invalidate I$ prefetcher when invalidating I$

rocket/src/main/scala/icache_prefetch.scala

@@ -19,6 +19,7 @@ class ioIPrefetcherMem(view: List[String] = null) extends Bundle (view)
 class ioIPrefetcher extends Bundle() {
   val icache = new ioICache();
   val mem = new ioIPrefetcherMem();
+  val invalidate = Bool(INPUT)
 }
 
 class rocketIPrefetcher extends Component() {
@@ -84,6 +85,10 @@ class rocketIPrefetcher extends Component() {
       when (fill_done.toBool & ip_mem_resp_val.toBool) { state := s_req_wait; }
     }
   }
+
+  when (io.invalidate) {
+    state := s_invalid
+  }
 }
 
 }

rocket/src/main/scala/top.scala

@@ -30,6 +30,7 @@ class Top() extends Component {
   cpu.io.debug      <> io.debug;
   cpu.io.console    <> io.console;
 
+  icache_pf.io.invalidate := cpu.io.imem.invalidate
   icache.io.mem     <> icache_pf.io.icache;
   cpu.io.imem       <> icache.io.cpu;
   cpu.io.vimem      <> vicache.io.cpu;