Hi all,
I've read the riscduino code for 48 hours. We can see that Dinesh uses lots of designs from among the history of opencores, each submission of caravel, classical mcu, and other designs from the open-source world. In the software stack, riscduino is a combo of freedom platform and fpgaduino. It's a huge collection of hw and sw stack. 
Here is a group that we can read, and share the code. If you are interested, comment down below.
Best,
Yuda