210,212c210,211
< max_size = long(mem_range[1])
< assert max_size >= long(Addr(mem_size))
< self.mem_ranges = [ AddrRange(start=mem_range[0], size=mem_size) ]
---
> assert long(mem_range.size()) >= long(Addr(mem_size))
> self.mem_ranges = [ AddrRange(start=mem_range.start, size=mem_size) ]