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diff --git a/src/mem/physical.hh b/src/mem/physical.hh
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+/*
+ * Copyright (c) 2001-2005 The Regents of The University of Michigan
+ * 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.
+ */
+
+/* @file
+ */
+
+#ifndef __PHYSICAL_MEMORY_HH__
+#define __PHYSICAL_MEMORY_HH__
+
+#include "base/range.hh"
+#include "mem/mem_object.hh"
+#include "mem/packet.hh"
+#include "mem/port.hh"
+#include "sim/eventq.hh"
+#include <map>
+#include <string>
+
+//
+// Functional model for a contiguous block of physical memory. (i.e. RAM)
+//
+class PhysicalMemory : public MemObject
+{
+    class MemoryPort : public Port
+    {
+        PhysicalMemory *memory;
+
+      public:
+
+        MemoryPort(PhysicalMemory *_memory);
+
+      protected:
+
+        virtual bool recvTiming(Packet *pkt);
+
+        virtual Tick recvAtomic(Packet *pkt);
+
+        virtual void recvFunctional(Packet *pkt);
+
+        virtual void recvStatusChange(Status status);
+
+        virtual void getDeviceAddressRanges(AddrRangeList &resp,
+                                            AddrRangeList &snoop);
+
+        virtual int deviceBlockSize();
+    };
+
+    int numPorts;
+
+
+    struct MemResponseEvent : public Event
+    {
+        Packet *pkt;
+        MemoryPort *memoryPort;
+
+        MemResponseEvent(Packet *pkt, MemoryPort *memoryPort);
+        void process();
+        const char *description();
+    };
+
+  private:
+    // prevent copying of a MainMemory object
+    PhysicalMemory(const PhysicalMemory &specmem);
+    const PhysicalMemory &operator=(const PhysicalMemory &specmem);
+
+  protected:
+    Addr base_addr;
+    Addr pmem_size;
+    uint8_t *pmem_addr;
+    MemoryPort *port;
+    int page_ptr;
+    Tick lat;
+
+  public:
+    Addr new_page();
+    uint64_t size() { return pmem_size; }
+
+  public:
+    PhysicalMemory(const std::string &n, Tick latency);
+    virtual ~PhysicalMemory();
+
+  public:
+    int deviceBlockSize();
+    void getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop);
+    virtual Port *getPort(const std::string &if_name);
+    void virtual init();
+
+    // fast back-door memory access for vtophys(), remote gdb, etc.
+    // uint64_t phys_read_qword(Addr addr) const;
+  private:
+    bool doTimingAccess(Packet *pkt, MemoryPort *memoryPort);
+    Tick doAtomicAccess(Packet *pkt);
+    void doFunctionalAccess(Packet *pkt);
+
+    void recvStatusChange(Port::Status status);
+
+  public:
+    virtual void serialize(std::ostream &os);
+    virtual void unserialize(Checkpoint *cp, const std::string &section);
+
+};
+
+#endif //__PHYSICAL_MEMORY_HH__