Adding splashscreen to u-boot.

Hello,
I am using Beaglebone black with ubuntu-12.04(3.8.13). I observed that penguin logo appears on the screen which is after starting kernel i.e. this is kernel splashscreen. I want to add splashscreen during the start of u-boot(U-Boot 2014.01). Is it possible?? Has anyone done it for Beaglebone Black board?? Where to start ??
Thanking you.

Regards,
kishor