#ifndef SPLIT_KEYBOARD_UTIL_H
#define SPLIT_KEYBOARD_UTIL_H
#include <stdbool.h>
#include "eeconfig.h"
#define SLAVE_I2C_ADDRESS 0x32
extern volatile bool isLeftHand;
// slave version of matix scan, defined in matrix.c
void matrix_slave_scan(void);
void split_keyboard_setup(void);
bool has_usb(void);
void keyboard_slave_loop(void);
void matrix_master_OLED_init (void);
#endif
patch?h=master' type='application/atom+xml'/>
<link rel='vcs-git' href='git://git.panaceas.org/openwrt/upstream' title='openwrt/upstream Git repository'/>
<link rel='vcs-git' href='ssh://git@git.panaceas.org/git/openwrt/upstream' title='openwrt/upstream Git repository'/>
</head>
<body>
<div id='cgit'><table id='header'>
<tr>
<td class='logo' rowspan='2'><a href='/cgit/'><img src='/cgit.png' alt='cgit logo'/></a></td>
<td class='main'><a href='/cgit/'>index</a> : <a title='openwrt/upstream' href='/cgit/openwrt/upstream/'>openwrt/upstream</a></td><td class='form'><form method='get'>
<input type='hidden' name='id' value='400ab1802f2b35fc544dc9363b67925069a26f80'/><select name='h' onchange='this.form.submit();'>
<option value='attitude_adjustment'>attitude_adjustment</option>
<option value='barrier_breaker'>barrier_breaker</option>
<option value='chaos_calmer'>chaos_calmer</option>
<option value='lede-17.01'>lede-17.01</option>
<option value='less-old-master'>less-old-master</option>
<option value='master' selected='selected'>master</option>
<option value='old-master'>old-master</option>
<option value='openwrt-18.06'>openwrt-18.06</option>
<option value='openwrt-19.07'>openwrt-19.07</option>
<option value='upstream'>upstream</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>upstream openwrt</td><td class='sub right'>James</td></tr></table>
<table class='tabs'><tr><td>
<a href='/cgit/openwrt/upstream/about/'>about</a><a href='/cgit/openwrt/upstream/'>summary</a><a href='/cgit/openwrt/upstream/refs/?id=400ab1802f2b35fc544dc9363b67925069a26f80'>refs</a><a href='/cgit/openwrt/upstream/log/target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch'>log</a><a class='active' href='/cgit/openwrt/upstream/tree/target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch?id=400ab1802f2b35fc544dc9363b67925069a26f80'>tree</a><a href='/cgit/openwrt/upstream/commit/target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch?id=400ab1802f2b35fc544dc9363b67925069a26f80'>commit</a><a href='/cgit/openwrt/upstream/diff/target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch?id=400ab1802f2b35fc544dc9363b67925069a26f80'>diff</a><a href='/cgit/openwrt/upstream/stats/target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch'>stats</a></td><td class='form'><form class='right' method='get' action='/cgit/openwrt/upstream/log/target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch'>
<input type='hidden' name='id' value='400ab1802f2b35fc544dc9363b67925069a26f80'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit/openwrt/upstream/tree/?id=400ab1802f2b35fc544dc9363b67925069a26f80'>root</a>/<a href='/cgit/openwrt/upstream/tree/target?id=400ab1802f2b35fc544dc9363b67925069a26f80'>target</a>/<a href='/cgit/openwrt/upstream/tree/target/linux?id=400ab1802f2b35fc544dc9363b67925069a26f80'>linux</a>/<a href='/cgit/openwrt/upstream/tree/target/linux/generic?id=400ab1802f2b35fc544dc9363b67925069a26f80'>generic</a>/<a href='/cgit/openwrt/upstream/tree/target/linux/generic/patches-3.0?id=400ab1802f2b35fc544dc9363b67925069a26f80'>patches-3.0</a>/<a href='/cgit/openwrt/upstream/tree/target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch?id=400ab1802f2b35fc544dc9363b67925069a26f80'>330-mips-add-crash-and-kdump-support.patch</a></div><div class='content'>blob: 28621c4572e5481f5611da58ede797ddb366b9f1 (<a href='/cgit/openwrt/upstream/plain/target/linux/generic/patches-3.0/330-mips-add-crash-and-kdump-support.patch?id=400ab1802f2b35fc544dc9363b67925069a26f80'>plain</a>)
<table summary='blob content' class='blob'>
<tr><td class='linenumbers'><pre><a id='n1' href='#n1'>1</a>
<a id='n2' href='#n2'>2</a>
<a id='n3' href='#n3'>3</a>
<a id='n4' href='#n4'>4</a>
<a id='n5' href='#n5'>5</a>
<a id='n6' href='#n6'>6</a>
<a id='n7' href='#n7'>7</a>
<a id='n8' href='#n8'>8</a>
<a id='n9' href='#n9'>9</a>
<a id='n10' href='#n10'>10</a>
<a id='n11' href='#n11'>11</a>
<a id='n12' href='#n12'>12</a>
<a id='n13' href='#n13'>13</a>
<a id='n14' href='#n14'>14</a>
<a id='n15' href='#n15'>15</a>
<a id='n16' href='#n16'>16</a>
<a id='n17' href='#n17'>17</a>
<a id='n18' href='#n18'>18</a>
<a id='n19' href='#n19'>19</a>
<a id='n20' href='#n20'>20</a>
<a id='n21' href='#n21'>21</a>
<a id='n22' href='#n22'>22</a>
<a id='n23' href='#n23'>23</a>
<a id='n24' href='#n24'>24</a>
<a id='n25' href='#n25'>25</a>
<a id='n26' href='#n26'>26</a>
<a id='n27' href='#n27'>27</a>
<a id='n28' href='#n28'>28</a>
<a id='n29' href='#n29'>29</a>
<a id='n30' href='#n30'>30</a>
<a id='n31' href='#n31'>31</a>
<a id='n32' href='#n32'>32</a>
<a id='n33' href='#n33'>33</a>
<a id='n34' href='#n34'>34</a>
<a id='n35' href='#n35'>35</a>
<a id='n36' href='#n36'>36</a>
<a id='n37' href='#n37'>37</a>
<a id='n38' href='#n38'>38</a>
<a id='n39' href='#n39'>39</a>
<a id='n40' href='#n40'>40</a>
<a id='n41' href='#n41'>41</a>
<a id='n42' href='#n42'>42</a>
<a id='n43' href='#n43'>43</a>
<a id='n44' href='#n44'>44</a>
<a id='n45' href='#n45'>45</a>
<a id='n46' href='#n46'>46</a>
<a id='n47' href='#n47'>47</a>
<a id='n48' href='#n48'>48</a>
<a id='n49' href='#n49'>49</a>
<a id='n50' href='#n50'>50</a>
<a id='n51' href='#n51'>51</a>
<a id='n52' href='#n52'>52</a>
<a id='n53' href='#n53'>53</a>
<a id='n54' href='#n54'>54</a>
<a id='n55' href='#n55'>55</a>
<a id='n56' href='#n56'>56</a>
<a id='n57' href='#n57'>57</a>
<a id='n58' href='#n58'>58</a>
<a id='n59' href='#n59'>59</a>
<a id='n60' href='#n60'>60</a>
<a id='n61' href='#n61'>61</a>
<a id='n62' href='#n62'>62</a>
<a id='n63' href='#n63'>63</a>
<a id='n64' href='#n64'>64</a>
<a id='n65' href='#n65'>65</a>
<a id='n66' href='#n66'>66</a>
<a id='n67' href='#n67'>67</a>
<a id='n68' href='#n68'>68</a>
<a id='n69' href='#n69'>69</a>
<a id='n70' href='#n70'>70</a>
<a id='n71' href='#n71'>71</a>
<a id='n72' href='#n72'>72</a>
<a id='n73' href='#n73'>73</a>
<a id='n74' href='#n74'>74</a>
<a id='n75' href='#n75'>75</a>
<a id='n76' href='#n76'>76</a>
<a id='n77' href='#n77'>77</a>
<a id='n78' href='#n78'>78</a>
<a id='n79' href='#n79'>79</a>
<a id='n80' href='#n80'>80</a>
<a id='n81' href='#n81'>81</a>
<a id='n82' href='#n82'>82</a>
<a id='n83' href='#n83'>83</a>
<a id='n84' href='#n84'>84</a>
<a id='n85' href='#n85'>85</a>
<a id='n86' href='#n86'>86</a>
<a id='n87' href='#n87'>87</a>
<a id='n88' href='#n88'>88</a>
<a id='n89' href='#n89'>89</a>
<a id='n90' href='#n90'>90</a>
<a id='n91' href='#n91'>91</a>
<a id='n92' href='#n92'>92</a>
<a id='n93' href='#n93'>93</a>
<a id='n94' href='#n94'>94</a>
<a id='n95' href='#n95'>95</a>
<a id='n96' href='#n96'>96</a>
<a id='n97' href='#n97'>97</a>
<a id='n98' href='#n98'>98</a>
<a id='n99' href='#n99'>99</a>
<a id='n100' href='#n100'>100</a>
<a id='n101' href='#n101'>101</a>
<a id='n102' href='#n102'>102</a>
<a id='n103' href='#n103'>103</a>
<a id='n104' href='#n104'>104</a>
<a id='n105' href='#n105'>105</a>
<a id='n106' href='#n106'>106</a>
<a id='n107' href='#n107'>107</a>
<a id='n108' href='#n108'>108</a>
<a id='n109' href='#n109'>109</a>
<a id='n110' href='#n110'>110</a>
<a id='n111' href='#n111'>111</a>
<a id='n112' href='#n112'>112</a>
<a id='n113' href='#n113'>113</a>
<a id='n114' href='#n114'>114</a>
<a id='n115' href='#n115'>115</a>
<a id='n116' href='#n116'>116</a>
<a id='n117' href='#n117'>117</a>
<a id='n118' href='#n118'>118</a>
<a id='n119' href='#n119'>119</a>
<a id='n120' href='#n120'>120</a>
<a id='n121' href='#n121'>121</a>
<a id='n122' href='#n122'>122</a>
<a id='n123' href='#n123'>123</a>
<a id='n124' href='#n124'>124</a>
<a id='n125' href='#n125'>125</a>
<a id='n126' href='#n126'>126</a>
<a id='n127' href='#n127'>127</a>
<a id='n128' href='#n128'>128</a>
<a id='n129' href='#n129'>129</a>
<a id='n130' href='#n130'>130</a>
<a id='n131' href='#n131'>131</a>
<a id='n132' href='#n132'>132</a>
<a id='n133' href='#n133'>133</a>
<a id='n134' href='#n134'>134</a>
<a id='n135' href='#n135'>135</a>
<a id='n136' href='#n136'>136</a>
<a id='n137' href='#n137'>137</a>
<a id='n138' href='#n138'>138</a>
<a id='n139' href='#n139'>139</a>
<a id='n140' href='#n140'>140</a>
<a id='n141' href='#n141'>141</a>
<a id='n142' href='#n142'>142</a>
<a id='n143' href='#n143'>143</a>
<a id='n144' href='#n144'>144</a>
<a id='n145' href='#n145'>145</a>
<a id='n146' href='#n146'>146</a>
<a id='n147' href='#n147'>147</a>
<a id='n148' href='#n148'>148</a>
<a id='n149' href='#n149'>149</a>
<a id='n150' href='#n150'>150</a>
<a id='n151' href='#n151'>151</a>
<a id='n152' href='#n152'>152</a>
<a id='n153' href='#n153'>153</a>
<a id='n154' href='#n154'>154</a>
<a id='n155' href='#n155'>155</a>
<a id='n156' href='#n156'>156</a>
<a id='n157' href='#n157'>157</a>
<a id='n158' href='#n158'>158</a>
<a id='n159' href='#n159'>159</a>
<a id='n160' href='#n160'>160</a>
<a id='n161' href='#n161'>161</a>
<a id='n162' href='#n162'>162</a>
<a id='n163' href='#n163'>163</a>
<a id='n164' href='#n164'>164</a>
<a id='n165' href='#n165'>165</a>
<a id='n166' href='#n166'>166</a>
<a id='n167' href='#n167'>167</a>
<a id='n168' href='#n168'>168</a>
<a id='n169' href='#n169'>169</a>
<a id='n170' href='#n170'>170</a>
<a id='n171' href='#n171'>171</a>
<a id='n172' href='#n172'>172</a>
<a id='n173' href='#n173'>173</a>
<a id='n174' href='#n174'>174</a>
<a id='n175' href='#n175'>175</a>
<a id='n176' href='#n176'>176</a>
<a id='n177' href='#n177'>177</a>
<a id='n178' href='#n178'>178</a>
<a id='n179' href='#n179'>179</a>
<a id='n180' href='#n180'>180</a>
<a id='n181' href='#n181'>181</a>
<a id='n182' href='#n182'>182</a>
<a id='n183' href='#n183'>183</a>
<a id='n184' href='#n184'>184</a>
<a id='n185' href='#n185'>185</a>
<a id='n186' href='#n186'>186</a>
<a id='n187' href='#n187'>187</a>
<a id='n188' href='#n188'>188</a>
<a id='n189' href='#n189'>189</a>
<a id='n190' href='#n190'>190</a>
<a id='n191' href='#n191'>191</a>
<a id='n192' href='#n192'>192</a>
<a id='n193' href='#n193'>193</a>
<a id='n194' href='#n194'>194</a>
<a id='n195' href='#n195'>195</a>
<a id='n196' href='#n196'>196</a>
<a id='n197' href='#n197'>197</a>
<a id='n198' href='#n198'>198</a>
<a id='n199' href='#n199'>199</a>
<a id='n200' href='#n200'>200</a>
<a id='n201' href='#n201'>201</a>
<a id='n202' href='#n202'>202</a>
<a id='n203' href='#n203'>203</a>
<a id='n204' href='#n204'>204</a>
<a id='n205' href='#n205'>205</a>
<a id='n206' href='#n206'>206</a>
<a id='n207' href='#n207'>207</a>
<a id='n208' href='#n208'>208</a>
<a id='n209' href='#n209'>209</a>
<a id='n210' href='#n210'>210</a>
<a id='n211' href='#n211'>211</a>
<a id='n212' href='#n212'>212</a>
<a id='n213' href='#n213'>213</a>
<a id='n214' href='#n214'>214</a>
<a id='n215' href='#n215'>215</a>
<a id='n216' href='#n216'>216</a>
<a id='n217' href='#n217'>217</a>
<a id='n218' href='#n218'>218</a>
<a id='n219' href='#n219'>219</a>
<a id='n220' href='#n220'>220</a>
<a id='n221' href='#n221'>221</a>
<a id='n222' href='#n222'>222</a>
<a id='n223' href='#n223'>223</a>
<a id='n224' href='#n224'>224</a>
<a id='n225' href='#n225'>225</a>
<a id='n226' href='#n226'>226</a>
<a id='n227' href='#n227'>227</a>
<a id='n228' href='#n228'>228</a>
<a id='n229' href='#n229'>229</a>
<a id='n230' href='#n230'>230</a>
<a id='n231' href='#n231'>231</a>
<a id='n232' href='#n232'>232</a>
<a id='n233' href='#n233'>233</a>
<a id='n234' href='#n234'>234</a>
<a id='n235' href='#n235'>235</a>
<a id='n236' href='#n236'>236</a>
<a id='n237' href='#n237'>237</a>
<a id='n238' href='#n238'>238</a>
<a id='n239' href='#n239'>239</a>
<a id='n240' href='#n240'>240</a>
<a id='n241' href='#n241'>241</a>
<a id='n242' href='#n242'>242</a>
<a id='n243' href='#n243'>243</a>
<a id='n244' href='#n244'>244</a>
<a id='n245' href='#n245'>245</a>
<a id='n246' href='#n246'>246</a>
<a id='n247' href='#n247'>247</a>
<a id='n248' href='#n248'>248</a>
<a id='n249' href='#n249'>249</a>
<a id='n250' href='#n250'>250</a>
<a id='n251' href='#n251'>251</a>
<a id='n252' href='#n252'>252</a>
<a id='n253' href='#n253'>253</a>
<a id='n254' href='#n254'>254</a>
<a id='n255' href='#n255'>255</a>
<a id='n256' href='#n256'>256</a>
<a id='n257' href='#n257'>257</a>
<a id='n258' href='#n258'>258</a>
<a id='n259' href='#n259'>259</a>
<a id='n260' href='#n260'>260</a>
<a id='n261' href='#n261'>261</a>
<a id='n262' href='#n262'>262</a>
<a id='n263' href='#n263'>263</a>
<a id='n264' href='#n264'>264</a>
<a id='n265' href='#n265'>265</a>
<a id='n266' href='#n266'>266</a>
<a id='n267' href='#n267'>267</a>
<a id='n268' href='#n268'>268</a>
<a id='n269' href='#n269'>269</a>
<a id='n270' href='#n270'>270</a>
<a id='n271' href='#n271'>271</a>
<a id='n272' href='#n272'>272</a>
<a id='n273' href='#n273'>273</a>
<a id='n274' href='#n274'>274</a>
<a id='n275' href='#n275'>275</a>
<a id='n276' href='#n276'>276</a>
<a id='n277' href='#n277'>277</a>
<a id='n278' href='#n278'>278</a>
<a id='n279' href='#n279'>279</a>
<a id='n280' href='#n280'>280</a>
<a id='n281' href='#n281'>281</a>
<a id='n282' href='#n282'>282</a>
<a id='n283' href='#n283'>283</a>
<a id='n284' href='#n284'>284</a>
<a id='n285' href='#n285'>285</a>
<a id='n286' href='#n286'>286</a>
<a id='n287' href='#n287'>287</a>
<a id='n288' href='#n288'>288</a>
<a id='n289' href='#n289'>289</a>
<a id='n290' href='#n290'>290</a>
<a id='n291' href='#n291'>291</a>
<a id='n292' href='#n292'>292</a>
<a id='n293' href='#n293'>293</a>
<a id='n294' href='#n294'>294</a>
<a id='n295' href='#n295'>295</a>
<a id='n296' href='#n296'>296</a>
<a id='n297' href='#n297'>297</a>
<a id='n298' href='#n298'>298</a>
<a id='n299' href='#n299'>299</a>
<a id='n300' href='#n300'>300</a>
<a id='n301' href='#n301'>301</a>
<a id='n302' href='#n302'>302</a>
<a id='n303' href='#n303'>303</a>
<a id='n304' href='#n304'>304</a>
<a id='n305' href='#n305'>305</a>
<a id='n306' href='#n306'>306</a>
<a id='n307' href='#n307'>307</a>
<a id='n308' href='#n308'>308</a>
<a id='n309' href='#n309'>309</a>
<a id='n310' href='#n310'>310</a>
<a id='n311' href='#n311'>311</a>
<a id='n312' href='#n312'>312</a>
<a id='n313' href='#n313'>313</a>
<a id='n314' href='#n314'>314</a>
<a id='n315' href='#n315'>315</a>
<a id='n316' href='#n316'>316</a>
<a id='n317' href='#n317'>317</a>
<a id='n318' href='#n318'>318</a>
<a id='n319' href='#n319'>319</a>
<a id='n320' href='#n320'>320</a>
<a id='n321' href='#n321'>321</a>
<a id='n322' href='#n322'>322</a>
<a id='n323' href='#n323'>323</a>
<a id='n324' href='#n324'>324</a>
<a id='n325' href='#n325'>325</a>
<a id='n326' href='#n326'>326</a>
<a id='n327' href='#n327'>327</a>
<a id='n328' href='#n328'>328</a>
<a id='n329' href='#n329'>329</a>
<a id='n330' href='#n330'>330</a>
<a id='n331' href='#n331'>331</a>
<a id='n332' href='#n332'>332</a>
<a id='n333' href='#n333'>333</a>
<a id='n334' href='#n334'>334</a>
<a id='n335' href='#n335'>335</a>
<a id='n336' href='#n336'>336</a>
<a id='n337' href='#n337'>337</a>
<a id='n338' href='#n338'>338</a>
<a id='n339' href='#n339'>339</a>
<a id='n340' href='#n340'>340</a>
<a id='n341' href='#n341'>341</a>
<a id='n342' href='#n342'>342</a>
<a id='n343' href='#n343'>343</a>
<a id='n344' href='#n344'>344</a>
<a id='n345' href='#n345'>345</a>
<a id='n346' href='#n346'>346</a>
<a id='n347' href='#n347'>347</a>
<a id='n348' href='#n348'>348</a>
<a id='n349' href='#n349'>349</a>
<a id='n350' href='#n350'>350</a>
<a id='n351' href='#n351'>351</a>
<a id='n352' href='#n352'>352</a>
<a id='n353' href='#n353'>353</a>
<a id='n354' href='#n354'>354</a>
<a id='n355' href='#n355'>355</a>
<a id='n356' href='#n356'>356</a>
<a id='n357' href='#n357'>357</a>
<a id='n358' href='#n358'>358</a>
<a id='n359' href='#n359'>359</a>
<a id='n360' href='#n360'>360</a>
<a id='n361' href='#n361'>361</a>
<a id='n362' href='#n362'>362</a>
<a id='n363' href='#n363'>363</a>
<a id='n364' href='#n364'>364</a>
<a id='n365' href='#n365'>365</a>
<a id='n366' href='#n366'>366</a>
<a id='n367' href='#n367'>367</a>
<a id='n368' href='#n368'>368</a>
<a id='n369' href='#n369'>369</a>
<a id='n370' href='#n370'>370</a>
<a id='n371' href='#n371'>371</a>
<a id='n372' href='#n372'>372</a>
<a id='n373' href='#n373'>373</a>
<a id='n374' href='#n374'>374</a>
<a id='n375' href='#n375'>375</a>
<a id='n376' href='#n376'>376</a>
<a id='n377' href='#n377'>377</a>
<a id='n378' href='#n378'>378</a>
<a id='n379' href='#n379'>379</a>
<a id='n380' href='#n380'>380</a>
<a id='n381' href='#n381'>381</a>
<a id='n382' href='#n382'>382</a>
<a id='n383' href='#n383'>383</a>
<a id='n384' href='#n384'>384</a>
<a id='n385' href='#n385'>385</a>
<a id='n386' href='#n386'>386</a>
<a id='n387' href='#n387'>387</a>
<a id='n388' href='#n388'>388</a>
<a id='n389' href='#n389'>389</a>
<a id='n390' href='#n390'>390</a>
<a id='n391' href='#n391'>391</a>
<a id='n392' href='#n392'>392</a>
<a id='n393' href='#n393'>393</a>
<a id='n394' href='#n394'>394</a>
<a id='n395' href='#n395'>395</a>
<a id='n396' href='#n396'>396</a>
<a id='n397' href='#n397'>397</a>
<a id='n398' href='#n398'>398</a>
<a id='n399' href='#n399'>399</a>
<a id='n400' href='#n400'>400</a>
<a id='n401' href='#n401'>401</a>
<a id='n402' href='#n402'>402</a>
<a id='n403' href='#n403'>403</a>
<a id='n404' href='#n404'>404</a>
<a id='n405' href='#n405'>405</a>
<a id='n406' href='#n406'>406</a>
<a id='n407' href='#n407'>407</a>
<a id='n408' href='#n408'>408</a>
<a id='n409' href='#n409'>409</a>
<a id='n410' href='#n410'>410</a>
<a id='n411' href='#n411'>411</a>
<a id='n412' href='#n412'>412</a>
<a id='n413' href='#n413'>413</a>
<a id='n414' href='#n414'>414</a>
<a id='n415' href='#n415'>415</a>
<a id='n416' href='#n416'>416</a>
<a id='n417' href='#n417'>417</a>
<a id='n418' href='#n418'>418</a>
<a id='n419' href='#n419'>419</a>
<a id='n420' href='#n420'>420</a>
<a id='n421' href='#n421'>421</a>
<a id='n422' href='#n422'>422</a>
<a id='n423' href='#n423'>423</a>
<a id='n424' href='#n424'>424</a>
<a id='n425' href='#n425'>425</a>
<a id='n426' href='#n426'>426</a>
<a id='n427' href='#n427'>427</a>
<a id='n428' href='#n428'>428</a>
<a id='n429' href='#n429'>429</a>
<a id='n430' href='#n430'>430</a>
<a id='n431' href='#n431'>431</a>
<a id='n432' href='#n432'>432</a>
<a id='n433' href='#n433'>433</a>
<a id='n434' href='#n434'>434</a>
<a id='n435' href='#n435'>435</a>
<a id='n436' href='#n436'>436</a>
<a id='n437' href='#n437'>437</a>
<a id='n438' href='#n438'>438</a>
<a id='n439' href='#n439'>439</a>
<a id='n440' href='#n440'>440</a>
<a id='n441' href='#n441'>441</a>
<a id='n442' href='#n442'>442</a>
<a id='n443' href='#n443'>443</a>
<a id='n444' href='#n444'>444</a>
<a id='n445' href='#n445'>445</a>
<a id='n446' href='#n446'>446</a>
<a id='n447' href='#n447'>447</a>
<a id='n448' href='#n448'>448</a>
<a id='n449' href='#n449'>449</a>
<a id='n450' href='#n450'>450</a>
<a id='n451' href='#n451'>451</a>
<a id='n452' href='#n452'>452</a>
<a id='n453' href='#n453'>453</a>
<a id='n454' href='#n454'>454</a>
<a id='n455' href='#n455'>455</a>
<a id='n456' href='#n456'>456</a>
<a id='n457' href='#n457'>457</a>
<a id='n458' href='#n458'>458</a>
<a id='n459' href='#n459'>459</a>
<a id='n460' href='#n460'>460</a>
<a id='n461' href='#n461'>461</a>
<a id='n462' href='#n462'>462</a>
<a id='n463' href='#n463'>463</a>
<a id='n464' href='#n464'>464</a>
<a id='n465' href='#n465'>465</a>
<a id='n466' href='#n466'>466</a>
<a id='n467' href='#n467'>467</a>
<a id='n468' href='#n468'>468</a>
<a id='n469' href='#n469'>469</a>
<a id='n470' href='#n470'>470</a>
<a id='n471' href='#n471'>471</a>
<a id='n472' href='#n472'>472</a>
<a id='n473' href='#n473'>473</a>
<a id='n474' href='#n474'>474</a>
<a id='n475' href='#n475'>475</a>
<a id='n476' href='#n476'>476</a>
<a id='n477' href='#n477'>477</a>
<a id='n478' href='#n478'>478</a>
<a id='n479' href='#n479'>479</a>
<a id='n480' href='#n480'>480</a>
<a id='n481' href='#n481'>481</a>
<a id='n482' href='#n482'>482</a>
<a id='n483' href='#n483'>483</a>
<a id='n484' href='#n484'>484</a>
<a id='n485' href='#n485'>485</a>
<a id='n486' href='#n486'>486</a>
<a id='n487' href='#n487'>487</a>
<a id='n488' href='#n488'>488</a>
<a id='n489' href='#n489'>489</a>
<a id='n490' href='#n490'>490</a>
<a id='n491' href='#n491'>491</a>
<a id='n492' href='#n492'>492</a>
<a id='n493' href='#n493'>493</a>
<a id='n494' href='#n494'>494</a>
<a id='n495' href='#n495'>495</a>
<a id='n496' href='#n496'>496</a>
<a id='n497' href='#n497'>497</a>
<a id='n498' href='#n498'>498</a>
<a id='n499' href='#n499'>499</a>
<a id='n500' href='#n500'>500</a>
<a id='n501' href='#n501'>501</a>
<a id='n502' href='#n502'>502</a>
<a id='n503' href='#n503'>503</a>
<a id='n504' href='#n504'>504</a>
<a id='n505' href='#n505'>505</a>
<a id='n506' href='#n506'>506</a>
<a id='n507' href='#n507'>507</a>
<a id='n508' href='#n508'>508</a>
<a id='n509' href='#n509'>509</a>
<a id='n510' href='#n510'>510</a>
<a id='n511' href='#n511'>511</a>
<a id='n512' href='#n512'>512</a>
<a id='n513' href='#n513'>513</a>
<a id='n514' href='#n514'>514</a>
<a id='n515' href='#n515'>515</a>
<a id='n516' href='#n516'>516</a>
<a id='n517' href='#n517'>517</a>
<a id='n518' href='#n518'>518</a>
<a id='n519' href='#n519'>519</a>
<a id='n520' href='#n520'>520</a>
<a id='n521' href='#n521'>521</a>
<a id='n522' href='#n522'>522</a>
<a id='n523' href='#n523'>523</a>
<a id='n524' href='#n524'>524</a>
<a id='n525' href='#n525'>525</a>
<a id='n526' href='#n526'>526</a>
<a id='n527' href='#n527'>527</a>
<a id='n528' href='#n528'>528</a>
<a id='n529' href='#n529'>529</a>
<a id='n530' href='#n530'>530</a>
<a id='n531' href='#n531'>531</a>
<a id='n532' href='#n532'>532</a>
<a id='n533' href='#n533'>533</a>
<a id='n534' href='#n534'>534</a>
<a id='n535' href='#n535'>535</a>
<a id='n536' href='#n536'>536</a>
<a id='n537' href='#n537'>537</a>
<a id='n538' href='#n538'>538</a>
<a id='n539' href='#n539'>539</a>
<a id='n540' href='#n540'>540</a>
<a id='n541' href='#n541'>541</a>
<a id='n542' href='#n542'>542</a>
<a id='n543' href='#n543'>543</a>
<a id='n544' href='#n544'>544</a>
<a id='n545' href='#n545'>545</a>
<a id='n546' href='#n546'>546</a>
<a id='n547' href='#n547'>547</a>
<a id='n548' href='#n548'>548</a>
<a id='n549' href='#n549'>549</a>
<a id='n550' href='#n550'>550</a>
<a id='n551' href='#n551'>551</a>
<a id='n552' href='#n552'>552</a>
<a id='n553' href='#n553'>553</a>
<a id='n554' href='#n554'>554</a>
<a id='n555' href='#n555'>555</a>
<a id='n556' href='#n556'>556</a>
<a id='n557' href='#n557'>557</a>
<a id='n558' href='#n558'>558</a>
<a id='n559' href='#n559'>559</a>
<a id='n560' href='#n560'>560</a>
<a id='n561' href='#n561'>561</a>
<a id='n562' href='#n562'>562</a>
<a id='n563' href='#n563'>563</a>
<a id='n564' href='#n564'>564</a>
<a id='n565' href='#n565'>565</a>
<a id='n566' href='#n566'>566</a>
<a id='n567' href='#n567'>567</a>
<a id='n568' href='#n568'>568</a>
<a id='n569' href='#n569'>569</a>
<a id='n570' href='#n570'>570</a>
<a id='n571' href='#n571'>571</a>
<a id='n572' href='#n572'>572</a>
<a id='n573' href='#n573'>573</a>
<a id='n574' href='#n574'>574</a>
<a id='n575' href='#n575'>575</a>
<a id='n576' href='#n576'>576</a>
<a id='n577' href='#n577'>577</a>
<a id='n578' href='#n578'>578</a>
<a id='n579' href='#n579'>579</a>
<a id='n580' href='#n580'>580</a>
<a id='n581' href='#n581'>581</a>
<a id='n582' href='#n582'>582</a>
<a id='n583' href='#n583'>583</a>
<a id='n584' href='#n584'>584</a>
<a id='n585' href='#n585'>585</a>
<a id='n586' href='#n586'>586</a>
<a id='n587' href='#n587'>587</a>
<a id='n588' href='#n588'>588</a>
<a id='n589' href='#n589'>589</a>
<a id='n590' href='#n590'>590</a>
<a id='n591' href='#n591'>591</a>
<a id='n592' href='#n592'>592</a>
<a id='n593' href='#n593'>593</a>
<a id='n594' href='#n594'>594</a>
<a id='n595' href='#n595'>595</a>
<a id='n596' href='#n596'>596</a>
<a id='n597' href='#n597'>597</a>
<a id='n598' href='#n598'>598</a>
<a id='n599' href='#n599'>599</a>
<a id='n600' href='#n600'>600</a>
<a id='n601' href='#n601'>601</a>
<a id='n602' href='#n602'>602</a>
<a id='n603' href='#n603'>603</a>
<a id='n604' href='#n604'>604</a>
<a id='n605' href='#n605'>605</a>
<a id='n606' href='#n606'>606</a>
<a id='n607' href='#n607'>607</a>
<a id='n608' href='#n608'>608</a>
<a id='n609' href='#n609'>609</a>
<a id='n610' href='#n610'>610</a>
<a id='n611' href='#n611'>611</a>
<a id='n612' href='#n612'>612</a>
<a id='n613' href='#n613'>613</a>
<a id='n614' href='#n614'>614</a>
<a id='n615' href='#n615'>615</a>
<a id='n616' href='#n616'>616</a>
</pre></td>
<td class='lines'><pre><code><style>pre { line-height: 125%; margin: 0; }
td.linenos pre { color: #000000; background-color: #f0f0f0; padding: 0 5px 0 5px; }
span.linenos { color: #000000; background-color: #f0f0f0; padding: 0 5px 0 5px; }
td.linenos pre.special { color: #000000; background-color: #ffffc0; padding: 0 5px 0 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding: 0 5px 0 5px; }
.highlight .hll { background-color: #ffffcc }
.highlight { background: #ffffff; }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .gr { color: #aa0000 } /* Generic.Error */
.highlight .gh { color: #333333 } /* Generic.Heading */
.highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #555555 } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #666666 } /* Generic.Subheading */
.highlight .gt { color: #aa0000 } /* Generic.Traceback */
.highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
.highlight .no { color: #003366; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #555555 } /* Name.Decorator */
.highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */
.highlight .nl { color: #336699; font-style: italic } /* Name.Label */
.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
.highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */
.highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */
.highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */
.highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */
.highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */
.highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */
.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
.highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */
.highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */
.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */</style><div class="highlight"><pre><span></span>From eee16330c9de9adf7880cce9f1d32e13f89706bb Mon Sep 17 00:00:00 2001
From: Wu Zhangjin <wuzhangjin@gmail.com>
Date: Tue, 11 Jan 2011 13:16:47 +0000
Subject: MIPS: Add crash and kdump support
From: http://patchwork.linux-mips.org/patch/1025/
Hello folks,
Please find here MIPS crash and kdump patches.
This is patch set of 3 patches:
1. generic MIPS changes (kernel);
2. MIPS Cavium Octeon board kexec/kdump code (kernel);
3. Kexec user space MIPS changes.
Patches were tested on the latest linux-mips@ git kernel and the latest
kexec-tools git on Cavium Octeon 50xx board.
I also made the same code working on RMI XLR/XLS boards for both
mips32 and mips64 kernels.
Best regards,
Maxim Uvarov.
<span class="gd">------</span>
[ Zhangjin: Several trivial building failure has been fixed.
Note: the 2nd patch can not be cleanly applied, but may be a good
reference for the other board development:
+ MIPS Cavium Octeon board kexec,kdump support
http://patchwork.linux-mips.org/patch/1026/
And the 3rd patch has already been merged into the mainline kexec-tools:
+ some kexec MIPS improvements
http://patchwork.linux-mips.org/patch/1027/
kexec-tools is available here:
+ http://horms.net/projects/kexec/
git://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git
]
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
<span class="gd">---</span>
(limited to 'arch/mips/kernel')
<span class="gd">--- a/arch/mips/kernel/Makefile</span>
<span class="gi">+++ b/arch/mips/kernel/Makefile</span>
<span class="gu">@@ -93,7 +93,8 @@ obj-$(CONFIG_I8253) += i8253.o</span>
obj-$(CONFIG_GPIO_TXX9) += gpio_txx9.o
<span class="gd">-obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o</span>
<span class="gi">+obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o crash.o</span>
<span class="gi">+obj-$(CONFIG_CRASH_DUMP) += crash_dump.o</span>
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_SPINLOCK_TEST) += spinlock_test.o
obj-$(CONFIG_MIPS_MACHINE) += mips_machine.o
<span class="gd">--- /dev/null</span>
<span class="gi">+++ b/arch/mips/kernel/crash.c</span>
<span class="gu">@@ -0,0 +1,75 @@</span>
<span class="gi">+#include <linux/kernel.h></span>
<span class="gi">+#include <linux/smp.h></span>
<span class="gi">+#include <linux/reboot.h></span>
<span class="gi">+#include <linux/kexec.h></span>
<span class="gi">+#include <linux/bootmem.h></span>
<span class="gi">+#include <linux/crash_dump.h></span>
<span class="gi">+#include <linux/delay.h></span>
<span class="gi">+#include <linux/init.h></span>
<span class="gi">+#include <linux/irq.h></span>
<span class="gi">+#include <linux/types.h></span>
<span class="gi">+#include <linux/sched.h></span>
<span class="gi">+</span>
<span class="gi">+#ifdef CONFIG_CRASH_DUMP</span>
<span class="gi">+unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;</span>
<span class="gi">+#endif</span>
<span class="gi">+</span>
<span class="gi">+/* This keeps a track of which one is crashing cpu. */</span>
<span class="gi">+int crashing_cpu = -1;</span>
<span class="gi">+static cpumask_t cpus_in_crash = CPU_MASK_NONE;</span>
<span class="gi">+</span>
<span class="gi">+#ifdef CONFIG_SMP</span>
<span class="gi">+void crash_shutdown_secondary(void *ignore)</span>
<span class="gi">+{</span>
<span class="gi">+ struct pt_regs *regs;</span>
<span class="gi">+ int cpu = smp_processor_id();</span>
<span class="gi">+</span>
<span class="gi">+ regs = task_pt_regs(current);</span>
<span class="gi">+</span>
<span class="gi">+ if (!cpu_online(cpu))</span>
<span class="gi">+ return;</span>
<span class="gi">+</span>
<span class="gi">+ local_irq_disable();</span>
<span class="gi">+ if (!cpu_isset(cpu, cpus_in_crash))</span>
<span class="gi">+ crash_save_cpu(regs, cpu);</span>
<span class="gi">+ cpu_set(cpu, cpus_in_crash);</span>
<span class="gi">+</span>
<span class="gi">+ while (!atomic_read(&kexec_ready_to_reboot))</span>
<span class="gi">+ cpu_relax();</span>
<span class="gi">+ relocated_kexec_smp_wait(NULL);</span>
<span class="gi">+ /* NOTREACHED */</span>
<span class="gi">+}</span>
<span class="gi">+</span>
<span class="gi">+static void crash_kexec_prepare_cpus(void)</span>
<span class="gi">+{</span>
<span class="gi">+ unsigned int msecs;</span>
<span class="gi">+</span>
<span class="gi">+ unsigned int ncpus = num_online_cpus() - 1;/* Excluding the panic cpu */</span>
<span class="gi">+</span>
<span class="gi">+ dump_send_ipi(crash_shutdown_secondary);</span>
<span class="gi">+ smp_wmb();</span>
<span class="gi">+</span>
<span class="gi">+ /*</span>
<span class="gi">+ * The crash CPU sends an IPI and wait for other CPUs to</span>
<span class="gi">+ * respond. Delay of at least 10 seconds.</span>
<span class="gi">+ */</span>
<span class="gi">+ printk(KERN_EMERG "Sending IPI to other cpus...\n");</span>
<span class="gi">+ msecs = 10000;</span>
<span class="gi">+ while ((cpus_weight(cpus_in_crash) < ncpus) && (--msecs > 0)) {</span>
<span class="gi">+ cpu_relax();</span>
<span class="gi">+ mdelay(1);</span>
<span class="gi">+ }</span>
<span class="gi">+}</span>
<span class="gi">+</span>
<span class="gi">+#else</span>
<span class="gi">+static void crash_kexec_prepare_cpus(void) {}</span>
<span class="gi">+#endif</span>
<span class="gi">+</span>
<span class="gi">+void default_machine_crash_shutdown(struct pt_regs *regs)</span>
<span class="gi">+{</span>
<span class="gi">+ local_irq_disable();</span>
<span class="gi">+ crashing_cpu = smp_processor_id();</span>
<span class="gi">+ crash_save_cpu(regs, crashing_cpu);</span>
<span class="gi">+ crash_kexec_prepare_cpus();</span>
<span class="gi">+ cpu_set(crashing_cpu, cpus_in_crash);</span>
<span class="gi">+}</span>
<span class="gd">--- /dev/null</span>
<span class="gi">+++ b/arch/mips/kernel/crash_dump.c</span>
<span class="gu">@@ -0,0 +1,86 @@</span>
<span class="gi">+#include <linux/highmem.h></span>
<span class="gi">+#include <linux/bootmem.h></span>
<span class="gi">+#include <linux/crash_dump.h></span>
<span class="gi">+#include <asm/uaccess.h></span>
<span class="gi">+</span>
<span class="gi">+#ifdef CONFIG_PROC_VMCORE</span>
<span class="gi">+static int __init parse_elfcorehdr(char *p)</span>
<span class="gi">+{</span>
<span class="gi">+ if (p)</span>
<span class="gi">+ elfcorehdr_addr = memparse(p, &p);</span>
<span class="gi">+ return 1;</span>
<span class="gi">+}</span>
<span class="gi">+__setup("elfcorehdr=", parse_elfcorehdr);</span>
<span class="gi">+#endif</span>
<span class="gi">+</span>
<span class="gi">+static int __init parse_savemaxmem(char *p)</span>
<span class="gi">+{</span>
<span class="gi">+ if (p)</span>
<span class="gi">+ saved_max_pfn = (memparse(p, &p) >> PAGE_SHIFT) - 1;</span>
<span class="gi">+</span>
<span class="gi">+ return 1;</span>
<span class="gi">+}</span>
<span class="gi">+__setup("savemaxmem=", parse_savemaxmem);</span>
<span class="gi">+</span>
<span class="gi">+</span>
<span class="gi">+static void *kdump_buf_page;</span>
<span class="gi">+</span>
<span class="gi">+/**</span>
<span class="gi">+ * copy_oldmem_page - copy one page from "oldmem"</span>
<span class="gi">+ * @pfn: page frame number to be copied</span>
<span class="gi">+ * @buf: target memory address for the copy; this can be in kernel address</span>
<span class="gi">+ * space or user address space (see @userbuf)</span>
<span class="gi">+ * @csize: number of bytes to copy</span>
<span class="gi">+ * @offset: offset in bytes into the page (based on pfn) to begin the copy</span>
<span class="gi">+ * @userbuf: if set, @buf is in user address space, use copy_to_user(),</span>
<span class="gi">+ * otherwise @buf is in kernel address space, use memcpy().</span>
<span class="gi">+ *</span>
<span class="gi">+ * Copy a page from "oldmem". For this page, there is no pte mapped</span>
<span class="gi">+ * in the current kernel.</span>
<span class="gi">+ *</span>
<span class="gi">+ * Calling copy_to_user() in atomic context is not desirable. Hence first</span>
<span class="gi">+ * copying the data to a pre-allocated kernel page and then copying to user</span>
<span class="gi">+ * space in non-atomic context.</span>
<span class="gi">+ */</span>
<span class="gi">+ssize_t copy_oldmem_page(unsigned long pfn, char *buf,</span>
<span class="gi">+ size_t csize, unsigned long offset, int userbuf)</span>
<span class="gi">+{</span>
<span class="gi">+ void *vaddr;</span>
<span class="gi">+</span>
<span class="gi">+ if (!csize)</span>
<span class="gi">+ return 0;</span>
<span class="gi">+</span>
<span class="gi">+ vaddr = kmap_atomic_pfn(pfn, KM_PTE0);</span>
<span class="gi">+</span>
<span class="gi">+ if (!userbuf) {</span>
<span class="gi">+ memcpy(buf, (vaddr + offset), csize);</span>
<span class="gi">+ kunmap_atomic(vaddr, KM_PTE0);</span>
<span class="gi">+ } else {</span>
<span class="gi">+ if (!kdump_buf_page) {</span>
<span class="gi">+ printk(KERN_WARNING "Kdump: Kdump buffer page not"</span>
<span class="gi">+ " allocated\n");</span>
<span class="gi">+ return -EFAULT;</span>
<span class="gi">+ }</span>
<span class="gi">+ copy_page(kdump_buf_page, vaddr);</span>
<span class="gi">+ kunmap_atomic(vaddr, KM_PTE0);</span>
<span class="gi">+ if (copy_to_user(buf, (kdump_buf_page + offset), csize))</span>
<span class="gi">+ return -EFAULT;</span>
<span class="gi">+ }</span>
<span class="gi">+</span>
<span class="gi">+ return csize;</span>
<span class="gi">+}</span>
<span class="gi">+</span>
<span class="gi">+static int __init kdump_buf_page_init(void)</span>
<span class="gi">+{</span>
<span class="gi">+ int ret = 0;</span>
<span class="gi">+</span>
<span class="gi">+ kdump_buf_page = kmalloc(PAGE_SIZE, GFP_KERNEL);</span>
<span class="gi">+ if (!kdump_buf_page) {</span>
<span class="gi">+ printk(KERN_WARNING "Kdump: Failed to allocate kdump buffer"</span>
<span class="gi">+ " page\n");</span>
<span class="gi">+ ret = -ENOMEM;</span>
<span class="gi">+ }</span>
<span class="gi">+</span>
<span class="gi">+ return ret;</span>
<span class="gi">+}</span>
<span class="gi">+arch_initcall(kdump_buf_page_init);</span>
<span class="gd">--- a/arch/mips/kernel/machine_kexec.c</span>
<span class="gi">+++ b/arch/mips/kernel/machine_kexec.c</span>
<span class="gu">@@ -19,9 +19,19 @@ extern const size_t relocate_new_kernel_</span>
extern unsigned long kexec_start_address;
extern unsigned long kexec_indirection_page;
<span class="gi">+int (*_machine_kexec_prepare)(struct kimage *) = NULL;</span>
<span class="gi">+void (*_machine_kexec_shutdown)(void) = NULL;</span>
<span class="gi">+void (*_machine_crash_shutdown)(struct pt_regs *regs) = NULL;</span>
<span class="gi">+#ifdef CONFIG_SMP</span>
<span class="gi">+void (*relocated_kexec_smp_wait) (void *);</span>
<span class="gi">+atomic_t kexec_ready_to_reboot = ATOMIC_INIT(0);</span>
<span class="gi">+#endif</span>
<span class="gi">+</span>
int
machine_kexec_prepare(struct kimage *kimage)
{
<span class="gi">+ if (_machine_kexec_prepare)</span>
<span class="gi">+ return _machine_kexec_prepare(kimage);</span>
return 0;
}
<span class="gu">@@ -33,11 +43,17 @@ machine_kexec_cleanup(struct kimage *kim</span>
void
machine_shutdown(void)
{
<span class="gi">+ if (_machine_kexec_shutdown)</span>
<span class="gi">+ _machine_kexec_shutdown();</span>
}
void
machine_crash_shutdown(struct pt_regs *regs)
{
<span class="gi">+ if (_machine_crash_shutdown)</span>
<span class="gi">+ _machine_crash_shutdown(regs);</span>
<span class="gi">+ else</span>
<span class="gi">+ default_machine_crash_shutdown(regs);</span>
}
typedef void (*noretfun_t)(void) __attribute__((noreturn));
<span class="gu">@@ -52,7 +68,9 @@ machine_kexec(struct kimage *image)</span>
reboot_code_buffer =
(unsigned long)page_address(image->control_code_page);
<span class="gd">- kexec_start_address = (unsigned long) phys_to_virt(image->start);</span>
<span class="gi">+ kexec_start_address =</span>
<span class="gi">+ (unsigned long) phys_to_virt(image->start);</span>
<span class="gi">+</span>
kexec_indirection_page =
(unsigned long) phys_to_virt(image->head & PAGE_MASK);
<span class="gu">@@ -63,7 +81,7 @@ machine_kexec(struct kimage *image)</span>
* The generic kexec code builds a page list with physical
* addresses. they are directly accessible through KSEG0 (or
* CKSEG0 or XPHYS if on 64bit system), hence the
<span class="gd">- * pys_to_virt() call.</span>
<span class="gi">+ * phys_to_virt() call.</span>
*/
for (ptr = &image->head; (entry = *ptr) && !(entry &IND_DONE);
ptr = (entry & IND_INDIRECTION) ?
<span class="gu">@@ -81,5 +99,13 @@ machine_kexec(struct kimage *image)</span>
printk("Will call new kernel at %08lx\n", image->start);
printk("Bye ...\n");
__flush_cache_all();
<span class="gi">+#ifdef CONFIG_SMP</span>
<span class="gi">+ /* All secondary cpus now may jump to kexec_wait cycle */</span>
<span class="gi">+ relocated_kexec_smp_wait = reboot_code_buffer +</span>
<span class="gi">+ (void *)(kexec_smp_wait - relocate_new_kernel);</span>
<span class="gi">+ smp_wmb();</span>
<span class="gi">+ atomic_set(&kexec_ready_to_reboot, 1);</span>
<span class="gi">+#endif</span>
((noretfun_t) reboot_code_buffer)();
}
<span class="gi">+</span>
<span class="gd">--- a/arch/mips/kernel/relocate_kernel.S</span>
<span class="gi">+++ b/arch/mips/kernel/relocate_kernel.S</span>
<span class="gu">@@ -15,6 +15,11 @@</span>
#include <asm/addrspace.h>
LEAF(relocate_new_kernel)
<span class="gi">+ PTR_L a0, arg0</span>
<span class="gi">+ PTR_L a1, arg1</span>
<span class="gi">+ PTR_L a2, arg2</span>
<span class="gi">+ PTR_L a3, arg3</span>
<span class="gi">+</span>
PTR_L s0, kexec_indirection_page
PTR_L s1, kexec_start_address
<span class="gu">@@ -26,7 +31,6 @@ process_entry:</span>
and s3, s2, 0x1
beq s3, zero, 1f
and s4, s2, ~0x1 /* store destination addr in s4 */
<span class="gd">- move a0, s4</span>
b process_entry
1:
<span class="gu">@@ -60,23 +64,100 @@ copy_word:</span>
b process_entry
done:
<span class="gi">+#ifdef CONFIG_SMP</span>
<span class="gi">+ /* kexec_flag reset is signal to other CPUs what kernel</span>
<span class="gi">+ was moved to it's location. Note - we need relocated address</span>
<span class="gi">+ of kexec_flag. */</span>
<span class="gi">+</span>
<span class="gi">+ bal 1f</span>
<span class="gi">+ 1: move t1,ra;</span>
<span class="gi">+ PTR_LA t2,1b</span>
<span class="gi">+ PTR_LA t0,kexec_flag</span>
<span class="gi">+ PTR_SUB t0,t0,t2;</span>
<span class="gi">+ PTR_ADD t0,t1,t0;</span>
<span class="gi">+ LONG_S zero,(t0)</span>
<span class="gi">+#endif</span>
<span class="gi">+</span>
<span class="gi">+ sync</span>
/* jump to kexec_start_address */
j s1
END(relocate_new_kernel)
<span class="gd">-kexec_start_address:</span>
<span class="gd">- EXPORT(kexec_start_address)</span>
<span class="gi">+#ifdef CONFIG_SMP</span>
<span class="gi">+/*</span>
<span class="gi">+ * Other CPUs should wait until code is relocated and</span>
<span class="gi">+ * then start at entry (?) point.</span>
<span class="gi">+ */</span>
<span class="gi">+LEAF(kexec_smp_wait)</span>
<span class="gi">+ PTR_L a0, s_arg0</span>
<span class="gi">+ PTR_L a1, s_arg1</span>
<span class="gi">+ PTR_L a2, s_arg2</span>
<span class="gi">+ PTR_L a3, s_arg3</span>
<span class="gi">+ PTR_L s1, kexec_start_address</span>
<span class="gi">+</span>
<span class="gi">+ /* Non-relocated address works for args and kexec_start_address ( old</span>
<span class="gi">+ * kernel is not overwritten). But we need relocated address of</span>
<span class="gi">+ * kexec_flag.</span>
<span class="gi">+ */</span>
<span class="gi">+</span>
<span class="gi">+ bal 1f</span>
<span class="gi">+1: move t1,ra;</span>
<span class="gi">+ PTR_LA t2,1b</span>
<span class="gi">+ PTR_LA t0,kexec_flag</span>
<span class="gi">+ PTR_SUB t0,t0,t2;</span>
<span class="gi">+ PTR_ADD t0,t1,t0;</span>
<span class="gi">+</span>
<span class="gi">+1: LONG_L s0, (t0)</span>
<span class="gi">+ bne s0, zero,1b</span>
<span class="gi">+</span>
<span class="gi">+ sync</span>
<span class="gi">+ j s1</span>
<span class="gi">+ END(kexec_smp_wait)</span>
<span class="gi">+#endif</span>
<span class="gi">+</span>
<span class="gi">+#ifdef __mips64</span>
<span class="gi">+ /* all PTR's must be aligned to 8 byte in 64-bit mode */</span>
<span class="gi">+ .align 3</span>
<span class="gi">+#endif</span>
<span class="gi">+</span>
<span class="gi">+/* All parameters to new kernel are passed in registers a0-a3.</span>
<span class="gi">+ * kexec_args[0..3] are uses to prepare register values.</span>
<span class="gi">+ */</span>
<span class="gi">+</span>
<span class="gi">+EXPORT(kexec_args)</span>
<span class="gi">+arg0: PTR 0x0</span>
<span class="gi">+arg1: PTR 0x0</span>
<span class="gi">+arg2: PTR 0x0</span>
<span class="gi">+arg3: PTR 0x0</span>
<span class="gi">+ .size kexec_args,PTRSIZE*4</span>
<span class="gi">+</span>
<span class="gi">+#ifdef CONFIG_SMP</span>
<span class="gi">+/*</span>
<span class="gi">+ * Secondary CPUs may have different kernel parameters in</span>
<span class="gi">+ * their registers a0-a3. secondary_kexec_args[0..3] are used</span>
<span class="gi">+ * to prepare register values.</span>
<span class="gi">+ */</span>
<span class="gi">+EXPORT(secondary_kexec_args)</span>
<span class="gi">+s_arg0: PTR 0x0</span>
<span class="gi">+s_arg1: PTR 0x0</span>
<span class="gi">+s_arg2: PTR 0x0</span>
<span class="gi">+s_arg3: PTR 0x0</span>
<span class="gi">+ .size secondary_kexec_args,PTRSIZE*4</span>
<span class="gi">+kexec_flag:</span>
<span class="gi">+ LONG 0x1</span>
<span class="gi">+</span>
<span class="gi">+#endif</span>
<span class="gi">+</span>
<span class="gi">+EXPORT(kexec_start_address)</span>
PTR 0x0
.size kexec_start_address, PTRSIZE
<span class="gd">-kexec_indirection_page:</span>
<span class="gd">- EXPORT(kexec_indirection_page)</span>
<span class="gi">+EXPORT(kexec_indirection_page)</span>
PTR 0
.size kexec_indirection_page, PTRSIZE
relocate_new_kernel_end:
<span class="gd">-relocate_new_kernel_size:</span>
<span class="gd">- EXPORT(relocate_new_kernel_size)</span>
<span class="gi">+EXPORT(relocate_new_kernel_size)</span>
PTR relocate_new_kernel_end - relocate_new_kernel
.size relocate_new_kernel_size, PTRSIZE
<span class="gd">--- a/arch/mips/kernel/setup.c</span>
<span class="gi">+++ b/arch/mips/kernel/setup.c</span>
<span class="gu">@@ -21,6 +21,7 @@</span>
#include <linux/console.h>
#include <linux/pfn.h>
#include <linux/debugfs.h>
<span class="gi">+#include <linux/kexec.h></span>
#include <asm/addrspace.h>
#include <asm/bootinfo.h>
<span class="gu">@@ -488,12 +489,62 @@ static void __init arch_mem_init(char **</span>
}
bootmem_init();
<span class="gi">+#ifdef CONFIG_KEXEC</span>
<span class="gi">+ if (crashk_res.start != crashk_res.end)</span>
<span class="gi">+ reserve_bootmem(crashk_res.start,</span>
<span class="gi">+ crashk_res.end - crashk_res.start + 1,</span>
<span class="gi">+ BOOTMEM_DEFAULT);</span>
<span class="gi">+#endif</span>
device_tree_init();
sparse_init();
plat_swiotlb_setup();
paging_init();
}
<span class="gi">+#ifdef CONFIG_KEXEC</span>
<span class="gi">+static inline unsigned long long get_total_mem(void)</span>
<span class="gi">+{</span>
<span class="gi">+ unsigned long long total;</span>
<span class="gi">+ total = max_pfn - min_low_pfn;</span>
<span class="gi">+ return total << PAGE_SHIFT;</span>
<span class="gi">+}</span>
<span class="gi">+</span>
<span class="gi">+static void __init mips_parse_crashkernel(void)</span>
<span class="gi">+{</span>
<span class="gi">+ unsigned long long total_mem;</span>
<span class="gi">+ unsigned long long crash_size, crash_base;</span>
<span class="gi">+ int ret;</span>
<span class="gi">+</span>
<span class="gi">+ total_mem = get_total_mem();</span>
<span class="gi">+ ret = parse_crashkernel(boot_command_line, total_mem,</span>
<span class="gi">+ &crash_size, &crash_base);</span>
<span class="gi">+ if (ret != 0 || crash_size <= 0)</span>
<span class="gi">+ return;</span>
<span class="gi">+</span>
<span class="gi">+ crashk_res.start = crash_base;</span>
<span class="gi">+ crashk_res.end = crash_base + crash_size - 1;</span>
<span class="gi">+}</span>
<span class="gi">+static void __init request_crashkernel(struct resource *res)</span>
<span class="gi">+{</span>
<span class="gi">+ int ret;</span>
<span class="gi">+</span>
<span class="gi">+ ret = request_resource(res, &crashk_res);</span>
<span class="gi">+ if (!ret)</span>
<span class="gi">+ printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "</span>
<span class="gi">+ "for crashkernel\n",</span>
<span class="gi">+ (unsigned long)((crashk_res.end -</span>
<span class="gi">+ crashk_res.start + 1) >> 20),</span>
<span class="gi">+ (unsigned long)(crashk_res.start >> 20));</span>
<span class="gi">+}</span>
<span class="gi">+#else</span>
<span class="gi">+static void __init mips_parse_crashkernel(void)</span>
<span class="gi">+{</span>
<span class="gi">+}</span>
<span class="gi">+static void __init request_crashkernel(struct resource *res)</span>
<span class="gi">+{</span>
<span class="gi">+}</span>
<span class="gi">+#endif</span>
<span class="gi">+</span>
static void __init resource_init(void)
{
int i;
<span class="gu">@@ -509,6 +560,8 @@ static void __init resource_init(void)</span>
/*
* Request address space for all standard RAM.
*/
<span class="gi">+ mips_parse_crashkernel();</span>
<span class="gi">+</span>
for (i = 0; i < boot_mem_map.nr_map; i++) {
struct resource *res;
unsigned long start, end;
<span class="gu">@@ -544,6 +597,7 @@ static void __init resource_init(void)</span>
*/
request_resource(res, &code_resource);
request_resource(res, &data_resource);
<span class="gi">+ request_crashkernel(res);</span>
}
}
<span class="gd">--- a/arch/mips/kernel/smp.c</span>
<span class="gi">+++ b/arch/mips/kernel/smp.c</span>
<span class="gu">@@ -433,3 +433,21 @@ void flush_tlb_one(unsigned long vaddr)</span>
EXPORT_SYMBOL(flush_tlb_page);
EXPORT_SYMBOL(flush_tlb_one);
<span class="gi">+</span>
<span class="gi">+#if defined(CONFIG_KEXEC)</span>
<span class="gi">+void (*dump_ipi_function_ptr)(void *) = NULL;</span>
<span class="gi">+void dump_send_ipi(void (*dump_ipi_callback)(void *))</span>
<span class="gi">+{</span>
<span class="gi">+ int i;</span>
<span class="gi">+ int cpu = smp_processor_id();</span>
<span class="gi">+</span>
<span class="gi">+ dump_ipi_function_ptr = dump_ipi_callback;</span>
<span class="gi">+ smp_mb();</span>
<span class="gi">+ for_each_online_cpu(i)</span>
<span class="gi">+ if (i != cpu)</span>
<span class="gi">+ core_send_ipi(i, SMP_DUMP);</span>
<span class="gi">+</span>
<span class="gi">+}</span>
<span class="gi">+EXPORT_SYMBOL(dump_send_ipi);</span>
<span class="gi">+#endif</span>
<span class="gi">+</span>
<span class="gd">--- a/arch/mips/include/asm/kexec.h</span>
<span class="gi">+++ b/arch/mips/include/asm/kexec.h</span>
<span class="gu">@@ -9,22 +9,45 @@</span>
#ifndef _MIPS_KEXEC
# define _MIPS_KEXEC
<span class="gi">+#include <asm/stacktrace.h></span>
<span class="gi">+</span>
<span class="gi">+extern unsigned long long elfcorehdr_addr;</span>
<span class="gi">+</span>
/* Maximum physical address we can use pages from */
#define KEXEC_SOURCE_MEMORY_LIMIT (0x20000000)
/* Maximum address we can reach in physical address mode */
#define KEXEC_DESTINATION_MEMORY_LIMIT (0x20000000)
/* Maximum address we can use for the control code buffer */
#define KEXEC_CONTROL_MEMORY_LIMIT (0x20000000)
<span class="gd">-</span>
<span class="gd">-#define KEXEC_CONTROL_PAGE_SIZE 4096</span>
<span class="gi">+/* Reserve 3*4096 bytes for board-specific info */</span>
<span class="gi">+#define KEXEC_CONTROL_PAGE_SIZE (4096 + 3*4096)</span>
/* The native architecture */
#define KEXEC_ARCH KEXEC_ARCH_MIPS
<span class="gi">+#define MAX_NOTE_BYTES 1024</span>
static inline void crash_setup_regs(struct pt_regs *newregs,
<span class="gd">- struct pt_regs *oldregs)</span>
<span class="gi">+ struct pt_regs *oldregs)</span>
{
<span class="gd">- /* Dummy implementation for now */</span>
<span class="gi">+ if (oldregs)</span>
<span class="gi">+ memcpy(newregs, oldregs, sizeof(*newregs));</span>
<span class="gi">+ else</span>
<span class="gi">+ prepare_frametrace(newregs);</span>
}
<span class="gi">+#ifdef CONFIG_KEXEC</span>
<span class="gi">+struct kimage;</span>
<span class="gi">+extern unsigned long kexec_args[4];</span>
<span class="gi">+extern int (*_machine_kexec_prepare)(struct kimage *);</span>
<span class="gi">+extern void (*_machine_kexec_shutdown)(void);</span>
<span class="gi">+extern void (*_machine_crash_shutdown)(struct pt_regs *regs);</span>
<span class="gi">+extern void default_machine_crash_shutdown(struct pt_regs *regs);</span>
<span class="gi">+#ifdef CONFIG_SMP</span>
<span class="gi">+extern const unsigned char kexec_smp_wait[];</span>
<span class="gi">+extern unsigned long secondary_kexec_args[4];</span>
<span class="gi">+extern void (*relocated_kexec_smp_wait) (void *);</span>
<span class="gi">+extern atomic_t kexec_ready_to_reboot;</span>
<span class="gi">+#endif</span>
<span class="gi">+#endif</span>
<span class="gi">+</span>
#endif /* !_MIPS_KEXEC */
<span class="gd">--- a/arch/mips/include/asm/smp.h</span>
<span class="gi">+++ b/arch/mips/include/asm/smp.h</span>
<span class="gu">@@ -40,6 +40,8 @@ extern int __cpu_logical_map[NR_CPUS];</span>
#define SMP_CALL_FUNCTION 0x2
/* Octeon - Tell another core to flush its icache */
#define SMP_ICACHE_FLUSH 0x4
<span class="gi">+/* Used by kexec crashdump to save all cpu's state */</span>
<span class="gi">+#define SMP_DUMP 0x8</span>
extern volatile cpumask_t cpu_callin_map;
<span class="gu">@@ -91,4 +93,9 @@ static inline void arch_send_call_functi</span>
mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
}
<span class="gi">+extern void core_send_ipi(int cpu, unsigned int action);</span>
<span class="gi">+#if defined(CONFIG_KEXEC)</span>
<span class="gi">+extern void (*dump_ipi_function_ptr)(void *);</span>
<span class="gi">+void dump_send_ipi(void (*dump_ipi_callback)(void *));</span>
<span class="gi">+#endif</span>
#endif /* __ASM_SMP_H */
</pre></div>
</code></pre></td></tr></table>
</div> <!-- class=content -->
<div class='footer'>generated by <a href='https://git.zx2c4.com/cgit/about/'>cgit v1.2.3</a> (<a href='https://git-scm.com/'>git 2.25.1</a>) at 2025-03-30 22:34:47 +0000</div>
</div> <!-- id=cgit -->
</body>
</html>