| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: niu_ipp_unload_ctl_1ke.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 |
| 27 | // may be used, or where a choice of which version of the GPL is applied is |
| 28 | // otherwise unspecified. |
| 29 | // |
| 30 | // Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 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 | *********************************************************** |
| 37 | |
| 38 | Project : Niu |
| 39 | |
| 40 | File name : niu_ipp_unload_ctl_1ke.v |
| 41 | |
| 42 | Module(s) name : niu_ipp_unload_ctl_1ke |
| 43 | |
| 44 | Parent modules : niu_ipp.v |
| 45 | |
| 46 | Child modules : niu_ipp.h |
| 47 | |
| 48 | Author's name : George Chu |
| 49 | |
| 50 | Date : Jan. 2004 |
| 51 | |
| 52 | Description : This module contains a Finite State Machine used to |
| 53 | control the ipp_unload interface protocol. |
| 54 | |
| 55 | Synthesis Notes: |
| 56 | |
| 57 | Modification History: |
| 58 | Date Description |
| 59 | ---- ----------- |
| 60 | |
| 61 | ************************************************************ |
| 62 | ***********************************************************/ |
| 63 | |
| 64 | `timescale 1ns/10ps |
| 65 | |
| 66 | `include "niu_ipp.h" |
| 67 | |
| 68 | module niu_ipp_unload_ctl_1ke ( |
| 69 | ipp_ffl_dvalid_n, |
| 70 | cur_pkt_hdr_base_ptr, |
| 71 | cur_pkt_ffl_sum_info, |
| 72 | ipp_hfifo_dat_tag, |
| 73 | ipp_hfifo_dat_empty, |
| 74 | ipp_dfifo_dout_tag, |
| 75 | ipp_dmc_dat_err1, |
| 76 | sum_prt_valid, |
| 77 | dmc_ipp_dat_req, |
| 78 | pio_cksum_ena, |
| 79 | pio_full_cksum, |
| 80 | ipp_enable, |
| 81 | ippfifo_rd_wr_ptr_bypass, |
| 82 | ippfifo_rd_ptr_pio_wr_en, |
| 83 | datfifo_pio_wr_ena, |
| 84 | dfifo_rd_ptr_pio_wr_en, |
| 85 | dfifo_wt_ptr_pio_wr_en, |
| 86 | dfifo_wt_data_reg_wr_en_pls, |
| 87 | ipp_pio_wdata, |
| 88 | |
| 89 | reset, |
| 90 | clk, |
| 91 | |
| 92 | inc_hfifo_dat_rptr, |
| 93 | inc_hfifo_dat_rptr_d, |
| 94 | ipp_hfifo_dat_rptr, |
| 95 | ipp_hfifo_dat_tag_rd, |
| 96 | ipp_dfifo_wptr, |
| 97 | ipp_dfifo_wten, |
| 98 | ipp_dfifo_wten_2nd, |
| 99 | ipp_dfifo_rden, |
| 100 | ipp_dfifo_rptr, |
| 101 | ipp_dfifo_full, |
| 102 | wt_dfifo_1st_wd, |
| 103 | addr_status, |
| 104 | ipp_dmc_dat_ack, |
| 105 | ipp_dmc_ful_pkt, |
| 106 | ipp_full_cksum, |
| 107 | ipp_start_tcp, |
| 108 | ipp_sum_info_vld, |
| 109 | req_rd_dfifo_eop, |
| 110 | req_rd_dfifo_sop, |
| 111 | ipp_la2_opti, |
| 112 | ipp_la3_vers, |
| 113 | ip4_hdr_leng, |
| 114 | ipp_la4_prot, |
| 115 | clr_ipp_unload, |
| 116 | n_ipp_unload_idle, |
| 117 | fet_pio_tcp_ena, |
| 118 | dfifo_miss_eop, |
| 119 | dfifo_miss_sop, |
| 120 | c_unload_st |
| 121 | ); |
| 122 | |
| 123 | input ipp_ffl_dvalid_n; |
| 124 | input [6:0] cur_pkt_hdr_base_ptr; |
| 125 | input [9:0] cur_pkt_ffl_sum_info; |
| 126 | input [1:0] ipp_hfifo_dat_tag; |
| 127 | input ipp_hfifo_dat_empty; |
| 128 | input [1:0] ipp_dfifo_dout_tag; |
| 129 | input ipp_dmc_dat_err1; |
| 130 | input sum_prt_valid; |
| 131 | input dmc_ipp_dat_req; |
| 132 | input pio_cksum_ena; |
| 133 | input pio_full_cksum; |
| 134 | input ipp_enable; |
| 135 | input ippfifo_rd_wr_ptr_bypass; |
| 136 | input ippfifo_rd_ptr_pio_wr_en; |
| 137 | input datfifo_pio_wr_ena; |
| 138 | input dfifo_rd_ptr_pio_wr_en; |
| 139 | input dfifo_wt_ptr_pio_wr_en; |
| 140 | input dfifo_wt_data_reg_wr_en_pls; |
| 141 | input [10:0] ipp_pio_wdata; |
| 142 | |
| 143 | input reset; |
| 144 | input clk; |
| 145 | |
| 146 | output inc_hfifo_dat_rptr; |
| 147 | output inc_hfifo_dat_rptr_d; |
| 148 | output [6:0] ipp_hfifo_dat_rptr; |
| 149 | output [1:0] ipp_hfifo_dat_tag_rd; |
| 150 | output [10:0] ipp_dfifo_wptr; // addr[9:0] of 16k-byte data, 1k entries, + 1_wrap |
| 151 | output ipp_dfifo_wten; |
| 152 | output ipp_dfifo_wten_2nd; |
| 153 | output ipp_dfifo_rden; |
| 154 | output [10:0] ipp_dfifo_rptr; // addr[9:0] of 16k-byte data, 1k entries, + 1_wrap |
| 155 | output ipp_dfifo_full; |
| 156 | output wt_dfifo_1st_wd; |
| 157 | output [11:0] addr_status; |
| 158 | output ipp_dmc_dat_ack; |
| 159 | output ipp_dmc_ful_pkt; |
| 160 | output ipp_full_cksum; |
| 161 | output ipp_start_tcp; |
| 162 | output ipp_sum_info_vld; |
| 163 | output req_rd_dfifo_eop; |
| 164 | output req_rd_dfifo_sop; |
| 165 | output [1:0] ipp_la2_opti; |
| 166 | output [1:0] ipp_la3_vers; |
| 167 | output [3:0] ip4_hdr_leng; |
| 168 | output [1:0] ipp_la4_prot; |
| 169 | |
| 170 | output clr_ipp_unload; |
| 171 | output n_ipp_unload_idle; |
| 172 | output fet_pio_tcp_ena; |
| 173 | output dfifo_miss_eop; |
| 174 | output dfifo_miss_sop; |
| 175 | output [4:0] c_unload_st; |
| 176 | |
| 177 | reg inc_hfifo_dat_rptr; |
| 178 | reg inc_hfifo_dat_rptr_d; |
| 179 | wire [6:0] ipp_hfifo_dat_rptr; |
| 180 | wire [1:0] ipp_hfifo_dat_tag_rd; |
| 181 | wire [10:0] ipp_dfifo_wptr; // addr[9:0] of 16k-byte data, 1k entries, + 1_wrap |
| 182 | wire ipp_dfifo_wten; |
| 183 | reg ipp_dfifo_wten_2nd; |
| 184 | reg ipp_dfifo_wten_pkt; |
| 185 | wire ipp_dfifo_full; |
| 186 | reg wt_dfifo_1st_wd, wt_dfifo_1st_wd_d, wt_dfifo_1st_wd_d2; |
| 187 | reg [11:0] addr_status; |
| 188 | wire ipp_dmc_dat_ack, ipp_dmc_dat_ack_0, ipp_dmc_dat_ack_1, ipp_dmc_dat_ack_2; |
| 189 | wire ipp_dmc_ful_pkt, ipp_dmc_ful_pkt_1, ipp_dmc_ful_pkt_2, n_ipp_dmc_ful_pkt_2; |
| 190 | wire ipp_dmc_dat_emp_0; |
| 191 | wire ipp_full_cksum; |
| 192 | reg ipp_start_tcp; |
| 193 | wire ipp_sum_info_vld; |
| 194 | wire req_rd_dfifo_eop; |
| 195 | wire req_rd_dfifo_sop; |
| 196 | wire [1:0] ipp_la2_opti = cur_pkt_ffl_sum_info[1:0]; |
| 197 | wire [1:0] ipp_la3_vers = cur_pkt_ffl_sum_info[3:2]; |
| 198 | wire [3:0] ip4_hdr_leng = cur_pkt_ffl_sum_info[7:4]; |
| 199 | wire [1:0] ipp_la4_prot = cur_pkt_ffl_sum_info[9:8]; |
| 200 | |
| 201 | reg clr_ipp_unload; |
| 202 | wire n_ipp_unload_idle; |
| 203 | wire fet_pio_tcp_ena; |
| 204 | reg dfifo_miss_eop, n_dfifo_miss_eop; |
| 205 | reg dfifo_miss_sop, n_dfifo_miss_sop; |
| 206 | reg [4:0] c_unload_st; |
| 207 | |
| 208 | reg [4:0] n_unload_st; |
| 209 | |
| 210 | reg ipp_ffl_dvalid_n_d; |
| 211 | wire start_unload_n = !ipp_ffl_dvalid_n && ipp_ffl_dvalid_n_d; |
| 212 | reg start_unload; |
| 213 | |
| 214 | reg ipp_cksum_done_r; |
| 215 | wire n_ipp_cksum_done; |
| 216 | wire ipp_cksum_done; |
| 217 | |
| 218 | reg lod_hfifo_base_rptr; |
| 219 | |
| 220 | wire [6:0] n_hfifo_dat_rptr; |
| 221 | reg [6:0] hfifo_dat_rptr; |
| 222 | |
| 223 | wire [11:0] n_addr_status; |
| 224 | |
| 225 | reg lod_dfifo_base_wptr; |
| 226 | reg inc_ipp_dfifo_wptr; |
| 227 | reg [10:0] ipp_dfifo_wptr_r; |
| 228 | wire [10:0] n_addr_wt_pkt, n_addr_packet; |
| 229 | reg [10:0] addr_wt_pkt, addr_packet; |
| 230 | |
| 231 | wire ipp_dfifo_rden; |
| 232 | wire [10:0] n_ipp_dfifo_rptr; // addr[9:0] of 16k-byte data, 1k entries, + 1_wrap |
| 233 | reg [10:0] ipp_dfifo_rptr; // addr[9:0] of 16k-byte data, 1k entries, + 1_wrap |
| 234 | wire [10:0] dfifo_free_space; |
| 235 | wire ipp_dfifo_amsful; |
| 236 | |
| 237 | wire ipp_dfifo_empty; |
| 238 | |
| 239 | wire n_ipp_dmc_dat_ack; |
| 240 | |
| 241 | wire ipp_dfifo_dout_eop = ipp_dfifo_dout_tag[1]; |
| 242 | wire ipp_dfifo_dout_sop = ipp_dfifo_dout_tag[0]; |
| 243 | reg ipp_dfifo_dout_eop_d; |
| 244 | wire req_rd_dfifo_eop_d1, req_rd_dfifo_eop_d2; |
| 245 | wire req_rd_dfifo_eops; |
| 246 | |
| 247 | reg [8:0] n_dfifo_pkt_count; // 1k entries, up to 16k-bytes |
| 248 | reg [8:0] dfifo_pkt_count; // 1k entries, up to 16k-bytes |
| 249 | wire n_ipp_dmc_ful_pkt; |
| 250 | |
| 251 | reg n_clr_ipp_unload; |
| 252 | |
| 253 | wire req_rd_dfifo_sop_d; |
| 254 | wire req_rd_dfifo_sop_rise = req_rd_dfifo_sop && !req_rd_dfifo_sop_d; |
| 255 | wire req_rd_dfifo_sop_rise_d; |
| 256 | |
| 257 | reg n_fet_pio_tcp_ena; |
| 258 | wire no_cksum; |
| 259 | |
| 260 | wire ecc_err_force, ecc_err_force_d; |
| 261 | |
| 262 | wire [1:0] hfifo_dat_tag_rd; |
| 263 | wire [1:0] n_hfifo_dat_tag_rd; |
| 264 | reg [1:0] hfifo_dat_tag_rd_d; |
| 265 | |
| 266 | reg n_bad_tag_mac_sta, bad_tag_mac_sta; |
| 267 | |
| 268 | reg [1:0] c_dfifo_tag_st, n_dfifo_tag_st; |
| 269 | |
| 270 | // ============================================================================= |
| 271 | /* These checkers check for the transition of the state variable. */ |
| 272 | |
| 273 | /* c_unload_st can transition from `IPP_UNLOAD_IDLE to `IPP_DFIFO_XFR_1ST */ |
| 274 | /* 0in state_transition -var c_unload_st -val `IPP_UNLOAD_IDLE -next `IPP_DFIFO_XFR_1ST */ |
| 275 | |
| 276 | /* c_unload_st can transition from `IPP_DFIFO_XFR_1ST to `IPP_DFIFO_XFR_DAT */ |
| 277 | /* 0in state_transition -var c_unload_st -val `IPP_DFIFO_XFR_1ST -next `IPP_DFIFO_XFR_DAT */ |
| 278 | |
| 279 | /* c_unload_st can transition from `IPP_DFIFO_XFR_DAT to `IPP_BKWT_1ST_WORD, \ |
| 280 | `IPP_WAIT_HFIFO_STA, \ |
| 281 | `IPP_GET_MAC_STAT, \ |
| 282 | `IPP_WAIT_HFIFO_DAT */ |
| 283 | /* 0in state_transition -var c_unload_st -val `IPP_DFIFO_XFR_DAT -next `IPP_BKWT_1ST_WORD |
| 284 | `IPP_WAIT_HFIFO_STA |
| 285 | `IPP_GET_MAC_STAT |
| 286 | `IPP_WAIT_HFIFO_DAT */ |
| 287 | |
| 288 | /* c_unload_st can transition from `IPP_GET_MAC_STAT to `IPP_BKWT_1ST_WORD, \ |
| 289 | `IPP_DFIFO_XFR_ERR */ |
| 290 | /* 0in state_transition -var c_unload_st -val `IPP_GET_MAC_STAT -next `IPP_BKWT_1ST_WORD |
| 291 | `IPP_DFIFO_XFR_ERR */ |
| 292 | |
| 293 | // geo: /* c_unload_st can transition from `IPP_WAIT_CKSUM_DON to `IPP_BKWT_1ST_WORD */ |
| 294 | // geo: /* 0in state_transition -var c_unload_st -val `IPP_WAIT_CKSUM_DON -next `IPP_BKWT_1ST_WORD */ |
| 295 | |
| 296 | /* c_unload_st can transition from `IPP_BKWT_1ST_WORD to `IPP_UNLOAD_IDLE */ |
| 297 | /* 0in state_transition -var c_unload_st -val `IPP_BKWT_1ST_WORD -next `IPP_UNLOAD_IDLE |
| 298 | -match_by_cycle */ |
| 299 | |
| 300 | /* c_unload_st can transition from `IPP_WAIT_HFIFO_STA to `IPP_GET_MAC_STAT */ |
| 301 | /* 0in state_transition -var c_unload_st -val `IPP_WAIT_HFIFO_STA -next `IPP_GET_MAC_STAT */ |
| 302 | |
| 303 | /* c_unload_st can transition from `IPP_WAIT_HFIFO_DAT to `IPP_DFIFO_XFR_DAT */ |
| 304 | /* 0in state_transition -var c_unload_st -val `IPP_WAIT_HFIFO_DAT -next `IPP_DFIFO_XFR_DAT */ |
| 305 | |
| 306 | // ----------------------------------------------------------------------------- |
| 307 | always @(start_unload or |
| 308 | ipp_dfifo_full or ipp_hfifo_dat_empty or |
| 309 | inc_hfifo_dat_rptr_d or ipp_hfifo_dat_tag_rd or |
| 310 | pio_cksum_ena or fet_pio_tcp_ena or |
| 311 | ipp_la3_vers or ipp_la4_prot or |
| 312 | ipp_cksum_done or |
| 313 | c_unload_st |
| 314 | ) begin |
| 315 | |
| 316 | lod_hfifo_base_rptr = 1'h0; |
| 317 | inc_hfifo_dat_rptr = 1'h0; |
| 318 | lod_dfifo_base_wptr = 1'h0; |
| 319 | ipp_dfifo_wten_2nd = 1'h0; |
| 320 | ipp_dfifo_wten_pkt = 1'h0; |
| 321 | inc_ipp_dfifo_wptr = 1'h0; |
| 322 | ipp_start_tcp = 1'h0; |
| 323 | |
| 324 | wt_dfifo_1st_wd = 1'h0; |
| 325 | n_clr_ipp_unload = 1'h0; |
| 326 | |
| 327 | n_bad_tag_mac_sta = 1'h0; |
| 328 | |
| 329 | n_unload_st = 5'h0; |
| 330 | |
| 331 | n_fet_pio_tcp_ena = fet_pio_tcp_ena; |
| 332 | |
| 333 | case (c_unload_st) //synopsys parallel_case |
| 334 | /* 0in < case -default */ |
| 335 | |
| 336 | (`IPP_UNLOAD_IDLE): |
| 337 | begin |
| 338 | if (start_unload) begin |
| 339 | n_fet_pio_tcp_ena = pio_cksum_ena; |
| 340 | lod_hfifo_base_rptr = 1'h1; |
| 341 | inc_hfifo_dat_rptr = 1'h1; |
| 342 | lod_dfifo_base_wptr = 1'h1; |
| 343 | n_unload_st = `IPP_DFIFO_XFR_1ST; |
| 344 | end |
| 345 | else begin |
| 346 | n_fet_pio_tcp_ena = 1'h0; |
| 347 | n_unload_st = c_unload_st[4:0]; |
| 348 | end |
| 349 | end |
| 350 | |
| 351 | (`IPP_DFIFO_XFR_1ST): |
| 352 | if (ipp_dfifo_full) |
| 353 | begin |
| 354 | ipp_dfifo_wten_2nd = inc_hfifo_dat_rptr_d; |
| 355 | ipp_dfifo_wten_pkt = inc_hfifo_dat_rptr_d; |
| 356 | ipp_start_tcp = ((ipp_la4_prot==2'h2) || (ipp_la4_prot==2'h1)) && |
| 357 | ((ipp_la3_vers==2'h1) || (ipp_la3_vers==2'h2)) && fet_pio_tcp_ena; |
| 358 | n_unload_st = c_unload_st[4:0]; |
| 359 | end |
| 360 | else |
| 361 | begin |
| 362 | inc_hfifo_dat_rptr = 1'h1; |
| 363 | ipp_dfifo_wten_2nd = inc_hfifo_dat_rptr_d; |
| 364 | ipp_dfifo_wten_pkt = inc_hfifo_dat_rptr_d; |
| 365 | inc_ipp_dfifo_wptr = 1'h1; |
| 366 | ipp_start_tcp = ((ipp_la4_prot==2'h2) || (ipp_la4_prot==2'h1)) && |
| 367 | ((ipp_la3_vers==2'h1) || (ipp_la3_vers==2'h2)) && fet_pio_tcp_ena; |
| 368 | n_unload_st = `IPP_DFIFO_XFR_DAT; |
| 369 | end |
| 370 | |
| 371 | (`IPP_DFIFO_XFR_DAT): |
| 372 | if (ipp_dfifo_full) |
| 373 | begin |
| 374 | ipp_dfifo_wten_pkt = inc_hfifo_dat_rptr_d; |
| 375 | n_unload_st = c_unload_st[4:0]; |
| 376 | end |
| 377 | else |
| 378 | begin |
| 379 | casez (ipp_hfifo_dat_tag_rd) //synopsys parallel_case |
| 380 | /* 0in < case -default */ |
| 381 | (2'b?1): begin |
| 382 | ipp_dfifo_wten_pkt = inc_hfifo_dat_rptr_d; |
| 383 | inc_ipp_dfifo_wptr = 1'h1; |
| 384 | n_unload_st = `IPP_BKWT_1ST_WORD; |
| 385 | end |
| 386 | (2'b10): if (ipp_hfifo_dat_empty) begin |
| 387 | ipp_dfifo_wten_pkt = inc_hfifo_dat_rptr_d; |
| 388 | n_unload_st = `IPP_WAIT_HFIFO_STA; |
| 389 | end |
| 390 | else begin |
| 391 | inc_hfifo_dat_rptr = 1'h1; |
| 392 | ipp_dfifo_wten_pkt = inc_hfifo_dat_rptr_d; |
| 393 | inc_ipp_dfifo_wptr = 1'h1; |
| 394 | n_unload_st = `IPP_GET_MAC_STAT; |
| 395 | end |
| 396 | // (2'b01): begin |
| 397 | // n_unload_st = `IPP_DFIFO_XFR_ERR; |
| 398 | // n_bad_tag_xfr_dat = 1'h1; |
| 399 | // end |
| 400 | (2'b00): if (ipp_hfifo_dat_empty) begin |
| 401 | ipp_dfifo_wten_pkt = inc_hfifo_dat_rptr_d; |
| 402 | n_unload_st = `IPP_WAIT_HFIFO_DAT; |
| 403 | end |
| 404 | else begin |
| 405 | inc_hfifo_dat_rptr = 1'h1; |
| 406 | ipp_dfifo_wten_pkt = inc_hfifo_dat_rptr_d; |
| 407 | inc_ipp_dfifo_wptr = 1'h1; |
| 408 | n_unload_st = c_unload_st[4:0]; |
| 409 | end |
| 410 | default: begin |
| 411 | n_unload_st = `IPP_UNLOAD_IDLE; |
| 412 | end |
| 413 | endcase |
| 414 | end |
| 415 | |
| 416 | (`IPP_GET_MAC_STAT): |
| 417 | if (ipp_hfifo_dat_tag_rd[0]) |
| 418 | begin |
| 419 | n_unload_st = `IPP_BKWT_1ST_WORD; |
| 420 | end |
| 421 | else if (ipp_hfifo_dat_empty) |
| 422 | begin |
| 423 | n_unload_st = c_unload_st[4:0]; // geo: careful, rd_ptr increase?, can it happen? |
| 424 | end |
| 425 | else |
| 426 | begin |
| 427 | n_unload_st = `IPP_DFIFO_XFR_ERR; |
| 428 | n_bad_tag_mac_sta = 1'h1; |
| 429 | end |
| 430 | |
| 431 | //geo (`IPP_WAIT_CKSUM_DON): |
| 432 | //geo if (!ipp_dfifo_full && ipp_cksum_done) |
| 433 | //geo begin |
| 434 | //geo n_wt_dfifo_1st_wd = 1'h1; |
| 435 | //geo n_unload_st = `IPP_BKWT_1ST_WORD; |
| 436 | //geo end |
| 437 | //geo else |
| 438 | //geo begin |
| 439 | //geo n_unload_st = c_unload_st[4:0]; |
| 440 | //geo end |
| 441 | |
| 442 | (`IPP_BKWT_1ST_WORD): |
| 443 | if (!ipp_dfifo_full && ipp_cksum_done) |
| 444 | begin |
| 445 | wt_dfifo_1st_wd = 1'h1; |
| 446 | ipp_dfifo_wten_pkt = 1'h1; |
| 447 | n_clr_ipp_unload = 1'h1; |
| 448 | n_unload_st = `IPP_UNLOAD_IDLE; |
| 449 | end |
| 450 | else |
| 451 | begin |
| 452 | n_unload_st = c_unload_st[4:0]; |
| 453 | end |
| 454 | |
| 455 | (`IPP_WAIT_HFIFO_STA): |
| 456 | if (ipp_hfifo_dat_empty) |
| 457 | begin |
| 458 | n_unload_st = c_unload_st[4:0]; |
| 459 | end |
| 460 | else |
| 461 | begin |
| 462 | inc_hfifo_dat_rptr = 1'h1; |
| 463 | inc_ipp_dfifo_wptr = 1'h1; |
| 464 | n_unload_st = `IPP_GET_MAC_STAT; |
| 465 | end |
| 466 | |
| 467 | (`IPP_WAIT_HFIFO_DAT): |
| 468 | if (ipp_hfifo_dat_empty) |
| 469 | begin |
| 470 | n_unload_st = c_unload_st[4:0]; |
| 471 | end |
| 472 | else |
| 473 | begin |
| 474 | inc_hfifo_dat_rptr = 1'h1; |
| 475 | inc_ipp_dfifo_wptr = 1'h1; |
| 476 | n_unload_st = `IPP_DFIFO_XFR_DAT; |
| 477 | end |
| 478 | |
| 479 | (`IPP_DFIFO_XFR_ERR): |
| 480 | begin |
| 481 | // inc_ipp_dfifo_wptr = 1'h1; // geo: how to handle it |
| 482 | // n_unload_st = `IPP_UNLOAD_IDLE; |
| 483 | n_unload_st = c_unload_st[4:0]; |
| 484 | // synopsys translate_off |
| 485 | $display ("Warning @sim_time=%d, data_fifo missed mac_status_tag bad_tag_mac_sta=%h, hang in DFIFO_XFR_ERR!\n", |
| 486 | $stime, bad_tag_mac_sta); |
| 487 | // synopsys translate_on |
| 488 | end |
| 489 | |
| 490 | default: begin |
| 491 | n_unload_st = `IPP_UNLOAD_IDLE; |
| 492 | end |
| 493 | endcase |
| 494 | end |
| 495 | |
| 496 | // ============================================================================= |
| 497 | always @(req_rd_dfifo_sop or |
| 498 | req_rd_dfifo_eops or |
| 499 | c_dfifo_tag_st |
| 500 | ) begin |
| 501 | |
| 502 | n_dfifo_miss_eop = 1'h0; |
| 503 | n_dfifo_miss_sop = 1'h0; |
| 504 | |
| 505 | n_dfifo_tag_st = 2'h0; |
| 506 | |
| 507 | case (c_dfifo_tag_st) //synopsys parallel_case |
| 508 | /* 0in < case -default */ |
| 509 | |
| 510 | (`IPP_DFIFO_TAG_IDLE): |
| 511 | if (req_rd_dfifo_sop) |
| 512 | begin |
| 513 | n_dfifo_tag_st = `IPP_DFIFO_TAG_WAIT_EOP; |
| 514 | end |
| 515 | else |
| 516 | begin |
| 517 | n_dfifo_tag_st = c_dfifo_tag_st[1:0]; |
| 518 | end |
| 519 | |
| 520 | (`IPP_DFIFO_TAG_WAIT_EOP): |
| 521 | if (req_rd_dfifo_eops) |
| 522 | begin |
| 523 | n_dfifo_tag_st = `IPP_DFIFO_TAG_WAIT_SOP; |
| 524 | end |
| 525 | else if (req_rd_dfifo_sop) |
| 526 | begin |
| 527 | n_dfifo_miss_eop = 1'h1; |
| 528 | n_dfifo_tag_st = `IPP_DFIFO_TAG_IDLE; |
| 529 | end |
| 530 | else |
| 531 | begin |
| 532 | n_dfifo_tag_st = c_dfifo_tag_st[1:0]; |
| 533 | end |
| 534 | |
| 535 | (`IPP_DFIFO_TAG_WAIT_SOP): |
| 536 | if (req_rd_dfifo_sop) |
| 537 | begin |
| 538 | n_dfifo_tag_st = `IPP_DFIFO_TAG_WAIT_EOP; |
| 539 | end |
| 540 | else if (req_rd_dfifo_eops) |
| 541 | begin |
| 542 | n_dfifo_miss_sop = 1'h1; |
| 543 | n_dfifo_tag_st = `IPP_DFIFO_TAG_IDLE; |
| 544 | end |
| 545 | else |
| 546 | begin |
| 547 | n_dfifo_tag_st = c_dfifo_tag_st[1:0]; |
| 548 | end |
| 549 | |
| 550 | default: |
| 551 | begin |
| 552 | n_dfifo_tag_st = `IPP_DFIFO_TAG_IDLE; |
| 553 | end |
| 554 | |
| 555 | endcase |
| 556 | end |
| 557 | |
| 558 | // ============================================================================= |
| 559 | assign n_ipp_unload_idle = (n_unload_st[4:0]==`IPP_UNLOAD_IDLE); |
| 560 | |
| 561 | // ============================================================================= |
| 562 | assign n_hfifo_dat_rptr = ippfifo_rd_wr_ptr_bypass ? |
| 563 | (ippfifo_rd_ptr_pio_wr_en ? ipp_pio_wdata[6:0] : hfifo_dat_rptr[6:0]) : |
| 564 | (inc_hfifo_dat_rptr ? ipp_hfifo_dat_rptr[6:0] + 7'h1 : ipp_hfifo_dat_rptr[6:0]); |
| 565 | |
| 566 | assign ipp_hfifo_dat_rptr = lod_hfifo_base_rptr ? cur_pkt_hdr_base_ptr[6:0] : |
| 567 | hfifo_dat_rptr[6:0]; |
| 568 | |
| 569 | assign hfifo_dat_tag_rd = {2{inc_hfifo_dat_rptr_d}} & ipp_hfifo_dat_tag[1:0]; |
| 570 | assign n_hfifo_dat_tag_rd = {2{ipp_dfifo_full}} & (hfifo_dat_tag_rd[1:0] | hfifo_dat_tag_rd_d[1:0]); |
| 571 | assign ipp_hfifo_dat_tag_rd = hfifo_dat_tag_rd[1:0] | hfifo_dat_tag_rd_d[1:0]; |
| 572 | |
| 573 | // ============================================================================= |
| 574 | assign n_addr_wt_pkt = lod_dfifo_base_wptr ? addr_packet[10:0] : |
| 575 | inc_ipp_dfifo_wptr ? (addr_wt_pkt[10:0] + 11'h1) : |
| 576 | addr_wt_pkt[10:0]; |
| 577 | |
| 578 | assign n_addr_packet = wt_dfifo_1st_wd ? (addr_wt_pkt[10:0] + 11'h1) : |
| 579 | addr_packet[10:0]; |
| 580 | |
| 581 | assign n_addr_status = wt_dfifo_1st_wd ? ({1'b0,addr_wt_pkt[10:0]}) : |
| 582 | addr_status[11:0]; |
| 583 | |
| 584 | assign ipp_dfifo_wptr = datfifo_pio_wr_ena ? |
| 585 | (dfifo_wt_ptr_pio_wr_en ? ipp_pio_wdata[10:0] : ipp_dfifo_wptr_r[10:0]) : |
| 586 | wt_dfifo_1st_wd ? addr_status[10:0] : |
| 587 | (addr_wt_pkt[10:0]); |
| 588 | |
| 589 | assign n_ipp_dfifo_rptr = datfifo_pio_wr_ena ? |
| 590 | (dfifo_rd_ptr_pio_wr_en ? (ipp_pio_wdata[10:0]) : ipp_dfifo_rptr[10:0]) : |
| 591 | n_ipp_dmc_dat_ack ? (ipp_dfifo_rptr[10:0] + 11'h1) : |
| 592 | ipp_dfifo_rptr[10:0]; |
| 593 | |
| 594 | assign ipp_dfifo_rden = ipp_enable || datfifo_pio_wr_ena || reset; |
| 595 | //assign ipp_dfifo_rden = 1'h1; |
| 596 | |
| 597 | assign ipp_dfifo_wten = datfifo_pio_wr_ena ? dfifo_wt_data_reg_wr_en_pls : |
| 598 | ipp_dfifo_wten_pkt; |
| 599 | |
| 600 | assign dfifo_free_space = (addr_wt_pkt[10] == ipp_dfifo_rptr[10]) ? |
| 601 | 11'd1024 - {1'h0,(addr_wt_pkt[9:0] - ipp_dfifo_rptr[9:0])} : |
| 602 | {1'h0,(ipp_dfifo_rptr[9:0] - addr_wt_pkt[9:0])}; |
| 603 | |
| 604 | assign ipp_dfifo_amsful = dfifo_free_space <= 11'h1; |
| 605 | |
| 606 | assign ipp_dfifo_full = ipp_dfifo_amsful; |
| 607 | //assign ipp_dfifo_full = (addr_wt_pkt[10] == !ipp_dfifo_rptr[10]) && // 1k_ent, |
| 608 | // (addr_wt_pkt[9:0] == ipp_dfifo_rptr[9:0]);// spare? |
| 609 | |
| 610 | assign ipp_dfifo_empty = (addr_wt_pkt[10:0] == ipp_dfifo_rptr[10:0]); |
| 611 | |
| 612 | assign n_ipp_dmc_dat_ack = dmc_ipp_dat_req && !ipp_dfifo_empty && |
| 613 | (!(req_rd_dfifo_eop || req_rd_dfifo_eop_d1 || req_rd_dfifo_eop_d2)); |
| 614 | |
| 615 | assign req_rd_dfifo_eop = ipp_dmc_dat_ack_0 && !ipp_dmc_dat_emp_0 && |
| 616 | ipp_dfifo_dout_eop && !ipp_dfifo_dout_eop_d; |
| 617 | |
| 618 | assign req_rd_dfifo_eops = ipp_dmc_dat_ack_0 && !ipp_dmc_dat_emp_0 && |
| 619 | ipp_dfifo_dout_eop; |
| 620 | |
| 621 | assign req_rd_dfifo_sop = ipp_dmc_dat_ack_0 && !ipp_dmc_dat_emp_0 && |
| 622 | ipp_dfifo_dout_sop; |
| 623 | |
| 624 | assign ipp_dmc_dat_ack = ipp_dmc_dat_ack_2; |
| 625 | assign ipp_dmc_ful_pkt = ipp_dmc_ful_pkt_2; |
| 626 | |
| 627 | // ============================================================================= |
| 628 | always @(req_rd_dfifo_sop_rise_d or wt_dfifo_1st_wd_d2 or |
| 629 | dfifo_pkt_count |
| 630 | ) begin |
| 631 | case ({req_rd_dfifo_sop_rise_d,wt_dfifo_1st_wd_d2}) //synopsys parallel_case |
| 632 | /* 0in < case -default */ |
| 633 | (2'b11): n_dfifo_pkt_count = dfifo_pkt_count[8:0]; |
| 634 | (2'b10): n_dfifo_pkt_count = dfifo_pkt_count[8:0] - 9'h1; |
| 635 | (2'b01): n_dfifo_pkt_count = dfifo_pkt_count[8:0] + 9'h1; |
| 636 | (2'b00): n_dfifo_pkt_count = dfifo_pkt_count[8:0]; |
| 637 | default: n_dfifo_pkt_count = dfifo_pkt_count[8:0]; |
| 638 | endcase |
| 639 | end |
| 640 | |
| 641 | assign ecc_err_force = ipp_dmc_dat_ack_1 && ipp_dmc_dat_err1 || ecc_err_force_d; |
| 642 | assign n_ipp_dmc_ful_pkt = (n_dfifo_pkt_count[7:0]!=8'h0) && !n_dfifo_pkt_count[8]; |
| 643 | assign n_ipp_dmc_ful_pkt_2 = ipp_dmc_ful_pkt_1 && !ecc_err_force; |
| 644 | |
| 645 | // ============================================================================= |
| 646 | assign ipp_sum_info_vld = inc_hfifo_dat_rptr_d && |
| 647 | ((ipp_la3_vers==2'h1) || (ipp_la3_vers==2'h2)); |
| 648 | |
| 649 | assign ipp_full_cksum = ((ipp_la3_vers==2'h1) || (ipp_la3_vers==2'h2)) && |
| 650 | ((ipp_la4_prot==2'h1) || (ipp_la4_prot==2'h2)) || |
| 651 | pio_full_cksum; |
| 652 | |
| 653 | assign no_cksum = (ipp_la3_vers==2'h0) || (ipp_la3_vers==2'h3) || |
| 654 | ((ipp_la3_vers==2'h1) || (ipp_la3_vers==2'h2)) && !fet_pio_tcp_ena || |
| 655 | (ipp_la4_prot==2'h0) || (ipp_la4_prot==2'h3); |
| 656 | |
| 657 | assign n_ipp_cksum_done = (c_unload_st!=`IPP_UNLOAD_IDLE) && (ipp_cksum_done || no_cksum); |
| 658 | |
| 659 | assign ipp_cksum_done = sum_prt_valid || ipp_cksum_done_r; |
| 660 | |
| 661 | // ============================================================================= |
| 662 | always @ (posedge clk) |
| 663 | if (reset) |
| 664 | begin |
| 665 | ipp_ffl_dvalid_n_d <= #1 1'h0; |
| 666 | start_unload <= #1 1'h0; |
| 667 | inc_hfifo_dat_rptr_d <= #1 1'h0; |
| 668 | ipp_cksum_done_r <= #1 1'h0; |
| 669 | hfifo_dat_rptr <= #1 7'h0; |
| 670 | wt_dfifo_1st_wd_d <= #1 1'h0; |
| 671 | wt_dfifo_1st_wd_d2 <= #1 1'h0; |
| 672 | ipp_dfifo_wptr_r <= #1 11'h0; |
| 673 | addr_wt_pkt <= #1 11'h1; |
| 674 | addr_status <= #1 12'h0; |
| 675 | addr_packet <= #1 11'h1; |
| 676 | ipp_dfifo_dout_eop_d <= #1 1'h0; |
| 677 | ipp_dfifo_rptr <= #1 11'h0; |
| 678 | dfifo_pkt_count <= #1 9'h0; |
| 679 | dfifo_miss_eop <= #1 1'h0; |
| 680 | dfifo_miss_sop <= #1 1'h0; |
| 681 | bad_tag_mac_sta <= #1 1'h0; |
| 682 | hfifo_dat_tag_rd_d <= #1 2'h0; |
| 683 | clr_ipp_unload <= #1 1'h0; |
| 684 | c_unload_st <= #1 5'h0; |
| 685 | c_dfifo_tag_st <= #1 2'h0; |
| 686 | end |
| 687 | else |
| 688 | begin |
| 689 | ipp_ffl_dvalid_n_d <= #1 ipp_ffl_dvalid_n; |
| 690 | start_unload <= #1 start_unload_n; |
| 691 | inc_hfifo_dat_rptr_d <= #1 inc_hfifo_dat_rptr; |
| 692 | ipp_cksum_done_r <= #1 n_ipp_cksum_done; |
| 693 | hfifo_dat_rptr <= #1 n_hfifo_dat_rptr[6:0]; |
| 694 | wt_dfifo_1st_wd_d <= #1 wt_dfifo_1st_wd; |
| 695 | wt_dfifo_1st_wd_d2 <= #1 wt_dfifo_1st_wd_d; |
| 696 | ipp_dfifo_wptr_r <= #1 ipp_dfifo_wptr[10:0]; |
| 697 | addr_wt_pkt <= #1 n_addr_wt_pkt[10:0]; |
| 698 | addr_status <= #1 n_addr_status[11:0]; |
| 699 | addr_packet <= #1 n_addr_packet[10:0]; |
| 700 | ipp_dfifo_dout_eop_d <= #1 ipp_dfifo_dout_eop; // geo: correct?; |
| 701 | ipp_dfifo_rptr <= #1 n_ipp_dfifo_rptr[10:0]; |
| 702 | dfifo_pkt_count <= #1 n_dfifo_pkt_count[8:0]; |
| 703 | dfifo_miss_eop <= #1 (n_dfifo_miss_eop || bad_tag_mac_sta); |
| 704 | dfifo_miss_sop <= #1 (n_dfifo_miss_sop || bad_tag_mac_sta); |
| 705 | bad_tag_mac_sta <= #1 n_bad_tag_mac_sta; |
| 706 | hfifo_dat_tag_rd_d <= #1 n_hfifo_dat_tag_rd[1:0]; |
| 707 | clr_ipp_unload <= #1 n_clr_ipp_unload; |
| 708 | c_unload_st <= #1 n_unload_st[4:0]; |
| 709 | c_dfifo_tag_st <= #1 n_dfifo_tag_st[1:0]; |
| 710 | end |
| 711 | |
| 712 | ipp_reg_r_1 reg_r_1_ack0 (.di(n_ipp_dmc_dat_ack), .rs(reset), .ck(clk), .qo(ipp_dmc_dat_ack_0)); |
| 713 | ipp_reg_r_1 reg_r_1_ack1 (.di(ipp_dmc_dat_ack_0), .rs(reset), .ck(clk), .qo(ipp_dmc_dat_ack_1)); |
| 714 | ipp_reg_r_1 reg_r_1_ack2 (.di(ipp_dmc_dat_ack_1), .rs(reset), .ck(clk), .qo(ipp_dmc_dat_ack_2)); |
| 715 | |
| 716 | ipp_reg_r_1 reg_r_1_ful1 (.di(n_ipp_dmc_ful_pkt), .rs(reset), .ck(clk), .qo(ipp_dmc_ful_pkt_1)); |
| 717 | ipp_reg_r_1 reg_r_1_ful2 (.di(n_ipp_dmc_ful_pkt_2), .rs(reset), .ck(clk), .qo(ipp_dmc_ful_pkt_2)); |
| 718 | |
| 719 | ipp_reg_r_1 reg_r_1_emp0 (.di(ipp_dfifo_empty), .rs(reset), .ck(clk), .qo(ipp_dmc_dat_emp_0)); |
| 720 | |
| 721 | ipp_reg_r_1 reg_r_1_sop (.di(req_rd_dfifo_sop), .rs(reset), .ck(clk), .qo(req_rd_dfifo_sop_d)); |
| 722 | ipp_reg_r_1 reg_r_1_eop_d1 (.di(req_rd_dfifo_eop), .rs(reset), .ck(clk), .qo(req_rd_dfifo_eop_d1)); |
| 723 | ipp_reg_r_1 reg_r_1_eop_d2 (.di(req_rd_dfifo_eop_d1), .rs(reset), .ck(clk), .qo(req_rd_dfifo_eop_d2)); |
| 724 | |
| 725 | ipp_reg_r_1 reg_r_1_sop_d (.di(req_rd_dfifo_sop_rise), .rs(reset), .ck(clk), .qo(req_rd_dfifo_sop_rise_d)); |
| 726 | |
| 727 | ipp_reg_r_1 reg_r_1_sum_en (.di(n_fet_pio_tcp_ena), .rs(reset), .ck(clk), .qo(fet_pio_tcp_ena)); |
| 728 | |
| 729 | ipp_reg_r_1 reg_r_1_ecc_fu (.di(ecc_err_force), .rs(reset), .ck(clk), .qo(ecc_err_force_d)); |
| 730 | |
| 731 | `ifdef NEPTUNE |
| 732 | wire [3:0] do_nad; |
| 733 | wire [3:0] do_nor; |
| 734 | wire [3:0] do_inv; |
| 735 | wire [3:0] do_mux; |
| 736 | wire [3:0] do_q; |
| 737 | wire so; |
| 738 | |
| 739 | nep_spare_ipp spare_ipp_0 ( |
| 740 | .di_nd3 ({1'h1, 1'h1, do_q[3]}), |
| 741 | .di_nd2 ({1'h1, 1'h1, do_q[2]}), |
| 742 | .di_nd1 ({1'h1, 1'h1, do_q[1]}), |
| 743 | .di_nd0 ({1'h1, 1'h1, do_q[0]}), |
| 744 | .di_nr3 ({1'h0, 1'h0}), |
| 745 | .di_nr2 ({1'h0, 1'h0}), |
| 746 | .di_nr1 ({1'h0, 1'h0}), |
| 747 | .di_nr0 ({1'h0, 1'h0}), |
| 748 | .di_inv (do_nad[3:0]), |
| 749 | .di_mx3 ({1'h0, 1'h0}), |
| 750 | .di_mx2 ({1'h0, 1'h0}), |
| 751 | .di_mx1 ({1'h0, 1'h0}), |
| 752 | .di_mx0 ({1'h0, 1'h0}), |
| 753 | .mx_sel (do_nor[3:0]), |
| 754 | .di_reg (do_inv[3:0]), |
| 755 | .wt_ena (do_mux[3:0]), |
| 756 | .rst ({reset,reset,reset,reset}), |
| 757 | .si (1'h0), |
| 758 | .se (1'h0), |
| 759 | .clk (clk), |
| 760 | .do_nad (do_nad[3:0]), |
| 761 | .do_nor (do_nor[3:0]), |
| 762 | .do_inv (do_inv[3:0]), |
| 763 | .do_mux (do_mux[3:0]), |
| 764 | .do_q (do_q[3:0]), |
| 765 | .so (so) |
| 766 | ); |
| 767 | `endif |
| 768 | |
| 769 | endmodule // |
| 770 | |
| 771 | |