TQ2440,linux-2.6.30.4启动出错请教

TQ2440，b-boot-1.1.6，linux内核2.6.30.4，根文件root-2.6.30.4，错误如下： VFS: Cannot open root device "mtdblock3" or unknown-block(0,0) Please append a correct "root=" boot option; here are the available partitions: 1f00             256 mtdblock0 (driver?) 1f01            2048 mtdblock1 (driver?) 1f02          257536 mtdblock2 (driver?) Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [<c0039ab4>] (unwind_backtrace+0x0/0xe8) from [<c026e384>] (panic+0x44/0x124) [<c026e384>] (panic+0x44/0x124) from [<c0008f38>] (mount_block_root+0x180/0x2c0) [<c0008f38>] (mount_block_root+0x180/0x2c0) from [<c00091dc>] (prepare_namespace+0x100/0x1bc) [<c00091dc>] (prepare_namespace+0x100/0x1bc) from [<c00085ac>] (kernel_init+0xc0/0xec) [<c00085ac>] (kernel_init+0xc0/0xec) from [<c0057088>] (do_exit+0x0/0x5fc) [<c0057088>] (do_exit+0x0/0x5fc) from [<00000000>] (0x0)