Hi Dave, 

You need to remove the ide and ethernet devices from the
VExpress_EMM config in src/dev/arm/RealView.py. Hopefully there will be
instructions on how to compile a kernel with PCIe support soon that will
make use of these devices. 

Thanks, 

Ali 

On 27.06.2012 10:21, David
Roberts wrote: 

> Hello,
> 
> I tried booting the large-memory ARM
platform and kernel with the latest gem5 dev source code. The boot
process dies with a "cannot open root device" error. I used the
unmodified arm-ubuntu-natty-headless.img disk image. Any suggestions?
Thanks!
> 
> My command line is;
> 
> ./build/ARM/m5.opt
configs/example/fs.py --machine=VExpress_EMM
--kernel=vmlinux.arm.smp.fb.3.2
> 
> Terminal output is;
> 
> Kernel
command line: earlyprintk console=ttyAMA0 lpj=19988480 norandmaps rw
loglevel=8 mem=1024MB root=/dev/sda1
> ...
> Root-NFS: no NFS server
address
> VFS: Unable to mount root fs via NFS, trying floppy.
> VFS:
Cannot open root device "sda1" or unknown-block(2,0)
> Please append a
correct "root=" boot option; here are the available partitions:
> Kernel
panic - not syncing: VFS: Unable to mount root fs on
unknown-block(2,0)
> [] (unwind_backtrace+0x0/0xf8) from []
(panic+0x64/0x190)
> [] (panic+0x64/0x190) from []
(mount_block_root+0x194/0x238)
> [] (mount_block_root+0x194/0x238) from
[] (mount_root+0xe8/0xf0)
> [] (mount_root+0xe8/0xf0) from []
(prepare_namespace+0x150/0x18c)
> [] (prepare_namespace+0x150/0x18c)
from [] (kernel_init+0x170/0x174)
> [] (kernel_init+0x170/0x174) from []
(kernel_thread_exit+0x0/0x8)

 
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