linux启动不起来

VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "<NULL>" or unknown-block(2,0)
Please append a correct "root=" boot option; here are the available partitions:
1f00            1024 mtdblock0 (driver?)
1f01            3840 mtdblock1 (driver?)
1f02            3072 mtdblock2 (driver?)
1f03           61440 mtdblock3 (driver?)
1f04           61440 mtdblock4 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
DNW显示启动到这里就不动了，我用的是OK2440-IV的板，恳请高手指点啊！急……

在boot参数设置里面，将启动mtdblcok数修改为3，也可以将参数区擦掉后重启板子。