Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/mips/nlm/bus_space_rmi.c
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1 /* 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright 2003-2011 Netlogic Microsystems (Netlogic). All rights 5 * reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are 9 * met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY Netlogic Microsystems ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * NETLOGIC_BSD */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/kernel.h> 39 #include <sys/endian.h> 40 #include <sys/malloc.h> 41 #include <sys/ktr.h> 42 43 #include <vm/vm.h> 44 #include <vm/pmap.h> 45 #include <vm/vm_kern.h> 46 #include <vm/vm_extern.h> 47 48 #include <machine/bus.h> 49 #include <machine/cache.h> 50 51 static int 52 rmi_bus_space_map(void *t, bus_addr_t addr, 53 bus_size_t size, int flags, 54 bus_space_handle_t *bshp); 55 56 static void 57 rmi_bus_space_unmap(void *t, bus_space_handle_t bsh, 58 bus_size_t size); 59 60 static int 61 rmi_bus_space_subregion(void *t, 62 bus_space_handle_t bsh, 63 bus_size_t offset, bus_size_t size, 64 bus_space_handle_t *nbshp); 65 66 static u_int8_t 67 rmi_bus_space_read_1(void *t, 68 bus_space_handle_t handle, 69 bus_size_t offset); 70 71 static u_int16_t 72 rmi_bus_space_read_2(void *t, 73 bus_space_handle_t handle, 74 bus_size_t offset); 75 76 static u_int32_t 77 rmi_bus_space_read_4(void *t, 78 bus_space_handle_t handle, 79 bus_size_t offset); 80 81 static void 82 rmi_bus_space_read_multi_1(void *t, 83 bus_space_handle_t handle, 84 bus_size_t offset, u_int8_t *addr, 85 size_t count); 86 87 static void 88 rmi_bus_space_read_multi_2(void *t, 89 bus_space_handle_t handle, 90 bus_size_t offset, u_int16_t *addr, 91 size_t count); 92 93 static void 94 rmi_bus_space_read_multi_4(void *t, 95 bus_space_handle_t handle, 96 bus_size_t offset, u_int32_t *addr, 97 size_t count); 98 99 static void 100 rmi_bus_space_read_region_1(void *t, 101 bus_space_handle_t bsh, 102 bus_size_t offset, u_int8_t *addr, 103 size_t count); 104 105 static void 106 rmi_bus_space_read_region_2(void *t, 107 bus_space_handle_t bsh, 108 bus_size_t offset, u_int16_t *addr, 109 size_t count); 110 111 static void 112 rmi_bus_space_read_region_4(void *t, 113 bus_space_handle_t bsh, 114 bus_size_t offset, u_int32_t *addr, 115 size_t count); 116 117 static void 118 rmi_bus_space_write_1(void *t, 119 bus_space_handle_t handle, 120 bus_size_t offset, u_int8_t value); 121 122 static void 123 rmi_bus_space_write_2(void *t, 124 bus_space_handle_t handle, 125 bus_size_t offset, u_int16_t value); 126 127 static void 128 rmi_bus_space_write_4(void *t, 129 bus_space_handle_t handle, 130 bus_size_t offset, u_int32_t value); 131 132 static void 133 rmi_bus_space_write_multi_1(void *t, 134 bus_space_handle_t handle, 135 bus_size_t offset, 136 const u_int8_t *addr, 137 size_t count); 138 139 static void 140 rmi_bus_space_write_multi_2(void *t, 141 bus_space_handle_t handle, 142 bus_size_t offset, 143 const u_int16_t *addr, 144 size_t count); 145 146 static void 147 rmi_bus_space_write_multi_4(void *t, 148 bus_space_handle_t handle, 149 bus_size_t offset, 150 const u_int32_t *addr, 151 size_t count); 152 153 static void 154 rmi_bus_space_write_region_2(void *t, 155 bus_space_handle_t bsh, 156 bus_size_t offset, 157 const u_int16_t *addr, 158 size_t count); 159 160 static void 161 rmi_bus_space_write_region_4(void *t, 162 bus_space_handle_t bsh, 163 bus_size_t offset, 164 const u_int32_t *addr, 165 size_t count); 166 167 static void 168 rmi_bus_space_set_region_2(void *t, 169 bus_space_handle_t bsh, 170 bus_size_t offset, u_int16_t value, 171 size_t count); 172 static void 173 rmi_bus_space_set_region_4(void *t, 174 bus_space_handle_t bsh, 175 bus_size_t offset, u_int32_t value, 176 size_t count); 177 178 static void 179 rmi_bus_space_barrier(void *tag __unused, bus_space_handle_t bsh __unused, 180 bus_size_t offset __unused, bus_size_t len __unused, int flags); 181 182 static void 183 rmi_bus_space_copy_region_2(void *t, 184 bus_space_handle_t bsh1, 185 bus_size_t off1, 186 bus_space_handle_t bsh2, 187 bus_size_t off2, size_t count); 188 189 u_int8_t 190 rmi_bus_space_read_stream_1(void *t, bus_space_handle_t handle, 191 bus_size_t offset); 192 193 static u_int16_t 194 rmi_bus_space_read_stream_2(void *t, bus_space_handle_t handle, 195 bus_size_t offset); 196 197 static u_int32_t 198 rmi_bus_space_read_stream_4(void *t, bus_space_handle_t handle, 199 bus_size_t offset); 200 static void 201 rmi_bus_space_read_multi_stream_1(void *t, 202 bus_space_handle_t handle, 203 bus_size_t offset, u_int8_t *addr, 204 size_t count); 205 206 static void 207 rmi_bus_space_read_multi_stream_2(void *t, 208 bus_space_handle_t handle, 209 bus_size_t offset, u_int16_t *addr, 210 size_t count); 211 212 static void 213 rmi_bus_space_read_multi_stream_4(void *t, 214 bus_space_handle_t handle, 215 bus_size_t offset, u_int32_t *addr, 216 size_t count); 217 218 void 219 rmi_bus_space_write_stream_1(void *t, bus_space_handle_t bsh, 220 bus_size_t offset, u_int8_t value); 221 static void 222 rmi_bus_space_write_stream_2(void *t, bus_space_handle_t handle, 223 bus_size_t offset, u_int16_t value); 224 225 static void 226 rmi_bus_space_write_stream_4(void *t, bus_space_handle_t handle, 227 bus_size_t offset, u_int32_t value); 228 229 static void 230 rmi_bus_space_write_multi_stream_1(void *t, 231 bus_space_handle_t handle, 232 bus_size_t offset, 233 const u_int8_t *addr, 234 size_t count); 235 static void 236 rmi_bus_space_write_multi_stream_2(void *t, 237 bus_space_handle_t handle, 238 bus_size_t offset, 239 const u_int16_t *addr, 240 size_t count); 241 242 static void 243 rmi_bus_space_write_multi_stream_4(void *t, 244 bus_space_handle_t handle, 245 bus_size_t offset, 246 const u_int32_t *addr, 247 size_t count); 248 249 #define TODO() printf("XLP bus space: '%s' unimplemented\n", __func__) 250 251 static struct bus_space local_rmi_bus_space = { 252 /* cookie */ 253 (void *)0, 254 255 /* mapping/unmapping */ 256 rmi_bus_space_map, 257 rmi_bus_space_unmap, 258 rmi_bus_space_subregion, 259 260 /* allocation/deallocation */ 261 NULL, 262 NULL, 263 264 /* barrier */ 265 rmi_bus_space_barrier, 266 267 /* read (single) */ 268 rmi_bus_space_read_1, 269 rmi_bus_space_read_2, 270 rmi_bus_space_read_4, 271 NULL, 272 273 /* read multiple */ 274 rmi_bus_space_read_multi_1, 275 rmi_bus_space_read_multi_2, 276 rmi_bus_space_read_multi_4, 277 NULL, 278 279 /* read region */ 280 rmi_bus_space_read_region_1, 281 rmi_bus_space_read_region_2, 282 rmi_bus_space_read_region_4, 283 NULL, 284 285 /* write (single) */ 286 rmi_bus_space_write_1, 287 rmi_bus_space_write_2, 288 rmi_bus_space_write_4, 289 NULL, 290 291 /* write multiple */ 292 rmi_bus_space_write_multi_1, 293 rmi_bus_space_write_multi_2, 294 rmi_bus_space_write_multi_4, 295 NULL, 296 297 /* write region */ 298 NULL, 299 rmi_bus_space_write_region_2, 300 rmi_bus_space_write_region_4, 301 NULL, 302 303 /* set multiple */ 304 NULL, 305 NULL, 306 NULL, 307 NULL, 308 309 /* set region */ 310 NULL, 311 rmi_bus_space_set_region_2, 312 rmi_bus_space_set_region_4, 313 NULL, 314 315 /* copy */ 316 NULL, 317 rmi_bus_space_copy_region_2, 318 NULL, 319 NULL, 320 321 /* read (single) stream */ 322 rmi_bus_space_read_stream_1, 323 rmi_bus_space_read_stream_2, 324 rmi_bus_space_read_stream_4, 325 NULL, 326 327 /* read multiple stream */ 328 rmi_bus_space_read_multi_stream_1, 329 rmi_bus_space_read_multi_stream_2, 330 rmi_bus_space_read_multi_stream_4, 331 NULL, 332 333 /* read region stream */ 334 rmi_bus_space_read_region_1, 335 rmi_bus_space_read_region_2, 336 rmi_bus_space_read_region_4, 337 NULL, 338 339 /* write (single) stream */ 340 rmi_bus_space_write_stream_1, 341 rmi_bus_space_write_stream_2, 342 rmi_bus_space_write_stream_4, 343 NULL, 344 345 /* write multiple stream */ 346 rmi_bus_space_write_multi_stream_1, 347 rmi_bus_space_write_multi_stream_2, 348 rmi_bus_space_write_multi_stream_4, 349 NULL, 350 351 /* write region stream */ 352 NULL, 353 rmi_bus_space_write_region_2, 354 rmi_bus_space_write_region_4, 355 NULL, 356 }; 357 358 /* generic bus_space tag */ 359 bus_space_tag_t rmi_bus_space = &local_rmi_bus_space; 360 361 /* 362 * Map a region of device bus space into CPU virtual address space. 363 */ 364 static int 365 rmi_bus_space_map(void *t __unused, bus_addr_t addr, 366 bus_size_t size __unused, int flags __unused, 367 bus_space_handle_t *bshp) 368 { 369 370 *bshp = MIPS_PHYS_TO_DIRECT_UNCACHED(addr); 371 return (0); 372 } 373 374 /* 375 * Unmap a region of device bus space. 376 */ 377 static void 378 rmi_bus_space_unmap(void *t __unused, bus_space_handle_t bsh __unused, 379 bus_size_t size __unused) 380 { 381 } 382 383 /* 384 * Get a new handle for a subregion of an already-mapped area of bus space. 385 */ 386 387 static int 388 rmi_bus_space_subregion(void *t __unused, bus_space_handle_t bsh, 389 bus_size_t offset, bus_size_t size __unused, 390 bus_space_handle_t *nbshp) 391 { 392 *nbshp = bsh + offset; 393 return (0); 394 } 395 396 /* 397 * Read a 1, 2, 4, or 8 byte quantity from bus space 398 * described by tag/handle/offset. 399 */ 400 401 static u_int8_t 402 rmi_bus_space_read_1(void *tag, bus_space_handle_t handle, 403 bus_size_t offset) 404 { 405 return (u_int8_t) (*(volatile u_int8_t *)(handle + offset)); 406 } 407 408 static u_int16_t 409 rmi_bus_space_read_2(void *tag, bus_space_handle_t handle, 410 bus_size_t offset) 411 { 412 return (u_int16_t)(*(volatile u_int16_t *)(handle + offset)); 413 } 414 415 static u_int32_t 416 rmi_bus_space_read_4(void *tag, bus_space_handle_t handle, 417 bus_size_t offset) 418 { 419 return (*(volatile u_int32_t *)(handle + offset)); 420 } 421 422 /* 423 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 424 * described by tag/handle/offset and copy into buffer provided. 425 */ 426 static void 427 rmi_bus_space_read_multi_1(void *tag, bus_space_handle_t handle, 428 bus_size_t offset, u_int8_t *addr, size_t count) 429 { 430 TODO(); 431 } 432 433 static void 434 rmi_bus_space_read_multi_2(void *tag, bus_space_handle_t handle, 435 bus_size_t offset, u_int16_t *addr, size_t count) 436 { 437 TODO(); 438 } 439 440 static void 441 rmi_bus_space_read_multi_4(void *tag, bus_space_handle_t handle, 442 bus_size_t offset, u_int32_t *addr, size_t count) 443 { 444 TODO(); 445 } 446 447 /* 448 * Write the 1, 2, 4, or 8 byte value `value' to bus space 449 * described by tag/handle/offset. 450 */ 451 452 static void 453 rmi_bus_space_write_1(void *tag, bus_space_handle_t handle, 454 bus_size_t offset, u_int8_t value) 455 { 456 *(volatile u_int8_t *)(handle + offset) = value; 457 } 458 459 static void 460 rmi_bus_space_write_2(void *tag, bus_space_handle_t handle, 461 bus_size_t offset, u_int16_t value) 462 { 463 *(volatile u_int16_t *)(handle + offset) = value; 464 } 465 466 static void 467 rmi_bus_space_write_4(void *tag, bus_space_handle_t handle, 468 bus_size_t offset, u_int32_t value) 469 { 470 *(volatile u_int32_t *)(handle + offset) = value; 471 } 472 473 /* 474 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer 475 * provided to bus space described by tag/handle/offset. 476 */ 477 478 static void 479 rmi_bus_space_write_multi_1(void *tag, bus_space_handle_t handle, 480 bus_size_t offset, const u_int8_t *addr, size_t count) 481 { 482 TODO(); 483 } 484 485 static void 486 rmi_bus_space_write_multi_2(void *tag, bus_space_handle_t handle, 487 bus_size_t offset, const u_int16_t *addr, size_t count) 488 { 489 TODO(); 490 } 491 492 static void 493 rmi_bus_space_write_multi_4(void *tag, bus_space_handle_t handle, 494 bus_size_t offset, const u_int32_t *addr, size_t count) 495 { 496 TODO(); 497 } 498 499 /* 500 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described 501 * by tag/handle starting at `offset'. 502 */ 503 504 static void 505 rmi_bus_space_set_region_2(void *t, bus_space_handle_t bsh, 506 bus_size_t offset, u_int16_t value, size_t count) 507 { 508 bus_addr_t addr = bsh + offset; 509 510 for (; count != 0; count--, addr += 2) 511 (*(volatile u_int32_t *)(addr)) = value; 512 } 513 514 static void 515 rmi_bus_space_set_region_4(void *t, bus_space_handle_t bsh, 516 bus_size_t offset, u_int32_t value, size_t count) 517 { 518 bus_addr_t addr = bsh + offset; 519 520 for (; count != 0; count--, addr += 4) 521 (*(volatile u_int32_t *)(addr)) = value; 522 } 523 524 /* 525 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting 526 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. 527 */ 528 static void 529 rmi_bus_space_copy_region_2(void *t, bus_space_handle_t bsh1, 530 bus_size_t off1, bus_space_handle_t bsh2, 531 bus_size_t off2, size_t count) 532 { 533 printf("bus_space_copy_region_2 - unimplemented\n"); 534 } 535 536 /* 537 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 538 * described by tag/handle/offset and copy into buffer provided. 539 */ 540 541 u_int8_t 542 rmi_bus_space_read_stream_1(void *t, bus_space_handle_t handle, 543 bus_size_t offset) 544 { 545 546 return *((volatile u_int8_t *)(handle + offset)); 547 } 548 549 static u_int16_t 550 rmi_bus_space_read_stream_2(void *t, bus_space_handle_t handle, 551 bus_size_t offset) 552 { 553 return *(volatile u_int16_t *)(handle + offset); 554 } 555 556 static u_int32_t 557 rmi_bus_space_read_stream_4(void *t, bus_space_handle_t handle, 558 bus_size_t offset) 559 { 560 return (*(volatile u_int32_t *)(handle + offset)); 561 } 562 563 static void 564 rmi_bus_space_read_multi_stream_1(void *tag, bus_space_handle_t handle, 565 bus_size_t offset, u_int8_t *addr, size_t count) 566 { 567 TODO(); 568 } 569 570 static void 571 rmi_bus_space_read_multi_stream_2(void *tag, bus_space_handle_t handle, 572 bus_size_t offset, u_int16_t *addr, size_t count) 573 { 574 TODO(); 575 } 576 577 static void 578 rmi_bus_space_read_multi_stream_4(void *tag, bus_space_handle_t handle, 579 bus_size_t offset, u_int32_t *addr, size_t count) 580 { 581 TODO(); 582 } 583 584 /* 585 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 586 * described by tag/handle and starting at `offset' and copy into 587 * buffer provided. 588 */ 589 void 590 rmi_bus_space_read_region_1(void *t, bus_space_handle_t bsh, 591 bus_size_t offset, u_int8_t *addr, size_t count) 592 { 593 TODO(); 594 } 595 596 void 597 rmi_bus_space_read_region_2(void *t, bus_space_handle_t bsh, 598 bus_size_t offset, u_int16_t *addr, size_t count) 599 { 600 TODO(); 601 } 602 603 void 604 rmi_bus_space_read_region_4(void *t, bus_space_handle_t bsh, 605 bus_size_t offset, u_int32_t *addr, size_t count) 606 { 607 bus_addr_t baddr = bsh + offset; 608 609 while (count--) { 610 *addr++ = (*(volatile u_int32_t *)(baddr)); 611 baddr += 4; 612 } 613 } 614 615 void 616 rmi_bus_space_write_stream_1(void *t, bus_space_handle_t handle, 617 bus_size_t offset, u_int8_t value) 618 { 619 TODO(); 620 } 621 622 static void 623 rmi_bus_space_write_stream_2(void *t, bus_space_handle_t handle, 624 bus_size_t offset, u_int16_t value) 625 { 626 TODO(); 627 } 628 629 static void 630 rmi_bus_space_write_stream_4(void *t, bus_space_handle_t handle, 631 bus_size_t offset, u_int32_t value) 632 { 633 TODO(); 634 } 635 636 static void 637 rmi_bus_space_write_multi_stream_1(void *tag, bus_space_handle_t handle, 638 bus_size_t offset, const u_int8_t *addr, size_t count) 639 { 640 TODO(); 641 } 642 643 static void 644 rmi_bus_space_write_multi_stream_2(void *tag, bus_space_handle_t handle, 645 bus_size_t offset, const u_int16_t *addr, size_t count) 646 { 647 TODO(); 648 } 649 650 static void 651 rmi_bus_space_write_multi_stream_4(void *tag, bus_space_handle_t handle, 652 bus_size_t offset, const u_int32_t *addr, size_t count) 653 { 654 TODO(); 655 } 656 657 void 658 rmi_bus_space_write_region_2(void *t, 659 bus_space_handle_t bsh, 660 bus_size_t offset, 661 const u_int16_t *addr, 662 size_t count) 663 { 664 TODO(); 665 } 666 667 void 668 rmi_bus_space_write_region_4(void *t, bus_space_handle_t bsh, 669 bus_size_t offset, const u_int32_t *addr, size_t count) 670 { 671 TODO(); 672 } 673 674 static void 675 rmi_bus_space_barrier(void *tag __unused, bus_space_handle_t bsh __unused, 676 bus_size_t offset __unused, bus_size_t len __unused, int flags) 677 { 678 } 679 680 /* 681 * need a special bus space for this, because the Netlogic SoC 682 * UART allows only 32 bit access to its registers 683 */ 684 685 static u_int8_t 686 rmi_uart_bus_space_read_1(void *tag, bus_space_handle_t handle, 687 bus_size_t offset) 688 { 689 return (u_int8_t)(*(volatile u_int32_t *)(handle + offset)); 690 } 691 692 static void 693 rmi_uart_bus_space_write_1(void *tag, bus_space_handle_t handle, 694 bus_size_t offset, u_int8_t value) 695 { 696 *(volatile u_int32_t *)(handle + offset) = value; 697 } 698 699 static struct bus_space local_rmi_uart_bus_space = { 700 /* cookie */ 701 (void *)0, 702 703 /* mapping/unmapping */ 704 rmi_bus_space_map, 705 rmi_bus_space_unmap, 706 rmi_bus_space_subregion, 707 708 /* allocation/deallocation */ 709 NULL, 710 NULL, 711 712 /* barrier */ 713 rmi_bus_space_barrier, 714 715 /* read (single) */ 716 rmi_uart_bus_space_read_1, NULL, NULL, NULL, 717 718 /* read multiple */ 719 NULL, NULL, NULL, NULL, 720 721 /* read region */ 722 NULL, NULL, NULL, NULL, 723 724 /* write (single) */ 725 rmi_uart_bus_space_write_1, NULL, NULL, NULL, 726 727 /* write multiple */ 728 NULL, NULL, NULL, NULL, 729 730 /* write region */ 731 NULL, NULL, NULL, NULL, 732 733 /* set multiple */ 734 NULL, NULL, NULL, NULL, 735 736 /* set region */ 737 NULL, NULL, NULL, NULL, 738 739 /* copy */ 740 NULL, NULL, NULL, NULL, 741 742 /* read (single) stream */ 743 NULL, NULL, NULL, NULL, 744 745 /* read multiple stream */ 746 NULL, NULL, NULL, NULL, 747 748 /* read region stream */ 749 NULL, NULL, NULL, NULL, 750 751 /* write (single) stream */ 752 NULL, NULL, NULL, NULL, 753 754 /* write multiple stream */ 755 NULL, NULL, NULL, NULL, 756 757 /* write region stream */ 758 NULL, NULL, NULL, NULL, 759 }; 760 761 /* generic bus_space tag */ 762 bus_space_tag_t rmi_uart_bus_space = &local_rmi_uart_bus_space;
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