mirror of https://github.com/openXC7/prjxray.git
115 lines
2.7 KiB
Python
115 lines
2.7 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2017-2020 The Project X-Ray Authors.
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#
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# Use of this source code is governed by a ISC-style
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# license that can be found in the LICENSE file or at
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# https://opensource.org/licenses/ISC
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#
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# SPDX-License-Identifier: ISC
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import os
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import itertools
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import re
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import random
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random.seed(int(os.getenv("SEED"), 16))
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from prjxray import util
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from prjxray.db import Database
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XY_RE = re.compile('^BUFHCE_X([0-9]+)Y([0-9]+)$')
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BUFGCTRL_XY_RE = re.compile('^BUFGCTRL_X([0-9]+)Y([0-9]+)$')
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"""
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BUFHCE's can be driven from:
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MMCME2_ADV
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BUFHCE
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PLLE2_ADV
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BUFGCTRL
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"""
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def get_xy(s):
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m = BUFGCTRL_XY_RE.match(s)
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x = int(m.group(1))
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y = int(m.group(2))
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return x, y
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def gen_sites(desired_site_type):
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db = Database(util.get_db_root(), util.get_part())
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grid = db.grid()
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for tile_name in sorted(grid.tiles()):
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loc = grid.loc_of_tilename(tile_name)
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gridinfo = grid.gridinfo_at_loc(loc)
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for site, site_type in gridinfo.sites.items():
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if site_type == desired_site_type:
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yield site
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def gen_bufhce_sites():
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db = Database(util.get_db_root(), util.get_part())
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grid = db.grid()
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for tile_name in sorted(grid.tiles()):
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loc = grid.loc_of_tilename(tile_name)
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gridinfo = grid.gridinfo_at_loc(loc)
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sites = []
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for site, site_type in gridinfo.sites.items():
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if site_type == 'BUFHCE':
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sites.append(site)
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if sites:
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yield tile_name, set(sites)
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def main():
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print('''
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module top();
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''')
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gclks = []
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for site in sorted(gen_sites("BUFGCTRL"), key=get_xy):
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wire_name = 'clk_{}'.format(site)
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gclks.append(wire_name)
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print(
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"""
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wire {wire_name};
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(* KEEP, DONT_TOUCH, LOC = "{site}" *)
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BUFG bufg_{site} (
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.O({wire_name})
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);
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""".format(
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site=site,
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wire_name=wire_name,
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))
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bufhce_sites = list(gen_bufhce_sites())
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opts = []
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for count in range(len(bufhce_sites)):
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for opt in itertools.combinations(bufhce_sites, count + 1):
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opts.append(opt)
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for gclk in gclks:
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for tile_name, sites in random.choice(opts):
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for site in sorted(sites):
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print(
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"""
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(* KEEP, DONT_TOUCH, LOC = "{site}" *)
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BUFHCE buf_{site} (
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.I({wire_name})
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);""".format(
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site=site,
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wire_name=gclk,
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))
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sites.remove(site)
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break
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print("endmodule")
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if __name__ == '__main__':
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main()
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