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axis: Use reset synchronizer module in AXI stream async FIFO

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
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Alex Forencich
2025-02-20 12:44:23 -08:00
parent 17f3613ca4
commit 6154506c0a
6 changed files with 31 additions and 80 deletions
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31
syn/vivado/taxi_axis_async_fifo.tcl
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@@ -20,37 +20,6 @@ foreach fifo_inst [get_cells -hier -filter {(ORIG_REF_NAME == taxi_axis_async_fi
set min_clk_period [expr min($write_clk_period, $read_clk_period)]
# reset synchronization
set reset_ffs [get_cells -quiet -hier -regexp ".*/s_rst_sync\[23\]_reg_reg" -filter "PARENT == $fifo_inst"]
if {[llength $reset_ffs]} {
set_property ASYNC_REG TRUE $reset_ffs
# hunt down source
set dest [get_cells $fifo_inst/s_rst_sync2_reg_reg]
set dest_pins [get_pins -of_objects $dest -filter {REF_PIN_NAME == D}]
set net [get_nets -segments -of_objects $dest_pins]
set source_pins [get_pins -of_objects $net -filter {IS_LEAF && DIRECTION == OUT}]
set source [get_cells -of_objects $source_pins]
set_max_delay -from $source -to $dest -datapath_only $read_clk_period
}
set reset_ffs [get_cells -quiet -hier -regexp ".*/m_rst_sync\[23\]_reg_reg" -filter "PARENT == $fifo_inst"]
if {[llength $reset_ffs]} {
set_property ASYNC_REG TRUE $reset_ffs
# hunt down source
set dest [get_cells $fifo_inst/m_rst_sync2_reg_reg]
set dest_pins [get_pins -of_objects $dest -filter {REF_PIN_NAME == D}]
set net [get_nets -segments -of_objects $dest_pins]
set source_pins [get_pins -of_objects $net -filter {IS_LEAF && DIRECTION == OUT}]
set source [get_cells -of_objects $source_pins]
set_max_delay -from $source -to $dest -datapath_only $write_clk_period
}
# pointer synchronization
set sync_ffs [get_cells -quiet -hier -regexp ".*/rd_ptr_gray_sync\[12\]_reg_reg\\\[\\d+\\\]" -filter "PARENT == $fifo_inst"]