I'm now porting coreboot to CubieTruck, a development board with an
Allwinner A20 SoC. I use Mr.Nuke's code and Allwinner's user manual for
reference.However, when I modified the code and tested with the board, the
console gave only two lines of message and it get stuck. So I thought DRAM
init failed. I put some printks at bootblock_media.c, and found the bug
occurs at line 118, which showed the access of a certain memory space
caused the error. So I need to know how to check if the DRAM init works.