1 /*- 2 * Copyright (c) 2001 Mitsuru IWASAKI 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/bus.h> 32 #include <sys/condvar.h> 33 #include <sys/conf.h> 34 #include <sys/fcntl.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/module.h> 38 #include <sys/poll.h> 39 #include <sys/sysctl.h> 40 #include <sys/uio.h> 41 #include <vm/vm.h> 42 #include <vm/pmap.h> 43 44 #include <contrib/dev/acpica/include/acpi.h> 45 #include <contrib/dev/acpica/include/accommon.h> 46 #include <contrib/dev/acpica/include/actables.h> 47 48 #include <dev/acpica/acpivar.h> 49 #include <dev/acpica/acpiio.h> 50 51 #include <machine/nexusvar.h> 52 53 /* 54 * APM driver emulation 55 */ 56 57 #include <machine/apm_bios.h> 58 #include <machine/pc/bios.h> 59 60 #include <i386/bios/apm.h> 61 62 SYSCTL_DECL(_debug_acpi); 63 64 uint32_t acpi_resume_beep; 65 TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep); 66 SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep, 67 0, "Beep the PC speaker when resuming"); 68 uint32_t acpi_reset_video; 69 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video); 70 71 static int intr_model = ACPI_INTR_PIC; 72 static int apm_active; 73 static struct clonedevs *apm_clones; 74 75 MALLOC_DEFINE(M_APMDEV, "apmdev", "APM device emulation"); 76 77 static d_open_t apmopen; 78 static d_close_t apmclose; 79 static d_write_t apmwrite; 80 static d_ioctl_t apmioctl; 81 static d_poll_t apmpoll; 82 static d_kqfilter_t apmkqfilter; 83 static void apmreadfiltdetach(struct knote *kn); 84 static int apmreadfilt(struct knote *kn, long hint); 85 static struct filterops apm_readfiltops = { 86 .f_isfd = 1, 87 .f_detach = apmreadfiltdetach, 88 .f_event = apmreadfilt, 89 }; 90 91 static struct cdevsw apm_cdevsw = { 92 .d_version = D_VERSION, 93 .d_flags = D_TRACKCLOSE | D_NEEDMINOR, 94 .d_open = apmopen, 95 .d_close = apmclose, 96 .d_write = apmwrite, 97 .d_ioctl = apmioctl, 98 .d_poll = apmpoll, 99 .d_name = "apm", 100 .d_kqfilter = apmkqfilter 101 }; 102 103 static int 104 acpi_capm_convert_battstate(struct acpi_battinfo *battp) 105 { 106 int state; 107 108 state = APM_UNKNOWN; 109 110 if (battp->state & ACPI_BATT_STAT_DISCHARG) { 111 if (battp->cap >= 50) 112 state = 0; /* high */ 113 else 114 state = 1; /* low */ 115 } 116 if (battp->state & ACPI_BATT_STAT_CRITICAL) 117 state = 2; /* critical */ 118 if (battp->state & ACPI_BATT_STAT_CHARGING) 119 state = 3; /* charging */ 120 121 /* If still unknown, determine it based on the battery capacity. */ 122 if (state == APM_UNKNOWN) { 123 if (battp->cap >= 50) 124 state = 0; /* high */ 125 else 126 state = 1; /* low */ 127 } 128 129 return (state); 130 } 131 132 static int 133 acpi_capm_convert_battflags(struct acpi_battinfo *battp) 134 { 135 int flags; 136 137 flags = 0; 138 139 if (battp->cap >= 50) 140 flags |= APM_BATT_HIGH; 141 else { 142 if (battp->state & ACPI_BATT_STAT_CRITICAL) 143 flags |= APM_BATT_CRITICAL; 144 else 145 flags |= APM_BATT_LOW; 146 } 147 if (battp->state & ACPI_BATT_STAT_CHARGING) 148 flags |= APM_BATT_CHARGING; 149 if (battp->state == ACPI_BATT_STAT_NOT_PRESENT) 150 flags = APM_BATT_NOT_PRESENT; 151 152 return (flags); 153 } 154 155 static int 156 acpi_capm_get_info(apm_info_t aip) 157 { 158 int acline; 159 struct acpi_battinfo batt; 160 161 aip->ai_infoversion = 1; 162 aip->ai_major = 1; 163 aip->ai_minor = 2; 164 aip->ai_status = apm_active; 165 aip->ai_capabilities= 0xff00; /* unknown */ 166 167 if (acpi_acad_get_acline(&acline)) 168 aip->ai_acline = APM_UNKNOWN; /* unknown */ 169 else 170 aip->ai_acline = acline; /* on/off */ 171 172 if (acpi_battery_get_battinfo(NULL, &batt) != 0) { 173 aip->ai_batt_stat = APM_UNKNOWN; 174 aip->ai_batt_life = APM_UNKNOWN; 175 aip->ai_batt_time = -1; /* unknown */ 176 aip->ai_batteries = ~0U; /* unknown */ 177 } else { 178 aip->ai_batt_stat = acpi_capm_convert_battstate(&batt); 179 aip->ai_batt_life = batt.cap; 180 aip->ai_batt_time = (batt.min == -1) ? -1 : batt.min * 60; 181 aip->ai_batteries = acpi_battery_get_units(); 182 } 183 184 return (0); 185 } 186 187 static int 188 acpi_capm_get_pwstatus(apm_pwstatus_t app) 189 { 190 device_t dev; 191 int acline, unit, error; 192 struct acpi_battinfo batt; 193 194 if (app->ap_device != PMDV_ALLDEV && 195 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 196 return (1); 197 198 if (app->ap_device == PMDV_ALLDEV) 199 error = acpi_battery_get_battinfo(NULL, &batt); 200 else { 201 unit = app->ap_device - PMDV_BATT0; 202 dev = devclass_get_device(devclass_find("battery"), unit); 203 if (dev != NULL) 204 error = acpi_battery_get_battinfo(dev, &batt); 205 else 206 error = ENXIO; 207 } 208 if (error) 209 return (1); 210 211 app->ap_batt_stat = acpi_capm_convert_battstate(&batt); 212 app->ap_batt_flag = acpi_capm_convert_battflags(&batt); 213 app->ap_batt_life = batt.cap; 214 app->ap_batt_time = (batt.min == -1) ? -1 : batt.min * 60; 215 216 if (acpi_acad_get_acline(&acline)) 217 app->ap_acline = APM_UNKNOWN; 218 else 219 app->ap_acline = acline; /* on/off */ 220 221 return (0); 222 } 223 224 /* Create single-use devices for /dev/apm and /dev/apmctl. */ 225 static void 226 apm_clone(void *arg, struct ucred *cred, char *name, int namelen, 227 struct cdev **dev) 228 { 229 int ctl_dev, unit; 230 231 if (*dev != NULL) 232 return; 233 if (strcmp(name, "apmctl") == 0) 234 ctl_dev = TRUE; 235 else if (strcmp(name, "apm") == 0) 236 ctl_dev = FALSE; 237 else 238 return; 239 240 /* Always create a new device and unit number. */ 241 unit = -1; 242 if (clone_create(&apm_clones, &apm_cdevsw, &unit, dev, 0)) { 243 if (ctl_dev) { 244 *dev = make_dev(&apm_cdevsw, unit, 245 UID_ROOT, GID_OPERATOR, 0660, "apmctl%d", unit); 246 } else { 247 *dev = make_dev(&apm_cdevsw, unit, 248 UID_ROOT, GID_OPERATOR, 0664, "apm%d", unit); 249 } 250 if (*dev != NULL) { 251 dev_ref(*dev); 252 (*dev)->si_flags |= SI_CHEAPCLONE; 253 } 254 } 255 } 256 257 /* Create a struct for tracking per-device suspend notification. */ 258 static struct apm_clone_data * 259 apm_create_clone(struct cdev *dev, struct acpi_softc *acpi_sc) 260 { 261 struct apm_clone_data *clone; 262 263 clone = malloc(sizeof(*clone), M_APMDEV, M_WAITOK); 264 clone->cdev = dev; 265 clone->acpi_sc = acpi_sc; 266 clone->notify_status = APM_EV_NONE; 267 bzero(&clone->sel_read, sizeof(clone->sel_read)); 268 knlist_init_mtx(&clone->sel_read.si_note, &acpi_mutex); 269 270 /* 271 * The acpi device is always managed by devd(8) and is considered 272 * writable (i.e., ack is required to allow suspend to proceed.) 273 */ 274 if (strcmp("acpi", devtoname(dev)) == 0) 275 clone->flags = ACPI_EVF_DEVD | ACPI_EVF_WRITE; 276 else 277 clone->flags = ACPI_EVF_NONE; 278 279 ACPI_LOCK(acpi); 280 STAILQ_INSERT_TAIL(&acpi_sc->apm_cdevs, clone, entries); 281 ACPI_UNLOCK(acpi); 282 return (clone); 283 } 284 285 static int 286 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td) 287 { 288 struct acpi_softc *acpi_sc; 289 struct apm_clone_data *clone; 290 291 acpi_sc = devclass_get_softc(devclass_find("acpi"), 0); 292 clone = apm_create_clone(dev, acpi_sc); 293 dev->si_drv1 = clone; 294 295 /* If the device is opened for write, record that. */ 296 if ((flag & FWRITE) != 0) 297 clone->flags |= ACPI_EVF_WRITE; 298 299 return (0); 300 } 301 302 static int 303 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td) 304 { 305 struct apm_clone_data *clone; 306 struct acpi_softc *acpi_sc; 307 308 clone = dev->si_drv1; 309 acpi_sc = clone->acpi_sc; 310 311 /* We are about to lose a reference so check if suspend should occur */ 312 if (acpi_sc->acpi_next_sstate != 0 && 313 clone->notify_status != APM_EV_ACKED) 314 acpi_AckSleepState(clone, 0); 315 316 /* Remove this clone's data from the list and free it. */ 317 ACPI_LOCK(acpi); 318 STAILQ_REMOVE(&acpi_sc->apm_cdevs, clone, apm_clone_data, entries); 319 knlist_destroy(&clone->sel_read.si_note); 320 ACPI_UNLOCK(acpi); 321 free(clone, M_APMDEV); 322 destroy_dev_sched(dev); 323 return (0); 324 } 325 326 static int 327 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 328 { 329 int error; 330 struct apm_clone_data *clone; 331 struct acpi_softc *acpi_sc; 332 struct apm_info info; 333 struct apm_event_info *ev_info; 334 apm_info_old_t aiop; 335 336 error = 0; 337 clone = dev->si_drv1; 338 acpi_sc = clone->acpi_sc; 339 340 switch (cmd) { 341 case APMIO_SUSPEND: 342 if ((flag & FWRITE) == 0) 343 return (EPERM); 344 if (acpi_sc->acpi_next_sstate == 0) { 345 if (acpi_sc->acpi_suspend_sx != ACPI_STATE_S5) { 346 error = acpi_ReqSleepState(acpi_sc, 347 acpi_sc->acpi_suspend_sx); 348 } else { 349 printf( 350 "power off via apm suspend not supported\n"); 351 error = ENXIO; 352 } 353 } else 354 error = acpi_AckSleepState(clone, 0); 355 break; 356 case APMIO_STANDBY: 357 if ((flag & FWRITE) == 0) 358 return (EPERM); 359 if (acpi_sc->acpi_next_sstate == 0) { 360 if (acpi_sc->acpi_standby_sx != ACPI_STATE_S5) { 361 error = acpi_ReqSleepState(acpi_sc, 362 acpi_sc->acpi_standby_sx); 363 } else { 364 printf( 365 "power off via apm standby not supported\n"); 366 error = ENXIO; 367 } 368 } else 369 error = acpi_AckSleepState(clone, 0); 370 break; 371 case APMIO_NEXTEVENT: 372 printf("apm nextevent start\n"); 373 ACPI_LOCK(acpi); 374 if (acpi_sc->acpi_next_sstate != 0 && clone->notify_status == 375 APM_EV_NONE) { 376 ev_info = (struct apm_event_info *)addr; 377 if (acpi_sc->acpi_next_sstate <= ACPI_STATE_S3) 378 ev_info->type = PMEV_STANDBYREQ; 379 else 380 ev_info->type = PMEV_SUSPENDREQ; 381 ev_info->index = 0; 382 clone->notify_status = APM_EV_NOTIFIED; 383 printf("apm event returning %d\n", ev_info->type); 384 } else 385 error = EAGAIN; 386 ACPI_UNLOCK(acpi); 387 break; 388 case APMIO_GETINFO_OLD: 389 if (acpi_capm_get_info(&info)) 390 error = ENXIO; 391 aiop = (apm_info_old_t)addr; 392 aiop->ai_major = info.ai_major; 393 aiop->ai_minor = info.ai_minor; 394 aiop->ai_acline = info.ai_acline; 395 aiop->ai_batt_stat = info.ai_batt_stat; 396 aiop->ai_batt_life = info.ai_batt_life; 397 aiop->ai_status = info.ai_status; 398 break; 399 case APMIO_GETINFO: 400 if (acpi_capm_get_info((apm_info_t)addr)) 401 error = ENXIO; 402 break; 403 case APMIO_GETPWSTATUS: 404 if (acpi_capm_get_pwstatus((apm_pwstatus_t)addr)) 405 error = ENXIO; 406 break; 407 case APMIO_ENABLE: 408 if ((flag & FWRITE) == 0) 409 return (EPERM); 410 apm_active = 1; 411 break; 412 case APMIO_DISABLE: 413 if ((flag & FWRITE) == 0) 414 return (EPERM); 415 apm_active = 0; 416 break; 417 case APMIO_HALTCPU: 418 break; 419 case APMIO_NOTHALTCPU: 420 break; 421 case APMIO_DISPLAY: 422 if ((flag & FWRITE) == 0) 423 return (EPERM); 424 break; 425 case APMIO_BIOS: 426 if ((flag & FWRITE) == 0) 427 return (EPERM); 428 bzero(addr, sizeof(struct apm_bios_arg)); 429 break; 430 default: 431 error = EINVAL; 432 break; 433 } 434 435 return (error); 436 } 437 438 static int 439 apmwrite(struct cdev *dev, struct uio *uio, int ioflag) 440 { 441 return (uio->uio_resid); 442 } 443 444 static int 445 apmpoll(struct cdev *dev, int events, struct thread *td) 446 { 447 struct apm_clone_data *clone; 448 int revents; 449 450 revents = 0; 451 ACPI_LOCK(acpi); 452 clone = dev->si_drv1; 453 if (clone->acpi_sc->acpi_next_sstate) 454 revents |= events & (POLLIN | POLLRDNORM); 455 else 456 selrecord(td, &clone->sel_read); 457 ACPI_UNLOCK(acpi); 458 return (revents); 459 } 460 461 static int 462 apmkqfilter(struct cdev *dev, struct knote *kn) 463 { 464 struct apm_clone_data *clone; 465 466 ACPI_LOCK(acpi); 467 clone = dev->si_drv1; 468 kn->kn_hook = clone; 469 kn->kn_fop = &apm_readfiltops; 470 knlist_add(&clone->sel_read.si_note, kn, 0); 471 ACPI_UNLOCK(acpi); 472 return (0); 473 } 474 475 static void 476 apmreadfiltdetach(struct knote *kn) 477 { 478 struct apm_clone_data *clone; 479 480 ACPI_LOCK(acpi); 481 clone = kn->kn_hook; 482 knlist_remove(&clone->sel_read.si_note, kn, 0); 483 ACPI_UNLOCK(acpi); 484 } 485 486 static int 487 apmreadfilt(struct knote *kn, long hint) 488 { 489 struct apm_clone_data *clone; 490 int sleeping; 491 492 ACPI_LOCK(acpi); 493 clone = kn->kn_hook; 494 sleeping = clone->acpi_sc->acpi_next_sstate ? 1 : 0; 495 ACPI_UNLOCK(acpi); 496 return (sleeping); 497 } 498 499 int 500 acpi_machdep_init(device_t dev) 501 { 502 struct acpi_softc *acpi_sc; 503 504 acpi_sc = devclass_get_softc(devclass_find("acpi"), 0); 505 506 /* Create a clone for /dev/acpi also. */ 507 STAILQ_INIT(&acpi_sc->apm_cdevs); 508 acpi_sc->acpi_clone = apm_create_clone(acpi_sc->acpi_dev_t, acpi_sc); 509 clone_setup(&apm_clones); 510 EVENTHANDLER_REGISTER(dev_clone, apm_clone, 0, 1000); 511 acpi_install_wakeup_handler(acpi_sc); 512 513 if (intr_model == ACPI_INTR_PIC) 514 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt, 515 INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW); 516 else 517 acpi_SetIntrModel(intr_model); 518 519 SYSCTL_ADD_UINT(&acpi_sc->acpi_sysctl_ctx, 520 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO, 521 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0, 522 "Call the VESA reset BIOS vector on the resume path"); 523 524 return (0); 525 } 526 527 void 528 acpi_SetDefaultIntrModel(int model) 529 { 530 531 intr_model = model; 532 } 533 534 /* Check BIOS date. If 1998 or older, disable ACPI. */ 535 int 536 acpi_machdep_quirks(int *quirks) 537 { 538 char *va; 539 int year; 540 541 /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */ 542 va = pmap_mapbios(0xffff0, 16); 543 sscanf(va + 11, "%2d", &year); 544 pmap_unmapbios((vm_offset_t)va, 16); 545 546 /* 547 * Date must be >= 1/1/1999 or we don't trust ACPI. Note that this 548 * check must be changed by my 114th birthday. 549 */ 550 if (year > 90 && year < 99) 551 *quirks = ACPI_Q_BROKEN; 552 553 return (0); 554 } 555 556 void 557 acpi_cpu_c1() 558 { 559 __asm __volatile("sti; hlt"); 560 } 561 562 /* 563 * Support for mapping ACPI tables during early boot. This abuses the 564 * crashdump map because the kernel cannot allocate KVA in 565 * pmap_mapbios() when this is used. This makes the following 566 * assumptions about how we use this KVA: pages 0 and 1 are used to 567 * map in the header of each table found via the RSDT or XSDT and 568 * pages 2 to n are used to map in the RSDT or XSDT. This has to use 569 * 2 pages for the table headers in case a header spans a page 570 * boundary. 571 * 572 * XXX: We don't ensure the table fits in the available address space 573 * in the crashdump map. 574 */ 575 576 /* 577 * Map some memory using the crashdump map. 'offset' is an offset in 578 * pages into the crashdump map to use for the start of the mapping. 579 */ 580 static void * 581 table_map(vm_paddr_t pa, int offset, vm_offset_t length) 582 { 583 vm_offset_t va, off; 584 void *data; 585 586 off = pa & PAGE_MASK; 587 length = roundup(length + off, PAGE_SIZE); 588 pa = pa & PG_FRAME; 589 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) + 590 (offset * PAGE_SIZE); 591 data = (void *)(va + off); 592 length -= PAGE_SIZE; 593 while (length > 0) { 594 va += PAGE_SIZE; 595 pa += PAGE_SIZE; 596 length -= PAGE_SIZE; 597 pmap_kenter(va, pa); 598 invlpg(va); 599 } 600 return (data); 601 } 602 603 /* Unmap memory previously mapped with table_map(). */ 604 static void 605 table_unmap(void *data, vm_offset_t length) 606 { 607 vm_offset_t va, off; 608 609 va = (vm_offset_t)data; 610 off = va & PAGE_MASK; 611 length = roundup(length + off, PAGE_SIZE); 612 va &= ~PAGE_MASK; 613 while (length > 0) { 614 pmap_kremove(va); 615 invlpg(va); 616 va += PAGE_SIZE; 617 length -= PAGE_SIZE; 618 } 619 } 620 621 /* 622 * Map a table at a given offset into the crashdump map. It first 623 * maps the header to determine the table length and then maps the 624 * entire table. 625 */ 626 static void * 627 map_table(vm_paddr_t pa, int offset, const char *sig) 628 { 629 ACPI_TABLE_HEADER *header; 630 vm_offset_t length; 631 void *table; 632 633 header = table_map(pa, offset, sizeof(ACPI_TABLE_HEADER)); 634 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) { 635 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 636 return (NULL); 637 } 638 length = header->Length; 639 table_unmap(header, sizeof(ACPI_TABLE_HEADER)); 640 table = table_map(pa, offset, length); 641 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 642 if (bootverbose) 643 printf("ACPI: Failed checksum for table %s\n", sig); 644 #if (ACPI_CHECKSUM_ABORT) 645 table_unmap(table, length); 646 return (NULL); 647 #endif 648 } 649 return (table); 650 } 651 652 /* 653 * See if a given ACPI table is the requested table. Returns the 654 * length of the able if it matches or zero on failure. 655 */ 656 static int 657 probe_table(vm_paddr_t address, const char *sig) 658 { 659 ACPI_TABLE_HEADER *table; 660 661 table = table_map(address, 0, sizeof(ACPI_TABLE_HEADER)); 662 if (table == NULL) { 663 if (bootverbose) 664 printf("ACPI: Failed to map table at 0x%jx\n", 665 (uintmax_t)address); 666 return (0); 667 } 668 if (bootverbose) 669 printf("Table '%.4s' at 0x%jx\n", table->Signature, 670 (uintmax_t)address); 671 672 if (strncmp(table->Signature, sig, ACPI_NAME_SIZE) != 0) { 673 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 674 return (0); 675 } 676 table_unmap(table, sizeof(ACPI_TABLE_HEADER)); 677 return (1); 678 } 679 680 /* 681 * Try to map a table at a given physical address previously returned 682 * by acpi_find_table(). 683 */ 684 void * 685 acpi_map_table(vm_paddr_t pa, const char *sig) 686 { 687 688 return (map_table(pa, 0, sig)); 689 } 690 691 /* Unmap a table previously mapped via acpi_map_table(). */ 692 void 693 acpi_unmap_table(void *table) 694 { 695 ACPI_TABLE_HEADER *header; 696 697 header = (ACPI_TABLE_HEADER *)table; 698 table_unmap(table, header->Length); 699 } 700 701 /* 702 * Return the physical address of the requested table or zero if one 703 * is not found. 704 */ 705 vm_paddr_t 706 acpi_find_table(const char *sig) 707 { 708 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 709 ACPI_TABLE_RSDP *rsdp; 710 ACPI_TABLE_RSDT *rsdt; 711 ACPI_TABLE_XSDT *xsdt; 712 ACPI_TABLE_HEADER *table; 713 vm_paddr_t addr; 714 int i, count; 715 716 if (resource_disabled("acpi", 0)) 717 return (0); 718 719 /* 720 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 721 * calls pmap_mapbios() to find the RSDP, we assume that we can use 722 * pmap_mapbios() to map the RSDP. 723 */ 724 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 725 return (0); 726 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 727 if (rsdp == NULL) { 728 if (bootverbose) 729 printf("ACPI: Failed to map RSDP\n"); 730 return (0); 731 } 732 733 /* 734 * For ACPI >= 2.0, use the XSDT if it is available. 735 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 2 736 * in the crashdump area. Pages 0 and 1 are used to map in the 737 * headers of candidate ACPI tables. 738 */ 739 addr = 0; 740 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 741 /* 742 * AcpiOsGetRootPointer only verifies the checksum for 743 * the version 1.0 portion of the RSDP. Version 2.0 has 744 * an additional checksum that we verify first. 745 */ 746 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 747 if (bootverbose) 748 printf("ACPI: RSDP failed extended checksum\n"); 749 return (0); 750 } 751 xsdt = map_table(rsdp->XsdtPhysicalAddress, 2, ACPI_SIG_XSDT); 752 if (xsdt == NULL) { 753 if (bootverbose) 754 printf("ACPI: Failed to map XSDT\n"); 755 return (0); 756 } 757 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 758 sizeof(UINT64); 759 for (i = 0; i < count; i++) 760 if (probe_table(xsdt->TableOffsetEntry[i], sig)) { 761 addr = xsdt->TableOffsetEntry[i]; 762 break; 763 } 764 acpi_unmap_table(xsdt); 765 } else { 766 rsdt = map_table(rsdp->RsdtPhysicalAddress, 2, ACPI_SIG_RSDT); 767 if (rsdt == NULL) { 768 if (bootverbose) 769 printf("ACPI: Failed to map RSDT\n"); 770 return (0); 771 } 772 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 773 sizeof(UINT32); 774 for (i = 0; i < count; i++) 775 if (probe_table(rsdt->TableOffsetEntry[i], sig)) { 776 addr = rsdt->TableOffsetEntry[i]; 777 break; 778 } 779 acpi_unmap_table(rsdt); 780 } 781 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 782 if (addr == 0) { 783 if (bootverbose) 784 printf("ACPI: No %s table found\n", sig); 785 return (0); 786 } 787 if (bootverbose) 788 printf("%s: Found table at 0x%jx\n", sig, (uintmax_t)addr); 789 790 /* 791 * Verify that we can map the full table and that its checksum is 792 * correct, etc. 793 */ 794 table = map_table(addr, 0, sig); 795 if (table == NULL) 796 return (0); 797 acpi_unmap_table(table); 798 799 return (addr); 800 } 801 802 /* 803 * ACPI nexus(4) driver. 804 */ 805 static int 806 nexus_acpi_probe(device_t dev) 807 { 808 int error; 809 810 error = acpi_identify(); 811 if (error) 812 return (error); 813 814 return (BUS_PROBE_DEFAULT); 815 } 816 817 static int 818 nexus_acpi_attach(device_t dev) 819 { 820 821 nexus_init_resources(); 822 bus_generic_probe(dev); 823 if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL) 824 panic("failed to add acpi0 device"); 825 826 return (bus_generic_attach(dev)); 827 } 828 829 static device_method_t nexus_acpi_methods[] = { 830 /* Device interface */ 831 DEVMETHOD(device_probe, nexus_acpi_probe), 832 DEVMETHOD(device_attach, nexus_acpi_attach), 833 834 { 0, 0 } 835 }; 836 837 DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver); 838 static devclass_t nexus_devclass; 839 840 DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0); 841