# SPDX-FileCopyrightText: 2020 Efabless Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# SPDX-License-Identifier: Apache-2.0

# cannot commit files larger than 100 MB to GitHub
FILE_SIZE_LIMIT_MB = 100
LARGE_FILES := $(shell find ./gds -type f -name "*.gds")
LARGE_FILES += $(shell find . -type f -size +$(FILE_SIZE_LIMIT_MB)M -not -path "./.git/*" -not -path "./gds/*" -not -path "./openlane/*")

LARGE_FILES_GZ := $(addsuffix .gz, $(LARGE_FILES))

ARCHIVES := $(shell find . -type f -name "*.gz")
ARCHIVE_SOURCES := $(basename $(ARCHIVES))

# PDK setup configs
THREADS ?= $(shell nproc)
STD_CELL_LIBRARY ?= sky130_fd_sc_hd
SPECIAL_VOLTAGE_LIBRARY ?= sky130_fd_sc_hvl
IO_LIBRARY ?= sky130_fd_io
SKYWATER_COMMIT ?= 3d7617a1acb92ea883539bcf22a632d6361a5de4
OPEN_PDKS_COMMIT ?= 32cdb2097fd9a629c91e8ea33e1f6de08ab25946

.DEFAULT_GOAL := ship
# We need portable GDS_FILE pointers...
.PHONY: ship
ship: check-env uncompress
	@echo "###############################################"
	@echo "Generating Caravel GDS (sources are in the 'gds' directory)"
	@sleep 1
	@cp gds/caravel.gds gds/caravel.old.gds && echo "Copying old Caravel to gds/caravel.old.gds" || true
	@cd gds && MAGTYPE=mag magic -rcfile ${PDK_ROOT}/sky130A/libs.tech/magic/current/sky130A.magicrc -noc -dnull gen_caravel.tcl < /dev/null


.PHONY: clean
clean:
	echo "clean"


.PHONY: verify
verify:
	echo "verify"


$(LARGE_FILES_GZ): %.gz: %
	@if ! [ $(suffix $<) == ".gz" ]; then\
		gzip -n --best $< > /dev/null &&\
		echo "$< -> $@";\
	fi

# This target compresses all files larger than $(FILE_SIZE_LIMIT_MB) MB
.PHONY: compress
compress: $(LARGE_FILES_GZ)
	@echo "Files larger than $(FILE_SIZE_LIMIT_MB) MBytes are compressed!"


$(ARCHIVE_SOURCES): %: %.gz
	@gzip -d $< &&\
	echo "$< -> $@";\

.PHONY: uncompress
uncompress: $(ARCHIVE_SOURCES)
	@echo "All files are uncompressed!"


# LVS
BLOCKS = $(shell cd openlane && find * -maxdepth 0 -type d)
LVS_BLOCKS = $(foreach block, $(BLOCKS), lvs-$(block))
$(LVS_BLOCKS): lvs-% : ./mag/%.mag ./verilog/gl/%.v
	echo "Extracting $*"
	mkdir -p ./mag/tmp
	echo "load $* -dereference;\
		select top cell;\
		foreach cell [cellname list children] {\
			load \$$cell -dereference;\
			property LEFview TRUE;\
		};\
		load $* -dereference;\
		select top cell;\
		extract no all;\
		extract do local;\
		extract unique;\
		extract;\
		ext2spice lvs;\
		ext2spice $*.ext;\
		feedback save extract_$*.log;\
		exit;" > ./mag/extract_$*.tcl
	cd mag && export MAGTYPE=maglef; magic -rcfile ${PDK_ROOT}/sky130A/libs.tech/magic/current/sky130A.magicrc -noc -dnull extract_$*.tcl < /dev/null
	mv ./mag/$*.spice ./spi/lvs
	rm ./mag/*.ext
	mv -f ./mag/extract_$*.{tcl,log} ./mag/tmp
	####
	mkdir -p ./spi/lvs/tmp
	sh ./spi/lvs/run_lvs.sh ./spi/lvs/$*.spice ./verilog/gl/$*.v $*
	@echo ""
	python3 ./scripts/count_lvs.py -f ./verilog/gl/$*.v_comp.json
	mv -f ./verilog/gl/*{.out,.json,.log} ./spi/lvs/tmp 2> /dev/null || true
	@echo ""
	@echo "LVS: ./spi/lvs/$*.spice vs. ./verilog/gl/$*.v"
	@echo "Comparison result: ./spi/lvs/tmp/$*.v_comp.out"

# connect-by-label is enabled here!
LVS_MAGLEF_BLOCKS = $(foreach block, $(BLOCKS), lvs-maglef-$(block))
$(LVS_MAGLEF_BLOCKS): lvs-maglef-% : ./mag/%.mag ./verilog/gl/%.v
	echo "Extracting $*"
	mkdir -p ./maglef/tmp
	echo "load $* -dereference;\
		select top cell;\
		foreach cell [cellname list children] {\
			load \$$cell -dereference;\
			property LEFview TRUE;\
		};\
		load $* -dereference;\
		select top cell;\
		extract no all;\
		extract do local;\
		extract;\
		ext2spice lvs;\
		ext2spice $*.ext;\
		feedback save extract_$*.log;\
		exit;" > ./mag/extract_$*.tcl
	cd mag && export MAGTYPE=maglef; magic -noc -dnull extract_$*.tcl < /dev/null
	mv ./mag/$*.spice ./spi/lvs
	rm ./maglef/*.ext
	mv -f ./mag/extract_$*.{tcl,log} ./maglef/tmp
	####
	mkdir -p ./spi/lvs/tmp
	sh ./spi/lvs/run_lvs.sh ./spi/lvs/$*.spice ./verilog/gl/$*.v $*
	@echo ""
	python3 ./scripts/count_lvs.py -f ./verilog/gl/$*.v_comp.json
	mv -f ./verilog/gl/*{.out,.json,.log} ./spi/lvs/tmp 2> /dev/null || true
	@echo ""
	@echo "LVS: ./spi/lvs/$*.spice vs. ./verilog/gl/$*.v"
	@echo "Comparison result: ./spi/lvs/tmp/$*.v_comp.out"

# DRC
BLOCKS = $(shell cd openlane && find * -maxdepth 0 -type d)
DRC_BLOCKS = $(foreach block, $(BLOCKS), drc-$(block))
$(DRC_BLOCKS): drc-% : ./gds/%.gds
	echo "Running DRC on $*"
	mkdir -p ./gds/tmp
	cd gds && export DESIGN_IN_DRC=$* && export MAGTYPE=mag; magic -rcfile ${PDK_ROOT}/sky130A/libs.tech/magic/current/sky130A.magicrc -noc -dnull drc_on_gds.tcl < /dev/null
	@echo "DRC result: ./gds/tmp/$*.drc"

mag2gds: check-env
	echo "\
		gds readonly true; \
		gds rescale false; \
		load caravel -dereference;\
		select top cell;\
		gds write caravel.gds; \
		exit;" > ./mag/mag2gds_caravel.tcl
	@cd mag && PDKPATH=${PDK_ROOT}/sky130A magic -noc -dnull mag2gds_caravel.tcl < /dev/null
	@rm ./mag/mag2gds_caravel.tcl
	mv -f ./gds/caravel.gds ./gds/caravel.old.gds
	mv ./mag/caravel.gds ./gds

.PHONY: help
help:
	@$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null | awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | sort | egrep -v -e '^[^[:alnum:]]' -e '^$@$$'

		
###########################################################################
.PHONY: pdk
pdk: skywater-pdk skywater-library open_pdks build-pdk

$(PDK_ROOT)/skywater-pdk:
	git clone https://github.com/google/skywater-pdk.git $(PDK_ROOT)/skywater-pdk

.PHONY: skywater-pdk
skywater-pdk: check-env $(PDK_ROOT)/skywater-pdk
	cd $(PDK_ROOT)/skywater-pdk && \
		git checkout master && git pull && \
		git checkout -qf $(SKYWATER_COMMIT)

.PHONY: skywater-library
skywater-library: check-env $(PDK_ROOT)/skywater-pdk
	cd $(PDK_ROOT)/skywater-pdk && \
		git submodule update --init libraries/$(STD_CELL_LIBRARY)/latest && \
		git submodule update --init libraries/$(IO_LIBRARY)/latest && \
		git submodule update --init libraries/$(SPECIAL_VOLTAGE_LIBRARY)/latest && \
		$(MAKE) -j$(THREADS) timing

### OPEN_PDKS
$(PDK_ROOT)/open_pdks:
	git clone https://github.com/RTimothyEdwards/open_pdks.git $(PDK_ROOT)/open_pdks

.PHONY: open_pdks
open_pdks: check-env $(PDK_ROOT)/open_pdks
	cd $(PDK_ROOT)/open_pdks && \
		git checkout master && git pull && \
		git checkout -qf $(OPEN_PDKS_COMMIT)

.PHONY: build-pdk
build-pdk: check-env $(PDK_ROOT)/open_pdks $(PDK_ROOT)/skywater-pdk
	[ -d $(PDK_ROOT)/sky130A ] && \
		(echo "Warning: A sky130A build already exists under $(PDK_ROOT). It will be deleted first!" && \
		sleep 5 && \
		rm -rf $(PDK_ROOT)/sky130A) || \
		true
	cd $(PDK_ROOT)/open_pdks && \
		./configure --with-sky130-source=$(PDK_ROOT)/skywater-pdk/libraries --with-sky130-local-path=$(PDK_ROOT) && \
		cd sky130 && \
		$(MAKE) veryclean && \
		$(MAKE) && \
		$(MAKE) install-local

.RECIPE: manifest
manifest:
	cd verilog/rtl/ && \
	find * -type f ! -name "user_*.v" ! -name "manifest" ! -name "README" ! -name "defines.v" -exec shasum {} \; > manifest && \
	cd ../../maglef/ && \
	shasum *.mag > manifest && \
	cd ../mag/ && \
	shasum caravel.mag .magicrc > manifest


check-env:
ifndef PDK_ROOT
	$(error PDK_ROOT is undefined, please export it before running make)
endif