专家，您好！
我的DM365在启动的时候，串口一直循环输出下面信息：
DM36x initialization passed!
TI UBL Version: 1.50
Booting Catalog Boot Loader
BootMode = NAND
Starting NAND Copy...
Valid magicnum, 0xA1ACED66, found in block 0x00000019.
DONE
Jumping to entry point at 0x81080000.
请问为何进不了u-boot？
