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xen-ppc-devel
Re: [XenPPC] JS21 serial port address
On Fri, 2006-05-26 at 00:57 +0200, Segher Boessenkool wrote:
> > We are currently having troubles locating the serial port address
> > on the JS21.
> >
> > The machine has two serial ports one at address 2f8 and the other
> > at 3f8 both off the isa bus.
>
> Those addresses are configurable, actually.
>
> > We believe that 3f8 is wired to serial over lan.
>
> The first port goes to SoL, the second goes to the debug port.
>
> > Thanks to a very enterprising colleague we have wired the port at
> > 2f8 to a real serial cable.
>
> "Real" serial cable. Have you looked at the wiring diagram? It is...
> interesting. It can be auto-detected though, what a normal serial cable
> can not; and SLOF is supposed to use that to automatically configure to
> use the debug port if a cable is attached, SoL otherwise.
>
Our SLOF image uses the real serial port, but also duplicates all output
to the SOL port.
Thus the setting of /chosen/stdout is correct, but given that output is
duplicated setting it to the 2f8 port would be correct too.
--
Michal Ostrowski <mostrows@xxxxxxxxxxxxxx>
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