Floating point error on a MPC8280 based board

annamaya annamaya at yahoo.com
Sat Oct 16 11:03:03 EST 2004

Thanks for the reply Dan. I see it clearly now. I
think I need to visit my optometrist again. The pc is
set to 0xff000104 but the flash is mapped at
0xfff00000 and the default vector is going to be
0xfff00100. I need to look at the reset code just as
you suggested. I was stumped by the "floating point"
error since that was not something I expected on a bad
instruction fetch.

--- Dan Malek <dan at embeddededge.com> wrote:

> On Oct 15, 2004, at 4:59 PM, annamaya wrote:
> > When I try to reboot my system on a MPC8280 eval
> > board, I see the floating point error. Does anyone
> > know why is this happening?
> It's trying to jump to a restart location in the
> boot rom.
> It fetches a bad instruction that attempts to
> execute
> as a floating point instruction.
> > bash-2.05b# reboot -f
> > Restarting system
> > floating point used in kernel (task=cf458000,
> > pc=ff000104)
> This program counter is a typical warm restart boot
> rom location.  Change the kernel reboot code to jump
> to the proper place in your boot rom or force a
> restart
> in some way.
> 	-- Dan

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