ep440xs board boot problem

Tirumala Reddy Marri tmarri at amcc.com
Tue Dec 1 16:49:55 EST 2009

It could be ramdisk size issue.  if it is bigger than 4MB you might have to pass ramidisk_size=100000 (100MB or > your ramdisk size).

-----Original Message-----
From: linuxppc-dev-bounces+tmarri=amcc.com at lists.ozlabs.org [mailto:linuxppc-dev-bounces+tmarri=amcc.com at lists.ozlabs.org] On Behalf Of Allan Wang
Sent: Monday, November 30, 2009 9:35 PM
To: linuxppc-dev at lists.ozlabs.org
Subject: ep440xs board boot problem

Hello, All,

I am new to the list. I am still newbie to embedded linux. I have bought an ep440xs board which is similar to sequoia board. u-boot is working. I am trying to make it run linux.  I have the following problems and need your help. Thank you very much:

I am using linux kernel I encounter 2 problems:
1. After console_init() is called inside start_kernel(), the console starts printing garbage like:
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
serial8250.0: ttyS0 at MMIO 0x1ef600300 (irq = 16) is a 16550A
2. It pakics when mounting the root file system(NFS):
(gdb) bt
#0  panic (fmt=0xc0290e94 "VFS: Unable to mount root fs on %s")
at kernel/panic.c:70
#1  0xc02d8ce0 in mount_block_root (name=0xc0290de4 "/dev/root", flags=0x8001)
at init/do_mounts.c:272
#2  0xc02d9084 in prepare_namespace () at init/do_mounts.c:415
#3  0xc02d81ec in kernel_init (unused=<value optimized out>) at init/main.c:885
#4  0xc000de60 in kernel_thread ()
There is a patch for Sequoia board to delete /chosen part in sequoia.dts, is /chosen required?


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