[U-Boot] VxWorks Booting using U-boot as Bootloader

[Ashish Khetan]

Hi,
I was trying to boot vxworks using u-boot bootloader for learning purpose
on MPC8640DHPCN board. Previously I successfully ported QNX os along with
linux on same board using u-boot. while booting using bootvx command its
not booting and stucking after showing the following message:

tftp 01000000 vxWorks
Speed: 1000, full duplex
Using eTSEC1 device
TFTP from server 192.168.10.2; our IP address is 192.168.10.4
Filename 'vxWorks'.
Load address: 0x1000000
Loading: *#################################################################
     #################################################################
     #################################
     12.3 MiB/s
done
Bytes transferred = 2392432 (248170 hex)
BOSSv2.0=> bootvx 0010   1000000
## Ethernet MAC address not copied to NV RAM
## Using bootline (@ 0x4200): root=/dev/nfs rw
nfsroot=192.168.10.2:/opt/eldk-5.3/powerpc/rootfs-basic
ip=192.168.10.4:192.168.10.2:192.168.10.1:255.255.255.0:Boss:eth0:off
panic=1 console=ttyS0,115200
## Starting vxWorks at 0x00100000 ...


please somebody provide me some link or any pointer to help me get more
understanding about booting multiple os using uboot.