[U-Boot-Users] Replacing AT91 u-boot

[kentropy]

> Sorry, I missed this.
> Remove the initrd= and mem= part. U-Boot passes correct ATAGS
> to  the kernel.

Thank you again.
I followed your suggestions:

U-Boot> printenv
bootdelay=3
baudrate=115200
ethaddr=00:02:a5:6e:3f:fd
filesize=3638c0
fileaddr=21140000
netmask=255.255.255.0
ipaddr=192.168.0.184
serverip=192.168.0.11
bootargs=root=/dev/ram rw ramdisk_size=15360 console=ttyS0,115200
stdin=serial
stdout=serial
stderr=serial

U-Boot> tftp 21100000 ramdisk
TFTP from server 192.168.0.11; our IP address is 192.168.0.184
Filename 'ramdisk'.
Load address: 0x21100000
Loading: ###
.snip.
########
done
Bytes transferred = 3553472 (3638c0 hex)

U-Boot> tftp 21000000 uImage
TFTP from server 192.168.0.11; our IP address is 192.168.0.184
Filename 'uImage'.
Load address: 0x21000000
Loading: ##############################################
        #######################################
done
Bytes transferred = 646841 (9deb9 hex)

U-Boot> bootm
## Booting image at 21000000 ...
   Image Name:
   Image Type:   ARM Linux Kernel Image (gzip compressed)
   Data Size:    646777 Bytes = 631.6 kB
   Load Address: 20008000
   Entry Point:  20008000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ...

[here is still freezed]

Every test I do I'm more confused.
Please apologize my question, but did you ever used an AT91RM9200DK board with u-boot (reading help and your site seems that you are a PPC expert but there is no examples using AT91) ?
Why Atmel give out and say to use boot.bin as pre-bootloader and you say not ?
Why the u-boot-1.1.3 default configuration for this board don't work ?
Maybe there is something missing or wrong ?
TIA