From: Ron Dreslinski <rdreslin@umich.edu>
Date: Wed, 16 Aug 2006 19:56:22 +0000 (-0400)
Subject: Fixes for Kevins O3 model to work with the blocking caches.
X-Git-Tag: m5_2.0_beta1~20^2
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ec0a18ffb956bbcf54b8d4d94dac7255f8868a9e;p=gem5.git

Fixes for Kevins O3 model to work with the blocking caches.

src/cpu/o3/fetch_impl.hh:
    Fix ordering so dereference works
src/cpu/o3/lsq_impl.hh:
    Check to make sure we didn't squash already
src/cpu/o3/lsq_unit.hh:
    Fix for counting squashed retrys in the WB count
src/cpu/o3/lsq_unit_impl.hh:
    Make sure to set retryID for stores, and clear it appropriately

--HG--
extra : convert_revision : 689765a1baea7b36f13eb177d65e97b52b6da09f
---

diff --git a/src/cpu/o3/fetch_impl.hh b/src/cpu/o3/fetch_impl.hh
index 990db88ac..25be9d455 100644
--- a/src/cpu/o3/fetch_impl.hh
+++ b/src/cpu/o3/fetch_impl.hh
@@ -672,9 +672,9 @@ DefaultFetch<Impl>::doSquash(const Addr &new_PC, unsigned tid)
         assert(cacheBlocked);
         cacheBlocked = false;
         retryTid = -1;
-        retryPkt = NULL;
         delete retryPkt->req;
         delete retryPkt;
+        retryPkt = NULL;
     }
 
     fetchStatus[tid] = Squashing;
diff --git a/src/cpu/o3/lsq_impl.hh b/src/cpu/o3/lsq_impl.hh
index db2c253e1..2bbab71f0 100644
--- a/src/cpu/o3/lsq_impl.hh
+++ b/src/cpu/o3/lsq_impl.hh
@@ -71,6 +71,11 @@ template <class Impl>
 void
 LSQ<Impl>::DcachePort::recvRetry()
 {
+    if (lsq->retryTid == -1)
+    {
+        //Squashed, so drop it
+        return;
+    }
     lsq->thread[lsq->retryTid].recvRetry();
     // Speculatively clear the retry Tid.  This will get set again if
     // the LSQUnit was unable to complete its access.
diff --git a/src/cpu/o3/lsq_unit.hh b/src/cpu/o3/lsq_unit.hh
index 512b5a63c..1358a3699 100644
--- a/src/cpu/o3/lsq_unit.hh
+++ b/src/cpu/o3/lsq_unit.hh
@@ -646,6 +646,8 @@ LSQUnit<Impl>::read(Request *req, T &data, int load_idx)
     // handle it.
     if (lsq->cacheBlocked()) {
         ++lsqCacheBlocked;
+
+        iewStage->decrWb(load_inst->seqNum);
         // There's an older load that's already going to squash.
         if (isLoadBlocked && blockedLoadSeqNum < load_inst->seqNum)
             return NoFault;
diff --git a/src/cpu/o3/lsq_unit_impl.hh b/src/cpu/o3/lsq_unit_impl.hh
index 4f5dbbf1c..fa716c712 100644
--- a/src/cpu/o3/lsq_unit_impl.hh
+++ b/src/cpu/o3/lsq_unit_impl.hh
@@ -626,6 +626,7 @@ LSQUnit<Impl>::writebackStores()
             ++lsqCacheBlocked;
             assert(retryPkt == NULL);
             retryPkt = data_pkt;
+            lsq->setRetryTid(lsqID);
         } else {
             storePostSend(data_pkt);
         }
@@ -869,6 +870,7 @@ LSQUnit<Impl>::recvRetry()
             storePostSend(retryPkt);
             retryPkt = NULL;
             isStoreBlocked = false;
+            lsq->setRetryTid(-1);
         } else {
             // Still blocked!
             ++lsqCacheBlocked;