname">addr_space, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"> </td>
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<td class="paramname">codeblock </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</table>
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</div><div class="memdoc">
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<b>Value:</b><div class="fragment"><div class="line"> <span class="keywordflow">do</span> { \</div>
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<div class="line"> void* old_address_space=<a class="code" href="paging_8h.html#a7554d075a99f52e3303d1ffd90d8c166">get_address_space</a>(); \</div>
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<div class="line"> load_address_space(addr_space); \</div>
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<div class="line"> codeblock; \</div>
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<div class="line"> load_address_space(old_address_space); \</div>
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<div class="line">} <span class="keywordflow">while</span>(0);</div>
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<div class="ttc" id="apaging_8h_html_a7554d075a99f52e3303d1ffd90d8c166"><div class="ttname"><a href="paging_8h.html#a7554d075a99f52e3303d1ffd90d8c166">get_address_space</a></div><div class="ttdeci">void * get_address_space()</div><div class="ttdef"><b>Definition:</b> paging.c:231</div></div>
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</div><!-- fragment --><p>Run a block of code in a different address space </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">addr_space</td><td>the address space to use </td></tr>
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<tr><td class="paramname">codeblock</td><td>the block of code to run </td></tr>
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</table>
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</dd>
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</dl>
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</div>
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</div>
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<h2 class="groupheader">Function Documentation</h2>
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<a id="a64db1d6c4d8861128d9e6e7f671213d8"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a64db1d6c4d8861128d9e6e7f671213d8">◆ </a></span>alloc_pages()</h2>
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<div class="memproto">
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<td class="memname">void* alloc_pages </td>
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<td>(</td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>num_pages</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Allocate virtual pages & map them to newly allocated physical memory. </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">num_pages</td><td>The number of pages to allocate. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>a pointer to the allocated pages. </dd></dl>
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</div>
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</div>
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<a id="a0f831aadf41672c296645a7b0df4a5c6"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a0f831aadf41672c296645a7b0df4a5c6">◆ </a></span>alloc_pages_virt()</h2>
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<td class="memname">void alloc_pages_virt </td>
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<td>(</td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>num_pages</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">void * </td>
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<td class="paramname"><em>addr</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Allocate virtual pages at a specific address & map them to newly allocated physical memory. </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">num_pages</td><td>The number of pages to allocate. </td></tr>
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<tr><td class="paramname">addr</td><td>The adress to start allocation at. </td></tr>
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</table>
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</dd>
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</dl>
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</div>
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</div>
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<a id="a6acaea424d9bee06bf95ceb299d75a11"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a6acaea424d9bee06bf95ceb299d75a11">◆ </a></span>dealloc_pages()</h2>
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<td class="memname">void dealloc_pages </td>
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<td>(</td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>num_pages</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">void * </td>
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<td class="paramname"><em>addr</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</div><div class="memdoc">
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<p>Deallocate the physical memory for pages and unmap them </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">num_pages</td><td>The number of pages to deallocate. </td></tr>
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<tr><td class="paramname">addr</td><td>The adress to start deallocation at. </td></tr>
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</table>
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</dd>
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</dl>
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<a id="a1675ea0f8e4994b4fbbbe3984ca522b1"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a1675ea0f8e4994b4fbbbe3984ca522b1">◆ </a></span>find_free_pages()</h2>
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<td class="memname">void* find_free_pages </td>
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<td>(</td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>num_pages</em></td><td>)</td>
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<td></td>
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<p>Finds free virtual pages and returns the start address </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">num_pages</td><td>The minimum size of the free area </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>the start of the free area </dd></dl>
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</div>
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</div>
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<a id="a7554d075a99f52e3303d1ffd90d8c166"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a7554d075a99f52e3303d1ffd90d8c166">◆ </a></span>get_address_space()</h2>
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<td class="memname">void* get_address_space </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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</div><div class="memdoc">
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<p>Get the current address space </p><dl class="section return"><dt>Returns</dt><dd>a pointer to the current address space in physical memory. </dd></dl>
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</div>
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</div>
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<a id="a348bcf40a7b8895924343598c3bf5f23"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a348bcf40a7b8895924343598c3bf5f23">◆ </a></span>is_page_present()</h2>
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<td class="memname">char is_page_present </td>
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<td>(</td>
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<td class="paramtype">size_t </td>
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<td class="paramname"><em>page</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Checks whether a page is present </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">page</td><td>The page number to check </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>Whether the page is present </dd></dl>
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</div>
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</div>
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<a id="aee63ef1cb665a5aa68a15ab2461d20cd"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#aee63ef1cb665a5aa68a15ab2461d20cd">◆ </a></span>load_address_space()</h2>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">void load_address_space </td>
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<td>(</td>
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<td class="paramtype">void * </td>
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<td class="paramname"><em>address_space</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Load an address space </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">address_space</td><td>The address space to load </td></tr>
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</table>
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</dd>
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</dl>
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</div>
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</div>
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<a id="a2370886c08cc1b84fa1d81fc8022db9b"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a2370886c08cc1b84fa1d81fc8022db9b">◆ </a></span>map_pages()</h2>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">void map_pages </td>
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<td>(</td>
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<td class="paramtype">void * </td>
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<td class="paramname"><em>virt_addr_ptr</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">void * </td>
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<td class="paramname"><em>phys_addr_ptr</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>num_pages</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">char </td>
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<td class="paramname"><em>usr</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">char </td>
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<td class="paramname"><em>wr</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Map virtual pages to physical frames. </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">virt_addr_ptr</td><td>The start of the virtual range to map. </td></tr>
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<tr><td class="paramname">phys_addr_ptr</td><td>The start of the physical range to map. </td></tr>
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<tr><td class="paramname">num_pages</td><td>The number of pages to map. </td></tr>
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<tr><td class="paramname">usr</td><td>Are the pages acessible by user mode code </td></tr>
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<tr><td class="paramname">wr</td><td>Are the pages writable by user mode code (kernel always has write permissions) </td></tr>
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</table>
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</dd>
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</dl>
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</div>
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</div>
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<a id="a569adfd13ea3c63741f64108821b1712"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a569adfd13ea3c63741f64108821b1712">◆ </a></span>paging_init()</h2>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">void paging_init </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Initialize paging </p>
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</div>
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</div>
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<a id="a8b1cb213f5783b7137f40279db762ffc"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a8b1cb213f5783b7137f40279db762ffc">◆ </a></span>paging_new_address_space()</h2>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">void* paging_new_address_space </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Create a new address space </p><dl class="section return"><dt>Returns</dt><dd>a pointer to the new address space in physical memory. </dd></dl>
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</div>
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</div>
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<a id="a8b40f4b94c1ee447f4f59b8e1c7d7227"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a8b40f4b94c1ee447f4f59b8e1c7d7227">◆ </a></span>unmap_pages()</h2>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">void unmap_pages </td>
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<td>(</td>
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<td class="paramtype">void * </td>
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<td class="paramname"><em>start_virt</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>num_pages</em>, </td>
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</tr>
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<tr>
|
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>free_phys</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Unmap virtual pages, </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">start_virt</td><td>The start of the virtual range to unmap. </td></tr>
|
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<tr><td class="paramname">num_pages</td><td>The number of pages to map. </td></tr>
|
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<tr><td class="paramname">free_phys</td><td>Also free the physical pages the virtual pages are mapped to. </td></tr>
|
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</table>
|
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</dd>
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</dl>
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</div>
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</div>
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<a id="af473eee5243c70174a1245d70a5c16fa"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#af473eee5243c70174a1245d70a5c16fa">◆ </a></span>virt_to_phys()</h2>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">void* virt_to_phys </td>
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<td>(</td>
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<td class="paramtype">void * </td>
|
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<td class="paramname"><em>virt_addr</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Convert a virtual address to a physical one. </p><dl class="params"><dt>Parameters</dt><dd>
|
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<table class="params">
|
|
<tr><td class="paramname">virt_addr</td><td>The virtual address to convert </td></tr>
|
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</table>
|
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</dd>
|
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</dl>
|
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<dl class="section return"><dt>Returns</dt><dd>the physical adress it maps to, or NULL if it is not mapped. </dd></dl>
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</div>
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</div>
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