[U-Boot-Users] IVT on 405GP
wd at denx.de
Wed Apr 16 22:46:53 CEST 2003
In message <EGEGIJHKDKJGAJMGIDPNOEPICKAA.jwalden at digitalatlantic.com> you wrote:
> Thanks for the response. I think my problem may be the base uboot address.
> address is 0x3fcf000. The mask is 3fff. If my uboot started on a nice 16 bit
> address then the result would be 0(3fc0000 & 3fff) but I was getting
> 0xf000(3fcf000 & 3fff). So I think that the fix is to move uboot down to
> 0x3fc0000 or 0x3fc8000.
I have warned often enough NOT to try to start U-Boot from RAM unless
you know _EXACTLY_ what you are doing.
You tried, and you failed. You kind of got what you deserved ;-)
Put U-Boot in flash, and start it from the reset entry point like it
was designed for, and everything will be fine.
Actually I have to admit that I don't remember why the target address
was computed using "& 3fff" instead of a hard-wired 0x100. I don't
even remember where I got this code fragment from.
A similar assumption is buried in the code relocation stuff - see
llandre's problem when setting CFG_MONITOR_BASE to a value that was
not a multiple of 16 k.
We probably should get rid of this ASAP.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
How does a project get to be a year late? ... One day at a time.
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