Building Linux kernel (DIVELK)

Info Box Applies to Diva

History

Version	Date	DIVELK version	Notes
3.0.0	Jun 2017	DIVELK 3.0.0	DIVELK release
4.0.1	Mar 2019	DIVELK 4.0.1	DIVELK release

Quick reference

Repository Information

URL	git@git.dave.eu:dave/diva/linux-am33x.git
stable branch	diva
stable tag	divelk-4.0.1

Build Information

defconfig	diva_defconfig
Kernel binary	UIMAGE_LOADADDR=0x80008000 uImage
Device trees	Platform	SOM ConfigID	CB ConfigID	DTB
	DIVELK	0x00000001	0x00000001	am335x-divelk.dtb
	SBCD	0x00000001	0x00000002	am335x-sbcd.dtb

Detailed Instructions

It is assumed that the development environment has been set up properly as described here.

• start the Linux development VM and login into the system
• open a terminal window and cd into Linux kernel source code

cd diva/linux/

• in case of needs you can update your local repository with the following git command

git pull

• configure the build environment

source ~/env.sh

• to build the binaries run the following commands:

make diva_defconfig
make LOADADDR=0x80008000 uImage am335x-divelk.dtb am335x-sbcd.dtb

The former command selects the default DIVELK configuration, while the latter builds the kernel binary image with the required u-boot header and the kernel device tree.

Default Linux kernel configuration can be changed by using the standard menuconfig, xconfig, or gconfig make target. Subsequent builds just require uImage make target to update the binary image. Once the build process is complete, the kernel binary image is stored into the arch/arm/boot/uImage file. Both this file and the kernel device tree can be copied to the tftp root directory /tftpboot/diva/ with the following commands:

cp arch/arm/boot/uImage /tftpboot/diva/
cp arch/arm/boot/dts/*.dtb /tftpboot/diva/