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merged changes in axis

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This commit is contained in:
Alex Forencich 2020-07-10 14:04:52 -07:00
commit 65cb3cb441
3 changed files with 80 additions and 1 deletions
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2
lib/axis/rtl/axis_ram_switch.v
View File

@ -922,7 +922,7 @@ generate
end
// process commands and issue memory reads
if (cmd_valid_reg && (!ram_rd_en_reg || ram_rd_ack) && ($unsigned(out_fifo_ctrl_wr_ptr_reg - out_fifo_rd_ptr_reg) < 32)) begin
if (cmd_valid_reg && !cmd_status_valid_next && (!ram_rd_en_reg || ram_rd_ack) && ($unsigned(out_fifo_ctrl_wr_ptr_reg - out_fifo_rd_ptr_reg) < 32)) begin
// update counters
rd_ptr_next[ADDR_WIDTH-1:0] = rd_ptr_reg[ADDR_WIDTH-1:0] + 1;
len_next = len_reg - 1;

51
lib/axis/syn/axis_async_fifo.sdc Normal file
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@ -0,0 +1,51 @@
# Copyright (c) 2020 Alex Forencich
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
# AXI stream asynchronous FIFO timing constraints
proc constrain_axis_async_fifo_inst { inst } {
puts "Inserting timing constraints for axis_async_fifo instance $inst"
# reset synchronization
set_false_path -from * -to [get_registers "$inst|s_rst_sync*_reg $inst|m_rst_sync*_reg"]
if {[get_collection_size [get_registers -nowarn "$inst|s_rst_sync2_reg"]]} {
set_max_delay -from [get_registers "$inst|s_rst_sync2_reg"] -to [get_registers "$inst|s_rst_sync3_reg"] 8.000
}
if {[get_collection_size [get_registers -nowarn "$inst|m_rst_sync2_reg"]]} {
set_max_delay -from [get_registers "$inst|m_rst_sync2_reg"] -to [get_registers "$inst|m_rst_sync3_reg"] 8.000
}
# pointer synchronization
set_max_delay -from [get_registers "$inst|rd_ptr_reg[*] $inst|rd_ptr_gray_reg[*]"] -to [get_registers "$inst|rd_ptr_gray_sync1_reg[*]"] 8.000
set_max_delay -from [get_registers "$inst|wr_ptr_reg[*] $inst|wr_ptr_gray_reg[*] $inst|wr_ptr_sync_gray_reg[*]"] -to [get_registers "$inst|wr_ptr_gray_sync1_reg[*]"] 8.000
# frame FIFO pointer update synchronization
set_max_delay -from [get_registers "$inst|wr_ptr_update_reg"] -to [get_registers "$inst|wr_ptr_update_sync1_reg"] 8.000
set_max_delay -from [get_registers "$inst|wr_ptr_update_sync3_reg"] -to [get_registers "$inst|wr_ptr_update_ack_sync1_reg"] 8.000
# status synchronization
foreach i {overflow bad_frame good_frame} {
if {[get_collection_size [get_registers -nowarn "$inst|${i}_sync*_reg"]]} {
set_max_delay -from [get_registers "$inst|${i}_sync1_reg"] -to [get_registers "$inst|${i}_sync2_reg"] 8.000
}
}
}

28
lib/axis/syn/sync_reset.sdc Normal file
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@ -0,0 +1,28 @@
# Copyright (c) 2020 Alex Forencich
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
# reset synchronizer timing constraints
proc constrain_sync_reset_inst { inst } {
puts "Inserting timing constraints for sync_reset instance $inst"
# reset synchronization
set_false_path -from * -to [get_registers "$inst|sync_reg[*]"]
}