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, 28 insertions, 0 deletions

diff --git a/ext/dsent/model/optical_graph/OpticalTransmitter.h b/ext/dsent/model/optical_graph/OpticalTransmitter.h
new file mode 100644
index 000000000..235d88880
--- /dev/null
+++ b/ext/dsent/model/optical_graph/OpticalTransmitter.h
@@ -0,0 +1,28 @@
+#ifndef __DSENT_MODEL_OPTICALGRAPH_OPTICALTRANSMITTER_H__
+#define __DSENT_MODEL_OPTICALGRAPH_OPTICALTRANSMITTER_H__
+
+#include "model/OpticalModel.h"
+#include "util/CommonType.h"
+
+namespace DSENT
+{
+    // The job of a optical sender interface is to provide a function to
+    // allow the insertion loss and extinction ratio to be changed
+    class OpticalTransmitter
+    {
+        public:
+            OpticalTransmitter(){};
+            virtual ~OpticalTransmitter(){};
+
+        public:
+            // Set the transmitter specifications, returns whether it is possible
+            // to build a modulator that met those specs
+            virtual bool setTransmitterSpec(double IL_dB_, double ER_dB_) = 0;
+            // Returns power of the transmitter at a given utilization
+            virtual double getPower(double util_) const = 0;
+    }; // class OpticalTransmitter
+    
+} // namespace DSENT
+
+#endif // __DSENT_MODEL_OPTICALGRAPH_OPTICALTRANSMITTER_H__
+