NFS挂载，系统启动后显示如下错误。请问高手怎么解决？
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
IP-Config: Device `eth0' not found.
Looking up port of RPC 100003/2 on 192.168.1.1
rpcbind: server 192.168.1.1 not responding, timed out
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on 192.168.1.1
rpcbind: server 192.168.1.1 not responding, timed out
Root-NFS: Unable to get mountd port number from server, using default
Root-NFS: Server returned error -5 while mounting /home/rootfs
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs/" or unknown-block(2,0)
Please append a correct "root=" boot option; here are the available partitions:
1f00 256 mtdblock0 (driver?)
1f01 128 mtdblock1 (driver?)
1f02 5120 mtdblock2 (driver?)
1f03 125568 mtdblock3 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
