An old problem ...about linux mount rootfs with nfs

[Wolfgang Denk]

In message <1124852294.11078.8.camel at banana> you wrote:
> 
>     I used u-boot-1.1.3 and 2.4.25 linux on my custom MPC852T board, I
> can't mount /opt/eldk/ppc_8xx as rootfs.

You pass incomplete config options to the kernel.

> Hit any key to stop autoboot:  0
> => setenv hostname banana
> => setenv bootargs root=/dev/nfs rw nfsroot=$(serverip):$(rootpath) ip=
> $(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname)::off
> => printenv
> bootcmd=bootm 40040000 40100000
> bootdelay=3
> baudrate=115200
> loads_echo=1
> ethprime=SCC ETHERNET
> ipaddr=10.0.14.110
> serverip=10.0.14.26
> netmask=255.255.0.0
> preboot=echo;
> netdev=eth0
^^^^^^^^^^^^^
> nfsargs=setenv bootargs root=/dev/nfs rw nfsroot=$(serverip):$(rootpath)
> ramargs=setenv bootargs root=/dev/ram rw
> addip=setenv bootargs $(bootargs) ip=$(ipaddr):$(serverip):$(gatewayip):
> $(netmask):$(hostname):$(netdev):off panic=1
                         ^^^^^^^^^

Here you have all the necessary prparations.

> bootargs=root=/dev/nfs rw nfsroot=10.0.14.26:/opt/eldk/ppc_8xx
> ip=10.0.14.110:10.0.14.26::255.255.0.0:banana::off
                                               ^^

But here you are missing to pass the information which ethernet interface to use.

> Kernel command line: root=/dev/nfs rw
> nfsroot=10.0.14.26:/opt/eldk/ppc_8xx
> ip=10.0.14.110:10.0.14.26::255.255.0.0:banana::off
-----------------------------------------------^^^

No interface selected.

> eth0: CPM ENET Version 0.2 on SCC4, 00:01:02:b4:36:56
> eth1: FEC ENET Version 0.3, FEC irq 9, MII irq 12, addr
> 00:01:02:b4:36:57

But there are two intefaces. Which one should the kernel use?

Just fix your bootargs.

Best regards,

Wolfgang Denk

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Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
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