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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/spienc/spi-enc-debug_guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">调试指南</h1><div class="date inPage">16 Dec 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><section class="- topic/section section" id="spi_enc_debug_guide__section_rf3_hrx_21c" data-ofbid="spi_enc_debug_guide__section_rf3_hrx_21c"><h2 class="- topic/title title sectiontitle">调试开关</h2>
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<div class="- topic/p p" data-ofbid="d97106e27__20250121171535">通过内核配置使能 SPI_ENC 模块的 DEBUG 选项：<ol class="- topic/ol ol" id="spi_enc_debug_guide__ol_vdn_bxl_sdc" data-ofbid="spi_enc_debug_guide__ol_vdn_bxl_sdc"><li class="- topic/li li" data-ofbid="d97106e30__20250121171535">
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<div class="- topic/div div">
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<div class="- topic/p p" data-ofbid="d97106e34__20250121171535">在 SDK 根目录下，执行下列命令，进入 kernel
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的功能配置界面：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_enc_debug_guide__codeblock_wg1_3ml_sdc" data-ofbid="spi_enc_debug_guide__codeblock_wg1_3ml_sdc">make kernel-menuconfig</pre></div>
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<p class="- topic/p p" data-ofbid="d97106e39__20250121171535">或使用简写命令</p>
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<div class="- topic/p p" data-ofbid="d97106e42__20250121171535">
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_enc_debug_guide__codeblock_uss_hml_sdc" data-ofbid="spi_enc_debug_guide__codeblock_uss_hml_sdc">make km</pre>
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</div>
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</div>
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</li><li class="- topic/li li" data-ofbid="d97106e49__20250121171535">
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<div class="- topic/p p" data-ofbid="d97106e51__20250121171535">在内核的配置界面，勾选下列选项：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_enc_debug_guide__pre_tf3_hrx_21c" data-ofbid="spi_enc_debug_guide__pre_tf3_hrx_21c">Linux
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Kernel hacking
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Artinchip Debug
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[*] SPI ENC driver debug</pre></div>
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</li></ol></div>
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<div class="- topic/p p" data-ofbid="d97106e57__20250121171535">打开 DEBUG 选项后：<ul class="- topic/ul ul" id="spi_enc_debug_guide__ol_ucp_mss_c1c" data-ofbid="spi_enc_debug_guide__ol_ucp_mss_c1c"><li class="- topic/li li" data-ofbid="d97106e60__20250121171535">
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<p class="- topic/p p" data-ofbid="d97106e62__20250121171535">驱动以<code class="+ topic/ph pr-d/codeph ph codeph">-O0</code> 编译。</p>
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</li><li class="- topic/li li" data-ofbid="d97106e68__20250121171535">
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<p class="- topic/p p" data-ofbid="d97106e70__20250121171535"><span class="+ topic/keyword pr-d/parmname keyword parmname">pr_dbg()</span> 和 <span class="+ topic/keyword pr-d/parmname keyword parmname">dev_dbg()</span> 调试信息会被编译。</p>
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<div class="- topic/p p" id="spi_enc_debug_guide__p_wvf_n3w_mdc" data-ofbid="spi_enc_debug_guide__p_wvf_n3w_mdc">在系统运行时，如果要打印 <span class="+ topic/keyword pr-d/parmname keyword parmname">pr_dbg()</span> 和
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<span class="+ topic/keyword pr-d/parmname keyword parmname">dev_dbg()</span> 信息，还需要调整 <span class="+ topic/keyword pr-d/parmname keyword parmname">loglevel</span> 为
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8，可以通过以下两种方式实现：<ul class="- topic/ul ul" id="spi_enc_debug_guide__ol_vcp_mss_c1c" data-ofbid="spi_enc_debug_guide__ol_vcp_mss_c1c"><li class="- topic/li li" data-ofbid="d97106e90__20250121171535">
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<p class="- topic/p p" data-ofbid="d97106e92__20250121171535">在 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 中修改
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<span class="+ topic/keyword pr-d/parmname keyword parmname">bootargs</span>，增加
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<span class="+ topic/keyword pr-d/parmname keyword parmname">“loglevel=8”</span></p>
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</li><li class="- topic/li li" data-ofbid="d97106e103__20250121171535">
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<div class="- topic/p p" data-ofbid="d97106e105__20250121171535">在板子启动到 Linux Shell
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后，执行下列命令：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_enc_debug_guide__pre_wcp_mss_c1c" data-ofbid="spi_enc_debug_guide__pre_wcp_mss_c1c">echo8 > /proc/sys/kernel/printk</pre></div>
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</li></ul></div>
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</li></ul></div>
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</section><section class="- topic/section section" id="spi_enc_debug_guide__section_xf3_hrx_21c" data-ofbid="spi_enc_debug_guide__section_xf3_hrx_21c"><h2 class="- topic/title title sectiontitle">Sysfs 节点</h2>
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<p class="- topic/p p" data-ofbid="d97106e117__20250121171535">SPI_ENC 驱动在 <code class="+ topic/ph pr-d/codeph ph codeph">/sys/devices/platform/soc/</code> 目录下创建了 Sysfs 节点
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<code class="+ topic/ph pr-d/codeph ph codeph">18100000.spienc/</code></p>
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<p class="- topic/p p" data-ofbid="d97106e125__20250121171535">其中通过下列命令可读取当前硬件状态：</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_enc_debug_guide__pre_yf3_hrx_21c" data-ofbid="spi_enc_debug_guide__pre_yf3_hrx_21c">cat /sys/devices/platform/soc/<span class="hl-number">18100000.</span>spienc/status
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</pre>
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<p class="- topic/p p" data-ofbid="d97106e131__20250121171535">如果按照上一节的指引，使能了调试开关，还可以看到节点：</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_enc_debug_guide__pre_zf3_hrx_21c" data-ofbid="spi_enc_debug_guide__pre_zf3_hrx_21c">/sys/devices/platform/soc/<span class="hl-number">18100000.</span>spienc/bypass
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</pre>
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<p class="- topic/p p" data-ofbid="d97106e138__20250121171535">通过下列命令，可以开关 ByPass SPIENC 加密功能：</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_enc_debug_guide__pre_ag3_hrx_21c" data-ofbid="spi_enc_debug_guide__pre_ag3_hrx_21c">echo <span class="hl-string">"1"</span> > /sys/devices/platform/soc/<span class="hl-number">18100000.</span>spienc/bypass
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echo <span class="hl-string">"0"</span> > /sys/devices/platform/soc/<span class="hl-number">18100000.</span>spienc/bypass
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</pre>
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<p class="- topic/p p" data-ofbid="d97106e144__20250121171535">ByPass 之后，读写 SPI 存储的数据都是原始数据，不会做加密或者解密。</p>
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<div class="- topic/note note tip note_tip" id="spi_enc_debug_guide__note_jts_hrx_21c" data-ofbid="spi_enc_debug_guide__note_jts_hrx_21c"><span class="note__title">提示：</span>
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<p class="- topic/p p" data-ofbid="d97106e149__20250121171535">Bypass 是一个调试功能，如果没有按照上节的指引勾选 [*] SPI ENC driver debug，则 Sysfs 中没有 bypass
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文件节点。</p>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#spi_enc_debug_guide__section_rf3_hrx_21c" data-tocid="spi_enc_debug_guide__section_rf3_hrx_21c">调试开关</a></div></li><li class="section-item"><div class="section-title"><a href="#spi_enc_debug_guide__section_xf3_hrx_21c" data-tocid="spi_enc_debug_guide__section_xf3_hrx_21c">Sysfs 节点</a></div></li></ul></div>
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