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40 lines
2.1 KiB
Tcl
40 lines
2.1 KiB
Tcl
# Copyright (c) 2019 Alex Forencich
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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# RGMII PHY IF timing constraints
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foreach if_inst [get_cells -hier -filter {(ORIG_REF_NAME == rgmii_phy_if || REF_NAME == rgmii_phy_if)}] {
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puts "Inserting timing constraints for rgmii_phy_if instance $if_inst"
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# reset synchronization
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set reset_ffs [get_cells -hier -regexp ".*/(rx|tx)_rst_reg_reg\\\[\\d\\\]" -filter "PARENT == $if_inst"]
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set_property ASYNC_REG TRUE $reset_ffs
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set_false_path -to [get_pins -of_objects $reset_ffs -filter {IS_PRESET || IS_RESET}]
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# clock output
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set_property ASYNC_REG TRUE [get_cells $if_inst/clk_oddr_inst/oddr[0].oddr_inst]
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set src_clk [get_clocks -of_objects [get_pins $if_inst/rgmii_tx_clk_1_reg/C]]
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set_max_delay -from [get_cells $if_inst/rgmii_tx_clk_1_reg] -to [get_cells $if_inst/clk_oddr_inst/oddr[0].oddr_inst] -datapath_only [expr [get_property -min PERIOD $src_clk]/4]
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set_max_delay -from [get_cells $if_inst/rgmii_tx_clk_2_reg] -to [get_cells $if_inst/clk_oddr_inst/oddr[0].oddr_inst] -datapath_only [expr [get_property -min PERIOD $src_clk]/4]
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}
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