# Copyright 2022 GlobalFoundries PDK Authors
#
# 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
#
#     https://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.

#=============================================================================================================================================================
#---------------------------------------------------------- GF 0.18um MCU DRC RULE DECK (3.3V SRAM) ----------------------------------------------------------
#=============================================================================================================================================================

require 'time'
require "logger"

exec_start_time = Time.now

logger = Logger.new(STDOUT)

logger.formatter = proc do |severity, datetime, progname, msg|
  "#{datetime}: Memory Usage (" + `pmap #{Process.pid} | tail -1`[10,40].strip + ") : #{msg}
"
end

#================================================
#----------------- FILE SETUP -------------------
#================================================

# optional for a batch launch :   klayout -b -r gf180mcu.drc -rd input=design.gds -rd report=gf180mcu_main.lyrdb

logger.info("Starting running GF180MCU Klayout DRC runset on %s" % [$input])

if $input
    if $topcell
        source($input, $topcell)
    else
        source($input)
    end
end

logger.info("Loading database to memory is complete.")

if $report
    logger.info("GF180MCU Klayout DRC runset output at: %s" % [$report])
    report("DRC Run Report at", $report)
else
    logger.info("GF180MCU Klayout DRC runset output at default location." % [File.join(File.dirname(RBA::CellView::active.filename), "gf180_drc.lyrdb").path])
    report("DRC Run Report at", File.join(File.dirname(RBA::CellView::active.filename), "gf180_drc.lyrdb"))
end

if $thr
    logger.info("Number of threads to use %s" % [$thr])
    threads($thr)
else
    logger.info("Number of threads to use 16")
    threads(16)
end

# === TILING MODE ===
if $run_mode == "tiling"
  # use a tile size of 1mm - not used in deep mode-
  # tiles(500.um)
  # use a tile border of 10 micron:
  # tile_borders(10.um)
  tiles(1000)
  logger.info("Tiling  mode is enabled.")

elsif $run_mode == "deep"
  #=== HIER MODE ===
  deep
  logger.info("deep  mode is enabled.")

elsif $run_mode == "flat"
  #=== FLAT MODE ===
  flat
  logger.info("flat  mode is enabled.")

else
  #=== FLAT MODE ===
  flat
  logger.info("flat  mode is enabled.")

end # run_mode

#================================================
#------------- LAYERS DEFINITIONS ---------------
#================================================

v5_xtor        = polygons(112, 1 )
dualgate       = polygons(55 , 0 )
poly2          = polygons(30 , 0 )
nplus          = polygons(32 , 0 )
pplus          = polygons(31 , 0 )
comp           = polygons(22 , 0 )
dnwell         = polygons(12 , 0 )
nwell          = polygons(21 , 0 )
contact        = polygons(33 , 0 )
metal1         = polygons(34 , 0 )
sramcore       = polygons(108, 5 )

logger.info("Starting deriving base layers.")
#================================================
#------------- LAYERS DERIVATIONS ---------------
#================================================

ncomp      =  comp      & nplus
pcomp      =  comp      & pplus
tgate      =  poly2     & comp
ngate      =  nplus     & tgate
pgate      =  pplus     & tgate

#================================================
#------------------ SWITCHES --------------------
#================================================
logger.info("Evaluate switches.")

# FEOL
if $feol == "false"
  FEOL = $feol
  logger.info("FEOL is disabled.")
else
  FEOL = "true"
  logger.info("FEOL is enabled.")
end # FEOL

# BEOL
if $beol == "false"
  BEOL = $beol
  logger.info("BEOL is disabled.")
else
  BEOL = "true"
  logger.info("BEOL is enabled.")
end # BEOL

# connectivity rules
if $conn_drc == "true"
  CONNECTIVITY_RULES = $conn_drc
  logger.info("connectivity rules are enabled.")
else
  CONNECTIVITY_RULES = false
  logger.info("connectivity rules are disabled.")
end # connectivity rules

# METAL_TOP
if $metal_top
  METAL_TOP = $metal_top
else
  METAL_TOP = "9K"
end # METAL_TOP

logger.info("METAL_TOP Selected is %s" % [METAL_TOP])

# METAL_LEVEL
if $metal_level
  METAL_LEVEL = $metal_level
else
  METAL_LEVEL = "6LM"
end # METAL_LEVEL

logger.info("METAL_STACK Selected is %s" % [METAL_LEVEL])

# WEDGE
if $wedge == "false"
  WEDGE = $wedge
else
  WEDGE = "true"
end # WEDGE

logger.info("Wedge enabled  %s" % [WEDGE])

# BALL
if $ball == "false"
  BALL = $ball
else
  BALL = "true"
end # BALL

logger.info("Ball enabled  %s" % [BALL])

# GOLD
if $gold == "false"
  GOLD = $gold
else
  GOLD = "true"
end # GOLD

logger.info("Gold enabled  %s" % [GOLD])

if $mim_option
  MIM_OPTION = $mim_option
else
  MIM_OPTION = "Nan"
end

logger.info("MIM Option selected %s" % [MIM_OPTION])

# OFFGRID
if $offgrid == "false"
  OFFGRID = false
else
  OFFGRID = true
end # OFFGRID

logger.info("Offgrid enabled  %s" % [OFFGRID])

#================================================
#-------------------3.3V SRAM--------------------
#================================================

# Rule S.DF.4c_LV: Min. (Nwell overlap of PCOMP) outside DNWELL. is 0.4µm
logger.info("Executing rule S.DF.4c_LV")
sdf4c_l1 = nwell.outside(dnwell).inside(sramcore).enclosing(pcomp.outside(dnwell).inside(sramcore), 0.4.um, euclidian).polygons(0.001)
sdf4c_l2 = pcomp.outside(dnwell).inside(sramcore).not_outside(nwell.outside(dnwell).inside(sramcore)).not(nwell.outside(dnwell).inside(sramcore))
sdf4c_l  = sdf4c_l1.or(sdf4c_l2).not_interacting(v5_xtor).not_interacting(dualgate)
sdf4c_l.output("S.DF.4c_LV", "S.DF.4c_LV : Min. (Nwell overlap of PCOMP) outside DNWELL. : 0.4µm")
sdf4c_l1.forget
sdf4c_l2.forget
sdf4c_l.forget

# Rule S.DF.16_LV: Min. space from (Nwell outside DNWELL) to (NCOMP outside Nwell and DNWELL). is 0.4µm
logger.info("Executing rule S.DF.16_LV")
sdf16_l1  = ncomp.outside(nwell).outside(dnwell).inside(sramcore).separation(nwell.outside(dnwell).inside(sramcore), 0.4.um, euclidian).polygons(0.001).not_interacting(v5_xtor).not_interacting(dualgate)
sdf16_l1.output("S.DF.16_LV", "S.DF.16_LV : Min. space from (Nwell outside DNWELL) to (NCOMP outside Nwell and DNWELL). : 0.4µm")
sdf16_l1.forget

# Rule S.CO.3_LV: Poly2 overlap of contact. is 0.04µm
logger.info("Executing rule S.CO.3_LV")
sco3_l1 = poly2.inside(sramcore).enclosing(contact.inside(sramcore), 0.04.um, euclidian).polygons(0.001)
sco3_l2 = contact.inside(sramcore).not_outside(poly2.inside(sramcore)).not(poly2.inside(sramcore))
sco3_l  = sco3_l1.or(sco3_l2).not_interacting(v5_xtor).not_interacting(dualgate)
sco3_l.output("S.CO.3_LV", "S.CO.3_LV : Poly2 overlap of contact. : 0.04µm")
sco3_l1.forget
sco3_l2.forget
sco3_l.forget

# Rule S.CO.4_LV: COMP overlap of contact. is 0.03µm
logger.info("Executing rule S.CO.4_LV")
sco4_l1 = comp.inside(sramcore).enclosing(contact.inside(sramcore), 0.03.um, euclidian).polygons(0.001)
sco4_l2 = contact.inside(sramcore).not_outside(comp.inside(sramcore)).not(comp.inside(sramcore))
sco4_l  = sco4_l1.or(sco4_l2).not_interacting(v5_xtor).not_interacting(dualgate)
sco4_l.output("S.CO.4_LV", "S.CO.4_LV : COMP overlap of contact. : 0.03µm")
sco4_l1.forget
sco4_l2.forget
sco4_l.forget

# Rule S.CO.6_ii_LV: (ii) If Metal1 overlaps contact by < 0.04um on one side, adjacent metal1 edges overlap
logger.info("Executing rule S.CO.6_ii_LV")
sco6_l1 = metal1.and(sramcore).enclosing(contact.inside(sramcore), 0.02.um, euclidian).polygons(0.001).or(contact.inside(sramcore).not(metal1.inside(sramcore))).not_interacting(v5_xtor).not_interacting(dualgate)
sco6_l1.output("S.CO.6_ii_LV", "S.CO.6_ii_LV : (ii) If Metal1 overlaps contact by < 0.04um on one side, adjacent metal1 edges overlap")
sco6_l1.forget

# Rule S.M1.1_LV: min. metal1 width is 0.22µm
logger.info("Executing rule S.M1.1_LV")
sm11_l1  = metal1.and(sramcore).width(0.22.um, euclidian).polygons(0.001).not_interacting(v5_xtor).not_interacting(dualgate)
sm11_l1.output("S.M1.1_LV", "S.M1.1_LV : min. metal1 width : 0.22µm")
sm11_l1.forget


exec_end_time = Time.now
run_time = exec_end_time - exec_start_time
logger.info("DRC Run time %f seconds" % [run_time])