181 lines
18 KiB
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181 lines
18 KiB
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<div class="headertitle"><div class="title">splitlog2.h</div></div>
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<a href="splitlog2_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">/*</span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment"> * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de></span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment"> * economic rights: Technische Universität Dresden (Germany)</span></div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment"> * License: see LICENSE.spdx (in this directory or the directories above)</span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment"> */</span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#ifndef __L4UTIL__INCLUDE__SPLITLOG2_H__</span></div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#define __L4UTIL__INCLUDE__SPLITLOG2_H__</span></div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> </div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include <l4/sys/linkage.h></span></div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include <<a class="code" href="err_8h.html">l4/sys/err.h</a>></span></div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor">#include <<a class="code" href="bitops_8h.html">l4/util/bitops.h</a>></span></div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><a class="code hl_define" href="group__l4sys__defines.html#ga5f022ce5422df9cc6ed415e2bfc90f59">L4_BEGIN_DECLS</a></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span></div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><a class="code hl_define" href="group__l4sys__defines.html#ga427377e23e3680dc178035d391b2ca45">L4_INLINE</a> <span class="keywordtype">long</span></div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><a class="code hl_function" href="group__l4util__api.html#ga930c5929d2ab29c3552b765e3c967b83">l4util_splitlog2_hdl</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> start, <a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> end,</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="keywordtype">long</span> (*handler)(<a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> s, <a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> e, <span class="keywordtype">int</span> log2size));</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span></div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span><a class="code hl_define" href="group__l4sys__defines.html#ga427377e23e3680dc178035d391b2ca45">L4_INLINE</a> <a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a></div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span><a class="code hl_function" href="group__l4util__api.html#ga4b64c17b6e4392997addc015b4ed53ab">l4util_splitlog2_size</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> start, <a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> end);</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> </div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><a class="code hl_define" href="group__l4sys__defines.html#ga7b3d88f2118cbb7b8057a860dbdd0381">L4_END_DECLS</a></div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> </div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="comment">/* Implementation */</span></div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> </div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span><a class="code hl_define" href="group__l4sys__defines.html#ga427377e23e3680dc178035d391b2ca45">L4_INLINE</a> <span class="keywordtype">long</span></div>
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<div class="foldopen" id="foldopen00051" data-start="{" data-end="}">
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"><a class="line" href="group__l4util__api.html#ga930c5929d2ab29c3552b765e3c967b83"> 51</a></span><a class="code hl_function" href="group__l4util__api.html#ga930c5929d2ab29c3552b765e3c967b83">l4util_splitlog2_hdl</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> start, <a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> end,</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="keywordtype">long</span> (*handler)(<a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> s, <a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> e, <span class="keywordtype">int</span> log2size))</div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span>{</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keywordflow">if</span> (end < start)</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="keywordflow">return</span> -<a class="code hl_enumvalue" href="group__l4__error__api.html#ggab4c8abc71ffa221a25c1ca5840a354f9a54ddbebc30b661c87177b968a77588b8">L4_EINVAL</a>;</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> </div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keywordflow">while</span> (start <= end)</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> {</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keywordtype">long</span> retval;</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordtype">int</span> len2 = <a class="code hl_function" href="group__l4util__api.html#ga4b64c17b6e4392997addc015b4ed53ab">l4util_splitlog2_size</a>(start, end);</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> len = 1UL << len2;</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="keywordflow">if</span> ((retval = handler(start, start + len - 1, len2)))</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <span class="keywordflow">return</span> retval;</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> start += len;</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> }</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">return</span> 0;</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span>}</div>
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</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> </div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span><a class="code hl_define" href="group__l4sys__defines.html#ga427377e23e3680dc178035d391b2ca45">L4_INLINE</a> <a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a></div>
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<div class="foldopen" id="foldopen00070" data-start="{" data-end="}">
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"><a class="line" href="group__l4util__api.html#ga4b64c17b6e4392997addc015b4ed53ab"> 70</a></span><a class="code hl_function" href="group__l4util__api.html#ga4b64c17b6e4392997addc015b4ed53ab">l4util_splitlog2_size</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> start, <a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> end)</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span>{</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="keywordtype">int</span> start_bits = l4util_bsf(start);</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordtype">int</span> len_bits = l4util_bsr(end - start + 1);</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keywordflow">if</span> (start_bits != -1 && len_bits > start_bits)</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> len_bits = start_bits;</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> </div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keywordflow">return</span> len_bits;</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span>}</div>
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</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> </div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span><span class="preprocessor">#endif </span><span class="comment">/* ! __L4UTIL__INCLUDE__SPLITLOG2_H__ */</span><span class="preprocessor"></span></div>
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<div class="ttc" id="abitops_8h_html"><div class="ttname"><a href="bitops_8h.html">bitops.h</a></div><div class="ttdoc">bit manipulation functions</div></div>
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<div class="ttc" id="aerr_8h_html"><div class="ttname"><a href="err_8h.html">err.h</a></div><div class="ttdoc">Error codes.</div></div>
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<div class="ttc" id="agroup__l4__basic__types_html_ga4087b991c40c0d2fcde9ca331049a4d4"><div class="ttname"><a href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a></div><div class="ttdeci">unsigned long l4_addr_t</div><div class="ttdoc">Address type.</div><div class="ttdef"><b>Definition</b> <a href="l4_2sys_2l4int_8h_source.html#l00034">l4int.h:34</a></div></div>
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<div class="ttc" id="agroup__l4__error__api_html_ggab4c8abc71ffa221a25c1ca5840a354f9a54ddbebc30b661c87177b968a77588b8"><div class="ttname"><a href="group__l4__error__api.html#ggab4c8abc71ffa221a25c1ca5840a354f9a54ddbebc30b661c87177b968a77588b8">L4_EINVAL</a></div><div class="ttdeci">@ L4_EINVAL</div><div class="ttdoc">Invalid argument.</div><div class="ttdef"><b>Definition</b> <a href="err_8h_source.html#l00046">err.h:46</a></div></div>
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<div class="ttc" id="agroup__l4sys__defines_html_ga427377e23e3680dc178035d391b2ca45"><div class="ttname"><a href="group__l4sys__defines.html#ga427377e23e3680dc178035d391b2ca45">L4_INLINE</a></div><div class="ttdeci">#define L4_INLINE</div><div class="ttdoc">L4 Inline function attribute.</div><div class="ttdef"><b>Definition</b> <a href="compiler_8h_source.html#l00051">compiler.h:51</a></div></div>
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<div class="ttc" id="agroup__l4sys__defines_html_ga5f022ce5422df9cc6ed415e2bfc90f59"><div class="ttname"><a href="group__l4sys__defines.html#ga5f022ce5422df9cc6ed415e2bfc90f59">L4_BEGIN_DECLS</a></div><div class="ttdeci">#define L4_BEGIN_DECLS</div><div class="ttdoc">Start section with C types and functions.</div><div class="ttdef"><b>Definition</b> <a href="compiler_8h_source.html#l00165">compiler.h:165</a></div></div>
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<div class="ttc" id="agroup__l4sys__defines_html_ga7b3d88f2118cbb7b8057a860dbdd0381"><div class="ttname"><a href="group__l4sys__defines.html#ga7b3d88f2118cbb7b8057a860dbdd0381">L4_END_DECLS</a></div><div class="ttdeci">#define L4_END_DECLS</div><div class="ttdoc">End section with C types and functions.</div><div class="ttdef"><b>Definition</b> <a href="compiler_8h_source.html#l00166">compiler.h:166</a></div></div>
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<div class="ttc" id="agroup__l4util__api_html_ga4b64c17b6e4392997addc015b4ed53ab"><div class="ttname"><a href="group__l4util__api.html#ga4b64c17b6e4392997addc015b4ed53ab">l4util_splitlog2_size</a></div><div class="ttdeci">l4_addr_t l4util_splitlog2_size(l4_addr_t start, l4_addr_t end)</div><div class="ttdoc">Return log2 base and size aligned length of a range.</div><div class="ttdef"><b>Definition</b> <a href="#l00070">splitlog2.h:70</a></div></div>
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<div class="ttc" id="agroup__l4util__api_html_ga930c5929d2ab29c3552b765e3c967b83"><div class="ttname"><a href="group__l4util__api.html#ga930c5929d2ab29c3552b765e3c967b83">l4util_splitlog2_hdl</a></div><div class="ttdeci">L4_BEGIN_DECLS long l4util_splitlog2_hdl(l4_addr_t start, l4_addr_t end, long(*handler)(l4_addr_t s, l4_addr_t e, int log2size))</div><div class="ttdoc">Split a range into log2 base and size aligned chunks.</div><div class="ttdef"><b>Definition</b> <a href="#l00051">splitlog2.h:51</a></div></div>
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<li class="navelem"><b>l4</b></li><li class="navelem"><b>util</b></li><li class="navelem"><a href="splitlog2_8h.html">splitlog2.h</a></li>
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<li class="footer">Generated on <span class="timestamp"></span> for L4Re Operating System Framework by <a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.15.0 </li>
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