Kernal Panic - Not Syncing : VFS:

This is problem .....I,m using Altera Nios ii board .....i'm getting through serial uart.....

:ph34r: :ph34r: :ph34r: :ph34r: :ph34r:

Uncompressing Linux... Ok, booting the kernel.

Linux version 2.6.25-uc0 (root@localhost.localdomain) (gcc version 3.4.6)# 15 PR

EEMPT Sat Jul 25 05:15:30 IST 2009

uClinux/Nios II

Altera Nios II support © 2004 Microtronix Datacom Ltd.

Built 1 zonelists in Zone order, mobility grouping off. Total pages: 8128

Kernel command line:

PID hash table entries: 128 (order: 7, 512 bytes)

console [ttyS0] enabled

Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)

Inode-cache hash table entries:

Memory available: 30708k/1760k RAM, 0k/0k ROM (1510k kernel code, 249k data)

Mount-cache hash table entries: 512

net_namespace: 144 bytes

NET: Registered protocol family 16

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 1024 (order: 1, 8192 bytes)

TCP bind hash table entries: 1024 (order: 0, 4096 bytes)

TCP: Hash tables configured (established 1024 bind 1024)

TCP reno registered

io scheduler noop registered

io scheduler deadline registered (default)

NIOS serial driver version 0.0

ttyS0 (irq = 4) is a builtin NIOS UART

smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <nico@cam.org>

eth0: SMC91C11xFD (rev 2) at 82110300 IRQ 6 [nowait]

eth0: Ethernet addr: 00:07:ed:0f:b8:f7

TCP cubic registered

NET: Registered protocol family 1

NET: Registered protocol family 17

RPC: Registered udp transport module.

RPC: Registered tcp transport module.

List of all partitions:

No filesystem could mount root, tried:

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

What is the solution .....?

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Regards

Vivek