Uboot starting

U-Boot 2014.04-10733-gea1ac32 (Jul 07 2015 - 14:40:33) Allwinner Technology

CPU:   Allwinner A20 (SUN7I)
Board: Merrii_Hummingbird_A20
I2C:   ready
DRAM:  1 GiB
MMC:   SUNXI SD/MMC: 0
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   No ethernet found.
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
241 bytes read in 16 ms (14.6 KiB/s)
Jumping to boot.scr
## Executing script at 44000000
reading script.bin
48524 bytes read in 32 ms (1.4 MiB/s)
reading uImage
4543272 bytes read in 508 ms (8.5 MiB/s)
## Booting kernel from Legacy Image at 48000000 ...
   Image Name:   Linux-3.4.103-g9a1cd03
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    4543208 Bytes = 4.3 MiB
   Load Address: 40008000
   Entry Point:  40008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK

Starting kernel ...