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