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Asic Synthesis and Backend Getting to Work with OpenPiton Princeton University http://openpiton.org OpenPit ASIC SYNTHESIS AND BACKEND 2 Whats in the Box? • Synthesis – Synopsys Design Compiler • Static timing analysis (STA) – Synopsys Primetime • Formal equivalence checking (RVS) – Synopsys Formality • Place and route (PAR) – Synopsys IC Compiler • Layout versus schematic (LVS) – Mentor Graphics Calibre • Design rule checking (DRC) – Mentor Graphics Calibre • Coming soon: Gate-level simulation 3 Why is it Useful? • Research studies – Architecture, EDA, and other HW research • ASIC tapeout • Education 4 Piton ASIC • 25 tiles • Tested working in • IBM 32nm SOI silicon! • 36 mm2 (6mm x 6mm) • 1 GHz Target Frequency 5 Synthesis and Backend Flow 6 What do you need? • OpenPiton • Synopsys License – Tools and Reference Methodology (RM) • Mentor Graphics License – Calibre (for LVS and DRC only) • Standard cell library and process development kit 7 Getting Started • Download Synopsys-RM • Patch Synopsys-RM • Familiarize with directory structure and scripts • Port to process technology • Running the flow 8 Download Synopsys-RM • Synopsys Solvnet • See OpenPiton Synthesis and Backend Manual – Specify version – Specify settings • Broader support 9 Patching Synopsys-RM 10 Patching Synopsys-RM 10 Patching Synopsys-RM 10 Patching Synopsys-RM 10 Patching Synopsys-RM 11 Patching Synopsys-RM 11 Patching Synopsys-RM 11 Patching Synopsys-RM 11 Directory Structure and Scripts • All scripts written in Tcl • Two primary locations – Module generic scripts – Module specific scripts 12 Directory Structure and Scripts • All scripts written in Tcl • Two primary locations – Module generic scripts – Module specific scripts 12 Directory Structure and Scripts • All scripts written in Tcl • Two primary locations – Module generic scripts – Module specific scripts 12 Directory Structure and Scripts • All scripts written in Tcl • Two primary locations – Module generic scripts – Module specific scripts 12 Directory Structure and Scripts • All scripts written in Tcl • Two primary locations – Module generic scripts – Module specific scripts 12 Directory Structure and Scripts • All scripts written in Tcl • Two primary locations – Module generic scripts – Module specific scripts 12 Porting to a Process Technology • ${PITON_ROOT}/piton/tools/synopsys/script/common/env_setup.tcl • ${PITON_ROOT}/piton/tools/synopsys/script/common/process_setup.tcl • ${PITON_ROOT}/piton/tools/calibre/script/common/calibre_ env 13 Porting to a Process Technology • ${PITON_ROOT}/piton/tools/synopsys/script/common/env_setup.tcl • ${PITON_ROOT}/piton/tools/synopsys/script/common/process_setup.tcl • ${PITON_ROOT}/piton/tools/calibre/script/common/calibre_ env 13 Porting to a Process Technology • ${PITON_ROOT}/piton/tools/synopsys/script/common/env_setup.tcl • ${PITON_ROOT}/piton/tools/synopsys/script/common/process_setup.tcl • ${PITON_ROOT}/piton/tools/calibre/script/common/calibre_ env 13 Porting to a Process Technology • ${PITON_ROOT}/piton/tools/synopsys/script/common/env_setup.tcl • ${PITON_ROOT}/piton/tools/synopsys/script/common/process_setup.tcl • ${PITON_ROOT}/piton/tools/calibre/script/common/calibre_ env 13 Porting to a Process Technology • ${PITON_ROOT}/piton/tools/synopsys/script/common/env_setup.tcl • ${PITON_ROOT}/piton/tools/synopsys/script/common/process_setup.tcl • ${PITON_ROOT}/piton/tools/calibre/script/common/calibre_ env 13 Porting to a Process Technology • ${PITON_ROOT}/piton/tools/synopsys/script/common/env_setup.tcl • ${PITON_ROOT}/piton/tools/synopsys/script/common/process_setup.tcl • ${PITON_ROOT}/piton/tools/calibre/script/common/calibre_ env 13 Porting to a Process Technology • ${PITON_ROOT}/piton/tools/synopsys/script/common/env_setup.tcl • ${PITON_ROOT}/piton/tools/synopsys/script/common/process_setup.tcl • ${PITON_ROOT}/piton/tools/calibre/script/common/calibre_ env 13 Porting to a Process Technology • ${PITON_ROOT}/piton/tools/synopsys/script/common/env_setup.tcl • ${PITON_ROOT}/piton/tools/synopsys/script/common/process_setup.tcl • ${PITON_ROOT}/piton/tools/calibre/script/common/calibre_ env 13 Porting to a Process Technology 14 Porting to a Process Technology 14 Porting to a Process Technology 14 Porting to a Process Technology • Module specific scripts suggested for review: – module_setup.tcl – floorplan.tcl – <design_name>.constraints.tcl 15 Running the Flow • ${PITON_ROOT}/piton/tools/synopsys/block.list 16 Running the Flow • ${PITON_ROOT}/piton/tools/synopsys/block.list 16 Launch Flow 17 Launch Flow 17 Launch Flow 17 Launch Flow 17 Launch Flow 17 Launch Flow 17 Flow Runtimes 18 Flow Reports 19 Flow Outputs 20 Flow Outputs 20 Flow Outputs 20 Flow Outputs 20 Flow Outputs 21 Flow Outputs 21 Flow Outputs 21 Flow Outputs 21 Flow Outputs 21 Flow Outputs 21 Flow Outputs 21 Flow Outputs 21 Opening the Design 22 Opening the Design 22 Opening the Design 22 Opening the Design 22 Opening the Design 23 Opening the Design 24 Opening the Design 25 Opening the Design 26 Opening the Design 26 Opening the Design 27.
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