topic Build Linux kernel manually in Yocto project for LS2080A in Layerscape

Build Linux kernel manually in Yocto project for LS2080A

thomasculverhou — Tue, 31 May 2016 09:42:01 GMT

I want to be able to build the linux kernel for my LS2080A RDB manually from within the Yocto project.

Following the Freescale Yocto Project Quick Start Guide, if I do

bitbake -c cleansstate virtual/kernel

bitbake -c compile virtual/kernel

I get a directory tmp/work-shared/ls2080ardb/kernel-source which is filled with all the kernel source code, a Makefile and so on.

Within the kernel-source directory, normal kernel compilation would allow something like

make ARCH=arm64 CROSS-COMPILE=/path/to/cross/compiler/aarch64-fsl-linux- vmlinux

but this gives errors when I run it.

Can anyone point to how I can build the kernel manually? Better still, how can I build the kernel completely outside the Yocto project?

Re: Build Linux kernel manually in Yocto project for LS2080A

yipingwang — Thu, 02 Jun 2016 08:37:16 GMT

Hello Thomas Culverhouse,

Please run the following commands to get the clean Kernel source.

$ bitbake virtual/kernel -c cleansstate

$ bitbake virtual/kernel -c patch -f

Get the Kernel source in build_<platform>_release/tmp/work/<platform>-fsl-linux/linux-ls2-sdk/4.1-r0/git.

Configure Kernel with menuconfig.

Go to Kernel source folder.

$cp arch/arm64/configs/defconfig .config

$ make ARCH=arm64 menuconfig

Assume Toolchain is installed in /opt/fsl-networking/LS2080A-SDK/sysroots/x86_64-fsl-linux/usr/bin/aarch64-fsl-linux/.

Build Kernel image with the following commands.

$ make ARCH=arm64 CROSS_COMPILE="/opt/fsl-networking/LS2080A-SDK/sysroots/x86_64-fsl-linux/usr/bin/aarch64-fsl-linux/aarch64-fsl-linux-" LD=aarch64-fsl-linux-ld.bfd

Have a great day,
Yiping

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Re: Build Linux kernel manually in Yocto project for LS2080A

thomasculverhou — Wed, 08 Jun 2016 13:13:02 GMT

Hi Yiping,

Can you please update these instructions to work with the NXP Linux SDK v2.0 released last month? These instructions are for v1.0.

Kind regards,

Tom

Re: Build Linux kernel manually in Yocto project for LS2080A

thomasculverhou — Wed, 08 Jun 2016 14:08:14 GMT

Also, can you please give instructions for building u-boot from source?

Thanks,

Tom