Fix several bugs pertaining to upgrades/mem leaks.

src/mem/cache/base_cache.cc:
    Fix a bug about not having a request to send
src/mem/cache/base_cache.hh:
    Fix a bug with the blocking code
src/mem/cache/cache.hh:
    AFix a bug with snoop hits in WB buffer
src/mem/cache/cache_impl.hh:
    Fix a bug with snoop hits in WB buffer
    Also, add better DPRINTF's
src/mem/cache/miss/miss_queue.cc:
    Fix a bug with upgrades (Need to clean it up later)
src/mem/cache/miss/mshr.cc:
    Fix a memory leak bug, still some outstanding with writebacks not being deleted
src/mem/cache/miss/mshr_queue.cc:
    Fix a bug about upgrades (need to clean up later)
src/mem/packet.hh:
    Fix for newly added cmd attribute for upgrades
tests/configs/memtest.py:
    More interesting testcase

--HG--
extra : convert_revision : fcb4f17dd58b537bb4f67a8c835f50e455e8c688

1 files changed, 7 insertions, 3 deletions

diff --git a/src/mem/cache/base_cache.hh b/src/mem/cache/base_cache.hh
index c45f3b71b..e0f12940f 100644
--- a/src/mem/cache/base_cache.hh
+++ b/src/mem/cache/base_cache.hh
@@ -392,11 +392,13 @@ class BaseCache : public MemObject
             blocked_causes[cause]++;
             blockedCycle = curTick;
         }
+        int old_state = blocked;
         if (!(blocked & flag)) {
             //Wasn't already blocked for this cause
             blocked |= flag;
             DPRINTF(Cache,"Blocking for cause %s\n", cause);
-            cpuSidePort->setBlocked();
+            if (!old_state)
+                cpuSidePort->setBlocked();
         }
     }
 
@@ -408,10 +410,12 @@ class BaseCache : public MemObject
     void setBlockedForSnoop(BlockedCause cause)
     {
         uint8_t flag = 1 << cause;
-        if (!(blocked & flag)) {
+        uint8_t old_state = blockedSnoop;
+        if (!(blockedSnoop & flag)) {
             //Wasn't already blocked for this cause
             blockedSnoop |= flag;
-            memSidePort->setBlocked();
+            if (!old_state)
+                memSidePort->setBlocked();
         }
     }