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, 49 insertions, 0 deletions

diff --git a/ext/dsent/model/timing_graph/ElectricalLoad.cc b/ext/dsent/model/timing_graph/ElectricalLoad.cc
new file mode 100644
index 000000000..a20d6459d
--- /dev/null
+++ b/ext/dsent/model/timing_graph/ElectricalLoad.cc
@@ -0,0 +1,49 @@
+
+#include "model/timing_graph/ElectricalLoad.h"
+#include "model/ElectricalModel.h"
+#include "model/timing_graph/ElectricalDriver.h"
+
+namespace DSENT
+{
+    ElectricalLoad::ElectricalLoad(const String& instance_name_, ElectricalModel* model_)
+        : ElectricalTimingNode(instance_name_, model_), m_load_cap_(0.0)
+    {
+    }
+
+    ElectricalLoad::~ElectricalLoad()
+    {
+    }
+
+    void ElectricalLoad::setLoadCap(double load_cap_)
+    {
+        m_load_cap_ = load_cap_;
+        return;
+    }
+    
+    double ElectricalLoad::getLoadCap() const
+    {
+        return m_load_cap_;
+    }
+    
+    bool ElectricalLoad::isLoad() const
+    {
+        return true;
+    }    
+    
+    double ElectricalLoad::calculateDelay() const
+    {
+        return 0;
+    }
+
+    double ElectricalLoad::calculateTransition() const
+    {
+        return 1.386 * getMaxUpstreamRes() * getTotalDownstreamCap();
+    }
+
+    double ElectricalLoad::getTotalDownstreamCap() const
+    {
+        return m_load_cap_;
+    }
+
+} // namespace DSENT
+