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, 38 insertions, 0 deletions

diff --git a/ext/dsent/model/electrical/MultiplexerCrossbar.h b/ext/dsent/model/electrical/MultiplexerCrossbar.h
new file mode 100644
index 000000000..e7f092061
--- /dev/null
+++ b/ext/dsent/model/electrical/MultiplexerCrossbar.h
@@ -0,0 +1,38 @@
+#ifndef __DSENT_MODEL_ELECTRICAL_MULTIPLEXER_CROSSBAR_H__
+#define __DSENT_MODEL_ELECTRICAL_MULTIPLEXER_CROSSBAR_H__
+
+#include "util/CommonType.h"
+#include "model/ElectricalModel.h"
+
+namespace DSENT
+{
+    // A model for a NxM W-bit multiplexer-based crossbar
+    class MultiplexerCrossbar : public ElectricalModel
+    {
+        public:
+            MultiplexerCrossbar(const String& instance_name_, const TechModel* tech_model_);
+            virtual ~MultiplexerCrossbar();
+
+        public:
+            // Set a list of paramerters' name needed to construct model 
+            void initParameters();
+            // Set a list of peroperties' name needed to construct model
+            void initProperties();
+
+            // Clone and return a new instance
+            virtual MultiplexerCrossbar* clone() const;
+
+        protected:
+            // Build the model
+            virtual void constructModel();
+            virtual void updateModel();
+            virtual void propagateTransitionInfo();
+
+        private:
+            // Disable copy constructor
+            MultiplexerCrossbar(const MultiplexerCrossbar& crossbar_);
+    }; // class MultiplexerCrossbar
+} // namespace DSENT
+
+#endif // __DSENT_MODEL_ELECTRICAL_MULTIPLEXER_CROSSBAR_H__
+