serial output

U-Boot SPL 2015.04-rc1-00204-gbd2a488 (Feb 15 2015 - 16:49:45)
DRAM: 1024 MiB
CPU: 960000000Hz, AXI/AHB/APB: 3/2/2


U-Boot 2015.04-rc1-00204-gbd2a488 (Feb 15 2015 - 16:49:45) Allwinner Technology

CPU:   Allwinner A20 (SUN7I)
I2C:   ready
DRAM:  1015 MiB
MMC:   SUNXI SD/MMC: 0
*** Warning - bad CRC, using default environment

Reserved 9216kB of RAM for Framebuffer.
HDMI connected: Setting up a 3840x2160 hdmi console
In:    serial
Out:   vga
Err:   vga
SCSI:  SUNXI SCSI INIT
SATA link 0 timeout.
AHCI 0001.0100 32 slots 1 ports 3 Gbps 0x1 impl SATA mode
flags: ncq stag pm led clo only pmp pio slum part ccc apst
Net:   dwmac.1c50000
starting USB...
USB0:   USB EHCI 1.00
scanning bus 0 for devices... 2 USB Device(s) found
USB1:   USB EHCI 1.00
scanning bus 1 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found
Hit any key to stop autoboot:  0
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
Found U-Boot script /boot.scr
reading /boot.scr
288 bytes read in 21 ms (12.7 KiB/s)
## Executing script at 43100000
reading uImage
2873288 bytes read in 158 ms (17.3 MiB/s)
reading pcduino3.dtb
23227 bytes read in 36 ms (629.9 KiB/s)
## Booting kernel from Legacy Image at 46000000 ...
   Image Name:   Linux-3.19.0-05375-gd347efe
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    2873224 Bytes = 2.7 MiB
   Load Address: 40008000
   Entry Point:  40008000
   Verifying Checksum ... OK
## Flattened Device Tree blob at 49000000
   Booting using the fdt blob at 0x49000000
   Loading Kernel Image ... OK
   Loading Device Tree to 4eff7000, end 4efffaba ... OK

Starting kernel ...