1 /* $NetBSD: bus.h,v 1.25 2006/05/26 13:23:34 tsutsui 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 _PMAX_BUS_H_ 41 #define _PMAX_BUS_H_ 42 43 #include <mips/locore.h> 44 45 /* 46 * Utility macros; do not use outside this file. 47 */ 48 #define __PB_TYPENAME_PREFIX(BITS) ___CONCAT(u_int,BITS) 49 #define __PB_TYPENAME(BITS) ___CONCAT(__PB_TYPENAME_PREFIX(BITS),_t) 50 51 /* 52 * Bus address and size types 53 */ 54 typedef u_long bus_addr_t; 55 typedef u_long bus_size_t; 56 57 /* 58 * Access methods for bus resources and address space. 59 */ 60 typedef int bus_space_tag_t; 61 typedef u_long bus_space_handle_t; 62 63 /* 64 * int bus_space_map __P((bus_space_tag_t t, bus_addr_t addr, 65 * bus_size_t size, int flags, bus_space_handle_t *bshp)); 66 * 67 * Map a region of bus space. 68 */ 69 70 #define BUS_SPACE_MAP_CACHEABLE 0x01 71 #define BUS_SPACE_MAP_LINEAR 0x02 72 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 73 74 int bus_space_map __P((bus_space_tag_t, bus_addr_t, bus_size_t, 75 int, bus_space_handle_t *)); 76 77 /* 78 * void bus_space_unmap __P((bus_space_tag_t t, 79 * bus_space_handle_t bsh, bus_size_t size)); 80 * 81 * Unmap a region of bus space. 82 */ 83 84 void bus_space_unmap __P((bus_space_tag_t, bus_space_handle_t, bus_size_t)); 85 86 /* 87 * int bus_space_subregion __P((bus_space_tag_t t, 88 * bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, 89 * bus_space_handle_t *nbshp)); 90 * 91 * Get a new handle for a subregion of an already-mapped area of bus space. 92 */ 93 94 int bus_space_subregion __P((bus_space_tag_t t, bus_space_handle_t bsh, 95 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp)); 96 97 /* 98 * int bus_space_alloc __P((bus_space_tag_t t, bus_addr_t, rstart, 99 * bus_addr_t rend, bus_size_t size, bus_size_t align, 100 * bus_size_t boundary, int flags, bus_addr_t *addrp, 101 * bus_space_handle_t *bshp)); 102 * 103 * Allocate a region of bus space. 104 */ 105 106 int bus_space_alloc __P((bus_space_tag_t t, bus_addr_t rstart, 107 bus_addr_t rend, bus_size_t size, bus_size_t align, 108 bus_size_t boundary, int cacheable, bus_addr_t *addrp, 109 bus_space_handle_t *bshp)); 110 111 /* 112 * int bus_space_free __P((bus_space_tag_t t, 113 * bus_space_handle_t bsh, bus_size_t size)); 114 * 115 * Free a region of bus space. 116 */ 117 118 void bus_space_free __P((bus_space_tag_t t, bus_space_handle_t bsh, 119 bus_size_t size)); 120 121 /* 122 * void *bus_space_vaddr __P((bus_space_tag_t, bus_space_handle_t)); 123 * 124 * Get the kernel virtual address for the mapped bus space. 125 * Only allowed for regions mapped with BUS_SPACE_MAP_LINEAR. 126 * (XXX not enforced) 127 */ 128 #define bus_space_vaddr(t, h) \ 129 ((void *)(h)) 130 131 /* 132 * u_intN_t bus_space_read_N __P((bus_space_tag_t tag, 133 * bus_space_handle_t bsh, bus_size_t offset)); 134 * 135 * Read a 1, 2, 4, or 8 byte quantity from bus space 136 * described by tag/handle/offset. 137 */ 138 139 #define bus_space_read_1(t, h, o) \ 140 ((void) t, (*(volatile u_int8_t *)((h) + (o)))) 141 142 #define bus_space_read_2(t, h, o) \ 143 ((void) t, (*(volatile u_int16_t *)((h) + (o)))) 144 145 #define bus_space_read_4(t, h, o) \ 146 ((void) t, (*(volatile u_int32_t *)((h) + (o)))) 147 148 #if 0 /* Cause a link error for bus_space_read_8 */ 149 #define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!! 150 #endif 151 152 /* 153 * void bus_space_read_multi_N __P((bus_space_tag_t tag, 154 * bus_space_handle_t bsh, bus_size_t offset, 155 * u_intN_t *addr, size_t count)); 156 * 157 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 158 * described by tag/handle/offset and copy into buffer provided. 159 */ 160 161 #define __PMAX_bus_space_read_multi(BYTES,BITS) \ 162 static __inline void __CONCAT(bus_space_read_multi_,BYTES) \ 163 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 164 __PB_TYPENAME(BITS) *, size_t)); \ 165 \ 166 static __inline void \ 167 __CONCAT(bus_space_read_multi_,BYTES)(t, h, o, a, c) \ 168 bus_space_tag_t t; \ 169 bus_space_handle_t h; \ 170 bus_size_t o; \ 171 __PB_TYPENAME(BITS) *a; \ 172 size_t c; \ 173 { \ 174 \ 175 while (c--) \ 176 *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \ 177 } 178 179 __PMAX_bus_space_read_multi(1,8) 180 __PMAX_bus_space_read_multi(2,16) 181 __PMAX_bus_space_read_multi(4,32) 182 183 #if 0 /* Cause a link error for bus_space_read_multi_8 */ 184 #define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!! 185 #endif 186 187 #undef __PMAX_bus_space_read_multi 188 189 /* 190 * void bus_space_read_region_N __P((bus_space_tag_t tag, 191 * bus_space_handle_t bsh, bus_size_t offset, 192 * u_intN_t *addr, size_t count)); 193 * 194 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 195 * described by tag/handle and starting at `offset' and copy into 196 * buffer provided. 197 */ 198 199 #define __PMAX_bus_space_read_region(BYTES,BITS) \ 200 static __inline void __CONCAT(bus_space_read_region_,BYTES) \ 201 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 202 __PB_TYPENAME(BITS) *, size_t)); \ 203 \ 204 static __inline void \ 205 __CONCAT(bus_space_read_region_,BYTES)(t, h, o, a, c) \ 206 bus_space_tag_t t; \ 207 bus_space_handle_t h; \ 208 bus_size_t o; \ 209 __PB_TYPENAME(BITS) *a; \ 210 size_t c; \ 211 { \ 212 \ 213 while (c--) { \ 214 *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \ 215 o += BYTES; \ 216 } \ 217 } 218 219 __PMAX_bus_space_read_region(1,8) 220 __PMAX_bus_space_read_region(2,16) 221 __PMAX_bus_space_read_region(4,32) 222 223 #if 0 /* Cause a link error for bus_space_read_region_8 */ 224 #define bus_space_read_region_8 !!! bus_space_read_region_8 unimplemented !!! 225 #endif 226 227 #undef __PMAX_bus_space_read_region 228 229 /* 230 * void bus_space_write_N __P((bus_space_tag_t tag, 231 * bus_space_handle_t bsh, bus_size_t offset, 232 * u_intN_t value)); 233 * 234 * Write the 1, 2, 4, or 8 byte value `value' to bus space 235 * described by tag/handle/offset. 236 */ 237 238 #define bus_space_write_1(t, h, o, v) \ 239 do { \ 240 (void) t; \ 241 *(volatile u_int8_t *)((h) + (o)) = (v); \ 242 wbflush(); /* XXX */ \ 243 } while (0) 244 245 #define bus_space_write_2(t, h, o, v) \ 246 do { \ 247 (void) t; \ 248 *(volatile u_int16_t *)((h) + (o)) = (v); \ 249 wbflush(); /* XXX */ \ 250 } while (0) 251 252 #define bus_space_write_4(t, h, o, v) \ 253 do { \ 254 (void) t; \ 255 *(volatile u_int32_t *)((h) + (o)) = (v); \ 256 wbflush(); /* XXX */ \ 257 } while (0) 258 259 #if 0 /* Cause a link error for bus_space_write_8 */ 260 #define bus_space_write_8 !!! bus_space_write_8 not implemented !!! 261 #endif 262 263 /* 264 * void bus_space_write_multi_N __P((bus_space_tag_t tag, 265 * bus_space_handle_t bsh, bus_size_t offset, 266 * const u_intN_t *addr, size_t count)); 267 * 268 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer 269 * provided to bus space described by tag/handle/offset. 270 */ 271 272 #define __PMAX_bus_space_write_multi(BYTES,BITS) \ 273 static __inline void __CONCAT(bus_space_write_multi_,BYTES) \ 274 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 275 __PB_TYPENAME(BITS) *, size_t)); \ 276 \ 277 static __inline void \ 278 __CONCAT(bus_space_write_multi_,BYTES)(t, h, o, a, c) \ 279 bus_space_tag_t t; \ 280 bus_space_handle_t h; \ 281 bus_size_t o; \ 282 __PB_TYPENAME(BITS) *a; \ 283 size_t c; \ 284 { \ 285 \ 286 while (c--) \ 287 __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \ 288 } 289 290 __PMAX_bus_space_write_multi(1,8) 291 __PMAX_bus_space_write_multi(2,16) 292 __PMAX_bus_space_write_multi(4,32) 293 294 #if 0 /* Cause a link error for bus_space_write_8 */ 295 #define bus_space_write_multi_8(t, h, o, a, c) \ 296 !!! bus_space_write_multi_8 unimplimented !!! 297 #endif 298 299 #undef __PMAX_bus_space_write_multi 300 301 /* 302 * void bus_space_write_region_N __P((bus_space_tag_t tag, 303 * bus_space_handle_t bsh, bus_size_t offset, 304 * const u_intN_t *addr, size_t count)); 305 * 306 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided 307 * to bus space described by tag/handle starting at `offset'. 308 */ 309 310 #define __PMAX_bus_space_write_region(BYTES,BITS) \ 311 static __inline void __CONCAT(bus_space_write_region_,BYTES) \ 312 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 313 __PB_TYPENAME(BITS) *, size_t)); \ 314 \ 315 static __inline void \ 316 __CONCAT(bus_space_write_region_,BYTES)(t, h, o, a, c) \ 317 bus_space_tag_t t; \ 318 bus_space_handle_t h; \ 319 bus_size_t o; \ 320 __PB_TYPENAME(BITS) *a; \ 321 size_t c; \ 322 { \ 323 \ 324 while (c--) { \ 325 __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \ 326 o += BYTES; \ 327 } \ 328 } 329 330 __PMAX_bus_space_write_region(1,8) 331 __PMAX_bus_space_write_region(2,16) 332 __PMAX_bus_space_write_region(4,32) 333 334 #if 0 /* Cause a link error for bus_space_write_region_8 */ 335 #define bus_space_write_region_8 \ 336 !!! bus_space_write_region_8 unimplemented !!! 337 #endif 338 339 #undef __PMAX_bus_space_write_region 340 341 /* 342 * void bus_space_set_multi_N __P((bus_space_tag_t tag, 343 * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val, 344 * size_t count)); 345 * 346 * Write the 1, 2, 4, or 8 byte value `val' to bus space described 347 * by tag/handle/offset `count' times. 348 */ 349 350 #define __PMAX_bus_space_set_multi(BYTES,BITS) \ 351 static __inline void __CONCAT(bus_space_set_multi_,BYTES) \ 352 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 353 __PB_TYPENAME(BITS), size_t)); \ 354 \ 355 static __inline void \ 356 __CONCAT(bus_space_set_multi_,BYTES)(t, h, o, v, c) \ 357 bus_space_tag_t t; \ 358 bus_space_handle_t h; \ 359 bus_size_t o; \ 360 __PB_TYPENAME(BITS) v; \ 361 size_t c; \ 362 { \ 363 \ 364 while (c--) \ 365 __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \ 366 } 367 368 __PMAX_bus_space_set_multi(1,8) 369 __PMAX_bus_space_set_multi(2,16) 370 __PMAX_bus_space_set_multi(4,32) 371 372 #if 0 /* Cause a link error for bus_space_set_multi_8 */ 373 #define bus_space_set_multi_8 \ 374 !!! bus_space_set_multi_8 unimplemented !!! 375 #endif 376 377 #undef __PMAX_bus_space_set_multi 378 379 /* 380 * void bus_space_set_region_N __P((bus_space_tag_t tag, 381 * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val, 382 * size_t count)); 383 * 384 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described 385 * by tag/handle starting at `offset'. 386 */ 387 388 #define __PMAX_bus_space_set_region(BYTES,BITS) \ 389 static __inline void __CONCAT(bus_space_set_region_,BYTES) \ 390 __P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 391 __PB_TYPENAME(BITS), size_t)); \ 392 \ 393 static __inline void \ 394 __CONCAT(bus_space_set_region_,BYTES)(t, h, o, v, c) \ 395 bus_space_tag_t t; \ 396 bus_space_handle_t h; \ 397 bus_size_t o; \ 398 __PB_TYPENAME(BITS) v; \ 399 size_t c; \ 400 { \ 401 \ 402 while (c--) { \ 403 __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \ 404 o += BYTES; \ 405 } \ 406 } 407 408 __PMAX_bus_space_set_region(1,8) 409 __PMAX_bus_space_set_region(2,16) 410 __PMAX_bus_space_set_region(4,32) 411 412 #if 0 /* Cause a link error for bus_space_set_region_8 */ 413 #define bus_space_set_region_8 \ 414 !!! bus_space_set_region_8 unimplemented !!! 415 #endif 416 417 #undef __PMAX_bus_space_set_region 418 419 /* 420 * void bus_space_copy_region_N __P((bus_space_tag_t tag, 421 * bus_space_handle_t bsh1, bus_size_t off1, 422 * bus_space_handle_t bsh2, bus_size_t off2, 423 * bus_size_t count)); 424 * 425 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting 426 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. 427 */ 428 429 #define __PMAX_copy_region(BYTES) \ 430 static __inline void __CONCAT(bus_space_copy_region_,BYTES) \ 431 __P((bus_space_tag_t, \ 432 bus_space_handle_t bsh1, bus_size_t off1, \ 433 bus_space_handle_t bsh2, bus_size_t off2, \ 434 bus_size_t count)); \ 435 \ 436 static __inline void \ 437 __CONCAT(bus_space_copy_region_,BYTES)(t, h1, o1, h2, o2, c) \ 438 bus_space_tag_t t; \ 439 bus_space_handle_t h1, h2; \ 440 bus_size_t o1, o2, c; \ 441 { \ 442 bus_size_t o; \ 443 \ 444 if ((h1 + o1) >= (h2 + o2)) { \ 445 /* src after dest: copy forward */ \ 446 for (o = 0; c != 0; c--, o += BYTES) \ 447 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ 448 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ 449 } else { \ 450 /* dest after src: copy backwards */ \ 451 for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \ 452 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ 453 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ 454 } \ 455 } 456 457 __PMAX_copy_region(1) 458 __PMAX_copy_region(2) 459 __PMAX_copy_region(4) 460 461 #if 0 /* Cause a link error for bus_space_copy_region_8 */ 462 #define bus_space_copy_region_8 \ 463 !!! bus_space_copy_region_8 unimplemented !!! 464 #endif 465 466 #undef __PMAX_copy_region 467 468 /* 469 * Bus read/write barrier methods. 470 * 471 * void bus_space_barrier __P((bus_space_tag_t tag, 472 * bus_space_handle_t bsh, bus_size_t offset, 473 * bus_size_t len, int flags)); 474 * 475 * On the MIPS, we just flush the write buffer. 476 */ 477 #define bus_space_barrier(t, h, o, l, f) \ 478 ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f), \ 479 wbflush())) 480 #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */ 481 #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */ 482 483 #undef __PB_TYPENAME_PREFIX 484 #undef __PB_TYPENAME 485 486 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) 487 488 /* 489 * Flags used in various bus DMA methods. 490 */ 491 #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */ 492 #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */ 493 #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */ 494 #define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */ 495 #define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */ 496 #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */ 497 #define BUS_DMA_BUS2 0x020 498 #define BUS_DMA_BUS3 0x040 499 #define BUS_DMA_BUS4 0x080 500 #define BUS_DMA_READ 0x100 /* mapping is device -> memory only */ 501 #define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */ 502 #define BUS_DMA_NOCACHE 0x400 /* hint: map non-cached memory */ 503 504 #define PMAX_DMAMAP_COHERENT 0x10000 /* no cache flush necessary on sync */ 505 506 /* Forwards needed by prototypes below. */ 507 struct mbuf; 508 struct uio; 509 510 /* 511 * Operations performed by bus_dmamap_sync(). 512 */ 513 #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ 514 #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ 515 #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ 516 #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ 517 518 typedef struct pmax_bus_dma_tag *bus_dma_tag_t; 519 typedef struct pmax_bus_dmamap *bus_dmamap_t; 520 521 #define BUS_DMA_TAG_VALID(t) ((t) != (bus_dma_tag_t)0) 522 523 /* 524 * bus_dma_segment_t 525 * 526 * Describes a single contiguous DMA transaction. Values 527 * are suitable for programming into DMA registers. 528 */ 529 struct pmax_bus_dma_segment { 530 bus_addr_t ds_addr; /* DMA address */ 531 bus_size_t ds_len; /* length of transfer */ 532 bus_addr_t _ds_vaddr; /* virtual address, 0 if invalid */ 533 }; 534 typedef struct pmax_bus_dma_segment bus_dma_segment_t; 535 536 /* 537 * bus_dma_tag_t 538 * 539 * A machine-dependent opaque type describing the implementation of 540 * DMA for a given bus. 541 */ 542 543 struct pmax_bus_dma_tag { 544 /* 545 * DMA mapping methods. 546 */ 547 int (*_dmamap_create) __P((bus_dma_tag_t, bus_size_t, int, 548 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 549 void (*_dmamap_destroy) __P((bus_dma_tag_t, bus_dmamap_t)); 550 int (*_dmamap_load) __P((bus_dma_tag_t, bus_dmamap_t, void *, 551 bus_size_t, struct proc *, int)); 552 int (*_dmamap_load_mbuf) __P((bus_dma_tag_t, bus_dmamap_t, 553 struct mbuf *, int)); 554 int (*_dmamap_load_uio) __P((bus_dma_tag_t, bus_dmamap_t, 555 struct uio *, int)); 556 int (*_dmamap_load_raw) __P((bus_dma_tag_t, bus_dmamap_t, 557 bus_dma_segment_t *, int, bus_size_t, int)); 558 void (*_dmamap_unload) __P((bus_dma_tag_t, bus_dmamap_t)); 559 void (*_dmamap_sync) __P((bus_dma_tag_t, bus_dmamap_t, 560 bus_addr_t, bus_size_t, int)); 561 562 /* 563 * DMA memory utility functions. 564 */ 565 int (*_dmamem_alloc) __P((bus_dma_tag_t, bus_size_t, bus_size_t, 566 bus_size_t, bus_dma_segment_t *, int, int *, int)); 567 void (*_dmamem_free) __P((bus_dma_tag_t, 568 bus_dma_segment_t *, int)); 569 int (*_dmamem_map) __P((bus_dma_tag_t, bus_dma_segment_t *, 570 int, size_t, caddr_t *, int)); 571 void (*_dmamem_unmap) __P((bus_dma_tag_t, caddr_t, size_t)); 572 paddr_t (*_dmamem_mmap) __P((bus_dma_tag_t, bus_dma_segment_t *, 573 int, off_t, int, int)); 574 }; 575 576 #define bus_dmamap_create(t, s, n, m, b, f, p) \ 577 (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) 578 #define bus_dmamap_destroy(t, p) \ 579 (*(t)->_dmamap_destroy)((t), (p)) 580 #define bus_dmamap_load(t, m, b, s, p, f) \ 581 (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) 582 #define bus_dmamap_load_mbuf(t, m, b, f) \ 583 (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) 584 #define bus_dmamap_load_uio(t, m, u, f) \ 585 (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) 586 #define bus_dmamap_load_raw(t, m, sg, n, s, f) \ 587 (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) 588 #define bus_dmamap_unload(t, p) \ 589 (*(t)->_dmamap_unload)((t), (p)) 590 #define bus_dmamap_sync(t, p, o, l, ops) \ 591 (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops)) 592 593 #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ 594 (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) 595 #define bus_dmamem_free(t, sg, n) \ 596 (*(t)->_dmamem_free)((t), (sg), (n)) 597 #define bus_dmamem_map(t, sg, n, s, k, f) \ 598 (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) 599 #define bus_dmamem_unmap(t, k, s) \ 600 (*(t)->_dmamem_unmap)((t), (k), (s)) 601 #define bus_dmamem_mmap(t, sg, n, o, p, f) \ 602 (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) 603 604 /* 605 * bus_dmamap_t 606 * 607 * Describes a DMA mapping. 608 */ 609 struct pmax_bus_dmamap { 610 /* 611 * PRIVATE MEMBERS: not for use my machine-independent code. 612 */ 613 bus_size_t _dm_size; /* largest DMA transfer mappable */ 614 int _dm_segcnt; /* number of segs this map can map */ 615 bus_size_t _dm_maxmaxsegsz; /* fixed largest possible segment */ 616 bus_size_t _dm_boundary; /* don't cross this */ 617 int _dm_flags; /* misc. flags */ 618 struct vmspace *_dm_vmspace; /* vmspace that owns the mapping */ 619 620 /* 621 * PUBLIC MEMBERS: these are used by machine-independent code. 622 */ 623 bus_size_t dm_maxsegsz; /* largest possible segment */ 624 bus_size_t dm_mapsize; /* size of the mapping */ 625 int dm_nsegs; /* # valid segments in mapping */ 626 bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 627 }; 628 629 #ifdef _PMAX_BUS_DMA_PRIVATE 630 void pmax_bus_dma_init(void); 631 632 int _bus_dmamap_create __P((bus_dma_tag_t, bus_size_t, int, bus_size_t, 633 bus_size_t, int, bus_dmamap_t *)); 634 void _bus_dmamap_destroy __P((bus_dma_tag_t, bus_dmamap_t)); 635 int _bus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *, 636 bus_size_t, struct proc *, int)); 637 int _bus_dmamap_load_mbuf __P((bus_dma_tag_t, bus_dmamap_t, 638 struct mbuf *, int)); 639 int _bus_dmamap_load_uio __P((bus_dma_tag_t, bus_dmamap_t, 640 struct uio *, int)); 641 int _bus_dmamap_load_raw __P((bus_dma_tag_t, bus_dmamap_t, 642 bus_dma_segment_t *, int, bus_size_t, int)); 643 void _bus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t)); 644 void _bus_dmamap_sync_r3k __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 645 bus_size_t, int)); 646 void _bus_dmamap_sync_r4k __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 647 bus_size_t, int)); 648 649 int _bus_dmamem_alloc __P((bus_dma_tag_t tag, bus_size_t size, 650 bus_size_t alignment, bus_size_t boundary, 651 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags)); 652 void _bus_dmamem_free __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 653 int nsegs)); 654 int _bus_dmamem_map __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 655 int nsegs, size_t size, caddr_t *kvap, int flags)); 656 void _bus_dmamem_unmap __P((bus_dma_tag_t tag, caddr_t kva, 657 size_t size)); 658 paddr_t _bus_dmamem_mmap __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 659 int nsegs, off_t off, int prot, int flags)); 660 661 int _bus_dmamem_alloc_range __P((bus_dma_tag_t tag, bus_size_t size, 662 bus_size_t alignment, bus_size_t boundary, 663 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, 664 vaddr_t low, vaddr_t high)); 665 666 extern struct pmax_bus_dma_tag pmax_default_bus_dma_tag; 667 #endif /* _PMAX_BUS_DMA_PRIVATE */ 668 669 #endif /* !_PMAX_BUS_H_ */ 670