1 /* $NetBSD: bus.h,v 1.8 2019/09/23 16:17:55 skrll 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@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 #define PRIxBUSADDR "lx" 108 #define PRIxBUSSIZE "lx" 109 #define PRIuBUSSIZE "lu" 110 /* 111 * Access methods for bus space. 112 */ 113 typedef struct ews4800mips_bus_space *bus_space_tag_t; 114 typedef bus_addr_t bus_space_handle_t; 115 116 #define PRIxBSH PRIxBUSADDR 117 118 struct extent; /* forward declaration */ 119 120 struct ews4800mips_bus_space { 121 struct extent *ebs_extent; 122 bus_addr_t ebs_base_addr; 123 bus_size_t ebs_size; 124 125 /* cookie */ 126 void *ebs_cookie; 127 128 /* mapping/unmapping */ 129 int (*ebs_map)(void *, bus_addr_t, bus_size_t, 130 int, bus_space_handle_t *); 131 void (*ebs_unmap)(void *, bus_space_handle_t, 132 bus_size_t); 133 int (*ebs_subregion)(void *, bus_space_handle_t, 134 bus_size_t, bus_size_t, bus_space_handle_t *); 135 136 /* allocation/deallocation */ 137 int (*ebs_alloc)(void *, bus_addr_t, bus_addr_t, 138 bus_size_t, bus_size_t, bus_size_t, int, 139 bus_addr_t *, bus_space_handle_t *); 140 void (*ebs_free)(void *, bus_space_handle_t, 141 bus_size_t); 142 143 /* get kernel virtual address */ 144 void * (*ebs_vaddr)(void *, bus_space_handle_t); 145 146 /* read (single) */ 147 uint8_t (*ebs_r_1)(void *, bus_space_handle_t, 148 bus_size_t); 149 uint16_t (*ebs_r_2)(void *, bus_space_handle_t, 150 bus_size_t); 151 uint32_t (*ebs_r_4)(void *, bus_space_handle_t, 152 bus_size_t); 153 uint64_t (*ebs_r_8)(void *, bus_space_handle_t, 154 bus_size_t); 155 156 /* read multiple */ 157 void (*ebs_rm_1)(void *, bus_space_handle_t, 158 bus_size_t, uint8_t *, bus_size_t); 159 void (*ebs_rm_2)(void *, bus_space_handle_t, 160 bus_size_t, uint16_t *, bus_size_t); 161 void (*ebs_rm_4)(void *, bus_space_handle_t, 162 bus_size_t, uint32_t *, bus_size_t); 163 void (*ebs_rm_8)(void *, bus_space_handle_t, 164 bus_size_t, uint64_t *, bus_size_t); 165 166 /* read region */ 167 void (*ebs_rr_1)(void *, bus_space_handle_t, 168 bus_size_t, uint8_t *, bus_size_t); 169 void (*ebs_rr_2)(void *, bus_space_handle_t, 170 bus_size_t, uint16_t *, bus_size_t); 171 void (*ebs_rr_4)(void *, bus_space_handle_t, 172 bus_size_t, uint32_t *, bus_size_t); 173 void (*ebs_rr_8)(void *, bus_space_handle_t, 174 bus_size_t, uint64_t *, bus_size_t); 175 176 /* write (single) */ 177 void (*ebs_w_1)(void *, bus_space_handle_t, 178 bus_size_t, uint8_t); 179 void (*ebs_w_2)(void *, bus_space_handle_t, 180 bus_size_t, uint16_t); 181 void (*ebs_w_4)(void *, bus_space_handle_t, 182 bus_size_t, uint32_t); 183 void (*ebs_w_8)(void *, bus_space_handle_t, 184 bus_size_t, uint64_t); 185 186 /* write multiple */ 187 void (*ebs_wm_1)(void *, bus_space_handle_t, 188 bus_size_t, const uint8_t *, bus_size_t); 189 void (*ebs_wm_2)(void *, bus_space_handle_t, 190 bus_size_t, const uint16_t *, bus_size_t); 191 void (*ebs_wm_4)(void *, bus_space_handle_t, 192 bus_size_t, const uint32_t *, bus_size_t); 193 void (*ebs_wm_8)(void *, bus_space_handle_t, 194 bus_size_t, const uint64_t *, bus_size_t); 195 196 /* write region */ 197 void (*ebs_wr_1)(void *, bus_space_handle_t, 198 bus_size_t, const uint8_t *, bus_size_t); 199 void (*ebs_wr_2)(void *, bus_space_handle_t, 200 bus_size_t, const uint16_t *, bus_size_t); 201 void (*ebs_wr_4)(void *, bus_space_handle_t, 202 bus_size_t, const uint32_t *, bus_size_t); 203 void (*ebs_wr_8)(void *, bus_space_handle_t, 204 bus_size_t, const uint64_t *, bus_size_t); 205 206 /* set multiple */ 207 void (*ebs_sm_1)(void *, bus_space_handle_t, 208 bus_size_t, uint8_t, bus_size_t); 209 void (*ebs_sm_2)(void *, bus_space_handle_t, 210 bus_size_t, uint16_t, bus_size_t); 211 void (*ebs_sm_4)(void *, bus_space_handle_t, 212 bus_size_t, uint32_t, bus_size_t); 213 void (*ebs_sm_8)(void *, bus_space_handle_t, 214 bus_size_t, uint64_t, bus_size_t); 215 216 /* set region */ 217 void (*ebs_sr_1)(void *, bus_space_handle_t, 218 bus_size_t, uint8_t, bus_size_t); 219 void (*ebs_sr_2)(void *, bus_space_handle_t, 220 bus_size_t, uint16_t, bus_size_t); 221 void (*ebs_sr_4)(void *, bus_space_handle_t, 222 bus_size_t, uint32_t, bus_size_t); 223 void (*ebs_sr_8)(void *, bus_space_handle_t, 224 bus_size_t, uint64_t, bus_size_t); 225 226 /* copy */ 227 void (*ebs_c_1)(void *, bus_space_handle_t, bus_size_t, 228 bus_space_handle_t, bus_size_t, bus_size_t); 229 void (*ebs_c_2)(void *, bus_space_handle_t, bus_size_t, 230 bus_space_handle_t, bus_size_t, bus_size_t); 231 void (*ebs_c_4)(void *, bus_space_handle_t, bus_size_t, 232 bus_space_handle_t, bus_size_t, bus_size_t); 233 void (*ebs_c_8)(void *, bus_space_handle_t, bus_size_t, 234 bus_space_handle_t, bus_size_t, bus_size_t); 235 }; 236 237 #ifdef _KERNEL 238 #ifdef _EWS4800MIPS_BUS_SPACE_PRIVATE 239 240 #ifndef __read_1 241 #define __read_1(a) (*(volatile uint8_t *)(a)) 242 #endif 243 #ifndef __read_2 244 #define __read_2(a) (*(volatile uint16_t *)(a)) 245 #endif 246 #ifndef __read_4 247 #define __read_4(a) (*(volatile uint32_t *)(a)) 248 #endif 249 #ifndef __read_8 250 #define __read_8(a) (*(volatile uint64_t *)(a)) 251 #endif 252 #define __read_16(a) "error. not yet" 253 254 #ifndef __write_1 255 #define __write_1(a, v) { \ 256 *(volatile uint8_t *)(a) = (v); \ 257 wbflush(); \ 258 } 259 #endif 260 #ifndef __write_2 261 #define __write_2(a, v) { \ 262 *(volatile uint16_t *)(a) = (v); \ 263 wbflush(); \ 264 } 265 #endif 266 #ifndef __write_4 267 #define __write_4(a, v) { \ 268 *(volatile uint32_t *)(a) = (v); \ 269 wbflush(); \ 270 } 271 #endif 272 #ifndef __write_8 273 #define __write_8(a, v) { \ 274 *(volatile uint64_t *)(a) = (v); \ 275 wbflush(); \ 276 } 277 #endif 278 279 #define __TYPENAME(BITS) uint##BITS##_t 280 281 #define _BUS_SPACE_READ(PREFIX, BYTES, BITS) \ 282 static __TYPENAME(BITS) \ 283 PREFIX##_read_##BYTES(void *, bus_space_handle_t, bus_size_t); \ 284 static __TYPENAME(BITS) \ 285 PREFIX##_read_##BYTES(void *tag, bus_space_handle_t bsh, \ 286 bus_size_t offset) \ 287 { \ 288 return __read_##BYTES(VADDR(bsh, offset)); \ 289 } 290 291 #define _BUS_SPACE_READ_MULTI(PREFIX, BYTES, BITS) \ 292 static void \ 293 PREFIX##_read_multi_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 294 __TYPENAME(BITS) *, bus_size_t); \ 295 static void \ 296 PREFIX##_read_multi_##BYTES(void *tag, bus_space_handle_t bsh, \ 297 bus_size_t offset, __TYPENAME(BITS) *addr, bus_size_t count) \ 298 { \ 299 bus_addr_t a = VADDR(bsh, offset); \ 300 while (count--) \ 301 *addr++ = __read_##BYTES(a); \ 302 } 303 304 #define _BUS_SPACE_READ_REGION(PREFIX, BYTES, BITS) \ 305 static void \ 306 PREFIX##_read_region_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 307 __TYPENAME(BITS) *, bus_size_t); \ 308 static void \ 309 PREFIX##_read_region_##BYTES(void *tag, bus_space_handle_t bsh, \ 310 bus_size_t offset, __TYPENAME(BITS) *addr, bus_size_t count) \ 311 { \ 312 while (count--) { \ 313 *addr++ = __read_##BYTES(VADDR(bsh, offset)); \ 314 offset += BYTES; \ 315 } \ 316 } 317 318 #define _BUS_SPACE_WRITE(PREFIX, BYTES, BITS) \ 319 static void \ 320 PREFIX##_write_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 321 __TYPENAME(BITS)); \ 322 static void \ 323 PREFIX##_write_##BYTES(void *tag, bus_space_handle_t bsh, \ 324 bus_size_t offset, __TYPENAME(BITS) value) \ 325 { \ 326 __write_##BYTES(VADDR(bsh, offset), value); \ 327 } 328 329 #define _BUS_SPACE_WRITE_MULTI(PREFIX, BYTES, BITS) \ 330 static void \ 331 PREFIX##_write_multi_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 332 const __TYPENAME(BITS) *, bus_size_t); \ 333 static void \ 334 PREFIX##_write_multi_##BYTES(void *tag, bus_space_handle_t bsh, \ 335 bus_size_t offset, const __TYPENAME(BITS) *addr, bus_size_t count) \ 336 { \ 337 bus_addr_t a = VADDR(bsh, offset); \ 338 while (count--) { \ 339 __write_##BYTES(a, *addr++); \ 340 } \ 341 } 342 343 #define _BUS_SPACE_WRITE_REGION(PREFIX, BYTES, BITS) \ 344 static void \ 345 PREFIX##_write_region_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 346 const __TYPENAME(BITS) *, bus_size_t); \ 347 static void \ 348 PREFIX##_write_region_##BYTES(void *tag, bus_space_handle_t bsh, \ 349 bus_size_t offset, const __TYPENAME(BITS) *addr, bus_size_t count) \ 350 { \ 351 while (count--) { \ 352 __write_##BYTES(VADDR(bsh, offset), *addr++); \ 353 offset += BYTES; \ 354 } \ 355 } 356 357 #define _BUS_SPACE_SET_MULTI(PREFIX, BYTES, BITS) \ 358 static void \ 359 PREFIX##_set_multi_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 360 __TYPENAME(BITS), bus_size_t); \ 361 static void \ 362 PREFIX##_set_multi_##BYTES(void *tag, bus_space_handle_t bsh, \ 363 bus_size_t offset, __TYPENAME(BITS) value, bus_size_t count) \ 364 { \ 365 bus_addr_t a = VADDR(bsh, offset); \ 366 while (count--) { \ 367 __write_##BYTES(a, value); \ 368 } \ 369 } 370 371 #define _BUS_SPACE_SET_REGION(PREFIX, BYTES, BITS) \ 372 static void \ 373 PREFIX##_set_region_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 374 __TYPENAME(BITS), bus_size_t); \ 375 static void \ 376 PREFIX##_set_region_##BYTES(void *tag, bus_space_handle_t bsh, \ 377 bus_size_t offset, __TYPENAME(BITS) value, bus_size_t count) \ 378 { \ 379 while (count--) { \ 380 __write_##BYTES(VADDR(bsh, offset), value); \ 381 offset += BYTES; \ 382 } \ 383 } 384 385 #define _BUS_SPACE_COPY_REGION(PREFIX, BYTES, BITS) \ 386 static void \ 387 PREFIX##_copy_region_##BYTES(void *, bus_space_handle_t, bus_size_t, \ 388 bus_space_handle_t, bus_size_t, bus_size_t); \ 389 static void \ 390 PREFIX##_copy_region_##BYTES(void *t, bus_space_handle_t h1, \ 391 bus_size_t o1, bus_space_handle_t h2, bus_size_t o2, bus_size_t c) \ 392 { \ 393 bus_size_t o; \ 394 if ((h1 + o1) >= (h2 + o2)) { \ 395 /* src after dest: copy forward */ \ 396 for (o = 0; c != 0; c--, o += BYTES) \ 397 __write_##BYTES(VADDR(h2, o2 + o), \ 398 __read_##BYTES(VADDR(h1, o1 + o))); \ 399 } else { \ 400 /* dest after src: copy backwards */ \ 401 for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \ 402 __write_##BYTES(VADDR(h2, o2 + o), \ 403 __read_##BYTES(VADDR(h1, o1 + o))); \ 404 } \ 405 } 406 407 #define _BUS_SPACE_NO_MAP \ 408 (int (*)(void *, bus_addr_t, bus_size_t, int, \ 409 bus_space_handle_t *))_bus_space_invalid_access 410 #define _BUS_SPACE_NO_UNMAP \ 411 (void (*)(void *, bus_space_handle_t, bus_size_t)) \ 412 _bus_space_invalid_access 413 #define _BUS_SPACE_NO_SUBREGION \ 414 (int (*)(void *, bus_space_handle_t, bus_size_t, bus_size_t, \ 415 bus_space_handle_t *))_bus_space_invalid_access 416 #define _BUS_SPACE_NO_ALLOC \ 417 (int (*)(void *, bus_addr_t, bus_addr_t, bus_size_t, bus_size_t,\ 418 bus_size_t, int, bus_addr_t *, bus_space_handle_t *)) \ 419 _bus_space_invalid_access 420 #define _BUS_SPACE_NO_FREE \ 421 (void (*)(void *, bus_space_handle_t, bus_size_t)) \ 422 _bus_space_invalid_access 423 #define _BUS_SPACE_NO_VADDR \ 424 (void *(*)(void *, bus_space_handle_t))_bus_space_invalid_access 425 #define _BUS_SPACE_NO_READ(BYTES, BITS) \ 426 (uint##BITS##_t (*)(void *, bus_space_handle_t, bus_size_t)) \ 427 _bus_space_invalid_access 428 #define _BUS_SPACE_NO_READ_MULTI(BYTES, BITS) \ 429 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 430 uint##BITS##_t *, bus_size_t))_bus_space_invalid_access 431 #define _BUS_SPACE_NO_READ_REGION(BYTES, BITS) \ 432 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 433 uint##BITS##_t *, bus_size_t))_bus_space_invalid_access 434 #define _BUS_SPACE_NO_WRITE(BYTES, BITS) \ 435 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 436 uint##BITS##_t))_bus_space_invalid_access 437 #define _BUS_SPACE_NO_WRITE_MULTI(BYTES, BITS) \ 438 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 439 const uint##BITS##_t *, bus_size_t))_bus_space_invalid_access 440 #define _BUS_SPACE_NO_WRITE_REGION(BYTES, BITS) \ 441 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 442 const uint##BITS##_t *, bus_size_t))_bus_space_invalid_access 443 #define _BUS_SPACE_NO_SET_MULTI(BYTES, BITS) \ 444 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 445 uint##BITS##_t, bus_size_t))_bus_space_invalid_access 446 #define _BUS_SPACE_NO_SET_REGION(BYTES, BITS) \ 447 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 448 uint##BITS##_t, bus_size_t))_bus_space_invalid_access 449 #define _BUS_SPACE_NO_COPY_REGION(BYTES, BITS) \ 450 (void (*)(void *, bus_space_handle_t, bus_size_t, \ 451 bus_space_handle_t, bus_size_t, bus_size_t))_bus_space_invalid_access 452 453 void _bus_space_invalid_access(void); 454 #endif /* _EWS4800MIPS_BUS_SPACE_PRIVATE */ 455 456 #define __ebs_c(a,b) __CONCAT(a,b) 457 #define __ebs_opname(op,size) __ebs_c(__ebs_c(__ebs_c(ebs_,op),_),size) 458 459 #define __ebs_rs(sz, tn, t, h, o) \ 460 (__BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"), \ 461 (*(t)->__ebs_opname(r,sz))((t)->ebs_cookie, h, o)) 462 463 #define __ebs_ws(sz, tn, t, h, o, v) \ 464 ({ \ 465 __BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"); \ 466 (*(t)->__ebs_opname(w,sz))((t)->ebs_cookie, h, o, v); \ 467 }) 468 469 #define __ebs_nonsingle(type, sz, tn, t, h, o, a, c) \ 470 ({ \ 471 __BUS_SPACE_ADDRESS_SANITY((a), tn, "buffer"); \ 472 __BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"); \ 473 (*(t)->__ebs_opname(type,sz))((t)->ebs_cookie, h, o, a, c); \ 474 }) 475 476 #define __ebs_set(type, sz, tn, t, h, o, v, c) \ 477 ({ \ 478 __BUS_SPACE_ADDRESS_SANITY((h) + (o), tn, "bus addr"); \ 479 (*(t)->__ebs_opname(type,sz))((t)->ebs_cookie, h, o, v, c); \ 480 }) 481 482 #define __ebs_copy(sz, tn, t, h1, o1, h2, o2, cnt) \ 483 ({ \ 484 __BUS_SPACE_ADDRESS_SANITY((h1) + (o1), tn, "bus addr 1"); \ 485 __BUS_SPACE_ADDRESS_SANITY((h2) + (o2), tn, "bus addr 2"); \ 486 (*(t)->__ebs_opname(c,sz))((t)->ebs_cookie, h1, o1, h2, o2, cnt); \ 487 }) 488 489 /* 490 * Create/destroy default bus_space tag. 491 */ 492 int bus_space_create(bus_space_tag_t, const char *, bus_addr_t, bus_size_t); 493 void bus_space_destroy(bus_space_tag_t); 494 495 /* 496 * Mapping and unmapping operations. 497 */ 498 #define bus_space_map(t, a, s, f, hp) \ 499 (*(t)->ebs_map)((t)->ebs_cookie, (a), (s), (f), (hp)) 500 #define bus_space_unmap(t, h, s) \ 501 (*(t)->ebs_unmap)((t)->ebs_cookie, (h), (s)) 502 #define bus_space_subregion(t, h, o, s, hp) \ 503 (*(t)->ebs_subregion)((t)->ebs_cookie, (h), (o), (s), (hp)) 504 505 #endif /* _KERNEL */ 506 507 #define BUS_SPACE_MAP_CACHEABLE 0x01 508 #define BUS_SPACE_MAP_LINEAR 0x02 509 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 510 511 #ifdef _KERNEL 512 /* 513 * Allocation and deallocation operations. 514 */ 515 #define bus_space_alloc(t, rs, re, s, a, b, f, ap, hp) \ 516 (*(t)->ebs_alloc)((t)->ebs_cookie, (rs), (re), (s), (a), (b), \ 517 (f), (ap), (hp)) 518 #define bus_space_free(t, h, s) \ 519 (*(t)->ebs_free)((t)->ebs_cookie, (h), (s)) 520 521 /* 522 * Get kernel virtual address for ranges mapped BUS_SPACE_MAP_LINEAR. 523 */ 524 #define bus_space_vaddr(t, h) \ 525 (*(t)->ebs_vaddr)((t)->ebs_cookie, (h)) 526 527 /* 528 * Bus read/write barrier methods. 529 * 530 * void bus_space_barrier(bus_space_tag_t tag, 531 * bus_space_handle_t bsh, bus_size_t offset, 532 * bus_size_t len, int flags); 533 * 534 * On the MIPS, we just flush the write buffer. 535 */ 536 #define bus_space_barrier(t, h, o, l, f) \ 537 ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f), \ 538 wbflush())) 539 #define BUS_SPACE_BARRIER_READ 0x01 540 #define BUS_SPACE_BARRIER_WRITE 0x02 541 542 543 /* 544 * Bus read (single) operations. 545 */ 546 #define bus_space_read_1(t, h, o) __ebs_rs(1,uint8_t,(t),(h),(o)) 547 #define bus_space_read_2(t, h, o) __ebs_rs(2,uint16_t,(t),(h),(o)) 548 #define bus_space_read_4(t, h, o) __ebs_rs(4,uint32_t,(t),(h),(o)) 549 #define bus_space_read_8(t, h, o) __ebs_rs(8,uint64_t,(t),(h),(o)) 550 551 552 /* 553 * Bus read multiple operations. 554 */ 555 #define bus_space_read_multi_1(t, h, o, a, c) \ 556 __ebs_nonsingle(rm,1,uint8_t,(t),(h),(o),(a),(c)) 557 #define bus_space_read_multi_2(t, h, o, a, c) \ 558 __ebs_nonsingle(rm,2,uint16_t,(t),(h),(o),(a),(c)) 559 #define bus_space_read_multi_4(t, h, o, a, c) \ 560 __ebs_nonsingle(rm,4,uint32_t,(t),(h),(o),(a),(c)) 561 #define bus_space_read_multi_8(t, h, o, a, c) \ 562 __ebs_nonsingle(rm,8,uint64_t,(t),(h),(o),(a),(c)) 563 564 565 /* 566 * Bus read region operations. 567 */ 568 #define bus_space_read_region_1(t, h, o, a, c) \ 569 __ebs_nonsingle(rr,1,uint8_t,(t),(h),(o),(a),(c)) 570 #define bus_space_read_region_2(t, h, o, a, c) \ 571 __ebs_nonsingle(rr,2,uint16_t,(t),(h),(o),(a),(c)) 572 #define bus_space_read_region_4(t, h, o, a, c) \ 573 __ebs_nonsingle(rr,4,uint32_t,(t),(h),(o),(a),(c)) 574 #define bus_space_read_region_8(t, h, o, a, c) \ 575 __ebs_nonsingle(rr,8,uint64_t,(t),(h),(o),(a),(c)) 576 577 578 /* 579 * Bus write (single) operations. 580 */ 581 #define bus_space_write_1(t, h, o, v) __ebs_ws(1,uint8_t,(t),(h),(o),(v)) 582 #define bus_space_write_2(t, h, o, v) __ebs_ws(2,uint16_t,(t),(h),(o),(v)) 583 #define bus_space_write_4(t, h, o, v) __ebs_ws(4,uint32_t,(t),(h),(o),(v)) 584 #define bus_space_write_8(t, h, o, v) __ebs_ws(8,uint64_t,(t),(h),(o),(v)) 585 586 587 /* 588 * Bus write multiple operations. 589 */ 590 #define bus_space_write_multi_1(t, h, o, a, c) \ 591 __ebs_nonsingle(wm,1,uint8_t,(t),(h),(o),(a),(c)) 592 #define bus_space_write_multi_2(t, h, o, a, c) \ 593 __ebs_nonsingle(wm,2,uint16_t,(t),(h),(o),(a),(c)) 594 #define bus_space_write_multi_4(t, h, o, a, c) \ 595 __ebs_nonsingle(wm,4,uint32_t,(t),(h),(o),(a),(c)) 596 #define bus_space_write_multi_8(t, h, o, a, c) \ 597 __ebs_nonsingle(wm,8,uint64_t,(t),(h),(o),(a),(c)) 598 599 600 /* 601 * Bus write region operations. 602 */ 603 #define bus_space_write_region_1(t, h, o, a, c) \ 604 __ebs_nonsingle(wr,1,uint8_t,(t),(h),(o),(a),(c)) 605 #define bus_space_write_region_2(t, h, o, a, c) \ 606 __ebs_nonsingle(wr,2,uint16_t,(t),(h),(o),(a),(c)) 607 #define bus_space_write_region_4(t, h, o, a, c) \ 608 __ebs_nonsingle(wr,4,uint32_t,(t),(h),(o),(a),(c)) 609 #define bus_space_write_region_8(t, h, o, a, c) \ 610 __ebs_nonsingle(wr,8,uint64_t,(t),(h),(o),(a),(c)) 611 612 613 /* 614 * Set multiple operations. 615 */ 616 #define bus_space_set_multi_1(t, h, o, v, c) \ 617 __ebs_set(sm,1,uint8_t,(t),(h),(o),(v),(c)) 618 #define bus_space_set_multi_2(t, h, o, v, c) \ 619 __ebs_set(sm,2,uint16_t,(t),(h),(o),(v),(c)) 620 #define bus_space_set_multi_4(t, h, o, v, c) \ 621 __ebs_set(sm,4,uint32_t,(t),(h),(o),(v),(c)) 622 #define bus_space_set_multi_8(t, h, o, v, c) \ 623 __ebs_set(sm,8,uint64_t,(t),(h),(o),(v),(c)) 624 625 626 /* 627 * Set region operations. 628 */ 629 #define bus_space_set_region_1(t, h, o, v, c) \ 630 __ebs_set(sr,1,uint8_t,(t),(h),(o),(v),(c)) 631 #define bus_space_set_region_2(t, h, o, v, c) \ 632 __ebs_set(sr,2,uint16_t,(t),(h),(o),(v),(c)) 633 #define bus_space_set_region_4(t, h, o, v, c) \ 634 __ebs_set(sr,4,uint32_t,(t),(h),(o),(v),(c)) 635 #define bus_space_set_region_8(t, h, o, v, c) \ 636 __ebs_set(sr,8,uint64_t,(t),(h),(o),(v),(c)) 637 638 639 /* 640 * Copy region operations. 641 */ 642 #define bus_space_copy_region_1(t, h1, o1, h2, o2, c) \ 643 __ebs_copy(1, uint8_t, (t), (h1), (o1), (h2), (o2), (c)) 644 #define bus_space_copy_region_2(t, h1, o1, h2, o2, c) \ 645 __ebs_copy(2, uint16_t, (t), (h1), (o1), (h2), (o2), (c)) 646 #define bus_space_copy_region_4(t, h1, o1, h2, o2, c) \ 647 __ebs_copy(4, uint32_t, (t), (h1), (o1), (h2), (o2), (c)) 648 #define bus_space_copy_region_8(t, h1, o1, h2, o2, c) \ 649 __ebs_copy(8, uint64_t, (t), (h1), (o1), (h2), (o2), (c)) 650 651 /* 652 * Bus stream operations--defined in terms of non-stream counterparts 653 */ 654 #define __BUS_SPACE_HAS_STREAM_METHODS 1 655 #define bus_space_read_stream_1 bus_space_read_1 656 #define bus_space_read_stream_2 bus_space_read_2 657 #define bus_space_read_stream_4 bus_space_read_4 658 #define bus_space_read_stream_8 bus_space_read_8 659 #define bus_space_read_multi_stream_1 bus_space_read_multi_1 660 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 661 #define bus_space_read_multi_stream_4 bus_space_read_multi_4 662 #define bus_space_read_multi_stream_8 bus_space_read_multi_8 663 #define bus_space_read_region_stream_1 bus_space_read_region_1 664 #define bus_space_read_region_stream_2 bus_space_read_region_2 665 #define bus_space_read_region_stream_4 bus_space_read_region_4 666 #define bus_space_read_region_stream_8 bus_space_read_region_8 667 #define bus_space_write_stream_1 bus_space_write_1 668 #define bus_space_write_stream_2 bus_space_write_2 669 #define bus_space_write_stream_4 bus_space_write_4 670 #define bus_space_write_stream_8 bus_space_write_8 671 #define bus_space_write_multi_stream_1 bus_space_write_multi_1 672 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 673 #define bus_space_write_multi_stream_4 bus_space_write_multi_4 674 #define bus_space_write_multi_stream_8 bus_space_write_multi_8 675 #define bus_space_write_region_stream_1 bus_space_write_region_1 676 #define bus_space_write_region_stream_2 bus_space_write_region_2 677 #define bus_space_write_region_stream_4 bus_space_write_region_4 678 #define bus_space_write_region_stream_8 bus_space_write_region_8 679 680 #endif /* _KERNEL */ 681 682 /* 683 * Flags used in various bus DMA methods. 684 */ 685 #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */ 686 #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */ 687 #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */ 688 #define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */ 689 #define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */ 690 #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */ 691 #define BUS_DMA_BUS2 0x020 692 #define BUS_DMA_BUS3 0x040 693 #define BUS_DMA_BUS4 0x080 694 #define BUS_DMA_READ 0x100 /* mapping is device -> memory only */ 695 #define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */ 696 #define BUS_DMA_NOCACHE 0x400 /* hint: map non-cached memory */ 697 698 #define EWS4800MIPS_DMAMAP_COHERENT 0x10000 /* no cache flush necessary on sync */ 699 700 /* Forwards needed by prototypes below. */ 701 struct mbuf; 702 struct uio; 703 704 /* 705 * Operations performed by bus_dmamap_sync(). 706 */ 707 #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ 708 #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ 709 #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ 710 #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ 711 712 typedef struct ews4800mips_bus_dma_tag *bus_dma_tag_t; 713 typedef struct ews4800mips_bus_dmamap *bus_dmamap_t; 714 715 #define BUS_DMA_TAG_VALID(t) ((t) != (bus_dma_tag_t)0) 716 717 /* 718 * bus_dma_segment_t 719 * 720 * Describes a single contiguous DMA transaction. Values 721 * are suitable for programming into DMA registers. 722 */ 723 struct ews4800mips_bus_dma_segment { 724 bus_addr_t ds_addr; /* DMA address */ 725 bus_size_t ds_len; /* length of transfer */ 726 vaddr_t _ds_vaddr; /* virtual address, 0 if invalid */ 727 }; 728 typedef struct ews4800mips_bus_dma_segment bus_dma_segment_t; 729 730 /* 731 * bus_dma_tag_t 732 * 733 * A machine-dependent opaque type describing the implementation of 734 * DMA for a given bus. 735 */ 736 737 struct ews4800mips_bus_dma_tag { 738 /* 739 * DMA mapping methods. 740 */ 741 int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int, 742 bus_size_t, bus_size_t, int, bus_dmamap_t *); 743 void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t); 744 int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *, 745 bus_size_t, struct proc *, int); 746 int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t, 747 struct mbuf *, int); 748 int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t, 749 struct uio *, int); 750 int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t, 751 bus_dma_segment_t *, int, bus_size_t, int); 752 void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t); 753 void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t, 754 bus_addr_t, bus_size_t, int); 755 756 /* 757 * DMA memory utility functions. 758 */ 759 int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t, 760 bus_size_t, bus_dma_segment_t *, int, int *, int); 761 void (*_dmamem_free)(bus_dma_tag_t, 762 bus_dma_segment_t *, int); 763 int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *, 764 int, size_t, void **, int); 765 void (*_dmamem_unmap)(bus_dma_tag_t, void *, size_t); 766 paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *, 767 int, off_t, int, int); 768 769 /* 770 * DMA controller private. 771 */ 772 void *_dmachip_cookie; 773 }; 774 775 #define bus_dmamap_create(t, s, n, m, b, f, p) \ 776 (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) 777 #define bus_dmamap_destroy(t, p) \ 778 (*(t)->_dmamap_destroy)((t), (p)) 779 #define bus_dmamap_load(t, m, b, s, p, f) \ 780 (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) 781 #define bus_dmamap_load_mbuf(t, m, b, f) \ 782 (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) 783 #define bus_dmamap_load_uio(t, m, u, f) \ 784 (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) 785 #define bus_dmamap_load_raw(t, m, sg, n, s, f) \ 786 (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) 787 #define bus_dmamap_unload(t, p) \ 788 (*(t)->_dmamap_unload)((t), (p)) 789 #define bus_dmamap_sync(t, p, o, l, ops) \ 790 (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops)) 791 792 #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ 793 (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) 794 #define bus_dmamem_free(t, sg, n) \ 795 (*(t)->_dmamem_free)((t), (sg), (n)) 796 #define bus_dmamem_map(t, sg, n, s, k, f) \ 797 (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) 798 #define bus_dmamem_unmap(t, k, s) \ 799 (*(t)->_dmamem_unmap)((t), (k), (s)) 800 #define bus_dmamem_mmap(t, sg, n, o, p, f) \ 801 (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) 802 803 #define bus_dmatag_subregion(t, mna, mxa, nt, f) EOPNOTSUPP 804 #define bus_dmatag_destroy(t) 805 806 /* 807 * bus_dmamap_t 808 * 809 * Describes a DMA mapping. 810 */ 811 struct ews4800mips_bus_dmamap { 812 /* 813 * PRIVATE MEMBERS: not for use my machine-independent code. 814 */ 815 bus_size_t _dm_size; /* largest DMA transfer mappable */ 816 int _dm_segcnt; /* number of segs this map can map */ 817 bus_size_t _dm_maxmaxsegsz; /* fixed largest possible segment */ 818 bus_size_t _dm_boundary; /* don't cross this */ 819 int _dm_flags; /* misc. flags */ 820 struct vmspace *_dm_vmspace; /* vmspace that owns the mapping */ 821 822 /* 823 * PUBLIC MEMBERS: these are used by machine-independent code. 824 */ 825 bus_size_t dm_maxsegsz; /* largest possible segment */ 826 bus_size_t dm_mapsize; /* size of the mapping */ 827 int dm_nsegs; /* # valid segments in mapping */ 828 bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 829 }; 830 831 #ifdef _EWS4800MIPS_BUS_DMA_PRIVATE 832 int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t, 833 bus_size_t, int, bus_dmamap_t *); 834 void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); 835 int _bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, 836 bus_size_t, struct proc *, int); 837 int _bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, 838 struct mbuf *, int); 839 int _bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, 840 struct uio *, int); 841 int _bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, 842 bus_dma_segment_t *, int, bus_size_t, int); 843 void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); 844 void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 845 bus_size_t, int); 846 847 int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size, 848 bus_size_t alignment, bus_size_t boundary, 849 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags); 850 void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs, 851 int nsegs); 852 int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs, 853 int nsegs, size_t size, void **kvap, int flags); 854 void _bus_dmamem_unmap(bus_dma_tag_t tag, void *kva, 855 size_t size); 856 paddr_t _bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs, 857 int nsegs, off_t off, int prot, int flags); 858 859 int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size, 860 bus_size_t alignment, bus_size_t boundary, 861 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, 862 vaddr_t low, vaddr_t high); 863 864 extern struct ews4800mips_bus_dma_tag ews4800mips_default_bus_dma_tag; 865 #endif /* _EWS4800MIPS_BUS_DMA_PRIVATE */ 866 867 #endif /* _EWS4800MIPS_BUS_H_ */ 868