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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" 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/boot/lite_boot_design_guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">设计说明</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body body"><section class="- topic/section section" id="id__section_uxk_qsm_qdc" data-ofbid="id__section_uxk_qsm_qdc"><h2 class="- topic/title title sectiontitle">源码说明</h2>
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<div class="table-container"><table class="- topic/table table colwidths-given docutils align-default frame-all" id="id__table_cyv_jpc_bdc" data-ofbid="id__table_cyv_jpc_bdc" data-cols="3"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">tinySPL 源码结构</span></caption><colgroup><col style="width:12.406947890818858%"/><col style="width:46.40198511166253%"/><col style="width:41.191066997518604%"/></colgroup><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">Sys</td><td class="- topic/entry entry colsep-1 rowsep-1"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/sys/<chip>/</span></td><td class="- topic/entry entry colsep-0 rowsep-1">SoC 初始化相关代码，与应用共用</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">Board</td><td class="- topic/entry entry colsep-1 rowsep-1"><span class="+ topic/ph sw-d/filepath ph filepath">target/<chip>/<board>/</span></td><td class="- topic/entry entry colsep-0 rowsep-1">板子初始化相关代码，与应用共用</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">HAL</td><td class="- topic/entry entry colsep-1 rowsep-1"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/hal/</span></td><td class="- topic/entry entry colsep-0 rowsep-1">HAL 驱动代码，与应用共用</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0">Boot</td><td class="- topic/entry entry colsep-1 rowsep-0"><span class="+ topic/ph sw-d/filepath ph filepath">application/baremetal/bootloader/</span></td><td class="- topic/entry entry colsep-0 rowsep-0">Bootloader 代码</td></tr></tbody></table></div>
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</section><section class="- topic/section section" id="id__id3" data-ofbid="id__id3"><h2 class="- topic/title title sectiontitle">软件架构</h2>
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<p class="- topic/p p" data-ofbid="d272360e70__20250121171742"><span class="- topic/ph ph">Luban-Lite</span> 使用 tinySPL 作为启动引导程序 (Bootloader)，可以实现加载启动应用程序、 烧录和升级等功能。</p>
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<p class="- topic/p p" data-ofbid="d272360e75__20250121171742">tinySPL 是基于 <span class="- topic/ph ph">Luban-Lite</span> 的 HAL 构建的裸机 (Baremetal) 程序。</p>
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<figure class="- topic/fig fig fignone" id="id__fig_mln_mwc_bdc" data-ofbid="id__fig_mln_mwc_bdc"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_dyv_jpc_bdc" src="../../../images/sdk/boot_arch1.png" alt="boot_arch1"/></div><br/><figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">软件架构</span></figcaption></figure>
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<p class="- topic/p p" data-ofbid="d272360e88__20250121171742">上图中， <code class="+ topic/ph pr-d/codeph ph codeph">HAL</code> 、 <code class="+ topic/ph pr-d/codeph ph codeph">Board</code> 、 <code class="+ topic/ph pr-d/codeph ph codeph">Sys</code> 与 <span class="- topic/ph ph">Luban-Lite</span> SDK 中的应用程序共用同一份代码， 以简化 Boot 对不同板子的支持。</p>
|
||
<div class="- topic/p p" data-ofbid="d272360e104__20250121171742">由于 Boot 的功能和应用场景比较确定和单一，因此这里将 Boot 设计为一个 Baremetal 版本的应用，具有以下特点：<ol class="- topic/ol ol arabic simple" id="id__ol_fyv_jpc_bdc" data-ofbid="id__ol_fyv_jpc_bdc"><li class="- topic/li li" data-ofbid="d272360e107__20250121171742">
|
||
<p class="- topic/p p" data-ofbid="d272360e109__20250121171742">与应用共用部分代码，简化开发和板级配置</p>
|
||
</li><li class="- topic/li li" data-ofbid="d272360e112__20250121171742">
|
||
<p class="- topic/p p" data-ofbid="d272360e114__20250121171742">无线程、无中断处理，只针对单一任务</p>
|
||
</li><li class="- topic/li li" data-ofbid="d272360e117__20250121171742">
|
||
<p class="- topic/p p" data-ofbid="d272360e119__20250121171742">支持命令行模式，可根据需要，定义不同的命令</p>
|
||
</li></ol></div>
|
||
</section><section class="- topic/section section" id="id__id4" data-ofbid="id__id4"><h2 class="- topic/title title sectiontitle">关键流程</h2>
|
||
|
||
<ul class="- topic/ul ul" id="id__ul_qzh_dtm_qdc" data-ofbid="id__ul_qzh_dtm_qdc"><li class="- topic/li li" data-ofbid="d272360e129__20250121171742">
|
||
<strong class="+ topic/ph hi-d/b ph b">系统初始化</strong>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_ekt_w55_hdc" data-ofbid="id__codeblock_ekt_w55_hdc">_start <em class="hl-comment">//bsp/artinchip/sys/d21x/startup_gcc.S</em>
|
||
|-> save_boot_params <em class="hl-comment">// bsp/artinchip/sys/d21x/boot_param_gcc.S</em>
|
||
|-> icache_enable();
|
||
|-> dcache_enable(); <em class="hl-comment">// bsp/artinchip/sys/d21x/system.c</em>
|
||
|-> SystemInit();
|
||
|-> main(); <em class="hl-comment">// application/baremetal/bootloader/main.c</em>
|
||
|-> board_init();
|
||
| |-> heap_init();
|
||
| |-> aic_board_sysclk_init(); <em class="hl-comment">// target/d21x/<board>/board.c</em>
|
||
| |-> aic_board_pinmux_init();
|
||
| |-> uart_init(cons_uart);
|
||
| |-> stdio_set_uart(cons_uart);
|
||
|-> console_init();</pre><p class="- topic/p p" data-ofbid="d272360e136__20250121171742">系统初始化的过程中，并不会设计不必要的驱动等模块的初始化。所有的驱动和模块，
|
||
都只在需要使用时进行初始化，这样可以减少启动过程中的不必要时间消耗，加快启动速度。</p></li><li class="- topic/li li" data-ofbid="d272360e138__20250121171742">
|
||
<div class="- topic/p p" data-ofbid="d272360e140__20250121171742">
|
||
<strong class="+ topic/ph hi-d/b ph b">启动和升级</strong>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_js2_x55_hdc" data-ofbid="id__codeblock_js2_x55_hdc">main(); <em class="hl-comment">// application/baremetal/bootloader/main.c</em>
|
||
|-> board_init();
|
||
|-> console_init();
|
||
|-> bd = aic_get_boot_device();
|
||
| <em class="hl-comment">// 根据启动参数，判断当前的启动设备</em>
|
||
|
|
||
|-> console_set_bootcmd(<span class="hl-string">"nor_boot"</span>);
|
||
| <em class="hl-comment">// 此处根据 boot_device 的类型，设置不同的 bootcmd，比如 aicupg usb 0</em>
|
||
|
|
||
|-> console_loop();
|
||
|-> console_run_cmd(g_console->bootcmd);
|
||
|-> _console_loop(g_console);
|
||
<em class="hl-comment">// 当执行 bootcmd 失败时，会进入串口控制台，等待用户交互</em></pre></div>
|
||
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