#!/usr/bin/env python """ip_arb_mux_64 Generates an arbitrated IP mux with the specified number of ports Usage: ip_arb_mux_64 [OPTION]... -?, --help display this help and exit -p, --ports specify number of ports -n, --name specify module name -o, --output specify output file name """ import io import sys import getopt from math import * from jinja2 import Template class Usage(Exception): def __init__(self, msg): self.msg = msg def main(argv=None): if argv is None: argv = sys.argv try: try: opts, args = getopt.getopt(argv[1:], "?n:p:o:", ["help", "name=", "ports=", "output="]) except getopt.error as msg: raise Usage(msg) # more code, unchanged except Usage as err: print(err.msg, file=sys.stderr) print("for help use --help", file=sys.stderr) return 2 ports = 4 name = None out_name = None # process options for o, a in opts: if o in ('-?', '--help'): print(__doc__) sys.exit(0) if o in ('-p', '--ports'): ports = int(a) if o in ('-n', '--name'): name = a if o in ('-o', '--output'): out_name = a if name is None: name = "ip_arb_mux_64_{0}".format(ports) if out_name is None: out_name = name + ".v" print("Opening file '%s'..." % out_name) try: out_file = open(out_name, 'w') except Exception as ex: print("Error opening \"%s\": %s" %(out_name, ex.strerror), file=sys.stderr) exit(1) print("Generating {0} port AXI Stream arbitrated mux {1}...".format(ports, name)) select_width = ceil(log2(ports)) t = Template(u"""/* Copyright (c) 2014 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. */ // Language: Verilog 2001 `timescale 1ns / 1ps /* * IP {{n}} port arbitrated multiplexer (64 bit datapath) */ module {{name}} # ( // arbitration type: "PRIORITY" or "ROUND_ROBIN" parameter ARB_TYPE = "PRIORITY", // LSB priority: "LOW", "HIGH" parameter LSB_PRIORITY = "HIGH" ) ( input wire clk, input wire rst, /* * IP frame inputs */ {%- for p in ports %} input wire input_{{p}}_ip_hdr_valid, output wire input_{{p}}_ip_hdr_ready, input wire [47:0] input_{{p}}_eth_dest_mac, input wire [47:0] input_{{p}}_eth_src_mac, input wire [15:0] input_{{p}}_eth_type, input wire [3:0] input_{{p}}_ip_version, input wire [3:0] input_{{p}}_ip_ihl, input wire [5:0] input_{{p}}_ip_dscp, input wire [1:0] input_{{p}}_ip_ecn, input wire [15:0] input_{{p}}_ip_length, input wire [15:0] input_{{p}}_ip_identification, input wire [2:0] input_{{p}}_ip_flags, input wire [12:0] input_{{p}}_ip_fragment_offset, input wire [7:0] input_{{p}}_ip_ttl, input wire [7:0] input_{{p}}_ip_protocol, input wire [15:0] input_{{p}}_ip_header_checksum, input wire [31:0] input_{{p}}_ip_source_ip, input wire [31:0] input_{{p}}_ip_dest_ip, input wire [63:0] input_{{p}}_ip_payload_tdata, input wire [7:0] input_{{p}}_ip_payload_tkeep, input wire input_{{p}}_ip_payload_tvalid, output wire input_{{p}}_ip_payload_tready, input wire input_{{p}}_ip_payload_tlast, input wire input_{{p}}_ip_payload_tuser, {% endfor %} /* * IP frame output */ output wire output_ip_hdr_valid, input wire output_ip_hdr_ready, output wire [47:0] output_eth_dest_mac, output wire [47:0] output_eth_src_mac, output wire [15:0] output_eth_type, output wire [3:0] output_ip_version, output wire [3:0] output_ip_ihl, output wire [5:0] output_ip_dscp, output wire [1:0] output_ip_ecn, output wire [15:0] output_ip_length, output wire [15:0] output_ip_identification, output wire [2:0] output_ip_flags, output wire [12:0] output_ip_fragment_offset, output wire [7:0] output_ip_ttl, output wire [7:0] output_ip_protocol, output wire [15:0] output_ip_header_checksum, output wire [31:0] output_ip_source_ip, output wire [31:0] output_ip_dest_ip, output wire [63:0] output_ip_payload_tdata, output wire [7:0] output_ip_payload_tkeep, output wire output_ip_payload_tvalid, input wire output_ip_payload_tready, output wire output_ip_payload_tlast, output wire output_ip_payload_tuser ); wire [{{n-1}}:0] request; wire [{{n-1}}:0] acknowledge; wire [{{n-1}}:0] grant; wire grant_valid; wire [{{w-1}}:0] grant_encoded; {% for p in ports %} assign acknowledge[{{p}}] = input_{{p}}_ip_payload_tvalid & input_{{p}}_ip_payload_tready & input_{{p}}_ip_payload_tlast; assign request[{{p}}] = input_{{p}}_ip_hdr_valid; {%- endfor %} // mux instance ip_mux_64_{{n}} mux_inst ( .clk(clk), .rst(rst), {%- for p in ports %} .input_{{p}}_ip_hdr_valid(input_{{p}}_ip_hdr_valid & grant[{{p}}]), .input_{{p}}_ip_hdr_ready(input_{{p}}_ip_hdr_ready), .input_{{p}}_eth_dest_mac(input_{{p}}_eth_dest_mac), .input_{{p}}_eth_src_mac(input_{{p}}_eth_src_mac), .input_{{p}}_eth_type(input_{{p}}_eth_type), .input_{{p}}_ip_version(input_{{p}}_ip_version), .input_{{p}}_ip_ihl(input_{{p}}_ip_ihl), .input_{{p}}_ip_dscp(input_{{p}}_ip_dscp), .input_{{p}}_ip_ecn(input_{{p}}_ip_ecn), .input_{{p}}_ip_length(input_{{p}}_ip_length), .input_{{p}}_ip_identification(input_{{p}}_ip_identification), .input_{{p}}_ip_flags(input_{{p}}_ip_flags), .input_{{p}}_ip_fragment_offset(input_{{p}}_ip_fragment_offset), .input_{{p}}_ip_ttl(input_{{p}}_ip_ttl), .input_{{p}}_ip_protocol(input_{{p}}_ip_protocol), .input_{{p}}_ip_header_checksum(input_{{p}}_ip_header_checksum), .input_{{p}}_ip_source_ip(input_{{p}}_ip_source_ip), .input_{{p}}_ip_dest_ip(input_{{p}}_ip_dest_ip), .input_{{p}}_ip_payload_tdata(input_{{p}}_ip_payload_tdata), .input_{{p}}_ip_payload_tkeep(input_{{p}}_ip_payload_tkeep), .input_{{p}}_ip_payload_tvalid(input_{{p}}_ip_payload_tvalid & grant[{{p}}]), .input_{{p}}_ip_payload_tready(input_{{p}}_ip_payload_tready), .input_{{p}}_ip_payload_tlast(input_{{p}}_ip_payload_tlast), .input_{{p}}_ip_payload_tuser(input_{{p}}_ip_payload_tuser), {%- endfor %} .output_ip_hdr_valid(output_ip_hdr_valid), .output_ip_hdr_ready(output_ip_hdr_ready), .output_eth_dest_mac(output_eth_dest_mac), .output_eth_src_mac(output_eth_src_mac), .output_eth_type(output_eth_type), .output_ip_version(output_ip_version), .output_ip_ihl(output_ip_ihl), .output_ip_dscp(output_ip_dscp), .output_ip_ecn(output_ip_ecn), .output_ip_length(output_ip_length), .output_ip_identification(output_ip_identification), .output_ip_flags(output_ip_flags), .output_ip_fragment_offset(output_ip_fragment_offset), .output_ip_ttl(output_ip_ttl), .output_ip_protocol(output_ip_protocol), .output_ip_header_checksum(output_ip_header_checksum), .output_ip_source_ip(output_ip_source_ip), .output_ip_dest_ip(output_ip_dest_ip), .output_ip_payload_tdata(output_ip_payload_tdata), .output_ip_payload_tkeep(output_ip_payload_tkeep), .output_ip_payload_tvalid(output_ip_payload_tvalid), .output_ip_payload_tready(output_ip_payload_tready), .output_ip_payload_tlast(output_ip_payload_tlast), .output_ip_payload_tuser(output_ip_payload_tuser), .enable(grant_valid), .select(grant_encoded) ); // arbiter instance arbiter #( .PORTS({{n}}), .TYPE(ARB_TYPE), .BLOCK("ACKNOWLEDGE"), .LSB_PRIORITY(LSB_PRIORITY) ) arb_inst ( .clk(clk), .rst(rst), .request(request), .acknowledge(acknowledge), .grant(grant), .grant_valid(grant_valid), .grant_encoded(grant_encoded) ); endmodule """) out_file.write(t.render( n=ports, w=select_width, name=name, ports=range(ports) )) print("Done") if __name__ == "__main__": sys.exit(main())