[U-Boot] Auto Boot ELF image using NFS

[Zvi Vered]

Hello,

I want to boot vxworks with uboot 1.3.4 using nfs.

After I got the prompt I wrote <nfs>+<Entetr> and then <elfboot>+<Enter>

and vxworks was launched. 

How can I do it upon completion of countdown after running uboot like with "tftpboot".

I tried the following:

#define CONFIG_BOOTDELAY 3
#define CONFIG_BOOTCOMMAND "nfs"

But this is not enough. I should also run bootelf. How can I add "bootelf" to CONFIG_BOOTCOMMAND  ?

Thanks.