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View Full Version : mounting kernel through NFS for s3c2410

ashwin_karanth
July 21st, 2010, 14:34
hi..
I want load kernel image through nfs for s3c2410,i am using the following procedure, and i am using minicom as a serial interface.and uboot loader is already in the board.

I am following this link to configure NFS
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-nfs.html


setting arguments
s3c32410# set gatewayip 172.16.5.1
s3c32410# set ipaddr 172.16.5.150
s3c32410# set serverip 172.16.5.63

To load the kernel into addresss refers to DRAM
nfs 31000000 172.16.5.63:/tftpboot/kernel.boot

The error is
Filetransfer via NFS from server 172.16.5.63; our IP address is 172.16.5.150
Filename /tftpboot/kernel.boot
Load address :0x31000000
Loading: *** ERROR:cannot mount
***ERROR:cannot umount


can any one help me out to solve this problem.
wblock@
July 21st, 2010, 15:40
What do you have in /etc/exports?
ashwin_karanth
July 21st, 2010, 15:49
/tftpboot/kernel.boot -rw -network 172.16.5.63 -mask 255.255.255.0
wblock@
July 21st, 2010, 16:11
/tftpboot/kernel.boot -rw -network 172.16.5.63 -mask 255.255.255.0

It should export the directory, not the file itself. Also might be user concerns. Check that kernel.boot is readable by the user logging in, or if you don't know what user the target board uses, do a mapall like below. Exported dirs probably should be -ro unless you're going to write back from the target system.

/tftpboot -ro -mapall=nobody:nobody -network 172.16.5.63 mask 255.255.255.0
ashwin_karanth
July 22nd, 2010, 04:05
hi wblock thanks for your suggestion..
is there need to set any kernel arguments while building a kernel..i am setting only in the board specific file LN2410SBC.

option BOOTP
option BOOTP_NFSROOT
option NFSCLIENT
option NFS_ROOT
sasha
July 29th, 2010, 20:28
Can you tell me, which command you are using to create file 'kernel.boot'? Or it is same as 'kernel'?
I know that the image for u-boot can be generated by mkimage, but I don't know exact parameters for FreeBSD kernel.
Thanks!
ashwin_karanth
July 30th, 2010, 17:39
I am taking kernel file to linux machine and i am using mkimage command to create kernel.boot file
rodrigc@
October 1st, 2011, 21:32
Please look at this document which was recently added to the FreeBSD handbook:

"PXE Booting with a NFS Root File System"
http://www.freebsd.org/doc/handbook/network-pxe-nfs.html

That might help you get a working NFS + PXE boot setup.