| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: niu_ipp_sum_unit.v |
| 4 | // Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved |
| 5 | // 4150 Network Circle, Santa Clara, California 95054, U.S.A. |
| 6 | // |
| 7 | // * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 8 | // |
| 9 | // This program is free software; you can redistribute it and/or modify |
| 10 | // it under the terms of the GNU General Public License as published by |
| 11 | // the Free Software Foundation; version 2 of the License. |
| 12 | // |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | // |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | // |
| 22 | // For the avoidance of doubt, and except that if any non-GPL license |
| 23 | // choice is available it will apply instead, Sun elects to use only |
| 24 | // the General Public License version 2 (GPLv2) at this time for any |
| 25 | // software where a choice of GPL license versions is made |
| 26 | // available with the language indicating that GPLv2 or any later version |
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| 29 | // |
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| 31 | // CA 95054 USA or visit www.sun.com if you need additional information or |
| 32 | // have any questions. |
| 33 | // |
| 34 | // ========== Copyright Header End ============================================ |
| 35 | |
| 36 | `timescale 1ns/10ps |
| 37 | |
| 38 | /********************************************************** |
| 39 | *********************************************************** |
| 40 | |
| 41 | Project : Niu |
| 42 | |
| 43 | File name : niu_ipp_sum_unit.v |
| 44 | |
| 45 | Module(s) name : niu_ipp_sum_unit |
| 46 | Original: : sum_unit.v main.5, label: |
| 47 | |
| 48 | Parent modules : niu_ipp_sum.v |
| 49 | |
| 50 | Child modules : niu_ipp_sum_lib.v, niu_ipp_sum.h, |
| 51 | niu_ipp_sum_data.v, niu_ipp_sum_ctrl.v. |
| 52 | |
| 53 | Author's name : George Chu |
| 54 | |
| 55 | Date : March. 2004 |
| 56 | |
| 57 | Description : One unit of the ipp checksum. |
| 58 | |
| 59 | Synthesis Notes: |
| 60 | |
| 61 | Modification History: |
| 62 | |
| 63 | Date Description |
| 64 | ---- ----------- |
| 65 | |
| 66 | ************************************************************ |
| 67 | ***********************************************************/ |
| 68 | |
| 69 | module niu_ipp_sum_unit (ipp_din_dat, port_num, ipp_full_cksum, |
| 70 | ipp_la4_prot, ipp_la3_vers, ipp_la2_opti, ip4_hdr_leng, |
| 71 | ipp_info_valid, ipp_start_tcp, ipp_pkt_end, ipp_max_bytes, |
| 72 | reset, clk, |
| 73 | sum_prt_started, sum_prt_valid, |
| 74 | sum_prt_fail, sum_prt_cksum, sum_prt_length, |
| 75 | sum_prt_state); |
| 76 | |
| 77 | input [127:0] ipp_din_dat; // pkt data |
| 78 | input port_num; // if 1, this sum_unit is enabled |
| 79 | input ipp_full_cksum; // if 1, do the full check_sum |
| 80 | input [1:0] ipp_la4_prot; // layer_4, protocol, 0:not_interested,1:Tcp,2:Udp,3:SCTP |
| 81 | input [1:0] ipp_la3_vers; // layer_3, version, 0:not_interested,1:Ip4,2:Ip6,3:reser |
| 82 | input [1:0] ipp_la2_opti; // layer_2, options {LLC,VLAN} |
| 83 | input [3:0] ip4_hdr_leng; // layer_3, IPv4 header_length |
| 84 | input ipp_info_valid; // pkt data valid |
| 85 | input ipp_start_tcp; // start a tcp checksum |
| 86 | input ipp_pkt_end; // end of the pkt data |
| 87 | input [16:0] ipp_max_bytes; // pio program: maximum bytes for a pkt to pass checksum |
| 88 | input reset; |
| 89 | input clk; |
| 90 | output sum_prt_started; // the sum_unit is busy, processing a pkt |
| 91 | output sum_prt_valid; // the following checksum outputs are valid |
| 92 | output sum_prt_fail; // the checked result is a failure |
| 93 | output [15:0] sum_prt_cksum; // the check sum |
| 94 | output [15:0] sum_prt_length; // the IPv4,6's IP length field |
| 95 | output [31:0] sum_prt_state; // the states of the checksum_unit |
| 96 | |
| 97 | wire sum_prt_started; |
| 98 | wire sum_prt_valid; |
| 99 | wire sum_prt_fail; |
| 100 | wire [15:0] sum_prt_cksum; |
| 101 | wire [15:0] sum_prt_length; |
| 102 | wire [31:0] sum_prt_state; |
| 103 | |
| 104 | /* ---------- sum data -------- */ |
| 105 | wire c_dsum_fail; |
| 106 | wire [15:0] tcp_prt_cksum; |
| 107 | |
| 108 | /* ---------- sum ctrl -------- */ |
| 109 | wire clr; |
| 110 | wire [3:0] hdr_off; |
| 111 | wire [1:0] sel_awd; |
| 112 | wire [7:0] sel_asw; |
| 113 | wire [7:0] sel_bwd; |
| 114 | wire sel_add; |
| 115 | wire [15:0] byt_ena; |
| 116 | wire [15:0] udp_dat_len_r; |
| 117 | wire get_uln; |
| 118 | wire add_uln; |
| 119 | |
| 120 | wire tcp_prt_fail; |
| 121 | wire [15:0] tcp_prt_length; |
| 122 | wire [31:0] tcp_prt_state; |
| 123 | |
| 124 | wire [127:0] din_wrd; |
| 125 | wire [127:0] din_wrd_d; |
| 126 | |
| 127 | wire ipp_start = ipp_start_tcp; |
| 128 | wire ipp_start_d; |
| 129 | wire clr_prt = ipp_start && !ipp_start_d || reset; |
| 130 | wire clr_sum; |
| 131 | |
| 132 | wire sum_prt_fail_d; |
| 133 | wire [15:0] sum_prt_cksum_d; |
| 134 | wire [15:0] sum_prt_length_d; |
| 135 | |
| 136 | //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 137 | |
| 138 | assign sum_prt_fail = sum_prt_valid ? tcp_prt_fail : sum_prt_fail_d; |
| 139 | assign sum_prt_cksum = sum_prt_valid ? tcp_prt_cksum[15:0] : sum_prt_cksum_d[15:0]; |
| 140 | assign sum_prt_length = sum_prt_valid ? tcp_prt_length[15:0] : sum_prt_length_d[15:0]; |
| 141 | |
| 142 | niu_ipp_sum_data sum_data ( |
| 143 | .din_wrd (din_wrd_d[127:0]), |
| 144 | .hdr_off (hdr_off[3:0]), |
| 145 | .byt_ena (byt_ena[15:0]), |
| 146 | .sel_awd (sel_awd[1:0]), |
| 147 | .sel_asw7 (sel_asw[7]), |
| 148 | .sel_asw6 (sel_asw[6]), |
| 149 | .sel_asw5 (sel_asw[5]), |
| 150 | .sel_asw3 (sel_asw[3]), |
| 151 | .sel_asw2 (sel_asw[2]), |
| 152 | .sel_asw1 (sel_asw[1]), |
| 153 | .sel_bwd7 (sel_bwd[7]), |
| 154 | .sel_bwd5 (sel_bwd[5]), |
| 155 | .sel_bwd4 (sel_bwd[4]), |
| 156 | .sel_bwd3 (sel_bwd[3]), |
| 157 | .sel_bwd1 (sel_bwd[1]), |
| 158 | .sel_add (sel_add), |
| 159 | .inp_uln (udp_dat_len_r[15:0]), |
| 160 | .get_uln (get_uln), |
| 161 | .add_uln (add_uln), |
| 162 | .clr (clr_sum), |
| 163 | .clk (clk), |
| 164 | .sum_prt_cksum (tcp_prt_cksum[15:0]), |
| 165 | .c_dsum_fail (c_dsum_fail) |
| 166 | ); |
| 167 | |
| 168 | niu_ipp_sum_ctrl sum_ctrl ( |
| 169 | .din_wrd (din_wrd[127:0]), |
| 170 | .port_num (port_num), |
| 171 | .ipp_full_cksum (ipp_full_cksum), |
| 172 | .ipp_la4_prot (ipp_la4_prot[1:0]), |
| 173 | .ipp_la3_vers (ipp_la3_vers[1:0]), |
| 174 | .ipp_la2_opti (ipp_la2_opti[1:0]), |
| 175 | .ip4_hdr_leng (ip4_hdr_leng[3:0]), |
| 176 | .ipp_info_valid (ipp_info_valid), |
| 177 | .ipp_start_cksum (ipp_start_tcp), |
| 178 | .ipp_pkt_end (ipp_pkt_end), |
| 179 | .ipp_max_bytes (ipp_max_bytes[16:0]), |
| 180 | .c_dsum_fail (c_dsum_fail), |
| 181 | .reset (reset), |
| 182 | .clk (clk), |
| 183 | .clr (clr), |
| 184 | .hdr_off (hdr_off[3:0]), |
| 185 | .sel_awd (sel_awd[1:0]), |
| 186 | .sel_asw (sel_asw[7:0]), |
| 187 | .sel_bwd (sel_bwd[7:0]), |
| 188 | .sel_add (sel_add), |
| 189 | .byt_ena (byt_ena[15:0]), |
| 190 | .udp_dat_len_r (udp_dat_len_r[15:0]), |
| 191 | .get_uln (get_uln), |
| 192 | .add_uln (add_uln), |
| 193 | .sum_prt_started (sum_prt_started), |
| 194 | .sum_prt_valid (sum_prt_valid), |
| 195 | .sum_prt_fail (tcp_prt_fail), |
| 196 | .sum_prt_length (tcp_prt_length[15:0]), |
| 197 | .sum_prt_state (tcp_prt_state[31:0]) |
| 198 | ); |
| 199 | |
| 200 | assign din_wrd = |
| 201 | {ipp_din_dat[007:000],ipp_din_dat[015:008],ipp_din_dat[023:016],ipp_din_dat[031:024], |
| 202 | ipp_din_dat[039:032],ipp_din_dat[047:040],ipp_din_dat[055:048],ipp_din_dat[063:056], |
| 203 | ipp_din_dat[071:064],ipp_din_dat[079:072],ipp_din_dat[087:080],ipp_din_dat[095:088], |
| 204 | ipp_din_dat[103:096],ipp_din_dat[111:104],ipp_din_dat[119:112],ipp_din_dat[127:120]}; |
| 205 | |
| 206 | ipp_sum_reg_r_1 su_reg_r_1_clr (clr, reset, clk,clr_sum); |
| 207 | ipp_sum_reg_r_1 su_reg_r_1_sta (ipp_start, reset, clk,ipp_start_d); |
| 208 | ipp_sum_reg_r_128 su_reg_r_128_wrd(din_wrd[127:0], reset, clk,din_wrd_d[127:0]); |
| 209 | ipp_sum_reg_r_1 su_reg_r_1_fai (sum_prt_fail, clr_prt,clk,sum_prt_fail_d); |
| 210 | ipp_sum_reg_r_16 su_reg_r_16_sum (sum_prt_cksum[15:0], clr_prt,clk,sum_prt_cksum_d[15:0]); |
| 211 | ipp_sum_reg_r_16 su_reg_r_16_len (sum_prt_length[15:0], clr_prt,clk,sum_prt_length_d[15:0]); |
| 212 | ipp_sum_reg_r_9_s0 su_reg_w_r_9_s0 (tcp_prt_state[08:0], reset, clk,sum_prt_state[08:0]); |
| 213 | ipp_sum_reg_w_r_23 su_reg_w_r_23_st(tcp_prt_state[31:9], sum_prt_started,clr_prt,clk,sum_prt_state[31:9]); |
| 214 | |
| 215 | |
| 216 | endmodule |