移植zImage出现的问题

以下是我编译好的zImage，移植到开发板上的问题，编译成功却不能正常启动开发板：
请高手帮帮忙，看看是什么问题
Advanced Linux Sound Architecture Driver Version 1.0.20.
ALSA device list:
  No soundcards found.
TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
Root-NFS: No NFS server available, giving up.
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "mtdblock2" or unknown-block(2,0)
Please append a correct "root=" boot option; here are the available partitions:
1f00          262144 mtdblock0 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[<c0029ab4>] (unwind_backtrace+0x0/0xe8) from [<c02c26b4>] (panic+0x44/0x124)
[<c02c26b4>] (panic+0x44/0x124) from [<c0008fe0>] (mount_block_root+0x16c/0x224)

[<c0008fe0>] (mount_block_root+0x16c/0x224) from [<c0009284>] (prepare_namespace
+0x100/0x1bc)
[<c0009284>] (prepare_namespace+0x100/0x1bc) from [<c00085ac>] (kernel_init+0xc0
/0xec)
[<c00085ac>] (kernel_init+0xc0/0xec) from [<c0047ccc>] (do_exit+0x0/0x5fc)
[<c0047ccc>] (do_exit+0x0/0x5fc) from [<00000000>] (0x0)

请高手们尽早帮忙解决以上问题啊

你移植到哪一步了呢？添加了yaffs的支持吗？根据你的提示信息还没有移植yaffs哦。

你移植到哪一步了呢？添加了yaffs的支持吗？根据你的提示信息还没有移植yaffs哦。

我移植了YAFFS2文件系统它还是那样。。我就不明白了，，，后来我想，，是不是TQ2440不支持256MB的NANDFLASH呢？？于是我就改了成了128MB了！！！接着就成功了，，可是有个问题，过了10秒钟之后就自动重启了！！！真不明白！！！为什么呢？？？？

可能是看门狗在作怪

具体应该怎么做呢？？？？

在Linux移植手册里面有看门狗的章节。