ToyRISC

This is a toy RISC-V simulator.

Notes

• Only way to change privilege mode is through ECALL and MRET/SRET.
• MRET/SRET will change the privilege mode to the one in MSTATUS.MPP
• Traps switch machine to M-mode unless mdeleg is set.
• "privilege mode stack"?
• https://cdn2.hubspot.net/hubfs/3020607/An%20Introduction%20to%20the%20RISC-V%20Architecture.pdf