MPC832xEMDS: ttyS0 output stops mid boot

[Alex Zeffertt <ajz@cambridgebroadband.com>]

Hi,

Sorry about the cross posting, but I'm not sure which list I should send to....

I'm trying to boot an up-to-date kernel on my MPC8323E-MDS-PB board, but I the
console output stops early on during the kernel boot.

I'm running the latest u-boot (git://www.denx.de/git/u-boot-mpc83xx.git) with
its default environment.  The kernel is built from Paulus' powerpc.git, after
checking out tag 2.6.21-rc5.  The dtb is build from
arch/powerpc/boot/dts/mpc832x_mds.dts
with the latest compiler (git://www.jdl.com/software/dtc.git).

Has anyone else been here before...?  If so I'd appreciate any help you can
offer.

TIA,

Alex

-------------------my ttyS0 output------------------
=>
=> printenv
bootcmd=setenv bootargs root=/dev/nfs rw nfsroot=$serverip:$rootpath
ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname:$netdev:off
console=$consoledev,$baudrate $othbootargs;tftp $loadaddr
$bootfile;tftp $fdtaddr $fdtfile;bootm $loadaddr - $fdtaddr
ramboot=setenv bootargs root=/dev/ram rw console=$consoledev,$baudrate
$othbootargs;tftp $ramdiskaddr $ramdiskfile;tftp $loadaddr
$bootfile;tftp $fdtaddr $fdtfile;bootm $loadaddr $ramdiskaddr $fdtaddr
nfsboot=setenv bootargs root=/dev/nfs rw nfsroot=$serverip:$rootpath
ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname:$netdev:off
console=$consoledev,$baudrate $othbootargs;tftp $loadaddr
$bootfile;tftp $fdtaddr $fdtfile;bootm $loadaddr - $fdtaddr
bootdelay=6
baudrate=115200
loads_echo=1
ethaddr=00:04:9f:ef:03:01
eth1addr=00:04:9f:ef:03:02
loadaddr=200000
netdev=eth0
consoledev=ttyS0
ramdiskaddr=1000000
ramdiskfile=ramfs.83xx
fdtaddr=400000
fdtfile=mpc832xemds.dtb
stdin=serial
stdout=serial
stderr=serial
ethact=FSL UEC0

Environment size: 979/8188 bytes
=> setenv ramdiskfile uRamdisk
=> setenv fdtfile mpc832x_mds.dtb
=> setenv bootfile uImage
=> setenv serverip 10.0.0.107
=> setenv ipaddr 10.0.6.65
=> run ramboot
Using FSL UEC0 device
TFTP from server 10.0.0.107; our IP address is 10.0.6.65
Filename 'uRamdisk'.
Load address: 0x1000000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         ###########################################################
done
Bytes transferred = 3296770 (324e02 hex)
Using FSL UEC0 device
TFTP from server 10.0.0.107; our IP address is 10.0.6.65
Filename 'uImage'.
Load address: 0x200000
Loading: #################################################################
         #################################################################
         #################################################################
         ##########################################
done
Bytes transferred = 1212615 (1280c7 hex)
Using FSL UEC0 device
TFTP from server 10.0.0.107; our IP address is 10.0.6.65
Filename 'mpc832x_mds.dtb'.
Load address: 0x400000
Loading: ###
done
Bytes transferred = 12288 (3000 hex)
## Booting image at 00200000 ...
   Image Name:   Linux-2.6.21-rc5
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1212551 Bytes =  1.2 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
## Loading RAMDisk Image at 01000000 ...
   Image Name:   uboot ext2 ramdisk rootfs
   Image Type:   PowerPC Linux RAMDisk Image (gzip compressed)
   Data Size:    3296706 Bytes =  3.1 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Booting using flat device tree at 0x400000
   Loading Ramdisk to 07c87000, end 07fabdc2 ... OK
Using MPC832x MDS machine description
Linux version 2.6.21-rc5 (ajz@zambia) (gcc version 3.4.3) #2 Thu May 3
16:42:54 BST 2007
Found initrd at 0xc7c87000:0xc7fabdc2
setup_arch: bootmem
mpc832x_sys_setup_arch()
Found MPC83xx PCI host bridge at 0x00000000e0008500. Firmware bus number: 0->0
arch: exit
Zone PFN ranges:
  DMA             0 ->    32768
  Normal      32768 ->    32768
early_node_map[1] active PFN ranges
    0:        0 ->    32768
Built 1 zonelists.  Total pages: 32512
Kernel command line: root=/dev/ram rw console=ttyS0,115200
IPIC (128 IRQ sources) at fddf3700
QEIC (64 IRQ sources) at fddf2080
PID hash table entries: 512 (order: 9, 2048 bytes)