1 /* $NetBSD: bus.h,v 1.18 2023/01/27 19:49:21 tsutsui 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 #ifndef _MACHINE_BUS_H_ 60 #define _MACHINE_BUS_H_ 61 62 /* 63 * Value for the luna68k bus space tag, not to be used directly by MI code. 64 */ 65 #define MACHINE_BUS_SPACE_MEM 0 /* space is mem space */ 66 67 /* 68 * Bus address and size types 69 */ 70 typedef u_long bus_addr_t; 71 typedef u_long bus_size_t; 72 73 #define PRIxBUSADDR "lx" 74 #define PRIxBUSSIZE "lx" 75 #define PRIuBUSSIZE "lu" 76 77 /* 78 * Access methods for bus resources and address space. 79 */ 80 typedef int bus_space_tag_t; 81 typedef u_long bus_space_handle_t; 82 83 #define PRIxBSH "lx" 84 85 /* 86 * int bus_space_map(bus_space_tag_t t, bus_addr_t addr, 87 * bus_size_t size, int flags, bus_space_handle_t *bshp); 88 * 89 * Map a region of bus space. 90 */ 91 92 #define BUS_SPACE_MAP_CACHEABLE 0x01 93 #define BUS_SPACE_MAP_LINEAR 0x02 94 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 95 96 int bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, 97 int, bus_space_handle_t *); 98 99 /* 100 * void bus_space_unmap(bus_space_tag_t t, 101 * bus_space_handle_t bsh, bus_size_t size); 102 * 103 * Unmap a region of bus space. 104 */ 105 106 void bus_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t); 107 108 /* 109 * int bus_space_subregion(bus_space_tag_t t, 110 * bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, 111 * bus_space_handle_t *nbshp); 112 * 113 * Get a new handle for a subregion of an already-mapped area of bus space. 114 */ 115 116 int bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh, 117 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp); 118 119 /* 120 * int bus_space_alloc(bus_space_tag_t t, bus_addr_t, rstart, 121 * bus_addr_t rend, bus_size_t size, bus_size_t align, 122 * bus_size_t boundary, int flags, bus_addr_t *addrp, 123 * bus_space_handle_t *bshp); 124 * 125 * Allocate a region of bus space. 126 */ 127 128 int bus_space_alloc(bus_space_tag_t t, bus_addr_t rstart, 129 bus_addr_t rend, bus_size_t size, bus_size_t align, 130 bus_size_t boundary, int cacheable, bus_addr_t *addrp, 131 bus_space_handle_t *bshp); 132 133 /* 134 * int bus_space_free(bus_space_tag_t t, 135 * bus_space_handle_t bsh, bus_size_t size); 136 * 137 * Free a region of bus space. 138 */ 139 140 void bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh, 141 bus_size_t size); 142 143 /* 144 * u_intN_t bus_space_read_N(bus_space_tag_t tag, 145 * bus_space_handle_t bsh, bus_size_t offset); 146 * 147 * Read a 1, 2, 4, or 8 byte quantity from bus space 148 * described by tag/handle/offset. 149 */ 150 151 #define bus_space_read_1(t, h, o) \ 152 ((void) t, (*(volatile u_int8_t *)((h) + (o)*4))) 153 154 #define bus_space_read_2(t, h, o) \ 155 ((void) t, (*(volatile u_int16_t *)((h) + (o)*2))) 156 157 #define bus_space_read_4(t, h, o) \ 158 ((void) t, (*(volatile u_int32_t *)((h) + (o)))) 159 160 /* 161 * void bus_space_read_multi_N(bus_space_tag_t tag, 162 * bus_space_handle_t bsh, bus_size_t offset, 163 * u_intN_t *addr, size_t count); 164 * 165 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 166 * described by tag/handle/offset and copy into buffer provided. 167 */ 168 169 #define bus_space_read_multi_1(t, h, o, a, c) do { \ 170 (void) t; \ 171 __asm volatile (" \ 172 movl %0,%%a0 ; \ 173 movl %1,%%a1 ; \ 174 movl %2,%%d0 ; \ 175 1: movb %%a0@,%%a1@+ ; \ 176 subql #1,%%d0 ; \ 177 jne 1b" : \ 178 : \ 179 "r" ((h) + (o)*4), "g" (a), "g" ((size_t)(c)) : \ 180 "a0","a1","d0","memory"); \ 181 } while (0) 182 183 #define bus_space_read_multi_2(t, h, o, a, c) do { \ 184 (void) t; \ 185 __asm volatile (" \ 186 movl %0,%%a0 ; \ 187 movl %1,%%a1 ; \ 188 movl %2,%%d0 ; \ 189 1: movw %%a0@,%%a1@+ ; \ 190 subql #1,%%d0 ; \ 191 jne 1b" : \ 192 : \ 193 "r" ((h) + (o)*2), "g" (a), "g" ((size_t)(c)) : \ 194 "a0","a1","d0","memory"); \ 195 } while (0) 196 197 #define bus_space_read_multi_4(t, h, o, a, c) do { \ 198 (void) t; \ 199 __asm volatile (" \ 200 movl %0,%%a0 ; \ 201 movl %1,%%a1 ; \ 202 movl %2,%%d0 ; \ 203 1: movl %%a0@,%%a1@+ ; \ 204 subql #1,%%d0 ; \ 205 jne 1b" : \ 206 : \ 207 "r" ((h) + (o)), "g" (a), "g" ((size_t)(c)) : \ 208 "a0","a1","d0","memory"); \ 209 } while (0) 210 211 /* 212 * void bus_space_read_region_N(bus_space_tag_t tag, 213 * bus_space_handle_t bsh, bus_size_t offset, 214 * u_intN_t *addr, size_t count); 215 * 216 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 217 * described by tag/handle and starting at `offset' and copy into 218 * buffer provided. 219 */ 220 221 #define bus_space_read_region_1(t, h, o, a, c) do { \ 222 (void) t; \ 223 __asm volatile (" \ 224 movl %0,%%a0 ; \ 225 movl %1,%%a1 ; \ 226 movl %2,%%d0 ; \ 227 1: movb %%a0@,%%a1@+ ; \ 228 addql #4,%%a0 ; \ 229 subql #1,%%d0 ; \ 230 jne 1b" : \ 231 : \ 232 "r" ((h) + (o)*4), "g" (a), "g" ((size_t)(c)) : \ 233 "a0","a1","d0","memory"); \ 234 } while (0) 235 236 #define bus_space_read_region_2(t, h, o, a, c) do { \ 237 (void) t; \ 238 __asm volatile (" \ 239 movl %0,%%a0 ; \ 240 movl %1,%%a1 ; \ 241 movl %2,%%d0 ; \ 242 1: movw %%a0@,%%a1@+ ; \ 243 addql #4,%%a0 ; \ 244 subql #1,%%d0 ; \ 245 jne 1b" : \ 246 : \ 247 "r" ((h) + (o)*2), "g" (a), "g" ((size_t)(c)) : \ 248 "a0","a1","d0","memory"); \ 249 } while (0) 250 251 #define bus_space_read_region_4(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: movl %%a0@+,%%a1@+ ; \ 258 subql #1,%%d0 ; \ 259 jne 1b" : \ 260 : \ 261 "r" ((h) + (o)), "g" (a), "g" ((size_t)(c)) : \ 262 "a0","a1","d0","memory"); \ 263 } while (0) 264 265 /* 266 * void bus_space_write_N(bus_space_tag_t tag, 267 * bus_space_handle_t bsh, bus_size_t offset, 268 * u_intN_t value); 269 * 270 * Write the 1, 2, 4, or 8 byte value `value' to bus space 271 * described by tag/handle/offset. 272 */ 273 274 #define bus_space_write_1(t, h, o, v) \ 275 ((void) t, ((void)(*(volatile u_int8_t *)((h) + (o)*4) = (v)))) 276 277 #define bus_space_write_2(t, h, o, v) \ 278 ((void) t, ((void)(*(volatile u_int16_t *)((h) + (o)*2) = (v)))) 279 280 #define bus_space_write_4(t, h, o, v) \ 281 ((void) t, ((void)(*(volatile u_int32_t *)((h) + (o)) = (v)))) 282 283 /* 284 * void bus_space_write_multi_N(bus_space_tag_t tag, 285 * bus_space_handle_t bsh, bus_size_t offset, 286 * const u_intN_t *addr, size_t count); 287 * 288 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer 289 * provided to bus space described by tag/handle/offset. 290 */ 291 292 #define bus_space_write_multi_1(t, h, o, a, c) do { \ 293 (void) t; \ 294 __asm volatile (" \ 295 movl %0,%%a0 ; \ 296 movl %1,%%a1 ; \ 297 movl %2,%%d0 ; \ 298 1: movb %%a1@+,%%a0@ ; \ 299 subql #1,%%d0 ; \ 300 jne 1b" : \ 301 : \ 302 "r" ((h) + (o)*4), "g" (a), "g" ((size_t)(c)) : \ 303 "a0","a1","d0"); \ 304 } while (0) 305 306 #define bus_space_write_multi_2(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: movw %%a1@+,%%a0@ ; \ 313 subql #1,%%d0 ; \ 314 jne 1b" : \ 315 : \ 316 "r" ((h) + (o)*2), "g" (a), "g" ((size_t)(c)) : \ 317 "a0","a1","d0"); \ 318 } while (0) 319 320 #define bus_space_write_multi_4(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: movl %%a1@+,%%a0@ ; \ 327 subql #1,%%d0 ; \ 328 jne 1b" : \ 329 : \ 330 "r" ((h) + (o)), "g" (a), "g" ((size_t)(c)) : \ 331 "a0","a1","d0"); \ 332 } while (0) 333 334 /* 335 * void bus_space_write_region_N(bus_space_tag_t tag, 336 * bus_space_handle_t bsh, bus_size_t offset, 337 * const u_intN_t *addr, size_t count); 338 * 339 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided 340 * to bus space described by tag/handle starting at `offset'. 341 */ 342 343 #define bus_space_write_region_1(t, h, o, a, c) do { \ 344 (void) t; \ 345 __asm volatile (" \ 346 movl %0,%%a0 ; \ 347 movl %1,%%a1 ; \ 348 movl %2,%%d0 ; \ 349 1: movb %%a1@+,%%a0@ ; \ 350 addql #4,%%a0 ; \ 351 subql #1,%%d0 ; \ 352 jne 1b" : \ 353 : \ 354 "r" ((h) + (o)*4), "g" (a), "g" ((size_t)(c)) : \ 355 "a0","a1","d0"); \ 356 } while (0) 357 358 #define bus_space_write_region_2(t, h, o, a, c) do { \ 359 (void) t; \ 360 __asm volatile (" \ 361 movl %0,%%a0 ; \ 362 movl %1,%%a1 ; \ 363 movl %2,%%d0 ; \ 364 1: movw %%a1@+,%%a0@ ; \ 365 addql #4,%%a0 ; \ 366 subql #1,%%d0 ; \ 367 jne 1b" : \ 368 : \ 369 "r" ((h) + (o)*2), "g" (a), "g" ((size_t)(c)) : \ 370 "a0","a1","d0"); \ 371 } while (0) 372 373 #define bus_space_write_region_4(t, h, o, a, c) do { \ 374 (void) t; \ 375 __asm volatile (" \ 376 movl %0,%%a0 ; \ 377 movl %1,%%a1 ; \ 378 movl %2,%%d0 ; \ 379 1: movl %%a1@+,%%a0@+ ; \ 380 subql #1,%%d0 ; \ 381 jne 1b" : \ 382 : \ 383 "r" ((h) + (o)), "g" (a), "g" ((size_t)(c)) : \ 384 "a0","a1","d0"); \ 385 } while (0) 386 387 /* 388 * void bus_space_set_multi_N(bus_space_tag_t tag, 389 * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val, 390 * size_t count); 391 * 392 * Write the 1, 2, 4, or 8 byte value `val' to bus space described 393 * by tag/handle/offset `count' times. 394 */ 395 396 #define bus_space_set_multi_1(t, h, o, val, c) do { \ 397 (void) t; \ 398 __asm volatile (" \ 399 movl %0,%%a0 ; \ 400 movl %1,%%d1 ; \ 401 movl %2,%%d0 ; \ 402 1: movb %%d1,%%a0@ ; \ 403 subql #1,%%d0 ; \ 404 jne 1b" : \ 405 : \ 406 "r" ((h)+(o)*4), "g" ((u_long)val), \ 407 "g" ((size_t)(c)) : \ 408 "a0","d0","d1"); \ 409 } while (0) 410 411 #define bus_space_set_multi_2(t, h, o, val, c) do { \ 412 (void) t; \ 413 __asm volatile (" \ 414 movl %0,%%a0 ; \ 415 movl %1,%%d1 ; \ 416 movl %2,%%d0 ; \ 417 1: movw %%d1,%%a0@ ; \ 418 subql #1,%%d0 ; \ 419 jne 1b" : \ 420 : \ 421 "r" ((h)+(o)*2), "g" ((u_long)val), \ 422 "g" ((size_t)(c)) : \ 423 "a0","d0","d1"); \ 424 } while (0) 425 426 #define bus_space_set_multi_4(t, h, o, val, c) do { \ 427 (void) t; \ 428 __asm volatile (" \ 429 movl %0,%%a0 ; \ 430 movl %1,%%d1 ; \ 431 movl %2,%%d0 ; \ 432 1: movl %%d1,%%a0@ ; \ 433 subql #1,%%d0 ; \ 434 jne 1b" : \ 435 : \ 436 "r" ((h)+(o)), "g" ((u_long)val), \ 437 "g" ((size_t)(c)) : \ 438 "a0","d0","d1"); \ 439 } while (0) 440 441 /* 442 * void bus_space_set_region_N(bus_space_tag_t tag, 443 * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val, 444 * size_t count); 445 * 446 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described 447 * by tag/handle starting at `offset'. 448 */ 449 450 #define bus_space_set_region_1(t, h, o, val, c) do { \ 451 (void) t; \ 452 __asm volatile (" \ 453 movl %0,%%a0 ; \ 454 movl %1,%%d1 ; \ 455 movl %2,%%d0 ; \ 456 1: movb %%d1,%%a0@ ; \ 457 addql #4,%%a0 ; \ 458 subql #1,%%d0 ; \ 459 jne 1b" : \ 460 : \ 461 "r" ((h)+(o)*4), "g" ((u_long)val), \ 462 "g" ((size_t)(c)) : \ 463 "a0","d0","d1"); \ 464 } while (0) 465 466 #define bus_space_set_region_2(t, h, o, val, c) do { \ 467 (void) t; \ 468 __asm volatile (" \ 469 movl %0,%%a0 ; \ 470 movl %1,%%d1 ; \ 471 movl %2,%%d0 ; \ 472 1: movw %%d1,%%a0@ ; \ 473 addql #4,%%a0 ; \ 474 subql #1,%%d0 ; \ 475 jne 1b" : \ 476 : \ 477 "r" ((h)+(o)*2), "g" ((u_long)val), \ 478 "g" ((size_t)(c)) : \ 479 "a0","d0","d1"); \ 480 } while (0) 481 482 #define bus_space_set_region_4(t, h, o, val, c) do { \ 483 (void) t; \ 484 __asm volatile (" \ 485 movl %0,%%a0 ; \ 486 movl %1,%%d1 ; \ 487 movl %2,%%d0 ; \ 488 1: movl %%d1,%%a0@+ ; \ 489 subql #1,%%d0 ; \ 490 jne 1b" : \ 491 : \ 492 "r" ((h)+(o)), "g" ((u_long)val), \ 493 "g" ((size_t)(c)) : \ 494 "a0","d0","d1"); \ 495 } while (0) 496 497 /* 498 * void bus_space_copy_N(bus_space_tag_t tag, 499 * bus_space_handle_t bsh1, bus_size_t off1, 500 * bus_space_handle_t bsh2, bus_size_t off2, 501 * size_t count); 502 * 503 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting 504 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. 505 */ 506 507 #define __MACHINE_copy_region_N(BYTES) \ 508 static __inline void __CONCAT(bus_space_copy_region_,BYTES) \ 509 (bus_space_tag_t, \ 510 bus_space_handle_t bsh1, bus_size_t off1, \ 511 bus_space_handle_t bsh2, bus_size_t off2, \ 512 bus_size_t count); \ 513 \ 514 static __inline void \ 515 __CONCAT(bus_space_copy_region_,BYTES)( \ 516 bus_space_tag_t t, \ 517 bus_space_handle_t h1, \ 518 bus_size_t o1, \ 519 bus_space_handle_t h2, \ 520 bus_size_t o2, \ 521 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 __MACHINE_copy_region_N(1) 538 __MACHINE_copy_region_N(2) 539 __MACHINE_copy_region_N(4) 540 541 #undef __MACHINE_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 /* _MACHINE_BUS_H_ */ 566
Indexes created Mon Sep 22 05:09:51 GMT 2025