The console output from U-Boot is not saved anywhere (by default).
Hence, there is no "log" is display.
You have to capture U-Boot's console messages as they are output (e.g. using a terminal emulation program's logging feature), or they are gone forever.
Also I am not sure what is CRTM in U-boot?
"CRTM" is not standard terminology for U-Boot AFAIK.
It probably refers to a secure bootstrap program that loads U-Boot.