Thank you for your reply Wolfgang!
In u-boot-1.1.4 README Where we come from section, it says u-boot provide
extended interface to Linux boot loader. Does it mean that there is still
some sort of boot loader in arch/ppc/coffboot/vmlinux.gz ? If yes, when
does it start? Does it boot the kernel?
To build u-boot, I will need to get the manual for MPC852 and check the
configurations in include/configs/TQM860L.h file.
I am trying to find the machine specific header file in linux-2.4.25
(include/asm-ppc/tqm8xx.h file in linux-2.4.4) which should have the same
definition of structure bd_info as in include/asm-ppc/u-boot.h. And you
recommend using linux-2.4 instead of linux-2.6 on your website.
So am I heading the right directions here? Because the u-boot README
doesn't have the new directories and filenames, I am a little confused.
Thanks again,
Jessica
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
Both PPCBoot and Linux 2.4.4 are *hoplessly* obsolete. It may be ok
to study this to understand the workings, but please don't even dream
of using it for any current work.
the future. In the build process, they use the zImage.initrd
(arch/ppc/mbxboot/zvmlinux.initrd) instead of the raw Linux kernel image
Somebody didn't know what he was doing, it seems.
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?
The Linux bootstrap loader code (arch/ppc/mbxboot) will ignore the
parameteres passed by U-Boot, will set up is own (hardwired), and
duplicate some of the things that PPCboot did or would do.
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.
Don't change anything. Look at it, then drop it. Start using current
code, i. e. a recent version of U-Boot and a recent Linux kernel.
