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href="../../../topics/sdk/boot/bundle-images.html" id="concept_uzy_yk3_pzb-d4445e2692-link">打包镜像</a></div></div><ul role="group" class="navbar-nav nav-list"><li role="treeitem"><div data-tocid="aic-d4445e2706" class="topicref" data-id="aic" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/boot/uboot-aic-boot-image-format.html" id="aic-d4445e2706-link">AIC 启动镜像格式</a></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="fitImage_0-d4445e2720" class="topicref" data-id="fitImage_0" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action fitImage_0-d4445e2720-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/boot/fitImage_0.html" id="fitImage_0-d4445e2720-link">FIT Image 介绍</a></div></div><ul role="group" class="navbar-nav nav-list"><li role="treeitem" class="active"><div data-tocid="fitImage_1-d4445e2734" class="topicref" 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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/fitImage_1.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">FIT Image 配置和启动</h1>
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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)
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</div>
|
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<div class="- topic/body concept/conbody body conbody">
|
||
<div class="- topic/p p" data-ofbid="d99493e33__20250123155208">FIT，即 Flattened Image Tree，是参考 Flattened Device Tree 命令而来，具有以下优势。<ul class="- topic/ul ul" id="fitImage_1__ul_n2w_xdh_bzb" data-ofbid="fitImage_1__ul_n2w_xdh_bzb">
|
||
<li class="- topic/li li" data-ofbid="d99493e37__20250123155208">
|
||
<p class="- topic/p p" data-ofbid="d99493e39__20250123155208">更灵活的处理各种类型的 image 类型(压缩、非压缩、各种格式，各种配置组合)</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d99493e43__20250123155208">
|
||
<p class="- topic/p p" data-ofbid="d99493e45__20250123155208">可以处理安全启动过程中的安全校验（签名校验）</p>
|
||
</li>
|
||
</ul></div>
|
||
<div class="- topic/p p" data-ofbid="d99493e50__20250123155208">FIT
|
||
原始参考文档如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="fitImage_1__codeblock_ann_sqr_c1c" data-ofbid="fitImage_1__codeblock_ann_sqr_c1c"><code>source/uboot-<span class="hl-number">2021.10</span>/doc/usage/fit.rst
|
||
source/uboot-<span class="hl-number">2021.10</span>/doc/uImage.FIT/howto.txt
|
||
source/uboot-<span class="hl-number">2021.10</span>/doc/uImage.FIT/source_file_format.txt
|
||
source/uboot-<span class="hl-number">2021.10</span>/doc/uImage.FIT/command_syntax_extensions.txt</code></pre></div>
|
||
<div class="- topic/p p" data-ofbid="d99493e55__20250123155208">Flattened Image Tree，使用 DTS 的语法， 通过一些新增的节点，描述生成镜像文件所使用的 Image 文件和配置。下文以
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">source/uboot-2021.10/doc/uImage.FIT/kernel_fdt.its</span>
|
||
为例进行说明：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="fitImage_1__codeblock_h2c_tqr_c1c" data-ofbid="fitImage_1__codeblock_h2c_tqr_c1c"><code>/dts-v1/;
|
||
|
||
/ {
|
||
description = <span class="hl-string">"Simple image with single Linux kernel and FDT blob"</span>;
|
||
#address-cells = <<span class="hl-number">1</span>>;
|
||
|
||
images {
|
||
kernel {
|
||
description = <span class="hl-string">"Vanilla Linux kernel"</span>;
|
||
data = /incbin/(<span class="hl-string">"./vmlinux.bin.gz"</span>);
|
||
type = <span class="hl-string">"kernel"</span>;
|
||
arch = <span class="hl-string">"ppc"</span>;
|
||
os = <span class="hl-string">"linux"</span>;
|
||
compression = <span class="hl-string">"gzip"</span>;
|
||
load = <<span class="hl-number">00000000</span>>;
|
||
entry = <<span class="hl-number">00000000</span>>;
|
||
hash-<span class="hl-number">1</span> {
|
||
algo = <span class="hl-string">"crc32"</span>;
|
||
};
|
||
hash-<span class="hl-number">2</span> {
|
||
algo = <span class="hl-string">"sha1"</span>;
|
||
};
|
||
};
|
||
fdt-<span class="hl-number">1</span> {
|
||
description = <span class="hl-string">"Flattened Device Tree blob"</span>;
|
||
data = /incbin/(<span class="hl-string">"./target.dtb"</span>);
|
||
type = <span class="hl-string">"flat_dt"</span>;
|
||
arch = <span class="hl-string">"ppc"</span>;
|
||
compression = <span class="hl-string">"none"</span>;
|
||
hash-<span class="hl-number">1</span> {
|
||
algo = <span class="hl-string">"crc32"</span>;
|
||
};
|
||
hash-<span class="hl-number">2</span> {
|
||
algo = <span class="hl-string">"sha1"</span>;
|
||
};
|
||
};
|
||
};
|
||
|
||
configurations {
|
||
<strong class="hl-keyword">default</strong> = <span class="hl-string">"conf-1"</span>;
|
||
conf-<span class="hl-number">1</span> {
|
||
description = <span class="hl-string">"Boot Linux kernel with FDT blob"</span>;
|
||
kernel = <span class="hl-string">"kernel"</span>;
|
||
fdt = <span class="hl-string">"fdt-1"</span>;
|
||
};
|
||
};
|
||
};</code></pre></div>
|
||
<p class="- topic/p p" data-ofbid="d99493e63__20250123155208">上述示例包含了其中包含了 fdt + kernel，以及校验方式的配置。</p>
|
||
<div class="- topic/p p" data-ofbid="d99493e66__20250123155208">FIT image 启动命令说明如下：<ul class="- topic/ul ul" id="fitImage_1__ul_nqm_zqy_nbc" data-ofbid="fitImage_1__ul_nqm_zqy_nbc">
|
||
<li class="- topic/li li" data-ofbid="d99493e70__20250123155208">
|
||
<div class="- topic/p p" data-ofbid="d99493e72__20250123155208">生成 itb image
|
||
的命令：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="fitImage_1__codeblock_vb1_5qr_c1c" data-ofbid="fitImage_1__codeblock_vb1_5qr_c1c"><code>mkimage -f kernel_fdt.its kernel_fdt.itb</code></pre></div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d99493e78__20250123155208">
|
||
<div class="- topic/p p" data-ofbid="d99493e80__20250123155208">使用默认的配置进行启动：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="fitImage_1__codeblock_m24_5qr_c1c" data-ofbid="fitImage_1__codeblock_m24_5qr_c1c"><code>bootm <kernel itb addr></code></pre></div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d99493e86__20250123155208">
|
||
<div class="- topic/p p" data-ofbid="d99493e88__20250123155208">如果 its 中有多个配置，可以指定启动的配置组合，例如 bootm
|
||
0x81000000#conf-2。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="fitImage_1__codeblock_u5z_5qr_c1c" data-ofbid="fitImage_1__codeblock_u5z_5qr_c1c"><code>bootm <kernel itb addr>#<conf-name>
|
||
</code></pre></div>
|
||
</li>
|
||
</ul></div>
|
||
<p class="- topic/p p" data-ofbid="d99493e96__20250123155208">更多说明请参考：source/uboot-2021.10/doc/uImage.FIT/command_syntax_extensions.txt</p>
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