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); 166 167 168 static void 169 rmi_bus_space_set_region_2(void *t, 170 bus_space_handle_t bsh, 171 bus_size_t offset, u_int16_t value, 172 size_t count); 173 static void 174 rmi_bus_space_set_region_4(void *t, 175 bus_space_handle_t bsh, 176 bus_size_t offset, u_int32_t value, 177 size_t count); 178 179 static void 180 rmi_bus_space_barrier(void *tag __unused, bus_space_handle_t bsh __unused, 181 bus_size_t offset __unused, bus_size_t len __unused, int flags); 182 183 static void 184 rmi_bus_space_copy_region_2(void *t, 185 bus_space_handle_t bsh1, 186 bus_size_t off1, 187 bus_space_handle_t bsh2, 188 bus_size_t off2, size_t count); 189 190 u_int8_t 191 rmi_bus_space_read_stream_1(void *t, bus_space_handle_t handle, 192 bus_size_t offset); 193 194 static u_int16_t 195 rmi_bus_space_read_stream_2(void *t, bus_space_handle_t handle, 196 bus_size_t offset); 197 198 static u_int32_t 199 rmi_bus_space_read_stream_4(void *t, bus_space_handle_t handle, 200 bus_size_t offset); 201 static void 202 rmi_bus_space_read_multi_stream_1(void *t, 203 bus_space_handle_t handle, 204 bus_size_t offset, u_int8_t *addr, 205 size_t count); 206 207 static void 208 rmi_bus_space_read_multi_stream_2(void *t, 209 bus_space_handle_t handle, 210 bus_size_t offset, u_int16_t *addr, 211 size_t count); 212 213 static void 214 rmi_bus_space_read_multi_stream_4(void *t, 215 bus_space_handle_t handle, 216 bus_size_t offset, u_int32_t *addr, 217 size_t count); 218 219 void 220 rmi_bus_space_write_stream_1(void *t, bus_space_handle_t bsh, 221 bus_size_t offset, u_int8_t value); 222 static void 223 rmi_bus_space_write_stream_2(void *t, bus_space_handle_t handle, 224 bus_size_t offset, u_int16_t value); 225 226 static void 227 rmi_bus_space_write_stream_4(void *t, bus_space_handle_t handle, 228 bus_size_t offset, u_int32_t value); 229 230 static void 231 rmi_bus_space_write_multi_stream_1(void *t, 232 bus_space_handle_t handle, 233 bus_size_t offset, 234 const u_int8_t *addr, 235 size_t count); 236 static void 237 rmi_bus_space_write_multi_stream_2(void *t, 238 bus_space_handle_t handle, 239 bus_size_t offset, 240 const u_int16_t *addr, 241 size_t count); 242 243 static void 244 rmi_bus_space_write_multi_stream_4(void *t, 245 bus_space_handle_t handle, 246 bus_size_t offset, 247 const u_int32_t *addr, 248 size_t count); 249 250 #define TODO() printf("XLP bus space: '%s' unimplemented\n", __func__) 251 252 static struct bus_space local_rmi_bus_space = { 253 /* cookie */ 254 (void *)0, 255 256 /* mapping/unmapping */ 257 rmi_bus_space_map, 258 rmi_bus_space_unmap, 259 rmi_bus_space_subregion, 260 261 /* allocation/deallocation */ 262 NULL, 263 NULL, 264 265 /* barrier */ 266 rmi_bus_space_barrier, 267 268 /* read (single) */ 269 rmi_bus_space_read_1, 270 rmi_bus_space_read_2, 271 rmi_bus_space_read_4, 272 NULL, 273 274 /* read multiple */ 275 rmi_bus_space_read_multi_1, 276 rmi_bus_space_read_multi_2, 277 rmi_bus_space_read_multi_4, 278 NULL, 279 280 /* read region */ 281 rmi_bus_space_read_region_1, 282 rmi_bus_space_read_region_2, 283 rmi_bus_space_read_region_4, 284 NULL, 285 286 /* write (single) */ 287 rmi_bus_space_write_1, 288 rmi_bus_space_write_2, 289 rmi_bus_space_write_4, 290 NULL, 291 292 /* write multiple */ 293 rmi_bus_space_write_multi_1, 294 rmi_bus_space_write_multi_2, 295 rmi_bus_space_write_multi_4, 296 NULL, 297 298 /* write region */ 299 NULL, 300 rmi_bus_space_write_region_2, 301 rmi_bus_space_write_region_4, 302 NULL, 303 304 /* set multiple */ 305 NULL, 306 NULL, 307 NULL, 308 NULL, 309 310 /* set region */ 311 NULL, 312 rmi_bus_space_set_region_2, 313 rmi_bus_space_set_region_4, 314 NULL, 315 316 /* copy */ 317 NULL, 318 rmi_bus_space_copy_region_2, 319 NULL, 320 NULL, 321 322 /* read (single) stream */ 323 rmi_bus_space_read_stream_1, 324 rmi_bus_space_read_stream_2, 325 rmi_bus_space_read_stream_4, 326 NULL, 327 328 /* read multiple stream */ 329 rmi_bus_space_read_multi_stream_1, 330 rmi_bus_space_read_multi_stream_2, 331 rmi_bus_space_read_multi_stream_4, 332 NULL, 333 334 /* read region stream */ 335 rmi_bus_space_read_region_1, 336 rmi_bus_space_read_region_2, 337 rmi_bus_space_read_region_4, 338 NULL, 339 340 /* write (single) stream */ 341 rmi_bus_space_write_stream_1, 342 rmi_bus_space_write_stream_2, 343 rmi_bus_space_write_stream_4, 344 NULL, 345 346 /* write multiple stream */ 347 rmi_bus_space_write_multi_stream_1, 348 rmi_bus_space_write_multi_stream_2, 349 rmi_bus_space_write_multi_stream_4, 350 NULL, 351 352 /* write region stream */ 353 NULL, 354 rmi_bus_space_write_region_2, 355 rmi_bus_space_write_region_4, 356 NULL, 357 }; 358 359 /* generic bus_space tag */ 360 bus_space_tag_t rmi_bus_space = &local_rmi_bus_space; 361 362 /* 363 * Map a region of device bus space into CPU virtual address space. 364 */ 365 static int 366 rmi_bus_space_map(void *t __unused, bus_addr_t addr, 367 bus_size_t size __unused, int flags __unused, 368 bus_space_handle_t *bshp) 369 { 370 371 *bshp = MIPS_PHYS_TO_DIRECT_UNCACHED(addr); 372 return (0); 373 } 374 375 /* 376 * Unmap a region of device bus space. 377 */ 378 static void 379 rmi_bus_space_unmap(void *t __unused, bus_space_handle_t bsh __unused, 380 bus_size_t size __unused) 381 { 382 } 383 384 /* 385 * Get a new handle for a subregion of an already-mapped area of bus space. 386 */ 387 388 static int 389 rmi_bus_space_subregion(void *t __unused, bus_space_handle_t bsh, 390 bus_size_t offset, bus_size_t size __unused, 391 bus_space_handle_t *nbshp) 392 { 393 *nbshp = bsh + offset; 394 return (0); 395 } 396 397 /* 398 * Read a 1, 2, 4, or 8 byte quantity from bus space 399 * described by tag/handle/offset. 400 */ 401 402 static u_int8_t 403 rmi_bus_space_read_1(void *tag, bus_space_handle_t handle, 404 bus_size_t offset) 405 { 406 return (u_int8_t) (*(volatile u_int8_t *)(handle + offset)); 407 } 408 409 static u_int16_t 410 rmi_bus_space_read_2(void *tag, bus_space_handle_t handle, 411 bus_size_t offset) 412 { 413 return (u_int16_t)(*(volatile u_int16_t *)(handle + offset)); 414 } 415 416 static u_int32_t 417 rmi_bus_space_read_4(void *tag, bus_space_handle_t handle, 418 bus_size_t offset) 419 { 420 return (*(volatile u_int32_t *)(handle + offset)); 421 } 422 423 424 /* 425 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 426 * described by tag/handle/offset and copy into buffer provided. 427 */ 428 static void 429 rmi_bus_space_read_multi_1(void *tag, bus_space_handle_t handle, 430 bus_size_t offset, u_int8_t *addr, size_t count) 431 { 432 TODO(); 433 } 434 435 static void 436 rmi_bus_space_read_multi_2(void *tag, bus_space_handle_t handle, 437 bus_size_t offset, u_int16_t *addr, size_t count) 438 { 439 TODO(); 440 } 441 442 static void 443 rmi_bus_space_read_multi_4(void *tag, bus_space_handle_t handle, 444 bus_size_t offset, u_int32_t *addr, size_t count) 445 { 446 TODO(); 447 } 448 449 /* 450 * Write the 1, 2, 4, or 8 byte value `value' to bus space 451 * described by tag/handle/offset. 452 */ 453 454 static void 455 rmi_bus_space_write_1(void *tag, bus_space_handle_t handle, 456 bus_size_t offset, u_int8_t value) 457 { 458 *(volatile u_int8_t *)(handle + offset) = value; 459 } 460 461 static void 462 rmi_bus_space_write_2(void *tag, bus_space_handle_t handle, 463 bus_size_t offset, u_int16_t value) 464 { 465 *(volatile u_int16_t *)(handle + offset) = value; 466 } 467 468 static void 469 rmi_bus_space_write_4(void *tag, bus_space_handle_t handle, 470 bus_size_t offset, u_int32_t value) 471 { 472 *(volatile u_int32_t *)(handle + offset) = value; 473 } 474 475 476 /* 477 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer 478 * provided to bus space described by tag/handle/offset. 479 */ 480 481 482 static void 483 rmi_bus_space_write_multi_1(void *tag, bus_space_handle_t handle, 484 bus_size_t offset, const u_int8_t *addr, size_t count) 485 { 486 TODO(); 487 } 488 489 static void 490 rmi_bus_space_write_multi_2(void *tag, bus_space_handle_t handle, 491 bus_size_t offset, const u_int16_t *addr, size_t count) 492 { 493 TODO(); 494 } 495 496 static void 497 rmi_bus_space_write_multi_4(void *tag, bus_space_handle_t handle, 498 bus_size_t offset, const u_int32_t *addr, size_t count) 499 { 500 TODO(); 501 } 502 503 /* 504 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described 505 * by tag/handle starting at `offset'. 506 */ 507 508 static void 509 rmi_bus_space_set_region_2(void *t, bus_space_handle_t bsh, 510 bus_size_t offset, u_int16_t value, size_t count) 511 { 512 bus_addr_t addr = bsh + offset; 513 514 for (; count != 0; count--, addr += 2) 515 (*(volatile u_int32_t *)(addr)) = value; 516 } 517 518 static void 519 rmi_bus_space_set_region_4(void *t, bus_space_handle_t bsh, 520 bus_size_t offset, u_int32_t value, size_t count) 521 { 522 bus_addr_t addr = bsh + offset; 523 524 for (; count != 0; count--, addr += 4) 525 (*(volatile u_int32_t *)(addr)) = value; 526 } 527 528 529 /* 530 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting 531 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. 532 */ 533 static void 534 rmi_bus_space_copy_region_2(void *t, bus_space_handle_t bsh1, 535 bus_size_t off1, bus_space_handle_t bsh2, 536 bus_size_t off2, size_t count) 537 { 538 printf("bus_space_copy_region_2 - unimplemented\n"); 539 } 540 541 /* 542 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 543 * described by tag/handle/offset and copy into buffer provided. 544 */ 545 546 u_int8_t 547 rmi_bus_space_read_stream_1(void *t, bus_space_handle_t handle, 548 bus_size_t offset) 549 { 550 551 return *((volatile u_int8_t *)(handle + offset)); 552 } 553 554 555 static u_int16_t 556 rmi_bus_space_read_stream_2(void *t, bus_space_handle_t handle, 557 bus_size_t offset) 558 { 559 return *(volatile u_int16_t *)(handle + offset); 560 } 561 562 563 static u_int32_t 564 rmi_bus_space_read_stream_4(void *t, bus_space_handle_t handle, 565 bus_size_t offset) 566 { 567 return (*(volatile u_int32_t *)(handle + offset)); 568 } 569 570 571 static void 572 rmi_bus_space_read_multi_stream_1(void *tag, bus_space_handle_t handle, 573 bus_size_t offset, u_int8_t *addr, size_t count) 574 { 575 TODO(); 576 } 577 578 static void 579 rmi_bus_space_read_multi_stream_2(void *tag, bus_space_handle_t handle, 580 bus_size_t offset, u_int16_t *addr, size_t count) 581 { 582 TODO(); 583 } 584 585 static void 586 rmi_bus_space_read_multi_stream_4(void *tag, bus_space_handle_t handle, 587 bus_size_t offset, u_int32_t *addr, size_t count) 588 { 589 TODO(); 590 } 591 592 593 /* 594 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 595 * described by tag/handle and starting at `offset' and copy into 596 * buffer provided. 597 */ 598 void 599 rmi_bus_space_read_region_1(void *t, bus_space_handle_t bsh, 600 bus_size_t offset, u_int8_t *addr, size_t count) 601 { 602 TODO(); 603 } 604 605 void 606 rmi_bus_space_read_region_2(void *t, bus_space_handle_t bsh, 607 bus_size_t offset, u_int16_t *addr, size_t count) 608 { 609 TODO(); 610 } 611 612 void 613 rmi_bus_space_read_region_4(void *t, bus_space_handle_t bsh, 614 bus_size_t offset, u_int32_t *addr, size_t count) 615 { 616 bus_addr_t baddr = bsh + offset; 617 618 while (count--) { 619 *addr++ = (*(volatile u_int32_t *)(baddr)); 620 baddr += 4; 621 } 622 } 623 624 void 625 rmi_bus_space_write_stream_1(void *t, bus_space_handle_t handle, 626 bus_size_t offset, u_int8_t value) 627 { 628 TODO(); 629 } 630 631 632 static void 633 rmi_bus_space_write_stream_2(void *t, bus_space_handle_t handle, 634 bus_size_t offset, u_int16_t value) 635 { 636 TODO(); 637 } 638 639 640 static void 641 rmi_bus_space_write_stream_4(void *t, bus_space_handle_t handle, 642 bus_size_t offset, u_int32_t value) 643 { 644 TODO(); 645 } 646 647 648 static void 649 rmi_bus_space_write_multi_stream_1(void *tag, bus_space_handle_t handle, 650 bus_size_t offset, const u_int8_t *addr, size_t count) 651 { 652 TODO(); 653 } 654 655 static void 656 rmi_bus_space_write_multi_stream_2(void *tag, bus_space_handle_t handle, 657 bus_size_t offset, const u_int16_t *addr, size_t count) 658 { 659 TODO(); 660 } 661 662 static void 663 rmi_bus_space_write_multi_stream_4(void *tag, bus_space_handle_t handle, 664 bus_size_t offset, const u_int32_t *addr, size_t count) 665 { 666 TODO(); 667 } 668 669 void 670 rmi_bus_space_write_region_2(void *t, 671 bus_space_handle_t bsh, 672 bus_size_t offset, 673 const u_int16_t *addr, 674 size_t count) 675 { 676 TODO(); 677 } 678 679 void 680 rmi_bus_space_write_region_4(void *t, bus_space_handle_t bsh, 681 bus_size_t offset, const u_int32_t *addr, size_t count) 682 { 683 TODO(); 684 } 685 686 static void 687 rmi_bus_space_barrier(void *tag __unused, bus_space_handle_t bsh __unused, 688 bus_size_t offset __unused, bus_size_t len __unused, int flags) 689 { 690 } 691 692 /* 693 * need a special bus space for this, because the Netlogic SoC 694 * UART allows only 32 bit access to its registers 695 */ 696 697 static u_int8_t 698 rmi_uart_bus_space_read_1(void *tag, bus_space_handle_t handle, 699 bus_size_t offset) 700 { 701 return (u_int8_t)(*(volatile u_int32_t *)(handle + offset)); 702 } 703 704 static void 705 rmi_uart_bus_space_write_1(void *tag, bus_space_handle_t handle, 706 bus_size_t offset, u_int8_t value) 707 { 708 *(volatile u_int32_t *)(handle + offset) = value; 709 } 710 711 static struct bus_space local_rmi_uart_bus_space = { 712 /* cookie */ 713 (void *)0, 714 715 /* mapping/unmapping */ 716 rmi_bus_space_map, 717 rmi_bus_space_unmap, 718 rmi_bus_space_subregion, 719 720 /* allocation/deallocation */ 721 NULL, 722 NULL, 723 724 /* barrier */ 725 rmi_bus_space_barrier, 726 727 /* read (single) */ 728 rmi_uart_bus_space_read_1, NULL, NULL, NULL, 729 730 /* read multiple */ 731 NULL, NULL, NULL, NULL, 732 733 /* read region */ 734 NULL, NULL, NULL, NULL, 735 736 /* write (single) */ 737 rmi_uart_bus_space_write_1, NULL, NULL, NULL, 738 739 /* write multiple */ 740 NULL, NULL, NULL, NULL, 741 742 /* write region */ 743 NULL, NULL, NULL, NULL, 744 745 /* set multiple */ 746 NULL, NULL, NULL, NULL, 747 748 /* set region */ 749 NULL, NULL, NULL, NULL, 750 751 /* copy */ 752 NULL, NULL, NULL, NULL, 753 754 /* read (single) stream */ 755 NULL, NULL, NULL, NULL, 756 757 /* read multiple stream */ 758 NULL, NULL, NULL, NULL, 759 760 /* read region stream */ 761 NULL, NULL, NULL, NULL, 762 763 /* write (single) stream */ 764 NULL, NULL, NULL, NULL, 765 766 /* write multiple stream */ 767 NULL, NULL, NULL, NULL, 768 769 /* write region stream */ 770 NULL, NULL, NULL, NULL, 771 }; 772 773 /* generic bus_space tag */ 774 bus_space_tag_t rmi_uart_bus_space = &local_rmi_uart_bus_space;
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