| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: dmu_pmu_prcd_q.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 | module dmu_pmu_prcd_q ( |
| 36 | clk, |
| 37 | rst_l, |
| 38 | enq, |
| 39 | rcd_in, |
| 40 | deq, |
| 41 | typ, |
| 42 | len, |
| 43 | byt_cnt, |
| 44 | cntxt_num, |
| 45 | pkseq_num, |
| 46 | addr, |
| 47 | addr_err, |
| 48 | dptr, |
| 49 | sbd_tag, |
| 50 | full, |
| 51 | overflow, |
| 52 | underflow, |
| 53 | empty |
| 54 | ); |
| 55 | |
| 56 | //************************************************ |
| 57 | // PARAMETERS |
| 58 | //************************************************ |
| 59 | |
| 60 | parameter DEPTH = 4; |
| 61 | |
| 62 | // Packet Record Field widths |
| 63 | |
| 64 | parameter SBDTAG_WDTH = `FIRE_DLC_IPR_SBDTAG_WDTH, // 5 |
| 65 | DPTR_WDTH = `FIRE_DLC_IPR_DPTR_WDTH, // 7 |
| 66 | // ADDRERR_WDTH = `FIRE_DLC_IPR_ADDRERR_WDTH, // 1 |
| 67 | ADDR_WDTH = `FIRE_DLC_IPR_ADDR_WDTH, //41 |
| 68 | PKSEQNUM_WDTH = `FIRE_DLC_IPR_PKSEQNUM_WDTH, // 5 |
| 69 | CNTXTNUM_WDTH = `FIRE_DLC_IPR_CNTXTNUM_WDTH, // 5 |
| 70 | BYTCNT_WDTH = `FIRE_DLC_IPR_BYTCNT_WDTH, //12 |
| 71 | LEN_WDTH = `FIRE_DLC_IPR_LEN_WDTH, //10 |
| 72 | TYP_WDTH = `FIRE_DLC_IPR_TYP_WDTH; // 7 |
| 73 | |
| 74 | parameter SBDTAGMSB = SBDTAG_WDTH -1, |
| 75 | DPTRMSB = DPTR_WDTH -1, |
| 76 | ADDRMSB = ADDR_WDTH -1, |
| 77 | PKSEQNUMMSB = PKSEQNUM_WDTH -1, |
| 78 | CNTXTNUMMSB = CNTXTNUM_WDTH -1, |
| 79 | BYTCNTMSB = BYTCNT_WDTH -1, |
| 80 | LENMSB = LEN_WDTH -1, |
| 81 | TYPMSB = TYP_WDTH -1; |
| 82 | |
| 83 | parameter SBDTAG_LSB = 0, |
| 84 | SBDTAG_MSB = `FIRE_DLC_IPR_SBDTAG_MSB, |
| 85 | DPTR_LSB = `FIRE_DLC_IPR_DPTR_LSB, |
| 86 | DPTR_MSB = `FIRE_DLC_IPR_DPTR_MSB, |
| 87 | ADDRERR_MSB = `FIRE_DLC_IPR_ADDRERR_MSB, |
| 88 | ADDR_LSB = `FIRE_DLC_IPR_ADDR_LSB, |
| 89 | ADDR_MSB = `FIRE_DLC_IPR_ADDR_MSB, |
| 90 | PKSEQNUM_LSB = `FIRE_DLC_IPR_PKSEQNUM_LSB, |
| 91 | PKSEQNUM_MSB = `FIRE_DLC_IPR_PKSEQNUM_MSB, |
| 92 | CNTXTNUM_LSB = `FIRE_DLC_IPR_CNTXTNUM_LSB, |
| 93 | CNTXTNUM_MSB = `FIRE_DLC_IPR_CNTXTNUM_MSB, |
| 94 | BYTCNT_LSB = `FIRE_DLC_IPR_BYTCNT_LSB, |
| 95 | BYTCNT_MSB = `FIRE_DLC_IPR_BYTCNT_MSB, |
| 96 | LEN_LSB = `FIRE_DLC_IPR_LEN_LSB, |
| 97 | LEN_MSB = `FIRE_DLC_IPR_LEN_MSB, |
| 98 | TYP_LSB = `FIRE_DLC_IPR_TYP_LSB, |
| 99 | TYP_MSB = `FIRE_DLC_IPR_TYP_MSB; |
| 100 | |
| 101 | // parameter CM2PM_WDTH = `FIRE_DLC_IPR_REC_WDTH; //93 |
| 102 | |
| 103 | parameter IPRMSB = `FIRE_DLC_IPR_MSB; // CM2PM_WDTH -1; |
| 104 | |
| 105 | |
| 106 | //************************************************ |
| 107 | // PORTS |
| 108 | //************************************************ |
| 109 | |
| 110 | input clk; // The input clock |
| 111 | input rst_l; // fifo reset |
| 112 | |
| 113 | input [IPRMSB :0] rcd_in; // packet record in |
| 114 | input enq; // enqueue to prcd_q |
| 115 | input deq; // local dequeue for packet fifo |
| 116 | |
| 117 | output [TYPMSB : 0] typ; |
| 118 | output [LENMSB : 0] len; |
| 119 | output [BYTCNTMSB : 0] byt_cnt; |
| 120 | output [CNTXTNUMMSB : 0] cntxt_num; |
| 121 | output [PKSEQNUMMSB : 0] pkseq_num; |
| 122 | output [ADDRMSB : 0] addr; |
| 123 | output addr_err; |
| 124 | output [DPTRMSB : 0] dptr; |
| 125 | output [SBDTAGMSB : 0] sbd_tag; |
| 126 | |
| 127 | output full; // prcd_q is full |
| 128 | output overflow; // prcd_q overflow |
| 129 | output underflow; // prcd_q underflow |
| 130 | output empty; // fifo empty exported |
| 131 | |
| 132 | //************************************************ |
| 133 | // SIGNALS |
| 134 | //************************************************ |
| 135 | |
| 136 | wire clk; |
| 137 | wire rst_l; |
| 138 | wire typ_full; |
| 139 | |
| 140 | // wire len_full, // left in comments for later use if needed |
| 141 | // bytcnt_full, |
| 142 | // cntxtnum_full, |
| 143 | // pkseqnum_full, |
| 144 | // addr_full, |
| 145 | // dptr_full, |
| 146 | // sbdtag_full; |
| 147 | |
| 148 | wire typ_empty, typ_overflow, typ_underflow; |
| 149 | wire len_empty, len_overflow, len_underflow; |
| 150 | wire bytcnt_empty, bytcnt_overflow, bytcnt_underflow; |
| 151 | wire cntxtnum_empty, cntxtnum_overflow, cntxtnum_underflow; |
| 152 | wire pkseqnum_empty, pkseqnum_overflow, pkseqnum_underflow; |
| 153 | wire addr_empty, addr_overflow, addr_underflow; |
| 154 | wire dptr_empty, dptr_overflow, dptr_underflow; |
| 155 | wire sbdtag_empty, sbdtag_overflow, sbdtag_underflow; |
| 156 | |
| 157 | wire [TYPMSB : 0] rcd_typ; |
| 158 | wire [LENMSB : 0] rcd_len; |
| 159 | wire [BYTCNTMSB : 0] rcd_bytcnt; |
| 160 | wire [CNTXTNUMMSB : 0] rcd_cntxtnum; |
| 161 | wire [PKSEQNUMMSB : 0] rcd_pkseqnum; |
| 162 | wire [ADDRMSB : 0] rcd_addr; |
| 163 | wire rcd_addrerr; |
| 164 | wire [DPTRMSB : 0] rcd_dptr; |
| 165 | wire [SBDTAGMSB : 0] rcd_sbdtag; |
| 166 | |
| 167 | //************************************************ |
| 168 | // Zero In checkers |
| 169 | //************************************************ |
| 170 | |
| 171 | |
| 172 | |
| 173 | |
| 174 | // Packet Record field assignments to PRM signals |
| 175 | assign rcd_typ[TYPMSB : 0] = rcd_in[TYP_MSB : TYP_LSB ]; |
| 176 | assign rcd_len[LENMSB : 0] = rcd_in[LEN_MSB : LEN_LSB]; |
| 177 | assign rcd_bytcnt[BYTCNTMSB : 0] = rcd_in[BYTCNT_MSB : BYTCNT_LSB]; |
| 178 | assign rcd_cntxtnum[CNTXTNUMMSB : 0] = rcd_in[CNTXTNUM_MSB : CNTXTNUM_LSB]; |
| 179 | assign rcd_pkseqnum[PKSEQNUMMSB : 0] = rcd_in[PKSEQNUM_MSB : PKSEQNUM_LSB]; |
| 180 | assign rcd_addr[ADDRMSB : 0] = rcd_in[ADDR_MSB : ADDR_LSB]; |
| 181 | assign rcd_addrerr = rcd_in[ADDRERR_MSB]; |
| 182 | assign rcd_dptr[DPTRMSB : 0] = rcd_in[DPTR_MSB : DPTR_LSB]; |
| 183 | assign rcd_sbdtag[SBDTAGMSB : 0] = rcd_in[SBDTAG_MSB : SBDTAG_LSB]; |
| 184 | |
| 185 | //************************************************ |
| 186 | // Modules |
| 187 | //************************************************ |
| 188 | |
| 189 | fire_dmc_common_srfifo #(TYP_WDTH, DEPTH) typ_srfifo ( |
| 190 | .clk (clk), |
| 191 | .rst_l (rst_l), |
| 192 | .enq (enq), |
| 193 | .data_in (rcd_typ), |
| 194 | .deq (deq), |
| 195 | .data_out (typ), |
| 196 | .full (typ_full), |
| 197 | .empty (typ_empty), |
| 198 | .overflow(typ_overflow), |
| 199 | .underflow(typ_underflow) |
| 200 | ); |
| 201 | |
| 202 | fire_dmc_common_srfifo #(LEN_WDTH, DEPTH) len_srfifo ( |
| 203 | .clk (clk), |
| 204 | .rst_l (rst_l), |
| 205 | .enq (enq), |
| 206 | .data_in (rcd_len), |
| 207 | .deq (deq), |
| 208 | .data_out (len), |
| 209 | .full (), // left as null port for later use if needed |
| 210 | .empty (len_empty), |
| 211 | .overflow(len_overflow), |
| 212 | .underflow(len_underflow) |
| 213 | ); |
| 214 | |
| 215 | fire_dmc_common_srfifo #(BYTCNT_WDTH, DEPTH) bytcnt_srfifo ( |
| 216 | .clk (clk), |
| 217 | .rst_l (rst_l), |
| 218 | .enq (enq), |
| 219 | .data_in (rcd_bytcnt), |
| 220 | .deq (deq), |
| 221 | .data_out (byt_cnt), |
| 222 | .full (), // left as null port for later use if needed |
| 223 | .empty (bytcnt_empty), |
| 224 | .overflow(bytcnt_overflow), |
| 225 | .underflow(bytcnt_underflow) |
| 226 | ); |
| 227 | |
| 228 | fire_dmc_common_srfifo #(CNTXTNUM_WDTH, DEPTH) cntxtnum_srfifo ( |
| 229 | .clk (clk), |
| 230 | .rst_l (rst_l), |
| 231 | .enq (enq), |
| 232 | .data_in (rcd_cntxtnum), |
| 233 | .deq (deq), |
| 234 | .data_out (cntxt_num), |
| 235 | .full (), // left as null port for later use if needed |
| 236 | .empty (cntxtnum_empty), |
| 237 | .overflow(cntxtnum_overflow), |
| 238 | .underflow(cntxtnum_underflow) |
| 239 | ); |
| 240 | |
| 241 | fire_dmc_common_srfifo #(PKSEQNUM_WDTH, DEPTH) pkseqnum_srfifo ( |
| 242 | .clk (clk), |
| 243 | .rst_l (rst_l), |
| 244 | .enq (enq), |
| 245 | .data_in (rcd_pkseqnum), |
| 246 | .deq (deq), |
| 247 | .data_out (pkseq_num), |
| 248 | .full (), // left as null port for later use if needed |
| 249 | .empty (pkseqnum_empty), |
| 250 | .overflow(pkseqnum_overflow), |
| 251 | .underflow(pkseqnum_underflow) |
| 252 | ); |
| 253 | |
| 254 | // address, address err in same fifo |
| 255 | fire_dmc_common_srfifo #(ADDR_WDTH +1, DEPTH) addr_srfifo ( |
| 256 | .clk (clk), |
| 257 | .rst_l (rst_l), |
| 258 | .enq (enq), |
| 259 | .data_in ({rcd_addr, rcd_addrerr}), |
| 260 | .deq (deq), |
| 261 | .data_out ({addr, addr_err}), |
| 262 | .full (), // left as null port for later use if needed |
| 263 | .empty (addr_empty), |
| 264 | .overflow(addr_overflow), |
| 265 | .underflow(addr_underflow) |
| 266 | ); |
| 267 | |
| 268 | fire_dmc_common_srfifo #(DPTR_WDTH, DEPTH) dptr_srfifo ( |
| 269 | .clk (clk), |
| 270 | .rst_l (rst_l), |
| 271 | .enq (enq), |
| 272 | .data_in (rcd_dptr), |
| 273 | .deq (deq), |
| 274 | .data_out (dptr), |
| 275 | .full (), // left as null port for later use if needed |
| 276 | .empty (dptr_empty), |
| 277 | .overflow(dptr_overflow), |
| 278 | .underflow(dptr_underflow) |
| 279 | ); |
| 280 | |
| 281 | fire_dmc_common_srfifo #(SBDTAG_WDTH, DEPTH) sbdtag_srfifo ( |
| 282 | .clk (clk), |
| 283 | .rst_l (rst_l), |
| 284 | .enq (enq), |
| 285 | .data_in (rcd_sbdtag), |
| 286 | .deq (deq), |
| 287 | .data_out (sbd_tag), |
| 288 | .full (), // left as null port for later use if needed |
| 289 | .empty (sbdtag_empty), |
| 290 | .overflow(sbdtag_overflow), |
| 291 | .underflow(sbdtag_underflow) |
| 292 | ); |
| 293 | |
| 294 | // commented out for later use if needed |
| 295 | //assign full = (typ_full | len_full | bytcnt_full | cntxtnum_full | |
| 296 | // pkseqnum_full | addr_full | dptr_full | sbdtag_full); |
| 297 | |
| 298 | assign full = typ_full; // since all fifos are in lock step, single registered |
| 299 | // fifo full can be exported |
| 300 | |
| 301 | assign overflow = (typ_overflow | len_overflow | bytcnt_overflow | |
| 302 | cntxtnum_overflow | pkseqnum_overflow | addr_overflow | |
| 303 | dptr_overflow | sbdtag_overflow); |
| 304 | |
| 305 | assign underflow = (typ_underflow | len_underflow | bytcnt_underflow | |
| 306 | cntxtnum_underflow | pkseqnum_underflow | addr_underflow | |
| 307 | dptr_underflow | sbdtag_underflow); |
| 308 | |
| 309 | assign empty = (typ_empty & len_empty & bytcnt_empty & cntxtnum_empty & |
| 310 | pkseqnum_empty & addr_empty & dptr_empty & sbdtag_empty); |
| 311 | |
| 312 | endmodule |