[U-Boot-Users] PPC 8260 Linux boot
wd at denx.de
Mon Jul 26 19:02:16 CEST 2004
In message <4105294D.5070508 at helicontech.co.il> you wrote:
> I am trying to boot Linux 2.4.25 (code from denx linux-2-4-devel)
> The board is similar to MPC8260ADS
Arghh... A description like this is absolutley useless, and
misleading. Your probably even fooling yourself. Similar? In that it
uses the same processor? Or is everything IDENTICAL?
> What happens is that the kernel is starting but after a short while gets
> an exception and the board is reset again.
Please define "after a short while". Do you see any boot messages on
the console? Do you see any messages when you do a post mortem dump
of the log_buf memory?
> We tried looking at the kernel sources to see where we get, we did this
> by lighting hardware LEDS we have on the board.
I see. Please remove ALL this code and try again. perhaps it is just
your debugging code which crashes the system. [This has been
discussed before, both here and in the linuxppc mailing lists. Search
> We tried to find where in the kernel we get the exception, we could not
> find exactly where it happens, but we did find that it happens somewhere
> in the function prom_init called from early_init inside
> Does anyone have any idea what we should look next?
OK, I'll give you two hints:
1) get yourself a BDI2000. You will need it.
2) Check your memory map, and the init sequence of your SDRAM [no,
I'm not going to explain this here again. Search the archives.]
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
And now remains That we find out the cause of this effect, Or rather
say, the cause of this defect... -- Hamlet, Act II, Scene 2
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