ext: add the source code for DSENT

This patch adds a tool called DSENT to the ext/ directory.  DSENT
is a tool that models power and area for on-chip networks.  The next
patch adds a script for using the tool.

1 files changed, 25 insertions, 0 deletions

diff --git a/ext/dsent/model/optical_graph/OpticalReceiver.h b/ext/dsent/model/optical_graph/OpticalReceiver.h
new file mode 100644
index 000000000..11c940522
--- /dev/null
+++ b/ext/dsent/model/optical_graph/OpticalReceiver.h
@@ -0,0 +1,25 @@
+#ifndef __DSENT_MODEL_OPTICALGRAPH_OPTICALRECEIVER_H__
+#define __DSENT_MODEL_OPTICALGRAPH_OPTICALRECEIVER_H__
+
+#include "model/OpticalModel.h"
+#include "util/CommonType.h"
+
+namespace DSENT
+{
+    // The job of an optical receiver interface is to provide a function to
+    // return a sensitivity (in Amps)
+    class OpticalReceiver
+    {
+        public:
+            OpticalReceiver(){};
+            virtual ~OpticalReceiver(){};
+
+        public:
+            // Returns the sensitivity of the receiver given an extinction ratio
+            virtual double getSensitivity(double ER_dB_) const = 0;
+    };
+    
+} // namespace DSENT
+
+#endif // __DSENT_MODEL_OPTICALGRAPH_OPTICALRECEIVER_H__
+