Op 26-10-2019 om 11:46 schreef JH:
Hi,
I finally built the
zImage->zImage--4.19.75+git0+d573e8a79f-r0-20191026074920.bin and
zImage-initramfs ->
zImage-initramfs--4.19.75+git0+d573e8a79f-r0-20191026074920.bin based
on oe-core kernel.bbclass.
The zImage could be loaded by u-boot on RAM booting but failed at
mount rootfs which was fine as it did not bundle the rootfs. The
zImage-initramfs bundled to rootfs, but it could not be started and
stuck at u-boot Starting kernel, there was no trace of errors.
Hit any key to stop autoboot: 0
=> bootz ${loadaddr} - ${fdt_addr}
Kernel image @ 0x80800000 [ 0x000000 - 0x219df80 ]
## Flattened Device Tree blob at 83000000
Booting using the fdt blob at 0x83000000
Using Device Tree in place at 83000000, end 83008831
ft_system_setup for mx6
Starting kernel ...
Because zImage could be started, zImage-initramfs could not, that
implies there were no issues in the u-boot, is must be something wrong
with the zImage-initramfs. Seems debug is harder, are there anyway to
extract information from zImage-initramfs to figure out what is wrong?
As an example you might want to look at my repo, I have 2 images minimal
and initramfs:
https://github.com/edison-fw/meta-intel-edison/tree/master/meta-intel-edison-distro/recipes-core/images
I don't exactly know how you are doing it. But I'll try to explain what
I do:
I have
1) a normal rootfs (say edison-image-minimal) and
2) a initramfs rootfs containing kernel modules needed for booting and a
init script.
Initramfs is build using core-image-minimal-initramfs.bbappend. Some
additional unneeded packages are pulled, and as size is restricted (10MB
or so?) we remove them here.
The init script is here:
https://github.com/edison-fw/meta-intel-edison/blob/master/meta-intel-edison-distro/recipes-core/initrdscripts/initramfs-framework/init
The init script loads modules, waits for the disk with the rootfs to
appear and mount it. Then switchroot to it.
If it doesn't appear it drops to a shell so you can investigate what's
wrong.
To build everything edison-image-minimal triggers build of u-boot,
kernel, rootfs, initramfs and kernel-with-built-in-initramfs.
Search for 'init' and 'live' and find the needed lines in
https://github.com/edison-fw/meta-intel-edison/blob/master/meta-intel-edison-distro/recipes-core/images/edison-image-minimal.bb
Thank you.
Kind regards,
- jh
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