mirror of
https://gitee.com/Vancouver2017/luban-lite-t3e-pro.git
synced 2025-12-14 10:28:54 +00:00
312 lines
16 KiB
HTML
312 lines
16 KiB
HTML
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-cn" lang="zh-cn" data-whc_version="26.0">
|
||
<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><meta name="description" content="后初始化阶段是代码重定位之后执行的初始化流程，由下面的 board_init_r 开始。 _start // arch/riscv/cpu/start.S |-> save_boot_params // arch/riscv/mach-artinchip/lowlevel_init.S |-> ... |-> board_init_f(); // common/board_f.c |-> ..."/><meta name="DC.rights.owner" content="(C) 版权 2025"/><meta name="copyright" content="(C) 版权 2025"/><meta name="generator" content="DITA-OT"/><meta name="DC.type" content="concept"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.date.modified" content="2024-12-04"/><meta name="DC.format" content="HTML5"/><meta name="DC.identifier" content="concept_p55_hl3_pzb"/><meta name="DC.language" content="zh-CN"/><title>后初始化</title><!-- Build number 2023110923. --><meta name="wh-path2root" content="../../../"/><meta name="wh-toc-id" content=""/><meta name="wh-source-relpath" content="topics/sdk/boot/uboot-post-init.dita"/><meta name="wh-out-relpath" content="topics/sdk/boot/uboot-post-init.html"/>
|
||
|
||
<link rel="stylesheet" type="text/css" href="../../../webhelp/app/commons.css?buildId=2023110923"/>
|
||
<link rel="stylesheet" type="text/css" href="../../../webhelp/app/topic.css?buildId=2023110923"/>
|
||
|
||
<script src="../../../webhelp/app/options/properties.js?buildId=20250121171154"></script>
|
||
<script src="../../../webhelp/app/localization/strings.js?buildId=2023110923"></script>
|
||
<script src="../../../webhelp/app/search/index/keywords.js?buildId=20250121171154"></script>
|
||
<script defer="defer" src="../../../webhelp/app/commons.js?buildId=2023110923"></script>
|
||
<script defer="defer" src="../../../webhelp/app/topic.js?buildId=2023110923"></script>
|
||
<link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-styles-web.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/notes.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-common.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-images.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/footnote.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-web-watermark.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/topic-body-list.css?buildId=2023110923"/></head>
|
||
|
||
<body id="concept_p55_hl3_pzb" class="wh_topic_page frmBody">
|
||
<a href="#wh_topic_body" class="sr-only sr-only-focusable">
|
||
跳转到主要内容
|
||
</a>
|
||
|
||
|
||
|
||
|
||
<header class="navbar navbar-default wh_header">
|
||
<div class="container-fluid">
|
||
<div class="wh_header_flex_container navbar-nav navbar-expand-md navbar-dark">
|
||
<div class="wh_logo_and_publication_title_container">
|
||
<div class="wh_logo_and_publication_title">
|
||
|
||
<a href="http://www.artinchip.com" class=" wh_logo d-none d-sm-block "><img src="../../../company-logo-white.png" alt="RTOS SDK 使用指南SDK 指南文件"/></a>
|
||
<div class=" wh_publication_title "><a href="../../../index.html"><span class="booktitle"><span class="ph mainbooktitle">RTOS SDK 使用指南</span><span class="ph booktitlealt">SDK 指南文件</span></span></a></div>
|
||
|
||
</div>
|
||
|
||
|
||
</div>
|
||
|
||
<div class="wh_top_menu_and_indexterms_link collapse navbar-collapse" id="wh_top_menu_and_indexterms_link">
|
||
|
||
|
||
|
||
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</header>
|
||
|
||
|
||
|
||
|
||
<div class=" wh_search_input navbar-form wh_topic_page_search search " role="form">
|
||
|
||
|
||
|
||
<form id="searchForm" method="get" role="search" action="../../../search.html"><div><input type="search" placeholder="搜索 " class="wh_search_textfield" id="textToSearch" name="searchQuery" aria-label="搜索查询" required="required"/><button type="submit" class="wh_search_button" aria-label="搜索"><span class="search_input_text">搜索</span></button></div></form>
|
||
|
||
|
||
|
||
</div>
|
||
|
||
<div class="container-fluid" id="wh_topic_container">
|
||
<div class="row">
|
||
|
||
<nav class="wh_tools d-print-none navbar-expand-md" aria-label="Tools">
|
||
|
||
<div data-tooltip-position="bottom" class=" wh_breadcrumb "></div>
|
||
|
||
|
||
|
||
<div class="wh_right_tools">
|
||
<button class="wh_hide_highlight" aria-label="切换搜索突出显示" title="切换搜索突出显示"></button>
|
||
<button class="webhelp_expand_collapse_sections" data-next-state="collapsed" aria-label="折叠截面" title="折叠截面"></button>
|
||
|
||
|
||
|
||
|
||
<div class=" wh_print_link print d-none d-md-inline-block "><button onClick="window.print()" title="打印此页" aria-label="打印此页"></button></div>
|
||
|
||
|
||
</div>
|
||
|
||
</nav>
|
||
</div>
|
||
|
||
|
||
|
||
|
||
<div class="wh_content_area">
|
||
<div class="row">
|
||
|
||
|
||
<div class="col-12" id="wh_topic_body">
|
||
|
||
|
||
|
||
<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/boot/uboot-post-init.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">后初始化</h1><div class="date inPage">4 Dec 2024</div><div style="color: gray;">
|
||
Read time: 3 minute(s)
|
||
</div><div class="- topic/body concept/conbody body conbody"><div class="- topic/p p" data-ofbid="d230528e22__20250121171651">后初始化阶段是代码重定位之后执行的初始化流程，由下面的 <span class="+ topic/keyword pr-d/apiname keyword apiname">board_init_r</span>
|
||
开始。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_p55_hl3_pzb__codeblock_nmj_lmr_c1c" data-ofbid="concept_p55_hl3_pzb__codeblock_nmj_lmr_c1c">_start <em class="hl-comment">// arch/riscv/cpu/start.S</em>
|
||
|-> save_boot_params <em class="hl-comment">// arch/riscv/mach-artinchip/lowlevel_init.S</em>
|
||
|-> ...
|
||
|-> board_init_f(); <em class="hl-comment">// common/board_f.c</em>
|
||
|-> setup_reloc(); <em class="hl-comment">// common/board_f.c</em>
|
||
|-> jump_to_copy(); <em class="hl-comment">// common/board_f.c</em>
|
||
|-> relocate_code(); <em class="hl-comment">// arch/riscv/cpu/start.S</em>
|
||
| <em class="hl-comment">// RISCV 上的实现，relocate 之后，函数不返回，直接跳转到 board_init_r 执行</em>
|
||
|-> invalidate_icache_all()
|
||
|-> flush_dcache_all()
|
||
|-> board_init_r();</pre></div><div class="- topic/p p" data-ofbid="d230528e29__20250121171651"><span class="+ topic/keyword pr-d/apiname keyword apiname">board_init_r</span> 函数中逐个执行函数列表 <span class="+ topic/keyword pr-d/apiname keyword apiname">init_sequence_r</span>
|
||
中的初始化函数。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_p55_hl3_pzb__codeblock_flf_mmr_c1c" data-ofbid="concept_p55_hl3_pzb__codeblock_flf_mmr_c1c"><strong class="hl-keyword">static</strong> init_fnc_t init_sequence_r[] = {
|
||
initr_trace,
|
||
initr_reloc,
|
||
#ifdef CONFIG_ARM
|
||
initr_caches,
|
||
#endif
|
||
initr_reloc_global_data,
|
||
initr_barrier,
|
||
initr_malloc,
|
||
log_init,
|
||
initr_bootstage, <em class="hl-comment">/* Needs malloc() but has its own timer */</em>
|
||
initr_console_record,
|
||
#ifdef CONFIG_SYS_NONCACHED_MEMORY
|
||
initr_noncached,
|
||
#endif
|
||
bootstage_relocate,
|
||
#ifdef CONFIG_OF_LIVE
|
||
initr_of_live,
|
||
#endif
|
||
#ifdef CONFIG_DM
|
||
initr_dm,
|
||
#endif
|
||
#<strong class="hl-keyword">if</strong> defined(CONFIG_ARM) || defined(CONFIG_NDS32) || defined(CONFIG_RISCV) || \
|
||
defined(CONFIG_SANDBOX)
|
||
board_init, <em class="hl-comment">/* Setup chipselects */</em>
|
||
#endif
|
||
stdio_init_tables,
|
||
initr_serial,
|
||
initr_announce,
|
||
#<strong class="hl-keyword">if</strong> CONFIG_IS_ENABLED(WDT)
|
||
initr_watchdog,
|
||
#endif
|
||
INIT_FUNC_WATCHDOG_RESET
|
||
#ifdef CONFIG_NEEDS_MANUAL_RELOC
|
||
initr_manual_reloc_cmdtable,
|
||
#endif
|
||
#ifdef CONFIG_ADDR_MAP
|
||
initr_addr_map,
|
||
#endif
|
||
#<strong class="hl-keyword">if</strong> defined(CONFIG_BOARD_EARLY_INIT_R)
|
||
board_early_init_r,
|
||
#endif
|
||
INIT_FUNC_WATCHDOG_RESET
|
||
#ifdef CONFIG_POST
|
||
initr_post_backlog,
|
||
#endif
|
||
INIT_FUNC_WATCHDOG_RESET
|
||
#ifdef CONFIG_ARCH_EARLY_INIT_R
|
||
arch_early_init_r,
|
||
#endif
|
||
power_init_board,
|
||
#ifdef CONFIG_MTD_NOR_FLASH
|
||
initr_flash,
|
||
#endif
|
||
INIT_FUNC_WATCHDOG_RESET
|
||
#ifdef CONFIG_CMD_NAND
|
||
initr_nand,
|
||
#endif
|
||
#ifdef CONFIG_CMD_ONENAND
|
||
initr_onenand,
|
||
#endif
|
||
#ifdef CONFIG_MMC
|
||
initr_mmc,
|
||
#endif
|
||
initr_env,
|
||
#ifdef CONFIG_SYS_BOOTPARAMS_LEN
|
||
initr_malloc_bootparams,
|
||
#endif
|
||
INIT_FUNC_WATCHDOG_RESET
|
||
initr_secondary_cpu,
|
||
#<strong class="hl-keyword">if</strong> defined(CONFIG_ID_EEPROM) || defined(CONFIG_SYS_I2C_MAC_OFFSET)
|
||
mac_read_from_eeprom,
|
||
#endif
|
||
INIT_FUNC_WATCHDOG_RESET
|
||
stdio_add_devices,
|
||
initr_jumptable,
|
||
#ifdef CONFIG_API
|
||
initr_api,
|
||
#endif
|
||
console_init_r, <em class="hl-comment">/* fully init console as a device */</em>
|
||
#ifdef CONFIG_DISPLAY_BOARDINFO_LATE
|
||
console_announce_r,
|
||
show_board_info,
|
||
#endif
|
||
#ifdef CONFIG_ARCH_MISC_INIT
|
||
arch_misc_init, <em class="hl-comment">/* miscellaneous arch-dependent init */</em>
|
||
#endif
|
||
#ifdef CONFIG_MISC_INIT_R
|
||
misc_init_r, <em class="hl-comment">/* miscellaneous platform-dependent init */</em>
|
||
#endif
|
||
INIT_FUNC_WATCHDOG_RESET
|
||
interrupt_init,
|
||
#ifdef CONFIG_ARM
|
||
initr_enable_interrupts,
|
||
#endif
|
||
#ifdef CONFIG_CMD_NET
|
||
initr_ethaddr,
|
||
#endif
|
||
#ifdef CONFIG_BOARD_LATE_INIT
|
||
board_late_init,
|
||
#endif
|
||
#ifdef CONFIG_CMD_NET
|
||
INIT_FUNC_WATCHDOG_RESET
|
||
initr_net,
|
||
#endif
|
||
#ifdef CONFIG_POST
|
||
initr_post,
|
||
#endif
|
||
#<strong class="hl-keyword">if</strong> defined(CONFIG_PRAM)
|
||
initr_mem,
|
||
#endif
|
||
run_main_loop,
|
||
};</pre></div><div class="- topic/p p" data-ofbid="d230528e38__20250121171651">其中下面几个重要的阶段需要留意。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_p55_hl3_pzb__codeblock_mjr_mmr_c1c" data-ofbid="concept_p55_hl3_pzb__codeblock_mjr_mmr_c1c">board_init_r();
|
||
|
|
||
|-> initr_dm <em class="hl-comment">// 初始化设备驱动，这次扫描所有的设备，并且绑定到匹配的驱动上</em>
|
||
| |-> dm_init_and_scan(false);
|
||
| |-> dm_init(IS_ENABLED(CONFIG_OF_LIVE)); <em class="hl-comment">// drivers/core/root.c</em>
|
||
| |-> dm_scan_platdata(pre_reloc_only=true);
|
||
| |-> dm_extended_scan_fdt(gd->fdt_blob, pre_reloc_only=true);
|
||
| |-> dm_scan_other(pre_reloc_only);
|
||
|
|
||
|-> initr_flash <em class="hl-comment">// SPI NOR 的初始化</em>
|
||
| |-> flash_size = flash_init();
|
||
|
|
||
|-> initr_nand <em class="hl-comment">// RAW NAND 的初始化</em>
|
||
|-> initr_mmc
|
||
| |-> mmc_initialize(gd->bd);
|
||
|
|
||
|-> initr_env
|
||
| |-> env_relocate(); <em class="hl-comment">// env/common.c</em>
|
||
| |-> env_load(); <em class="hl-comment">// env/env.c</em>
|
||
|
|
||
|-> stdio_add_devices();
|
||
|
|
||
|-> board_late_init(); <em class="hl-comment">// board/artinchip/d211/d211.c</em>
|
||
|-> setup_boot_device();
|
||
|-> env_set(<span class="hl-string">"boot_device"</span>, <span class="hl-string">"mmc"</span>);</pre></div><p class="- topic/p p" data-ofbid="d230528e42__20250121171651"><strong class="+ topic/ph hi-d/b ph b">Cache Enable</strong></p><p class="- topic/p p" data-ofbid="d230528e45__20250121171651">RISCV 上，U-Boot 运行在 S-Mode，没有权限开关 Cache，因此只能由 SPL 来开关 Cache。</p><p class="- topic/p p" data-ofbid="d230528e47__20250121171651"><strong class="+ topic/ph hi-d/b ph b">Device Model</strong></p><p class="- topic/p p" data-ofbid="d230528e50__20250121171651">在后初始化阶段，会扫描所有的设备和驱动，并且将设备和对应的驱动进行绑定。</p><p class="- topic/p p" data-ofbid="d230528e52__20250121171651"><strong class="+ topic/ph hi-d/b ph b">存储介质的初始化</strong></p><p class="- topic/p p" data-ofbid="d230528e55__20250121171651">NOR/NAND/MMC 等存储介质的驱动在这个阶段开始初始化。</p><p class="- topic/p p" data-ofbid="d230528e57__20250121171651"><strong class="+ topic/ph hi-d/b ph b">环境变量加载</strong></p><p class="- topic/p p" data-ofbid="d230528e60__20250121171651">环境变量中保存着 U-Boot 的配置，以及相关的启动信息，此时需要从对应的存储介质中加载使用。</p><p class="- topic/p p" data-ofbid="d230528e63__20250121171651"><strong class="+ topic/ph hi-d/b ph b">显示驱动</strong></p><p class="- topic/p p" data-ofbid="d230528e66__20250121171651">如果项目使能了 U-Boot 阶段的显示，此时在 <span class="+ topic/keyword pr-d/apiname keyword apiname">stdio_add_devices()</span> 中对显示和按键驱动进行初始化。</p><p class="- topic/p p" data-ofbid="d230528e71__20250121171651"><strong class="+ topic/ph hi-d/b ph b">其他配置</strong></p><p class="- topic/p p" data-ofbid="d230528e74__20250121171651">在 <span class="+ topic/keyword pr-d/apiname keyword apiname">board_late_init()</span> 中，将从 SPL 传递过来的启动设备信息，更新到环境变量中，使得后续的启动脚本
|
||
可以获知当前的启动设备信息。</p></div></article></main></div>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</div>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
|
||
|
||
</div>
|
||
<footer class="navbar navbar-default wh_footer">
|
||
<div class=" footer-container mx-auto ">
|
||
<title>footer def</title>
|
||
<style><!--
|
||
|
||
.p1 {
|
||
font-family: FangZhengShuSong, Times, serif;
|
||
}
|
||
.p2 {
|
||
font-family: Arial, Helvetica, sans-serif;
|
||
}
|
||
.p3 {
|
||
font-family: "Lucida Console", "Courier New", monospace;
|
||
}
|
||
|
||
--></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: 2025-01-21
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</footer>
|
||
|
||
<div id="go2top" class="d-print-none">
|
||
<span class="oxy-icon oxy-icon-up"></span>
|
||
</div>
|
||
|
||
<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> |