ruby: interface with classic memory controller

This patch is the final in the series.  The whole series and this patch in
particular were written with the aim of interfacing ruby's directory controller
with the memory controller in the classic memory system.  This is being done
since ruby's memory controller has not being kept up to date with the changes
going on in DRAMs.  Classic's memory controller is more up to date and
supports multiple different types of DRAM.  This also brings classic and
ruby ever more close.  The patch also changes ruby's memory controller to
expose the same interface.

29 files changed, 521 insertions, 981 deletions

diff --git a/src/mem/protocol/MESI_Two_Level-dir.sm b/src/mem/protocol/MESI_Two_Level-dir.sm
index 939ae2a36..fa9d1f3d3 100644
--- a/src/mem/protocol/MESI_Two_Level-dir.sm
+++ b/src/mem/protocol/MESI_Two_Level-dir.sm
@@ -28,7 +28,6 @@
 
 machine(Directory, "MESI Two Level directory protocol")
  : DirectoryMemory * directory;
-   MemoryControl * memBuffer;
    Cycles to_mem_ctrl_latency := 1;
    Cycles directory_latency := 6;
 
@@ -154,17 +153,21 @@ machine(Directory, "MESI Two Level directory protocol")
     if(is_valid(tbe)) {
       testAndRead(addr, tbe.DataBlk, pkt);
     } else {
-      memBuffer.functionalRead(pkt);
+      functionalMemoryRead(pkt);
     }
   }
 
   int functionalWrite(Address addr, Packet *pkt) {
+    int num_functional_writes := 0;
+
     TBE tbe := TBEs[addr];
     if(is_valid(tbe)) {
-      testAndWrite(addr, tbe.DataBlk, pkt);
+      num_functional_writes := num_functional_writes +
+        testAndWrite(addr, tbe.DataBlk, pkt);
     }
 
-    return memBuffer.functionalWrite(pkt);
+    num_functional_writes := num_functional_writes + functionalMemoryWrite(pkt);
+    return num_functional_writes;
   }
 
   void setAccessPermission(Address addr, State state) {
@@ -182,7 +185,6 @@ machine(Directory, "MESI Two Level directory protocol")
 
   // ** OUT_PORTS **
   out_port(responseNetwork_out, ResponseMsg, responseFromDir);
-  out_port(memQueue_out, MemoryMsg, memBuffer);
 
   // ** IN_PORTS **
 
@@ -223,7 +225,7 @@ machine(Directory, "MESI Two Level directory protocol")
   }
 
   // off-chip memory request/response is done
-  in_port(memQueue_in, MemoryMsg, memBuffer, rank = 2) {
+  in_port(memQueue_in, MemoryMsg, responseFromMemory, rank = 2) {
     if (memQueue_in.isReady()) {
       peek(memQueue_in, MemoryMsg) {
         if (in_msg.Type == MemoryRequestType:MEMORY_READ) {
@@ -300,46 +302,21 @@ machine(Directory, "MESI Two Level directory protocol")
 
   action(qf_queueMemoryFetchRequest, "qf", desc="Queue off-chip fetch request") {
     peek(requestNetwork_in, RequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, to_mem_ctrl_latency) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_READ;
-        out_msg.Sender := machineID;
-        out_msg.OriginalRequestorMachId := in_msg.Requestor;
-        out_msg.MessageSize := in_msg.MessageSize;
-        out_msg.Prefetch := in_msg.Prefetch;
-
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryRead(in_msg.Requestor, address, to_mem_ctrl_latency);
     }
   }
 
   action(qw_queueMemoryWBRequest, "qw", desc="Queue off-chip writeback request") {
     peek(responseNetwork_in, ResponseMsg) {
-      enqueue(memQueue_out, MemoryMsg, to_mem_ctrl_latency) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_WB;
-        out_msg.Sender := machineID;
-        out_msg.OriginalRequestorMachId := in_msg.Sender;
-        out_msg.DataBlk := in_msg.DataBlk;
-        out_msg.MessageSize := in_msg.MessageSize;
-        //out_msg.Prefetch := in_msg.Prefetch;
-
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryWrite(in_msg.Sender, address, to_mem_ctrl_latency,
+                       in_msg.DataBlk);
     }
   }
 
 //added by SS for dma
   action(qf_queueMemoryFetchRequestDMA, "qfd", desc="Queue off-chip fetch request") {
     peek(requestNetwork_in, RequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, to_mem_ctrl_latency) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_READ;
-        out_msg.Sender := machineID;
-        out_msg.OriginalRequestorMachId := machineID;
-        out_msg.MessageSize := in_msg.MessageSize;
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryRead(in_msg.Requestor, address, to_mem_ctrl_latency);
     }
   }
 
@@ -359,16 +336,11 @@ machine(Directory, "MESI Two Level directory protocol")
     }
   }
 
-  action(qw_queueMemoryWBRequest_partial, "qwp", desc="Queue off-chip writeback request") {
-     peek(requestNetwork_in, RequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, to_mem_ctrl_latency) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_WB;
-        out_msg.OriginalRequestorMachId := machineID;
-        out_msg.DataBlk.copyPartial(in_msg.DataBlk, addressOffset(address), in_msg.Len);
-        out_msg.MessageSize := in_msg.MessageSize;
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+  action(qw_queueMemoryWBRequest_partial, "qwp",
+         desc="Queue off-chip writeback request") {
+    peek(requestNetwork_in, RequestMsg) {
+      queueMemoryWritePartial(machineID, address, to_mem_ctrl_latency,
+                              in_msg.DataBlk, in_msg.Len);
     }
   }
 
@@ -424,22 +396,11 @@ machine(Directory, "MESI Two Level directory protocol")
     }
   }
 
-  action(qw_queueMemoryWBRequest_partialTBE, "qwt", desc="Queue off-chip writeback request") {
+  action(qw_queueMemoryWBRequest_partialTBE, "qwt",
+         desc="Queue off-chip writeback request") {
     peek(responseNetwork_in, ResponseMsg) {
-      enqueue(memQueue_out, MemoryMsg, to_mem_ctrl_latency) {
-        assert(is_valid(tbe));
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_WB;
-        out_msg.OriginalRequestorMachId := in_msg.Sender;
-        //out_msg.DataBlk := in_msg.DataBlk;
-        //out_msg.DataBlk.copyPartial(tbe.DataBlk, tbe.Offset, tbe.Len);
-        out_msg.DataBlk.copyPartial(tbe.DataBlk, addressOffset(tbe.PhysicalAddress), tbe.Len);
-
-        out_msg.MessageSize := in_msg.MessageSize;
-        //out_msg.Prefetch := in_msg.Prefetch;
-
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryWritePartial(in_msg.Sender, tbe.PhysicalAddress,
+                              to_mem_ctrl_latency, tbe.DataBlk, tbe.Len);
     }
   }
 
diff --git a/src/mem/protocol/MI_example-dir.sm b/src/mem/protocol/MI_example-dir.sm
index 60662080a..def7053ea 100644
--- a/src/mem/protocol/MI_example-dir.sm
+++ b/src/mem/protocol/MI_example-dir.sm
@@ -29,8 +29,8 @@
 
 machine(Directory, "Directory protocol") 
     : DirectoryMemory * directory;
-      MemoryControl * memBuffer;
       Cycles directory_latency := 12;
+      Cycles to_memory_controller_latency := 1;
 
       MessageBuffer * forwardFromDir, network="To", virtual_network="3",
             ordered="false", vnet_type="forward";
@@ -178,17 +178,21 @@ machine(Directory, "Directory protocol")
     if(is_valid(tbe)) {
       testAndRead(addr, tbe.DataBlk, pkt);
     } else {
-      memBuffer.functionalRead(pkt);
+      functionalMemoryRead(pkt);
     }
   }
 
   int functionalWrite(Address addr, Packet *pkt) {
+    int num_functional_writes := 0;
+
     TBE tbe := TBEs[addr];
     if(is_valid(tbe)) {
-      testAndWrite(addr, tbe.DataBlk, pkt);
+      num_functional_writes := num_functional_writes +
+            testAndWrite(addr, tbe.DataBlk, pkt);
     }
 
-    return memBuffer.functionalWrite(pkt);
+    num_functional_writes := num_functional_writes + functionalMemoryWrite(pkt);
+    return num_functional_writes;
   }
 
   // ** OUT_PORTS **
@@ -197,10 +201,7 @@ machine(Directory, "Directory protocol")
   out_port(requestQueue_out, ResponseMsg, requestToDir); // For recycling requests
   out_port(dmaResponseNetwork_out, DMAResponseMsg, dmaResponseFromDir);
 
-//added by SS
-  out_port(memQueue_out, MemoryMsg, memBuffer);
   // ** IN_PORTS **
-
   in_port(dmaRequestQueue_in, DMARequestMsg, dmaRequestToDir) {
     if (dmaRequestQueue_in.isReady()) {
       peek(dmaRequestQueue_in, DMARequestMsg) {
@@ -239,7 +240,7 @@ machine(Directory, "Directory protocol")
 
 //added by SS
   // off-chip memory request/response is done
-  in_port(memQueue_in, MemoryMsg, memBuffer) {
+  in_port(memQueue_in, MemoryMsg, responseFromMemory) {
     if (memQueue_in.isReady()) {
       peek(memQueue_in, MemoryMsg) {
         TBE tbe := TBEs[in_msg.Addr];
@@ -440,73 +441,36 @@ machine(Directory, "Directory protocol")
 
   action(qf_queueMemoryFetchRequest, "qf", desc="Queue off-chip fetch request") {
     peek(requestQueue_in, RequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_READ;
-        out_msg.Sender := machineID;
-        out_msg.OriginalRequestorMachId := in_msg.Requestor;
-        out_msg.MessageSize := in_msg.MessageSize;
-        DPRINTF(RubySlicc,"%s\n", out_msg);
-      }
+      queueMemoryRead(in_msg.Requestor, address, to_memory_controller_latency);
     }
   }
 
   action(qf_queueMemoryFetchRequestDMA, "qfd", desc="Queue off-chip fetch request") {
     peek(dmaRequestQueue_in, DMARequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_READ;
-        out_msg.Sender := machineID;
-        //out_msg.OriginalRequestorMachId := machineID;
-        out_msg.MessageSize := in_msg.MessageSize;
-        DPRINTF(RubySlicc,"%s\n", out_msg);
-      }
+      queueMemoryRead(in_msg.Requestor, address, to_memory_controller_latency);
     }
   }
 
   action(qw_queueMemoryWBRequest_partial, "qwp", desc="Queue off-chip writeback request") {
-     peek(dmaRequestQueue_in, DMARequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_WB;
-        out_msg.DataBlk.copyPartial(
-            in_msg.DataBlk, addressOffset(in_msg.PhysicalAddress), in_msg.Len);
-        out_msg.MessageSize := in_msg.MessageSize;
-        DPRINTF(RubySlicc,"%s\n", out_msg);
-      }
+    peek(dmaRequestQueue_in, DMARequestMsg) {
+      queueMemoryWritePartial(in_msg.Requestor, address,
+                              to_memory_controller_latency, in_msg.DataBlk,
+                              in_msg.Len);
     }
   }
 
   action(qw_queueMemoryWBRequest_partialTBE, "qwt", desc="Queue off-chip writeback request") {
     peek(requestQueue_in, RequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        assert(is_valid(tbe));
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_WB;
-        out_msg.OriginalRequestorMachId := in_msg.Requestor;
-
-        // get incoming data
-        out_msg.DataBlk.copyPartial(
-            tbe.DataBlk, addressOffset(tbe.PhysicalAddress), tbe.Len);
-        out_msg.MessageSize := in_msg.MessageSize;
-        DPRINTF(RubySlicc,"%s\n", out_msg);
-      }
+      queueMemoryWritePartial(in_msg.Requestor, address,
+                              to_memory_controller_latency, tbe.DataBlk,
+                              tbe.Len);
     }
   }
 
-
   action(l_queueMemoryWBRequest, "lq", desc="Write PUTX data to memory") {
     peek(requestQueue_in, RequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_WB;
-        out_msg.Sender := machineID;
-        out_msg.OriginalRequestorMachId := in_msg.Requestor;
-        out_msg.DataBlk := in_msg.DataBlk;
-        out_msg.MessageSize := in_msg.MessageSize;
-
-        DPRINTF(RubySlicc,"%s\n", out_msg);
-      }
+      queueMemoryWrite(in_msg.Requestor, address, to_memory_controller_latency,
+                       in_msg.DataBlk);
     }
   }
 
diff --git a/src/mem/protocol/MOESI_CMP_directory-dir.sm b/src/mem/protocol/MOESI_CMP_directory-dir.sm
index a6b93fa54..3e19897f3 100644
--- a/src/mem/protocol/MOESI_CMP_directory-dir.sm
+++ b/src/mem/protocol/MOESI_CMP_directory-dir.sm
@@ -28,8 +28,8 @@
 
 machine(Directory, "Directory protocol")
 :  DirectoryMemory * directory;
-   MemoryControl * memBuffer;
    Cycles directory_latency := 6;
+   Cycles to_memory_controller_latency := 1;
 
    // Message Queues
    MessageBuffer * requestToDir, network="From", virtual_network="1",
@@ -191,11 +191,13 @@ machine(Directory, "Directory protocol")
   }
 
   void functionalRead(Address addr, Packet *pkt) {
-    memBuffer.functionalRead(pkt);
+    functionalMemoryRead(pkt);
   }
 
   int functionalWrite(Address addr, Packet *pkt) {
-    return memBuffer.functionalWrite(pkt);
+    int num_functional_writes := 0;
+    num_functional_writes := num_functional_writes + functionalMemoryWrite(pkt);
+    return num_functional_writes;
   }
 
   // if no sharers, then directory can be considered
@@ -222,7 +224,6 @@ machine(Directory, "Directory protocol")
   // ** OUT_PORTS **
   out_port(forwardNetwork_out, RequestMsg, forwardFromDir);
   out_port(responseNetwork_out, ResponseMsg, responseFromDir);
-  out_port(memQueue_out, MemoryMsg, memBuffer);
 
   // ** IN_PORTS **
 
@@ -286,7 +287,7 @@ machine(Directory, "Directory protocol")
   }
 
   // off-chip memory request/response is done
-  in_port(memQueue_in, MemoryMsg, memBuffer) {
+  in_port(memQueue_in, MemoryMsg, responseFromMemory) {
     if (memQueue_in.isReady()) {
       peek(memQueue_in, MemoryMsg) {
         if (in_msg.Type == MemoryRequestType:MEMORY_READ) {
@@ -465,41 +466,18 @@ machine(Directory, "Directory protocol")
 
   action(qf_queueMemoryFetchRequest, "qf", desc="Queue off-chip fetch request") {
     peek(requestQueue_in, RequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_READ;
-        out_msg.Sender := machineID;
-        out_msg.OriginalRequestorMachId := in_msg.Requestor;
-        out_msg.MessageSize := in_msg.MessageSize;
-        //out_msg.Prefetch := false;
-        // These are not used by memory but are passed back here with the read data:
-        out_msg.ReadX := (in_msg.Type == CoherenceRequestType:GETS &&
-                          getDirectoryEntry(address).Sharers.count() == 0);
-        out_msg.Acks := getDirectoryEntry(address).Sharers.count();
-        if (getDirectoryEntry(address).Sharers.isElement(in_msg.Requestor)) {
-          out_msg.Acks := out_msg.Acks - 1;
-        }
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryRead(in_msg.Requestor, address, to_memory_controller_latency);
     }
   }
 
   action(qw_queueMemoryWBRequest, "qw", desc="Queue off-chip writeback request") {
     peek(unblockNetwork_in, ResponseMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_WB;
-        out_msg.Sender := machineID;
-        if (is_valid(tbe)) {
-          out_msg.OriginalRequestorMachId := tbe.Requestor;
-        }
-        out_msg.DataBlk := in_msg.DataBlk;
-        out_msg.MessageSize := in_msg.MessageSize;
-        //out_msg.Prefetch := false;
-        // Not used:
-        out_msg.ReadX := false;
-        out_msg.Acks := getDirectoryEntry(address).Sharers.count();  // for dma requests
-        DPRINTF(RubySlicc, "%s\n", out_msg);
+      if (is_valid(tbe)) {
+        queueMemoryWrite(tbe.Requestor, address, to_memory_controller_latency,
+                         in_msg.DataBlk);
+      } else {
+        queueMemoryWrite(in_msg.Sender, address, to_memory_controller_latency,
+                         in_msg.DataBlk);
       }
     }
   }
@@ -507,41 +485,18 @@ machine(Directory, "Directory protocol")
   action(qw_queueMemoryWBRequestFromMessageAndTBE, "qwmt",
     desc="Queue off-chip writeback request") {
     peek(unblockNetwork_in, ResponseMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_WB;
-        out_msg.Sender := machineID;
-        if (is_valid(tbe)) {
-          out_msg.OriginalRequestorMachId := tbe.Requestor;
-        }
-        out_msg.DataBlk := in_msg.DataBlk;
-        out_msg.DataBlk.copyPartial(tbe.DataBlk,
-            addressOffset(tbe.PhysicalAddress), tbe.Len);
-
-        out_msg.MessageSize := in_msg.MessageSize;
-        // Not used:
-        out_msg.ReadX := false;
-        out_msg.Acks := getDirectoryEntry(address).Sharers.count();  // for dma requests
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      DataBlock DataBlk := in_msg.DataBlk;
+      DataBlk.copyPartial(tbe.DataBlk, addressOffset(tbe.PhysicalAddress),
+                          tbe.Len);
+      queueMemoryWrite(tbe.Requestor, address, to_memory_controller_latency,
+                       DataBlk);
     }
   }
 
   action(qw_queueMemoryWBRequest2, "/qw", desc="Queue off-chip writeback request") {
     peek(requestQueue_in, RequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_WB;
-        out_msg.Sender := machineID;
-        out_msg.OriginalRequestorMachId := in_msg.Requestor;
-        out_msg.DataBlk := in_msg.DataBlk;
-        out_msg.MessageSize := in_msg.MessageSize;
-        //out_msg.Prefetch := false;
-        // Not used:
-        out_msg.ReadX := false;
-        out_msg.Acks := getDirectoryEntry(address).Sharers.count();  // for dma requests
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryWrite(in_msg.Requestor, address, to_memory_controller_latency,
+                       in_msg.DataBlk);
     }
   }
 
diff --git a/src/mem/protocol/MOESI_CMP_token-dir.sm b/src/mem/protocol/MOESI_CMP_token-dir.sm
index 8d6abd93c..a70ef6073 100644
--- a/src/mem/protocol/MOESI_CMP_token-dir.sm
+++ b/src/mem/protocol/MOESI_CMP_token-dir.sm
@@ -28,12 +28,12 @@
 
 machine(Directory, "Token protocol")
  : DirectoryMemory * directory;
-   MemoryControl * memBuffer;
    int l2_select_num_bits;
    Cycles directory_latency := 5;
    bool distributed_persistent := "True";
    Cycles fixed_timeout_latency := 100;
    Cycles reissue_wakeup_latency := 10;
+   Cycles to_memory_controller_latency := 1;
 
    // Message Queues from dir to other controllers / network
    MessageBuffer * dmaResponseFromDir, network="To", virtual_network="5",
@@ -148,8 +148,7 @@ machine(Directory, "Token protocol")
   structure(TBE, desc="TBE entries for outstanding DMA requests") {
     Address PhysicalAddress, desc="physical address";
     State TBEState,        desc="Transient State";
-    DataBlock DmaDataBlk,  desc="DMA Data to be written.  Partial blocks need to merged with system memory";
-    DataBlock DataBlk,     desc="The current view of system memory";
+    DataBlock DataBlk,     desc="Current view of the associated address range";
     int Len,               desc="...";
     MachineID DmaRequestor, desc="DMA requestor";
     bool WentPersistent,   desc="Did the DMA request require a persistent request";
@@ -250,17 +249,21 @@ machine(Directory, "Token protocol")
     if(is_valid(tbe)) {
       testAndRead(addr, tbe.DataBlk, pkt);
     } else {
-      memBuffer.functionalRead(pkt);
+      functionalMemoryRead(pkt);
     }
   }
 
   int functionalWrite(Address addr, Packet *pkt) {
+    int num_functional_writes := 0;
+
     TBE tbe := TBEs[addr];
     if(is_valid(tbe)) {
-      testAndWrite(addr, tbe.DataBlk, pkt);
+      num_functional_writes := num_functional_writes +
+            testAndWrite(addr, tbe.DataBlk, pkt);
     }
 
-    return memBuffer.functionalWrite(pkt);
+    num_functional_writes := num_functional_writes + functionalMemoryWrite(pkt);
+    return num_functional_writes;
   }
 
   // ** OUT_PORTS **
@@ -269,15 +272,9 @@ machine(Directory, "Token protocol")
   out_port(requestNetwork_out, RequestMsg, requestFromDir);
   out_port(dmaResponseNetwork_out, DMAResponseMsg, dmaResponseFromDir);
 
-  //
-  // Memory buffer for memory controller to DIMM communication
-  //
-  out_port(memQueue_out, MemoryMsg, memBuffer);
-
   // ** IN_PORTS **
-
   // off-chip memory request/response is done
-  in_port(memQueue_in, MemoryMsg, memBuffer) {
+  in_port(memQueue_in, MemoryMsg, responseFromMemory) {
     if (memQueue_in.isReady()) {
       peek(memQueue_in, MemoryMsg) {
         if (in_msg.Type == MemoryRequestType:MEMORY_READ) {
@@ -653,73 +650,39 @@ machine(Directory, "Token protocol")
 
   action(qf_queueMemoryFetchRequest, "qf", desc="Queue off-chip fetch request") {
     peek(requestNetwork_in, RequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_READ;
-        out_msg.Sender := machineID;
-        out_msg.OriginalRequestorMachId := in_msg.Requestor;
-        out_msg.MessageSize := in_msg.MessageSize;
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryRead(in_msg.Requestor, address, to_memory_controller_latency);
     }
   }
 
   action(qp_queueMemoryForPersistent, "qp", desc="Queue off-chip fetch request") {
-    enqueue(memQueue_out, MemoryMsg, 1) {
-      out_msg.Addr := address;
-      out_msg.Type := MemoryRequestType:MEMORY_READ;
-      out_msg.Sender := machineID;
-      out_msg.OriginalRequestorMachId := persistentTable.findSmallest(address);
-      out_msg.MessageSize := MessageSizeType:Request_Control;
-      DPRINTF(RubySlicc, "%s\n", out_msg);
-    }
+    queueMemoryRead(persistentTable.findSmallest(address), address,
+                    to_memory_controller_latency);
   }
 
   action(fd_memoryDma, "fd", desc="Queue off-chip fetch request") {
     peek(dmaRequestQueue_in, DMARequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_READ;
-        out_msg.Sender := machineID;
-        out_msg.OriginalRequestorMachId := in_msg.Requestor;
-        out_msg.MessageSize := in_msg.MessageSize;
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryRead(in_msg.Requestor, address, to_memory_controller_latency);
     }
   }
 
   action(lq_queueMemoryWbRequest, "lq", desc="Write data to memory") {
     peek(responseNetwork_in, ResponseMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_WB;
-        out_msg.MessageSize := in_msg.MessageSize;
-        out_msg.DataBlk := in_msg.DataBlk;
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryWrite(in_msg.Sender, address, to_memory_controller_latency,
+                       in_msg.DataBlk);
     }
   }
 
   action(ld_queueMemoryDmaWriteFromTbe, "ld", desc="Write DMA data to memory") {
-    enqueue(memQueue_out, MemoryMsg, 1) {
-      out_msg.Addr := address;
-      out_msg.Type := MemoryRequestType:MEMORY_WB;
-      // first, initialize the data blk to the current version of system memory
-      out_msg.DataBlk := tbe.DataBlk;
-      // then add the dma write data
-      out_msg.DataBlk.copyPartial(
-        tbe.DmaDataBlk, addressOffset(tbe.PhysicalAddress), tbe.Len);
-      DPRINTF(RubySlicc, "%s\n", out_msg);
-    }
+    queueMemoryWritePartial(tbe.DmaRequestor, address,
+                            to_memory_controller_latency, tbe.DataBlk,
+                            tbe.Len);
   }
 
-  action(lr_queueMemoryDmaReadWriteback, "lr", desc="Write DMA data from read to memory") {
-    enqueue(memQueue_out, MemoryMsg, 1) {
-      out_msg.Addr := address;
-      out_msg.Type := MemoryRequestType:MEMORY_WB;
-      // first, initialize the data blk to the current version of system memory
-      out_msg.DataBlk := tbe.DataBlk;
-      DPRINTF(RubySlicc, "%s\n", out_msg);
+  action(lr_queueMemoryDmaReadWriteback, "lr",
+         desc="Write DMA data from read to memory") {
+    peek(responseNetwork_in, ResponseMsg) {
+      queueMemoryWrite(machineID, address, to_memory_controller_latency,
+                       in_msg.DataBlk);
     }
   }
 
@@ -727,7 +690,7 @@ machine(Directory, "Token protocol")
     peek(dmaRequestQueue_in, DMARequestMsg) {
       TBEs.allocate(address);
       set_tbe(TBEs[address]);
-      tbe.DmaDataBlk := in_msg.DataBlk;
+      tbe.DataBlk := in_msg.DataBlk;
       tbe.PhysicalAddress := in_msg.PhysicalAddress;
       tbe.Len := in_msg.Len;
       tbe.DmaRequestor := in_msg.Requestor;
@@ -769,7 +732,10 @@ machine(Directory, "Token protocol")
 
   action(rd_recordDataInTbe, "rd", desc="Record data in TBE") {
     peek(responseNetwork_in, ResponseMsg) {
+      DataBlock DataBlk := tbe.DataBlk;
       tbe.DataBlk := in_msg.DataBlk;
+      tbe.DataBlk.copyPartial(DataBlk, addressOffset(tbe.PhysicalAddress),
+                              tbe.Len);
     }
   }
 
diff --git a/src/mem/protocol/MOESI_hammer-dir.sm b/src/mem/protocol/MOESI_hammer-dir.sm
index 43d48c6d2..e04573128 100644
--- a/src/mem/protocol/MOESI_hammer-dir.sm
+++ b/src/mem/protocol/MOESI_hammer-dir.sm
@@ -36,8 +36,8 @@
 machine(Directory, "AMD Hammer-like protocol") 
     : DirectoryMemory * directory;
       CacheMemory * probeFilter;
-      MemoryControl * memBuffer;
-      Cycles memory_controller_latency := 2;
+      Cycles from_memory_controller_latency := 2;
+      Cycles to_memory_controller_latency := 1;
       bool probe_filter_enabled := "False";
       bool full_bit_dir_enabled := "False";
 
@@ -271,17 +271,21 @@ machine(Directory, "AMD Hammer-like protocol")
     if(is_valid(tbe)) {
       testAndRead(addr, tbe.DataBlk, pkt);
     } else {
-      memBuffer.functionalRead(pkt);
+      functionalMemoryRead(pkt);
     }
   }
 
   int functionalWrite(Address addr, Packet *pkt) {
+    int num_functional_writes := 0;
+
     TBE tbe := TBEs[addr];
     if(is_valid(tbe)) {
-      testAndWrite(addr, tbe.DataBlk, pkt);
+      num_functional_writes := num_functional_writes +
+        testAndWrite(addr, tbe.DataBlk, pkt);
     }
 
-    return memBuffer.functionalWrite(pkt);
+    num_functional_writes := num_functional_writes + functionalMemoryWrite(pkt);
+    return num_functional_writes;
   }
 
   Event cache_request_to_event(CoherenceRequestType type) {
@@ -305,11 +309,6 @@ machine(Directory, "AMD Hammer-like protocol")
   out_port(dmaResponseNetwork_out, DMAResponseMsg, dmaResponseFromDir);
   out_port(triggerQueue_out, TriggerMsg, triggerQueue);
   
-  //
-  // Memory buffer for memory controller to DIMM communication
-  //
-  out_port(memQueue_out, MemoryMsg, memBuffer);
-
   // ** IN_PORTS **
   
   // Trigger Queue
@@ -389,7 +388,7 @@ machine(Directory, "AMD Hammer-like protocol")
   }
 
   // off-chip memory request/response is done
-  in_port(memQueue_in, MemoryMsg, memBuffer, rank=2) {
+  in_port(memQueue_in, MemoryMsg, responseFromMemory, rank=2) {
     if (memQueue_in.isReady()) {
       peek(memQueue_in, MemoryMsg) {
         PfEntry pf_entry := getProbeFilterEntry(in_msg.Addr);
@@ -503,7 +502,7 @@ machine(Directory, "AMD Hammer-like protocol")
 
   action(a_sendWriteBackAck, "a", desc="Send writeback ack to requestor") {
     peek(requestQueue_in, RequestMsg) {
-      enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+      enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
         out_msg.Addr := address;
         out_msg.Type := CoherenceRequestType:WB_ACK;
         out_msg.Requestor := in_msg.Requestor;
@@ -516,7 +515,7 @@ machine(Directory, "AMD Hammer-like protocol")
   action(oc_sendBlockAck, "oc", desc="Send block ack to the owner") {
     peek(requestQueue_in, RequestMsg) {
         if (((probe_filter_enabled || full_bit_dir_enabled) && (in_msg.Requestor == cache_entry.Owner)) || machineCount(MachineType:L1Cache) == 1) {
-        enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+        enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
           out_msg.Addr := address;
           out_msg.Type := CoherenceRequestType:BLOCK_ACK;
           out_msg.Requestor := in_msg.Requestor;
@@ -529,7 +528,7 @@ machine(Directory, "AMD Hammer-like protocol")
 
   action(b_sendWriteBackNack, "b", desc="Send writeback nack to requestor") {
     peek(requestQueue_in, RequestMsg) {
-      enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+      enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
         out_msg.Addr := address;
         out_msg.Type := CoherenceRequestType:WB_NACK;
         out_msg.Requestor := in_msg.Requestor;
@@ -847,27 +846,13 @@ machine(Directory, "AMD Hammer-like protocol")
 
   action(qf_queueMemoryFetchRequest, "qf", desc="Queue off-chip fetch request") {
     peek(requestQueue_in, RequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_READ;
-        out_msg.Sender := machineID;
-        out_msg.OriginalRequestorMachId := in_msg.Requestor;
-        out_msg.MessageSize := in_msg.MessageSize;
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryRead(in_msg.Requestor, address, to_memory_controller_latency);
     }
   }
 
   action(qd_queueMemoryRequestFromDmaRead, "qd", desc="Queue off-chip fetch request") {
     peek(dmaRequestQueue_in, DMARequestMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_READ;
-        out_msg.Sender := machineID;
-        out_msg.OriginalRequestorMachId := in_msg.Requestor;
-        out_msg.MessageSize := in_msg.MessageSize;
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryRead(in_msg.Requestor, address, to_memory_controller_latency);
     }
   }
 
@@ -880,7 +865,7 @@ machine(Directory, "AMD Hammer-like protocol")
           fwd_set := cache_entry.Sharers;
           fwd_set.remove(machineIDToNodeID(in_msg.Requestor));
           if (fwd_set.count() > 0) {
-            enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+            enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
               out_msg.Addr := address;
               out_msg.Type := in_msg.Type;
               out_msg.Requestor := in_msg.Requestor;
@@ -895,7 +880,7 @@ machine(Directory, "AMD Hammer-like protocol")
         }
       } else {
         peek(requestQueue_in, RequestMsg) {
-          enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+          enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
             out_msg.Addr := address;
             out_msg.Type := in_msg.Type;
             out_msg.Requestor := in_msg.Requestor;
@@ -915,7 +900,7 @@ machine(Directory, "AMD Hammer-like protocol")
       if (full_bit_dir_enabled) {
         assert(cache_entry.Sharers.count() > 0);
         peek(requestQueue_in, RequestMsg) {
-          enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+          enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
             out_msg.Addr := address;
             out_msg.Type := CoherenceRequestType:INV;
             out_msg.Requestor := machineID;
@@ -924,7 +909,7 @@ machine(Directory, "AMD Hammer-like protocol")
           }
         }
       } else {
-        enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+        enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
           out_msg.Addr := address;
           out_msg.Type := CoherenceRequestType:INV;
           out_msg.Requestor := machineID;
@@ -937,7 +922,7 @@ machine(Directory, "AMD Hammer-like protocol")
 
   action(io_invalidateOwnerRequest, "io", desc="invalidate all copies") {
     if (machineCount(MachineType:L1Cache) > 1) {
-      enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+      enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
         assert(is_valid(cache_entry)); 
         out_msg.Addr := address;
         out_msg.Type := CoherenceRequestType:INV;
@@ -956,7 +941,7 @@ machine(Directory, "AMD Hammer-like protocol")
           fwd_set := cache_entry.Sharers;
           fwd_set.remove(machineIDToNodeID(in_msg.Requestor));
           if (fwd_set.count() > 0) {
-            enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+            enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
                   out_msg.Addr := address;
                   out_msg.Type := in_msg.Type;
                   out_msg.Requestor := in_msg.Requestor;
@@ -969,7 +954,7 @@ machine(Directory, "AMD Hammer-like protocol")
               }
           }
         } else {
-            enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+            enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
                 out_msg.Addr := address;
                 out_msg.Type := in_msg.Type;
                 out_msg.Requestor := in_msg.Requestor;
@@ -1005,7 +990,7 @@ machine(Directory, "AMD Hammer-like protocol")
     // decouple the two.
     //
     peek(unblockNetwork_in, ResponseMsg) {
-      enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+      enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
         assert(is_valid(tbe));
         out_msg.Addr := address;
         out_msg.Type := CoherenceRequestType:MERGED_GETS;
@@ -1026,7 +1011,7 @@ machine(Directory, "AMD Hammer-like protocol")
     assert(machineCount(MachineType:L1Cache) > 1);
     if (probe_filter_enabled || full_bit_dir_enabled) {
       peek(requestQueue_in, RequestMsg) {
-        enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+        enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
           assert(is_valid(cache_entry)); 
           out_msg.Addr := address;
           out_msg.Type := in_msg.Type;
@@ -1040,7 +1025,7 @@ machine(Directory, "AMD Hammer-like protocol")
       }      
     } else {
       peek(requestQueue_in, RequestMsg) {
-        enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+        enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
           out_msg.Addr := address;
           out_msg.Type := in_msg.Type;
           out_msg.Requestor := in_msg.Requestor;
@@ -1060,7 +1045,7 @@ machine(Directory, "AMD Hammer-like protocol")
      if (probe_filter_enabled || full_bit_dir_enabled) {
        peek(requestQueue_in, RequestMsg) {
         if (in_msg.Requestor != cache_entry.Owner) {
-          enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+          enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
             assert(is_valid(cache_entry));
             out_msg.Addr := address;
             out_msg.Type := in_msg.Type;
@@ -1075,7 +1060,7 @@ machine(Directory, "AMD Hammer-like protocol")
        }
      } else {
       peek(requestQueue_in, RequestMsg) {
-        enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+        enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
           out_msg.Addr := address;
           out_msg.Type := in_msg.Type;
           out_msg.Requestor := in_msg.Requestor;
@@ -1094,7 +1079,7 @@ machine(Directory, "AMD Hammer-like protocol")
     assert(is_valid(tbe));
     if (tbe.NumPendingMsgs > 0) {
       peek(dmaRequestQueue_in, DMARequestMsg) {
-        enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+        enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
           out_msg.Addr := address;
           out_msg.Type := CoherenceRequestType:GETX;
           //
@@ -1113,7 +1098,7 @@ machine(Directory, "AMD Hammer-like protocol")
     assert(is_valid(tbe));
     if (tbe.NumPendingMsgs > 0) {
       peek(dmaRequestQueue_in, DMARequestMsg) {
-        enqueue(forwardNetwork_out, RequestMsg, memory_controller_latency) {
+        enqueue(forwardNetwork_out, RequestMsg, from_memory_controller_latency) {
           out_msg.Addr := address;
           out_msg.Type := CoherenceRequestType:GETS;
           //
@@ -1221,38 +1206,21 @@ machine(Directory, "AMD Hammer-like protocol")
 
   action(l_queueMemoryWBRequest, "lq", desc="Write PUTX data to memory") {
     peek(unblockNetwork_in, ResponseMsg) {
-      enqueue(memQueue_out, MemoryMsg, 1) {
-        assert(in_msg.Dirty);
-        assert(in_msg.MessageSize == MessageSizeType:Writeback_Data);
-        out_msg.Addr := address;
-        out_msg.Type := MemoryRequestType:MEMORY_WB;
-        out_msg.DataBlk := in_msg.DataBlk;
-        DPRINTF(RubySlicc, "%s\n", out_msg);
-      }
+      queueMemoryWrite(in_msg.Sender, address, to_memory_controller_latency,
+                       in_msg.DataBlk);
     }
   }
 
   action(ld_queueMemoryDmaWrite, "ld", desc="Write DMA data to memory") {
-    enqueue(memQueue_out, MemoryMsg, 1) {
-      assert(is_valid(tbe));
-      out_msg.Addr := address;
-      out_msg.Type := MemoryRequestType:MEMORY_WB;
-      // first, initialize the data blk to the current version of system memory
-      out_msg.DataBlk := tbe.DataBlk;
-      // then add the dma write data
-      out_msg.DataBlk.copyPartial(tbe.DmaDataBlk, addressOffset(tbe.PhysicalAddress), tbe.Len);
-      DPRINTF(RubySlicc, "%s\n", out_msg);
-    }
+    assert(is_valid(tbe));
+    queueMemoryWritePartial(tbe.DmaRequestor, tbe.PhysicalAddress,
+                            to_memory_controller_latency, tbe.DmaDataBlk,
+                            tbe.Len);
   }
 
   action(ly_queueMemoryWriteFromTBE, "ly", desc="Write data to memory from TBE") {
-    enqueue(memQueue_out, MemoryMsg, 1) {
-      assert(is_valid(tbe));
-      out_msg.Addr := address;
-      out_msg.Type := MemoryRequestType:MEMORY_WB;
-      out_msg.DataBlk := tbe.DataBlk;
-      DPRINTF(RubySlicc, "%s\n", out_msg);
-    }
+    queueMemoryWrite(machineID, address, to_memory_controller_latency,
+                     tbe.DataBlk);
   }
 
   action(ll_checkIncomingWriteback, "\l", desc="Check PUTX/PUTO response message") {
diff --git a/src/mem/protocol/RubySlicc_Defines.sm b/src/mem/protocol/RubySlicc_Defines.sm
index 1480790bf..514a307df 100644
--- a/src/mem/protocol/RubySlicc_Defines.sm
+++ b/src/mem/protocol/RubySlicc_Defines.sm
@@ -31,3 +31,19 @@
 NodeID version;
 MachineID machineID;
 NodeID clusterID;
+MessageBuffer responseFromMemory, ordered="false";
+
+// Functions implemented in the AbstractController class for
+// making timing access to the memory maintained by the
+// memory controllers.
+void queueMemoryRead(MachineID id, Address addr, Cycles latency);
+void queueMemoryWrite(MachineID id, Address addr, Cycles latency,
+                      DataBlock block);
+void queueMemoryWritePartial(MachineID id, Address addr, Cycles latency,
+                             DataBlock block, int size);
+
+// Functions implemented in the AbstractController class for
+// making functional access to the memory maintained by the
+// memory controllers.
+void functionalMemoryRead(Packet *pkt);
+bool functionalMemoryWrite(Packet *pkt);
diff --git a/src/mem/protocol/RubySlicc_Types.sm b/src/mem/protocol/RubySlicc_Types.sm
index 2d0658e68..fb506781c 100644
--- a/src/mem/protocol/RubySlicc_Types.sm
+++ b/src/mem/protocol/RubySlicc_Types.sm
@@ -161,12 +161,6 @@ structure (WireBuffer, inport="yes", outport="yes", external = "yes") {
 
 }
 
-structure (MemoryControl, inport="yes", outport="yes", external = "yes") {
-  void recordRequestType(CacheRequestType);
-  void functionalRead(Packet *pkt);
-  int functionalWrite(Packet *pkt);
-}
-
 structure (DMASequencer, external = "yes") {
   void ackCallback();
   void dataCallback(DataBlock);
diff --git a/src/mem/ruby/SConscript b/src/mem/ruby/SConscript
index 4200ddaeb..8133820b9 100644
--- a/src/mem/ruby/SConscript
+++ b/src/mem/ruby/SConscript
@@ -126,7 +126,6 @@ MakeInclude('structures/Prefetcher.hh')
 MakeInclude('structures/CacheMemory.hh')
 MakeInclude('system/DMASequencer.hh')
 MakeInclude('structures/DirectoryMemory.hh')
-MakeInclude('structures/MemoryControl.hh')
 MakeInclude('structures/WireBuffer.hh')
 MakeInclude('structures/PerfectCacheMemory.hh')
 MakeInclude('structures/PersistentTable.hh')
diff --git a/src/mem/ruby/network/MessageBuffer.cc b/src/mem/ruby/network/MessageBuffer.cc
index 1bc55c2c9..57a8d5519 100644
--- a/src/mem/ruby/network/MessageBuffer.cc
+++ b/src/mem/ruby/network/MessageBuffer.cc
@@ -144,16 +144,16 @@ random_time()
 void
 MessageBuffer::enqueue(MsgPtr message, Cycles delta)
 {
-    m_msg_counter++;
+    assert(m_ordering_set);
 
     // record current time incase we have a pop that also adjusts my size
     if (m_time_last_time_enqueue < m_sender->curCycle()) {
         m_msgs_this_cycle = 0;  // first msg this cycle
         m_time_last_time_enqueue = m_sender->curCycle();
     }
-    m_msgs_this_cycle++;
 
-    assert(m_ordering_set);
+    m_msg_counter++;
+    m_msgs_this_cycle++;
 
     // Calculate the arrival time of the message, that is, the first
     // cycle the message can be dequeued.
diff --git a/src/mem/ruby/slicc_interface/AbstractController.cc b/src/mem/ruby/slicc_interface/AbstractController.cc
index 366ea04ce..6bcbfbcbf 100644
--- a/src/mem/ruby/slicc_interface/AbstractController.cc
+++ b/src/mem/ruby/slicc_interface/AbstractController.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011 Mark D. Hill and David A. Wood
+ * Copyright (c) 2011-2014 Mark D. Hill and David A. Wood
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,21 +26,28 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "mem/protocol/MemoryMsg.hh"
 #include "mem/ruby/slicc_interface/AbstractController.hh"
 #include "mem/ruby/system/Sequencer.hh"
 #include "mem/ruby/system/System.hh"
+#include "sim/system.hh"
 
 AbstractController::AbstractController(const Params *p)
-    : ClockedObject(p), Consumer(this)
+    : MemObject(p), Consumer(this), m_version(p->version),
+      m_clusterID(p->cluster_id),
+      m_masterId(p->system->getMasterId(name())), m_is_blocking(false),
+      m_number_of_TBEs(p->number_of_TBEs),
+      m_transitions_per_cycle(p->transitions_per_cycle),
+      m_buffer_size(p->buffer_size), m_recycle_latency(p->recycle_latency),
+      memoryPort(csprintf("%s.memory", name()), this, ""),
+      m_responseFromMemory_ptr(new MessageBuffer())
 {
-    m_version = p->version;
-    m_clusterID = p->cluster_id;
-
-    m_transitions_per_cycle = p->transitions_per_cycle;
-    m_buffer_size = p->buffer_size;
-    m_recycle_latency = p->recycle_latency;
-    m_number_of_TBEs = p->number_of_TBEs;
-    m_is_blocking = false;
+    // Set the sender pointer of the response message buffer from the
+    // memory controller.
+    // This pointer is used for querying for the current time.
+    m_responseFromMemory_ptr->setSender(this);
+    m_responseFromMemory_ptr->setReceiver(this);
+    m_responseFromMemory_ptr->setOrdering(false);
 
     if (m_version == 0) {
         // Combine the statistics from all controllers
@@ -187,3 +194,140 @@ AbstractController::unblock(Address addr)
        m_is_blocking = false;
     }
 }
+
+BaseMasterPort &
+AbstractController::getMasterPort(const std::string &if_name,
+                                  PortID idx)
+{
+    return memoryPort;
+}
+
+void
+AbstractController::queueMemoryRead(const MachineID &id, Address addr,
+                                    Cycles latency)
+{
+    RequestPtr req = new Request(addr.getAddress(),
+                                 RubySystem::getBlockSizeBytes(), 0,
+                                 m_masterId);
+
+    PacketPtr pkt = Packet::createRead(req);
+    uint8_t *newData = new uint8_t[RubySystem::getBlockSizeBytes()];
+    pkt->dataDynamic(newData);
+
+    SenderState *s = new SenderState(id);
+    pkt->pushSenderState(s);
+
+    memoryPort.schedTimingReq(pkt, clockEdge(latency));
+}
+
+void
+AbstractController::queueMemoryWrite(const MachineID &id, Address addr,
+                                     Cycles latency, const DataBlock &block)
+{
+    RequestPtr req = new Request(addr.getAddress(),
+                                 RubySystem::getBlockSizeBytes(), 0,
+                                 m_masterId);
+
+    PacketPtr pkt = Packet::createWrite(req);
+    uint8_t *newData = new uint8_t[RubySystem::getBlockSizeBytes()];
+    pkt->dataDynamic(newData);
+    memcpy(newData, block.getData(0, RubySystem::getBlockSizeBytes()),
+           RubySystem::getBlockSizeBytes());
+
+    SenderState *s = new SenderState(id);
+    pkt->pushSenderState(s);
+
+    // Create a block and copy data from the block.
+    memoryPort.schedTimingReq(pkt, clockEdge(latency));
+}
+
+void
+AbstractController::queueMemoryWritePartial(const MachineID &id, Address addr,
+                                            Cycles latency,
+                                            const DataBlock &block, int size)
+{
+    RequestPtr req = new Request(addr.getAddress(),
+                                 RubySystem::getBlockSizeBytes(), 0,
+                                 m_masterId);
+
+    PacketPtr pkt = Packet::createWrite(req);
+    uint8_t *newData = new uint8_t[size];
+    pkt->dataDynamic(newData);
+    memcpy(newData, block.getData(addr.getOffset(), size), size);
+
+    SenderState *s = new SenderState(id);
+    pkt->pushSenderState(s);
+
+    // Create a block and copy data from the block.
+    memoryPort.schedTimingReq(pkt, clockEdge(latency));
+}
+
+void
+AbstractController::functionalMemoryRead(PacketPtr pkt)
+{
+    memoryPort.sendFunctional(pkt);
+}
+
+int
+AbstractController::functionalMemoryWrite(PacketPtr pkt)
+{
+    int num_functional_writes = 0;
+
+    // Check the message buffer that runs from the memory to the controller.
+    num_functional_writes += m_responseFromMemory_ptr->functionalWrite(pkt);
+
+    // Check the buffer from the controller to the memory.
+    if (memoryPort.checkFunctional(pkt)) {
+        num_functional_writes++;
+    }
+
+    // Update memory itself.
+    memoryPort.sendFunctional(pkt);
+    return num_functional_writes + 1;
+}
+
+void
+AbstractController::recvTimingResp(PacketPtr pkt)
+{
+    assert(pkt->isResponse());
+
+    std::shared_ptr<MemoryMsg> msg = std::make_shared<MemoryMsg>(clockEdge());
+    (*msg).m_Addr.setAddress(pkt->getAddr());
+    (*msg).m_Sender = m_machineID;
+
+    SenderState *s = dynamic_cast<SenderState *>(pkt->senderState);
+    (*msg).m_OriginalRequestorMachId = s->id;
+    delete s;
+
+    if (pkt->isRead()) {
+        (*msg).m_Type = MemoryRequestType_MEMORY_READ;
+        (*msg).m_MessageSize = MessageSizeType_Response_Data;
+
+        // Copy data from the packet
+        (*msg).m_DataBlk.setData(pkt->getPtr<uint8_t>(), 0,
+                                 RubySystem::getBlockSizeBytes());
+    } else if (pkt->isWrite()) {
+        (*msg).m_Type = MemoryRequestType_MEMORY_WB;
+        (*msg).m_MessageSize = MessageSizeType_Writeback_Control;
+    } else {
+        panic("Incorrect packet type received from memory controller!");
+    }
+
+    m_responseFromMemory_ptr->enqueue(msg);
+    delete pkt;
+}
+
+bool
+AbstractController::MemoryPort::recvTimingResp(PacketPtr pkt)
+{
+    controller->recvTimingResp(pkt);
+    return true;
+}
+
+AbstractController::MemoryPort::MemoryPort(const std::string &_name,
+                                           AbstractController *_controller,
+                                           const std::string &_label)
+    : QueuedMasterPort(_name, _controller, _queue),
+      _queue(*_controller, *this, _label), controller(_controller)
+{
+}
diff --git a/src/mem/ruby/slicc_interface/AbstractController.hh b/src/mem/ruby/slicc_interface/AbstractController.hh
index 98fce574f..45d355b3e 100644
--- a/src/mem/ruby/slicc_interface/AbstractController.hh
+++ b/src/mem/ruby/slicc_interface/AbstractController.hh
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009 Mark D. Hill and David A. Wood
+ * Copyright (c) 2009-2014 Mark D. Hill and David A. Wood
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -43,12 +43,13 @@
 #include "mem/ruby/network/Network.hh"
 #include "mem/ruby/system/CacheRecorder.hh"
 #include "mem/packet.hh"
+#include "mem/qport.hh"
 #include "params/RubyController.hh"
-#include "sim/clocked_object.hh"
+#include "mem/mem_object.hh"
 
 class Network;
 
-class AbstractController : public ClockedObject, public Consumer
+class AbstractController : public MemObject, public Consumer
 {
   public:
     typedef RubyControllerParams Params;
@@ -79,10 +80,12 @@ class AbstractController : public ClockedObject, public Consumer
     //! These functions are used by ruby system to read/write the data blocks
     //! that exist with in the controller.
     virtual void functionalRead(const Address &addr, PacketPtr) = 0;
+    void functionalMemoryRead(PacketPtr);
     //! The return value indicates the number of messages written with the
     //! data from the packet.
-    virtual uint32_t functionalWriteBuffers(PacketPtr&) = 0;
+    virtual int functionalWriteBuffers(PacketPtr&) = 0;
     virtual int functionalWrite(const Address &addr, PacketPtr) = 0;
+    int functionalMemoryWrite(PacketPtr);
 
     //! Function for enqueuing a prefetch request
     virtual void enqueuePrefetch(const Address&, const RubyRequestType&)
@@ -97,6 +100,17 @@ class AbstractController : public ClockedObject, public Consumer
     //! Set the message buffer with given name.
     virtual void setNetQueue(const std::string& name, MessageBuffer *b) = 0;
 
+    /** A function used to return the port associated with this bus object. */
+    BaseMasterPort& getMasterPort(const std::string& if_name,
+                                  PortID idx = InvalidPortID);
+
+    void queueMemoryRead(const MachineID &id, Address addr, Cycles latency);
+    void queueMemoryWrite(const MachineID &id, Address addr, Cycles latency,
+                          const DataBlock &block);
+    void queueMemoryWritePartial(const MachineID &id, Address addr, Cycles latency,
+                                 const DataBlock &block, int size);
+    void recvTimingResp(PacketPtr pkt);
+
   public:
     MachineID getMachineID() const { return m_machineID; }
 
@@ -120,6 +134,9 @@ class AbstractController : public ClockedObject, public Consumer
     MachineID m_machineID;
     NodeID m_clusterID;
 
+    // MasterID used by some components of gem5.
+    MasterID m_masterId;
+
     Network* m_net_ptr;
     bool m_is_blocking;
     std::map<Address, MessageBuffer*> m_block_map;
@@ -156,6 +173,46 @@ class AbstractController : public ClockedObject, public Consumer
         StatsCallback(AbstractController *_ctr) : ctr(_ctr) {}
         void process() {ctr->collateStats();}
     };
+
+    /**
+     * Port that forwards requests and receives responses from the
+     * memory controller.  It has a queue of packets not yet sent.
+     */
+    class MemoryPort : public QueuedMasterPort
+    {
+      private:
+        // Packet queue used to store outgoing requests and responses.
+        MasterPacketQueue _queue;
+
+        // Controller that operates this port.
+        AbstractController *controller;
+
+      public:
+        MemoryPort(const std::string &_name, AbstractController *_controller,
+                   const std::string &_label);
+
+        // Function for receiving a timing response from the peer port.
+        // Currently the pkt is handed to the coherence controller
+        // associated with this port.
+        bool recvTimingResp(PacketPtr pkt);
+    };
+
+    /* Master port to the memory controller. */
+    MemoryPort memoryPort;
+
+    // Message Buffer for storing the response received from the
+    // memory controller.
+    MessageBuffer *m_responseFromMemory_ptr;
+
+    // State that is stored in packets sent to the memory controller.
+    struct SenderState : public Packet::SenderState
+    {
+        // Id of the machine from which the request originated.
+        MachineID id;
+
+        SenderState(MachineID _id) : id(_id)
+        {}
+    };
 };
 
 #endif // __MEM_RUBY_SLICC_INTERFACE_ABSTRACTCONTROLLER_HH__
diff --git a/src/mem/ruby/slicc_interface/Controller.py b/src/mem/ruby/slicc_interface/Controller.py
index f82e0a70d..ba7d17c7c 100644
--- a/src/mem/ruby/slicc_interface/Controller.py
+++ b/src/mem/ruby/slicc_interface/Controller.py
@@ -28,9 +28,10 @@
 #          Brad Beckmann
 
 from m5.params import *
-from ClockedObject import ClockedObject
+from m5.proxy import *
+from MemObject import MemObject
 
-class RubyController(ClockedObject):
+class RubyController(MemObject):
     type = 'RubyController'
     cxx_class = 'AbstractController'
     cxx_header = "mem/ruby/slicc_interface/AbstractController.hh"
@@ -46,4 +47,5 @@ class RubyController(ClockedObject):
     number_of_TBEs = Param.Int(256, "")
     ruby_system = Param.RubySystem("")
 
-    peer = Param.RubyController(NULL, "")
+    memory = MasterPort("Port for attaching a memory controller")
+    system = Param.System(Parent.any, "system object parameter")
diff --git a/src/mem/ruby/structures/Cache.py b/src/mem/ruby/structures/Cache.py
index 14a359233..c6e165e3a 100644
--- a/src/mem/ruby/structures/Cache.py
+++ b/src/mem/ruby/structures/Cache.py
@@ -29,7 +29,6 @@
 
 from m5.params import *
 from m5.SimObject import SimObject
-from Controller import RubyController
 
 class RubyCache(SimObject):
     type = 'RubyCache'
diff --git a/src/mem/ruby/structures/DirectoryMemory.py b/src/mem/ruby/structures/DirectoryMemory.py
index c64439ce5..bb9765bdb 100644
--- a/src/mem/ruby/structures/DirectoryMemory.py
+++ b/src/mem/ruby/structures/DirectoryMemory.py
@@ -37,8 +37,6 @@ class RubyDirectoryMemory(SimObject):
     cxx_header = "mem/ruby/structures/DirectoryMemory.hh"
     version = Param.Int(0, "")
     size = Param.MemorySize("1GB", "capacity in bytes")
-    use_map = Param.Bool(False, "enable sparse memory")
-    map_levels = Param.Int(4, "sparse memory map levels")
     # the default value of the numa high bit is specified in the command line
     # option and must be passed into the directory memory sim object
     numa_high_bit = Param.Int("numa high bit")
diff --git a/src/mem/ruby/structures/MemoryControl.cc b/src/mem/ruby/structures/MemoryControl.cc
deleted file mode 100644
index 6c933b4d4..000000000
--- a/src/mem/ruby/structures/MemoryControl.cc
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
- * Copyright (c) 2012 Advanced Micro Devices, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "debug/RubyStats.hh"
-#include "mem/ruby/common/Global.hh"
-#include "mem/ruby/slicc_interface/RubySlicc_ComponentMapping.hh"
-#include "mem/ruby/structures/MemoryControl.hh"
-#include "mem/ruby/system/System.hh"
-
-using namespace std;
-MemoryControl::MemoryControl(const Params *p)
-    : ClockedObject(p), Consumer(this), m_event(this)
-{
-    g_system_ptr->registerMemController(this);
-}
-
-MemoryControl::~MemoryControl() {};
-
-void
-MemoryControl::recordRequestType(MemoryControlRequestType request) {
-    DPRINTF(RubyStats, "Recorded request: %s\n",
-            MemoryControlRequestType_to_string(request));
-}
diff --git a/src/mem/ruby/structures/MemoryControl.hh b/src/mem/ruby/structures/MemoryControl.hh
deleted file mode 100644
index b1cbe982f..000000000
--- a/src/mem/ruby/structures/MemoryControl.hh
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
- * Copyright (c) 2012 Advanced Micro Devices, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef __MEM_RUBY_STRUCTURES_ABSTRACT_MEMORY_CONTROL_HH__
-#define __MEM_RUBY_STRUCTURES_ABSTRACT_MEMORY_CONTROL_HH__
-
-#include <iostream>
-#include <list>
-#include <string>
-
-#include "mem/protocol/MemoryControlRequestType.hh"
-#include "mem/ruby/common/Consumer.hh"
-#include "mem/ruby/slicc_interface/Message.hh"
-#include "mem/ruby/structures/MemoryNode.hh"
-#include "params/MemoryControl.hh"
-#include "sim/clocked_object.hh"
-
-//////////////////////////////////////////////////////////////////////////////
-
-class MemoryControl : public ClockedObject, public Consumer
-{
-  public:
-    typedef MemoryControlParams Params;
-    const Params *params() const
-    { return dynamic_cast<const Params *>(_params); }
-
-    MemoryControl(const Params *p);
-    virtual void init() = 0;
-    virtual void reset() = 0;
-
-    ~MemoryControl();
-
-    virtual void wakeup() = 0;
-
-    virtual void setConsumer(Consumer* consumer_ptr) = 0;
-    virtual Consumer* getConsumer() = 0;
-    virtual void setClockObj(ClockedObject* consumer_ptr) {}
-
-    virtual void setDescription(const std::string& name) = 0;
-    virtual std::string getDescription() = 0;
-
-    // Called from the directory:
-    virtual void enqueue(const MsgPtr& message, Cycles latency) = 0;
-    virtual void enqueueMemRef(MemoryNode *memRef) = 0;
-    virtual void dequeue() = 0;
-    virtual const Message* peek() = 0;
-    virtual MemoryNode *peekNode() = 0;
-    virtual bool isReady() = 0;
-    virtual bool areNSlotsAvailable(int n) = 0;  // infinite queue length
-
-    virtual void print(std::ostream& out) const = 0;
-    virtual void regStats() {};
-
-    virtual const int getChannel(const physical_address_t addr) const = 0;
-    virtual const int getBank(const physical_address_t addr) const = 0;
-    virtual const int getRank(const physical_address_t addr) const = 0;
-    virtual const int getRow(const physical_address_t addr) const = 0;
-
-    //added by SS
-    virtual int getBanksPerRank() = 0;
-    virtual int getRanksPerDimm() = 0;
-    virtual int getDimmsPerChannel() = 0;
-
-    virtual void recordRequestType(MemoryControlRequestType requestType);
-
-    virtual bool functionalRead(Packet *pkt)
-    { fatal("Functional read access not implemented!");}
-    virtual uint32_t functionalWrite(Packet *pkt)
-    { fatal("Functional read access not implemented!");}
-
-protected:
-    class MemCntrlEvent : public Event
-    {
-      public:
-        MemCntrlEvent(MemoryControl* _mem_cntrl)
-        {
-            mem_cntrl = _mem_cntrl;
-        }
-      private:
-        void process() { mem_cntrl->wakeup(); }
-
-        MemoryControl* mem_cntrl;
-    };
-
-    MemCntrlEvent m_event;
-};
-
-#endif //   __MEM_RUBY_STRUCTURES_ABSTRACT_MEMORY_CONTROL_HH__
diff --git a/src/mem/ruby/structures/MemoryControl.py b/src/mem/ruby/structures/MemoryControl.py
deleted file mode 100644
index 8a6879cb9..000000000
--- a/src/mem/ruby/structures/MemoryControl.py
+++ /dev/null
@@ -1,39 +0,0 @@
-# Copyright (c) 2009 Advanced Micro Devices, Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met: redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer;
-# redistributions in binary form must reproduce the above copyright
-# notice, this list of conditions and the following disclaimer in the
-# documentation and/or other materials provided with the distribution;
-# neither the name of the copyright holders nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-# Authors: Steve Reinhardt
-#          Brad Beckmann
-
-from m5.params import *
-from ClockedObject import ClockedObject
-
-class MemoryControl(ClockedObject):
-    abstract = True
-    type = 'MemoryControl'
-    cxx_class = 'MemoryControl'
-    cxx_header = "mem/ruby/structures/MemoryControl.hh"
-    version = Param.Int("");
-    ruby_system = Param.RubySystem("")
diff --git a/src/mem/ruby/structures/MemoryNode.cc b/src/mem/ruby/structures/MemoryNode.cc
index 2a5cbb189..1e68cc459 100644
--- a/src/mem/ruby/structures/MemoryNode.cc
+++ b/src/mem/ruby/structures/MemoryNode.cc
@@ -36,6 +36,6 @@ MemoryNode::print(ostream& out) const
     out << "[";
     out << m_time << ", ";
     out << m_msg_counter << ", ";
-    out << m_msgptr << "; ";
+    out << pkt << "; ";
     out << "]";
 }
diff --git a/src/mem/ruby/structures/MemoryNode.hh b/src/mem/ruby/structures/MemoryNode.hh
index 3f40e3648..b48f64704 100644
--- a/src/mem/ruby/structures/MemoryNode.hh
+++ b/src/mem/ruby/structures/MemoryNode.hh
@@ -47,25 +47,23 @@ class MemoryNode
 {
   public:
     // old constructor
-    MemoryNode(const Cycles& time, int counter, const MsgPtr& msgptr,
+    MemoryNode(const Cycles& time, int counter, const PacketPtr p,
                const physical_address_t addr, const bool is_mem_read)
-        : m_time(time)
+        : m_time(time), pkt(p)
     {
         m_msg_counter = counter;
-        m_msgptr = msgptr;
         m_addr = addr;
         m_is_mem_read = is_mem_read;
         m_is_dirty_wb = !is_mem_read;
     }
 
     // new constructor
-    MemoryNode(const Cycles& time, const MsgPtr& msgptr,
+    MemoryNode(const Cycles& time, const PacketPtr p,
                const physical_address_t addr, const bool is_mem_read,
                const bool is_dirty_wb)
-        : m_time(time)
+        : m_time(time), pkt(p)
     {
         m_msg_counter = 0;
-        m_msgptr = msgptr;
         m_addr = addr;
         m_is_mem_read = is_mem_read;
         m_is_dirty_wb = is_dirty_wb;
@@ -75,7 +73,7 @@ class MemoryNode
 
     Cycles m_time;
     int m_msg_counter;
-    MsgPtr m_msgptr;
+    PacketPtr pkt;
     physical_address_t m_addr;
     bool m_is_mem_read;
     bool m_is_dirty_wb;
diff --git a/src/mem/ruby/structures/MemoryVector.hh b/src/mem/ruby/structures/MemoryVector.hh
deleted file mode 100644
index 384c68ad6..000000000
--- a/src/mem/ruby/structures/MemoryVector.hh
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- * Copyright (c) 2009 Mark D. Hill and David A. Wood
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef __MEM_RUBY_STRUCTURES_MEMORYVECTOR_HH__
-#define __MEM_RUBY_STRUCTURES_MEMORYVECTOR_HH__
-
-#include "base/trace.hh"
-#include "debug/RubyCacheTrace.hh"
-#include "mem/ruby/common/Address.hh"
-
-class DirectoryMemory;
-
-/**
- *  MemoryVector holds memory data (DRAM only)
- */
-class MemoryVector
-{
-  public:
-    MemoryVector();
-    MemoryVector(uint64 size);
-    ~MemoryVector();
-    friend class DirectoryMemory;
-
-    void resize(uint64 size);  // destructive
-
-    void write(const Address & paddr, uint8_t *data, int len);
-    uint8_t *read(const Address & paddr, uint8_t *data, int len);
-    uint32_t collatePages(uint8_t *&raw_data);
-    void populatePages(uint8_t *raw_data);
-
-  private:
-    uint8_t *getBlockPtr(const PhysAddress & addr);
-
-    uint64 m_size;
-    uint8_t **m_pages;
-    uint32_t m_num_pages;
-    const uint32_t m_page_offset_mask;
-    static const uint32_t PAGE_SIZE = 4096;
-};
-
-inline
-MemoryVector::MemoryVector()
-    : m_page_offset_mask(4095)
-{
-    m_size = 0;
-    m_num_pages = 0;
-    m_pages = NULL;
-}
-
-inline
-MemoryVector::MemoryVector(uint64 size)
-    : m_page_offset_mask(4095)
-{
-    resize(size);
-}
-
-inline
-MemoryVector::~MemoryVector()
-{
-    for (int i = 0; i < m_num_pages; i++) {
-        if (m_pages[i] != 0) {
-            delete [] m_pages[i];
-        }
-    }
-    delete [] m_pages;
-}
-
-inline void
-MemoryVector::resize(uint64 size)
-{
-    if (m_pages != NULL){
-        for (int i = 0; i < m_num_pages; i++) {
-            if (m_pages[i] != 0) {
-                delete [] m_pages[i];
-            }
-        }
-        delete [] m_pages;
-    }
-    m_size = size;
-    assert(size%PAGE_SIZE == 0);
-    m_num_pages = size >> 12;
-    m_pages = new uint8_t*[m_num_pages];
-    memset(m_pages, 0, m_num_pages * sizeof(uint8_t*));
-}
-
-inline void
-MemoryVector::write(const Address & paddr, uint8_t *data, int len)
-{
-    assert(paddr.getAddress() + len <= m_size);
-    uint32_t page_num = paddr.getAddress() >> 12;
-    if (m_pages[page_num] == 0) {
-        bool all_zeros = true;
-        for (int i = 0; i < len;i++) {
-            if (data[i] != 0) {
-                all_zeros = false;
-                break;
-            }
-        }
-        if (all_zeros)
-            return;
-        m_pages[page_num] = new uint8_t[PAGE_SIZE];
-        memset(m_pages[page_num], 0, PAGE_SIZE);
-        uint32_t offset = paddr.getAddress() & m_page_offset_mask;
-        memcpy(&m_pages[page_num][offset], data, len);
-    } else {
-        memcpy(&m_pages[page_num][paddr.getAddress()&m_page_offset_mask],
-               data, len);
-    }
-}
-
-inline uint8_t*
-MemoryVector::read(const Address & paddr, uint8_t *data, int len)
-{
-    assert(paddr.getAddress() + len <= m_size);
-    uint32_t page_num = paddr.getAddress() >> 12;
-    if (m_pages[page_num] == 0) {
-        memset(data, 0, len);
-    } else {
-        memcpy(data, &m_pages[page_num][paddr.getAddress()&m_page_offset_mask],
-               len);
-    }
-    return data;
-}
-
-inline uint8_t*
-MemoryVector::getBlockPtr(const PhysAddress & paddr)
-{
-    uint32_t page_num = paddr.getAddress() >> 12;
-    if (m_pages[page_num] == 0) {
-        m_pages[page_num] = new uint8_t[PAGE_SIZE];
-        memset(m_pages[page_num], 0, PAGE_SIZE);
-    }
-    return &m_pages[page_num][paddr.getAddress()&m_page_offset_mask];
-}
-
-/*!
- * Function for collating all the pages of the physical memory together.
- * In case a pointer for a page is NULL, this page needs only a single byte
- * to represent that the pointer is NULL. Otherwise, it needs 1 + PAGE_SIZE
- * bytes. The first represents that the page pointer is not NULL, and rest of
- * the bytes represent the data on the page.
- */
-
-inline uint32_t
-MemoryVector::collatePages(uint8_t *&raw_data)
-{
-    uint32_t num_zero_pages = 0;
-    uint32_t data_size = 0;
-
-    for (uint32_t i = 0;i < m_num_pages; ++i)
-    {
-        if (m_pages[i] == 0) num_zero_pages++;
-    }
-
-    raw_data = new uint8_t[sizeof(uint32_t) /* number of pages*/ +
-                           m_num_pages /* whether the page is all zeros */ +
-                           PAGE_SIZE * (m_num_pages - num_zero_pages)];
-
-    /* Write the number of pages to be stored. */
-    memcpy(raw_data, &m_num_pages, sizeof(uint32_t));
-    data_size = sizeof(uint32_t);
-
-    DPRINTF(RubyCacheTrace, "collating %d pages\n", m_num_pages);
-
-    for (uint32_t i = 0;i < m_num_pages; ++i)
-    {
-        if (m_pages[i] == 0) {
-            raw_data[data_size] = 0;
-        } else {
-            raw_data[data_size] = 1;
-            memcpy(raw_data + data_size + 1, m_pages[i], PAGE_SIZE);
-            data_size += PAGE_SIZE;
-        }
-        data_size += 1;
-    }
-
-    return data_size;
-}
-
-/*!
- * Function for populating the pages of the memory using the available raw
- * data. Each page has a byte associate with it, which represents whether the
- * page was NULL or not, when all the pages were collated. The function assumes
- * that the number of pages in the memory are same as those that were recorded
- * in the checkpoint.
- */
-inline void
-MemoryVector::populatePages(uint8_t *raw_data)
-{
-    uint32_t data_size = 0;
-    uint32_t num_pages = 0;
-
-    /* Read the number of pages that were stored. */
-    memcpy(&num_pages, raw_data, sizeof(uint32_t));
-    data_size = sizeof(uint32_t);
-    assert(num_pages == m_num_pages);
-
-    DPRINTF(RubyCacheTrace, "Populating %d pages\n", num_pages);
-
-    for (uint32_t i = 0;i < m_num_pages; ++i)
-    {
-        assert(m_pages[i] == 0);
-        if (raw_data[data_size] != 0) {
-            m_pages[i] = new uint8_t[PAGE_SIZE];
-            memcpy(m_pages[i], raw_data + data_size + 1, PAGE_SIZE);
-            data_size += PAGE_SIZE;
-        }
-        data_size += 1;
-    }
-}
-
-#endif // __MEM_RUBY_STRUCTURES_MEMORYVECTOR_HH__
diff --git a/src/mem/ruby/structures/RubyMemoryControl.cc b/src/mem/ruby/structures/RubyMemoryControl.cc
index 2e71c0c2f..a7a815adb 100644
--- a/src/mem/ruby/structures/RubyMemoryControl.cc
+++ b/src/mem/ruby/structures/RubyMemoryControl.cc
@@ -145,7 +145,8 @@ operator<<(ostream& out, const RubyMemoryControl& obj)
 
 // CONSTRUCTOR
 RubyMemoryControl::RubyMemoryControl(const Params *p)
-    : MemoryControl(p)
+    : AbstractMemory(p), Consumer(this), port(name() + ".port", *this),
+      m_event(this)
 {
     m_banks_per_rank = p->banks_per_rank;
     m_ranks_per_dimm = p->ranks_per_dimm;
@@ -173,9 +174,7 @@ RubyMemoryControl::RubyMemoryControl(const Params *p)
 void
 RubyMemoryControl::init()
 {
-    m_ram = g_system_ptr->getMemoryVector();
     m_msg_counter = 0;
-
     assert(m_tFaw <= 62); // must fit in a uint64 shift register
 
     m_total_banks = m_banks_per_rank * m_ranks_per_dimm * m_dimms_per_channel;
@@ -221,6 +220,16 @@ RubyMemoryControl::init()
     }
 }
 
+BaseSlavePort&
+RubyMemoryControl::getSlavePort(const string &if_name, PortID idx)
+{
+    if (if_name != "port") {
+        return MemObject::getSlavePort(if_name, idx);
+    } else {
+        return port;
+    }
+}
+
 void
 RubyMemoryControl::reset()
 {
@@ -275,30 +284,18 @@ RubyMemoryControl::~RubyMemoryControl()
 }
 
 // enqueue new request from directory
-void
-RubyMemoryControl::enqueue(const MsgPtr& message, Cycles latency)
+bool
+RubyMemoryControl::recvTimingReq(PacketPtr pkt)
 {
-    Cycles arrival_time = curCycle() + latency;
-    const MemoryMsg* memMess = safe_cast<const MemoryMsg*>(message.get());
-    physical_address_t addr = memMess->getAddr().getAddress();
-    MemoryRequestType type = memMess->getType();
-    bool is_mem_read = (type == MemoryRequestType_MEMORY_READ);
-
-    if (is_mem_read) {
-        m_ram->read(memMess->getAddr(), const_cast<uint8_t *>(
-                    memMess->getDataBlk().getData(0,
-                        RubySystem::getBlockSizeBytes())),
-                    RubySystem::getBlockSizeBytes());
-    }  else {
-        m_ram->write(memMess->getAddr(), const_cast<uint8_t *>(
-                     memMess->getDataBlk().getData(0,
-                         RubySystem::getBlockSizeBytes())),
-                     RubySystem::getBlockSizeBytes());
-    }
-
-    MemoryNode *thisReq = new MemoryNode(arrival_time, message, addr,
+    Cycles arrival_time = curCycle();
+    physical_address_t addr = pkt->getAddr();
+    bool is_mem_read = pkt->isRead();
+
+    access(pkt);
+    MemoryNode *thisReq = new MemoryNode(arrival_time, pkt, addr,
                                          is_mem_read, !is_mem_read);
     enqueueMemRef(thisReq);
+    return true;
 }
 
 // Alternate entry point used when we already have a MemoryNode
@@ -325,51 +322,6 @@ RubyMemoryControl::enqueueMemRef(MemoryNode *memRef)
     }
 }
 
-// dequeue, peek, and isReady are used to transfer completed requests
-// back to the directory
-void
-RubyMemoryControl::dequeue()
-{
-    assert(isReady());
-    MemoryNode *req = m_response_queue.front();
-    m_response_queue.pop_front();
-    delete req;
-}
-
-const Message*
-RubyMemoryControl::peek()
-{
-    MemoryNode *node = peekNode();
-    Message* msg_ptr = node->m_msgptr.get();
-    assert(msg_ptr != NULL);
-    return msg_ptr;
-}
-
-MemoryNode *
-RubyMemoryControl::peekNode()
-{
-    assert(isReady());
-    MemoryNode *req = m_response_queue.front();
-    DPRINTF(RubyMemory, "Peek: memory request%7d: %#08x %c sched %c\n",
-            req->m_msg_counter, req->m_addr, req->m_is_mem_read ? 'R':'W',
-            m_event.scheduled() ? 'Y':'N');
-
-    return req;
-}
-
-bool
-RubyMemoryControl::isReady()
-{
-    return ((!m_response_queue.empty()) &&
-            (m_response_queue.front()->m_time <= g_system_ptr->curCycle()));
-}
-
-void
-RubyMemoryControl::setConsumer(Consumer* consumer_ptr)
-{
-    m_consumer_ptr = consumer_ptr;
-}
-
 void
 RubyMemoryControl::print(ostream& out) const
 {
@@ -380,15 +332,17 @@ void
 RubyMemoryControl::enqueueToDirectory(MemoryNode *req, Cycles latency)
 {
     Tick arrival_time = clockEdge(latency);
-    Cycles ruby_arrival_time = g_system_ptr->ticksToCycles(arrival_time);
-    req->m_time = ruby_arrival_time;
-    m_response_queue.push_back(req);
+    PacketPtr pkt = req->pkt;
+
+    // access already turned the packet into a response
+    assert(pkt->isResponse());
+
+    // queue the packet in the response queue to be sent out after
+    // the static latency has passed
+    port.schedTimingResp(pkt, arrival_time);
 
     DPRINTF(RubyMemory, "Enqueueing msg %#08x %c back to directory at %15d\n",
             req->m_addr, req->m_is_mem_read ? 'R':'W', arrival_time);
-
-    // schedule the wake up
-    m_consumer_ptr->scheduleEventAbsolute(arrival_time);
 }
 
 // getBank returns an integer that is unique for each
@@ -560,9 +514,8 @@ RubyMemoryControl::issueRequest(int bank)
             req->m_is_mem_read? 'R':'W',
             bank, m_event.scheduled() ? 'Y':'N');
 
-    if (req->m_msgptr) {  // don't enqueue L3 writebacks
-        enqueueToDirectory(req, Cycles(m_mem_ctl_latency + m_mem_fixed_delay));
-    }
+    enqueueToDirectory(req, Cycles(m_mem_ctl_latency + m_mem_fixed_delay));
+
     m_oldRequest[bank] = 0;
     markTfaw(rank);
     m_bankBusyCounter[bank] = m_bank_busy_time;
@@ -724,16 +677,16 @@ RubyMemoryControl::functionalRead(Packet *pkt)
 {
     for (std::list<MemoryNode *>::iterator it = m_input_queue.begin();
          it != m_input_queue.end(); ++it) {
-        Message* msg_ptr = (*it)->m_msgptr.get();
-        if (msg_ptr->functionalRead(pkt)) {
+        PacketPtr msg = (*it)->pkt;
+        if (pkt->checkFunctional(msg)) {
             return true;
         }
     }
 
     for (std::list<MemoryNode *>::iterator it = m_response_queue.begin();
          it != m_response_queue.end(); ++it) {
-        Message* msg_ptr = (*it)->m_msgptr.get();
-        if (msg_ptr->functionalRead(pkt)) {
+        PacketPtr msg = (*it)->pkt;
+        if (pkt->checkFunctional(msg)) {
             return true;
         }
     }
@@ -741,16 +694,14 @@ RubyMemoryControl::functionalRead(Packet *pkt)
     for (uint32_t bank = 0; bank < m_total_banks; ++bank) {
         for (std::list<MemoryNode *>::iterator it = m_bankQueues[bank].begin();
              it != m_bankQueues[bank].end(); ++it) {
-            Message* msg_ptr = (*it)->m_msgptr.get();
-            if (msg_ptr->functionalRead(pkt)) {
+            PacketPtr msg = (*it)->pkt;
+            if (pkt->checkFunctional(msg)) {
                 return true;
             }
         }
     }
 
-    m_ram->read(Address(pkt->getAddr()), pkt->getPtr<uint8_t>(true),
-                pkt->getSize());
-
+    functionalAccess(pkt);
     return true;
 }
 
@@ -769,16 +720,16 @@ RubyMemoryControl::functionalWrite(Packet *pkt)
 
     for (std::list<MemoryNode *>::iterator it = m_input_queue.begin();
          it != m_input_queue.end(); ++it) {
-        Message* msg_ptr = (*it)->m_msgptr.get();
-        if (msg_ptr->functionalWrite(pkt)) {
+        PacketPtr msg = (*it)->pkt;
+        if (pkt->checkFunctional(msg)) {
             num_functional_writes++;
         }
     }
 
     for (std::list<MemoryNode *>::iterator it = m_response_queue.begin();
          it != m_response_queue.end(); ++it) {
-        Message* msg_ptr = (*it)->m_msgptr.get();
-        if (msg_ptr->functionalWrite(pkt)) {
+        PacketPtr msg = (*it)->pkt;
+        if (pkt->checkFunctional(msg)) {
             num_functional_writes++;
         }
     }
@@ -786,17 +737,15 @@ RubyMemoryControl::functionalWrite(Packet *pkt)
     for (uint32_t bank = 0; bank < m_total_banks; ++bank) {
         for (std::list<MemoryNode *>::iterator it = m_bankQueues[bank].begin();
              it != m_bankQueues[bank].end(); ++it) {
-            Message* msg_ptr = (*it)->m_msgptr.get();
-            if (msg_ptr->functionalWrite(pkt)) {
+            PacketPtr msg = (*it)->pkt;
+            if (pkt->checkFunctional(msg)) {
                 num_functional_writes++;
             }
         }
     }
 
-    m_ram->write(Address(pkt->getAddr()), pkt->getPtr<uint8_t>(true),
-                 pkt->getSize());
+    functionalAccess(pkt);
     num_functional_writes++;
-
     return num_functional_writes;
 }
 
@@ -804,6 +753,7 @@ void
 RubyMemoryControl::regStats()
 {
     m_profiler_ptr->regStats();
+    AbstractMemory::regStats();
 }
 
 RubyMemoryControl *
@@ -811,3 +761,45 @@ RubyMemoryControlParams::create()
 {
     return new RubyMemoryControl(this);
 }
+
+RubyMemoryControl::MemoryPort::MemoryPort(const std::string& name,
+                                          RubyMemoryControl& _memory)
+    : QueuedSlavePort(name, &_memory, queue), queue(_memory, *this),
+      memory(_memory)
+{ }
+
+AddrRangeList
+RubyMemoryControl::MemoryPort::getAddrRanges() const
+{
+    AddrRangeList ranges;
+    ranges.push_back(memory.getAddrRange());
+    return ranges;
+}
+
+void
+RubyMemoryControl::MemoryPort::recvFunctional(PacketPtr pkt)
+{
+    pkt->pushLabel(memory.name());
+
+    if (!queue.checkFunctional(pkt)) {
+        // Default implementation of SimpleTimingPort::recvFunctional()
+        // calls recvAtomic() and throws away the latency; we can save a
+        // little here by just not calculating the latency.
+        memory.functionalWrite(pkt);
+    }
+
+    pkt->popLabel();
+}
+
+Tick
+RubyMemoryControl::MemoryPort::recvAtomic(PacketPtr pkt)
+{
+    panic("This controller does not support recv atomic!\n");
+}
+
+bool
+RubyMemoryControl::MemoryPort::recvTimingReq(PacketPtr pkt)
+{
+    // pass it to the memory controller
+    return memory.recvTimingReq(pkt);
+}
diff --git a/src/mem/ruby/structures/RubyMemoryControl.hh b/src/mem/ruby/structures/RubyMemoryControl.hh
index dde6143c4..6b1ec1702 100644
--- a/src/mem/ruby/structures/RubyMemoryControl.hh
+++ b/src/mem/ruby/structures/RubyMemoryControl.hh
@@ -34,12 +34,12 @@
 #include <list>
 #include <string>
 
+#include "mem/abstract_mem.hh"
 #include "mem/protocol/MemoryMsg.hh"
 #include "mem/ruby/common/Address.hh"
 #include "mem/ruby/common/Global.hh"
 #include "mem/ruby/profiler/MemCntrlProfiler.hh"
-#include "mem/ruby/structures/MemoryControl.hh"
-#include "mem/ruby/structures/MemoryVector.hh"
+#include "mem/ruby/structures/MemoryNode.hh"
 #include "mem/ruby/system/System.hh"
 #include "params/RubyMemoryControl.hh"
 
@@ -49,7 +49,7 @@
 
 //////////////////////////////////////////////////////////////////////////////
 
-class RubyMemoryControl : public MemoryControl
+class RubyMemoryControl : public AbstractMemory, public Consumer
 {
   public:
     typedef RubyMemoryControlParams Params;
@@ -59,22 +59,18 @@ class RubyMemoryControl : public MemoryControl
 
     ~RubyMemoryControl();
 
+    virtual BaseSlavePort& getSlavePort(const std::string& if_name,
+                                        PortID idx = InvalidPortID);
     unsigned int drain(DrainManager *dm);
-
     void wakeup();
 
-    void setConsumer(Consumer* consumer_ptr);
-    Consumer* getConsumer() { return m_consumer_ptr; };
     void setDescription(const std::string& name) { m_description = name; };
     std::string getDescription() { return m_description; };
 
     // Called from the directory:
-    void enqueue(const MsgPtr& message, Cycles latency);
+    bool recvTimingReq(PacketPtr pkt);
+    void recvFunctional(PacketPtr pkt);
     void enqueueMemRef(MemoryNode *memRef);
-    void dequeue();
-    const Message* peek();
-    MemoryNode *peekNode();
-    bool isReady();
     bool areNSlotsAvailable(int n) { return true; };  // infinite queue length
 
     void print(std::ostream& out) const;
@@ -108,8 +104,34 @@ class RubyMemoryControl : public MemoryControl
     RubyMemoryControl (const RubyMemoryControl& obj);
     RubyMemoryControl& operator=(const RubyMemoryControl& obj);
 
+  private:
+    // For now, make use of a queued slave port to avoid dealing with
+    // flow control for the responses being sent back
+    class MemoryPort : public QueuedSlavePort
+    {
+        SlavePacketQueue queue;
+        RubyMemoryControl& memory;
+
+      public:
+        MemoryPort(const std::string& name, RubyMemoryControl& _memory);
+
+      protected:
+        Tick recvAtomic(PacketPtr pkt);
+
+        void recvFunctional(PacketPtr pkt);
+
+        bool recvTimingReq(PacketPtr);
+
+        virtual AddrRangeList getAddrRanges() const;
+    };
+
+    /**
+     * Our incoming port, for a multi-ported controller add a crossbar
+     * in front of it
+     */
+    MemoryPort port;
+
     // data members
-    Consumer* m_consumer_ptr;  // Consumer to signal a wakeup()
     std::string m_description;
     int m_msg_counter;
 
@@ -163,8 +185,20 @@ class RubyMemoryControl : public MemoryControl
 
     MemCntrlProfiler* m_profiler_ptr;
 
-    // Actual physical memory.
-    MemoryVector* m_ram;
+    class MemCntrlEvent : public Event
+    {
+      public:
+        MemCntrlEvent(RubyMemoryControl* _mem_cntrl)
+        {
+            mem_cntrl = _mem_cntrl;
+        }
+      private:
+        void process() { mem_cntrl->wakeup(); }
+
+        RubyMemoryControl* mem_cntrl;
+    };
+
+    MemCntrlEvent m_event;
 };
 
 std::ostream& operator<<(std::ostream& out, const RubyMemoryControl& obj);
diff --git a/src/mem/ruby/structures/RubyMemoryControl.py b/src/mem/ruby/structures/RubyMemoryControl.py
index f0828fb19..78f2d8dcb 100644
--- a/src/mem/ruby/structures/RubyMemoryControl.py
+++ b/src/mem/ruby/structures/RubyMemoryControl.py
@@ -28,14 +28,12 @@
 #          Brad Beckmann
 
 from m5.params import *
-from m5.SimObject import SimObject
-from MemoryControl import MemoryControl
+from AbstractMemory import AbstractMemory
 
-class RubyMemoryControl(MemoryControl):
+class RubyMemoryControl(AbstractMemory):
     type = 'RubyMemoryControl'
     cxx_class = 'RubyMemoryControl'
     cxx_header = "mem/ruby/structures/RubyMemoryControl.hh"
-    version = Param.Int("");
 
     banks_per_rank = Param.Int(8, "");
     ranks_per_dimm = Param.Int(2, "");
@@ -53,3 +51,7 @@ class RubyMemoryControl(MemoryControl):
     tFaw = Param.Int(0, "");
     mem_random_arbitrate = Param.Int(0, "");
     mem_fixed_delay = Param.Cycles(0, "");
+
+    # single-ported on the system interface side, instantiate with a
+    # crossbar in front of the controller for multiple ports
+    port = SlavePort("Slave port")
diff --git a/src/mem/ruby/structures/SConscript b/src/mem/ruby/structures/SConscript
index dee5769d3..ed00d7382 100644
--- a/src/mem/ruby/structures/SConscript
+++ b/src/mem/ruby/structures/SConscript
@@ -35,14 +35,12 @@ if env['PROTOCOL'] == 'None':
 
 SimObject('Cache.py')
 SimObject('DirectoryMemory.py')
-SimObject('MemoryControl.py')
 SimObject('RubyMemoryControl.py')
 SimObject('RubyPrefetcher.py')
 SimObject('WireBuffer.py')
 
 Source('DirectoryMemory.cc')
 Source('CacheMemory.cc')
-Source('MemoryControl.cc')
 Source('WireBuffer.cc')
 Source('RubyMemoryControl.cc')
 Source('MemoryNode.cc')
diff --git a/src/mem/ruby/system/RubySystem.py b/src/mem/ruby/system/RubySystem.py
index 0943fb3f6..77bd9448d 100644
--- a/src/mem/ruby/system/RubySystem.py
+++ b/src/mem/ruby/system/RubySystem.py
@@ -38,8 +38,8 @@ class RubySystem(ClockedObject):
         "insert random delays on message enqueue times");
     block_size_bytes = Param.UInt32(64,
         "default cache block size; must be a power of two");
-    mem_size = Param.MemorySize("total memory size of the system");
-    no_mem_vec = Param.Bool(False, "do not allocate Ruby's mem vector");
+    memory_size_bits = Param.UInt32(64,
+        "number of bits that a memory address requires");
 
     # Profiler related configuration variables
     hot_lines = Param.Bool(False, "")
diff --git a/src/mem/ruby/system/Sequencer.py b/src/mem/ruby/system/Sequencer.py
index 6f64207dc..b54924ba7 100644
--- a/src/mem/ruby/system/Sequencer.py
+++ b/src/mem/ruby/system/Sequencer.py
@@ -55,7 +55,7 @@ class RubyPort(MemObject):
 class RubyPortProxy(RubyPort):
     type = 'RubyPortProxy'
     cxx_header = "mem/ruby/system/RubyPortProxy.hh"
-    access_phys_mem = True
+    access_phys_mem = False
     
 class RubySequencer(RubyPort):
     type = 'RubySequencer'
diff --git a/src/mem/ruby/system/System.cc b/src/mem/ruby/system/System.cc
index 8bcc87474..066cfae87 100644
--- a/src/mem/ruby/system/System.cc
+++ b/src/mem/ruby/system/System.cc
@@ -47,7 +47,6 @@ int RubySystem::m_random_seed;
 bool RubySystem::m_randomization;
 uint32_t RubySystem::m_block_size_bytes;
 uint32_t RubySystem::m_block_size_bits;
-uint64_t RubySystem::m_memory_size_bytes;
 uint32_t RubySystem::m_memory_size_bits;
 
 RubySystem::RubySystem(const Params *p)
@@ -63,20 +62,7 @@ RubySystem::RubySystem(const Params *p)
     m_block_size_bytes = p->block_size_bytes;
     assert(isPowerOf2(m_block_size_bytes));
     m_block_size_bits = floorLog2(m_block_size_bytes);
-
-    m_memory_size_bytes = p->mem_size;
-    if (m_memory_size_bytes == 0) {
-        m_memory_size_bits = 0;
-    } else {
-        m_memory_size_bits = ceilLog2(m_memory_size_bytes);
-    }
-
-    if (p->no_mem_vec) {
-        m_mem_vec = NULL;
-    } else {
-        m_mem_vec = new MemoryVector;
-        m_mem_vec->resize(m_memory_size_bytes);
-    }
+    m_memory_size_bits = p->memory_size_bits;
 
     m_warmup_enabled = false;
     m_cooldown_enabled = false;
@@ -108,17 +94,10 @@ RubySystem::registerAbstractController(AbstractController* cntrl)
   g_abs_controls[id.getType()][id.getNum()] = cntrl;
 }
 
-void
-RubySystem::registerMemController(MemoryControl *mc) {
-    m_memory_controller_vec.push_back(mc);
-}
-
 RubySystem::~RubySystem()
 {
     delete m_network;
     delete m_profiler;
-    if (m_mem_vec)
-        delete m_mem_vec;
 }
 
 void
@@ -206,19 +185,8 @@ RubySystem::serialize(std::ostream &os)
     // Restore curTick
     setCurTick(curtick_original);
 
-    uint8_t *raw_data = NULL;
-    uint64 memory_trace_size = m_mem_vec->collatePages(raw_data);
-
-    string memory_trace_file = name() + ".memory.gz";
-    writeCompressedTrace(raw_data, memory_trace_file,
-                         memory_trace_size);
-
-    SERIALIZE_SCALAR(memory_trace_file);
-    SERIALIZE_SCALAR(memory_trace_size);
-
-
     // Aggergate the trace entries together into a single array
-    raw_data = new uint8_t[4096];
+    uint8_t *raw_data = new uint8_t[4096];
     uint64 cache_trace_size = m_cache_recorder->aggregateRecords(&raw_data,
                                                                  4096);
     string cache_trace_file = name() + ".cache.gz";
@@ -272,22 +240,6 @@ RubySystem::unserialize(Checkpoint *cp, const string &section)
     uint64 block_size_bytes = getBlockSizeBytes();
     UNSERIALIZE_OPT_SCALAR(block_size_bytes);
 
-    if (m_mem_vec != NULL) {
-        string memory_trace_file;
-        uint64 memory_trace_size = 0;
-
-        UNSERIALIZE_SCALAR(memory_trace_file);
-        UNSERIALIZE_SCALAR(memory_trace_size);
-        memory_trace_file = cp->cptDir + "/" + memory_trace_file;
-
-        readCompressedTrace(memory_trace_file, uncompressed_trace,
-                            memory_trace_size);
-        m_mem_vec->populatePages(uncompressed_trace);
-
-        delete [] uncompressed_trace;
-        uncompressed_trace = NULL;
-    }
-
     string cache_trace_file;
     uint64 cache_trace_size = 0;
 
@@ -355,12 +307,6 @@ RubySystem::startup()
         m_cache_recorder = NULL;
         m_warmup_enabled = false;
 
-        // reset DRAM so that it's not waiting for events on the old event
-        // queue
-        for (int i = 0; i < m_memory_controller_vec.size(); ++i) {
-            m_memory_controller_vec[i]->reset();
-        }
-
         // Restore eventq head
         eventq_head = eventq->replaceHead(eventq_head);
         // Restore curTick and Ruby System's clock
diff --git a/src/mem/ruby/system/System.hh b/src/mem/ruby/system/System.hh
index 8193764dc..81c6029c6 100644
--- a/src/mem/ruby/system/System.hh
+++ b/src/mem/ruby/system/System.hh
@@ -39,8 +39,6 @@
 #include "base/output.hh"
 #include "mem/ruby/profiler/Profiler.hh"
 #include "mem/ruby/slicc_interface/AbstractController.hh"
-#include "mem/ruby/structures/MemoryControl.hh"
-#include "mem/ruby/structures/MemoryVector.hh"
 #include "mem/ruby/system/CacheRecorder.hh"
 #include "mem/packet.hh"
 #include "params/RubySystem.hh"
@@ -75,7 +73,6 @@ class RubySystem : public ClockedObject
     static int getRandomization() { return m_randomization; }
     static uint32_t getBlockSizeBytes() { return m_block_size_bytes; }
     static uint32_t getBlockSizeBits() { return m_block_size_bits; }
-    static uint64_t getMemorySizeBytes() { return m_memory_size_bytes; }
     static uint32_t getMemorySizeBits() { return m_memory_size_bits; }
 
     // Public Methods
@@ -86,13 +83,6 @@ class RubySystem : public ClockedObject
         return m_profiler;
     }
 
-    MemoryVector*
-    getMemoryVector()
-    {
-        assert(m_mem_vec != NULL);
-        return m_mem_vec;
-    }
-
     void regStats() { m_profiler->regStats(name()); }
     void collateStats() { m_profiler->collateStats(); }
     void resetStats();
@@ -106,7 +96,6 @@ class RubySystem : public ClockedObject
 
     void registerNetwork(Network*);
     void registerAbstractController(AbstractController*);
-    void registerMemController(MemoryControl *mc);
 
     bool eventQueueEmpty() { return eventq->empty(); }
     void enqueueRubyEvent(Tick tick)
@@ -132,16 +121,13 @@ class RubySystem : public ClockedObject
     static bool m_randomization;
     static uint32_t m_block_size_bytes;
     static uint32_t m_block_size_bits;
-    static uint64_t m_memory_size_bytes;
     static uint32_t m_memory_size_bits;
 
     Network* m_network;
-    std::vector<MemoryControl *> m_memory_controller_vec;
     std::vector<AbstractController *> m_abs_cntrl_vec;
 
   public:
     Profiler* m_profiler;
-    MemoryVector* m_mem_vec;
     bool m_warmup_enabled;
     bool m_cooldown_enabled;
     CacheRecorder* m_cache_recorder;
diff --git a/src/mem/slicc/symbols/StateMachine.py b/src/mem/slicc/symbols/StateMachine.py
index 009680941..8b7a63f6a 100644
--- a/src/mem/slicc/symbols/StateMachine.py
+++ b/src/mem/slicc/symbols/StateMachine.py
@@ -285,7 +285,7 @@ class $c_ident : public AbstractController
     void recordCacheTrace(int cntrl, CacheRecorder* tr);
     Sequencer* getSequencer() const;
 
-    uint32_t functionalWriteBuffers(PacketPtr&);
+    int functionalWriteBuffers(PacketPtr&);
 
     void countTransition(${ident}_State state, ${ident}_Event event);
     void possibleTransition(${ident}_State state, ${ident}_Event event);
@@ -989,10 +989,10 @@ $c_ident::${{action.ident}}(const Address& addr)
 
         # Function for functional writes to messages buffered in the controller
         code('''
-uint32_t
+int
 $c_ident::functionalWriteBuffers(PacketPtr& pkt)
 {
-    uint32_t num_functional_writes = 0;
+    int num_functional_writes = 0;
 ''')
         for var in self.objects:
             vtype = var.type