bus.h revision 1.3
1 /* $NetBSD: bus.h,v 1.3 2000/09/04 22:18:58 wdk Exp $ */ 2 /*- 3 * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 8 * NASA Ames Research Center. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1997 Per Fogelstrom. All rights reserved. 41 * Copyright (c) 1996 Niklas Hallqvist. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Christopher G. Demetriou 54 * for the NetBSD Project. 55 * 4. The name of the author may not be used to endorse or promote products 56 * derived from this software without specific prior written permission 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 61 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 62 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 64 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 67 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70 #ifndef _MIPSCO_BUS_H_ 71 #define _MIPSCO_BUS_H_ 72 #ifdef _KERNEL 73 74 #include <mips/locore.h> 75 76 #ifdef BUS_SPACE_DEBUG 77 #include <sys/systm.h> /* for printf() prototype */ 78 /* 79 * Macros for checking the aligned-ness of pointers passed to bus 80 * space ops. Strict alignment is required by the MIPS architecture, 81 * and a trap will occur if unaligned access is performed. These 82 * may aid in the debugging of a broken device driver by displaying 83 * useful information about the problem. 84 */ 85 #define __BUS_SPACE_ALIGNED_ADDRESS(p, t) \ 86 ((((u_long)(p)) & (sizeof(t)-1)) == 0) 87 88 #define __BUS_SPACE_ADDRESS_SANITY(p, t, d) \ 89 ({ \ 90 if (__BUS_SPACE_ALIGNED_ADDRESS((p), t) == 0) { \ 91 printf("%s 0x%lx not aligned to %d bytes %s:%d\n", \ 92 d, (u_long)(p), sizeof(t), __FILE__, __LINE__); \ 93 } \ 94 (void) 0; \ 95 }) 96 97 #define BUS_SPACE_ALIGNED_POINTER(p, t) __BUS_SPACE_ALIGNED_ADDRESS(p, t) 98 #else 99 #define __BUS_SPACE_ADDRESS_SANITY(p,t,d) (void) 0 100 #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) 101 #endif /* BUS_SPACE_DEBUG */ 102 103 /* 104 * Utility macro; do not use outside this file. 105 */ 106 #ifdef __STDC__ 107 #define __CONCAT3(a,b,c) a##b##c 108 #else 109 #define __CONCAT3(a,b,c) a/**/b/**/c 110 #endif 111 112 /* 113 * Bus address and size types 114 */ 115 typedef u_long bus_addr_t; 116 typedef u_long bus_size_t; 117 118 /* 119 * Access methods for bus resources and address space. 120 */ 121 typedef u_int32_t bus_space_handle_t; 122 typedef struct mipsco_bus_space *bus_space_tag_t; 123 124 struct mipsco_bus_space { 125 const char *bs_name; 126 struct extent *bs_extent; 127 bus_addr_t bs_start; 128 bus_size_t bs_size; 129 130 paddr_t bs_pbase; 131 vaddr_t bs_vbase; 132 133 /* sparse addressing shift count */ 134 u_int8_t bs_stride_1; 135 u_int8_t bs_stride_2; 136 u_int8_t bs_stride_4; 137 u_int8_t bs_stride_8; 138 139 /* compose a bus_space handle from tag/handle/addr/size/flags (MD) */ 140 int (*bs_compose_handle) __P((bus_space_tag_t, bus_addr_t, 141 bus_size_t, int, bus_space_handle_t *)); 142 143 /* dispose a bus_space handle (MD) */ 144 int (*bs_dispose_handle) __P((bus_space_tag_t, bus_space_handle_t, 145 bus_size_t)); 146 147 /* convert bus_space tag/handle to physical address (MD) */ 148 int (*bs_paddr) __P((bus_space_tag_t, bus_space_handle_t, 149 paddr_t *)); 150 151 /* mapping/unmapping */ 152 int (*bs_map) __P((bus_space_tag_t, bus_addr_t, bus_size_t, int, 153 bus_space_handle_t *)); 154 void (*bs_unmap) __P((bus_space_tag_t, bus_space_handle_t, 155 bus_size_t)); 156 int (*bs_subregion) __P((bus_space_tag_t, bus_space_handle_t, 157 bus_size_t, bus_size_t, bus_space_handle_t *)); 158 159 /* allocation/deallocation */ 160 int (*bs_alloc) __P((bus_space_tag_t, bus_addr_t, bus_addr_t, 161 bus_size_t, bus_size_t, bus_size_t, int, 162 bus_addr_t *, bus_space_handle_t *)); 163 void (*bs_free) __P((bus_space_tag_t, bus_space_handle_t, 164 bus_size_t)); 165 166 /* interrupt attach */ 167 void (*bs_intr_establish) __P(( 168 bus_space_tag_t, 169 int, /*bus-specific intr*/ 170 int, /*priority/class*/ 171 int, /*flags*/ 172 int (*) __P((void *)), /*handler*/ 173 void *)); /*handler arg*/ 174 175 void *bs_aux; 176 }; 177 178 /* vaddr_t argument of mipsco_bus_space_init() */ 179 #define MIPSCO_BUS_SPACE_UNMAPPED ((vaddr_t)0) 180 181 /* machine dependent utility function for bus_space users */ 182 void mipsco_bus_space_malloc_set_safe __P((void)); 183 void mipsco_bus_space_init __P((bus_space_tag_t, const char *, 184 paddr_t, vaddr_t, bus_addr_t, bus_size_t)); 185 void mipsco_bus_space_init_extent __P((bus_space_tag_t, caddr_t, size_t)); 186 void mipsco_bus_space_set_aligned_stride __P((bus_space_tag_t, unsigned int)); 187 void mipsco_sparse_bus_space_init __P((bus_space_tag_t, const char *, 188 paddr_t, bus_addr_t, bus_size_t)); 189 void mipsco_large_bus_space_init __P((bus_space_tag_t, const char *, 190 paddr_t, bus_addr_t, bus_size_t)); 191 192 /* machine dependent utility function for bus_space implementations */ 193 int mipsco_bus_space_extent_malloc_flag __P((void)); 194 195 /* these are provided for subclasses which override base bus_space. */ 196 197 int mipsco_bus_space_compose_handle __P((bus_space_tag_t, 198 bus_addr_t, bus_size_t, int, bus_space_handle_t *)); 199 int mipsco_bus_space_dispose_handle __P((bus_space_tag_t, 200 bus_space_handle_t, bus_size_t)); 201 int mipsco_bus_space_paddr __P((bus_space_tag_t, 202 bus_space_handle_t, paddr_t *)); 203 204 int mipsco_sparse_bus_space_compose_handle __P((bus_space_tag_t, 205 bus_addr_t, bus_size_t, int, bus_space_handle_t *)); 206 int mipsco_sparse_bus_space_dispose_handle __P((bus_space_tag_t, 207 bus_space_handle_t, bus_size_t)); 208 int mipsco_sparse_bus_space_paddr __P((bus_space_tag_t, 209 bus_space_handle_t, paddr_t *)); 210 211 int mipsco_bus_space_map __P((bus_space_tag_t, bus_addr_t, bus_size_t, int, 212 bus_space_handle_t *)); 213 void mipsco_bus_space_unmap __P((bus_space_tag_t, bus_space_handle_t, 214 bus_size_t)); 215 int mipsco_bus_space_subregion __P((bus_space_tag_t, bus_space_handle_t, 216 bus_size_t, bus_size_t, bus_space_handle_t *)); 217 int mipsco_bus_space_alloc __P((bus_space_tag_t, bus_addr_t, bus_addr_t, 218 bus_size_t, bus_size_t, bus_size_t, int, bus_addr_t *, 219 bus_space_handle_t *)); 220 #define mipsco_bus_space_free mipsco_bus_space_unmap 221 222 /* 223 * int bus_space_compose_handle __P((bus_space_tag_t t, bus_addr_t addr, 224 * bus_size_t size, int flags, bus_space_handle_t *bshp)); 225 * 226 * MACHINE DEPENDENT, NOT PORTABLE INTERFACE: 227 * Compose a bus_space handle from tag/handle/addr/size/flags. 228 * A helper function for bus_space_map()/bus_space_alloc() implementation. 229 */ 230 #define bus_space_compose_handle(bst, addr, size, flags, bshp) \ 231 (*(bst)->bs_compose_handle)(bst, addr, size, flags, bshp) 232 233 /* 234 * int bus_space_dispose_handle __P((bus_space_tag_t t, bus_addr_t addr, 235 * bus_space_handle_t bsh, bus_size_t size)); 236 * 237 * MACHINE DEPENDENT, NOT PORTABLE INTERFACE: 238 * Dispose a bus_space handle. 239 * A helper function for bus_space_unmap()/bus_space_free() implementation. 240 */ 241 #define bus_space_dispose_handle(bst, bsh, size) \ 242 (*(bst)->bs_dispose_handle)(bst, bsh, size) 243 244 /* 245 * int bus_space_paddr __P((bus_space_tag_t tag, 246 * bus_space_handle_t bsh, paddr_t *pap)); 247 * 248 * MACHINE DEPENDENT, NOT PORTABLE INTERFACE: 249 * (cannot be implemented on e.g. I/O space on i386, non-linear space on alpha) 250 * Return physical address of a region. 251 * A helper function for device mmap entry. 252 */ 253 #define bus_space_paddr(bst, bsh, pap) \ 254 (*(bst)->bs_paddr)(bst, bsh, pap) 255 256 /* 257 * void *bus_space_vaddr __P((bus_space_tag_t, bus_space_handle_t)); 258 * 259 * Get the kernel virtual address for the mapped bus space. 260 * Only allowed for regions mapped with BUS_SPACE_MAP_LINEAR. 261 * (XXX not enforced) 262 */ 263 #define bus_space_vaddr(bst, bsh) \ 264 ((void *)(bsh)) 265 266 /* 267 * int bus_space_map __P((bus_space_tag_t t, bus_addr_t addr, 268 * bus_size_t size, int flags, bus_space_handle_t *bshp)); 269 * 270 * Map a region of bus space. 271 */ 272 273 #define BUS_SPACE_MAP_CACHEABLE 0x01 274 #define BUS_SPACE_MAP_LINEAR 0x02 275 #define BUS_SPACE_MAP_PREFETCHABLE 0x04 276 277 #define bus_space_map(t, a, s, f, hp) \ 278 (*(t)->bs_map)((t), (a), (s), (f), (hp)) 279 280 /* 281 * void bus_space_unmap __P((bus_space_tag_t t, 282 * bus_space_handle_t bsh, bus_size_t size)); 283 * 284 * Unmap a region of bus space. 285 */ 286 287 #define bus_space_unmap(t, h, s) \ 288 (*(t)->bs_unmap)((t), (h), (s)) 289 290 /* 291 * int bus_space_subregion __P((bus_space_tag_t t, 292 * bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, 293 * bus_space_handle_t *nbshp)); 294 * 295 * Get a new handle for a subregion of an already-mapped area of bus space. 296 */ 297 298 #define bus_space_subregion(t, h, o, s, hp) \ 299 (*(t)->bs_subregion)((t), (h), (o), (s), (hp)) 300 301 /* 302 * int bus_space_alloc __P((bus_space_tag_t t, bus_addr_t, rstart, 303 * bus_addr_t rend, bus_size_t size, bus_size_t align, 304 * bus_size_t boundary, int flags, bus_addr_t *addrp, 305 * bus_space_handle_t *bshp)); 306 * 307 * Allocate a region of bus space. 308 */ 309 310 #define bus_space_alloc(t, rs, re, s, a, b, f, ap, hp) \ 311 (*(t)->bs_alloc)((t), (rs), (re), (s), (a), (b), (f), (ap), (hp)) 312 313 /* 314 * int bus_space_free __P((bus_space_tag_t t, 315 * bus_space_handle_t bsh, bus_size_t size)); 316 * 317 * Free a region of bus space. 318 */ 319 320 #define bus_space_free(t, h, s) \ 321 (*(t)->bs_free)((t), (h), (s)) 322 323 /* 324 * void bus_intr_establish __P((bus_space_tag_t bst, 325 * int level, int pri, int flags, int (*func) __P((void *)) 326 * void *arg)); 327 * 328 * Attach interrupt handler and softc argument 329 */ 330 331 #define bus_intr_establish(t, i, c, f, ihf, iha) \ 332 (*(t)->bs_intr_establish)((t), (i), (c), (f), (ihf), (iha)) 333 334 /* 335 * u_intN_t bus_space_read_N __P((bus_space_tag_t tag, 336 * bus_space_handle_t bsh, bus_size_t offset)); 337 * 338 * Read a 1, 2, 4, or 8 byte quantity from bus space 339 * described by tag/handle/offset. 340 */ 341 342 #define bus_space_read(BYTES,BITS) \ 343 static __inline __CONCAT3(u_int,BITS,_t) \ 344 __CONCAT(bus_space_read_,BYTES)(bus_space_tag_t bst, \ 345 bus_space_handle_t bsh, bus_size_t offset) \ 346 { \ 347 return (*(volatile __CONCAT3(u_int,BITS,_t) *) \ 348 (bsh + (offset << __CONCAT(bst->bs_stride_,BYTES)))); \ 349 } 350 351 bus_space_read(1,8) 352 bus_space_read(2,16) 353 bus_space_read(4,32) 354 bus_space_read(8,64) 355 356 /* 357 * void bus_space_read_multi_N __P((bus_space_tag_t tag, 358 * bus_space_handle_t bsh, bus_size_t offset, 359 * u_intN_t *addr, size_t count)); 360 * 361 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 362 * described by tag/handle/offset and copy into buffer provided. 363 */ 364 365 #define bus_space_read_multi(BYTES,BITS) \ 366 static __inline void \ 367 __CONCAT(bus_space_read_multi_,BYTES)(bus_space_tag_t bst, \ 368 bus_space_handle_t bsh, bus_size_t offset, \ 369 __CONCAT3(u_int,BITS,_t) *datap, bus_size_t count) \ 370 { \ 371 volatile __CONCAT3(u_int,BITS,_t) *p = \ 372 (volatile __CONCAT3(u_int,BITS,_t) *) \ 373 (bsh + (offset << __CONCAT(bst->bs_stride_,BYTES))); \ 374 \ 375 for (; count > 0; --count) \ 376 *datap++ = *p; \ 377 } 378 379 bus_space_read_multi(1,8) 380 bus_space_read_multi(2,16) 381 bus_space_read_multi(4,32) 382 bus_space_read_multi(8,64) 383 384 /* 385 * void bus_space_read_region_N __P((bus_space_tag_t tag, 386 * bus_space_handle_t bsh, bus_size_t offset, 387 * u_intN_t *addr, size_t count)); 388 * 389 * Read `count' 1, 2, 4, or 8 byte quantities from bus space 390 * described by tag/handle and starting at `offset' and copy into 391 * buffer provided. 392 */ 393 394 #define bus_space_read_region(BYTES,BITS) \ 395 static __inline void \ 396 __CONCAT(bus_space_read_region_,BYTES)(bus_space_tag_t bst, \ 397 bus_space_handle_t bsh, bus_size_t offset, \ 398 __CONCAT3(u_int,BITS,_t) *datap, bus_size_t count) \ 399 { \ 400 int stride = 1 << __CONCAT(bst->bs_stride_,BYTES); \ 401 volatile __CONCAT3(u_int,BITS,_t) *p = \ 402 (volatile __CONCAT3(u_int,BITS,_t) *) \ 403 (bsh + (offset << __CONCAT(bst->bs_stride_,BYTES))); \ 404 \ 405 for (; count > 0; --count) { \ 406 *datap++ = *p; \ 407 p += stride; \ 408 } \ 409 } 410 411 bus_space_read_region(1,8) 412 bus_space_read_region(2,16) 413 bus_space_read_region(4,32) 414 bus_space_read_region(8,64) 415 416 /* 417 * void bus_space_write_N __P((bus_space_tag_t tag, 418 * bus_space_handle_t bsh, bus_size_t offset, 419 * u_intN_t value)); 420 * 421 * Write the 1, 2, 4, or 8 byte value `value' to bus space 422 * described by tag/handle/offset. 423 */ 424 425 #define bus_space_write(BYTES,BITS) \ 426 static __inline void \ 427 __CONCAT(bus_space_write_,BYTES)(bus_space_tag_t bst, \ 428 bus_space_handle_t bsh, \ 429 bus_size_t offset, __CONCAT3(u_int,BITS,_t) data) \ 430 { \ 431 *(volatile __CONCAT3(u_int,BITS,_t) *) \ 432 (bsh + (offset << __CONCAT(bst->bs_stride_,BYTES))) = data; \ 433 wbflush(); \ 434 } 435 436 bus_space_write(1,8) 437 bus_space_write(2,16) 438 bus_space_write(4,32) 439 bus_space_write(8,64) 440 441 /* 442 * void bus_space_write_multi_N __P((bus_space_tag_t tag, 443 * bus_space_handle_t bsh, bus_size_t offset, 444 * const u_intN_t *addr, size_t count)); 445 * 446 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer 447 * provided to bus space described by tag/handle/offset. 448 */ 449 450 #define bus_space_write_multi(BYTES,BITS) \ 451 static __inline void \ 452 __CONCAT(bus_space_write_multi_,BYTES)(bus_space_tag_t bst, \ 453 bus_space_handle_t bsh, bus_size_t offset, \ 454 const __CONCAT3(u_int,BITS,_t) *datap, bus_size_t count) \ 455 { \ 456 volatile __CONCAT3(u_int,BITS,_t) *p = \ 457 (volatile __CONCAT3(u_int,BITS,_t) *) \ 458 (bsh + (offset << __CONCAT(bst->bs_stride_,BYTES))); \ 459 \ 460 while (count--) { \ 461 *p = *datap++; \ 462 wbflush(); \ 463 } \ 464 } 465 466 bus_space_write_multi(1,8) 467 bus_space_write_multi(2,16) 468 bus_space_write_multi(4,32) 469 bus_space_write_multi(8,64) 470 471 /* 472 * void bus_space_write_region_N __P((bus_space_tag_t tag, 473 * bus_space_handle_t bsh, bus_size_t offset, 474 * const u_intN_t *addr, size_t count)); 475 * 476 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided 477 * to bus space described by tag/handle starting at `offset'. 478 */ 479 480 #define bus_space_write_region(BYTES,BITS) \ 481 static __inline void \ 482 __CONCAT(bus_space_write_region_,BYTES)(bus_space_tag_t bst, \ 483 bus_space_handle_t bsh, bus_size_t offset, \ 484 const __CONCAT3(u_int,BITS,_t) *datap, bus_size_t count) \ 485 { \ 486 int stride = 1 << __CONCAT(bst->bs_stride_,BYTES); \ 487 volatile __CONCAT3(u_int,BITS,_t) *p = \ 488 (volatile __CONCAT3(u_int,BITS,_t) *) \ 489 (bsh + (offset << __CONCAT(bst->bs_stride_,BYTES))); \ 490 \ 491 while (count--) { \ 492 *p = *datap++; \ 493 p += stride; \ 494 } \ 495 wbflush(); \ 496 } 497 498 bus_space_write_region(1,8) 499 bus_space_write_region(2,16) 500 bus_space_write_region(4,32) 501 bus_space_write_region(8,64) 502 503 /* 504 * void bus_space_set_multi_N __P((bus_space_tag_t tag, 505 * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val, 506 * size_t count)); 507 * 508 * Write the 1, 2, 4, or 8 byte value `val' to bus space described 509 * by tag/handle/offset `count' times. 510 */ 511 512 #define bus_space_set_multi(BYTES,BITS) \ 513 static __inline void \ 514 __CONCAT(bus_space_set_multi_,BYTES)(bus_space_tag_t bst, \ 515 bus_space_handle_t bsh, bus_size_t offset, \ 516 const __CONCAT3(u_int,BITS,_t) data, bus_size_t count) \ 517 { \ 518 volatile __CONCAT3(u_int,BITS,_t) *p = \ 519 (volatile __CONCAT3(u_int,BITS,_t) *) \ 520 (bsh + (offset << __CONCAT(bst->bs_stride_,BYTES))); \ 521 \ 522 while (count--) \ 523 *p = data; \ 524 } 525 526 bus_space_set_multi(1,8) 527 bus_space_set_multi(2,16) 528 bus_space_set_multi(4,32) 529 bus_space_set_multi(8,64) 530 531 /* 532 * void bus_space_set_region_N __P((bus_space_tag_t tag, 533 * bus_space_handle_t bsh, bus_size_t offset, u_intN_t val, 534 * size_t count)); 535 * 536 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described 537 * by tag/handle starting at `offset'. 538 */ 539 540 #define bus_space_set_region(BYTES,BITS) \ 541 static __inline void \ 542 __CONCAT(bus_space_set_region_,BYTES)(bus_space_tag_t bst, \ 543 bus_space_handle_t bsh, bus_size_t offset, \ 544 __CONCAT3(u_int,BITS,_t) data, bus_size_t count) \ 545 { \ 546 int stride = 1 << __CONCAT(bst->bs_stride_,BYTES); \ 547 volatile __CONCAT3(u_int,BITS,_t) *p = \ 548 (volatile __CONCAT3(u_int,BITS,_t) *) \ 549 (bsh + (offset << __CONCAT(bst->bs_stride_,BYTES))); \ 550 \ 551 while (count--) { \ 552 *p = data; \ 553 p += stride; \ 554 } \ 555 wbflush(); \ 556 } 557 558 bus_space_set_region(1,8) 559 bus_space_set_region(2,16) 560 bus_space_set_region(4,32) 561 bus_space_set_region(8,64) 562 563 /* 564 * void bus_space_copy_region_N __P((bus_space_tag_t tag, 565 * bus_space_handle_t bsh1, bus_size_t off1, 566 * bus_space_handle_t bsh2, bus_size_t off2, 567 * size_t count)); 568 * 569 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting 570 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2. 571 */ 572 573 #define bus_space_copy_region(BYTES,BITS) \ 574 static __inline void \ 575 __CONCAT(bus_space_copy_region_,BYTES)(bus_space_tag_t bst, \ 576 bus_space_handle_t srcbsh, bus_size_t srcoffset, \ 577 bus_space_handle_t dstbsh, bus_size_t dstoffset, bus_size_t count) \ 578 { \ 579 int stride = 1 << __CONCAT(bst->bs_stride_,BYTES); \ 580 volatile __CONCAT3(u_int,BITS,_t) *srcp = \ 581 (volatile __CONCAT3(u_int,BITS,_t) *) \ 582 (srcbsh + (srcoffset << __CONCAT(bst->bs_stride_,BYTES))); \ 583 volatile __CONCAT3(u_int,BITS,_t) *dstp = \ 584 (volatile __CONCAT3(u_int,BITS,_t) *) \ 585 (dstbsh + (dstoffset << __CONCAT(bst->bs_stride_,BYTES))); \ 586 bus_size_t offset; \ 587 \ 588 if (srcp >= dstp) { \ 589 /* src after dest: copy forward */ \ 590 for (offset = 0; count > 0; --count, offset += stride) \ 591 dstp[offset] = srcp[offset]; \ 592 } else { \ 593 /* dest after src: copy backward */ \ 594 offset = (count << __CONCAT(bst->bs_stride_,BYTES)) \ 595 - stride; \ 596 for (; count > 0; --count, offset -= stride) \ 597 dstp[offset] = srcp[offset]; \ 598 } \ 599 wbflush(); \ 600 } 601 602 bus_space_copy_region(1,8) 603 bus_space_copy_region(2,16) 604 bus_space_copy_region(4,32) 605 bus_space_copy_region(8,64) 606 607 /* 608 * Operations which handle byte stream data on word access. 609 * 610 * These functions are defined to resolve endian mismatch, by either 611 * - When normal (i.e. stream-less) operations perform byte swap 612 * to resolve endian mismatch, these functions bypass the byte swap. 613 * or 614 * - When bus bridge performs automatic byte swap, these functions 615 * perform byte swap once more, to cancel the bridge's behavior. 616 * 617 * Currently these are just same as normal operations, since all 618 * supported buses are same endian with CPU (i.e. little-endian). 619 * 620 */ 621 #define __BUS_SPACE_HAS_STREAM_METHODS 622 #define bus_space_read_stream_2(tag, bsh, offset) \ 623 bus_space_read_2(tag, bsh, offset) 624 #define bus_space_read_stream_4(tag, bsh, offset) \ 625 bus_space_read_4(tag, bsh, offset) 626 #define bus_space_read_stream_8(tag, bsh, offset) \ 627 bus_space_read_8(tag, bsh, offset) 628 #define bus_space_read_multi_stream_2(tag, bsh, offset, datap, count) \ 629 bus_space_read_multi_2(tag, bsh, offset, datap, count) 630 #define bus_space_read_multi_stream_4(tag, bsh, offset, datap, count) \ 631 bus_space_read_multi_4(tag, bsh, offset, datap, count) 632 #define bus_space_read_multi_stream_8(tag, bsh, offset, datap, count) \ 633 bus_space_read_multi_8(tag, bsh, offset, datap, count) 634 #define bus_space_read_region_stream_2(tag, bsh, offset, datap, count) \ 635 bus_space_read_region_2(tag, bsh, offset, datap, count) 636 #define bus_space_read_region_stream_4(tag, bsh, offset, datap, count) \ 637 bus_space_read_region_4(tag, bsh, offset, datap, count) 638 #define bus_space_read_region_stream_8(tag, bsh, offset, datap, count) \ 639 bus_space_read_region_8(tag, bsh, offset, datap, count) 640 #define bus_space_write_stream_2(tag, bsh, offset, data) \ 641 bus_space_write_2(tag, bsh, offset, data) 642 #define bus_space_write_stream_4(tag, bsh, offset, data) \ 643 bus_space_write_4(tag, bsh, offset, data) 644 #define bus_space_write_stream_8(tag, bsh, offset, data) \ 645 bus_space_write_8(tag, bsh, offset, data) 646 #define bus_space_write_multi_stream_2(tag, bsh, offset, datap, count) \ 647 bus_space_write_multi_2(tag, bsh, offset, datap, count) 648 #define bus_space_write_multi_stream_4(tag, bsh, offset, datap, count) \ 649 bus_space_write_multi_4(tag, bsh, offset, datap, count) 650 #define bus_space_write_multi_stream_8(tag, bsh, offset, datap, count) \ 651 bus_space_write_multi_8(tag, bsh, offset, datap, count) 652 #define bus_space_write_region_stream_2(tag, bsh, offset, datap, count) \ 653 bus_space_write_region_2(tag, bsh, offset, datap, count) 654 #define bus_space_write_region_stream_4(tag, bsh, offset, datap, count) \ 655 bus_space_write_region_4(tag, bsh, offset, datap, count) 656 #define bus_space_write_region_stream_8(tag, bsh, offset, datap, count) \ 657 bus_space_write_region_8(tag, bsh, offset, datap, count) 658 #define bus_space_write_region_stream_2(tag, bsh, offset, datap, count) \ 659 bus_space_write_region_2(tag, bsh, offset, datap, count) 660 #define bus_space_write_region_stream_4(tag, bsh, offset, datap, count) \ 661 bus_space_write_region_4(tag, bsh, offset, datap, count) 662 #define bus_space_write_region_stream_8(tag, bsh, offset, datap, count) \ 663 bus_space_write_region_8(tag, bsh, offset, datap, count) 664 #define bus_space_set_multi_stream_2(tag, bsh, offset, data, count) \ 665 bus_space_set_multi_2(tag, bsh, offset, data, count) 666 #define bus_space_set_multi_stream_4(tag, bsh, offset, data, count) \ 667 bus_space_set_multi_4(tag, bsh, offset, data, count) 668 #define bus_space_set_multi_stream_8(tag, bsh, offset, data, count) \ 669 bus_space_set_multi_8(tag, bsh, offset, data, count) 670 #define bus_space_set_region_stream_2(tag, bsh, offset, data, count) \ 671 bus_space_set_region_2(tag, bsh, offset, data, count) 672 #define bus_space_set_region_stream_4(tag, bsh, offset, data, count) \ 673 bus_space_set_region_4(tag, bsh, offset, data, count) 674 #define bus_space_set_region_stream_8(tag, bsh, offset, data, count) \ 675 bus_space_set_region_8(tag, bsh, offset, data, count) 676 677 /* 678 * Bus read/write barrier methods. 679 * 680 * void bus_space_barrier __P((bus_space_tag_t tag, 681 * bus_space_handle_t bsh, bus_size_t offset, 682 * bus_size_t len, int flags)); 683 * 684 * On the MIPS, we just flush the write buffer. 685 */ 686 #define bus_space_barrier(t, h, o, l, f) \ 687 ((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f)), \ 688 wbflush()) 689 690 #define BUS_SPACE_BARRIER_READ 0x01 691 #define BUS_SPACE_BARRIER_WRITE 0x02 692 693 /* 694 * Flags used in various bus DMA methods. 695 */ 696 #define BUS_DMA_WAITOK 0x00 /* safe to sleep (pseudo-flag) */ 697 #define BUS_DMA_NOWAIT 0x01 /* not safe to sleep */ 698 #define BUS_DMA_ALLOCNOW 0x02 /* perform resource allocation now */ 699 #define BUS_DMA_COHERENT 0x04 /* hint: map memory DMA coherent */ 700 #define BUS_DMA_BUS1 0x10 /* placeholders for bus functions... */ 701 #define BUS_DMA_BUS2 0x20 702 #define BUS_DMA_BUS3 0x40 703 #define BUS_DMA_BUS4 0x80 704 705 #define MIPSCO_DMAMAP_COHERENT 0x100 /* no cache flush necessary on sync */ 706 707 /* Forwards needed by prototypes below. */ 708 struct mbuf; 709 struct uio; 710 711 /* 712 * Operations performed by bus_dmamap_sync(). 713 */ 714 #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ 715 #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ 716 #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ 717 #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ 718 719 typedef struct mipsco_bus_dma_tag *bus_dma_tag_t; 720 typedef struct mipsco_bus_dmamap *bus_dmamap_t; 721 722 /* 723 * bus_dma_segment_t 724 * 725 * Describes a single contiguous DMA transaction. Values 726 * are suitable for programming into DMA registers. 727 */ 728 struct mipsco_bus_dma_segment { 729 /* 730 * PUBLIC MEMBERS: these are used by device drivers. 731 */ 732 bus_addr_t ds_addr; /* DMA address */ 733 bus_size_t ds_len; /* length of transfer */ 734 /* 735 * PRIVATE MEMBERS for the DMA back-end.: not for use by drivers. 736 */ 737 vaddr_t _ds_paddr; /* CPU physical address */ 738 vaddr_t _ds_vaddr; /* virtual address, 0 if invalid */ 739 }; 740 typedef struct mipsco_bus_dma_segment bus_dma_segment_t; 741 742 /* 743 * bus_dma_tag_t 744 * 745 * A machine-dependent opaque type describing the implementation of 746 * DMA for a given bus. 747 */ 748 749 struct mipsco_bus_dma_tag { 750 bus_addr_t dma_offset; 751 752 /* 753 * DMA mapping methods. 754 */ 755 int (*_dmamap_create) __P((bus_dma_tag_t, bus_size_t, int, 756 bus_size_t, bus_size_t, int, bus_dmamap_t *)); 757 void (*_dmamap_destroy) __P((bus_dma_tag_t, bus_dmamap_t)); 758 int (*_dmamap_load) __P((bus_dma_tag_t, bus_dmamap_t, void *, 759 bus_size_t, struct proc *, int)); 760 int (*_dmamap_load_mbuf) __P((bus_dma_tag_t, bus_dmamap_t, 761 struct mbuf *, int)); 762 int (*_dmamap_load_uio) __P((bus_dma_tag_t, bus_dmamap_t, 763 struct uio *, int)); 764 int (*_dmamap_load_raw) __P((bus_dma_tag_t, bus_dmamap_t, 765 bus_dma_segment_t *, int, bus_size_t, int)); 766 void (*_dmamap_unload) __P((bus_dma_tag_t, bus_dmamap_t)); 767 void (*_dmamap_sync) __P((bus_dma_tag_t, bus_dmamap_t, 768 bus_addr_t, bus_size_t, int)); 769 770 /* 771 * DMA memory utility functions. 772 */ 773 int (*_dmamem_alloc) __P((bus_dma_tag_t, bus_size_t, bus_size_t, 774 bus_size_t, bus_dma_segment_t *, int, int *, int)); 775 void (*_dmamem_free) __P((bus_dma_tag_t, 776 bus_dma_segment_t *, int)); 777 int (*_dmamem_map) __P((bus_dma_tag_t, bus_dma_segment_t *, 778 int, size_t, caddr_t *, int)); 779 void (*_dmamem_unmap) __P((bus_dma_tag_t, caddr_t, size_t)); 780 paddr_t (*_dmamem_mmap) __P((bus_dma_tag_t, bus_dma_segment_t *, 781 int, off_t, int, int)); 782 }; 783 784 #define bus_dmamap_create(t, s, n, m, b, f, p) \ 785 (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p)) 786 #define bus_dmamap_destroy(t, p) \ 787 (*(t)->_dmamap_destroy)((t), (p)) 788 #define bus_dmamap_load(t, m, b, s, p, f) \ 789 (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f)) 790 #define bus_dmamap_load_mbuf(t, m, b, f) \ 791 (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f)) 792 #define bus_dmamap_load_uio(t, m, u, f) \ 793 (*(t)->_dmamap_load_uio)((t), (m), (u), (f)) 794 #define bus_dmamap_load_raw(t, m, sg, n, s, f) \ 795 (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f)) 796 #define bus_dmamap_unload(t, p) \ 797 (*(t)->_dmamap_unload)((t), (p)) 798 #define bus_dmamap_sync(t, p, o, l, ops) \ 799 (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops)) 800 #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \ 801 (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f)) 802 #define bus_dmamem_free(t, sg, n) \ 803 (*(t)->_dmamem_free)((t), (sg), (n)) 804 #define bus_dmamem_map(t, sg, n, s, k, f) \ 805 (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f)) 806 #define bus_dmamem_unmap(t, k, s) \ 807 (*(t)->_dmamem_unmap)((t), (k), (s)) 808 #define bus_dmamem_mmap(t, sg, n, o, p, f) \ 809 (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f)) 810 811 /* 812 * bus_dmamap_t 813 * 814 * Describes a DMA mapping. 815 */ 816 struct mipsco_bus_dmamap { 817 /* 818 * PRIVATE MEMBERS: not for use by machine-independent code. 819 */ 820 bus_size_t _dm_size; /* largest DMA transfer mappable */ 821 int _dm_segcnt; /* number of segs this map can map */ 822 bus_size_t _dm_maxsegsz; /* largest possible segment */ 823 bus_size_t _dm_boundary; /* don't cross this */ 824 int _dm_flags; /* misc. flags */ 825 826 /* 827 * Private cookie to be used by the DMA back-end. 828 */ 829 void *_dm_cookie; 830 831 /* 832 * PUBLIC MEMBERS: these are used by machine-independent code. 833 */ 834 bus_size_t dm_mapsize; /* size of the mapping */ 835 int dm_nsegs; /* # valid segments in mapping */ 836 bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 837 }; 838 839 #ifdef _MIPSCO_BUS_DMA_PRIVATE 840 int _bus_dmamap_create __P((bus_dma_tag_t, bus_size_t, int, bus_size_t, 841 bus_size_t, int, bus_dmamap_t *)); 842 void _bus_dmamap_destroy __P((bus_dma_tag_t, bus_dmamap_t)); 843 int _bus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *, 844 bus_size_t, struct proc *, int)); 845 int _bus_dmamap_load_mbuf __P((bus_dma_tag_t, bus_dmamap_t, 846 struct mbuf *, int)); 847 int _bus_dmamap_load_uio __P((bus_dma_tag_t, bus_dmamap_t, 848 struct uio *, int)); 849 int _bus_dmamap_load_raw __P((bus_dma_tag_t, bus_dmamap_t, 850 bus_dma_segment_t *, int, bus_size_t, int)); 851 void _bus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t)); 852 void _mips1_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 853 bus_size_t, int)); 854 void _mips3_bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 855 bus_size_t, int)); 856 857 int _bus_dmamem_alloc __P((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 int _bus_dmamem_alloc_range __P((bus_dma_tag_t tag, bus_size_t size, 861 bus_size_t alignment, bus_size_t boundary, 862 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, 863 paddr_t low, paddr_t high)); 864 void _bus_dmamem_free __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 865 int nsegs)); 866 int _bus_dmamem_map __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 867 int nsegs, size_t size, caddr_t *kvap, int flags)); 868 void _bus_dmamem_unmap __P((bus_dma_tag_t tag, caddr_t kva, 869 size_t size)); 870 paddr_t _bus_dmamem_mmap __P((bus_dma_tag_t tag, bus_dma_segment_t *segs, 871 int nsegs, off_t off, int prot, int flags)); 872 873 int _bus_dmamem_alloc_range __P((bus_dma_tag_t tag, bus_size_t size, 874 bus_size_t alignment, bus_size_t boundary, 875 bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags, 876 paddr_t low, paddr_t high)); 877 #endif /* _MIPSCO_BUS_DMA_PRIVATE */ 878 879 void _bus_dma_tag_init __P((bus_dma_tag_t tag)); 880 void jazz_bus_dma_tag_init __P((bus_dma_tag_t tag)); 881 void isadma_bounce_tag_init __P((bus_dma_tag_t tag)); 882 883 #endif /* _KERNEL */ 884 #endif /* _MIPSCO_BUS_H_ */ 885
Indexes created Fri Oct 03 02:09:57 GMT 2025