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diff --git a/src/dev/intpin.hh b/src/dev/intpin.hh
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+/*
+ * Copyright 2019 Google, Inc.
+ *
+ * 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: Gabe Black
+ */
+
+#ifndef __DEV_INTPIN_HH__
+#define __DEV_INTPIN_HH__
+
+#include "sim/port.hh"
+
+class IntSourcePinBase;
+
+class IntSinkPinBase : public Port
+{
+  protected:
+    friend IntSourcePinBase;
+
+    IntSourcePinBase *source = nullptr;
+
+    int _number = 0;
+    bool _state = false;
+
+    IntSinkPinBase(const std::string &_name, PortID _id, int num) :
+        Port(_name, _id), _number(num)
+    {}
+
+    virtual void raiseOnDevice() = 0;
+    virtual void lowerOnDevice() = 0;
+
+    void
+    raise()
+    {
+        _state = true;
+        raiseOnDevice();
+    }
+
+    void
+    lower()
+    {
+        _state = false;
+        lowerOnDevice();
+    }
+
+  public:
+    int number() { return _number; }
+    bool state() { return _state; }
+
+    void bind(Port &peer) override;
+    void unbind() override;
+};
+
+template <class Device>
+class IntSinkPin : public IntSinkPinBase
+{
+  private:
+    Device *device = nullptr;
+
+    void raiseOnDevice() override { device->raiseInterruptPin(number()); }
+    void lowerOnDevice() override { device->lowerInterruptPin(number()); }
+
+  public:
+    IntSinkPin(const std::string &_name, PortID _id, Device *dev, int num) :
+        IntSinkPinBase(_name, _id, num), device(dev) {}
+    IntSinkPin(const std::string &_name, PortID _id, Device *dev) :
+        IntSinkPin(_name, _id, dev, _id) {}
+};
+
+class IntSourcePinBase : public Port
+{
+  private:
+    IntSinkPinBase *sink = nullptr;
+    bool _state = false;
+
+  public:
+    IntSourcePinBase(const std::string &_name, PortID _id, bool def_state) :
+        Port(_name, _id), _state(def_state)
+    {}
+
+    void raise() { sink->raise(); }
+    void lower() { sink->lower(); }
+
+    void bind(Port &peer) override;
+    void unbind() override;
+};
+
+template <class Device>
+class IntSourcePin : public IntSourcePinBase
+{
+  public:
+    IntSourcePin(const std::string &_name, PortID _id, Device *owner,
+                 bool def_state=false) :
+        IntSourcePinBase(_name, _id, def_state)
+    {}
+};
+
+#endif //__DEV_INTPIN_HH__