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class="wh-tooltip"><p class="shortdesc"></p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-memory-d4445e4054" class="topicref" data-id="chapter-memory" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-memory-d4445e4054-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-memory-sdk.html" id="chapter-memory-d4445e4054-link">存储</a><div class="wh-tooltip"><p class="shortdesc">SDMC、SPI NAND、SPI NOR 等存储模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_mcc_32s_nbc-d4445e4438" class="topicref" data-id="concept_mcc_32s_nbc" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_mcc_32s_nbc-d4445e4438-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-multi-media-sdk.html" id="concept_mcc_32s_nbc-d4445e4438-link">多媒体</a><div class="wh-tooltip"><p class="shortdesc">GE、VE、Display、DVP、MPP、MPP 播放器等多媒体模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_nww_hzh_pzb-d4445e5947" class="topicref" data-id="concept_nww_hzh_pzb" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_nww_hzh_pzb-d4445e5947-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-interface-sdk.html" id="concept_nww_hzh_pzb-d4445e5947-link">接口</a><div class="wh-tooltip"><p class="shortdesc">CAN、CIR、GPAI、GPIO、I2C、PSADC、PWM 等接口模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d4445e7944" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d4445e7944-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d4445e7944-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
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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">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/boot/save-env-variable-on-memory-medium.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">存储介质上的保存</h1>
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|
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<div class="date inPage">15 Jan 2024</div><div style="color: gray;">
|
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Read time: 2 minute(s)
|
||
</div>
|
||
<div class="- topic/body concept/conbody body conbody">
|
||
<p class="- topic/p p" data-ofbid="d78927e33__20250123155205">在使用过程中，保存在存储设备上的环境变量内容可能会被修改，因此选择存储位置时需要考虑存储介质的特点。 比如 MTD
|
||
设备上要注意保存在独立的擦除块上，以免在修改时影响其他数据的完整性。</p>
|
||
<p class="- topic/p p" data-ofbid="d78927e36__20250123155205">常见的保存方式有下面两种：</p>
|
||
<ul class="- topic/ul ul" id="concept_qhg_gl3_pzb__ul_ehm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__ul_ehm_d1h_bzb">
|
||
<li class="- topic/li li" data-ofbid="d78927e41__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e43__20250123155205">与 U-Boot 一起保存</p>
|
||
<p class="- topic/p p" data-ofbid="d78927e46__20250123155205">在使用 MMC 存储时，有些方案会将 ENV 保存在 U-Boot 的分区，并且放在 U-Boot 分区的尾部。 通过在 DTS
|
||
中指定分区名字即可访问到。</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e50__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e52__20250123155205">单独分区保存</p>
|
||
<p class="- topic/p p" data-ofbid="d78927e55__20250123155205">多数方案使用单独的分区保存。</p>
|
||
</li>
|
||
</ul>
|
||
<p class="- topic/p p" data-ofbid="d78927e60__20250123155205">在 ArtInChip 平台上，不同存储介质上 ENV 的默认保存设置如下文所述。</p>
|
||
<section class="- topic/section section" id="concept_qhg_gl3_pzb__section_fhm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__section_fhm_d1h_bzb"><h2 class="- topic/title title sectiontitle">MMC</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d78927e68__20250123155205">MMC 的 ENV 存储位置可以通过下面几个方式进行设置：</p>
|
||
<ul class="- topic/ul ul" id="concept_qhg_gl3_pzb__ul_ghm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__ul_ghm_d1h_bzb">
|
||
<li class="- topic/li li" data-ofbid="d78927e73__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e75__20250123155205">Kconfig 配置指定 Offset 和 大小</p>
|
||
<ul class="- topic/ul ul" id="concept_qhg_gl3_pzb__ul_hhm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__ul_hhm_d1h_bzb">
|
||
<li class="- topic/li li" data-ofbid="d78927e80__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e82__20250123155205">CONFIG_ENV_OFFSET</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e86__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e88__20250123155205">CONFIG_ENV_OFFSET_REDUND</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e92__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e94__20250123155205">CONFIG_ENV_SIZE</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e98__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e100__20250123155205">CONFIG_ENV_IS_IN_MMC</p>
|
||
</li>
|
||
</ul>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e106__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e108__20250123155205">DTS 中配置 offset，Kconfig 配置大小</p>
|
||
<ul class="- topic/ul ul" id="concept_qhg_gl3_pzb__ul_ihm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__ul_ihm_d1h_bzb">
|
||
<li class="- topic/li li" data-ofbid="d78927e113__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e115__20250123155205">“u-boot,mmc-env-offset”</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e119__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e121__20250123155205">“u-boot,mmc-env-offset-redundant”</p>
|
||
</li>
|
||
</ul>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e127__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e129__20250123155205">DTS 中配置分区名字，Kconfig 配置大小</p>
|
||
<ul class="- topic/ul ul" id="concept_qhg_gl3_pzb__ul_jhm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__ul_jhm_d1h_bzb">
|
||
<li class="- topic/li li" data-ofbid="d78927e134__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e136__20250123155205">“u-boot,mmc-env-partition”</p>
|
||
</li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
<p class="- topic/p p" data-ofbid="d78927e143__20250123155205">目前默认的配置使用最后一种方式，通过 DTS 中的 config 节点配置：</p>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_qhg_gl3_pzb__pre_khm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__pre_khm_d1h_bzb"><code>config{u-boot,mmc-env-partition=<span class="hl-string">"env"</span>;};</code></pre>
|
||
<p class="- topic/p p" data-ofbid="d78927e150__20250123155205">u-boot,mmc-env-partition = “env” 表示环境变量使用独立分区的方式，保存在 mmc 设备的”env”分区上。</p>
|
||
<p class="- topic/p p" data-ofbid="d78927e153__20250123155205">通过 Kconfig 设置 <span class="+ topic/keyword pr-d/parmname keyword parmname">CONFIG_ENV_SIZE</span> 大小为 16KB。</p>
|
||
<p class="- topic/p p" data-ofbid="d78927e159__20250123155205">保存 ENV 数据的区域为该分区的前 <span class="+ topic/keyword pr-d/parmname keyword parmname">CONFIG_ENV_SIZE</span> 大小。相关的源码在文件：
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">board/artinchip/d211/mmc_env.c</span> 。</p>
|
||
</section>
|
||
<section class="- topic/section section" id="concept_qhg_gl3_pzb__section_lhm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__section_lhm_d1h_bzb"><h2 class="- topic/title title sectiontitle">SPI NAND</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d78927e175__20250123155205">U-Boot 项目的源码本身没有支持 SPI NAND 启动，环境变量也没有支持从 SPI NAND 读取， ArtInChip 平台增加了 SPI NAND
|
||
的支持。</p>
|
||
<p class="- topic/p p" data-ofbid="d78927e178__20250123155205">ENV 存储位置的配置通过 Kconfig 进行，需要配置的选项有下面几个：</p>
|
||
<ul class="- topic/ul ul" id="concept_qhg_gl3_pzb__ul_mhm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__ul_mhm_d1h_bzb">
|
||
<li class="- topic/li li" data-ofbid="d78927e183__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e185__20250123155205">CONFIG_ENV_OFFSET</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e189__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e191__20250123155205">CONFIG_ENV_SIZE</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e195__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e197__20250123155205">CONFIG_ENV_RANGE</p>
|
||
</li>
|
||
</ul>
|
||
<p class="- topic/p p" data-ofbid="d78927e202__20250123155205">相应的源码在 <span class="+ topic/ph sw-d/filepath ph filepath">env/spinand.c</span> 。</p>
|
||
</section>
|
||
<section class="- topic/section section" id="concept_qhg_gl3_pzb__section_nhm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__section_nhm_d1h_bzb"><h2 class="- topic/title title sectiontitle">SPI NOR</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d78927e214__20250123155205">U-Boot 原本已经支持从 SPI NOR 启动和加载 ENV 内容。ENV 的存储位置通过 Kconfig 进行， 需要配置的选项有下面几个：</p>
|
||
<ul class="- topic/ul ul" id="concept_qhg_gl3_pzb__ul_ohm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__ul_ohm_d1h_bzb">
|
||
<li class="- topic/li li" data-ofbid="d78927e219__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e221__20250123155205">CONFIG_ENV_SPI_BUS</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e225__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e227__20250123155205">CONFIG_ENV_SPI_CS</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e231__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e233__20250123155205">CONFIG_ENV_SPI_MAX_HZ</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e237__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e239__20250123155205">CONFIG_ENV_SPI_MODE</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e243__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e245__20250123155205">CONFIG_ENV_OFFSET</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e250__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e252__20250123155205">CONFIG_ENV_OFFSET_REDUND</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e256__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e258__20250123155205">CONFIG_ENV_SECT_SIZE</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e262__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e264__20250123155205">CONFIG_ENV_SIZE</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d78927e268__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e270__20250123155205">CONFIG_ENV_IS_IN_SPI_FLASH</p>
|
||
</li>
|
||
</ul>
|
||
<p class="- topic/p p" data-ofbid="d78927e275__20250123155205">相应的源码在 <span class="+ topic/ph sw-d/filepath ph filepath">env/sf.c</span> 。</p>
|
||
</section>
|
||
<section class="- topic/section section" id="concept_qhg_gl3_pzb__section_phm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__section_phm_d1h_bzb"><h2 class="- topic/title title sectiontitle">RAM</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d78927e287__20250123155205">ArtInChip 平台上增加了从 DRAM 指定地址加载环境变量的功能，主要用于 USB 升级的场景。 在 USB 升级的过程中，主机端会先发送一个 env.bin
|
||
到设备指定内存地址，然后再启动 u-boot 进行升级。</p>
|
||
<p class="- topic/p p" data-ofbid="d78927e290__20250123155205">相关的配置通过 Kconfig 进行，需要配置的选项有：</p>
|
||
<ul class="- topic/ul ul" id="concept_qhg_gl3_pzb__ul_qhm_d1h_bzb" data-ofbid="concept_qhg_gl3_pzb__ul_qhm_d1h_bzb">
|
||
<li class="- topic/li li" data-ofbid="d78927e295__20250123155205">
|
||
<p class="- topic/p p" data-ofbid="d78927e297__20250123155205">CONFIG_ENV_RAM_ADDR</p>
|
||
</li>
|
||
</ul>
|
||
<p class="- topic/p p" data-ofbid="d78927e302__20250123155205">相应的源码在 <span class="+ topic/ph sw-d/filepath ph filepath">board/artinchip/d211/env_location.c</span> 。</p>
|
||
</section>
|
||
</div>
|
||
</article></main></div>
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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="#concept_qhg_gl3_pzb__section_fhm_d1h_bzb" data-tocid="concept_qhg_gl3_pzb__section_fhm_d1h_bzb">MMC</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_qhg_gl3_pzb__section_lhm_d1h_bzb" data-tocid="concept_qhg_gl3_pzb__section_lhm_d1h_bzb">SPI NAND</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_qhg_gl3_pzb__section_nhm_d1h_bzb" data-tocid="concept_qhg_gl3_pzb__section_nhm_d1h_bzb">SPI NOR</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_qhg_gl3_pzb__section_phm_d1h_bzb" data-tocid="concept_qhg_gl3_pzb__section_phm_d1h_bzb">RAM</a></div></li></ul></div>
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--></style>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<div class="webhelp.fragment.footer">
|
||
<p class="p1">Copyright © 2019-2024 广东匠芯创科技有限公司. All rights reserved.</p>
|
||
</div><div>
|
||
<div class="generation_time">
|
||
Update Time: 2025-01-23
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</footer>
|
||
|
||
<button id="go2top" class="d-print-none" title="返回顶部">
|
||
<span class="oxy-icon oxy-icon-up"></span>
|
||
</button>
|
||
|
||
<div id="modal_img_large" class="modal">
|
||
<span class="close oxy-icon oxy-icon-remove"></span>
|
||
<div id="modal_img_container"></div>
|
||
<div id="caption"></div>
|
||
</div>
|
||
|
||
|
||
<script src="${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer="defer"></script>
|
||
|
||
|
||
</body>
|
||
</html> |