Bug#469030: debian ppc64 not booting after install

[Ulrich Enslin <ulrichenslin@gmail.com>]

Package: debian-40r3-powerpc-businesscard.iso
Version: 40r3 powerpc64

Description:

I installed debian 40r3 on a IBM Power 620 (7025-f0).  The install was 
successful, but the system did not boot from the scsi disc, with the output 
shown below.

Boot messages:

Welcome to yaboot version 1.3.13
Enter "help" to get some basic usage information
boot:
 Linux                      old
boot: Linux
Please wait, loading kernel...
  Elf32 kernel loaded...
Loading ramdisk...
ramdisk loaded at 02200000, size: 5264 Kbytes
OF stdout device is: /pci@fff7f09000/isa@10/serial@i3f8
command line: root=/dev/sda4 ro console=ttyS0
memory layout at init:
 alloc_bottom : 02724000
 alloc_top    : 00000000
 alloc_top_hi : 00000000
 rmo_top      : 00000000
 ram_top      : 00000000
Looking for displays
alloc_down() called with mem not initialized
EXIT called ok
0 >