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/ElectricalDelay.h b/ext/dsent/model/timing_graph/ElectricalDelay.h
new file mode 100644
index 000000000..d3d3d3a8c
--- /dev/null
+++ b/ext/dsent/model/timing_graph/ElectricalDelay.h
@@ -0,0 +1,43 @@
+#ifndef __DSENT_MODEL_ELECTRICAL_DELAY_H__
+#define __DSENT_MODEL_ELECTRICAL_DELAY_H__
+
+#include "util/CommonType.h"
+#include "model/timing_graph/ElectricalTimingNode.h"
+
+namespace DSENT
+{
+    class ElectricalLoad;
+
+    class ElectricalDelay : public ElectricalTimingNode
+    {
+        public:
+            ElectricalDelay(const String& instance_name_, ElectricalModel* model_);
+            virtual ~ElectricalDelay();
+
+        public:
+            // Specify an ideal delay
+            void setDelay(double delay_);
+            // Get the ideal delay
+            double getDelay() const;
+            // Calculate delay
+            double calculateDelay() const;
+            // Calculate transition
+            double calculateTransition() const;
+            // get maximum of upstream drive resistance
+            double getMaxUpstreamRes() const;
+            // get total amount of downstream load capacitance 
+            double getTotalDownstreamCap() const;
+            
+        private:
+            // Disable copy constructor
+            ElectricalDelay(const ElectricalDelay& net_);
+
+        private:
+            // The amount of ideal delay
+            double m_delay_;
+    };
+    
+} // namespace DSENT
+
+#endif // __DSENT_MODEL_ELECTRICAL_DELAY_H__
+