I couldn't quite use the implementation from Flute as the register was
too wide for verilator.
This one uses wide memories instead, which is way complicated, but I
think it works. The width of the memory can be traded off for reset
speed. The width at the moment is 8192 bits, which seems to be fast
enough.
Now able to run multiple ISA tests in a single simulation run
connected to remote debugger DSharp, using either hart_reset or
ndm_reset between tests to bring the system back into reset state.
All Debug Module commands working:
- dm_reset, hart_reset, ndm_reset
- break (set breakpoint)
- step
- continue (until breakpoint of 'halt' command)
- halt
- read/write GPR, FPR, CSR, memory
- elf_load
