Bootloader not boot after DRAM?

Available Cores: MP1 MP2
DRAM interleave size: 0x0
platform reference clock 
I2C: ready
DRAM_BANKS[0]: 0x00000000, 0x7ff00000
DRAM: 2 Gib

I am using the Q seven Board and running Boot loader on this Board but it
is not start after DRAM: 2 GB ,How i will solve this issue?