cannot open root device

No, you should use initramfs and don't specify kernel command string.

The problem maybe you miss the rootfs.

did you follow the uclinux-dist wiki page?

http://nioswiki.jot.com/wikihome/operating...nux/uclinuxdist (http://nioswiki.jot.com/wikihome/operatingsystems/%c2%b5clinux/uclinuxdist)

Check if files exist in uClinux-dist/romfs.

And run "make" and "make linux image" again.

--- Quote Start ---

originally posted by hippo@Nov 18 2006, 02:50 AM

no, you should use initramfs and don't specify kernel command string.

the problem maybe you miss the rootfs.

did you follow the uclinux-dist wiki page?

http://nioswiki.jot.com/wikihome/operating...nux/uclinuxdist (http://nioswiki.jot.com/wikihome/operatingsystems/%c2%b5clinux/uclinuxdist)

check if files exist in uclinux-dist/romfs.

and run "make" and "make linux image" again.

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=19505)

--- quote end ---

--- Quote End ---

Hi Hippo

thanks for reply ! Yes I did step by step uclinux-dist wiki page and I have uClinux-dist/romfs . i using uClinux-dist-20060803.tar.bz2 . I built for board 1c12 and 2s60es but I got the same error :

" .......

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

VFS: Cannot open root device "NULL" or unknown-block(0,0)

Please append a correct "root=" boot option

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

Can you help me ? Why ????

thanks

--- Quote Start ---

originally posted by dai_minh+nov 19 2006, 10:27 am--><div class='quotetop'>quote (dai_minh @ nov 19 2006, 10:27 am)</div>

--- quote start ---

<!--quotebegin-hippo@Nov 18 2006, 02:50 AM

no, you should use initramfs and don&#39;t specify kernel command string.

the problem maybe you miss the rootfs.

did you follow the uclinux-dist wiki page?

http://nioswiki.jot.com/wikihome/operating...nux/uclinuxdist (http://nioswiki.jot.com/wikihome/operatingsystems/%c2%b5clinux/uclinuxdist)

check if files exist in uclinux-dist/romfs.

and run "make" and "make linux image" again.

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=19505)

--- quote end ---

--- Quote End ---

Hi Hippo

thanks for reply ! Yes I did step by step uclinux-dist wiki page and I have uClinux-dist/romfs . i using uClinux-dist-20060803.tar.bz2 . I built for board 1c12 and 2s60es but I got the same error :

" .......

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

VFS: Cannot open root device "NULL" or unknown-block(0,0)

Please append a correct "root=" boot option

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

Can you help me ? Why ????

thanks

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=19513)</div>

[/b]

--- Quote End ---

Check if files exist in uClinux-dist/romfs.

And run "make" and "make linux image" again.

Hi Hippo !

I did but I got the same message error .

".....

TCP: Hash tables configured (established 1024 bind 1024)TCP reno registeredio scheduler noop registeredio scheduler deadline registered (default)Serial: JTAG UART driver $Revision: 1.1 $ttyJ0 at MMIO 0x80801080 (irq = 2) is a jtag_uartTCP bic registeredNET: Registered protocol family 1NET: Registered protocol family 17VFS:

cannot open root device "<null>" or unknown-block(0,0)

please append a correct "root=" boot optionkernel panic - not syncing: vfs:

unable to mount root fs on unknown-block(0,0)

"

I have uClinux-dist/romfs dir but romfs/bin and romfs/dev ,./lib ,../ mnt ,../proc ,../sys ,../tmp ,../usr , ../var

dir is empty --> what wrong ????

thanks .

--- Quote Start ---

originally posted by vietluong@Nov 19 2006, 12:09 PM

hi hippo !

i did but i got the same message error .

".....

tcp: hash tables configured (established 1024 bind 1024)tcp reno registeredio scheduler noop registeredio scheduler deadline registered (default)serial: jtag uart driver $revision: 1.1 $ttyj0 at mmio 0x80801080 (irq = 2) is a jtag_uarttcp bic registerednet: registered protocol family 1net: registered protocol family 17vfs:

Cannot open root device "<NULL>" or unknown-block(0,0)

Please append a correct "root=" boot optionKernel panic - not syncing: VFS:

Unable to mount root fs on unknown-block(0,0)[/b]

"

I have uClinux-dist/romfs dir but romfs/bin and romfs/dev ,./lib ,../ mnt ,../proc ,../sys ,../tmp ,../usr , ../var

dir is empty --> what wrong ????

thanks .

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=19515)

--- Quote End ---

[/b]

--- Quote End ---

Please restore to default setting, and try again,

make clean

make menuconfig

Kernel/Library/Defaults Selection --->

(linux-2.6.x) Kernel Version

(None) Libc Version

[*] Default all settings (lose changes)

[ ] Customize Kernel Settings

[ ] Customize Vendor/User Settings

[ ] Update Default Vendor Settings

Then <exit> <exit> <yes>

do not change any other setting until first boot successfully.

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 !!!

It looks like the initramfs was empty,

please check if you have files in romfs/bin ?

Please check initramfs content as in the wiki page,

http://nioswiki.jot.com/wikihome/operating...initramfsupdate (http://nioswiki.jot.com/wikihome/operatingsystems/%c2%b5clinux/initramfsupdate)

Which Linux distro do you use?

--- Quote Start ---

originally posted by hippo@Nov 19 2006, 10:36 PM

it looks like the initramfs was empty,

please check if you have files in romfs/bin ?

please check initramfs content as in the wiki page,

http://nioswiki.jot.com/wikihome/operating...initramfsupdate (http://nioswiki.jot.com/wikihome/operatingsystems/%c2%b5clinux/initramfsupdate)

which linux distro do you use?

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=19527)

--- quote end ---

--- Quote End ---

Hi hippo !

yes . I don&#39;t have any file in romfs/bin .

I build kernel on Linux platform . I have 3 file : nios2gcc.tar.bz2 + uClinux-dist-20060803.tar.bz2 + uClinux-dist-200608003-nios2-02.diff.gz and i did step by step in uclinux-dist wiki page .

I think some file is wrong ? is it correct !!!

thanks !

--- Quote Start ---

originally posted by vietluong+nov 20 2006, 12:20 pm--><div class='quotetop'>quote (vietluong @ nov 20 2006, 12:20 pm)</div>

--- quote start ---

<!--quotebegin-hippo@Nov 19 2006, 10:36 PM

it looks like the initramfs was empty,

please check if you have files in romfs/bin ?

please check initramfs content as in the wiki page,

http://nioswiki.jot.com/wikihome/operating...initramfsupdate (http://nioswiki.jot.com/wikihome/operatingsystems/%c2%b5clinux/initramfsupdate)

which linux distro do you use?

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=19527)

--- quote end ---

--- Quote End ---

Hi hippo !

yes . I don&#39;t have any file in romfs/bin .

I build kernel on Linux platform . I have 3 file : nios2gcc.tar.bz2 + uClinux-dist-20060803.tar.bz2 + uClinux-dist-200608003-nios2-02.diff.gz and i did step by step in uclinux-dist wiki page .

I think some file is wrong ? is it correct !!!

thanks !

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=19528)</div>

[/b]

--- Quote End ---

What Linux platform do you use?

It maybe romfs install problem.

Check if busybox built,

ls -l user/busybox/busybox

Hi Hippo !

yes I think it have problem when install romfs . but how is it resolve ?

I use Fedora core 5 .

thank very much for help !!!