util: make a generic checkpoint aggregator that can aggregate different cpts into one multi-programmed cpt. Make minor changes to serialization/unserialization to get it to work properly. Note that checkpoints were made with a comment at the beginning with // - this must be changed to ## to work properly with the python config parser in the aggregator.

src/mem/page_table.cc

@@ -222,6 +222,16 @@ PageTable::unserialize(Checkpoint *cp, const std::string &section)
         entry->unserialize(cp, csprintf("%s.Entry%d", process->name(), i));
         pTable[vaddr] = *entry;
         ++i;
-   }
+    }
+
+    process->M5_pid = pTable[vaddr].asn;
+
+#if THE_ISA == ALPHA_ISA
+    // The IPR_DTB_ASN misc reg must be set in Alpha for the tlb to work 
+    // correctly
+    int id = process->contextIds[0];
+    ThreadContext *tc = process->system->getThreadContext(id);
+    tc->setMiscRegNoEffect(IPR_DTB_ASN, process->M5_pid << 57);
+#endif
 }