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caravel/scripts/set_user_id.py

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#!/usr/bin/env python3
# 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
#----------------------------------------------------------------------
#
# set_user_id.py ---
#
# Manipulate the magic database, GDS, and verilog source files for the
# user_id_programming block to set the user ID number.
#
# The user ID number is a 32-bit value that is passed to this routine
# as an 8-digit hex number. If not given as an option, then the script
# will look for the value of the key "project_id" in the info.yaml file
# in the project top level directory
#
# user_id_programming layout map:
# Positions marked (in microns) for value = 0. For value = 1, move
# the via 0.92um to the left.
#
# Layout grid is 0.46um x 0.34um with half-pitch offset (0.23um, 0.17um)
#
# Signal Via position (um)
# name X Y
#--------------------------------
# mask_rev[0] 14.49 9.35
# mask_rev[1] 16.33 9.35
# mask_rev[2] 10.35 20.23
# mask_rev[3] 8.05 9.35
# mask_rev[4] 28.29 9.35
# mask_rev[5] 21.85 25.67
# mask_rev[6] 8.05 20.23
# mask_rev[7] 20.47 9.35
# mask_rev[8] 17.25 17.85
# mask_rev[9] 25.53 12.07
# mask_rev[10] 22.31 20.23
# mask_rev[11] 13.11 9.35
# mask_rev[12] 23.69 23.29
# mask_rev[13] 24.15 12.07
# mask_rev[14] 13.57 17.85
# mask_rev[15] 23.23 6.97
# mask_rev[16] 24.15 17.85
# mask_rev[17] 8.51 17.85
# mask_rev[18] 23.69 20.23
# mask_rev[19] 10.81 23.29
# mask_rev[20] 14.95 6.97
# mask_rev[21] 18.17 23.29
# mask_rev[22] 21.39 17.85
# mask_rev[23] 26.45 25.67
# mask_rev[24] 9.89 17.85
# mask_rev[25] 15.87 17.85
# mask_rev[26] 26.45 17.85
# mask_rev[27] 8.51 6.97
# mask_rev[28] 10.81 9.35
# mask_rev[29] 27.83 20.23
# mask_rev[30] 16.33 23.29
# mask_rev[31] 8.05 14.79
#----------------------------------------------------------------------
import os
import sys
import re
import subprocess
def usage():
print("Usage:")
print("set_user_id.py [<user_id_value>] [<path_to_project>]")
print("")
print("where:")
print(" <user_id_value> is a character string of eight hex digits, and")
print(" <path_to_project> is the path to the project top level directory.")
print("")
print(" If <user_id_value> is not given, then it must exist in the info.yaml file.")
print(" If <path_to_project> is not given, then it is assumed to be the cwd.")
return 0
if __name__ == '__main__':
# Coordinate pairs in microns for the zero position on each bit
mask_rev = (
(14.49, 9.35), (16.33, 9.35), (10.35, 20.23), ( 8.05, 9.35),
(28.29, 9.35), (21.85, 25.67), ( 8.05, 20.23), (20.47, 9.35),
(17.25, 17.85), (25.53, 12.07), (22.31, 20.23), (13.11, 9.35),
(23.69, 23.29), (24.15, 12.07), (13.57, 17.85), (23.23, 6.97),
(24.15, 17.85), ( 8.51, 17.85), (23.69, 20.23), (10.81, 23.29),
(14.95, 6.97), (18.17, 23.29), (21.39, 17.85), (26.45, 25.67),
( 9.89, 17.85), (15.87, 17.85), (26.45, 17.85), ( 8.51, 6.97),
(10.81, 9.35), (27.83, 20.23), (16.33, 23.29), ( 8.05, 14.79));
optionlist = []
arguments = []
debugmode = False
reportmode = False
for option in sys.argv[1:]:
if option.find('-', 0) == 0:
optionlist.append(option)
else:
arguments.append(option)
if len(arguments) > 2:
print("Wrong number of arguments given to set_user_id.py.")
usage()
sys.exit(0)
if '-debug' in optionlist:
debugmode = True
if '-report' in optionlist:
reportmode = True
user_id_value = None
user_project_path = None
if len(arguments) > 0:
user_id_value = arguments[0]
# Convert to binary
try:
user_id_int = int('0x' + user_id_value, 0)
user_id_bits = '{0:032b}'.format(user_id_int)
except:
user_project_path = arguments[0]
if len(arguments) == 0:
user_project_path = os.getcwd()
elif len(arguments) == 2:
user_project_path = arguments[1]
elif user_project_path == None:
user_project_path = arguments[0]
else:
user_project_path = os.getcwd()
if not os.path.isdir(user_project_path):
print('Error: Project path "' + user_project_path + '" does not exist or is not readable.')
sys.exit(1)
# Check for valid directories
if not user_id_value:
if os.path.isfile(user_project_path + '/info.yaml'):
with open(user_project_path + '/info.yaml', 'r') as ifile:
infolines = ifile.read().splitlines()
for line in infolines:
kvpair = line.split(':')
if len(kvpair) == 2:
key = kvpair[0].strip()
value = kvpair[1].strip()
if key == 'project_id':
user_id_value = value.strip('"\'')
break
if not user_id_value:
print('Error: No project_id key:value pair found in project info.yaml.')
sys.exit(1)
try:
user_id_int = int('0x' + user_id_value, 0)
user_id_bits = '{0:032b}'.format(user_id_int)
except:
print('Error: Cannot parse user ID "' + user_id_value + '" as an 8-digit hex number.')
sys.exit(1)
else:
print('Error: No info.yaml file and no user ID argument given.')
sys.exit(1)
if reportmode:
print(str(user_id_int))
sys.exit(0)
print('Setting project user ID to: ' + user_id_value)
magpath = user_project_path + '/mag'
gdspath = user_project_path + '/gds'
vpath = user_project_path + '/verilog'
errors = 0
if not os.path.isdir(gdspath):
print('No directory ' + gdspath + ' found (path to GDS).')
sys.exit(1)
if not os.path.isdir(vpath):
print('No directory ' + vpath + ' found (path to verilog).')
sys.exit(1)
if not os.path.isdir(magpath):
print('No directory ' + magpath + ' found (path to magic databases).')
sys.exit(1)
print('Step 1: Modify GDS of the user_id_programming subcell')
# Bytes leading up to via position are:
viarec = "00 06 0d 02 00 43 00 06 0e 02 00 2c 00 2c 10 03 "
viabytes = bytes.fromhex(viarec)
# Check for either GDS file being gzipped
gdsbakgz = gdspath + '/user_id_prog_zero.gds.gz'
gdsfilegz = gdspath + '/user_id_programming.gds.gz'
if os.path.isfile(gdsbakgz):
subprocess.run(['gunzip', gdsbakgz],
stdout = subprocess.DEVNULL,
stderr = subprocess.DEVNULL)
zero_zipped = True
else:
zero_zipped = False
if os.path.isfile(gdsfilegz):
subprocess.run(['gunzip', gdsfilegz],
stdout = subprocess.DEVNULL,
stderr = subprocess.DEVNULL)
file_zipped = True
else:
file_zipped = False
# Read the GDS file. If a backup was made of the zero-value
# program, then use it.
gdsbak = gdspath + '/user_id_prog_zero.gds'
gdsfile = gdspath + '/user_id_programming.gds'
if os.path.isfile(gdsbak):
with open(gdsbak, 'rb') as ifile:
gdsdata = ifile.read()
else:
with open(gdsfile, 'rb') as ifile:
gdsdata = ifile.read()
for i in range(0,32):
# Ignore any zero bits.
if user_id_bits[i] == '0':
continue
coords = mask_rev[i]
xum = coords[0]
yum = coords[1]
# Contact is 0.17 x 0.17, so add and subtract 0.085 to get
# the corner positions.
xllum = xum - 0.085
yllum = yum - 0.085
xurum = xum + 0.085
yurum = yum + 0.085
# Get the 4-byte hex values for the corner coordinates
xllnm = round(xllum * 1000)
yllnm = round(yllum * 1000)
xllhex = '{0:08x}'.format(xllnm)
yllhex = '{0:08x}'.format(yllnm)
xurnm = round(xurum * 1000)
yurnm = round(yurum * 1000)
xurhex = '{0:08x}'.format(xurnm)
yurhex = '{0:08x}'.format(yurnm)
# Magic's GDS output for vias always starts at the lower left
# corner and goes counterclockwise, repeating the first point.
viaoldposdata = viarec + xllhex + yllhex + xurhex + yllhex
viaoldposdata += xurhex + yurhex + xllhex + yurhex + xllhex + yllhex
# For "one" bits, the X position is moved 0.92 microns to the left
newxllum = xllum - 0.92
newxurum = xurum - 0.92
# Get the 4-byte hex values for the new corner coordinates
newxllnm = round(newxllum * 1000)
newxllhex = '{0:08x}'.format(newxllnm)
newxurnm = round(newxurum * 1000)
newxurhex = '{0:08x}'.format(newxurnm)
vianewposdata = viarec + newxllhex + yllhex + newxurhex + yllhex
vianewposdata += newxurhex + yurhex + newxllhex + yurhex + newxllhex + yllhex
# Diagnostic
if debugmode:
print('Bit ' + str(i) + ':')
print('Via position ({0:3.2f}, {1:3.2f}) to ({2:3.2f}, {3:3.2f})'.format(xllum, yllum, xurum, yurum))
print('Old hex string = ' + viaoldposdata)
print('New hex string = ' + vianewposdata)
# Convert hex strings to byte arrays
viaoldbytedata = bytearray.fromhex(viaoldposdata)
vianewbytedata = bytearray.fromhex(vianewposdata)
# Replace the old data with the new
if viaoldbytedata not in gdsdata:
print('Error: via not found for bit position ' + str(i))
errors += 1
else:
gdsdata = gdsdata.replace(viaoldbytedata, vianewbytedata)
if errors == 0:
# Keep a copy of the original
if not os.path.isfile(gdsbak):
if file_zipped:
os.rename(gdsfilegz, gdsbakgz)
else:
os.rename(gdsfile, gdsbak)
with open(gdsfile, 'wb') as ofile:
ofile.write(gdsdata)
if file_zipped:
subprocess.run(['gzip', gdsdata, '-n', '--best'],
stdout = subprocess.DEVNULL,
stderr = subprocess.DEVNULL)
print('Done!')
else:
print('There were errors in processing. No file written.')
print('Ending process.')
sys.exit(1)
print('Step 2: Add user project ID parameter to verilog.')
changed = False
with open(vpath + '/rtl/caravel.v', 'r') as ifile:
vlines = ifile.read().splitlines()
outlines = []
for line in vlines:
oline = re.sub("parameter USER_PROJECT_ID = 32'h[0-9A-F]+;",
"parameter USER_PROJECT_ID = 32'h" + user_id_value + ";",
line)
if oline != line:
changed = True
outlines.append(oline)
if changed:
with open(vpath + '/rtl/caravel.v', 'w') as ofile:
for line in outlines:
print(line, file=ofile)
print('Done!')
else:
print('Error: No substitutions done on verilog/rtl/caravel.v.')
print('Ending process.')
sys.exit(1)
print('Step 3: Add user project ID text to top level layout.')
with open(magpath + '/user_id_textblock.mag', 'r') as ifile:
maglines = ifile.read().splitlines()
outlines = []
digit = 0
for line in maglines:
if 'alphaX_' in line:
dchar = user_id_value[digit].upper()
oline = re.sub('alpha_[0-9A-F]', 'alpha_' + dchar, line)
outlines.append(oline)
digit += 1
else:
outlines.append(line)
if digit == 8:
with open(magpath + '/user_id_textblock.mag', 'w') as ofile:
for line in outlines:
print(line, file=ofile)
print('Done!')
elif digit == 0:
print('Error: No digits were replaced in the layout.')
else:
print('Error: Only ' + str(digit) + ' digits were replaced in the layout.')
sys.exit(0)
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