can not open ainitial console怎么回事啊

forgetful

IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 512 bind 512)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
VFS: Mounted root (romfs filesystem) readonly.
Warning: unable to open an initial console.
Kernel panic: Attempted to kill init!