Some work on CSR

emulator/main.c

@@ -24,8 +24,7 @@ int main(int argc, char* argv[])
     }
 
     struct Hart hart = {0};
-    hart.mem = mem;
-    hart.mem_size = mem_size;
+    hart_init(&hart, 0, mem, mem_size);
 
     execute_from(&hart, start_address);