bus.h revision 1.12
1 /* $NetBSD: bus.h,v 1.12 2021/01/23 19:38:08 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (C) 1997 Scott Reynolds. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. The name of the author may not be used to endorse or promote products 45 * derived from this software without specific prior written permission 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 */ 58 59 /* bus_space(9) functions for news68k. Just taken from hp300. */ 60 61 #ifndef _NEWS68K_BUS_H_ 62 #define _NEWS68K_BUS_H_ 63 64 /* 65 * Values for the news68k bus space tag, not to be used directly by MI code. 66 */ 67 #define NEWS68K_BUS_SPACE_INTIO 0 /* space is intio space */ 68 #define NEWS68K_BUS_SPACE_EIO 1 /* space is eio space */ 69 70 /* 71 * Bus address and size types 72 */ 73 typedef u_long bus_addr_t; 74 typedef u_long bus_size_t; 75 76 #define PRIxBUSADDR "lx" 77 #define PRIxBUSSIZE "lx" 78 #define PRIuBUSSIZE "lu" 79 80 /* 81 * Access methods for bus resources and address space. 82 */ 83 typedef int bus_space_tag_t; 84 typedef u_long bus_space_handle_t; 85 86 #define PRIxBSH "lx" 87 88 /* 89 * int bus_space_map(bus_space_tag_t t, bus_addr_t addr, 90 * bus_size_t size, int flags, bus_space_handle_t *bshp); 91 * 92 * Map a region of bus space. 93 */ 94 95 #define BUS_SPACE_MAP_CACHEABLE 0x01 96 #define BUS_SPACE_MAP_LINEAR 0x02 97 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 98 99 int bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, 100 int, bus_space_handle_t *); 101 102 /* 103 * void bus_space_unmap(bus_space_tag_t t, 104 * bus_space_handle_t bsh, bus_size_t size); 105 * 106 * Unmap a region of bus space. 107 */ 108 109 void bus_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t); 110 111 /* 112 * int bus_space_subregion(bus_space_tag_t t, 113 * bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, 114 * bus_space_handle_t *nbshp); 115 * 116 * Get a new handle for a subregion of an already-mapped area of bus space. 117 */ 118 119 int bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh, 120 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp); 121 122 /* 123 * int bus_space_alloc(bus_space_tag_t t, bus_addr_t, rstart, 124 * bus_addr_t rend, bus_size_t size, bus_size_t align, 125 * bus_size_t boundary, int flags, bus_addr_t *addrp, 126 * bus_space_handle_t *bshp); 127 * 128 * Allocate a region of bus space. 129 */ 130 131 int bus_space_alloc(bus_space_tag_t t, bus_addr_t rstart, 132 bus_addr_t rend, bus_size_t size, bus_size_t align, 133 bus_size_t boundary, int cacheable, bus_addr_t *addrp, 134 bus_space_handle_t *bshp); 135 136 /* 137 * int bus_space_free(bus_space_tag_t t, 138 * bus_space_handle_t bsh, bus_size_t size); 139 * 140 * Free a region of bus space. 141 */ 142 143 void bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh, 144 bus_size_t size); 145 146 /* 147 * int news68k_bus_space_probe(bus_space_tag_t t, 148 * bus_space_handle_t bsh, bus_size_t offset, int sz); 149 * 150 * Probe the bus at t/bsh/offset, using sz as the size of the load. 151 * 152 * This is a machine-dependent extension, and is not to be used by 153 * machine-independent code. 154 */ 155 156 int news68k_bus_space_probe(bus_space_tag_t t, 157 bus_space_handle_t bsh, bus_size_t offset, int sz); 158 159 /* 160 * uintN_t bus_space_read_N(bus_space_tag_t tag, 161 * bus_space_handle_t bsh, bus_size_t offset); 162 * 163 * Read a 1, 2, 4, or 8 byte quantity from bus space 164 * described by tag/handle/offset. 165 */ 166 167 #define bus_space_read_1(t, h, o) \ 168 ((void) t, (*(volatile uint8_t *)((h) + (o)))) 169 170 #define bus_space_read_2(t, h, o) \ 171 ((void) t, (*(volatile uint16_t *)((h) + (o)))) 172 173 #define bus_space_read_4(t, h, o) \ 174 ((void) t, (*(volatile uint32_t *)((h) + (o)))) 175 176 /* 177 * void bus_space_read_multi_N(bus_space_tag_t tag, 178 * bus_space_handle_t bsh, bus_size_t offset, 179 * uintN_t *addr, size_t count); 180 * 181 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 182 * described by tag/handle/offset and copy into buffer provided. 183 */ 184 185 #define bus_space_read_multi_1(t, h, o, a, c) do { \ 186 (void) t; \ 187 __asm volatile (" \ 188 movl %0,%%a0 ; \ 189 movl %1,%%a1 ; \ 190 movl %2,%%d0 ; \ 191 1: movb %%a0@,%%a1@+ ; \ 192 subql #1,%%d0 ; \ 193 jne 1b" : \ 194 : \ 195 "r" ((h) + (o)), "g" (a), "g" (c) : \ 196 "%a0","%a1","%d0"); \ 197 } while (0) 198 199 #define bus_space_read_multi_2(t, h, o, a, c) do { \ 200 (void) t; \ 201 __asm volatile (" \ 202 movl %0,%%a0 ; \ 203 movl %1,%%a1 ; \ 204 movl %2,%%d0 ; \ 205 1: movw %%a0@,%%a1@+ ; \ 206 subql #1,%%d0 ; \ 207 jne 1b" : \ 208 : \ 209 "r" ((h) + (o)), "g" (a), "g" (c) : \ 210 "%a0","%a1","%d0"); \ 211 } while (0) 212 213 #define bus_space_read_multi_4(t, h, o, a, c) do { \ 214 (void) t; \ 215 __asm volatile (" \ 216 movl %0,%%a0 ; \ 217 movl %1,%%a1 ; \ 218 movl %2,%%d0 ; \ 219 1: movl %%a0@,%%a1@+ ; \ 220 subql #1,%%d0 ; \ 221 jne 1b" : \ 222 : \ 223 "r" ((h) + (o)), "g" (a), "g" (c) : \ 224 "%a0","%a1","%d0"); \ 225 } while (0) 226 227 /* 228 * void bus_space_read_region_N(bus_space_tag_t tag, 229 * bus_space_handle_t bsh, bus_size_t offset, 230 * uintN_t *addr, size_t count); 231 * 232 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 233 * described by tag/handle and starting at `offset' and copy into 234 * buffer provided. 235 */ 236 237 #define bus_space_read_region_1(t, h, o, a, c) do { \ 238 (void) t; \ 239 __asm volatile (" \ 240 movl %0,%%a0 ; \ 241 movl %1,%%a1 ; \ 242 movl %2,%%d0 ; \ 243 1: movb %%a0@+,%%a1@+ ; \ 244 subql #1,%%d0 ; \ 245 jne 1b" : \ 246 : \ 247 "r" ((h) + (o)), "g" (a), "g" (c) : \ 248 "%a0","%a1","%d0"); \ 249 } while (0) 250 251 #define bus_space_read_region_2(t, h, o, a, c) do { \ 252 (void) t; \ 253 __asm volatile (" \ 254 movl %0,%%a0 ; \ 255 movl %1,%%a1 ; \ 256 movl %2,%%d0 ; \ 257 1: movw %%a0@+,%%a1@+ ; \ 258 subql #1,%%d0 ; \ 259 jne 1b" : \ 260 : \ 261 "r" ((h) + (o)), "g" (a), "g" (c) : \ 262 "%a0","%a1","%d0"); \ 263 } while (0) 264 265 #define bus_space_read_region_4(t, h, o, a, c) do { \ 266 (void) t; \ 267 __asm volatile (" \ 268 movl %0,%%a0 ; \ 269 movl %1,%%a1 ; \ 270 movl %2,%%d0 ; \ 271 1: movl %%a0@+,%%a1@+ ; \ 272 subql #1,%%d0 ; \ 273 jne 1b" : \ 274 : \ 275 "r" ((h) + (o)), "g" (a), "g" (c) : \ 276 "%a0","%a1","%d0"); \ 277 } while (0) 278 279 /* 280 * void bus_space_write_N(bus_space_tag_t tag, 281 * bus_space_handle_t bsh, bus_size_t offset, 282 * uintN_t value); 283 * 284 * Write the 1, 2, 4, or 8 byte value `value' to bus space 285 * described by tag/handle/offset. 286 */ 287 288 #define bus_space_write_1(t, h, o, v) \ 289 ((void) t, ((void)(*(volatile uint8_t *)((h) + (o)) = (v)))) 290 291 #define bus_space_write_2(t, h, o, v) \ 292 ((void) t, ((void)(*(volatile uint16_t *)((h) + (o)) = (v)))) 293 294 #define bus_space_write_4(t, h, o, v) \ 295 ((void) t, ((void)(*(volatile uint32_t *)((h) + (o)) = (v)))) 296 297 /* 298 * void bus_space_write_multi_N(bus_space_tag_t tag, 299 * bus_space_handle_t bsh, bus_size_t offset, 300 * const uintN_t *addr, size_t count); 301 * 302 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer 303 * provided to bus space described by tag/handle/offset. 304 */ 305 306 #define bus_space_write_multi_1(t, h, o, a, c) do { \ 307 (void) t; \ 308 __asm volatile (" \ 309 movl %0,%%a0 ; \ 310 movl %1,%%a1 ; \ 311 movl %2,%%d0 ; \ 312 1: movb %%a1@+,%%a0@ ; \ 313 subql #1,%%d0 ; \ 314 jne 1b" : \ 315 : \ 316 "r" ((h) + (o)), "g" (a), "g" (c) : \ 317 "%a0","%a1","%d0"); \ 318 } while (0) 319 320 #define bus_space_write_multi_2(t, h, o, a, c) do { \ 321 (void) t; \ 322 __asm volatile (" \ 323 movl %0,%%a0 ; \ 324 movl %1,%%a1 ; \ 325 movl %2,%%d0 ; \ 326 1: movw %%a1@+,%%a0@ ; \ 327 subql #1,%%d0 ; \ 328 jne 1b" : \ 329 : \ 330 "r" ((h) + (o)), "g" (a), "g" (c) : \ 331 "%a0","%a1","%d0"); \ 332 } while (0) 333 334 #define bus_space_write_multi_4(t, h, o, a, c) do { \ 335 (void) t; \ 336 __asm volatile (" \ 337 movl %0,%%a0 ; \ 338 movl %1,%%a1 ; \ 339 movl %2,%%d0 ; \ 340 1: movl %%a1@+,%%a0@ ; \ 341 subql #1,%%d0 ; \ 342 jne 1b" : \ 343 : \ 344 "r" ((h) + (o)), "g" (a), "g" (c) : \ 345 "%a0","%a1","%d0"); \ 346 } while (0) 347 348 /* 349 * void bus_space_write_region_N(bus_space_tag_t tag, 350 * bus_space_handle_t bsh, bus_size_t offset, 351 * const uintN_t *addr, size_t count); 352 * 353 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided 354 * to bus space described by tag/handle starting at `offset'. 355 */ 356 357 #define bus_space_write_region_1(t, h, o, a, c) do { \ 358 (void) t; \ 359 __asm volatile (" \ 360 movl %0,%%a0 ; \ 361 movl %1,%%a1 ; \ 362 movl %2,%%d0 ; \ 363 1: movb %%a1@+,%%a0@+ ; \ 364 subql #1,%%d0 ; \ 365 jne 1b" : \ 366 : \ 367 "r" ((h) + (o)), "g" (a), "g" (c) : \ 368 "%a0","%a1","%d0"); \ 369 } while (0) 370 371 #define bus_space_write_region_2(t, h, o, a, c) do { \ 372 (void) t; \ 373 __asm volatile (" \ 374 movl %0,%%a0 ; \ 375 movl %1,%%a1 ; \ 376 movl %2,%%d0 ; \ 377 1: movw %%a1@+,%%a0@+ ; \ 378 subql #1,%%d0 ; \ 379 jne 1b" : \ 380 : \ 381 "r" ((h) + (o)), "g" (a), "g" (c) : \ 382 "%a0","%a1","%d0"); \ 383 } while (0) 384 385 #define bus_space_write_region_4(t, h, o, a, c) do { \ 386 (void) t; \ 387 __asm volatile (" \ 388 movl %0,%%a0 ; \ 389 movl %1,%%a1 ; \ 390 movl %2,%%d0 ; \ 391 1: movl %%a1@+,%%a0@+ ; \ 392 subql #1,%%d0 ; \ 393 jne 1b" : \ 394 : \ 395 "r" ((h) + (o)), "g" (a), "g" (c) : \ 396 "%a0","%a1","%d0"); \ 397 } while (0) 398 399 /* 400 * void bus_space_set_multi_N(bus_space_tag_t tag, 401 * bus_space_handle_t bsh, bus_size_t offset, uintN_t val, 402 * size_t count); 403 * 404 * Write the 1, 2, 4, or 8 byte value `val' to bus space described 405 * by tag/handle/offset `count' times. 406 */ 407 408 #define bus_space_set_multi_1(t, h, o, val, c) do { \ 409 (void) t; \ 410 __asm volatile (" \ 411 movl %0,%%a0 ; \ 412 movl %1,%%d1 ; \ 413 movl %2,%%d0 ; \ 414 1: movb %%d1,%%a0@ ; \ 415 subql #1,%%d0 ; \ 416 jne 1b" : \ 417 : \ 418 "r" ((h) + (o)), "g" (val), "g" (c) : \ 419 "%a0","%d0","%d1"); \ 420 } while (0) 421 422 #define bus_space_set_multi_2(t, h, o, val, c) do { \ 423 (void) t; \ 424 __asm volatile (" \ 425 movl %0,%%a0 ; \ 426 movl %1,%%d1 ; \ 427 movl %2,%%d0 ; \ 428 1: movw %%d1,%%a0@ ; \ 429 subql #1,%%d0 ; \ 430 jne 1b" : \ 431 : \ 432 "r" ((h) + (o)), "g" (val), "g" (c) : \ 433 "%a0","%d0","%d1"); \ 434 } while (0) 435 436 #define bus_space_set_multi_4(t, h, o, val, c) do { \ 437 (void) t; \ 438 __asm volatile (" \ 439 movl %0,%%a0 ; \ 440 movl %1,%%d1 ; \ 441 movl %2,%%d0 ; \ 442 1: movl %%d1,%%a0@ ; \ 443 subql #1,%%d0 ; \ 444 jne 1b" : \ 445 : \ 446 "r" ((h) + (o)), "g" (val), "g" (c) : \ 447 "%a0","%d0","%d1"); \ 448 } while (0) 449 450 /* 451 * void bus_space_set_region_N(bus_space_tag_t tag, 452 * bus_space_handle_t bsh, bus_size_t offset, uintN_t val, 453 * size_t count); 454 * 455 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described 456 * by tag/handle starting at `offset'. 457 */ 458 459 #define bus_space_set_region_1(t, h, o, val, c) do { \ 460 (void) t; \ 461 __asm volatile (" \ 462 movl %0,%%a0 ; \ 463 movl %1,%%d1 ; \ 464 movl %2,%%d0 ; \ 465 1: movb %%d1,%%a0@+ ; \ 466 subql #1,%%d0 ; \ 467 jne 1b" : \ 468 : \ 469 "r" ((h) + (o)), "g" (val), "g" (c) : \ 470 "%a0","%d0","%d1"); \ 471 } while (0) 472 473 #define bus_space_set_region_2(t, h, o, val, c) do { \ 474 (void) t; \ 475 __asm volatile (" \ 476 movl %0,%%a0 ; \ 477 movl %1,%%d1 ; \ 478 movl %2,%%d0 ; \ 479 1: movw %%d1,%%a0@+ ; \ 480 subql #1,%%d0 ; \ 481 jne 1b" : \ 482 : \ 483 "r" ((h) + (o)), "g" (val), "g" (c) : \ 484 "%a0","%d0","%d1"); \ 485 } while (0) 486 487 #define bus_space_set_region_4(t, h, o, val, c) do { \ 488 (void) t; \ 489 __asm volatile (" \ 490 movl %0,%%a0 ; \ 491 movl %1,%%d1 ; \ 492 movl %2,%%d0 ; \ 493 1: movl %%d1,%%a0@+ ; \ 494 subql #1,%%d0 ; \ 495 jne 1b" : \ 496 : \ 497 "r" ((h) + (o)), "g" (val), "g" (c) : \ 498 "%a0","%d0","%d1"); \ 499 } while (0) 500 501 /* 502 * void bus_space_copy_region_N(bus_space_tag_t tag, 503 * bus_space_handle_t bsh1, bus_size_t off1, 504 * bus_space_handle_t bsh2, bus_size_t off2, 505 * bus_size_t count); 506 * 507 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting 508 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. 509 */ 510 511 #define __NEWS68K_copy_region_N(BYTES) \ 512 static __inline void __CONCAT(bus_space_copy_region_,BYTES) \ 513 (bus_space_tag_t, \ 514 bus_space_handle_t bsh1, bus_size_t off1, \ 515 bus_space_handle_t bsh2, bus_size_t off2, \ 516 bus_size_t count); \ 517 \ 518 static __inline void \ 519 __CONCAT(bus_space_copy_region_,BYTES)(bus_space_tag_t t, \ 520 bus_space_handle_t h1, bus_space_handle_t h2, \ 521 bus_size_t o1, bus_size_t o2, bus_size_t c) \ 522 { \ 523 bus_size_t o; \ 524 \ 525 if ((h1 + o1) >= (h2 + o2)) { \ 526 /* src after dest: copy forward */ \ 527 for (o = 0; c != 0; c--, o += BYTES) \ 528 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ 529 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ 530 } else { \ 531 /* dest after src: copy backwards */ \ 532 for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \ 533 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ 534 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ 535 } \ 536 } 537 __NEWS68K_copy_region_N(1) 538 __NEWS68K_copy_region_N(2) 539 __NEWS68K_copy_region_N(4) 540 541 #undef __NEWS68K_copy_region_N 542 543 /* 544 * Bus read/write barrier methods. 545 * 546 * void bus_space_barrier(bus_space_tag_t tag, 547 * bus_space_handle_t bsh, bus_size_t offset, 548 * bus_size_t len, int flags); 549 * 550 * Note: the 680x0 does not currently require barriers, but we must 551 * provide the flags to MI code. 552 */ 553 #define bus_space_barrier(t, h, o, l, f) \ 554 ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f))) 555 #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */ 556 #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */ 557 558 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) 559 560 /* 561 * There is no bus_dma(9)'fied bus drivers on this port. 562 */ 563 #define __HAVE_NO_BUS_DMA 564 565 #endif /* _NEWS68K_BUS_H_ */ 566
Indexes created Wed Oct 22 00:09:40 GMT 2025