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Kernel compilation


This is a short guide to compile your own kernel based on the released kernel source by Toshiba. It is assumed that you have the the toolchain (from installed or compile native. First, get the source by either downloading from or apply the attached patch to the eclair-9.12.13 branch, tegra-9.12.12 tag of [Optional] If you intend to spend a lot of time using the framebuffer console, now would be a good time to patch it

Copy the output of zcat /proc/config (on your ac100) to .config inside the kernel dir. If required (non native), add the toolchain path to PATH, e.g. export PATH=$PATH:~/android/android/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/bin.

Now cd into the kernel tree and invoke something like:

# make oldconfig zImage ARCH=arm CROSS_COMPILE=arm-eabi-

You'll find you newly backed kernel inside the arch/arm/boot directory.


For some reasons, the kernel version string misses the -svn1996 string. I just symlinked the /lib/modules/2.6.29-arm2-svn1996 to 2.6.29-arm2 to be able to load the modules on boot. You could have changed the .config also in the steps before, if I had told you earlier.

Extract the initrd from your boot.img (e.g. tegra-autodetect-boot.img) Repack it with the following command: ~/android/android/out/host/linux-x86/bin/mkbootimg –kernel ac100-kernel-tree/arch/arm/boot/zImage –ramdisk ~/android/bootimages/initrd.cpio.gz –cmdline 'mem=448M@0M nvmem=64M@448M vmalloc=320M video=tegrafb console=tty0 usbcore.old_scheme_first=1 tegraboot=sdmmc tegrapart=recovery:300:a00:800,boot:d00:1000:800,mbr:1d00:200:800' -o ~/android/newboot.img flash the image using nvflash

kernelcompilation.txt · Last modified: 2011/08/11 18:41 by ggrandou