From 78e2be6a864a42e33189109be5eff465bb3fbd8d Mon Sep 17 00:00:00 2001
From: William Wang <zeweiwang@outlook.com>
Date: Thu, 2 Feb 2023 14:32:31 +0800
Subject: [PATCH] chore: add l1 pf fuzzer

---
 src/main/scala/xiangshan/backend/MemBlock.scala | 17 +++++++++++++++++
 .../scala/xiangshan/mem/lsqueue/LoadQueue.scala |  3 ++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/main/scala/xiangshan/backend/MemBlock.scala b/src/main/scala/xiangshan/backend/MemBlock.scala
index 991e27a04..8b1b9406c 100644
--- a/src/main/scala/xiangshan/backend/MemBlock.scala
+++ b/src/main/scala/xiangshan/backend/MemBlock.scala
@@ -204,6 +204,23 @@ class MemBlockImp(outer: MemBlock) extends LazyModuleImp(outer)
   l1_pf_req.ready := (l1_pf_req.bits.confidence > 0.U) ||
     loadUnits.map(!_.io.ldin.valid).reduce(_ || _)
 
+  // l1 pf fuzzer interface
+  val DebugEnableL1PFFuzzer = false
+  if (DebugEnableL1PFFuzzer) {
+    // l1 pf req fuzzer
+    val fuzzer = Module(new L1PrefetchFuzzer())
+    fuzzer.io.vaddr := DontCare
+    fuzzer.io.paddr := DontCare
+
+    // override load_unit prefetch_req
+    loadUnits.foreach(load_unit => {
+      load_unit.io.prefetch_req.valid <> fuzzer.io.req.valid
+      load_unit.io.prefetch_req.bits <> fuzzer.io.req.bits
+    })
+
+    fuzzer.io.req.ready := l1_pf_req.ready
+  }
+
   // TODO: fast load wakeup
   val lsq     = Module(new LsqWrappper)
   val vlsq    = Module(new DummyVectorLsq)
diff --git a/src/main/scala/xiangshan/mem/lsqueue/LoadQueue.scala b/src/main/scala/xiangshan/mem/lsqueue/LoadQueue.scala
index 247d24e53..75ebf7abf 100644
--- a/src/main/scala/xiangshan/mem/lsqueue/LoadQueue.scala
+++ b/src/main/scala/xiangshan/mem/lsqueue/LoadQueue.scala
@@ -347,7 +347,8 @@ class LoadQueue(implicit p: Parameters) extends XSModule
   })
 
   (0 until LoadPipelineWidth).map(i => {
-    vaddrModule.io.raddr(LoadPipelineWidth + i) := loadReplaySelGen(i)
+    // vaddrModule rport 0 and 1 is used by exception and mmio 
+    vaddrModule.io.raddr(2 + i) := loadReplaySelGen(i)
   })
 
   (0 until LoadPipelineWidth).map(i => {
-- 
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