Port Linux w/ mbxboot to PPCBoot system

[Jessica Chen]

Hi,



     I am new to embedded system, I am studying ppcboot-1.1.5 and linux
kernel-2.4.4 that comes with an mpc852 base board, we want to modify it in
the future.  In the build process, they use the zImage.initrd
(arch/ppc/mbxboot/zvmlinux.initrd) instead of the raw Linux kernel image
(arch/ppc/coffboot/vmlinux.gz) + separate initrd which is the way README
file suggested.



My question is:

since ppcboot is already running, what happens when I boot the kernel that
has old boot loader code in arch/ppc/mbxboot?  Will some parameters be
overwritten?  If not, why?



     I am very tempted to follow the README to re-build the kernel with only
vmlinux.gz and port it, but I don't want to create any un-recoverable
results.  So I am here to seek advice, maybe this is something obvious to
many people.



Thanks in advance,





Jessica Chen