From e8ed7b1d1b5bef31e9874f679a5797c2e00d06f1 Mon Sep 17 00:00:00 2001 From: Nilay Vaish Date: Sat, 11 Oct 2014 15:02:23 -0500 Subject: 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. --- ext/dsent/model/std_cells/INV.cc | 219 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 219 insertions(+) create mode 100644 ext/dsent/model/std_cells/INV.cc (limited to 'ext/dsent/model/std_cells/INV.cc') diff --git a/ext/dsent/model/std_cells/INV.cc b/ext/dsent/model/std_cells/INV.cc new file mode 100644 index 000000000..a6ea6c4f4 --- /dev/null +++ b/ext/dsent/model/std_cells/INV.cc @@ -0,0 +1,219 @@ +#include "model/std_cells/INV.h" + +#include + +#include "model/PortInfo.h" +#include "model/TransitionInfo.h" +#include "model/EventInfo.h" +#include "model/std_cells/CellMacros.h" +#include "model/std_cells/StdCellLib.h" +#include "model/timing_graph/ElectricalNet.h" +#include "model/timing_graph/ElectricalDriver.h" +#include "model/timing_graph/ElectricalLoad.h" +#include "model/timing_graph/ElectricalDelay.h" + +namespace DSENT +{ + using std::ceil; + using std::max; + + INV::INV(const String& instance_name_, const TechModel* tech_model_) + : StdCell(instance_name_, tech_model_) + { + initProperties(); + } + + INV::~INV() + {} + + void INV::initProperties() + { + return; + } + + void INV::constructModel() + { + // All constructModel should do is create Area/NDDPower/Energy Results as + // well as instantiate any sub-instances using only the hard parameters + + // Build Electrical Connectivity + createInputPort("A"); + createOutputPort("Y"); + + createLoad("A_Cap"); + createDelay("A_to_Y_delay"); + createDriver("Y_Ron", true); + + ElectricalLoad* a_cap = getLoad("A_Cap"); + ElectricalDelay* a_to_y_delay = getDelay("A_to_Y_delay"); + ElectricalDriver* y_ron = getDriver("Y_Ron"); + + getNet("A")->addDownstreamNode(a_cap); + a_cap->addDownstreamNode(a_to_y_delay); + a_to_y_delay->addDownstreamNode(y_ron); + y_ron->addDownstreamNode(getNet("Y")); + + // Create Area result + // Create NDD Power result + createElectricalAtomicResults(); + // Create INV Event Energy Result + createElectricalEventAtomicResult("INV"); + + getEventInfo("Idle")->setStaticTransitionInfos(); + + return; + } + + void INV::updateModel() + { + // All updateModel should do is calculate numbers for the Area/NDDPower/Energy + // Results as anything else that needs to be done using either soft or hard parameters + + // Get parameters + double drive_strength = getDrivingStrength(); + Map* cache = getTechModel()->getStdCellLib()->getStdCellCache(); + + // Standard cell cache string + String cell_name = "INV_X" + (String) drive_strength; + + // Get timing parameters + getLoad("A_Cap")->setLoadCap(cache->get(cell_name + "->Cap->A")); + getDriver("Y_Ron")->setOutputRes(cache->get(cell_name + "->DriveRes->Y")); + getDelay("A_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->A_to_Y")); + + // Set the cell area + getAreaResult("Active")->setValue(cache->get(cell_name + "->Area->Active")); + getAreaResult("Metal1Wire")->setValue(cache->get(cell_name + "->Area->Metal1Wire")); + + return; + } + + void INV::evaluateModel() + { + return; + } + + void INV::useModel() + { + // Get parameters + double drive_strength = getDrivingStrength(); + Map* cache = getTechModel()->getStdCellLib()->getStdCellCache(); + + // Standard cell cache string + String cell_name = "INV_X" + (String) drive_strength; + + // Propagate the transition info and get the 0->1 transtion count + propagateTransitionInfo(); + double P_A = getInputPort("A")->getTransitionInfo().getProbability1(); + double Y_num_trans_01 = getOutputPort("Y")->getTransitionInfo().getNumberTransitions01(); + + // Calculate leakage + double leakage = 0; + leakage += cache->get(cell_name + "->Leakage->!A") * (1 - P_A); + leakage += cache->get(cell_name + "->Leakage->A") * P_A; + getNddPowerResult("Leakage")->setValue(leakage); + + // Get VDD + double vdd = getTechModel()->get("Vdd"); + + // Get capacitances + //double a_cap = cache->get(cell_name + "->Cap->A"); + double y_cap = cache->get(cell_name + "->Cap->Y"); + double y_load_cap = getNet("Y")->getTotalDownstreamCap(); + + // Calculate INV Event energy + double energy_per_trans_01 = (y_cap + y_load_cap) * vdd * vdd; + getEventResult("INV")->setValue(energy_per_trans_01 * Y_num_trans_01); + return; + } + + void INV::propagateTransitionInfo() + { + // Get input transition info + const TransitionInfo& trans_A = getInputPort("A")->getTransitionInfo(); + + // Set output transition info + double Y_num_trans_00 = trans_A.getNumberTransitions11(); + double Y_num_trans_01 = trans_A.getNumberTransitions01(); + double Y_num_trans_11 = trans_A.getNumberTransitions00(); + + TransitionInfo trans_Y(Y_num_trans_00, Y_num_trans_01, Y_num_trans_11); + getOutputPort("Y")->setTransitionInfo(trans_Y); + return; + } + + // Creates the standard cell, characterizes and abstracts away the details + void INV::cacheStdCell(StdCellLib* cell_lib_, double drive_strength_) + { + // Standard cell cache string + String cell_name = "INV_X" + (String) drive_strength_; + + Log::printLine("=== " + cell_name + " ==="); + + // Get parameters + double gate_pitch = cell_lib_->getTechModel()->get("Gate->PitchContacted"); + Map* cache = cell_lib_->getStdCellCache(); + + // Now actually build the full standard cell model + // Create the two input ports + createInputPort("A"); + createOutputPort("Y"); + + // Adds macros + CellMacros::addInverter(this, "INV", true, true, "A", "Y"); + CellMacros::updateInverter(this, "INV", drive_strength_); + + // Cache area result + double area = gate_pitch * getTotalHeight() * (1 + getGenProperties()->get("INV_GatePitches").toDouble()); + cache->set(cell_name + "->Area->Active", area); + cache->set(cell_name + "->Area->Metal1Wire", area); + Log::printLine(cell_name + "->Area->Active=" + (String) area); + Log::printLine(cell_name + "->Area->Metal1Wire=" + (String) area); + + // -------------------------------------------------------------------- + // Leakage Model Calculation + // -------------------------------------------------------------------- + double leakage_a0 = getGenProperties()->get("INV_LeakagePower_0").toDouble(); + double leakage_a1 = getGenProperties()->get("INV_LeakagePower_1").toDouble(); + cache->set(cell_name + "->Leakage->!A", leakage_a0); + cache->set(cell_name + "->Leakage->A", leakage_a1); + Log::printLine(cell_name + "->Leakage->!A=" + (String) leakage_a0); + Log::printLine(cell_name + "->Leakage->A=" + (String) leakage_a1); + // -------------------------------------------------------------------- + + /* + // Cache event energy results + double event_a_flip = getGenProperties()->get("INV_A_Flip").toDouble() + getGenProperties()->get("INV_ZN_Flip").toDouble(); + cache->set(cell_name + "->Event_A_Flip", event_a_flip); + Log::printLine(cell_name + "->Event_A_Flip=" + (String) event_a_flip); + */ + + // -------------------------------------------------------------------- + // Get Node Capacitances + // -------------------------------------------------------------------- + double a_cap = getNet("A")->getTotalDownstreamCap(); + double y_cap = getNet("Y")->getTotalDownstreamCap(); + + cache->set(cell_name + "->Cap->A", a_cap); + cache->set(cell_name + "->Cap->Y", y_cap); + Log::printLine(cell_name + "->Cap->A=" + (String) a_cap); + Log::printLine(cell_name + "->Cap->Y=" + (String) y_cap); + // -------------------------------------------------------------------- + + // -------------------------------------------------------------------- + // Build Internal Delay Model + // -------------------------------------------------------------------- + double y_ron = getDriver("INV_RonZN")->getOutputRes(); + double a_to_y_delay = getDriver("INV_RonZN")->calculateDelay(); + cache->set(cell_name + "->DriveRes->Y", y_ron); + cache->set(cell_name + "->Delay->A_to_Y", a_to_y_delay); + Log::printLine(cell_name + "->DriveRes->Y=" + (String) y_ron); + Log::printLine(cell_name + "->Delay->A_to_Y=" + (String) a_to_y_delay); + // -------------------------------------------------------------------- + + return; + + } + +} // namespace DSENT + -- cgit v1.2.3