1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/param.h> 29 #include <sys/systm.h> 30 #include <sys/bus.h> 31 #include <sys/kernel.h> 32 #include <sys/limits.h> 33 #include <sys/malloc.h> 34 #include <sys/smp.h> 35 #include <vm/vm.h> 36 #include <vm/pmap.h> 37 38 #include <x86/apicreg.h> 39 #include <machine/intr_machdep.h> 40 #include <x86/apicvar.h> 41 #include <machine/md_var.h> 42 #include <x86/vmware.h> 43 44 #include <contrib/dev/acpica/include/acpi.h> 45 #include <contrib/dev/acpica/include/aclocal.h> 46 #include <contrib/dev/acpica/include/actables.h> 47 48 #include <dev/acpica/acpivar.h> 49 #include <dev/pci/pcivar.h> 50 51 /* These two arrays are indexed by APIC IDs. */ 52 static struct { 53 void *io_apic; 54 UINT32 io_vector; 55 } *ioapics; 56 57 static struct lapic_info { 58 u_int la_enabled; 59 u_int la_acpi_id; 60 } *lapics; 61 62 int madt_found_sci_override; 63 static ACPI_TABLE_MADT *madt; 64 static vm_paddr_t madt_physaddr; 65 static vm_offset_t madt_length; 66 67 static MALLOC_DEFINE(M_MADT, "madt_table", "ACPI MADT Table Items"); 68 69 static enum intr_polarity interrupt_polarity(UINT16 IntiFlags, UINT8 Source); 70 static enum intr_trigger interrupt_trigger(UINT16 IntiFlags, UINT8 Source); 71 static int madt_find_cpu(u_int acpi_id, u_int *apic_id); 72 static int madt_find_interrupt(int intr, void **apic, u_int *pin); 73 static void madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg); 74 static void madt_parse_interrupt_override( 75 ACPI_MADT_INTERRUPT_OVERRIDE *intr); 76 static void madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, 77 void *arg __unused); 78 static void madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi); 79 static void madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi); 80 static int madt_probe(void); 81 static int madt_probe_cpus(void); 82 static void madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, 83 void *arg __unused); 84 static void madt_setup_cpus_handler(ACPI_SUBTABLE_HEADER *entry, 85 void *arg __unused); 86 static void madt_register(void *dummy); 87 static int madt_setup_local(void); 88 static int madt_setup_io(void); 89 static void madt_walk_table(acpi_subtable_handler *handler, void *arg); 90 91 static struct apic_enumerator madt_enumerator = { 92 .apic_name = "MADT", 93 .apic_probe = madt_probe, 94 .apic_probe_cpus = madt_probe_cpus, 95 .apic_setup_local = madt_setup_local, 96 .apic_setup_io = madt_setup_io 97 }; 98 99 /* 100 * Look for an ACPI Multiple APIC Description Table ("APIC") 101 */ 102 static int 103 madt_probe(void) 104 { 105 106 madt_physaddr = acpi_find_table(ACPI_SIG_MADT); 107 if (madt_physaddr == 0) 108 return (ENXIO); 109 return (-50); 110 } 111 112 /* 113 * Run through the MP table enumerating CPUs. 114 */ 115 static int 116 madt_probe_cpus(void) 117 { 118 119 madt = acpi_map_table(madt_physaddr, ACPI_SIG_MADT); 120 madt_length = madt->Header.Length; 121 KASSERT(madt != NULL, ("Unable to re-map MADT")); 122 madt_walk_table(madt_probe_cpus_handler, NULL); 123 acpi_unmap_table(madt); 124 madt = NULL; 125 return (0); 126 } 127 128 static const char *x2apic_sandy_dis[] = { 129 "LENOVO", 130 "ASUSTeK Computer Inc.", 131 "SAMSUNG ELECTRONICS CO., LTD.", 132 }; 133 134 /* 135 * Automatically detect several configurations where x2APIC mode is 136 * known to cause troubles. User can override the setting with 137 * hw.x2apic_enable tunable. 138 */ 139 static const char * 140 madt_x2apic_disable_reason(void) 141 { 142 ACPI_TABLE_DMAR *dmartbl; 143 vm_paddr_t dmartbl_physaddr; 144 const char *reason; 145 char *hw_vendor; 146 u_int p[4]; 147 int i; 148 149 reason = NULL; 150 151 dmartbl_physaddr = acpi_find_table(ACPI_SIG_DMAR); 152 if (dmartbl_physaddr != 0) { 153 dmartbl = acpi_map_table(dmartbl_physaddr, ACPI_SIG_DMAR); 154 if ((dmartbl->Flags & ACPI_DMAR_X2APIC_OPT_OUT) != 0) 155 reason = "by DMAR table"; 156 acpi_unmap_table(dmartbl); 157 if (reason != NULL) 158 return (reason); 159 } 160 161 if (vm_guest == VM_GUEST_VMWARE) { 162 vmware_hvcall(0, VMW_HVCMD_GETVCPU_INFO, 163 VMW_HVCMD_DEFAULT_PARAM, p); 164 if ((p[0] & VMW_VCPUINFO_VCPU_RESERVED) != 0 || 165 (p[0] & VMW_VCPUINFO_LEGACY_X2APIC) == 0) 166 return ("inside VMWare without intr redirection"); 167 } 168 169 if (vm_guest == VM_GUEST_NO && 170 CPUID_TO_FAMILY(cpu_id) == 0x6 && 171 CPUID_TO_MODEL(cpu_id) == 0x2a) { 172 hw_vendor = kern_getenv("smbios.planar.maker"); 173 /* 174 * It seems that some SandyBridge-based notebook 175 * BIOSes have a bug which prevents booting AP in 176 * x2APIC mode. Since the only way to detect mobile 177 * CPU is to check northbridge pci id, which cannot be 178 * done that early, disable x2APIC for all such 179 * machines. 180 */ 181 if (hw_vendor != NULL) { 182 for (i = 0; i < nitems(x2apic_sandy_dis); i++) { 183 if (strcmp(hw_vendor, x2apic_sandy_dis[i]) == 184 0) { 185 reason = 186 "for a suspected SandyBridge BIOS bug"; 187 break; 188 } 189 } 190 freeenv(hw_vendor); 191 } 192 if (reason != NULL) 193 return (reason); 194 } 195 196 return (NULL); 197 } 198 199 /* 200 * Initialize the local APIC on the BSP. 201 */ 202 static int 203 madt_setup_local(void) 204 { 205 const char *reason; 206 int user_x2apic; 207 bool bios_x2apic; 208 209 if ((cpu_feature2 & CPUID2_X2APIC) != 0) { 210 reason = madt_x2apic_disable_reason(); 211 bios_x2apic = lapic_is_x2apic(); 212 if (reason != NULL && bios_x2apic) { 213 if (bootverbose) 214 printf("x2APIC should be disabled %s but " 215 "already enabled by BIOS; enabling.\n", 216 reason); 217 reason = NULL; 218 } 219 if (reason == NULL) 220 x2apic_mode = 1; 221 else if (bootverbose) 222 printf("x2APIC available but disabled %s\n", reason); 223 user_x2apic = x2apic_mode; 224 TUNABLE_INT_FETCH("hw.apic.x2apic_mode", &user_x2apic); 225 if (user_x2apic != x2apic_mode) { 226 if (bios_x2apic && !user_x2apic) 227 printf("x2APIC disabled by tunable and " 228 "enabled by BIOS; ignoring tunable."); 229 else 230 x2apic_mode = user_x2apic; 231 } 232 } 233 234 /* 235 * Truncate max_apic_id if not in x2APIC mode. Some structures 236 * will already be allocated with the previous max_apic_id, but 237 * at least we can prevent wasting more memory elsewhere. 238 */ 239 if (!x2apic_mode) 240 max_apic_id = min(max_apic_id, xAPIC_MAX_APIC_ID); 241 242 madt = pmap_mapbios(madt_physaddr, madt_length); 243 lapics = malloc(sizeof(*lapics) * (max_apic_id + 1), M_MADT, 244 M_WAITOK | M_ZERO); 245 madt_walk_table(madt_setup_cpus_handler, NULL); 246 247 lapic_init(madt->Address); 248 printf("ACPI APIC Table: <%.*s %.*s>\n", 249 (int)sizeof(madt->Header.OemId), madt->Header.OemId, 250 (int)sizeof(madt->Header.OemTableId), madt->Header.OemTableId); 251 252 /* 253 * We ignore 64-bit local APIC override entries. Should we 254 * perhaps emit a warning here if we find one? 255 */ 256 return (0); 257 } 258 259 /* 260 * Enumerate I/O APICs and setup interrupt sources. 261 */ 262 static int 263 madt_setup_io(void) 264 { 265 void *ioapic; 266 u_int pin; 267 int i; 268 269 KASSERT(lapics != NULL, ("local APICs not initialized")); 270 271 /* Try to initialize ACPI so that we can access the FADT. */ 272 i = acpi_Startup(); 273 if (ACPI_FAILURE(i)) { 274 printf("MADT: ACPI Startup failed with %s\n", 275 AcpiFormatException(i)); 276 printf("Try disabling either ACPI or apic support.\n"); 277 panic("Using MADT but ACPI doesn't work"); 278 } 279 280 ioapics = malloc(sizeof(*ioapics) * (IOAPIC_MAX_ID + 1), M_MADT, 281 M_WAITOK | M_ZERO); 282 283 /* First, we run through adding I/O APIC's. */ 284 madt_walk_table(madt_parse_apics, NULL); 285 286 /* Second, we run through the table tweaking interrupt sources. */ 287 madt_walk_table(madt_parse_ints, NULL); 288 289 /* 290 * If there was not an explicit override entry for the SCI, 291 * force it to use level trigger and active-low polarity. 292 */ 293 if (!madt_found_sci_override) { 294 if (madt_find_interrupt(AcpiGbl_FADT.SciInterrupt, &ioapic, 295 &pin) != 0) 296 printf("MADT: Could not find APIC for SCI IRQ %u\n", 297 AcpiGbl_FADT.SciInterrupt); 298 else { 299 printf( 300 "MADT: Forcing active-low polarity and level trigger for SCI\n"); 301 ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW); 302 ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL); 303 } 304 } 305 306 /* Third, we register all the I/O APIC's. */ 307 for (i = 0; i <= IOAPIC_MAX_ID; i++) 308 if (ioapics[i].io_apic != NULL) 309 ioapic_register(ioapics[i].io_apic); 310 311 /* Finally, we throw the switch to enable the I/O APIC's. */ 312 acpi_SetDefaultIntrModel(ACPI_INTR_APIC); 313 314 free(ioapics, M_MADT); 315 ioapics = NULL; 316 317 /* NB: this is the last use of the lapics array. */ 318 free(lapics, M_MADT); 319 lapics = NULL; 320 321 return (0); 322 } 323 324 static void 325 madt_register(void *dummy __unused) 326 { 327 328 apic_register_enumerator(&madt_enumerator); 329 } 330 SYSINIT(madt_register, SI_SUB_TUNABLES - 1, SI_ORDER_FIRST, madt_register, NULL); 331 332 /* 333 * Call the handler routine for each entry in the MADT table. 334 */ 335 static void 336 madt_walk_table(acpi_subtable_handler *handler, void *arg) 337 { 338 339 acpi_walk_subtables(madt + 1, (char *)madt + madt->Header.Length, 340 handler, arg); 341 } 342 343 static void 344 madt_parse_cpu(unsigned int apic_id, unsigned int flags) 345 { 346 347 if (!(flags & ACPI_MADT_ENABLED) || 348 #ifdef SMP 349 mp_ncpus == MAXCPU || 350 #endif 351 apic_id > MAX_APIC_ID) 352 return; 353 354 #ifdef SMP 355 mp_ncpus++; 356 mp_maxid = mp_ncpus - 1; 357 #endif 358 max_apic_id = max(apic_id, max_apic_id); 359 } 360 361 static void 362 madt_add_cpu(u_int acpi_id, u_int apic_id, u_int flags) 363 { 364 struct lapic_info *la; 365 366 /* 367 * The MADT does not include a BSP flag, so we have to let the 368 * MP code figure out which CPU is the BSP on its own. 369 */ 370 if (bootverbose) 371 printf("MADT: Found CPU APIC ID %d ACPI ID %u: %s\n", 372 (int)apic_id, acpi_id, flags & ACPI_MADT_ENABLED ? 373 "enabled" : "disabled"); 374 if (!(flags & ACPI_MADT_ENABLED)) 375 return; 376 if (apic_id > max_apic_id) { 377 printf("MADT: Ignoring local APIC ID %u (too high)\n", 378 apic_id); 379 return; 380 } 381 382 la = &lapics[apic_id]; 383 KASSERT(la->la_enabled == 0, ("Duplicate local APIC ID %u", apic_id)); 384 la->la_enabled = 1; 385 la->la_acpi_id = acpi_id; 386 lapic_create(apic_id, 0); 387 } 388 389 static void 390 madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg) 391 { 392 ACPI_MADT_LOCAL_APIC *proc; 393 ACPI_MADT_LOCAL_X2APIC *x2apic; 394 395 switch (entry->Type) { 396 case ACPI_MADT_TYPE_LOCAL_APIC: 397 proc = (ACPI_MADT_LOCAL_APIC *)entry; 398 madt_parse_cpu(proc->Id, proc->LapicFlags); 399 break; 400 case ACPI_MADT_TYPE_LOCAL_X2APIC: 401 x2apic = (ACPI_MADT_LOCAL_X2APIC *)entry; 402 madt_parse_cpu(x2apic->LocalApicId, x2apic->LapicFlags); 403 break; 404 } 405 } 406 407 static void 408 madt_setup_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg) 409 { 410 ACPI_MADT_LOCAL_APIC *proc; 411 ACPI_MADT_LOCAL_X2APIC *x2apic; 412 413 switch (entry->Type) { 414 case ACPI_MADT_TYPE_LOCAL_APIC: 415 proc = (ACPI_MADT_LOCAL_APIC *)entry; 416 madt_add_cpu(proc->ProcessorId, proc->Id, proc->LapicFlags); 417 break; 418 case ACPI_MADT_TYPE_LOCAL_X2APIC: 419 x2apic = (ACPI_MADT_LOCAL_X2APIC *)entry; 420 madt_add_cpu(x2apic->Uid, x2apic->LocalApicId, 421 x2apic->LapicFlags); 422 break; 423 } 424 } 425 426 /* 427 * Add an I/O APIC from an entry in the table. 428 */ 429 static void 430 madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg __unused) 431 { 432 ACPI_MADT_IO_APIC *apic; 433 434 switch (entry->Type) { 435 case ACPI_MADT_TYPE_IO_APIC: 436 apic = (ACPI_MADT_IO_APIC *)entry; 437 if (bootverbose) 438 printf( 439 "MADT: Found IO APIC ID %u, Interrupt %u at %p\n", 440 apic->Id, apic->GlobalIrqBase, 441 (void *)(uintptr_t)apic->Address); 442 if (apic->Id > IOAPIC_MAX_ID) 443 panic("%s: I/O APIC ID %u too high", __func__, 444 apic->Id); 445 if (ioapics[apic->Id].io_apic != NULL) 446 panic("%s: Double APIC ID %u", __func__, apic->Id); 447 ioapics[apic->Id].io_apic = ioapic_create(apic->Address, 448 apic->Id, apic->GlobalIrqBase); 449 ioapics[apic->Id].io_vector = apic->GlobalIrqBase; 450 break; 451 default: 452 break; 453 } 454 } 455 456 /* 457 * Determine properties of an interrupt source. Note that for ACPI these 458 * functions are only used for ISA interrupts, so we assume ISA bus values 459 * (Active Hi, Edge Triggered) for conforming values except for the ACPI 460 * SCI for which we use Active Lo, Level Triggered. 461 */ 462 static enum intr_polarity 463 interrupt_polarity(UINT16 IntiFlags, UINT8 Source) 464 { 465 466 switch (IntiFlags & ACPI_MADT_POLARITY_MASK) { 467 default: 468 printf("WARNING: Bogus Interrupt Polarity. Assume CONFORMS\n"); 469 /* FALLTHROUGH*/ 470 case ACPI_MADT_POLARITY_CONFORMS: 471 if (Source == AcpiGbl_FADT.SciInterrupt) 472 return (INTR_POLARITY_LOW); 473 else 474 return (INTR_POLARITY_HIGH); 475 case ACPI_MADT_POLARITY_ACTIVE_HIGH: 476 return (INTR_POLARITY_HIGH); 477 case ACPI_MADT_POLARITY_ACTIVE_LOW: 478 return (INTR_POLARITY_LOW); 479 } 480 } 481 482 static enum intr_trigger 483 interrupt_trigger(UINT16 IntiFlags, UINT8 Source) 484 { 485 486 switch (IntiFlags & ACPI_MADT_TRIGGER_MASK) { 487 default: 488 printf("WARNING: Bogus Interrupt Trigger Mode. Assume CONFORMS.\n"); 489 /*FALLTHROUGH*/ 490 case ACPI_MADT_TRIGGER_CONFORMS: 491 if (Source == AcpiGbl_FADT.SciInterrupt) 492 return (INTR_TRIGGER_LEVEL); 493 else 494 return (INTR_TRIGGER_EDGE); 495 case ACPI_MADT_TRIGGER_EDGE: 496 return (INTR_TRIGGER_EDGE); 497 case ACPI_MADT_TRIGGER_LEVEL: 498 return (INTR_TRIGGER_LEVEL); 499 } 500 } 501 502 /* 503 * Find the local APIC ID associated with a given ACPI Processor ID. 504 */ 505 static int 506 madt_find_cpu(u_int acpi_id, u_int *apic_id) 507 { 508 int i; 509 510 for (i = 0; i <= max_apic_id; i++) { 511 if (!lapics[i].la_enabled) 512 continue; 513 if (lapics[i].la_acpi_id != acpi_id) 514 continue; 515 *apic_id = i; 516 return (0); 517 } 518 return (ENOENT); 519 } 520 521 /* 522 * Find the IO APIC and pin on that APIC associated with a given global 523 * interrupt. 524 */ 525 static int 526 madt_find_interrupt(int intr, void **apic, u_int *pin) 527 { 528 int i, best; 529 530 best = -1; 531 for (i = 0; i <= IOAPIC_MAX_ID; i++) { 532 if (ioapics[i].io_apic == NULL || 533 ioapics[i].io_vector > intr) 534 continue; 535 if (best == -1 || 536 ioapics[best].io_vector < ioapics[i].io_vector) 537 best = i; 538 } 539 if (best == -1) 540 return (ENOENT); 541 *apic = ioapics[best].io_apic; 542 *pin = intr - ioapics[best].io_vector; 543 if (*pin > 32) 544 printf("WARNING: Found intpin of %u for vector %d\n", *pin, 545 intr); 546 return (0); 547 } 548 549 void 550 madt_parse_interrupt_values(void *entry, 551 enum intr_trigger *trig, enum intr_polarity *pol) 552 { 553 ACPI_MADT_INTERRUPT_OVERRIDE *intr; 554 char buf[64]; 555 556 intr = entry; 557 558 if (bootverbose) 559 printf("MADT: Interrupt override: source %u, irq %u\n", 560 intr->SourceIrq, intr->GlobalIrq); 561 KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero")); 562 563 /* 564 * Lookup the appropriate trigger and polarity modes for this 565 * entry. 566 */ 567 *trig = interrupt_trigger(intr->IntiFlags, intr->SourceIrq); 568 *pol = interrupt_polarity(intr->IntiFlags, intr->SourceIrq); 569 570 /* 571 * If the SCI is identity mapped but has edge trigger and 572 * active-hi polarity or the force_sci_lo tunable is set, 573 * force it to use level/lo. 574 */ 575 if (intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) { 576 madt_found_sci_override = 1; 577 if (getenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) { 578 if (tolower(buf[0]) == 'e') 579 *trig = INTR_TRIGGER_EDGE; 580 else if (tolower(buf[0]) == 'l') 581 *trig = INTR_TRIGGER_LEVEL; 582 else 583 panic( 584 "Invalid trigger %s: must be 'edge' or 'level'", 585 buf); 586 printf("MADT: Forcing SCI to %s trigger\n", 587 *trig == INTR_TRIGGER_EDGE ? "edge" : "level"); 588 } 589 if (getenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) { 590 if (tolower(buf[0]) == 'h') 591 *pol = INTR_POLARITY_HIGH; 592 else if (tolower(buf[0]) == 'l') 593 *pol = INTR_POLARITY_LOW; 594 else 595 panic( 596 "Invalid polarity %s: must be 'high' or 'low'", 597 buf); 598 printf("MADT: Forcing SCI to active %s polarity\n", 599 *pol == INTR_POLARITY_HIGH ? "high" : "low"); 600 } 601 } 602 } 603 604 /* 605 * Parse an interrupt source override for an ISA interrupt. 606 */ 607 static void 608 madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr) 609 { 610 void *new_ioapic, *old_ioapic; 611 u_int new_pin, old_pin; 612 enum intr_trigger trig; 613 enum intr_polarity pol; 614 615 if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 && 616 intr->GlobalIrq == 2) { 617 if (bootverbose) 618 printf("MADT: Skipping timer override\n"); 619 return; 620 } 621 622 if (madt_find_interrupt(intr->GlobalIrq, &new_ioapic, &new_pin) != 0) { 623 printf("MADT: Could not find APIC for vector %u (IRQ %u)\n", 624 intr->GlobalIrq, intr->SourceIrq); 625 return; 626 } 627 628 madt_parse_interrupt_values(intr, &trig, &pol); 629 630 /* Remap the IRQ if it is mapped to a different interrupt vector. */ 631 if (intr->SourceIrq != intr->GlobalIrq) { 632 /* 633 * If the SCI is remapped to a non-ISA global interrupt, 634 * then override the vector we use to setup and allocate 635 * the interrupt. 636 */ 637 if (intr->GlobalIrq > 15 && 638 intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) 639 acpi_OverrideInterruptLevel(intr->GlobalIrq); 640 else 641 ioapic_remap_vector(new_ioapic, new_pin, 642 intr->SourceIrq); 643 if (madt_find_interrupt(intr->SourceIrq, &old_ioapic, 644 &old_pin) != 0) 645 printf("MADT: Could not find APIC for source IRQ %u\n", 646 intr->SourceIrq); 647 else if (ioapic_get_vector(old_ioapic, old_pin) == 648 intr->SourceIrq) 649 ioapic_disable_pin(old_ioapic, old_pin); 650 } 651 652 /* Program the polarity and trigger mode. */ 653 ioapic_set_triggermode(new_ioapic, new_pin, trig); 654 ioapic_set_polarity(new_ioapic, new_pin, pol); 655 } 656 657 /* 658 * Parse an entry for an NMI routed to an IO APIC. 659 */ 660 static void 661 madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi) 662 { 663 void *ioapic; 664 u_int pin; 665 666 if (madt_find_interrupt(nmi->GlobalIrq, &ioapic, &pin) != 0) { 667 printf("MADT: Could not find APIC for vector %u\n", 668 nmi->GlobalIrq); 669 return; 670 } 671 672 ioapic_set_nmi(ioapic, pin); 673 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS)) 674 ioapic_set_triggermode(ioapic, pin, 675 interrupt_trigger(nmi->IntiFlags, 0)); 676 if (!(nmi->IntiFlags & ACPI_MADT_POLARITY_CONFORMS)) 677 ioapic_set_polarity(ioapic, pin, 678 interrupt_polarity(nmi->IntiFlags, 0)); 679 } 680 681 /* 682 * Parse an entry for an NMI routed to a local APIC LVT pin. 683 */ 684 static void 685 madt_handle_local_nmi(u_int acpi_id, UINT8 Lint, UINT16 IntiFlags) 686 { 687 u_int apic_id, pin; 688 689 if (acpi_id == 0xffffffff) 690 apic_id = APIC_ID_ALL; 691 else if (madt_find_cpu(acpi_id, &apic_id) != 0) { 692 if (bootverbose) 693 printf("MADT: Ignoring local NMI routed to " 694 "ACPI CPU %u\n", acpi_id); 695 return; 696 } 697 if (Lint == 0) 698 pin = APIC_LVT_LINT0; 699 else 700 pin = APIC_LVT_LINT1; 701 lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI); 702 if (!(IntiFlags & ACPI_MADT_TRIGGER_CONFORMS)) 703 lapic_set_lvt_triggermode(apic_id, pin, 704 interrupt_trigger(IntiFlags, 0)); 705 if (!(IntiFlags & ACPI_MADT_POLARITY_CONFORMS)) 706 lapic_set_lvt_polarity(apic_id, pin, 707 interrupt_polarity(IntiFlags, 0)); 708 } 709 710 static void 711 madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi) 712 { 713 714 madt_handle_local_nmi(nmi->ProcessorId == 0xff ? 0xffffffff : 715 nmi->ProcessorId, nmi->Lint, nmi->IntiFlags); 716 } 717 718 static void 719 madt_parse_local_x2apic_nmi(ACPI_MADT_LOCAL_X2APIC_NMI *nmi) 720 { 721 722 madt_handle_local_nmi(nmi->Uid, nmi->Lint, nmi->IntiFlags); 723 } 724 725 /* 726 * Parse interrupt entries. 727 */ 728 static void 729 madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, void *arg __unused) 730 { 731 732 switch (entry->Type) { 733 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: 734 madt_parse_interrupt_override( 735 (ACPI_MADT_INTERRUPT_OVERRIDE *)entry); 736 break; 737 case ACPI_MADT_TYPE_NMI_SOURCE: 738 madt_parse_nmi((ACPI_MADT_NMI_SOURCE *)entry); 739 break; 740 case ACPI_MADT_TYPE_LOCAL_APIC_NMI: 741 madt_parse_local_nmi((ACPI_MADT_LOCAL_APIC_NMI *)entry); 742 break; 743 case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: 744 madt_parse_local_x2apic_nmi( 745 (ACPI_MADT_LOCAL_X2APIC_NMI *)entry); 746 break; 747 } 748 } 749 750 /* 751 * Setup per-CPU ACPI IDs. 752 */ 753 static void 754 madt_set_ids(void *dummy) 755 { 756 struct lapic_info *la; 757 struct pcpu *pc; 758 u_int i; 759 760 if (madt == NULL) 761 return; 762 763 KASSERT(lapics != NULL, ("local APICs not initialized")); 764 765 CPU_FOREACH(i) { 766 pc = pcpu_find(i); 767 KASSERT(pc != NULL, ("no pcpu data for CPU %u", i)); 768 la = &lapics[pc->pc_apic_id]; 769 if (!la->la_enabled) 770 panic("APIC: CPU with APIC ID %u is not enabled", 771 pc->pc_apic_id); 772 pc->pc_acpi_id = la->la_acpi_id; 773 if (bootverbose) 774 printf("APIC: CPU %u has ACPI ID %u\n", i, 775 la->la_acpi_id); 776 } 777 } 778 SYSINIT(madt_set_ids, SI_SUB_CPU, SI_ORDER_MIDDLE, madt_set_ids, NULL); 779