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, 43 insertions, 0 deletions

diff --git a/ext/dsent/model/timing_graph/ElectricalLoad.h b/ext/dsent/model/timing_graph/ElectricalLoad.h
new file mode 100644
index 000000000..551eccf85
--- /dev/null
+++ b/ext/dsent/model/timing_graph/ElectricalLoad.h
@@ -0,0 +1,43 @@
+#ifndef __DSENT_MODEL_ELECTRICAL_LOAD_H__
+#define __DSENT_MODEL_ELECTRICAL_LOAD_H__
+
+#include "util/CommonType.h"
+#include "model/timing_graph/ElectricalTimingNode.h"
+
+namespace DSENT
+{
+    class ElectricalModel;
+    class ElectricalDriver;
+    
+    class ElectricalLoad : public ElectricalTimingNode
+    {
+        public:
+            ElectricalLoad(const String& instance_name_, ElectricalModel* model_);
+            virtual ~ElectricalLoad();
+
+        public:
+            // Set the input capacitance of this input port
+            void setLoadCap(double load_cap_);
+            // Get the load capacitance
+            double getLoadCap() const;
+            // Get total load capacitance
+            double getTotalDownstreamCap() const;
+            // Calculate delay due to total load capacitance
+            double calculateDelay() const;
+            // Calculate transition
+            double calculateTransition() const;
+
+            bool isLoad() const;
+            
+        private:
+            // Disable copy constructor
+            ElectricalLoad(const ElectricalLoad& load_);
+
+        private:
+            // Load capacitance
+            double m_load_cap_;
+    };
+} // namespace DSENT
+
+#endif // __DSENT_MODEL_ELECTRICAL_LOAD_H__
+