OpenROAD complete backend with nangate45

vlsi/.gitignore

@@ -3,4 +3,5 @@ __pycache__
 hammer*.log
 build
 src/test/output-*.json
-generated-src
+generated-src
+output.json

vlsi/Makefile

@@ -19,25 +19,27 @@ include $(base_dir)/variables.mk
 #########################################################################################
 sim_name           ?= vcs # needed for GenerateSimFiles, but is unused
 tech_name          ?= asap7
-tech_dir           ?= $(if $(filter $(tech_name), asap7), $(vlsi_dir)/hammer/src/hammer-vlsi/technology/$(tech_name), $(vlsi_dir)/hammer-$(tech_name)-plugin/$(tech_name))
+tech_dir           ?= $(if $(filter $(tech_name),asap7 nangate45),\
+                        $(vlsi_dir)/hammer/src/hammer-vlsi/technology/$(tech_name), \
+                        $(vlsi_dir)/hammer-$(tech_name)-plugin/$(tech_name))
 SMEMS_COMP         ?= $(tech_dir)/sram-compiler.json
 SMEMS_CACHE        ?= $(tech_dir)/sram-cache.json
 SMEMS_HAMMER       ?= $(build_dir)/$(long_name).mems.hammer.json
-ifeq ($(tech_name),asap7)
-	MACROCOMPILER_MODE ?= --mode synflops
-else
-	MACROCOMPILER_MODE ?= -l $(SMEMS_CACHE) -hir $(SMEMS_HAMMER)
-endif
+MACROCOMPILER_MODE ?= $(if $(filter $(tech_name),asap7),\
+                        --mode synflops,\
+                        -l $(SMEMS_CACHE) -hir $(SMEMS_HAMMER) --mode strict)
 ENV_YML            ?= $(vlsi_dir)/env.yml
-INPUT_CONFS        ?= example.yml
-HAMMER_EXEC        ?= ./example-vlsi
+INPUT_CONFS        ?= $(if $(filter $(tech_name),nangate45),\
+                        example-nangate45.yml,\
+                        example-asap7.yml)
+HAMMER_EXEC        ?= example-vlsi
 VLSI_TOP           ?= $(TOP)
 VLSI_HARNESS_DUT_NAME ?= dut
 VLSI_OBJ_DIR       ?= $(vlsi_dir)/build
-ifneq ($(CUSTOM_VLOG), )
-	OBJ_DIR        ?= $(VLSI_OBJ_DIR)/custom-$(VLSI_TOP)
+ifneq ($(CUSTOM_VLOG),)
+	OBJ_DIR          ?= $(VLSI_OBJ_DIR)/custom-$(VLSI_TOP)
 else
-	OBJ_DIR        ?= $(VLSI_OBJ_DIR)/$(long_name)-$(VLSI_TOP)
+	OBJ_DIR          ?= $(VLSI_OBJ_DIR)/$(long_name)-$(VLSI_TOP)
 endif
 
 #########################################################################################

vlsi/example-nangate45.yml

@@ -0,0 +1,73 @@
+#----------------------
+# Technology Setup
+#----------------------
+
+vlsi.core.technology: nangate45
+
+# the nangate45.tech.json can't reference the $OPENROAD environment variable,
+# so we need to set the install dir here. 
+# TODO: figure out how to remove this, or override it within OpenROADTool
+technology.nangate45.install_dir: "/k/work/OpenROAD-flow/tools/OpenROAD"
+
+vlsi.core.max_threads: 12
+
+#----------------------
+# General Hammer Inputs
+#----------------------
+
+# Hammer will auto-generate a CPF for simple power designs; 
+# see hammer/src/hammer-vlsi/defaults.yml for more info
+vlsi.inputs.power_spec_mode: "auto"
+vlsi.inputs.power_spec_type: "cpf"
+
+# Specify clock signals
+vlsi.inputs.clocks: [
+  {name: "clock", period: "5ns", uncertainty: "0.5ns"}
+]
+
+# Generate Make include to aid in flow 
+vlsi.core.build_system: make
+
+#----------------------
+# Placement Constraints
+#----------------------
+
+# For nangate45, size should be multiple of (0.19,1.4) placement grid
+vlsi.inputs.placement_constraints:
+  - path: "ChipTop"
+    type: toplevel
+    x: 0
+    y: 0
+    width: 3334.72
+    height: 3798.2
+    margins: 
+      left: 0
+      right: 0
+      top: 0
+      bottom: 0
+
+# SRAM Compiler compiler options
+vlsi.core.sram_generator_tool: "sram_compiler"
+## You should specify a location for the SRAM generator in the tech plugin
+vlsi.core.sram_generator_tool_path: [
+  "hammer/src/hammer-vlsi/technology/nangate45"]
+vlsi.core.sram_generator_tool_path_meta: "append"
+
+#----------------------
+# Tool options. Replace with your tool plugin of choice.
+#----------------------
+
+# OpenROAD-yosys options
+vlsi.core.synthesis_tool: "yosys"
+vlsi.core.synthesis_tool_path: ["hammer/src/hammer-vlsi/synthesis/yosys"]
+vlsi.core.synthesis_tool_path_meta: "append"
+
+# OpenROAD-par options
+vlsi.core.par_tool: "openroad"
+vlsi.core.par_tool_path: ["hammer/src/hammer-vlsi/par"]
+vlsi.core.par_tool_path_meta: "append"
+
+# OpenROAD-drc options (no lvs)
+vlsi.core.drc_tool: "openroad"
+vlsi.core.drc_tool_path: ["hammer/src/hammer-vlsi/drc"]
+vlsi.core.drc_tool_path_meta: "append"

vlsi/example-vlsi

@@ -1,4 +1,8 @@
 #!/usr/bin/env python3
+#
+# NOTE: this ExampleDriver works for asap7 and nangate45. the custom hooks are
+# only used for asap7 though.
+
 import os
 
 import hammer_vlsi
@@ -7,21 +11,24 @@ from hammer_vlsi import CLIDriver, HammerToolHookAction
 from typing import Dict, Callable, Optional, List
 
 def example_place_tap_cells(x: hammer_vlsi.HammerTool) -> bool:
-    x.append('''
+    if x.get_setting("vlsi.core.technology") == "asap7":
+        x.append('''
 # TODO
 # Place custom TCL here
 ''')
     return True
 
 def example_add_fillers(x: hammer_vlsi.HammerTool) -> bool:
-    x.append('''
+    if x.get_setting("vlsi.core.technology") == "asap7":
+        x.append('''
 # TODO
 # Place custom TCL here
 ''')
     return True
 
 def example_tool_settings(x: hammer_vlsi.HammerTool) -> bool:
-    x.append('''
+    if x.get_setting("vlsi.core.technology") == "asap7":
+        x.append('''
 # TODO
 # Place custom TCL here
 set_db route_design_bottom_routing_layer 2
@@ -34,7 +41,8 @@ def scale_final_gds(x: hammer_vlsi.HammerTool) -> bool:
     Scale the final GDS by a factor of 4
     hammer/src/hammer-vlsi/technology/asap7/__init__.py implements scale_gds_script
     """
-    x.append('''
+    if x.get_setting("vlsi.core.technology") == "asap7":
+        x.append('''
 # Write script out to a temporary file and execute it
 set fp [open "{script_file}" "w"]
 puts -nonewline $fp "{script_text}"