cannot open root device

Hi hippo !

I did :

+ make clean

+ rm -rf romfs

+ make vendor_hwselect SYSPTF=~/...../standard_1c12.ptf

+ make romfs

+ make menuconfig

[*] Default all settings (lose changes)

[ ] Customize Kernel Settings

[ ] Customize Vendor/User Settings

[ ] Update Default Vendor Settings

Then <exit> <exit> <yes>

+ make

+ make linux image .

then I load zImage to board and this is message I got :

uClinux/Nios II

Altera Nios II support © 2004 Microtronix Datacom Ltd.

Built 1 zonelists

Kernel command line:

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

Dentry cache hash table entries: 2048 (order: 1, 8192 bytes)

Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)

Memory available: 14872k/16384k RAM, 0k/0k ROM (1195k kernel code, 157k data)

Mount-cache hash table entries: 512

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: 0, 4096 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)

Serial: JTAG UART driver $Revision: 1.1 $

ttyJ0 at MMIO 0x80801080 (irq = 2) is a jtag_uart

dm9000 Ethernet Driver

TCP bic registered

NET: Registered protocol family 1

NET: Registered protocol family 17

No filesystem could mount root, tried:

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

thank very much !!!