Linux on Virtex board with ARCH=powerpc
petermendham at computing.dundee.ac.uk
Wed Jul 2 18:49:38 EST 2008
Peter Korsgaard wrote:
> Peter> I now have a new and rather bizarre problem, which maybe you
> Peter> or someone else has met before. I have a simple FPGA design
> Peter> with memory, a sysace and a uart16550 on an ML405 (I've put my
> Peter> hardware to one side for the moment). It works just fine. If
> Peter> I swap the uart16550 for a uartlite (remaking the kernel with
> Peter> the correct device tree) I see all the boot messages and the
> Peter> kernel seems to start OK, the root partition is mounted but
> Peter> then I see nothing from /sbin/init. This is the same root fs
> Peter> that I was using with the uart16550 example I just mentioned.
> Did you remember to change your inittab to use /dev/ttyUL0?
Yes, I'm using a buildroot/busybox system and have changed inittab and
securetty for ttyUL0. From what I understand, initialisation lines in a
busybox inittab that do not specify a tty at the beginning go out on
/dev/console. To collaborate this, if I set my hardware up for a
uart16550 and leave the inittab specifying ttyUL0, I see the messages
from the init scripts (which must be going to console) but then I
messages (again on console I guess) saying that ttyUL0 doesn't exist.
When I try things the other way round, I don't see anything at all (none
of the stuff that I think is going to console) and it doesn't moan at
me. Which I guess means something is wrong with /dev/console?
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