| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: niu_pio_virt_decode.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 | /*%W% %G%*/ |
| 36 | |
| 37 | /***************************************************************** |
| 38 | * |
| 39 | * File Name : niu_pio_virt_decode.v |
| 40 | * Author Name : Maya Suresh |
| 41 | * Description : Virtualization Decoder |
| 42 | * |
| 43 | * Parent Module: niu_pio_regs.v |
| 44 | * Child Module: |
| 45 | * Interface Mod: |
| 46 | * Date Created : 04/25/05 |
| 47 | * |
| 48 | * Copyright (c) 2020, Sun Microsystems, Inc. |
| 49 | * Sun Proprietary and Confidential |
| 50 | * |
| 51 | * Modification : |
| 52 | * |
| 53 | ****************************************************************/ |
| 54 | |
| 55 | module niu_pio_virt_decode ( |
| 56 | // Outputs |
| 57 | virt_addr, pio_virt_sel_ok, fflp_virt_sel_ok, |
| 58 | dma_virt_sel_ok, |
| 59 | // Inputs |
| 60 | addr, fc0_v, fc1_v, fc2_v, fc3_v |
| 61 | ); |
| 62 | |
| 63 | output [26:0] virt_addr ; |
| 64 | output pio_virt_sel_ok ; |
| 65 | output fflp_virt_sel_ok ; |
| 66 | output dma_virt_sel_ok; |
| 67 | |
| 68 | input [26:0] addr ; |
| 69 | input fc0_v ; |
| 70 | input fc1_v ; |
| 71 | input fc2_v ; |
| 72 | input fc3_v ; |
| 73 | |
| 74 | reg [26:0] virt_addr ; |
| 75 | reg pio_virt_sel_ok ; |
| 76 | reg fflp_virt_sel_ok ; |
| 77 | reg dma_virt_sel_ok; |
| 78 | |
| 79 | always @ (addr or |
| 80 | fc0_v or |
| 81 | fc1_v or |
| 82 | fc2_v or |
| 83 | fc3_v ) |
| 84 | begin |
| 85 | virt_addr[26:0] = 27'b0; |
| 86 | pio_virt_sel_ok = 1'b0 ; |
| 87 | fflp_virt_sel_ok = 1'b0 ; |
| 88 | dma_virt_sel_ok = 1'b0 ; |
| 89 | |
| 90 | // Function Zero Virtualization |
| 91 | if (fc0_v) // Function Zero Virtualization Decode |
| 92 | begin |
| 93 | |
| 94 | // Code for DMA Virtualization |
| 95 | if (addr[23:13] == 11'b0000_0000_000) |
| 96 | begin |
| 97 | virt_addr[26:0] = addr[26:0]; |
| 98 | dma_virt_sel_ok = 1'b1 ; |
| 99 | end |
| 100 | if (addr[23:13] == 11'b0000_0000_010) |
| 101 | begin |
| 102 | virt_addr[26:0] = addr[26:0]; |
| 103 | dma_virt_sel_ok = 1'b1 ; |
| 104 | end |
| 105 | // END |
| 106 | |
| 107 | if (addr[15:8] == 8'b0010_0000) |
| 108 | begin |
| 109 | virt_addr[23:0] = {8'b1000_0000,addr[7:5],8'b0,addr[4:0]}; |
| 110 | virt_addr[26:24]= addr[26:24]; |
| 111 | pio_virt_sel_ok = 1'b1 ; |
| 112 | end |
| 113 | |
| 114 | if (addr[15:8] == 8'b0110_0000) |
| 115 | begin |
| 116 | virt_addr[23:0] = {8'b1000_0001,addr[7:5],8'b0,addr[4:0]}; |
| 117 | virt_addr[26:24]= addr[26:24]; |
| 118 | pio_virt_sel_ok = 1'b1 ; |
| 119 | end |
| 120 | |
| 121 | if (addr[15:0] == 16'b0010_0001_0000_0000) |
| 122 | begin |
| 123 | virt_addr[23:0] = {4'b0011,20'b0}; |
| 124 | virt_addr[26:24]= addr[26:24]; |
| 125 | fflp_virt_sel_ok = 1'b1 ; |
| 126 | end |
| 127 | if (addr[15:0] == 16'b0010_0001_0000_1000) |
| 128 | begin |
| 129 | virt_addr[23:0] = {4'b0011,16'b0,4'b1000}; |
| 130 | virt_addr[26:24]= addr[26:24]; |
| 131 | fflp_virt_sel_ok = 1'b1 ; |
| 132 | end |
| 133 | if (addr[15:0] == 16'b0010_0001_0001_0000) |
| 134 | begin |
| 135 | virt_addr[23:0] = {4'b0011,12'b0,4'b0001,4'b0000}; |
| 136 | virt_addr[26:24]= addr[26:24]; |
| 137 | fflp_virt_sel_ok = 1'b1 ; |
| 138 | end |
| 139 | |
| 140 | if (addr[15:0] == 16'b0110_0001_0000_0000) |
| 141 | begin |
| 142 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0010,12'b0}; |
| 143 | virt_addr[26:24]= addr[26:24]; |
| 144 | fflp_virt_sel_ok = 1'b1 ; |
| 145 | end |
| 146 | if (addr[15:0] == 16'b0110_0001_0000_1000) |
| 147 | begin |
| 148 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0010,8'b0,4'b1000}; |
| 149 | virt_addr[26:24]= addr[26:24]; |
| 150 | fflp_virt_sel_ok = 1'b1 ; |
| 151 | end |
| 152 | if (addr[15:0] == 16'b0110_0001_0001_0000) |
| 153 | begin |
| 154 | fflp_virt_sel_ok = 1'b1 ; |
| 155 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0010,4'b0000,4'b0001,4'b0000}; |
| 156 | virt_addr[26:24]= addr[26:24]; |
| 157 | end |
| 158 | end |
| 159 | |
| 160 | // Function One Virtualization |
| 161 | if (fc1_v) // Function Zero Virtualization Decode |
| 162 | begin |
| 163 | |
| 164 | // Code for DMA Virtualization |
| 165 | if (addr[23:13] == 11'b0000_0000_000) |
| 166 | begin |
| 167 | virt_addr[26:0] = addr[26:0]; |
| 168 | dma_virt_sel_ok = 1'b1 ; |
| 169 | end |
| 170 | if (addr[23:13] == 11'b0000_0000_010) |
| 171 | begin |
| 172 | virt_addr[26:0] = addr[26:0]; |
| 173 | dma_virt_sel_ok = 1'b1 ; |
| 174 | end |
| 175 | // END |
| 176 | |
| 177 | if (addr[15:8] == 8'b0010_0000) |
| 178 | begin |
| 179 | virt_addr[23:0] = {8'b1000_0010,addr[7:5],8'b0,addr[4:0]}; |
| 180 | virt_addr[26:24]= addr[26:24]; |
| 181 | pio_virt_sel_ok = 1'b1 ; |
| 182 | end |
| 183 | if (addr[15:8] == 8'b0110_0000) |
| 184 | begin |
| 185 | virt_addr[23:0] = {8'b1000_0011,addr[7:5],8'b0,addr[4:0]}; |
| 186 | virt_addr[26:24]= addr[26:24]; |
| 187 | pio_virt_sel_ok = 1'b1 ; |
| 188 | end |
| 189 | |
| 190 | if (addr[15:0] == 16'b0010_0001_0000_0000) |
| 191 | begin |
| 192 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0100,8'b0,4'b0000}; |
| 193 | virt_addr[26:24]= addr[26:24]; |
| 194 | fflp_virt_sel_ok = 1'b1 ; |
| 195 | end |
| 196 | if (addr[15:0] == 16'b0010_0001_0000_1000) |
| 197 | begin |
| 198 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0100,8'b0,4'b1000}; |
| 199 | virt_addr[26:24]= addr[26:24]; |
| 200 | fflp_virt_sel_ok = 1'b1 ; |
| 201 | end |
| 202 | if (addr[15:0] == 16'b0010_0001_0001_0000) |
| 203 | begin |
| 204 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0100,4'b0,4'b0001,4'b0000}; |
| 205 | virt_addr[26:24]= addr[26:24]; |
| 206 | fflp_virt_sel_ok = 1'b1 ; |
| 207 | end |
| 208 | |
| 209 | if (addr[15:0] == 16'b0110_0001_0000_0000) |
| 210 | begin |
| 211 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0110,8'b0,4'b0000}; |
| 212 | virt_addr[26:24]= addr[26:24]; |
| 213 | fflp_virt_sel_ok = 1'b1 ; |
| 214 | end |
| 215 | if (addr[15:0] == 16'b0110_0001_0000_1000) |
| 216 | begin |
| 217 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0110,8'b0,4'b1000}; |
| 218 | virt_addr[26:24]= addr[26:24]; |
| 219 | fflp_virt_sel_ok = 1'b1 ; |
| 220 | end |
| 221 | if (addr[15:0] == 16'b0110_0001_0001_0000) |
| 222 | begin |
| 223 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0110,4'b0,4'b0001,4'b0000}; |
| 224 | virt_addr[26:24]= addr[26:24]; |
| 225 | fflp_virt_sel_ok = 1'b1 ; |
| 226 | end |
| 227 | end |
| 228 | |
| 229 | // Function Two Virtualization |
| 230 | if (fc2_v) // Function Zero Virtualization Decode |
| 231 | begin |
| 232 | |
| 233 | // Code for DMA Virtualization |
| 234 | if (addr[23:13] == 11'b0000_0000_000) |
| 235 | begin |
| 236 | virt_addr[26:0] = addr[26:0]; |
| 237 | dma_virt_sel_ok = 1'b1 ; |
| 238 | end |
| 239 | if (addr[23:13] == 11'b0000_0000_010) |
| 240 | begin |
| 241 | virt_addr[26:0] = addr[26:0]; |
| 242 | dma_virt_sel_ok = 1'b1 ; |
| 243 | end |
| 244 | // END |
| 245 | |
| 246 | if (addr[15:8] == 8'b0010_0000) |
| 247 | begin |
| 248 | virt_addr[23:0] = {8'b1000_0100,addr[7:5],8'b0,addr[4:0]}; |
| 249 | virt_addr[26:24]= addr[26:24]; |
| 250 | pio_virt_sel_ok = 1'b1 ; |
| 251 | end |
| 252 | if (addr[15:8] == 8'b0110_0000) |
| 253 | begin |
| 254 | virt_addr[23:0] = {8'b1000_0101,addr[7:5],8'b0,addr[4:0]}; |
| 255 | virt_addr[26:24]= addr[26:24]; |
| 256 | pio_virt_sel_ok = 1'b1 ; |
| 257 | end |
| 258 | |
| 259 | if (addr[15:0] == 16'b0010_0001_0000_0000) |
| 260 | begin |
| 261 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1000,8'b0,4'b0000}; |
| 262 | virt_addr[26:24]= addr[26:24]; |
| 263 | fflp_virt_sel_ok = 1'b1 ; |
| 264 | end |
| 265 | if (addr[15:0] == 16'b0010_0001_0000_1000) |
| 266 | begin |
| 267 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1000,8'b0,4'b1000}; |
| 268 | virt_addr[26:24]= addr[26:24]; |
| 269 | fflp_virt_sel_ok = 1'b1 ; |
| 270 | end |
| 271 | if (addr[15:0] == 16'b0010_0001_0001_0000) |
| 272 | begin |
| 273 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1000,4'b0,4'b0001,4'b0000}; |
| 274 | virt_addr[26:24]= addr[26:24]; |
| 275 | fflp_virt_sel_ok = 1'b1 ; |
| 276 | end |
| 277 | |
| 278 | if (addr[15:0] == 16'b0110_0001_0000_0000) |
| 279 | begin |
| 280 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1010,8'b0,4'b0000}; |
| 281 | virt_addr[26:24]= addr[26:24]; |
| 282 | fflp_virt_sel_ok = 1'b1 ; |
| 283 | end |
| 284 | if (addr[15:0] == 16'b0110_0001_0000_1000) |
| 285 | begin |
| 286 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1010,8'b0,4'b1000}; |
| 287 | virt_addr[26:24]= addr[26:24]; |
| 288 | fflp_virt_sel_ok = 1'b1 ; |
| 289 | end |
| 290 | if (addr[15:0] == 16'b0110_0001_0001_0000) |
| 291 | begin |
| 292 | fflp_virt_sel_ok = 1'b1 ; |
| 293 | virt_addr[26:24]= addr[26:24]; |
| 294 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1010,4'b0,4'b0001,4'b0000}; |
| 295 | end |
| 296 | end |
| 297 | |
| 298 | // Function Three Virtualization |
| 299 | if (fc3_v) // Function Zero Virtualization Decode |
| 300 | begin |
| 301 | |
| 302 | // Code for DMA Virtualization |
| 303 | if (addr[23:13] == 11'b0000_0000_000) |
| 304 | begin |
| 305 | virt_addr[26:0] = addr[26:0]; |
| 306 | dma_virt_sel_ok = 1'b1 ; |
| 307 | end |
| 308 | if (addr[23:13] == 11'b0000_0000_010) |
| 309 | begin |
| 310 | virt_addr[26:0] = addr[26:0]; |
| 311 | dma_virt_sel_ok = 1'b1 ; |
| 312 | end |
| 313 | // END |
| 314 | |
| 315 | if (addr[15:8] == 8'b0010_0000) |
| 316 | begin |
| 317 | virt_addr[23:0] = {8'b1000_0110,addr[7:5],8'b0,addr[4:0]}; |
| 318 | virt_addr[26:24]= addr[26:24]; |
| 319 | pio_virt_sel_ok = 1'b1 ; |
| 320 | end |
| 321 | if (addr[15:8] == 8'b0110_0000) |
| 322 | begin |
| 323 | virt_addr[23:0] = {8'b1000_0111,addr[7:5],8'b0,addr[4:0]}; |
| 324 | virt_addr[26:24]= addr[26:24]; |
| 325 | pio_virt_sel_ok = 1'b1 ; |
| 326 | end |
| 327 | |
| 328 | if (addr[15:0] == 16'b0010_0001_0000_0000) |
| 329 | begin |
| 330 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1100,8'b0,4'b0000}; |
| 331 | virt_addr[26:24]= addr[26:24]; |
| 332 | fflp_virt_sel_ok = 1'b1 ; |
| 333 | end |
| 334 | if (addr[15:0] == 16'b0010_0001_0000_1000) |
| 335 | begin |
| 336 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1100,8'b0,4'b1000}; |
| 337 | virt_addr[26:24]= addr[26:24]; |
| 338 | fflp_virt_sel_ok = 1'b1 ; |
| 339 | end |
| 340 | if (addr[15:0] == 16'b0010_0001_0001_0000) |
| 341 | begin |
| 342 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1100,4'b0,4'b0001,4'b0000}; |
| 343 | virt_addr[26:24]= addr[26:24]; |
| 344 | fflp_virt_sel_ok = 1'b1 ; |
| 345 | end |
| 346 | |
| 347 | if (addr[15:0] == 16'b0110_0001_0000_0000) |
| 348 | begin |
| 349 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1110,8'b0,4'b0000}; |
| 350 | virt_addr[26:24]= addr[26:24]; |
| 351 | fflp_virt_sel_ok = 1'b1 ; |
| 352 | end |
| 353 | if (addr[15:0] == 16'b0110_0001_0000_1000) |
| 354 | begin |
| 355 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1110,8'b0,4'b1000}; |
| 356 | virt_addr[26:24]= addr[26:24]; |
| 357 | fflp_virt_sel_ok = 1'b1 ; |
| 358 | end |
| 359 | if (addr[15:0] == 16'b0110_0001_0001_0000) |
| 360 | begin |
| 361 | fflp_virt_sel_ok = 1'b1 ; |
| 362 | virt_addr[26:24]= addr[26:24]; |
| 363 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1110,4'b0,4'b0001,4'b0000}; |
| 364 | end |
| 365 | end |
| 366 | end |
| 367 | |
| 368 | endmodule // niu_pio_virt_decode |
| 369 | |