What's happen with my nano pi k2 just boot up and stop here.

 

GXL:BL1:9ac50e:a1974b;FEAT:ADFC318C;POC:3;RCY:0;EMMC:0;READ:0;CHK:AA;SD:0;READ:0;0.0;CHK:0;
no sdio debug board detected
TE: 194208 BL2 Built : 13:48:56, Sep 23 2016. gxl g7459bd4 - jianxin.pan@droid06 set vcck to 1120 mv set vddee to 1000 mv Board ID = 6 CPU clk: 1200MHz DQS-corr enabled DDR scramble enabled DDR3 chl: Rank0+1 @ 792MHz - PASS Rank0: 1024MB(auto)-2T-11 Rank1: 1024MB(auto)-2T-11 DataBus test pass! AddrBus test pass! Load fip header from SD, src: 0x0000c200, des: 0x01400000, size: 0x00004000 New fip structure! Load bl30 from SD, src: 0x00010200, des: 0x01100000, size: 0x0000d600 Load bl31 from SD, src: 0x00020200, des: 0x10100000, size: 0x00015400 Load bl33 from SD, src: 0x00038200, des: 0x01000000, size: 0x000a3400 NOTICE: BL3-1: v1.0(debug):2e39a99

 

Is the problem with boot loader or kernel or OS? 

What image is this?  You're not getting into Uboot with the info pasted.  A corrupted SD card is possible.

Thanks tony Mac32, I had try with another SD card and eMMC. The same problem, I try to custom my own boot loader it might something wrong.