1 /* $OpenBSD: bus.h,v 1.11 2024/11/18 05:32:39 jsg Exp $ */ 2 /* 3 * Copyright (c) 2003-2004 Opsycon AB Sweden. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef _MACHINE_BUS_H_ 27 #define _MACHINE_BUS_H_ 28 29 #ifdef __STDC__ 30 #define CAT(a,b) a##b 31 #define CAT3(a,b,c) a##b##c 32 #else 33 #define CAT(a,b) a/**/b 34 #define CAT3(a,b,c) a/**/b/**/c 35 #endif 36 37 /* 38 * Bus access types. 39 */ 40 struct bus_space; 41 typedef u_long bus_addr_t; 42 typedef u_long bus_size_t; 43 typedef u_long bus_space_handle_t; 44 typedef struct bus_space *bus_space_tag_t; 45 typedef struct bus_space bus_space_t; 46 47 struct bus_space { 48 bus_addr_t bus_base; 49 void *bus_private; 50 u_int8_t (*_space_read_1)(bus_space_tag_t , bus_space_handle_t, 51 bus_size_t); 52 void (*_space_write_1)(bus_space_tag_t , bus_space_handle_t, 53 bus_size_t, u_int8_t); 54 u_int16_t (*_space_read_2)(bus_space_tag_t , bus_space_handle_t, 55 bus_size_t); 56 void (*_space_write_2)(bus_space_tag_t , bus_space_handle_t, 57 bus_size_t, u_int16_t); 58 u_int32_t (*_space_read_4)(bus_space_tag_t , bus_space_handle_t, 59 bus_size_t); 60 void (*_space_write_4)(bus_space_tag_t , bus_space_handle_t, 61 bus_size_t, u_int32_t); 62 u_int64_t (*_space_read_8)(bus_space_tag_t , bus_space_handle_t, 63 bus_size_t); 64 void (*_space_write_8)(bus_space_tag_t , bus_space_handle_t, 65 bus_size_t, u_int64_t); 66 void (*_space_read_raw_2)(bus_space_tag_t, bus_space_handle_t, 67 bus_addr_t, u_int8_t *, bus_size_t); 68 void (*_space_write_raw_2)(bus_space_tag_t, bus_space_handle_t, 69 bus_addr_t, const u_int8_t *, bus_size_t); 70 void (*_space_read_raw_4)(bus_space_tag_t, bus_space_handle_t, 71 bus_addr_t, u_int8_t *, bus_size_t); 72 void (*_space_write_raw_4)(bus_space_tag_t, bus_space_handle_t, 73 bus_addr_t, const u_int8_t *, bus_size_t); 74 void (*_space_read_raw_8)(bus_space_tag_t, bus_space_handle_t, 75 bus_addr_t, u_int8_t *, bus_size_t); 76 void (*_space_write_raw_8)(bus_space_tag_t, bus_space_handle_t, 77 bus_addr_t, const u_int8_t *, bus_size_t); 78 int (*_space_map)(bus_space_tag_t , bus_addr_t, 79 bus_size_t, int, bus_space_handle_t *); 80 void (*_space_unmap)(bus_space_tag_t, bus_space_handle_t, 81 bus_size_t); 82 int (*_space_subregion)(bus_space_tag_t, bus_space_handle_t, 83 bus_size_t, bus_size_t, bus_space_handle_t *); 84 void * (*_space_vaddr)(bus_space_tag_t, bus_space_handle_t); 85 paddr_t (*_space_mmap)(bus_space_tag_t, bus_addr_t, off_t, 86 int, int); 87 }; 88 89 #define bus_space_read_1(t, h, o) (*(t)->_space_read_1)((t), (h), (o)) 90 #define bus_space_read_2(t, h, o) (*(t)->_space_read_2)((t), (h), (o)) 91 #define bus_space_read_4(t, h, o) (*(t)->_space_read_4)((t), (h), (o)) 92 #define bus_space_read_8(t, h, o) (*(t)->_space_read_8)((t), (h), (o)) 93 94 #define bus_space_write_1(t, h, o, v) (*(t)->_space_write_1)((t), (h), (o), (v)) 95 #define bus_space_write_2(t, h, o, v) (*(t)->_space_write_2)((t), (h), (o), (v)) 96 #define bus_space_write_4(t, h, o, v) (*(t)->_space_write_4)((t), (h), (o), (v)) 97 #define bus_space_write_8(t, h, o, v) (*(t)->_space_write_8)((t), (h), (o), (v)) 98 99 #define bus_space_read_raw_2(t, h, o) \ 100 (*(t)->_space_read_2)((t), (h), (o)) 101 #define bus_space_read_raw_4(t, h, o) \ 102 (*(t)->_space_read_4)((t), (h), (o)) 103 #define bus_space_read_raw_8(t, h, o) \ 104 (*(t)->_space_read_8)((t), (h), (o)) 105 106 #define bus_space_write_raw_2(t, h, o, v) \ 107 (*(t)->_space_write_2)((t), (h), (o), (v)) 108 #define bus_space_write_raw_4(t, h, o, v) \ 109 (*(t)->_space_write_4)((t), (h), (o), (v)) 110 #define bus_space_write_raw_8(t, h, o, v) \ 111 (*(t)->_space_write_8)((t), (h), (o), (v)) 112 113 #define bus_space_read_raw_multi_2(t, h, a, b, l) \ 114 (*(t)->_space_read_raw_2)((t), (h), (a), (b), (l)) 115 #define bus_space_read_raw_multi_4(t, h, a, b, l) \ 116 (*(t)->_space_read_raw_4)((t), (h), (a), (b), (l)) 117 #define bus_space_read_raw_multi_8(t, h, a, b, l) \ 118 (*(t)->_space_read_raw_8)((t), (h), (a), (b), (l)) 119 120 #define bus_space_write_raw_multi_2(t, h, a, b, l) \ 121 (*(t)->_space_write_raw_2)((t), (h), (a), (b), (l)) 122 #define bus_space_write_raw_multi_4(t, h, a, b, l) \ 123 (*(t)->_space_write_raw_4)((t), (h), (a), (b), (l)) 124 #define bus_space_write_raw_multi_8(t, h, a, b, l) \ 125 (*(t)->_space_write_raw_8)((t), (h), (a), (b), (l)) 126 127 #define bus_space_map(t, o, s, c, p) (*(t)->_space_map)((t), (o), (s), (c), (p)) 128 #define bus_space_unmap(t, h, s) (*(t)->_space_unmap)((t), (h), (s)) 129 #define bus_space_subregion(t, h, o, s, p) \ 130 (*(t)->_space_subregion)((t), (h), (o), (s), (p)) 131 132 #define BUS_SPACE_MAP_CACHEABLE 0x01 133 #define BUS_SPACE_MAP_POSTED 0x02 134 #define BUS_SPACE_MAP_LINEAR 0x04 135 #define BUS_SPACE_MAP_PREFETCHABLE 0x08 136 137 extern bus_space_t arm64_bs_tag; 138 139 #define bus_space_vaddr(t, h) (*(t)->_space_vaddr)((t), (h)) 140 #define bus_space_mmap(t, a, o, p, f) \ 141 (*(t)->_space_mmap)((t), (a), (o), (p), (f)) 142 143 /*----------------------------------------------------------------------------*/ 144 #define bus_space_read_multi(n,m) \ 145 static __inline void \ 146 CAT(bus_space_read_multi_,n)(bus_space_tag_t bst, bus_space_handle_t bsh, \ 147 bus_size_t o, CAT3(u_int,m,_t) *x, size_t cnt) \ 148 { \ 149 while (cnt--) \ 150 *x++ = CAT(bus_space_read_,n)(bst, bsh, o); \ 151 } 152 153 bus_space_read_multi(1,8) 154 bus_space_read_multi(2,16) 155 bus_space_read_multi(4,32) 156 bus_space_read_multi(8,64) 157 158 /*----------------------------------------------------------------------------*/ 159 #define bus_space_read_region(n,m) \ 160 static __inline void \ 161 CAT(bus_space_read_region_,n)(bus_space_tag_t bst, bus_space_handle_t bsh, \ 162 bus_addr_t ba, CAT3(u_int,m,_t) *x, size_t cnt) \ 163 { \ 164 while (cnt--) { \ 165 *x++ = CAT(bus_space_read_,n)(bst, bsh, ba); \ 166 ba += (n); \ 167 } \ 168 } 169 170 bus_space_read_region(1,8) 171 bus_space_read_region(2,16) 172 bus_space_read_region(4,32) 173 bus_space_read_region(8,64) 174 175 /*----------------------------------------------------------------------------*/ 176 #define bus_space_read_raw_region(n,m) \ 177 static __inline void \ 178 CAT(bus_space_read_raw_region_,n)(bus_space_tag_t bst, \ 179 bus_space_handle_t bsh, \ 180 bus_addr_t ba, u_int8_t *x, size_t cnt) \ 181 { \ 182 cnt >>= ((n) >> 1); \ 183 while (cnt--) { \ 184 CAT(bus_space_read_raw_multi_,n)(bst, bsh, ba, x, (n)); \ 185 ba += (n); \ 186 x += (n); \ 187 } \ 188 } 189 190 bus_space_read_raw_region(2,16) 191 bus_space_read_raw_region(4,32) 192 bus_space_read_raw_region(8,64) 193 194 /*----------------------------------------------------------------------------*/ 195 #define bus_space_write_multi(n,m) \ 196 static __inline void \ 197 CAT(bus_space_write_multi_,n)(bus_space_tag_t bst, bus_space_handle_t bsh, \ 198 bus_size_t o, const CAT3(u_int,m,_t) *x, size_t cnt) \ 199 { \ 200 while (cnt--) \ 201 CAT(bus_space_write_,n)(bst, bsh, o, *x++); \ 202 } 203 204 bus_space_write_multi(1,8) 205 bus_space_write_multi(2,16) 206 bus_space_write_multi(4,32) 207 bus_space_write_multi(8,64) 208 209 /*----------------------------------------------------------------------------*/ 210 #define bus_space_write_region(n,m) \ 211 static __inline void \ 212 CAT(bus_space_write_region_,n)(bus_space_tag_t bst, bus_space_handle_t bsh, \ 213 bus_addr_t ba, const CAT3(u_int,m,_t) *x, size_t cnt) \ 214 { \ 215 while (cnt--) { \ 216 CAT(bus_space_write_,n)(bst, bsh, ba, *x++); \ 217 ba += (n); \ 218 } \ 219 } 220 221 bus_space_write_region(1,8) 222 bus_space_write_region(2,16) 223 bus_space_write_region(4,32) 224 bus_space_write_region(8,64) 225 226 /*----------------------------------------------------------------------------*/ 227 #define bus_space_write_raw_region(n,m) \ 228 static __inline void \ 229 CAT(bus_space_write_raw_region_,n)(bus_space_tag_t bst, \ 230 bus_space_handle_t bsh, \ 231 bus_addr_t ba, const u_int8_t *x, size_t cnt) \ 232 { \ 233 cnt >>= ((n) >> 1); \ 234 while (cnt--) { \ 235 CAT(bus_space_write_raw_multi_,n)(bst, bsh, ba, x, (n)); \ 236 ba += (n); \ 237 x += (n); \ 238 } \ 239 } 240 241 bus_space_write_raw_region(2,16) 242 bus_space_write_raw_region(4,32) 243 bus_space_write_raw_region(8,64) 244 245 /*----------------------------------------------------------------------------*/ 246 #define bus_space_set_region(n,m) \ 247 static __inline void \ 248 CAT(bus_space_set_region_,n)(bus_space_tag_t bst, bus_space_handle_t bsh, \ 249 bus_addr_t ba, CAT3(u_int,m,_t) x, size_t cnt) \ 250 { \ 251 while (cnt--) { \ 252 CAT(bus_space_write_,n)(bst, bsh, ba, x); \ 253 ba += (n); \ 254 } \ 255 } 256 257 bus_space_set_region(1,8) 258 bus_space_set_region(2,16) 259 bus_space_set_region(4,32) 260 bus_space_set_region(8,64) 261 262 /*----------------------------------------------------------------------------*/ 263 static __inline void 264 bus_space_copy_1(void *v, bus_space_handle_t h1, bus_size_t o1, 265 bus_space_handle_t h2, bus_size_t o2, bus_size_t c) 266 { 267 char *s = (char *)(h1 + o1); 268 char *d = (char *)(h2 + o2); 269 270 while (c--) 271 *d++ = *s++; 272 } 273 274 275 static __inline void 276 bus_space_copy_2(void *v, bus_space_handle_t h1, bus_size_t o1, 277 bus_space_handle_t h2, bus_size_t o2, bus_size_t c) 278 { 279 short *s = (short *)(h1 + o1); 280 short *d = (short *)(h2 + o2); 281 282 while (c--) 283 *d++ = *s++; 284 } 285 286 static __inline void 287 bus_space_copy_4(void *v, bus_space_handle_t h1, bus_size_t o1, 288 bus_space_handle_t h2, bus_size_t o2, bus_size_t c) 289 { 290 int *s = (int *)(h1 + o1); 291 int *d = (int *)(h2 + o2); 292 293 while (c--) 294 *d++ = *s++; 295 } 296 297 static __inline void 298 bus_space_copy_8(void *v, bus_space_handle_t h1, bus_size_t o1, 299 bus_space_handle_t h2, bus_size_t o2, bus_size_t c) 300 { 301 int64_t *s = (int64_t *)(h1 + o1); 302 int64_t *d = (int64_t *)(h2 + o2); 303 304 while (c--) 305 *d++ = *s++; 306 } 307 308 /*----------------------------------------------------------------------------*/ 309 /* 310 * Bus read/write barrier methods. 311 * 312 * void bus_space_barrier(bus_space_tag_t tag, 313 * bus_space_handle_t bsh, bus_size_t offset, 314 * bus_size_t len, int flags); 315 * 316 */ 317 static inline void 318 bus_space_barrier(bus_space_tag_t t, bus_space_handle_t h, bus_size_t offset, 319 bus_size_t length, int flags) 320 { 321 __asm__ volatile ("dsb sy" ::: "memory"); 322 } 323 #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */ 324 #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */ 325 326 #define BUS_DMA_WAITOK 0x0000 327 #define BUS_DMA_NOWAIT 0x0001 328 #define BUS_DMA_ALLOCNOW 0x0002 329 #define BUS_DMA_COHERENT 0x0008 330 #define BUS_DMA_BUS1 0x0010 /* placeholders for bus functions... */ 331 #define BUS_DMA_BUS2 0x0020 332 #define BUS_DMA_BUS3 0x0040 333 #define BUS_DMA_BUS4 0x0080 334 #define BUS_DMA_READ 0x0100 /* mapping is device -> memory only */ 335 #define BUS_DMA_WRITE 0x0200 /* mapping is memory -> device only */ 336 #define BUS_DMA_STREAMING 0x0400 /* hint: sequential, unidirectional */ 337 #define BUS_DMA_ZERO 0x0800 /* zero memory in dmamem_alloc */ 338 #define BUS_DMA_NOCACHE 0x1000 339 #define BUS_DMA_64BIT 0x2000 /* device handles 64bit dva */ 340 #define BUS_DMA_FIXED 0x4000 /* place mapping at specified dva */ 341 342 /* Forwards needed by prototypes below. */ 343 struct mbuf; 344 struct proc; 345 struct uio; 346 347 #define BUS_DMASYNC_POSTREAD 0x0001 348 #define BUS_DMASYNC_POSTWRITE 0x0002 349 #define BUS_DMASYNC_PREREAD 0x0004 350 #define BUS_DMASYNC_PREWRITE 0x0008 351 352 typedef struct machine_bus_dma_tag *bus_dma_tag_t; 353 typedef struct machine_bus_dmamap *bus_dmamap_t; 354 355 /* 356 * bus_dma_segment_t 357 * 358 * Describes a single contiguous DMA transaction. Values 359 * are suitable for programming into DMA registers. 360 */ 361 struct machine_bus_dma_segment { 362 bus_addr_t ds_addr; /* DMA address */ 363 bus_size_t ds_len; /* length of transfer */ 364 365 paddr_t _ds_paddr; /* CPU address */ 366 vaddr_t _ds_vaddr; /* CPU address */ 367 }; 368 typedef struct machine_bus_dma_segment bus_dma_segment_t; 369 370 /* 371 * bus_dma_tag_t 372 * 373 * A machine-dependent opaque type describing the implementation of 374 * DMA for a given bus. 375 */ 376 377 struct machine_bus_dma_tag { 378 void *_cookie; /* cookie used in the guts */ 379 int _flags; /* misc. flags */ 380 381 /* 382 * DMA mapping methods. 383 */ 384 int (*_dmamap_create)(bus_dma_tag_t , bus_size_t, int, 385 bus_size_t, bus_size_t, int, bus_dmamap_t *); 386 void (*_dmamap_destroy)(bus_dma_tag_t , bus_dmamap_t); 387 int (*_dmamap_load)(bus_dma_tag_t , bus_dmamap_t, void *, 388 bus_size_t, struct proc *, int); 389 int (*_dmamap_load_mbuf)(bus_dma_tag_t , bus_dmamap_t, 390 struct mbuf *, int); 391 int (*_dmamap_load_uio)(bus_dma_tag_t , bus_dmamap_t, 392 struct uio *, int); 393 int (*_dmamap_load_raw)(bus_dma_tag_t , bus_dmamap_t, 394 bus_dma_segment_t *, int, bus_size_t, int); 395 int (*_dmamap_load_buffer)(bus_dma_tag_t, bus_dmamap_t, void *, 396 bus_size_t, struct proc *, int, paddr_t *, int *, int); 397 void (*_dmamap_unload)(bus_dma_tag_t , bus_dmamap_t); 398 void (*_dmamap_sync)(bus_dma_tag_t , bus_dmamap_t, 399 bus_addr_t, bus_size_t, int); 400 401 /* 402 * DMA memory utility functions. 403 */ 404 int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t, 405 bus_size_t, bus_dma_segment_t *, int, int *, int); 406 int (*_dmamem_alloc_range)(bus_dma_tag_t, bus_size_t, bus_size_t, 407 bus_size_t, bus_dma_segment_t *, int, int *, int, 408 bus_addr_t, bus_addr_t); 409 void (*_dmamem_free)(bus_dma_tag_t, bus_dma_segment_t *, int); 410 int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *, 411 int, size_t, caddr_t *, int); 412 void (*_dmamem_unmap)(bus_dma_tag_t, caddr_t, size_t); 413 paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *, 414 int, off_t, int, int); 415 416 /* 417 * internal memory address translation information. 418 */ 419 bus_addr_t _dma_mask; 420 }; 421 422 #define bus_dmamap_create(t, s, n, m, b, f, p) \ 423 (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) 424 #define bus_dmamap_destroy(t, p) \ 425 (*(t)->_dmamap_destroy)((t), (p)) 426 #define bus_dmamap_load(t, m, b, s, p, f) \ 427 (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) 428 #define bus_dmamap_load_mbuf(t, m, b, f) \ 429 (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) 430 #define bus_dmamap_load_uio(t, m, u, f) \ 431 (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) 432 #define bus_dmamap_load_raw(t, m, sg, n, s, f) \ 433 (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) 434 #define bus_dmamap_unload(t, p) \ 435 (*(t)->_dmamap_unload)((t), (p)) 436 #define bus_dmamap_sync(t, p, a, l, o) \ 437 (void)((t)->_dmamap_sync ? \ 438 (*(t)->_dmamap_sync)((t), (p), (a), (l), (o)) : (void)0) 439 440 #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ 441 (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) 442 #define bus_dmamem_alloc_range(t, s, a, b, sg, n, r, f, l, h) \ 443 (*(t)->_dmamem_alloc_range)((t), (s), (a), (b), (sg), \ 444 (n), (r), (f), (l), (h)) 445 #define bus_dmamem_free(t, sg, n) \ 446 (*(t)->_dmamem_free)((t), (sg), (n)) 447 #define bus_dmamem_map(t, sg, n, s, k, f) \ 448 (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) 449 #define bus_dmamem_unmap(t, k, s) \ 450 (*(t)->_dmamem_unmap)((t), (k), (s)) 451 #define bus_dmamem_mmap(t, sg, n, o, p, f) \ 452 (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) 453 454 int _dmamap_create(bus_dma_tag_t, bus_size_t, int, 455 bus_size_t, bus_size_t, int, bus_dmamap_t *); 456 void _dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); 457 int _dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, 458 bus_size_t, struct proc *, int); 459 int _dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); 460 int _dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, struct uio *, int); 461 int _dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, 462 bus_dma_segment_t *, int, bus_size_t, int); 463 int _dmamap_load_buffer(bus_dma_tag_t, bus_dmamap_t, void *, 464 bus_size_t, struct proc *, int, paddr_t *, int *, int); 465 void _dmamap_unload(bus_dma_tag_t, bus_dmamap_t); 466 void _dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 467 bus_size_t, int); 468 469 int _dmamem_alloc(bus_dma_tag_t, bus_size_t, bus_size_t, 470 bus_size_t, bus_dma_segment_t *, int, int *, int); 471 void _dmamem_free(bus_dma_tag_t, bus_dma_segment_t *, int); 472 int _dmamem_map(bus_dma_tag_t, bus_dma_segment_t *, 473 int, size_t, caddr_t *, int); 474 void _dmamem_unmap(bus_dma_tag_t, caddr_t, size_t); 475 paddr_t _dmamem_mmap(bus_dma_tag_t, bus_dma_segment_t *, int, off_t, int, int); 476 int _dmamem_alloc_range(bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t, 477 bus_dma_segment_t *, int, int *, int, paddr_t, paddr_t); 478 479 /* 480 * bus_dmamap_t 481 * 482 * Describes a DMA mapping. 483 */ 484 struct machine_bus_dmamap { 485 /* 486 * PRIVATE MEMBERS: not for use by machine-independent code. 487 */ 488 bus_size_t _dm_size; /* largest DMA transfer mappable */ 489 int _dm_segcnt; /* number of segs this map can map */ 490 bus_size_t _dm_maxsegsz; /* largest possible segment */ 491 bus_size_t _dm_boundary; /* don't cross this */ 492 int _dm_flags; /* misc. flags */ 493 494 void *_dm_cookie; /* cookie for bus-specific functions */ 495 496 /* 497 * PUBLIC MEMBERS: these are used by machine-independent code. 498 */ 499 bus_size_t dm_mapsize; /* size of the mapping */ 500 int dm_nsegs; /* # valid segments in mapping */ 501 bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 502 }; 503 504 int generic_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, 505 bus_space_handle_t *); 506 void generic_space_unmap(bus_space_tag_t, bus_space_handle_t, bus_size_t); 507 int generic_space_region(bus_space_tag_t, bus_space_handle_t, bus_size_t, 508 bus_size_t, bus_space_handle_t *); 509 void *generic_space_vaddr(bus_space_tag_t, bus_space_handle_t); 510 paddr_t generic_space_mmap(bus_space_tag_t, bus_addr_t, off_t, int, int); 511 uint8_t generic_space_read_1(bus_space_tag_t, bus_space_handle_t, bus_size_t); 512 uint16_t generic_space_read_2(bus_space_tag_t, bus_space_handle_t, bus_size_t); 513 uint32_t generic_space_read_4(bus_space_tag_t, bus_space_handle_t, bus_size_t); 514 uint64_t generic_space_read_8(bus_space_tag_t, bus_space_handle_t, bus_size_t); 515 void generic_space_read_raw_2(bus_space_tag_t, bus_space_handle_t, 516 bus_addr_t, uint8_t *, bus_size_t); 517 void generic_space_write_1(bus_space_tag_t, bus_space_handle_t, bus_size_t, 518 uint8_t); 519 void generic_space_write_2(bus_space_tag_t, bus_space_handle_t, bus_size_t, 520 uint16_t); 521 void generic_space_write_4(bus_space_tag_t, bus_space_handle_t, bus_size_t, 522 uint32_t); 523 void generic_space_write_8(bus_space_tag_t, bus_space_handle_t, bus_size_t, 524 uint64_t); 525 void generic_space_write_raw_2(bus_space_tag_t, bus_space_handle_t, 526 bus_addr_t, const uint8_t *, bus_size_t); 527 void generic_space_read_raw_4(bus_space_tag_t, bus_space_handle_t, 528 bus_addr_t, uint8_t *, bus_size_t); 529 void generic_space_write_raw_4(bus_space_tag_t, bus_space_handle_t, 530 bus_addr_t, const uint8_t *, bus_size_t); 531 void generic_space_read_raw_8(bus_space_tag_t, bus_space_handle_t, 532 bus_addr_t, uint8_t *, bus_size_t); 533 void generic_space_write_raw_8(bus_space_tag_t, bus_space_handle_t, 534 bus_addr_t, const uint8_t *, bus_size_t); 535 536 #endif /* _MACHINE_BUS_H_ */ 537