| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: niu_smx_sm_resp_cmdlaunch.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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| 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 | module niu_smx_sm_resp_cmdlaunch( |
| 37 | /*AUTOARG*/ |
| 38 | // Outputs |
| 39 | smx_dmc_rdy, smx_dmc_cmd, smx_dmc_cmd_status, smx_dmc_addr, |
| 40 | smx_dmc_len, smx_dmc_xid, smx_dmc_port, smx_dmc_dma, |
| 41 | smx_dmc_client, smx_dmc_ack_rdy, smx_dmc_ack_cmd, |
| 42 | smx_dmc_ack_cmd_status, |
| 43 | smx_dmc_ack_xid, |
| 44 | smx_dmc_ack_dma, |
| 45 | smx_dmc_ack_client, rst_procflag, dvflag, |
| 46 | dvflag_with_data, dvflag_line_en, dvflag_sop_pos, dvflag_eop_pos, |
| 47 | dvflag_sop_byte_en, dvflag_eop_byte_en, dvflag_client, |
| 48 | dvflag_xcomp, dvflag_status, early_dvflag, early_dvflag_with_data, |
| 49 | early_dvflag_line_en, early_dvflag_sop_pos, early_dvflag_eop_pos, |
| 50 | early_dvflag_sop_byte_en, early_dvflag_eop_byte_en, |
| 51 | early_dvflag_client, early_dvflag_xcomp, early_dvflag_status, |
| 52 | cmdl_tohdl_ack, cmdl_cs, |
| 53 | // Inputs |
| 54 | clk, reset_l, dmc_smx_accept, dmc_smx_ack_accept, procflag, |
| 55 | procflag_cmd, procflag_addr, procflag_xid, |
| 56 | procflag_port, procflag_dma, procflag_client, |
| 57 | procflag_sop_line_en, procflag_eop_line_en, procflag_sop_byte_en, |
| 58 | procflag_eop_byte_en, procflag_err, procflag_rd, |
| 59 | procflag_with_data, procflag_xcomp, procflag_sop, procflag_eop, |
| 60 | rst_dvflag, dv_idle, tohdl_cmdl_req, tohdl_cmdl_cmd, |
| 61 | tohdl_cmdl_addr, tohdl_cmdl_len, tohdl_cmdl_xid, tohdl_cmdl_port, |
| 62 | tohdl_cmdl_dma, tohdl_cmdl_client, tid_dirty_rdata_bus |
| 63 | ); |
| 64 | |
| 65 | input clk; |
| 66 | input reset_l; |
| 67 | |
| 68 | // dmc if |
| 69 | output smx_dmc_rdy; |
| 70 | output [7:0] smx_dmc_cmd; |
| 71 | output [3:0] smx_dmc_cmd_status; |
| 72 | output [63:0] smx_dmc_addr; |
| 73 | output [13:0] smx_dmc_len; |
| 74 | output [5:0] smx_dmc_xid; |
| 75 | output [1:0] smx_dmc_port; |
| 76 | output [4:0] smx_dmc_dma; |
| 77 | output [7:0] smx_dmc_client; |
| 78 | input [7:0] dmc_smx_accept; |
| 79 | |
| 80 | // ack if |
| 81 | output smx_dmc_ack_rdy; |
| 82 | output [7:0] smx_dmc_ack_cmd; |
| 83 | output [3:0] smx_dmc_ack_cmd_status; |
| 84 | // output [63:0] smx_dmc_ack_addr; |
| 85 | // output [13:0] smx_dmc_ack_len; |
| 86 | output [5:0] smx_dmc_ack_xid; |
| 87 | // output [1:0] smx_dmc_ack_port; |
| 88 | output [4:0] smx_dmc_ack_dma; |
| 89 | output [7:0] smx_dmc_ack_client; |
| 90 | input [7:0] dmc_smx_ack_accept; |
| 91 | |
| 92 | // cmdproc if |
| 93 | input procflag; |
| 94 | input [7:0] procflag_cmd; |
| 95 | input [63:0] procflag_addr; |
| 96 | input [5:0] procflag_xid; |
| 97 | input [1:0] procflag_port; |
| 98 | input [4:0] procflag_dma; |
| 99 | input [7:0] procflag_client; |
| 100 | input [3:0] procflag_sop_line_en; |
| 101 | input [3:0] procflag_eop_line_en; |
| 102 | input [3:0] procflag_sop_byte_en; |
| 103 | input [3:0] procflag_eop_byte_en; |
| 104 | input [2:0] procflag_err; |
| 105 | input procflag_rd; // rd= 1, wr= 0 |
| 106 | input procflag_with_data; //1- data, 0- no data |
| 107 | input procflag_xcomp; |
| 108 | input procflag_sop; |
| 109 | input procflag_eop; |
| 110 | output rst_procflag; |
| 111 | |
| 112 | // output cmdlaunch_idle; // in case need save 1 cycle at start |
| 113 | // input early_procflag; |
| 114 | // input [150:0] early_procflag_data; // not use for now |
| 115 | |
| 116 | |
| 117 | // dv if |
| 118 | output dvflag; |
| 119 | output [1:0] dvflag_with_data; // 1= rd (data,dv also sio dq) , |
| 120 | // 0= wr/rderr (sio dq only) |
| 121 | output [3:0] dvflag_line_en; |
| 122 | output [3:0] dvflag_sop_pos; // indicate first data line position |
| 123 | output [3:0] dvflag_eop_pos; // indicate last data line position |
| 124 | output [15:0] dvflag_sop_byte_en; // use this for 'first' data line |
| 125 | output [15:0] dvflag_eop_byte_en; // use this for 'last' data line |
| 126 | output [7:0] dvflag_client; |
| 127 | output [3:0] dvflag_xcomp; |
| 128 | output [3:0] dvflag_status; |
| 129 | input rst_dvflag; |
| 130 | |
| 131 | input dv_idle; // dv in idle state |
| 132 | output early_dvflag; // dv needs to be in idle to catch this pulse |
| 133 | // and dvflag not set |
| 134 | output [1:0] early_dvflag_with_data; // 1= rd (data,dv also sio dq) , |
| 135 | // 0= wr/rderr (sio dq only) |
| 136 | output [3:0] early_dvflag_line_en; |
| 137 | output [3:0] early_dvflag_sop_pos; // indicate first data line position |
| 138 | output [3:0] early_dvflag_eop_pos; // indicate last data line position |
| 139 | output [15:0] early_dvflag_sop_byte_en; // use this for 'first' data line |
| 140 | output [15:0] early_dvflag_eop_byte_en; // use this for 'last' data line |
| 141 | output [7:0] early_dvflag_client; |
| 142 | output [3:0] early_dvflag_xcomp; |
| 143 | output [3:0] early_dvflag_status; |
| 144 | |
| 145 | // TO handler if |
| 146 | input tohdl_cmdl_req; |
| 147 | input [7:0] tohdl_cmdl_cmd; |
| 148 | input [63:0] tohdl_cmdl_addr; |
| 149 | input [13:0] tohdl_cmdl_len; |
| 150 | input [5:0] tohdl_cmdl_xid; |
| 151 | input [1:0] tohdl_cmdl_port; |
| 152 | input [4:0] tohdl_cmdl_dma; |
| 153 | input [7:0] tohdl_cmdl_client; |
| 154 | output cmdl_tohdl_ack; |
| 155 | |
| 156 | output [2:0] cmdl_cs; |
| 157 | |
| 158 | // status i/f |
| 159 | input [63:0] tid_dirty_rdata_bus; |
| 160 | |
| 161 | function [15:0] decode_eop_16b_byte_en_little; // B15,B14..,B1,B0 |
| 162 | input [3:0] offset; |
| 163 | |
| 164 | reg [15:0] byte_en; |
| 165 | begin |
| 166 | case(offset) |
| 167 | 4'h0: byte_en= 16'hffff; |
| 168 | 4'h1: byte_en= 16'h1; |
| 169 | 4'h2: byte_en= 16'h3; |
| 170 | 4'h3: byte_en= 16'h7; |
| 171 | 4'h4: byte_en= 16'hf; |
| 172 | 4'h5: byte_en= 16'h1f; |
| 173 | 4'h6: byte_en= 16'h3f; |
| 174 | 4'h7: byte_en= 16'h7f; |
| 175 | 4'h8: byte_en= 16'hff; |
| 176 | 4'h9: byte_en= 16'h1ff; |
| 177 | 4'ha: byte_en= 16'h3ff; |
| 178 | 4'hb: byte_en= 16'h7ff; |
| 179 | 4'hc: byte_en= 16'hfff; |
| 180 | 4'hd: byte_en= 16'h1fff; |
| 181 | 4'he: byte_en= 16'h3fff; |
| 182 | 4'hf: byte_en= 16'h7fff; |
| 183 | endcase |
| 184 | decode_eop_16b_byte_en_little= byte_en; |
| 185 | end |
| 186 | endfunction |
| 187 | |
| 188 | function [15:0] decode_sop_16b_byte_en_little; // B15,B14..,B1,B0 |
| 189 | input [3:0] offset; |
| 190 | |
| 191 | reg [15:0] byte_en; |
| 192 | begin |
| 193 | case(offset) |
| 194 | 4'h0: byte_en= 16'hffff; |
| 195 | 4'h1: byte_en= 16'hfffe; |
| 196 | 4'h2: byte_en= 16'hfffc; |
| 197 | 4'h3: byte_en= 16'hfff8; |
| 198 | 4'h4: byte_en= 16'hfff0; |
| 199 | 4'h5: byte_en= 16'hffe0; |
| 200 | 4'h6: byte_en= 16'hffc0; |
| 201 | 4'h7: byte_en= 16'hff80; |
| 202 | 4'h8: byte_en= 16'hff00; |
| 203 | 4'h9: byte_en= 16'hfe00; |
| 204 | 4'ha: byte_en= 16'hfc00; |
| 205 | 4'hb: byte_en= 16'hf800; |
| 206 | 4'hc: byte_en= 16'hf000; |
| 207 | 4'hd: byte_en= 16'he000; |
| 208 | 4'he: byte_en= 16'hc000; |
| 209 | 4'hf: byte_en= 16'h8000; |
| 210 | endcase |
| 211 | decode_sop_16b_byte_en_little= byte_en; |
| 212 | end |
| 213 | endfunction |
| 214 | |
| 215 | |
| 216 | /* |
| 217 | function [15:0] decode_eop_16b_byte_en_big; // B0,B1...,B14,B15 |
| 218 | input [3:0] offset; |
| 219 | |
| 220 | reg [15:0] byte_en; |
| 221 | |
| 222 | begin |
| 223 | case(offset) |
| 224 | 4'h0: byte_en= 16'hffff; |
| 225 | 4'h1: byte_en= 16'h8000; |
| 226 | 4'h2: byte_en= 16'hc000; |
| 227 | 4'h3: byte_en= 16'he000; |
| 228 | 4'h4: byte_en= 16'hf000; |
| 229 | 4'h5: byte_en= 16'hf800; |
| 230 | 4'h6: byte_en= 16'hfc00; |
| 231 | 4'h7: byte_en= 16'hfe00; |
| 232 | 4'h8: byte_en= 16'hff00; |
| 233 | 4'h9: byte_en= 16'hff80; |
| 234 | 4'ha: byte_en= 16'hffc0; |
| 235 | 4'hb: byte_en= 16'hffe0; |
| 236 | 4'hc: byte_en= 16'hfff0; |
| 237 | 4'hd: byte_en= 16'hfff8; |
| 238 | 4'he: byte_en= 16'hfffc; |
| 239 | 4'hf: byte_en= 16'hfffe; |
| 240 | endcase |
| 241 | decode_eop_16b_byte_en_big= byte_en; |
| 242 | end |
| 243 | endfunction |
| 244 | |
| 245 | function [15:0] decode_sop_16b_byte_en_big; // B0,B1...,B14,B15 |
| 246 | input [3:0] offset; |
| 247 | |
| 248 | reg [15:0] byte_en; |
| 249 | |
| 250 | begin |
| 251 | case(offset) |
| 252 | 4'h0: byte_en= 16'hffff; |
| 253 | 4'h1: byte_en= 16'h7fff; |
| 254 | 4'h2: byte_en= 16'h3fff; |
| 255 | 4'h3: byte_en= 16'h1fff; |
| 256 | 4'h4: byte_en= 16'h0fff; |
| 257 | 4'h5: byte_en= 16'h07ff; |
| 258 | 4'h6: byte_en= 16'h03ff; |
| 259 | 4'h7: byte_en= 16'h01ff; |
| 260 | 4'h8: byte_en= 16'h00ff; |
| 261 | 4'h9: byte_en= 16'h007f; |
| 262 | 4'ha: byte_en= 16'h003f; |
| 263 | 4'hb: byte_en= 16'h001f; |
| 264 | 4'hc: byte_en= 16'h000f; |
| 265 | 4'hd: byte_en= 16'h0007; |
| 266 | 4'he: byte_en= 16'h0003; |
| 267 | 4'hf: byte_en= 16'h0001; |
| 268 | endcase |
| 269 | decode_sop_16b_byte_en_big= byte_en; |
| 270 | end |
| 271 | endfunction |
| 272 | */ |
| 273 | |
| 274 | parameter cmdl_s0= 3'h0, |
| 275 | cmdl_s1= 3'h1, |
| 276 | cmdl_s2= 3'h2, |
| 277 | cmdl_s3= 3'h3, |
| 278 | cmdl_s4= 3'h4; |
| 279 | |
| 280 | |
| 281 | wire client_accept_n= (|(dmc_smx_accept & smx_dmc_client)) | |
| 282 | (|(dmc_smx_ack_accept & smx_dmc_ack_client)); |
| 283 | |
| 284 | reg early_dvflag_n; |
| 285 | wire early_dvflag= early_dvflag_n; |
| 286 | |
| 287 | reg rst_procflag_n; |
| 288 | wire rst_procflag= rst_procflag_n; |
| 289 | |
| 290 | |
| 291 | reg smx_dmc_rdy_n, smx_dmc_rdy ; |
| 292 | reg smx_dmc_ack_rdy_n, smx_dmc_ack_rdy ; |
| 293 | reg ld_dmc_n; |
| 294 | reg set_dvflag_n; |
| 295 | reg dvflag; |
| 296 | reg [2:0] cmdl_ns, cmdl_cs; |
| 297 | wire cmdl_req_n= procflag && !dvflag; |
| 298 | reg rst_serve_tohdl_n; |
| 299 | reg cmdl_tohdl_ack_n; |
| 300 | wire cmdl_tohdl_ack= cmdl_tohdl_ack_n; |
| 301 | reg serve_tohdl; |
| 302 | |
| 303 | wire proc_tid_is_dirty= tid_dirty_rdata_bus[procflag_xid]; |
| 304 | |
| 305 | always @(/*AUTOSENSE*/client_accept_n or cmdl_cs or cmdl_req_n |
| 306 | or dv_idle or dvflag or procflag or procflag_err |
| 307 | or procflag_rd or serve_tohdl or smx_dmc_ack_rdy |
| 308 | or smx_dmc_rdy or tohdl_cmdl_req or tohdl_cmdl_xid |
| 309 | or proc_tid_is_dirty) begin |
| 310 | smx_dmc_rdy_n= smx_dmc_rdy; |
| 311 | smx_dmc_ack_rdy_n= smx_dmc_ack_rdy; |
| 312 | ld_dmc_n= 1'b0; // pulse to flop out smx_dmc cmd bus |
| 313 | set_dvflag_n= 1'b0; // also set dvflag_data |
| 314 | early_dvflag_n= 1'b0; |
| 315 | rst_procflag_n= 1'b0; |
| 316 | rst_serve_tohdl_n= 1'b0; |
| 317 | cmdl_tohdl_ack_n= 1'b0; |
| 318 | cmdl_ns= cmdl_cs; |
| 319 | case(cmdl_cs) |
| 320 | cmdl_s0: begin // wait procflag & !dvflag |
| 321 | // gen early_dvflag_xx using procflag_xx |
| 322 | |
| 323 | // err ??? time share this with |
| 324 | // err handle; |
| 325 | // if both arb: serve_errhdl_first & lauch_err, cmdl_s3 (errhdl state) |
| 326 | // set served errhdl_first= each regular served |
| 327 | // rst each errhdl served |
| 328 | // |
| 329 | if(tohdl_cmdl_req & (serve_tohdl | (~serve_tohdl & ~cmdl_req_n))) begin |
| 330 | if(!dvflag) cmdl_ns= cmdl_s3; |
| 331 | end |
| 332 | else begin |
| 333 | if(procflag && !dvflag) begin |
| 334 | // flop in procflag_xx (->early_dvflag_xx) |
| 335 | rst_procflag_n= 1'b1; |
| 336 | if(procflag_err[0] | proc_tid_is_dirty) begin // pkterr; drop pkt |
| 337 | cmdl_ns= cmdl_s2; |
| 338 | end |
| 339 | else begin // launch cmd |
| 340 | if(procflag_rd) // rd |
| 341 | smx_dmc_rdy_n= 1'b1; |
| 342 | else // wr |
| 343 | smx_dmc_ack_rdy_n= 1'b1; |
| 344 | ld_dmc_n= 1'b1; // flop out dmc cmd bus |
| 345 | cmdl_ns= cmdl_s1; |
| 346 | end |
| 347 | end |
| 348 | end |
| 349 | end |
| 350 | cmdl_s1: begin // wait dmc client accept |
| 351 | // use procflag_xx_r to derive dvflag_xx_n |
| 352 | if(client_accept_n) begin |
| 353 | if(dv_idle) // kick dv earlier; save one cycle at start |
| 354 | early_dvflag_n= 1'b1; // early_dvflag_xx available |
| 355 | else |
| 356 | set_dvflag_n= 1'b1; |
| 357 | smx_dmc_rdy_n= 1'b0; // put all rdy to 0 |
| 358 | smx_dmc_ack_rdy_n= 1'b0; |
| 359 | cmdl_ns= cmdl_s0; |
| 360 | end |
| 361 | end |
| 362 | cmdl_s2: begin // pkterr; drop pkt |
| 363 | set_dvflag_n= 1'b1; |
| 364 | cmdl_ns= cmdl_s0; |
| 365 | end |
| 366 | cmdl_s3: begin // TO hdlr |
| 367 | rst_serve_tohdl_n= 1'b1; |
| 368 | ld_dmc_n= 1'b1; |
| 369 | if(tohdl_cmdl_xid[5]) // wr |
| 370 | smx_dmc_ack_rdy_n= 1'b1; |
| 371 | else |
| 372 | smx_dmc_rdy_n= 1'b1; |
| 373 | cmdl_ns= cmdl_s4; |
| 374 | end |
| 375 | cmdl_s4: begin |
| 376 | if(client_accept_n) begin |
| 377 | set_dvflag_n= 1'b1; |
| 378 | smx_dmc_rdy_n= 1'b0; // put all rdy to 0 |
| 379 | smx_dmc_ack_rdy_n= 1'b0; |
| 380 | cmdl_tohdl_ack_n= 1'b1; |
| 381 | cmdl_ns= cmdl_s0; |
| 382 | end |
| 383 | end |
| 384 | endcase |
| 385 | end |
| 386 | |
| 387 | always @(posedge clk) begin |
| 388 | if(!reset_l) begin |
| 389 | cmdl_cs<= `SMX_PD cmdl_s0; |
| 390 | smx_dmc_rdy<= `SMX_PD 1'b0; |
| 391 | smx_dmc_ack_rdy<= `SMX_PD 1'b0; |
| 392 | dvflag<= `SMX_PD 1'b0; |
| 393 | serve_tohdl<= `SMX_PD 1'b0; |
| 394 | end |
| 395 | else begin |
| 396 | cmdl_cs<= `SMX_PD cmdl_ns; |
| 397 | smx_dmc_rdy<= `SMX_PD smx_dmc_rdy_n; |
| 398 | smx_dmc_ack_rdy<= `SMX_PD smx_dmc_ack_rdy_n; |
| 399 | if(set_dvflag_n) dvflag<= `SMX_PD 1'b1; |
| 400 | else if(rst_dvflag) dvflag<= `SMX_PD 1'b0; |
| 401 | if(rst_procflag_n) serve_tohdl<= `SMX_PD 1'b1; |
| 402 | else if(rst_serve_tohdl_n) serve_tohdl<= `SMX_PD 1'b0; |
| 403 | end |
| 404 | end |
| 405 | |
| 406 | // wire cmdlaunch_idle= (cmdl_cs==cmdl_s0); |
| 407 | |
| 408 | // reg [3:0] procflag_sop_line_en_r; |
| 409 | // reg [3:0] procflag_eop_line_en_r; |
| 410 | // reg [3:0] procflag_sop_byte_en_r; |
| 411 | // reg [3:0] procflag_eop_byte_en_r; |
| 412 | // reg [2:0] procflag_err_r; |
| 413 | // reg procflag_rd_r; |
| 414 | // reg procflag_with_data_r; |
| 415 | // reg procflag_xcomp_r; |
| 416 | // reg procflag_sop_r; |
| 417 | // reg procflag_eop_r; |
| 418 | |
| 419 | reg [7:0] smx_dmc_cmd; |
| 420 | reg [3:0] smx_dmc_cmd_status; |
| 421 | reg [63:0] smx_dmc_addr; |
| 422 | reg [13:0] smx_dmc_len; |
| 423 | reg [5:0] smx_dmc_xid; |
| 424 | reg [1:0] smx_dmc_port; |
| 425 | reg [4:0] smx_dmc_dma; |
| 426 | reg [7:0] smx_dmc_client; |
| 427 | |
| 428 | // wire [63:0] smx_dmc_ack_addr= smx_dmc_addr; |
| 429 | // wire [13:0] smx_dmc_ack_len= smx_dmc_len; |
| 430 | // wire [1:0] smx_dmc_ack_port= smx_dmc_port; |
| 431 | |
| 432 | // cc registered to prevent ghosting effect with response bus 062905 |
| 433 | // wire [7:0] smx_dmc_ack_cmd= smx_dmc_cmd; |
| 434 | // wire [3:0] smx_dmc_ack_cmd_status= smx_dmc_cmd_status; |
| 435 | // wire [5:0] smx_dmc_ack_xid= smx_dmc_xid; |
| 436 | // wire [4:0] smx_dmc_ack_dma= smx_dmc_dma; |
| 437 | // wire [7:0] smx_dmc_ack_client= smx_dmc_client; |
| 438 | |
| 439 | reg [6:0] resp_len_n; |
| 440 | |
| 441 | reg [7:0] smx_dmc_ack_cmd; |
| 442 | reg [3:0] smx_dmc_ack_cmd_status; |
| 443 | reg [5:0] smx_dmc_ack_xid; |
| 444 | reg [4:0] smx_dmc_ack_dma; |
| 445 | reg [7:0] smx_dmc_ack_client; |
| 446 | |
| 447 | always @(posedge clk) begin |
| 448 | if(ld_dmc_n & smx_dmc_ack_rdy_n) begin // cc qualify to smx_dmc_ack_rdy_n 062905 |
| 449 | smx_dmc_ack_cmd <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_cmd : procflag_cmd; |
| 450 | smx_dmc_ack_cmd_status <= `SMX_PD (rst_serve_tohdl_n)? 4'hf : 4'h0; |
| 451 | smx_dmc_ack_xid <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_xid : procflag_xid; |
| 452 | smx_dmc_ack_dma <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_dma : procflag_dma; |
| 453 | smx_dmc_ack_client <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_client : procflag_client; |
| 454 | end |
| 455 | end |
| 456 | |
| 457 | always @(posedge clk) begin |
| 458 | if(ld_dmc_n & smx_dmc_rdy_n) begin // cc qualify to smx_dmc_rdy_n 062905 |
| 459 | smx_dmc_cmd <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_cmd : procflag_cmd; |
| 460 | smx_dmc_cmd_status <= `SMX_PD (rst_serve_tohdl_n)? 4'hf : 4'h0; |
| 461 | smx_dmc_addr <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_addr : procflag_addr; |
| 462 | smx_dmc_len <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_len : {7'h0, resp_len_n}; |
| 463 | smx_dmc_xid <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_xid : procflag_xid; |
| 464 | smx_dmc_port <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_port : procflag_port; |
| 465 | smx_dmc_dma <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_dma : procflag_dma; |
| 466 | smx_dmc_client <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_client : procflag_client; |
| 467 | |
| 468 | // also make own copy of non dmc |
| 469 | // make not need this copy ??? |
| 470 | // procflag_sop_line_en_r<= `SMX_PD procflag_sop_line_en; |
| 471 | // procflag_eop_line_en_r<= `SMX_PD procflag_eop_line_en; |
| 472 | // procflag_sop_byte_en_r<= `SMX_PD procflag_sop_byte_en; |
| 473 | // procflag_eop_byte_en_r<= `SMX_PD procflag_eop_byte_en; |
| 474 | // procflag_err_r<= `SMX_PD procflag_err; |
| 475 | // procflag_rd_r<= `SMX_PD procflag_rd; |
| 476 | // procflag_with_data_r<= `SMX_PD procflag_with_data; |
| 477 | // procflag_xcomp_r<= `SMX_PD procflag_xcomp; |
| 478 | // procflag_sop_r<= `SMX_PD procflag_sop; |
| 479 | // procflag_eop_r<= `SMX_PD procflag_eop; |
| 480 | end |
| 481 | end |
| 482 | |
| 483 | reg [3:0] dvflag_line_en_n; |
| 484 | always @ (/*AUTOSENSE*/procflag_eop or procflag_eop_line_en |
| 485 | or procflag_sop or procflag_sop_line_en) begin |
| 486 | case({procflag_sop, procflag_eop}) |
| 487 | 2'b00: dvflag_line_en_n= 4'hf; // mid of pkt |
| 488 | 2'b01: dvflag_line_en_n= procflag_eop_line_en; // rcving eop |
| 489 | 2'b10: dvflag_line_en_n= procflag_sop_line_en; // rcving sop |
| 490 | 2'b11: dvflag_line_en_n= (procflag_sop_line_en & procflag_eop_line_en); // single 64B |
| 491 | endcase |
| 492 | end |
| 493 | |
| 494 | reg [3:0] dvflag_sop_pos_n; |
| 495 | always @ (/*AUTOSENSE*/procflag_sop_line_en) begin |
| 496 | dvflag_sop_pos_n= 4'h0; |
| 497 | case(procflag_sop_line_en) |
| 498 | 4'b1111: dvflag_sop_pos_n= 4'b0001; |
| 499 | 4'b1110: dvflag_sop_pos_n= 4'b0010; |
| 500 | 4'b1100: dvflag_sop_pos_n= 4'b0100; |
| 501 | 4'b1000: dvflag_sop_pos_n= 4'b1000; |
| 502 | default: dvflag_sop_pos_n= 4'b0000; |
| 503 | endcase |
| 504 | end |
| 505 | |
| 506 | reg [3:0] dvflag_eop_pos_n; |
| 507 | always @ (/*AUTOSENSE*/procflag_eop_line_en) begin |
| 508 | dvflag_eop_pos_n= 4'h0; |
| 509 | case(procflag_eop_line_en) |
| 510 | 4'b1111: dvflag_eop_pos_n= 4'b1000; |
| 511 | 4'b0111: dvflag_eop_pos_n= 4'b0100; |
| 512 | 4'b0011: dvflag_eop_pos_n= 4'b0010; |
| 513 | 4'b0001: dvflag_eop_pos_n= 4'b0001; |
| 514 | default: dvflag_eop_pos_n= 4'b0000; |
| 515 | endcase |
| 516 | end |
| 517 | |
| 518 | wire [3:0] dvflag_xcomp_n; |
| 519 | assign dvflag_xcomp_n[3]= procflag_xcomp & dvflag_line_en_n[3]; |
| 520 | assign dvflag_xcomp_n[2]= procflag_xcomp && (dvflag_line_en_n[3:2]==2'b01); |
| 521 | assign dvflag_xcomp_n[1]= procflag_xcomp && (dvflag_line_en_n[3:1]==3'b001); |
| 522 | assign dvflag_xcomp_n[0]= (procflag_xcomp && (dvflag_line_en_n[3:0]==4'b0001)) || // rd |
| 523 | (~procflag_rd && procflag_xcomp); // wr |
| 524 | |
| 525 | reg [1:0] dvflag_with_data; |
| 526 | reg [3:0] dvflag_line_en; |
| 527 | reg [3:0] dvflag_sop_pos; // indicate first data line position |
| 528 | reg [3:0] dvflag_eop_pos; // indicate last data line position |
| 529 | reg [15:0] dvflag_sop_byte_en; // use this for 'first' data line |
| 530 | reg [15:0] dvflag_eop_byte_en; // use this for 'last' data line |
| 531 | reg [7:0] dvflag_client; |
| 532 | reg [3:0] dvflag_xcomp; |
| 533 | reg [3:0] dvflag_status; |
| 534 | |
| 535 | reg [1:0] early_dvflag_with_data; // 1= rd (data,dv also sio dq) , |
| 536 | // 0= wr/rderr (sio dq only) |
| 537 | reg [3:0] early_dvflag_line_en; |
| 538 | reg [3:0] early_dvflag_sop_pos; // indicate first data line position |
| 539 | reg [3:0] early_dvflag_eop_pos; // indicate last data line position |
| 540 | reg [15:0] early_dvflag_sop_byte_en; // use this for 'first' data line |
| 541 | reg [15:0] early_dvflag_eop_byte_en; // use this for 'last' data line |
| 542 | reg [7:0] early_dvflag_client; |
| 543 | reg [3:0] early_dvflag_xcomp; |
| 544 | reg [3:0] early_dvflag_status; |
| 545 | |
| 546 | |
| 547 | wire procflag_err_0_cond= proc_tid_is_dirty? 1'b1 : procflag_err[0]; |
| 548 | |
| 549 | always @(posedge clk) begin |
| 550 | if(rst_procflag_n) begin // make early dvflag_xxx |
| 551 | early_dvflag_with_data<= `SMX_PD {procflag_rd, procflag_with_data}; |
| 552 | early_dvflag_line_en<= `SMX_PD dvflag_line_en_n; |
| 553 | // if rcving sop, sop at line X, else 0 |
| 554 | early_dvflag_sop_pos<= `SMX_PD (procflag_sop)? dvflag_sop_pos_n : 4'h0; |
| 555 | // if rcving eop, eop at line X, else 0 |
| 556 | early_dvflag_eop_pos<= `SMX_PD (procflag_eop)? dvflag_eop_pos_n : 4'h0; |
| 557 | // if 1 in sop/eop_pos , use sop/eop_byte_en |
| 558 | early_dvflag_sop_byte_en<= `SMX_PD decode_sop_16b_byte_en_little(procflag_sop_byte_en); |
| 559 | early_dvflag_eop_byte_en<= `SMX_PD decode_eop_16b_byte_en_little(procflag_eop_byte_en); |
| 560 | early_dvflag_xcomp<= `SMX_PD dvflag_xcomp_n; |
| 561 | early_dvflag_status<= `SMX_PD {1'b0, procflag_err[2:1],procflag_err_0_cond}; // extract from procflag_err |
| 562 | early_dvflag_client<= `SMX_PD procflag_client; |
| 563 | end |
| 564 | if(set_dvflag_n) begin |
| 565 | dvflag_with_data<= `SMX_PD (cmdl_tohdl_ack_n)? {~tohdl_cmdl_xid[5], 1'b0} : |
| 566 | early_dvflag_with_data; |
| 567 | dvflag_line_en<= `SMX_PD (cmdl_tohdl_ack_n)? 4'h0 : early_dvflag_line_en; |
| 568 | dvflag_sop_pos<= `SMX_PD (cmdl_tohdl_ack_n)? 4'h0: early_dvflag_sop_pos; |
| 569 | dvflag_eop_pos<= `SMX_PD (cmdl_tohdl_ack_n)? 4'h0: early_dvflag_eop_pos; |
| 570 | dvflag_sop_byte_en<= `SMX_PD (cmdl_tohdl_ack_n)? 16'h0: early_dvflag_sop_byte_en; |
| 571 | dvflag_eop_byte_en<= `SMX_PD (cmdl_tohdl_ack_n)? 16'h0: early_dvflag_eop_byte_en; |
| 572 | dvflag_xcomp<= `SMX_PD (cmdl_tohdl_ack_n)? 4'h1 : early_dvflag_xcomp; |
| 573 | dvflag_status<= `SMX_PD (cmdl_tohdl_ack_n)? 4'h0 : early_dvflag_status; |
| 574 | dvflag_client<= `SMX_PD (cmdl_tohdl_ack_n)? tohdl_cmdl_client : early_dvflag_client; |
| 575 | end |
| 576 | /* |
| 577 | ??? note if need to have bubble between accept and dv, |
| 578 | need to put this back; right now, dv assert immediate |
| 579 | after accpet ??? |
| 580 | or simply hard code dv_idle to 0; |
| 581 | |
| 582 | if(set_dvflag_n) begin // right hand side all xx_r; gen dvflag_xx late |
| 583 | // important!! |
| 584 | // remember to chg dvflag_xx_n above to use _r if wanna use this |
| 585 | // line_en_n, eop/sop_pos_n.... |
| 586 | // important!! |
| 587 | dvflag_with_data<= `SMX_PD procflag_with_data_r; |
| 588 | dvflag_line_en<= `SMX_PD dvflag_line_en_n; |
| 589 | dvflag_sop_pos<= `SMX_PD (procflag_sop_r)? dvflag_sop_pos_n : 4'h0; |
| 590 | dvflag_eop_pos<= `SMX_PD (procflag_eop_r)? dvflag_eop_pos_n : 4'h0; |
| 591 | dvflag_sop_byte_en<= `SMX_PD decode_sop_16b_byte_en_big(procflag_sop_byte_en_r); |
| 592 | dvflag_eop_byte_en<= `SMX_PD decode_eop_16b_byte_en_big(procflag_eop_byte_en_r); |
| 593 | dvflag_xcomp<= `SMX_PD procflag_xcomp_r; |
| 594 | dvflag_status<= `SMX_PD 4'h0; // extract from procflag_err ???; |
| 595 | dvflag_client<= `SMX_PD smx_dmc_client; |
| 596 | end |
| 597 | */ |
| 598 | end |
| 599 | |
| 600 | // adj resp_len to be actual len |
| 601 | // not sure if timing can be a problem ?? |
| 602 | |
| 603 | wire [1:0] sum_line_en_n= {1'b0, dvflag_line_en_n[0]} + |
| 604 | {1'b0, dvflag_line_en_n[1]} + |
| 605 | {1'b0, dvflag_line_en_n[2]} + |
| 606 | {1'b0, dvflag_line_en_n[3]}; |
| 607 | reg [6:0] sum_line_en_in_byte_n; // line_en in bytes |
| 608 | |
| 609 | always @(/*AUTOSENSE*/sum_line_en_n) begin |
| 610 | case(sum_line_en_n) |
| 611 | 2'h0: sum_line_en_in_byte_n= 7'd64; |
| 612 | 2'h1: sum_line_en_in_byte_n= 7'd16; |
| 613 | 2'h2: sum_line_en_in_byte_n= 7'd32; |
| 614 | 2'h3: sum_line_en_in_byte_n= 7'd48; |
| 615 | default: sum_line_en_in_byte_n= 7'd64; |
| 616 | endcase |
| 617 | end |
| 618 | |
| 619 | //wire [4:0] sop_firstline_in_byte_n= 5'd16 - {1'b0, procflag_sop_byte_en}; |
| 620 | wire [4:0] sop_firstline_notuse_in_byte_n= {1'b0, procflag_sop_byte_en}; |
| 621 | wire [4:0] eop_lastline_in_byte_n= (|procflag_eop_byte_en)? |
| 622 | {1'b0, procflag_eop_byte_en} : 5'd16; |
| 623 | wire [4:0] eop_lastline_notuse_in_byte_n= 5'd16 - eop_lastline_in_byte_n; |
| 624 | |
| 625 | always @(/*AUTOSENSE*/eop_lastline_notuse_in_byte_n or procflag_eop |
| 626 | or procflag_sop or sop_firstline_notuse_in_byte_n |
| 627 | or sum_line_en_in_byte_n) begin |
| 628 | case({procflag_sop, procflag_eop}) |
| 629 | 2'h0: resp_len_n= sum_line_en_in_byte_n; // mid resp |
| 630 | 2'h1: resp_len_n= sum_line_en_in_byte_n - {2'h0, eop_lastline_notuse_in_byte_n}; // eop |
| 631 | 2'h2: resp_len_n= sum_line_en_in_byte_n - {2'h0, sop_firstline_notuse_in_byte_n}; // sop |
| 632 | 2'h3: resp_len_n= sum_line_en_in_byte_n - {2'h0, sop_firstline_notuse_in_byte_n} |
| 633 | - {2'h0, eop_lastline_notuse_in_byte_n}; |
| 634 | // sop/eop in this resp chunk |
| 635 | default: resp_len_n= 7'd64; |
| 636 | endcase |
| 637 | end |
| 638 | |
| 639 | endmodule |
| 640 | |
| 641 | |
| 642 | |
| 643 | |
| 644 | |