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Created How to compile DevTerm CM3 Kernel (markdown)

GNU 2021-09-02 12:24:02 +08:00
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How-to-compile-DevTerm-CM3-Kernel.md Normal file

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## Get kernel
1. git://github.com/raspberrypi/linux.git
1. git checkout remotes/origin/rpi-4.19.y
1. git apply devterm-4.19_0601.patch
## Compile
```
KERNEL=kernel7 make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcm2709_defconfig
KERNEL=kernel7 make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j3
export INSTALL_MOD_PATH=./modules
rm -rf $INSTALL_MOD_PATH
make modules_install
rm $INSTALL_MOD_PATH/lib/modules/*/build
rm $INSTALL_MOD_PATH/lib/modules/*/source
```
## copy kernel to SD card
$1 is the sd card location (mount point)
```
export INSTALL_MOD_PATH=./modules
sudo cp -r $INSTALL_MOD_PATH/lib/modules $1/rootfs/lib/
cat config_a >> $1/boot/config.txt
cp arch/arm/boot/zImage $1/boot/kernel7.img
cp arch/arm/boot/dts/bcm2710-rpi-cm3.dtb $1/boot/bcm2710-rpi-cm3.dtb
cp arch/arm/boot/dts/overlays/*.dtbo $1/boot/overlays/
```