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Re: ROMable Code Still having problems
- From: ken king <kknhuntsville at yahoo dot com>
- To: ecos-discuss at sources dot redhat dot com
- Date: Wed, 18 May 2005 13:54:04 -0700 (PDT)
- Subject: Re: [ECOS] ROMable Code Still having problems
It seems to stop or hang-up while coping FLASH to RAM
after the 1st word is copied (I started with the adder
code).
Actually, sometimes it just stops -- no bus activity.
I found this in variant.inc
.macro hal_cpu_init
# Disable special MPC8xx "development support"
which
# suppresses trace exceptions. The CPU seems to hang,
not
# executing from offset 0x1e00(?) as expected.
lwi r3,0x00000007
mtspr ICTRL,r3
li r3,0
mtspr DER, r3
If I change the 0x7 to a 0 -- it starts to write to
the terminal before "stopping".
Anybody remember this??
--- ken king <kknhuntsville@yahoo.com> wrote:
> I have a MPC852T custom bd I've been running
> with a BDM. Most every thing is working.I tried to
> make this system boot from FLASH.
>
> Okay, it works with a BDM connected, with *almost*
> no .gdbinit -- i.e. only target type and
> remote (IP:Port) (just enough to connect) -- no
> monitor or set commands -- no program load!
>
> I can disconnect the BDM after it boots,
> everything keeps running fine.
>
> Question is; what module might I have forgotten to
> load that gdb/BDM might be handling for me???
>
> I've single stepped through hal_hardware_init,
> everything looks fine. /CS init, copy ROM to RAM,
> etc.
>
> Looked at the ROM /CS with and without the BDM with
> scope, signature looks about the same -- ?burst of
> copy? ROM to RAM.
>
> I know that *part* of hal_hardware_init works,
> because the clocks change to the right frequency.
>
> I don't *think* CPU is going into debug mode as
> VFLS{0..1] were never seen to both be asserted.
>
> Any ideas?
>
> TIA,
> KK
>
>
>
>
>
>
>
>
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