到了kernel，就停止了，但是系统起来了，能运行
#Boot ver: 2015-07-20#2.19
empty serial no.
checkKey
vbus = 1
board_fbt_key_pressed: ir_keycode = 0x0, frt = 0
no fuel gauge found
no fuel gauge found
read logo_on switch from dts [0]
no fuel gauge found
checkKey
vbus = 1
board_fbt_key_pressed: ir_keycode = 0x0, frt = 0
Hit any key to stop autoboot: 0
load fdt from resouce.
ERROR: [get_entry_ram]: Cannot find logo_kernel.bmp!
Secure Boot state: 0
kernel @ 0x02000000 (0x00693d98)
ramdisk @ 0x05bf0000 (0x00138fb4)
bootrk: do_bootm_linux…
Loading Device Tree to 05600000, end 0561b5ad … OK
Add bank:0000000000000000, 0000000080000000
Starting kernel …