uboot + uclinux + nios2

I compiled uboot as well as uclinux for stratix board DK1S40 using standard hardware design for nios2 that comes with web addition software from altera.

when I tried to create an uImage ...running this command.

./mkimage -A nios2 -O linux -T kernel -C gzip -a 0x01000000 -e 0x01000000 "uclinux kernel Image" -d linux.bin.gz uImage

I got an error message........

Invalid CPU Type - valid names are: alpha, arm, x86, ia64, m68k, microblaze, mips, mips64, ppc, s390, sh, sparc, sparc64

Usage: ./mkimage -l image

-l ==> list image header information

./mkimage [-x] -A arch -O os -T type -C comp -a addr -e ep -n name -d data_file[:data_file...] image

-A ==> set architecture to 'arch'

-O ==> set operating system to 'os'

-T ==> set image type to 'type'

-C ==> set compression type 'comp'

-a ==> set load address to 'addr' (hex)

-e ==> set entry point to 'ep' (hex)

-n ==> set image name to 'name'

-d ==> use image data from 'datafile'

-x ==> set XIP (execute in place)

when I looked at the mkimage source code file....I found the nios2 stuff is missing.......

I would really appreciate if someone help me to resolve this issue.

Is anyone knows ......what needs to be done in order to create an uImage for nios2 platform.