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| <td width="10%" class="headerValue"><a href="../../../index.html">top level</a> - <a href="index.html">external/ffspart/libflash</a> - ecc.h<span style="font-size: 80%;"> (source / <a href="ecc.h.func-c.html">functions</a>)</span></td> |
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| <td class="headerValue">skiboot.info</td> |
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| <td class="headerItem">Lines:</td> |
| <td class="headerCovTableEntryHi">100.0 %</td> |
| <td class="headerCovTableEntry">8</td> |
| <td class="headerCovTableEntry">8</td> |
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| <td class="headerItem">Test Date:</td> |
| <td class="headerValue">2025-06-27 16:54:26</td> |
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| <td class="headerCovTableEntryHi">-</td> |
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| <td class="headerCovTableEntry">0</td> |
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| <pre class="sourceHeading"> Branch data Line data Source code</pre> |
| <pre class="source"> |
| <span id="L1"><span class="lineNum"> 1</span> : : // SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later</span> |
| <span id="L2"><span class="lineNum"> 2</span> : : /*</span> |
| <span id="L3"><span class="lineNum"> 3</span> : : * This is based on the hostboot ecc code</span> |
| <span id="L4"><span class="lineNum"> 4</span> : : *</span> |
| <span id="L5"><span class="lineNum"> 5</span> : : * Copyright 2013-2018 IBM Corp.</span> |
| <span id="L6"><span class="lineNum"> 6</span> : : */</span> |
| <span id="L7"><span class="lineNum"> 7</span> : : </span> |
| <span id="L8"><span class="lineNum"> 8</span> : : #ifndef __ECC_H</span> |
| <span id="L9"><span class="lineNum"> 9</span> : : #define __ECC_H</span> |
| <span id="L10"><span class="lineNum"> 10</span> : : </span> |
| <span id="L11"><span class="lineNum"> 11</span> : : #include <stdint.h></span> |
| <span id="L12"><span class="lineNum"> 12</span> : : #include <ccan/endian/endian.h></span> |
| <span id="L13"><span class="lineNum"> 13</span> : : </span> |
| <span id="L14"><span class="lineNum"> 14</span> : : struct ecc64 {</span> |
| <span id="L15"><span class="lineNum"> 15</span> : : beint64_t data;</span> |
| <span id="L16"><span class="lineNum"> 16</span> : : uint8_t ecc;</span> |
| <span id="L17"><span class="lineNum"> 17</span> : : } __attribute__((__packed__));</span> |
| <span id="L18"><span class="lineNum"> 18</span> : : </span> |
| <span id="L19"><span class="lineNum"> 19</span> : : extern int memcpy_from_ecc(beint64_t *dst, struct ecc64 *src, uint64_t len);</span> |
| <span id="L20"><span class="lineNum"> 20</span> : : extern int memcpy_from_ecc_unaligned(beint64_t *dst, struct ecc64 *src, uint64_t len,</span> |
| <span id="L21"><span class="lineNum"> 21</span> : : uint8_t alignment);</span> |
| <span id="L22"><span class="lineNum"> 22</span> : : </span> |
| <span id="L23"><span class="lineNum"> 23</span> : : extern int memcpy_to_ecc(struct ecc64 *dst, const beint64_t *src, uint64_t len);</span> |
| <span id="L24"><span class="lineNum"> 24</span> : : extern int memcpy_to_ecc_unaligned(struct ecc64 *dst, const beint64_t *src, uint64_t len,</span> |
| <span id="L25"><span class="lineNum"> 25</span> : : uint8_t alignment);</span> |
| <span id="L26"><span class="lineNum"> 26</span> : : </span> |
| <span id="L27"><span class="lineNum"> 27</span> : : /*</span> |
| <span id="L28"><span class="lineNum"> 28</span> : : * Calculate the size of a buffer if ECC is added</span> |
| <span id="L29"><span class="lineNum"> 29</span> : : *</span> |
| <span id="L30"><span class="lineNum"> 30</span> : : * We add 1 byte of ecc for every 8 bytes of data. So we need to round up to 8</span> |
| <span id="L31"><span class="lineNum"> 31</span> : : * bytes length and then add 1/8</span> |
| <span id="L32"><span class="lineNum"> 32</span> : : */</span> |
| <span id="L33"><span class="lineNum"> 33</span> : : #ifndef ALIGN_UP</span> |
| <span id="L34"><span class="lineNum"> 34</span> : : #define ALIGN_UP(_v, _a) (((_v) + (_a) - 1) & ~((_a) - 1))</span> |
| <span id="L35"><span class="lineNum"> 35</span> : : #endif</span> |
| <span id="L36"><span class="lineNum"> 36</span> : : </span> |
| <span id="L37"><span class="lineNum"> 37</span> : : #define BYTES_PER_ECC 8</span> |
| <span id="L38"><span class="lineNum"> 38</span> : : </span> |
| <span id="L39"><span class="lineNum"> 39</span> :<span class="tlaGNC tlaBgGNC"> 20 : static inline uint64_t ecc_size(uint64_t len)</span></span> |
| <span id="L40"><span class="lineNum"> 40</span> : : {</span> |
| <span id="L41"><span class="lineNum"> 41</span> :<span class="tlaGNC"> 20 : return ALIGN_UP(len, BYTES_PER_ECC) >> 3;</span></span> |
| <span id="L42"><span class="lineNum"> 42</span> : : }</span> |
| <span id="L43"><span class="lineNum"> 43</span> : : </span> |
| <span id="L44"><span class="lineNum"> 44</span> :<span class="tlaGNC"> 20 : static inline uint64_t ecc_buffer_size(uint64_t len)</span></span> |
| <span id="L45"><span class="lineNum"> 45</span> : : {</span> |
| <span id="L46"><span class="lineNum"> 46</span> :<span class="tlaGNC"> 20 : return ALIGN_UP(len, BYTES_PER_ECC) + ecc_size(len);</span></span> |
| <span id="L47"><span class="lineNum"> 47</span> : : }</span> |
| <span id="L48"><span class="lineNum"> 48</span> : : </span> |
| <span id="L49"><span class="lineNum"> 49</span> : : static inline int ecc_buffer_size_check(uint64_t len)</span> |
| <span id="L50"><span class="lineNum"> 50</span> : : {</span> |
| <span id="L51"><span class="lineNum"> 51</span> : : return len % (BYTES_PER_ECC + 1);</span> |
| <span id="L52"><span class="lineNum"> 52</span> : : }</span> |
| <span id="L53"><span class="lineNum"> 53</span> : : </span> |
| <span id="L54"><span class="lineNum"> 54</span> :<span class="tlaGNC"> 40 : static inline uint64_t ecc_buffer_size_minus_ecc(uint64_t len)</span></span> |
| <span id="L55"><span class="lineNum"> 55</span> : : {</span> |
| <span id="L56"><span class="lineNum"> 56</span> :<span class="tlaGNC"> 40 : return len * BYTES_PER_ECC / (BYTES_PER_ECC + 1);</span></span> |
| <span id="L57"><span class="lineNum"> 57</span> : : }</span> |
| <span id="L58"><span class="lineNum"> 58</span> : : </span> |
| <span id="L59"><span class="lineNum"> 59</span> :<span class="tlaGNC"> 20 : static inline uint64_t ecc_buffer_align(uint64_t start, uint64_t pos)</span></span> |
| <span id="L60"><span class="lineNum"> 60</span> : : {</span> |
| <span id="L61"><span class="lineNum"> 61</span> :<span class="tlaGNC"> 20 : return pos - ((pos - start) % (BYTES_PER_ECC + 1));</span></span> |
| <span id="L62"><span class="lineNum"> 62</span> : : }</span> |
| <span id="L63"><span class="lineNum"> 63</span> : : </span> |
| <span id="L64"><span class="lineNum"> 64</span> : : #endif</span> |
| </pre> |
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