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sys/x86/acpica/madt.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/bus.h> 34 #include <sys/kernel.h> 35 #include <sys/limits.h> 36 #include <sys/malloc.h> 37 #include <sys/smp.h> 38 #include <vm/vm.h> 39 #include <vm/pmap.h> 40 41 #include <x86/apicreg.h> 42 #include <machine/intr_machdep.h> 43 #include <x86/apicvar.h> 44 #include <machine/md_var.h> 45 #include <x86/vmware.h> 46 47 #include <contrib/dev/acpica/include/acpi.h> 48 #include <contrib/dev/acpica/include/aclocal.h> 49 #include <contrib/dev/acpica/include/actables.h> 50 51 #include <dev/acpica/acpivar.h> 52 #include <dev/pci/pcivar.h> 53 54 /* These two arrays are indexed by APIC IDs. */ 55 static struct { 56 void *io_apic; 57 UINT32 io_vector; 58 } *ioapics; 59 60 static struct lapic_info { 61 u_int la_enabled; 62 u_int la_acpi_id; 63 } *lapics; 64 65 int madt_found_sci_override; 66 static ACPI_TABLE_MADT *madt; 67 static vm_paddr_t madt_physaddr; 68 static vm_offset_t madt_length; 69 70 static MALLOC_DEFINE(M_MADT, "madt_table", "ACPI MADT Table Items"); 71 72 static enum intr_polarity interrupt_polarity(UINT16 IntiFlags, UINT8 Source); 73 static enum intr_trigger interrupt_trigger(UINT16 IntiFlags, UINT8 Source); 74 static int madt_find_cpu(u_int acpi_id, u_int *apic_id); 75 static int madt_find_interrupt(int intr, void **apic, u_int *pin); 76 static void madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg); 77 static void madt_parse_interrupt_override( 78 ACPI_MADT_INTERRUPT_OVERRIDE *intr); 79 static void madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, 80 void *arg __unused); 81 static void madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi); 82 static void madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi); 83 static int madt_probe(void); 84 static int madt_probe_cpus(void); 85 static void madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, 86 void *arg __unused); 87 static void madt_setup_cpus_handler(ACPI_SUBTABLE_HEADER *entry, 88 void *arg __unused); 89 static void madt_register(void *dummy); 90 static int madt_setup_local(void); 91 static int madt_setup_io(void); 92 static void madt_walk_table(acpi_subtable_handler *handler, void *arg); 93 94 static struct apic_enumerator madt_enumerator = { 95 .apic_name = "MADT", 96 .apic_probe = madt_probe, 97 .apic_probe_cpus = madt_probe_cpus, 98 .apic_setup_local = madt_setup_local, 99 .apic_setup_io = madt_setup_io 100 }; 101 102 /* 103 * Look for an ACPI Multiple APIC Description Table ("APIC") 104 */ 105 static int 106 madt_probe(void) 107 { 108 109 madt_physaddr = acpi_find_table(ACPI_SIG_MADT); 110 if (madt_physaddr == 0) 111 return (ENXIO); 112 return (-50); 113 } 114 115 /* 116 * Run through the MP table enumerating CPUs. 117 */ 118 static int 119 madt_probe_cpus(void) 120 { 121 122 madt = acpi_map_table(madt_physaddr, ACPI_SIG_MADT); 123 madt_length = madt->Header.Length; 124 KASSERT(madt != NULL, ("Unable to re-map MADT")); 125 madt_walk_table(madt_probe_cpus_handler, NULL); 126 acpi_unmap_table(madt); 127 madt = NULL; 128 return (0); 129 } 130 131 static const char *x2apic_sandy_dis[] = { 132 "LENOVO", 133 "ASUSTeK Computer Inc.", 134 "SAMSUNG ELECTRONICS CO., LTD.", 135 }; 136 137 /* 138 * Automatically detect several configurations where x2APIC mode is 139 * known to cause troubles. User can override the setting with 140 * hw.x2apic_enable tunable. 141 */ 142 static const char * 143 madt_x2apic_disable_reason(void) 144 { 145 ACPI_TABLE_DMAR *dmartbl; 146 vm_paddr_t dmartbl_physaddr; 147 const char *reason; 148 char *hw_vendor; 149 u_int p[4]; 150 int i; 151 152 reason = NULL; 153 154 dmartbl_physaddr = acpi_find_table(ACPI_SIG_DMAR); 155 if (dmartbl_physaddr != 0) { 156 dmartbl = acpi_map_table(dmartbl_physaddr, ACPI_SIG_DMAR); 157 if ((dmartbl->Flags & ACPI_DMAR_X2APIC_OPT_OUT) != 0) 158 reason = "by DMAR table"; 159 acpi_unmap_table(dmartbl); 160 if (reason != NULL) 161 return (reason); 162 } 163 164 if (vm_guest == VM_GUEST_VMWARE) { 165 vmware_hvcall(VMW_HVCMD_GETVCPU_INFO, p); 166 if ((p[0] & VMW_VCPUINFO_VCPU_RESERVED) != 0 || 167 (p[0] & VMW_VCPUINFO_LEGACY_X2APIC) == 0) 168 return ("inside VMWare without intr redirection"); 169 } 170 171 if (vm_guest == VM_GUEST_NO && 172 CPUID_TO_FAMILY(cpu_id) == 0x6 && 173 CPUID_TO_MODEL(cpu_id) == 0x2a) { 174 hw_vendor = kern_getenv("smbios.planar.maker"); 175 /* 176 * It seems that some SandyBridge-based notebook 177 * BIOSes have a bug which prevents booting AP in 178 * x2APIC mode. Since the only way to detect mobile 179 * CPU is to check northbridge pci id, which cannot be 180 * done that early, disable x2APIC for all such 181 * machines. 182 */ 183 if (hw_vendor != NULL) { 184 for (i = 0; i < nitems(x2apic_sandy_dis); i++) { 185 if (strcmp(hw_vendor, x2apic_sandy_dis[i]) == 186 0) { 187 reason = 188 "for a suspected SandyBridge BIOS bug"; 189 break; 190 } 191 } 192 freeenv(hw_vendor); 193 } 194 if (reason != NULL) 195 return (reason); 196 } 197 198 return (NULL); 199 } 200 201 /* 202 * Initialize the local APIC on the BSP. 203 */ 204 static int 205 madt_setup_local(void) 206 { 207 const char *reason; 208 int user_x2apic; 209 bool bios_x2apic; 210 211 if ((cpu_feature2 & CPUID2_X2APIC) != 0) { 212 reason = madt_x2apic_disable_reason(); 213 bios_x2apic = lapic_is_x2apic(); 214 if (reason != NULL && bios_x2apic) { 215 if (bootverbose) 216 printf("x2APIC should be disabled %s but " 217 "already enabled by BIOS; enabling.\n", 218 reason); 219 reason = NULL; 220 } 221 if (reason == NULL) 222 x2apic_mode = 1; 223 else if (bootverbose) 224 printf("x2APIC available but disabled %s\n", reason); 225 user_x2apic = x2apic_mode; 226 TUNABLE_INT_FETCH("hw.x2apic_enable", &user_x2apic); 227 if (user_x2apic != x2apic_mode) { 228 if (bios_x2apic && !user_x2apic) 229 printf("x2APIC disabled by tunable and " 230 "enabled by BIOS; ignoring tunable."); 231 else 232 x2apic_mode = user_x2apic; 233 } 234 } 235 236 /* 237 * Truncate max_apic_id if not in x2APIC mode. Some structures 238 * will already be allocated with the previous max_apic_id, but 239 * at least we can prevent wasting more memory elsewhere. 240 */ 241 if (!x2apic_mode) 242 max_apic_id = min(max_apic_id, xAPIC_MAX_APIC_ID); 243 244 madt = pmap_mapbios(madt_physaddr, madt_length); 245 lapics = malloc(sizeof(*lapics) * (max_apic_id + 1), M_MADT, 246 M_WAITOK | M_ZERO); 247 madt_walk_table(madt_setup_cpus_handler, NULL); 248 249 lapic_init(madt->Address); 250 printf("ACPI APIC Table: <%.*s %.*s>\n", 251 (int)sizeof(madt->Header.OemId), madt->Header.OemId, 252 (int)sizeof(madt->Header.OemTableId), madt->Header.OemTableId); 253 254 /* 255 * We ignore 64-bit local APIC override entries. Should we 256 * perhaps emit a warning here if we find one? 257 */ 258 return (0); 259 } 260 261 /* 262 * Enumerate I/O APICs and setup interrupt sources. 263 */ 264 static int 265 madt_setup_io(void) 266 { 267 void *ioapic; 268 u_int pin; 269 int i; 270 271 KASSERT(lapics != NULL, ("local APICs not initialized")); 272 273 /* Try to initialize ACPI so that we can access the FADT. */ 274 i = acpi_Startup(); 275 if (ACPI_FAILURE(i)) { 276 printf("MADT: ACPI Startup failed with %s\n", 277 AcpiFormatException(i)); 278 printf("Try disabling either ACPI or apic support.\n"); 279 panic("Using MADT but ACPI doesn't work"); 280 } 281 282 ioapics = malloc(sizeof(*ioapics) * (IOAPIC_MAX_ID + 1), M_MADT, 283 M_WAITOK | M_ZERO); 284 285 /* First, we run through adding I/O APIC's. */ 286 madt_walk_table(madt_parse_apics, NULL); 287 288 /* Second, we run through the table tweaking interrupt sources. */ 289 madt_walk_table(madt_parse_ints, NULL); 290 291 /* 292 * If there was not an explicit override entry for the SCI, 293 * force it to use level trigger and active-low polarity. 294 */ 295 if (!madt_found_sci_override) { 296 if (madt_find_interrupt(AcpiGbl_FADT.SciInterrupt, &ioapic, 297 &pin) != 0) 298 printf("MADT: Could not find APIC for SCI IRQ %u\n", 299 AcpiGbl_FADT.SciInterrupt); 300 else { 301 printf( 302 "MADT: Forcing active-low polarity and level trigger for SCI\n"); 303 ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW); 304 ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL); 305 } 306 } 307 308 /* Third, we register all the I/O APIC's. */ 309 for (i = 0; i <= IOAPIC_MAX_ID; i++) 310 if (ioapics[i].io_apic != NULL) 311 ioapic_register(ioapics[i].io_apic); 312 313 /* Finally, we throw the switch to enable the I/O APIC's. */ 314 acpi_SetDefaultIntrModel(ACPI_INTR_APIC); 315 316 free(ioapics, M_MADT); 317 ioapics = NULL; 318 319 /* NB: this is the last use of the lapics array. */ 320 free(lapics, M_MADT); 321 lapics = NULL; 322 323 return (0); 324 } 325 326 static void 327 madt_register(void *dummy __unused) 328 { 329 330 apic_register_enumerator(&madt_enumerator); 331 } 332 SYSINIT(madt_register, SI_SUB_TUNABLES - 1, SI_ORDER_FIRST, madt_register, NULL); 333 334 /* 335 * Call the handler routine for each entry in the MADT table. 336 */ 337 static void 338 madt_walk_table(acpi_subtable_handler *handler, void *arg) 339 { 340 341 acpi_walk_subtables(madt + 1, (char *)madt + madt->Header.Length, 342 handler, arg); 343 } 344 345 static void 346 madt_parse_cpu(unsigned int apic_id, unsigned int flags) 347 { 348 349 if (!(flags & ACPI_MADT_ENABLED) || 350 #ifdef SMP 351 mp_ncpus == MAXCPU || 352 #endif 353 apic_id > MAX_APIC_ID) 354 return; 355 356 #ifdef SMP 357 mp_ncpus++; 358 mp_maxid = mp_ncpus - 1; 359 #endif 360 max_apic_id = max(apic_id, max_apic_id); 361 } 362 363 static void 364 madt_add_cpu(u_int acpi_id, u_int apic_id, u_int flags) 365 { 366 struct lapic_info *la; 367 368 /* 369 * The MADT does not include a BSP flag, so we have to let the 370 * MP code figure out which CPU is the BSP on its own. 371 */ 372 if (bootverbose) 373 printf("MADT: Found CPU APIC ID %u ACPI ID %u: %s\n", 374 apic_id, acpi_id, flags & ACPI_MADT_ENABLED ? 375 "enabled" : "disabled"); 376 if (!(flags & ACPI_MADT_ENABLED)) 377 return; 378 if (apic_id > max_apic_id) { 379 printf("MADT: Ignoring local APIC ID %u (too high)\n", 380 apic_id); 381 return; 382 } 383 384 la = &lapics[apic_id]; 385 KASSERT(la->la_enabled == 0, ("Duplicate local APIC ID %u", apic_id)); 386 la->la_enabled = 1; 387 la->la_acpi_id = acpi_id; 388 lapic_create(apic_id, 0); 389 } 390 391 static void 392 madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg) 393 { 394 ACPI_MADT_LOCAL_APIC *proc; 395 ACPI_MADT_LOCAL_X2APIC *x2apic; 396 397 switch (entry->Type) { 398 case ACPI_MADT_TYPE_LOCAL_APIC: 399 proc = (ACPI_MADT_LOCAL_APIC *)entry; 400 madt_parse_cpu(proc->Id, proc->LapicFlags); 401 break; 402 case ACPI_MADT_TYPE_LOCAL_X2APIC: 403 x2apic = (ACPI_MADT_LOCAL_X2APIC *)entry; 404 madt_parse_cpu(x2apic->LocalApicId, x2apic->LapicFlags); 405 break; 406 } 407 } 408 409 static void 410 madt_setup_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg) 411 { 412 ACPI_MADT_LOCAL_APIC *proc; 413 ACPI_MADT_LOCAL_X2APIC *x2apic; 414 415 switch (entry->Type) { 416 case ACPI_MADT_TYPE_LOCAL_APIC: 417 proc = (ACPI_MADT_LOCAL_APIC *)entry; 418 madt_add_cpu(proc->ProcessorId, proc->Id, proc->LapicFlags); 419 break; 420 case ACPI_MADT_TYPE_LOCAL_X2APIC: 421 x2apic = (ACPI_MADT_LOCAL_X2APIC *)entry; 422 madt_add_cpu(x2apic->Uid, x2apic->LocalApicId, 423 x2apic->LapicFlags); 424 break; 425 } 426 } 427 428 /* 429 * Add an I/O APIC from an entry in the table. 430 */ 431 static void 432 madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg __unused) 433 { 434 ACPI_MADT_IO_APIC *apic; 435 436 switch (entry->Type) { 437 case ACPI_MADT_TYPE_IO_APIC: 438 apic = (ACPI_MADT_IO_APIC *)entry; 439 if (bootverbose) 440 printf( 441 "MADT: Found IO APIC ID %u, Interrupt %u at %p\n", 442 apic->Id, apic->GlobalIrqBase, 443 (void *)(uintptr_t)apic->Address); 444 if (apic->Id > IOAPIC_MAX_ID) 445 panic("%s: I/O APIC ID %u too high", __func__, 446 apic->Id); 447 if (ioapics[apic->Id].io_apic != NULL) 448 panic("%s: Double APIC ID %u", __func__, apic->Id); 449 ioapics[apic->Id].io_apic = ioapic_create(apic->Address, 450 apic->Id, apic->GlobalIrqBase); 451 ioapics[apic->Id].io_vector = apic->GlobalIrqBase; 452 break; 453 default: 454 break; 455 } 456 } 457 458 /* 459 * Determine properties of an interrupt source. Note that for ACPI these 460 * functions are only used for ISA interrupts, so we assume ISA bus values 461 * (Active Hi, Edge Triggered) for conforming values except for the ACPI 462 * SCI for which we use Active Lo, Level Triggered. 463 */ 464 static enum intr_polarity 465 interrupt_polarity(UINT16 IntiFlags, UINT8 Source) 466 { 467 468 switch (IntiFlags & ACPI_MADT_POLARITY_MASK) { 469 default: 470 printf("WARNING: Bogus Interrupt Polarity. Assume CONFORMS\n"); 471 /* FALLTHROUGH*/ 472 case ACPI_MADT_POLARITY_CONFORMS: 473 if (Source == AcpiGbl_FADT.SciInterrupt) 474 return (INTR_POLARITY_LOW); 475 else 476 return (INTR_POLARITY_HIGH); 477 case ACPI_MADT_POLARITY_ACTIVE_HIGH: 478 return (INTR_POLARITY_HIGH); 479 case ACPI_MADT_POLARITY_ACTIVE_LOW: 480 return (INTR_POLARITY_LOW); 481 } 482 } 483 484 static enum intr_trigger 485 interrupt_trigger(UINT16 IntiFlags, UINT8 Source) 486 { 487 488 switch (IntiFlags & ACPI_MADT_TRIGGER_MASK) { 489 default: 490 printf("WARNING: Bogus Interrupt Trigger Mode. Assume CONFORMS.\n"); 491 /*FALLTHROUGH*/ 492 case ACPI_MADT_TRIGGER_CONFORMS: 493 if (Source == AcpiGbl_FADT.SciInterrupt) 494 return (INTR_TRIGGER_LEVEL); 495 else 496 return (INTR_TRIGGER_EDGE); 497 case ACPI_MADT_TRIGGER_EDGE: 498 return (INTR_TRIGGER_EDGE); 499 case ACPI_MADT_TRIGGER_LEVEL: 500 return (INTR_TRIGGER_LEVEL); 501 } 502 } 503 504 /* 505 * Find the local APIC ID associated with a given ACPI Processor ID. 506 */ 507 static int 508 madt_find_cpu(u_int acpi_id, u_int *apic_id) 509 { 510 int i; 511 512 for (i = 0; i <= max_apic_id; i++) { 513 if (!lapics[i].la_enabled) 514 continue; 515 if (lapics[i].la_acpi_id != acpi_id) 516 continue; 517 *apic_id = i; 518 return (0); 519 } 520 return (ENOENT); 521 } 522 523 /* 524 * Find the IO APIC and pin on that APIC associated with a given global 525 * interrupt. 526 */ 527 static int 528 madt_find_interrupt(int intr, void **apic, u_int *pin) 529 { 530 int i, best; 531 532 best = -1; 533 for (i = 0; i <= IOAPIC_MAX_ID; i++) { 534 if (ioapics[i].io_apic == NULL || 535 ioapics[i].io_vector > intr) 536 continue; 537 if (best == -1 || 538 ioapics[best].io_vector < ioapics[i].io_vector) 539 best = i; 540 } 541 if (best == -1) 542 return (ENOENT); 543 *apic = ioapics[best].io_apic; 544 *pin = intr - ioapics[best].io_vector; 545 if (*pin > 32) 546 printf("WARNING: Found intpin of %u for vector %d\n", *pin, 547 intr); 548 return (0); 549 } 550 551 void 552 madt_parse_interrupt_values(void *entry, 553 enum intr_trigger *trig, enum intr_polarity *pol) 554 { 555 ACPI_MADT_INTERRUPT_OVERRIDE *intr; 556 char buf[64]; 557 558 intr = entry; 559 560 if (bootverbose) 561 printf("MADT: Interrupt override: source %u, irq %u\n", 562 intr->SourceIrq, intr->GlobalIrq); 563 KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero")); 564 565 /* 566 * Lookup the appropriate trigger and polarity modes for this 567 * entry. 568 */ 569 *trig = interrupt_trigger(intr->IntiFlags, intr->SourceIrq); 570 *pol = interrupt_polarity(intr->IntiFlags, intr->SourceIrq); 571 572 /* 573 * If the SCI is identity mapped but has edge trigger and 574 * active-hi polarity or the force_sci_lo tunable is set, 575 * force it to use level/lo. 576 */ 577 if (intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) { 578 madt_found_sci_override = 1; 579 if (getenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) { 580 if (tolower(buf[0]) == 'e') 581 *trig = INTR_TRIGGER_EDGE; 582 else if (tolower(buf[0]) == 'l') 583 *trig = INTR_TRIGGER_LEVEL; 584 else 585 panic( 586 "Invalid trigger %s: must be 'edge' or 'level'", 587 buf); 588 printf("MADT: Forcing SCI to %s trigger\n", 589 *trig == INTR_TRIGGER_EDGE ? "edge" : "level"); 590 } 591 if (getenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) { 592 if (tolower(buf[0]) == 'h') 593 *pol = INTR_POLARITY_HIGH; 594 else if (tolower(buf[0]) == 'l') 595 *pol = INTR_POLARITY_LOW; 596 else 597 panic( 598 "Invalid polarity %s: must be 'high' or 'low'", 599 buf); 600 printf("MADT: Forcing SCI to active %s polarity\n", 601 *pol == INTR_POLARITY_HIGH ? "high" : "low"); 602 } 603 } 604 } 605 606 /* 607 * Parse an interrupt source override for an ISA interrupt. 608 */ 609 static void 610 madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr) 611 { 612 void *new_ioapic, *old_ioapic; 613 u_int new_pin, old_pin; 614 enum intr_trigger trig; 615 enum intr_polarity pol; 616 617 if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 && 618 intr->GlobalIrq == 2) { 619 if (bootverbose) 620 printf("MADT: Skipping timer override\n"); 621 return; 622 } 623 624 if (madt_find_interrupt(intr->GlobalIrq, &new_ioapic, &new_pin) != 0) { 625 printf("MADT: Could not find APIC for vector %u (IRQ %u)\n", 626 intr->GlobalIrq, intr->SourceIrq); 627 return; 628 } 629 630 madt_parse_interrupt_values(intr, &trig, &pol); 631 632 /* Remap the IRQ if it is mapped to a different interrupt vector. */ 633 if (intr->SourceIrq != intr->GlobalIrq) { 634 /* 635 * If the SCI is remapped to a non-ISA global interrupt, 636 * then override the vector we use to setup and allocate 637 * the interrupt. 638 */ 639 if (intr->GlobalIrq > 15 && 640 intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) 641 acpi_OverrideInterruptLevel(intr->GlobalIrq); 642 else 643 ioapic_remap_vector(new_ioapic, new_pin, 644 intr->SourceIrq); 645 if (madt_find_interrupt(intr->SourceIrq, &old_ioapic, 646 &old_pin) != 0) 647 printf("MADT: Could not find APIC for source IRQ %u\n", 648 intr->SourceIrq); 649 else if (ioapic_get_vector(old_ioapic, old_pin) == 650 intr->SourceIrq) 651 ioapic_disable_pin(old_ioapic, old_pin); 652 } 653 654 /* Program the polarity and trigger mode. */ 655 ioapic_set_triggermode(new_ioapic, new_pin, trig); 656 ioapic_set_polarity(new_ioapic, new_pin, pol); 657 } 658 659 /* 660 * Parse an entry for an NMI routed to an IO APIC. 661 */ 662 static void 663 madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi) 664 { 665 void *ioapic; 666 u_int pin; 667 668 if (madt_find_interrupt(nmi->GlobalIrq, &ioapic, &pin) != 0) { 669 printf("MADT: Could not find APIC for vector %u\n", 670 nmi->GlobalIrq); 671 return; 672 } 673 674 ioapic_set_nmi(ioapic, pin); 675 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS)) 676 ioapic_set_triggermode(ioapic, pin, 677 interrupt_trigger(nmi->IntiFlags, 0)); 678 if (!(nmi->IntiFlags & ACPI_MADT_POLARITY_CONFORMS)) 679 ioapic_set_polarity(ioapic, pin, 680 interrupt_polarity(nmi->IntiFlags, 0)); 681 } 682 683 /* 684 * Parse an entry for an NMI routed to a local APIC LVT pin. 685 */ 686 static void 687 madt_handle_local_nmi(u_int acpi_id, UINT8 Lint, UINT16 IntiFlags) 688 { 689 u_int apic_id, pin; 690 691 if (acpi_id == 0xffffffff) 692 apic_id = APIC_ID_ALL; 693 else if (madt_find_cpu(acpi_id, &apic_id) != 0) { 694 if (bootverbose) 695 printf("MADT: Ignoring local NMI routed to " 696 "ACPI CPU %u\n", acpi_id); 697 return; 698 } 699 if (Lint == 0) 700 pin = APIC_LVT_LINT0; 701 else 702 pin = APIC_LVT_LINT1; 703 lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI); 704 if (!(IntiFlags & ACPI_MADT_TRIGGER_CONFORMS)) 705 lapic_set_lvt_triggermode(apic_id, pin, 706 interrupt_trigger(IntiFlags, 0)); 707 if (!(IntiFlags & ACPI_MADT_POLARITY_CONFORMS)) 708 lapic_set_lvt_polarity(apic_id, pin, 709 interrupt_polarity(IntiFlags, 0)); 710 } 711 712 static void 713 madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi) 714 { 715 716 madt_handle_local_nmi(nmi->ProcessorId == 0xff ? 0xffffffff : 717 nmi->ProcessorId, nmi->Lint, nmi->IntiFlags); 718 } 719 720 static void 721 madt_parse_local_x2apic_nmi(ACPI_MADT_LOCAL_X2APIC_NMI *nmi) 722 { 723 724 madt_handle_local_nmi(nmi->Uid, nmi->Lint, nmi->IntiFlags); 725 } 726 727 /* 728 * Parse interrupt entries. 729 */ 730 static void 731 madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, void *arg __unused) 732 { 733 734 switch (entry->Type) { 735 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: 736 madt_parse_interrupt_override( 737 (ACPI_MADT_INTERRUPT_OVERRIDE *)entry); 738 break; 739 case ACPI_MADT_TYPE_NMI_SOURCE: 740 madt_parse_nmi((ACPI_MADT_NMI_SOURCE *)entry); 741 break; 742 case ACPI_MADT_TYPE_LOCAL_APIC_NMI: 743 madt_parse_local_nmi((ACPI_MADT_LOCAL_APIC_NMI *)entry); 744 break; 745 case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: 746 madt_parse_local_x2apic_nmi( 747 (ACPI_MADT_LOCAL_X2APIC_NMI *)entry); 748 break; 749 } 750 } 751 752 /* 753 * Setup per-CPU ACPI IDs. 754 */ 755 static void 756 madt_set_ids(void *dummy) 757 { 758 struct lapic_info *la; 759 struct pcpu *pc; 760 u_int i; 761 762 if (madt == NULL) 763 return; 764 765 KASSERT(lapics != NULL, ("local APICs not initialized")); 766 767 CPU_FOREACH(i) { 768 pc = pcpu_find(i); 769 KASSERT(pc != NULL, ("no pcpu data for CPU %u", i)); 770 la = &lapics[pc->pc_apic_id]; 771 if (!la->la_enabled) 772 panic("APIC: CPU with APIC ID %u is not enabled", 773 pc->pc_apic_id); 774 pc->pc_acpi_id = la->la_acpi_id; 775 if (bootverbose) 776 printf("APIC: CPU %u has ACPI ID %u\n", i, 777 la->la_acpi_id); 778 } 779 } 780 SYSINIT(madt_set_ids, SI_SUB_CPU, SI_ORDER_MIDDLE, madt_set_ids, NULL);
Cache object: 4356b36033b47e9dcaf0c48a7899d3d4
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