准备

请看友善 som-rk3399 uboot 移植

uboot

介绍

基于 TPL/SPL uboot 文件生成依赖关系

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idbloader.img <-------- U-Boot TPL/SPL
u-boot.itb <----------- U-Boot 和 bl31.elf

uboot 源码下载

这里选择 v2023.07.y 版本

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git clone https://source.denx.de/u-boot/u-boot.git -b u-boot-2023.07.y

编译 uboot

使用 uboot 配置文件

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make distclean -j12 ARCH=arm CROSS_COMPILE=aarch64-linux-gnu-
make evb-rk3399_defconfig -j12 ARCH=arm CROSS_COMPILE=aarch64-linux-gnu-

编译 uboot 命令

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make -j12 ARCH=arm CROSS_COMPILE=aarch64-linux-gnu-

出现错误，这个问题是缺少 python setuptools 工具

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  File "/home/mo/develop/som-rk3399/sdk/uboot/u-boot-u-boot-2023.07.y/scripts/dtc/pylibfdt/setup.py", line 23, in <module>
    from setuptools import setup, Extension
ModuleNotFoundError: No module named 'setuptools'
make[2]: *** [scripts/dtc/pylibfdt/Makefile:33: rebuild] Error 1
make[1]: *** [scripts/Makefile.build:397: scripts/dtc/pylibfdt] Error 2
make[1]: *** Waiting for unfinished jobs....
  UPD     include/generated/generic-asm-offsets.h
  UPD     include/generated/asm-offsets.h
  LDS     u-boot.lds
make: *** [Makefile:2012: scripts_dtc] Error 2

安装 python 依赖

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sudo apt install python3-pip
pip install setuptools

再次执行编译 uboot 命令

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make -j12 ARCH=arm CROSS_COMPILE=aarch64-linux-gnu-

出现错误，这个错误是因为在 .,.,./board/rockchip/evb_rk3399,arch/arm/dts 目录下找不到 atf-bl31 文件，这个文件我们可以自行编译 atf 获得，或者使用 rockchip 编译好的 atf 文件

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binman: Filename 'atf-bl31' not found in input path (.,.,./board/rockchip/evb_rk3399,arch/arm/dts) (cwd='/home/mo/develop/som-rk3399/sdk/uboot/u-boot-u-boot-2023.07.y')
make: *** [Makefile:1114: .binman_stamp] Error 1

ATF github

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https://github.com/ARM-software/arm-trusted-firmware

atf-bl31

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https://github.com/rockchip-linux/rkbin/tree/master/bin/rk33

下载好后我们放到 uboot 根目录, 重定向 atf-bl31 文件地址

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export BL31=${BL31_PATH}

再次执行编译 uboot 命令

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make -j12 ARCH=arm CROSS_COMPILE=aarch64-linux-gnu-

出现错误，这个是因为缺少 python 工具 elftools

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Wrote map file './simple-bin.map' to show errors
binman: Node '/binman/simple-bin/fit': subnode 'images/@atf-SEQ': Failed to read ELF file: Python: No module named 'elftools'
make: *** [Makefile:1115: .binman_stamp] Error 1

安装 python elftools

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pip install pyelftools

再次执行编译 uboot 命令编译成功

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make -j12 ARCH=arm CROSS_COMPILE=aarch64-linux-gnu-