Serial Console / Booting Linux with the PPCbug on MVME2100?

okorpil at okorpil at
Wed Mar 31 22:08:45 EST 2004


I'm currently trying to boot Linux 2.4.25 on a Motorola VME 2100 board,
featuring a MPC8240 controller.

I want to use the PPCbug monitor to boot Linux via TFTP - the download
step completes successfully:

Network Booting from: DEC21143, Controller 0, Device 0
Device Name: /pci at fec00000/pci1011,19 at e,0:0,0
Loading: images/zImage-2.4.25.prep

Client IP Address      =
Server IP Address      =
Gateway IP Address     =
Subnet IP Address Mask =
Boot File Name         = images/zImage-2.4.25.prep
Argument File Name     =

Network Boot File load in progress... To abort hit <BREAK>

Bytes Received =&954298, Bytes Loaded =&954298
Bytes/Second   =&954298, Elapsed Time =1 Second(s)

Residual-Data Located at: $01F5511C

And then the system seems to hang - it will no longer react to the ABT
(ABORT) interrupt switch, and will only work again on a cold reset (RST).

PreP Netboot is enabled in the ENV of the PPCbug.

The kernel has the following command line args compiled in:
Initial kernel command string:
"console=ttyS0,9600 root=/dev/nfs
nfsroot= ip="

(without the wraparound, of course)

Serial console support is builtin, no PMC VGA controller is onboard.

Why don't I at least get a serial console output??

Thanks a lot in advance,
Oliver Korpilla
CS student at the University of Applied Sciences at Landshut, Germany

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