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, 50 insertions, 0 deletions

diff --git a/ext/dsent/model/timing_graph/ElectricalNet.h b/ext/dsent/model/timing_graph/ElectricalNet.h
new file mode 100644
index 000000000..b96bfea91
--- /dev/null
+++ b/ext/dsent/model/timing_graph/ElectricalNet.h
@@ -0,0 +1,50 @@
+#ifndef __DSENT_MODEL_ELECTRICAL_NET_H__
+#define __DSENT_MODEL_ELECTRICAL_NET_H__
+
+#include "util/CommonType.h"
+#include "model/timing_graph/ElectricalTimingNode.h"
+
+namespace DSENT
+{
+    class ElectricalLoad;
+
+    class ElectricalNet : public ElectricalTimingNode
+    {
+        public:
+            ElectricalNet(const String& instance_name_, ElectricalModel* model_);
+            virtual ~ElectricalNet();
+
+        public:
+            // Set distributed res/cap
+            void setDistributedRes(double distributed_res_);
+            void setDistributedCap(double distributed_cap_);
+            // Get distributed res/cap
+            double getDistributedRes() const;
+            double getDistributedCap() const;
+            // Calculate wiring delay (or net 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;
+
+            virtual bool isNet() const;
+            
+        private:
+            // Disable copy constructor
+            ElectricalNet(const ElectricalNet& net_);
+
+        private:
+            // Name of this instance
+            String m_instance_name_;
+            // Distributed capacitance and resistance of the net
+            double m_distributed_res_;            
+            double m_distributed_cap_;
+    };
+    
+} // namespace DSENT
+
+#endif // __DSENT_MODEL_ELECTRICAL_NET_H__
+