uboot entry point是_start,这个在u-boot.lds里有define _start里执行b reset跳转到reset label处执行 19 .globl _start 20 _start: 21 #if defined(CONFIG_LINUX_KERNEL_IMAGE_HEADER) 22 #include <asm/boot0-linux-kernel-header.h> 23 #elif defined(CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK) 24 /* 25 ...
具体可参考apply_core_errata函数,由CONFIG_ARM_ERRATA_XXX控制,在项目的初期,可以不打开,后续根据实际情况打开)。 2. normal_start_flow流程 这里是正常启动流程 normal_start_flow:/* set stack for C code */ ldr x0,=(CONFIG_SYS_INIT_SP_ADDR) bic sp, x0, #0xf/* 16-byte alignment for ABI c...
* @BOOTDEVP_6_PRE_SCAN: Scan bootdevs with this priority always, before * starting any bootflow scan * @BOOTDEVP_2_INTERNAL_FAST: Internal devices which don't need scanning and * generally very quick to access, e.g. less than 100ms * @BOOTDEVP_3_INTERNAL_SLOW: Internal devices whi...
The bootloader build flow was different from the latest flow found in rocketboards. You can try with the prebuilt binaries from rocket board release, however I not sure Han Pilot board will work with those binaries which meant for Intel Arria10 soc dev kit. Anyway can try to consider the...
Board Initialisation Flow: --- This is the intended start-up flow for boards. This should apply for both SPL and U-Boot proper (i.e. they both follow the same rules). Note: "SPL" stands for "Secondary Program Loader," which is explained in more detail later in this file. At present...
在坑网中主要参考的是沉鱼大佬的帖子“荔枝派Zero V3s开发板入坑记录 (TF/SD卡启动)(主线Linux,主线u-boot)”(https://whycan.com/t_561.html)。 一、基本环境准备 1 使用的虚拟机环境为VMware workstation,安装Ubuntu14.04LTS(按照沉鱼大佬的帖子),虚拟机跟windows互传文件使用的是filezilla(有关该软件的使用...
We have used one USB channel, and the remaining two channels are unused. Stop at erratum during startup_ In the a009007 function. May I ask if this
Active, color, single scan. CONFIG_OPTREX_BW Optrex CBL50840-2 NF-FW 99 22 M5 or Hitachi LMG6912RPFC-00T or Hitachi SP14Q002 320x240. Black & white. Normally display is black on white background; define CONFIG_SYS_WHITE_ON_BLACK to get it inverted. - Splash Screen Support: CONFIG_...
Modem Support: --- [so far only for SMDK2400 and TRAB boards] - Modem support endable: CONFIG_MODEM_SUPPORT - RTS/CTS Flow control enable: CONFIG_HWFLOW - Modem debug support: CONFIG_MODEM_SUPPORT_DEBUG Enables debugging stuff (char screen[1024], dbg()) for modem support. Useful only...
上面这张图是U-Boot中串口设备驱动的流程,从寄存器级别的设置到最后终端信息的输出。下面我们详细讲解每一个步骤。 一、init_baudrate 该函数设置了gd->bd->bi_baudrate。 二、serial_init UART控制器的初始化。 三、console_init_f 控制台的前期初始化。