tf卡定制linux系统报错

bestone

U-Boot SPL 2013.10-rc2-08400-g8a4621c-dirty (Nov 19 2013 - 11:53:24)
Board: Cubieboard2
DRAM: 1024 MiB
CPU: 960000000Hz, AXI/AHB/APB: 3/2/2
spl: not an uImage at 1600


U-Boot 2013.10-rc2-08400-g8a4621c-dirty (Nov 19 2013 - 11:53:24) Allwinner Technology

CPU:   Allwinner A20 (SUN7I)
Board: Cubieboard2
I2C:   ready
DRAM:  1 GiB
MMC:   SUNXI SD/MMC: 0
In:    serial
Out:   serial
Err:   serial
Net:   emac
Hit any key to stop autoboot:  0
reading uEnv.txt
** Unable to read file uEnv.txt **
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
reading boot.scr
283 bytes read in 3 ms (91.8 KiB/s)
Jumping to boot.scr
## Executing script at 44000000
reading boot/script.bin
45384 bytes read in 7 ms (6.2 MiB/s)
reading boot/uImage
4454424 bytes read in 198 ms (21.5 MiB/s)
## Booting kernel from Legacy Image at 48000000 ...
   Image Name:   Linux-3.4.43+
   Created:      2013-11-19   6:34:11 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    4454360 Bytes = 4.2 MiB
   Load Address: 40008000
   Entry Point:  40008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK

Starting kernel ...

resetting ...


求助!!!!!!急急急急，不知道什么原因。