bus.h revision 1.9
1 /* $NetBSD: bus.h,v 1.9 2001/03/07 22:42:18 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997, 1998, 2001 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #ifndef _HPCMIPS_BUS_H_ 41 #define _HPCMIPS_BUS_H_ 42 43 #include <mips/locore.h> 44 45 #ifdef BUS_SPACE_DEBUG 46 #include <sys/systm.h> /* for printf() prototype */ 47 /* 48 * Macros for sanity-checking the aligned-ness of pointers passed to 49 * bus space ops. These are not strictly necessary on the x86, but 50 * could lead to performance improvements, and help catch problems 51 * with drivers that would creep up on other architectures. 52 */ 53 #define __BUS_SPACE_ALIGNED_ADDRESS(p, t) \ 54 ((((u_long)(p)) & (sizeof(t)-1)) == 0) 55 56 #define __BUS_SPACE_ADDRESS_SANITY(p, t, d) \ 57 ({ \ 58 if (__BUS_SPACE_ALIGNED_ADDRESS((p), t) == 0) { \ 59 printf("%s 0x%lx not aligned to %d bytes %s:%d\n", \ 60 d, (u_long)(p), sizeof(t), __FILE__, __LINE__); \ 61 } \ 62 (void) 0; \ 63 }) 64 65 #define BUS_SPACE_ALIGNED_POINTER(p, t) __BUS_SPACE_ALIGNED_ADDRESS(p, t) 66 #else 67 #define __BUS_SPACE_ADDRESS_SANITY(p,t,d) (void) 0 68 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) 69 #endif /* BUS_SPACE_DEBUG */ 70 /* 71 * Utility macros; do not use outside this file. 72 */ 73 #define __PB_TYPENAME_PREFIX(BITS) ___CONCAT(u_int,BITS) 74 #define __PB_TYPENAME(BITS) ___CONCAT(__PB_TYPENAME_PREFIX(BITS),_t) 75 76 /* 77 * Bus address and size types 78 */ 79 80 typedef u_long bus_addr_t; 81 typedef u_long bus_size_t; 82 83 /* 84 * Access methods for bus resources and address space. 85 */ 86 typedef struct hpcmips_bus_space *bus_space_tag_t; 87 typedef u_int32_t bus_space_handle_t; 88 /* 89 * Initialize extent. 90 */ 91 void hpcmips_init_bus_space_extent __P((bus_space_tag_t)); 92 bus_space_tag_t hpcmips_alloc_bus_space_tag __P((void)); 93 94 struct hpcmips_bus_space { 95 char t_name[16]; /* bus name */ 96 u_int32_t t_base; /* extent base */ 97 u_int32_t t_size; /* extent size */ 98 void *t_extent; 99 }; 100 101 102 /* 103 * int bus_space_map __P((bus_space_tag_t t, bus_addr_t addr, 104 * bus_size_t size, int flags, bus_space_handle_t *bshp)); 105 * 106 * Map a region of bus space. 107 */ 108 109 #define BUS_SPACE_MAP_CACHEABLE 0x01 110 #define BUS_SPACE_MAP_LINEAR 0x02 111 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 112 113 int bus_space_map __P((bus_space_tag_t, bus_addr_t, bus_size_t, 114 int, bus_space_handle_t *)); 115 116 /* 117 * void bus_space_unmap __P((bus_space_tag_t t, 118 * bus_space_handle_t bsh, bus_size_t size)); 119 * 120 * Unmap a region of bus space. 121 */ 122 123 void bus_space_unmap __P((bus_space_tag_t, bus_space_handle_t, bus_size_t)); 124 125 /* 126 * int bus_space_subregion __P((bus_space_tag_t t, 127 * bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, 128 * bus_space_handle_t *nbshp)); 129 * 130 * Get a new handle for a subregion of an already-mapped area of bus space. 131 */ 132 133 int bus_space_subregion __P((bus_space_tag_t t, bus_space_handle_t bsh, 134 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp)); 135 136 /* 137 * int bus_space_alloc __P((bus_space_tag_t t, bus_addr_t, rstart, 138 * bus_addr_t rend, bus_size_t size, bus_size_t align, 139 * bus_size_t boundary, int flags, bus_addr_t *addrp, 140 * bus_space_handle_t *bshp)); 141 * 142 * Allocate a region of bus space. 143 */ 144 145 int bus_space_alloc __P((bus_space_tag_t t, bus_addr_t rstart, 146 bus_addr_t rend, bus_size_t size, bus_size_t align, 147 bus_size_t boundary, int cacheable, bus_addr_t *addrp, 148 bus_space_handle_t *bshp)); 149 150 /* 151 * int bus_space_free __P((bus_space_tag_t t, 152 * bus_space_handle_t bsh, bus_size_t size)); 153 * 154 * Free a region of bus space. 155 */ 156 157 void bus_space_free __P((bus_space_tag_t t, bus_space_handle_t bsh, 158 bus_size_t size)); 159 160 /* 161 * u_intN_t bus_space_read_N __P((bus_space_tag_t tag, 162 * bus_space_handle_t bsh, bus_size_t offset)); 163 * 164 * Read a 1, 2, 4, or 8 byte quantity from bus space 165 * described by tag/handle/offset. 166 */ 167 168 #define bus_space_read_1(t, h, o) \ 169 (wbflush(), /* XXX */ \ 170 (void) t, (*(volatile u_int8_t *)((h) + (o)))) 171 172 #define bus_space_read_2(t, h, o) \ 173 (wbflush(), /* XXX */ \ 174 (void) t, (*(volatile u_int16_t *)((h) + (o)))) 175 176 #define bus_space_read_4(t, h, o) \ 177 (wbflush(), /* XXX */ \ 178 (void) t, (*(volatile u_int32_t *)((h) + (o)))) 179 180 #if 0 /* Cause a link error for bus_space_read_8 */ 181 #define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!! 182 #endif 183 184 /* 185 * void bus_space_read_multi_N __P((bus_space_tag_t tag, 186 * bus_space_handle_t bsh, bus_size_t offset, 187 * u_intN_t *addr, size_t count)); 188 * 189 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 190 * described by tag/handle/offset and copy into buffer provided. 191 */ 192 193 #define __HPCMIPS_bus_space_read_multi(BYTES,BITS) \ 194 static __inline void __CONCAT(bus_space_read_multi_,BYTES) \ 195 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 196 __PB_TYPENAME(BITS) *, size_t)); \ 197 \ 198 static __inline void \ 199 __CONCAT(bus_space_read_multi_,BYTES)(t, h, o, a, c) \ 200 bus_space_tag_t t; \ 201 bus_space_handle_t h; \ 202 bus_size_t o; \ 203 __PB_TYPENAME(BITS) *a; \ 204 size_t c; \ 205 { \ 206 \ 207 while (c--) \ 208 *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \ 209 } 210 211 __HPCMIPS_bus_space_read_multi(1,8) 212 __HPCMIPS_bus_space_read_multi(2,16) 213 __HPCMIPS_bus_space_read_multi(4,32) 214 215 #if 0 /* Cause a link error for bus_space_read_multi_8 */ 216 #define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!! 217 #endif 218 219 #undef __HPCMIPS_bus_space_read_multi 220 221 /* 222 * void bus_space_read_region_N __P((bus_space_tag_t tag, 223 * bus_space_handle_t bsh, bus_size_t offset, 224 * u_intN_t *addr, size_t count)); 225 * 226 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 227 * described by tag/handle and starting at `offset' and copy into 228 * buffer provided. 229 */ 230 231 #define __HPCMIPS_bus_space_read_region(BYTES,BITS) \ 232 static __inline void __CONCAT(bus_space_read_region_,BYTES) \ 233 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 234 __PB_TYPENAME(BITS) *, size_t)); \ 235 \ 236 static __inline void \ 237 __CONCAT(bus_space_read_region_,BYTES)(t, h, o, a, c) \ 238 bus_space_tag_t t; \ 239 bus_space_handle_t h; \ 240 bus_size_t o; \ 241 __PB_TYPENAME(BITS) *a; \ 242 size_t c; \ 243 { \ 244 \ 245 while (c--) { \ 246 *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \ 247 o += BYTES; \ 248 } \ 249 } 250 251 __HPCMIPS_bus_space_read_region(1,8) 252 __HPCMIPS_bus_space_read_region(2,16) 253 __HPCMIPS_bus_space_read_region(4,32) 254 255 #if 0 /* Cause a link error for bus_space_read_region_8 */ 256 #define bus_space_read_region_8 !!! bus_space_read_region_8 unimplemented !!! 257 #endif 258 259 #undef __HPCMIPS_bus_space_read_region 260 261 /* 262 * void bus_space_write_N __P((bus_space_tag_t tag, 263 * bus_space_handle_t bsh, bus_size_t offset, 264 * u_intN_t value)); 265 * 266 * Write the 1, 2, 4, or 8 byte value `value' to bus space 267 * described by tag/handle/offset. 268 */ 269 270 #define bus_space_write_1(t, h, o, v) \ 271 do { \ 272 (void) t; \ 273 *(volatile u_int8_t *)((h) + (o)) = (v); \ 274 wbflush(); /* XXX */ \ 275 } while (0) 276 277 #define bus_space_write_2(t, h, o, v) \ 278 do { \ 279 (void) t; \ 280 *(volatile u_int16_t *)((h) + (o)) = (v); \ 281 wbflush(); /* XXX */ \ 282 } while (0) 283 284 #define bus_space_write_4(t, h, o, v) \ 285 do { \ 286 (void) t; \ 287 *(volatile u_int32_t *)((h) + (o)) = (v); \ 288 wbflush(); /* XXX */ \ 289 } while (0) 290 291 #if 0 /* Cause a link error for bus_space_write_8 */ 292 #define bus_space_write_8 !!! bus_space_write_8 not implemented !!! 293 #endif 294 295 /* 296 * void bus_space_write_multi_N __P((bus_space_tag_t tag, 297 * bus_space_handle_t bsh, bus_size_t offset, 298 * const u_intN_t *addr, size_t count)); 299 * 300 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer 301 * provided to bus space described by tag/handle/offset. 302 */ 303 304 #define __HPCMIPS_bus_space_write_multi(BYTES,BITS) \ 305 static __inline void __CONCAT(bus_space_write_multi_,BYTES) \ 306 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 307 __PB_TYPENAME(BITS) *, size_t)); \ 308 \ 309 static __inline void \ 310 __CONCAT(bus_space_write_multi_,BYTES)(t, h, o, a, c) \ 311 bus_space_tag_t t; \ 312 bus_space_handle_t h; \ 313 bus_size_t o; \ 314 __PB_TYPENAME(BITS) *a; \ 315 size_t c; \ 316 { \ 317 \ 318 while (c--) \ 319 __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \ 320 } 321 322 __HPCMIPS_bus_space_write_multi(1,8) 323 __HPCMIPS_bus_space_write_multi(2,16) 324 __HPCMIPS_bus_space_write_multi(4,32) 325 326 #if 0 /* Cause a link error for bus_space_write_8 */ 327 #define bus_space_write_multi_8(t, h, o, a, c) \ 328 !!! bus_space_write_multi_8 unimplimented !!! 329 #endif 330 331 #undef __HPCMIPS_bus_space_write_multi 332 333 /* 334 * void bus_space_write_region_N __P((bus_space_tag_t tag, 335 * bus_space_handle_t bsh, bus_size_t offset, 336 * const u_intN_t *addr, size_t count)); 337 * 338 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided 339 * to bus space described by tag/handle starting at `offset'. 340 */ 341 342 #define __HPCMIPS_bus_space_write_region(BYTES,BITS) \ 343 static __inline void __CONCAT(bus_space_write_region_,BYTES) \ 344 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 345 __PB_TYPENAME(BITS) *, size_t)); \ 346 \ 347 static __inline void \ 348 __CONCAT(bus_space_write_region_,BYTES)(t, h, o, a, c) \ 349 bus_space_tag_t t; \ 350 bus_space_handle_t h; \ 351 bus_size_t o; \ 352 __PB_TYPENAME(BITS) *a; \ 353 size_t c; \ 354 { \ 355 \ 356 while (c--) { \ 357 __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \ 358 o += BYTES; \ 359 } \ 360 } 361 362 __HPCMIPS_bus_space_write_region(1,8) 363 __HPCMIPS_bus_space_write_region(2,16) 364 __HPCMIPS_bus_space_write_region(4,32) 365 366 #if 0 /* Cause a link error for bus_space_write_region_8 */ 367 #define bus_space_write_region_8 \ 368 !!! bus_space_write_region_8 unimplemented !!! 369 #endif 370 371 #undef __HPCMIPS_bus_space_write_region 372 373 /* 374 * void bus_space_set_multi_N __P((bus_space_tag_t tag, 375 * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val, 376 * size_t count)); 377 * 378 * Write the 1, 2, 4, or 8 byte value `val' to bus space described 379 * by tag/handle/offset `count' times. 380 */ 381 382 #define __HPCMIPS_bus_space_set_multi(BYTES,BITS) \ 383 static __inline void __CONCAT(bus_space_set_multi_,BYTES) \ 384 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 385 __PB_TYPENAME(BITS), size_t)); \ 386 \ 387 static __inline void \ 388 __CONCAT(bus_space_set_multi_,BYTES)(t, h, o, v, c) \ 389 bus_space_tag_t t; \ 390 bus_space_handle_t h; \ 391 bus_size_t o; \ 392 __PB_TYPENAME(BITS) v; \ 393 size_t c; \ 394 { \ 395 \ 396 while (c--) \ 397 __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \ 398 } 399 400 __HPCMIPS_bus_space_set_multi(1,8) 401 __HPCMIPS_bus_space_set_multi(2,16) 402 __HPCMIPS_bus_space_set_multi(4,32) 403 404 #if 0 /* Cause a link error for bus_space_set_multi_8 */ 405 #define bus_space_set_multi_8 \ 406 !!! bus_space_set_multi_8 unimplemented !!! 407 #endif 408 409 #undef __HPCMIPS_bus_space_set_multi 410 411 /* 412 * void bus_space_set_region_N __P((bus_space_tag_t tag, 413 * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val, 414 * size_t count)); 415 * 416 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described 417 * by tag/handle starting at `offset'. 418 */ 419 420 #define __HPCMIPS_bus_space_set_region(BYTES,BITS) \ 421 static __inline void __CONCAT(bus_space_set_region_,BYTES) \ 422 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 423 __PB_TYPENAME(BITS), size_t)); \ 424 \ 425 static __inline void \ 426 __CONCAT(bus_space_set_region_,BYTES)(t, h, o, v, c) \ 427 bus_space_tag_t t; \ 428 bus_space_handle_t h; \ 429 bus_size_t o; \ 430 __PB_TYPENAME(BITS) v; \ 431 size_t c; \ 432 { \ 433 \ 434 while (c--) { \ 435 __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \ 436 o += BYTES; \ 437 } \ 438 } 439 440 __HPCMIPS_bus_space_set_region(1,8) 441 __HPCMIPS_bus_space_set_region(2,16) 442 __HPCMIPS_bus_space_set_region(4,32) 443 444 #if 0 /* Cause a link error for bus_space_set_region_8 */ 445 #define bus_space_set_region_8 \ 446 !!! bus_space_set_region_8 unimplemented !!! 447 #endif 448 449 #undef __HPCMIPS_bus_space_set_region 450 451 /* 452 * void bus_space_copy_region_N __P((bus_space_tag_t tag, 453 * bus_space_handle_t bsh1, bus_size_t off1, 454 * bus_space_handle_t bsh2, bus_size_t off2, 455 * bus_size_t count)); 456 * 457 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting 458 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. 459 */ 460 461 #define __HPCMIPS_copy_region(BYTES) \ 462 static __inline void __CONCAT(bus_space_copy_region_,BYTES) \ 463 __P((bus_space_tag_t, \ 464 bus_space_handle_t bsh1, bus_size_t off1, \ 465 bus_space_handle_t bsh2, bus_size_t off2, \ 466 bus_size_t count)); \ 467 \ 468 static __inline void \ 469 __CONCAT(bus_space_copy_region_,BYTES)(t, h1, o1, h2, o2, c) \ 470 bus_space_tag_t t; \ 471 bus_space_handle_t h1, h2; \ 472 bus_size_t o1, o2, c; \ 473 { \ 474 bus_size_t o; \ 475 \ 476 if ((h1 + o1) >= (h2 + o2)) { \ 477 /* src after dest: copy forward */ \ 478 for (o = 0; c != 0; c--, o += BYTES) \ 479 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ 480 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ 481 } else { \ 482 /* dest after src: copy backwards */ \ 483 for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \ 484 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ 485 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ 486 } \ 487 } 488 489 __HPCMIPS_copy_region(1) 490 __HPCMIPS_copy_region(2) 491 __HPCMIPS_copy_region(4) 492 493 #if 0 /* Cause a link error for bus_space_copy_region_8 */ 494 #define bus_space_copy_region_8 \ 495 !!! bus_space_copy_region_8 unimplemented !!! 496 #endif 497 498 #undef __HPCMIPS_copy_region 499 500 /* 501 * Bus read/write barrier methods. 502 * 503 * void bus_space_barrier __P((bus_space_tag_t tag, 504 * bus_space_handle_t bsh, bus_size_t offset, 505 * bus_size_t len, int flags)); 506 * 507 * On the MIPS, we just flush the write buffer. 508 */ 509 #define bus_space_barrier(t, h, o, l, f) \ 510 ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f)), \ 511 wbflush()) 512 #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */ 513 #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */ 514 515 #undef __PB_TYPENAME_PREFIX 516 #undef __PB_TYPENAME 517 518 /* 519 * Bus stream operations--defined in terms of non-stream counterparts 520 */ 521 #define __BUS_SPACE_HAS_STREAM_METHODS 1 522 #define bus_space_read_stream_1 bus_space_read_1 523 #define bus_space_read_stream_2 bus_space_read_2 524 #define bus_space_read_stream_4 bus_space_read_4 525 #define bus_space_read_stream_8 bus_space_read_8 526 #define bus_space_read_multi_stream_1 bus_space_read_multi_1 527 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 528 #define bus_space_read_multi_stream_4 bus_space_read_multi_4 529 #define bus_space_read_multi_stream_8 bus_space_read_multi_8 530 #define bus_space_read_region_stream_1 bus_space_read_region_1 531 #define bus_space_read_region_stream_2 bus_space_read_region_2 532 #define bus_space_read_region_stream_4 bus_space_read_region_4 533 #define bus_space_read_region_stream_8 bus_space_read_region_8 534 #define bus_space_write_stream_1 bus_space_write_1 535 #define bus_space_write_stream_2 bus_space_write_2 536 #define bus_space_write_stream_4 bus_space_write_4 537 #define bus_space_write_stream_8 bus_space_write_8 538 #define bus_space_write_multi_stream_1 bus_space_write_multi_1 539 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 540 #define bus_space_write_multi_stream_4 bus_space_write_multi_4 541 #define bus_space_write_multi_stream_8 bus_space_write_multi_8 542 #define bus_space_write_region_stream_1 bus_space_write_region_1 543 #define bus_space_write_region_stream_2 bus_space_write_region_2 544 #define bus_space_write_region_stream_4 bus_space_write_region_4 545 #define bus_space_write_region_stream_8 bus_space_write_region_8 546 547 /* 548 * Flags used in various bus DMA methods. 549 */ 550 #define BUS_DMA_WAITOK 0x00 /* safe to sleep (pseudo-flag) */ 551 #define BUS_DMA_NOWAIT 0x01 /* not safe to sleep */ 552 #define BUS_DMA_ALLOCNOW 0x02 /* perform resource allocation now */ 553 #define BUS_DMA_COHERENT 0x04 /* hint: map memory DMA coherent */ 554 #define BUS_DMA_STREAMING 0x08 /* hint: sequential, unidirectional */ 555 #define BUS_DMA_BUS1 0x10 /* placeholders for bus functions... */ 556 #define BUS_DMA_BUS2 0x20 557 #define BUS_DMA_BUS3 0x40 558 #define BUS_DMA_BUS4 0x80 559 560 #define HPCMIPS_DMAMAP_COHERENT 0x100 /* no cache flush necessary on sync */ 561 562 /* Forwards needed by prototypes below. */ 563 struct mbuf; 564 struct uio; 565 566 /* 567 * Operations performed by bus_dmamap_sync(). 568 */ 569 #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ 570 #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ 571 #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ 572 #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ 573 574 typedef struct hpcmips_bus_dma_tag *bus_dma_tag_t; 575 typedef struct hpcmips_bus_dmamap *bus_dmamap_t; 576 577 /* 578 * bus_dma_segment_t 579 * 580 * Describes a single contiguous DMA transaction. Values 581 * are suitable for programming into DMA registers. 582 */ 583 struct hpcmips_bus_dma_segment { 584 bus_addr_t ds_addr; /* DMA address */ 585 bus_size_t ds_len; /* length of transfer */ 586 bus_addr_t _ds_vaddr; /* virtual address, 0 if invalid */ 587 }; 588 typedef struct hpcmips_bus_dma_segment bus_dma_segment_t; 589 590 /* 591 * bus_dma_tag_t 592 * 593 * A machine-dependent opaque type describing the implementation of 594 * DMA for a given bus. 595 */ 596 597 struct hpcmips_bus_dma_tag { 598 /* 599 * DMA mapping methods. 600 */ 601 int (*_dmamap_create) __P((bus_dma_tag_t, bus_size_t, int, 602 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 603 void (*_dmamap_destroy) __P((bus_dma_tag_t, bus_dmamap_t)); 604 int (*_dmamap_load) __P((bus_dma_tag_t, bus_dmamap_t, void *, 605 bus_size_t, struct proc *, int)); 606 int (*_dmamap_load_mbuf) __P((bus_dma_tag_t, bus_dmamap_t, 607 struct mbuf *, int)); 608 int (*_dmamap_load_uio) __P((bus_dma_tag_t, bus_dmamap_t, 609 struct uio *, int)); 610 int (*_dmamap_load_raw) __P((bus_dma_tag_t, bus_dmamap_t, 611 bus_dma_segment_t *, int, bus_size_t, int)); 612 void (*_dmamap_unload) __P((bus_dma_tag_t, bus_dmamap_t)); 613 void (*_dmamap_sync) __P((bus_dma_tag_t, bus_dmamap_t, 614 bus_addr_t, bus_size_t, int)); 615 616 /* 617 * DMA memory utility functions. 618 */ 619 int (*_dmamem_alloc) __P((bus_dma_tag_t, bus_size_t, bus_size_t, 620 bus_size_t, bus_dma_segment_t *, int, int *, int)); 621 void (*_dmamem_free) __P((bus_dma_tag_t, 622 bus_dma_segment_t *, int)); 623 int (*_dmamem_map) __P((bus_dma_tag_t, bus_dma_segment_t *, 624 int, size_t, caddr_t *, int)); 625 void (*_dmamem_unmap) __P((bus_dma_tag_t, caddr_t, size_t)); 626 paddr_t (*_dmamem_mmap) __P((bus_dma_tag_t, bus_dma_segment_t *, 627 int, off_t, int, int)); 628 629 void *_dmamap_chipset_v; 630 }; 631 632 #define bus_dmamap_create(t, s, n, m, b, f, p) \ 633 (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) 634 #define bus_dmamap_destroy(t, p) \ 635 (*(t)->_dmamap_destroy)((t), (p)) 636 #define bus_dmamap_load(t, m, b, s, p, f) \ 637 (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) 638 #define bus_dmamap_load_mbuf(t, m, b, f) \ 639 (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) 640 #define bus_dmamap_load_uio(t, m, u, f) \ 641 (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) 642 #define bus_dmamap_load_raw(t, m, sg, n, s, f) \ 643 (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) 644 #define bus_dmamap_unload(t, p) \ 645 (*(t)->_dmamap_unload)((t), (p)) 646 #define bus_dmamap_sync(t, p, o, l, ops) \ 647 (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops)) 648 649 #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ 650 (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) 651 #define bus_dmamem_free(t, sg, n) \ 652 (*(t)->_dmamem_free)((t), (sg), (n)) 653 #define bus_dmamem_map(t, sg, n, s, k, f) \ 654 (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) 655 #define bus_dmamem_unmap(t, k, s) \ 656 (*(t)->_dmamem_unmap)((t), (k), (s)) 657 #define bus_dmamem_mmap(t, sg, n, o, p, f) \ 658 (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) 659 660 /* 661 * bus_dmamap_t 662 * 663 * Describes a DMA mapping. 664 */ 665 struct hpcmips_bus_dmamap { 666 /* 667 * PRIVATE MEMBERS: not for use my machine-independent code. 668 */ 669 bus_size_t _dm_size; /* largest DMA transfer mappable */ 670 int _dm_segcnt; /* number of segs this map can map */ 671 bus_size_t _dm_maxsegsz; /* largest possible segment */ 672 bus_size_t _dm_boundary; /* don't cross this */ 673 int _dm_flags; /* misc. flags */ 674 675 /* 676 * PUBLIC MEMBERS: these are used by machine-independent code. 677 */ 678 bus_size_t dm_mapsize; /* size of the mapping */ 679 int dm_nsegs; /* # valid segments in mapping */ 680 bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 681 }; 682 683 #ifdef _HPCMIPS_BUS_DMA_PRIVATE 684 int _bus_dmamap_create __P((bus_dma_tag_t, bus_size_t, int, bus_size_t, 685 bus_size_t, int, bus_dmamap_t *)); 686 void _bus_dmamap_destroy __P((bus_dma_tag_t, bus_dmamap_t)); 687 int _bus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *, 688 bus_size_t, struct proc *, int)); 689 int _bus_dmamap_load_mbuf __P((bus_dma_tag_t, bus_dmamap_t, 690 struct mbuf *, int)); 691 int _bus_dmamap_load_uio __P((bus_dma_tag_t, bus_dmamap_t, 692 struct uio *, int)); 693 int _bus_dmamap_load_raw __P((bus_dma_tag_t, bus_dmamap_t, 694 bus_dma_segment_t *, int, bus_size_t, int)); 695 void _bus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t)); 696 void _bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 697 bus_size_t, int)); 698 699 int _bus_dmamem_alloc __P((bus_dma_tag_t tag, bus_size_t size, 700 bus_size_t alignment, bus_size_t boundary, 701 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags)); 702 void _bus_dmamem_free __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 703 int nsegs)); 704 int _bus_dmamem_map __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 705 int nsegs, size_t size, caddr_t *kvap, int flags)); 706 void _bus_dmamem_unmap __P((bus_dma_tag_t tag, caddr_t kva, 707 size_t size)); 708 paddr_t _bus_dmamem_mmap __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 709 int nsegs, off_t off, int prot, int flags)); 710 711 int _bus_dmamem_alloc_range __P((bus_dma_tag_t tag, bus_size_t size, 712 bus_size_t alignment, bus_size_t boundary, 713 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, 714 vaddr_t low, vaddr_t high)); 715 716 extern struct hpcmips_bus_dma_tag hpcmips_default_bus_dma_tag; 717 #endif /* _HPCMIPS_BUS_DMA_PRIVATE */ 718 719 #endif /* _HPCMIPS_BUS_H_ */ 720
Indexes created Sun Sep 28 16:09:52 GMT 2025