librelane

# Copyright 2025 LibreLane Contributors
#
# Adapted from OpenLane
#
# Copyright 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.

crashbackups disable
locking disable
units internal

# Read in maglef views in order to blackbox cells
if { [info exists ::env(MAGIC_DRC_MAGLEFS)] } {
    foreach {maglef} $::env(MAGIC_DRC_MAGLEFS) {
        puts "Loading maglef view: $maglef"
        load $maglef
    }
}

# Enable gds noduplicates to ignore cells
# that have been previously loaded as maglef
gds noduplicates true
gds readonly true

# Enable maskhints so that DRC rules against generated layers are run
# against the closest possible version to what's actually in the GDS
gds maskhints true

# Flatten cells
if { [info exists ::env(MAGIC_GDS_FLATGLOB)] } {
    foreach {gds_flatglob} $::env(MAGIC_GDS_FLATGLOB) {
        gds flatglob $gds_flatglob
    }
}

if { $::env(MAGIC_DRC_USE_GDS) } {
    gds read $::env(CURRENT_GDS)
} else {
    source $::env(SCRIPTS_DIR)/magic/common/read.tcl
    read_tech_lef
    read_pdk_lef
    read_macro_lef
    read_extra_lef
    read_pad_lef
    read_def
}

set report_dir $::env(STEP_DIR)/reports

set drc_rpt_path $report_dir/drc.magic.rpt
set fout [open $drc_rpt_path w]
set oscale [cif scale out]
set cell_name $::env(DESIGN_NAME)
magic::suspendall
puts stdout "\[INFO\] Loading $cell_name\n"
flush stdout
load $cell_name
select top cell
drc euclidean on
drc style drc(full)
drc check
set drcresult [drc listall why]


set count 0
puts $fout "$cell_name"
puts $fout "----------------------------------------"
foreach {errtype coordlist} $drcresult {
    puts $fout $errtype
    puts $fout "----------------------------------------"
    foreach coord $coordlist {
        set bllx [expr {$oscale * [lindex $coord 0]}]
        set blly [expr {$oscale * [lindex $coord 1]}]
        set burx [expr {$oscale * [lindex $coord 2]}]
        set bury [expr {$oscale * [lindex $coord 3]}]
        set coords [format " %.3fum %.3fum %.3fum %.3fum" $bllx $blly $burx $bury]
        puts $fout "$coords"
        set count [expr {$count + 1} ]
    }
    puts $fout "----------------------------------------"
}

puts $fout "\[INFO\] COUNT: $count"
puts $fout "\[INFO\] Should be divided by 3 or 4"

puts $fout ""
close $fout

puts stdout "\[INFO\] COUNT: $count"
puts stdout "\[INFO\] Should be divided by 3 or 4"
puts stdout "\[INFO\] DRC Checking DONE ($drc_rpt_path)"
flush stdout

set views_dir $::env(STEP_DIR)/views
file mkdir $views_dir

set mag_view $views_dir/$::env(DESIGN_NAME).drc.mag
puts stdout "\[INFO\] Saving mag view with DRC errors ($mag_view)"
# WARNING: changes the name of the cell; keep as last step
save $mag_view
puts stdout "\[INFO\] Saved"