bus.h revision 1.6
1 /* $NetBSD: bus.h,v 1.6 2008/04/28 20:23:18 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998, 2000, 2001, 2005 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) 1996 Carnegie-Mellon University. 35 * All rights reserved. 36 * 37 * Author: Chris G. Demetriou 38 * 39 * Permission to use, copy, modify and distribute this software and 40 * its documentation is hereby granted, provided that both the copyright 41 * notice and this permission notice appear in all copies of the 42 * software, derivative works or modified versions, and any portions 43 * thereof, and that both notices appear in supporting documentation. 44 * 45 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 46 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 47 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 48 * 49 * Carnegie Mellon requests users of this software to return to 50 * 51 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 52 * School of Computer Science 53 * Carnegie Mellon University 54 * Pittsburgh PA 15213-3890 55 * 56 * any improvements or extensions that they make and grant Carnegie the 57 * rights to redistribute these changes. 58 */ 59 60 #ifndef _EWS4800MIPS_BUS_H_ 61 #define _EWS4800MIPS_BUS_H_ 62 63 #include <sys/types.h> 64 #ifdef _KERNEL 65 /* 66 * Turn on BUS_SPACE_DEBUG if the global DEBUG option is enabled. 67 */ 68 #if defined(DEBUG) && !defined(BUS_SPACE_DEBUG) 69 #define BUS_SPACE_DEBUG 70 #endif 71 72 #ifdef BUS_SPACE_DEBUG 73 #include <sys/systm.h> /* for printf() prototype */ 74 /* 75 * Macros for checking the aligned-ness of pointers passed to bus 76 * space ops. Strict alignment is required by the MIPS architecture, 77 * and a trap will occur if unaligned access is performed. These 78 * may aid in the debugging of a broken device driver by displaying 79 * useful information about the problem. 80 */ 81 #define __BUS_SPACE_ALIGNED_ADDRESS(p, t) \ 82 ((((uint32_t)(p)) & (sizeof(t)-1)) == 0) 83 84 #define __BUS_SPACE_ADDRESS_SANITY(p, t, d) \ 85 ({ \ 86 if (__BUS_SPACE_ALIGNED_ADDRESS((p), t) == 0) { \ 87 printf("%s 0x%x not aligned to %u bytes %s:%d\n", \ 88 d, (uint32_t)(p), (uint32_t)sizeof(t), __FILE__, \ 89 __LINE__); \ 90 } \ 91 (void) 0; \ 92 }) 93 94 #define BUS_SPACE_ALIGNED_POINTER(p, t) __BUS_SPACE_ALIGNED_ADDRESS(p, t) 95 #else 96 #define __BUS_SPACE_ADDRESS_SANITY(p, t, d) (void) 0 97 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) 98 #endif /* BUS_SPACE_DEBUG */ 99 #endif /* _KERNEL */ 100 101 /* 102 * Addresses (in bus space). 103 */ 104 typedef long bus_addr_t; 105 typedef long bus_size_t; 106 107 /* 108 * Access methods for bus space. 109 */ 110 typedef struct ews4800mips_bus_space *bus_space_tag_t; 111 typedef bus_addr_t bus_space_handle_t; 112 113 struct extent; /* forward declaration */ 114 115 struct ews4800mips_bus_space { 116 struct extent *ebs_extent; 117 bus_addr_t ebs_base_addr; 118 bus_size_t ebs_size; 119 120 /* cookie */ 121 void *ebs_cookie; 122 123 /* mapping/unmapping */ 124 int (*ebs_map)(void *, bus_addr_t, bus_size_t, 125 int, bus_space_handle_t *); 126 void (*ebs_unmap)(void *, bus_space_handle_t, 127 bus_size_t); 128 int (*ebs_subregion)(void *, bus_space_handle_t, 129 bus_size_t, bus_size_t, bus_space_handle_t *); 130 131 /* allocation/deallocation */ 132 int (*ebs_alloc)(void *, bus_addr_t, bus_addr_t, 133 bus_size_t, bus_size_t, bus_size_t, int, 134 bus_addr_t *, bus_space_handle_t *); 135 void (*ebs_free)(void *, bus_space_handle_t, 136 bus_size_t); 137 138 /* get kernel virtual address */ 139 void * (*ebs_vaddr)(void *, bus_space_handle_t); 140 141 /* read (single) */ 142 uint8_t (*ebs_r_1)(void *, bus_space_handle_t, 143 bus_size_t); 144 uint16_t (*ebs_r_2)(void *, bus_space_handle_t, 145 bus_size_t); 146 uint32_t (*ebs_r_4)(void *, bus_space_handle_t, 147 bus_size_t); 148 uint64_t (*ebs_r_8)(void *, bus_space_handle_t, 149 bus_size_t); 150 151 /* read multiple */ 152 void (*ebs_rm_1)(void *, bus_space_handle_t, 153 bus_size_t, uint8_t *, bus_size_t); 154 void (*ebs_rm_2)(void *, bus_space_handle_t, 155 bus_size_t, uint16_t *, bus_size_t); 156 void (*ebs_rm_4)(void *, bus_space_handle_t, 157 bus_size_t, uint32_t *, bus_size_t); 158 void (*ebs_rm_8)(void *, bus_space_handle_t, 159 bus_size_t, uint64_t *, bus_size_t); 160 161 /* read region */ 162 void (*ebs_rr_1)(void *, bus_space_handle_t, 163 bus_size_t, uint8_t *, bus_size_t); 164 void (*ebs_rr_2)(void *, bus_space_handle_t, 165 bus_size_t, uint16_t *, bus_size_t); 166 void (*ebs_rr_4)(void *, bus_space_handle_t, 167 bus_size_t, uint32_t *, bus_size_t); 168 void (*ebs_rr_8)(void *, bus_space_handle_t, 169 bus_size_t, uint64_t *, bus_size_t); 170 171 /* write (single) */ 172 void (*ebs_w_1)(void *, bus_space_handle_t, 173 bus_size_t, uint8_t); 174 void (*ebs_w_2)(void *, bus_space_handle_t, 175 bus_size_t, uint16_t); 176 void (*ebs_w_4)(void *, bus_space_handle_t, 177 bus_size_t, uint32_t); 178 void (*ebs_w_8)(void *, bus_space_handle_t, 179 bus_size_t, uint64_t); 180 181 /* write multiple */ 182 void (*ebs_wm_1)(void *, bus_space_handle_t, 183 bus_size_t, const uint8_t *, bus_size_t); 184 void (*ebs_wm_2)(void *, bus_space_handle_t, 185 bus_size_t, const uint16_t *, bus_size_t); 186 void (*ebs_wm_4)(void *, bus_space_handle_t, 187 bus_size_t, const uint32_t *, bus_size_t); 188 void (*ebs_wm_8)(void *, bus_space_handle_t, 189 bus_size_t, const uint64_t *, bus_size_t); 190 191 /* write region */ 192 void (*ebs_wr_1)(void *, bus_space_handle_t, 193 bus_size_t, const uint8_t *, bus_size_t); 194 void (*ebs_wr_2)(void *, bus_space_handle_t, 195 bus_size_t, const uint16_t *, bus_size_t); 196 void (*ebs_wr_4)(void *, bus_space_handle_t, 197 bus_size_t, const uint32_t *, bus_size_t); 198 void (*ebs_wr_8)(void *, bus_space_handle_t, 199 bus_size_t, const uint64_t *, bus_size_t); 200 201 /* set multiple */ 202 void (*ebs_sm_1)(void *, bus_space_handle_t, 203 bus_size_t, uint8_t, bus_size_t); 204 void (*ebs_sm_2)(void *, bus_space_handle_t, 205 bus_size_t, uint16_t, bus_size_t); 206 void (*ebs_sm_4)(void *, bus_space_handle_t, 207 bus_size_t, uint32_t, bus_size_t); 208 void (*ebs_sm_8)(void *, bus_space_handle_t, 209 bus_size_t, uint64_t, bus_size_t); 210 211 /* set region */ 212 void (*ebs_sr_1)(void *, bus_space_handle_t, 213 bus_size_t, uint8_t, bus_size_t); 214 void (*ebs_sr_2)(void *, bus_space_handle_t, 215 bus_size_t, uint16_t, bus_size_t); 216 void (*ebs_sr_4)(void *, bus_space_handle_t, 217 bus_size_t, uint32_t, bus_size_t); 218 void (*ebs_sr_8)(void *, bus_space_handle_t, 219 bus_size_t, uint64_t, bus_size_t); 220 221 /* copy */ 222 void (*ebs_c_1)(void *, bus_space_handle_t, bus_size_t, 223 bus_space_handle_t, bus_size_t, bus_size_t); 224 void (*ebs_c_2)(void *, bus_space_handle_t, bus_size_t, 225 bus_space_handle_t, bus_size_t, bus_size_t); 226 void (*ebs_c_4)(void *, bus_space_handle_t, bus_size_t, 227 bus_space_handle_t, bus_size_t, bus_size_t); 228 void (*ebs_c_8)(void *, bus_space_handle_t, bus_size_t, 229 bus_space_handle_t, bus_size_t, bus_size_t); 230 }; 231 232 #ifdef _KERNEL 233 /* Don't use locore.h wbflush */ 234 #undef wbflush 235 #define wbflush() platform.wbflush() 236 #ifdef _EWS4800MIPS_BUS_SPACE_PRIVATE 237 238 #ifndef __read_1 239 #define __read_1(a) (*(volatile uint8_t *)(a)) 240 #endif 241 #ifndef __read_2 242 #define __read_2(a) (*(volatile uint16_t *)(a)) 243 #endif 244 #ifndef __read_4 245 #define __read_4(a) (*(volatile uint32_t *)(a)) 246 #endif 247 #ifndef __read_8 248 #define __read_8(a) (*(volatile uint64_t *)(a)) 249 #endif 250 #define __read_16(a) "error. not yet" 251 252 #ifndef __write_1 253 #define __write_1(a, v) { \ 254 *(volatile uint8_t *)(a) = (v); \ 255 wbflush(); \ 256 } 257 #endif 258 #ifndef __write_2 259 #define __write_2(a, v) { \ 260 *(volatile uint16_t *)(a) = (v); \ 261 wbflush(); \ 262 } 263 #endif 264 #ifndef __write_4 265 #define __write_4(a, v) { \ 266 *(volatile uint32_t *)(a) = (v); \ 267 wbflush(); \ 268 } 269 #endif 270 #ifndef __write_8 271 #define __write_8(a, v) { \ 272 *(volatile uint64_t *)(a) = (v); \ 273 wbflush(); \ 274 } 275 #endif 276 277 #define __TYPENAME(BITS) uint##BITS##_t 278 279 #define _BUS_SPACE_READ(PREFIX, BYTES, BITS) \ 280 static __TYPENAME(BITS) \ 281 PREFIX##_read_##BYTES(void *, bus_space_handle_t, bus_size_t); \ 282 static __TYPENAME(BITS) \ 283 PREFIX##_read_##BYTES(void *tag, bus_space_handle_t bsh, \ 284 bus_size_t offset) \ 285 { \ 286 return __read_##BYTES(VADDR(bsh, offset)); \ 287 } 288 289 #define _BUS_SPACE_READ_MULTI(PREFIX, BYTES, BITS) \ 290 static void \ 291 PREFIX##_read_multi_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 292 __TYPENAME(BITS) *, bus_size_t); \ 293 static void \ 294 PREFIX##_read_multi_##BYTES(void *tag, bus_space_handle_t bsh, \ 295 bus_size_t offset, __TYPENAME(BITS) *addr, bus_size_t count) \ 296 { \ 297 bus_addr_t a = VADDR(bsh, offset); \ 298 while (count--) \ 299 *addr++ = __read_##BYTES(a); \ 300 } 301 302 #define _BUS_SPACE_READ_REGION(PREFIX, BYTES, BITS) \ 303 static void \ 304 PREFIX##_read_region_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 305 __TYPENAME(BITS) *, bus_size_t); \ 306 static void \ 307 PREFIX##_read_region_##BYTES(void *tag, bus_space_handle_t bsh, \ 308 bus_size_t offset, __TYPENAME(BITS) *addr, bus_size_t count) \ 309 { \ 310 while (count--) { \ 311 *addr++ = __read_##BYTES(VADDR(bsh, offset)); \ 312 offset += BYTES; \ 313 } \ 314 } 315 316 #define _BUS_SPACE_WRITE(PREFIX, BYTES, BITS) \ 317 static void \ 318 PREFIX##_write_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 319 __TYPENAME(BITS)); \ 320 static void \ 321 PREFIX##_write_##BYTES(void *tag, bus_space_handle_t bsh, \ 322 bus_size_t offset, __TYPENAME(BITS) value) \ 323 { \ 324 __write_##BYTES(VADDR(bsh, offset), value); \ 325 } 326 327 #define _BUS_SPACE_WRITE_MULTI(PREFIX, BYTES, BITS) \ 328 static void \ 329 PREFIX##_write_multi_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 330 const __TYPENAME(BITS) *, bus_size_t); \ 331 static void \ 332 PREFIX##_write_multi_##BYTES(void *tag, bus_space_handle_t bsh, \ 333 bus_size_t offset, const __TYPENAME(BITS) *addr, bus_size_t count) \ 334 { \ 335 bus_addr_t a = VADDR(bsh, offset); \ 336 while (count--) { \ 337 __write_##BYTES(a, *addr++); \ 338 } \ 339 } 340 341 #define _BUS_SPACE_WRITE_REGION(PREFIX, BYTES, BITS) \ 342 static void \ 343 PREFIX##_write_region_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 344 const __TYPENAME(BITS) *, bus_size_t); \ 345 static void \ 346 PREFIX##_write_region_##BYTES(void *tag, bus_space_handle_t bsh, \ 347 bus_size_t offset, const __TYPENAME(BITS) *addr, bus_size_t count) \ 348 { \ 349 while (count--) { \ 350 __write_##BYTES(VADDR(bsh, offset), *addr++); \ 351 offset += BYTES; \ 352 } \ 353 } 354 355 #define _BUS_SPACE_SET_MULTI(PREFIX, BYTES, BITS) \ 356 static void \ 357 PREFIX##_set_multi_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 358 __TYPENAME(BITS), bus_size_t); \ 359 static void \ 360 PREFIX##_set_multi_##BYTES(void *tag, bus_space_handle_t bsh, \ 361 bus_size_t offset, __TYPENAME(BITS) value, bus_size_t count) \ 362 { \ 363 bus_addr_t a = VADDR(bsh, offset); \ 364 while (count--) { \ 365 __write_##BYTES(a, value); \ 366 } \ 367 } 368 369 #define _BUS_SPACE_SET_REGION(PREFIX, BYTES, BITS) \ 370 static void \ 371 PREFIX##_set_region_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 372 __TYPENAME(BITS), bus_size_t); \ 373 static void \ 374 PREFIX##_set_region_##BYTES(void *tag, bus_space_handle_t bsh, \ 375 bus_size_t offset, __TYPENAME(BITS) value, bus_size_t count) \ 376 { \ 377 while (count--) { \ 378 __write_##BYTES(VADDR(bsh, offset), value); \ 379 offset += BYTES; \ 380 } \ 381 } 382 383 #define _BUS_SPACE_COPY_REGION(PREFIX, BYTES, BITS) \ 384 static void \ 385 PREFIX##_copy_region_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 386 bus_space_handle_t, bus_size_t, bus_size_t); \ 387 static void \ 388 PREFIX##_copy_region_##BYTES(void *t, bus_space_handle_t h1, \ 389 bus_size_t o1, bus_space_handle_t h2, bus_size_t o2, bus_size_t c) \ 390 { \ 391 bus_size_t o; \ 392 if ((h1 + o1) >= (h2 + o2)) { \ 393 /* src after dest: copy forward */ \ 394 for (o = 0; c != 0; c--, o += BYTES) \ 395 __write_##BYTES(VADDR(h2, o2 + o), \ 396 __read_##BYTES(VADDR(h1, o1 + o))); \ 397 } else { \ 398 /* dest after src: copy backwards */ \ 399 for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \ 400 __write_##BYTES(VADDR(h2, o2 + o), \ 401 __read_##BYTES(VADDR(h1, o1 + o))); \ 402 } \ 403 } 404 405 #define _BUS_SPACE_NO_MAP \ 406 (int (*)(void *, bus_addr_t, bus_size_t, int, \ 407 bus_space_handle_t *))_bus_space_invalid_access 408 #define _BUS_SPACE_NO_UNMAP \ 409 (void (*)(void *, bus_space_handle_t, bus_size_t)) \ 410 _bus_space_invalid_access 411 #define _BUS_SPACE_NO_SUBREGION \ 412 (int (*)(void *, bus_space_handle_t, bus_size_t, bus_size_t, \ 413 bus_space_handle_t *))_bus_space_invalid_access 414 #define _BUS_SPACE_NO_ALLOC \ 415 (int (*)(void *, bus_addr_t, bus_addr_t, bus_size_t, bus_size_t,\ 416 bus_size_t, int, bus_addr_t *, bus_space_handle_t *)) \ 417 _bus_space_invalid_access 418 #define _BUS_SPACE_NO_FREE \ 419 (void (*)(void *, bus_space_handle_t, bus_size_t)) \ 420 _bus_space_invalid_access 421 #define _BUS_SPACE_NO_VADDR \ 422 (void *(*)(void *, bus_space_handle_t))_bus_space_invalid_access 423 #define _BUS_SPACE_NO_READ(BYTES, BITS) \ 424 (uint##BITS##_t (*)(void *, bus_space_handle_t, bus_size_t)) \ 425 _bus_space_invalid_access 426 #define _BUS_SPACE_NO_READ_MULTI(BYTES, BITS) \ 427 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 428 uint##BITS##_t *, bus_size_t))_bus_space_invalid_access 429 #define _BUS_SPACE_NO_READ_REGION(BYTES, BITS) \ 430 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 431 uint##BITS##_t *, bus_size_t))_bus_space_invalid_access 432 #define _BUS_SPACE_NO_WRITE(BYTES, BITS) \ 433 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 434 uint##BITS##_t))_bus_space_invalid_access 435 #define _BUS_SPACE_NO_WRITE_MULTI(BYTES, BITS) \ 436 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 437 const uint##BITS##_t *, bus_size_t))_bus_space_invalid_access 438 #define _BUS_SPACE_NO_WRITE_REGION(BYTES, BITS) \ 439 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 440 const uint##BITS##_t *, bus_size_t))_bus_space_invalid_access 441 #define _BUS_SPACE_NO_SET_MULTI(BYTES, BITS) \ 442 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 443 uint##BITS##_t, bus_size_t))_bus_space_invalid_access 444 #define _BUS_SPACE_NO_SET_REGION(BYTES, BITS) \ 445 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 446 uint##BITS##_t, bus_size_t))_bus_space_invalid_access 447 #define _BUS_SPACE_NO_COPY_REGION(BYTES, BITS) \ 448 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 449 bus_space_handle_t, bus_size_t, bus_size_t))_bus_space_invalid_access 450 451 void _bus_space_invalid_access(void); 452 #endif /* _EWS4800MIPS_BUS_SPACE_PRIVATE */ 453 454 #define __ebs_c(a,b) __CONCAT(a,b) 455 #define __ebs_opname(op,size) __ebs_c(__ebs_c(__ebs_c(ebs_,op),_),size) 456 457 #define __ebs_rs(sz, tn, t, h, o) \ 458 (__BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"), \ 459 (*(t)->__ebs_opname(r,sz))((t)->ebs_cookie, h, o)) 460 461 #define __ebs_ws(sz, tn, t, h, o, v) \ 462 ({ \ 463 __BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"); \ 464 (*(t)->__ebs_opname(w,sz))((t)->ebs_cookie, h, o, v); \ 465 }) 466 467 #define __ebs_nonsingle(type, sz, tn, t, h, o, a, c) \ 468 ({ \ 469 __BUS_SPACE_ADDRESS_SANITY((a), tn, "buffer"); \ 470 __BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"); \ 471 (*(t)->__ebs_opname(type,sz))((t)->ebs_cookie, h, o, a, c); \ 472 }) 473 474 #define __ebs_set(type, sz, tn, t, h, o, v, c) \ 475 ({ \ 476 __BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"); \ 477 (*(t)->__ebs_opname(type,sz))((t)->ebs_cookie, h, o, v, c); \ 478 }) 479 480 #define __ebs_copy(sz, tn, t, h1, o1, h2, o2, cnt) \ 481 ({ \ 482 __BUS_SPACE_ADDRESS_SANITY((h1) + (o1), tn, "bus addr 1"); \ 483 __BUS_SPACE_ADDRESS_SANITY((h2) + (o2), tn, "bus addr 2"); \ 484 (*(t)->__ebs_opname(c,sz))((t)->ebs_cookie, h1, o1, h2, o2, cnt); \ 485 }) 486 487 /* 488 * Create/destroy default bus_space tag. 489 */ 490 int bus_space_create(bus_space_tag_t, const char *, bus_addr_t, bus_size_t); 491 void bus_space_destroy(bus_space_tag_t); 492 493 /* 494 * Mapping and unmapping operations. 495 */ 496 #define bus_space_map(t, a, s, f, hp) \ 497 (*(t)->ebs_map)((t)->ebs_cookie, (a), (s), (f), (hp)) 498 #define bus_space_unmap(t, h, s) \ 499 (*(t)->ebs_unmap)((t)->ebs_cookie, (h), (s)) 500 #define bus_space_subregion(t, h, o, s, hp) \ 501 (*(t)->ebs_subregion)((t)->ebs_cookie, (h), (o), (s), (hp)) 502 503 #endif /* _KERNEL */ 504 505 #define BUS_SPACE_MAP_CACHEABLE 0x01 506 #define BUS_SPACE_MAP_LINEAR 0x02 507 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 508 509 #ifdef _KERNEL 510 /* 511 * Allocation and deallocation operations. 512 */ 513 #define bus_space_alloc(t, rs, re, s, a, b, f, ap, hp) \ 514 (*(t)->ebs_alloc)((t)->ebs_cookie, (rs), (re), (s), (a), (b), \ 515 (f), (ap), (hp)) 516 #define bus_space_free(t, h, s) \ 517 (*(t)->ebs_free)((t)->ebs_cookie, (h), (s)) 518 519 /* 520 * Get kernel virtual address for ranges mapped BUS_SPACE_MAP_LINEAR. 521 */ 522 #define bus_space_vaddr(t, h) \ 523 (*(t)->ebs_vaddr)((t)->ebs_cookie, (h)) 524 525 /* 526 * Bus read/write barrier methods. 527 * 528 * void bus_space_barrier(bus_space_tag_t tag, 529 * bus_space_handle_t bsh, bus_size_t offset, 530 * bus_size_t len, int flags); 531 * 532 * On the MIPS, we just flush the write buffer. 533 */ 534 #define bus_space_barrier(t, h, o, l, f) \ 535 ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f), \ 536 wbflush())) 537 #define BUS_SPACE_BARRIER_READ 0x01 538 #define BUS_SPACE_BARRIER_WRITE 0x02 539 540 541 /* 542 * Bus read (single) operations. 543 */ 544 #define bus_space_read_1(t, h, o) __ebs_rs(1,uint8_t,(t),(h),(o)) 545 #define bus_space_read_2(t, h, o) __ebs_rs(2,uint16_t,(t),(h),(o)) 546 #define bus_space_read_4(t, h, o) __ebs_rs(4,uint32_t,(t),(h),(o)) 547 #define bus_space_read_8(t, h, o) __ebs_rs(8,uint64_t,(t),(h),(o)) 548 549 550 /* 551 * Bus read multiple operations. 552 */ 553 #define bus_space_read_multi_1(t, h, o, a, c) \ 554 __ebs_nonsingle(rm,1,uint8_t,(t),(h),(o),(a),(c)) 555 #define bus_space_read_multi_2(t, h, o, a, c) \ 556 __ebs_nonsingle(rm,2,uint16_t,(t),(h),(o),(a),(c)) 557 #define bus_space_read_multi_4(t, h, o, a, c) \ 558 __ebs_nonsingle(rm,4,uint32_t,(t),(h),(o),(a),(c)) 559 #define bus_space_read_multi_8(t, h, o, a, c) \ 560 __ebs_nonsingle(rm,8,uint64_t,(t),(h),(o),(a),(c)) 561 562 563 /* 564 * Bus read region operations. 565 */ 566 #define bus_space_read_region_1(t, h, o, a, c) \ 567 __ebs_nonsingle(rr,1,uint8_t,(t),(h),(o),(a),(c)) 568 #define bus_space_read_region_2(t, h, o, a, c) \ 569 __ebs_nonsingle(rr,2,uint16_t,(t),(h),(o),(a),(c)) 570 #define bus_space_read_region_4(t, h, o, a, c) \ 571 __ebs_nonsingle(rr,4,uint32_t,(t),(h),(o),(a),(c)) 572 #define bus_space_read_region_8(t, h, o, a, c) \ 573 __ebs_nonsingle(rr,8,uint64_t,(t),(h),(o),(a),(c)) 574 575 576 /* 577 * Bus write (single) operations. 578 */ 579 #define bus_space_write_1(t, h, o, v) __ebs_ws(1,uint8_t,(t),(h),(o),(v)) 580 #define bus_space_write_2(t, h, o, v) __ebs_ws(2,uint16_t,(t),(h),(o),(v)) 581 #define bus_space_write_4(t, h, o, v) __ebs_ws(4,uint32_t,(t),(h),(o),(v)) 582 #define bus_space_write_8(t, h, o, v) __ebs_ws(8,uint64_t,(t),(h),(o),(v)) 583 584 585 /* 586 * Bus write multiple operations. 587 */ 588 #define bus_space_write_multi_1(t, h, o, a, c) \ 589 __ebs_nonsingle(wm,1,uint8_t,(t),(h),(o),(a),(c)) 590 #define bus_space_write_multi_2(t, h, o, a, c) \ 591 __ebs_nonsingle(wm,2,uint16_t,(t),(h),(o),(a),(c)) 592 #define bus_space_write_multi_4(t, h, o, a, c) \ 593 __ebs_nonsingle(wm,4,uint32_t,(t),(h),(o),(a),(c)) 594 #define bus_space_write_multi_8(t, h, o, a, c) \ 595 __ebs_nonsingle(wm,8,uint64_t,(t),(h),(o),(a),(c)) 596 597 598 /* 599 * Bus write region operations. 600 */ 601 #define bus_space_write_region_1(t, h, o, a, c) \ 602 __ebs_nonsingle(wr,1,uint8_t,(t),(h),(o),(a),(c)) 603 #define bus_space_write_region_2(t, h, o, a, c) \ 604 __ebs_nonsingle(wr,2,uint16_t,(t),(h),(o),(a),(c)) 605 #define bus_space_write_region_4(t, h, o, a, c) \ 606 __ebs_nonsingle(wr,4,uint32_t,(t),(h),(o),(a),(c)) 607 #define bus_space_write_region_8(t, h, o, a, c) \ 608 __ebs_nonsingle(wr,8,uint64_t,(t),(h),(o),(a),(c)) 609 610 611 /* 612 * Set multiple operations. 613 */ 614 #define bus_space_set_multi_1(t, h, o, v, c) \ 615 __ebs_set(sm,1,uint8_t,(t),(h),(o),(v),(c)) 616 #define bus_space_set_multi_2(t, h, o, v, c) \ 617 __ebs_set(sm,2,uint16_t,(t),(h),(o),(v),(c)) 618 #define bus_space_set_multi_4(t, h, o, v, c) \ 619 __ebs_set(sm,4,uint32_t,(t),(h),(o),(v),(c)) 620 #define bus_space_set_multi_8(t, h, o, v, c) \ 621 __ebs_set(sm,8,uint64_t,(t),(h),(o),(v),(c)) 622 623 624 /* 625 * Set region operations. 626 */ 627 #define bus_space_set_region_1(t, h, o, v, c) \ 628 __ebs_set(sr,1,uint8_t,(t),(h),(o),(v),(c)) 629 #define bus_space_set_region_2(t, h, o, v, c) \ 630 __ebs_set(sr,2,uint16_t,(t),(h),(o),(v),(c)) 631 #define bus_space_set_region_4(t, h, o, v, c) \ 632 __ebs_set(sr,4,uint32_t,(t),(h),(o),(v),(c)) 633 #define bus_space_set_region_8(t, h, o, v, c) \ 634 __ebs_set(sr,8,uint64_t,(t),(h),(o),(v),(c)) 635 636 637 /* 638 * Copy region operations. 639 */ 640 #define bus_space_copy_region_1(t, h1, o1, h2, o2, c) \ 641 __ebs_copy(1, uint8_t, (t), (h1), (o1), (h2), (o2), (c)) 642 #define bus_space_copy_region_2(t, h1, o1, h2, o2, c) \ 643 __ebs_copy(2, uint16_t, (t), (h1), (o1), (h2), (o2), (c)) 644 #define bus_space_copy_region_4(t, h1, o1, h2, o2, c) \ 645 __ebs_copy(4, uint32_t, (t), (h1), (o1), (h2), (o2), (c)) 646 #define bus_space_copy_region_8(t, h1, o1, h2, o2, c) \ 647 __ebs_copy(8, uint64_t, (t), (h1), (o1), (h2), (o2), (c)) 648 649 /* 650 * Bus stream operations--defined in terms of non-stream counterparts 651 */ 652 #define __BUS_SPACE_HAS_STREAM_METHODS 1 653 #define bus_space_read_stream_1 bus_space_read_1 654 #define bus_space_read_stream_2 bus_space_read_2 655 #define bus_space_read_stream_4 bus_space_read_4 656 #define bus_space_read_stream_8 bus_space_read_8 657 #define bus_space_read_multi_stream_1 bus_space_read_multi_1 658 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 659 #define bus_space_read_multi_stream_4 bus_space_read_multi_4 660 #define bus_space_read_multi_stream_8 bus_space_read_multi_8 661 #define bus_space_read_region_stream_1 bus_space_read_region_1 662 #define bus_space_read_region_stream_2 bus_space_read_region_2 663 #define bus_space_read_region_stream_4 bus_space_read_region_4 664 #define bus_space_read_region_stream_8 bus_space_read_region_8 665 #define bus_space_write_stream_1 bus_space_write_1 666 #define bus_space_write_stream_2 bus_space_write_2 667 #define bus_space_write_stream_4 bus_space_write_4 668 #define bus_space_write_stream_8 bus_space_write_8 669 #define bus_space_write_multi_stream_1 bus_space_write_multi_1 670 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 671 #define bus_space_write_multi_stream_4 bus_space_write_multi_4 672 #define bus_space_write_multi_stream_8 bus_space_write_multi_8 673 #define bus_space_write_region_stream_1 bus_space_write_region_1 674 #define bus_space_write_region_stream_2 bus_space_write_region_2 675 #define bus_space_write_region_stream_4 bus_space_write_region_4 676 #define bus_space_write_region_stream_8 bus_space_write_region_8 677 678 #endif /* _KERNEL */ 679 680 /* 681 * Flags used in various bus DMA methods. 682 */ 683 #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */ 684 #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */ 685 #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */ 686 #define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */ 687 #define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */ 688 #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */ 689 #define BUS_DMA_BUS2 0x020 690 #define BUS_DMA_BUS3 0x040 691 #define BUS_DMA_BUS4 0x080 692 #define BUS_DMA_READ 0x100 /* mapping is device -> memory only */ 693 #define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */ 694 #define BUS_DMA_NOCACHE 0x400 /* hint: map non-cached memory */ 695 696 #define EWS4800MIPS_DMAMAP_COHERENT 0x10000 /* no cache flush necessary on sync */ 697 698 /* Forwards needed by prototypes below. */ 699 struct mbuf; 700 struct uio; 701 702 /* 703 * Operations performed by bus_dmamap_sync(). 704 */ 705 #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ 706 #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ 707 #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ 708 #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ 709 710 typedef struct ews4800mips_bus_dma_tag *bus_dma_tag_t; 711 typedef struct ews4800mips_bus_dmamap *bus_dmamap_t; 712 713 #define BUS_DMA_TAG_VALID(t) ((t) != (bus_dma_tag_t)0) 714 715 /* 716 * bus_dma_segment_t 717 * 718 * Describes a single contiguous DMA transaction. Values 719 * are suitable for programming into DMA registers. 720 */ 721 struct ews4800mips_bus_dma_segment { 722 bus_addr_t ds_addr; /* DMA address */ 723 bus_size_t ds_len; /* length of transfer */ 724 vaddr_t _ds_vaddr; /* virtual address, 0 if invalid */ 725 }; 726 typedef struct ews4800mips_bus_dma_segment bus_dma_segment_t; 727 728 /* 729 * bus_dma_tag_t 730 * 731 * A machine-dependent opaque type describing the implementation of 732 * DMA for a given bus. 733 */ 734 735 struct ews4800mips_bus_dma_tag { 736 /* 737 * DMA mapping methods. 738 */ 739 int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int, 740 bus_size_t, bus_size_t, int, bus_dmamap_t *); 741 void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t); 742 int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *, 743 bus_size_t, struct proc *, int); 744 int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t, 745 struct mbuf *, int); 746 int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t, 747 struct uio *, int); 748 int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t, 749 bus_dma_segment_t *, int, bus_size_t, int); 750 void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t); 751 void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t, 752 bus_addr_t, bus_size_t, int); 753 754 /* 755 * DMA memory utility functions. 756 */ 757 int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t, 758 bus_size_t, bus_dma_segment_t *, int, int *, int); 759 void (*_dmamem_free)(bus_dma_tag_t, 760 bus_dma_segment_t *, int); 761 int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *, 762 int, size_t, void **, int); 763 void (*_dmamem_unmap)(bus_dma_tag_t, void *, size_t); 764 paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *, 765 int, off_t, int, int); 766 767 /* 768 * DMA controller private. 769 */ 770 void *_dmachip_cookie; 771 }; 772 773 #define bus_dmamap_create(t, s, n, m, b, f, p) \ 774 (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) 775 #define bus_dmamap_destroy(t, p) \ 776 (*(t)->_dmamap_destroy)((t), (p)) 777 #define bus_dmamap_load(t, m, b, s, p, f) \ 778 (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) 779 #define bus_dmamap_load_mbuf(t, m, b, f) \ 780 (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) 781 #define bus_dmamap_load_uio(t, m, u, f) \ 782 (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) 783 #define bus_dmamap_load_raw(t, m, sg, n, s, f) \ 784 (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) 785 #define bus_dmamap_unload(t, p) \ 786 (*(t)->_dmamap_unload)((t), (p)) 787 #define bus_dmamap_sync(t, p, o, l, ops) \ 788 (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops)) 789 790 #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ 791 (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) 792 #define bus_dmamem_free(t, sg, n) \ 793 (*(t)->_dmamem_free)((t), (sg), (n)) 794 #define bus_dmamem_map(t, sg, n, s, k, f) \ 795 (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) 796 #define bus_dmamem_unmap(t, k, s) \ 797 (*(t)->_dmamem_unmap)((t), (k), (s)) 798 #define bus_dmamem_mmap(t, sg, n, o, p, f) \ 799 (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) 800 801 #define bus_dmatag_subregion(t, mna, mxa, nt, f) EOPNOTSUPP 802 #define bus_dmatag_destroy(t) 803 804 /* 805 * bus_dmamap_t 806 * 807 * Describes a DMA mapping. 808 */ 809 struct ews4800mips_bus_dmamap { 810 /* 811 * PRIVATE MEMBERS: not for use my machine-independent code. 812 */ 813 bus_size_t _dm_size; /* largest DMA transfer mappable */ 814 int _dm_segcnt; /* number of segs this map can map */ 815 bus_size_t _dm_maxmaxsegsz; /* fixed largest possible segment */ 816 bus_size_t _dm_boundary; /* don't cross this */ 817 int _dm_flags; /* misc. flags */ 818 struct vmspace *_dm_vmspace; /* vmspace that owns the mapping */ 819 820 /* 821 * PUBLIC MEMBERS: these are used by machine-independent code. 822 */ 823 bus_size_t dm_maxsegsz; /* largest possible segment */ 824 bus_size_t dm_mapsize; /* size of the mapping */ 825 int dm_nsegs; /* # valid segments in mapping */ 826 bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 827 }; 828 829 #ifdef _EWS4800MIPS_BUS_DMA_PRIVATE 830 int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t, 831 bus_size_t, int, bus_dmamap_t *); 832 void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); 833 int _bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, 834 bus_size_t, struct proc *, int); 835 int _bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, 836 struct mbuf *, int); 837 int _bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, 838 struct uio *, int); 839 int _bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, 840 bus_dma_segment_t *, int, bus_size_t, int); 841 void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); 842 void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 843 bus_size_t, int); 844 845 int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size, 846 bus_size_t alignment, bus_size_t boundary, 847 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags); 848 void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs, 849 int nsegs); 850 int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs, 851 int nsegs, size_t size, void **kvap, int flags); 852 void _bus_dmamem_unmap(bus_dma_tag_t tag, void *kva, 853 size_t size); 854 paddr_t _bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs, 855 int nsegs, off_t off, int prot, int flags); 856 857 int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size, 858 bus_size_t alignment, bus_size_t boundary, 859 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, 860 vaddr_t low, vaddr_t high); 861 862 extern struct ews4800mips_bus_dma_tag ews4800mips_default_bus_dma_tag; 863 #endif /* _EWS4800MIPS_BUS_DMA_PRIVATE */ 864 865 #endif /* _EWS4800MIPS_BUS_H_ */ 866
Indexes created Wed Oct 22 13:09:56 GMT 2025