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<a href="avs__aes_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">* \file avs_aes.c</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">* \brief AES Avalon IP Core software driver </span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">*</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">* This file is part of the project avs_aes</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">* see: http://opencores.org/project,avs_aes</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">* </span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">* \section AUTHORS</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">* Thomas Ruschival -- ruschi@opencores.org (www.ruschival.de)</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">* </span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">* \section LICENSE</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">* Copyright (c) 2009, Authors and opencores.org</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">* All rights reserved.</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">* </span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">* Redistribution and use in source and binary forms, with or without modification,</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">* are permitted provided that the following conditions are met:</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">* * Redistributions of source code must retain the above copyright notice,</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">* this list of conditions and the following disclaimer.</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">* * Redistributions in binary form must reproduce the above copyright notice,</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">* this list of conditions and the following disclaimer in the documentation</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">* and/or other materials provided with the distribution.</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">* * Neither the name of the organization nor the names of its contributors</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">* may be used to endorse or promote products derived from this software without</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">* specific prior written permission.</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE</span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF</span></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)</span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF</span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">* THE POSSIBILITY OF SUCH DAMAGE </span></div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">*/</span></div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include <<a class="code" href="avs__aes_8h.html" title="header file for AES Avalon IP Core software driver offers interfaces to convinient access to the core...">avs_aes.h</a>></span></div>
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| 109 |
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include <string.h></span></div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include <stdint.h></span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"></span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">/** memory offset for key DON'T CHANGE! */</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"><a class="code" href="avs__aes_8c.html#aac9313626ecf492e39b0f4add66e370d"> 44</a></span> <span class="keyword">const</span> uint32_t <a class="code" href="avs__aes_8c.html#aac9313626ecf492e39b0f4add66e370d" title="memory offset for key DON'T CHANGE! ">KEY_ADDR</a> = <a class="code" href="avs__aes_8h.html#aa93e16f5419a2515d4ebbd5368e9a8c5" title="base address of the Avalon Slave component in memory map ">AES_BASEADDR</a>;<span class="comment"></span></div>
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| 114 |
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">/** memory offset of payload */</span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"><a class="code" href="avs__aes_8c.html#a994843be3758f70aa91454a9ddfacb19"> 46</a></span> <span class="keyword">const</span> uint32_t <a class="code" href="avs__aes_8c.html#a994843be3758f70aa91454a9ddfacb19" title="memory offset of payload ">DATA_ADDR</a> = <a class="code" href="avs__aes_8h.html#aa93e16f5419a2515d4ebbd5368e9a8c5" title="base address of the Avalon Slave component in memory map ">AES_BASEADDR</a>+0x08;<span class="comment"></span></div>
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| 116 |
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">/** memory offset of result */</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"><a class="code" href="avs__aes_8c.html#a192250a419c33c4ff96948f692a44254"> 48</a></span> <span class="keyword">const</span> uint32_t <a class="code" href="avs__aes_8c.html#a192250a419c33c4ff96948f692a44254" title="memory offset of result ">RESULT_ADDR</a> = <a class="code" href="avs__aes_8h.html#aa93e16f5419a2515d4ebbd5368e9a8c5" title="base address of the Avalon Slave component in memory map ">AES_BASEADDR</a>+0x10;<span class="comment"></span></div>
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| 118 |
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">/** memory offset for control word */</span></div>
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<div class="line"><a name="l00050"></a><span class="lineno"><a class="code" href="avs__aes_8c.html#a30e81662ebaec8c1b8a283c42e88df36"> 50</a></span> <span class="keyword">const</span> uint32_t <a class="code" href="avs__aes_8c.html#a30e81662ebaec8c1b8a283c42e88df36" title="memory offset for control word ">AESCTRLWD</a> = <a class="code" href="avs__aes_8h.html#aa93e16f5419a2515d4ebbd5368e9a8c5" title="base address of the Avalon Slave component in memory map ">AES_BASEADDR</a>+0x18;</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a name="l00053"></a><span class="lineno"><a class="code" href="avs__aes_8h.html#a962dd946798faab0e83d401c7d43c33c"> 53</a></span> <span class="keywordtype">void</span> <a class="code" href="avs__aes_8c.html#a962dd946798faab0e83d401c7d43c33c" title="setup the context to be used later. ">avs_aes_init</a>(<a class="code" href="structavs__aes__handle.html" title="object storing addresses for this Avalon AES slave might be useful in case there are more attached...">avs_aes_handle</a>* context){</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  context-><a class="code" href="structavs__aes__handle.html#acb9eb474c8310afe4b082b79914f274c" title="pointer to key field in memory mapping ">key</a> = (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>*) <a class="code" href="avs__aes_8c.html#aac9313626ecf492e39b0f4add66e370d" title="memory offset for key DON'T CHANGE! ">KEY_ADDR</a>;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  context-><a class="code" href="structavs__aes__handle.html#adae23dc33b7dec54b9da34f347256214" title="pointer to data field in memory mapping used for both decryption and encryption ">payload</a>= (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>*) <a class="code" href="avs__aes_8c.html#a994843be3758f70aa91454a9ddfacb19" title="memory offset of payload ">DATA_ADDR</a>;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  context-><a class="code" href="structavs__aes__handle.html#ae0ad9e7bde68d07c018a299a0cda66af" title="pointer to result field in memory mapping ">result</a> = (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>*) <a class="code" href="avs__aes_8c.html#a192250a419c33c4ff96948f692a44254" title="memory offset of result ">RESULT_ADDR</a>;</div>
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| 126 |
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  context-><a class="code" href="structavs__aes__handle.html#a15143869a0c8bfcacc8e1839e4e789c9" title="pointer to control word ">control</a> = (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>*) <a class="code" href="avs__aes_8c.html#a30e81662ebaec8c1b8a283c42e88df36" title="memory offset for control word ">AESCTRLWD</a>;</div>
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| 127 |
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  *(context-><a class="code" href="structavs__aes__handle.html#a15143869a0c8bfcacc8e1839e4e789c9" title="pointer to control word ">control</a>) = 0x00000000;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> }</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div>
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<div class="line"><a name="l00062"></a><span class="lineno"><a class="code" href="avs__aes_8h.html#af18edc2beecc3842a131423f55c7636a"> 62</a></span> <span class="keywordtype">void</span> <a class="code" href="avs__aes_8c.html#af18edc2beecc3842a131423f55c7636a" title="Set a new key This call asserts the KEY_VALID flag and triggers the key-expansion in the core...">avs_aes_setKey</a>(<a class="code" href="structavs__aes__handle.html" title="object storing addresses for this Avalon AES slave might be useful in case there are more attached...">avs_aes_handle</a>* context, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>* key){</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordtype">int</span> i=0;</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>* target_ptr = (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>* )context-><a class="code" href="structavs__aes__handle.html#acb9eb474c8310afe4b082b79914f274c" title="pointer to key field in memory mapping ">key</a>;</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="comment">/* Invalidate old key; */</span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  *(context-><a class="code" href="structavs__aes__handle.html#a15143869a0c8bfcacc8e1839e4e789c9" title="pointer to control word ">control</a>) &= (~<a class="code" href="group__control-register.html#gaf27449032ce353aa329edd80cd2759a5" title="Signal load of new key valid. ">KEY_VALID</a>);</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">asm</span> __volatile(<span class="stringliteral">"sync"</span> :::);</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">for</span>(i=0; i<<a class="code" href="avs__aes_8h.html#a40ac9fbe108b0ea74f57215528f13196" title="Keylength 256 Bit AES. ">KEYWORDS</a>; i++){</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  *(target_ptr++) = *(key++);</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  }</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keyword">asm</span> __volatile(<span class="stringliteral">"sync"</span> :::);</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">/* validate key */</span></div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  *(context-><a class="code" href="structavs__aes__handle.html#a15143869a0c8bfcacc8e1839e4e789c9" title="pointer to control word ">control</a>) |= <a class="code" href="group__control-register.html#gaf27449032ce353aa329edd80cd2759a5" title="Signal load of new key valid. ">KEY_VALID</a>;</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> }</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div>
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<div class="line"><a name="l00077"></a><span class="lineno"><a class="code" href="avs__aes_8h.html#a22f9afae76f645e31b514b5aa4df2cc1"> 77</a></span> <span class="keywordtype">void</span> <a class="code" href="avs__aes_8c.html#a22f9afae76f645e31b514b5aa4df2cc1" title="loads payload for processing to the core basically memcopy... ">avs_aes_setPayload</a>(<a class="code" href="structavs__aes__handle.html" title="object storing addresses for this Avalon AES slave might be useful in case there are more attached...">avs_aes_handle</a>* context, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>* payload){</div>
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| 147 |
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordtype">int</span> i=0;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>* target_ptr = (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>* )context-><a class="code" href="structavs__aes__handle.html#adae23dc33b7dec54b9da34f347256214" title="pointer to data field in memory mapping used for both decryption and encryption ">payload</a>;</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">for</span>(i=0; i<4; i++){</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  *(target_ptr++) = *(payload++);</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  } </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> }</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div>
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<div class="line"><a name="l00086"></a><span class="lineno"><a class="code" href="avs__aes_8h.html#a55f078baaf019797ab6de7ea1a02475f"> 86</a></span> <span class="keywordtype">void</span> <a class="code" href="avs__aes_8c.html#a55f078baaf019797ab6de7ea1a02475f" title="set the KEY_VALID flag in the control word used to signal the completion of writing the key ( avs_aes...">avs_aes_setKeyvalid</a>(<a class="code" href="structavs__aes__handle.html" title="object storing addresses for this Avalon AES slave might be useful in case there are more attached...">avs_aes_handle</a>* context){</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  *(context-><a class="code" href="structavs__aes__handle.html#a15143869a0c8bfcacc8e1839e4e789c9" title="pointer to control word ">control</a>) |= <a class="code" href="group__control-register.html#gaf27449032ce353aa329edd80cd2759a5" title="Signal load of new key valid. ">KEY_VALID</a>;</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">asm</span> __volatile(<span class="stringliteral">"sync"</span> :::);</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> }</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div>
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<div class="line"><a name="l00092"></a><span class="lineno"><a class="code" href="avs__aes_8h.html#acea23b2ab998f18b9aca810765632cac"> 92</a></span> <span class="keywordtype">void</span> <a class="code" href="avs__aes_8c.html#acea23b2ab998f18b9aca810765632cac" title="set the ENCRYPT flag in the control word start encryption of (hopefully) previously loaded payload ...">avs_aes_encrypt</a>(<a class="code" href="structavs__aes__handle.html" title="object storing addresses for this Avalon AES slave might be useful in case there are more attached...">avs_aes_handle</a>* context){</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  *(context-><a class="code" href="structavs__aes__handle.html#a15143869a0c8bfcacc8e1839e4e789c9" title="pointer to control word ">control</a>) |= <a class="code" href="group__control-register.html#ga1cb0c60ca582db30ae87362ca43e8c19" title="start encryption bit ">ENCRYPT</a>;</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">asm</span> __volatile(<span class="stringliteral">"sync"</span> :::);</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> }</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div>
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<div class="line"><a name="l00098"></a><span class="lineno"><a class="code" href="avs__aes_8h.html#aef16b7ecbb1b091934a9c670ce3b2fcf"> 98</a></span> <span class="keywordtype">void</span> <a class="code" href="avs__aes_8c.html#aef16b7ecbb1b091934a9c670ce3b2fcf" title="set the DECRYPT flag in the control word start encryption of (hopefully) previously loaded payload ...">avs_aes_decrypt</a>(<a class="code" href="structavs__aes__handle.html" title="object storing addresses for this Avalon AES slave might be useful in case there are more attached...">avs_aes_handle</a>* context) {</div>
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| 168 |
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  *(context-><a class="code" href="structavs__aes__handle.html#a15143869a0c8bfcacc8e1839e4e789c9" title="pointer to control word ">control</a>) |= <a class="code" href="group__control-register.html#ga36fab47015485191712a579a059a7c20" title="Start decryption bit. ">DECRYPT</a>;</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keyword">asm</span> __volatile(<span class="stringliteral">"sync"</span> :::);</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> }</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div>
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<div class="line"><a name="l00104"></a><span class="lineno"><a class="code" href="avs__aes_8h.html#a827a78f73dd8fef9d2c9e72ad9bb4ea9"> 104</a></span> <span class="keywordtype">int</span> <a class="code" href="avs__aes_8c.html#a827a78f73dd8fef9d2c9e72ad9bb4ea9" title="checks the COMPLETED flag can be used for ugly polling the slave if IRQs are not used ...">avs_aes_isBusy</a>(<a class="code" href="structavs__aes__handle.html" title="object storing addresses for this Avalon AES slave might be useful in case there are more attached...">avs_aes_handle</a>* context) {</div>
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| 174 |
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> mycontrol = *(context-><a class="code" href="structavs__aes__handle.html#a15143869a0c8bfcacc8e1839e4e789c9" title="pointer to control word ">control</a>); </div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">return</span> mycontrol & (<a class="code" href="group__control-register.html#ga36fab47015485191712a579a059a7c20" title="Start decryption bit. ">DECRYPT</a> | <a class="code" href="group__control-register.html#ga1cb0c60ca582db30ae87362ca43e8c19" title="start encryption bit ">ENCRYPT</a>);</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> }</div>
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</div><!-- fragment --></div><!-- contents -->
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</div><!-- doc-content -->
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<li class="navelem"><a class="el" href="avs__aes_8c.html">avs_aes.c</a></li>
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<li class="footer">Generated on Sat Apr 19 2014 17:55:55 for AES Avalon Slave (avs_aes) by
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.4 </li>
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