mirror of https://github.com/openXC7/prjxray.git
36 lines
1.1 KiB
Python
36 lines
1.1 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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"""
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Add bits that are considered always on to the db file.
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This script is Zynq specific.
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There are three bits that are present in all Zynq bitstreams.
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The investigation that was done to reach this conclusion is captured on GH
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(https://github.com/SymbiFlow/prjxray/issues/746)
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In brief, these bits seem to be bitstream properties related,
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but no evidence of this could be found.
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Due to the fact that the base address of these bits is the same as for the
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CFG_CENTER_MID tile it has been decided to append the bits to its db file.
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"""
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import sys
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constant_bits = {
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"CFG_CENTER_MID.ALWAYS_ON_PROP1": "26_2206",
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"CFG_CENTER_MID.ALWAYS_ON_PROP2": "26_2207",
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"CFG_CENTER_MID.ALWAYS_ON_PROP3": "27_2205"
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}
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with open(sys.argv[1], "a") as f:
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for bit_name, bit_value in constant_bits.items():
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f.write(bit_name + " " + bit_value + "\n")
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