linuxppc_2_4_mpc5200 / 5200lite first day conclusions
wd at denx.de
Mon Nov 3 10:30:48 EST 2003
In message <3FA583B6.5040409 at iti.fi> you wrote:
> - It looks like that it is not so easy any more compile non u-boot
> version of kernel. Make zImage gives one compilation error
> mentioned and does not even work after it.
zImage requires a Linux bootstap loader; this has not been
implemented (yet). We use U-Boot so we don't need it.
> ---> Easiest way is to move to u-boot
> - With u-boot Wolfgang Denk give advice to make ram
> loadable version. I just did not find easy instructions
> to make it.
We do NOT recommend to use a U-Boot version booting from RAM; you can
do this if you really want and if you know what you're doing; what we
recommend is to use the standard version and install it instead of
the original bootloader.
> -- Compile u-boot flashable version. Even it
> is vompiled for 0xff800000 base address it looks a like
> that it needs still CFG_RAMBOOT if it is
> started from dbug with go ff800100
Building a low-boot configuration requires more than just modifying
the flash base address.
> - Try to meke your own ramdisk image. There is still
> in uboot manual pages just mentioned "old wau" , read
> kernel Documentation/initrd.txt . The way i used
> to do it does not work any more. uboot just saus
> invalid magic number. Try found out what is wrong
Start reading the U-Boot manual at
You can find pre-built ramdisk images for testing at
ftp://ftp.denx.de/pub/LinuxPPC/usr/src/SELF/images/ (use the ppc_82xx
version for the MPC5200).
> - Got kernel died with "cant fork init",
> -->find out that your old linux kernel utilities, busybox, init
> jne are no longer copmpatible with libraries, make or find new set
You must have done something wrong when building the ramdisk image.
This works fine for me.
> Looks a like that it is doable but it needs lot of time and
> once again "reverse documentation read" that is that found
> first a solution and then you find documentation ......
Please feel free to contribute to the DULG
This is a wiki, so everybody can help improving it.
> May be good step by step instructions are needed someones that
> won't spend all day long hacking
Maybe you can point out what is mussing in the DULG, and we add it?
> -- After midnight you are hungry, tired and five cats and dog are asking
> --> feed them and go to sauna ... ;)
I guess I know how that feels (even without cats or dogs).
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
On the subject of C program indentation: "In My Egotistical Opinion,
most people's C programs should be indented six feet downward and
covered with dirt." - Blair P. Houghton
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