STM32MP157-openLinux 更改、重建加载linux内核

最新推荐文章于 2025-04-02 12:10:05 发布

竹中月

最新推荐文章于 2025-04-02 12:10:05 发布

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分类专栏： STM32MP157 文章标签： STM32MP157 openSTLinux

本文链接：https://blog.csdn.net/Ambitious_Man/article/details/103699146

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编译内核：

1、将STM32MP15-Ecosystem-v1.1.0开发人员软件包源下载到以下目录

cd $ HOME / STM32MPU_workspace / STM32MP15-Ecosystem-v1.1.0 / Developer-Package

2、解压缩tarball文件以获得Linux®内核tarball，ST补丁和ST配置片段

tar xvf zh.SOURCES-kernel-stm32mp1-openstlinux-4.19-thud-mp1-19-10-09.tar.xz

提取linux源代码：

cd stm32mp1-openstlinux-4.19-thud-mp1-19-10-09 / sources / arm-openstlinux_weston-linux-gnueabi / linux-stm32mp-4.19-r0

tar xvf linux- 4.19.49.tar.xz

应用ST补丁

cd linux-4.19.49

for p in `ls -1 ../*.patch`; do patch -p1 < $p; done

1.前提条件

2.通过SDK初始化交叉编译

3.准备内核源代码

4.管理内核源代码

5.配置内核源代码

6.编译内核源代码

7.更新板载软件

1、2、启动sdk：$> source <path to SDK>/environment-setup-cortexa7t2hf-neon-vfpv4-openstlinux_weston-linux-gnueabi

验证是否启动ok：set | grep CROSS

3、cd linux-4.19.49

如果有补丁，请在源代码上应用

for p in `ls -1 ../*.patch`; do patch -p1 < $p; done

5、cd linux-4.19.49

配置构建新的目录（新目录下）

mkdir -p ../build

make ARCH=arm O="$PWD/../build" multi_v7_defconfig fragment*.config

for f in `ls -1 ../fragment*.config`; do scripts/kconfig/merge_config.sh -m -r -O $PWD/../build $PWD/../build/.config $f; done

yes '' | make ARCH=arm oldconfig O="$PWD/../build"

6、编译内核到构建目录上

$> cd <build directory>

    * Build kernel images (uImage and vmlinux) and device tree (dtbs)

    $> make ARCH=arm uImage vmlinux dtbs LOADADDR=0xC2000040

    * Build kernel module

    $> make ARCH=arm modules

    * Generate output build artifacts

    $> make ARCH=arm INSTALL_MOD_PATH="$PWD/../build/install_artifact" modules_install

    $> mkdir -p $PWD/../build/install_artifact/boot/

 $> cp $PWD/../build/arch/arm/boot/uImage $PWD/../build/install_artifact/boot/

$> cp $PWD/../build/arch/arm/boot/dts/st*.dtb $PWD/../build/install_artifact/boot/

7、通过网络更新

* kernel + devicetree

    $> cd <path to install_artifact dir>/install_artifact

    $> ssh root@<ip of board> mount <device corresponding to bootfs> /boot

    $> scp -r boot/* root@<ip of board>:/boot/

    $> ssh root@<ip of board> umount /boot

* kernel modules

    $> cd <path to install_artifact dir>/install_artifact

    Remove the link on install_artifact/lib/modules/<kernel version>/

    $> rm lib/modules/<kernel version>/source lib/modules/<kernel version>/build

    Optionally, strip kernel modules (to reduce the size of each kernel modules)

    $> find . -name "*.ko" | xargs $STRIP --strip-debug --remove-section=.comment --remove-section=.note --preserve-dates

    Copy kernel modules:

    $> scp -r lib/modules/* root@<ip of board>:/lib/modules/

    Generate a list of module dependencies (modules.dep) and a list of symbols

    provided by modules (modules.symbols):

    $> ssh root@<ip of board> /sbin/depmod -a

    Synchronize data on disk with memory

    $> ssh root@<ip of board> sync

 Reboot the board in order to take update into account

    $> ssh root@<ip of board> reboot

修改配置内核：

https://wiki.st.com/stm32mpu/wiki/Menuconfig_or_how_to_configure_kernel#Menuconfig_and_Developer_Package

https://wiki.st.com/stm32mpu/wiki/How_to_cross-compile_with_the_Developer_Package#Modifying_the_Linux_kernel_device_tree所有步骤链接

cd <build-path>

make arch = ARM savedefconfig 保存初始配置

结果存储在defconfig文件中

PC $> cp defconfig defconfig.old

make menuconfig 配置内核

例如配置cma

dmesg | grep -i cma 查看初始大小

Navigate to "Device Drivers - Generic Driver Options"

select "Size in Megabytes"
modify its value to 256
exit and save the new configuration
Check that the configuration file (.config) has been modified

PC $> grep -i CONFIG_CMA_SIZE_MBYTES .config
CONFIG_CMA_SIZE_MBYTES=256

配置完成后

通过比较新的defconfig和旧的defconfig来检索配置更新（meld未发现则安装sudo apt-get install meld）

meld defconfig defconfig.old

PC $> make arch = ARM uImage LOADADDR = <内核的loadaddr>

PC $> cp arch/arm/boot/uImage install_artifact/boot/

更新板载Linux内核映像

PC $> scp install_artifact /boot/uImage root@<板ip地址>：/boot/

Board $> cd /boot; sync; systemctl reboot

同步、重启

dmesg | grep -i cma