thanx all for ur kind help...the problem was neither due to Memory Mapping nor CRC check...

I tried the same old routine method of debugging, which is the best...

It was all due to the assignment statement in devices_init( ) in devices.c

"gd->flags |= ".....

which is declared using DECLARE_GLOBAL_DATA_PTR in asm/global_data.h

Well as of now i have commented that, and my board seems to boot fine...

But while loading Linux....phew!!! Have a look below...

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

:>tftpboot
ARP broadcast 1
ARP broadcast 2
TFTP from server 192.168.6.200; our IP address is 192.168.6.221
Filename 'vmlinuz-2.4.4.n2'.
Load address: 0x100000
Loading: #################################################################
         #################################################################
         #
done
Bytes transferred = 666865 (a2cf1 hex)
:>bootm
## Booting image at 00100000 ...
   Image Name:   Linux 2.4.4 (allfs)
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    666801 Bytes = 651.2 kB
   Load Address: 00000000
   Entry Point: 00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Now my system hangs.....Any guesses guys....?????

Again, i have already started looking into to Kernel using grep and xargs......thanx to Jerry and Marius ..