Updating BBB Debian Image With Cross-Compiled Kernel

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1

I have a new BeagleBone Black (rev C) and got it booting from SD with the Debian 4GB SD image from 2015-03-01.

My goal is to cross compile a kernel on my Linux PC and move the necessary files to the Debian SD card.

So… I got the 4.1.1 Linux kernel from here:

git clone git://github.com/beagleboard/linux.git

And then built the new kernel like this from what I gleaned on the web:

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- bb.org_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- uImage am335x-boneblack.dtb LOADADDR=0x80008000
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- modules
mkdir MODULES
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- modules_install INSTALL_MOD_PATH=./MODULES
cd MODULES
tar czf target_modules.tgz lib

Success! Compiled with no errors. Now I have a uImage, a dtb, and a tarball of the modules to move the SD card.
BUT, when I look at the /boot dir on the Debian SD it seems to need vmlinuz and and initrd.

Can someone PLEASE advise on either how to use what I have built, or how to build what I need to update the SD card.
I’m not looking for an automated solution, I would rather understand the details at this point.

Regards,
Jalodi

2

Jalodi:
Here[1] are instructions I’ve used with my class. They are written for the 3.8 kernel, but if you checkout the right branch you can get newer kernels.

The script may_install_kernel.sh can be found in my course repo[2]. It’s based on Robert Nelson’s install_kernel.sh. My approach is to use fuse to mount the Bone’s files on the host where the kernel was compiled, and then copy the needed files as if they are local files.

–Mark

[1] http://elinux.org/EBC_Installing_Kernel_Source
[2] https://github.com/MarkAYoder/BeagleBoard-exercises/tree/master/kernel