On 2012-05-03 04:22, giovanni.pav...@exorint.it wrote:
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?
Why not use an 'initrd' image + kernel instead? It's much simpler
to build and U-Boot has good support for this. I use this method
all the time for just the scenario you mention.
--
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Gary Thomas | Consulting for the
MLB Associates | Embedded world
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