Linux/DRA80XMEVM: TFTP boot issue

mallikarjun gattam

Intellectual 470 points

Part Number: DRA80XMEVM

Tool/software: Linux

Hi,

We are facing an issue while trying to boot the AM35X board from the TFTP server.

Following are the commands we used in the boot menu after pausing the autoboot

setenv autoload no

dhcp

set serverip 10.30.12.66

tftpboot ${loadaddr} Image

tftpboot ${fdtaddr} k3-am654-base-board.dtb

booti ${loadaddr} - ${fdtaddr}

The files imported from the TFTP server are "Image" and "k3-am654-base-board.dtb".

Where the "Image" file is nothing but "Image-am65xx-evm.bin" renamed. The TFTP server we

are using is 10.30.12.66.

While running the last command(booti ${loadaddr} - ${fdtaddr}) the kernal starts loading

and at a certain point is hangs printing out the below message

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

We also tried using the Image-k3-am654-base-board.dtb instead of k3-am654-base-board.dtb,

but the results are same .

The following commands were used to set up the TFTP server in the 10.30.12.66.

sudo apt-get install xinetd tftpd tftp

sudo mkdir /tftpboot
$ sudo chmod -R 777 /tftpboot
$ sudo chown -R nobody /tftpboot

We created the service in the file /etc/xinetd.d/tftp as follows

service tftp
{
    protocol        = udp
    port            = 69
    socket_type     = dgram
    wait            = yes
    user            = nobody
    server          = /usr/sbin/in.tftpd
    server_args     = /tftpboot
    disable         = no
}

sudo service xinetd restart

Please let us know if there any commands or steps that we are missing or using incorrectly.

Regards,

Mallikarjun

over 6 years ago

0 Biser Gatchev-XID over 6 years ago

TI__Guru**** 393215 points

Please clarify what board you are using, and which Linux version. In your post you refer to AM35x, DRA80x, and AM65x. Which is it?

0 mallikarjun gattam over 6 years ago in reply to Biser Gatchev-XID

Intellectual 470 points

Hi,

We are working on DRA80XMEVM soc is AM65X, we are using yocto build linux version, here i am attaching the yocto build environment image

0 mallikarjun gattam over 6 years ago in reply to Biser Gatchev-XID

Intellectual 470 points

Hi,

We are working on DRA80XMEVM soc is AM65X, we are using yocto build linux version, here i am attaching the yocto build environment image

0 mallikarjun gattam over 6 years ago in reply to Biser Gatchev-XID

Intellectual 470 points

Hi,

We are working on DRA80XMEVM soc is AM65X, we are using yocto build linux version, here i am attaching the yocto build environment image

0 RonB over 6 years ago in reply to mallikarjun gattam

TI__Mastermind 30746 points

Hello and thank you for your post. I think you are missing the commands to properly set your kernel command line.

Can you try to run add the below command to your sequence:

run args_mmc

before you execute the booti instruction?

The error means your kernel can't find a filesystem to start. This is passed on the kernel command line to Linux.

I hope this helps.

0 mallikarjun gattam over 6 years ago in reply to RonB

Intellectual 470 points

Yeah it worked, Now the kernal is booting fine

Thankyou

0 mallikarjun gattam over 6 years ago in reply to RonB

Intellectual 470 points

Thankyou for helping me out with the kernal boot issue,

I have a query i

How do I boot the entire rootfs with NFS.

setenv bootargs "console=ttyS2,115200n8 root=/dev/nfs nfsroot=172.24.147.117:/home/karthik/targetfs,nolock,proto=udp rw ip=dhcp"

Is the above command enough, or is there anything that I'm missing

0 RonB over 6 years ago in reply to mallikarjun gattam

TI__Mastermind 30746 points

Hello,

The only other thing I can think of is that you have to add that directory to your NFS exports on your host.

If you are having trouble, please attach a log to a new post.

Thanks.

Processors

Processors forum

Linux/DRA80XMEVM: TFTP boot issue

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