[yocto] Need help for building kernel image with embedded initramfs.cpio

[giovanni.pavoni at exorint.it]

Dear Sirs,

for my cortex A8 based system, I am in the need to deploy 
a sort of "safe mode image" that should bootstrap only 
in case of system recovery. 

This image fits particularily well the model of a ramfs based system
with contents such as core-image-minimal-mtdutils plus some tools 
addition.

I defined a "myimage.bb" recipe for this image that generates a 
"myimage.cpio"

However I am in the need to:

1. establish in myimage.bb a relation with virtual/kernel and ask to 
generate
kernel modules only.

2. retrieve modules only from the kernel staging area and made them part 
of 
"myimage.cpio"

3. change the config of my kernel to add CONFIG_INITRAMFS_SOURCE = 
"myimage.cpio"
and copy myimage.cpio from staging area to kernel build location.

4. build kernel and deploy the emitted uImage as "mykernel+myimage"

Anyone can help with suggestions/guidelines and/or codesnips?

Kind regards



Giovanni Pavoni
R&D Department

Exor International S.p.A.
Via Monte Fiorino,9
I-37057 San Giovanni Lupatoto (VR)
Phone:+390458774839 - Fax:+390458779023

giovanni.pavoni at exorint.it - www.exorint.net - www.exorint.it



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