fix l2 cache issues

driver/rtlsim/Makefile

@@ -18,7 +18,7 @@ DBG_PRINT_FLAGS = -DDBG_PRINT_CORE_ICACHE \
 #MULTICORE += -DNUM_CLUSTERS=1 -DNUM_CORES=4
 MULTICORE += -DNUM_CLUSTERS=1 -DNUM_CORES=2
 
-#DEBUG = 1
+#DEBUG=1
 #AFU=1
 
 CFLAGS += -fPIC

driver/rtlsim/vortex.cpp

@@ -138,8 +138,11 @@ public:
     int flush_caches(size_t dev_maddr, size_t size) {
         if (future_.valid()) {
             future_.wait(); // ensure prior run completed
-        }
-        simulator_.flush_caches(dev_maddr, size);
+        }        
+        simulator_.flush_caches(dev_maddr, size);        
+        while (simulator_.is_busy()) {
+            simulator_.step();
+        };
         return 0;
     }