1 /* $NetBSD: bus.h,v 1.16 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 _NEWSMIPS_BUS_H_ 41 #define _NEWSMIPS_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(uint,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(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(bus_space_tag_t, bus_addr_t, bus_size_t, 75 int, bus_space_handle_t *); 76 77 /* 78 * void bus_space_unmap(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 (bus_space_tag_t, bus_space_handle_t, bus_size_t); 85 86 /* 87 * int bus_space_subregion(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(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(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 (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 (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(bus_space_tag_t t, bus_space_handle_t bsh, 119 bus_size_t size); 120 121 /* 122 * uintN_t bus_space_read_N(bus_space_tag_t tag, 123 * bus_space_handle_t bsh, bus_size_t offset); 124 * 125 * Read a 1, 2, 4, or 8 byte quantity from bus space 126 * described by tag/handle/offset. 127 */ 128 129 #define bus_space_read_1(t, h, o) \ 130 ((void) t, (*(volatile uint8_t *)((h) + (o)))) 131 132 #define bus_space_read_2(t, h, o) \ 133 ((void) t, (*(volatile uint16_t *)((h) + (o)))) 134 135 #define bus_space_read_4(t, h, o) \ 136 ((void) t, (*(volatile uint32_t *)((h) + (o)))) 137 138 #if 0 /* Cause a link error for bus_space_read_8 */ 139 #define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!! 140 #endif 141 142 /* 143 * void bus_space_read_multi_N(bus_space_tag_t tag, 144 * bus_space_handle_t bsh, bus_size_t offset, 145 * uintN_t *addr, size_t count); 146 * 147 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 148 * described by tag/handle/offset and copy into buffer provided. 149 */ 150 151 #define __NEWSMIPS_bus_space_read_multi(BYTES,BITS) \ 152 static __inline void __CONCAT(bus_space_read_multi_,BYTES) \ 153 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 154 __PB_TYPENAME(BITS) *, size_t); \ 155 \ 156 static __inline void \ 157 __CONCAT(bus_space_read_multi_,BYTES)(t, h, o, a, c) \ 158 bus_space_tag_t t; \ 159 bus_space_handle_t h; \ 160 bus_size_t o; \ 161 __PB_TYPENAME(BITS) *a; \ 162 size_t c; \ 163 { \ 164 \ 165 while (c--) \ 166 *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \ 167 } 168 169 __NEWSMIPS_bus_space_read_multi(1,8) 170 __NEWSMIPS_bus_space_read_multi(2,16) 171 __NEWSMIPS_bus_space_read_multi(4,32) 172 173 #if 0 /* Cause a link error for bus_space_read_multi_8 */ 174 #define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!! 175 #endif 176 177 #undef __NEWSMIPS_bus_space_read_multi 178 179 /* 180 * void bus_space_read_region_N(bus_space_tag_t tag, 181 * bus_space_handle_t bsh, bus_size_t offset, 182 * uintN_t *addr, size_t count); 183 * 184 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 185 * described by tag/handle and starting at `offset' and copy into 186 * buffer provided. 187 */ 188 189 #define __NEWSMIPS_bus_space_read_region(BYTES,BITS) \ 190 static __inline void __CONCAT(bus_space_read_region_,BYTES) \ 191 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 192 __PB_TYPENAME(BITS) *, size_t); \ 193 \ 194 static __inline void \ 195 __CONCAT(bus_space_read_region_,BYTES)(t, h, o, a, c) \ 196 bus_space_tag_t t; \ 197 bus_space_handle_t h; \ 198 bus_size_t o; \ 199 __PB_TYPENAME(BITS) *a; \ 200 size_t c; \ 201 { \ 202 \ 203 while (c--) { \ 204 *a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \ 205 o += BYTES; \ 206 } \ 207 } 208 209 __NEWSMIPS_bus_space_read_region(1,8) 210 __NEWSMIPS_bus_space_read_region(2,16) 211 __NEWSMIPS_bus_space_read_region(4,32) 212 213 #if 0 /* Cause a link error for bus_space_read_region_8 */ 214 #define bus_space_read_region_8 !!! bus_space_read_region_8 unimplemented !!! 215 #endif 216 217 #undef __NEWSMIPS_bus_space_read_region 218 219 /* 220 * void bus_space_write_N(bus_space_tag_t tag, 221 * bus_space_handle_t bsh, bus_size_t offset, 222 * uintN_t value); 223 * 224 * Write the 1, 2, 4, or 8 byte value `value' to bus space 225 * described by tag/handle/offset. 226 */ 227 228 #define bus_space_write_1(t, h, o, v) \ 229 do { \ 230 (void) t; \ 231 *(volatile uint8_t *)((h) + (o)) = (v); \ 232 } while (0) 233 234 #define bus_space_write_2(t, h, o, v) \ 235 do { \ 236 (void) t; \ 237 *(volatile uint16_t *)((h) + (o)) = (v); \ 238 } while (0) 239 240 #define bus_space_write_4(t, h, o, v) \ 241 do { \ 242 (void) t; \ 243 *(volatile uint32_t *)((h) + (o)) = (v); \ 244 } while (0) 245 246 #if 0 /* Cause a link error for bus_space_write_8 */ 247 #define bus_space_write_8 !!! bus_space_write_8 not implemented !!! 248 #endif 249 250 /* 251 * void bus_space_write_multi_N(bus_space_tag_t tag, 252 * bus_space_handle_t bsh, bus_size_t offset, 253 * const uintN_t *addr, size_t count); 254 * 255 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer 256 * provided to bus space described by tag/handle/offset. 257 */ 258 259 #define __NEWSMIPS_bus_space_write_multi(BYTES,BITS) \ 260 static __inline void __CONCAT(bus_space_write_multi_,BYTES) \ 261 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 262 const __PB_TYPENAME(BITS) *, size_t); \ 263 \ 264 static __inline void \ 265 __CONCAT(bus_space_write_multi_,BYTES)(t, h, o, a, c) \ 266 bus_space_tag_t t; \ 267 bus_space_handle_t h; \ 268 bus_size_t o; \ 269 const __PB_TYPENAME(BITS) *a; \ 270 size_t c; \ 271 { \ 272 \ 273 while (c--) \ 274 __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \ 275 } 276 277 __NEWSMIPS_bus_space_write_multi(1,8) 278 __NEWSMIPS_bus_space_write_multi(2,16) 279 __NEWSMIPS_bus_space_write_multi(4,32) 280 281 #if 0 /* Cause a link error for bus_space_write_8 */ 282 #define bus_space_write_multi_8(t, h, o, a, c) \ 283 !!! bus_space_write_multi_8 unimplimented !!! 284 #endif 285 286 #undef __NEWSMIPS_bus_space_write_multi 287 288 /* 289 * void bus_space_write_region_N(bus_space_tag_t tag, 290 * bus_space_handle_t bsh, bus_size_t offset, 291 * const uintN_t *addr, size_t count); 292 * 293 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided 294 * to bus space described by tag/handle starting at `offset'. 295 */ 296 297 #define __NEWSMIPS_bus_space_write_region(BYTES,BITS) \ 298 static __inline void __CONCAT(bus_space_write_region_,BYTES) \ 299 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 300 const __PB_TYPENAME(BITS) *, size_t); \ 301 \ 302 static __inline void \ 303 __CONCAT(bus_space_write_region_,BYTES)(t, h, o, a, c) \ 304 bus_space_tag_t t; \ 305 bus_space_handle_t h; \ 306 bus_size_t o; \ 307 const __PB_TYPENAME(BITS) *a; \ 308 size_t c; \ 309 { \ 310 \ 311 while (c--) { \ 312 __CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \ 313 o += BYTES; \ 314 } \ 315 } 316 317 __NEWSMIPS_bus_space_write_region(1,8) 318 __NEWSMIPS_bus_space_write_region(2,16) 319 __NEWSMIPS_bus_space_write_region(4,32) 320 321 #if 0 /* Cause a link error for bus_space_write_region_8 */ 322 #define bus_space_write_region_8 \ 323 !!! bus_space_write_region_8 unimplemented !!! 324 #endif 325 326 #undef __NEWSMIPS_bus_space_write_region 327 328 /* 329 * void bus_space_set_multi_N(bus_space_tag_t tag, 330 * bus_space_handle_t bsh, bus_size_t offset, uintN_t val, 331 * size_t count); 332 * 333 * Write the 1, 2, 4, or 8 byte value `val' to bus space described 334 * by tag/handle/offset `count' times. 335 */ 336 337 #define __NEWSMIPS_bus_space_set_multi(BYTES,BITS) \ 338 static __inline void __CONCAT(bus_space_set_multi_,BYTES) \ 339 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 340 __PB_TYPENAME(BITS), size_t); \ 341 \ 342 static __inline void \ 343 __CONCAT(bus_space_set_multi_,BYTES)(t, h, o, v, c) \ 344 bus_space_tag_t t; \ 345 bus_space_handle_t h; \ 346 bus_size_t o; \ 347 __PB_TYPENAME(BITS) v; \ 348 size_t c; \ 349 { \ 350 \ 351 while (c--) \ 352 __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \ 353 } 354 355 __NEWSMIPS_bus_space_set_multi(1,8) 356 __NEWSMIPS_bus_space_set_multi(2,16) 357 __NEWSMIPS_bus_space_set_multi(4,32) 358 359 #if 0 /* Cause a link error for bus_space_set_multi_8 */ 360 #define bus_space_set_multi_8 \ 361 !!! bus_space_set_multi_8 unimplemented !!! 362 #endif 363 364 #undef __NEWSMIPS_bus_space_set_multi 365 366 /* 367 * void bus_space_set_region_N(bus_space_tag_t tag, 368 * bus_space_handle_t bsh, bus_size_t offset, uintN_t val, 369 * size_t count); 370 * 371 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described 372 * by tag/handle starting at `offset'. 373 */ 374 375 #define __NEWSMIPS_bus_space_set_region(BYTES,BITS) \ 376 static __inline void __CONCAT(bus_space_set_region_,BYTES) \ 377 (bus_space_tag_t, bus_space_handle_t, bus_size_t, \ 378 __PB_TYPENAME(BITS), size_t); \ 379 \ 380 static __inline void \ 381 __CONCAT(bus_space_set_region_,BYTES)(t, h, o, v, c) \ 382 bus_space_tag_t t; \ 383 bus_space_handle_t h; \ 384 bus_size_t o; \ 385 __PB_TYPENAME(BITS) v; \ 386 size_t c; \ 387 { \ 388 \ 389 while (c--) { \ 390 __CONCAT(bus_space_write_,BYTES)(t, h, o, v); \ 391 o += BYTES; \ 392 } \ 393 } 394 395 __NEWSMIPS_bus_space_set_region(1,8) 396 __NEWSMIPS_bus_space_set_region(2,16) 397 __NEWSMIPS_bus_space_set_region(4,32) 398 399 #if 0 /* Cause a link error for bus_space_set_region_8 */ 400 #define bus_space_set_region_8 \ 401 !!! bus_space_set_region_8 unimplemented !!! 402 #endif 403 404 #undef __NEWSMIPS_bus_space_set_region 405 406 /* 407 * void bus_space_copy_region_N(bus_space_tag_t tag, 408 * bus_space_handle_t bsh1, bus_size_t off1, 409 * bus_space_handle_t bsh2, bus_size_t off2, 410 * bus_size_t count); 411 * 412 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting 413 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. 414 */ 415 416 #define __NEWSMIPS_copy_region(BYTES) \ 417 static __inline void __CONCAT(bus_space_copy_region_,BYTES) \ 418 (bus_space_tag_t, \ 419 bus_space_handle_t bsh1, bus_size_t off1, \ 420 bus_space_handle_t bsh2, bus_size_t off2, \ 421 bus_size_t count); \ 422 \ 423 static __inline void \ 424 __CONCAT(bus_space_copy_region_,BYTES)(t, h1, o1, h2, o2, c) \ 425 bus_space_tag_t t; \ 426 bus_space_handle_t h1, h2; \ 427 bus_size_t o1, o2, c; \ 428 { \ 429 bus_size_t o; \ 430 \ 431 if ((h1 + o1) >= (h2 + o2)) { \ 432 /* src after dest: copy forward */ \ 433 for (o = 0; c != 0; c--, o += BYTES) \ 434 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ 435 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ 436 } else { \ 437 /* dest after src: copy backwards */ \ 438 for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \ 439 __CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \ 440 __CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \ 441 } \ 442 } 443 444 __NEWSMIPS_copy_region(1) 445 __NEWSMIPS_copy_region(2) 446 __NEWSMIPS_copy_region(4) 447 448 #if 0 /* Cause a link error for bus_space_copy_region_8 */ 449 #define bus_space_copy_region_8 \ 450 !!! bus_space_copy_region_8 unimplemented !!! 451 #endif 452 453 #undef __NEWSMIPS_copy_region 454 455 /* 456 * Bus read/write barrier methods. 457 * 458 * void bus_space_barrier(bus_space_tag_t tag, 459 * bus_space_handle_t bsh, bus_size_t offset, 460 * bus_size_t len, int flags); 461 * 462 * On the MIPS, we just flush the write buffer. 463 */ 464 #define bus_space_barrier(t, h, o, l, f) \ 465 ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f), \ 466 wbflush())) 467 #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */ 468 #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */ 469 470 #undef __PB_TYPENAME_PREFIX 471 #undef __PB_TYPENAME 472 473 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) 474 475 /* 476 * Flags used in various bus DMA methods. 477 */ 478 #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */ 479 #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */ 480 #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */ 481 #define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */ 482 #define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */ 483 #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */ 484 #define BUS_DMA_BUS2 0x020 485 #define BUS_DMA_BUS3 0x040 486 #define BUS_DMA_BUS4 0x080 487 #define BUS_DMA_READ 0x100 /* mapping is device -> memory only */ 488 #define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */ 489 #define BUS_DMA_NOCACHE 0x400 /* hint: map non-cached memory */ 490 491 #define NEWSMIPS_DMAMAP_COHERENT 0x10000 /* no cache flush necessary on sync */ 492 #define NEWSMIPS_DMAMAP_MAPTBL 0x20000 /* use DMA maping table */ 493 494 /* Forwards needed by prototypes below. */ 495 struct mbuf; 496 struct uio; 497 498 /* 499 * Operations performed by bus_dmamap_sync(). 500 */ 501 #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ 502 #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ 503 #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ 504 #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ 505 506 typedef struct newsmips_bus_dma_tag *bus_dma_tag_t; 507 typedef struct newsmips_bus_dmamap *bus_dmamap_t; 508 509 #define BUS_DMA_TAG_VALID(t) ((t) != (bus_dma_tag_t)0) 510 511 /* 512 * bus_dma_segment_t 513 * 514 * Describes a single contiguous DMA transaction. Values 515 * are suitable for programming into DMA registers. 516 */ 517 struct newsmips_bus_dma_segment { 518 bus_addr_t ds_addr; /* DMA address */ 519 bus_size_t ds_len; /* length of transfer */ 520 bus_addr_t _ds_vaddr; /* virtual address, 0 if invalid */ 521 }; 522 typedef struct newsmips_bus_dma_segment bus_dma_segment_t; 523 524 /* 525 * bus_dma_tag_t 526 * 527 * A machine-dependent opaque type describing the implementation of 528 * DMA for a given bus. 529 */ 530 531 struct newsmips_bus_dma_tag { 532 /* 533 * DMA mapping methods. 534 */ 535 int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int, 536 bus_size_t, bus_size_t, int, bus_dmamap_t *); 537 void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t); 538 int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *, 539 bus_size_t, struct proc *, int); 540 int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t, 541 struct mbuf *, int); 542 int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t, 543 struct uio *, int); 544 int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t, 545 bus_dma_segment_t *, int, bus_size_t, int); 546 void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t); 547 void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t, 548 bus_addr_t, bus_size_t, int); 549 550 /* 551 * DMA memory utility functions. 552 */ 553 int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t, 554 bus_size_t, bus_dma_segment_t *, int, int *, int); 555 void (*_dmamem_free)(bus_dma_tag_t, 556 bus_dma_segment_t *, int); 557 int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *, 558 int, size_t, caddr_t *, int); 559 void (*_dmamem_unmap)(bus_dma_tag_t, caddr_t, size_t); 560 paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *, 561 int, off_t, int, int); 562 563 /* 564 * NEWSMIPS quirks. 565 * This is NOT a constant. Slot dependent information is 566 * required to flush DMA cache correctly. 567 */ 568 int _slotno; 569 bus_space_tag_t _slotbaset; 570 bus_space_handle_t _slotbaseh; 571 }; 572 573 #define bus_dmamap_create(t, s, n, m, b, f, p) \ 574 (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) 575 #define bus_dmamap_destroy(t, p) \ 576 (*(t)->_dmamap_destroy)((t), (p)) 577 #define bus_dmamap_load(t, m, b, s, p, f) \ 578 (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) 579 #define bus_dmamap_load_mbuf(t, m, b, f) \ 580 (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) 581 #define bus_dmamap_load_uio(t, m, u, f) \ 582 (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) 583 #define bus_dmamap_load_raw(t, m, sg, n, s, f) \ 584 (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) 585 #define bus_dmamap_unload(t, p) \ 586 (*(t)->_dmamap_unload)((t), (p)) 587 #define bus_dmamap_sync(t, p, o, l, ops) \ 588 (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops)) 589 590 #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ 591 (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) 592 #define bus_dmamem_free(t, sg, n) \ 593 (*(t)->_dmamem_free)((t), (sg), (n)) 594 #define bus_dmamem_map(t, sg, n, s, k, f) \ 595 (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) 596 #define bus_dmamem_unmap(t, k, s) \ 597 (*(t)->_dmamem_unmap)((t), (k), (s)) 598 #define bus_dmamem_mmap(t, sg, n, o, p, f) \ 599 (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) 600 601 /* 602 * bus_dmamap_t 603 * 604 * Describes a DMA mapping. 605 */ 606 struct newsmips_bus_dmamap { 607 /* 608 * PRIVATE MEMBERS: not for use my machine-independent code. 609 */ 610 bus_size_t _dm_size; /* largest DMA transfer mappable */ 611 int _dm_segcnt; /* number of segs this map can map */ 612 bus_size_t _dm_maxmaxsegsz; /* fixed largest possible segment */ 613 bus_size_t _dm_boundary; /* don't cross this */ 614 int _dm_flags; /* misc. flags */ 615 int _dm_maptbl; /* DMA mapping table index */ 616 int _dm_maptblcnt; /* number of DMA mapping table */ 617 struct vmspace *_dm_vmspace; /* vmspace that owns the mapping */ 618 619 /* 620 * PUBLIC MEMBERS: these are used by machine-independent code. 621 */ 622 bus_size_t dm_maxsegsz; /* largest possible segment */ 623 bus_size_t dm_mapsize; /* size of the mapping */ 624 int dm_nsegs; /* # valid segments in mapping */ 625 bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 626 }; 627 628 #ifdef _NEWSMIPS_BUS_DMA_PRIVATE 629 void newsmips_bus_dma_init(void); 630 631 int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t, 632 bus_size_t, int, bus_dmamap_t *); 633 void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); 634 int _bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, 635 bus_size_t, struct proc *, int); 636 int _bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, 637 struct mbuf *, int); 638 int _bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, 639 struct uio *, int); 640 int _bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, 641 bus_dma_segment_t *, int, bus_size_t, int); 642 void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); 643 void _bus_dmamap_sync_r3k(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 644 bus_size_t, int); 645 void _bus_dmamap_sync_r4k(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 646 bus_size_t, int); 647 648 int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size, 649 bus_size_t alignment, bus_size_t boundary, 650 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags); 651 void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs, 652 int nsegs); 653 int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs, 654 int nsegs, size_t size, caddr_t *kvap, int flags); 655 void _bus_dmamem_unmap(bus_dma_tag_t tag, caddr_t kva, 656 size_t size); 657 paddr_t _bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs, 658 int nsegs, off_t off, int prot, int flags); 659 660 int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size, 661 bus_size_t alignment, bus_size_t boundary, 662 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, 663 vaddr_t low, vaddr_t high); 664 665 extern struct newsmips_bus_dma_tag newsmips_default_bus_dma_tag; 666 #endif /* _NEWSMIPS_BUS_DMA_PRIVATE */ 667 668 #endif /* _NEWSMIPS_BUS_H_ */ 669