# 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

# sky130A.par --- Parameter file for GrayWolf
# NOTE:  all distance units are in centimicrons unless otherwise stated
# WARNING: this is NOT tcl syntax! No Comments on end of actual data line.
# The vast majority of quantities here are not used (read instead from techLEF, etc.)

RULES
    # values are resistance in ohms/sq and capacitance in fF/um^2
    # TODO: properly pick directions
    layer metal1 0.105 0.0001 horizontal
    layer metal2 0.105 0.0001 vertical
    layer metal3 0.105 0.0001 horizontal
    layer metal4 0.105 0.0001 vertical
    layer metal5 0.105 0.0001 horizontal

    via via12 metal1 metal2
    via via23 metal2 metal3
    via via34 metal3 metal4
    via via45 metal4 metal5

              # 0.5 um
    width metal1 50
    width metal2 60
              # 0.6 um
    width metal3 60
    width metal4 60
    width metal5 60

    # TODO verify these two numbers
    width via12 50
    width via23 50
    width via34 50
    width via45 50

    # Set spacing = track pitch - width, so that GrayWolf places pins
    # on the right pitch.
    # Pitches are (in um):
    # metal1 = 200,  metal2 = 160,  metal3 = 200,  metal4 = 320
## pitch m1: 1.3um  m2: 1.4um  m3: 1.3um
## width m1: 0.5um  m2: 0.6um  m3: 0.6um
## space     0.8        0.8        0.7     (pitch calc)
## fab-space 0.45       0.5        0.6

    spacing metal1 metal1 80
    spacing metal2 metal2 80
    spacing metal3 metal3 80
    spacing metal4 metal4 80
    spacing metal5 metal5 80

    # (WAS:) Stacked vias allowed
    # spacing via12 via23 0

    # To disable Stacked?: give non-zero spacing (centimicrons = 10 nanometer = 1/100 of micron)
    # TODO need real value here:
    spacing via12 via23 0
    spacing via23 via34 0
    spacing via34 via45 0

                       # .2um .15um
    overhang via12 metal1 20
    overhang via12 metal2 15

    overhang via23 metal2 20
    overhang via23 metal3 15

    overhang via34 metal3 14
    overhang via34 metal4 16
    overhang via45 metal4 14
    overhang via45 metal5 16
ENDRULES

*vertical_wire_weight : 1.0
*vertical_path_weight : 1.0
*padspacing           : variable
*rowSep		      : 0.0   0
# min pitch of m1,m2,m3 (FIXME):
*track.pitch	      : 130
*graphics.wait        : off
*last_chance.wait     : off
*random.seed	      : 12345
# TODO: proper track.pitch number above, plus feedThruWidth below

TWMC*chip.aspect.ratio : 1.0

# FIXME:  Change width to width of minimum fill cell
TWSC*feedThruWidth    : 280 layer 1
TWSC*do.global.route  : on
TWSC*ignore_feeds     : true
TWSC*call_row_evener  : true
TWSC*even_rows_maximally : true
# TWSC*no.graphics    : on

GENR*row_to_tile_spacing: 1
# GENR*numrows		: 6
GENR*flip_alternate_rows : 1